/* Omit from static analysis. */ #ifndef __clang_analyzer__ /* * Single source autogenerated distributable for Duktape 2.4.0. * * Git commit external (external). * Git branch external. * * See Duktape AUTHORS.rst and LICENSE.txt for copyright and * licensing information. */ /* LICENSE.txt */ /* * =============== * Duktape license * =============== * * (http://opensource.org/licenses/MIT) * * Copyright (c) 2013-2019 by Duktape authors (see AUTHORS.rst) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /* AUTHORS.rst */ /* * =============== * Duktape authors * =============== * * Copyright * ========= * * Duktape copyrights are held by its authors. Each author has a copyright * to their contribution, and agrees to irrevocably license the contribution * under the Duktape ``LICENSE.txt``. * * Authors * ======= * * Please include an e-mail address, a link to your GitHub profile, or something * similar to allow your contribution to be identified accurately. * * The following people have contributed code, website contents, or Wiki contents, * and agreed to irrevocably license their contributions under the Duktape * ``LICENSE.txt`` (in order of appearance): * * * Sami Vaarala * * Niki Dobrev * * Andreas \u00d6man * * L\u00e1szl\u00f3 Lang\u00f3 * * Legimet * * Karl Skomski * * Bruce Pascoe * * Ren\u00e9 Hollander * * Julien Hamaide (https://github.com/crazyjul) * * Sebastian G\u00f6tte (https://github.com/jaseg) * * Tomasz Magulski (https://github.com/magul) * * \D. Bohdan (https://github.com/dbohdan) * * Ond\u0159ej Jirman (https://github.com/megous) * * Sa\u00fal Ibarra Corretg\u00e9 * * Jeremy HU * * Ole Andr\u00e9 Vadla Ravn\u00e5s (https://github.com/oleavr) * * Harold Brenes (https://github.com/harold-b) * * Oliver Crow (https://github.com/ocrow) * * Jakub Ch\u0142api\u0144ski (https://github.com/jchlapinski) * * Brett Vickers (https://github.com/beevik) * * Dominik Okwieka (https://github.com/okitec) * * Remko Tron\u00e7on (https://el-tramo.be) * * Romero Malaquias (rbsm@ic.ufal.br) * * Michael Drake * * Steven Don (https://github.com/shdon) * * Simon Stone (https://github.com/sstone1) * * \J. McC. (https://github.com/jmhmccr) * * Jakub Nowakowski (https://github.com/jimvonmoon) * * Tommy Nguyen (https://github.com/tn0502) * * Fabrice Fontaine (https://github.com/ffontaine) * * Christopher Hiller (https://github.com/boneskull) * * Gonzalo Diethelm (https://github.com/gonzus) * * Michal Kasperek (https://github.com/michalkas) * * Andrew Janke (https://github.com/apjanke) * * Steve Fan (https://github.com/stevefan1999) * * Edward Betts (https://github.com/edwardbetts) * * Ozhan Duz (https://github.com/webfolderio) * * Akos Kiss (https://github.com/akosthekiss) * * TheBrokenRail (https://github.com/TheBrokenRail) * * Jesse Doyle (https://github.com/jessedoyle) * * Gero Kuehn (https://github.com/dc6jgk) * * James Swift (https://github.com/phraemer) * * Luis de Bethencourt (https://github.com/luisbg) * * Ian Whyman (https://github.com/v00d00) * * Other contributions * =================== * * The following people have contributed something other than code (e.g. reported * bugs, provided ideas, etc; roughly in order of appearance): * * * Greg Burns * * Anthony Rabine * * Carlos Costa * * Aur\u00e9lien Bouilland * * Preet Desai (Pris Matic) * * judofyr (http://www.reddit.com/user/judofyr) * * Jason Woofenden * * Micha\u0142 Przyby\u015b * * Anthony Howe * * Conrad Pankoff * * Jim Schimpf * * Rajaran Gaunker (https://github.com/zimbabao) * * Andreas \u00d6man * * Doug Sanden * * Josh Engebretson (https://github.com/JoshEngebretson) * * Remo Eichenberger (https://github.com/remoe) * * Mamod Mehyar (https://github.com/mamod) * * David Demelier (https://github.com/markand) * * Tim Caswell (https://github.com/creationix) * * Mitchell Blank Jr (https://github.com/mitchblank) * * https://github.com/yushli * * Seo Sanghyeon (https://github.com/sanxiyn) * * Han ChoongWoo (https://github.com/tunz) * * Joshua Peek (https://github.com/josh) * * Bruce E. Pascoe (https://github.com/fatcerberus) * * https://github.com/Kelledin * * https://github.com/sstruchtrup * * Michael Drake (https://github.com/tlsa) * * https://github.com/chris-y * * Laurent Zubiaur (https://github.com/lzubiaur) * * Neil Kolban (https://github.com/nkolban) * * Wilhelm Wanecek (https://github.com/wanecek) * * Andrew Janke (https://github.com/apjanke) * * Unamer (https://github.com/unamer) * * Karl Dahlke (eklhad@gmail.com) * * If you are accidentally missing from this list, send me an e-mail * (``sami.vaarala@iki.fi``) and I'll fix the omission. */ /* * Replacements for missing platform functions. * * Unlike the originals, fpclassify() and signbit() replacements don't * work on any floating point types, only doubles. The C typing here * mimics the standard prototypes. */ /* #include duk_internal.h */ /* * Top-level include file to be used for all (internal) source files. * * Source files should not include individual header files, as they * have not been designed to be individually included. */ #if !defined(DUK_INTERNAL_H_INCLUDED) #define DUK_INTERNAL_H_INCLUDED /* * The 'duktape.h' header provides the public API, but also handles all * compiler and platform specific feature detection, Duktape feature * resolution, inclusion of system headers, etc. These have been merged * because the public API is also dependent on e.g. detecting appropriate * C types which is quite platform/compiler specific especially for a non-C99 * build. The public API is also dependent on the resolved feature set. * * Some actions taken by the merged header (such as including system headers) * are not appropriate for building a user application. The define * DUK_COMPILING_DUKTAPE allows the merged header to skip/include some * sections depending on what is being built. */ #define DUK_COMPILING_DUKTAPE #include "duktape.h" /* * Duktape includes (other than duk_features.h) * * The header files expect to be included in an order which satisfies header * dependencies correctly (the headers themselves don't include any other * includes). Forward declarations are used to break circular struct/typedef * dependencies. */ /* #include duk_dblunion.h */ /* * Union to access IEEE double memory representation, indexes for double * memory representation, and some macros for double manipulation. * * Also used by packed duk_tval. Use a union for bit manipulation to * minimize aliasing issues in practice. The C99 standard does not * guarantee that this should work, but it's a very widely supported * practice for low level manipulation. * * IEEE double format summary: * * seeeeeee eeeeffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff * A B C D E F G H * * s sign bit * eee... exponent field * fff... fraction * * See http://en.wikipedia.org/wiki/Double_precision_floating-point_format. * * NaNs are represented as exponent 0x7ff and mantissa != 0. The NaN is a * signaling NaN when the highest bit of the mantissa is zero, and a quiet * NaN when the highest bit is set. * * At least three memory layouts are relevant here: * * A B C D E F G H Big endian (e.g. 68k) DUK_USE_DOUBLE_BE * H G F E D C B A Little endian (e.g. x86) DUK_USE_DOUBLE_LE * D C B A H G F E Mixed/cross endian (e.g. ARM) DUK_USE_DOUBLE_ME * * ARM is a special case: ARM double values are in mixed/cross endian * format while ARM duk_uint64_t values are in standard little endian * format (H G F E D C B A). When a double is read as a duk_uint64_t * from memory, the register will contain the (logical) value * E F G H A B C D. This requires some special handling below. * * Indexes of various types (8-bit, 16-bit, 32-bit) in memory relative to * the logical (big endian) order: * * byte order duk_uint8_t duk_uint16_t duk_uint32_t * BE 01234567 0123 01 * LE 76543210 3210 10 * ME (ARM) 32107654 1032 01 * * Some processors may alter NaN values in a floating point load+store. * For instance, on X86 a FLD + FSTP may convert a signaling NaN to a * quiet one. This is catastrophic when NaN space is used in packed * duk_tval values. See: misc/clang_aliasing.c. */ #if !defined(DUK_DBLUNION_H_INCLUDED) #define DUK_DBLUNION_H_INCLUDED /* * Union for accessing double parts, also serves as packed duk_tval */ union duk_double_union { double d; float f[2]; #if defined(DUK_USE_64BIT_OPS) duk_uint64_t ull[1]; #endif duk_uint32_t ui[2]; duk_uint16_t us[4]; duk_uint8_t uc[8]; #if defined(DUK_USE_PACKED_TVAL) void *vp[2]; /* used by packed duk_tval, assumes sizeof(void *) == 4 */ #endif }; typedef union duk_double_union duk_double_union; /* * Indexes of various types with respect to big endian (logical) layout */ #if defined(DUK_USE_DOUBLE_LE) #if defined(DUK_USE_64BIT_OPS) #define DUK_DBL_IDX_ULL0 0 #endif #define DUK_DBL_IDX_UI0 1 #define DUK_DBL_IDX_UI1 0 #define DUK_DBL_IDX_US0 3 #define DUK_DBL_IDX_US1 2 #define DUK_DBL_IDX_US2 1 #define DUK_DBL_IDX_US3 0 #define DUK_DBL_IDX_UC0 7 #define DUK_DBL_IDX_UC1 6 #define DUK_DBL_IDX_UC2 5 #define DUK_DBL_IDX_UC3 4 #define DUK_DBL_IDX_UC4 3 #define DUK_DBL_IDX_UC5 2 #define DUK_DBL_IDX_UC6 1 #define DUK_DBL_IDX_UC7 0 #define DUK_DBL_IDX_VP0 DUK_DBL_IDX_UI0 /* packed tval */ #define DUK_DBL_IDX_VP1 DUK_DBL_IDX_UI1 /* packed tval */ #elif defined(DUK_USE_DOUBLE_BE) #if defined(DUK_USE_64BIT_OPS) #define DUK_DBL_IDX_ULL0 0 #endif #define DUK_DBL_IDX_UI0 0 #define DUK_DBL_IDX_UI1 1 #define DUK_DBL_IDX_US0 0 #define DUK_DBL_IDX_US1 1 #define DUK_DBL_IDX_US2 2 #define DUK_DBL_IDX_US3 3 #define DUK_DBL_IDX_UC0 0 #define DUK_DBL_IDX_UC1 1 #define DUK_DBL_IDX_UC2 2 #define DUK_DBL_IDX_UC3 3 #define DUK_DBL_IDX_UC4 4 #define DUK_DBL_IDX_UC5 5 #define DUK_DBL_IDX_UC6 6 #define DUK_DBL_IDX_UC7 7 #define DUK_DBL_IDX_VP0 DUK_DBL_IDX_UI0 /* packed tval */ #define DUK_DBL_IDX_VP1 DUK_DBL_IDX_UI1 /* packed tval */ #elif defined(DUK_USE_DOUBLE_ME) #if defined(DUK_USE_64BIT_OPS) #define DUK_DBL_IDX_ULL0 0 /* not directly applicable, byte order differs from a double */ #endif #define DUK_DBL_IDX_UI0 0 #define DUK_DBL_IDX_UI1 1 #define DUK_DBL_IDX_US0 1 #define DUK_DBL_IDX_US1 0 #define DUK_DBL_IDX_US2 3 #define DUK_DBL_IDX_US3 2 #define DUK_DBL_IDX_UC0 3 #define DUK_DBL_IDX_UC1 2 #define DUK_DBL_IDX_UC2 1 #define DUK_DBL_IDX_UC3 0 #define DUK_DBL_IDX_UC4 7 #define DUK_DBL_IDX_UC5 6 #define DUK_DBL_IDX_UC6 5 #define DUK_DBL_IDX_UC7 4 #define DUK_DBL_IDX_VP0 DUK_DBL_IDX_UI0 /* packed tval */ #define DUK_DBL_IDX_VP1 DUK_DBL_IDX_UI1 /* packed tval */ #else #error internal error #endif /* * Helper macros for reading/writing memory representation parts, used * by duk_numconv.c and duk_tval.h. */ #define DUK_DBLUNION_SET_DOUBLE(u,v) do { \ (u)->d = (v); \ } while (0) #define DUK_DBLUNION_SET_HIGH32(u,v) do { \ (u)->ui[DUK_DBL_IDX_UI0] = (duk_uint32_t) (v); \ } while (0) #if defined(DUK_USE_64BIT_OPS) #if defined(DUK_USE_DOUBLE_ME) #define DUK_DBLUNION_SET_HIGH32_ZERO_LOW32(u,v) do { \ (u)->ull[DUK_DBL_IDX_ULL0] = (duk_uint64_t) (v); \ } while (0) #else #define DUK_DBLUNION_SET_HIGH32_ZERO_LOW32(u,v) do { \ (u)->ull[DUK_DBL_IDX_ULL0] = ((duk_uint64_t) (v)) << 32; \ } while (0) #endif #else /* DUK_USE_64BIT_OPS */ #define DUK_DBLUNION_SET_HIGH32_ZERO_LOW32(u,v) do { \ (u)->ui[DUK_DBL_IDX_UI0] = (duk_uint32_t) (v); \ (u)->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) 0; \ } while (0) #endif /* DUK_USE_64BIT_OPS */ #define DUK_DBLUNION_SET_LOW32(u,v) do { \ (u)->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (v); \ } while (0) #define DUK_DBLUNION_GET_DOUBLE(u) ((u)->d) #define DUK_DBLUNION_GET_HIGH32(u) ((u)->ui[DUK_DBL_IDX_UI0]) #define DUK_DBLUNION_GET_LOW32(u) ((u)->ui[DUK_DBL_IDX_UI1]) #if defined(DUK_USE_64BIT_OPS) #if defined(DUK_USE_DOUBLE_ME) #define DUK_DBLUNION_SET_UINT64(u,v) do { \ (u)->ui[DUK_DBL_IDX_UI0] = (duk_uint32_t) ((v) >> 32); \ (u)->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (v); \ } while (0) #define DUK_DBLUNION_GET_UINT64(u) \ ((((duk_uint64_t) (u)->ui[DUK_DBL_IDX_UI0]) << 32) | \ ((duk_uint64_t) (u)->ui[DUK_DBL_IDX_UI1])) #else #define DUK_DBLUNION_SET_UINT64(u,v) do { \ (u)->ull[DUK_DBL_IDX_ULL0] = (duk_uint64_t) (v); \ } while (0) #define DUK_DBLUNION_GET_UINT64(u) ((u)->ull[DUK_DBL_IDX_ULL0]) #endif #define DUK_DBLUNION_SET_INT64(u,v) DUK_DBLUNION_SET_UINT64((u), (duk_uint64_t) (v)) #define DUK_DBLUNION_GET_INT64(u) ((duk_int64_t) DUK_DBLUNION_GET_UINT64((u))) #endif /* DUK_USE_64BIT_OPS */ /* * Double NaN manipulation macros related to NaN normalization needed when * using the packed duk_tval representation. NaN normalization is necessary * to keep double values compatible with the duk_tval format. * * When packed duk_tval is used, the NaN space is used to store pointers * and other tagged values in addition to NaNs. Actual NaNs are normalized * to a specific quiet NaN. The macros below are used by the implementation * to check and normalize NaN values when they might be created. The macros * are essentially NOPs when the non-packed duk_tval representation is used. * * A FULL check is exact and checks all bits. A NOTFULL check is used by * the packed duk_tval and works correctly for all NaNs except those that * begin with 0x7ff0. Since the 'normalized NaN' values used with packed * duk_tval begin with 0x7ff8, the partial check is reliable when packed * duk_tval is used. The 0x7ff8 prefix means the normalized NaN will be a * quiet NaN regardless of its remaining lower bits. * * The ME variant below is specifically for ARM byte order, which has the * feature that while doubles have a mixed byte order (32107654), unsigned * long long values has a little endian byte order (76543210). When writing * a logical double value through a ULL pointer, the 32-bit words need to be * swapped; hence the #if defined()s below for ULL writes with DUK_USE_DOUBLE_ME. * This is not full ARM support but suffices for some environments. */ #if defined(DUK_USE_64BIT_OPS) #if defined(DUK_USE_DOUBLE_ME) /* Macros for 64-bit ops + mixed endian doubles. */ #define DUK__DBLUNION_SET_NAN_FULL(u) do { \ (u)->ull[DUK_DBL_IDX_ULL0] = DUK_U64_CONSTANT(0x000000007ff80000); \ } while (0) #define DUK__DBLUNION_IS_NAN_FULL(u) \ ((((u)->ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x000000007ff00000)) == DUK_U64_CONSTANT(0x000000007ff00000)) && \ ((((u)->ull[DUK_DBL_IDX_ULL0]) & DUK_U64_CONSTANT(0xffffffff000fffff)) != 0)) #define DUK__DBLUNION_IS_NORMALIZED_NAN_FULL(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0x000000007ff80000)) #define DUK__DBLUNION_IS_ANYINF(u) \ (((u)->ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0xffffffff7fffffff)) == DUK_U64_CONSTANT(0x000000007ff00000)) #define DUK__DBLUNION_IS_POSINF(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0x000000007ff00000)) #define DUK__DBLUNION_IS_NEGINF(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0x00000000fff00000)) #define DUK__DBLUNION_IS_ANYZERO(u) \ (((u)->ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0xffffffff7fffffff)) == DUK_U64_CONSTANT(0x0000000000000000)) #define DUK__DBLUNION_IS_POSZERO(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0x0000000000000000)) #define DUK__DBLUNION_IS_NEGZERO(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0x0000000080000000)) #else /* Macros for 64-bit ops + big/little endian doubles. */ #define DUK__DBLUNION_SET_NAN_FULL(u) do { \ (u)->ull[DUK_DBL_IDX_ULL0] = DUK_U64_CONSTANT(0x7ff8000000000000); \ } while (0) #define DUK__DBLUNION_IS_NAN_FULL(u) \ ((((u)->ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x7ff0000000000000)) == DUK_U64_CONSTANT(0x7ff0000000000000)) && \ ((((u)->ull[DUK_DBL_IDX_ULL0]) & DUK_U64_CONSTANT(0x000fffffffffffff)) != 0)) #define DUK__DBLUNION_IS_NORMALIZED_NAN_FULL(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0x7ff8000000000000)) #define DUK__DBLUNION_IS_ANYINF(u) \ (((u)->ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x7fffffffffffffff)) == DUK_U64_CONSTANT(0x7ff0000000000000)) #define DUK__DBLUNION_IS_POSINF(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0x7ff0000000000000)) #define DUK__DBLUNION_IS_NEGINF(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0xfff0000000000000)) #define DUK__DBLUNION_IS_ANYZERO(u) \ (((u)->ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x7fffffffffffffff)) == DUK_U64_CONSTANT(0x0000000000000000)) #define DUK__DBLUNION_IS_POSZERO(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0x0000000000000000)) #define DUK__DBLUNION_IS_NEGZERO(u) \ ((u)->ull[DUK_DBL_IDX_ULL0] == DUK_U64_CONSTANT(0x8000000000000000)) #endif #else /* DUK_USE_64BIT_OPS */ /* Macros for no 64-bit ops, any endianness. */ #define DUK__DBLUNION_SET_NAN_FULL(u) do { \ (u)->ui[DUK_DBL_IDX_UI0] = (duk_uint32_t) 0x7ff80000UL; \ (u)->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) 0x00000000UL; \ } while (0) #define DUK__DBLUNION_IS_NAN_FULL(u) \ ((((u)->ui[DUK_DBL_IDX_UI0] & 0x7ff00000UL) == 0x7ff00000UL) && \ (((u)->ui[DUK_DBL_IDX_UI0] & 0x000fffffUL) != 0 || \ (u)->ui[DUK_DBL_IDX_UI1] != 0)) #define DUK__DBLUNION_IS_NORMALIZED_NAN_FULL(u) \ (((u)->ui[DUK_DBL_IDX_UI0] == 0x7ff80000UL) && \ ((u)->ui[DUK_DBL_IDX_UI1] == 0x00000000UL)) #define DUK__DBLUNION_IS_ANYINF(u) \ ((((u)->ui[DUK_DBL_IDX_UI0] & 0x7fffffffUL) == 0x7ff00000UL) && \ ((u)->ui[DUK_DBL_IDX_UI1] == 0x00000000UL)) #define DUK__DBLUNION_IS_POSINF(u) \ (((u)->ui[DUK_DBL_IDX_UI0] == 0x7ff00000UL) && \ ((u)->ui[DUK_DBL_IDX_UI1] == 0x00000000UL)) #define DUK__DBLUNION_IS_NEGINF(u) \ (((u)->ui[DUK_DBL_IDX_UI0] == 0xfff00000UL) && \ ((u)->ui[DUK_DBL_IDX_UI1] == 0x00000000UL)) #define DUK__DBLUNION_IS_ANYZERO(u) \ ((((u)->ui[DUK_DBL_IDX_UI0] & 0x7fffffffUL) == 0x00000000UL) && \ ((u)->ui[DUK_DBL_IDX_UI1] == 0x00000000UL)) #define DUK__DBLUNION_IS_POSZERO(u) \ (((u)->ui[DUK_DBL_IDX_UI0] == 0x00000000UL) && \ ((u)->ui[DUK_DBL_IDX_UI1] == 0x00000000UL)) #define DUK__DBLUNION_IS_NEGZERO(u) \ (((u)->ui[DUK_DBL_IDX_UI0] == 0x80000000UL) && \ ((u)->ui[DUK_DBL_IDX_UI1] == 0x00000000UL)) #endif /* DUK_USE_64BIT_OPS */ #define DUK__DBLUNION_SET_NAN_NOTFULL(u) do { \ (u)->us[DUK_DBL_IDX_US0] = 0x7ff8UL; \ } while (0) #define DUK__DBLUNION_IS_NAN_NOTFULL(u) \ /* E == 0x7ff, topmost four bits of F != 0 => assume NaN */ \ ((((u)->us[DUK_DBL_IDX_US0] & 0x7ff0UL) == 0x7ff0UL) && \ (((u)->us[DUK_DBL_IDX_US0] & 0x000fUL) != 0x0000UL)) #define DUK__DBLUNION_IS_NORMALIZED_NAN_NOTFULL(u) \ /* E == 0x7ff, F == 8 => normalized NaN */ \ ((u)->us[DUK_DBL_IDX_US0] == 0x7ff8UL) #define DUK__DBLUNION_NORMALIZE_NAN_CHECK_FULL(u) do { \ if (DUK__DBLUNION_IS_NAN_FULL((u))) { \ DUK__DBLUNION_SET_NAN_FULL((u)); \ } \ } while (0) #define DUK__DBLUNION_NORMALIZE_NAN_CHECK_NOTFULL(u) do { \ if (DUK__DBLUNION_IS_NAN_NOTFULL((u))) { \ DUK__DBLUNION_SET_NAN_NOTFULL((u)); \ } \ } while (0) /* Concrete macros for NaN handling used by the implementation internals. * Chosen so that they match the duk_tval representation: with a packed * duk_tval, ensure NaNs are properly normalized; with a non-packed duk_tval * these are essentially NOPs. */ #if defined(DUK_USE_PACKED_TVAL) #if defined(DUK_USE_FULL_TVAL) #define DUK_DBLUNION_NORMALIZE_NAN_CHECK(u) DUK__DBLUNION_NORMALIZE_NAN_CHECK_FULL((u)) #define DUK_DBLUNION_IS_NAN(u) DUK__DBLUNION_IS_NAN_FULL((u)) #define DUK_DBLUNION_IS_NORMALIZED_NAN(u) DUK__DBLUNION_IS_NORMALIZED_NAN_FULL((u)) #define DUK_DBLUNION_SET_NAN(d) DUK__DBLUNION_SET_NAN_FULL((d)) #else #define DUK_DBLUNION_NORMALIZE_NAN_CHECK(u) DUK__DBLUNION_NORMALIZE_NAN_CHECK_NOTFULL((u)) #define DUK_DBLUNION_IS_NAN(u) DUK__DBLUNION_IS_NAN_NOTFULL((u)) #define DUK_DBLUNION_IS_NORMALIZED_NAN(u) DUK__DBLUNION_IS_NORMALIZED_NAN_NOTFULL((u)) #define DUK_DBLUNION_SET_NAN(d) DUK__DBLUNION_SET_NAN_NOTFULL((d)) #endif #define DUK_DBLUNION_IS_NORMALIZED(u) \ (!DUK_DBLUNION_IS_NAN((u)) || /* either not a NaN */ \ DUK_DBLUNION_IS_NORMALIZED_NAN((u))) /* or is a normalized NaN */ #else /* DUK_USE_PACKED_TVAL */ #define DUK_DBLUNION_NORMALIZE_NAN_CHECK(u) /* nop: no need to normalize */ #define DUK_DBLUNION_IS_NAN(u) DUK__DBLUNION_IS_NAN_FULL((u)) /* (DUK_ISNAN((u)->d)) */ #define DUK_DBLUNION_IS_NORMALIZED_NAN(u) DUK__DBLUNION_IS_NAN_FULL((u)) /* (DUK_ISNAN((u)->d)) */ #define DUK_DBLUNION_IS_NORMALIZED(u) 1 /* all doubles are considered normalized */ #define DUK_DBLUNION_SET_NAN(u) do { \ /* in non-packed representation we don't care about which NaN is used */ \ (u)->d = DUK_DOUBLE_NAN; \ } while (0) #endif /* DUK_USE_PACKED_TVAL */ #define DUK_DBLUNION_IS_ANYINF(u) DUK__DBLUNION_IS_ANYINF((u)) #define DUK_DBLUNION_IS_POSINF(u) DUK__DBLUNION_IS_POSINF((u)) #define DUK_DBLUNION_IS_NEGINF(u) DUK__DBLUNION_IS_NEGINF((u)) #define DUK_DBLUNION_IS_ANYZERO(u) DUK__DBLUNION_IS_ANYZERO((u)) #define DUK_DBLUNION_IS_POSZERO(u) DUK__DBLUNION_IS_POSZERO((u)) #define DUK_DBLUNION_IS_NEGZERO(u) DUK__DBLUNION_IS_NEGZERO((u)) /* XXX: native 64-bit byteswaps when available */ /* 64-bit byteswap, same operation independent of target endianness. */ #define DUK_DBLUNION_BSWAP64(u) do { \ duk_uint32_t duk__bswaptmp1, duk__bswaptmp2; \ duk__bswaptmp1 = (u)->ui[0]; \ duk__bswaptmp2 = (u)->ui[1]; \ duk__bswaptmp1 = DUK_BSWAP32(duk__bswaptmp1); \ duk__bswaptmp2 = DUK_BSWAP32(duk__bswaptmp2); \ (u)->ui[0] = duk__bswaptmp2; \ (u)->ui[1] = duk__bswaptmp1; \ } while (0) /* Byteswap an IEEE double in the duk_double_union from host to network * order. For a big endian target this is a no-op. */ #if defined(DUK_USE_DOUBLE_LE) #define DUK_DBLUNION_DOUBLE_HTON(u) do { \ duk_uint32_t duk__bswaptmp1, duk__bswaptmp2; \ duk__bswaptmp1 = (u)->ui[0]; \ duk__bswaptmp2 = (u)->ui[1]; \ duk__bswaptmp1 = DUK_BSWAP32(duk__bswaptmp1); \ duk__bswaptmp2 = DUK_BSWAP32(duk__bswaptmp2); \ (u)->ui[0] = duk__bswaptmp2; \ (u)->ui[1] = duk__bswaptmp1; \ } while (0) #elif defined(DUK_USE_DOUBLE_ME) #define DUK_DBLUNION_DOUBLE_HTON(u) do { \ duk_uint32_t duk__bswaptmp1, duk__bswaptmp2; \ duk__bswaptmp1 = (u)->ui[0]; \ duk__bswaptmp2 = (u)->ui[1]; \ duk__bswaptmp1 = DUK_BSWAP32(duk__bswaptmp1); \ duk__bswaptmp2 = DUK_BSWAP32(duk__bswaptmp2); \ (u)->ui[0] = duk__bswaptmp1; \ (u)->ui[1] = duk__bswaptmp2; \ } while (0) #elif defined(DUK_USE_DOUBLE_BE) #define DUK_DBLUNION_DOUBLE_HTON(u) do { } while (0) #else #error internal error, double endianness insane #endif /* Reverse operation is the same. */ #define DUK_DBLUNION_DOUBLE_NTOH(u) DUK_DBLUNION_DOUBLE_HTON((u)) /* Some sign bit helpers. */ #if defined(DUK_USE_64BIT_OPS) #define DUK_DBLUNION_HAS_SIGNBIT(u) (((u)->ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x8000000000000000)) != 0) #define DUK_DBLUNION_GET_SIGNBIT(u) (((u)->ull[DUK_DBL_IDX_ULL0] >> 63U)) #else #define DUK_DBLUNION_HAS_SIGNBIT(u) (((u)->ui[DUK_DBL_IDX_UI0] & 0x80000000UL) != 0) #define DUK_DBLUNION_GET_SIGNBIT(u) (((u)->ui[DUK_DBL_IDX_UI0] >> 31U)) #endif #endif /* DUK_DBLUNION_H_INCLUDED */ /* #include duk_replacements.h */ #if !defined(DUK_REPLACEMENTS_H_INCLUDED) #define DUK_REPLACEMENTS_H_INCLUDED #if !defined(DUK_SINGLE_FILE) #if defined(DUK_USE_COMPUTED_INFINITY) DUK_INTERNAL_DECL double duk_computed_infinity; #endif #if defined(DUK_USE_COMPUTED_NAN) DUK_INTERNAL_DECL double duk_computed_nan; #endif #endif /* !DUK_SINGLE_FILE */ #if defined(DUK_USE_REPL_FPCLASSIFY) DUK_INTERNAL_DECL int duk_repl_fpclassify(double x); #endif #if defined(DUK_USE_REPL_SIGNBIT) DUK_INTERNAL_DECL int duk_repl_signbit(double x); #endif #if defined(DUK_USE_REPL_ISFINITE) DUK_INTERNAL_DECL int duk_repl_isfinite(double x); #endif #if defined(DUK_USE_REPL_ISNAN) DUK_INTERNAL_DECL int duk_repl_isnan(double x); #endif #if defined(DUK_USE_REPL_ISINF) DUK_INTERNAL_DECL int duk_repl_isinf(double x); #endif #endif /* DUK_REPLACEMENTS_H_INCLUDED */ /* #include duk_jmpbuf.h */ /* * Wrapper for jmp_buf. * * This is used because jmp_buf is an array type for backward compatibility. * Wrapping jmp_buf in a struct makes pointer references, sizeof, etc, * behave more intuitively. * * http://en.wikipedia.org/wiki/Setjmp.h#Member_types */ #if !defined(DUK_JMPBUF_H_INCLUDED) #define DUK_JMPBUF_H_INCLUDED #if defined(DUK_USE_CPP_EXCEPTIONS) struct duk_jmpbuf { duk_small_int_t dummy; /* unused */ }; #else struct duk_jmpbuf { DUK_JMPBUF_TYPE jb; }; #endif #endif /* DUK_JMPBUF_H_INCLUDED */ /* #include duk_exception.h */ /* * Exceptions for Duktape internal throws when C++ exceptions are used * for long control transfers. */ #if !defined(DUK_EXCEPTION_H_INCLUDED) #define DUK_EXCEPTION_H_INCLUDED #if defined(DUK_USE_CPP_EXCEPTIONS) /* Internal exception used as a setjmp-longjmp replacement. User code should * NEVER see or catch this exception, so it doesn't inherit from any base * class which should minimize the chance of user code accidentally catching * the exception. */ class duk_internal_exception { /* intentionally empty */ }; /* Fatal error, thrown as a specific C++ exception with C++ exceptions * enabled. It is unsafe to continue; doing so may cause crashes or memory * leaks. This is intended to be either uncaught, or caught by user code * aware of the "unsafe to continue" semantics. */ class duk_fatal_exception : public virtual std::runtime_error { public: duk_fatal_exception(const char *message) : std::runtime_error(message) {} }; #endif #endif /* DUK_EXCEPTION_H_INCLUDED */ /* #include duk_forwdecl.h */ /* * Forward declarations for all Duktape structures. */ #if !defined(DUK_FORWDECL_H_INCLUDED) #define DUK_FORWDECL_H_INCLUDED /* * Forward declarations */ #if defined(DUK_USE_CPP_EXCEPTIONS) class duk_internal_exception; #else struct duk_jmpbuf; #endif /* duk_tval intentionally skipped */ struct duk_heaphdr; struct duk_heaphdr_string; struct duk_harray; struct duk_hstring; struct duk_hstring_external; struct duk_hobject; struct duk_hcompfunc; struct duk_hnatfunc; struct duk_hboundfunc; struct duk_hthread; struct duk_hbufobj; struct duk_hdecenv; struct duk_hobjenv; struct duk_hproxy; struct duk_hbuffer; struct duk_hbuffer_fixed; struct duk_hbuffer_dynamic; struct duk_hbuffer_external; struct duk_propaccessor; union duk_propvalue; struct duk_propdesc; struct duk_heap; struct duk_breakpoint; struct duk_activation; struct duk_catcher; struct duk_ljstate; struct duk_strcache_entry; struct duk_litcache_entry; struct duk_strtab_entry; #if defined(DUK_USE_DEBUG) struct duk_fixedbuffer; #endif struct duk_bitdecoder_ctx; struct duk_bitencoder_ctx; struct duk_bufwriter_ctx; struct duk_token; struct duk_re_token; struct duk_lexer_point; struct duk_lexer_ctx; struct duk_lexer_codepoint; struct duk_compiler_instr; struct duk_compiler_func; struct duk_compiler_ctx; struct duk_re_matcher_ctx; struct duk_re_compiler_ctx; #if defined(DUK_USE_CPP_EXCEPTIONS) /* no typedef */ #else typedef struct duk_jmpbuf duk_jmpbuf; #endif /* duk_tval intentionally skipped */ typedef struct duk_heaphdr duk_heaphdr; typedef struct duk_heaphdr_string duk_heaphdr_string; typedef struct duk_harray duk_harray; typedef struct duk_hstring duk_hstring; typedef struct duk_hstring_external duk_hstring_external; typedef struct duk_hobject duk_hobject; typedef struct duk_hcompfunc duk_hcompfunc; typedef struct duk_hnatfunc duk_hnatfunc; typedef struct duk_hboundfunc duk_hboundfunc; typedef struct duk_hthread duk_hthread; typedef struct duk_hbufobj duk_hbufobj; typedef struct duk_hdecenv duk_hdecenv; typedef struct duk_hobjenv duk_hobjenv; typedef struct duk_hproxy duk_hproxy; typedef struct duk_hbuffer duk_hbuffer; typedef struct duk_hbuffer_fixed duk_hbuffer_fixed; typedef struct duk_hbuffer_dynamic duk_hbuffer_dynamic; typedef struct duk_hbuffer_external duk_hbuffer_external; typedef struct duk_propaccessor duk_propaccessor; typedef union duk_propvalue duk_propvalue; typedef struct duk_propdesc duk_propdesc; typedef struct duk_heap duk_heap; typedef struct duk_breakpoint duk_breakpoint; typedef struct duk_activation duk_activation; typedef struct duk_catcher duk_catcher; typedef struct duk_ljstate duk_ljstate; typedef struct duk_strcache_entry duk_strcache_entry; typedef struct duk_litcache_entry duk_litcache_entry; typedef struct duk_strtab_entry duk_strtab_entry; #if defined(DUK_USE_DEBUG) typedef struct duk_fixedbuffer duk_fixedbuffer; #endif typedef struct duk_bitdecoder_ctx duk_bitdecoder_ctx; typedef struct duk_bitencoder_ctx duk_bitencoder_ctx; typedef struct duk_bufwriter_ctx duk_bufwriter_ctx; typedef struct duk_token duk_token; typedef struct duk_re_token duk_re_token; typedef struct duk_lexer_point duk_lexer_point; typedef struct duk_lexer_ctx duk_lexer_ctx; typedef struct duk_lexer_codepoint duk_lexer_codepoint; typedef struct duk_compiler_instr duk_compiler_instr; typedef struct duk_compiler_func duk_compiler_func; typedef struct duk_compiler_ctx duk_compiler_ctx; typedef struct duk_re_matcher_ctx duk_re_matcher_ctx; typedef struct duk_re_compiler_ctx duk_re_compiler_ctx; #endif /* DUK_FORWDECL_H_INCLUDED */ /* #include duk_tval.h */ /* * Tagged type definition (duk_tval) and accessor macros. * * Access all fields through the accessor macros, as the representation * is quite tricky. * * There are two packed type alternatives: an 8-byte representation * based on an IEEE double (preferred for compactness), and a 12-byte * representation (portability). The latter is needed also in e.g. * 64-bit environments (it usually pads to 16 bytes per value). * * Selecting the tagged type format involves many trade-offs (memory * use, size and performance of generated code, portability, etc). * * NB: because macro arguments are often expressions, macros should * avoid evaluating their argument more than once. */ #if !defined(DUK_TVAL_H_INCLUDED) #define DUK_TVAL_H_INCLUDED /* sanity */ #if !defined(DUK_USE_DOUBLE_LE) && !defined(DUK_USE_DOUBLE_ME) && !defined(DUK_USE_DOUBLE_BE) #error unsupported: cannot determine byte order variant #endif #if defined(DUK_USE_PACKED_TVAL) /* ======================================================================== */ /* * Packed 8-byte representation */ /* use duk_double_union as duk_tval directly */ typedef union duk_double_union duk_tval; typedef struct { duk_uint16_t a; duk_uint16_t b; duk_uint16_t c; duk_uint16_t d; } duk_tval_unused; /* tags */ #define DUK_TAG_NORMALIZED_NAN 0x7ff8UL /* the NaN variant we use */ /* avoid tag 0xfff0, no risk of confusion with negative infinity */ #define DUK_TAG_MIN 0xfff1UL #if defined(DUK_USE_FASTINT) #define DUK_TAG_FASTINT 0xfff1UL /* embed: integer value */ #endif #define DUK_TAG_UNUSED 0xfff2UL /* marker; not actual tagged value */ #define DUK_TAG_UNDEFINED 0xfff3UL /* embed: nothing */ #define DUK_TAG_NULL 0xfff4UL /* embed: nothing */ #define DUK_TAG_BOOLEAN 0xfff5UL /* embed: 0 or 1 (false or true) */ /* DUK_TAG_NUMBER would logically go here, but it has multiple 'tags' */ #define DUK_TAG_POINTER 0xfff6UL /* embed: void ptr */ #define DUK_TAG_LIGHTFUNC 0xfff7UL /* embed: func ptr */ #define DUK_TAG_STRING 0xfff8UL /* embed: duk_hstring ptr */ #define DUK_TAG_OBJECT 0xfff9UL /* embed: duk_hobject ptr */ #define DUK_TAG_BUFFER 0xfffaUL /* embed: duk_hbuffer ptr */ #define DUK_TAG_MAX 0xfffaUL /* for convenience */ #define DUK_XTAG_BOOLEAN_FALSE 0xfff50000UL #define DUK_XTAG_BOOLEAN_TRUE 0xfff50001UL #define DUK_TVAL_IS_VALID_TAG(tv) \ (DUK_TVAL_GET_TAG((tv)) - DUK_TAG_MIN <= DUK_TAG_MAX - DUK_TAG_MIN) /* DUK_TVAL_UNUSED initializer for duk_tval_unused, works for any endianness. */ #define DUK_TVAL_UNUSED_INITIALIZER() \ { DUK_TAG_UNUSED, DUK_TAG_UNUSED, DUK_TAG_UNUSED, DUK_TAG_UNUSED } /* two casts to avoid gcc warning: "warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]" */ #if defined(DUK_USE_64BIT_OPS) #if defined(DUK_USE_DOUBLE_ME) #define DUK__TVAL_SET_TAGGEDPOINTER(tv,h,tag) do { \ (tv)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) (tag)) << 16) | (((duk_uint64_t) (duk_uint32_t) (h)) << 32); \ } while (0) #else #define DUK__TVAL_SET_TAGGEDPOINTER(tv,h,tag) do { \ (tv)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) (tag)) << 48) | ((duk_uint64_t) (duk_uint32_t) (h)); \ } while (0) #endif #else /* DUK_USE_64BIT_OPS */ #define DUK__TVAL_SET_TAGGEDPOINTER(tv,h,tag) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->ui[DUK_DBL_IDX_UI0] = ((duk_uint32_t) (tag)) << 16; \ duk__tv->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (h); \ } while (0) #endif /* DUK_USE_64BIT_OPS */ #if defined(DUK_USE_64BIT_OPS) /* Double casting for pointer to avoid gcc warning (cast from pointer to integer of different size) */ #if defined(DUK_USE_DOUBLE_ME) #define DUK__TVAL_SET_LIGHTFUNC(tv,fp,flags) do { \ (tv)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) DUK_TAG_LIGHTFUNC) << 16) | \ ((duk_uint64_t) (flags)) | \ (((duk_uint64_t) (duk_uint32_t) (fp)) << 32); \ } while (0) #else #define DUK__TVAL_SET_LIGHTFUNC(tv,fp,flags) do { \ (tv)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) DUK_TAG_LIGHTFUNC) << 48) | \ (((duk_uint64_t) (flags)) << 32) | \ ((duk_uint64_t) (duk_uint32_t) (fp)); \ } while (0) #endif #else /* DUK_USE_64BIT_OPS */ #define DUK__TVAL_SET_LIGHTFUNC(tv,fp,flags) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->ui[DUK_DBL_IDX_UI0] = (((duk_uint32_t) DUK_TAG_LIGHTFUNC) << 16) | ((duk_uint32_t) (flags)); \ duk__tv->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (fp); \ } while (0) #endif /* DUK_USE_64BIT_OPS */ #if defined(DUK_USE_FASTINT) /* Note: masking is done for 'i' to deal with negative numbers correctly */ #if defined(DUK_USE_DOUBLE_ME) #define DUK__TVAL_SET_I48(tv,i) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->ui[DUK_DBL_IDX_UI0] = ((duk_uint32_t) DUK_TAG_FASTINT) << 16 | (((duk_uint32_t) ((i) >> 32)) & 0x0000ffffUL); \ duk__tv->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (i); \ } while (0) #define DUK__TVAL_SET_U32(tv,i) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->ui[DUK_DBL_IDX_UI0] = ((duk_uint32_t) DUK_TAG_FASTINT) << 16; \ duk__tv->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (i); \ } while (0) #else #define DUK__TVAL_SET_I48(tv,i) do { \ (tv)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) DUK_TAG_FASTINT) << 48) | (((duk_uint64_t) (i)) & DUK_U64_CONSTANT(0x0000ffffffffffff)); \ } while (0) #define DUK__TVAL_SET_U32(tv,i) do { \ (tv)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) DUK_TAG_FASTINT) << 48) | (duk_uint64_t) (i); \ } while (0) #endif /* This needs to go through a cast because sign extension is needed. */ #define DUK__TVAL_SET_I32(tv,i) do { \ duk_int64_t duk__tmp = (duk_int64_t) (i); \ DUK_TVAL_SET_I48((tv), duk__tmp); \ } while (0) /* XXX: Clumsy sign extend and masking of 16 topmost bits. */ #if defined(DUK_USE_DOUBLE_ME) #define DUK__TVAL_GET_FASTINT(tv) (((duk_int64_t) ((((duk_uint64_t) (tv)->ui[DUK_DBL_IDX_UI0]) << 32) | ((duk_uint64_t) (tv)->ui[DUK_DBL_IDX_UI1]))) << 16 >> 16) #else #define DUK__TVAL_GET_FASTINT(tv) ((((duk_int64_t) (tv)->ull[DUK_DBL_IDX_ULL0]) << 16) >> 16) #endif #define DUK__TVAL_GET_FASTINT_U32(tv) ((tv)->ui[DUK_DBL_IDX_UI1]) #define DUK__TVAL_GET_FASTINT_I32(tv) ((duk_int32_t) (tv)->ui[DUK_DBL_IDX_UI1]) #endif /* DUK_USE_FASTINT */ #define DUK_TVAL_SET_UNDEFINED(tv) do { \ (tv)->us[DUK_DBL_IDX_US0] = (duk_uint16_t) DUK_TAG_UNDEFINED; \ } while (0) #define DUK_TVAL_SET_UNUSED(tv) do { \ (tv)->us[DUK_DBL_IDX_US0] = (duk_uint16_t) DUK_TAG_UNUSED; \ } while (0) #define DUK_TVAL_SET_NULL(tv) do { \ (tv)->us[DUK_DBL_IDX_US0] = (duk_uint16_t) DUK_TAG_NULL; \ } while (0) #define DUK_TVAL_SET_BOOLEAN(tv,val) DUK_DBLUNION_SET_HIGH32((tv), (((duk_uint32_t) DUK_TAG_BOOLEAN) << 16) | ((duk_uint32_t) (val))) #define DUK_TVAL_SET_NAN(tv) DUK_DBLUNION_SET_NAN_FULL((tv)) /* Assumes that caller has normalized NaNs, otherwise trouble ahead. */ #if defined(DUK_USE_FASTINT) #define DUK_TVAL_SET_DOUBLE(tv,d) do { \ duk_double_t duk__dblval; \ duk__dblval = (d); \ DUK_ASSERT_DOUBLE_IS_NORMALIZED(duk__dblval); \ DUK_DBLUNION_SET_DOUBLE((tv), duk__dblval); \ } while (0) #define DUK_TVAL_SET_I48(tv,i) DUK__TVAL_SET_I48((tv), (i)) #define DUK_TVAL_SET_I32(tv,i) DUK__TVAL_SET_I32((tv), (i)) #define DUK_TVAL_SET_U32(tv,i) DUK__TVAL_SET_U32((tv), (i)) #define DUK_TVAL_SET_NUMBER_CHKFAST_FAST(tv,d) duk_tval_set_number_chkfast_fast((tv), (d)) #define DUK_TVAL_SET_NUMBER_CHKFAST_SLOW(tv,d) duk_tval_set_number_chkfast_slow((tv), (d)) #define DUK_TVAL_SET_NUMBER(tv,d) DUK_TVAL_SET_DOUBLE((tv), (d)) #define DUK_TVAL_CHKFAST_INPLACE_FAST(tv) do { \ duk_tval *duk__tv; \ duk_double_t duk__d; \ duk__tv = (tv); \ if (DUK_TVAL_IS_DOUBLE(duk__tv)) { \ duk__d = DUK_TVAL_GET_DOUBLE(duk__tv); \ DUK_TVAL_SET_NUMBER_CHKFAST_FAST(duk__tv, duk__d); \ } \ } while (0) #define DUK_TVAL_CHKFAST_INPLACE_SLOW(tv) do { \ duk_tval *duk__tv; \ duk_double_t duk__d; \ duk__tv = (tv); \ if (DUK_TVAL_IS_DOUBLE(duk__tv)) { \ duk__d = DUK_TVAL_GET_DOUBLE(duk__tv); \ DUK_TVAL_SET_NUMBER_CHKFAST_SLOW(duk__tv, duk__d); \ } \ } while (0) #else /* DUK_USE_FASTINT */ #define DUK_TVAL_SET_DOUBLE(tv,d) do { \ duk_double_t duk__dblval; \ duk__dblval = (d); \ DUK_ASSERT_DOUBLE_IS_NORMALIZED(duk__dblval); \ DUK_DBLUNION_SET_DOUBLE((tv), duk__dblval); \ } while (0) #define DUK_TVAL_SET_I48(tv,i) DUK_TVAL_SET_DOUBLE((tv), (duk_double_t) (i)) /* XXX: fast int-to-double */ #define DUK_TVAL_SET_I32(tv,i) DUK_TVAL_SET_DOUBLE((tv), (duk_double_t) (i)) #define DUK_TVAL_SET_U32(tv,i) DUK_TVAL_SET_DOUBLE((tv), (duk_double_t) (i)) #define DUK_TVAL_SET_NUMBER_CHKFAST_FAST(tv,d) DUK_TVAL_SET_DOUBLE((tv), (d)) #define DUK_TVAL_SET_NUMBER_CHKFAST_SLOW(tv,d) DUK_TVAL_SET_DOUBLE((tv), (d)) #define DUK_TVAL_SET_NUMBER(tv,d) DUK_TVAL_SET_DOUBLE((tv), (d)) #define DUK_TVAL_CHKFAST_INPLACE_FAST(tv) do { } while (0) #define DUK_TVAL_CHKFAST_INPLACE_SLOW(tv) do { } while (0) #endif /* DUK_USE_FASTINT */ #define DUK_TVAL_SET_FASTINT(tv,i) DUK_TVAL_SET_I48((tv), (i)) /* alias */ #define DUK_TVAL_SET_LIGHTFUNC(tv,fp,flags) DUK__TVAL_SET_LIGHTFUNC((tv), (fp), (flags)) #define DUK_TVAL_SET_STRING(tv,h) DUK__TVAL_SET_TAGGEDPOINTER((tv), (h), DUK_TAG_STRING) #define DUK_TVAL_SET_OBJECT(tv,h) DUK__TVAL_SET_TAGGEDPOINTER((tv), (h), DUK_TAG_OBJECT) #define DUK_TVAL_SET_BUFFER(tv,h) DUK__TVAL_SET_TAGGEDPOINTER((tv), (h), DUK_TAG_BUFFER) #define DUK_TVAL_SET_POINTER(tv,p) DUK__TVAL_SET_TAGGEDPOINTER((tv), (p), DUK_TAG_POINTER) #define DUK_TVAL_SET_TVAL(tv,x) do { *(tv) = *(x); } while (0) /* getters */ #define DUK_TVAL_GET_BOOLEAN(tv) ((duk_small_uint_t) (tv)->us[DUK_DBL_IDX_US1]) #if defined(DUK_USE_FASTINT) #define DUK_TVAL_GET_DOUBLE(tv) ((tv)->d) #define DUK_TVAL_GET_FASTINT(tv) DUK__TVAL_GET_FASTINT((tv)) #define DUK_TVAL_GET_FASTINT_U32(tv) DUK__TVAL_GET_FASTINT_U32((tv)) #define DUK_TVAL_GET_FASTINT_I32(tv) DUK__TVAL_GET_FASTINT_I32((tv)) #define DUK_TVAL_GET_NUMBER(tv) duk_tval_get_number_packed((tv)) #else #define DUK_TVAL_GET_NUMBER(tv) ((tv)->d) #define DUK_TVAL_GET_DOUBLE(tv) ((tv)->d) #endif #define DUK_TVAL_GET_LIGHTFUNC(tv,out_fp,out_flags) do { \ (out_flags) = (tv)->ui[DUK_DBL_IDX_UI0] & 0xffffUL; \ (out_fp) = (duk_c_function) (tv)->ui[DUK_DBL_IDX_UI1]; \ } while (0) #define DUK_TVAL_GET_LIGHTFUNC_FUNCPTR(tv) ((duk_c_function) ((tv)->ui[DUK_DBL_IDX_UI1])) #define DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv) (((duk_small_uint_t) (tv)->ui[DUK_DBL_IDX_UI0]) & 0xffffUL) #define DUK_TVAL_GET_STRING(tv) ((duk_hstring *) (tv)->vp[DUK_DBL_IDX_VP1]) #define DUK_TVAL_GET_OBJECT(tv) ((duk_hobject *) (tv)->vp[DUK_DBL_IDX_VP1]) #define DUK_TVAL_GET_BUFFER(tv) ((duk_hbuffer *) (tv)->vp[DUK_DBL_IDX_VP1]) #define DUK_TVAL_GET_POINTER(tv) ((void *) (tv)->vp[DUK_DBL_IDX_VP1]) #define DUK_TVAL_GET_HEAPHDR(tv) ((duk_heaphdr *) (tv)->vp[DUK_DBL_IDX_VP1]) /* decoding */ #define DUK_TVAL_GET_TAG(tv) ((duk_small_uint_t) (tv)->us[DUK_DBL_IDX_US0]) #define DUK_TVAL_IS_UNDEFINED(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_UNDEFINED) #define DUK_TVAL_IS_UNUSED(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_UNUSED) #define DUK_TVAL_IS_NULL(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_NULL) #define DUK_TVAL_IS_BOOLEAN(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_BOOLEAN) #define DUK_TVAL_IS_BOOLEAN_TRUE(tv) ((tv)->ui[DUK_DBL_IDX_UI0] == DUK_XTAG_BOOLEAN_TRUE) #define DUK_TVAL_IS_BOOLEAN_FALSE(tv) ((tv)->ui[DUK_DBL_IDX_UI0] == DUK_XTAG_BOOLEAN_FALSE) #define DUK_TVAL_IS_LIGHTFUNC(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_LIGHTFUNC) #define DUK_TVAL_IS_STRING(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_STRING) #define DUK_TVAL_IS_OBJECT(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_OBJECT) #define DUK_TVAL_IS_BUFFER(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_BUFFER) #define DUK_TVAL_IS_POINTER(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_POINTER) #if defined(DUK_USE_FASTINT) /* 0xfff0 is -Infinity */ #define DUK_TVAL_IS_DOUBLE(tv) (DUK_TVAL_GET_TAG((tv)) <= 0xfff0UL) #define DUK_TVAL_IS_FASTINT(tv) (DUK_TVAL_GET_TAG((tv)) == DUK_TAG_FASTINT) #define DUK_TVAL_IS_NUMBER(tv) (DUK_TVAL_GET_TAG((tv)) <= 0xfff1UL) #else #define DUK_TVAL_IS_NUMBER(tv) (DUK_TVAL_GET_TAG((tv)) <= 0xfff0UL) #define DUK_TVAL_IS_DOUBLE(tv) DUK_TVAL_IS_NUMBER((tv)) #endif /* This is performance critical because it appears in every DECREF. */ #define DUK_TVAL_IS_HEAP_ALLOCATED(tv) (DUK_TVAL_GET_TAG((tv)) >= DUK_TAG_STRING) #if defined(DUK_USE_FASTINT) DUK_INTERNAL_DECL duk_double_t duk_tval_get_number_packed(duk_tval *tv); #endif #else /* DUK_USE_PACKED_TVAL */ /* ======================================================================== */ /* * Portable 12-byte representation */ /* Note: not initializing all bytes is normally not an issue: Duktape won't * read or use the uninitialized bytes so valgrind won't issue warnings. * In some special cases a harmless valgrind warning may be issued though. * For example, the DumpHeap debugger command writes out a compiled function's * 'data' area as is, including any uninitialized bytes, which causes a * valgrind warning. */ typedef struct duk_tval_struct duk_tval; struct duk_tval_struct { duk_small_uint_t t; duk_small_uint_t v_extra; union { duk_double_t d; duk_small_int_t i; #if defined(DUK_USE_FASTINT) duk_int64_t fi; /* if present, forces 16-byte duk_tval */ #endif void *voidptr; duk_hstring *hstring; duk_hobject *hobject; duk_hcompfunc *hcompfunc; duk_hnatfunc *hnatfunc; duk_hthread *hthread; duk_hbuffer *hbuffer; duk_heaphdr *heaphdr; duk_c_function lightfunc; } v; }; typedef struct { duk_small_uint_t t; duk_small_uint_t v_extra; /* The rest of the fields don't matter except for debug dumps and such * for which a partial initializer may trigger out-ot-bounds memory * reads. Include a double field which is usually as large or larger * than pointers (not always however). */ duk_double_t d; } duk_tval_unused; #define DUK_TVAL_UNUSED_INITIALIZER() \ { DUK_TAG_UNUSED, 0, 0.0 } #define DUK_TAG_MIN 0 #define DUK_TAG_NUMBER 0 /* DUK_TAG_NUMBER only defined for non-packed duk_tval */ #if defined(DUK_USE_FASTINT) #define DUK_TAG_FASTINT 1 #endif #define DUK_TAG_UNDEFINED 2 #define DUK_TAG_NULL 3 #define DUK_TAG_BOOLEAN 4 #define DUK_TAG_POINTER 5 #define DUK_TAG_LIGHTFUNC 6 #define DUK_TAG_UNUSED 7 /* marker; not actual tagged type */ #define DUK_TAG_STRING 8 /* first heap allocated, match bit boundary */ #define DUK_TAG_OBJECT 9 #define DUK_TAG_BUFFER 10 #define DUK_TAG_MAX 10 #define DUK_TVAL_IS_VALID_TAG(tv) \ (DUK_TVAL_GET_TAG((tv)) - DUK_TAG_MIN <= DUK_TAG_MAX - DUK_TAG_MIN) /* DUK_TAG_NUMBER is intentionally first, as it is the default clause in code * to support the 8-byte representation. Further, it is a non-heap-allocated * type so it should come before DUK_TAG_STRING. Finally, it should not break * the tag value ranges covered by case-clauses in a switch-case. */ /* setters */ #define DUK_TVAL_SET_UNDEFINED(tv) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_UNDEFINED; \ } while (0) #define DUK_TVAL_SET_UNUSED(tv) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_UNUSED; \ } while (0) #define DUK_TVAL_SET_NULL(tv) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_NULL; \ } while (0) #define DUK_TVAL_SET_BOOLEAN(tv,val) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_BOOLEAN; \ duk__tv->v.i = (duk_small_int_t) (val); \ } while (0) #if defined(DUK_USE_FASTINT) #define DUK_TVAL_SET_DOUBLE(tv,val) do { \ duk_tval *duk__tv; \ duk_double_t duk__dblval; \ duk__dblval = (val); \ DUK_ASSERT_DOUBLE_IS_NORMALIZED(duk__dblval); /* nop for unpacked duk_tval */ \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_NUMBER; \ duk__tv->v.d = duk__dblval; \ } while (0) #define DUK_TVAL_SET_I48(tv,val) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_FASTINT; \ duk__tv->v.fi = (val); \ } while (0) #define DUK_TVAL_SET_U32(tv,val) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_FASTINT; \ duk__tv->v.fi = (duk_int64_t) (val); \ } while (0) #define DUK_TVAL_SET_I32(tv,val) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_FASTINT; \ duk__tv->v.fi = (duk_int64_t) (val); \ } while (0) #define DUK_TVAL_SET_NUMBER_CHKFAST_FAST(tv,d) \ duk_tval_set_number_chkfast_fast((tv), (d)) #define DUK_TVAL_SET_NUMBER_CHKFAST_SLOW(tv,d) \ duk_tval_set_number_chkfast_slow((tv), (d)) #define DUK_TVAL_SET_NUMBER(tv,val) \ DUK_TVAL_SET_DOUBLE((tv), (val)) #define DUK_TVAL_CHKFAST_INPLACE_FAST(tv) do { \ duk_tval *duk__tv; \ duk_double_t duk__d; \ duk__tv = (tv); \ if (DUK_TVAL_IS_DOUBLE(duk__tv)) { \ duk__d = DUK_TVAL_GET_DOUBLE(duk__tv); \ DUK_TVAL_SET_NUMBER_CHKFAST_FAST(duk__tv, duk__d); \ } \ } while (0) #define DUK_TVAL_CHKFAST_INPLACE_SLOW(tv) do { \ duk_tval *duk__tv; \ duk_double_t duk__d; \ duk__tv = (tv); \ if (DUK_TVAL_IS_DOUBLE(duk__tv)) { \ duk__d = DUK_TVAL_GET_DOUBLE(duk__tv); \ DUK_TVAL_SET_NUMBER_CHKFAST_SLOW(duk__tv, duk__d); \ } \ } while (0) #else /* DUK_USE_FASTINT */ #define DUK_TVAL_SET_DOUBLE(tv,d) \ DUK_TVAL_SET_NUMBER((tv), (d)) #define DUK_TVAL_SET_I48(tv,val) \ DUK_TVAL_SET_NUMBER((tv), (duk_double_t) (val)) /* XXX: fast int-to-double */ #define DUK_TVAL_SET_U32(tv,val) \ DUK_TVAL_SET_NUMBER((tv), (duk_double_t) (val)) #define DUK_TVAL_SET_I32(tv,val) \ DUK_TVAL_SET_NUMBER((tv), (duk_double_t) (val)) #define DUK_TVAL_SET_NUMBER(tv,val) do { \ duk_tval *duk__tv; \ duk_double_t duk__dblval; \ duk__dblval = (val); \ DUK_ASSERT_DOUBLE_IS_NORMALIZED(duk__dblval); /* nop for unpacked duk_tval */ \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_NUMBER; \ duk__tv->v.d = duk__dblval; \ } while (0) #define DUK_TVAL_SET_NUMBER_CHKFAST_FAST(tv,d) \ DUK_TVAL_SET_NUMBER((tv), (d)) #define DUK_TVAL_SET_NUMBER_CHKFAST_SLOW(tv,d) \ DUK_TVAL_SET_NUMBER((tv), (d)) #define DUK_TVAL_CHKFAST_INPLACE_FAST(tv) do { } while (0) #define DUK_TVAL_CHKFAST_INPLACE_SLOW(tv) do { } while (0) #endif /* DUK_USE_FASTINT */ #define DUK_TVAL_SET_FASTINT(tv,i) \ DUK_TVAL_SET_I48((tv), (i)) /* alias */ #define DUK_TVAL_SET_POINTER(tv,hptr) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_POINTER; \ duk__tv->v.voidptr = (hptr); \ } while (0) #define DUK_TVAL_SET_LIGHTFUNC(tv,fp,flags) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_LIGHTFUNC; \ duk__tv->v_extra = (flags); \ duk__tv->v.lightfunc = (duk_c_function) (fp); \ } while (0) #define DUK_TVAL_SET_STRING(tv,hptr) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_STRING; \ duk__tv->v.hstring = (hptr); \ } while (0) #define DUK_TVAL_SET_OBJECT(tv,hptr) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_OBJECT; \ duk__tv->v.hobject = (hptr); \ } while (0) #define DUK_TVAL_SET_BUFFER(tv,hptr) do { \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_BUFFER; \ duk__tv->v.hbuffer = (hptr); \ } while (0) #define DUK_TVAL_SET_NAN(tv) do { \ /* in non-packed representation we don't care about which NaN is used */ \ duk_tval *duk__tv; \ duk__tv = (tv); \ duk__tv->t = DUK_TAG_NUMBER; \ duk__tv->v.d = DUK_DOUBLE_NAN; \ } while (0) #define DUK_TVAL_SET_TVAL(tv,x) do { *(tv) = *(x); } while (0) /* getters */ #define DUK_TVAL_GET_BOOLEAN(tv) ((duk_small_uint_t) (tv)->v.i) #if defined(DUK_USE_FASTINT) #define DUK_TVAL_GET_DOUBLE(tv) ((tv)->v.d) #define DUK_TVAL_GET_FASTINT(tv) ((tv)->v.fi) #define DUK_TVAL_GET_FASTINT_U32(tv) ((duk_uint32_t) ((tv)->v.fi)) #define DUK_TVAL_GET_FASTINT_I32(tv) ((duk_int32_t) ((tv)->v.fi)) #if 0 #define DUK_TVAL_GET_NUMBER(tv) (DUK_TVAL_IS_FASTINT((tv)) ? \ (duk_double_t) DUK_TVAL_GET_FASTINT((tv)) : \ DUK_TVAL_GET_DOUBLE((tv))) #define DUK_TVAL_GET_NUMBER(tv) duk_tval_get_number_unpacked((tv)) #else /* This seems reasonable overall. */ #define DUK_TVAL_GET_NUMBER(tv) (DUK_TVAL_IS_FASTINT((tv)) ? \ duk_tval_get_number_unpacked_fastint((tv)) : \ DUK_TVAL_GET_DOUBLE((tv))) #endif #else #define DUK_TVAL_GET_NUMBER(tv) ((tv)->v.d) #define DUK_TVAL_GET_DOUBLE(tv) ((tv)->v.d) #endif /* DUK_USE_FASTINT */ #define DUK_TVAL_GET_POINTER(tv) ((tv)->v.voidptr) #define DUK_TVAL_GET_LIGHTFUNC(tv,out_fp,out_flags) do { \ (out_flags) = (duk_uint32_t) (tv)->v_extra; \ (out_fp) = (tv)->v.lightfunc; \ } while (0) #define DUK_TVAL_GET_LIGHTFUNC_FUNCPTR(tv) ((tv)->v.lightfunc) #define DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv) ((duk_small_uint_t) ((tv)->v_extra)) #define DUK_TVAL_GET_STRING(tv) ((tv)->v.hstring) #define DUK_TVAL_GET_OBJECT(tv) ((tv)->v.hobject) #define DUK_TVAL_GET_BUFFER(tv) ((tv)->v.hbuffer) #define DUK_TVAL_GET_HEAPHDR(tv) ((tv)->v.heaphdr) /* decoding */ #define DUK_TVAL_GET_TAG(tv) ((tv)->t) #define DUK_TVAL_IS_UNDEFINED(tv) ((tv)->t == DUK_TAG_UNDEFINED) #define DUK_TVAL_IS_UNUSED(tv) ((tv)->t == DUK_TAG_UNUSED) #define DUK_TVAL_IS_NULL(tv) ((tv)->t == DUK_TAG_NULL) #define DUK_TVAL_IS_BOOLEAN(tv) ((tv)->t == DUK_TAG_BOOLEAN) #define DUK_TVAL_IS_BOOLEAN_TRUE(tv) (((tv)->t == DUK_TAG_BOOLEAN) && ((tv)->v.i != 0)) #define DUK_TVAL_IS_BOOLEAN_FALSE(tv) (((tv)->t == DUK_TAG_BOOLEAN) && ((tv)->v.i == 0)) #if defined(DUK_USE_FASTINT) #define DUK_TVAL_IS_DOUBLE(tv) ((tv)->t == DUK_TAG_NUMBER) #define DUK_TVAL_IS_FASTINT(tv) ((tv)->t == DUK_TAG_FASTINT) #define DUK_TVAL_IS_NUMBER(tv) ((tv)->t == DUK_TAG_NUMBER || \ (tv)->t == DUK_TAG_FASTINT) #else #define DUK_TVAL_IS_NUMBER(tv) ((tv)->t == DUK_TAG_NUMBER) #define DUK_TVAL_IS_DOUBLE(tv) DUK_TVAL_IS_NUMBER((tv)) #endif /* DUK_USE_FASTINT */ #define DUK_TVAL_IS_POINTER(tv) ((tv)->t == DUK_TAG_POINTER) #define DUK_TVAL_IS_LIGHTFUNC(tv) ((tv)->t == DUK_TAG_LIGHTFUNC) #define DUK_TVAL_IS_STRING(tv) ((tv)->t == DUK_TAG_STRING) #define DUK_TVAL_IS_OBJECT(tv) ((tv)->t == DUK_TAG_OBJECT) #define DUK_TVAL_IS_BUFFER(tv) ((tv)->t == DUK_TAG_BUFFER) /* This is performance critical because it's needed for every DECREF. * Take advantage of the fact that the first heap allocated tag is 8, * so that bit 3 is set for all heap allocated tags (and never set for * non-heap-allocated tags). */ #if 0 #define DUK_TVAL_IS_HEAP_ALLOCATED(tv) ((tv)->t >= DUK_TAG_STRING) #endif #define DUK_TVAL_IS_HEAP_ALLOCATED(tv) ((tv)->t & 0x08) #if defined(DUK_USE_FASTINT) #if 0 DUK_INTERNAL_DECL duk_double_t duk_tval_get_number_unpacked(duk_tval *tv); #endif DUK_INTERNAL_DECL DUK_INLINE duk_double_t duk_tval_get_number_unpacked_fastint(duk_tval *tv); #endif #endif /* DUK_USE_PACKED_TVAL */ /* * Convenience (independent of representation) */ #define DUK_TVAL_SET_BOOLEAN_TRUE(tv) DUK_TVAL_SET_BOOLEAN((tv), 1) #define DUK_TVAL_SET_BOOLEAN_FALSE(tv) DUK_TVAL_SET_BOOLEAN((tv), 0) #define DUK_TVAL_STRING_IS_SYMBOL(tv) \ DUK_HSTRING_HAS_SYMBOL(DUK_TVAL_GET_STRING((tv))) /* Lightfunc flags packing and unpacking. */ /* Sign extend: 0x0000##00 -> 0x##000000 -> sign extend to 0xssssss##. * Avoid signed shifts due to portability limitations. */ #define DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags) \ ((duk_int32_t) (duk_int8_t) (((duk_uint16_t) (lf_flags)) >> 8)) #define DUK_LFUNC_FLAGS_GET_LENGTH(lf_flags) \ (((lf_flags) >> 4) & 0x0fU) #define DUK_LFUNC_FLAGS_GET_NARGS(lf_flags) \ ((lf_flags) & 0x0fU) #define DUK_LFUNC_FLAGS_PACK(magic,length,nargs) \ ((((duk_small_uint_t) (magic)) & 0xffU) << 8) | ((length) << 4) | (nargs) #define DUK_LFUNC_NARGS_VARARGS 0x0f /* varargs marker */ #define DUK_LFUNC_NARGS_MIN 0x00 #define DUK_LFUNC_NARGS_MAX 0x0e /* max, excl. varargs marker */ #define DUK_LFUNC_LENGTH_MIN 0x00 #define DUK_LFUNC_LENGTH_MAX 0x0f #define DUK_LFUNC_MAGIC_MIN (-0x80) #define DUK_LFUNC_MAGIC_MAX 0x7f /* fastint constants etc */ #if defined(DUK_USE_FASTINT) #define DUK_FASTINT_MIN (DUK_I64_CONSTANT(-0x800000000000)) #define DUK_FASTINT_MAX (DUK_I64_CONSTANT(0x7fffffffffff)) #define DUK_FASTINT_BITS 48 DUK_INTERNAL_DECL DUK_INLINE void duk_tval_set_number_chkfast_fast(duk_tval *tv, duk_double_t x); DUK_INTERNAL_DECL void duk_tval_set_number_chkfast_slow(duk_tval *tv, duk_double_t x); #endif #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_tval_assert_valid(duk_tval *tv); #define DUK_TVAL_ASSERT_VALID(tv) do { duk_tval_assert_valid((tv)); } while (0) #else #define DUK_TVAL_ASSERT_VALID(tv) do {} while (0) #endif #endif /* DUK_TVAL_H_INCLUDED */ /* #include duk_builtins.h */ /* * Automatically generated by genbuiltins.py, do not edit! */ #if !defined(DUK_BUILTINS_H_INCLUDED) #define DUK_BUILTINS_H_INCLUDED #if defined(DUK_USE_ROM_STRINGS) #error ROM support not enabled, rerun configure.py with --rom-support #else /* DUK_USE_ROM_STRINGS */ #define DUK_STRIDX_UC_UNDEFINED 0 /* 'Undefined' */ #define DUK_HEAP_STRING_UC_UNDEFINED(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_UNDEFINED) #define DUK_HTHREAD_STRING_UC_UNDEFINED(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_UNDEFINED) #define DUK_STRIDX_UC_NULL 1 /* 'Null' */ #define DUK_HEAP_STRING_UC_NULL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_NULL) #define DUK_HTHREAD_STRING_UC_NULL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_NULL) #define DUK_STRIDX_UC_SYMBOL 2 /* 'Symbol' */ #define DUK_HEAP_STRING_UC_SYMBOL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_SYMBOL) #define DUK_HTHREAD_STRING_UC_SYMBOL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_SYMBOL) #define DUK_STRIDX_UC_ARGUMENTS 3 /* 'Arguments' */ #define DUK_HEAP_STRING_UC_ARGUMENTS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_ARGUMENTS) #define DUK_HTHREAD_STRING_UC_ARGUMENTS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_ARGUMENTS) #define DUK_STRIDX_UC_OBJECT 4 /* 'Object' */ #define DUK_HEAP_STRING_UC_OBJECT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_OBJECT) #define DUK_HTHREAD_STRING_UC_OBJECT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_OBJECT) #define DUK_STRIDX_UC_FUNCTION 5 /* 'Function' */ #define DUK_HEAP_STRING_UC_FUNCTION(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_FUNCTION) #define DUK_HTHREAD_STRING_UC_FUNCTION(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_FUNCTION) #define DUK_STRIDX_ARRAY 6 /* 'Array' */ #define DUK_HEAP_STRING_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ARRAY) #define DUK_HTHREAD_STRING_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ARRAY) #define DUK_STRIDX_UC_STRING 7 /* 'String' */ #define DUK_HEAP_STRING_UC_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_STRING) #define DUK_HTHREAD_STRING_UC_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_STRING) #define DUK_STRIDX_UC_BOOLEAN 8 /* 'Boolean' */ #define DUK_HEAP_STRING_UC_BOOLEAN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_BOOLEAN) #define DUK_HTHREAD_STRING_UC_BOOLEAN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_BOOLEAN) #define DUK_STRIDX_UC_NUMBER 9 /* 'Number' */ #define DUK_HEAP_STRING_UC_NUMBER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_NUMBER) #define DUK_HTHREAD_STRING_UC_NUMBER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_NUMBER) #define DUK_STRIDX_DATE 10 /* 'Date' */ #define DUK_HEAP_STRING_DATE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DATE) #define DUK_HTHREAD_STRING_DATE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DATE) #define DUK_STRIDX_REG_EXP 11 /* 'RegExp' */ #define DUK_HEAP_STRING_REG_EXP(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_REG_EXP) #define DUK_HTHREAD_STRING_REG_EXP(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_REG_EXP) #define DUK_STRIDX_UC_ERROR 12 /* 'Error' */ #define DUK_HEAP_STRING_UC_ERROR(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_ERROR) #define DUK_HTHREAD_STRING_UC_ERROR(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_ERROR) #define DUK_STRIDX_MATH 13 /* 'Math' */ #define DUK_HEAP_STRING_MATH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MATH) #define DUK_HTHREAD_STRING_MATH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MATH) #define DUK_STRIDX_JSON 14 /* 'JSON' */ #define DUK_HEAP_STRING_JSON(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON) #define DUK_HTHREAD_STRING_JSON(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON) #define DUK_STRIDX_EMPTY_STRING 15 /* '' */ #define DUK_HEAP_STRING_EMPTY_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_EMPTY_STRING) #define DUK_HTHREAD_STRING_EMPTY_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_EMPTY_STRING) #define DUK_STRIDX_ARRAY_BUFFER 16 /* 'ArrayBuffer' */ #define DUK_HEAP_STRING_ARRAY_BUFFER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ARRAY_BUFFER) #define DUK_HTHREAD_STRING_ARRAY_BUFFER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ARRAY_BUFFER) #define DUK_STRIDX_DATA_VIEW 17 /* 'DataView' */ #define DUK_HEAP_STRING_DATA_VIEW(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DATA_VIEW) #define DUK_HTHREAD_STRING_DATA_VIEW(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DATA_VIEW) #define DUK_STRIDX_INT8_ARRAY 18 /* 'Int8Array' */ #define DUK_HEAP_STRING_INT8_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT8_ARRAY) #define DUK_HTHREAD_STRING_INT8_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT8_ARRAY) #define DUK_STRIDX_UINT8_ARRAY 19 /* 'Uint8Array' */ #define DUK_HEAP_STRING_UINT8_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UINT8_ARRAY) #define DUK_HTHREAD_STRING_UINT8_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UINT8_ARRAY) #define DUK_STRIDX_UINT8_CLAMPED_ARRAY 20 /* 'Uint8ClampedArray' */ #define DUK_HEAP_STRING_UINT8_CLAMPED_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UINT8_CLAMPED_ARRAY) #define DUK_HTHREAD_STRING_UINT8_CLAMPED_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UINT8_CLAMPED_ARRAY) #define DUK_STRIDX_INT16_ARRAY 21 /* 'Int16Array' */ #define DUK_HEAP_STRING_INT16_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT16_ARRAY) #define DUK_HTHREAD_STRING_INT16_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT16_ARRAY) #define DUK_STRIDX_UINT16_ARRAY 22 /* 'Uint16Array' */ #define DUK_HEAP_STRING_UINT16_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UINT16_ARRAY) #define DUK_HTHREAD_STRING_UINT16_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UINT16_ARRAY) #define DUK_STRIDX_INT32_ARRAY 23 /* 'Int32Array' */ #define DUK_HEAP_STRING_INT32_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT32_ARRAY) #define DUK_HTHREAD_STRING_INT32_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT32_ARRAY) #define DUK_STRIDX_UINT32_ARRAY 24 /* 'Uint32Array' */ #define DUK_HEAP_STRING_UINT32_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UINT32_ARRAY) #define DUK_HTHREAD_STRING_UINT32_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UINT32_ARRAY) #define DUK_STRIDX_FLOAT32_ARRAY 25 /* 'Float32Array' */ #define DUK_HEAP_STRING_FLOAT32_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FLOAT32_ARRAY) #define DUK_HTHREAD_STRING_FLOAT32_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FLOAT32_ARRAY) #define DUK_STRIDX_FLOAT64_ARRAY 26 /* 'Float64Array' */ #define DUK_HEAP_STRING_FLOAT64_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FLOAT64_ARRAY) #define DUK_HTHREAD_STRING_FLOAT64_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FLOAT64_ARRAY) #define DUK_STRIDX_GLOBAL 27 /* 'global' */ #define DUK_HEAP_STRING_GLOBAL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_GLOBAL) #define DUK_HTHREAD_STRING_GLOBAL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_GLOBAL) #define DUK_STRIDX_OBJ_ENV 28 /* 'ObjEnv' */ #define DUK_HEAP_STRING_OBJ_ENV(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_OBJ_ENV) #define DUK_HTHREAD_STRING_OBJ_ENV(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_OBJ_ENV) #define DUK_STRIDX_DEC_ENV 29 /* 'DecEnv' */ #define DUK_HEAP_STRING_DEC_ENV(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DEC_ENV) #define DUK_HTHREAD_STRING_DEC_ENV(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DEC_ENV) #define DUK_STRIDX_UC_BUFFER 30 /* 'Buffer' */ #define DUK_HEAP_STRING_UC_BUFFER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_BUFFER) #define DUK_HTHREAD_STRING_UC_BUFFER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_BUFFER) #define DUK_STRIDX_UC_POINTER 31 /* 'Pointer' */ #define DUK_HEAP_STRING_UC_POINTER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_POINTER) #define DUK_HTHREAD_STRING_UC_POINTER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_POINTER) #define DUK_STRIDX_UC_THREAD 32 /* 'Thread' */ #define DUK_HEAP_STRING_UC_THREAD(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_THREAD) #define DUK_HTHREAD_STRING_UC_THREAD(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_THREAD) #define DUK_STRIDX_EVAL 33 /* 'eval' */ #define DUK_HEAP_STRING_EVAL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_EVAL) #define DUK_HTHREAD_STRING_EVAL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_EVAL) #define DUK_STRIDX_VALUE 34 /* 'value' */ #define DUK_HEAP_STRING_VALUE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_VALUE) #define DUK_HTHREAD_STRING_VALUE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_VALUE) #define DUK_STRIDX_WRITABLE 35 /* 'writable' */ #define DUK_HEAP_STRING_WRITABLE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WRITABLE) #define DUK_HTHREAD_STRING_WRITABLE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WRITABLE) #define DUK_STRIDX_CONFIGURABLE 36 /* 'configurable' */ #define DUK_HEAP_STRING_CONFIGURABLE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CONFIGURABLE) #define DUK_HTHREAD_STRING_CONFIGURABLE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CONFIGURABLE) #define DUK_STRIDX_ENUMERABLE 37 /* 'enumerable' */ #define DUK_HEAP_STRING_ENUMERABLE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ENUMERABLE) #define DUK_HTHREAD_STRING_ENUMERABLE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ENUMERABLE) #define DUK_STRIDX_JOIN 38 /* 'join' */ #define DUK_HEAP_STRING_JOIN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JOIN) #define DUK_HTHREAD_STRING_JOIN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JOIN) #define DUK_STRIDX_TO_LOCALE_STRING 39 /* 'toLocaleString' */ #define DUK_HEAP_STRING_TO_LOCALE_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_LOCALE_STRING) #define DUK_HTHREAD_STRING_TO_LOCALE_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_LOCALE_STRING) #define DUK_STRIDX_VALUE_OF 40 /* 'valueOf' */ #define DUK_HEAP_STRING_VALUE_OF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_VALUE_OF) #define DUK_HTHREAD_STRING_VALUE_OF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_VALUE_OF) #define DUK_STRIDX_TO_UTC_STRING 41 /* 'toUTCString' */ #define DUK_HEAP_STRING_TO_UTC_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_UTC_STRING) #define DUK_HTHREAD_STRING_TO_UTC_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_UTC_STRING) #define DUK_STRIDX_TO_ISO_STRING 42 /* 'toISOString' */ #define DUK_HEAP_STRING_TO_ISO_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_ISO_STRING) #define DUK_HTHREAD_STRING_TO_ISO_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_ISO_STRING) #define DUK_STRIDX_TO_GMT_STRING 43 /* 'toGMTString' */ #define DUK_HEAP_STRING_TO_GMT_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_GMT_STRING) #define DUK_HTHREAD_STRING_TO_GMT_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_GMT_STRING) #define DUK_STRIDX_SOURCE 44 /* 'source' */ #define DUK_HEAP_STRING_SOURCE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SOURCE) #define DUK_HTHREAD_STRING_SOURCE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SOURCE) #define DUK_STRIDX_IGNORE_CASE 45 /* 'ignoreCase' */ #define DUK_HEAP_STRING_IGNORE_CASE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IGNORE_CASE) #define DUK_HTHREAD_STRING_IGNORE_CASE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IGNORE_CASE) #define DUK_STRIDX_MULTILINE 46 /* 'multiline' */ #define DUK_HEAP_STRING_MULTILINE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MULTILINE) #define DUK_HTHREAD_STRING_MULTILINE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MULTILINE) #define DUK_STRIDX_LAST_INDEX 47 /* 'lastIndex' */ #define DUK_HEAP_STRING_LAST_INDEX(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LAST_INDEX) #define DUK_HTHREAD_STRING_LAST_INDEX(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LAST_INDEX) #define DUK_STRIDX_FLAGS 48 /* 'flags' */ #define DUK_HEAP_STRING_FLAGS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FLAGS) #define DUK_HTHREAD_STRING_FLAGS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FLAGS) #define DUK_STRIDX_INDEX 49 /* 'index' */ #define DUK_HEAP_STRING_INDEX(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INDEX) #define DUK_HTHREAD_STRING_INDEX(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INDEX) #define DUK_STRIDX_PROTOTYPE 50 /* 'prototype' */ #define DUK_HEAP_STRING_PROTOTYPE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PROTOTYPE) #define DUK_HTHREAD_STRING_PROTOTYPE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PROTOTYPE) #define DUK_STRIDX_CONSTRUCTOR 51 /* 'constructor' */ #define DUK_HEAP_STRING_CONSTRUCTOR(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CONSTRUCTOR) #define DUK_HTHREAD_STRING_CONSTRUCTOR(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CONSTRUCTOR) #define DUK_STRIDX_MESSAGE 52 /* 'message' */ #define DUK_HEAP_STRING_MESSAGE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MESSAGE) #define DUK_HTHREAD_STRING_MESSAGE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MESSAGE) #define DUK_STRIDX_LC_BOOLEAN 53 /* 'boolean' */ #define DUK_HEAP_STRING_LC_BOOLEAN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_BOOLEAN) #define DUK_HTHREAD_STRING_LC_BOOLEAN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_BOOLEAN) #define DUK_STRIDX_LC_NUMBER 54 /* 'number' */ #define DUK_HEAP_STRING_LC_NUMBER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_NUMBER) #define DUK_HTHREAD_STRING_LC_NUMBER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_NUMBER) #define DUK_STRIDX_LC_STRING 55 /* 'string' */ #define DUK_HEAP_STRING_LC_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_STRING) #define DUK_HTHREAD_STRING_LC_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_STRING) #define DUK_STRIDX_LC_SYMBOL 56 /* 'symbol' */ #define DUK_HEAP_STRING_LC_SYMBOL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_SYMBOL) #define DUK_HTHREAD_STRING_LC_SYMBOL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_SYMBOL) #define DUK_STRIDX_LC_OBJECT 57 /* 'object' */ #define DUK_HEAP_STRING_LC_OBJECT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_OBJECT) #define DUK_HTHREAD_STRING_LC_OBJECT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_OBJECT) #define DUK_STRIDX_LC_UNDEFINED 58 /* 'undefined' */ #define DUK_HEAP_STRING_LC_UNDEFINED(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_UNDEFINED) #define DUK_HTHREAD_STRING_LC_UNDEFINED(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_UNDEFINED) #define DUK_STRIDX_NAN 59 /* 'NaN' */ #define DUK_HEAP_STRING_NAN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_NAN) #define DUK_HTHREAD_STRING_NAN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_NAN) #define DUK_STRIDX_INFINITY 60 /* 'Infinity' */ #define DUK_HEAP_STRING_INFINITY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INFINITY) #define DUK_HTHREAD_STRING_INFINITY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INFINITY) #define DUK_STRIDX_MINUS_INFINITY 61 /* '-Infinity' */ #define DUK_HEAP_STRING_MINUS_INFINITY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MINUS_INFINITY) #define DUK_HTHREAD_STRING_MINUS_INFINITY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MINUS_INFINITY) #define DUK_STRIDX_MINUS_ZERO 62 /* '-0' */ #define DUK_HEAP_STRING_MINUS_ZERO(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MINUS_ZERO) #define DUK_HTHREAD_STRING_MINUS_ZERO(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MINUS_ZERO) #define DUK_STRIDX_COMMA 63 /* ',' */ #define DUK_HEAP_STRING_COMMA(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_COMMA) #define DUK_HTHREAD_STRING_COMMA(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_COMMA) #define DUK_STRIDX_NEWLINE_4SPACE 64 /* '\n ' */ #define DUK_HEAP_STRING_NEWLINE_4SPACE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_NEWLINE_4SPACE) #define DUK_HTHREAD_STRING_NEWLINE_4SPACE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_NEWLINE_4SPACE) #define DUK_STRIDX_BRACKETED_ELLIPSIS 65 /* '[...]' */ #define DUK_HEAP_STRING_BRACKETED_ELLIPSIS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_BRACKETED_ELLIPSIS) #define DUK_HTHREAD_STRING_BRACKETED_ELLIPSIS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_BRACKETED_ELLIPSIS) #define DUK_STRIDX_INVALID_DATE 66 /* 'Invalid Date' */ #define DUK_HEAP_STRING_INVALID_DATE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INVALID_DATE) #define DUK_HTHREAD_STRING_INVALID_DATE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INVALID_DATE) #define DUK_STRIDX_LC_ARGUMENTS 67 /* 'arguments' */ #define DUK_HEAP_STRING_LC_ARGUMENTS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_ARGUMENTS) #define DUK_HTHREAD_STRING_LC_ARGUMENTS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_ARGUMENTS) #define DUK_STRIDX_CALLEE 68 /* 'callee' */ #define DUK_HEAP_STRING_CALLEE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CALLEE) #define DUK_HTHREAD_STRING_CALLEE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CALLEE) #define DUK_STRIDX_CALLER 69 /* 'caller' */ #define DUK_HEAP_STRING_CALLER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CALLER) #define DUK_HTHREAD_STRING_CALLER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CALLER) #define DUK_STRIDX_APPLY 70 /* 'apply' */ #define DUK_HEAP_STRING_APPLY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_APPLY) #define DUK_HTHREAD_STRING_APPLY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_APPLY) #define DUK_STRIDX_CONSTRUCT 71 /* 'construct' */ #define DUK_HEAP_STRING_CONSTRUCT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CONSTRUCT) #define DUK_HTHREAD_STRING_CONSTRUCT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CONSTRUCT) #define DUK_STRIDX_DELETE_PROPERTY 72 /* 'deleteProperty' */ #define DUK_HEAP_STRING_DELETE_PROPERTY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DELETE_PROPERTY) #define DUK_HTHREAD_STRING_DELETE_PROPERTY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DELETE_PROPERTY) #define DUK_STRIDX_GET 73 /* 'get' */ #define DUK_HEAP_STRING_GET(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_GET) #define DUK_HTHREAD_STRING_GET(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_GET) #define DUK_STRIDX_HAS 74 /* 'has' */ #define DUK_HEAP_STRING_HAS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_HAS) #define DUK_HTHREAD_STRING_HAS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_HAS) #define DUK_STRIDX_OWN_KEYS 75 /* 'ownKeys' */ #define DUK_HEAP_STRING_OWN_KEYS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_OWN_KEYS) #define DUK_HTHREAD_STRING_OWN_KEYS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_OWN_KEYS) #define DUK_STRIDX_WELLKNOWN_SYMBOL_TO_PRIMITIVE 76 /* '\x81Symbol.toPrimitive\xff' */ #define DUK_HEAP_STRING_WELLKNOWN_SYMBOL_TO_PRIMITIVE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WELLKNOWN_SYMBOL_TO_PRIMITIVE) #define DUK_HTHREAD_STRING_WELLKNOWN_SYMBOL_TO_PRIMITIVE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WELLKNOWN_SYMBOL_TO_PRIMITIVE) #define DUK_STRIDX_WELLKNOWN_SYMBOL_HAS_INSTANCE 77 /* '\x81Symbol.hasInstance\xff' */ #define DUK_HEAP_STRING_WELLKNOWN_SYMBOL_HAS_INSTANCE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WELLKNOWN_SYMBOL_HAS_INSTANCE) #define DUK_HTHREAD_STRING_WELLKNOWN_SYMBOL_HAS_INSTANCE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WELLKNOWN_SYMBOL_HAS_INSTANCE) #define DUK_STRIDX_WELLKNOWN_SYMBOL_TO_STRING_TAG 78 /* '\x81Symbol.toStringTag\xff' */ #define DUK_HEAP_STRING_WELLKNOWN_SYMBOL_TO_STRING_TAG(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WELLKNOWN_SYMBOL_TO_STRING_TAG) #define DUK_HTHREAD_STRING_WELLKNOWN_SYMBOL_TO_STRING_TAG(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WELLKNOWN_SYMBOL_TO_STRING_TAG) #define DUK_STRIDX_WELLKNOWN_SYMBOL_IS_CONCAT_SPREADABLE 79 /* '\x81Symbol.isConcatSpreadable\xff' */ #define DUK_HEAP_STRING_WELLKNOWN_SYMBOL_IS_CONCAT_SPREADABLE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WELLKNOWN_SYMBOL_IS_CONCAT_SPREADABLE) #define DUK_HTHREAD_STRING_WELLKNOWN_SYMBOL_IS_CONCAT_SPREADABLE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WELLKNOWN_SYMBOL_IS_CONCAT_SPREADABLE) #define DUK_STRIDX_SET_PROTOTYPE_OF 80 /* 'setPrototypeOf' */ #define DUK_HEAP_STRING_SET_PROTOTYPE_OF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SET_PROTOTYPE_OF) #define DUK_HTHREAD_STRING_SET_PROTOTYPE_OF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SET_PROTOTYPE_OF) #define DUK_STRIDX___PROTO__ 81 /* '__proto__' */ #define DUK_HEAP_STRING___PROTO__(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX___PROTO__) #define DUK_HTHREAD_STRING___PROTO__(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX___PROTO__) #define DUK_STRIDX_TO_STRING 82 /* 'toString' */ #define DUK_HEAP_STRING_TO_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_STRING) #define DUK_HTHREAD_STRING_TO_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_STRING) #define DUK_STRIDX_TO_JSON 83 /* 'toJSON' */ #define DUK_HEAP_STRING_TO_JSON(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_JSON) #define DUK_HTHREAD_STRING_TO_JSON(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_JSON) #define DUK_STRIDX_TYPE 84 /* 'type' */ #define DUK_HEAP_STRING_TYPE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TYPE) #define DUK_HTHREAD_STRING_TYPE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TYPE) #define DUK_STRIDX_DATA 85 /* 'data' */ #define DUK_HEAP_STRING_DATA(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DATA) #define DUK_HTHREAD_STRING_DATA(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DATA) #define DUK_STRIDX_LENGTH 86 /* 'length' */ #define DUK_HEAP_STRING_LENGTH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LENGTH) #define DUK_HTHREAD_STRING_LENGTH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LENGTH) #define DUK_STRIDX_SET 87 /* 'set' */ #define DUK_HEAP_STRING_SET(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SET) #define DUK_HTHREAD_STRING_SET(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SET) #define DUK_STRIDX_STACK 88 /* 'stack' */ #define DUK_HEAP_STRING_STACK(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_STACK) #define DUK_HTHREAD_STRING_STACK(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_STACK) #define DUK_STRIDX_PC 89 /* 'pc' */ #define DUK_HEAP_STRING_PC(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PC) #define DUK_HTHREAD_STRING_PC(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PC) #define DUK_STRIDX_LINE_NUMBER 90 /* 'lineNumber' */ #define DUK_HEAP_STRING_LINE_NUMBER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LINE_NUMBER) #define DUK_HTHREAD_STRING_LINE_NUMBER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LINE_NUMBER) #define DUK_STRIDX_INT_TRACEDATA 91 /* '\x82Tracedata' */ #define DUK_HEAP_STRING_INT_TRACEDATA(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_TRACEDATA) #define DUK_HTHREAD_STRING_INT_TRACEDATA(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_TRACEDATA) #define DUK_STRIDX_NAME 92 /* 'name' */ #define DUK_HEAP_STRING_NAME(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_NAME) #define DUK_HTHREAD_STRING_NAME(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_NAME) #define DUK_STRIDX_FILE_NAME 93 /* 'fileName' */ #define DUK_HEAP_STRING_FILE_NAME(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FILE_NAME) #define DUK_HTHREAD_STRING_FILE_NAME(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FILE_NAME) #define DUK_STRIDX_LC_POINTER 94 /* 'pointer' */ #define DUK_HEAP_STRING_LC_POINTER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_POINTER) #define DUK_HTHREAD_STRING_LC_POINTER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_POINTER) #define DUK_STRIDX_INT_TARGET 95 /* '\x82Target' */ #define DUK_HEAP_STRING_INT_TARGET(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_TARGET) #define DUK_HTHREAD_STRING_INT_TARGET(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_TARGET) #define DUK_STRIDX_INT_NEXT 96 /* '\x82Next' */ #define DUK_HEAP_STRING_INT_NEXT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_NEXT) #define DUK_HTHREAD_STRING_INT_NEXT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_NEXT) #define DUK_STRIDX_INT_BYTECODE 97 /* '\x82Bytecode' */ #define DUK_HEAP_STRING_INT_BYTECODE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_BYTECODE) #define DUK_HTHREAD_STRING_INT_BYTECODE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_BYTECODE) #define DUK_STRIDX_INT_FORMALS 98 /* '\x82Formals' */ #define DUK_HEAP_STRING_INT_FORMALS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_FORMALS) #define DUK_HTHREAD_STRING_INT_FORMALS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_FORMALS) #define DUK_STRIDX_INT_VARMAP 99 /* '\x82Varmap' */ #define DUK_HEAP_STRING_INT_VARMAP(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_VARMAP) #define DUK_HTHREAD_STRING_INT_VARMAP(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_VARMAP) #define DUK_STRIDX_INT_SOURCE 100 /* '\x82Source' */ #define DUK_HEAP_STRING_INT_SOURCE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_SOURCE) #define DUK_HTHREAD_STRING_INT_SOURCE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_SOURCE) #define DUK_STRIDX_INT_PC2LINE 101 /* '\x82Pc2line' */ #define DUK_HEAP_STRING_INT_PC2LINE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_PC2LINE) #define DUK_HTHREAD_STRING_INT_PC2LINE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_PC2LINE) #define DUK_STRIDX_INT_MAP 102 /* '\x82Map' */ #define DUK_HEAP_STRING_INT_MAP(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_MAP) #define DUK_HTHREAD_STRING_INT_MAP(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_MAP) #define DUK_STRIDX_INT_VARENV 103 /* '\x82Varenv' */ #define DUK_HEAP_STRING_INT_VARENV(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_VARENV) #define DUK_HTHREAD_STRING_INT_VARENV(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_VARENV) #define DUK_STRIDX_INT_FINALIZER 104 /* '\x82Finalizer' */ #define DUK_HEAP_STRING_INT_FINALIZER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_FINALIZER) #define DUK_HTHREAD_STRING_INT_FINALIZER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_FINALIZER) #define DUK_STRIDX_INT_VALUE 105 /* '\x82Value' */ #define DUK_HEAP_STRING_INT_VALUE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_VALUE) #define DUK_HTHREAD_STRING_INT_VALUE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_VALUE) #define DUK_STRIDX_COMPILE 106 /* 'compile' */ #define DUK_HEAP_STRING_COMPILE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_COMPILE) #define DUK_HTHREAD_STRING_COMPILE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_COMPILE) #define DUK_STRIDX_INPUT 107 /* 'input' */ #define DUK_HEAP_STRING_INPUT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INPUT) #define DUK_HTHREAD_STRING_INPUT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INPUT) #define DUK_STRIDX_ERR_CREATE 108 /* 'errCreate' */ #define DUK_HEAP_STRING_ERR_CREATE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ERR_CREATE) #define DUK_HTHREAD_STRING_ERR_CREATE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ERR_CREATE) #define DUK_STRIDX_ERR_THROW 109 /* 'errThrow' */ #define DUK_HEAP_STRING_ERR_THROW(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ERR_THROW) #define DUK_HTHREAD_STRING_ERR_THROW(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ERR_THROW) #define DUK_STRIDX_ENV 110 /* 'env' */ #define DUK_HEAP_STRING_ENV(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ENV) #define DUK_HTHREAD_STRING_ENV(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ENV) #define DUK_STRIDX_HEX 111 /* 'hex' */ #define DUK_HEAP_STRING_HEX(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_HEX) #define DUK_HTHREAD_STRING_HEX(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_HEX) #define DUK_STRIDX_BASE64 112 /* 'base64' */ #define DUK_HEAP_STRING_BASE64(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_BASE64) #define DUK_HTHREAD_STRING_BASE64(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_BASE64) #define DUK_STRIDX_JX 113 /* 'jx' */ #define DUK_HEAP_STRING_JX(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JX) #define DUK_HTHREAD_STRING_JX(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JX) #define DUK_STRIDX_JC 114 /* 'jc' */ #define DUK_HEAP_STRING_JC(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JC) #define DUK_HTHREAD_STRING_JC(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JC) #define DUK_STRIDX_JSON_EXT_UNDEFINED 115 /* '{"_undef":true}' */ #define DUK_HEAP_STRING_JSON_EXT_UNDEFINED(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_UNDEFINED) #define DUK_HTHREAD_STRING_JSON_EXT_UNDEFINED(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_UNDEFINED) #define DUK_STRIDX_JSON_EXT_NAN 116 /* '{"_nan":true}' */ #define DUK_HEAP_STRING_JSON_EXT_NAN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_NAN) #define DUK_HTHREAD_STRING_JSON_EXT_NAN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_NAN) #define DUK_STRIDX_JSON_EXT_POSINF 117 /* '{"_inf":true}' */ #define DUK_HEAP_STRING_JSON_EXT_POSINF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_POSINF) #define DUK_HTHREAD_STRING_JSON_EXT_POSINF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_POSINF) #define DUK_STRIDX_JSON_EXT_NEGINF 118 /* '{"_ninf":true}' */ #define DUK_HEAP_STRING_JSON_EXT_NEGINF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_NEGINF) #define DUK_HTHREAD_STRING_JSON_EXT_NEGINF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_NEGINF) #define DUK_STRIDX_JSON_EXT_FUNCTION1 119 /* '{"_func":true}' */ #define DUK_HEAP_STRING_JSON_EXT_FUNCTION1(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_FUNCTION1) #define DUK_HTHREAD_STRING_JSON_EXT_FUNCTION1(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_FUNCTION1) #define DUK_STRIDX_JSON_EXT_FUNCTION2 120 /* '{_func:true}' */ #define DUK_HEAP_STRING_JSON_EXT_FUNCTION2(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_FUNCTION2) #define DUK_HTHREAD_STRING_JSON_EXT_FUNCTION2(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_FUNCTION2) #define DUK_STRIDX_BREAK 121 /* 'break' */ #define DUK_HEAP_STRING_BREAK(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_BREAK) #define DUK_HTHREAD_STRING_BREAK(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_BREAK) #define DUK_STRIDX_CASE 122 /* 'case' */ #define DUK_HEAP_STRING_CASE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CASE) #define DUK_HTHREAD_STRING_CASE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CASE) #define DUK_STRIDX_CATCH 123 /* 'catch' */ #define DUK_HEAP_STRING_CATCH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CATCH) #define DUK_HTHREAD_STRING_CATCH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CATCH) #define DUK_STRIDX_CONTINUE 124 /* 'continue' */ #define DUK_HEAP_STRING_CONTINUE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CONTINUE) #define DUK_HTHREAD_STRING_CONTINUE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CONTINUE) #define DUK_STRIDX_DEBUGGER 125 /* 'debugger' */ #define DUK_HEAP_STRING_DEBUGGER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DEBUGGER) #define DUK_HTHREAD_STRING_DEBUGGER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DEBUGGER) #define DUK_STRIDX_DEFAULT 126 /* 'default' */ #define DUK_HEAP_STRING_DEFAULT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DEFAULT) #define DUK_HTHREAD_STRING_DEFAULT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DEFAULT) #define DUK_STRIDX_DELETE 127 /* 'delete' */ #define DUK_HEAP_STRING_DELETE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DELETE) #define DUK_HTHREAD_STRING_DELETE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DELETE) #define DUK_STRIDX_DO 128 /* 'do' */ #define DUK_HEAP_STRING_DO(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DO) #define DUK_HTHREAD_STRING_DO(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DO) #define DUK_STRIDX_ELSE 129 /* 'else' */ #define DUK_HEAP_STRING_ELSE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ELSE) #define DUK_HTHREAD_STRING_ELSE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ELSE) #define DUK_STRIDX_FINALLY 130 /* 'finally' */ #define DUK_HEAP_STRING_FINALLY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FINALLY) #define DUK_HTHREAD_STRING_FINALLY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FINALLY) #define DUK_STRIDX_FOR 131 /* 'for' */ #define DUK_HEAP_STRING_FOR(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FOR) #define DUK_HTHREAD_STRING_FOR(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FOR) #define DUK_STRIDX_LC_FUNCTION 132 /* 'function' */ #define DUK_HEAP_STRING_LC_FUNCTION(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_FUNCTION) #define DUK_HTHREAD_STRING_LC_FUNCTION(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_FUNCTION) #define DUK_STRIDX_IF 133 /* 'if' */ #define DUK_HEAP_STRING_IF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IF) #define DUK_HTHREAD_STRING_IF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IF) #define DUK_STRIDX_IN 134 /* 'in' */ #define DUK_HEAP_STRING_IN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IN) #define DUK_HTHREAD_STRING_IN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IN) #define DUK_STRIDX_INSTANCEOF 135 /* 'instanceof' */ #define DUK_HEAP_STRING_INSTANCEOF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INSTANCEOF) #define DUK_HTHREAD_STRING_INSTANCEOF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INSTANCEOF) #define DUK_STRIDX_NEW 136 /* 'new' */ #define DUK_HEAP_STRING_NEW(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_NEW) #define DUK_HTHREAD_STRING_NEW(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_NEW) #define DUK_STRIDX_RETURN 137 /* 'return' */ #define DUK_HEAP_STRING_RETURN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_RETURN) #define DUK_HTHREAD_STRING_RETURN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_RETURN) #define DUK_STRIDX_SWITCH 138 /* 'switch' */ #define DUK_HEAP_STRING_SWITCH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SWITCH) #define DUK_HTHREAD_STRING_SWITCH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SWITCH) #define DUK_STRIDX_THIS 139 /* 'this' */ #define DUK_HEAP_STRING_THIS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_THIS) #define DUK_HTHREAD_STRING_THIS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_THIS) #define DUK_STRIDX_THROW 140 /* 'throw' */ #define DUK_HEAP_STRING_THROW(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_THROW) #define DUK_HTHREAD_STRING_THROW(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_THROW) #define DUK_STRIDX_TRY 141 /* 'try' */ #define DUK_HEAP_STRING_TRY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TRY) #define DUK_HTHREAD_STRING_TRY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TRY) #define DUK_STRIDX_TYPEOF 142 /* 'typeof' */ #define DUK_HEAP_STRING_TYPEOF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TYPEOF) #define DUK_HTHREAD_STRING_TYPEOF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TYPEOF) #define DUK_STRIDX_VAR 143 /* 'var' */ #define DUK_HEAP_STRING_VAR(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_VAR) #define DUK_HTHREAD_STRING_VAR(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_VAR) #define DUK_STRIDX_CONST 144 /* 'const' */ #define DUK_HEAP_STRING_CONST(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CONST) #define DUK_HTHREAD_STRING_CONST(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CONST) #define DUK_STRIDX_VOID 145 /* 'void' */ #define DUK_HEAP_STRING_VOID(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_VOID) #define DUK_HTHREAD_STRING_VOID(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_VOID) #define DUK_STRIDX_WHILE 146 /* 'while' */ #define DUK_HEAP_STRING_WHILE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WHILE) #define DUK_HTHREAD_STRING_WHILE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WHILE) #define DUK_STRIDX_WITH 147 /* 'with' */ #define DUK_HEAP_STRING_WITH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WITH) #define DUK_HTHREAD_STRING_WITH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WITH) #define DUK_STRIDX_CLASS 148 /* 'class' */ #define DUK_HEAP_STRING_CLASS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CLASS) #define DUK_HTHREAD_STRING_CLASS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CLASS) #define DUK_STRIDX_ENUM 149 /* 'enum' */ #define DUK_HEAP_STRING_ENUM(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ENUM) #define DUK_HTHREAD_STRING_ENUM(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ENUM) #define DUK_STRIDX_EXPORT 150 /* 'export' */ #define DUK_HEAP_STRING_EXPORT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_EXPORT) #define DUK_HTHREAD_STRING_EXPORT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_EXPORT) #define DUK_STRIDX_EXTENDS 151 /* 'extends' */ #define DUK_HEAP_STRING_EXTENDS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_EXTENDS) #define DUK_HTHREAD_STRING_EXTENDS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_EXTENDS) #define DUK_STRIDX_IMPORT 152 /* 'import' */ #define DUK_HEAP_STRING_IMPORT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IMPORT) #define DUK_HTHREAD_STRING_IMPORT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IMPORT) #define DUK_STRIDX_SUPER 153 /* 'super' */ #define DUK_HEAP_STRING_SUPER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SUPER) #define DUK_HTHREAD_STRING_SUPER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SUPER) #define DUK_STRIDX_LC_NULL 154 /* 'null' */ #define DUK_HEAP_STRING_LC_NULL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_NULL) #define DUK_HTHREAD_STRING_LC_NULL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_NULL) #define DUK_STRIDX_TRUE 155 /* 'true' */ #define DUK_HEAP_STRING_TRUE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TRUE) #define DUK_HTHREAD_STRING_TRUE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TRUE) #define DUK_STRIDX_FALSE 156 /* 'false' */ #define DUK_HEAP_STRING_FALSE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FALSE) #define DUK_HTHREAD_STRING_FALSE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FALSE) #define DUK_STRIDX_IMPLEMENTS 157 /* 'implements' */ #define DUK_HEAP_STRING_IMPLEMENTS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IMPLEMENTS) #define DUK_HTHREAD_STRING_IMPLEMENTS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IMPLEMENTS) #define DUK_STRIDX_INTERFACE 158 /* 'interface' */ #define DUK_HEAP_STRING_INTERFACE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INTERFACE) #define DUK_HTHREAD_STRING_INTERFACE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INTERFACE) #define DUK_STRIDX_LET 159 /* 'let' */ #define DUK_HEAP_STRING_LET(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LET) #define DUK_HTHREAD_STRING_LET(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LET) #define DUK_STRIDX_PACKAGE 160 /* 'package' */ #define DUK_HEAP_STRING_PACKAGE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PACKAGE) #define DUK_HTHREAD_STRING_PACKAGE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PACKAGE) #define DUK_STRIDX_PRIVATE 161 /* 'private' */ #define DUK_HEAP_STRING_PRIVATE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PRIVATE) #define DUK_HTHREAD_STRING_PRIVATE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PRIVATE) #define DUK_STRIDX_PROTECTED 162 /* 'protected' */ #define DUK_HEAP_STRING_PROTECTED(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PROTECTED) #define DUK_HTHREAD_STRING_PROTECTED(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PROTECTED) #define DUK_STRIDX_PUBLIC 163 /* 'public' */ #define DUK_HEAP_STRING_PUBLIC(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PUBLIC) #define DUK_HTHREAD_STRING_PUBLIC(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PUBLIC) #define DUK_STRIDX_STATIC 164 /* 'static' */ #define DUK_HEAP_STRING_STATIC(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_STATIC) #define DUK_HTHREAD_STRING_STATIC(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_STATIC) #define DUK_STRIDX_YIELD 165 /* 'yield' */ #define DUK_HEAP_STRING_YIELD(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_YIELD) #define DUK_HTHREAD_STRING_YIELD(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_YIELD) #define DUK_HEAP_NUM_STRINGS 166 #define DUK_STRIDX_START_RESERVED 121 #define DUK_STRIDX_START_STRICT_RESERVED 157 #define DUK_STRIDX_END_RESERVED 166 /* exclusive endpoint */ /* To convert a heap stridx to a token number, subtract * DUK_STRIDX_START_RESERVED and add DUK_TOK_START_RESERVED. */ #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL const duk_uint8_t duk_strings_data[967]; #endif /* !DUK_SINGLE_FILE */ #define DUK_STRDATA_MAX_STRLEN 27 #define DUK_STRDATA_DATA_LENGTH 967 #endif /* DUK_USE_ROM_STRINGS */ #if defined(DUK_USE_ROM_OBJECTS) #error RAM support not enabled, rerun configure.py with --ram-support #else /* DUK_USE_ROM_OBJECTS */ DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_function_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_boolean_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_number_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_error_constructor_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_type_error_thrower(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_parse_int(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_parse_float(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_thread_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_pointer_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_proxy_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_symbol_constructor_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_arraybuffer_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_dataview_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_typedarray_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_textencoder_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_textdecoder_constructor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_eval(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_is_nan(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_is_finite(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_decode_uri(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_decode_uri_component(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_encode_uri(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_encode_uri_component(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_escape(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_unescape(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_getprototype_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_setprototype_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_get_own_property_descriptor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_keys_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_assign(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_create(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_define_property(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_define_properties(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_seal_freeze_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_prevent_extensions(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_is_sealed_frozen_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_is_extensible(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_is(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_to_string(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_to_locale_string(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_value_of(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_has_own_property(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_is_prototype_of(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_property_is_enumerable(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_defineaccessor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_lookupaccessor(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype_to_string(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype_apply(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype_call(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype_bind(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype_hasinstance(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_native_function_length(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_native_function_name(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_constructor_is_array(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_to_string(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_join_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_concat(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_pop(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_push(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_reverse(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_shift(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_slice(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_sort(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_splice(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_unshift(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_indexof_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_iter_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_reduce_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_constructor_from_char_code(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_constructor_from_code_point(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_to_string(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_char_at(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_char_code_at(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_concat(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_indexof_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_locale_compare(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_match(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_replace(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_search(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_slice(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_split(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_substring(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_caseconv_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_trim(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_repeat(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_startswith_endswith(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_includes(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_substr(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_boolean_prototype_tostring_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_number_check_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_string(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_locale_string(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_value_of(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_fixed(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_exponential(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_precision(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_constructor_parse(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_constructor_utc(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_constructor_now(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_tostring_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_to_json(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_value_of(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_get_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_get_timezone_offset(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_set_time(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_set_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_toprimitive(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_prototype_exec(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_prototype_test(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_prototype_tostring(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_prototype_flags(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_prototype_shared_getter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_stack_getter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_stack_setter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_filename_getter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_filename_setter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_linenumber_getter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_linenumber_setter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_to_string(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_onearg_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_twoarg_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_clz32(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_hypot(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_imul(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_max(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_min(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_random(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_sign(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_json_object_parse(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_json_object_stringify(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_info(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_act(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_gc(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_fin(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_enc(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_dec(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_compact(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_thread_yield(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_thread_resume(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_thread_current(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_pointer_prototype_tostring_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_reflect_apply(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_reflect_construct(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_reflect_object_delete_property(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_reflect_object_get(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_reflect_object_has(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_reflect_object_set(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_symbol_key_for(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_symbol_tostring_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_symbol_toprimitive(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_arraybuffer_isview(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_typedarray_bytelength_getter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_slice_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_typedarray_byteoffset_getter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_typedarray_buffer_getter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_readfield(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_writefield(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_typedarray_set(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_uint8array_allocplain(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_uint8array_plainof(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_concat(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_is_encoding(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_is_buffer(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_byte_length(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_compare_shared(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_tostring(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_tojson(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_fill(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_copy(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_write(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_textencoder_prototype_encoding_getter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_textencoder_prototype_encode(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_textdecoder_prototype_shared_getter(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_textdecoder_prototype_decode(duk_context *ctx); DUK_INTERNAL_DECL duk_ret_t duk_bi_performance_now(duk_context *ctx); #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL const duk_c_function duk_bi_native_functions[183]; #endif /* !DUK_SINGLE_FILE */ #define DUK_BIDX_GLOBAL 0 #define DUK_BIDX_GLOBAL_ENV 1 #define DUK_BIDX_OBJECT_CONSTRUCTOR 2 #define DUK_BIDX_OBJECT_PROTOTYPE 3 #define DUK_BIDX_FUNCTION_CONSTRUCTOR 4 #define DUK_BIDX_FUNCTION_PROTOTYPE 5 #define DUK_BIDX_NATIVE_FUNCTION_PROTOTYPE 6 #define DUK_BIDX_ARRAY_CONSTRUCTOR 7 #define DUK_BIDX_ARRAY_PROTOTYPE 8 #define DUK_BIDX_STRING_CONSTRUCTOR 9 #define DUK_BIDX_STRING_PROTOTYPE 10 #define DUK_BIDX_BOOLEAN_CONSTRUCTOR 11 #define DUK_BIDX_BOOLEAN_PROTOTYPE 12 #define DUK_BIDX_NUMBER_CONSTRUCTOR 13 #define DUK_BIDX_NUMBER_PROTOTYPE 14 #define DUK_BIDX_DATE_CONSTRUCTOR 15 #define DUK_BIDX_DATE_PROTOTYPE 16 #define DUK_BIDX_REGEXP_CONSTRUCTOR 17 #define DUK_BIDX_REGEXP_PROTOTYPE 18 #define DUK_BIDX_ERROR_CONSTRUCTOR 19 #define DUK_BIDX_ERROR_PROTOTYPE 20 #define DUK_BIDX_EVAL_ERROR_CONSTRUCTOR 21 #define DUK_BIDX_EVAL_ERROR_PROTOTYPE 22 #define DUK_BIDX_RANGE_ERROR_CONSTRUCTOR 23 #define DUK_BIDX_RANGE_ERROR_PROTOTYPE 24 #define DUK_BIDX_REFERENCE_ERROR_CONSTRUCTOR 25 #define DUK_BIDX_REFERENCE_ERROR_PROTOTYPE 26 #define DUK_BIDX_SYNTAX_ERROR_CONSTRUCTOR 27 #define DUK_BIDX_SYNTAX_ERROR_PROTOTYPE 28 #define DUK_BIDX_TYPE_ERROR_CONSTRUCTOR 29 #define DUK_BIDX_TYPE_ERROR_PROTOTYPE 30 #define DUK_BIDX_URI_ERROR_CONSTRUCTOR 31 #define DUK_BIDX_URI_ERROR_PROTOTYPE 32 #define DUK_BIDX_TYPE_ERROR_THROWER 33 #define DUK_BIDX_DUKTAPE 34 #define DUK_BIDX_THREAD_PROTOTYPE 35 #define DUK_BIDX_POINTER_PROTOTYPE 36 #define DUK_BIDX_DOUBLE_ERROR 37 #define DUK_BIDX_SYMBOL_PROTOTYPE 38 #define DUK_BIDX_ARRAYBUFFER_PROTOTYPE 39 #define DUK_BIDX_DATAVIEW_PROTOTYPE 40 #define DUK_BIDX_INT8ARRAY_PROTOTYPE 41 #define DUK_BIDX_UINT8ARRAY_PROTOTYPE 42 #define DUK_BIDX_UINT8CLAMPEDARRAY_PROTOTYPE 43 #define DUK_BIDX_INT16ARRAY_PROTOTYPE 44 #define DUK_BIDX_UINT16ARRAY_PROTOTYPE 45 #define DUK_BIDX_INT32ARRAY_PROTOTYPE 46 #define DUK_BIDX_UINT32ARRAY_PROTOTYPE 47 #define DUK_BIDX_FLOAT32ARRAY_PROTOTYPE 48 #define DUK_BIDX_FLOAT64ARRAY_PROTOTYPE 49 #define DUK_BIDX_NODEJS_BUFFER_PROTOTYPE 50 #define DUK_NUM_BUILTINS 51 #define DUK_NUM_BIDX_BUILTINS 51 #define DUK_NUM_ALL_BUILTINS 79 #if defined(DUK_USE_DOUBLE_LE) #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL const duk_uint8_t duk_builtins_data[4251]; #endif /* !DUK_SINGLE_FILE */ #define DUK_BUILTINS_DATA_LENGTH 4251 #elif defined(DUK_USE_DOUBLE_BE) #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL const duk_uint8_t duk_builtins_data[4251]; #endif /* !DUK_SINGLE_FILE */ #define DUK_BUILTINS_DATA_LENGTH 4251 #elif defined(DUK_USE_DOUBLE_ME) #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL const duk_uint8_t duk_builtins_data[4251]; #endif /* !DUK_SINGLE_FILE */ #define DUK_BUILTINS_DATA_LENGTH 4251 #else #error invalid endianness defines #endif #endif /* DUK_USE_ROM_OBJECTS */ #endif /* DUK_BUILTINS_H_INCLUDED */ /* #include duk_util.h */ /* * Utilities */ #if !defined(DUK_UTIL_H_INCLUDED) #define DUK_UTIL_H_INCLUDED #if defined(DUK_USE_GET_RANDOM_DOUBLE) #define DUK_UTIL_GET_RANDOM_DOUBLE(thr) DUK_USE_GET_RANDOM_DOUBLE((thr)->heap_udata) #else #define DUK_UTIL_GET_RANDOM_DOUBLE(thr) duk_util_tinyrandom_get_double(thr) #endif /* * Some useful constants */ #define DUK_DOUBLE_2TO32 4294967296.0 #define DUK_DOUBLE_2TO31 2147483648.0 #define DUK_DOUBLE_LOG2E 1.4426950408889634 #define DUK_DOUBLE_LOG10E 0.4342944819032518 /* * Endian conversion */ #if defined(DUK_USE_INTEGER_LE) #define DUK_HTON32(x) DUK_BSWAP32((x)) #define DUK_NTOH32(x) DUK_BSWAP32((x)) #define DUK_HTON16(x) DUK_BSWAP16((x)) #define DUK_NTOH16(x) DUK_BSWAP16((x)) #elif defined(DUK_USE_INTEGER_BE) #define DUK_HTON32(x) (x) #define DUK_NTOH32(x) (x) #define DUK_HTON16(x) (x) #define DUK_NTOH16(x) (x) #else #error internal error, endianness defines broken #endif /* * Bitstream decoder */ struct duk_bitdecoder_ctx { const duk_uint8_t *data; duk_size_t offset; duk_size_t length; duk_uint32_t currval; duk_small_int_t currbits; }; #define DUK_BD_BITPACKED_STRING_MAXLEN 256 /* * Bitstream encoder */ struct duk_bitencoder_ctx { duk_uint8_t *data; duk_size_t offset; duk_size_t length; duk_uint32_t currval; duk_small_int_t currbits; duk_small_int_t truncated; }; /* * Raw write/read macros for big endian, unaligned basic values. * Caller ensures there's enough space. The macros update the pointer * argument automatically on resizes. The idiom seems a bit odd, but * leads to compact code. */ #define DUK_RAW_WRITE_U8(ptr,val) do { \ *(ptr)++ = (duk_uint8_t) (val); \ } while (0) #define DUK_RAW_WRITE_U16_BE(ptr,val) duk_raw_write_u16_be(&(ptr), (duk_uint16_t) (val)) #define DUK_RAW_WRITE_U32_BE(ptr,val) duk_raw_write_u32_be(&(ptr), (duk_uint32_t) (val)) #define DUK_RAW_WRITE_DOUBLE_BE(ptr,val) duk_raw_write_double_be(&(ptr), (duk_double_t) (val)) #define DUK_RAW_WRITE_XUTF8(ptr,val) do { \ /* 'ptr' is evaluated both as LHS and RHS. */ \ duk_uint8_t *duk__ptr; \ duk_small_int_t duk__len; \ duk__ptr = (duk_uint8_t *) (ptr); \ duk__len = duk_unicode_encode_xutf8((duk_ucodepoint_t) (val), duk__ptr); \ duk__ptr += duk__len; \ (ptr) = duk__ptr; \ } while (0) #define DUK_RAW_WRITE_CESU8(ptr,val) do { \ /* 'ptr' is evaluated both as LHS and RHS. */ \ duk_uint8_t *duk__ptr; \ duk_small_int_t duk__len; \ duk__ptr = (duk_uint8_t *) (ptr); \ duk__len = duk_unicode_encode_cesu8((duk_ucodepoint_t) (val), duk__ptr); \ duk__ptr += duk__len; \ (ptr) = duk__ptr; \ } while (0) #define DUK_RAW_READ_U8(ptr) ((duk_uint8_t) (*(ptr)++)) #define DUK_RAW_READ_U16_BE(ptr) duk_raw_read_u16_be(&(ptr)); #define DUK_RAW_READ_U32_BE(ptr) duk_raw_read_u32_be(&(ptr)); #define DUK_RAW_READ_DOUBLE_BE(ptr) duk_raw_read_double_be(&(ptr)); /* * Buffer writer (dynamic buffer only) * * Helper for writing to a dynamic buffer with a concept of a "slack" area * to reduce resizes. You can ensure there is enough space beforehand and * then write for a while without further checks, relying on a stable data * pointer. Slack handling is automatic so call sites only indicate how * much data they need right now. * * There are several ways to write using bufwriter. The best approach * depends mainly on how much performance matters over code footprint. * The key issues are (1) ensuring there is space and (2) keeping the * pointers consistent. Fast code should ensure space for multiple writes * with one ensure call. Fastest inner loop code can temporarily borrow * the 'p' pointer but must write it back eventually. * * Be careful to ensure all macro arguments (other than static pointers like * 'thr' and 'bw_ctx') are evaluated exactly once, using temporaries if * necessary (if that's not possible, there should be a note near the macro). * Buffer write arguments often contain arithmetic etc so this is * particularly important here. */ /* XXX: Migrate bufwriter and other read/write helpers to its own header? */ struct duk_bufwriter_ctx { duk_uint8_t *p; duk_uint8_t *p_base; duk_uint8_t *p_limit; duk_hbuffer_dynamic *buf; }; #if defined(DUK_USE_PREFER_SIZE) #define DUK_BW_SLACK_ADD 64 #define DUK_BW_SLACK_SHIFT 4 /* 2^4 -> 1/16 = 6.25% slack */ #else #define DUK_BW_SLACK_ADD 64 #define DUK_BW_SLACK_SHIFT 2 /* 2^2 -> 1/4 = 25% slack */ #endif /* Initialization and finalization (compaction), converting to other types. */ #define DUK_BW_INIT_PUSHBUF(thr,bw_ctx,sz) do { \ duk_bw_init_pushbuf((thr), (bw_ctx), (sz)); \ } while (0) #define DUK_BW_INIT_WITHBUF(thr,bw_ctx,buf) do { \ duk_bw_init((thr), (bw_ctx), (buf)); \ } while (0) #define DUK_BW_COMPACT(thr,bw_ctx) do { \ /* Make underlying buffer compact to match DUK_BW_GET_SIZE(). */ \ duk_bw_compact((thr), (bw_ctx)); \ } while (0) #define DUK_BW_PUSH_AS_STRING(thr,bw_ctx) do { \ duk_push_lstring((thr), \ (const char *) (bw_ctx)->p_base, \ (duk_size_t) ((bw_ctx)->p - (bw_ctx)->p_base)); \ } while (0) /* Pointers may be NULL for a while when 'buf' size is zero and before any * ENSURE calls have been made. Once an ENSURE has been made, the pointers * are required to be non-NULL so that it's always valid to use memcpy() and * memmove(), even for zero size. */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_bw_assert_valid(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx); #define DUK_BW_ASSERT_VALID_EXPR(thr,bw_ctx) (duk_bw_assert_valid((thr), (bw_ctx))) #define DUK_BW_ASSERT_VALID(thr,bw_ctx) do { duk_bw_assert_valid((thr), (bw_ctx)); } while (0) #else #define DUK_BW_ASSERT_VALID_EXPR(thr,bw_ctx) DUK_ASSERT_EXPR(1) #define DUK_BW_ASSERT_VALID(thr,bw_ctx) do {} while (0) #endif /* Working with the pointer and current size. */ #define DUK_BW_GET_PTR(thr,bw_ctx) \ ((bw_ctx)->p) #define DUK_BW_SET_PTR(thr,bw_ctx,ptr) do { \ (bw_ctx)->p = (ptr); \ } while (0) #define DUK_BW_ADD_PTR(thr,bw_ctx,delta) do { \ (bw_ctx)->p += (delta); \ } while (0) #define DUK_BW_GET_BASEPTR(thr,bw_ctx) \ ((bw_ctx)->p_base) #define DUK_BW_GET_LIMITPTR(thr,bw_ctx) \ ((bw_ctx)->p_limit) #define DUK_BW_GET_SIZE(thr,bw_ctx) \ ((duk_size_t) ((bw_ctx)->p - (bw_ctx)->p_base)) #define DUK_BW_SET_SIZE(thr,bw_ctx,sz) do { \ DUK_ASSERT((duk_size_t) (sz) <= (duk_size_t) ((bw_ctx)->p - (bw_ctx)->p_base)); \ (bw_ctx)->p = (bw_ctx)->p_base + (sz); \ } while (0) #define DUK_BW_RESET_SIZE(thr,bw_ctx) do { \ /* Reset to zero size, keep current limit. */ \ (bw_ctx)->p = (bw_ctx)->p_base; \ } while (0) #define DUK_BW_GET_BUFFER(thr,bw_ctx) \ ((bw_ctx)->buf) /* Ensuring (reserving) space. */ #define DUK_BW_ENSURE(thr,bw_ctx,sz) do { \ duk_size_t duk__sz, duk__space; \ DUK_BW_ASSERT_VALID((thr), (bw_ctx)); \ duk__sz = (sz); \ duk__space = (duk_size_t) ((bw_ctx)->p_limit - (bw_ctx)->p); \ if (duk__space < duk__sz) { \ (void) duk_bw_resize((thr), (bw_ctx), duk__sz); \ } \ } while (0) /* NOTE: Multiple evaluation of 'ptr' in this macro. */ /* XXX: Rework to use an always-inline function? */ #define DUK_BW_ENSURE_RAW(thr,bw_ctx,sz,ptr) \ (((duk_size_t) ((bw_ctx)->p_limit - (ptr)) >= (sz)) ? \ (ptr) : \ ((bw_ctx)->p = (ptr), duk_bw_resize((thr),(bw_ctx),(sz)))) #define DUK_BW_ENSURE_GETPTR(thr,bw_ctx,sz) \ DUK_BW_ENSURE_RAW((thr), (bw_ctx), (sz), (bw_ctx)->p) #define DUK_BW_ASSERT_SPACE_EXPR(thr,bw_ctx,sz) \ (DUK_BW_ASSERT_VALID_EXPR((thr), (bw_ctx)), \ DUK_ASSERT_EXPR((duk_size_t) ((bw_ctx)->p_limit - (bw_ctx)->p) >= (duk_size_t) (sz))) #define DUK_BW_ASSERT_SPACE(thr,bw_ctx,sz) do { \ DUK_BW_ASSERT_SPACE_EXPR((thr), (bw_ctx), (sz)); \ } while (0) /* Miscellaneous. */ #define DUK_BW_SETPTR_AND_COMPACT(thr,bw_ctx,ptr) do { \ (bw_ctx)->p = (ptr); \ duk_bw_compact((thr), (bw_ctx)); \ } while (0) /* Fast write calls which assume you control the slack beforehand. * Multibyte write variants exist and use a temporary write pointer * because byte writes alias with anything: with a stored pointer * explicit pointer load/stores get generated (e.g. gcc -Os). */ #define DUK_BW_WRITE_RAW_U8(thr,bw_ctx,val) do { \ DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 1); \ *(bw_ctx)->p++ = (duk_uint8_t) (val); \ } while (0) #define DUK_BW_WRITE_RAW_U8_2(thr,bw_ctx,val1,val2) do { \ duk_uint8_t *duk__p; \ DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 2); \ duk__p = (bw_ctx)->p; \ *duk__p++ = (duk_uint8_t) (val1); \ *duk__p++ = (duk_uint8_t) (val2); \ (bw_ctx)->p = duk__p; \ } while (0) #define DUK_BW_WRITE_RAW_U8_3(thr,bw_ctx,val1,val2,val3) do { \ duk_uint8_t *duk__p; \ DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 3); \ duk__p = (bw_ctx)->p; \ *duk__p++ = (duk_uint8_t) (val1); \ *duk__p++ = (duk_uint8_t) (val2); \ *duk__p++ = (duk_uint8_t) (val3); \ (bw_ctx)->p = duk__p; \ } while (0) #define DUK_BW_WRITE_RAW_U8_4(thr,bw_ctx,val1,val2,val3,val4) do { \ duk_uint8_t *duk__p; \ DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 4); \ duk__p = (bw_ctx)->p; \ *duk__p++ = (duk_uint8_t) (val1); \ *duk__p++ = (duk_uint8_t) (val2); \ *duk__p++ = (duk_uint8_t) (val3); \ *duk__p++ = (duk_uint8_t) (val4); \ (bw_ctx)->p = duk__p; \ } while (0) #define DUK_BW_WRITE_RAW_U8_5(thr,bw_ctx,val1,val2,val3,val4,val5) do { \ duk_uint8_t *duk__p; \ DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 5); \ duk__p = (bw_ctx)->p; \ *duk__p++ = (duk_uint8_t) (val1); \ *duk__p++ = (duk_uint8_t) (val2); \ *duk__p++ = (duk_uint8_t) (val3); \ *duk__p++ = (duk_uint8_t) (val4); \ *duk__p++ = (duk_uint8_t) (val5); \ (bw_ctx)->p = duk__p; \ } while (0) #define DUK_BW_WRITE_RAW_U8_6(thr,bw_ctx,val1,val2,val3,val4,val5,val6) do { \ duk_uint8_t *duk__p; \ DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 6); \ duk__p = (bw_ctx)->p; \ *duk__p++ = (duk_uint8_t) (val1); \ *duk__p++ = (duk_uint8_t) (val2); \ *duk__p++ = (duk_uint8_t) (val3); \ *duk__p++ = (duk_uint8_t) (val4); \ *duk__p++ = (duk_uint8_t) (val5); \ *duk__p++ = (duk_uint8_t) (val6); \ (bw_ctx)->p = duk__p; \ } while (0) #define DUK_BW_WRITE_RAW_XUTF8(thr,bw_ctx,cp) do { \ duk_ucodepoint_t duk__cp; \ duk_small_int_t duk__enc_len; \ duk__cp = (duk_ucodepoint_t) (cp); \ DUK_BW_ASSERT_SPACE((thr), (bw_ctx), duk_unicode_get_xutf8_length(duk__cp)); \ duk__enc_len = duk_unicode_encode_xutf8(duk__cp, (bw_ctx)->p); \ (bw_ctx)->p += duk__enc_len; \ } while (0) #define DUK_BW_WRITE_RAW_CESU8(thr,bw_ctx,cp) do { \ duk_ucodepoint_t duk__cp; \ duk_small_int_t duk__enc_len; \ duk__cp = (duk_ucodepoint_t) (cp); \ DUK_BW_ASSERT_SPACE((thr), (bw_ctx), duk_unicode_get_cesu8_length(duk__cp)); \ duk__enc_len = duk_unicode_encode_cesu8(duk__cp, (bw_ctx)->p); \ (bw_ctx)->p += duk__enc_len; \ } while (0) /* XXX: add temporary duk__p pointer here too; sharing */ /* XXX: avoid unsafe variants */ #define DUK_BW_WRITE_RAW_BYTES(thr,bw_ctx,valptr,valsz) do { \ const void *duk__valptr; \ duk_size_t duk__valsz; \ duk__valptr = (const void *) (valptr); \ duk__valsz = (duk_size_t) (valsz); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), duk__valptr, duk__valsz); \ (bw_ctx)->p += duk__valsz; \ } while (0) #define DUK_BW_WRITE_RAW_CSTRING(thr,bw_ctx,val) do { \ const duk_uint8_t *duk__val; \ duk_size_t duk__val_len; \ duk__val = (const duk_uint8_t *) (val); \ duk__val_len = DUK_STRLEN((const char *) duk__val); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) duk__val, duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) #define DUK_BW_WRITE_RAW_HSTRING(thr,bw_ctx,val) do { \ duk_size_t duk__val_len; \ duk__val_len = DUK_HSTRING_GET_BYTELEN((val)); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) DUK_HSTRING_GET_DATA((val)), duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) #define DUK_BW_WRITE_RAW_HBUFFER(thr,bw_ctx,val) do { \ duk_size_t duk__val_len; \ duk__val_len = DUK_HBUFFER_GET_SIZE((val)); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) #define DUK_BW_WRITE_RAW_HBUFFER_FIXED(thr,bw_ctx,val) do { \ duk_size_t duk__val_len; \ duk__val_len = DUK_HBUFFER_FIXED_GET_SIZE((val)); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_FIXED_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) #define DUK_BW_WRITE_RAW_HBUFFER_DYNAMIC(thr,bw_ctx,val) do { \ duk_size_t duk__val_len; \ duk__val_len = DUK_HBUFFER_DYNAMIC_GET_SIZE((val)); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) /* Append bytes from a slice already in the buffer. */ #define DUK_BW_WRITE_RAW_SLICE(thr,bw,dst_off,dst_len) \ duk_bw_write_raw_slice((thr), (bw), (dst_off), (dst_len)) /* Insert bytes in the middle of the buffer from an external buffer. */ #define DUK_BW_INSERT_RAW_BYTES(thr,bw,dst_off,buf,len) \ duk_bw_insert_raw_bytes((thr), (bw), (dst_off), (buf), (len)) /* Insert bytes in the middle of the buffer from a slice already * in the buffer. Source offset is interpreted "before" the operation. */ #define DUK_BW_INSERT_RAW_SLICE(thr,bw,dst_off,src_off,len) \ duk_bw_insert_raw_slice((thr), (bw), (dst_off), (src_off), (len)) /* Insert a reserved area somewhere in the buffer; caller fills it. * Evaluates to a (duk_uint_t *) pointing to the start of the reserved * area for convenience. */ #define DUK_BW_INSERT_RAW_AREA(thr,bw,off,len) \ duk_bw_insert_raw_area((thr), (bw), (off), (len)) /* Remove a slice from inside buffer. */ #define DUK_BW_REMOVE_RAW_SLICE(thr,bw,off,len) \ duk_bw_remove_raw_slice((thr), (bw), (off), (len)) /* Safe write calls which will ensure space first. */ #define DUK_BW_WRITE_ENSURE_U8(thr,bw_ctx,val) do { \ DUK_BW_ENSURE((thr), (bw_ctx), 1); \ DUK_BW_WRITE_RAW_U8((thr), (bw_ctx), (val)); \ } while (0) #define DUK_BW_WRITE_ENSURE_U8_2(thr,bw_ctx,val1,val2) do { \ DUK_BW_ENSURE((thr), (bw_ctx), 2); \ DUK_BW_WRITE_RAW_U8_2((thr), (bw_ctx), (val1), (val2)); \ } while (0) #define DUK_BW_WRITE_ENSURE_U8_3(thr,bw_ctx,val1,val2,val3) do { \ DUK_BW_ENSURE((thr), (bw_ctx), 3); \ DUK_BW_WRITE_RAW_U8_3((thr), (bw_ctx), (val1), (val2), (val3)); \ } while (0) #define DUK_BW_WRITE_ENSURE_U8_4(thr,bw_ctx,val1,val2,val3,val4) do { \ DUK_BW_ENSURE((thr), (bw_ctx), 4); \ DUK_BW_WRITE_RAW_U8_4((thr), (bw_ctx), (val1), (val2), (val3), (val4)); \ } while (0) #define DUK_BW_WRITE_ENSURE_U8_5(thr,bw_ctx,val1,val2,val3,val4,val5) do { \ DUK_BW_ENSURE((thr), (bw_ctx), 5); \ DUK_BW_WRITE_RAW_U8_5((thr), (bw_ctx), (val1), (val2), (val3), (val4), (val5)); \ } while (0) #define DUK_BW_WRITE_ENSURE_U8_6(thr,bw_ctx,val1,val2,val3,val4,val5,val6) do { \ DUK_BW_ENSURE((thr), (bw_ctx), 6); \ DUK_BW_WRITE_RAW_U8_6((thr), (bw_ctx), (val1), (val2), (val3), (val4), (val5), (val6)); \ } while (0) #define DUK_BW_WRITE_ENSURE_XUTF8(thr,bw_ctx,cp) do { \ DUK_BW_ENSURE((thr), (bw_ctx), DUK_UNICODE_MAX_XUTF8_LENGTH); \ DUK_BW_WRITE_RAW_XUTF8((thr), (bw_ctx), (cp)); \ } while (0) #define DUK_BW_WRITE_ENSURE_CESU8(thr,bw_ctx,cp) do { \ DUK_BW_ENSURE((thr), (bw_ctx), DUK_UNICODE_MAX_CESU8_LENGTH); \ DUK_BW_WRITE_RAW_CESU8((thr), (bw_ctx), (cp)); \ } while (0) /* XXX: add temporary duk__p pointer here too; sharing */ /* XXX: avoid unsafe */ #define DUK_BW_WRITE_ENSURE_BYTES(thr,bw_ctx,valptr,valsz) do { \ const void *duk__valptr; \ duk_size_t duk__valsz; \ duk__valptr = (const void *) (valptr); \ duk__valsz = (duk_size_t) (valsz); \ DUK_BW_ENSURE((thr), (bw_ctx), duk__valsz); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), duk__valptr, duk__valsz); \ (bw_ctx)->p += duk__valsz; \ } while (0) #define DUK_BW_WRITE_ENSURE_CSTRING(thr,bw_ctx,val) do { \ const duk_uint8_t *duk__val; \ duk_size_t duk__val_len; \ duk__val = (const duk_uint8_t *) (val); \ duk__val_len = DUK_STRLEN((const char *) duk__val); \ DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) duk__val, duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) #define DUK_BW_WRITE_ENSURE_HSTRING(thr,bw_ctx,val) do { \ duk_size_t duk__val_len; \ duk__val_len = DUK_HSTRING_GET_BYTELEN((val)); \ DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) DUK_HSTRING_GET_DATA((val)), duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) #define DUK_BW_WRITE_ENSURE_HBUFFER(thr,bw_ctx,val) do { \ duk_size_t duk__val_len; \ duk__val_len = DUK_HBUFFER_GET_SIZE((val)); \ DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) #define DUK_BW_WRITE_ENSURE_HBUFFER_FIXED(thr,bw_ctx,val) do { \ duk_size_t duk__val_len; \ duk__val_len = DUK_HBUFFER_FIXED_GET_SIZE((val)); \ DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_FIXED_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) #define DUK_BW_WRITE_ENSURE_HBUFFER_DYNAMIC(thr,bw_ctx,val) do { \ duk_size_t duk__val_len; \ duk__val_len = DUK_HBUFFER_DYNAMIC_GET_SIZE((val)); \ DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \ duk_memcpy_unsafe((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \ (bw_ctx)->p += duk__val_len; \ } while (0) #define DUK_BW_WRITE_ENSURE_SLICE(thr,bw,dst_off,dst_len) \ duk_bw_write_ensure_slice((thr), (bw), (dst_off), (dst_len)) #define DUK_BW_INSERT_ENSURE_BYTES(thr,bw,dst_off,buf,len) \ duk_bw_insert_ensure_bytes((thr), (bw), (dst_off), (buf), (len)) #define DUK_BW_INSERT_ENSURE_SLICE(thr,bw,dst_off,src_off,len) \ duk_bw_insert_ensure_slice((thr), (bw), (dst_off), (src_off), (len)) #define DUK_BW_INSERT_ENSURE_AREA(thr,bw,off,len) \ /* Evaluates to (duk_uint8_t *) pointing to start of area. */ \ duk_bw_insert_ensure_area((thr), (bw), (off), (len)) #define DUK_BW_REMOVE_ENSURE_SLICE(thr,bw,off,len) \ /* No difference between raw/ensure because the buffer shrinks. */ \ DUK_BW_REMOVE_RAW_SLICE((thr), (bw), (off), (len)) /* * Externs and prototypes */ #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL const duk_uint8_t duk_lc_digits[36]; DUK_INTERNAL_DECL const duk_uint8_t duk_uc_nybbles[16]; DUK_INTERNAL_DECL const duk_int8_t duk_hex_dectab[256]; #if defined(DUK_USE_HEX_FASTPATH) DUK_INTERNAL_DECL const duk_int16_t duk_hex_dectab_shift4[256]; DUK_INTERNAL_DECL const duk_uint16_t duk_hex_enctab[256]; #endif #endif /* !DUK_SINGLE_FILE */ /* Note: assumes that duk_util_probe_steps size is 32 */ #if defined(DUK_USE_HOBJECT_HASH_PART) #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL duk_uint8_t duk_util_probe_steps[32]; #endif /* !DUK_SINGLE_FILE */ #endif #if defined(DUK_USE_STRHASH_DENSE) DUK_INTERNAL_DECL duk_uint32_t duk_util_hashbytes(const duk_uint8_t *data, duk_size_t len, duk_uint32_t seed); #endif DUK_INTERNAL_DECL duk_uint32_t duk_bd_decode(duk_bitdecoder_ctx *ctx, duk_small_int_t bits); DUK_INTERNAL_DECL duk_small_uint_t duk_bd_decode_flag(duk_bitdecoder_ctx *ctx); DUK_INTERNAL_DECL duk_uint32_t duk_bd_decode_flagged(duk_bitdecoder_ctx *ctx, duk_small_int_t bits, duk_uint32_t def_value); DUK_INTERNAL_DECL duk_int32_t duk_bd_decode_flagged_signed(duk_bitdecoder_ctx *ctx, duk_small_int_t bits, duk_int32_t def_value); DUK_INTERNAL_DECL duk_uint32_t duk_bd_decode_varuint(duk_bitdecoder_ctx *ctx); DUK_INTERNAL_DECL duk_small_uint_t duk_bd_decode_bitpacked_string(duk_bitdecoder_ctx *bd, duk_uint8_t *out); DUK_INTERNAL_DECL void duk_be_encode(duk_bitencoder_ctx *ctx, duk_uint32_t data, duk_small_int_t bits); DUK_INTERNAL_DECL void duk_be_finish(duk_bitencoder_ctx *ctx); #if !defined(DUK_USE_GET_RANDOM_DOUBLE) DUK_INTERNAL_DECL duk_double_t duk_util_tinyrandom_get_double(duk_hthread *thr); DUK_INTERNAL_DECL void duk_util_tinyrandom_prepare_seed(duk_hthread *thr); #endif DUK_INTERNAL_DECL void duk_bw_init(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_hbuffer_dynamic *h_buf); DUK_INTERNAL_DECL void duk_bw_init_pushbuf(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t buf_size); DUK_INTERNAL_DECL duk_uint8_t *duk_bw_resize(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t sz); DUK_INTERNAL_DECL void duk_bw_compact(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx); DUK_INTERNAL_DECL void duk_bw_write_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t src_off, duk_size_t len); DUK_INTERNAL_DECL void duk_bw_write_ensure_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t src_off, duk_size_t len); DUK_INTERNAL_DECL void duk_bw_insert_raw_bytes(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, const duk_uint8_t *buf, duk_size_t len); DUK_INTERNAL_DECL void duk_bw_insert_ensure_bytes(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, const duk_uint8_t *buf, duk_size_t len); DUK_INTERNAL_DECL void duk_bw_insert_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, duk_size_t src_off, duk_size_t len); DUK_INTERNAL_DECL void duk_bw_insert_ensure_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, duk_size_t src_off, duk_size_t len); DUK_INTERNAL_DECL duk_uint8_t *duk_bw_insert_raw_area(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len); DUK_INTERNAL_DECL duk_uint8_t *duk_bw_insert_ensure_area(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len); DUK_INTERNAL_DECL void duk_bw_remove_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len); /* No duk_bw_remove_ensure_slice(), functionality would be identical. */ DUK_INTERNAL_DECL DUK_INLINE duk_uint16_t duk_raw_read_u16_be(duk_uint8_t **p); DUK_INTERNAL_DECL DUK_INLINE duk_uint32_t duk_raw_read_u32_be(duk_uint8_t **p); DUK_INTERNAL_DECL DUK_INLINE duk_double_t duk_raw_read_double_be(duk_uint8_t **p); DUK_INTERNAL_DECL DUK_INLINE void duk_raw_write_u16_be(duk_uint8_t **p, duk_uint16_t val); DUK_INTERNAL_DECL DUK_INLINE void duk_raw_write_u32_be(duk_uint8_t **p, duk_uint32_t val); DUK_INTERNAL_DECL DUK_INLINE void duk_raw_write_double_be(duk_uint8_t **p, duk_double_t val); #if defined(DUK_USE_DEBUGGER_SUPPORT) /* For now only needed by the debugger. */ DUK_INTERNAL_DECL void duk_byteswap_bytes(duk_uint8_t *p, duk_small_uint_t len); #endif /* memcpy(), memmove() etc wrappers. The plain variants like duk_memcpy() * assume C99+ and 'src' and 'dst' pointers must be non-NULL even when the * operation size is zero. The unsafe variants like duk_memcpy_safe() deal * with the zero size case explicitly, and allow NULL pointers in that case * (which is undefined behavior in C99+). For the majority of actual targets * a NULL pointer with a zero length is fine in practice. These wrappers are * macros to force inlining; because there are hundreds of call sites, even a * few extra bytes per call site adds up to ~1kB footprint. */ #if defined(DUK_USE_ALLOW_UNDEFINED_BEHAVIOR) #define duk_memcpy(dst,src,len) do { \ void *duk__dst = (dst); \ const void *duk__src = (src); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL || duk__len == 0U); \ DUK_ASSERT(duk__src != NULL || duk__len == 0U); \ (void) DUK_MEMCPY(duk__dst, duk__src, (size_t) duk__len); \ } while (0) #define duk_memcpy_unsafe(dst,src,len) duk_memcpy((dst), (src), (len)) #define duk_memmove(dst,src,len) do { \ void *duk__dst = (dst); \ const void *duk__src = (src); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL || duk__len == 0U); \ DUK_ASSERT(duk__src != NULL || duk__len == 0U); \ (void) DUK_MEMMOVE(duk__dst, duk__src, (size_t) duk__len); \ } while (0) #define duk_memmove_unsafe(dst,src,len) duk_memmove((dst), (src), (len)) #define duk_memset(dst,val,len) do { \ void *duk__dst = (dst); \ duk_small_int_t duk__val = (val); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL || duk__len == 0U); \ (void) DUK_MEMSET(duk__dst, duk__val, (size_t) duk__len); \ } while (0) #define duk_memset_unsafe(dst,val,len) duk_memset((dst), (val), (len)) #define duk_memzero(dst,len) do { \ void *duk__dst = (dst); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL || duk__len == 0U); \ (void) DUK_MEMZERO(duk__dst, (size_t) duk__len); \ } while (0) #define duk_memzero_unsafe(dst,len) duk_memzero((dst), (len)) #else /* DUK_USE_ALLOW_UNDEFINED_BEHAVIOR */ #define duk_memcpy(dst,src,len) do { \ void *duk__dst = (dst); \ const void *duk__src = (src); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL); \ DUK_ASSERT(duk__src != NULL); \ (void) DUK_MEMCPY(duk__dst, duk__src, (size_t) duk__len); \ } while (0) #define duk_memcpy_unsafe(dst,src,len) do { \ void *duk__dst = (dst); \ const void *duk__src = (src); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL || duk__len == 0U); \ DUK_ASSERT(duk__src != NULL || duk__len == 0U); \ if (DUK_LIKELY(duk__len > 0U)) { \ DUK_ASSERT(duk__dst != NULL); \ DUK_ASSERT(duk__src != NULL); \ (void) DUK_MEMCPY(duk__dst, duk__src, (size_t) duk__len); \ } \ } while (0) #define duk_memmove(dst,src,len) do { \ void *duk__dst = (dst); \ const void *duk__src = (src); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL); \ DUK_ASSERT(duk__src != NULL); \ (void) DUK_MEMMOVE(duk__dst, duk__src, (size_t) duk__len); \ } while (0) #define duk_memmove_unsafe(dst,src,len) do { \ void *duk__dst = (dst); \ const void *duk__src = (src); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL || duk__len == 0U); \ DUK_ASSERT(duk__src != NULL || duk__len == 0U); \ if (DUK_LIKELY(duk__len > 0U)) { \ DUK_ASSERT(duk__dst != NULL); \ DUK_ASSERT(duk__src != NULL); \ (void) DUK_MEMMOVE(duk__dst, duk__src, (size_t) duk__len); \ } \ } while (0) #define duk_memset(dst,val,len) do { \ void *duk__dst = (dst); \ duk_small_int_t duk__val = (val); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL); \ (void) DUK_MEMSET(duk__dst, duk__val, (size_t) duk__len); \ } while (0) #define duk_memset_unsafe(dst,val,len) do { \ void *duk__dst = (dst); \ duk_small_int_t duk__val = (val); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL || duk__len == 0U); \ if (DUK_LIKELY(duk__len > 0U)) { \ DUK_ASSERT(duk__dst != NULL); \ (void) DUK_MEMSET(duk__dst, duk__val, (size_t) duk__len); \ } \ } while (0) #define duk_memzero(dst,len) do { \ void *duk__dst = (dst); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL); \ (void) DUK_MEMZERO(duk__dst, (size_t) duk__len); \ } while (0) #define duk_memzero_unsafe(dst,len) do { \ void *duk__dst = (dst); \ duk_size_t duk__len = (len); \ DUK_ASSERT(duk__dst != NULL || duk__len == 0U); \ if (DUK_LIKELY(duk__len > 0U)) { \ DUK_ASSERT(duk__dst != NULL); \ (void) DUK_MEMZERO(duk__dst, (size_t) duk__len); \ } \ } while (0) #endif /* DUK_USE_ALLOW_UNDEFINED_BEHAVIOR */ DUK_INTERNAL_DECL DUK_INLINE duk_small_int_t duk_memcmp(const void *s1, const void *s2, duk_size_t len); DUK_INTERNAL_DECL DUK_INLINE duk_small_int_t duk_memcmp_unsafe(const void *s1, const void *s2, duk_size_t len); DUK_INTERNAL_DECL duk_bool_t duk_is_whole_get_int32_nonegzero(duk_double_t x, duk_int32_t *ival); DUK_INTERNAL_DECL duk_bool_t duk_is_whole_get_int32(duk_double_t x, duk_int32_t *ival); DUK_INTERNAL_DECL duk_bool_t duk_double_is_anyinf(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_double_is_posinf(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_double_is_neginf(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_double_is_nan(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_double_is_nan_or_zero(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_double_is_nan_or_inf(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_double_is_nan_zero_inf(duk_double_t x); DUK_INTERNAL_DECL duk_small_uint_t duk_double_signbit(duk_double_t x); DUK_INTERNAL_DECL duk_double_t duk_double_trunc_towards_zero(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_double_same_sign(duk_double_t x, duk_double_t y); DUK_INTERNAL_DECL duk_double_t duk_double_fmin(duk_double_t x, duk_double_t y); DUK_INTERNAL_DECL duk_double_t duk_double_fmax(duk_double_t x, duk_double_t y); DUK_INTERNAL_DECL duk_bool_t duk_double_is_finite(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_double_is_integer(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_double_is_safe_integer(duk_double_t x); DUK_INTERNAL_DECL DUK_INLINE duk_double_t duk_double_div(duk_double_t x, duk_double_t y); DUK_INTERNAL_DECL duk_int_t duk_double_to_int_t(duk_double_t x); DUK_INTERNAL_DECL duk_uint_t duk_double_to_uint_t(duk_double_t x); DUK_INTERNAL_DECL duk_int32_t duk_double_to_int32_t(duk_double_t x); DUK_INTERNAL_DECL duk_uint32_t duk_double_to_uint32_t(duk_double_t x); DUK_INTERNAL_DECL duk_float_t duk_double_to_float_t(duk_double_t x); /* * Miscellaneous */ /* Example: x = 0x10 = 0b00010000 * x - 1 = 0x0f = 0b00001111 * x & (x - 1) == 0 * * x = 0x07 = 0b00000111 * x - 1 = 0x06 = 0b00000110 * x & (x - 1) != 0 * * However, incorrectly true for x == 0 so check for that explicitly. */ #define DUK_IS_POWER_OF_TWO(x) \ ((x) != 0U && ((x) & ((x) - 1U)) == 0U) #endif /* DUK_UTIL_H_INCLUDED */ /* #include duk_strings.h */ /* * Shared string macros. * * Using shared macros helps minimize strings data size because it's easy * to check if an existing string could be used. String constants don't * need to be all defined here; defining a string here makes sense if there's * a high chance the string could be reused. Also, using macros allows * a call site express the exact string needed, but the macro may map to an * approximate string to reduce unique string count. Macros can also be * more easily tuned for low memory targets than #if defined()s throughout * the code base. * * Because format strings behave differently in the call site (they need to * be followed by format arguments), they use a special prefix DUK_STR_FMT_. * * On some compilers using explicit shared strings is preferable; on others * it may be better to use straight literals because the compiler will combine * them anyway, and such strings won't end up unnecessarily in a symbol table. */ #if !defined(DUK_ERRMSG_H_INCLUDED) #define DUK_ERRMSG_H_INCLUDED /* Mostly API and built-in method related */ #define DUK_STR_INTERNAL_ERROR "internal error" #define DUK_STR_UNSUPPORTED "unsupported" #define DUK_STR_INVALID_COUNT "invalid count" #define DUK_STR_INVALID_ARGS "invalid args" #define DUK_STR_INVALID_STATE "invalid state" #define DUK_STR_INVALID_INPUT "invalid input" #define DUK_STR_INVALID_LENGTH "invalid length" #define DUK_STR_NOT_CONSTRUCTABLE "not constructable" #define DUK_STR_CONSTRUCT_ONLY "constructor requires 'new'" #define DUK_STR_NOT_CALLABLE "not callable" #define DUK_STR_NOT_EXTENSIBLE "not extensible" #define DUK_STR_NOT_WRITABLE "not writable" #define DUK_STR_NOT_CONFIGURABLE "not configurable" #define DUK_STR_INVALID_CONTEXT "invalid context" #define DUK_STR_INVALID_INDEX "invalid args" #define DUK_STR_PUSH_BEYOND_ALLOC_STACK "cannot push beyond allocated stack" #define DUK_STR_NOT_UNDEFINED "unexpected type" #define DUK_STR_NOT_NULL "unexpected type" #define DUK_STR_NOT_BOOLEAN "unexpected type" #define DUK_STR_NOT_NUMBER "unexpected type" #define DUK_STR_NOT_STRING "unexpected type" #define DUK_STR_NOT_OBJECT "unexpected type" #define DUK_STR_NOT_POINTER "unexpected type" #define DUK_STR_NOT_BUFFER "not buffer" /* still in use with verbose messages */ #define DUK_STR_UNEXPECTED_TYPE "unexpected type" #define DUK_STR_NOT_THREAD "unexpected type" #define DUK_STR_NOT_COMPFUNC "unexpected type" #define DUK_STR_NOT_NATFUNC "unexpected type" #define DUK_STR_NOT_C_FUNCTION "unexpected type" #define DUK_STR_NOT_FUNCTION "unexpected type" #define DUK_STR_NOT_REGEXP "unexpected type" #define DUK_STR_TOPRIMITIVE_FAILED "coercion to primitive failed" #define DUK_STR_NUMBER_OUTSIDE_RANGE "number outside range" #define DUK_STR_NOT_OBJECT_COERCIBLE "not object coercible" #define DUK_STR_CANNOT_NUMBER_COERCE_SYMBOL "cannot number coerce Symbol" #define DUK_STR_CANNOT_STRING_COERCE_SYMBOL "cannot string coerce Symbol" #define DUK_STR_STRING_TOO_LONG "string too long" #define DUK_STR_BUFFER_TOO_LONG "buffer too long" #define DUK_STR_ALLOC_FAILED "alloc failed" #define DUK_STR_WRONG_BUFFER_TYPE "wrong buffer type" #define DUK_STR_BASE64_ENCODE_FAILED "base64 encode failed" #define DUK_STR_SOURCE_DECODE_FAILED "source decode failed" #define DUK_STR_UTF8_DECODE_FAILED "utf-8 decode failed" #define DUK_STR_BASE64_DECODE_FAILED "base64 decode failed" #define DUK_STR_HEX_DECODE_FAILED "hex decode failed" #define DUK_STR_INVALID_BYTECODE "invalid bytecode" #define DUK_STR_NO_SOURCECODE "no sourcecode" #define DUK_STR_RESULT_TOO_LONG "result too long" #define DUK_STR_INVALID_CFUNC_RC "invalid C function rc" #define DUK_STR_INVALID_INSTANCEOF_RVAL "invalid instanceof rval" #define DUK_STR_INVALID_INSTANCEOF_RVAL_NOPROTO "instanceof rval has no .prototype" /* JSON */ #define DUK_STR_FMT_PTR "%p" #define DUK_STR_FMT_INVALID_JSON "invalid json (at offset %ld)" #define DUK_STR_JSONDEC_RECLIMIT "json decode recursion limit" #define DUK_STR_JSONENC_RECLIMIT "json encode recursion limit" #define DUK_STR_CYCLIC_INPUT "cyclic input" /* Object property access */ #define DUK_STR_INVALID_BASE "invalid base value" #define DUK_STR_STRICT_CALLER_READ "cannot read strict 'caller'" #define DUK_STR_PROXY_REJECTED "proxy rejected" #define DUK_STR_INVALID_ARRAY_LENGTH "invalid array length" #define DUK_STR_SETTER_UNDEFINED "setter undefined" #define DUK_STR_INVALID_DESCRIPTOR "invalid descriptor" /* Proxy */ #define DUK_STR_PROXY_REVOKED "proxy revoked" #define DUK_STR_INVALID_TRAP_RESULT "invalid trap result" /* Variables */ /* Lexer */ #define DUK_STR_INVALID_ESCAPE "invalid escape" #define DUK_STR_UNTERMINATED_STRING "unterminated string" #define DUK_STR_UNTERMINATED_COMMENT "unterminated comment" #define DUK_STR_UNTERMINATED_REGEXP "unterminated regexp" #define DUK_STR_TOKEN_LIMIT "token limit" #define DUK_STR_REGEXP_SUPPORT_DISABLED "regexp support disabled" #define DUK_STR_INVALID_NUMBER_LITERAL "invalid number literal" #define DUK_STR_INVALID_TOKEN "invalid token" /* Compiler */ #define DUK_STR_PARSE_ERROR "parse error" #define DUK_STR_DUPLICATE_LABEL "duplicate label" #define DUK_STR_INVALID_LABEL "invalid label" #define DUK_STR_INVALID_ARRAY_LITERAL "invalid array literal" #define DUK_STR_INVALID_OBJECT_LITERAL "invalid object literal" #define DUK_STR_INVALID_VAR_DECLARATION "invalid variable declaration" #define DUK_STR_CANNOT_DELETE_IDENTIFIER "cannot delete identifier" #define DUK_STR_INVALID_EXPRESSION "invalid expression" #define DUK_STR_INVALID_LVALUE "invalid lvalue" #define DUK_STR_INVALID_NEWTARGET "invalid new.target" #define DUK_STR_EXPECTED_IDENTIFIER "expected identifier" #define DUK_STR_EMPTY_EXPR_NOT_ALLOWED "empty expression not allowed" #define DUK_STR_INVALID_FOR "invalid for statement" #define DUK_STR_INVALID_SWITCH "invalid switch statement" #define DUK_STR_INVALID_BREAK_CONT_LABEL "invalid break/continue label" #define DUK_STR_INVALID_RETURN "invalid return" #define DUK_STR_INVALID_TRY "invalid try" #define DUK_STR_INVALID_THROW "invalid throw" #define DUK_STR_WITH_IN_STRICT_MODE "with in strict mode" #define DUK_STR_FUNC_STMT_NOT_ALLOWED "function statement not allowed" #define DUK_STR_UNTERMINATED_STMT "unterminated statement" #define DUK_STR_INVALID_ARG_NAME "invalid argument name" #define DUK_STR_INVALID_FUNC_NAME "invalid function name" #define DUK_STR_INVALID_GETSET_NAME "invalid getter/setter name" #define DUK_STR_FUNC_NAME_REQUIRED "function name required" /* RegExp */ #define DUK_STR_INVALID_QUANTIFIER "invalid regexp quantifier" #define DUK_STR_INVALID_QUANTIFIER_NO_ATOM "quantifier without preceding atom" #define DUK_STR_INVALID_QUANTIFIER_VALUES "quantifier values invalid (qmin > qmax)" #define DUK_STR_QUANTIFIER_TOO_MANY_COPIES "quantifier requires too many atom copies" #define DUK_STR_UNEXPECTED_CLOSING_PAREN "unexpected closing parenthesis" #define DUK_STR_UNEXPECTED_END_OF_PATTERN "unexpected end of pattern" #define DUK_STR_UNEXPECTED_REGEXP_TOKEN "unexpected token in regexp" #define DUK_STR_INVALID_REGEXP_FLAGS "invalid regexp flags" #define DUK_STR_INVALID_REGEXP_ESCAPE "invalid regexp escape" #define DUK_STR_INVALID_BACKREFS "invalid backreference(s)" #define DUK_STR_INVALID_REGEXP_CHARACTER "invalid regexp character" #define DUK_STR_INVALID_REGEXP_GROUP "invalid regexp group" #define DUK_STR_UNTERMINATED_CHARCLASS "unterminated character class" #define DUK_STR_INVALID_RANGE "invalid range" /* Limits */ #define DUK_STR_VALSTACK_LIMIT "valstack limit" #define DUK_STR_CALLSTACK_LIMIT "callstack limit" #define DUK_STR_PROTOTYPE_CHAIN_LIMIT "prototype chain limit" #define DUK_STR_BOUND_CHAIN_LIMIT "function call bound chain limit" #define DUK_STR_NATIVE_STACK_LIMIT "C stack depth limit" #define DUK_STR_COMPILER_RECURSION_LIMIT "compiler recursion limit" #define DUK_STR_BYTECODE_LIMIT "bytecode limit" #define DUK_STR_REG_LIMIT "register limit" #define DUK_STR_TEMP_LIMIT "temp limit" #define DUK_STR_CONST_LIMIT "const limit" #define DUK_STR_FUNC_LIMIT "function limit" #define DUK_STR_REGEXP_COMPILER_RECURSION_LIMIT "regexp compiler recursion limit" #define DUK_STR_REGEXP_EXECUTOR_RECURSION_LIMIT "regexp executor recursion limit" #define DUK_STR_REGEXP_EXECUTOR_STEP_LIMIT "regexp step limit" #endif /* DUK_ERRMSG_H_INCLUDED */ /* #include duk_js_bytecode.h */ /* * ECMAScript bytecode */ #if !defined(DUK_JS_BYTECODE_H_INCLUDED) #define DUK_JS_BYTECODE_H_INCLUDED /* * Bytecode instruction layout * =========================== * * Instructions are unsigned 32-bit integers divided as follows: * * !3!3!2!2!2!2!2!2!2!2!2!2!1!1!1!1!1!1!1!1!1!1! ! ! ! ! ! ! ! ! ! ! * !1!0!9!8!7!6!5!4!3!2!1!0!9!8!7!6!5!4!3!2!1!0!9!8!7!6!5!4!3!2!1!0! * +-----------------------------------------------+---------------+ * ! C ! B ! A ! OP ! * +-----------------------------------------------+---------------+ * * OP (8 bits): opcode (DUK_OP_*), access should be fastest * consecutive opcodes allocated when opcode needs flags * A (8 bits): typically a target register number * B (8 bits): typically first source register/constant number * C (8 bits): typically second source register/constant number * * Some instructions combine BC or ABC together for larger parameter values. * Signed integers (e.g. jump offsets) are encoded as unsigned, with an * opcode specific bias. * * Some opcodes have flags which are handled by allocating consecutive * opcodes to make space for 1-N flags. Flags can also be e.g. in the 'A' * field when there's room for the specific opcode. * * For example, if three flags were needed, they could be allocated from * the opcode field as follows: * * !3!3!2!2!2!2!2!2!2!2!2!2!1!1!1!1!1!1!1!1!1!1! ! ! ! ! ! ! ! ! ! ! * !1!0!9!8!7!6!5!4!3!2!1!0!9!8!7!6!5!4!3!2!1!0!9!8!7!6!5!4!3!2!1!0! * +-----------------------------------------------+---------------+ * ! C ! B ! A ! OP !Z!Y!X! * +-----------------------------------------------+---------------+ * * Some opcodes accept a reg/const argument which is handled by allocating * flags in the OP field, see DUK_BC_ISREG() and DUK_BC_ISCONST(). The * following convention is shared by most opcodes, so that the compiler * can handle reg/const flagging without opcode specific code paths: * * !3!3!2!2!2!2!2!2!2!2!2!2!1!1!1!1!1!1!1!1!1!1! ! ! ! ! ! ! ! ! ! ! * !1!0!9!8!7!6!5!4!3!2!1!0!9!8!7!6!5!4!3!2!1!0!9!8!7!6!5!4!3!2!1!0! * +-----------------------------------------------+---------------+ * ! C ! B ! A ! OP !Y!X! * +-----------------------------------------------+---------------+ * * X 1=B is const, 0=B is reg * Y 1=C is const, 0=C is reg * * In effect OP, OP + 1, OP + 2, and OP + 3 are allocated from the * 8-bit opcode space for a single logical opcode. The base opcode * number should be divisible by 4. If the opcode is called 'FOO' * the following opcode constants would be defined: * * DUK_OP_FOO 100 // base opcode number * DUK_OP_FOO_RR 100 // FOO, B=reg, C=reg * DUK_OP_FOO_CR 101 // FOO, B=const, C=reg * DUK_OP_FOO_RC 102 // FOO, B=reg, C=const * DUK_OP_FOO_CC 103 // FOO, B=const, C=const * * If only B or C is a reg/const, the unused opcode combinations can be * used for other opcodes (which take no reg/const argument). However, * such opcode values are initially reserved, at least while opcode space * is available. For example, if 'BAR' uses B for a register field and * C is a reg/const: * * DUK_OP_BAR 116 // base opcode number * DUK_OP_BAR_RR 116 // BAR, B=reg, C=reg * DUK_OP_BAR_CR_UNUSED 117 // unused, could be repurposed * DUK_OP_BAR_RC 118 // BAR, B=reg, C=const * DUK_OP_BAR_CC_UNUSED 119 // unused, could be repurposed * * Macro naming is a bit misleading, e.g. "ABC" in macro name but the * field layout is concretely "CBA" in the register. */ typedef duk_uint32_t duk_instr_t; #define DUK_BC_SHIFT_OP 0 #define DUK_BC_SHIFT_A 8 #define DUK_BC_SHIFT_B 16 #define DUK_BC_SHIFT_C 24 #define DUK_BC_SHIFT_BC DUK_BC_SHIFT_B #define DUK_BC_SHIFT_ABC DUK_BC_SHIFT_A #define DUK_BC_UNSHIFTED_MASK_OP 0xffUL #define DUK_BC_UNSHIFTED_MASK_A 0xffUL #define DUK_BC_UNSHIFTED_MASK_B 0xffUL #define DUK_BC_UNSHIFTED_MASK_C 0xffUL #define DUK_BC_UNSHIFTED_MASK_BC 0xffffUL #define DUK_BC_UNSHIFTED_MASK_ABC 0xffffffUL #define DUK_BC_SHIFTED_MASK_OP (DUK_BC_UNSHIFTED_MASK_OP << DUK_BC_SHIFT_OP) #define DUK_BC_SHIFTED_MASK_A (DUK_BC_UNSHIFTED_MASK_A << DUK_BC_SHIFT_A) #define DUK_BC_SHIFTED_MASK_B (DUK_BC_UNSHIFTED_MASK_B << DUK_BC_SHIFT_B) #define DUK_BC_SHIFTED_MASK_C (DUK_BC_UNSHIFTED_MASK_C << DUK_BC_SHIFT_C) #define DUK_BC_SHIFTED_MASK_BC (DUK_BC_UNSHIFTED_MASK_BC << DUK_BC_SHIFT_BC) #define DUK_BC_SHIFTED_MASK_ABC (DUK_BC_UNSHIFTED_MASK_ABC << DUK_BC_SHIFT_ABC) #define DUK_DEC_OP(x) ((x) & 0xffUL) #define DUK_DEC_A(x) (((x) >> 8) & 0xffUL) #define DUK_DEC_B(x) (((x) >> 16) & 0xffUL) #define DUK_DEC_C(x) (((x) >> 24) & 0xffUL) #define DUK_DEC_BC(x) (((x) >> 16) & 0xffffUL) #define DUK_DEC_ABC(x) (((x) >> 8) & 0xffffffUL) #define DUK_ENC_OP(op) ((duk_instr_t) (op)) #define DUK_ENC_OP_ABC(op,abc) ((duk_instr_t) ( \ (((duk_instr_t) (abc)) << 8) | \ ((duk_instr_t) (op)) \ )) #define DUK_ENC_OP_A_BC(op,a,bc) ((duk_instr_t) ( \ (((duk_instr_t) (bc)) << 16) | \ (((duk_instr_t) (a)) << 8) | \ ((duk_instr_t) (op)) \ )) #define DUK_ENC_OP_A_B_C(op,a,b,c) ((duk_instr_t) ( \ (((duk_instr_t) (c)) << 24) | \ (((duk_instr_t) (b)) << 16) | \ (((duk_instr_t) (a)) << 8) | \ ((duk_instr_t) (op)) \ )) #define DUK_ENC_OP_A_B(op,a,b) DUK_ENC_OP_A_B_C((op),(a),(b),0) #define DUK_ENC_OP_A(op,a) DUK_ENC_OP_A_B_C((op),(a),0,0) #define DUK_ENC_OP_BC(op,bc) DUK_ENC_OP_A_BC((op),0,(bc)) /* Get opcode base value with B/C reg/const flags cleared. */ #define DUK_BC_NOREGCONST_OP(op) ((op) & 0xfc) /* Constants should be signed so that signed arithmetic involving them * won't cause values to be coerced accidentally to unsigned. */ #define DUK_BC_OP_MIN 0 #define DUK_BC_OP_MAX 0xffL #define DUK_BC_A_MIN 0 #define DUK_BC_A_MAX 0xffL #define DUK_BC_B_MIN 0 #define DUK_BC_B_MAX 0xffL #define DUK_BC_C_MIN 0 #define DUK_BC_C_MAX 0xffL #define DUK_BC_BC_MIN 0 #define DUK_BC_BC_MAX 0xffffL #define DUK_BC_ABC_MIN 0 #define DUK_BC_ABC_MAX 0xffffffL /* Masks for B/C reg/const indicator in opcode field. */ #define DUK_BC_REGCONST_B (0x01UL) #define DUK_BC_REGCONST_C (0x02UL) /* Misc. masks for opcode field. */ #define DUK_BC_INCDECP_FLAG_DEC (0x04UL) #define DUK_BC_INCDECP_FLAG_POST (0x08UL) /* Opcodes. */ #define DUK_OP_LDREG 0 #define DUK_OP_STREG 1 #define DUK_OP_JUMP 2 #define DUK_OP_LDCONST 3 #define DUK_OP_LDINT 4 #define DUK_OP_LDINTX 5 #define DUK_OP_LDTHIS 6 #define DUK_OP_LDUNDEF 7 #define DUK_OP_LDNULL 8 #define DUK_OP_LDTRUE 9 #define DUK_OP_LDFALSE 10 #define DUK_OP_GETVAR 11 #define DUK_OP_BNOT 12 #define DUK_OP_LNOT 13 #define DUK_OP_UNM 14 #define DUK_OP_UNP 15 #define DUK_OP_EQ 16 #define DUK_OP_EQ_RR 16 #define DUK_OP_EQ_CR 17 #define DUK_OP_EQ_RC 18 #define DUK_OP_EQ_CC 19 #define DUK_OP_NEQ 20 #define DUK_OP_NEQ_RR 20 #define DUK_OP_NEQ_CR 21 #define DUK_OP_NEQ_RC 22 #define DUK_OP_NEQ_CC 23 #define DUK_OP_SEQ 24 #define DUK_OP_SEQ_RR 24 #define DUK_OP_SEQ_CR 25 #define DUK_OP_SEQ_RC 26 #define DUK_OP_SEQ_CC 27 #define DUK_OP_SNEQ 28 #define DUK_OP_SNEQ_RR 28 #define DUK_OP_SNEQ_CR 29 #define DUK_OP_SNEQ_RC 30 #define DUK_OP_SNEQ_CC 31 #define DUK_OP_GT 32 #define DUK_OP_GT_RR 32 #define DUK_OP_GT_CR 33 #define DUK_OP_GT_RC 34 #define DUK_OP_GT_CC 35 #define DUK_OP_GE 36 #define DUK_OP_GE_RR 36 #define DUK_OP_GE_CR 37 #define DUK_OP_GE_RC 38 #define DUK_OP_GE_CC 39 #define DUK_OP_LT 40 #define DUK_OP_LT_RR 40 #define DUK_OP_LT_CR 41 #define DUK_OP_LT_RC 42 #define DUK_OP_LT_CC 43 #define DUK_OP_LE 44 #define DUK_OP_LE_RR 44 #define DUK_OP_LE_CR 45 #define DUK_OP_LE_RC 46 #define DUK_OP_LE_CC 47 #define DUK_OP_IFTRUE 48 #define DUK_OP_IFTRUE_R 48 #define DUK_OP_IFTRUE_C 49 #define DUK_OP_IFFALSE 50 #define DUK_OP_IFFALSE_R 50 #define DUK_OP_IFFALSE_C 51 #define DUK_OP_ADD 52 #define DUK_OP_ADD_RR 52 #define DUK_OP_ADD_CR 53 #define DUK_OP_ADD_RC 54 #define DUK_OP_ADD_CC 55 #define DUK_OP_SUB 56 #define DUK_OP_SUB_RR 56 #define DUK_OP_SUB_CR 57 #define DUK_OP_SUB_RC 58 #define DUK_OP_SUB_CC 59 #define DUK_OP_MUL 60 #define DUK_OP_MUL_RR 60 #define DUK_OP_MUL_CR 61 #define DUK_OP_MUL_RC 62 #define DUK_OP_MUL_CC 63 #define DUK_OP_DIV 64 #define DUK_OP_DIV_RR 64 #define DUK_OP_DIV_CR 65 #define DUK_OP_DIV_RC 66 #define DUK_OP_DIV_CC 67 #define DUK_OP_MOD 68 #define DUK_OP_MOD_RR 68 #define DUK_OP_MOD_CR 69 #define DUK_OP_MOD_RC 70 #define DUK_OP_MOD_CC 71 #define DUK_OP_EXP 72 #define DUK_OP_EXP_RR 72 #define DUK_OP_EXP_CR 73 #define DUK_OP_EXP_RC 74 #define DUK_OP_EXP_CC 75 #define DUK_OP_BAND 76 #define DUK_OP_BAND_RR 76 #define DUK_OP_BAND_CR 77 #define DUK_OP_BAND_RC 78 #define DUK_OP_BAND_CC 79 #define DUK_OP_BOR 80 #define DUK_OP_BOR_RR 80 #define DUK_OP_BOR_CR 81 #define DUK_OP_BOR_RC 82 #define DUK_OP_BOR_CC 83 #define DUK_OP_BXOR 84 #define DUK_OP_BXOR_RR 84 #define DUK_OP_BXOR_CR 85 #define DUK_OP_BXOR_RC 86 #define DUK_OP_BXOR_CC 87 #define DUK_OP_BASL 88 #define DUK_OP_BASL_RR 88 #define DUK_OP_BASL_CR 89 #define DUK_OP_BASL_RC 90 #define DUK_OP_BASL_CC 91 #define DUK_OP_BLSR 92 #define DUK_OP_BLSR_RR 92 #define DUK_OP_BLSR_CR 93 #define DUK_OP_BLSR_RC 94 #define DUK_OP_BLSR_CC 95 #define DUK_OP_BASR 96 #define DUK_OP_BASR_RR 96 #define DUK_OP_BASR_CR 97 #define DUK_OP_BASR_RC 98 #define DUK_OP_BASR_CC 99 #define DUK_OP_INSTOF 100 #define DUK_OP_INSTOF_RR 100 #define DUK_OP_INSTOF_CR 101 #define DUK_OP_INSTOF_RC 102 #define DUK_OP_INSTOF_CC 103 #define DUK_OP_IN 104 #define DUK_OP_IN_RR 104 #define DUK_OP_IN_CR 105 #define DUK_OP_IN_RC 106 #define DUK_OP_IN_CC 107 #define DUK_OP_GETPROP 108 #define DUK_OP_GETPROP_RR 108 #define DUK_OP_GETPROP_CR 109 #define DUK_OP_GETPROP_RC 110 #define DUK_OP_GETPROP_CC 111 #define DUK_OP_PUTPROP 112 #define DUK_OP_PUTPROP_RR 112 #define DUK_OP_PUTPROP_CR 113 #define DUK_OP_PUTPROP_RC 114 #define DUK_OP_PUTPROP_CC 115 #define DUK_OP_DELPROP 116 #define DUK_OP_DELPROP_RR 116 #define DUK_OP_DELPROP_CR_UNUSED 117 /* unused now */ #define DUK_OP_DELPROP_RC 118 #define DUK_OP_DELPROP_CC_UNUSED 119 /* unused now */ #define DUK_OP_PREINCR 120 /* pre/post opcode values have constraints, */ #define DUK_OP_PREDECR 121 /* see duk_js_executor.c and duk_js_compiler.c. */ #define DUK_OP_POSTINCR 122 #define DUK_OP_POSTDECR 123 #define DUK_OP_PREINCV 124 #define DUK_OP_PREDECV 125 #define DUK_OP_POSTINCV 126 #define DUK_OP_POSTDECV 127 #define DUK_OP_PREINCP 128 /* pre/post inc/dec prop opcodes have constraints */ #define DUK_OP_PREINCP_RR 128 #define DUK_OP_PREINCP_CR 129 #define DUK_OP_PREINCP_RC 130 #define DUK_OP_PREINCP_CC 131 #define DUK_OP_PREDECP 132 #define DUK_OP_PREDECP_RR 132 #define DUK_OP_PREDECP_CR 133 #define DUK_OP_PREDECP_RC 134 #define DUK_OP_PREDECP_CC 135 #define DUK_OP_POSTINCP 136 #define DUK_OP_POSTINCP_RR 136 #define DUK_OP_POSTINCP_CR 137 #define DUK_OP_POSTINCP_RC 138 #define DUK_OP_POSTINCP_CC 139 #define DUK_OP_POSTDECP 140 #define DUK_OP_POSTDECP_RR 140 #define DUK_OP_POSTDECP_CR 141 #define DUK_OP_POSTDECP_RC 142 #define DUK_OP_POSTDECP_CC 143 #define DUK_OP_DECLVAR 144 #define DUK_OP_DECLVAR_RR 144 #define DUK_OP_DECLVAR_CR 145 #define DUK_OP_DECLVAR_RC 146 #define DUK_OP_DECLVAR_CC 147 #define DUK_OP_REGEXP 148 #define DUK_OP_REGEXP_RR 148 #define DUK_OP_REGEXP_CR 149 #define DUK_OP_REGEXP_RC 150 #define DUK_OP_REGEXP_CC 151 #define DUK_OP_CLOSURE 152 #define DUK_OP_TYPEOF 153 #define DUK_OP_TYPEOFID 154 #define DUK_OP_PUTVAR 155 #define DUK_OP_DELVAR 156 #define DUK_OP_RETREG 157 #define DUK_OP_RETUNDEF 158 #define DUK_OP_RETCONST 159 #define DUK_OP_RETCONSTN 160 /* return const without incref (e.g. number) */ #define DUK_OP_LABEL 161 #define DUK_OP_ENDLABEL 162 #define DUK_OP_BREAK 163 #define DUK_OP_CONTINUE 164 #define DUK_OP_TRYCATCH 165 #define DUK_OP_ENDTRY 166 #define DUK_OP_ENDCATCH 167 #define DUK_OP_ENDFIN 168 #define DUK_OP_THROW 169 #define DUK_OP_INVLHS 170 #define DUK_OP_CSREG 171 #define DUK_OP_CSVAR 172 #define DUK_OP_CSVAR_RR 172 #define DUK_OP_CSVAR_CR 173 #define DUK_OP_CSVAR_RC 174 #define DUK_OP_CSVAR_CC 175 #define DUK_OP_CALL0 176 /* DUK_OP_CALL0 & 0x0F must be zero. */ #define DUK_OP_CALL1 177 #define DUK_OP_CALL2 178 #define DUK_OP_CALL3 179 #define DUK_OP_CALL4 180 #define DUK_OP_CALL5 181 #define DUK_OP_CALL6 182 #define DUK_OP_CALL7 183 #define DUK_OP_CALL8 184 #define DUK_OP_CALL9 185 #define DUK_OP_CALL10 186 #define DUK_OP_CALL11 187 #define DUK_OP_CALL12 188 #define DUK_OP_CALL13 189 #define DUK_OP_CALL14 190 #define DUK_OP_CALL15 191 #define DUK_OP_NEWOBJ 192 #define DUK_OP_NEWARR 193 #define DUK_OP_MPUTOBJ 194 #define DUK_OP_MPUTOBJI 195 #define DUK_OP_INITSET 196 #define DUK_OP_INITGET 197 #define DUK_OP_MPUTARR 198 #define DUK_OP_MPUTARRI 199 #define DUK_OP_SETALEN 200 #define DUK_OP_INITENUM 201 #define DUK_OP_NEXTENUM 202 #define DUK_OP_NEWTARGET 203 #define DUK_OP_DEBUGGER 204 #define DUK_OP_NOP 205 #define DUK_OP_INVALID 206 #define DUK_OP_UNUSED207 207 #define DUK_OP_GETPROPC 208 #define DUK_OP_GETPROPC_RR 208 #define DUK_OP_GETPROPC_CR 209 #define DUK_OP_GETPROPC_RC 210 #define DUK_OP_GETPROPC_CC 211 #define DUK_OP_UNUSED212 212 #define DUK_OP_UNUSED213 213 #define DUK_OP_UNUSED214 214 #define DUK_OP_UNUSED215 215 #define DUK_OP_UNUSED216 216 #define DUK_OP_UNUSED217 217 #define DUK_OP_UNUSED218 218 #define DUK_OP_UNUSED219 219 #define DUK_OP_UNUSED220 220 #define DUK_OP_UNUSED221 221 #define DUK_OP_UNUSED222 222 #define DUK_OP_UNUSED223 223 #define DUK_OP_UNUSED224 224 #define DUK_OP_UNUSED225 225 #define DUK_OP_UNUSED226 226 #define DUK_OP_UNUSED227 227 #define DUK_OP_UNUSED228 228 #define DUK_OP_UNUSED229 229 #define DUK_OP_UNUSED230 230 #define DUK_OP_UNUSED231 231 #define DUK_OP_UNUSED232 232 #define DUK_OP_UNUSED233 233 #define DUK_OP_UNUSED234 234 #define DUK_OP_UNUSED235 235 #define DUK_OP_UNUSED236 236 #define DUK_OP_UNUSED237 237 #define DUK_OP_UNUSED238 238 #define DUK_OP_UNUSED239 239 #define DUK_OP_UNUSED240 240 #define DUK_OP_UNUSED241 241 #define DUK_OP_UNUSED242 242 #define DUK_OP_UNUSED243 243 #define DUK_OP_UNUSED244 244 #define DUK_OP_UNUSED245 245 #define DUK_OP_UNUSED246 246 #define DUK_OP_UNUSED247 247 #define DUK_OP_UNUSED248 248 #define DUK_OP_UNUSED249 249 #define DUK_OP_UNUSED250 250 #define DUK_OP_UNUSED251 251 #define DUK_OP_UNUSED252 252 #define DUK_OP_UNUSED253 253 #define DUK_OP_UNUSED254 254 #define DUK_OP_UNUSED255 255 #define DUK_OP_NONE 256 /* dummy value used as marker (doesn't fit in 8-bit field) */ /* XXX: Allocate flags from opcode field? Would take 16 opcode slots * but avoids shuffling in more cases. Maybe not worth it. */ /* DUK_OP_TRYCATCH flags in A. */ #define DUK_BC_TRYCATCH_FLAG_HAVE_CATCH (1U << 0) #define DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY (1U << 1) #define DUK_BC_TRYCATCH_FLAG_CATCH_BINDING (1U << 2) #define DUK_BC_TRYCATCH_FLAG_WITH_BINDING (1U << 3) /* DUK_OP_DECLVAR flags in A; bottom bits are reserved for propdesc flags * (DUK_PROPDESC_FLAG_XXX). */ #define DUK_BC_DECLVAR_FLAG_FUNC_DECL (1U << 4) /* function declaration */ /* DUK_OP_CALLn flags, part of opcode field. Three lowest bits must match * DUK_CALL_FLAG_xxx directly. */ #define DUK_BC_CALL_FLAG_TAILCALL (1U << 0) #define DUK_BC_CALL_FLAG_CONSTRUCT (1U << 1) #define DUK_BC_CALL_FLAG_CALLED_AS_EVAL (1U << 2) #define DUK_BC_CALL_FLAG_INDIRECT (1U << 3) /* Misc constants and helper macros. */ #define DUK_BC_LDINT_BIAS (1L << 15) #define DUK_BC_LDINTX_SHIFT 16 #define DUK_BC_JUMP_BIAS (1L << 23) #endif /* DUK_JS_BYTECODE_H_INCLUDED */ /* #include duk_lexer.h */ /* * Lexer defines. */ #if !defined(DUK_LEXER_H_INCLUDED) #define DUK_LEXER_H_INCLUDED typedef void (*duk_re_range_callback)(void *user, duk_codepoint_t r1, duk_codepoint_t r2, duk_bool_t direct); /* * A token is interpreted as any possible production of InputElementDiv * and InputElementRegExp, see E5 Section 7 in its entirety. Note that * the E5 "Token" production does not cover all actual tokens of the * language (which is explicitly stated in the specification, Section 7.5). * Null and boolean literals are defined as part of both ReservedWord * (E5 Section 7.6.1) and Literal (E5 Section 7.8) productions. Here, * null and boolean values have literal tokens, and are not reserved * words. * * Decimal literal negative/positive sign is -not- part of DUK_TOK_NUMBER. * The number tokens always have a non-negative value. The unary minus * operator in "-1.0" is optimized during compilation to yield a single * negative constant. * * Token numbering is free except that reserved words are required to be * in a continuous range and in a particular order. See genstrings.py. */ #define DUK_LEXER_INITCTX(ctx) duk_lexer_initctx((ctx)) #define DUK_LEXER_SETPOINT(ctx,pt) duk_lexer_setpoint((ctx), (pt)) #define DUK_LEXER_GETPOINT(ctx,pt) duk_lexer_getpoint((ctx), (pt)) /* Currently 6 characters of lookup are actually needed (duk_lexer.c). */ #define DUK_LEXER_WINDOW_SIZE 6 #if defined(DUK_USE_LEXER_SLIDING_WINDOW) #define DUK_LEXER_BUFFER_SIZE 64 #endif #define DUK_TOK_MINVAL 0 /* returned after EOF (infinite amount) */ #define DUK_TOK_EOF 0 /* identifier names (E5 Section 7.6) */ #define DUK_TOK_IDENTIFIER 1 /* reserved words: keywords */ #define DUK_TOK_START_RESERVED 2 #define DUK_TOK_BREAK 2 #define DUK_TOK_CASE 3 #define DUK_TOK_CATCH 4 #define DUK_TOK_CONTINUE 5 #define DUK_TOK_DEBUGGER 6 #define DUK_TOK_DEFAULT 7 #define DUK_TOK_DELETE 8 #define DUK_TOK_DO 9 #define DUK_TOK_ELSE 10 #define DUK_TOK_FINALLY 11 #define DUK_TOK_FOR 12 #define DUK_TOK_FUNCTION 13 #define DUK_TOK_IF 14 #define DUK_TOK_IN 15 #define DUK_TOK_INSTANCEOF 16 #define DUK_TOK_NEW 17 #define DUK_TOK_RETURN 18 #define DUK_TOK_SWITCH 19 #define DUK_TOK_THIS 20 #define DUK_TOK_THROW 21 #define DUK_TOK_TRY 22 #define DUK_TOK_TYPEOF 23 #define DUK_TOK_VAR 24 #define DUK_TOK_CONST 25 #define DUK_TOK_VOID 26 #define DUK_TOK_WHILE 27 #define DUK_TOK_WITH 28 /* reserved words: future reserved words */ #define DUK_TOK_CLASS 29 #define DUK_TOK_ENUM 30 #define DUK_TOK_EXPORT 31 #define DUK_TOK_EXTENDS 32 #define DUK_TOK_IMPORT 33 #define DUK_TOK_SUPER 34 /* "null", "true", and "false" are always reserved words. * Note that "get" and "set" are not! */ #define DUK_TOK_NULL 35 #define DUK_TOK_TRUE 36 #define DUK_TOK_FALSE 37 /* reserved words: additional future reserved words in strict mode */ #define DUK_TOK_START_STRICT_RESERVED 38 /* inclusive */ #define DUK_TOK_IMPLEMENTS 38 #define DUK_TOK_INTERFACE 39 #define DUK_TOK_LET 40 #define DUK_TOK_PACKAGE 41 #define DUK_TOK_PRIVATE 42 #define DUK_TOK_PROTECTED 43 #define DUK_TOK_PUBLIC 44 #define DUK_TOK_STATIC 45 #define DUK_TOK_YIELD 46 #define DUK_TOK_END_RESERVED 47 /* exclusive */ /* "get" and "set" are tokens but NOT ReservedWords. They are currently * parsed and identifiers and these defines are actually now unused. */ #define DUK_TOK_GET 47 #define DUK_TOK_SET 48 /* punctuators (unlike the spec, also includes "/" and "/=") */ #define DUK_TOK_LCURLY 49 #define DUK_TOK_RCURLY 50 #define DUK_TOK_LBRACKET 51 #define DUK_TOK_RBRACKET 52 #define DUK_TOK_LPAREN 53 #define DUK_TOK_RPAREN 54 #define DUK_TOK_PERIOD 55 #define DUK_TOK_SEMICOLON 56 #define DUK_TOK_COMMA 57 #define DUK_TOK_LT 58 #define DUK_TOK_GT 59 #define DUK_TOK_LE 60 #define DUK_TOK_GE 61 #define DUK_TOK_EQ 62 #define DUK_TOK_NEQ 63 #define DUK_TOK_SEQ 64 #define DUK_TOK_SNEQ 65 #define DUK_TOK_ADD 66 #define DUK_TOK_SUB 67 #define DUK_TOK_MUL 68 #define DUK_TOK_DIV 69 #define DUK_TOK_MOD 70 #define DUK_TOK_EXP 71 #define DUK_TOK_INCREMENT 72 #define DUK_TOK_DECREMENT 73 #define DUK_TOK_ALSHIFT 74 /* named "arithmetic" because result is signed */ #define DUK_TOK_ARSHIFT 75 #define DUK_TOK_RSHIFT 76 #define DUK_TOK_BAND 77 #define DUK_TOK_BOR 78 #define DUK_TOK_BXOR 79 #define DUK_TOK_LNOT 80 #define DUK_TOK_BNOT 81 #define DUK_TOK_LAND 82 #define DUK_TOK_LOR 83 #define DUK_TOK_QUESTION 84 #define DUK_TOK_COLON 85 #define DUK_TOK_EQUALSIGN 86 #define DUK_TOK_ADD_EQ 87 #define DUK_TOK_SUB_EQ 88 #define DUK_TOK_MUL_EQ 89 #define DUK_TOK_DIV_EQ 90 #define DUK_TOK_MOD_EQ 91 #define DUK_TOK_EXP_EQ 92 #define DUK_TOK_ALSHIFT_EQ 93 #define DUK_TOK_ARSHIFT_EQ 94 #define DUK_TOK_RSHIFT_EQ 95 #define DUK_TOK_BAND_EQ 96 #define DUK_TOK_BOR_EQ 97 #define DUK_TOK_BXOR_EQ 98 /* literals (E5 Section 7.8), except null, true, false, which are treated * like reserved words (above). */ #define DUK_TOK_NUMBER 99 #define DUK_TOK_STRING 100 #define DUK_TOK_REGEXP 101 #define DUK_TOK_MAXVAL 101 /* inclusive */ #define DUK_TOK_INVALID DUK_SMALL_UINT_MAX /* Convert heap string index to a token (reserved words) */ #define DUK_STRIDX_TO_TOK(x) ((x) - DUK_STRIDX_START_RESERVED + DUK_TOK_START_RESERVED) /* Sanity check */ #if (DUK_TOK_MAXVAL > 255) #error DUK_TOK_MAXVAL too large, code assumes it fits into 8 bits #endif /* Sanity checks for string and token defines */ #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_BREAK) != DUK_TOK_BREAK) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CASE) != DUK_TOK_CASE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CATCH) != DUK_TOK_CATCH) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CONTINUE) != DUK_TOK_CONTINUE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_DEBUGGER) != DUK_TOK_DEBUGGER) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_DEFAULT) != DUK_TOK_DEFAULT) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_DELETE) != DUK_TOK_DELETE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_DO) != DUK_TOK_DO) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_ELSE) != DUK_TOK_ELSE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_FINALLY) != DUK_TOK_FINALLY) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_FOR) != DUK_TOK_FOR) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_LC_FUNCTION) != DUK_TOK_FUNCTION) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_IF) != DUK_TOK_IF) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_IN) != DUK_TOK_IN) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_INSTANCEOF) != DUK_TOK_INSTANCEOF) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_NEW) != DUK_TOK_NEW) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_RETURN) != DUK_TOK_RETURN) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_SWITCH) != DUK_TOK_SWITCH) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_THIS) != DUK_TOK_THIS) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_THROW) != DUK_TOK_THROW) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_TRY) != DUK_TOK_TRY) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_TYPEOF) != DUK_TOK_TYPEOF) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_VAR) != DUK_TOK_VAR) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_VOID) != DUK_TOK_VOID) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_WHILE) != DUK_TOK_WHILE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_WITH) != DUK_TOK_WITH) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CLASS) != DUK_TOK_CLASS) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CONST) != DUK_TOK_CONST) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_ENUM) != DUK_TOK_ENUM) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_EXPORT) != DUK_TOK_EXPORT) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_EXTENDS) != DUK_TOK_EXTENDS) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_IMPORT) != DUK_TOK_IMPORT) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_SUPER) != DUK_TOK_SUPER) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_LC_NULL) != DUK_TOK_NULL) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_TRUE) != DUK_TOK_TRUE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_FALSE) != DUK_TOK_FALSE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_IMPLEMENTS) != DUK_TOK_IMPLEMENTS) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_INTERFACE) != DUK_TOK_INTERFACE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_LET) != DUK_TOK_LET) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_PACKAGE) != DUK_TOK_PACKAGE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_PRIVATE) != DUK_TOK_PRIVATE) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_PROTECTED) != DUK_TOK_PROTECTED) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_PUBLIC) != DUK_TOK_PUBLIC) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_STATIC) != DUK_TOK_STATIC) #error mismatch in token defines #endif #if (DUK_STRIDX_TO_TOK(DUK_STRIDX_YIELD) != DUK_TOK_YIELD) #error mismatch in token defines #endif /* Regexp tokens */ #define DUK_RETOK_EOF 0 #define DUK_RETOK_DISJUNCTION 1 #define DUK_RETOK_QUANTIFIER 2 #define DUK_RETOK_ASSERT_START 3 #define DUK_RETOK_ASSERT_END 4 #define DUK_RETOK_ASSERT_WORD_BOUNDARY 5 #define DUK_RETOK_ASSERT_NOT_WORD_BOUNDARY 6 #define DUK_RETOK_ASSERT_START_POS_LOOKAHEAD 7 #define DUK_RETOK_ASSERT_START_NEG_LOOKAHEAD 8 #define DUK_RETOK_ATOM_PERIOD 9 #define DUK_RETOK_ATOM_CHAR 10 #define DUK_RETOK_ATOM_DIGIT 11 /* assumptions in regexp compiler */ #define DUK_RETOK_ATOM_NOT_DIGIT 12 /* -""- */ #define DUK_RETOK_ATOM_WHITE 13 /* -""- */ #define DUK_RETOK_ATOM_NOT_WHITE 14 /* -""- */ #define DUK_RETOK_ATOM_WORD_CHAR 15 /* -""- */ #define DUK_RETOK_ATOM_NOT_WORD_CHAR 16 /* -""- */ #define DUK_RETOK_ATOM_BACKREFERENCE 17 #define DUK_RETOK_ATOM_START_CAPTURE_GROUP 18 #define DUK_RETOK_ATOM_START_NONCAPTURE_GROUP 19 #define DUK_RETOK_ATOM_START_CHARCLASS 20 #define DUK_RETOK_ATOM_START_CHARCLASS_INVERTED 21 #define DUK_RETOK_ATOM_END_GROUP 22 /* Constants for duk_lexer_ctx.buf. */ #define DUK_LEXER_TEMP_BUF_LIMIT 256 /* A token value. Can be memcpy()'d, but note that slot1/slot2 values are on the valstack. * Some fields (like num, str1, str2) are only valid for specific token types and may have * stale values otherwise. */ struct duk_token { duk_small_uint_t t; /* token type (with reserved word identification) */ duk_small_uint_t t_nores; /* token type (with reserved words as DUK_TOK_IDENTIFER) */ duk_double_t num; /* numeric value of token */ duk_hstring *str1; /* string 1 of token (borrowed, stored to ctx->slot1_idx) */ duk_hstring *str2; /* string 2 of token (borrowed, stored to ctx->slot2_idx) */ duk_size_t start_offset; /* start byte offset of token in lexer input */ duk_int_t start_line; /* start line of token (first char) */ duk_int_t num_escapes; /* number of escapes and line continuations (for directive prologue) */ duk_bool_t lineterm; /* token was preceded by a lineterm */ duk_bool_t allow_auto_semi; /* token allows automatic semicolon insertion (eof or preceded by newline) */ }; #define DUK_RE_QUANTIFIER_INFINITE ((duk_uint32_t) 0xffffffffUL) /* A regexp token value. */ struct duk_re_token { duk_small_uint_t t; /* token type */ duk_small_uint_t greedy; duk_uint32_t num; /* numeric value (character, count) */ duk_uint32_t qmin; duk_uint32_t qmax; }; /* A structure for 'snapshotting' a point for rewinding */ struct duk_lexer_point { duk_size_t offset; duk_int_t line; }; /* Lexer codepoint with additional info like offset/line number */ struct duk_lexer_codepoint { duk_codepoint_t codepoint; duk_size_t offset; duk_int_t line; }; /* Lexer context. Same context is used for ECMAScript and Regexp parsing. */ struct duk_lexer_ctx { #if defined(DUK_USE_LEXER_SLIDING_WINDOW) duk_lexer_codepoint *window; /* unicode code points, window[0] is always next, points to 'buffer' */ duk_lexer_codepoint buffer[DUK_LEXER_BUFFER_SIZE]; #else duk_lexer_codepoint window[DUK_LEXER_WINDOW_SIZE]; /* unicode code points, window[0] is always next */ #endif duk_hthread *thr; /* thread; minimizes argument passing */ const duk_uint8_t *input; /* input string (may be a user pointer) */ duk_size_t input_length; /* input byte length */ duk_size_t input_offset; /* input offset for window leading edge (not window[0]) */ duk_int_t input_line; /* input linenumber at input_offset (not window[0]), init to 1 */ duk_idx_t slot1_idx; /* valstack slot for 1st token value */ duk_idx_t slot2_idx; /* valstack slot for 2nd token value */ duk_idx_t buf_idx; /* valstack slot for temp buffer */ duk_hbuffer_dynamic *buf; /* temp accumulation buffer */ duk_bufwriter_ctx bw; /* bufwriter for temp accumulation */ duk_int_t token_count; /* number of tokens parsed */ duk_int_t token_limit; /* maximum token count before error (sanity backstop) */ duk_small_uint_t flags; /* lexer flags, use compiler flag defines for now */ }; /* * Prototypes */ DUK_INTERNAL_DECL void duk_lexer_initctx(duk_lexer_ctx *lex_ctx); DUK_INTERNAL_DECL void duk_lexer_getpoint(duk_lexer_ctx *lex_ctx, duk_lexer_point *pt); DUK_INTERNAL_DECL void duk_lexer_setpoint(duk_lexer_ctx *lex_ctx, duk_lexer_point *pt); DUK_INTERNAL_DECL void duk_lexer_parse_js_input_element(duk_lexer_ctx *lex_ctx, duk_token *out_token, duk_bool_t strict_mode, duk_bool_t regexp_mode); #if defined(DUK_USE_REGEXP_SUPPORT) DUK_INTERNAL_DECL void duk_lexer_parse_re_token(duk_lexer_ctx *lex_ctx, duk_re_token *out_token); DUK_INTERNAL_DECL void duk_lexer_parse_re_ranges(duk_lexer_ctx *lex_ctx, duk_re_range_callback gen_range, void *userdata); #endif /* DUK_USE_REGEXP_SUPPORT */ #endif /* DUK_LEXER_H_INCLUDED */ /* #include duk_js_compiler.h */ /* * ECMAScript compiler. */ #if !defined(DUK_JS_COMPILER_H_INCLUDED) #define DUK_JS_COMPILER_H_INCLUDED /* ECMAScript compiler limits */ #define DUK_COMPILER_TOKEN_LIMIT 100000000L /* 1e8: protects against deeply nested inner functions */ /* maximum loopcount for peephole optimization */ #define DUK_COMPILER_PEEPHOLE_MAXITER 3 /* maximum bytecode length in instructions */ #define DUK_COMPILER_MAX_BYTECODE_LENGTH (256L * 1024L * 1024L) /* 1 GB */ /* * Compiler intermediate values * * Intermediate values describe either plain values (e.g. strings or * numbers) or binary operations which have not yet been coerced into * either a left-hand-side or right-hand-side role (e.g. object property). */ #define DUK_IVAL_NONE 0 /* no value */ #define DUK_IVAL_PLAIN 1 /* register, constant, or value */ #define DUK_IVAL_ARITH 2 /* binary arithmetic; DUK_OP_ADD, DUK_OP_EQ, other binary ops */ #define DUK_IVAL_PROP 3 /* property access */ #define DUK_IVAL_VAR 4 /* variable access */ #define DUK_ISPEC_NONE 0 /* no value */ #define DUK_ISPEC_VALUE 1 /* value resides in 'valstack_idx' */ #define DUK_ISPEC_REGCONST 2 /* value resides in a register or constant */ /* Bit mask which indicates that a regconst is a constant instead of a register. * Chosen so that when a regconst is cast to duk_int32_t, all consts are * negative values. */ #define DUK_REGCONST_CONST_MARKER DUK_INT32_MIN /* = -0x80000000 */ /* Type to represent a reg/const reference during compilation, with <0 * indicating a constant. Some call sites also use -1 to indicate 'none'. */ typedef duk_int32_t duk_regconst_t; typedef struct { duk_small_uint_t t; /* DUK_ISPEC_XXX */ duk_regconst_t regconst; duk_idx_t valstack_idx; /* always set; points to a reserved valstack slot */ } duk_ispec; typedef struct { /* * PLAIN: x1 * ARITH: x1 x2 * PROP: x1.x2 * VAR: x1 (name) */ /* XXX: can be optimized for smaller footprint esp. on 32-bit environments */ duk_small_uint_t t; /* DUK_IVAL_XXX */ duk_small_uint_t op; /* bytecode opcode for binary ops */ duk_ispec x1; duk_ispec x2; } duk_ivalue; /* * Bytecode instruction representation during compilation * * Contains the actual instruction and (optionally) debug info. */ struct duk_compiler_instr { duk_instr_t ins; #if defined(DUK_USE_PC2LINE) duk_uint32_t line; #endif }; /* * Compiler state */ #define DUK_LABEL_FLAG_ALLOW_BREAK (1U << 0) #define DUK_LABEL_FLAG_ALLOW_CONTINUE (1U << 1) #define DUK_DECL_TYPE_VAR 0 #define DUK_DECL_TYPE_FUNC 1 /* XXX: optimize to 16 bytes */ typedef struct { duk_small_uint_t flags; duk_int_t label_id; /* numeric label_id (-1 reserved as marker) */ duk_hstring *h_label; /* borrowed label name */ duk_int_t catch_depth; /* catch depth at point of definition */ duk_int_t pc_label; /* pc of label statement: * pc+1: break jump site * pc+2: continue jump site */ /* Fast jumps (which avoid longjmp) jump directly to the jump sites * which are always known even while the iteration/switch statement * is still being parsed. A final peephole pass "straightens out" * the jumps. */ } duk_labelinfo; /* Compiling state of one function, eventually converted to duk_hcompfunc */ struct duk_compiler_func { /* These pointers are at the start of the struct so that they pack * nicely. Mixing pointers and integer values is bad on some * platforms (e.g. if int is 32 bits and pointers are 64 bits). */ duk_bufwriter_ctx bw_code; /* bufwriter for code */ duk_hstring *h_name; /* function name (borrowed reference), ends up in _name */ /* h_code: held in bw_code */ duk_hobject *h_consts; /* array */ duk_hobject *h_funcs; /* array of function templates: [func1, offset1, line1, func2, offset2, line2] * offset/line points to closing brace to allow skipping on pass 2 */ duk_hobject *h_decls; /* array of declarations: [ name1, val1, name2, val2, ... ] * valN = (typeN) | (fnum << 8), where fnum is inner func number (0 for vars) * record function and variable declarations in pass 1 */ duk_hobject *h_labelnames; /* array of active label names */ duk_hbuffer_dynamic *h_labelinfos; /* C array of duk_labelinfo */ duk_hobject *h_argnames; /* array of formal argument names (-> _Formals) */ duk_hobject *h_varmap; /* variable map for pass 2 (identifier -> register number or null (unmapped)) */ /* Value stack indices for tracking objects. */ /* code_idx: not needed */ duk_idx_t consts_idx; duk_idx_t funcs_idx; duk_idx_t decls_idx; duk_idx_t labelnames_idx; duk_idx_t labelinfos_idx; duk_idx_t argnames_idx; duk_idx_t varmap_idx; /* Temp reg handling. */ duk_regconst_t temp_first; /* first register that is a temporary (below: variables) */ duk_regconst_t temp_next; /* next temporary register to allocate */ duk_regconst_t temp_max; /* highest value of temp_reg (temp_max - 1 is highest used reg) */ /* Shuffle registers if large number of regs/consts. */ duk_regconst_t shuffle1; duk_regconst_t shuffle2; duk_regconst_t shuffle3; /* Stats for current expression being parsed. */ duk_int_t nud_count; duk_int_t led_count; duk_int_t paren_level; /* parenthesis count, 0 = top level */ duk_bool_t expr_lhs; /* expression is left-hand-side compatible */ duk_bool_t allow_in; /* current paren level allows 'in' token */ /* Misc. */ duk_int_t stmt_next; /* statement id allocation (running counter) */ duk_int_t label_next; /* label id allocation (running counter) */ duk_int_t catch_depth; /* catch stack depth */ duk_int_t with_depth; /* with stack depth (affects identifier lookups) */ duk_int_t fnum_next; /* inner function numbering */ duk_int_t num_formals; /* number of formal arguments */ duk_regconst_t reg_stmt_value; /* register for writing value of 'non-empty' statements (global or eval code), -1 is marker */ #if defined(DUK_USE_DEBUGGER_SUPPORT) duk_int_t min_line; /* XXX: typing (duk_hcompfunc has duk_uint32_t) */ duk_int_t max_line; #endif /* Status booleans. */ duk_uint8_t is_function; /* is an actual function (not global/eval code) */ duk_uint8_t is_eval; /* is eval code */ duk_uint8_t is_global; /* is global code */ duk_uint8_t is_namebinding; /* needs a name binding */ duk_uint8_t is_constructable; /* result is constructable */ duk_uint8_t is_setget; /* is a setter/getter */ duk_uint8_t is_strict; /* function is strict */ duk_uint8_t is_notail; /* function must not be tail called */ duk_uint8_t in_directive_prologue; /* parsing in "directive prologue", recognize directives */ duk_uint8_t in_scanning; /* parsing in "scanning" phase (first pass) */ duk_uint8_t may_direct_eval; /* function may call direct eval */ duk_uint8_t id_access_arguments; /* function refers to 'arguments' identifier */ duk_uint8_t id_access_slow; /* function makes one or more slow path accesses that won't match own static variables */ duk_uint8_t id_access_slow_own; /* function makes one or more slow path accesses that may match own static variables */ duk_uint8_t is_arguments_shadowed; /* argument/function declaration shadows 'arguments' */ duk_uint8_t needs_shuffle; /* function needs shuffle registers */ duk_uint8_t reject_regexp_in_adv; /* reject RegExp literal on next advance() call; needed for handling IdentifierName productions */ duk_uint8_t allow_regexp_in_adv; /* allow RegExp literal on next advance() call */ }; struct duk_compiler_ctx { duk_hthread *thr; /* filename being compiled (ends up in functions' '_filename' property) */ duk_hstring *h_filename; /* borrowed reference */ /* lexing (tokenization) state (contains two valstack slot indices) */ duk_lexer_ctx lex; /* current and previous token for parsing */ duk_token prev_token; duk_token curr_token; duk_idx_t tok11_idx; /* curr_token slot1 (matches 'lex' slot1_idx) */ duk_idx_t tok12_idx; /* curr_token slot2 (matches 'lex' slot2_idx) */ duk_idx_t tok21_idx; /* prev_token slot1 */ duk_idx_t tok22_idx; /* prev_token slot2 */ /* recursion limit */ duk_int_t recursion_depth; duk_int_t recursion_limit; /* code emission temporary */ duk_int_t emit_jumpslot_pc; /* current function being compiled (embedded instead of pointer for more compact access) */ duk_compiler_func curr_func; }; /* * Prototypes */ DUK_INTERNAL_DECL void duk_js_compile(duk_hthread *thr, const duk_uint8_t *src_buffer, duk_size_t src_length, duk_small_uint_t flags); #endif /* DUK_JS_COMPILER_H_INCLUDED */ /* #include duk_regexp.h */ /* * Regular expression structs, constants, and bytecode defines. */ #if !defined(DUK_REGEXP_H_INCLUDED) #define DUK_REGEXP_H_INCLUDED /* maximum bytecode copies for {n,m} quantifiers */ #define DUK_RE_MAX_ATOM_COPIES 1000 /* regexp compilation limits */ #define DUK_RE_COMPILE_TOKEN_LIMIT 100000000L /* 1e8 */ /* regexp execution limits */ #define DUK_RE_EXECUTE_STEPS_LIMIT 1000000000L /* 1e9 */ /* regexp opcodes */ #define DUK_REOP_MATCH 1 #define DUK_REOP_CHAR 2 #define DUK_REOP_PERIOD 3 #define DUK_REOP_RANGES 4 #define DUK_REOP_INVRANGES 5 #define DUK_REOP_JUMP 6 #define DUK_REOP_SPLIT1 7 #define DUK_REOP_SPLIT2 8 #define DUK_REOP_SQMINIMAL 9 #define DUK_REOP_SQGREEDY 10 #define DUK_REOP_SAVE 11 #define DUK_REOP_WIPERANGE 12 #define DUK_REOP_LOOKPOS 13 #define DUK_REOP_LOOKNEG 14 #define DUK_REOP_BACKREFERENCE 15 #define DUK_REOP_ASSERT_START 16 #define DUK_REOP_ASSERT_END 17 #define DUK_REOP_ASSERT_WORD_BOUNDARY 18 #define DUK_REOP_ASSERT_NOT_WORD_BOUNDARY 19 /* flags */ #define DUK_RE_FLAG_GLOBAL (1U << 0) #define DUK_RE_FLAG_IGNORE_CASE (1U << 1) #define DUK_RE_FLAG_MULTILINE (1U << 2) struct duk_re_matcher_ctx { duk_hthread *thr; duk_uint32_t re_flags; const duk_uint8_t *input; const duk_uint8_t *input_end; const duk_uint8_t *bytecode; const duk_uint8_t *bytecode_end; const duk_uint8_t **saved; /* allocated from valstack (fixed buffer) */ duk_uint32_t nsaved; duk_uint32_t recursion_depth; duk_uint32_t recursion_limit; duk_uint32_t steps_count; duk_uint32_t steps_limit; }; struct duk_re_compiler_ctx { duk_hthread *thr; duk_uint32_t re_flags; duk_lexer_ctx lex; duk_re_token curr_token; duk_bufwriter_ctx bw; duk_uint32_t captures; /* highest capture number emitted so far (used as: ++captures) */ duk_uint32_t highest_backref; duk_uint32_t recursion_depth; duk_uint32_t recursion_limit; duk_uint32_t nranges; /* internal temporary value, used for char classes */ }; /* * Prototypes */ #if defined(DUK_USE_REGEXP_SUPPORT) DUK_INTERNAL_DECL void duk_regexp_compile(duk_hthread *thr); DUK_INTERNAL_DECL void duk_regexp_create_instance(duk_hthread *thr); DUK_INTERNAL_DECL void duk_regexp_match(duk_hthread *thr); DUK_INTERNAL_DECL void duk_regexp_match_force_global(duk_hthread *thr); /* hacky helper for String.prototype.split() */ #endif #endif /* DUK_REGEXP_H_INCLUDED */ /* #include duk_heaphdr.h */ /* * Heap header definition and assorted macros, including ref counting. * Access all fields through the accessor macros. */ #if !defined(DUK_HEAPHDR_H_INCLUDED) #define DUK_HEAPHDR_H_INCLUDED /* * Common heap header * * All heap objects share the same flags and refcount fields. Objects other * than strings also need to have a single or double linked list pointers * for insertion into the "heap allocated" list. Strings have single linked * list pointers for string table chaining. * * Technically, 'h_refcount' must be wide enough to guarantee that it cannot * wrap; otherwise objects might be freed incorrectly after wrapping. The * default refcount field is 32 bits even on 64-bit systems: while that's in * theory incorrect, the Duktape heap needs to be larger than 64GB for the * count to actually wrap (assuming 16-byte duk_tvals). This is very unlikely * to ever be an issue, but if it is, disabling DUK_USE_REFCOUNT32 causes * Duktape to use size_t for refcounts which should always be safe. * * Heap header size on 32-bit platforms: 8 bytes without reference counting, * 16 bytes with reference counting. * * Note that 'raw' macros such as DUK_HEAPHDR_GET_REFCOUNT() are not * defined without DUK_USE_REFERENCE_COUNTING, so caller must #if defined() * around them. */ /* XXX: macro for shared header fields (avoids some padding issues) */ struct duk_heaphdr { duk_uint32_t h_flags; #if defined(DUK_USE_REFERENCE_COUNTING) #if defined(DUK_USE_ASSERTIONS) /* When assertions enabled, used by mark-and-sweep for refcount * validation. Largest reasonable type; also detects overflows. */ duk_size_t h_assert_refcount; #endif #if defined(DUK_USE_REFCOUNT16) duk_uint16_t h_refcount; #elif defined(DUK_USE_REFCOUNT32) duk_uint32_t h_refcount; #else duk_size_t h_refcount; #endif #endif /* DUK_USE_REFERENCE_COUNTING */ #if defined(DUK_USE_HEAPPTR16) duk_uint16_t h_next16; #else duk_heaphdr *h_next; #endif #if defined(DUK_USE_DOUBLE_LINKED_HEAP) /* refcounting requires direct heap frees, which in turn requires a dual linked heap */ #if defined(DUK_USE_HEAPPTR16) duk_uint16_t h_prev16; #else duk_heaphdr *h_prev; #endif #endif /* When DUK_USE_HEAPPTR16 (and DUK_USE_REFCOUNT16) is in use, the * struct won't align nicely to 4 bytes. This 16-bit extra field * is added to make the alignment clean; the field can be used by * heap objects when 16-bit packing is used. This field is now * conditional to DUK_USE_HEAPPTR16 only, but it is intended to be * used with DUK_USE_REFCOUNT16 and DUK_USE_DOUBLE_LINKED_HEAP; * this only matter to low memory environments anyway. */ #if defined(DUK_USE_HEAPPTR16) duk_uint16_t h_extra16; #endif }; struct duk_heaphdr_string { /* 16 bits would be enough for shared heaphdr flags and duk_hstring * flags. The initial parts of duk_heaphdr_string and duk_heaphdr * must match so changing the flags field size here would be quite * awkward. However, to minimize struct size, we can pack at least * 16 bits of duk_hstring data into the flags field. */ duk_uint32_t h_flags; #if defined(DUK_USE_REFERENCE_COUNTING) #if defined(DUK_USE_ASSERTIONS) /* When assertions enabled, used by mark-and-sweep for refcount * validation. Largest reasonable type; also detects overflows. */ duk_size_t h_assert_refcount; #endif #if defined(DUK_USE_REFCOUNT16) duk_uint16_t h_refcount; duk_uint16_t h_strextra16; /* round out to 8 bytes */ #elif defined(DUK_USE_REFCOUNT32) duk_uint32_t h_refcount; #else duk_size_t h_refcount; #endif #else duk_uint16_t h_strextra16; #endif /* DUK_USE_REFERENCE_COUNTING */ duk_hstring *h_next; /* No 'h_prev' pointer for strings. */ }; #define DUK_HEAPHDR_FLAGS_TYPE_MASK 0x00000003UL #define DUK_HEAPHDR_FLAGS_FLAG_MASK (~DUK_HEAPHDR_FLAGS_TYPE_MASK) /* 2 bits for heap type */ #define DUK_HEAPHDR_FLAGS_HEAP_START 2 /* 5 heap flags */ #define DUK_HEAPHDR_FLAGS_USER_START 7 /* 25 user flags */ #define DUK_HEAPHDR_HEAP_FLAG_NUMBER(n) (DUK_HEAPHDR_FLAGS_HEAP_START + (n)) #define DUK_HEAPHDR_USER_FLAG_NUMBER(n) (DUK_HEAPHDR_FLAGS_USER_START + (n)) #define DUK_HEAPHDR_HEAP_FLAG(n) (1UL << (DUK_HEAPHDR_FLAGS_HEAP_START + (n))) #define DUK_HEAPHDR_USER_FLAG(n) (1UL << (DUK_HEAPHDR_FLAGS_USER_START + (n))) #define DUK_HEAPHDR_FLAG_REACHABLE DUK_HEAPHDR_HEAP_FLAG(0) /* mark-and-sweep: reachable */ #define DUK_HEAPHDR_FLAG_TEMPROOT DUK_HEAPHDR_HEAP_FLAG(1) /* mark-and-sweep: children not processed */ #define DUK_HEAPHDR_FLAG_FINALIZABLE DUK_HEAPHDR_HEAP_FLAG(2) /* mark-and-sweep: finalizable (on current pass) */ #define DUK_HEAPHDR_FLAG_FINALIZED DUK_HEAPHDR_HEAP_FLAG(3) /* mark-and-sweep: finalized (on previous pass) */ #define DUK_HEAPHDR_FLAG_READONLY DUK_HEAPHDR_HEAP_FLAG(4) /* read-only object, in code section */ #define DUK_HTYPE_MIN 0 #define DUK_HTYPE_STRING 0 #define DUK_HTYPE_OBJECT 1 #define DUK_HTYPE_BUFFER 2 #define DUK_HTYPE_MAX 2 #if defined(DUK_USE_HEAPPTR16) #define DUK_HEAPHDR_GET_NEXT(heap,h) \ ((duk_heaphdr *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->h_next16)) #define DUK_HEAPHDR_SET_NEXT(heap,h,val) do { \ (h)->h_next16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) val); \ } while (0) #else #define DUK_HEAPHDR_GET_NEXT(heap,h) ((h)->h_next) #define DUK_HEAPHDR_SET_NEXT(heap,h,val) do { \ (h)->h_next = (val); \ } while (0) #endif #if defined(DUK_USE_DOUBLE_LINKED_HEAP) #if defined(DUK_USE_HEAPPTR16) #define DUK_HEAPHDR_GET_PREV(heap,h) \ ((duk_heaphdr *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->h_prev16)) #define DUK_HEAPHDR_SET_PREV(heap,h,val) do { \ (h)->h_prev16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (val)); \ } while (0) #else #define DUK_HEAPHDR_GET_PREV(heap,h) ((h)->h_prev) #define DUK_HEAPHDR_SET_PREV(heap,h,val) do { \ (h)->h_prev = (val); \ } while (0) #endif #endif #if defined(DUK_USE_REFERENCE_COUNTING) #define DUK_HEAPHDR_GET_REFCOUNT(h) ((h)->h_refcount) #define DUK_HEAPHDR_SET_REFCOUNT(h,val) do { \ (h)->h_refcount = (val); \ DUK_ASSERT((h)->h_refcount == (val)); /* No truncation. */ \ } while (0) #define DUK_HEAPHDR_PREINC_REFCOUNT(h) (++(h)->h_refcount) /* result: updated refcount */ #define DUK_HEAPHDR_PREDEC_REFCOUNT(h) (--(h)->h_refcount) /* result: updated refcount */ #else /* refcount macros not defined without refcounting, caller must #if defined() now */ #endif /* DUK_USE_REFERENCE_COUNTING */ /* * Note: type is treated as a field separate from flags, so some masking is * involved in the macros below. */ #define DUK_HEAPHDR_GET_FLAGS_RAW(h) ((h)->h_flags) #define DUK_HEAPHDR_SET_FLAGS_RAW(h,val) do { \ (h)->h_flags = (val); } \ } #define DUK_HEAPHDR_GET_FLAGS(h) ((h)->h_flags & DUK_HEAPHDR_FLAGS_FLAG_MASK) #define DUK_HEAPHDR_SET_FLAGS(h,val) do { \ (h)->h_flags = ((h)->h_flags & ~(DUK_HEAPHDR_FLAGS_FLAG_MASK)) | (val); \ } while (0) #define DUK_HEAPHDR_GET_TYPE(h) ((h)->h_flags & DUK_HEAPHDR_FLAGS_TYPE_MASK) #define DUK_HEAPHDR_SET_TYPE(h,val) do { \ (h)->h_flags = ((h)->h_flags & ~(DUK_HEAPHDR_FLAGS_TYPE_MASK)) | (val); \ } while (0) /* Comparison for type >= DUK_HTYPE_MIN skipped; because DUK_HTYPE_MIN is zero * and the comparison is unsigned, it's always true and generates warnings. */ #define DUK_HEAPHDR_HTYPE_VALID(h) ( \ DUK_HEAPHDR_GET_TYPE((h)) <= DUK_HTYPE_MAX \ ) #define DUK_HEAPHDR_SET_TYPE_AND_FLAGS(h,tval,fval) do { \ (h)->h_flags = ((tval) & DUK_HEAPHDR_FLAGS_TYPE_MASK) | \ ((fval) & DUK_HEAPHDR_FLAGS_FLAG_MASK); \ } while (0) #define DUK_HEAPHDR_SET_FLAG_BITS(h,bits) do { \ DUK_ASSERT(((bits) & ~(DUK_HEAPHDR_FLAGS_FLAG_MASK)) == 0); \ (h)->h_flags |= (bits); \ } while (0) #define DUK_HEAPHDR_CLEAR_FLAG_BITS(h,bits) do { \ DUK_ASSERT(((bits) & ~(DUK_HEAPHDR_FLAGS_FLAG_MASK)) == 0); \ (h)->h_flags &= ~((bits)); \ } while (0) #define DUK_HEAPHDR_CHECK_FLAG_BITS(h,bits) (((h)->h_flags & (bits)) != 0) #define DUK_HEAPHDR_SET_REACHABLE(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_REACHABLE) #define DUK_HEAPHDR_CLEAR_REACHABLE(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_REACHABLE) #define DUK_HEAPHDR_HAS_REACHABLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_REACHABLE) #define DUK_HEAPHDR_SET_TEMPROOT(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_TEMPROOT) #define DUK_HEAPHDR_CLEAR_TEMPROOT(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_TEMPROOT) #define DUK_HEAPHDR_HAS_TEMPROOT(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_TEMPROOT) #define DUK_HEAPHDR_SET_FINALIZABLE(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZABLE) #define DUK_HEAPHDR_CLEAR_FINALIZABLE(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZABLE) #define DUK_HEAPHDR_HAS_FINALIZABLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZABLE) #define DUK_HEAPHDR_SET_FINALIZED(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZED) #define DUK_HEAPHDR_CLEAR_FINALIZED(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZED) #define DUK_HEAPHDR_HAS_FINALIZED(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZED) #define DUK_HEAPHDR_SET_READONLY(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_READONLY) #define DUK_HEAPHDR_CLEAR_READONLY(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_READONLY) #define DUK_HEAPHDR_HAS_READONLY(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_READONLY) /* get or set a range of flags; m=first bit number, n=number of bits */ #define DUK_HEAPHDR_GET_FLAG_RANGE(h,m,n) (((h)->h_flags >> (m)) & ((1UL << (n)) - 1UL)) #define DUK_HEAPHDR_SET_FLAG_RANGE(h,m,n,v) do { \ (h)->h_flags = \ ((h)->h_flags & (~(((1UL << (n)) - 1UL) << (m)))) \ | ((v) << (m)); \ } while (0) /* init pointer fields to null */ #if defined(DUK_USE_DOUBLE_LINKED_HEAP) #define DUK_HEAPHDR_INIT_NULLS(h) do { \ DUK_HEAPHDR_SET_NEXT((h), (void *) NULL); \ DUK_HEAPHDR_SET_PREV((h), (void *) NULL); \ } while (0) #else #define DUK_HEAPHDR_INIT_NULLS(h) do { \ DUK_HEAPHDR_SET_NEXT((h), (void *) NULL); \ } while (0) #endif #define DUK_HEAPHDR_STRING_INIT_NULLS(h) do { \ (h)->h_next = NULL; \ } while (0) /* * Type tests */ /* Take advantage of the fact that for DUK_HTYPE_xxx numbers the lowest bit * is only set for DUK_HTYPE_OBJECT (= 1). */ #if 0 #define DUK_HEAPHDR_IS_OBJECT(h) (DUK_HEAPHDR_GET_TYPE((h)) == DUK_HTYPE_OBJECT) #endif #define DUK_HEAPHDR_IS_OBJECT(h) ((h)->h_flags & 0x01UL) #define DUK_HEAPHDR_IS_STRING(h) (DUK_HEAPHDR_GET_TYPE((h)) == DUK_HTYPE_STRING) #define DUK_HEAPHDR_IS_BUFFER(h) (DUK_HEAPHDR_GET_TYPE((h)) == DUK_HTYPE_BUFFER) /* * Assert helpers */ /* Check that prev/next links are consistent: if e.g. h->prev is != NULL, * h->prev->next should point back to h. */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_heaphdr_assert_valid_subclassed(duk_heaphdr *h); DUK_INTERNAL_DECL void duk_heaphdr_assert_links(duk_heap *heap, duk_heaphdr *h); DUK_INTERNAL_DECL void duk_heaphdr_assert_valid(duk_heaphdr *h); #define DUK_HEAPHDR_ASSERT_LINKS(heap,h) do { duk_heaphdr_assert_links((heap), (h)); } while (0) #define DUK_HEAPHDR_ASSERT_VALID(h) do { duk_heaphdr_assert_valid((h)); } while (0) #else #define DUK_HEAPHDR_ASSERT_LINKS(heap,h) do {} while (0) #define DUK_HEAPHDR_ASSERT_VALID(h) do {} while (0) #endif #endif /* DUK_HEAPHDR_H_INCLUDED */ /* #include duk_refcount.h */ /* * Reference counting helper macros. The macros take a thread argument * and must thus always be executed in a specific thread context. The * thread argument is not really needed anymore: DECREF can operate with * a heap pointer only, and INCREF needs neither. */ #if !defined(DUK_REFCOUNT_H_INCLUDED) #define DUK_REFCOUNT_H_INCLUDED #if defined(DUK_USE_REFERENCE_COUNTING) #if defined(DUK_USE_ROM_OBJECTS) /* With ROM objects "needs refcount update" is true when the value is * heap allocated and is not a ROM object. */ /* XXX: double evaluation for 'tv' argument. */ #define DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv) \ (DUK_TVAL_IS_HEAP_ALLOCATED((tv)) && !DUK_HEAPHDR_HAS_READONLY(DUK_TVAL_GET_HEAPHDR((tv)))) #define DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE(h) (!DUK_HEAPHDR_HAS_READONLY((h))) #else /* DUK_USE_ROM_OBJECTS */ /* Without ROM objects "needs refcount update" == is heap allocated. */ #define DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv) DUK_TVAL_IS_HEAP_ALLOCATED((tv)) #define DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE(h) 1 #endif /* DUK_USE_ROM_OBJECTS */ /* Fast variants, inline refcount operations except for refzero handling. * Can be used explicitly when speed is always more important than size. * For a good compiler and a single file build, these are basically the * same as a forced inline. */ #define DUK_TVAL_INCREF_FAST(thr,tv) do { \ duk_tval *duk__tv = (tv); \ DUK_ASSERT(duk__tv != NULL); \ if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(duk__tv)) { \ duk_heaphdr *duk__h = DUK_TVAL_GET_HEAPHDR(duk__tv); \ DUK_ASSERT(duk__h != NULL); \ DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(duk__h)); \ DUK_HEAPHDR_PREINC_REFCOUNT(duk__h); \ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(duk__h) != 0); /* No wrapping. */ \ } \ } while (0) #define DUK_TVAL_DECREF_FAST(thr,tv) do { \ duk_tval *duk__tv = (tv); \ DUK_ASSERT(duk__tv != NULL); \ if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(duk__tv)) { \ duk_heaphdr *duk__h = DUK_TVAL_GET_HEAPHDR(duk__tv); \ DUK_ASSERT(duk__h != NULL); \ DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(duk__h)); \ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(duk__h) > 0); \ if (DUK_HEAPHDR_PREDEC_REFCOUNT(duk__h) == 0) { \ duk_heaphdr_refzero((thr), duk__h); \ } \ } \ } while (0) #define DUK_TVAL_DECREF_NORZ_FAST(thr,tv) do { \ duk_tval *duk__tv = (tv); \ DUK_ASSERT(duk__tv != NULL); \ if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(duk__tv)) { \ duk_heaphdr *duk__h = DUK_TVAL_GET_HEAPHDR(duk__tv); \ DUK_ASSERT(duk__h != NULL); \ DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(duk__h)); \ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(duk__h) > 0); \ if (DUK_HEAPHDR_PREDEC_REFCOUNT(duk__h) == 0) { \ duk_heaphdr_refzero_norz((thr), duk__h); \ } \ } \ } while (0) #define DUK_HEAPHDR_INCREF_FAST(thr,h) do { \ duk_heaphdr *duk__h = (duk_heaphdr *) (h); \ DUK_ASSERT(duk__h != NULL); \ DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(duk__h)); \ if (DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE(duk__h)) { \ DUK_HEAPHDR_PREINC_REFCOUNT(duk__h); \ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(duk__h) != 0); /* No wrapping. */ \ } \ } while (0) #define DUK_HEAPHDR_DECREF_FAST_RAW(thr,h,rzcall,rzcast) do { \ duk_heaphdr *duk__h = (duk_heaphdr *) (h); \ DUK_ASSERT(duk__h != NULL); \ DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(duk__h)); \ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(duk__h) > 0); \ if (DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE(duk__h)) { \ if (DUK_HEAPHDR_PREDEC_REFCOUNT(duk__h) == 0) { \ (rzcall)((thr), (rzcast) duk__h); \ } \ } \ } while (0) #define DUK_HEAPHDR_DECREF_FAST(thr,h) \ DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_heaphdr_refzero,duk_heaphdr *) #define DUK_HEAPHDR_DECREF_NORZ_FAST(thr,h) \ DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_heaphdr_refzero_norz,duk_heaphdr *) /* Slow variants, call to a helper to reduce code size. * Can be used explicitly when size is always more important than speed. */ #define DUK_TVAL_INCREF_SLOW(thr,tv) do { duk_tval_incref((tv)); } while (0) #define DUK_TVAL_DECREF_SLOW(thr,tv) do { duk_tval_decref((thr), (tv)); } while (0) #define DUK_TVAL_DECREF_NORZ_SLOW(thr,tv) do { duk_tval_decref_norz((thr), (tv)); } while (0) #define DUK_HEAPHDR_INCREF_SLOW(thr,h) do { duk_heaphdr_incref((duk_heaphdr *) (h)); } while (0) #define DUK_HEAPHDR_DECREF_SLOW(thr,h) do { duk_heaphdr_decref((thr), (duk_heaphdr *) (h)); } while (0) #define DUK_HEAPHDR_DECREF_NORZ_SLOW(thr,h) do { duk_heaphdr_decref_norz((thr), (duk_heaphdr *) (h)); } while (0) #define DUK_HSTRING_INCREF_SLOW(thr,h) do { duk_heaphdr_incref((duk_heaphdr *) (h)); } while (0) #define DUK_HSTRING_DECREF_SLOW(thr,h) do { duk_heaphdr_decref((thr), (duk_heaphdr *) (h)); } while (0) #define DUK_HSTRING_DECREF_NORZ_SLOW(thr,h) do { duk_heaphdr_decref_norz((thr), (duk_heaphdr *) (h)); } while (0) #define DUK_HBUFFER_INCREF_SLOW(thr,h) do { duk_heaphdr_incref((duk_heaphdr *) (h)); } while (0) #define DUK_HBUFFER_DECREF_SLOW(thr,h) do { duk_heaphdr_decref((thr), (duk_heaphdr *) (h)); } while (0) #define DUK_HBUFFER_DECREF_NORZ_SLOW(thr,h) do { duk_heaphdr_decref_norz((thr), (duk_heaphdr *) (h)); } while (0) #define DUK_HOBJECT_INCREF_SLOW(thr,h) do { duk_heaphdr_incref((duk_heaphdr *) (h)); } while (0) #define DUK_HOBJECT_DECREF_SLOW(thr,h) do { duk_heaphdr_decref((thr), (duk_heaphdr *) (h)); } while (0) #define DUK_HOBJECT_DECREF_NORZ_SLOW(thr,h) do { duk_heaphdr_decref_norz((thr), (duk_heaphdr *) (h)); } while (0) /* Default variants. Selection depends on speed/size preference. * Concretely: with gcc 4.8.1 -Os x64 the difference in final binary * is about +1kB for _FAST variants. */ #if defined(DUK_USE_FAST_REFCOUNT_DEFAULT) /* XXX: It would be nice to specialize for specific duk_hobject subtypes * but current refzero queue handling prevents that. */ #define DUK_TVAL_INCREF(thr,tv) DUK_TVAL_INCREF_FAST((thr),(tv)) #define DUK_TVAL_DECREF(thr,tv) DUK_TVAL_DECREF_FAST((thr),(tv)) #define DUK_TVAL_DECREF_NORZ(thr,tv) DUK_TVAL_DECREF_NORZ_FAST((thr),(tv)) #define DUK_HEAPHDR_INCREF(thr,h) DUK_HEAPHDR_INCREF_FAST((thr),(h)) #define DUK_HEAPHDR_DECREF(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_heaphdr_refzero,duk_heaphdr *) #define DUK_HEAPHDR_DECREF_NORZ(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_heaphdr_refzero_norz,duk_heaphdr *) #define DUK_HSTRING_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) (h)) #define DUK_HSTRING_DECREF(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hstring_refzero,duk_hstring *) #define DUK_HSTRING_DECREF_NORZ(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hstring_refzero,duk_hstring *) /* no 'norz' variant */ #define DUK_HOBJECT_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) (h)) #define DUK_HOBJECT_DECREF(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero,duk_hobject *) #define DUK_HOBJECT_DECREF_NORZ(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero_norz,duk_hobject *) #define DUK_HBUFFER_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) (h)) #define DUK_HBUFFER_DECREF(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hbuffer_refzero,duk_hbuffer *) #define DUK_HBUFFER_DECREF_NORZ(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hbuffer_refzero,duk_hbuffer *) /* no 'norz' variant */ #define DUK_HCOMPFUNC_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj) #define DUK_HCOMPFUNC_DECREF(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero,duk_hobject *) #define DUK_HCOMPFUNC_DECREF_NORZ(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero_norz,duk_hobject *) #define DUK_HNATFUNC_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj) #define DUK_HNATFUNC_DECREF(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero,duk_hobject *) #define DUK_HNATFUNC_DECREF_NORZ(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero_norz,duk_hobject *) #define DUK_HBUFOBJ_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj) #define DUK_HBUFOBJ_DECREF(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero,duk_hobject *) #define DUK_HBUFOBJ_DECREF_NORZ(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero_norz,duk_hobject *) #define DUK_HTHREAD_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj) #define DUK_HTHREAD_DECREF(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero,duk_hobject *) #define DUK_HTHREAD_DECREF_NORZ(thr,h) DUK_HEAPHDR_DECREF_FAST_RAW((thr),(h),duk_hobject_refzero_norz,duk_hobject *) #else #define DUK_TVAL_INCREF(thr,tv) DUK_TVAL_INCREF_SLOW((thr),(tv)) #define DUK_TVAL_DECREF(thr,tv) DUK_TVAL_DECREF_SLOW((thr),(tv)) #define DUK_TVAL_DECREF_NORZ(thr,tv) DUK_TVAL_DECREF_NORZ_SLOW((thr),(tv)) #define DUK_HEAPHDR_INCREF(thr,h) DUK_HEAPHDR_INCREF_SLOW((thr),(h)) #define DUK_HEAPHDR_DECREF(thr,h) DUK_HEAPHDR_DECREF_SLOW((thr),(h)) #define DUK_HEAPHDR_DECREF_NORZ(thr,h) DUK_HEAPHDR_DECREF_NORZ_SLOW((thr),(h)) #define DUK_HSTRING_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) (h)) #define DUK_HSTRING_DECREF(thr,h) DUK_HSTRING_DECREF_SLOW((thr),(h)) #define DUK_HSTRING_DECREF_NORZ(thr,h) DUK_HSTRING_DECREF_NORZ_SLOW((thr),(h)) #define DUK_HOBJECT_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) (h)) #define DUK_HOBJECT_DECREF(thr,h) DUK_HOBJECT_DECREF_SLOW((thr),(h)) #define DUK_HOBJECT_DECREF_NORZ(thr,h) DUK_HOBJECT_DECREF_NORZ_SLOW((thr),(h)) #define DUK_HBUFFER_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) (h)) #define DUK_HBUFFER_DECREF(thr,h) DUK_HBUFFER_DECREF_SLOW((thr),(h)) #define DUK_HBUFFER_DECREF_NORZ(thr,h) DUK_HBUFFER_DECREF_NORZ_SLOW((thr),(h)) #define DUK_HCOMPFUNC_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj) #define DUK_HCOMPFUNC_DECREF(thr,h) DUK_HOBJECT_DECREF_SLOW((thr),(duk_hobject *) &(h)->obj) #define DUK_HCOMPFUNC_DECREF_NORZ(thr,h) DUK_HOBJECT_DECREF_NORZ_SLOW((thr),(duk_hobject *) &(h)->obj) #define DUK_HNATFUNC_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj) #define DUK_HNATFUNC_DECREF(thr,h) DUK_HOBJECT_DECREF_SLOW((thr),(duk_hobject *) &(h)->obj) #define DUK_HNATFUNC_DECREF_NORZ(thr,h) DUK_HOBJECT_DECREF_NORZ_SLOW((thr),(duk_hobject *) &(h)->obj) #define DUK_HBUFOBJ_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj) #define DUK_HBUFOBJ_DECREF(thr,h) DUK_HOBJECT_DECREF_SLOW((thr),(duk_hobject *) &(h)->obj) #define DUK_HBUFOB_DECREF_NORZ(thr,h) DUK_HOBJECT_DECREF_NORZ_SLOW((thr),(duk_hobject *) &(h)->obj) #define DUK_HTHREAD_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj) #define DUK_HTHREAD_DECREF(thr,h) DUK_HOBJECT_DECREF_SLOW((thr),(duk_hobject *) &(h)->obj) #define DUK_HTHREAD_DECREF_NORZ(thr,h) DUK_HOBJECT_DECREF_NORZ_SLOW((thr),(duk_hobject *) &(h)->obj) #endif /* Convenience for some situations; the above macros don't allow NULLs * for performance reasons. Macros cover only actually needed cases. */ #define DUK_HEAPHDR_INCREF_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HEAPHDR_INCREF((thr), (duk_heaphdr *) (h)); \ } \ } while (0) #define DUK_HEAPHDR_DECREF_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HEAPHDR_DECREF((thr), (duk_heaphdr *) (h)); \ } \ } while (0) #define DUK_HEAPHDR_DECREF_NORZ_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HEAPHDR_DECREF_NORZ((thr), (duk_heaphdr *) (h)); \ } \ } while (0) #define DUK_HOBJECT_INCREF_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HOBJECT_INCREF((thr), (h)); \ } \ } while (0) #define DUK_HOBJECT_DECREF_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HOBJECT_DECREF((thr), (h)); \ } \ } while (0) #define DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HOBJECT_DECREF_NORZ((thr), (h)); \ } \ } while (0) #define DUK_HBUFFER_INCREF_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HBUFFER_INCREF((thr), (h)); \ } \ } while (0) #define DUK_HBUFFER_DECREF_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HBUFFER_DECREF((thr), (h)); \ } \ } while (0) #define DUK_HBUFFER_DECREF_NORZ_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HBUFFER_DECREF_NORZ((thr), (h)); \ } \ } while (0) #define DUK_HTHREAD_INCREF_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HTHREAD_INCREF((thr), (h)); \ } \ } while (0) #define DUK_HTHREAD_DECREF_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HTHREAD_DECREF((thr), (h)); \ } \ } while (0) #define DUK_HTHREAD_DECREF_NORZ_ALLOWNULL(thr,h) do { \ if ((h) != NULL) { \ DUK_HTHREAD_DECREF_NORZ((thr), (h)); \ } \ } while (0) /* Called after one or more DECREF NORZ calls to handle pending side effects. * At present DECREF NORZ does freeing inline but doesn't execute finalizers, * so these macros check for pending finalizers and execute them. The FAST * variant is performance critical. */ #if defined(DUK_USE_FINALIZER_SUPPORT) #define DUK_REFZERO_CHECK_FAST(thr) do { \ duk_refzero_check_fast((thr)); \ } while (0) #define DUK_REFZERO_CHECK_SLOW(thr) do { \ duk_refzero_check_slow((thr)); \ } while (0) #else /* DUK_USE_FINALIZER_SUPPORT */ #define DUK_REFZERO_CHECK_FAST(thr) do { } while (0) #define DUK_REFZERO_CHECK_SLOW(thr) do { } while (0) #endif /* DUK_USE_FINALIZER_SUPPORT */ /* * Macros to set a duk_tval and update refcount of the target (decref the * old value and incref the new value if necessary). This is both performance * and footprint critical; any changes made should be measured for size/speed. */ #define DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0(thr,tvptr_dst) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_UNDEFINED(tv__dst); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ_ALT0(thr,tvptr_dst) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_UNDEFINED(tv__dst); \ DUK_TVAL_DECREF_NORZ((thr), &tv__tmp); \ } while (0) #define DUK_TVAL_SET_UNUSED_UPDREF_ALT0(thr,tvptr_dst) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_UNUSED(tv__dst); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_NULL_UPDREF_ALT0(thr,tvptr_dst) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_NULL(tv__dst); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_BOOLEAN_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_BOOLEAN(tv__dst, (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_NUMBER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_NUMBER(tv__dst, (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_NUMBER_CHKFAST_FAST(tv__dst, (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_DOUBLE_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_DOUBLE(tv__dst, (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_NAN_UPDREF_ALT0(thr,tvptr_dst) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_NAN(tv__dst); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #if defined(DUK_USE_FASTINT) #define DUK_TVAL_SET_I48_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_I48(tv__dst, (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_I32_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_I32(tv__dst, (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_U32_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_U32(tv__dst, (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #else #define DUK_TVAL_SET_DOUBLE_CAST_UPDREF(thr,tvptr_dst,newval) \ DUK_TVAL_SET_DOUBLE_UPDREF((thr), (tvptr_dst), (duk_double_t) (newval)) #endif /* DUK_USE_FASTINT */ #define DUK_TVAL_SET_LIGHTFUNC_UPDREF_ALT0(thr,tvptr_dst,lf_v,lf_fp,lf_flags) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_LIGHTFUNC(tv__dst, (lf_v), (lf_fp), (lf_flags)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_STRING_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_STRING(tv__dst, (newval)); \ DUK_HSTRING_INCREF((thr), (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_OBJECT_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_OBJECT(tv__dst, (newval)); \ DUK_HOBJECT_INCREF((thr), (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_BUFFER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_BUFFER(tv__dst, (newval)); \ DUK_HBUFFER_INCREF((thr), (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) #define DUK_TVAL_SET_POINTER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_POINTER(tv__dst, (newval)); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) /* DUK_TVAL_SET_TVAL_UPDREF() is used a lot in executor, property lookups, * etc, so it's very important for performance. Measure when changing. * * NOTE: the source and destination duk_tval pointers may be the same, and * the macros MUST deal with that correctly. */ /* Original idiom used, minimal code size. */ #define DUK_TVAL_SET_TVAL_UPDREF_ALT0(thr,tvptr_dst,tvptr_src) do { \ duk_tval *tv__dst, *tv__src; duk_tval tv__tmp; \ tv__dst = (tvptr_dst); tv__src = (tvptr_src); \ DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \ DUK_TVAL_SET_TVAL(tv__dst, tv__src); \ DUK_TVAL_INCREF((thr), tv__src); \ DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \ } while (0) /* Faster alternative: avoid making a temporary copy of tvptr_dst and use * fast incref/decref macros. */ #define DUK_TVAL_SET_TVAL_UPDREF_ALT1(thr,tvptr_dst,tvptr_src) do { \ duk_tval *tv__dst, *tv__src; duk_heaphdr *h__obj; \ tv__dst = (tvptr_dst); tv__src = (tvptr_src); \ DUK_TVAL_INCREF_FAST((thr), tv__src); \ if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv__dst)) { \ h__obj = DUK_TVAL_GET_HEAPHDR(tv__dst); \ DUK_ASSERT(h__obj != NULL); \ DUK_TVAL_SET_TVAL(tv__dst, tv__src); \ DUK_HEAPHDR_DECREF_FAST((thr), h__obj); /* side effects */ \ } else { \ DUK_TVAL_SET_TVAL(tv__dst, tv__src); \ } \ } while (0) /* XXX: no optimized variants yet */ #define DUK_TVAL_SET_UNDEFINED_UPDREF DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0 #define DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ_ALT0 #define DUK_TVAL_SET_UNUSED_UPDREF DUK_TVAL_SET_UNUSED_UPDREF_ALT0 #define DUK_TVAL_SET_NULL_UPDREF DUK_TVAL_SET_NULL_UPDREF_ALT0 #define DUK_TVAL_SET_BOOLEAN_UPDREF DUK_TVAL_SET_BOOLEAN_UPDREF_ALT0 #define DUK_TVAL_SET_NUMBER_UPDREF DUK_TVAL_SET_NUMBER_UPDREF_ALT0 #define DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF_ALT0 #define DUK_TVAL_SET_DOUBLE_UPDREF DUK_TVAL_SET_DOUBLE_UPDREF_ALT0 #define DUK_TVAL_SET_NAN_UPDREF DUK_TVAL_SET_NAN_UPDREF_ALT0 #if defined(DUK_USE_FASTINT) #define DUK_TVAL_SET_I48_UPDREF DUK_TVAL_SET_I48_UPDREF_ALT0 #define DUK_TVAL_SET_I32_UPDREF DUK_TVAL_SET_I32_UPDREF_ALT0 #define DUK_TVAL_SET_U32_UPDREF DUK_TVAL_SET_U32_UPDREF_ALT0 #else #define DUK_TVAL_SET_I48_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF /* XXX: fast int-to-double */ #define DUK_TVAL_SET_I32_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF #define DUK_TVAL_SET_U32_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF #endif /* DUK_USE_FASTINT */ #define DUK_TVAL_SET_FASTINT_UPDREF DUK_TVAL_SET_I48_UPDREF /* convenience */ #define DUK_TVAL_SET_LIGHTFUNC_UPDREF DUK_TVAL_SET_LIGHTFUNC_UPDREF_ALT0 #define DUK_TVAL_SET_STRING_UPDREF DUK_TVAL_SET_STRING_UPDREF_ALT0 #define DUK_TVAL_SET_OBJECT_UPDREF DUK_TVAL_SET_OBJECT_UPDREF_ALT0 #define DUK_TVAL_SET_BUFFER_UPDREF DUK_TVAL_SET_BUFFER_UPDREF_ALT0 #define DUK_TVAL_SET_POINTER_UPDREF DUK_TVAL_SET_POINTER_UPDREF_ALT0 #if defined(DUK_USE_FAST_REFCOUNT_DEFAULT) /* Optimized for speed. */ #define DUK_TVAL_SET_TVAL_UPDREF DUK_TVAL_SET_TVAL_UPDREF_ALT1 #define DUK_TVAL_SET_TVAL_UPDREF_FAST DUK_TVAL_SET_TVAL_UPDREF_ALT1 #define DUK_TVAL_SET_TVAL_UPDREF_SLOW DUK_TVAL_SET_TVAL_UPDREF_ALT0 #else /* Optimized for size. */ #define DUK_TVAL_SET_TVAL_UPDREF DUK_TVAL_SET_TVAL_UPDREF_ALT0 #define DUK_TVAL_SET_TVAL_UPDREF_FAST DUK_TVAL_SET_TVAL_UPDREF_ALT0 #define DUK_TVAL_SET_TVAL_UPDREF_SLOW DUK_TVAL_SET_TVAL_UPDREF_ALT0 #endif #else /* DUK_USE_REFERENCE_COUNTING */ #define DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv) 0 #define DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE(h) 0 #define DUK_TVAL_INCREF_FAST(thr,v) do {} while (0) /* nop */ #define DUK_TVAL_DECREF_FAST(thr,v) do {} while (0) /* nop */ #define DUK_TVAL_DECREF_NORZ_FAST(thr,v) do {} while (0) /* nop */ #define DUK_TVAL_INCREF_SLOW(thr,v) do {} while (0) /* nop */ #define DUK_TVAL_DECREF_SLOW(thr,v) do {} while (0) /* nop */ #define DUK_TVAL_DECREF_NORZ_SLOW(thr,v) do {} while (0) /* nop */ #define DUK_TVAL_INCREF(thr,v) do {} while (0) /* nop */ #define DUK_TVAL_DECREF(thr,v) do {} while (0) /* nop */ #define DUK_TVAL_DECREF_NORZ(thr,v) do {} while (0) /* nop */ #define DUK_HEAPHDR_INCREF_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HEAPHDR_DECREF_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HEAPHDR_DECREF_NORZ_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HEAPHDR_INCREF_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HEAPHDR_DECREF_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HEAPHDR_DECREF_NORZ_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HEAPHDR_INCREF(thr,h) do {} while (0) /* nop */ #define DUK_HEAPHDR_DECREF(thr,h) do {} while (0) /* nop */ #define DUK_HEAPHDR_DECREF_NORZ(thr,h) do {} while (0) /* nop */ #define DUK_HSTRING_INCREF_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HSTRING_DECREF_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HSTRING_DECREF_NORZ_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HSTRING_INCREF_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HSTRING_DECREF_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HSTRING_DECREF_NORZ_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HSTRING_INCREF(thr,h) do {} while (0) /* nop */ #define DUK_HSTRING_DECREF(thr,h) do {} while (0) /* nop */ #define DUK_HSTRING_DECREF_NORZ(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_INCREF_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_DECREF_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_DECREF_NORZ_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_INCREF_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_DECREF_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_DECREF_NORZ_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_INCREF(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_DECREF(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_DECREF_NORZ(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_INCREF_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_DECREF_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_DECREF_NORZ_FAST(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_INCREF_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_DECREF_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_DECREF_NORZ_SLOW(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_INCREF(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_DECREF(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_DECREF_NORZ(thr,h) do {} while (0) /* nop */ #define DUK_HCOMPFUNC_INCREF(thr,h) do {} while (0) /* nop */ #define DUK_HCOMPFUNC_DECREF(thr,h) do {} while (0) /* nop */ #define DUK_HCOMPFUNC_DECREF_NORZ(thr,h) do {} while (0) /* nop */ #define DUK_HNATFUNC_INCREF(thr,h) do {} while (0) /* nop */ #define DUK_HNATFUNC_DECREF(thr,h) do {} while (0) /* nop */ #define DUK_HNATFUNC_DECREF_NORZ(thr,h) do {} while (0) /* nop */ #define DUK_HBUFOBJ_INCREF(thr,h) do {} while (0) /* nop */ #define DUK_HBUFOBJ_DECREF(thr,h) do {} while (0) /* nop */ #define DUK_HBUFOBJ_DECREF_NORZ(thr,h) do {} while (0) /* nop */ #define DUK_HTHREAD_INCREF(thr,h) do {} while (0) /* nop */ #define DUK_HTHREAD_DECREF(thr,h) do {} while (0) /* nop */ #define DUK_HTHREAD_DECREF_NORZ(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_INCREF_ALLOWNULL(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_DECREF_ALLOWNULL(thr,h) do {} while (0) /* nop */ #define DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_INCREF_ALLOWNULL(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_DECREF_ALLOWNULL(thr,h) do {} while (0) /* nop */ #define DUK_HBUFFER_DECREF_NORZ_ALLOWNULL(thr,h) do {} while (0) /* nop */ #define DUK_REFZERO_CHECK_FAST(thr) do {} while (0) /* nop */ #define DUK_REFZERO_CHECK_SLOW(thr) do {} while (0) /* nop */ #define DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0(thr,tvptr_dst) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_UNDEFINED(tv__dst); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_UNUSED_UPDREF_ALT0(thr,tvptr_dst) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_UNUSED(tv__dst); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_NULL_UPDREF_ALT0(thr,tvptr_dst) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_NULL(tv__dst); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_BOOLEAN_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_BOOLEAN(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_NUMBER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_NUMBER(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_NUMBER_CHKFAST_FAST(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_DOUBLE_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_DOUBLE(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_NAN_UPDREF_ALT0(thr,tvptr_dst) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_NAN(tv__dst); \ DUK_UNREF((thr)); \ } while (0) #if defined(DUK_USE_FASTINT) #define DUK_TVAL_SET_I48_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_I48(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_I32_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_I32(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_U32_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_U32(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #else #define DUK_TVAL_SET_DOUBLE_CAST_UPDREF(thr,tvptr_dst,newval) \ DUK_TVAL_SET_DOUBLE_UPDREF((thr), (tvptr_dst), (duk_double_t) (newval)) #endif /* DUK_USE_FASTINT */ #define DUK_TVAL_SET_LIGHTFUNC_UPDREF_ALT0(thr,tvptr_dst,lf_v,lf_fp,lf_flags) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_LIGHTFUNC(tv__dst, (lf_v), (lf_fp), (lf_flags)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_STRING_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_STRING(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_OBJECT_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_OBJECT(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_BUFFER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_BUFFER(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_POINTER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \ duk_tval *tv__dst; tv__dst = (tvptr_dst); \ DUK_TVAL_SET_POINTER(tv__dst, (newval)); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_TVAL_UPDREF_ALT0(thr,tvptr_dst,tvptr_src) do { \ duk_tval *tv__dst, *tv__src; \ tv__dst = (tvptr_dst); tv__src = (tvptr_src); \ DUK_TVAL_SET_TVAL(tv__dst, tv__src); \ DUK_UNREF((thr)); \ } while (0) #define DUK_TVAL_SET_UNDEFINED_UPDREF DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0 #define DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0 #define DUK_TVAL_SET_UNUSED_UPDREF DUK_TVAL_SET_UNUSED_UPDREF_ALT0 #define DUK_TVAL_SET_NULL_UPDREF DUK_TVAL_SET_NULL_UPDREF_ALT0 #define DUK_TVAL_SET_BOOLEAN_UPDREF DUK_TVAL_SET_BOOLEAN_UPDREF_ALT0 #define DUK_TVAL_SET_NUMBER_UPDREF DUK_TVAL_SET_NUMBER_UPDREF_ALT0 #define DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF_ALT0 #define DUK_TVAL_SET_DOUBLE_UPDREF DUK_TVAL_SET_DOUBLE_UPDREF_ALT0 #define DUK_TVAL_SET_NAN_UPDREF DUK_TVAL_SET_NAN_UPDREF_ALT0 #if defined(DUK_USE_FASTINT) #define DUK_TVAL_SET_I48_UPDREF DUK_TVAL_SET_I48_UPDREF_ALT0 #define DUK_TVAL_SET_I32_UPDREF DUK_TVAL_SET_I32_UPDREF_ALT0 #define DUK_TVAL_SET_U32_UPDREF DUK_TVAL_SET_U32_UPDREF_ALT0 #else #define DUK_TVAL_SET_I48_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF /* XXX: fast-int-to-double */ #define DUK_TVAL_SET_I32_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF #define DUK_TVAL_SET_U32_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF #endif /* DUK_USE_FASTINT */ #define DUK_TVAL_SET_FASTINT_UPDREF DUK_TVAL_SET_I48_UPDREF /* convenience */ #define DUK_TVAL_SET_LIGHTFUNC_UPDREF DUK_TVAL_SET_LIGHTFUNC_UPDREF_ALT0 #define DUK_TVAL_SET_STRING_UPDREF DUK_TVAL_SET_STRING_UPDREF_ALT0 #define DUK_TVAL_SET_OBJECT_UPDREF DUK_TVAL_SET_OBJECT_UPDREF_ALT0 #define DUK_TVAL_SET_BUFFER_UPDREF DUK_TVAL_SET_BUFFER_UPDREF_ALT0 #define DUK_TVAL_SET_POINTER_UPDREF DUK_TVAL_SET_POINTER_UPDREF_ALT0 #define DUK_TVAL_SET_TVAL_UPDREF DUK_TVAL_SET_TVAL_UPDREF_ALT0 #define DUK_TVAL_SET_TVAL_UPDREF_FAST DUK_TVAL_SET_TVAL_UPDREF_ALT0 #define DUK_TVAL_SET_TVAL_UPDREF_SLOW DUK_TVAL_SET_TVAL_UPDREF_ALT0 #endif /* DUK_USE_REFERENCE_COUNTING */ /* * Some convenience macros that don't have optimized implementations now. */ #define DUK_TVAL_SET_TVAL_UPDREF_NORZ(thr,tv_dst,tv_src) do { \ duk_hthread *duk__thr = (thr); \ duk_tval *duk__dst = (tv_dst); \ duk_tval *duk__src = (tv_src); \ DUK_UNREF(duk__thr); \ DUK_TVAL_DECREF_NORZ(thr, duk__dst); \ DUK_TVAL_SET_TVAL(duk__dst, duk__src); \ DUK_TVAL_INCREF(thr, duk__dst); \ } while (0) #define DUK_TVAL_SET_U32_UPDREF_NORZ(thr,tv_dst,val) do { \ duk_hthread *duk__thr = (thr); \ duk_tval *duk__dst = (tv_dst); \ duk_uint32_t duk__val = (duk_uint32_t) (val); \ DUK_UNREF(duk__thr); \ DUK_TVAL_DECREF_NORZ(thr, duk__dst); \ DUK_TVAL_SET_U32(duk__dst, duk__val); \ } while (0) /* * Prototypes */ #if defined(DUK_USE_REFERENCE_COUNTING) #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_INTERNAL_DECL void duk_refzero_check_slow(duk_hthread *thr); DUK_INTERNAL_DECL DUK_INLINE void duk_refzero_check_fast(duk_hthread *thr); #endif DUK_INTERNAL_DECL void duk_heaphdr_refcount_finalize_norz(duk_heap *heap, duk_heaphdr *hdr); DUK_INTERNAL_DECL void duk_hobject_refcount_finalize_norz(duk_heap *heap, duk_hobject *h); #if 0 /* Not needed: fast path handles inline; slow path uses duk_heaphdr_decref() which is needed anyway. */ DUK_INTERNAL_DECL void duk_hstring_decref(duk_hthread *thr, duk_hstring *h); DUK_INTERNAL_DECL void duk_hstring_decref_norz(duk_hthread *thr, duk_hstring *h); DUK_INTERNAL_DECL void duk_hbuffer_decref(duk_hthread *thr, duk_hbuffer *h); DUK_INTERNAL_DECL void duk_hbuffer_decref_norz(duk_hthread *thr, duk_hbuffer *h); DUK_INTERNAL_DECL void duk_hobject_decref(duk_hthread *thr, duk_hobject *h); DUK_INTERNAL_DECL void duk_hobject_decref_norz(duk_hthread *thr, duk_hobject *h); #endif DUK_INTERNAL_DECL void duk_heaphdr_refzero(duk_hthread *thr, duk_heaphdr *h); DUK_INTERNAL_DECL void duk_heaphdr_refzero_norz(duk_hthread *thr, duk_heaphdr *h); #if defined(DUK_USE_FAST_REFCOUNT_DEFAULT) DUK_INTERNAL_DECL void duk_hstring_refzero(duk_hthread *thr, duk_hstring *h); /* no 'norz' variant */ DUK_INTERNAL_DECL void duk_hbuffer_refzero(duk_hthread *thr, duk_hbuffer *h); /* no 'norz' variant */ DUK_INTERNAL_DECL void duk_hobject_refzero(duk_hthread *thr, duk_hobject *h); DUK_INTERNAL_DECL void duk_hobject_refzero_norz(duk_hthread *thr, duk_hobject *h); #else DUK_INTERNAL_DECL void duk_tval_incref(duk_tval *tv); DUK_INTERNAL_DECL void duk_tval_decref(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL void duk_tval_decref_norz(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL void duk_heaphdr_incref(duk_heaphdr *h); DUK_INTERNAL_DECL void duk_heaphdr_decref(duk_hthread *thr, duk_heaphdr *h); DUK_INTERNAL_DECL void duk_heaphdr_decref_norz(duk_hthread *thr, duk_heaphdr *h); #endif #else /* DUK_USE_REFERENCE_COUNTING */ /* no refcounting */ #endif /* DUK_USE_REFERENCE_COUNTING */ #endif /* DUK_REFCOUNT_H_INCLUDED */ /* #include duk_api_internal.h */ /* * Internal API calls which have (stack and other) semantics similar * to the public API. */ #if !defined(DUK_API_INTERNAL_H_INCLUDED) #define DUK_API_INTERNAL_H_INCLUDED /* duk_push_sprintf constants */ #define DUK_PUSH_SPRINTF_INITIAL_SIZE 256L #define DUK_PUSH_SPRINTF_SANITY_LIMIT (1L * 1024L * 1024L * 1024L) /* Flag ORed to err_code to indicate __FILE__ / __LINE__ is not * blamed as source of error for error fileName / lineNumber. */ #define DUK_ERRCODE_FLAG_NOBLAME_FILELINE (1L << 24) /* Current convention is to use duk_size_t for value stack sizes and global indices, * and duk_idx_t for local frame indices. */ DUK_INTERNAL_DECL DUK_INLINE void duk_valstack_grow_check_throw(duk_hthread *thr, duk_size_t min_bytes); DUK_INTERNAL_DECL DUK_INLINE duk_bool_t duk_valstack_grow_check_nothrow(duk_hthread *thr, duk_size_t min_bytes); DUK_INTERNAL_DECL void duk_valstack_shrink_check_nothrow(duk_hthread *thr, duk_bool_t snug); DUK_INTERNAL_DECL void duk_copy_tvals_incref(duk_hthread *thr, duk_tval *tv_dst, duk_tval *tv_src, duk_size_t count); DUK_INTERNAL_DECL duk_tval *duk_reserve_gap(duk_hthread *thr, duk_idx_t idx_base, duk_idx_t count); DUK_INTERNAL_DECL void duk_set_top_unsafe(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL void duk_set_top_and_wipe(duk_hthread *thr, duk_idx_t top, duk_idx_t idx_wipe_start); DUK_INTERNAL_DECL void duk_dup_0(duk_hthread *thr); DUK_INTERNAL_DECL void duk_dup_1(duk_hthread *thr); DUK_INTERNAL_DECL void duk_dup_2(duk_hthread *thr); /* duk_dup_m1() would be same as duk_dup_top() */ DUK_INTERNAL_DECL void duk_dup_m2(duk_hthread *thr); DUK_INTERNAL_DECL void duk_dup_m3(duk_hthread *thr); DUK_INTERNAL_DECL void duk_dup_m4(duk_hthread *thr); DUK_INTERNAL_DECL void duk_remove_unsafe(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL void duk_remove_m2(duk_hthread *thr); DUK_INTERNAL_DECL void duk_remove_n(duk_hthread *thr, duk_idx_t idx, duk_idx_t count); DUK_INTERNAL_DECL void duk_remove_n_unsafe(duk_hthread *thr, duk_idx_t idx, duk_idx_t count); DUK_INTERNAL_DECL duk_int_t duk_get_type_tval(duk_tval *tv); DUK_INTERNAL_DECL duk_uint_t duk_get_type_mask_tval(duk_tval *tv); #if defined(DUK_USE_VERBOSE_ERRORS) && defined(DUK_USE_PARANOID_ERRORS) DUK_INTERNAL_DECL const char *duk_get_type_name(duk_hthread *thr, duk_idx_t idx); #endif DUK_INTERNAL_DECL duk_small_uint_t duk_get_class_number(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_tval *duk_get_tval(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_tval *duk_get_tval_or_unused(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_tval *duk_require_tval(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL void duk_push_tval(duk_hthread *thr, duk_tval *tv); /* Push the current 'this' binding; throw TypeError if binding is not object * coercible (CheckObjectCoercible). */ DUK_INTERNAL_DECL void duk_push_this_check_object_coercible(duk_hthread *thr); /* duk_push_this() + CheckObjectCoercible() + duk_to_object() */ DUK_INTERNAL_DECL duk_hobject *duk_push_this_coercible_to_object(duk_hthread *thr); /* duk_push_this() + CheckObjectCoercible() + duk_to_string() */ DUK_INTERNAL_DECL duk_hstring *duk_push_this_coercible_to_string(duk_hthread *thr); DUK_INTERNAL_DECL duk_hstring *duk_push_uint_to_hstring(duk_hthread *thr, duk_uint_t i); /* Get a borrowed duk_tval pointer to the current 'this' binding. Caller must * make sure there's an active callstack entry. Note that the returned pointer * is unstable with regards to side effects. */ DUK_INTERNAL_DECL duk_tval *duk_get_borrowed_this_tval(duk_hthread *thr); /* XXX: add fastint support? */ #define duk_push_u64(thr,val) \ duk_push_number((thr), (duk_double_t) (val)) #define duk_push_i64(thr,val) \ duk_push_number((thr), (duk_double_t) (val)) /* duk_push_(u)int() is guaranteed to support at least (un)signed 32-bit range */ #define duk_push_u32(thr,val) \ duk_push_uint((thr), (duk_uint_t) (val)) #define duk_push_i32(thr,val) \ duk_push_int((thr), (duk_int_t) (val)) /* sometimes stack and array indices need to go on the stack */ #define duk_push_idx(thr,val) \ duk_push_int((thr), (duk_int_t) (val)) #define duk_push_uarridx(thr,val) \ duk_push_uint((thr), (duk_uint_t) (val)) #define duk_push_size_t(thr,val) \ duk_push_uint((thr), (duk_uint_t) (val)) /* XXX: assumed to fit for now */ DUK_INTERNAL_DECL duk_bool_t duk_is_string_notsymbol(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_bool_t duk_is_callable_tval(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL duk_bool_t duk_is_bare_object(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hstring *duk_get_hstring(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hstring *duk_get_hstring_notsymbol(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL const char *duk_get_string_notsymbol(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hobject *duk_get_hobject(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hbuffer *duk_get_hbuffer(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hthread *duk_get_hthread(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hcompfunc *duk_get_hcompfunc(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hnatfunc *duk_get_hnatfunc(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL void *duk_get_buffer_data_raw(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size, void *def_ptr, duk_size_t def_len, duk_bool_t throw_flag, duk_bool_t *out_isbuffer); DUK_INTERNAL_DECL duk_hobject *duk_get_hobject_with_class(duk_hthread *thr, duk_idx_t idx, duk_small_uint_t classnum); DUK_INTERNAL_DECL duk_hobject *duk_get_hobject_promote_mask(duk_hthread *thr, duk_idx_t idx, duk_uint_t type_mask); DUK_INTERNAL_DECL duk_hobject *duk_require_hobject_promote_mask(duk_hthread *thr, duk_idx_t idx, duk_uint_t type_mask); DUK_INTERNAL_DECL duk_hobject *duk_require_hobject_accept_mask(duk_hthread *thr, duk_idx_t idx, duk_uint_t type_mask); #define duk_require_hobject_promote_lfunc(thr,idx) \ duk_require_hobject_promote_mask((thr), (idx), DUK_TYPE_MASK_LIGHTFUNC) #define duk_get_hobject_promote_lfunc(thr,idx) \ duk_get_hobject_promote_mask((thr), (idx), DUK_TYPE_MASK_LIGHTFUNC) #if 0 /*unused*/ DUK_INTERNAL_DECL void *duk_get_voidptr(duk_hthread *thr, duk_idx_t idx); #endif DUK_INTERNAL_DECL duk_hstring *duk_known_hstring(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hobject *duk_known_hobject(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hbuffer *duk_known_hbuffer(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hcompfunc *duk_known_hcompfunc(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hnatfunc *duk_known_hnatfunc(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_double_t duk_to_number_tval(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL duk_hstring *duk_to_hstring(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hstring *duk_to_hstring_m1(duk_hthread *thr); DUK_INTERNAL_DECL duk_hstring *duk_to_hstring_acceptsymbol(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hobject *duk_to_hobject(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_double_t duk_to_number_m1(duk_hthread *thr); DUK_INTERNAL_DECL duk_double_t duk_to_number_m2(duk_hthread *thr); DUK_INTERNAL_DECL duk_bool_t duk_to_boolean_top_pop(duk_hthread *thr); #if defined(DUK_USE_DEBUGGER_SUPPORT) /* only needed by debugger for now */ DUK_INTERNAL_DECL duk_hstring *duk_safe_to_hstring(duk_hthread *thr, duk_idx_t idx); #endif DUK_INTERNAL_DECL void duk_push_class_string_tval(duk_hthread *thr, duk_tval *tv, duk_bool_t avoid_side_effects); DUK_INTERNAL_DECL duk_int_t duk_to_int_clamped_raw(duk_hthread *thr, duk_idx_t idx, duk_int_t minval, duk_int_t maxval, duk_bool_t *out_clamped); /* out_clamped=NULL, RangeError if outside range */ DUK_INTERNAL_DECL duk_int_t duk_to_int_clamped(duk_hthread *thr, duk_idx_t idx, duk_int_t minval, duk_int_t maxval); DUK_INTERNAL_DECL duk_int_t duk_to_int_check_range(duk_hthread *thr, duk_idx_t idx, duk_int_t minval, duk_int_t maxval); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL_DECL duk_uint8_t duk_to_uint8clamped(duk_hthread *thr, duk_idx_t idx); #endif DUK_INTERNAL_DECL duk_hstring *duk_to_property_key_hstring(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hstring *duk_require_hstring(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hstring *duk_require_hstring_notsymbol(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL const char *duk_require_lstring_notsymbol(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_len); DUK_INTERNAL_DECL const char *duk_require_string_notsymbol(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hobject *duk_require_hobject(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hbuffer *duk_require_hbuffer(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hthread *duk_require_hthread(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hcompfunc *duk_require_hcompfunc(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hnatfunc *duk_require_hnatfunc(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL duk_hobject *duk_require_hobject_with_class(duk_hthread *thr, duk_idx_t idx, duk_small_uint_t classnum); DUK_INTERNAL_DECL void duk_push_hstring(duk_hthread *thr, duk_hstring *h); DUK_INTERNAL_DECL void duk_push_hstring_stridx(duk_hthread *thr, duk_small_uint_t stridx); DUK_INTERNAL_DECL void duk_push_hstring_empty(duk_hthread *thr); DUK_INTERNAL_DECL void duk_push_hobject(duk_hthread *thr, duk_hobject *h); DUK_INTERNAL_DECL void duk_push_hbuffer(duk_hthread *thr, duk_hbuffer *h); #define duk_push_hthread(thr,h) \ duk_push_hobject((thr), (duk_hobject *) (h)) #define duk_push_hnatfunc(thr,h) \ duk_push_hobject((thr), (duk_hobject *) (h)) DUK_INTERNAL_DECL void duk_push_hobject_bidx(duk_hthread *thr, duk_small_int_t builtin_idx); DUK_INTERNAL_DECL duk_hobject *duk_push_object_helper(duk_hthread *thr, duk_uint_t hobject_flags_and_class, duk_small_int_t prototype_bidx); DUK_INTERNAL_DECL duk_hobject *duk_push_object_helper_proto(duk_hthread *thr, duk_uint_t hobject_flags_and_class, duk_hobject *proto); DUK_INTERNAL_DECL duk_hcompfunc *duk_push_hcompfunc(duk_hthread *thr); DUK_INTERNAL_DECL duk_hboundfunc *duk_push_hboundfunc(duk_hthread *thr); DUK_INTERNAL_DECL void duk_push_c_function_builtin(duk_hthread *thr, duk_c_function func, duk_int_t nargs); DUK_INTERNAL_DECL void duk_push_c_function_builtin_noconstruct(duk_hthread *thr, duk_c_function func, duk_int_t nargs); /* XXX: duk_push_harray() and duk_push_hcompfunc() are inconsistent with * duk_push_hobject() etc which don't create a new value. */ DUK_INTERNAL_DECL duk_harray *duk_push_harray(duk_hthread *thr); DUK_INTERNAL_DECL duk_harray *duk_push_harray_with_size(duk_hthread *thr, duk_uint32_t size); DUK_INTERNAL_DECL duk_tval *duk_push_harray_with_size_outptr(duk_hthread *thr, duk_uint32_t size); DUK_INTERNAL_DECL void duk_push_string_funcptr(duk_hthread *thr, duk_uint8_t *ptr, duk_size_t sz); DUK_INTERNAL_DECL void duk_push_lightfunc_name_raw(duk_hthread *thr, duk_c_function func, duk_small_uint_t lf_flags); DUK_INTERNAL_DECL void duk_push_lightfunc_name(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL void duk_push_lightfunc_tostring(duk_hthread *thr, duk_tval *tv); #if 0 /* not used yet */ DUK_INTERNAL_DECL void duk_push_hnatfunc_name(duk_hthread *thr, duk_hnatfunc *h); #endif #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL_DECL duk_hbufobj *duk_push_bufobj_raw(duk_hthread *thr, duk_uint_t hobject_flags_and_class, duk_small_int_t prototype_bidx); #endif DUK_INTERNAL_DECL void *duk_push_fixed_buffer_nozero(duk_hthread *thr, duk_size_t len); DUK_INTERNAL_DECL void *duk_push_fixed_buffer_zero(duk_hthread *thr, duk_size_t len); DUK_INTERNAL_DECL const char *duk_push_string_readable(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL const char *duk_push_string_tval_readable(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL const char *duk_push_string_tval_readable_error(duk_hthread *thr, duk_tval *tv); /* The duk_xxx_prop_stridx_short() variants expect their arguments to be short * enough to be packed into a single 32-bit integer argument. Argument limits * vary per call; typically 16 bits are assigned to the signed value stack index * and the stridx. In practice these work well for footprint with constant * arguments and such call sites are also easiest to verify to be correct. */ DUK_INTERNAL_DECL duk_bool_t duk_get_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx); /* [] -> [val] */ DUK_INTERNAL_DECL duk_bool_t duk_get_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args); #define duk_get_prop_stridx_short(thr,obj_idx,stridx) \ (DUK_ASSERT_EXPR((duk_int_t) (obj_idx) >= -0x8000L && (duk_int_t) (obj_idx) <= 0x7fffL), \ DUK_ASSERT_EXPR((duk_int_t) (stridx) >= 0 && (duk_int_t) (stridx) <= 0xffffL), \ duk_get_prop_stridx_short_raw((thr), (((duk_uint_t) (obj_idx)) << 16) + ((duk_uint_t) (stridx)))) DUK_INTERNAL_DECL duk_bool_t duk_get_prop_stridx_boolean(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx, duk_bool_t *out_has_prop); /* [] -> [] */ DUK_INTERNAL_DECL duk_bool_t duk_xget_owndataprop(duk_hthread *thr, duk_idx_t obj_idx); DUK_INTERNAL_DECL duk_bool_t duk_xget_owndataprop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx); DUK_INTERNAL_DECL duk_bool_t duk_xget_owndataprop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args); #define duk_xget_owndataprop_stridx_short(thr,obj_idx,stridx) \ (DUK_ASSERT_EXPR((duk_int_t) (obj_idx) >= -0x8000L && (duk_int_t) (obj_idx) <= 0x7fffL), \ DUK_ASSERT_EXPR((duk_int_t) (stridx) >= 0 && (duk_int_t) (stridx) <= 0xffffL), \ duk_xget_owndataprop_stridx_short_raw((thr), (((duk_uint_t) (obj_idx)) << 16) + ((duk_uint_t) (stridx)))) DUK_INTERNAL_DECL duk_bool_t duk_put_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx); /* [val] -> [] */ DUK_INTERNAL_DECL duk_bool_t duk_put_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args); #define duk_put_prop_stridx_short(thr,obj_idx,stridx) \ (DUK_ASSERT_EXPR((duk_int_t) (obj_idx) >= -0x8000L && (duk_int_t) (obj_idx) <= 0x7fffL), \ DUK_ASSERT_EXPR((duk_int_t) (stridx) >= 0 && (duk_int_t) (stridx) <= 0xffffL), \ duk_put_prop_stridx_short_raw((thr), (((duk_uint_t) (obj_idx)) << 16) + ((duk_uint_t) (stridx)))) DUK_INTERNAL_DECL duk_bool_t duk_del_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx); /* [] -> [] */ #if 0 /* Too few call sites to be useful. */ DUK_INTERNAL_DECL duk_bool_t duk_del_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args); #define duk_del_prop_stridx_short(thr,obj_idx,stridx) \ (DUK_ASSERT_EXPR((obj_idx) >= -0x8000L && (obj_idx) <= 0x7fffL), \ DUK_ASSERT_EXPR((stridx) >= 0 && (stridx) <= 0xffffL), \ duk_del_prop_stridx_short_raw((thr), (((duk_uint_t) (obj_idx)) << 16) + ((duk_uint_t) (stridx)))) #endif #define duk_del_prop_stridx_short(thr,obj_idx,stridx) \ duk_del_prop_stridx((thr), (obj_idx), (stridx)) DUK_INTERNAL_DECL duk_bool_t duk_has_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx); /* [] -> [] */ #if 0 /* Too few call sites to be useful. */ DUK_INTERNAL_DECL duk_bool_t duk_has_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args); #define duk_has_prop_stridx_short(thr,obj_idx,stridx) \ (DUK_ASSERT_EXPR((obj_idx) >= -0x8000L && (obj_idx) <= 0x7fffL), \ DUK_ASSERT_EXPR((stridx) >= 0 && (stridx) <= 0xffffL), \ duk_has_prop_stridx_short_raw((thr), (((duk_uint_t) (obj_idx)) << 16) + ((duk_uint_t) (stridx)))) #endif #define duk_has_prop_stridx_short(thr,obj_idx,stridx) \ duk_has_prop_stridx((thr), (obj_idx), (stridx)) DUK_INTERNAL_DECL void duk_xdef_prop(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t desc_flags); /* [key val] -> [] */ DUK_INTERNAL_DECL void duk_xdef_prop_index(duk_hthread *thr, duk_idx_t obj_idx, duk_uarridx_t arr_idx, duk_small_uint_t desc_flags); /* [val] -> [] */ /* XXX: Because stridx and desc_flags have a limited range, this call could * always pack stridx and desc_flags into a single argument. */ DUK_INTERNAL_DECL void duk_xdef_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx, duk_small_uint_t desc_flags); /* [val] -> [] */ DUK_INTERNAL_DECL void duk_xdef_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args); #define duk_xdef_prop_stridx_short(thr,obj_idx,stridx,desc_flags) \ (DUK_ASSERT_EXPR((duk_int_t) (obj_idx) >= -0x80L && (duk_int_t) (obj_idx) <= 0x7fL), \ DUK_ASSERT_EXPR((duk_int_t) (stridx) >= 0 && (duk_int_t) (stridx) <= 0xffffL), \ DUK_ASSERT_EXPR((duk_int_t) (desc_flags) >= 0 && (duk_int_t) (desc_flags) <= 0xffL), \ duk_xdef_prop_stridx_short_raw((thr), (((duk_uint_t) (obj_idx)) << 24) + (((duk_uint_t) (stridx)) << 8) + (duk_uint_t) (desc_flags))) #define duk_xdef_prop_wec(thr,obj_idx) \ duk_xdef_prop((thr), (obj_idx), DUK_PROPDESC_FLAGS_WEC) #define duk_xdef_prop_index_wec(thr,obj_idx,arr_idx) \ duk_xdef_prop_index((thr), (obj_idx), (arr_idx), DUK_PROPDESC_FLAGS_WEC) #define duk_xdef_prop_stridx_wec(thr,obj_idx,stridx) \ duk_xdef_prop_stridx((thr), (obj_idx), (stridx), DUK_PROPDESC_FLAGS_WEC) #define duk_xdef_prop_stridx_short_wec(thr,obj_idx,stridx) \ duk_xdef_prop_stridx_short((thr), (obj_idx), (stridx), DUK_PROPDESC_FLAGS_WEC) #if 0 /*unused*/ DUK_INTERNAL_DECL void duk_xdef_prop_stridx_builtin(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx, duk_small_int_t builtin_idx, duk_small_uint_t desc_flags); /* [] -> [] */ #endif DUK_INTERNAL_DECL void duk_xdef_prop_stridx_thrower(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx); /* [] -> [] */ DUK_INTERNAL_DECL duk_bool_t duk_get_method_stridx(duk_hthread *thr, duk_idx_t idx, duk_small_uint_t stridx); DUK_INTERNAL_DECL void duk_pack(duk_hthread *thr, duk_idx_t count); DUK_INTERNAL_DECL duk_idx_t duk_unpack_array_like(duk_hthread *thr, duk_idx_t idx); #if 0 DUK_INTERNAL_DECL void duk_unpack(duk_hthread *thr); #endif DUK_INTERNAL_DECL void duk_push_symbol_descriptive_string(duk_hthread *thr, duk_hstring *h); DUK_INTERNAL_DECL void duk_resolve_nonbound_function(duk_hthread *thr); DUK_INTERNAL_DECL duk_idx_t duk_get_top_require_min(duk_hthread *thr, duk_idx_t min_top); DUK_INTERNAL_DECL duk_idx_t duk_get_top_index_unsafe(duk_hthread *thr); DUK_INTERNAL_DECL void duk_pop_n_unsafe(duk_hthread *thr, duk_idx_t count); DUK_INTERNAL_DECL void duk_pop_unsafe(duk_hthread *thr); DUK_INTERNAL_DECL void duk_pop_2_unsafe(duk_hthread *thr); DUK_INTERNAL_DECL void duk_pop_3_unsafe(duk_hthread *thr); DUK_INTERNAL_DECL void duk_pop_n_nodecref_unsafe(duk_hthread *thr, duk_idx_t count); DUK_INTERNAL_DECL void duk_pop_nodecref_unsafe(duk_hthread *thr); DUK_INTERNAL_DECL void duk_pop_2_nodecref_unsafe(duk_hthread *thr); DUK_INTERNAL_DECL void duk_pop_3_nodecref_unsafe(duk_hthread *thr); DUK_INTERNAL_DECL void duk_pop_undefined(duk_hthread *thr); DUK_INTERNAL_DECL void duk_compact_m1(duk_hthread *thr); DUK_INTERNAL_DECL void duk_seal_freeze_raw(duk_hthread *thr, duk_idx_t obj_idx, duk_bool_t is_freeze); DUK_INTERNAL_DECL void duk_insert_undefined(duk_hthread *thr, duk_idx_t idx); DUK_INTERNAL_DECL void duk_insert_undefined_n(duk_hthread *thr, duk_idx_t idx, duk_idx_t count); DUK_INTERNAL_DECL void duk_concat_2(duk_hthread *thr); DUK_INTERNAL_DECL duk_int_t duk_pcall_method_flags(duk_hthread *thr, duk_idx_t nargs, duk_small_uint_t call_flags); #if defined(DUK_USE_SYMBOL_BUILTIN) DUK_INTERNAL_DECL void duk_to_primitive_ordinary(duk_hthread *thr, duk_idx_t idx, duk_int_t hint); #endif DUK_INTERNAL_DECL void duk_clear_prototype(duk_hthread *thr, duk_idx_t idx); /* Raw internal valstack access macros: access is unsafe so call site * must have a guarantee that the index is valid. When that is the case, * using these macro results in faster and smaller code than duk_get_tval(). * Both 'ctx' and 'idx' are evaluted multiple times, but only for asserts. */ #define DUK_ASSERT_VALID_NEGIDX(thr,idx) \ (DUK_ASSERT_EXPR((duk_int_t) (idx) < 0), DUK_ASSERT_EXPR(duk_is_valid_index((thr), (idx)))) #define DUK_ASSERT_VALID_POSIDX(thr,idx) \ (DUK_ASSERT_EXPR((duk_int_t) (idx) >= 0), DUK_ASSERT_EXPR(duk_is_valid_index((thr), (idx)))) #define DUK_GET_TVAL_NEGIDX(thr,idx) \ (DUK_ASSERT_VALID_NEGIDX((thr),(idx)), ((duk_hthread *) (thr))->valstack_top + (idx)) #define DUK_GET_TVAL_POSIDX(thr,idx) \ (DUK_ASSERT_VALID_POSIDX((thr),(idx)), ((duk_hthread *) (thr))->valstack_bottom + (idx)) #define DUK_GET_HOBJECT_NEGIDX(thr,idx) \ (DUK_ASSERT_VALID_NEGIDX((thr),(idx)), DUK_TVAL_GET_OBJECT(((duk_hthread *) (thr))->valstack_top + (idx))) #define DUK_GET_HOBJECT_POSIDX(thr,idx) \ (DUK_ASSERT_VALID_POSIDX((thr),(idx)), DUK_TVAL_GET_OBJECT(((duk_hthread *) (thr))->valstack_bottom + (idx))) #define DUK_GET_THIS_TVAL_PTR(thr) \ (DUK_ASSERT_EXPR((thr)->valstack_bottom > (thr)->valstack), \ (thr)->valstack_bottom - 1) DUK_INTERNAL_DECL duk_double_t duk_time_get_ecmascript_time(duk_hthread *thr); DUK_INTERNAL_DECL duk_double_t duk_time_get_ecmascript_time_nofrac(duk_hthread *thr); DUK_INTERNAL_DECL duk_double_t duk_time_get_monotonic_time(duk_hthread *thr); #endif /* DUK_API_INTERNAL_H_INCLUDED */ /* #include duk_hstring.h */ /* * Heap string representation. * * Strings are byte sequences ordinarily stored in extended UTF-8 format, * allowing values larger than the official UTF-8 range (used internally) * and also allowing UTF-8 encoding of surrogate pairs (CESU-8 format). * Strings may also be invalid UTF-8 altogether which is the case e.g. with * strings used as internal property names and raw buffers converted to * strings. In such cases the 'clen' field contains an inaccurate value. * * ECMAScript requires support for 32-bit long strings. However, since each * 16-bit codepoint can take 3 bytes in CESU-8, this representation can only * support about 1.4G codepoint long strings in extreme cases. This is not * really a practical issue. */ #if !defined(DUK_HSTRING_H_INCLUDED) #define DUK_HSTRING_H_INCLUDED /* Impose a maximum string length for now. Restricted artificially to * ensure adding a heap header length won't overflow size_t. The limit * should be synchronized with DUK_HBUFFER_MAX_BYTELEN. * * E5.1 makes provisions to support strings longer than 4G characters. * This limit should be eliminated on 64-bit platforms (and increased * closer to maximum support on 32-bit platforms). */ #if defined(DUK_USE_STRLEN16) #define DUK_HSTRING_MAX_BYTELEN (0x0000ffffUL) #else #define DUK_HSTRING_MAX_BYTELEN (0x7fffffffUL) #endif /* XXX: could add flags for "is valid CESU-8" (ECMAScript compatible strings), * "is valid UTF-8", "is valid extended UTF-8" (internal strings are not, * regexp bytecode is), and "contains non-BMP characters". These are not * needed right now. */ /* With lowmem builds the high 16 bits of duk_heaphdr are used for other * purposes, so this leaves 7 duk_heaphdr flags and 9 duk_hstring flags. */ #define DUK_HSTRING_FLAG_ASCII DUK_HEAPHDR_USER_FLAG(0) /* string is ASCII, clen == blen */ #define DUK_HSTRING_FLAG_ARRIDX DUK_HEAPHDR_USER_FLAG(1) /* string is a valid array index */ #define DUK_HSTRING_FLAG_SYMBOL DUK_HEAPHDR_USER_FLAG(2) /* string is a symbol (invalid utf-8) */ #define DUK_HSTRING_FLAG_HIDDEN DUK_HEAPHDR_USER_FLAG(3) /* string is a hidden symbol (implies symbol, Duktape 1.x internal string) */ #define DUK_HSTRING_FLAG_RESERVED_WORD DUK_HEAPHDR_USER_FLAG(4) /* string is a reserved word (non-strict) */ #define DUK_HSTRING_FLAG_STRICT_RESERVED_WORD DUK_HEAPHDR_USER_FLAG(5) /* string is a reserved word (strict) */ #define DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS DUK_HEAPHDR_USER_FLAG(6) /* string is 'eval' or 'arguments' */ #define DUK_HSTRING_FLAG_EXTDATA DUK_HEAPHDR_USER_FLAG(7) /* string data is external (duk_hstring_external) */ #define DUK_HSTRING_FLAG_PINNED_LITERAL DUK_HEAPHDR_USER_FLAG(8) /* string is a literal, and pinned */ #define DUK_HSTRING_HAS_ASCII(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ASCII) #define DUK_HSTRING_HAS_ARRIDX(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ARRIDX) #define DUK_HSTRING_HAS_SYMBOL(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_SYMBOL) #define DUK_HSTRING_HAS_HIDDEN(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_HIDDEN) #define DUK_HSTRING_HAS_RESERVED_WORD(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_RESERVED_WORD) #define DUK_HSTRING_HAS_STRICT_RESERVED_WORD(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_STRICT_RESERVED_WORD) #define DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS) #define DUK_HSTRING_HAS_EXTDATA(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EXTDATA) #define DUK_HSTRING_HAS_PINNED_LITERAL(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_PINNED_LITERAL) #define DUK_HSTRING_SET_ASCII(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ASCII) #define DUK_HSTRING_SET_ARRIDX(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ARRIDX) #define DUK_HSTRING_SET_SYMBOL(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_SYMBOL) #define DUK_HSTRING_SET_HIDDEN(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_HIDDEN) #define DUK_HSTRING_SET_RESERVED_WORD(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_RESERVED_WORD) #define DUK_HSTRING_SET_STRICT_RESERVED_WORD(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_STRICT_RESERVED_WORD) #define DUK_HSTRING_SET_EVAL_OR_ARGUMENTS(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS) #define DUK_HSTRING_SET_EXTDATA(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EXTDATA) #define DUK_HSTRING_SET_PINNED_LITERAL(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_PINNED_LITERAL) #define DUK_HSTRING_CLEAR_ASCII(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ASCII) #define DUK_HSTRING_CLEAR_ARRIDX(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ARRIDX) #define DUK_HSTRING_CLEAR_SYMBOL(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_SYMBOL) #define DUK_HSTRING_CLEAR_HIDDEN(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_HIDDEN) #define DUK_HSTRING_CLEAR_RESERVED_WORD(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_RESERVED_WORD) #define DUK_HSTRING_CLEAR_STRICT_RESERVED_WORD(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_STRICT_RESERVED_WORD) #define DUK_HSTRING_CLEAR_EVAL_OR_ARGUMENTS(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS) #define DUK_HSTRING_CLEAR_EXTDATA(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EXTDATA) #define DUK_HSTRING_CLEAR_PINNED_LITERAL(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_PINNED_LITERAL) #if 0 /* Slightly smaller code without explicit flag, but explicit flag * is very useful when 'clen' is dropped. */ #define DUK_HSTRING_IS_ASCII(x) (DUK_HSTRING_GET_BYTELEN((x)) == DUK_HSTRING_GET_CHARLEN((x))) #endif #define DUK_HSTRING_IS_ASCII(x) DUK_HSTRING_HAS_ASCII((x)) /* lazily set! */ #define DUK_HSTRING_IS_EMPTY(x) (DUK_HSTRING_GET_BYTELEN((x)) == 0) #if defined(DUK_USE_STRHASH16) #define DUK_HSTRING_GET_HASH(x) ((x)->hdr.h_flags >> 16) #define DUK_HSTRING_SET_HASH(x,v) do { \ (x)->hdr.h_flags = ((x)->hdr.h_flags & 0x0000ffffUL) | ((v) << 16); \ } while (0) #else #define DUK_HSTRING_GET_HASH(x) ((x)->hash) #define DUK_HSTRING_SET_HASH(x,v) do { \ (x)->hash = (v); \ } while (0) #endif #if defined(DUK_USE_STRLEN16) #define DUK_HSTRING_GET_BYTELEN(x) ((x)->hdr.h_strextra16) #define DUK_HSTRING_SET_BYTELEN(x,v) do { \ (x)->hdr.h_strextra16 = (v); \ } while (0) #if defined(DUK_USE_HSTRING_CLEN) #define DUK_HSTRING_GET_CHARLEN(x) duk_hstring_get_charlen((x)) #define DUK_HSTRING_SET_CHARLEN(x,v) do { \ (x)->clen16 = (v); \ } while (0) #else #define DUK_HSTRING_GET_CHARLEN(x) duk_hstring_get_charlen((x)) #define DUK_HSTRING_SET_CHARLEN(x,v) do { \ DUK_ASSERT(0); /* should never be called */ \ } while (0) #endif #else #define DUK_HSTRING_GET_BYTELEN(x) ((x)->blen) #define DUK_HSTRING_SET_BYTELEN(x,v) do { \ (x)->blen = (v); \ } while (0) #define DUK_HSTRING_GET_CHARLEN(x) duk_hstring_get_charlen((x)) #define DUK_HSTRING_SET_CHARLEN(x,v) do { \ (x)->clen = (v); \ } while (0) #endif #if defined(DUK_USE_HSTRING_EXTDATA) #define DUK_HSTRING_GET_EXTDATA(x) \ ((x)->extdata) #define DUK_HSTRING_GET_DATA(x) \ (DUK_HSTRING_HAS_EXTDATA((x)) ? \ DUK_HSTRING_GET_EXTDATA((const duk_hstring_external *) (x)) : ((const duk_uint8_t *) ((x) + 1))) #else #define DUK_HSTRING_GET_DATA(x) \ ((const duk_uint8_t *) ((x) + 1)) #endif #define DUK_HSTRING_GET_DATA_END(x) \ (DUK_HSTRING_GET_DATA((x)) + (x)->blen) /* Marker value; in E5 2^32-1 is not a valid array index (2^32-2 is highest * valid). */ #define DUK_HSTRING_NO_ARRAY_INDEX (0xffffffffUL) #if defined(DUK_USE_HSTRING_ARRIDX) #define DUK_HSTRING_GET_ARRIDX_FAST(h) ((h)->arridx) #define DUK_HSTRING_GET_ARRIDX_SLOW(h) ((h)->arridx) #else /* Get array index related to string (or return DUK_HSTRING_NO_ARRAY_INDEX); * avoids helper call if string has no array index value. */ #define DUK_HSTRING_GET_ARRIDX_FAST(h) \ (DUK_HSTRING_HAS_ARRIDX((h)) ? duk_js_to_arrayindex_hstring_fast_known((h)) : DUK_HSTRING_NO_ARRAY_INDEX) /* Slower but more compact variant. */ #define DUK_HSTRING_GET_ARRIDX_SLOW(h) \ (duk_js_to_arrayindex_hstring_fast((h))) #endif /* XXX: these actually fit into duk_hstring */ #define DUK_SYMBOL_TYPE_HIDDEN 0 #define DUK_SYMBOL_TYPE_GLOBAL 1 #define DUK_SYMBOL_TYPE_LOCAL 2 #define DUK_SYMBOL_TYPE_WELLKNOWN 3 /* Assertion for duk_hstring validity. */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_hstring_assert_valid(duk_hstring *h); #define DUK_HSTRING_ASSERT_VALID(h) do { duk_hstring_assert_valid((h)); } while (0) #else #define DUK_HSTRING_ASSERT_VALID(h) do {} while (0) #endif /* * Misc */ struct duk_hstring { /* Smaller heaphdr than for other objects, because strings are held * in string intern table which requires no link pointers. Much of * the 32-bit flags field is unused by flags, so we can stuff a 16-bit * field in there. */ duk_heaphdr_string hdr; /* String hash. */ #if defined(DUK_USE_STRHASH16) /* If 16-bit hash is in use, stuff it into duk_heaphdr_string flags. */ #else duk_uint32_t hash; #endif /* Precomputed array index (or DUK_HSTRING_NO_ARRAY_INDEX). */ #if defined(DUK_USE_HSTRING_ARRIDX) duk_uarridx_t arridx; #endif /* Length in bytes (not counting NUL term). */ #if defined(DUK_USE_STRLEN16) /* placed in duk_heaphdr_string */ #else duk_uint32_t blen; #endif /* Length in codepoints (must be E5 compatible). */ #if defined(DUK_USE_STRLEN16) #if defined(DUK_USE_HSTRING_CLEN) duk_uint16_t clen16; #else /* computed live */ #endif #else duk_uint32_t clen; #endif /* * String data of 'blen+1' bytes follows (+1 for NUL termination * convenience for C API). No alignment needs to be guaranteed * for strings, but fields above should guarantee alignment-by-4 * (but not alignment-by-8). */ }; /* The external string struct is defined even when the feature is inactive. */ struct duk_hstring_external { duk_hstring str; /* * For an external string, the NUL-terminated string data is stored * externally. The user must guarantee that data behind this pointer * doesn't change while it's used. */ const duk_uint8_t *extdata; }; /* * Prototypes */ DUK_INTERNAL_DECL duk_ucodepoint_t duk_hstring_char_code_at_raw(duk_hthread *thr, duk_hstring *h, duk_uint_t pos, duk_bool_t surrogate_aware); DUK_INTERNAL_DECL duk_bool_t duk_hstring_equals_ascii_cstring(duk_hstring *h, const char *cstr); DUK_INTERNAL_DECL duk_size_t duk_hstring_get_charlen(duk_hstring *h); #if !defined(DUK_USE_HSTRING_LAZY_CLEN) DUK_INTERNAL_DECL void duk_hstring_init_charlen(duk_hstring *h); #endif #endif /* DUK_HSTRING_H_INCLUDED */ /* #include duk_hobject.h */ /* * Heap object representation. * * Heap objects are used for ECMAScript objects, arrays, and functions, * but also for internal control like declarative and object environment * records. Compiled functions, native functions, and threads are also * objects but with an extended C struct. * * Objects provide the required ECMAScript semantics and exotic behaviors * especially for property access. * * Properties are stored in three conceptual parts: * * 1. A linear 'entry part' contains ordered key-value-attributes triples * and is the main method of string properties. * * 2. An optional linear 'array part' is used for array objects to store a * (dense) range of [0,N[ array indexed entries with default attributes * (writable, enumerable, configurable). If the array part would become * sparse or non-default attributes are required, the array part is * abandoned and moved to the 'entry part'. * * 3. An optional 'hash part' is used to optimize lookups of the entry * part; it is used only for objects with sufficiently many properties * and can be abandoned without loss of information. * * These three conceptual parts are stored in a single memory allocated area. * This minimizes memory allocation overhead but also means that all three * parts are resized together, and makes property access a bit complicated. */ #if !defined(DUK_HOBJECT_H_INCLUDED) #define DUK_HOBJECT_H_INCLUDED /* Object flags. Make sure this stays in sync with debugger object * inspection code. */ /* XXX: some flags are object subtype specific (e.g. common to all function * subtypes, duk_harray, etc) and could be reused for different subtypes. */ #define DUK_HOBJECT_FLAG_EXTENSIBLE DUK_HEAPHDR_USER_FLAG(0) /* object is extensible */ #define DUK_HOBJECT_FLAG_CONSTRUCTABLE DUK_HEAPHDR_USER_FLAG(1) /* object is constructable */ #define DUK_HOBJECT_FLAG_CALLABLE DUK_HEAPHDR_USER_FLAG(2) /* object is callable */ #define DUK_HOBJECT_FLAG_BOUNDFUNC DUK_HEAPHDR_USER_FLAG(3) /* object established using Function.prototype.bind() */ #define DUK_HOBJECT_FLAG_COMPFUNC DUK_HEAPHDR_USER_FLAG(4) /* object is a compiled function (duk_hcompfunc) */ #define DUK_HOBJECT_FLAG_NATFUNC DUK_HEAPHDR_USER_FLAG(5) /* object is a native function (duk_hnatfunc) */ #define DUK_HOBJECT_FLAG_BUFOBJ DUK_HEAPHDR_USER_FLAG(6) /* object is a buffer object (duk_hbufobj) (always exotic) */ #define DUK_HOBJECT_FLAG_FASTREFS DUK_HEAPHDR_USER_FLAG(7) /* object has no fields needing DECREF/marking beyond base duk_hobject header */ #define DUK_HOBJECT_FLAG_ARRAY_PART DUK_HEAPHDR_USER_FLAG(8) /* object has an array part (a_size may still be 0) */ #define DUK_HOBJECT_FLAG_STRICT DUK_HEAPHDR_USER_FLAG(9) /* function: function object is strict */ #define DUK_HOBJECT_FLAG_NOTAIL DUK_HEAPHDR_USER_FLAG(10) /* function: function must not be tail called */ #define DUK_HOBJECT_FLAG_NEWENV DUK_HEAPHDR_USER_FLAG(11) /* function: create new environment when called (see duk_hcompfunc) */ #define DUK_HOBJECT_FLAG_NAMEBINDING DUK_HEAPHDR_USER_FLAG(12) /* function: create binding for func name (function templates only, used for named function expressions) */ #define DUK_HOBJECT_FLAG_CREATEARGS DUK_HEAPHDR_USER_FLAG(13) /* function: create an arguments object on function call */ #define DUK_HOBJECT_FLAG_HAVE_FINALIZER DUK_HEAPHDR_USER_FLAG(14) /* object has a callable (own) finalizer property */ #define DUK_HOBJECT_FLAG_EXOTIC_ARRAY DUK_HEAPHDR_USER_FLAG(15) /* 'Array' object, array length and index exotic behavior */ #define DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ DUK_HEAPHDR_USER_FLAG(16) /* 'String' object, array index exotic behavior */ #define DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS DUK_HEAPHDR_USER_FLAG(17) /* 'Arguments' object and has arguments exotic behavior (non-strict callee) */ #define DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ DUK_HEAPHDR_USER_FLAG(18) /* 'Proxy' object */ #define DUK_HOBJECT_FLAG_SPECIAL_CALL DUK_HEAPHDR_USER_FLAG(19) /* special casing in call behavior, for .call(), .apply(), etc. */ #define DUK_HOBJECT_FLAG_CLASS_BASE DUK_HEAPHDR_USER_FLAG_NUMBER(20) #define DUK_HOBJECT_FLAG_CLASS_BITS 5 #define DUK_HOBJECT_GET_CLASS_NUMBER(h) \ DUK_HEAPHDR_GET_FLAG_RANGE(&(h)->hdr, DUK_HOBJECT_FLAG_CLASS_BASE, DUK_HOBJECT_FLAG_CLASS_BITS) #define DUK_HOBJECT_SET_CLASS_NUMBER(h,v) \ DUK_HEAPHDR_SET_FLAG_RANGE(&(h)->hdr, DUK_HOBJECT_FLAG_CLASS_BASE, DUK_HOBJECT_FLAG_CLASS_BITS, (v)) #define DUK_HOBJECT_GET_CLASS_MASK(h) \ (1UL << DUK_HEAPHDR_GET_FLAG_RANGE(&(h)->hdr, DUK_HOBJECT_FLAG_CLASS_BASE, DUK_HOBJECT_FLAG_CLASS_BITS)) /* Macro for creating flag initializer from a class number. * Unsigned type cast is needed to avoid warnings about coercing * a signed integer to an unsigned one; the largest class values * have the highest bit (bit 31) set which causes this. */ #define DUK_HOBJECT_CLASS_AS_FLAGS(v) (((duk_uint_t) (v)) << DUK_HOBJECT_FLAG_CLASS_BASE) /* E5 Section 8.6.2 + custom classes */ #define DUK_HOBJECT_CLASS_NONE 0 #define DUK_HOBJECT_CLASS_OBJECT 1 #define DUK_HOBJECT_CLASS_ARRAY 2 #define DUK_HOBJECT_CLASS_FUNCTION 3 #define DUK_HOBJECT_CLASS_ARGUMENTS 4 #define DUK_HOBJECT_CLASS_BOOLEAN 5 #define DUK_HOBJECT_CLASS_DATE 6 #define DUK_HOBJECT_CLASS_ERROR 7 #define DUK_HOBJECT_CLASS_JSON 8 #define DUK_HOBJECT_CLASS_MATH 9 #define DUK_HOBJECT_CLASS_NUMBER 10 #define DUK_HOBJECT_CLASS_REGEXP 11 #define DUK_HOBJECT_CLASS_STRING 12 #define DUK_HOBJECT_CLASS_GLOBAL 13 #define DUK_HOBJECT_CLASS_SYMBOL 14 #define DUK_HOBJECT_CLASS_OBJENV 15 /* custom */ #define DUK_HOBJECT_CLASS_DECENV 16 /* custom */ #define DUK_HOBJECT_CLASS_POINTER 17 /* custom */ #define DUK_HOBJECT_CLASS_THREAD 18 /* custom; implies DUK_HOBJECT_IS_THREAD */ #define DUK_HOBJECT_CLASS_BUFOBJ_MIN 19 #define DUK_HOBJECT_CLASS_ARRAYBUFFER 19 /* implies DUK_HOBJECT_IS_BUFOBJ */ #define DUK_HOBJECT_CLASS_DATAVIEW 20 #define DUK_HOBJECT_CLASS_INT8ARRAY 21 #define DUK_HOBJECT_CLASS_UINT8ARRAY 22 #define DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY 23 #define DUK_HOBJECT_CLASS_INT16ARRAY 24 #define DUK_HOBJECT_CLASS_UINT16ARRAY 25 #define DUK_HOBJECT_CLASS_INT32ARRAY 26 #define DUK_HOBJECT_CLASS_UINT32ARRAY 27 #define DUK_HOBJECT_CLASS_FLOAT32ARRAY 28 #define DUK_HOBJECT_CLASS_FLOAT64ARRAY 29 #define DUK_HOBJECT_CLASS_BUFOBJ_MAX 29 #define DUK_HOBJECT_CLASS_MAX 29 /* Class masks. */ #define DUK_HOBJECT_CMASK_ALL ((1UL << (DUK_HOBJECT_CLASS_MAX + 1)) - 1UL) #define DUK_HOBJECT_CMASK_NONE (1UL << DUK_HOBJECT_CLASS_NONE) #define DUK_HOBJECT_CMASK_ARGUMENTS (1UL << DUK_HOBJECT_CLASS_ARGUMENTS) #define DUK_HOBJECT_CMASK_ARRAY (1UL << DUK_HOBJECT_CLASS_ARRAY) #define DUK_HOBJECT_CMASK_BOOLEAN (1UL << DUK_HOBJECT_CLASS_BOOLEAN) #define DUK_HOBJECT_CMASK_DATE (1UL << DUK_HOBJECT_CLASS_DATE) #define DUK_HOBJECT_CMASK_ERROR (1UL << DUK_HOBJECT_CLASS_ERROR) #define DUK_HOBJECT_CMASK_FUNCTION (1UL << DUK_HOBJECT_CLASS_FUNCTION) #define DUK_HOBJECT_CMASK_JSON (1UL << DUK_HOBJECT_CLASS_JSON) #define DUK_HOBJECT_CMASK_MATH (1UL << DUK_HOBJECT_CLASS_MATH) #define DUK_HOBJECT_CMASK_NUMBER (1UL << DUK_HOBJECT_CLASS_NUMBER) #define DUK_HOBJECT_CMASK_OBJECT (1UL << DUK_HOBJECT_CLASS_OBJECT) #define DUK_HOBJECT_CMASK_REGEXP (1UL << DUK_HOBJECT_CLASS_REGEXP) #define DUK_HOBJECT_CMASK_STRING (1UL << DUK_HOBJECT_CLASS_STRING) #define DUK_HOBJECT_CMASK_GLOBAL (1UL << DUK_HOBJECT_CLASS_GLOBAL) #define DUK_HOBJECT_CMASK_SYMBOL (1UL << DUK_HOBJECT_CLASS_SYMBOL) #define DUK_HOBJECT_CMASK_OBJENV (1UL << DUK_HOBJECT_CLASS_OBJENV) #define DUK_HOBJECT_CMASK_DECENV (1UL << DUK_HOBJECT_CLASS_DECENV) #define DUK_HOBJECT_CMASK_POINTER (1UL << DUK_HOBJECT_CLASS_POINTER) #define DUK_HOBJECT_CMASK_ARRAYBUFFER (1UL << DUK_HOBJECT_CLASS_ARRAYBUFFER) #define DUK_HOBJECT_CMASK_DATAVIEW (1UL << DUK_HOBJECT_CLASS_DATAVIEW) #define DUK_HOBJECT_CMASK_INT8ARRAY (1UL << DUK_HOBJECT_CLASS_INT8ARRAY) #define DUK_HOBJECT_CMASK_UINT8ARRAY (1UL << DUK_HOBJECT_CLASS_UINT8ARRAY) #define DUK_HOBJECT_CMASK_UINT8CLAMPEDARRAY (1UL << DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY) #define DUK_HOBJECT_CMASK_INT16ARRAY (1UL << DUK_HOBJECT_CLASS_INT16ARRAY) #define DUK_HOBJECT_CMASK_UINT16ARRAY (1UL << DUK_HOBJECT_CLASS_UINT16ARRAY) #define DUK_HOBJECT_CMASK_INT32ARRAY (1UL << DUK_HOBJECT_CLASS_INT32ARRAY) #define DUK_HOBJECT_CMASK_UINT32ARRAY (1UL << DUK_HOBJECT_CLASS_UINT32ARRAY) #define DUK_HOBJECT_CMASK_FLOAT32ARRAY (1UL << DUK_HOBJECT_CLASS_FLOAT32ARRAY) #define DUK_HOBJECT_CMASK_FLOAT64ARRAY (1UL << DUK_HOBJECT_CLASS_FLOAT64ARRAY) #define DUK_HOBJECT_CMASK_ALL_BUFOBJS \ (DUK_HOBJECT_CMASK_ARRAYBUFFER | \ DUK_HOBJECT_CMASK_DATAVIEW | \ DUK_HOBJECT_CMASK_INT8ARRAY | \ DUK_HOBJECT_CMASK_UINT8ARRAY | \ DUK_HOBJECT_CMASK_UINT8CLAMPEDARRAY | \ DUK_HOBJECT_CMASK_INT16ARRAY | \ DUK_HOBJECT_CMASK_UINT16ARRAY | \ DUK_HOBJECT_CMASK_INT32ARRAY | \ DUK_HOBJECT_CMASK_UINT32ARRAY | \ DUK_HOBJECT_CMASK_FLOAT32ARRAY | \ DUK_HOBJECT_CMASK_FLOAT64ARRAY) #define DUK_HOBJECT_IS_OBJENV(h) (DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_OBJENV) #define DUK_HOBJECT_IS_DECENV(h) (DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_DECENV) #define DUK_HOBJECT_IS_ENV(h) (DUK_HOBJECT_IS_OBJENV((h)) || DUK_HOBJECT_IS_DECENV((h))) #define DUK_HOBJECT_IS_ARRAY(h) DUK_HOBJECT_HAS_EXOTIC_ARRAY((h)) /* Rely on class Array <=> exotic Array */ #define DUK_HOBJECT_IS_BOUNDFUNC(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BOUNDFUNC) #define DUK_HOBJECT_IS_COMPFUNC(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_COMPFUNC) #define DUK_HOBJECT_IS_NATFUNC(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NATFUNC) #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) #define DUK_HOBJECT_IS_BUFOBJ(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BUFOBJ) #else #define DUK_HOBJECT_IS_BUFOBJ(h) 0 #endif #define DUK_HOBJECT_IS_THREAD(h) (DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_THREAD) #if defined(DUK_USE_ES6_PROXY) #define DUK_HOBJECT_IS_PROXY(h) DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ((h)) #else #define DUK_HOBJECT_IS_PROXY(h) 0 #endif #define DUK_HOBJECT_IS_NONBOUND_FUNCTION(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, \ DUK_HOBJECT_FLAG_COMPFUNC | \ DUK_HOBJECT_FLAG_NATFUNC) #define DUK_HOBJECT_IS_FUNCTION(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, \ DUK_HOBJECT_FLAG_BOUNDFUNC | \ DUK_HOBJECT_FLAG_COMPFUNC | \ DUK_HOBJECT_FLAG_NATFUNC) #define DUK_HOBJECT_IS_CALLABLE(h) DUK_HOBJECT_HAS_CALLABLE((h)) /* Object has any exotic behavior(s). */ #define DUK_HOBJECT_EXOTIC_BEHAVIOR_FLAGS (DUK_HOBJECT_FLAG_EXOTIC_ARRAY | \ DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS | \ DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ | \ DUK_HOBJECT_FLAG_BUFOBJ | \ DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ) #define DUK_HOBJECT_HAS_EXOTIC_BEHAVIOR(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_EXOTIC_BEHAVIOR_FLAGS) /* Object has any virtual properties (not counting Proxy behavior). */ #define DUK_HOBJECT_VIRTUAL_PROPERTY_FLAGS (DUK_HOBJECT_FLAG_EXOTIC_ARRAY | \ DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ | \ DUK_HOBJECT_FLAG_BUFOBJ) #define DUK_HOBJECT_HAS_VIRTUAL_PROPERTIES(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_VIRTUAL_PROPERTY_FLAGS) #define DUK_HOBJECT_HAS_EXTENSIBLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXTENSIBLE) #define DUK_HOBJECT_HAS_CONSTRUCTABLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CONSTRUCTABLE) #define DUK_HOBJECT_HAS_CALLABLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CALLABLE) #define DUK_HOBJECT_HAS_BOUNDFUNC(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BOUNDFUNC) #define DUK_HOBJECT_HAS_COMPFUNC(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_COMPFUNC) #define DUK_HOBJECT_HAS_NATFUNC(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NATFUNC) #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) #define DUK_HOBJECT_HAS_BUFOBJ(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BUFOBJ) #else #define DUK_HOBJECT_HAS_BUFOBJ(h) 0 #endif #define DUK_HOBJECT_HAS_FASTREFS(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_FASTREFS) #define DUK_HOBJECT_HAS_ARRAY_PART(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_ARRAY_PART) #define DUK_HOBJECT_HAS_STRICT(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_STRICT) #define DUK_HOBJECT_HAS_NOTAIL(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NOTAIL) #define DUK_HOBJECT_HAS_NEWENV(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NEWENV) #define DUK_HOBJECT_HAS_NAMEBINDING(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NAMEBINDING) #define DUK_HOBJECT_HAS_CREATEARGS(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CREATEARGS) #define DUK_HOBJECT_HAS_HAVE_FINALIZER(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_HAVE_FINALIZER) #define DUK_HOBJECT_HAS_EXOTIC_ARRAY(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARRAY) #define DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ) #define DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS) #if defined(DUK_USE_ES6_PROXY) #define DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ) #else #define DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h) 0 #endif #define DUK_HOBJECT_HAS_SPECIAL_CALL(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_SPECIAL_CALL) #define DUK_HOBJECT_SET_EXTENSIBLE(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXTENSIBLE) #define DUK_HOBJECT_SET_CONSTRUCTABLE(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CONSTRUCTABLE) #define DUK_HOBJECT_SET_CALLABLE(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CALLABLE) #define DUK_HOBJECT_SET_BOUNDFUNC(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BOUNDFUNC) #define DUK_HOBJECT_SET_COMPFUNC(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_COMPFUNC) #define DUK_HOBJECT_SET_NATFUNC(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NATFUNC) #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) #define DUK_HOBJECT_SET_BUFOBJ(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BUFOBJ) #endif #define DUK_HOBJECT_SET_FASTREFS(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_FASTREFS) #define DUK_HOBJECT_SET_ARRAY_PART(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_ARRAY_PART) #define DUK_HOBJECT_SET_STRICT(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_STRICT) #define DUK_HOBJECT_SET_NOTAIL(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NOTAIL) #define DUK_HOBJECT_SET_NEWENV(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NEWENV) #define DUK_HOBJECT_SET_NAMEBINDING(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NAMEBINDING) #define DUK_HOBJECT_SET_CREATEARGS(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CREATEARGS) #define DUK_HOBJECT_SET_HAVE_FINALIZER(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_HAVE_FINALIZER) #define DUK_HOBJECT_SET_EXOTIC_ARRAY(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARRAY) #define DUK_HOBJECT_SET_EXOTIC_STRINGOBJ(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ) #define DUK_HOBJECT_SET_EXOTIC_ARGUMENTS(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS) #if defined(DUK_USE_ES6_PROXY) #define DUK_HOBJECT_SET_EXOTIC_PROXYOBJ(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ) #endif #define DUK_HOBJECT_SET_SPECIAL_CALL(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_SPECIAL_CALL) #define DUK_HOBJECT_CLEAR_EXTENSIBLE(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXTENSIBLE) #define DUK_HOBJECT_CLEAR_CONSTRUCTABLE(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CONSTRUCTABLE) #define DUK_HOBJECT_CLEAR_CALLABLE(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CALLABLE) #define DUK_HOBJECT_CLEAR_BOUNDFUNC(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BOUNDFUNC) #define DUK_HOBJECT_CLEAR_COMPFUNC(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_COMPFUNC) #define DUK_HOBJECT_CLEAR_NATFUNC(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NATFUNC) #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) #define DUK_HOBJECT_CLEAR_BUFOBJ(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BUFOBJ) #endif #define DUK_HOBJECT_CLEAR_FASTREFS(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_FASTREFS) #define DUK_HOBJECT_CLEAR_ARRAY_PART(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_ARRAY_PART) #define DUK_HOBJECT_CLEAR_STRICT(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_STRICT) #define DUK_HOBJECT_CLEAR_NOTAIL(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NOTAIL) #define DUK_HOBJECT_CLEAR_NEWENV(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NEWENV) #define DUK_HOBJECT_CLEAR_NAMEBINDING(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NAMEBINDING) #define DUK_HOBJECT_CLEAR_CREATEARGS(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CREATEARGS) #define DUK_HOBJECT_CLEAR_HAVE_FINALIZER(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_HAVE_FINALIZER) #define DUK_HOBJECT_CLEAR_EXOTIC_ARRAY(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARRAY) #define DUK_HOBJECT_CLEAR_EXOTIC_STRINGOBJ(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ) #define DUK_HOBJECT_CLEAR_EXOTIC_ARGUMENTS(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS) #if defined(DUK_USE_ES6_PROXY) #define DUK_HOBJECT_CLEAR_EXOTIC_PROXYOBJ(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ) #endif #define DUK_HOBJECT_CLEAR_SPECIAL_CALL(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_SPECIAL_CALL) /* Object can/cannot use FASTREFS, i.e. has no strong reference fields beyond * duk_hobject base header. This is used just for asserts so doesn't need to * be optimized. */ #define DUK_HOBJECT_PROHIBITS_FASTREFS(h) \ (DUK_HOBJECT_IS_COMPFUNC((h)) || DUK_HOBJECT_IS_DECENV((h)) || DUK_HOBJECT_IS_OBJENV((h)) || \ DUK_HOBJECT_IS_BUFOBJ((h)) || DUK_HOBJECT_IS_THREAD((h)) || DUK_HOBJECT_IS_PROXY((h)) || \ DUK_HOBJECT_IS_BOUNDFUNC((h))) #define DUK_HOBJECT_ALLOWS_FASTREFS(h) (!DUK_HOBJECT_PROHIBITS_FASTREFS((h))) /* Flags used for property attributes in duk_propdesc and packed flags. * Must fit into 8 bits. */ #define DUK_PROPDESC_FLAG_WRITABLE (1U << 0) /* E5 Section 8.6.1 */ #define DUK_PROPDESC_FLAG_ENUMERABLE (1U << 1) /* E5 Section 8.6.1 */ #define DUK_PROPDESC_FLAG_CONFIGURABLE (1U << 2) /* E5 Section 8.6.1 */ #define DUK_PROPDESC_FLAG_ACCESSOR (1U << 3) /* accessor */ #define DUK_PROPDESC_FLAG_VIRTUAL (1U << 4) /* property is virtual: used in duk_propdesc, never stored * (used by e.g. buffer virtual properties) */ #define DUK_PROPDESC_FLAGS_MASK (DUK_PROPDESC_FLAG_WRITABLE | \ DUK_PROPDESC_FLAG_ENUMERABLE | \ DUK_PROPDESC_FLAG_CONFIGURABLE | \ DUK_PROPDESC_FLAG_ACCESSOR) /* Additional flags which are passed in the same flags argument as property * flags but are not stored in object properties. */ #define DUK_PROPDESC_FLAG_NO_OVERWRITE (1U << 4) /* internal define property: skip write silently if exists */ /* Convenience defines for property attributes. */ #define DUK_PROPDESC_FLAGS_NONE 0 #define DUK_PROPDESC_FLAGS_W (DUK_PROPDESC_FLAG_WRITABLE) #define DUK_PROPDESC_FLAGS_E (DUK_PROPDESC_FLAG_ENUMERABLE) #define DUK_PROPDESC_FLAGS_C (DUK_PROPDESC_FLAG_CONFIGURABLE) #define DUK_PROPDESC_FLAGS_WE (DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_ENUMERABLE) #define DUK_PROPDESC_FLAGS_WC (DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_CONFIGURABLE) #define DUK_PROPDESC_FLAGS_EC (DUK_PROPDESC_FLAG_ENUMERABLE | DUK_PROPDESC_FLAG_CONFIGURABLE) #define DUK_PROPDESC_FLAGS_WEC (DUK_PROPDESC_FLAG_WRITABLE | \ DUK_PROPDESC_FLAG_ENUMERABLE | \ DUK_PROPDESC_FLAG_CONFIGURABLE) /* Flags for duk_hobject_get_own_propdesc() and variants. */ #define DUK_GETDESC_FLAG_PUSH_VALUE (1U << 0) /* push value to stack */ #define DUK_GETDESC_FLAG_IGNORE_PROTOLOOP (1U << 1) /* don't throw for prototype loop */ /* * Macro for object validity check * * Assert for currently guaranteed relations between flags, for instance. */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_hobject_assert_valid(duk_hobject *h); #define DUK_HOBJECT_ASSERT_VALID(h) do { duk_hobject_assert_valid((h)); } while (0) #else #define DUK_HOBJECT_ASSERT_VALID(h) do {} while (0) #endif /* * Macros to access the 'props' allocation. */ #if defined(DUK_USE_HEAPPTR16) #define DUK_HOBJECT_GET_PROPS(heap,h) \ ((duk_uint8_t *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, ((duk_heaphdr *) (h))->h_extra16)) #define DUK_HOBJECT_SET_PROPS(heap,h,x) do { \ ((duk_heaphdr *) (h))->h_extra16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (x)); \ } while (0) #else #define DUK_HOBJECT_GET_PROPS(heap,h) \ ((h)->props) #define DUK_HOBJECT_SET_PROPS(heap,h,x) do { \ (h)->props = (duk_uint8_t *) (x); \ } while (0) #endif #if defined(DUK_USE_HOBJECT_LAYOUT_1) /* LAYOUT 1 */ #define DUK_HOBJECT_E_GET_KEY_BASE(heap,h) \ ((duk_hstring **) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) \ )) #define DUK_HOBJECT_E_GET_VALUE_BASE(heap,h) \ ((duk_propvalue *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * sizeof(duk_hstring *) \ )) #define DUK_HOBJECT_E_GET_FLAGS_BASE(heap,h) \ ((duk_uint8_t *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue)) \ )) #define DUK_HOBJECT_A_GET_BASE(heap,h) \ ((duk_tval *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) \ )) #define DUK_HOBJECT_H_GET_BASE(heap,h) \ ((duk_uint32_t *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \ DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) \ )) #define DUK_HOBJECT_P_COMPUTE_SIZE(n_ent,n_arr,n_hash) \ ( \ (n_ent) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \ (n_arr) * sizeof(duk_tval) + \ (n_hash) * sizeof(duk_uint32_t) \ ) #define DUK_HOBJECT_P_SET_REALLOC_PTRS(p_base,set_e_k,set_e_pv,set_e_f,set_a,set_h,n_ent,n_arr,n_hash) do { \ (set_e_k) = (duk_hstring **) (void *) (p_base); \ (set_e_pv) = (duk_propvalue *) (void *) ((set_e_k) + (n_ent)); \ (set_e_f) = (duk_uint8_t *) (void *) ((set_e_pv) + (n_ent)); \ (set_a) = (duk_tval *) (void *) ((set_e_f) + (n_ent)); \ (set_h) = (duk_uint32_t *) (void *) ((set_a) + (n_arr)); \ } while (0) #elif defined(DUK_USE_HOBJECT_LAYOUT_2) /* LAYOUT 2 */ #if (DUK_USE_ALIGN_BY == 4) #define DUK_HOBJECT_E_FLAG_PADDING(e_sz) ((4 - (e_sz)) & 0x03) #elif (DUK_USE_ALIGN_BY == 8) #define DUK_HOBJECT_E_FLAG_PADDING(e_sz) ((8 - (e_sz)) & 0x07) #elif (DUK_USE_ALIGN_BY == 1) #define DUK_HOBJECT_E_FLAG_PADDING(e_sz) 0 #else #error invalid DUK_USE_ALIGN_BY #endif #define DUK_HOBJECT_E_GET_KEY_BASE(heap,h) \ ((duk_hstring **) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * sizeof(duk_propvalue) \ )) #define DUK_HOBJECT_E_GET_VALUE_BASE(heap,h) \ ((duk_propvalue *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) \ )) #define DUK_HOBJECT_E_GET_FLAGS_BASE(heap,h) \ ((duk_uint8_t *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue)) \ )) #define DUK_HOBJECT_A_GET_BASE(heap,h) \ ((duk_tval *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \ DUK_HOBJECT_E_FLAG_PADDING(DUK_HOBJECT_GET_ESIZE((h))) \ )) #define DUK_HOBJECT_H_GET_BASE(heap,h) \ ((duk_uint32_t *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \ DUK_HOBJECT_E_FLAG_PADDING(DUK_HOBJECT_GET_ESIZE((h))) + \ DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) \ )) #define DUK_HOBJECT_P_COMPUTE_SIZE(n_ent,n_arr,n_hash) \ ( \ (n_ent) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \ DUK_HOBJECT_E_FLAG_PADDING((n_ent)) + \ (n_arr) * sizeof(duk_tval) + \ (n_hash) * sizeof(duk_uint32_t) \ ) #define DUK_HOBJECT_P_SET_REALLOC_PTRS(p_base,set_e_k,set_e_pv,set_e_f,set_a,set_h,n_ent,n_arr,n_hash) do { \ (set_e_pv) = (duk_propvalue *) (void *) (p_base); \ (set_e_k) = (duk_hstring **) (void *) ((set_e_pv) + (n_ent)); \ (set_e_f) = (duk_uint8_t *) (void *) ((set_e_k) + (n_ent)); \ (set_a) = (duk_tval *) (void *) (((duk_uint8_t *) (set_e_f)) + \ sizeof(duk_uint8_t) * (n_ent) + \ DUK_HOBJECT_E_FLAG_PADDING((n_ent))); \ (set_h) = (duk_uint32_t *) (void *) ((set_a) + (n_arr)); \ } while (0) #elif defined(DUK_USE_HOBJECT_LAYOUT_3) /* LAYOUT 3 */ #define DUK_HOBJECT_E_GET_KEY_BASE(heap,h) \ ((duk_hstring **) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * sizeof(duk_propvalue) + \ DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) \ )) #define DUK_HOBJECT_E_GET_VALUE_BASE(heap,h) \ ((duk_propvalue *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) \ )) #define DUK_HOBJECT_E_GET_FLAGS_BASE(heap,h) \ ((duk_uint8_t *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_propvalue) + sizeof(duk_hstring *)) + \ DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) + \ DUK_HOBJECT_GET_HSIZE((h)) * sizeof(duk_uint32_t) \ )) #define DUK_HOBJECT_A_GET_BASE(heap,h) \ ((duk_tval *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * sizeof(duk_propvalue) \ )) #define DUK_HOBJECT_H_GET_BASE(heap,h) \ ((duk_uint32_t *) (void *) ( \ DUK_HOBJECT_GET_PROPS((heap), (h)) + \ DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_propvalue) + sizeof(duk_hstring *)) + \ DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) \ )) #define DUK_HOBJECT_P_COMPUTE_SIZE(n_ent,n_arr,n_hash) \ ( \ (n_ent) * (sizeof(duk_propvalue) + sizeof(duk_hstring *) + sizeof(duk_uint8_t)) + \ (n_arr) * sizeof(duk_tval) + \ (n_hash) * sizeof(duk_uint32_t) \ ) #define DUK_HOBJECT_P_SET_REALLOC_PTRS(p_base,set_e_k,set_e_pv,set_e_f,set_a,set_h,n_ent,n_arr,n_hash) do { \ (set_e_pv) = (duk_propvalue *) (void *) (p_base); \ (set_a) = (duk_tval *) (void *) ((set_e_pv) + (n_ent)); \ (set_e_k) = (duk_hstring **) (void *) ((set_a) + (n_arr)); \ (set_h) = (duk_uint32_t *) (void *) ((set_e_k) + (n_ent)); \ (set_e_f) = (duk_uint8_t *) (void *) ((set_h) + (n_hash)); \ } while (0) #else #error invalid hobject layout defines #endif /* hobject property layout */ #define DUK_HOBJECT_P_ALLOC_SIZE(h) \ DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE((h)), DUK_HOBJECT_GET_ASIZE((h)), DUK_HOBJECT_GET_HSIZE((h))) #define DUK_HOBJECT_E_GET_KEY(heap,h,i) (DUK_HOBJECT_E_GET_KEY_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_E_GET_KEY_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_KEY_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_E_GET_VALUE(heap,h,i) (DUK_HOBJECT_E_GET_VALUE_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_E_GET_VALUE_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_VALUE_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_E_GET_VALUE_TVAL(heap,h,i) (DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).v) #define DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).v) #define DUK_HOBJECT_E_GET_VALUE_GETTER(heap,h,i) (DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.get) #define DUK_HOBJECT_E_GET_VALUE_GETTER_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.get) #define DUK_HOBJECT_E_GET_VALUE_SETTER(heap,h,i) (DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.set) #define DUK_HOBJECT_E_GET_VALUE_SETTER_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.set) #define DUK_HOBJECT_E_GET_FLAGS(heap,h,i) (DUK_HOBJECT_E_GET_FLAGS_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_E_GET_FLAGS_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_FLAGS_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_A_GET_VALUE(heap,h,i) (DUK_HOBJECT_A_GET_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_A_GET_VALUE_PTR(heap,h,i) (&DUK_HOBJECT_A_GET_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_H_GET_INDEX(heap,h,i) (DUK_HOBJECT_H_GET_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_H_GET_INDEX_PTR(heap,h,i) (&DUK_HOBJECT_H_GET_BASE((heap), (h))[(i)]) #define DUK_HOBJECT_E_SET_KEY(heap,h,i,k) do { \ DUK_HOBJECT_E_GET_KEY((heap), (h), (i)) = (k); \ } while (0) #define DUK_HOBJECT_E_SET_VALUE(heap,h,i,v) do { \ DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)) = (v); \ } while (0) #define DUK_HOBJECT_E_SET_VALUE_TVAL(heap,h,i,v) do { \ DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).v = (v); \ } while (0) #define DUK_HOBJECT_E_SET_VALUE_GETTER(heap,h,i,v) do { \ DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.get = (v); \ } while (0) #define DUK_HOBJECT_E_SET_VALUE_SETTER(heap,h,i,v) do { \ DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.set = (v); \ } while (0) #define DUK_HOBJECT_E_SET_FLAGS(heap,h,i,f) do { \ DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) = (duk_uint8_t) (f); \ } while (0) #define DUK_HOBJECT_A_SET_VALUE(heap,h,i,v) do { \ DUK_HOBJECT_A_GET_VALUE((heap), (h), (i)) = (v); \ } while (0) #define DUK_HOBJECT_A_SET_VALUE_TVAL(heap,h,i,v) \ DUK_HOBJECT_A_SET_VALUE((heap), (h), (i), (v)) /* alias for above */ #define DUK_HOBJECT_H_SET_INDEX(heap,h,i,v) do { \ DUK_HOBJECT_H_GET_INDEX((heap), (h), (i)) = (v); \ } while (0) #define DUK_HOBJECT_E_SET_FLAG_BITS(heap,h,i,mask) do { \ DUK_HOBJECT_E_GET_FLAGS_BASE((heap), (h))[(i)] |= (mask); \ } while (0) #define DUK_HOBJECT_E_CLEAR_FLAG_BITS(heap,h,i,mask) do { \ DUK_HOBJECT_E_GET_FLAGS_BASE((heap), (h))[(i)] &= ~(mask); \ } while (0) #define DUK_HOBJECT_E_SLOT_IS_WRITABLE(heap,h,i) ((DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) & DUK_PROPDESC_FLAG_WRITABLE) != 0) #define DUK_HOBJECT_E_SLOT_IS_ENUMERABLE(heap,h,i) ((DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) & DUK_PROPDESC_FLAG_ENUMERABLE) != 0) #define DUK_HOBJECT_E_SLOT_IS_CONFIGURABLE(heap,h,i) ((DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) & DUK_PROPDESC_FLAG_CONFIGURABLE) != 0) #define DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap,h,i) ((DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) & DUK_PROPDESC_FLAG_ACCESSOR) != 0) #define DUK_HOBJECT_E_SLOT_SET_WRITABLE(heap,h,i) DUK_HOBJECT_E_SET_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_WRITABLE) #define DUK_HOBJECT_E_SLOT_SET_ENUMERABLE(heap,h,i) DUK_HOBJECT_E_SET_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_ENUMERABLE) #define DUK_HOBJECT_E_SLOT_SET_CONFIGURABLE(heap,h,i) DUK_HOBJECT_E_SET_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_CONFIGURABLE) #define DUK_HOBJECT_E_SLOT_SET_ACCESSOR(heap,h,i) DUK_HOBJECT_E_SET_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_ACCESSOR) #define DUK_HOBJECT_E_SLOT_CLEAR_WRITABLE(heap,h,i) DUK_HOBJECT_E_CLEAR_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_WRITABLE) #define DUK_HOBJECT_E_SLOT_CLEAR_ENUMERABLE(heap,h,i) DUK_HOBJECT_E_CLEAR_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_ENUMERABLE) #define DUK_HOBJECT_E_SLOT_CLEAR_CONFIGURABLE(heap,h,i) DUK_HOBJECT_E_CLEAR_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_CONFIGURABLE) #define DUK_HOBJECT_E_SLOT_CLEAR_ACCESSOR(heap,h,i) DUK_HOBJECT_E_CLEAR_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_ACCESSOR) #define DUK_PROPDESC_IS_WRITABLE(p) (((p)->flags & DUK_PROPDESC_FLAG_WRITABLE) != 0) #define DUK_PROPDESC_IS_ENUMERABLE(p) (((p)->flags & DUK_PROPDESC_FLAG_ENUMERABLE) != 0) #define DUK_PROPDESC_IS_CONFIGURABLE(p) (((p)->flags & DUK_PROPDESC_FLAG_CONFIGURABLE) != 0) #define DUK_PROPDESC_IS_ACCESSOR(p) (((p)->flags & DUK_PROPDESC_FLAG_ACCESSOR) != 0) #define DUK_HOBJECT_HASHIDX_UNUSED 0xffffffffUL #define DUK_HOBJECT_HASHIDX_DELETED 0xfffffffeUL /* * Macros for accessing size fields */ #if defined(DUK_USE_OBJSIZES16) #define DUK_HOBJECT_GET_ESIZE(h) ((h)->e_size16) #define DUK_HOBJECT_SET_ESIZE(h,v) do { (h)->e_size16 = (v); } while (0) #define DUK_HOBJECT_GET_ENEXT(h) ((h)->e_next16) #define DUK_HOBJECT_SET_ENEXT(h,v) do { (h)->e_next16 = (v); } while (0) #define DUK_HOBJECT_POSTINC_ENEXT(h) ((h)->e_next16++) #define DUK_HOBJECT_GET_ASIZE(h) ((h)->a_size16) #define DUK_HOBJECT_SET_ASIZE(h,v) do { (h)->a_size16 = (v); } while (0) #if defined(DUK_USE_HOBJECT_HASH_PART) #define DUK_HOBJECT_GET_HSIZE(h) ((h)->h_size16) #define DUK_HOBJECT_SET_HSIZE(h,v) do { (h)->h_size16 = (v); } while (0) #else #define DUK_HOBJECT_GET_HSIZE(h) 0 #define DUK_HOBJECT_SET_HSIZE(h,v) do { DUK_ASSERT((v) == 0); } while (0) #endif #else #define DUK_HOBJECT_GET_ESIZE(h) ((h)->e_size) #define DUK_HOBJECT_SET_ESIZE(h,v) do { (h)->e_size = (v); } while (0) #define DUK_HOBJECT_GET_ENEXT(h) ((h)->e_next) #define DUK_HOBJECT_SET_ENEXT(h,v) do { (h)->e_next = (v); } while (0) #define DUK_HOBJECT_POSTINC_ENEXT(h) ((h)->e_next++) #define DUK_HOBJECT_GET_ASIZE(h) ((h)->a_size) #define DUK_HOBJECT_SET_ASIZE(h,v) do { (h)->a_size = (v); } while (0) #if defined(DUK_USE_HOBJECT_HASH_PART) #define DUK_HOBJECT_GET_HSIZE(h) ((h)->h_size) #define DUK_HOBJECT_SET_HSIZE(h,v) do { (h)->h_size = (v); } while (0) #else #define DUK_HOBJECT_GET_HSIZE(h) 0 #define DUK_HOBJECT_SET_HSIZE(h,v) do { DUK_ASSERT((v) == 0); } while (0) #endif #endif /* * Misc */ /* Maximum prototype traversal depth. Sanity limit which handles e.g. * prototype loops (even complex ones like 1->2->3->4->2->3->4->2->3->4). */ #define DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY 10000L /* * ECMAScript [[Class]] */ /* range check not necessary because all 4-bit values are mapped */ #define DUK_HOBJECT_CLASS_NUMBER_TO_STRIDX(n) duk_class_number_to_stridx[(n)] #define DUK_HOBJECT_GET_CLASS_STRING(heap,h) \ DUK_HEAP_GET_STRING( \ (heap), \ DUK_HOBJECT_CLASS_NUMBER_TO_STRIDX(DUK_HOBJECT_GET_CLASS_NUMBER((h))) \ ) /* * Macros for property handling */ #if defined(DUK_USE_HEAPPTR16) #define DUK_HOBJECT_GET_PROTOTYPE(heap,h) \ ((duk_hobject *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->prototype16)) #define DUK_HOBJECT_SET_PROTOTYPE(heap,h,x) do { \ (h)->prototype16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (x)); \ } while (0) #else #define DUK_HOBJECT_GET_PROTOTYPE(heap,h) \ ((h)->prototype) #define DUK_HOBJECT_SET_PROTOTYPE(heap,h,x) do { \ (h)->prototype = (x); \ } while (0) #endif /* Set prototype, DECREF earlier value, INCREF new value (tolerating NULLs). */ #define DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr,h,p) duk_hobject_set_prototype_updref((thr), (h), (p)) /* Set initial prototype, assume NULL previous prototype, INCREF new value, * tolerate NULL. */ #define DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr,h,proto) do { \ duk_hthread *duk__thr = (thr); \ duk_hobject *duk__obj = (h); \ duk_hobject *duk__proto = (proto); \ DUK_UNREF(duk__thr); \ DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(duk__thr->heap, duk__obj) == NULL); \ DUK_HOBJECT_SET_PROTOTYPE(duk__thr->heap, duk__obj, duk__proto); \ DUK_HOBJECT_INCREF_ALLOWNULL(duk__thr, duk__proto); \ } while (0) /* * Finalizer check */ #if defined(DUK_USE_HEAPPTR16) #define DUK_HOBJECT_HAS_FINALIZER_FAST(heap,h) duk_hobject_has_finalizer_fast_raw((heap), (h)) #else #define DUK_HOBJECT_HAS_FINALIZER_FAST(heap,h) duk_hobject_has_finalizer_fast_raw((h)) #endif /* * Resizing and hash behavior */ /* Sanity limit on max number of properties (allocated, not necessarily used). * This is somewhat arbitrary, but if we're close to 2**32 properties some * algorithms will fail (e.g. hash size selection, next prime selection). * Also, we use negative array/entry table indices to indicate 'not found', * so anything above 0x80000000 will cause trouble now. */ #if defined(DUK_USE_OBJSIZES16) #define DUK_HOBJECT_MAX_PROPERTIES 0x0000ffffUL #else #define DUK_HOBJECT_MAX_PROPERTIES 0x3fffffffUL /* 2**30-1 ~= 1G properties */ #endif /* internal align target for props allocation, must be 2*n for some n */ #if (DUK_USE_ALIGN_BY == 4) #define DUK_HOBJECT_ALIGN_TARGET 4 #elif (DUK_USE_ALIGN_BY == 8) #define DUK_HOBJECT_ALIGN_TARGET 8 #elif (DUK_USE_ALIGN_BY == 1) #define DUK_HOBJECT_ALIGN_TARGET 1 #else #error invalid DUK_USE_ALIGN_BY #endif /* * PC-to-line constants */ #define DUK_PC2LINE_SKIP 64 /* maximum length for a SKIP-1 diffstream: 35 bits per entry, rounded up to bytes */ #define DUK_PC2LINE_MAX_DIFF_LENGTH (((DUK_PC2LINE_SKIP - 1) * 35 + 7) / 8) /* * Struct defs */ struct duk_propaccessor { duk_hobject *get; duk_hobject *set; }; union duk_propvalue { /* The get/set pointers could be 16-bit pointer compressed but it * would make no difference on 32-bit platforms because duk_tval is * 8 bytes or more anyway. */ duk_tval v; duk_propaccessor a; }; struct duk_propdesc { /* read-only values 'lifted' for ease of use */ duk_small_uint_t flags; duk_hobject *get; duk_hobject *set; /* for updating (all are set to < 0 for virtual properties) */ duk_int_t e_idx; /* prop index in 'entry part', < 0 if not there */ duk_int_t h_idx; /* prop index in 'hash part', < 0 if not there */ duk_int_t a_idx; /* prop index in 'array part', < 0 if not there */ }; struct duk_hobject { duk_heaphdr hdr; /* * 'props' contains {key,value,flags} entries, optional array entries, and * an optional hash lookup table for non-array entries in a single 'sliced' * allocation. There are several layout options, which differ slightly in * generated code size/speed and alignment/padding; duk_features.h selects * the layout used. * * Layout 1 (DUK_USE_HOBJECT_LAYOUT_1): * * e_size * sizeof(duk_hstring *) bytes of entry keys (e_next gc reachable) * e_size * sizeof(duk_propvalue) bytes of entry values (e_next gc reachable) * e_size * sizeof(duk_uint8_t) bytes of entry flags (e_next gc reachable) * a_size * sizeof(duk_tval) bytes of (opt) array values (plain only) (all gc reachable) * h_size * sizeof(duk_uint32_t) bytes of (opt) hash indexes to entries (e_size), * 0xffffffffUL = unused, 0xfffffffeUL = deleted * * Layout 2 (DUK_USE_HOBJECT_LAYOUT_2): * * e_size * sizeof(duk_propvalue) bytes of entry values (e_next gc reachable) * e_size * sizeof(duk_hstring *) bytes of entry keys (e_next gc reachable) * e_size * sizeof(duk_uint8_t) + pad bytes of entry flags (e_next gc reachable) * a_size * sizeof(duk_tval) bytes of (opt) array values (plain only) (all gc reachable) * h_size * sizeof(duk_uint32_t) bytes of (opt) hash indexes to entries (e_size), * 0xffffffffUL = unused, 0xfffffffeUL = deleted * * Layout 3 (DUK_USE_HOBJECT_LAYOUT_3): * * e_size * sizeof(duk_propvalue) bytes of entry values (e_next gc reachable) * a_size * sizeof(duk_tval) bytes of (opt) array values (plain only) (all gc reachable) * e_size * sizeof(duk_hstring *) bytes of entry keys (e_next gc reachable) * h_size * sizeof(duk_uint32_t) bytes of (opt) hash indexes to entries (e_size), * 0xffffffffUL = unused, 0xfffffffeUL = deleted * e_size * sizeof(duk_uint8_t) bytes of entry flags (e_next gc reachable) * * In layout 1, the 'e_next' count is rounded to 4 or 8 on platforms * requiring 4 or 8 byte alignment. This ensures proper alignment * for the entries, at the cost of memory footprint. However, it's * probably preferable to use another layout on such platforms instead. * * In layout 2, the key and value parts are swapped to avoid padding * the key array on platforms requiring alignment by 8. The flags part * is padded to get alignment for array entries. The 'e_next' count does * not need to be rounded as in layout 1. * * In layout 3, entry values and array values are always aligned properly, * and assuming pointers are at most 8 bytes, so are the entry keys. Hash * indices will be properly aligned (assuming pointers are at least 4 bytes). * Finally, flags don't need additional alignment. This layout provides * compact allocations without padding (even on platforms with alignment * requirements) at the cost of a bit slower lookups. * * Objects with few keys don't have a hash index; keys are looked up linearly, * which is cache efficient because the keys are consecutive. Larger objects * have a hash index part which contains integer indexes to the entries part. * * A single allocation reduces memory allocation overhead but requires more * work when any part needs to be resized. A sliced allocation for entries * makes linear key matching faster on most platforms (more locality) and * skimps on flags size (which would be followed by 3 bytes of padding in * most architectures if entries were placed in a struct). * * 'props' also contains internal properties distinguished with a non-BMP * prefix. Often used properties should be placed early in 'props' whenever * possible to make accessing them as fast a possible. */ #if defined(DUK_USE_HEAPPTR16) /* Located in duk_heaphdr h_extra16. Subclasses of duk_hobject (like * duk_hcompfunc) are not free to use h_extra16 for this reason. */ #else duk_uint8_t *props; #endif /* prototype: the only internal property lifted outside 'e' as it is so central */ #if defined(DUK_USE_HEAPPTR16) duk_uint16_t prototype16; #else duk_hobject *prototype; #endif #if defined(DUK_USE_OBJSIZES16) duk_uint16_t e_size16; duk_uint16_t e_next16; duk_uint16_t a_size16; #if defined(DUK_USE_HOBJECT_HASH_PART) duk_uint16_t h_size16; #endif #else duk_uint32_t e_size; /* entry part size */ duk_uint32_t e_next; /* index for next new key ([0,e_next[ are gc reachable) */ duk_uint32_t a_size; /* array part size (entirely gc reachable) */ #if defined(DUK_USE_HOBJECT_HASH_PART) duk_uint32_t h_size; /* hash part size or 0 if unused */ #endif #endif }; /* * Exposed data */ #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL duk_uint8_t duk_class_number_to_stridx[32]; #endif /* !DUK_SINGLE_FILE */ /* * Prototypes */ /* alloc and init */ DUK_INTERNAL_DECL duk_hobject *duk_hobject_alloc_unchecked(duk_heap *heap, duk_uint_t hobject_flags); DUK_INTERNAL_DECL duk_hobject *duk_hobject_alloc(duk_hthread *thr, duk_uint_t hobject_flags); DUK_INTERNAL_DECL duk_harray *duk_harray_alloc(duk_hthread *thr, duk_uint_t hobject_flags); DUK_INTERNAL_DECL duk_hcompfunc *duk_hcompfunc_alloc(duk_hthread *thr, duk_uint_t hobject_flags); DUK_INTERNAL_DECL duk_hnatfunc *duk_hnatfunc_alloc(duk_hthread *thr, duk_uint_t hobject_flags); DUK_INTERNAL_DECL duk_hboundfunc *duk_hboundfunc_alloc(duk_heap *heap, duk_uint_t hobject_flags); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL_DECL duk_hbufobj *duk_hbufobj_alloc(duk_hthread *thr, duk_uint_t hobject_flags); #endif DUK_INTERNAL_DECL duk_hthread *duk_hthread_alloc_unchecked(duk_heap *heap, duk_uint_t hobject_flags); DUK_INTERNAL_DECL duk_hthread *duk_hthread_alloc(duk_hthread *thr, duk_uint_t hobject_flags); DUK_INTERNAL_DECL duk_hdecenv *duk_hdecenv_alloc(duk_hthread *thr, duk_uint_t hobject_flags); DUK_INTERNAL_DECL duk_hobjenv *duk_hobjenv_alloc(duk_hthread *thr, duk_uint_t hobject_flags); DUK_INTERNAL_DECL duk_hproxy *duk_hproxy_alloc(duk_hthread *thr, duk_uint_t hobject_flags); /* resize */ DUK_INTERNAL_DECL void duk_hobject_realloc_props(duk_hthread *thr, duk_hobject *obj, duk_uint32_t new_e_size, duk_uint32_t new_a_size, duk_uint32_t new_h_size, duk_bool_t abandon_array); DUK_INTERNAL_DECL void duk_hobject_resize_entrypart(duk_hthread *thr, duk_hobject *obj, duk_uint32_t new_e_size); #if 0 /*unused*/ DUK_INTERNAL_DECL void duk_hobject_resize_arraypart(duk_hthread *thr, duk_hobject *obj, duk_uint32_t new_a_size); #endif /* low-level property functions */ DUK_INTERNAL_DECL duk_bool_t duk_hobject_find_entry(duk_heap *heap, duk_hobject *obj, duk_hstring *key, duk_int_t *e_idx, duk_int_t *h_idx); DUK_INTERNAL_DECL duk_tval *duk_hobject_find_entry_tval_ptr(duk_heap *heap, duk_hobject *obj, duk_hstring *key); DUK_INTERNAL_DECL duk_tval *duk_hobject_find_entry_tval_ptr_stridx(duk_heap *heap, duk_hobject *obj, duk_small_uint_t stridx); DUK_INTERNAL_DECL duk_tval *duk_hobject_find_entry_tval_ptr_and_attrs(duk_heap *heap, duk_hobject *obj, duk_hstring *key, duk_uint_t *out_attrs); DUK_INTERNAL_DECL duk_tval *duk_hobject_find_array_entry_tval_ptr(duk_heap *heap, duk_hobject *obj, duk_uarridx_t i); DUK_INTERNAL_DECL duk_bool_t duk_hobject_get_own_propdesc(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *out_desc, duk_small_uint_t flags); /* core property functions */ DUK_INTERNAL_DECL duk_bool_t duk_hobject_getprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key); DUK_INTERNAL_DECL duk_bool_t duk_hobject_putprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key, duk_tval *tv_val, duk_bool_t throw_flag); DUK_INTERNAL_DECL duk_bool_t duk_hobject_delprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key, duk_bool_t throw_flag); DUK_INTERNAL_DECL duk_bool_t duk_hobject_hasprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key); /* internal property functions */ #define DUK_DELPROP_FLAG_THROW (1U << 0) #define DUK_DELPROP_FLAG_FORCE (1U << 1) DUK_INTERNAL_DECL duk_bool_t duk_hobject_delprop_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_small_uint_t flags); DUK_INTERNAL_DECL duk_bool_t duk_hobject_hasprop_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key); DUK_INTERNAL_DECL void duk_hobject_define_property_internal(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_small_uint_t flags); DUK_INTERNAL_DECL void duk_hobject_define_property_internal_arridx(duk_hthread *thr, duk_hobject *obj, duk_uarridx_t arr_idx, duk_small_uint_t flags); DUK_INTERNAL_DECL duk_size_t duk_hobject_get_length(duk_hthread *thr, duk_hobject *obj); #if defined(DUK_USE_HEAPPTR16) DUK_INTERNAL_DECL duk_bool_t duk_hobject_has_finalizer_fast_raw(duk_heap *heap, duk_hobject *obj); #else DUK_INTERNAL_DECL duk_bool_t duk_hobject_has_finalizer_fast_raw(duk_hobject *obj); #endif /* helpers for defineProperty() and defineProperties() */ DUK_INTERNAL_DECL void duk_hobject_prepare_property_descriptor(duk_hthread *thr, duk_idx_t idx_in, duk_uint_t *out_defprop_flags, duk_idx_t *out_idx_value, duk_hobject **out_getter, duk_hobject **out_setter); DUK_INTERNAL_DECL duk_bool_t duk_hobject_define_property_helper(duk_hthread *thr, duk_uint_t defprop_flags, duk_hobject *obj, duk_hstring *key, duk_idx_t idx_value, duk_hobject *get, duk_hobject *set, duk_bool_t throw_flag); /* Object built-in methods */ DUK_INTERNAL_DECL void duk_hobject_object_get_own_property_descriptor(duk_hthread *thr, duk_idx_t obj_idx); DUK_INTERNAL_DECL void duk_hobject_object_seal_freeze_helper(duk_hthread *thr, duk_hobject *obj, duk_bool_t is_freeze); DUK_INTERNAL_DECL duk_bool_t duk_hobject_object_is_sealed_frozen_helper(duk_hthread *thr, duk_hobject *obj, duk_bool_t is_frozen); DUK_INTERNAL_DECL duk_bool_t duk_hobject_object_ownprop_helper(duk_hthread *thr, duk_small_uint_t required_desc_flags); /* internal properties */ DUK_INTERNAL_DECL duk_tval *duk_hobject_get_internal_value_tval_ptr(duk_heap *heap, duk_hobject *obj); DUK_INTERNAL_DECL duk_hstring *duk_hobject_get_internal_value_string(duk_heap *heap, duk_hobject *obj); DUK_INTERNAL_DECL duk_harray *duk_hobject_get_formals(duk_hthread *thr, duk_hobject *obj); DUK_INTERNAL_DECL duk_hobject *duk_hobject_get_varmap(duk_hthread *thr, duk_hobject *obj); /* hobject management functions */ DUK_INTERNAL_DECL void duk_hobject_compact_props(duk_hthread *thr, duk_hobject *obj); /* ES2015 proxy */ #if defined(DUK_USE_ES6_PROXY) DUK_INTERNAL_DECL duk_bool_t duk_hobject_proxy_check(duk_hobject *obj, duk_hobject **out_target, duk_hobject **out_handler); DUK_INTERNAL_DECL duk_hobject *duk_hobject_resolve_proxy_target(duk_hobject *obj); #endif /* enumeration */ DUK_INTERNAL_DECL void duk_hobject_enumerator_create(duk_hthread *thr, duk_small_uint_t enum_flags); DUK_INTERNAL_DECL duk_ret_t duk_hobject_get_enumerated_keys(duk_hthread *thr, duk_small_uint_t enum_flags); DUK_INTERNAL_DECL duk_bool_t duk_hobject_enumerator_next(duk_hthread *thr, duk_bool_t get_value); /* macros */ DUK_INTERNAL_DECL void duk_hobject_set_prototype_updref(duk_hthread *thr, duk_hobject *h, duk_hobject *p); /* pc2line */ #if defined(DUK_USE_PC2LINE) DUK_INTERNAL_DECL void duk_hobject_pc2line_pack(duk_hthread *thr, duk_compiler_instr *instrs, duk_uint_fast32_t length); DUK_INTERNAL_DECL duk_uint_fast32_t duk_hobject_pc2line_query(duk_hthread *thr, duk_idx_t idx_func, duk_uint_fast32_t pc); #endif /* misc */ DUK_INTERNAL_DECL duk_bool_t duk_hobject_prototype_chain_contains(duk_hthread *thr, duk_hobject *h, duk_hobject *p, duk_bool_t ignore_loop); #if !defined(DUK_USE_OBJECT_BUILTIN) /* These declarations are needed when related built-in is disabled and * genbuiltins.py won't automatically emit the declerations. */ DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_to_string(duk_hthread *thr); DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype(duk_hthread *thr); #endif #endif /* DUK_HOBJECT_H_INCLUDED */ /* #include duk_hcompfunc.h */ /* * Heap compiled function (ECMAScript function) representation. * * There is a single data buffer containing the ECMAScript function's * bytecode, constants, and inner functions. */ #if !defined(DUK_HCOMPFUNC_H_INCLUDED) #define DUK_HCOMPFUNC_H_INCLUDED /* * Field accessor macros */ /* XXX: casts could be improved, especially for GET/SET DATA */ #if defined(DUK_USE_HEAPPTR16) #define DUK_HCOMPFUNC_GET_DATA(heap,h) \ ((duk_hbuffer_fixed *) (void *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->data16)) #define DUK_HCOMPFUNC_SET_DATA(heap,h,v) do { \ (h)->data16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \ } while (0) #define DUK_HCOMPFUNC_GET_FUNCS(heap,h) \ ((duk_hobject **) (void *) (DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->funcs16))) #define DUK_HCOMPFUNC_SET_FUNCS(heap,h,v) do { \ (h)->funcs16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \ } while (0) #define DUK_HCOMPFUNC_GET_BYTECODE(heap,h) \ ((duk_instr_t *) (void *) (DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->bytecode16))) #define DUK_HCOMPFUNC_SET_BYTECODE(heap,h,v) do { \ (h)->bytecode16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \ } while (0) #define DUK_HCOMPFUNC_GET_LEXENV(heap,h) \ ((duk_hobject *) (void *) (DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->lex_env16))) #define DUK_HCOMPFUNC_SET_LEXENV(heap,h,v) do { \ (h)->lex_env16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \ } while (0) #define DUK_HCOMPFUNC_GET_VARENV(heap,h) \ ((duk_hobject *) (void *) (DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->var_env16))) #define DUK_HCOMPFUNC_SET_VARENV(heap,h,v) do { \ (h)->var_env16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \ } while (0) #else #define DUK_HCOMPFUNC_GET_DATA(heap,h) ((duk_hbuffer_fixed *) (void *) (h)->data) #define DUK_HCOMPFUNC_SET_DATA(heap,h,v) do { \ (h)->data = (duk_hbuffer *) (v); \ } while (0) #define DUK_HCOMPFUNC_GET_FUNCS(heap,h) ((h)->funcs) #define DUK_HCOMPFUNC_SET_FUNCS(heap,h,v) do { \ (h)->funcs = (v); \ } while (0) #define DUK_HCOMPFUNC_GET_BYTECODE(heap,h) ((h)->bytecode) #define DUK_HCOMPFUNC_SET_BYTECODE(heap,h,v) do { \ (h)->bytecode = (v); \ } while (0) #define DUK_HCOMPFUNC_GET_LEXENV(heap,h) ((h)->lex_env) #define DUK_HCOMPFUNC_SET_LEXENV(heap,h,v) do { \ (h)->lex_env = (v); \ } while (0) #define DUK_HCOMPFUNC_GET_VARENV(heap,h) ((h)->var_env) #define DUK_HCOMPFUNC_SET_VARENV(heap,h,v) do { \ (h)->var_env = (v); \ } while (0) #endif /* * Accessor macros for function specific data areas */ /* Note: assumes 'data' is always a fixed buffer */ #define DUK_HCOMPFUNC_GET_BUFFER_BASE(heap,h) \ DUK_HBUFFER_FIXED_GET_DATA_PTR((heap), DUK_HCOMPFUNC_GET_DATA((heap), (h))) #define DUK_HCOMPFUNC_GET_CONSTS_BASE(heap,h) \ ((duk_tval *) (void *) DUK_HCOMPFUNC_GET_BUFFER_BASE((heap), (h))) #define DUK_HCOMPFUNC_GET_FUNCS_BASE(heap,h) \ DUK_HCOMPFUNC_GET_FUNCS((heap), (h)) #define DUK_HCOMPFUNC_GET_CODE_BASE(heap,h) \ DUK_HCOMPFUNC_GET_BYTECODE((heap), (h)) #define DUK_HCOMPFUNC_GET_CONSTS_END(heap,h) \ ((duk_tval *) (void *) DUK_HCOMPFUNC_GET_FUNCS((heap), (h))) #define DUK_HCOMPFUNC_GET_FUNCS_END(heap,h) \ ((duk_hobject **) (void *) DUK_HCOMPFUNC_GET_BYTECODE((heap), (h))) /* XXX: double evaluation of DUK_HCOMPFUNC_GET_DATA() */ #define DUK_HCOMPFUNC_GET_CODE_END(heap,h) \ ((duk_instr_t *) (void *) (DUK_HBUFFER_FIXED_GET_DATA_PTR((heap), DUK_HCOMPFUNC_GET_DATA((heap), (h))) + \ DUK_HBUFFER_GET_SIZE((duk_hbuffer *) DUK_HCOMPFUNC_GET_DATA((heap), h)))) #define DUK_HCOMPFUNC_GET_CONSTS_SIZE(heap,h) \ ( \ (duk_size_t) \ ( \ ((const duk_uint8_t *) DUK_HCOMPFUNC_GET_CONSTS_END((heap), (h))) - \ ((const duk_uint8_t *) DUK_HCOMPFUNC_GET_CONSTS_BASE((heap), (h))) \ ) \ ) #define DUK_HCOMPFUNC_GET_FUNCS_SIZE(heap,h) \ ( \ (duk_size_t) \ ( \ ((const duk_uint8_t *) DUK_HCOMPFUNC_GET_FUNCS_END((heap), (h))) - \ ((const duk_uint8_t *) DUK_HCOMPFUNC_GET_FUNCS_BASE((heap), (h))) \ ) \ ) #define DUK_HCOMPFUNC_GET_CODE_SIZE(heap,h) \ ( \ (duk_size_t) \ ( \ ((const duk_uint8_t *) DUK_HCOMPFUNC_GET_CODE_END((heap),(h))) - \ ((const duk_uint8_t *) DUK_HCOMPFUNC_GET_CODE_BASE((heap),(h))) \ ) \ ) #define DUK_HCOMPFUNC_GET_CONSTS_COUNT(heap,h) \ ((duk_size_t) (DUK_HCOMPFUNC_GET_CONSTS_SIZE((heap), (h)) / sizeof(duk_tval))) #define DUK_HCOMPFUNC_GET_FUNCS_COUNT(heap,h) \ ((duk_size_t) (DUK_HCOMPFUNC_GET_FUNCS_SIZE((heap), (h)) / sizeof(duk_hobject *))) #define DUK_HCOMPFUNC_GET_CODE_COUNT(heap,h) \ ((duk_size_t) (DUK_HCOMPFUNC_GET_CODE_SIZE((heap), (h)) / sizeof(duk_instr_t))) /* * Validity assert */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_hcompfunc_assert_valid(duk_hcompfunc *h); #define DUK_HCOMPFUNC_ASSERT_VALID(h) do { duk_hcompfunc_assert_valid((h)); } while (0) #else #define DUK_HCOMPFUNC_ASSERT_VALID(h) do {} while (0) #endif /* * Main struct */ struct duk_hcompfunc { /* shared object part */ duk_hobject obj; /* * Pointers to function data area for faster access. Function * data is a buffer shared between all closures of the same * "template" function. The data buffer is always fixed (non- * dynamic, hence stable), with a layout as follows: * * constants (duk_tval) * inner functions (duk_hobject *) * bytecode (duk_instr_t) * * Note: bytecode end address can be computed from 'data' buffer * size. It is not strictly necessary functionally, assuming * bytecode never jumps outside its allocated area. However, * it's a safety/robustness feature for avoiding the chance of * executing random data as bytecode due to a compiler error. * * Note: values in the data buffer must be incref'd (they will * be decref'd on release) for every compiledfunction referring * to the 'data' element. */ /* Data area, fixed allocation, stable data ptrs. */ #if defined(DUK_USE_HEAPPTR16) duk_uint16_t data16; #else duk_hbuffer *data; #endif /* No need for constants pointer (= same as data). * * When using 16-bit packing alignment to 4 is nice. 'funcs' will be * 4-byte aligned because 'constants' are duk_tvals. For now the * inner function pointers are not compressed, so that 'bytecode' will * also be 4-byte aligned. */ #if defined(DUK_USE_HEAPPTR16) duk_uint16_t funcs16; duk_uint16_t bytecode16; #else duk_hobject **funcs; duk_instr_t *bytecode; #endif /* Lexenv: lexical environment of closure, NULL for templates. * Varenv: variable environment of closure, NULL for templates. */ #if defined(DUK_USE_HEAPPTR16) duk_uint16_t lex_env16; duk_uint16_t var_env16; #else duk_hobject *lex_env; duk_hobject *var_env; #endif /* * 'nregs' registers are allocated on function entry, at most 'nargs' * are initialized to arguments, and the rest to undefined. Arguments * above 'nregs' are not mapped to registers. All registers in the * active stack range must be initialized because they are GC reachable. * 'nargs' is needed so that if the function is given more than 'nargs' * arguments, the additional arguments do not 'clobber' registers * beyond 'nregs' which must be consistently initialized to undefined. * * Usually there is no need to know which registers are mapped to * local variables. Registers may be allocated to variable in any * way (even including gaps). However, a register-variable mapping * must be the same for the duration of the function execution and * the register cannot be used for anything else. * * When looking up variables by name, the '_Varmap' map is used. * When an activation closes, registers mapped to arguments are * copied into the environment record based on the same map. The * reverse map (from register to variable) is not currently needed * at run time, except for debugging, so it is not maintained. */ duk_uint16_t nregs; /* regs to allocate */ duk_uint16_t nargs; /* number of arguments allocated to regs */ /* * Additional control information is placed into the object itself * as internal properties to avoid unnecessary fields for the * majority of functions. The compiler tries to omit internal * control fields when possible. * * Function templates: * * { * name: "func", // declaration, named function expressions * fileName: * _Varmap: { "arg1": 0, "arg2": 1, "varname": 2 }, * _Formals: [ "arg1", "arg2" ], * _Source: "function func(arg1, arg2) { ... }", * _Pc2line: , * } * * Function instances: * * { * length: 2, * prototype: { constructor: }, * caller: , * arguments: , * name: "func", // declaration, named function expressions * fileName: * _Varmap: { "arg1": 0, "arg2": 1, "varname": 2 }, * _Formals: [ "arg1", "arg2" ], * _Source: "function func(arg1, arg2) { ... }", * _Pc2line: , * } * * More detailed description of these properties can be found * in the documentation. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) /* Line number range for function. Needed during debugging to * determine active breakpoints. */ duk_uint32_t start_line; duk_uint32_t end_line; #endif }; #endif /* DUK_HCOMPFUNC_H_INCLUDED */ /* #include duk_hnatfunc.h */ /* * Heap native function representation. */ #if !defined(DUK_HNATFUNC_H_INCLUDED) #define DUK_HNATFUNC_H_INCLUDED #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_hnatfunc_assert_valid(duk_hnatfunc *h); #define DUK_HNATFUNC_ASSERT_VALID(h) do { duk_hnatfunc_assert_valid((h)); } while (0) #else #define DUK_HNATFUNC_ASSERT_VALID(h) do {} while (0) #endif #define DUK_HNATFUNC_NARGS_VARARGS ((duk_int16_t) -1) #define DUK_HNATFUNC_NARGS_MAX ((duk_int16_t) 0x7fff) struct duk_hnatfunc { /* shared object part */ duk_hobject obj; duk_c_function func; duk_int16_t nargs; duk_int16_t magic; /* The 'magic' field allows an opaque 16-bit field to be accessed by the * Duktape/C function. This allows, for instance, the same native function * to be used for a set of very similar functions, with the 'magic' field * providing the necessary non-argument flags / values to guide the behavior * of the native function. The value is signed on purpose: it is easier to * convert a signed value to unsigned (simply AND with 0xffff) than vice * versa. * * Note: cannot place nargs/magic into the heaphdr flags, because * duk_hobject takes almost all flags already. */ }; #endif /* DUK_HNATFUNC_H_INCLUDED */ /* #include duk_hboundfunc.h */ /* * Bound function representation. */ #if !defined(DUK_HBOUNDFUNC_H_INCLUDED) #define DUK_HBOUNDFUNC_H_INCLUDED /* Artificial limit for args length. Ensures arithmetic won't overflow * 32 bits when combining bound functions. */ #define DUK_HBOUNDFUNC_MAX_ARGS 0x20000000UL #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_hboundfunc_assert_valid(duk_hboundfunc *h); #define DUK_HBOUNDFUNC_ASSERT_VALID(h) do { duk_hboundfunc_assert_valid((h)); } while (0) #else #define DUK_HBOUNDFUNC_ASSERT_VALID(h) do {} while (0) #endif struct duk_hboundfunc { /* Shared object part. */ duk_hobject obj; /* Final target function, stored as duk_tval so that lightfunc can be * represented too. */ duk_tval target; /* This binding. */ duk_tval this_binding; /* Arguments to prepend. */ duk_tval *args; /* Separate allocation. */ duk_idx_t nargs; }; #endif /* DUK_HBOUNDFUNC_H_INCLUDED */ /* #include duk_hbufobj.h */ /* * Heap Buffer object representation. Used for all Buffer variants. */ #if !defined(DUK_HBUFOBJ_H_INCLUDED) #define DUK_HBUFOBJ_H_INCLUDED #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) /* All element accessors are host endian now (driven by TypedArray spec). */ #define DUK_HBUFOBJ_ELEM_UINT8 0 #define DUK_HBUFOBJ_ELEM_UINT8CLAMPED 1 #define DUK_HBUFOBJ_ELEM_INT8 2 #define DUK_HBUFOBJ_ELEM_UINT16 3 #define DUK_HBUFOBJ_ELEM_INT16 4 #define DUK_HBUFOBJ_ELEM_UINT32 5 #define DUK_HBUFOBJ_ELEM_INT32 6 #define DUK_HBUFOBJ_ELEM_FLOAT32 7 #define DUK_HBUFOBJ_ELEM_FLOAT64 8 #define DUK_HBUFOBJ_ELEM_MAX 8 #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_hbufobj_assert_valid(duk_hbufobj *h); #define DUK_HBUFOBJ_ASSERT_VALID(h) do { duk_hbufobj_assert_valid((h)); } while (0) #else #define DUK_HBUFOBJ_ASSERT_VALID(h) do {} while (0) #endif /* Get the current data pointer (caller must ensure buf != NULL) as a * duk_uint8_t ptr. Note that the result may be NULL if the underlying * buffer has zero size and is not a fixed buffer. */ #define DUK_HBUFOBJ_GET_SLICE_BASE(heap,h) \ (DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \ (((duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR((heap), (h)->buf)) + (h)->offset)) /* True if slice is full, i.e. offset is zero and length covers the entire * buffer. This status may change independently of the duk_hbufobj if * the underlying buffer is dynamic and changes without the hbufobj * being changed. */ #define DUK_HBUFOBJ_FULL_SLICE(h) \ (DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \ ((h)->offset == 0 && (h)->length == DUK_HBUFFER_GET_SIZE((h)->buf))) /* Validate that the whole slice [0,length[ is contained in the underlying * buffer. Caller must ensure 'buf' != NULL. */ #define DUK_HBUFOBJ_VALID_SLICE(h) \ (DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \ ((h)->offset + (h)->length <= DUK_HBUFFER_GET_SIZE((h)->buf))) /* Validate byte read/write for virtual 'offset', i.e. check that the * offset, taking into account h->offset, is within the underlying * buffer size. This is a safety check which is needed to ensure * that even a misconfigured duk_hbufobj never causes memory unsafe * behavior (e.g. if an underlying dynamic buffer changes after being * setup). Caller must ensure 'buf' != NULL. */ #define DUK_HBUFOBJ_VALID_BYTEOFFSET_INCL(h,off) \ (DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \ ((h)->offset + (off) < DUK_HBUFFER_GET_SIZE((h)->buf))) #define DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h,off) \ (DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \ ((h)->offset + (off) <= DUK_HBUFFER_GET_SIZE((h)->buf))) /* Clamp an input byte length (already assumed to be within the nominal * duk_hbufobj 'length') to the current dynamic buffer limits to yield * a byte length limit that's safe for memory accesses. This value can * be invalidated by any side effect because it may trigger a user * callback that resizes the underlying buffer. */ #define DUK_HBUFOBJ_CLAMP_BYTELENGTH(h,len) \ (DUK_ASSERT_EXPR((h) != NULL), \ duk_hbufobj_clamp_bytelength((h), (len))) /* Typed arrays have virtual indices, ArrayBuffer and DataView do not. */ #define DUK_HBUFOBJ_HAS_VIRTUAL_INDICES(h) ((h)->is_typedarray) struct duk_hbufobj { /* Shared object part. */ duk_hobject obj; /* Underlying buffer (refcounted), may be NULL. */ duk_hbuffer *buf; /* .buffer reference to an ArrayBuffer, may be NULL. */ duk_hobject *buf_prop; /* Slice and accessor information. * * Because the underlying buffer may be dynamic, these may be * invalidated by the buffer being modified so that both offset * and length should be validated before every access. Behavior * when the underlying buffer has changed doesn't need to be clean: * virtual 'length' doesn't need to be affected, reads can return * zero/NaN, and writes can be ignored. * * Note that a data pointer cannot be precomputed because 'buf' may * be dynamic and its pointer unstable. */ duk_uint_t offset; /* byte offset to buf */ duk_uint_t length; /* byte index limit for element access, exclusive */ duk_uint8_t shift; /* element size shift: * 0 = u8/i8 * 1 = u16/i16 * 2 = u32/i32/float * 3 = double */ duk_uint8_t elem_type; /* element type */ duk_uint8_t is_typedarray; }; DUK_INTERNAL_DECL duk_uint_t duk_hbufobj_clamp_bytelength(duk_hbufobj *h_bufobj, duk_uint_t len); DUK_INTERNAL_DECL void duk_hbufobj_push_uint8array_from_plain(duk_hthread *thr, duk_hbuffer *h_buf); DUK_INTERNAL_DECL void duk_hbufobj_push_validated_read(duk_hthread *thr, duk_hbufobj *h_bufobj, duk_uint8_t *p, duk_small_uint_t elem_size); DUK_INTERNAL_DECL void duk_hbufobj_validated_write(duk_hthread *thr, duk_hbufobj *h_bufobj, duk_uint8_t *p, duk_small_uint_t elem_size); DUK_INTERNAL_DECL void duk_hbufobj_promote_plain(duk_hthread *thr, duk_idx_t idx); #else /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* nothing */ #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ #endif /* DUK_HBUFOBJ_H_INCLUDED */ /* #include duk_hthread.h */ /* * Heap thread object representation. * * duk_hthread is also the 'context' for public API functions via a * different typedef. Most API calls operate on the topmost frame * of the value stack only. */ #if !defined(DUK_HTHREAD_H_INCLUDED) #define DUK_HTHREAD_H_INCLUDED /* * Stack constants */ /* Initial valstack size, roughly 0.7kiB. */ #define DUK_VALSTACK_INITIAL_SIZE 96U /* Internal extra elements assumed on function entry, always added to * user-defined 'extra' for e.g. the duk_check_stack() call. */ #define DUK_VALSTACK_INTERNAL_EXTRA 32U /* Number of elements guaranteed to be user accessible (in addition to call * arguments) on Duktape/C function entry. This is the major public API * commitment. */ #define DUK_VALSTACK_API_ENTRY_MINIMUM DUK_API_ENTRY_STACK /* * Activation defines */ #define DUK_ACT_FLAG_STRICT (1U << 0) /* function executes in strict mode */ #define DUK_ACT_FLAG_TAILCALLED (1U << 1) /* activation has tail called one or more times */ #define DUK_ACT_FLAG_CONSTRUCT (1U << 2) /* function executes as a constructor (called via "new") */ #define DUK_ACT_FLAG_PREVENT_YIELD (1U << 3) /* activation prevents yield (native call or "new") */ #define DUK_ACT_FLAG_DIRECT_EVAL (1U << 4) /* activation is a direct eval call */ #define DUK_ACT_FLAG_CONSTRUCT_PROXY (1U << 5) /* activation is for Proxy 'construct' call, special return value handling */ #define DUK_ACT_FLAG_BREAKPOINT_ACTIVE (1U << 6) /* activation has active breakpoint(s) */ #define DUK_ACT_GET_FUNC(act) ((act)->func) /* * Flags for __FILE__ / __LINE__ registered into tracedata */ #define DUK_TB_FLAG_NOBLAME_FILELINE (1U << 0) /* don't report __FILE__ / __LINE__ as fileName/lineNumber */ /* * Catcher defines */ /* XXX: remove catcher type entirely */ /* flags field: LLLLLLFT, L = label (24 bits), F = flags (4 bits), T = type (4 bits) */ #define DUK_CAT_TYPE_MASK 0x0000000fUL #define DUK_CAT_TYPE_BITS 4 #define DUK_CAT_LABEL_MASK 0xffffff00UL #define DUK_CAT_LABEL_BITS 24 #define DUK_CAT_LABEL_SHIFT 8 #define DUK_CAT_FLAG_CATCH_ENABLED (1U << 4) /* catch part will catch */ #define DUK_CAT_FLAG_FINALLY_ENABLED (1U << 5) /* finally part will catch */ #define DUK_CAT_FLAG_CATCH_BINDING_ENABLED (1U << 6) /* request to create catch binding */ #define DUK_CAT_FLAG_LEXENV_ACTIVE (1U << 7) /* catch or with binding is currently active */ #define DUK_CAT_TYPE_UNKNOWN 0 #define DUK_CAT_TYPE_TCF 1 #define DUK_CAT_TYPE_LABEL 2 #define DUK_CAT_GET_TYPE(c) ((c)->flags & DUK_CAT_TYPE_MASK) #define DUK_CAT_GET_LABEL(c) (((c)->flags & DUK_CAT_LABEL_MASK) >> DUK_CAT_LABEL_SHIFT) #define DUK_CAT_HAS_CATCH_ENABLED(c) ((c)->flags & DUK_CAT_FLAG_CATCH_ENABLED) #define DUK_CAT_HAS_FINALLY_ENABLED(c) ((c)->flags & DUK_CAT_FLAG_FINALLY_ENABLED) #define DUK_CAT_HAS_CATCH_BINDING_ENABLED(c) ((c)->flags & DUK_CAT_FLAG_CATCH_BINDING_ENABLED) #define DUK_CAT_HAS_LEXENV_ACTIVE(c) ((c)->flags & DUK_CAT_FLAG_LEXENV_ACTIVE) #define DUK_CAT_SET_CATCH_ENABLED(c) do { \ (c)->flags |= DUK_CAT_FLAG_CATCH_ENABLED; \ } while (0) #define DUK_CAT_SET_FINALLY_ENABLED(c) do { \ (c)->flags |= DUK_CAT_FLAG_FINALLY_ENABLED; \ } while (0) #define DUK_CAT_SET_CATCH_BINDING_ENABLED(c) do { \ (c)->flags |= DUK_CAT_FLAG_CATCH_BINDING_ENABLED; \ } while (0) #define DUK_CAT_SET_LEXENV_ACTIVE(c) do { \ (c)->flags |= DUK_CAT_FLAG_LEXENV_ACTIVE; \ } while (0) #define DUK_CAT_CLEAR_CATCH_ENABLED(c) do { \ (c)->flags &= ~DUK_CAT_FLAG_CATCH_ENABLED; \ } while (0) #define DUK_CAT_CLEAR_FINALLY_ENABLED(c) do { \ (c)->flags &= ~DUK_CAT_FLAG_FINALLY_ENABLED; \ } while (0) #define DUK_CAT_CLEAR_CATCH_BINDING_ENABLED(c) do { \ (c)->flags &= ~DUK_CAT_FLAG_CATCH_BINDING_ENABLED; \ } while (0) #define DUK_CAT_CLEAR_LEXENV_ACTIVE(c) do { \ (c)->flags &= ~DUK_CAT_FLAG_LEXENV_ACTIVE; \ } while (0) /* * Thread defines */ #if defined(DUK_USE_ROM_STRINGS) #define DUK_HTHREAD_GET_STRING(thr,idx) \ ((duk_hstring *) DUK_LOSE_CONST(duk_rom_strings_stridx[(idx)])) #else /* DUK_USE_ROM_STRINGS */ #if defined(DUK_USE_HEAPPTR16) #define DUK_HTHREAD_GET_STRING(thr,idx) \ ((duk_hstring *) DUK_USE_HEAPPTR_DEC16((thr)->heap->heap_udata, (thr)->strs16[(idx)])) #else #define DUK_HTHREAD_GET_STRING(thr,idx) \ ((thr)->strs[(idx)]) #endif #endif /* DUK_USE_ROM_STRINGS */ /* values for the state field */ #define DUK_HTHREAD_STATE_INACTIVE 1 /* thread not currently running */ #define DUK_HTHREAD_STATE_RUNNING 2 /* thread currently running (only one at a time) */ #define DUK_HTHREAD_STATE_RESUMED 3 /* thread resumed another thread (active but not running) */ #define DUK_HTHREAD_STATE_YIELDED 4 /* thread has yielded */ #define DUK_HTHREAD_STATE_TERMINATED 5 /* thread has terminated */ /* Executor interrupt default interval when nothing else requires a * smaller value. The default interval must be small enough to allow * for reasonable execution timeout checking but large enough to keep * impact on execution performance low. */ #if defined(DUK_USE_INTERRUPT_COUNTER) #define DUK_HTHREAD_INTCTR_DEFAULT (256L * 1024L) #endif /* * Assert context is valid: non-NULL pointer, fields look sane. * * This is used by public API call entrypoints to catch invalid 'ctx' pointers * as early as possible; invalid 'ctx' pointers cause very odd and difficult to * diagnose behavior so it's worth checking even when the check is not 100%. */ #if defined(DUK_USE_ASSERTIONS) /* Assertions for internals. */ DUK_INTERNAL_DECL void duk_hthread_assert_valid(duk_hthread *thr); #define DUK_HTHREAD_ASSERT_VALID(thr) do { duk_hthread_assert_valid((thr)); } while (0) /* Assertions for public API calls; a bit stronger. */ DUK_INTERNAL_DECL void duk_ctx_assert_valid(duk_hthread *thr); #define DUK_CTX_ASSERT_VALID(thr) do { duk_ctx_assert_valid((thr)); } while (0) #else #define DUK_HTHREAD_ASSERT_VALID(thr) do {} while (0) #define DUK_CTX_ASSERT_VALID(thr) do {} while (0) #endif /* Assertions for API call entry specifically. Checks 'ctx' but also may * check internal state (e.g. not in a debugger transport callback). */ #define DUK_ASSERT_API_ENTRY(thr) do { \ DUK_CTX_ASSERT_VALID((thr)); \ DUK_ASSERT((thr)->heap != NULL); \ DUK_ASSERT((thr)->heap->dbg_calling_transport == 0); \ } while (0) /* * Assertion helpers. */ #define DUK_ASSERT_STRIDX_VALID(val) \ DUK_ASSERT((duk_uint_t) (val) < DUK_HEAP_NUM_STRINGS) #define DUK_ASSERT_BIDX_VALID(val) \ DUK_ASSERT((duk_uint_t) (val) < DUK_NUM_BUILTINS) /* * Misc */ /* Fast access to 'this' binding. Assumes there's a call in progress. */ #define DUK_HTHREAD_THIS_PTR(thr) \ (DUK_ASSERT_EXPR((thr) != NULL), \ DUK_ASSERT_EXPR((thr)->valstack_bottom > (thr)->valstack), \ (thr)->valstack_bottom - 1) /* * Struct defines */ /* Fields are ordered for alignment/packing. */ struct duk_activation { duk_tval tv_func; /* borrowed: full duk_tval for function being executed; for lightfuncs */ duk_hobject *func; /* borrowed: function being executed; for bound function calls, this is the final, real function, NULL for lightfuncs */ duk_activation *parent; /* previous (parent) activation (or NULL if none) */ duk_hobject *var_env; /* current variable environment (may be NULL if delayed) */ duk_hobject *lex_env; /* current lexical environment (may be NULL if delayed) */ duk_catcher *cat; /* current catcher (or NULL) */ #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) /* Previous value of 'func' caller, restored when unwound. Only in use * when 'func' is non-strict. */ duk_hobject *prev_caller; #endif duk_instr_t *curr_pc; /* next instruction to execute (points to 'func' bytecode, stable pointer), NULL for native calls */ /* bottom_byteoff and retval_byteoff are only used for book-keeping * of ECMAScript-initiated calls, to allow returning to an ECMAScript * function properly. */ /* Bottom of valstack for this activation, used to reset * valstack_bottom on return; offset is absolute. There's * no need to track 'top' because native call handling deals * with that using locals, and for ECMAScript returns 'nregs' * indicates the necessary top. */ duk_size_t bottom_byteoff; /* Return value when returning to this activation (points to caller * reg, not callee reg); offset is absolute (only set if activation is * not topmost). * * Note: bottom_byteoff is always set, while retval_byteoff is only * applicable for activations below the topmost one. Currently * retval_byteoff for the topmost activation is considered garbage * (and it not initialized on entry or cleared on return; may contain * previous or garbage values). */ duk_size_t retval_byteoff; /* Current 'this' binding is the value just below bottom. * Previously, 'this' binding was handled with an index to the * (calling) valstack. This works for everything except tail * calls, which must not "accumulate" valstack temps. */ /* Value stack reserve (valstack_end) byte offset to be restored * when returning to this activation. Only used by the bytecode * executor. */ duk_size_t reserve_byteoff; #if defined(DUK_USE_DEBUGGER_SUPPORT) duk_uint32_t prev_line; /* needed for stepping */ #endif duk_small_uint_t flags; }; struct duk_catcher { duk_catcher *parent; /* previous (parent) catcher (or NULL if none) */ duk_hstring *h_varname; /* borrowed reference to catch variable name (or NULL if none) */ /* (reference is valid as long activation exists) */ duk_instr_t *pc_base; /* resume execution from pc_base or pc_base+1 (points to 'func' bytecode, stable pointer) */ duk_size_t idx_base; /* idx_base and idx_base+1 get completion value and type */ duk_uint32_t flags; /* type and control flags, label number */ /* XXX: could pack 'flags' and 'idx_base' to same value in practice, * on 32-bit targets this would make duk_catcher 16 bytes. */ }; struct duk_hthread { /* Shared object part */ duk_hobject obj; /* Pointer to bytecode executor's 'curr_pc' variable. Used to copy * the current PC back into the topmost activation when activation * state is about to change (or "syncing" is otherwise needed). This * is rather awkward but important for performance, see execution.rst. */ duk_instr_t **ptr_curr_pc; /* Backpointers. */ duk_heap *heap; /* Current strictness flag: affects API calls. */ duk_uint8_t strict; /* Thread state. */ duk_uint8_t state; duk_uint8_t unused1; duk_uint8_t unused2; /* XXX: Valstack and callstack are currently assumed to have non-NULL * pointers. Relaxing this would not lead to big benefits (except * perhaps for terminated threads). */ /* Value stack: these are expressed as pointers for faster stack * manipulation. [valstack,valstack_top[ is GC-reachable, * [valstack_top,valstack_alloc_end[ is not GC-reachable but kept * initialized as 'undefined'. [valstack,valstack_end[ is the * guaranteed/reserved space and the valstack cannot be resized to * a smaller size. [valstack_end,valstack_alloc_end[ is currently * allocated slack that can be used to grow the current guaranteed * space but may be shrunk away without notice. * * * <----------------------- guaranteed ---> * <---- slack ---> * <--- frame ---> * .-------------+=============+----------+--------------. * |xxxxxxxxxxxxx|yyyyyyyyyyyyy|uuuuuuuuuu|uuuuuuuuuuuuuu| * `-------------+=============+----------+--------------' * * ^ ^ ^ ^ ^ * | | | | | * valstack bottom top end alloc_end * * xxx = arbitrary values, below current frame * yyy = arbitrary values, inside current frame * uuu = outside active value stack, initialized to 'undefined' */ duk_tval *valstack; /* start of valstack allocation */ duk_tval *valstack_end; /* end of valstack reservation/guarantee (exclusive) */ duk_tval *valstack_alloc_end; /* end of valstack allocation */ duk_tval *valstack_bottom; /* bottom of current frame */ duk_tval *valstack_top; /* top of current frame (exclusive) */ /* Call stack, represented as a linked list starting from the current * activation (or NULL if nothing is active). */ duk_activation *callstack_curr; /* current activation (or NULL if none) */ duk_size_t callstack_top; /* number of activation records in callstack (0 if none) */ duk_size_t callstack_preventcount; /* number of activation records in callstack preventing a yield */ /* Yield/resume book-keeping. */ duk_hthread *resumer; /* who resumed us (if any) */ /* Current compiler state (if any), used for augmenting SyntaxErrors. */ duk_compiler_ctx *compile_ctx; #if defined(DUK_USE_INTERRUPT_COUNTER) /* Interrupt counter for triggering a slow path check for execution * timeout, debugger interaction such as breakpoints, etc. The value * is valid for the current running thread, and both the init and * counter values are copied whenever a thread switch occurs. It's * important for the counter to be conveniently accessible for the * bytecode executor inner loop for performance reasons. */ duk_int_t interrupt_counter; /* countdown state */ duk_int_t interrupt_init; /* start value for current countdown */ #endif /* Builtin-objects; may or may not be shared with other threads, * threads existing in different "compartments" will have different * built-ins. Must be stored on a per-thread basis because there * is no intermediate structure for a thread group / compartment. * This takes quite a lot of space, currently 43x4 = 172 bytes on * 32-bit platforms. * * In some cases the builtins array could be ROM based, but it's * sometimes edited (e.g. for sandboxing) so it's better to keep * this array in RAM. */ duk_hobject *builtins[DUK_NUM_BUILTINS]; /* Convenience copies from heap/vm for faster access. */ #if defined(DUK_USE_ROM_STRINGS) /* No field needed when strings are in ROM. */ #else #if defined(DUK_USE_HEAPPTR16) duk_uint16_t *strs16; #else duk_hstring **strs; #endif #endif }; /* * Prototypes */ DUK_INTERNAL_DECL void duk_hthread_copy_builtin_objects(duk_hthread *thr_from, duk_hthread *thr_to); DUK_INTERNAL_DECL void duk_hthread_create_builtin_objects(duk_hthread *thr); DUK_INTERNAL_DECL duk_bool_t duk_hthread_init_stacks(duk_heap *heap, duk_hthread *thr); DUK_INTERNAL_DECL void duk_hthread_terminate(duk_hthread *thr); DUK_INTERNAL_DECL DUK_INLINE duk_activation *duk_hthread_activation_alloc(duk_hthread *thr); DUK_INTERNAL_DECL void duk_hthread_activation_free(duk_hthread *thr, duk_activation *act); DUK_INTERNAL_DECL void duk_hthread_activation_unwind_norz(duk_hthread *thr); DUK_INTERNAL_DECL void duk_hthread_activation_unwind_reuse_norz(duk_hthread *thr); DUK_INTERNAL_DECL duk_activation *duk_hthread_get_activation_for_level(duk_hthread *thr, duk_int_t level); DUK_INTERNAL_DECL DUK_INLINE duk_catcher *duk_hthread_catcher_alloc(duk_hthread *thr); DUK_INTERNAL_DECL void duk_hthread_catcher_free(duk_hthread *thr, duk_catcher *cat); DUK_INTERNAL_DECL void duk_hthread_catcher_unwind_norz(duk_hthread *thr, duk_activation *act); DUK_INTERNAL_DECL void duk_hthread_catcher_unwind_nolexenv_norz(duk_hthread *thr, duk_activation *act); #if defined(DUK_USE_FINALIZER_TORTURE) DUK_INTERNAL_DECL void duk_hthread_valstack_torture_realloc(duk_hthread *thr); #endif DUK_INTERNAL_DECL void *duk_hthread_get_valstack_ptr(duk_heap *heap, void *ud); /* indirect allocs */ #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_INTERNAL_DECL duk_uint_fast32_t duk_hthread_get_act_curr_pc(duk_hthread *thr, duk_activation *act); #endif DUK_INTERNAL_DECL duk_uint_fast32_t duk_hthread_get_act_prev_pc(duk_hthread *thr, duk_activation *act); DUK_INTERNAL_DECL void duk_hthread_sync_currpc(duk_hthread *thr); DUK_INTERNAL_DECL void duk_hthread_sync_and_null_currpc(duk_hthread *thr); #endif /* DUK_HTHREAD_H_INCLUDED */ /* #include duk_harray.h */ /* * Array object representation, used for actual Array instances. * * All objects with the exotic array behavior (which must coincide with having * internal class array) MUST be duk_harrays. No other object can be a * duk_harray. However, duk_harrays may not always have an array part. */ #if !defined(DUK_HARRAY_H_INCLUDED) #define DUK_HARRAY_H_INCLUDED #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_harray_assert_valid(duk_harray *h); #define DUK_HARRAY_ASSERT_VALID(h) do { duk_harray_assert_valid((h)); } while (0) #else #define DUK_HARRAY_ASSERT_VALID(h) do {} while (0) #endif #define DUK_HARRAY_LENGTH_WRITABLE(h) (!(h)->length_nonwritable) #define DUK_HARRAY_LENGTH_NONWRITABLE(h) ((h)->length_nonwritable) #define DUK_HARRAY_SET_LENGTH_WRITABLE(h) do { (h)->length_nonwritable = 0; } while (0) #define DUK_HARRAY_SET_LENGTH_NONWRITABLE(h) do { (h)->length_nonwritable = 1; } while (0) struct duk_harray { /* Shared object part. */ duk_hobject obj; /* Array .length. * * At present Array .length may be smaller, equal, or even larger * than the allocated underlying array part. Fast path code must * always take this into account carefully. */ duk_uint32_t length; /* Array .length property attributes. The property is always * non-enumerable and non-configurable. It's initially writable * but per Object.defineProperty() rules it can be made non-writable * even if it is non-configurable. Thus we need to track the * writability explicitly. * * XXX: this field to be eliminated and moved into duk_hobject * flags field to save space. */ duk_bool_t length_nonwritable; }; #endif /* DUK_HARRAY_H_INCLUDED */ /* #include duk_henv.h */ /* * Environment object representation. */ #if !defined(DUK_HENV_H_INCLUDED) #define DUK_HENV_H_INCLUDED #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_hdecenv_assert_valid(duk_hdecenv *h); DUK_INTERNAL_DECL void duk_hobjenv_assert_valid(duk_hobjenv *h); #define DUK_HDECENV_ASSERT_VALID(h) do { duk_hdecenv_assert_valid((h)); } while (0) #define DUK_HOBJENV_ASSERT_VALID(h) do { duk_hobjenv_assert_valid((h)); } while (0) #else #define DUK_HDECENV_ASSERT_VALID(h) do {} while (0) #define DUK_HOBJENV_ASSERT_VALID(h) do {} while (0) #endif struct duk_hdecenv { /* Shared object part. */ duk_hobject obj; /* These control variables provide enough information to access live * variables for a closure that is still open. If thread == NULL, * the record is closed and the identifiers are in the property table. */ duk_hthread *thread; duk_hobject *varmap; duk_size_t regbase_byteoff; }; struct duk_hobjenv { /* Shared object part. */ duk_hobject obj; /* Target object and 'this' binding for object binding. */ duk_hobject *target; /* The 'target' object is used as a this binding in only some object * environments. For example, the global environment does not provide * a this binding, but a with statement does. */ duk_bool_t has_this; }; #endif /* DUK_HENV_H_INCLUDED */ /* #include duk_hbuffer.h */ /* * Heap buffer representation. * * Heap allocated user data buffer which is either: * * 1. A fixed size buffer (data follows header statically) * 2. A dynamic size buffer (data pointer follows header) * * The data pointer for a variable size buffer of zero size may be NULL. */ #if !defined(DUK_HBUFFER_H_INCLUDED) #define DUK_HBUFFER_H_INCLUDED /* * Flags * * Fixed buffer: 0 * Dynamic buffer: DUK_HBUFFER_FLAG_DYNAMIC * External buffer: DUK_HBUFFER_FLAG_DYNAMIC | DUK_HBUFFER_FLAG_EXTERNAL */ #define DUK_HBUFFER_FLAG_DYNAMIC DUK_HEAPHDR_USER_FLAG(0) /* buffer is behind a pointer, dynamic or external */ #define DUK_HBUFFER_FLAG_EXTERNAL DUK_HEAPHDR_USER_FLAG(1) /* buffer pointer is to an externally allocated buffer */ #define DUK_HBUFFER_HAS_DYNAMIC(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_DYNAMIC) #define DUK_HBUFFER_HAS_EXTERNAL(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_EXTERNAL) #define DUK_HBUFFER_SET_DYNAMIC(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_DYNAMIC) #define DUK_HBUFFER_SET_EXTERNAL(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_EXTERNAL) #define DUK_HBUFFER_CLEAR_DYNAMIC(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_DYNAMIC) #define DUK_HBUFFER_CLEAR_EXTERNAL(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_EXTERNAL) /* * Misc defines */ /* Impose a maximum buffer length for now. Restricted artificially to * ensure resize computations or adding a heap header length won't * overflow size_t and that a signed duk_int_t can hold a buffer * length. The limit should be synchronized with DUK_HSTRING_MAX_BYTELEN. */ #if defined(DUK_USE_BUFLEN16) #define DUK_HBUFFER_MAX_BYTELEN (0x0000ffffUL) #else /* Intentionally not 0x7fffffffUL; at least JSON code expects that * 2*len + 2 fits in 32 bits. */ #define DUK_HBUFFER_MAX_BYTELEN (0x7ffffffeUL) #endif /* * Field access */ #if defined(DUK_USE_BUFLEN16) /* size stored in duk_heaphdr unused flag bits */ #define DUK_HBUFFER_GET_SIZE(x) ((x)->hdr.h_flags >> 16) #define DUK_HBUFFER_SET_SIZE(x,v) do { \ duk_size_t duk__v; \ duk__v = (v); \ DUK_ASSERT(duk__v <= 0xffffUL); \ (x)->hdr.h_flags = ((x)->hdr.h_flags & 0x0000ffffUL) | (((duk_uint32_t) duk__v) << 16); \ } while (0) #define DUK_HBUFFER_ADD_SIZE(x,dv) do { \ (x)->hdr.h_flags += ((dv) << 16); \ } while (0) #define DUK_HBUFFER_SUB_SIZE(x,dv) do { \ (x)->hdr.h_flags -= ((dv) << 16); \ } while (0) #else #define DUK_HBUFFER_GET_SIZE(x) (((duk_hbuffer *) (x))->size) #define DUK_HBUFFER_SET_SIZE(x,v) do { \ ((duk_hbuffer *) (x))->size = (v); \ } while (0) #define DUK_HBUFFER_ADD_SIZE(x,dv) do { \ (x)->size += (dv); \ } while (0) #define DUK_HBUFFER_SUB_SIZE(x,dv) do { \ (x)->size -= (dv); \ } while (0) #endif #define DUK_HBUFFER_FIXED_GET_SIZE(x) DUK_HBUFFER_GET_SIZE((duk_hbuffer *) (x)) #define DUK_HBUFFER_FIXED_SET_SIZE(x,v) DUK_HBUFFER_SET_SIZE((duk_hbuffer *) (x)) #define DUK_HBUFFER_DYNAMIC_GET_SIZE(x) DUK_HBUFFER_GET_SIZE((duk_hbuffer *) (x)) #define DUK_HBUFFER_DYNAMIC_SET_SIZE(x,v) DUK_HBUFFER_SET_SIZE((duk_hbuffer *) (x), (v)) #define DUK_HBUFFER_DYNAMIC_ADD_SIZE(x,dv) DUK_HBUFFER_ADD_SIZE((duk_hbuffer *) (x), (dv)) #define DUK_HBUFFER_DYNAMIC_SUB_SIZE(x,dv) DUK_HBUFFER_SUB_SIZE((duk_hbuffer *) (x), (dv)) #define DUK_HBUFFER_EXTERNAL_GET_SIZE(x) DUK_HBUFFER_GET_SIZE((duk_hbuffer *) (x)) #define DUK_HBUFFER_EXTERNAL_SET_SIZE(x,v) DUK_HBUFFER_SET_SIZE((duk_hbuffer *) (x), (v)) #define DUK_HBUFFER_FIXED_GET_DATA_PTR(heap,x) ((duk_uint8_t *) (((duk_hbuffer_fixed *) (void *) (x)) + 1)) #if defined(DUK_USE_HEAPPTR16) #define DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap,x) \ ((void *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, ((duk_heaphdr *) (x))->h_extra16)) #define DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(heap,x,v) do { \ ((duk_heaphdr *) (x))->h_extra16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \ } while (0) #define DUK_HBUFFER_DYNAMIC_SET_DATA_PTR_NULL(heap,x) do { \ ((duk_heaphdr *) (x))->h_extra16 = 0; /* assume 0 <=> NULL */ \ } while (0) #else #define DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap,x) ((x)->curr_alloc) #define DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(heap,x,v) do { \ (x)->curr_alloc = (void *) (v); \ } while (0) #define DUK_HBUFFER_DYNAMIC_SET_DATA_PTR_NULL(heap,x) do { \ (x)->curr_alloc = (void *) NULL; \ } while (0) #endif /* No pointer compression because pointer is potentially outside of * Duktape heap. */ #if defined(DUK_USE_HEAPPTR16) #define DUK_HBUFFER_EXTERNAL_GET_DATA_PTR(heap,x) \ ((void *) (x)->curr_alloc) #define DUK_HBUFFER_EXTERNAL_SET_DATA_PTR(heap,x,v) do { \ (x)->curr_alloc = (void *) (v); \ } while (0) #define DUK_HBUFFER_EXTERNAL_SET_DATA_PTR_NULL(heap,x) do { \ (x)->curr_alloc = (void *) NULL; \ } while (0) #else #define DUK_HBUFFER_EXTERNAL_GET_DATA_PTR(heap,x) \ ((void *) (x)->curr_alloc) #define DUK_HBUFFER_EXTERNAL_SET_DATA_PTR(heap,x,v) do { \ (x)->curr_alloc = (void *) (v); \ } while (0) #define DUK_HBUFFER_EXTERNAL_SET_DATA_PTR_NULL(heap,x) do { \ (x)->curr_alloc = (void *) NULL; \ } while (0) #endif /* Get a pointer to the current buffer contents (matching current allocation * size). May be NULL for zero size dynamic/external buffer. */ #if defined(DUK_USE_HEAPPTR16) #define DUK_HBUFFER_GET_DATA_PTR(heap,x) ( \ DUK_HBUFFER_HAS_DYNAMIC((x)) ? \ ( \ DUK_HBUFFER_HAS_EXTERNAL((x)) ? \ DUK_HBUFFER_EXTERNAL_GET_DATA_PTR((heap), (duk_hbuffer_external *) (x)) : \ DUK_HBUFFER_DYNAMIC_GET_DATA_PTR((heap), (duk_hbuffer_dynamic *) (x)) \ ) : \ DUK_HBUFFER_FIXED_GET_DATA_PTR((heap), (duk_hbuffer_fixed *) (void *) (x)) \ ) #else /* Without heap pointer compression duk_hbuffer_dynamic and duk_hbuffer_external * have the same layout so checking for fixed vs. dynamic (or external) is enough. */ #define DUK_HBUFFER_GET_DATA_PTR(heap,x) ( \ DUK_HBUFFER_HAS_DYNAMIC((x)) ? \ DUK_HBUFFER_DYNAMIC_GET_DATA_PTR((heap), (duk_hbuffer_dynamic *) (x)) : \ DUK_HBUFFER_FIXED_GET_DATA_PTR((heap), (duk_hbuffer_fixed *) (void *) (x)) \ ) #endif /* Validity assert. */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_hbuffer_assert_valid(duk_hbuffer *h); #define DUK_HBUFFER_ASSERT_VALID(h) do { duk_hbuffer_assert_valid((h)); } while (0) #else #define DUK_HBUFFER_ASSERT_VALID(h) do {} while (0) #endif /* * Structs */ /* Shared prefix for all buffer types. */ struct duk_hbuffer { duk_heaphdr hdr; /* It's not strictly necessary to track the current size, but * it is useful for writing robust native code. */ /* Current size. */ #if defined(DUK_USE_BUFLEN16) /* Stored in duk_heaphdr unused flags. */ #else duk_size_t size; #endif /* * Data following the header depends on the DUK_HBUFFER_FLAG_DYNAMIC * flag. * * If the flag is clear (the buffer is a fixed size one), the buffer * data follows the header directly, consisting of 'size' bytes. * * If the flag is set, the actual buffer is allocated separately, and * a few control fields follow the header. Specifically: * * - a "void *" pointing to the current allocation * - a duk_size_t indicating the full allocated size (always >= 'size') * * If DUK_HBUFFER_FLAG_EXTERNAL is set, the buffer has been allocated * by user code, so that Duktape won't be able to resize it and won't * free it. This allows buffers to point to e.g. an externally * allocated structure such as a frame buffer. * * Unlike strings, no terminator byte (NUL) is guaranteed after the * data. This would be convenient, but would pad aligned user buffers * unnecessarily upwards in size. For instance, if user code requested * a 64-byte dynamic buffer, 65 bytes would actually be allocated which * would then potentially round upwards to perhaps 68 or 72 bytes. */ }; /* Fixed buffer; data follows struct, with proper alignment guaranteed by * struct size. */ #if (DUK_USE_ALIGN_BY == 8) && defined(DUK_USE_PACK_MSVC_PRAGMA) #pragma pack(push, 8) #endif struct duk_hbuffer_fixed { /* A union is used here as a portable struct size / alignment trick: * by adding a 32-bit or a 64-bit (unused) union member, the size of * the struct is effectively forced to be a multiple of 4 or 8 bytes * (respectively) without increasing the size of the struct unless * necessary. */ union { struct { duk_heaphdr hdr; #if defined(DUK_USE_BUFLEN16) /* Stored in duk_heaphdr unused flags. */ #else duk_size_t size; #endif } s; #if (DUK_USE_ALIGN_BY == 4) duk_uint32_t dummy_for_align4; #elif (DUK_USE_ALIGN_BY == 8) duk_double_t dummy_for_align8_1; #if defined(DUK_USE_64BIT_OPS) duk_uint64_t dummy_for_align8_2; #endif #elif (DUK_USE_ALIGN_BY == 1) /* no extra padding */ #else #error invalid DUK_USE_ALIGN_BY #endif } u; /* * Data follows the struct header. The struct size is padded by the * compiler based on the struct members. This guarantees that the * buffer data will be aligned-by-4 but not necessarily aligned-by-8. * * On platforms where alignment does not matter, the struct padding * could be removed (if there is any). On platforms where alignment * by 8 is required, the struct size must be forced to be a multiple * of 8 by some means. Without it, some user code may break, and also * Duktape itself breaks (e.g. the compiler stores duk_tvals in a * dynamic buffer). */ } #if (DUK_USE_ALIGN_BY == 8) && defined(DUK_USE_PACK_GCC_ATTR) __attribute__ ((aligned (8))) #elif (DUK_USE_ALIGN_BY == 8) && defined(DUK_USE_PACK_CLANG_ATTR) __attribute__ ((aligned (8))) #endif ; #if (DUK_USE_ALIGN_BY == 8) && defined(DUK_USE_PACK_MSVC_PRAGMA) #pragma pack(pop) #endif /* Dynamic buffer with 'curr_alloc' pointing to a dynamic area allocated using * heap allocation primitives. Also used for external buffers when low memory * options are not used. */ struct duk_hbuffer_dynamic { duk_heaphdr hdr; #if defined(DUK_USE_BUFLEN16) /* Stored in duk_heaphdr unused flags. */ #else duk_size_t size; #endif #if defined(DUK_USE_HEAPPTR16) /* Stored in duk_heaphdr h_extra16. */ #else void *curr_alloc; /* may be NULL if alloc_size == 0 */ #endif /* * Allocation size for 'curr_alloc' is alloc_size. There is no * automatic NUL terminator for buffers (see above for rationale). * * 'curr_alloc' is explicitly allocated with heap allocation * primitives and will thus always have alignment suitable for * e.g. duk_tval and an IEEE double. */ }; /* External buffer with 'curr_alloc' managed by user code and pointing to an * arbitrary address. When heap pointer compression is not used, this struct * has the same layout as duk_hbuffer_dynamic. */ struct duk_hbuffer_external { duk_heaphdr hdr; #if defined(DUK_USE_BUFLEN16) /* Stored in duk_heaphdr unused flags. */ #else duk_size_t size; #endif /* Cannot be compressed as a heap pointer because may point to * an arbitrary address. */ void *curr_alloc; /* may be NULL if alloc_size == 0 */ }; /* * Prototypes */ DUK_INTERNAL_DECL duk_hbuffer *duk_hbuffer_alloc(duk_heap *heap, duk_size_t size, duk_small_uint_t flags, void **out_bufdata); DUK_INTERNAL_DECL void *duk_hbuffer_get_dynalloc_ptr(duk_heap *heap, void *ud); /* indirect allocs */ /* dynamic buffer ops */ DUK_INTERNAL_DECL void duk_hbuffer_resize(duk_hthread *thr, duk_hbuffer_dynamic *buf, duk_size_t new_size); DUK_INTERNAL_DECL void duk_hbuffer_reset(duk_hthread *thr, duk_hbuffer_dynamic *buf); #endif /* DUK_HBUFFER_H_INCLUDED */ /* #include duk_hproxy.h */ /* * Proxy object representation. */ #if !defined(DUK_HPROXY_H_INCLUDED) #define DUK_HPROXY_H_INCLUDED #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_hproxy_assert_valid(duk_hproxy *h); #define DUK_HPROXY_ASSERT_VALID(h) do { duk_hproxy_assert_valid((h)); } while (0) #else #define DUK_HPROXY_ASSERT_VALID(h) do {} while (0) #endif struct duk_hproxy { /* Shared object part. */ duk_hobject obj; /* Proxy target object. */ duk_hobject *target; /* Proxy handlers (traps). */ duk_hobject *handler; }; #endif /* DUK_HPROXY_H_INCLUDED */ /* #include duk_heap.h */ /* * Heap structure. * * Heap contains allocated heap objects, interned strings, and built-in * strings for one or more threads. */ #if !defined(DUK_HEAP_H_INCLUDED) #define DUK_HEAP_H_INCLUDED /* alloc function typedefs in duktape.h */ /* * Heap flags */ #define DUK_HEAP_FLAG_MARKANDSWEEP_RECLIMIT_REACHED (1U << 0) /* mark-and-sweep marking reached a recursion limit and must use multi-pass marking */ #define DUK_HEAP_FLAG_INTERRUPT_RUNNING (1U << 1) /* executor interrupt running (used to avoid nested interrupts) */ #define DUK_HEAP_FLAG_FINALIZER_NORESCUE (1U << 2) /* heap destruction ongoing, finalizer rescue no longer possible */ #define DUK_HEAP_FLAG_DEBUGGER_PAUSED (1U << 3) /* debugger is paused: talk with debug client until step/resume */ #define DUK__HEAP_HAS_FLAGS(heap,bits) ((heap)->flags & (bits)) #define DUK__HEAP_SET_FLAGS(heap,bits) do { \ (heap)->flags |= (bits); \ } while (0) #define DUK__HEAP_CLEAR_FLAGS(heap,bits) do { \ (heap)->flags &= ~(bits); \ } while (0) #define DUK_HEAP_HAS_MARKANDSWEEP_RECLIMIT_REACHED(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_MARKANDSWEEP_RECLIMIT_REACHED) #define DUK_HEAP_HAS_INTERRUPT_RUNNING(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_INTERRUPT_RUNNING) #define DUK_HEAP_HAS_FINALIZER_NORESCUE(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_FINALIZER_NORESCUE) #define DUK_HEAP_HAS_DEBUGGER_PAUSED(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_DEBUGGER_PAUSED) #define DUK_HEAP_SET_MARKANDSWEEP_RECLIMIT_REACHED(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_MARKANDSWEEP_RECLIMIT_REACHED) #define DUK_HEAP_SET_INTERRUPT_RUNNING(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_INTERRUPT_RUNNING) #define DUK_HEAP_SET_FINALIZER_NORESCUE(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_FINALIZER_NORESCUE) #define DUK_HEAP_SET_DEBUGGER_PAUSED(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_DEBUGGER_PAUSED) #define DUK_HEAP_CLEAR_MARKANDSWEEP_RECLIMIT_REACHED(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_MARKANDSWEEP_RECLIMIT_REACHED) #define DUK_HEAP_CLEAR_INTERRUPT_RUNNING(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_INTERRUPT_RUNNING) #define DUK_HEAP_CLEAR_FINALIZER_NORESCUE(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_FINALIZER_NORESCUE) #define DUK_HEAP_CLEAR_DEBUGGER_PAUSED(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_DEBUGGER_PAUSED) /* * Longjmp types, also double as identifying continuation type for a rethrow (in 'finally') */ #define DUK_LJ_TYPE_UNKNOWN 0 /* unused */ #define DUK_LJ_TYPE_THROW 1 /* value1 -> error object */ #define DUK_LJ_TYPE_YIELD 2 /* value1 -> yield value, iserror -> error / normal */ #define DUK_LJ_TYPE_RESUME 3 /* value1 -> resume value, value2 -> resumee thread, iserror -> error/normal */ #define DUK_LJ_TYPE_BREAK 4 /* value1 -> label number, pseudo-type to indicate a break continuation (for ENDFIN) */ #define DUK_LJ_TYPE_CONTINUE 5 /* value1 -> label number, pseudo-type to indicate a continue continuation (for ENDFIN) */ #define DUK_LJ_TYPE_RETURN 6 /* value1 -> return value, pseudo-type to indicate a return continuation (for ENDFIN) */ #define DUK_LJ_TYPE_NORMAL 7 /* no value, pseudo-type to indicate a normal continuation (for ENDFIN) */ /* * Mark-and-sweep flags * * These are separate from heap level flags now but could be merged. * The heap structure only contains a 'base mark-and-sweep flags' * field and the GC caller can impose further flags. */ /* Emergency mark-and-sweep: try extra hard, even at the cost of * performance. */ #define DUK_MS_FLAG_EMERGENCY (1U << 0) /* Voluntary mark-and-sweep: triggered periodically. */ #define DUK_MS_FLAG_VOLUNTARY (1U << 1) /* Postpone rescue decisions for reachable objects with FINALIZED set. * Used during finalize_list processing to avoid incorrect rescue * decisions due to finalize_list being a reachability root. */ #define DUK_MS_FLAG_POSTPONE_RESCUE (1U << 2) /* Don't compact objects; needed during object property table resize * to prevent a recursive resize. It would suffice to protect only the * current object being resized, but this is not yet implemented. */ #define DUK_MS_FLAG_NO_OBJECT_COMPACTION (1U << 3) /* * Thread switching * * To switch heap->curr_thread, use the macro below so that interrupt counters * get updated correctly. The macro allows a NULL target thread because that * happens e.g. in call handling. */ #if defined(DUK_USE_INTERRUPT_COUNTER) #define DUK_HEAP_SWITCH_THREAD(heap,newthr) duk_heap_switch_thread((heap), (newthr)) #else #define DUK_HEAP_SWITCH_THREAD(heap,newthr) do { \ (heap)->curr_thread = (newthr); \ } while (0) #endif /* * Stats */ #if defined(DUK_USE_DEBUG) #define DUK_STATS_INC(heap,fieldname) do { \ (heap)->fieldname += 1; \ } while (0) #else #define DUK_STATS_INC(heap,fieldname) do {} while (0) #endif /* * Other heap related defines */ /* Mark-and-sweep interval is relative to combined count of objects and * strings kept in the heap during the latest mark-and-sweep pass. * Fixed point .8 multiplier and .0 adder. Trigger count (interval) is * decreased by each (re)allocation attempt (regardless of size), and each * refzero processed object. * * 'SKIP' indicates how many (re)allocations to wait until a retry if * GC is skipped because there is no thread do it with yet (happens * only during init phases). */ #if defined(DUK_USE_REFERENCE_COUNTING) #define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_MULT 12800L /* 50x heap size */ #define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_ADD 1024L #define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_SKIP 256L #else #define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_MULT 256L /* 1x heap size */ #define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_ADD 1024L #define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_SKIP 256L #endif /* GC torture. */ #if defined(DUK_USE_GC_TORTURE) #define DUK_GC_TORTURE(heap) do { duk_heap_mark_and_sweep((heap), 0); } while (0) #else #define DUK_GC_TORTURE(heap) do { } while (0) #endif /* Stringcache is used for speeding up char-offset-to-byte-offset * translations for non-ASCII strings. */ #define DUK_HEAP_STRCACHE_SIZE 4 #define DUK_HEAP_STRINGCACHE_NOCACHE_LIMIT 16 /* strings up to the this length are not cached */ /* Some list management macros. */ #define DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap,hdr) duk_heap_insert_into_heap_allocated((heap), (hdr)) #if defined(DUK_USE_REFERENCE_COUNTING) #define DUK_HEAP_REMOVE_FROM_HEAP_ALLOCATED(heap,hdr) duk_heap_remove_from_heap_allocated((heap), (hdr)) #endif #if defined(DUK_USE_FINALIZER_SUPPORT) #define DUK_HEAP_INSERT_INTO_FINALIZE_LIST(heap,hdr) duk_heap_insert_into_finalize_list((heap), (hdr)) #define DUK_HEAP_REMOVE_FROM_FINALIZE_LIST(heap,hdr) duk_heap_remove_from_finalize_list((heap), (hdr)) #endif /* * Built-in strings */ /* heap string indices are autogenerated in duk_strings.h */ #if defined(DUK_USE_ROM_STRINGS) #define DUK_HEAP_GET_STRING(heap,idx) \ ((duk_hstring *) DUK_LOSE_CONST(duk_rom_strings_stridx[(idx)])) #else /* DUK_USE_ROM_STRINGS */ #if defined(DUK_USE_HEAPPTR16) #define DUK_HEAP_GET_STRING(heap,idx) \ ((duk_hstring *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (heap)->strs16[(idx)])) #else #define DUK_HEAP_GET_STRING(heap,idx) \ ((heap)->strs[(idx)]) #endif #endif /* DUK_USE_ROM_STRINGS */ /* * Raw memory calls: relative to heap, but no GC interaction */ #define DUK_ALLOC_RAW(heap,size) \ ((heap)->alloc_func((heap)->heap_udata, (size))) #define DUK_REALLOC_RAW(heap,ptr,newsize) \ ((heap)->realloc_func((heap)->heap_udata, (void *) (ptr), (newsize))) #define DUK_FREE_RAW(heap,ptr) \ ((heap)->free_func((heap)->heap_udata, (void *) (ptr))) /* * Memory calls: relative to heap, GC interaction, but no error throwing. * * XXX: Currently a mark-and-sweep triggered by memory allocation will run * using the heap->heap_thread. This thread is also used for running * mark-and-sweep finalization; this is not ideal because it breaks the * isolation between multiple global environments. * * Notes: * * - DUK_FREE() is required to ignore NULL and any other possible return * value of a zero-sized alloc/realloc (same as ANSI C free()). * * - There is no DUK_REALLOC_ZEROED because we don't assume to know the * old size. Caller must zero the reallocated memory. * * - DUK_REALLOC_INDIRECT() must be used when a mark-and-sweep triggered * by an allocation failure might invalidate the original 'ptr', thus * causing a realloc retry to use an invalid pointer. Example: we're * reallocating the value stack and a finalizer resizes the same value * stack during mark-and-sweep. The indirect variant requests for the * current location of the pointer being reallocated using a callback * right before every realloc attempt; this circuitous approach is used * to avoid strict aliasing issues in a more straightforward indirect * pointer (void **) approach. Note: the pointer in the storage * location is read but is NOT updated; the caller must do that. */ /* callback for indirect reallocs, request for current pointer */ typedef void *(*duk_mem_getptr)(duk_heap *heap, void *ud); #define DUK_ALLOC(heap,size) duk_heap_mem_alloc((heap), (size)) #define DUK_ALLOC_ZEROED(heap,size) duk_heap_mem_alloc_zeroed((heap), (size)) #define DUK_REALLOC(heap,ptr,newsize) duk_heap_mem_realloc((heap), (ptr), (newsize)) #define DUK_REALLOC_INDIRECT(heap,cb,ud,newsize) duk_heap_mem_realloc_indirect((heap), (cb), (ud), (newsize)) #define DUK_FREE(heap,ptr) duk_heap_mem_free((heap), (ptr)) /* * Checked allocation, relative to a thread * * DUK_FREE_CHECKED() doesn't actually throw, but accepts a 'thr' argument * for convenience. */ #define DUK_ALLOC_CHECKED(thr,size) duk_heap_mem_alloc_checked((thr), (size)) #define DUK_ALLOC_CHECKED_ZEROED(thr,size) duk_heap_mem_alloc_checked_zeroed((thr), (size)) #define DUK_FREE_CHECKED(thr,ptr) duk_heap_mem_free((thr)->heap, (ptr)) /* * Memory constants */ #define DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_LIMIT 10 /* Retry allocation after mark-and-sweep for this * many times. A single mark-and-sweep round is * not guaranteed to free all unreferenced memory * because of finalization (in fact, ANY number of * rounds is strictly not enough). */ #define DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_EMERGENCY_LIMIT 3 /* Starting from this round, use emergency mode * for mark-and-sweep. */ /* * Debugger support */ /* Maximum number of breakpoints. Only breakpoints that are set are * consulted so increasing this has no performance impact. */ #define DUK_HEAP_MAX_BREAKPOINTS 16 /* Opcode interval for a Date-based status/peek rate limit check. Only * relevant when debugger is attached. Requesting a timestamp may be a * slow operation on some platforms so this shouldn't be too low. On the * other hand a high value makes Duktape react to a pause request slowly. */ #define DUK_HEAP_DBG_RATELIMIT_OPCODES 4000 /* Milliseconds between status notify and transport peeks. */ #define DUK_HEAP_DBG_RATELIMIT_MILLISECS 200 /* Debugger pause flags. */ #define DUK_PAUSE_FLAG_ONE_OPCODE (1U << 0) /* pause when a single opcode has been executed */ #define DUK_PAUSE_FLAG_ONE_OPCODE_ACTIVE (1U << 1) /* one opcode pause actually active; artifact of current implementation */ #define DUK_PAUSE_FLAG_LINE_CHANGE (1U << 2) /* pause when current line number changes */ #define DUK_PAUSE_FLAG_FUNC_ENTRY (1U << 3) /* pause when entering a function */ #define DUK_PAUSE_FLAG_FUNC_EXIT (1U << 4) /* pause when exiting current function */ #define DUK_PAUSE_FLAG_CAUGHT_ERROR (1U << 5) /* pause when about to throw an error that is caught */ #define DUK_PAUSE_FLAG_UNCAUGHT_ERROR (1U << 6) /* pause when about to throw an error that won't be caught */ struct duk_breakpoint { duk_hstring *filename; duk_uint32_t line; }; /* * String cache should ideally be at duk_hthread level, but that would * cause string finalization to slow down relative to the number of * threads; string finalization must check the string cache for "weak" * references to the string being finalized to avoid dead pointers. * * Thus, string caches are now at the heap level now. */ struct duk_strcache_entry { duk_hstring *h; duk_uint32_t bidx; duk_uint32_t cidx; }; /* * Longjmp state, contains the information needed to perform a longjmp. * Longjmp related values are written to value1, value2, and iserror. */ struct duk_ljstate { duk_jmpbuf *jmpbuf_ptr; /* current setjmp() catchpoint */ duk_small_uint_t type; /* longjmp type */ duk_bool_t iserror; /* isError flag for yield */ duk_tval value1; /* 1st related value (type specific) */ duk_tval value2; /* 2nd related value (type specific) */ }; #define DUK_ASSERT_LJSTATE_UNSET(heap) do { \ DUK_ASSERT(heap != NULL); \ DUK_ASSERT(heap->lj.type == DUK_LJ_TYPE_UNKNOWN); \ DUK_ASSERT(heap->lj.iserror == 0); \ DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&heap->lj.value1)); \ DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&heap->lj.value2)); \ } while (0) #define DUK_ASSERT_LJSTATE_SET(heap) do { \ DUK_ASSERT(heap != NULL); \ DUK_ASSERT(heap->lj.type != DUK_LJ_TYPE_UNKNOWN); \ } while (0) /* * Literal intern cache */ struct duk_litcache_entry { const duk_uint8_t *addr; duk_hstring *h; }; /* * Main heap structure */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL void duk_heap_assert_valid(duk_heap *heap); #define DUK_HEAP_ASSERT_VALID(heap) do { duk_heap_assert_valid((heap)); } while (0) #else #define DUK_HEAP_ASSERT_VALID(heap) do {} while (0) #endif struct duk_heap { duk_small_uint_t flags; /* Allocator functions. */ duk_alloc_function alloc_func; duk_realloc_function realloc_func; duk_free_function free_func; /* Heap udata, used for allocator functions but also for other heap * level callbacks like fatal function, pointer compression, etc. */ void *heap_udata; /* Fatal error handling, called e.g. when a longjmp() is needed but * lj.jmpbuf_ptr is NULL. fatal_func must never return; it's not * declared as "noreturn" because doing that for typedefs is a bit * challenging portability-wise. */ duk_fatal_function fatal_func; /* Main list of allocated heap objects. Objects are either here, * in finalize_list waiting for processing, or in refzero_list * temporarily while a DECREF refzero cascade finishes. */ duk_heaphdr *heap_allocated; /* Temporary work list for freeing a cascade of objects when a DECREF * (or DECREF_NORZ) encounters a zero refcount. Using a work list * allows fixed C stack size when refcounts go to zero for a chain of * objects. Outside of DECREF this is always a NULL because DECREF is * processed without side effects (only memory free calls). */ #if defined(DUK_USE_REFERENCE_COUNTING) duk_heaphdr *refzero_list; #endif #if defined(DUK_USE_FINALIZER_SUPPORT) /* Work list for objects to be finalized. */ duk_heaphdr *finalize_list; #if defined(DUK_USE_ASSERTIONS) /* Object whose finalizer is executing right now (no nesting). */ duk_heaphdr *currently_finalizing; #endif #endif /* Freelist for duk_activations and duk_catchers. */ #if defined(DUK_USE_CACHE_ACTIVATION) duk_activation *activation_free; #endif #if defined(DUK_USE_CACHE_CATCHER) duk_catcher *catcher_free; #endif /* Voluntary mark-and-sweep trigger counter. Intentionally signed * because we continue decreasing the value when voluntary GC cannot * run. */ #if defined(DUK_USE_VOLUNTARY_GC) duk_int_t ms_trigger_counter; #endif /* Mark-and-sweep recursion control: too deep recursion causes * multi-pass processing to avoid growing C stack without bound. */ duk_uint_t ms_recursion_depth; /* Mark-and-sweep flags automatically active (used for critical sections). */ duk_small_uint_t ms_base_flags; /* Mark-and-sweep running flag. Prevents re-entry, and also causes * refzero events to be ignored (= objects won't be queued to refzero_list). * * 0: mark-and-sweep not running * 1: mark-and-sweep is running * 2: heap destruction active or debugger active, prevent mark-and-sweep * and refzero processing (but mark-and-sweep not itself running) */ duk_uint_t ms_running; /* Mark-and-sweep prevent count, stacking. Used to avoid M&S side * effects (besides finalizers which are controlled separately) such * as compacting the string table or object property tables. This * is also bumped when ms_running is set to prevent recursive re-entry. * Can also be bumped when mark-and-sweep is not running. */ duk_uint_t ms_prevent_count; /* Finalizer processing prevent count, stacking. Bumped when finalizers * are processed to prevent recursive finalizer processing (first call site * processing finalizers handles all finalizers until the list is empty). * Can also be bumped explicitly to prevent finalizer execution. */ duk_uint_t pf_prevent_count; /* When processing finalize_list, don't actually run finalizers but * queue finalizable objects back to heap_allocated as is. This is * used during heap destruction to deal with finalizers that keep * on creating more finalizable garbage. */ duk_uint_t pf_skip_finalizers; #if defined(DUK_USE_ASSERTIONS) /* Set when we're in a critical path where an error throw would cause * e.g. sandboxing/protected call violations or state corruption. This * is just used for asserts. */ duk_bool_t error_not_allowed; #endif #if defined(DUK_USE_ASSERTIONS) /* Set when heap is still being initialized, helps with writing * some assertions. */ duk_bool_t heap_initializing; #endif /* Marker for detecting internal "double faults", errors thrown when * we're trying to create an error object, see duk_error_throw.c. */ duk_bool_t creating_error; /* Marker for indicating we're calling a user error augmentation * (errCreate/errThrow) function. Errors created/thrown during * such a call are not augmented. */ #if defined(DUK_USE_AUGMENT_ERROR_THROW) || defined(DUK_USE_AUGMENT_ERROR_CREATE) duk_bool_t augmenting_error; #endif /* Longjmp state. */ duk_ljstate lj; /* Heap thread, used internally and for finalization. */ duk_hthread *heap_thread; /* Current running thread. */ duk_hthread *curr_thread; /* Heap level "stash" object (e.g., various reachability roots). */ duk_hobject *heap_object; /* duk_handle_call / duk_handle_safe_call recursion depth limiting */ duk_int_t call_recursion_depth; duk_int_t call_recursion_limit; /* Mix-in value for computing string hashes; should be reasonably unpredictable. */ duk_uint32_t hash_seed; /* Random number state for duk_util_tinyrandom.c. */ #if !defined(DUK_USE_GET_RANDOM_DOUBLE) #if defined(DUK_USE_PREFER_SIZE) || !defined(DUK_USE_64BIT_OPS) duk_uint32_t rnd_state; /* State for Shamir's three-op algorithm */ #else duk_uint64_t rnd_state[2]; /* State for xoroshiro128+ */ #endif #endif /* Counter for unique local symbol creation. */ /* XXX: When 64-bit types are available, it would be more efficient to * use a duk_uint64_t at least for incrementing but maybe also for * string formatting in the Symbol constructor. */ duk_uint32_t sym_counter[2]; /* For manual debugging: instruction count based on executor and * interrupt counter book-keeping. Inspect debug logs to see how * they match up. */ #if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG) duk_int_t inst_count_exec; duk_int_t inst_count_interrupt; #endif /* Debugger state. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) /* Callbacks and udata; dbg_read_cb != NULL is used to indicate attached state. */ duk_debug_read_function dbg_read_cb; /* required, NULL implies detached */ duk_debug_write_function dbg_write_cb; /* required */ duk_debug_peek_function dbg_peek_cb; duk_debug_read_flush_function dbg_read_flush_cb; duk_debug_write_flush_function dbg_write_flush_cb; duk_debug_request_function dbg_request_cb; duk_debug_detached_function dbg_detached_cb; void *dbg_udata; /* The following are only relevant when debugger is attached. */ duk_bool_t dbg_processing; /* currently processing messages or breakpoints: don't enter message processing recursively (e.g. no breakpoints when processing debugger eval) */ duk_bool_t dbg_state_dirty; /* resend state next time executor is about to run */ duk_bool_t dbg_force_restart; /* force executor restart to recheck breakpoints; used to handle function returns (see GH-303) */ duk_bool_t dbg_detaching; /* debugger detaching; used to avoid calling detach handler recursively */ duk_small_uint_t dbg_pause_flags; /* flags for automatic pause behavior */ duk_activation *dbg_pause_act; /* activation related to pause behavior (pause on line change, function entry/exit) */ duk_uint32_t dbg_pause_startline; /* starting line number for line change related pause behavior */ duk_breakpoint dbg_breakpoints[DUK_HEAP_MAX_BREAKPOINTS]; /* breakpoints: [0,breakpoint_count[ gc reachable */ duk_small_uint_t dbg_breakpoint_count; duk_breakpoint *dbg_breakpoints_active[DUK_HEAP_MAX_BREAKPOINTS + 1]; /* currently active breakpoints: NULL term, borrowed pointers */ /* XXX: make active breakpoints actual copies instead of pointers? */ /* These are for rate limiting Status notifications and transport peeking. */ duk_uint_t dbg_exec_counter; /* cumulative opcode execution count (overflows are OK) */ duk_uint_t dbg_last_counter; /* value of dbg_exec_counter when we last did a Date-based check */ duk_double_t dbg_last_time; /* time when status/peek was last done (Date-based rate limit) */ /* Used to support single-byte stream lookahead. */ duk_bool_t dbg_have_next_byte; duk_uint8_t dbg_next_byte; #endif /* DUK_USE_DEBUGGER_SUPPORT */ #if defined(DUK_USE_ASSERTIONS) duk_bool_t dbg_calling_transport; /* transport call in progress, calling into Duktape forbidden */ #endif /* String intern table (weak refs). */ #if defined(DUK_USE_STRTAB_PTRCOMP) duk_uint16_t *strtable16; #else duk_hstring **strtable; #endif duk_uint32_t st_mask; /* mask for lookup, st_size - 1 */ duk_uint32_t st_size; /* stringtable size */ #if (DUK_USE_STRTAB_MINSIZE != DUK_USE_STRTAB_MAXSIZE) duk_uint32_t st_count; /* string count for resize load factor checks */ #endif duk_bool_t st_resizing; /* string table is being resized; avoid recursive resize */ /* String access cache (codepoint offset -> byte offset) for fast string * character looping; 'weak' reference which needs special handling in GC. */ duk_strcache_entry strcache[DUK_HEAP_STRCACHE_SIZE]; #if defined(DUK_USE_LITCACHE_SIZE) /* Literal intern cache. When enabled, strings interned as literals * (e.g. duk_push_literal()) will be pinned and cached for the lifetime * of the heap. */ duk_litcache_entry litcache[DUK_USE_LITCACHE_SIZE]; #endif /* Built-in strings. */ #if defined(DUK_USE_ROM_STRINGS) /* No field needed when strings are in ROM. */ #else #if defined(DUK_USE_HEAPPTR16) duk_uint16_t strs16[DUK_HEAP_NUM_STRINGS]; #else duk_hstring *strs[DUK_HEAP_NUM_STRINGS]; #endif #endif /* Stats. */ #if defined(DUK_USE_DEBUG) duk_int_t stats_exec_opcodes; duk_int_t stats_exec_interrupt; duk_int_t stats_exec_throw; duk_int_t stats_call_all; duk_int_t stats_call_tailcall; duk_int_t stats_call_ecmatoecma; duk_int_t stats_safecall_all; duk_int_t stats_safecall_nothrow; duk_int_t stats_safecall_throw; duk_int_t stats_ms_try_count; duk_int_t stats_ms_skip_count; duk_int_t stats_ms_emergency_count; duk_int_t stats_strtab_intern_hit; duk_int_t stats_strtab_intern_miss; duk_int_t stats_strtab_resize_check; duk_int_t stats_strtab_resize_grow; duk_int_t stats_strtab_resize_shrink; duk_int_t stats_strtab_litcache_hit; duk_int_t stats_strtab_litcache_miss; duk_int_t stats_strtab_litcache_pin; duk_int_t stats_object_realloc_props; duk_int_t stats_object_abandon_array; duk_int_t stats_getownpropdesc_count; duk_int_t stats_getownpropdesc_hit; duk_int_t stats_getownpropdesc_miss; duk_int_t stats_getpropdesc_count; duk_int_t stats_getpropdesc_hit; duk_int_t stats_getpropdesc_miss; duk_int_t stats_getprop_all; duk_int_t stats_getprop_arrayidx; duk_int_t stats_getprop_bufobjidx; duk_int_t stats_getprop_bufferidx; duk_int_t stats_getprop_bufferlen; duk_int_t stats_getprop_stringidx; duk_int_t stats_getprop_stringlen; duk_int_t stats_getprop_proxy; duk_int_t stats_getprop_arguments; duk_int_t stats_putprop_all; duk_int_t stats_putprop_arrayidx; duk_int_t stats_putprop_bufobjidx; duk_int_t stats_putprop_bufferidx; duk_int_t stats_putprop_proxy; duk_int_t stats_getvar_all; duk_int_t stats_putvar_all; duk_int_t stats_envrec_delayedcreate; duk_int_t stats_envrec_create; duk_int_t stats_envrec_newenv; duk_int_t stats_envrec_oldenv; duk_int_t stats_envrec_pushclosure; #endif }; /* * Prototypes */ DUK_INTERNAL_DECL duk_heap *duk_heap_alloc(duk_alloc_function alloc_func, duk_realloc_function realloc_func, duk_free_function free_func, void *heap_udata, duk_fatal_function fatal_func); DUK_INTERNAL_DECL void duk_heap_free(duk_heap *heap); DUK_INTERNAL_DECL void duk_free_hobject(duk_heap *heap, duk_hobject *h); DUK_INTERNAL_DECL void duk_free_hbuffer(duk_heap *heap, duk_hbuffer *h); DUK_INTERNAL_DECL void duk_free_hstring(duk_heap *heap, duk_hstring *h); DUK_INTERNAL_DECL void duk_heap_free_heaphdr_raw(duk_heap *heap, duk_heaphdr *hdr); DUK_INTERNAL_DECL void duk_heap_insert_into_heap_allocated(duk_heap *heap, duk_heaphdr *hdr); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_INTERNAL_DECL void duk_heap_remove_from_heap_allocated(duk_heap *heap, duk_heaphdr *hdr); #endif #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_INTERNAL_DECL void duk_heap_insert_into_finalize_list(duk_heap *heap, duk_heaphdr *hdr); DUK_INTERNAL_DECL void duk_heap_remove_from_finalize_list(duk_heap *heap, duk_heaphdr *hdr); #endif #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL duk_bool_t duk_heap_in_heap_allocated(duk_heap *heap, duk_heaphdr *ptr); #endif #if defined(DUK_USE_INTERRUPT_COUNTER) DUK_INTERNAL_DECL void duk_heap_switch_thread(duk_heap *heap, duk_hthread *new_thr); #endif DUK_INTERNAL_DECL duk_hstring *duk_heap_strtable_intern(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen); DUK_INTERNAL_DECL duk_hstring *duk_heap_strtable_intern_checked(duk_hthread *thr, const duk_uint8_t *str, duk_uint32_t len); #if defined(DUK_USE_LITCACHE_SIZE) DUK_INTERNAL_DECL duk_hstring *duk_heap_strtable_intern_literal_checked(duk_hthread *thr, const duk_uint8_t *str, duk_uint32_t blen); #endif DUK_INTERNAL_DECL duk_hstring *duk_heap_strtable_intern_u32(duk_heap *heap, duk_uint32_t val); DUK_INTERNAL_DECL duk_hstring *duk_heap_strtable_intern_u32_checked(duk_hthread *thr, duk_uint32_t val); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_INTERNAL_DECL void duk_heap_strtable_unlink(duk_heap *heap, duk_hstring *h); #endif DUK_INTERNAL_DECL void duk_heap_strtable_unlink_prev(duk_heap *heap, duk_hstring *h, duk_hstring *prev); DUK_INTERNAL_DECL void duk_heap_strtable_force_resize(duk_heap *heap); DUK_INTERNAL void duk_heap_strtable_free(duk_heap *heap); #if defined(DUK_USE_DEBUG) DUK_INTERNAL void duk_heap_strtable_dump(duk_heap *heap); #endif DUK_INTERNAL_DECL void duk_heap_strcache_string_remove(duk_heap *heap, duk_hstring *h); DUK_INTERNAL_DECL duk_uint_fast32_t duk_heap_strcache_offset_char2byte(duk_hthread *thr, duk_hstring *h, duk_uint_fast32_t char_offset); #if defined(DUK_USE_PROVIDE_DEFAULT_ALLOC_FUNCTIONS) DUK_INTERNAL_DECL void *duk_default_alloc_function(void *udata, duk_size_t size); DUK_INTERNAL_DECL void *duk_default_realloc_function(void *udata, void *ptr, duk_size_t newsize); DUK_INTERNAL_DECL void duk_default_free_function(void *udata, void *ptr); #endif DUK_INTERNAL_DECL void *duk_heap_mem_alloc(duk_heap *heap, duk_size_t size); DUK_INTERNAL_DECL void *duk_heap_mem_alloc_zeroed(duk_heap *heap, duk_size_t size); DUK_INTERNAL_DECL void *duk_heap_mem_alloc_checked(duk_hthread *thr, duk_size_t size); DUK_INTERNAL_DECL void *duk_heap_mem_alloc_checked_zeroed(duk_hthread *thr, duk_size_t size); DUK_INTERNAL_DECL void *duk_heap_mem_realloc(duk_heap *heap, void *ptr, duk_size_t newsize); DUK_INTERNAL_DECL void *duk_heap_mem_realloc_indirect(duk_heap *heap, duk_mem_getptr cb, void *ud, duk_size_t newsize); DUK_INTERNAL_DECL void duk_heap_mem_free(duk_heap *heap, void *ptr); DUK_INTERNAL_DECL void duk_heap_free_freelists(duk_heap *heap); #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_INTERNAL_DECL void duk_heap_run_finalizer(duk_heap *heap, duk_hobject *obj); DUK_INTERNAL_DECL void duk_heap_process_finalize_list(duk_heap *heap); #endif /* DUK_USE_FINALIZER_SUPPORT */ DUK_INTERNAL_DECL void duk_heap_mark_and_sweep(duk_heap *heap, duk_small_uint_t flags); DUK_INTERNAL_DECL duk_uint32_t duk_heap_hashstring(duk_heap *heap, const duk_uint8_t *str, duk_size_t len); #endif /* DUK_HEAP_H_INCLUDED */ /* #include duk_debugger.h */ #if !defined(DUK_DEBUGGER_H_INCLUDED) #define DUK_DEBUGGER_H_INCLUDED /* Debugger protocol version is defined in the public API header. */ /* Initial bytes for markers. */ #define DUK_DBG_IB_EOM 0x00 #define DUK_DBG_IB_REQUEST 0x01 #define DUK_DBG_IB_REPLY 0x02 #define DUK_DBG_IB_ERROR 0x03 #define DUK_DBG_IB_NOTIFY 0x04 /* Other initial bytes. */ #define DUK_DBG_IB_INT4 0x10 #define DUK_DBG_IB_STR4 0x11 #define DUK_DBG_IB_STR2 0x12 #define DUK_DBG_IB_BUF4 0x13 #define DUK_DBG_IB_BUF2 0x14 #define DUK_DBG_IB_UNUSED 0x15 #define DUK_DBG_IB_UNDEFINED 0x16 #define DUK_DBG_IB_NULL 0x17 #define DUK_DBG_IB_TRUE 0x18 #define DUK_DBG_IB_FALSE 0x19 #define DUK_DBG_IB_NUMBER 0x1a #define DUK_DBG_IB_OBJECT 0x1b #define DUK_DBG_IB_POINTER 0x1c #define DUK_DBG_IB_LIGHTFUNC 0x1d #define DUK_DBG_IB_HEAPPTR 0x1e /* The short string/integer initial bytes starting from 0x60 don't have * defines now. */ /* Error codes. */ #define DUK_DBG_ERR_UNKNOWN 0x00 #define DUK_DBG_ERR_UNSUPPORTED 0x01 #define DUK_DBG_ERR_TOOMANY 0x02 #define DUK_DBG_ERR_NOTFOUND 0x03 #define DUK_DBG_ERR_APPLICATION 0x04 /* Commands and notifys initiated by Duktape. */ #define DUK_DBG_CMD_STATUS 0x01 #define DUK_DBG_CMD_UNUSED_2 0x02 /* Duktape 1.x: print notify */ #define DUK_DBG_CMD_UNUSED_3 0x03 /* Duktape 1.x: alert notify */ #define DUK_DBG_CMD_UNUSED_4 0x04 /* Duktape 1.x: log notify */ #define DUK_DBG_CMD_THROW 0x05 #define DUK_DBG_CMD_DETACHING 0x06 #define DUK_DBG_CMD_APPNOTIFY 0x07 /* Commands initiated by debug client. */ #define DUK_DBG_CMD_BASICINFO 0x10 #define DUK_DBG_CMD_TRIGGERSTATUS 0x11 #define DUK_DBG_CMD_PAUSE 0x12 #define DUK_DBG_CMD_RESUME 0x13 #define DUK_DBG_CMD_STEPINTO 0x14 #define DUK_DBG_CMD_STEPOVER 0x15 #define DUK_DBG_CMD_STEPOUT 0x16 #define DUK_DBG_CMD_LISTBREAK 0x17 #define DUK_DBG_CMD_ADDBREAK 0x18 #define DUK_DBG_CMD_DELBREAK 0x19 #define DUK_DBG_CMD_GETVAR 0x1a #define DUK_DBG_CMD_PUTVAR 0x1b #define DUK_DBG_CMD_GETCALLSTACK 0x1c #define DUK_DBG_CMD_GETLOCALS 0x1d #define DUK_DBG_CMD_EVAL 0x1e #define DUK_DBG_CMD_DETACH 0x1f #define DUK_DBG_CMD_DUMPHEAP 0x20 #define DUK_DBG_CMD_GETBYTECODE 0x21 #define DUK_DBG_CMD_APPREQUEST 0x22 #define DUK_DBG_CMD_GETHEAPOBJINFO 0x23 #define DUK_DBG_CMD_GETOBJPROPDESC 0x24 #define DUK_DBG_CMD_GETOBJPROPDESCRANGE 0x25 /* The low 8 bits map directly to duk_hobject.h DUK_PROPDESC_FLAG_xxx. * The remaining flags are specific to the debugger. */ #define DUK_DBG_PROPFLAG_SYMBOL (1U << 8) #define DUK_DBG_PROPFLAG_HIDDEN (1U << 9) #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_INTERNAL_DECL void duk_debug_do_detach(duk_heap *heap); DUK_INTERNAL_DECL duk_bool_t duk_debug_read_peek(duk_hthread *thr); DUK_INTERNAL_DECL void duk_debug_write_flush(duk_hthread *thr); DUK_INTERNAL_DECL void duk_debug_skip_bytes(duk_hthread *thr, duk_size_t length); DUK_INTERNAL_DECL void duk_debug_skip_byte(duk_hthread *thr); DUK_INTERNAL_DECL void duk_debug_read_bytes(duk_hthread *thr, duk_uint8_t *data, duk_size_t length); DUK_INTERNAL_DECL duk_uint8_t duk_debug_read_byte(duk_hthread *thr); DUK_INTERNAL_DECL duk_int32_t duk_debug_read_int(duk_hthread *thr); DUK_INTERNAL_DECL duk_hstring *duk_debug_read_hstring(duk_hthread *thr); /* XXX: exposed duk_debug_read_pointer */ /* XXX: exposed duk_debug_read_buffer */ /* XXX: exposed duk_debug_read_hbuffer */ #if 0 DUK_INTERNAL_DECL duk_heaphdr *duk_debug_read_heapptr(duk_hthread *thr); #endif #if defined(DUK_USE_DEBUGGER_INSPECT) DUK_INTERNAL_DECL duk_heaphdr *duk_debug_read_any_ptr(duk_hthread *thr); #endif DUK_INTERNAL_DECL duk_tval *duk_debug_read_tval(duk_hthread *thr); DUK_INTERNAL_DECL void duk_debug_write_bytes(duk_hthread *thr, const duk_uint8_t *data, duk_size_t length); DUK_INTERNAL_DECL void duk_debug_write_byte(duk_hthread *thr, duk_uint8_t x); DUK_INTERNAL_DECL void duk_debug_write_unused(duk_hthread *thr); DUK_INTERNAL_DECL void duk_debug_write_undefined(duk_hthread *thr); #if defined(DUK_USE_DEBUGGER_INSPECT) DUK_INTERNAL_DECL void duk_debug_write_null(duk_hthread *thr); #endif DUK_INTERNAL_DECL void duk_debug_write_boolean(duk_hthread *thr, duk_uint_t val); DUK_INTERNAL_DECL void duk_debug_write_int(duk_hthread *thr, duk_int32_t x); DUK_INTERNAL_DECL void duk_debug_write_uint(duk_hthread *thr, duk_uint32_t x); DUK_INTERNAL_DECL void duk_debug_write_string(duk_hthread *thr, const char *data, duk_size_t length); DUK_INTERNAL_DECL void duk_debug_write_cstring(duk_hthread *thr, const char *data); DUK_INTERNAL_DECL void duk_debug_write_hstring(duk_hthread *thr, duk_hstring *h); DUK_INTERNAL_DECL void duk_debug_write_buffer(duk_hthread *thr, const char *data, duk_size_t length); DUK_INTERNAL_DECL void duk_debug_write_hbuffer(duk_hthread *thr, duk_hbuffer *h); DUK_INTERNAL_DECL void duk_debug_write_pointer(duk_hthread *thr, void *ptr); #if defined(DUK_USE_DEBUGGER_DUMPHEAP) || defined(DUK_USE_DEBUGGER_INSPECT) DUK_INTERNAL_DECL void duk_debug_write_heapptr(duk_hthread *thr, duk_heaphdr *h); #endif DUK_INTERNAL_DECL void duk_debug_write_hobject(duk_hthread *thr, duk_hobject *obj); DUK_INTERNAL_DECL void duk_debug_write_tval(duk_hthread *thr, duk_tval *tv); #if 0 /* unused */ DUK_INTERNAL_DECL void duk_debug_write_request(duk_hthread *thr, duk_small_uint_t command); #endif DUK_INTERNAL_DECL void duk_debug_write_reply(duk_hthread *thr); DUK_INTERNAL_DECL void duk_debug_write_error_eom(duk_hthread *thr, duk_small_uint_t err_code, const char *msg); DUK_INTERNAL_DECL void duk_debug_write_notify(duk_hthread *thr, duk_small_uint_t command); DUK_INTERNAL_DECL void duk_debug_write_eom(duk_hthread *thr); DUK_INTERNAL_DECL duk_uint_fast32_t duk_debug_curr_line(duk_hthread *thr); DUK_INTERNAL_DECL void duk_debug_send_status(duk_hthread *thr); #if defined(DUK_USE_DEBUGGER_THROW_NOTIFY) DUK_INTERNAL_DECL void duk_debug_send_throw(duk_hthread *thr, duk_bool_t fatal); #endif DUK_INTERNAL_DECL void duk_debug_halt_execution(duk_hthread *thr, duk_bool_t use_prev_pc); DUK_INTERNAL_DECL duk_bool_t duk_debug_process_messages(duk_hthread *thr, duk_bool_t no_block); DUK_INTERNAL_DECL duk_small_int_t duk_debug_add_breakpoint(duk_hthread *thr, duk_hstring *filename, duk_uint32_t line); DUK_INTERNAL_DECL duk_bool_t duk_debug_remove_breakpoint(duk_hthread *thr, duk_small_uint_t breakpoint_index); DUK_INTERNAL_DECL duk_bool_t duk_debug_is_attached(duk_heap *heap); DUK_INTERNAL_DECL duk_bool_t duk_debug_is_paused(duk_heap *heap); DUK_INTERNAL_DECL void duk_debug_set_paused(duk_heap *heap); DUK_INTERNAL_DECL void duk_debug_clear_paused(duk_heap *heap); DUK_INTERNAL_DECL void duk_debug_clear_pause_state(duk_heap *heap); #endif /* DUK_USE_DEBUGGER_SUPPORT */ #endif /* DUK_DEBUGGER_H_INCLUDED */ /* #include duk_debug.h */ /* * Debugging macros, DUK_DPRINT() and its variants in particular. * * DUK_DPRINT() allows formatted debug prints, and supports standard * and Duktape specific formatters. See duk_debug_vsnprintf.c for details. * * DUK_D(x), DUK_DD(x), and DUK_DDD(x) are used together with log macros * for technical reasons. They are concretely used to hide 'x' from the * compiler when the corresponding log level is disabled. This allows * clean builds on non-C99 compilers, at the cost of more verbose code. * Examples: * * DUK_D(DUK_DPRINT("foo")); * DUK_DD(DUK_DDPRINT("foo")); * DUK_DDD(DUK_DDDPRINT("foo")); * * This approach is preferable to the old "double parentheses" hack because * double parentheses make the C99 solution worse: __FILE__ and __LINE__ can * no longer be added transparently without going through globals, which * works poorly with threading. */ #if !defined(DUK_DEBUG_H_INCLUDED) #define DUK_DEBUG_H_INCLUDED #if defined(DUK_USE_DEBUG) #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 0) #define DUK_D(x) x #else #define DUK_D(x) do { } while (0) /* omit */ #endif #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 1) #define DUK_DD(x) x #else #define DUK_DD(x) do { } while (0) /* omit */ #endif #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) #define DUK_DDD(x) x #else #define DUK_DDD(x) do { } while (0) /* omit */ #endif /* * Exposed debug macros: debugging enabled */ #if defined(DUK_USE_VARIADIC_MACROS) /* Note: combining __FILE__, __LINE__, and __func__ into fmt would be * possible compile time, but waste some space with shared function names. */ #define DUK__DEBUG_LOG(lev,...) duk_debug_log((duk_int_t) (lev), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, DUK_FUNC_MACRO, __VA_ARGS__); #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 0) #define DUK_DPRINT(...) DUK__DEBUG_LOG(DUK_LEVEL_DEBUG, __VA_ARGS__) #else #define DUK_DPRINT(...) #endif #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 1) #define DUK_DDPRINT(...) DUK__DEBUG_LOG(DUK_LEVEL_DDEBUG, __VA_ARGS__) #else #define DUK_DDPRINT(...) #endif #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) #define DUK_DDDPRINT(...) DUK__DEBUG_LOG(DUK_LEVEL_DDDEBUG, __VA_ARGS__) #else #define DUK_DDDPRINT(...) #endif #else /* DUK_USE_VARIADIC_MACROS */ #define DUK__DEBUG_STASH(lev) \ (void) DUK_SNPRINTF(duk_debug_file_stash, DUK_DEBUG_STASH_SIZE, "%s", (const char *) DUK_FILE_MACRO), \ (void) (duk_debug_file_stash[DUK_DEBUG_STASH_SIZE - 1] = (char) 0), \ (void) (duk_debug_line_stash = (duk_int_t) DUK_LINE_MACRO), \ (void) DUK_SNPRINTF(duk_debug_func_stash, DUK_DEBUG_STASH_SIZE, "%s", (const char *) DUK_FUNC_MACRO), \ (void) (duk_debug_func_stash[DUK_DEBUG_STASH_SIZE - 1] = (char) 0), \ (void) (duk_debug_level_stash = (lev)) /* Without variadic macros resort to comma expression trickery to handle debug * prints. This generates a lot of harmless warnings. These hacks are not * needed normally because DUK_D() and friends will hide the entire debug log * statement from the compiler. */ #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 0) #define DUK_DPRINT DUK__DEBUG_STASH(DUK_LEVEL_DEBUG), (void) duk_debug_log /* args go here in parens */ #else #define DUK_DPRINT 0 && /* args go here as a comma expression in parens */ #endif #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 1) #define DUK_DDPRINT DUK__DEBUG_STASH(DUK_LEVEL_DDEBUG), (void) duk_debug_log /* args go here in parens */ #else #define DUK_DDPRINT 0 && /* args */ #endif #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) #define DUK_DDDPRINT DUK__DEBUG_STASH(DUK_LEVEL_DDDEBUG), (void) duk_debug_log /* args go here in parens */ #else #define DUK_DDDPRINT 0 && /* args */ #endif #endif /* DUK_USE_VARIADIC_MACROS */ #else /* DUK_USE_DEBUG */ /* * Exposed debug macros: debugging disabled */ #define DUK_D(x) do { } while (0) /* omit */ #define DUK_DD(x) do { } while (0) /* omit */ #define DUK_DDD(x) do { } while (0) /* omit */ #if defined(DUK_USE_VARIADIC_MACROS) #define DUK_DPRINT(...) #define DUK_DDPRINT(...) #define DUK_DDDPRINT(...) #else /* DUK_USE_VARIADIC_MACROS */ #define DUK_DPRINT 0 && /* args go here as a comma expression in parens */ #define DUK_DDPRINT 0 && /* args */ #define DUK_DDDPRINT 0 && /* args */ #endif /* DUK_USE_VARIADIC_MACROS */ #endif /* DUK_USE_DEBUG */ /* * Structs */ #if defined(DUK_USE_DEBUG) struct duk_fixedbuffer { duk_uint8_t *buffer; duk_size_t length; duk_size_t offset; duk_bool_t truncated; }; #endif /* * Prototypes */ #if defined(DUK_USE_DEBUG) DUK_INTERNAL_DECL duk_int_t duk_debug_vsnprintf(char *str, duk_size_t size, const char *format, va_list ap); #if 0 /*unused*/ DUK_INTERNAL_DECL duk_int_t duk_debug_snprintf(char *str, duk_size_t size, const char *format, ...); #endif DUK_INTERNAL_DECL void duk_debug_format_funcptr(char *buf, duk_size_t buf_size, duk_uint8_t *fptr, duk_size_t fptr_size); #if defined(DUK_USE_VARIADIC_MACROS) DUK_INTERNAL_DECL void duk_debug_log(duk_int_t level, const char *file, duk_int_t line, const char *func, const char *fmt, ...); #else /* DUK_USE_VARIADIC_MACROS */ /* parameter passing, not thread safe */ #define DUK_DEBUG_STASH_SIZE 128 #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL char duk_debug_file_stash[DUK_DEBUG_STASH_SIZE]; DUK_INTERNAL_DECL duk_int_t duk_debug_line_stash; DUK_INTERNAL_DECL char duk_debug_func_stash[DUK_DEBUG_STASH_SIZE]; DUK_INTERNAL_DECL duk_int_t duk_debug_level_stash; #endif DUK_INTERNAL_DECL void duk_debug_log(const char *fmt, ...); #endif /* DUK_USE_VARIADIC_MACROS */ DUK_INTERNAL_DECL void duk_fb_put_bytes(duk_fixedbuffer *fb, const duk_uint8_t *buffer, duk_size_t length); DUK_INTERNAL_DECL void duk_fb_put_byte(duk_fixedbuffer *fb, duk_uint8_t x); DUK_INTERNAL_DECL void duk_fb_put_cstring(duk_fixedbuffer *fb, const char *x); DUK_INTERNAL_DECL void duk_fb_sprintf(duk_fixedbuffer *fb, const char *fmt, ...); DUK_INTERNAL_DECL void duk_fb_put_funcptr(duk_fixedbuffer *fb, duk_uint8_t *fptr, duk_size_t fptr_size); DUK_INTERNAL_DECL duk_bool_t duk_fb_is_full(duk_fixedbuffer *fb); #endif /* DUK_USE_DEBUG */ #endif /* DUK_DEBUG_H_INCLUDED */ /* #include duk_error.h */ /* * Error handling macros, assertion macro, error codes. * * There are three types of 'errors': * * 1. Ordinary errors relative to a thread, cause a longjmp, catchable. * 2. Fatal errors relative to a heap, cause fatal handler to be called. * 3. Fatal errors without context, cause the default (not heap specific) * fatal handler to be called. * * Fatal errors without context are used by debug code such as assertions. * By providing a fatal error handler for a Duktape heap, user code can * avoid fatal errors without context in non-debug builds. */ #if !defined(DUK_ERROR_H_INCLUDED) #define DUK_ERROR_H_INCLUDED /* * Error codes: defined in duktape.h * * Error codes are used as a shorthand to throw exceptions from inside * the implementation. The appropriate ECMAScript object is constructed * based on the code. ECMAScript code throws objects directly. The error * codes are defined in the public API header because they are also used * by calling code. */ /* * Normal error * * Normal error is thrown with a longjmp() through the current setjmp() * catchpoint record in the duk_heap. The 'curr_thread' of the duk_heap * identifies the throwing thread. * * Error formatting is usually unnecessary. The error macros provide a * zero argument version (no formatting) and separate macros for small * argument counts. Variadic macros are not used to avoid portability * issues and avoid the need for stash-based workarounds when they're not * available. Vararg calls are avoided for non-formatted error calls * because vararg call sites are larger than normal, and there are a lot * of call sites with no formatting. * * Note that special formatting provided by debug macros is NOT available. * * The _RAW variants allow the caller to specify file and line. This makes * it easier to write checked calls which want to use the call site of the * checked function, not the error macro call inside the checked function. */ #if defined(DUK_USE_VERBOSE_ERRORS) /* Because there are quite many call sites, pack error code (require at most * 8-bit) into a single argument. */ #define DUK_ERROR(thr,err,msg) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (msg)); \ } while (0) #define DUK_ERROR_RAW(thr,file,line,err,msg) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (msg)); \ } while (0) #define DUK_ERROR_FMT1(thr,err,fmt,arg1) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error_fmt((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1)); \ } while (0) #define DUK_ERROR_RAW_FMT1(thr,file,line,err,fmt,arg1) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error_fmt((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1)); \ } while (0) #define DUK_ERROR_FMT2(thr,err,fmt,arg1,arg2) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error_fmt((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2)); \ } while (0) #define DUK_ERROR_RAW_FMT2(thr,file,line,err,fmt,arg1,arg2) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error_fmt((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2)); \ } while (0) #define DUK_ERROR_FMT3(thr,err,fmt,arg1,arg2,arg3) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error_fmt((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2), (arg3)); \ } while (0) #define DUK_ERROR_RAW_FMT3(thr,file,line,err,fmt,arg1,arg2,arg3) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error_fmt((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2), (arg3)); \ } while (0) #define DUK_ERROR_FMT4(thr,err,fmt,arg1,arg2,arg3,arg4) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error_fmt((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2), (arg3), (arg4)); \ } while (0) #define DUK_ERROR_RAW_FMT4(thr,file,line,err,fmt,arg1,arg2,arg3,arg4) do { \ duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \ DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \ duk_err_handle_error_fmt((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2), (arg3), (arg4)); \ } while (0) #else /* DUK_USE_VERBOSE_ERRORS */ #define DUK_ERROR(thr,err,msg) duk_err_handle_error((thr), (err)) #define DUK_ERROR_RAW(thr,file,line,err,msg) duk_err_handle_error((thr), (err)) #define DUK_ERROR_FMT1(thr,err,fmt,arg1) DUK_ERROR((thr),(err),(fmt)) #define DUK_ERROR_RAW_FMT1(thr,file,line,err,fmt,arg1) DUK_ERROR_RAW((thr),(file),(line),(err),(fmt)) #define DUK_ERROR_FMT2(thr,err,fmt,arg1,arg2) DUK_ERROR((thr),(err),(fmt)) #define DUK_ERROR_RAW_FMT2(thr,file,line,err,fmt,arg1,arg2) DUK_ERROR_RAW((thr),(file),(line),(err),(fmt)) #define DUK_ERROR_FMT3(thr,err,fmt,arg1,arg2,arg3) DUK_ERROR((thr),(err),(fmt)) #define DUK_ERROR_RAW_FMT3(thr,file,line,err,fmt,arg1,arg2,arg3) DUK_ERROR_RAW((thr),(file),(line),(err),(fmt)) #define DUK_ERROR_FMT4(thr,err,fmt,arg1,arg2,arg3,arg4) DUK_ERROR((thr),(err),(fmt)) #define DUK_ERROR_RAW_FMT4(thr,file,line,err,fmt,arg1,arg2,arg3,arg4) DUK_ERROR_RAW((thr),(file),(line),(err),(fmt)) #endif /* DUK_USE_VERBOSE_ERRORS */ /* * Fatal error without context * * The macro is an expression to make it compatible with DUK_ASSERT_EXPR(). */ #define DUK_FATAL_WITHOUT_CONTEXT(msg) \ duk_default_fatal_handler(NULL, (msg)) /* * Error throwing helpers * * The goal is to provide verbose and configurable error messages. Call * sites should be clean in source code and compile to a small footprint. * Small footprint is also useful for performance because small cold paths * reduce code cache pressure. Adding macros here only makes sense if there * are enough call sites to get concrete benefits. * * DUK_ERROR_xxx() macros are generic and can be used anywhere. * * DUK_DCERROR_xxx() macros can only be used in Duktape/C functions where * the "return DUK_RET_xxx;" shorthand is available for low memory targets. * The DUK_DCERROR_xxx() macros always either throw or perform a * 'return DUK_RET_xxx' from the calling function. */ #if defined(DUK_USE_VERBOSE_ERRORS) /* Verbose errors with key/value summaries (non-paranoid) or without key/value * summaries (paranoid, for some security sensitive environments), the paranoid * vs. non-paranoid distinction affects only a few specific errors. */ #if defined(DUK_USE_PARANOID_ERRORS) #define DUK_ERROR_REQUIRE_TYPE_INDEX(thr,idx,expectname,lowmemstr) do { \ duk_err_require_type_index((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (idx), (expectname)); \ } while (0) #else /* DUK_USE_PARANOID_ERRORS */ #define DUK_ERROR_REQUIRE_TYPE_INDEX(thr,idx,expectname,lowmemstr) do { \ duk_err_require_type_index((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (idx), (expectname)); \ } while (0) #endif /* DUK_USE_PARANOID_ERRORS */ #define DUK_ERROR_INTERNAL(thr) do { \ duk_err_error_internal((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO); \ } while (0) #define DUK_DCERROR_INTERNAL(thr) do { \ DUK_ERROR_INTERNAL((thr)); \ return 0; \ } while (0) #define DUK_ERROR_ALLOC_FAILED(thr) do { \ duk_err_error_alloc_failed((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO); \ } while (0) #define DUK_ERROR_UNSUPPORTED(thr) do { \ DUK_ERROR((thr), DUK_ERR_ERROR, DUK_STR_UNSUPPORTED); \ } while (0) #define DUK_DCERROR_UNSUPPORTED(thr) do { \ DUK_ERROR_UNSUPPORTED((thr)); \ return 0; \ } while (0) #define DUK_ERROR_ERROR(thr,msg) do { \ duk_err_error((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (msg)); \ } while (0) #define DUK_ERROR_RANGE_INDEX(thr,idx) do { \ duk_err_range_index((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (idx)); \ } while (0) #define DUK_ERROR_RANGE_PUSH_BEYOND(thr) do { \ duk_err_range_push_beyond((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO); \ } while (0) #define DUK_ERROR_RANGE_INVALID_ARGS(thr) do { \ DUK_ERROR_RANGE((thr), DUK_STR_INVALID_ARGS); \ } while (0) #define DUK_DCERROR_RANGE_INVALID_ARGS(thr) do { \ DUK_ERROR_RANGE_INVALID_ARGS((thr)); \ return 0; \ } while (0) #define DUK_ERROR_RANGE_INVALID_COUNT(thr) do { \ DUK_ERROR_RANGE((thr), DUK_STR_INVALID_COUNT); \ } while (0) #define DUK_DCERROR_RANGE_INVALID_COUNT(thr) do { \ DUK_ERROR_RANGE_INVALID_COUNT((thr)); \ return 0; \ } while (0) #define DUK_ERROR_RANGE_INVALID_LENGTH(thr) do { \ DUK_ERROR_RANGE((thr), DUK_STR_INVALID_LENGTH); \ } while (0) #define DUK_DCERROR_RANGE_INVALID_LENGTH(thr) do { \ DUK_ERROR_RANGE_INVALID_LENGTH((thr)); \ return 0; \ } while (0) #define DUK_ERROR_RANGE(thr,msg) do { \ duk_err_range((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (msg)); \ } while (0) #define DUK_ERROR_EVAL(thr,msg) do { \ DUK_ERROR((thr), DUK_ERR_EVAL_ERROR, (msg)); \ } while (0) #define DUK_ERROR_REFERENCE(thr,msg) do { \ DUK_ERROR((thr), DUK_ERR_REFERENCE_ERROR, (msg)); \ } while (0) #define DUK_ERROR_SYNTAX(thr,msg) do { \ DUK_ERROR((thr), DUK_ERR_SYNTAX_ERROR, (msg)); \ } while (0) #define DUK_ERROR_TYPE_INVALID_ARGS(thr) do { \ duk_err_type_invalid_args((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO); \ } while (0) #define DUK_DCERROR_TYPE_INVALID_ARGS(thr) do { \ DUK_ERROR_TYPE_INVALID_ARGS((thr)); \ return 0; \ } while (0) #define DUK_ERROR_TYPE_INVALID_STATE(thr) do { \ duk_err_type_invalid_state((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO); \ } while (0) #define DUK_DCERROR_TYPE_INVALID_STATE(thr) do { \ DUK_ERROR_TYPE_INVALID_STATE((thr)); \ return 0; \ } while (0) #define DUK_ERROR_TYPE_INVALID_TRAP_RESULT(thr) do { \ duk_err_type_invalid_trap_result((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO); \ } while (0) #define DUK_DCERROR_TYPE_INVALID_TRAP_RESULT(thr) do { \ DUK_ERROR_TYPE((thr), DUK_STR_INVALID_TRAP_RESULT); \ } while (0) #define DUK_ERROR_TYPE(thr,msg) do { \ DUK_ERROR((thr), DUK_ERR_TYPE_ERROR, (msg)); \ } while (0) #define DUK_ERROR_URI(thr,msg) do { \ DUK_ERROR((thr), DUK_ERR_URI_ERROR, (msg)); \ } while (0) #else /* DUK_USE_VERBOSE_ERRORS */ /* Non-verbose errors for low memory targets: no file, line, or message. */ #define DUK_ERROR_REQUIRE_TYPE_INDEX(thr,idx,expectname,lowmemstr) do { \ duk_err_type((thr)); \ } while (0) #define DUK_ERROR_INTERNAL(thr) do { \ duk_err_error((thr)); \ } while (0) #define DUK_DCERROR_INTERNAL(thr) do { \ DUK_UNREF((thr)); \ return DUK_RET_ERROR; \ } while (0) #define DUK_ERROR_ALLOC_FAILED(thr) do { \ duk_err_error((thr)); \ } while (0) #define DUK_ERROR_UNSUPPORTED(thr) do { \ duk_err_error((thr)); \ } while (0) #define DUK_DCERROR_UNSUPPORTED(thr) do { \ DUK_UNREF((thr)); \ return DUK_RET_ERROR; \ } while (0) #define DUK_ERROR_ERROR(thr,msg) do { \ duk_err_error((thr)); \ } while (0) #define DUK_ERROR_RANGE_INDEX(thr,idx) do { \ duk_err_range((thr)); \ } while (0) #define DUK_ERROR_RANGE_PUSH_BEYOND(thr) do { \ duk_err_range((thr)); \ } while (0) #define DUK_ERROR_RANGE_INVALID_ARGS(thr) do { \ duk_err_range((thr)); \ } while (0) #define DUK_DCERROR_RANGE_INVALID_ARGS(thr) do { \ DUK_UNREF((thr)); \ return DUK_RET_RANGE_ERROR; \ } while (0) #define DUK_ERROR_RANGE_INVALID_COUNT(thr) do { \ duk_err_range((thr)); \ } while (0) #define DUK_DCERROR_RANGE_INVALID_COUNT(thr) do { \ DUK_UNREF((thr)); \ return DUK_RET_RANGE_ERROR; \ } while (0) #define DUK_ERROR_RANGE_INVALID_LENGTH(thr) do { \ duk_err_range((thr)); \ } while (0) #define DUK_DCERROR_RANGE_INVALID_LENGTH(thr) do { \ DUK_UNREF((thr)); \ return DUK_RET_RANGE_ERROR; \ } while (0) #define DUK_ERROR_RANGE(thr,msg) do { \ duk_err_range((thr)); \ } while (0) #define DUK_ERROR_EVAL(thr,msg) do { \ duk_err_eval((thr)); \ } while (0) #define DUK_ERROR_REFERENCE(thr,msg) do { \ duk_err_reference((thr)); \ } while (0) #define DUK_ERROR_SYNTAX(thr,msg) do { \ duk_err_syntax((thr)); \ } while (0) #define DUK_ERROR_TYPE_INVALID_ARGS(thr) do { \ duk_err_type((thr)); \ } while (0) #define DUK_DCERROR_TYPE_INVALID_ARGS(thr) do { \ DUK_UNREF((thr)); \ return DUK_RET_TYPE_ERROR; \ } while (0) #define DUK_ERROR_TYPE_INVALID_STATE(thr) do { \ duk_err_type((thr)); \ } while (0) #define DUK_DCERROR_TYPE_INVALID_STATE(thr) do { \ duk_err_type((thr)); \ } while (0) #define DUK_ERROR_TYPE_INVALID_TRAP_RESULT(thr) do { \ duk_err_type((thr)); \ } while (0) #define DUK_DCERROR_TYPE_INVALID_TRAP_RESULT(thr) do { \ DUK_UNREF((thr)); \ return DUK_RET_TYPE_ERROR; \ } while (0) #define DUK_ERROR_TYPE_INVALID_TRAP_RESULT(thr) do { \ duk_err_type((thr)); \ } while (0) #define DUK_ERROR_TYPE(thr,msg) do { \ duk_err_type((thr)); \ } while (0) #define DUK_ERROR_URI(thr,msg) do { \ duk_err_uri((thr)); \ } while (0) #endif /* DUK_USE_VERBOSE_ERRORS */ /* * Assert macro: failure causes a fatal error. * * NOTE: since the assert macro doesn't take a heap/context argument, there's * no way to look up a heap/context specific fatal error handler which may have * been given by the application. Instead, assertion failures always use the * internal default fatal error handler; it can be replaced via duk_config.h * and then applies to all Duktape heaps. */ #if defined(DUK_USE_ASSERTIONS) /* The message should be a compile time constant without formatting (less risk); * we don't care about assertion text size because they're not used in production * builds. */ #define DUK_ASSERT(x) do { \ if (!(x)) { \ DUK_FATAL_WITHOUT_CONTEXT("assertion failed: " #x \ " (" DUK_FILE_MACRO ":" DUK_MACRO_STRINGIFY(DUK_LINE_MACRO) ")"); \ } \ } while (0) /* Assertion compatible inside a comma expression, evaluates to void. */ #define DUK_ASSERT_EXPR(x) \ ((void) ((x) ? 0 : (DUK_FATAL_WITHOUT_CONTEXT("assertion failed: " #x \ " (" DUK_FILE_MACRO ":" DUK_MACRO_STRINGIFY(DUK_LINE_MACRO) ")"), 0))) #else /* DUK_USE_ASSERTIONS */ #define DUK_ASSERT(x) do { /* assertion omitted */ } while (0) #define DUK_ASSERT_EXPR(x) ((void) 0) #endif /* DUK_USE_ASSERTIONS */ /* this variant is used when an assert would generate a compile warning by * being always true (e.g. >= 0 comparison for an unsigned value */ #define DUK_ASSERT_DISABLE(x) do { /* assertion disabled */ } while (0) /* * Assertion helpers */ #if defined(DUK_USE_ASSERTIONS) && defined(DUK_USE_REFERENCE_COUNTING) #define DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(h) do { \ DUK_ASSERT((h) == NULL || DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) (h)) > 0); \ } while (0) #define DUK_ASSERT_REFCOUNT_NONZERO_TVAL(tv) do { \ if ((tv) != NULL && DUK_TVAL_IS_HEAP_ALLOCATED((tv))) { \ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(DUK_TVAL_GET_HEAPHDR((tv))) > 0); \ } \ } while (0) #else #define DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(h) /* no refcount check */ #define DUK_ASSERT_REFCOUNT_NONZERO_TVAL(tv) /* no refcount check */ #endif #define DUK_ASSERT_TOP(ctx,n) DUK_ASSERT((duk_idx_t) duk_get_top((ctx)) == (duk_idx_t) (n)) #if defined(DUK_USE_ASSERTIONS) && defined(DUK_USE_PACKED_TVAL) #define DUK_ASSERT_DOUBLE_IS_NORMALIZED(dval) do { \ duk_double_union duk__assert_tmp_du; \ duk__assert_tmp_du.d = (dval); \ DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&duk__assert_tmp_du)); \ } while (0) #else #define DUK_ASSERT_DOUBLE_IS_NORMALIZED(dval) /* nop */ #endif #define DUK_ASSERT_VS_SPACE(thr) \ DUK_ASSERT(thr->valstack_top < thr->valstack_end) /* * Helper to initialize a memory area (e.g. struct) with garbage when * assertions enabled. */ #if defined(DUK_USE_ASSERTIONS) #define DUK_ASSERT_SET_GARBAGE(ptr,size) do { \ duk_memset_unsafe((void *) (ptr), 0x5a, size); \ } while (0) #else #define DUK_ASSERT_SET_GARBAGE(ptr,size) do {} while (0) #endif /* * Helper for valstack space * * Caller of DUK_ASSERT_VALSTACK_SPACE() estimates the number of free stack entries * required for its own use, and any child calls which are not (a) Duktape API calls * or (b) Duktape calls which involve extending the valstack (e.g. getter call). */ #define DUK_VALSTACK_ASSERT_EXTRA 5 /* this is added to checks to allow for Duktape * API calls in addition to function's own use */ #if defined(DUK_USE_ASSERTIONS) #define DUK_ASSERT_VALSTACK_SPACE(thr,n) do { \ DUK_ASSERT((thr) != NULL); \ DUK_ASSERT((thr)->valstack_end - (thr)->valstack_top >= (n) + DUK_VALSTACK_ASSERT_EXTRA); \ } while (0) #else #define DUK_ASSERT_VALSTACK_SPACE(thr,n) /* no valstack space check */ #endif /* * Prototypes */ #if defined(DUK_USE_VERBOSE_ERRORS) DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_handle_error(duk_hthread *thr, const char *filename, duk_uint_t line_and_code, const char *msg)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_handle_error_fmt(duk_hthread *thr, const char *filename, duk_uint_t line_and_code, const char *fmt, ...)); #else /* DUK_USE_VERBOSE_ERRORS */ DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_handle_error(duk_hthread *thr, duk_errcode_t code)); #endif /* DUK_USE_VERBOSE_ERRORS */ #if defined(DUK_USE_VERBOSE_ERRORS) DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_create_and_throw(duk_hthread *thr, duk_errcode_t code, const char *msg, const char *filename, duk_int_t line)); #else DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_create_and_throw(duk_hthread *thr, duk_errcode_t code)); #endif DUK_NORETURN(DUK_INTERNAL_DECL void duk_error_throw_from_negative_rc(duk_hthread *thr, duk_ret_t rc)); #define DUK_AUGMENT_FLAG_NOBLAME_FILELINE (1U << 0) /* if set, don't blame C file/line for .fileName and .lineNumber */ #define DUK_AUGMENT_FLAG_SKIP_ONE (1U << 1) /* if set, skip topmost activation in traceback construction */ #if defined(DUK_USE_AUGMENT_ERROR_CREATE) DUK_INTERNAL_DECL void duk_err_augment_error_create(duk_hthread *thr, duk_hthread *thr_callstack, const char *filename, duk_int_t line, duk_small_uint_t flags); #endif #if defined(DUK_USE_AUGMENT_ERROR_THROW) DUK_INTERNAL_DECL void duk_err_augment_error_throw(duk_hthread *thr); #endif #if defined(DUK_USE_VERBOSE_ERRORS) #if defined(DUK_USE_PARANOID_ERRORS) DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_require_type_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t idx, const char *expect_name)); #else DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_require_type_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t idx, const char *expect_name)); #endif DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_error_internal(duk_hthread *thr, const char *filename, duk_int_t linenumber)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_error_alloc_failed(duk_hthread *thr, const char *filename, duk_int_t linenumber)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_error(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_range_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t idx)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_range_push_beyond(duk_hthread *thr, const char *filename, duk_int_t linenumber)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_range(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_type_invalid_args(duk_hthread *thr, const char *filename, duk_int_t linenumber)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_type_invalid_state(duk_hthread *thr, const char *filename, duk_int_t linenumber)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_type_invalid_trap_result(duk_hthread *thr, const char *filename, duk_int_t linenumber)); #else /* DUK_VERBOSE_ERRORS */ DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_error(duk_hthread *thr)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_range(duk_hthread *thr)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_eval(duk_hthread *thr)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_reference(duk_hthread *thr)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_syntax(duk_hthread *thr)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_type(duk_hthread *thr)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_uri(duk_hthread *thr)); #endif /* DUK_VERBOSE_ERRORS */ DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_longjmp(duk_hthread *thr)); DUK_NORETURN(DUK_INTERNAL_DECL void duk_default_fatal_handler(void *udata, const char *msg)); DUK_INTERNAL_DECL void duk_err_setup_ljstate1(duk_hthread *thr, duk_small_uint_t lj_type, duk_tval *tv_val); #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_INTERNAL_DECL void duk_err_check_debugger_integration(duk_hthread *thr); #endif DUK_INTERNAL_DECL duk_hobject *duk_error_prototype_from_code(duk_hthread *thr, duk_errcode_t err_code); #endif /* DUK_ERROR_H_INCLUDED */ /* #include duk_unicode.h */ /* * Unicode helpers */ #if !defined(DUK_UNICODE_H_INCLUDED) #define DUK_UNICODE_H_INCLUDED /* * UTF-8 / XUTF-8 / CESU-8 constants */ #define DUK_UNICODE_MAX_XUTF8_LENGTH 7 /* up to 36 bit codepoints */ #define DUK_UNICODE_MAX_XUTF8_BMP_LENGTH 3 /* all codepoints up to U+FFFF */ #define DUK_UNICODE_MAX_CESU8_LENGTH 6 /* all codepoints up to U+10FFFF */ #define DUK_UNICODE_MAX_CESU8_BMP_LENGTH 3 /* all codepoints up to U+FFFF */ /* * Useful Unicode codepoints * * Integer constants must be signed to avoid unexpected coercions * in comparisons. */ #define DUK_UNICODE_CP_ZWNJ 0x200cL /* zero-width non-joiner */ #define DUK_UNICODE_CP_ZWJ 0x200dL /* zero-width joiner */ #define DUK_UNICODE_CP_REPLACEMENT_CHARACTER 0xfffdL /* http://en.wikipedia.org/wiki/Replacement_character#Replacement_character */ /* * ASCII character constants * * C character literals like 'x' have a platform specific value and do * not match ASCII (UTF-8) values on e.g. EBCDIC platforms. So, use * these (admittedly awkward) constants instead. These constants must * also have signed values to avoid unexpected coercions in comparisons. * * http://en.wikipedia.org/wiki/ASCII */ #define DUK_ASC_NUL 0x00 #define DUK_ASC_SOH 0x01 #define DUK_ASC_STX 0x02 #define DUK_ASC_ETX 0x03 #define DUK_ASC_EOT 0x04 #define DUK_ASC_ENQ 0x05 #define DUK_ASC_ACK 0x06 #define DUK_ASC_BEL 0x07 #define DUK_ASC_BS 0x08 #define DUK_ASC_HT 0x09 #define DUK_ASC_LF 0x0a #define DUK_ASC_VT 0x0b #define DUK_ASC_FF 0x0c #define DUK_ASC_CR 0x0d #define DUK_ASC_SO 0x0e #define DUK_ASC_SI 0x0f #define DUK_ASC_DLE 0x10 #define DUK_ASC_DC1 0x11 #define DUK_ASC_DC2 0x12 #define DUK_ASC_DC3 0x13 #define DUK_ASC_DC4 0x14 #define DUK_ASC_NAK 0x15 #define DUK_ASC_SYN 0x16 #define DUK_ASC_ETB 0x17 #define DUK_ASC_CAN 0x18 #define DUK_ASC_EM 0x19 #define DUK_ASC_SUB 0x1a #define DUK_ASC_ESC 0x1b #define DUK_ASC_FS 0x1c #define DUK_ASC_GS 0x1d #define DUK_ASC_RS 0x1e #define DUK_ASC_US 0x1f #define DUK_ASC_SPACE 0x20 #define DUK_ASC_EXCLAMATION 0x21 #define DUK_ASC_DOUBLEQUOTE 0x22 #define DUK_ASC_HASH 0x23 #define DUK_ASC_DOLLAR 0x24 #define DUK_ASC_PERCENT 0x25 #define DUK_ASC_AMP 0x26 #define DUK_ASC_SINGLEQUOTE 0x27 #define DUK_ASC_LPAREN 0x28 #define DUK_ASC_RPAREN 0x29 #define DUK_ASC_STAR 0x2a #define DUK_ASC_PLUS 0x2b #define DUK_ASC_COMMA 0x2c #define DUK_ASC_MINUS 0x2d #define DUK_ASC_PERIOD 0x2e #define DUK_ASC_SLASH 0x2f #define DUK_ASC_0 0x30 #define DUK_ASC_1 0x31 #define DUK_ASC_2 0x32 #define DUK_ASC_3 0x33 #define DUK_ASC_4 0x34 #define DUK_ASC_5 0x35 #define DUK_ASC_6 0x36 #define DUK_ASC_7 0x37 #define DUK_ASC_8 0x38 #define DUK_ASC_9 0x39 #define DUK_ASC_COLON 0x3a #define DUK_ASC_SEMICOLON 0x3b #define DUK_ASC_LANGLE 0x3c #define DUK_ASC_EQUALS 0x3d #define DUK_ASC_RANGLE 0x3e #define DUK_ASC_QUESTION 0x3f #define DUK_ASC_ATSIGN 0x40 #define DUK_ASC_UC_A 0x41 #define DUK_ASC_UC_B 0x42 #define DUK_ASC_UC_C 0x43 #define DUK_ASC_UC_D 0x44 #define DUK_ASC_UC_E 0x45 #define DUK_ASC_UC_F 0x46 #define DUK_ASC_UC_G 0x47 #define DUK_ASC_UC_H 0x48 #define DUK_ASC_UC_I 0x49 #define DUK_ASC_UC_J 0x4a #define DUK_ASC_UC_K 0x4b #define DUK_ASC_UC_L 0x4c #define DUK_ASC_UC_M 0x4d #define DUK_ASC_UC_N 0x4e #define DUK_ASC_UC_O 0x4f #define DUK_ASC_UC_P 0x50 #define DUK_ASC_UC_Q 0x51 #define DUK_ASC_UC_R 0x52 #define DUK_ASC_UC_S 0x53 #define DUK_ASC_UC_T 0x54 #define DUK_ASC_UC_U 0x55 #define DUK_ASC_UC_V 0x56 #define DUK_ASC_UC_W 0x57 #define DUK_ASC_UC_X 0x58 #define DUK_ASC_UC_Y 0x59 #define DUK_ASC_UC_Z 0x5a #define DUK_ASC_LBRACKET 0x5b #define DUK_ASC_BACKSLASH 0x5c #define DUK_ASC_RBRACKET 0x5d #define DUK_ASC_CARET 0x5e #define DUK_ASC_UNDERSCORE 0x5f #define DUK_ASC_GRAVE 0x60 #define DUK_ASC_LC_A 0x61 #define DUK_ASC_LC_B 0x62 #define DUK_ASC_LC_C 0x63 #define DUK_ASC_LC_D 0x64 #define DUK_ASC_LC_E 0x65 #define DUK_ASC_LC_F 0x66 #define DUK_ASC_LC_G 0x67 #define DUK_ASC_LC_H 0x68 #define DUK_ASC_LC_I 0x69 #define DUK_ASC_LC_J 0x6a #define DUK_ASC_LC_K 0x6b #define DUK_ASC_LC_L 0x6c #define DUK_ASC_LC_M 0x6d #define DUK_ASC_LC_N 0x6e #define DUK_ASC_LC_O 0x6f #define DUK_ASC_LC_P 0x70 #define DUK_ASC_LC_Q 0x71 #define DUK_ASC_LC_R 0x72 #define DUK_ASC_LC_S 0x73 #define DUK_ASC_LC_T 0x74 #define DUK_ASC_LC_U 0x75 #define DUK_ASC_LC_V 0x76 #define DUK_ASC_LC_W 0x77 #define DUK_ASC_LC_X 0x78 #define DUK_ASC_LC_Y 0x79 #define DUK_ASC_LC_Z 0x7a #define DUK_ASC_LCURLY 0x7b #define DUK_ASC_PIPE 0x7c #define DUK_ASC_RCURLY 0x7d #define DUK_ASC_TILDE 0x7e #define DUK_ASC_DEL 0x7f /* * Miscellaneous */ /* Uppercase A is 0x41, lowercase a is 0x61; OR 0x20 to convert uppercase * to lowercase. */ #define DUK_LOWERCASE_CHAR_ASCII(x) ((x) | 0x20) /* * Unicode tables */ #if defined(DUK_USE_SOURCE_NONBMP) /* * Automatically generated by extract_chars.py, do not edit! */ extern const duk_uint8_t duk_unicode_ids_noa[1116]; #else /* * Automatically generated by extract_chars.py, do not edit! */ extern const duk_uint8_t duk_unicode_ids_noabmp[625]; #endif #if defined(DUK_USE_SOURCE_NONBMP) /* * Automatically generated by extract_chars.py, do not edit! */ extern const duk_uint8_t duk_unicode_ids_m_let_noa[42]; #else /* * Automatically generated by extract_chars.py, do not edit! */ extern const duk_uint8_t duk_unicode_ids_m_let_noabmp[24]; #endif #if defined(DUK_USE_SOURCE_NONBMP) /* * Automatically generated by extract_chars.py, do not edit! */ extern const duk_uint8_t duk_unicode_idp_m_ids_noa[576]; #else /* * Automatically generated by extract_chars.py, do not edit! */ extern const duk_uint8_t duk_unicode_idp_m_ids_noabmp[358]; #endif /* * Automatically generated by extract_caseconv.py, do not edit! */ extern const duk_uint8_t duk_unicode_caseconv_uc[1411]; extern const duk_uint8_t duk_unicode_caseconv_lc[706]; #if defined(DUK_USE_REGEXP_CANON_WORKAROUND) /* * Automatically generated by extract_caseconv.py, do not edit! */ extern const duk_uint16_t duk_unicode_re_canon_lookup[65536]; #endif #if defined(DUK_USE_REGEXP_CANON_BITMAP) /* * Automatically generated by extract_caseconv.py, do not edit! */ #define DUK_CANON_BITMAP_BLKSIZE 32 #define DUK_CANON_BITMAP_BLKSHIFT 5 #define DUK_CANON_BITMAP_BLKMASK 31 extern const duk_uint8_t duk_unicode_re_canon_bitmap[256]; #endif /* * Extern */ /* duk_unicode_support.c */ #if !defined(DUK_SINGLE_FILE) DUK_INTERNAL_DECL const duk_uint8_t duk_unicode_xutf8_markers[7]; DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_digit[2]; DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_white[22]; DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_wordchar[8]; DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_not_digit[4]; DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_not_white[24]; DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_not_wordchar[10]; DUK_INTERNAL_DECL const duk_int8_t duk_is_idchar_tab[128]; #endif /* !DUK_SINGLE_FILE */ /* * Prototypes */ DUK_INTERNAL_DECL duk_small_int_t duk_unicode_get_xutf8_length(duk_ucodepoint_t cp); #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL_DECL duk_small_int_t duk_unicode_get_cesu8_length(duk_ucodepoint_t cp); #endif DUK_INTERNAL_DECL duk_small_int_t duk_unicode_encode_xutf8(duk_ucodepoint_t cp, duk_uint8_t *out); DUK_INTERNAL_DECL duk_small_int_t duk_unicode_encode_cesu8(duk_ucodepoint_t cp, duk_uint8_t *out); DUK_INTERNAL_DECL duk_small_int_t duk_unicode_decode_xutf8(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end, duk_ucodepoint_t *out_cp); DUK_INTERNAL_DECL duk_ucodepoint_t duk_unicode_decode_xutf8_checked(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end); DUK_INTERNAL_DECL duk_size_t duk_unicode_unvalidated_utf8_length(const duk_uint8_t *data, duk_size_t blen); DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_whitespace(duk_codepoint_t cp); DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_line_terminator(duk_codepoint_t cp); DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_identifier_start(duk_codepoint_t cp); DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_identifier_part(duk_codepoint_t cp); DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_letter(duk_codepoint_t cp); DUK_INTERNAL_DECL void duk_unicode_case_convert_string(duk_hthread *thr, duk_bool_t uppercase); #if defined(DUK_USE_REGEXP_SUPPORT) DUK_INTERNAL_DECL duk_codepoint_t duk_unicode_re_canonicalize_char(duk_hthread *thr, duk_codepoint_t cp); DUK_INTERNAL_DECL duk_small_int_t duk_unicode_re_is_wordchar(duk_codepoint_t cp); #endif #endif /* DUK_UNICODE_H_INCLUDED */ /* #include duk_json.h */ /* * Defines for JSON, especially duk_bi_json.c. */ #if !defined(DUK_JSON_H_INCLUDED) #define DUK_JSON_H_INCLUDED /* Encoding/decoding flags */ #define DUK_JSON_FLAG_ASCII_ONLY (1U << 0) /* escape any non-ASCII characters */ #define DUK_JSON_FLAG_AVOID_KEY_QUOTES (1U << 1) /* avoid key quotes when key is an ASCII Identifier */ #define DUK_JSON_FLAG_EXT_CUSTOM (1U << 2) /* extended types: custom encoding */ #define DUK_JSON_FLAG_EXT_COMPATIBLE (1U << 3) /* extended types: compatible encoding */ /* How much stack to require on entry to object/array encode */ #define DUK_JSON_ENC_REQSTACK 32 /* How much stack to require on entry to object/array decode */ #define DUK_JSON_DEC_REQSTACK 32 /* How large a loop detection stack to use */ #define DUK_JSON_ENC_LOOPARRAY 64 /* Encoding state. Heap object references are all borrowed. */ typedef struct { duk_hthread *thr; duk_bufwriter_ctx bw; /* output bufwriter */ duk_hobject *h_replacer; /* replacer function */ duk_hstring *h_gap; /* gap (if empty string, NULL) */ duk_idx_t idx_proplist; /* explicit PropertyList */ duk_idx_t idx_loop; /* valstack index of loop detection object */ duk_small_uint_t flags; duk_small_uint_t flag_ascii_only; duk_small_uint_t flag_avoid_key_quotes; #if defined(DUK_USE_JX) || defined(DUK_USE_JC) duk_small_uint_t flag_ext_custom; duk_small_uint_t flag_ext_compatible; duk_small_uint_t flag_ext_custom_or_compatible; #endif duk_uint_t recursion_depth; duk_uint_t recursion_limit; duk_uint_t mask_for_undefined; /* type bit mask: types which certainly produce 'undefined' */ #if defined(DUK_USE_JX) || defined(DUK_USE_JC) duk_small_uint_t stridx_custom_undefined; duk_small_uint_t stridx_custom_nan; duk_small_uint_t stridx_custom_neginf; duk_small_uint_t stridx_custom_posinf; duk_small_uint_t stridx_custom_function; #endif duk_hobject *visiting[DUK_JSON_ENC_LOOPARRAY]; /* indexed by recursion_depth */ } duk_json_enc_ctx; typedef struct { duk_hthread *thr; const duk_uint8_t *p; const duk_uint8_t *p_start; const duk_uint8_t *p_end; duk_idx_t idx_reviver; duk_small_uint_t flags; #if defined(DUK_USE_JX) || defined(DUK_USE_JC) duk_small_uint_t flag_ext_custom; duk_small_uint_t flag_ext_compatible; duk_small_uint_t flag_ext_custom_or_compatible; #endif duk_int_t recursion_depth; duk_int_t recursion_limit; } duk_json_dec_ctx; #endif /* DUK_JSON_H_INCLUDED */ /* #include duk_js.h */ /* * ECMAScript execution, support primitives. */ #if !defined(DUK_JS_H_INCLUDED) #define DUK_JS_H_INCLUDED /* Flags for call handling. Lowest flags must match bytecode DUK_BC_CALL_FLAG_xxx 1:1. */ #define DUK_CALL_FLAG_TAILCALL (1U << 0) /* setup for a tail call */ #define DUK_CALL_FLAG_CONSTRUCT (1U << 1) /* constructor call (i.e. called as 'new Foo()') */ #define DUK_CALL_FLAG_CALLED_AS_EVAL (1U << 2) /* call was made using the identifier 'eval' */ #define DUK_CALL_FLAG_ALLOW_ECMATOECMA (1U << 3) /* ecma-to-ecma call with executor reuse is possible */ #define DUK_CALL_FLAG_DIRECT_EVAL (1U << 4) /* call is a direct eval call */ #define DUK_CALL_FLAG_CONSTRUCT_PROXY (1U << 5) /* handled via 'construct' proxy trap, check return value invariant(s) */ #define DUK_CALL_FLAG_DEFAULT_INSTANCE_UPDATED (1U << 6) /* prototype of 'default instance' updated, temporary flag in call handling */ /* Flags for duk_js_equals_helper(). */ #define DUK_EQUALS_FLAG_SAMEVALUE (1U << 0) /* use SameValue instead of non-strict equality */ #define DUK_EQUALS_FLAG_STRICT (1U << 1) /* use strict equality instead of non-strict equality */ /* Flags for duk_js_compare_helper(). */ #define DUK_COMPARE_FLAG_NEGATE (1U << 0) /* negate result */ #define DUK_COMPARE_FLAG_EVAL_LEFT_FIRST (1U << 1) /* eval left argument first */ /* conversions, coercions, comparison, etc */ DUK_INTERNAL_DECL duk_bool_t duk_js_toboolean(duk_tval *tv); DUK_INTERNAL_DECL duk_double_t duk_js_tonumber(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL duk_double_t duk_js_tointeger_number(duk_double_t x); DUK_INTERNAL_DECL duk_double_t duk_js_tointeger(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL duk_uint32_t duk_js_touint32(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL duk_int32_t duk_js_toint32(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL duk_uint16_t duk_js_touint16(duk_hthread *thr, duk_tval *tv); DUK_INTERNAL_DECL duk_uarridx_t duk_js_to_arrayindex_string(const duk_uint8_t *str, duk_uint32_t blen); #if !defined(DUK_USE_HSTRING_ARRIDX) DUK_INTERNAL_DECL duk_uarridx_t duk_js_to_arrayindex_hstring_fast_known(duk_hstring *h); DUK_INTERNAL_DECL duk_uarridx_t duk_js_to_arrayindex_hstring_fast(duk_hstring *h); #endif DUK_INTERNAL_DECL duk_bool_t duk_js_equals_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_uint_t flags); DUK_INTERNAL_DECL duk_small_int_t duk_js_data_compare(const duk_uint8_t *buf1, const duk_uint8_t *buf2, duk_size_t len1, duk_size_t len2); DUK_INTERNAL_DECL duk_small_int_t duk_js_string_compare(duk_hstring *h1, duk_hstring *h2); #if 0 /* unused */ DUK_INTERNAL_DECL duk_small_int_t duk_js_buffer_compare(duk_heap *heap, duk_hbuffer *h1, duk_hbuffer *h2); #endif DUK_INTERNAL_DECL duk_bool_t duk_js_compare_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_uint_t flags); DUK_INTERNAL_DECL duk_bool_t duk_js_instanceof(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y); #if defined(DUK_USE_SYMBOL_BUILTIN) DUK_INTERNAL_DECL duk_bool_t duk_js_instanceof_ordinary(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y); #endif DUK_INTERNAL_DECL duk_bool_t duk_js_in(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y); DUK_INTERNAL_DECL duk_small_uint_t duk_js_typeof_stridx(duk_tval *tv_x); /* arithmetic */ DUK_INTERNAL_DECL double duk_js_arith_pow(double x, double y); DUK_INTERNAL_DECL double duk_js_arith_mod(double x, double y); #define duk_js_equals(thr,tv_x,tv_y) \ duk_js_equals_helper((thr), (tv_x), (tv_y), 0) #define duk_js_strict_equals(tv_x,tv_y) \ duk_js_equals_helper(NULL, (tv_x), (tv_y), DUK_EQUALS_FLAG_STRICT) #define duk_js_samevalue(tv_x,tv_y) \ duk_js_equals_helper(NULL, (tv_x), (tv_y), DUK_EQUALS_FLAG_SAMEVALUE) /* E5 Sections 11.8.1, 11.8.5; x < y */ #define duk_js_lessthan(thr,tv_x,tv_y) \ duk_js_compare_helper((thr), (tv_x), (tv_Y), DUK_COMPARE_FLAG_EVAL_LEFT_FIRST) /* E5 Sections 11.8.2, 11.8.5; x > y --> y < x */ #define duk_js_greaterthan(thr,tv_x,tv_y) \ duk_js_compare_helper((thr), (tv_y), (tv_x), 0) /* E5 Sections 11.8.3, 11.8.5; x <= y --> not (x > y) --> not (y < x) */ #define duk_js_lessthanorequal(thr,tv_x,tv_y) \ duk_js_compare_helper((thr), (tv_y), (tv_x), DUK_COMPARE_FLAG_NEGATE) /* E5 Sections 11.8.4, 11.8.5; x >= y --> not (x < y) */ #define duk_js_greaterthanorequal(thr,tv_x,tv_y) \ duk_js_compare_helper((thr), (tv_x), (tv_y), DUK_COMPARE_FLAG_EVAL_LEFT_FIRST | DUK_COMPARE_FLAG_NEGATE) /* identifiers and environment handling */ #if 0 /*unused*/ DUK_INTERNAL duk_bool_t duk_js_hasvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name); #endif DUK_INTERNAL_DECL duk_bool_t duk_js_getvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name, duk_bool_t throw_flag); DUK_INTERNAL_DECL duk_bool_t duk_js_getvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name, duk_bool_t throw_flag); DUK_INTERNAL_DECL void duk_js_putvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name, duk_tval *val, duk_bool_t strict); DUK_INTERNAL_DECL void duk_js_putvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name, duk_tval *val, duk_bool_t strict); #if 0 /*unused*/ DUK_INTERNAL_DECL duk_bool_t duk_js_delvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name); #endif DUK_INTERNAL_DECL duk_bool_t duk_js_delvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name); DUK_INTERNAL_DECL duk_bool_t duk_js_declvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name, duk_tval *val, duk_small_uint_t prop_flags, duk_bool_t is_func_decl); DUK_INTERNAL_DECL void duk_js_init_activation_environment_records_delayed(duk_hthread *thr, duk_activation *act); DUK_INTERNAL_DECL void duk_js_close_environment_record(duk_hthread *thr, duk_hobject *env); DUK_INTERNAL_DECL duk_hobject *duk_create_activation_environment_record(duk_hthread *thr, duk_hobject *func, duk_size_t bottom_byteoff); DUK_INTERNAL_DECL void duk_js_push_closure(duk_hthread *thr, duk_hcompfunc *fun_temp, duk_hobject *outer_var_env, duk_hobject *outer_lex_env, duk_bool_t add_auto_proto); /* call handling */ DUK_INTERNAL_DECL void duk_native_stack_check(duk_hthread *thr); DUK_INTERNAL_DECL duk_int_t duk_handle_call_unprotected(duk_hthread *thr, duk_idx_t idx_func, duk_small_uint_t call_flags); DUK_INTERNAL_DECL duk_int_t duk_handle_call_unprotected_nargs(duk_hthread *thr, duk_idx_t nargs, duk_small_uint_t call_flags); DUK_INTERNAL_DECL duk_int_t duk_handle_safe_call(duk_hthread *thr, duk_safe_call_function func, void *udata, duk_idx_t num_stack_args, duk_idx_t num_stack_res); DUK_INTERNAL_DECL void duk_call_construct_postprocess(duk_hthread *thr, duk_small_uint_t proxy_invariant); #if defined(DUK_USE_VERBOSE_ERRORS) DUK_INTERNAL_DECL void duk_call_setup_propcall_error(duk_hthread *thr, duk_tval *tv_base, duk_tval *tv_key); #endif /* bytecode execution */ DUK_INTERNAL_DECL void duk_js_execute_bytecode(duk_hthread *exec_thr); #endif /* DUK_JS_H_INCLUDED */ /* #include duk_numconv.h */ /* * Number-to-string conversion. The semantics of these is very tightly * bound with the ECMAScript semantics required for call sites. */ #if !defined(DUK_NUMCONV_H_INCLUDED) #define DUK_NUMCONV_H_INCLUDED /* Output a specified number of digits instead of using the shortest * form. Used for toPrecision() and toFixed(). */ #define DUK_N2S_FLAG_FIXED_FORMAT (1U << 0) /* Force exponential format. Used for toExponential(). */ #define DUK_N2S_FLAG_FORCE_EXP (1U << 1) /* If number would need zero padding (for whole number part), use * exponential format instead. E.g. if input number is 12300, 3 * digits are generated ("123"), output "1.23e+4" instead of "12300". * Used for toPrecision(). */ #define DUK_N2S_FLAG_NO_ZERO_PAD (1U << 2) /* Digit count indicates number of fractions (i.e. an absolute * digit index instead of a relative one). Used together with * DUK_N2S_FLAG_FIXED_FORMAT for toFixed(). */ #define DUK_N2S_FLAG_FRACTION_DIGITS (1U << 3) /* * String-to-number conversion */ /* Maximum exponent value when parsing numbers. This is not strictly * compliant as there should be no upper limit, but as we parse the * exponent without a bigint, impose some limit. The limit should be * small enough that multiplying it (or limit-1 to be precise) won't * overflow signed 32-bit integer range. Exponent is only parsed with * radix 10, but with maximum radix (36) a safe limit is: * (10000000*36).toString(16) -> '15752a00' */ #define DUK_S2N_MAX_EXPONENT 10000000L /* Trim white space (= allow leading and trailing whitespace) */ #define DUK_S2N_FLAG_TRIM_WHITE (1U << 0) /* Allow exponent */ #define DUK_S2N_FLAG_ALLOW_EXP (1U << 1) /* Allow trailing garbage (e.g. treat "123foo" as "123) */ #define DUK_S2N_FLAG_ALLOW_GARBAGE (1U << 2) /* Allow leading plus sign */ #define DUK_S2N_FLAG_ALLOW_PLUS (1U << 3) /* Allow leading minus sign */ #define DUK_S2N_FLAG_ALLOW_MINUS (1U << 4) /* Allow 'Infinity' */ #define DUK_S2N_FLAG_ALLOW_INF (1U << 5) /* Allow fraction part */ #define DUK_S2N_FLAG_ALLOW_FRAC (1U << 6) /* Allow naked fraction (e.g. ".123") */ #define DUK_S2N_FLAG_ALLOW_NAKED_FRAC (1U << 7) /* Allow empty fraction (e.g. "123.") */ #define DUK_S2N_FLAG_ALLOW_EMPTY_FRAC (1U << 8) /* Allow empty string to be interpreted as 0 */ #define DUK_S2N_FLAG_ALLOW_EMPTY_AS_ZERO (1U << 9) /* Allow leading zeroes (e.g. "0123" -> "123") */ #define DUK_S2N_FLAG_ALLOW_LEADING_ZERO (1U << 10) /* Allow automatic detection of hex base ("0x" or "0X" prefix), * overrides radix argument and forces integer mode. */ #define DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT (1U << 11) /* Allow automatic detection of legacy octal base ("0n"), * overrides radix argument and forces integer mode. */ #define DUK_S2N_FLAG_ALLOW_AUTO_LEGACY_OCT_INT (1U << 12) /* Allow automatic detection of ES2015 octal base ("0o123"), * overrides radix argument and forces integer mode. */ #define DUK_S2N_FLAG_ALLOW_AUTO_OCT_INT (1U << 13) /* Allow automatic detection of ES2015 binary base ("0b10001"), * overrides radix argument and forces integer mode. */ #define DUK_S2N_FLAG_ALLOW_AUTO_BIN_INT (1U << 14) /* * Prototypes */ DUK_INTERNAL_DECL void duk_numconv_stringify(duk_hthread *thr, duk_small_int_t radix, duk_small_int_t digits, duk_small_uint_t flags); DUK_INTERNAL_DECL void duk_numconv_parse(duk_hthread *thr, duk_small_int_t radix, duk_small_uint_t flags); #endif /* DUK_NUMCONV_H_INCLUDED */ /* #include duk_bi_protos.h */ /* * Prototypes for built-in functions not automatically covered by the * header declarations emitted by genbuiltins.py. */ #if !defined(DUK_BUILTIN_PROTOS_H_INCLUDED) #define DUK_BUILTIN_PROTOS_H_INCLUDED /* Buffer size needed for ISO 8601 formatting. * Accurate value is 32 + 1 for NUL termination: * >>> len('+123456-01-23T12:34:56.123+12:34') * 32 * Include additional space to be safe. */ #define DUK_BI_DATE_ISO8601_BUFSIZE 40 /* Helpers exposed for internal use */ DUK_INTERNAL_DECL void duk_bi_date_timeval_to_parts(duk_double_t d, duk_int_t *parts, duk_double_t *dparts, duk_small_uint_t flags); DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_timeval_from_dparts(duk_double_t *dparts, duk_small_uint_t flags); DUK_INTERNAL_DECL duk_bool_t duk_bi_date_is_leap_year(duk_int_t year); DUK_INTERNAL_DECL duk_bool_t duk_bi_date_timeval_in_valid_range(duk_double_t x); DUK_INTERNAL_DECL duk_bool_t duk_bi_date_year_in_valid_range(duk_double_t year); DUK_INTERNAL_DECL duk_bool_t duk_bi_date_timeval_in_leeway_range(duk_double_t x); /* Built-in providers */ #if defined(DUK_USE_DATE_NOW_GETTIMEOFDAY) DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_gettimeofday(void); #endif #if defined(DUK_USE_DATE_NOW_TIME) DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_time(void); #endif #if defined(DUK_USE_DATE_NOW_WINDOWS) DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_windows(void); #endif #if defined(DUK_USE_DATE_NOW_WINDOWS_SUBMS) DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_windows_subms(void); #endif #if defined(DUK_USE_DATE_TZO_GMTIME_R) || defined(DUK_USE_DATE_TZO_GMTIME_S) || defined(DUK_USE_DATE_TZO_GMTIME) DUK_INTERNAL_DECL duk_int_t duk_bi_date_get_local_tzoffset_gmtime(duk_double_t d); #endif #if defined(DUK_USE_DATE_TZO_WINDOWS) DUK_INTERNAL_DECL duk_int_t duk_bi_date_get_local_tzoffset_windows(duk_double_t d); #endif #if defined(DUK_USE_DATE_TZO_WINDOWS_NO_DST) DUK_INTERNAL_DECL duk_int_t duk_bi_date_get_local_tzoffset_windows_no_dst(duk_double_t d); #endif #if defined(DUK_USE_DATE_PRS_STRPTIME) DUK_INTERNAL_DECL duk_bool_t duk_bi_date_parse_string_strptime(duk_hthread *thr, const char *str); #endif #if defined(DUK_USE_DATE_PRS_GETDATE) DUK_INTERNAL_DECL duk_bool_t duk_bi_date_parse_string_getdate(duk_hthread *thr, const char *str); #endif #if defined(DUK_USE_DATE_FMT_STRFTIME) DUK_INTERNAL_DECL duk_bool_t duk_bi_date_format_parts_strftime(duk_hthread *thr, duk_int_t *parts, duk_int_t tzoffset, duk_small_uint_t flags); #endif #if defined(DUK_USE_GET_MONOTONIC_TIME_CLOCK_GETTIME) DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_monotonic_time_clock_gettime(void); #endif #if defined(DUK_USE_GET_MONOTONIC_TIME_WINDOWS_QPC) DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_monotonic_time_windows_qpc(void); #endif DUK_INTERNAL_DECL void duk_bi_json_parse_helper(duk_hthread *thr, duk_idx_t idx_value, duk_idx_t idx_reviver, duk_small_uint_t flags); DUK_INTERNAL_DECL void duk_bi_json_stringify_helper(duk_hthread *thr, duk_idx_t idx_value, duk_idx_t idx_replacer, duk_idx_t idx_space, duk_small_uint_t flags); DUK_INTERNAL_DECL duk_ret_t duk_textdecoder_decode_utf8_nodejs(duk_hthread *thr); #if defined(DUK_USE_ES6_PROXY) DUK_INTERNAL_DECL void duk_proxy_ownkeys_postprocess(duk_hthread *thr, duk_hobject *h_proxy_target, duk_uint_t flags); #endif #endif /* DUK_BUILTIN_PROTOS_H_INCLUDED */ /* #include duk_selftest.h */ /* * Selftest code */ #if !defined(DUK_SELFTEST_H_INCLUDED) #define DUK_SELFTEST_H_INCLUDED #if defined(DUK_USE_SELF_TESTS) DUK_INTERNAL_DECL duk_uint_t duk_selftest_run_tests(duk_alloc_function alloc_func, duk_realloc_function realloc_func, duk_free_function free_func, void *udata); #endif #endif /* DUK_SELFTEST_H_INCLUDED */ #endif /* DUK_INTERNAL_H_INCLUDED */ #if defined(DUK_USE_COMPUTED_NAN) DUK_INTERNAL double duk_computed_nan; #endif #if defined(DUK_USE_COMPUTED_INFINITY) DUK_INTERNAL double duk_computed_infinity; #endif #if defined(DUK_USE_REPL_FPCLASSIFY) DUK_INTERNAL int duk_repl_fpclassify(double x) { duk_double_union u; duk_uint_fast16_t expt; duk_small_int_t mzero; u.d = x; expt = (duk_uint_fast16_t) (u.us[DUK_DBL_IDX_US0] & 0x7ff0UL); if (expt > 0x0000UL && expt < 0x7ff0UL) { /* expt values [0x001,0x7fe] = normal */ return DUK_FP_NORMAL; } mzero = (u.ui[DUK_DBL_IDX_UI1] == 0 && (u.ui[DUK_DBL_IDX_UI0] & 0x000fffffUL) == 0); if (expt == 0x0000UL) { /* expt 0x000 is zero/subnormal */ if (mzero) { return DUK_FP_ZERO; } else { return DUK_FP_SUBNORMAL; } } else { /* expt 0xfff is infinite/nan */ if (mzero) { return DUK_FP_INFINITE; } else { return DUK_FP_NAN; } } } #endif #if defined(DUK_USE_REPL_SIGNBIT) DUK_INTERNAL int duk_repl_signbit(double x) { duk_double_union u; u.d = x; return (int) (u.uc[DUK_DBL_IDX_UC0] & 0x80UL); } #endif #if defined(DUK_USE_REPL_ISFINITE) DUK_INTERNAL int duk_repl_isfinite(double x) { int c = DUK_FPCLASSIFY(x); if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) { return 0; } else { return 1; } } #endif #if defined(DUK_USE_REPL_ISNAN) DUK_INTERNAL int duk_repl_isnan(double x) { int c = DUK_FPCLASSIFY(x); return (c == DUK_FP_NAN); } #endif #if defined(DUK_USE_REPL_ISINF) DUK_INTERNAL int duk_repl_isinf(double x) { int c = DUK_FPCLASSIFY(x); return (c == DUK_FP_INFINITE); } #endif /* * Debugging macro calls. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_DEBUG) /* * Debugging enabled */ #include #include #include #if !defined(DUK_USE_DEBUG_WRITE) #error debugging enabled (DUK_USE_DEBUG) but DUK_USE_DEBUG_WRITE not defined #endif #define DUK__DEBUG_BUFSIZE DUK_USE_DEBUG_BUFSIZE #if defined(DUK_USE_VARIADIC_MACROS) DUK_INTERNAL void duk_debug_log(duk_int_t level, const char *file, duk_int_t line, const char *func, const char *fmt, ...) { va_list ap; long arg_level; const char *arg_file; long arg_line; const char *arg_func; const char *arg_msg; char buf[DUK__DEBUG_BUFSIZE]; va_start(ap, fmt); duk_memzero((void *) buf, (size_t) DUK__DEBUG_BUFSIZE); duk_debug_vsnprintf(buf, DUK__DEBUG_BUFSIZE - 1, fmt, ap); arg_level = (long) level; arg_file = (const char *) file; arg_line = (long) line; arg_func = (const char *) func; arg_msg = (const char *) buf; DUK_USE_DEBUG_WRITE(arg_level, arg_file, arg_line, arg_func, arg_msg); va_end(ap); } #else /* DUK_USE_VARIADIC_MACROS */ DUK_INTERNAL char duk_debug_file_stash[DUK_DEBUG_STASH_SIZE]; DUK_INTERNAL duk_int_t duk_debug_line_stash; DUK_INTERNAL char duk_debug_func_stash[DUK_DEBUG_STASH_SIZE]; DUK_INTERNAL duk_int_t duk_debug_level_stash; DUK_INTERNAL void duk_debug_log(const char *fmt, ...) { va_list ap; long arg_level; const char *arg_file; long arg_line; const char *arg_func; const char *arg_msg; char buf[DUK__DEBUG_BUFSIZE]; va_start(ap, fmt); duk_memzero((void *) buf, (size_t) DUK__DEBUG_BUFSIZE); duk_debug_vsnprintf(buf, DUK__DEBUG_BUFSIZE - 1, fmt, ap); arg_level = (long) duk_debug_level_stash; arg_file = (const char *) duk_debug_file_stash; arg_line = (long) duk_debug_line_stash; arg_func = (const char *) duk_debug_func_stash; arg_msg = (const char *) buf; DUK_USE_DEBUG_WRITE(arg_level, arg_file, arg_line, arg_func, arg_msg); va_end(ap); } #endif /* DUK_USE_VARIADIC_MACROS */ #else /* DUK_USE_DEBUG */ /* * Debugging disabled */ #endif /* DUK_USE_DEBUG */ /* automatic undefs */ #undef DUK__DEBUG_BUFSIZE /* * Automatically generated by genbuiltins.py, do not edit! */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_ASSERTIONS) #define DUK__REFCINIT(refc) 0 /*h_assert_refcount*/, (refc) /*actual*/ #else #define DUK__REFCINIT(refc) (refc) /*actual*/ #endif #if defined(DUK_USE_ROM_STRINGS) #error ROM support not enabled, rerun configure.py with --rom-support #else /* DUK_USE_ROM_STRINGS */ DUK_INTERNAL const duk_uint8_t duk_strings_data[967] = { 79,40,209,144,168,105,6,78,54,139,89,185,44,48,46,90,120,8,154,140,35,103, 35,113,193,73,5,52,112,180,104,166,135,52,188,4,98,12,27,146,156,80,211,31, 129,115,150,64,52,220,109,24,18,68,156,24,38,67,114,36,55,9,119,151,132, 140,93,18,113,128,153,201,212,201,205,2,248,8,196,24,224,104,82,146,40,224, 193,48,114,168,37,147,196,54,123,28,4,98,12,43,148,67,103,177,192,70,32, 196,121,68,54,123,28,18,192,199,144,124,4,98,12,43,136,108,244,117,184,8, 196,24,95,40,134,207,71,91,128,140,65,133,113,13,158,158,151,1,24,131,11, 229,16,217,233,233,112,17,136,48,206,21,110,4,244,244,184,8,196,24,103,10, 183,2,122,218,156,4,98,12,24,203,112,64,179,113,193,79,8,218,155,131,32, 184,70,212,220,13,10,82,68,252,123,144,217,146,38,228,207,18,0,100,37,64, 178,212,11,161,17,104,162,96,10,200,193,57,165,65,169,16,5,100,81,27,70,18, 32,10,200,68,185,13,116,221,197,184,64,89,57,41,197,13,49,234,5,208,156, 113,87,55,118,147,20,187,56,161,166,92,221,212,73,210,236,226,134,153,115, 119,76,201,203,179,138,26,99,73,212,136,136,164,25,174,137,56,32,72,137, 101,23,52,45,13,34,86,9,79,136,104,201,114,149,96,52,138,134,140,151,75, 226,233,186,120,121,22,39,54,83,141,5,55,68,236,36,164,3,16,225,115,150,64, 52,205,163,2,72,154,83,138,26,99,75,12,11,150,103,5,36,20,211,70,140,133, 67,72,49,241,160,227,81,196,52,168,106,39,132,252,183,136,105,80,212,79,2, 249,110,128,126,88,95,133,109,237,237,237,151,235,127,46,249,119,203,190, 186,206,33,181,2,208,61,190,12,19,34,65,19,81,132,108,228,97,1,107,33,12, 32,45,100,137,64,247,175,9,19,155,41,198,130,155,134,69,146,100,227,226, 231,146,51,192,204,73,140,224,145,221,102,241,68,196,169,248,30,75,12,11, 151,242,233,187,143,138,24,137,162,164,255,253,63,3,201,97,129,114,254,92, 112,75,136,108,166,6,136,159,255,167,224,121,44,48,46,95,203,166,238,74, 113,67,77,201,128,223,255,223,224,121,44,48,46,95,203,145,46,9,205,16,39, 201,62,36,0,192,21,147,255,238,145,39,199,197,211,116,240,242,113,197,78, 214,211,226,233,187,107,105,19,119,37,56,161,166,52,221,212,201,205,36,240, 242,16,96,152,12,178,52,211,56,228,73,150,83,0,148,39,137,75,67,73,198,209, 129,36,85,185,201,196,2,32,193,48,17,160,97,16,84,44,156,104,24,67,189,200, 108,201,19,238,114,96,137,137,50,238,113,164,188,211,185,192,226,100,19, 134,68,110,112,174,139,0,185,31,115,149,4,88,7,159,115,146,117,34,34,35, 115,143,22,146,208,210,19,115,140,3,207,185,202,130,36,109,85,185,194,161, 160,90,50,72,155,115,149,2,232,67,137,204,122,22,66,161,175,164,210,72,199, 130,137,1,50,32,145,143,38,120,186,195,35,106,51,146,230,8,36,77,109,65,38, 226,72,159,191,189,181,70,140,133,222,249,212,227,66,125,245,187,251,219, 77,3,119,190,117,56,208,159,125,110,254,246,210,26,93,239,157,78,52,39,223, 93,191,189,180,212,52,187,223,58,156,104,79,190,187,127,123,104,180,104, 183,190,117,56,208,159,125,102,254,209,104,209,124,234,113,161,62,250,80, 196,128,81,4,9,16,162,4,196,116,9,205,154,27,66,32,100,13,12,98,68,227,33, 65,69,204,195,34,201,50,8,110,33,23,34,28,168,104,22,188,12,174,138,11,70, 138,104,115,68,130,137,13,82,27,41,129,162,35,138,54,146,198,137,39,72,180, 210,178,38,35,146,103,68,139,51,197,214,28,227,131,79,15,35,138,58,130,37, 19,155,41,146,174,64,203,99,161,100,37,145,51,148,75,4,164,66,54,140,49,46, 247,70,103,37,230,70,142,70,67,30,232,204,178,163,201,18,54,139,89,39,26, 16,165,2,228,69,33,143,89,24,70,206,73,67,102,72,148,2,32,214,73,157,224, 18,128,98,29,241,69,65,50,37,241,116,200,41,144,102,125,2,180,8,210,152,38, 129,23,8,34,198, }; #endif /* DUK_USE_ROM_STRINGS */ #if defined(DUK_USE_ROM_OBJECTS) #error ROM support not enabled, rerun configure.py with --rom-support #else /* DUK_USE_ROM_OBJECTS */ /* native functions: 183 */ DUK_INTERNAL const duk_c_function duk_bi_native_functions[183] = { NULL, duk_bi_array_constructor, duk_bi_array_constructor_is_array, duk_bi_array_prototype_concat, duk_bi_array_prototype_indexof_shared, duk_bi_array_prototype_iter_shared, duk_bi_array_prototype_join_shared, duk_bi_array_prototype_pop, duk_bi_array_prototype_push, duk_bi_array_prototype_reduce_shared, duk_bi_array_prototype_reverse, duk_bi_array_prototype_shift, duk_bi_array_prototype_slice, duk_bi_array_prototype_sort, duk_bi_array_prototype_splice, duk_bi_array_prototype_to_string, duk_bi_array_prototype_unshift, duk_bi_arraybuffer_constructor, duk_bi_arraybuffer_isview, duk_bi_boolean_constructor, duk_bi_boolean_prototype_tostring_shared, duk_bi_buffer_compare_shared, duk_bi_buffer_readfield, duk_bi_buffer_slice_shared, duk_bi_buffer_writefield, duk_bi_dataview_constructor, duk_bi_date_constructor, duk_bi_date_constructor_now, duk_bi_date_constructor_parse, duk_bi_date_constructor_utc, duk_bi_date_prototype_get_shared, duk_bi_date_prototype_get_timezone_offset, duk_bi_date_prototype_set_shared, duk_bi_date_prototype_set_time, duk_bi_date_prototype_to_json, duk_bi_date_prototype_toprimitive, duk_bi_date_prototype_tostring_shared, duk_bi_date_prototype_value_of, duk_bi_duktape_object_act, duk_bi_duktape_object_compact, duk_bi_duktape_object_dec, duk_bi_duktape_object_enc, duk_bi_duktape_object_fin, duk_bi_duktape_object_gc, duk_bi_duktape_object_info, duk_bi_error_constructor_shared, duk_bi_error_prototype_filename_getter, duk_bi_error_prototype_filename_setter, duk_bi_error_prototype_linenumber_getter, duk_bi_error_prototype_linenumber_setter, duk_bi_error_prototype_stack_getter, duk_bi_error_prototype_stack_setter, duk_bi_error_prototype_to_string, duk_bi_function_constructor, duk_bi_function_prototype, duk_bi_function_prototype_apply, duk_bi_function_prototype_bind, duk_bi_function_prototype_call, duk_bi_function_prototype_hasinstance, duk_bi_function_prototype_to_string, duk_bi_global_object_decode_uri, duk_bi_global_object_decode_uri_component, duk_bi_global_object_encode_uri, duk_bi_global_object_encode_uri_component, duk_bi_global_object_escape, duk_bi_global_object_eval, duk_bi_global_object_is_finite, duk_bi_global_object_is_nan, duk_bi_global_object_parse_float, duk_bi_global_object_parse_int, duk_bi_global_object_unescape, duk_bi_json_object_parse, duk_bi_json_object_stringify, duk_bi_math_object_clz32, duk_bi_math_object_hypot, duk_bi_math_object_imul, duk_bi_math_object_max, duk_bi_math_object_min, duk_bi_math_object_onearg_shared, duk_bi_math_object_random, duk_bi_math_object_sign, duk_bi_math_object_twoarg_shared, duk_bi_native_function_length, duk_bi_native_function_name, duk_bi_nodejs_buffer_byte_length, duk_bi_nodejs_buffer_concat, duk_bi_nodejs_buffer_constructor, duk_bi_nodejs_buffer_copy, duk_bi_nodejs_buffer_fill, duk_bi_nodejs_buffer_is_buffer, duk_bi_nodejs_buffer_is_encoding, duk_bi_nodejs_buffer_tojson, duk_bi_nodejs_buffer_tostring, duk_bi_nodejs_buffer_write, duk_bi_number_check_shared, duk_bi_number_constructor, duk_bi_number_prototype_to_exponential, duk_bi_number_prototype_to_fixed, duk_bi_number_prototype_to_locale_string, duk_bi_number_prototype_to_precision, duk_bi_number_prototype_to_string, duk_bi_number_prototype_value_of, duk_bi_object_constructor, duk_bi_object_constructor_assign, duk_bi_object_constructor_create, duk_bi_object_constructor_define_properties, duk_bi_object_constructor_define_property, duk_bi_object_constructor_get_own_property_descriptor, duk_bi_object_constructor_is, duk_bi_object_constructor_is_extensible, duk_bi_object_constructor_is_sealed_frozen_shared, duk_bi_object_constructor_keys_shared, duk_bi_object_constructor_prevent_extensions, duk_bi_object_constructor_seal_freeze_shared, duk_bi_object_getprototype_shared, duk_bi_object_prototype_defineaccessor, duk_bi_object_prototype_has_own_property, duk_bi_object_prototype_is_prototype_of, duk_bi_object_prototype_lookupaccessor, duk_bi_object_prototype_property_is_enumerable, duk_bi_object_prototype_to_locale_string, duk_bi_object_prototype_to_string, duk_bi_object_prototype_value_of, duk_bi_object_setprototype_shared, duk_bi_performance_now, duk_bi_pointer_constructor, duk_bi_pointer_prototype_tostring_shared, duk_bi_proxy_constructor, duk_bi_reflect_apply, duk_bi_reflect_construct, duk_bi_reflect_object_delete_property, duk_bi_reflect_object_get, duk_bi_reflect_object_has, duk_bi_reflect_object_set, duk_bi_regexp_constructor, duk_bi_regexp_prototype_exec, duk_bi_regexp_prototype_flags, duk_bi_regexp_prototype_shared_getter, duk_bi_regexp_prototype_test, duk_bi_regexp_prototype_tostring, duk_bi_string_constructor, duk_bi_string_constructor_from_char_code, duk_bi_string_constructor_from_code_point, duk_bi_string_prototype_caseconv_shared, duk_bi_string_prototype_char_at, duk_bi_string_prototype_char_code_at, duk_bi_string_prototype_concat, duk_bi_string_prototype_includes, duk_bi_string_prototype_indexof_shared, duk_bi_string_prototype_locale_compare, duk_bi_string_prototype_match, duk_bi_string_prototype_repeat, duk_bi_string_prototype_replace, duk_bi_string_prototype_search, duk_bi_string_prototype_slice, duk_bi_string_prototype_split, duk_bi_string_prototype_startswith_endswith, duk_bi_string_prototype_substr, duk_bi_string_prototype_substring, duk_bi_string_prototype_to_string, duk_bi_string_prototype_trim, duk_bi_symbol_constructor_shared, duk_bi_symbol_key_for, duk_bi_symbol_toprimitive, duk_bi_symbol_tostring_shared, duk_bi_textdecoder_constructor, duk_bi_textdecoder_prototype_decode, duk_bi_textdecoder_prototype_shared_getter, duk_bi_textencoder_constructor, duk_bi_textencoder_prototype_encode, duk_bi_textencoder_prototype_encoding_getter, duk_bi_thread_constructor, duk_bi_thread_current, duk_bi_thread_resume, duk_bi_thread_yield, duk_bi_type_error_thrower, duk_bi_typedarray_buffer_getter, duk_bi_typedarray_bytelength_getter, duk_bi_typedarray_byteoffset_getter, duk_bi_typedarray_constructor, duk_bi_typedarray_set, duk_bi_uint8array_allocplain, duk_bi_uint8array_plainof, }; #if defined(DUK_USE_DOUBLE_LE) DUK_INTERNAL const duk_uint8_t duk_builtins_data[4251] = { 144,148,105,225,32,68,52,228,126,12,104,201,37,132,52,167,194,138,105,244, 124,57,28,211,57,18,64,52,238,254,44,138,111,171,241,164,19,87,137,30,33, 167,18,145,159,8,211,137,9,225,42,5,240,145,139,163,163,8,211,137,10,228, 64,211,19,132,140,93,29,56,70,156,72,119,34,66,146,36,104,137,194,70,46, 142,172,35,78,36,47,146,195,102,11,240,145,139,163,175,8,211,137,9,228,240, 242,112,145,139,163,179,8,211,137,8,237,34,130,118,49,116,118,225,26,48,0, 1,94,29,201,158,46,183,39,135,147,132,140,93,16,132,76,66,33,8,66,16,132, 33,8,66,26,180,41,97,167,64,150,34,33,154,112,0,1,87,247,35,79,103,237,198, 174,216,47,31,23,95,17,13,31,217,96,211,49,50,53,212,77,141,24,0,0,179,10, 228,240,242,15,128,140,65,128,134,188,0,0,89,167,97,181,224,0,2,205,62,53, 224,0,2,205,66,237,120,0,0,179,81,204,107,192,0,5,154,150,67,94,0,0,44,212, 245,90,240,0,1,102,169,162,215,128,0,11,53,93,150,188,0,0,89,171,111,53, 108,150,163,70,0,0,42,2,249,50,94,124,35,68,225,146,49,13,24,0,0,165,161, 124,153,47,62,12,130,112,201,24,132,56,97,115,16,0,0,0,0,0,0,62,31,243,48, 0,0,0,0,0,0,60,31,242,241,32,26,193,55,132,112,161,156,72,135,26,41,200, 140,114,163,156,201,7,56,79,9,80,47,132,140,93,19,160,43,145,3,76,78,18,49, 116,78,144,238,68,133,36,72,209,19,132,140,93,19,168,47,146,195,102,11,240, 145,139,162,117,132,242,120,121,56,72,197,209,59,2,59,72,160,157,140,93,19, 181,36,242,50,143,36,31,131,162,166,7,144,238,133,227,226,235,224,242,161, 249,18,21,100,20,207,44,199,151,180,122,89,135,152,154,121,153,199,156,158, 121,218,7,158,162,121,250,71,160,166,122,26,135,162,170,122,58,199,164,16, 240,70,68,226,27,51,199,138,120,35,34,112,171,112,38,121,1,124,153,47,62, 17,162,112,201,19,211,11,228,201,121,240,100,19,134,72,158,160,91,201,18, 186,44,3,68,79,122,168,151,115,165,40,21,18,227,65,198,231,200,8,68,184,84, 53,19,38,120,128,145,144,78,25,59,72,163,48,64,144,200,39,12,157,164,80,46, 185,143,115,72,217,230,72,9,35,68,225,147,180,138,51,68,9,17,162,112,201, 218,69,2,235,152,247,52,141,158,108,128,98,72,64,121,51,132,4,81,164,144, 128,242,104,136,0,16,92,38,14,49,39,199,197,211,116,240,242,113,197,231,18, 53,189,116,65,131,18,124,117,155,199,197,207,36,103,142,12,146,20,80,249, 186,60,116,4,204,73,241,214,111,31,23,60,145,158,56,208,48,146,229,146,3,2, 82,65,155,195,94,3,10,36,4,201,196,64,56,100,42,26,78,62,46,121,35,60,113, 152,16,25,10,134,147,143,139,158,72,205,4,151,21,0,73,16,11,230,144,12,88, 144,153,39,52,144,69,241,37,72,217,240,151,153,27,36,57,178,230,16,16,137, 114,68,2,200,62,81,1,8,151,11,23,100,141,229,18,6,34,92,37,230,70,201,1,89, 57,36,2,40,152,151,44,129,83,18,124,117,155,199,197,207,36,103,142,75,12, 11,151,46,89,40,18,37,200,64,12,154,236,252,238,185,23,95,213,1,132,234,0, 194,245,128,14,56,37,199,89,188,124,92,242,70,120,232,16,26,137,113,241, 116,221,60,60,156,113,122,36,10,62,46,121,35,60,113,18,225,27,70,18,32,10, 201,211,32,67,107,104,100,42,26,78,24,147,153,35,181,181,207,64,67,107,104, 100,42,26,78,72,147,153,35,181,181,207,68,16,218,218,91,156,170,63,134,36, 230,72,237,109,116,136,16,218,218,91,156,170,63,146,36,230,72,237,109,116, 137,16,96,128,228,2,6,191,46,3,71,147,68,4,16,22,188,169,240,16,40,104,242, 135,198,171,44,68,65,5,217,231,215,6,231,62,188,8,49,1,3,162,92,4,98,12,41, 7,33,148,53,242,128,97,32,130,3,9,205,16,38,199,198,14,9,0,111,115,225,0,8, 250,72,240,207,128,241,37,73,25,18,40,0,178,58,11,56,192,2,201,104,17,35, 160,9,39,70,114,8,6,147,214,129,18,74,240,30,141,145,208,89,203,62,3,161, 163,37,248,226,185,244,11,88,37,62,33,163,37,248,226,185,252,0,127,255,130, 146,164,142,32,26,1,36,230,18,1,164,7,43,163,194,0,71,128,105,64,216,7,192, 52,192,197,66,230,72,192,52,224,209,32,232,34,68,62,129,113,32,232,34,114, 40,49,231,16,254,0,63,255,208,99,2,140,44,92,206,8,224,143,4,225,147,210, 124,13,44,92,206,9,195,39,30,228,54,126,163,225,200,169,198,133,42,166,191, 246,3,11,251,0,24,71,4,120,9,251,8,10,17,193,30,9,195,39,1,63,105,1,98,112, 201,199,185,13,159,1,63,105,32,48,156,209,2,126,227,224,58,26,50,95,142,47, 192,208,22,176,74,124,67,70,75,241,197,248,26,64,213,184,64,89,56,39,49, 224,137,62,36,2,176,19,17,254,68,3,196,143,88,4,79,162,0,210,32,34,35,253, 72,5,146,208,34,125,144,5,147,214,137,253,208,9,149,3,41,197,13,55,233,0, 185,187,139,117,137,30,8,18,39,172,1,25,187,139,112,128,178,113,110,177,35, 193,2,68,245,128,23,55,114,143,121,35,193,2,68,245,130,8,205,220,91,132,5, 147,148,123,201,30,8,18,39,172,16,18,113,67,63,128,3,68,143,32,39,243,32, 42,83,4,103,46,89,19,63,224,208,16,70,142,92,178,38,127,193,164,8,67,68, 186,12,146,247,154,1,165,64,202,113,252,160,131,32,7,35,167,26,50,235,231, 130,48,179,192,65,148,69,19,214,2,251,85,2,232,72,31,255,255,255,255,255, 253,239,226,122,196,55,106,160,93,9,0,4,0,0,0,0,0,0,3,49,0,0,0,0,0,0,3,225, 252,143,94,233,34,104,169,54,144,210,161,168,158,32,0,0,0,0,0,0,120,63,145, 235,72,96,77,21,38,210,26,84,53,19,196,0,0,0,0,0,0,15,15,240,253,35,228, 133,185,176,0,0,0,0,0,0,44,15,8,117,128,190,212,128,82,109,33,179,33,137, 24,31,255,255,255,255,255,231,232,100,58,196,55,106,64,41,54,144,217,144, 196,140,15,255,255,255,255,255,243,252,49,15,4,100,78,33,179,60,120,167, 130,50,39,10,183,2,103,144,113,8,151,10,134,162,100,221,16,18,137,113,13, 153,12,72,238,137,1,81,46,52,28,110,232,148,53,18,228,128,82,113,13,153,12, 72,238,137,142,73,78,52,0,0,0,0,0,0,0,0,8,58,254,1,12,38,248,134,23,130,0, 60,221,194,162,228,30,244,128,217,187,132,187,220,210,54,104,2,247,132,5, 205,220,124,72,36,73,14,110,252,132,25,128,193,94,8,200,149,200,3,237,38, 43,31,192,54,186,213,128,57,45,56,210,0,0,0,0,0,0,62,31,241,90,251,224,6, 77,220,24,38,78,74,113,67,77,124,16,50,110,228,208,194,114,83,138,26,107, 224,172,37,240,97,41,187,139,112,128,178,112,96,153,57,41,197,13,53,240, 113,41,187,139,112,128,178,114,104,97,57,41,197,13,53,240,128,195,95,8,44, 61,240,132,216,93,33,133,192,128,14,98,79,147,67,9,129,0,44,196,159,11,69, 175,152,32,35,100,33,135,24,147,237,38,34,246,139,95,48,64,70,200,68,8,49, 39,198,57,179,61,144,138,22,98,79,180,152,153,215,54,103,178,17,129,204,73, 240,96,153,44,132,112,163,18,125,164,196,62,130,100,178,18,1,140,73,240,96, 197,144,146,18,98,79,180,152,135,208,98,200,74,8,49,39,195,186,145,149,144, 150,22,98,79,180,152,143,215,82,50,178,19,2,140,73,241,136,109,38,73,89,9, 161,166,36,251,73,137,157,67,105,50,74,200,78,10,49,39,201,16,78,104,229, 100,39,134,152,147,237,38,41,116,130,115,71,43,33,64,60,196,159,24,133,173, 18,32,156,209,202,200,81,18,49,39,218,76,76,234,22,180,72,130,115,71,43,33, 72,68,196,159,38,134,19,46,105,56,226,150,68,157,160,1,228,73,242,104,97, 46,16,31,34,79,140,66,214,137,16,78,104,229,108,169,137,72,147,237,38,38, 117,11,90,36,65,57,163,149,178,168,21,34,79,146,32,156,209,202,218,250,161, 178,36,251,73,138,93,32,156,209,202,218,250,193,82,36,248,196,54,147,36, 173,191,174,27,34,79,180,152,153,212,54,147,36,173,191,176,17,34,79,135, 117,35,43,115,236,133,200,147,237,38,35,245,212,140,173,207,180,15,34,79, 131,4,201,108,173,133,72,147,237,38,33,244,19,37,178,184,17,34,79,140,115, 102,123,107,238,133,200,147,237,38,38,117,205,153,237,175,188,23,34,79,133, 162,215,204,16,17,182,254,248,116,137,62,210,98,47,104,181,243,4,4,109,191, 192,131,152,147,230,8,8,217,12,16,60,137,62,96,128,141,178,193,181,55,136, 200,51,128,114,108,28,100,128,0,0,0,0,0,0,0,12,110,127,32,98,115,249,73, 117,243,249,67,21,159,202,38,47,63,148,86,8,75,144,94,50,1,38,73,79,204,67, 95,231,1,6,128,14,79,129,185,40,249,18,149,181,207,142,199,155,172,248,172, 89,183,207,140,198,137,175,200,0,159,72,10,5,21,220,138,120,74,129,124,36, 98,232,228,74,81,62,160,20,10,107,185,21,114,32,105,137,194,70,46,142,68, 165,19,235,1,64,170,187,145,119,34,66,146,36,104,137,194,70,46,142,68,165, 19,236,1,64,174,187,145,95,37,134,204,23,225,35,23,71,34,82,137,246,128, 160,89,93,200,167,147,195,201,194,70,46,142,68,165,19,238,1,64,182,187,145, 71,105,20,19,177,139,163,145,41,68,16,7,6,15,82,70,72,115,96,0,0,0,0,0,118, 105,160,91,60,165,195,201,194,8,134,149,216,130,0,192,41,224,136,2,48,176, 228,1,149,13,195,15,0,200,209,97,71,128,99,32,176,131,192,113,57,143,0,167, 131,32,230,80,28,202,139,175,237,2,48,189,160,20,1,119,48,87,193,186,129, 89,56,72,197,209,200,193,185,35,23,71,109,13,219,36,98,232,237,156,13,26, 208,211,14,102,19,87,137,91,95,128,0,10,64,24,92,0,0,82,2,53,63,240,49,204, 202,10,14,38,78,44,141,52,207,31,0,0,22,32,129,100,180,8,148,145,78,102, 152,80,113,50,113,100,105,166,120,248,0,0,177,1,65,196,201,199,20,178,36, 227,224,0,2,200,3,6,133,41,35,31,0,0,22,1,44,57,137,62,33,179,216,162,152, 192,131,18,124,162,27,61,138,41,108,32,196,159,16,217,232,235,81,76,104,73, 137,62,81,13,158,142,181,20,184,16,98,79,136,108,244,244,168,166,56,36,196, 159,40,134,207,79,74,138,93,10,49,39,194,173,192,158,158,149,20,188,20,98, 79,133,91,129,61,109,74,41,124,30,68,159,16,217,236,83,108,96,68,137,62,81, 13,158,197,54,182,17,34,79,136,108,244,117,169,182,52,38,68,159,40,134,207, 71,90,155,92,8,145,39,196,54,122,122,84,219,28,19,34,79,148,67,103,167,165, 77,174,133,72,147,225,86,224,79,79,74,155,94,10,145,39,194,173,192,158,182, 165,54,190,206,25,212,35,208,226,100,150,211,201,29,162,44,140,35,103,0,0, 0,0,0,0,3,192,252,206,25,228,35,208,226,100,150,211,201,29,162,44,140,35, 103,0,0,0,0,0,0,3,192,252,206,25,244,35,208,226,100,150,211,201,29,162,44, 140,35,103,0,0,0,0,0,0,3,192,252,206,26,4,35,208,226,100,150,211,201,29, 162,44,140,35,103,0,0,0,0,0,0,0,1,0,206,26,20,35,208,226,100,150,211,201, 29,162,44,140,35,103,0,0,0,0,0,0,0,1,0,206,26,36,35,208,226,100,150,211, 201,29,162,44,140,35,103,0,0,0,0,0,0,0,65,0,206,26,52,35,208,226,100,150, 211,201,29,162,44,140,35,103,0,0,0,0,0,0,0,65,0,206,26,68,35,208,226,100, 150,211,201,29,162,44,140,35,103,0,0,0,0,0,0,0,65,0,206,26,84,35,208,226, 100,150,211,201,29,162,44,140,35,103,0,0,0,0,0,0,0,129,0,195,154,99,16,38, 36,0,251,68,117,179,216,162,128,68,72,1,241,13,158,197,20,150,25,18,0,125, 162,58,217,232,235,117,100,162,136,25,18,0,125,162,58,217,232,235,116,36, 162,145,2,226,64,15,136,108,244,117,186,178,81,73,129,113,32,7,196,54,122, 58,221,9,40,165,64,200,144,3,237,17,214,207,79,75,171,37,20,80,200,144,3, 237,17,214,207,79,75,161,37,20,138,23,18,0,124,67,103,167,165,213,146,138, 77,11,137,0,62,33,179,211,210,232,73,69,42,133,196,128,31,10,183,2,125,89, 40,163,5,196,128,31,10,183,2,125,9,40,164,96,200,144,3,224,221,64,172,157, 89,40,163,134,68,128,31,6,234,5,100,232,73,69,35,133,68,128,31,104,142,182, 125,89,40,180,0,168,144,3,237,17,214,207,161,37,22,144,19,18,0,124,67,103, 213,146,139,80,9,137,0,62,33,179,232,73,69,172,5,90,40,153,59,68,117,179, 216,166,192,77,162,137,147,136,108,246,41,180,176,219,69,19,39,104,142,182, 122,58,221,89,41,178,6,218,40,153,59,68,117,179,209,214,232,73,77,162,6,90, 40,153,56,134,207,71,91,171,37,54,152,25,104,162,100,226,27,61,29,110,132, 148,218,160,109,162,137,147,180,71,91,61,61,46,172,148,217,67,109,20,76, 157,162,58,217,233,233,116,36,166,209,67,45,20,76,156,67,103,167,165,213, 146,155,77,12,180,81,50,113,13,158,158,151,66,74,109,84,50,209,68,201,194, 173,192,159,86,74,108,193,150,138,38,78,21,110,4,250,18,83,104,193,182,138, 38,78,13,212,10,201,213,146,155,56,109,162,137,147,131,117,2,178,116,36, 166,209,194,237,20,76,157,162,58,217,245,100,167,16,2,237,20,76,157,162,58, 217,244,36,167,18,2,173,20,76,156,67,103,213,146,156,80,10,180,81,50,113, 13,159,66,74,113,97,175,220,48,216,109,192,4,42,22,189,163,0,196,133,0,185, 80,32,28,78,99,193,18,80,36,4,19,159,141,156,0,178,90,4,74,73,0,22,209,68, 201,185,129,4,2,8,3,132,64,60,36,6,149,113,72,176,171,240,84,0,157,91,116, 116,32,11,42,218,221,216,181,129,32,3,234,219,165,3,188,231,235,249,8,187, 152,252,47,86,227,105,18,7,244,17,91,42,56,175,185,248,110,173,198,209,208, 36,0,238,82,97,87,188,189,179,240,93,122,32,12,22,162,42,125,144,132,160,7, 236,161,25,232,237,105,64,205,59,127,102,158,160,230,63,11,217,66,51,210, 129,154,118,254,205,61,65,236,127,171,197,34,168,48,6,90,162,1,0,39,75,84, 72,8,9,33,186,162,80,64,76,13,213,19,2,130,96,110,150,181,0,65,6,51,213,20, 128,65,17,11,213,19,130,137,121,211,210,210,144,6,39,75,84,80,0,201,119, 234,138,8,41,86,231,71,84,80,129,79,135,186,122,101,224,34,25,69,233,208,3, 91,141,170,40,96,139,113,180,181,69,36,21,110,54,142,134,168,165,1,176,23, 212,47,0,216,134,234,87,128,111,117,181,168,128,209,3,70,230,106,192,5,139, 168,209,234,138,32,36,144,102,235,8,3,146,27,170,40,160,146,132,103,170,40, 192,115,3,117,69,28,22,113,163,69,170,41,103,1,66,188,17,145,52,104,4,202, 113,67,76,130,227,72,194,13,240,108,0,0,83,96,0,2,185,0,104,146,84,97,48,0, 1,90,192,56,169,24,145,179,192,0,5,96,8,56,16,32,128,56,18,52,125,198,86, 147,186,140,28,50,21,13,39,31,23,60,145,158,56,204,141,47,121,6,155,190, 188,24,49,39,199,89,188,124,92,242,70,120,224,201,33,69,15,155,163,199,68, 14,49,39,199,197,211,116,240,242,113,197,231,18,180,254,4,3,17,46,18,243, 35,100,128,172,156,146,70,163,150,76,34,248,146,164,108,248,75,204,141,146, 28,217,115,9,27,79,11,241,173,235,162,160,224,200,2,206,9,113,13,148,192, 209,18,22,164,146,37,193,57,162,4,249,39,196,128,24,2,178,66,213,136,68, 201,16,77,209,131,31,192,242,88,96,92,191,151,34,100,136,38,232,255,252,92, 221,199,197,12,68,209,82,66,212,11,155,185,41,197,13,55,38,3,66,213,47,131, 250,72,12,162,99,133,116,127,196,32,225,1,3,34,92,170,9,105,164,32,225,64, 131,156,1,193,133,7,19,39,22,70,154,103,143,128,0,11,16,20,28,76,156,113, 75,34,78,62,0,0,44,128,48,104,82,146,49,240,0,1,96,11,180,192,0,5,162,1,18, 160,65,24,131,20,145,25,188,48,132,122,28,76,146,218,121,35,180,69,145,132, 108,224,0,0,0,0,0,0,120,31,153,188,56,132,122,28,76,146,218,121,35,180,69, 145,132,108,224,0,0,0,0,0,0,120,31,168,160,45,110,23,30,176,33,184,0,0,181, 32,29,235,2,27,199,23,0,0,22,196,51,120,129,8,244,56,153,37,180,242,71,104, 139,35,8,217,192,0,0,0,0,0,0,240,63,51,120,145,8,244,56,153,37,180,242,71, 104,139,35,8,217,192,0,0,0,0,0,0,0,64,51,120,161,8,244,56,153,37,180,242, 71,104,139,35,8,217,192,0,0,0,0,0,0,0,64,51,120,177,8,244,56,153,37,180, 242,71,104,139,35,8,217,192,0,0,0,0,0,0,16,64,51,120,193,8,244,56,153,37, 180,242,71,104,139,35,8,217,192,0,0,0,0,0,0,16,64,51,120,209,8,244,56,153, 37,180,242,71,104,139,35,8,217,192,0,0,0,0,0,0,16,64,51,120,225,8,244,56, 153,37,180,242,71,104,139,35,8,217,192,0,0,0,0,0,0,32,64,32,227,194,0,97, 57,162,4,246,40,5,34,92,35,68,225,161,166,219,16,16,137,112,52,41,73,29, 169,1,65,196,201,197,145,166,153,246,8,3,137,204,120,34,74,8,200,58,128,28, 211,160,130,52,78,26,26,110,248,0,0,170,4,12,70,137,195,38,0,0,42,68,159,7, 84,3,154,150,16,70,137,195,67,77,223,0,0,20,224,20,160,152,23,223,0,0,20, 226,9,65,154,232,147,161,115,59,224,0,2,156,84,12,50,9,195,38,0,0,41,133, 30,224,32,54,186,221,128,60, }; #elif defined(DUK_USE_DOUBLE_BE) DUK_INTERNAL const duk_uint8_t duk_builtins_data[4251] = { 144,148,105,225,32,68,52,228,126,12,104,201,37,132,52,167,194,138,105,244, 124,57,28,211,57,18,64,52,238,254,44,138,111,171,241,164,19,87,137,30,33, 167,18,145,159,8,211,137,9,225,42,5,240,145,139,163,163,8,211,137,10,228, 64,211,19,132,140,93,29,56,70,156,72,119,34,66,146,36,104,137,194,70,46, 142,172,35,78,36,47,146,195,102,11,240,145,139,163,175,8,211,137,9,228,240, 242,112,145,139,163,179,8,211,137,8,237,34,130,118,49,116,118,225,26,48,0, 1,94,29,201,158,46,183,39,135,147,132,140,93,16,132,76,66,33,8,66,16,132, 33,8,66,26,180,41,97,167,64,150,34,33,154,112,0,1,87,247,35,79,103,237,198, 174,216,47,31,23,95,17,13,31,217,96,211,49,50,53,212,77,141,24,0,0,179,10, 228,240,242,15,128,140,65,128,134,188,0,0,89,167,97,181,224,0,2,205,62,53, 224,0,2,205,66,237,120,0,0,179,81,204,107,192,0,5,154,150,67,94,0,0,44,212, 245,90,240,0,1,102,169,162,215,128,0,11,53,93,150,188,0,0,89,171,111,53, 108,150,163,70,0,0,42,2,249,50,94,124,35,68,225,146,49,13,24,0,0,165,161, 124,153,47,62,12,130,112,201,24,132,56,97,115,16,31,254,0,0,0,0,0,0,51,48, 31,252,0,0,0,0,0,0,50,241,32,26,193,55,132,112,161,156,72,135,26,41,200, 140,114,163,156,201,7,56,79,9,80,47,132,140,93,19,160,43,145,3,76,78,18,49, 116,78,144,238,68,133,36,72,209,19,132,140,93,19,168,47,146,195,102,11,240, 145,139,162,117,132,242,120,121,56,72,197,209,59,2,59,72,160,157,140,93,19, 181,36,242,50,143,36,31,131,162,166,7,144,238,133,227,226,235,224,242,161, 249,18,21,100,20,207,44,199,151,180,122,89,135,152,154,121,153,199,156,158, 121,218,7,158,162,121,250,71,160,166,122,26,135,162,170,122,58,199,164,16, 240,70,68,226,27,51,199,138,120,35,34,112,171,112,38,121,1,124,153,47,62, 17,162,112,201,19,211,11,228,201,121,240,100,19,134,72,158,160,91,201,18, 186,44,3,68,79,122,168,151,115,165,40,21,18,227,65,198,231,200,8,68,184,84, 53,19,38,120,128,145,144,78,25,59,72,163,48,64,144,200,39,12,157,164,80,46, 185,143,115,72,217,230,72,9,35,68,225,147,180,138,51,68,9,17,162,112,201, 218,69,2,235,152,247,52,141,158,108,128,98,72,64,121,51,132,4,81,164,144, 128,242,104,136,0,16,92,38,14,49,39,199,197,211,116,240,242,113,197,231,18, 53,189,116,65,131,18,124,117,155,199,197,207,36,103,142,12,146,20,80,249, 186,60,116,4,204,73,241,214,111,31,23,60,145,158,56,208,48,146,229,146,3,2, 82,65,155,195,94,3,10,36,4,201,196,64,56,100,42,26,78,62,46,121,35,60,113, 152,16,25,10,134,147,143,139,158,72,205,4,151,21,0,73,16,11,230,144,12,88, 144,153,39,52,144,69,241,37,72,217,240,151,153,27,36,57,178,230,16,16,137, 114,68,2,200,62,81,1,8,151,11,23,100,141,229,18,6,34,92,37,230,70,201,1,89, 57,36,2,40,152,151,44,129,83,18,124,117,155,199,197,207,36,103,142,75,12, 11,151,46,89,40,18,37,200,64,12,154,236,252,238,185,23,95,213,1,132,234,0, 194,245,128,14,56,37,199,89,188,124,92,242,70,120,232,16,26,137,113,241, 116,221,60,60,156,113,122,36,10,62,46,121,35,60,113,18,225,27,70,18,32,10, 201,211,32,67,107,104,100,42,26,78,24,147,153,35,181,181,207,64,67,107,104, 100,42,26,78,72,147,153,35,181,181,207,68,16,218,218,91,156,170,63,134,36, 230,72,237,109,116,136,16,218,218,91,156,170,63,146,36,230,72,237,109,116, 137,16,96,128,228,2,6,191,46,3,71,147,68,4,16,22,188,169,240,16,40,104,242, 135,198,171,44,68,65,5,217,231,215,6,231,62,188,8,49,1,3,162,92,4,98,12,41, 7,33,148,53,242,128,97,32,130,3,9,205,16,38,199,198,14,9,0,111,115,225,0,8, 250,72,240,207,128,241,37,73,25,18,40,0,178,58,11,56,192,2,201,104,17,35, 160,9,39,70,114,8,6,147,214,129,18,74,240,30,141,145,208,89,203,62,3,161, 163,37,248,226,185,244,11,88,37,62,33,163,37,248,226,185,252,0,127,255,130, 146,164,142,32,26,1,36,230,18,1,164,7,43,163,194,0,71,128,105,64,216,7,192, 52,192,197,66,230,72,192,52,224,209,32,232,34,68,62,129,113,32,232,34,114, 40,49,231,16,254,0,63,255,208,99,2,140,44,92,206,8,224,143,4,225,147,210, 124,13,44,92,206,9,195,39,30,228,54,126,163,225,200,169,198,133,42,166,191, 246,3,11,251,0,24,71,4,120,9,251,8,10,17,193,30,9,195,39,1,63,105,1,98,112, 201,199,185,13,159,1,63,105,32,48,156,209,2,126,227,224,58,26,50,95,142,47, 192,208,22,176,74,124,67,70,75,241,197,248,26,64,213,184,64,89,56,39,49, 224,137,62,36,2,176,19,17,254,68,3,196,143,88,4,79,162,0,210,32,34,35,253, 72,5,146,208,34,125,144,5,147,214,137,253,208,9,149,3,41,197,13,55,233,0, 185,187,139,117,137,30,8,18,39,172,1,25,187,139,112,128,178,113,110,177,35, 193,2,68,245,128,23,55,114,143,121,35,193,2,68,245,130,8,205,220,91,132,5, 147,148,123,201,30,8,18,39,172,16,18,113,67,63,128,3,68,143,32,39,243,32, 42,83,4,103,46,89,19,63,224,208,16,70,142,92,178,38,127,193,164,8,67,68, 186,12,146,247,154,1,165,64,202,113,252,160,131,32,7,35,167,26,50,235,231, 130,48,179,192,65,148,69,19,214,2,251,85,2,232,72,15,253,255,255,255,255, 255,255,226,122,196,55,106,160,93,9,0,0,0,0,0,0,0,0,7,49,1,255,224,0,0,0,0, 0,0,143,94,233,34,104,169,54,144,210,161,168,158,32,63,248,0,0,0,0,0,0,17, 235,72,96,77,21,38,210,26,84,53,19,196,15,255,0,0,0,0,0,0,0,253,35,228,133, 185,176,15,44,0,0,0,0,0,0,8,117,128,190,212,128,82,109,33,179,33,137,24,8, 103,255,255,255,255,255,255,228,58,196,55,106,64,41,54,144,217,144,196,140, 12,51,255,255,255,255,255,255,241,15,4,100,78,33,179,60,120,167,130,50,39, 10,183,2,103,144,113,8,151,10,134,162,100,221,16,18,137,113,13,153,12,72, 238,137,1,81,46,52,28,110,232,148,53,18,228,128,82,113,13,153,12,72,238, 137,142,73,78,52,0,0,0,0,0,0,0,0,8,58,254,1,12,38,248,134,23,130,0,60,221, 194,162,228,30,244,128,217,187,132,187,220,210,54,104,2,247,132,5,205,220, 124,72,36,73,14,110,252,132,25,128,193,94,8,200,149,200,3,237,38,43,31,192, 54,186,213,128,57,45,56,210,31,254,0,0,0,0,0,0,49,90,251,224,6,77,220,24, 38,78,74,113,67,77,124,16,50,110,228,208,194,114,83,138,26,107,224,172,37, 240,97,41,187,139,112,128,178,112,96,153,57,41,197,13,53,240,113,41,187, 139,112,128,178,114,104,97,57,41,197,13,53,240,128,195,95,8,44,61,240,132, 216,93,33,133,192,128,14,98,79,147,67,9,129,0,44,196,159,11,69,175,152,32, 35,100,33,135,24,147,237,38,34,246,139,95,48,64,70,200,68,8,49,39,198,57, 179,61,144,138,22,98,79,180,152,153,215,54,103,178,17,129,204,73,240,96, 153,44,132,112,163,18,125,164,196,62,130,100,178,18,1,140,73,240,96,197, 144,146,18,98,79,180,152,135,208,98,200,74,8,49,39,195,186,145,149,144,150, 22,98,79,180,152,143,215,82,50,178,19,2,140,73,241,136,109,38,73,89,9,161, 166,36,251,73,137,157,67,105,50,74,200,78,10,49,39,201,16,78,104,229,100, 39,134,152,147,237,38,41,116,130,115,71,43,33,64,60,196,159,24,133,173,18, 32,156,209,202,200,81,18,49,39,218,76,76,234,22,180,72,130,115,71,43,33,72, 68,196,159,38,134,19,46,105,56,226,150,68,157,160,1,228,73,242,104,97,46, 16,31,34,79,140,66,214,137,16,78,104,229,108,169,137,72,147,237,38,38,117, 11,90,36,65,57,163,149,178,168,21,34,79,146,32,156,209,202,218,250,161,178, 36,251,73,138,93,32,156,209,202,218,250,193,82,36,248,196,54,147,36,173, 191,174,27,34,79,180,152,153,212,54,147,36,173,191,176,17,34,79,135,117,35, 43,115,236,133,200,147,237,38,35,245,212,140,173,207,180,15,34,79,131,4, 201,108,173,133,72,147,237,38,33,244,19,37,178,184,17,34,79,140,115,102, 123,107,238,133,200,147,237,38,38,117,205,153,237,175,188,23,34,79,133,162, 215,204,16,17,182,254,248,116,137,62,210,98,47,104,181,243,4,4,109,191,192, 131,152,147,230,8,8,217,12,16,60,137,62,96,128,141,178,193,181,55,136,200, 51,128,114,108,28,100,128,0,0,0,0,0,0,0,12,110,127,32,98,115,249,73,117, 243,249,67,21,159,202,38,47,63,148,86,8,75,144,94,50,1,38,73,79,204,67,95, 231,1,6,128,14,79,129,185,40,249,18,149,181,207,142,199,155,172,248,172,89, 183,207,140,198,137,175,200,0,159,72,10,5,21,220,138,120,74,129,124,36,98, 232,228,74,81,62,160,20,10,107,185,21,114,32,105,137,194,70,46,142,68,165, 19,235,1,64,170,187,145,119,34,66,146,36,104,137,194,70,46,142,68,165,19, 236,1,64,174,187,145,95,37,134,204,23,225,35,23,71,34,82,137,246,128,160, 89,93,200,167,147,195,201,194,70,46,142,68,165,19,238,1,64,182,187,145,71, 105,20,19,177,139,163,145,41,68,16,7,6,15,82,70,72,115,96,32,105,246,0,0,0, 0,0,91,60,165,195,201,194,8,134,149,216,130,0,192,41,224,136,2,48,176,228, 1,149,13,195,15,0,200,209,97,71,128,99,32,176,131,192,113,57,143,0,167,131, 32,230,80,28,202,139,175,237,2,48,189,160,20,1,119,48,87,193,186,129,89,56, 72,197,209,200,193,185,35,23,71,109,13,219,36,98,232,237,156,13,26,208,211, 14,102,19,87,137,91,95,128,0,10,64,24,92,0,0,82,2,53,63,240,49,204,202,10, 14,38,78,44,141,52,207,31,0,0,22,32,129,100,180,8,148,145,78,102,152,80, 113,50,113,100,105,166,120,248,0,0,177,1,65,196,201,199,20,178,36,227,224, 0,2,200,3,6,133,41,35,31,0,0,22,1,44,57,137,62,33,179,216,162,152,192,131, 18,124,162,27,61,138,41,108,32,196,159,16,217,232,235,81,76,104,73,137,62, 81,13,158,142,181,20,184,16,98,79,136,108,244,244,168,166,56,36,196,159,40, 134,207,79,74,138,93,10,49,39,194,173,192,158,158,149,20,188,20,98,79,133, 91,129,61,109,74,41,124,30,68,159,16,217,236,83,108,96,68,137,62,81,13,158, 197,54,182,17,34,79,136,108,244,117,169,182,52,38,68,159,40,134,207,71,90, 155,92,8,145,39,196,54,122,122,84,219,28,19,34,79,148,67,103,167,165,77, 174,133,72,147,225,86,224,79,79,74,155,94,10,145,39,194,173,192,158,182, 165,54,190,206,25,212,35,208,226,100,150,211,201,29,162,44,140,35,103,0, 255,192,0,0,0,0,0,0,206,25,228,35,208,226,100,150,211,201,29,162,44,140,35, 103,0,255,192,0,0,0,0,0,0,206,25,244,35,208,226,100,150,211,201,29,162,44, 140,35,103,0,255,192,0,0,0,0,0,0,206,26,4,35,208,226,100,150,211,201,29, 162,44,140,35,103,1,0,0,0,0,0,0,0,0,206,26,20,35,208,226,100,150,211,201, 29,162,44,140,35,103,1,0,0,0,0,0,0,0,0,206,26,36,35,208,226,100,150,211, 201,29,162,44,140,35,103,1,0,64,0,0,0,0,0,0,206,26,52,35,208,226,100,150, 211,201,29,162,44,140,35,103,1,0,64,0,0,0,0,0,0,206,26,68,35,208,226,100, 150,211,201,29,162,44,140,35,103,1,0,64,0,0,0,0,0,0,206,26,84,35,208,226, 100,150,211,201,29,162,44,140,35,103,1,0,128,0,0,0,0,0,0,195,154,99,16,38, 36,0,251,68,117,179,216,162,128,68,72,1,241,13,158,197,20,150,25,18,0,125, 162,58,217,232,235,117,100,162,136,25,18,0,125,162,58,217,232,235,116,36, 162,145,2,226,64,15,136,108,244,117,186,178,81,73,129,113,32,7,196,54,122, 58,221,9,40,165,64,200,144,3,237,17,214,207,79,75,171,37,20,80,200,144,3, 237,17,214,207,79,75,161,37,20,138,23,18,0,124,67,103,167,165,213,146,138, 77,11,137,0,62,33,179,211,210,232,73,69,42,133,196,128,31,10,183,2,125,89, 40,163,5,196,128,31,10,183,2,125,9,40,164,96,200,144,3,224,221,64,172,157, 89,40,163,134,68,128,31,6,234,5,100,232,73,69,35,133,68,128,31,104,142,182, 125,89,40,180,0,168,144,3,237,17,214,207,161,37,22,144,19,18,0,124,67,103, 213,146,139,80,9,137,0,62,33,179,232,73,69,172,5,90,40,153,59,68,117,179, 216,166,192,77,162,137,147,136,108,246,41,180,176,219,69,19,39,104,142,182, 122,58,221,89,41,178,6,218,40,153,59,68,117,179,209,214,232,73,77,162,6,90, 40,153,56,134,207,71,91,171,37,54,152,25,104,162,100,226,27,61,29,110,132, 148,218,160,109,162,137,147,180,71,91,61,61,46,172,148,217,67,109,20,76, 157,162,58,217,233,233,116,36,166,209,67,45,20,76,156,67,103,167,165,213, 146,155,77,12,180,81,50,113,13,158,158,151,66,74,109,84,50,209,68,201,194, 173,192,159,86,74,108,193,150,138,38,78,21,110,4,250,18,83,104,193,182,138, 38,78,13,212,10,201,213,146,155,56,109,162,137,147,131,117,2,178,116,36, 166,209,194,237,20,76,157,162,58,217,245,100,167,16,2,237,20,76,157,162,58, 217,244,36,167,18,2,173,20,76,156,67,103,213,146,156,80,10,180,81,50,113, 13,159,66,74,113,97,175,220,48,216,109,192,4,42,22,189,163,0,196,133,0,185, 80,32,28,78,99,193,18,80,36,4,19,159,141,156,0,178,90,4,74,73,0,22,209,68, 201,185,129,4,2,8,3,132,64,60,36,4,0,91,240,168,177,69,118,144,157,91,116, 116,32,32,1,53,216,221,218,170,139,3,234,219,165,0,255,152,185,11,251,232, 231,188,47,86,227,105,18,1,255,184,170,59,41,92,23,240,110,173,198,209,208, 36,3,253,188,183,177,82,110,80,224,93,122,32,32,4,144,253,170,34,22,140,7, 236,161,25,232,237,105,64,63,230,160,158,102,127,59,205,11,217,66,51,210, 128,127,237,65,60,204,254,119,155,171,197,34,168,48,6,90,162,1,0,39,75,84, 72,8,9,33,186,162,80,64,76,13,213,19,2,130,96,110,150,181,0,65,6,51,213,20, 128,65,17,11,213,19,130,137,121,211,210,210,144,6,39,75,84,80,0,201,119, 234,138,8,41,86,231,71,84,80,129,79,135,186,122,101,224,34,25,69,233,208,3, 91,141,170,40,96,139,113,180,181,69,36,21,110,54,142,134,168,165,1,176,23, 212,47,0,216,134,234,87,128,111,117,181,168,128,209,3,70,230,106,192,5,139, 168,209,234,138,32,36,144,102,235,8,3,146,27,170,40,160,146,132,103,170,40, 192,115,3,117,69,28,22,113,163,69,170,41,103,1,66,188,17,145,52,104,4,202, 113,67,76,130,227,72,194,13,240,108,0,0,83,96,0,2,185,0,104,146,84,97,48,0, 1,90,192,56,169,24,145,179,192,0,5,96,8,56,16,32,128,56,18,52,125,198,86, 147,186,140,28,50,21,13,39,31,23,60,145,158,56,204,141,47,121,6,155,190, 188,24,49,39,199,89,188,124,92,242,70,120,224,201,33,69,15,155,163,199,68, 14,49,39,199,197,211,116,240,242,113,197,231,18,180,254,4,3,17,46,18,243, 35,100,128,172,156,146,70,163,150,76,34,248,146,164,108,248,75,204,141,146, 28,217,115,9,27,79,11,241,173,235,162,160,224,200,2,206,9,113,13,148,192, 209,18,22,164,146,37,193,57,162,4,249,39,196,128,24,2,178,66,213,136,68, 201,16,77,209,131,31,192,242,88,96,92,191,151,34,100,136,38,232,255,252,92, 221,199,197,12,68,209,82,66,212,11,155,185,41,197,13,55,38,3,66,213,47,131, 250,72,12,162,99,133,116,127,196,32,225,1,3,34,92,170,9,105,164,32,225,64, 131,156,1,193,133,7,19,39,22,70,154,103,143,128,0,11,16,20,28,76,156,113, 75,34,78,62,0,0,44,128,48,104,82,146,49,240,0,1,96,11,180,192,0,5,162,1,18, 160,65,24,131,20,145,25,188,48,132,122,28,76,146,218,121,35,180,69,145,132, 108,224,31,248,0,0,0,0,0,0,25,188,56,132,122,28,76,146,218,121,35,180,69, 145,132,108,224,31,248,0,0,0,0,0,0,40,160,45,110,23,30,176,33,184,0,0,181, 32,29,235,2,27,199,23,0,0,22,196,51,120,129,8,244,56,153,37,180,242,71,104, 139,35,8,217,192,63,240,0,0,0,0,0,0,51,120,145,8,244,56,153,37,180,242,71, 104,139,35,8,217,192,64,0,0,0,0,0,0,0,51,120,161,8,244,56,153,37,180,242, 71,104,139,35,8,217,192,64,0,0,0,0,0,0,0,51,120,177,8,244,56,153,37,180, 242,71,104,139,35,8,217,192,64,16,0,0,0,0,0,0,51,120,193,8,244,56,153,37, 180,242,71,104,139,35,8,217,192,64,16,0,0,0,0,0,0,51,120,209,8,244,56,153, 37,180,242,71,104,139,35,8,217,192,64,16,0,0,0,0,0,0,51,120,225,8,244,56, 153,37,180,242,71,104,139,35,8,217,192,64,32,0,0,0,0,0,0,32,227,194,0,97, 57,162,4,246,40,5,34,92,35,68,225,161,166,219,16,16,137,112,52,41,73,29, 169,1,65,196,201,197,145,166,153,246,8,3,137,204,120,34,74,8,200,58,128,28, 211,160,130,52,78,26,26,110,248,0,0,170,4,12,70,137,195,38,0,0,42,68,159,7, 84,3,154,150,16,70,137,195,67,77,223,0,0,20,224,20,160,152,23,223,0,0,20, 226,9,65,154,232,147,161,115,59,224,0,2,156,84,12,50,9,195,38,0,0,41,133, 30,224,32,54,186,221,128,60, }; #elif defined(DUK_USE_DOUBLE_ME) DUK_INTERNAL const duk_uint8_t duk_builtins_data[4251] = { 144,148,105,225,32,68,52,228,126,12,104,201,37,132,52,167,194,138,105,244, 124,57,28,211,57,18,64,52,238,254,44,138,111,171,241,164,19,87,137,30,33, 167,18,145,159,8,211,137,9,225,42,5,240,145,139,163,163,8,211,137,10,228, 64,211,19,132,140,93,29,56,70,156,72,119,34,66,146,36,104,137,194,70,46, 142,172,35,78,36,47,146,195,102,11,240,145,139,163,175,8,211,137,9,228,240, 242,112,145,139,163,179,8,211,137,8,237,34,130,118,49,116,118,225,26,48,0, 1,94,29,201,158,46,183,39,135,147,132,140,93,16,132,76,66,33,8,66,16,132, 33,8,66,26,180,41,97,167,64,150,34,33,154,112,0,1,87,247,35,79,103,237,198, 174,216,47,31,23,95,17,13,31,217,96,211,49,50,53,212,77,141,24,0,0,179,10, 228,240,242,15,128,140,65,128,134,188,0,0,89,167,97,181,224,0,2,205,62,53, 224,0,2,205,66,237,120,0,0,179,81,204,107,192,0,5,154,150,67,94,0,0,44,212, 245,90,240,0,1,102,169,162,215,128,0,11,53,93,150,188,0,0,89,171,111,53, 108,150,163,70,0,0,42,2,249,50,94,124,35,68,225,146,49,13,24,0,0,165,161, 124,153,47,62,12,130,112,201,24,132,56,97,115,16,0,0,62,31,192,0,0,0,51,48, 0,0,60,31,192,0,0,0,50,241,32,26,193,55,132,112,161,156,72,135,26,41,200, 140,114,163,156,201,7,56,79,9,80,47,132,140,93,19,160,43,145,3,76,78,18,49, 116,78,144,238,68,133,36,72,209,19,132,140,93,19,168,47,146,195,102,11,240, 145,139,162,117,132,242,120,121,56,72,197,209,59,2,59,72,160,157,140,93,19, 181,36,242,50,143,36,31,131,162,166,7,144,238,133,227,226,235,224,242,161, 249,18,21,100,20,207,44,199,151,180,122,89,135,152,154,121,153,199,156,158, 121,218,7,158,162,121,250,71,160,166,122,26,135,162,170,122,58,199,164,16, 240,70,68,226,27,51,199,138,120,35,34,112,171,112,38,121,1,124,153,47,62, 17,162,112,201,19,211,11,228,201,121,240,100,19,134,72,158,160,91,201,18, 186,44,3,68,79,122,168,151,115,165,40,21,18,227,65,198,231,200,8,68,184,84, 53,19,38,120,128,145,144,78,25,59,72,163,48,64,144,200,39,12,157,164,80,46, 185,143,115,72,217,230,72,9,35,68,225,147,180,138,51,68,9,17,162,112,201, 218,69,2,235,152,247,52,141,158,108,128,98,72,64,121,51,132,4,81,164,144, 128,242,104,136,0,16,92,38,14,49,39,199,197,211,116,240,242,113,197,231,18, 53,189,116,65,131,18,124,117,155,199,197,207,36,103,142,12,146,20,80,249, 186,60,116,4,204,73,241,214,111,31,23,60,145,158,56,208,48,146,229,146,3,2, 82,65,155,195,94,3,10,36,4,201,196,64,56,100,42,26,78,62,46,121,35,60,113, 152,16,25,10,134,147,143,139,158,72,205,4,151,21,0,73,16,11,230,144,12,88, 144,153,39,52,144,69,241,37,72,217,240,151,153,27,36,57,178,230,16,16,137, 114,68,2,200,62,81,1,8,151,11,23,100,141,229,18,6,34,92,37,230,70,201,1,89, 57,36,2,40,152,151,44,129,83,18,124,117,155,199,197,207,36,103,142,75,12, 11,151,46,89,40,18,37,200,64,12,154,236,252,238,185,23,95,213,1,132,234,0, 194,245,128,14,56,37,199,89,188,124,92,242,70,120,232,16,26,137,113,241, 116,221,60,60,156,113,122,36,10,62,46,121,35,60,113,18,225,27,70,18,32,10, 201,211,32,67,107,104,100,42,26,78,24,147,153,35,181,181,207,64,67,107,104, 100,42,26,78,72,147,153,35,181,181,207,68,16,218,218,91,156,170,63,134,36, 230,72,237,109,116,136,16,218,218,91,156,170,63,146,36,230,72,237,109,116, 137,16,96,128,228,2,6,191,46,3,71,147,68,4,16,22,188,169,240,16,40,104,242, 135,198,171,44,68,65,5,217,231,215,6,231,62,188,8,49,1,3,162,92,4,98,12,41, 7,33,148,53,242,128,97,32,130,3,9,205,16,38,199,198,14,9,0,111,115,225,0,8, 250,72,240,207,128,241,37,73,25,18,40,0,178,58,11,56,192,2,201,104,17,35, 160,9,39,70,114,8,6,147,214,129,18,74,240,30,141,145,208,89,203,62,3,161, 163,37,248,226,185,244,11,88,37,62,33,163,37,248,226,185,252,0,127,255,130, 146,164,142,32,26,1,36,230,18,1,164,7,43,163,194,0,71,128,105,64,216,7,192, 52,192,197,66,230,72,192,52,224,209,32,232,34,68,62,129,113,32,232,34,114, 40,49,231,16,254,0,63,255,208,99,2,140,44,92,206,8,224,143,4,225,147,210, 124,13,44,92,206,9,195,39,30,228,54,126,163,225,200,169,198,133,42,166,191, 246,3,11,251,0,24,71,4,120,9,251,8,10,17,193,30,9,195,39,1,63,105,1,98,112, 201,199,185,13,159,1,63,105,32,48,156,209,2,126,227,224,58,26,50,95,142,47, 192,208,22,176,74,124,67,70,75,241,197,248,26,64,213,184,64,89,56,39,49, 224,137,62,36,2,176,19,17,254,68,3,196,143,88,4,79,162,0,210,32,34,35,253, 72,5,146,208,34,125,144,5,147,214,137,253,208,9,149,3,41,197,13,55,233,0, 185,187,139,117,137,30,8,18,39,172,1,25,187,139,112,128,178,113,110,177,35, 193,2,68,245,128,23,55,114,143,121,35,193,2,68,245,130,8,205,220,91,132,5, 147,148,123,201,30,8,18,39,172,16,18,113,67,63,128,3,68,143,32,39,243,32, 42,83,4,103,46,89,19,63,224,208,16,70,142,92,178,38,127,193,164,8,67,68, 186,12,146,247,154,1,165,64,202,113,252,160,131,32,7,35,167,26,50,235,231, 130,48,179,192,65,148,69,19,214,2,251,85,2,232,72,31,255,253,239,255,255, 255,255,226,122,196,55,106,160,93,9,0,0,0,0,0,4,0,0,3,49,0,0,3,225,252,0,0, 0,0,143,94,233,34,104,169,54,144,210,161,168,158,32,0,0,120,63,128,0,0,0, 17,235,72,96,77,21,38,210,26,84,53,19,196,0,0,15,15,240,0,0,0,0,253,35,228, 133,185,176,0,0,44,15,0,0,0,0,8,117,128,190,212,128,82,109,33,179,33,137, 24,31,255,231,232,127,255,255,255,228,58,196,55,106,64,41,54,144,217,144, 196,140,15,255,243,252,63,255,255,255,241,15,4,100,78,33,179,60,120,167, 130,50,39,10,183,2,103,144,113,8,151,10,134,162,100,221,16,18,137,113,13, 153,12,72,238,137,1,81,46,52,28,110,232,148,53,18,228,128,82,113,13,153,12, 72,238,137,142,73,78,52,0,0,0,0,0,0,0,0,8,58,254,1,12,38,248,134,23,130,0, 60,221,194,162,228,30,244,128,217,187,132,187,220,210,54,104,2,247,132,5, 205,220,124,72,36,73,14,110,252,132,25,128,193,94,8,200,149,200,3,237,38, 43,31,192,54,186,213,128,57,45,56,210,0,0,62,31,192,0,0,0,49,90,251,224,6, 77,220,24,38,78,74,113,67,77,124,16,50,110,228,208,194,114,83,138,26,107, 224,172,37,240,97,41,187,139,112,128,178,112,96,153,57,41,197,13,53,240, 113,41,187,139,112,128,178,114,104,97,57,41,197,13,53,240,128,195,95,8,44, 61,240,132,216,93,33,133,192,128,14,98,79,147,67,9,129,0,44,196,159,11,69, 175,152,32,35,100,33,135,24,147,237,38,34,246,139,95,48,64,70,200,68,8,49, 39,198,57,179,61,144,138,22,98,79,180,152,153,215,54,103,178,17,129,204,73, 240,96,153,44,132,112,163,18,125,164,196,62,130,100,178,18,1,140,73,240,96, 197,144,146,18,98,79,180,152,135,208,98,200,74,8,49,39,195,186,145,149,144, 150,22,98,79,180,152,143,215,82,50,178,19,2,140,73,241,136,109,38,73,89,9, 161,166,36,251,73,137,157,67,105,50,74,200,78,10,49,39,201,16,78,104,229, 100,39,134,152,147,237,38,41,116,130,115,71,43,33,64,60,196,159,24,133,173, 18,32,156,209,202,200,81,18,49,39,218,76,76,234,22,180,72,130,115,71,43,33, 72,68,196,159,38,134,19,46,105,56,226,150,68,157,160,1,228,73,242,104,97, 46,16,31,34,79,140,66,214,137,16,78,104,229,108,169,137,72,147,237,38,38, 117,11,90,36,65,57,163,149,178,168,21,34,79,146,32,156,209,202,218,250,161, 178,36,251,73,138,93,32,156,209,202,218,250,193,82,36,248,196,54,147,36, 173,191,174,27,34,79,180,152,153,212,54,147,36,173,191,176,17,34,79,135, 117,35,43,115,236,133,200,147,237,38,35,245,212,140,173,207,180,15,34,79, 131,4,201,108,173,133,72,147,237,38,33,244,19,37,178,184,17,34,79,140,115, 102,123,107,238,133,200,147,237,38,38,117,205,153,237,175,188,23,34,79,133, 162,215,204,16,17,182,254,248,116,137,62,210,98,47,104,181,243,4,4,109,191, 192,131,152,147,230,8,8,217,12,16,60,137,62,96,128,141,178,193,181,55,136, 200,51,128,114,108,28,100,128,0,0,0,0,0,0,0,12,110,127,32,98,115,249,73, 117,243,249,67,21,159,202,38,47,63,148,86,8,75,144,94,50,1,38,73,79,204,67, 95,231,1,6,128,14,79,129,185,40,249,18,149,181,207,142,199,155,172,248,172, 89,183,207,140,198,137,175,200,0,159,72,10,5,21,220,138,120,74,129,124,36, 98,232,228,74,81,62,160,20,10,107,185,21,114,32,105,137,194,70,46,142,68, 165,19,235,1,64,170,187,145,119,34,66,146,36,104,137,194,70,46,142,68,165, 19,236,1,64,174,187,145,95,37,134,204,23,225,35,23,71,34,82,137,246,128, 160,89,93,200,167,147,195,201,194,70,46,142,68,165,19,238,1,64,182,187,145, 71,105,20,19,177,139,163,145,41,68,16,7,6,15,82,70,72,115,96,0,118,105,160, 0,0,0,0,91,60,165,195,201,194,8,134,149,216,130,0,192,41,224,136,2,48,176, 228,1,149,13,195,15,0,200,209,97,71,128,99,32,176,131,192,113,57,143,0,167, 131,32,230,80,28,202,139,175,237,2,48,189,160,20,1,119,48,87,193,186,129, 89,56,72,197,209,200,193,185,35,23,71,109,13,219,36,98,232,237,156,13,26, 208,211,14,102,19,87,137,91,95,128,0,10,64,24,92,0,0,82,2,53,63,240,49,204, 202,10,14,38,78,44,141,52,207,31,0,0,22,32,129,100,180,8,148,145,78,102, 152,80,113,50,113,100,105,166,120,248,0,0,177,1,65,196,201,199,20,178,36, 227,224,0,2,200,3,6,133,41,35,31,0,0,22,1,44,57,137,62,33,179,216,162,152, 192,131,18,124,162,27,61,138,41,108,32,196,159,16,217,232,235,81,76,104,73, 137,62,81,13,158,142,181,20,184,16,98,79,136,108,244,244,168,166,56,36,196, 159,40,134,207,79,74,138,93,10,49,39,194,173,192,158,158,149,20,188,20,98, 79,133,91,129,61,109,74,41,124,30,68,159,16,217,236,83,108,96,68,137,62,81, 13,158,197,54,182,17,34,79,136,108,244,117,169,182,52,38,68,159,40,134,207, 71,90,155,92,8,145,39,196,54,122,122,84,219,28,19,34,79,148,67,103,167,165, 77,174,133,72,147,225,86,224,79,79,74,155,94,10,145,39,194,173,192,158,182, 165,54,190,206,25,212,35,208,226,100,150,211,201,29,162,44,140,35,103,0,0, 3,192,252,0,0,0,0,206,25,228,35,208,226,100,150,211,201,29,162,44,140,35, 103,0,0,3,192,252,0,0,0,0,206,25,244,35,208,226,100,150,211,201,29,162,44, 140,35,103,0,0,3,192,252,0,0,0,0,206,26,4,35,208,226,100,150,211,201,29, 162,44,140,35,103,0,0,0,1,0,0,0,0,0,206,26,20,35,208,226,100,150,211,201, 29,162,44,140,35,103,0,0,0,1,0,0,0,0,0,206,26,36,35,208,226,100,150,211, 201,29,162,44,140,35,103,0,0,0,65,0,0,0,0,0,206,26,52,35,208,226,100,150, 211,201,29,162,44,140,35,103,0,0,0,65,0,0,0,0,0,206,26,68,35,208,226,100, 150,211,201,29,162,44,140,35,103,0,0,0,65,0,0,0,0,0,206,26,84,35,208,226, 100,150,211,201,29,162,44,140,35,103,0,0,0,129,0,0,0,0,0,195,154,99,16,38, 36,0,251,68,117,179,216,162,128,68,72,1,241,13,158,197,20,150,25,18,0,125, 162,58,217,232,235,117,100,162,136,25,18,0,125,162,58,217,232,235,116,36, 162,145,2,226,64,15,136,108,244,117,186,178,81,73,129,113,32,7,196,54,122, 58,221,9,40,165,64,200,144,3,237,17,214,207,79,75,171,37,20,80,200,144,3, 237,17,214,207,79,75,161,37,20,138,23,18,0,124,67,103,167,165,213,146,138, 77,11,137,0,62,33,179,211,210,232,73,69,42,133,196,128,31,10,183,2,125,89, 40,163,5,196,128,31,10,183,2,125,9,40,164,96,200,144,3,224,221,64,172,157, 89,40,163,134,68,128,31,6,234,5,100,232,73,69,35,133,68,128,31,104,142,182, 125,89,40,180,0,168,144,3,237,17,214,207,161,37,22,144,19,18,0,124,67,103, 213,146,139,80,9,137,0,62,33,179,232,73,69,172,5,90,40,153,59,68,117,179, 216,166,192,77,162,137,147,136,108,246,41,180,176,219,69,19,39,104,142,182, 122,58,221,89,41,178,6,218,40,153,59,68,117,179,209,214,232,73,77,162,6,90, 40,153,56,134,207,71,91,171,37,54,152,25,104,162,100,226,27,61,29,110,132, 148,218,160,109,162,137,147,180,71,91,61,61,46,172,148,217,67,109,20,76, 157,162,58,217,233,233,116,36,166,209,67,45,20,76,156,67,103,167,165,213, 146,155,77,12,180,81,50,113,13,158,158,151,66,74,109,84,50,209,68,201,194, 173,192,159,86,74,108,193,150,138,38,78,21,110,4,250,18,83,104,193,182,138, 38,78,13,212,10,201,213,146,155,56,109,162,137,147,131,117,2,178,116,36, 166,209,194,237,20,76,157,162,58,217,245,100,167,16,2,237,20,76,157,162,58, 217,244,36,167,18,2,173,20,76,156,67,103,213,146,156,80,10,180,81,50,113, 13,159,66,74,113,97,175,220,48,216,109,192,4,42,22,189,163,0,196,133,0,185, 80,32,28,78,99,193,18,80,36,4,19,159,141,156,0,178,90,4,74,73,0,22,209,68, 201,185,129,4,2,8,3,132,64,60,36,0,171,240,84,6,149,113,72,176,157,91,116, 116,32,88,181,129,32,11,42,218,221,131,234,219,165,1,8,187,152,255,188,231, 235,248,47,86,227,105,18,2,56,175,185,255,244,17,91,40,110,173,198,209,208, 36,7,188,189,179,240,238,82,97,80,93,122,32,125,144,132,160,12,22,162,42,7, 236,161,25,232,237,105,64,158,160,230,63,205,59,127,102,11,217,66,51,210, 129,61,65,236,127,154,118,254,205,171,197,34,168,48,6,90,162,1,0,39,75,84, 72,8,9,33,186,162,80,64,76,13,213,19,2,130,96,110,150,181,0,65,6,51,213,20, 128,65,17,11,213,19,130,137,121,211,210,210,144,6,39,75,84,80,0,201,119, 234,138,8,41,86,231,71,84,80,129,79,135,186,122,101,224,34,25,69,233,208,3, 91,141,170,40,96,139,113,180,181,69,36,21,110,54,142,134,168,165,1,176,23, 212,47,0,216,134,234,87,128,111,117,181,168,128,209,3,70,230,106,192,5,139, 168,209,234,138,32,36,144,102,235,8,3,146,27,170,40,160,146,132,103,170,40, 192,115,3,117,69,28,22,113,163,69,170,41,103,1,66,188,17,145,52,104,4,202, 113,67,76,130,227,72,194,13,240,108,0,0,83,96,0,2,185,0,104,146,84,97,48,0, 1,90,192,56,169,24,145,179,192,0,5,96,8,56,16,32,128,56,18,52,125,198,86, 147,186,140,28,50,21,13,39,31,23,60,145,158,56,204,141,47,121,6,155,190, 188,24,49,39,199,89,188,124,92,242,70,120,224,201,33,69,15,155,163,199,68, 14,49,39,199,197,211,116,240,242,113,197,231,18,180,254,4,3,17,46,18,243, 35,100,128,172,156,146,70,163,150,76,34,248,146,164,108,248,75,204,141,146, 28,217,115,9,27,79,11,241,173,235,162,160,224,200,2,206,9,113,13,148,192, 209,18,22,164,146,37,193,57,162,4,249,39,196,128,24,2,178,66,213,136,68, 201,16,77,209,131,31,192,242,88,96,92,191,151,34,100,136,38,232,255,252,92, 221,199,197,12,68,209,82,66,212,11,155,185,41,197,13,55,38,3,66,213,47,131, 250,72,12,162,99,133,116,127,196,32,225,1,3,34,92,170,9,105,164,32,225,64, 131,156,1,193,133,7,19,39,22,70,154,103,143,128,0,11,16,20,28,76,156,113, 75,34,78,62,0,0,44,128,48,104,82,146,49,240,0,1,96,11,180,192,0,5,162,1,18, 160,65,24,131,20,145,25,188,48,132,122,28,76,146,218,121,35,180,69,145,132, 108,224,0,0,120,31,128,0,0,0,25,188,56,132,122,28,76,146,218,121,35,180,69, 145,132,108,224,0,0,120,31,128,0,0,0,40,160,45,110,23,30,176,33,184,0,0, 181,32,29,235,2,27,199,23,0,0,22,196,51,120,129,8,244,56,153,37,180,242,71, 104,139,35,8,217,192,0,0,240,63,0,0,0,0,51,120,145,8,244,56,153,37,180,242, 71,104,139,35,8,217,192,0,0,0,64,0,0,0,0,51,120,161,8,244,56,153,37,180, 242,71,104,139,35,8,217,192,0,0,0,64,0,0,0,0,51,120,177,8,244,56,153,37, 180,242,71,104,139,35,8,217,192,0,0,16,64,0,0,0,0,51,120,193,8,244,56,153, 37,180,242,71,104,139,35,8,217,192,0,0,16,64,0,0,0,0,51,120,209,8,244,56, 153,37,180,242,71,104,139,35,8,217,192,0,0,16,64,0,0,0,0,51,120,225,8,244, 56,153,37,180,242,71,104,139,35,8,217,192,0,0,32,64,0,0,0,0,32,227,194,0, 97,57,162,4,246,40,5,34,92,35,68,225,161,166,219,16,16,137,112,52,41,73,29, 169,1,65,196,201,197,145,166,153,246,8,3,137,204,120,34,74,8,200,58,128,28, 211,160,130,52,78,26,26,110,248,0,0,170,4,12,70,137,195,38,0,0,42,68,159,7, 84,3,154,150,16,70,137,195,67,77,223,0,0,20,224,20,160,152,23,223,0,0,20, 226,9,65,154,232,147,161,115,59,224,0,2,156,84,12,50,9,195,38,0,0,41,133, 30,224,32,54,186,221,128,60, }; #else #error invalid endianness defines #endif #endif /* DUK_USE_ROM_OBJECTS */ /* automatic undefs */ #undef DUK__REFCINIT /* * Error and fatal handling. */ /* #include duk_internal.h -> already included */ #define DUK__ERRFMT_BUFSIZE 256 /* size for formatting buffers */ #if defined(DUK_USE_VERBOSE_ERRORS) DUK_INTERNAL DUK_COLD void duk_err_handle_error_fmt(duk_hthread *thr, const char *filename, duk_uint_t line_and_code, const char *fmt, ...) { va_list ap; char msg[DUK__ERRFMT_BUFSIZE]; va_start(ap, fmt); (void) DUK_VSNPRINTF(msg, sizeof(msg), fmt, ap); msg[sizeof(msg) - 1] = (char) 0; duk_err_create_and_throw(thr, (duk_errcode_t) (line_and_code >> 24), msg, filename, (duk_int_t) (line_and_code & 0x00ffffffL)); va_end(ap); /* dead code, but ensures portability (see Linux man page notes) */ } DUK_INTERNAL DUK_COLD void duk_err_handle_error(duk_hthread *thr, const char *filename, duk_uint_t line_and_code, const char *msg) { duk_err_create_and_throw(thr, (duk_errcode_t) (line_and_code >> 24), msg, filename, (duk_int_t) (line_and_code & 0x00ffffffL)); } #else /* DUK_USE_VERBOSE_ERRORS */ DUK_INTERNAL DUK_COLD void duk_err_handle_error(duk_hthread *thr, duk_errcode_t code) { duk_err_create_and_throw(thr, code); } #endif /* DUK_USE_VERBOSE_ERRORS */ /* * Error throwing helpers */ #if defined(DUK_USE_VERBOSE_ERRORS) #if defined(DUK_USE_PARANOID_ERRORS) DUK_INTERNAL DUK_COLD void duk_err_require_type_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t idx, const char *expect_name) { DUK_ERROR_RAW_FMT3(thr, filename, linenumber, DUK_ERR_TYPE_ERROR, "%s required, found %s (stack index %ld)", expect_name, duk_get_type_name(thr, idx), (long) idx); } #else DUK_INTERNAL DUK_COLD void duk_err_require_type_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t idx, const char *expect_name) { DUK_ERROR_RAW_FMT3(thr, filename, linenumber, DUK_ERR_TYPE_ERROR, "%s required, found %s (stack index %ld)", expect_name, duk_push_string_readable(thr, idx), (long) idx); } #endif DUK_INTERNAL DUK_COLD void duk_err_error_internal(duk_hthread *thr, const char *filename, duk_int_t linenumber) { DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_ERROR, DUK_STR_INTERNAL_ERROR); } DUK_INTERNAL DUK_COLD void duk_err_error_alloc_failed(duk_hthread *thr, const char *filename, duk_int_t linenumber) { DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_ERROR, DUK_STR_ALLOC_FAILED); } DUK_INTERNAL DUK_COLD void duk_err_error(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message) { DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_ERROR, message); } DUK_INTERNAL DUK_COLD void duk_err_range(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message) { DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_RANGE_ERROR, message); } DUK_INTERNAL DUK_COLD void duk_err_range_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t idx) { DUK_ERROR_RAW_FMT1(thr, filename, linenumber, DUK_ERR_RANGE_ERROR, "invalid stack index %ld", (long) (idx)); } DUK_INTERNAL DUK_COLD void duk_err_range_push_beyond(duk_hthread *thr, const char *filename, duk_int_t linenumber) { DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_RANGE_ERROR, DUK_STR_PUSH_BEYOND_ALLOC_STACK); } DUK_INTERNAL DUK_COLD void duk_err_type_invalid_args(duk_hthread *thr, const char *filename, duk_int_t linenumber) { DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_TYPE_ERROR, DUK_STR_INVALID_ARGS); } DUK_INTERNAL DUK_COLD void duk_err_type_invalid_state(duk_hthread *thr, const char *filename, duk_int_t linenumber) { DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_TYPE_ERROR, DUK_STR_INVALID_STATE); } DUK_INTERNAL DUK_COLD void duk_err_type_invalid_trap_result(duk_hthread *thr, const char *filename, duk_int_t linenumber) { DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_TYPE_ERROR, DUK_STR_INVALID_TRAP_RESULT); } #else /* The file/line arguments are NULL and 0, they're ignored by DUK_ERROR_RAW() * when non-verbose errors are used. */ DUK_NORETURN(DUK_LOCAL_DECL void duk__err_shared(duk_hthread *thr, duk_errcode_t code)); DUK_LOCAL void duk__err_shared(duk_hthread *thr, duk_errcode_t code) { DUK_ERROR_RAW(thr, NULL, 0, code, NULL); } DUK_INTERNAL DUK_COLD void duk_err_error(duk_hthread *thr) { duk__err_shared(thr, DUK_ERR_ERROR); } DUK_INTERNAL DUK_COLD void duk_err_range(duk_hthread *thr) { duk__err_shared(thr, DUK_ERR_RANGE_ERROR); } DUK_INTERNAL DUK_COLD void duk_err_eval(duk_hthread *thr) { duk__err_shared(thr, DUK_ERR_EVAL_ERROR); } DUK_INTERNAL DUK_COLD void duk_err_reference(duk_hthread *thr) { duk__err_shared(thr, DUK_ERR_REFERENCE_ERROR); } DUK_INTERNAL DUK_COLD void duk_err_syntax(duk_hthread *thr) { duk__err_shared(thr, DUK_ERR_SYNTAX_ERROR); } DUK_INTERNAL DUK_COLD void duk_err_type(duk_hthread *thr) { duk__err_shared(thr, DUK_ERR_TYPE_ERROR); } DUK_INTERNAL DUK_COLD void duk_err_uri(duk_hthread *thr) { duk__err_shared(thr, DUK_ERR_URI_ERROR); } #endif /* * Default fatal error handler */ DUK_INTERNAL DUK_COLD void duk_default_fatal_handler(void *udata, const char *msg) { DUK_UNREF(udata); DUK_UNREF(msg); msg = msg ? msg : "NULL"; #if defined(DUK_USE_FATAL_HANDLER) /* duk_config.h provided a custom default fatal handler. */ DUK_D(DUK_DPRINT("custom default fatal error handler called: %s", msg)); DUK_USE_FATAL_HANDLER(udata, msg); #elif defined(DUK_USE_CPP_EXCEPTIONS) /* With C++ use a duk_fatal_exception which user code can catch in * a natural way. */ DUK_D(DUK_DPRINT("built-in default C++ fatal error handler called: %s", msg)); throw duk_fatal_exception(msg); #else /* Default behavior is to abort() on error. There's no printout * which makes this awkward, so it's always recommended to use an * explicit fatal error handler. * * ==================================================================== * NOTE: If you are seeing this, you are most likely dealing with an * uncaught error. You should provide a fatal error handler in Duktape * heap creation, and should consider using a protected call as your * first call into an empty Duktape context to properly handle errors. * See: * - http://duktape.org/guide.html#error-handling * - http://wiki.duktape.org/HowtoFatalErrors.html * - http://duktape.org/api.html#taglist-protected * ==================================================================== */ DUK_D(DUK_DPRINT("built-in default fatal error handler called: %s", msg)); DUK_ABORT(); #endif DUK_D(DUK_DPRINT("fatal error handler returned, enter forever loop")); for (;;) { /* Loop forever to ensure we don't return. */ } } /* automatic undefs */ #undef DUK__ERRFMT_BUFSIZE /* * Various Unicode help functions for character classification predicates, * case conversion, decoding, etc. */ /* #include duk_internal.h -> already included */ /* * Fast path tables */ #if defined(DUK_USE_IDCHAR_FASTPATH) DUK_INTERNAL const duk_int8_t duk_is_idchar_tab[128] = { /* 0: not IdentifierStart or IdentifierPart * 1: IdentifierStart and IdentifierPart * -1: IdentifierPart only */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00...0x0f */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10...0x1f */ 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20...0x2f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, /* 0x30...0x3f */ 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x40...0x4f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, /* 0x50...0x5f */ 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x60...0x6f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 /* 0x70...0x7f */ }; #endif /* * XUTF-8 and CESU-8 encoding/decoding */ DUK_INTERNAL duk_small_int_t duk_unicode_get_xutf8_length(duk_ucodepoint_t cp) { duk_uint_fast32_t x = (duk_uint_fast32_t) cp; if (x < 0x80UL) { /* 7 bits */ return 1; } else if (x < 0x800UL) { /* 11 bits */ return 2; } else if (x < 0x10000UL) { /* 16 bits */ return 3; } else if (x < 0x200000UL) { /* 21 bits */ return 4; } else if (x < 0x4000000UL) { /* 26 bits */ return 5; } else if (x < (duk_ucodepoint_t) 0x80000000UL) { /* 31 bits */ return 6; } else { /* 36 bits */ return 7; } } #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL duk_small_int_t duk_unicode_get_cesu8_length(duk_ucodepoint_t cp) { duk_uint_fast32_t x = (duk_uint_fast32_t) cp; if (x < 0x80UL) { /* 7 bits */ return 1; } else if (x < 0x800UL) { /* 11 bits */ return 2; } else if (x < 0x10000UL) { /* 16 bits */ return 3; } else { /* Encoded as surrogate pair, each encoding to 3 bytes for * 6 bytes total. Codepoints above U+10FFFF encode as 6 bytes * too, see duk_unicode_encode_cesu8(). */ return 3 + 3; } } #endif /* DUK_USE_ASSERTIONS */ DUK_INTERNAL const duk_uint8_t duk_unicode_xutf8_markers[7] = { 0x00, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; /* Encode to extended UTF-8; 'out' must have space for at least * DUK_UNICODE_MAX_XUTF8_LENGTH bytes. Allows encoding of any * 32-bit (unsigned) codepoint. */ DUK_INTERNAL duk_small_int_t duk_unicode_encode_xutf8(duk_ucodepoint_t cp, duk_uint8_t *out) { duk_uint_fast32_t x = (duk_uint_fast32_t) cp; duk_small_int_t len; duk_uint8_t marker; duk_small_int_t i; len = duk_unicode_get_xutf8_length(cp); DUK_ASSERT(len > 0); marker = duk_unicode_xutf8_markers[len - 1]; /* 64-bit OK because always >= 0 */ i = len; DUK_ASSERT(i > 0); do { i--; if (i > 0) { out[i] = (duk_uint8_t) (0x80 + (x & 0x3f)); x >>= 6; } else { /* Note: masking of 'x' is not necessary because of * range check and shifting -> no bits overlapping * the marker should be set. */ out[0] = (duk_uint8_t) (marker + x); } } while (i > 0); return len; } /* Encode to CESU-8; 'out' must have space for at least * DUK_UNICODE_MAX_CESU8_LENGTH bytes; codepoints above U+10FFFF * will encode to garbage but won't overwrite the output buffer. */ DUK_INTERNAL duk_small_int_t duk_unicode_encode_cesu8(duk_ucodepoint_t cp, duk_uint8_t *out) { duk_uint_fast32_t x = (duk_uint_fast32_t) cp; duk_small_int_t len; if (x < 0x80UL) { out[0] = (duk_uint8_t) x; len = 1; } else if (x < 0x800UL) { out[0] = (duk_uint8_t) (0xc0 + ((x >> 6) & 0x1f)); out[1] = (duk_uint8_t) (0x80 + (x & 0x3f)); len = 2; } else if (x < 0x10000UL) { /* surrogate pairs get encoded here */ out[0] = (duk_uint8_t) (0xe0 + ((x >> 12) & 0x0f)); out[1] = (duk_uint8_t) (0x80 + ((x >> 6) & 0x3f)); out[2] = (duk_uint8_t) (0x80 + (x & 0x3f)); len = 3; } else { /* * Unicode codepoints above U+FFFF are encoded as surrogate * pairs here. This ensures that all CESU-8 codepoints are * 16-bit values as expected in ECMAScript. The surrogate * pairs always get a 3-byte encoding (each) in CESU-8. * See: http://en.wikipedia.org/wiki/Surrogate_pair * * 20-bit codepoint, 10 bits (A and B) per surrogate pair: * * x = 0b00000000 0000AAAA AAAAAABB BBBBBBBB * sp1 = 0b110110AA AAAAAAAA (0xd800 + ((x >> 10) & 0x3ff)) * sp2 = 0b110111BB BBBBBBBB (0xdc00 + (x & 0x3ff)) * * Encoded into CESU-8: * * sp1 -> 0b11101101 (0xe0 + ((sp1 >> 12) & 0x0f)) * -> 0b1010AAAA (0x80 + ((sp1 >> 6) & 0x3f)) * -> 0b10AAAAAA (0x80 + (sp1 & 0x3f)) * sp2 -> 0b11101101 (0xe0 + ((sp2 >> 12) & 0x0f)) * -> 0b1011BBBB (0x80 + ((sp2 >> 6) & 0x3f)) * -> 0b10BBBBBB (0x80 + (sp2 & 0x3f)) * * Note that 0x10000 must be subtracted first. The code below * avoids the sp1, sp2 temporaries which saves around 20 bytes * of code. */ x -= 0x10000UL; out[0] = (duk_uint8_t) (0xed); out[1] = (duk_uint8_t) (0xa0 + ((x >> 16) & 0x0f)); out[2] = (duk_uint8_t) (0x80 + ((x >> 10) & 0x3f)); out[3] = (duk_uint8_t) (0xed); out[4] = (duk_uint8_t) (0xb0 + ((x >> 6) & 0x0f)); out[5] = (duk_uint8_t) (0x80 + (x & 0x3f)); len = 6; } return len; } /* Decode helper. Return zero on error. */ DUK_INTERNAL duk_small_int_t duk_unicode_decode_xutf8(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end, duk_ucodepoint_t *out_cp) { const duk_uint8_t *p; duk_uint32_t res; duk_uint_fast8_t ch; duk_small_int_t n; DUK_UNREF(thr); p = *ptr; if (p < ptr_start || p >= ptr_end) { goto fail; } /* * UTF-8 decoder which accepts longer than standard byte sequences. * This allows full 32-bit code points to be used. */ ch = (duk_uint_fast8_t) (*p++); if (ch < 0x80) { /* 0xxx xxxx [7 bits] */ res = (duk_uint32_t) (ch & 0x7f); n = 0; } else if (ch < 0xc0) { /* 10xx xxxx -> invalid */ goto fail; } else if (ch < 0xe0) { /* 110x xxxx 10xx xxxx [11 bits] */ res = (duk_uint32_t) (ch & 0x1f); n = 1; } else if (ch < 0xf0) { /* 1110 xxxx 10xx xxxx 10xx xxxx [16 bits] */ res = (duk_uint32_t) (ch & 0x0f); n = 2; } else if (ch < 0xf8) { /* 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx [21 bits] */ res = (duk_uint32_t) (ch & 0x07); n = 3; } else if (ch < 0xfc) { /* 1111 10xx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx [26 bits] */ res = (duk_uint32_t) (ch & 0x03); n = 4; } else if (ch < 0xfe) { /* 1111 110x 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx [31 bits] */ res = (duk_uint32_t) (ch & 0x01); n = 5; } else if (ch < 0xff) { /* 1111 1110 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx [36 bits] */ res = (duk_uint32_t) (0); n = 6; } else { /* 8-byte format could be: * 1111 1111 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx [41 bits] * * However, this format would not have a zero bit following the * leading one bits and would not allow 0xFF to be used as an * "invalid xutf-8" marker for internal keys. Further, 8-byte * encodings (up to 41 bit code points) are not currently needed. */ goto fail; } DUK_ASSERT(p >= ptr_start); /* verified at beginning */ if (p + n > ptr_end) { /* check pointer at end */ goto fail; } while (n > 0) { DUK_ASSERT(p >= ptr_start && p < ptr_end); ch = (duk_uint_fast8_t) (*p++); #if 0 if (ch & 0xc0 != 0x80) { /* not a continuation byte */ p--; *ptr = p; *out_cp = DUK_UNICODE_CP_REPLACEMENT_CHARACTER; return 1; } #endif res = (res << 6) + (duk_uint32_t) (ch & 0x3f); n--; } *ptr = p; *out_cp = res; return 1; fail: return 0; } /* used by e.g. duk_regexp_executor.c, string built-ins */ DUK_INTERNAL duk_ucodepoint_t duk_unicode_decode_xutf8_checked(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end) { duk_ucodepoint_t cp; if (duk_unicode_decode_xutf8(thr, ptr, ptr_start, ptr_end, &cp)) { return cp; } DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return 0;); } /* Compute (extended) utf-8 length without codepoint encoding validation, * used for string interning. * * NOTE: This algorithm is performance critical, more so than string hashing * in some cases. It is needed when interning a string and needs to scan * every byte of the string with no skipping. Having an ASCII fast path * is useful if possible in the algorithm. The current algorithms were * chosen from several variants, based on x64 gcc -O2 testing. See: * https://github.com/svaarala/duktape/pull/422 * * NOTE: must match tools/dukutil.py:duk_unicode_unvalidated_utf8_length(). */ #if defined(DUK_USE_PREFER_SIZE) /* Small variant; roughly 150 bytes smaller than the fast variant. */ DUK_INTERNAL duk_size_t duk_unicode_unvalidated_utf8_length(const duk_uint8_t *data, duk_size_t blen) { const duk_uint8_t *p; const duk_uint8_t *p_end; duk_size_t ncont; duk_size_t clen; p = data; p_end = data + blen; ncont = 0; while (p != p_end) { duk_uint8_t x; x = *p++; if (DUK_UNLIKELY(x >= 0x80 && x <= 0xbf)) { ncont++; } } DUK_ASSERT(ncont <= blen); clen = blen - ncont; DUK_ASSERT(clen <= blen); return clen; } #else /* DUK_USE_PREFER_SIZE */ /* This seems like a good overall approach. Fast path for ASCII in 4 byte * blocks. */ DUK_INTERNAL duk_size_t duk_unicode_unvalidated_utf8_length(const duk_uint8_t *data, duk_size_t blen) { const duk_uint8_t *p; const duk_uint8_t *p_end; const duk_uint32_t *p32_end; const duk_uint32_t *p32; duk_size_t ncont; duk_size_t clen; ncont = 0; /* number of continuation (non-initial) bytes in [0x80,0xbf] */ p = data; p_end = data + blen; if (blen < 16) { goto skip_fastpath; } /* Align 'p' to 4; the input data may have arbitrary alignment. * End of string check not needed because blen >= 16. */ while (((duk_size_t) (const void *) p) & 0x03U) { duk_uint8_t x; x = *p++; if (DUK_UNLIKELY(x >= 0x80 && x <= 0xbf)) { ncont++; } } /* Full, aligned 4-byte reads. */ p32_end = (const duk_uint32_t *) (const void *) (p + ((duk_size_t) (p_end - p) & (duk_size_t) (~0x03))); p32 = (const duk_uint32_t *) (const void *) p; while (p32 != (const duk_uint32_t *) p32_end) { duk_uint32_t x; x = *p32++; if (DUK_LIKELY((x & 0x80808080UL) == 0)) { ; /* ASCII fast path */ } else { /* Flip highest bit of each byte which changes * the bit pattern 10xxxxxx into 00xxxxxx which * allows an easy bit mask test. */ x ^= 0x80808080UL; if (DUK_UNLIKELY(!(x & 0xc0000000UL))) { ncont++; } if (DUK_UNLIKELY(!(x & 0x00c00000UL))) { ncont++; } if (DUK_UNLIKELY(!(x & 0x0000c000UL))) { ncont++; } if (DUK_UNLIKELY(!(x & 0x000000c0UL))) { ncont++; } } } p = (const duk_uint8_t *) p32; /* Fall through to handle the rest. */ skip_fastpath: while (p != p_end) { duk_uint8_t x; x = *p++; if (DUK_UNLIKELY(x >= 0x80 && x <= 0xbf)) { ncont++; } } DUK_ASSERT(ncont <= blen); clen = blen - ncont; DUK_ASSERT(clen <= blen); return clen; } #endif /* DUK_USE_PREFER_SIZE */ /* * Unicode range matcher * * Matches a codepoint against a packed bitstream of character ranges. * Used for slow path Unicode matching. */ /* Must match tools/extract_chars.py, generate_match_table3(). */ DUK_LOCAL duk_uint32_t duk__uni_decode_value(duk_bitdecoder_ctx *bd_ctx) { duk_uint32_t t; t = (duk_uint32_t) duk_bd_decode(bd_ctx, 4); if (t <= 0x0eU) { return t; } t = (duk_uint32_t) duk_bd_decode(bd_ctx, 8); if (t <= 0xfdU) { return t + 0x0f; } if (t == 0xfeU) { t = (duk_uint32_t) duk_bd_decode(bd_ctx, 12); return t + 0x0fU + 0xfeU; } else { t = (duk_uint32_t) duk_bd_decode(bd_ctx, 24); return t + 0x0fU + 0xfeU + 0x1000UL; } } DUK_LOCAL duk_small_int_t duk__uni_range_match(const duk_uint8_t *unitab, duk_size_t unilen, duk_codepoint_t cp) { duk_bitdecoder_ctx bd_ctx; duk_codepoint_t prev_re; duk_memzero(&bd_ctx, sizeof(bd_ctx)); bd_ctx.data = (const duk_uint8_t *) unitab; bd_ctx.length = (duk_size_t) unilen; prev_re = 0; for (;;) { duk_codepoint_t r1, r2; r1 = (duk_codepoint_t) duk__uni_decode_value(&bd_ctx); if (r1 == 0) { break; } r2 = (duk_codepoint_t) duk__uni_decode_value(&bd_ctx); r1 = prev_re + r1; r2 = r1 + r2; prev_re = r2; /* [r1,r2] is the range */ DUK_DDD(DUK_DDDPRINT("duk__uni_range_match: cp=%06lx range=[0x%06lx,0x%06lx]", (unsigned long) cp, (unsigned long) r1, (unsigned long) r2)); if (cp >= r1 && cp <= r2) { return 1; } } return 0; } /* * "WhiteSpace" production check. */ DUK_INTERNAL duk_small_int_t duk_unicode_is_whitespace(duk_codepoint_t cp) { /* * E5 Section 7.2 specifies six characters specifically as * white space: * * 0009;;Cc;0;S;;;;;N;CHARACTER TABULATION;;;; * 000B;;Cc;0;S;;;;;N;LINE TABULATION;;;; * 000C;;Cc;0;WS;;;;;N;FORM FEED (FF);;;; * 0020;SPACE;Zs;0;WS;;;;;N;;;;; * 00A0;NO-BREAK SPACE;Zs;0;CS; 0020;;;;N;NON-BREAKING SPACE;;;; * FEFF;ZERO WIDTH NO-BREAK SPACE;Cf;0;BN;;;;;N;BYTE ORDER MARK;;;; * * It also specifies any Unicode category 'Zs' characters as white * space. These can be extracted with the "tools/extract_chars.py" script. * Current result: * * RAW OUTPUT: * =========== * 0020;SPACE;Zs;0;WS;;;;;N;;;;; * 00A0;NO-BREAK SPACE;Zs;0;CS; 0020;;;;N;NON-BREAKING SPACE;;;; * 1680;OGHAM SPACE MARK;Zs;0;WS;;;;;N;;;;; * 180E;MONGOLIAN VOWEL SEPARATOR;Zs;0;WS;;;;;N;;;;; * 2000;EN QUAD;Zs;0;WS;2002;;;;N;;;;; * 2001;EM QUAD;Zs;0;WS;2003;;;;N;;;;; * 2002;EN SPACE;Zs;0;WS; 0020;;;;N;;;;; * 2003;EM SPACE;Zs;0;WS; 0020;;;;N;;;;; * 2004;THREE-PER-EM SPACE;Zs;0;WS; 0020;;;;N;;;;; * 2005;FOUR-PER-EM SPACE;Zs;0;WS; 0020;;;;N;;;;; * 2006;SIX-PER-EM SPACE;Zs;0;WS; 0020;;;;N;;;;; * 2007;FIGURE SPACE;Zs;0;WS; 0020;;;;N;;;;; * 2008;PUNCTUATION SPACE;Zs;0;WS; 0020;;;;N;;;;; * 2009;THIN SPACE;Zs;0;WS; 0020;;;;N;;;;; * 200A;HAIR SPACE;Zs;0;WS; 0020;;;;N;;;;; * 202F;NARROW NO-BREAK SPACE;Zs;0;CS; 0020;;;;N;;;;; * 205F;MEDIUM MATHEMATICAL SPACE;Zs;0;WS; 0020;;;;N;;;;; * 3000;IDEOGRAPHIC SPACE;Zs;0;WS; 0020;;;;N;;;;; * * RANGES: * ======= * 0x0020 * 0x00a0 * 0x1680 * 0x180e * 0x2000 ... 0x200a * 0x202f * 0x205f * 0x3000 * * A manual decoder (below) is probably most compact for this. */ duk_uint_fast8_t lo; duk_uint_fast32_t hi; /* cp == -1 (EOF) never matches and causes return value 0 */ lo = (duk_uint_fast8_t) (cp & 0xff); hi = (duk_uint_fast32_t) (cp >> 8); /* does not fit into an uchar */ if (hi == 0x0000UL) { if (lo == 0x09U || lo == 0x0bU || lo == 0x0cU || lo == 0x20U || lo == 0xa0U) { return 1; } } else if (hi == 0x0020UL) { if (lo <= 0x0aU || lo == 0x2fU || lo == 0x5fU) { return 1; } } else if (cp == 0x1680L || cp == 0x180eL || cp == 0x3000L || cp == 0xfeffL) { return 1; } return 0; } /* * "LineTerminator" production check. */ DUK_INTERNAL duk_small_int_t duk_unicode_is_line_terminator(duk_codepoint_t cp) { /* * E5 Section 7.3 * * A LineTerminatorSequence essentially merges sequences * into a single line terminator. This must be handled by the caller. */ if (cp == 0x000aL || cp == 0x000dL || cp == 0x2028L || cp == 0x2029L) { return 1; } return 0; } /* * "IdentifierStart" production check. */ DUK_INTERNAL duk_small_int_t duk_unicode_is_identifier_start(duk_codepoint_t cp) { /* * E5 Section 7.6: * * IdentifierStart: * UnicodeLetter * $ * _ * \ UnicodeEscapeSequence * * IdentifierStart production has one multi-character production: * * \ UnicodeEscapeSequence * * The '\' character is -not- matched by this function. Rather, the caller * should decode the escape and then call this function to check whether the * decoded character is acceptable (see discussion in E5 Section 7.6). * * The "UnicodeLetter" alternative of the production allows letters * from various Unicode categories. These can be extracted with the * "tools/extract_chars.py" script. * * Because the result has hundreds of Unicode codepoint ranges, matching * for any values >= 0x80 are done using a very slow range-by-range scan * and a packed range format. * * The ASCII portion (codepoints 0x00 ... 0x7f) is fast-pathed below because * it matters the most. The ASCII related ranges of IdentifierStart are: * * 0x0041 ... 0x005a ['A' ... 'Z'] * 0x0061 ... 0x007a ['a' ... 'z'] * 0x0024 ['$'] * 0x005f ['_'] */ /* ASCII (and EOF) fast path -- quick accept and reject */ if (cp <= 0x7fL) { #if defined(DUK_USE_IDCHAR_FASTPATH) return (cp >= 0) && (duk_is_idchar_tab[cp] > 0); #else if ((cp >= 'a' && cp <= 'z') || (cp >= 'A' && cp <= 'Z') || cp == '_' || cp == '$') { return 1; } return 0; #endif } /* Non-ASCII slow path (range-by-range linear comparison), very slow */ #if defined(DUK_USE_SOURCE_NONBMP) if (duk__uni_range_match(duk_unicode_ids_noa, (duk_size_t) sizeof(duk_unicode_ids_noa), (duk_codepoint_t) cp)) { return 1; } return 0; #else if (cp < 0x10000L) { if (duk__uni_range_match(duk_unicode_ids_noabmp, sizeof(duk_unicode_ids_noabmp), (duk_codepoint_t) cp)) { return 1; } return 0; } else { /* without explicit non-BMP support, assume non-BMP characters * are always accepted as identifier characters. */ return 1; } #endif } /* * "IdentifierPart" production check. */ DUK_INTERNAL duk_small_int_t duk_unicode_is_identifier_part(duk_codepoint_t cp) { /* * E5 Section 7.6: * * IdentifierPart: * IdentifierStart * UnicodeCombiningMark * UnicodeDigit * UnicodeConnectorPunctuation * [U+200C] * [U+200D] * * IdentifierPart production has one multi-character production * as part of its IdentifierStart alternative. The '\' character * of an escape sequence is not matched here, see discussion in * duk_unicode_is_identifier_start(). * * To match non-ASCII characters (codepoints >= 0x80), a very slow * linear range-by-range scan is used. The codepoint is first compared * to the IdentifierStart ranges, and if it doesn't match, then to a * set consisting of code points in IdentifierPart but not in * IdentifierStart. This is done to keep the unicode range data small, * at the expense of speed. * * The ASCII fast path consists of: * * 0x0030 ... 0x0039 ['0' ... '9', UnicodeDigit] * 0x0041 ... 0x005a ['A' ... 'Z', IdentifierStart] * 0x0061 ... 0x007a ['a' ... 'z', IdentifierStart] * 0x0024 ['$', IdentifierStart] * 0x005f ['_', IdentifierStart and * UnicodeConnectorPunctuation] * * UnicodeCombiningMark has no code points <= 0x7f. * * The matching code reuses the "identifier start" tables, and then * consults a separate range set for characters in "identifier part" * but not in "identifier start". These can be extracted with the * "tools/extract_chars.py" script. * * UnicodeCombiningMark -> categories Mn, Mc * UnicodeDigit -> categories Nd * UnicodeConnectorPunctuation -> categories Pc */ /* ASCII (and EOF) fast path -- quick accept and reject */ if (cp <= 0x7fL) { #if defined(DUK_USE_IDCHAR_FASTPATH) return (cp >= 0) && (duk_is_idchar_tab[cp] != 0); #else if ((cp >= 'a' && cp <= 'z') || (cp >= 'A' && cp <= 'Z') || (cp >= '0' && cp <= '9') || cp == '_' || cp == '$') { return 1; } return 0; #endif } /* Non-ASCII slow path (range-by-range linear comparison), very slow */ #if defined(DUK_USE_SOURCE_NONBMP) if (duk__uni_range_match(duk_unicode_ids_noa, sizeof(duk_unicode_ids_noa), (duk_codepoint_t) cp) || duk__uni_range_match(duk_unicode_idp_m_ids_noa, sizeof(duk_unicode_idp_m_ids_noa), (duk_codepoint_t) cp)) { return 1; } return 0; #else if (cp < 0x10000L) { if (duk__uni_range_match(duk_unicode_ids_noabmp, sizeof(duk_unicode_ids_noabmp), (duk_codepoint_t) cp) || duk__uni_range_match(duk_unicode_idp_m_ids_noabmp, sizeof(duk_unicode_idp_m_ids_noabmp), (duk_codepoint_t) cp)) { return 1; } return 0; } else { /* without explicit non-BMP support, assume non-BMP characters * are always accepted as identifier characters. */ return 1; } #endif } /* * Unicode letter check. */ DUK_INTERNAL duk_small_int_t duk_unicode_is_letter(duk_codepoint_t cp) { /* * Unicode letter is now taken to be the categories: * * Lu, Ll, Lt, Lm, Lo * * (Not sure if this is exactly correct.) * * The ASCII fast path consists of: * * 0x0041 ... 0x005a ['A' ... 'Z'] * 0x0061 ... 0x007a ['a' ... 'z'] */ /* ASCII (and EOF) fast path -- quick accept and reject */ if (cp <= 0x7fL) { if ((cp >= 'a' && cp <= 'z') || (cp >= 'A' && cp <= 'Z')) { return 1; } return 0; } /* Non-ASCII slow path (range-by-range linear comparison), very slow */ #if defined(DUK_USE_SOURCE_NONBMP) if (duk__uni_range_match(duk_unicode_ids_noa, sizeof(duk_unicode_ids_noa), (duk_codepoint_t) cp) && !duk__uni_range_match(duk_unicode_ids_m_let_noa, sizeof(duk_unicode_ids_m_let_noa), (duk_codepoint_t) cp)) { return 1; } return 0; #else if (cp < 0x10000L) { if (duk__uni_range_match(duk_unicode_ids_noabmp, sizeof(duk_unicode_ids_noabmp), (duk_codepoint_t) cp) && !duk__uni_range_match(duk_unicode_ids_m_let_noabmp, sizeof(duk_unicode_ids_m_let_noabmp), (duk_codepoint_t) cp)) { return 1; } return 0; } else { /* without explicit non-BMP support, assume non-BMP characters * are always accepted as letters. */ return 1; } #endif } /* * Complex case conversion helper which decodes a bit-packed conversion * control stream generated by tools/extract_caseconv.py. The conversion * is very slow because it runs through the conversion data in a linear * fashion to save space (which is why ASCII characters have a special * fast path before arriving here). * * The particular bit counts etc have been determined experimentally to * be small but still sufficient, and must match the Python script * (tools/extract_caseconv.py). * * The return value is the case converted codepoint or -1 if the conversion * results in multiple characters (this is useful for regexp Canonicalization * operation). If 'buf' is not NULL, the result codepoint(s) are also * appended to the hbuffer. * * Context and locale specific rules must be checked before consulting * this function. */ DUK_LOCAL duk_codepoint_t duk__slow_case_conversion(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_codepoint_t cp, duk_bitdecoder_ctx *bd_ctx) { duk_small_int_t skip = 0; duk_small_int_t n; duk_small_int_t t; duk_small_int_t count; duk_codepoint_t tmp_cp; duk_codepoint_t start_i; duk_codepoint_t start_o; DUK_ASSERT(bd_ctx != NULL); DUK_UNREF(thr); DUK_DDD(DUK_DDDPRINT("slow case conversion for codepoint: %ld", (long) cp)); /* range conversion with a "skip" */ DUK_DDD(DUK_DDDPRINT("checking ranges")); for (;;) { skip++; n = (duk_small_int_t) duk_bd_decode(bd_ctx, 6); if (n == 0x3f) { /* end marker */ break; } DUK_DDD(DUK_DDDPRINT("skip=%ld, n=%ld", (long) skip, (long) n)); while (n--) { start_i = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16); start_o = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16); count = (duk_small_int_t) duk_bd_decode(bd_ctx, 7); DUK_DDD(DUK_DDDPRINT("range: start_i=%ld, start_o=%ld, count=%ld, skip=%ld", (long) start_i, (long) start_o, (long) count, (long) skip)); if (cp >= start_i) { tmp_cp = cp - start_i; /* always >= 0 */ if (tmp_cp < (duk_codepoint_t) count * (duk_codepoint_t) skip && (tmp_cp % (duk_codepoint_t) skip) == 0) { DUK_DDD(DUK_DDDPRINT("range matches input codepoint")); cp = start_o + tmp_cp; goto single; } } } } /* 1:1 conversion */ n = (duk_small_int_t) duk_bd_decode(bd_ctx, 7); DUK_DDD(DUK_DDDPRINT("checking 1:1 conversions (count %ld)", (long) n)); while (n--) { start_i = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16); start_o = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16); DUK_DDD(DUK_DDDPRINT("1:1 conversion %ld -> %ld", (long) start_i, (long) start_o)); if (cp == start_i) { DUK_DDD(DUK_DDDPRINT("1:1 matches input codepoint")); cp = start_o; goto single; } } /* complex, multicharacter conversion */ n = (duk_small_int_t) duk_bd_decode(bd_ctx, 7); DUK_DDD(DUK_DDDPRINT("checking 1:n conversions (count %ld)", (long) n)); while (n--) { start_i = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16); t = (duk_small_int_t) duk_bd_decode(bd_ctx, 2); DUK_DDD(DUK_DDDPRINT("1:n conversion %ld -> %ld chars", (long) start_i, (long) t)); if (cp == start_i) { DUK_DDD(DUK_DDDPRINT("1:n matches input codepoint")); if (bw != NULL) { while (t--) { tmp_cp = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16); DUK_BW_WRITE_RAW_XUTF8(thr, bw, (duk_ucodepoint_t) tmp_cp); } } return -1; } else { while (t--) { (void) duk_bd_decode(bd_ctx, 16); } } } /* default: no change */ DUK_DDD(DUK_DDDPRINT("no rule matches, output is same as input")); /* fall through */ single: if (bw != NULL) { DUK_BW_WRITE_RAW_XUTF8(thr, bw, (duk_ucodepoint_t) cp); } return cp; } /* * Case conversion helper, with context/local sensitivity. * For proper case conversion, one needs to know the character * and the preceding and following characters, as well as * locale/language. */ /* XXX: add 'language' argument when locale/language sensitive rule * support added. */ DUK_LOCAL duk_codepoint_t duk__case_transform_helper(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_codepoint_t cp, duk_codepoint_t prev, duk_codepoint_t next, duk_bool_t uppercase) { duk_bitdecoder_ctx bd_ctx; /* fast path for ASCII */ if (cp < 0x80L) { /* XXX: there are language sensitive rules for the ASCII range. * If/when language/locale support is implemented, they need to * be implemented here for the fast path. There are no context * sensitive rules for ASCII range. */ if (uppercase) { if (cp >= 'a' && cp <= 'z') { cp = cp - 'a' + 'A'; } } else { if (cp >= 'A' && cp <= 'Z') { cp = cp - 'A' + 'a'; } } if (bw != NULL) { DUK_BW_WRITE_RAW_U8(thr, bw, (duk_uint8_t) cp); } return cp; } /* context and locale specific rules which cannot currently be represented * in the caseconv bitstream: hardcoded rules in C */ if (uppercase) { /* XXX: turkish / azeri */ } else { /* * Final sigma context specific rule. This is a rather tricky * rule and this handling is probably not 100% correct now. * The rule is not locale/language specific so it is supported. */ if (cp == 0x03a3L && /* U+03A3 = GREEK CAPITAL LETTER SIGMA */ duk_unicode_is_letter(prev) && /* prev exists and is not a letter */ !duk_unicode_is_letter(next)) { /* next does not exist or next is not a letter */ /* Capital sigma occurred at "end of word", lowercase to * U+03C2 = GREEK SMALL LETTER FINAL SIGMA. Otherwise * fall through and let the normal rules lowercase it to * U+03C3 = GREEK SMALL LETTER SIGMA. */ cp = 0x03c2L; goto singlechar; } /* XXX: lithuanian not implemented */ /* XXX: lithuanian, explicit dot rules */ /* XXX: turkish / azeri, lowercase rules */ } /* 1:1 or special conversions, but not locale/context specific: script generated rules */ duk_memzero(&bd_ctx, sizeof(bd_ctx)); if (uppercase) { bd_ctx.data = (const duk_uint8_t *) duk_unicode_caseconv_uc; bd_ctx.length = (duk_size_t) sizeof(duk_unicode_caseconv_uc); } else { bd_ctx.data = (const duk_uint8_t *) duk_unicode_caseconv_lc; bd_ctx.length = (duk_size_t) sizeof(duk_unicode_caseconv_lc); } return duk__slow_case_conversion(thr, bw, cp, &bd_ctx); singlechar: if (bw != NULL) { DUK_BW_WRITE_RAW_XUTF8(thr, bw, (duk_ucodepoint_t) cp); } return cp; /* unused now, not needed until Turkish/Azeri */ #if 0 nochar: return -1; #endif } /* * Replace valstack top with case converted version. */ DUK_INTERNAL void duk_unicode_case_convert_string(duk_hthread *thr, duk_bool_t uppercase) { duk_hstring *h_input; duk_bufwriter_ctx bw_alloc; duk_bufwriter_ctx *bw; const duk_uint8_t *p, *p_start, *p_end; duk_codepoint_t prev, curr, next; h_input = duk_require_hstring(thr, -1); /* Accept symbols. */ DUK_ASSERT(h_input != NULL); bw = &bw_alloc; DUK_BW_INIT_PUSHBUF(thr, bw, DUK_HSTRING_GET_BYTELEN(h_input)); /* [ ... input buffer ] */ p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input); p = p_start; prev = -1; DUK_UNREF(prev); curr = -1; next = -1; for (;;) { prev = curr; curr = next; next = -1; if (p < p_end) { next = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(thr, &p, p_start, p_end); } else { /* end of input and last char has been processed */ if (curr < 0) { break; } } /* on first round, skip */ if (curr >= 0) { /* XXX: could add a fast path to process chunks of input codepoints, * but relative benefit would be quite small. */ /* Ensure space for maximum multi-character result; estimate is overkill. */ DUK_BW_ENSURE(thr, bw, 8 * DUK_UNICODE_MAX_XUTF8_LENGTH); duk__case_transform_helper(thr, bw, (duk_codepoint_t) curr, prev, next, uppercase); } } DUK_BW_COMPACT(thr, bw); (void) duk_buffer_to_string(thr, -1); /* Safe, output is encoded. */ /* invalidates h_buf pointer */ duk_remove_m2(thr); } #if defined(DUK_USE_REGEXP_SUPPORT) /* * Canonicalize() abstract operation needed for canonicalization of individual * codepoints during regexp compilation and execution, see E5 Section 15.10.2.8. * Note that codepoints are canonicalized one character at a time, so no context * specific rules can apply. Locale specific rules can apply, though. */ DUK_INTERNAL duk_codepoint_t duk_unicode_re_canonicalize_char(duk_hthread *thr, duk_codepoint_t cp) { #if defined(DUK_USE_REGEXP_CANON_WORKAROUND) /* Fast canonicalization lookup at the cost of 128kB footprint. */ DUK_ASSERT(cp >= 0); DUK_UNREF(thr); if (DUK_LIKELY(cp < 0x10000L)) { return (duk_codepoint_t) duk_unicode_re_canon_lookup[cp]; } return cp; #else /* DUK_USE_REGEXP_CANON_WORKAROUND */ duk_codepoint_t y; y = duk__case_transform_helper(thr, NULL, /* NULL is allowed, no output */ cp, /* curr char */ -1, /* prev char */ -1, /* next char */ 1); /* uppercase */ if ((y < 0) || (cp >= 0x80 && y < 0x80)) { /* multiple codepoint conversion or non-ASCII mapped to ASCII * --> leave as is. */ return cp; } return y; #endif /* DUK_USE_REGEXP_CANON_WORKAROUND */ } /* * E5 Section 15.10.2.6 "IsWordChar" abstract operation. Assume * x < 0 for characters read outside the string. */ DUK_INTERNAL duk_small_int_t duk_unicode_re_is_wordchar(duk_codepoint_t x) { /* * Note: the description in E5 Section 15.10.2.6 has a typo, it * contains 'A' twice and lacks 'a'; the intent is [0-9a-zA-Z_]. */ if ((x >= '0' && x <= '9') || (x >= 'a' && x <= 'z') || (x >= 'A' && x <= 'Z') || (x == '_')) { return 1; } return 0; } /* * Regexp range tables */ /* exposed because lexer needs these too */ DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_digit[2] = { (duk_uint16_t) 0x0030UL, (duk_uint16_t) 0x0039UL, }; DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_white[22] = { (duk_uint16_t) 0x0009UL, (duk_uint16_t) 0x000DUL, (duk_uint16_t) 0x0020UL, (duk_uint16_t) 0x0020UL, (duk_uint16_t) 0x00A0UL, (duk_uint16_t) 0x00A0UL, (duk_uint16_t) 0x1680UL, (duk_uint16_t) 0x1680UL, (duk_uint16_t) 0x180EUL, (duk_uint16_t) 0x180EUL, (duk_uint16_t) 0x2000UL, (duk_uint16_t) 0x200AUL, (duk_uint16_t) 0x2028UL, (duk_uint16_t) 0x2029UL, (duk_uint16_t) 0x202FUL, (duk_uint16_t) 0x202FUL, (duk_uint16_t) 0x205FUL, (duk_uint16_t) 0x205FUL, (duk_uint16_t) 0x3000UL, (duk_uint16_t) 0x3000UL, (duk_uint16_t) 0xFEFFUL, (duk_uint16_t) 0xFEFFUL, }; DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_wordchar[8] = { (duk_uint16_t) 0x0030UL, (duk_uint16_t) 0x0039UL, (duk_uint16_t) 0x0041UL, (duk_uint16_t) 0x005AUL, (duk_uint16_t) 0x005FUL, (duk_uint16_t) 0x005FUL, (duk_uint16_t) 0x0061UL, (duk_uint16_t) 0x007AUL, }; DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_not_digit[4] = { (duk_uint16_t) 0x0000UL, (duk_uint16_t) 0x002FUL, (duk_uint16_t) 0x003AUL, (duk_uint16_t) 0xFFFFUL, }; DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_not_white[24] = { (duk_uint16_t) 0x0000UL, (duk_uint16_t) 0x0008UL, (duk_uint16_t) 0x000EUL, (duk_uint16_t) 0x001FUL, (duk_uint16_t) 0x0021UL, (duk_uint16_t) 0x009FUL, (duk_uint16_t) 0x00A1UL, (duk_uint16_t) 0x167FUL, (duk_uint16_t) 0x1681UL, (duk_uint16_t) 0x180DUL, (duk_uint16_t) 0x180FUL, (duk_uint16_t) 0x1FFFUL, (duk_uint16_t) 0x200BUL, (duk_uint16_t) 0x2027UL, (duk_uint16_t) 0x202AUL, (duk_uint16_t) 0x202EUL, (duk_uint16_t) 0x2030UL, (duk_uint16_t) 0x205EUL, (duk_uint16_t) 0x2060UL, (duk_uint16_t) 0x2FFFUL, (duk_uint16_t) 0x3001UL, (duk_uint16_t) 0xFEFEUL, (duk_uint16_t) 0xFF00UL, (duk_uint16_t) 0xFFFFUL, }; DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_not_wordchar[10] = { (duk_uint16_t) 0x0000UL, (duk_uint16_t) 0x002FUL, (duk_uint16_t) 0x003AUL, (duk_uint16_t) 0x0040UL, (duk_uint16_t) 0x005BUL, (duk_uint16_t) 0x005EUL, (duk_uint16_t) 0x0060UL, (duk_uint16_t) 0x0060UL, (duk_uint16_t) 0x007BUL, (duk_uint16_t) 0xFFFFUL, }; #endif /* DUK_USE_REGEXP_SUPPORT */ /* * Misc util stuff. */ /* #include duk_internal.h -> already included */ /* * Lowercase digits for radix values 2 to 36. Also doubles as lowercase * hex nybble table. */ DUK_INTERNAL const duk_uint8_t duk_lc_digits[36] = { DUK_ASC_0, DUK_ASC_1, DUK_ASC_2, DUK_ASC_3, DUK_ASC_4, DUK_ASC_5, DUK_ASC_6, DUK_ASC_7, DUK_ASC_8, DUK_ASC_9, DUK_ASC_LC_A, DUK_ASC_LC_B, DUK_ASC_LC_C, DUK_ASC_LC_D, DUK_ASC_LC_E, DUK_ASC_LC_F, DUK_ASC_LC_G, DUK_ASC_LC_H, DUK_ASC_LC_I, DUK_ASC_LC_J, DUK_ASC_LC_K, DUK_ASC_LC_L, DUK_ASC_LC_M, DUK_ASC_LC_N, DUK_ASC_LC_O, DUK_ASC_LC_P, DUK_ASC_LC_Q, DUK_ASC_LC_R, DUK_ASC_LC_S, DUK_ASC_LC_T, DUK_ASC_LC_U, DUK_ASC_LC_V, DUK_ASC_LC_W, DUK_ASC_LC_X, DUK_ASC_LC_Y, DUK_ASC_LC_Z }; DUK_INTERNAL const duk_uint8_t duk_uc_nybbles[16] = { DUK_ASC_0, DUK_ASC_1, DUK_ASC_2, DUK_ASC_3, DUK_ASC_4, DUK_ASC_5, DUK_ASC_6, DUK_ASC_7, DUK_ASC_8, DUK_ASC_9, DUK_ASC_UC_A, DUK_ASC_UC_B, DUK_ASC_UC_C, DUK_ASC_UC_D, DUK_ASC_UC_E, DUK_ASC_UC_F }; /* * Table for hex decoding ASCII hex digits */ DUK_INTERNAL const duk_int8_t duk_hex_dectab[256] = { /* -1 if invalid */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x00-0x0f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x10-0x1f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x20-0x2f */ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, /* 0x30-0x3f */ -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x40-0x4f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x50-0x5f */ -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x60-0x6f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x70-0x7f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x80-0x8f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x90-0x9f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xa0-0xaf */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xb0-0xbf */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xc0-0xcf */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xd0-0xdf */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xe0-0xef */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 /* 0xf0-0xff */ }; #if defined(DUK_USE_HEX_FASTPATH) /* Preshifted << 4. Must use 16-bit entry to allow negative value signaling. */ DUK_INTERNAL const duk_int16_t duk_hex_dectab_shift4[256] = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x00-0x0f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x10-0x1f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x20-0x2f */ 0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70, 0x80, 0x90, -1, -1, -1, -1, -1, -1, /* 0x30-0x3f */ -1, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x40-0x4f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x50-0x5f */ -1, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x60-0x6f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x70-0x7f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x80-0x8f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x90-0x9f */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xa0-0xaf */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xb0-0xbf */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xc0-0xcf */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xd0-0xdf */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xe0-0xef */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 /* 0xf0-0xff */ }; #endif /* * Table for hex encoding bytes */ #if defined(DUK_USE_HEX_FASTPATH) /* Lookup to encode one byte directly into 2 characters: * * def genhextab(bswap): * for i in xrange(256): * t = chr(i).encode('hex') * if bswap: * t = t[1] + t[0] * print('0x' + t.encode('hex') + 'U') * print('big endian'); genhextab(False) * print('little endian'); genhextab(True) */ DUK_INTERNAL const duk_uint16_t duk_hex_enctab[256] = { #if defined(DUK_USE_INTEGER_BE) 0x3030U, 0x3031U, 0x3032U, 0x3033U, 0x3034U, 0x3035U, 0x3036U, 0x3037U, 0x3038U, 0x3039U, 0x3061U, 0x3062U, 0x3063U, 0x3064U, 0x3065U, 0x3066U, 0x3130U, 0x3131U, 0x3132U, 0x3133U, 0x3134U, 0x3135U, 0x3136U, 0x3137U, 0x3138U, 0x3139U, 0x3161U, 0x3162U, 0x3163U, 0x3164U, 0x3165U, 0x3166U, 0x3230U, 0x3231U, 0x3232U, 0x3233U, 0x3234U, 0x3235U, 0x3236U, 0x3237U, 0x3238U, 0x3239U, 0x3261U, 0x3262U, 0x3263U, 0x3264U, 0x3265U, 0x3266U, 0x3330U, 0x3331U, 0x3332U, 0x3333U, 0x3334U, 0x3335U, 0x3336U, 0x3337U, 0x3338U, 0x3339U, 0x3361U, 0x3362U, 0x3363U, 0x3364U, 0x3365U, 0x3366U, 0x3430U, 0x3431U, 0x3432U, 0x3433U, 0x3434U, 0x3435U, 0x3436U, 0x3437U, 0x3438U, 0x3439U, 0x3461U, 0x3462U, 0x3463U, 0x3464U, 0x3465U, 0x3466U, 0x3530U, 0x3531U, 0x3532U, 0x3533U, 0x3534U, 0x3535U, 0x3536U, 0x3537U, 0x3538U, 0x3539U, 0x3561U, 0x3562U, 0x3563U, 0x3564U, 0x3565U, 0x3566U, 0x3630U, 0x3631U, 0x3632U, 0x3633U, 0x3634U, 0x3635U, 0x3636U, 0x3637U, 0x3638U, 0x3639U, 0x3661U, 0x3662U, 0x3663U, 0x3664U, 0x3665U, 0x3666U, 0x3730U, 0x3731U, 0x3732U, 0x3733U, 0x3734U, 0x3735U, 0x3736U, 0x3737U, 0x3738U, 0x3739U, 0x3761U, 0x3762U, 0x3763U, 0x3764U, 0x3765U, 0x3766U, 0x3830U, 0x3831U, 0x3832U, 0x3833U, 0x3834U, 0x3835U, 0x3836U, 0x3837U, 0x3838U, 0x3839U, 0x3861U, 0x3862U, 0x3863U, 0x3864U, 0x3865U, 0x3866U, 0x3930U, 0x3931U, 0x3932U, 0x3933U, 0x3934U, 0x3935U, 0x3936U, 0x3937U, 0x3938U, 0x3939U, 0x3961U, 0x3962U, 0x3963U, 0x3964U, 0x3965U, 0x3966U, 0x6130U, 0x6131U, 0x6132U, 0x6133U, 0x6134U, 0x6135U, 0x6136U, 0x6137U, 0x6138U, 0x6139U, 0x6161U, 0x6162U, 0x6163U, 0x6164U, 0x6165U, 0x6166U, 0x6230U, 0x6231U, 0x6232U, 0x6233U, 0x6234U, 0x6235U, 0x6236U, 0x6237U, 0x6238U, 0x6239U, 0x6261U, 0x6262U, 0x6263U, 0x6264U, 0x6265U, 0x6266U, 0x6330U, 0x6331U, 0x6332U, 0x6333U, 0x6334U, 0x6335U, 0x6336U, 0x6337U, 0x6338U, 0x6339U, 0x6361U, 0x6362U, 0x6363U, 0x6364U, 0x6365U, 0x6366U, 0x6430U, 0x6431U, 0x6432U, 0x6433U, 0x6434U, 0x6435U, 0x6436U, 0x6437U, 0x6438U, 0x6439U, 0x6461U, 0x6462U, 0x6463U, 0x6464U, 0x6465U, 0x6466U, 0x6530U, 0x6531U, 0x6532U, 0x6533U, 0x6534U, 0x6535U, 0x6536U, 0x6537U, 0x6538U, 0x6539U, 0x6561U, 0x6562U, 0x6563U, 0x6564U, 0x6565U, 0x6566U, 0x6630U, 0x6631U, 0x6632U, 0x6633U, 0x6634U, 0x6635U, 0x6636U, 0x6637U, 0x6638U, 0x6639U, 0x6661U, 0x6662U, 0x6663U, 0x6664U, 0x6665U, 0x6666U #else /* DUK_USE_INTEGER_BE */ 0x3030U, 0x3130U, 0x3230U, 0x3330U, 0x3430U, 0x3530U, 0x3630U, 0x3730U, 0x3830U, 0x3930U, 0x6130U, 0x6230U, 0x6330U, 0x6430U, 0x6530U, 0x6630U, 0x3031U, 0x3131U, 0x3231U, 0x3331U, 0x3431U, 0x3531U, 0x3631U, 0x3731U, 0x3831U, 0x3931U, 0x6131U, 0x6231U, 0x6331U, 0x6431U, 0x6531U, 0x6631U, 0x3032U, 0x3132U, 0x3232U, 0x3332U, 0x3432U, 0x3532U, 0x3632U, 0x3732U, 0x3832U, 0x3932U, 0x6132U, 0x6232U, 0x6332U, 0x6432U, 0x6532U, 0x6632U, 0x3033U, 0x3133U, 0x3233U, 0x3333U, 0x3433U, 0x3533U, 0x3633U, 0x3733U, 0x3833U, 0x3933U, 0x6133U, 0x6233U, 0x6333U, 0x6433U, 0x6533U, 0x6633U, 0x3034U, 0x3134U, 0x3234U, 0x3334U, 0x3434U, 0x3534U, 0x3634U, 0x3734U, 0x3834U, 0x3934U, 0x6134U, 0x6234U, 0x6334U, 0x6434U, 0x6534U, 0x6634U, 0x3035U, 0x3135U, 0x3235U, 0x3335U, 0x3435U, 0x3535U, 0x3635U, 0x3735U, 0x3835U, 0x3935U, 0x6135U, 0x6235U, 0x6335U, 0x6435U, 0x6535U, 0x6635U, 0x3036U, 0x3136U, 0x3236U, 0x3336U, 0x3436U, 0x3536U, 0x3636U, 0x3736U, 0x3836U, 0x3936U, 0x6136U, 0x6236U, 0x6336U, 0x6436U, 0x6536U, 0x6636U, 0x3037U, 0x3137U, 0x3237U, 0x3337U, 0x3437U, 0x3537U, 0x3637U, 0x3737U, 0x3837U, 0x3937U, 0x6137U, 0x6237U, 0x6337U, 0x6437U, 0x6537U, 0x6637U, 0x3038U, 0x3138U, 0x3238U, 0x3338U, 0x3438U, 0x3538U, 0x3638U, 0x3738U, 0x3838U, 0x3938U, 0x6138U, 0x6238U, 0x6338U, 0x6438U, 0x6538U, 0x6638U, 0x3039U, 0x3139U, 0x3239U, 0x3339U, 0x3439U, 0x3539U, 0x3639U, 0x3739U, 0x3839U, 0x3939U, 0x6139U, 0x6239U, 0x6339U, 0x6439U, 0x6539U, 0x6639U, 0x3061U, 0x3161U, 0x3261U, 0x3361U, 0x3461U, 0x3561U, 0x3661U, 0x3761U, 0x3861U, 0x3961U, 0x6161U, 0x6261U, 0x6361U, 0x6461U, 0x6561U, 0x6661U, 0x3062U, 0x3162U, 0x3262U, 0x3362U, 0x3462U, 0x3562U, 0x3662U, 0x3762U, 0x3862U, 0x3962U, 0x6162U, 0x6262U, 0x6362U, 0x6462U, 0x6562U, 0x6662U, 0x3063U, 0x3163U, 0x3263U, 0x3363U, 0x3463U, 0x3563U, 0x3663U, 0x3763U, 0x3863U, 0x3963U, 0x6163U, 0x6263U, 0x6363U, 0x6463U, 0x6563U, 0x6663U, 0x3064U, 0x3164U, 0x3264U, 0x3364U, 0x3464U, 0x3564U, 0x3664U, 0x3764U, 0x3864U, 0x3964U, 0x6164U, 0x6264U, 0x6364U, 0x6464U, 0x6564U, 0x6664U, 0x3065U, 0x3165U, 0x3265U, 0x3365U, 0x3465U, 0x3565U, 0x3665U, 0x3765U, 0x3865U, 0x3965U, 0x6165U, 0x6265U, 0x6365U, 0x6465U, 0x6565U, 0x6665U, 0x3066U, 0x3166U, 0x3266U, 0x3366U, 0x3466U, 0x3566U, 0x3666U, 0x3766U, 0x3866U, 0x3966U, 0x6166U, 0x6266U, 0x6366U, 0x6466U, 0x6566U, 0x6666U #endif /* DUK_USE_INTEGER_BE */ }; #endif /* DUK_USE_HEX_FASTPATH */ /* * Arbitrary byteswap for potentially unaligned values * * Used to byteswap pointers e.g. in debugger code. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) /* For now only needed by the debugger. */ DUK_INTERNAL void duk_byteswap_bytes(duk_uint8_t *p, duk_small_uint_t len) { duk_uint8_t tmp; duk_uint8_t *q = p + len - 1; while (p - q < 0) { tmp = *p; *p = *q; *q = tmp; p++; q--; } } #endif /* * Hobject ECMAScript [[Class]]. */ /* #include duk_internal.h -> already included */ #if (DUK_STRIDX_UC_ARGUMENTS > 255) #error constant too large #endif #if (DUK_STRIDX_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_UC_BOOLEAN > 255) #error constant too large #endif #if (DUK_STRIDX_DATE > 255) #error constant too large #endif #if (DUK_STRIDX_UC_ERROR > 255) #error constant too large #endif #if (DUK_STRIDX_UC_FUNCTION > 255) #error constant too large #endif #if (DUK_STRIDX_JSON > 255) #error constant too large #endif #if (DUK_STRIDX_MATH > 255) #error constant too large #endif #if (DUK_STRIDX_UC_NUMBER > 255) #error constant too large #endif #if (DUK_STRIDX_UC_OBJECT > 255) #error constant too large #endif #if (DUK_STRIDX_REG_EXP > 255) #error constant too large #endif #if (DUK_STRIDX_UC_STRING > 255) #error constant too large #endif #if (DUK_STRIDX_GLOBAL > 255) #error constant too large #endif #if (DUK_STRIDX_OBJ_ENV > 255) #error constant too large #endif #if (DUK_STRIDX_DEC_ENV > 255) #error constant too large #endif #if (DUK_STRIDX_UC_POINTER > 255) #error constant too large #endif #if (DUK_STRIDX_UC_THREAD > 255) #error constant too large #endif #if (DUK_STRIDX_ARRAY_BUFFER > 255) #error constant too large #endif #if (DUK_STRIDX_DATA_VIEW > 255) #error constant too large #endif #if (DUK_STRIDX_INT8_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_UINT8_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_UINT8_CLAMPED_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_INT16_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_UINT16_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_INT32_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_UINT32_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_FLOAT32_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_FLOAT64_ARRAY > 255) #error constant too large #endif #if (DUK_STRIDX_EMPTY_STRING > 255) #error constant too large #endif /* Note: assumes that these string indexes are 8-bit, genstrings.py must ensure that */ DUK_INTERNAL duk_uint8_t duk_class_number_to_stridx[32] = { DUK_STRIDX_EMPTY_STRING, /* NONE, intentionally empty */ DUK_STRIDX_UC_OBJECT, DUK_STRIDX_ARRAY, DUK_STRIDX_UC_FUNCTION, DUK_STRIDX_UC_ARGUMENTS, DUK_STRIDX_UC_BOOLEAN, DUK_STRIDX_DATE, DUK_STRIDX_UC_ERROR, DUK_STRIDX_JSON, DUK_STRIDX_MATH, DUK_STRIDX_UC_NUMBER, DUK_STRIDX_REG_EXP, DUK_STRIDX_UC_STRING, DUK_STRIDX_GLOBAL, DUK_STRIDX_UC_SYMBOL, DUK_STRIDX_OBJ_ENV, DUK_STRIDX_DEC_ENV, DUK_STRIDX_UC_POINTER, DUK_STRIDX_UC_THREAD, DUK_STRIDX_ARRAY_BUFFER, DUK_STRIDX_DATA_VIEW, DUK_STRIDX_INT8_ARRAY, DUK_STRIDX_UINT8_ARRAY, DUK_STRIDX_UINT8_CLAMPED_ARRAY, DUK_STRIDX_INT16_ARRAY, DUK_STRIDX_UINT16_ARRAY, DUK_STRIDX_INT32_ARRAY, DUK_STRIDX_UINT32_ARRAY, DUK_STRIDX_FLOAT32_ARRAY, DUK_STRIDX_FLOAT64_ARRAY, DUK_STRIDX_EMPTY_STRING, /* UNUSED, intentionally empty */ DUK_STRIDX_EMPTY_STRING, /* UNUSED, intentionally empty */ }; /* * Default allocation functions. * * Assumes behavior such as malloc allowing zero size, yielding * a NULL or a unique pointer which is a no-op for free. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_PROVIDE_DEFAULT_ALLOC_FUNCTIONS) DUK_INTERNAL void *duk_default_alloc_function(void *udata, duk_size_t size) { void *res; DUK_UNREF(udata); res = DUK_ANSI_MALLOC(size); DUK_DDD(DUK_DDDPRINT("default alloc function: %lu -> %p", (unsigned long) size, (void *) res)); return res; } DUK_INTERNAL void *duk_default_realloc_function(void *udata, void *ptr, duk_size_t newsize) { void *res; DUK_UNREF(udata); res = DUK_ANSI_REALLOC(ptr, newsize); DUK_DDD(DUK_DDDPRINT("default realloc function: %p %lu -> %p", (void *) ptr, (unsigned long) newsize, (void *) res)); return res; } DUK_INTERNAL void duk_default_free_function(void *udata, void *ptr) { DUK_DDD(DUK_DDDPRINT("default free function: %p", (void *) ptr)); DUK_UNREF(udata); DUK_ANSI_FREE(ptr); } #endif /* DUK_USE_PROVIDE_DEFAULT_ALLOC_FUNCTIONS */ /* * Buffer */ /* #include duk_internal.h -> already included */ DUK_EXTERNAL void *duk_resize_buffer(duk_hthread *thr, duk_idx_t idx, duk_size_t new_size) { duk_hbuffer_dynamic *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hbuffer_dynamic *) duk_require_hbuffer(thr, idx); DUK_ASSERT(h != NULL); if (!(DUK_HBUFFER_HAS_DYNAMIC(h) && !DUK_HBUFFER_HAS_EXTERNAL(h))) { DUK_ERROR_TYPE(thr, DUK_STR_WRONG_BUFFER_TYPE); DUK_WO_NORETURN(return NULL;); } /* Maximum size check is handled by callee. */ duk_hbuffer_resize(thr, h, new_size); return DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, h); } DUK_EXTERNAL void *duk_steal_buffer(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size) { duk_hbuffer_dynamic *h; void *ptr; duk_size_t sz; DUK_ASSERT_API_ENTRY(thr); h = (duk_hbuffer_dynamic *) duk_require_hbuffer(thr, idx); DUK_ASSERT(h != NULL); if (!(DUK_HBUFFER_HAS_DYNAMIC(h) && !DUK_HBUFFER_HAS_EXTERNAL(h))) { DUK_ERROR_TYPE(thr, DUK_STR_WRONG_BUFFER_TYPE); DUK_WO_NORETURN(return NULL;); } /* Forget the previous allocation, setting size to 0 and alloc to * NULL. Caller is responsible for freeing the previous allocation. * Getting the allocation and clearing it is done in the same API * call to avoid any chance of a realloc. */ ptr = DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, h); sz = DUK_HBUFFER_DYNAMIC_GET_SIZE(h); if (out_size) { *out_size = sz; } DUK_HBUFFER_DYNAMIC_SET_DATA_PTR_NULL(thr->heap, h); DUK_HBUFFER_DYNAMIC_SET_SIZE(h, 0); return ptr; } DUK_EXTERNAL void duk_config_buffer(duk_hthread *thr, duk_idx_t idx, void *ptr, duk_size_t len) { duk_hbuffer_external *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hbuffer_external *) duk_require_hbuffer(thr, idx); DUK_ASSERT(h != NULL); if (!DUK_HBUFFER_HAS_EXTERNAL(h)) { DUK_ERROR_TYPE(thr, DUK_STR_WRONG_BUFFER_TYPE); DUK_WO_NORETURN(return;); } DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(h)); DUK_HBUFFER_EXTERNAL_SET_DATA_PTR(thr->heap, h, ptr); DUK_HBUFFER_EXTERNAL_SET_SIZE(h, len); } /* * Bytecode dump/load * * The bytecode load primitive is more important performance-wise than the * dump primitive. * * Unlike most Duktape API calls, bytecode dump/load is not guaranteed to be * memory safe for invalid arguments - caller beware! There's little point * in trying to achieve memory safety unless bytecode instructions are also * validated which is not easy to do with indirect register references etc. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_BYTECODE_DUMP_SUPPORT) #define DUK__SER_MARKER 0xbf #define DUK__SER_STRING 0x00 #define DUK__SER_NUMBER 0x01 #define DUK__BYTECODE_INITIAL_ALLOC 256 #define DUK__NO_FORMALS 0xffffffffUL /* * Dump/load helpers, xxx_raw() helpers do no buffer checks */ DUK_LOCAL duk_uint8_t *duk__load_string_raw(duk_hthread *thr, duk_uint8_t *p) { duk_uint32_t len; len = DUK_RAW_READ_U32_BE(p); duk_push_lstring(thr, (const char *) p, len); p += len; return p; } DUK_LOCAL duk_uint8_t *duk__load_buffer_raw(duk_hthread *thr, duk_uint8_t *p) { duk_uint32_t len; duk_uint8_t *buf; len = DUK_RAW_READ_U32_BE(p); buf = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, (duk_size_t) len); DUK_ASSERT(buf != NULL); duk_memcpy((void *) buf, (const void *) p, (size_t) len); p += len; return p; } DUK_LOCAL duk_uint8_t *duk__dump_hstring_raw(duk_uint8_t *p, duk_hstring *h) { duk_size_t len; duk_uint32_t tmp32; DUK_ASSERT(h != NULL); len = DUK_HSTRING_GET_BYTELEN(h); DUK_ASSERT(len <= 0xffffffffUL); /* string limits */ tmp32 = (duk_uint32_t) len; DUK_RAW_WRITE_U32_BE(p, tmp32); duk_memcpy((void *) p, (const void *) DUK_HSTRING_GET_DATA(h), len); p += len; return p; } DUK_LOCAL duk_uint8_t *duk__dump_hbuffer_raw(duk_hthread *thr, duk_uint8_t *p, duk_hbuffer *h) { duk_size_t len; duk_uint32_t tmp32; DUK_ASSERT(thr != NULL); DUK_ASSERT(h != NULL); DUK_UNREF(thr); len = DUK_HBUFFER_GET_SIZE(h); DUK_ASSERT(len <= 0xffffffffUL); /* buffer limits */ tmp32 = (duk_uint32_t) len; DUK_RAW_WRITE_U32_BE(p, tmp32); /* When len == 0, buffer data pointer may be NULL. */ duk_memcpy_unsafe((void *) p, (const void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h), len); p += len; return p; } DUK_LOCAL duk_uint8_t *duk__dump_string_prop(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func, duk_small_uint_t stridx) { duk_hstring *h_str; duk_tval *tv; tv = duk_hobject_find_entry_tval_ptr_stridx(thr->heap, (duk_hobject *) func, stridx); if (tv != NULL && DUK_TVAL_IS_STRING(tv)) { h_str = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h_str != NULL); } else { h_str = DUK_HTHREAD_STRING_EMPTY_STRING(thr); DUK_ASSERT(h_str != NULL); } DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */ p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4U + DUK_HSTRING_GET_BYTELEN(h_str), p); p = duk__dump_hstring_raw(p, h_str); return p; } DUK_LOCAL duk_uint8_t *duk__dump_buffer_prop(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func, duk_small_uint_t stridx) { duk_tval *tv; tv = duk_hobject_find_entry_tval_ptr_stridx(thr->heap, (duk_hobject *) func, stridx); if (tv != NULL && DUK_TVAL_IS_BUFFER(tv)) { duk_hbuffer *h_buf; h_buf = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h_buf != NULL); DUK_ASSERT(DUK_HBUFFER_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */ p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4U + DUK_HBUFFER_GET_SIZE(h_buf), p); p = duk__dump_hbuffer_raw(thr, p, h_buf); } else { p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4U, p); DUK_RAW_WRITE_U32_BE(p, 0); } return p; } DUK_LOCAL duk_uint8_t *duk__dump_uint32_prop(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func, duk_small_uint_t stridx, duk_uint32_t def_value) { duk_tval *tv; duk_uint32_t val; tv = duk_hobject_find_entry_tval_ptr_stridx(thr->heap, (duk_hobject *) func, stridx); if (tv != NULL && DUK_TVAL_IS_NUMBER(tv)) { val = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv); } else { val = def_value; } p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4U, p); DUK_RAW_WRITE_U32_BE(p, val); return p; } DUK_LOCAL duk_uint8_t *duk__dump_varmap(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func) { duk_hobject *h; h = duk_hobject_get_varmap(thr, (duk_hobject *) func); if (h != NULL) { duk_uint_fast32_t i; /* We know _Varmap only has own properties so walk property * table directly. We also know _Varmap is dense and all * values are numbers; assert for these. GC and finalizers * shouldn't affect _Varmap so side effects should be fine. */ for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h); i++) { duk_hstring *key; duk_tval *tv_val; duk_uint32_t val; key = DUK_HOBJECT_E_GET_KEY(thr->heap, h, i); DUK_ASSERT(key != NULL); /* _Varmap is dense */ DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, h, i)); tv_val = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, h, i); DUK_ASSERT(tv_val != NULL); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_val)); /* known to be number; in fact an integer */ #if defined(DUK_USE_FASTINT) DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv_val)); DUK_ASSERT(DUK_TVAL_GET_FASTINT(tv_val) == (duk_int64_t) DUK_TVAL_GET_FASTINT_U32(tv_val)); /* known to be 32-bit */ val = DUK_TVAL_GET_FASTINT_U32(tv_val); #else val = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv_val); #endif DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */ p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4U + DUK_HSTRING_GET_BYTELEN(key) + 4U, p); p = duk__dump_hstring_raw(p, key); DUK_RAW_WRITE_U32_BE(p, val); } } p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4U, p); DUK_RAW_WRITE_U32_BE(p, 0); /* end of _Varmap */ return p; } DUK_LOCAL duk_uint8_t *duk__dump_formals(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func) { duk_harray *h; h = duk_hobject_get_formals(thr, (duk_hobject *) func); if (h != NULL) { duk_uint32_t i; /* Here we rely on _Formals being a dense array containing * strings. This should be the case unless _Formals has been * tweaked by the application (which we don't support right * now). */ p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4U, p); DUK_ASSERT(h->length != DUK__NO_FORMALS); /* limits */ DUK_RAW_WRITE_U32_BE(p, h->length); for (i = 0; i < h->length; i++) { duk_tval *tv_val; duk_hstring *varname; tv_val = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, (duk_hobject *) h, i); DUK_ASSERT(tv_val != NULL); DUK_ASSERT(DUK_TVAL_IS_STRING(tv_val)); varname = DUK_TVAL_GET_STRING(tv_val); DUK_ASSERT(varname != NULL); DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(varname) >= 1); DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */ p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4U + DUK_HSTRING_GET_BYTELEN(varname), p); p = duk__dump_hstring_raw(p, varname); } } else { DUK_DD(DUK_DDPRINT("dumping function without _Formals, emit marker to indicate missing _Formals")); p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4U, p); DUK_RAW_WRITE_U32_BE(p, DUK__NO_FORMALS); /* marker: no formals */ } return p; } static duk_uint8_t *duk__dump_func(duk_hthread *thr, duk_hcompfunc *func, duk_bufwriter_ctx *bw_ctx, duk_uint8_t *p) { duk_tval *tv, *tv_end; duk_instr_t *ins, *ins_end; duk_hobject **fn, **fn_end; duk_hstring *h_str; duk_uint32_t count_instr; duk_uint32_t tmp32; duk_uint16_t tmp16; duk_double_t d; DUK_DD(DUK_DDPRINT("dumping function %p to %p: " "consts=[%p,%p[ (%ld bytes, %ld items), " "funcs=[%p,%p[ (%ld bytes, %ld items), " "code=[%p,%p[ (%ld bytes, %ld items)", (void *) func, (void *) p, (void *) DUK_HCOMPFUNC_GET_CONSTS_BASE(thr->heap, func), (void *) DUK_HCOMPFUNC_GET_CONSTS_END(thr->heap, func), (long) DUK_HCOMPFUNC_GET_CONSTS_SIZE(thr->heap, func), (long) DUK_HCOMPFUNC_GET_CONSTS_COUNT(thr->heap, func), (void *) DUK_HCOMPFUNC_GET_FUNCS_BASE(thr->heap, func), (void *) DUK_HCOMPFUNC_GET_FUNCS_END(thr->heap, func), (long) DUK_HCOMPFUNC_GET_FUNCS_SIZE(thr->heap, func), (long) DUK_HCOMPFUNC_GET_FUNCS_COUNT(thr->heap, func), (void *) DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, func), (void *) DUK_HCOMPFUNC_GET_CODE_END(thr->heap, func), (long) DUK_HCOMPFUNC_GET_CODE_SIZE(thr->heap, func), (long) DUK_HCOMPFUNC_GET_CODE_COUNT(thr->heap, func))); DUK_ASSERT(DUK_USE_ESBC_MAX_BYTES <= 0x7fffffffUL); /* ensures no overflow */ count_instr = (duk_uint32_t) DUK_HCOMPFUNC_GET_CODE_COUNT(thr->heap, func); p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 3U * 4U + 2U * 2U + 3U * 4U + count_instr * 4U, p); /* Fixed header info. */ tmp32 = count_instr; DUK_RAW_WRITE_U32_BE(p, tmp32); tmp32 = (duk_uint32_t) DUK_HCOMPFUNC_GET_CONSTS_COUNT(thr->heap, func); DUK_RAW_WRITE_U32_BE(p, tmp32); tmp32 = (duk_uint32_t) DUK_HCOMPFUNC_GET_FUNCS_COUNT(thr->heap, func); DUK_RAW_WRITE_U32_BE(p, tmp32); tmp16 = func->nregs; DUK_RAW_WRITE_U16_BE(p, tmp16); tmp16 = func->nargs; DUK_RAW_WRITE_U16_BE(p, tmp16); #if defined(DUK_USE_DEBUGGER_SUPPORT) tmp32 = func->start_line; DUK_RAW_WRITE_U32_BE(p, tmp32); tmp32 = func->end_line; DUK_RAW_WRITE_U32_BE(p, tmp32); #else DUK_RAW_WRITE_U32_BE(p, 0); DUK_RAW_WRITE_U32_BE(p, 0); #endif tmp32 = DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) func); /* masks flags, only duk_hobject flags */ tmp32 &= ~(DUK_HOBJECT_FLAG_HAVE_FINALIZER); /* finalizer flag is lost */ DUK_RAW_WRITE_U32_BE(p, tmp32); /* Bytecode instructions: endian conversion needed unless * platform is big endian. */ ins = DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, func); ins_end = DUK_HCOMPFUNC_GET_CODE_END(thr->heap, func); DUK_ASSERT((duk_size_t) (ins_end - ins) == (duk_size_t) count_instr); #if defined(DUK_USE_INTEGER_BE) duk_memcpy_unsafe((void *) p, (const void *) ins, (size_t) (ins_end - ins)); p += (size_t) (ins_end - ins); #else while (ins != ins_end) { tmp32 = (duk_uint32_t) (*ins); DUK_RAW_WRITE_U32_BE(p, tmp32); ins++; } #endif /* Constants: variable size encoding. */ tv = DUK_HCOMPFUNC_GET_CONSTS_BASE(thr->heap, func); tv_end = DUK_HCOMPFUNC_GET_CONSTS_END(thr->heap, func); while (tv != tv_end) { /* constants are strings or numbers now */ DUK_ASSERT(DUK_TVAL_IS_STRING(tv) || DUK_TVAL_IS_NUMBER(tv)); if (DUK_TVAL_IS_STRING(tv)) { h_str = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h_str != NULL); DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */ p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 1U + 4U + DUK_HSTRING_GET_BYTELEN(h_str), p); *p++ = DUK__SER_STRING; p = duk__dump_hstring_raw(p, h_str); } else { DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 1U + 8U, p); *p++ = DUK__SER_NUMBER; d = DUK_TVAL_GET_NUMBER(tv); DUK_RAW_WRITE_DOUBLE_BE(p, d); } tv++; } /* Inner functions recursively. */ fn = (duk_hobject **) DUK_HCOMPFUNC_GET_FUNCS_BASE(thr->heap, func); fn_end = (duk_hobject **) DUK_HCOMPFUNC_GET_FUNCS_END(thr->heap, func); while (fn != fn_end) { /* XXX: This causes recursion up to inner function depth * which is normally not an issue, e.g. mark-and-sweep uses * a recursion limiter to avoid C stack issues. Avoiding * this would mean some sort of a work list or just refusing * to serialize deep functions. */ DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(*fn)); p = duk__dump_func(thr, (duk_hcompfunc *) *fn, bw_ctx, p); fn++; } /* Lexenv and varenv are not dumped. */ /* Object extra properties. * * There are some difference between function templates and functions. * For example, function templates don't have .length and nargs is * normally used to instantiate the functions. */ p = duk__dump_uint32_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_LENGTH, (duk_uint32_t) func->nargs); #if defined(DUK_USE_FUNC_NAME_PROPERTY) p = duk__dump_string_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_NAME); #endif #if defined(DUK_USE_FUNC_FILENAME_PROPERTY) p = duk__dump_string_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_FILE_NAME); #endif #if defined(DUK_USE_PC2LINE) p = duk__dump_buffer_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_INT_PC2LINE); #endif p = duk__dump_varmap(thr, p, bw_ctx, (duk_hobject *) func); p = duk__dump_formals(thr, p, bw_ctx, (duk_hobject *) func); DUK_DD(DUK_DDPRINT("serialized function %p -> final pointer %p", (void *) func, (void *) p)); return p; } /* Load a function from bytecode. The function object returned here must * match what is created by duk_js_push_closure() with respect to its flags, * properties, etc. * * NOTE: there are intentionally no input buffer length / bound checks. * Adding them would be easy but wouldn't ensure memory safety as untrusted * or broken bytecode is unsafe during execution unless the opcodes themselves * are validated (which is quite complex, especially for indirect opcodes). */ #define DUK__ASSERT_LEFT(n) do { \ DUK_ASSERT((duk_size_t) (p_end - p) >= (duk_size_t) (n)); \ } while (0) static duk_uint8_t *duk__load_func(duk_hthread *thr, duk_uint8_t *p, duk_uint8_t *p_end) { duk_hcompfunc *h_fun; duk_hbuffer *h_data; duk_size_t data_size; duk_uint32_t count_instr, count_const, count_funcs; duk_uint32_t n; duk_uint32_t tmp32; duk_small_uint_t const_type; duk_uint8_t *fun_data; duk_uint8_t *q; duk_idx_t idx_base; duk_tval *tv1; duk_uarridx_t arr_idx; duk_uarridx_t arr_limit; duk_hobject *func_env; duk_bool_t need_pop; /* XXX: There's some overlap with duk_js_closure() here, but * seems difficult to share code. Ensure that the final function * looks the same as created by duk_js_closure(). */ DUK_ASSERT(thr != NULL); DUK_DD(DUK_DDPRINT("loading function, p=%p, p_end=%p", (void *) p, (void *) p_end)); DUK__ASSERT_LEFT(3 * 4); count_instr = DUK_RAW_READ_U32_BE(p); count_const = DUK_RAW_READ_U32_BE(p); count_funcs = DUK_RAW_READ_U32_BE(p); data_size = sizeof(duk_tval) * count_const + sizeof(duk_hobject *) * count_funcs + sizeof(duk_instr_t) * count_instr; DUK_DD(DUK_DDPRINT("instr=%ld, const=%ld, funcs=%ld, data_size=%ld", (long) count_instr, (long) count_const, (long) count_const, (long) data_size)); /* Value stack is used to ensure reachability of constants and * inner functions being loaded. Require enough space to handle * large functions correctly. */ duk_require_stack(thr, (duk_idx_t) (2 + count_const + count_funcs)); idx_base = duk_get_top(thr); /* Push function object, init flags etc. This must match * duk_js_push_closure() quite carefully. */ h_fun = duk_push_hcompfunc(thr); DUK_ASSERT(h_fun != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC((duk_hobject *) h_fun)); DUK_ASSERT(DUK_HCOMPFUNC_GET_DATA(thr->heap, h_fun) == NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_FUNCS(thr->heap, h_fun) == NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_BYTECODE(thr->heap, h_fun) == NULL); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) h_fun) == thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); h_fun->nregs = DUK_RAW_READ_U16_BE(p); h_fun->nargs = DUK_RAW_READ_U16_BE(p); #if defined(DUK_USE_DEBUGGER_SUPPORT) h_fun->start_line = DUK_RAW_READ_U32_BE(p); h_fun->end_line = DUK_RAW_READ_U32_BE(p); #else p += 8; /* skip line info */ #endif /* duk_hcompfunc flags; quite version specific */ tmp32 = DUK_RAW_READ_U32_BE(p); DUK_HEAPHDR_SET_FLAGS((duk_heaphdr *) h_fun, tmp32); /* masks flags to only change duk_hobject flags */ /* standard prototype (no need to set here, already set) */ DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) h_fun) == thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); #if 0 DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, &h_fun->obj, thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); #endif /* assert just a few critical flags */ DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h_fun) == DUK_HTYPE_OBJECT); DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(&h_fun->obj)); DUK_ASSERT(DUK_HOBJECT_HAS_COMPFUNC(&h_fun->obj)); DUK_ASSERT(!DUK_HOBJECT_HAS_NATFUNC(&h_fun->obj)); DUK_ASSERT(!DUK_HOBJECT_IS_THREAD(&h_fun->obj)); DUK_ASSERT(!DUK_HOBJECT_IS_PROXY(&h_fun->obj)); DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARRAY(&h_fun->obj)); DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(&h_fun->obj)); DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(&h_fun->obj)); /* Create function 'data' buffer but don't attach it yet. */ fun_data = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, data_size); DUK_ASSERT(fun_data != NULL); /* Load bytecode instructions. */ DUK_ASSERT(sizeof(duk_instr_t) == 4); DUK__ASSERT_LEFT(count_instr * sizeof(duk_instr_t)); #if defined(DUK_USE_INTEGER_BE) q = fun_data + sizeof(duk_tval) * count_const + sizeof(duk_hobject *) * count_funcs; duk_memcpy((void *) q, (const void *) p, sizeof(duk_instr_t) * count_instr); p += sizeof(duk_instr_t) * count_instr; #else q = fun_data + sizeof(duk_tval) * count_const + sizeof(duk_hobject *) * count_funcs; for (n = count_instr; n > 0; n--) { *((duk_instr_t *) (void *) q) = DUK_RAW_READ_U32_BE(p); q += sizeof(duk_instr_t); } #endif /* Load constants onto value stack but don't yet copy to buffer. */ for (n = count_const; n > 0; n--) { DUK__ASSERT_LEFT(1); const_type = DUK_RAW_READ_U8(p); switch (const_type) { case DUK__SER_STRING: { p = duk__load_string_raw(thr, p); break; } case DUK__SER_NUMBER: { /* Important to do a fastint check so that constants are * properly read back as fastints. */ duk_tval tv_tmp; duk_double_t val; DUK__ASSERT_LEFT(8); val = DUK_RAW_READ_DOUBLE_BE(p); DUK_TVAL_SET_NUMBER_CHKFAST_SLOW(&tv_tmp, val); duk_push_tval(thr, &tv_tmp); break; } default: { goto format_error; } } } /* Load inner functions to value stack, but don't yet copy to buffer. */ for (n = count_funcs; n > 0; n--) { p = duk__load_func(thr, p, p_end); if (p == NULL) { goto format_error; } } /* With constants and inner functions on value stack, we can now * atomically finish the function 'data' buffer, bump refcounts, * etc. * * Here we take advantage of the value stack being just a duk_tval * array: we can just memcpy() the constants as long as we incref * them afterwards. */ h_data = (duk_hbuffer *) duk_known_hbuffer(thr, idx_base + 1); DUK_ASSERT(!DUK_HBUFFER_HAS_DYNAMIC(h_data)); DUK_HCOMPFUNC_SET_DATA(thr->heap, h_fun, h_data); DUK_HBUFFER_INCREF(thr, h_data); tv1 = duk_get_tval(thr, idx_base + 2); /* may be NULL if no constants or inner funcs */ DUK_ASSERT((count_const == 0 && count_funcs == 0) || tv1 != NULL); q = fun_data; duk_memcpy_unsafe((void *) q, (const void *) tv1, sizeof(duk_tval) * count_const); for (n = count_const; n > 0; n--) { DUK_TVAL_INCREF_FAST(thr, (duk_tval *) (void *) q); /* no side effects */ q += sizeof(duk_tval); } tv1 += count_const; DUK_HCOMPFUNC_SET_FUNCS(thr->heap, h_fun, (duk_hobject **) (void *) q); for (n = count_funcs; n > 0; n--) { duk_hobject *h_obj; DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv1)); h_obj = DUK_TVAL_GET_OBJECT(tv1); DUK_ASSERT(h_obj != NULL); tv1++; DUK_HOBJECT_INCREF(thr, h_obj); *((duk_hobject **) (void *) q) = h_obj; q += sizeof(duk_hobject *); } DUK_HCOMPFUNC_SET_BYTECODE(thr->heap, h_fun, (duk_instr_t *) (void *) q); /* The function object is now reachable and refcounts are fine, * so we can pop off all the temporaries. */ DUK_DDD(DUK_DDDPRINT("function is reachable, reset top; func: %!iT", duk_get_tval(thr, idx_base))); duk_set_top(thr, idx_base + 1); /* Setup function properties. */ tmp32 = DUK_RAW_READ_U32_BE(p); duk_push_u32(thr, tmp32); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_C); #if defined(DUK_USE_FUNC_NAME_PROPERTY) p = duk__load_string_raw(thr, p); /* -> [ func funcname ] */ func_env = thr->builtins[DUK_BIDX_GLOBAL_ENV]; DUK_ASSERT(func_env != NULL); need_pop = 0; if (DUK_HOBJECT_HAS_NAMEBINDING((duk_hobject *) h_fun)) { /* Original function instance/template had NAMEBINDING. * Must create a lexical environment on loading to allow * recursive functions like 'function foo() { foo(); }'. */ duk_hdecenv *new_env; new_env = duk_hdecenv_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV)); DUK_ASSERT(new_env != NULL); DUK_ASSERT(new_env->thread == NULL); /* Closed. */ DUK_ASSERT(new_env->varmap == NULL); DUK_ASSERT(new_env->regbase_byteoff == 0); DUK_HDECENV_ASSERT_VALID(new_env); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) new_env) == NULL); DUK_HOBJECT_SET_PROTOTYPE(thr->heap, (duk_hobject *) new_env, func_env); DUK_HOBJECT_INCREF(thr, func_env); func_env = (duk_hobject *) new_env; duk_push_hobject(thr, (duk_hobject *) new_env); duk_dup_m2(thr); /* -> [ func funcname env funcname ] */ duk_dup(thr, idx_base); /* -> [ func funcname env funcname func ] */ duk_xdef_prop(thr, -3, DUK_PROPDESC_FLAGS_NONE); /* -> [ func funcname env ] */ need_pop = 1; /* Need to pop env, but -after- updating h_fun and increfs. */ } DUK_ASSERT(func_env != NULL); DUK_HCOMPFUNC_SET_LEXENV(thr->heap, h_fun, func_env); DUK_HCOMPFUNC_SET_VARENV(thr->heap, h_fun, func_env); DUK_HOBJECT_INCREF(thr, func_env); DUK_HOBJECT_INCREF(thr, func_env); if (need_pop) { duk_pop(thr); } duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_C); #endif /* DUK_USE_FUNC_NAME_PROPERTY */ #if defined(DUK_USE_FUNC_FILENAME_PROPERTY) p = duk__load_string_raw(thr, p); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_C); #endif /* DUK_USE_FUNC_FILENAME_PROPERTY */ if (DUK_HOBJECT_HAS_CONSTRUCTABLE((duk_hobject *) h_fun)) { /* Restore empty external .prototype only for constructable * functions. The prototype object should inherit from * Object.prototype. */ duk_push_object(thr); DUK_ASSERT(!duk_is_bare_object(thr, -1)); duk_dup_m2(thr); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_CONSTRUCTOR, DUK_PROPDESC_FLAGS_WC); /* func.prototype.constructor = func */ duk_compact_m1(thr); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_PROTOTYPE, DUK_PROPDESC_FLAGS_W); } #if defined(DUK_USE_PC2LINE) p = duk__load_buffer_raw(thr, p); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_PC2LINE, DUK_PROPDESC_FLAGS_WC); #endif /* DUK_USE_PC2LINE */ duk_push_bare_object(thr); /* _Varmap */ for (;;) { /* XXX: awkward */ p = duk__load_string_raw(thr, p); if (duk_get_length(thr, -1) == 0) { duk_pop(thr); break; } tmp32 = DUK_RAW_READ_U32_BE(p); duk_push_u32(thr, tmp32); duk_put_prop(thr, -3); } duk_compact_m1(thr); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VARMAP, DUK_PROPDESC_FLAGS_NONE); /* _Formals may have been missing in the original function, which is * handled using a marker length. */ arr_limit = DUK_RAW_READ_U32_BE(p); if (arr_limit != DUK__NO_FORMALS) { duk_push_bare_array(thr); /* _Formals */ for (arr_idx = 0; arr_idx < arr_limit; arr_idx++) { p = duk__load_string_raw(thr, p); duk_put_prop_index(thr, -2, arr_idx); } duk_compact_m1(thr); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_FORMALS, DUK_PROPDESC_FLAGS_NONE); } else { DUK_DD(DUK_DDPRINT("no _Formals in dumped function")); } /* Return with final function pushed on stack top. */ DUK_DD(DUK_DDPRINT("final loaded function: %!iT", duk_get_tval(thr, -1))); DUK_ASSERT_TOP(thr, idx_base + 1); return p; format_error: return NULL; } DUK_EXTERNAL void duk_dump_function(duk_hthread *thr) { duk_hcompfunc *func; duk_bufwriter_ctx bw_ctx_alloc; duk_bufwriter_ctx *bw_ctx = &bw_ctx_alloc; duk_uint8_t *p; DUK_ASSERT_API_ENTRY(thr); /* Bound functions don't have all properties so we'd either need to * lookup the non-bound target function or reject bound functions. * For now, bound functions are rejected with TypeError. */ func = duk_require_hcompfunc(thr, -1); DUK_ASSERT(func != NULL); DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(&func->obj)); /* Estimating the result size beforehand would be costly, so * start with a reasonable size and extend as needed. */ DUK_BW_INIT_PUSHBUF(thr, bw_ctx, DUK__BYTECODE_INITIAL_ALLOC); p = DUK_BW_GET_PTR(thr, bw_ctx); *p++ = DUK__SER_MARKER; p = duk__dump_func(thr, func, bw_ctx, p); DUK_BW_SET_PTR(thr, bw_ctx, p); DUK_BW_COMPACT(thr, bw_ctx); DUK_DD(DUK_DDPRINT("serialized result: %!T", duk_get_tval(thr, -1))); duk_remove_m2(thr); /* [ ... func buf ] -> [ ... buf ] */ } DUK_EXTERNAL void duk_load_function(duk_hthread *thr) { duk_uint8_t *p_buf, *p, *p_end; duk_size_t sz; DUK_ASSERT_API_ENTRY(thr); p_buf = (duk_uint8_t *) duk_require_buffer(thr, -1, &sz); DUK_ASSERT(p_buf != NULL); /* The caller is responsible for being sure that bytecode being loaded * is valid and trusted. Invalid bytecode can cause memory unsafe * behavior directly during loading or later during bytecode execution * (instruction validation would be quite complex to implement). * * This signature check is the only sanity check for detecting * accidental invalid inputs. The initial byte ensures no ordinary * string or Symbol will be accepted by accident. */ p = p_buf; p_end = p_buf + sz; if (sz < 1 || p[0] != DUK__SER_MARKER) { goto format_error; } p++; p = duk__load_func(thr, p, p_end); if (p == NULL) { goto format_error; } duk_remove_m2(thr); /* [ ... buf func ] -> [ ... func ] */ return; format_error: DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BYTECODE); DUK_WO_NORETURN(return;); } #else /* DUK_USE_BYTECODE_DUMP_SUPPORT */ DUK_EXTERNAL void duk_dump_function(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_load_function(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } #endif /* DUK_USE_BYTECODE_DUMP_SUPPORT */ /* automatic undefs */ #undef DUK__ASSERT_LEFT #undef DUK__BYTECODE_INITIAL_ALLOC #undef DUK__NO_FORMALS #undef DUK__SER_MARKER #undef DUK__SER_NUMBER #undef DUK__SER_STRING /* * Calls. * * Protected variants should avoid ever throwing an error. Must be careful * to catch errors related to value stack manipulation and property lookup, * not just the call itself. * * The only exception is when arguments are insane, e.g. nargs/nrets are out * of bounds; in such cases an error is thrown for two reasons. First, we * can't always respect the value stack input/output guarantees in such cases * so the caller would end up with the value stack in an unexpected state. * Second, an attempt to create an error might itself fail (although this * could be avoided by pushing a preallocated object/string or a primitive * value). */ /* #include duk_internal.h -> already included */ /* * Helpers */ struct duk__pcall_prop_args { duk_idx_t obj_idx; duk_idx_t nargs; duk_small_uint_t call_flags; }; typedef struct duk__pcall_prop_args duk__pcall_prop_args; struct duk__pcall_method_args { duk_idx_t nargs; duk_small_uint_t call_flags; }; typedef struct duk__pcall_method_args duk__pcall_method_args; struct duk__pcall_args { duk_idx_t nargs; duk_small_uint_t call_flags; }; typedef struct duk__pcall_args duk__pcall_args; /* Compute and validate idx_func for a certain 'nargs' and 'other' * parameter count (1 or 2, depending on whether 'this' binding is * present). */ DUK_LOCAL duk_idx_t duk__call_get_idx_func(duk_hthread *thr, duk_idx_t nargs, duk_idx_t other) { duk_idx_t idx_func; /* XXX: byte arithmetic? */ DUK_ASSERT(other >= 0); idx_func = duk_get_top(thr) - nargs - other; if (DUK_UNLIKELY((idx_func | nargs) < 0)) { /* idx_func < 0 || nargs < 0; OR sign bits */ DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return 0;); } DUK_ASSERT(duk_is_valid_index(thr, idx_func)); return idx_func; } /* Compute idx_func, assume index will be valid. This is a valid assumption * for protected calls: nargs < 0 is checked explicitly and duk_safe_call() * validates the argument count. */ DUK_LOCAL duk_idx_t duk__call_get_idx_func_unvalidated(duk_hthread *thr, duk_idx_t nargs, duk_idx_t other) { duk_idx_t idx_func; /* XXX: byte arithmetic? */ DUK_ASSERT(nargs >= 0); DUK_ASSERT(other >= 0); idx_func = duk_get_top(thr) - nargs - other; DUK_ASSERT(idx_func >= 0); DUK_ASSERT(duk_is_valid_index(thr, idx_func)); return idx_func; } /* Prepare value stack for a method call through an object property. * May currently throw an error e.g. when getting the property. */ DUK_LOCAL void duk__call_prop_prep_stack(duk_hthread *thr, duk_idx_t normalized_obj_idx, duk_idx_t nargs) { DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(nargs >= 0); DUK_DDD(DUK_DDDPRINT("duk__call_prop_prep_stack, normalized_obj_idx=%ld, nargs=%ld, stacktop=%ld", (long) normalized_obj_idx, (long) nargs, (long) duk_get_top(thr))); /* [... key arg1 ... argN] */ /* duplicate key */ duk_dup(thr, -nargs - 1); /* Note: -nargs alone would fail for nargs == 0, this is OK */ (void) duk_get_prop(thr, normalized_obj_idx); DUK_DDD(DUK_DDDPRINT("func: %!T", (duk_tval *) duk_get_tval(thr, -1))); #if defined(DUK_USE_VERBOSE_ERRORS) if (DUK_UNLIKELY(!duk_is_callable(thr, -1))) { duk_tval *tv_base; duk_tval *tv_key; /* tv_targ is passed on stack top (at index -1). */ tv_base = DUK_GET_TVAL_POSIDX(thr, normalized_obj_idx); tv_key = DUK_GET_TVAL_NEGIDX(thr, -nargs - 2); DUK_ASSERT(tv_base >= thr->valstack_bottom && tv_base < thr->valstack_top); DUK_ASSERT(tv_key >= thr->valstack_bottom && tv_key < thr->valstack_top); duk_call_setup_propcall_error(thr, tv_base, tv_key); } #endif /* [... key arg1 ... argN func] */ duk_replace(thr, -nargs - 2); /* [... func arg1 ... argN] */ duk_dup(thr, normalized_obj_idx); duk_insert(thr, -nargs - 1); /* [... func this arg1 ... argN] */ } DUK_EXTERNAL void duk_call(duk_hthread *thr, duk_idx_t nargs) { duk_small_uint_t call_flags; duk_idx_t idx_func; DUK_ASSERT_API_ENTRY(thr); idx_func = duk__call_get_idx_func(thr, nargs, 1); DUK_ASSERT(duk_is_valid_index(thr, idx_func)); duk_insert_undefined(thr, idx_func + 1); call_flags = 0; /* not protected, respect reclimit, not constructor */ duk_handle_call_unprotected(thr, idx_func, call_flags); } DUK_EXTERNAL void duk_call_method(duk_hthread *thr, duk_idx_t nargs) { duk_small_uint_t call_flags; duk_idx_t idx_func; DUK_ASSERT_API_ENTRY(thr); idx_func = duk__call_get_idx_func(thr, nargs, 2); DUK_ASSERT(duk_is_valid_index(thr, idx_func)); call_flags = 0; /* not protected, respect reclimit, not constructor */ duk_handle_call_unprotected(thr, idx_func, call_flags); } DUK_EXTERNAL void duk_call_prop(duk_hthread *thr, duk_idx_t obj_idx, duk_idx_t nargs) { /* * XXX: if duk_handle_call() took values through indices, this could be * made much more sensible. However, duk_handle_call() needs to fudge * the 'this' and 'func' values to handle bound functions, which is now * done "in-place", so this is not a trivial change. */ DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); /* make absolute */ if (DUK_UNLIKELY(nargs < 0)) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return;); } duk__call_prop_prep_stack(thr, obj_idx, nargs); duk_call_method(thr, nargs); } DUK_LOCAL duk_ret_t duk__pcall_raw(duk_hthread *thr, void *udata) { duk__pcall_args *args; duk_idx_t idx_func; duk_int_t ret; DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(udata != NULL); args = (duk__pcall_args *) udata; idx_func = duk__call_get_idx_func_unvalidated(thr, args->nargs, 1); DUK_ASSERT(duk_is_valid_index(thr, idx_func)); duk_insert_undefined(thr, idx_func + 1); ret = duk_handle_call_unprotected(thr, idx_func, args->call_flags); DUK_ASSERT(ret == 0); DUK_UNREF(ret); return 1; } DUK_EXTERNAL duk_int_t duk_pcall(duk_hthread *thr, duk_idx_t nargs) { duk__pcall_args args; DUK_ASSERT_API_ENTRY(thr); args.nargs = nargs; if (DUK_UNLIKELY(nargs < 0)) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return DUK_EXEC_ERROR;); } args.call_flags = 0; return duk_safe_call(thr, duk__pcall_raw, (void *) &args /*udata*/, nargs + 1 /*nargs*/, 1 /*nrets*/); } DUK_LOCAL duk_ret_t duk__pcall_method_raw(duk_hthread *thr, void *udata) { duk__pcall_method_args *args; duk_idx_t idx_func; duk_int_t ret; DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(udata != NULL); args = (duk__pcall_method_args *) udata; idx_func = duk__call_get_idx_func_unvalidated(thr, args->nargs, 2); DUK_ASSERT(duk_is_valid_index(thr, idx_func)); ret = duk_handle_call_unprotected(thr, idx_func, args->call_flags); DUK_ASSERT(ret == 0); DUK_UNREF(ret); return 1; } DUK_INTERNAL duk_int_t duk_pcall_method_flags(duk_hthread *thr, duk_idx_t nargs, duk_small_uint_t call_flags) { duk__pcall_method_args args; DUK_ASSERT_API_ENTRY(thr); args.nargs = nargs; if (DUK_UNLIKELY(nargs < 0)) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return DUK_EXEC_ERROR;); } args.call_flags = call_flags; return duk_safe_call(thr, duk__pcall_method_raw, (void *) &args /*udata*/, nargs + 2 /*nargs*/, 1 /*nrets*/); } DUK_EXTERNAL duk_int_t duk_pcall_method(duk_hthread *thr, duk_idx_t nargs) { DUK_ASSERT_API_ENTRY(thr); return duk_pcall_method_flags(thr, nargs, 0); } DUK_LOCAL duk_ret_t duk__pcall_prop_raw(duk_hthread *thr, void *udata) { duk__pcall_prop_args *args; duk_idx_t obj_idx; duk_int_t ret; DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(udata != NULL); args = (duk__pcall_prop_args *) udata; obj_idx = duk_require_normalize_index(thr, args->obj_idx); /* make absolute */ duk__call_prop_prep_stack(thr, obj_idx, args->nargs); ret = duk_handle_call_unprotected_nargs(thr, args->nargs, args->call_flags); DUK_ASSERT(ret == 0); DUK_UNREF(ret); return 1; } DUK_EXTERNAL duk_int_t duk_pcall_prop(duk_hthread *thr, duk_idx_t obj_idx, duk_idx_t nargs) { duk__pcall_prop_args args; DUK_ASSERT_API_ENTRY(thr); args.obj_idx = obj_idx; args.nargs = nargs; if (DUK_UNLIKELY(nargs < 0)) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return DUK_EXEC_ERROR;); } args.call_flags = 0; return duk_safe_call(thr, duk__pcall_prop_raw, (void *) &args /*udata*/, nargs + 1 /*nargs*/, 1 /*nrets*/); } DUK_EXTERNAL duk_int_t duk_safe_call(duk_hthread *thr, duk_safe_call_function func, void *udata, duk_idx_t nargs, duk_idx_t nrets) { duk_int_t rc; DUK_ASSERT_API_ENTRY(thr); /* nargs condition; fail if: top - bottom < nargs * <=> top < bottom + nargs * nrets condition; fail if: end - (top - nargs) < nrets * <=> end - top + nargs < nrets * <=> end + nargs < top + nrets */ /* XXX: check for any reserve? */ if (DUK_UNLIKELY((nargs | nrets) < 0 || /* nargs < 0 || nrets < 0; OR sign bits */ thr->valstack_top < thr->valstack_bottom + nargs || /* nargs too large compared to top */ thr->valstack_end + nargs < thr->valstack_top + nrets)) { /* nrets too large compared to reserve */ DUK_D(DUK_DPRINT("not enough stack reserve for safe call or invalid arguments: " "nargs=%ld < 0 (?), nrets=%ld < 0 (?), top=%ld < bottom=%ld + nargs=%ld (?), " "end=%ld + nargs=%ld < top=%ld + nrets=%ld (?)", (long) nargs, (long) nrets, (long) (thr->valstack_top - thr->valstack), (long) (thr->valstack_bottom - thr->valstack), (long) nargs, (long) (thr->valstack_end - thr->valstack), (long) nargs, (long) (thr->valstack_top - thr->valstack), (long) nrets)); DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return DUK_EXEC_ERROR;); } rc = duk_handle_safe_call(thr, /* thread */ func, /* func */ udata, /* udata */ nargs, /* num_stack_args */ nrets); /* num_stack_res */ return rc; } DUK_EXTERNAL void duk_new(duk_hthread *thr, duk_idx_t nargs) { duk_idx_t idx_func; DUK_ASSERT_API_ENTRY(thr); idx_func = duk__call_get_idx_func(thr, nargs, 1); DUK_ASSERT(duk_is_valid_index(thr, idx_func)); duk_push_object(thr); /* default instance; internal proto updated by call handling */ duk_insert(thr, idx_func + 1); duk_handle_call_unprotected(thr, idx_func, DUK_CALL_FLAG_CONSTRUCT); } DUK_LOCAL duk_ret_t duk__pnew_helper(duk_hthread *thr, void *udata) { duk_idx_t nargs; DUK_ASSERT(udata != NULL); nargs = *((duk_idx_t *) udata); duk_new(thr, nargs); return 1; } DUK_EXTERNAL duk_int_t duk_pnew(duk_hthread *thr, duk_idx_t nargs) { duk_int_t rc; DUK_ASSERT_API_ENTRY(thr); /* For now, just use duk_safe_call() to wrap duk_new(). We can't * simply use a protected duk_handle_call() because pushing the * default instance might throw. */ if (DUK_UNLIKELY(nargs < 0)) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return DUK_EXEC_ERROR;); } rc = duk_safe_call(thr, duk__pnew_helper, (void *) &nargs /*udata*/, nargs + 1 /*nargs*/, 1 /*nrets*/); return rc; } DUK_EXTERNAL duk_bool_t duk_is_constructor_call(duk_hthread *thr) { duk_activation *act; DUK_ASSERT_API_ENTRY(thr); act = thr->callstack_curr; if (act != NULL) { return ((act->flags & DUK_ACT_FLAG_CONSTRUCT) != 0 ? 1 : 0); } return 0; } DUK_EXTERNAL void duk_require_constructor_call(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); if (!duk_is_constructor_call(thr)) { DUK_ERROR_TYPE(thr, DUK_STR_CONSTRUCT_ONLY); DUK_WO_NORETURN(return;); } } DUK_EXTERNAL duk_bool_t duk_is_strict_call(duk_hthread *thr) { duk_activation *act; /* For user code this could just return 1 (strict) always * because all Duktape/C functions are considered strict, * and strict is also the default when nothing is running. * However, Duktape may call this function internally when * the current activation is an ECMAScript function, so * this cannot be replaced by a 'return 1' without fixing * the internal call sites. */ DUK_ASSERT_API_ENTRY(thr); act = thr->callstack_curr; if (act != NULL) { return ((act->flags & DUK_ACT_FLAG_STRICT) != 0 ? 1 : 0); } else { /* Strict by default. */ return 1; } } /* * Duktape/C function magic */ DUK_EXTERNAL duk_int_t duk_get_current_magic(duk_hthread *thr) { duk_activation *act; duk_hobject *func; DUK_ASSERT_API_ENTRY(thr); act = thr->callstack_curr; if (act) { func = DUK_ACT_GET_FUNC(act); if (!func) { duk_tval *tv = &act->tv_func; duk_small_uint_t lf_flags; lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv); return (duk_int_t) DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags); } DUK_ASSERT(func != NULL); if (DUK_HOBJECT_IS_NATFUNC(func)) { duk_hnatfunc *nf = (duk_hnatfunc *) func; return (duk_int_t) nf->magic; } } return 0; } DUK_EXTERNAL duk_int_t duk_get_magic(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, idx); if (DUK_TVAL_IS_OBJECT(tv)) { h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (!DUK_HOBJECT_HAS_NATFUNC(h)) { goto type_error; } return (duk_int_t) ((duk_hnatfunc *) h)->magic; } else if (DUK_TVAL_IS_LIGHTFUNC(tv)) { duk_small_uint_t lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv); return (duk_int_t) DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags); } /* fall through */ type_error: DUK_ERROR_TYPE(thr, DUK_STR_UNEXPECTED_TYPE); DUK_WO_NORETURN(return 0;); } DUK_EXTERNAL void duk_set_magic(duk_hthread *thr, duk_idx_t idx, duk_int_t magic) { duk_hnatfunc *nf; DUK_ASSERT_API_ENTRY(thr); nf = duk_require_hnatfunc(thr, idx); DUK_ASSERT(nf != NULL); nf->magic = (duk_int16_t) magic; } /* * Misc helpers */ /* Resolve a bound function on value stack top to a non-bound target * (leave other values as is). */ DUK_INTERNAL void duk_resolve_nonbound_function(duk_hthread *thr) { duk_tval *tv; DUK_HTHREAD_ASSERT_VALID(thr); tv = DUK_GET_TVAL_NEGIDX(thr, -1); if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h; h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (DUK_HOBJECT_HAS_BOUNDFUNC(h)) { duk_push_tval(thr, &((duk_hboundfunc *) (void *) h)->target); duk_replace(thr, -2); #if 0 DUK_TVAL_SET_TVAL(tv, &((duk_hboundfunc *) h)->target); DUK_TVAL_INCREF(thr, tv); DUK_HOBJECT_DECREF_NORZ(thr, h); #endif /* Rely on Function.prototype.bind() on never creating a bound * function whose target is not proper. This is now safe * because the target is not even an internal property but a * struct member. */ DUK_ASSERT(duk_is_lightfunc(thr, -1) || duk_is_callable(thr, -1)); } } /* Lightfuncs cannot be bound but are always callable and * constructable. */ } /* * Encoding and decoding basic formats: hex, base64. * * These are in-place operations which may allow an optimized implementation. * * Base-64: https://tools.ietf.org/html/rfc4648#section-4 */ /* #include duk_internal.h -> already included */ /* * Misc helpers */ /* Shared handling for encode/decode argument. Fast path handling for * buffer and string values because they're the most common. In particular, * avoid creating a temporary string or buffer when possible. Return value * is guaranteed to be non-NULL, even for zero length input. */ DUK_LOCAL const duk_uint8_t *duk__prep_codec_arg(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_len) { const void *def_ptr = (const void *) out_len; /* Any non-NULL pointer will do. */ const void *ptr; duk_bool_t isbuffer; DUK_ASSERT(out_len != NULL); DUK_ASSERT(def_ptr != NULL); DUK_ASSERT(duk_is_valid_index(thr, idx)); /* checked by caller */ ptr = (const void *) duk_get_buffer_data_raw(thr, idx, out_len, NULL /*def_ptr*/, 0 /*def_size*/, 0 /*throw_flag*/, &isbuffer); if (isbuffer) { DUK_ASSERT(ptr != NULL || *out_len == 0U); if (DUK_UNLIKELY(ptr == NULL)) { ptr = def_ptr; } DUK_ASSERT(ptr != NULL); } else { /* For strings a non-NULL pointer is always guaranteed because * at least a NUL will be present. */ ptr = (const void *) duk_to_lstring(thr, idx, out_len); DUK_ASSERT(ptr != NULL); } DUK_ASSERT(ptr != NULL); return (const duk_uint8_t *) ptr; } /* * Base64 */ #if defined(DUK_USE_BASE64_SUPPORT) /* Bytes emitted for number of padding characters in range [0,4]. */ DUK_LOCAL const duk_int8_t duk__base64_decode_nequal_step[5] = { 3, /* #### -> 24 bits, emit 3 bytes */ 2, /* ###= -> 18 bits, emit 2 bytes */ 1, /* ##== -> 12 bits, emit 1 byte */ -1, /* #=== -> 6 bits, error */ 0, /* ==== -> 0 bits, emit 0 bytes */ }; #if defined(DUK_USE_BASE64_FASTPATH) DUK_LOCAL const duk_uint8_t duk__base64_enctab_fast[64] = { 0x41U, 0x42U, 0x43U, 0x44U, 0x45U, 0x46U, 0x47U, 0x48U, 0x49U, 0x4aU, 0x4bU, 0x4cU, 0x4dU, 0x4eU, 0x4fU, 0x50U, /* A...P */ 0x51U, 0x52U, 0x53U, 0x54U, 0x55U, 0x56U, 0x57U, 0x58U, 0x59U, 0x5aU, 0x61U, 0x62U, 0x63U, 0x64U, 0x65U, 0x66U, /* Q...f */ 0x67U, 0x68U, 0x69U, 0x6aU, 0x6bU, 0x6cU, 0x6dU, 0x6eU, 0x6fU, 0x70U, 0x71U, 0x72U, 0x73U, 0x74U, 0x75U, 0x76U, /* g...v */ 0x77U, 0x78U, 0x79U, 0x7aU, 0x30U, 0x31U, 0x32U, 0x33U, 0x34U, 0x35U, 0x36U, 0x37U, 0x38U, 0x39U, 0x2bU, 0x2fU /* w.../ */ }; #endif /* DUK_USE_BASE64_FASTPATH */ #if defined(DUK_USE_BASE64_FASTPATH) /* Decode table for one byte of input: * -1 = allowed whitespace * -2 = padding * -3 = error * 0...63 decoded bytes */ DUK_LOCAL const duk_int8_t duk__base64_dectab_fast[256] = { -3, -3, -3, -3, -3, -3, -3, -3, -3, -1, -1, -3, -3, -1, -3, -3, /* 0x00...0x0f */ -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, /* 0x10...0x1f */ -1, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, 62, -3, -3, -3, 63, /* 0x20...0x2f */ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -3, -3, -3, -2, -3, -3, /* 0x30...0x3f */ -3, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 0x40...0x4f */ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -3, -3, -3, -3, -3, /* 0x50...0x5f */ -3, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 0x60...0x6f */ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -3, -3, -3, -3, -3, /* 0x70...0x7f */ -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, /* 0x80...0x8f */ -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, /* 0x90...0x9f */ -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, /* 0xa0...0xaf */ -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, /* 0xb0...0xbf */ -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, /* 0xc0...0xcf */ -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, /* 0xd0...0xdf */ -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, /* 0xe0...0xef */ -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3 /* 0xf0...0xff */ }; #endif /* DUK_USE_BASE64_FASTPATH */ #if defined(DUK_USE_BASE64_FASTPATH) DUK_LOCAL DUK_ALWAYS_INLINE void duk__base64_encode_fast_3(const duk_uint8_t *src, duk_uint8_t *dst) { duk_uint_t t; t = (duk_uint_t) src[0]; t = (t << 8) + (duk_uint_t) src[1]; t = (t << 8) + (duk_uint_t) src[2]; dst[0] = duk__base64_enctab_fast[t >> 18]; dst[1] = duk__base64_enctab_fast[(t >> 12) & 0x3fU]; dst[2] = duk__base64_enctab_fast[(t >> 6) & 0x3fU]; dst[3] = duk__base64_enctab_fast[t & 0x3fU]; #if 0 /* Tested: not faster on x64, most likely due to aliasing between * output and input index computation. */ /* aaaaaabb bbbbcccc ccdddddd */ dst[0] = duk__base64_enctab_fast[(src[0] >> 2) & 0x3fU]; dst[1] = duk__base64_enctab_fast[((src[0] << 4) & 0x30U) | ((src[1] >> 4) & 0x0fU)]; dst[2] = duk__base64_enctab_fast[((src[1] << 2) & 0x3fU) | ((src[2] >> 6) & 0x03U)]; dst[3] = duk__base64_enctab_fast[src[2] & 0x3fU]; #endif } DUK_LOCAL DUK_ALWAYS_INLINE void duk__base64_encode_fast_2(const duk_uint8_t *src, duk_uint8_t *dst) { duk_uint_t t; t = (duk_uint_t) src[0]; t = (t << 8) + (duk_uint_t) src[1]; dst[0] = duk__base64_enctab_fast[t >> 10]; /* XXXXXX-- -------- */ dst[1] = duk__base64_enctab_fast[(t >> 4) & 0x3fU]; /* ------XX XXXX---- */ dst[2] = duk__base64_enctab_fast[(t << 2) & 0x3fU]; /* -------- ----XXXX */ dst[3] = DUK_ASC_EQUALS; } DUK_LOCAL DUK_ALWAYS_INLINE void duk__base64_encode_fast_1(const duk_uint8_t *src, duk_uint8_t *dst) { duk_uint_t t; t = (duk_uint_t) src[0]; dst[0] = duk__base64_enctab_fast[t >> 2]; /* XXXXXX-- */ dst[1] = duk__base64_enctab_fast[(t << 4) & 0x3fU]; /* ------XX */ dst[2] = DUK_ASC_EQUALS; dst[3] = DUK_ASC_EQUALS; } DUK_LOCAL void duk__base64_encode_helper(const duk_uint8_t *src, duk_size_t srclen, duk_uint8_t *dst) { duk_size_t n; const duk_uint8_t *p; duk_uint8_t *q; n = srclen; p = src; q = dst; if (n >= 16U) { /* Fast path, unrolled by 4, allows interleaving. Process * 12-byte input chunks which encode to 16-char output chunks. * Only enter when at least one block is emitted (avoids div+mul * for short inputs too). */ const duk_uint8_t *p_end_fast; p_end_fast = p + ((n / 12U) * 12U); DUK_ASSERT(p_end_fast >= p + 12); do { duk__base64_encode_fast_3(p, q); duk__base64_encode_fast_3(p + 3, q + 4); duk__base64_encode_fast_3(p + 6, q + 8); duk__base64_encode_fast_3(p + 9, q + 12); p += 12; q += 16; } while (DUK_LIKELY(p != p_end_fast)); DUK_ASSERT(src + srclen >= p); n = (duk_size_t) (src + srclen - p); DUK_ASSERT(n < 12U); } /* Remainder. */ while (n >= 3U) { duk__base64_encode_fast_3(p, q); p += 3; q += 4; n -= 3U; } DUK_ASSERT(n == 0U || n == 1U || n == 2U); if (n == 1U) { duk__base64_encode_fast_1(p, q); #if 0 /* Unnecessary. */ p += 1; q += 4; n -= 1U; #endif } else if (n == 2U) { duk__base64_encode_fast_2(p, q); #if 0 /* Unnecessary. */ p += 2; q += 4; n -= 2U; #endif } else { DUK_ASSERT(n == 0U); /* nothing to do */ ; } } #else /* DUK_USE_BASE64_FASTPATH */ DUK_LOCAL void duk__base64_encode_helper(const duk_uint8_t *src, duk_size_t srclen, duk_uint8_t *dst) { duk_small_uint_t i, npad; duk_uint_t t, x, y; const duk_uint8_t *p; const duk_uint8_t *p_end; duk_uint8_t *q; p = src; p_end = src + srclen; q = dst; npad = 0U; while (p < p_end) { /* Read 3 bytes into 't', padded by zero. */ t = 0; for (i = 0; i < 3; i++) { t = t << 8; if (p < p_end) { t += (duk_uint_t) (*p++); } else { /* This only happens on the last loop and we're * guaranteed to exit on the next loop. */ npad++; } } DUK_ASSERT(npad <= 2U); /* Emit 4 encoded characters. If npad > 0, some of the * chars will be incorrect (zero bits) but we fix up the * padding after the loop. A straightforward 64-byte * lookup would be faster and cleaner, but this is shorter. */ for (i = 0; i < 4; i++) { x = ((t >> 18) & 0x3fU); t = t << 6; if (x <= 51U) { if (x <= 25) { y = x + DUK_ASC_UC_A; } else { y = x - 26 + DUK_ASC_LC_A; } } else { if (x <= 61U) { y = x - 52 + DUK_ASC_0; } else if (x == 62) { y = DUK_ASC_PLUS; } else { DUK_ASSERT(x == 63); y = DUK_ASC_SLASH; } } *q++ = (duk_uint8_t) y; } } /* Handle padding by rewriting 0-2 bogus characters at the end. * * Missing bytes npad base64 example * 0 0 #### * 1 1 ###= * 2 2 ##== */ DUK_ASSERT(npad <= 2U); while (npad > 0U) { *(q - npad) = DUK_ASC_EQUALS; npad--; } } #endif /* DUK_USE_BASE64_FASTPATH */ #if defined(DUK_USE_BASE64_FASTPATH) DUK_LOCAL duk_bool_t duk__base64_decode_helper(const duk_uint8_t *src, duk_size_t srclen, duk_uint8_t *dst, duk_uint8_t **out_dst_final) { duk_int_t x; duk_uint_t t; duk_small_uint_t n_equal; duk_int8_t step; const duk_uint8_t *p; const duk_uint8_t *p_end; const duk_uint8_t *p_end_safe; duk_uint8_t *q; DUK_ASSERT(src != NULL); /* Required by pointer arithmetic below, which fails for NULL. */ p = src; p_end = src + srclen; p_end_safe = p_end - 8; /* If 'src <= src_end_safe', safe to read 8 bytes. */ q = dst; /* Alternate between a fast path which processes clean groups with no * padding or whitespace, and a slow path which processes one arbitrary * group and then re-enters the fast path. This handles e.g. base64 * with newlines reasonably well because the majority of a line is in * the fast path. */ for (;;) { /* Fast path, on each loop handle two 4-char input groups. * If both are clean, emit 6 bytes and continue. If first * is clean, emit 3 bytes and drop out; otherwise emit * nothing and drop out. This approach could be extended to * more groups per loop, but for inputs with e.g. periodic * newlines (which are common) it might not be an improvement. */ while (DUK_LIKELY(p <= p_end_safe)) { duk_int_t t1, t2; /* The lookup byte is intentionally sign extended to * (at least) 32 bits and then ORed. This ensures * that is at least 1 byte is negative, the highest * bit of the accumulator will be set at the end and * we don't need to check every byte. * * Read all input bytes first before writing output * bytes to minimize aliasing. */ DUK_DDD(DUK_DDDPRINT("fast loop: p=%p, p_end_safe=%p, p_end=%p", (const void *) p, (const void *) p_end_safe, (const void *) p_end)); t1 = (duk_int_t) duk__base64_dectab_fast[p[0]]; t1 = (duk_int_t) ((duk_uint_t) t1 << 6) | (duk_int_t) duk__base64_dectab_fast[p[1]]; t1 = (duk_int_t) ((duk_uint_t) t1 << 6) | (duk_int_t) duk__base64_dectab_fast[p[2]]; t1 = (duk_int_t) ((duk_uint_t) t1 << 6) | (duk_int_t) duk__base64_dectab_fast[p[3]]; t2 = (duk_int_t) duk__base64_dectab_fast[p[4]]; t2 = (duk_int_t) ((duk_uint_t) t2 << 6) | (duk_int_t) duk__base64_dectab_fast[p[5]]; t2 = (duk_int_t) ((duk_uint_t) t2 << 6) | (duk_int_t) duk__base64_dectab_fast[p[6]]; t2 = (duk_int_t) ((duk_uint_t) t2 << 6) | (duk_int_t) duk__base64_dectab_fast[p[7]]; q[0] = (duk_uint8_t) (((duk_uint_t) t1 >> 16) & 0xffU); q[1] = (duk_uint8_t) (((duk_uint_t) t1 >> 8) & 0xffU); q[2] = (duk_uint8_t) ((duk_uint_t) t1 & 0xffU); q[3] = (duk_uint8_t) (((duk_uint_t) t2 >> 16) & 0xffU); q[4] = (duk_uint8_t) (((duk_uint_t) t2 >> 8) & 0xffU); q[5] = (duk_uint8_t) ((duk_uint_t) t2 & 0xffU); /* Optimistic check using one branch. */ if (DUK_LIKELY((t1 | t2) >= 0)) { p += 8; q += 6; } else if (t1 >= 0) { DUK_DDD(DUK_DDDPRINT("fast loop first group was clean, second was not, process one slow path group")); DUK_ASSERT(t2 < 0); p += 4; q += 3; break; } else { DUK_DDD(DUK_DDDPRINT("fast loop first group was not clean, second does not matter, process one slow path group")); DUK_ASSERT(t1 < 0); break; } } /* fast path */ /* Slow path step 1: try to scan a 4-character encoded group, * end-of-input, or start-of-padding. We exit with: * 1. n_chars == 4: full group, no padding, no end-of-input. * 2. n_chars < 4: partial group (may also be 0), encountered * padding or end of input. * * The accumulator is initialized to 1; this allows us to detect * a full group by comparing >= 0x1000000 without an extra * counter variable. */ t = 1UL; for (;;) { DUK_DDD(DUK_DDDPRINT("slow loop: p=%p, p_end=%p, t=%lu", (const void *) p, (const void *) p_end, (unsigned long) t)); if (DUK_LIKELY(p < p_end)) { x = duk__base64_dectab_fast[*p++]; if (DUK_LIKELY(x >= 0)) { DUK_ASSERT(x >= 0 && x <= 63); t = (t << 6) + (duk_uint_t) x; if (t >= 0x1000000UL) { break; } } else if (x == -1) { continue; /* allowed ascii whitespace */ } else if (x == -2) { p--; break; /* start of padding */ } else { DUK_ASSERT(x == -3); goto decode_error; } } else { break; /* end of input */ } } /* slow path step 1 */ /* Complete the padding by simulating pad characters, * regardless of actual input padding chars. */ n_equal = 0; while (t < 0x1000000UL) { t = (t << 6) + 0U; n_equal++; } /* Slow path step 2: deal with full/partial group, padding, * etc. Note that for num chars in [0,3] we intentionally emit * 3 bytes but don't step forward that much, buffer space is * guaranteed in setup. * * num chars: * 0 #### no output (= step 0) * 1 #=== reject, 6 bits of data * 2 ##== 12 bits of data, output 1 byte (= step 1) * 3 ###= 18 bits of data, output 2 bytes (= step 2) * 4 #### 24 bits of data, output 3 bytes (= step 3) */ q[0] = (duk_uint8_t) ((t >> 16) & 0xffU); q[1] = (duk_uint8_t) ((t >> 8) & 0xffU); q[2] = (duk_uint8_t) (t & 0xffU); DUK_ASSERT(n_equal <= 4); step = duk__base64_decode_nequal_step[n_equal]; if (DUK_UNLIKELY(step < 0)) { goto decode_error; } q += step; /* Slow path step 3: read and ignore padding and whitespace * until (a) next non-padding and non-whitespace character * after which we resume the fast path, or (b) end of input. * This allows us to accept missing, partial, full, and extra * padding cases uniformly. We also support concatenated * base-64 documents because we resume scanning afterwards. * * Note that to support concatenated documents well, the '=' * padding found inside the input must also allow for 'extra' * padding. For example, 'Zm===' decodes to 'f' and has one * extra padding char. So, 'Zm===Zm' should decode 'ff', even * though the standard break-up would be 'Zm==' + '=Zm' which * doesn't make sense. * * We also accept prepended padding like '==Zm9', because it * is equivalent to an empty document with extra padding ('==') * followed by a valid document. */ for (;;) { if (DUK_UNLIKELY(p >= p_end)) { goto done; } x = duk__base64_dectab_fast[*p++]; if (x == -1 || x == -2) { ; /* padding or whitespace, keep eating */ } else { p--; break; /* backtrack and go back to fast path, even for -1 */ } } /* slow path step 3 */ } /* outer fast+slow path loop */ done: DUK_DDD(DUK_DDDPRINT("done; p=%p, p_end=%p", (const void *) p, (const void *) p_end)); DUK_ASSERT(p == p_end); *out_dst_final = q; return 1; decode_error: return 0; } #else /* DUK_USE_BASE64_FASTPATH */ DUK_LOCAL duk_bool_t duk__base64_decode_helper(const duk_uint8_t *src, duk_size_t srclen, duk_uint8_t *dst, duk_uint8_t **out_dst_final) { duk_uint_t t, x; duk_int_t y; duk_int8_t step; const duk_uint8_t *p; const duk_uint8_t *p_end; duk_uint8_t *q; /* 0x09, 0x0a, or 0x0d */ duk_uint32_t mask_white = (1U << 9) | (1U << 10) | (1U << 13); /* 't' tracks progress of the decoded group: * * t == 1 no valid chars yet * t >= 0x40 1x6 = 6 bits shifted in * t >= 0x1000 2x6 = 12 bits shifted in * t >= 0x40000 3x6 = 18 bits shifted in * t >= 0x1000000 4x6 = 24 bits shifted in * * By initializing t=1 there's no need for a separate counter for * the number of characters found so far. */ p = src; p_end = src + srclen; q = dst; t = 1UL; for (;;) { duk_small_uint_t n_equal; DUK_ASSERT(t >= 1U); if (p >= p_end) { /* End of input: if input exists, treat like * start of padding, finish the block, then * re-enter here to see we're done. */ if (t == 1U) { break; } else { goto simulate_padding; } } x = *p++; if (x >= 0x41U) { /* Valid: a-z and A-Z. */ DUK_ASSERT(x >= 0x41U && x <= 0xffU); if (x >= 0x61U && x <= 0x7aU) { y = (duk_int_t) x - 0x61 + 26; } else if (x <= 0x5aU) { y = (duk_int_t) x - 0x41; } else { goto decode_error; } } else if (x >= 0x30U) { /* Valid: 0-9 and =. */ DUK_ASSERT(x >= 0x30U && x <= 0x40U); if (x <= 0x39U) { y = (duk_int_t) x - 0x30 + 52; } else if (x == 0x3dU) { /* Skip padding and whitespace unless we're in the * middle of a block. Otherwise complete group by * simulating shifting in the correct padding. */ if (t == 1U) { continue; } goto simulate_padding; } else { goto decode_error; } } else if (x >= 0x20U) { /* Valid: +, /, and 0x20 whitespace. */ DUK_ASSERT(x >= 0x20U && x <= 0x2fU); if (x == 0x2bU) { y = 62; } else if (x == 0x2fU) { y = 63; } else if (x == 0x20U) { continue; } else { goto decode_error; } } else { /* Valid: whitespace. */ duk_uint32_t m; DUK_ASSERT(x < 0x20U); /* 0x00 to 0x1f */ m = (1U << x); if (mask_white & m) { /* Allow basic ASCII whitespace. */ continue; } else { goto decode_error; } } DUK_ASSERT(y >= 0 && y <= 63); t = (t << 6) + (duk_uint_t) y; if (t < 0x1000000UL) { continue; } /* fall through; no padding will be added */ simulate_padding: n_equal = 0; while (t < 0x1000000UL) { t = (t << 6) + 0U; n_equal++; } /* Output 3 bytes from 't' and advance as needed. */ q[0] = (duk_uint8_t) ((t >> 16) & 0xffU); q[1] = (duk_uint8_t) ((t >> 8) & 0xffU); q[2] = (duk_uint8_t) (t & 0xffU); DUK_ASSERT(n_equal <= 4U); step = duk__base64_decode_nequal_step[n_equal]; if (step < 0) { goto decode_error; } q += step; /* Re-enter loop. The actual padding characters are skipped * by the main loop. This handles cases like missing, partial, * full, and extra padding, and allows parsing of concatenated * documents (with extra padding) like: Zm===Zm. Also extra * prepended padding is accepted: ===Zm9v. */ t = 1U; } DUK_ASSERT(t == 1UL); *out_dst_final = q; return 1; decode_error: return 0; } #endif /* DUK_USE_BASE64_FASTPATH */ DUK_EXTERNAL const char *duk_base64_encode(duk_hthread *thr, duk_idx_t idx) { const duk_uint8_t *src; duk_size_t srclen; duk_size_t dstlen; duk_uint8_t *dst; const char *ret; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); src = duk__prep_codec_arg(thr, idx, &srclen); DUK_ASSERT(src != NULL); /* Compute exact output length. Computation must not wrap; this * limit works for 32-bit size_t: * >>> srclen = 3221225469 * >>> '%x' % ((srclen + 2) / 3 * 4) * 'fffffffc' */ if (srclen > 3221225469UL) { goto type_error; } dstlen = (srclen + 2U) / 3U * 4U; dst = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, dstlen); duk__base64_encode_helper((const duk_uint8_t *) src, srclen, dst); ret = duk_buffer_to_string(thr, -1); /* Safe, result is ASCII. */ duk_replace(thr, idx); return ret; type_error: DUK_ERROR_TYPE(thr, DUK_STR_BASE64_ENCODE_FAILED); DUK_WO_NORETURN(return NULL;); } DUK_EXTERNAL void duk_base64_decode(duk_hthread *thr, duk_idx_t idx) { const duk_uint8_t *src; duk_size_t srclen; duk_size_t dstlen; duk_uint8_t *dst; duk_uint8_t *dst_final; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); src = duk__prep_codec_arg(thr, idx, &srclen); DUK_ASSERT(src != NULL); /* Round up and add safety margin. Avoid addition before division to * avoid possibility of wrapping. Margin includes +3 for rounding up, * and +3 for one extra group: the decoder may emit and then backtrack * a full group (3 bytes) from zero-sized input for technical reasons. * Similarly, 'xx' may ecause 1+3 = bytes to be emitted and then * backtracked. */ dstlen = (srclen / 4) * 3 + 6; /* upper limit, assuming no whitespace etc */ dst = (duk_uint8_t *) duk_push_dynamic_buffer(thr, dstlen); /* Note: for dstlen=0, dst may be NULL */ if (!duk__base64_decode_helper((const duk_uint8_t *) src, srclen, dst, &dst_final)) { goto type_error; } /* XXX: convert to fixed buffer? */ (void) duk_resize_buffer(thr, -1, (duk_size_t) (dst_final - dst)); duk_replace(thr, idx); return; type_error: DUK_ERROR_TYPE(thr, DUK_STR_BASE64_DECODE_FAILED); DUK_WO_NORETURN(return;); } #else /* DUK_USE_BASE64_SUPPORT */ DUK_EXTERNAL const char *duk_base64_encode(duk_hthread *thr, duk_idx_t idx) { DUK_UNREF(idx); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_base64_decode(duk_hthread *thr, duk_idx_t idx) { DUK_UNREF(idx); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } #endif /* DUK_USE_BASE64_SUPPORT */ /* * Hex */ #if defined(DUK_USE_HEX_SUPPORT) DUK_EXTERNAL const char *duk_hex_encode(duk_hthread *thr, duk_idx_t idx) { const duk_uint8_t *inp; duk_size_t len; duk_size_t i; duk_uint8_t *buf; const char *ret; #if defined(DUK_USE_HEX_FASTPATH) duk_size_t len_safe; duk_uint16_t *p16; #endif DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); inp = duk__prep_codec_arg(thr, idx, &len); DUK_ASSERT(inp != NULL); /* Fixed buffer, no zeroing because we'll fill all the data. */ buf = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, len * 2); DUK_ASSERT(buf != NULL); #if defined(DUK_USE_HEX_FASTPATH) DUK_ASSERT((((duk_size_t) buf) & 0x01U) == 0); /* pointer is aligned, guaranteed for fixed buffer */ p16 = (duk_uint16_t *) (void *) buf; len_safe = len & ~0x03U; for (i = 0; i < len_safe; i += 4) { p16[0] = duk_hex_enctab[inp[i]]; p16[1] = duk_hex_enctab[inp[i + 1]]; p16[2] = duk_hex_enctab[inp[i + 2]]; p16[3] = duk_hex_enctab[inp[i + 3]]; p16 += 4; } for (; i < len; i++) { *p16++ = duk_hex_enctab[inp[i]]; } #else /* DUK_USE_HEX_FASTPATH */ for (i = 0; i < len; i++) { duk_small_uint_t t; t = (duk_small_uint_t) inp[i]; buf[i*2 + 0] = duk_lc_digits[t >> 4]; buf[i*2 + 1] = duk_lc_digits[t & 0x0f]; } #endif /* DUK_USE_HEX_FASTPATH */ /* XXX: Using a string return value forces a string intern which is * not always necessary. As a rough performance measure, hex encode * time for tests/perf/test-hex-encode.js dropped from ~35s to ~15s * without string coercion. Change to returning a buffer and let the * caller coerce to string if necessary? */ ret = duk_buffer_to_string(thr, -1); /* Safe, result is ASCII. */ duk_replace(thr, idx); return ret; } DUK_EXTERNAL void duk_hex_decode(duk_hthread *thr, duk_idx_t idx) { const duk_uint8_t *inp; duk_size_t len; duk_size_t i; duk_int_t t; duk_uint8_t *buf; #if defined(DUK_USE_HEX_FASTPATH) duk_int_t chk; duk_uint8_t *p; duk_size_t len_safe; #endif DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); inp = duk__prep_codec_arg(thr, idx, &len); DUK_ASSERT(inp != NULL); if (len & 0x01) { goto type_error; } /* Fixed buffer, no zeroing because we'll fill all the data. */ buf = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, len / 2); DUK_ASSERT(buf != NULL); #if defined(DUK_USE_HEX_FASTPATH) p = buf; len_safe = len & ~0x07U; for (i = 0; i < len_safe; i += 8) { t = ((duk_int_t) duk_hex_dectab_shift4[inp[i]]) | ((duk_int_t) duk_hex_dectab[inp[i + 1]]); chk = t; p[0] = (duk_uint8_t) t; t = ((duk_int_t) duk_hex_dectab_shift4[inp[i + 2]]) | ((duk_int_t) duk_hex_dectab[inp[i + 3]]); chk |= t; p[1] = (duk_uint8_t) t; t = ((duk_int_t) duk_hex_dectab_shift4[inp[i + 4]]) | ((duk_int_t) duk_hex_dectab[inp[i + 5]]); chk |= t; p[2] = (duk_uint8_t) t; t = ((duk_int_t) duk_hex_dectab_shift4[inp[i + 6]]) | ((duk_int_t) duk_hex_dectab[inp[i + 7]]); chk |= t; p[3] = (duk_uint8_t) t; p += 4; /* Check if any lookup above had a negative result. */ if (DUK_UNLIKELY(chk < 0)) { goto type_error; } } for (; i < len; i += 2) { /* First cast to duk_int_t to sign extend, second cast to * duk_uint_t to avoid signed left shift, and final cast to * duk_int_t result type. */ t = (duk_int_t) ((((duk_uint_t) (duk_int_t) duk_hex_dectab[inp[i]]) << 4U) | ((duk_uint_t) (duk_int_t) duk_hex_dectab[inp[i + 1]])); if (DUK_UNLIKELY(t < 0)) { goto type_error; } *p++ = (duk_uint8_t) t; } #else /* DUK_USE_HEX_FASTPATH */ for (i = 0; i < len; i += 2) { /* For invalid characters the value -1 gets extended to * at least 16 bits. If either nybble is invalid, the * resulting 't' will be < 0. */ t = (duk_int_t) ((((duk_uint_t) (duk_int_t) duk_hex_dectab[inp[i]]) << 4U) | ((duk_uint_t) (duk_int_t) duk_hex_dectab[inp[i + 1]])); if (DUK_UNLIKELY(t < 0)) { goto type_error; } buf[i >> 1] = (duk_uint8_t) t; } #endif /* DUK_USE_HEX_FASTPATH */ duk_replace(thr, idx); return; type_error: DUK_ERROR_TYPE(thr, DUK_STR_HEX_DECODE_FAILED); DUK_WO_NORETURN(return;); } #else /* DUK_USE_HEX_SUPPORT */ DUK_EXTERNAL const char *duk_hex_encode(duk_hthread *thr, duk_idx_t idx) { DUK_UNREF(idx); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return NULL;); } DUK_EXTERNAL void duk_hex_decode(duk_hthread *thr, duk_idx_t idx) { DUK_UNREF(idx); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } #endif /* DUK_USE_HEX_SUPPORT */ /* * JSON */ #if defined(DUK_USE_JSON_SUPPORT) DUK_EXTERNAL const char *duk_json_encode(duk_hthread *thr, duk_idx_t idx) { #if defined(DUK_USE_ASSERTIONS) duk_idx_t top_at_entry; #endif const char *ret; DUK_ASSERT_API_ENTRY(thr); #if defined(DUK_USE_ASSERTIONS) top_at_entry = duk_get_top(thr); #endif idx = duk_require_normalize_index(thr, idx); duk_bi_json_stringify_helper(thr, idx /*idx_value*/, DUK_INVALID_INDEX /*idx_replacer*/, DUK_INVALID_INDEX /*idx_space*/, 0 /*flags*/); DUK_ASSERT(duk_is_string(thr, -1)); duk_replace(thr, idx); ret = duk_get_string(thr, idx); DUK_ASSERT(duk_get_top(thr) == top_at_entry); return ret; } DUK_EXTERNAL void duk_json_decode(duk_hthread *thr, duk_idx_t idx) { #if defined(DUK_USE_ASSERTIONS) duk_idx_t top_at_entry; #endif DUK_ASSERT_API_ENTRY(thr); #if defined(DUK_USE_ASSERTIONS) top_at_entry = duk_get_top(thr); #endif idx = duk_require_normalize_index(thr, idx); duk_bi_json_parse_helper(thr, idx /*idx_value*/, DUK_INVALID_INDEX /*idx_reviver*/, 0 /*flags*/); duk_replace(thr, idx); DUK_ASSERT(duk_get_top(thr) == top_at_entry); } #else /* DUK_USE_JSON_SUPPORT */ DUK_EXTERNAL const char *duk_json_encode(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(idx); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return NULL;); } DUK_EXTERNAL void duk_json_decode(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(idx); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } #endif /* DUK_USE_JSON_SUPPORT */ /* * Compilation and evaluation */ /* #include duk_internal.h -> already included */ typedef struct duk__compile_raw_args duk__compile_raw_args; struct duk__compile_raw_args { duk_size_t src_length; /* should be first on 64-bit platforms */ const duk_uint8_t *src_buffer; duk_uint_t flags; }; /* Eval is just a wrapper now. */ DUK_EXTERNAL duk_int_t duk_eval_raw(duk_hthread *thr, const char *src_buffer, duk_size_t src_length, duk_uint_t flags) { duk_int_t rc; DUK_ASSERT_API_ENTRY(thr); /* Note: strictness is *not* inherited from the current Duktape/C. * This would be confusing because the current strictness state * depends on whether we're running inside a Duktape/C activation * (= strict mode) or outside of any activation (= non-strict mode). * See tests/api/test-eval-strictness.c for more discussion. */ /* [ ... source? filename? ] (depends on flags) */ rc = duk_compile_raw(thr, src_buffer, src_length, flags | DUK_COMPILE_EVAL); /* may be safe, or non-safe depending on flags */ /* [ ... closure/error ] */ if (rc != DUK_EXEC_SUCCESS) { rc = DUK_EXEC_ERROR; goto got_rc; } duk_push_global_object(thr); /* explicit 'this' binding, see GH-164 */ if (flags & DUK_COMPILE_SAFE) { rc = duk_pcall_method(thr, 0); } else { duk_call_method(thr, 0); rc = DUK_EXEC_SUCCESS; } /* [ ... result/error ] */ got_rc: if (flags & DUK_COMPILE_NORESULT) { duk_pop(thr); } return rc; } /* Helper which can be called both directly and with duk_safe_call(). */ DUK_LOCAL duk_ret_t duk__do_compile(duk_hthread *thr, void *udata) { duk__compile_raw_args *comp_args; duk_uint_t flags; duk_hcompfunc *h_templ; DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(udata != NULL); /* Note: strictness is not inherited from the current Duktape/C * context. Otherwise it would not be possible to compile * non-strict code inside a Duktape/C activation (which is * always strict now). See tests/api/test-eval-strictness.c * for discussion. */ /* [ ... source? filename? ] (depends on flags) */ comp_args = (duk__compile_raw_args *) udata; flags = comp_args->flags; if (flags & DUK_COMPILE_NOFILENAME) { /* Automatic filename: 'eval' or 'input'. */ duk_push_hstring_stridx(thr, (flags & DUK_COMPILE_EVAL) ? DUK_STRIDX_EVAL : DUK_STRIDX_INPUT); } /* [ ... source? filename ] */ if (!comp_args->src_buffer) { duk_hstring *h_sourcecode; h_sourcecode = duk_get_hstring(thr, -2); if ((flags & DUK_COMPILE_NOSOURCE) || /* args incorrect */ (h_sourcecode == NULL)) { /* e.g. duk_push_string_file_raw() pushed undefined */ DUK_ERROR_TYPE(thr, DUK_STR_NO_SOURCECODE); DUK_WO_NORETURN(return 0;); } DUK_ASSERT(h_sourcecode != NULL); comp_args->src_buffer = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_sourcecode); comp_args->src_length = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h_sourcecode); } DUK_ASSERT(comp_args->src_buffer != NULL); if (flags & DUK_COMPILE_FUNCTION) { flags |= DUK_COMPILE_EVAL | DUK_COMPILE_FUNCEXPR; } /* [ ... source? filename ] */ duk_js_compile(thr, comp_args->src_buffer, comp_args->src_length, flags); /* [ ... source? func_template ] */ if (flags & DUK_COMPILE_NOSOURCE) { ; } else { duk_remove_m2(thr); } /* [ ... func_template ] */ h_templ = (duk_hcompfunc *) duk_known_hobject(thr, -1); duk_js_push_closure(thr, h_templ, thr->builtins[DUK_BIDX_GLOBAL_ENV], thr->builtins[DUK_BIDX_GLOBAL_ENV], 1 /*add_auto_proto*/); duk_remove_m2(thr); /* -> [ ... closure ] */ /* [ ... closure ] */ return 1; } DUK_EXTERNAL duk_int_t duk_compile_raw(duk_hthread *thr, const char *src_buffer, duk_size_t src_length, duk_uint_t flags) { duk__compile_raw_args comp_args_alloc; duk__compile_raw_args *comp_args = &comp_args_alloc; DUK_ASSERT_API_ENTRY(thr); if ((flags & DUK_COMPILE_STRLEN) && (src_buffer != NULL)) { /* String length is computed here to avoid multiple evaluation * of a macro argument in the calling side. */ src_length = DUK_STRLEN(src_buffer); } comp_args->src_buffer = (const duk_uint8_t *) src_buffer; comp_args->src_length = src_length; comp_args->flags = flags; /* [ ... source? filename? ] (depends on flags) */ if (flags & DUK_COMPILE_SAFE) { duk_int_t rc; duk_int_t nargs; duk_int_t nrets = 1; /* Arguments can be: [ source? filename? &comp_args] so that * nargs is 1 to 3. Call site encodes the correct nargs count * directly into flags. */ nargs = flags & 0x07; DUK_ASSERT(nargs == ((flags & DUK_COMPILE_NOSOURCE) ? 0 : 1) + ((flags & DUK_COMPILE_NOFILENAME) ? 0 : 1)); rc = duk_safe_call(thr, duk__do_compile, (void *) comp_args, nargs, nrets); /* [ ... closure ] */ return rc; } (void) duk__do_compile(thr, (void *) comp_args); /* [ ... closure ] */ return DUK_EXEC_SUCCESS; } /* * Debugging related API calls */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_JSON_SUPPORT) DUK_EXTERNAL void duk_push_context_dump(duk_hthread *thr) { duk_idx_t idx; duk_idx_t top; DUK_ASSERT_API_ENTRY(thr); /* We don't duk_require_stack() here now, but rely on the caller having * enough space. */ top = duk_get_top(thr); duk_push_bare_array(thr); for (idx = 0; idx < top; idx++) { duk_dup(thr, idx); duk_put_prop_index(thr, -2, (duk_uarridx_t) idx); } /* XXX: conversion errors should not propagate outwards. * Perhaps values need to be coerced individually? */ duk_bi_json_stringify_helper(thr, duk_get_top_index(thr), /*idx_value*/ DUK_INVALID_INDEX, /*idx_replacer*/ DUK_INVALID_INDEX, /*idx_space*/ DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_ASCII_ONLY | DUK_JSON_FLAG_AVOID_KEY_QUOTES /*flags*/); duk_push_sprintf(thr, "ctx: top=%ld, stack=%s", (long) top, (const char *) duk_safe_to_string(thr, -1)); duk_replace(thr, -3); /* [ ... arr jsonx(arr) res ] -> [ ... res jsonx(arr) ] */ duk_pop(thr); DUK_ASSERT(duk_is_string(thr, -1)); } #else /* DUK_USE_JSON_SUPPORT */ DUK_EXTERNAL void duk_push_context_dump(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } #endif /* DUK_USE_JSON_SUPPORT */ #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_EXTERNAL void duk_debugger_attach(duk_hthread *thr, duk_debug_read_function read_cb, duk_debug_write_function write_cb, duk_debug_peek_function peek_cb, duk_debug_read_flush_function read_flush_cb, duk_debug_write_flush_function write_flush_cb, duk_debug_request_function request_cb, duk_debug_detached_function detached_cb, void *udata) { duk_heap *heap; const char *str; duk_size_t len; /* XXX: should there be an error or an automatic detach if * already attached? */ DUK_D(DUK_DPRINT("application called duk_debugger_attach()")); DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(read_cb != NULL); DUK_ASSERT(write_cb != NULL); /* Other callbacks are optional. */ heap = thr->heap; heap->dbg_read_cb = read_cb; heap->dbg_write_cb = write_cb; heap->dbg_peek_cb = peek_cb; heap->dbg_read_flush_cb = read_flush_cb; heap->dbg_write_flush_cb = write_flush_cb; heap->dbg_request_cb = request_cb; heap->dbg_detached_cb = detached_cb; heap->dbg_udata = udata; heap->dbg_have_next_byte = 0; /* Start in paused state. */ heap->dbg_processing = 0; heap->dbg_state_dirty = 0; heap->dbg_force_restart = 0; heap->dbg_pause_flags = 0; heap->dbg_pause_act = NULL; heap->dbg_pause_startline = 0; heap->dbg_exec_counter = 0; heap->dbg_last_counter = 0; heap->dbg_last_time = 0.0; duk_debug_set_paused(heap); /* XXX: overlap with fields above */ /* Send version identification and flush right afterwards. Note that * we must write raw, unframed bytes here. */ duk_push_sprintf(thr, "%ld %ld %s %s\n", (long) DUK_DEBUG_PROTOCOL_VERSION, (long) DUK_VERSION, (const char *) DUK_GIT_DESCRIBE, (const char *) DUK_USE_TARGET_INFO); str = duk_get_lstring(thr, -1, &len); DUK_ASSERT(str != NULL); duk_debug_write_bytes(thr, (const duk_uint8_t *) str, len); duk_debug_write_flush(thr); duk_pop(thr); } DUK_EXTERNAL void duk_debugger_detach(duk_hthread *thr) { DUK_D(DUK_DPRINT("application called duk_debugger_detach()")); DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->heap != NULL); /* Can be called multiple times with no harm. */ duk_debug_do_detach(thr->heap); } DUK_EXTERNAL void duk_debugger_cooperate(duk_hthread *thr) { duk_bool_t processed_messages; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->heap != NULL); if (!duk_debug_is_attached(thr->heap)) { return; } if (thr->callstack_curr != NULL || thr->heap->dbg_processing) { /* Calling duk_debugger_cooperate() while Duktape is being * called into is not supported. This is not a 100% check * but prevents any damage in most cases. */ return; } processed_messages = duk_debug_process_messages(thr, 1 /*no_block*/); DUK_UNREF(processed_messages); } DUK_EXTERNAL duk_bool_t duk_debugger_notify(duk_hthread *thr, duk_idx_t nvalues) { duk_idx_t top; duk_idx_t idx; duk_bool_t ret = 0; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->heap != NULL); DUK_D(DUK_DPRINT("application called duk_debugger_notify() with nvalues=%ld", (long) nvalues)); top = duk_get_top(thr); if (top < nvalues) { DUK_ERROR_RANGE(thr, "not enough stack values for notify"); DUK_WO_NORETURN(return 0;); } if (duk_debug_is_attached(thr->heap)) { duk_debug_write_notify(thr, DUK_DBG_CMD_APPNOTIFY); for (idx = top - nvalues; idx < top; idx++) { duk_tval *tv = DUK_GET_TVAL_POSIDX(thr, idx); duk_debug_write_tval(thr, tv); } duk_debug_write_eom(thr); /* Return non-zero (true) if we have a good reason to believe * the notify was delivered; if we're still attached at least * a transport error was not indicated by the transport write * callback. This is not a 100% guarantee of course. */ if (duk_debug_is_attached(thr->heap)) { ret = 1; } } duk_pop_n(thr, nvalues); return ret; } DUK_EXTERNAL void duk_debugger_pause(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->heap != NULL); DUK_D(DUK_DPRINT("application called duk_debugger_pause()")); /* Treat like a debugger statement: ignore when not attached. */ if (duk_debug_is_attached(thr->heap)) { if (duk_debug_is_paused(thr->heap)) { DUK_D(DUK_DPRINT("duk_debugger_pause() called when already paused; ignoring")); } else { duk_debug_set_paused(thr->heap); /* Pause on the next opcode executed. This is always safe to do even * inside the debugger message loop: the interrupt counter will be reset * to its proper value when the message loop exits. */ thr->interrupt_init = 1; thr->interrupt_counter = 0; } } } #else /* DUK_USE_DEBUGGER_SUPPORT */ DUK_EXTERNAL void duk_debugger_attach(duk_hthread *thr, duk_debug_read_function read_cb, duk_debug_write_function write_cb, duk_debug_peek_function peek_cb, duk_debug_read_flush_function read_flush_cb, duk_debug_write_flush_function write_flush_cb, duk_debug_request_function request_cb, duk_debug_detached_function detached_cb, void *udata) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(read_cb); DUK_UNREF(write_cb); DUK_UNREF(peek_cb); DUK_UNREF(read_flush_cb); DUK_UNREF(write_flush_cb); DUK_UNREF(request_cb); DUK_UNREF(detached_cb); DUK_UNREF(udata); DUK_ERROR_TYPE(thr, "no debugger support"); DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_debugger_detach(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ERROR_TYPE(thr, "no debugger support"); DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_debugger_cooperate(duk_hthread *thr) { /* nop */ DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(thr); } DUK_EXTERNAL duk_bool_t duk_debugger_notify(duk_hthread *thr, duk_idx_t nvalues) { duk_idx_t top; DUK_ASSERT_API_ENTRY(thr); top = duk_get_top(thr); if (top < nvalues) { DUK_ERROR_RANGE_INVALID_COUNT(thr); DUK_WO_NORETURN(return 0;); } /* No debugger support, just pop values. */ duk_pop_n(thr, nvalues); return 0; } DUK_EXTERNAL void duk_debugger_pause(duk_hthread *thr) { /* Treat like debugger statement: nop */ DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(thr); } #endif /* DUK_USE_DEBUGGER_SUPPORT */ /* * Heap creation and destruction */ /* #include duk_internal.h -> already included */ typedef struct duk_internal_thread_state duk_internal_thread_state; struct duk_internal_thread_state { duk_ljstate lj; duk_bool_t creating_error; duk_hthread *curr_thread; duk_int_t call_recursion_depth; }; DUK_EXTERNAL duk_hthread *duk_create_heap(duk_alloc_function alloc_func, duk_realloc_function realloc_func, duk_free_function free_func, void *heap_udata, duk_fatal_function fatal_handler) { duk_heap *heap = NULL; duk_hthread *thr; /* Assume that either all memory funcs are NULL or non-NULL, mixed * cases will now be unsafe. */ /* XXX: just assert non-NULL values here and make caller arguments * do the defaulting to the default implementations (smaller code)? */ if (!alloc_func) { DUK_ASSERT(realloc_func == NULL); DUK_ASSERT(free_func == NULL); #if defined(DUK_USE_PROVIDE_DEFAULT_ALLOC_FUNCTIONS) alloc_func = duk_default_alloc_function; realloc_func = duk_default_realloc_function; free_func = duk_default_free_function; #else DUK_D(DUK_DPRINT("no allocation functions given and no default providers")); return NULL; #endif } else { DUK_ASSERT(realloc_func != NULL); DUK_ASSERT(free_func != NULL); } if (!fatal_handler) { fatal_handler = duk_default_fatal_handler; } DUK_ASSERT(alloc_func != NULL); DUK_ASSERT(realloc_func != NULL); DUK_ASSERT(free_func != NULL); DUK_ASSERT(fatal_handler != NULL); heap = duk_heap_alloc(alloc_func, realloc_func, free_func, heap_udata, fatal_handler); if (!heap) { return NULL; } thr = heap->heap_thread; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); return thr; } DUK_EXTERNAL void duk_destroy_heap(duk_hthread *thr) { duk_heap *heap; if (!thr) { return; } DUK_ASSERT_API_ENTRY(thr); heap = thr->heap; DUK_ASSERT(heap != NULL); duk_heap_free(heap); } DUK_EXTERNAL void duk_suspend(duk_hthread *thr, duk_thread_state *state) { duk_internal_thread_state *snapshot = (duk_internal_thread_state *) (void *) state; duk_heap *heap; duk_ljstate *lj; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(state != NULL); /* unvalidated */ /* Currently not supported when called from within a finalizer. * If that is done, the finalizer will remain running indefinitely, * preventing other finalizers from executing. The assert is a bit * wider, checking that it would be OK to run pending finalizers. */ DUK_ASSERT(thr->heap->pf_prevent_count == 0); /* Currently not supported to duk_suspend() from an errCreate() * call. */ DUK_ASSERT(thr->heap->creating_error == 0); heap = thr->heap; lj = &heap->lj; duk_push_tval(thr, &lj->value1); duk_push_tval(thr, &lj->value2); /* XXX: creating_error == 0 is asserted above, so no need to store. */ duk_memcpy((void *) &snapshot->lj, (const void *) lj, sizeof(duk_ljstate)); snapshot->creating_error = heap->creating_error; snapshot->curr_thread = heap->curr_thread; snapshot->call_recursion_depth = heap->call_recursion_depth; lj->jmpbuf_ptr = NULL; lj->type = DUK_LJ_TYPE_UNKNOWN; DUK_TVAL_SET_UNDEFINED(&lj->value1); DUK_TVAL_SET_UNDEFINED(&lj->value2); heap->creating_error = 0; heap->curr_thread = NULL; heap->call_recursion_depth = 0; } DUK_EXTERNAL void duk_resume(duk_hthread *thr, const duk_thread_state *state) { const duk_internal_thread_state *snapshot = (const duk_internal_thread_state *) (const void *) state; duk_heap *heap; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(state != NULL); /* unvalidated */ /* Shouldn't be necessary if duk_suspend() is called before * duk_resume(), but assert in case API sequence is incorrect. */ DUK_ASSERT(thr->heap->pf_prevent_count == 0); DUK_ASSERT(thr->heap->creating_error == 0); heap = thr->heap; duk_memcpy((void *) &heap->lj, (const void *) &snapshot->lj, sizeof(duk_ljstate)); heap->creating_error = snapshot->creating_error; heap->curr_thread = snapshot->curr_thread; heap->call_recursion_depth = snapshot->call_recursion_depth; duk_pop_2(thr); } /* XXX: better place for this */ DUK_EXTERNAL void duk_set_global_object(duk_hthread *thr) { duk_hobject *h_glob; duk_hobject *h_prev_glob; duk_hobjenv *h_env; duk_hobject *h_prev_env; DUK_ASSERT_API_ENTRY(thr); DUK_D(DUK_DPRINT("replace global object with: %!T", duk_get_tval(thr, -1))); h_glob = duk_require_hobject(thr, -1); DUK_ASSERT(h_glob != NULL); /* * Replace global object. */ h_prev_glob = thr->builtins[DUK_BIDX_GLOBAL]; DUK_UNREF(h_prev_glob); thr->builtins[DUK_BIDX_GLOBAL] = h_glob; DUK_HOBJECT_INCREF(thr, h_glob); DUK_HOBJECT_DECREF_ALLOWNULL(thr, h_prev_glob); /* side effects, in theory (referenced by global env) */ /* * Replace lexical environment for global scope * * Create a new object environment for the global lexical scope. * We can't just reset the _Target property of the current one, * because the lexical scope is shared by other threads with the * same (initial) built-ins. */ h_env = duk_hobjenv_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJENV)); DUK_ASSERT(h_env != NULL); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) h_env) == NULL); DUK_ASSERT(h_env->target == NULL); DUK_ASSERT(h_glob != NULL); h_env->target = h_glob; DUK_HOBJECT_INCREF(thr, h_glob); DUK_ASSERT(h_env->has_this == 0); /* [ ... new_glob ] */ h_prev_env = thr->builtins[DUK_BIDX_GLOBAL_ENV]; thr->builtins[DUK_BIDX_GLOBAL_ENV] = (duk_hobject *) h_env; DUK_HOBJECT_INCREF(thr, (duk_hobject *) h_env); DUK_HOBJECT_DECREF_ALLOWNULL(thr, h_prev_env); /* side effects */ DUK_UNREF(h_env); /* without refcounts */ DUK_UNREF(h_prev_env); /* [ ... new_glob ] */ duk_pop(thr); /* [ ... ] */ } /* * Inspection */ /* #include duk_internal.h -> already included */ /* For footprint efficient multiple value setting: arrays are much better than * varargs, format string with parsing is often better than string pointer arrays. */ DUK_LOCAL void duk__inspect_multiple_uint(duk_hthread *thr, const char *fmt, duk_int_t *vals) { duk_int_t val; const char *p; const char *p_curr; duk_size_t len; for (p = fmt;;) { len = DUK_STRLEN(p); p_curr = p; p += len + 1; if (len == 0) { /* Double NUL (= empty key) terminates. */ break; } val = *vals++; if (val >= 0) { /* Negative values are markers to skip key. */ duk_push_string(thr, p_curr); duk_push_int(thr, val); duk_put_prop(thr, -3); } } } /* Raw helper to extract internal information / statistics about a value. * The return value is an object with properties that are version specific. * The properties must not expose anything that would lead to security * issues (e.g. exposing compiled function 'data' buffer might be an issue). * Currently only counts and sizes and such are given so there shouldn't * be security implications. */ #define DUK__IDX_TYPE 0 #define DUK__IDX_ITAG 1 #define DUK__IDX_REFC 2 #define DUK__IDX_HBYTES 3 #define DUK__IDX_CLASS 4 #define DUK__IDX_PBYTES 5 #define DUK__IDX_ESIZE 6 #define DUK__IDX_ENEXT 7 #define DUK__IDX_ASIZE 8 #define DUK__IDX_HSIZE 9 #define DUK__IDX_BCBYTES 10 #define DUK__IDX_DBYTES 11 #define DUK__IDX_TSTATE 12 #define DUK__IDX_VARIANT 13 DUK_EXTERNAL void duk_inspect_value(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_heaphdr *h; /* The temporary values should be in an array rather than individual * variables which (in practice) ensures that the compiler won't map * them to registers and emit a lot of unnecessary shuffling code. */ duk_int_t vals[14]; DUK_ASSERT_API_ENTRY(thr); /* Assume two's complement and set everything to -1. */ duk_memset((void *) &vals, (int) 0xff, sizeof(vals)); DUK_ASSERT(vals[DUK__IDX_TYPE] == -1); /* spot check one */ tv = duk_get_tval_or_unused(thr, idx); h = (DUK_TVAL_IS_HEAP_ALLOCATED(tv) ? DUK_TVAL_GET_HEAPHDR(tv) : NULL); vals[DUK__IDX_TYPE] = duk_get_type_tval(tv); vals[DUK__IDX_ITAG] = (duk_int_t) DUK_TVAL_GET_TAG(tv); duk_push_bare_object(thr); /* Invalidates 'tv'. */ tv = NULL; if (h == NULL) { goto finish; } duk_push_pointer(thr, (void *) h); duk_put_prop_literal(thr, -2, "hptr"); #if 0 /* Covers a lot of information, e.g. buffer and string variants. */ duk_push_uint(thr, (duk_uint_t) DUK_HEAPHDR_GET_FLAGS(h)); duk_put_prop_literal(thr, -2, "hflags"); #endif #if defined(DUK_USE_REFERENCE_COUNTING) vals[DUK__IDX_REFC] = (duk_int_t) DUK_HEAPHDR_GET_REFCOUNT(h); #endif vals[DUK__IDX_VARIANT] = 0; /* Heaphdr size and additional allocation size, followed by * type specific stuff (with varying value count). */ switch ((duk_small_int_t) DUK_HEAPHDR_GET_TYPE(h)) { case DUK_HTYPE_STRING: { duk_hstring *h_str = (duk_hstring *) h; vals[DUK__IDX_HBYTES] = (duk_int_t) (sizeof(duk_hstring) + DUK_HSTRING_GET_BYTELEN(h_str) + 1); #if defined(DUK_USE_HSTRING_EXTDATA) if (DUK_HSTRING_HAS_EXTDATA(h_str)) { vals[DUK__IDX_VARIANT] = 1; } #endif break; } case DUK_HTYPE_OBJECT: { duk_hobject *h_obj = (duk_hobject *) h; /* XXX: variants here are maybe pointless; class is enough? */ if (DUK_HOBJECT_IS_ARRAY(h_obj)) { vals[DUK__IDX_HBYTES] = sizeof(duk_harray); } else if (DUK_HOBJECT_IS_COMPFUNC(h_obj)) { vals[DUK__IDX_HBYTES] = sizeof(duk_hcompfunc); } else if (DUK_HOBJECT_IS_NATFUNC(h_obj)) { vals[DUK__IDX_HBYTES] = sizeof(duk_hnatfunc); } else if (DUK_HOBJECT_IS_THREAD(h_obj)) { vals[DUK__IDX_HBYTES] = sizeof(duk_hthread); vals[DUK__IDX_TSTATE] = ((duk_hthread *) h_obj)->state; #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) } else if (DUK_HOBJECT_IS_BUFOBJ(h_obj)) { vals[DUK__IDX_HBYTES] = sizeof(duk_hbufobj); /* XXX: some size information */ #endif } else { vals[DUK__IDX_HBYTES] = (duk_small_uint_t) sizeof(duk_hobject); } vals[DUK__IDX_CLASS] = (duk_int_t) DUK_HOBJECT_GET_CLASS_NUMBER(h_obj); vals[DUK__IDX_PBYTES] = (duk_int_t) DUK_HOBJECT_P_ALLOC_SIZE(h_obj); vals[DUK__IDX_ESIZE] = (duk_int_t) DUK_HOBJECT_GET_ESIZE(h_obj); vals[DUK__IDX_ENEXT] = (duk_int_t) DUK_HOBJECT_GET_ENEXT(h_obj); vals[DUK__IDX_ASIZE] = (duk_int_t) DUK_HOBJECT_GET_ASIZE(h_obj); vals[DUK__IDX_HSIZE] = (duk_int_t) DUK_HOBJECT_GET_HSIZE(h_obj); /* Note: e_next indicates the number of gc-reachable entries * in the entry part, and also indicates the index where the * next new property would be inserted. It does *not* indicate * the number of non-NULL keys present in the object. That * value could be counted separately but requires a pass through * the key list. */ if (DUK_HOBJECT_IS_COMPFUNC(h_obj)) { duk_hbuffer *h_data = (duk_hbuffer *) DUK_HCOMPFUNC_GET_DATA(thr->heap, (duk_hcompfunc *) h_obj); vals[DUK__IDX_BCBYTES] = (duk_int_t) (h_data ? DUK_HBUFFER_GET_SIZE(h_data) : 0); } break; } case DUK_HTYPE_BUFFER: { duk_hbuffer *h_buf = (duk_hbuffer *) h; if (DUK_HBUFFER_HAS_DYNAMIC(h_buf)) { if (DUK_HBUFFER_HAS_EXTERNAL(h_buf)) { vals[DUK__IDX_VARIANT] = 2; /* buffer variant 2: external */ vals[DUK__IDX_HBYTES] = (duk_uint_t) (sizeof(duk_hbuffer_external)); } else { /* When alloc_size == 0 the second allocation may not * actually exist. */ vals[DUK__IDX_VARIANT] = 1; /* buffer variant 1: dynamic */ vals[DUK__IDX_HBYTES] = (duk_uint_t) (sizeof(duk_hbuffer_dynamic)); } vals[DUK__IDX_DBYTES] = (duk_int_t) (DUK_HBUFFER_GET_SIZE(h_buf)); } else { DUK_ASSERT(vals[DUK__IDX_VARIANT] == 0); /* buffer variant 0: fixed */ vals[DUK__IDX_HBYTES] = (duk_int_t) (sizeof(duk_hbuffer_fixed) + DUK_HBUFFER_GET_SIZE(h_buf)); } break; } } finish: duk__inspect_multiple_uint(thr, "type" "\x00" "itag" "\x00" "refc" "\x00" "hbytes" "\x00" "class" "\x00" "pbytes" "\x00" "esize" "\x00" "enext" "\x00" "asize" "\x00" "hsize" "\x00" "bcbytes" "\x00" "dbytes" "\x00" "tstate" "\x00" "variant" "\x00" "\x00", (duk_int_t *) &vals); } DUK_EXTERNAL void duk_inspect_callstack_entry(duk_hthread *thr, duk_int_t level) { duk_activation *act; duk_uint_fast32_t pc; duk_uint_fast32_t line; DUK_ASSERT_API_ENTRY(thr); /* -1 = top callstack entry * -2 = caller of level -1 * etc */ act = duk_hthread_get_activation_for_level(thr, level); if (act == NULL) { duk_push_undefined(thr); return; } duk_push_bare_object(thr); /* Relevant PC is just before current one because PC is * post-incremented. This should match what error augment * code does. */ pc = duk_hthread_get_act_prev_pc(thr, act); duk_push_tval(thr, &act->tv_func); duk_push_uint(thr, (duk_uint_t) pc); duk_put_prop_stridx_short(thr, -3, DUK_STRIDX_PC); #if defined(DUK_USE_PC2LINE) line = duk_hobject_pc2line_query(thr, -1, pc); #else line = 0; #endif duk_push_uint(thr, (duk_uint_t) line); duk_put_prop_stridx_short(thr, -3, DUK_STRIDX_LINE_NUMBER); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_LC_FUNCTION); /* Providing access to e.g. act->lex_env would be dangerous: these * internal structures must never be accessible to the application. * Duktape relies on them having consistent data, and this consistency * is only asserted for, not checked for. */ } /* automatic undefs */ #undef DUK__IDX_ASIZE #undef DUK__IDX_BCBYTES #undef DUK__IDX_CLASS #undef DUK__IDX_DBYTES #undef DUK__IDX_ENEXT #undef DUK__IDX_ESIZE #undef DUK__IDX_HBYTES #undef DUK__IDX_HSIZE #undef DUK__IDX_ITAG #undef DUK__IDX_PBYTES #undef DUK__IDX_REFC #undef DUK__IDX_TSTATE #undef DUK__IDX_TYPE #undef DUK__IDX_VARIANT /* * Memory calls. */ /* #include duk_internal.h -> already included */ DUK_EXTERNAL void *duk_alloc_raw(duk_hthread *thr, duk_size_t size) { DUK_ASSERT_API_ENTRY(thr); return DUK_ALLOC_RAW(thr->heap, size); } DUK_EXTERNAL void duk_free_raw(duk_hthread *thr, void *ptr) { DUK_ASSERT_API_ENTRY(thr); DUK_FREE_RAW(thr->heap, ptr); } DUK_EXTERNAL void *duk_realloc_raw(duk_hthread *thr, void *ptr, duk_size_t size) { DUK_ASSERT_API_ENTRY(thr); return DUK_REALLOC_RAW(thr->heap, ptr, size); } DUK_EXTERNAL void *duk_alloc(duk_hthread *thr, duk_size_t size) { DUK_ASSERT_API_ENTRY(thr); return DUK_ALLOC(thr->heap, size); } DUK_EXTERNAL void duk_free(duk_hthread *thr, void *ptr) { DUK_ASSERT_API_ENTRY(thr); DUK_FREE_CHECKED(thr, ptr); } DUK_EXTERNAL void *duk_realloc(duk_hthread *thr, void *ptr, duk_size_t size) { DUK_ASSERT_API_ENTRY(thr); /* * Note: since this is an exposed API call, there should be * no way a mark-and-sweep could have a side effect on the * memory allocation behind 'ptr'; the pointer should never * be something that Duktape wants to change. * * Thus, no need to use DUK_REALLOC_INDIRECT (and we don't * have the storage location here anyway). */ return DUK_REALLOC(thr->heap, ptr, size); } DUK_EXTERNAL void duk_get_memory_functions(duk_hthread *thr, duk_memory_functions *out_funcs) { duk_heap *heap; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(out_funcs != NULL); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); heap = thr->heap; out_funcs->alloc_func = heap->alloc_func; out_funcs->realloc_func = heap->realloc_func; out_funcs->free_func = heap->free_func; out_funcs->udata = heap->heap_udata; } DUK_EXTERNAL void duk_gc(duk_hthread *thr, duk_uint_t flags) { duk_heap *heap; duk_small_uint_t ms_flags; DUK_ASSERT_API_ENTRY(thr); heap = thr->heap; DUK_ASSERT(heap != NULL); DUK_D(DUK_DPRINT("mark-and-sweep requested by application")); DUK_ASSERT(DUK_GC_COMPACT == DUK_MS_FLAG_EMERGENCY); /* Compact flag is 1:1 with emergency flag which forces compaction. */ ms_flags = (duk_small_uint_t) flags; duk_heap_mark_and_sweep(heap, ms_flags); } /* * Object handling: property access and other support functions. */ /* #include duk_internal.h -> already included */ /* * Property handling * * The API exposes only the most common property handling functions. * The caller can invoke ECMAScript built-ins for full control (e.g. * defineProperty, getOwnPropertyDescriptor). */ DUK_EXTERNAL duk_bool_t duk_get_prop(duk_hthread *thr, duk_idx_t obj_idx) { duk_tval *tv_obj; duk_tval *tv_key; duk_bool_t rc; DUK_ASSERT_API_ENTRY(thr); /* Note: copying tv_obj and tv_key to locals to shield against a valstack * resize is not necessary for a property get right now. */ tv_obj = duk_require_tval(thr, obj_idx); tv_key = duk_require_tval(thr, -1); rc = duk_hobject_getprop(thr, tv_obj, tv_key); DUK_ASSERT(rc == 0 || rc == 1); /* a value is left on stack regardless of rc */ duk_remove_m2(thr); /* remove key */ DUK_ASSERT(duk_is_undefined(thr, -1) || rc == 1); return rc; /* 1 if property found, 0 otherwise */ } DUK_EXTERNAL duk_bool_t duk_get_prop_string(duk_hthread *thr, duk_idx_t obj_idx, const char *key) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_string(thr, key); return duk_get_prop(thr, obj_idx); } DUK_EXTERNAL duk_bool_t duk_get_prop_lstring(duk_hthread *thr, duk_idx_t obj_idx, const char *key, duk_size_t key_len) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_lstring(thr, key, key_len); return duk_get_prop(thr, obj_idx); } #if !defined(DUK_USE_PREFER_SIZE) DUK_EXTERNAL duk_bool_t duk_get_prop_literal_raw(duk_hthread *thr, duk_idx_t obj_idx, const char *key, duk_size_t key_len) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); DUK_ASSERT(key[key_len] == (char) 0); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_literal_raw(thr, key, key_len); return duk_get_prop(thr, obj_idx); } #endif DUK_EXTERNAL duk_bool_t duk_get_prop_index(duk_hthread *thr, duk_idx_t obj_idx, duk_uarridx_t arr_idx) { DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); duk_push_uarridx(thr, arr_idx); return duk_get_prop(thr, obj_idx); } DUK_EXTERNAL duk_bool_t duk_get_prop_heapptr(duk_hthread *thr, duk_idx_t obj_idx, void *ptr) { DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_heapptr(thr, ptr); /* NULL -> 'undefined' */ return duk_get_prop(thr, obj_idx); } DUK_INTERNAL duk_bool_t duk_get_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_STRIDX_VALID(stridx); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_hstring(thr, DUK_HTHREAD_GET_STRING(thr, stridx)); return duk_get_prop(thr, obj_idx); } DUK_INTERNAL duk_bool_t duk_get_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args) { return duk_get_prop_stridx(thr, (duk_idx_t) (duk_int16_t) (packed_args >> 16), (duk_small_uint_t) (packed_args & 0xffffUL)); } DUK_INTERNAL duk_bool_t duk_get_prop_stridx_boolean(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx, duk_bool_t *out_has_prop) { duk_bool_t rc; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_STRIDX_VALID(stridx); rc = duk_get_prop_stridx(thr, obj_idx, stridx); if (out_has_prop) { *out_has_prop = rc; } return duk_to_boolean_top_pop(thr); } /* This get variant is for internal use, it differs from standard * duk_get_prop() in that: * - Object argument must be an object (primitive values not supported). * - Key argument must be a string (no coercion). * - Only own properties are checked (no inheritance). Only "entry part" * properties are checked (not array index properties). * - Property must be a plain data property, not a getter. * - Proxy traps are not triggered. */ DUK_INTERNAL duk_bool_t duk_xget_owndataprop(duk_hthread *thr, duk_idx_t obj_idx) { duk_hobject *h_obj; duk_hstring *h_key; duk_tval *tv_val; DUK_ASSERT_API_ENTRY(thr); /* Note: copying tv_obj and tv_key to locals to shield against a valstack * resize is not necessary for a property get right now. */ h_obj = duk_get_hobject(thr, obj_idx); if (h_obj == NULL) { return 0; } h_key = duk_require_hstring(thr, -1); tv_val = duk_hobject_find_entry_tval_ptr(thr->heap, h_obj, h_key); if (tv_val == NULL) { return 0; } duk_push_tval(thr, tv_val); duk_remove_m2(thr); /* remove key */ return 1; } DUK_INTERNAL duk_bool_t duk_xget_owndataprop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_STRIDX_VALID(stridx); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_hstring(thr, DUK_HTHREAD_GET_STRING(thr, stridx)); return duk_xget_owndataprop(thr, obj_idx); } DUK_INTERNAL duk_bool_t duk_xget_owndataprop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args) { return duk_xget_owndataprop_stridx(thr, (duk_idx_t) (duk_int16_t) (packed_args >> 16), (duk_small_uint_t) (packed_args & 0xffffUL)); } DUK_LOCAL duk_bool_t duk__put_prop_shared(duk_hthread *thr, duk_idx_t obj_idx, duk_idx_t idx_key) { duk_tval *tv_obj; duk_tval *tv_key; duk_tval *tv_val; duk_bool_t throw_flag; duk_bool_t rc; /* Note: copying tv_obj and tv_key to locals to shield against a valstack * resize is not necessary for a property put right now (putprop protects * against it internally). */ /* Key and value indices are either (-2, -1) or (-1, -2). Given idx_key, * idx_val is always (idx_key ^ 0x01). */ DUK_ASSERT((idx_key == -2 && (idx_key ^ 1) == -1) || (idx_key == -1 && (idx_key ^ 1) == -2)); /* XXX: Direct access; faster validation. */ tv_obj = duk_require_tval(thr, obj_idx); tv_key = duk_require_tval(thr, idx_key); tv_val = duk_require_tval(thr, idx_key ^ 1); throw_flag = duk_is_strict_call(thr); rc = duk_hobject_putprop(thr, tv_obj, tv_key, tv_val, throw_flag); DUK_ASSERT(rc == 0 || rc == 1); duk_pop_2(thr); /* remove key and value */ return rc; /* 1 if property found, 0 otherwise */ } DUK_EXTERNAL duk_bool_t duk_put_prop(duk_hthread *thr, duk_idx_t obj_idx) { DUK_ASSERT_API_ENTRY(thr); return duk__put_prop_shared(thr, obj_idx, -2); } DUK_EXTERNAL duk_bool_t duk_put_prop_string(duk_hthread *thr, duk_idx_t obj_idx, const char *key) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); /* Careful here and with other duk_put_prop_xxx() helpers: the * target object and the property value may be in the same value * stack slot (unusual, but still conceptually clear). */ obj_idx = duk_normalize_index(thr, obj_idx); (void) duk_push_string(thr, key); return duk__put_prop_shared(thr, obj_idx, -1); } DUK_EXTERNAL duk_bool_t duk_put_prop_lstring(duk_hthread *thr, duk_idx_t obj_idx, const char *key, duk_size_t key_len) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); obj_idx = duk_normalize_index(thr, obj_idx); (void) duk_push_lstring(thr, key, key_len); return duk__put_prop_shared(thr, obj_idx, -1); } #if !defined(DUK_USE_PREFER_SIZE) DUK_EXTERNAL duk_bool_t duk_put_prop_literal_raw(duk_hthread *thr, duk_idx_t obj_idx, const char *key, duk_size_t key_len) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); DUK_ASSERT(key[key_len] == (char) 0); obj_idx = duk_normalize_index(thr, obj_idx); (void) duk_push_literal_raw(thr, key, key_len); return duk__put_prop_shared(thr, obj_idx, -1); } #endif DUK_EXTERNAL duk_bool_t duk_put_prop_index(duk_hthread *thr, duk_idx_t obj_idx, duk_uarridx_t arr_idx) { DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); duk_push_uarridx(thr, arr_idx); return duk__put_prop_shared(thr, obj_idx, -1); } DUK_EXTERNAL duk_bool_t duk_put_prop_heapptr(duk_hthread *thr, duk_idx_t obj_idx, void *ptr) { DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_heapptr(thr, ptr); /* NULL -> 'undefined' */ return duk__put_prop_shared(thr, obj_idx, -1); } DUK_INTERNAL duk_bool_t duk_put_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_STRIDX_VALID(stridx); obj_idx = duk_require_normalize_index(thr, obj_idx); duk_push_hstring(thr, DUK_HTHREAD_GET_STRING(thr, stridx)); return duk__put_prop_shared(thr, obj_idx, -1); } DUK_INTERNAL duk_bool_t duk_put_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args) { return duk_put_prop_stridx(thr, (duk_idx_t) (duk_int16_t) (packed_args >> 16), (duk_small_uint_t) (packed_args & 0xffffUL)); } DUK_EXTERNAL duk_bool_t duk_del_prop(duk_hthread *thr, duk_idx_t obj_idx) { duk_tval *tv_obj; duk_tval *tv_key; duk_bool_t throw_flag; duk_bool_t rc; DUK_ASSERT_API_ENTRY(thr); /* Note: copying tv_obj and tv_key to locals to shield against a valstack * resize is not necessary for a property delete right now. */ tv_obj = duk_require_tval(thr, obj_idx); tv_key = duk_require_tval(thr, -1); throw_flag = duk_is_strict_call(thr); rc = duk_hobject_delprop(thr, tv_obj, tv_key, throw_flag); DUK_ASSERT(rc == 0 || rc == 1); duk_pop(thr); /* remove key */ return rc; } DUK_EXTERNAL duk_bool_t duk_del_prop_string(duk_hthread *thr, duk_idx_t obj_idx, const char *key) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_string(thr, key); return duk_del_prop(thr, obj_idx); } DUK_EXTERNAL duk_bool_t duk_del_prop_lstring(duk_hthread *thr, duk_idx_t obj_idx, const char *key, duk_size_t key_len) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_lstring(thr, key, key_len); return duk_del_prop(thr, obj_idx); } #if !defined(DUK_USE_PREFER_SIZE) DUK_EXTERNAL duk_bool_t duk_del_prop_literal_raw(duk_hthread *thr, duk_idx_t obj_idx, const char *key, duk_size_t key_len) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); DUK_ASSERT(key[key_len] == (char) 0); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_literal_raw(thr, key, key_len); return duk_del_prop(thr, obj_idx); } #endif DUK_EXTERNAL duk_bool_t duk_del_prop_index(duk_hthread *thr, duk_idx_t obj_idx, duk_uarridx_t arr_idx) { DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); duk_push_uarridx(thr, arr_idx); return duk_del_prop(thr, obj_idx); } DUK_EXTERNAL duk_bool_t duk_del_prop_heapptr(duk_hthread *thr, duk_idx_t obj_idx, void *ptr) { DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_heapptr(thr, ptr); /* NULL -> 'undefined' */ return duk_del_prop(thr, obj_idx); } DUK_INTERNAL duk_bool_t duk_del_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_STRIDX_VALID(stridx); obj_idx = duk_require_normalize_index(thr, obj_idx); duk_push_hstring(thr, DUK_HTHREAD_GET_STRING(thr, stridx)); return duk_del_prop(thr, obj_idx); } #if 0 DUK_INTERNAL duk_bool_t duk_del_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args) { return duk_del_prop_stridx(thr, (duk_idx_t) (duk_int16_t) (packed_args >> 16), (duk_small_uint_t) (packed_args & 0xffffUL)); } #endif DUK_EXTERNAL duk_bool_t duk_has_prop(duk_hthread *thr, duk_idx_t obj_idx) { duk_tval *tv_obj; duk_tval *tv_key; duk_bool_t rc; DUK_ASSERT_API_ENTRY(thr); /* Note: copying tv_obj and tv_key to locals to shield against a valstack * resize is not necessary for a property existence check right now. */ tv_obj = duk_require_tval(thr, obj_idx); tv_key = duk_require_tval(thr, -1); rc = duk_hobject_hasprop(thr, tv_obj, tv_key); DUK_ASSERT(rc == 0 || rc == 1); duk_pop(thr); /* remove key */ return rc; /* 1 if property found, 0 otherwise */ } DUK_EXTERNAL duk_bool_t duk_has_prop_string(duk_hthread *thr, duk_idx_t obj_idx, const char *key) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_string(thr, key); return duk_has_prop(thr, obj_idx); } DUK_EXTERNAL duk_bool_t duk_has_prop_lstring(duk_hthread *thr, duk_idx_t obj_idx, const char *key, duk_size_t key_len) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_lstring(thr, key, key_len); return duk_has_prop(thr, obj_idx); } #if !defined(DUK_USE_PREFER_SIZE) DUK_EXTERNAL duk_bool_t duk_has_prop_literal_raw(duk_hthread *thr, duk_idx_t obj_idx, const char *key, duk_size_t key_len) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(key != NULL); DUK_ASSERT(key[key_len] == (char) 0); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_literal_raw(thr, key, key_len); return duk_has_prop(thr, obj_idx); } #endif DUK_EXTERNAL duk_bool_t duk_has_prop_index(duk_hthread *thr, duk_idx_t obj_idx, duk_uarridx_t arr_idx) { DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); duk_push_uarridx(thr, arr_idx); return duk_has_prop(thr, obj_idx); } DUK_EXTERNAL duk_bool_t duk_has_prop_heapptr(duk_hthread *thr, duk_idx_t obj_idx, void *ptr) { DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); (void) duk_push_heapptr(thr, ptr); /* NULL -> 'undefined' */ return duk_has_prop(thr, obj_idx); } DUK_INTERNAL duk_bool_t duk_has_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_STRIDX_VALID(stridx); obj_idx = duk_require_normalize_index(thr, obj_idx); duk_push_hstring(thr, DUK_HTHREAD_GET_STRING(thr, stridx)); return duk_has_prop(thr, obj_idx); } #if 0 DUK_INTERNAL duk_bool_t duk_has_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args) { return duk_has_prop_stridx(thr, (duk_idx_t) (duk_int16_t) (packed_args >> 16), (duk_small_uint_t) (packed_args & 0xffffUL)); } #endif /* Define own property without inheritance lookups and such. This differs from * [[DefineOwnProperty]] because special behaviors (like Array 'length') are * not invoked by this method. The caller must be careful to invoke any such * behaviors if necessary. */ DUK_INTERNAL void duk_xdef_prop(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t desc_flags) { duk_hobject *obj; duk_hstring *key; DUK_ASSERT_API_ENTRY(thr); obj = duk_require_hobject(thr, obj_idx); DUK_ASSERT(obj != NULL); key = duk_to_property_key_hstring(thr, -2); DUK_ASSERT(key != NULL); DUK_ASSERT(duk_require_tval(thr, -1) != NULL); duk_hobject_define_property_internal(thr, obj, key, desc_flags); duk_pop(thr); /* pop key */ } DUK_INTERNAL void duk_xdef_prop_index(duk_hthread *thr, duk_idx_t obj_idx, duk_uarridx_t arr_idx, duk_small_uint_t desc_flags) { duk_hobject *obj; DUK_ASSERT_API_ENTRY(thr); obj = duk_require_hobject(thr, obj_idx); DUK_ASSERT(obj != NULL); duk_hobject_define_property_internal_arridx(thr, obj, arr_idx, desc_flags); /* value popped by call */ } DUK_INTERNAL void duk_xdef_prop_stridx(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx, duk_small_uint_t desc_flags) { duk_hobject *obj; duk_hstring *key; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_STRIDX_VALID(stridx); obj = duk_require_hobject(thr, obj_idx); DUK_ASSERT(obj != NULL); key = DUK_HTHREAD_GET_STRING(thr, stridx); DUK_ASSERT(key != NULL); DUK_ASSERT(duk_require_tval(thr, -1) != NULL); duk_hobject_define_property_internal(thr, obj, key, desc_flags); /* value popped by call */ } DUK_INTERNAL void duk_xdef_prop_stridx_short_raw(duk_hthread *thr, duk_uint_t packed_args) { duk_xdef_prop_stridx(thr, (duk_idx_t) (duk_int8_t) (packed_args >> 24), (duk_small_uint_t) (packed_args >> 8) & 0xffffUL, (duk_small_uint_t) (packed_args & 0xffL)); } #if 0 /*unused*/ DUK_INTERNAL void duk_xdef_prop_stridx_builtin(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx, duk_small_int_t builtin_idx, duk_small_uint_t desc_flags) { duk_hobject *obj; duk_hstring *key; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_STRIDX_VALID(stridx); DUK_ASSERT_BIDX_VALID(builtin_idx); obj = duk_require_hobject(thr, obj_idx); DUK_ASSERT(obj != NULL); key = DUK_HTHREAD_GET_STRING(thr, stridx); DUK_ASSERT(key != NULL); duk_push_hobject(thr, thr->builtins[builtin_idx]); duk_hobject_define_property_internal(thr, obj, key, desc_flags); /* value popped by call */ } #endif /* This is a rare property helper; it sets the global thrower (E5 Section 13.2.3) * setter/getter into an object property. This is needed by the 'arguments' * object creation code, function instance creation code, and Function.prototype.bind(). */ DUK_INTERNAL void duk_xdef_prop_stridx_thrower(duk_hthread *thr, duk_idx_t obj_idx, duk_small_uint_t stridx) { DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); duk_push_hstring_stridx(thr, stridx); duk_push_hobject_bidx(thr, DUK_BIDX_TYPE_ERROR_THROWER); duk_dup_top(thr); duk_def_prop(thr, obj_idx, DUK_DEFPROP_HAVE_SETTER | DUK_DEFPROP_HAVE_GETTER | DUK_DEFPROP_FORCE); /* attributes always 0 */ } /* Object.getOwnPropertyDescriptor() equivalent C binding. */ DUK_EXTERNAL void duk_get_prop_desc(duk_hthread *thr, duk_idx_t obj_idx, duk_uint_t flags) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(flags); /* no flags defined yet */ duk_hobject_object_get_own_property_descriptor(thr, obj_idx); /* [ ... key ] -> [ ... desc ] */ } /* Object.defineProperty() equivalent C binding. */ DUK_EXTERNAL void duk_def_prop(duk_hthread *thr, duk_idx_t obj_idx, duk_uint_t flags) { duk_idx_t idx_base; duk_hobject *obj; duk_hstring *key; duk_idx_t idx_value; duk_hobject *get; duk_hobject *set; duk_uint_t is_data_desc; duk_uint_t is_acc_desc; DUK_ASSERT_API_ENTRY(thr); obj = duk_require_hobject(thr, obj_idx); is_data_desc = flags & (DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_HAVE_WRITABLE); is_acc_desc = flags & (DUK_DEFPROP_HAVE_GETTER | DUK_DEFPROP_HAVE_SETTER); if (is_data_desc && is_acc_desc) { /* "Have" flags must not be conflicting so that they would * apply to both a plain property and an accessor at the same * time. */ goto fail_invalid_desc; } idx_base = duk_get_top_index(thr); if (flags & DUK_DEFPROP_HAVE_SETTER) { duk_require_type_mask(thr, idx_base, DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC); set = duk_get_hobject_promote_lfunc(thr, idx_base); if (set != NULL && !DUK_HOBJECT_IS_CALLABLE(set)) { goto fail_not_callable; } idx_base--; } else { set = NULL; } if (flags & DUK_DEFPROP_HAVE_GETTER) { duk_require_type_mask(thr, idx_base, DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC); get = duk_get_hobject_promote_lfunc(thr, idx_base); if (get != NULL && !DUK_HOBJECT_IS_CALLABLE(get)) { goto fail_not_callable; } idx_base--; } else { get = NULL; } if (flags & DUK_DEFPROP_HAVE_VALUE) { idx_value = idx_base; idx_base--; } else { idx_value = (duk_idx_t) -1; } key = duk_to_property_key_hstring(thr, idx_base); DUK_ASSERT(key != NULL); duk_require_valid_index(thr, idx_base); duk_hobject_define_property_helper(thr, flags /*defprop_flags*/, obj, key, idx_value, get, set, 1 /*throw_flag*/); /* Clean up stack */ duk_set_top(thr, idx_base); /* [ ... obj ... ] */ return; fail_invalid_desc: DUK_ERROR_TYPE(thr, DUK_STR_INVALID_DESCRIPTOR); DUK_WO_NORETURN(return;); fail_not_callable: DUK_ERROR_TYPE(thr, DUK_STR_NOT_CALLABLE); DUK_WO_NORETURN(return;); } /* * Object related */ DUK_EXTERNAL void duk_compact(duk_hthread *thr, duk_idx_t obj_idx) { duk_hobject *obj; DUK_ASSERT_API_ENTRY(thr); obj = duk_get_hobject(thr, obj_idx); if (obj) { /* Note: this may fail, caller should protect the call if necessary */ duk_hobject_compact_props(thr, obj); } } DUK_INTERNAL void duk_compact_m1(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_compact(thr, -1); } /* XXX: the duk_hobject_enum.c stack APIs should be reworked */ DUK_EXTERNAL void duk_enum(duk_hthread *thr, duk_idx_t obj_idx, duk_uint_t enum_flags) { DUK_ASSERT_API_ENTRY(thr); duk_dup(thr, obj_idx); duk_require_hobject_promote_mask(thr, -1, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); duk_hobject_enumerator_create(thr, enum_flags); /* [target] -> [enum] */ } DUK_EXTERNAL duk_bool_t duk_next(duk_hthread *thr, duk_idx_t enum_index, duk_bool_t get_value) { DUK_ASSERT_API_ENTRY(thr); duk_require_hobject(thr, enum_index); duk_dup(thr, enum_index); return duk_hobject_enumerator_next(thr, get_value); } DUK_INTERNAL void duk_seal_freeze_raw(duk_hthread *thr, duk_idx_t obj_idx, duk_bool_t is_freeze) { duk_tval *tv; duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, obj_idx); DUK_ASSERT(tv != NULL); /* Seal/freeze are quite rare in practice so it'd be nice to get the * correct behavior simply via automatic promotion (at the cost of some * memory churn). However, the promoted objects don't behave the same, * e.g. promoted lightfuncs are extensible. */ switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_BUFFER: /* Plain buffer: already sealed, but not frozen (and can't be frozen * because index properties can't be made non-writable. */ if (is_freeze) { goto fail_cannot_freeze; } break; case DUK_TAG_LIGHTFUNC: /* Lightfunc: already sealed and frozen, success. */ break; case DUK_TAG_OBJECT: h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (is_freeze && DUK_HOBJECT_IS_BUFOBJ(h)) { /* Buffer objects cannot be frozen because there's no internal * support for making virtual array indices non-writable. */ DUK_DD(DUK_DDPRINT("cannot freeze a buffer object")); goto fail_cannot_freeze; } duk_hobject_object_seal_freeze_helper(thr, h, is_freeze); /* Sealed and frozen objects cannot gain any more properties, * so this is a good time to compact them. */ duk_hobject_compact_props(thr, h); break; default: /* ES2015 Sections 19.1.2.5, 19.1.2.17 */ break; } return; fail_cannot_freeze: DUK_ERROR_TYPE_INVALID_ARGS(thr); /* XXX: proper error message */ DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_seal(duk_hthread *thr, duk_idx_t obj_idx) { DUK_ASSERT_API_ENTRY(thr); duk_seal_freeze_raw(thr, obj_idx, 0 /*is_freeze*/); } DUK_EXTERNAL void duk_freeze(duk_hthread *thr, duk_idx_t obj_idx) { DUK_ASSERT_API_ENTRY(thr); duk_seal_freeze_raw(thr, obj_idx, 1 /*is_freeze*/); } /* * Helpers for writing multiple properties */ DUK_EXTERNAL void duk_put_function_list(duk_hthread *thr, duk_idx_t obj_idx, const duk_function_list_entry *funcs) { const duk_function_list_entry *ent = funcs; DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); if (ent != NULL) { while (ent->key != NULL) { duk_push_c_function(thr, ent->value, ent->nargs); duk_put_prop_string(thr, obj_idx, ent->key); ent++; } } } DUK_EXTERNAL void duk_put_number_list(duk_hthread *thr, duk_idx_t obj_idx, const duk_number_list_entry *numbers) { const duk_number_list_entry *ent = numbers; duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); obj_idx = duk_require_normalize_index(thr, obj_idx); if (ent != NULL) { while (ent->key != NULL) { tv = thr->valstack_top++; DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv)); /* value stack init policy */ DUK_TVAL_SET_NUMBER_CHKFAST_SLOW(tv, ent->value); /* no need for decref/incref */ duk_put_prop_string(thr, obj_idx, ent->key); ent++; } } } /* * Shortcut for accessing global object properties */ DUK_EXTERNAL duk_bool_t duk_get_global_string(duk_hthread *thr, const char *key) { duk_bool_t ret; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); /* XXX: direct implementation */ duk_push_hobject(thr, thr->builtins[DUK_BIDX_GLOBAL]); ret = duk_get_prop_string(thr, -1, key); duk_remove_m2(thr); return ret; } DUK_EXTERNAL duk_bool_t duk_get_global_lstring(duk_hthread *thr, const char *key, duk_size_t key_len) { duk_bool_t ret; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); /* XXX: direct implementation */ duk_push_hobject(thr, thr->builtins[DUK_BIDX_GLOBAL]); ret = duk_get_prop_lstring(thr, -1, key, key_len); duk_remove_m2(thr); return ret; } #if !defined(DUK_USE_PREFER_SIZE) DUK_EXTERNAL duk_bool_t duk_get_global_literal_raw(duk_hthread *thr, const char *key, duk_size_t key_len) { duk_bool_t ret; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); DUK_ASSERT(key[key_len] == (char) 0); /* XXX: direct implementation */ duk_push_hobject(thr, thr->builtins[DUK_BIDX_GLOBAL]); ret = duk_get_prop_literal_raw(thr, -1, key, key_len); duk_remove_m2(thr); return ret; } #endif DUK_EXTERNAL duk_bool_t duk_get_global_heapptr(duk_hthread *thr, void *ptr) { duk_bool_t ret; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); /* XXX: direct implementation */ duk_push_hobject(thr, thr->builtins[DUK_BIDX_GLOBAL]); ret = duk_get_prop_heapptr(thr, -1, ptr); duk_remove_m2(thr); return ret; } DUK_EXTERNAL duk_bool_t duk_put_global_string(duk_hthread *thr, const char *key) { duk_bool_t ret; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); /* XXX: direct implementation */ duk_push_hobject(thr, thr->builtins[DUK_BIDX_GLOBAL]); duk_insert(thr, -2); ret = duk_put_prop_string(thr, -2, key); /* [ ... global val ] -> [ ... global ] */ duk_pop(thr); return ret; } DUK_EXTERNAL duk_bool_t duk_put_global_lstring(duk_hthread *thr, const char *key, duk_size_t key_len) { duk_bool_t ret; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); /* XXX: direct implementation */ duk_push_hobject(thr, thr->builtins[DUK_BIDX_GLOBAL]); duk_insert(thr, -2); ret = duk_put_prop_lstring(thr, -2, key, key_len); /* [ ... global val ] -> [ ... global ] */ duk_pop(thr); return ret; } #if !defined(DUK_USE_PREFER_SIZE) DUK_EXTERNAL duk_bool_t duk_put_global_literal_raw(duk_hthread *thr, const char *key, duk_size_t key_len) { duk_bool_t ret; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); DUK_ASSERT(key[key_len] == (char) 0); /* XXX: direct implementation */ duk_push_hobject(thr, thr->builtins[DUK_BIDX_GLOBAL]); duk_insert(thr, -2); ret = duk_put_prop_literal_raw(thr, -2, key, key_len); /* [ ... global val ] -> [ ... global ] */ duk_pop(thr); return ret; } #endif DUK_EXTERNAL duk_bool_t duk_put_global_heapptr(duk_hthread *thr, void *ptr) { duk_bool_t ret; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); /* XXX: direct implementation */ duk_push_hobject(thr, thr->builtins[DUK_BIDX_GLOBAL]); duk_insert(thr, -2); ret = duk_put_prop_heapptr(thr, -2, ptr); /* [ ... global val ] -> [ ... global ] */ duk_pop(thr); return ret; } /* * ES2015 GetMethod() */ DUK_INTERNAL duk_bool_t duk_get_method_stridx(duk_hthread *thr, duk_idx_t idx, duk_small_uint_t stridx) { (void) duk_get_prop_stridx(thr, idx, stridx); if (duk_is_null_or_undefined(thr, -1)) { duk_pop_nodecref_unsafe(thr); return 0; } if (!duk_is_callable(thr, -1)) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_CALLABLE); DUK_WO_NORETURN(return 0;); } return 1; } /* * Object prototype */ DUK_EXTERNAL void duk_get_prototype(duk_hthread *thr, duk_idx_t idx) { duk_hobject *obj; duk_hobject *proto; DUK_ASSERT_API_ENTRY(thr); obj = duk_require_hobject(thr, idx); DUK_ASSERT(obj != NULL); /* XXX: shared helper for duk_push_hobject_or_undefined()? */ proto = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, obj); if (proto) { duk_push_hobject(thr, proto); } else { duk_push_undefined(thr); } } DUK_EXTERNAL void duk_set_prototype(duk_hthread *thr, duk_idx_t idx) { duk_hobject *obj; duk_hobject *proto; DUK_ASSERT_API_ENTRY(thr); obj = duk_require_hobject(thr, idx); DUK_ASSERT(obj != NULL); duk_require_type_mask(thr, -1, DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_OBJECT); proto = duk_get_hobject(thr, -1); /* proto can also be NULL here (allowed explicitly) */ #if defined(DUK_USE_ROM_OBJECTS) if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE); /* XXX: "read only object"? */ DUK_WO_NORETURN(return;); } #endif DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, obj, proto); duk_pop(thr); } DUK_INTERNAL void duk_clear_prototype(duk_hthread *thr, duk_idx_t idx) { duk_hobject *obj; DUK_ASSERT_API_ENTRY(thr); obj = duk_require_hobject(thr, idx); DUK_ASSERT(obj != NULL); #if defined(DUK_USE_ROM_OBJECTS) if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE); /* XXX: "read only object"? */ DUK_WO_NORETURN(return;); } #endif DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, obj, NULL); } DUK_INTERNAL duk_bool_t duk_is_bare_object(duk_hthread *thr, duk_idx_t idx) { duk_hobject *obj; duk_hobject *proto; DUK_ASSERT_API_ENTRY(thr); obj = duk_require_hobject(thr, idx); DUK_ASSERT(obj != NULL); proto = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, obj); return (proto == NULL); } /* * Object finalizer */ #if defined(DUK_USE_FINALIZER_SUPPORT) /* XXX: these could be implemented as macros calling an internal function * directly. * XXX: same issue as with Duktape.fin: there's no way to delete the property * now (just set it to undefined). */ DUK_EXTERNAL void duk_get_finalizer(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); /* This get intentionally walks the inheritance chain at present, * which matches how the effective finalizer property is also * looked up in GC. */ duk_get_prop_stridx(thr, idx, DUK_STRIDX_INT_FINALIZER); } DUK_EXTERNAL void duk_set_finalizer(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; duk_bool_t callable; DUK_ASSERT_API_ENTRY(thr); h = duk_require_hobject(thr, idx); /* Get before 'put' so that 'idx' is correct. */ callable = duk_is_callable(thr, -1); /* At present finalizer is stored as a hidden Symbol, with normal * inheritance and access control. As a result, finalizer cannot * currently be set on a non-extensible (sealed or frozen) object. * It might be useful to allow it. */ duk_put_prop_stridx(thr, idx, DUK_STRIDX_INT_FINALIZER); /* In addition to setting the finalizer property, keep a "have * finalizer" flag in duk_hobject in sync so that refzero can do * a very quick finalizer check by walking the prototype chain * and checking the flag alone. (Note that this means that just * setting _Finalizer on an object won't affect finalizer checks.) * * NOTE: if the argument is a Proxy object, this flag will be set * on the Proxy, not the target. As a result, the target won't get * a finalizer flag and the Proxy also won't be finalized as there's * an explicit Proxy check in finalization now. */ if (callable) { DUK_HOBJECT_SET_HAVE_FINALIZER(h); } else { DUK_HOBJECT_CLEAR_HAVE_FINALIZER(h); } } #else /* DUK_USE_FINALIZER_SUPPORT */ DUK_EXTERNAL void duk_get_finalizer(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(idx); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_set_finalizer(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(idx); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } #endif /* DUK_USE_FINALIZER_SUPPORT */ /* * Random numbers */ /* #include duk_internal.h -> already included */ DUK_EXTERNAL duk_double_t duk_random(duk_hthread *thr) { return (duk_double_t) DUK_UTIL_GET_RANDOM_DOUBLE(thr); } /* * API calls related to general value stack manipulation: resizing the value * stack, pushing and popping values, type checking and reading values, * coercing values, etc. * * Also contains internal functions (such as duk_get_tval()), defined * in duk_api_internal.h, with semantics similar to the public API. */ /* XXX: repetition of stack pre-checks -> helper or macro or inline */ /* XXX: shared api error strings, and perhaps even throw code for rare cases? */ /* #include duk_internal.h -> already included */ /* * Forward declarations */ DUK_LOCAL_DECL duk_idx_t duk__push_c_function_raw(duk_hthread *thr, duk_c_function func, duk_idx_t nargs, duk_uint_t flags, duk_small_uint_t proto_bidx); /* * Global state for working around missing variadic macros */ #if !defined(DUK_USE_VARIADIC_MACROS) DUK_EXTERNAL const char *duk_api_global_filename = NULL; DUK_EXTERNAL duk_int_t duk_api_global_line = 0; #endif /* * Misc helpers */ DUK_LOCAL const char * const duk__symbol_type_strings[4] = { "hidden", "global", "local", "wellknown" }; #if !defined(DUK_USE_PACKED_TVAL) DUK_LOCAL const duk_uint_t duk__type_from_tag[] = { DUK_TYPE_NUMBER, DUK_TYPE_NUMBER, /* fastint */ DUK_TYPE_UNDEFINED, DUK_TYPE_NULL, DUK_TYPE_BOOLEAN, DUK_TYPE_POINTER, DUK_TYPE_LIGHTFUNC, DUK_TYPE_NONE, DUK_TYPE_STRING, DUK_TYPE_OBJECT, DUK_TYPE_BUFFER, }; DUK_LOCAL const duk_uint_t duk__type_mask_from_tag[] = { DUK_TYPE_MASK_NUMBER, DUK_TYPE_MASK_NUMBER, /* fastint */ DUK_TYPE_MASK_UNDEFINED, DUK_TYPE_MASK_NULL, DUK_TYPE_MASK_BOOLEAN, DUK_TYPE_MASK_POINTER, DUK_TYPE_MASK_LIGHTFUNC, DUK_TYPE_MASK_NONE, DUK_TYPE_MASK_STRING, DUK_TYPE_MASK_OBJECT, DUK_TYPE_MASK_BUFFER, }; #endif /* !DUK_USE_PACKED_TVAL */ /* Assert that there's room for one value. */ #define DUK__ASSERT_SPACE() do { \ DUK_ASSERT(!(thr->valstack_top >= thr->valstack_end)); \ } while (0) /* Check that there's room to push one value. */ #if defined(DUK_USE_VALSTACK_UNSAFE) /* Faster but value stack overruns are memory unsafe. */ #define DUK__CHECK_SPACE() DUK__ASSERT_SPACE() #else #define DUK__CHECK_SPACE() do { \ if (DUK_UNLIKELY(thr->valstack_top >= thr->valstack_end)) { \ DUK_ERROR_RANGE_PUSH_BEYOND(thr); \ } \ } while (0) #endif DUK_LOCAL duk_small_uint_t duk__get_symbol_type(duk_hstring *h) { const duk_uint8_t *data; duk_size_t len; DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HSTRING_HAS_SYMBOL(h)); DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(h) >= 1); /* always true, symbol prefix */ data = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h); len = DUK_HSTRING_GET_BYTELEN(h); DUK_ASSERT(len >= 1); /* XXX: differentiate between 0x82 and 0xff (hidden vs. internal?)? */ if (data[0] == 0xffU) { return DUK_SYMBOL_TYPE_HIDDEN; } else if (data[0] == 0x82U) { return DUK_SYMBOL_TYPE_HIDDEN; } else if (data[0] == 0x80U) { return DUK_SYMBOL_TYPE_GLOBAL; } else if (data[len - 1] != 0xffU) { return DUK_SYMBOL_TYPE_LOCAL; } else { return DUK_SYMBOL_TYPE_WELLKNOWN; } } DUK_LOCAL const char *duk__get_symbol_type_string(duk_hstring *h) { duk_small_uint_t idx; idx = duk__get_symbol_type(h); DUK_ASSERT(idx < sizeof(duk__symbol_type_strings)); return duk__symbol_type_strings[idx]; } DUK_LOCAL_DECL duk_heaphdr *duk__get_tagged_heaphdr_raw(duk_hthread *thr, duk_idx_t idx, duk_uint_t tag); DUK_LOCAL duk_int_t duk__api_coerce_d2i(duk_hthread *thr, duk_idx_t idx, duk_int_t def_value, duk_bool_t require) { duk_tval *tv; duk_small_int_t c; duk_double_t d; tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); /* * Special cases like NaN and +/- Infinity are handled explicitly * because a plain C coercion from double to int handles these cases * in undesirable ways. For instance, NaN may coerce to INT_MIN * (not zero), and INT_MAX + 1 may coerce to INT_MIN (not INT_MAX). * * This double-to-int coercion differs from ToInteger() because it * has a finite range (ToInteger() allows e.g. +/- Infinity). It * also differs from ToInt32() because the INT_MIN/INT_MAX clamping * depends on the size of the int type on the platform. In particular, * on platforms with a 64-bit int type, the full range is allowed. */ #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv)) { duk_int64_t t = DUK_TVAL_GET_FASTINT(tv); #if (DUK_INT_MAX <= 0x7fffffffL) /* Clamping only necessary for 32-bit ints. */ if (t < DUK_INT_MIN) { t = DUK_INT_MIN; } else if (t > DUK_INT_MAX) { t = DUK_INT_MAX; } #endif return (duk_int_t) t; } #endif if (DUK_TVAL_IS_NUMBER(tv)) { d = DUK_TVAL_GET_NUMBER(tv); c = (duk_small_int_t) DUK_FPCLASSIFY(d); if (c == DUK_FP_NAN) { return 0; } else if (d < (duk_double_t) DUK_INT_MIN) { /* covers -Infinity */ return DUK_INT_MIN; } else if (d > (duk_double_t) DUK_INT_MAX) { /* covers +Infinity */ return DUK_INT_MAX; } else { /* coerce towards zero */ return (duk_int_t) d; } } if (require) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "number", DUK_STR_NOT_NUMBER); DUK_WO_NORETURN(return 0;); } return def_value; } DUK_LOCAL duk_uint_t duk__api_coerce_d2ui(duk_hthread *thr, duk_idx_t idx, duk_uint_t def_value, duk_bool_t require) { duk_tval *tv; duk_small_int_t c; duk_double_t d; /* Same as above but for unsigned int range. */ tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv)) { duk_int64_t t = DUK_TVAL_GET_FASTINT(tv); if (t < 0) { t = 0; } #if (DUK_UINT_MAX <= 0xffffffffUL) /* Clamping only necessary for 32-bit ints. */ else if (t > DUK_UINT_MAX) { t = DUK_UINT_MAX; } #endif return (duk_uint_t) t; } #endif if (DUK_TVAL_IS_NUMBER(tv)) { d = DUK_TVAL_GET_NUMBER(tv); c = (duk_small_int_t) DUK_FPCLASSIFY(d); if (c == DUK_FP_NAN) { return 0; } else if (d < 0.0) { /* covers -Infinity */ return (duk_uint_t) 0; } else if (d > (duk_double_t) DUK_UINT_MAX) { /* covers +Infinity */ return (duk_uint_t) DUK_UINT_MAX; } else { /* coerce towards zero */ return (duk_uint_t) d; } } if (require) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "number", DUK_STR_NOT_NUMBER); DUK_WO_NORETURN(return 0;); } return def_value; } /* * Stack index validation/normalization and getting a stack duk_tval ptr. * * These are called by many API entrypoints so the implementations must be * fast and "inlined". * * There's some repetition because of this; keep the functions in sync. */ DUK_EXTERNAL duk_idx_t duk_normalize_index(duk_hthread *thr, duk_idx_t idx) { duk_uidx_t vs_size; duk_uidx_t uidx; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(DUK_INVALID_INDEX < 0); /* Care must be taken to avoid pointer wrapping in the index * validation. For instance, on a 32-bit platform with 8-byte * duk_tval the index 0x20000000UL would wrap the memory space * once. */ /* Assume value stack sizes (in elements) fits into duk_idx_t. */ DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom); DUK_ASSERT_DISABLE(vs_size >= 0); /* unsigned */ if (idx < 0) { uidx = vs_size + (duk_uidx_t) idx; } else { /* since index non-negative */ DUK_ASSERT(idx != DUK_INVALID_INDEX); uidx = (duk_uidx_t) idx; } /* DUK_INVALID_INDEX won't be accepted as a valid index. */ DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size); if (DUK_LIKELY(uidx < vs_size)) { return (duk_idx_t) uidx; } return DUK_INVALID_INDEX; } DUK_EXTERNAL duk_idx_t duk_require_normalize_index(duk_hthread *thr, duk_idx_t idx) { duk_uidx_t vs_size; duk_uidx_t uidx; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(DUK_INVALID_INDEX < 0); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom); DUK_ASSERT_DISABLE(vs_size >= 0); /* unsigned */ if (idx < 0) { uidx = vs_size + (duk_uidx_t) idx; } else { DUK_ASSERT(idx != DUK_INVALID_INDEX); uidx = (duk_uidx_t) idx; } /* DUK_INVALID_INDEX won't be accepted as a valid index. */ DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size); if (DUK_LIKELY(uidx < vs_size)) { return (duk_idx_t) uidx; } DUK_ERROR_RANGE_INDEX(thr, idx); DUK_WO_NORETURN(return 0;); } DUK_INTERNAL duk_tval *duk_get_tval(duk_hthread *thr, duk_idx_t idx) { duk_uidx_t vs_size; duk_uidx_t uidx; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(DUK_INVALID_INDEX < 0); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom); DUK_ASSERT_DISABLE(vs_size >= 0); /* unsigned */ if (idx < 0) { uidx = vs_size + (duk_uidx_t) idx; } else { DUK_ASSERT(idx != DUK_INVALID_INDEX); uidx = (duk_uidx_t) idx; } /* DUK_INVALID_INDEX won't be accepted as a valid index. */ DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size); if (DUK_LIKELY(uidx < vs_size)) { return thr->valstack_bottom + uidx; } return NULL; } /* Variant of duk_get_tval() which is guaranteed to return a valid duk_tval * pointer. When duk_get_tval() would return NULL, this variant returns a * pointer to a duk_tval with tag DUK_TAG_UNUSED. This allows the call site * to avoid an unnecessary NULL check which sometimes leads to better code. * The return duk_tval is read only (at least for the UNUSED value). */ DUK_LOCAL const duk_tval_unused duk__const_tval_unused = DUK_TVAL_UNUSED_INITIALIZER(); DUK_INTERNAL duk_tval *duk_get_tval_or_unused(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval(thr, idx); if (tv != NULL) { return tv; } return (duk_tval *) DUK_LOSE_CONST(&duk__const_tval_unused); } DUK_INTERNAL duk_tval *duk_require_tval(duk_hthread *thr, duk_idx_t idx) { duk_uidx_t vs_size; duk_uidx_t uidx; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(DUK_INVALID_INDEX < 0); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom); DUK_ASSERT_DISABLE(vs_size >= 0); /* unsigned */ /* Use unsigned arithmetic to optimize comparison. */ if (idx < 0) { uidx = vs_size + (duk_uidx_t) idx; } else { DUK_ASSERT(idx != DUK_INVALID_INDEX); uidx = (duk_uidx_t) idx; } /* DUK_INVALID_INDEX won't be accepted as a valid index. */ DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size); if (DUK_LIKELY(uidx < vs_size)) { return thr->valstack_bottom + uidx; } DUK_ERROR_RANGE_INDEX(thr, idx); DUK_WO_NORETURN(return NULL;); } /* Non-critical. */ DUK_EXTERNAL duk_bool_t duk_is_valid_index(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(DUK_INVALID_INDEX < 0); return (duk_normalize_index(thr, idx) >= 0); } /* Non-critical. */ DUK_EXTERNAL void duk_require_valid_index(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(DUK_INVALID_INDEX < 0); if (DUK_UNLIKELY(duk_normalize_index(thr, idx) < 0)) { DUK_ERROR_RANGE_INDEX(thr, idx); DUK_WO_NORETURN(return;); } } /* * Value stack top handling */ DUK_EXTERNAL duk_idx_t duk_get_top(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); return (duk_idx_t) (thr->valstack_top - thr->valstack_bottom); } /* Internal helper to get current top but to require a minimum top value * (TypeError if not met). */ DUK_INTERNAL duk_idx_t duk_get_top_require_min(duk_hthread *thr, duk_idx_t min_top) { duk_idx_t ret; DUK_ASSERT_API_ENTRY(thr); ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom); if (DUK_UNLIKELY(ret < min_top)) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return 0;); } return ret; } /* Set stack top within currently allocated range, but don't reallocate. * This is performance critical especially for call handling, so whenever * changing, profile and look at generated code. */ DUK_EXTERNAL void duk_set_top(duk_hthread *thr, duk_idx_t idx) { duk_uidx_t vs_size; duk_uidx_t vs_limit; duk_uidx_t uidx; duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(DUK_INVALID_INDEX < 0); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT(thr->valstack_end >= thr->valstack_bottom); vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom); vs_limit = (duk_uidx_t) (thr->valstack_end - thr->valstack_bottom); if (idx < 0) { /* Negative indices are always within allocated stack but * must not go below zero index. */ uidx = vs_size + (duk_uidx_t) idx; } else { /* Positive index can be higher than valstack top but must * not go above allocated stack (equality is OK). */ uidx = (duk_uidx_t) idx; } /* DUK_INVALID_INDEX won't be accepted as a valid index. */ DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size); DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_limit); #if defined(DUK_USE_VALSTACK_UNSAFE) DUK_ASSERT(uidx <= vs_limit); DUK_UNREF(vs_limit); #else if (DUK_UNLIKELY(uidx > vs_limit)) { DUK_ERROR_RANGE_INDEX(thr, idx); DUK_WO_NORETURN(return;); } #endif DUK_ASSERT(uidx <= vs_limit); /* Handle change in value stack top. Respect value stack * initialization policy: 'undefined' above top. Note that * DECREF may cause a side effect that reallocates valstack, * so must relookup after DECREF. */ if (uidx >= vs_size) { /* Stack size increases or stays the same. */ #if defined(DUK_USE_ASSERTIONS) duk_uidx_t count; count = uidx - vs_size; while (count != 0) { count--; tv = thr->valstack_top + count; DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv)); } #endif thr->valstack_top = thr->valstack_bottom + uidx; } else { /* Stack size decreases. */ #if defined(DUK_USE_REFERENCE_COUNTING) duk_uidx_t count; duk_tval *tv_end; count = vs_size - uidx; DUK_ASSERT(count > 0); tv = thr->valstack_top; tv_end = tv - count; DUK_ASSERT(tv > tv_end); /* Because count > 0. */ do { tv--; DUK_ASSERT(tv >= thr->valstack_bottom); DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ(thr, tv); } while (tv != tv_end); thr->valstack_top = tv_end; DUK_REFZERO_CHECK_FAST(thr); #else /* DUK_USE_REFERENCE_COUNTING */ duk_uidx_t count; duk_tval *tv_end; count = vs_size - uidx; tv = thr->valstack_top; tv_end = tv - count; DUK_ASSERT(tv > tv_end); do { tv--; DUK_TVAL_SET_UNDEFINED(tv); } while (tv != tv_end); thr->valstack_top = tv_end; #endif /* DUK_USE_REFERENCE_COUNTING */ } } /* Internal variant with a non-negative index and no runtime size checks. */ #if defined(DUK_USE_PREFER_SIZE) DUK_INTERNAL void duk_set_top_unsafe(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); duk_set_top(thr, idx); } #else /* DUK_USE_PREFER_SIZE */ DUK_INTERNAL void duk_set_top_unsafe(duk_hthread *thr, duk_idx_t idx) { duk_uidx_t uidx; duk_uidx_t vs_size; duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT(thr->valstack_end >= thr->valstack_bottom); DUK_ASSERT(idx >= 0); DUK_ASSERT(idx <= (duk_idx_t) (thr->valstack_end - thr->valstack_bottom)); /* XXX: byte arithmetic */ uidx = (duk_uidx_t) idx; vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom); if (uidx >= vs_size) { /* Stack size increases or stays the same. */ #if defined(DUK_USE_ASSERTIONS) duk_uidx_t count; count = uidx - vs_size; while (count != 0) { count--; tv = thr->valstack_top + count; DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv)); } #endif thr->valstack_top = thr->valstack_bottom + uidx; } else { /* Stack size decreases. */ #if defined(DUK_USE_REFERENCE_COUNTING) duk_uidx_t count; duk_tval *tv_end; count = vs_size - uidx; DUK_ASSERT(count > 0); tv = thr->valstack_top; tv_end = tv - count; DUK_ASSERT(tv > tv_end); /* Because count > 0. */ do { tv--; DUK_ASSERT(tv >= thr->valstack_bottom); DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ(thr, tv); } while (tv != tv_end); thr->valstack_top = tv_end; DUK_REFZERO_CHECK_FAST(thr); #else /* DUK_USE_REFERENCE_COUNTING */ duk_uidx_t count; duk_tval *tv_end; count = vs_size - uidx; tv = thr->valstack_top; tv_end = tv - count; DUK_ASSERT(tv > tv_end); do { tv--; DUK_TVAL_SET_UNDEFINED(tv); } while (tv != tv_end); thr->valstack_top = tv_end; #endif /* DUK_USE_REFERENCE_COUNTING */ } } #endif /* DUK_USE_PREFER_SIZE */ /* Internal helper: set top to 'top', and set [idx_wipe_start,top[ to * 'undefined' (doing nothing if idx_wipe_start == top). Indices are * positive and within value stack reserve. This is used by call handling. */ DUK_INTERNAL void duk_set_top_and_wipe(duk_hthread *thr, duk_idx_t top, duk_idx_t idx_wipe_start) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(top >= 0); DUK_ASSERT(idx_wipe_start >= 0); DUK_ASSERT(idx_wipe_start <= top); DUK_ASSERT(thr->valstack_bottom + top <= thr->valstack_end); DUK_ASSERT(thr->valstack_bottom + idx_wipe_start <= thr->valstack_end); duk_set_top_unsafe(thr, idx_wipe_start); duk_set_top_unsafe(thr, top); } DUK_EXTERNAL duk_idx_t duk_get_top_index(duk_hthread *thr) { duk_idx_t ret; DUK_ASSERT_API_ENTRY(thr); ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom) - 1; if (DUK_UNLIKELY(ret < 0)) { /* Return invalid index; if caller uses this without checking * in another API call, the index won't map to a valid stack * entry. */ return DUK_INVALID_INDEX; } return ret; } /* Internal variant: call assumes there is at least one element on the value * stack frame; this is only asserted for. */ DUK_INTERNAL duk_idx_t duk_get_top_index_unsafe(duk_hthread *thr) { duk_idx_t ret; DUK_ASSERT_API_ENTRY(thr); ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom) - 1; return ret; } DUK_EXTERNAL duk_idx_t duk_require_top_index(duk_hthread *thr) { duk_idx_t ret; DUK_ASSERT_API_ENTRY(thr); ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom) - 1; if (DUK_UNLIKELY(ret < 0)) { DUK_ERROR_RANGE_INDEX(thr, -1); DUK_WO_NORETURN(return 0;); } return ret; } /* * Value stack resizing. * * This resizing happens above the current "top": the value stack can be * grown or shrunk, but the "top" is not affected. The value stack cannot * be resized to a size below the current reserve. * * The low level reallocation primitive must carefully recompute all value * stack pointers, and must also work if ALL pointers are NULL. The resize * is quite tricky because the valstack realloc may cause a mark-and-sweep, * which may run finalizers. Running finalizers may resize the valstack * recursively (the same value stack we're working on). So, after realloc * returns, we know that the valstack bottom, top, and reserve should still * be the same (there should not be live values above the "top"), but its * underlying size, alloc_end, and base pointer may have changed. * * 'new_size' is known to be <= DUK_USE_VALSTACK_LIMIT, which ensures that * size_t and pointer arithmetic won't wrap in duk__resize_valstack(). */ /* Low level valstack resize primitive, used for both grow and shrink. All * adjustments for slack etc have already been done. Doesn't throw but does * have allocation side effects. */ DUK_LOCAL DUK_COLD DUK_NOINLINE duk_bool_t duk__resize_valstack(duk_hthread *thr, duk_size_t new_size) { duk_tval *pre_valstack; duk_tval *pre_bottom; duk_tval *pre_top; duk_tval *pre_end; duk_tval *pre_alloc_end; duk_ptrdiff_t ptr_diff; duk_tval *new_valstack; duk_size_t new_alloc_size; duk_tval *tv_prev_alloc_end; duk_tval *p; DUK_HTHREAD_ASSERT_VALID(thr); DUK_ASSERT(thr->valstack_bottom >= thr->valstack); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT(thr->valstack_end >= thr->valstack_top); DUK_ASSERT(thr->valstack_alloc_end >= thr->valstack_end); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack) <= new_size); /* can't resize below 'top' */ DUK_ASSERT(new_size <= DUK_USE_VALSTACK_LIMIT); /* valstack limit caller has check, prevents wrapping */ DUK_ASSERT(new_size <= DUK_SIZE_MAX / sizeof(duk_tval)); /* specific assert for wrapping */ /* Pre-realloc pointer copies for asserts and debug logs. */ pre_valstack = thr->valstack; pre_bottom = thr->valstack_bottom; pre_top = thr->valstack_top; pre_end = thr->valstack_end; pre_alloc_end = thr->valstack_alloc_end; DUK_UNREF(pre_valstack); DUK_UNREF(pre_bottom); DUK_UNREF(pre_top); DUK_UNREF(pre_end); DUK_UNREF(pre_alloc_end); /* If finalizer torture enabled, force base pointer change every time * when it would be allowed. */ #if defined(DUK_USE_FINALIZER_TORTURE) if (thr->heap->pf_prevent_count == 0) { duk_hthread_valstack_torture_realloc(thr); } #endif /* Allocate a new valstack using DUK_REALLOC_DIRECT() to deal with * a side effect changing the base pointer. */ new_alloc_size = sizeof(duk_tval) * new_size; new_valstack = (duk_tval *) DUK_REALLOC_INDIRECT(thr->heap, duk_hthread_get_valstack_ptr, (void *) thr, new_alloc_size); if (DUK_UNLIKELY(new_valstack == NULL)) { /* Because new_size != 0, if condition doesn't need to be * (new_valstack != NULL || new_size == 0). */ DUK_ASSERT(new_size != 0); DUK_D(DUK_DPRINT("failed to resize valstack to %lu entries (%lu bytes)", (unsigned long) new_size, (unsigned long) new_alloc_size)); return 0; } /* Debug log any changes in pointer(s) by side effects. These don't * necessarily imply any incorrect behavior, but should be rare in * practice. */ #if defined(DUK_USE_DEBUG) if (thr->valstack != pre_valstack) { DUK_D(DUK_DPRINT("valstack base pointer changed during valstack resize: %p -> %p", (void *) pre_valstack, (void *) thr->valstack)); } if (thr->valstack_bottom != pre_bottom) { DUK_D(DUK_DPRINT("valstack bottom pointer changed during valstack resize: %p -> %p", (void *) pre_bottom, (void *) thr->valstack_bottom)); } if (thr->valstack_top != pre_top) { DUK_D(DUK_DPRINT("valstack top pointer changed during valstack resize: %p -> %p", (void *) pre_top, (void *) thr->valstack_top)); } if (thr->valstack_end != pre_end) { DUK_D(DUK_DPRINT("valstack end pointer changed during valstack resize: %p -> %p", (void *) pre_end, (void *) thr->valstack_end)); } if (thr->valstack_alloc_end != pre_alloc_end) { DUK_D(DUK_DPRINT("valstack alloc_end pointer changed during valstack resize: %p -> %p", (void *) pre_alloc_end, (void *) thr->valstack_alloc_end)); } #endif /* Assertions: offsets for bottom, top, and end (reserve) must not * have changed even with side effects because they are always * restored in unwind. For alloc_end there's no guarantee: it may * have grown or shrunk (but remain above 'end'). */ DUK_ASSERT(thr->valstack_bottom - thr->valstack == pre_bottom - pre_valstack); DUK_ASSERT(thr->valstack_top - thr->valstack == pre_top - pre_valstack); DUK_ASSERT(thr->valstack_end - thr->valstack == pre_end - pre_valstack); DUK_ASSERT(thr->valstack_alloc_end >= thr->valstack_end); /* Write new pointers. Most pointers can be handled as a pointer * difference. */ ptr_diff = (duk_ptrdiff_t) ((duk_uint8_t *) new_valstack - (duk_uint8_t *) thr->valstack); tv_prev_alloc_end = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack_alloc_end + ptr_diff); thr->valstack = new_valstack; thr->valstack_bottom = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack_bottom + ptr_diff); thr->valstack_top = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack_top + ptr_diff); thr->valstack_end = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack_end + ptr_diff); thr->valstack_alloc_end = (duk_tval *) (void *) ((duk_uint8_t *) new_valstack + new_alloc_size); /* Assertions: pointer sanity after pointer updates. */ DUK_ASSERT(thr->valstack_bottom >= thr->valstack); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT(thr->valstack_end >= thr->valstack_top); DUK_ASSERT(thr->valstack_alloc_end >= thr->valstack_end); DUK_D(DUK_DPRINT("resized valstack %lu -> %lu elements (%lu -> %lu bytes): " "base=%p -> %p, bottom=%p -> %p (%ld), top=%p -> %p (%ld), " "end=%p -> %p (%ld), alloc_end=%p -> %p (%ld);" " tv_prev_alloc_end=%p (-> %ld inits; <0 means shrink)", (unsigned long) (pre_alloc_end - pre_valstack), (unsigned long) new_size, (unsigned long) ((duk_uint8_t *) pre_alloc_end - (duk_uint8_t *) pre_valstack), (unsigned long) new_alloc_size, (void *) pre_valstack, (void *) thr->valstack, (void *) pre_bottom, (void *) thr->valstack_bottom, (long) (thr->valstack_bottom - thr->valstack), (void *) pre_top, (void *) thr->valstack_top, (long) (thr->valstack_top - thr->valstack), (void *) pre_end, (void *) thr->valstack_end, (long) (thr->valstack_end - thr->valstack), (void *) pre_alloc_end, (void *) thr->valstack_alloc_end, (long) (thr->valstack_alloc_end - thr->valstack), (void *) tv_prev_alloc_end, (long) (thr->valstack_alloc_end - tv_prev_alloc_end))); /* If allocation grew, init any new slots to 'undefined'. */ p = tv_prev_alloc_end; while (p < thr->valstack_alloc_end) { /* Never executed if new size is smaller. */ DUK_TVAL_SET_UNDEFINED(p); p++; } /* Assert for value stack initialization policy. */ #if defined(DUK_USE_ASSERTIONS) p = thr->valstack_top; while (p < thr->valstack_alloc_end) { DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(p)); p++; } #endif return 1; } DUK_LOCAL DUK_COLD DUK_NOINLINE duk_bool_t duk__valstack_grow(duk_hthread *thr, duk_size_t min_bytes, duk_bool_t throw_on_error) { duk_size_t min_size; duk_size_t new_size; DUK_ASSERT(min_bytes / sizeof(duk_tval) * sizeof(duk_tval) == min_bytes); min_size = min_bytes / sizeof(duk_tval); /* from bytes to slots */ #if defined(DUK_USE_VALSTACK_GROW_SHIFT) /* New size is minimum size plus a proportional slack, e.g. shift of * 2 means a 25% slack. */ new_size = min_size + (min_size >> DUK_USE_VALSTACK_GROW_SHIFT); #else /* New size is tight with no slack. This is sometimes preferred in * low memory environments. */ new_size = min_size; #endif if (DUK_UNLIKELY(new_size > DUK_USE_VALSTACK_LIMIT || new_size < min_size /*wrap*/)) { /* Note: may be triggered even if minimal new_size would not reach the limit, * plan limit accordingly. */ if (throw_on_error) { DUK_ERROR_RANGE(thr, DUK_STR_VALSTACK_LIMIT); DUK_WO_NORETURN(return 0;); } return 0; } if (duk__resize_valstack(thr, new_size) == 0) { if (throw_on_error) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return 0;); } return 0; } thr->valstack_end = thr->valstack + min_size; DUK_ASSERT(thr->valstack_alloc_end >= thr->valstack_end); return 1; } /* Hot, inlined value stack grow check. Because value stack almost never * grows, the actual resize call is in a NOINLINE helper. */ DUK_INTERNAL DUK_INLINE void duk_valstack_grow_check_throw(duk_hthread *thr, duk_size_t min_bytes) { duk_tval *tv; tv = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + min_bytes); if (DUK_LIKELY(thr->valstack_end >= tv)) { return; } if (DUK_LIKELY(thr->valstack_alloc_end >= tv)) { /* Values in [valstack_top,valstack_alloc_end[ are initialized * to 'undefined' so we can just move the end pointer. */ thr->valstack_end = tv; return; } (void) duk__valstack_grow(thr, min_bytes, 1 /*throw_on_error*/); } /* Hot, inlined value stack grow check which doesn't throw. */ DUK_INTERNAL DUK_INLINE duk_bool_t duk_valstack_grow_check_nothrow(duk_hthread *thr, duk_size_t min_bytes) { duk_tval *tv; tv = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + min_bytes); if (DUK_LIKELY(thr->valstack_end >= tv)) { return 1; } if (DUK_LIKELY(thr->valstack_alloc_end >= tv)) { thr->valstack_end = tv; return 1; } return duk__valstack_grow(thr, min_bytes, 0 /*throw_on_error*/); } /* Value stack shrink check, called from mark-and-sweep. */ DUK_INTERNAL void duk_valstack_shrink_check_nothrow(duk_hthread *thr, duk_bool_t snug) { duk_size_t alloc_bytes; duk_size_t reserve_bytes; duk_size_t shrink_bytes; alloc_bytes = (duk_size_t) ((duk_uint8_t *) thr->valstack_alloc_end - (duk_uint8_t *) thr->valstack); reserve_bytes = (duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack); DUK_ASSERT(alloc_bytes >= reserve_bytes); /* We're free to shrink the value stack allocation down to * reserve_bytes but not more. If 'snug' (emergency GC) * shrink whatever we can. Otherwise only shrink if the new * size would be considerably smaller. */ #if defined(DUK_USE_VALSTACK_SHRINK_CHECK_SHIFT) if (snug) { shrink_bytes = reserve_bytes; } else { duk_size_t proportion, slack; /* Require that value stack shrinks by at least X% of its * current size. For example, shift of 2 means at least * 25%. The proportion is computed as bytes and may not * be a multiple of sizeof(duk_tval); that's OK here. */ proportion = alloc_bytes >> DUK_USE_VALSTACK_SHRINK_CHECK_SHIFT; if (alloc_bytes - reserve_bytes < proportion) { /* Too little would be freed, do nothing. */ return; } /* Keep a slack after shrinking. The slack is again a * proportion of the current size (the proportion should * of course be smaller than the check proportion above). */ #if defined(DUK_USE_VALSTACK_SHRINK_SLACK_SHIFT) DUK_ASSERT(DUK_USE_VALSTACK_SHRINK_SLACK_SHIFT > DUK_USE_VALSTACK_SHRINK_CHECK_SHIFT); slack = alloc_bytes >> DUK_USE_VALSTACK_SHRINK_SLACK_SHIFT; #else slack = 0; #endif shrink_bytes = reserve_bytes + slack / sizeof(duk_tval) * sizeof(duk_tval); /* multiple of duk_tval */ } #else /* DUK_USE_VALSTACK_SHRINK_CHECK_SHIFT */ /* Always snug, useful in some low memory environments. */ DUK_UNREF(snug); shrink_bytes = reserve_bytes; #endif /* DUK_USE_VALSTACK_SHRINK_CHECK_SHIFT */ DUK_D(DUK_DPRINT("valstack shrink check: alloc_bytes=%ld, reserve_bytes=%ld, shrink_bytes=%ld (unvalidated)", (long) alloc_bytes, (long) reserve_bytes, (long) shrink_bytes)); DUK_ASSERT(shrink_bytes >= reserve_bytes); if (shrink_bytes >= alloc_bytes) { /* Skip if shrink target is same as current one (or higher, * though that shouldn't happen in practice). */ return; } DUK_ASSERT(shrink_bytes / sizeof(duk_tval) * sizeof(duk_tval) == shrink_bytes); DUK_D(DUK_DPRINT("valstack shrink check: decided to shrink, snug: %ld", (long) snug)); duk__resize_valstack(thr, shrink_bytes / sizeof(duk_tval)); } DUK_EXTERNAL duk_bool_t duk_check_stack(duk_hthread *thr, duk_idx_t extra) { duk_size_t min_new_bytes; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr != NULL); if (DUK_UNLIKELY(extra < 0 || extra > DUK_USE_VALSTACK_LIMIT)) { if (extra < 0) { /* Clamping to zero makes the API more robust to calling code * calculation errors. */ extra = 0; } else { /* Cause grow check to fail without wrapping arithmetic. */ extra = DUK_USE_VALSTACK_LIMIT; } } min_new_bytes = (duk_size_t) ((duk_uint8_t *) thr->valstack_top - (duk_uint8_t *) thr->valstack) + sizeof(duk_tval) * ((duk_size_t) extra + DUK_VALSTACK_INTERNAL_EXTRA); return duk_valstack_grow_check_nothrow(thr, min_new_bytes); } DUK_EXTERNAL void duk_require_stack(duk_hthread *thr, duk_idx_t extra) { duk_size_t min_new_bytes; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr != NULL); if (DUK_UNLIKELY(extra < 0 || extra > DUK_USE_VALSTACK_LIMIT)) { if (extra < 0) { /* Clamping to zero makes the API more robust to calling code * calculation errors. */ extra = 0; } else { /* Cause grow check to fail without wrapping arithmetic. */ extra = DUK_USE_VALSTACK_LIMIT; } } min_new_bytes = (duk_size_t) ((duk_uint8_t *) thr->valstack_top - (duk_uint8_t *) thr->valstack) + sizeof(duk_tval) * ((duk_size_t) extra + DUK_VALSTACK_INTERNAL_EXTRA); duk_valstack_grow_check_throw(thr, min_new_bytes); } DUK_EXTERNAL duk_bool_t duk_check_stack_top(duk_hthread *thr, duk_idx_t top) { duk_size_t min_new_bytes; DUK_ASSERT_API_ENTRY(thr); if (DUK_UNLIKELY(top < 0 || top > DUK_USE_VALSTACK_LIMIT)) { if (top < 0) { /* Clamping to zero makes the API more robust to calling code * calculation errors. */ top = 0; } else { /* Cause grow check to fail without wrapping arithmetic. */ top = DUK_USE_VALSTACK_LIMIT; } } DUK_ASSERT(top >= 0); min_new_bytes = (duk_size_t) ((duk_uint8_t *) thr->valstack_bottom - (duk_uint8_t *) thr->valstack) + sizeof(duk_tval) * ((duk_size_t) top + DUK_VALSTACK_INTERNAL_EXTRA); return duk_valstack_grow_check_nothrow(thr, min_new_bytes); } DUK_EXTERNAL void duk_require_stack_top(duk_hthread *thr, duk_idx_t top) { duk_size_t min_new_bytes; DUK_ASSERT_API_ENTRY(thr); if (DUK_UNLIKELY(top < 0 || top > DUK_USE_VALSTACK_LIMIT)) { if (top < 0) { /* Clamping to zero makes the API more robust to calling code * calculation errors. */ top = 0; } else { /* Cause grow check to fail without wrapping arithmetic. */ top = DUK_USE_VALSTACK_LIMIT; } } DUK_ASSERT(top >= 0); min_new_bytes = (duk_size_t) ((duk_uint8_t *) thr->valstack_bottom - (duk_uint8_t *) thr->valstack) + sizeof(duk_tval) * ((duk_size_t) top + DUK_VALSTACK_INTERNAL_EXTRA); duk_valstack_grow_check_throw(thr, min_new_bytes); } /* * Basic stack manipulation: swap, dup, insert, replace, etc */ DUK_EXTERNAL void duk_swap(duk_hthread *thr, duk_idx_t idx1, duk_idx_t idx2) { duk_tval *tv1; duk_tval *tv2; duk_tval tv_tmp; DUK_ASSERT_API_ENTRY(thr); tv1 = duk_require_tval(thr, idx1); DUK_ASSERT(tv1 != NULL); tv2 = duk_require_tval(thr, idx2); DUK_ASSERT(tv2 != NULL); /* If tv1==tv2 this is a NOP, no check is needed */ DUK_TVAL_SET_TVAL(&tv_tmp, tv1); DUK_TVAL_SET_TVAL(tv1, tv2); DUK_TVAL_SET_TVAL(tv2, &tv_tmp); } DUK_EXTERNAL void duk_swap_top(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); duk_swap(thr, idx, -1); } DUK_EXTERNAL void duk_dup(duk_hthread *thr, duk_idx_t from_idx) { duk_tval *tv_from; duk_tval *tv_to; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); tv_from = duk_require_tval(thr, from_idx); tv_to = thr->valstack_top++; DUK_ASSERT(tv_from != NULL); DUK_ASSERT(tv_to != NULL); DUK_TVAL_SET_TVAL(tv_to, tv_from); DUK_TVAL_INCREF(thr, tv_to); /* no side effects */ } DUK_EXTERNAL void duk_dup_top(duk_hthread *thr) { #if defined(DUK_USE_PREFER_SIZE) duk_dup(thr, -1); #else duk_tval *tv_from; duk_tval *tv_to; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); if (DUK_UNLIKELY(thr->valstack_top - thr->valstack_bottom <= 0)) { DUK_ERROR_RANGE_INDEX(thr, -1); DUK_WO_NORETURN(return;); } tv_from = thr->valstack_top - 1; tv_to = thr->valstack_top++; DUK_ASSERT(tv_from != NULL); DUK_ASSERT(tv_to != NULL); DUK_TVAL_SET_TVAL(tv_to, tv_from); DUK_TVAL_INCREF(thr, tv_to); /* no side effects */ #endif } DUK_INTERNAL void duk_dup_0(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_dup(thr, 0); } DUK_INTERNAL void duk_dup_1(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_dup(thr, 1); } DUK_INTERNAL void duk_dup_2(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_dup(thr, 2); } DUK_INTERNAL void duk_dup_m2(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_dup(thr, -2); } DUK_INTERNAL void duk_dup_m3(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_dup(thr, -3); } DUK_INTERNAL void duk_dup_m4(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_dup(thr, -4); } DUK_EXTERNAL void duk_insert(duk_hthread *thr, duk_idx_t to_idx) { duk_tval *p; duk_tval *q; duk_tval tv_tmp; duk_size_t nbytes; DUK_ASSERT_API_ENTRY(thr); p = duk_require_tval(thr, to_idx); DUK_ASSERT(p != NULL); q = duk_require_tval(thr, -1); DUK_ASSERT(q != NULL); DUK_ASSERT(q >= p); /* nbytes * <---------> * [ ... | p | x | x | q ] * => [ ... | q | p | x | x ] */ nbytes = (duk_size_t) (((duk_uint8_t *) q) - ((duk_uint8_t *) p)); /* Note: 'q' is top-1 */ DUK_DDD(DUK_DDDPRINT("duk_insert: to_idx=%ld, p=%p, q=%p, nbytes=%lu", (long) to_idx, (void *) p, (void *) q, (unsigned long) nbytes)); /* No net refcount changes. No need to special case nbytes == 0 * (p == q). */ DUK_TVAL_SET_TVAL(&tv_tmp, q); duk_memmove((void *) (p + 1), (const void *) p, (size_t) nbytes); DUK_TVAL_SET_TVAL(p, &tv_tmp); } DUK_INTERNAL void duk_insert_undefined(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(idx >= 0); /* Doesn't support negative indices. */ duk_push_undefined(thr); duk_insert(thr, idx); } DUK_INTERNAL void duk_insert_undefined_n(duk_hthread *thr, duk_idx_t idx, duk_idx_t count) { duk_tval *tv, *tv_end; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(idx >= 0); /* Doesn't support negative indices or count. */ DUK_ASSERT(count >= 0); tv = duk_reserve_gap(thr, idx, count); tv_end = tv + count; while (tv != tv_end) { DUK_TVAL_SET_UNDEFINED(tv); tv++; } } DUK_EXTERNAL void duk_replace(duk_hthread *thr, duk_idx_t to_idx) { duk_tval *tv1; duk_tval *tv2; duk_tval tv_tmp; DUK_ASSERT_API_ENTRY(thr); tv1 = duk_require_tval(thr, -1); DUK_ASSERT(tv1 != NULL); tv2 = duk_require_tval(thr, to_idx); DUK_ASSERT(tv2 != NULL); /* For tv1 == tv2, both pointing to stack top, the end result * is same as duk_pop(thr). */ DUK_TVAL_SET_TVAL(&tv_tmp, tv2); DUK_TVAL_SET_TVAL(tv2, tv1); DUK_TVAL_SET_UNDEFINED(tv1); thr->valstack_top--; DUK_TVAL_DECREF(thr, &tv_tmp); /* side effects */ } DUK_EXTERNAL void duk_copy(duk_hthread *thr, duk_idx_t from_idx, duk_idx_t to_idx) { duk_tval *tv1; duk_tval *tv2; DUK_ASSERT_API_ENTRY(thr); tv1 = duk_require_tval(thr, from_idx); DUK_ASSERT(tv1 != NULL); tv2 = duk_require_tval(thr, to_idx); DUK_ASSERT(tv2 != NULL); /* For tv1 == tv2, this is a no-op (no explicit check needed). */ DUK_TVAL_SET_TVAL_UPDREF(thr, tv2, tv1); /* side effects */ } DUK_EXTERNAL void duk_remove(duk_hthread *thr, duk_idx_t idx) { duk_tval *p; duk_tval *q; #if defined(DUK_USE_REFERENCE_COUNTING) duk_tval tv_tmp; #endif duk_size_t nbytes; DUK_ASSERT_API_ENTRY(thr); p = duk_require_tval(thr, idx); DUK_ASSERT(p != NULL); q = duk_require_tval(thr, -1); DUK_ASSERT(q != NULL); DUK_ASSERT(q >= p); /* nbytes zero size case * <---------> * [ ... | p | x | x | q ] [ ... | p==q ] * => [ ... | x | x | q ] [ ... ] */ #if defined(DUK_USE_REFERENCE_COUNTING) /* use a temp: decref only when valstack reachable values are correct */ DUK_TVAL_SET_TVAL(&tv_tmp, p); #endif nbytes = (duk_size_t) (((duk_uint8_t *) q) - ((duk_uint8_t *) p)); /* Note: 'q' is top-1 */ duk_memmove((void *) p, (const void *) (p + 1), (size_t) nbytes); DUK_TVAL_SET_UNDEFINED(q); thr->valstack_top--; #if defined(DUK_USE_REFERENCE_COUNTING) DUK_TVAL_DECREF(thr, &tv_tmp); /* side effects */ #endif } DUK_INTERNAL void duk_remove_unsafe(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); duk_remove(thr, idx); /* XXX: no optimization for now */ } DUK_INTERNAL void duk_remove_m2(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_remove(thr, -2); } DUK_INTERNAL void duk_remove_n(duk_hthread *thr, duk_idx_t idx, duk_idx_t count) { #if defined(DUK_USE_PREFER_SIZE) /* XXX: maybe too slow even when preferring size? */ DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(count >= 0); DUK_ASSERT(idx >= 0); while (count-- > 0) { duk_remove(thr, idx); } #else /* DUK_USE_PREFER_SIZE */ duk_tval *tv_src; duk_tval *tv_dst; duk_tval *tv_newtop; duk_tval *tv; duk_size_t bytes; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(count >= 0); DUK_ASSERT(idx >= 0); tv_dst = thr->valstack_bottom + idx; DUK_ASSERT(tv_dst <= thr->valstack_top); tv_src = tv_dst + count; DUK_ASSERT(tv_src <= thr->valstack_top); bytes = (duk_size_t) ((duk_uint8_t *) thr->valstack_top - (duk_uint8_t *) tv_src); for (tv = tv_dst; tv < tv_src; tv++) { DUK_TVAL_DECREF_NORZ(thr, tv); } duk_memmove((void *) tv_dst, (const void *) tv_src, bytes); tv_newtop = thr->valstack_top - count; for (tv = tv_newtop; tv < thr->valstack_top; tv++) { DUK_TVAL_SET_UNDEFINED(tv); } thr->valstack_top = tv_newtop; /* When not preferring size, only NORZ macros are used; caller * is expected to DUK_REFZERO_CHECK(). */ #endif /* DUK_USE_PREFER_SIZE */ } DUK_INTERNAL void duk_remove_n_unsafe(duk_hthread *thr, duk_idx_t idx, duk_idx_t count) { DUK_ASSERT_API_ENTRY(thr); duk_remove_n(thr, idx, count); /* XXX: no optimization for now */ } /* * Stack slice primitives */ DUK_EXTERNAL void duk_xcopymove_raw(duk_hthread *to_thr, duk_hthread *from_thr, duk_idx_t count, duk_bool_t is_copy) { void *src; duk_size_t nbytes; duk_tval *p; duk_tval *q; /* XXX: several pointer comparison issues here */ DUK_ASSERT_API_ENTRY(to_thr); DUK_CTX_ASSERT_VALID(to_thr); DUK_CTX_ASSERT_VALID(from_thr); DUK_ASSERT(to_thr->heap == from_thr->heap); if (DUK_UNLIKELY(to_thr == from_thr)) { DUK_ERROR_TYPE(to_thr, DUK_STR_INVALID_CONTEXT); DUK_WO_NORETURN(return;); } if (DUK_UNLIKELY((duk_uidx_t) count > (duk_uidx_t) DUK_USE_VALSTACK_LIMIT)) { /* Maximum value check ensures 'nbytes' won't wrap below. * Also handles negative count. */ DUK_ERROR_RANGE_INVALID_COUNT(to_thr); DUK_WO_NORETURN(return;); } DUK_ASSERT(count >= 0); nbytes = sizeof(duk_tval) * (duk_size_t) count; if (DUK_UNLIKELY(nbytes == 0)) { return; } DUK_ASSERT(to_thr->valstack_top <= to_thr->valstack_end); if (DUK_UNLIKELY((duk_size_t) ((duk_uint8_t *) to_thr->valstack_end - (duk_uint8_t *) to_thr->valstack_top) < nbytes)) { DUK_ERROR_RANGE_PUSH_BEYOND(to_thr); DUK_WO_NORETURN(return;); } src = (void *) ((duk_uint8_t *) from_thr->valstack_top - nbytes); if (DUK_UNLIKELY(src < (void *) from_thr->valstack_bottom)) { DUK_ERROR_RANGE_INVALID_COUNT(to_thr); DUK_WO_NORETURN(return;); } /* Copy values (no overlap even if to_thr == from_thr; that's not * allowed now anyway). */ DUK_ASSERT(nbytes > 0); duk_memcpy((void *) to_thr->valstack_top, (const void *) src, (size_t) nbytes); p = to_thr->valstack_top; to_thr->valstack_top = (duk_tval *) (void *) (((duk_uint8_t *) p) + nbytes); if (is_copy) { /* Incref copies, keep originals. */ q = to_thr->valstack_top; while (p < q) { DUK_TVAL_INCREF(to_thr, p); /* no side effects */ p++; } } else { /* No net refcount change. */ p = from_thr->valstack_top; q = (duk_tval *) (void *) (((duk_uint8_t *) p) - nbytes); from_thr->valstack_top = q; while (p > q) { p--; DUK_TVAL_SET_UNDEFINED(p); /* XXX: fast primitive to set a bunch of values to UNDEFINED */ } } } /* Internal helper: reserve a gap of 'count' elements at 'idx_base' and return a * pointer to the gap. Values in the gap are garbage and MUST be initialized by * the caller before any side effects may occur. The caller must ensure there's * enough stack reserve for 'count' values. */ DUK_INTERNAL duk_tval *duk_reserve_gap(duk_hthread *thr, duk_idx_t idx_base, duk_idx_t count) { duk_tval *tv_src; duk_tval *tv_dst; duk_size_t gap_bytes; duk_size_t copy_bytes; /* Caller is responsible for ensuring there's enough preallocated * value stack. */ DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(count >= 0); DUK_ASSERT((duk_size_t) (thr->valstack_end - thr->valstack_top) >= (duk_size_t) count); tv_src = thr->valstack_bottom + idx_base; gap_bytes = (duk_size_t) count * sizeof(duk_tval); tv_dst = (duk_tval *) (void *) ((duk_uint8_t *) tv_src + gap_bytes); copy_bytes = (duk_size_t) ((duk_uint8_t *) thr->valstack_top - (duk_uint8_t *) tv_src); thr->valstack_top = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack_top + gap_bytes); duk_memmove((void *) tv_dst, (const void *) tv_src, copy_bytes); /* Values in the gap are left as garbage: caller must fill them in * and INCREF them before any side effects. */ return tv_src; } /* * Get/opt/require */ DUK_EXTERNAL void duk_require_undefined(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_UNLIKELY(!DUK_TVAL_IS_UNDEFINED(tv))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "undefined", DUK_STR_NOT_UNDEFINED); DUK_WO_NORETURN(return;); } } DUK_EXTERNAL void duk_require_null(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_UNLIKELY(!DUK_TVAL_IS_NULL(tv))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "null", DUK_STR_NOT_NULL); DUK_WO_NORETURN(return;); } } DUK_LOCAL DUK_ALWAYS_INLINE duk_bool_t duk__get_boolean_raw(duk_hthread *thr, duk_idx_t idx, duk_bool_t def_value) { duk_bool_t ret; duk_tval *tv; DUK_CTX_ASSERT_VALID(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_BOOLEAN(tv)) { ret = DUK_TVAL_GET_BOOLEAN(tv); DUK_ASSERT(ret == 0 || ret == 1); } else { ret = def_value; /* Not guaranteed to be 0 or 1. */ } return ret; } DUK_EXTERNAL duk_bool_t duk_get_boolean(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__get_boolean_raw(thr, idx, 0); /* default: false */ } DUK_EXTERNAL duk_bool_t duk_get_boolean_default(duk_hthread *thr, duk_idx_t idx, duk_bool_t def_value) { DUK_ASSERT_API_ENTRY(thr); return duk__get_boolean_raw(thr, idx, def_value); } DUK_EXTERNAL duk_bool_t duk_require_boolean(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_bool_t ret; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_LIKELY(DUK_TVAL_IS_BOOLEAN(tv))) { ret = DUK_TVAL_GET_BOOLEAN(tv); DUK_ASSERT(ret == 0 || ret == 1); return ret; } else { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "boolean", DUK_STR_NOT_BOOLEAN); DUK_WO_NORETURN(return 0;); } } DUK_EXTERNAL duk_bool_t duk_opt_boolean(duk_hthread *thr, duk_idx_t idx, duk_bool_t def_value) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { return def_value; } return duk_require_boolean(thr, idx); } DUK_LOCAL DUK_ALWAYS_INLINE duk_double_t duk__get_number_raw(duk_hthread *thr, duk_idx_t idx, duk_double_t def_value) { duk_double_union ret; duk_tval *tv; DUK_CTX_ASSERT_VALID(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv)) { ret.d = (duk_double_t) DUK_TVAL_GET_FASTINT(tv); /* XXX: cast trick */ } else #endif if (DUK_TVAL_IS_DOUBLE(tv)) { /* When using packed duk_tval, number must be in NaN-normalized form * for it to be a duk_tval, so no need to normalize. NOP for unpacked * duk_tval. */ ret.d = DUK_TVAL_GET_DOUBLE(tv); DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&ret)); } else { ret.d = def_value; /* Default value (including NaN) may not be normalized. */ } return ret.d; } DUK_EXTERNAL duk_double_t duk_get_number(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__get_number_raw(thr, idx, DUK_DOUBLE_NAN); /* default: NaN */ } DUK_EXTERNAL duk_double_t duk_get_number_default(duk_hthread *thr, duk_idx_t idx, duk_double_t def_value) { DUK_ASSERT_API_ENTRY(thr); return duk__get_number_raw(thr, idx, def_value); } DUK_EXTERNAL duk_double_t duk_require_number(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_double_union ret; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_UNLIKELY(!DUK_TVAL_IS_NUMBER(tv))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "number", DUK_STR_NOT_NUMBER); DUK_WO_NORETURN(return 0.0;); } ret.d = DUK_TVAL_GET_NUMBER(tv); /* When using packed duk_tval, number must be in NaN-normalized form * for it to be a duk_tval, so no need to normalize. NOP for unpacked * duk_tval. */ DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&ret)); return ret.d; } DUK_EXTERNAL duk_double_t duk_opt_number(duk_hthread *thr, duk_idx_t idx, duk_double_t def_value) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { /* User provided default is not NaN normalized. */ return def_value; } return duk_require_number(thr, idx); } DUK_EXTERNAL duk_int_t duk_get_int(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return (duk_int_t) duk__api_coerce_d2i(thr, idx, 0 /*def_value*/, 0 /*require*/); } DUK_EXTERNAL duk_uint_t duk_get_uint(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return (duk_uint_t) duk__api_coerce_d2ui(thr, idx, 0 /*def_value*/, 0 /*require*/); } DUK_EXTERNAL duk_int_t duk_get_int_default(duk_hthread *thr, duk_idx_t idx, duk_int_t def_value) { DUK_ASSERT_API_ENTRY(thr); return (duk_int_t) duk__api_coerce_d2i(thr, idx, def_value, 0 /*require*/); } DUK_EXTERNAL duk_uint_t duk_get_uint_default(duk_hthread *thr, duk_idx_t idx, duk_uint_t def_value) { DUK_ASSERT_API_ENTRY(thr); return (duk_uint_t) duk__api_coerce_d2ui(thr, idx, def_value, 0 /*require*/); } DUK_EXTERNAL duk_int_t duk_require_int(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return (duk_int_t) duk__api_coerce_d2i(thr, idx, 0 /*def_value*/, 1 /*require*/); } DUK_EXTERNAL duk_uint_t duk_require_uint(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return (duk_uint_t) duk__api_coerce_d2ui(thr, idx, 0 /*def_value*/, 1 /*require*/); } DUK_EXTERNAL duk_int_t duk_opt_int(duk_hthread *thr, duk_idx_t idx, duk_int_t def_value) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { return def_value; } return duk_require_int(thr, idx); } DUK_EXTERNAL duk_uint_t duk_opt_uint(duk_hthread *thr, duk_idx_t idx, duk_uint_t def_value) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { return def_value; } return duk_require_uint(thr, idx); } DUK_EXTERNAL const char *duk_get_lstring(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_len) { duk_hstring *h; const char *ret; duk_size_t len; DUK_ASSERT_API_ENTRY(thr); h = duk_get_hstring(thr, idx); if (h != NULL) { len = DUK_HSTRING_GET_BYTELEN(h); ret = (const char *) DUK_HSTRING_GET_DATA(h); } else { len = 0; ret = NULL; } if (out_len != NULL) { *out_len = len; } return ret; } DUK_EXTERNAL const char *duk_require_lstring(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_len) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = duk_require_hstring(thr, idx); DUK_ASSERT(h != NULL); if (out_len) { *out_len = DUK_HSTRING_GET_BYTELEN(h); } return (const char *) DUK_HSTRING_GET_DATA(h); } DUK_INTERNAL const char *duk_require_lstring_notsymbol(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_len) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = duk_require_hstring_notsymbol(thr, idx); DUK_ASSERT(h != NULL); if (out_len) { *out_len = DUK_HSTRING_GET_BYTELEN(h); } return (const char *) DUK_HSTRING_GET_DATA(h); } DUK_EXTERNAL const char *duk_get_string(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = duk_get_hstring(thr, idx); if (h != NULL) { return (const char *) DUK_HSTRING_GET_DATA(h); } else { return NULL; } } DUK_EXTERNAL const char *duk_opt_lstring(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_len, const char *def_ptr, duk_size_t def_len) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { if (out_len != NULL) { *out_len = def_len; } return def_ptr; } return duk_require_lstring(thr, idx, out_len); } DUK_EXTERNAL const char *duk_opt_string(duk_hthread *thr, duk_idx_t idx, const char *def_ptr) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { return def_ptr; } return duk_require_string(thr, idx); } DUK_EXTERNAL const char *duk_get_lstring_default(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_len, const char *def_ptr, duk_size_t def_len) { duk_hstring *h; const char *ret; duk_size_t len; DUK_ASSERT_API_ENTRY(thr); h = duk_get_hstring(thr, idx); if (h != NULL) { len = DUK_HSTRING_GET_BYTELEN(h); ret = (const char *) DUK_HSTRING_GET_DATA(h); } else { len = def_len; ret = def_ptr; } if (out_len != NULL) { *out_len = len; } return ret; } DUK_EXTERNAL const char *duk_get_string_default(duk_hthread *thr, duk_idx_t idx, const char *def_value) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = duk_get_hstring(thr, idx); if (h != NULL) { return (const char *) DUK_HSTRING_GET_DATA(h); } else { return def_value; } } DUK_INTERNAL const char *duk_get_string_notsymbol(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = duk_get_hstring_notsymbol(thr, idx); if (h) { return (const char *) DUK_HSTRING_GET_DATA(h); } else { return NULL; } } DUK_EXTERNAL const char *duk_require_string(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk_require_lstring(thr, idx, NULL); } DUK_INTERNAL const char *duk_require_string_notsymbol(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = duk_require_hstring_notsymbol(thr, idx); DUK_ASSERT(h != NULL); return (const char *) DUK_HSTRING_GET_DATA(h); } DUK_EXTERNAL void duk_require_object(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_UNLIKELY(!DUK_TVAL_IS_OBJECT(tv))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "object", DUK_STR_NOT_OBJECT); DUK_WO_NORETURN(return;); } } DUK_LOCAL void *duk__get_pointer_raw(duk_hthread *thr, duk_idx_t idx, void *def_value) { duk_tval *tv; void *p; DUK_CTX_ASSERT_VALID(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (!DUK_TVAL_IS_POINTER(tv)) { return def_value; } p = DUK_TVAL_GET_POINTER(tv); /* may be NULL */ return p; } DUK_EXTERNAL void *duk_get_pointer(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__get_pointer_raw(thr, idx, NULL /*def_value*/); } DUK_EXTERNAL void *duk_opt_pointer(duk_hthread *thr, duk_idx_t idx, void *def_value) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { return def_value; } return duk_require_pointer(thr, idx); } DUK_EXTERNAL void *duk_get_pointer_default(duk_hthread *thr, duk_idx_t idx, void *def_value) { DUK_ASSERT_API_ENTRY(thr); return duk__get_pointer_raw(thr, idx, def_value); } DUK_EXTERNAL void *duk_require_pointer(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; void *p; DUK_ASSERT_API_ENTRY(thr); /* Note: here we must be wary of the fact that a pointer may be * valid and be a NULL. */ tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_UNLIKELY(!DUK_TVAL_IS_POINTER(tv))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "pointer", DUK_STR_NOT_POINTER); DUK_WO_NORETURN(return NULL;); } p = DUK_TVAL_GET_POINTER(tv); /* may be NULL */ return p; } #if 0 /*unused*/ DUK_INTERNAL void *duk_get_voidptr(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_heaphdr *h; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (!DUK_TVAL_IS_HEAP_ALLOCATED(tv)) { return NULL; } h = DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(h != NULL); return (void *) h; } #endif DUK_LOCAL void *duk__get_buffer_helper(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size, void *def_ptr, duk_size_t def_size, duk_bool_t throw_flag) { duk_hbuffer *h; void *ret; duk_size_t len; duk_tval *tv; DUK_CTX_ASSERT_VALID(thr); if (out_size != NULL) { *out_size = 0; } tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_LIKELY(DUK_TVAL_IS_BUFFER(tv))) { h = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h != NULL); len = DUK_HBUFFER_GET_SIZE(h); ret = DUK_HBUFFER_GET_DATA_PTR(thr->heap, h); } else { if (throw_flag) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "buffer", DUK_STR_NOT_BUFFER); DUK_WO_NORETURN(return NULL;); } len = def_size; ret = def_ptr; } if (out_size != NULL) { *out_size = len; } return ret; } DUK_EXTERNAL void *duk_get_buffer(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size) { DUK_ASSERT_API_ENTRY(thr); return duk__get_buffer_helper(thr, idx, out_size, NULL /*def_ptr*/, 0 /*def_size*/, 0 /*throw_flag*/); } DUK_EXTERNAL void *duk_opt_buffer(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size, void *def_ptr, duk_size_t def_size) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { if (out_size != NULL) { *out_size = def_size; } return def_ptr; } return duk_require_buffer(thr, idx, out_size); } DUK_EXTERNAL void *duk_get_buffer_default(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size, void *def_ptr, duk_size_t def_len) { DUK_ASSERT_API_ENTRY(thr); return duk__get_buffer_helper(thr, idx, out_size, def_ptr, def_len, 0 /*throw_flag*/); } DUK_EXTERNAL void *duk_require_buffer(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size) { DUK_ASSERT_API_ENTRY(thr); return duk__get_buffer_helper(thr, idx, out_size, NULL /*def_ptr*/, 0 /*def_size*/, 1 /*throw_flag*/); } /* Get the active buffer data area for a plain buffer or a buffer object. * Return NULL if the the value is not a buffer. Note that a buffer may * have a NULL data pointer when its size is zero, the optional 'out_isbuffer' * argument allows caller to detect this reliably. */ DUK_INTERNAL void *duk_get_buffer_data_raw(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size, void *def_ptr, duk_size_t def_size, duk_bool_t throw_flag, duk_bool_t *out_isbuffer) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); if (out_isbuffer != NULL) { *out_isbuffer = 0; } if (out_size != NULL) { *out_size = def_size; } tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_BUFFER(tv)) { duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h != NULL); if (out_size != NULL) { *out_size = DUK_HBUFFER_GET_SIZE(h); } if (out_isbuffer != NULL) { *out_isbuffer = 1; } return (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h); /* may be NULL (but only if size is 0) */ } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) else if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (DUK_HOBJECT_IS_BUFOBJ(h)) { /* XXX: this is probably a useful shared helper: for a * duk_hbufobj, get a validated buffer pointer/length. */ duk_hbufobj *h_bufobj = (duk_hbufobj *) h; DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); if (h_bufobj->buf != NULL && DUK_HBUFOBJ_VALID_SLICE(h_bufobj)) { duk_uint8_t *p; p = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf); if (out_size != NULL) { *out_size = (duk_size_t) h_bufobj->length; } if (out_isbuffer != NULL) { *out_isbuffer = 1; } return (void *) (p + h_bufobj->offset); } /* if slice not fully valid, treat as error */ } } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ if (throw_flag) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "buffer", DUK_STR_NOT_BUFFER); DUK_WO_NORETURN(return NULL;); } return def_ptr; } DUK_EXTERNAL void *duk_get_buffer_data(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size) { DUK_ASSERT_API_ENTRY(thr); return duk_get_buffer_data_raw(thr, idx, out_size, NULL /*def_ptr*/, 0 /*def_size*/, 0 /*throw_flag*/, NULL); } DUK_EXTERNAL void *duk_get_buffer_data_default(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size, void *def_ptr, duk_size_t def_size) { DUK_ASSERT_API_ENTRY(thr); return duk_get_buffer_data_raw(thr, idx, out_size, def_ptr, def_size, 0 /*throw_flag*/, NULL); } DUK_EXTERNAL void *duk_opt_buffer_data(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size, void *def_ptr, duk_size_t def_size) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { if (out_size != NULL) { *out_size = def_size; } return def_ptr; } return duk_require_buffer_data(thr, idx, out_size); } DUK_EXTERNAL void *duk_require_buffer_data(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size) { DUK_ASSERT_API_ENTRY(thr); return duk_get_buffer_data_raw(thr, idx, out_size, NULL /*def_ptr*/, 0 /*def_size*/, 1 /*throw_flag*/, NULL); } /* Raw helper for getting a value from the stack, checking its tag. * The tag cannot be a number because numbers don't have an internal * tag in the packed representation. */ DUK_LOCAL duk_heaphdr *duk__get_tagged_heaphdr_raw(duk_hthread *thr, duk_idx_t idx, duk_uint_t tag) { duk_tval *tv; duk_heaphdr *ret; DUK_CTX_ASSERT_VALID(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_TVAL_GET_TAG(tv) != tag) { return (duk_heaphdr *) NULL; } ret = DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(ret != NULL); /* tagged null pointers should never occur */ return ret; } DUK_INTERNAL duk_hstring *duk_get_hstring(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return (duk_hstring *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_STRING); } DUK_INTERNAL duk_hstring *duk_get_hstring_notsymbol(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hstring *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_STRING); if (DUK_UNLIKELY(h && DUK_HSTRING_HAS_SYMBOL(h))) { return NULL; } return h; } DUK_INTERNAL duk_hstring *duk_require_hstring(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hstring *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_STRING); if (DUK_UNLIKELY(h == NULL)) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "string", DUK_STR_NOT_STRING); DUK_WO_NORETURN(return NULL;); } return h; } DUK_INTERNAL duk_hstring *duk_require_hstring_notsymbol(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hstring *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_STRING); if (DUK_UNLIKELY(h == NULL || DUK_HSTRING_HAS_SYMBOL(h))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "string", DUK_STR_NOT_STRING); DUK_WO_NORETURN(return NULL;); } return h; } DUK_INTERNAL duk_hobject *duk_get_hobject(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); } DUK_INTERNAL duk_hobject *duk_require_hobject(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); if (DUK_UNLIKELY(h == NULL)) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "object", DUK_STR_NOT_OBJECT); DUK_WO_NORETURN(return NULL;); } return h; } DUK_INTERNAL duk_hbuffer *duk_get_hbuffer(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return (duk_hbuffer *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_BUFFER); } DUK_INTERNAL duk_hbuffer *duk_require_hbuffer(duk_hthread *thr, duk_idx_t idx) { duk_hbuffer *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hbuffer *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_BUFFER); if (DUK_UNLIKELY(h == NULL)) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "buffer", DUK_STR_NOT_BUFFER); DUK_WO_NORETURN(return NULL;); } return h; } DUK_INTERNAL duk_hthread *duk_get_hthread(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); if (DUK_UNLIKELY(h != NULL && !DUK_HOBJECT_IS_THREAD(h))) { h = NULL; } return (duk_hthread *) h; } DUK_INTERNAL duk_hthread *duk_require_hthread(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); if (DUK_UNLIKELY(!(h != NULL && DUK_HOBJECT_IS_THREAD(h)))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "thread", DUK_STR_NOT_THREAD); DUK_WO_NORETURN(return NULL;); } return (duk_hthread *) h; } DUK_INTERNAL duk_hcompfunc *duk_get_hcompfunc(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); if (DUK_UNLIKELY(h != NULL && !DUK_HOBJECT_IS_COMPFUNC(h))) { h = NULL; } return (duk_hcompfunc *) h; } DUK_INTERNAL duk_hcompfunc *duk_require_hcompfunc(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); if (DUK_UNLIKELY(!(h != NULL && DUK_HOBJECT_IS_COMPFUNC(h)))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "compiledfunction", DUK_STR_NOT_COMPFUNC); DUK_WO_NORETURN(return NULL;); } return (duk_hcompfunc *) h; } DUK_INTERNAL duk_hnatfunc *duk_get_hnatfunc(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); if (DUK_UNLIKELY(h != NULL && !DUK_HOBJECT_IS_NATFUNC(h))) { h = NULL; } return (duk_hnatfunc *) h; } DUK_INTERNAL duk_hnatfunc *duk_require_hnatfunc(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); h = (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); if (DUK_UNLIKELY(!(h != NULL && DUK_HOBJECT_IS_NATFUNC(h)))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "nativefunction", DUK_STR_NOT_NATFUNC); DUK_WO_NORETURN(return NULL;); } return (duk_hnatfunc *) h; } DUK_EXTERNAL duk_c_function duk_get_c_function(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_hobject *h; duk_hnatfunc *f; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_UNLIKELY(!DUK_TVAL_IS_OBJECT(tv))) { return NULL; } h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (DUK_UNLIKELY(!DUK_HOBJECT_IS_NATFUNC(h))) { return NULL; } DUK_ASSERT(DUK_HOBJECT_HAS_NATFUNC(h)); f = (duk_hnatfunc *) h; return f->func; } DUK_EXTERNAL duk_c_function duk_opt_c_function(duk_hthread *thr, duk_idx_t idx, duk_c_function def_value) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { return def_value; } return duk_require_c_function(thr, idx); } DUK_EXTERNAL duk_c_function duk_get_c_function_default(duk_hthread *thr, duk_idx_t idx, duk_c_function def_value) { duk_c_function ret; DUK_ASSERT_API_ENTRY(thr); ret = duk_get_c_function(thr, idx); if (ret != NULL) { return ret; } return def_value; } DUK_EXTERNAL duk_c_function duk_require_c_function(duk_hthread *thr, duk_idx_t idx) { duk_c_function ret; DUK_ASSERT_API_ENTRY(thr); ret = duk_get_c_function(thr, idx); if (DUK_UNLIKELY(!ret)) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "nativefunction", DUK_STR_NOT_NATFUNC); DUK_WO_NORETURN(return ret;); } return ret; } DUK_EXTERNAL void duk_require_function(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); if (DUK_UNLIKELY(!duk_is_function(thr, idx))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "function", DUK_STR_NOT_FUNCTION); DUK_WO_NORETURN(return;); } } DUK_EXTERNAL void duk_require_constructable(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); h = duk_require_hobject_accept_mask(thr, idx, DUK_TYPE_MASK_LIGHTFUNC); if (DUK_UNLIKELY(h != NULL && !DUK_HOBJECT_HAS_CONSTRUCTABLE(h))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "constructable", DUK_STR_NOT_CONSTRUCTABLE); DUK_WO_NORETURN(return;); } /* Lightfuncs (h == NULL) are constructable. */ } DUK_EXTERNAL duk_hthread *duk_get_context(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk_get_hthread(thr, idx); } DUK_EXTERNAL duk_hthread *duk_require_context(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk_require_hthread(thr, idx); } DUK_EXTERNAL duk_hthread *duk_opt_context(duk_hthread *thr, duk_idx_t idx, duk_hthread *def_value) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { return def_value; } return duk_require_context(thr, idx); } DUK_EXTERNAL duk_hthread *duk_get_context_default(duk_hthread *thr, duk_idx_t idx, duk_hthread *def_value) { duk_hthread *ret; DUK_ASSERT_API_ENTRY(thr); ret = duk_get_context(thr, idx); if (ret != NULL) { return ret; } return def_value; } DUK_EXTERNAL void *duk_get_heapptr(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; void *ret; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_UNLIKELY(!DUK_TVAL_IS_HEAP_ALLOCATED(tv))) { return (void *) NULL; } ret = (void *) DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(ret != NULL); return ret; } DUK_EXTERNAL void *duk_opt_heapptr(duk_hthread *thr, duk_idx_t idx, void *def_value) { DUK_ASSERT_API_ENTRY(thr); if (duk_check_type_mask(thr, idx, DUK_TYPE_MASK_NONE | DUK_TYPE_MASK_UNDEFINED)) { return def_value; } return duk_require_heapptr(thr, idx); } DUK_EXTERNAL void *duk_get_heapptr_default(duk_hthread *thr, duk_idx_t idx, void *def_value) { void *ret; DUK_ASSERT_API_ENTRY(thr); ret = duk_get_heapptr(thr, idx); if (ret != NULL) { return ret; } return def_value; } DUK_EXTERNAL void *duk_require_heapptr(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; void *ret; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_UNLIKELY(!DUK_TVAL_IS_HEAP_ALLOCATED(tv))) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "heapobject", DUK_STR_UNEXPECTED_TYPE); DUK_WO_NORETURN(return NULL;); } ret = (void *) DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(ret != NULL); return ret; } /* Internal helper for getting/requiring a duk_hobject with possible promotion. */ DUK_LOCAL duk_hobject *duk__get_hobject_promote_mask_raw(duk_hthread *thr, duk_idx_t idx, duk_uint_t type_mask) { duk_uint_t val_mask; duk_hobject *res; DUK_CTX_ASSERT_VALID(thr); res = duk_get_hobject(thr, idx); /* common case, not promoted */ if (DUK_LIKELY(res != NULL)) { DUK_ASSERT(res != NULL); return res; } val_mask = duk_get_type_mask(thr, idx); if (val_mask & type_mask) { if (type_mask & DUK_TYPE_MASK_PROMOTE) { res = duk_to_hobject(thr, idx); DUK_ASSERT(res != NULL); return res; } else { return NULL; /* accept without promoting */ } } if (type_mask & DUK_TYPE_MASK_THROW) { DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, "object", DUK_STR_NOT_OBJECT); DUK_WO_NORETURN(return NULL;); } return NULL; } /* Get a duk_hobject * at 'idx'; if the value is not an object but matches the * supplied 'type_mask', promote it to an object and return the duk_hobject *. * This is useful for call sites which want an object but also accept a plain * buffer and/or a lightfunc which gets automatically promoted to an object. * Return value is NULL if value is neither an object nor a plain type allowed * by the mask. */ DUK_INTERNAL duk_hobject *duk_get_hobject_promote_mask(duk_hthread *thr, duk_idx_t idx, duk_uint_t type_mask) { DUK_ASSERT_API_ENTRY(thr); return duk__get_hobject_promote_mask_raw(thr, idx, type_mask | DUK_TYPE_MASK_PROMOTE); } /* Like duk_get_hobject_promote_mask() but throw a TypeError instead of * returning a NULL. */ DUK_INTERNAL duk_hobject *duk_require_hobject_promote_mask(duk_hthread *thr, duk_idx_t idx, duk_uint_t type_mask) { DUK_ASSERT_API_ENTRY(thr); return duk__get_hobject_promote_mask_raw(thr, idx, type_mask | DUK_TYPE_MASK_THROW | DUK_TYPE_MASK_PROMOTE); } /* Require a duk_hobject * at 'idx'; if the value is not an object but matches the * supplied 'type_mask', return a NULL instead. Otherwise throw a TypeError. */ DUK_INTERNAL duk_hobject *duk_require_hobject_accept_mask(duk_hthread *thr, duk_idx_t idx, duk_uint_t type_mask) { DUK_ASSERT_API_ENTRY(thr); return duk__get_hobject_promote_mask_raw(thr, idx, type_mask | DUK_TYPE_MASK_THROW); } DUK_INTERNAL duk_hobject *duk_get_hobject_with_class(duk_hthread *thr, duk_idx_t idx, duk_small_uint_t classnum) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_DISABLE(classnum >= 0); /* unsigned */ DUK_ASSERT(classnum <= DUK_HOBJECT_CLASS_MAX); h = (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); if (DUK_UNLIKELY(h != NULL && DUK_HOBJECT_GET_CLASS_NUMBER(h) != classnum)) { h = NULL; } return h; } DUK_INTERNAL duk_hobject *duk_require_hobject_with_class(duk_hthread *thr, duk_idx_t idx, duk_small_uint_t classnum) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_DISABLE(classnum >= 0); /* unsigned */ DUK_ASSERT(classnum <= DUK_HOBJECT_CLASS_MAX); h = (duk_hobject *) duk__get_tagged_heaphdr_raw(thr, idx, DUK_TAG_OBJECT); if (DUK_UNLIKELY(!(h != NULL && DUK_HOBJECT_GET_CLASS_NUMBER(h) == classnum))) { duk_hstring *h_class; h_class = DUK_HTHREAD_GET_STRING(thr, DUK_HOBJECT_CLASS_NUMBER_TO_STRIDX(classnum)); DUK_UNREF(h_class); DUK_ERROR_REQUIRE_TYPE_INDEX(thr, idx, (const char *) DUK_HSTRING_GET_DATA(h_class), DUK_STR_UNEXPECTED_TYPE); DUK_WO_NORETURN(return NULL;); } return h; } DUK_EXTERNAL duk_size_t duk_get_length(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNDEFINED: case DUK_TAG_NULL: case DUK_TAG_BOOLEAN: case DUK_TAG_POINTER: return 0; #if defined(DUK_USE_PREFER_SIZE) /* String and buffer have a virtual non-configurable .length property * which is within size_t range so it can be looked up without specific * type checks. Lightfuncs inherit from %NativeFunctionPrototype% * which provides an inherited .length accessor; it could be overwritten * to produce unexpected types or values, but just number convert and * duk_size_t cast for now. */ case DUK_TAG_STRING: case DUK_TAG_BUFFER: case DUK_TAG_LIGHTFUNC: { duk_size_t ret; duk_get_prop_stridx(thr, idx, DUK_STRIDX_LENGTH); ret = (duk_size_t) duk_to_number_m1(thr); duk_pop_unsafe(thr); return ret; } #else /* DUK_USE_PREFER_SIZE */ case DUK_TAG_STRING: { duk_hstring *h = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h != NULL); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { return 0; } return (duk_size_t) DUK_HSTRING_GET_CHARLEN(h); } case DUK_TAG_BUFFER: { duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h != NULL); return (duk_size_t) DUK_HBUFFER_GET_SIZE(h); } case DUK_TAG_LIGHTFUNC: { /* We could look up the length from the lightfunc duk_tval, * but since Duktape 2.2 lightfunc .length comes from * %NativeFunctionPrototype% which can be overridden, so * look up the property explicitly. */ duk_size_t ret; duk_get_prop_stridx(thr, idx, DUK_STRIDX_LENGTH); ret = (duk_size_t) duk_to_number_m1(thr); duk_pop_unsafe(thr); return ret; } #endif /* DUK_USE_PREFER_SIZE */ case DUK_TAG_OBJECT: { duk_hobject *h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); return (duk_size_t) duk_hobject_get_length(thr, h); } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: /* number or 'unused' */ DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv) || DUK_TVAL_IS_UNUSED(tv)); return 0; } DUK_UNREACHABLE(); } /* * duk_known_xxx() helpers * * Used internally when we're 100% sure that a certain index is valid and * contains an object of a certain type. For example, if we duk_push_object() * we can then safely duk_known_hobject(thr, -1). These helpers just assert * for the index and type, and if the assumptions are not valid, memory unsafe * behavior happens. */ DUK_LOCAL duk_heaphdr *duk__known_heaphdr(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_heaphdr *h; DUK_CTX_ASSERT_VALID(thr); if (idx < 0) { tv = thr->valstack_top + idx; } else { tv = thr->valstack_bottom + idx; } DUK_ASSERT(tv >= thr->valstack_bottom); DUK_ASSERT(tv < thr->valstack_top); h = DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(h != NULL); return h; } DUK_INTERNAL duk_hstring *duk_known_hstring(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(duk_get_hstring(thr, idx) != NULL); return (duk_hstring *) duk__known_heaphdr(thr, idx); } DUK_INTERNAL duk_hobject *duk_known_hobject(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(duk_get_hobject(thr, idx) != NULL); return (duk_hobject *) duk__known_heaphdr(thr, idx); } DUK_INTERNAL duk_hbuffer *duk_known_hbuffer(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(duk_get_hbuffer(thr, idx) != NULL); return (duk_hbuffer *) duk__known_heaphdr(thr, idx); } DUK_INTERNAL duk_hcompfunc *duk_known_hcompfunc(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(duk_get_hcompfunc(thr, idx) != NULL); return (duk_hcompfunc *) duk__known_heaphdr(thr, idx); } DUK_INTERNAL duk_hnatfunc *duk_known_hnatfunc(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(duk_get_hnatfunc(thr, idx) != NULL); return (duk_hnatfunc *) duk__known_heaphdr(thr, idx); } DUK_EXTERNAL void duk_set_length(duk_hthread *thr, duk_idx_t idx, duk_size_t len) { DUK_ASSERT_API_ENTRY(thr); idx = duk_normalize_index(thr, idx); duk_push_uint(thr, (duk_uint_t) len); duk_put_prop_stridx(thr, idx, DUK_STRIDX_LENGTH); } /* * Conversions and coercions * * The conversion/coercions are in-place operations on the value stack. * Some operations are implemented here directly, while others call a * helper in duk_js_ops.c after validating arguments. */ /* E5 Section 8.12.8 */ DUK_LOCAL duk_bool_t duk__defaultvalue_coerce_attempt(duk_hthread *thr, duk_idx_t idx, duk_small_uint_t func_stridx) { if (duk_get_prop_stridx(thr, idx, func_stridx)) { /* [ ... func ] */ if (duk_is_callable(thr, -1)) { duk_dup(thr, idx); /* -> [ ... func this ] */ duk_call_method(thr, 0); /* -> [ ... retval ] */ if (duk_is_primitive(thr, -1)) { duk_replace(thr, idx); return 1; } /* [ ... retval ]; popped below */ } } duk_pop_unsafe(thr); /* [ ... func/retval ] -> [ ... ] */ return 0; } DUK_EXTERNAL void duk_to_undefined(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, idx); DUK_ASSERT(tv != NULL); DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); /* side effects */ } DUK_EXTERNAL void duk_to_null(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, idx); DUK_ASSERT(tv != NULL); DUK_TVAL_SET_NULL_UPDREF(thr, tv); /* side effects */ } /* E5 Section 9.1 */ DUK_LOCAL const char * const duk__toprim_hint_strings[3] = { "default", "string", "number" }; DUK_LOCAL void duk__to_primitive_helper(duk_hthread *thr, duk_idx_t idx, duk_int_t hint, duk_bool_t check_symbol) { /* Inline initializer for coercers[] is not allowed by old compilers like BCC. */ duk_small_uint_t coercers[2]; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(hint == DUK_HINT_NONE || hint == DUK_HINT_NUMBER || hint == DUK_HINT_STRING); idx = duk_require_normalize_index(thr, idx); /* If already primitive, return as is. */ if (!duk_check_type_mask(thr, idx, DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER)) { DUK_ASSERT(!duk_is_buffer(thr, idx)); /* duk_to_string() relies on this behavior */ return; } /* @@toPrimitive lookup. Also do for plain buffers and lightfuncs * which mimic objects. */ if (check_symbol && duk_get_method_stridx(thr, idx, DUK_STRIDX_WELLKNOWN_SYMBOL_TO_PRIMITIVE)) { DUK_ASSERT(hint >= 0 && (duk_size_t) hint < sizeof(duk__toprim_hint_strings) / sizeof(const char *)); duk_dup(thr, idx); duk_push_string(thr, duk__toprim_hint_strings[hint]); duk_call_method(thr, 1); /* [ ... method value hint ] -> [ ... res] */ if (duk_check_type_mask(thr, -1, DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER)) { goto fail; } duk_replace(thr, idx); return; } /* Objects are coerced based on E5 specification. * Lightfuncs are coerced because they behave like * objects even if they're internally a primitive * type. Same applies to plain buffers, which behave * like ArrayBuffer objects since Duktape 2.x. */ /* Hint magic for Date is unnecessary in ES2015 because of * Date.prototype[@@toPrimitive]. However, it is needed if * symbol support is not enabled. */ #if defined(DUK_USE_SYMBOL_BUILTIN) if (hint == DUK_HINT_NONE) { hint = DUK_HINT_NUMBER; } #else /* DUK_USE_SYMBOL_BUILTIN */ if (hint == DUK_HINT_NONE) { duk_small_uint_t class_number; class_number = duk_get_class_number(thr, idx); if (class_number == DUK_HOBJECT_CLASS_DATE) { hint = DUK_HINT_STRING; } else { hint = DUK_HINT_NUMBER; } } #endif /* DUK_USE_SYMBOL_BUILTIN */ coercers[0] = DUK_STRIDX_VALUE_OF; coercers[1] = DUK_STRIDX_TO_STRING; if (hint == DUK_HINT_STRING) { coercers[0] = DUK_STRIDX_TO_STRING; coercers[1] = DUK_STRIDX_VALUE_OF; } if (duk__defaultvalue_coerce_attempt(thr, idx, coercers[0])) { DUK_ASSERT(!duk_is_buffer(thr, idx)); /* duk_to_string() relies on this behavior */ return; } if (duk__defaultvalue_coerce_attempt(thr, idx, coercers[1])) { DUK_ASSERT(!duk_is_buffer(thr, idx)); /* duk_to_string() relies on this behavior */ return; } fail: DUK_ERROR_TYPE(thr, DUK_STR_TOPRIMITIVE_FAILED); DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_to_primitive(duk_hthread *thr, duk_idx_t idx, duk_int_t hint) { duk__to_primitive_helper(thr, idx, hint, 1 /*check_symbol*/); } #if defined(DUK_USE_SYMBOL_BUILTIN) DUK_INTERNAL void duk_to_primitive_ordinary(duk_hthread *thr, duk_idx_t idx, duk_int_t hint) { duk__to_primitive_helper(thr, idx, hint, 0 /*check_symbol*/); } #endif /* E5 Section 9.2 */ DUK_EXTERNAL duk_bool_t duk_to_boolean(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_bool_t val; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); tv = DUK_GET_TVAL_POSIDX(thr, idx); DUK_ASSERT(tv != NULL); val = duk_js_toboolean(tv); DUK_ASSERT(val == 0 || val == 1); /* Note: no need to re-lookup tv, conversion is side effect free. */ DUK_ASSERT(tv != NULL); DUK_TVAL_SET_BOOLEAN_UPDREF(thr, tv, val); /* side effects */ return val; } DUK_INTERNAL duk_bool_t duk_to_boolean_top_pop(duk_hthread *thr) { duk_tval *tv; duk_bool_t val; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, -1); DUK_ASSERT(tv != NULL); val = duk_js_toboolean(tv); DUK_ASSERT(val == 0 || val == 1); duk_pop_unsafe(thr); return val; } DUK_EXTERNAL duk_double_t duk_to_number(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_double_t d; DUK_ASSERT_API_ENTRY(thr); /* XXX: No need to normalize; the whole operation could be inlined here to * avoid 'tv' re-lookup. */ idx = duk_require_normalize_index(thr, idx); tv = DUK_GET_TVAL_POSIDX(thr, idx); DUK_ASSERT(tv != NULL); d = duk_js_tonumber(thr, tv); /* XXX: fastint coercion? now result will always be a non-fastint */ /* ToNumber() may have side effects so must relookup 'tv'. */ tv = DUK_GET_TVAL_POSIDX(thr, idx); DUK_TVAL_SET_NUMBER_UPDREF(thr, tv, d); /* side effects */ return d; } DUK_INTERNAL duk_double_t duk_to_number_m1(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); return duk_to_number(thr, -1); } DUK_INTERNAL duk_double_t duk_to_number_m2(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); return duk_to_number(thr, -2); } DUK_INTERNAL duk_double_t duk_to_number_tval(duk_hthread *thr, duk_tval *tv) { #if defined(DUK_USE_PREFER_SIZE) duk_double_t res; DUK_ASSERT_API_ENTRY(thr); duk_push_tval(thr, tv); res = duk_to_number_m1(thr); duk_pop_unsafe(thr); return res; #else duk_double_t res; duk_tval *tv_dst; DUK_ASSERT_API_ENTRY(thr); DUK__ASSERT_SPACE(); tv_dst = thr->valstack_top++; DUK_TVAL_SET_TVAL(tv_dst, tv); DUK_TVAL_INCREF(thr, tv_dst); /* decref not necessary */ res = duk_to_number_m1(thr); /* invalidates tv_dst */ tv_dst = --thr->valstack_top; DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_dst)); DUK_ASSERT(!DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv_dst)); /* plain number */ DUK_TVAL_SET_UNDEFINED(tv_dst); /* valstack init policy */ return res; #endif } /* XXX: combine all the integer conversions: they share everything * but the helper function for coercion. */ typedef duk_double_t (*duk__toint_coercer)(duk_hthread *thr, duk_tval *tv); DUK_LOCAL duk_double_t duk__to_int_uint_helper(duk_hthread *thr, duk_idx_t idx, duk__toint_coercer coerce_func) { duk_tval *tv; duk_double_t d; DUK_CTX_ASSERT_VALID(thr); tv = duk_require_tval(thr, idx); DUK_ASSERT(tv != NULL); #if defined(DUK_USE_FASTINT) /* If argument is a fastint, guarantee that it remains one. * There's no downgrade check for other cases. */ if (DUK_TVAL_IS_FASTINT(tv)) { /* XXX: Unnecessary conversion back and forth. */ return (duk_double_t) DUK_TVAL_GET_FASTINT(tv); } #endif d = coerce_func(thr, tv); /* XXX: fastint? */ /* Relookup in case coerce_func() has side effects, e.g. ends up coercing an object */ tv = duk_require_tval(thr, idx); DUK_TVAL_SET_NUMBER_UPDREF(thr, tv, d); /* side effects */ return d; } DUK_EXTERNAL duk_int_t duk_to_int(duk_hthread *thr, duk_idx_t idx) { /* Value coercion (in stack): ToInteger(), E5 Section 9.4, * API return value coercion: custom. */ DUK_ASSERT_API_ENTRY(thr); (void) duk__to_int_uint_helper(thr, idx, duk_js_tointeger); return (duk_int_t) duk__api_coerce_d2i(thr, idx, 0 /*def_value*/, 0 /*require*/); } DUK_EXTERNAL duk_uint_t duk_to_uint(duk_hthread *thr, duk_idx_t idx) { /* Value coercion (in stack): ToInteger(), E5 Section 9.4, * API return value coercion: custom. */ DUK_ASSERT_API_ENTRY(thr); (void) duk__to_int_uint_helper(thr, idx, duk_js_tointeger); return (duk_uint_t) duk__api_coerce_d2ui(thr, idx, 0 /*def_value*/, 0 /*require*/); } DUK_EXTERNAL duk_int32_t duk_to_int32(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_int32_t ret; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, idx); DUK_ASSERT(tv != NULL); ret = duk_js_toint32(thr, tv); /* Relookup in case coerce_func() has side effects, e.g. ends up coercing an object */ tv = duk_require_tval(thr, idx); DUK_TVAL_SET_I32_UPDREF(thr, tv, ret); /* side effects */ return ret; } DUK_EXTERNAL duk_uint32_t duk_to_uint32(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_uint32_t ret; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, idx); DUK_ASSERT(tv != NULL); ret = duk_js_touint32(thr, tv); /* Relookup in case coerce_func() has side effects, e.g. ends up coercing an object */ tv = duk_require_tval(thr, idx); DUK_TVAL_SET_U32_UPDREF(thr, tv, ret); /* side effects */ return ret; } DUK_EXTERNAL duk_uint16_t duk_to_uint16(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_uint16_t ret; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, idx); DUK_ASSERT(tv != NULL); ret = duk_js_touint16(thr, tv); /* Relookup in case coerce_func() has side effects, e.g. ends up coercing an object */ tv = duk_require_tval(thr, idx); DUK_TVAL_SET_U32_UPDREF(thr, tv, ret); /* side effects */ return ret; } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) /* Special coercion for Uint8ClampedArray. */ DUK_INTERNAL duk_uint8_t duk_to_uint8clamped(duk_hthread *thr, duk_idx_t idx) { duk_double_t d; duk_double_t t; duk_uint8_t ret; DUK_ASSERT_API_ENTRY(thr); /* XXX: Simplify this algorithm, should be possible to come up with * a shorter and faster algorithm by inspecting IEEE representation * directly. */ d = duk_to_number(thr, idx); if (d <= 0.0) { return 0; } else if (d >= 255) { return 255; } else if (DUK_ISNAN(d)) { /* Avoid NaN-to-integer coercion as it is compiler specific. */ return 0; } t = d - DUK_FLOOR(d); if (t == 0.5) { /* Exact halfway, round to even. */ ret = (duk_uint8_t) d; ret = (ret + 1) & 0xfe; /* Example: d=3.5, t=0.5 -> ret = (3 + 1) & 0xfe = 4 & 0xfe = 4 * Example: d=4.5, t=0.5 -> ret = (4 + 1) & 0xfe = 5 & 0xfe = 4 */ } else { /* Not halfway, round to nearest. */ ret = (duk_uint8_t) (d + 0.5); } return ret; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ DUK_EXTERNAL const char *duk_to_lstring(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_len) { DUK_ASSERT_API_ENTRY(thr); (void) duk_to_string(thr, idx); DUK_ASSERT(duk_is_string(thr, idx)); return duk_require_lstring(thr, idx, out_len); } DUK_LOCAL duk_ret_t duk__safe_to_string_raw(duk_hthread *thr, void *udata) { DUK_CTX_ASSERT_VALID(thr); DUK_UNREF(udata); (void) duk_to_string(thr, -1); return 1; } DUK_EXTERNAL const char *duk_safe_to_lstring(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_len) { DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); /* We intentionally ignore the duk_safe_call() return value and only * check the output type. This way we don't also need to check that * the returned value is indeed a string in the success case. */ duk_dup(thr, idx); (void) duk_safe_call(thr, duk__safe_to_string_raw, NULL /*udata*/, 1 /*nargs*/, 1 /*nrets*/); if (!duk_is_string(thr, -1)) { /* Error: try coercing error to string once. */ (void) duk_safe_call(thr, duk__safe_to_string_raw, NULL /*udata*/, 1 /*nargs*/, 1 /*nrets*/); if (!duk_is_string(thr, -1)) { /* Double error */ duk_pop_unsafe(thr); duk_push_hstring_stridx(thr, DUK_STRIDX_UC_ERROR); } else { ; } } else { /* String; may be a symbol, accepted. */ ; } DUK_ASSERT(duk_is_string(thr, -1)); duk_replace(thr, idx); DUK_ASSERT(duk_get_string(thr, idx) != NULL); return duk_get_lstring(thr, idx, out_len); } DUK_EXTERNAL const char *duk_to_stacktrace(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); /* The expected argument to the call is an Error object. The stack * trace is extracted without an inheritance-based instanceof check * so that one can also extract the stack trace of a foreign error * created in another Realm. Accept only a string .stack property. */ if (duk_is_object(thr, idx)) { (void) duk_get_prop_string(thr, idx, "stack"); if (duk_is_string(thr, -1)) { duk_replace(thr, idx); } else { duk_pop(thr); } } return duk_to_string(thr, idx); } DUK_LOCAL duk_ret_t duk__safe_to_stacktrace_raw(duk_hthread *thr, void *udata) { DUK_CTX_ASSERT_VALID(thr); DUK_UNREF(udata); (void) duk_to_stacktrace(thr, -1); return 1; } DUK_EXTERNAL const char *duk_safe_to_stacktrace(duk_hthread *thr, duk_idx_t idx) { duk_int_t rc; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); duk_dup(thr, idx); rc = duk_safe_call(thr, duk__safe_to_stacktrace_raw, NULL /*udata*/, 1 /*nargs*/, 1 /*nrets*/); if (rc != 0) { /* Coercion failed. Try to coerce the coercion itself error * to a stack trace once. If that also fails, return a fixed, * preallocated 'Error' string to avoid potential infinite loop. */ rc = duk_safe_call(thr, duk__safe_to_stacktrace_raw, NULL /*udata*/, 1 /*nargs*/, 1 /*nrets*/); if (rc != 0) { duk_pop_unsafe(thr); duk_push_hstring_stridx(thr, DUK_STRIDX_UC_ERROR); } } duk_replace(thr, idx); return duk_get_string(thr, idx); } DUK_INTERNAL duk_hstring *duk_to_property_key_hstring(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); duk_to_primitive(thr, idx, DUK_HINT_STRING); /* needed for e.g. Symbol objects */ h = duk_get_hstring(thr, idx); if (h == NULL) { /* The "is string?" check may seem unnecessary, but as things * are duk_to_hstring() invokes ToString() which fails for * symbols. But since symbols are already strings for Duktape * C API, we check for that before doing the coercion. */ h = duk_to_hstring(thr, idx); } DUK_ASSERT(h != NULL); return h; } #if defined(DUK_USE_DEBUGGER_SUPPORT) /* only needed by debugger for now */ DUK_INTERNAL duk_hstring *duk_safe_to_hstring(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); (void) duk_safe_to_string(thr, idx); DUK_ASSERT(duk_is_string(thr, idx)); DUK_ASSERT(duk_get_hstring(thr, idx) != NULL); return duk_known_hstring(thr, idx); } #endif /* Push Object.prototype.toString() output for 'tv'. */ #if 0 /* See XXX note why this variant doesn't work. */ DUK_INTERNAL void duk_push_class_string_tval(duk_hthread *thr, duk_tval *tv, duk_bool_t avoid_side_effects) { duk_uint_t stridx_bidx = 0; /* (prototype_bidx << 16) + default_tag_stridx */ DUK_ASSERT_API_ENTRY(thr); /* Conceptually for any non-undefined/null value we should do a * ToObject() coercion and look up @@toStringTag (from the object * prototype) to see if a custom tag should be used. Avoid the * actual conversion by doing a prototype lookup without the object * coercion. However, see problem below. */ duk_push_literal(thr, "[object "); /* -> [ ... "[object" ] */ switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNUSED: /* Treat like 'undefined', shouldn't happen. */ case DUK_TAG_UNDEFINED: { stridx_bidx = DUK_STRIDX_UC_UNDEFINED; goto use_stridx; } case DUK_TAG_NULL: { stridx_bidx = DUK_STRIDX_UC_NULL; goto use_stridx; } case DUK_TAG_BOOLEAN: { stridx_bidx = (DUK_BIDX_BOOLEAN_PROTOTYPE << 16) + DUK_STRIDX_UC_BOOLEAN; goto use_proto_bidx; } case DUK_TAG_POINTER: { stridx_bidx = (DUK_BIDX_POINTER_PROTOTYPE << 16) + DUK_STRIDX_UC_POINTER; goto use_proto_bidx; } case DUK_TAG_LIGHTFUNC: { stridx_bidx = (DUK_BIDX_FUNCTION_PROTOTYPE << 16) + DUK_STRIDX_UC_FUNCTION; goto use_proto_bidx; } case DUK_TAG_STRING: { duk_hstring *h; h = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h != NULL); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { /* Even without DUK_USE_SYMBOL_BUILTIN the Symbol * prototype exists so we can lookup @@toStringTag * and provide [object Symbol] for symbol values * created from C code. */ stridx_bidx = (DUK_BIDX_SYMBOL_PROTOTYPE << 16) + DUK_STRIDX_UC_SYMBOL; } else { stridx_bidx = (DUK_BIDX_STRING_PROTOTYPE << 16) + DUK_STRIDX_UC_STRING; } goto use_proto_bidx; } case DUK_TAG_OBJECT: { duk_push_tval(thr, tv); stridx_bidx = 0xffffffffUL; /* Marker value. */ goto use_pushed_object; } case DUK_TAG_BUFFER: { stridx_bidx = (DUK_BIDX_UINT8ARRAY_PROTOTYPE << 16) + DUK_STRIDX_UINT8_ARRAY; goto use_proto_bidx; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: /* Fall through to generic number case. */ #endif default: { DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); /* number (maybe fastint) */ stridx_bidx = (DUK_BIDX_NUMBER_PROTOTYPE << 16) + DUK_STRIDX_UC_NUMBER; goto use_proto_bidx; } } DUK_ASSERT(0); /* Never here. */ use_proto_bidx: DUK_ASSERT_BIDX_VALID((stridx_bidx >> 16) & 0xffffUL); duk_push_hobject(thr, thr->builtins[(stridx_bidx >> 16) & 0xffffUL]); /* Fall through. */ use_pushed_object: /* [ ... "[object" obj ] */ #if defined(DUK_USE_SYMBOL_BUILTIN) /* XXX: better handling with avoid_side_effects == 1; lookup tval * without Proxy or getter side effects, and use it in sanitized * form if it's a string. */ if (!avoid_side_effects) { /* XXX: The problem with using the prototype object as the * lookup base is that if @@toStringTag is a getter, its * 'this' binding must be the ToObject() coerced input value, * not the prototype object of the type. */ (void) duk_get_prop_stridx(thr, -1, DUK_STRIDX_WELLKNOWN_SYMBOL_TO_STRING_TAG); if (duk_is_string_notsymbol(thr, -1)) { duk_remove_m2(thr); goto finish; } duk_pop_unsafe(thr); } #endif if (stridx_bidx == 0xffffffffUL) { duk_hobject *h_obj; duk_small_uint_t classnum; h_obj = duk_known_hobject(thr, -1); DUK_ASSERT(h_obj != NULL); classnum = DUK_HOBJECT_GET_CLASS_NUMBER(h_obj); stridx_bidx = DUK_HOBJECT_CLASS_NUMBER_TO_STRIDX(classnum); } else { /* stridx_bidx already has the desired fallback stridx. */ ; } duk_pop_unsafe(thr); /* Fall through. */ use_stridx: /* [ ... "[object" ] */ duk_push_hstring_stridx(thr, stridx_bidx & 0xffffUL); finish: /* [ ... "[object" tag ] */ duk_push_literal(thr, "]"); duk_concat(thr, 3); /* [ ... "[object" tag "]" ] -> [ ... res ] */ } #endif /* 0 */ DUK_INTERNAL void duk_push_class_string_tval(duk_hthread *thr, duk_tval *tv, duk_bool_t avoid_side_effects) { duk_hobject *h_obj; duk_small_uint_t classnum; duk_small_uint_t stridx; duk_tval tv_tmp; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(tv != NULL); /* Stabilize 'tv', duk_push_literal() may trigger side effects. */ DUK_TVAL_SET_TVAL(&tv_tmp, tv); tv = &tv_tmp; /* Conceptually for any non-undefined/null value we should do a * ToObject() coercion and look up @@toStringTag (from the object * prototype) to see if a custom result should be used. We'd like to * avoid the actual conversion, but even for primitive types the * prototype may have @@toStringTag. What's worse, the @@toStringTag * property may be a getter that must get the object coerced value * (not the prototype) as its 'this' binding. * * For now, do an actual object coercion. This could be avoided by * doing a side effect free lookup to see if a getter would be invoked. * If not, the value can be read directly and the object coercion could * be avoided. This may not be worth it in practice, because * Object.prototype.toString() is usually not performance critical. */ duk_push_literal(thr, "[object "); /* -> [ ... "[object" ] */ switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNUSED: /* Treat like 'undefined', shouldn't happen. */ case DUK_TAG_UNDEFINED: { duk_push_hstring_stridx(thr, DUK_STRIDX_UC_UNDEFINED); goto finish; } case DUK_TAG_NULL: { duk_push_hstring_stridx(thr, DUK_STRIDX_UC_NULL); goto finish; } } duk_push_tval(thr, tv); tv = NULL; /* Invalidated by ToObject(). */ duk_to_object(thr, -1); /* [ ... "[object" obj ] */ #if defined(DUK_USE_SYMBOL_BUILTIN) /* XXX: better handling with avoid_side_effects == 1; lookup tval * without Proxy or getter side effects, and use it in sanitized * form if it's a string. */ if (!avoid_side_effects) { (void) duk_get_prop_stridx(thr, -1, DUK_STRIDX_WELLKNOWN_SYMBOL_TO_STRING_TAG); if (duk_is_string_notsymbol(thr, -1)) { duk_remove_m2(thr); goto finish; } duk_pop_unsafe(thr); } #else DUK_UNREF(avoid_side_effects); #endif h_obj = duk_known_hobject(thr, -1); DUK_ASSERT(h_obj != NULL); classnum = DUK_HOBJECT_GET_CLASS_NUMBER(h_obj); stridx = DUK_HOBJECT_CLASS_NUMBER_TO_STRIDX(classnum); duk_pop_unsafe(thr); duk_push_hstring_stridx(thr, stridx); finish: /* [ ... "[object" tag ] */ duk_push_literal(thr, "]"); duk_concat(thr, 3); /* [ ... "[object" tag "]" ] -> [ ... res ] */ } /* XXX: other variants like uint, u32 etc */ DUK_INTERNAL duk_int_t duk_to_int_clamped_raw(duk_hthread *thr, duk_idx_t idx, duk_int_t minval, duk_int_t maxval, duk_bool_t *out_clamped) { duk_tval *tv; duk_tval tv_tmp; duk_double_t d, dmin, dmax; duk_int_t res; duk_bool_t clamped = 0; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, idx); DUK_ASSERT(tv != NULL); d = duk_js_tointeger(thr, tv); /* E5 Section 9.4, ToInteger() */ dmin = (duk_double_t) minval; dmax = (duk_double_t) maxval; if (d < dmin) { clamped = 1; res = minval; d = dmin; } else if (d > dmax) { clamped = 1; res = maxval; d = dmax; } else { res = (duk_int_t) d; } DUK_UNREF(d); /* SCANBUILD: with suitable dmin/dmax limits 'd' is unused */ /* 'd' and 'res' agree here */ /* Relookup in case duk_js_tointeger() ends up e.g. coercing an object. */ tv = duk_get_tval(thr, idx); DUK_ASSERT(tv != NULL); /* not popped by side effect */ DUK_TVAL_SET_TVAL(&tv_tmp, tv); #if defined(DUK_USE_FASTINT) #if (DUK_INT_MAX <= 0x7fffffffL) DUK_TVAL_SET_I32(tv, res); #else /* Clamping needed if duk_int_t is 64 bits. */ if (res >= DUK_FASTINT_MIN && res <= DUK_FASTINT_MAX) { DUK_TVAL_SET_FASTINT(tv, res); } else { DUK_TVAL_SET_NUMBER(tv, d); } #endif #else DUK_TVAL_SET_NUMBER(tv, d); /* no need to incref */ #endif DUK_TVAL_DECREF(thr, &tv_tmp); /* side effects */ if (out_clamped) { *out_clamped = clamped; } else { /* coerced value is updated to value stack even when RangeError thrown */ if (clamped) { DUK_ERROR_RANGE(thr, DUK_STR_NUMBER_OUTSIDE_RANGE); DUK_WO_NORETURN(return 0;); } } return res; } DUK_INTERNAL duk_int_t duk_to_int_clamped(duk_hthread *thr, duk_idx_t idx, duk_idx_t minval, duk_idx_t maxval) { duk_bool_t dummy; DUK_ASSERT_API_ENTRY(thr); return duk_to_int_clamped_raw(thr, idx, minval, maxval, &dummy); } DUK_INTERNAL duk_int_t duk_to_int_check_range(duk_hthread *thr, duk_idx_t idx, duk_int_t minval, duk_int_t maxval) { DUK_ASSERT_API_ENTRY(thr); return duk_to_int_clamped_raw(thr, idx, minval, maxval, NULL); /* out_clamped==NULL -> RangeError if outside range */ } DUK_EXTERNAL const char *duk_to_string(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); tv = DUK_GET_TVAL_POSIDX(thr, idx); DUK_ASSERT(tv != NULL); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNDEFINED: { duk_push_hstring_stridx(thr, DUK_STRIDX_LC_UNDEFINED); break; } case DUK_TAG_NULL: { duk_push_hstring_stridx(thr, DUK_STRIDX_LC_NULL); break; } case DUK_TAG_BOOLEAN: { if (DUK_TVAL_GET_BOOLEAN(tv)) { duk_push_hstring_stridx(thr, DUK_STRIDX_TRUE); } else { duk_push_hstring_stridx(thr, DUK_STRIDX_FALSE); } break; } case DUK_TAG_STRING: { /* Nop for actual strings, TypeError for Symbols. * Because various internals rely on ToString() coercion of * internal strings, -allow- (NOP) string coercion for hidden * symbols. */ #if 1 duk_hstring *h; h = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h != NULL); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { DUK_ERROR_TYPE(thr, DUK_STR_CANNOT_STRING_COERCE_SYMBOL); DUK_WO_NORETURN(goto skip_replace;); } else { goto skip_replace; } #else goto skip_replace; #endif break; } case DUK_TAG_BUFFER: /* Go through Uint8Array.prototype.toString() for coercion. */ case DUK_TAG_OBJECT: { /* Plain buffers: go through ArrayBuffer.prototype.toString() * for coercion. * * Symbol objects: duk_to_primitive() results in a plain symbol * value, and duk_to_string() then causes a TypeError. */ duk_to_primitive(thr, idx, DUK_HINT_STRING); DUK_ASSERT(!duk_is_buffer(thr, idx)); /* ToPrimitive() must guarantee */ DUK_ASSERT(!duk_is_object(thr, idx)); return duk_to_string(thr, idx); /* Note: recursive call */ } case DUK_TAG_POINTER: { void *ptr = DUK_TVAL_GET_POINTER(tv); if (ptr != NULL) { duk_push_sprintf(thr, DUK_STR_FMT_PTR, (void *) ptr); } else { /* Represent a null pointer as 'null' to be consistent with * the JX format variant. Native '%p' format for a NULL * pointer may be e.g. '(nil)'. */ duk_push_hstring_stridx(thr, DUK_STRIDX_LC_NULL); } break; } case DUK_TAG_LIGHTFUNC: { /* Should match Function.prototype.toString() */ duk_push_lightfunc_tostring(thr, tv); break; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: { /* number */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); duk_push_tval(thr, tv); duk_numconv_stringify(thr, 10 /*radix*/, 0 /*precision:shortest*/, 0 /*force_exponential*/); break; } } duk_replace(thr, idx); skip_replace: DUK_ASSERT(duk_is_string(thr, idx)); return duk_require_string(thr, idx); } DUK_INTERNAL duk_hstring *duk_to_hstring(duk_hthread *thr, duk_idx_t idx) { duk_hstring *ret; DUK_ASSERT_API_ENTRY(thr); duk_to_string(thr, idx); ret = duk_get_hstring(thr, idx); DUK_ASSERT(ret != NULL); return ret; } DUK_INTERNAL duk_hstring *duk_to_hstring_m1(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); return duk_to_hstring(thr, -1); } DUK_INTERNAL duk_hstring *duk_to_hstring_acceptsymbol(duk_hthread *thr, duk_idx_t idx) { duk_hstring *ret; DUK_ASSERT_API_ENTRY(thr); ret = duk_get_hstring(thr, idx); if (DUK_UNLIKELY(ret && DUK_HSTRING_HAS_SYMBOL(ret))) { return ret; } return duk_to_hstring(thr, idx); } /* Convert a plain buffer or any buffer object into a string, using the buffer * bytes 1:1 in the internal string representation. For views the active byte * slice (not element slice interpreted as an initializer) is used. This is * necessary in Duktape 2.x because ToString(plainBuffer) no longer creates a * string with the same bytes as in the buffer but rather (usually) * '[object ArrayBuffer]'. */ DUK_EXTERNAL const char *duk_buffer_to_string(duk_hthread *thr, duk_idx_t idx) { void *ptr_src; duk_size_t len; const char *res; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); ptr_src = duk_require_buffer_data(thr, idx, &len); DUK_ASSERT(ptr_src != NULL || len == 0); res = duk_push_lstring(thr, (const char *) ptr_src, len); duk_replace(thr, idx); return res; } DUK_EXTERNAL void *duk_to_buffer_raw(duk_hthread *thr, duk_idx_t idx, duk_size_t *out_size, duk_uint_t mode) { duk_hbuffer *h_buf; const duk_uint8_t *src_data; duk_size_t src_size; duk_uint8_t *dst_data; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); h_buf = duk_get_hbuffer(thr, idx); if (h_buf != NULL) { /* Buffer is kept as is, with the fixed/dynamic nature of the * buffer only changed if requested. An external buffer * is converted into a non-external dynamic buffer in a * duk_to_dynamic_buffer() call. */ duk_uint_t tmp; duk_uint8_t *tmp_ptr; tmp_ptr = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_buf); src_data = (const duk_uint8_t *) tmp_ptr; src_size = DUK_HBUFFER_GET_SIZE(h_buf); tmp = (DUK_HBUFFER_HAS_DYNAMIC(h_buf) ? DUK_BUF_MODE_DYNAMIC : DUK_BUF_MODE_FIXED); if ((tmp == mode && !DUK_HBUFFER_HAS_EXTERNAL(h_buf)) || mode == DUK_BUF_MODE_DONTCARE) { /* Note: src_data may be NULL if input is a zero-size * dynamic buffer. */ dst_data = tmp_ptr; goto skip_copy; } } else { /* Non-buffer value is first ToString() coerced, then converted * to a buffer (fixed buffer is used unless a dynamic buffer is * explicitly requested). Symbols are rejected with a TypeError. * XXX: C API could maybe allow symbol-to-buffer coercion? */ src_data = (const duk_uint8_t *) duk_to_lstring(thr, idx, &src_size); } dst_data = (duk_uint8_t *) duk_push_buffer(thr, src_size, (mode == DUK_BUF_MODE_DYNAMIC) /*dynamic*/); /* dst_data may be NULL if size is zero. */ duk_memcpy_unsafe((void *) dst_data, (const void *) src_data, (size_t) src_size); duk_replace(thr, idx); skip_copy: if (out_size) { *out_size = src_size; } return dst_data; } DUK_EXTERNAL void *duk_to_pointer(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; void *res; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); tv = DUK_GET_TVAL_POSIDX(thr, idx); DUK_ASSERT(tv != NULL); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNDEFINED: case DUK_TAG_NULL: case DUK_TAG_BOOLEAN: res = NULL; break; case DUK_TAG_POINTER: res = DUK_TVAL_GET_POINTER(tv); break; case DUK_TAG_STRING: case DUK_TAG_OBJECT: case DUK_TAG_BUFFER: /* Heap allocated: return heap pointer which is NOT useful * for the caller, except for debugging. */ res = (void *) DUK_TVAL_GET_HEAPHDR(tv); break; case DUK_TAG_LIGHTFUNC: /* Function pointers do not always cast correctly to void * * (depends on memory and segmentation model for instance), * so they coerce to NULL. */ res = NULL; break; #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: /* number */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); res = NULL; break; } duk_push_pointer(thr, res); duk_replace(thr, idx); return res; } DUK_LOCAL void duk__push_func_from_lightfunc(duk_hthread *thr, duk_c_function func, duk_small_uint_t lf_flags) { duk_idx_t nargs; duk_uint_t flags = 0; /* shared flags for a subset of types */ duk_small_uint_t lf_len; duk_hnatfunc *nf; nargs = (duk_idx_t) DUK_LFUNC_FLAGS_GET_NARGS(lf_flags); if (nargs == DUK_LFUNC_NARGS_VARARGS) { nargs = (duk_idx_t) DUK_VARARGS; } flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_CONSTRUCTABLE | DUK_HOBJECT_FLAG_CALLABLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_NATFUNC | DUK_HOBJECT_FLAG_NEWENV | DUK_HOBJECT_FLAG_STRICT | DUK_HOBJECT_FLAG_NOTAIL | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION); (void) duk__push_c_function_raw(thr, func, nargs, flags, DUK_BIDX_NATIVE_FUNCTION_PROTOTYPE); lf_len = DUK_LFUNC_FLAGS_GET_LENGTH(lf_flags); if ((duk_idx_t) lf_len != nargs) { /* Explicit length is only needed if it differs from 'nargs'. */ duk_push_int(thr, (duk_int_t) lf_len); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_NONE); } #if defined(DUK_USE_FUNC_NAME_PROPERTY) duk_push_lightfunc_name_raw(thr, func, lf_flags); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_C); #endif nf = duk_known_hnatfunc(thr, -1); nf->magic = (duk_int16_t) DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags); } DUK_EXTERNAL void duk_to_object(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_uint_t flags = 0; /* shared flags for a subset of types */ duk_small_int_t proto = 0; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); tv = DUK_GET_TVAL_POSIDX(thr, idx); DUK_ASSERT(tv != NULL); switch (DUK_TVAL_GET_TAG(tv)) { #if !defined(DUK_USE_BUFFEROBJECT_SUPPORT) case DUK_TAG_BUFFER: /* With no bufferobject support, don't object coerce. */ #endif case DUK_TAG_UNDEFINED: case DUK_TAG_NULL: { DUK_ERROR_TYPE(thr, DUK_STR_NOT_OBJECT_COERCIBLE); DUK_WO_NORETURN(return;); break; } case DUK_TAG_BOOLEAN: { flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_BOOLEAN); proto = DUK_BIDX_BOOLEAN_PROTOTYPE; goto create_object; } case DUK_TAG_STRING: { duk_hstring *h; h = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h != NULL); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_SYMBOL); proto = DUK_BIDX_SYMBOL_PROTOTYPE; } else { flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_STRING); proto = DUK_BIDX_STRING_PROTOTYPE; } goto create_object; } case DUK_TAG_OBJECT: { /* nop */ break; } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) case DUK_TAG_BUFFER: { /* A plain buffer object coerces to a full ArrayBuffer which * is not fully transparent behavior (ToObject() should be a * nop for an object). This behavior matches lightfuncs which * also coerce to an equivalent Function object. There are * also downsides to defining ToObject(plainBuffer) as a no-op; * for example duk_to_hobject() could result in a NULL pointer. */ duk_hbuffer *h_buf; h_buf = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h_buf != NULL); duk_hbufobj_push_uint8array_from_plain(thr, h_buf); goto replace_value; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ case DUK_TAG_POINTER: { flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_POINTER); proto = DUK_BIDX_POINTER_PROTOTYPE; goto create_object; } case DUK_TAG_LIGHTFUNC: { /* Lightfunc coerces to a Function instance with concrete * properties. Since 'length' is virtual for Duktape/C * functions, don't need to define that. The result is made * extensible to mimic what happens to strings in object * coercion: * * > Object.isExtensible(Object('foo')) * true */ duk_small_uint_t lf_flags; duk_c_function func; DUK_TVAL_GET_LIGHTFUNC(tv, func, lf_flags); duk__push_func_from_lightfunc(thr, func, lf_flags); goto replace_value; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: { DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_NUMBER); proto = DUK_BIDX_NUMBER_PROTOTYPE; goto create_object; } } DUK_ASSERT(duk_is_object(thr, idx)); return; create_object: (void) duk_push_object_helper(thr, flags, proto); /* Note: Boolean prototype's internal value property is not writable, * but duk_xdef_prop_stridx() disregards the write protection. Boolean * instances are immutable. * * String and buffer special behaviors are already enabled which is not * ideal, but a write to the internal value is not affected by them. */ duk_dup(thr, idx); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE); replace_value: duk_replace(thr, idx); DUK_ASSERT(duk_is_object(thr, idx)); } DUK_INTERNAL duk_hobject *duk_to_hobject(duk_hthread *thr, duk_idx_t idx) { duk_hobject *ret; DUK_ASSERT_API_ENTRY(thr); duk_to_object(thr, idx); ret = duk_known_hobject(thr, idx); return ret; } /* * Type checking */ DUK_LOCAL duk_bool_t duk__tag_check(duk_hthread *thr, duk_idx_t idx, duk_small_uint_t tag) { duk_tval *tv; tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); return (DUK_TVAL_GET_TAG(tv) == tag); } DUK_LOCAL duk_bool_t duk__obj_flag_any_default_false(duk_hthread *thr, duk_idx_t idx, duk_uint_t flag_mask) { duk_hobject *obj; DUK_ASSERT_API_ENTRY(thr); obj = duk_get_hobject(thr, idx); if (obj) { return (DUK_HEAPHDR_CHECK_FLAG_BITS((duk_heaphdr *) obj, flag_mask) ? 1 : 0); } return 0; } DUK_INTERNAL duk_int_t duk_get_type_tval(duk_tval *tv) { DUK_ASSERT(tv != NULL); #if defined(DUK_USE_PACKED_TVAL) switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNUSED: return DUK_TYPE_NONE; case DUK_TAG_UNDEFINED: return DUK_TYPE_UNDEFINED; case DUK_TAG_NULL: return DUK_TYPE_NULL; case DUK_TAG_BOOLEAN: return DUK_TYPE_BOOLEAN; case DUK_TAG_STRING: return DUK_TYPE_STRING; case DUK_TAG_OBJECT: return DUK_TYPE_OBJECT; case DUK_TAG_BUFFER: return DUK_TYPE_BUFFER; case DUK_TAG_POINTER: return DUK_TYPE_POINTER; case DUK_TAG_LIGHTFUNC: return DUK_TYPE_LIGHTFUNC; #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: /* Note: number has no explicit tag (in 8-byte representation) */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); return DUK_TYPE_NUMBER; } #else /* DUK_USE_PACKED_TVAL */ DUK_ASSERT(DUK_TVAL_IS_VALID_TAG(tv)); DUK_ASSERT(sizeof(duk__type_from_tag) / sizeof(duk_uint_t) == DUK_TAG_MAX - DUK_TAG_MIN + 1); return (duk_int_t) duk__type_from_tag[DUK_TVAL_GET_TAG(tv) - DUK_TAG_MIN]; #endif /* DUK_USE_PACKED_TVAL */ } DUK_EXTERNAL duk_int_t duk_get_type(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); return duk_get_type_tval(tv); } #if defined(DUK_USE_VERBOSE_ERRORS) && defined(DUK_USE_PARANOID_ERRORS) DUK_LOCAL const char * const duk__type_names[] = { "none", "undefined", "null", "boolean", "number", "string", "object", "buffer", "pointer", "lightfunc" }; DUK_INTERNAL const char *duk_get_type_name(duk_hthread *thr, duk_idx_t idx) { duk_int_t type_tag; DUK_ASSERT_API_ENTRY(thr); type_tag = duk_get_type(thr, idx); DUK_ASSERT(type_tag >= DUK_TYPE_MIN && type_tag <= DUK_TYPE_MAX); DUK_ASSERT(DUK_TYPE_MIN == 0 && sizeof(duk__type_names) / sizeof(const char *) == DUK_TYPE_MAX + 1); return duk__type_names[type_tag]; } #endif /* DUK_USE_VERBOSE_ERRORS && DUK_USE_PARANOID_ERRORS */ DUK_INTERNAL duk_small_uint_t duk_get_class_number(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_hobject *obj; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_OBJECT: obj = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(obj != NULL); return DUK_HOBJECT_GET_CLASS_NUMBER(obj); case DUK_TAG_BUFFER: /* Buffers behave like Uint8Array objects. */ return DUK_HOBJECT_CLASS_UINT8ARRAY; case DUK_TAG_LIGHTFUNC: /* Lightfuncs behave like Function objects. */ return DUK_HOBJECT_CLASS_FUNCTION; default: /* Primitive or UNUSED, no class number. */ return DUK_HOBJECT_CLASS_NONE; } } DUK_EXTERNAL duk_bool_t duk_check_type(duk_hthread *thr, duk_idx_t idx, duk_int_t type) { DUK_ASSERT_API_ENTRY(thr); return (duk_get_type(thr, idx) == type) ? 1 : 0; } DUK_INTERNAL duk_uint_t duk_get_type_mask_tval(duk_tval *tv) { DUK_ASSERT(tv != NULL); #if defined(DUK_USE_PACKED_TVAL) switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNUSED: return DUK_TYPE_MASK_NONE; case DUK_TAG_UNDEFINED: return DUK_TYPE_MASK_UNDEFINED; case DUK_TAG_NULL: return DUK_TYPE_MASK_NULL; case DUK_TAG_BOOLEAN: return DUK_TYPE_MASK_BOOLEAN; case DUK_TAG_STRING: return DUK_TYPE_MASK_STRING; case DUK_TAG_OBJECT: return DUK_TYPE_MASK_OBJECT; case DUK_TAG_BUFFER: return DUK_TYPE_MASK_BUFFER; case DUK_TAG_POINTER: return DUK_TYPE_MASK_POINTER; case DUK_TAG_LIGHTFUNC: return DUK_TYPE_MASK_LIGHTFUNC; #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: /* Note: number has no explicit tag (in 8-byte representation) */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); return DUK_TYPE_MASK_NUMBER; } #else /* DUK_USE_PACKED_TVAL */ DUK_ASSERT(DUK_TVAL_IS_VALID_TAG(tv)); DUK_ASSERT(sizeof(duk__type_mask_from_tag) / sizeof(duk_uint_t) == DUK_TAG_MAX - DUK_TAG_MIN + 1); return duk__type_mask_from_tag[DUK_TVAL_GET_TAG(tv) - DUK_TAG_MIN]; #endif /* DUK_USE_PACKED_TVAL */ } DUK_EXTERNAL duk_uint_t duk_get_type_mask(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); return duk_get_type_mask_tval(tv); } DUK_EXTERNAL duk_bool_t duk_check_type_mask(duk_hthread *thr, duk_idx_t idx, duk_uint_t mask) { DUK_ASSERT_API_ENTRY(thr); if (DUK_LIKELY((duk_get_type_mask(thr, idx) & mask) != 0U)) { return 1; } if (mask & DUK_TYPE_MASK_THROW) { DUK_ERROR_TYPE(thr, DUK_STR_UNEXPECTED_TYPE); DUK_WO_NORETURN(return 0;); } return 0; } DUK_EXTERNAL duk_bool_t duk_is_undefined(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__tag_check(thr, idx, DUK_TAG_UNDEFINED); } DUK_EXTERNAL duk_bool_t duk_is_null(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__tag_check(thr, idx, DUK_TAG_NULL); } DUK_EXTERNAL duk_bool_t duk_is_boolean(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__tag_check(thr, idx, DUK_TAG_BOOLEAN); } DUK_EXTERNAL duk_bool_t duk_is_number(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); /* * Number is special because it doesn't have a specific * tag in the 8-byte representation. */ /* XXX: shorter version for unpacked representation? */ tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); return DUK_TVAL_IS_NUMBER(tv); } DUK_EXTERNAL duk_bool_t duk_is_nan(duk_hthread *thr, duk_idx_t idx) { /* XXX: This will now return false for non-numbers, even though they would * coerce to NaN (as a general rule). In particular, duk_get_number() * returns a NaN for non-numbers, so should this function also return * true for non-numbers? */ duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); /* XXX: for packed duk_tval an explicit "is number" check is unnecessary */ if (!DUK_TVAL_IS_NUMBER(tv)) { return 0; } return (duk_bool_t) DUK_ISNAN(DUK_TVAL_GET_NUMBER(tv)); } DUK_EXTERNAL duk_bool_t duk_is_string(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__tag_check(thr, idx, DUK_TAG_STRING); } DUK_INTERNAL duk_bool_t duk_is_string_notsymbol(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk_get_hstring_notsymbol(thr, idx) != NULL; } DUK_EXTERNAL duk_bool_t duk_is_object(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__tag_check(thr, idx, DUK_TAG_OBJECT); } DUK_EXTERNAL duk_bool_t duk_is_buffer(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__tag_check(thr, idx, DUK_TAG_BUFFER); } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_EXTERNAL duk_bool_t duk_is_buffer_data(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_BUFFER(tv)) { return 1; } else if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (DUK_HOBJECT_IS_BUFOBJ(h)) { return 1; } } return 0; } #else /* DUK_USE_BUFFEROBJECT_SUPPORT */ DUK_EXTERNAL duk_bool_t duk_is_buffer_data(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk_is_buffer(thr, idx); } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ DUK_EXTERNAL duk_bool_t duk_is_pointer(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__tag_check(thr, idx, DUK_TAG_POINTER); } DUK_EXTERNAL duk_bool_t duk_is_lightfunc(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__tag_check(thr, idx, DUK_TAG_LIGHTFUNC); } DUK_EXTERNAL duk_bool_t duk_is_symbol(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; DUK_ASSERT_API_ENTRY(thr); h = duk_get_hstring(thr, idx); /* Use DUK_LIKELY() here because caller may be more likely to type * check an expected symbol than not. */ if (DUK_LIKELY(h != NULL && DUK_HSTRING_HAS_SYMBOL(h))) { return 1; } return 0; } DUK_EXTERNAL duk_bool_t duk_is_array(duk_hthread *thr, duk_idx_t idx) { duk_hobject *obj; DUK_ASSERT_API_ENTRY(thr); obj = duk_get_hobject(thr, idx); if (obj) { return (DUK_HOBJECT_GET_CLASS_NUMBER(obj) == DUK_HOBJECT_CLASS_ARRAY ? 1 : 0); } return 0; } DUK_EXTERNAL duk_bool_t duk_is_function(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h; h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); return DUK_HOBJECT_HAS_CALLABLE(h) ? 1 : 0; } if (DUK_TVAL_IS_LIGHTFUNC(tv)) { return 1; } return 0; } DUK_INTERNAL duk_bool_t duk_is_callable_tval(duk_hthread *thr, duk_tval *tv) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(thr); if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h; h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); return DUK_HOBJECT_HAS_CALLABLE(h) ? 1 : 0; } if (DUK_TVAL_IS_LIGHTFUNC(tv)) { return 1; } return 0; } DUK_EXTERNAL duk_bool_t duk_is_constructable(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h; h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); return DUK_HOBJECT_HAS_CONSTRUCTABLE(h) ? 1 : 0; } if (DUK_TVAL_IS_LIGHTFUNC(tv)) { return 1; } return 0; } DUK_EXTERNAL duk_bool_t duk_is_c_function(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__obj_flag_any_default_false(thr, idx, DUK_HOBJECT_FLAG_NATFUNC); } DUK_EXTERNAL duk_bool_t duk_is_ecmascript_function(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__obj_flag_any_default_false(thr, idx, DUK_HOBJECT_FLAG_COMPFUNC); } DUK_EXTERNAL duk_bool_t duk_is_bound_function(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk__obj_flag_any_default_false(thr, idx, DUK_HOBJECT_FLAG_BOUNDFUNC); } DUK_EXTERNAL duk_bool_t duk_is_thread(duk_hthread *thr, duk_idx_t idx) { duk_hobject *obj; DUK_ASSERT_API_ENTRY(thr); obj = duk_get_hobject(thr, idx); if (obj) { return (DUK_HOBJECT_GET_CLASS_NUMBER(obj) == DUK_HOBJECT_CLASS_THREAD ? 1 : 0); } return 0; } DUK_EXTERNAL duk_bool_t duk_is_fixed_buffer(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_BUFFER(tv)) { duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h != NULL); return (DUK_HBUFFER_HAS_DYNAMIC(h) ? 0 : 1); } return 0; } DUK_EXTERNAL duk_bool_t duk_is_dynamic_buffer(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_BUFFER(tv)) { duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h != NULL); return (DUK_HBUFFER_HAS_DYNAMIC(h) && !DUK_HBUFFER_HAS_EXTERNAL(h) ? 1 : 0); } return 0; } DUK_EXTERNAL duk_bool_t duk_is_external_buffer(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_get_tval_or_unused(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_BUFFER(tv)) { duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h != NULL); return (DUK_HBUFFER_HAS_DYNAMIC(h) && DUK_HBUFFER_HAS_EXTERNAL(h) ? 1 : 0); } return 0; } DUK_EXTERNAL duk_errcode_t duk_get_error_code(duk_hthread *thr, duk_idx_t idx) { duk_hobject *h; duk_uint_t sanity; DUK_ASSERT_API_ENTRY(thr); h = duk_get_hobject(thr, idx); sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY; do { if (!h) { return DUK_ERR_NONE; } /* XXX: something more convenient? */ if (h == thr->builtins[DUK_BIDX_EVAL_ERROR_PROTOTYPE]) { return DUK_ERR_EVAL_ERROR; } if (h == thr->builtins[DUK_BIDX_RANGE_ERROR_PROTOTYPE]) { return DUK_ERR_RANGE_ERROR; } if (h == thr->builtins[DUK_BIDX_REFERENCE_ERROR_PROTOTYPE]) { return DUK_ERR_REFERENCE_ERROR; } if (h == thr->builtins[DUK_BIDX_SYNTAX_ERROR_PROTOTYPE]) { return DUK_ERR_SYNTAX_ERROR; } if (h == thr->builtins[DUK_BIDX_TYPE_ERROR_PROTOTYPE]) { return DUK_ERR_TYPE_ERROR; } if (h == thr->builtins[DUK_BIDX_URI_ERROR_PROTOTYPE]) { return DUK_ERR_URI_ERROR; } if (h == thr->builtins[DUK_BIDX_ERROR_PROTOTYPE]) { return DUK_ERR_ERROR; } h = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h); } while (--sanity > 0); return DUK_ERR_NONE; } /* * Pushers */ DUK_INTERNAL void duk_push_tval(duk_hthread *thr, duk_tval *tv) { duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(tv != NULL); DUK__CHECK_SPACE(); tv_slot = thr->valstack_top++; DUK_TVAL_SET_TVAL(tv_slot, tv); DUK_TVAL_INCREF(thr, tv); /* no side effects */ } DUK_EXTERNAL void duk_push_undefined(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); /* Because value stack init policy is 'undefined above top', * we don't need to write, just assert. */ thr->valstack_top++; DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top - 1)); } DUK_EXTERNAL void duk_push_null(duk_hthread *thr) { duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); tv_slot = thr->valstack_top++; DUK_TVAL_SET_NULL(tv_slot); } DUK_EXTERNAL void duk_push_boolean(duk_hthread *thr, duk_bool_t val) { duk_tval *tv_slot; duk_small_int_t b; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); b = (val ? 1 : 0); /* ensure value is 1 or 0 (not other non-zero) */ tv_slot = thr->valstack_top++; DUK_TVAL_SET_BOOLEAN(tv_slot, b); } DUK_EXTERNAL void duk_push_true(duk_hthread *thr) { duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); tv_slot = thr->valstack_top++; DUK_TVAL_SET_BOOLEAN_TRUE(tv_slot); } DUK_EXTERNAL void duk_push_false(duk_hthread *thr) { duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); tv_slot = thr->valstack_top++; DUK_TVAL_SET_BOOLEAN_FALSE(tv_slot); } /* normalize NaN which may not match our canonical internal NaN */ DUK_EXTERNAL void duk_push_number(duk_hthread *thr, duk_double_t val) { duk_tval *tv_slot; duk_double_union du; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); du.d = val; DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du); tv_slot = thr->valstack_top++; DUK_TVAL_SET_NUMBER(tv_slot, du.d); } DUK_EXTERNAL void duk_push_int(duk_hthread *thr, duk_int_t val) { #if defined(DUK_USE_FASTINT) duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); tv_slot = thr->valstack_top++; #if DUK_INT_MAX <= 0x7fffffffL DUK_TVAL_SET_I32(tv_slot, (duk_int32_t) val); #else if (val >= DUK_FASTINT_MIN && val <= DUK_FASTINT_MAX) { DUK_TVAL_SET_FASTINT(tv_slot, (duk_int64_t) val); } else { duk_double_t = (duk_double_t) val; DUK_TVAL_SET_NUMBER(tv_slot, d); } #endif #else /* DUK_USE_FASTINT */ duk_tval *tv_slot; duk_double_t d; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); d = (duk_double_t) val; tv_slot = thr->valstack_top++; DUK_TVAL_SET_NUMBER(tv_slot, d); #endif /* DUK_USE_FASTINT */ } DUK_EXTERNAL void duk_push_uint(duk_hthread *thr, duk_uint_t val) { #if defined(DUK_USE_FASTINT) duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); tv_slot = thr->valstack_top++; #if DUK_UINT_MAX <= 0xffffffffUL DUK_TVAL_SET_U32(tv_slot, (duk_uint32_t) val); #else if (val <= DUK_FASTINT_MAX) { /* val is unsigned so >= 0 */ /* XXX: take advantage of val being unsigned, no need to mask */ DUK_TVAL_SET_FASTINT(tv_slot, (duk_int64_t) val); } else { duk_double_t = (duk_double_t) val; DUK_TVAL_SET_NUMBER(tv_slot, d); } #endif #else /* DUK_USE_FASTINT */ duk_tval *tv_slot; duk_double_t d; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); d = (duk_double_t) val; tv_slot = thr->valstack_top++; DUK_TVAL_SET_NUMBER(tv_slot, d); #endif /* DUK_USE_FASTINT */ } DUK_EXTERNAL void duk_push_nan(duk_hthread *thr) { duk_tval *tv_slot; duk_double_union du; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); DUK_DBLUNION_SET_NAN(&du); DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du)); tv_slot = thr->valstack_top++; DUK_TVAL_SET_NUMBER(tv_slot, du.d); } DUK_EXTERNAL const char *duk_push_lstring(duk_hthread *thr, const char *str, duk_size_t len) { duk_hstring *h; duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); /* Check stack before interning (avoid hanging temp). */ DUK__CHECK_SPACE(); /* NULL with zero length represents an empty string; NULL with higher * length is also now treated like an empty string although it is * a bit dubious. This is unlike duk_push_string() which pushes a * 'null' if the input string is a NULL. */ if (DUK_UNLIKELY(str == NULL)) { len = 0U; } /* Check for maximum string length. */ if (DUK_UNLIKELY(len > DUK_HSTRING_MAX_BYTELEN)) { DUK_ERROR_RANGE(thr, DUK_STR_STRING_TOO_LONG); DUK_WO_NORETURN(return NULL;); } h = duk_heap_strtable_intern_checked(thr, (const duk_uint8_t *) str, (duk_uint32_t) len); DUK_ASSERT(h != NULL); tv_slot = thr->valstack_top++; DUK_TVAL_SET_STRING(tv_slot, h); DUK_HSTRING_INCREF(thr, h); /* no side effects */ return (const char *) DUK_HSTRING_GET_DATA(h); } DUK_EXTERNAL const char *duk_push_string(duk_hthread *thr, const char *str) { DUK_ASSERT_API_ENTRY(thr); if (str) { return duk_push_lstring(thr, str, DUK_STRLEN(str)); } else { duk_push_null(thr); return NULL; } } #if !defined(DUK_USE_PREFER_SIZE) #if defined(DUK_USE_LITCACHE_SIZE) DUK_EXTERNAL const char *duk_push_literal_raw(duk_hthread *thr, const char *str, duk_size_t len) { duk_hstring *h; duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(str != NULL); DUK_ASSERT(str[len] == (char) 0); /* Check for maximum string length. */ if (DUK_UNLIKELY(len > DUK_HSTRING_MAX_BYTELEN)) { DUK_ERROR_RANGE(thr, DUK_STR_STRING_TOO_LONG); DUK_WO_NORETURN(return NULL;); } h = duk_heap_strtable_intern_literal_checked(thr, (const duk_uint8_t *) str, (duk_uint32_t) len); DUK_ASSERT(h != NULL); tv_slot = thr->valstack_top++; DUK_TVAL_SET_STRING(tv_slot, h); DUK_HSTRING_INCREF(thr, h); /* no side effects */ return (const char *) DUK_HSTRING_GET_DATA(h); } #else /* DUK_USE_LITCACHE_SIZE */ DUK_EXTERNAL const char *duk_push_literal_raw(duk_hthread *thr, const char *str, duk_size_t len) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(str != NULL); DUK_ASSERT(str[len] == (char) 0); return duk_push_lstring(thr, str, len); } #endif /* DUK_USE_LITCACHE_SIZE */ #endif /* !DUK_USE_PREFER_SIZE */ DUK_EXTERNAL void duk_push_pointer(duk_hthread *thr, void *val) { duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); tv_slot = thr->valstack_top++; DUK_TVAL_SET_POINTER(tv_slot, val); } DUK_INTERNAL duk_hstring *duk_push_uint_to_hstring(duk_hthread *thr, duk_uint_t i) { duk_hstring *h_tmp; DUK_ASSERT_API_ENTRY(thr); /* XXX: this could be a direct DUK_SPRINTF to a buffer followed by duk_push_string() */ duk_push_uint(thr, (duk_uint_t) i); h_tmp = duk_to_hstring_m1(thr); DUK_ASSERT(h_tmp != NULL); return h_tmp; } DUK_LOCAL void duk__push_this_helper(duk_hthread *thr, duk_small_uint_t check_object_coercible) { duk_tval *tv_slot; DUK__CHECK_SPACE(); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top)); /* because of valstack init policy */ tv_slot = thr->valstack_top++; if (DUK_UNLIKELY(thr->callstack_curr == NULL)) { if (check_object_coercible) { goto type_error; } /* 'undefined' already on stack top */ } else { duk_tval *tv; /* 'this' binding is just before current activation's bottom */ DUK_ASSERT(thr->valstack_bottom > thr->valstack); tv = thr->valstack_bottom - 1; if (check_object_coercible && (DUK_TVAL_IS_UNDEFINED(tv) || DUK_TVAL_IS_NULL(tv))) { /* XXX: better macro for DUK_TVAL_IS_UNDEFINED_OR_NULL(tv) */ goto type_error; } DUK_TVAL_SET_TVAL(tv_slot, tv); DUK_TVAL_INCREF(thr, tv); } return; type_error: DUK_ERROR_TYPE(thr, DUK_STR_NOT_OBJECT_COERCIBLE); DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_push_this(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk__push_this_helper(thr, 0 /*check_object_coercible*/); } DUK_INTERNAL void duk_push_this_check_object_coercible(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk__push_this_helper(thr, 1 /*check_object_coercible*/); } DUK_INTERNAL duk_hobject *duk_push_this_coercible_to_object(duk_hthread *thr) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); duk__push_this_helper(thr, 1 /*check_object_coercible*/); h = duk_to_hobject(thr, -1); DUK_ASSERT(h != NULL); return h; } DUK_INTERNAL duk_hstring *duk_push_this_coercible_to_string(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk__push_this_helper(thr, 1 /*check_object_coercible*/); return duk_to_hstring_m1(thr); /* This will reject all Symbol values; accepts Symbol objects. */ } DUK_INTERNAL duk_tval *duk_get_borrowed_this_tval(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->callstack_top > 0); /* caller required to know */ DUK_ASSERT(thr->callstack_curr != NULL); /* caller required to know */ DUK_ASSERT(thr->valstack_bottom > thr->valstack); /* consequence of above */ DUK_ASSERT(thr->valstack_bottom - 1 >= thr->valstack); /* 'this' binding exists */ return thr->valstack_bottom - 1; } DUK_EXTERNAL void duk_push_new_target(duk_hthread *thr) { duk_activation *act; DUK_ASSERT_API_ENTRY(thr); /* https://www.ecma-international.org/ecma-262/6.0/#sec-meta-properties-runtime-semantics-evaluation * https://www.ecma-international.org/ecma-262/6.0/#sec-getnewtarget * * No newTarget support now, so as a first approximation * use the resolved (non-bound) target function. * * Check CONSTRUCT flag from current function, or if running * direct eval, from a non-direct-eval parent (with possibly * more than one nested direct eval). An alternative to this * would be to store [[NewTarget]] as a hidden symbol of the * lexical scope, and then just look up that variable. * * Calls from the application will either be for an empty * call stack, or a Duktape/C function as the top activation. */ act = thr->callstack_curr; for (;;) { if (act == NULL) { break; } if (act->flags & DUK_ACT_FLAG_CONSTRUCT) { duk_push_tval(thr, &act->tv_func); return; } else if (act->flags & DUK_ACT_FLAG_DIRECT_EVAL) { act = act->parent; } else { break; } } duk_push_undefined(thr); } DUK_EXTERNAL void duk_push_current_function(duk_hthread *thr) { duk_activation *act; DUK_ASSERT_API_ENTRY(thr); act = thr->callstack_curr; if (act != NULL) { duk_push_tval(thr, &act->tv_func); } else { duk_push_undefined(thr); } } DUK_EXTERNAL void duk_push_current_thread(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); if (thr->heap->curr_thread) { duk_push_hobject(thr, (duk_hobject *) thr->heap->curr_thread); } else { duk_push_undefined(thr); } } DUK_EXTERNAL void duk_push_global_object(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_push_hobject_bidx(thr, DUK_BIDX_GLOBAL); } /* XXX: size optimize */ DUK_LOCAL void duk__push_stash(duk_hthread *thr) { if (!duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_VALUE)) { DUK_DDD(DUK_DDDPRINT("creating heap/global/thread stash on first use")); duk_pop_unsafe(thr); duk_push_bare_object(thr); duk_dup_top(thr); duk_xdef_prop_stridx_short(thr, -3, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_C); /* [ ... parent stash stash ] -> [ ... parent stash ] */ } duk_remove_m2(thr); } DUK_EXTERNAL void duk_push_heap_stash(duk_hthread *thr) { duk_heap *heap; DUK_ASSERT_API_ENTRY(thr); heap = thr->heap; DUK_ASSERT(heap->heap_object != NULL); duk_push_hobject(thr, heap->heap_object); duk__push_stash(thr); } DUK_EXTERNAL void duk_push_global_stash(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_push_global_object(thr); duk__push_stash(thr); } DUK_EXTERNAL void duk_push_thread_stash(duk_hthread *thr, duk_hthread *target_thr) { DUK_ASSERT_API_ENTRY(thr); if (DUK_UNLIKELY(target_thr == NULL)) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return;); } duk_push_hobject(thr, (duk_hobject *) target_thr); duk__push_stash(thr); } /* XXX: duk_ssize_t would be useful here */ DUK_LOCAL duk_int_t duk__try_push_vsprintf(duk_hthread *thr, void *buf, duk_size_t sz, const char *fmt, va_list ap) { duk_int_t len; DUK_CTX_ASSERT_VALID(thr); DUK_UNREF(thr); /* NUL terminator handling doesn't matter here */ len = DUK_VSNPRINTF((char *) buf, sz, fmt, ap); if (len < (duk_int_t) sz) { /* Return value of 'sz' or more indicates output was (potentially) * truncated. */ return (duk_int_t) len; } return -1; } DUK_EXTERNAL const char *duk_push_vsprintf(duk_hthread *thr, const char *fmt, va_list ap) { duk_uint8_t stack_buf[DUK_PUSH_SPRINTF_INITIAL_SIZE]; duk_size_t sz = DUK_PUSH_SPRINTF_INITIAL_SIZE; duk_bool_t pushed_buf = 0; void *buf; duk_int_t len; /* XXX: duk_ssize_t */ const char *res; DUK_ASSERT_API_ENTRY(thr); /* special handling of fmt==NULL */ if (!fmt) { duk_hstring *h_str; duk_push_hstring_empty(thr); h_str = duk_known_hstring(thr, -1); return (const char *) DUK_HSTRING_GET_DATA(h_str); } /* initial estimate based on format string */ sz = DUK_STRLEN(fmt) + 16; /* format plus something to avoid just missing */ if (sz < DUK_PUSH_SPRINTF_INITIAL_SIZE) { sz = DUK_PUSH_SPRINTF_INITIAL_SIZE; } DUK_ASSERT(sz > 0); /* Try to make do with a stack buffer to avoid allocating a temporary buffer. * This works 99% of the time which is quite nice. */ for (;;) { va_list ap_copy; /* copied so that 'ap' can be reused */ if (sz <= sizeof(stack_buf)) { buf = stack_buf; } else if (!pushed_buf) { pushed_buf = 1; buf = duk_push_dynamic_buffer(thr, sz); } else { buf = duk_resize_buffer(thr, -1, sz); } DUK_ASSERT(buf != NULL); DUK_VA_COPY(ap_copy, ap); len = duk__try_push_vsprintf(thr, buf, sz, fmt, ap_copy); va_end(ap_copy); if (len >= 0) { break; } /* failed, resize and try again */ sz = sz * 2; if (DUK_UNLIKELY(sz >= DUK_PUSH_SPRINTF_SANITY_LIMIT)) { DUK_ERROR_RANGE(thr, DUK_STR_RESULT_TOO_LONG); DUK_WO_NORETURN(return NULL;); } } /* Cannot use duk_buffer_to_string() on the buffer because it is * usually larger than 'len'; 'buf' is also usually a stack buffer. */ res = duk_push_lstring(thr, (const char *) buf, (duk_size_t) len); /* [ buf? res ] */ if (pushed_buf) { duk_remove_m2(thr); } return res; } DUK_EXTERNAL const char *duk_push_sprintf(duk_hthread *thr, const char *fmt, ...) { va_list ap; const char *ret; DUK_ASSERT_API_ENTRY(thr); /* allow fmt==NULL */ va_start(ap, fmt); ret = duk_push_vsprintf(thr, fmt, ap); va_end(ap); return ret; } DUK_INTERNAL duk_hobject *duk_push_object_helper(duk_hthread *thr, duk_uint_t hobject_flags_and_class, duk_small_int_t prototype_bidx) { duk_tval *tv_slot; duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(prototype_bidx == -1 || (prototype_bidx >= 0 && prototype_bidx < DUK_NUM_BUILTINS)); DUK__CHECK_SPACE(); h = duk_hobject_alloc(thr, hobject_flags_and_class); DUK_ASSERT(h != NULL); DUK_DDD(DUK_DDDPRINT("created object with flags: 0x%08lx", (unsigned long) h->hdr.h_flags)); tv_slot = thr->valstack_top; DUK_TVAL_SET_OBJECT(tv_slot, h); DUK_HOBJECT_INCREF(thr, h); /* no side effects */ thr->valstack_top++; /* object is now reachable */ if (prototype_bidx >= 0) { DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, h, thr->builtins[prototype_bidx]); } else { DUK_ASSERT(prototype_bidx == -1); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h) == NULL); } return h; } DUK_INTERNAL duk_hobject *duk_push_object_helper_proto(duk_hthread *thr, duk_uint_t hobject_flags_and_class, duk_hobject *proto) { duk_hobject *h; DUK_ASSERT_API_ENTRY(thr); h = duk_push_object_helper(thr, hobject_flags_and_class, -1); DUK_ASSERT(h != NULL); DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, h, proto); return h; } DUK_EXTERNAL duk_idx_t duk_push_object(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); (void) duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT), DUK_BIDX_OBJECT_PROTOTYPE); return duk_get_top_index_unsafe(thr); } DUK_EXTERNAL duk_idx_t duk_push_array(duk_hthread *thr) { duk_uint_t flags; duk_harray *obj; duk_idx_t ret; duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_ARRAY_PART | DUK_HOBJECT_FLAG_EXOTIC_ARRAY | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARRAY); obj = duk_harray_alloc(thr, flags); DUK_ASSERT(obj != NULL); DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, (duk_hobject *) obj, thr->builtins[DUK_BIDX_ARRAY_PROTOTYPE]); tv_slot = thr->valstack_top; DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj); DUK_HOBJECT_INCREF(thr, obj); /* XXX: could preallocate with refcount = 1 */ ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom); thr->valstack_top++; DUK_ASSERT(obj->length == 0); /* Array .length starts at zero. */ return ret; } DUK_EXTERNAL duk_idx_t duk_push_bare_array(duk_hthread *thr) { duk_uint_t flags; duk_harray *obj; duk_idx_t ret; duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_ARRAY_PART | DUK_HOBJECT_FLAG_EXOTIC_ARRAY | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARRAY); obj = duk_harray_alloc(thr, flags); DUK_ASSERT(obj != NULL); tv_slot = thr->valstack_top; DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj); DUK_HOBJECT_INCREF(thr, obj); /* XXX: could preallocate with refcount = 1 */ ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom); thr->valstack_top++; DUK_ASSERT(obj->length == 0); /* Array .length starts at zero. */ return ret; } DUK_INTERNAL duk_harray *duk_push_harray(duk_hthread *thr) { /* XXX: API call could do this directly, cast to void in API macro. */ duk_harray *a; DUK_ASSERT_API_ENTRY(thr); (void) duk_push_array(thr); DUK_ASSERT(DUK_TVAL_IS_OBJECT(thr->valstack_top - 1)); a = (duk_harray *) DUK_TVAL_GET_OBJECT(thr->valstack_top - 1); DUK_ASSERT(a != NULL); return a; } /* Push a duk_harray with preallocated size (.length also set to match size). * Caller may then populate array part of the duk_harray directly. */ DUK_INTERNAL duk_harray *duk_push_harray_with_size(duk_hthread *thr, duk_uint32_t size) { duk_harray *a; DUK_ASSERT_API_ENTRY(thr); a = duk_push_harray(thr); duk_hobject_realloc_props(thr, (duk_hobject *) a, 0, size, 0, 0); a->length = size; return a; } DUK_INTERNAL duk_tval *duk_push_harray_with_size_outptr(duk_hthread *thr, duk_uint32_t size) { duk_harray *a; DUK_ASSERT_API_ENTRY(thr); a = duk_push_harray_with_size(thr, size); DUK_ASSERT(a != NULL); return DUK_HOBJECT_A_GET_BASE(thr->heap, (duk_hobject *) a); } DUK_EXTERNAL duk_idx_t duk_push_thread_raw(duk_hthread *thr, duk_uint_t flags) { duk_hthread *obj; duk_idx_t ret; duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); obj = duk_hthread_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_THREAD)); DUK_ASSERT(obj != NULL); obj->state = DUK_HTHREAD_STATE_INACTIVE; #if defined(DUK_USE_ROM_STRINGS) /* Nothing to initialize, strs[] is in ROM. */ #else #if defined(DUK_USE_HEAPPTR16) obj->strs16 = thr->strs16; #else obj->strs = thr->strs; #endif #endif DUK_DDD(DUK_DDDPRINT("created thread object with flags: 0x%08lx", (unsigned long) obj->obj.hdr.h_flags)); /* make the new thread reachable */ tv_slot = thr->valstack_top; DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj); DUK_HTHREAD_INCREF(thr, obj); ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom); thr->valstack_top++; /* important to do this *after* pushing, to make the thread reachable for gc */ if (DUK_UNLIKELY(!duk_hthread_init_stacks(thr->heap, obj))) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return 0;); } /* initialize built-ins - either by copying or creating new ones */ if (flags & DUK_THREAD_NEW_GLOBAL_ENV) { duk_hthread_create_builtin_objects(obj); } else { duk_hthread_copy_builtin_objects(thr, obj); } /* default prototype */ DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, (duk_hobject *) obj, obj->builtins[DUK_BIDX_THREAD_PROTOTYPE]); /* Initial stack size satisfies the stack slack constraints so there * is no need to require stack here. */ DUK_ASSERT(DUK_VALSTACK_INITIAL_SIZE >= DUK_VALSTACK_API_ENTRY_MINIMUM + DUK_VALSTACK_INTERNAL_EXTRA); return ret; } DUK_INTERNAL duk_hcompfunc *duk_push_hcompfunc(duk_hthread *thr) { duk_hcompfunc *obj; duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); /* Template functions are not strictly constructable (they don't * have a "prototype" property for instance), so leave the * DUK_HOBJECT_FLAG_CONSRUCTABLE flag cleared here. */ obj = duk_hcompfunc_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_CALLABLE | DUK_HOBJECT_FLAG_COMPFUNC | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION)); if (DUK_UNLIKELY(obj == NULL)) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return NULL;); } DUK_DDD(DUK_DDDPRINT("created compiled function object with flags: 0x%08lx", (unsigned long) obj->obj.hdr.h_flags)); tv_slot = thr->valstack_top; DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj); DUK_HOBJECT_INCREF(thr, obj); thr->valstack_top++; /* default prototype */ DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) obj) == NULL); DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, (duk_hobject *) obj, thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); return obj; } DUK_INTERNAL duk_hboundfunc *duk_push_hboundfunc(duk_hthread *thr) { duk_hboundfunc *obj; duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); obj = duk_hboundfunc_alloc(thr->heap, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BOUNDFUNC | DUK_HOBJECT_FLAG_CONSTRUCTABLE | DUK_HOBJECT_FLAG_CALLABLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION)); if (!obj) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return NULL;); } tv_slot = thr->valstack_top++; DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj); DUK_HOBJECT_INCREF(thr, obj); /* Prototype is left as NULL because the caller always sets it (and * it depends on the target function). */ DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) obj) == NULL); return obj; } DUK_LOCAL duk_idx_t duk__push_c_function_raw(duk_hthread *thr, duk_c_function func, duk_idx_t nargs, duk_uint_t flags, duk_small_uint_t proto_bidx) { duk_hnatfunc *obj; duk_idx_t ret; duk_tval *tv_slot; duk_int16_t func_nargs; DUK_CTX_ASSERT_VALID(thr); DUK__CHECK_SPACE(); if (DUK_UNLIKELY(func == NULL)) { goto api_error; } if (nargs >= 0 && nargs < DUK_HNATFUNC_NARGS_MAX) { func_nargs = (duk_int16_t) nargs; } else if (nargs == DUK_VARARGS) { func_nargs = DUK_HNATFUNC_NARGS_VARARGS; } else { goto api_error; } obj = duk_hnatfunc_alloc(thr, flags); DUK_ASSERT(obj != NULL); obj->func = func; obj->nargs = func_nargs; DUK_DDD(DUK_DDDPRINT("created native function object with flags: 0x%08lx, nargs=%ld", (unsigned long) obj->obj.hdr.h_flags, (long) obj->nargs)); tv_slot = thr->valstack_top; DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj); DUK_HOBJECT_INCREF(thr, obj); ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom); thr->valstack_top++; DUK_ASSERT_BIDX_VALID(proto_bidx); DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, (duk_hobject *) obj, thr->builtins[proto_bidx]); return ret; api_error: DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return 0;); } DUK_EXTERNAL duk_idx_t duk_push_c_function(duk_hthread *thr, duk_c_function func, duk_int_t nargs) { duk_uint_t flags; DUK_ASSERT_API_ENTRY(thr); flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_CONSTRUCTABLE | DUK_HOBJECT_FLAG_CALLABLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_NATFUNC | DUK_HOBJECT_FLAG_NEWENV | DUK_HOBJECT_FLAG_STRICT | DUK_HOBJECT_FLAG_NOTAIL | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION); /* Default prototype is a Duktape specific %NativeFunctionPrototype% * which provides .length and .name getters. */ return duk__push_c_function_raw(thr, func, nargs, flags, DUK_BIDX_NATIVE_FUNCTION_PROTOTYPE); } DUK_INTERNAL void duk_push_c_function_builtin(duk_hthread *thr, duk_c_function func, duk_int_t nargs) { duk_uint_t flags; DUK_ASSERT_API_ENTRY(thr); flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_CONSTRUCTABLE | DUK_HOBJECT_FLAG_CALLABLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_NATFUNC | DUK_HOBJECT_FLAG_NEWENV | DUK_HOBJECT_FLAG_STRICT | DUK_HOBJECT_FLAG_NOTAIL | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION); /* Must use Function.prototype for standard built-in functions. */ (void) duk__push_c_function_raw(thr, func, nargs, flags, DUK_BIDX_FUNCTION_PROTOTYPE); } DUK_INTERNAL void duk_push_c_function_builtin_noconstruct(duk_hthread *thr, duk_c_function func, duk_int_t nargs) { duk_uint_t flags; DUK_ASSERT_API_ENTRY(thr); flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_CALLABLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_NATFUNC | DUK_HOBJECT_FLAG_NEWENV | DUK_HOBJECT_FLAG_STRICT | DUK_HOBJECT_FLAG_NOTAIL | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION); /* Must use Function.prototype for standard built-in functions. */ (void) duk__push_c_function_raw(thr, func, nargs, flags, DUK_BIDX_FUNCTION_PROTOTYPE); } DUK_EXTERNAL duk_idx_t duk_push_c_lightfunc(duk_hthread *thr, duk_c_function func, duk_idx_t nargs, duk_idx_t length, duk_int_t magic) { duk_small_uint_t lf_flags; duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); if (nargs >= DUK_LFUNC_NARGS_MIN && nargs <= DUK_LFUNC_NARGS_MAX) { /* as is */ } else if (nargs == DUK_VARARGS) { nargs = DUK_LFUNC_NARGS_VARARGS; } else { goto api_error; } if (DUK_UNLIKELY(!(length >= DUK_LFUNC_LENGTH_MIN && length <= DUK_LFUNC_LENGTH_MAX))) { goto api_error; } if (DUK_UNLIKELY(!(magic >= DUK_LFUNC_MAGIC_MIN && magic <= DUK_LFUNC_MAGIC_MAX))) { goto api_error; } lf_flags = DUK_LFUNC_FLAGS_PACK((duk_small_int_t) magic, (duk_small_uint_t) length, (duk_small_uint_t) nargs); tv_slot = thr->valstack_top++; DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv_slot)); DUK_TVAL_SET_LIGHTFUNC(tv_slot, func, lf_flags); DUK_ASSERT(tv_slot >= thr->valstack_bottom); return (duk_idx_t) (tv_slot - thr->valstack_bottom); api_error: DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return 0;); } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_hbufobj *duk_push_bufobj_raw(duk_hthread *thr, duk_uint_t hobject_flags_and_class, duk_small_int_t prototype_bidx) { duk_hbufobj *obj; duk_tval *tv_slot; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(prototype_bidx >= 0); DUK__CHECK_SPACE(); obj = duk_hbufobj_alloc(thr, hobject_flags_and_class); DUK_ASSERT(obj != NULL); DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, (duk_hobject *) obj, thr->builtins[prototype_bidx]); DUK_HBUFOBJ_ASSERT_VALID(obj); tv_slot = thr->valstack_top; DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj); DUK_HOBJECT_INCREF(thr, obj); thr->valstack_top++; return obj; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* XXX: There's quite a bit of overlap with buffer creation handling in * duk_bi_buffer.c. Look for overlap and refactor. */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) #define DUK__PACK_ARGS(classnum,protobidx,elemtype,elemshift,istypedarray) \ (((classnum) << 24) | ((protobidx) << 16) | ((elemtype) << 8) | ((elemshift) << 4) | (istypedarray)) static const duk_uint32_t duk__bufobj_flags_lookup[] = { /* Node.js Buffers are Uint8Array instances which inherit from Buffer.prototype. */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_ARRAYBUFFER, DUK_BIDX_ARRAYBUFFER_PROTOTYPE, DUK_HBUFOBJ_ELEM_UINT8, 0, 0), /* DUK_BUFOBJ_ARRAYBUFFER */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_UINT8ARRAY, DUK_BIDX_NODEJS_BUFFER_PROTOTYPE, DUK_HBUFOBJ_ELEM_UINT8, 0, 1), /* DUK_BUFOBJ_NODEJS_BUFFER */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_DATAVIEW, DUK_BIDX_DATAVIEW_PROTOTYPE, DUK_HBUFOBJ_ELEM_UINT8, 0, 0), /* DUK_BUFOBJ_DATAVIEW */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_INT8ARRAY, DUK_BIDX_INT8ARRAY_PROTOTYPE, DUK_HBUFOBJ_ELEM_INT8, 0, 1), /* DUK_BUFOBJ_INT8ARRAY */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_UINT8ARRAY, DUK_BIDX_UINT8ARRAY_PROTOTYPE, DUK_HBUFOBJ_ELEM_UINT8, 0, 1), /* DUK_BUFOBJ_UINT8ARRAY */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY, DUK_BIDX_UINT8CLAMPEDARRAY_PROTOTYPE, DUK_HBUFOBJ_ELEM_UINT8CLAMPED, 0, 1), /* DUK_BUFOBJ_UINT8CLAMPEDARRAY */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_INT16ARRAY, DUK_BIDX_INT16ARRAY_PROTOTYPE, DUK_HBUFOBJ_ELEM_INT16, 1, 1), /* DUK_BUFOBJ_INT16ARRAY */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_UINT16ARRAY, DUK_BIDX_UINT16ARRAY_PROTOTYPE, DUK_HBUFOBJ_ELEM_UINT16, 1, 1), /* DUK_BUFOBJ_UINT16ARRAY */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_INT32ARRAY, DUK_BIDX_INT32ARRAY_PROTOTYPE, DUK_HBUFOBJ_ELEM_INT32, 2, 1), /* DUK_BUFOBJ_INT32ARRAY */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_UINT32ARRAY, DUK_BIDX_UINT32ARRAY_PROTOTYPE, DUK_HBUFOBJ_ELEM_UINT32, 2, 1), /* DUK_BUFOBJ_UINT32ARRAY */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_FLOAT32ARRAY, DUK_BIDX_FLOAT32ARRAY_PROTOTYPE, DUK_HBUFOBJ_ELEM_FLOAT32, 2, 1), /* DUK_BUFOBJ_FLOAT32ARRAY */ DUK__PACK_ARGS(DUK_HOBJECT_CLASS_FLOAT64ARRAY, DUK_BIDX_FLOAT64ARRAY_PROTOTYPE, DUK_HBUFOBJ_ELEM_FLOAT64, 3, 1) /* DUK_BUFOBJ_FLOAT64ARRAY */ }; #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_EXTERNAL void duk_push_buffer_object(duk_hthread *thr, duk_idx_t idx_buffer, duk_size_t byte_offset, duk_size_t byte_length, duk_uint_t flags) { duk_hbufobj *h_bufobj; duk_hbuffer *h_val; duk_hobject *h_arraybuf; duk_uint32_t tmp; duk_uint_t classnum; duk_uint_t protobidx; duk_uint_t lookupidx; duk_uint_t uint_offset, uint_length, uint_added; DUK_ASSERT_API_ENTRY(thr); /* The underlying types for offset/length in duk_hbufobj is * duk_uint_t; make sure argument values fit. */ uint_offset = (duk_uint_t) byte_offset; uint_length = (duk_uint_t) byte_length; if (sizeof(duk_size_t) != sizeof(duk_uint_t)) { if (DUK_UNLIKELY((duk_size_t) uint_offset != byte_offset || (duk_size_t) uint_length != byte_length)) { goto range_error; } } DUK_ASSERT_DISABLE(flags >= 0); /* flags is unsigned */ lookupidx = flags; if (DUK_UNLIKELY(lookupidx >= sizeof(duk__bufobj_flags_lookup) / sizeof(duk_uint32_t))) { goto arg_error; } tmp = duk__bufobj_flags_lookup[lookupidx]; classnum = tmp >> 24; protobidx = (tmp >> 16) & 0xff; h_arraybuf = duk_get_hobject(thr, idx_buffer); if (h_arraybuf != NULL && /* argument is an object */ flags != DUK_BUFOBJ_ARRAYBUFFER && /* creating a view */ DUK_HOBJECT_GET_CLASS_NUMBER(h_arraybuf) == DUK_HOBJECT_CLASS_ARRAYBUFFER /* argument is ArrayBuffer */) { duk_uint_t tmp_offset; DUK_HBUFOBJ_ASSERT_VALID((duk_hbufobj *) h_arraybuf); h_val = ((duk_hbufobj *) h_arraybuf)->buf; if (DUK_UNLIKELY(h_val == NULL)) { goto arg_error; } tmp_offset = uint_offset + ((duk_hbufobj *) h_arraybuf)->offset; if (DUK_UNLIKELY(tmp_offset < uint_offset)) { goto range_error; } uint_offset = tmp_offset; /* Note intentional difference to new TypedArray(): we allow * caller to create an uncovered typed array (which is memory * safe); new TypedArray() rejects it. */ } else { /* Handle unexpected object arguments here too, for nice error * messages. */ h_arraybuf = NULL; h_val = duk_require_hbuffer(thr, idx_buffer); } /* Wrap check for offset+length. */ uint_added = uint_offset + uint_length; if (DUK_UNLIKELY(uint_added < uint_offset)) { goto range_error; } DUK_ASSERT(uint_added >= uint_offset && uint_added >= uint_length); DUK_ASSERT(h_val != NULL); h_bufobj = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(classnum), (duk_small_int_t) protobidx); DUK_ASSERT(h_bufobj != NULL); h_bufobj->buf = h_val; DUK_HBUFFER_INCREF(thr, h_val); h_bufobj->buf_prop = h_arraybuf; DUK_HOBJECT_INCREF_ALLOWNULL(thr, h_arraybuf); h_bufobj->offset = uint_offset; h_bufobj->length = uint_length; h_bufobj->shift = (tmp >> 4) & 0x0f; h_bufobj->elem_type = (tmp >> 8) & 0xff; h_bufobj->is_typedarray = tmp & 0x0f; DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); /* TypedArray views need an automatic ArrayBuffer which must be * provided as .buffer property of the view. The ArrayBuffer is * referenced via duk_hbufobj->buf_prop and an inherited .buffer * accessor returns it. The ArrayBuffer is created lazily on first * access if necessary so we don't need to do anything more here. */ return; range_error: DUK_ERROR_RANGE(thr, DUK_STR_INVALID_ARGS); DUK_WO_NORETURN(return;); arg_error: DUK_ERROR_TYPE(thr, DUK_STR_INVALID_ARGS); DUK_WO_NORETURN(return;); } #else /* DUK_USE_BUFFEROBJECT_SUPPORT */ DUK_EXTERNAL void duk_push_buffer_object(duk_hthread *thr, duk_idx_t idx_buffer, duk_size_t byte_offset, duk_size_t byte_length, duk_uint_t flags) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(idx_buffer); DUK_UNREF(byte_offset); DUK_UNREF(byte_length); DUK_UNREF(flags); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return;); } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ DUK_EXTERNAL duk_idx_t duk_push_error_object_va_raw(duk_hthread *thr, duk_errcode_t err_code, const char *filename, duk_int_t line, const char *fmt, va_list ap) { duk_hobject *proto; #if defined(DUK_USE_AUGMENT_ERROR_CREATE) duk_small_uint_t augment_flags; #endif DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr != NULL); DUK_UNREF(filename); DUK_UNREF(line); /* Error code also packs a tracedata related flag. */ #if defined(DUK_USE_AUGMENT_ERROR_CREATE) augment_flags = 0; if (err_code & DUK_ERRCODE_FLAG_NOBLAME_FILELINE) { augment_flags = DUK_AUGMENT_FLAG_NOBLAME_FILELINE; } #endif err_code = err_code & (~DUK_ERRCODE_FLAG_NOBLAME_FILELINE); /* error gets its 'name' from the prototype */ proto = duk_error_prototype_from_code(thr, err_code); (void) duk_push_object_helper_proto(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ERROR), proto); /* ... and its 'message' from an instance property */ if (fmt) { duk_push_vsprintf(thr, fmt, ap); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_MESSAGE, DUK_PROPDESC_FLAGS_WC); } else { /* If no explicit message given, put error code into message field * (as a number). This is not fully in keeping with the ECMAScript * error model because messages are supposed to be strings (Error * constructors use ToString() on their argument). However, it's * probably more useful than having a separate 'code' property. */ duk_push_int(thr, err_code); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_MESSAGE, DUK_PROPDESC_FLAGS_WC); } /* XXX: .code = err_code disabled, not sure if useful */ /* Creation time error augmentation */ #if defined(DUK_USE_AUGMENT_ERROR_CREATE) /* filename may be NULL in which case file/line is not recorded */ duk_err_augment_error_create(thr, thr, filename, line, augment_flags); /* may throw an error */ #endif return duk_get_top_index_unsafe(thr); } DUK_EXTERNAL duk_idx_t duk_push_error_object_raw(duk_hthread *thr, duk_errcode_t err_code, const char *filename, duk_int_t line, const char *fmt, ...) { va_list ap; duk_idx_t ret; DUK_ASSERT_API_ENTRY(thr); va_start(ap, fmt); ret = duk_push_error_object_va_raw(thr, err_code, filename, line, fmt, ap); va_end(ap); return ret; } #if !defined(DUK_USE_VARIADIC_MACROS) DUK_EXTERNAL duk_idx_t duk_push_error_object_stash(duk_hthread *thr, duk_errcode_t err_code, const char *fmt, ...) { const char *filename = duk_api_global_filename; duk_int_t line = duk_api_global_line; va_list ap; duk_idx_t ret; DUK_ASSERT_API_ENTRY(thr); duk_api_global_filename = NULL; duk_api_global_line = 0; va_start(ap, fmt); ret = duk_push_error_object_va_raw(thr, err_code, filename, line, fmt, ap); va_end(ap); return ret; } #endif /* DUK_USE_VARIADIC_MACROS */ DUK_EXTERNAL void *duk_push_buffer_raw(duk_hthread *thr, duk_size_t size, duk_small_uint_t flags) { duk_tval *tv_slot; duk_hbuffer *h; void *buf_data; DUK_ASSERT_API_ENTRY(thr); DUK__CHECK_SPACE(); /* Check for maximum buffer length. */ if (DUK_UNLIKELY(size > DUK_HBUFFER_MAX_BYTELEN)) { DUK_ERROR_RANGE(thr, DUK_STR_BUFFER_TOO_LONG); DUK_WO_NORETURN(return NULL;); } h = duk_hbuffer_alloc(thr->heap, size, flags, &buf_data); if (DUK_UNLIKELY(h == NULL)) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return NULL;); } tv_slot = thr->valstack_top; DUK_TVAL_SET_BUFFER(tv_slot, h); DUK_HBUFFER_INCREF(thr, h); thr->valstack_top++; return (void *) buf_data; } DUK_INTERNAL void *duk_push_fixed_buffer_nozero(duk_hthread *thr, duk_size_t len) { DUK_ASSERT_API_ENTRY(thr); return duk_push_buffer_raw(thr, len, DUK_BUF_FLAG_NOZERO); } DUK_INTERNAL void *duk_push_fixed_buffer_zero(duk_hthread *thr, duk_size_t len) { void *ptr; DUK_ASSERT_API_ENTRY(thr); ptr = duk_push_buffer_raw(thr, len, 0); DUK_ASSERT(ptr != NULL); #if !defined(DUK_USE_ZERO_BUFFER_DATA) /* ES2015 requires zeroing even when DUK_USE_ZERO_BUFFER_DATA * is not set. */ duk_memzero((void *) ptr, (size_t) len); #endif return ptr; } #if defined(DUK_USE_ES6_PROXY) DUK_EXTERNAL duk_idx_t duk_push_proxy(duk_hthread *thr, duk_uint_t proxy_flags) { duk_hobject *h_target; duk_hobject *h_handler; duk_hproxy *h_proxy; duk_tval *tv_slot; duk_uint_t flags; DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(proxy_flags); /* DUK__CHECK_SPACE() unnecessary because the Proxy is written to * value stack in-place. */ #if 0 DUK__CHECK_SPACE(); #endif /* Reject a proxy object as the target because it would need * special handling in property lookups. (ES2015 has no such * restriction.) */ h_target = duk_require_hobject_promote_mask(thr, -2, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); DUK_ASSERT(h_target != NULL); if (DUK_HOBJECT_IS_PROXY(h_target)) { goto fail_args; } /* Reject a proxy object as the handler because it would cause * potentially unbounded recursion. (ES2015 has no such * restriction.) * * There's little practical reason to use a lightfunc or a plain * buffer as the handler table: one could only provide traps via * their prototype objects (Function.prototype and ArrayBuffer.prototype). * Even so, as lightfuncs and plain buffers mimic their object * counterparts, they're promoted and accepted here. */ h_handler = duk_require_hobject_promote_mask(thr, -1, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); DUK_ASSERT(h_handler != NULL); if (DUK_HOBJECT_IS_PROXY(h_handler)) { goto fail_args; } /* XXX: Proxy object currently has no prototype, so ToPrimitive() * coercion fails which is a bit confusing. */ /* CALLABLE and CONSTRUCTABLE flags are copied from the (initial) * target, see ES2015 Sections 9.5.15 and 9.5.13. */ flags = DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) h_target) & (DUK_HOBJECT_FLAG_CALLABLE | DUK_HOBJECT_FLAG_CONSTRUCTABLE); flags |= DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ; if (flags & DUK_HOBJECT_FLAG_CALLABLE) { flags |= DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION) | DUK_HOBJECT_FLAG_SPECIAL_CALL; } else { flags |= DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT); } h_proxy = duk_hproxy_alloc(thr, flags); DUK_ASSERT(h_proxy != NULL); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) h_proxy) == NULL); /* Initialize Proxy target and handler references; avoid INCREF * by stealing the value stack refcounts via direct value stack * manipulation. INCREF is needed for the Proxy itself however. */ DUK_ASSERT(h_target != NULL); h_proxy->target = h_target; DUK_ASSERT(h_handler != NULL); h_proxy->handler = h_handler; DUK_HPROXY_ASSERT_VALID(h_proxy); DUK_ASSERT(duk_get_hobject(thr, -2) == h_target); DUK_ASSERT(duk_get_hobject(thr, -1) == h_handler); tv_slot = thr->valstack_top - 2; DUK_ASSERT(tv_slot >= thr->valstack_bottom); DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) h_proxy); DUK_HOBJECT_INCREF(thr, (duk_hobject *) h_proxy); tv_slot++; DUK_TVAL_SET_UNDEFINED(tv_slot); /* [ ... target handler ] -> [ ... proxy undefined ] */ thr->valstack_top = tv_slot; /* -> [ ... proxy ] */ DUK_DD(DUK_DDPRINT("created Proxy: %!iT", duk_get_tval(thr, -1))); return (duk_idx_t) (thr->valstack_top - thr->valstack_bottom - 1); fail_args: DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return 0;); } #else /* DUK_USE_ES6_PROXY */ DUK_EXTERNAL duk_idx_t duk_push_proxy(duk_hthread *thr, duk_uint_t proxy_flags) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(proxy_flags); DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return 0;); } #endif /* DUK_USE_ES6_PROXY */ #if defined(DUK_USE_ASSERTIONS) DUK_LOCAL void duk__validate_push_heapptr(duk_hthread *thr, void *ptr) { duk_heaphdr *h; duk_heaphdr *curr; duk_bool_t found = 0; h = (duk_heaphdr *) ptr; if (h == NULL) { /* Allowed. */ return; } DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h)); /* One particular problem case is where an object has been * queued for finalization but the finalizer hasn't yet been * executed. * * Corner case: we're running in a finalizer for object X, and * user code calls duk_push_heapptr() for X itself. In this * case X will be in finalize_list, and we can detect the case * by seeing that X's FINALIZED flag is set (which is done before * the finalizer starts executing). */ #if defined(DUK_USE_FINALIZER_SUPPORT) for (curr = thr->heap->finalize_list; curr != NULL; curr = DUK_HEAPHDR_GET_NEXT(thr->heap, curr)) { /* FINALIZABLE is set for all objects on finalize_list * except for an object being finalized right now. So * can't assert here. */ #if 0 DUK_ASSERT(DUK_HEAPHDR_HAS_FINALIZABLE(curr)); #endif if (curr == h) { if (DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) h)) { /* Object is currently being finalized. */ DUK_ASSERT(found == 0); /* Would indicate corrupted lists. */ found = 1; } else { /* Not being finalized but on finalize_list, * allowed since Duktape 2.1. */ DUK_ASSERT(found == 0); /* Would indicate corrupted lists. */ found = 1; } } } #endif /* DUK_USE_FINALIZER_SUPPORT */ #if defined(DUK_USE_REFERENCE_COUNTING) /* Because refzero_list is now processed to completion inline with * no side effects, it's always empty here. */ DUK_ASSERT(thr->heap->refzero_list == NULL); #endif /* If not present in finalize_list (or refzero_list), it * must be either in heap_allocated or the string table. */ if (DUK_HEAPHDR_IS_STRING(h)) { duk_uint32_t i; duk_hstring *str; duk_heap *heap = thr->heap; DUK_ASSERT(found == 0); for (i = 0; i < heap->st_size; i++) { #if defined(DUK_USE_STRTAB_PTRCOMP) str = DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, heap->strtable16[i]); #else str = heap->strtable[i]; #endif while (str != NULL) { if (str == (duk_hstring *) h) { DUK_ASSERT(found == 0); /* Would indicate corrupted lists. */ found = 1; break; } str = str->hdr.h_next; } } DUK_ASSERT(found != 0); } else { for (curr = thr->heap->heap_allocated; curr != NULL; curr = DUK_HEAPHDR_GET_NEXT(thr->heap, curr)) { if (curr == h) { DUK_ASSERT(found == 0); /* Would indicate corrupted lists. */ found = 1; } } DUK_ASSERT(found != 0); } } #endif /* DUK_USE_ASSERTIONS */ DUK_EXTERNAL duk_idx_t duk_push_heapptr(duk_hthread *thr, void *ptr) { duk_idx_t ret; duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); /* Reviving an object using a heap pointer is a dangerous API * operation: if the application doesn't guarantee that the * pointer target is always reachable, difficult-to-diagnose * problems may ensue. Try to validate the 'ptr' argument to * the extent possible. */ #if defined(DUK_USE_ASSERTIONS) duk__validate_push_heapptr(thr, ptr); #endif DUK__CHECK_SPACE(); ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom); tv = thr->valstack_top++; if (ptr == NULL) { DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv)); return ret; } DUK_HEAPHDR_ASSERT_VALID((duk_heaphdr *) ptr); /* If the argument is on finalize_list it has technically been * unreachable before duk_push_heapptr() but it's still safe to * push it. Starting from Duktape 2.1 allow application code to * do so. There are two main cases: * * (1) The object is on the finalize_list and we're called by * the finalizer for the object being finalized. In this * case do nothing: finalize_list handling will deal with * the object queueing. This is detected by the object not * having a FINALIZABLE flag despite being on the finalize_list; * the flag is cleared for the object being finalized only. * * (2) The object is on the finalize_list but is not currently * being processed. In this case the object can be queued * back to heap_allocated with a few flags cleared, in effect * cancelling the finalizer. */ if (DUK_UNLIKELY(DUK_HEAPHDR_HAS_FINALIZABLE((duk_heaphdr *) ptr))) { duk_heaphdr *curr; DUK_D(DUK_DPRINT("duk_push_heapptr() with a pointer on finalize_list, autorescue")); curr = (duk_heaphdr *) ptr; DUK_HEAPHDR_CLEAR_FINALIZABLE(curr); /* Because FINALIZED is set prior to finalizer call, it will * be set for the object being currently finalized, but not * for other objects on finalize_list. */ DUK_HEAPHDR_CLEAR_FINALIZED(curr); /* Dequeue object from finalize_list and queue it back to * heap_allocated. */ #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(curr) >= 1); /* Preincremented on finalize_list insert. */ DUK_HEAPHDR_PREDEC_REFCOUNT(curr); #endif DUK_HEAP_REMOVE_FROM_FINALIZE_LIST(thr->heap, curr); DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(thr->heap, curr); /* Continue with the rest. */ } switch (DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) ptr)) { case DUK_HTYPE_STRING: DUK_TVAL_SET_STRING(tv, (duk_hstring *) ptr); break; case DUK_HTYPE_OBJECT: DUK_TVAL_SET_OBJECT(tv, (duk_hobject *) ptr); break; default: DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) ptr) == DUK_HTYPE_BUFFER); DUK_TVAL_SET_BUFFER(tv, (duk_hbuffer *) ptr); break; } DUK_HEAPHDR_INCREF(thr, (duk_heaphdr *) ptr); return ret; } /* Push object with no prototype, i.e. a "bare" object. */ DUK_EXTERNAL duk_idx_t duk_push_bare_object(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); (void) duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT), -1); /* no prototype */ return duk_get_top_index_unsafe(thr); } DUK_INTERNAL void duk_push_hstring(duk_hthread *thr, duk_hstring *h) { duk_tval tv; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(h != NULL); DUK_TVAL_SET_STRING(&tv, h); duk_push_tval(thr, &tv); } DUK_INTERNAL void duk_push_hstring_stridx(duk_hthread *thr, duk_small_uint_t stridx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT_STRIDX_VALID(stridx); duk_push_hstring(thr, DUK_HTHREAD_GET_STRING(thr, stridx)); } DUK_INTERNAL void duk_push_hstring_empty(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_push_hstring(thr, DUK_HTHREAD_GET_STRING(thr, DUK_STRIDX_EMPTY_STRING)); } DUK_INTERNAL void duk_push_hobject(duk_hthread *thr, duk_hobject *h) { duk_tval tv; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(h != NULL); DUK_TVAL_SET_OBJECT(&tv, h); duk_push_tval(thr, &tv); } DUK_INTERNAL void duk_push_hbuffer(duk_hthread *thr, duk_hbuffer *h) { duk_tval tv; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(h != NULL); DUK_TVAL_SET_BUFFER(&tv, h); duk_push_tval(thr, &tv); } DUK_INTERNAL void duk_push_hobject_bidx(duk_hthread *thr, duk_small_int_t builtin_idx) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(builtin_idx >= 0 && builtin_idx < DUK_NUM_BUILTINS); DUK_ASSERT(thr->builtins[builtin_idx] != NULL); duk_push_hobject(thr, thr->builtins[builtin_idx]); } /* * Poppers */ DUK_LOCAL DUK_ALWAYS_INLINE void duk__pop_n_unsafe_raw(duk_hthread *thr, duk_idx_t count) { duk_tval *tv; #if defined(DUK_USE_REFERENCE_COUNTING) duk_tval *tv_end; #endif DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(count >= 0); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack_bottom) >= (duk_size_t) count); #if defined(DUK_USE_REFERENCE_COUNTING) tv = thr->valstack_top; tv_end = tv - count; while (tv != tv_end) { tv--; DUK_ASSERT(tv >= thr->valstack_bottom); DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ(thr, tv); } thr->valstack_top = tv; DUK_REFZERO_CHECK_FAST(thr); #else tv = thr->valstack_top; while (count > 0) { count--; tv--; DUK_ASSERT(tv >= thr->valstack_bottom); DUK_TVAL_SET_UNDEFINED(tv); } thr->valstack_top = tv; #endif DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); } DUK_EXTERNAL void duk_pop_n(duk_hthread *thr, duk_idx_t count) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); if (DUK_UNLIKELY((duk_uidx_t) (thr->valstack_top - thr->valstack_bottom) < (duk_uidx_t) count)) { DUK_ERROR_RANGE_INVALID_COUNT(thr); DUK_WO_NORETURN(return;); } DUK_ASSERT(count >= 0); duk__pop_n_unsafe_raw(thr, count); } #if defined(DUK_USE_PREFER_SIZE) DUK_INTERNAL void duk_pop_n_unsafe(duk_hthread *thr, duk_idx_t count) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n(thr, count); } #else /* DUK_USE_PREFER_SIZE */ DUK_INTERNAL void duk_pop_n_unsafe(duk_hthread *thr, duk_idx_t count) { DUK_ASSERT_API_ENTRY(thr); duk__pop_n_unsafe_raw(thr, count); } #endif /* DUK_USE_PREFER_SIZE */ /* Pop N elements without DECREF (in effect "stealing" any actual refcounts). */ #if defined(DUK_USE_REFERENCE_COUNTING) DUK_INTERNAL void duk_pop_n_nodecref_unsafe(duk_hthread *thr, duk_idx_t count) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(count >= 0); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack_bottom) >= (duk_size_t) count); tv = thr->valstack_top; while (count > 0) { count--; tv--; DUK_ASSERT(tv >= thr->valstack_bottom); DUK_TVAL_SET_UNDEFINED(tv); } thr->valstack_top = tv; DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); } #else /* DUK_USE_REFERENCE_COUNTING */ DUK_INTERNAL void duk_pop_n_nodecref_unsafe(duk_hthread *thr, duk_idx_t count) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n_unsafe(thr, count); } #endif /* DUK_USE_REFERENCE_COUNTING */ /* Popping one element is called so often that when footprint is not an issue, * compile a specialized function for it. */ #if defined(DUK_USE_PREFER_SIZE) DUK_EXTERNAL void duk_pop(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n(thr, 1); } DUK_INTERNAL void duk_pop_unsafe(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n_unsafe(thr, 1); } DUK_INTERNAL void duk_pop_nodecref_unsafe(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n_nodecref_unsafe(thr, 1); } #else /* DUK_USE_PREFER_SIZE */ DUK_LOCAL DUK_ALWAYS_INLINE void duk__pop_unsafe_raw(duk_hthread *thr) { duk_tval *tv; DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(thr->valstack_top != thr->valstack_bottom); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack_bottom) >= (duk_size_t) 1); tv = --thr->valstack_top; DUK_ASSERT(tv >= thr->valstack_bottom); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); /* side effects */ #else DUK_TVAL_SET_UNDEFINED(tv); #endif DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); } DUK_EXTERNAL void duk_pop(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); if (DUK_UNLIKELY(thr->valstack_top == thr->valstack_bottom)) { DUK_ERROR_RANGE_INVALID_COUNT(thr); DUK_WO_NORETURN(return;); } duk__pop_unsafe_raw(thr); } DUK_INTERNAL void duk_pop_unsafe(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk__pop_unsafe_raw(thr); } DUK_INTERNAL void duk_pop_nodecref_unsafe(duk_hthread *thr) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->valstack_top != thr->valstack_bottom); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack_bottom) >= (duk_size_t) 1); tv = --thr->valstack_top; DUK_ASSERT(tv >= thr->valstack_bottom); DUK_TVAL_SET_UNDEFINED(tv); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); } #endif /* !DUK_USE_PREFER_SIZE */ #if defined(DUK_USE_PREFER_SIZE) DUK_INTERNAL void duk_pop_undefined(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_nodecref_unsafe(thr); } #else /* DUK_USE_PREFER_SIZE */ DUK_INTERNAL void duk_pop_undefined(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->valstack_top != thr->valstack_bottom); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack_bottom) >= (duk_size_t) 1); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top - 1)); thr->valstack_top--; DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); } #endif /* !DUK_USE_PREFER_SIZE */ #if defined(DUK_USE_PREFER_SIZE) DUK_EXTERNAL void duk_pop_2(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n(thr, 2); } DUK_INTERNAL void duk_pop_2_unsafe(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n_unsafe(thr, 2); } DUK_INTERNAL void duk_pop_2_nodecref_unsafe(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n_nodecref_unsafe(thr, 2); } #else DUK_LOCAL DUK_ALWAYS_INLINE void duk__pop_2_unsafe_raw(duk_hthread *thr) { duk_tval *tv; DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(thr->valstack_top != thr->valstack_bottom); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack_bottom) >= (duk_size_t) 2); tv = --thr->valstack_top; DUK_ASSERT(tv >= thr->valstack_bottom); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); /* side effects */ #else DUK_TVAL_SET_UNDEFINED(tv); #endif tv = --thr->valstack_top; DUK_ASSERT(tv >= thr->valstack_bottom); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); /* side effects */ #else DUK_TVAL_SET_UNDEFINED(tv); #endif DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); } DUK_EXTERNAL void duk_pop_2(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); if (DUK_UNLIKELY(thr->valstack_top - 2 < thr->valstack_bottom)) { DUK_ERROR_RANGE_INVALID_COUNT(thr); DUK_WO_NORETURN(return;); } duk__pop_2_unsafe_raw(thr); } DUK_INTERNAL void duk_pop_2_unsafe(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk__pop_2_unsafe_raw(thr); } DUK_INTERNAL void duk_pop_2_nodecref_unsafe(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->valstack_top != thr->valstack_bottom); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack_bottom) >= (duk_size_t) 2); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top - 1)); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top - 2)); thr->valstack_top -= 2; DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); } #endif /* !DUK_USE_PREFER_SIZE */ DUK_EXTERNAL void duk_pop_3(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n(thr, 3); } DUK_INTERNAL void duk_pop_3_unsafe(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n_unsafe(thr, 3); } DUK_INTERNAL void duk_pop_3_nodecref_unsafe(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_pop_n_nodecref_unsafe(thr, 3); } /* * Pack and unpack (pack value stack entries into an array and vice versa) */ /* XXX: pack index range? array index offset? */ /* XXX: need ability to pack into a bare array? */ DUK_INTERNAL void duk_pack(duk_hthread *thr, duk_idx_t count) { duk_tval *tv_src; duk_tval *tv_dst; duk_tval *tv_curr; duk_tval *tv_limit; duk_idx_t top; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); top = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom); DUK_ASSERT(top >= 0); if (DUK_UNLIKELY((duk_uidx_t) count > (duk_uidx_t) top)) { /* Also handles negative count. */ DUK_ERROR_RANGE_INVALID_COUNT(thr); DUK_WO_NORETURN(return;); } DUK_ASSERT(count >= 0); /* Wrapping is controlled by the check above: value stack top can be * at most DUK_USE_VALSTACK_LIMIT which is low enough so that * multiplying with sizeof(duk_tval) won't wrap. */ DUK_ASSERT(count >= 0 && count <= (duk_idx_t) DUK_USE_VALSTACK_LIMIT); DUK_ASSERT((duk_size_t) count <= DUK_SIZE_MAX / sizeof(duk_tval)); /* no wrapping */ tv_dst = duk_push_harray_with_size_outptr(thr, (duk_uint32_t) count); /* XXX: uninitialized would be OK */ DUK_ASSERT(count == 0 || tv_dst != NULL); DUK_ASSERT(!duk_is_bare_object(thr, -1)); /* Copy value stack values directly to the array part without * any refcount updates: net refcount changes are zero. */ tv_src = thr->valstack_top - count - 1; duk_memcpy_unsafe((void *) tv_dst, (const void *) tv_src, (size_t) count * sizeof(duk_tval)); /* Overwrite result array to final value stack location and wipe * the rest; no refcount operations needed. */ tv_dst = tv_src; /* when count == 0, same as tv_src (OK) */ tv_src = thr->valstack_top - 1; DUK_TVAL_SET_TVAL(tv_dst, tv_src); /* XXX: internal helper to wipe a value stack segment? */ tv_curr = tv_dst + 1; tv_limit = thr->valstack_top; while (tv_curr != tv_limit) { /* Wipe policy: keep as 'undefined'. */ DUK_TVAL_SET_UNDEFINED(tv_curr); tv_curr++; } thr->valstack_top = tv_dst + 1; } DUK_INTERNAL duk_idx_t duk_unpack_array_like(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); tv = duk_require_tval(thr, idx); if (DUK_LIKELY(DUK_TVAL_IS_OBJECT(tv))) { duk_hobject *h; duk_uint32_t len; duk_uint32_t i; h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); DUK_UNREF(h); #if defined(DUK_USE_ARRAY_FASTPATH) /* close enough */ if (DUK_LIKELY(DUK_HOBJECT_IS_ARRAY(h) && ((duk_harray *) h)->length <= DUK_HOBJECT_GET_ASIZE(h))) { duk_harray *h_arr; duk_tval *tv_src; duk_tval *tv_dst; h_arr = (duk_harray *) h; len = h_arr->length; if (DUK_UNLIKELY(len >= 0x80000000UL)) { goto fail_over_2g; } duk_require_stack(thr, (duk_idx_t) len); /* The potential allocation in duk_require_stack() may * run a finalizer which modifies the argArray so that * e.g. becomes sparse. So, we need to recheck that the * array didn't change size and that there's still a * valid backing array part. * * XXX: alternatively, could prevent finalizers for the * duration. */ if (DUK_UNLIKELY(len != h_arr->length || h_arr->length > DUK_HOBJECT_GET_ASIZE((duk_hobject *) h_arr))) { goto skip_fast; } /* Main fast path: arguments array is almost always * an actual array (though it might also be an arguments * object). */ DUK_DDD(DUK_DDDPRINT("fast path for %ld elements", (long) h_arr->length)); tv_src = DUK_HOBJECT_A_GET_BASE(thr->heap, h); tv_dst = thr->valstack_top; while (len-- > 0) { DUK_ASSERT(tv_dst < thr->valstack_end); if (DUK_UNLIKELY(DUK_TVAL_IS_UNUSED(tv_src))) { /* Gaps are very unlikely. Skip over them, * without an ancestor lookup (technically * not compliant). */ DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv_dst)); /* valstack policy */ } else { DUK_TVAL_SET_TVAL(tv_dst, tv_src); DUK_TVAL_INCREF(thr, tv_dst); } tv_src++; tv_dst++; } DUK_ASSERT(tv_dst <= thr->valstack_end); thr->valstack_top = tv_dst; return (duk_idx_t) h_arr->length; } skip_fast: #endif /* DUK_USE_ARRAY_FASTPATH */ /* Slow path: actual lookups. The initial 'length' lookup * decides the output length, regardless of side effects that * may resize or change the argArray while we read the * indices. */ idx = duk_normalize_index(thr, idx); duk_get_prop_stridx(thr, idx, DUK_STRIDX_LENGTH); len = duk_to_uint32(thr, -1); /* ToUint32() coercion required */ if (DUK_UNLIKELY(len >= 0x80000000UL)) { goto fail_over_2g; } duk_pop_unsafe(thr); DUK_DDD(DUK_DDDPRINT("slow path for %ld elements", (long) len)); duk_require_stack(thr, (duk_idx_t) len); for (i = 0; i < len; i++) { duk_get_prop_index(thr, idx, (duk_uarridx_t) i); } return (duk_idx_t) len; } else if (DUK_TVAL_IS_UNDEFINED(tv) || DUK_TVAL_IS_NULL(tv)) { return 0; } DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return 0;); fail_over_2g: DUK_ERROR_RANGE_INVALID_LENGTH(thr); DUK_WO_NORETURN(return 0;); } /* * Error throwing */ DUK_EXTERNAL void duk_throw_raw(duk_hthread *thr) { duk_tval *tv_val; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr->valstack_bottom >= thr->valstack); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT(thr->valstack_end >= thr->valstack_top); if (DUK_UNLIKELY(thr->valstack_top == thr->valstack_bottom)) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return;); } /* Errors are augmented when they are created, not when they are * thrown or re-thrown. The current error handler, however, runs * just before an error is thrown. */ /* Sync so that augmentation sees up-to-date activations, NULL * thr->ptr_curr_pc so that it's not used if side effects occur * in augmentation or longjmp handling. */ duk_hthread_sync_and_null_currpc(thr); #if defined(DUK_USE_AUGMENT_ERROR_THROW) DUK_DDD(DUK_DDDPRINT("THROW ERROR (API): %!dT (before throw augment)", (duk_tval *) duk_get_tval(thr, -1))); duk_err_augment_error_throw(thr); #endif DUK_DDD(DUK_DDDPRINT("THROW ERROR (API): %!dT (after throw augment)", (duk_tval *) duk_get_tval(thr, -1))); tv_val = DUK_GET_TVAL_NEGIDX(thr, -1); duk_err_setup_ljstate1(thr, DUK_LJ_TYPE_THROW, tv_val); #if defined(DUK_USE_DEBUGGER_SUPPORT) duk_err_check_debugger_integration(thr); #endif /* thr->heap->lj.jmpbuf_ptr is checked by duk_err_longjmp() so we don't * need to check that here. If the value is NULL, a fatal error occurs * because we can't return. */ duk_err_longjmp(thr); DUK_UNREACHABLE(); } DUK_EXTERNAL void duk_fatal_raw(duk_hthread *thr, const char *err_msg) { DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(thr->heap->fatal_func != NULL); DUK_D(DUK_DPRINT("fatal error occurred: %s", err_msg ? err_msg : "NULL")); /* fatal_func should be noreturn, but noreturn declarations on function * pointers has a very spotty support apparently so it's not currently * done. */ thr->heap->fatal_func(thr->heap->heap_udata, err_msg); /* If the fatal handler returns, all bets are off. It'd be nice to * print something here but since we don't want to depend on stdio, * there's no way to do so portably. */ DUK_D(DUK_DPRINT("fatal error handler returned, all bets are off!")); for (;;) { /* loop forever, don't return (function marked noreturn) */ } } DUK_EXTERNAL void duk_error_va_raw(duk_hthread *thr, duk_errcode_t err_code, const char *filename, duk_int_t line, const char *fmt, va_list ap) { DUK_ASSERT_API_ENTRY(thr); duk_push_error_object_va_raw(thr, err_code, filename, line, fmt, ap); (void) duk_throw(thr); DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_error_raw(duk_hthread *thr, duk_errcode_t err_code, const char *filename, duk_int_t line, const char *fmt, ...) { va_list ap; DUK_ASSERT_API_ENTRY(thr); va_start(ap, fmt); duk_push_error_object_va_raw(thr, err_code, filename, line, fmt, ap); va_end(ap); (void) duk_throw(thr); DUK_WO_NORETURN(return;); } #if !defined(DUK_USE_VARIADIC_MACROS) DUK_NORETURN(DUK_LOCAL_DECL void duk__throw_error_from_stash(duk_hthread *thr, duk_errcode_t err_code, const char *fmt, va_list ap)); DUK_LOCAL void duk__throw_error_from_stash(duk_hthread *thr, duk_errcode_t err_code, const char *fmt, va_list ap) { const char *filename; duk_int_t line; DUK_CTX_ASSERT_VALID(thr); filename = duk_api_global_filename; line = duk_api_global_line; duk_api_global_filename = NULL; duk_api_global_line = 0; duk_push_error_object_va_raw(thr, err_code, filename, line, fmt, ap); (void) duk_throw(thr); DUK_WO_NORETURN(return;); } #define DUK__ERROR_STASH_SHARED(code) do { \ va_list ap; \ va_start(ap, fmt); \ duk__throw_error_from_stash(thr, (code), fmt, ap); \ va_end(ap); \ DUK_WO_NORETURN(return 0;); \ } while (0) DUK_EXTERNAL duk_ret_t duk_error_stash(duk_hthread *thr, duk_errcode_t err_code, const char *fmt, ...) { DUK_ASSERT_API_ENTRY(thr); DUK__ERROR_STASH_SHARED(err_code); } DUK_EXTERNAL duk_ret_t duk_generic_error_stash(duk_hthread *thr, const char *fmt, ...) { DUK_ASSERT_API_ENTRY(thr); DUK__ERROR_STASH_SHARED(DUK_ERR_ERROR); } DUK_EXTERNAL duk_ret_t duk_eval_error_stash(duk_hthread *thr, const char *fmt, ...) { DUK_ASSERT_API_ENTRY(thr); DUK__ERROR_STASH_SHARED(DUK_ERR_EVAL_ERROR); } DUK_EXTERNAL duk_ret_t duk_range_error_stash(duk_hthread *thr, const char *fmt, ...) { DUK_ASSERT_API_ENTRY(thr); DUK__ERROR_STASH_SHARED(DUK_ERR_RANGE_ERROR); } DUK_EXTERNAL duk_ret_t duk_reference_error_stash(duk_hthread *thr, const char *fmt, ...) { DUK_ASSERT_API_ENTRY(thr); DUK__ERROR_STASH_SHARED(DUK_ERR_REFERENCE_ERROR); } DUK_EXTERNAL duk_ret_t duk_syntax_error_stash(duk_hthread *thr, const char *fmt, ...) { DUK_ASSERT_API_ENTRY(thr); DUK__ERROR_STASH_SHARED(DUK_ERR_SYNTAX_ERROR); } DUK_EXTERNAL duk_ret_t duk_type_error_stash(duk_hthread *thr, const char *fmt, ...) { DUK_ASSERT_API_ENTRY(thr); DUK__ERROR_STASH_SHARED(DUK_ERR_TYPE_ERROR); } DUK_EXTERNAL duk_ret_t duk_uri_error_stash(duk_hthread *thr, const char *fmt, ...) { DUK_ASSERT_API_ENTRY(thr); DUK__ERROR_STASH_SHARED(DUK_ERR_URI_ERROR); } #endif /* DUK_USE_VARIADIC_MACROS */ /* * Comparison */ DUK_EXTERNAL duk_bool_t duk_equals(duk_hthread *thr, duk_idx_t idx1, duk_idx_t idx2) { duk_tval *tv1, *tv2; DUK_ASSERT_API_ENTRY(thr); tv1 = duk_get_tval(thr, idx1); tv2 = duk_get_tval(thr, idx2); if ((tv1 == NULL) || (tv2 == NULL)) { return 0; } /* Coercion may be needed, the helper handles that by pushing the * tagged values to the stack. */ return duk_js_equals(thr, tv1, tv2); } DUK_EXTERNAL duk_bool_t duk_strict_equals(duk_hthread *thr, duk_idx_t idx1, duk_idx_t idx2) { duk_tval *tv1, *tv2; DUK_ASSERT_API_ENTRY(thr); tv1 = duk_get_tval(thr, idx1); tv2 = duk_get_tval(thr, idx2); if ((tv1 == NULL) || (tv2 == NULL)) { return 0; } /* No coercions or other side effects, so safe */ return duk_js_strict_equals(tv1, tv2); } DUK_EXTERNAL duk_bool_t duk_samevalue(duk_hthread *thr, duk_idx_t idx1, duk_idx_t idx2) { duk_tval *tv1, *tv2; DUK_ASSERT_API_ENTRY(thr); tv1 = duk_get_tval(thr, idx1); tv2 = duk_get_tval(thr, idx2); if ((tv1 == NULL) || (tv2 == NULL)) { return 0; } /* No coercions or other side effects, so safe */ return duk_js_samevalue(tv1, tv2); } /* * instanceof */ DUK_EXTERNAL duk_bool_t duk_instanceof(duk_hthread *thr, duk_idx_t idx1, duk_idx_t idx2) { duk_tval *tv1, *tv2; DUK_ASSERT_API_ENTRY(thr); /* Index validation is strict, which differs from duk_equals(). * The strict behavior mimics how instanceof itself works, e.g. * it is a TypeError if rval is not a -callable- object. It would * be somewhat inconsistent if rval would be allowed to be * non-existent without a TypeError. */ tv1 = duk_require_tval(thr, idx1); DUK_ASSERT(tv1 != NULL); tv2 = duk_require_tval(thr, idx2); DUK_ASSERT(tv2 != NULL); return duk_js_instanceof(thr, tv1, tv2); } /* * Lightfunc */ DUK_INTERNAL void duk_push_lightfunc_name_raw(duk_hthread *thr, duk_c_function func, duk_small_uint_t lf_flags) { /* Lightfunc name, includes Duktape/C native function pointer, which * can often be used to locate the function from a symbol table. * The name also includes the 16-bit duk_tval flags field because it * includes the magic value. Because a single native function often * provides different functionality depending on the magic value, it * seems reasonably to include it in the name. * * On the other hand, a complicated name increases string table * pressure in low memory environments (but only when function name * is accessed). */ DUK_ASSERT_API_ENTRY(thr); duk_push_literal(thr, "light_"); duk_push_string_funcptr(thr, (duk_uint8_t *) &func, sizeof(func)); duk_push_sprintf(thr, "_%04x", (unsigned int) lf_flags); duk_concat(thr, 3); } DUK_INTERNAL void duk_push_lightfunc_name(duk_hthread *thr, duk_tval *tv) { duk_c_function func; duk_small_uint_t lf_flags; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv)); DUK_TVAL_GET_LIGHTFUNC(tv, func, lf_flags); duk_push_lightfunc_name_raw(thr, func, lf_flags); } DUK_INTERNAL void duk_push_lightfunc_tostring(duk_hthread *thr, duk_tval *tv) { duk_c_function func; duk_small_uint_t lf_flags; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv)); DUK_TVAL_GET_LIGHTFUNC(tv, func, lf_flags); /* read before 'tv' potentially invalidated */ duk_push_literal(thr, "function "); duk_push_lightfunc_name_raw(thr, func, lf_flags); duk_push_literal(thr, "() { [lightfunc code] }"); duk_concat(thr, 3); } /* * Function pointers * * Printing function pointers is non-portable, so we do that by hex printing * bytes from memory. */ DUK_INTERNAL void duk_push_string_funcptr(duk_hthread *thr, duk_uint8_t *ptr, duk_size_t sz) { duk_uint8_t buf[32 * 2]; duk_uint8_t *p, *q; duk_small_uint_t i; duk_small_uint_t t; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(sz <= 32); /* sanity limit for function pointer size */ p = buf; #if defined(DUK_USE_INTEGER_LE) q = ptr + sz; #else q = ptr; #endif for (i = 0; i < sz; i++) { #if defined(DUK_USE_INTEGER_LE) t = *(--q); #else t = *(q++); #endif *p++ = duk_lc_digits[t >> 4]; *p++ = duk_lc_digits[t & 0x0f]; } duk_push_lstring(thr, (const char *) buf, sz * 2); } /* * Push readable string summarizing duk_tval. The operation is side effect * free and will only throw from internal errors (e.g. out of memory). * This is used by e.g. property access code to summarize a key/base safely, * and is not intended to be fast (but small and safe). */ /* String limits for summary strings. */ #define DUK__READABLE_SUMMARY_MAXCHARS 96 /* maximum supported by helper */ #define DUK__READABLE_STRING_MAXCHARS 32 /* for strings/symbols */ #define DUK__READABLE_ERRMSG_MAXCHARS 96 /* for error messages */ /* String sanitizer which escapes ASCII control characters and a few other * ASCII characters, passes Unicode as is, and replaces invalid UTF-8 with * question marks. No errors are thrown for any input string, except in out * of memory situations. */ DUK_LOCAL void duk__push_hstring_readable_unicode(duk_hthread *thr, duk_hstring *h_input, duk_small_uint_t maxchars) { const duk_uint8_t *p, *p_start, *p_end; duk_uint8_t buf[DUK_UNICODE_MAX_XUTF8_LENGTH * DUK__READABLE_SUMMARY_MAXCHARS + 2 /*quotes*/ + 3 /*periods*/]; duk_uint8_t *q; duk_ucodepoint_t cp; duk_small_uint_t nchars; DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(h_input != NULL); DUK_ASSERT(maxchars <= DUK__READABLE_SUMMARY_MAXCHARS); p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input); p = p_start; q = buf; nchars = 0; *q++ = (duk_uint8_t) DUK_ASC_SINGLEQUOTE; for (;;) { if (p >= p_end) { break; } if (nchars == maxchars) { *q++ = (duk_uint8_t) DUK_ASC_PERIOD; *q++ = (duk_uint8_t) DUK_ASC_PERIOD; *q++ = (duk_uint8_t) DUK_ASC_PERIOD; break; } if (duk_unicode_decode_xutf8(thr, &p, p_start, p_end, &cp)) { if (cp < 0x20 || cp == 0x7f || cp == DUK_ASC_SINGLEQUOTE || cp == DUK_ASC_BACKSLASH) { DUK_ASSERT(DUK_UNICODE_MAX_XUTF8_LENGTH >= 4); /* estimate is valid */ DUK_ASSERT((cp >> 4) <= 0x0f); *q++ = (duk_uint8_t) DUK_ASC_BACKSLASH; *q++ = (duk_uint8_t) DUK_ASC_LC_X; *q++ = (duk_uint8_t) duk_lc_digits[cp >> 4]; *q++ = (duk_uint8_t) duk_lc_digits[cp & 0x0f]; } else { q += duk_unicode_encode_xutf8(cp, q); } } else { p++; /* advance manually */ *q++ = (duk_uint8_t) DUK_ASC_QUESTION; } nchars++; } *q++ = (duk_uint8_t) DUK_ASC_SINGLEQUOTE; duk_push_lstring(thr, (const char *) buf, (duk_size_t) (q - buf)); } DUK_LOCAL const char *duk__push_string_tval_readable(duk_hthread *thr, duk_tval *tv, duk_bool_t error_aware) { DUK_CTX_ASSERT_VALID(thr); /* 'tv' may be NULL */ if (tv == NULL) { duk_push_literal(thr, "none"); } else { switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_STRING: { duk_hstring *h = DUK_TVAL_GET_STRING(tv); if (DUK_HSTRING_HAS_SYMBOL(h)) { /* XXX: string summary produces question marks * so this is not very ideal. */ duk_push_literal(thr, "[Symbol "); duk_push_string(thr, duk__get_symbol_type_string(h)); duk_push_literal(thr, " "); duk__push_hstring_readable_unicode(thr, h, DUK__READABLE_STRING_MAXCHARS); duk_push_literal(thr, "]"); duk_concat(thr, 5); break; } duk__push_hstring_readable_unicode(thr, h, DUK__READABLE_STRING_MAXCHARS); break; } case DUK_TAG_OBJECT: { duk_hobject *h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (error_aware && duk_hobject_prototype_chain_contains(thr, h, thr->builtins[DUK_BIDX_ERROR_PROTOTYPE], 1 /*ignore_loop*/)) { /* Get error message in a side effect free way if * possible; if not, summarize as a generic object. * Error message currently gets quoted. */ /* XXX: better internal getprop call; get without side effects * but traverse inheritance chain. */ duk_tval *tv_msg; tv_msg = duk_hobject_find_entry_tval_ptr_stridx(thr->heap, h, DUK_STRIDX_MESSAGE); if (tv_msg != NULL && DUK_TVAL_IS_STRING(tv_msg)) { /* It's critical to avoid recursion so * only summarize a string .message. */ duk__push_hstring_readable_unicode(thr, DUK_TVAL_GET_STRING(tv_msg), DUK__READABLE_ERRMSG_MAXCHARS); break; } } duk_push_class_string_tval(thr, tv, 1 /*avoid_side_effects*/); break; } case DUK_TAG_BUFFER: { /* While plain buffers mimic Uint8Arrays, they summarize differently. * This is useful so that the summarized string accurately reflects the * internal type which may matter for figuring out bugs etc. */ /* XXX: Hex encoded, length limited buffer summary here? */ duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h != NULL); duk_push_sprintf(thr, "[buffer:%ld]", (long) DUK_HBUFFER_GET_SIZE(h)); break; } case DUK_TAG_POINTER: { /* Surround with parentheses like in JX, ensures NULL pointer * is distinguishable from null value ("(null)" vs "null"). */ duk_push_tval(thr, tv); duk_push_sprintf(thr, "(%s)", duk_to_string(thr, -1)); duk_remove_m2(thr); break; } default: { duk_push_tval(thr, tv); break; } } } return duk_to_string(thr, -1); } DUK_INTERNAL const char *duk_push_string_tval_readable(duk_hthread *thr, duk_tval *tv) { DUK_ASSERT_API_ENTRY(thr); return duk__push_string_tval_readable(thr, tv, 0 /*error_aware*/); } DUK_INTERNAL const char *duk_push_string_readable(duk_hthread *thr, duk_idx_t idx) { DUK_ASSERT_API_ENTRY(thr); return duk_push_string_tval_readable(thr, duk_get_tval(thr, idx)); } DUK_INTERNAL const char *duk_push_string_tval_readable_error(duk_hthread *thr, duk_tval *tv) { DUK_ASSERT_API_ENTRY(thr); return duk__push_string_tval_readable(thr, tv, 1 /*error_aware*/); } DUK_INTERNAL void duk_push_symbol_descriptive_string(duk_hthread *thr, duk_hstring *h) { const duk_uint8_t *p; const duk_uint8_t *p_end; const duk_uint8_t *q; DUK_ASSERT_API_ENTRY(thr); /* .toString() */ duk_push_literal(thr, "Symbol("); p = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h); p_end = p + DUK_HSTRING_GET_BYTELEN(h); DUK_ASSERT(p[0] == 0xff || (p[0] & 0xc0) == 0x80); p++; for (q = p; q < p_end; q++) { if (*q == 0xffU) { /* Terminate either at end-of-string (but NUL MUST * be accepted without terminating description) or * 0xFF, which is used to mark start of unique trailer * (and cannot occur in CESU-8 / extended UTF-8). */ break; } } duk_push_lstring(thr, (const char *) p, (duk_size_t) (q - p)); duk_push_literal(thr, ")"); duk_concat(thr, 3); } /* * Functions */ #if 0 /* not used yet */ DUK_INTERNAL void duk_push_hnatfunc_name(duk_hthread *thr, duk_hnatfunc *h) { duk_c_function func; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HOBJECT_IS_NATFUNC((duk_hobject *) h)); duk_push_sprintf(thr, "native_"); func = h->func; duk_push_string_funcptr(thr, (duk_uint8_t *) &func, sizeof(func)); duk_push_sprintf(thr, "_%04x_%04x", (unsigned int) (duk_uint16_t) h->nargs, (unsigned int) (duk_uint16_t) h->magic); duk_concat(thr, 3); } #endif /* * duk_tval slice copy */ DUK_INTERNAL void duk_copy_tvals_incref(duk_hthread *thr, duk_tval *tv_dst, duk_tval *tv_src, duk_size_t count) { duk_tval *tv; DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(thr); DUK_ASSERT(count * sizeof(duk_tval) >= count); /* no wrap */ duk_memcpy_unsafe((void *) tv_dst, (const void *) tv_src, count * sizeof(duk_tval)); tv = tv_dst; while (count-- > 0) { DUK_TVAL_INCREF(thr, tv); tv++; } } /* automatic undefs */ #undef DUK__ASSERT_SPACE #undef DUK__CHECK_SPACE #undef DUK__ERROR_STASH_SHARED #undef DUK__PACK_ARGS #undef DUK__READABLE_ERRMSG_MAXCHARS #undef DUK__READABLE_STRING_MAXCHARS #undef DUK__READABLE_SUMMARY_MAXCHARS /* * String manipulation */ /* #include duk_internal.h -> already included */ DUK_LOCAL void duk__concat_and_join_helper(duk_hthread *thr, duk_idx_t count_in, duk_bool_t is_join) { duk_uint_t count; duk_uint_t i; duk_size_t idx; duk_size_t len; duk_hstring *h; duk_uint8_t *buf; DUK_CTX_ASSERT_VALID(thr); if (DUK_UNLIKELY(count_in <= 0)) { if (count_in < 0) { DUK_ERROR_RANGE_INVALID_COUNT(thr); DUK_WO_NORETURN(return;); } DUK_ASSERT(count_in == 0); duk_push_hstring_empty(thr); return; } count = (duk_uint_t) count_in; if (is_join) { duk_size_t t1, t2, limit; h = duk_to_hstring(thr, -((duk_idx_t) count) - 1); DUK_ASSERT(h != NULL); /* A bit tricky overflow test, see doc/code-issues.rst. */ t1 = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h); t2 = (duk_size_t) (count - 1); limit = (duk_size_t) DUK_HSTRING_MAX_BYTELEN; if (DUK_UNLIKELY(t2 != 0 && t1 > limit / t2)) { /* Combined size of separators already overflows. */ goto error_overflow; } len = (duk_size_t) (t1 * t2); } else { len = (duk_size_t) 0; } for (i = count; i >= 1; i--) { duk_size_t new_len; h = duk_to_hstring(thr, -((duk_idx_t) i)); new_len = len + (duk_size_t) DUK_HSTRING_GET_BYTELEN(h); /* Impose a string maximum length, need to handle overflow * correctly. */ if (new_len < len || /* wrapped */ new_len > (duk_size_t) DUK_HSTRING_MAX_BYTELEN) { goto error_overflow; } len = new_len; } DUK_DDD(DUK_DDDPRINT("join/concat %lu strings, total length %lu bytes", (unsigned long) count, (unsigned long) len)); /* Use stack allocated buffer to ensure reachability in errors * (e.g. intern error). */ buf = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, len); DUK_ASSERT(buf != NULL); /* [ ... (sep) str1 str2 ... strN buf ] */ idx = 0; for (i = count; i >= 1; i--) { if (is_join && i != count) { h = duk_require_hstring(thr, -((duk_idx_t) count) - 2); /* extra -1 for buffer */ duk_memcpy(buf + idx, DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h)); idx += DUK_HSTRING_GET_BYTELEN(h); } h = duk_require_hstring(thr, -((duk_idx_t) i) - 1); /* extra -1 for buffer */ duk_memcpy(buf + idx, DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h)); idx += DUK_HSTRING_GET_BYTELEN(h); } DUK_ASSERT(idx == len); /* [ ... (sep) str1 str2 ... strN buf ] */ /* Get rid of the strings early to minimize memory use before intern. */ if (is_join) { duk_replace(thr, -((duk_idx_t) count) - 2); /* overwrite sep */ duk_pop_n(thr, (duk_idx_t) count); } else { duk_replace(thr, -((duk_idx_t) count) - 1); /* overwrite str1 */ duk_pop_n(thr, (duk_idx_t) (count - 1)); } /* [ ... buf ] */ (void) duk_buffer_to_string(thr, -1); /* Safe if inputs are safe. */ /* [ ... res ] */ return; error_overflow: DUK_ERROR_RANGE(thr, DUK_STR_RESULT_TOO_LONG); DUK_WO_NORETURN(return;); } DUK_EXTERNAL void duk_concat(duk_hthread *thr, duk_idx_t count) { DUK_ASSERT_API_ENTRY(thr); duk__concat_and_join_helper(thr, count, 0 /*is_join*/); } #if defined(DUK_USE_PREFER_SIZE) DUK_INTERNAL void duk_concat_2(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); duk_concat(thr, 2); } #else /* DUK_USE_PREFER_SIZE */ DUK_INTERNAL void duk_concat_2(duk_hthread *thr) { duk_hstring *h1; duk_hstring *h2; duk_uint8_t *buf; duk_size_t len1; duk_size_t len2; duk_size_t len; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(duk_get_top(thr) >= 2); /* Trusted caller. */ h1 = duk_to_hstring(thr, -2); h2 = duk_to_hstring(thr, -1); len1 = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h1); len2 = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h2); len = len1 + len2; if (DUK_UNLIKELY(len < len1 || /* wrapped */ len > (duk_size_t) DUK_HSTRING_MAX_BYTELEN)) { goto error_overflow; } buf = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, len); DUK_ASSERT(buf != NULL); duk_memcpy((void *) buf, (const void *) DUK_HSTRING_GET_DATA(h1), (size_t) len1); duk_memcpy((void *) (buf + len1), (const void *) DUK_HSTRING_GET_DATA(h2), (size_t) len2); (void) duk_buffer_to_string(thr, -1); /* Safe if inputs are safe. */ /* [ ... str1 str2 buf ] */ duk_replace(thr, -3); duk_pop_unsafe(thr); return; error_overflow: DUK_ERROR_RANGE(thr, DUK_STR_RESULT_TOO_LONG); DUK_WO_NORETURN(return;); } #endif /* DUK_USE_PREFER_SIZE */ DUK_EXTERNAL void duk_join(duk_hthread *thr, duk_idx_t count) { DUK_ASSERT_API_ENTRY(thr); duk__concat_and_join_helper(thr, count, 1 /*is_join*/); } /* XXX: could map/decode be unified with duk_unicode_support.c code? * Case conversion needs also the character surroundings though. */ DUK_EXTERNAL void duk_decode_string(duk_hthread *thr, duk_idx_t idx, duk_decode_char_function callback, void *udata) { duk_hstring *h_input; const duk_uint8_t *p, *p_start, *p_end; duk_codepoint_t cp; DUK_ASSERT_API_ENTRY(thr); h_input = duk_require_hstring(thr, idx); /* Accept symbols. */ DUK_ASSERT(h_input != NULL); p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input); p = p_start; for (;;) { if (p >= p_end) { break; } cp = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(thr, &p, p_start, p_end); callback(udata, cp); } } DUK_EXTERNAL void duk_map_string(duk_hthread *thr, duk_idx_t idx, duk_map_char_function callback, void *udata) { duk_hstring *h_input; duk_bufwriter_ctx bw_alloc; duk_bufwriter_ctx *bw; const duk_uint8_t *p, *p_start, *p_end; duk_codepoint_t cp; DUK_ASSERT_API_ENTRY(thr); idx = duk_normalize_index(thr, idx); h_input = duk_require_hstring(thr, idx); /* Accept symbols. */ DUK_ASSERT(h_input != NULL); bw = &bw_alloc; DUK_BW_INIT_PUSHBUF(thr, bw, DUK_HSTRING_GET_BYTELEN(h_input)); /* Reasonable output estimate. */ p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input); p = p_start; for (;;) { /* XXX: could write output in chunks with fewer ensure calls, * but relative benefit would be small here. */ if (p >= p_end) { break; } cp = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(thr, &p, p_start, p_end); cp = callback(udata, cp); DUK_BW_WRITE_ENSURE_XUTF8(thr, bw, cp); } DUK_BW_COMPACT(thr, bw); (void) duk_buffer_to_string(thr, -1); /* Safe, extended UTF-8 encoded. */ duk_replace(thr, idx); } DUK_EXTERNAL void duk_substring(duk_hthread *thr, duk_idx_t idx, duk_size_t start_offset, duk_size_t end_offset) { duk_hstring *h; duk_hstring *res; duk_size_t start_byte_offset; duk_size_t end_byte_offset; duk_size_t charlen; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); /* Accept symbols. */ h = duk_require_hstring(thr, idx); DUK_ASSERT(h != NULL); charlen = DUK_HSTRING_GET_CHARLEN(h); if (end_offset >= charlen) { end_offset = charlen; } if (start_offset > end_offset) { start_offset = end_offset; } DUK_ASSERT_DISABLE(start_offset >= 0); DUK_ASSERT(start_offset <= end_offset && start_offset <= DUK_HSTRING_GET_CHARLEN(h)); DUK_ASSERT_DISABLE(end_offset >= 0); DUK_ASSERT(end_offset >= start_offset && end_offset <= DUK_HSTRING_GET_CHARLEN(h)); /* Guaranteed by string limits. */ DUK_ASSERT(start_offset <= DUK_UINT32_MAX); DUK_ASSERT(end_offset <= DUK_UINT32_MAX); start_byte_offset = (duk_size_t) duk_heap_strcache_offset_char2byte(thr, h, (duk_uint_fast32_t) start_offset); end_byte_offset = (duk_size_t) duk_heap_strcache_offset_char2byte(thr, h, (duk_uint_fast32_t) end_offset); DUK_ASSERT(end_byte_offset >= start_byte_offset); DUK_ASSERT(end_byte_offset - start_byte_offset <= DUK_UINT32_MAX); /* Guaranteed by string limits. */ /* No size check is necessary. */ res = duk_heap_strtable_intern_checked(thr, DUK_HSTRING_GET_DATA(h) + start_byte_offset, (duk_uint32_t) (end_byte_offset - start_byte_offset)); duk_push_hstring(thr, res); duk_replace(thr, idx); } /* XXX: this is quite clunky. Add Unicode helpers to scan backwards and * forwards with a callback to process codepoints? */ DUK_EXTERNAL void duk_trim(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; const duk_uint8_t *p, *p_start, *p_end, *p_tmp1, *p_tmp2; /* pointers for scanning */ const duk_uint8_t *q_start, *q_end; /* start (incl) and end (excl) of trimmed part */ duk_codepoint_t cp; DUK_ASSERT_API_ENTRY(thr); idx = duk_require_normalize_index(thr, idx); /* Accept symbols. */ h = duk_require_hstring(thr, idx); DUK_ASSERT(h != NULL); p_start = DUK_HSTRING_GET_DATA(h); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h); p = p_start; while (p < p_end) { p_tmp1 = p; cp = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(thr, &p_tmp1, p_start, p_end); if (!(duk_unicode_is_whitespace(cp) || duk_unicode_is_line_terminator(cp))) { break; } p = p_tmp1; } q_start = p; if (p == p_end) { /* Entire string is whitespace. */ q_end = p; goto scan_done; } p = p_end; while (p > p_start) { p_tmp1 = p; while (p > p_start) { p--; if (((*p) & 0xc0) != 0x80) { break; } } p_tmp2 = p; cp = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(thr, &p_tmp2, p_start, p_end); if (!(duk_unicode_is_whitespace(cp) || duk_unicode_is_line_terminator(cp))) { p = p_tmp1; break; } } q_end = p; scan_done: /* This may happen when forward and backward scanning disagree * (possible for non-extended-UTF-8 strings). */ if (q_end < q_start) { q_end = q_start; } DUK_ASSERT(q_start >= p_start && q_start <= p_end); DUK_ASSERT(q_end >= p_start && q_end <= p_end); DUK_ASSERT(q_end >= q_start); DUK_DDD(DUK_DDDPRINT("trim: p_start=%p, p_end=%p, q_start=%p, q_end=%p", (const void *) p_start, (const void *) p_end, (const void *) q_start, (const void *) q_end)); if (q_start == p_start && q_end == p_end) { DUK_DDD(DUK_DDDPRINT("nothing was trimmed: avoid interning (hashing etc)")); return; } duk_push_lstring(thr, (const char *) q_start, (duk_size_t) (q_end - q_start)); duk_replace(thr, idx); } DUK_EXTERNAL duk_codepoint_t duk_char_code_at(duk_hthread *thr, duk_idx_t idx, duk_size_t char_offset) { duk_hstring *h; duk_ucodepoint_t cp; DUK_ASSERT_API_ENTRY(thr); /* XXX: Share code with String.prototype.charCodeAt? Main difference * is handling of clamped offsets. */ h = duk_require_hstring(thr, idx); /* Accept symbols. */ DUK_ASSERT(h != NULL); DUK_ASSERT_DISABLE(char_offset >= 0); /* Always true, arg is unsigned. */ if (char_offset >= DUK_HSTRING_GET_CHARLEN(h)) { return 0; } DUK_ASSERT(char_offset <= DUK_UINT_MAX); /* Guaranteed by string limits. */ cp = duk_hstring_char_code_at_raw(thr, h, (duk_uint_t) char_offset, 0 /*surrogate_aware*/); return (duk_codepoint_t) cp; } /* * Date/time. */ /* #include duk_internal.h -> already included */ DUK_INTERNAL duk_double_t duk_time_get_ecmascript_time(duk_hthread *thr) { /* ECMAScript time, with millisecond fractions. Exposed via * duk_get_now() for example. */ DUK_UNREF(thr); return (duk_double_t) DUK_USE_DATE_GET_NOW(thr); } DUK_INTERNAL duk_double_t duk_time_get_ecmascript_time_nofrac(duk_hthread *thr) { /* ECMAScript time without millisecond fractions. Exposed via * the Date built-in which doesn't allow fractions. */ DUK_UNREF(thr); return (duk_double_t) DUK_FLOOR(DUK_USE_DATE_GET_NOW(thr)); } DUK_INTERNAL duk_double_t duk_time_get_monotonic_time(duk_hthread *thr) { DUK_UNREF(thr); #if defined(DUK_USE_GET_MONOTONIC_TIME) return (duk_double_t) DUK_USE_GET_MONOTONIC_TIME(thr); #else return (duk_double_t) DUK_USE_DATE_GET_NOW(thr); #endif } DUK_EXTERNAL duk_double_t duk_get_now(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(thr); /* This API intentionally allows millisecond fractions. */ return duk_time_get_ecmascript_time(thr); } #if 0 /* XXX: worth exposing? */ DUK_EXTERNAL duk_double_t duk_get_monotonic_time(duk_hthread *thr) { DUK_ASSERT_API_ENTRY(thr); DUK_UNREF(thr); return duk_time_get_monotonic_time(thr); } #endif DUK_EXTERNAL void duk_time_to_components(duk_hthread *thr, duk_double_t timeval, duk_time_components *comp) { duk_int_t parts[DUK_DATE_IDX_NUM_PARTS]; duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS]; duk_uint_t flags; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(comp != NULL); /* XXX: or check? */ DUK_UNREF(thr); /* Convert as one-based, but change month to zero-based to match the * ECMAScript Date built-in behavior 1:1. */ flags = DUK_DATE_FLAG_ONEBASED | DUK_DATE_FLAG_NAN_TO_ZERO; duk_bi_date_timeval_to_parts(timeval, parts, dparts, flags); /* XXX: sub-millisecond accuracy for the API */ DUK_ASSERT(dparts[DUK_DATE_IDX_MONTH] >= 1.0 && dparts[DUK_DATE_IDX_MONTH] <= 12.0); comp->year = dparts[DUK_DATE_IDX_YEAR]; comp->month = dparts[DUK_DATE_IDX_MONTH] - 1.0; comp->day = dparts[DUK_DATE_IDX_DAY]; comp->hours = dparts[DUK_DATE_IDX_HOUR]; comp->minutes = dparts[DUK_DATE_IDX_MINUTE]; comp->seconds = dparts[DUK_DATE_IDX_SECOND]; comp->milliseconds = dparts[DUK_DATE_IDX_MILLISECOND]; comp->weekday = dparts[DUK_DATE_IDX_WEEKDAY]; } DUK_EXTERNAL duk_double_t duk_components_to_time(duk_hthread *thr, duk_time_components *comp) { duk_double_t d; duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS]; duk_uint_t flags; DUK_ASSERT_API_ENTRY(thr); DUK_ASSERT(comp != NULL); /* XXX: or check? */ DUK_UNREF(thr); /* Match Date constructor behavior (with UTC time). Month is given * as zero-based. Day-of-month is given as one-based so normalize * it to zero-based as the internal conversion helpers expects all * components to be zero-based. */ flags = 0; /* XXX: expensive conversion; use array format in API instead, or unify * time provider and time API to use same struct? */ dparts[DUK_DATE_IDX_YEAR] = comp->year; dparts[DUK_DATE_IDX_MONTH] = comp->month; dparts[DUK_DATE_IDX_DAY] = comp->day - 1.0; dparts[DUK_DATE_IDX_HOUR] = comp->hours; dparts[DUK_DATE_IDX_MINUTE] = comp->minutes; dparts[DUK_DATE_IDX_SECOND] = comp->seconds; dparts[DUK_DATE_IDX_MILLISECOND] = comp->milliseconds; dparts[DUK_DATE_IDX_WEEKDAY] = 0; /* ignored */ d = duk_bi_date_get_timeval_from_dparts(dparts, flags); return d; } /* * Array built-ins * * Most Array built-ins are intentionally generic in ECMAScript, and are * intended to work even when the 'this' binding is not an Array instance. * This ECMAScript feature is also used by much real world code. For this * reason the implementations here don't assume exotic Array behavior or * e.g. presence of a .length property. However, some algorithms have a * fast path for duk_harray backed actual Array instances, enabled when * footprint is not a concern. * * XXX: the "Throw" flag should be set for (almost?) all [[Put]] and * [[Delete]] operations, but it's currently false throughout. Go through * all put/delete cases and check throw flag use. Need a new API primitive * which allows throws flag to be specified. * * XXX: array lengths above 2G won't work reliably. There are many places * where one needs a full signed 32-bit range ([-0xffffffff, 0xffffffff], * i.e. -33- bits). Although array 'length' cannot be written to be outside * the unsigned 32-bit range (E5.1 Section 15.4.5.1 throws a RangeError if so) * some intermediate values may be above 0xffffffff and this may not be always * correctly handled now (duk_uint32_t is not enough for all algorithms). * For instance, push() can legitimately write entries beyond length 0xffffffff * and cause a RangeError only at the end. To do this properly, the current * push() implementation tracks the array index using a 'double' instead of a * duk_uint32_t (which is somewhat awkward). See test-bi-array-push-maxlen.js. * * On using "put" vs. "def" prop * ============================= * * Code below must be careful to use the appropriate primitive as it matters * for compliance. When using "put" there may be inherited properties in * Array.prototype which cause side effects when values are written. When * using "define" there are no such side effects, and many test262 test cases * check for this (for real world code, such side effects are very rare). * Both "put" and "define" are used in the E5.1 specification; as a rule, * "put" is used when modifying an existing array (or a non-array 'this' * binding) and "define" for setting values into a fresh result array. */ /* #include duk_internal.h -> already included */ /* Perform an intermediate join when this many elements have been pushed * on the value stack. */ #define DUK__ARRAY_MID_JOIN_LIMIT 4096 #if defined(DUK_USE_ARRAY_BUILTIN) /* * Shared helpers. */ /* Shared entry code for many Array built-ins: the 'this' binding is pushed * on the value stack and object coerced, and the current .length is returned. * Note that length is left on stack (it could be popped, but that's not * usually necessary because call handling will clean it up automatically). */ DUK_LOCAL duk_uint32_t duk__push_this_obj_len_u32(duk_hthread *thr) { duk_uint32_t len; /* XXX: push more directly? */ (void) duk_push_this_coercible_to_object(thr); DUK_HOBJECT_ASSERT_VALID(duk_get_hobject(thr, -1)); duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_LENGTH); len = duk_to_uint32(thr, -1); /* -> [ ... ToObject(this) ToUint32(length) ] */ return len; } DUK_LOCAL duk_uint32_t duk__push_this_obj_len_u32_limited(duk_hthread *thr) { /* Range limited to [0, 0x7fffffff] range, i.e. range that can be * represented with duk_int32_t. Use this when the method doesn't * handle the full 32-bit unsigned range correctly. */ duk_uint32_t ret = duk__push_this_obj_len_u32(thr); if (DUK_UNLIKELY(ret >= 0x80000000UL)) { DUK_ERROR_RANGE_INVALID_LENGTH(thr); DUK_WO_NORETURN(return 0U;); } return ret; } #if defined(DUK_USE_ARRAY_FASTPATH) /* Check if 'this' binding is an Array instance (duk_harray) which satisfies * a few other guarantees for fast path operation. The fast path doesn't * need to handle all operations, even for duk_harrays, but must handle a * significant fraction to improve performance. Return a non-NULL duk_harray * pointer when all fast path criteria are met, NULL otherwise. */ DUK_LOCAL duk_harray *duk__arraypart_fastpath_this(duk_hthread *thr) { duk_tval *tv; duk_hobject *h; duk_uint_t flags_mask, flags_bits, flags_value; DUK_ASSERT(thr->valstack_bottom > thr->valstack); /* because call in progress */ tv = DUK_GET_THIS_TVAL_PTR(thr); /* Fast path requires that 'this' is a duk_harray. Read only arrays * (ROM backed) are also rejected for simplicity. */ if (!DUK_TVAL_IS_OBJECT(tv)) { DUK_DD(DUK_DDPRINT("reject array fast path: not an object")); return NULL; } h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); flags_mask = DUK_HOBJECT_FLAG_ARRAY_PART | \ DUK_HOBJECT_FLAG_EXOTIC_ARRAY | \ DUK_HEAPHDR_FLAG_READONLY; flags_bits = DUK_HOBJECT_FLAG_ARRAY_PART | \ DUK_HOBJECT_FLAG_EXOTIC_ARRAY; flags_value = DUK_HEAPHDR_GET_FLAGS_RAW((duk_heaphdr *) h); if ((flags_value & flags_mask) != flags_bits) { DUK_DD(DUK_DDPRINT("reject array fast path: object flag check failed")); return NULL; } /* In some cases a duk_harray's 'length' may be larger than the * current array part allocation. Avoid the fast path in these * cases, so that all fast path code can safely assume that all * items in the range [0,length[ are backed by the current array * part allocation. */ if (((duk_harray *) h)->length > DUK_HOBJECT_GET_ASIZE(h)) { DUK_DD(DUK_DDPRINT("reject array fast path: length > array part size")); return NULL; } /* Guarantees for fast path. */ DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HOBJECT_GET_ASIZE(h) == 0 || DUK_HOBJECT_A_GET_BASE(thr->heap, h) != NULL); DUK_ASSERT(((duk_harray *) h)->length <= DUK_HOBJECT_GET_ASIZE(h)); DUK_DD(DUK_DDPRINT("array fast path allowed for: %!O", (duk_heaphdr *) h)); return (duk_harray *) h; } #endif /* DUK_USE_ARRAY_FASTPATH */ /* * Constructor */ DUK_INTERNAL duk_ret_t duk_bi_array_constructor(duk_hthread *thr) { duk_idx_t nargs; duk_harray *a; duk_double_t d; duk_uint32_t len; duk_uint32_t len_prealloc; nargs = duk_get_top(thr); if (nargs == 1 && duk_is_number(thr, 0)) { /* XXX: expensive check (also shared elsewhere - so add a shared internal API call?) */ d = duk_get_number(thr, 0); len = duk_to_uint32(thr, 0); if (((duk_double_t) len) != d) { DUK_DCERROR_RANGE_INVALID_LENGTH(thr); } /* For small lengths create a dense preallocated array. * For large arrays preallocate an initial part. */ len_prealloc = len < 64 ? len : 64; a = duk_push_harray_with_size(thr, len_prealloc); DUK_ASSERT(a != NULL); DUK_ASSERT(!duk_is_bare_object(thr, -1)); a->length = len; return 1; } duk_pack(thr, nargs); return 1; } /* * isArray() */ DUK_INTERNAL duk_ret_t duk_bi_array_constructor_is_array(duk_hthread *thr) { duk_hobject *h; h = duk_get_hobject_with_class(thr, 0, DUK_HOBJECT_CLASS_ARRAY); duk_push_boolean(thr, (h != NULL)); return 1; } /* * toString() */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_to_string(duk_hthread *thr) { (void) duk_push_this_coercible_to_object(thr); duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_JOIN); /* [ ... this func ] */ if (!duk_is_callable(thr, -1)) { /* Fall back to the initial (original) Object.toString(). We don't * currently have pointers to the built-in functions, only the top * level global objects (like "Array") so this is now done in a bit * of a hacky manner. It would be cleaner to push the (original) * function and use duk_call_method(). */ /* XXX: 'this' will be ToObject() coerced twice, which is incorrect * but should have no visible side effects. */ DUK_DDD(DUK_DDDPRINT("this.join is not callable, fall back to (original) Object.toString")); duk_set_top(thr, 0); return duk_bi_object_prototype_to_string(thr); /* has access to 'this' binding */ } /* [ ... this func ] */ duk_insert(thr, -2); /* [ ... func this ] */ DUK_DDD(DUK_DDDPRINT("calling: func=%!iT, this=%!iT", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); duk_call_method(thr, 0); return 1; } /* * concat() */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_concat(duk_hthread *thr) { duk_idx_t i, n; duk_uint32_t j, idx, len; duk_hobject *h; duk_size_t tmp_len; /* XXX: In ES2015 Array .length can be up to 2^53-1. The current * implementation is limited to 2^32-1. */ /* XXX: Fast path for array 'this' and array element. */ /* XXX: The insert here is a bit expensive if there are a lot of items. * It could also be special cased in the outermost for loop quite easily * (as the element is dup()'d anyway). */ (void) duk_push_this_coercible_to_object(thr); duk_insert(thr, 0); n = duk_get_top(thr); duk_push_array(thr); /* -> [ ToObject(this) item1 ... itemN arr ] */ /* NOTE: The Array special behaviors are NOT invoked by duk_xdef_prop_index() * (which differs from the official algorithm). If no error is thrown, this * doesn't matter as the length is updated at the end. However, if an error * is thrown, the length will be unset. That shouldn't matter because the * caller won't get a reference to the intermediate value. */ idx = 0; for (i = 0; i < n; i++) { duk_bool_t spreadable; duk_bool_t need_has_check; DUK_ASSERT_TOP(thr, n + 1); /* [ ToObject(this) item1 ... itemN arr ] */ h = duk_get_hobject(thr, i); if (h == NULL) { spreadable = 0; } else { #if defined(DUK_USE_SYMBOL_BUILTIN) duk_get_prop_stridx(thr, i, DUK_STRIDX_WELLKNOWN_SYMBOL_IS_CONCAT_SPREADABLE); if (duk_is_undefined(thr, -1)) { spreadable = (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY); } else { spreadable = duk_to_boolean(thr, -1); } duk_pop_nodecref_unsafe(thr); #else spreadable = (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY); #endif } if (!spreadable) { duk_dup(thr, i); duk_xdef_prop_index_wec(thr, -2, idx); idx++; if (DUK_UNLIKELY(idx == 0U)) { /* Index after update is 0, and index written * was 0xffffffffUL which is no longer a valid * array index. */ goto fail_wrap; } continue; } DUK_ASSERT(duk_is_object(thr, i)); need_has_check = (DUK_HOBJECT_IS_PROXY(h) != 0); /* Always 0 w/o Proxy support. */ /* [ ToObject(this) item1 ... itemN arr ] */ tmp_len = duk_get_length(thr, i); len = (duk_uint32_t) tmp_len; if (DUK_UNLIKELY(tmp_len != (duk_size_t) len)) { goto fail_wrap; } if (DUK_UNLIKELY(idx + len < idx)) { /* Result length must be at most 0xffffffffUL to be * a valid 32-bit array index. */ goto fail_wrap; } for (j = 0; j < len; j++) { /* For a Proxy element, an explicit 'has' check is * needed to allow the Proxy to present gaps. */ if (need_has_check) { if (duk_has_prop_index(thr, i, j)) { duk_get_prop_index(thr, i, j); duk_xdef_prop_index_wec(thr, -2, idx); } } else { if (duk_get_prop_index(thr, i, j)) { duk_xdef_prop_index_wec(thr, -2, idx); } else { duk_pop_undefined(thr); } } idx++; DUK_ASSERT(idx != 0U); /* Wrap check above. */ } } /* ES5.1 has a specification "bug" in that nonexistent trailing * elements don't affect the result .length. Test262 and other * engines disagree, and the specification bug was fixed in ES2015 * (see NOTE 1 in https://www.ecma-international.org/ecma-262/6.0/#sec-array.prototype.concat). */ duk_push_uarridx(thr, idx); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W); DUK_ASSERT_TOP(thr, n + 1); return 1; fail_wrap: DUK_ERROR_RANGE_INVALID_LENGTH(thr); DUK_WO_NORETURN(return 0;); } /* * join(), toLocaleString() * * Note: checking valstack is necessary, but only in the per-element loop. * * Note: the trivial approach of pushing all the elements on the value stack * and then calling duk_join() fails when the array contains a large number * of elements. This problem can't be offloaded to duk_join() because the * elements to join must be handled here and have special handling. Current * approach is to do intermediate joins with very large number of elements. * There is no fancy handling; the prefix gets re-joined multiple times. */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_join_shared(duk_hthread *thr) { duk_uint32_t len, count; duk_uint32_t idx; duk_small_int_t to_locale_string = duk_get_current_magic(thr); duk_idx_t valstack_required; /* For join(), nargs is 1. For toLocaleString(), nargs is 0 and * setting the top essentially pushes an undefined to the stack, * thus defaulting to a comma separator. */ duk_set_top(thr, 1); if (duk_is_undefined(thr, 0)) { duk_pop_undefined(thr); duk_push_hstring_stridx(thr, DUK_STRIDX_COMMA); } else { duk_to_string(thr, 0); } len = duk__push_this_obj_len_u32(thr); /* [ sep ToObject(this) len ] */ DUK_DDD(DUK_DDDPRINT("sep=%!T, this=%!T, len=%lu", (duk_tval *) duk_get_tval(thr, 0), (duk_tval *) duk_get_tval(thr, 1), (unsigned long) len)); /* The extra (+4) is tight. */ valstack_required = (duk_idx_t) ((len >= DUK__ARRAY_MID_JOIN_LIMIT ? DUK__ARRAY_MID_JOIN_LIMIT : len) + 4); duk_require_stack(thr, valstack_required); duk_dup_0(thr); /* [ sep ToObject(this) len sep ] */ count = 0; idx = 0; for (;;) { DUK_DDD(DUK_DDDPRINT("join idx=%ld", (long) idx)); if (count >= DUK__ARRAY_MID_JOIN_LIMIT || /* intermediate join to avoid valstack overflow */ idx >= len) { /* end of loop (careful with len==0) */ /* [ sep ToObject(this) len sep str0 ... str(count-1) ] */ DUK_DDD(DUK_DDDPRINT("mid/final join, count=%ld, idx=%ld, len=%ld", (long) count, (long) idx, (long) len)); duk_join(thr, (duk_idx_t) count); /* -> [ sep ToObject(this) len str ] */ duk_dup_0(thr); /* -> [ sep ToObject(this) len str sep ] */ duk_insert(thr, -2); /* -> [ sep ToObject(this) len sep str ] */ count = 1; } if (idx >= len) { /* if true, the stack already contains the final result */ break; } duk_get_prop_index(thr, 1, (duk_uarridx_t) idx); if (duk_is_null_or_undefined(thr, -1)) { duk_pop_nodecref_unsafe(thr); duk_push_hstring_empty(thr); } else { if (to_locale_string) { duk_to_object(thr, -1); duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_TO_LOCALE_STRING); duk_insert(thr, -2); /* -> [ ... toLocaleString ToObject(val) ] */ duk_call_method(thr, 0); } duk_to_string(thr, -1); } count++; idx++; } /* [ sep ToObject(this) len sep result ] */ return 1; } /* * pop(), push() */ #if defined(DUK_USE_ARRAY_FASTPATH) DUK_LOCAL duk_ret_t duk__array_pop_fastpath(duk_hthread *thr, duk_harray *h_arr) { duk_tval *tv_arraypart; duk_tval *tv_val; duk_uint32_t len; tv_arraypart = DUK_HOBJECT_A_GET_BASE(thr->heap, (duk_hobject *) h_arr); len = h_arr->length; if (len <= 0) { /* nop, return undefined */ return 0; } len--; h_arr->length = len; /* Fast path doesn't check for an index property inherited from * Array.prototype. This is quite often acceptable; if not, * disable fast path. */ DUK_ASSERT_VS_SPACE(thr); tv_val = tv_arraypart + len; if (DUK_TVAL_IS_UNUSED(tv_val)) { /* No net refcount change. Value stack already has * 'undefined' based on value stack init policy. */ DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top)); DUK_ASSERT(DUK_TVAL_IS_UNUSED(tv_val)); } else { /* No net refcount change. */ DUK_TVAL_SET_TVAL(thr->valstack_top, tv_val); DUK_TVAL_SET_UNUSED(tv_val); } thr->valstack_top++; /* XXX: there's no shrink check in the fast path now */ return 1; } #endif /* DUK_USE_ARRAY_FASTPATH */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_pop(duk_hthread *thr) { duk_uint32_t len; duk_uint32_t idx; #if defined(DUK_USE_ARRAY_FASTPATH) duk_harray *h_arr; #endif DUK_ASSERT_TOP(thr, 0); #if defined(DUK_USE_ARRAY_FASTPATH) h_arr = duk__arraypart_fastpath_this(thr); if (h_arr) { return duk__array_pop_fastpath(thr, h_arr); } #endif /* XXX: Merge fastpath check into a related call (push this, coerce length, etc)? */ len = duk__push_this_obj_len_u32(thr); if (len == 0) { duk_push_int(thr, 0); duk_put_prop_stridx_short(thr, 0, DUK_STRIDX_LENGTH); return 0; } idx = len - 1; duk_get_prop_index(thr, 0, (duk_uarridx_t) idx); duk_del_prop_index(thr, 0, (duk_uarridx_t) idx); duk_push_u32(thr, idx); duk_put_prop_stridx_short(thr, 0, DUK_STRIDX_LENGTH); return 1; } #if defined(DUK_USE_ARRAY_FASTPATH) DUK_LOCAL duk_ret_t duk__array_push_fastpath(duk_hthread *thr, duk_harray *h_arr) { duk_tval *tv_arraypart; duk_tval *tv_src; duk_tval *tv_dst; duk_uint32_t len; duk_idx_t i, n; len = h_arr->length; tv_arraypart = DUK_HOBJECT_A_GET_BASE(thr->heap, (duk_hobject *) h_arr); n = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom); DUK_ASSERT(n >= 0); DUK_ASSERT((duk_uint32_t) n <= DUK_UINT32_MAX); if (DUK_UNLIKELY(len + (duk_uint32_t) n < len)) { DUK_D(DUK_DPRINT("Array.prototype.push() would go beyond 32-bit length, throw")); DUK_DCERROR_RANGE_INVALID_LENGTH(thr); /* != 0 return value returned as is by caller */ } if (len + (duk_uint32_t) n > DUK_HOBJECT_GET_ASIZE((duk_hobject *) h_arr)) { /* Array part would need to be extended. Rely on slow path * for now. * * XXX: Rework hobject code a bit and add extend support. */ return 0; } tv_src = thr->valstack_bottom; tv_dst = tv_arraypart + len; for (i = 0; i < n; i++) { /* No net refcount change; reset value stack values to * undefined to satisfy value stack init policy. */ DUK_TVAL_SET_TVAL(tv_dst, tv_src); DUK_TVAL_SET_UNDEFINED(tv_src); tv_src++; tv_dst++; } thr->valstack_top = thr->valstack_bottom; len += (duk_uint32_t) n; h_arr->length = len; DUK_ASSERT((duk_uint_t) len == len); duk_push_uint(thr, (duk_uint_t) len); return 1; } #endif /* DUK_USE_ARRAY_FASTPATH */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_push(duk_hthread *thr) { /* Note: 'this' is not necessarily an Array object. The push() * algorithm is supposed to work for other kinds of objects too, * so the algorithm has e.g. an explicit update for the 'length' * property which is normally "magical" in arrays. */ duk_uint32_t len; duk_idx_t i, n; #if defined(DUK_USE_ARRAY_FASTPATH) duk_harray *h_arr; #endif #if defined(DUK_USE_ARRAY_FASTPATH) h_arr = duk__arraypart_fastpath_this(thr); if (h_arr) { duk_ret_t rc; rc = duk__array_push_fastpath(thr, h_arr); if (rc != 0) { return rc; } DUK_DD(DUK_DDPRINT("array push() fast path exited, resize case")); } #endif n = duk_get_top(thr); len = duk__push_this_obj_len_u32(thr); /* [ arg1 ... argN obj length ] */ /* Technically Array.prototype.push() can create an Array with length * longer than 2^32-1, i.e. outside the 32-bit range. The final length * is *not* wrapped to 32 bits in the specification. * * This implementation tracks length with a uint32 because it's much * more practical. * * See: test-bi-array-push-maxlen.js. */ if (len + (duk_uint32_t) n < len) { DUK_D(DUK_DPRINT("Array.prototype.push() would go beyond 32-bit length, throw")); DUK_DCERROR_RANGE_INVALID_LENGTH(thr); } for (i = 0; i < n; i++) { duk_dup(thr, i); duk_put_prop_index(thr, -3, (duk_uarridx_t) (len + (duk_uint32_t) i)); } len += (duk_uint32_t) n; duk_push_u32(thr, len); duk_dup_top(thr); duk_put_prop_stridx_short(thr, -4, DUK_STRIDX_LENGTH); /* [ arg1 ... argN obj length new_length ] */ return 1; } /* * sort() * * Currently qsort with random pivot. This is now really, really slow, * because there is no fast path for array parts. * * Signed indices are used because qsort() leaves and degenerate cases * may use a negative offset. */ DUK_LOCAL duk_small_int_t duk__array_sort_compare(duk_hthread *thr, duk_int_t idx1, duk_int_t idx2) { duk_bool_t have1, have2; duk_bool_t undef1, undef2; duk_small_int_t ret; duk_idx_t idx_obj = 1; /* fixed offsets in valstack */ duk_idx_t idx_fn = 0; duk_hstring *h1, *h2; /* Fast exit if indices are identical. This is valid for a non-existent property, * for an undefined value, and almost always for ToString() coerced comparison of * arbitrary values (corner cases where this is not the case include e.g. a an * object with varying ToString() coercion). * * The specification does not prohibit "caching" of values read from the array, so * assuming equality for comparing an index with itself falls into the category of * "caching". * * Also, compareFn may be inconsistent, so skipping a call to compareFn here may * have an effect on the final result. The specification does not require any * specific behavior for inconsistent compare functions, so again, this fast path * is OK. */ if (idx1 == idx2) { DUK_DDD(DUK_DDDPRINT("duk__array_sort_compare: idx1=%ld, idx2=%ld -> indices identical, quick exit", (long) idx1, (long) idx2)); return 0; } have1 = duk_get_prop_index(thr, idx_obj, (duk_uarridx_t) idx1); have2 = duk_get_prop_index(thr, idx_obj, (duk_uarridx_t) idx2); DUK_DDD(DUK_DDDPRINT("duk__array_sort_compare: idx1=%ld, idx2=%ld, have1=%ld, have2=%ld, val1=%!T, val2=%!T", (long) idx1, (long) idx2, (long) have1, (long) have2, (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); if (have1) { if (have2) { ; } else { ret = -1; goto pop_ret; } } else { if (have2) { ret = 1; goto pop_ret; } else { ret = 0; goto pop_ret; } } undef1 = duk_is_undefined(thr, -2); undef2 = duk_is_undefined(thr, -1); if (undef1) { if (undef2) { ret = 0; goto pop_ret; } else { ret = 1; goto pop_ret; } } else { if (undef2) { ret = -1; goto pop_ret; } else { ; } } if (!duk_is_undefined(thr, idx_fn)) { duk_double_t d; /* No need to check callable; duk_call() will do that. */ duk_dup(thr, idx_fn); /* -> [ ... x y fn ] */ duk_insert(thr, -3); /* -> [ ... fn x y ] */ duk_call(thr, 2); /* -> [ ... res ] */ /* ES5 is a bit vague about what to do if the return value is * not a number. ES2015 provides a concrete description: * http://www.ecma-international.org/ecma-262/6.0/#sec-sortcompare. */ d = duk_to_number_m1(thr); if (d < 0.0) { ret = -1; } else if (d > 0.0) { ret = 1; } else { /* Because NaN compares to false, NaN is handled here * without an explicit check above. */ ret = 0; } duk_pop_nodecref_unsafe(thr); DUK_DDD(DUK_DDDPRINT("-> result %ld (from comparefn, after coercion)", (long) ret)); return ret; } /* string compare is the default (a bit oddly) */ /* XXX: any special handling for plain array; causes repeated coercion now? */ h1 = duk_to_hstring(thr, -2); h2 = duk_to_hstring_m1(thr); DUK_ASSERT(h1 != NULL); DUK_ASSERT(h2 != NULL); ret = duk_js_string_compare(h1, h2); /* retval is directly usable */ goto pop_ret; pop_ret: duk_pop_2_unsafe(thr); DUK_DDD(DUK_DDDPRINT("-> result %ld", (long) ret)); return ret; } DUK_LOCAL void duk__array_sort_swap(duk_hthread *thr, duk_int_t l, duk_int_t r) { duk_bool_t have_l, have_r; duk_idx_t idx_obj = 1; /* fixed offset in valstack */ if (l == r) { return; } /* swap elements; deal with non-existent elements correctly */ have_l = duk_get_prop_index(thr, idx_obj, (duk_uarridx_t) l); have_r = duk_get_prop_index(thr, idx_obj, (duk_uarridx_t) r); if (have_r) { /* right exists, [[Put]] regardless whether or not left exists */ duk_put_prop_index(thr, idx_obj, (duk_uarridx_t) l); } else { duk_del_prop_index(thr, idx_obj, (duk_uarridx_t) l); duk_pop_undefined(thr); } if (have_l) { duk_put_prop_index(thr, idx_obj, (duk_uarridx_t) r); } else { duk_del_prop_index(thr, idx_obj, (duk_uarridx_t) r); duk_pop_undefined(thr); } } #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) /* Debug print which visualizes the qsort partitioning process. */ DUK_LOCAL void duk__debuglog_qsort_state(duk_hthread *thr, duk_int_t lo, duk_int_t hi, duk_int_t pivot) { char buf[4096]; char *ptr = buf; duk_int_t i, n; n = (duk_int_t) duk_get_length(thr, 1); if (n > 4000) { n = 4000; } *ptr++ = '['; for (i = 0; i < n; i++) { if (i == pivot) { *ptr++ = '|'; } else if (i == lo) { *ptr++ = '<'; } else if (i == hi) { *ptr++ = '>'; } else if (i >= lo && i <= hi) { *ptr++ = '-'; } else { *ptr++ = ' '; } } *ptr++ = ']'; *ptr++ = '\0'; DUK_DDD(DUK_DDDPRINT("%s (lo=%ld, hi=%ld, pivot=%ld)", (const char *) buf, (long) lo, (long) hi, (long) pivot)); } #endif DUK_LOCAL void duk__array_qsort(duk_hthread *thr, duk_int_t lo, duk_int_t hi) { duk_int_t p, l, r; /* The lo/hi indices may be crossed and hi < 0 is possible at entry. */ DUK_DDD(DUK_DDDPRINT("duk__array_qsort: lo=%ld, hi=%ld, obj=%!T", (long) lo, (long) hi, (duk_tval *) duk_get_tval(thr, 1))); DUK_ASSERT_TOP(thr, 3); /* In some cases it may be that lo > hi, or hi < 0; these * degenerate cases happen e.g. for empty arrays, and in * recursion leaves. */ /* trivial cases */ if (hi - lo < 1) { DUK_DDD(DUK_DDDPRINT("degenerate case, return immediately")); return; } DUK_ASSERT(hi > lo); DUK_ASSERT(hi - lo + 1 >= 2); /* randomized pivot selection */ p = lo + (duk_int_t) (DUK_UTIL_GET_RANDOM_DOUBLE(thr) * (duk_double_t) (hi - lo + 1)); DUK_ASSERT(p >= lo && p <= hi); DUK_DDD(DUK_DDDPRINT("lo=%ld, hi=%ld, chose pivot p=%ld", (long) lo, (long) hi, (long) p)); /* move pivot out of the way */ duk__array_sort_swap(thr, p, lo); p = lo; DUK_DDD(DUK_DDDPRINT("pivot moved out of the way: %!T", (duk_tval *) duk_get_tval(thr, 1))); l = lo + 1; r = hi; for (;;) { /* find elements to swap */ for (;;) { DUK_DDD(DUK_DDDPRINT("left scan: l=%ld, r=%ld, p=%ld", (long) l, (long) r, (long) p)); if (l >= hi) { break; } if (duk__array_sort_compare(thr, l, p) >= 0) { /* !(l < p) */ break; } l++; } for (;;) { DUK_DDD(DUK_DDDPRINT("right scan: l=%ld, r=%ld, p=%ld", (long) l, (long) r, (long) p)); if (r <= lo) { break; } if (duk__array_sort_compare(thr, p, r) >= 0) { /* !(p < r) */ break; } r--; } if (l >= r) { goto done; } DUK_ASSERT(l < r); DUK_DDD(DUK_DDDPRINT("swap %ld and %ld", (long) l, (long) r)); duk__array_sort_swap(thr, l, r); DUK_DDD(DUK_DDDPRINT("after swap: %!T", (duk_tval *) duk_get_tval(thr, 1))); l++; r--; } done: /* Note that 'l' and 'r' may cross, i.e. r < l */ DUK_ASSERT(l >= lo && l <= hi); DUK_ASSERT(r >= lo && r <= hi); /* XXX: there's no explicit recursion bound here now. For the average * qsort recursion depth O(log n) that's not really necessary: e.g. for * 2**32 recursion depth would be about 32 which is OK. However, qsort * worst case recursion depth is O(n) which may be a problem. */ /* move pivot to its final place */ DUK_DDD(DUK_DDDPRINT("before final pivot swap: %!T", (duk_tval *) duk_get_tval(thr, 1))); duk__array_sort_swap(thr, lo, r); #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) duk__debuglog_qsort_state(thr, lo, hi, r); #endif DUK_DDD(DUK_DDDPRINT("recurse: pivot=%ld, obj=%!T", (long) r, (duk_tval *) duk_get_tval(thr, 1))); duk__array_qsort(thr, lo, r - 1); duk__array_qsort(thr, r + 1, hi); } DUK_INTERNAL duk_ret_t duk_bi_array_prototype_sort(duk_hthread *thr) { duk_uint32_t len; /* XXX: len >= 0x80000000 won't work below because a signed type * is needed by qsort. */ len = duk__push_this_obj_len_u32_limited(thr); /* stack[0] = compareFn * stack[1] = ToObject(this) * stack[2] = ToUint32(length) */ if (len > 0) { /* avoid degenerate cases, so that (len - 1) won't underflow */ duk__array_qsort(thr, (duk_int_t) 0, (duk_int_t) (len - 1)); } DUK_ASSERT_TOP(thr, 3); duk_pop_nodecref_unsafe(thr); return 1; /* return ToObject(this) */ } /* * splice() */ /* XXX: this compiles to over 500 bytes now, even without special handling * for an array part. Uses signed ints so does not handle full array range correctly. */ /* XXX: can shift() / unshift() use the same helper? * shift() is (close to?) <--> splice(0, 1) * unshift is (close to?) <--> splice(0, 0, [items])? */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_splice(duk_hthread *thr) { duk_idx_t nargs; duk_uint32_t len_u32; duk_int_t len; duk_bool_t have_delcount; duk_int_t item_count; duk_int_t act_start; duk_int_t del_count; duk_int_t i, n; DUK_UNREF(have_delcount); nargs = duk_get_top(thr); if (nargs < 2) { duk_set_top(thr, 2); nargs = 2; have_delcount = 0; } else { have_delcount = 1; } /* XXX: len >= 0x80000000 won't work below because we need to be * able to represent -len. */ len_u32 = duk__push_this_obj_len_u32_limited(thr); len = (duk_int_t) len_u32; DUK_ASSERT(len >= 0); act_start = duk_to_int_clamped(thr, 0, -len, len); if (act_start < 0) { act_start = len + act_start; } DUK_ASSERT(act_start >= 0 && act_start <= len); #if defined(DUK_USE_NONSTD_ARRAY_SPLICE_DELCOUNT) if (have_delcount) { #endif del_count = duk_to_int_clamped(thr, 1, 0, len - act_start); #if defined(DUK_USE_NONSTD_ARRAY_SPLICE_DELCOUNT) } else { /* E5.1 standard behavior when deleteCount is not given would be * to treat it just like if 'undefined' was given, which coerces * ultimately to 0. Real world behavior is to splice to the end * of array, see test-bi-array-proto-splice-no-delcount.js. */ del_count = len - act_start; } #endif DUK_ASSERT(nargs >= 2); item_count = (duk_int_t) (nargs - 2); DUK_ASSERT(del_count >= 0 && del_count <= len - act_start); DUK_ASSERT(del_count + act_start <= len); /* For now, restrict result array into 32-bit length range. */ if (((duk_double_t) len) - ((duk_double_t) del_count) + ((duk_double_t) item_count) > (duk_double_t) DUK_UINT32_MAX) { DUK_D(DUK_DPRINT("Array.prototype.splice() would go beyond 32-bit length, throw")); DUK_DCERROR_RANGE_INVALID_LENGTH(thr); } duk_push_array(thr); /* stack[0] = start * stack[1] = deleteCount * stack[2...nargs-1] = items * stack[nargs] = ToObject(this) -3 * stack[nargs+1] = ToUint32(length) -2 * stack[nargs+2] = result array -1 */ DUK_ASSERT_TOP(thr, nargs + 3); /* Step 9: copy elements-to-be-deleted into the result array */ for (i = 0; i < del_count; i++) { if (duk_get_prop_index(thr, -3, (duk_uarridx_t) (act_start + i))) { duk_xdef_prop_index_wec(thr, -2, (duk_uarridx_t) i); /* throw flag irrelevant (false in std alg) */ } else { duk_pop_undefined(thr); } } duk_push_u32(thr, (duk_uint32_t) del_count); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W); /* Steps 12 and 13: reorganize elements to make room for itemCount elements */ if (item_count < del_count) { /* [ A B C D E F G H ] rel_index = 2, del_count 3, item count 1 * -> [ A B F G H ] (conceptual intermediate step) * -> [ A B . F G H ] (placeholder marked) * [ A B C F G H ] (actual result at this point, C will be replaced) */ DUK_ASSERT_TOP(thr, nargs + 3); n = len - del_count; for (i = act_start; i < n; i++) { if (duk_get_prop_index(thr, -3, (duk_uarridx_t) (i + del_count))) { duk_put_prop_index(thr, -4, (duk_uarridx_t) (i + item_count)); } else { duk_pop_undefined(thr); duk_del_prop_index(thr, -3, (duk_uarridx_t) (i + item_count)); } } DUK_ASSERT_TOP(thr, nargs + 3); /* loop iterator init and limit changed from standard algorithm */ n = len - del_count + item_count; for (i = len - 1; i >= n; i--) { duk_del_prop_index(thr, -3, (duk_uarridx_t) i); } DUK_ASSERT_TOP(thr, nargs + 3); } else if (item_count > del_count) { /* [ A B C D E F G H ] rel_index = 2, del_count 3, item count 4 * -> [ A B F G H ] (conceptual intermediate step) * -> [ A B . . . . F G H ] (placeholder marked) * [ A B C D E F F G H ] (actual result at this point) */ DUK_ASSERT_TOP(thr, nargs + 3); /* loop iterator init and limit changed from standard algorithm */ for (i = len - del_count - 1; i >= act_start; i--) { if (duk_get_prop_index(thr, -3, (duk_uarridx_t) (i + del_count))) { duk_put_prop_index(thr, -4, (duk_uarridx_t) (i + item_count)); } else { duk_pop_undefined(thr); duk_del_prop_index(thr, -3, (duk_uarridx_t) (i + item_count)); } } DUK_ASSERT_TOP(thr, nargs + 3); } else { /* [ A B C D E F G H ] rel_index = 2, del_count 3, item count 3 * -> [ A B F G H ] (conceptual intermediate step) * -> [ A B . . . F G H ] (placeholder marked) * [ A B C D E F G H ] (actual result at this point) */ } DUK_ASSERT_TOP(thr, nargs + 3); /* Step 15: insert itemCount elements into the hole made above */ for (i = 0; i < item_count; i++) { duk_dup(thr, i + 2); /* args start at index 2 */ duk_put_prop_index(thr, -4, (duk_uarridx_t) (act_start + i)); } /* Step 16: update length; note that the final length may be above 32 bit range * (but we checked above that this isn't the case here) */ duk_push_u32(thr, (duk_uint32_t) (len - del_count + item_count)); duk_put_prop_stridx_short(thr, -4, DUK_STRIDX_LENGTH); /* result array is already at the top of stack */ DUK_ASSERT_TOP(thr, nargs + 3); return 1; } /* * reverse() */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_reverse(duk_hthread *thr) { duk_uint32_t len; duk_uint32_t middle; duk_uint32_t lower, upper; duk_bool_t have_lower, have_upper; len = duk__push_this_obj_len_u32(thr); middle = len / 2; /* If len <= 1, middle will be 0 and for-loop bails out * immediately (0 < 0 -> false). */ for (lower = 0; lower < middle; lower++) { DUK_ASSERT(len >= 2); DUK_ASSERT_TOP(thr, 2); DUK_ASSERT(len >= lower + 1); upper = len - lower - 1; have_lower = duk_get_prop_index(thr, -2, (duk_uarridx_t) lower); have_upper = duk_get_prop_index(thr, -3, (duk_uarridx_t) upper); /* [ ToObject(this) ToUint32(length) lowerValue upperValue ] */ if (have_upper) { duk_put_prop_index(thr, -4, (duk_uarridx_t) lower); } else { duk_del_prop_index(thr, -4, (duk_uarridx_t) lower); duk_pop_undefined(thr); } if (have_lower) { duk_put_prop_index(thr, -3, (duk_uarridx_t) upper); } else { duk_del_prop_index(thr, -3, (duk_uarridx_t) upper); duk_pop_undefined(thr); } DUK_ASSERT_TOP(thr, 2); } DUK_ASSERT_TOP(thr, 2); duk_pop_unsafe(thr); /* -> [ ToObject(this) ] */ return 1; } /* * slice() */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_slice(duk_hthread *thr) { duk_uint32_t len_u32; duk_int_t len; duk_int_t start, end; duk_int_t i; duk_uarridx_t idx; duk_uint32_t res_length = 0; /* XXX: len >= 0x80000000 won't work below because we need to be * able to represent -len. */ len_u32 = duk__push_this_obj_len_u32_limited(thr); len = (duk_int_t) len_u32; DUK_ASSERT(len >= 0); duk_push_array(thr); /* stack[0] = start * stack[1] = end * stack[2] = ToObject(this) * stack[3] = ToUint32(length) * stack[4] = result array */ start = duk_to_int_clamped(thr, 0, -len, len); if (start < 0) { start = len + start; } /* XXX: could duk_is_undefined() provide defaulting undefined to 'len' * (the upper limit)? */ if (duk_is_undefined(thr, 1)) { end = len; } else { end = duk_to_int_clamped(thr, 1, -len, len); if (end < 0) { end = len + end; } } DUK_ASSERT(start >= 0 && start <= len); DUK_ASSERT(end >= 0 && end <= len); idx = 0; for (i = start; i < end; i++) { DUK_ASSERT_TOP(thr, 5); if (duk_get_prop_index(thr, 2, (duk_uarridx_t) i)) { duk_xdef_prop_index_wec(thr, 4, idx); res_length = idx + 1; } else { duk_pop_undefined(thr); } idx++; DUK_ASSERT_TOP(thr, 5); } duk_push_u32(thr, res_length); duk_xdef_prop_stridx_short(thr, 4, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W); DUK_ASSERT_TOP(thr, 5); return 1; } /* * shift() */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_shift(duk_hthread *thr) { duk_uint32_t len; duk_uint32_t i; len = duk__push_this_obj_len_u32(thr); if (len == 0) { duk_push_int(thr, 0); duk_put_prop_stridx_short(thr, 0, DUK_STRIDX_LENGTH); return 0; } duk_get_prop_index(thr, 0, 0); /* stack[0] = object (this) * stack[1] = ToUint32(length) * stack[2] = elem at index 0 (retval) */ for (i = 1; i < len; i++) { DUK_ASSERT_TOP(thr, 3); if (duk_get_prop_index(thr, 0, (duk_uarridx_t) i)) { /* fromPresent = true */ duk_put_prop_index(thr, 0, (duk_uarridx_t) (i - 1)); } else { /* fromPresent = false */ duk_del_prop_index(thr, 0, (duk_uarridx_t) (i - 1)); duk_pop_undefined(thr); } } duk_del_prop_index(thr, 0, (duk_uarridx_t) (len - 1)); duk_push_u32(thr, (duk_uint32_t) (len - 1)); duk_put_prop_stridx_short(thr, 0, DUK_STRIDX_LENGTH); DUK_ASSERT_TOP(thr, 3); return 1; } /* * unshift() */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_unshift(duk_hthread *thr) { duk_idx_t nargs; duk_uint32_t len; duk_uint32_t i; nargs = duk_get_top(thr); len = duk__push_this_obj_len_u32(thr); /* stack[0...nargs-1] = unshift args (vararg) * stack[nargs] = ToObject(this) * stack[nargs+1] = ToUint32(length) */ DUK_ASSERT_TOP(thr, nargs + 2); /* Note: unshift() may operate on indices above unsigned 32-bit range * and the final length may be >= 2**32. However, we restrict the * final result to 32-bit range for practicality. */ if (len + (duk_uint32_t) nargs < len) { DUK_D(DUK_DPRINT("Array.prototype.unshift() would go beyond 32-bit length, throw")); DUK_DCERROR_RANGE_INVALID_LENGTH(thr); } i = len; while (i > 0) { DUK_ASSERT_TOP(thr, nargs + 2); i--; /* k+argCount-1; note that may be above 32-bit range */ if (duk_get_prop_index(thr, -2, (duk_uarridx_t) i)) { /* fromPresent = true */ /* [ ... ToObject(this) ToUint32(length) val ] */ duk_put_prop_index(thr, -3, (duk_uarridx_t) (i + (duk_uint32_t) nargs)); /* -> [ ... ToObject(this) ToUint32(length) ] */ } else { /* fromPresent = false */ /* [ ... ToObject(this) ToUint32(length) val ] */ duk_pop_undefined(thr); duk_del_prop_index(thr, -2, (duk_uarridx_t) (i + (duk_uint32_t) nargs)); /* -> [ ... ToObject(this) ToUint32(length) ] */ } DUK_ASSERT_TOP(thr, nargs + 2); } for (i = 0; i < (duk_uint32_t) nargs; i++) { DUK_ASSERT_TOP(thr, nargs + 2); duk_dup(thr, (duk_idx_t) i); /* -> [ ... ToObject(this) ToUint32(length) arg[i] ] */ duk_put_prop_index(thr, -3, (duk_uarridx_t) i); DUK_ASSERT_TOP(thr, nargs + 2); } DUK_ASSERT_TOP(thr, nargs + 2); duk_push_u32(thr, len + (duk_uint32_t) nargs); duk_dup_top(thr); /* -> [ ... ToObject(this) ToUint32(length) final_len final_len ] */ duk_put_prop_stridx_short(thr, -4, DUK_STRIDX_LENGTH); return 1; } /* * indexOf(), lastIndexOf() */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_indexof_shared(duk_hthread *thr) { duk_idx_t nargs; duk_int_t i, len; duk_int_t from_idx; duk_small_int_t idx_step = duk_get_current_magic(thr); /* idx_step is +1 for indexOf, -1 for lastIndexOf */ /* lastIndexOf() needs to be a vararg function because we must distinguish * between an undefined fromIndex and a "not given" fromIndex; indexOf() is * made vararg for symmetry although it doesn't strictly need to be. */ nargs = duk_get_top(thr); duk_set_top(thr, 2); /* XXX: must be able to represent -len */ len = (duk_int_t) duk__push_this_obj_len_u32_limited(thr); if (len == 0) { goto not_found; } /* Index clamping is a bit tricky, we must ensure that we'll only iterate * through elements that exist and that the specific requirements from E5.1 * Sections 15.4.4.14 and 15.4.4.15 are fulfilled; especially: * * - indexOf: clamp to [-len,len], negative handling -> [0,len], * if clamped result is len, for-loop bails out immediately * * - lastIndexOf: clamp to [-len-1, len-1], negative handling -> [-1, len-1], * if clamped result is -1, for-loop bails out immediately * * If fromIndex is not given, ToInteger(undefined) = 0, which is correct * for indexOf() but incorrect for lastIndexOf(). Hence special handling, * and why lastIndexOf() needs to be a vararg function. */ if (nargs >= 2) { /* indexOf: clamp fromIndex to [-len, len] * (if fromIndex == len, for-loop terminates directly) * * lastIndexOf: clamp fromIndex to [-len - 1, len - 1] * (if clamped to -len-1 -> fromIndex becomes -1, terminates for-loop directly) */ from_idx = duk_to_int_clamped(thr, 1, (idx_step > 0 ? -len : -len - 1), (idx_step > 0 ? len : len - 1)); if (from_idx < 0) { /* for lastIndexOf, result may be -1 (mark immediate termination) */ from_idx = len + from_idx; } } else { /* for indexOf, ToInteger(undefined) would be 0, i.e. correct, but * handle both indexOf and lastIndexOf specially here. */ if (idx_step > 0) { from_idx = 0; } else { from_idx = len - 1; } } /* stack[0] = searchElement * stack[1] = fromIndex * stack[2] = object * stack[3] = length (not needed, but not popped above) */ for (i = from_idx; i >= 0 && i < len; i += idx_step) { DUK_ASSERT_TOP(thr, 4); if (duk_get_prop_index(thr, 2, (duk_uarridx_t) i)) { DUK_ASSERT_TOP(thr, 5); if (duk_strict_equals(thr, 0, 4)) { duk_push_int(thr, i); return 1; } } duk_pop_unsafe(thr); } not_found: duk_push_int(thr, -1); return 1; } /* * every(), some(), forEach(), map(), filter() */ #define DUK__ITER_EVERY 0 #define DUK__ITER_SOME 1 #define DUK__ITER_FOREACH 2 #define DUK__ITER_MAP 3 #define DUK__ITER_FILTER 4 /* XXX: This helper is a bit awkward because the handling for the different iteration * callers is quite different. This now compiles to a bit less than 500 bytes, so with * 5 callers the net result is about 100 bytes / caller. */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_iter_shared(duk_hthread *thr) { duk_uint32_t len; duk_uint32_t i; duk_uarridx_t k; duk_bool_t bval; duk_small_int_t iter_type = duk_get_current_magic(thr); duk_uint32_t res_length = 0; /* each call this helper serves has nargs==2 */ DUK_ASSERT_TOP(thr, 2); len = duk__push_this_obj_len_u32(thr); duk_require_callable(thr, 0); /* if thisArg not supplied, behave as if undefined was supplied */ if (iter_type == DUK__ITER_MAP || iter_type == DUK__ITER_FILTER) { duk_push_array(thr); } else { duk_push_undefined(thr); } /* stack[0] = callback * stack[1] = thisArg * stack[2] = object * stack[3] = ToUint32(length) (unused, but avoid unnecessary pop) * stack[4] = result array (or undefined) */ k = 0; /* result index for filter() */ for (i = 0; i < len; i++) { DUK_ASSERT_TOP(thr, 5); if (!duk_get_prop_index(thr, 2, (duk_uarridx_t) i)) { /* For 'map' trailing missing elements don't invoke the * callback but count towards the result length. */ if (iter_type == DUK__ITER_MAP) { res_length = i + 1; } duk_pop_undefined(thr); continue; } /* The original value needs to be preserved for filter(), hence * this funny order. We can't re-get the value because of side * effects. */ duk_dup_0(thr); duk_dup_1(thr); duk_dup_m3(thr); duk_push_u32(thr, i); duk_dup_2(thr); /* [ ... val callback thisArg val i obj ] */ duk_call_method(thr, 3); /* -> [ ... val retval ] */ switch (iter_type) { case DUK__ITER_EVERY: bval = duk_to_boolean(thr, -1); if (!bval) { /* stack top contains 'false' */ return 1; } break; case DUK__ITER_SOME: bval = duk_to_boolean(thr, -1); if (bval) { /* stack top contains 'true' */ return 1; } break; case DUK__ITER_FOREACH: /* nop */ break; case DUK__ITER_MAP: duk_dup_top(thr); duk_xdef_prop_index_wec(thr, 4, (duk_uarridx_t) i); /* retval to result[i] */ res_length = i + 1; break; case DUK__ITER_FILTER: bval = duk_to_boolean(thr, -1); if (bval) { duk_dup_m2(thr); /* orig value */ duk_xdef_prop_index_wec(thr, 4, (duk_uarridx_t) k); k++; res_length = k; } break; default: DUK_UNREACHABLE(); break; } duk_pop_2_unsafe(thr); DUK_ASSERT_TOP(thr, 5); } switch (iter_type) { case DUK__ITER_EVERY: duk_push_true(thr); break; case DUK__ITER_SOME: duk_push_false(thr); break; case DUK__ITER_FOREACH: duk_push_undefined(thr); break; case DUK__ITER_MAP: case DUK__ITER_FILTER: DUK_ASSERT_TOP(thr, 5); DUK_ASSERT(duk_is_array(thr, -1)); /* topmost element is the result array already */ duk_push_u32(thr, res_length); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W); break; default: DUK_UNREACHABLE(); break; } return 1; } /* * reduce(), reduceRight() */ DUK_INTERNAL duk_ret_t duk_bi_array_prototype_reduce_shared(duk_hthread *thr) { duk_idx_t nargs; duk_bool_t have_acc; duk_uint32_t i, len; duk_small_int_t idx_step = duk_get_current_magic(thr); /* idx_step is +1 for reduce, -1 for reduceRight */ /* We're a varargs function because we need to detect whether * initialValue was given or not. */ nargs = duk_get_top(thr); DUK_DDD(DUK_DDDPRINT("nargs=%ld", (long) nargs)); duk_set_top(thr, 2); len = duk__push_this_obj_len_u32(thr); duk_require_callable(thr, 0); /* stack[0] = callback fn * stack[1] = initialValue * stack[2] = object (coerced this) * stack[3] = length (not needed, but not popped above) * stack[4] = accumulator */ have_acc = 0; if (nargs >= 2) { duk_dup_1(thr); have_acc = 1; } DUK_DDD(DUK_DDDPRINT("have_acc=%ld, acc=%!T", (long) have_acc, (duk_tval *) duk_get_tval(thr, 3))); /* For len == 0, i is initialized to len - 1 which underflows. * The condition (i < len) will then exit the for-loop on the * first round which is correct. Similarly, loop termination * happens by i underflowing. */ for (i = (idx_step >= 0 ? 0 : len - 1); i < len; /* i >= 0 would always be true */ i += (duk_uint32_t) idx_step) { DUK_DDD(DUK_DDDPRINT("i=%ld, len=%ld, have_acc=%ld, top=%ld, acc=%!T", (long) i, (long) len, (long) have_acc, (long) duk_get_top(thr), (duk_tval *) duk_get_tval(thr, 4))); DUK_ASSERT((have_acc && duk_get_top(thr) == 5) || (!have_acc && duk_get_top(thr) == 4)); if (!duk_has_prop_index(thr, 2, (duk_uarridx_t) i)) { continue; } if (!have_acc) { DUK_ASSERT_TOP(thr, 4); duk_get_prop_index(thr, 2, (duk_uarridx_t) i); have_acc = 1; DUK_ASSERT_TOP(thr, 5); } else { DUK_ASSERT_TOP(thr, 5); duk_dup_0(thr); duk_dup(thr, 4); duk_get_prop_index(thr, 2, (duk_uarridx_t) i); duk_push_u32(thr, i); duk_dup_2(thr); DUK_DDD(DUK_DDDPRINT("calling reduce function: func=%!T, prev=%!T, curr=%!T, idx=%!T, obj=%!T", (duk_tval *) duk_get_tval(thr, -5), (duk_tval *) duk_get_tval(thr, -4), (duk_tval *) duk_get_tval(thr, -3), (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); duk_call(thr, 4); DUK_DDD(DUK_DDDPRINT("-> result: %!T", (duk_tval *) duk_get_tval(thr, -1))); duk_replace(thr, 4); DUK_ASSERT_TOP(thr, 5); } } if (!have_acc) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } DUK_ASSERT_TOP(thr, 5); return 1; } #endif /* DUK_USE_ARRAY_BUILTIN */ /* automatic undefs */ #undef DUK__ARRAY_MID_JOIN_LIMIT #undef DUK__ITER_EVERY #undef DUK__ITER_FILTER #undef DUK__ITER_FOREACH #undef DUK__ITER_MAP #undef DUK__ITER_SOME /* * Boolean built-ins */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_BOOLEAN_BUILTIN) /* Shared helper to provide toString() and valueOf(). Checks 'this', gets * the primitive value to stack top, and optionally coerces with ToString(). */ DUK_INTERNAL duk_ret_t duk_bi_boolean_prototype_tostring_shared(duk_hthread *thr) { duk_tval *tv; duk_hobject *h; duk_small_int_t coerce_tostring = duk_get_current_magic(thr); /* XXX: there is room to use a shared helper here, many built-ins * check the 'this' type, and if it's an object, check its class, * then get its internal value, etc. */ duk_push_this(thr); tv = duk_get_tval(thr, -1); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_BOOLEAN(tv)) { goto type_ok; } else if (DUK_TVAL_IS_OBJECT(tv)) { h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_BOOLEAN) { duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_VALUE); DUK_ASSERT(duk_is_boolean(thr, -1)); goto type_ok; } } DUK_DCERROR_TYPE_INVALID_ARGS(thr); /* never here */ type_ok: if (coerce_tostring) { duk_to_string(thr, -1); } return 1; } DUK_INTERNAL duk_ret_t duk_bi_boolean_constructor(duk_hthread *thr) { duk_hobject *h_this; duk_to_boolean(thr, 0); if (duk_is_constructor_call(thr)) { /* XXX: helper; rely on Boolean.prototype as being non-writable, non-configurable */ duk_push_this(thr); h_this = duk_known_hobject(thr, -1); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_this) == thr->builtins[DUK_BIDX_BOOLEAN_PROTOTYPE]); DUK_HOBJECT_SET_CLASS_NUMBER(h_this, DUK_HOBJECT_CLASS_BOOLEAN); duk_dup_0(thr); /* -> [ val obj val ] */ duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE); /* XXX: proper flags? */ } /* unbalanced stack */ return 1; } #endif /* DUK_USE_BOOLEAN_BUILTIN */ /* * ES2015 TypedArray and Node.js Buffer built-ins */ /* #include duk_internal.h -> already included */ /* * Helpers for buffer handling, enabled with DUK_USE_BUFFEROBJECT_SUPPORT. */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) /* Map class number (minus DUK_HOBJECT_CLASS_BUFOBJ_MIN) to a bidx for the * default internal prototype. */ static const duk_uint8_t duk__buffer_proto_from_classnum[] = { DUK_BIDX_ARRAYBUFFER_PROTOTYPE, DUK_BIDX_DATAVIEW_PROTOTYPE, DUK_BIDX_INT8ARRAY_PROTOTYPE, DUK_BIDX_UINT8ARRAY_PROTOTYPE, DUK_BIDX_UINT8CLAMPEDARRAY_PROTOTYPE, DUK_BIDX_INT16ARRAY_PROTOTYPE, DUK_BIDX_UINT16ARRAY_PROTOTYPE, DUK_BIDX_INT32ARRAY_PROTOTYPE, DUK_BIDX_UINT32ARRAY_PROTOTYPE, DUK_BIDX_FLOAT32ARRAY_PROTOTYPE, DUK_BIDX_FLOAT64ARRAY_PROTOTYPE }; /* Map DUK_HBUFOBJ_ELEM_xxx to duk_hobject class number. * Sync with duk_hbufobj.h and duk_hobject.h. */ static const duk_uint8_t duk__buffer_class_from_elemtype[9] = { DUK_HOBJECT_CLASS_UINT8ARRAY, DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY, DUK_HOBJECT_CLASS_INT8ARRAY, DUK_HOBJECT_CLASS_UINT16ARRAY, DUK_HOBJECT_CLASS_INT16ARRAY, DUK_HOBJECT_CLASS_UINT32ARRAY, DUK_HOBJECT_CLASS_INT32ARRAY, DUK_HOBJECT_CLASS_FLOAT32ARRAY, DUK_HOBJECT_CLASS_FLOAT64ARRAY }; /* Map DUK_HBUFOBJ_ELEM_xxx to prototype object built-in index. * Sync with duk_hbufobj.h. */ static const duk_uint8_t duk__buffer_proto_from_elemtype[9] = { DUK_BIDX_UINT8ARRAY_PROTOTYPE, DUK_BIDX_UINT8CLAMPEDARRAY_PROTOTYPE, DUK_BIDX_INT8ARRAY_PROTOTYPE, DUK_BIDX_UINT16ARRAY_PROTOTYPE, DUK_BIDX_INT16ARRAY_PROTOTYPE, DUK_BIDX_UINT32ARRAY_PROTOTYPE, DUK_BIDX_INT32ARRAY_PROTOTYPE, DUK_BIDX_FLOAT32ARRAY_PROTOTYPE, DUK_BIDX_FLOAT64ARRAY_PROTOTYPE }; /* Map DUK__FLD_xxx to byte size. */ static const duk_uint8_t duk__buffer_nbytes_from_fldtype[6] = { 1, /* DUK__FLD_8BIT */ 2, /* DUK__FLD_16BIT */ 4, /* DUK__FLD_32BIT */ 4, /* DUK__FLD_FLOAT */ 8, /* DUK__FLD_DOUBLE */ 0 /* DUK__FLD_VARINT; not relevant here */ }; /* Bitfield for each DUK_HBUFOBJ_ELEM_xxx indicating which element types * are compatible with a blind byte copy for the TypedArray set() method (also * used for TypedArray constructor). Array index is target buffer elem type, * bitfield indicates compatible source types. The types must have same byte * size and they must be coercion compatible. */ #if !defined(DUK_USE_PREFER_SIZE) static duk_uint16_t duk__buffer_elemtype_copy_compatible[9] = { /* xxx -> DUK_HBUFOBJ_ELEM_UINT8 */ (1U << DUK_HBUFOBJ_ELEM_UINT8) | (1U << DUK_HBUFOBJ_ELEM_UINT8CLAMPED) | (1U << DUK_HBUFOBJ_ELEM_INT8), /* xxx -> DUK_HBUFOBJ_ELEM_UINT8CLAMPED * Note: INT8 is -not- copy compatible, e.g. -1 would coerce to 0x00. */ (1U << DUK_HBUFOBJ_ELEM_UINT8) | (1U << DUK_HBUFOBJ_ELEM_UINT8CLAMPED), /* xxx -> DUK_HBUFOBJ_ELEM_INT8 */ (1U << DUK_HBUFOBJ_ELEM_UINT8) | (1U << DUK_HBUFOBJ_ELEM_UINT8CLAMPED) | (1U << DUK_HBUFOBJ_ELEM_INT8), /* xxx -> DUK_HBUFOBJ_ELEM_UINT16 */ (1U << DUK_HBUFOBJ_ELEM_UINT16) | (1U << DUK_HBUFOBJ_ELEM_INT16), /* xxx -> DUK_HBUFOBJ_ELEM_INT16 */ (1U << DUK_HBUFOBJ_ELEM_UINT16) | (1U << DUK_HBUFOBJ_ELEM_INT16), /* xxx -> DUK_HBUFOBJ_ELEM_UINT32 */ (1U << DUK_HBUFOBJ_ELEM_UINT32) | (1U << DUK_HBUFOBJ_ELEM_INT32), /* xxx -> DUK_HBUFOBJ_ELEM_INT32 */ (1U << DUK_HBUFOBJ_ELEM_UINT32) | (1U << DUK_HBUFOBJ_ELEM_INT32), /* xxx -> DUK_HBUFOBJ_ELEM_FLOAT32 */ (1U << DUK_HBUFOBJ_ELEM_FLOAT32), /* xxx -> DUK_HBUFOBJ_ELEM_FLOAT64 */ (1U << DUK_HBUFOBJ_ELEM_FLOAT64) }; #endif /* !DUK_USE_PREFER_SIZE */ DUK_LOCAL duk_hbufobj *duk__hbufobj_promote_this(duk_hthread *thr) { duk_tval *tv_dst; duk_hbufobj *res; duk_push_this(thr); DUK_ASSERT(duk_is_buffer(thr, -1)); res = (duk_hbufobj *) duk_to_hobject(thr, -1); DUK_HBUFOBJ_ASSERT_VALID(res); DUK_DD(DUK_DDPRINT("promoted 'this' automatically to an ArrayBuffer: %!iT", duk_get_tval(thr, -1))); tv_dst = duk_get_borrowed_this_tval(thr); DUK_TVAL_SET_OBJECT_UPDREF(thr, tv_dst, (duk_hobject *) res); duk_pop(thr); return res; } #define DUK__BUFOBJ_FLAG_THROW (1 << 0) #define DUK__BUFOBJ_FLAG_PROMOTE (1 << 1) /* Shared helper. When DUK__BUFOBJ_FLAG_PROMOTE is given, the return value is * always a duk_hbufobj *. Without the flag the return value can also be a * plain buffer, and the caller must check for it using DUK_HEAPHDR_IS_BUFFER(). */ DUK_LOCAL duk_heaphdr *duk__getrequire_bufobj_this(duk_hthread *thr, duk_small_uint_t flags) { duk_tval *tv; duk_hbufobj *h_this; DUK_ASSERT(thr != NULL); tv = duk_get_borrowed_this_tval(thr); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_OBJECT(tv)) { h_this = (duk_hbufobj *) DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h_this != NULL); if (DUK_HOBJECT_IS_BUFOBJ((duk_hobject *) h_this)) { DUK_HBUFOBJ_ASSERT_VALID(h_this); return (duk_heaphdr *) h_this; } } else if (DUK_TVAL_IS_BUFFER(tv)) { if (flags & DUK__BUFOBJ_FLAG_PROMOTE) { /* Promote a plain buffer to a Uint8Array. This is very * inefficient but allows plain buffer to be used wherever an * Uint8Array is used with very small cost; hot path functions * like index read/write calls should provide direct buffer * support to avoid promotion. */ /* XXX: make this conditional to a flag if call sites need it? */ h_this = duk__hbufobj_promote_this(thr); DUK_ASSERT(h_this != NULL); DUK_HBUFOBJ_ASSERT_VALID(h_this); return (duk_heaphdr *) h_this; } else { /* XXX: ugly, share return pointer for duk_hbuffer. */ return (duk_heaphdr *) DUK_TVAL_GET_BUFFER(tv); } } if (flags & DUK__BUFOBJ_FLAG_THROW) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_BUFFER); DUK_WO_NORETURN(return NULL;); } return NULL; } /* Check that 'this' is a duk_hbufobj and return a pointer to it. */ DUK_LOCAL duk_hbufobj *duk__get_bufobj_this(duk_hthread *thr) { return (duk_hbufobj *) duk__getrequire_bufobj_this(thr, DUK__BUFOBJ_FLAG_PROMOTE); } /* Check that 'this' is a duk_hbufobj and return a pointer to it * (NULL if not). */ DUK_LOCAL duk_hbufobj *duk__require_bufobj_this(duk_hthread *thr) { return (duk_hbufobj *) duk__getrequire_bufobj_this(thr, DUK__BUFOBJ_FLAG_THROW | DUK__BUFOBJ_FLAG_PROMOTE); } /* Check that value is a duk_hbufobj and return a pointer to it. */ DUK_LOCAL duk_hbufobj *duk__require_bufobj_value(duk_hthread *thr, duk_idx_t idx) { duk_tval *tv; duk_hbufobj *h_obj; /* Don't accept relative indices now. */ DUK_ASSERT(idx >= 0); tv = duk_require_tval(thr, idx); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_OBJECT(tv)) { h_obj = (duk_hbufobj *) DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h_obj != NULL); if (DUK_HOBJECT_IS_BUFOBJ((duk_hobject *) h_obj)) { DUK_HBUFOBJ_ASSERT_VALID(h_obj); return h_obj; } } else if (DUK_TVAL_IS_BUFFER(tv)) { h_obj = (duk_hbufobj *) duk_to_hobject(thr, idx); DUK_ASSERT(h_obj != NULL); DUK_HBUFOBJ_ASSERT_VALID(h_obj); return h_obj; } DUK_ERROR_TYPE(thr, DUK_STR_NOT_BUFFER); DUK_WO_NORETURN(return NULL;); } DUK_LOCAL void duk__set_bufobj_buffer(duk_hthread *thr, duk_hbufobj *h_bufobj, duk_hbuffer *h_val) { DUK_ASSERT(thr != NULL); DUK_ASSERT(h_bufobj != NULL); DUK_ASSERT(h_bufobj->buf == NULL); /* no need to decref */ DUK_ASSERT(h_val != NULL); DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); DUK_UNREF(thr); h_bufobj->buf = h_val; DUK_HBUFFER_INCREF(thr, h_val); h_bufobj->length = (duk_uint_t) DUK_HBUFFER_GET_SIZE(h_val); DUK_ASSERT(h_bufobj->shift == 0); DUK_ASSERT(h_bufobj->elem_type == DUK_HBUFOBJ_ELEM_UINT8); DUK_ASSERT(h_bufobj->is_typedarray == 0); DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); } /* Shared offset/length coercion helper. */ DUK_LOCAL void duk__resolve_offset_opt_length(duk_hthread *thr, duk_hbufobj *h_bufarg, duk_idx_t idx_offset, duk_idx_t idx_length, duk_uint_t *out_offset, duk_uint_t *out_length, duk_bool_t throw_flag) { duk_int_t offset_signed; duk_int_t length_signed; duk_uint_t offset; duk_uint_t length; offset_signed = duk_to_int(thr, idx_offset); if (offset_signed < 0) { goto fail_range; } offset = (duk_uint_t) offset_signed; if (offset > h_bufarg->length) { goto fail_range; } DUK_ASSERT_DISABLE(offset >= 0); /* unsigned */ DUK_ASSERT(offset <= h_bufarg->length); if (duk_is_undefined(thr, idx_length)) { DUK_ASSERT(h_bufarg->length >= offset); length = h_bufarg->length - offset; /* >= 0 */ } else { length_signed = duk_to_int(thr, idx_length); if (length_signed < 0) { goto fail_range; } length = (duk_uint_t) length_signed; DUK_ASSERT(h_bufarg->length >= offset); if (length > h_bufarg->length - offset) { /* Unlike for negative arguments, some call sites * want length to be clamped if it's positive. */ if (throw_flag) { goto fail_range; } else { length = h_bufarg->length - offset; } } } DUK_ASSERT_DISABLE(length >= 0); /* unsigned */ DUK_ASSERT(offset + length <= h_bufarg->length); *out_offset = offset; *out_length = length; return; fail_range: DUK_ERROR_RANGE(thr, DUK_STR_INVALID_ARGS); DUK_WO_NORETURN(return;); } /* Shared lenient buffer length clamping helper. No negative indices, no * element/byte shifting. */ DUK_LOCAL void duk__clamp_startend_nonegidx_noshift(duk_hthread *thr, duk_int_t buffer_length, duk_idx_t idx_start, duk_idx_t idx_end, duk_int_t *out_start_offset, duk_int_t *out_end_offset) { duk_int_t start_offset; duk_int_t end_offset; DUK_ASSERT(out_start_offset != NULL); DUK_ASSERT(out_end_offset != NULL); /* undefined coerces to zero which is correct */ start_offset = duk_to_int_clamped(thr, idx_start, 0, buffer_length); if (duk_is_undefined(thr, idx_end)) { end_offset = buffer_length; } else { end_offset = duk_to_int_clamped(thr, idx_end, start_offset, buffer_length); } DUK_ASSERT(start_offset >= 0); DUK_ASSERT(start_offset <= buffer_length); DUK_ASSERT(end_offset >= 0); DUK_ASSERT(end_offset <= buffer_length); DUK_ASSERT(start_offset <= end_offset); *out_start_offset = start_offset; *out_end_offset = end_offset; } /* Shared lenient buffer length clamping helper. Indices are treated as * element indices (though output values are byte offsets) which only * really matters for TypedArray views as other buffer object have a zero * shift. Negative indices are counted from end of input slice; crossed * indices are clamped to zero length; and final indices are clamped * against input slice. Used for e.g. ArrayBuffer slice(). */ DUK_LOCAL void duk__clamp_startend_negidx_shifted(duk_hthread *thr, duk_int_t buffer_length, duk_uint8_t buffer_shift, duk_idx_t idx_start, duk_idx_t idx_end, duk_int_t *out_start_offset, duk_int_t *out_end_offset) { duk_int_t start_offset; duk_int_t end_offset; DUK_ASSERT(out_start_offset != NULL); DUK_ASSERT(out_end_offset != NULL); buffer_length >>= buffer_shift; /* as (full) elements */ /* Resolve start/end offset as element indices first; arguments * at idx_start/idx_end are element offsets. Working with element * indices first also avoids potential for wrapping. */ start_offset = duk_to_int(thr, idx_start); if (start_offset < 0) { start_offset = buffer_length + start_offset; } if (duk_is_undefined(thr, idx_end)) { end_offset = buffer_length; } else { end_offset = duk_to_int(thr, idx_end); if (end_offset < 0) { end_offset = buffer_length + end_offset; } } /* Note: start_offset/end_offset can still be < 0 here. */ if (start_offset < 0) { start_offset = 0; } else if (start_offset > buffer_length) { start_offset = buffer_length; } if (end_offset < start_offset) { end_offset = start_offset; } else if (end_offset > buffer_length) { end_offset = buffer_length; } DUK_ASSERT(start_offset >= 0); DUK_ASSERT(start_offset <= buffer_length); DUK_ASSERT(end_offset >= 0); DUK_ASSERT(end_offset <= buffer_length); DUK_ASSERT(start_offset <= end_offset); /* Convert indices to byte offsets. */ start_offset <<= buffer_shift; end_offset <<= buffer_shift; *out_start_offset = start_offset; *out_end_offset = end_offset; } DUK_INTERNAL void duk_hbufobj_promote_plain(duk_hthread *thr, duk_idx_t idx) { if (duk_is_buffer(thr, idx)) { duk_to_object(thr, idx); } } DUK_INTERNAL void duk_hbufobj_push_uint8array_from_plain(duk_hthread *thr, duk_hbuffer *h_buf) { /* Push Uint8Array which will share the same underlying buffer as * the plain buffer argument. Also create an ArrayBuffer with the * same backing for the result .buffer property. */ duk_push_hbuffer(thr, h_buf); duk_push_buffer_object(thr, -1, 0, (duk_size_t) DUK_HBUFFER_GET_SIZE(h_buf), DUK_BUFOBJ_UINT8ARRAY); duk_remove_m2(thr); #if 0 /* More verbose equivalent; maybe useful if e.g. .buffer is omitted. */ h_bufobj = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_UINT8ARRAY), DUK_BIDX_UINT8ARRAY_PROTOTYPE); DUK_ASSERT(h_bufobj != NULL); duk__set_bufobj_buffer(thr, h_bufobj, h_buf); h_bufobj->is_typedarray = 1; DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); h_arrbuf = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARRAYBUFFER), DUK_BIDX_ARRAYBUFFER_PROTOTYPE); DUK_ASSERT(h_arrbuf != NULL); duk__set_bufobj_buffer(thr, h_arrbuf, h_buf); DUK_ASSERT(h_arrbuf->is_typedarray == 0); DUK_HBUFOBJ_ASSERT_VALID(h_arrbuf); DUK_ASSERT(h_bufobj->buf_prop == NULL); h_bufobj->buf_prop = (duk_hobject *) h_arrbuf; DUK_ASSERT(h_arrbuf != NULL); DUK_HBUFOBJ_INCREF(thr, h_arrbuf); duk_pop(thr); #endif } /* Indexed read helper for buffer objects, also called from outside this file. */ DUK_INTERNAL void duk_hbufobj_push_validated_read(duk_hthread *thr, duk_hbufobj *h_bufobj, duk_uint8_t *p, duk_small_uint_t elem_size) { duk_double_union du; DUK_ASSERT(elem_size > 0); duk_memcpy((void *) du.uc, (const void *) p, (size_t) elem_size); switch (h_bufobj->elem_type) { case DUK_HBUFOBJ_ELEM_UINT8: case DUK_HBUFOBJ_ELEM_UINT8CLAMPED: duk_push_uint(thr, (duk_uint_t) du.uc[0]); break; case DUK_HBUFOBJ_ELEM_INT8: duk_push_int(thr, (duk_int_t) (duk_int8_t) du.uc[0]); break; case DUK_HBUFOBJ_ELEM_UINT16: duk_push_uint(thr, (duk_uint_t) du.us[0]); break; case DUK_HBUFOBJ_ELEM_INT16: duk_push_int(thr, (duk_int_t) (duk_int16_t) du.us[0]); break; case DUK_HBUFOBJ_ELEM_UINT32: duk_push_uint(thr, (duk_uint_t) du.ui[0]); break; case DUK_HBUFOBJ_ELEM_INT32: duk_push_int(thr, (duk_int_t) (duk_int32_t) du.ui[0]); break; case DUK_HBUFOBJ_ELEM_FLOAT32: duk_push_number(thr, (duk_double_t) du.f[0]); break; case DUK_HBUFOBJ_ELEM_FLOAT64: duk_push_number(thr, (duk_double_t) du.d); break; default: DUK_UNREACHABLE(); } } /* Indexed write helper for buffer objects, also called from outside this file. */ DUK_INTERNAL void duk_hbufobj_validated_write(duk_hthread *thr, duk_hbufobj *h_bufobj, duk_uint8_t *p, duk_small_uint_t elem_size) { duk_double_union du; /* NOTE! Caller must ensure that any side effects from the * coercions below are safe. If that cannot be guaranteed * (which is normally the case), caller must coerce the * argument using duk_to_number() before any pointer * validations; the result of duk_to_number() always coerces * without side effects here. */ switch (h_bufobj->elem_type) { case DUK_HBUFOBJ_ELEM_UINT8: du.uc[0] = (duk_uint8_t) duk_to_uint32(thr, -1); break; case DUK_HBUFOBJ_ELEM_UINT8CLAMPED: du.uc[0] = (duk_uint8_t) duk_to_uint8clamped(thr, -1); break; case DUK_HBUFOBJ_ELEM_INT8: du.uc[0] = (duk_uint8_t) duk_to_int32(thr, -1); break; case DUK_HBUFOBJ_ELEM_UINT16: du.us[0] = (duk_uint16_t) duk_to_uint32(thr, -1); break; case DUK_HBUFOBJ_ELEM_INT16: du.us[0] = (duk_uint16_t) duk_to_int32(thr, -1); break; case DUK_HBUFOBJ_ELEM_UINT32: du.ui[0] = (duk_uint32_t) duk_to_uint32(thr, -1); break; case DUK_HBUFOBJ_ELEM_INT32: du.ui[0] = (duk_uint32_t) duk_to_int32(thr, -1); break; case DUK_HBUFOBJ_ELEM_FLOAT32: /* A double-to-float cast is undefined behavior in C99 if * the cast is out-of-range, so use a helper. Example: * runtime error: value -1e+100 is outside the range of representable values of type 'float' */ du.f[0] = duk_double_to_float_t(duk_to_number_m1(thr)); break; case DUK_HBUFOBJ_ELEM_FLOAT64: du.d = (duk_double_t) duk_to_number_m1(thr); break; default: DUK_UNREACHABLE(); } DUK_ASSERT(elem_size > 0); duk_memcpy((void *) p, (const void *) du.uc, (size_t) elem_size); } /* Helper to create a fixed buffer from argument value at index 0. * Node.js and allocPlain() compatible. */ DUK_LOCAL duk_hbuffer *duk__hbufobj_fixed_from_argvalue(duk_hthread *thr) { duk_int_t len; duk_int_t i; duk_size_t buf_size; duk_uint8_t *buf; switch (duk_get_type(thr, 0)) { case DUK_TYPE_NUMBER: { len = duk_to_int_clamped(thr, 0, 0, DUK_INT_MAX); (void) duk_push_fixed_buffer_zero(thr, (duk_size_t) len); break; } case DUK_TYPE_BUFFER: { /* Treat like Uint8Array. */ goto slow_copy; } case DUK_TYPE_OBJECT: { duk_hobject *h; duk_hbufobj *h_bufobj; /* For Node.js Buffers "Passing an ArrayBuffer returns a Buffer * that shares allocated memory with the given ArrayBuffer." * https://nodejs.org/api/buffer.html#buffer_buffer_from_buffer_alloc_and_buffer_allocunsafe */ h = duk_known_hobject(thr, 0); if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAYBUFFER) { DUK_ASSERT(DUK_HOBJECT_IS_BUFOBJ(h)); h_bufobj = (duk_hbufobj *) h; if (DUK_UNLIKELY(h_bufobj->buf == NULL)) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return NULL;); } if (DUK_UNLIKELY(h_bufobj->offset != 0 || h_bufobj->length != DUK_HBUFFER_GET_SIZE(h_bufobj->buf))) { /* No support for ArrayBuffers with slice * offset/length. */ DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return NULL;); } duk_push_hbuffer(thr, h_bufobj->buf); return h_bufobj->buf; } goto slow_copy; } case DUK_TYPE_STRING: { /* ignore encoding for now */ duk_require_hstring_notsymbol(thr, 0); duk_dup_0(thr); (void) duk_to_buffer(thr, -1, &buf_size); break; } default: DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return NULL;); } done: DUK_ASSERT(duk_is_buffer(thr, -1)); return duk_known_hbuffer(thr, -1); slow_copy: /* XXX: fast path for typed arrays and other buffer objects? */ (void) duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_LENGTH); len = duk_to_int_clamped(thr, -1, 0, DUK_INT_MAX); duk_pop(thr); buf = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, (duk_size_t) len); /* no zeroing, all indices get initialized */ for (i = 0; i < len; i++) { /* XXX: fast path for array or buffer arguments? */ duk_get_prop_index(thr, 0, (duk_uarridx_t) i); buf[i] = (duk_uint8_t) (duk_to_uint32(thr, -1) & 0xffU); duk_pop(thr); } goto done; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer constructor * * Node.js Buffers are just Uint8Arrays with internal prototype set to * Buffer.prototype so they're handled otherwise the same as Uint8Array. * However, the constructor arguments are very different so a separate * constructor entry point is used. */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_constructor(duk_hthread *thr) { duk_hbuffer *h_buf; h_buf = duk__hbufobj_fixed_from_argvalue(thr); DUK_ASSERT(h_buf != NULL); duk_push_buffer_object(thr, -1, 0, DUK_HBUFFER_FIXED_GET_SIZE((duk_hbuffer_fixed *) (void *) h_buf), DUK_BUFOBJ_UINT8ARRAY); duk_push_hobject_bidx(thr, DUK_BIDX_NODEJS_BUFFER_PROTOTYPE); duk_set_prototype(thr, -2); /* XXX: a more direct implementation */ return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * ArrayBuffer, DataView, and TypedArray constructors */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_arraybuffer_constructor(duk_hthread *thr) { duk_hbufobj *h_bufobj; duk_hbuffer *h_val; duk_int_t len; DUK_CTX_ASSERT_VALID(thr); duk_require_constructor_call(thr); len = duk_to_int(thr, 0); if (len < 0) { goto fail_length; } (void) duk_push_fixed_buffer_zero(thr, (duk_size_t) len); h_val = (duk_hbuffer *) duk_known_hbuffer(thr, -1); h_bufobj = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARRAYBUFFER), DUK_BIDX_ARRAYBUFFER_PROTOTYPE); DUK_ASSERT(h_bufobj != NULL); duk__set_bufobj_buffer(thr, h_bufobj, h_val); DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); return 1; fail_length: DUK_DCERROR_RANGE_INVALID_LENGTH(thr); } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* Format of magic, bits: * 0...1: elem size shift (0-3) * 2...5: elem type (DUK_HBUFOBJ_ELEM_xxx) * * XXX: add prototype bidx explicitly to magic instead of using a mapping? */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_typedarray_constructor(duk_hthread *thr) { duk_tval *tv; duk_hobject *h_obj; duk_hbufobj *h_bufobj = NULL; duk_hbufobj *h_bufarg = NULL; duk_hbuffer *h_val; duk_small_uint_t magic; duk_small_uint_t shift; duk_small_uint_t elem_type; duk_small_uint_t elem_size; duk_small_uint_t class_num; duk_small_uint_t proto_bidx; duk_uint_t align_mask; duk_uint_t elem_length; duk_int_t elem_length_signed; duk_uint_t byte_length; duk_small_uint_t copy_mode; /* XXX: The same copy helpers could be shared with at least some * buffer functions. */ duk_require_constructor_call(thr); /* We could fit built-in index into magic but that'd make the magic * number dependent on built-in numbering (genbuiltins.py doesn't * handle that yet). So map both class and prototype from the * element type. */ magic = (duk_small_uint_t) duk_get_current_magic(thr); shift = magic & 0x03U; /* bits 0...1: shift */ elem_type = (magic >> 2) & 0x0fU; /* bits 2...5: type */ elem_size = 1U << shift; align_mask = elem_size - 1; DUK_ASSERT(elem_type < sizeof(duk__buffer_proto_from_elemtype) / sizeof(duk_uint8_t)); proto_bidx = duk__buffer_proto_from_elemtype[elem_type]; DUK_ASSERT(proto_bidx < DUK_NUM_BUILTINS); DUK_ASSERT(elem_type < sizeof(duk__buffer_class_from_elemtype) / sizeof(duk_uint8_t)); class_num = duk__buffer_class_from_elemtype[elem_type]; DUK_DD(DUK_DDPRINT("typedarray constructor, magic=%d, shift=%d, elem_type=%d, " "elem_size=%d, proto_bidx=%d, class_num=%d", (int) magic, (int) shift, (int) elem_type, (int) elem_size, (int) proto_bidx, (int) class_num)); /* Argument variants. When the argument is an ArrayBuffer a view to * the same buffer is created; otherwise a new ArrayBuffer is always * created. */ /* XXX: initial iteration to treat a plain buffer like an ArrayBuffer: * coerce to an ArrayBuffer object and use that as .buffer. The underlying * buffer will be the same but result .buffer !== inputPlainBuffer. */ duk_hbufobj_promote_plain(thr, 0); tv = duk_get_tval(thr, 0); DUK_ASSERT(tv != NULL); /* arg count */ if (DUK_TVAL_IS_OBJECT(tv)) { h_obj = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h_obj != NULL); if (DUK_HOBJECT_GET_CLASS_NUMBER(h_obj) == DUK_HOBJECT_CLASS_ARRAYBUFFER) { /* ArrayBuffer: unlike any other argument variant, create * a view into the existing buffer. */ duk_int_t byte_offset_signed; duk_uint_t byte_offset; h_bufarg = (duk_hbufobj *) h_obj; byte_offset_signed = duk_to_int(thr, 1); if (byte_offset_signed < 0) { goto fail_arguments; } byte_offset = (duk_uint_t) byte_offset_signed; if (byte_offset > h_bufarg->length || (byte_offset & align_mask) != 0) { /* Must be >= 0 and multiple of element size. */ goto fail_arguments; } if (duk_is_undefined(thr, 2)) { DUK_ASSERT(h_bufarg->length >= byte_offset); byte_length = h_bufarg->length - byte_offset; if ((byte_length & align_mask) != 0) { /* Must be element size multiple from * start offset to end of buffer. */ goto fail_arguments; } elem_length = (byte_length >> shift); } else { elem_length_signed = duk_to_int(thr, 2); if (elem_length_signed < 0) { goto fail_arguments; } elem_length = (duk_uint_t) elem_length_signed; byte_length = elem_length << shift; if ((byte_length >> shift) != elem_length) { /* Byte length would overflow. */ /* XXX: easier check with less code? */ goto fail_arguments; } DUK_ASSERT(h_bufarg->length >= byte_offset); if (byte_length > h_bufarg->length - byte_offset) { /* Not enough data. */ goto fail_arguments; } } DUK_UNREF(elem_length); DUK_ASSERT_DISABLE(byte_offset >= 0); DUK_ASSERT(byte_offset <= h_bufarg->length); DUK_ASSERT_DISABLE(byte_length >= 0); DUK_ASSERT(byte_offset + byte_length <= h_bufarg->length); DUK_ASSERT((elem_length << shift) == byte_length); h_bufobj = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(class_num), (duk_small_int_t) proto_bidx); h_val = h_bufarg->buf; if (h_val == NULL) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } h_bufobj->buf = h_val; DUK_HBUFFER_INCREF(thr, h_val); h_bufobj->offset = h_bufarg->offset + byte_offset; h_bufobj->length = byte_length; h_bufobj->shift = (duk_uint8_t) shift; h_bufobj->elem_type = (duk_uint8_t) elem_type; h_bufobj->is_typedarray = 1; DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); /* Set .buffer to the argument ArrayBuffer. */ DUK_ASSERT(h_bufobj->buf_prop == NULL); h_bufobj->buf_prop = (duk_hobject *) h_bufarg; DUK_ASSERT(h_bufarg != NULL); DUK_HBUFOBJ_INCREF(thr, h_bufarg); return 1; } else if (DUK_HOBJECT_IS_BUFOBJ(h_obj)) { /* TypedArray (or other non-ArrayBuffer duk_hbufobj). * Conceptually same behavior as for an Array-like argument, * with a few fast paths. */ h_bufarg = (duk_hbufobj *) h_obj; DUK_HBUFOBJ_ASSERT_VALID(h_bufarg); elem_length_signed = (duk_int_t) (h_bufarg->length >> h_bufarg->shift); if (h_bufarg->buf == NULL) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } /* Select copy mode. Must take into account element * compatibility and validity of the underlying source * buffer. */ DUK_DDD(DUK_DDDPRINT("selecting copy mode for bufobj arg, " "src byte_length=%ld, src shift=%d, " "src/dst elem_length=%ld; " "dst shift=%d -> dst byte_length=%ld", (long) h_bufarg->length, (int) h_bufarg->shift, (long) elem_length_signed, (int) shift, (long) (elem_length_signed << shift))); copy_mode = 2; /* default is explicit index read/write copy */ #if !defined(DUK_USE_PREFER_SIZE) /* With a size optimized build copy_mode 2 is enough. * Modes 0 and 1 are faster but conceptually the same. */ DUK_ASSERT(elem_type < sizeof(duk__buffer_elemtype_copy_compatible) / sizeof(duk_uint16_t)); if (DUK_HBUFOBJ_VALID_SLICE(h_bufarg)) { if ((duk__buffer_elemtype_copy_compatible[elem_type] & (1 << h_bufarg->elem_type)) != 0) { DUK_DDD(DUK_DDDPRINT("source/target are copy compatible, memcpy")); DUK_ASSERT(shift == h_bufarg->shift); /* byte sizes will match */ copy_mode = 0; } else { DUK_DDD(DUK_DDDPRINT("source/target not copy compatible but valid, fast copy")); copy_mode = 1; } } #endif /* !DUK_USE_PREFER_SIZE */ } else { /* Array or Array-like */ elem_length_signed = (duk_int_t) duk_get_length(thr, 0); copy_mode = 2; } } else { /* Non-object argument is simply int coerced, matches * V8 behavior (except for "null", which we coerce to * 0 but V8 TypeErrors). */ elem_length_signed = duk_to_int(thr, 0); copy_mode = 3; } if (elem_length_signed < 0) { goto fail_arguments; } elem_length = (duk_uint_t) elem_length_signed; byte_length = (duk_uint_t) (elem_length << shift); if ((byte_length >> shift) != elem_length) { /* Byte length would overflow. */ /* XXX: easier check with less code? */ goto fail_arguments; } DUK_DDD(DUK_DDDPRINT("elem_length=%ld, byte_length=%ld", (long) elem_length, (long) byte_length)); /* ArrayBuffer argument is handled specially above; the rest of the * argument variants are handled by shared code below. * * ArrayBuffer in h_bufobj->buf_prop is intentionally left unset. * It will be automatically created by the .buffer accessor on * first access. */ /* Push the resulting view object on top of a plain fixed buffer. */ (void) duk_push_fixed_buffer(thr, byte_length); h_val = duk_known_hbuffer(thr, -1); DUK_ASSERT(h_val != NULL); h_bufobj = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(class_num), (duk_small_int_t) proto_bidx); h_bufobj->buf = h_val; DUK_HBUFFER_INCREF(thr, h_val); DUK_ASSERT(h_bufobj->offset == 0); h_bufobj->length = byte_length; h_bufobj->shift = (duk_uint8_t) shift; h_bufobj->elem_type = (duk_uint8_t) elem_type; h_bufobj->is_typedarray = 1; DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); /* Copy values, the copy method depends on the arguments. * * Copy mode decision may depend on the validity of the underlying * buffer of the source argument; there must be no harmful side effects * from there to here for copy_mode to still be valid. */ DUK_DDD(DUK_DDDPRINT("copy mode: %d", (int) copy_mode)); switch (copy_mode) { /* Copy modes 0 and 1 can be omitted in size optimized build, * copy mode 2 handles them (but more slowly). */ #if !defined(DUK_USE_PREFER_SIZE) case 0: { /* Use byte copy. */ duk_uint8_t *p_src; duk_uint8_t *p_dst; DUK_ASSERT(h_bufobj != NULL); DUK_ASSERT(h_bufobj->buf != NULL); DUK_ASSERT(DUK_HBUFOBJ_VALID_SLICE(h_bufobj)); DUK_ASSERT(h_bufarg != NULL); DUK_ASSERT(h_bufarg->buf != NULL); DUK_ASSERT(DUK_HBUFOBJ_VALID_SLICE(h_bufarg)); p_dst = DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_bufobj); p_src = DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_bufarg); DUK_DDD(DUK_DDDPRINT("using memcpy: p_src=%p, p_dst=%p, byte_length=%ld", (void *) p_src, (void *) p_dst, (long) byte_length)); duk_memcpy_unsafe((void *) p_dst, (const void *) p_src, (size_t) byte_length); break; } case 1: { /* Copy values through direct validated reads and writes. */ duk_small_uint_t src_elem_size; duk_small_uint_t dst_elem_size; duk_uint8_t *p_src; duk_uint8_t *p_src_end; duk_uint8_t *p_dst; DUK_ASSERT(h_bufobj != NULL); DUK_ASSERT(h_bufobj->buf != NULL); DUK_ASSERT(DUK_HBUFOBJ_VALID_SLICE(h_bufobj)); DUK_ASSERT(h_bufarg != NULL); DUK_ASSERT(h_bufarg->buf != NULL); DUK_ASSERT(DUK_HBUFOBJ_VALID_SLICE(h_bufarg)); src_elem_size = (duk_small_uint_t) (1U << h_bufarg->shift); dst_elem_size = elem_size; p_src = DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_bufarg); p_dst = DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_bufobj); p_src_end = p_src + h_bufarg->length; DUK_DDD(DUK_DDDPRINT("using fast copy: p_src=%p, p_src_end=%p, p_dst=%p, " "src_elem_size=%d, dst_elem_size=%d", (void *) p_src, (void *) p_src_end, (void *) p_dst, (int) src_elem_size, (int) dst_elem_size)); while (p_src != p_src_end) { DUK_DDD(DUK_DDDPRINT("fast path per element copy loop: " "p_src=%p, p_src_end=%p, p_dst=%p", (void *) p_src, (void *) p_src_end, (void *) p_dst)); /* A validated read() is always a number, so it's write coercion * is always side effect free an won't invalidate pointers etc. */ duk_hbufobj_push_validated_read(thr, h_bufarg, p_src, src_elem_size); duk_hbufobj_validated_write(thr, h_bufobj, p_dst, dst_elem_size); duk_pop(thr); p_src += src_elem_size; p_dst += dst_elem_size; } break; } #endif /* !DUK_USE_PREFER_SIZE */ case 2: { /* Copy values by index reads and writes. Let virtual * property handling take care of coercion. */ duk_uint_t i; DUK_DDD(DUK_DDDPRINT("using slow copy")); for (i = 0; i < elem_length; i++) { duk_get_prop_index(thr, 0, (duk_uarridx_t) i); duk_put_prop_index(thr, -2, (duk_uarridx_t) i); } break; } default: case 3: { /* No copy, leave zero bytes in the buffer. There's no * ambiguity with Float32/Float64 because zero bytes also * represent 0.0. */ DUK_DDD(DUK_DDDPRINT("using no copy")); break; } } return 1; fail_arguments: DUK_DCERROR_RANGE_INVALID_ARGS(thr); } #else /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* When bufferobject support is disabled, new Uint8Array() could still be * supported to create a plain fixed buffer. Disabled for now. */ #if 0 DUK_INTERNAL duk_ret_t duk_bi_typedarray_constructor(duk_hthread *thr) { duk_int_t elem_length_signed; duk_uint_t byte_length; /* XXX: The same copy helpers could be shared with at least some * buffer functions. */ duk_require_constructor_call(thr); elem_length_signed = duk_require_int(thr, 0); if (elem_length_signed < 0) { goto fail_arguments; } byte_length = (duk_uint_t) elem_length_signed; (void) duk_push_fixed_buffer_zero(thr, (duk_size_t) byte_length); return 1; fail_arguments: DUK_DCERROR_RANGE_INVALID_ARGS(thr); } #endif /* 0 */ #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_dataview_constructor(duk_hthread *thr) { duk_hbufobj *h_bufarg; duk_hbufobj *h_bufobj; duk_hbuffer *h_val; duk_uint_t offset; duk_uint_t length; duk_require_constructor_call(thr); h_bufarg = duk__require_bufobj_value(thr, 0); DUK_ASSERT(h_bufarg != NULL); if (DUK_HOBJECT_GET_CLASS_NUMBER((duk_hobject *) h_bufarg) != DUK_HOBJECT_CLASS_ARRAYBUFFER) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } duk__resolve_offset_opt_length(thr, h_bufarg, 1, 2, &offset, &length, 1 /*throw_flag*/); DUK_ASSERT(offset <= h_bufarg->length); DUK_ASSERT(offset + length <= h_bufarg->length); h_bufobj = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DATAVIEW), DUK_BIDX_DATAVIEW_PROTOTYPE); h_val = h_bufarg->buf; if (h_val == NULL) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } h_bufobj->buf = h_val; DUK_HBUFFER_INCREF(thr, h_val); h_bufobj->offset = h_bufarg->offset + offset; h_bufobj->length = length; DUK_ASSERT(h_bufobj->shift == 0); DUK_ASSERT(h_bufobj->elem_type == DUK_HBUFOBJ_ELEM_UINT8); DUK_ASSERT(h_bufobj->is_typedarray == 0); DUK_ASSERT(h_bufobj->buf_prop == NULL); h_bufobj->buf_prop = (duk_hobject *) h_bufarg; DUK_ASSERT(h_bufarg != NULL); DUK_HBUFOBJ_INCREF(thr, h_bufarg); DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * ArrayBuffer.isView() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_arraybuffer_isview(duk_hthread *thr) { duk_hobject *h_obj; duk_bool_t ret = 0; if (duk_is_buffer(thr, 0)) { ret = 1; } else { h_obj = duk_get_hobject(thr, 0); if (h_obj != NULL && DUK_HOBJECT_IS_BUFOBJ(h_obj)) { /* DataView needs special casing: ArrayBuffer.isView() is * true, but ->is_typedarray is 0. */ ret = ((duk_hbufobj *) h_obj)->is_typedarray || (DUK_HOBJECT_GET_CLASS_NUMBER(h_obj) == DUK_HOBJECT_CLASS_DATAVIEW); } } duk_push_boolean(thr, ret); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Uint8Array.allocPlain() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_uint8array_allocplain(duk_hthread *thr) { duk__hbufobj_fixed_from_argvalue(thr); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Uint8Array.plainOf() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_uint8array_plainof(duk_hthread *thr) { duk_hbufobj *h_bufobj; #if !defined(DUK_USE_PREFER_SIZE) /* Avoid churn if argument is already a plain buffer. */ if (duk_is_buffer(thr, 0)) { return 1; } #endif /* Promotes plain buffers to ArrayBuffers, so for a plain buffer * argument we'll create a pointless temporary (but still work * correctly). */ h_bufobj = duk__require_bufobj_value(thr, 0); if (h_bufobj->buf == NULL) { duk_push_undefined(thr); } else { duk_push_hbuffer(thr, h_bufobj->buf); } return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer: toString([encoding], [start], [end]) */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_tostring(duk_hthread *thr) { duk_hbufobj *h_this; duk_int_t start_offset, end_offset; duk_uint8_t *buf_slice; duk_size_t slice_length; h_this = duk__get_bufobj_this(thr); if (h_this == NULL) { /* XXX: happens e.g. when evaluating: String(Buffer.prototype). */ duk_push_literal(thr, "[object Object]"); return 1; } DUK_HBUFOBJ_ASSERT_VALID(h_this); /* Ignore encoding for now. */ duk__clamp_startend_nonegidx_noshift(thr, (duk_int_t) h_this->length, 1 /*idx_start*/, 2 /*idx_end*/, &start_offset, &end_offset); slice_length = (duk_size_t) (end_offset - start_offset); buf_slice = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, slice_length); /* all bytes initialized below */ DUK_ASSERT(buf_slice != NULL); /* Neutered or uncovered, TypeError. */ if (h_this->buf == NULL || !DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h_this, (duk_size_t) start_offset + slice_length)) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } /* XXX: ideally we wouldn't make a copy but a view into the buffer for the * decoding process. Or the decoding helper could be changed to accept * the slice info (a buffer pointer is NOT a good approach because guaranteeing * its stability is difficult). */ DUK_ASSERT(DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h_this, (duk_size_t) start_offset + slice_length)); duk_memcpy_unsafe((void *) buf_slice, (const void *) (DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_this) + start_offset), (size_t) slice_length); /* Use the equivalent of: new TextEncoder().encode(this) to convert the * string. Result will be valid UTF-8; non-CESU-8 inputs are currently * interpreted loosely. Value stack convention is a bit odd for now. */ duk_replace(thr, 0); duk_set_top(thr, 1); return duk_textdecoder_decode_utf8_nodejs(thr); } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.prototype: toJSON() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_tojson(duk_hthread *thr) { duk_hbufobj *h_this; duk_uint8_t *buf; duk_uint_t i, n; duk_tval *tv; h_this = duk__require_bufobj_this(thr); DUK_ASSERT(h_this != NULL); if (h_this->buf == NULL || !DUK_HBUFOBJ_VALID_SLICE(h_this)) { /* Serialize uncovered backing buffer as a null; doesn't * really matter as long we're memory safe. */ duk_push_null(thr); return 1; } duk_push_object(thr); duk_push_hstring_stridx(thr, DUK_STRIDX_UC_BUFFER); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_TYPE); /* XXX: uninitialized would be OK */ DUK_ASSERT_DISABLE((duk_size_t) h_this->length <= (duk_size_t) DUK_UINT32_MAX); tv = duk_push_harray_with_size_outptr(thr, (duk_uint32_t) h_this->length); /* XXX: needs revision with >4G buffers */ DUK_ASSERT(!duk_is_bare_object(thr, -1)); DUK_ASSERT(h_this->buf != NULL); buf = DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_this); for (i = 0, n = h_this->length; i < n; i++) { DUK_TVAL_SET_U32(tv + i, (duk_uint32_t) buf[i]); /* no need for decref or incref */ } duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_DATA); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.prototype.equals() * Node.js Buffer.prototype.compare() * Node.js Buffer.compare() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_buffer_compare_shared(duk_hthread *thr) { duk_small_uint_t magic; duk_hbufobj *h_bufarg1; duk_hbufobj *h_bufarg2; duk_small_int_t comp_res; /* XXX: keep support for plain buffers and non-Node.js buffers? */ magic = (duk_small_uint_t) duk_get_current_magic(thr); if (magic & 0x02U) { /* Static call style. */ h_bufarg1 = duk__require_bufobj_value(thr, 0); h_bufarg2 = duk__require_bufobj_value(thr, 1); } else { h_bufarg1 = duk__require_bufobj_this(thr); h_bufarg2 = duk__require_bufobj_value(thr, 0); } DUK_ASSERT(h_bufarg1 != NULL); DUK_ASSERT(h_bufarg2 != NULL); /* We want to compare the slice/view areas of the arguments. * If either slice/view is invalid (underlying buffer is shorter) * ensure equals() is false, but otherwise the only thing that * matters is to be memory safe. */ if (DUK_HBUFOBJ_VALID_SLICE(h_bufarg1) && DUK_HBUFOBJ_VALID_SLICE(h_bufarg2)) { comp_res = duk_js_data_compare((const duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufarg1->buf) + h_bufarg1->offset, (const duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufarg2->buf) + h_bufarg2->offset, (duk_size_t) h_bufarg1->length, (duk_size_t) h_bufarg2->length); } else { comp_res = -1; /* either nonzero value is ok */ } if (magic & 0x01U) { /* compare: similar to string comparison but for buffer data. */ duk_push_int(thr, comp_res); } else { /* equals */ duk_push_boolean(thr, (comp_res == 0)); } return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.prototype.fill() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_fill(duk_hthread *thr) { duk_hbufobj *h_this; const duk_uint8_t *fill_str_ptr; duk_size_t fill_str_len; duk_uint8_t fill_value; duk_int_t fill_offset; duk_int_t fill_end; duk_size_t fill_length; duk_uint8_t *p; h_this = duk__require_bufobj_this(thr); DUK_ASSERT(h_this != NULL); if (h_this->buf == NULL) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } /* [ value offset end ] */ if (duk_is_string_notsymbol(thr, 0)) { fill_str_ptr = (const duk_uint8_t *) duk_get_lstring(thr, 0, &fill_str_len); DUK_ASSERT(fill_str_ptr != NULL); } else { /* Symbols get ToNumber() coerced and cause TypeError. */ fill_value = (duk_uint8_t) duk_to_uint32(thr, 0); fill_str_ptr = (const duk_uint8_t *) &fill_value; fill_str_len = 1; } /* Fill offset handling is more lenient than in Node.js. */ duk__clamp_startend_nonegidx_noshift(thr, (duk_int_t) h_this->length, 1 /*idx_start*/, 2 /*idx_end*/, &fill_offset, &fill_end); DUK_DDD(DUK_DDDPRINT("fill: fill_value=%02x, fill_offset=%ld, fill_end=%ld, view length=%ld", (unsigned int) fill_value, (long) fill_offset, (long) fill_end, (long) h_this->length)); DUK_ASSERT(fill_end - fill_offset >= 0); DUK_ASSERT(h_this->buf != NULL); p = (DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_this) + fill_offset); fill_length = (duk_size_t) (fill_end - fill_offset); if (fill_str_len == 1) { /* Handle single character fills as memset() even when * the fill data comes from a one-char argument. */ duk_memset_unsafe((void *) p, (int) fill_str_ptr[0], (size_t) fill_length); } else if (fill_str_len > 1) { duk_size_t i, n, t; for (i = 0, n = (duk_size_t) (fill_end - fill_offset), t = 0; i < n; i++) { p[i] = fill_str_ptr[t++]; if (t >= fill_str_len) { t = 0; } } } else { DUK_DDD(DUK_DDDPRINT("zero size fill pattern, ignore silently")); } /* Return the Buffer to allow chaining: b.fill(0x11).fill(0x22, 3, 5).toString() */ duk_push_this(thr); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.prototype.write(string, [offset], [length], [encoding]) */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_write(duk_hthread *thr) { duk_hbufobj *h_this; duk_uint_t offset; duk_uint_t length; const duk_uint8_t *str_data; duk_size_t str_len; /* XXX: very inefficient support for plain buffers */ h_this = duk__require_bufobj_this(thr); DUK_ASSERT(h_this != NULL); /* Argument must be a string, e.g. a buffer is not allowed. */ str_data = (const duk_uint8_t *) duk_require_lstring_notsymbol(thr, 0, &str_len); duk__resolve_offset_opt_length(thr, h_this, 1, 2, &offset, &length, 0 /*throw_flag*/); DUK_ASSERT(offset <= h_this->length); DUK_ASSERT(offset + length <= h_this->length); /* XXX: encoding is ignored now. */ if (length > str_len) { length = (duk_uint_t) str_len; } if (DUK_HBUFOBJ_VALID_SLICE(h_this)) { /* Cannot overlap. */ duk_memcpy_unsafe((void *) (DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_this) + offset), (const void *) str_data, (size_t) length); } else { DUK_DDD(DUK_DDDPRINT("write() target buffer is not covered, silent ignore")); } duk_push_uint(thr, length); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.prototype.copy() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_copy(duk_hthread *thr) { duk_hbufobj *h_this; duk_hbufobj *h_bufarg; duk_int_t source_length; duk_int_t target_length; duk_int_t target_start, source_start, source_end; duk_uint_t target_ustart, source_ustart, source_uend; duk_uint_t copy_size = 0; /* [ targetBuffer targetStart sourceStart sourceEnd ] */ h_this = duk__require_bufobj_this(thr); h_bufarg = duk__require_bufobj_value(thr, 0); DUK_ASSERT(h_this != NULL); DUK_ASSERT(h_bufarg != NULL); source_length = (duk_int_t) h_this->length; target_length = (duk_int_t) h_bufarg->length; target_start = duk_to_int(thr, 1); source_start = duk_to_int(thr, 2); if (duk_is_undefined(thr, 3)) { source_end = source_length; } else { source_end = duk_to_int(thr, 3); } DUK_DDD(DUK_DDDPRINT("checking copy args: target_start=%ld, target_length=%ld, " "source_start=%ld, source_end=%ld, source_length=%ld", (long) target_start, (long) h_bufarg->length, (long) source_start, (long) source_end, (long) source_length)); /* This behavior mostly mimics Node.js now. */ if (source_start < 0 || source_end < 0 || target_start < 0) { /* Negative offsets cause a RangeError. */ goto fail_bounds; } source_ustart = (duk_uint_t) source_start; source_uend = (duk_uint_t) source_end; target_ustart = (duk_uint_t) target_start; if (source_ustart >= source_uend || /* crossed offsets or zero size */ source_ustart >= (duk_uint_t) source_length || /* source out-of-bounds (but positive) */ target_ustart >= (duk_uint_t) target_length) { /* target out-of-bounds (but positive) */ goto silent_ignore; } if (source_uend >= (duk_uint_t) source_length) { /* Source end clamped silently to available length. */ source_uend = (duk_uint_t) source_length; } copy_size = source_uend - source_ustart; if (target_ustart + copy_size > (duk_uint_t) target_length) { /* Clamp to target's end if too long. * * NOTE: there's no overflow possibility in the comparison; * both target_ustart and copy_size are >= 0 and based on * values in duk_int_t range. Adding them as duk_uint_t * values is then guaranteed not to overflow. */ DUK_ASSERT(target_ustart + copy_size >= target_ustart); /* no overflow */ DUK_ASSERT(target_ustart + copy_size >= copy_size); /* no overflow */ copy_size = (duk_uint_t) target_length - target_ustart; } DUK_DDD(DUK_DDDPRINT("making copy: target_ustart=%lu source_ustart=%lu copy_size=%lu", (unsigned long) target_ustart, (unsigned long) source_ustart, (unsigned long) copy_size)); DUK_ASSERT(copy_size >= 1); DUK_ASSERT(source_ustart <= (duk_uint_t) source_length); DUK_ASSERT(source_ustart + copy_size <= (duk_uint_t) source_length); DUK_ASSERT(target_ustart <= (duk_uint_t) target_length); DUK_ASSERT(target_ustart + copy_size <= (duk_uint_t) target_length); /* Ensure copy is covered by underlying buffers. */ DUK_ASSERT(h_bufarg->buf != NULL); /* length check */ DUK_ASSERT(h_this->buf != NULL); /* length check */ if (DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h_bufarg, target_ustart + copy_size) && DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h_this, source_ustart + copy_size)) { /* Must use memmove() because copy area may overlap (source and target * buffer may be the same, or from different slices. */ duk_memmove_unsafe((void *) (DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_bufarg) + target_ustart), (const void *) (DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_this) + source_ustart), (size_t) copy_size); } else { DUK_DDD(DUK_DDDPRINT("buffer copy not covered by underlying buffer(s), ignoring")); } silent_ignore: /* Return value is like write(), number of bytes written. * The return value matters because of code like: * "off += buf.copy(...)". */ duk_push_uint(thr, copy_size); return 1; fail_bounds: DUK_DCERROR_RANGE_INVALID_ARGS(thr); } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * TypedArray.prototype.set() * * TypedArray set() is pretty interesting to implement because: * * - The source argument may be a plain array or a typedarray. If the * source is a TypedArray, values are decoded and re-encoded into the * target (not as a plain byte copy). This may happen even when the * element byte size is the same, e.g. integer values may be re-encoded * into floats. * * - Source and target may refer to the same underlying buffer, so that * the set() operation may overlap. The specification requires that this * must work as if a copy was made before the operation. Note that this * is NOT a simple memmove() situation because the source and target * byte sizes may be different -- e.g. a 4-byte source (Int8Array) may * expand to a 16-byte target (Uint32Array) so that the target overlaps * the source both from beginning and the end (unlike in typical memmove). * * - Even if 'buf' pointers of the source and target differ, there's no * guarantee that their memory areas don't overlap. This may be the * case with external buffers. * * Even so, it is nice to optimize for the common case: * * - Source and target separate buffers or non-overlapping. * * - Source and target have a compatible type so that a plain byte copy * is possible. Note that while e.g. uint8 and int8 are compatible * (coercion one way or another doesn't change the byte representation), * e.g. int8 and uint8clamped are NOT compatible when writing int8 * values into uint8clamped typedarray (-1 would clamp to 0 for instance). * * See test-bi-typedarray-proto-set.js. */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_typedarray_set(duk_hthread *thr) { duk_hbufobj *h_this; duk_hobject *h_obj; duk_uarridx_t i, n; duk_int_t offset_signed; duk_uint_t offset_elems; duk_uint_t offset_bytes; h_this = duk__require_bufobj_this(thr); DUK_ASSERT(h_this != NULL); DUK_HBUFOBJ_ASSERT_VALID(h_this); if (h_this->buf == NULL) { DUK_DDD(DUK_DDDPRINT("source neutered, skip copy")); return 0; } duk_hbufobj_promote_plain(thr, 0); h_obj = duk_require_hobject(thr, 0); /* XXX: V8 throws a TypeError for negative values. Would it * be more useful to interpret negative offsets here from the * end of the buffer too? */ offset_signed = duk_to_int(thr, 1); if (offset_signed < 0) { /* For some reason this is a TypeError (at least in V8). */ DUK_DCERROR_TYPE_INVALID_ARGS(thr); } offset_elems = (duk_uint_t) offset_signed; offset_bytes = offset_elems << h_this->shift; if ((offset_bytes >> h_this->shift) != offset_elems) { /* Byte length would overflow. */ /* XXX: easier check with less code? */ goto fail_args; } if (offset_bytes > h_this->length) { /* Equality may be OK but >length not. Checking * this explicitly avoids some overflow cases * below. */ goto fail_args; } DUK_ASSERT(offset_bytes <= h_this->length); /* Fast path: source is a TypedArray (or any bufobj). */ if (DUK_HOBJECT_IS_BUFOBJ(h_obj)) { duk_hbufobj *h_bufarg; #if !defined(DUK_USE_PREFER_SIZE) duk_uint16_t comp_mask; #endif duk_small_int_t no_overlap = 0; duk_uint_t src_length; duk_uint_t dst_length; duk_uint_t dst_length_elems; duk_uint8_t *p_src_base; duk_uint8_t *p_src_end; duk_uint8_t *p_src; duk_uint8_t *p_dst_base; duk_uint8_t *p_dst; duk_small_uint_t src_elem_size; duk_small_uint_t dst_elem_size; h_bufarg = (duk_hbufobj *) h_obj; DUK_HBUFOBJ_ASSERT_VALID(h_bufarg); if (h_bufarg->buf == NULL) { DUK_DDD(DUK_DDDPRINT("target neutered, skip copy")); return 0; } /* Nominal size check. */ src_length = h_bufarg->length; /* bytes in source */ dst_length_elems = (src_length >> h_bufarg->shift); /* elems in source and dest */ dst_length = dst_length_elems << h_this->shift; /* bytes in dest */ if ((dst_length >> h_this->shift) != dst_length_elems) { /* Byte length would overflow. */ /* XXX: easier check with less code? */ goto fail_args; } DUK_DDD(DUK_DDDPRINT("nominal size check: src_length=%ld, dst_length=%ld", (long) src_length, (long) dst_length)); DUK_ASSERT(offset_bytes <= h_this->length); if (dst_length > h_this->length - offset_bytes) { /* Overflow not an issue because subtraction is used on the right * side and guaranteed to be >= 0. */ DUK_DDD(DUK_DDDPRINT("copy exceeds target buffer nominal length")); goto fail_args; } if (!DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h_this, offset_bytes + dst_length)) { DUK_DDD(DUK_DDDPRINT("copy not covered by underlying target buffer, ignore")); return 0; } p_src_base = DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_bufarg); p_dst_base = DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_this) + offset_bytes; /* Check actual underlying buffers for validity and that they * cover the copy. No side effects are allowed after the check * so that the validity status doesn't change. */ if (!DUK_HBUFOBJ_VALID_SLICE(h_this) || !DUK_HBUFOBJ_VALID_SLICE(h_bufarg)) { /* The condition could be more narrow and check for the * copy area only, but there's no need for fine grained * behavior when the underlying buffer is misconfigured. */ DUK_DDD(DUK_DDDPRINT("source and/or target not covered by underlying buffer, skip copy")); return 0; } /* We want to do a straight memory copy if possible: this is * an important operation because .set() is the TypedArray * way to copy chunks of memory. However, because set() * conceptually works in terms of elements, not all views are * compatible with direct byte copying. * * If we do manage a direct copy, the "overlap issue" handled * below can just be solved using memmove() because the source * and destination element sizes are necessarily equal. */ #if !defined(DUK_USE_PREFER_SIZE) DUK_ASSERT(h_this->elem_type < sizeof(duk__buffer_elemtype_copy_compatible) / sizeof(duk_uint16_t)); comp_mask = duk__buffer_elemtype_copy_compatible[h_this->elem_type]; if (comp_mask & (1 << h_bufarg->elem_type)) { DUK_ASSERT(src_length == dst_length); DUK_DDD(DUK_DDDPRINT("fast path: able to use memmove() because views are compatible")); duk_memmove_unsafe((void *) p_dst_base, (const void *) p_src_base, (size_t) dst_length); return 0; } DUK_DDD(DUK_DDDPRINT("fast path: views are not compatible with a byte copy, copy by item")); #endif /* !DUK_USE_PREFER_SIZE */ /* We want to avoid making a copy to process set() but that's * not always possible: the source and the target may overlap * and because element sizes are different, the overlap cannot * always be handled with a memmove() or choosing the copy * direction in a certain way. For example, if source type is * uint8 and target type is uint32, the target area may exceed * the source area from both ends! * * Note that because external buffers may point to the same * memory areas, we must ultimately make this check using * pointers. * * NOTE: careful with side effects: any side effect may cause * a buffer resize (or external buffer pointer/length update)! */ DUK_DDD(DUK_DDDPRINT("overlap check: p_src_base=%p, src_length=%ld, " "p_dst_base=%p, dst_length=%ld", (void *) p_src_base, (long) src_length, (void *) p_dst_base, (long) dst_length)); if (p_src_base >= p_dst_base + dst_length || /* source starts after dest ends */ p_src_base + src_length <= p_dst_base) { /* source ends before dest starts */ no_overlap = 1; } if (!no_overlap) { /* There's overlap: the desired end result is that * conceptually a copy is made to avoid "trampling" * of source data by destination writes. We make * an actual temporary copy to handle this case. */ duk_uint8_t *p_src_copy; DUK_DDD(DUK_DDDPRINT("there is overlap, make a copy of the source")); p_src_copy = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, src_length); DUK_ASSERT(p_src_copy != NULL); duk_memcpy_unsafe((void *) p_src_copy, (const void *) p_src_base, (size_t) src_length); p_src_base = p_src_copy; /* use p_src_base from now on */ } /* Value stack intentionally mixed size here. */ DUK_DDD(DUK_DDDPRINT("after overlap check: p_src_base=%p, src_length=%ld, " "p_dst_base=%p, dst_length=%ld, valstack top=%ld", (void *) p_src_base, (long) src_length, (void *) p_dst_base, (long) dst_length, (long) duk_get_top(thr))); /* Ready to make the copy. We must proceed element by element * and must avoid any side effects that might cause the buffer * validity check above to become invalid. * * Although we work through the value stack here, only plain * numbers are handled which should be side effect safe. */ src_elem_size = (duk_small_uint_t) (1U << h_bufarg->shift); dst_elem_size = (duk_small_uint_t) (1U << h_this->shift); p_src = p_src_base; p_dst = p_dst_base; p_src_end = p_src_base + src_length; while (p_src != p_src_end) { DUK_DDD(DUK_DDDPRINT("fast path per element copy loop: " "p_src=%p, p_src_end=%p, p_dst=%p", (void *) p_src, (void *) p_src_end, (void *) p_dst)); /* A validated read() is always a number, so it's write coercion * is always side effect free an won't invalidate pointers etc. */ duk_hbufobj_push_validated_read(thr, h_bufarg, p_src, src_elem_size); duk_hbufobj_validated_write(thr, h_this, p_dst, dst_elem_size); duk_pop(thr); p_src += src_elem_size; p_dst += dst_elem_size; } return 0; } else { /* Slow path: quite slow, but we save space by using the property code * to write coerce target values. We don't need to worry about overlap * here because the source is not a TypedArray. * * We could use the bufobj write coercion helper but since the * property read may have arbitrary side effects, full validity checks * would be needed for every element anyway. */ n = (duk_uarridx_t) duk_get_length(thr, 0); DUK_ASSERT(offset_bytes <= h_this->length); if ((n << h_this->shift) > h_this->length - offset_bytes) { /* Overflow not an issue because subtraction is used on the right * side and guaranteed to be >= 0. */ DUK_DDD(DUK_DDDPRINT("copy exceeds target buffer nominal length")); goto fail_args; } /* There's no need to check for buffer validity status for the * target here: the property access code will do that for each * element. Moreover, if we did check the validity here, side * effects from reading the source argument might invalidate * the results anyway. */ DUK_ASSERT_TOP(thr, 2); duk_push_this(thr); for (i = 0; i < n; i++) { duk_get_prop_index(thr, 0, i); duk_put_prop_index(thr, 2, offset_elems + i); } } return 0; fail_args: DUK_DCERROR_RANGE_INVALID_ARGS(thr); } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.prototype.slice([start], [end]) * ArrayBuffer.prototype.slice(begin, [end]) * TypedArray.prototype.subarray(begin, [end]) * * The API calls are almost identical; negative indices are counted from end * of buffer, and final indices are clamped (allowing crossed indices). Main * differences: * * - Copy/view behavior; Node.js .slice() and TypedArray .subarray() create * views, ArrayBuffer .slice() creates a copy * * - Resulting object has a different class and prototype depending on the * call (or 'this' argument) * * - TypedArray .subarray() arguments are element indices, not byte offsets * * - Plain buffer argument creates a plain buffer slice */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_LOCAL void duk__arraybuffer_plain_slice(duk_hthread *thr, duk_hbuffer *h_val) { duk_int_t start_offset, end_offset; duk_uint_t slice_length; duk_uint8_t *p_copy; duk_size_t copy_length; duk__clamp_startend_negidx_shifted(thr, (duk_int_t) DUK_HBUFFER_GET_SIZE(h_val), 0 /*buffer_shift*/, 0 /*idx_start*/, 1 /*idx_end*/, &start_offset, &end_offset); DUK_ASSERT(end_offset <= (duk_int_t) DUK_HBUFFER_GET_SIZE(h_val)); DUK_ASSERT(start_offset >= 0); DUK_ASSERT(end_offset >= start_offset); slice_length = (duk_uint_t) (end_offset - start_offset); p_copy = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, (duk_size_t) slice_length); DUK_ASSERT(p_copy != NULL); copy_length = slice_length; duk_memcpy_unsafe((void *) p_copy, (const void *) ((duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_val) + start_offset), copy_length); } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) /* Shared helper for slice/subarray operation. * Magic: 0x01=isView, 0x02=copy, 0x04=Node.js Buffer special handling. */ DUK_INTERNAL duk_ret_t duk_bi_buffer_slice_shared(duk_hthread *thr) { duk_small_int_t magic; duk_small_uint_t res_class_num; duk_small_int_t res_proto_bidx; duk_hbufobj *h_this; duk_hbufobj *h_bufobj; duk_hbuffer *h_val; duk_int_t start_offset, end_offset; duk_uint_t slice_length; duk_tval *tv; /* [ start end ] */ magic = duk_get_current_magic(thr); tv = duk_get_borrowed_this_tval(thr); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_BUFFER(tv)) { /* For plain buffers return a plain buffer slice. */ h_val = DUK_TVAL_GET_BUFFER(tv); DUK_ASSERT(h_val != NULL); if (magic & 0x02) { /* Make copy: ArrayBuffer.prototype.slice() uses this. */ duk__arraybuffer_plain_slice(thr, h_val); return 1; } else { /* View into existing buffer: cannot be done if the * result is a plain buffer because there's no slice * info. So return an ArrayBuffer instance; coerce * the 'this' binding into an object and behave as if * the original call was for an Object-coerced plain * buffer (handled automatically by duk__require_bufobj_this()). */ DUK_DDD(DUK_DDDPRINT("slice() doesn't handle view into plain buffer, coerce 'this' to ArrayBuffer object")); /* fall through */ } } tv = NULL; /* No longer valid nor needed. */ h_this = duk__require_bufobj_this(thr); /* Slice offsets are element (not byte) offsets, which only matters * for TypedArray views, Node.js Buffer and ArrayBuffer have shift * zero so byte and element offsets are the same. Negative indices * are counted from end of slice, crossed indices are allowed (and * result in zero length result), and final values are clamped * against the current slice. There's intentionally no check * against the underlying buffer here. */ duk__clamp_startend_negidx_shifted(thr, (duk_int_t) h_this->length, (duk_uint8_t) h_this->shift, 0 /*idx_start*/, 1 /*idx_end*/, &start_offset, &end_offset); DUK_ASSERT(end_offset >= start_offset); DUK_ASSERT(start_offset >= 0); DUK_ASSERT(end_offset >= 0); slice_length = (duk_uint_t) (end_offset - start_offset); /* The resulting buffer object gets the same class and prototype as * the buffer in 'this', e.g. if the input is a Uint8Array the * result is a Uint8Array; if the input is a Float32Array, the * result is a Float32Array. The result internal prototype should * be the default prototype for the class (e.g. initial value of * Uint8Array.prototype), not copied from the argument (Duktape 1.x * did that). * * Node.js Buffers have special handling: they're Uint8Arrays as far * as the internal class is concerned, so the new Buffer should also * be an Uint8Array but inherit from Buffer.prototype. */ res_class_num = DUK_HOBJECT_GET_CLASS_NUMBER((duk_hobject *) h_this); DUK_ASSERT(res_class_num >= DUK_HOBJECT_CLASS_BUFOBJ_MIN); /* type check guarantees */ DUK_ASSERT(res_class_num <= DUK_HOBJECT_CLASS_BUFOBJ_MAX); res_proto_bidx = duk__buffer_proto_from_classnum[res_class_num - DUK_HOBJECT_CLASS_BUFOBJ_MIN]; if (magic & 0x04) { res_proto_bidx = DUK_BIDX_NODEJS_BUFFER_PROTOTYPE; } h_bufobj = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(res_class_num), res_proto_bidx); DUK_ASSERT(h_bufobj != NULL); DUK_ASSERT(h_bufobj->length == 0); h_bufobj->shift = h_this->shift; /* inherit */ h_bufobj->elem_type = h_this->elem_type; /* inherit */ h_bufobj->is_typedarray = magic & 0x01; DUK_ASSERT(h_bufobj->is_typedarray == 0 || h_bufobj->is_typedarray == 1); h_val = h_this->buf; if (h_val == NULL) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } if (magic & 0x02) { /* non-zero: make copy */ duk_uint8_t *p_copy; duk_size_t copy_length; p_copy = (duk_uint8_t *) duk_push_fixed_buffer_zero(thr, (duk_size_t) slice_length); /* must be zeroed, not all bytes always copied */ DUK_ASSERT(p_copy != NULL); /* Copy slice, respecting underlying buffer limits; remainder * is left as zero. */ copy_length = DUK_HBUFOBJ_CLAMP_BYTELENGTH(h_this, slice_length); duk_memcpy_unsafe((void *) p_copy, (const void *) (DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_this) + start_offset), copy_length); h_val = duk_known_hbuffer(thr, -1); h_bufobj->buf = h_val; DUK_HBUFFER_INCREF(thr, h_val); h_bufobj->length = slice_length; DUK_ASSERT(h_bufobj->offset == 0); duk_pop(thr); /* reachable so pop OK */ } else { h_bufobj->buf = h_val; DUK_HBUFFER_INCREF(thr, h_val); h_bufobj->length = slice_length; h_bufobj->offset = h_this->offset + (duk_uint_t) start_offset; /* Copy the .buffer property, needed for TypedArray.prototype.subarray(). * * XXX: limit copy only for TypedArray classes specifically? */ DUK_ASSERT(h_bufobj->buf_prop == NULL); h_bufobj->buf_prop = h_this->buf_prop; /* may be NULL */ DUK_HOBJECT_INCREF_ALLOWNULL(thr, (duk_hobject *) h_bufobj->buf_prop); } /* unbalanced stack on purpose */ DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.isEncoding() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_is_encoding(duk_hthread *thr) { const char *encoding; /* only accept lowercase 'utf8' now. */ encoding = duk_to_string(thr, 0); DUK_ASSERT(duk_is_string(thr, 0)); /* guaranteed by duk_to_string() */ duk_push_boolean(thr, DUK_STRCMP(encoding, "utf8") == 0); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.isBuffer() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_is_buffer(duk_hthread *thr) { duk_hobject *h; duk_hobject *h_proto; duk_bool_t ret = 0; DUK_ASSERT(duk_get_top(thr) >= 1); /* nargs */ h = duk_get_hobject(thr, 0); if (h != NULL) { h_proto = thr->builtins[DUK_BIDX_NODEJS_BUFFER_PROTOTYPE]; DUK_ASSERT(h_proto != NULL); h = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h); if (h != NULL) { ret = duk_hobject_prototype_chain_contains(thr, h, h_proto, 0 /*ignore_loop*/); } } duk_push_boolean(thr, ret); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.byteLength() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_byte_length(duk_hthread *thr) { const char *str; duk_size_t len; /* At the moment Buffer() will just use the string bytes as * is (ignoring encoding), so we return the string length here * unconditionally. */ /* XXX: to be revised; Old Node.js behavior just coerces any buffer * values to string: * $ node * > Buffer.byteLength(new Uint32Array(10)) * 20 * > Buffer.byteLength(new Uint32Array(100)) * 20 * (The 20 comes from '[object Uint32Array]'.length */ str = duk_to_lstring(thr, 0, &len); DUK_UNREF(str); duk_push_size_t(thr, len); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Node.js Buffer.concat() */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_concat(duk_hthread *thr) { duk_hobject *h_arg; duk_uint_t total_length; duk_hbufobj *h_bufobj; duk_hbufobj *h_bufres; duk_hbuffer *h_val; duk_uint_t i, n; duk_uint8_t *p; duk_size_t space_left; duk_size_t copy_size; /* Node.js accepts only actual Arrays. */ h_arg = duk_require_hobject(thr, 0); if (DUK_HOBJECT_GET_CLASS_NUMBER(h_arg) != DUK_HOBJECT_CLASS_ARRAY) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } /* Compute result length and validate argument buffers. */ n = (duk_uint_t) duk_get_length(thr, 0); total_length = 0; for (i = 0; i < n; i++) { /* Neutered checks not necessary here: neutered buffers have * zero 'length' so we'll effectively skip them. */ DUK_ASSERT_TOP(thr, 2); /* [ array totalLength ] */ duk_get_prop_index(thr, 0, (duk_uarridx_t) i); /* -> [ array totalLength buf ] */ h_bufobj = duk__require_bufobj_value(thr, 2); DUK_ASSERT(h_bufobj != NULL); total_length += h_bufobj->length; if (DUK_UNLIKELY(total_length < h_bufobj->length)) { DUK_DCERROR_RANGE_INVALID_ARGS(thr); /* Wrapped. */ } duk_pop(thr); } /* In Node.js v0.12.1 a 1-element array is special and won't create a * copy, this was fixed later so an explicit check no longer needed. */ /* User totalLength overrides a computed length, but we'll check * every copy in the copy loop. Note that duk_to_int() can * technically have arbitrary side effects so we need to recheck * the buffers in the copy loop. */ if (!duk_is_undefined(thr, 1) && n > 0) { /* For n == 0, Node.js ignores totalLength argument and * returns a zero length buffer. */ duk_int_t total_length_signed; total_length_signed = duk_to_int(thr, 1); if (total_length_signed < 0) { DUK_DCERROR_RANGE_INVALID_ARGS(thr); } total_length = (duk_uint_t) total_length_signed; } h_bufres = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_UINT8ARRAY), DUK_BIDX_NODEJS_BUFFER_PROTOTYPE); DUK_ASSERT(h_bufres != NULL); p = (duk_uint8_t *) duk_push_fixed_buffer_zero(thr, total_length); /* must be zeroed, all bytes not necessarily written over */ DUK_ASSERT(p != NULL); space_left = (duk_size_t) total_length; for (i = 0; i < n; i++) { DUK_ASSERT_TOP(thr, 4); /* [ array totalLength bufres buf ] */ duk_get_prop_index(thr, 0, (duk_uarridx_t) i); h_bufobj = duk__require_bufobj_value(thr, 4); DUK_ASSERT(h_bufobj != NULL); copy_size = h_bufobj->length; if (copy_size > space_left) { copy_size = space_left; } if (h_bufobj->buf != NULL && DUK_HBUFOBJ_VALID_SLICE(h_bufobj)) { duk_memcpy_unsafe((void *) p, (const void *) DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_bufobj), copy_size); } else { /* Just skip, leaving zeroes in the result. */ ; } p += copy_size; space_left -= copy_size; duk_pop(thr); } h_val = duk_known_hbuffer(thr, -1); duk__set_bufobj_buffer(thr, h_bufres, h_val); h_bufres->is_typedarray = 1; DUK_HBUFOBJ_ASSERT_VALID(h_bufres); duk_pop(thr); /* pop plain buffer, now reachable through h_bufres */ return 1; /* return h_bufres */ } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Shared readfield and writefield methods * * The readfield/writefield methods need support for endianness and field * types. All offsets are byte based so no offset shifting is needed. */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) /* Format of magic, bits: * 0...1: field type; 0=uint8, 1=uint16, 2=uint32, 3=float, 4=double, 5=unused, 6=unused, 7=unused * 3: endianness: 0=little, 1=big * 4: signed: 1=yes, 0=no * 5: typedarray: 1=yes, 0=no */ #define DUK__FLD_8BIT 0 #define DUK__FLD_16BIT 1 #define DUK__FLD_32BIT 2 #define DUK__FLD_FLOAT 3 #define DUK__FLD_DOUBLE 4 #define DUK__FLD_VARINT 5 #define DUK__FLD_BIGENDIAN (1 << 3) #define DUK__FLD_SIGNED (1 << 4) #define DUK__FLD_TYPEDARRAY (1 << 5) /* XXX: split into separate functions for each field type? */ DUK_INTERNAL duk_ret_t duk_bi_buffer_readfield(duk_hthread *thr) { duk_small_int_t magic = (duk_small_int_t) duk_get_current_magic(thr); duk_small_int_t magic_ftype; duk_small_int_t magic_bigendian; duk_small_int_t magic_signed; duk_small_int_t magic_typedarray; duk_small_int_t endswap; duk_hbufobj *h_this; duk_bool_t no_assert; duk_int_t offset_signed; duk_uint_t offset; duk_uint_t buffer_length; duk_uint_t check_length; duk_uint8_t *buf; duk_double_union du; magic_ftype = magic & 0x0007; magic_bigendian = magic & 0x0008; magic_signed = magic & 0x0010; magic_typedarray = magic & 0x0020; h_this = duk__require_bufobj_this(thr); /* XXX: very inefficient for plain buffers */ DUK_ASSERT(h_this != NULL); buffer_length = h_this->length; /* [ offset noAssert ], when ftype != DUK__FLD_VARINT */ /* [ offset fieldByteLength noAssert ], when ftype == DUK__FLD_VARINT */ /* [ offset littleEndian ], when DUK__FLD_TYPEDARRAY (regardless of ftype) */ /* Handle TypedArray vs. Node.js Buffer arg differences */ if (magic_typedarray) { no_assert = 0; #if defined(DUK_USE_INTEGER_LE) endswap = !duk_to_boolean(thr, 1); /* 1=little endian */ #else endswap = duk_to_boolean(thr, 1); /* 1=little endian */ #endif } else { no_assert = duk_to_boolean(thr, (magic_ftype == DUK__FLD_VARINT) ? 2 : 1); #if defined(DUK_USE_INTEGER_LE) endswap = magic_bigendian; #else endswap = !magic_bigendian; #endif } /* Offset is coerced first to signed integer range and then to unsigned. * This ensures we can add a small byte length (1-8) to the offset in * bound checks and not wrap. */ offset_signed = duk_to_int(thr, 0); offset = (duk_uint_t) offset_signed; if (offset_signed < 0) { goto fail_bounds; } DUK_DDD(DUK_DDDPRINT("readfield, buffer_length=%ld, offset=%ld, no_assert=%d, " "magic=%04x, magic_fieldtype=%d, magic_bigendian=%d, magic_signed=%d, " "endswap=%d", (long) buffer_length, (long) offset, (int) no_assert, (unsigned int) magic, (int) magic_ftype, (int) (magic_bigendian >> 3), (int) (magic_signed >> 4), (int) endswap)); /* Update 'buffer_length' to be the effective, safe limit which * takes into account the underlying buffer. This value will be * potentially invalidated by any side effect. */ check_length = DUK_HBUFOBJ_CLAMP_BYTELENGTH(h_this, buffer_length); DUK_DDD(DUK_DDDPRINT("buffer_length=%ld, check_length=%ld", (long) buffer_length, (long) check_length)); if (h_this->buf) { buf = DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_this); } else { /* Neutered. We could go into the switch-case safely with * buf == NULL because check_length == 0. To avoid scanbuild * warnings, fail directly instead. */ DUK_ASSERT(check_length == 0); goto fail_neutered; } DUK_ASSERT(buf != NULL); switch (magic_ftype) { case DUK__FLD_8BIT: { duk_uint8_t tmp; if (offset + 1U > check_length) { goto fail_bounds; } tmp = buf[offset]; if (magic_signed) { duk_push_int(thr, (duk_int_t) ((duk_int8_t) tmp)); } else { duk_push_uint(thr, (duk_uint_t) tmp); } break; } case DUK__FLD_16BIT: { duk_uint16_t tmp; if (offset + 2U > check_length) { goto fail_bounds; } duk_memcpy((void *) du.uc, (const void *) (buf + offset), 2); tmp = du.us[0]; if (endswap) { tmp = DUK_BSWAP16(tmp); } if (magic_signed) { duk_push_int(thr, (duk_int_t) ((duk_int16_t) tmp)); } else { duk_push_uint(thr, (duk_uint_t) tmp); } break; } case DUK__FLD_32BIT: { duk_uint32_t tmp; if (offset + 4U > check_length) { goto fail_bounds; } duk_memcpy((void *) du.uc, (const void *) (buf + offset), 4); tmp = du.ui[0]; if (endswap) { tmp = DUK_BSWAP32(tmp); } if (magic_signed) { duk_push_int(thr, (duk_int_t) ((duk_int32_t) tmp)); } else { duk_push_uint(thr, (duk_uint_t) tmp); } break; } case DUK__FLD_FLOAT: { duk_uint32_t tmp; if (offset + 4U > check_length) { goto fail_bounds; } duk_memcpy((void *) du.uc, (const void *) (buf + offset), 4); if (endswap) { tmp = du.ui[0]; tmp = DUK_BSWAP32(tmp); du.ui[0] = tmp; } duk_push_number(thr, (duk_double_t) du.f[0]); break; } case DUK__FLD_DOUBLE: { if (offset + 8U > check_length) { goto fail_bounds; } duk_memcpy((void *) du.uc, (const void *) (buf + offset), 8); if (endswap) { DUK_DBLUNION_BSWAP64(&du); } duk_push_number(thr, (duk_double_t) du.d); break; } case DUK__FLD_VARINT: { /* Node.js Buffer variable width integer field. We don't really * care about speed here, so aim for shortest algorithm. */ duk_int_t field_bytelen; duk_int_t i, i_step, i_end; #if defined(DUK_USE_64BIT_OPS) duk_int64_t tmp; duk_small_uint_t shift_tmp; #else duk_double_t tmp; duk_small_int_t highbyte; #endif const duk_uint8_t *p; field_bytelen = duk_get_int(thr, 1); /* avoid side effects! */ if (field_bytelen < 1 || field_bytelen > 6) { goto fail_field_length; } if (offset + (duk_uint_t) field_bytelen > check_length) { goto fail_bounds; } p = (const duk_uint8_t *) (buf + offset); /* Slow gathering of value using either 64-bit arithmetic * or IEEE doubles if 64-bit types not available. Handling * of negative numbers is a bit non-obvious in both cases. */ if (magic_bigendian) { /* Gather in big endian */ i = 0; i_step = 1; i_end = field_bytelen; /* one i_step over */ } else { /* Gather in little endian */ i = field_bytelen - 1; i_step = -1; i_end = -1; /* one i_step over */ } #if defined(DUK_USE_64BIT_OPS) tmp = 0; do { DUK_ASSERT(i >= 0 && i < field_bytelen); tmp = (tmp << 8) + (duk_int64_t) p[i]; i += i_step; } while (i != i_end); if (magic_signed) { /* Shift to sign extend. Left shift must be unsigned * to avoid undefined behavior; right shift must be * signed to sign extend properly. */ shift_tmp = (duk_small_uint_t) (64U - (duk_small_uint_t) field_bytelen * 8U); tmp = (duk_int64_t) ((duk_uint64_t) tmp << shift_tmp) >> shift_tmp; } duk_push_i64(thr, tmp); #else highbyte = p[i]; if (magic_signed && (highbyte & 0x80) != 0) { /* 0xff => 255 - 256 = -1; 0x80 => 128 - 256 = -128 */ tmp = (duk_double_t) (highbyte - 256); } else { tmp = (duk_double_t) highbyte; } for (;;) { i += i_step; if (i == i_end) { break; } DUK_ASSERT(i >= 0 && i < field_bytelen); tmp = (tmp * 256.0) + (duk_double_t) p[i]; } duk_push_number(thr, tmp); #endif break; } default: { /* should never happen but default here */ goto fail_bounds; } } return 1; fail_neutered: fail_field_length: fail_bounds: if (no_assert) { /* Node.js return value for noAssert out-of-bounds reads is * usually (but not always) NaN. Return NaN consistently. */ duk_push_nan(thr); return 1; } DUK_DCERROR_RANGE_INVALID_ARGS(thr); } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) /* XXX: split into separate functions for each field type? */ DUK_INTERNAL duk_ret_t duk_bi_buffer_writefield(duk_hthread *thr) { duk_small_int_t magic = (duk_small_int_t) duk_get_current_magic(thr); duk_small_int_t magic_ftype; duk_small_int_t magic_bigendian; duk_small_int_t magic_signed; duk_small_int_t magic_typedarray; duk_small_int_t endswap; duk_hbufobj *h_this; duk_bool_t no_assert; duk_int_t offset_signed; duk_uint_t offset; duk_uint_t buffer_length; duk_uint_t check_length; duk_uint8_t *buf; duk_double_union du; duk_int_t nbytes = 0; magic_ftype = magic & 0x0007; magic_bigendian = magic & 0x0008; magic_signed = magic & 0x0010; magic_typedarray = magic & 0x0020; DUK_UNREF(magic_signed); h_this = duk__require_bufobj_this(thr); /* XXX: very inefficient for plain buffers */ DUK_ASSERT(h_this != NULL); buffer_length = h_this->length; /* [ value offset noAssert ], when ftype != DUK__FLD_VARINT */ /* [ value offset fieldByteLength noAssert ], when ftype == DUK__FLD_VARINT */ /* [ offset value littleEndian ], when DUK__FLD_TYPEDARRAY (regardless of ftype) */ /* Handle TypedArray vs. Node.js Buffer arg differences */ if (magic_typedarray) { no_assert = 0; #if defined(DUK_USE_INTEGER_LE) endswap = !duk_to_boolean(thr, 2); /* 1=little endian */ #else endswap = duk_to_boolean(thr, 2); /* 1=little endian */ #endif duk_swap(thr, 0, 1); /* offset/value order different from Node.js */ } else { no_assert = duk_to_boolean(thr, (magic_ftype == DUK__FLD_VARINT) ? 3 : 2); #if defined(DUK_USE_INTEGER_LE) endswap = magic_bigendian; #else endswap = !magic_bigendian; #endif } /* Offset is coerced first to signed integer range and then to unsigned. * This ensures we can add a small byte length (1-8) to the offset in * bound checks and not wrap. */ offset_signed = duk_to_int(thr, 1); offset = (duk_uint_t) offset_signed; /* We need 'nbytes' even for a failed offset; return value must be * (offset + nbytes) even when write fails due to invalid offset. */ if (magic_ftype != DUK__FLD_VARINT) { DUK_ASSERT(magic_ftype >= 0 && magic_ftype < (duk_small_int_t) (sizeof(duk__buffer_nbytes_from_fldtype) / sizeof(duk_uint8_t))); nbytes = duk__buffer_nbytes_from_fldtype[magic_ftype]; } else { nbytes = duk_get_int(thr, 2); if (nbytes < 1 || nbytes > 6) { goto fail_field_length; } } DUK_ASSERT(nbytes >= 1 && nbytes <= 8); /* Now we can check offset validity. */ if (offset_signed < 0) { goto fail_bounds; } DUK_DDD(DUK_DDDPRINT("writefield, value=%!T, buffer_length=%ld, offset=%ld, no_assert=%d, " "magic=%04x, magic_fieldtype=%d, magic_bigendian=%d, magic_signed=%d, " "endswap=%d", duk_get_tval(thr, 0), (long) buffer_length, (long) offset, (int) no_assert, (unsigned int) magic, (int) magic_ftype, (int) (magic_bigendian >> 3), (int) (magic_signed >> 4), (int) endswap)); /* Coerce value to a number before computing check_length, so that * the field type specific coercion below can't have side effects * that would invalidate check_length. */ duk_to_number(thr, 0); /* Update 'buffer_length' to be the effective, safe limit which * takes into account the underlying buffer. This value will be * potentially invalidated by any side effect. */ check_length = DUK_HBUFOBJ_CLAMP_BYTELENGTH(h_this, buffer_length); DUK_DDD(DUK_DDDPRINT("buffer_length=%ld, check_length=%ld", (long) buffer_length, (long) check_length)); if (h_this->buf) { buf = DUK_HBUFOBJ_GET_SLICE_BASE(thr->heap, h_this); } else { /* Neutered. We could go into the switch-case safely with * buf == NULL because check_length == 0. To avoid scanbuild * warnings, fail directly instead. */ DUK_ASSERT(check_length == 0); goto fail_neutered; } DUK_ASSERT(buf != NULL); switch (magic_ftype) { case DUK__FLD_8BIT: { if (offset + 1U > check_length) { goto fail_bounds; } /* sign doesn't matter when writing */ buf[offset] = (duk_uint8_t) duk_to_uint32(thr, 0); break; } case DUK__FLD_16BIT: { duk_uint16_t tmp; if (offset + 2U > check_length) { goto fail_bounds; } tmp = (duk_uint16_t) duk_to_uint32(thr, 0); if (endswap) { tmp = DUK_BSWAP16(tmp); } du.us[0] = tmp; /* sign doesn't matter when writing */ duk_memcpy((void *) (buf + offset), (const void *) du.uc, 2); break; } case DUK__FLD_32BIT: { duk_uint32_t tmp; if (offset + 4U > check_length) { goto fail_bounds; } tmp = (duk_uint32_t) duk_to_uint32(thr, 0); if (endswap) { tmp = DUK_BSWAP32(tmp); } du.ui[0] = tmp; /* sign doesn't matter when writing */ duk_memcpy((void *) (buf + offset), (const void *) du.uc, 4); break; } case DUK__FLD_FLOAT: { duk_uint32_t tmp; if (offset + 4U > check_length) { goto fail_bounds; } du.f[0] = (duk_float_t) duk_to_number(thr, 0); if (endswap) { tmp = du.ui[0]; tmp = DUK_BSWAP32(tmp); du.ui[0] = tmp; } /* sign doesn't matter when writing */ duk_memcpy((void *) (buf + offset), (const void *) du.uc, 4); break; } case DUK__FLD_DOUBLE: { if (offset + 8U > check_length) { goto fail_bounds; } du.d = (duk_double_t) duk_to_number(thr, 0); if (endswap) { DUK_DBLUNION_BSWAP64(&du); } /* sign doesn't matter when writing */ duk_memcpy((void *) (buf + offset), (const void *) du.uc, 8); break; } case DUK__FLD_VARINT: { /* Node.js Buffer variable width integer field. We don't really * care about speed here, so aim for shortest algorithm. */ duk_int_t field_bytelen; duk_int_t i, i_step, i_end; #if defined(DUK_USE_64BIT_OPS) duk_int64_t tmp; #else duk_double_t tmp; #endif duk_uint8_t *p; field_bytelen = (duk_int_t) nbytes; if (offset + (duk_uint_t) field_bytelen > check_length) { goto fail_bounds; } /* Slow writing of value using either 64-bit arithmetic * or IEEE doubles if 64-bit types not available. There's * no special sign handling when writing varints. */ if (magic_bigendian) { /* Write in big endian */ i = field_bytelen; /* one i_step added at top of loop */ i_step = -1; i_end = 0; } else { /* Write in little endian */ i = -1; /* one i_step added at top of loop */ i_step = 1; i_end = field_bytelen - 1; } /* XXX: The duk_to_number() cast followed by integer coercion * is platform specific so NaN, +/- Infinity, and out-of-bounds * values result in platform specific output now. * See: test-bi-nodejs-buffer-proto-varint-special.js */ #if defined(DUK_USE_64BIT_OPS) tmp = (duk_int64_t) duk_to_number(thr, 0); p = (duk_uint8_t *) (buf + offset); do { i += i_step; DUK_ASSERT(i >= 0 && i < field_bytelen); p[i] = (duk_uint8_t) (tmp & 0xff); tmp = tmp >> 8; /* unnecessary shift for last byte */ } while (i != i_end); #else tmp = duk_to_number(thr, 0); p = (duk_uint8_t *) (buf + offset); do { i += i_step; tmp = DUK_FLOOR(tmp); DUK_ASSERT(i >= 0 && i < field_bytelen); p[i] = (duk_uint8_t) (DUK_FMOD(tmp, 256.0)); tmp = tmp / 256.0; /* unnecessary div for last byte */ } while (i != i_end); #endif break; } default: { /* should never happen but default here */ goto fail_bounds; } } /* Node.js Buffer: return offset + #bytes written (i.e. next * write offset). */ if (magic_typedarray) { /* For TypedArrays 'undefined' return value is specified * by ES2015 (matches V8). */ return 0; } duk_push_uint(thr, offset + (duk_uint_t) nbytes); return 1; fail_neutered: fail_field_length: fail_bounds: if (no_assert) { /* Node.js return value for failed writes is offset + #bytes * that would have been written. */ /* XXX: for negative input offsets, 'offset' will be a large * positive value so the result here is confusing. */ if (magic_typedarray) { return 0; } duk_push_uint(thr, offset + (duk_uint_t) nbytes); return 1; } DUK_DCERROR_RANGE_INVALID_ARGS(thr); } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * Accessors for .buffer, .byteLength, .byteOffset */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_LOCAL duk_hbufobj *duk__autospawn_arraybuffer(duk_hthread *thr, duk_hbuffer *h_buf) { duk_hbufobj *h_res; h_res = duk_push_bufobj_raw(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_BUFOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARRAYBUFFER), DUK_BIDX_ARRAYBUFFER_PROTOTYPE); DUK_ASSERT(h_res != NULL); DUK_UNREF(h_res); duk__set_bufobj_buffer(thr, h_res, h_buf); DUK_HBUFOBJ_ASSERT_VALID(h_res); DUK_ASSERT(h_res->buf_prop == NULL); return h_res; } DUK_INTERNAL duk_ret_t duk_bi_typedarray_buffer_getter(duk_hthread *thr) { duk_hbufobj *h_bufobj; h_bufobj = (duk_hbufobj *) duk__getrequire_bufobj_this(thr, DUK__BUFOBJ_FLAG_THROW /*flags*/); DUK_ASSERT(h_bufobj != NULL); if (DUK_HEAPHDR_IS_BUFFER((duk_heaphdr *) h_bufobj)) { DUK_DD(DUK_DDPRINT("autospawn ArrayBuffer for plain buffer")); (void) duk__autospawn_arraybuffer(thr, (duk_hbuffer *) h_bufobj); return 1; } else { if (h_bufobj->buf_prop == NULL && DUK_HOBJECT_GET_CLASS_NUMBER((duk_hobject *) h_bufobj) != DUK_HOBJECT_CLASS_ARRAYBUFFER && h_bufobj->buf != NULL) { duk_hbufobj *h_arrbuf; DUK_DD(DUK_DDPRINT("autospawn ArrayBuffer for typed array or DataView")); h_arrbuf = duk__autospawn_arraybuffer(thr, h_bufobj->buf); if (h_bufobj->buf_prop == NULL) { /* Must recheck buf_prop, in case ArrayBuffer * alloc had a side effect which already filled * it! */ /* Set ArrayBuffer's .byteOffset and .byteLength based * on the view so that Arraybuffer[view.byteOffset] * matches view[0]. */ h_arrbuf->offset = 0; DUK_ASSERT(h_bufobj->offset + h_bufobj->length >= h_bufobj->offset); /* Wrap check on creation. */ h_arrbuf->length = h_bufobj->offset + h_bufobj->length; DUK_ASSERT(h_arrbuf->buf_prop == NULL); DUK_ASSERT(h_bufobj->buf_prop == NULL); h_bufobj->buf_prop = (duk_hobject *) h_arrbuf; DUK_HBUFOBJ_INCREF(thr, h_arrbuf); /* Now reachable and accounted for. */ } /* Left on stack; pushed for the second time below (OK). */ } if (h_bufobj->buf_prop) { duk_push_hobject(thr, h_bufobj->buf_prop); return 1; } } return 0; } DUK_INTERNAL duk_ret_t duk_bi_typedarray_byteoffset_getter(duk_hthread *thr) { duk_hbufobj *h_bufobj; h_bufobj = (duk_hbufobj *) duk__getrequire_bufobj_this(thr, DUK__BUFOBJ_FLAG_THROW /*flags*/); DUK_ASSERT(h_bufobj != NULL); if (DUK_HEAPHDR_IS_BUFFER((duk_heaphdr *) h_bufobj)) { duk_push_uint(thr, 0); } else { /* If neutered must return 0; offset is zeroed during * neutering. */ duk_push_uint(thr, h_bufobj->offset); } return 1; } DUK_INTERNAL duk_ret_t duk_bi_typedarray_bytelength_getter(duk_hthread *thr) { duk_hbufobj *h_bufobj; h_bufobj = (duk_hbufobj *) duk__getrequire_bufobj_this(thr, DUK__BUFOBJ_FLAG_THROW /*flags*/); DUK_ASSERT(h_bufobj != NULL); if (DUK_HEAPHDR_IS_BUFFER((duk_heaphdr *) h_bufobj)) { duk_hbuffer *h_buf; h_buf = (duk_hbuffer *) h_bufobj; DUK_ASSERT(DUK_HBUFFER_GET_SIZE(h_buf) <= DUK_UINT_MAX); /* Buffer limits. */ duk_push_uint(thr, (duk_uint_t) DUK_HBUFFER_GET_SIZE(h_buf)); } else { /* If neutered must return 0; length is zeroed during * neutering. */ duk_push_uint(thr, h_bufobj->length); } return 1; } #else /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* No .buffer getter without ArrayBuffer support. */ #if 0 DUK_INTERNAL duk_ret_t duk_bi_typedarray_buffer_getter(duk_hthread *thr) { return 0; } #endif DUK_INTERNAL duk_ret_t duk_bi_typedarray_byteoffset_getter(duk_hthread *thr) { duk_push_uint(thr, 0); return 1; } DUK_INTERNAL duk_ret_t duk_bi_typedarray_bytelength_getter(duk_hthread *thr) { duk_hbuffer *h_buf; /* XXX: helper? */ duk_push_this(thr); h_buf = duk_require_hbuffer(thr, -1); duk_push_uint(thr, DUK_HBUFFER_GET_SIZE(h_buf)); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* automatic undefs */ #undef DUK__BUFOBJ_FLAG_PROMOTE #undef DUK__BUFOBJ_FLAG_THROW #undef DUK__FLD_16BIT #undef DUK__FLD_32BIT #undef DUK__FLD_8BIT #undef DUK__FLD_BIGENDIAN #undef DUK__FLD_DOUBLE #undef DUK__FLD_FLOAT #undef DUK__FLD_SIGNED #undef DUK__FLD_TYPEDARRAY #undef DUK__FLD_VARINT /* * Date built-ins * * Unlike most built-ins, Date has some platform dependencies for getting * UTC time, converting between UTC and local time, and parsing and * formatting time values. These are all abstracted behind DUK_USE_xxx * config options. There are built-in platform specific providers for * POSIX and Windows, but external providers can also be used. * * See doc/datetime.rst. * */ /* #include duk_internal.h -> already included */ /* XXX: currently defines unnecessary symbols when DUK_USE_DATE_BUILTIN is disabled. */ /* * Forward declarations */ DUK_LOCAL_DECL duk_double_t duk__push_this_get_timeval_tzoffset(duk_hthread *thr, duk_small_uint_t flags, duk_int_t *out_tzoffset); DUK_LOCAL_DECL duk_double_t duk__push_this_get_timeval(duk_hthread *thr, duk_small_uint_t flags); DUK_LOCAL_DECL void duk__twodigit_year_fixup(duk_hthread *thr, duk_idx_t idx_val); DUK_LOCAL_DECL duk_ret_t duk__set_this_timeval_from_dparts(duk_hthread *thr, duk_double_t *dparts, duk_small_uint_t flags); /* * Other file level defines */ /* Debug macro to print all parts and dparts (used manually because of debug level). */ #define DUK__DPRINT_PARTS_AND_DPARTS(parts,dparts) do { \ DUK_D(DUK_DPRINT("parts: %ld %ld %ld %ld %ld %ld %ld %ld, dparts: %lf %lf %lf %lf %lf %lf %lf %lf", \ (long) (parts)[0], (long) (parts)[1], \ (long) (parts)[2], (long) (parts)[3], \ (long) (parts)[4], (long) (parts)[5], \ (long) (parts)[6], (long) (parts)[7], \ (double) (dparts)[0], (double) (dparts)[1], \ (double) (dparts)[2], (double) (dparts)[3], \ (double) (dparts)[4], (double) (dparts)[5], \ (double) (dparts)[6], (double) (dparts)[7])); \ } while (0) #define DUK__DPRINT_PARTS(parts) do { \ DUK_D(DUK_DPRINT("parts: %ld %ld %ld %ld %ld %ld %ld %ld", \ (long) (parts)[0], (long) (parts)[1], \ (long) (parts)[2], (long) (parts)[3], \ (long) (parts)[4], (long) (parts)[5], \ (long) (parts)[6], (long) (parts)[7])); \ } while (0) #define DUK__DPRINT_DPARTS(dparts) do { \ DUK_D(DUK_DPRINT("dparts: %lf %lf %lf %lf %lf %lf %lf %lf", \ (double) (dparts)[0], (double) (dparts)[1], \ (double) (dparts)[2], (double) (dparts)[3], \ (double) (dparts)[4], (double) (dparts)[5], \ (double) (dparts)[6], (double) (dparts)[7])); \ } while (0) /* Equivalent year for DST calculations outside [1970,2038[ range, see * E5 Section 15.9.1.8. Equivalent year has the same leap-year-ness and * starts with the same weekday on Jan 1. * https://bugzilla.mozilla.org/show_bug.cgi?id=351066 */ #define DUK__YEAR(x) ((duk_uint8_t) ((x) - 1970)) DUK_LOCAL duk_uint8_t duk__date_equivyear[14] = { #if 1 /* This is based on V8 EquivalentYear() algorithm (see util/genequivyear.py): * http://code.google.com/p/v8/source/browse/trunk/src/date.h#146 */ /* non-leap year: sunday, monday, ... */ DUK__YEAR(2023), DUK__YEAR(2035), DUK__YEAR(2019), DUK__YEAR(2031), DUK__YEAR(2015), DUK__YEAR(2027), DUK__YEAR(2011), /* leap year: sunday, monday, ... */ DUK__YEAR(2012), DUK__YEAR(2024), DUK__YEAR(2008), DUK__YEAR(2020), DUK__YEAR(2032), DUK__YEAR(2016), DUK__YEAR(2028) #endif #if 0 /* This is based on Rhino EquivalentYear() algorithm: * https://github.com/mozilla/rhino/blob/f99cc11d616f0cdda2c42bde72b3484df6182947/src/org/mozilla/javascript/NativeDate.java */ /* non-leap year: sunday, monday, ... */ DUK__YEAR(1978), DUK__YEAR(1973), DUK__YEAR(1985), DUK__YEAR(1986), DUK__YEAR(1981), DUK__YEAR(1971), DUK__YEAR(1977), /* leap year: sunday, monday, ... */ DUK__YEAR(1984), DUK__YEAR(1996), DUK__YEAR(1980), DUK__YEAR(1992), DUK__YEAR(1976), DUK__YEAR(1988), DUK__YEAR(1972) #endif }; /* * ISO 8601 subset parser. */ /* Parser part count. */ #define DUK__NUM_ISO8601_PARSER_PARTS 9 /* Parser part indices. */ #define DUK__PI_YEAR 0 #define DUK__PI_MONTH 1 #define DUK__PI_DAY 2 #define DUK__PI_HOUR 3 #define DUK__PI_MINUTE 4 #define DUK__PI_SECOND 5 #define DUK__PI_MILLISECOND 6 #define DUK__PI_TZHOUR 7 #define DUK__PI_TZMINUTE 8 /* Parser part masks. */ #define DUK__PM_YEAR (1 << DUK__PI_YEAR) #define DUK__PM_MONTH (1 << DUK__PI_MONTH) #define DUK__PM_DAY (1 << DUK__PI_DAY) #define DUK__PM_HOUR (1 << DUK__PI_HOUR) #define DUK__PM_MINUTE (1 << DUK__PI_MINUTE) #define DUK__PM_SECOND (1 << DUK__PI_SECOND) #define DUK__PM_MILLISECOND (1 << DUK__PI_MILLISECOND) #define DUK__PM_TZHOUR (1 << DUK__PI_TZHOUR) #define DUK__PM_TZMINUTE (1 << DUK__PI_TZMINUTE) /* Parser separator indices. */ #define DUK__SI_PLUS 0 #define DUK__SI_MINUS 1 #define DUK__SI_T 2 #define DUK__SI_SPACE 3 #define DUK__SI_COLON 4 #define DUK__SI_PERIOD 5 #define DUK__SI_Z 6 #define DUK__SI_NUL 7 /* Parser separator masks. */ #define DUK__SM_PLUS (1 << DUK__SI_PLUS) #define DUK__SM_MINUS (1 << DUK__SI_MINUS) #define DUK__SM_T (1 << DUK__SI_T) #define DUK__SM_SPACE (1 << DUK__SI_SPACE) #define DUK__SM_COLON (1 << DUK__SI_COLON) #define DUK__SM_PERIOD (1 << DUK__SI_PERIOD) #define DUK__SM_Z (1 << DUK__SI_Z) #define DUK__SM_NUL (1 << DUK__SI_NUL) /* Rule control flags. */ #define DUK__CF_NEG (1 << 0) /* continue matching, set neg_tzoffset flag */ #define DUK__CF_ACCEPT (1 << 1) /* accept string */ #define DUK__CF_ACCEPT_NUL (1 << 2) /* accept string if next char is NUL (otherwise reject) */ #define DUK__PACK_RULE(partmask,sepmask,nextpart,flags) \ ((duk_uint32_t) (partmask) + \ (((duk_uint32_t) (sepmask)) << 9) + \ (((duk_uint32_t) (nextpart)) << 17) + \ (((duk_uint32_t) (flags)) << 21)) #define DUK__UNPACK_RULE(rule,var_nextidx,var_flags) do { \ (var_nextidx) = (duk_small_uint_t) (((rule) >> 17) & 0x0f); \ (var_flags) = (duk_small_uint_t) ((rule) >> 21); \ } while (0) #define DUK__RULE_MASK_PART_SEP 0x1ffffUL /* Matching separator index is used in the control table */ DUK_LOCAL const duk_uint8_t duk__parse_iso8601_seps[] = { DUK_ASC_PLUS /*0*/, DUK_ASC_MINUS /*1*/, DUK_ASC_UC_T /*2*/, DUK_ASC_SPACE /*3*/, DUK_ASC_COLON /*4*/, DUK_ASC_PERIOD /*5*/, DUK_ASC_UC_Z /*6*/, DUK_ASC_NUL /*7*/ }; /* Rule table: first matching rule is used to determine what to do next. */ DUK_LOCAL const duk_uint32_t duk__parse_iso8601_control[] = { DUK__PACK_RULE(DUK__PM_YEAR, DUK__SM_MINUS, DUK__PI_MONTH, 0), DUK__PACK_RULE(DUK__PM_MONTH, DUK__SM_MINUS, DUK__PI_DAY, 0), DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY, DUK__SM_T | DUK__SM_SPACE, DUK__PI_HOUR, 0), DUK__PACK_RULE(DUK__PM_HOUR, DUK__SM_COLON, DUK__PI_MINUTE, 0), DUK__PACK_RULE(DUK__PM_MINUTE, DUK__SM_COLON, DUK__PI_SECOND, 0), DUK__PACK_RULE(DUK__PM_SECOND, DUK__SM_PERIOD, DUK__PI_MILLISECOND, 0), DUK__PACK_RULE(DUK__PM_TZHOUR, DUK__SM_COLON, DUK__PI_TZMINUTE, 0), DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY | DUK__PM_HOUR /*Note1*/ | DUK__PM_MINUTE | DUK__PM_SECOND | DUK__PM_MILLISECOND, DUK__SM_PLUS, DUK__PI_TZHOUR, 0), DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY | DUK__PM_HOUR /*Note1*/ | DUK__PM_MINUTE | DUK__PM_SECOND | DUK__PM_MILLISECOND, DUK__SM_MINUS, DUK__PI_TZHOUR, DUK__CF_NEG), DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY | DUK__PM_HOUR /*Note1*/ | DUK__PM_MINUTE | DUK__PM_SECOND | DUK__PM_MILLISECOND, DUK__SM_Z, 0, DUK__CF_ACCEPT_NUL), DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY | DUK__PM_HOUR /*Note1*/ | DUK__PM_MINUTE | DUK__PM_SECOND | DUK__PM_MILLISECOND | DUK__PM_TZHOUR /*Note2*/ | DUK__PM_TZMINUTE, DUK__SM_NUL, 0, DUK__CF_ACCEPT) /* Note1: the specification doesn't require matching a time form with * just hours ("HH"), but we accept it here, e.g. "2012-01-02T12Z". * * Note2: the specification doesn't require matching a timezone offset * with just hours ("HH"), but accept it here, e.g. "2012-01-02T03:04:05+02" */ }; DUK_LOCAL duk_bool_t duk__parse_string_iso8601_subset(duk_hthread *thr, const char *str) { duk_int_t parts[DUK__NUM_ISO8601_PARSER_PARTS]; duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS]; duk_double_t d; const duk_uint8_t *p; duk_small_uint_t part_idx = 0; duk_int_t accum = 0; duk_small_uint_t ndigits = 0; duk_bool_t neg_year = 0; duk_bool_t neg_tzoffset = 0; duk_uint_fast8_t ch; duk_small_uint_t i; /* During parsing, month and day are one-based; set defaults here. */ duk_memzero(parts, sizeof(parts)); DUK_ASSERT(parts[DUK_DATE_IDX_YEAR] == 0); /* don't care value, year is mandatory */ parts[DUK_DATE_IDX_MONTH] = 1; parts[DUK_DATE_IDX_DAY] = 1; /* Special handling for year sign. */ p = (const duk_uint8_t *) str; ch = p[0]; if (ch == DUK_ASC_PLUS) { p++; } else if (ch == DUK_ASC_MINUS) { neg_year = 1; p++; } for (;;) { ch = *p++; DUK_DDD(DUK_DDDPRINT("parsing, part_idx=%ld, char=%ld ('%c')", (long) part_idx, (long) ch, (int) ((ch >= 0x20 && ch <= 0x7e) ? ch : DUK_ASC_QUESTION))); if (ch >= DUK_ASC_0 && ch <= DUK_ASC_9) { if (ndigits >= 9) { DUK_DDD(DUK_DDDPRINT("too many digits -> reject")); goto reject; } if (part_idx == DUK__PI_MILLISECOND && ndigits >= 3) { /* ignore millisecond fractions after 3 */ } else { accum = accum * 10 + ((duk_int_t) ch) - ((duk_int_t) DUK_ASC_0) + 0x00; ndigits++; } } else { duk_uint_fast32_t match_val; duk_small_uint_t sep_idx; if (ndigits <= 0) { goto reject; } if (part_idx == DUK__PI_MILLISECOND) { /* complete the millisecond field */ while (ndigits < 3) { accum *= 10; ndigits++; } } parts[part_idx] = accum; DUK_DDD(DUK_DDDPRINT("wrote part %ld -> value %ld", (long) part_idx, (long) accum)); accum = 0; ndigits = 0; for (i = 0; i < (duk_small_uint_t) (sizeof(duk__parse_iso8601_seps) / sizeof(duk_uint8_t)); i++) { if (duk__parse_iso8601_seps[i] == ch) { break; } } if (i == (duk_small_uint_t) (sizeof(duk__parse_iso8601_seps) / sizeof(duk_uint8_t))) { DUK_DDD(DUK_DDDPRINT("separator character doesn't match -> reject")); goto reject; } sep_idx = i; match_val = (1UL << part_idx) + (1UL << (sep_idx + 9)); /* match against rule part/sep bits */ for (i = 0; i < (duk_small_uint_t) (sizeof(duk__parse_iso8601_control) / sizeof(duk_uint32_t)); i++) { duk_uint_fast32_t rule = duk__parse_iso8601_control[i]; duk_small_uint_t nextpart; duk_small_uint_t cflags; DUK_DDD(DUK_DDDPRINT("part_idx=%ld, sep_idx=%ld, match_val=0x%08lx, considering rule=0x%08lx", (long) part_idx, (long) sep_idx, (unsigned long) match_val, (unsigned long) rule)); if ((rule & match_val) != match_val) { continue; } DUK__UNPACK_RULE(rule, nextpart, cflags); DUK_DDD(DUK_DDDPRINT("rule match -> part_idx=%ld, sep_idx=%ld, match_val=0x%08lx, " "rule=0x%08lx -> nextpart=%ld, cflags=0x%02lx", (long) part_idx, (long) sep_idx, (unsigned long) match_val, (unsigned long) rule, (long) nextpart, (unsigned long) cflags)); if (cflags & DUK__CF_NEG) { neg_tzoffset = 1; } if (cflags & DUK__CF_ACCEPT) { goto accept; } if (cflags & DUK__CF_ACCEPT_NUL) { DUK_ASSERT(*(p - 1) != (char) 0); if (*p == DUK_ASC_NUL) { goto accept; } goto reject; } part_idx = nextpart; break; } /* rule match */ if (i == (duk_small_uint_t) (sizeof(duk__parse_iso8601_control) / sizeof(duk_uint32_t))) { DUK_DDD(DUK_DDDPRINT("no rule matches -> reject")); goto reject; } if (ch == 0) { /* This shouldn't be necessary, but check just in case * to avoid any chance of overruns. */ DUK_DDD(DUK_DDDPRINT("NUL after rule matching (should not happen) -> reject")); goto reject; } } /* if-digit-else-ctrl */ } /* char loop */ /* We should never exit the loop above. */ DUK_UNREACHABLE(); reject: DUK_DDD(DUK_DDDPRINT("reject")); return 0; accept: DUK_DDD(DUK_DDDPRINT("accept")); /* Apply timezone offset to get the main parts in UTC */ if (neg_year) { parts[DUK__PI_YEAR] = -parts[DUK__PI_YEAR]; } if (neg_tzoffset) { parts[DUK__PI_HOUR] += parts[DUK__PI_TZHOUR]; parts[DUK__PI_MINUTE] += parts[DUK__PI_TZMINUTE]; } else { parts[DUK__PI_HOUR] -= parts[DUK__PI_TZHOUR]; parts[DUK__PI_MINUTE] -= parts[DUK__PI_TZMINUTE]; } parts[DUK__PI_MONTH] -= 1; /* zero-based month */ parts[DUK__PI_DAY] -= 1; /* zero-based day */ /* Use double parts, they tolerate unnormalized time. * * Note: DUK_DATE_IDX_WEEKDAY is initialized with a bogus value (DUK__PI_TZHOUR) * on purpose. It won't be actually used by duk_bi_date_get_timeval_from_dparts(), * but will make the value initialized just in case, and avoid any * potential for Valgrind issues. */ for (i = 0; i < DUK_DATE_IDX_NUM_PARTS; i++) { DUK_DDD(DUK_DDDPRINT("part[%ld] = %ld", (long) i, (long) parts[i])); dparts[i] = parts[i]; } d = duk_bi_date_get_timeval_from_dparts(dparts, 0 /*flags*/); duk_push_number(thr, d); return 1; } /* * Date/time parsing helper. * * Parse a datetime string into a time value. We must first try to parse * the input according to the standard format in E5.1 Section 15.9.1.15. * If that fails, we can try to parse using custom parsing, which can * either be platform neutral (custom code) or platform specific (using * existing platform API calls). * * Note in particular that we must parse whatever toString(), toUTCString(), * and toISOString() can produce; see E5.1 Section 15.9.4.2. * * Returns 1 to allow tail calling. * * There is much room for improvement here with respect to supporting * alternative datetime formats. For instance, V8 parses '2012-01-01' as * UTC and '2012/01/01' as local time. */ DUK_LOCAL duk_ret_t duk__parse_string(duk_hthread *thr, const char *str) { /* XXX: there is a small risk here: because the ISO 8601 parser is * very loose, it may end up parsing some datetime values which * would be better parsed with a platform specific parser. */ DUK_ASSERT(str != NULL); DUK_DDD(DUK_DDDPRINT("parse datetime from string '%s'", (const char *) str)); if (duk__parse_string_iso8601_subset(thr, str) != 0) { return 1; } #if defined(DUK_USE_DATE_PARSE_STRING) /* Contract, either: * - Push value on stack and return 1 * - Don't push anything on stack and return 0 */ if (DUK_USE_DATE_PARSE_STRING(thr, str) != 0) { return 1; } #else /* No platform-specific parsing, this is not an error. */ #endif duk_push_nan(thr); return 1; } /* * Calendar helpers * * Some helpers are used for getters and can operate on normalized values * which can be represented with 32-bit signed integers. Other helpers are * needed by setters and operate on un-normalized double values, must watch * out for non-finite numbers etc. */ DUK_LOCAL duk_uint8_t duk__days_in_month[12] = { (duk_uint8_t) 31, (duk_uint8_t) 28, (duk_uint8_t) 31, (duk_uint8_t) 30, (duk_uint8_t) 31, (duk_uint8_t) 30, (duk_uint8_t) 31, (duk_uint8_t) 31, (duk_uint8_t) 30, (duk_uint8_t) 31, (duk_uint8_t) 30, (duk_uint8_t) 31 }; /* Maximum iteration count for computing UTC-to-local time offset when * creating an ECMAScript time value from local parts. */ #define DUK__LOCAL_TZOFFSET_MAXITER 4 /* Because 'day since epoch' can be negative and is used to compute weekday * using a modulo operation, add this multiple of 7 to avoid negative values * when year is below 1970 epoch. ECMAScript time values are restricted to * +/- 100 million days from epoch, so this adder fits nicely into 32 bits. * Round to a multiple of 7 (= floor(100000000 / 7) * 7) and add margin. */ #define DUK__WEEKDAY_MOD_ADDER (20000000 * 7) /* 0x08583b00 */ DUK_INTERNAL duk_bool_t duk_bi_date_is_leap_year(duk_int_t year) { if ((year % 4) != 0) { return 0; } if ((year % 100) != 0) { return 1; } if ((year % 400) != 0) { return 0; } return 1; } DUK_INTERNAL duk_bool_t duk_bi_date_timeval_in_valid_range(duk_double_t x) { return (x >= -DUK_DATE_MSEC_100M_DAYS && x <= DUK_DATE_MSEC_100M_DAYS); } DUK_INTERNAL duk_bool_t duk_bi_date_timeval_in_leeway_range(duk_double_t x) { return (x >= -DUK_DATE_MSEC_100M_DAYS_LEEWAY && x <= DUK_DATE_MSEC_100M_DAYS_LEEWAY); } DUK_INTERNAL duk_bool_t duk_bi_date_year_in_valid_range(duk_double_t x) { return (x >= DUK_DATE_MIN_ECMA_YEAR && x <= DUK_DATE_MAX_ECMA_YEAR); } DUK_LOCAL duk_double_t duk__timeclip(duk_double_t x) { if (!DUK_ISFINITE(x)) { return DUK_DOUBLE_NAN; } if (!duk_bi_date_timeval_in_valid_range(x)) { return DUK_DOUBLE_NAN; } x = duk_js_tointeger_number(x); /* Here we'd have the option to normalize -0 to +0. */ return x; } /* Integer division which floors also negative values correctly. */ DUK_LOCAL duk_int_t duk__div_floor(duk_int_t a, duk_int_t b) { DUK_ASSERT(b > 0); if (a >= 0) { return a / b; } else { /* e.g. a = -4, b = 5 --> -4 - 5 + 1 / 5 --> -8 / 5 --> -1 * a = -5, b = 5 --> -5 - 5 + 1 / 5 --> -9 / 5 --> -1 * a = -6, b = 5 --> -6 - 5 + 1 / 5 --> -10 / 5 --> -2 */ return (a - b + 1) / b; } } /* Compute day number of the first day of a given year. */ DUK_LOCAL duk_int_t duk__day_from_year(duk_int_t year) { /* Note: in integer arithmetic, (x / 4) is same as floor(x / 4) for non-negative * values, but is incorrect for negative ones. */ return 365 * (year - 1970) + duk__div_floor(year - 1969, 4) - duk__div_floor(year - 1901, 100) + duk__div_floor(year - 1601, 400); } /* Given a day number, determine year and day-within-year. */ DUK_LOCAL duk_int_t duk__year_from_day(duk_int_t day, duk_small_int_t *out_day_within_year) { duk_int_t year; duk_int_t diff_days; /* estimate year upwards (towards positive infinity), then back down; * two iterations should be enough */ if (day >= 0) { year = 1970 + day / 365; } else { year = 1970 + day / 366; } for (;;) { diff_days = duk__day_from_year(year) - day; DUK_DDD(DUK_DDDPRINT("year=%ld day=%ld, diff_days=%ld", (long) year, (long) day, (long) diff_days)); if (diff_days <= 0) { DUK_ASSERT(-diff_days < 366); /* fits into duk_small_int_t */ *out_day_within_year = -diff_days; DUK_DDD(DUK_DDDPRINT("--> year=%ld, day-within-year=%ld", (long) year, (long) *out_day_within_year)); DUK_ASSERT(*out_day_within_year >= 0); DUK_ASSERT(*out_day_within_year < (duk_bi_date_is_leap_year(year) ? 366 : 365)); return year; } /* Note: this is very tricky; we must never 'overshoot' the * correction downwards. */ year -= 1 + (diff_days - 1) / 366; /* conservative */ } } /* Given a (year, month, day-within-month) triple, compute day number. * The input triple is un-normalized and may contain non-finite values. */ DUK_LOCAL duk_double_t duk__make_day(duk_double_t year, duk_double_t month, duk_double_t day) { duk_int_t day_num; duk_bool_t is_leap; duk_small_int_t i, n; /* Assume that year, month, day are all coerced to whole numbers. * They may also be NaN or infinity, in which case this function * must return NaN or infinity to ensure time value becomes NaN. * If 'day' is NaN, the final return will end up returning a NaN, * so it doesn't need to be checked here. */ if (!DUK_ISFINITE(year) || !DUK_ISFINITE(month)) { return DUK_DOUBLE_NAN; } year += DUK_FLOOR(month / 12.0); month = DUK_FMOD(month, 12.0); if (month < 0.0) { /* handle negative values */ month += 12.0; } /* The algorithm in E5.1 Section 15.9.1.12 normalizes month, but * does not normalize the day-of-month (nor check whether or not * it is finite) because it's not necessary for finding the day * number which matches the (year,month) pair. * * We assume that duk__day_from_year() is exact here. * * Without an explicit infinity / NaN check in the beginning, * day_num would be a bogus integer here. * * It's possible for 'year' to be out of integer range here. * If so, we need to return NaN without integer overflow. * This fixes test-bug-setyear-overflow.js. */ if (!duk_bi_date_year_in_valid_range(year)) { DUK_DD(DUK_DDPRINT("year not in ecmascript valid range, avoid integer overflow: %lf", (double) year)); return DUK_DOUBLE_NAN; } day_num = duk__day_from_year((duk_int_t) year); is_leap = duk_bi_date_is_leap_year((duk_int_t) year); n = (duk_small_int_t) month; for (i = 0; i < n; i++) { day_num += duk__days_in_month[i]; if (i == 1 && is_leap) { day_num++; } } /* If 'day' is NaN, returns NaN. */ return (duk_double_t) day_num + day; } /* Split time value into parts. The time value may contain fractions (it may * come from duk_time_to_components() API call) which are truncated. Possible * local time adjustment has already been applied when reading the time value. */ DUK_INTERNAL void duk_bi_date_timeval_to_parts(duk_double_t d, duk_int_t *parts, duk_double_t *dparts, duk_small_uint_t flags) { duk_double_t d1, d2; duk_int_t t1, t2; duk_int_t day_since_epoch; duk_int_t year; /* does not fit into 16 bits */ duk_small_int_t day_in_year; duk_small_int_t month; duk_small_int_t day; duk_small_int_t dim; duk_int_t jan1_since_epoch; duk_small_int_t jan1_weekday; duk_int_t equiv_year; duk_small_uint_t i; duk_bool_t is_leap; duk_small_int_t arridx; DUK_ASSERT(DUK_ISFINITE(d)); /* caller checks */ d = DUK_FLOOR(d); /* remove fractions if present */ DUK_ASSERT(DUK_FLOOR(d) == d); /* The timevalue must be in valid ECMAScript range, but since a local * time offset can be applied, we need to allow a +/- 24h leeway to * the value. In other words, although the UTC time is within the * ECMAScript range, the local part values can be just outside of it. */ DUK_UNREF(duk_bi_date_timeval_in_leeway_range); DUK_ASSERT(duk_bi_date_timeval_in_leeway_range(d)); /* These computations are guaranteed to be exact for the valid * E5 time value range, assuming milliseconds without fractions. */ d1 = (duk_double_t) DUK_FMOD(d, (double) DUK_DATE_MSEC_DAY); if (d1 < 0.0) { /* deal with negative values */ d1 += (duk_double_t) DUK_DATE_MSEC_DAY; } d2 = DUK_FLOOR((double) (d / (duk_double_t) DUK_DATE_MSEC_DAY)); DUK_ASSERT(d2 * ((duk_double_t) DUK_DATE_MSEC_DAY) + d1 == d); /* now expected to fit into a 32-bit integer */ t1 = (duk_int_t) d1; t2 = (duk_int_t) d2; day_since_epoch = t2; DUK_ASSERT((duk_double_t) t1 == d1); DUK_ASSERT((duk_double_t) t2 == d2); /* t1 = milliseconds within day (fits 32 bit) * t2 = day number from epoch (fits 32 bit, may be negative) */ parts[DUK_DATE_IDX_MILLISECOND] = t1 % 1000; t1 /= 1000; parts[DUK_DATE_IDX_SECOND] = t1 % 60; t1 /= 60; parts[DUK_DATE_IDX_MINUTE] = t1 % 60; t1 /= 60; parts[DUK_DATE_IDX_HOUR] = t1; DUK_ASSERT(parts[DUK_DATE_IDX_MILLISECOND] >= 0 && parts[DUK_DATE_IDX_MILLISECOND] <= 999); DUK_ASSERT(parts[DUK_DATE_IDX_SECOND] >= 0 && parts[DUK_DATE_IDX_SECOND] <= 59); DUK_ASSERT(parts[DUK_DATE_IDX_MINUTE] >= 0 && parts[DUK_DATE_IDX_MINUTE] <= 59); DUK_ASSERT(parts[DUK_DATE_IDX_HOUR] >= 0 && parts[DUK_DATE_IDX_HOUR] <= 23); DUK_DDD(DUK_DDDPRINT("d=%lf, d1=%lf, d2=%lf, t1=%ld, t2=%ld, parts: hour=%ld min=%ld sec=%ld msec=%ld", (double) d, (double) d1, (double) d2, (long) t1, (long) t2, (long) parts[DUK_DATE_IDX_HOUR], (long) parts[DUK_DATE_IDX_MINUTE], (long) parts[DUK_DATE_IDX_SECOND], (long) parts[DUK_DATE_IDX_MILLISECOND])); /* This assert depends on the input parts representing time inside * the ECMAScript range. */ DUK_ASSERT(t2 + DUK__WEEKDAY_MOD_ADDER >= 0); parts[DUK_DATE_IDX_WEEKDAY] = (t2 + 4 + DUK__WEEKDAY_MOD_ADDER) % 7; /* E5.1 Section 15.9.1.6 */ DUK_ASSERT(parts[DUK_DATE_IDX_WEEKDAY] >= 0 && parts[DUK_DATE_IDX_WEEKDAY] <= 6); year = duk__year_from_day(t2, &day_in_year); day = day_in_year; is_leap = duk_bi_date_is_leap_year(year); for (month = 0; month < 12; month++) { dim = duk__days_in_month[month]; if (month == 1 && is_leap) { dim++; } DUK_DDD(DUK_DDDPRINT("month=%ld, dim=%ld, day=%ld", (long) month, (long) dim, (long) day)); if (day < dim) { break; } day -= dim; } DUK_DDD(DUK_DDDPRINT("final month=%ld", (long) month)); DUK_ASSERT(month >= 0 && month <= 11); DUK_ASSERT(day >= 0 && day <= 31); /* Equivalent year mapping, used to avoid DST trouble when platform * may fail to provide reasonable DST answers for dates outside the * ordinary range (e.g. 1970-2038). An equivalent year has the same * leap-year-ness as the original year and begins on the same weekday * (Jan 1). * * The year 2038 is avoided because there seem to be problems with it * on some platforms. The year 1970 is also avoided as there were * practical problems with it; an equivalent year is used for it too, * which breaks some DST computations for 1970 right now, see e.g. * test-bi-date-tzoffset-brute-fi.js. */ if ((flags & DUK_DATE_FLAG_EQUIVYEAR) && (year < 1971 || year > 2037)) { DUK_ASSERT(is_leap == 0 || is_leap == 1); jan1_since_epoch = day_since_epoch - day_in_year; /* day number for Jan 1 since epoch */ DUK_ASSERT(jan1_since_epoch + DUK__WEEKDAY_MOD_ADDER >= 0); jan1_weekday = (jan1_since_epoch + 4 + DUK__WEEKDAY_MOD_ADDER) % 7; /* E5.1 Section 15.9.1.6 */ DUK_ASSERT(jan1_weekday >= 0 && jan1_weekday <= 6); arridx = jan1_weekday; if (is_leap) { arridx += 7; } DUK_ASSERT(arridx >= 0 && arridx < (duk_small_int_t) (sizeof(duk__date_equivyear) / sizeof(duk_uint8_t))); equiv_year = (duk_int_t) duk__date_equivyear[arridx] + 1970; year = equiv_year; DUK_DDD(DUK_DDDPRINT("equiv year mapping, year=%ld, day_in_year=%ld, day_since_epoch=%ld, " "jan1_since_epoch=%ld, jan1_weekday=%ld -> equiv year %ld", (long) year, (long) day_in_year, (long) day_since_epoch, (long) jan1_since_epoch, (long) jan1_weekday, (long) equiv_year)); } parts[DUK_DATE_IDX_YEAR] = year; parts[DUK_DATE_IDX_MONTH] = month; parts[DUK_DATE_IDX_DAY] = day; if (flags & DUK_DATE_FLAG_ONEBASED) { parts[DUK_DATE_IDX_MONTH]++; /* zero-based -> one-based */ parts[DUK_DATE_IDX_DAY]++; /* -""- */ } if (dparts != NULL) { for (i = 0; i < DUK_DATE_IDX_NUM_PARTS; i++) { dparts[i] = (duk_double_t) parts[i]; } } } /* Compute time value from (double) parts. The parts can be either UTC * or local time; if local, they need to be (conceptually) converted into * UTC time. The parts may represent valid or invalid time, and may be * wildly out of range (but may cancel each other and still come out in * the valid Date range). */ DUK_INTERNAL duk_double_t duk_bi_date_get_timeval_from_dparts(duk_double_t *dparts, duk_small_uint_t flags) { #if defined(DUK_USE_PARANOID_DATE_COMPUTATION) /* See comments below on MakeTime why these are volatile. */ volatile duk_double_t tmp_time; volatile duk_double_t tmp_day; volatile duk_double_t d; #else duk_double_t tmp_time; duk_double_t tmp_day; duk_double_t d; #endif duk_small_uint_t i; duk_int_t tzoff, tzoffprev1, tzoffprev2; /* Expects 'this' at top of stack on entry. */ /* Coerce all finite parts with ToInteger(). ToInteger() must not * be called for NaN/Infinity because it will convert e.g. NaN to * zero. If ToInteger() has already been called, this has no side * effects and is idempotent. * * Don't read dparts[DUK_DATE_IDX_WEEKDAY]; it will cause Valgrind * issues if the value is uninitialized. */ for (i = 0; i <= DUK_DATE_IDX_MILLISECOND; i++) { /* SCANBUILD: scan-build complains here about assigned value * being garbage or undefined. This is correct but operating * on undefined values has no ill effect and is ignored by the * caller in the case where this happens. */ d = dparts[i]; if (DUK_ISFINITE(d)) { dparts[i] = duk_js_tointeger_number(d); } } /* Use explicit steps in computation to try to ensure that * computation happens with intermediate results coerced to * double values (instead of using something more accurate). * E.g. E5.1 Section 15.9.1.11 requires use of IEEE 754 * rules (= ECMAScript '+' and '*' operators). * * Without 'volatile' even this approach fails on some platform * and compiler combinations. For instance, gcc 4.8.1 on Ubuntu * 64-bit, with -m32 and without -std=c99, test-bi-date-canceling.js * would fail because of some optimizations when computing tmp_time * (MakeTime below). Adding 'volatile' to tmp_time solved this * particular problem (annoyingly, also adding debug prints or * running the executable under valgrind hides it). */ /* MakeTime */ tmp_time = 0.0; tmp_time += dparts[DUK_DATE_IDX_HOUR] * ((duk_double_t) DUK_DATE_MSEC_HOUR); tmp_time += dparts[DUK_DATE_IDX_MINUTE] * ((duk_double_t) DUK_DATE_MSEC_MINUTE); tmp_time += dparts[DUK_DATE_IDX_SECOND] * ((duk_double_t) DUK_DATE_MSEC_SECOND); tmp_time += dparts[DUK_DATE_IDX_MILLISECOND]; /* MakeDay */ tmp_day = duk__make_day(dparts[DUK_DATE_IDX_YEAR], dparts[DUK_DATE_IDX_MONTH], dparts[DUK_DATE_IDX_DAY]); /* MakeDate */ d = tmp_day * ((duk_double_t) DUK_DATE_MSEC_DAY) + tmp_time; DUK_DDD(DUK_DDDPRINT("time=%lf day=%lf --> timeval=%lf", (double) tmp_time, (double) tmp_day, (double) d)); /* Optional UTC conversion. */ if (flags & DUK_DATE_FLAG_LOCALTIME) { /* DUK_USE_DATE_GET_LOCAL_TZOFFSET() needs to be called with a * time value computed from UTC parts. At this point we only * have 'd' which is a time value computed from local parts, so * it is off by the UTC-to-local time offset which we don't know * yet. The current solution for computing the UTC-to-local * time offset is to iterate a few times and detect a fixed * point or a two-cycle loop (or a sanity iteration limit), * see test-bi-date-local-parts.js and test-bi-date-tzoffset-basic-fi.js. * * E5.1 Section 15.9.1.9: * UTC(t) = t - LocalTZA - DaylightSavingTA(t - LocalTZA) * * For NaN/inf, DUK_USE_DATE_GET_LOCAL_TZOFFSET() returns 0. */ #if 0 /* Old solution: don't iterate, incorrect */ tzoff = DUK_USE_DATE_GET_LOCAL_TZOFFSET(d); DUK_DDD(DUK_DDDPRINT("tzoffset w/o iteration, tzoff=%ld", (long) tzoff)); d -= tzoff * 1000L; DUK_UNREF(tzoffprev1); DUK_UNREF(tzoffprev2); #endif /* Iteration solution */ tzoff = 0; tzoffprev1 = 999999999L; /* invalid value which never matches */ for (i = 0; i < DUK__LOCAL_TZOFFSET_MAXITER; i++) { tzoffprev2 = tzoffprev1; tzoffprev1 = tzoff; tzoff = DUK_USE_DATE_GET_LOCAL_TZOFFSET(d - tzoff * 1000L); DUK_DDD(DUK_DDDPRINT("tzoffset iteration, i=%d, tzoff=%ld, tzoffprev1=%ld tzoffprev2=%ld", (int) i, (long) tzoff, (long) tzoffprev1, (long) tzoffprev2)); if (tzoff == tzoffprev1) { DUK_DDD(DUK_DDDPRINT("tzoffset iteration finished, i=%d, tzoff=%ld, tzoffprev1=%ld, tzoffprev2=%ld", (int) i, (long) tzoff, (long) tzoffprev1, (long) tzoffprev2)); break; } else if (tzoff == tzoffprev2) { /* Two value cycle, see e.g. test-bi-date-tzoffset-basic-fi.js. * In these cases, favor a higher tzoffset to get a consistent * result which is independent of iteration count. Not sure if * this is a generically correct solution. */ DUK_DDD(DUK_DDDPRINT("tzoffset iteration two-value cycle, i=%d, tzoff=%ld, tzoffprev1=%ld, tzoffprev2=%ld", (int) i, (long) tzoff, (long) tzoffprev1, (long) tzoffprev2)); if (tzoffprev1 > tzoff) { tzoff = tzoffprev1; } break; } } DUK_DDD(DUK_DDDPRINT("tzoffset iteration, tzoff=%ld", (long) tzoff)); d -= tzoff * 1000L; } /* TimeClip(), which also handles Infinity -> NaN conversion */ d = duk__timeclip(d); return d; } /* * API oriented helpers */ /* Push 'this' binding, check that it is a Date object; then push the * internal time value. At the end, stack is: [ ... this timeval ]. * Returns the time value. Local time adjustment is done if requested. */ DUK_LOCAL duk_double_t duk__push_this_get_timeval_tzoffset(duk_hthread *thr, duk_small_uint_t flags, duk_int_t *out_tzoffset) { duk_hobject *h; duk_double_t d; duk_int_t tzoffset = 0; duk_push_this(thr); h = duk_get_hobject(thr, -1); /* XXX: getter with class check, useful in built-ins */ if (h == NULL || DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_DATE) { DUK_ERROR_TYPE(thr, "expected Date"); DUK_WO_NORETURN(return 0.0;); } duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_VALUE); d = duk_to_number_m1(thr); duk_pop(thr); if (DUK_ISNAN(d)) { if (flags & DUK_DATE_FLAG_NAN_TO_ZERO) { d = 0.0; } if (flags & DUK_DATE_FLAG_NAN_TO_RANGE_ERROR) { DUK_ERROR_RANGE(thr, "Invalid Date"); DUK_WO_NORETURN(return 0.0;); } } /* if no NaN handling flag, may still be NaN here, but not Inf */ DUK_ASSERT(!DUK_ISINF(d)); if (flags & DUK_DATE_FLAG_LOCALTIME) { /* Note: DST adjustment is determined using UTC time. * If 'd' is NaN, tzoffset will be 0. */ tzoffset = DUK_USE_DATE_GET_LOCAL_TZOFFSET(d); /* seconds */ d += tzoffset * 1000L; } if (out_tzoffset) { *out_tzoffset = tzoffset; } /* [ ... this ] */ return d; } DUK_LOCAL duk_double_t duk__push_this_get_timeval(duk_hthread *thr, duk_small_uint_t flags) { return duk__push_this_get_timeval_tzoffset(thr, flags, NULL); } /* Set timeval to 'this' from dparts, push the new time value onto the * value stack and return 1 (caller can then tail call us). Expects * the value stack to contain 'this' on the stack top. */ DUK_LOCAL duk_ret_t duk__set_this_timeval_from_dparts(duk_hthread *thr, duk_double_t *dparts, duk_small_uint_t flags) { duk_double_t d; /* [ ... this ] */ d = duk_bi_date_get_timeval_from_dparts(dparts, flags); duk_push_number(thr, d); /* -> [ ... this timeval_new ] */ duk_dup_top(thr); /* -> [ ... this timeval_new timeval_new ] */ /* Must force write because e.g. .setYear() must work even when * the Date instance is frozen. */ duk_xdef_prop_stridx_short(thr, -3, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_W); /* Stack top: new time value, return 1 to allow tail calls. */ return 1; } /* 'out_buf' must be at least DUK_BI_DATE_ISO8601_BUFSIZE long. */ DUK_LOCAL void duk__format_parts_iso8601(duk_int_t *parts, duk_int_t tzoffset, duk_small_uint_t flags, duk_uint8_t *out_buf) { char yearstr[8]; /* "-123456\0" */ char tzstr[8]; /* "+11:22\0" */ char sep = (flags & DUK_DATE_FLAG_SEP_T) ? DUK_ASC_UC_T : DUK_ASC_SPACE; DUK_ASSERT(parts[DUK_DATE_IDX_MONTH] >= 1 && parts[DUK_DATE_IDX_MONTH] <= 12); DUK_ASSERT(parts[DUK_DATE_IDX_DAY] >= 1 && parts[DUK_DATE_IDX_DAY] <= 31); DUK_ASSERT(parts[DUK_DATE_IDX_YEAR] >= -999999 && parts[DUK_DATE_IDX_YEAR] <= 999999); /* Note: %06d for positive value, %07d for negative value to include * sign and 6 digits. */ DUK_SNPRINTF(yearstr, sizeof(yearstr), (parts[DUK_DATE_IDX_YEAR] >= 0 && parts[DUK_DATE_IDX_YEAR] <= 9999) ? "%04ld" : ((parts[DUK_DATE_IDX_YEAR] >= 0) ? "+%06ld" : "%07ld"), (long) parts[DUK_DATE_IDX_YEAR]); yearstr[sizeof(yearstr) - 1] = (char) 0; if (flags & DUK_DATE_FLAG_LOCALTIME) { /* tzoffset seconds are dropped; 16 bits suffice for * time offset in minutes */ const char *fmt; duk_small_int_t tmp, arg_hours, arg_minutes; if (tzoffset >= 0) { tmp = tzoffset; fmt = "+%02d:%02d"; } else { tmp = -tzoffset; fmt = "-%02d:%02d"; } tmp = tmp / 60; arg_hours = tmp / 60; arg_minutes = tmp % 60; DUK_ASSERT(arg_hours <= 24); /* Even less is actually guaranteed for a valid tzoffset. */ arg_hours = arg_hours & 0x3f; /* For [0,24] this is a no-op, but fixes GCC 7 warning, see https://github.com/svaarala/duktape/issues/1602. */ DUK_SNPRINTF(tzstr, sizeof(tzstr), fmt, (int) arg_hours, (int) arg_minutes); tzstr[sizeof(tzstr) - 1] = (char) 0; } else { tzstr[0] = DUK_ASC_UC_Z; tzstr[1] = (char) 0; } /* Unlike year, the other parts fit into 16 bits so %d format * is portable. */ if ((flags & DUK_DATE_FLAG_TOSTRING_DATE) && (flags & DUK_DATE_FLAG_TOSTRING_TIME)) { DUK_SPRINTF((char *) out_buf, "%s-%02d-%02d%c%02d:%02d:%02d.%03d%s", (const char *) yearstr, (int) parts[DUK_DATE_IDX_MONTH], (int) parts[DUK_DATE_IDX_DAY], (int) sep, (int) parts[DUK_DATE_IDX_HOUR], (int) parts[DUK_DATE_IDX_MINUTE], (int) parts[DUK_DATE_IDX_SECOND], (int) parts[DUK_DATE_IDX_MILLISECOND], (const char *) tzstr); } else if (flags & DUK_DATE_FLAG_TOSTRING_DATE) { DUK_SPRINTF((char *) out_buf, "%s-%02d-%02d", (const char *) yearstr, (int) parts[DUK_DATE_IDX_MONTH], (int) parts[DUK_DATE_IDX_DAY]); } else { DUK_ASSERT(flags & DUK_DATE_FLAG_TOSTRING_TIME); DUK_SPRINTF((char *) out_buf, "%02d:%02d:%02d.%03d%s", (int) parts[DUK_DATE_IDX_HOUR], (int) parts[DUK_DATE_IDX_MINUTE], (int) parts[DUK_DATE_IDX_SECOND], (int) parts[DUK_DATE_IDX_MILLISECOND], (const char *) tzstr); } } /* Helper for string conversion calls: check 'this' binding, get the * internal time value, and format date and/or time in a few formats. * Return value allows tail calls. */ DUK_LOCAL duk_ret_t duk__to_string_helper(duk_hthread *thr, duk_small_uint_t flags) { duk_double_t d; duk_int_t parts[DUK_DATE_IDX_NUM_PARTS]; duk_int_t tzoffset; /* seconds, doesn't fit into 16 bits */ duk_bool_t rc; duk_uint8_t buf[DUK_BI_DATE_ISO8601_BUFSIZE]; DUK_UNREF(rc); /* unreferenced with some options */ d = duk__push_this_get_timeval_tzoffset(thr, flags, &tzoffset); if (DUK_ISNAN(d)) { duk_push_hstring_stridx(thr, DUK_STRIDX_INVALID_DATE); return 1; } DUK_ASSERT(DUK_ISFINITE(d)); /* formatters always get one-based month/day-of-month */ duk_bi_date_timeval_to_parts(d, parts, NULL, DUK_DATE_FLAG_ONEBASED); DUK_ASSERT(parts[DUK_DATE_IDX_MONTH] >= 1 && parts[DUK_DATE_IDX_MONTH] <= 12); DUK_ASSERT(parts[DUK_DATE_IDX_DAY] >= 1 && parts[DUK_DATE_IDX_DAY] <= 31); if (flags & DUK_DATE_FLAG_TOSTRING_LOCALE) { /* try locale specific formatter; if it refuses to format the * string, fall back to an ISO 8601 formatted value in local * time. */ #if defined(DUK_USE_DATE_FORMAT_STRING) /* Contract, either: * - Push string to value stack and return 1 * - Don't push anything and return 0 */ rc = DUK_USE_DATE_FORMAT_STRING(thr, parts, tzoffset, flags); if (rc != 0) { return 1; } #else /* No locale specific formatter; this is OK, we fall back * to ISO 8601. */ #endif } /* Different calling convention than above used because the helper * is shared. */ duk__format_parts_iso8601(parts, tzoffset, flags, buf); duk_push_string(thr, (const char *) buf); return 1; } /* Helper for component getter calls: check 'this' binding, get the * internal time value, split it into parts (either as UTC time or * local time), push a specified component as a return value to the * value stack and return 1 (caller can then tail call us). */ DUK_LOCAL duk_ret_t duk__get_part_helper(duk_hthread *thr, duk_small_uint_t flags_and_idx) { duk_double_t d; duk_int_t parts[DUK_DATE_IDX_NUM_PARTS]; duk_small_uint_t idx_part = (duk_small_uint_t) (flags_and_idx >> DUK_DATE_FLAG_VALUE_SHIFT); /* unpack args */ DUK_ASSERT_DISABLE(idx_part >= 0); /* unsigned */ DUK_ASSERT(idx_part < DUK_DATE_IDX_NUM_PARTS); d = duk__push_this_get_timeval(thr, flags_and_idx); if (DUK_ISNAN(d)) { duk_push_nan(thr); return 1; } DUK_ASSERT(DUK_ISFINITE(d)); duk_bi_date_timeval_to_parts(d, parts, NULL, flags_and_idx); /* no need to mask idx portion */ /* Setter APIs detect special year numbers (0...99) and apply a +1900 * only in certain cases. The legacy getYear() getter applies -1900 * unconditionally. */ duk_push_int(thr, (flags_and_idx & DUK_DATE_FLAG_SUB1900) ? parts[idx_part] - 1900 : parts[idx_part]); return 1; } /* Helper for component setter calls: check 'this' binding, get the * internal time value, split it into parts (either as UTC time or * local time), modify one or more components as specified, recompute * the time value, set it as the internal value. Finally, push the * new time value as a return value to the value stack and return 1 * (caller can then tail call us). */ DUK_LOCAL duk_ret_t duk__set_part_helper(duk_hthread *thr, duk_small_uint_t flags_and_maxnargs) { duk_double_t d; duk_int_t parts[DUK_DATE_IDX_NUM_PARTS]; duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS]; duk_idx_t nargs; duk_small_uint_t maxnargs = (duk_small_uint_t) (flags_and_maxnargs >> DUK_DATE_FLAG_VALUE_SHIFT); /* unpack args */ duk_small_uint_t idx_first, idx; duk_small_uint_t i; nargs = duk_get_top(thr); d = duk__push_this_get_timeval(thr, flags_and_maxnargs); DUK_ASSERT(DUK_ISFINITE(d) || DUK_ISNAN(d)); if (DUK_ISFINITE(d)) { duk_bi_date_timeval_to_parts(d, parts, dparts, flags_and_maxnargs); } else { /* NaN timevalue: we need to coerce the arguments, but * the resulting internal timestamp needs to remain NaN. * This works but is not pretty: parts and dparts will * be partially uninitialized, but we only write to them. */ } /* * Determining which datetime components to overwrite based on * stack arguments is a bit complicated, but important to factor * out from setters themselves for compactness. * * If DUK_DATE_FLAG_TIMESETTER, maxnargs indicates setter type: * * 1 -> millisecond * 2 -> second, [millisecond] * 3 -> minute, [second], [millisecond] * 4 -> hour, [minute], [second], [millisecond] * * Else: * * 1 -> date * 2 -> month, [date] * 3 -> year, [month], [date] * * By comparing nargs and maxnargs (and flags) we know which * components to override. We rely on part index ordering. */ if (flags_and_maxnargs & DUK_DATE_FLAG_TIMESETTER) { DUK_ASSERT(maxnargs >= 1 && maxnargs <= 4); idx_first = DUK_DATE_IDX_MILLISECOND - (maxnargs - 1); } else { DUK_ASSERT(maxnargs >= 1 && maxnargs <= 3); idx_first = DUK_DATE_IDX_DAY - (maxnargs - 1); } DUK_ASSERT_DISABLE(idx_first >= 0); /* unsigned */ DUK_ASSERT(idx_first < DUK_DATE_IDX_NUM_PARTS); for (i = 0; i < maxnargs; i++) { if ((duk_idx_t) i >= nargs) { /* no argument given -> leave components untouched */ break; } idx = idx_first + i; DUK_ASSERT_DISABLE(idx >= 0); /* unsigned */ DUK_ASSERT(idx < DUK_DATE_IDX_NUM_PARTS); if (idx == DUK_DATE_IDX_YEAR && (flags_and_maxnargs & DUK_DATE_FLAG_YEAR_FIXUP)) { duk__twodigit_year_fixup(thr, (duk_idx_t) i); } dparts[idx] = duk_to_number(thr, (duk_idx_t) i); if (idx == DUK_DATE_IDX_DAY) { /* Day-of-month is one-based in the API, but zero-based * internally, so fix here. Note that month is zero-based * both in the API and internally. */ /* SCANBUILD: complains about use of uninitialized values. * The complaint is correct, but operating in undefined * values here is intentional in some cases and the caller * ignores the results. */ dparts[idx] -= 1.0; } } /* Leaves new timevalue on stack top and returns 1, which is correct * for part setters. */ if (DUK_ISFINITE(d)) { return duk__set_this_timeval_from_dparts(thr, dparts, flags_and_maxnargs); } else { /* Internal timevalue is already NaN, so don't touch it. */ duk_push_nan(thr); return 1; } } /* Apply ToNumber() to specified index; if ToInteger(val) in [0,99], add * 1900 and replace value at idx_val. */ DUK_LOCAL void duk__twodigit_year_fixup(duk_hthread *thr, duk_idx_t idx_val) { duk_double_t d; /* XXX: idx_val would fit into 16 bits, but using duk_small_uint_t * might not generate better code due to casting. */ /* E5 Sections 15.9.3.1, B.2.4, B.2.5 */ duk_to_number(thr, idx_val); if (duk_is_nan(thr, idx_val)) { return; } duk_dup(thr, idx_val); duk_to_int(thr, -1); d = duk_get_number(thr, -1); /* get as double to handle huge numbers correctly */ if (d >= 0.0 && d <= 99.0) { d += 1900.0; duk_push_number(thr, d); duk_replace(thr, idx_val); } duk_pop(thr); } /* Set datetime parts from stack arguments, defaulting any missing values. * Day-of-week is not set; it is not required when setting the time value. */ DUK_LOCAL void duk__set_parts_from_args(duk_hthread *thr, duk_double_t *dparts, duk_idx_t nargs) { duk_double_t d; duk_small_uint_t i; duk_small_uint_t idx; /* Causes a ToNumber() coercion, but doesn't break coercion order since * year is coerced first anyway. */ duk__twodigit_year_fixup(thr, 0); /* There are at most 7 args, but we use 8 here so that also * DUK_DATE_IDX_WEEKDAY gets initialized (to zero) to avoid the potential * for any Valgrind gripes later. */ for (i = 0; i < 8; i++) { /* Note: rely on index ordering */ idx = DUK_DATE_IDX_YEAR + i; if ((duk_idx_t) i < nargs) { d = duk_to_number(thr, (duk_idx_t) i); if (idx == DUK_DATE_IDX_DAY) { /* Convert day from one-based to zero-based (internal). This may * cause the day part to be negative, which is OK. */ d -= 1.0; } } else { /* All components default to 0 except day-of-month which defaults * to 1. However, because our internal day-of-month is zero-based, * it also defaults to zero here. */ d = 0.0; } dparts[idx] = d; } DUK_DDD(DUK_DDDPRINT("parts from args -> %lf %lf %lf %lf %lf %lf %lf %lf", (double) dparts[0], (double) dparts[1], (double) dparts[2], (double) dparts[3], (double) dparts[4], (double) dparts[5], (double) dparts[6], (double) dparts[7])); } /* * Indirect magic value lookup for Date methods. * * Date methods don't put their control flags into the function magic value * because they wouldn't fit into a LIGHTFUNC's magic field. Instead, the * magic value is set to an index pointing to the array of control flags * below. * * This must be kept in strict sync with genbuiltins.py! */ static duk_uint16_t duk__date_magics[] = { /* 0: toString */ DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_LOCALTIME, /* 1: toDateString */ DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_LOCALTIME, /* 2: toTimeString */ DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_LOCALTIME, /* 3: toLocaleString */ DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_TOSTRING_LOCALE + DUK_DATE_FLAG_LOCALTIME, /* 4: toLocaleDateString */ DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_LOCALE + DUK_DATE_FLAG_LOCALTIME, /* 5: toLocaleTimeString */ DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_TOSTRING_LOCALE + DUK_DATE_FLAG_LOCALTIME, /* 6: toUTCString */ DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_TIME, /* 7: toISOString */ DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_NAN_TO_RANGE_ERROR + DUK_DATE_FLAG_SEP_T, /* 8: getFullYear */ DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_YEAR << DUK_DATE_FLAG_VALUE_SHIFT), /* 9: getUTCFullYear */ 0 + (DUK_DATE_IDX_YEAR << DUK_DATE_FLAG_VALUE_SHIFT), /* 10: getMonth */ DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_MONTH << DUK_DATE_FLAG_VALUE_SHIFT), /* 11: getUTCMonth */ 0 + (DUK_DATE_IDX_MONTH << DUK_DATE_FLAG_VALUE_SHIFT), /* 12: getDate */ DUK_DATE_FLAG_ONEBASED + DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_DAY << DUK_DATE_FLAG_VALUE_SHIFT), /* 13: getUTCDate */ DUK_DATE_FLAG_ONEBASED + (DUK_DATE_IDX_DAY << DUK_DATE_FLAG_VALUE_SHIFT), /* 14: getDay */ DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_WEEKDAY << DUK_DATE_FLAG_VALUE_SHIFT), /* 15: getUTCDay */ 0 + (DUK_DATE_IDX_WEEKDAY << DUK_DATE_FLAG_VALUE_SHIFT), /* 16: getHours */ DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_HOUR << DUK_DATE_FLAG_VALUE_SHIFT), /* 17: getUTCHours */ 0 + (DUK_DATE_IDX_HOUR << DUK_DATE_FLAG_VALUE_SHIFT), /* 18: getMinutes */ DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_MINUTE << DUK_DATE_FLAG_VALUE_SHIFT), /* 19: getUTCMinutes */ 0 + (DUK_DATE_IDX_MINUTE << DUK_DATE_FLAG_VALUE_SHIFT), /* 20: getSeconds */ DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_SECOND << DUK_DATE_FLAG_VALUE_SHIFT), /* 21: getUTCSeconds */ 0 + (DUK_DATE_IDX_SECOND << DUK_DATE_FLAG_VALUE_SHIFT), /* 22: getMilliseconds */ DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_MILLISECOND << DUK_DATE_FLAG_VALUE_SHIFT), /* 23: getUTCMilliseconds */ 0 + (DUK_DATE_IDX_MILLISECOND << DUK_DATE_FLAG_VALUE_SHIFT), /* 24: setMilliseconds */ DUK_DATE_FLAG_TIMESETTER + DUK_DATE_FLAG_LOCALTIME + (1 << DUK_DATE_FLAG_VALUE_SHIFT), /* 25: setUTCMilliseconds */ DUK_DATE_FLAG_TIMESETTER + (1 << DUK_DATE_FLAG_VALUE_SHIFT), /* 26: setSeconds */ DUK_DATE_FLAG_TIMESETTER + DUK_DATE_FLAG_LOCALTIME + (2 << DUK_DATE_FLAG_VALUE_SHIFT), /* 27: setUTCSeconds */ DUK_DATE_FLAG_TIMESETTER + (2 << DUK_DATE_FLAG_VALUE_SHIFT), /* 28: setMinutes */ DUK_DATE_FLAG_TIMESETTER + DUK_DATE_FLAG_LOCALTIME + (3 << DUK_DATE_FLAG_VALUE_SHIFT), /* 29: setUTCMinutes */ DUK_DATE_FLAG_TIMESETTER + (3 << DUK_DATE_FLAG_VALUE_SHIFT), /* 30: setHours */ DUK_DATE_FLAG_TIMESETTER + DUK_DATE_FLAG_LOCALTIME + (4 << DUK_DATE_FLAG_VALUE_SHIFT), /* 31: setUTCHours */ DUK_DATE_FLAG_TIMESETTER + (4 << DUK_DATE_FLAG_VALUE_SHIFT), /* 32: setDate */ DUK_DATE_FLAG_LOCALTIME + (1 << DUK_DATE_FLAG_VALUE_SHIFT), /* 33: setUTCDate */ 0 + (1 << DUK_DATE_FLAG_VALUE_SHIFT), /* 34: setMonth */ DUK_DATE_FLAG_LOCALTIME + (2 << DUK_DATE_FLAG_VALUE_SHIFT), /* 35: setUTCMonth */ 0 + (2 << DUK_DATE_FLAG_VALUE_SHIFT), /* 36: setFullYear */ DUK_DATE_FLAG_NAN_TO_ZERO + DUK_DATE_FLAG_LOCALTIME + (3 << DUK_DATE_FLAG_VALUE_SHIFT), /* 37: setUTCFullYear */ DUK_DATE_FLAG_NAN_TO_ZERO + (3 << DUK_DATE_FLAG_VALUE_SHIFT), /* 38: getYear */ DUK_DATE_FLAG_LOCALTIME + DUK_DATE_FLAG_SUB1900 + (DUK_DATE_IDX_YEAR << DUK_DATE_FLAG_VALUE_SHIFT), /* 39: setYear */ DUK_DATE_FLAG_NAN_TO_ZERO + DUK_DATE_FLAG_YEAR_FIXUP + (3 << DUK_DATE_FLAG_VALUE_SHIFT), }; DUK_LOCAL duk_small_uint_t duk__date_get_indirect_magic(duk_hthread *thr) { duk_small_uint_t magicidx = (duk_small_uint_t) duk_get_current_magic(thr); DUK_ASSERT(magicidx < (duk_small_int_t) (sizeof(duk__date_magics) / sizeof(duk_uint16_t))); return (duk_small_uint_t) duk__date_magics[magicidx]; } #if defined(DUK_USE_DATE_BUILTIN) /* * Constructor calls */ DUK_INTERNAL duk_ret_t duk_bi_date_constructor(duk_hthread *thr) { duk_idx_t nargs = duk_get_top(thr); duk_bool_t is_cons = duk_is_constructor_call(thr); duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS]; duk_double_t d; DUK_DDD(DUK_DDDPRINT("Date constructor, nargs=%ld, is_cons=%ld", (long) nargs, (long) is_cons)); (void) duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DATE), DUK_BIDX_DATE_PROTOTYPE); /* Unlike most built-ins, the internal [[PrimitiveValue]] of a Date * is mutable. */ if (nargs == 0 || !is_cons) { d = duk__timeclip(duk_time_get_ecmascript_time_nofrac(thr)); duk_push_number(thr, d); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_W); if (!is_cons) { /* called as a normal function: return new Date().toString() */ duk_to_string(thr, -1); } return 1; } else if (nargs == 1) { const char *str; duk_to_primitive(thr, 0, DUK_HINT_NONE); str = duk_get_string_notsymbol(thr, 0); if (str) { duk__parse_string(thr, str); duk_replace(thr, 0); /* may be NaN */ } d = duk__timeclip(duk_to_number(thr, 0)); /* symbols fail here */ duk_push_number(thr, d); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_W); return 1; } duk__set_parts_from_args(thr, dparts, nargs); /* Parts are in local time, convert when setting. */ (void) duk__set_this_timeval_from_dparts(thr, dparts, DUK_DATE_FLAG_LOCALTIME /*flags*/); /* -> [ ... this timeval ] */ duk_pop(thr); /* -> [ ... this ] */ return 1; } DUK_INTERNAL duk_ret_t duk_bi_date_constructor_parse(duk_hthread *thr) { return duk__parse_string(thr, duk_to_string(thr, 0)); } DUK_INTERNAL duk_ret_t duk_bi_date_constructor_utc(duk_hthread *thr) { duk_idx_t nargs = duk_get_top(thr); duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS]; duk_double_t d; /* Behavior for nargs < 2 is implementation dependent: currently we'll * set a NaN time value (matching V8 behavior) in this case. */ if (nargs < 2) { duk_push_nan(thr); } else { duk__set_parts_from_args(thr, dparts, nargs); d = duk_bi_date_get_timeval_from_dparts(dparts, 0 /*flags*/); duk_push_number(thr, d); } return 1; } DUK_INTERNAL duk_ret_t duk_bi_date_constructor_now(duk_hthread *thr) { duk_double_t d; d = duk_time_get_ecmascript_time_nofrac(thr); DUK_ASSERT(duk__timeclip(d) == d); /* TimeClip() should never be necessary */ duk_push_number(thr, d); return 1; } /* * String/JSON conversions * * Human readable conversions are now basically ISO 8601 with a space * (instead of 'T') as the date/time separator. This is a good baseline * and is platform independent. * * A shared native helper to provide many conversions. Magic value contains * a set of flags. The helper provides: * * toString() * toDateString() * toTimeString() * toLocaleString() * toLocaleDateString() * toLocaleTimeString() * toUTCString() * toISOString() * * Notes: * * - Date.prototype.toGMTString() and Date.prototype.toUTCString() are * required to be the same ECMAScript function object (!), so it is * omitted from here. * * - Date.prototype.toUTCString(): E5.1 specification does not require a * specific format, but result should be human readable. The * specification suggests using ISO 8601 format with a space (instead * of 'T') separator if a more human readable format is not available. * * - Date.prototype.toISOString(): unlike other conversion functions, * toISOString() requires a RangeError for invalid date values. */ DUK_INTERNAL duk_ret_t duk_bi_date_prototype_tostring_shared(duk_hthread *thr) { duk_small_uint_t flags = duk__date_get_indirect_magic(thr); return duk__to_string_helper(thr, flags); } DUK_INTERNAL duk_ret_t duk_bi_date_prototype_value_of(duk_hthread *thr) { /* This native function is also used for Date.prototype.getTime() * as their behavior is identical. */ duk_double_t d = duk__push_this_get_timeval(thr, 0 /*flags*/); /* -> [ this ] */ DUK_ASSERT(DUK_ISFINITE(d) || DUK_ISNAN(d)); duk_push_number(thr, d); return 1; } DUK_INTERNAL duk_ret_t duk_bi_date_prototype_to_json(duk_hthread *thr) { /* Note: toJSON() is a generic function which works even if 'this' * is not a Date. The sole argument is ignored. */ duk_push_this(thr); duk_to_object(thr, -1); duk_dup_top(thr); duk_to_primitive(thr, -1, DUK_HINT_NUMBER); if (duk_is_number(thr, -1)) { duk_double_t d = duk_get_number(thr, -1); if (!DUK_ISFINITE(d)) { duk_push_null(thr); return 1; } } duk_pop(thr); duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_TO_ISO_STRING); duk_dup_m2(thr); /* -> [ O toIsoString O ] */ duk_call_method(thr, 0); return 1; } /* * Getters. * * Implementing getters is quite easy. The internal time value is either * NaN, or represents milliseconds (without fractions) from Jan 1, 1970. * The internal time value can be converted to integer parts, and each * part will be normalized and will fit into a 32-bit signed integer. * * A shared native helper to provide all getters. Magic value contains * a set of flags and also packs the date component index argument. The * helper provides: * * getFullYear() * getUTCFullYear() * getMonth() * getUTCMonth() * getDate() * getUTCDate() * getDay() * getUTCDay() * getHours() * getUTCHours() * getMinutes() * getUTCMinutes() * getSeconds() * getUTCSeconds() * getMilliseconds() * getUTCMilliseconds() * getYear() * * Notes: * * - Date.prototype.getDate(): 'date' means day-of-month, and is * zero-based in internal calculations but public API expects it to * be one-based. * * - Date.prototype.getTime() and Date.prototype.valueOf() have identical * behavior. They have separate function objects, but share the same C * function (duk_bi_date_prototype_value_of). */ DUK_INTERNAL duk_ret_t duk_bi_date_prototype_get_shared(duk_hthread *thr) { duk_small_uint_t flags_and_idx = duk__date_get_indirect_magic(thr); return duk__get_part_helper(thr, flags_and_idx); } DUK_INTERNAL duk_ret_t duk_bi_date_prototype_get_timezone_offset(duk_hthread *thr) { /* * Return (t - LocalTime(t)) in minutes: * * t - LocalTime(t) = t - (t + LocalTZA + DaylightSavingTA(t)) * = -(LocalTZA + DaylightSavingTA(t)) * * where DaylightSavingTA() is checked for time 't'. * * Note that the sign of the result is opposite to common usage, * e.g. for EE(S)T which normally is +2h or +3h from UTC, this * function returns -120 or -180. * */ duk_double_t d; duk_int_t tzoffset; /* Note: DST adjustment is determined using UTC time. */ d = duk__push_this_get_timeval(thr, 0 /*flags*/); DUK_ASSERT(DUK_ISFINITE(d) || DUK_ISNAN(d)); if (DUK_ISNAN(d)) { duk_push_nan(thr); } else { DUK_ASSERT(DUK_ISFINITE(d)); tzoffset = DUK_USE_DATE_GET_LOCAL_TZOFFSET(d); duk_push_int(thr, -tzoffset / 60); } return 1; } /* * Setters. * * Setters are a bit more complicated than getters. Component setters * break down the current time value into its (normalized) component * parts, replace one or more components with -unnormalized- new values, * and the components are then converted back into a time value. As an * example of using unnormalized values: * * var d = new Date(1234567890); * * is equivalent to: * * var d = new Date(0); * d.setUTCMilliseconds(1234567890); * * A shared native helper to provide almost all setters. Magic value * contains a set of flags and also packs the "maxnargs" argument. The * helper provides: * * setMilliseconds() * setUTCMilliseconds() * setSeconds() * setUTCSeconds() * setMinutes() * setUTCMinutes() * setHours() * setUTCHours() * setDate() * setUTCDate() * setMonth() * setUTCMonth() * setFullYear() * setUTCFullYear() * setYear() * * Notes: * * - Date.prototype.setYear() (Section B addition): special year check * is omitted. NaN / Infinity will just flow through and ultimately * result in a NaN internal time value. * * - Date.prototype.setYear() does not have optional arguments for * setting month and day-in-month (like setFullYear()), but we indicate * 'maxnargs' to be 3 to get the year written to the correct component * index in duk__set_part_helper(). The function has nargs == 1, so only * the year will be set regardless of actual argument count. */ DUK_INTERNAL duk_ret_t duk_bi_date_prototype_set_shared(duk_hthread *thr) { duk_small_uint_t flags_and_maxnargs = duk__date_get_indirect_magic(thr); return duk__set_part_helper(thr, flags_and_maxnargs); } DUK_INTERNAL duk_ret_t duk_bi_date_prototype_set_time(duk_hthread *thr) { duk_double_t d; (void) duk__push_this_get_timeval(thr, 0 /*flags*/); /* -> [ timeval this ] */ d = duk__timeclip(duk_to_number(thr, 0)); duk_push_number(thr, d); duk_dup_top(thr); /* Must force write because .setTime() must work even when * the Date instance is frozen. */ duk_xdef_prop_stridx_short(thr, -3, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_W); /* -> [ timeval this timeval ] */ return 1; } /* * Misc. */ #if defined(DUK_USE_SYMBOL_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_date_prototype_toprimitive(duk_hthread *thr) { duk_size_t hintlen; const char *hintstr; duk_int_t hint; /* Invokes OrdinaryToPrimitive() with suitable hint. Note that the * method is generic, and works on non-Date arguments too. * * https://www.ecma-international.org/ecma-262/6.0/#sec-date.prototype-@@toprimitive */ duk_push_this(thr); duk_require_object(thr, -1); DUK_ASSERT_TOP(thr, 2); hintstr = duk_require_lstring(thr, 0, &hintlen); if ((hintlen == 6 && DUK_STRCMP(hintstr, "string") == 0) || (hintlen == 7 && DUK_STRCMP(hintstr, "default") == 0)) { hint = DUK_HINT_STRING; } else if (hintlen == 6 && DUK_STRCMP(hintstr, "number") == 0) { hint = DUK_HINT_NUMBER; } else { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } duk_to_primitive_ordinary(thr, -1, hint); return 1; } #endif /* DUK_USE_SYMBOL_BUILTIN */ #endif /* DUK_USE_DATE_BUILTIN */ /* automatic undefs */ #undef DUK__CF_ACCEPT #undef DUK__CF_ACCEPT_NUL #undef DUK__CF_NEG #undef DUK__DPRINT_DPARTS #undef DUK__DPRINT_PARTS #undef DUK__DPRINT_PARTS_AND_DPARTS #undef DUK__LOCAL_TZOFFSET_MAXITER #undef DUK__NUM_ISO8601_PARSER_PARTS #undef DUK__PACK_RULE #undef DUK__PI_DAY #undef DUK__PI_HOUR #undef DUK__PI_MILLISECOND #undef DUK__PI_MINUTE #undef DUK__PI_MONTH #undef DUK__PI_SECOND #undef DUK__PI_TZHOUR #undef DUK__PI_TZMINUTE #undef DUK__PI_YEAR #undef DUK__PM_DAY #undef DUK__PM_HOUR #undef DUK__PM_MILLISECOND #undef DUK__PM_MINUTE #undef DUK__PM_MONTH #undef DUK__PM_SECOND #undef DUK__PM_TZHOUR #undef DUK__PM_TZMINUTE #undef DUK__PM_YEAR #undef DUK__RULE_MASK_PART_SEP #undef DUK__SI_COLON #undef DUK__SI_MINUS #undef DUK__SI_NUL #undef DUK__SI_PERIOD #undef DUK__SI_PLUS #undef DUK__SI_SPACE #undef DUK__SI_T #undef DUK__SI_Z #undef DUK__SM_COLON #undef DUK__SM_MINUS #undef DUK__SM_NUL #undef DUK__SM_PERIOD #undef DUK__SM_PLUS #undef DUK__SM_SPACE #undef DUK__SM_T #undef DUK__SM_Z #undef DUK__UNPACK_RULE #undef DUK__WEEKDAY_MOD_ADDER #undef DUK__YEAR /* * Unix-like Date providers * * Generally useful Unix / POSIX / ANSI Date providers. */ /* #include duk_internal.h -> already included */ /* The necessary #includes are in place in duk_config.h. */ /* Buffer sizes for some UNIX calls. Larger than strictly necessary * to avoid Valgrind errors. */ #define DUK__STRPTIME_BUF_SIZE 64 #define DUK__STRFTIME_BUF_SIZE 64 #if defined(DUK_USE_DATE_NOW_GETTIMEOFDAY) /* Get current ECMAScript time (= UNIX/Posix time, but in milliseconds). */ DUK_INTERNAL duk_double_t duk_bi_date_get_now_gettimeofday(void) { struct timeval tv; duk_double_t d; if (gettimeofday(&tv, NULL) != 0) { DUK_D(DUK_DPRINT("gettimeofday() failed")); return 0.0; } /* As of Duktape 2.2.0 allow fractions. */ d = ((duk_double_t) tv.tv_sec) * 1000.0 + ((duk_double_t) tv.tv_usec) / 1000.0; return d; } #endif /* DUK_USE_DATE_NOW_GETTIMEOFDAY */ #if defined(DUK_USE_DATE_NOW_TIME) /* Not a very good provider: only full seconds are available. */ DUK_INTERNAL duk_double_t duk_bi_date_get_now_time(void) { time_t t; t = time(NULL); if (t == (time_t) -1) { DUK_D(DUK_DPRINT("time() failed")); return 0.0; } return ((duk_double_t) t) * 1000.0; } #endif /* DUK_USE_DATE_NOW_TIME */ #if defined(DUK_USE_DATE_TZO_GMTIME) || defined(DUK_USE_DATE_TZO_GMTIME_R) || defined(DUK_USE_DATE_TZO_GMTIME_S) /* Get local time offset (in seconds) for a certain (UTC) instant 'd'. */ DUK_INTERNAL duk_int_t duk_bi_date_get_local_tzoffset_gmtime(duk_double_t d) { time_t t, t1, t2; duk_int_t parts[DUK_DATE_IDX_NUM_PARTS]; duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS]; struct tm tms[2]; #if defined(DUK_USE_DATE_TZO_GMTIME) struct tm *tm_ptr; #endif /* For NaN/inf, the return value doesn't matter. */ if (!DUK_ISFINITE(d)) { return 0; } /* If not within ECMAScript range, some integer time calculations * won't work correctly (and some asserts will fail), so bail out * if so. This fixes test-bug-date-insane-setyear.js. There is * a +/- 24h leeway in this range check to avoid a test262 corner * case documented in test-bug-date-timeval-edges.js. */ if (!duk_bi_date_timeval_in_leeway_range(d)) { DUK_DD(DUK_DDPRINT("timeval not within valid range, skip tzoffset computation to avoid integer overflows")); return 0; } /* * This is a bit tricky to implement portably. The result depends * on the timestamp (specifically, DST depends on the timestamp). * If e.g. UNIX APIs are used, they'll have portability issues with * very small and very large years. * * Current approach: * * - Stay within portable UNIX limits by using equivalent year mapping. * Avoid year 1970 and 2038 as some conversions start to fail, at * least on some platforms. Avoiding 1970 means that there are * currently DST discrepancies for 1970. * * - Create a UTC and local time breakdowns from 't'. Then create * a time_t using gmtime() and localtime() and compute the time * difference between the two. * * Equivalent year mapping (E5 Section 15.9.1.8): * * If the host environment provides functionality for determining * daylight saving time, the implementation of ECMAScript is free * to map the year in question to an equivalent year (same * leap-year-ness and same starting week day for the year) for which * the host environment provides daylight saving time information. * The only restriction is that all equivalent years should produce * the same result. * * This approach is quite reasonable but not entirely correct, e.g. * the specification also states (E5 Section 15.9.1.8): * * The implementation of ECMAScript should not try to determine * whether the exact time was subject to daylight saving time, but * just whether daylight saving time would have been in effect if * the _current daylight saving time algorithm_ had been used at the * time. This avoids complications such as taking into account the * years that the locale observed daylight saving time year round. * * Since we rely on the platform APIs for conversions between local * time and UTC, we can't guarantee the above. Rather, if the platform * has historical DST rules they will be applied. This seems to be the * general preferred direction in ECMAScript standardization (or at least * implementations) anyway, and even the equivalent year mapping should * be disabled if the platform is known to handle DST properly for the * full ECMAScript range. * * The following has useful discussion and links: * * https://bugzilla.mozilla.org/show_bug.cgi?id=351066 */ duk_bi_date_timeval_to_parts(d, parts, dparts, DUK_DATE_FLAG_EQUIVYEAR /*flags*/); DUK_ASSERT(parts[DUK_DATE_IDX_YEAR] >= 1970 && parts[DUK_DATE_IDX_YEAR] <= 2038); d = duk_bi_date_get_timeval_from_dparts(dparts, 0 /*flags*/); DUK_ASSERT(d >= 0 && d < 2147483648.0 * 1000.0); /* unsigned 31-bit range */ t = (time_t) (d / 1000.0); DUK_DDD(DUK_DDDPRINT("timeval: %lf -> time_t %ld", (double) d, (long) t)); duk_memzero((void *) tms, sizeof(struct tm) * 2); #if defined(DUK_USE_DATE_TZO_GMTIME_R) (void) gmtime_r(&t, &tms[0]); (void) localtime_r(&t, &tms[1]); #elif defined(DUK_USE_DATE_TZO_GMTIME_S) (void) gmtime_s(&t, &tms[0]); (void) localtime_s(&t, &tms[1]); #elif defined(DUK_USE_DATE_TZO_GMTIME) tm_ptr = gmtime(&t); duk_memcpy((void *) &tms[0], tm_ptr, sizeof(struct tm)); tm_ptr = localtime(&t); duk_memcpy((void *) &tms[1], tm_ptr, sizeof(struct tm)); #else #error internal error #endif DUK_DDD(DUK_DDDPRINT("gmtime result: tm={sec:%ld,min:%ld,hour:%ld,mday:%ld,mon:%ld,year:%ld," "wday:%ld,yday:%ld,isdst:%ld}", (long) tms[0].tm_sec, (long) tms[0].tm_min, (long) tms[0].tm_hour, (long) tms[0].tm_mday, (long) tms[0].tm_mon, (long) tms[0].tm_year, (long) tms[0].tm_wday, (long) tms[0].tm_yday, (long) tms[0].tm_isdst)); DUK_DDD(DUK_DDDPRINT("localtime result: tm={sec:%ld,min:%ld,hour:%ld,mday:%ld,mon:%ld,year:%ld," "wday:%ld,yday:%ld,isdst:%ld}", (long) tms[1].tm_sec, (long) tms[1].tm_min, (long) tms[1].tm_hour, (long) tms[1].tm_mday, (long) tms[1].tm_mon, (long) tms[1].tm_year, (long) tms[1].tm_wday, (long) tms[1].tm_yday, (long) tms[1].tm_isdst)); /* tm_isdst is both an input and an output to mktime(), use 0 to * avoid DST handling in mktime(): * - https://github.com/svaarala/duktape/issues/406 * - http://stackoverflow.com/questions/8558919/mktime-and-tm-isdst */ tms[0].tm_isdst = 0; tms[1].tm_isdst = 0; t1 = mktime(&tms[0]); /* UTC */ t2 = mktime(&tms[1]); /* local */ if (t1 == (time_t) -1 || t2 == (time_t) -1) { /* This check used to be for (t < 0) but on some platforms * time_t is unsigned and apparently the proper way to detect * an mktime() error return is the cast above. See e.g.: * http://pubs.opengroup.org/onlinepubs/009695299/functions/mktime.html */ goto mktime_error; } DUK_DDD(DUK_DDDPRINT("t1=%ld (utc), t2=%ld (local)", (long) t1, (long) t2)); /* Compute final offset in seconds, positive if local time ahead of * UTC (returned value is UTC-to-local offset). * * difftime() returns a double, so coercion to int generates quite * a lot of code. Direct subtraction is not portable, however. * XXX: allow direct subtraction on known platforms. */ #if 0 return (duk_int_t) (t2 - t1); #endif return (duk_int_t) difftime(t2, t1); mktime_error: /* XXX: return something more useful, so that caller can throw? */ DUK_D(DUK_DPRINT("mktime() failed, d=%lf", (double) d)); return 0; } #endif /* DUK_USE_DATE_TZO_GMTIME */ #if defined(DUK_USE_DATE_PRS_STRPTIME) DUK_INTERNAL duk_bool_t duk_bi_date_parse_string_strptime(duk_hthread *thr, const char *str) { struct tm tm; time_t t; char buf[DUK__STRPTIME_BUF_SIZE]; /* Copy to buffer with slack to avoid Valgrind gripes from strptime. */ DUK_ASSERT(str != NULL); duk_memzero(buf, sizeof(buf)); /* valgrind whine without this */ DUK_SNPRINTF(buf, sizeof(buf), "%s", (const char *) str); buf[sizeof(buf) - 1] = (char) 0; DUK_DDD(DUK_DDDPRINT("parsing: '%s'", (const char *) buf)); duk_memzero(&tm, sizeof(tm)); if (strptime((const char *) buf, "%c", &tm) != NULL) { DUK_DDD(DUK_DDDPRINT("before mktime: tm={sec:%ld,min:%ld,hour:%ld,mday:%ld,mon:%ld,year:%ld," "wday:%ld,yday:%ld,isdst:%ld}", (long) tm.tm_sec, (long) tm.tm_min, (long) tm.tm_hour, (long) tm.tm_mday, (long) tm.tm_mon, (long) tm.tm_year, (long) tm.tm_wday, (long) tm.tm_yday, (long) tm.tm_isdst)); tm.tm_isdst = -1; /* negative: dst info not available */ t = mktime(&tm); DUK_DDD(DUK_DDDPRINT("mktime() -> %ld", (long) t)); if (t >= 0) { duk_push_number(thr, ((duk_double_t) t) * 1000.0); return 1; } } return 0; } #endif /* DUK_USE_DATE_PRS_STRPTIME */ #if defined(DUK_USE_DATE_PRS_GETDATE) DUK_INTERNAL duk_bool_t duk_bi_date_parse_string_getdate(duk_hthread *thr, const char *str) { struct tm tm; duk_small_int_t rc; time_t t; /* For this to work, DATEMSK must be set, so this is not very * convenient for an embeddable interpreter. */ duk_memzero(&tm, sizeof(struct tm)); rc = (duk_small_int_t) getdate_r(str, &tm); DUK_DDD(DUK_DDDPRINT("getdate_r() -> %ld", (long) rc)); if (rc == 0) { t = mktime(&tm); DUK_DDD(DUK_DDDPRINT("mktime() -> %ld", (long) t)); if (t >= 0) { duk_push_number(thr, (duk_double_t) t); return 1; } } return 0; } #endif /* DUK_USE_DATE_PRS_GETDATE */ #if defined(DUK_USE_DATE_FMT_STRFTIME) DUK_INTERNAL duk_bool_t duk_bi_date_format_parts_strftime(duk_hthread *thr, duk_int_t *parts, duk_int_t tzoffset, duk_small_uint_t flags) { char buf[DUK__STRFTIME_BUF_SIZE]; struct tm tm; const char *fmt; DUK_UNREF(tzoffset); /* If the platform doesn't support the entire ECMAScript range, we need * to return 0 so that the caller can fall back to the default formatter. * * For now, assume that if time_t is 8 bytes or more, the whole ECMAScript * range is supported. For smaller time_t values (4 bytes in practice), * assumes that the signed 32-bit range is supported. * * XXX: detect this more correctly per platform. The size of time_t is * probably not an accurate guarantee of strftime() supporting or not * supporting a large time range (the full ECMAScript range). */ if (sizeof(time_t) < 8 && (parts[DUK_DATE_IDX_YEAR] < 1970 || parts[DUK_DATE_IDX_YEAR] > 2037)) { /* be paranoid for 32-bit time values (even avoiding negative ones) */ return 0; } duk_memzero(&tm, sizeof(tm)); tm.tm_sec = parts[DUK_DATE_IDX_SECOND]; tm.tm_min = parts[DUK_DATE_IDX_MINUTE]; tm.tm_hour = parts[DUK_DATE_IDX_HOUR]; tm.tm_mday = parts[DUK_DATE_IDX_DAY]; /* already one-based */ tm.tm_mon = parts[DUK_DATE_IDX_MONTH] - 1; /* one-based -> zero-based */ tm.tm_year = parts[DUK_DATE_IDX_YEAR] - 1900; tm.tm_wday = parts[DUK_DATE_IDX_WEEKDAY]; tm.tm_isdst = 0; duk_memzero(buf, sizeof(buf)); if ((flags & DUK_DATE_FLAG_TOSTRING_DATE) && (flags & DUK_DATE_FLAG_TOSTRING_TIME)) { fmt = "%c"; } else if (flags & DUK_DATE_FLAG_TOSTRING_DATE) { fmt = "%x"; } else { DUK_ASSERT(flags & DUK_DATE_FLAG_TOSTRING_TIME); fmt = "%X"; } (void) strftime(buf, sizeof(buf) - 1, fmt, &tm); DUK_ASSERT(buf[sizeof(buf) - 1] == 0); duk_push_string(thr, buf); return 1; } #endif /* DUK_USE_DATE_FMT_STRFTIME */ #if defined(DUK_USE_GET_MONOTONIC_TIME_CLOCK_GETTIME) DUK_INTERNAL duk_double_t duk_bi_date_get_monotonic_time_clock_gettime(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) { return (duk_double_t) ts.tv_sec * 1000.0 + (duk_double_t) ts.tv_nsec / 1000000.0; } else { DUK_D(DUK_DPRINT("clock_gettime(CLOCK_MONOTONIC) failed")); return 0.0; } } #endif /* automatic undefs */ #undef DUK__STRFTIME_BUF_SIZE #undef DUK__STRPTIME_BUF_SIZE /* * Windows Date providers * * Platform specific links: * * - http://msdn.microsoft.com/en-us/library/windows/desktop/ms725473(v=vs.85).aspx */ /* #include duk_internal.h -> already included */ /* The necessary #includes are in place in duk_config.h. */ #if defined(DUK_USE_DATE_NOW_WINDOWS) || defined(DUK_USE_DATE_TZO_WINDOWS) /* Shared Windows helpers. */ DUK_LOCAL void duk__convert_systime_to_ularge(const SYSTEMTIME *st, ULARGE_INTEGER *res) { FILETIME ft; if (SystemTimeToFileTime(st, &ft) == 0) { DUK_D(DUK_DPRINT("SystemTimeToFileTime() failed, returning 0")); res->QuadPart = 0; } else { res->LowPart = ft.dwLowDateTime; res->HighPart = ft.dwHighDateTime; } } #if defined(DUK_USE_DATE_NOW_WINDOWS_SUBMS) DUK_LOCAL void duk__convert_filetime_to_ularge(const FILETIME *ft, ULARGE_INTEGER *res) { res->LowPart = ft->dwLowDateTime; res->HighPart = ft->dwHighDateTime; } #endif /* DUK_USE_DATE_NOW_WINDOWS_SUBMS */ DUK_LOCAL void duk__set_systime_jan1970(SYSTEMTIME *st) { duk_memzero((void *) st, sizeof(*st)); st->wYear = 1970; st->wMonth = 1; st->wDayOfWeek = 4; /* not sure whether or not needed; Thursday */ st->wDay = 1; DUK_ASSERT(st->wHour == 0); DUK_ASSERT(st->wMinute == 0); DUK_ASSERT(st->wSecond == 0); DUK_ASSERT(st->wMilliseconds == 0); } #endif /* defined(DUK_USE_DATE_NOW_WINDOWS) || defined(DUK_USE_DATE_TZO_WINDOWS) */ #if defined(DUK_USE_DATE_NOW_WINDOWS) DUK_INTERNAL duk_double_t duk_bi_date_get_now_windows(void) { /* Suggested step-by-step method from documentation of RtlTimeToSecondsSince1970: * http://msdn.microsoft.com/en-us/library/windows/desktop/ms724928(v=vs.85).aspx */ SYSTEMTIME st1, st2; ULARGE_INTEGER tmp1, tmp2; GetSystemTime(&st1); duk__convert_systime_to_ularge((const SYSTEMTIME *) &st1, &tmp1); duk__set_systime_jan1970(&st2); duk__convert_systime_to_ularge((const SYSTEMTIME *) &st2, &tmp2); /* Difference is in 100ns units, convert to milliseconds, keeping * fractions since Duktape 2.2.0. This is only theoretical because * SYSTEMTIME is limited to milliseconds. */ return (duk_double_t) ((LONGLONG) tmp1.QuadPart - (LONGLONG) tmp2.QuadPart) / 10000.0; } #endif /* DUK_USE_DATE_NOW_WINDOWS */ #if defined(DUK_USE_DATE_NOW_WINDOWS_SUBMS) DUK_INTERNAL duk_double_t duk_bi_date_get_now_windows_subms(void) { /* Variant of the basic algorithm using GetSystemTimePreciseAsFileTime() * for more accuracy. */ FILETIME ft1; SYSTEMTIME st2; ULARGE_INTEGER tmp1, tmp2; GetSystemTimePreciseAsFileTime(&ft1); duk__convert_filetime_to_ularge((const FILETIME *) &ft1, &tmp1); duk__set_systime_jan1970(&st2); duk__convert_systime_to_ularge((const SYSTEMTIME *) &st2, &tmp2); /* Difference is in 100ns units, convert to milliseconds, keeping * fractions since Duktape 2.2.0. */ return (duk_double_t) ((LONGLONG) tmp1.QuadPart - (LONGLONG) tmp2.QuadPart) / 10000.0; } #endif /* DUK_USE_DATE_NOW_WINDOWS */ #if defined(DUK_USE_DATE_TZO_WINDOWS) DUK_INTERNAL duk_int_t duk_bi_date_get_local_tzoffset_windows(duk_double_t d) { SYSTEMTIME st1; SYSTEMTIME st2; SYSTEMTIME st3; ULARGE_INTEGER tmp1; ULARGE_INTEGER tmp2; ULARGE_INTEGER tmp3; FILETIME ft1; /* XXX: handling of timestamps outside Windows supported range. * How does Windows deal with dates before 1600? Does windows * support all ECMAScript years (like -200000 and +200000)? * Should equivalent year mapping be used here too? If so, use * a shared helper (currently integrated into timeval-to-parts). */ /* Use the approach described in "Remarks" of FileTimeToLocalFileTime: * http://msdn.microsoft.com/en-us/library/windows/desktop/ms724277(v=vs.85).aspx */ duk__set_systime_jan1970(&st1); duk__convert_systime_to_ularge((const SYSTEMTIME *) &st1, &tmp1); tmp2.QuadPart = (ULONGLONG) (d * 10000.0); /* millisec -> 100ns units since jan 1, 1970 */ tmp2.QuadPart += tmp1.QuadPart; /* input 'd' in Windows UTC, 100ns units */ ft1.dwLowDateTime = tmp2.LowPart; ft1.dwHighDateTime = tmp2.HighPart; if (FileTimeToSystemTime((const FILETIME *) &ft1, &st2) == 0) { DUK_D(DUK_DPRINT("FileTimeToSystemTime() failed, return tzoffset 0")); return 0; } if (SystemTimeToTzSpecificLocalTime((LPTIME_ZONE_INFORMATION) NULL, &st2, &st3) == 0) { DUK_D(DUK_DPRINT("SystemTimeToTzSpecificLocalTime() failed, return tzoffset 0")); return 0; } duk__convert_systime_to_ularge((const SYSTEMTIME *) &st3, &tmp3); /* Positive if local time ahead of UTC. */ return (duk_int_t) (((LONGLONG) tmp3.QuadPart - (LONGLONG) tmp2.QuadPart) / DUK_I64_CONSTANT(10000000)); /* seconds */ } #endif /* DUK_USE_DATE_TZO_WINDOWS */ #if defined(DUK_USE_DATE_TZO_WINDOWS_NO_DST) DUK_INTERNAL duk_int_t duk_bi_date_get_local_tzoffset_windows_no_dst(duk_double_t d) { SYSTEMTIME st1; SYSTEMTIME st2; FILETIME ft1; FILETIME ft2; ULARGE_INTEGER tmp1; ULARGE_INTEGER tmp2; /* Do a similar computation to duk_bi_date_get_local_tzoffset_windows * but without accounting for daylight savings time. Use this on * Windows platforms (like Durango) that don't support the * SystemTimeToTzSpecificLocalTime() call. */ /* current time not needed for this computation */ DUK_UNREF(d); duk__set_systime_jan1970(&st1); duk__convert_systime_to_ularge((const SYSTEMTIME *) &st1, &tmp1); ft1.dwLowDateTime = tmp1.LowPart; ft1.dwHighDateTime = tmp1.HighPart; if (FileTimeToLocalFileTime((const FILETIME *) &ft1, &ft2) == 0) { DUK_D(DUK_DPRINT("FileTimeToLocalFileTime() failed, return tzoffset 0")); return 0; } if (FileTimeToSystemTime((const FILETIME *) &ft2, &st2) == 0) { DUK_D(DUK_DPRINT("FileTimeToSystemTime() failed, return tzoffset 0")); return 0; } duk__convert_systime_to_ularge((const SYSTEMTIME *) &st2, &tmp2); return (duk_int_t) (((LONGLONG) tmp2.QuadPart - (LONGLONG) tmp1.QuadPart) / DUK_I64_CONSTANT(10000000)); /* seconds */ } #endif /* DUK_USE_DATE_TZO_WINDOWS_NO_DST */ #if defined(DUK_USE_GET_MONOTONIC_TIME_WINDOWS_QPC) DUK_INTERNAL duk_double_t duk_bi_date_get_monotonic_time_windows_qpc(void) { LARGE_INTEGER count, freq; /* There are legacy issues with QueryPerformanceCounter(): * - Potential jumps: https://support.microsoft.com/en-us/help/274323/performance-counter-value-may-unexpectedly-leap-forward * - Differences between cores (XP): https://msdn.microsoft.com/en-us/library/windows/desktop/dn553408(v=vs.85).aspx#qpc_support_in_windows_versions * * We avoid these by enabling QPC by default only for Vista or later. */ if (QueryPerformanceCounter(&count) && QueryPerformanceFrequency(&freq)) { /* XXX: QueryPerformanceFrequency() can be cached */ return (duk_double_t) count.QuadPart / (duk_double_t) freq.QuadPart * 1000.0; } else { /* MSDN: "On systems that run Windows XP or later, the function * will always succeed and will thus never return zero." * Provide minimal error path just in case user enables this * feature in pre-XP Windows. */ return 0.0; } } #endif /* DUK_USE_GET_MONOTONIC_TIME_WINDOWS_QPC */ /* * Duktape built-ins * * Size optimization note: it might seem that vararg multipurpose functions * like fin(), enc(), and dec() are not very size optimal, but using a single * user-visible ECMAScript function saves a lot of run-time footprint; each * Function instance takes >100 bytes. Using a shared native helper and a * 'magic' value won't save much if there are multiple Function instances * anyway. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_DUKTAPE_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_duktape_object_info(duk_hthread *thr) { duk_inspect_value(thr, -1); return 1; } DUK_INTERNAL duk_ret_t duk_bi_duktape_object_act(duk_hthread *thr) { duk_int_t level; level = duk_to_int(thr, 0); duk_inspect_callstack_entry(thr, level); return 1; } DUK_INTERNAL duk_ret_t duk_bi_duktape_object_gc(duk_hthread *thr) { duk_small_uint_t flags; flags = (duk_small_uint_t) duk_get_uint(thr, 0); duk_heap_mark_and_sweep(thr->heap, flags); /* XXX: Not sure what the best return value would be in the API. * Return true for now. */ duk_push_true(thr); return 1; } #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_duktape_object_fin(duk_hthread *thr) { (void) duk_require_hobject(thr, 0); if (duk_get_top(thr) >= 2) { /* Set: currently a finalizer is disabled by setting it to * undefined; this does not remove the property at the moment. * The value could be type checked to be either a function * or something else; if something else, the property could * be deleted. Must use duk_set_finalizer() to keep * DUK_HOBJECT_FLAG_HAVE_FINALIZER in sync. */ duk_set_top(thr, 2); duk_set_finalizer(thr, 0); return 0; } else { /* Get. */ DUK_ASSERT(duk_get_top(thr) == 1); duk_get_finalizer(thr, 0); return 1; } } #endif /* DUK_USE_FINALIZER_SUPPORT */ DUK_INTERNAL duk_ret_t duk_bi_duktape_object_enc(duk_hthread *thr) { duk_hstring *h_str; /* Vararg function: must be careful to check/require arguments. * The JSON helpers accept invalid indices and treat them like * non-existent optional parameters. */ h_str = duk_require_hstring(thr, 0); /* Could reject symbols, but no point: won't match comparisons. */ duk_require_valid_index(thr, 1); if (h_str == DUK_HTHREAD_STRING_HEX(thr)) { duk_set_top(thr, 2); duk_hex_encode(thr, 1); DUK_ASSERT_TOP(thr, 2); } else if (h_str == DUK_HTHREAD_STRING_BASE64(thr)) { duk_set_top(thr, 2); duk_base64_encode(thr, 1); DUK_ASSERT_TOP(thr, 2); #if defined(DUK_USE_JSON_SUPPORT) && defined(DUK_USE_JX) } else if (h_str == DUK_HTHREAD_STRING_JX(thr)) { duk_bi_json_stringify_helper(thr, 1 /*idx_value*/, 2 /*idx_replacer*/, 3 /*idx_space*/, DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_ASCII_ONLY | DUK_JSON_FLAG_AVOID_KEY_QUOTES /*flags*/); #endif #if defined(DUK_USE_JSON_SUPPORT) && defined(DUK_USE_JC) } else if (h_str == DUK_HTHREAD_STRING_JC(thr)) { duk_bi_json_stringify_helper(thr, 1 /*idx_value*/, 2 /*idx_replacer*/, 3 /*idx_space*/, DUK_JSON_FLAG_EXT_COMPATIBLE | DUK_JSON_FLAG_ASCII_ONLY /*flags*/); #endif } else { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } return 1; } DUK_INTERNAL duk_ret_t duk_bi_duktape_object_dec(duk_hthread *thr) { duk_hstring *h_str; /* Vararg function: must be careful to check/require arguments. * The JSON helpers accept invalid indices and treat them like * non-existent optional parameters. */ h_str = duk_require_hstring(thr, 0); /* Could reject symbols, but no point: won't match comparisons */ duk_require_valid_index(thr, 1); if (h_str == DUK_HTHREAD_STRING_HEX(thr)) { duk_set_top(thr, 2); duk_hex_decode(thr, 1); DUK_ASSERT_TOP(thr, 2); } else if (h_str == DUK_HTHREAD_STRING_BASE64(thr)) { duk_set_top(thr, 2); duk_base64_decode(thr, 1); DUK_ASSERT_TOP(thr, 2); #if defined(DUK_USE_JSON_SUPPORT) && defined(DUK_USE_JX) } else if (h_str == DUK_HTHREAD_STRING_JX(thr)) { duk_bi_json_parse_helper(thr, 1 /*idx_value*/, 2 /*idx_replacer*/, DUK_JSON_FLAG_EXT_CUSTOM /*flags*/); #endif #if defined(DUK_USE_JSON_SUPPORT) && defined(DUK_USE_JC) } else if (h_str == DUK_HTHREAD_STRING_JC(thr)) { duk_bi_json_parse_helper(thr, 1 /*idx_value*/, 2 /*idx_replacer*/, DUK_JSON_FLAG_EXT_COMPATIBLE /*flags*/); #endif } else { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } return 1; } /* * Compact an object */ DUK_INTERNAL duk_ret_t duk_bi_duktape_object_compact(duk_hthread *thr) { DUK_ASSERT_TOP(thr, 1); duk_compact(thr, 0); return 1; /* return the argument object */ } #endif /* DUK_USE_DUKTAPE_BUILTIN */ /* * WHATWG Encoding API built-ins * * API specification: https://encoding.spec.whatwg.org/#api * Web IDL: https://www.w3.org/TR/WebIDL/ */ /* #include duk_internal.h -> already included */ /* * Data structures for encoding/decoding */ typedef struct { duk_uint8_t *out; /* where to write next byte(s) */ duk_codepoint_t lead; /* lead surrogate */ } duk__encode_context; typedef struct { /* UTF-8 decoding state */ duk_codepoint_t codepoint; /* built up incrementally */ duk_uint8_t upper; /* max value of next byte (decode error otherwise) */ duk_uint8_t lower; /* min value of next byte (ditto) */ duk_uint8_t needed; /* how many more bytes we need */ duk_uint8_t bom_handled; /* BOM seen or no longer expected */ /* Decoder configuration */ duk_uint8_t fatal; duk_uint8_t ignore_bom; } duk__decode_context; /* The signed duk_codepoint_t type is used to signal a decoded codepoint * (>= 0) or various other states using negative values. */ #define DUK__CP_CONTINUE (-1) /* continue to next byte, no completed codepoint */ #define DUK__CP_ERROR (-2) /* decoding error */ #define DUK__CP_RETRY (-3) /* decoding error; retry last byte */ /* * Raw helpers for encoding/decoding */ /* Emit UTF-8 (= CESU-8) encoded U+FFFD (replacement char), i.e. ef bf bd. */ DUK_LOCAL duk_uint8_t *duk__utf8_emit_repl(duk_uint8_t *ptr) { *ptr++ = 0xef; *ptr++ = 0xbf; *ptr++ = 0xbd; return ptr; } DUK_LOCAL void duk__utf8_decode_init(duk__decode_context *dec_ctx) { /* (Re)init the decoding state of 'dec_ctx' but leave decoder * configuration fields untouched. */ dec_ctx->codepoint = 0x0000L; dec_ctx->upper = 0xbf; dec_ctx->lower = 0x80; dec_ctx->needed = 0; dec_ctx->bom_handled = 0; } DUK_LOCAL duk_codepoint_t duk__utf8_decode_next(duk__decode_context *dec_ctx, duk_uint8_t x) { /* * UTF-8 algorithm based on the Encoding specification: * https://encoding.spec.whatwg.org/#utf-8-decoder * * Two main states: decoding initial byte vs. decoding continuation * bytes. Shortest length encoding is validated by restricting the * allowed range of first continuation byte using 'lower' and 'upper'. */ if (dec_ctx->needed == 0) { /* process initial byte */ if (x <= 0x7f) { /* U+0000-U+007F, 1 byte (ASCII) */ return (duk_codepoint_t) x; } else if (x >= 0xc2 && x <= 0xdf) { /* U+0080-U+07FF, 2 bytes */ dec_ctx->needed = 1; dec_ctx->codepoint = x & 0x1f; DUK_ASSERT(dec_ctx->lower == 0x80); DUK_ASSERT(dec_ctx->upper == 0xbf); return DUK__CP_CONTINUE; } else if (x >= 0xe0 && x <= 0xef) { /* U+0800-U+FFFF, 3 bytes */ if (x == 0xe0) { dec_ctx->lower = 0xa0; DUK_ASSERT(dec_ctx->upper == 0xbf); } else if (x == 0xed) { DUK_ASSERT(dec_ctx->lower == 0x80); dec_ctx->upper = 0x9f; } dec_ctx->needed = 2; dec_ctx->codepoint = x & 0x0f; return DUK__CP_CONTINUE; } else if (x >= 0xf0 && x <= 0xf4) { /* U+010000-U+10FFFF, 4 bytes */ if (x == 0xf0) { dec_ctx->lower = 0x90; DUK_ASSERT(dec_ctx->upper == 0xbf); } else if (x == 0xf4) { DUK_ASSERT(dec_ctx->lower == 0x80); dec_ctx->upper = 0x8f; } dec_ctx->needed = 3; dec_ctx->codepoint = x & 0x07; return DUK__CP_CONTINUE; } else { /* not a legal initial byte */ return DUK__CP_ERROR; } } else { /* process continuation byte */ if (x >= dec_ctx->lower && x <= dec_ctx->upper) { dec_ctx->lower = 0x80; dec_ctx->upper = 0xbf; dec_ctx->codepoint = (dec_ctx->codepoint << 6) | (x & 0x3f); if (--dec_ctx->needed > 0) { /* need more bytes */ return DUK__CP_CONTINUE; } else { /* got a codepoint */ duk_codepoint_t ret; DUK_ASSERT(dec_ctx->codepoint <= 0x10ffffL); /* Decoding rules guarantee. */ ret = dec_ctx->codepoint; dec_ctx->codepoint = 0x0000L; dec_ctx->needed = 0; return ret; } } else { /* We just encountered an illegal UTF-8 continuation byte. This might * be the initial byte of the next character; if we return a plain * error status and the decoder is in replacement mode, the character * will be masked. We still need to alert the caller to the error * though. */ dec_ctx->codepoint = 0x0000L; dec_ctx->needed = 0; dec_ctx->lower = 0x80; dec_ctx->upper = 0xbf; return DUK__CP_RETRY; } } } #if defined(DUK_USE_ENCODING_BUILTINS) DUK_LOCAL void duk__utf8_encode_char(void *udata, duk_codepoint_t codepoint) { duk__encode_context *enc_ctx; DUK_ASSERT(codepoint >= 0); enc_ctx = (duk__encode_context *) udata; DUK_ASSERT(enc_ctx != NULL); #if !defined(DUK_USE_PREFER_SIZE) if (codepoint <= 0x7f && enc_ctx->lead == 0x0000L) { /* Fast path for ASCII. */ *enc_ctx->out++ = (duk_uint8_t) codepoint; return; } #endif if (DUK_UNLIKELY(codepoint > 0x10ffffL)) { /* cannot legally encode in UTF-8 */ codepoint = DUK_UNICODE_CP_REPLACEMENT_CHARACTER; } else if (codepoint >= 0xd800L && codepoint <= 0xdfffL) { if (codepoint <= 0xdbffL) { /* high surrogate */ duk_codepoint_t prev_lead = enc_ctx->lead; enc_ctx->lead = codepoint; if (prev_lead == 0x0000L) { /* high surrogate, no output */ return; } else { /* consecutive high surrogates, consider first one unpaired */ codepoint = DUK_UNICODE_CP_REPLACEMENT_CHARACTER; } } else { /* low surrogate */ if (enc_ctx->lead != 0x0000L) { codepoint = (duk_codepoint_t) (0x010000L + ((enc_ctx->lead - 0xd800L) << 10) + (codepoint - 0xdc00L)); enc_ctx->lead = 0x0000L; } else { /* unpaired low surrogate */ DUK_ASSERT(enc_ctx->lead == 0x0000L); codepoint = DUK_UNICODE_CP_REPLACEMENT_CHARACTER; } } } else { if (enc_ctx->lead != 0x0000L) { /* unpaired high surrogate: emit replacement character and the input codepoint */ enc_ctx->lead = 0x0000L; enc_ctx->out = duk__utf8_emit_repl(enc_ctx->out); } } /* Codepoint may be original input, a decoded surrogate pair, or may * have been replaced with U+FFFD. */ enc_ctx->out += duk_unicode_encode_xutf8((duk_ucodepoint_t) codepoint, enc_ctx->out); } #endif /* DUK_USE_ENCODING_BUILTINS */ /* Shared helper for buffer-to-string using a TextDecoder() compatible UTF-8 * decoder. */ DUK_LOCAL duk_ret_t duk__decode_helper(duk_hthread *thr, duk__decode_context *dec_ctx) { const duk_uint8_t *input; duk_size_t len = 0; duk_size_t len_tmp; duk_bool_t stream = 0; duk_codepoint_t codepoint; duk_uint8_t *output; const duk_uint8_t *in; duk_uint8_t *out; DUK_ASSERT(dec_ctx != NULL); /* Careful with input buffer pointer: any side effects involving * code execution (e.g. getters, coercion calls, and finalizers) * may cause a resize and invalidate a pointer we've read. This * is why the pointer is actually looked up at the last minute. * Argument validation must still happen first to match WHATWG * required side effect order. */ if (duk_is_undefined(thr, 0)) { duk_push_fixed_buffer_nozero(thr, 0); duk_replace(thr, 0); } (void) duk_require_buffer_data(thr, 0, &len); /* Need 'len', avoid pointer. */ if (duk_check_type_mask(thr, 1, DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_NONE)) { /* Use defaults, treat missing value like undefined. */ } else { duk_require_type_mask(thr, 1, DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER | DUK_TYPE_MASK_OBJECT); if (duk_get_prop_literal(thr, 1, "stream")) { stream = duk_to_boolean(thr, -1); } } /* Allowance is 3*len in the general case because all bytes may potentially * become U+FFFD. If the first byte completes a non-BMP codepoint it will * decode to a CESU-8 surrogate pair (6 bytes) so we allow 3 extra bytes to * compensate: (1*3)+3 = 6. Non-BMP codepoints are safe otherwise because * the 4->6 expansion is well under the 3x allowance. * * XXX: As with TextEncoder, need a better buffer allocation strategy here. */ if (len >= (DUK_HBUFFER_MAX_BYTELEN / 3) - 3) { DUK_ERROR_TYPE(thr, DUK_STR_RESULT_TOO_LONG); DUK_WO_NORETURN(return 0;); } output = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, 3 + (3 * len)); /* used parts will be always manually written over */ input = (const duk_uint8_t *) duk_get_buffer_data(thr, 0, &len_tmp); DUK_ASSERT(input != NULL || len == 0); if (DUK_UNLIKELY(len != len_tmp)) { /* Very unlikely but possible: source buffer was resized by * a side effect when fixed buffer was pushed. Output buffer * may not be large enough to hold output, so just fail if * length has changed. */ DUK_D(DUK_DPRINT("input buffer resized by side effect, fail")); goto fail_type; } /* From this point onwards it's critical that no side effect occur * which may disturb 'input': finalizer execution, property accesses, * active coercions, etc. Even an allocation related mark-and-sweep * may affect the pointer because it may trigger a pending finalizer. */ in = input; out = output; while (in < input + len) { codepoint = duk__utf8_decode_next(dec_ctx, *in++); if (codepoint < 0) { if (codepoint == DUK__CP_CONTINUE) { continue; } /* Decoding error with or without retry. */ DUK_ASSERT(codepoint == DUK__CP_ERROR || codepoint == DUK__CP_RETRY); if (codepoint == DUK__CP_RETRY) { --in; /* retry last byte */ } /* replacement mode: replace with U+FFFD */ codepoint = DUK_UNICODE_CP_REPLACEMENT_CHARACTER; if (dec_ctx->fatal) { /* fatal mode: throw a TypeError */ goto fail_type; } /* Continue with 'codepoint', Unicode replacement. */ } DUK_ASSERT(codepoint >= 0x0000L && codepoint <= 0x10ffffL); if (!dec_ctx->bom_handled) { dec_ctx->bom_handled = 1; if (codepoint == 0xfeffL && !dec_ctx->ignore_bom) { continue; } } out += duk_unicode_encode_cesu8((duk_ucodepoint_t) codepoint, out); DUK_ASSERT(out <= output + (3 + (3 * len))); } if (!stream) { if (dec_ctx->needed != 0) { /* truncated sequence at end of buffer */ if (dec_ctx->fatal) { goto fail_type; } else { out += duk_unicode_encode_cesu8(DUK_UNICODE_CP_REPLACEMENT_CHARACTER, out); DUK_ASSERT(out <= output + (3 + (3 * len))); } } duk__utf8_decode_init(dec_ctx); /* Initialize decoding state for potential reuse. */ } /* Output buffer is fixed and thus stable even if there had been * side effects (which there shouldn't be). */ duk_push_lstring(thr, (const char *) output, (duk_size_t) (out - output)); return 1; fail_type: DUK_ERROR_TYPE(thr, DUK_STR_UTF8_DECODE_FAILED); DUK_WO_NORETURN(return 0;); } /* * Built-in bindings */ #if defined(DUK_USE_ENCODING_BUILTINS) DUK_INTERNAL duk_ret_t duk_bi_textencoder_constructor(duk_hthread *thr) { /* TextEncoder currently requires no persistent state, so the constructor * does nothing on purpose. */ duk_require_constructor_call(thr); return 0; } DUK_INTERNAL duk_ret_t duk_bi_textencoder_prototype_encoding_getter(duk_hthread *thr) { duk_push_literal(thr, "utf-8"); return 1; } DUK_INTERNAL duk_ret_t duk_bi_textencoder_prototype_encode(duk_hthread *thr) { duk__encode_context enc_ctx; duk_size_t len; duk_size_t final_len; duk_uint8_t *output; DUK_ASSERT_TOP(thr, 1); if (duk_is_undefined(thr, 0)) { len = 0; } else { duk_hstring *h_input; h_input = duk_to_hstring(thr, 0); DUK_ASSERT(h_input != NULL); len = (duk_size_t) DUK_HSTRING_GET_CHARLEN(h_input); if (len >= DUK_HBUFFER_MAX_BYTELEN / 3) { DUK_ERROR_TYPE(thr, DUK_STR_RESULT_TOO_LONG); DUK_WO_NORETURN(return 0;); } } /* Allowance is 3*len because all bytes can potentially be replaced with * U+FFFD -- which rather inconveniently encodes to 3 bytes in UTF-8. * Rely on dynamic buffer data pointer stability: no other code has * access to the data pointer. * * XXX: The buffer allocation strategy used here is rather inefficient. * Maybe switch to a chunk-based strategy, or preprocess the string to * figure out the space needed ahead of time? */ DUK_ASSERT(3 * len >= len); output = (duk_uint8_t *) duk_push_dynamic_buffer(thr, 3 * len); if (len > 0) { DUK_ASSERT(duk_is_string(thr, 0)); /* True if len > 0. */ /* XXX: duk_decode_string() is used to process the input * string. For standard ECMAScript strings, represented * internally as CESU-8, this is fine. However, behavior * beyond CESU-8 is not very strict: codepoints using an * extended form of UTF-8 are also accepted, and invalid * codepoint sequences (which are allowed in Duktape strings) * are not handled as well as they could (e.g. invalid * continuation bytes may mask following codepoints). * This is how ECMAScript code would also see such strings. * Maybe replace duk_decode_string() with an explicit strict * CESU-8 decoder here? */ enc_ctx.lead = 0x0000L; enc_ctx.out = output; duk_decode_string(thr, 0, duk__utf8_encode_char, (void *) &enc_ctx); if (enc_ctx.lead != 0x0000L) { /* unpaired high surrogate at end of string */ enc_ctx.out = duk__utf8_emit_repl(enc_ctx.out); DUK_ASSERT(enc_ctx.out <= output + (3 * len)); } /* The output buffer is usually very much oversized, so shrink it to * actually needed size. Pointer stability assumed up to this point. */ DUK_ASSERT_TOP(thr, 2); DUK_ASSERT(output == (duk_uint8_t *) duk_get_buffer_data(thr, -1, NULL)); final_len = (duk_size_t) (enc_ctx.out - output); duk_resize_buffer(thr, -1, final_len); /* 'output' and 'enc_ctx.out' are potentially invalidated by the resize. */ } else { final_len = 0; } /* Standard WHATWG output is a Uint8Array. Here the Uint8Array will * be backed by a dynamic buffer which differs from e.g. Uint8Arrays * created as 'new Uint8Array(N)'. ECMAScript code won't see the * difference but C code will. When bufferobjects are not supported, * returns a plain dynamic buffer. */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) duk_push_buffer_object(thr, -1, 0, final_len, DUK_BUFOBJ_UINT8ARRAY); #endif return 1; } DUK_INTERNAL duk_ret_t duk_bi_textdecoder_constructor(duk_hthread *thr) { duk__decode_context *dec_ctx; duk_bool_t fatal = 0; duk_bool_t ignore_bom = 0; DUK_ASSERT_TOP(thr, 2); duk_require_constructor_call(thr); if (!duk_is_undefined(thr, 0)) { /* XXX: For now ignore 'label' (encoding identifier). */ duk_to_string(thr, 0); } if (!duk_is_null_or_undefined(thr, 1)) { if (duk_get_prop_literal(thr, 1, "fatal")) { fatal = duk_to_boolean(thr, -1); } if (duk_get_prop_literal(thr, 1, "ignoreBOM")) { ignore_bom = duk_to_boolean(thr, -1); } } duk_push_this(thr); /* The decode context is not assumed to be zeroed; all fields are * initialized explicitly. */ dec_ctx = (duk__decode_context *) duk_push_fixed_buffer(thr, sizeof(duk__decode_context)); dec_ctx->fatal = (duk_uint8_t) fatal; dec_ctx->ignore_bom = (duk_uint8_t) ignore_bom; duk__utf8_decode_init(dec_ctx); /* Initializes remaining fields. */ duk_put_prop_literal(thr, -2, DUK_INTERNAL_SYMBOL("Context")); return 0; } /* Get TextDecoder context from 'this'; leaves garbage on stack. */ DUK_LOCAL duk__decode_context *duk__get_textdecoder_context(duk_hthread *thr) { duk__decode_context *dec_ctx; duk_push_this(thr); duk_get_prop_literal(thr, -1, DUK_INTERNAL_SYMBOL("Context")); dec_ctx = (duk__decode_context *) duk_require_buffer(thr, -1, NULL); DUK_ASSERT(dec_ctx != NULL); return dec_ctx; } DUK_INTERNAL duk_ret_t duk_bi_textdecoder_prototype_shared_getter(duk_hthread *thr) { duk__decode_context *dec_ctx; duk_int_t magic; dec_ctx = duk__get_textdecoder_context(thr); magic = duk_get_current_magic(thr); switch (magic) { case 0: /* Encoding is now fixed, so _Context lookup is only needed to * validate the 'this' binding (TypeError if not TextDecoder-like). */ duk_push_literal(thr, "utf-8"); break; case 1: duk_push_boolean(thr, dec_ctx->fatal); break; default: duk_push_boolean(thr, dec_ctx->ignore_bom); break; } return 1; } DUK_INTERNAL duk_ret_t duk_bi_textdecoder_prototype_decode(duk_hthread *thr) { duk__decode_context *dec_ctx; dec_ctx = duk__get_textdecoder_context(thr); return duk__decode_helper(thr, dec_ctx); } #endif /* DUK_USE_ENCODING_BUILTINS */ /* * Internal helper for Node.js Buffer */ /* Internal helper used for Node.js Buffer .toString(). Value stack convention * is currently odd: it mimics TextDecoder .decode() so that argument must be at * index 0, and decode options (not present for Buffer) at index 1. Return value * is a Duktape/C function return value. */ DUK_INTERNAL duk_ret_t duk_textdecoder_decode_utf8_nodejs(duk_hthread *thr) { duk__decode_context dec_ctx; dec_ctx.fatal = 0; /* use replacement chars */ dec_ctx.ignore_bom = 1; /* ignore BOMs (matches Node.js Buffer .toString()) */ duk__utf8_decode_init(&dec_ctx); return duk__decode_helper(thr, &dec_ctx); } /* automatic undefs */ #undef DUK__CP_CONTINUE #undef DUK__CP_ERROR #undef DUK__CP_RETRY /* * Error built-ins */ /* #include duk_internal.h -> already included */ DUK_INTERNAL duk_ret_t duk_bi_error_constructor_shared(duk_hthread *thr) { /* Behavior for constructor and non-constructor call is * the same except for augmenting the created error. When * called as a constructor, the caller (duk_new()) will handle * augmentation; when called as normal function, we need to do * it here. */ duk_small_int_t bidx_prototype = duk_get_current_magic(thr); /* same for both error and each subclass like TypeError */ duk_uint_t flags_and_class = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ERROR); (void) duk_push_object_helper(thr, flags_and_class, bidx_prototype); /* If message is undefined, the own property 'message' is not set at * all to save property space. An empty message is inherited anyway. */ if (!duk_is_undefined(thr, 0)) { duk_to_string(thr, 0); duk_dup_0(thr); /* [ message error message ] */ duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_MESSAGE, DUK_PROPDESC_FLAGS_WC); } /* Augment the error if called as a normal function. __FILE__ and __LINE__ * are not desirable in this case. */ #if defined(DUK_USE_AUGMENT_ERROR_CREATE) if (!duk_is_constructor_call(thr)) { duk_err_augment_error_create(thr, thr, NULL, 0, DUK_AUGMENT_FLAG_NOBLAME_FILELINE); } #endif return 1; } DUK_INTERNAL duk_ret_t duk_bi_error_prototype_to_string(duk_hthread *thr) { /* XXX: optimize with more direct internal access */ duk_push_this(thr); (void) duk_require_hobject_promote_mask(thr, -1, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); /* [ ... this ] */ duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_NAME); if (duk_is_undefined(thr, -1)) { duk_pop(thr); duk_push_literal(thr, "Error"); } else { duk_to_string(thr, -1); } /* [ ... this name ] */ /* XXX: Are steps 6 and 7 in E5 Section 15.11.4.4 duplicated by * accident or are they actually needed? The first ToString() * could conceivably return 'undefined'. */ duk_get_prop_stridx_short(thr, -2, DUK_STRIDX_MESSAGE); if (duk_is_undefined(thr, -1)) { duk_pop(thr); duk_push_hstring_empty(thr); } else { duk_to_string(thr, -1); } /* [ ... this name message ] */ if (duk_get_length(thr, -2) == 0) { /* name is empty -> return message */ return 1; } if (duk_get_length(thr, -1) == 0) { /* message is empty -> return name */ duk_pop(thr); return 1; } duk_push_literal(thr, ": "); duk_insert(thr, -2); /* ... name ': ' message */ duk_concat(thr, 3); return 1; } #if defined(DUK_USE_TRACEBACKS) /* * Traceback handling * * The unified helper decodes the traceback and produces various requested * outputs. It should be optimized for size, and may leave garbage on stack, * only the topmost return value matters. For instance, traceback separator * and decoded strings are pushed even when looking for filename only. * * NOTE: although _Tracedata is an internal property, user code can currently * write to the array (or replace it with something other than an array). * The code below must tolerate arbitrary _Tracedata. It can throw errors * etc, but cannot cause a segfault or memory unsafe behavior. */ /* constants arbitrary, chosen for small loads */ #define DUK__OUTPUT_TYPE_TRACEBACK (-1) #define DUK__OUTPUT_TYPE_FILENAME 0 #define DUK__OUTPUT_TYPE_LINENUMBER 1 DUK_LOCAL duk_ret_t duk__error_getter_helper(duk_hthread *thr, duk_small_int_t output_type) { duk_idx_t idx_td; duk_small_int_t i; /* traceback depth fits into 16 bits */ duk_small_int_t t; /* stack type fits into 16 bits */ duk_small_int_t count_func = 0; /* traceback depth ensures fits into 16 bits */ const char *str_tailcall = " tailcall"; const char *str_strict = " strict"; const char *str_construct = " construct"; const char *str_prevyield = " preventsyield"; const char *str_directeval = " directeval"; const char *str_empty = ""; DUK_ASSERT_TOP(thr, 0); /* fixed arg count */ duk_push_this(thr); duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_TRACEDATA); idx_td = duk_get_top_index(thr); duk_push_hstring_stridx(thr, DUK_STRIDX_NEWLINE_4SPACE); duk_push_this(thr); /* [ ... this tracedata sep this ] */ /* XXX: skip null filename? */ if (duk_check_type(thr, idx_td, DUK_TYPE_OBJECT)) { /* Current tracedata contains 2 entries per callstack entry. */ for (i = 0; ; i += 2) { duk_int_t pc; duk_uint_t line; duk_uint_t flags; duk_double_t d; const char *funcname; const char *filename; duk_hobject *h_func; duk_hstring *h_name; duk_require_stack(thr, 5); duk_get_prop_index(thr, idx_td, (duk_uarridx_t) i); duk_get_prop_index(thr, idx_td, (duk_uarridx_t) (i + 1)); d = duk_to_number_m1(thr); pc = duk_double_to_int_t(DUK_FMOD(d, DUK_DOUBLE_2TO32)); flags = duk_double_to_uint_t(DUK_FLOOR(d / DUK_DOUBLE_2TO32)); t = (duk_small_int_t) duk_get_type(thr, -2); if (t == DUK_TYPE_OBJECT || t == DUK_TYPE_LIGHTFUNC) { /* * ECMAScript/native function call or lightfunc call */ count_func++; /* [ ... v1(func) v2(pc+flags) ] */ /* These may be systematically omitted by Duktape * with certain config options, but allow user to * set them on a case-by-case basis. */ duk_get_prop_stridx_short(thr, -2, DUK_STRIDX_NAME); duk_get_prop_stridx_short(thr, -3, DUK_STRIDX_FILE_NAME); #if defined(DUK_USE_PC2LINE) line = (duk_uint_t) duk_hobject_pc2line_query(thr, -4, (duk_uint_fast32_t) pc); #else line = 0; #endif /* [ ... v1 v2 name filename ] */ /* When looking for .fileName/.lineNumber, blame first * function which has a .fileName. */ if (duk_is_string_notsymbol(thr, -1)) { if (output_type == DUK__OUTPUT_TYPE_FILENAME) { return 1; } else if (output_type == DUK__OUTPUT_TYPE_LINENUMBER) { duk_push_uint(thr, line); return 1; } } /* XXX: Change 'anon' handling here too, to use empty string for anonymous functions? */ /* XXX: Could be improved by coercing to a readable duk_tval (especially string escaping) */ h_name = duk_get_hstring_notsymbol(thr, -2); /* may be NULL */ funcname = (h_name == NULL || h_name == DUK_HTHREAD_STRING_EMPTY_STRING(thr)) ? "[anon]" : (const char *) DUK_HSTRING_GET_DATA(h_name); filename = duk_get_string_notsymbol(thr, -1); filename = filename ? filename : ""; DUK_ASSERT(funcname != NULL); DUK_ASSERT(filename != NULL); h_func = duk_get_hobject(thr, -4); /* NULL for lightfunc */ if (h_func == NULL) { duk_push_sprintf(thr, "at %s light%s%s%s%s%s", (const char *) funcname, (const char *) ((flags & DUK_ACT_FLAG_STRICT) ? str_strict : str_empty), (const char *) ((flags & DUK_ACT_FLAG_TAILCALLED) ? str_tailcall : str_empty), (const char *) ((flags & DUK_ACT_FLAG_CONSTRUCT) ? str_construct : str_empty), (const char *) ((flags & DUK_ACT_FLAG_DIRECT_EVAL) ? str_directeval : str_empty), (const char *) ((flags & DUK_ACT_FLAG_PREVENT_YIELD) ? str_prevyield : str_empty)); } else if (DUK_HOBJECT_HAS_NATFUNC(h_func)) { duk_push_sprintf(thr, "at %s (%s) native%s%s%s%s%s", (const char *) funcname, (const char *) filename, (const char *) ((flags & DUK_ACT_FLAG_STRICT) ? str_strict : str_empty), (const char *) ((flags & DUK_ACT_FLAG_TAILCALLED) ? str_tailcall : str_empty), (const char *) ((flags & DUK_ACT_FLAG_CONSTRUCT) ? str_construct : str_empty), (const char *) ((flags & DUK_ACT_FLAG_DIRECT_EVAL) ? str_directeval : str_empty), (const char *) ((flags & DUK_ACT_FLAG_PREVENT_YIELD) ? str_prevyield : str_empty)); } else { duk_push_sprintf(thr, "at %s (%s:%lu)%s%s%s%s%s", (const char *) funcname, (const char *) filename, (unsigned long) line, (const char *) ((flags & DUK_ACT_FLAG_STRICT) ? str_strict : str_empty), (const char *) ((flags & DUK_ACT_FLAG_TAILCALLED) ? str_tailcall : str_empty), (const char *) ((flags & DUK_ACT_FLAG_CONSTRUCT) ? str_construct : str_empty), (const char *) ((flags & DUK_ACT_FLAG_DIRECT_EVAL) ? str_directeval : str_empty), (const char *) ((flags & DUK_ACT_FLAG_PREVENT_YIELD) ? str_prevyield : str_empty)); } duk_replace(thr, -5); /* [ ... v1 v2 name filename str ] -> [ ... str v2 name filename ] */ duk_pop_3(thr); /* -> [ ... str ] */ } else if (t == DUK_TYPE_STRING) { const char *str_file; /* * __FILE__ / __LINE__ entry, here 'pc' is line number directly. * Sometimes __FILE__ / __LINE__ is reported as the source for * the error (fileName, lineNumber), sometimes not. */ /* [ ... v1(filename) v2(line+flags) ] */ /* When looking for .fileName/.lineNumber, blame compilation * or C call site unless flagged not to do so. */ if (!(flags & DUK_TB_FLAG_NOBLAME_FILELINE)) { if (output_type == DUK__OUTPUT_TYPE_FILENAME) { duk_pop(thr); return 1; } else if (output_type == DUK__OUTPUT_TYPE_LINENUMBER) { duk_push_int(thr, pc); return 1; } } /* Tracedata is trusted but avoid any risk of using a NULL * for %s format because it has undefined behavior. Symbols * don't need to be explicitly rejected as they pose no memory * safety issues. */ str_file = (const char *) duk_get_string(thr, -2); duk_push_sprintf(thr, "at [anon] (%s:%ld) internal", (const char *) (str_file ? str_file : "null"), (long) pc); duk_replace(thr, -3); /* [ ... v1 v2 str ] -> [ ... str v2 ] */ duk_pop(thr); /* -> [ ... str ] */ } else { /* unknown, ignore */ duk_pop_2(thr); break; } } if (count_func >= DUK_USE_TRACEBACK_DEPTH) { /* Possibly truncated; there is no explicit truncation * marker so this is the best we can do. */ duk_push_hstring_stridx(thr, DUK_STRIDX_BRACKETED_ELLIPSIS); } } /* [ ... this tracedata sep this str1 ... strN ] */ if (output_type != DUK__OUTPUT_TYPE_TRACEBACK) { return 0; } else { /* The 'this' after 'sep' will get ToString() coerced by * duk_join() automatically. We don't want to do that * coercion when providing .fileName or .lineNumber (GH-254). */ duk_join(thr, duk_get_top(thr) - (idx_td + 2) /*count, not including sep*/); return 1; } } /* XXX: Output type could be encoded into native function 'magic' value to * save space. For setters the stridx could be encoded into 'magic'. */ DUK_INTERNAL duk_ret_t duk_bi_error_prototype_stack_getter(duk_hthread *thr) { return duk__error_getter_helper(thr, DUK__OUTPUT_TYPE_TRACEBACK); } DUK_INTERNAL duk_ret_t duk_bi_error_prototype_filename_getter(duk_hthread *thr) { return duk__error_getter_helper(thr, DUK__OUTPUT_TYPE_FILENAME); } DUK_INTERNAL duk_ret_t duk_bi_error_prototype_linenumber_getter(duk_hthread *thr) { return duk__error_getter_helper(thr, DUK__OUTPUT_TYPE_LINENUMBER); } #else /* DUK_USE_TRACEBACKS */ /* * Traceback handling when tracebacks disabled. * * The fileName / lineNumber stubs are now necessary because built-in * data will include the accessor properties in Error.prototype. If those * are removed for builds without tracebacks, these can also be removed. * 'stack' should still be present and produce a ToString() equivalent: * this is useful for user code which prints a stacktrace and expects to * see something useful. A normal stacktrace also begins with a ToString() * of the error so this makes sense. */ DUK_INTERNAL duk_ret_t duk_bi_error_prototype_stack_getter(duk_hthread *thr) { /* XXX: remove this native function and map 'stack' accessor * to the toString() implementation directly. */ return duk_bi_error_prototype_to_string(thr); } DUK_INTERNAL duk_ret_t duk_bi_error_prototype_filename_getter(duk_hthread *thr) { DUK_UNREF(thr); return 0; } DUK_INTERNAL duk_ret_t duk_bi_error_prototype_linenumber_getter(duk_hthread *thr) { DUK_UNREF(thr); return 0; } #endif /* DUK_USE_TRACEBACKS */ DUK_LOCAL duk_ret_t duk__error_setter_helper(duk_hthread *thr, duk_small_uint_t stridx_key) { /* Attempt to write 'stack', 'fileName', 'lineNumber' works as if * user code called Object.defineProperty() to create an overriding * own property. This allows user code to overwrite .fileName etc * intuitively as e.g. "err.fileName = 'dummy'" as one might expect. * See https://github.com/svaarala/duktape/issues/387. */ DUK_ASSERT_TOP(thr, 1); /* fixed arg count: value */ duk_push_this(thr); duk_push_hstring_stridx(thr, stridx_key); duk_dup_0(thr); /* [ ... obj key value ] */ DUK_DD(DUK_DDPRINT("error setter: %!T %!T %!T", duk_get_tval(thr, -3), duk_get_tval(thr, -2), duk_get_tval(thr, -1))); duk_def_prop(thr, -3, DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_HAVE_WRITABLE | DUK_DEFPROP_WRITABLE | DUK_DEFPROP_HAVE_ENUMERABLE | /*not enumerable*/ DUK_DEFPROP_HAVE_CONFIGURABLE | DUK_DEFPROP_CONFIGURABLE); return 0; } DUK_INTERNAL duk_ret_t duk_bi_error_prototype_stack_setter(duk_hthread *thr) { return duk__error_setter_helper(thr, DUK_STRIDX_STACK); } DUK_INTERNAL duk_ret_t duk_bi_error_prototype_filename_setter(duk_hthread *thr) { return duk__error_setter_helper(thr, DUK_STRIDX_FILE_NAME); } DUK_INTERNAL duk_ret_t duk_bi_error_prototype_linenumber_setter(duk_hthread *thr) { return duk__error_setter_helper(thr, DUK_STRIDX_LINE_NUMBER); } /* automatic undefs */ #undef DUK__OUTPUT_TYPE_FILENAME #undef DUK__OUTPUT_TYPE_LINENUMBER #undef DUK__OUTPUT_TYPE_TRACEBACK /* * Function built-ins */ /* #include duk_internal.h -> already included */ /* Needed even when Function built-in is disabled. */ DUK_INTERNAL duk_ret_t duk_bi_function_prototype(duk_hthread *thr) { /* ignore arguments, return undefined (E5 Section 15.3.4) */ DUK_UNREF(thr); return 0; } #if defined(DUK_USE_FUNCTION_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_function_constructor(duk_hthread *thr) { duk_hstring *h_sourcecode; duk_idx_t nargs; duk_idx_t i; duk_small_uint_t comp_flags; duk_hcompfunc *func; duk_hobject *outer_lex_env; duk_hobject *outer_var_env; /* normal and constructor calls have identical semantics */ nargs = duk_get_top(thr); for (i = 0; i < nargs; i++) { duk_to_string(thr, i); /* Rejects Symbols during coercion. */ } if (nargs == 0) { duk_push_hstring_empty(thr); duk_push_hstring_empty(thr); } else if (nargs == 1) { /* XXX: cover this with the generic >1 case? */ duk_push_hstring_empty(thr); } else { duk_insert(thr, 0); /* [ arg1 ... argN-1 body] -> [body arg1 ... argN-1] */ duk_push_literal(thr, ","); duk_insert(thr, 1); duk_join(thr, nargs - 1); } /* [ body formals ], formals is comma separated list that needs to be parsed */ DUK_ASSERT_TOP(thr, 2); /* XXX: this placeholder is not always correct, but use for now. * It will fail in corner cases; see test-dev-func-cons-args.js. */ duk_push_literal(thr, "function("); duk_dup_1(thr); duk_push_literal(thr, "){"); duk_dup_0(thr); duk_push_literal(thr, "\n}"); /* Newline is important to handle trailing // comment. */ duk_concat(thr, 5); /* [ body formals source ] */ DUK_ASSERT_TOP(thr, 3); /* strictness is not inherited, intentional */ comp_flags = DUK_COMPILE_FUNCEXPR; duk_push_hstring_stridx(thr, DUK_STRIDX_COMPILE); /* XXX: copy from caller? */ /* XXX: ignored now */ h_sourcecode = duk_require_hstring(thr, -2); /* no symbol check needed; -2 is concat'd code */ duk_js_compile(thr, (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_sourcecode), (duk_size_t) DUK_HSTRING_GET_BYTELEN(h_sourcecode), comp_flags); /* Force .name to 'anonymous' (ES2015). */ duk_push_literal(thr, "anonymous"); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_C); func = (duk_hcompfunc *) duk_known_hobject(thr, -1); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC((duk_hobject *) func)); DUK_ASSERT(DUK_HOBJECT_HAS_CONSTRUCTABLE((duk_hobject *) func)); /* [ body formals source template ] */ /* only outer_lex_env matters, as functions always get a new * variable declaration environment. */ outer_lex_env = thr->builtins[DUK_BIDX_GLOBAL_ENV]; outer_var_env = thr->builtins[DUK_BIDX_GLOBAL_ENV]; duk_js_push_closure(thr, func, outer_var_env, outer_lex_env, 1 /*add_auto_proto*/); /* [ body formals source template closure ] */ return 1; } #endif /* DUK_USE_FUNCTION_BUILTIN */ #if defined(DUK_USE_FUNCTION_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_function_prototype_to_string(duk_hthread *thr) { duk_tval *tv; /* * E5 Section 15.3.4.2 places few requirements on the output of * this function: the result is implementation dependent, must * follow FunctionDeclaration syntax (in particular, must have a * name even for anonymous functions or functions with empty name). * The output does NOT need to compile into anything useful. * * E6 Section 19.2.3.5 changes the requirements completely: the * result must either eval() to a functionally equivalent object * OR eval() to a SyntaxError. * * We opt for the SyntaxError approach for now, with a syntax that * mimics V8's native function syntax: * * 'function cos() { [native code] }' * * but extended with [ecmascript code], [bound code], and * [lightfunc code]. */ duk_push_this(thr); tv = DUK_GET_TVAL_NEGIDX(thr, -1); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *obj = DUK_TVAL_GET_OBJECT(tv); const char *func_name; /* Function name: missing/undefined is mapped to empty string, * otherwise coerce to string. No handling for invalid identifier * characters or e.g. '{' in the function name. This doesn't * really matter as long as a SyntaxError results. Technically * if the name contained a suitable prefix followed by '//' it * might cause the result to parse without error. */ duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_NAME); if (duk_is_undefined(thr, -1)) { func_name = ""; } else { func_name = duk_to_string(thr, -1); DUK_ASSERT(func_name != NULL); } if (DUK_HOBJECT_IS_COMPFUNC(obj)) { duk_push_sprintf(thr, "function %s() { [ecmascript code] }", (const char *) func_name); } else if (DUK_HOBJECT_IS_NATFUNC(obj)) { duk_push_sprintf(thr, "function %s() { [native code] }", (const char *) func_name); } else if (DUK_HOBJECT_IS_BOUNDFUNC(obj)) { duk_push_sprintf(thr, "function %s() { [bound code] }", (const char *) func_name); } else { goto type_error; } } else if (DUK_TVAL_IS_LIGHTFUNC(tv)) { duk_push_lightfunc_tostring(thr, tv); } else { goto type_error; } return 1; type_error: DUK_DCERROR_TYPE_INVALID_ARGS(thr); } #endif /* Always present because the native function pointer is needed in call * handling. */ DUK_INTERNAL duk_ret_t duk_bi_function_prototype_call(duk_hthread *thr) { /* .call() is dealt with in call handling by simulating its * effects so this function is actually never called. */ DUK_UNREF(thr); return DUK_RET_TYPE_ERROR; } DUK_INTERNAL duk_ret_t duk_bi_function_prototype_apply(duk_hthread *thr) { /* Like .call(), never actually called. */ DUK_UNREF(thr); return DUK_RET_TYPE_ERROR; } DUK_INTERNAL duk_ret_t duk_bi_reflect_apply(duk_hthread *thr) { /* Like .call(), never actually called. */ DUK_UNREF(thr); return DUK_RET_TYPE_ERROR; } DUK_INTERNAL duk_ret_t duk_bi_reflect_construct(duk_hthread *thr) { /* Like .call(), never actually called. */ DUK_UNREF(thr); return DUK_RET_TYPE_ERROR; } #if defined(DUK_USE_FUNCTION_BUILTIN) /* Create a bound function which points to a target function which may * be bound or non-bound. If the target is bound, the argument lists * and 'this' binding of the functions are merged and the resulting * function points directly to the non-bound target. */ DUK_INTERNAL duk_ret_t duk_bi_function_prototype_bind(duk_hthread *thr) { duk_hboundfunc *h_bound; duk_idx_t nargs; /* bound args, not counting 'this' binding */ duk_idx_t bound_nargs; duk_int_t bound_len; duk_tval *tv_prevbound; duk_idx_t n_prevbound; duk_tval *tv_res; duk_tval *tv_tmp; /* XXX: C API call, e.g. duk_push_bound_function(thr, target_idx, nargs); */ /* Vararg function, careful arg handling, e.g. thisArg may not * be present. */ nargs = duk_get_top(thr) - 1; /* actual args, not counting 'this' binding */ if (nargs < 0) { nargs++; duk_push_undefined(thr); } DUK_ASSERT(nargs >= 0); /* Limit 'nargs' for bound functions to guarantee arithmetic * below will never wrap. */ if (nargs > (duk_idx_t) DUK_HBOUNDFUNC_MAX_ARGS) { DUK_DCERROR_RANGE_INVALID_COUNT(thr); } duk_push_this(thr); duk_require_callable(thr, -1); /* [ thisArg arg1 ... argN func ] (thisArg+args == nargs+1 total) */ DUK_ASSERT_TOP(thr, nargs + 2); /* Create bound function object. */ h_bound = duk_push_hboundfunc(thr); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&h_bound->target)); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&h_bound->this_binding)); DUK_ASSERT(h_bound->args == NULL); DUK_ASSERT(h_bound->nargs == 0); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) h_bound) == NULL); /* [ thisArg arg1 ... argN func boundFunc ] */ /* If the target is a bound function, argument lists must be * merged. The 'this' binding closest to the target function * wins because in call handling the 'this' gets replaced over * and over again until we call the non-bound function. */ tv_prevbound = NULL; n_prevbound = 0; tv_tmp = DUK_GET_TVAL_POSIDX(thr, 0); DUK_TVAL_SET_TVAL(&h_bound->this_binding, tv_tmp); tv_tmp = DUK_GET_TVAL_NEGIDX(thr, -2); DUK_TVAL_SET_TVAL(&h_bound->target, tv_tmp); if (DUK_TVAL_IS_OBJECT(tv_tmp)) { duk_hobject *h_target; duk_hobject *bound_proto; h_target = DUK_TVAL_GET_OBJECT(tv_tmp); DUK_ASSERT(DUK_HOBJECT_IS_CALLABLE(h_target)); /* Internal prototype must be copied from the target. * For lightfuncs Function.prototype is used and is already * in place. */ bound_proto = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_target); DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, (duk_hobject *) h_bound, bound_proto); /* The 'strict' flag is copied to get the special [[Get]] of E5.1 * Section 15.3.5.4 to apply when a 'caller' value is a strict bound * function. Not sure if this is correct, because the specification * is a bit ambiguous on this point but it would make sense. */ /* Strictness is inherited from target. */ if (DUK_HOBJECT_HAS_STRICT(h_target)) { DUK_HOBJECT_SET_STRICT((duk_hobject *) h_bound); } if (DUK_HOBJECT_HAS_BOUNDFUNC(h_target)) { duk_hboundfunc *h_boundtarget; h_boundtarget = (duk_hboundfunc *) (void *) h_target; /* The final function should always be non-bound, unless * there's a bug in the internals. Assert for it. */ DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(&h_boundtarget->target) || (DUK_TVAL_IS_OBJECT(&h_boundtarget->target) && DUK_HOBJECT_IS_CALLABLE(DUK_TVAL_GET_OBJECT(&h_boundtarget->target)) && !DUK_HOBJECT_IS_BOUNDFUNC(DUK_TVAL_GET_OBJECT(&h_boundtarget->target)))); DUK_TVAL_SET_TVAL(&h_bound->target, &h_boundtarget->target); DUK_TVAL_SET_TVAL(&h_bound->this_binding, &h_boundtarget->this_binding); tv_prevbound = h_boundtarget->args; n_prevbound = h_boundtarget->nargs; } } else { /* Lightfuncs are always strict. */ duk_hobject *bound_proto; DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv_tmp)); DUK_HOBJECT_SET_STRICT((duk_hobject *) h_bound); bound_proto = thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]; DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, (duk_hobject *) h_bound, bound_proto); } DUK_TVAL_INCREF(thr, &h_bound->target); /* old values undefined, no decref needed */ DUK_TVAL_INCREF(thr, &h_bound->this_binding); bound_nargs = n_prevbound + nargs; if (bound_nargs > (duk_idx_t) DUK_HBOUNDFUNC_MAX_ARGS) { DUK_DCERROR_RANGE_INVALID_COUNT(thr); } tv_res = (duk_tval *) DUK_ALLOC_CHECKED(thr, ((duk_size_t) bound_nargs) * sizeof(duk_tval)); DUK_ASSERT(tv_res != NULL || bound_nargs == 0); DUK_ASSERT(h_bound->args == NULL); DUK_ASSERT(h_bound->nargs == 0); h_bound->args = tv_res; h_bound->nargs = bound_nargs; DUK_ASSERT(n_prevbound >= 0); duk_copy_tvals_incref(thr, tv_res, tv_prevbound, (duk_size_t) n_prevbound); DUK_ASSERT(nargs >= 0); duk_copy_tvals_incref(thr, tv_res + n_prevbound, DUK_GET_TVAL_POSIDX(thr, 1), (duk_size_t) nargs); /* [ thisArg arg1 ... argN func boundFunc ] */ /* Bound function 'length' property is interesting. * For lightfuncs, simply read the virtual property. */ duk_get_prop_stridx_short(thr, -2, DUK_STRIDX_LENGTH); bound_len = duk_get_int(thr, -1); /* ES2015: no coercion */ if (bound_len < nargs) { bound_len = 0; } else { bound_len -= nargs; } if (sizeof(duk_int_t) > 4 && bound_len > (duk_int_t) DUK_UINT32_MAX) { bound_len = (duk_int_t) DUK_UINT32_MAX; } duk_pop(thr); DUK_ASSERT(bound_len >= 0); tv_tmp = thr->valstack_top++; DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv_tmp)); DUK_ASSERT(!DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv_tmp)); DUK_TVAL_SET_U32(tv_tmp, (duk_uint32_t) bound_len); /* in-place update, fastint */ duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_C); /* attrs in E6 Section 9.2.4 */ /* XXX: could these be virtual? */ /* Caller and arguments must use the same thrower, [[ThrowTypeError]]. */ duk_xdef_prop_stridx_thrower(thr, -1, DUK_STRIDX_CALLER); duk_xdef_prop_stridx_thrower(thr, -1, DUK_STRIDX_LC_ARGUMENTS); /* Function name and fileName (non-standard). */ duk_push_literal(thr, "bound "); /* ES2015 19.2.3.2. */ duk_get_prop_stridx(thr, -3, DUK_STRIDX_NAME); if (!duk_is_string_notsymbol(thr, -1)) { /* ES2015 has requirement to check that .name of target is a string * (also must check for Symbol); if not, targetName should be the * empty string. ES2015 19.2.3.2. */ duk_pop(thr); duk_push_hstring_empty(thr); } duk_concat(thr, 2); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_C); #if defined(DUK_USE_FUNC_FILENAME_PROPERTY) duk_get_prop_stridx_short(thr, -2, DUK_STRIDX_FILE_NAME); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_C); #endif DUK_DDD(DUK_DDDPRINT("created bound function: %!iT", (duk_tval *) duk_get_tval(thr, -1))); return 1; } #endif /* DUK_USE_FUNCTION_BUILTIN */ /* %NativeFunctionPrototype% .length getter. */ DUK_INTERNAL duk_ret_t duk_bi_native_function_length(duk_hthread *thr) { duk_tval *tv; duk_hnatfunc *h; duk_int16_t func_nargs; tv = duk_get_borrowed_this_tval(thr); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_OBJECT(tv)) { h = (duk_hnatfunc *) DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (!DUK_HOBJECT_IS_NATFUNC((duk_hobject *) h)) { goto fail_type; } func_nargs = h->nargs; duk_push_int(thr, func_nargs == DUK_HNATFUNC_NARGS_VARARGS ? 0 : func_nargs); } else if (DUK_TVAL_IS_LIGHTFUNC(tv)) { duk_small_uint_t lf_flags; duk_small_uint_t lf_len; lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv); lf_len = DUK_LFUNC_FLAGS_GET_LENGTH(lf_flags); duk_push_uint(thr, lf_len); } else { goto fail_type; } return 1; fail_type: DUK_DCERROR_TYPE_INVALID_ARGS(thr); } /* %NativeFunctionPrototype% .name getter. */ DUK_INTERNAL duk_ret_t duk_bi_native_function_name(duk_hthread *thr) { duk_tval *tv; duk_hnatfunc *h; tv = duk_get_borrowed_this_tval(thr); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_OBJECT(tv)) { h = (duk_hnatfunc *) DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); if (!DUK_HOBJECT_IS_NATFUNC((duk_hobject *) h)) { goto fail_type; } #if 0 duk_push_hnatfunc_name(thr, h); #endif duk_push_hstring_empty(thr); } else if (DUK_TVAL_IS_LIGHTFUNC(tv)) { duk_push_lightfunc_name(thr, tv); } else { goto fail_type; } return 1; fail_type: DUK_DCERROR_TYPE_INVALID_ARGS(thr); } #if defined(DUK_USE_SYMBOL_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_function_prototype_hasinstance(duk_hthread *thr) { /* This binding: RHS, stack index 0: LHS. */ duk_bool_t ret; ret = duk_js_instanceof_ordinary(thr, DUK_GET_TVAL_POSIDX(thr, 0), DUK_GET_THIS_TVAL_PTR(thr)); duk_push_boolean(thr, ret); return 1; } #endif /* DUK_USE_SYMBOL_BUILTIN */ /* * Global object built-ins */ /* #include duk_internal.h -> already included */ /* * Encoding/decoding helpers */ /* XXX: Could add fast path (for each transform callback) with direct byte * lookups (no shifting) and no explicit check for x < 0x80 before table * lookup. */ /* Macros for creating and checking bitmasks for character encoding. * Bit number is a bit counterintuitive, but minimizes code size. */ #define DUK__MKBITS(a,b,c,d,e,f,g,h) ((duk_uint8_t) ( \ ((a) << 0) | ((b) << 1) | ((c) << 2) | ((d) << 3) | \ ((e) << 4) | ((f) << 5) | ((g) << 6) | ((h) << 7) \ )) #define DUK__CHECK_BITMASK(table,cp) ((table)[(cp) >> 3] & (1 << ((cp) & 0x07))) /* E5.1 Section 15.1.3.3: uriReserved + uriUnescaped + '#' */ DUK_LOCAL const duk_uint8_t duk__encode_uriunescaped_table[16] = { DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */ DUK__MKBITS(0, 1, 0, 1, 1, 0, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x20-0x2f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 0, 1, 0, 1), /* 0x30-0x3f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x40-0x4f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 0, 1), /* 0x50-0x5f */ DUK__MKBITS(0, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x60-0x6f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 1, 0), /* 0x70-0x7f */ }; /* E5.1 Section 15.1.3.4: uriUnescaped */ DUK_LOCAL const duk_uint8_t duk__encode_uricomponent_unescaped_table[16] = { DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */ DUK__MKBITS(0, 1, 0, 0, 0, 0, 0, 1), DUK__MKBITS(1, 1, 1, 0, 0, 1, 1, 0), /* 0x20-0x2f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 0, 0, 0, 0, 0, 0), /* 0x30-0x3f */ DUK__MKBITS(0, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x40-0x4f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 0, 1), /* 0x50-0x5f */ DUK__MKBITS(0, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x60-0x6f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 1, 0), /* 0x70-0x7f */ }; /* E5.1 Section 15.1.3.1: uriReserved + '#' */ DUK_LOCAL const duk_uint8_t duk__decode_uri_reserved_table[16] = { DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */ DUK__MKBITS(0, 0, 0, 1, 1, 0, 1, 0), DUK__MKBITS(0, 0, 0, 1, 1, 0, 0, 1), /* 0x20-0x2f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 1, 1, 0, 1, 0, 1), /* 0x30-0x3f */ DUK__MKBITS(1, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x40-0x4f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x50-0x5f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x60-0x6f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x70-0x7f */ }; /* E5.1 Section 15.1.3.2: empty */ DUK_LOCAL const duk_uint8_t duk__decode_uri_component_reserved_table[16] = { DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x20-0x2f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x30-0x3f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x40-0x4f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x50-0x5f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x60-0x6f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x70-0x7f */ }; #if defined(DUK_USE_SECTION_B) /* E5.1 Section B.2.2, step 7. */ DUK_LOCAL const duk_uint8_t duk__escape_unescaped_table[16] = { DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */ DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 1, 1, 0, 1, 1, 1), /* 0x20-0x2f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 0, 0, 0, 0, 0, 0), /* 0x30-0x3f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x40-0x4f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 0, 1), /* 0x50-0x5f */ DUK__MKBITS(0, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x60-0x6f */ DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 0, 0) /* 0x70-0x7f */ }; #endif /* DUK_USE_SECTION_B */ typedef struct { duk_hthread *thr; duk_hstring *h_str; duk_bufwriter_ctx bw; const duk_uint8_t *p; const duk_uint8_t *p_start; const duk_uint8_t *p_end; } duk__transform_context; typedef void (*duk__transform_callback)(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp); /* XXX: refactor and share with other code */ DUK_LOCAL duk_small_int_t duk__decode_hex_escape(const duk_uint8_t *p, duk_small_int_t n) { duk_small_int_t ch; duk_small_int_t t = 0; while (n > 0) { t = t * 16; ch = (duk_small_int_t) duk_hex_dectab[*p++]; if (DUK_LIKELY(ch >= 0)) { t += ch; } else { return -1; } n--; } return t; } DUK_LOCAL int duk__transform_helper(duk_hthread *thr, duk__transform_callback callback, const void *udata) { duk__transform_context tfm_ctx_alloc; duk__transform_context *tfm_ctx = &tfm_ctx_alloc; duk_codepoint_t cp; tfm_ctx->thr = thr; tfm_ctx->h_str = duk_to_hstring(thr, 0); DUK_ASSERT(tfm_ctx->h_str != NULL); DUK_BW_INIT_PUSHBUF(thr, &tfm_ctx->bw, DUK_HSTRING_GET_BYTELEN(tfm_ctx->h_str)); /* initial size guess */ tfm_ctx->p_start = DUK_HSTRING_GET_DATA(tfm_ctx->h_str); tfm_ctx->p_end = tfm_ctx->p_start + DUK_HSTRING_GET_BYTELEN(tfm_ctx->h_str); tfm_ctx->p = tfm_ctx->p_start; while (tfm_ctx->p < tfm_ctx->p_end) { cp = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(thr, &tfm_ctx->p, tfm_ctx->p_start, tfm_ctx->p_end); callback(tfm_ctx, udata, cp); } DUK_BW_COMPACT(thr, &tfm_ctx->bw); (void) duk_buffer_to_string(thr, -1); /* Safe if transform is safe. */ return 1; } DUK_LOCAL void duk__transform_callback_encode_uri(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp) { duk_uint8_t xutf8_buf[DUK_UNICODE_MAX_XUTF8_LENGTH]; duk_small_int_t len; duk_codepoint_t cp1, cp2; duk_small_int_t i, t; const duk_uint8_t *unescaped_table = (const duk_uint8_t *) udata; /* UTF-8 encoded bytes escaped as %xx%xx%xx... -> 3 * nbytes. * Codepoint range is restricted so this is a slightly too large * but doesn't matter. */ DUK_BW_ENSURE(tfm_ctx->thr, &tfm_ctx->bw, 3 * DUK_UNICODE_MAX_XUTF8_LENGTH); if (cp < 0) { goto uri_error; } else if ((cp < 0x80L) && DUK__CHECK_BITMASK(unescaped_table, cp)) { DUK_BW_WRITE_RAW_U8(tfm_ctx->thr, &tfm_ctx->bw, (duk_uint8_t) cp); return; } else if (cp >= 0xdc00L && cp <= 0xdfffL) { goto uri_error; } else if (cp >= 0xd800L && cp <= 0xdbffL) { /* Needs lookahead */ if (duk_unicode_decode_xutf8(tfm_ctx->thr, &tfm_ctx->p, tfm_ctx->p_start, tfm_ctx->p_end, (duk_ucodepoint_t *) &cp2) == 0) { goto uri_error; } if (!(cp2 >= 0xdc00L && cp2 <= 0xdfffL)) { goto uri_error; } cp1 = cp; cp = (duk_codepoint_t) (((cp1 - 0xd800L) << 10) + (cp2 - 0xdc00L) + 0x10000L); } else if (cp > 0x10ffffL) { /* Although we can allow non-BMP characters (they'll decode * back into surrogate pairs), we don't allow extended UTF-8 * characters; they would encode to URIs which won't decode * back because of strict UTF-8 checks in URI decoding. * (However, we could just as well allow them here.) */ goto uri_error; } else { /* Non-BMP characters within valid UTF-8 range: encode as is. * They'll decode back into surrogate pairs if the escaped * output is decoded. */ ; } len = duk_unicode_encode_xutf8((duk_ucodepoint_t) cp, xutf8_buf); for (i = 0; i < len; i++) { t = (duk_small_int_t) xutf8_buf[i]; DUK_BW_WRITE_RAW_U8_3(tfm_ctx->thr, &tfm_ctx->bw, DUK_ASC_PERCENT, (duk_uint8_t) duk_uc_nybbles[t >> 4], (duk_uint8_t) duk_uc_nybbles[t & 0x0f]); } return; uri_error: DUK_ERROR_URI(tfm_ctx->thr, DUK_STR_INVALID_INPUT); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__transform_callback_decode_uri(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp) { const duk_uint8_t *reserved_table = (const duk_uint8_t *) udata; duk_small_uint_t utf8_blen; duk_codepoint_t min_cp; duk_small_int_t t; /* must be signed */ duk_small_uint_t i; /* Maximum write size: XUTF8 path writes max DUK_UNICODE_MAX_XUTF8_LENGTH, * percent escape path writes max two times CESU-8 encoded BMP length. */ DUK_BW_ENSURE(tfm_ctx->thr, &tfm_ctx->bw, (DUK_UNICODE_MAX_XUTF8_LENGTH >= 2 * DUK_UNICODE_MAX_CESU8_BMP_LENGTH ? DUK_UNICODE_MAX_XUTF8_LENGTH : DUK_UNICODE_MAX_CESU8_BMP_LENGTH)); if (cp == (duk_codepoint_t) '%') { const duk_uint8_t *p = tfm_ctx->p; duk_size_t left = (duk_size_t) (tfm_ctx->p_end - p); /* bytes left */ DUK_DDD(DUK_DDDPRINT("percent encoding, left=%ld", (long) left)); if (left < 2) { goto uri_error; } t = duk__decode_hex_escape(p, 2); DUK_DDD(DUK_DDDPRINT("first byte: %ld", (long) t)); if (t < 0) { goto uri_error; } if (t < 0x80) { if (DUK__CHECK_BITMASK(reserved_table, t)) { /* decode '%xx' to '%xx' if decoded char in reserved set */ DUK_ASSERT(tfm_ctx->p - 1 >= tfm_ctx->p_start); DUK_BW_WRITE_RAW_U8_3(tfm_ctx->thr, &tfm_ctx->bw, DUK_ASC_PERCENT, p[0], p[1]); } else { DUK_BW_WRITE_RAW_U8(tfm_ctx->thr, &tfm_ctx->bw, (duk_uint8_t) t); } tfm_ctx->p += 2; return; } /* Decode UTF-8 codepoint from a sequence of hex escapes. The * first byte of the sequence has been decoded to 't'. * * Note that UTF-8 validation must be strict according to the * specification: E5.1 Section 15.1.3, decode algorithm step * 4.d.vii.8. URIError from non-shortest encodings is also * specifically noted in the spec. */ DUK_ASSERT(t >= 0x80); if (t < 0xc0) { /* continuation byte */ goto uri_error; } else if (t < 0xe0) { /* 110x xxxx; 2 bytes */ utf8_blen = 2; min_cp = 0x80L; cp = t & 0x1f; } else if (t < 0xf0) { /* 1110 xxxx; 3 bytes */ utf8_blen = 3; min_cp = 0x800L; cp = t & 0x0f; } else if (t < 0xf8) { /* 1111 0xxx; 4 bytes */ utf8_blen = 4; min_cp = 0x10000L; cp = t & 0x07; } else { /* extended utf-8 not allowed for URIs */ goto uri_error; } if (left < utf8_blen * 3 - 1) { /* '%xx%xx...%xx', p points to char after first '%' */ goto uri_error; } p += 3; for (i = 1; i < utf8_blen; i++) { /* p points to digit part ('%xy', p points to 'x') */ t = duk__decode_hex_escape(p, 2); DUK_DDD(DUK_DDDPRINT("i=%ld utf8_blen=%ld cp=%ld t=0x%02lx", (long) i, (long) utf8_blen, (long) cp, (unsigned long) t)); if (t < 0) { goto uri_error; } if ((t & 0xc0) != 0x80) { goto uri_error; } cp = (cp << 6) + (t & 0x3f); p += 3; } p--; /* p overshoots */ tfm_ctx->p = p; DUK_DDD(DUK_DDDPRINT("final cp=%ld, min_cp=%ld", (long) cp, (long) min_cp)); if (cp < min_cp || cp > 0x10ffffL || (cp >= 0xd800L && cp <= 0xdfffL)) { goto uri_error; } /* The E5.1 algorithm checks whether or not a decoded codepoint * is below 0x80 and perhaps may be in the "reserved" set. * This seems pointless because the single byte UTF-8 case is * handled separately, and non-shortest encodings are rejected. * So, 'cp' cannot be below 0x80 here, and thus cannot be in * the reserved set. */ /* utf-8 validation ensures these */ DUK_ASSERT(cp >= 0x80L && cp <= 0x10ffffL); if (cp >= 0x10000L) { cp -= 0x10000L; DUK_ASSERT(cp < 0x100000L); DUK_BW_WRITE_RAW_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, ((cp >> 10) + 0xd800L)); DUK_BW_WRITE_RAW_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, ((cp & 0x03ffL) + 0xdc00L)); } else { DUK_BW_WRITE_RAW_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, cp); } } else { DUK_BW_WRITE_RAW_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, cp); } return; uri_error: DUK_ERROR_URI(tfm_ctx->thr, DUK_STR_INVALID_INPUT); DUK_WO_NORETURN(return;); } #if defined(DUK_USE_SECTION_B) DUK_LOCAL void duk__transform_callback_escape(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp) { DUK_UNREF(udata); DUK_BW_ENSURE(tfm_ctx->thr, &tfm_ctx->bw, 6); if (cp < 0) { goto esc_error; } else if ((cp < 0x80L) && DUK__CHECK_BITMASK(duk__escape_unescaped_table, cp)) { DUK_BW_WRITE_RAW_U8(tfm_ctx->thr, &tfm_ctx->bw, (duk_uint8_t) cp); } else if (cp < 0x100L) { DUK_BW_WRITE_RAW_U8_3(tfm_ctx->thr, &tfm_ctx->bw, (duk_uint8_t) DUK_ASC_PERCENT, (duk_uint8_t) duk_uc_nybbles[cp >> 4], (duk_uint8_t) duk_uc_nybbles[cp & 0x0f]); } else if (cp < 0x10000L) { DUK_BW_WRITE_RAW_U8_6(tfm_ctx->thr, &tfm_ctx->bw, (duk_uint8_t) DUK_ASC_PERCENT, (duk_uint8_t) DUK_ASC_LC_U, (duk_uint8_t) duk_uc_nybbles[cp >> 12], (duk_uint8_t) duk_uc_nybbles[(cp >> 8) & 0x0f], (duk_uint8_t) duk_uc_nybbles[(cp >> 4) & 0x0f], (duk_uint8_t) duk_uc_nybbles[cp & 0x0f]); } else { /* Characters outside BMP cannot be escape()'d. We could * encode them as surrogate pairs (for codepoints inside * valid UTF-8 range, but not extended UTF-8). Because * escape() and unescape() are legacy functions, we don't. */ goto esc_error; } return; esc_error: DUK_ERROR_TYPE(tfm_ctx->thr, DUK_STR_INVALID_INPUT); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__transform_callback_unescape(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp) { duk_small_int_t t; DUK_UNREF(udata); if (cp == (duk_codepoint_t) '%') { const duk_uint8_t *p = tfm_ctx->p; duk_size_t left = (duk_size_t) (tfm_ctx->p_end - p); /* bytes left */ if (left >= 5 && p[0] == 'u' && ((t = duk__decode_hex_escape(p + 1, 4)) >= 0)) { cp = (duk_codepoint_t) t; tfm_ctx->p += 5; } else if (left >= 2 && ((t = duk__decode_hex_escape(p, 2)) >= 0)) { cp = (duk_codepoint_t) t; tfm_ctx->p += 2; } } DUK_BW_WRITE_ENSURE_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, cp); } #endif /* DUK_USE_SECTION_B */ /* * Eval * * Eval needs to handle both a "direct eval" and an "indirect eval". * Direct eval handling needs access to the caller's activation so that its * lexical environment can be accessed. A direct eval is only possible from * ECMAScript code; an indirect eval call is possible also from C code. * When an indirect eval call is made from C code, there may not be a * calling activation at all which needs careful handling. */ DUK_INTERNAL duk_ret_t duk_bi_global_object_eval(duk_hthread *thr) { duk_hstring *h; duk_activation *act_caller; duk_activation *act_eval; duk_hcompfunc *func; duk_hobject *outer_lex_env; duk_hobject *outer_var_env; duk_bool_t this_to_global = 1; duk_small_uint_t comp_flags; duk_int_t level = -2; duk_small_uint_t call_flags; DUK_ASSERT(duk_get_top(thr) == 1 || duk_get_top(thr) == 2); /* 2 when called by debugger */ DUK_ASSERT(thr->callstack_top >= 1); /* at least this function exists */ DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT((thr->callstack_curr->flags & DUK_ACT_FLAG_DIRECT_EVAL) == 0 || /* indirect eval */ (thr->callstack_top >= 2)); /* if direct eval, calling activation must exist */ /* * callstack_top - 1 --> this function * callstack_top - 2 --> caller (may not exist) * * If called directly from C, callstack_top might be 1. If calling * activation doesn't exist, call must be indirect. */ h = duk_get_hstring_notsymbol(thr, 0); if (!h) { /* Symbol must be returned as is, like any non-string values. */ return 1; /* return arg as-is */ } #if defined(DUK_USE_DEBUGGER_SUPPORT) /* NOTE: level is used only by the debugger and should never be present * for an ECMAScript eval(). */ DUK_ASSERT(level == -2); /* by default, use caller's environment */ if (duk_get_top(thr) >= 2 && duk_is_number(thr, 1)) { level = duk_get_int(thr, 1); } DUK_ASSERT(level <= -2); /* This is guaranteed by debugger code. */ #endif /* [ source ] */ comp_flags = DUK_COMPILE_EVAL; act_eval = thr->callstack_curr; /* this function */ DUK_ASSERT(act_eval != NULL); act_caller = duk_hthread_get_activation_for_level(thr, level); if (act_caller != NULL) { /* Have a calling activation, check for direct eval (otherwise * assume indirect eval. */ if ((act_caller->flags & DUK_ACT_FLAG_STRICT) && (act_eval->flags & DUK_ACT_FLAG_DIRECT_EVAL)) { /* Only direct eval inherits strictness from calling code * (E5.1 Section 10.1.1). */ comp_flags |= DUK_COMPILE_STRICT; } } else { DUK_ASSERT((act_eval->flags & DUK_ACT_FLAG_DIRECT_EVAL) == 0); } duk_push_hstring_stridx(thr, DUK_STRIDX_INPUT); /* XXX: copy from caller? */ duk_js_compile(thr, (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h), (duk_size_t) DUK_HSTRING_GET_BYTELEN(h), comp_flags); func = (duk_hcompfunc *) duk_known_hobject(thr, -1); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC((duk_hobject *) func)); /* [ source template ] */ /* E5 Section 10.4.2 */ if (act_eval->flags & DUK_ACT_FLAG_DIRECT_EVAL) { DUK_ASSERT(thr->callstack_top >= 2); DUK_ASSERT(act_caller != NULL); if (act_caller->lex_env == NULL) { DUK_ASSERT(act_caller->var_env == NULL); DUK_DDD(DUK_DDDPRINT("delayed environment initialization")); /* this may have side effects, so re-lookup act */ duk_js_init_activation_environment_records_delayed(thr, act_caller); } DUK_ASSERT(act_caller->lex_env != NULL); DUK_ASSERT(act_caller->var_env != NULL); this_to_global = 0; if (DUK_HOBJECT_HAS_STRICT((duk_hobject *) func)) { duk_hdecenv *new_env; duk_hobject *act_lex_env; DUK_DDD(DUK_DDDPRINT("direct eval call to a strict function -> " "var_env and lex_env to a fresh env, " "this_binding to caller's this_binding")); act_lex_env = act_caller->lex_env; new_env = duk_hdecenv_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV)); DUK_ASSERT(new_env != NULL); duk_push_hobject(thr, (duk_hobject *) new_env); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) new_env) == NULL); DUK_HOBJECT_SET_PROTOTYPE(thr->heap, (duk_hobject *) new_env, act_lex_env); DUK_HOBJECT_INCREF_ALLOWNULL(thr, act_lex_env); DUK_DDD(DUK_DDDPRINT("new_env allocated: %!iO", (duk_heaphdr *) new_env)); outer_lex_env = (duk_hobject *) new_env; outer_var_env = (duk_hobject *) new_env; duk_insert(thr, 0); /* stash to bottom of value stack to keep new_env reachable for duration of eval */ /* compiler's responsibility */ DUK_ASSERT(DUK_HOBJECT_HAS_NEWENV((duk_hobject *) func)); } else { DUK_DDD(DUK_DDDPRINT("direct eval call to a non-strict function -> " "var_env and lex_env to caller's envs, " "this_binding to caller's this_binding")); outer_lex_env = act_caller->lex_env; outer_var_env = act_caller->var_env; /* compiler's responsibility */ DUK_ASSERT(!DUK_HOBJECT_HAS_NEWENV((duk_hobject *) func)); } } else { DUK_DDD(DUK_DDDPRINT("indirect eval call -> var_env and lex_env to " "global object, this_binding to global object")); this_to_global = 1; outer_lex_env = thr->builtins[DUK_BIDX_GLOBAL_ENV]; outer_var_env = thr->builtins[DUK_BIDX_GLOBAL_ENV]; } /* Eval code doesn't need an automatic .prototype object. */ duk_js_push_closure(thr, func, outer_var_env, outer_lex_env, 0 /*add_auto_proto*/); /* [ env? source template closure ] */ if (this_to_global) { DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); duk_push_hobject_bidx(thr, DUK_BIDX_GLOBAL); } else { duk_tval *tv; DUK_ASSERT(thr->callstack_top >= 2); DUK_ASSERT(act_caller != NULL); tv = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + act_caller->bottom_byteoff - sizeof(duk_tval)); /* this is just beneath bottom */ DUK_ASSERT(tv >= thr->valstack); duk_push_tval(thr, tv); } DUK_DDD(DUK_DDDPRINT("eval -> lex_env=%!iO, var_env=%!iO, this_binding=%!T", (duk_heaphdr *) outer_lex_env, (duk_heaphdr *) outer_var_env, duk_get_tval(thr, -1))); /* [ env? source template closure this ] */ call_flags = 0; if (act_eval->flags & DUK_ACT_FLAG_DIRECT_EVAL) { /* Set DIRECT_EVAL flag for the call; it's not strictly * needed for the 'inner' eval call (the eval body) but * current new.target implementation expects to find it * so it can traverse direct eval chains up to the real * calling function. */ call_flags |= DUK_CALL_FLAG_DIRECT_EVAL; } duk_handle_call_unprotected_nargs(thr, 0, call_flags); /* [ env? source template result ] */ return 1; } /* * Parsing of ints and floats */ #if defined(DUK_USE_GLOBAL_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_global_object_parse_int(duk_hthread *thr) { duk_int32_t radix; duk_small_uint_t s2n_flags; DUK_ASSERT_TOP(thr, 2); duk_to_string(thr, 0); /* Reject symbols. */ radix = duk_to_int32(thr, 1); /* While parseInt() recognizes 0xdeadbeef, it doesn't recognize * ES2015 0o123 or 0b10001. */ s2n_flags = DUK_S2N_FLAG_TRIM_WHITE | DUK_S2N_FLAG_ALLOW_GARBAGE | DUK_S2N_FLAG_ALLOW_PLUS | DUK_S2N_FLAG_ALLOW_MINUS | DUK_S2N_FLAG_ALLOW_LEADING_ZERO | DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT; /* Specification stripPrefix maps to DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT. * * Don't autodetect octals (from leading zeroes), require user code to * provide an explicit radix 8 for parsing octal. See write-up from Mozilla: * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt#ECMAScript_5_Removes_Octal_Interpretation */ if (radix != 0) { if (radix < 2 || radix > 36) { goto ret_nan; } if (radix != 16) { s2n_flags &= ~DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT; } } else { radix = 10; } duk_dup_0(thr); duk_numconv_parse(thr, (duk_small_int_t) radix, s2n_flags); return 1; ret_nan: duk_push_nan(thr); return 1; } #endif /* DUK_USE_GLOBAL_BUILTIN */ #if defined(DUK_USE_GLOBAL_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_global_object_parse_float(duk_hthread *thr) { duk_small_uint_t s2n_flags; DUK_ASSERT_TOP(thr, 1); duk_to_string(thr, 0); /* Reject symbols. */ /* XXX: check flags */ s2n_flags = DUK_S2N_FLAG_TRIM_WHITE | DUK_S2N_FLAG_ALLOW_EXP | DUK_S2N_FLAG_ALLOW_GARBAGE | DUK_S2N_FLAG_ALLOW_PLUS | DUK_S2N_FLAG_ALLOW_MINUS | DUK_S2N_FLAG_ALLOW_INF | DUK_S2N_FLAG_ALLOW_FRAC | DUK_S2N_FLAG_ALLOW_NAKED_FRAC | DUK_S2N_FLAG_ALLOW_EMPTY_FRAC | DUK_S2N_FLAG_ALLOW_LEADING_ZERO; duk_numconv_parse(thr, 10 /*radix*/, s2n_flags); return 1; } #endif /* DUK_USE_GLOBAL_BUILTIN */ /* * Number checkers */ #if defined(DUK_USE_GLOBAL_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_global_object_is_nan(duk_hthread *thr) { duk_double_t d = duk_to_number(thr, 0); duk_push_boolean(thr, (duk_bool_t) DUK_ISNAN(d)); return 1; } #endif /* DUK_USE_GLOBAL_BUILTIN */ #if defined(DUK_USE_GLOBAL_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_global_object_is_finite(duk_hthread *thr) { duk_double_t d = duk_to_number(thr, 0); duk_push_boolean(thr, (duk_bool_t) DUK_ISFINITE(d)); return 1; } #endif /* DUK_USE_GLOBAL_BUILTIN */ /* * URI handling */ #if defined(DUK_USE_GLOBAL_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_global_object_decode_uri(duk_hthread *thr) { return duk__transform_helper(thr, duk__transform_callback_decode_uri, (const void *) duk__decode_uri_reserved_table); } DUK_INTERNAL duk_ret_t duk_bi_global_object_decode_uri_component(duk_hthread *thr) { return duk__transform_helper(thr, duk__transform_callback_decode_uri, (const void *) duk__decode_uri_component_reserved_table); } DUK_INTERNAL duk_ret_t duk_bi_global_object_encode_uri(duk_hthread *thr) { return duk__transform_helper(thr, duk__transform_callback_encode_uri, (const void *) duk__encode_uriunescaped_table); } DUK_INTERNAL duk_ret_t duk_bi_global_object_encode_uri_component(duk_hthread *thr) { return duk__transform_helper(thr, duk__transform_callback_encode_uri, (const void *) duk__encode_uricomponent_unescaped_table); } #if defined(DUK_USE_SECTION_B) DUK_INTERNAL duk_ret_t duk_bi_global_object_escape(duk_hthread *thr) { return duk__transform_helper(thr, duk__transform_callback_escape, (const void *) NULL); } DUK_INTERNAL duk_ret_t duk_bi_global_object_unescape(duk_hthread *thr) { return duk__transform_helper(thr, duk__transform_callback_unescape, (const void *) NULL); } #endif /* DUK_USE_SECTION_B */ #endif /* DUK_USE_GLOBAL_BUILTIN */ /* automatic undefs */ #undef DUK__CHECK_BITMASK #undef DUK__MKBITS /* * JSON built-ins. * * See doc/json.rst. * * Codepoints are handled as duk_uint_fast32_t to ensure that the full * unsigned 32-bit range is supported. This matters to e.g. JX. * * Input parsing doesn't do an explicit end-of-input check at all. This is * safe: input string data is always NUL-terminated (0x00) and valid JSON * inputs never contain plain NUL characters, so that as long as syntax checks * are correct, we'll never read past the NUL. This approach reduces code size * and improves parsing performance, but it's critical that syntax checks are * indeed correct! */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_JSON_SUPPORT) /* * Local defines and forward declarations. */ #define DUK__JSON_DECSTR_BUFSIZE 128 #define DUK__JSON_DECSTR_CHUNKSIZE 64 #define DUK__JSON_ENCSTR_CHUNKSIZE 64 #define DUK__JSON_STRINGIFY_BUFSIZE 128 #define DUK__JSON_MAX_ESC_LEN 10 /* '\Udeadbeef' */ DUK_LOCAL_DECL void duk__dec_syntax_error(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__dec_eat_white(duk_json_dec_ctx *js_ctx); #if defined(DUK_USE_JX) DUK_LOCAL_DECL duk_uint8_t duk__dec_peek(duk_json_dec_ctx *js_ctx); #endif DUK_LOCAL_DECL duk_uint8_t duk__dec_get(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL duk_uint8_t duk__dec_get_nonwhite(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL duk_uint_fast32_t duk__dec_decode_hex_escape(duk_json_dec_ctx *js_ctx, duk_small_uint_t n); DUK_LOCAL_DECL void duk__dec_req_stridx(duk_json_dec_ctx *js_ctx, duk_small_uint_t stridx); DUK_LOCAL_DECL void duk__dec_string(duk_json_dec_ctx *js_ctx); #if defined(DUK_USE_JX) DUK_LOCAL_DECL void duk__dec_plain_string(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__dec_pointer(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__dec_buffer(duk_json_dec_ctx *js_ctx); #endif DUK_LOCAL_DECL void duk__dec_number(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__dec_objarr_entry(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__dec_objarr_exit(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__dec_object(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__dec_array(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__dec_value(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__dec_reviver_walk(duk_json_dec_ctx *js_ctx); DUK_LOCAL_DECL void duk__emit_1(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch); DUK_LOCAL_DECL void duk__emit_2(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch1, duk_uint_fast8_t ch2); DUK_LOCAL_DECL void duk__unemit_1(duk_json_enc_ctx *js_ctx); DUK_LOCAL_DECL void duk__emit_hstring(duk_json_enc_ctx *js_ctx, duk_hstring *h); #if defined(DUK_USE_FASTINT) DUK_LOCAL_DECL void duk__emit_cstring(duk_json_enc_ctx *js_ctx, const char *p); #endif DUK_LOCAL_DECL void duk__emit_stridx(duk_json_enc_ctx *js_ctx, duk_small_uint_t stridx); DUK_LOCAL_DECL duk_uint8_t *duk__emit_esc_auto_fast(duk_json_enc_ctx *js_ctx, duk_uint_fast32_t cp, duk_uint8_t *q); DUK_LOCAL_DECL void duk__enc_key_autoquote(duk_json_enc_ctx *js_ctx, duk_hstring *k); DUK_LOCAL_DECL void duk__enc_quote_string(duk_json_enc_ctx *js_ctx, duk_hstring *h_str); DUK_LOCAL_DECL void duk__enc_objarr_entry(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top); DUK_LOCAL_DECL void duk__enc_objarr_exit(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top); DUK_LOCAL_DECL void duk__enc_object(duk_json_enc_ctx *js_ctx); DUK_LOCAL_DECL void duk__enc_array(duk_json_enc_ctx *js_ctx); DUK_LOCAL_DECL duk_bool_t duk__enc_value(duk_json_enc_ctx *js_ctx, duk_idx_t idx_holder); DUK_LOCAL_DECL duk_bool_t duk__enc_allow_into_proplist(duk_tval *tv); DUK_LOCAL_DECL void duk__enc_double(duk_json_enc_ctx *js_ctx); #if defined(DUK_USE_FASTINT) DUK_LOCAL_DECL void duk__enc_fastint_tval(duk_json_enc_ctx *js_ctx, duk_tval *tv); #endif #if defined(DUK_USE_JX) || defined(DUK_USE_JC) DUK_LOCAL_DECL void duk__enc_buffer_jx_jc(duk_json_enc_ctx *js_ctx, duk_hbuffer *h); DUK_LOCAL_DECL void duk__enc_pointer(duk_json_enc_ctx *js_ctx, void *ptr); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_LOCAL_DECL void duk__enc_bufobj(duk_json_enc_ctx *js_ctx, duk_hbufobj *h_bufobj); #endif #endif #if defined(DUK_USE_JSON_STRINGIFY_FASTPATH) DUK_LOCAL_DECL void duk__enc_buffer_json_fastpath(duk_json_enc_ctx *js_ctx, duk_hbuffer *h); #endif DUK_LOCAL_DECL void duk__enc_newline_indent(duk_json_enc_ctx *js_ctx, duk_uint_t depth); /* * Helper tables */ #if defined(DUK_USE_JSON_QUOTESTRING_FASTPATH) DUK_LOCAL const duk_uint8_t duk__json_quotestr_lookup[256] = { /* 0x00 ... 0x7f: as is * 0x80: escape generically * 0x81: slow path * 0xa0 ... 0xff: backslash + one char */ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0xe2, 0xf4, 0xee, 0x80, 0xe6, 0xf2, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x20, 0x21, 0xa2, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0xdc, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81 }; #else /* DUK_USE_JSON_QUOTESTRING_FASTPATH */ DUK_LOCAL const duk_uint8_t duk__json_quotestr_esc[14] = { DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_LC_B, DUK_ASC_LC_T, DUK_ASC_LC_N, DUK_ASC_NUL, DUK_ASC_LC_F, DUK_ASC_LC_R }; #endif /* DUK_USE_JSON_QUOTESTRING_FASTPATH */ #if defined(DUK_USE_JSON_DECSTRING_FASTPATH) DUK_LOCAL const duk_uint8_t duk__json_decstr_lookup[256] = { /* 0x00: slow path * other: as is */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x21, 0x00, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x00, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff }; #endif /* DUK_USE_JSON_DECSTRING_FASTPATH */ #if defined(DUK_USE_JSON_EATWHITE_FASTPATH) DUK_LOCAL const duk_uint8_t duk__json_eatwhite_lookup[256] = { /* 0x00: finish (non-white) * 0x01: continue */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; #endif /* DUK_USE_JSON_EATWHITE_FASTPATH */ #if defined(DUK_USE_JSON_DECNUMBER_FASTPATH) DUK_LOCAL const duk_uint8_t duk__json_decnumber_lookup[256] = { /* 0x00: finish (not part of number) * 0x01: continue */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x01, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; #endif /* DUK_USE_JSON_DECNUMBER_FASTPATH */ /* * Parsing implementation. * * JSON lexer is now separate from duk_lexer.c because there are numerous * small differences making it difficult to share the lexer. * * The parser here works with raw bytes directly; this works because all * JSON delimiters are ASCII characters. Invalid xUTF-8 encoded values * inside strings will be passed on without normalization; this is not a * compliance concern because compliant inputs will always be valid * CESU-8 encodings. */ DUK_LOCAL void duk__dec_syntax_error(duk_json_dec_ctx *js_ctx) { /* Shared handler to minimize parser size. Cause will be * hidden, unfortunately, but we'll have an offset which * is often quite enough. */ DUK_ERROR_FMT1(js_ctx->thr, DUK_ERR_SYNTAX_ERROR, DUK_STR_FMT_INVALID_JSON, (long) (js_ctx->p - js_ctx->p_start)); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__dec_eat_white(duk_json_dec_ctx *js_ctx) { const duk_uint8_t *p; duk_uint8_t t; p = js_ctx->p; for (;;) { DUK_ASSERT(p <= js_ctx->p_end); t = *p; #if defined(DUK_USE_JSON_EATWHITE_FASTPATH) /* This fast path is pretty marginal in practice. * XXX: candidate for removal. */ DUK_ASSERT(duk__json_eatwhite_lookup[0x00] == 0x00); /* end-of-input breaks */ if (duk__json_eatwhite_lookup[t] == 0) { break; } #else /* DUK_USE_JSON_EATWHITE_FASTPATH */ if (!(t == 0x20 || t == 0x0a || t == 0x0d || t == 0x09)) { /* NUL also comes here. Comparison order matters, 0x20 * is most common whitespace. */ break; } #endif /* DUK_USE_JSON_EATWHITE_FASTPATH */ p++; } js_ctx->p = p; } #if defined(DUK_USE_JX) DUK_LOCAL duk_uint8_t duk__dec_peek(duk_json_dec_ctx *js_ctx) { DUK_ASSERT(js_ctx->p <= js_ctx->p_end); return *js_ctx->p; } #endif DUK_LOCAL duk_uint8_t duk__dec_get(duk_json_dec_ctx *js_ctx) { DUK_ASSERT(js_ctx->p <= js_ctx->p_end); return *js_ctx->p++; } DUK_LOCAL duk_uint8_t duk__dec_get_nonwhite(duk_json_dec_ctx *js_ctx) { duk__dec_eat_white(js_ctx); return duk__dec_get(js_ctx); } /* For JX, expressing the whole unsigned 32-bit range matters. */ DUK_LOCAL duk_uint_fast32_t duk__dec_decode_hex_escape(duk_json_dec_ctx *js_ctx, duk_small_uint_t n) { duk_small_uint_t i; duk_uint_fast32_t res = 0; duk_uint8_t x; duk_small_int_t t; for (i = 0; i < n; i++) { /* XXX: share helper from lexer; duk_lexer.c / hexval(). */ x = duk__dec_get(js_ctx); DUK_DDD(DUK_DDDPRINT("decode_hex_escape: i=%ld, n=%ld, res=%ld, x=%ld", (long) i, (long) n, (long) res, (long) x)); /* x == 0x00 (EOF) causes syntax_error */ DUK_ASSERT(duk_hex_dectab[0] == -1); t = duk_hex_dectab[x & 0xff]; if (DUK_LIKELY(t >= 0)) { res = (res * 16) + (duk_uint_fast32_t) t; } else { /* catches EOF and invalid digits */ goto syntax_error; } } DUK_DDD(DUK_DDDPRINT("final hex decoded value: %ld", (long) res)); return res; syntax_error: duk__dec_syntax_error(js_ctx); DUK_UNREACHABLE(); return 0; } DUK_LOCAL void duk__dec_req_stridx(duk_json_dec_ctx *js_ctx, duk_small_uint_t stridx) { duk_hstring *h; const duk_uint8_t *p; duk_uint8_t x, y; /* First character has already been eaten and checked by the caller. * We can scan until a NUL in stridx string because no built-in strings * have internal NULs. */ DUK_ASSERT_STRIDX_VALID(stridx); h = DUK_HTHREAD_GET_STRING(js_ctx->thr, stridx); DUK_ASSERT(h != NULL); p = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h) + 1; DUK_ASSERT(*(js_ctx->p - 1) == *(p - 1)); /* first character has been matched */ for (;;) { x = *p; if (x == 0) { break; } y = duk__dec_get(js_ctx); if (x != y) { /* Catches EOF of JSON input. */ goto syntax_error; } p++; } return; syntax_error: duk__dec_syntax_error(js_ctx); DUK_UNREACHABLE(); } DUK_LOCAL duk_small_int_t duk__dec_string_escape(duk_json_dec_ctx *js_ctx, duk_uint8_t **ext_p) { duk_uint_fast32_t cp; /* EOF (-1) will be cast to an unsigned value first * and then re-cast for the switch. In any case, it * will match the default case (syntax error). */ cp = (duk_uint_fast32_t) duk__dec_get(js_ctx); switch (cp) { case DUK_ASC_BACKSLASH: break; case DUK_ASC_DOUBLEQUOTE: break; case DUK_ASC_SLASH: break; case DUK_ASC_LC_T: cp = 0x09; break; case DUK_ASC_LC_N: cp = 0x0a; break; case DUK_ASC_LC_R: cp = 0x0d; break; case DUK_ASC_LC_F: cp = 0x0c; break; case DUK_ASC_LC_B: cp = 0x08; break; case DUK_ASC_LC_U: { cp = duk__dec_decode_hex_escape(js_ctx, 4); break; } #if defined(DUK_USE_JX) case DUK_ASC_UC_U: { if (js_ctx->flag_ext_custom) { cp = duk__dec_decode_hex_escape(js_ctx, 8); } else { return 1; /* syntax error */ } break; } case DUK_ASC_LC_X: { if (js_ctx->flag_ext_custom) { cp = duk__dec_decode_hex_escape(js_ctx, 2); } else { return 1; /* syntax error */ } break; } #endif /* DUK_USE_JX */ default: /* catches EOF (0x00) */ return 1; /* syntax error */ } DUK_RAW_WRITE_XUTF8(*ext_p, cp); return 0; } DUK_LOCAL void duk__dec_string(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; duk_bufwriter_ctx bw_alloc; duk_bufwriter_ctx *bw; duk_uint8_t *q; /* '"' was eaten by caller */ /* Note that we currently parse -bytes-, not codepoints. * All non-ASCII extended UTF-8 will encode to bytes >= 0x80, * so they'll simply pass through (valid UTF-8 or not). */ bw = &bw_alloc; DUK_BW_INIT_PUSHBUF(js_ctx->thr, bw, DUK__JSON_DECSTR_BUFSIZE); q = DUK_BW_GET_PTR(js_ctx->thr, bw); #if defined(DUK_USE_JSON_DECSTRING_FASTPATH) for (;;) { duk_small_uint_t safe; duk_uint8_t b, x; const duk_uint8_t *p; /* Select a safe loop count where no output checks are * needed assuming we won't encounter escapes. Input * bound checks are not necessary as a NUL (guaranteed) * will cause a SyntaxError before we read out of bounds. */ safe = DUK__JSON_DECSTR_CHUNKSIZE; /* Ensure space for 1:1 output plus one escape. */ q = DUK_BW_ENSURE_RAW(js_ctx->thr, bw, safe + DUK_UNICODE_MAX_XUTF8_LENGTH, q); p = js_ctx->p; /* temp copy, write back for next loop */ for (;;) { if (safe == 0) { js_ctx->p = p; break; } safe--; /* End of input (NUL) goes through slow path and causes SyntaxError. */ DUK_ASSERT(duk__json_decstr_lookup[0] == 0x00); b = *p++; x = (duk_small_int_t) duk__json_decstr_lookup[b]; if (DUK_LIKELY(x != 0)) { /* Fast path, decode as is. */ *q++ = b; } else if (b == DUK_ASC_DOUBLEQUOTE) { js_ctx->p = p; goto found_quote; } else if (b == DUK_ASC_BACKSLASH) { /* We've ensured space for one escaped input; then * bail out and recheck (this makes escape handling * quite slow but it's uncommon). */ js_ctx->p = p; if (duk__dec_string_escape(js_ctx, &q) != 0) { goto syntax_error; } break; } else { js_ctx->p = p; goto syntax_error; } } } found_quote: #else /* DUK_USE_JSON_DECSTRING_FASTPATH */ for (;;) { duk_uint8_t x; q = DUK_BW_ENSURE_RAW(js_ctx->thr, bw, DUK_UNICODE_MAX_XUTF8_LENGTH, q); x = duk__dec_get(js_ctx); if (x == DUK_ASC_DOUBLEQUOTE) { break; } else if (x == DUK_ASC_BACKSLASH) { if (duk__dec_string_escape(js_ctx, &q) != 0) { goto syntax_error; } } else if (x < 0x20) { /* catches EOF (NUL) */ goto syntax_error; } else { *q++ = (duk_uint8_t) x; } } #endif /* DUK_USE_JSON_DECSTRING_FASTPATH */ DUK_BW_SETPTR_AND_COMPACT(js_ctx->thr, bw, q); (void) duk_buffer_to_string(thr, -1); /* Safe if input string is safe. */ /* [ ... str ] */ return; syntax_error: duk__dec_syntax_error(js_ctx); DUK_UNREACHABLE(); } #if defined(DUK_USE_JX) /* Decode a plain string consisting entirely of identifier characters. * Used to parse plain keys (e.g. "foo: 123"). */ DUK_LOCAL void duk__dec_plain_string(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; const duk_uint8_t *p; duk_small_int_t x; /* Caller has already eaten the first char so backtrack one byte. */ js_ctx->p--; /* safe */ p = js_ctx->p; /* Here again we parse bytes, and non-ASCII UTF-8 will cause end of * parsing (which is correct except if there are non-shortest encodings). * There is also no need to check explicitly for end of input buffer as * the input is NUL padded and NUL will exit the parsing loop. * * Because no unescaping takes place, we can just scan to the end of the * plain string and intern from the input buffer. */ for (;;) { x = *p; /* There is no need to check the first character specially here * (i.e. reject digits): the caller only accepts valid initial * characters and won't call us if the first character is a digit. * This also ensures that the plain string won't be empty. */ if (!duk_unicode_is_identifier_part((duk_codepoint_t) x)) { break; } p++; } duk_push_lstring(thr, (const char *) js_ctx->p, (duk_size_t) (p - js_ctx->p)); js_ctx->p = p; /* [ ... str ] */ } #endif /* DUK_USE_JX */ #if defined(DUK_USE_JX) DUK_LOCAL void duk__dec_pointer(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; const duk_uint8_t *p; duk_small_int_t x; void *voidptr; /* Caller has already eaten the first character ('(') which we don't need. */ p = js_ctx->p; for (;;) { x = *p; /* Assume that the native representation never contains a closing * parenthesis. */ if (x == DUK_ASC_RPAREN) { break; } else if (x <= 0) { /* NUL term or -1 (EOF), NUL check would suffice */ goto syntax_error; } p++; } /* There is no need to NUL delimit the sscanf() call: trailing garbage is * ignored and there is always a NUL terminator which will force an error * if no error is encountered before it. It's possible that the scan * would scan further than between [js_ctx->p,p[ though and we'd advance * by less than the scanned value. * * Because pointers are platform specific, a failure to scan a pointer * results in a null pointer which is a better placeholder than a missing * value or an error. */ voidptr = NULL; (void) DUK_SSCANF((const char *) js_ctx->p, DUK_STR_FMT_PTR, &voidptr); duk_push_pointer(thr, voidptr); js_ctx->p = p + 1; /* skip ')' */ /* [ ... ptr ] */ return; syntax_error: duk__dec_syntax_error(js_ctx); DUK_UNREACHABLE(); } #endif /* DUK_USE_JX */ #if defined(DUK_USE_JX) DUK_LOCAL void duk__dec_buffer(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; const duk_uint8_t *p; duk_uint8_t *buf; duk_size_t src_len; duk_small_int_t x; /* Caller has already eaten the first character ('|') which we don't need. */ p = js_ctx->p; /* XXX: Would be nice to share the fast path loop from duk_hex_decode() * and avoid creating a temporary buffer. However, there are some * differences which prevent trivial sharing: * * - Pipe char detection * - EOF detection * - Unknown length of input and output * * The best approach here would be a bufwriter and a reasonaly sized * safe inner loop (e.g. 64 output bytes at a time). */ for (;;) { x = *p; /* This loop intentionally does not ensure characters are valid * ([0-9a-fA-F]) because the hex decode call below will do that. */ if (x == DUK_ASC_PIPE) { break; } else if (x <= 0) { /* NUL term or -1 (EOF), NUL check would suffice */ goto syntax_error; } p++; } /* XXX: this is not very nice; unnecessary copy is made. */ src_len = (duk_size_t) (p - js_ctx->p); buf = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, src_len); DUK_ASSERT(buf != NULL); duk_memcpy((void *) buf, (const void *) js_ctx->p, src_len); duk_hex_decode(thr, -1); js_ctx->p = p + 1; /* skip '|' */ /* [ ... buf ] */ return; syntax_error: duk__dec_syntax_error(js_ctx); DUK_UNREACHABLE(); } #endif /* DUK_USE_JX */ /* Parse a number, other than NaN or +/- Infinity */ DUK_LOCAL void duk__dec_number(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; const duk_uint8_t *p_start; const duk_uint8_t *p; duk_uint8_t x; duk_small_uint_t s2n_flags; DUK_DDD(DUK_DDDPRINT("parse_number")); p_start = js_ctx->p; /* First pass parse is very lenient (e.g. allows '1.2.3') and extracts a * string for strict number parsing. */ p = js_ctx->p; for (;;) { x = *p; DUK_DDD(DUK_DDDPRINT("parse_number: p_start=%p, p=%p, p_end=%p, x=%ld", (const void *) p_start, (const void *) p, (const void *) js_ctx->p_end, (long) x)); #if defined(DUK_USE_JSON_DECNUMBER_FASTPATH) /* This fast path is pretty marginal in practice. * XXX: candidate for removal. */ DUK_ASSERT(duk__json_decnumber_lookup[0x00] == 0x00); /* end-of-input breaks */ if (duk__json_decnumber_lookup[x] == 0) { break; } #else /* DUK_USE_JSON_DECNUMBER_FASTPATH */ if (!((x >= DUK_ASC_0 && x <= DUK_ASC_9) || (x == DUK_ASC_PERIOD || x == DUK_ASC_LC_E || x == DUK_ASC_UC_E || x == DUK_ASC_MINUS || x == DUK_ASC_PLUS))) { /* Plus sign must be accepted for positive exponents * (e.g. '1.5e+2'). This clause catches NULs. */ break; } #endif /* DUK_USE_JSON_DECNUMBER_FASTPATH */ p++; /* safe, because matched (NUL causes a break) */ } js_ctx->p = p; DUK_ASSERT(js_ctx->p > p_start); duk_push_lstring(thr, (const char *) p_start, (duk_size_t) (p - p_start)); s2n_flags = DUK_S2N_FLAG_ALLOW_EXP | DUK_S2N_FLAG_ALLOW_MINUS | /* but don't allow leading plus */ DUK_S2N_FLAG_ALLOW_FRAC; DUK_DDD(DUK_DDDPRINT("parse_number: string before parsing: %!T", (duk_tval *) duk_get_tval(thr, -1))); duk_numconv_parse(thr, 10 /*radix*/, s2n_flags); if (duk_is_nan(thr, -1)) { duk__dec_syntax_error(js_ctx); } DUK_ASSERT(duk_is_number(thr, -1)); DUK_DDD(DUK_DDDPRINT("parse_number: final number: %!T", (duk_tval *) duk_get_tval(thr, -1))); /* [ ... num ] */ } DUK_LOCAL void duk__dec_objarr_entry(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; duk_require_stack(thr, DUK_JSON_DEC_REQSTACK); /* c recursion check */ DUK_ASSERT_DISABLE(js_ctx->recursion_depth >= 0); /* unsigned */ DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit); if (js_ctx->recursion_depth >= js_ctx->recursion_limit) { DUK_ERROR_RANGE(thr, DUK_STR_JSONDEC_RECLIMIT); DUK_WO_NORETURN(return;); } js_ctx->recursion_depth++; } DUK_LOCAL void duk__dec_objarr_exit(duk_json_dec_ctx *js_ctx) { /* c recursion check */ DUK_ASSERT(js_ctx->recursion_depth > 0); DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit); js_ctx->recursion_depth--; } DUK_LOCAL void duk__dec_object(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; duk_int_t key_count; /* XXX: a "first" flag would suffice */ duk_uint8_t x; DUK_DDD(DUK_DDDPRINT("parse_object")); duk__dec_objarr_entry(js_ctx); duk_push_object(thr); /* Initial '{' has been checked and eaten by caller. */ key_count = 0; for (;;) { x = duk__dec_get_nonwhite(js_ctx); DUK_DDD(DUK_DDDPRINT("parse_object: obj=%!T, x=%ld, key_count=%ld", (duk_tval *) duk_get_tval(thr, -1), (long) x, (long) key_count)); /* handle comma and closing brace */ if (x == DUK_ASC_COMMA && key_count > 0) { /* accept comma, expect new value */ x = duk__dec_get_nonwhite(js_ctx); } else if (x == DUK_ASC_RCURLY) { /* eat closing brace */ break; } else if (key_count == 0) { /* accept anything, expect first value (EOF will be * caught by key parsing below. */ ; } else { /* catches EOF (NUL) and initial comma */ goto syntax_error; } /* parse key and value */ if (x == DUK_ASC_DOUBLEQUOTE) { duk__dec_string(js_ctx); #if defined(DUK_USE_JX) } else if (js_ctx->flag_ext_custom && duk_unicode_is_identifier_start((duk_codepoint_t) x)) { duk__dec_plain_string(js_ctx); #endif } else { goto syntax_error; } /* [ ... obj key ] */ x = duk__dec_get_nonwhite(js_ctx); if (x != DUK_ASC_COLON) { goto syntax_error; } duk__dec_value(js_ctx); /* [ ... obj key val ] */ duk_xdef_prop_wec(thr, -3); /* [ ... obj ] */ key_count++; } /* [ ... obj ] */ DUK_DDD(DUK_DDDPRINT("parse_object: final object is %!T", (duk_tval *) duk_get_tval(thr, -1))); duk__dec_objarr_exit(js_ctx); return; syntax_error: duk__dec_syntax_error(js_ctx); DUK_UNREACHABLE(); } DUK_LOCAL void duk__dec_array(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; duk_uarridx_t arr_idx; duk_uint8_t x; DUK_DDD(DUK_DDDPRINT("parse_array")); duk__dec_objarr_entry(js_ctx); duk_push_array(thr); /* Initial '[' has been checked and eaten by caller. */ arr_idx = 0; for (;;) { x = duk__dec_get_nonwhite(js_ctx); DUK_DDD(DUK_DDDPRINT("parse_array: arr=%!T, x=%ld, arr_idx=%ld", (duk_tval *) duk_get_tval(thr, -1), (long) x, (long) arr_idx)); /* handle comma and closing bracket */ if ((x == DUK_ASC_COMMA) && (arr_idx != 0)) { /* accept comma, expect new value */ ; } else if (x == DUK_ASC_RBRACKET) { /* eat closing bracket */ break; } else if (arr_idx == 0) { /* accept anything, expect first value (EOF will be * caught by duk__dec_value() below. */ js_ctx->p--; /* backtrack (safe) */ } else { /* catches EOF (NUL) and initial comma */ goto syntax_error; } /* parse value */ duk__dec_value(js_ctx); /* [ ... arr val ] */ duk_xdef_prop_index_wec(thr, -2, arr_idx); arr_idx++; } /* Must set 'length' explicitly when using duk_xdef_prop_xxx() to * set the values. */ duk_set_length(thr, -1, arr_idx); /* [ ... arr ] */ DUK_DDD(DUK_DDDPRINT("parse_array: final array is %!T", (duk_tval *) duk_get_tval(thr, -1))); duk__dec_objarr_exit(js_ctx); return; syntax_error: duk__dec_syntax_error(js_ctx); DUK_UNREACHABLE(); } DUK_LOCAL void duk__dec_value(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; duk_uint8_t x; x = duk__dec_get_nonwhite(js_ctx); DUK_DDD(DUK_DDDPRINT("parse_value: initial x=%ld", (long) x)); /* Note: duk__dec_req_stridx() backtracks one char */ if (x == DUK_ASC_DOUBLEQUOTE) { duk__dec_string(js_ctx); } else if ((x >= DUK_ASC_0 && x <= DUK_ASC_9) || (x == DUK_ASC_MINUS)) { #if defined(DUK_USE_JX) if (js_ctx->flag_ext_custom && x == DUK_ASC_MINUS && duk__dec_peek(js_ctx) == DUK_ASC_UC_I) { duk__dec_req_stridx(js_ctx, DUK_STRIDX_MINUS_INFINITY); /* "-Infinity", '-' has been eaten */ duk_push_number(thr, -DUK_DOUBLE_INFINITY); } else { #else { /* unconditional block */ #endif /* We already ate 'x', so backup one byte. */ js_ctx->p--; /* safe */ duk__dec_number(js_ctx); } } else if (x == DUK_ASC_LC_T) { duk__dec_req_stridx(js_ctx, DUK_STRIDX_TRUE); duk_push_true(thr); } else if (x == DUK_ASC_LC_F) { duk__dec_req_stridx(js_ctx, DUK_STRIDX_FALSE); duk_push_false(thr); } else if (x == DUK_ASC_LC_N) { duk__dec_req_stridx(js_ctx, DUK_STRIDX_LC_NULL); duk_push_null(thr); #if defined(DUK_USE_JX) } else if (js_ctx->flag_ext_custom && x == DUK_ASC_LC_U) { duk__dec_req_stridx(js_ctx, DUK_STRIDX_LC_UNDEFINED); duk_push_undefined(thr); } else if (js_ctx->flag_ext_custom && x == DUK_ASC_UC_N) { duk__dec_req_stridx(js_ctx, DUK_STRIDX_NAN); duk_push_nan(thr); } else if (js_ctx->flag_ext_custom && x == DUK_ASC_UC_I) { duk__dec_req_stridx(js_ctx, DUK_STRIDX_INFINITY); duk_push_number(thr, DUK_DOUBLE_INFINITY); } else if (js_ctx->flag_ext_custom && x == DUK_ASC_LPAREN) { duk__dec_pointer(js_ctx); } else if (js_ctx->flag_ext_custom && x == DUK_ASC_PIPE) { duk__dec_buffer(js_ctx); #endif } else if (x == DUK_ASC_LCURLY) { duk__dec_object(js_ctx); } else if (x == DUK_ASC_LBRACKET) { duk__dec_array(js_ctx); } else { /* catches EOF (NUL) */ goto syntax_error; } duk__dec_eat_white(js_ctx); /* [ ... val ] */ return; syntax_error: duk__dec_syntax_error(js_ctx); DUK_UNREACHABLE(); } /* Recursive value reviver, implements the Walk() algorithm. No C recursion * check is done here because the initial parsing step will already ensure * there is a reasonable limit on C recursion depth and hence object depth. */ DUK_LOCAL void duk__dec_reviver_walk(duk_json_dec_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; duk_hobject *h; duk_uarridx_t i, arr_len; DUK_DDD(DUK_DDDPRINT("walk: top=%ld, holder=%!T, name=%!T", (long) duk_get_top(thr), (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); duk_dup_top(thr); duk_get_prop(thr, -3); /* -> [ ... holder name val ] */ h = duk_get_hobject(thr, -1); if (h != NULL) { if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY) { arr_len = (duk_uarridx_t) duk_get_length(thr, -1); for (i = 0; i < arr_len; i++) { /* [ ... holder name val ] */ DUK_DDD(DUK_DDDPRINT("walk: array, top=%ld, i=%ld, arr_len=%ld, holder=%!T, name=%!T, val=%!T", (long) duk_get_top(thr), (long) i, (long) arr_len, (duk_tval *) duk_get_tval(thr, -3), (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); duk_dup_top(thr); (void) duk_push_uint_to_hstring(thr, (duk_uint_t) i); /* -> [ ... holder name val val ToString(i) ] */ duk__dec_reviver_walk(js_ctx); /* -> [ ... holder name val new_elem ] */ if (duk_is_undefined(thr, -1)) { duk_pop(thr); duk_del_prop_index(thr, -1, i); } else { /* XXX: duk_xdef_prop_index_wec() would be more appropriate * here but it currently makes some assumptions that might * not hold (e.g. that previous property is not an accessor). */ duk_put_prop_index(thr, -2, i); } } } else { /* [ ... holder name val ] */ duk_enum(thr, -1, DUK_ENUM_OWN_PROPERTIES_ONLY /*flags*/); while (duk_next(thr, -1 /*enum_index*/, 0 /*get_value*/)) { DUK_DDD(DUK_DDDPRINT("walk: object, top=%ld, holder=%!T, name=%!T, val=%!T, enum=%!iT, obj_key=%!T", (long) duk_get_top(thr), (duk_tval *) duk_get_tval(thr, -5), (duk_tval *) duk_get_tval(thr, -4), (duk_tval *) duk_get_tval(thr, -3), (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); /* [ ... holder name val enum obj_key ] */ duk_dup_m3(thr); duk_dup_m2(thr); /* [ ... holder name val enum obj_key val obj_key ] */ duk__dec_reviver_walk(js_ctx); /* [ ... holder name val enum obj_key new_elem ] */ if (duk_is_undefined(thr, -1)) { duk_pop(thr); duk_del_prop(thr, -3); } else { /* XXX: duk_xdef_prop_index_wec() would be more appropriate * here but it currently makes some assumptions that might * not hold (e.g. that previous property is not an accessor). * * Using duk_put_prop() works incorrectly with '__proto__' * if the own property with that name has been deleted. This * does not happen normally, but a clever reviver can trigger * that, see complex reviver case in: test-bug-json-parse-__proto__.js. */ duk_put_prop(thr, -4); } } duk_pop(thr); /* pop enum */ } } /* [ ... holder name val ] */ duk_dup(thr, js_ctx->idx_reviver); duk_insert(thr, -4); /* -> [ ... reviver holder name val ] */ duk_call_method(thr, 2); /* -> [ ... res ] */ DUK_DDD(DUK_DDDPRINT("walk: top=%ld, result=%!T", (long) duk_get_top(thr), (duk_tval *) duk_get_tval(thr, -1))); } /* * Stringify implementation. */ #define DUK__EMIT_1(js_ctx,ch) duk__emit_1((js_ctx), (duk_uint_fast8_t) (ch)) #define DUK__EMIT_2(js_ctx,ch1,ch2) duk__emit_2((js_ctx), (duk_uint_fast8_t) (ch1), (duk_uint_fast8_t) (ch2)) #define DUK__EMIT_HSTR(js_ctx,h) duk__emit_hstring((js_ctx), (h)) #if defined(DUK_USE_FASTINT) || defined(DUK_USE_JX) || defined(DUK_USE_JC) #define DUK__EMIT_CSTR(js_ctx,p) duk__emit_cstring((js_ctx), (p)) #endif #define DUK__EMIT_STRIDX(js_ctx,i) duk__emit_stridx((js_ctx), (i)) #define DUK__UNEMIT_1(js_ctx) duk__unemit_1((js_ctx)) DUK_LOCAL void duk__emit_1(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch) { DUK_BW_WRITE_ENSURE_U8(js_ctx->thr, &js_ctx->bw, ch); } DUK_LOCAL void duk__emit_2(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch1, duk_uint_fast8_t ch2) { DUK_BW_WRITE_ENSURE_U8_2(js_ctx->thr, &js_ctx->bw, ch1, ch2); } DUK_LOCAL void duk__emit_hstring(duk_json_enc_ctx *js_ctx, duk_hstring *h) { DUK_BW_WRITE_ENSURE_HSTRING(js_ctx->thr, &js_ctx->bw, h); } #if defined(DUK_USE_FASTINT) || defined(DUK_USE_JX) || defined(DUK_USE_JC) DUK_LOCAL void duk__emit_cstring(duk_json_enc_ctx *js_ctx, const char *str) { DUK_BW_WRITE_ENSURE_CSTRING(js_ctx->thr, &js_ctx->bw, str); } #endif DUK_LOCAL void duk__emit_stridx(duk_json_enc_ctx *js_ctx, duk_small_uint_t stridx) { duk_hstring *h; DUK_ASSERT_STRIDX_VALID(stridx); h = DUK_HTHREAD_GET_STRING(js_ctx->thr, stridx); DUK_ASSERT(h != NULL); DUK_BW_WRITE_ENSURE_HSTRING(js_ctx->thr, &js_ctx->bw, h); } DUK_LOCAL void duk__unemit_1(duk_json_enc_ctx *js_ctx) { DUK_ASSERT(DUK_BW_GET_SIZE(js_ctx->thr, &js_ctx->bw) >= 1); DUK_BW_ADD_PTR(js_ctx->thr, &js_ctx->bw, -1); } #define DUK__MKESC(nybbles,esc1,esc2) \ (((duk_uint_fast32_t) (nybbles)) << 16) | \ (((duk_uint_fast32_t) (esc1)) << 8) | \ ((duk_uint_fast32_t) (esc2)) DUK_LOCAL duk_uint8_t *duk__emit_esc_auto_fast(duk_json_enc_ctx *js_ctx, duk_uint_fast32_t cp, duk_uint8_t *q) { duk_uint_fast32_t tmp; duk_small_uint_t dig; DUK_UNREF(js_ctx); /* Caller ensures space for at least DUK__JSON_MAX_ESC_LEN. */ /* Select appropriate escape format automatically, and set 'tmp' to a * value encoding both the escape format character and the nybble count: * * (nybble_count << 16) | (escape_char1) | (escape_char2) */ #if defined(DUK_USE_JX) if (DUK_LIKELY(cp < 0x100UL)) { if (DUK_UNLIKELY(js_ctx->flag_ext_custom != 0U)) { tmp = DUK__MKESC(2, DUK_ASC_BACKSLASH, DUK_ASC_LC_X); } else { tmp = DUK__MKESC(4, DUK_ASC_BACKSLASH, DUK_ASC_LC_U); } } else #endif if (DUK_LIKELY(cp < 0x10000UL)) { tmp = DUK__MKESC(4, DUK_ASC_BACKSLASH, DUK_ASC_LC_U); } else { #if defined(DUK_USE_JX) if (DUK_LIKELY(js_ctx->flag_ext_custom != 0U)) { tmp = DUK__MKESC(8, DUK_ASC_BACKSLASH, DUK_ASC_UC_U); } else #endif { /* In compatible mode and standard JSON mode, output * something useful for non-BMP characters. This won't * roundtrip but will still be more or less readable and * more useful than an error. */ tmp = DUK__MKESC(8, DUK_ASC_UC_U, DUK_ASC_PLUS); } } *q++ = (duk_uint8_t) ((tmp >> 8) & 0xff); *q++ = (duk_uint8_t) (tmp & 0xff); tmp = tmp >> 16; while (tmp > 0) { tmp--; dig = (duk_small_uint_t) ((cp >> (4 * tmp)) & 0x0f); *q++ = duk_lc_digits[dig]; } return q; } DUK_LOCAL void duk__enc_key_autoquote(duk_json_enc_ctx *js_ctx, duk_hstring *k) { const duk_int8_t *p, *p_start, *p_end; /* Note: intentionally signed. */ duk_size_t k_len; duk_codepoint_t cp; DUK_ASSERT(k != NULL); /* Accept ASCII strings which conform to identifier requirements * as being emitted without key quotes. Since we only accept ASCII * there's no need for actual decoding: 'p' is intentionally signed * so that bytes >= 0x80 extend to negative values and are rejected * as invalid identifier codepoints. */ if (js_ctx->flag_avoid_key_quotes) { k_len = DUK_HSTRING_GET_BYTELEN(k); p_start = (const duk_int8_t *) DUK_HSTRING_GET_DATA(k); p_end = p_start + k_len; p = p_start; if (p == p_end) { /* Zero length string is not accepted without quotes */ goto quote_normally; } cp = (duk_codepoint_t) (*p++); if (DUK_UNLIKELY(!duk_unicode_is_identifier_start(cp))) { goto quote_normally; } while (p < p_end) { cp = (duk_codepoint_t) (*p++); if (DUK_UNLIKELY(!duk_unicode_is_identifier_part(cp))) { goto quote_normally; } } /* This seems faster than emitting bytes one at a time and * then potentially rewinding. */ DUK__EMIT_HSTR(js_ctx, k); return; } quote_normally: duk__enc_quote_string(js_ctx, k); } /* The Quote(value) operation: quote a string. * * Stack policy: [ ] -> [ ]. */ DUK_LOCAL void duk__enc_quote_string(duk_json_enc_ctx *js_ctx, duk_hstring *h_str) { duk_hthread *thr = js_ctx->thr; const duk_uint8_t *p, *p_start, *p_end, *p_now, *p_tmp; duk_uint8_t *q; duk_ucodepoint_t cp; /* typed for duk_unicode_decode_xutf8() */ DUK_DDD(DUK_DDDPRINT("duk__enc_quote_string: h_str=%!O", (duk_heaphdr *) h_str)); DUK_ASSERT(h_str != NULL); p_start = DUK_HSTRING_GET_DATA(h_str); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_str); p = p_start; DUK__EMIT_1(js_ctx, DUK_ASC_DOUBLEQUOTE); /* Encode string in small chunks, estimating the maximum expansion so that * there's no need to ensure space while processing the chunk. */ while (p < p_end) { duk_size_t left, now, space; left = (duk_size_t) (p_end - p); now = (left > DUK__JSON_ENCSTR_CHUNKSIZE ? DUK__JSON_ENCSTR_CHUNKSIZE : left); /* Maximum expansion per input byte is 6: * - invalid UTF-8 byte causes "\uXXXX" to be emitted (6/1 = 6). * - 2-byte UTF-8 encodes as "\uXXXX" (6/2 = 3). * - 4-byte UTF-8 encodes as "\Uxxxxxxxx" (10/4 = 2.5). */ space = now * 6; q = DUK_BW_ENSURE_GETPTR(thr, &js_ctx->bw, space); p_now = p + now; while (p < p_now) { #if defined(DUK_USE_JSON_QUOTESTRING_FASTPATH) duk_uint8_t b; b = duk__json_quotestr_lookup[*p++]; if (DUK_LIKELY(b < 0x80)) { /* Most input bytes go through here. */ *q++ = b; } else if (b >= 0xa0) { *q++ = DUK_ASC_BACKSLASH; *q++ = (duk_uint8_t) (b - 0x80); } else if (b == 0x80) { cp = (duk_ucodepoint_t) (*(p - 1)); q = duk__emit_esc_auto_fast(js_ctx, cp, q); } else if (b == 0x7f && js_ctx->flag_ascii_only) { /* 0x7F is special */ DUK_ASSERT(b == 0x81); cp = (duk_ucodepoint_t) 0x7f; q = duk__emit_esc_auto_fast(js_ctx, cp, q); } else { DUK_ASSERT(b == 0x81); p--; /* slow path is shared */ #else /* DUK_USE_JSON_QUOTESTRING_FASTPATH */ cp = *p; if (DUK_LIKELY(cp <= 0x7f)) { /* ascii fast path: avoid decoding utf-8 */ p++; if (cp == 0x22 || cp == 0x5c) { /* double quote or backslash */ *q++ = DUK_ASC_BACKSLASH; *q++ = (duk_uint8_t) cp; } else if (cp < 0x20) { duk_uint_fast8_t esc_char; /* This approach is a bit shorter than a straight * if-else-ladder and also a bit faster. */ if (cp < (sizeof(duk__json_quotestr_esc) / sizeof(duk_uint8_t)) && (esc_char = duk__json_quotestr_esc[cp]) != 0) { *q++ = DUK_ASC_BACKSLASH; *q++ = (duk_uint8_t) esc_char; } else { q = duk__emit_esc_auto_fast(js_ctx, cp, q); } } else if (cp == 0x7f && js_ctx->flag_ascii_only) { q = duk__emit_esc_auto_fast(js_ctx, cp, q); } else { /* any other printable -> as is */ *q++ = (duk_uint8_t) cp; } } else { /* slow path is shared */ #endif /* DUK_USE_JSON_QUOTESTRING_FASTPATH */ /* slow path decode */ /* If XUTF-8 decoding fails, treat the offending byte as a codepoint directly * and go forward one byte. This is of course very lossy, but allows some kind * of output to be produced even for internal strings which don't conform to * XUTF-8. All standard ECMAScript strings are always CESU-8, so this behavior * does not violate the ECMAScript specification. The behavior is applied to * all modes, including ECMAScript standard JSON. Because the current XUTF-8 * decoding is not very strict, this behavior only really affects initial bytes * and truncated codepoints. * * Another alternative would be to scan forwards to start of next codepoint * (or end of input) and emit just one replacement codepoint. */ p_tmp = p; if (!duk_unicode_decode_xutf8(thr, &p, p_start, p_end, &cp)) { /* Decode failed. */ cp = *p_tmp; p = p_tmp + 1; } #if defined(DUK_USE_NONSTD_JSON_ESC_U2028_U2029) if (js_ctx->flag_ascii_only || cp == 0x2028 || cp == 0x2029) { #else if (js_ctx->flag_ascii_only) { #endif q = duk__emit_esc_auto_fast(js_ctx, cp, q); } else { /* as is */ DUK_RAW_WRITE_XUTF8(q, cp); } } } DUK_BW_SET_PTR(thr, &js_ctx->bw, q); } DUK__EMIT_1(js_ctx, DUK_ASC_DOUBLEQUOTE); } /* Encode a double (checked by caller) from stack top. Stack top may be * replaced by serialized string but is not popped (caller does that). */ DUK_LOCAL void duk__enc_double(duk_json_enc_ctx *js_ctx) { duk_hthread *thr; duk_tval *tv; duk_double_t d; duk_small_int_t c; duk_small_int_t s; duk_small_uint_t stridx; duk_small_uint_t n2s_flags; duk_hstring *h_str; DUK_ASSERT(js_ctx != NULL); thr = js_ctx->thr; DUK_ASSERT(thr != NULL); /* Caller must ensure 'tv' is indeed a double and not a fastint! */ tv = DUK_GET_TVAL_NEGIDX(thr, -1); DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv)); d = DUK_TVAL_GET_DOUBLE(tv); c = (duk_small_int_t) DUK_FPCLASSIFY(d); s = (duk_small_int_t) DUK_SIGNBIT(d); DUK_UNREF(s); if (DUK_LIKELY(!(c == DUK_FP_INFINITE || c == DUK_FP_NAN))) { DUK_ASSERT(DUK_ISFINITE(d)); #if defined(DUK_USE_JX) || defined(DUK_USE_JC) /* Negative zero needs special handling in JX/JC because * it would otherwise serialize to '0', not '-0'. */ if (DUK_UNLIKELY(c == DUK_FP_ZERO && s != 0 && (js_ctx->flag_ext_custom_or_compatible))) { duk_push_hstring_stridx(thr, DUK_STRIDX_MINUS_ZERO); /* '-0' */ } else #endif /* DUK_USE_JX || DUK_USE_JC */ { n2s_flags = 0; /* [ ... number ] -> [ ... string ] */ duk_numconv_stringify(thr, 10 /*radix*/, 0 /*digits*/, n2s_flags); } h_str = duk_known_hstring(thr, -1); DUK__EMIT_HSTR(js_ctx, h_str); return; } #if defined(DUK_USE_JX) || defined(DUK_USE_JC) if (!(js_ctx->flags & (DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_EXT_COMPATIBLE))) { stridx = DUK_STRIDX_LC_NULL; } else if (c == DUK_FP_NAN) { stridx = js_ctx->stridx_custom_nan; } else if (s == 0) { stridx = js_ctx->stridx_custom_posinf; } else { stridx = js_ctx->stridx_custom_neginf; } #else stridx = DUK_STRIDX_LC_NULL; #endif DUK__EMIT_STRIDX(js_ctx, stridx); } #if defined(DUK_USE_FASTINT) /* Encode a fastint from duk_tval ptr, no value stack effects. */ DUK_LOCAL void duk__enc_fastint_tval(duk_json_enc_ctx *js_ctx, duk_tval *tv) { duk_int64_t v; /* Fastint range is signed 48-bit so longest value is -2^47 = -140737488355328 * (16 chars long), longest signed 64-bit value is -2^63 = -9223372036854775808 * (20 chars long). Alloc space for 64-bit range to be safe. */ duk_uint8_t buf[20 + 1]; /* Caller must ensure 'tv' is indeed a fastint! */ DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv)); v = DUK_TVAL_GET_FASTINT(tv); /* XXX: There are no format strings in duk_config.h yet, could add * one for formatting duk_int64_t. For now, assumes "%lld" and that * "long long" type exists. Could also rely on C99 directly but that * won't work for older MSVC. */ /*DUK_SPRINTF((char *) buf, "%lld", (long long) v);*/ DUK_SPRINTF((char *) buf, "%"PRIsizet, (size_t) v); DUK__EMIT_CSTR(js_ctx, (const char *) buf); } #endif #if defined(DUK_USE_JX) || defined(DUK_USE_JC) #if defined(DUK_USE_HEX_FASTPATH) DUK_LOCAL duk_uint8_t *duk__enc_buffer_data_hex(const duk_uint8_t *src, duk_size_t src_len, duk_uint8_t *dst) { duk_uint8_t *q; duk_uint16_t *q16; duk_small_uint_t x; duk_size_t i, len_safe; #if !defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE) duk_bool_t shift_dst; #endif /* Unlike in duk_hex_encode() 'dst' is not necessarily aligned by 2. * For platforms where unaligned accesses are not allowed, shift 'dst' * ahead by 1 byte to get alignment and then duk_memmove() the result * in place. The faster encoding loop makes up the difference. * There's always space for one extra byte because a terminator always * follows the hex data and that's been accounted for by the caller. */ #if defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE) q16 = (duk_uint16_t *) (void *) dst; #else shift_dst = (duk_bool_t) (((duk_size_t) dst) & 0x01U); if (shift_dst) { DUK_DD(DUK_DDPRINT("unaligned accesses not possible, dst not aligned -> step to dst + 1")); q16 = (duk_uint16_t *) (void *) (dst + 1); } else { DUK_DD(DUK_DDPRINT("unaligned accesses not possible, dst is aligned")); q16 = (duk_uint16_t *) (void *) dst; } DUK_ASSERT((((duk_size_t) q16) & 0x01U) == 0); #endif len_safe = src_len & ~0x03U; for (i = 0; i < len_safe; i += 4) { q16[0] = duk_hex_enctab[src[i]]; q16[1] = duk_hex_enctab[src[i + 1]]; q16[2] = duk_hex_enctab[src[i + 2]]; q16[3] = duk_hex_enctab[src[i + 3]]; q16 += 4; } q = (duk_uint8_t *) q16; #if !defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE) if (shift_dst) { q--; duk_memmove((void *) dst, (const void *) (dst + 1), 2 * len_safe); DUK_ASSERT(dst + 2 * len_safe == q); } #endif for (; i < src_len; i++) { x = src[i]; *q++ = duk_lc_digits[x >> 4]; *q++ = duk_lc_digits[x & 0x0f]; } return q; } #else /* DUK_USE_HEX_FASTPATH */ DUK_LOCAL duk_uint8_t *duk__enc_buffer_data_hex(const duk_uint8_t *src, duk_size_t src_len, duk_uint8_t *dst) { const duk_uint8_t *p; const duk_uint8_t *p_end; duk_uint8_t *q; duk_small_uint_t x; p = src; p_end = src + src_len; q = dst; while (p != p_end) { x = *p++; *q++ = duk_lc_digits[x >> 4]; *q++ = duk_lc_digits[x & 0x0f]; } return q; } #endif /* DUK_USE_HEX_FASTPATH */ DUK_LOCAL void duk__enc_buffer_data(duk_json_enc_ctx *js_ctx, duk_uint8_t *buf_data, duk_size_t buf_len) { duk_hthread *thr; duk_uint8_t *q; duk_size_t space; thr = js_ctx->thr; DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible); /* caller checks */ DUK_ASSERT(js_ctx->flag_ext_custom_or_compatible); /* Buffer values are encoded in (lowercase) hex to make the * binary data readable. Base64 or similar would be more * compact but less readable, and the point of JX/JC * variants is to be as useful to a programmer as possible. */ /* The #if defined() clutter here needs to handle the three * cases: (1) JX+JC, (2) JX only, (3) JC only. */ /* Note: space must cater for both JX and JC. */ space = 9 + buf_len * 2 + 2; DUK_ASSERT(DUK_HBUFFER_MAX_BYTELEN <= 0x7ffffffeUL); DUK_ASSERT((space - 2) / 2 >= buf_len); /* overflow not possible, buffer limits */ q = DUK_BW_ENSURE_GETPTR(thr, &js_ctx->bw, space); #if defined(DUK_USE_JX) && defined(DUK_USE_JC) if (js_ctx->flag_ext_custom) #endif #if defined(DUK_USE_JX) { *q++ = DUK_ASC_PIPE; q = duk__enc_buffer_data_hex(buf_data, buf_len, q); *q++ = DUK_ASC_PIPE; } #endif #if defined(DUK_USE_JX) && defined(DUK_USE_JC) else #endif #if defined(DUK_USE_JC) { DUK_ASSERT(js_ctx->flag_ext_compatible); duk_memcpy((void *) q, (const void *) "{\"_buf\":\"", 9); /* len: 9 */ q += 9; q = duk__enc_buffer_data_hex(buf_data, buf_len, q); *q++ = DUK_ASC_DOUBLEQUOTE; *q++ = DUK_ASC_RCURLY; } #endif DUK_BW_SET_PTR(thr, &js_ctx->bw, q); } DUK_LOCAL void duk__enc_buffer_jx_jc(duk_json_enc_ctx *js_ctx, duk_hbuffer *h) { duk__enc_buffer_data(js_ctx, (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(js_ctx->thr->heap, h), (duk_size_t) DUK_HBUFFER_GET_SIZE(h)); } #endif /* DUK_USE_JX || DUK_USE_JC */ #if defined(DUK_USE_JSON_STRINGIFY_FASTPATH) DUK_LOCAL void duk__enc_buffer_json_fastpath(duk_json_enc_ctx *js_ctx, duk_hbuffer *h) { duk_size_t i, n; const duk_uint8_t *buf; duk_uint8_t *q; n = DUK_HBUFFER_GET_SIZE(h); if (n == 0) { DUK__EMIT_2(js_ctx, DUK_ASC_LCURLY, DUK_ASC_RCURLY); return; } DUK__EMIT_1(js_ctx, DUK_ASC_LCURLY); /* Maximum encoded length with 32-bit index: 1 + 10 + 2 + 3 + 1 + 1 = 18, * with 64-bit index: 1 + 20 + 2 + 3 + 1 + 1 = 28. 32 has some slack. * * Note that because the output buffer is reallocated from time to time, * side effects (such as finalizers) affecting the buffer 'h' must be * disabled. This is the case in the JSON.stringify() fast path. */ buf = (const duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(js_ctx->thr->heap, h); if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { for (i = 0; i < n; i++) { duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth + 1); q = DUK_BW_ENSURE_GETPTR(js_ctx->thr, &js_ctx->bw, 32); q += DUK_SPRINTF((char *) q, "\"%lu\": %u,", (unsigned long) i, (unsigned int) buf[i]); DUK_BW_SET_PTR(js_ctx->thr, &js_ctx->bw, q); } } else { q = DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw); for (i = 0; i < n; i++) { q = DUK_BW_ENSURE_RAW(js_ctx->thr, &js_ctx->bw, 32, q); q += DUK_SPRINTF((char *) q, "\"%lu\":%u,", (unsigned long) i, (unsigned int) buf[i]); } DUK_BW_SET_PTR(js_ctx->thr, &js_ctx->bw, q); } DUK__UNEMIT_1(js_ctx); /* eat trailing comma */ if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth); } DUK__EMIT_1(js_ctx, DUK_ASC_RCURLY); } #endif /* DUK_USE_JSON_STRINGIFY_FASTPATH */ #if defined(DUK_USE_JX) || defined(DUK_USE_JC) DUK_LOCAL void duk__enc_pointer(duk_json_enc_ctx *js_ctx, void *ptr) { char buf[64]; /* XXX: how to figure correct size? */ const char *fmt; DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible); /* caller checks */ DUK_ASSERT(js_ctx->flag_ext_custom_or_compatible); duk_memzero(buf, sizeof(buf)); /* The #if defined() clutter here needs to handle the three * cases: (1) JX+JC, (2) JX only, (3) JC only. */ #if defined(DUK_USE_JX) && defined(DUK_USE_JC) if (js_ctx->flag_ext_custom) #endif #if defined(DUK_USE_JX) { fmt = ptr ? "(%p)" : "(null)"; } #endif #if defined(DUK_USE_JX) && defined(DUK_USE_JC) else #endif #if defined(DUK_USE_JC) { DUK_ASSERT(js_ctx->flag_ext_compatible); fmt = ptr ? "{\"_ptr\":\"%p\"}" : "{\"_ptr\":\"null\"}"; } #endif /* When ptr == NULL, the format argument is unused. */ DUK_SNPRINTF(buf, sizeof(buf) - 1, fmt, ptr); /* must not truncate */ DUK__EMIT_CSTR(js_ctx, buf); } #endif /* DUK_USE_JX || DUK_USE_JC */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) #if defined(DUK_USE_JX) || defined(DUK_USE_JC) DUK_LOCAL void duk__enc_bufobj(duk_json_enc_ctx *js_ctx, duk_hbufobj *h_bufobj) { DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); if (h_bufobj->buf == NULL || !DUK_HBUFOBJ_VALID_SLICE(h_bufobj)) { DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL); } else { /* Handle both full and partial slice (as long as covered). */ duk__enc_buffer_data(js_ctx, (duk_uint8_t *) DUK_HBUFOBJ_GET_SLICE_BASE(js_ctx->thr->heap, h_bufobj), (duk_size_t) h_bufobj->length); } } #endif /* DUK_USE_JX || DUK_USE_JC */ #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* Indent helper. Calling code relies on js_ctx->recursion_depth also being * directly related to indent depth. */ #if defined(DUK_USE_PREFER_SIZE) DUK_LOCAL void duk__enc_newline_indent(duk_json_enc_ctx *js_ctx, duk_uint_t depth) { DUK_ASSERT(js_ctx->h_gap != NULL); DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap) > 0); /* caller guarantees */ DUK__EMIT_1(js_ctx, 0x0a); while (depth-- > 0) { DUK__EMIT_HSTR(js_ctx, js_ctx->h_gap); } } #else /* DUK_USE_PREFER_SIZE */ DUK_LOCAL void duk__enc_newline_indent(duk_json_enc_ctx *js_ctx, duk_uint_t depth) { const duk_uint8_t *gap_data; duk_size_t gap_len; duk_size_t avail_bytes; /* bytes of indent available for copying */ duk_size_t need_bytes; /* bytes of indent still needed */ duk_uint8_t *p_start; duk_uint8_t *p; DUK_ASSERT(js_ctx->h_gap != NULL); DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap) > 0); /* caller guarantees */ DUK__EMIT_1(js_ctx, 0x0a); if (DUK_UNLIKELY(depth == 0)) { return; } /* To handle deeper indents efficiently, make use of copies we've * already emitted. In effect we can emit a sequence of 1, 2, 4, * 8, etc copies, and then finish the last run. Byte counters * avoid multiply with gap_len on every loop. */ gap_data = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(js_ctx->h_gap); gap_len = (duk_size_t) DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap); DUK_ASSERT(gap_len > 0); need_bytes = gap_len * depth; p = DUK_BW_ENSURE_GETPTR(js_ctx->thr, &js_ctx->bw, need_bytes); p_start = p; duk_memcpy((void *) p, (const void *) gap_data, (size_t) gap_len); p += gap_len; avail_bytes = gap_len; DUK_ASSERT(need_bytes >= gap_len); need_bytes -= gap_len; while (need_bytes >= avail_bytes) { duk_memcpy((void *) p, (const void *) p_start, (size_t) avail_bytes); p += avail_bytes; need_bytes -= avail_bytes; avail_bytes <<= 1; } DUK_ASSERT(need_bytes < avail_bytes); /* need_bytes may be zero */ duk_memcpy((void *) p, (const void *) p_start, (size_t) need_bytes); p += need_bytes; /*avail_bytes += need_bytes*/ DUK_BW_SET_PTR(js_ctx->thr, &js_ctx->bw, p); } #endif /* DUK_USE_PREFER_SIZE */ /* Shared entry handling for object/array serialization. */ DUK_LOCAL void duk__enc_objarr_entry(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top) { duk_hthread *thr = js_ctx->thr; duk_hobject *h_target; duk_uint_fast32_t i, n; *entry_top = duk_get_top(thr); duk_require_stack(thr, DUK_JSON_ENC_REQSTACK); /* Loop check using a hybrid approach: a fixed-size visited[] array * with overflow in a loop check object. */ h_target = duk_known_hobject(thr, -1); /* object or array */ n = js_ctx->recursion_depth; if (DUK_UNLIKELY(n > DUK_JSON_ENC_LOOPARRAY)) { n = DUK_JSON_ENC_LOOPARRAY; } for (i = 0; i < n; i++) { if (DUK_UNLIKELY(js_ctx->visiting[i] == h_target)) { DUK_DD(DUK_DDPRINT("slow path loop detect")); DUK_ERROR_TYPE(thr, DUK_STR_CYCLIC_INPUT); DUK_WO_NORETURN(return;); } } if (js_ctx->recursion_depth < DUK_JSON_ENC_LOOPARRAY) { js_ctx->visiting[js_ctx->recursion_depth] = h_target; } else { duk_push_sprintf(thr, DUK_STR_FMT_PTR, (void *) h_target); duk_dup_top(thr); /* -> [ ... voidp voidp ] */ if (duk_has_prop(thr, js_ctx->idx_loop)) { DUK_ERROR_TYPE(thr, DUK_STR_CYCLIC_INPUT); DUK_WO_NORETURN(return;); } duk_push_true(thr); /* -> [ ... voidp true ] */ duk_put_prop(thr, js_ctx->idx_loop); /* -> [ ... ] */ } /* C recursion check. */ DUK_ASSERT_DISABLE(js_ctx->recursion_depth >= 0); /* unsigned */ DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit); if (js_ctx->recursion_depth >= js_ctx->recursion_limit) { DUK_ERROR_RANGE(thr, DUK_STR_JSONENC_RECLIMIT); DUK_WO_NORETURN(return;); } js_ctx->recursion_depth++; DUK_DDD(DUK_DDDPRINT("shared entry finished: top=%ld, loop=%!T", (long) duk_get_top(thr), (duk_tval *) duk_get_tval(thr, js_ctx->idx_loop))); } /* Shared exit handling for object/array serialization. */ DUK_LOCAL void duk__enc_objarr_exit(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top) { duk_hthread *thr = js_ctx->thr; duk_hobject *h_target; /* C recursion check. */ DUK_ASSERT(js_ctx->recursion_depth > 0); DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit); js_ctx->recursion_depth--; /* Loop check. */ h_target = duk_known_hobject(thr, *entry_top - 1); /* original target at entry_top - 1 */ if (js_ctx->recursion_depth < DUK_JSON_ENC_LOOPARRAY) { /* Previous entry was inside visited[], nothing to do. */ } else { duk_push_sprintf(thr, DUK_STR_FMT_PTR, (void *) h_target); duk_del_prop(thr, js_ctx->idx_loop); /* -> [ ... ] */ } /* Restore stack top after unbalanced code paths. */ duk_set_top(thr, *entry_top); DUK_DDD(DUK_DDDPRINT("shared entry finished: top=%ld, loop=%!T", (long) duk_get_top(thr), (duk_tval *) duk_get_tval(thr, js_ctx->idx_loop))); } /* The JO(value) operation: encode object. * * Stack policy: [ object ] -> [ object ]. */ DUK_LOCAL void duk__enc_object(duk_json_enc_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; duk_hstring *h_key; duk_idx_t entry_top; duk_idx_t idx_obj; duk_idx_t idx_keys; duk_bool_t emitted; duk_uarridx_t arr_len, i; duk_size_t prev_size; DUK_DDD(DUK_DDDPRINT("duk__enc_object: obj=%!T", (duk_tval *) duk_get_tval(thr, -1))); duk__enc_objarr_entry(js_ctx, &entry_top); idx_obj = entry_top - 1; if (js_ctx->idx_proplist >= 0) { idx_keys = js_ctx->idx_proplist; } else { /* XXX: would be nice to enumerate an object at specified index */ duk_dup(thr, idx_obj); (void) duk_hobject_get_enumerated_keys(thr, DUK_ENUM_OWN_PROPERTIES_ONLY /*flags*/); /* [ ... target ] -> [ ... target keys ] */ idx_keys = duk_require_normalize_index(thr, -1); /* leave stack unbalanced on purpose */ } DUK_DDD(DUK_DDDPRINT("idx_keys=%ld, h_keys=%!T", (long) idx_keys, (duk_tval *) duk_get_tval(thr, idx_keys))); /* Steps 8-10 have been merged to avoid a "partial" variable. */ DUK__EMIT_1(js_ctx, DUK_ASC_LCURLY); /* XXX: keys is an internal object with all keys to be processed * in its (gapless) array part. Because nobody can touch the keys * object, we could iterate its array part directly (keeping in mind * that it can be reallocated). */ arr_len = (duk_uarridx_t) duk_get_length(thr, idx_keys); emitted = 0; for (i = 0; i < arr_len; i++) { duk_get_prop_index(thr, idx_keys, i); /* -> [ ... key ] */ DUK_DDD(DUK_DDDPRINT("object property loop: holder=%!T, key=%!T", (duk_tval *) duk_get_tval(thr, idx_obj), (duk_tval *) duk_get_tval(thr, -1))); h_key = duk_known_hstring(thr, -1); DUK_ASSERT(h_key != NULL); DUK_ASSERT(!DUK_HSTRING_HAS_SYMBOL(h_key)); /* proplist filtering; enum options */ prev_size = DUK_BW_GET_SIZE(js_ctx->thr, &js_ctx->bw); if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth); duk__enc_key_autoquote(js_ctx, h_key); DUK__EMIT_2(js_ctx, DUK_ASC_COLON, DUK_ASC_SPACE); } else { duk__enc_key_autoquote(js_ctx, h_key); DUK__EMIT_1(js_ctx, DUK_ASC_COLON); } /* [ ... key ] */ if (DUK_UNLIKELY(duk__enc_value(js_ctx, idx_obj) == 0)) { /* Value would yield 'undefined', so skip key altogether. * Side effects have already happened. */ DUK_BW_SET_SIZE(js_ctx->thr, &js_ctx->bw, prev_size); } else { DUK__EMIT_1(js_ctx, DUK_ASC_COMMA); emitted = 1; } /* [ ... ] */ } if (emitted) { DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA); DUK__UNEMIT_1(js_ctx); /* eat trailing comma */ if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { DUK_ASSERT(js_ctx->recursion_depth >= 1); duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1U); } } DUK__EMIT_1(js_ctx, DUK_ASC_RCURLY); duk__enc_objarr_exit(js_ctx, &entry_top); DUK_ASSERT_TOP(thr, entry_top); } /* The JA(value) operation: encode array. * * Stack policy: [ array ] -> [ array ]. */ DUK_LOCAL void duk__enc_array(duk_json_enc_ctx *js_ctx) { duk_hthread *thr = js_ctx->thr; duk_idx_t entry_top; duk_idx_t idx_arr; duk_bool_t emitted; duk_uarridx_t i, arr_len; DUK_DDD(DUK_DDDPRINT("duk__enc_array: array=%!T", (duk_tval *) duk_get_tval(thr, -1))); duk__enc_objarr_entry(js_ctx, &entry_top); idx_arr = entry_top - 1; /* Steps 8-10 have been merged to avoid a "partial" variable. */ DUK__EMIT_1(js_ctx, DUK_ASC_LBRACKET); arr_len = (duk_uarridx_t) duk_get_length(thr, idx_arr); emitted = 0; for (i = 0; i < arr_len; i++) { DUK_DDD(DUK_DDDPRINT("array entry loop: array=%!T, index=%ld, arr_len=%ld", (duk_tval *) duk_get_tval(thr, idx_arr), (long) i, (long) arr_len)); if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { DUK_ASSERT(js_ctx->recursion_depth >= 1); duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth); } (void) duk_push_uint_to_hstring(thr, (duk_uint_t) i); /* -> [ ... key ] */ /* [ ... key ] */ if (DUK_UNLIKELY(duk__enc_value(js_ctx, idx_arr) == 0)) { /* Value would normally be omitted, replace with 'null'. */ DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL); } else { ; } /* [ ... ] */ DUK__EMIT_1(js_ctx, DUK_ASC_COMMA); emitted = 1; } if (emitted) { DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA); DUK__UNEMIT_1(js_ctx); /* eat trailing comma */ if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { DUK_ASSERT(js_ctx->recursion_depth >= 1); duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1U); } } DUK__EMIT_1(js_ctx, DUK_ASC_RBRACKET); duk__enc_objarr_exit(js_ctx, &entry_top); DUK_ASSERT_TOP(thr, entry_top); } /* The Str(key, holder) operation. * * Stack policy: [ ... key ] -> [ ... ] */ DUK_LOCAL duk_bool_t duk__enc_value(duk_json_enc_ctx *js_ctx, duk_idx_t idx_holder) { duk_hthread *thr = js_ctx->thr; duk_tval *tv; duk_tval *tv_holder; duk_tval *tv_key; duk_small_int_t c; DUK_DDD(DUK_DDDPRINT("duk__enc_value: idx_holder=%ld, holder=%!T, key=%!T", (long) idx_holder, (duk_tval *) duk_get_tval(thr, idx_holder), (duk_tval *) duk_get_tval(thr, -1))); tv_holder = DUK_GET_TVAL_POSIDX(thr, idx_holder); DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv_holder)); tv_key = DUK_GET_TVAL_NEGIDX(thr, -1); DUK_ASSERT(DUK_TVAL_IS_STRING(tv_key)); DUK_ASSERT(!DUK_HSTRING_HAS_SYMBOL(DUK_TVAL_GET_STRING(tv_key))); /* Caller responsible. */ (void) duk_hobject_getprop(thr, tv_holder, tv_key); /* -> [ ... key val ] */ DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(thr, -1))); /* Standard JSON checks for .toJSON() only for actual objects; for * example, setting Number.prototype.toJSON and then serializing a * number won't invoke the .toJSON() method. However, lightfuncs and * plain buffers mimic objects so we check for their .toJSON() method. */ if (duk_check_type_mask(thr, -1, DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER)) { duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_TO_JSON); if (duk_is_callable(thr, -1)) { /* toJSON() can also be a lightfunc */ DUK_DDD(DUK_DDDPRINT("value is object, has callable toJSON() -> call it")); /* XXX: duk_dup_unvalidated(thr, -2) etc. */ duk_dup_m2(thr); /* -> [ ... key val toJSON val ] */ duk_dup_m4(thr); /* -> [ ... key val toJSON val key ] */ duk_call_method(thr, 1); /* -> [ ... key val val' ] */ duk_remove_m2(thr); /* -> [ ... key val' ] */ } else { duk_pop(thr); /* -> [ ... key val ] */ } } /* [ ... key val ] */ DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(thr, -1))); if (js_ctx->h_replacer) { /* XXX: Here a "slice copy" would be useful. */ DUK_DDD(DUK_DDDPRINT("replacer is set, call replacer")); duk_push_hobject(thr, js_ctx->h_replacer); /* -> [ ... key val replacer ] */ duk_dup(thr, idx_holder); /* -> [ ... key val replacer holder ] */ duk_dup_m4(thr); /* -> [ ... key val replacer holder key ] */ duk_dup_m4(thr); /* -> [ ... key val replacer holder key val ] */ duk_call_method(thr, 2); /* -> [ ... key val val' ] */ duk_remove_m2(thr); /* -> [ ... key val' ] */ } /* [ ... key val ] */ DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(thr, -1))); tv = DUK_GET_TVAL_NEGIDX(thr, -1); if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h; h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) #if defined(DUK_USE_JX) || defined(DUK_USE_JC) if (DUK_HOBJECT_IS_BUFOBJ(h) && js_ctx->flags & (DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_EXT_COMPATIBLE)) { /* With JX/JC a bufferobject gets serialized specially. */ duk_hbufobj *h_bufobj; h_bufobj = (duk_hbufobj *) h; DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); duk__enc_bufobj(js_ctx, h_bufobj); goto pop2_emitted; } /* Otherwise bufferobjects get serialized as normal objects. */ #endif /* JX || JC */ #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ c = (duk_small_int_t) DUK_HOBJECT_GET_CLASS_NUMBER(h); switch (c) { case DUK_HOBJECT_CLASS_NUMBER: { DUK_DDD(DUK_DDDPRINT("value is a Number object -> coerce with ToNumber()")); duk_to_number_m1(thr); /* The coercion potentially invokes user .valueOf() and .toString() * but can't result in a function value because ToPrimitive() would * reject such a result: test-dev-json-stringify-coercion-1.js. */ DUK_ASSERT(!duk_is_callable(thr, -1)); break; } case DUK_HOBJECT_CLASS_STRING: { DUK_DDD(DUK_DDDPRINT("value is a String object -> coerce with ToString()")); duk_to_string(thr, -1); /* Same coercion behavior as for Number. */ DUK_ASSERT(!duk_is_callable(thr, -1)); break; } #if defined(DUK_USE_JX) || defined(DUK_USE_JC) case DUK_HOBJECT_CLASS_POINTER: #endif case DUK_HOBJECT_CLASS_BOOLEAN: { DUK_DDD(DUK_DDDPRINT("value is a Boolean/Buffer/Pointer object -> get internal value")); duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_VALUE); duk_remove_m2(thr); break; } default: { /* Normal object which doesn't get automatically coerced to a * primitive value. Functions are checked for specially. The * primitive value coercions for Number, String, Pointer, and * Boolean can't result in functions so suffices to check here. * Symbol objects are handled like plain objects (their primitive * value is NOT looked up like for e.g. String objects). */ DUK_ASSERT(h != NULL); if (DUK_HOBJECT_IS_CALLABLE(h)) { #if defined(DUK_USE_JX) || defined(DUK_USE_JC) if (js_ctx->flags & (DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_EXT_COMPATIBLE)) { /* We only get here when doing non-standard JSON encoding */ DUK_DDD(DUK_DDDPRINT("-> function allowed, serialize to custom format")); DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible); DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_function); goto pop2_emitted; } else { DUK_DDD(DUK_DDDPRINT("-> will result in undefined (function)")); goto pop2_undef; } #else /* DUK_USE_JX || DUK_USE_JC */ DUK_DDD(DUK_DDDPRINT("-> will result in undefined (function)")); goto pop2_undef; #endif /* DUK_USE_JX || DUK_USE_JC */ } } } /* end switch */ } /* [ ... key val ] */ DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(thr, -1))); if (duk_check_type_mask(thr, -1, js_ctx->mask_for_undefined)) { /* will result in undefined */ DUK_DDD(DUK_DDDPRINT("-> will result in undefined (type mask check)")); goto pop2_undef; } tv = DUK_GET_TVAL_NEGIDX(thr, -1); switch (DUK_TVAL_GET_TAG(tv)) { #if defined(DUK_USE_JX) || defined(DUK_USE_JC) /* When JX/JC not in use, the type mask above will avoid this case if needed. */ case DUK_TAG_UNDEFINED: { DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_undefined); break; } #endif case DUK_TAG_NULL: { DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL); break; } case DUK_TAG_BOOLEAN: { DUK__EMIT_STRIDX(js_ctx, DUK_TVAL_GET_BOOLEAN(tv) ? DUK_STRIDX_TRUE : DUK_STRIDX_FALSE); break; } #if defined(DUK_USE_JX) || defined(DUK_USE_JC) /* When JX/JC not in use, the type mask above will avoid this case if needed. */ case DUK_TAG_POINTER: { duk__enc_pointer(js_ctx, DUK_TVAL_GET_POINTER(tv)); break; } #endif /* DUK_USE_JX || DUK_USE_JC */ case DUK_TAG_STRING: { duk_hstring *h = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h != NULL); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { goto pop2_undef; } duk__enc_quote_string(js_ctx, h); break; } case DUK_TAG_OBJECT: { duk_hobject *h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); /* Function values are handled completely above (including * coercion results): */ DUK_ASSERT(!DUK_HOBJECT_IS_CALLABLE(h)); if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY) { duk__enc_array(js_ctx); } else { duk__enc_object(js_ctx); } break; } /* Because plain buffers mimics Uint8Array, they have enumerable * index properties [0,byteLength[. Because JSON only serializes * enumerable own properties, no properties can be serialized for * plain buffers (all virtual properties are non-enumerable). However, * there may be a .toJSON() method which was already handled above. */ case DUK_TAG_BUFFER: { #if defined(DUK_USE_JX) || defined(DUK_USE_JC) if (js_ctx->flag_ext_custom_or_compatible) { duk__enc_buffer_jx_jc(js_ctx, DUK_TVAL_GET_BUFFER(tv)); break; } #endif /* Could implement a fastpath, but the fast path would need * to handle realloc side effects correctly. */ duk_to_object(thr, -1); duk__enc_object(js_ctx); break; } case DUK_TAG_LIGHTFUNC: { #if defined(DUK_USE_JX) || defined(DUK_USE_JC) /* We only get here when doing non-standard JSON encoding */ DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible); DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_function); #else /* Standard JSON omits functions */ DUK_UNREACHABLE(); #endif break; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: /* Number serialization has a significant impact relative to * other fast path code, so careful fast path for fastints. */ duk__enc_fastint_tval(js_ctx, tv); break; #endif default: { /* number */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); /* XXX: A fast path for usual integers would be useful when * fastint support is not enabled. */ duk__enc_double(js_ctx); break; } } #if defined(DUK_USE_JX) || defined(DUK_USE_JC) pop2_emitted: #endif duk_pop_2(thr); /* [ ... key val ] -> [ ... ] */ return 1; /* emitted */ pop2_undef: duk_pop_2(thr); /* [ ... key val ] -> [ ... ] */ return 0; /* not emitted */ } /* E5 Section 15.12.3, main algorithm, step 4.b.ii steps 1-4. */ DUK_LOCAL duk_bool_t duk__enc_allow_into_proplist(duk_tval *tv) { duk_small_int_t c; /* XXX: some kind of external internal type checker? * - type mask; symbol flag; class mask */ DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_STRING(tv)) { duk_hstring *h; h = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h != NULL); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { return 0; } return 1; } else if (DUK_TVAL_IS_NUMBER(tv)) { return 1; } else if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h; h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); c = (duk_small_int_t) DUK_HOBJECT_GET_CLASS_NUMBER(h); if (c == DUK_HOBJECT_CLASS_STRING || c == DUK_HOBJECT_CLASS_NUMBER) { return 1; } } return 0; } /* * JSON.stringify() fast path * * Otherwise supports full JSON, JX, and JC features, but bails out on any * possible side effect which might change the value being serialized. The * fast path can take advantage of the fact that the value being serialized * is unchanged so that we can walk directly through property tables etc. */ #if defined(DUK_USE_JSON_STRINGIFY_FASTPATH) DUK_LOCAL duk_bool_t duk__json_stringify_fast_value(duk_json_enc_ctx *js_ctx, duk_tval *tv) { duk_uint_fast32_t i, n; DUK_DDD(DUK_DDDPRINT("stringify fast: %!T", tv)); DUK_ASSERT(js_ctx != NULL); DUK_ASSERT(js_ctx->thr != NULL); #if 0 /* disabled for now */ restart_match: #endif DUK_ASSERT(tv != NULL); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNDEFINED: { #if defined(DUK_USE_JX) || defined(DUK_USE_JC) if (js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible) { DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_undefined); break; } else { goto emit_undefined; } #else goto emit_undefined; #endif } case DUK_TAG_NULL: { DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL); break; } case DUK_TAG_BOOLEAN: { DUK__EMIT_STRIDX(js_ctx, DUK_TVAL_GET_BOOLEAN(tv) ? DUK_STRIDX_TRUE : DUK_STRIDX_FALSE); break; } case DUK_TAG_STRING: { duk_hstring *h; h = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h != NULL); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { goto emit_undefined; } duk__enc_quote_string(js_ctx, h); break; } case DUK_TAG_OBJECT: { duk_hobject *obj; duk_tval *tv_val; duk_bool_t emitted = 0; duk_uint32_t c_bit, c_all, c_array, c_unbox, c_undef, c_func, c_bufobj, c_object, c_abort; /* For objects JSON.stringify() only looks for own, enumerable * properties which is nice for the fast path here. * * For arrays JSON.stringify() uses [[Get]] so it will actually * inherit properties during serialization! This fast path * supports gappy arrays as long as there's no actual inherited * property (which might be a getter etc). * * Since recursion only happens for objects, we can have both * recursion and loop checks here. We use a simple, depth-limited * loop check in the fast path because the object-based tracking * is very slow (when tested, it accounted for 50% of fast path * execution time for input data with a lot of small objects!). */ /* XXX: for real world code, could just ignore array inheritance * and only look at array own properties. */ /* We rely on a few object flag / class number relationships here, * assert for them. */ obj = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(obj != NULL); DUK_HOBJECT_ASSERT_VALID(obj); /* Once recursion depth is increased, exit path must decrease * it (though it's OK to abort the fast path). */ DUK_ASSERT_DISABLE(js_ctx->recursion_depth >= 0); /* unsigned */ DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit); if (js_ctx->recursion_depth >= js_ctx->recursion_limit) { DUK_DD(DUK_DDPRINT("fast path recursion limit")); DUK_ERROR_RANGE(js_ctx->thr, DUK_STR_JSONDEC_RECLIMIT); DUK_WO_NORETURN(return 0;); } for (i = 0, n = (duk_uint_fast32_t) js_ctx->recursion_depth; i < n; i++) { if (DUK_UNLIKELY(js_ctx->visiting[i] == obj)) { DUK_DD(DUK_DDPRINT("fast path loop detect")); DUK_ERROR_TYPE(js_ctx->thr, DUK_STR_CYCLIC_INPUT); DUK_WO_NORETURN(return 0;); } } /* Guaranteed by recursion_limit setup so we don't have to * check twice. */ DUK_ASSERT(js_ctx->recursion_depth < DUK_JSON_ENC_LOOPARRAY); js_ctx->visiting[js_ctx->recursion_depth] = obj; js_ctx->recursion_depth++; /* If object has a .toJSON() property, we can't be certain * that it wouldn't mutate any value arbitrarily, so bail * out of the fast path. * * If an object is a Proxy we also can't avoid side effects * so abandon. */ /* XXX: non-callable .toJSON() doesn't need to cause an abort * but does at the moment, probably not worth fixing. */ if (duk_hobject_hasprop_raw(js_ctx->thr, obj, DUK_HTHREAD_STRING_TO_JSON(js_ctx->thr)) || DUK_HOBJECT_IS_PROXY(obj)) { DUK_DD(DUK_DDPRINT("object has a .toJSON property or object is a Proxy, abort fast path")); goto abort_fastpath; } /* We could use a switch-case for the class number but it turns out * a small if-else ladder on class masks is better. The if-ladder * should be in order of relevancy. */ /* XXX: move masks to js_ctx? they don't change during one * fast path invocation. */ DUK_ASSERT(DUK_HOBJECT_CLASS_MAX <= 31); #if defined(DUK_USE_JX) || defined(DUK_USE_JC) if (js_ctx->flag_ext_custom_or_compatible) { c_all = DUK_HOBJECT_CMASK_ALL; c_array = DUK_HOBJECT_CMASK_ARRAY; c_unbox = DUK_HOBJECT_CMASK_NUMBER | DUK_HOBJECT_CMASK_STRING | DUK_HOBJECT_CMASK_BOOLEAN | DUK_HOBJECT_CMASK_POINTER; /* Symbols are not unboxed. */ c_func = DUK_HOBJECT_CMASK_FUNCTION; c_bufobj = DUK_HOBJECT_CMASK_ALL_BUFOBJS; c_undef = 0; c_abort = 0; c_object = c_all & ~(c_array | c_unbox | c_func | c_bufobj | c_undef | c_abort); } else #endif { c_all = DUK_HOBJECT_CMASK_ALL; c_array = DUK_HOBJECT_CMASK_ARRAY; c_unbox = DUK_HOBJECT_CMASK_NUMBER | DUK_HOBJECT_CMASK_STRING | DUK_HOBJECT_CMASK_BOOLEAN; /* Symbols are not unboxed. */ c_func = 0; c_bufobj = 0; c_undef = DUK_HOBJECT_CMASK_FUNCTION | DUK_HOBJECT_CMASK_POINTER; /* As the fast path doesn't currently properly support * duk_hbufobj virtual properties, abort fast path if * we encounter them in plain JSON mode. */ c_abort = DUK_HOBJECT_CMASK_ALL_BUFOBJS; c_object = c_all & ~(c_array | c_unbox | c_func | c_bufobj | c_undef | c_abort); } c_bit = (duk_uint32_t) DUK_HOBJECT_GET_CLASS_MASK(obj); if (c_bit & c_object) { /* All other object types. */ DUK__EMIT_1(js_ctx, DUK_ASC_LCURLY); /* A non-Array object should not have an array part in practice. * But since it is supported internally (and perhaps used at some * point), check and abandon if that's the case. */ if (DUK_HOBJECT_HAS_ARRAY_PART(obj)) { DUK_DD(DUK_DDPRINT("non-Array object has array part, abort fast path")); goto abort_fastpath; } for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(obj); i++) { duk_hstring *k; duk_size_t prev_size; k = DUK_HOBJECT_E_GET_KEY(js_ctx->thr->heap, obj, i); if (!k) { continue; } if (DUK_HSTRING_HAS_ARRIDX(k)) { /* If an object has array index keys we would need * to sort them into the ES2015 enumeration order to * be consistent with the slow path. Abort the fast * path and handle in the slow path for now. */ DUK_DD(DUK_DDPRINT("property key is an array index, abort fast path")); goto abort_fastpath; } if (!DUK_HOBJECT_E_SLOT_IS_ENUMERABLE(js_ctx->thr->heap, obj, i)) { continue; } if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(js_ctx->thr->heap, obj, i)) { /* Getter might have arbitrary side effects, * so bail out. */ DUK_DD(DUK_DDPRINT("property is an accessor, abort fast path")); goto abort_fastpath; } if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(k))) { continue; } tv_val = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(js_ctx->thr->heap, obj, i); prev_size = DUK_BW_GET_SIZE(js_ctx->thr, &js_ctx->bw); if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth); duk__enc_key_autoquote(js_ctx, k); DUK__EMIT_2(js_ctx, DUK_ASC_COLON, DUK_ASC_SPACE); } else { duk__enc_key_autoquote(js_ctx, k); DUK__EMIT_1(js_ctx, DUK_ASC_COLON); } if (duk__json_stringify_fast_value(js_ctx, tv_val) == 0) { DUK_DD(DUK_DDPRINT("prop value not supported, rewind key and colon")); DUK_BW_SET_SIZE(js_ctx->thr, &js_ctx->bw, prev_size); } else { DUK__EMIT_1(js_ctx, DUK_ASC_COMMA); emitted = 1; } } /* If any non-Array value had enumerable virtual own * properties, they should be serialized here (actually, * before the explicit properties). Standard types don't. */ if (emitted) { DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA); DUK__UNEMIT_1(js_ctx); /* eat trailing comma */ if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { DUK_ASSERT(js_ctx->recursion_depth >= 1); duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1U); } } DUK__EMIT_1(js_ctx, DUK_ASC_RCURLY); } else if (c_bit & c_array) { duk_uint_fast32_t arr_len; duk_uint_fast32_t asize; DUK__EMIT_1(js_ctx, DUK_ASC_LBRACKET); /* Assume arrays are dense in the fast path. */ if (!DUK_HOBJECT_HAS_ARRAY_PART(obj)) { DUK_DD(DUK_DDPRINT("Array object is sparse, abort fast path")); goto abort_fastpath; } arr_len = (duk_uint_fast32_t) ((duk_harray *) obj)->length; asize = (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(obj); /* Array part may be larger than 'length'; if so, iterate * only up to array 'length'. Array part may also be smaller * than 'length' in some cases. */ for (i = 0; i < arr_len; i++) { duk_tval *tv_arrval; duk_hstring *h_tmp; duk_bool_t has_inherited; if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth); } if (DUK_LIKELY(i < asize)) { tv_arrval = DUK_HOBJECT_A_GET_VALUE_PTR(js_ctx->thr->heap, obj, i); if (DUK_LIKELY(!DUK_TVAL_IS_UNUSED(tv_arrval))) { /* Expected case: element is present. */ if (duk__json_stringify_fast_value(js_ctx, tv_arrval) == 0) { DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL); } goto elem_done; } } /* Gap in array; check for inherited property, * bail out if one exists. This should be enough * to support gappy arrays for all practical code. */ h_tmp = duk_push_uint_to_hstring(js_ctx->thr, (duk_uint_t) i); has_inherited = duk_hobject_hasprop_raw(js_ctx->thr, obj, h_tmp); duk_pop(js_ctx->thr); if (has_inherited) { DUK_D(DUK_DPRINT("gap in array, conflicting inherited property, abort fast path")); goto abort_fastpath; } /* Ordinary gap, undefined encodes to 'null' in * standard JSON, but JX/JC use their form for * undefined to better preserve the typing. */ DUK_D(DUK_DPRINT("gap in array, no conflicting inherited property, remain on fast path")); #if defined(DUK_USE_JX) DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_undefined); #else DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL); #endif /* fall through */ elem_done: DUK__EMIT_1(js_ctx, DUK_ASC_COMMA); emitted = 1; } if (emitted) { DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA); DUK__UNEMIT_1(js_ctx); /* eat trailing comma */ if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) { DUK_ASSERT(js_ctx->recursion_depth >= 1); duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1U); } } DUK__EMIT_1(js_ctx, DUK_ASC_RBRACKET); } else if (c_bit & c_unbox) { /* Certain boxed types are required to go through * automatic unboxing. Rely on internal value being * sane (to avoid infinite recursion). */ DUK_ASSERT((c_bit & DUK_HOBJECT_CMASK_SYMBOL) == 0); /* Symbols are not unboxed. */ #if 1 /* The code below is incorrect if .toString() or .valueOf() have * have been overridden. The correct approach would be to look up * the method(s) and if they resolve to the built-in function we * can safely bypass it and look up the internal value directly. * Unimplemented for now, abort fast path for boxed values. */ goto abort_fastpath; #else /* disabled */ /* Disabled until fixed, see above. */ duk_tval *tv_internal; DUK_DD(DUK_DDPRINT("auto unboxing in fast path")); tv_internal = duk_hobject_get_internal_value_tval_ptr(js_ctx->thr->heap, obj); DUK_ASSERT(tv_internal != NULL); DUK_ASSERT(DUK_TVAL_IS_STRING(tv_internal) || DUK_TVAL_IS_NUMBER(tv_internal) || DUK_TVAL_IS_BOOLEAN(tv_internal) || DUK_TVAL_IS_POINTER(tv_internal)); tv = tv_internal; DUK_ASSERT(js_ctx->recursion_depth > 0); js_ctx->recursion_depth--; /* required to keep recursion depth correct */ goto restart_match; #endif /* disabled */ #if defined(DUK_USE_JX) || defined(DUK_USE_JC) } else if (c_bit & c_func) { DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_function); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) } else if (c_bit & c_bufobj) { duk__enc_bufobj(js_ctx, (duk_hbufobj *) obj); #endif #endif } else if (c_bit & c_abort) { DUK_DD(DUK_DDPRINT("abort fast path for unsupported type")); goto abort_fastpath; } else { DUK_ASSERT((c_bit & c_undef) != 0); /* Must decrease recursion depth before returning. */ DUK_ASSERT(js_ctx->recursion_depth > 0); DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit); js_ctx->recursion_depth--; goto emit_undefined; } DUK_ASSERT(js_ctx->recursion_depth > 0); DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit); js_ctx->recursion_depth--; break; } case DUK_TAG_BUFFER: { /* Plain buffers are treated like Uint8Arrays: they have * enumerable indices. Other virtual properties are not * enumerable, and inherited properties are not serialized. * However, there can be a replacer (not relevant here) or * a .toJSON() method (which we need to check for explicitly). */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) if (duk_hobject_hasprop_raw(js_ctx->thr, js_ctx->thr->builtins[DUK_BIDX_UINT8ARRAY_PROTOTYPE], DUK_HTHREAD_STRING_TO_JSON(js_ctx->thr))) { DUK_DD(DUK_DDPRINT("value is a plain buffer and there's an inherited .toJSON, abort fast path")); goto abort_fastpath; } #endif #if defined(DUK_USE_JX) || defined(DUK_USE_JC) if (js_ctx->flag_ext_custom_or_compatible) { duk__enc_buffer_jx_jc(js_ctx, DUK_TVAL_GET_BUFFER(tv)); break; } #endif /* Plain buffers mimic Uint8Arrays, and have enumerable index * properties. */ duk__enc_buffer_json_fastpath(js_ctx, DUK_TVAL_GET_BUFFER(tv)); break; } case DUK_TAG_POINTER: { #if defined(DUK_USE_JX) || defined(DUK_USE_JC) if (js_ctx->flag_ext_custom_or_compatible) { duk__enc_pointer(js_ctx, DUK_TVAL_GET_POINTER(tv)); break; } else { goto emit_undefined; } #else goto emit_undefined; #endif } case DUK_TAG_LIGHTFUNC: { /* A lightfunc might also inherit a .toJSON() so just bail out. */ /* XXX: Could just lookup .toJSON() and continue in fast path, * as it would almost never be defined. */ DUK_DD(DUK_DDPRINT("value is a lightfunc, abort fast path")); goto abort_fastpath; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: { /* Number serialization has a significant impact relative to * other fast path code, so careful fast path for fastints. */ duk__enc_fastint_tval(js_ctx, tv); break; } #endif default: { /* XXX: A fast path for usual integers would be useful when * fastint support is not enabled. */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); /* XXX: Stack discipline is annoying, could be changed in numconv. */ duk_push_tval(js_ctx->thr, tv); duk__enc_double(js_ctx); duk_pop(js_ctx->thr); #if 0 /* Could also rely on native sprintf(), but it will handle * values like NaN, Infinity, -0, exponent notation etc in * a JSON-incompatible way. */ duk_double_t d; char buf[64]; DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv)); d = DUK_TVAL_GET_DOUBLE(tv); DUK_SPRINTF(buf, "%lg", d); DUK__EMIT_CSTR(js_ctx, buf); #endif } } return 1; /* not undefined */ emit_undefined: return 0; /* value was undefined/unsupported */ abort_fastpath: /* Error message doesn't matter: the error is ignored anyway. */ DUK_DD(DUK_DDPRINT("aborting fast path")); DUK_ERROR_INTERNAL(js_ctx->thr); DUK_WO_NORETURN(return 0;); } DUK_LOCAL duk_ret_t duk__json_stringify_fast(duk_hthread *thr, void *udata) { duk_json_enc_ctx *js_ctx; duk_tval *tv; DUK_ASSERT(thr != NULL); DUK_ASSERT(udata != NULL); js_ctx = (duk_json_enc_ctx *) udata; DUK_ASSERT(js_ctx != NULL); tv = DUK_GET_TVAL_NEGIDX(thr, -1); if (duk__json_stringify_fast_value(js_ctx, tv) == 0) { DUK_DD(DUK_DDPRINT("top level value not supported, fail fast path")); DUK_DCERROR_TYPE_INVALID_ARGS(thr); /* Error message is ignored, so doesn't matter. */ } return 0; } #endif /* DUK_USE_JSON_STRINGIFY_FASTPATH */ /* * Top level wrappers */ DUK_INTERNAL void duk_bi_json_parse_helper(duk_hthread *thr, duk_idx_t idx_value, duk_idx_t idx_reviver, duk_small_uint_t flags) { duk_json_dec_ctx js_ctx_alloc; duk_json_dec_ctx *js_ctx = &js_ctx_alloc; duk_hstring *h_text; #if defined(DUK_USE_ASSERTIONS) duk_idx_t entry_top = duk_get_top(thr); #endif /* negative top-relative indices not allowed now */ DUK_ASSERT(idx_value == DUK_INVALID_INDEX || idx_value >= 0); DUK_ASSERT(idx_reviver == DUK_INVALID_INDEX || idx_reviver >= 0); DUK_DDD(DUK_DDDPRINT("JSON parse start: text=%!T, reviver=%!T, flags=0x%08lx, stack_top=%ld", (duk_tval *) duk_get_tval(thr, idx_value), (duk_tval *) duk_get_tval(thr, idx_reviver), (unsigned long) flags, (long) duk_get_top(thr))); duk_memzero(&js_ctx_alloc, sizeof(js_ctx_alloc)); js_ctx->thr = thr; #if defined(DUK_USE_EXPLICIT_NULL_INIT) /* nothing now */ #endif js_ctx->recursion_limit = DUK_USE_JSON_DEC_RECLIMIT; DUK_ASSERT(js_ctx->recursion_depth == 0); /* Flag handling currently assumes that flags are consistent. This is OK * because the call sites are now strictly controlled. */ js_ctx->flags = flags; #if defined(DUK_USE_JX) js_ctx->flag_ext_custom = flags & DUK_JSON_FLAG_EXT_CUSTOM; #endif #if defined(DUK_USE_JC) js_ctx->flag_ext_compatible = flags & DUK_JSON_FLAG_EXT_COMPATIBLE; #endif #if defined(DUK_USE_JX) || defined(DUK_USE_JC) js_ctx->flag_ext_custom_or_compatible = flags & (DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_EXT_COMPATIBLE); #endif h_text = duk_to_hstring(thr, idx_value); /* coerce in-place; rejects Symbols */ DUK_ASSERT(h_text != NULL); /* JSON parsing code is allowed to read [p_start,p_end]: p_end is * valid and points to the string NUL terminator (which is always * guaranteed for duk_hstrings. */ js_ctx->p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_text); js_ctx->p = js_ctx->p_start; js_ctx->p_end = ((const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_text)) + DUK_HSTRING_GET_BYTELEN(h_text); DUK_ASSERT(*(js_ctx->p_end) == 0x00); duk__dec_value(js_ctx); /* -> [ ... value ] */ /* Trailing whitespace has been eaten by duk__dec_value(), so if * we're not at end of input here, it's a SyntaxError. */ if (js_ctx->p != js_ctx->p_end) { duk__dec_syntax_error(js_ctx); } if (duk_is_callable(thr, idx_reviver)) { DUK_DDD(DUK_DDDPRINT("applying reviver: %!T", (duk_tval *) duk_get_tval(thr, idx_reviver))); js_ctx->idx_reviver = idx_reviver; duk_push_object(thr); duk_dup_m2(thr); /* -> [ ... val root val ] */ duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_EMPTY_STRING); /* default attrs ok */ duk_push_hstring_stridx(thr, DUK_STRIDX_EMPTY_STRING); /* -> [ ... val root "" ] */ DUK_DDD(DUK_DDDPRINT("start reviver walk, root=%!T, name=%!T", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); duk__dec_reviver_walk(js_ctx); /* [ ... val root "" ] -> [ ... val val' ] */ duk_remove_m2(thr); /* -> [ ... val' ] */ } else { DUK_DDD(DUK_DDDPRINT("reviver does not exist or is not callable: %!T", (duk_tval *) duk_get_tval(thr, idx_reviver))); } /* Final result is at stack top. */ DUK_DDD(DUK_DDDPRINT("JSON parse end: text=%!T, reviver=%!T, flags=0x%08lx, result=%!T, stack_top=%ld", (duk_tval *) duk_get_tval(thr, idx_value), (duk_tval *) duk_get_tval(thr, idx_reviver), (unsigned long) flags, (duk_tval *) duk_get_tval(thr, -1), (long) duk_get_top(thr))); DUK_ASSERT(duk_get_top(thr) == entry_top + 1); } DUK_INTERNAL void duk_bi_json_stringify_helper(duk_hthread *thr, duk_idx_t idx_value, duk_idx_t idx_replacer, duk_idx_t idx_space, duk_small_uint_t flags) { duk_json_enc_ctx js_ctx_alloc; duk_json_enc_ctx *js_ctx = &js_ctx_alloc; duk_hobject *h; duk_idx_t idx_holder; duk_idx_t entry_top; /* negative top-relative indices not allowed now */ DUK_ASSERT(idx_value == DUK_INVALID_INDEX || idx_value >= 0); DUK_ASSERT(idx_replacer == DUK_INVALID_INDEX || idx_replacer >= 0); DUK_ASSERT(idx_space == DUK_INVALID_INDEX || idx_space >= 0); DUK_DDD(DUK_DDDPRINT("JSON stringify start: value=%!T, replacer=%!T, space=%!T, flags=0x%08lx, stack_top=%ld", (duk_tval *) duk_get_tval(thr, idx_value), (duk_tval *) duk_get_tval(thr, idx_replacer), (duk_tval *) duk_get_tval(thr, idx_space), (unsigned long) flags, (long) duk_get_top(thr))); entry_top = duk_get_top(thr); /* * Context init */ duk_memzero(&js_ctx_alloc, sizeof(js_ctx_alloc)); js_ctx->thr = thr; #if defined(DUK_USE_EXPLICIT_NULL_INIT) js_ctx->h_replacer = NULL; js_ctx->h_gap = NULL; #endif js_ctx->idx_proplist = -1; /* Flag handling currently assumes that flags are consistent. This is OK * because the call sites are now strictly controlled. */ js_ctx->flags = flags; js_ctx->flag_ascii_only = flags & DUK_JSON_FLAG_ASCII_ONLY; js_ctx->flag_avoid_key_quotes = flags & DUK_JSON_FLAG_AVOID_KEY_QUOTES; #if defined(DUK_USE_JX) js_ctx->flag_ext_custom = flags & DUK_JSON_FLAG_EXT_CUSTOM; #endif #if defined(DUK_USE_JC) js_ctx->flag_ext_compatible = flags & DUK_JSON_FLAG_EXT_COMPATIBLE; #endif #if defined(DUK_USE_JX) || defined(DUK_USE_JC) js_ctx->flag_ext_custom_or_compatible = flags & (DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_EXT_COMPATIBLE); #endif /* The #if defined() clutter here handles the JX/JC enable/disable * combinations properly. */ #if defined(DUK_USE_JX) || defined(DUK_USE_JC) js_ctx->stridx_custom_undefined = DUK_STRIDX_LC_NULL; /* standard JSON; array gaps */ #if defined(DUK_USE_JX) if (flags & DUK_JSON_FLAG_EXT_CUSTOM) { js_ctx->stridx_custom_undefined = DUK_STRIDX_LC_UNDEFINED; js_ctx->stridx_custom_nan = DUK_STRIDX_NAN; js_ctx->stridx_custom_neginf = DUK_STRIDX_MINUS_INFINITY; js_ctx->stridx_custom_posinf = DUK_STRIDX_INFINITY; js_ctx->stridx_custom_function = (flags & DUK_JSON_FLAG_AVOID_KEY_QUOTES) ? DUK_STRIDX_JSON_EXT_FUNCTION2 : DUK_STRIDX_JSON_EXT_FUNCTION1; } #endif /* DUK_USE_JX */ #if defined(DUK_USE_JX) && defined(DUK_USE_JC) else #endif /* DUK_USE_JX && DUK_USE_JC */ #if defined(DUK_USE_JC) if (js_ctx->flags & DUK_JSON_FLAG_EXT_COMPATIBLE) { js_ctx->stridx_custom_undefined = DUK_STRIDX_JSON_EXT_UNDEFINED; js_ctx->stridx_custom_nan = DUK_STRIDX_JSON_EXT_NAN; js_ctx->stridx_custom_neginf = DUK_STRIDX_JSON_EXT_NEGINF; js_ctx->stridx_custom_posinf = DUK_STRIDX_JSON_EXT_POSINF; js_ctx->stridx_custom_function = DUK_STRIDX_JSON_EXT_FUNCTION1; } #endif /* DUK_USE_JC */ #endif /* DUK_USE_JX || DUK_USE_JC */ #if defined(DUK_USE_JX) || defined(DUK_USE_JC) if (js_ctx->flags & (DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_EXT_COMPATIBLE)) { DUK_ASSERT(js_ctx->mask_for_undefined == 0); /* already zero */ } else #endif /* DUK_USE_JX || DUK_USE_JC */ { /* Plain buffer is treated like ArrayBuffer and serialized. * Lightfuncs are treated like objects, but JSON explicitly * skips serializing Function objects so we can just reject * lightfuncs here. */ js_ctx->mask_for_undefined = DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_POINTER | DUK_TYPE_MASK_LIGHTFUNC; } DUK_BW_INIT_PUSHBUF(thr, &js_ctx->bw, DUK__JSON_STRINGIFY_BUFSIZE); js_ctx->idx_loop = duk_push_bare_object(thr); DUK_ASSERT(js_ctx->idx_loop >= 0); /* [ ... buf loop ] */ /* * Process replacer/proplist (2nd argument to JSON.stringify) */ h = duk_get_hobject(thr, idx_replacer); if (h != NULL) { if (DUK_HOBJECT_IS_CALLABLE(h)) { js_ctx->h_replacer = h; } else if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY) { /* Here the specification requires correct array index enumeration * which is a bit tricky for sparse arrays (it is handled by the * enum setup code). We now enumerate ancestors too, although the * specification is not very clear on whether that is required. */ duk_uarridx_t plist_idx = 0; duk_small_uint_t enum_flags; js_ctx->idx_proplist = duk_push_array(thr); /* XXX: array internal? */ enum_flags = DUK_ENUM_ARRAY_INDICES_ONLY | DUK_ENUM_SORT_ARRAY_INDICES; /* expensive flag */ duk_enum(thr, idx_replacer, enum_flags); while (duk_next(thr, -1 /*enum_index*/, 1 /*get_value*/)) { /* [ ... proplist enum_obj key val ] */ if (duk__enc_allow_into_proplist(duk_get_tval(thr, -1))) { /* XXX: duplicates should be eliminated here */ DUK_DDD(DUK_DDDPRINT("proplist enum: key=%!T, val=%!T --> accept", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); duk_to_string(thr, -1); /* extra coercion of strings is OK */ duk_put_prop_index(thr, -4, plist_idx); /* -> [ ... proplist enum_obj key ] */ plist_idx++; duk_pop(thr); } else { DUK_DDD(DUK_DDDPRINT("proplist enum: key=%!T, val=%!T --> reject", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); duk_pop_2(thr); } } duk_pop(thr); /* pop enum */ /* [ ... proplist ] */ } } /* [ ... buf loop (proplist) ] */ /* * Process space (3rd argument to JSON.stringify) */ h = duk_get_hobject(thr, idx_space); if (h != NULL) { duk_small_uint_t c = DUK_HOBJECT_GET_CLASS_NUMBER(h); if (c == DUK_HOBJECT_CLASS_NUMBER) { duk_to_number(thr, idx_space); } else if (c == DUK_HOBJECT_CLASS_STRING) { duk_to_string(thr, idx_space); } } if (duk_is_number(thr, idx_space)) { duk_small_int_t nspace; /* spaces[] must be static to allow initializer with old compilers like BCC */ static const char spaces[10] = { DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE }; /* XXX: helper */ /* ToInteger() coercion; NaN -> 0, infinities are clamped to 0 and 10 */ nspace = (duk_small_int_t) duk_to_int_clamped(thr, idx_space, 0 /*minval*/, 10 /*maxval*/); DUK_ASSERT(nspace >= 0 && nspace <= 10); duk_push_lstring(thr, spaces, (duk_size_t) nspace); js_ctx->h_gap = duk_known_hstring(thr, -1); DUK_ASSERT(js_ctx->h_gap != NULL); } else if (duk_is_string_notsymbol(thr, idx_space)) { duk_dup(thr, idx_space); duk_substring(thr, -1, 0, 10); /* clamp to 10 chars */ js_ctx->h_gap = duk_known_hstring(thr, -1); } else { /* nop */ } if (js_ctx->h_gap != NULL) { /* If gap is empty, behave as if not given at all. Check * against byte length because character length is more * expensive. */ if (DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap) == 0) { js_ctx->h_gap = NULL; } } /* [ ... buf loop (proplist) (gap) ] */ /* * Fast path: assume no mutation, iterate object property tables * directly; bail out if that assumption doesn't hold. */ #if defined(DUK_USE_JSON_STRINGIFY_FASTPATH) if (js_ctx->h_replacer == NULL && /* replacer is a mutation risk */ js_ctx->idx_proplist == -1) { /* proplist is very rare */ duk_int_t pcall_rc; duk_small_uint_t prev_ms_base_flags; DUK_DD(DUK_DDPRINT("try JSON.stringify() fast path")); /* Use recursion_limit to ensure we don't overwrite js_ctx->visiting[] * array so we don't need two counter checks in the fast path. The * slow path has a much larger recursion limit which we'll use if * necessary. */ DUK_ASSERT(DUK_USE_JSON_ENC_RECLIMIT >= DUK_JSON_ENC_LOOPARRAY); js_ctx->recursion_limit = DUK_JSON_ENC_LOOPARRAY; DUK_ASSERT(js_ctx->recursion_depth == 0); /* Execute the fast path in a protected call. If any error is thrown, * fall back to the slow path. This includes e.g. recursion limit * because the fast path has a smaller recursion limit (and simpler, * limited loop detection). */ duk_dup(thr, idx_value); /* Must prevent finalizers which may have arbitrary side effects. */ prev_ms_base_flags = thr->heap->ms_base_flags; thr->heap->ms_base_flags |= DUK_MS_FLAG_NO_OBJECT_COMPACTION; /* Avoid attempt to compact any objects. */ thr->heap->pf_prevent_count++; /* Prevent finalizers. */ DUK_ASSERT(thr->heap->pf_prevent_count != 0); /* Wrap. */ pcall_rc = duk_safe_call(thr, duk__json_stringify_fast, (void *) js_ctx /*udata*/, 1 /*nargs*/, 0 /*nret*/); DUK_ASSERT(thr->heap->pf_prevent_count > 0); thr->heap->pf_prevent_count--; thr->heap->ms_base_flags = prev_ms_base_flags; if (pcall_rc == DUK_EXEC_SUCCESS) { DUK_DD(DUK_DDPRINT("fast path successful")); DUK_BW_PUSH_AS_STRING(thr, &js_ctx->bw); goto replace_finished; } /* We come here for actual aborts (like encountering .toJSON()) * but also for recursion/loop errors. Bufwriter size can be * kept because we'll probably need at least as much as we've * allocated so far. */ DUK_D(DUK_DPRINT("fast path failed, serialize using slow path instead")); DUK_BW_RESET_SIZE(thr, &js_ctx->bw); js_ctx->recursion_depth = 0; } #endif /* * Create wrapper object and serialize */ idx_holder = duk_push_object(thr); duk_dup(thr, idx_value); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_EMPTY_STRING); DUK_DDD(DUK_DDDPRINT("before: flags=0x%08lx, loop=%!T, replacer=%!O, " "proplist=%!T, gap=%!O, holder=%!T", (unsigned long) js_ctx->flags, (duk_tval *) duk_get_tval(thr, js_ctx->idx_loop), (duk_heaphdr *) js_ctx->h_replacer, (duk_tval *) (js_ctx->idx_proplist >= 0 ? duk_get_tval(thr, js_ctx->idx_proplist) : NULL), (duk_heaphdr *) js_ctx->h_gap, (duk_tval *) duk_get_tval(thr, -1))); /* serialize the wrapper with empty string key */ duk_push_hstring_empty(thr); /* [ ... buf loop (proplist) (gap) holder "" ] */ js_ctx->recursion_limit = DUK_USE_JSON_ENC_RECLIMIT; DUK_ASSERT(js_ctx->recursion_depth == 0); if (DUK_UNLIKELY(duk__enc_value(js_ctx, idx_holder) == 0)) { /* [ ... holder key ] -> [ ... holder ] */ /* Result is undefined. */ duk_push_undefined(thr); } else { /* Convert buffer to result string. */ DUK_BW_PUSH_AS_STRING(thr, &js_ctx->bw); } DUK_DDD(DUK_DDDPRINT("after: flags=0x%08lx, loop=%!T, replacer=%!O, " "proplist=%!T, gap=%!O, holder=%!T", (unsigned long) js_ctx->flags, (duk_tval *) duk_get_tval(thr, js_ctx->idx_loop), (duk_heaphdr *) js_ctx->h_replacer, (duk_tval *) (js_ctx->idx_proplist >= 0 ? duk_get_tval(thr, js_ctx->idx_proplist) : NULL), (duk_heaphdr *) js_ctx->h_gap, (duk_tval *) duk_get_tval(thr, idx_holder))); /* The stack has a variable shape here, so force it to the * desired one explicitly. */ #if defined(DUK_USE_JSON_STRINGIFY_FASTPATH) replace_finished: #endif duk_replace(thr, entry_top); duk_set_top(thr, entry_top + 1); DUK_DDD(DUK_DDDPRINT("JSON stringify end: value=%!T, replacer=%!T, space=%!T, " "flags=0x%08lx, result=%!T, stack_top=%ld", (duk_tval *) duk_get_tval(thr, idx_value), (duk_tval *) duk_get_tval(thr, idx_replacer), (duk_tval *) duk_get_tval(thr, idx_space), (unsigned long) flags, (duk_tval *) duk_get_tval(thr, -1), (long) duk_get_top(thr))); DUK_ASSERT(duk_get_top(thr) == entry_top + 1); } #if defined(DUK_USE_JSON_BUILTIN) /* * Entry points */ DUK_INTERNAL duk_ret_t duk_bi_json_object_parse(duk_hthread *thr) { duk_bi_json_parse_helper(thr, 0 /*idx_value*/, 1 /*idx_replacer*/, 0 /*flags*/); return 1; } DUK_INTERNAL duk_ret_t duk_bi_json_object_stringify(duk_hthread *thr) { duk_bi_json_stringify_helper(thr, 0 /*idx_value*/, 1 /*idx_replacer*/, 2 /*idx_space*/, 0 /*flags*/); return 1; } #endif /* DUK_USE_JSON_BUILTIN */ #endif /* DUK_USE_JSON_SUPPORT */ /* automatic undefs */ #undef DUK__EMIT_1 #undef DUK__EMIT_2 #undef DUK__EMIT_CSTR #undef DUK__EMIT_HSTR #undef DUK__EMIT_STRIDX #undef DUK__JSON_DECSTR_BUFSIZE #undef DUK__JSON_DECSTR_CHUNKSIZE #undef DUK__JSON_ENCSTR_CHUNKSIZE #undef DUK__JSON_MAX_ESC_LEN #undef DUK__JSON_STRINGIFY_BUFSIZE #undef DUK__MKESC #undef DUK__UNEMIT_1 /* * Math built-ins */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_MATH_BUILTIN) /* * Use static helpers which can work with math.h functions matching * the following signatures. This is not portable if any of these math * functions is actually a macro. * * Typing here is intentionally 'double' wherever values interact with * the standard library APIs. */ typedef double (*duk__one_arg_func)(double); typedef double (*duk__two_arg_func)(double, double); DUK_LOCAL duk_ret_t duk__math_minmax(duk_hthread *thr, duk_double_t initial, duk__two_arg_func min_max) { duk_idx_t n = duk_get_top(thr); duk_idx_t i; duk_double_t res = initial; duk_double_t t; /* * Note: fmax() does not match the E5 semantics. E5 requires * that if -any- input to Math.max() is a NaN, the result is a * NaN. fmax() will return a NaN only if -both- inputs are NaN. * Same applies to fmin(). * * Note: every input value must be coerced with ToNumber(), even * if we know the result will be a NaN anyway: ToNumber() may have * side effects for which even order of evaluation matters. */ for (i = 0; i < n; i++) { t = duk_to_number(thr, i); if (DUK_FPCLASSIFY(t) == DUK_FP_NAN || DUK_FPCLASSIFY(res) == DUK_FP_NAN) { /* Note: not normalized, but duk_push_number() will normalize */ res = (duk_double_t) DUK_DOUBLE_NAN; } else { res = (duk_double_t) min_max(res, (double) t); } } duk_push_number(thr, res); return 1; } DUK_LOCAL double duk__fmin_fixed(double x, double y) { /* fmin() with args -0 and +0 is not guaranteed to return * -0 as ECMAScript requires. */ if (x == 0 && y == 0) { duk_double_union du1, du2; du1.d = x; du2.d = y; /* Already checked to be zero so these must hold, and allow us * to check for "x is -0 or y is -0" by ORing the high parts * for comparison. */ DUK_ASSERT(du1.ui[DUK_DBL_IDX_UI0] == 0 || du1.ui[DUK_DBL_IDX_UI0] == 0x80000000UL); DUK_ASSERT(du2.ui[DUK_DBL_IDX_UI0] == 0 || du2.ui[DUK_DBL_IDX_UI0] == 0x80000000UL); /* XXX: what's the safest way of creating a negative zero? */ if ((du1.ui[DUK_DBL_IDX_UI0] | du2.ui[DUK_DBL_IDX_UI0]) != 0) { /* Enter here if either x or y (or both) is -0. */ return -0.0; } else { return +0.0; } } return duk_double_fmin(x, y); } DUK_LOCAL double duk__fmax_fixed(double x, double y) { /* fmax() with args -0 and +0 is not guaranteed to return * +0 as ECMAScript requires. */ if (x == 0 && y == 0) { if (DUK_SIGNBIT(x) == 0 || DUK_SIGNBIT(y) == 0) { return +0.0; } else { return -0.0; } } return duk_double_fmax(x, y); } #if defined(DUK_USE_ES6) DUK_LOCAL double duk__cbrt(double x) { /* cbrt() is C99. To avoid hassling embedders with the need to provide a * cube root function, we can get by with pow(). The result is not * identical, but that's OK: ES2015 says it's implementation-dependent. */ #if defined(DUK_CBRT) /* cbrt() matches ES2015 requirements. */ return DUK_CBRT(x); #else duk_small_int_t c = (duk_small_int_t) DUK_FPCLASSIFY(x); /* pow() does not, however. */ if (c == DUK_FP_NAN || c == DUK_FP_INFINITE || c == DUK_FP_ZERO) { return x; } if (DUK_SIGNBIT(x)) { return -DUK_POW(-x, 1.0 / 3.0); } else { return DUK_POW(x, 1.0 / 3.0); } #endif } DUK_LOCAL double duk__log2(double x) { #if defined(DUK_LOG2) return DUK_LOG2(x); #else return DUK_LOG(x) * DUK_DOUBLE_LOG2E; #endif } DUK_LOCAL double duk__log10(double x) { #if defined(DUK_LOG10) return DUK_LOG10(x); #else return DUK_LOG(x) * DUK_DOUBLE_LOG10E; #endif } DUK_LOCAL double duk__trunc(double x) { #if defined(DUK_TRUNC) return DUK_TRUNC(x); #else /* Handles -0 correctly: -0.0 matches 'x >= 0.0' but floor() * is required to return -0 when the argument is -0. */ return x >= 0.0 ? DUK_FLOOR(x) : DUK_CEIL(x); #endif } #endif /* DUK_USE_ES6 */ DUK_LOCAL double duk__round_fixed(double x) { /* Numbers half-way between integers must be rounded towards +Infinity, * e.g. -3.5 must be rounded to -3 (not -4). When rounded to zero, zero * sign must be set appropriately. E5.1 Section 15.8.2.15. * * Note that ANSI C round() is "round to nearest integer, away from zero", * which is incorrect for negative values. Here we make do with floor(). */ duk_small_int_t c = (duk_small_int_t) DUK_FPCLASSIFY(x); if (c == DUK_FP_NAN || c == DUK_FP_INFINITE || c == DUK_FP_ZERO) { return x; } /* * x is finite and non-zero * * -1.6 -> floor(-1.1) -> -2 * -1.5 -> floor(-1.0) -> -1 (towards +Inf) * -1.4 -> floor(-0.9) -> -1 * -0.5 -> -0.0 (special case) * -0.1 -> -0.0 (special case) * +0.1 -> +0.0 (special case) * +0.5 -> floor(+1.0) -> 1 (towards +Inf) * +1.4 -> floor(+1.9) -> 1 * +1.5 -> floor(+2.0) -> 2 (towards +Inf) * +1.6 -> floor(+2.1) -> 2 */ if (x >= -0.5 && x < 0.5) { /* +0.5 is handled by floor, this is on purpose */ if (x < 0.0) { return -0.0; } else { return +0.0; } } return DUK_FLOOR(x + 0.5); } /* Wrappers for calling standard math library methods. These may be required * on platforms where one or more of the math built-ins are defined as macros * or inline functions and are thus not suitable to be used as function pointers. */ #if defined(DUK_USE_AVOID_PLATFORM_FUNCPTRS) DUK_LOCAL double duk__fabs(double x) { return DUK_FABS(x); } DUK_LOCAL double duk__acos(double x) { return DUK_ACOS(x); } DUK_LOCAL double duk__asin(double x) { return DUK_ASIN(x); } DUK_LOCAL double duk__atan(double x) { return DUK_ATAN(x); } DUK_LOCAL double duk__ceil(double x) { return DUK_CEIL(x); } DUK_LOCAL double duk__cos(double x) { return DUK_COS(x); } DUK_LOCAL double duk__exp(double x) { return DUK_EXP(x); } DUK_LOCAL double duk__floor(double x) { return DUK_FLOOR(x); } DUK_LOCAL double duk__log(double x) { return DUK_LOG(x); } DUK_LOCAL double duk__sin(double x) { return DUK_SIN(x); } DUK_LOCAL double duk__sqrt(double x) { return DUK_SQRT(x); } DUK_LOCAL double duk__tan(double x) { return DUK_TAN(x); } DUK_LOCAL double duk__atan2_fixed(double x, double y) { #if defined(DUK_USE_ATAN2_WORKAROUNDS) /* Specific fixes to common atan2() implementation issues: * - test-bug-mingw-math-issues.js */ if (DUK_ISINF(x) && DUK_ISINF(y)) { if (DUK_SIGNBIT(x)) { if (DUK_SIGNBIT(y)) { return -2.356194490192345; } else { return -0.7853981633974483; } } else { if (DUK_SIGNBIT(y)) { return 2.356194490192345; } else { return 0.7853981633974483; } } } #else /* Some ISO C assumptions. */ DUK_ASSERT(DUK_ATAN2(DUK_DOUBLE_INFINITY, DUK_DOUBLE_INFINITY) == 0.7853981633974483); DUK_ASSERT(DUK_ATAN2(-DUK_DOUBLE_INFINITY, DUK_DOUBLE_INFINITY) == -0.7853981633974483); DUK_ASSERT(DUK_ATAN2(DUK_DOUBLE_INFINITY, -DUK_DOUBLE_INFINITY) == 2.356194490192345); DUK_ASSERT(DUK_ATAN2(-DUK_DOUBLE_INFINITY, -DUK_DOUBLE_INFINITY) == -2.356194490192345); #endif return DUK_ATAN2(x, y); } #endif /* DUK_USE_AVOID_PLATFORM_FUNCPTRS */ /* order must match constants in genbuiltins.py */ DUK_LOCAL const duk__one_arg_func duk__one_arg_funcs[] = { #if defined(DUK_USE_AVOID_PLATFORM_FUNCPTRS) duk__fabs, duk__acos, duk__asin, duk__atan, duk__ceil, duk__cos, duk__exp, duk__floor, duk__log, duk__round_fixed, duk__sin, duk__sqrt, duk__tan, #if defined(DUK_USE_ES6) duk__cbrt, duk__log2, duk__log10, duk__trunc #endif #else /* DUK_USE_AVOID_PLATFORM_FUNCPTRS */ DUK_FABS, DUK_ACOS, DUK_ASIN, DUK_ATAN, DUK_CEIL, DUK_COS, DUK_EXP, DUK_FLOOR, DUK_LOG, duk__round_fixed, DUK_SIN, DUK_SQRT, DUK_TAN, #if defined(DUK_USE_ES6) duk__cbrt, duk__log2, duk__log10, duk__trunc #endif #endif /* DUK_USE_AVOID_PLATFORM_FUNCPTRS */ }; /* order must match constants in genbuiltins.py */ DUK_LOCAL const duk__two_arg_func duk__two_arg_funcs[] = { #if defined(DUK_USE_AVOID_PLATFORM_FUNCPTRS) duk__atan2_fixed, duk_js_arith_pow #else duk__atan2_fixed, duk_js_arith_pow #endif }; DUK_INTERNAL duk_ret_t duk_bi_math_object_onearg_shared(duk_hthread *thr) { duk_small_int_t fun_idx = duk_get_current_magic(thr); duk__one_arg_func fun; duk_double_t arg1; DUK_ASSERT(fun_idx >= 0); DUK_ASSERT(fun_idx < (duk_small_int_t) (sizeof(duk__one_arg_funcs) / sizeof(duk__one_arg_func))); arg1 = duk_to_number(thr, 0); fun = duk__one_arg_funcs[fun_idx]; duk_push_number(thr, (duk_double_t) fun((double) arg1)); return 1; } DUK_INTERNAL duk_ret_t duk_bi_math_object_twoarg_shared(duk_hthread *thr) { duk_small_int_t fun_idx = duk_get_current_magic(thr); duk__two_arg_func fun; duk_double_t arg1; duk_double_t arg2; DUK_ASSERT(fun_idx >= 0); DUK_ASSERT(fun_idx < (duk_small_int_t) (sizeof(duk__two_arg_funcs) / sizeof(duk__two_arg_func))); arg1 = duk_to_number(thr, 0); /* explicit ordered evaluation to match coercion semantics */ arg2 = duk_to_number(thr, 1); fun = duk__two_arg_funcs[fun_idx]; duk_push_number(thr, (duk_double_t) fun((double) arg1, (double) arg2)); return 1; } DUK_INTERNAL duk_ret_t duk_bi_math_object_max(duk_hthread *thr) { return duk__math_minmax(thr, -DUK_DOUBLE_INFINITY, duk__fmax_fixed); } DUK_INTERNAL duk_ret_t duk_bi_math_object_min(duk_hthread *thr) { return duk__math_minmax(thr, DUK_DOUBLE_INFINITY, duk__fmin_fixed); } DUK_INTERNAL duk_ret_t duk_bi_math_object_random(duk_hthread *thr) { duk_push_number(thr, (duk_double_t) DUK_UTIL_GET_RANDOM_DOUBLE(thr)); return 1; } #if defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_math_object_hypot(duk_hthread *thr) { /* * E6 Section 20.2.2.18: Math.hypot * * - If no arguments are passed, the result is +0. * - If any argument is +inf, the result is +inf. * - If any argument is -inf, the result is +inf. * - If no argument is +inf or -inf, and any argument is NaN, the result is * NaN. * - If all arguments are either +0 or -0, the result is +0. */ duk_idx_t nargs; duk_idx_t i; duk_bool_t found_nan; duk_double_t max; duk_double_t sum, summand; duk_double_t comp, prelim; duk_double_t t; nargs = duk_get_top(thr); /* Find the highest value. Also ToNumber() coerces. */ max = 0.0; found_nan = 0; for (i = 0; i < nargs; i++) { t = DUK_FABS(duk_to_number(thr, i)); if (DUK_FPCLASSIFY(t) == DUK_FP_NAN) { found_nan = 1; } else { max = duk_double_fmax(max, t); } } /* Early return cases. */ if (max == DUK_DOUBLE_INFINITY) { duk_push_number(thr, DUK_DOUBLE_INFINITY); return 1; } else if (found_nan) { duk_push_number(thr, DUK_DOUBLE_NAN); return 1; } else if (max == 0.0) { duk_push_number(thr, 0.0); /* Otherwise we'd divide by zero. */ return 1; } /* Use Kahan summation and normalize to the highest value to minimize * floating point rounding error and avoid overflow. * * https://en.wikipedia.org/wiki/Kahan_summation_algorithm */ sum = 0.0; comp = 0.0; for (i = 0; i < nargs; i++) { t = DUK_FABS(duk_get_number(thr, i)) / max; summand = (t * t) - comp; prelim = sum + summand; comp = (prelim - sum) - summand; sum = prelim; } duk_push_number(thr, (duk_double_t) DUK_SQRT(sum) * max); return 1; } #endif /* DUK_USE_ES6 */ #if defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_math_object_sign(duk_hthread *thr) { duk_double_t d; d = duk_to_number(thr, 0); if (duk_double_is_nan(d)) { DUK_ASSERT(duk_is_nan(thr, -1)); return 1; /* NaN input -> return NaN */ } if (d == 0.0) { /* Zero sign kept, i.e. -0 -> -0, +0 -> +0. */ return 1; } duk_push_int(thr, (d > 0.0 ? 1 : -1)); return 1; } #endif /* DUK_USE_ES6 */ #if defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_math_object_clz32(duk_hthread *thr) { duk_uint32_t x; duk_small_uint_t i; #if defined(DUK_USE_PREFER_SIZE) duk_uint32_t mask; x = duk_to_uint32(thr, 0); for (i = 0, mask = 0x80000000UL; mask != 0; mask >>= 1) { if (x & mask) { break; } i++; } DUK_ASSERT(i <= 32); duk_push_uint(thr, i); return 1; #else /* DUK_USE_PREFER_SIZE */ i = 0; x = duk_to_uint32(thr, 0); if (x & 0xffff0000UL) { x >>= 16; } else { i += 16; } if (x & 0x0000ff00UL) { x >>= 8; } else { i += 8; } if (x & 0x000000f0UL) { x >>= 4; } else { i += 4; } if (x & 0x0000000cUL) { x >>= 2; } else { i += 2; } if (x & 0x00000002UL) { x >>= 1; } else { i += 1; } if (x & 0x00000001UL) { ; } else { i += 1; } DUK_ASSERT(i <= 32); duk_push_uint(thr, i); return 1; #endif /* DUK_USE_PREFER_SIZE */ } #endif /* DUK_USE_ES6 */ #if defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_math_object_imul(duk_hthread *thr) { duk_uint32_t x, y, z; x = duk_to_uint32(thr, 0); y = duk_to_uint32(thr, 1); z = x * y; /* While arguments are ToUint32() coerced and the multiplication * is unsigned as such, the final result is curiously interpreted * as a signed 32-bit value. */ duk_push_i32(thr, (duk_int32_t) z); return 1; } #endif /* DUK_USE_ES6 */ #endif /* DUK_USE_MATH_BUILTIN */ /* * Number built-ins */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_NUMBER_BUILTIN) DUK_LOCAL duk_double_t duk__push_this_number_plain(duk_hthread *thr) { duk_hobject *h; /* Number built-in accepts a plain number or a Number object (whose * internal value is operated on). Other types cause TypeError. */ duk_push_this(thr); if (duk_is_number(thr, -1)) { DUK_DDD(DUK_DDDPRINT("plain number value: %!T", (duk_tval *) duk_get_tval(thr, -1))); goto done; } h = duk_get_hobject(thr, -1); if (!h || (DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_NUMBER)) { DUK_DDD(DUK_DDDPRINT("unacceptable this value: %!T", (duk_tval *) duk_get_tval(thr, -1))); DUK_ERROR_TYPE(thr, "number expected"); DUK_WO_NORETURN(return 0.0;); } duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_VALUE); DUK_ASSERT(duk_is_number(thr, -1)); DUK_DDD(DUK_DDDPRINT("number object: %!T, internal value: %!T", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); duk_remove_m2(thr); done: return duk_get_number(thr, -1); } DUK_INTERNAL duk_ret_t duk_bi_number_constructor(duk_hthread *thr) { duk_idx_t nargs; duk_hobject *h_this; /* * The Number constructor uses ToNumber(arg) for number coercion * (coercing an undefined argument to NaN). However, if the * argument is not given at all, +0 must be used instead. To do * this, a vararg function is used. */ nargs = duk_get_top(thr); if (nargs == 0) { duk_push_int(thr, 0); } duk_to_number(thr, 0); duk_set_top(thr, 1); DUK_ASSERT_TOP(thr, 1); if (!duk_is_constructor_call(thr)) { return 1; } /* * E5 Section 15.7.2.1 requires that the constructed object * must have the original Number.prototype as its internal * prototype. However, since Number.prototype is non-writable * and non-configurable, this doesn't have to be enforced here: * The default object (bound to 'this') is OK, though we have * to change its class. * * Internal value set to ToNumber(arg) or +0; if no arg given, * ToNumber(undefined) = NaN, so special treatment is needed * (above). String internal value is immutable. */ /* XXX: helper */ duk_push_this(thr); h_this = duk_known_hobject(thr, -1); DUK_HOBJECT_SET_CLASS_NUMBER(h_this, DUK_HOBJECT_CLASS_NUMBER); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_this) == thr->builtins[DUK_BIDX_NUMBER_PROTOTYPE]); DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(h_this) == DUK_HOBJECT_CLASS_NUMBER); DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h_this)); duk_dup_0(thr); /* -> [ val obj val ] */ duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE); return 0; /* no return value -> don't replace created value */ } DUK_INTERNAL duk_ret_t duk_bi_number_prototype_value_of(duk_hthread *thr) { (void) duk__push_this_number_plain(thr); return 1; } DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_string(duk_hthread *thr) { duk_small_int_t radix; duk_small_uint_t n2s_flags; (void) duk__push_this_number_plain(thr); if (duk_is_undefined(thr, 0)) { radix = 10; } else { radix = (duk_small_int_t) duk_to_int_check_range(thr, 0, 2, 36); } DUK_DDD(DUK_DDDPRINT("radix=%ld", (long) radix)); n2s_flags = 0; duk_numconv_stringify(thr, radix /*radix*/, 0 /*digits*/, n2s_flags /*flags*/); return 1; } DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_locale_string(duk_hthread *thr) { /* XXX: just use toString() for now; permitted although not recommended. * nargs==1, so radix is passed to toString(). */ return duk_bi_number_prototype_to_string(thr); } /* * toFixed(), toExponential(), toPrecision() */ /* XXX: shared helper for toFixed(), toExponential(), toPrecision()? */ DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_fixed(duk_hthread *thr) { duk_small_int_t frac_digits; duk_double_t d; duk_small_int_t c; duk_small_uint_t n2s_flags; /* In ES5.1 frac_digits is coerced first; in ES2015 the 'this number * value' check is done first. */ d = duk__push_this_number_plain(thr); frac_digits = (duk_small_int_t) duk_to_int_check_range(thr, 0, 0, 20); c = (duk_small_int_t) DUK_FPCLASSIFY(d); if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) { goto use_to_string; } if (d >= 1.0e21 || d <= -1.0e21) { goto use_to_string; } n2s_flags = DUK_N2S_FLAG_FIXED_FORMAT | DUK_N2S_FLAG_FRACTION_DIGITS; duk_numconv_stringify(thr, 10 /*radix*/, frac_digits /*digits*/, n2s_flags /*flags*/); return 1; use_to_string: DUK_ASSERT_TOP(thr, 2); duk_to_string(thr, -1); return 1; } DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_exponential(duk_hthread *thr) { duk_bool_t frac_undefined; duk_small_int_t frac_digits; duk_double_t d; duk_small_int_t c; duk_small_uint_t n2s_flags; d = duk__push_this_number_plain(thr); frac_undefined = duk_is_undefined(thr, 0); duk_to_int(thr, 0); /* for side effects */ c = (duk_small_int_t) DUK_FPCLASSIFY(d); if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) { goto use_to_string; } frac_digits = (duk_small_int_t) duk_to_int_check_range(thr, 0, 0, 20); n2s_flags = DUK_N2S_FLAG_FORCE_EXP | (frac_undefined ? 0 : DUK_N2S_FLAG_FIXED_FORMAT); duk_numconv_stringify(thr, 10 /*radix*/, frac_digits + 1 /*leading digit + fractions*/, n2s_flags /*flags*/); return 1; use_to_string: DUK_ASSERT_TOP(thr, 2); duk_to_string(thr, -1); return 1; } DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_precision(duk_hthread *thr) { /* The specification has quite awkward order of coercion and * checks for toPrecision(). The operations below are a bit * reordered, within constraints of observable side effects. */ duk_double_t d; duk_small_int_t prec; duk_small_int_t c; duk_small_uint_t n2s_flags; DUK_ASSERT_TOP(thr, 1); d = duk__push_this_number_plain(thr); if (duk_is_undefined(thr, 0)) { goto use_to_string; } DUK_ASSERT_TOP(thr, 2); duk_to_int(thr, 0); /* for side effects */ c = (duk_small_int_t) DUK_FPCLASSIFY(d); if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) { goto use_to_string; } prec = (duk_small_int_t) duk_to_int_check_range(thr, 0, 1, 21); n2s_flags = DUK_N2S_FLAG_FIXED_FORMAT | DUK_N2S_FLAG_NO_ZERO_PAD; duk_numconv_stringify(thr, 10 /*radix*/, prec /*digits*/, n2s_flags /*flags*/); return 1; use_to_string: /* Used when precision is undefined; also used for NaN (-> "NaN"), * and +/- infinity (-> "Infinity", "-Infinity"). */ DUK_ASSERT_TOP(thr, 2); duk_to_string(thr, -1); return 1; } /* * ES2015 isFinite() etc */ #if defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_number_check_shared(duk_hthread *thr) { duk_int_t magic; duk_bool_t ret = 0; if (duk_is_number(thr, 0)) { duk_double_t d; magic = duk_get_current_magic(thr); d = duk_get_number(thr, 0); switch (magic) { case 0: /* isFinite() */ ret = duk_double_is_finite(d); break; case 1: /* isInteger() */ ret = duk_double_is_integer(d); break; case 2: /* isNaN() */ ret = duk_double_is_nan(d); break; default: /* isSafeInteger() */ DUK_ASSERT(magic == 3); ret = duk_double_is_safe_integer(d); } } duk_push_boolean(thr, ret); return 1; } #endif /* DUK_USE_ES6 */ #endif /* DUK_USE_NUMBER_BUILTIN */ /* * Object built-ins */ /* #include duk_internal.h -> already included */ /* Needed even when Object built-in disabled. */ DUK_INTERNAL duk_ret_t duk_bi_object_prototype_to_string(duk_hthread *thr) { duk_tval *tv; tv = DUK_HTHREAD_THIS_PTR(thr); duk_push_class_string_tval(thr, tv, 0 /*avoid_side_effects*/); return 1; } #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_constructor(duk_hthread *thr) { duk_uint_t arg_mask; arg_mask = duk_get_type_mask(thr, 0); if (!duk_is_constructor_call(thr) && /* not a constructor call */ ((arg_mask & (DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_UNDEFINED)) == 0)) { /* and argument not null or undefined */ duk_to_object(thr, 0); return 1; } /* Pointer and buffer primitive values are treated like other * primitives values which have a fully fledged object counterpart: * promote to an object value. Lightfuncs and plain buffers are * coerced with ToObject() even they could also be returned as is. */ if (arg_mask & (DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_STRING | DUK_TYPE_MASK_BOOLEAN | DUK_TYPE_MASK_NUMBER | DUK_TYPE_MASK_POINTER | DUK_TYPE_MASK_BUFFER | DUK_TYPE_MASK_LIGHTFUNC)) { /* For DUK_TYPE_OBJECT the coercion is a no-op and could * be checked for explicitly, but Object(obj) calls are * not very common so opt for minimal footprint. */ duk_to_object(thr, 0); return 1; } (void) duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT), DUK_BIDX_OBJECT_PROTOTYPE); return 1; } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) && defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_assign(duk_hthread *thr) { duk_idx_t nargs; duk_int_t idx; nargs = duk_get_top_require_min(thr, 1 /*min_top*/); duk_to_object(thr, 0); for (idx = 1; idx < nargs; idx++) { /* E7 19.1.2.1 (step 4a) */ if (duk_is_null_or_undefined(thr, idx)) { continue; } /* duk_enum() respects ES2015+ [[OwnPropertyKeys]] ordering, which is * convenient here. */ duk_to_object(thr, idx); duk_enum(thr, idx, DUK_ENUM_OWN_PROPERTIES_ONLY); while (duk_next(thr, -1, 1 /*get_value*/)) { /* [ target ... enum key value ] */ duk_put_prop(thr, 0); /* [ target ... enum ] */ } /* Could pop enumerator, but unnecessary because of duk_set_top() * below. */ } duk_set_top(thr, 1); return 1; } #endif #if defined(DUK_USE_OBJECT_BUILTIN) && defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_is(duk_hthread *thr) { DUK_ASSERT_TOP(thr, 2); duk_push_boolean(thr, duk_samevalue(thr, 0, 1)); return 1; } #endif #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_create(duk_hthread *thr) { duk_hobject *proto; DUK_ASSERT_TOP(thr, 2); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) duk_hbufobj_promote_plain(thr, 0); #endif proto = duk_require_hobject_accept_mask(thr, 0, DUK_TYPE_MASK_NULL); DUK_ASSERT(proto != NULL || duk_is_null(thr, 0)); (void) duk_push_object_helper_proto(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT), proto); if (!duk_is_undefined(thr, 1)) { /* [ O Properties obj ] */ duk_replace(thr, 0); /* [ obj Properties ] */ /* Just call the "original" Object.defineProperties() to * finish up. */ return duk_bi_object_constructor_define_properties(thr); } /* [ O Properties obj ] */ return 1; } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_define_properties(duk_hthread *thr) { duk_small_uint_t pass; duk_uint_t defprop_flags; duk_hobject *obj; duk_idx_t idx_value; duk_hobject *get; duk_hobject *set; /* Lightfunc and plain buffer handling by ToObject() coercion. */ obj = duk_require_hobject_promote_mask(thr, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); DUK_ASSERT(obj != NULL); duk_to_object(thr, 1); /* properties object */ DUK_DDD(DUK_DDDPRINT("target=%!iT, properties=%!iT", (duk_tval *) duk_get_tval(thr, 0), (duk_tval *) duk_get_tval(thr, 1))); /* * Two pass approach to processing the property descriptors. * On first pass validate and normalize all descriptors before * any changes are made to the target object. On second pass * make the actual modifications to the target object. * * Right now we'll just use the same normalize/validate helper * on both passes, ignoring its outputs on the first pass. */ for (pass = 0; pass < 2; pass++) { duk_set_top(thr, 2); /* -> [ hobject props ] */ duk_enum(thr, 1, DUK_ENUM_OWN_PROPERTIES_ONLY | DUK_ENUM_INCLUDE_SYMBOLS /*enum_flags*/); for (;;) { duk_hstring *key; /* [ hobject props enum(props) ] */ duk_set_top(thr, 3); if (!duk_next(thr, 2, 1 /*get_value*/)) { break; } DUK_DDD(DUK_DDDPRINT("-> key=%!iT, desc=%!iT", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); /* [ hobject props enum(props) key desc ] */ duk_hobject_prepare_property_descriptor(thr, 4 /*idx_desc*/, &defprop_flags, &idx_value, &get, &set); /* [ hobject props enum(props) key desc [multiple values] ] */ if (pass == 0) { continue; } /* This allows symbols on purpose. */ key = duk_known_hstring(thr, 3); DUK_ASSERT(key != NULL); duk_hobject_define_property_helper(thr, defprop_flags, obj, key, idx_value, get, set, 1 /*throw_flag*/); } } /* * Return target object */ duk_dup_0(thr); return 1; } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_seal_freeze_shared(duk_hthread *thr) { DUK_ASSERT_TOP(thr, 1); duk_seal_freeze_raw(thr, 0, (duk_bool_t) duk_get_current_magic(thr) /*is_freeze*/); return 1; } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_is_sealed_frozen_shared(duk_hthread *thr) { duk_hobject *h; duk_bool_t is_frozen; duk_uint_t mask; is_frozen = (duk_bool_t) duk_get_current_magic(thr); mask = duk_get_type_mask(thr, 0); if (mask & (DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER)) { DUK_ASSERT(is_frozen == 0 || is_frozen == 1); duk_push_boolean(thr, (mask & DUK_TYPE_MASK_LIGHTFUNC) ? 1 : /* lightfunc always frozen and sealed */ (is_frozen ^ 1)); /* buffer sealed but not frozen (index props writable) */ } else { /* ES2015 Sections 19.1.2.12, 19.1.2.13: anything other than an object * is considered to be already sealed and frozen. */ h = duk_get_hobject(thr, 0); duk_push_boolean(thr, (h == NULL) || duk_hobject_object_is_sealed_frozen_helper(thr, h, is_frozen /*is_frozen*/)); } return 1; } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_prototype_to_locale_string(duk_hthread *thr) { DUK_ASSERT_TOP(thr, 0); (void) duk_push_this_coercible_to_object(thr); duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_TO_STRING); #if 0 /* This is mentioned explicitly in the E5.1 spec, but duk_call_method() checks for it in practice. */ duk_require_callable(thr, 1); #endif duk_dup_0(thr); /* -> [ O toString O ] */ duk_call_method(thr, 0); /* XXX: call method tail call? */ return 1; } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_prototype_value_of(duk_hthread *thr) { /* For lightfuncs and plain buffers, returns Object() coerced. */ (void) duk_push_this_coercible_to_object(thr); return 1; } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_prototype_is_prototype_of(duk_hthread *thr) { duk_hobject *h_v; duk_hobject *h_obj; DUK_ASSERT_TOP(thr, 1); h_v = duk_get_hobject(thr, 0); if (!h_v) { duk_push_false(thr); /* XXX: tail call: return duk_push_false(thr) */ return 1; } h_obj = duk_push_this_coercible_to_object(thr); DUK_ASSERT(h_obj != NULL); /* E5.1 Section 15.2.4.6, step 3.a, lookup proto once before compare. * Prototype loops should cause an error to be thrown. */ duk_push_boolean(thr, duk_hobject_prototype_chain_contains(thr, DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_v), h_obj, 0 /*ignore_loop*/)); return 1; } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_prototype_has_own_property(duk_hthread *thr) { return (duk_ret_t) duk_hobject_object_ownprop_helper(thr, 0 /*required_desc_flags*/); } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_prototype_property_is_enumerable(duk_hthread *thr) { return (duk_ret_t) duk_hobject_object_ownprop_helper(thr, DUK_PROPDESC_FLAG_ENUMERABLE /*required_desc_flags*/); } #endif /* DUK_USE_OBJECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) || defined(DUK_USE_REFLECT_BUILTIN) /* Shared helper to implement Object.getPrototypeOf, * Object.prototype.__proto__ getter, and Reflect.getPrototypeOf. * * http://www.ecma-international.org/ecma-262/6.0/index.html#sec-get-object.prototype.__proto__ */ DUK_INTERNAL duk_ret_t duk_bi_object_getprototype_shared(duk_hthread *thr) { /* * magic = 0: __proto__ getter * magic = 1: Object.getPrototypeOf() * magic = 2: Reflect.getPrototypeOf() */ duk_hobject *h; duk_hobject *proto; duk_tval *tv; duk_int_t magic; magic = duk_get_current_magic(thr); if (magic == 0) { DUK_ASSERT_TOP(thr, 0); duk_push_this_coercible_to_object(thr); } DUK_ASSERT(duk_get_top(thr) >= 1); if (magic < 2) { /* ES2015 Section 19.1.2.9, step 1 */ duk_to_object(thr, 0); } tv = DUK_GET_TVAL_POSIDX(thr, 0); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_BUFFER: proto = thr->builtins[DUK_BIDX_UINT8ARRAY_PROTOTYPE]; break; case DUK_TAG_LIGHTFUNC: proto = thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]; break; case DUK_TAG_OBJECT: h = DUK_TVAL_GET_OBJECT(tv); proto = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h); break; default: /* This implicitly handles CheckObjectCoercible() caused * TypeError. */ DUK_DCERROR_TYPE_INVALID_ARGS(thr); } if (proto != NULL) { duk_push_hobject(thr, proto); } else { duk_push_null(thr); } return 1; } #endif /* DUK_USE_OBJECT_BUILTIN || DUK_USE_REFLECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) || defined(DUK_USE_REFLECT_BUILTIN) /* Shared helper to implement ES2015 Object.setPrototypeOf, * Object.prototype.__proto__ setter, and Reflect.setPrototypeOf. * * http://www.ecma-international.org/ecma-262/6.0/index.html#sec-get-object.prototype.__proto__ * http://www.ecma-international.org/ecma-262/6.0/index.html#sec-object.setprototypeof */ DUK_INTERNAL duk_ret_t duk_bi_object_setprototype_shared(duk_hthread *thr) { /* * magic = 0: __proto__ setter * magic = 1: Object.setPrototypeOf() * magic = 2: Reflect.setPrototypeOf() */ duk_hobject *h_obj; duk_hobject *h_new_proto; duk_hobject *h_curr; duk_ret_t ret_success = 1; /* retval for success path */ duk_uint_t mask; duk_int_t magic; /* Preliminaries for __proto__ and setPrototypeOf (E6 19.1.2.18 steps 1-4). */ magic = duk_get_current_magic(thr); if (magic == 0) { duk_push_this_check_object_coercible(thr); duk_insert(thr, 0); if (!duk_check_type_mask(thr, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT)) { return 0; } /* __proto__ setter returns 'undefined' on success unlike the * setPrototypeOf() call which returns the target object. */ ret_success = 0; } else { if (magic == 1) { duk_require_object_coercible(thr, 0); } else { duk_require_hobject_accept_mask(thr, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); } duk_require_type_mask(thr, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT); } h_new_proto = duk_get_hobject(thr, 1); /* h_new_proto may be NULL */ mask = duk_get_type_mask(thr, 0); if (mask & (DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER)) { duk_hobject *curr_proto; curr_proto = thr->builtins[(mask & DUK_TYPE_MASK_LIGHTFUNC) ? DUK_BIDX_FUNCTION_PROTOTYPE : DUK_BIDX_UINT8ARRAY_PROTOTYPE]; if (h_new_proto == curr_proto) { goto skip; } goto fail_nonextensible; } h_obj = duk_get_hobject(thr, 0); if (h_obj == NULL) { goto skip; } DUK_ASSERT(h_obj != NULL); /* [[SetPrototypeOf]] standard behavior, E6 9.1.2. */ /* TODO: implement Proxy object support here */ if (h_new_proto == DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_obj)) { goto skip; } if (!DUK_HOBJECT_HAS_EXTENSIBLE(h_obj)) { goto fail_nonextensible; } for (h_curr = h_new_proto; h_curr != NULL; h_curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_curr)) { /* Loop prevention. */ if (h_curr == h_obj) { goto fail_loop; } } DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h_obj, h_new_proto); /* fall thru */ skip: duk_set_top(thr, 1); if (magic == 2) { duk_push_true(thr); } return ret_success; fail_nonextensible: fail_loop: if (magic != 2) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } else { duk_push_false(thr); return 1; } } #endif /* DUK_USE_OBJECT_BUILTIN || DUK_USE_REFLECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) || defined(DUK_USE_REFLECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_define_property(duk_hthread *thr) { /* * magic = 0: Object.defineProperty() * magic = 1: Reflect.defineProperty() */ duk_hobject *obj; duk_hstring *key; duk_hobject *get; duk_hobject *set; duk_idx_t idx_value; duk_uint_t defprop_flags; duk_small_uint_t magic; duk_bool_t throw_flag; duk_bool_t ret; DUK_ASSERT(thr != NULL); DUK_DDD(DUK_DDDPRINT("Object.defineProperty(): ctx=%p obj=%!T key=%!T desc=%!T", (void *) thr, (duk_tval *) duk_get_tval(thr, 0), (duk_tval *) duk_get_tval(thr, 1), (duk_tval *) duk_get_tval(thr, 2))); /* [ obj key desc ] */ magic = (duk_small_uint_t) duk_get_current_magic(thr); /* Lightfuncs are currently supported by coercing to a temporary * Function object; changes will be allowed (the coerced value is * extensible) but will be lost. Same for plain buffers. */ obj = duk_require_hobject_promote_mask(thr, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); DUK_ASSERT(obj != NULL); key = duk_to_property_key_hstring(thr, 1); (void) duk_require_hobject(thr, 2); DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT(duk_get_hobject(thr, 2) != NULL); /* * Validate and convert argument property descriptor (an ECMAScript * object) into a set of defprop_flags and possibly property value, * getter, and/or setter values on the value stack. * * Lightfunc set/get values are coerced to full Functions. */ duk_hobject_prepare_property_descriptor(thr, 2 /*idx_desc*/, &defprop_flags, &idx_value, &get, &set); /* * Use Object.defineProperty() helper for the actual operation. */ DUK_ASSERT(magic == 0U || magic == 1U); throw_flag = magic ^ 1U; ret = duk_hobject_define_property_helper(thr, defprop_flags, obj, key, idx_value, get, set, throw_flag); /* Ignore the normalize/validate helper outputs on the value stack, * they're popped automatically. */ if (magic == 0U) { /* Object.defineProperty(): return target object. */ duk_push_hobject(thr, obj); } else { /* Reflect.defineProperty(): return success/fail. */ duk_push_boolean(thr, ret); } return 1; } #endif /* DUK_USE_OBJECT_BUILTIN || DUK_USE_REFLECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) || defined(DUK_USE_REFLECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_get_own_property_descriptor(duk_hthread *thr) { DUK_ASSERT_TOP(thr, 2); /* ES2015 Section 19.1.2.6, step 1 */ if (duk_get_current_magic(thr) == 0) { duk_to_object(thr, 0); } /* [ obj key ] */ duk_hobject_object_get_own_property_descriptor(thr, -2); return 1; } #endif /* DUK_USE_OBJECT_BUILTIN || DUK_USE_REFLECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) || defined(DUK_USE_REFLECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_is_extensible(duk_hthread *thr) { /* * magic = 0: Object.isExtensible() * magic = 1: Reflect.isExtensible() */ duk_hobject *h; if (duk_get_current_magic(thr) == 0) { h = duk_get_hobject(thr, 0); } else { /* Reflect.isExtensible(): throw if non-object, but we accept lightfuncs * and plain buffers here because they pretend to be objects. */ h = duk_require_hobject_accept_mask(thr, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); } duk_push_boolean(thr, (h != NULL) && DUK_HOBJECT_HAS_EXTENSIBLE(h)); return 1; } #endif /* DUK_USE_OBJECT_BUILTIN || DUK_USE_REFLECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) || defined(DUK_USE_REFLECT_BUILTIN) /* Shared helper for various key/symbol listings, magic: * 0=Object.keys() * 1=Object.getOwnPropertyNames(), * 2=Object.getOwnPropertySymbols(), * 3=Reflect.ownKeys() */ DUK_LOCAL const duk_small_uint_t duk__object_keys_enum_flags[4] = { /* Object.keys() */ DUK_ENUM_OWN_PROPERTIES_ONLY | DUK_ENUM_NO_PROXY_BEHAVIOR, /* Object.getOwnPropertyNames() */ DUK_ENUM_INCLUDE_NONENUMERABLE | DUK_ENUM_OWN_PROPERTIES_ONLY | DUK_ENUM_NO_PROXY_BEHAVIOR, /* Object.getOwnPropertySymbols() */ DUK_ENUM_INCLUDE_SYMBOLS | DUK_ENUM_OWN_PROPERTIES_ONLY | DUK_ENUM_EXCLUDE_STRINGS | DUK_ENUM_INCLUDE_NONENUMERABLE | DUK_ENUM_NO_PROXY_BEHAVIOR, /* Reflect.ownKeys() */ DUK_ENUM_INCLUDE_SYMBOLS | DUK_ENUM_OWN_PROPERTIES_ONLY | DUK_ENUM_INCLUDE_NONENUMERABLE | DUK_ENUM_NO_PROXY_BEHAVIOR }; DUK_INTERNAL duk_ret_t duk_bi_object_constructor_keys_shared(duk_hthread *thr) { duk_hobject *obj; #if defined(DUK_USE_ES6_PROXY) duk_hobject *h_proxy_target; duk_hobject *h_proxy_handler; duk_hobject *h_trap_result; #endif duk_small_uint_t enum_flags; duk_int_t magic; DUK_ASSERT_TOP(thr, 1); magic = duk_get_current_magic(thr); if (magic == 3) { /* ES2015 Section 26.1.11 requires a TypeError for non-objects. Lightfuncs * and plain buffers pretend to be objects, so accept those too. */ obj = duk_require_hobject_promote_mask(thr, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); } else { /* ES2015: ToObject coerce. */ obj = duk_to_hobject(thr, 0); } DUK_ASSERT(obj != NULL); DUK_UNREF(obj); /* XXX: proxy chains */ #if defined(DUK_USE_ES6_PROXY) /* XXX: better sharing of code between proxy target call sites */ if (DUK_LIKELY(!duk_hobject_proxy_check(obj, &h_proxy_target, &h_proxy_handler))) { goto skip_proxy; } duk_push_hobject(thr, h_proxy_handler); if (!duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_OWN_KEYS)) { /* Careful with reachability here: don't pop 'obj' before pushing * proxy target. */ DUK_DDD(DUK_DDDPRINT("no ownKeys trap, get keys of target instead")); duk_pop_2(thr); duk_push_hobject(thr, h_proxy_target); duk_replace(thr, 0); DUK_ASSERT_TOP(thr, 1); goto skip_proxy; } /* [ obj handler trap ] */ duk_insert(thr, -2); duk_push_hobject(thr, h_proxy_target); /* -> [ obj trap handler target ] */ duk_call_method(thr, 1 /*nargs*/); /* -> [ obj trap_result ] */ h_trap_result = duk_require_hobject(thr, -1); DUK_UNREF(h_trap_result); magic = duk_get_current_magic(thr); DUK_ASSERT(magic >= 0 && magic < (duk_int_t) (sizeof(duk__object_keys_enum_flags) / sizeof(duk_small_uint_t))); enum_flags = duk__object_keys_enum_flags[magic]; duk_proxy_ownkeys_postprocess(thr, h_proxy_target, enum_flags); return 1; skip_proxy: #endif /* DUK_USE_ES6_PROXY */ DUK_ASSERT_TOP(thr, 1); magic = duk_get_current_magic(thr); DUK_ASSERT(magic >= 0 && magic < (duk_int_t) (sizeof(duk__object_keys_enum_flags) / sizeof(duk_small_uint_t))); enum_flags = duk__object_keys_enum_flags[magic]; return duk_hobject_get_enumerated_keys(thr, enum_flags); } #endif /* DUK_USE_OBJECT_BUILTIN || DUK_USE_REFLECT_BUILTIN */ #if defined(DUK_USE_OBJECT_BUILTIN) || defined(DUK_USE_REFLECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_object_constructor_prevent_extensions(duk_hthread *thr) { /* * magic = 0: Object.preventExtensions() * magic = 1: Reflect.preventExtensions() */ duk_hobject *h; duk_uint_t mask; duk_int_t magic; magic = duk_get_current_magic(thr); /* Silent success for lightfuncs and plain buffers always. */ mask = DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER; /* Object.preventExtensions() silent success for non-object. */ if (magic == 0) { mask |= DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_BOOLEAN | DUK_TYPE_MASK_NUMBER | DUK_TYPE_MASK_STRING | DUK_TYPE_MASK_POINTER; } if (duk_check_type_mask(thr, 0, mask)) { /* Not an object, already non-extensible so always success. */ goto done; } h = duk_require_hobject(thr, 0); DUK_ASSERT(h != NULL); DUK_HOBJECT_CLEAR_EXTENSIBLE(h); /* A non-extensible object cannot gain any more properties, * so this is a good time to compact. */ duk_hobject_compact_props(thr, h); done: if (magic == 1) { duk_push_true(thr); } return 1; } #endif /* DUK_USE_OBJECT_BUILTIN || DUK_USE_REFLECT_BUILTIN */ /* * __defineGetter__, __defineSetter__, __lookupGetter__, __lookupSetter__ */ #if defined(DUK_USE_ES8) DUK_INTERNAL duk_ret_t duk_bi_object_prototype_defineaccessor(duk_hthread *thr) { duk_push_this(thr); duk_insert(thr, 0); duk_to_object(thr, 0); duk_require_callable(thr, 2); /* [ ToObject(this) key getter/setter ] */ /* ToPropertyKey() coercion is not needed, duk_def_prop() does it. */ duk_def_prop(thr, 0, DUK_DEFPROP_SET_ENUMERABLE | DUK_DEFPROP_SET_CONFIGURABLE | (duk_get_current_magic(thr) ? DUK_DEFPROP_HAVE_SETTER : DUK_DEFPROP_HAVE_GETTER)); return 0; } DUK_INTERNAL duk_ret_t duk_bi_object_prototype_lookupaccessor(duk_hthread *thr) { duk_uint_t sanity; duk_push_this(thr); duk_to_object(thr, -1); /* XXX: Prototype walk (with sanity) should be a core property * operation, could add a flag to e.g. duk_get_prop_desc(). */ /* ToPropertyKey() coercion is not needed, duk_get_prop_desc() does it. */ sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY; while (!duk_is_undefined(thr, -1)) { /* [ key obj ] */ duk_dup(thr, 0); duk_get_prop_desc(thr, 1, 0 /*flags*/); if (!duk_is_undefined(thr, -1)) { duk_get_prop_stridx(thr, -1, (duk_get_current_magic(thr) != 0 ? DUK_STRIDX_SET : DUK_STRIDX_GET)); return 1; } duk_pop(thr); if (DUK_UNLIKELY(sanity-- == 0)) { DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT); DUK_WO_NORETURN(return 0;); } duk_get_prototype(thr, -1); duk_remove(thr, -2); } return 1; } #endif /* DUK_USE_ES8 */ /* * High resolution time API (performance.now() et al) * * API specification: https://encoding.spec.whatwg.org/#ap://www.w3.org/TR/hr-time/ */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_PERFORMANCE_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_performance_now(duk_hthread *thr) { /* From API spec: * The DOMHighResTimeStamp type is used to store a time value in * milliseconds, measured relative from the time origin, global * monotonic clock, or a time value that represents a duration * between two DOMHighResTimeStamp's. */ duk_push_number(thr, duk_time_get_monotonic_time(thr)); return 1; } #if 0 /* Missing until semantics decided. */ DUK_INTERNAL duk_ret_t duk_bi_performance_timeorigin_getter(duk_hthread *thr) { /* No decision yet how to handle timeOrigins, e.g. should one be * initialized per heap, or per global object set. See * https://www.w3.org/TR/hr-time/#time-origin. */ duk_push_uint(thr, 0); return 1; } #endif /* 0 */ #endif /* DUK_USE_PERFORMANCE_BUILTIN */ /* * Pointer built-ins */ /* #include duk_internal.h -> already included */ /* * Constructor */ DUK_INTERNAL duk_ret_t duk_bi_pointer_constructor(duk_hthread *thr) { /* XXX: this behavior is quite useless now; it would be nice to be able * to create pointer values from e.g. numbers or strings. Numbers are * problematic on 64-bit platforms though. Hex encoded strings? */ if (duk_get_top(thr) == 0) { duk_push_pointer(thr, NULL); } else { duk_to_pointer(thr, 0); } DUK_ASSERT(duk_is_pointer(thr, 0)); duk_set_top(thr, 1); if (duk_is_constructor_call(thr)) { (void) duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_POINTER), DUK_BIDX_POINTER_PROTOTYPE); /* Pointer object internal value is immutable. */ duk_dup_0(thr); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE); } /* Note: unbalanced stack on purpose */ return 1; } /* * toString(), valueOf() */ DUK_INTERNAL duk_ret_t duk_bi_pointer_prototype_tostring_shared(duk_hthread *thr) { duk_tval *tv; duk_small_int_t to_string = duk_get_current_magic(thr); duk_push_this(thr); tv = duk_require_tval(thr, -1); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_POINTER(tv)) { /* nop */ } else if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); /* Must be a "pointer object", i.e. class "Pointer" */ if (DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_POINTER) { goto type_error; } duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_VALUE); } else { goto type_error; } if (to_string) { duk_to_string(thr, -1); } return 1; type_error: DUK_DCERROR_TYPE_INVALID_ARGS(thr); } /* * Promise built-in */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_PROMISE_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_promise_constructor(duk_hthread *thr) { DUK_ERROR_TYPE(thr, "unimplemented"); DUK_WO_NORETURN(return 0;); } DUK_INTERNAL duk_ret_t duk_bi_promise_all(duk_hthread *thr) { DUK_ERROR_TYPE(thr, "unimplemented"); DUK_WO_NORETURN(return 0;); } DUK_INTERNAL duk_ret_t duk_bi_promise_race(duk_hthread *thr) { DUK_ERROR_TYPE(thr, "unimplemented"); DUK_WO_NORETURN(return 0;); } DUK_INTERNAL duk_ret_t duk_bi_promise_reject(duk_hthread *thr) { DUK_ERROR_TYPE(thr, "unimplemented"); DUK_WO_NORETURN(return 0;); } DUK_INTERNAL duk_ret_t duk_bi_promise_resolve(duk_hthread *thr) { DUK_ERROR_TYPE(thr, "unimplemented"); DUK_WO_NORETURN(return 0;); } DUK_INTERNAL duk_ret_t duk_bi_promise_catch(duk_hthread *thr) { DUK_ERROR_TYPE(thr, "unimplemented"); DUK_WO_NORETURN(return 0;); } DUK_INTERNAL duk_ret_t duk_bi_promise_then(duk_hthread *thr) { DUK_ERROR_TYPE(thr, "unimplemented"); DUK_WO_NORETURN(return 0;); } #endif /* DUK_USE_PROMISE_BUILTIN */ /* * Proxy built-in (ES2015) */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_ES6_PROXY) /* Post-process a Proxy ownKeys() result at stack top. Push a cleaned up * array of valid result keys (strings or symbols). TypeError for invalid * values. Flags are shared with duk_enum(). */ DUK_INTERNAL void duk_proxy_ownkeys_postprocess(duk_hthread *thr, duk_hobject *h_proxy_target, duk_uint_t flags) { duk_uarridx_t i, len, idx; duk_propdesc desc; DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(h_proxy_target != NULL); len = (duk_uarridx_t) duk_get_length(thr, -1); idx = 0; duk_push_array(thr); /* XXX: preallocated dense array, fill in directly */ for (i = 0; i < len; i++) { duk_hstring *h; /* [ obj trap_result res_arr ] */ (void) duk_get_prop_index(thr, -2, i); h = duk_get_hstring(thr, -1); if (h == NULL) { DUK_ERROR_TYPE_INVALID_TRAP_RESULT(thr); DUK_WO_NORETURN(return;); } if (!(flags & DUK_ENUM_INCLUDE_NONENUMERABLE)) { /* No support for 'getOwnPropertyDescriptor' trap yet, * so check enumerability always from target object * descriptor. */ if (duk_hobject_get_own_propdesc(thr, h_proxy_target, duk_known_hstring(thr, -1), &desc, 0 /*flags*/)) { if ((desc.flags & DUK_PROPDESC_FLAG_ENUMERABLE) == 0) { DUK_DDD(DUK_DDDPRINT("ignore non-enumerable property: %!T", duk_get_tval(thr, -1))); goto skip_key; } } else { DUK_DDD(DUK_DDDPRINT("ignore non-existent property: %!T", duk_get_tval(thr, -1))); goto skip_key; } } if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { if (!(flags & DUK_ENUM_INCLUDE_SYMBOLS)) { DUK_DDD(DUK_DDDPRINT("ignore symbol property: %!T", duk_get_tval(thr, -1))); goto skip_key; } if (DUK_HSTRING_HAS_HIDDEN(h) && !(flags & DUK_ENUM_INCLUDE_HIDDEN)) { DUK_DDD(DUK_DDDPRINT("ignore hidden symbol property: %!T", duk_get_tval(thr, -1))); goto skip_key; } } else { if (flags & DUK_ENUM_EXCLUDE_STRINGS) { DUK_DDD(DUK_DDDPRINT("ignore string property: %!T", duk_get_tval(thr, -1))); goto skip_key; } } /* [ obj trap_result res_arr propname ] */ duk_put_prop_index(thr, -2, idx++); continue; skip_key: duk_pop(thr); continue; } /* XXX: Missing trap result validation for non-configurable target keys * (must be present), for non-extensible target all target keys must be * present and no extra keys can be present. * http://www.ecma-international.org/ecma-262/6.0/#sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys */ /* XXX: The key enumerability check should trigger the "getOwnPropertyDescriptor" * trap which has not yet been implemented. In the absence of such a trap, * the enumerability should be checked from the target object; this is * handled above. */ } #endif /* DUK_USE_ES6_PROXY */ #if defined(DUK_USE_ES6_PROXY) DUK_INTERNAL duk_ret_t duk_bi_proxy_constructor(duk_hthread *thr) { DUK_ASSERT_TOP(thr, 2); /* [ target handler ] */ duk_require_constructor_call(thr); duk_push_proxy(thr, 0 /*flags*/); /* [ target handler ] -> [ proxy ] */ return 1; /* replacement */ } #endif /* DUK_USE_ES6_PROXY */ /* * 'Reflect' built-in (ES2016 Section 26.1) * http://www.ecma-international.org/ecma-262/7.0/#sec-reflect-object * * Many Reflect built-in functions are provided by shared helpers in * duk_bi_object.c or duk_bi_function.c. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_REFLECT_BUILTIN) DUK_INTERNAL duk_ret_t duk_bi_reflect_object_delete_property(duk_hthread *thr) { duk_tval *tv_obj; duk_tval *tv_key; duk_bool_t ret; DUK_ASSERT_TOP(thr, 2); (void) duk_require_hobject(thr, 0); (void) duk_to_string(thr, 1); /* [ target key ] */ DUK_ASSERT(thr != NULL); tv_obj = DUK_GET_TVAL_POSIDX(thr, 0); tv_key = DUK_GET_TVAL_POSIDX(thr, 1); ret = duk_hobject_delprop(thr, tv_obj, tv_key, 0 /*throw_flag*/); duk_push_boolean(thr, ret); return 1; } DUK_INTERNAL duk_ret_t duk_bi_reflect_object_get(duk_hthread *thr) { duk_tval *tv_obj; duk_tval *tv_key; duk_idx_t nargs; DUK_ASSERT(thr != NULL); nargs = duk_get_top_require_min(thr, 2 /*min_top*/); (void) duk_require_hobject(thr, 0); (void) duk_to_string(thr, 1); if (nargs >= 3 && !duk_strict_equals(thr, 0, 2)) { /* XXX: [[Get]] receiver currently unsupported */ DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return 0;); } /* [ target key receiver? ...? ] */ tv_obj = DUK_GET_TVAL_POSIDX(thr, 0); tv_key = DUK_GET_TVAL_POSIDX(thr, 1); (void) duk_hobject_getprop(thr, tv_obj, tv_key); /* This could also be a duk_get_prop(). */ return 1; } DUK_INTERNAL duk_ret_t duk_bi_reflect_object_has(duk_hthread *thr) { duk_tval *tv_obj; duk_tval *tv_key; duk_bool_t ret; DUK_ASSERT(thr != NULL); DUK_ASSERT_TOP(thr, 2); (void) duk_require_hobject(thr, 0); (void) duk_to_string(thr, 1); /* [ target key ] */ tv_obj = DUK_GET_TVAL_POSIDX(thr, 0); tv_key = DUK_GET_TVAL_POSIDX(thr, 1); ret = duk_hobject_hasprop(thr, tv_obj, tv_key); duk_push_boolean(thr, ret); return 1; } DUK_INTERNAL duk_ret_t duk_bi_reflect_object_set(duk_hthread *thr) { duk_tval *tv_obj; duk_tval *tv_key; duk_tval *tv_val; duk_idx_t nargs; duk_bool_t ret; DUK_ASSERT(thr != NULL); nargs = duk_get_top_require_min(thr, 3 /*min_top*/); (void) duk_require_hobject(thr, 0); (void) duk_to_string(thr, 1); if (nargs >= 4 && !duk_strict_equals(thr, 0, 3)) { /* XXX: [[Set]] receiver currently unsupported */ DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return 0;); } /* [ target key value receiver? ...? ] */ tv_obj = DUK_GET_TVAL_POSIDX(thr, 0); tv_key = DUK_GET_TVAL_POSIDX(thr, 1); tv_val = DUK_GET_TVAL_POSIDX(thr, 2); ret = duk_hobject_putprop(thr, tv_obj, tv_key, tv_val, 0 /*throw_flag*/); duk_push_boolean(thr, ret); return 1; } #endif /* DUK_USE_REFLECT_BUILTIN */ /* * RegExp built-ins */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_REGEXP_SUPPORT) DUK_LOCAL void duk__get_this_regexp(duk_hthread *thr) { duk_hobject *h; duk_push_this(thr); h = duk_require_hobject_with_class(thr, -1, DUK_HOBJECT_CLASS_REGEXP); DUK_ASSERT(h != NULL); DUK_UNREF(h); duk_insert(thr, 0); /* prepend regexp to valstack 0 index */ } /* XXX: much to improve (code size) */ DUK_INTERNAL duk_ret_t duk_bi_regexp_constructor(duk_hthread *thr) { duk_hobject *h_pattern; DUK_ASSERT_TOP(thr, 2); h_pattern = duk_get_hobject(thr, 0); if (!duk_is_constructor_call(thr) && h_pattern != NULL && DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP && duk_is_undefined(thr, 1)) { /* Called as a function, pattern has [[Class]] "RegExp" and * flags is undefined -> return object as is. */ /* XXX: ES2015 has a NewTarget SameValue() check which is not * yet implemented. */ duk_dup_0(thr); return 1; } /* Else functionality is identical for function call and constructor * call. */ if (h_pattern != NULL && DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP) { duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_SOURCE); if (duk_is_undefined(thr, 1)) { /* In ES5 one would need to read the flags individually; * in ES2015 just read .flags. */ duk_get_prop_stridx(thr, 0, DUK_STRIDX_FLAGS); } else { /* In ES2015 allowed; overrides argument RegExp flags. */ duk_dup_1(thr); } } else { if (duk_is_undefined(thr, 0)) { duk_push_hstring_empty(thr); } else { duk_dup_0(thr); duk_to_string(thr, -1); /* Rejects Symbols. */ } if (duk_is_undefined(thr, 1)) { duk_push_hstring_empty(thr); } else { duk_dup_1(thr); duk_to_string(thr, -1); /* Rejects Symbols. */ } /* [ ... pattern flags ] */ } DUK_DDD(DUK_DDDPRINT("RegExp constructor/function call, pattern=%!T, flags=%!T", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); /* [ ... pattern flags ] (both uncoerced) */ duk_to_string(thr, -2); duk_to_string(thr, -1); duk_regexp_compile(thr); /* [ ... bytecode escaped_source ] */ duk_regexp_create_instance(thr); /* [ ... RegExp ] */ return 1; } DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_exec(duk_hthread *thr) { duk__get_this_regexp(thr); /* [ regexp input ] */ duk_regexp_match(thr); /* [ result ] */ return 1; } DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_test(duk_hthread *thr) { duk__get_this_regexp(thr); /* [ regexp input ] */ /* result object is created and discarded; wasteful but saves code space */ duk_regexp_match(thr); /* [ result ] */ duk_push_boolean(thr, (duk_is_null(thr, -1) ? 0 : 1)); return 1; } DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_tostring(duk_hthread *thr) { /* This must be generic in ES2015 and later. */ DUK_ASSERT_TOP(thr, 0); duk_push_this(thr); duk_push_literal(thr, "/"); duk_get_prop_stridx(thr, 0, DUK_STRIDX_SOURCE); duk_dup_m2(thr); /* another "/" */ duk_get_prop_stridx(thr, 0, DUK_STRIDX_FLAGS); duk_concat(thr, 4); return 1; } DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_flags(duk_hthread *thr) { /* .flags is ES2015 but present even when ES2015 bindings are * disabled because the constructor relies on it. */ duk_uint8_t buf[8]; /* enough for all flags + NUL */ duk_uint8_t *p = buf; /* .flags is generic and works on any object. */ duk_push_this(thr); (void) duk_require_hobject(thr, -1); if (duk_get_prop_stridx_boolean(thr, 0, DUK_STRIDX_GLOBAL, NULL)) { *p++ = DUK_ASC_LC_G; } if (duk_get_prop_stridx_boolean(thr, 0, DUK_STRIDX_IGNORE_CASE, NULL)) { *p++ = DUK_ASC_LC_I; } if (duk_get_prop_stridx_boolean(thr, 0, DUK_STRIDX_MULTILINE, NULL)) { *p++ = DUK_ASC_LC_M; } /* .unicode: to be added */ /* .sticky: to be added */ *p++ = DUK_ASC_NUL; DUK_ASSERT((duk_size_t) (p - buf) <= sizeof(buf)); duk_push_string(thr, (const char *) buf); return 1; } /* Shared helper for providing .source, .global, .multiline, etc getters. */ DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_shared_getter(duk_hthread *thr) { duk_hstring *h_bc; duk_small_uint_t re_flags; duk_hobject *h; duk_int_t magic; DUK_ASSERT_TOP(thr, 0); duk_push_this(thr); h = duk_require_hobject(thr, -1); magic = duk_get_current_magic(thr); if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_REGEXP) { duk_xget_owndataprop_stridx_short(thr, 0, DUK_STRIDX_INT_SOURCE); duk_xget_owndataprop_stridx_short(thr, 0, DUK_STRIDX_INT_BYTECODE); h_bc = duk_require_hstring(thr, -1); re_flags = (duk_small_uint_t) DUK_HSTRING_GET_DATA(h_bc)[0]; /* Safe even if h_bc length is 0 (= NUL) */ duk_pop(thr); } else if (h == thr->builtins[DUK_BIDX_REGEXP_PROTOTYPE]) { /* In ES2015 and ES2016 a TypeError would be thrown here. * However, this had real world issues so ES2017 draft * allows RegExp.prototype specifically, returning '(?:)' * for .source and undefined for all flags. */ if (magic != 16 /* .source */) { return 0; } duk_push_literal(thr, "(?:)"); /* .source handled by switch-case */ re_flags = 0; } else { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } /* [ regexp source ] */ switch (magic) { case 0: { /* global */ duk_push_boolean(thr, (re_flags & DUK_RE_FLAG_GLOBAL)); break; } case 1: { /* ignoreCase */ duk_push_boolean(thr, (re_flags & DUK_RE_FLAG_IGNORE_CASE)); break; } case 2: { /* multiline */ duk_push_boolean(thr, (re_flags & DUK_RE_FLAG_MULTILINE)); break; } #if 0 /* Don't provide until implemented to avoid interfering with feature * detection in user code. */ case 3: /* sticky */ case 4: { /* unicode */ duk_push_false(thr); break; } #endif default: { /* source */ /* leave 'source' on top */ break; } } return 1; } #endif /* DUK_USE_REGEXP_SUPPORT */ /* * String built-ins * * Most String built-ins must only accept strings (or String objects). * Symbols, represented internally as strings, must be generally rejected. * The duk_push_this_coercible_to_string() helper does this automatically. */ /* XXX: There are several limitations in the current implementation for * strings with >= 0x80000000UL characters. In some cases one would need * to be able to represent the range [-0xffffffff,0xffffffff] and so on. * Generally character and byte length are assumed to fit into signed 32 * bits (< 0x80000000UL). Places with issues are not marked explicitly * below in all cases, look for signed type usage (duk_int_t etc) for * offsets/lengths. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_STRING_BUILTIN) /* * Helpers */ DUK_LOCAL duk_hstring *duk__str_tostring_notregexp(duk_hthread *thr, duk_idx_t idx) { duk_hstring *h; if (duk_get_class_number(thr, idx) == DUK_HOBJECT_CLASS_REGEXP) { DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return NULL;); } h = duk_to_hstring(thr, idx); DUK_ASSERT(h != NULL); return h; } DUK_LOCAL duk_int_t duk__str_search_shared(duk_hthread *thr, duk_hstring *h_this, duk_hstring *h_search, duk_int_t start_cpos, duk_bool_t backwards) { duk_int_t cpos; duk_int_t bpos; const duk_uint8_t *p_start, *p_end, *p; const duk_uint8_t *q_start; duk_int_t q_blen; duk_uint8_t firstbyte; duk_uint8_t t; cpos = start_cpos; /* Empty searchstring always matches; cpos must be clamped here. * (If q_blen were < 0 due to clamped coercion, it would also be * caught here.) */ q_start = DUK_HSTRING_GET_DATA(h_search); q_blen = (duk_int_t) DUK_HSTRING_GET_BYTELEN(h_search); if (q_blen <= 0) { return cpos; } DUK_ASSERT(q_blen > 0); bpos = (duk_int_t) duk_heap_strcache_offset_char2byte(thr, h_this, (duk_uint32_t) cpos); p_start = DUK_HSTRING_GET_DATA(h_this); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_this); p = p_start + bpos; /* This loop is optimized for size. For speed, there should be * two separate loops, and we should ensure that memcmp() can be * used without an extra "will searchstring fit" check. Doing * the preconditioning for 'p' and 'p_end' is easy but cpos * must be updated if 'p' is wound back (backward scanning). */ firstbyte = q_start[0]; /* leading byte of match string */ while (p <= p_end && p >= p_start) { t = *p; /* For ECMAScript strings, this check can only match for * initial UTF-8 bytes (not continuation bytes). For other * strings all bets are off. */ if ((t == firstbyte) && ((duk_size_t) (p_end - p) >= (duk_size_t) q_blen)) { DUK_ASSERT(q_blen > 0); if (duk_memcmp((const void *) p, (const void *) q_start, (size_t) q_blen) == 0) { return cpos; } } /* track cpos while scanning */ if (backwards) { /* when going backwards, we decrement cpos 'early'; * 'p' may point to a continuation byte of the char * at offset 'cpos', but that's OK because we'll * backtrack all the way to the initial byte. */ if ((t & 0xc0) != 0x80) { cpos--; } p--; } else { if ((t & 0xc0) != 0x80) { cpos++; } p++; } } /* Not found. Empty string case is handled specially above. */ return -1; } /* * Constructor */ DUK_INTERNAL duk_ret_t duk_bi_string_constructor(duk_hthread *thr) { duk_hstring *h; duk_uint_t flags; /* String constructor needs to distinguish between an argument not given at all * vs. given as 'undefined'. We're a vararg function to handle this properly. */ /* XXX: copy current activation flags to thr, including current magic, * is_constructor_call etc. This takes a few bytes in duk_hthread but * makes call sites smaller (there are >30 is_constructor_call and get * current magic call sites. */ if (duk_get_top(thr) == 0) { duk_push_hstring_empty(thr); } else { h = duk_to_hstring_acceptsymbol(thr, 0); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h) && !duk_is_constructor_call(thr))) { duk_push_symbol_descriptive_string(thr, h); duk_replace(thr, 0); } } duk_to_string(thr, 0); /* catches symbol argument for constructor call */ DUK_ASSERT(duk_is_string(thr, 0)); duk_set_top(thr, 1); /* Top may be 1 or larger. */ if (duk_is_constructor_call(thr)) { /* String object internal value is immutable */ flags = DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_STRING); duk_push_object_helper(thr, flags, DUK_BIDX_STRING_PROTOTYPE); duk_dup_0(thr); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE); } /* Note: unbalanced stack on purpose */ return 1; } DUK_LOCAL duk_ret_t duk__construct_from_codepoints(duk_hthread *thr, duk_bool_t nonbmp) { duk_bufwriter_ctx bw_alloc; duk_bufwriter_ctx *bw; duk_idx_t i, n; duk_ucodepoint_t cp; /* XXX: It would be nice to build the string directly but ToUint16() * coercion is needed so a generic helper would not be very * helpful (perhaps coerce the value stack first here and then * build a string from a duk_tval number sequence in one go?). */ n = duk_get_top(thr); bw = &bw_alloc; DUK_BW_INIT_PUSHBUF(thr, bw, (duk_size_t) n); /* initial estimate for ASCII only codepoints */ for (i = 0; i < n; i++) { /* XXX: could improve bufwriter handling to write multiple codepoints * with one ensure call but the relative benefit would be quite small. */ if (nonbmp) { /* ES2015 requires that (1) SameValue(cp, ToInteger(cp)) and * (2) cp >= 0 and cp <= 0x10ffff. This check does not * implement the steps exactly but the outcome should be * the same. */ duk_int32_t i32 = 0; if (!duk_is_whole_get_int32(duk_to_number(thr, i), &i32) || i32 < 0 || i32 > 0x10ffffL) { DUK_DCERROR_RANGE_INVALID_ARGS(thr); } DUK_ASSERT(i32 >= 0 && i32 <= 0x10ffffL); cp = (duk_ucodepoint_t) i32; DUK_BW_WRITE_ENSURE_CESU8(thr, bw, cp); } else { #if defined(DUK_USE_NONSTD_STRING_FROMCHARCODE_32BIT) /* ToUint16() coercion is mandatory in the E5.1 specification, but * this non-compliant behavior makes more sense because we support * non-BMP codepoints. Don't use CESU-8 because that'd create * surrogate pairs. */ cp = (duk_ucodepoint_t) duk_to_uint32(thr, i); DUK_BW_WRITE_ENSURE_XUTF8(thr, bw, cp); #else cp = (duk_ucodepoint_t) duk_to_uint16(thr, i); DUK_ASSERT(cp >= 0 && cp <= 0x10ffffL); DUK_BW_WRITE_ENSURE_CESU8(thr, bw, cp); #endif } } DUK_BW_COMPACT(thr, bw); (void) duk_buffer_to_string(thr, -1); /* Safe, extended UTF-8 or CESU-8 encoded. */ return 1; } DUK_INTERNAL duk_ret_t duk_bi_string_constructor_from_char_code(duk_hthread *thr) { return duk__construct_from_codepoints(thr, 0 /*nonbmp*/); } #if defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_string_constructor_from_code_point(duk_hthread *thr) { return duk__construct_from_codepoints(thr, 1 /*nonbmp*/); } #endif /* * toString(), valueOf() */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_to_string(duk_hthread *thr) { duk_tval *tv; duk_push_this(thr); tv = duk_require_tval(thr, -1); DUK_ASSERT(tv != NULL); if (DUK_TVAL_IS_STRING(tv)) { /* return as is */ } else if (DUK_TVAL_IS_OBJECT(tv)) { duk_hobject *h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); /* Must be a "string object", i.e. class "String" */ if (DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_STRING) { goto type_error; } duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_VALUE); DUK_ASSERT(duk_is_string(thr, -1)); } else { goto type_error; } (void) duk_require_hstring_notsymbol(thr, -1); /* Reject symbols (and wrapped symbols). */ return 1; type_error: DUK_DCERROR_TYPE_INVALID_ARGS(thr); } /* * Character and charcode access */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_char_at(duk_hthread *thr) { duk_hstring *h; duk_int_t pos; /* XXX: faster implementation */ h = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h != NULL); pos = duk_to_int(thr, 0); if (sizeof(duk_size_t) >= sizeof(duk_uint_t)) { /* Cast to duk_size_t works in this case: * - If pos < 0, (duk_size_t) pos will always be * >= max_charlen, and result will be the empty string * (see duk_substring()). * - If pos >= 0, pos + 1 cannot wrap. */ DUK_ASSERT((duk_size_t) DUK_INT_MIN >= DUK_HSTRING_MAX_BYTELEN); DUK_ASSERT((duk_size_t) DUK_INT_MAX + 1U > (duk_size_t) DUK_INT_MAX); duk_substring(thr, -1, (duk_size_t) pos, (duk_size_t) pos + 1U); } else { /* If size_t is smaller than int, explicit bounds checks * are needed because an int may wrap multiple times. */ if (DUK_UNLIKELY(pos < 0 || (duk_uint_t) pos >= (duk_uint_t) DUK_HSTRING_GET_CHARLEN(h))) { duk_push_hstring_empty(thr); } else { duk_substring(thr, -1, (duk_size_t) pos, (duk_size_t) pos + 1U); } } return 1; } /* Magic: 0=charCodeAt, 1=codePointAt */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_char_code_at(duk_hthread *thr) { duk_int_t pos; duk_hstring *h; duk_bool_t clamped; duk_uint32_t cp; duk_int_t magic; /* XXX: faster implementation */ DUK_DDD(DUK_DDDPRINT("arg=%!T", (duk_tval *) duk_get_tval(thr, 0))); h = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h != NULL); pos = duk_to_int_clamped_raw(thr, 0 /*index*/, 0 /*min(incl)*/, (duk_int_t) DUK_HSTRING_GET_CHARLEN(h) - 1 /*max(incl)*/, &clamped /*out_clamped*/); #if defined(DUK_USE_ES6) magic = duk_get_current_magic(thr); #else DUK_ASSERT(duk_get_current_magic(thr) == 0); magic = 0; #endif if (clamped) { /* For out-of-bounds indices .charCodeAt() returns NaN and * .codePointAt() returns undefined. */ if (magic != 0) { return 0; } duk_push_nan(thr); } else { DUK_ASSERT(pos >= 0); cp = (duk_uint32_t) duk_hstring_char_code_at_raw(thr, h, (duk_uint_t) pos, (duk_bool_t) magic /*surrogate_aware*/); duk_push_u32(thr, cp); } return 1; } /* * substring(), substr(), slice() */ /* XXX: any chance of merging these three similar but still slightly * different algorithms so that footprint would be reduced? */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_substring(duk_hthread *thr) { duk_hstring *h; duk_int_t start_pos, end_pos; duk_int_t len; h = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h != NULL); len = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h); /* [ start end str ] */ start_pos = duk_to_int_clamped(thr, 0, 0, len); if (duk_is_undefined(thr, 1)) { end_pos = len; } else { end_pos = duk_to_int_clamped(thr, 1, 0, len); } DUK_ASSERT(start_pos >= 0 && start_pos <= len); DUK_ASSERT(end_pos >= 0 && end_pos <= len); if (start_pos > end_pos) { duk_int_t tmp = start_pos; start_pos = end_pos; end_pos = tmp; } DUK_ASSERT(end_pos >= start_pos); duk_substring(thr, -1, (duk_size_t) start_pos, (duk_size_t) end_pos); return 1; } #if defined(DUK_USE_SECTION_B) DUK_INTERNAL duk_ret_t duk_bi_string_prototype_substr(duk_hthread *thr) { duk_hstring *h; duk_int_t start_pos, end_pos; duk_int_t len; /* Unlike non-obsolete String calls, substr() algorithm in E5.1 * specification will happily coerce undefined and null to strings * ("undefined" and "null"). */ duk_push_this(thr); h = duk_to_hstring_m1(thr); /* Reject Symbols. */ DUK_ASSERT(h != NULL); len = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h); /* [ start length str ] */ /* The implementation for computing of start_pos and end_pos differs * from the standard algorithm, but is intended to result in the exactly * same behavior. This is not always obvious. */ /* combines steps 2 and 5; -len ensures max() not needed for step 5 */ start_pos = duk_to_int_clamped(thr, 0, -len, len); if (start_pos < 0) { start_pos = len + start_pos; } DUK_ASSERT(start_pos >= 0 && start_pos <= len); /* combines steps 3, 6; step 7 is not needed */ if (duk_is_undefined(thr, 1)) { end_pos = len; } else { DUK_ASSERT(start_pos <= len); end_pos = start_pos + duk_to_int_clamped(thr, 1, 0, len - start_pos); } DUK_ASSERT(start_pos >= 0 && start_pos <= len); DUK_ASSERT(end_pos >= 0 && end_pos <= len); DUK_ASSERT(end_pos >= start_pos); duk_substring(thr, -1, (duk_size_t) start_pos, (duk_size_t) end_pos); return 1; } #endif /* DUK_USE_SECTION_B */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_slice(duk_hthread *thr) { duk_hstring *h; duk_int_t start_pos, end_pos; duk_int_t len; h = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h != NULL); len = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h); /* [ start end str ] */ start_pos = duk_to_int_clamped(thr, 0, -len, len); if (start_pos < 0) { start_pos = len + start_pos; } if (duk_is_undefined(thr, 1)) { end_pos = len; } else { end_pos = duk_to_int_clamped(thr, 1, -len, len); if (end_pos < 0) { end_pos = len + end_pos; } } DUK_ASSERT(start_pos >= 0 && start_pos <= len); DUK_ASSERT(end_pos >= 0 && end_pos <= len); if (end_pos < start_pos) { end_pos = start_pos; } DUK_ASSERT(end_pos >= start_pos); duk_substring(thr, -1, (duk_size_t) start_pos, (duk_size_t) end_pos); return 1; } /* * Case conversion */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_caseconv_shared(duk_hthread *thr) { duk_small_int_t uppercase = duk_get_current_magic(thr); (void) duk_push_this_coercible_to_string(thr); duk_unicode_case_convert_string(thr, (duk_bool_t) uppercase); return 1; } /* * indexOf() and lastIndexOf() */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_indexof_shared(duk_hthread *thr) { duk_hstring *h_this; duk_hstring *h_search; duk_int_t clen_this; duk_int_t cpos; duk_small_uint_t is_lastindexof = (duk_small_uint_t) duk_get_current_magic(thr); /* 0=indexOf, 1=lastIndexOf */ h_this = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h_this != NULL); clen_this = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h_this); h_search = duk_to_hstring(thr, 0); DUK_ASSERT(h_search != NULL); duk_to_number(thr, 1); if (duk_is_nan(thr, 1) && is_lastindexof) { /* indexOf: NaN should cause pos to be zero. * lastIndexOf: NaN should cause pos to be +Infinity * (and later be clamped to len). */ cpos = clen_this; } else { cpos = duk_to_int_clamped(thr, 1, 0, clen_this); } cpos = duk__str_search_shared(thr, h_this, h_search, cpos, is_lastindexof /*backwards*/); duk_push_int(thr, cpos); return 1; } /* * replace() */ /* XXX: the current implementation works but is quite clunky; it compiles * to almost 1,4kB of x86 code so it needs to be simplified (better approach, * shared helpers, etc). Some ideas for refactoring: * * - a primitive to convert a string into a regexp matcher (reduces matching * code at the cost of making matching much slower) * - use replace() as a basic helper for match() and split(), which are both * much simpler * - API call to get_prop and to_boolean */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_replace(duk_hthread *thr) { duk_hstring *h_input; duk_hstring *h_match; duk_hstring *h_search; duk_hobject *h_re; duk_bufwriter_ctx bw_alloc; duk_bufwriter_ctx *bw; #if defined(DUK_USE_REGEXP_SUPPORT) duk_bool_t is_regexp; duk_bool_t is_global; #endif duk_bool_t is_repl_func; duk_uint32_t match_start_coff, match_start_boff; #if defined(DUK_USE_REGEXP_SUPPORT) duk_int_t match_caps; #endif duk_uint32_t prev_match_end_boff; const duk_uint8_t *r_start, *r_end, *r; /* repl string scan */ duk_size_t tmp_sz; DUK_ASSERT_TOP(thr, 2); h_input = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h_input != NULL); bw = &bw_alloc; DUK_BW_INIT_PUSHBUF(thr, bw, DUK_HSTRING_GET_BYTELEN(h_input)); /* input size is good output starting point */ DUK_ASSERT_TOP(thr, 4); /* stack[0] = search value * stack[1] = replace value * stack[2] = input string * stack[3] = result buffer */ h_re = duk_get_hobject_with_class(thr, 0, DUK_HOBJECT_CLASS_REGEXP); if (h_re) { #if defined(DUK_USE_REGEXP_SUPPORT) is_regexp = 1; is_global = duk_get_prop_stridx_boolean(thr, 0, DUK_STRIDX_GLOBAL, NULL); if (is_global) { /* start match from beginning */ duk_push_int(thr, 0); duk_put_prop_stridx_short(thr, 0, DUK_STRIDX_LAST_INDEX); } #else /* DUK_USE_REGEXP_SUPPORT */ DUK_DCERROR_UNSUPPORTED(thr); #endif /* DUK_USE_REGEXP_SUPPORT */ } else { duk_to_string(thr, 0); /* rejects symbols */ #if defined(DUK_USE_REGEXP_SUPPORT) is_regexp = 0; is_global = 0; #endif } if (duk_is_function(thr, 1)) { is_repl_func = 1; r_start = NULL; r_end = NULL; } else { duk_hstring *h_repl; is_repl_func = 0; h_repl = duk_to_hstring(thr, 1); /* reject symbols */ DUK_ASSERT(h_repl != NULL); r_start = DUK_HSTRING_GET_DATA(h_repl); r_end = r_start + DUK_HSTRING_GET_BYTELEN(h_repl); } prev_match_end_boff = 0; for (;;) { /* * If matching with a regexp: * - non-global RegExp: lastIndex not touched on a match, zeroed * on a non-match * - global RegExp: on match, lastIndex will be updated by regexp * executor to point to next char after the matching part (so that * characters in the matching part are not matched again) * * If matching with a string: * - always non-global match, find first occurrence * * We need: * - The character offset of start-of-match for the replacer function * - The byte offsets for start-of-match and end-of-match to implement * the replacement values $&, $`, and $', and to copy non-matching * input string portions (including header and trailer) verbatim. * * NOTE: the E5.1 specification is a bit vague how the RegExp should * behave in the replacement process; e.g. is matching done first for * all matches (in the global RegExp case) before any replacer calls * are made? See: test-bi-string-proto-replace.js for discussion. */ DUK_ASSERT_TOP(thr, 4); #if defined(DUK_USE_REGEXP_SUPPORT) if (is_regexp) { duk_dup_0(thr); duk_dup_2(thr); duk_regexp_match(thr); /* [ ... regexp input ] -> [ res_obj ] */ if (!duk_is_object(thr, -1)) { duk_pop(thr); break; } duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_INDEX); DUK_ASSERT(duk_is_number(thr, -1)); match_start_coff = duk_get_uint(thr, -1); duk_pop(thr); duk_get_prop_index(thr, -1, 0); DUK_ASSERT(duk_is_string(thr, -1)); h_match = duk_known_hstring(thr, -1); duk_pop(thr); /* h_match is borrowed, remains reachable through match_obj */ if (DUK_HSTRING_GET_BYTELEN(h_match) == 0) { /* This should be equivalent to match() algorithm step 8.f.iii.2: * detect an empty match and allow it, but don't allow it twice. */ duk_uint32_t last_index; duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_LAST_INDEX); last_index = (duk_uint32_t) duk_get_uint(thr, -1); DUK_DDD(DUK_DDDPRINT("empty match, bump lastIndex: %ld -> %ld", (long) last_index, (long) (last_index + 1))); duk_pop(thr); duk_push_uint(thr, (duk_uint_t) (last_index + 1)); duk_put_prop_stridx_short(thr, 0, DUK_STRIDX_LAST_INDEX); } DUK_ASSERT(duk_get_length(thr, -1) <= DUK_INT_MAX); /* string limits */ match_caps = (duk_int_t) duk_get_length(thr, -1); } else { #else /* DUK_USE_REGEXP_SUPPORT */ { /* unconditionally */ #endif /* DUK_USE_REGEXP_SUPPORT */ const duk_uint8_t *p_start, *p_end, *p; /* input string scan */ const duk_uint8_t *q_start; /* match string */ duk_size_t q_blen; #if defined(DUK_USE_REGEXP_SUPPORT) DUK_ASSERT(!is_global); /* single match always */ #endif p_start = DUK_HSTRING_GET_DATA(h_input); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input); p = p_start; h_search = duk_known_hstring(thr, 0); q_start = DUK_HSTRING_GET_DATA(h_search); q_blen = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h_search); p_end -= q_blen; /* ensure full memcmp() fits in while */ match_start_coff = 0; while (p <= p_end) { DUK_ASSERT(p + q_blen <= DUK_HSTRING_GET_DATA(h_input) + DUK_HSTRING_GET_BYTELEN(h_input)); if (duk_memcmp((const void *) p, (const void *) q_start, (size_t) q_blen) == 0) { duk_dup_0(thr); h_match = duk_known_hstring(thr, -1); #if defined(DUK_USE_REGEXP_SUPPORT) match_caps = 0; #endif goto found; } /* track utf-8 non-continuation bytes */ if ((p[0] & 0xc0) != 0x80) { match_start_coff++; } p++; } /* not found */ break; } found: /* stack[0] = search value * stack[1] = replace value * stack[2] = input string * stack[3] = result buffer * stack[4] = regexp match OR match string */ match_start_boff = (duk_uint32_t) duk_heap_strcache_offset_char2byte(thr, h_input, match_start_coff); tmp_sz = (duk_size_t) (match_start_boff - prev_match_end_boff); DUK_BW_WRITE_ENSURE_BYTES(thr, bw, DUK_HSTRING_GET_DATA(h_input) + prev_match_end_boff, tmp_sz); prev_match_end_boff = match_start_boff + DUK_HSTRING_GET_BYTELEN(h_match); if (is_repl_func) { duk_idx_t idx_args; duk_hstring *h_repl; /* regexp res_obj is at index 4 */ duk_dup_1(thr); idx_args = duk_get_top(thr); #if defined(DUK_USE_REGEXP_SUPPORT) if (is_regexp) { duk_int_t idx; duk_require_stack(thr, match_caps + 2); for (idx = 0; idx < match_caps; idx++) { /* match followed by capture(s) */ duk_get_prop_index(thr, 4, (duk_uarridx_t) idx); } } else { #else /* DUK_USE_REGEXP_SUPPORT */ { /* unconditionally */ #endif /* DUK_USE_REGEXP_SUPPORT */ /* match == search string, by definition */ duk_dup_0(thr); } duk_push_uint(thr, (duk_uint_t) match_start_coff); duk_dup_2(thr); /* [ ... replacer match [captures] match_char_offset input ] */ duk_call(thr, duk_get_top(thr) - idx_args); h_repl = duk_to_hstring_m1(thr); /* -> [ ... repl_value ] */ DUK_ASSERT(h_repl != NULL); DUK_BW_WRITE_ENSURE_HSTRING(thr, bw, h_repl); duk_pop(thr); /* repl_value */ } else { r = r_start; while (r < r_end) { duk_int_t ch1; duk_int_t ch2; #if defined(DUK_USE_REGEXP_SUPPORT) duk_int_t ch3; #endif duk_size_t left; ch1 = *r++; if (ch1 != DUK_ASC_DOLLAR) { goto repl_write; } DUK_ASSERT(r <= r_end); left = (duk_size_t) (r_end - r); if (left <= 0) { goto repl_write; } ch2 = r[0]; switch (ch2) { case DUK_ASC_DOLLAR: { ch1 = (1 << 8) + DUK_ASC_DOLLAR; goto repl_write; } case DUK_ASC_AMP: { DUK_BW_WRITE_ENSURE_HSTRING(thr, bw, h_match); r++; continue; } case DUK_ASC_GRAVE: { tmp_sz = (duk_size_t) match_start_boff; DUK_BW_WRITE_ENSURE_BYTES(thr, bw, DUK_HSTRING_GET_DATA(h_input), tmp_sz); r++; continue; } case DUK_ASC_SINGLEQUOTE: { duk_uint32_t match_end_boff; /* Use match charlen instead of bytelen, just in case the input and * match codepoint encodings would have different lengths. */ /* XXX: charlen computed here, and also in char2byte helper. */ match_end_boff = (duk_uint32_t) duk_heap_strcache_offset_char2byte(thr, h_input, match_start_coff + (duk_uint_fast32_t) DUK_HSTRING_GET_CHARLEN(h_match)); tmp_sz = (duk_size_t) (DUK_HSTRING_GET_BYTELEN(h_input) - match_end_boff); DUK_BW_WRITE_ENSURE_BYTES(thr, bw, DUK_HSTRING_GET_DATA(h_input) + match_end_boff, tmp_sz); r++; continue; } default: { #if defined(DUK_USE_REGEXP_SUPPORT) duk_int_t capnum, captmp, capadv; /* XXX: optional check, match_caps is zero if no regexp, * so dollar will be interpreted literally anyway. */ if (!is_regexp) { goto repl_write; } if (!(ch2 >= DUK_ASC_0 && ch2 <= DUK_ASC_9)) { goto repl_write; } capnum = ch2 - DUK_ASC_0; capadv = 1; if (left >= 2) { ch3 = r[1]; if (ch3 >= DUK_ASC_0 && ch3 <= DUK_ASC_9) { captmp = capnum * 10 + (ch3 - DUK_ASC_0); if (captmp < match_caps) { capnum = captmp; capadv = 2; } } } if (capnum > 0 && capnum < match_caps) { DUK_ASSERT(is_regexp != 0); /* match_caps == 0 without regexps */ /* regexp res_obj is at offset 4 */ duk_get_prop_index(thr, 4, (duk_uarridx_t) capnum); if (duk_is_string(thr, -1)) { duk_hstring *h_tmp_str; h_tmp_str = duk_known_hstring(thr, -1); DUK_BW_WRITE_ENSURE_HSTRING(thr, bw, h_tmp_str); } else { /* undefined -> skip (replaced with empty) */ } duk_pop(thr); r += capadv; continue; } else { goto repl_write; } #else /* DUK_USE_REGEXP_SUPPORT */ goto repl_write; /* unconditionally */ #endif /* DUK_USE_REGEXP_SUPPORT */ } /* default case */ } /* switch (ch2) */ repl_write: /* ch1 = (r_increment << 8) + byte */ DUK_BW_WRITE_ENSURE_U8(thr, bw, (duk_uint8_t) (ch1 & 0xff)); r += ch1 >> 8; } /* while repl */ } /* if (is_repl_func) */ duk_pop(thr); /* pop regexp res_obj or match string */ #if defined(DUK_USE_REGEXP_SUPPORT) if (!is_global) { #else { /* unconditionally; is_global==0 */ #endif break; } } /* trailer */ tmp_sz = (duk_size_t) (DUK_HSTRING_GET_BYTELEN(h_input) - prev_match_end_boff); DUK_BW_WRITE_ENSURE_BYTES(thr, bw, DUK_HSTRING_GET_DATA(h_input) + prev_match_end_boff, tmp_sz); DUK_ASSERT_TOP(thr, 4); DUK_BW_COMPACT(thr, bw); (void) duk_buffer_to_string(thr, -1); /* Safe if inputs are safe. */ return 1; } /* * split() */ /* XXX: very messy now, but works; clean up, remove unused variables (nomimally * used so compiler doesn't complain). */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_split(duk_hthread *thr) { duk_hstring *h_input; duk_hstring *h_sep; duk_uint32_t limit; duk_uint32_t arr_idx; #if defined(DUK_USE_REGEXP_SUPPORT) duk_bool_t is_regexp; #endif duk_bool_t matched; /* set to 1 if any match exists (needed for empty input special case) */ duk_uint32_t prev_match_end_coff, prev_match_end_boff; duk_uint32_t match_start_boff, match_start_coff; duk_uint32_t match_end_boff, match_end_coff; h_input = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h_input != NULL); duk_push_array(thr); if (duk_is_undefined(thr, 1)) { limit = 0xffffffffUL; } else { limit = duk_to_uint32(thr, 1); } if (limit == 0) { return 1; } /* If the separator is a RegExp, make a "clone" of it. The specification * algorithm calls [[Match]] directly for specific indices; we emulate this * by tweaking lastIndex and using a "force global" variant of duk_regexp_match() * which will use global-style matching even when the RegExp itself is non-global. */ if (duk_is_undefined(thr, 0)) { /* The spec algorithm first does "R = ToString(separator)" before checking * whether separator is undefined. Since this is side effect free, we can * skip the ToString() here. */ duk_dup_2(thr); duk_put_prop_index(thr, 3, 0); return 1; } else if (duk_get_hobject_with_class(thr, 0, DUK_HOBJECT_CLASS_REGEXP) != NULL) { #if defined(DUK_USE_REGEXP_SUPPORT) duk_push_hobject_bidx(thr, DUK_BIDX_REGEXP_CONSTRUCTOR); duk_dup_0(thr); duk_new(thr, 1); /* [ ... RegExp val ] -> [ ... res ] */ duk_replace(thr, 0); /* lastIndex is initialized to zero by new RegExp() */ is_regexp = 1; #else DUK_DCERROR_UNSUPPORTED(thr); #endif } else { duk_to_string(thr, 0); #if defined(DUK_USE_REGEXP_SUPPORT) is_regexp = 0; #endif } /* stack[0] = separator (string or regexp) * stack[1] = limit * stack[2] = input string * stack[3] = result array */ prev_match_end_boff = 0; prev_match_end_coff = 0; arr_idx = 0; matched = 0; for (;;) { /* * The specification uses RegExp [[Match]] to attempt match at specific * offsets. We don't have such a primitive, so we use an actual RegExp * and tweak lastIndex. Since the RegExp may be non-global, we use a * special variant which forces global-like behavior for matching. */ DUK_ASSERT_TOP(thr, 4); #if defined(DUK_USE_REGEXP_SUPPORT) if (is_regexp) { duk_dup_0(thr); duk_dup_2(thr); duk_regexp_match_force_global(thr); /* [ ... regexp input ] -> [ res_obj ] */ if (!duk_is_object(thr, -1)) { duk_pop(thr); break; } matched = 1; duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_INDEX); DUK_ASSERT(duk_is_number(thr, -1)); match_start_coff = duk_get_uint(thr, -1); match_start_boff = (duk_uint32_t) duk_heap_strcache_offset_char2byte(thr, h_input, match_start_coff); duk_pop(thr); if (match_start_coff == DUK_HSTRING_GET_CHARLEN(h_input)) { /* don't allow an empty match at the end of the string */ duk_pop(thr); break; } duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_LAST_INDEX); DUK_ASSERT(duk_is_number(thr, -1)); match_end_coff = duk_get_uint(thr, -1); match_end_boff = (duk_uint32_t) duk_heap_strcache_offset_char2byte(thr, h_input, match_end_coff); duk_pop(thr); /* empty match -> bump and continue */ if (prev_match_end_boff == match_end_boff) { duk_push_uint(thr, (duk_uint_t) (match_end_coff + 1)); duk_put_prop_stridx_short(thr, 0, DUK_STRIDX_LAST_INDEX); duk_pop(thr); continue; } } else { #else /* DUK_USE_REGEXP_SUPPORT */ { /* unconditionally */ #endif /* DUK_USE_REGEXP_SUPPORT */ const duk_uint8_t *p_start, *p_end, *p; /* input string scan */ const duk_uint8_t *q_start; /* match string */ duk_size_t q_blen, q_clen; p_start = DUK_HSTRING_GET_DATA(h_input); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input); p = p_start + prev_match_end_boff; h_sep = duk_known_hstring(thr, 0); /* symbol already rejected above */ q_start = DUK_HSTRING_GET_DATA(h_sep); q_blen = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h_sep); q_clen = (duk_size_t) DUK_HSTRING_GET_CHARLEN(h_sep); p_end -= q_blen; /* ensure full memcmp() fits in while */ match_start_coff = prev_match_end_coff; if (q_blen == 0) { /* Handle empty separator case: it will always match, and always * triggers the check in step 13.c.iii initially. Note that we * must skip to either end of string or start of first codepoint, * skipping over any continuation bytes! * * Don't allow an empty string to match at the end of the input. */ matched = 1; /* empty separator can always match */ match_start_coff++; p++; while (p < p_end) { if ((p[0] & 0xc0) != 0x80) { goto found; } p++; } goto not_found; } DUK_ASSERT(q_blen > 0 && q_clen > 0); while (p <= p_end) { DUK_ASSERT(p + q_blen <= DUK_HSTRING_GET_DATA(h_input) + DUK_HSTRING_GET_BYTELEN(h_input)); DUK_ASSERT(q_blen > 0); /* no issues with empty memcmp() */ if (duk_memcmp((const void *) p, (const void *) q_start, (size_t) q_blen) == 0) { /* never an empty match, so step 13.c.iii can't be triggered */ goto found; } /* track utf-8 non-continuation bytes */ if ((p[0] & 0xc0) != 0x80) { match_start_coff++; } p++; } not_found: /* not found */ break; found: matched = 1; match_start_boff = (duk_uint32_t) (p - p_start); match_end_coff = (duk_uint32_t) (match_start_coff + q_clen); /* constrained by string length */ match_end_boff = (duk_uint32_t) (match_start_boff + q_blen); /* ditto */ /* empty match (may happen with empty separator) -> bump and continue */ if (prev_match_end_boff == match_end_boff) { prev_match_end_boff++; prev_match_end_coff++; continue; } } /* if (is_regexp) */ /* stack[0] = separator (string or regexp) * stack[1] = limit * stack[2] = input string * stack[3] = result array * stack[4] = regexp res_obj (if is_regexp) */ DUK_DDD(DUK_DDDPRINT("split; match_start b=%ld,c=%ld, match_end b=%ld,c=%ld, prev_end b=%ld,c=%ld", (long) match_start_boff, (long) match_start_coff, (long) match_end_boff, (long) match_end_coff, (long) prev_match_end_boff, (long) prev_match_end_coff)); duk_push_lstring(thr, (const char *) (DUK_HSTRING_GET_DATA(h_input) + prev_match_end_boff), (duk_size_t) (match_start_boff - prev_match_end_boff)); duk_put_prop_index(thr, 3, arr_idx); arr_idx++; if (arr_idx >= limit) { goto hit_limit; } #if defined(DUK_USE_REGEXP_SUPPORT) if (is_regexp) { duk_size_t i, len; len = duk_get_length(thr, 4); for (i = 1; i < len; i++) { DUK_ASSERT(i <= DUK_UARRIDX_MAX); /* cannot have >4G captures */ duk_get_prop_index(thr, 4, (duk_uarridx_t) i); duk_put_prop_index(thr, 3, arr_idx); arr_idx++; if (arr_idx >= limit) { goto hit_limit; } } duk_pop(thr); /* lastIndex already set up for next match */ } else { #else /* DUK_USE_REGEXP_SUPPORT */ { /* unconditionally */ #endif /* DUK_USE_REGEXP_SUPPORT */ /* no action */ } prev_match_end_boff = match_end_boff; prev_match_end_coff = match_end_coff; continue; } /* for */ /* Combined step 11 (empty string special case) and 14-15. */ DUK_DDD(DUK_DDDPRINT("split trailer; prev_end b=%ld,c=%ld", (long) prev_match_end_boff, (long) prev_match_end_coff)); if (DUK_HSTRING_GET_BYTELEN(h_input) > 0 || !matched) { /* Add trailer if: * a) non-empty input * b) empty input and no (zero size) match found (step 11) */ duk_push_lstring(thr, (const char *) DUK_HSTRING_GET_DATA(h_input) + prev_match_end_boff, (duk_size_t) (DUK_HSTRING_GET_BYTELEN(h_input) - prev_match_end_boff)); duk_put_prop_index(thr, 3, arr_idx); /* No arr_idx update or limit check */ } return 1; hit_limit: #if defined(DUK_USE_REGEXP_SUPPORT) if (is_regexp) { duk_pop(thr); } #endif return 1; } /* * Various */ #if defined(DUK_USE_REGEXP_SUPPORT) DUK_LOCAL void duk__to_regexp_helper(duk_hthread *thr, duk_idx_t idx, duk_bool_t force_new) { duk_hobject *h; /* Shared helper for match() steps 3-4, search() steps 3-4. */ DUK_ASSERT(idx >= 0); if (force_new) { goto do_new; } h = duk_get_hobject_with_class(thr, idx, DUK_HOBJECT_CLASS_REGEXP); if (!h) { goto do_new; } return; do_new: duk_push_hobject_bidx(thr, DUK_BIDX_REGEXP_CONSTRUCTOR); duk_dup(thr, idx); duk_new(thr, 1); /* [ ... RegExp val ] -> [ ... res ] */ duk_replace(thr, idx); } #endif /* DUK_USE_REGEXP_SUPPORT */ #if defined(DUK_USE_REGEXP_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_string_prototype_search(duk_hthread *thr) { /* Easiest way to implement the search required by the specification * is to do a RegExp test() with lastIndex forced to zero. To avoid * side effects on the argument, "clone" the RegExp if a RegExp was * given as input. * * The global flag of the RegExp should be ignored; setting lastIndex * to zero (which happens when "cloning" the RegExp) should have an * equivalent effect. */ DUK_ASSERT_TOP(thr, 1); (void) duk_push_this_coercible_to_string(thr); /* at index 1 */ duk__to_regexp_helper(thr, 0 /*index*/, 1 /*force_new*/); /* stack[0] = regexp * stack[1] = string */ /* Avoid using RegExp.prototype methods, as they're writable and * configurable and may have been changed. */ duk_dup_0(thr); duk_dup_1(thr); /* [ ... re_obj input ] */ duk_regexp_match(thr); /* -> [ ... res_obj ] */ if (!duk_is_object(thr, -1)) { duk_push_int(thr, -1); return 1; } duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_INDEX); DUK_ASSERT(duk_is_number(thr, -1)); return 1; } #endif /* DUK_USE_REGEXP_SUPPORT */ #if defined(DUK_USE_REGEXP_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_string_prototype_match(duk_hthread *thr) { duk_bool_t global; duk_int_t prev_last_index; duk_int_t this_index; duk_int_t arr_idx; DUK_ASSERT_TOP(thr, 1); (void) duk_push_this_coercible_to_string(thr); duk__to_regexp_helper(thr, 0 /*index*/, 0 /*force_new*/); global = duk_get_prop_stridx_boolean(thr, 0, DUK_STRIDX_GLOBAL, NULL); DUK_ASSERT_TOP(thr, 2); /* stack[0] = regexp * stack[1] = string */ if (!global) { duk_regexp_match(thr); /* -> [ res_obj ] */ return 1; /* return 'res_obj' */ } /* Global case is more complex. */ /* [ regexp string ] */ duk_push_int(thr, 0); duk_put_prop_stridx_short(thr, 0, DUK_STRIDX_LAST_INDEX); duk_push_array(thr); /* [ regexp string res_arr ] */ prev_last_index = 0; arr_idx = 0; for (;;) { DUK_ASSERT_TOP(thr, 3); duk_dup_0(thr); duk_dup_1(thr); duk_regexp_match(thr); /* -> [ ... regexp string ] -> [ ... res_obj ] */ if (!duk_is_object(thr, -1)) { duk_pop(thr); break; } duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_LAST_INDEX); DUK_ASSERT(duk_is_number(thr, -1)); this_index = duk_get_int(thr, -1); duk_pop(thr); if (this_index == prev_last_index) { this_index++; duk_push_int(thr, this_index); duk_put_prop_stridx_short(thr, 0, DUK_STRIDX_LAST_INDEX); } prev_last_index = this_index; duk_get_prop_index(thr, -1, 0); /* match string */ duk_put_prop_index(thr, 2, (duk_uarridx_t) arr_idx); arr_idx++; duk_pop(thr); /* res_obj */ } if (arr_idx == 0) { duk_push_null(thr); } return 1; /* return 'res_arr' or 'null' */ } #endif /* DUK_USE_REGEXP_SUPPORT */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_concat(duk_hthread *thr) { /* duk_concat() coerces arguments with ToString() in correct order */ (void) duk_push_this_coercible_to_string(thr); duk_insert(thr, 0); /* this is relatively expensive */ duk_concat(thr, duk_get_top(thr)); return 1; } DUK_INTERNAL duk_ret_t duk_bi_string_prototype_trim(duk_hthread *thr) { DUK_ASSERT_TOP(thr, 0); (void) duk_push_this_coercible_to_string(thr); duk_trim(thr, 0); DUK_ASSERT_TOP(thr, 1); return 1; } #if defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_string_prototype_repeat(duk_hthread *thr) { duk_hstring *h_input; duk_size_t input_blen; duk_size_t result_len; duk_int_t count_signed; duk_uint_t count; const duk_uint8_t *src; duk_uint8_t *buf; duk_uint8_t *p; duk_double_t d; #if !defined(DUK_USE_PREFER_SIZE) duk_size_t copy_size; duk_uint8_t *p_end; #endif DUK_ASSERT_TOP(thr, 1); h_input = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h_input != NULL); input_blen = DUK_HSTRING_GET_BYTELEN(h_input); /* Count is ToNumber() coerced; +Infinity must be always rejected * (even if input string is zero length), as well as negative values * and -Infinity. -Infinity doesn't require an explicit check * because duk_get_int() clamps it to DUK_INT_MIN which gets rejected * as a negative value (regardless of input string length). */ d = duk_to_number(thr, 0); if (duk_double_is_posinf(d)) { goto fail_range; } count_signed = duk_get_int(thr, 0); if (count_signed < 0) { goto fail_range; } count = (duk_uint_t) count_signed; /* Overflow check for result length. */ result_len = count * input_blen; if (count != 0 && result_len / count != input_blen) { goto fail_range; } /* Temporary fixed buffer, later converted to string. */ buf = (duk_uint8_t *) duk_push_fixed_buffer_nozero(thr, result_len); DUK_ASSERT(buf != NULL); src = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input); DUK_ASSERT(src != NULL); #if defined(DUK_USE_PREFER_SIZE) p = buf; while (count-- > 0) { duk_memcpy((void *) p, (const void *) src, input_blen); /* copy size may be zero, but pointers are valid */ p += input_blen; } #else /* DUK_USE_PREFER_SIZE */ /* Take advantage of already copied pieces to speed up the process * especially for small repeated strings. */ p = buf; p_end = p + result_len; copy_size = input_blen; for (;;) { duk_size_t remain = (duk_size_t) (p_end - p); DUK_DDD(DUK_DDDPRINT("remain=%ld, copy_size=%ld, input_blen=%ld, result_len=%ld", (long) remain, (long) copy_size, (long) input_blen, (long) result_len)); if (remain <= copy_size) { /* If result_len is zero, this case is taken and does * a zero size copy (with valid pointers). */ duk_memcpy((void *) p, (const void *) src, remain); break; } else { duk_memcpy((void *) p, (const void *) src, copy_size); p += copy_size; } src = (const duk_uint8_t *) buf; /* Use buf as source for larger copies. */ copy_size = (duk_size_t) (p - buf); } #endif /* DUK_USE_PREFER_SIZE */ /* XXX: It would be useful to be able to create a duk_hstring with * a certain byte size whose data area wasn't initialized and which * wasn't in the string table yet. This would allow a string to be * constructed directly without a buffer temporary and when it was * finished, it could be injected into the string table. Currently * this isn't possible because duk_hstrings are only tracked by the * intern table (they are not in heap_allocated). */ duk_buffer_to_string(thr, -1); /* Safe if input is safe. */ return 1; fail_range: DUK_DCERROR_RANGE_INVALID_ARGS(thr); } #endif /* DUK_USE_ES6 */ DUK_INTERNAL duk_ret_t duk_bi_string_prototype_locale_compare(duk_hthread *thr) { duk_hstring *h1; duk_hstring *h2; duk_size_t h1_len, h2_len, prefix_len; duk_small_int_t ret = 0; duk_small_int_t rc; /* The current implementation of localeCompare() is simply a codepoint * by codepoint comparison, implemented with a simple string compare * because UTF-8 should preserve codepoint ordering (assuming valid * shortest UTF-8 encoding). * * The specification requires that the return value must be related * to the sort order: e.g. negative means that 'this' comes before * 'that' in sort order. We assume an ascending sort order. */ /* XXX: could share code with duk_js_ops.c, duk_js_compare_helper */ h1 = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h1 != NULL); h2 = duk_to_hstring(thr, 0); DUK_ASSERT(h2 != NULL); h1_len = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h1); h2_len = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h2); prefix_len = (h1_len <= h2_len ? h1_len : h2_len); rc = (duk_small_int_t) duk_memcmp((const void *) DUK_HSTRING_GET_DATA(h1), (const void *) DUK_HSTRING_GET_DATA(h2), (size_t) prefix_len); if (rc < 0) { ret = -1; goto done; } else if (rc > 0) { ret = 1; goto done; } /* prefix matches, lengths matter now */ if (h1_len > h2_len) { ret = 1; goto done; } else if (h1_len == h2_len) { DUK_ASSERT(ret == 0); goto done; } ret = -1; goto done; done: duk_push_int(thr, (duk_int_t) ret); return 1; } #if defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_string_prototype_startswith_endswith(duk_hthread *thr) { duk_int_t magic; duk_hstring *h; duk_hstring *h_search; duk_size_t blen_search; const duk_uint8_t *p_cmp_start; duk_bool_t result; h = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h != NULL); h_search = duk__str_tostring_notregexp(thr, 0); DUK_ASSERT(h_search != NULL); magic = duk_get_current_magic(thr); p_cmp_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h); blen_search = DUK_HSTRING_GET_BYTELEN(h_search); if (duk_is_undefined(thr, 1)) { if (magic) { p_cmp_start = p_cmp_start + DUK_HSTRING_GET_BYTELEN(h) - blen_search; } else { /* p_cmp_start already OK */ } } else { duk_int_t len; duk_int_t pos; DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= DUK_INT_MAX); len = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h); pos = duk_to_int_clamped(thr, 1, 0, len); DUK_ASSERT(pos >= 0 && pos <= len); if (magic) { p_cmp_start -= blen_search; /* Conceptually subtracted last, but do already here. */ } DUK_ASSERT(pos >= 0 && pos <= len); p_cmp_start += duk_heap_strcache_offset_char2byte(thr, h, (duk_uint_fast32_t) pos); } /* The main comparison can be done using a memcmp() rather than * doing codepoint comparisons: for CESU-8 strings there is a * canonical representation for every codepoint. But we do need * to deal with the char/byte offset translation to find the * comparison range. */ result = 0; if (p_cmp_start >= DUK_HSTRING_GET_DATA(h) && (duk_size_t) (p_cmp_start - (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h)) + blen_search <= DUK_HSTRING_GET_BYTELEN(h)) { if (duk_memcmp((const void *) p_cmp_start, (const void *) DUK_HSTRING_GET_DATA(h_search), (size_t) blen_search) == 0) { result = 1; } } duk_push_boolean(thr, result); return 1; } #endif /* DUK_USE_ES6 */ #if defined(DUK_USE_ES6) DUK_INTERNAL duk_ret_t duk_bi_string_prototype_includes(duk_hthread *thr) { duk_hstring *h; duk_hstring *h_search; duk_int_t len; duk_int_t pos; h = duk_push_this_coercible_to_string(thr); DUK_ASSERT(h != NULL); h_search = duk__str_tostring_notregexp(thr, 0); DUK_ASSERT(h_search != NULL); len = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h); pos = duk_to_int_clamped(thr, 1, 0, len); DUK_ASSERT(pos >= 0 && pos <= len); pos = duk__str_search_shared(thr, h, h_search, pos, 0 /*backwards*/); duk_push_boolean(thr, pos >= 0); return 1; } #endif /* DUK_USE_ES6 */ #endif /* DUK_USE_STRING_BUILTIN */ /* * Symbol built-in */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_SYMBOL_BUILTIN) /* * Constructor */ DUK_INTERNAL duk_ret_t duk_bi_symbol_constructor_shared(duk_hthread *thr) { const duk_uint8_t *desc; duk_size_t len; duk_uint8_t *buf; duk_uint8_t *p; duk_int_t magic; magic = duk_get_current_magic(thr); if (duk_is_undefined(thr, 0) && (magic == 0)) { /* Symbol() accepts undefined and empty string, but they are * treated differently. */ desc = NULL; len = 0; } else { /* Symbol.for() coerces undefined to 'undefined' */ desc = (const duk_uint8_t *) duk_to_lstring(thr, 0, &len); } /* Maximum symbol data length: * +1 initial byte (0x80 or 0x81) * +len description * +1 0xff after description, before unique suffix * +17 autogenerated unique suffix: 'ffffffff-ffffffff' is longest * +1 0xff after unique suffix for symbols with undefined description */ buf = (duk_uint8_t *) duk_push_fixed_buffer(thr, 1 + len + 1 + 17 + 1); DUK_ASSERT(buf != NULL); p = buf + 1; DUK_ASSERT(desc != NULL || len == 0); /* may be NULL if len is 0 */ duk_memcpy_unsafe((void *) p, (const void *) desc, len); p += len; if (magic == 0) { /* Symbol(): create unique symbol. Use two 32-bit values * to avoid dependency on 64-bit types and 64-bit integer * formatting (at least for now). */ if (++thr->heap->sym_counter[0] == 0) { thr->heap->sym_counter[1]++; } p += DUK_SPRINTF((char *) p, "\xFF" "%lx-%lx", (unsigned long) thr->heap->sym_counter[1], (unsigned long) thr->heap->sym_counter[0]); if (desc == NULL) { /* Special case for 'undefined' description, trailing * 0xff distinguishes from empty string description, * but needs minimal special case handling elsewhere. */ *p++ = 0xff; } buf[0] = 0x81; } else { /* Symbol.for(): create a global symbol */ buf[0] = 0x80; } duk_push_lstring(thr, (const char *) buf, (duk_size_t) (p - buf)); DUK_DDD(DUK_DDDPRINT("created symbol: %!T", duk_get_tval(thr, -1))); return 1; } DUK_LOCAL duk_hstring *duk__auto_unbox_symbol(duk_hthread *thr, duk_tval *tv_arg) { duk_tval *tv; duk_hobject *h_obj; duk_hstring *h_str; DUK_ASSERT(tv_arg != NULL); /* XXX: add internal helper: duk_auto_unbox_tval(thr, tv, mask); */ /* XXX: add internal helper: duk_auto_unbox(thr, tv, idx); */ tv = tv_arg; if (DUK_TVAL_IS_OBJECT(tv)) { h_obj = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h_obj != NULL); if (DUK_HOBJECT_GET_CLASS_NUMBER(h_obj) == DUK_HOBJECT_CLASS_SYMBOL) { tv = duk_hobject_get_internal_value_tval_ptr(thr->heap, h_obj); if (tv == NULL) { return NULL; } } else { return NULL; } } if (!DUK_TVAL_IS_STRING(tv)) { return NULL; } h_str = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h_str != NULL); /* Here symbol is more expected than not. */ if (DUK_UNLIKELY(!DUK_HSTRING_HAS_SYMBOL(h_str))) { return NULL; } return h_str; } DUK_INTERNAL duk_ret_t duk_bi_symbol_tostring_shared(duk_hthread *thr) { duk_hstring *h_str; h_str = duk__auto_unbox_symbol(thr, DUK_HTHREAD_THIS_PTR(thr)); if (h_str == NULL) { return DUK_RET_TYPE_ERROR; } if (duk_get_current_magic(thr) == 0) { /* .toString() */ duk_push_symbol_descriptive_string(thr, h_str); } else { /* .valueOf() */ duk_push_hstring(thr, h_str); } return 1; } DUK_INTERNAL duk_ret_t duk_bi_symbol_key_for(duk_hthread *thr) { duk_hstring *h; const duk_uint8_t *p; /* Argument must be a symbol but not checked here. The initial byte * check will catch non-symbol strings. */ h = duk_require_hstring(thr, 0); DUK_ASSERT(h != NULL); p = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h); DUK_ASSERT(p != NULL); /* Even for zero length strings there's at least one NUL byte so * we can safely check the initial byte. */ if (p[0] == 0x80) { /* Global symbol, return its key (bytes just after the initial byte). */ duk_push_lstring(thr, (const char *) (p + 1), (duk_size_t) (DUK_HSTRING_GET_BYTELEN(h) - 1)); return 1; } else if (p[0] == 0x81 || p[0] == 0x82 || p[0] == 0xff) { /* Local symbol or hidden symbol, return undefined. */ return 0; } /* Covers normal strings and unknown initial bytes. */ return DUK_RET_TYPE_ERROR; } DUK_INTERNAL duk_ret_t duk_bi_symbol_toprimitive(duk_hthread *thr) { duk_hstring *h_str; h_str = duk__auto_unbox_symbol(thr, DUK_HTHREAD_THIS_PTR(thr)); if (h_str == NULL) { return DUK_RET_TYPE_ERROR; } duk_push_hstring(thr, h_str); return 1; } #endif /* DUK_USE_SYMBOL_BUILTIN */ /* * Thread builtins */ /* #include duk_internal.h -> already included */ /* * Constructor */ #if defined(DUK_USE_COROUTINE_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_thread_constructor(duk_hthread *thr) { duk_hthread *new_thr; duk_hobject *func; /* Check that the argument is callable; this is not 100% because we * don't allow native functions to be a thread's initial function. * Resume will reject such functions in any case. */ /* XXX: need a duk_require_func_promote_lfunc() */ func = duk_require_hobject_promote_lfunc(thr, 0); DUK_ASSERT(func != NULL); duk_require_callable(thr, 0); duk_push_thread(thr); new_thr = (duk_hthread *) duk_known_hobject(thr, -1); new_thr->state = DUK_HTHREAD_STATE_INACTIVE; /* push initial function call to new thread stack; this is * picked up by resume(). */ duk_push_hobject(new_thr, func); return 1; /* return thread */ } #endif /* * Resume a thread. * * The thread must be in resumable state, either (a) new thread which hasn't * yet started, or (b) a thread which has previously yielded. This method * must be called from an ECMAScript function. * * Args: * - thread * - value * - isError (defaults to false) * * Note: yield and resume handling is currently asymmetric. */ #if defined(DUK_USE_COROUTINE_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_thread_resume(duk_hthread *ctx) { duk_hthread *thr = (duk_hthread *) ctx; duk_hthread *thr_resume; duk_hobject *caller_func; duk_small_uint_t is_error; DUK_DDD(DUK_DDDPRINT("Duktape.Thread.resume(): thread=%!T, value=%!T, is_error=%!T", (duk_tval *) duk_get_tval(thr, 0), (duk_tval *) duk_get_tval(thr, 1), (duk_tval *) duk_get_tval(thr, 2))); DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING); DUK_ASSERT(thr->heap->curr_thread == thr); thr_resume = duk_require_hthread(thr, 0); DUK_ASSERT(duk_get_top(thr) == 3); is_error = (duk_small_uint_t) duk_to_boolean_top_pop(thr); DUK_ASSERT(duk_get_top(thr) == 2); /* [ thread value ] */ /* * Thread state and calling context checks */ if (thr->callstack_top < 2) { DUK_DD(DUK_DDPRINT("resume state invalid: callstack should contain at least 2 entries (caller and Duktape.Thread.resume)")); goto state_error; } DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(thr->callstack_curr->parent != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr) != NULL); /* us */ DUK_ASSERT(DUK_HOBJECT_IS_NATFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr))); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr->parent) != NULL); /* caller */ caller_func = DUK_ACT_GET_FUNC(thr->callstack_curr->parent); if (!DUK_HOBJECT_IS_COMPFUNC(caller_func)) { DUK_DD(DUK_DDPRINT("resume state invalid: caller must be ECMAScript code")); goto state_error; } /* Note: there is no requirement that: 'thr->callstack_preventcount == 1' * like for yield. */ if (thr_resume->state != DUK_HTHREAD_STATE_INACTIVE && thr_resume->state != DUK_HTHREAD_STATE_YIELDED) { DUK_DD(DUK_DDPRINT("resume state invalid: target thread must be INACTIVE or YIELDED")); goto state_error; } DUK_ASSERT(thr_resume->state == DUK_HTHREAD_STATE_INACTIVE || thr_resume->state == DUK_HTHREAD_STATE_YIELDED); /* Further state-dependent pre-checks */ if (thr_resume->state == DUK_HTHREAD_STATE_YIELDED) { /* no pre-checks now, assume a previous yield() has left things in * tip-top shape (longjmp handler will assert for these). */ } else { duk_hobject *h_fun; DUK_ASSERT(thr_resume->state == DUK_HTHREAD_STATE_INACTIVE); /* The initial function must be an ECMAScript function (but * can be bound). We must make sure of that before we longjmp * because an error in the RESUME handler call processing will * not be handled very cleanly. */ if ((thr_resume->callstack_top != 0) || (thr_resume->valstack_top - thr_resume->valstack != 1)) { goto state_error; } duk_push_tval(thr, DUK_GET_TVAL_NEGIDX(thr_resume, -1)); duk_resolve_nonbound_function(thr); h_fun = duk_require_hobject(thr, -1); /* reject lightfuncs on purpose */ if (!DUK_HOBJECT_IS_CALLABLE(h_fun) || !DUK_HOBJECT_IS_COMPFUNC(h_fun)) { goto state_error; } duk_pop(thr); } #if 0 /* This check would prevent a heap destruction time finalizer from * launching a coroutine, which would ensure that during finalization * 'thr' would always equal heap_thread. Normal runtime finalizers * run with ms_running == 0, i.e. outside mark-and-sweep. See GH-2030. */ if (thr->heap->ms_running) { DUK_D(DUK_DPRINT("refuse Duktape.Thread.resume() when ms_running != 0")); goto state_error; } #endif /* * The error object has been augmented with a traceback and other * info from its creation point -- usually another thread. The * error handler is called here right before throwing, but it also * runs in the resumer's thread. It might be nice to get a traceback * from the resumee but this is not the case now. */ #if defined(DUK_USE_AUGMENT_ERROR_THROW) if (is_error) { DUK_ASSERT_TOP(thr, 2); /* value (error) is at stack top */ duk_err_augment_error_throw(thr); /* in resumer's context */ } #endif #if defined(DUK_USE_DEBUG) if (is_error) { DUK_DDD(DUK_DDDPRINT("RESUME ERROR: thread=%!T, value=%!T", (duk_tval *) duk_get_tval(thr, 0), (duk_tval *) duk_get_tval(thr, 1))); } else if (thr_resume->state == DUK_HTHREAD_STATE_YIELDED) { DUK_DDD(DUK_DDDPRINT("RESUME NORMAL: thread=%!T, value=%!T", (duk_tval *) duk_get_tval(thr, 0), (duk_tval *) duk_get_tval(thr, 1))); } else { DUK_DDD(DUK_DDDPRINT("RESUME INITIAL: thread=%!T, value=%!T", (duk_tval *) duk_get_tval(thr, 0), (duk_tval *) duk_get_tval(thr, 1))); } #endif thr->heap->lj.type = DUK_LJ_TYPE_RESUME; /* lj value2: thread */ DUK_ASSERT(thr->valstack_bottom < thr->valstack_top); DUK_TVAL_SET_TVAL_UPDREF(thr, &thr->heap->lj.value2, &thr->valstack_bottom[0]); /* side effects */ /* lj value1: value */ DUK_ASSERT(thr->valstack_bottom + 1 < thr->valstack_top); DUK_TVAL_SET_TVAL_UPDREF(thr, &thr->heap->lj.value1, &thr->valstack_bottom[1]); /* side effects */ DUK_TVAL_CHKFAST_INPLACE_SLOW(&thr->heap->lj.value1); thr->heap->lj.iserror = is_error; DUK_ASSERT(thr->heap->lj.jmpbuf_ptr != NULL); /* call is from executor, so we know we have a jmpbuf */ duk_err_longjmp(thr); /* execution resumes in bytecode executor */ DUK_UNREACHABLE(); /* Never here, fall through to error (from compiler point of view). */ state_error: DUK_DCERROR_TYPE_INVALID_STATE(thr); } #endif /* * Yield the current thread. * * The thread must be in yieldable state: it must have a resumer, and there * must not be any yield-preventing calls (native calls and constructor calls, * currently) in the thread's call stack (otherwise a resume would not be * possible later). This method must be called from an ECMAScript function. * * Args: * - value * - isError (defaults to false) * * Note: yield and resume handling is currently asymmetric. */ #if defined(DUK_USE_COROUTINE_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_thread_yield(duk_hthread *thr) { duk_hobject *caller_func; duk_small_uint_t is_error; DUK_DDD(DUK_DDDPRINT("Duktape.Thread.yield(): value=%!T, is_error=%!T", (duk_tval *) duk_get_tval(thr, 0), (duk_tval *) duk_get_tval(thr, 1))); DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING); DUK_ASSERT(thr->heap->curr_thread == thr); DUK_ASSERT(duk_get_top(thr) == 2); is_error = (duk_small_uint_t) duk_to_boolean_top_pop(thr); DUK_ASSERT(duk_get_top(thr) == 1); /* [ value ] */ /* * Thread state and calling context checks */ if (!thr->resumer) { DUK_DD(DUK_DDPRINT("yield state invalid: current thread must have a resumer")); goto state_error; } DUK_ASSERT(thr->resumer->state == DUK_HTHREAD_STATE_RESUMED); if (thr->callstack_top < 2) { DUK_DD(DUK_DDPRINT("yield state invalid: callstack should contain at least 2 entries (caller and Duktape.Thread.yield)")); goto state_error; } DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(thr->callstack_curr->parent != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr) != NULL); /* us */ DUK_ASSERT(DUK_HOBJECT_IS_NATFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr))); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr->parent) != NULL); /* caller */ caller_func = DUK_ACT_GET_FUNC(thr->callstack_curr->parent); if (!DUK_HOBJECT_IS_COMPFUNC(caller_func)) { DUK_DD(DUK_DDPRINT("yield state invalid: caller must be ECMAScript code")); goto state_error; } DUK_ASSERT(thr->callstack_preventcount >= 1); /* should never be zero, because we (Duktape.Thread.yield) are on the stack */ if (thr->callstack_preventcount != 1) { /* Note: the only yield-preventing call is Duktape.Thread.yield(), hence check for 1, not 0 */ DUK_DD(DUK_DDPRINT("yield state invalid: there must be no yield-preventing calls in current thread callstack (preventcount is %ld)", (long) thr->callstack_preventcount)); goto state_error; } /* * The error object has been augmented with a traceback and other * info from its creation point -- usually the current thread. * The error handler, however, is called right before throwing * and runs in the yielder's thread. */ #if defined(DUK_USE_AUGMENT_ERROR_THROW) if (is_error) { DUK_ASSERT_TOP(thr, 1); /* value (error) is at stack top */ duk_err_augment_error_throw(thr); /* in yielder's context */ } #endif #if defined(DUK_USE_DEBUG) if (is_error) { DUK_DDD(DUK_DDDPRINT("YIELD ERROR: value=%!T", (duk_tval *) duk_get_tval(thr, 0))); } else { DUK_DDD(DUK_DDDPRINT("YIELD NORMAL: value=%!T", (duk_tval *) duk_get_tval(thr, 0))); } #endif /* * Process yield * * After longjmp(), processing continues in bytecode executor longjmp * handler, which will e.g. update thr->resumer to NULL. */ thr->heap->lj.type = DUK_LJ_TYPE_YIELD; /* lj value1: value */ DUK_ASSERT(thr->valstack_bottom < thr->valstack_top); DUK_TVAL_SET_TVAL_UPDREF(thr, &thr->heap->lj.value1, &thr->valstack_bottom[0]); /* side effects */ DUK_TVAL_CHKFAST_INPLACE_SLOW(&thr->heap->lj.value1); thr->heap->lj.iserror = is_error; DUK_ASSERT(thr->heap->lj.jmpbuf_ptr != NULL); /* call is from executor, so we know we have a jmpbuf */ duk_err_longjmp(thr); /* execution resumes in bytecode executor */ DUK_UNREACHABLE(); /* Never here, fall through to error (from compiler point of view). */ state_error: DUK_DCERROR_TYPE_INVALID_STATE(thr); } #endif #if defined(DUK_USE_COROUTINE_SUPPORT) DUK_INTERNAL duk_ret_t duk_bi_thread_current(duk_hthread *thr) { duk_push_current_thread(thr); return 1; } #endif /* * Type error thrower, E5 Section 13.2.3. */ /* #include duk_internal.h -> already included */ DUK_INTERNAL duk_ret_t duk_bi_type_error_thrower(duk_hthread *thr) { DUK_DCERROR_TYPE_INVALID_ARGS(thr); } /* * Fixed buffer helper useful for debugging, requires no allocation * which is critical for debugging. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_DEBUG) DUK_INTERNAL void duk_fb_put_bytes(duk_fixedbuffer *fb, const duk_uint8_t *buffer, duk_size_t length) { duk_size_t avail; duk_size_t copylen; avail = (fb->offset >= fb->length ? (duk_size_t) 0 : (duk_size_t) (fb->length - fb->offset)); if (length > avail) { copylen = avail; fb->truncated = 1; } else { copylen = length; } duk_memcpy_unsafe(fb->buffer + fb->offset, buffer, copylen); fb->offset += copylen; } DUK_INTERNAL void duk_fb_put_byte(duk_fixedbuffer *fb, duk_uint8_t x) { duk_fb_put_bytes(fb, (const duk_uint8_t *) &x, 1); } DUK_INTERNAL void duk_fb_put_cstring(duk_fixedbuffer *fb, const char *x) { duk_fb_put_bytes(fb, (const duk_uint8_t *) x, (duk_size_t) DUK_STRLEN(x)); } DUK_INTERNAL void duk_fb_sprintf(duk_fixedbuffer *fb, const char *fmt, ...) { duk_size_t avail; va_list ap; va_start(ap, fmt); avail = (fb->offset >= fb->length ? (duk_size_t) 0 : (duk_size_t) (fb->length - fb->offset)); if (avail > 0) { duk_int_t res = (duk_int_t) DUK_VSNPRINTF((char *) (fb->buffer + fb->offset), avail, fmt, ap); if (res < 0) { /* error */ } else if ((duk_size_t) res >= avail) { /* (maybe) truncated */ fb->offset += avail; if ((duk_size_t) res > avail) { /* actual chars dropped (not just NUL term) */ fb->truncated = 1; } } else { /* normal */ fb->offset += (duk_size_t) res; } } va_end(ap); } DUK_INTERNAL void duk_fb_put_funcptr(duk_fixedbuffer *fb, duk_uint8_t *fptr, duk_size_t fptr_size) { char buf[64+1]; duk_debug_format_funcptr(buf, sizeof(buf), fptr, fptr_size); buf[sizeof(buf) - 1] = (char) 0; duk_fb_put_cstring(fb, buf); } DUK_INTERNAL duk_bool_t duk_fb_is_full(duk_fixedbuffer *fb) { return (fb->offset >= fb->length); } #endif /* DUK_USE_DEBUG */ /* * Custom formatter for debug printing, allowing Duktape specific data * structures (such as tagged values and heap objects) to be printed with * a nice format string. Because debug printing should not affect execution * state, formatting here must be independent of execution (see implications * below) and must not allocate memory. * * Custom format tags begin with a '%!' to safely distinguish them from * standard format tags. The following conversions are supported: * * %!T tagged value (duk_tval *) * %!O heap object (duk_heaphdr *) * %!I decoded bytecode instruction * %!X bytecode instruction opcode name (arg is long) * %!C catcher (duk_catcher *) * %!A activation (duk_activation *) * * Everything is serialized in a JSON-like manner. The default depth is one * level, internal prototype is not followed, and internal properties are not * serialized. The following modifiers change this behavior: * * @ print pointers * # print binary representations (where applicable) * d deep traversal of own properties (not prototype) * p follow prototype chain (useless without 'd') * i include internal properties (other than prototype) * x hexdump buffers * h heavy formatting * * For instance, the following serializes objects recursively, but does not * follow the prototype chain nor print internal properties: "%!dO". * * Notes: * * * Standard snprintf return value semantics seem to vary. This * implementation returns the number of bytes it actually wrote * (excluding the null terminator). If retval == buffer size, * output was truncated (except for corner cases). * * * Output format is intentionally different from ECMAScript * formatting requirements, as formatting here serves debugging * of internals. * * * Depth checking (and updating) is done in each type printer * separately, to allow them to call each other freely. * * * Some pathological structures might take ages to print (e.g. * self recursion with 100 properties pointing to the object * itself). To guard against these, each printer also checks * whether the output buffer is full; if so, early exit. * * * Reference loops are detected using a loop stack. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_DEBUG) /* #include stdio.h -> already included */ /* #include stdarg.h -> already included */ #include /* list of conversion specifiers that terminate a format tag; * this is unfortunately guesswork. */ #define DUK__ALLOWED_STANDARD_SPECIFIERS "diouxXeEfFgGaAcsCSpnm" /* maximum length of standard format tag that we support */ #define DUK__MAX_FORMAT_TAG_LENGTH 32 /* heapobj recursion depth when deep printing is selected */ #define DUK__DEEP_DEPTH_LIMIT 8 /* maximum recursion depth for loop detection stacks */ #define DUK__LOOP_STACK_DEPTH 256 /* must match bytecode defines now; build autogenerate? */ DUK_LOCAL const char * const duk__bc_optab[256] = { "LDREG", "STREG", "JUMP", "LDCONST", "LDINT", "LDINTX", "LDTHIS", "LDUNDEF", "LDNULL", "LDTRUE", "LDFALSE", "GETVAR", "BNOT", "LNOT", "UNM", "UNP", "EQ_RR", "EQ_CR", "EQ_RC", "EQ_CC", "NEQ_RR", "NEQ_CR", "NEQ_RC", "NEQ_CC", "SEQ_RR", "SEQ_CR", "SEQ_RC", "SEQ_CC", "SNEQ_RR", "SNEQ_CR", "SNEQ_RC", "SNEQ_CC", "GT_RR", "GT_CR", "GT_RC", "GT_CC", "GE_RR", "GE_CR", "GE_RC", "GE_CC", "LT_RR", "LT_CR", "LT_RC", "LT_CC", "LE_RR", "LE_CR", "LE_RC", "LE_CC", "IFTRUE_R", "IFTRUE_C", "IFFALSE_R", "IFFALSE_C", "ADD_RR", "ADD_CR", "ADD_RC", "ADD_CC", "SUB_RR", "SUB_CR", "SUB_RC", "SUB_CC", "MUL_RR", "MUL_CR", "MUL_RC", "MUL_CC", "DIV_RR", "DIV_CR", "DIV_RC", "DIV_CC", "MOD_RR", "MOD_CR", "MOD_RC", "MOD_CC", "EXP_RR", "EXP_CR", "EXP_RC", "EXP_CC", "BAND_RR", "BAND_CR", "BAND_RC", "BAND_CC", "BOR_RR", "BOR_CR", "BOR_RC", "BOR_CC", "BXOR_RR", "BXOR_CR", "BXOR_RC", "BXOR_CC", "BASL_RR", "BASL_CR", "BASL_RC", "BASL_CC", "BLSR_RR", "BLSR_CR", "BLSR_RC", "BLSR_CC", "BASR_RR", "BASR_CR", "BASR_RC", "BASR_CC", "INSTOF_RR", "INSTOF_CR", "INSTOF_RC", "INSTOF_CC", "IN_RR", "IN_CR", "IN_RC", "IN_CC", "GETPROP_RR", "GETPROP_CR", "GETPROP_RC", "GETPROP_CC", "PUTPROP_RR", "PUTPROP_CR", "PUTPROP_RC", "PUTPROP_CC", "DELPROP_RR", "DELPROP_CR", "DELPROP_RC", "DELPROP_CC", "PREINCR", "PREDECR", "POSTINCR", "POSTDECR", "PREINCV", "PREDECV", "POSTINCV", "POSTDECV", "PREINCP_RR", "PREINCP_CR", "PREINCP_RC", "PREINCP_CC", "PREDECP_RR", "PREDECP_CR", "PREDECP_RC", "PREDECP_CC", "POSTINCP_RR", "POSTINCP_CR", "POSTINCP_RC", "POSTINCP_CC", "POSTDECP_RR", "POSTDECP_CR", "POSTDECP_RC", "POSTDECP_CC", "DECLVAR_RR", "DECLVAR_CR", "DECLVAR_RC", "DECLVAR_CC", "REGEXP_RR", "REGEXP_RC", "REGEXP_CR", "REGEXP_CC", "CLOSURE", "TYPEOF", "TYPEOFID", "PUTVAR", "DELVAR", "RETREG", "RETUNDEF", "RETCONST", "RETCONSTN", "LABEL", "ENDLABEL", "BREAK", "CONTINUE", "TRYCATCH", "ENDTRY", "ENDCATCH", "ENDFIN", "THROW", "INVLHS", "CSREG", "CSVAR_RR", "CSVAR_CR", "CSVAR_RC", "CSVAR_CC", "CALL0", "CALL1", "CALL2", "CALL3", "CALL4", "CALL5", "CALL6", "CALL7", "CALL8", "CALL9", "CALL10", "CALL11", "CALL12", "CALL13", "CALL14", "CALL15", "NEWOBJ", "NEWARR", "MPUTOBJ", "MPUTOBJI", "INITSET", "INITGET", "MPUTARR", "MPUTARRI", "SETALEN", "INITENUM", "NEXTENUM", "NEWTARGET", "DEBUGGER", "NOP", "INVALID", "UNUSED207", "GETPROPC_RR", "GETPROPC_CR", "GETPROPC_RC", "GETPROPC_CC", "UNUSED212", "UNUSED213", "UNUSED214", "UNUSED215", "UNUSED216", "UNUSED217", "UNUSED218", "UNUSED219", "UNUSED220", "UNUSED221", "UNUSED222", "UNUSED223", "UNUSED224", "UNUSED225", "UNUSED226", "UNUSED227", "UNUSED228", "UNUSED229", "UNUSED230", "UNUSED231", "UNUSED232", "UNUSED233", "UNUSED234", "UNUSED235", "UNUSED236", "UNUSED237", "UNUSED238", "UNUSED239", "UNUSED240", "UNUSED241", "UNUSED242", "UNUSED243", "UNUSED244", "UNUSED245", "UNUSED246", "UNUSED247", "UNUSED248", "UNUSED249", "UNUSED250", "UNUSED251", "UNUSED252", "UNUSED253", "UNUSED254", "UNUSED255" }; typedef struct duk__dprint_state duk__dprint_state; struct duk__dprint_state { duk_fixedbuffer *fb; /* loop_stack_index could be perhaps be replaced by 'depth', but it's nice * to not couple these two mechanisms unnecessarily. */ duk_hobject *loop_stack[DUK__LOOP_STACK_DEPTH]; duk_int_t loop_stack_index; duk_int_t loop_stack_limit; duk_int_t depth; duk_int_t depth_limit; duk_bool_t pointer; duk_bool_t heavy; duk_bool_t binary; duk_bool_t follow_proto; duk_bool_t internal; duk_bool_t hexdump; }; /* helpers */ DUK_LOCAL_DECL void duk__print_hstring(duk__dprint_state *st, duk_hstring *k, duk_bool_t quotes); DUK_LOCAL_DECL void duk__print_hobject(duk__dprint_state *st, duk_hobject *h); DUK_LOCAL_DECL void duk__print_hbuffer(duk__dprint_state *st, duk_hbuffer *h); DUK_LOCAL_DECL void duk__print_tval(duk__dprint_state *st, duk_tval *tv); DUK_LOCAL_DECL void duk__print_instr(duk__dprint_state *st, duk_instr_t ins); DUK_LOCAL_DECL void duk__print_heaphdr(duk__dprint_state *st, duk_heaphdr *h); DUK_LOCAL_DECL void duk__print_shared_heaphdr(duk__dprint_state *st, duk_heaphdr *h); DUK_LOCAL_DECL void duk__print_shared_heaphdr_string(duk__dprint_state *st, duk_heaphdr_string *h); DUK_LOCAL void duk__print_shared_heaphdr(duk__dprint_state *st, duk_heaphdr *h) { duk_fixedbuffer *fb = st->fb; if (st->heavy) { duk_fb_sprintf(fb, "(%p)", (void *) h); } if (!h) { return; } if (st->binary) { duk_size_t i; duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET); for (i = 0; i < (duk_size_t) sizeof(*h); i++) { duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)h)[i]); } duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET); } #if defined(DUK_USE_REFERENCE_COUNTING) /* currently implicitly also DUK_USE_DOUBLE_LINKED_HEAP */ if (st->heavy) { duk_fb_sprintf(fb, "[h_next=%p,h_prev=%p,h_refcount=%lu,h_flags=%08lx,type=%ld," "reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]", (void *) DUK_HEAPHDR_GET_NEXT(NULL, h), (void *) DUK_HEAPHDR_GET_PREV(NULL, h), (unsigned long) DUK_HEAPHDR_GET_REFCOUNT(h), (unsigned long) DUK_HEAPHDR_GET_FLAGS(h), (long) DUK_HEAPHDR_GET_TYPE(h), (long) (DUK_HEAPHDR_HAS_REACHABLE(h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_TEMPROOT(h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_FINALIZABLE(h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_FINALIZED(h) ? 1 : 0)); } #else if (st->heavy) { duk_fb_sprintf(fb, "[h_next=%p,h_flags=%08lx,type=%ld,reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]", (void *) DUK_HEAPHDR_GET_NEXT(NULL, h), (unsigned long) DUK_HEAPHDR_GET_FLAGS(h), (long) DUK_HEAPHDR_GET_TYPE(h), (long) (DUK_HEAPHDR_HAS_REACHABLE(h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_TEMPROOT(h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_FINALIZABLE(h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_FINALIZED(h) ? 1 : 0)); } #endif } DUK_LOCAL void duk__print_shared_heaphdr_string(duk__dprint_state *st, duk_heaphdr_string *h) { duk_fixedbuffer *fb = st->fb; if (st->heavy) { duk_fb_sprintf(fb, "(%p)", (void *) h); } if (!h) { return; } if (st->binary) { duk_size_t i; duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET); for (i = 0; i < (duk_size_t) sizeof(*h); i++) { duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)h)[i]); } duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET); } #if defined(DUK_USE_REFERENCE_COUNTING) if (st->heavy) { duk_fb_sprintf(fb, "[h_refcount=%lu,h_flags=%08lx,type=%ld,reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h), (unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) h), (long) DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h), (long) (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_TEMPROOT((duk_heaphdr *) h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_FINALIZABLE((duk_heaphdr *) h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) h) ? 1 : 0)); } #else if (st->heavy) { duk_fb_sprintf(fb, "[h_flags=%08lx,type=%ld,reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]", (unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) h), (long) DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h), (long) (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_TEMPROOT((duk_heaphdr *) h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_FINALIZABLE((duk_heaphdr *) h) ? 1 : 0), (long) (DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) h) ? 1 : 0)); } #endif } DUK_LOCAL void duk__print_hstring(duk__dprint_state *st, duk_hstring *h, duk_bool_t quotes) { duk_fixedbuffer *fb = st->fb; const duk_uint8_t *p; const duk_uint8_t *p_end; /* terminal type: no depth check */ if (duk_fb_is_full(fb)) { return; } duk__print_shared_heaphdr_string(st, &h->hdr); if (!h) { duk_fb_put_cstring(fb, "NULL"); return; } p = DUK_HSTRING_GET_DATA(h); p_end = p + DUK_HSTRING_GET_BYTELEN(h); if (p_end > p && p[0] == DUK_ASC_UNDERSCORE) { /* If property key begins with underscore, encode it with * forced quotes (e.g. "_Foo") to distinguish it from encoded * internal properties (e.g. \x82Bar -> _Bar). */ quotes = 1; } if (quotes) { duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_DOUBLEQUOTE); } while (p < p_end) { duk_uint8_t ch = *p++; /* two special escapes: '\' and '"', other printables as is */ if (ch == '\\') { duk_fb_sprintf(fb, "\\\\"); } else if (ch == '"') { duk_fb_sprintf(fb, "\\\""); } else if (ch >= 0x20 && ch <= 0x7e) { duk_fb_put_byte(fb, ch); } else if (ch == 0x82 && !quotes) { /* encode \x82Bar as _Bar if no quotes are * applied, this is for readable internal keys. */ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_UNDERSCORE); } else { duk_fb_sprintf(fb, "\\x%02lx", (unsigned long) ch); } } if (quotes) { duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_DOUBLEQUOTE); } #if defined(DUK_USE_REFERENCE_COUNTING) /* XXX: limit to quoted strings only, to save keys from being cluttered? */ duk_fb_sprintf(fb, "/%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT(&h->hdr)); #endif } #define DUK__COMMA() do { \ if (first) { \ first = 0; \ } else { \ duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COMMA); \ } \ } while (0) DUK_LOCAL void duk__print_hobject(duk__dprint_state *st, duk_hobject *h) { duk_fixedbuffer *fb = st->fb; duk_uint_fast32_t i; duk_tval *tv; duk_hstring *key; duk_bool_t first = 1; const char *brace1 = "{"; const char *brace2 = "}"; duk_bool_t pushed_loopstack = 0; if (duk_fb_is_full(fb)) { return; } duk__print_shared_heaphdr(st, &h->hdr); if (h && DUK_HOBJECT_HAS_ARRAY_PART(h)) { brace1 = "["; brace2 = "]"; } if (!h) { duk_fb_put_cstring(fb, "NULL"); goto finished; } if (st->depth >= st->depth_limit) { const char *subtype = "generic"; if (DUK_HOBJECT_IS_COMPFUNC(h)) { subtype = "compfunc"; } else if (DUK_HOBJECT_IS_NATFUNC(h)) { subtype = "natfunc"; } else if (DUK_HOBJECT_IS_THREAD(h)) { subtype = "thread"; } else if (DUK_HOBJECT_IS_BUFOBJ(h)) { subtype = "bufobj"; } else if (DUK_HOBJECT_IS_ARRAY(h)) { subtype = "array"; } duk_fb_sprintf(fb, "%sobject/%s %p%s", (const char *) brace1, subtype, (void *) h, (const char *) brace2); return; } for (i = 0; i < (duk_uint_fast32_t) st->loop_stack_index; i++) { if (st->loop_stack[i] == h) { duk_fb_sprintf(fb, "%sLOOP:%p%s", (const char *) brace1, (void *) h, (const char *) brace2); return; } } /* after this, return paths should 'goto finished' for decrement */ st->depth++; if (st->loop_stack_index >= st->loop_stack_limit) { duk_fb_sprintf(fb, "%sOUT-OF-LOOP-STACK%s", (const char *) brace1, (const char *) brace2); goto finished; } st->loop_stack[st->loop_stack_index++] = h; pushed_loopstack = 1; /* * Notation: double underscore used for internal properties which are not * stored in the property allocation (e.g. '__valstack'). */ duk_fb_put_cstring(fb, brace1); if (DUK_HOBJECT_GET_PROPS(NULL, h)) { duk_uint32_t a_limit; a_limit = DUK_HOBJECT_GET_ASIZE(h); if (st->internal) { /* dump all allocated entries, unused entries print as 'unused', * note that these may extend beyond current 'length' and look * a bit funny. */ } else { /* leave out trailing 'unused' elements */ while (a_limit > 0) { tv = DUK_HOBJECT_A_GET_VALUE_PTR(NULL, h, a_limit - 1); if (!DUK_TVAL_IS_UNUSED(tv)) { break; } a_limit--; } } for (i = 0; i < a_limit; i++) { tv = DUK_HOBJECT_A_GET_VALUE_PTR(NULL, h, i); DUK__COMMA(); duk__print_tval(st, tv); } for (i = 0; i < DUK_HOBJECT_GET_ENEXT(h); i++) { key = DUK_HOBJECT_E_GET_KEY(NULL, h, i); if (!key) { continue; } if (!st->internal && DUK_HSTRING_HAS_HIDDEN(key)) { continue; } DUK__COMMA(); duk__print_hstring(st, key, 0); duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COLON); if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(NULL, h, i)) { duk_fb_sprintf(fb, "[get:%p,set:%p]", (void *) DUK_HOBJECT_E_GET_VALUE(NULL, h, i).a.get, (void *) DUK_HOBJECT_E_GET_VALUE(NULL, h, i).a.set); } else { tv = &DUK_HOBJECT_E_GET_VALUE(NULL, h, i).v; duk__print_tval(st, tv); } if (st->heavy) { duk_fb_sprintf(fb, "<%02lx>", (unsigned long) DUK_HOBJECT_E_GET_FLAGS(NULL, h, i)); } } } if (st->internal) { if (DUK_HOBJECT_IS_ARRAY(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__array:true"); } if (DUK_HOBJECT_HAS_EXTENSIBLE(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__extensible:true"); } if (DUK_HOBJECT_HAS_CONSTRUCTABLE(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__constructable:true"); } if (DUK_HOBJECT_HAS_BOUNDFUNC(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__boundfunc:true"); } if (DUK_HOBJECT_HAS_COMPFUNC(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__compfunc:true"); } if (DUK_HOBJECT_HAS_NATFUNC(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__natfunc:true"); } if (DUK_HOBJECT_HAS_BUFOBJ(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__bufobj:true"); } if (DUK_HOBJECT_IS_THREAD(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__thread:true"); } if (DUK_HOBJECT_HAS_ARRAY_PART(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__array_part:true"); } if (DUK_HOBJECT_HAS_STRICT(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__strict:true"); } if (DUK_HOBJECT_HAS_NOTAIL(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__notail:true"); } if (DUK_HOBJECT_HAS_NEWENV(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__newenv:true"); } if (DUK_HOBJECT_HAS_NAMEBINDING(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__namebinding:true"); } if (DUK_HOBJECT_HAS_CREATEARGS(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__createargs:true"); } if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_array:true"); } if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_stringobj:true"); } if (DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_arguments:true"); } if (DUK_HOBJECT_IS_BUFOBJ(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_bufobj:true"); } if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h)) { DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_proxyobj:true"); } } if (st->internal && DUK_HOBJECT_IS_ARRAY(h)) { duk_harray *a = (duk_harray *) h; DUK__COMMA(); duk_fb_sprintf(fb, "__length:%ld", (long) a->length); DUK__COMMA(); duk_fb_sprintf(fb, "__length_nonwritable:%ld", (long) a->length_nonwritable); } else if (st->internal && DUK_HOBJECT_IS_COMPFUNC(h)) { duk_hcompfunc *f = (duk_hcompfunc *) h; DUK__COMMA(); duk_fb_put_cstring(fb, "__data:"); duk__print_hbuffer(st, (duk_hbuffer *) DUK_HCOMPFUNC_GET_DATA(NULL, f)); DUK__COMMA(); duk_fb_put_cstring(fb, "__lexenv:"); duk__print_hobject(st, DUK_HCOMPFUNC_GET_LEXENV(NULL, f)); DUK__COMMA(); duk_fb_put_cstring(fb, "__varenv:"); duk__print_hobject(st, DUK_HCOMPFUNC_GET_VARENV(NULL, f)); DUK__COMMA(); duk_fb_sprintf(fb, "__nregs:%ld", (long) f->nregs); DUK__COMMA(); duk_fb_sprintf(fb, "__nargs:%ld", (long) f->nargs); #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK__COMMA(); duk_fb_sprintf(fb, "__start_line:%ld", (long) f->start_line); DUK__COMMA(); duk_fb_sprintf(fb, "__end_line:%ld", (long) f->end_line); #endif DUK__COMMA(); duk_fb_put_cstring(fb, "__data:"); duk__print_hbuffer(st, (duk_hbuffer *) DUK_HCOMPFUNC_GET_DATA(NULL, f)); } else if (st->internal && DUK_HOBJECT_IS_NATFUNC(h)) { duk_hnatfunc *f = (duk_hnatfunc *) h; DUK__COMMA(); duk_fb_sprintf(fb, "__func:"); duk_fb_put_funcptr(fb, (duk_uint8_t *) &f->func, sizeof(f->func)); DUK__COMMA(); duk_fb_sprintf(fb, "__nargs:%ld", (long) f->nargs); DUK__COMMA(); duk_fb_sprintf(fb, "__magic:%ld", (long) f->magic); } else if (st->internal && DUK_HOBJECT_IS_DECENV(h)) { duk_hdecenv *e = (duk_hdecenv *) h; DUK__COMMA(); duk_fb_sprintf(fb, "__thread:"); duk__print_hobject(st, (duk_hobject *) e->thread); DUK__COMMA(); duk_fb_sprintf(fb, "__varmap:"); duk__print_hobject(st, (duk_hobject *) e->varmap); DUK__COMMA(); duk_fb_sprintf(fb, "__regbase_byteoff:%ld", (long) e->regbase_byteoff); } else if (st->internal && DUK_HOBJECT_IS_OBJENV(h)) { duk_hobjenv *e = (duk_hobjenv *) h; DUK__COMMA(); duk_fb_sprintf(fb, "__target:"); duk__print_hobject(st, (duk_hobject *) e->target); DUK__COMMA(); duk_fb_sprintf(fb, "__has_this:%ld", (long) e->has_this); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) } else if (st->internal && DUK_HOBJECT_IS_BUFOBJ(h)) { duk_hbufobj *b = (duk_hbufobj *) h; DUK__COMMA(); duk_fb_sprintf(fb, "__buf:"); duk__print_hbuffer(st, (duk_hbuffer *) b->buf); DUK__COMMA(); duk_fb_sprintf(fb, "__buf_prop:"); duk__print_hobject(st, (duk_hobject *) b->buf_prop); DUK__COMMA(); duk_fb_sprintf(fb, "__offset:%ld", (long) b->offset); DUK__COMMA(); duk_fb_sprintf(fb, "__length:%ld", (long) b->length); DUK__COMMA(); duk_fb_sprintf(fb, "__shift:%ld", (long) b->shift); DUK__COMMA(); duk_fb_sprintf(fb, "__elemtype:%ld", (long) b->elem_type); #endif } else if (st->internal && DUK_HOBJECT_IS_PROXY(h)) { duk_hproxy *p = (duk_hproxy *) h; DUK__COMMA(); duk_fb_sprintf(fb, "__target:"); duk__print_hobject(st, p->target); DUK__COMMA(); duk_fb_sprintf(fb, "__handler:"); duk__print_hobject(st, p->handler); } else if (st->internal && DUK_HOBJECT_IS_THREAD(h)) { duk_hthread *t = (duk_hthread *) h; DUK__COMMA(); duk_fb_sprintf(fb, "__ptr_curr_pc:%p", (void *) t->ptr_curr_pc); DUK__COMMA(); duk_fb_sprintf(fb, "__heap:%p", (void *) t->heap); DUK__COMMA(); duk_fb_sprintf(fb, "__strict:%ld", (long) t->strict); DUK__COMMA(); duk_fb_sprintf(fb, "__state:%ld", (long) t->state); DUK__COMMA(); duk_fb_sprintf(fb, "__unused1:%ld", (long) t->unused1); DUK__COMMA(); duk_fb_sprintf(fb, "__unused2:%ld", (long) t->unused2); DUK__COMMA(); duk_fb_sprintf(fb, "__valstack:%p", (void *) t->valstack); DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_end:%p/%ld", (void *) t->valstack_end, (long) (t->valstack_end - t->valstack)); DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_alloc_end:%p/%ld", (void *) t->valstack_alloc_end, (long) (t->valstack_alloc_end - t->valstack)); DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_bottom:%p/%ld", (void *) t->valstack_bottom, (long) (t->valstack_bottom - t->valstack)); DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_top:%p/%ld", (void *) t->valstack_top, (long) (t->valstack_top - t->valstack)); DUK__COMMA(); duk_fb_sprintf(fb, "__callstack_curr:%p", (void *) t->callstack_curr); DUK__COMMA(); duk_fb_sprintf(fb, "__callstack_top:%ld", (long) t->callstack_top); DUK__COMMA(); duk_fb_sprintf(fb, "__callstack_preventcount:%ld", (long) t->callstack_preventcount); DUK__COMMA(); duk_fb_sprintf(fb, "__resumer:"); duk__print_hobject(st, (duk_hobject *) t->resumer); DUK__COMMA(); duk_fb_sprintf(fb, "__compile_ctx:%p", (void *) t->compile_ctx); #if defined(DUK_USE_INTERRUPT_COUNTER) DUK__COMMA(); duk_fb_sprintf(fb, "__interrupt_counter:%ld", (long) t->interrupt_counter); DUK__COMMA(); duk_fb_sprintf(fb, "__interrupt_init:%ld", (long) t->interrupt_init); #endif /* XXX: print built-ins array? */ } #if defined(DUK_USE_REFERENCE_COUNTING) if (st->internal) { DUK__COMMA(); duk_fb_sprintf(fb, "__refcount:%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h)); } #endif if (st->internal) { DUK__COMMA(); duk_fb_sprintf(fb, "__class:%ld", (long) DUK_HOBJECT_GET_CLASS_NUMBER(h)); } DUK__COMMA(); duk_fb_sprintf(fb, "__heapptr:%p", (void *) h); /* own pointer */ /* prototype should be last, for readability */ if (DUK_HOBJECT_GET_PROTOTYPE(NULL, h)) { if (st->follow_proto) { DUK__COMMA(); duk_fb_put_cstring(fb, "__prototype:"); duk__print_hobject(st, DUK_HOBJECT_GET_PROTOTYPE(NULL, h)); } else { DUK__COMMA(); duk_fb_sprintf(fb, "__prototype:%p", (void *) DUK_HOBJECT_GET_PROTOTYPE(NULL, h)); } } duk_fb_put_cstring(fb, brace2); #if defined(DUK_USE_HOBJECT_HASH_PART) if (st->heavy && DUK_HOBJECT_GET_HSIZE(h) > 0) { duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LANGLE); for (i = 0; i < DUK_HOBJECT_GET_HSIZE(h); i++) { duk_uint_t h_idx = DUK_HOBJECT_H_GET_INDEX(NULL, h, i); if (i > 0) { duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COMMA); } if (h_idx == DUK_HOBJECT_HASHIDX_UNUSED) { duk_fb_sprintf(fb, "u"); } else if (h_idx == DUK_HOBJECT_HASHIDX_DELETED) { duk_fb_sprintf(fb, "d"); } else { duk_fb_sprintf(fb, "%ld", (long) h_idx); } } duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RANGLE); } #endif finished: st->depth--; if (pushed_loopstack) { st->loop_stack_index--; st->loop_stack[st->loop_stack_index] = NULL; } } DUK_LOCAL void duk__print_hbuffer(duk__dprint_state *st, duk_hbuffer *h) { duk_fixedbuffer *fb = st->fb; duk_size_t i, n; duk_uint8_t *p; if (duk_fb_is_full(fb)) { return; } /* terminal type: no depth check */ if (!h) { duk_fb_put_cstring(fb, "NULL"); return; } if (DUK_HBUFFER_HAS_DYNAMIC(h)) { if (DUK_HBUFFER_HAS_EXTERNAL(h)) { duk_hbuffer_external *g = (duk_hbuffer_external *) h; duk_fb_sprintf(fb, "buffer:external:%p:%ld", (void *) DUK_HBUFFER_EXTERNAL_GET_DATA_PTR(NULL, g), (long) DUK_HBUFFER_EXTERNAL_GET_SIZE(g)); } else { duk_hbuffer_dynamic *g = (duk_hbuffer_dynamic *) h; duk_fb_sprintf(fb, "buffer:dynamic:%p:%ld", (void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(NULL, g), (long) DUK_HBUFFER_DYNAMIC_GET_SIZE(g)); } } else { duk_fb_sprintf(fb, "buffer:fixed:%ld", (long) DUK_HBUFFER_GET_SIZE(h)); } #if defined(DUK_USE_REFERENCE_COUNTING) duk_fb_sprintf(fb, "/%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT(&h->hdr)); #endif if (st->hexdump) { duk_fb_sprintf(fb, "=["); n = DUK_HBUFFER_GET_SIZE(h); p = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(NULL, h); for (i = 0; i < n; i++) { duk_fb_sprintf(fb, "%02lx", (unsigned long) p[i]); } duk_fb_sprintf(fb, "]"); } } DUK_LOCAL void duk__print_heaphdr(duk__dprint_state *st, duk_heaphdr *h) { duk_fixedbuffer *fb = st->fb; if (duk_fb_is_full(fb)) { return; } if (!h) { duk_fb_put_cstring(fb, "NULL"); return; } switch (DUK_HEAPHDR_GET_TYPE(h)) { case DUK_HTYPE_STRING: duk__print_hstring(st, (duk_hstring *) h, 1); break; case DUK_HTYPE_OBJECT: duk__print_hobject(st, (duk_hobject *) h); break; case DUK_HTYPE_BUFFER: duk__print_hbuffer(st, (duk_hbuffer *) h); break; default: duk_fb_sprintf(fb, "[unknown htype %ld]", (long) DUK_HEAPHDR_GET_TYPE(h)); break; } } DUK_LOCAL void duk__print_tval(duk__dprint_state *st, duk_tval *tv) { duk_fixedbuffer *fb = st->fb; if (duk_fb_is_full(fb)) { return; } /* depth check is done when printing an actual type */ if (st->heavy) { duk_fb_sprintf(fb, "(%p)", (void *) tv); } if (!tv) { duk_fb_put_cstring(fb, "NULL"); return; } if (st->binary) { duk_size_t i; duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET); for (i = 0; i < (duk_size_t) sizeof(*tv); i++) { duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)tv)[i]); } duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET); } if (st->heavy) { duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LANGLE); } switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNDEFINED: { duk_fb_put_cstring(fb, "undefined"); break; } case DUK_TAG_UNUSED: { duk_fb_put_cstring(fb, "unused"); break; } case DUK_TAG_NULL: { duk_fb_put_cstring(fb, "null"); break; } case DUK_TAG_BOOLEAN: { duk_fb_put_cstring(fb, DUK_TVAL_GET_BOOLEAN(tv) ? "true" : "false"); break; } case DUK_TAG_STRING: { /* Note: string is a terminal heap object, so no depth check here */ duk__print_hstring(st, DUK_TVAL_GET_STRING(tv), 1); break; } case DUK_TAG_OBJECT: { duk__print_hobject(st, DUK_TVAL_GET_OBJECT(tv)); break; } case DUK_TAG_BUFFER: { duk__print_hbuffer(st, DUK_TVAL_GET_BUFFER(tv)); break; } case DUK_TAG_POINTER: { duk_fb_sprintf(fb, "pointer:%p", (void *) DUK_TVAL_GET_POINTER(tv)); break; } case DUK_TAG_LIGHTFUNC: { duk_c_function func; duk_small_uint_t lf_flags; DUK_TVAL_GET_LIGHTFUNC(tv, func, lf_flags); duk_fb_sprintf(fb, "lightfunc:"); duk_fb_put_funcptr(fb, (duk_uint8_t *) &func, sizeof(func)); duk_fb_sprintf(fb, ":%04lx", (long) lf_flags); break; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); duk_fb_sprintf(fb, "%.18g_F", (double) DUK_TVAL_GET_NUMBER(tv)); break; #endif default: { /* IEEE double is approximately 16 decimal digits; print a couple extra */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); duk_fb_sprintf(fb, "%.18g", (double) DUK_TVAL_GET_NUMBER(tv)); break; } } if (st->heavy) { duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RANGLE); } } DUK_LOCAL void duk__print_instr(duk__dprint_state *st, duk_instr_t ins) { duk_fixedbuffer *fb = st->fb; duk_small_int_t op; const char *op_name; op = (duk_small_int_t) DUK_DEC_OP(ins); op_name = duk__bc_optab[op]; /* XXX: option to fix opcode length so it lines up nicely */ if (op == DUK_OP_JUMP) { duk_int_t diff1 = (duk_int_t) (DUK_DEC_ABC(ins) - DUK_BC_JUMP_BIAS); /* from next pc */ duk_int_t diff2 = diff1 + 1; /* from curr pc */ duk_fb_sprintf(fb, "%s %ld (to pc%c%ld)", (const char *) op_name, (long) diff1, (int) (diff2 >= 0 ? '+' : '-'), /* char format: use int */ (long) (diff2 >= 0 ? diff2 : -diff2)); } else { duk_fb_sprintf(fb, "%s %ld, %ld, %ld", (const char *) op_name, (long) DUK_DEC_A(ins), (long) DUK_DEC_B(ins), (long) DUK_DEC_C(ins)); } } DUK_LOCAL void duk__print_opcode(duk__dprint_state *st, duk_small_int_t opcode) { duk_fixedbuffer *fb = st->fb; if (opcode < DUK_BC_OP_MIN || opcode > DUK_BC_OP_MAX) { duk_fb_sprintf(fb, "?(%ld)", (long) opcode); } else { duk_fb_sprintf(fb, "%s", (const char *) duk__bc_optab[opcode]); } } DUK_LOCAL void duk__print_catcher(duk__dprint_state *st, duk_catcher *cat) { duk_fixedbuffer *fb = st->fb; if (duk_fb_is_full(fb)) { return; } if (!cat) { duk_fb_put_cstring(fb, "NULL"); return; } duk_fb_sprintf(fb, "[catcher ptr=%p parent=%p varname=%p pc_base=%p, idx_base=%ld, flags=0x%08lx]", (void *) cat, (void *) cat->parent, (void *) cat->h_varname, (void *) cat->pc_base, (long) cat->idx_base, (unsigned long) cat->flags); } DUK_LOCAL void duk__print_activation(duk__dprint_state *st, duk_activation *act) { duk_fixedbuffer *fb = st->fb; if (duk_fb_is_full(fb)) { return; } if (!act) { duk_fb_put_cstring(fb, "NULL"); return; } /* prev_caller: conditional, omitted on purpose, it's rarely used. */ /* prev_line: conditional, omitted on purpose (but would be nice). */ duk_fb_sprintf(fb, "[activation ptr=%p tv_func= func=%p parent=%p var_env=%p lex_env=%p cat=%p curr_pc=%p bottom_byteoff=%ld retval_byteoff=%ld reserve_byteoff=%ld flags=%ld]", (void *) act, (void *) act->func, (void *) act->parent, (void *) act->var_env, (void *) act->lex_env, (void *) act->cat, (void *) act->curr_pc, (long) act->bottom_byteoff, (long) act->retval_byteoff, (long) act->reserve_byteoff, (long) act->flags); } DUK_INTERNAL duk_int_t duk_debug_vsnprintf(char *str, duk_size_t size, const char *format, va_list ap) { duk_fixedbuffer fb; const char *p = format; const char *p_end = p + DUK_STRLEN(format); duk_int_t retval; duk_memzero(&fb, sizeof(fb)); fb.buffer = (duk_uint8_t *) str; fb.length = size; fb.offset = 0; fb.truncated = 0; while (p < p_end) { char ch = *p++; const char *p_begfmt = NULL; duk_bool_t got_exclamation = 0; duk_bool_t got_long = 0; /* %lf, %ld etc */ duk__dprint_state st; if (ch != DUK_ASC_PERCENT) { duk_fb_put_byte(&fb, (duk_uint8_t) ch); continue; } /* * Format tag parsing. Since we don't understand all the * possible format tags allowed, we just scan for a terminating * specifier and keep track of relevant modifiers that we do * understand. See man 3 printf. */ duk_memzero(&st, sizeof(st)); st.fb = &fb; st.depth = 0; st.depth_limit = 1; st.loop_stack_index = 0; st.loop_stack_limit = DUK__LOOP_STACK_DEPTH; p_begfmt = p - 1; while (p < p_end) { ch = *p++; if (ch == DUK_ASC_STAR) { /* unsupported: would consume multiple args */ goto format_error; } else if (ch == DUK_ASC_PERCENT) { duk_fb_put_byte(&fb, (duk_uint8_t) DUK_ASC_PERCENT); break; } else if (ch == DUK_ASC_EXCLAMATION) { got_exclamation = 1; } else if (!got_exclamation && ch == DUK_ASC_LC_L) { got_long = 1; } else if (got_exclamation && ch == DUK_ASC_LC_D) { st.depth_limit = DUK__DEEP_DEPTH_LIMIT; } else if (got_exclamation && ch == DUK_ASC_LC_P) { st.follow_proto = 1; } else if (got_exclamation && ch == DUK_ASC_LC_I) { st.internal = 1; } else if (got_exclamation && ch == DUK_ASC_LC_X) { st.hexdump = 1; } else if (got_exclamation && ch == DUK_ASC_LC_H) { st.heavy = 1; } else if (got_exclamation && ch == DUK_ASC_ATSIGN) { st.pointer = 1; } else if (got_exclamation && ch == DUK_ASC_HASH) { st.binary = 1; } else if (got_exclamation && ch == DUK_ASC_UC_T) { duk_tval *t = va_arg(ap, duk_tval *); if (st.pointer && !st.heavy) { duk_fb_sprintf(&fb, "(%p)", (void *) t); } duk__print_tval(&st, t); break; } else if (got_exclamation && ch == DUK_ASC_UC_O) { duk_heaphdr *t = va_arg(ap, duk_heaphdr *); if (st.pointer && !st.heavy) { duk_fb_sprintf(&fb, "(%p)", (void *) t); } duk__print_heaphdr(&st, t); break; } else if (got_exclamation && ch == DUK_ASC_UC_I) { duk_instr_t t = va_arg(ap, duk_instr_t); duk__print_instr(&st, t); break; } else if (got_exclamation && ch == DUK_ASC_UC_X) { long t = va_arg(ap, long); duk__print_opcode(&st, (duk_small_int_t) t); break; } else if (got_exclamation && ch == DUK_ASC_UC_C) { duk_catcher *t = va_arg(ap, duk_catcher *); duk__print_catcher(&st, t); break; } else if (got_exclamation && ch == DUK_ASC_UC_A) { duk_activation *t = va_arg(ap, duk_activation *); duk__print_activation(&st, t); break; } else if (!got_exclamation && strchr(DUK__ALLOWED_STANDARD_SPECIFIERS, (int) ch)) { char fmtbuf[DUK__MAX_FORMAT_TAG_LENGTH]; duk_size_t fmtlen; DUK_ASSERT(p >= p_begfmt); fmtlen = (duk_size_t) (p - p_begfmt); if (fmtlen >= sizeof(fmtbuf)) { /* format is too large, abort */ goto format_error; } duk_memzero(fmtbuf, sizeof(fmtbuf)); duk_memcpy(fmtbuf, p_begfmt, fmtlen); /* assume exactly 1 arg, which is why '*' is forbidden; arg size still * depends on type though. */ if (ch == DUK_ASC_LC_F || ch == DUK_ASC_LC_G || ch == DUK_ASC_LC_E) { /* %f and %lf both consume a 'long' */ double arg = va_arg(ap, double); duk_fb_sprintf(&fb, fmtbuf, arg); } else if (ch == DUK_ASC_LC_D && got_long) { /* %ld */ long arg = va_arg(ap, long); duk_fb_sprintf(&fb, fmtbuf, arg); } else if (ch == DUK_ASC_LC_D) { /* %d; only 16 bits are guaranteed */ int arg = va_arg(ap, int); duk_fb_sprintf(&fb, fmtbuf, arg); } else if (ch == DUK_ASC_LC_U && got_long) { /* %lu */ unsigned long arg = va_arg(ap, unsigned long); duk_fb_sprintf(&fb, fmtbuf, arg); } else if (ch == DUK_ASC_LC_U) { /* %u; only 16 bits are guaranteed */ unsigned int arg = va_arg(ap, unsigned int); duk_fb_sprintf(&fb, fmtbuf, arg); } else if (ch == DUK_ASC_LC_X && got_long) { /* %lx */ unsigned long arg = va_arg(ap, unsigned long); duk_fb_sprintf(&fb, fmtbuf, arg); } else if (ch == DUK_ASC_LC_X) { /* %x; only 16 bits are guaranteed */ unsigned int arg = va_arg(ap, unsigned int); duk_fb_sprintf(&fb, fmtbuf, arg); } else if (ch == DUK_ASC_LC_S) { /* %s */ const char *arg = va_arg(ap, const char *); if (arg == NULL) { /* '%s' and NULL is not portable, so special case * it for debug printing. */ duk_fb_sprintf(&fb, "NULL"); } else { duk_fb_sprintf(&fb, fmtbuf, arg); } } else if (ch == DUK_ASC_LC_P) { /* %p */ void *arg = va_arg(ap, void *); if (arg == NULL) { /* '%p' and NULL is portable, but special case it * anyway to get a standard NULL marker in logs. */ duk_fb_sprintf(&fb, "NULL"); } else { duk_fb_sprintf(&fb, fmtbuf, arg); } } else if (ch == DUK_ASC_LC_C) { /* '%c', passed concretely as int */ int arg = va_arg(ap, int); duk_fb_sprintf(&fb, fmtbuf, arg); } else { /* Should not happen. */ duk_fb_sprintf(&fb, "INVALID-FORMAT(%s)", (const char *) fmtbuf); } break; } else { /* ignore */ } } } goto done; format_error: duk_fb_put_cstring(&fb, "FMTERR"); /* fall through */ done: retval = (duk_int_t) fb.offset; duk_fb_put_byte(&fb, (duk_uint8_t) 0); /* return total chars written excluding terminator */ return retval; } #if 0 /*unused*/ DUK_INTERNAL duk_int_t duk_debug_snprintf(char *str, duk_size_t size, const char *format, ...) { duk_int_t retval; va_list ap; va_start(ap, format); retval = duk_debug_vsnprintf(str, size, format, ap); va_end(ap); return retval; } #endif /* Formatting function pointers is tricky: there is no standard pointer for * function pointers and the size of a function pointer may depend on the * specific pointer type. This helper formats a function pointer based on * its memory layout to get something useful on most platforms. */ DUK_INTERNAL void duk_debug_format_funcptr(char *buf, duk_size_t buf_size, duk_uint8_t *fptr, duk_size_t fptr_size) { duk_size_t i; duk_uint8_t *p = (duk_uint8_t *) buf; duk_uint8_t *p_end = (duk_uint8_t *) (buf + buf_size - 1); DUK_ASSERT(buf != NULL); duk_memzero(buf, buf_size); for (i = 0; i < fptr_size; i++) { duk_int_t left = (duk_int_t) (p_end - p); duk_uint8_t ch; if (left <= 0) { break; } /* Quite approximate but should be useful for little and big endian. */ #if defined(DUK_USE_INTEGER_BE) ch = fptr[i]; #else ch = fptr[fptr_size - 1 - i]; #endif p += DUK_SNPRINTF((char *) p, (duk_size_t) left, "%02lx", (unsigned long) ch); } } #endif /* DUK_USE_DEBUG */ /* automatic undefs */ #undef DUK__ALLOWED_STANDARD_SPECIFIERS #undef DUK__COMMA #undef DUK__DEEP_DEPTH_LIMIT #undef DUK__LOOP_STACK_DEPTH #undef DUK__MAX_FORMAT_TAG_LENGTH /* * Duktape debugger */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_DEBUGGER_SUPPORT) /* * Assert helpers */ #if defined(DUK_USE_ASSERTIONS) #define DUK__DBG_TPORT_ENTER() do { \ DUK_ASSERT(heap->dbg_calling_transport == 0); \ heap->dbg_calling_transport = 1; \ } while (0) #define DUK__DBG_TPORT_EXIT() do { \ DUK_ASSERT(heap->dbg_calling_transport == 1); \ heap->dbg_calling_transport = 0; \ } while (0) #else #define DUK__DBG_TPORT_ENTER() do {} while (0) #define DUK__DBG_TPORT_EXIT() do {} while (0) #endif /* * Helper structs */ typedef union { void *p; duk_uint_t b[1]; /* Use b[] to access the size of the union, which is strictly not * correct. Can't use fixed size unless there's feature detection * for pointer byte size. */ } duk__ptr_union; /* * Detach handling */ #define DUK__SET_CONN_BROKEN(thr,reason) do { \ /* For now shared handler is fine. */ \ duk__debug_do_detach1((thr)->heap, (reason)); \ } while (0) DUK_LOCAL void duk__debug_do_detach1(duk_heap *heap, duk_int_t reason) { /* Can be called multiple times with no harm. Mark the transport * bad (dbg_read_cb == NULL) and clear state except for the detached * callback and the udata field. The detached callback is delayed * to the message loop so that it can be called between messages; * this avoids corner cases related to immediate debugger reattach * inside the detached callback. */ if (heap->dbg_detaching) { DUK_D(DUK_DPRINT("debugger already detaching, ignore detach1")); return; } DUK_D(DUK_DPRINT("debugger transport detaching, marking transport broken")); heap->dbg_detaching = 1; /* prevent multiple in-progress detaches */ if (heap->dbg_write_cb != NULL) { duk_hthread *thr; thr = heap->heap_thread; DUK_ASSERT(thr != NULL); duk_debug_write_notify(thr, DUK_DBG_CMD_DETACHING); duk_debug_write_int(thr, reason); duk_debug_write_eom(thr); } heap->dbg_read_cb = NULL; heap->dbg_write_cb = NULL; heap->dbg_peek_cb = NULL; heap->dbg_read_flush_cb = NULL; heap->dbg_write_flush_cb = NULL; heap->dbg_request_cb = NULL; /* heap->dbg_detached_cb: keep */ /* heap->dbg_udata: keep */ /* heap->dbg_processing: keep on purpose to avoid debugger re-entry in detaching state */ heap->dbg_state_dirty = 0; heap->dbg_force_restart = 0; heap->dbg_pause_flags = 0; heap->dbg_pause_act = NULL; heap->dbg_pause_startline = 0; heap->dbg_have_next_byte = 0; duk_debug_clear_paused(heap); /* XXX: some overlap with field inits above */ heap->dbg_state_dirty = 0; /* XXX: clear_paused sets dirty; rework? */ /* Ensure there are no stale active breakpoint pointers. * Breakpoint list is currently kept - we could empty it * here but we'd need to handle refcounts correctly, and * we'd need a 'thr' reference for that. * * XXX: clear breakpoint on either attach or detach? */ heap->dbg_breakpoints_active[0] = (duk_breakpoint *) NULL; } DUK_LOCAL void duk__debug_do_detach2(duk_heap *heap) { duk_debug_detached_function detached_cb; void *detached_udata; duk_hthread *thr; thr = heap->heap_thread; if (thr == NULL) { DUK_ASSERT(heap->dbg_detached_cb == NULL); return; } /* Safe to call multiple times. */ detached_cb = heap->dbg_detached_cb; detached_udata = heap->dbg_udata; heap->dbg_detached_cb = NULL; heap->dbg_udata = NULL; if (detached_cb) { /* Careful here: state must be wiped before the call * so that we can cleanly handle a re-attach from * inside the callback. */ DUK_D(DUK_DPRINT("detached during message loop, delayed call to detached_cb")); detached_cb(thr, detached_udata); } heap->dbg_detaching = 0; } DUK_INTERNAL void duk_debug_do_detach(duk_heap *heap) { duk__debug_do_detach1(heap, 0); duk__debug_do_detach2(heap); } /* Called on a read/write error: NULL all callbacks except the detached * callback so that we never accidentally call them after a read/write * error has been indicated. This is especially important for the transport * I/O callbacks to fulfill guaranteed callback semantics. */ DUK_LOCAL void duk__debug_null_most_callbacks(duk_hthread *thr) { duk_heap *heap; DUK_ASSERT(thr != NULL); heap = thr->heap; DUK_D(DUK_DPRINT("transport read/write error, NULL all callbacks expected detached")); heap->dbg_read_cb = NULL; heap->dbg_write_cb = NULL; /* this is especially critical to avoid another write call in detach1() */ heap->dbg_peek_cb = NULL; heap->dbg_read_flush_cb = NULL; heap->dbg_write_flush_cb = NULL; heap->dbg_request_cb = NULL; /* keep heap->dbg_detached_cb */ } /* * Pause handling */ DUK_LOCAL void duk__debug_set_pause_state(duk_hthread *thr, duk_heap *heap, duk_small_uint_t pause_flags) { duk_uint_fast32_t line; line = duk_debug_curr_line(thr); if (line == 0) { /* No line info for current function. */ duk_small_uint_t updated_flags; updated_flags = pause_flags & ~(DUK_PAUSE_FLAG_LINE_CHANGE); DUK_D(DUK_DPRINT("no line info for current activation, disable line-based pause flags: 0x%08lx -> 0x%08lx", (long) pause_flags, (long) updated_flags)); pause_flags = updated_flags; } heap->dbg_pause_flags = pause_flags; heap->dbg_pause_act = thr->callstack_curr; heap->dbg_pause_startline = (duk_uint32_t) line; heap->dbg_state_dirty = 1; DUK_D(DUK_DPRINT("set state for automatic pause triggers, flags=0x%08lx, act=%p, startline=%ld", (long) heap->dbg_pause_flags, (void *) heap->dbg_pause_act, (long) heap->dbg_pause_startline)); } /* * Debug connection peek and flush primitives */ DUK_INTERNAL duk_bool_t duk_debug_read_peek(duk_hthread *thr) { duk_heap *heap; duk_bool_t ret; DUK_ASSERT(thr != NULL); heap = thr->heap; DUK_ASSERT(heap != NULL); if (heap->dbg_read_cb == NULL) { DUK_D(DUK_DPRINT("attempt to peek in detached state, return zero (= no data)")); return 0; } if (heap->dbg_peek_cb == NULL) { DUK_DD(DUK_DDPRINT("no peek callback, return zero (= no data)")); return 0; } DUK__DBG_TPORT_ENTER(); ret = (duk_bool_t) (heap->dbg_peek_cb(heap->dbg_udata) > 0); DUK__DBG_TPORT_EXIT(); return ret; } DUK_INTERNAL void duk_debug_read_flush(duk_hthread *thr) { duk_heap *heap; DUK_ASSERT(thr != NULL); heap = thr->heap; DUK_ASSERT(heap != NULL); if (heap->dbg_read_cb == NULL) { DUK_D(DUK_DPRINT("attempt to read flush in detached state, ignore")); return; } if (heap->dbg_read_flush_cb == NULL) { DUK_DD(DUK_DDPRINT("no read flush callback, ignore")); return; } DUK__DBG_TPORT_ENTER(); heap->dbg_read_flush_cb(heap->dbg_udata); DUK__DBG_TPORT_EXIT(); } DUK_INTERNAL void duk_debug_write_flush(duk_hthread *thr) { duk_heap *heap; DUK_ASSERT(thr != NULL); heap = thr->heap; DUK_ASSERT(heap != NULL); if (heap->dbg_read_cb == NULL) { DUK_D(DUK_DPRINT("attempt to write flush in detached state, ignore")); return; } if (heap->dbg_write_flush_cb == NULL) { DUK_DD(DUK_DDPRINT("no write flush callback, ignore")); return; } DUK__DBG_TPORT_ENTER(); heap->dbg_write_flush_cb(heap->dbg_udata); DUK__DBG_TPORT_EXIT(); } /* * Debug connection skip primitives */ /* Skip fully. */ DUK_INTERNAL void duk_debug_skip_bytes(duk_hthread *thr, duk_size_t length) { duk_uint8_t dummy[64]; duk_size_t now; DUK_ASSERT(thr != NULL); while (length > 0) { now = (length > sizeof(dummy) ? sizeof(dummy) : length); duk_debug_read_bytes(thr, dummy, now); length -= now; } } DUK_INTERNAL void duk_debug_skip_byte(duk_hthread *thr) { DUK_ASSERT(thr != NULL); (void) duk_debug_read_byte(thr); } /* * Debug connection read primitives */ /* Peek ahead in the stream one byte. */ DUK_INTERNAL uint8_t duk_debug_peek_byte(duk_hthread *thr) { /* It is important not to call this if the last byte read was an EOM. * Reading ahead in this scenario would cause unnecessary blocking if * another message is not available. */ duk_uint8_t x; x = duk_debug_read_byte(thr); thr->heap->dbg_have_next_byte = 1; thr->heap->dbg_next_byte = x; return x; } /* Read fully. */ DUK_INTERNAL void duk_debug_read_bytes(duk_hthread *thr, duk_uint8_t *data, duk_size_t length) { duk_heap *heap; duk_uint8_t *p; duk_size_t left; duk_size_t got; DUK_ASSERT(thr != NULL); heap = thr->heap; DUK_ASSERT(heap != NULL); DUK_ASSERT(data != NULL); if (heap->dbg_read_cb == NULL) { DUK_D(DUK_DPRINT("attempt to read %ld bytes in detached state, return zero data", (long) length)); goto fail; } /* NOTE: length may be zero */ p = data; if (length >= 1 && heap->dbg_have_next_byte) { heap->dbg_have_next_byte = 0; *p++ = heap->dbg_next_byte; } for (;;) { left = (duk_size_t) ((data + length) - p); if (left == 0) { break; } DUK_ASSERT(heap->dbg_read_cb != NULL); DUK_ASSERT(left >= 1); #if defined(DUK_USE_DEBUGGER_TRANSPORT_TORTURE) left = 1; #endif DUK__DBG_TPORT_ENTER(); got = heap->dbg_read_cb(heap->dbg_udata, (char *) p, left); DUK__DBG_TPORT_EXIT(); if (got == 0 || got > left) { DUK_D(DUK_DPRINT("connection error during read, return zero data")); duk__debug_null_most_callbacks(thr); /* avoid calling write callback in detach1() */ DUK__SET_CONN_BROKEN(thr, 1); goto fail; } p += got; } return; fail: duk_memzero((void *) data, (size_t) length); } DUK_INTERNAL duk_uint8_t duk_debug_read_byte(duk_hthread *thr) { duk_uint8_t x; x = 0; /* just in case callback is broken and won't write 'x' */ duk_debug_read_bytes(thr, &x, 1); return x; } DUK_LOCAL duk_uint32_t duk__debug_read_uint32_raw(duk_hthread *thr) { duk_uint8_t buf[4]; DUK_ASSERT(thr != NULL); duk_debug_read_bytes(thr, buf, 4); return ((duk_uint32_t) buf[0] << 24) | ((duk_uint32_t) buf[1] << 16) | ((duk_uint32_t) buf[2] << 8) | (duk_uint32_t) buf[3]; } DUK_LOCAL duk_int32_t duk__debug_read_int32_raw(duk_hthread *thr) { return (duk_int32_t) duk__debug_read_uint32_raw(thr); } DUK_LOCAL duk_uint16_t duk__debug_read_uint16_raw(duk_hthread *thr) { duk_uint8_t buf[2]; DUK_ASSERT(thr != NULL); duk_debug_read_bytes(thr, buf, 2); return ((duk_uint16_t) buf[0] << 8) | (duk_uint16_t) buf[1]; } DUK_INTERNAL duk_int32_t duk_debug_read_int(duk_hthread *thr) { duk_small_uint_t x; duk_small_uint_t t; DUK_ASSERT(thr != NULL); x = duk_debug_read_byte(thr); if (x >= 0xc0) { t = duk_debug_read_byte(thr); return (duk_int32_t) (((x - 0xc0) << 8) + t); } else if (x >= 0x80) { return (duk_int32_t) (x - 0x80); } else if (x == DUK_DBG_IB_INT4) { return (duk_int32_t) duk__debug_read_uint32_raw(thr); } DUK_D(DUK_DPRINT("debug connection error: failed to decode int")); DUK__SET_CONN_BROKEN(thr, 1); return 0; } DUK_LOCAL duk_hstring *duk__debug_read_hstring_raw(duk_hthread *thr, duk_uint32_t len) { duk_uint8_t buf[31]; duk_uint8_t *p; if (len <= sizeof(buf)) { duk_debug_read_bytes(thr, buf, (duk_size_t) len); duk_push_lstring(thr, (const char *) buf, (duk_size_t) len); } else { p = (duk_uint8_t *) duk_push_fixed_buffer(thr, (duk_size_t) len); /* zero for paranoia */ DUK_ASSERT(p != NULL); duk_debug_read_bytes(thr, p, (duk_size_t) len); (void) duk_buffer_to_string(thr, -1); /* Safety relies on debug client, which is OK. */ } return duk_require_hstring(thr, -1); } DUK_INTERNAL duk_hstring *duk_debug_read_hstring(duk_hthread *thr) { duk_small_uint_t x; duk_uint32_t len; DUK_ASSERT(thr != NULL); x = duk_debug_read_byte(thr); if (x >= 0x60 && x <= 0x7f) { /* For short strings, use a fixed temp buffer. */ len = (duk_uint32_t) (x - 0x60); } else if (x == DUK_DBG_IB_STR2) { len = (duk_uint32_t) duk__debug_read_uint16_raw(thr); } else if (x == DUK_DBG_IB_STR4) { len = (duk_uint32_t) duk__debug_read_uint32_raw(thr); } else { goto fail; } return duk__debug_read_hstring_raw(thr, len); fail: DUK_D(DUK_DPRINT("debug connection error: failed to decode int")); DUK__SET_CONN_BROKEN(thr, 1); duk_push_hstring_empty(thr); /* always push some string */ return duk_require_hstring(thr, -1); } DUK_LOCAL duk_hbuffer *duk__debug_read_hbuffer_raw(duk_hthread *thr, duk_uint32_t len) { duk_uint8_t *p; p = (duk_uint8_t *) duk_push_fixed_buffer(thr, (duk_size_t) len); /* zero for paranoia */ DUK_ASSERT(p != NULL); duk_debug_read_bytes(thr, p, (duk_size_t) len); return duk_require_hbuffer(thr, -1); } DUK_LOCAL void *duk__debug_read_pointer_raw(duk_hthread *thr) { duk_small_uint_t x; duk__ptr_union pu; DUK_ASSERT(thr != NULL); x = duk_debug_read_byte(thr); if (x != sizeof(pu)) { goto fail; } duk_debug_read_bytes(thr, (duk_uint8_t *) &pu.p, sizeof(pu)); #if defined(DUK_USE_INTEGER_LE) duk_byteswap_bytes((duk_uint8_t *) pu.b, sizeof(pu)); #endif return (void *) pu.p; fail: DUK_D(DUK_DPRINT("debug connection error: failed to decode pointer")); DUK__SET_CONN_BROKEN(thr, 1); return (void *) NULL; } DUK_LOCAL duk_double_t duk__debug_read_double_raw(duk_hthread *thr) { duk_double_union du; DUK_ASSERT(sizeof(du.uc) == 8); duk_debug_read_bytes(thr, (duk_uint8_t *) du.uc, sizeof(du.uc)); DUK_DBLUNION_DOUBLE_NTOH(&du); return du.d; } #if 0 DUK_INTERNAL duk_heaphdr *duk_debug_read_heapptr(duk_hthread *thr) { duk_small_uint_t x; DUK_ASSERT(thr != NULL); x = duk_debug_read_byte(thr); if (x != DUK_DBG_IB_HEAPPTR) { goto fail; } return (duk_heaphdr *) duk__debug_read_pointer_raw(thr); fail: DUK_D(DUK_DPRINT("debug connection error: failed to decode heapptr")); DUK__SET_CONN_BROKEN(thr, 1); return NULL; } #endif DUK_INTERNAL duk_heaphdr *duk_debug_read_any_ptr(duk_hthread *thr) { duk_small_uint_t x; DUK_ASSERT(thr != NULL); x = duk_debug_read_byte(thr); switch (x) { case DUK_DBG_IB_OBJECT: case DUK_DBG_IB_POINTER: case DUK_DBG_IB_HEAPPTR: /* Accept any pointer-like value; for 'object' dvalue, read * and ignore the class number. */ if (x == DUK_DBG_IB_OBJECT) { duk_debug_skip_byte(thr); } break; default: goto fail; } return (duk_heaphdr *) duk__debug_read_pointer_raw(thr); fail: DUK_D(DUK_DPRINT("debug connection error: failed to decode any pointer (object, pointer, heapptr)")); DUK__SET_CONN_BROKEN(thr, 1); return NULL; } DUK_INTERNAL duk_tval *duk_debug_read_tval(duk_hthread *thr) { duk_uint8_t x; duk_uint_t t; duk_uint32_t len; DUK_ASSERT(thr != NULL); x = duk_debug_read_byte(thr); if (x >= 0xc0) { t = (duk_uint_t) (x - 0xc0); t = (t << 8) + duk_debug_read_byte(thr); duk_push_uint(thr, (duk_uint_t) t); goto return_ptr; } if (x >= 0x80) { duk_push_uint(thr, (duk_uint_t) (x - 0x80)); goto return_ptr; } if (x >= 0x60) { len = (duk_uint32_t) (x - 0x60); duk__debug_read_hstring_raw(thr, len); goto return_ptr; } switch (x) { case DUK_DBG_IB_INT4: { duk_int32_t i = duk__debug_read_int32_raw(thr); duk_push_i32(thr, i); break; } case DUK_DBG_IB_STR4: { len = duk__debug_read_uint32_raw(thr); duk__debug_read_hstring_raw(thr, len); break; } case DUK_DBG_IB_STR2: { len = duk__debug_read_uint16_raw(thr); duk__debug_read_hstring_raw(thr, len); break; } case DUK_DBG_IB_BUF4: { len = duk__debug_read_uint32_raw(thr); duk__debug_read_hbuffer_raw(thr, len); break; } case DUK_DBG_IB_BUF2: { len = duk__debug_read_uint16_raw(thr); duk__debug_read_hbuffer_raw(thr, len); break; } case DUK_DBG_IB_UNDEFINED: { duk_push_undefined(thr); break; } case DUK_DBG_IB_NULL: { duk_push_null(thr); break; } case DUK_DBG_IB_TRUE: { duk_push_true(thr); break; } case DUK_DBG_IB_FALSE: { duk_push_false(thr); break; } case DUK_DBG_IB_NUMBER: { duk_double_t d; d = duk__debug_read_double_raw(thr); duk_push_number(thr, d); break; } case DUK_DBG_IB_OBJECT: { duk_heaphdr *h; duk_debug_skip_byte(thr); h = (duk_heaphdr *) duk__debug_read_pointer_raw(thr); duk_push_heapptr(thr, (void *) h); break; } case DUK_DBG_IB_POINTER: { void *ptr; ptr = duk__debug_read_pointer_raw(thr); duk_push_pointer(thr, ptr); break; } case DUK_DBG_IB_LIGHTFUNC: { /* XXX: Not needed for now, so not implemented. Note that * function pointers may have different size/layout than * a void pointer. */ DUK_D(DUK_DPRINT("reading lightfunc values unimplemented")); goto fail; } case DUK_DBG_IB_HEAPPTR: { duk_heaphdr *h; h = (duk_heaphdr *) duk__debug_read_pointer_raw(thr); duk_push_heapptr(thr, (void *) h); break; } case DUK_DBG_IB_UNUSED: /* unused: not accepted in inbound messages */ default: goto fail; } return_ptr: return DUK_GET_TVAL_NEGIDX(thr, -1); fail: DUK_D(DUK_DPRINT("debug connection error: failed to decode tval")); DUK__SET_CONN_BROKEN(thr, 1); return NULL; } /* * Debug connection write primitives */ /* Write fully. */ DUK_INTERNAL void duk_debug_write_bytes(duk_hthread *thr, const duk_uint8_t *data, duk_size_t length) { duk_heap *heap; const duk_uint8_t *p; duk_size_t left; duk_size_t got; DUK_ASSERT(thr != NULL); DUK_ASSERT(length == 0 || data != NULL); heap = thr->heap; DUK_ASSERT(heap != NULL); if (heap->dbg_write_cb == NULL) { DUK_D(DUK_DPRINT("attempt to write %ld bytes in detached state, ignore", (long) length)); return; } if (length == 0) { /* Avoid doing an actual write callback with length == 0, * because that's reserved for a write flush. */ return; } DUK_ASSERT(data != NULL); p = data; for (;;) { left = (duk_size_t) ((data + length) - p); if (left == 0) { break; } DUK_ASSERT(heap->dbg_write_cb != NULL); DUK_ASSERT(left >= 1); #if defined(DUK_USE_DEBUGGER_TRANSPORT_TORTURE) left = 1; #endif DUK__DBG_TPORT_ENTER(); got = heap->dbg_write_cb(heap->dbg_udata, (const char *) p, left); DUK__DBG_TPORT_EXIT(); if (got == 0 || got > left) { duk__debug_null_most_callbacks(thr); /* avoid calling write callback in detach1() */ DUK_D(DUK_DPRINT("connection error during write")); DUK__SET_CONN_BROKEN(thr, 1); return; } p += got; } } DUK_INTERNAL void duk_debug_write_byte(duk_hthread *thr, duk_uint8_t x) { duk_debug_write_bytes(thr, (const duk_uint8_t *) &x, 1); } DUK_INTERNAL void duk_debug_write_unused(duk_hthread *thr) { duk_debug_write_byte(thr, DUK_DBG_IB_UNUSED); } DUK_INTERNAL void duk_debug_write_undefined(duk_hthread *thr) { duk_debug_write_byte(thr, DUK_DBG_IB_UNDEFINED); } #if defined(DUK_USE_DEBUGGER_INSPECT) DUK_INTERNAL void duk_debug_write_null(duk_hthread *thr) { duk_debug_write_byte(thr, DUK_DBG_IB_NULL); } #endif DUK_INTERNAL void duk_debug_write_boolean(duk_hthread *thr, duk_uint_t val) { duk_debug_write_byte(thr, val ? DUK_DBG_IB_TRUE : DUK_DBG_IB_FALSE); } /* Write signed 32-bit integer. */ DUK_INTERNAL void duk_debug_write_int(duk_hthread *thr, duk_int32_t x) { duk_uint8_t buf[5]; duk_size_t len; DUK_ASSERT(thr != NULL); if (x >= 0 && x <= 0x3fL) { buf[0] = (duk_uint8_t) (0x80 + x); len = 1; } else if (x >= 0 && x <= 0x3fffL) { buf[0] = (duk_uint8_t) (0xc0 + (x >> 8)); buf[1] = (duk_uint8_t) (x & 0xff); len = 2; } else { /* Signed integers always map to 4 bytes now. */ buf[0] = (duk_uint8_t) DUK_DBG_IB_INT4; buf[1] = (duk_uint8_t) ((x >> 24) & 0xff); buf[2] = (duk_uint8_t) ((x >> 16) & 0xff); buf[3] = (duk_uint8_t) ((x >> 8) & 0xff); buf[4] = (duk_uint8_t) (x & 0xff); len = 5; } duk_debug_write_bytes(thr, buf, len); } /* Write unsigned 32-bit integer. */ DUK_INTERNAL void duk_debug_write_uint(duk_hthread *thr, duk_uint32_t x) { /* The debugger protocol doesn't support a plain integer encoding for * the full 32-bit unsigned range (only 32-bit signed). For now, * unsigned 32-bit values simply written as signed ones. This is not * a concrete issue except for 32-bit heaphdr fields. Proper solutions * would be to (a) write such integers as IEEE doubles or (b) add an * unsigned 32-bit dvalue. */ if (x >= 0x80000000UL) { DUK_D(DUK_DPRINT("writing unsigned integer 0x%08lx as signed integer", (long) x)); } duk_debug_write_int(thr, (duk_int32_t) x); } DUK_INTERNAL void duk_debug_write_strbuf(duk_hthread *thr, const char *data, duk_size_t length, duk_uint8_t marker_base) { duk_uint8_t buf[5]; duk_size_t buflen; DUK_ASSERT(thr != NULL); DUK_ASSERT(length == 0 || data != NULL); if (length <= 0x1fUL && marker_base == DUK_DBG_IB_STR4) { /* For strings, special form for short lengths. */ buf[0] = (duk_uint8_t) (0x60 + length); buflen = 1; } else if (length <= 0xffffUL) { buf[0] = (duk_uint8_t) (marker_base + 1); buf[1] = (duk_uint8_t) (length >> 8); buf[2] = (duk_uint8_t) (length & 0xff); buflen = 3; } else { buf[0] = (duk_uint8_t) marker_base; buf[1] = (duk_uint8_t) (length >> 24); buf[2] = (duk_uint8_t) ((length >> 16) & 0xff); buf[3] = (duk_uint8_t) ((length >> 8) & 0xff); buf[4] = (duk_uint8_t) (length & 0xff); buflen = 5; } duk_debug_write_bytes(thr, (const duk_uint8_t *) buf, buflen); duk_debug_write_bytes(thr, (const duk_uint8_t *) data, length); } DUK_INTERNAL void duk_debug_write_string(duk_hthread *thr, const char *data, duk_size_t length) { duk_debug_write_strbuf(thr, data, length, DUK_DBG_IB_STR4); } DUK_INTERNAL void duk_debug_write_cstring(duk_hthread *thr, const char *data) { DUK_ASSERT(thr != NULL); duk_debug_write_string(thr, data, data ? DUK_STRLEN(data) : 0); } DUK_INTERNAL void duk_debug_write_hstring(duk_hthread *thr, duk_hstring *h) { DUK_ASSERT(thr != NULL); /* XXX: differentiate null pointer from empty string? */ duk_debug_write_string(thr, (h != NULL ? (const char *) DUK_HSTRING_GET_DATA(h) : NULL), (h != NULL ? (duk_size_t) DUK_HSTRING_GET_BYTELEN(h) : 0)); } DUK_LOCAL void duk__debug_write_hstring_safe_top(duk_hthread *thr) { duk_debug_write_hstring(thr, duk_safe_to_hstring(thr, -1)); } DUK_INTERNAL void duk_debug_write_buffer(duk_hthread *thr, const char *data, duk_size_t length) { duk_debug_write_strbuf(thr, data, length, DUK_DBG_IB_BUF4); } DUK_INTERNAL void duk_debug_write_hbuffer(duk_hthread *thr, duk_hbuffer *h) { DUK_ASSERT(thr != NULL); duk_debug_write_buffer(thr, (h != NULL ? (const char *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h) : NULL), (h != NULL ? (duk_size_t) DUK_HBUFFER_GET_SIZE(h) : 0)); } DUK_LOCAL void duk__debug_write_pointer_raw(duk_hthread *thr, void *ptr, duk_uint8_t ibyte) { duk_uint8_t buf[2]; duk__ptr_union pu; DUK_ASSERT(thr != NULL); DUK_ASSERT(sizeof(ptr) >= 1 && sizeof(ptr) <= 16); /* ptr may be NULL */ buf[0] = ibyte; buf[1] = sizeof(pu); duk_debug_write_bytes(thr, buf, 2); pu.p = (void *) ptr; #if defined(DUK_USE_INTEGER_LE) duk_byteswap_bytes((duk_uint8_t *) pu.b, sizeof(pu)); #endif duk_debug_write_bytes(thr, (const duk_uint8_t *) &pu.p, (duk_size_t) sizeof(pu)); } DUK_INTERNAL void duk_debug_write_pointer(duk_hthread *thr, void *ptr) { duk__debug_write_pointer_raw(thr, ptr, DUK_DBG_IB_POINTER); } #if defined(DUK_USE_DEBUGGER_DUMPHEAP) || defined(DUK_USE_DEBUGGER_INSPECT) DUK_INTERNAL void duk_debug_write_heapptr(duk_hthread *thr, duk_heaphdr *h) { duk__debug_write_pointer_raw(thr, (void *) h, DUK_DBG_IB_HEAPPTR); } #endif /* DUK_USE_DEBUGGER_DUMPHEAP || DUK_USE_DEBUGGER_INSPECT */ DUK_INTERNAL void duk_debug_write_hobject(duk_hthread *thr, duk_hobject *obj) { duk_uint8_t buf[3]; duk__ptr_union pu; DUK_ASSERT(thr != NULL); DUK_ASSERT(sizeof(obj) >= 1 && sizeof(obj) <= 16); DUK_ASSERT(obj != NULL); buf[0] = DUK_DBG_IB_OBJECT; buf[1] = (duk_uint8_t) DUK_HOBJECT_GET_CLASS_NUMBER(obj); buf[2] = sizeof(pu); duk_debug_write_bytes(thr, buf, 3); pu.p = (void *) obj; #if defined(DUK_USE_INTEGER_LE) duk_byteswap_bytes((duk_uint8_t *) pu.b, sizeof(pu)); #endif duk_debug_write_bytes(thr, (const duk_uint8_t *) &pu.p, (duk_size_t) sizeof(pu)); } DUK_INTERNAL void duk_debug_write_tval(duk_hthread *thr, duk_tval *tv) { duk_c_function lf_func; duk_small_uint_t lf_flags; duk_uint8_t buf[4]; duk_double_union du1; duk_double_union du2; duk_int32_t i32; DUK_ASSERT(thr != NULL); DUK_ASSERT(tv != NULL); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNDEFINED: duk_debug_write_byte(thr, DUK_DBG_IB_UNDEFINED); break; case DUK_TAG_UNUSED: duk_debug_write_byte(thr, DUK_DBG_IB_UNUSED); break; case DUK_TAG_NULL: duk_debug_write_byte(thr, DUK_DBG_IB_NULL); break; case DUK_TAG_BOOLEAN: DUK_ASSERT(DUK_TVAL_GET_BOOLEAN(tv) == 0 || DUK_TVAL_GET_BOOLEAN(tv) == 1); duk_debug_write_boolean(thr, DUK_TVAL_GET_BOOLEAN(tv)); break; case DUK_TAG_POINTER: duk_debug_write_pointer(thr, (void *) DUK_TVAL_GET_POINTER(tv)); break; case DUK_TAG_LIGHTFUNC: DUK_TVAL_GET_LIGHTFUNC(tv, lf_func, lf_flags); buf[0] = DUK_DBG_IB_LIGHTFUNC; buf[1] = (duk_uint8_t) (lf_flags >> 8); buf[2] = (duk_uint8_t) (lf_flags & 0xff); buf[3] = sizeof(lf_func); duk_debug_write_bytes(thr, buf, 4); duk_debug_write_bytes(thr, (const duk_uint8_t *) &lf_func, sizeof(lf_func)); break; case DUK_TAG_STRING: duk_debug_write_hstring(thr, DUK_TVAL_GET_STRING(tv)); break; case DUK_TAG_OBJECT: duk_debug_write_hobject(thr, DUK_TVAL_GET_OBJECT(tv)); break; case DUK_TAG_BUFFER: duk_debug_write_hbuffer(thr, DUK_TVAL_GET_BUFFER(tv)); break; #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: /* Numbers are normalized to big (network) endian. We can * (but are not required) to use integer dvalues when there's * no loss of precision. * * XXX: share check with other code; this check is slow but * reliable and doesn't require careful exponent/mantissa * mask tricks as in the fastint downgrade code. */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); du1.d = DUK_TVAL_GET_NUMBER(tv); i32 = (duk_int32_t) du1.d; du2.d = (duk_double_t) i32; DUK_DD(DUK_DDPRINT("i32=%ld du1=%02x%02x%02x%02x%02x%02x%02x%02x " "du2=%02x%02x%02x%02x%02x%02x%02x%02x", (long) i32, (unsigned int) du1.uc[0], (unsigned int) du1.uc[1], (unsigned int) du1.uc[2], (unsigned int) du1.uc[3], (unsigned int) du1.uc[4], (unsigned int) du1.uc[5], (unsigned int) du1.uc[6], (unsigned int) du1.uc[7], (unsigned int) du2.uc[0], (unsigned int) du2.uc[1], (unsigned int) du2.uc[2], (unsigned int) du2.uc[3], (unsigned int) du2.uc[4], (unsigned int) du2.uc[5], (unsigned int) du2.uc[6], (unsigned int) du2.uc[7])); if (duk_memcmp((const void *) du1.uc, (const void *) du2.uc, sizeof(du1.uc)) == 0) { duk_debug_write_int(thr, i32); } else { DUK_DBLUNION_DOUBLE_HTON(&du1); duk_debug_write_byte(thr, DUK_DBG_IB_NUMBER); duk_debug_write_bytes(thr, (const duk_uint8_t *) du1.uc, sizeof(du1.uc)); } } } #if defined(DUK_USE_DEBUGGER_DUMPHEAP) /* Variant for writing duk_tvals so that any heap allocated values are * written out as tagged heap pointers. */ DUK_LOCAL void duk__debug_write_tval_heapptr(duk_hthread *thr, duk_tval *tv) { if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) { duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv); duk_debug_write_heapptr(thr, h); } else { duk_debug_write_tval(thr, tv); } } #endif /* DUK_USE_DEBUGGER_DUMPHEAP */ /* * Debug connection message write helpers */ #if 0 /* unused */ DUK_INTERNAL void duk_debug_write_request(duk_hthread *thr, duk_small_uint_t command) { duk_debug_write_byte(thr, DUK_DBG_IB_REQUEST); duk_debug_write_int(thr, command); } #endif DUK_INTERNAL void duk_debug_write_reply(duk_hthread *thr) { duk_debug_write_byte(thr, DUK_DBG_IB_REPLY); } DUK_INTERNAL void duk_debug_write_error_eom(duk_hthread *thr, duk_small_uint_t err_code, const char *msg) { /* Allow NULL 'msg' */ duk_debug_write_byte(thr, DUK_DBG_IB_ERROR); duk_debug_write_int(thr, (duk_int32_t) err_code); duk_debug_write_cstring(thr, msg); duk_debug_write_eom(thr); } DUK_INTERNAL void duk_debug_write_notify(duk_hthread *thr, duk_small_uint_t command) { duk_debug_write_byte(thr, DUK_DBG_IB_NOTIFY); duk_debug_write_int(thr, (duk_int32_t) command); } DUK_INTERNAL void duk_debug_write_eom(duk_hthread *thr) { duk_debug_write_byte(thr, DUK_DBG_IB_EOM); /* As an initial implementation, write flush after every EOM (and the * version identifier). A better implementation would flush only when * Duktape is finished processing messages so that a flush only happens * after all outbound messages are finished on that occasion. */ duk_debug_write_flush(thr); } /* * Status message and helpers */ DUK_INTERNAL duk_uint_fast32_t duk_debug_curr_line(duk_hthread *thr) { duk_activation *act; duk_uint_fast32_t line; duk_uint_fast32_t pc; act = thr->callstack_curr; if (act == NULL) { return 0; } /* We're conceptually between two opcodes; act->pc indicates the next * instruction to be executed. This is usually the correct pc/line to * indicate in Status. (For the 'debugger' statement this now reports * the pc/line after the debugger statement because the debugger opcode * has already been executed.) */ pc = duk_hthread_get_act_curr_pc(thr, act); /* XXX: this should be optimized to be a raw query and avoid valstack * operations if possible. */ duk_push_tval(thr, &act->tv_func); line = duk_hobject_pc2line_query(thr, -1, pc); duk_pop(thr); return line; } DUK_INTERNAL void duk_debug_send_status(duk_hthread *thr) { duk_activation *act; duk_debug_write_notify(thr, DUK_DBG_CMD_STATUS); duk_debug_write_int(thr, (DUK_HEAP_HAS_DEBUGGER_PAUSED(thr->heap) ? 1 : 0)); act = thr->callstack_curr; if (act == NULL) { duk_debug_write_undefined(thr); duk_debug_write_undefined(thr); duk_debug_write_int(thr, 0); duk_debug_write_int(thr, 0); } else { duk_push_tval(thr, &act->tv_func); duk_get_prop_literal(thr, -1, "fileName"); duk__debug_write_hstring_safe_top(thr); duk_get_prop_literal(thr, -2, "name"); duk__debug_write_hstring_safe_top(thr); duk_pop_3(thr); /* Report next pc/line to be executed. */ duk_debug_write_uint(thr, (duk_uint32_t) duk_debug_curr_line(thr)); duk_debug_write_uint(thr, (duk_uint32_t) duk_hthread_get_act_curr_pc(thr, act)); } duk_debug_write_eom(thr); } #if defined(DUK_USE_DEBUGGER_THROW_NOTIFY) DUK_INTERNAL void duk_debug_send_throw(duk_hthread *thr, duk_bool_t fatal) { /* * NFY EOM */ duk_activation *act; duk_uint32_t pc; DUK_ASSERT(thr->valstack_top > thr->valstack); /* At least: ... [err] */ duk_debug_write_notify(thr, DUK_DBG_CMD_THROW); duk_debug_write_int(thr, (duk_int32_t) fatal); /* Report thrown value to client coerced to string */ duk_dup_top(thr); duk__debug_write_hstring_safe_top(thr); duk_pop(thr); if (duk_is_error(thr, -1)) { /* Error instance, use augmented error data directly */ duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_FILE_NAME); duk__debug_write_hstring_safe_top(thr); duk_get_prop_stridx_short(thr, -2, DUK_STRIDX_LINE_NUMBER); duk_debug_write_uint(thr, duk_get_uint(thr, -1)); duk_pop_2(thr); } else { /* For anything other than an Error instance, we calculate the * error location directly from the current activation if one * exists. */ act = thr->callstack_curr; if (act != NULL) { duk_push_tval(thr, &act->tv_func); duk_get_prop_literal(thr, -1, "fileName"); duk__debug_write_hstring_safe_top(thr); pc = (duk_uint32_t) duk_hthread_get_act_prev_pc(thr, act); duk_debug_write_uint(thr, (duk_uint32_t) duk_hobject_pc2line_query(thr, -2, pc)); duk_pop_2(thr); } else { /* Can happen if duk_throw() is called on an empty * callstack. */ duk_debug_write_cstring(thr, ""); duk_debug_write_uint(thr, 0); } } duk_debug_write_eom(thr); } #endif /* DUK_USE_DEBUGGER_THROW_NOTIFY */ /* * Debug message processing */ /* Skip dvalue. */ DUK_LOCAL duk_bool_t duk__debug_skip_dvalue(duk_hthread *thr) { duk_uint8_t x; duk_uint32_t len; x = duk_debug_read_byte(thr); if (x >= 0xc0) { duk_debug_skip_byte(thr); return 0; } if (x >= 0x80) { return 0; } if (x >= 0x60) { duk_debug_skip_bytes(thr, (duk_size_t) (x - 0x60)); return 0; } switch(x) { case DUK_DBG_IB_EOM: return 1; /* Return 1: got EOM */ case DUK_DBG_IB_REQUEST: case DUK_DBG_IB_REPLY: case DUK_DBG_IB_ERROR: case DUK_DBG_IB_NOTIFY: break; case DUK_DBG_IB_INT4: (void) duk__debug_read_uint32_raw(thr); break; case DUK_DBG_IB_STR4: case DUK_DBG_IB_BUF4: len = duk__debug_read_uint32_raw(thr); duk_debug_skip_bytes(thr, len); break; case DUK_DBG_IB_STR2: case DUK_DBG_IB_BUF2: len = duk__debug_read_uint16_raw(thr); duk_debug_skip_bytes(thr, len); break; case DUK_DBG_IB_UNUSED: case DUK_DBG_IB_UNDEFINED: case DUK_DBG_IB_NULL: case DUK_DBG_IB_TRUE: case DUK_DBG_IB_FALSE: break; case DUK_DBG_IB_NUMBER: duk_debug_skip_bytes(thr, 8); break; case DUK_DBG_IB_OBJECT: duk_debug_skip_byte(thr); len = duk_debug_read_byte(thr); duk_debug_skip_bytes(thr, len); break; case DUK_DBG_IB_POINTER: case DUK_DBG_IB_HEAPPTR: len = duk_debug_read_byte(thr); duk_debug_skip_bytes(thr, len); break; case DUK_DBG_IB_LIGHTFUNC: duk_debug_skip_bytes(thr, 2); len = duk_debug_read_byte(thr); duk_debug_skip_bytes(thr, len); break; default: goto fail; } return 0; fail: DUK__SET_CONN_BROKEN(thr, 1); return 1; /* Pretend like we got EOM */ } /* Skip dvalues to EOM. */ DUK_LOCAL void duk__debug_skip_to_eom(duk_hthread *thr) { for (;;) { if (duk__debug_skip_dvalue(thr)) { break; } } } /* Read and validate a call stack index. If index is invalid, write out an * error message and return zero. */ DUK_LOCAL duk_int32_t duk__debug_read_validate_csindex(duk_hthread *thr) { duk_int32_t level; level = duk_debug_read_int(thr); if (level >= 0 || -level > (duk_int32_t) thr->callstack_top) { duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid callstack index"); return 0; /* zero indicates failure */ } return level; } /* Read a call stack index and lookup the corresponding duk_activation. * If index is invalid, write out an error message and return NULL. */ DUK_LOCAL duk_activation *duk__debug_read_level_get_activation(duk_hthread *thr) { duk_activation *act; duk_int32_t level; level = duk_debug_read_int(thr); act = duk_hthread_get_activation_for_level(thr, level); if (act == NULL) { duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid callstack index"); } return act; } /* * Simple commands */ DUK_LOCAL void duk__debug_handle_basic_info(duk_hthread *thr, duk_heap *heap) { DUK_UNREF(heap); DUK_D(DUK_DPRINT("debug command Version")); duk_debug_write_reply(thr); duk_debug_write_int(thr, DUK_VERSION); duk_debug_write_cstring(thr, DUK_GIT_DESCRIBE); duk_debug_write_cstring(thr, DUK_USE_TARGET_INFO); #if defined(DUK_USE_DOUBLE_LE) duk_debug_write_int(thr, 1); #elif defined(DUK_USE_DOUBLE_ME) duk_debug_write_int(thr, 2); #elif defined(DUK_USE_DOUBLE_BE) duk_debug_write_int(thr, 3); #else duk_debug_write_int(thr, 0); #endif duk_debug_write_int(thr, (duk_int_t) sizeof(void *)); duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_trigger_status(duk_hthread *thr, duk_heap *heap) { DUK_UNREF(heap); DUK_D(DUK_DPRINT("debug command TriggerStatus")); duk_debug_write_reply(thr); duk_debug_write_eom(thr); heap->dbg_state_dirty = 1; } DUK_LOCAL void duk__debug_handle_pause(duk_hthread *thr, duk_heap *heap) { DUK_D(DUK_DPRINT("debug command Pause")); duk_debug_set_paused(heap); duk_debug_write_reply(thr); duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_resume(duk_hthread *thr, duk_heap *heap) { duk_small_uint_t pause_flags; DUK_D(DUK_DPRINT("debug command Resume")); duk_debug_clear_paused(heap); pause_flags = 0; #if 0 /* manual testing */ pause_flags |= DUK_PAUSE_FLAG_ONE_OPCODE; pause_flags |= DUK_PAUSE_FLAG_CAUGHT_ERROR; pause_flags |= DUK_PAUSE_FLAG_UNCAUGHT_ERROR; #endif #if defined(DUK_USE_DEBUGGER_PAUSE_UNCAUGHT) pause_flags |= DUK_PAUSE_FLAG_UNCAUGHT_ERROR; #endif duk__debug_set_pause_state(thr, heap, pause_flags); duk_debug_write_reply(thr); duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_step(duk_hthread *thr, duk_heap *heap, duk_int32_t cmd) { duk_small_uint_t pause_flags; DUK_D(DUK_DPRINT("debug command StepInto/StepOver/StepOut: %d", (int) cmd)); if (cmd == DUK_DBG_CMD_STEPINTO) { pause_flags = DUK_PAUSE_FLAG_LINE_CHANGE | DUK_PAUSE_FLAG_FUNC_ENTRY | DUK_PAUSE_FLAG_FUNC_EXIT; } else if (cmd == DUK_DBG_CMD_STEPOVER) { pause_flags = DUK_PAUSE_FLAG_LINE_CHANGE | DUK_PAUSE_FLAG_FUNC_EXIT; } else { DUK_ASSERT(cmd == DUK_DBG_CMD_STEPOUT); pause_flags = DUK_PAUSE_FLAG_FUNC_EXIT; } #if defined(DUK_USE_DEBUGGER_PAUSE_UNCAUGHT) pause_flags |= DUK_PAUSE_FLAG_UNCAUGHT_ERROR; #endif /* If current activation doesn't have line information, line-based * pause flags are automatically disabled. As a result, e.g. * StepInto will then pause on (native) function entry or exit. */ duk_debug_clear_paused(heap); duk__debug_set_pause_state(thr, heap, pause_flags); duk_debug_write_reply(thr); duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_list_break(duk_hthread *thr, duk_heap *heap) { duk_small_int_t i; DUK_D(DUK_DPRINT("debug command ListBreak")); duk_debug_write_reply(thr); for (i = 0; i < (duk_small_int_t) heap->dbg_breakpoint_count; i++) { duk_debug_write_hstring(thr, heap->dbg_breakpoints[i].filename); duk_debug_write_uint(thr, (duk_uint32_t) heap->dbg_breakpoints[i].line); } duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_add_break(duk_hthread *thr, duk_heap *heap) { duk_hstring *filename; duk_uint32_t linenumber; duk_small_int_t idx; DUK_UNREF(heap); filename = duk_debug_read_hstring(thr); linenumber = (duk_uint32_t) duk_debug_read_int(thr); DUK_D(DUK_DPRINT("debug command AddBreak: %!O:%ld", (duk_hobject *) filename, (long) linenumber)); idx = duk_debug_add_breakpoint(thr, filename, linenumber); if (idx >= 0) { duk_debug_write_reply(thr); duk_debug_write_int(thr, (duk_int32_t) idx); duk_debug_write_eom(thr); } else { duk_debug_write_error_eom(thr, DUK_DBG_ERR_TOOMANY, "no space for breakpoint"); } } DUK_LOCAL void duk__debug_handle_del_break(duk_hthread *thr, duk_heap *heap) { duk_small_uint_t idx; DUK_UNREF(heap); DUK_D(DUK_DPRINT("debug command DelBreak")); idx = (duk_small_uint_t) duk_debug_read_int(thr); if (duk_debug_remove_breakpoint(thr, idx)) { duk_debug_write_reply(thr); duk_debug_write_eom(thr); } else { duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid breakpoint index"); } } DUK_LOCAL void duk__debug_handle_get_var(duk_hthread *thr, duk_heap *heap) { duk_activation *act; duk_hstring *str; duk_bool_t rc; DUK_UNREF(heap); DUK_D(DUK_DPRINT("debug command GetVar")); act = duk__debug_read_level_get_activation(thr); if (act == NULL) { return; } str = duk_debug_read_hstring(thr); /* push to stack */ DUK_ASSERT(str != NULL); rc = duk_js_getvar_activation(thr, act, str, 0); duk_debug_write_reply(thr); if (rc) { duk_debug_write_int(thr, 1); DUK_ASSERT(duk_get_tval(thr, -2) != NULL); duk_debug_write_tval(thr, duk_get_tval(thr, -2)); } else { duk_debug_write_int(thr, 0); duk_debug_write_unused(thr); } duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_put_var(duk_hthread *thr, duk_heap *heap) { duk_activation *act; duk_hstring *str; duk_tval *tv; DUK_UNREF(heap); DUK_D(DUK_DPRINT("debug command PutVar")); act = duk__debug_read_level_get_activation(thr); if (act == NULL) { return; } str = duk_debug_read_hstring(thr); /* push to stack */ DUK_ASSERT(str != NULL); tv = duk_debug_read_tval(thr); if (tv == NULL) { /* detached */ return; } duk_js_putvar_activation(thr, act, str, tv, 0); /* XXX: Current putvar implementation doesn't have a success flag, * add one and send to debug client? */ duk_debug_write_reply(thr); duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_get_call_stack(duk_hthread *thr, duk_heap *heap) { duk_hthread *curr_thr = thr; duk_activation *curr_act; duk_uint_fast32_t pc; duk_uint_fast32_t line; DUK_ASSERT(thr != NULL); DUK_UNREF(heap); duk_debug_write_reply(thr); while (curr_thr != NULL) { for (curr_act = curr_thr->callstack_curr; curr_act != NULL; curr_act = curr_act->parent) { /* PC/line semantics here are: * - For callstack top we're conceptually between two * opcodes and current PC indicates next line to * execute, so report that (matches Status). * - For other activations we're conceptually still * executing the instruction at PC-1, so report that * (matches error stacktrace behavior). * - See: https://github.com/svaarala/duktape/issues/281 */ /* XXX: optimize to use direct reads, i.e. avoid * value stack operations. */ duk_push_tval(thr, &curr_act->tv_func); duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_FILE_NAME); duk__debug_write_hstring_safe_top(thr); duk_get_prop_stridx_short(thr, -2, DUK_STRIDX_NAME); duk__debug_write_hstring_safe_top(thr); pc = duk_hthread_get_act_curr_pc(thr, curr_act); if (curr_act != curr_thr->callstack_curr && pc > 0) { pc--; } line = duk_hobject_pc2line_query(thr, -3, pc); duk_debug_write_uint(thr, (duk_uint32_t) line); duk_debug_write_uint(thr, (duk_uint32_t) pc); duk_pop_3(thr); } curr_thr = curr_thr->resumer; } /* SCANBUILD: warning about 'thr' potentially being NULL here, * warning is incorrect because thr != NULL always here. */ duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_get_locals(duk_hthread *thr, duk_heap *heap) { duk_activation *act; duk_hstring *varname; DUK_UNREF(heap); act = duk__debug_read_level_get_activation(thr); if (act == NULL) { return; } duk_debug_write_reply(thr); /* XXX: several nice-to-have improvements here: * - Use direct reads avoiding value stack operations * - Avoid triggering getters, indicate getter values to debug client * - If side effects are possible, add error catching */ if (DUK_TVAL_IS_OBJECT(&act->tv_func)) { duk_hobject *h_func = DUK_TVAL_GET_OBJECT(&act->tv_func); duk_hobject *h_varmap; h_varmap = duk_hobject_get_varmap(thr, h_func); if (h_varmap != NULL) { duk_push_hobject(thr, h_varmap); duk_enum(thr, -1, 0 /*enum_flags*/); while (duk_next(thr, -1 /*enum_index*/, 0 /*get_value*/)) { varname = duk_known_hstring(thr, -1); duk_js_getvar_activation(thr, act, varname, 0 /*throw_flag*/); /* [ ... func varmap enum key value this ] */ duk_debug_write_hstring(thr, duk_get_hstring(thr, -3)); duk_debug_write_tval(thr, duk_get_tval(thr, -2)); duk_pop_3(thr); /* -> [ ... func varmap enum ] */ } } else { DUK_D(DUK_DPRINT("varmap missing in GetLocals, ignore")); } } else { DUK_D(DUK_DPRINT("varmap is not an object in GetLocals, ignore")); } duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_eval(duk_hthread *thr, duk_heap *heap) { duk_small_uint_t call_flags; duk_int_t call_ret; duk_small_int_t eval_err; duk_bool_t direct_eval; duk_int32_t level; duk_idx_t idx_func; DUK_UNREF(heap); DUK_D(DUK_DPRINT("debug command Eval")); /* The eval code is executed within the lexical environment of a specified * activation. For now, use global object eval() function, with the eval * considered a 'direct call to eval'. * * Callstack index for debug commands only affects scope -- the callstack * as seen by, e.g. Duktape.act() will be the same regardless. */ /* nargs == 2 so we can pass a callstack index to eval(). */ idx_func = duk_get_top(thr); duk_push_c_function(thr, duk_bi_global_object_eval, 2 /*nargs*/); duk_push_undefined(thr); /* 'this' binding shouldn't matter here */ /* Read callstack index, if non-null. */ if (duk_debug_peek_byte(thr) == DUK_DBG_IB_NULL) { direct_eval = 0; level = -1; /* Not needed, but silences warning. */ (void) duk_debug_read_byte(thr); } else { direct_eval = 1; level = duk__debug_read_validate_csindex(thr); if (level == 0) { return; } } DUK_ASSERT(!direct_eval || (level < 0 && -level <= (duk_int32_t) thr->callstack_top)); (void) duk_debug_read_hstring(thr); if (direct_eval) { duk_push_int(thr, level - 1); /* compensate for eval() call */ } /* [ ... eval "eval" eval_input level? ] */ call_flags = 0; if (direct_eval) { duk_activation *act; duk_hobject *fun; act = duk_hthread_get_activation_for_level(thr, level); if (act != NULL) { fun = DUK_ACT_GET_FUNC(act); if (fun != NULL && DUK_HOBJECT_IS_COMPFUNC(fun)) { /* Direct eval requires that there's a current * activation and it is an ECMAScript function. * When Eval is executed from e.g. cooperate API * call we'll need to do an indirect eval instead. */ call_flags |= DUK_CALL_FLAG_DIRECT_EVAL; } } } call_ret = duk_pcall_method_flags(thr, duk_get_top(thr) - (idx_func + 2), call_flags); if (call_ret == DUK_EXEC_SUCCESS) { eval_err = 0; /* Use result value as is. */ } else { /* For errors a string coerced result is most informative * right now, as the debug client doesn't have the capability * to traverse the error object. */ eval_err = 1; duk_safe_to_string(thr, -1); } /* [ ... result ] */ duk_debug_write_reply(thr); duk_debug_write_int(thr, (duk_int32_t) eval_err); DUK_ASSERT(duk_get_tval(thr, -1) != NULL); duk_debug_write_tval(thr, duk_get_tval(thr, -1)); duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_detach(duk_hthread *thr, duk_heap *heap) { DUK_UNREF(heap); DUK_D(DUK_DPRINT("debug command Detach")); duk_debug_write_reply(thr); duk_debug_write_eom(thr); DUK_D(DUK_DPRINT("debug connection detached, mark broken")); DUK__SET_CONN_BROKEN(thr, 0); /* not an error */ } DUK_LOCAL void duk__debug_handle_apprequest(duk_hthread *thr, duk_heap *heap) { duk_idx_t old_top; DUK_D(DUK_DPRINT("debug command AppRequest")); old_top = duk_get_top(thr); /* save stack top */ if (heap->dbg_request_cb != NULL) { duk_idx_t nrets; duk_idx_t nvalues = 0; duk_idx_t top, idx; /* Read tvals from the message and push them onto the valstack, * then call the request callback to process the request. */ while (duk_debug_peek_byte(thr) != DUK_DBG_IB_EOM) { duk_tval *tv; if (!duk_check_stack(thr, 1)) { DUK_D(DUK_DPRINT("failed to allocate space for request dvalue(s)")); goto fail; } tv = duk_debug_read_tval(thr); /* push to stack */ if (tv == NULL) { /* detached */ return; } nvalues++; } DUK_ASSERT(duk_get_top(thr) == old_top + nvalues); /* Request callback should push values for reply to client onto valstack */ DUK_D(DUK_DPRINT("calling into AppRequest request_cb with nvalues=%ld, old_top=%ld, top=%ld", (long) nvalues, (long) old_top, (long) duk_get_top(thr))); nrets = heap->dbg_request_cb(thr, heap->dbg_udata, nvalues); DUK_D(DUK_DPRINT("returned from AppRequest request_cb; nvalues=%ld -> nrets=%ld, old_top=%ld, top=%ld", (long) nvalues, (long) nrets, (long) old_top, (long) duk_get_top(thr))); if (nrets >= 0) { DUK_ASSERT(duk_get_top(thr) >= old_top + nrets); if (duk_get_top(thr) < old_top + nrets) { DUK_D(DUK_DPRINT("AppRequest callback doesn't match value stack configuration, " "top=%ld < old_top=%ld + nrets=%ld; " "this might mean it's unsafe to continue!", (long) duk_get_top(thr), (long) old_top, (long) nrets)); goto fail; } /* Reply with tvals pushed by request callback */ duk_debug_write_byte(thr, DUK_DBG_IB_REPLY); top = duk_get_top(thr); for (idx = top - nrets; idx < top; idx++) { duk_debug_write_tval(thr, DUK_GET_TVAL_POSIDX(thr, idx)); } duk_debug_write_eom(thr); } else { DUK_ASSERT(duk_get_top(thr) >= old_top + 1); if (duk_get_top(thr) < old_top + 1) { DUK_D(DUK_DPRINT("request callback return value doesn't match value stack configuration")); goto fail; } duk_debug_write_error_eom(thr, DUK_DBG_ERR_APPLICATION, duk_get_string(thr, -1)); } duk_set_top(thr, old_top); /* restore stack top */ } else { DUK_D(DUK_DPRINT("no request callback, treat AppRequest as unsupported")); duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNSUPPORTED, "AppRequest unsupported by target"); } return; fail: duk_set_top(thr, old_top); /* restore stack top */ DUK__SET_CONN_BROKEN(thr, 1); } /* * DumpHeap command */ #if defined(DUK_USE_DEBUGGER_DUMPHEAP) /* XXX: this has some overlap with object inspection; remove this and make * DumpHeap return lists of heapptrs instead? */ DUK_LOCAL void duk__debug_dump_heaphdr(duk_hthread *thr, duk_heap *heap, duk_heaphdr *hdr) { DUK_UNREF(heap); duk_debug_write_heapptr(thr, hdr); duk_debug_write_uint(thr, (duk_uint32_t) DUK_HEAPHDR_GET_TYPE(hdr)); duk_debug_write_uint(thr, (duk_uint32_t) DUK_HEAPHDR_GET_FLAGS_RAW(hdr)); #if defined(DUK_USE_REFERENCE_COUNTING) duk_debug_write_uint(thr, (duk_uint32_t) DUK_HEAPHDR_GET_REFCOUNT(hdr)); #else duk_debug_write_int(thr, (duk_int32_t) -1); #endif switch (DUK_HEAPHDR_GET_TYPE(hdr)) { case DUK_HTYPE_STRING: { duk_hstring *h = (duk_hstring *) hdr; duk_debug_write_uint(thr, (duk_uint32_t) DUK_HSTRING_GET_BYTELEN(h)); duk_debug_write_uint(thr, (duk_uint32_t) DUK_HSTRING_GET_CHARLEN(h)); duk_debug_write_uint(thr, (duk_uint32_t) DUK_HSTRING_GET_HASH(h)); duk_debug_write_hstring(thr, h); break; } case DUK_HTYPE_OBJECT: { duk_hobject *h = (duk_hobject *) hdr; duk_hstring *k; duk_uint_fast32_t i; duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_CLASS_NUMBER(h)); duk_debug_write_heapptr(thr, (duk_heaphdr *) DUK_HOBJECT_GET_PROTOTYPE(heap, h)); duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_ESIZE(h)); duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_ENEXT(h)); duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_ASIZE(h)); duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_HSIZE(h)); for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h); i++) { duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_E_GET_FLAGS(heap, h, i)); k = DUK_HOBJECT_E_GET_KEY(heap, h, i); duk_debug_write_heapptr(thr, (duk_heaphdr *) k); if (k == NULL) { duk_debug_write_int(thr, 0); /* isAccessor */ duk_debug_write_unused(thr); continue; } if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap, h, i)) { duk_debug_write_int(thr, 1); /* isAccessor */ duk_debug_write_heapptr(thr, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->a.get); duk_debug_write_heapptr(thr, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->a.set); } else { duk_debug_write_int(thr, 0); /* isAccessor */ duk__debug_write_tval_heapptr(thr, &DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->v); } } for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(h); i++) { /* Note: array dump will include elements beyond * 'length'. */ duk__debug_write_tval_heapptr(thr, DUK_HOBJECT_A_GET_VALUE_PTR(heap, h, i)); } break; } case DUK_HTYPE_BUFFER: { duk_hbuffer *h = (duk_hbuffer *) hdr; duk_debug_write_uint(thr, (duk_uint32_t) DUK_HBUFFER_GET_SIZE(h)); duk_debug_write_buffer(thr, (const char *) DUK_HBUFFER_GET_DATA_PTR(heap, h), (duk_size_t) DUK_HBUFFER_GET_SIZE(h)); break; } default: { DUK_D(DUK_DPRINT("invalid htype: %d", (int) DUK_HEAPHDR_GET_TYPE(hdr))); } } } DUK_LOCAL void duk__debug_dump_heap_allocated(duk_hthread *thr, duk_heap *heap) { duk_heaphdr *hdr; hdr = heap->heap_allocated; while (hdr != NULL) { duk__debug_dump_heaphdr(thr, heap, hdr); hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr); } } DUK_LOCAL void duk__debug_dump_strtab(duk_hthread *thr, duk_heap *heap) { duk_uint32_t i; duk_hstring *h; for (i = 0; i < heap->st_size; i++) { #if defined(DUK_USE_STRTAB_PTRCOMP) h = DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, heap->strtable16[i]); #else h = heap->strtable[i]; #endif while (h != NULL) { duk__debug_dump_heaphdr(thr, heap, (duk_heaphdr *) h); h = h->hdr.h_next; } } } DUK_LOCAL void duk__debug_handle_dump_heap(duk_hthread *thr, duk_heap *heap) { DUK_D(DUK_DPRINT("debug command DumpHeap")); duk_debug_write_reply(thr); duk__debug_dump_heap_allocated(thr, heap); duk__debug_dump_strtab(thr, heap); duk_debug_write_eom(thr); } #endif /* DUK_USE_DEBUGGER_DUMPHEAP */ DUK_LOCAL void duk__debug_handle_get_bytecode(duk_hthread *thr, duk_heap *heap) { duk_activation *act; duk_hcompfunc *fun = NULL; duk_size_t i, n; duk_tval *tv; duk_hobject **fn; duk_int32_t level = -1; duk_uint8_t ibyte; DUK_UNREF(heap); DUK_D(DUK_DPRINT("debug command GetBytecode")); ibyte = duk_debug_peek_byte(thr); if (ibyte != DUK_DBG_IB_EOM) { tv = duk_debug_read_tval(thr); if (tv == NULL) { /* detached */ return; } if (DUK_TVAL_IS_OBJECT(tv)) { /* tentative, checked later */ fun = (duk_hcompfunc *) DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(fun != NULL); } else if (DUK_TVAL_IS_NUMBER(tv)) { level = (duk_int32_t) DUK_TVAL_GET_NUMBER(tv); } else { DUK_D(DUK_DPRINT("invalid argument to GetBytecode: %!T", tv)); goto fail_args; } } if (fun == NULL) { act = duk_hthread_get_activation_for_level(thr, level); if (act == NULL) { goto fail_index; } fun = (duk_hcompfunc *) DUK_ACT_GET_FUNC(act); } if (fun == NULL || !DUK_HOBJECT_IS_COMPFUNC((duk_hobject *) fun)) { DUK_D(DUK_DPRINT("invalid argument to GetBytecode: %!O", fun)); goto fail_args; } DUK_ASSERT(fun != NULL && DUK_HOBJECT_IS_COMPFUNC((duk_hobject *) fun)); duk_debug_write_reply(thr); n = DUK_HCOMPFUNC_GET_CONSTS_COUNT(heap, fun); duk_debug_write_int(thr, (duk_int32_t) n); tv = DUK_HCOMPFUNC_GET_CONSTS_BASE(heap, fun); for (i = 0; i < n; i++) { duk_debug_write_tval(thr, tv); tv++; } n = DUK_HCOMPFUNC_GET_FUNCS_COUNT(heap, fun); duk_debug_write_int(thr, (duk_int32_t) n); fn = DUK_HCOMPFUNC_GET_FUNCS_BASE(heap, fun); for (i = 0; i < n; i++) { duk_debug_write_hobject(thr, *fn); fn++; } duk_debug_write_string(thr, (const char *) DUK_HCOMPFUNC_GET_CODE_BASE(heap, fun), (duk_size_t) DUK_HCOMPFUNC_GET_CODE_SIZE(heap, fun)); duk_debug_write_eom(thr); return; fail_args: duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid argument"); return; fail_index: duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid callstack index"); return; } /* * Object inspection commands: GetHeapObjInfo, GetObjPropDesc, * GetObjPropDescRange */ #if defined(DUK_USE_DEBUGGER_INSPECT) #if 0 /* pruned */ DUK_LOCAL const char * const duk__debug_getinfo_heaphdr_keys[] = { "reachable", "temproot", "finalizable", "finalized", "readonly" /* NULL not needed here */ }; DUK_LOCAL duk_uint_t duk__debug_getinfo_heaphdr_masks[] = { DUK_HEAPHDR_FLAG_REACHABLE, DUK_HEAPHDR_FLAG_TEMPROOT, DUK_HEAPHDR_FLAG_FINALIZABLE, DUK_HEAPHDR_FLAG_FINALIZED, DUK_HEAPHDR_FLAG_READONLY, 0 /* terminator */ }; #endif DUK_LOCAL const char * const duk__debug_getinfo_hstring_keys[] = { #if 0 "arridx", "symbol", "hidden", "reserved_word", "strict_reserved_word", "eval_or_arguments", #endif "extdata" /* NULL not needed here */ }; DUK_LOCAL duk_uint_t duk__debug_getinfo_hstring_masks[] = { #if 0 DUK_HSTRING_FLAG_ARRIDX, DUK_HSTRING_FLAG_SYMBOL, DUK_HSTRING_FLAG_HIDDEN, DUK_HSTRING_FLAG_RESERVED_WORD, DUK_HSTRING_FLAG_STRICT_RESERVED_WORD, DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS, #endif DUK_HSTRING_FLAG_EXTDATA, 0 /* terminator */ }; DUK_LOCAL const char * const duk__debug_getinfo_hobject_keys[] = { "extensible", "constructable", "callable", "boundfunc", "compfunc", "natfunc", "bufobj", "fastrefs", "array_part", "strict", "notail", "newenv", "namebinding", "createargs", "have_finalizer", "exotic_array", "exotic_stringobj", "exotic_arguments", "exotic_proxyobj", "special_call" /* NULL not needed here */ }; DUK_LOCAL duk_uint_t duk__debug_getinfo_hobject_masks[] = { DUK_HOBJECT_FLAG_EXTENSIBLE, DUK_HOBJECT_FLAG_CONSTRUCTABLE, DUK_HOBJECT_FLAG_CALLABLE, DUK_HOBJECT_FLAG_BOUNDFUNC, DUK_HOBJECT_FLAG_COMPFUNC, DUK_HOBJECT_FLAG_NATFUNC, DUK_HOBJECT_FLAG_BUFOBJ, DUK_HOBJECT_FLAG_FASTREFS, DUK_HOBJECT_FLAG_ARRAY_PART, DUK_HOBJECT_FLAG_STRICT, DUK_HOBJECT_FLAG_NOTAIL, DUK_HOBJECT_FLAG_NEWENV, DUK_HOBJECT_FLAG_NAMEBINDING, DUK_HOBJECT_FLAG_CREATEARGS, DUK_HOBJECT_FLAG_HAVE_FINALIZER, DUK_HOBJECT_FLAG_EXOTIC_ARRAY, DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ, DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS, DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ, DUK_HOBJECT_FLAG_SPECIAL_CALL, 0 /* terminator */ }; DUK_LOCAL const char * const duk__debug_getinfo_hbuffer_keys[] = { "dynamic", "external" /* NULL not needed here */ }; DUK_LOCAL duk_uint_t duk__debug_getinfo_hbuffer_masks[] = { DUK_HBUFFER_FLAG_DYNAMIC, DUK_HBUFFER_FLAG_EXTERNAL, 0 /* terminator */ }; DUK_LOCAL void duk__debug_getinfo_flags_key(duk_hthread *thr, const char *key) { duk_debug_write_uint(thr, 0); duk_debug_write_cstring(thr, key); } DUK_LOCAL void duk__debug_getinfo_prop_uint(duk_hthread *thr, const char *key, duk_uint_t val) { duk_debug_write_uint(thr, 0); duk_debug_write_cstring(thr, key); duk_debug_write_uint(thr, val); } DUK_LOCAL void duk__debug_getinfo_prop_int(duk_hthread *thr, const char *key, duk_int_t val) { duk_debug_write_uint(thr, 0); duk_debug_write_cstring(thr, key); duk_debug_write_int(thr, val); } DUK_LOCAL void duk__debug_getinfo_prop_bool(duk_hthread *thr, const char *key, duk_bool_t val) { duk_debug_write_uint(thr, 0); duk_debug_write_cstring(thr, key); duk_debug_write_boolean(thr, val); } DUK_LOCAL void duk__debug_getinfo_bitmask(duk_hthread *thr, const char * const * keys, duk_uint_t *masks, duk_uint_t flags) { const char *key; duk_uint_t mask; for (;;) { mask = *masks++; if (mask == 0) { break; } key = *keys++; DUK_ASSERT(key != NULL); DUK_DD(DUK_DDPRINT("inspect bitmask: key=%s, mask=0x%08lx, flags=0x%08lx", key, (unsigned long) mask, (unsigned long) flags)); duk__debug_getinfo_prop_bool(thr, key, flags & mask); } } /* Inspect a property using a virtual index into a conceptual property list * consisting of (1) all array part items from [0,a_size[ (even when above * .length) and (2) all entry part items from [0,e_next[. Unused slots are * indicated using dvalue 'unused'. */ DUK_LOCAL duk_bool_t duk__debug_getprop_index(duk_hthread *thr, duk_heap *heap, duk_hobject *h_obj, duk_uint_t idx) { duk_uint_t a_size; duk_tval *tv; duk_hstring *h_key; duk_hobject *h_getset; duk_uint_t flags; DUK_UNREF(heap); a_size = DUK_HOBJECT_GET_ASIZE(h_obj); if (idx < a_size) { duk_debug_write_uint(thr, DUK_PROPDESC_FLAGS_WEC); duk_debug_write_uint(thr, idx); tv = DUK_HOBJECT_A_GET_VALUE_PTR(heap, h_obj, idx); duk_debug_write_tval(thr, tv); return 1; } idx -= a_size; if (idx >= DUK_HOBJECT_GET_ENEXT(h_obj)) { return 0; } h_key = DUK_HOBJECT_E_GET_KEY(heap, h_obj, idx); if (h_key == NULL) { duk_debug_write_uint(thr, 0); duk_debug_write_null(thr); duk_debug_write_unused(thr); return 1; } flags = DUK_HOBJECT_E_GET_FLAGS(heap, h_obj, idx); if (DUK_HSTRING_HAS_SYMBOL(h_key)) { flags |= DUK_DBG_PROPFLAG_SYMBOL; } if (DUK_HSTRING_HAS_HIDDEN(h_key)) { flags |= DUK_DBG_PROPFLAG_HIDDEN; } duk_debug_write_uint(thr, flags); duk_debug_write_hstring(thr, h_key); if (flags & DUK_PROPDESC_FLAG_ACCESSOR) { h_getset = DUK_HOBJECT_E_GET_VALUE_GETTER(heap, h_obj, idx); if (h_getset) { duk_debug_write_hobject(thr, h_getset); } else { duk_debug_write_null(thr); } h_getset = DUK_HOBJECT_E_GET_VALUE_SETTER(heap, h_obj, idx); if (h_getset) { duk_debug_write_hobject(thr, h_getset); } else { duk_debug_write_null(thr); } } else { tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(heap, h_obj, idx); duk_debug_write_tval(thr, tv); } return 1; } DUK_LOCAL void duk__debug_handle_get_heap_obj_info(duk_hthread *thr, duk_heap *heap) { duk_heaphdr *h; DUK_D(DUK_DPRINT("debug command GetHeapObjInfo")); DUK_UNREF(heap); DUK_ASSERT(sizeof(duk__debug_getinfo_hstring_keys) / sizeof(const char *) == sizeof(duk__debug_getinfo_hstring_masks) / sizeof(duk_uint_t) - 1); DUK_ASSERT(sizeof(duk__debug_getinfo_hobject_keys) / sizeof(const char *) == sizeof(duk__debug_getinfo_hobject_masks) / sizeof(duk_uint_t) - 1); DUK_ASSERT(sizeof(duk__debug_getinfo_hbuffer_keys) / sizeof(const char *) == sizeof(duk__debug_getinfo_hbuffer_masks) / sizeof(duk_uint_t) - 1); h = duk_debug_read_any_ptr(thr); if (!h) { duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid target"); return; } duk_debug_write_reply(thr); /* As with all inspection code, we rely on the debug client providing * a valid, non-stale pointer: there's no portable way to safely * validate the pointer here. */ duk__debug_getinfo_flags_key(thr, "heapptr"); duk_debug_write_heapptr(thr, h); /* XXX: comes out as signed now */ duk__debug_getinfo_prop_uint(thr, "heaphdr_flags", (duk_uint_t) DUK_HEAPHDR_GET_FLAGS(h)); duk__debug_getinfo_prop_uint(thr, "heaphdr_type", (duk_uint_t) DUK_HEAPHDR_GET_TYPE(h)); #if defined(DUK_USE_REFERENCE_COUNTING) duk__debug_getinfo_prop_uint(thr, "refcount", (duk_uint_t) DUK_HEAPHDR_GET_REFCOUNT(h)); #endif #if 0 /* pruned */ duk__debug_getinfo_bitmask(thr, duk__debug_getinfo_heaphdr_keys, duk__debug_getinfo_heaphdr_masks, DUK_HEAPHDR_GET_FLAGS_RAW(h)); #endif switch (DUK_HEAPHDR_GET_TYPE(h)) { case DUK_HTYPE_STRING: { duk_hstring *h_str; h_str = (duk_hstring *) h; duk__debug_getinfo_bitmask(thr, duk__debug_getinfo_hstring_keys, duk__debug_getinfo_hstring_masks, DUK_HEAPHDR_GET_FLAGS_RAW(h)); duk__debug_getinfo_prop_uint(thr, "bytelen", (duk_uint_t) DUK_HSTRING_GET_BYTELEN(h_str)); duk__debug_getinfo_prop_uint(thr, "charlen", (duk_uint_t) DUK_HSTRING_GET_CHARLEN(h_str)); duk__debug_getinfo_prop_uint(thr, "hash", (duk_uint_t) DUK_HSTRING_GET_HASH(h_str)); duk__debug_getinfo_flags_key(thr, "data"); duk_debug_write_hstring(thr, h_str); break; } case DUK_HTYPE_OBJECT: { duk_hobject *h_obj; duk_hobject *h_proto; h_obj = (duk_hobject *) h; h_proto = DUK_HOBJECT_GET_PROTOTYPE(heap, h_obj); /* duk_hobject specific fields. */ duk__debug_getinfo_bitmask(thr, duk__debug_getinfo_hobject_keys, duk__debug_getinfo_hobject_masks, DUK_HEAPHDR_GET_FLAGS_RAW(h)); duk__debug_getinfo_prop_uint(thr, "class_number", DUK_HOBJECT_GET_CLASS_NUMBER(h_obj)); duk__debug_getinfo_flags_key(thr, "class_name"); duk_debug_write_hstring(thr, DUK_HOBJECT_GET_CLASS_STRING(heap, h_obj)); duk__debug_getinfo_flags_key(thr, "prototype"); if (h_proto != NULL) { duk_debug_write_hobject(thr, h_proto); } else { duk_debug_write_null(thr); } duk__debug_getinfo_flags_key(thr, "props"); duk_debug_write_pointer(thr, (void *) DUK_HOBJECT_GET_PROPS(heap, h_obj)); duk__debug_getinfo_prop_uint(thr, "e_size", (duk_uint_t) DUK_HOBJECT_GET_ESIZE(h_obj)); duk__debug_getinfo_prop_uint(thr, "e_next", (duk_uint_t) DUK_HOBJECT_GET_ENEXT(h_obj)); duk__debug_getinfo_prop_uint(thr, "a_size", (duk_uint_t) DUK_HOBJECT_GET_ASIZE(h_obj)); duk__debug_getinfo_prop_uint(thr, "h_size", (duk_uint_t) DUK_HOBJECT_GET_HSIZE(h_obj)); if (DUK_HOBJECT_IS_ARRAY(h_obj)) { duk_harray *h_arr; h_arr = (duk_harray *) h_obj; duk__debug_getinfo_prop_uint(thr, "length", (duk_uint_t) h_arr->length); duk__debug_getinfo_prop_bool(thr, "length_nonwritable", h_arr->length_nonwritable); } if (DUK_HOBJECT_IS_NATFUNC(h_obj)) { duk_hnatfunc *h_fun; h_fun = (duk_hnatfunc *) h_obj; duk__debug_getinfo_prop_int(thr, "nargs", h_fun->nargs); duk__debug_getinfo_prop_int(thr, "magic", h_fun->magic); duk__debug_getinfo_prop_bool(thr, "varargs", h_fun->magic == DUK_HNATFUNC_NARGS_VARARGS); /* Native function pointer may be different from a void pointer, * and we serialize it from memory directly now (no byte swapping etc). */ duk__debug_getinfo_flags_key(thr, "funcptr"); duk_debug_write_buffer(thr, (const char *) &h_fun->func, sizeof(h_fun->func)); } if (DUK_HOBJECT_IS_COMPFUNC(h_obj)) { duk_hcompfunc *h_fun; duk_hbuffer *h_buf; duk_hobject *h_lexenv; duk_hobject *h_varenv; h_fun = (duk_hcompfunc *) h_obj; duk__debug_getinfo_prop_int(thr, "nregs", h_fun->nregs); duk__debug_getinfo_prop_int(thr, "nargs", h_fun->nargs); duk__debug_getinfo_flags_key(thr, "lex_env"); h_lexenv = DUK_HCOMPFUNC_GET_LEXENV(thr->heap, h_fun); if (h_lexenv != NULL) { duk_debug_write_hobject(thr, h_lexenv); } else { duk_debug_write_null(thr); } duk__debug_getinfo_flags_key(thr, "var_env"); h_varenv = DUK_HCOMPFUNC_GET_VARENV(thr->heap, h_fun); if (h_varenv != NULL) { duk_debug_write_hobject(thr, h_varenv); } else { duk_debug_write_null(thr); } duk__debug_getinfo_prop_uint(thr, "start_line", h_fun->start_line); duk__debug_getinfo_prop_uint(thr, "end_line", h_fun->end_line); h_buf = (duk_hbuffer *) DUK_HCOMPFUNC_GET_DATA(thr->heap, h_fun); if (h_buf != NULL) { duk__debug_getinfo_flags_key(thr, "data"); duk_debug_write_heapptr(thr, (duk_heaphdr *) h_buf); } } if (DUK_HOBJECT_IS_BOUNDFUNC(h_obj)) { duk_hboundfunc *h_bfun; h_bfun = (duk_hboundfunc *) (void *) h_obj; duk__debug_getinfo_flags_key(thr, "target"); duk_debug_write_tval(thr, &h_bfun->target); duk__debug_getinfo_flags_key(thr, "this_binding"); duk_debug_write_tval(thr, &h_bfun->this_binding); duk__debug_getinfo_flags_key(thr, "nargs"); duk_debug_write_int(thr, h_bfun->nargs); /* h_bfun->args not exposed now */ } if (DUK_HOBJECT_IS_THREAD(h_obj)) { /* XXX: Currently no inspection of threads, e.g. value stack, call * stack, catch stack, etc. */ duk_hthread *h_thr; h_thr = (duk_hthread *) h_obj; DUK_UNREF(h_thr); } if (DUK_HOBJECT_IS_DECENV(h_obj)) { duk_hdecenv *h_env; h_env = (duk_hdecenv *) h_obj; duk__debug_getinfo_flags_key(thr, "thread"); duk_debug_write_heapptr(thr, (duk_heaphdr *) (h_env->thread)); duk__debug_getinfo_flags_key(thr, "varmap"); duk_debug_write_heapptr(thr, (duk_heaphdr *) (h_env->varmap)); duk__debug_getinfo_prop_uint(thr, "regbase", (duk_uint_t) h_env->regbase_byteoff); } if (DUK_HOBJECT_IS_OBJENV(h_obj)) { duk_hobjenv *h_env; h_env = (duk_hobjenv *) h_obj; duk__debug_getinfo_flags_key(thr, "target"); duk_debug_write_heapptr(thr, (duk_heaphdr *) (h_env->target)); duk__debug_getinfo_prop_bool(thr, "has_this", h_env->has_this); } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) if (DUK_HOBJECT_IS_BUFOBJ(h_obj)) { duk_hbufobj *h_bufobj; h_bufobj = (duk_hbufobj *) h_obj; duk__debug_getinfo_prop_uint(thr, "slice_offset", h_bufobj->offset); duk__debug_getinfo_prop_uint(thr, "slice_length", h_bufobj->length); duk__debug_getinfo_prop_uint(thr, "elem_shift", (duk_uint_t) h_bufobj->shift); duk__debug_getinfo_prop_uint(thr, "elem_type", (duk_uint_t) h_bufobj->elem_type); duk__debug_getinfo_prop_bool(thr, "is_typedarray", (duk_uint_t) h_bufobj->is_typedarray); if (h_bufobj->buf != NULL) { duk__debug_getinfo_flags_key(thr, "buffer"); duk_debug_write_heapptr(thr, (duk_heaphdr *) h_bufobj->buf); } } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ break; } case DUK_HTYPE_BUFFER: { duk_hbuffer *h_buf; h_buf = (duk_hbuffer *) h; duk__debug_getinfo_bitmask(thr, duk__debug_getinfo_hbuffer_keys, duk__debug_getinfo_hbuffer_masks, DUK_HEAPHDR_GET_FLAGS_RAW(h)); duk__debug_getinfo_prop_uint(thr, "size", (duk_uint_t) DUK_HBUFFER_GET_SIZE(h_buf)); duk__debug_getinfo_flags_key(thr, "dataptr"); duk_debug_write_pointer(thr, (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_buf)); duk__debug_getinfo_flags_key(thr, "data"); duk_debug_write_hbuffer(thr, h_buf); /* tolerates NULL h_buf */ break; } default: { /* Since we already started writing the reply, just emit nothing. */ DUK_D(DUK_DPRINT("inspect target pointer has invalid heaphdr type")); } } duk_debug_write_eom(thr); } DUK_LOCAL void duk__debug_handle_get_obj_prop_desc(duk_hthread *thr, duk_heap *heap) { duk_heaphdr *h; duk_hobject *h_obj; duk_hstring *h_key; duk_propdesc desc; DUK_D(DUK_DPRINT("debug command GetObjPropDesc")); DUK_UNREF(heap); h = duk_debug_read_any_ptr(thr); if (!h) { duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid target"); return; } h_key = duk_debug_read_hstring(thr); if (h == NULL || DUK_HEAPHDR_GET_TYPE(h) != DUK_HTYPE_OBJECT || h_key == NULL) { goto fail_args; } h_obj = (duk_hobject *) h; if (duk_hobject_get_own_propdesc(thr, h_obj, h_key, &desc, 0 /*flags*/)) { duk_int_t virtual_idx; duk_bool_t rc; /* To use the shared helper need the virtual index. */ DUK_ASSERT(desc.e_idx >= 0 || desc.a_idx >= 0); virtual_idx = (desc.a_idx >= 0 ? desc.a_idx : (duk_int_t) DUK_HOBJECT_GET_ASIZE(h_obj) + desc.e_idx); duk_debug_write_reply(thr); rc = duk__debug_getprop_index(thr, heap, h_obj, (duk_uint_t) virtual_idx); DUK_ASSERT(rc == 1); DUK_UNREF(rc); duk_debug_write_eom(thr); } else { duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "not found"); } return; fail_args: duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid args"); } DUK_LOCAL void duk__debug_handle_get_obj_prop_desc_range(duk_hthread *thr, duk_heap *heap) { duk_heaphdr *h; duk_hobject *h_obj; duk_uint_t idx, idx_start, idx_end; DUK_D(DUK_DPRINT("debug command GetObjPropDescRange")); DUK_UNREF(heap); h = duk_debug_read_any_ptr(thr); idx_start = (duk_uint_t) duk_debug_read_int(thr); idx_end = (duk_uint_t) duk_debug_read_int(thr); if (h == NULL || DUK_HEAPHDR_GET_TYPE(h) != DUK_HTYPE_OBJECT) { goto fail_args; } h_obj = (duk_hobject *) h; /* The index range space is conceptually the array part followed by the * entry part. Unlike normal enumeration all slots are exposed here as * is and return 'unused' if the slots are not in active use. In particular * the array part is included for the full a_size regardless of what the * array .length is. */ duk_debug_write_reply(thr); for (idx = idx_start; idx < idx_end; idx++) { if (!duk__debug_getprop_index(thr, heap, h_obj, idx)) { break; } } duk_debug_write_eom(thr); return; fail_args: duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid args"); } #endif /* DUK_USE_DEBUGGER_INSPECT */ /* * Process incoming debug requests * * Individual request handlers can push temporaries on the value stack and * rely on duk__debug_process_message() to restore the value stack top * automatically. */ /* Process one debug message. Automatically restore value stack top to its * entry value, so that individual message handlers don't need exact value * stack handling which is convenient. */ DUK_LOCAL void duk__debug_process_message(duk_hthread *thr) { duk_heap *heap; duk_uint8_t x; duk_int32_t cmd; duk_idx_t entry_top; DUK_ASSERT(thr != NULL); heap = thr->heap; DUK_ASSERT(heap != NULL); entry_top = duk_get_top(thr); x = duk_debug_read_byte(thr); switch (x) { case DUK_DBG_IB_REQUEST: { cmd = duk_debug_read_int(thr); switch (cmd) { case DUK_DBG_CMD_BASICINFO: { duk__debug_handle_basic_info(thr, heap); break; } case DUK_DBG_CMD_TRIGGERSTATUS: { duk__debug_handle_trigger_status(thr, heap); break; } case DUK_DBG_CMD_PAUSE: { duk__debug_handle_pause(thr, heap); break; } case DUK_DBG_CMD_RESUME: { duk__debug_handle_resume(thr, heap); break; } case DUK_DBG_CMD_STEPINTO: case DUK_DBG_CMD_STEPOVER: case DUK_DBG_CMD_STEPOUT: { duk__debug_handle_step(thr, heap, cmd); break; } case DUK_DBG_CMD_LISTBREAK: { duk__debug_handle_list_break(thr, heap); break; } case DUK_DBG_CMD_ADDBREAK: { duk__debug_handle_add_break(thr, heap); break; } case DUK_DBG_CMD_DELBREAK: { duk__debug_handle_del_break(thr, heap); break; } case DUK_DBG_CMD_GETVAR: { duk__debug_handle_get_var(thr, heap); break; } case DUK_DBG_CMD_PUTVAR: { duk__debug_handle_put_var(thr, heap); break; } case DUK_DBG_CMD_GETCALLSTACK: { duk__debug_handle_get_call_stack(thr, heap); break; } case DUK_DBG_CMD_GETLOCALS: { duk__debug_handle_get_locals(thr, heap); break; } case DUK_DBG_CMD_EVAL: { duk__debug_handle_eval(thr, heap); break; } case DUK_DBG_CMD_DETACH: { /* The actual detached_cb call is postponed to message loop so * we don't need any special precautions here (just skip to EOM * on the already closed connection). */ duk__debug_handle_detach(thr, heap); break; } #if defined(DUK_USE_DEBUGGER_DUMPHEAP) case DUK_DBG_CMD_DUMPHEAP: { duk__debug_handle_dump_heap(thr, heap); break; } #endif /* DUK_USE_DEBUGGER_DUMPHEAP */ case DUK_DBG_CMD_GETBYTECODE: { duk__debug_handle_get_bytecode(thr, heap); break; } case DUK_DBG_CMD_APPREQUEST: { duk__debug_handle_apprequest(thr, heap); break; } #if defined(DUK_USE_DEBUGGER_INSPECT) case DUK_DBG_CMD_GETHEAPOBJINFO: { duk__debug_handle_get_heap_obj_info(thr, heap); break; } case DUK_DBG_CMD_GETOBJPROPDESC: { duk__debug_handle_get_obj_prop_desc(thr, heap); break; } case DUK_DBG_CMD_GETOBJPROPDESCRANGE: { duk__debug_handle_get_obj_prop_desc_range(thr, heap); break; } #endif /* DUK_USE_DEBUGGER_INSPECT */ default: { DUK_D(DUK_DPRINT("debug command unsupported: %d", (int) cmd)); duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNSUPPORTED, "unsupported command"); } } /* switch cmd */ break; } case DUK_DBG_IB_REPLY: { DUK_D(DUK_DPRINT("debug reply, skipping")); break; } case DUK_DBG_IB_ERROR: { DUK_D(DUK_DPRINT("debug error, skipping")); break; } case DUK_DBG_IB_NOTIFY: { DUK_D(DUK_DPRINT("debug notify, skipping")); break; } default: { DUK_D(DUK_DPRINT("invalid initial byte, drop connection: %d", (int) x)); goto fail; } } /* switch initial byte */ DUK_ASSERT(duk_get_top(thr) >= entry_top); duk_set_top(thr, entry_top); duk__debug_skip_to_eom(thr); return; fail: DUK_ASSERT(duk_get_top(thr) >= entry_top); duk_set_top(thr, entry_top); DUK__SET_CONN_BROKEN(thr, 1); return; } DUK_LOCAL void duk__check_resend_status(duk_hthread *thr) { if (thr->heap->dbg_read_cb != NULL && thr->heap->dbg_state_dirty) { duk_debug_send_status(thr); thr->heap->dbg_state_dirty = 0; } } DUK_INTERNAL duk_bool_t duk_debug_process_messages(duk_hthread *thr, duk_bool_t no_block) { #if defined(DUK_USE_ASSERTIONS) duk_idx_t entry_top; #endif duk_bool_t retval = 0; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); #if defined(DUK_USE_ASSERTIONS) entry_top = duk_get_top(thr); #endif DUK_D(DUK_DPRINT("process debug messages: read_cb=%s, no_block=%ld, detaching=%ld, processing=%ld", thr->heap->dbg_read_cb ? "not NULL" : "NULL", (long) no_block, (long) thr->heap->dbg_detaching, (long) thr->heap->dbg_processing)); DUK_DD(DUK_DDPRINT("top at entry: %ld", (long) duk_get_top(thr))); /* thr->heap->dbg_detaching may be != 0 if a debugger write outside * the message loop caused a transport error and detach1() to run. */ DUK_ASSERT(thr->heap->dbg_detaching == 0 || thr->heap->dbg_detaching == 1); DUK_ASSERT(thr->heap->dbg_processing == 0); thr->heap->dbg_processing = 1; /* Ensure dirty state causes a Status even if never process any * messages. This is expected by the bytecode executor when in * the running state. */ duk__check_resend_status(thr); for (;;) { /* Process messages until we're no longer paused or we peek * and see there's nothing to read right now. */ DUK_DD(DUK_DDPRINT("top at loop top: %ld", (long) duk_get_top(thr))); DUK_ASSERT(thr->heap->dbg_processing == 1); while (thr->heap->dbg_read_cb == NULL && thr->heap->dbg_detaching) { /* Detach is pending; can be triggered from outside the * debugger loop (e.g. Status notify write error) or by * previous message handling. Call detached callback * here, in a controlled state, to ensure a possible * reattach inside the detached_cb is handled correctly. * * Recheck for detach in a while loop: an immediate * reattach involves a call to duk_debugger_attach() * which writes a debugger handshake line immediately * inside the API call. If the transport write fails * for that handshake, we can immediately end up in a * "transport broken, detaching" case several times here. * Loop back until we're either cleanly attached or * fully detached. * * NOTE: Reset dbg_processing = 1 forcibly, in case we * re-attached; duk_debugger_attach() sets dbg_processing * to 0 at the moment. */ DUK_D(DUK_DPRINT("detach pending (dbg_read_cb == NULL, dbg_detaching != 0), call detach2")); duk__debug_do_detach2(thr->heap); thr->heap->dbg_processing = 1; /* may be set to 0 by duk_debugger_attach() inside callback */ DUK_D(DUK_DPRINT("after detach2 (and possible reattach): dbg_read_cb=%s, dbg_detaching=%ld", thr->heap->dbg_read_cb ? "not NULL" : "NULL", (long) thr->heap->dbg_detaching)); } DUK_ASSERT(thr->heap->dbg_detaching == 0); /* true even with reattach */ DUK_ASSERT(thr->heap->dbg_processing == 1); /* even after a detach and possible reattach */ if (thr->heap->dbg_read_cb == NULL) { DUK_D(DUK_DPRINT("debug connection broken (and not detaching), stop processing messages")); break; } if (!DUK_HEAP_HAS_DEBUGGER_PAUSED(thr->heap) || no_block) { if (!duk_debug_read_peek(thr)) { /* Note: peek cannot currently trigger a detach * so the dbg_detaching == 0 assert outside the * loop is correct. */ DUK_D(DUK_DPRINT("processing debug message, peek indicated no data, stop processing messages")); break; } DUK_D(DUK_DPRINT("processing debug message, peek indicated there is data, handle it")); } else { DUK_D(DUK_DPRINT("paused, process debug message, blocking if necessary")); } duk__check_resend_status(thr); duk__debug_process_message(thr); duk__check_resend_status(thr); retval = 1; /* processed one or more messages */ } DUK_ASSERT(thr->heap->dbg_detaching == 0); DUK_ASSERT(thr->heap->dbg_processing == 1); thr->heap->dbg_processing = 0; /* As an initial implementation, read flush after exiting the message * loop. If transport is broken, this is a no-op (with debug logs). */ duk_debug_read_flush(thr); /* this cannot initiate a detach */ DUK_ASSERT(thr->heap->dbg_detaching == 0); DUK_DD(DUK_DDPRINT("top at exit: %ld", (long) duk_get_top(thr))); #if defined(DUK_USE_ASSERTIONS) /* Easy to get wrong, so assert for it. */ DUK_ASSERT(entry_top == duk_get_top(thr)); #endif return retval; } /* * Halt execution helper */ /* Halt execution and enter a debugger message loop until execution is resumed * by the client. PC for the current activation may be temporarily decremented * so that the "current" instruction will be shown by the client. This helper * is callable from anywhere, also outside bytecode executor. */ DUK_INTERNAL void duk_debug_halt_execution(duk_hthread *thr, duk_bool_t use_prev_pc) { duk_activation *act; duk_hcompfunc *fun; duk_instr_t *old_pc = NULL; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(duk_debug_is_attached(thr->heap)); DUK_ASSERT(thr->heap->dbg_processing == 0); DUK_ASSERT(!duk_debug_is_paused(thr->heap)); duk_debug_set_paused(thr->heap); act = thr->callstack_curr; /* NOTE: act may be NULL if an error is thrown outside of any activation, * which may happen in the case of, e.g. syntax errors. */ /* Decrement PC if that was requested, this requires a PC sync. */ if (act != NULL) { duk_hthread_sync_currpc(thr); old_pc = act->curr_pc; fun = (duk_hcompfunc *) DUK_ACT_GET_FUNC(act); /* Short circuit if is safe: if act->curr_pc != NULL, 'fun' is * guaranteed to be a non-NULL ECMAScript function. */ DUK_ASSERT(act->curr_pc == NULL || (fun != NULL && DUK_HOBJECT_IS_COMPFUNC((duk_hobject *) fun))); if (use_prev_pc && act->curr_pc != NULL && act->curr_pc > DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, fun)) { act->curr_pc--; } } /* Process debug messages until we are no longer paused. */ /* NOTE: This is a bit fragile. It's important to ensure that * duk_debug_process_messages() never throws an error or * act->curr_pc will never be reset. */ thr->heap->dbg_state_dirty = 1; while (DUK_HEAP_HAS_DEBUGGER_PAUSED(thr->heap)) { DUK_ASSERT(duk_debug_is_attached(thr->heap)); DUK_ASSERT(thr->heap->dbg_processing == 0); duk_debug_process_messages(thr, 0 /*no_block*/); } /* XXX: Decrementing and restoring act->curr_pc works now, but if the * debugger message loop gains the ability to adjust the current PC * (e.g. a forced jump) restoring the PC here will break. Another * approach would be to use a state flag for the "decrement 1 from * topmost activation's PC" and take it into account whenever dealing * with PC values. */ if (act != NULL) { act->curr_pc = old_pc; /* restore PC */ } } /* * Breakpoint management */ DUK_INTERNAL duk_small_int_t duk_debug_add_breakpoint(duk_hthread *thr, duk_hstring *filename, duk_uint32_t line) { duk_heap *heap; duk_breakpoint *b; /* Caller must trigger recomputation of active breakpoint list. To * ensure stale values are not used if that doesn't happen, clear the * active breakpoint list here. */ DUK_ASSERT(thr != NULL); DUK_ASSERT(filename != NULL); heap = thr->heap; DUK_ASSERT(heap != NULL); if (heap->dbg_breakpoint_count >= DUK_HEAP_MAX_BREAKPOINTS) { DUK_D(DUK_DPRINT("failed to add breakpoint for %O:%ld, all breakpoint slots used", (duk_heaphdr *) filename, (long) line)); return -1; } heap->dbg_breakpoints_active[0] = (duk_breakpoint *) NULL; b = heap->dbg_breakpoints + (heap->dbg_breakpoint_count++); b->filename = filename; b->line = line; DUK_HSTRING_INCREF(thr, filename); return (duk_small_int_t) (heap->dbg_breakpoint_count - 1); /* index */ } DUK_INTERNAL duk_bool_t duk_debug_remove_breakpoint(duk_hthread *thr, duk_small_uint_t breakpoint_index) { duk_heap *heap; duk_hstring *h; duk_breakpoint *b; duk_size_t move_size; /* Caller must trigger recomputation of active breakpoint list. To * ensure stale values are not used if that doesn't happen, clear the * active breakpoint list here. */ DUK_ASSERT(thr != NULL); heap = thr->heap; DUK_ASSERT(heap != NULL); DUK_ASSERT(duk_debug_is_attached(thr->heap)); DUK_ASSERT_DISABLE(breakpoint_index >= 0); /* unsigned */ if (breakpoint_index >= heap->dbg_breakpoint_count) { DUK_D(DUK_DPRINT("invalid breakpoint index: %ld", (long) breakpoint_index)); return 0; } b = heap->dbg_breakpoints + breakpoint_index; h = b->filename; DUK_ASSERT(h != NULL); move_size = sizeof(duk_breakpoint) * (heap->dbg_breakpoint_count - breakpoint_index - 1); duk_memmove((void *) b, (const void *) (b + 1), (size_t) move_size); heap->dbg_breakpoint_count--; heap->dbg_breakpoints_active[0] = (duk_breakpoint *) NULL; DUK_HSTRING_DECREF(thr, h); /* side effects */ DUK_UNREF(h); /* w/o refcounting */ /* Breakpoint entries above the used area are left as garbage. */ return 1; } /* * Misc state management */ DUK_INTERNAL duk_bool_t duk_debug_is_attached(duk_heap *heap) { return (heap->dbg_read_cb != NULL); } DUK_INTERNAL duk_bool_t duk_debug_is_paused(duk_heap *heap) { return (DUK_HEAP_HAS_DEBUGGER_PAUSED(heap) != 0); } DUK_INTERNAL void duk_debug_set_paused(duk_heap *heap) { if (duk_debug_is_paused(heap)) { DUK_D(DUK_DPRINT("trying to set paused state when already paused, ignoring")); } else { DUK_HEAP_SET_DEBUGGER_PAUSED(heap); heap->dbg_state_dirty = 1; duk_debug_clear_pause_state(heap); DUK_ASSERT(heap->ms_running == 0); /* debugger can't be triggered within mark-and-sweep */ heap->ms_running = 2; /* prevent mark-and-sweep, prevent refzero queueing */ heap->ms_prevent_count++; DUK_ASSERT(heap->ms_prevent_count != 0); /* Wrap. */ DUK_ASSERT(heap->heap_thread != NULL); } } DUK_INTERNAL void duk_debug_clear_paused(duk_heap *heap) { if (duk_debug_is_paused(heap)) { DUK_HEAP_CLEAR_DEBUGGER_PAUSED(heap); heap->dbg_state_dirty = 1; duk_debug_clear_pause_state(heap); DUK_ASSERT(heap->ms_running == 2); DUK_ASSERT(heap->ms_prevent_count > 0); heap->ms_prevent_count--; heap->ms_running = 0; DUK_ASSERT(heap->heap_thread != NULL); } else { DUK_D(DUK_DPRINT("trying to clear paused state when not paused, ignoring")); } } DUK_INTERNAL void duk_debug_clear_pause_state(duk_heap *heap) { heap->dbg_pause_flags = 0; heap->dbg_pause_act = NULL; heap->dbg_pause_startline = 0; } #else /* DUK_USE_DEBUGGER_SUPPORT */ /* No debugger support. */ #endif /* DUK_USE_DEBUGGER_SUPPORT */ /* automatic undefs */ #undef DUK__DBG_TPORT_ENTER #undef DUK__DBG_TPORT_EXIT #undef DUK__SET_CONN_BROKEN /* * Augmenting errors at their creation site and their throw site. * * When errors are created, traceback data is added by built-in code * and a user error handler (if defined) can process or replace the * error. Similarly, when errors are thrown, a user error handler * (if defined) can process or replace the error. * * Augmentation and other processing at error creation time is nice * because an error is only created once, but it may be thrown and * rethrown multiple times. User error handler registered for processing * an error at its throw site must be careful to handle rethrowing in * a useful manner. * * Error augmentation may throw an internal error (e.g. alloc error). * * ECMAScript allows throwing any values, so all values cannot be * augmented. Currently, the built-in augmentation at error creation * only augments error values which are Error instances (= have the * built-in Error.prototype in their prototype chain) and are also * extensible. User error handlers have no limitations in this respect. */ /* #include duk_internal.h -> already included */ /* * Helper for calling a user error handler. * * 'thr' must be the currently active thread; the error handler is called * in its context. The valstack of 'thr' must have the error value on * top, and will be replaced by another error value based on the return * value of the error handler. * * The helper calls duk_handle_call() recursively in protected mode. * Before that call happens, no longjmps should happen; as a consequence, * we must assume that the valstack contains enough temporary space for * arguments and such. * * While the error handler runs, any errors thrown will not trigger a * recursive error handler call (this is implemented using a heap level * flag which will "follow" through any coroutines resumed inside the * error handler). If the error handler is not callable or throws an * error, the resulting error replaces the original error (for Duktape * internal errors, duk_error_throw.c further substitutes this error with * a DoubleError which is not ideal). This would be easy to change and * even signal to the caller. * * The user error handler is stored in 'Duktape.errCreate' or * 'Duktape.errThrow' depending on whether we're augmenting the error at * creation or throw time. There are several alternatives to this approach, * see doc/error-objects.rst for discussion. * * Note: since further longjmp()s may occur while calling the error handler * (for many reasons, e.g. a labeled 'break' inside the handler), the * caller can make no assumptions on the thr->heap->lj state after the * call (this affects especially duk_error_throw.c). This is not an issue * as long as the caller writes to the lj state only after the error handler * finishes. */ #if defined(DUK_USE_ERRTHROW) || defined(DUK_USE_ERRCREATE) DUK_LOCAL void duk__err_augment_user(duk_hthread *thr, duk_small_uint_t stridx_cb) { duk_tval *tv_hnd; duk_int_t rc; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT_STRIDX_VALID(stridx_cb); if (thr->heap->augmenting_error) { DUK_D(DUK_DPRINT("recursive call to error augmentation, ignore")); return; } /* * Check whether or not we have an error handler. * * We must be careful of not triggering an error when looking up the * property. For instance, if the property is a getter, we don't want * to call it, only plain values are allowed. The value, if it exists, * is not checked. If the value is not a function, a TypeError happens * when it is called and that error replaces the original one. */ DUK_ASSERT_VALSTACK_SPACE(thr, 4); /* 3 entries actually needed below */ /* [ ... errval ] */ if (thr->builtins[DUK_BIDX_DUKTAPE] == NULL) { /* When creating built-ins, some of the built-ins may not be set * and we want to tolerate that when throwing errors. */ DUK_DD(DUK_DDPRINT("error occurred when DUK_BIDX_DUKTAPE is NULL, ignoring")); return; } tv_hnd = duk_hobject_find_entry_tval_ptr_stridx(thr->heap, thr->builtins[DUK_BIDX_DUKTAPE], stridx_cb); if (tv_hnd == NULL) { DUK_DD(DUK_DDPRINT("error handler does not exist or is not a plain value: %!T", (duk_tval *) tv_hnd)); return; } DUK_DDD(DUK_DDDPRINT("error handler dump (callability not checked): %!T", (duk_tval *) tv_hnd)); duk_push_tval(thr, tv_hnd); /* [ ... errval errhandler ] */ duk_insert(thr, -2); /* -> [ ... errhandler errval ] */ duk_push_undefined(thr); duk_insert(thr, -2); /* -> [ ... errhandler undefined(= this) errval ] */ /* [ ... errhandler undefined errval ] */ /* * heap->augmenting_error prevents recursive re-entry and also causes * call handling to use a larger (but not unbounded) call stack limit * for the duration of error augmentation. * * We ignore errors now: a success return and an error value both * replace the original error value. (This would be easy to change.) */ DUK_ASSERT(thr->heap->augmenting_error == 0); thr->heap->augmenting_error = 1; rc = duk_pcall_method(thr, 1); DUK_UNREF(rc); /* no need to check now: both success and error are OK */ DUK_ASSERT(thr->heap->augmenting_error == 1); thr->heap->augmenting_error = 0; /* [ ... errval ] */ } #endif /* DUK_USE_ERRTHROW || DUK_USE_ERRCREATE */ /* * Add ._Tracedata to an error on the stack top. */ #if defined(DUK_USE_TRACEBACKS) DUK_LOCAL void duk__add_traceback(duk_hthread *thr, duk_hthread *thr_callstack, const char *c_filename, duk_int_t c_line, duk_small_uint_t flags) { duk_activation *act; duk_int_t depth; duk_int_t arr_size; duk_tval *tv; duk_hstring *s; duk_uint32_t u32; duk_double_t d; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr_callstack != NULL); /* [ ... error ] */ /* * The traceback format is pretty arcane in an attempt to keep it compact * and cheap to create. It may change arbitrarily from version to version. * It should be decoded/accessed through version specific accessors only. * * See doc/error-objects.rst. */ DUK_DDD(DUK_DDDPRINT("adding traceback to object: %!T", (duk_tval *) duk_get_tval(thr, -1))); /* Preallocate array to correct size, so that we can just write out * the _Tracedata values into the array part. */ act = thr->callstack_curr; depth = DUK_USE_TRACEBACK_DEPTH; DUK_ASSERT(thr_callstack->callstack_top <= DUK_INT_MAX); /* callstack limits */ if (depth > (duk_int_t) thr_callstack->callstack_top) { depth = (duk_int_t) thr_callstack->callstack_top; } if (depth > 0) { if (flags & DUK_AUGMENT_FLAG_SKIP_ONE) { DUK_ASSERT(act != NULL); act = act->parent; depth--; } } arr_size = depth * 2; if (thr->compile_ctx != NULL && thr->compile_ctx->h_filename != NULL) { arr_size += 2; } if (c_filename) { /* We need the C filename to be interned before getting the * array part pointer to avoid any GC interference while the * array part is populated. */ duk_push_string(thr, c_filename); arr_size += 2; } /* XXX: Uninitialized would be OK. Maybe add internal primitive to * push bare duk_harray with size? */ DUK_D(DUK_DPRINT("preallocated _Tracedata to %ld items", (long) arr_size)); tv = duk_push_harray_with_size_outptr(thr, (duk_uint32_t) arr_size); duk_clear_prototype(thr, -1); DUK_ASSERT(duk_is_bare_object(thr, -1)); DUK_ASSERT(arr_size == 0 || tv != NULL); /* Compiler SyntaxErrors (and other errors) come first, and are * blamed by default (not flagged "noblame"). */ if (thr->compile_ctx != NULL && thr->compile_ctx->h_filename != NULL) { s = thr->compile_ctx->h_filename; DUK_TVAL_SET_STRING(tv, s); DUK_HSTRING_INCREF(thr, s); tv++; u32 = (duk_uint32_t) thr->compile_ctx->curr_token.start_line; /* (flags<<32) + (line), flags = 0 */ DUK_TVAL_SET_U32(tv, u32); tv++; } /* Filename/line from C macros (__FILE__, __LINE__) are added as an * entry with a special format: (string, number). The number contains * the line and flags. */ /* [ ... error c_filename? arr ] */ if (c_filename) { DUK_ASSERT(DUK_TVAL_IS_STRING(thr->valstack_top - 2)); s = DUK_TVAL_GET_STRING(thr->valstack_top - 2); /* interned c_filename */ DUK_ASSERT(s != NULL); DUK_TVAL_SET_STRING(tv, s); DUK_HSTRING_INCREF(thr, s); tv++; d = ((flags & DUK_AUGMENT_FLAG_NOBLAME_FILELINE) ? ((duk_double_t) DUK_TB_FLAG_NOBLAME_FILELINE) * DUK_DOUBLE_2TO32 : 0.0) + (duk_double_t) c_line; DUK_TVAL_SET_DOUBLE(tv, d); tv++; } /* Traceback depth doesn't take into account the filename/line * special handling above (intentional). */ for (; depth-- > 0; act = act->parent) { duk_uint32_t pc; duk_tval *tv_src; /* [... arr] */ DUK_ASSERT(act != NULL); /* depth check above, assumes book-keeping is correct */ DUK_ASSERT_DISABLE(act->pc >= 0); /* unsigned */ /* Add function object. */ tv_src = &act->tv_func; /* object (function) or lightfunc */ DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv_src) || DUK_TVAL_IS_LIGHTFUNC(tv_src)); DUK_TVAL_SET_TVAL(tv, tv_src); DUK_TVAL_INCREF(thr, tv); tv++; /* Add a number containing: pc, activation flags. * * PC points to next instruction, find offending PC. Note that * PC == 0 for native code. */ pc = (duk_uint32_t) duk_hthread_get_act_prev_pc(thr_callstack, act); DUK_ASSERT_DISABLE(pc >= 0); /* unsigned */ DUK_ASSERT((duk_double_t) pc < DUK_DOUBLE_2TO32); /* assume PC is at most 32 bits and non-negative */ d = ((duk_double_t) act->flags) * DUK_DOUBLE_2TO32 + (duk_double_t) pc; DUK_TVAL_SET_DOUBLE(tv, d); tv++; } #if defined(DUK_USE_ASSERTIONS) { duk_harray *a; a = (duk_harray *) duk_known_hobject(thr, -1); DUK_ASSERT(a != NULL); DUK_ASSERT((duk_uint32_t) (tv - DUK_HOBJECT_A_GET_BASE(thr->heap, (duk_hobject *) a)) == a->length); DUK_ASSERT(a->length == (duk_uint32_t) arr_size); DUK_ASSERT(duk_is_bare_object(thr, -1)); } #endif /* [ ... error c_filename? arr ] */ if (c_filename) { duk_remove_m2(thr); } /* [ ... error arr ] */ duk_xdef_prop_stridx_short_wec(thr, -2, DUK_STRIDX_INT_TRACEDATA); /* -> [ ... error ] */ } #endif /* DUK_USE_TRACEBACKS */ /* * Add .fileName and .lineNumber to an error on the stack top. */ #if defined(DUK_USE_AUGMENT_ERROR_CREATE) && !defined(DUK_USE_TRACEBACKS) DUK_LOCAL void duk__add_fileline(duk_hthread *thr, duk_hthread *thr_callstack, const char *c_filename, duk_int_t c_line, duk_small_uint_t flags) { #if defined(DUK_USE_ASSERTIONS) duk_int_t entry_top; #endif #if defined(DUK_USE_ASSERTIONS) entry_top = duk_get_top(thr); #endif /* * If tracebacks are disabled, 'fileName' and 'lineNumber' are added * as plain own properties. Since Error.prototype has accessors of * the same name, we need to define own properties directly (cannot * just use e.g. duk_put_prop_stridx). Existing properties are not * overwritten in case they already exist. */ if (thr->compile_ctx != NULL && thr->compile_ctx->h_filename != NULL) { /* Compiler SyntaxError (or other error) gets the primary blame. * Currently no flag to prevent blaming. */ duk_push_uint(thr, (duk_uint_t) thr->compile_ctx->curr_token.start_line); duk_push_hstring(thr, thr->compile_ctx->h_filename); } else if (c_filename && (flags & DUK_AUGMENT_FLAG_NOBLAME_FILELINE) == 0) { /* C call site gets blamed next, unless flagged not to do so. * XXX: file/line is disabled in minimal builds, so disable this * too when appropriate. */ duk_push_int(thr, c_line); duk_push_string(thr, c_filename); } else { /* Finally, blame the innermost callstack entry which has a * .fileName property. */ duk_small_uint_t depth; duk_uint32_t ecma_line; duk_activation *act; DUK_ASSERT(thr_callstack->callstack_top <= DUK_INT_MAX); /* callstack limits */ depth = DUK_USE_TRACEBACK_DEPTH; if (depth > thr_callstack->callstack_top) { depth = thr_callstack->callstack_top; } for (act = thr_callstack->callstack_curr; depth-- > 0; act = act->parent) { duk_hobject *func; duk_uint32_t pc; DUK_ASSERT(act != NULL); func = DUK_ACT_GET_FUNC(act); if (func == NULL) { /* Lightfunc, not blamed now. */ continue; } /* PC points to next instruction, find offending PC, * PC == 0 for native code. */ pc = duk_hthread_get_act_prev_pc(thr, act); /* thr argument only used for thr->heap, so specific thread doesn't matter */ DUK_UNREF(pc); DUK_ASSERT_DISABLE(pc >= 0); /* unsigned */ DUK_ASSERT((duk_double_t) pc < DUK_DOUBLE_2TO32); /* assume PC is at most 32 bits and non-negative */ duk_push_hobject(thr, func); /* [ ... error func ] */ duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_FILE_NAME); if (!duk_is_string_notsymbol(thr, -1)) { duk_pop_2(thr); continue; } /* [ ... error func fileName ] */ ecma_line = 0; #if defined(DUK_USE_PC2LINE) if (DUK_HOBJECT_IS_COMPFUNC(func)) { ecma_line = duk_hobject_pc2line_query(thr, -2, (duk_uint_fast32_t) pc); } else { /* Native function, no relevant lineNumber. */ } #endif /* DUK_USE_PC2LINE */ duk_push_u32(thr, ecma_line); /* [ ... error func fileName lineNumber ] */ duk_replace(thr, -3); /* [ ... error lineNumber fileName ] */ goto define_props; } /* No activation matches, use undefined for both .fileName and * .lineNumber (matches what we do with a _Tracedata based * no-match lookup. */ duk_push_undefined(thr); duk_push_undefined(thr); } define_props: /* [ ... error lineNumber fileName ] */ #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(duk_get_top(thr) == entry_top + 2); #endif duk_xdef_prop_stridx_short(thr, -3, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_C | DUK_PROPDESC_FLAG_NO_OVERWRITE); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LINE_NUMBER, DUK_PROPDESC_FLAGS_C | DUK_PROPDESC_FLAG_NO_OVERWRITE); } #endif /* DUK_USE_AUGMENT_ERROR_CREATE && !DUK_USE_TRACEBACKS */ /* * Add line number to a compiler error. */ #if defined(DUK_USE_AUGMENT_ERROR_CREATE) DUK_LOCAL void duk__add_compiler_error_line(duk_hthread *thr) { /* Append a "(line NNN)" to the "message" property of any error * thrown during compilation. Usually compilation errors are * SyntaxErrors but they can also be out-of-memory errors and * the like. */ /* [ ... error ] */ DUK_ASSERT(duk_is_object(thr, -1)); if (!(thr->compile_ctx != NULL && thr->compile_ctx->h_filename != NULL)) { return; } DUK_DDD(DUK_DDDPRINT("compile error, before adding line info: %!T", (duk_tval *) duk_get_tval(thr, -1))); if (duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_MESSAGE)) { duk_push_sprintf(thr, " (line %ld)", (long) thr->compile_ctx->curr_token.start_line); duk_concat(thr, 2); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_MESSAGE); } else { duk_pop(thr); } DUK_DDD(DUK_DDDPRINT("compile error, after adding line info: %!T", (duk_tval *) duk_get_tval(thr, -1))); } #endif /* DUK_USE_AUGMENT_ERROR_CREATE */ /* * Augment an error being created using Duktape specific properties * like _Tracedata or .fileName/.lineNumber. */ #if defined(DUK_USE_AUGMENT_ERROR_CREATE) DUK_LOCAL void duk__err_augment_builtin_create(duk_hthread *thr, duk_hthread *thr_callstack, const char *c_filename, duk_int_t c_line, duk_hobject *obj, duk_small_uint_t flags) { #if defined(DUK_USE_ASSERTIONS) duk_int_t entry_top; #endif #if defined(DUK_USE_ASSERTIONS) entry_top = duk_get_top(thr); #endif DUK_ASSERT(obj != NULL); DUK_UNREF(obj); /* unreferenced w/o tracebacks */ duk__add_compiler_error_line(thr); #if defined(DUK_USE_TRACEBACKS) /* If tracebacks are enabled, the '_Tracedata' property is the only * thing we need: 'fileName' and 'lineNumber' are virtual properties * which use '_Tracedata'. (Check _Tracedata only as own property.) */ if (duk_hobject_find_entry_tval_ptr_stridx(thr->heap, obj, DUK_STRIDX_INT_TRACEDATA) != NULL) { DUK_DDD(DUK_DDDPRINT("error value already has a '_Tracedata' property, not modifying it")); } else { duk__add_traceback(thr, thr_callstack, c_filename, c_line, flags); } #else /* Without tracebacks the concrete .fileName and .lineNumber need * to be added directly. */ duk__add_fileline(thr, thr_callstack, c_filename, c_line, flags); #endif #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(duk_get_top(thr) == entry_top); #endif } #endif /* DUK_USE_AUGMENT_ERROR_CREATE */ /* * Augment an error at creation time with _Tracedata/fileName/lineNumber * and allow a user error handler (if defined) to process/replace the error. * The error to be augmented is at the stack top. * * thr: thread containing the error value * thr_callstack: thread which should be used for generating callstack etc. * c_filename: C __FILE__ related to the error * c_line: C __LINE__ related to the error * flags & DUK_AUGMENT_FLAG_NOBLAME_FILELINE: * if true, don't fileName/line as error source, otherwise use traceback * (needed because user code filename/line are reported but internal ones * are not) */ #if defined(DUK_USE_AUGMENT_ERROR_CREATE) DUK_INTERNAL void duk_err_augment_error_create(duk_hthread *thr, duk_hthread *thr_callstack, const char *c_filename, duk_int_t c_line, duk_small_uint_t flags) { duk_hobject *obj; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr_callstack != NULL); /* [ ... error ] */ /* * Criteria for augmenting: * * - augmentation enabled in build (naturally) * - error value internal prototype chain contains the built-in * Error prototype object (i.e. 'val instanceof Error') * * Additional criteria for built-in augmenting: * * - error value is an extensible object */ obj = duk_get_hobject(thr, -1); if (!obj) { DUK_DDD(DUK_DDDPRINT("value is not an object, skip both built-in and user augment")); return; } if (!duk_hobject_prototype_chain_contains(thr, obj, thr->builtins[DUK_BIDX_ERROR_PROTOTYPE], 1 /*ignore_loop*/)) { /* If the value has a prototype loop, it's critical not to * throw here. Instead, assume the value is not to be * augmented. */ DUK_DDD(DUK_DDDPRINT("value is not an error instance, skip both built-in and user augment")); return; } if (DUK_HOBJECT_HAS_EXTENSIBLE(obj)) { DUK_DDD(DUK_DDDPRINT("error meets criteria, built-in augment")); duk__err_augment_builtin_create(thr, thr_callstack, c_filename, c_line, obj, flags); } else { DUK_DDD(DUK_DDDPRINT("error does not meet criteria, no built-in augment")); } /* [ ... error ] */ #if defined(DUK_USE_ERRCREATE) duk__err_augment_user(thr, DUK_STRIDX_ERR_CREATE); #endif } #endif /* DUK_USE_AUGMENT_ERROR_CREATE */ /* * Augment an error at throw time; allow a user error handler (if defined) * to process/replace the error. The error to be augmented is at the * stack top. */ #if defined(DUK_USE_AUGMENT_ERROR_THROW) DUK_INTERNAL void duk_err_augment_error_throw(duk_hthread *thr) { #if defined(DUK_USE_ERRTHROW) duk__err_augment_user(thr, DUK_STRIDX_ERR_THROW); #endif /* DUK_USE_ERRTHROW */ } #endif /* DUK_USE_AUGMENT_ERROR_THROW */ /* * Do a longjmp call, calling the fatal error handler if no * catchpoint exists. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_PREFER_SIZE) DUK_NORETURN(DUK_LOCAL_DECL void duk__uncaught_minimal(duk_hthread *thr)); DUK_LOCAL void duk__uncaught_minimal(duk_hthread *thr) { (void) duk_fatal(thr, "uncaught error"); DUK_WO_NORETURN(return;); } #endif #if 0 DUK_NORETURN(DUK_LOCAL_DECL void duk__uncaught_readable(duk_hthread *thr)); DUK_LOCAL void duk__uncaught_readable(duk_hthread *thr) { const char *summary; char buf[DUK_USE_FATAL_MAXLEN]; summary = duk_push_string_tval_readable(thr, &thr->heap->lj.value1); DUK_SNPRINTF(buf, sizeof(buf), "uncaught: %s", summary); buf[sizeof(buf) - 1] = (char) 0; (void) duk_fatal(thr, (const char *) buf); DUK_WO_NORETURN(return;); } #endif #if !defined(DUK_USE_PREFER_SIZE) DUK_NORETURN(DUK_LOCAL_DECL void duk__uncaught_error_aware(duk_hthread *thr)); DUK_LOCAL void duk__uncaught_error_aware(duk_hthread *thr) { const char *summary; char buf[DUK_USE_FATAL_MAXLEN]; summary = duk_push_string_tval_readable_error(thr, &thr->heap->lj.value1); DUK_ASSERT(summary != NULL); DUK_SNPRINTF(buf, sizeof(buf), "uncaught: %s", summary); buf[sizeof(buf) - 1] = (char) 0; (void) duk_fatal(thr, (const char *) buf); DUK_WO_NORETURN(return;); } #endif DUK_INTERNAL void duk_err_longjmp(duk_hthread *thr) { DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_DD(DUK_DDPRINT("longjmp error: type=%d iserror=%d value1=%!T value2=%!T", (int) thr->heap->lj.type, (int) thr->heap->lj.iserror, &thr->heap->lj.value1, &thr->heap->lj.value2)); /* Prevent finalizer execution during error handling. All error * handling sites will process pending finalizers once error handling * is complete and we're ready for the side effects. Does not prevent * refzero freeing or mark-and-sweep during error handling. * * NOTE: when we come here some calling code may have used DECREF * NORZ macros without an explicit DUK_REFZERO_CHECK_xxx() call. * We don't want to do it here because it would just check for * pending finalizers and we prevent that explicitly. Instead, * the error catcher will run the finalizers once error handling * is complete. */ DUK_ASSERT_LJSTATE_SET(thr->heap); thr->heap->pf_prevent_count++; DUK_ASSERT(thr->heap->pf_prevent_count != 0); /* Wrap. */ #if defined(DUK_USE_ASSERTIONS) /* XXX: set this immediately when longjmp state is set */ DUK_ASSERT(thr->heap->error_not_allowed == 0); /* Detect error within critical section. */ thr->heap->error_not_allowed = 1; #endif DUK_DD(DUK_DDPRINT("about to longjmp, pf_prevent_count=%ld", (long) thr->heap->pf_prevent_count)); /* If we don't have a jmpbuf_ptr, there is little we can do except * cause a fatal error. The caller's expectation is that we never * return. */ if (!thr->heap->lj.jmpbuf_ptr) { DUK_D(DUK_DPRINT("uncaught error: type=%d iserror=%d value1=%!T value2=%!T", (int) thr->heap->lj.type, (int) thr->heap->lj.iserror, &thr->heap->lj.value1, &thr->heap->lj.value2)); #if defined(DUK_USE_PREFER_SIZE) duk__uncaught_minimal(thr); #else duk__uncaught_error_aware(thr); #endif DUK_UNREACHABLE(); } #if defined(DUK_USE_CPP_EXCEPTIONS) throw duk_internal_exception(); /* dummy */ #else DUK_LONGJMP(thr->heap->lj.jmpbuf_ptr->jb); #endif DUK_UNREACHABLE(); } /* * Error helpers */ /* #include duk_internal.h -> already included */ /* * Helper to walk the thread chain and see if there is an active error * catcher. Protected calls or finally blocks aren't considered catching. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_LOCAL duk_bool_t duk__have_active_catcher(duk_hthread *thr) { /* As noted above, a protected API call won't be counted as a * catcher. This is usually convenient, e.g. in the case of a top- * level duk_pcall(), but may not always be desirable. Perhaps add * an argument to treat them as catchers? */ duk_activation *act; duk_catcher *cat; DUK_ASSERT(thr != NULL); for (; thr != NULL; thr = thr->resumer) { for (act = thr->callstack_curr; act != NULL; act = act->parent) { for (cat = act->cat; cat != NULL; cat = cat->parent) { if (DUK_CAT_HAS_CATCH_ENABLED(cat)) { return 1; /* all we need to know */ } } } } return 0; } #endif /* DUK_USE_DEBUGGER_SUPPORT */ /* * Get prototype object for an integer error code. */ DUK_INTERNAL duk_hobject *duk_error_prototype_from_code(duk_hthread *thr, duk_errcode_t code) { switch (code) { case DUK_ERR_EVAL_ERROR: return thr->builtins[DUK_BIDX_EVAL_ERROR_PROTOTYPE]; case DUK_ERR_RANGE_ERROR: return thr->builtins[DUK_BIDX_RANGE_ERROR_PROTOTYPE]; case DUK_ERR_REFERENCE_ERROR: return thr->builtins[DUK_BIDX_REFERENCE_ERROR_PROTOTYPE]; case DUK_ERR_SYNTAX_ERROR: return thr->builtins[DUK_BIDX_SYNTAX_ERROR_PROTOTYPE]; case DUK_ERR_TYPE_ERROR: return thr->builtins[DUK_BIDX_TYPE_ERROR_PROTOTYPE]; case DUK_ERR_URI_ERROR: return thr->builtins[DUK_BIDX_URI_ERROR_PROTOTYPE]; case DUK_ERR_ERROR: default: return thr->builtins[DUK_BIDX_ERROR_PROTOTYPE]; } } /* * Helper for debugger throw notify and pause-on-uncaught integration. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_INTERNAL void duk_err_check_debugger_integration(duk_hthread *thr) { duk_bool_t uncaught; duk_tval *tv_obj; /* If something is thrown with the debugger attached and nobody will * catch it, execution is paused before the longjmp, turning over * control to the debug client. This allows local state to be examined * before the stack is unwound. Errors are not intercepted when debug * message loop is active (e.g. for Eval). */ DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); /* XXX: Allow customizing the pause and notify behavior at runtime * using debugger runtime flags. For now the behavior is fixed using * config options. */ if (!duk_debug_is_attached(thr->heap) || thr->heap->dbg_processing || thr->heap->lj.type != DUK_LJ_TYPE_THROW || thr->heap->creating_error) { DUK_D(DUK_DPRINT("skip debugger error integration; not attached, debugger processing, not THROW, or error thrown while creating error")); return; } /* Don't intercept a DoubleError, we may have caused the initial double * fault and attempting to intercept it will cause us to be called * recursively and exhaust the C stack. (This should no longer happen * for the initial throw because DoubleError path doesn't do a debugger * integration check, but it might happen for rethrows.) */ tv_obj = &thr->heap->lj.value1; if (DUK_TVAL_IS_OBJECT(tv_obj) && DUK_TVAL_GET_OBJECT(tv_obj) == thr->builtins[DUK_BIDX_DOUBLE_ERROR]) { DUK_D(DUK_DPRINT("built-in DoubleError instance (re)thrown, not intercepting")); return; } uncaught = !duk__have_active_catcher(thr); /* Debugger code expects the value at stack top. This also serves * as a backup: we need to store/restore the longjmp state because * when the debugger is paused Eval commands may be executed and * they can arbitrarily clobber the longjmp state. */ duk_push_tval(thr, tv_obj); /* Store and reset longjmp state. */ DUK_ASSERT_LJSTATE_SET(thr->heap); DUK_TVAL_DECREF_NORZ(thr, tv_obj); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value2)); /* Always for THROW type. */ DUK_TVAL_SET_UNDEFINED(tv_obj); thr->heap->lj.type = DUK_LJ_TYPE_UNKNOWN; DUK_ASSERT_LJSTATE_UNSET(thr->heap); #if defined(DUK_USE_DEBUGGER_THROW_NOTIFY) /* Report it to the debug client */ DUK_D(DUK_DPRINT("throw with debugger attached, report to client")); duk_debug_send_throw(thr, uncaught); #endif if (uncaught) { if (thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_UNCAUGHT_ERROR) { DUK_D(DUK_DPRINT("PAUSE TRIGGERED by uncaught error")); duk_debug_halt_execution(thr, 1 /*use_prev_pc*/); } } else { if (thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_CAUGHT_ERROR) { DUK_D(DUK_DPRINT("PAUSE TRIGGERED by caught error")); duk_debug_halt_execution(thr, 1 /*use_prev_pc*/); } } /* Restore longjmp state. */ DUK_ASSERT_LJSTATE_UNSET(thr->heap); thr->heap->lj.type = DUK_LJ_TYPE_THROW; tv_obj = DUK_GET_TVAL_NEGIDX(thr, -1); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value1)); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value2)); DUK_TVAL_SET_TVAL(&thr->heap->lj.value1, tv_obj); DUK_TVAL_INCREF(thr, tv_obj); DUK_ASSERT_LJSTATE_SET(thr->heap); duk_pop(thr); } #endif /* DUK_USE_DEBUGGER_SUPPORT */ /* * Helpers for setting up heap longjmp state. */ DUK_INTERNAL void duk_err_setup_ljstate1(duk_hthread *thr, duk_small_uint_t lj_type, duk_tval *tv_val) { duk_heap *heap; DUK_ASSERT(thr != NULL); heap = thr->heap; DUK_ASSERT(heap != NULL); DUK_ASSERT(tv_val != NULL); DUK_ASSERT_LJSTATE_UNSET(heap); heap->lj.type = lj_type; DUK_TVAL_SET_TVAL(&heap->lj.value1, tv_val); DUK_TVAL_INCREF(thr, tv_val); DUK_ASSERT_LJSTATE_SET(heap); } /* * Create and throw an ECMAScript error object based on a code and a message. * * Used when we throw errors internally. ECMAScript generated error objects * are created by ECMAScript code, and the throwing is handled by the bytecode * executor. */ /* #include duk_internal.h -> already included */ /* * Create and throw an error (originating from Duktape internally) * * Push an error object on top of the stack, possibly throw augmenting * the error, and finally longjmp. * * If an error occurs while we're dealing with the current error, we might * enter an infinite recursion loop. This is prevented by detecting a * "double fault" through the heap->creating_error flag; the recursion * then stops at the second level. */ #if defined(DUK_USE_VERBOSE_ERRORS) DUK_INTERNAL void duk_err_create_and_throw(duk_hthread *thr, duk_errcode_t code, const char *msg, const char *filename, duk_int_t line) { #else DUK_INTERNAL void duk_err_create_and_throw(duk_hthread *thr, duk_errcode_t code) { #endif #if defined(DUK_USE_VERBOSE_ERRORS) DUK_DD(DUK_DDPRINT("duk_err_create_and_throw(): code=%ld, msg=%s, filename=%s, line=%ld", (long) code, (const char *) msg, (const char *) filename, (long) line)); #else DUK_DD(DUK_DDPRINT("duk_err_create_and_throw(): code=%ld", (long) code)); #endif DUK_ASSERT(thr != NULL); /* Even though nested call is possible because we throw an error when * trying to create an error, the potential errors must happen before * the longjmp state is configured. */ DUK_ASSERT_LJSTATE_UNSET(thr->heap); /* Sync so that augmentation sees up-to-date activations, NULL * thr->ptr_curr_pc so that it's not used if side effects occur * in augmentation or longjmp handling. */ duk_hthread_sync_and_null_currpc(thr); /* * Create and push an error object onto the top of stack. * The error is potentially augmented before throwing. * * If a "double error" occurs, use a fixed error instance * to avoid further trouble. */ if (thr->heap->creating_error) { duk_tval tv_val; duk_hobject *h_err; thr->heap->creating_error = 0; h_err = thr->builtins[DUK_BIDX_DOUBLE_ERROR]; if (h_err != NULL) { DUK_D(DUK_DPRINT("double fault detected -> use built-in fixed 'double error' instance")); DUK_TVAL_SET_OBJECT(&tv_val, h_err); } else { DUK_D(DUK_DPRINT("double fault detected; there is no built-in fixed 'double error' instance " "-> use the error code as a number")); DUK_TVAL_SET_I32(&tv_val, (duk_int32_t) code); } duk_err_setup_ljstate1(thr, DUK_LJ_TYPE_THROW, &tv_val); /* No augmentation to avoid any allocations or side effects. */ } else { /* Prevent infinite recursion. Extra call stack and C * recursion headroom (see GH-191) is added for augmentation. * That is now signalled by heap->augmenting error and taken * into account in call handling without an explicit limit bump. */ thr->heap->creating_error = 1; duk_require_stack(thr, 1); /* XXX: usually unnecessary '%s' formatting here, but cannot * use 'msg' as a format string directly. */ #if defined(DUK_USE_VERBOSE_ERRORS) duk_push_error_object_raw(thr, code | DUK_ERRCODE_FLAG_NOBLAME_FILELINE, filename, line, "%s", (const char *) msg); #else duk_push_error_object_raw(thr, code | DUK_ERRCODE_FLAG_NOBLAME_FILELINE, NULL, 0, NULL); #endif /* Note that an alloc error may happen during error augmentation. * This may happen both when the original error is an alloc error * and when it's something else. Because any error in augmentation * must be handled correctly anyway, there's no special check for * avoiding it for alloc errors (this differs from Duktape 1.x). */ #if defined(DUK_USE_AUGMENT_ERROR_THROW) DUK_DDD(DUK_DDDPRINT("THROW ERROR (INTERNAL): %!iT (before throw augment)", (duk_tval *) duk_get_tval(thr, -1))); duk_err_augment_error_throw(thr); #endif duk_err_setup_ljstate1(thr, DUK_LJ_TYPE_THROW, DUK_GET_TVAL_NEGIDX(thr, -1)); thr->heap->creating_error = 0; /* Error is now created and we assume no errors can occur any * more. Check for debugger Throw integration only when the * error is complete. If we enter debugger message loop, * creating_error must be 0 so that errors can be thrown in * the paused state, e.g. in Eval commands. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) duk_err_check_debugger_integration(thr); #endif } /* * Finally, longjmp */ DUK_DDD(DUK_DDDPRINT("THROW ERROR (INTERNAL): %!iT, %!iT (after throw augment)", (duk_tval *) &thr->heap->lj.value1, (duk_tval *) &thr->heap->lj.value2)); duk_err_longjmp(thr); DUK_UNREACHABLE(); } /* * Helper for C function call negative return values. */ DUK_INTERNAL void duk_error_throw_from_negative_rc(duk_hthread *thr, duk_ret_t rc) { DUK_ASSERT(thr != NULL); DUK_ASSERT(rc < 0); /* * The __FILE__ and __LINE__ information is intentionally not used in the * creation of the error object, as it isn't useful in the tracedata. The * tracedata still contains the function which returned the negative return * code, and having the file/line of this function isn't very useful. * * The error messages for DUK_RET_xxx shorthand are intentionally very * minimal: they're only really useful for low memory targets. */ duk_error_raw(thr, -rc, NULL, 0, "error (rc %ld)", (long) rc); DUK_WO_NORETURN(return;); } /* * duk_hbuffer allocation and freeing. */ /* #include duk_internal.h -> already included */ /* Allocate a new duk_hbuffer of a certain type and return a pointer to it * (NULL on error). Write buffer data pointer to 'out_bufdata' (only if * allocation successful). */ DUK_INTERNAL duk_hbuffer *duk_hbuffer_alloc(duk_heap *heap, duk_size_t size, duk_small_uint_t flags, void **out_bufdata) { duk_hbuffer *res = NULL; duk_size_t header_size; duk_size_t alloc_size; DUK_ASSERT(heap != NULL); DUK_ASSERT(out_bufdata != NULL); DUK_DDD(DUK_DDDPRINT("allocate hbuffer")); /* Size sanity check. Should not be necessary because caller is * required to check this, but we don't want to cause a segfault * if the size wraps either in duk_size_t computation or when * storing the size in a 16-bit field. */ if (size > DUK_HBUFFER_MAX_BYTELEN) { DUK_D(DUK_DPRINT("hbuffer alloc failed: size too large: %ld", (long) size)); return NULL; /* no need to write 'out_bufdata' */ } if (flags & DUK_BUF_FLAG_EXTERNAL) { header_size = sizeof(duk_hbuffer_external); alloc_size = sizeof(duk_hbuffer_external); } else if (flags & DUK_BUF_FLAG_DYNAMIC) { header_size = sizeof(duk_hbuffer_dynamic); alloc_size = sizeof(duk_hbuffer_dynamic); } else { header_size = sizeof(duk_hbuffer_fixed); alloc_size = sizeof(duk_hbuffer_fixed) + size; DUK_ASSERT(alloc_size >= sizeof(duk_hbuffer_fixed)); /* no wrapping */ } res = (duk_hbuffer *) DUK_ALLOC(heap, alloc_size); if (DUK_UNLIKELY(res == NULL)) { goto alloc_error; } /* zero everything unless requested not to do so */ #if defined(DUK_USE_ZERO_BUFFER_DATA) duk_memzero((void *) res, (flags & DUK_BUF_FLAG_NOZERO) ? header_size : alloc_size); #else duk_memzero((void *) res, header_size); #endif if (flags & DUK_BUF_FLAG_EXTERNAL) { duk_hbuffer_external *h; h = (duk_hbuffer_external *) res; DUK_UNREF(h); *out_bufdata = NULL; #if defined(DUK_USE_EXPLICIT_NULL_INIT) #if defined(DUK_USE_HEAPPTR16) /* the compressed pointer is zeroed which maps to NULL, so nothing to do. */ #else DUK_HBUFFER_EXTERNAL_SET_DATA_PTR(heap, h, NULL); #endif #endif DUK_ASSERT(DUK_HBUFFER_EXTERNAL_GET_DATA_PTR(heap, h) == NULL); } else if (flags & DUK_BUF_FLAG_DYNAMIC) { duk_hbuffer_dynamic *h = (duk_hbuffer_dynamic *) res; void *ptr; if (size > 0) { DUK_ASSERT(!(flags & DUK_BUF_FLAG_EXTERNAL)); /* alloc external with size zero */ DUK_DDD(DUK_DDDPRINT("dynamic buffer with nonzero size, alloc actual buffer")); #if defined(DUK_USE_ZERO_BUFFER_DATA) ptr = DUK_ALLOC_ZEROED(heap, size); #else ptr = DUK_ALLOC(heap, size); #endif if (DUK_UNLIKELY(ptr == NULL)) { /* Because size > 0, NULL check is correct */ goto alloc_error; } *out_bufdata = ptr; DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(heap, h, ptr); } else { *out_bufdata = NULL; #if defined(DUK_USE_EXPLICIT_NULL_INIT) #if defined(DUK_USE_HEAPPTR16) /* the compressed pointer is zeroed which maps to NULL, so nothing to do. */ #else DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(heap, h, NULL); #endif #endif DUK_ASSERT(DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap, h) == NULL); } } else { *out_bufdata = (void *) ((duk_hbuffer_fixed *) (void *) res + 1); } DUK_HBUFFER_SET_SIZE(res, size); DUK_HEAPHDR_SET_TYPE(&res->hdr, DUK_HTYPE_BUFFER); if (flags & DUK_BUF_FLAG_DYNAMIC) { DUK_HBUFFER_SET_DYNAMIC(res); if (flags & DUK_BUF_FLAG_EXTERNAL) { DUK_HBUFFER_SET_EXTERNAL(res); } } else { DUK_ASSERT(!(flags & DUK_BUF_FLAG_EXTERNAL)); } DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap, &res->hdr); DUK_DDD(DUK_DDDPRINT("allocated hbuffer: %p", (void *) res)); return res; alloc_error: DUK_DD(DUK_DDPRINT("hbuffer allocation failed")); DUK_FREE(heap, res); return NULL; /* no need to write 'out_bufdata' */ } /* For indirect allocs. */ DUK_INTERNAL void *duk_hbuffer_get_dynalloc_ptr(duk_heap *heap, void *ud) { duk_hbuffer_dynamic *buf = (duk_hbuffer_dynamic *) ud; DUK_UNREF(heap); return (void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap, buf); } /* * duk_hbuffer assertion helpers */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL void duk_hbuffer_assert_valid(duk_hbuffer *h) { DUK_ASSERT(h != NULL); } #endif /* DUK_USE_ASSERTIONS */ /* * duk_hbuffer operations such as resizing and inserting/appending data to * a dynamic buffer. */ /* #include duk_internal.h -> already included */ /* * Resizing */ DUK_INTERNAL void duk_hbuffer_resize(duk_hthread *thr, duk_hbuffer_dynamic *buf, duk_size_t new_size) { void *res; duk_size_t prev_size; DUK_ASSERT(thr != NULL); DUK_ASSERT(buf != NULL); DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(buf)); DUK_ASSERT(!DUK_HBUFFER_HAS_EXTERNAL(buf)); /* * Maximum size check */ if (new_size > DUK_HBUFFER_MAX_BYTELEN) { DUK_ERROR_RANGE(thr, "buffer too long"); DUK_WO_NORETURN(return;); } /* * Note: use indirect realloc variant just in case mark-and-sweep * (finalizers) might resize this same buffer during garbage * collection. */ res = DUK_REALLOC_INDIRECT(thr->heap, duk_hbuffer_get_dynalloc_ptr, (void *) buf, new_size); if (DUK_LIKELY(res != NULL || new_size == 0)) { /* 'res' may be NULL if new allocation size is 0. */ DUK_DDD(DUK_DDDPRINT("resized dynamic buffer %p:%ld -> %p:%ld", (void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, buf), (long) DUK_HBUFFER_DYNAMIC_GET_SIZE(buf), (void *) res, (long) new_size)); /* * The entire allocated buffer area, regardless of actual used * size, is kept zeroed in resizes for simplicity. If the buffer * is grown, zero the new part. */ prev_size = DUK_HBUFFER_DYNAMIC_GET_SIZE(buf); if (new_size > prev_size) { DUK_ASSERT(new_size - prev_size > 0); #if defined(DUK_USE_ZERO_BUFFER_DATA) duk_memzero((void *) ((char *) res + prev_size), (duk_size_t) (new_size - prev_size)); #endif } DUK_HBUFFER_DYNAMIC_SET_SIZE(buf, new_size); DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(thr->heap, buf, res); } else { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return;); } DUK_ASSERT(res != NULL || new_size == 0); } DUK_INTERNAL void duk_hbuffer_reset(duk_hthread *thr, duk_hbuffer_dynamic *buf) { DUK_ASSERT(thr != NULL); DUK_ASSERT(buf != NULL); DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(buf)); DUK_ASSERT(!DUK_HBUFFER_HAS_EXTERNAL(buf)); duk_hbuffer_resize(thr, buf, 0); } /* #include duk_internal.h -> already included */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_uint_t duk_hbufobj_clamp_bytelength(duk_hbufobj *h_bufobj, duk_uint_t len) { duk_uint_t buf_size; duk_uint_t buf_avail; DUK_ASSERT(h_bufobj != NULL); DUK_ASSERT(h_bufobj->buf != NULL); buf_size = (duk_uint_t) DUK_HBUFFER_GET_SIZE(h_bufobj->buf); if (h_bufobj->offset > buf_size) { /* Slice starting point is beyond current length. */ return 0; } buf_avail = buf_size - h_bufobj->offset; return buf_avail >= len ? len : buf_avail; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * duk_heap allocation and freeing. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_ROM_STRINGS) /* Fixed seed value used with ROM strings. */ #define DUK__FIXED_HASH_SEED 0xabcd1234 #endif /* * Free a heap object. * * Free heap object and its internal (non-heap) pointers. Assumes that * caller has removed the object from heap allocated list or the string * intern table, and any weak references (which strings may have) have * been already dealt with. */ DUK_INTERNAL void duk_free_hobject(duk_heap *heap, duk_hobject *h) { DUK_ASSERT(heap != NULL); DUK_ASSERT(h != NULL); DUK_FREE(heap, DUK_HOBJECT_GET_PROPS(heap, h)); if (DUK_HOBJECT_IS_COMPFUNC(h)) { duk_hcompfunc *f = (duk_hcompfunc *) h; DUK_UNREF(f); /* Currently nothing to free; 'data' is a heap object */ } else if (DUK_HOBJECT_IS_NATFUNC(h)) { duk_hnatfunc *f = (duk_hnatfunc *) h; DUK_UNREF(f); /* Currently nothing to free */ } else if (DUK_HOBJECT_IS_THREAD(h)) { duk_hthread *t = (duk_hthread *) h; duk_activation *act; DUK_FREE(heap, t->valstack); /* Don't free h->resumer because it exists in the heap. * Callstack entries also contain function pointers which * are not freed for the same reason. They are decref * finalized and the targets are freed if necessary based * on their refcount (or reachability). */ for (act = t->callstack_curr; act != NULL;) { duk_activation *act_next; duk_catcher *cat; for (cat = act->cat; cat != NULL;) { duk_catcher *cat_next; cat_next = cat->parent; DUK_FREE(heap, (void *) cat); cat = cat_next; } act_next = act->parent; DUK_FREE(heap, (void *) act); act = act_next; } /* XXX: with 'caller' property the callstack would need * to be unwound to update the 'caller' properties of * functions in the callstack. */ } else if (DUK_HOBJECT_IS_BOUNDFUNC(h)) { duk_hboundfunc *f = (duk_hboundfunc *) (void *) h; DUK_FREE(heap, f->args); } DUK_FREE(heap, (void *) h); } DUK_INTERNAL void duk_free_hbuffer(duk_heap *heap, duk_hbuffer *h) { DUK_ASSERT(heap != NULL); DUK_ASSERT(h != NULL); if (DUK_HBUFFER_HAS_DYNAMIC(h) && !DUK_HBUFFER_HAS_EXTERNAL(h)) { duk_hbuffer_dynamic *g = (duk_hbuffer_dynamic *) h; DUK_DDD(DUK_DDDPRINT("free dynamic buffer %p", (void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap, g))); DUK_FREE(heap, DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap, g)); } DUK_FREE(heap, (void *) h); } DUK_INTERNAL void duk_free_hstring(duk_heap *heap, duk_hstring *h) { DUK_ASSERT(heap != NULL); DUK_ASSERT(h != NULL); DUK_UNREF(heap); DUK_UNREF(h); #if defined(DUK_USE_HSTRING_EXTDATA) && defined(DUK_USE_EXTSTR_FREE) if (DUK_HSTRING_HAS_EXTDATA(h)) { DUK_DDD(DUK_DDDPRINT("free extstr: hstring %!O, extdata: %p", h, DUK_HSTRING_GET_EXTDATA((duk_hstring_external *) h))); DUK_USE_EXTSTR_FREE(heap->heap_udata, (const void *) DUK_HSTRING_GET_EXTDATA((duk_hstring_external *) h)); } #endif DUK_FREE(heap, (void *) h); } DUK_INTERNAL void duk_heap_free_heaphdr_raw(duk_heap *heap, duk_heaphdr *hdr) { DUK_ASSERT(heap); DUK_ASSERT(hdr); DUK_DDD(DUK_DDDPRINT("free heaphdr %p, htype %ld", (void *) hdr, (long) DUK_HEAPHDR_GET_TYPE(hdr))); switch (DUK_HEAPHDR_GET_TYPE(hdr)) { case DUK_HTYPE_STRING: duk_free_hstring(heap, (duk_hstring *) hdr); break; case DUK_HTYPE_OBJECT: duk_free_hobject(heap, (duk_hobject *) hdr); break; default: DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(hdr) == DUK_HTYPE_BUFFER); duk_free_hbuffer(heap, (duk_hbuffer *) hdr); } } /* * Free the heap. * * Frees heap-related non-heap-tracked allocations such as the * string intern table; then frees the heap allocated objects; * and finally frees the heap structure itself. Reference counts * and GC markers are ignored (and not updated) in this process, * and finalizers won't be called. * * The heap pointer and heap object pointers must not be used * after this call. */ #if defined(DUK_USE_CACHE_ACTIVATION) DUK_LOCAL duk_size_t duk__heap_free_activation_freelist(duk_heap *heap) { duk_activation *act; duk_activation *act_next; duk_size_t count_act = 0; for (act = heap->activation_free; act != NULL;) { act_next = act->parent; DUK_FREE(heap, (void *) act); act = act_next; #if defined(DUK_USE_DEBUG) count_act++; #endif } heap->activation_free = NULL; /* needed when called from mark-and-sweep */ return count_act; } #endif /* DUK_USE_CACHE_ACTIVATION */ #if defined(DUK_USE_CACHE_CATCHER) DUK_LOCAL duk_size_t duk__heap_free_catcher_freelist(duk_heap *heap) { duk_catcher *cat; duk_catcher *cat_next; duk_size_t count_cat = 0; for (cat = heap->catcher_free; cat != NULL;) { cat_next = cat->parent; DUK_FREE(heap, (void *) cat); cat = cat_next; #if defined(DUK_USE_DEBUG) count_cat++; #endif } heap->catcher_free = NULL; /* needed when called from mark-and-sweep */ return count_cat; } #endif /* DUK_USE_CACHE_CATCHER */ DUK_INTERNAL void duk_heap_free_freelists(duk_heap *heap) { duk_size_t count_act = 0; duk_size_t count_cat = 0; #if defined(DUK_USE_CACHE_ACTIVATION) count_act = duk__heap_free_activation_freelist(heap); #endif #if defined(DUK_USE_CACHE_CATCHER) count_cat = duk__heap_free_catcher_freelist(heap); #endif DUK_UNREF(heap); DUK_UNREF(count_act); DUK_UNREF(count_cat); DUK_D(DUK_DPRINT("freed %ld activation freelist entries, %ld catcher freelist entries", (long) count_act, (long) count_cat)); } DUK_LOCAL void duk__free_allocated(duk_heap *heap) { duk_heaphdr *curr; duk_heaphdr *next; curr = heap->heap_allocated; while (curr) { /* We don't log or warn about freeing zero refcount objects * because they may happen with finalizer processing. */ DUK_DDD(DUK_DDDPRINT("FINALFREE (allocated): %!iO", (duk_heaphdr *) curr)); next = DUK_HEAPHDR_GET_NEXT(heap, curr); duk_heap_free_heaphdr_raw(heap, curr); curr = next; } } #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_LOCAL void duk__free_finalize_list(duk_heap *heap) { duk_heaphdr *curr; duk_heaphdr *next; curr = heap->finalize_list; while (curr) { DUK_DDD(DUK_DDDPRINT("FINALFREE (finalize_list): %!iO", (duk_heaphdr *) curr)); next = DUK_HEAPHDR_GET_NEXT(heap, curr); duk_heap_free_heaphdr_raw(heap, curr); curr = next; } } #endif /* DUK_USE_FINALIZER_SUPPORT */ DUK_LOCAL void duk__free_stringtable(duk_heap *heap) { /* strings are only tracked by stringtable */ duk_heap_strtable_free(heap); } #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_LOCAL void duk__free_run_finalizers(duk_heap *heap) { duk_heaphdr *curr; duk_uint_t round_no; duk_size_t count_all; duk_size_t count_finalized; duk_size_t curr_limit; DUK_ASSERT(heap != NULL); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(heap->refzero_list == NULL); /* refzero not running -> must be empty */ #endif DUK_ASSERT(heap->finalize_list == NULL); /* mark-and-sweep last pass */ if (heap->heap_thread == NULL) { /* May happen when heap allocation fails right off. There * cannot be any finalizable objects in this case. */ DUK_D(DUK_DPRINT("no heap_thread in heap destruct, assume no finalizable objects")); return; } /* Prevent finalize_list processing and mark-and-sweep entirely. * Setting ms_running != 0 also prevents refzero handling from moving * objects away from the heap_allocated list. The flag name is a bit * misleading here. * * Use a distinct value for ms_running here (== 2) so that assertions * can detect this situation separate from the normal runtime * mark-and-sweep case. This allows better assertions (GH-2030). */ DUK_ASSERT(heap->pf_prevent_count == 0); DUK_ASSERT(heap->ms_running == 0); DUK_ASSERT(heap->ms_prevent_count == 0); heap->pf_prevent_count = 1; heap->ms_running = 2; /* Use distinguishable value. */ heap->ms_prevent_count = 1; /* Bump, because mark-and-sweep assumes it's bumped when ms_running is set. */ curr_limit = 0; /* suppress warning, not used */ for (round_no = 0; ; round_no++) { curr = heap->heap_allocated; count_all = 0; count_finalized = 0; while (curr) { count_all++; if (DUK_HEAPHDR_IS_OBJECT(curr)) { /* Only objects in heap_allocated may have finalizers. Check that * the object itself has a _Finalizer property (own or inherited) * so that we don't execute finalizers for e.g. Proxy objects. */ DUK_ASSERT(curr != NULL); if (DUK_HOBJECT_HAS_FINALIZER_FAST(heap, (duk_hobject *) curr)) { if (!DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) curr)) { DUK_ASSERT(DUK_HEAP_HAS_FINALIZER_NORESCUE(heap)); /* maps to finalizer 2nd argument */ duk_heap_run_finalizer(heap, (duk_hobject *) curr); count_finalized++; } } } curr = DUK_HEAPHDR_GET_NEXT(heap, curr); } /* Each round of finalizer execution may spawn new finalizable objects * which is normal behavior for some applications. Allow multiple * rounds of finalization, but use a shrinking limit based on the * first round to detect the case where a runaway finalizer creates * an unbounded amount of new finalizable objects. Finalizer rescue * is not supported: the semantics are unclear because most of the * objects being finalized here are already reachable. The finalizer * is given a boolean to indicate that rescue is not possible. * * See discussion in: https://github.com/svaarala/duktape/pull/473 */ if (round_no == 0) { /* Cannot wrap: each object is at least 8 bytes so count is * at most 1/8 of that. */ curr_limit = count_all * 2; } else { curr_limit = (curr_limit * 3) / 4; /* Decrease by 25% every round */ } DUK_D(DUK_DPRINT("finalizer round %ld complete, %ld objects, tried to execute %ld finalizers, current limit is %ld", (long) round_no, (long) count_all, (long) count_finalized, (long) curr_limit)); if (count_finalized == 0) { DUK_D(DUK_DPRINT("no more finalizable objects, forced finalization finished")); break; } if (count_finalized >= curr_limit) { DUK_D(DUK_DPRINT("finalizer count above limit, potentially runaway finalizer; skip remaining finalizers")); break; } } DUK_ASSERT(heap->ms_running == 2); DUK_ASSERT(heap->pf_prevent_count == 1); heap->ms_running = 0; heap->pf_prevent_count = 0; } #endif /* DUK_USE_FINALIZER_SUPPORT */ DUK_INTERNAL void duk_heap_free(duk_heap *heap) { DUK_D(DUK_DPRINT("free heap: %p", (void *) heap)); #if defined(DUK_USE_DEBUG) duk_heap_strtable_dump(heap); #endif #if defined(DUK_USE_DEBUGGER_SUPPORT) /* Detach a debugger if attached (can be called multiple times) * safely. */ /* XXX: Add a flag to reject an attempt to re-attach? Otherwise * the detached callback may immediately reattach. */ duk_debug_do_detach(heap); #endif /* Execute finalizers before freeing the heap, even for reachable * objects. This gives finalizers the chance to free any native * resources like file handles, allocations made outside Duktape, * etc. This is quite tricky to get right, so that all finalizer * guarantees are honored. * * Run mark-and-sweep a few times just in case (unreachable object * finalizers run already here). The last round must rescue objects * from the previous round without running any more finalizers. This * ensures rescued objects get their FINALIZED flag cleared so that * their finalizer is called once more in forced finalization to * satisfy finalizer guarantees. However, we don't want to run any * more finalizers because that'd required one more loop, and so on. * * XXX: this perhaps requires an execution time limit. */ DUK_D(DUK_DPRINT("execute finalizers before freeing heap")); DUK_ASSERT(heap->pf_skip_finalizers == 0); DUK_D(DUK_DPRINT("forced gc #1 in heap destruction")); duk_heap_mark_and_sweep(heap, 0); DUK_D(DUK_DPRINT("forced gc #2 in heap destruction")); duk_heap_mark_and_sweep(heap, 0); DUK_D(DUK_DPRINT("forced gc #3 in heap destruction (don't run finalizers)")); heap->pf_skip_finalizers = 1; duk_heap_mark_and_sweep(heap, 0); /* Skip finalizers; queue finalizable objects to heap_allocated. */ /* There are never objects in refzero_list at this point, or at any * point beyond a DECREF (even a DECREF_NORZ). Since Duktape 2.1 * refzero_list processing is side effect free, so it is always * processed to completion by a DECREF initially triggering a zero * refcount. */ #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(heap->refzero_list == NULL); /* Always processed to completion inline. */ #endif #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_ASSERT(heap->finalize_list == NULL); /* Last mark-and-sweep with skip_finalizers. */ #endif #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_D(DUK_DPRINT("run finalizers for remaining finalizable objects")); DUK_HEAP_SET_FINALIZER_NORESCUE(heap); /* Rescue no longer supported. */ duk__free_run_finalizers(heap); #endif /* DUK_USE_FINALIZER_SUPPORT */ /* Note: heap->heap_thread, heap->curr_thread, and heap->heap_object * are on the heap allocated list. */ DUK_D(DUK_DPRINT("freeing temporary freelists")); duk_heap_free_freelists(heap); DUK_D(DUK_DPRINT("freeing heap_allocated of heap: %p", (void *) heap)); duk__free_allocated(heap); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(heap->refzero_list == NULL); /* Always processed to completion inline. */ #endif #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_D(DUK_DPRINT("freeing finalize_list of heap: %p", (void *) heap)); duk__free_finalize_list(heap); #endif DUK_D(DUK_DPRINT("freeing string table of heap: %p", (void *) heap)); duk__free_stringtable(heap); DUK_D(DUK_DPRINT("freeing heap structure: %p", (void *) heap)); heap->free_func(heap->heap_udata, heap); } /* * Allocate a heap. * * String table is initialized with built-in strings from genbuiltins.py, * either by dynamically creating the strings or by referring to ROM strings. */ #if defined(DUK_USE_ROM_STRINGS) DUK_LOCAL duk_bool_t duk__init_heap_strings(duk_heap *heap) { #if defined(DUK_USE_ASSERTIONS) duk_small_uint_t i; #endif DUK_UNREF(heap); /* With ROM-based strings, heap->strs[] and thr->strs[] are omitted * so nothing to initialize for strs[]. */ #if defined(DUK_USE_ASSERTIONS) for (i = 0; i < sizeof(duk_rom_strings_lookup) / sizeof(const duk_hstring *); i++) { const duk_hstring *h; duk_uint32_t hash; h = duk_rom_strings_lookup[i]; while (h != NULL) { hash = duk_heap_hashstring(heap, (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h)); DUK_DD(DUK_DDPRINT("duk_rom_strings_lookup[%d] -> hash 0x%08lx, computed 0x%08lx", (int) i, (unsigned long) DUK_HSTRING_GET_HASH(h), (unsigned long) hash)); DUK_ASSERT(hash == (duk_uint32_t) DUK_HSTRING_GET_HASH(h)); h = (const duk_hstring *) h->hdr.h_next; } } #endif return 1; } #else /* DUK_USE_ROM_STRINGS */ DUK_LOCAL duk_bool_t duk__init_heap_strings(duk_heap *heap) { duk_bitdecoder_ctx bd_ctx; duk_bitdecoder_ctx *bd = &bd_ctx; /* convenience */ duk_small_uint_t i; duk_memzero(&bd_ctx, sizeof(bd_ctx)); bd->data = (const duk_uint8_t *) duk_strings_data; bd->length = (duk_size_t) DUK_STRDATA_DATA_LENGTH; for (i = 0; i < DUK_HEAP_NUM_STRINGS; i++) { duk_uint8_t tmp[DUK_STRDATA_MAX_STRLEN]; duk_small_uint_t len; duk_hstring *h; len = duk_bd_decode_bitpacked_string(bd, tmp); /* No need to length check string: it will never exceed even * the 16-bit length maximum. */ DUK_ASSERT(len <= 0xffffUL); DUK_DDD(DUK_DDDPRINT("intern built-in string %ld", (long) i)); h = duk_heap_strtable_intern(heap, tmp, len); if (!h) { goto failed; } DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) h)); /* Special flags checks. Since these strings are always * reachable and a string cannot appear twice in the string * table, there's no need to check/set these flags elsewhere. * The 'internal' flag is set by string intern code. */ if (i == DUK_STRIDX_EVAL || i == DUK_STRIDX_LC_ARGUMENTS) { DUK_HSTRING_SET_EVAL_OR_ARGUMENTS(h); } if (i >= DUK_STRIDX_START_RESERVED && i < DUK_STRIDX_END_RESERVED) { DUK_HSTRING_SET_RESERVED_WORD(h); if (i >= DUK_STRIDX_START_STRICT_RESERVED) { DUK_HSTRING_SET_STRICT_RESERVED_WORD(h); } } DUK_DDD(DUK_DDDPRINT("interned: %!O", (duk_heaphdr *) h)); /* XXX: The incref macro takes a thread pointer but doesn't * use it right now. */ DUK_HSTRING_INCREF(_never_referenced_, h); #if defined(DUK_USE_HEAPPTR16) heap->strs16[i] = DUK_USE_HEAPPTR_ENC16(heap->heap_udata, (void *) h); #else heap->strs[i] = h; #endif } return 1; failed: return 0; } #endif /* DUK_USE_ROM_STRINGS */ DUK_LOCAL duk_bool_t duk__init_heap_thread(duk_heap *heap) { duk_hthread *thr; DUK_D(DUK_DPRINT("heap init: alloc heap thread")); thr = duk_hthread_alloc_unchecked(heap, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_THREAD)); if (thr == NULL) { DUK_D(DUK_DPRINT("failed to alloc heap_thread")); return 0; } thr->state = DUK_HTHREAD_STATE_INACTIVE; #if defined(DUK_USE_ROM_STRINGS) /* No strs[] pointer. */ #else /* DUK_USE_ROM_STRINGS */ #if defined(DUK_USE_HEAPPTR16) thr->strs16 = heap->strs16; #else thr->strs = heap->strs; #endif #endif /* DUK_USE_ROM_STRINGS */ heap->heap_thread = thr; DUK_HTHREAD_INCREF(thr, thr); /* Note: first argument not really used */ /* 'thr' is now reachable */ DUK_D(DUK_DPRINT("heap init: init heap thread stacks")); if (!duk_hthread_init_stacks(heap, thr)) { return 0; } /* XXX: this may now fail, and is not handled correctly */ duk_hthread_create_builtin_objects(thr); /* default prototype */ DUK_HOBJECT_SET_PROTOTYPE_INIT_INCREF(thr, (duk_hobject *) thr, thr->builtins[DUK_BIDX_THREAD_PROTOTYPE]); return 1; } #if defined(DUK_USE_DEBUG) #define DUK__DUMPSZ(t) do { \ DUK_D(DUK_DPRINT("" #t "=%ld", (long) sizeof(t))); \ } while (0) /* These is not 100% because format would need to be non-portable "long long". * Also print out as doubles to catch cases where the "long" type is not wide * enough; the limits will then not be printed accurately but the magnitude * will be correct. */ #define DUK__DUMPLM_SIGNED_RAW(t,a,b) do { \ DUK_D(DUK_DPRINT(t "=[%ld,%ld]=[%lf,%lf]", \ (long) (a), (long) (b), \ (double) (a), (double) (b))); \ } while (0) #define DUK__DUMPLM_UNSIGNED_RAW(t,a,b) do { \ DUK_D(DUK_DPRINT(t "=[%lu,%lu]=[%lf,%lf]", \ (unsigned long) (a), (unsigned long) (b), \ (double) (a), (double) (b))); \ } while (0) #define DUK__DUMPLM_SIGNED(t) do { \ DUK__DUMPLM_SIGNED_RAW("DUK_" #t "_{MIN,MAX}", DUK_##t##_MIN, DUK_##t##_MAX); \ } while (0) #define DUK__DUMPLM_UNSIGNED(t) do { \ DUK__DUMPLM_UNSIGNED_RAW("DUK_" #t "_{MIN,MAX}", DUK_##t##_MIN, DUK_##t##_MAX); \ } while (0) DUK_LOCAL void duk__dump_type_sizes(void) { DUK_D(DUK_DPRINT("sizeof()")); /* basic platform types */ DUK__DUMPSZ(char); DUK__DUMPSZ(short); DUK__DUMPSZ(int); DUK__DUMPSZ(long); DUK__DUMPSZ(double); DUK__DUMPSZ(void *); DUK__DUMPSZ(size_t); /* basic types from duk_features.h */ DUK__DUMPSZ(duk_uint8_t); DUK__DUMPSZ(duk_int8_t); DUK__DUMPSZ(duk_uint16_t); DUK__DUMPSZ(duk_int16_t); DUK__DUMPSZ(duk_uint32_t); DUK__DUMPSZ(duk_int32_t); DUK__DUMPSZ(duk_uint64_t); DUK__DUMPSZ(duk_int64_t); DUK__DUMPSZ(duk_uint_least8_t); DUK__DUMPSZ(duk_int_least8_t); DUK__DUMPSZ(duk_uint_least16_t); DUK__DUMPSZ(duk_int_least16_t); DUK__DUMPSZ(duk_uint_least32_t); DUK__DUMPSZ(duk_int_least32_t); #if defined(DUK_USE_64BIT_OPS) DUK__DUMPSZ(duk_uint_least64_t); DUK__DUMPSZ(duk_int_least64_t); #endif DUK__DUMPSZ(duk_uint_fast8_t); DUK__DUMPSZ(duk_int_fast8_t); DUK__DUMPSZ(duk_uint_fast16_t); DUK__DUMPSZ(duk_int_fast16_t); DUK__DUMPSZ(duk_uint_fast32_t); DUK__DUMPSZ(duk_int_fast32_t); #if defined(DUK_USE_64BIT_OPS) DUK__DUMPSZ(duk_uint_fast64_t); DUK__DUMPSZ(duk_int_fast64_t); #endif DUK__DUMPSZ(duk_uintptr_t); DUK__DUMPSZ(duk_intptr_t); DUK__DUMPSZ(duk_uintmax_t); DUK__DUMPSZ(duk_intmax_t); DUK__DUMPSZ(duk_double_t); /* important chosen base types */ DUK__DUMPSZ(duk_int_t); DUK__DUMPSZ(duk_uint_t); DUK__DUMPSZ(duk_int_fast_t); DUK__DUMPSZ(duk_uint_fast_t); DUK__DUMPSZ(duk_small_int_t); DUK__DUMPSZ(duk_small_uint_t); DUK__DUMPSZ(duk_small_int_fast_t); DUK__DUMPSZ(duk_small_uint_fast_t); /* some derived types */ DUK__DUMPSZ(duk_codepoint_t); DUK__DUMPSZ(duk_ucodepoint_t); DUK__DUMPSZ(duk_idx_t); DUK__DUMPSZ(duk_errcode_t); DUK__DUMPSZ(duk_uarridx_t); /* tval */ DUK__DUMPSZ(duk_double_union); DUK__DUMPSZ(duk_tval); /* structs from duk_forwdecl.h */ DUK__DUMPSZ(duk_jmpbuf); /* just one 'int' for C++ exceptions */ DUK__DUMPSZ(duk_heaphdr); DUK__DUMPSZ(duk_heaphdr_string); DUK__DUMPSZ(duk_hstring); DUK__DUMPSZ(duk_hstring_external); DUK__DUMPSZ(duk_hobject); DUK__DUMPSZ(duk_harray); DUK__DUMPSZ(duk_hcompfunc); DUK__DUMPSZ(duk_hnatfunc); DUK__DUMPSZ(duk_hdecenv); DUK__DUMPSZ(duk_hobjenv); DUK__DUMPSZ(duk_hthread); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK__DUMPSZ(duk_hbufobj); #endif DUK__DUMPSZ(duk_hproxy); DUK__DUMPSZ(duk_hbuffer); DUK__DUMPSZ(duk_hbuffer_fixed); DUK__DUMPSZ(duk_hbuffer_dynamic); DUK__DUMPSZ(duk_hbuffer_external); DUK__DUMPSZ(duk_propaccessor); DUK__DUMPSZ(duk_propvalue); DUK__DUMPSZ(duk_propdesc); DUK__DUMPSZ(duk_heap); DUK__DUMPSZ(duk_activation); DUK__DUMPSZ(duk_catcher); DUK__DUMPSZ(duk_strcache_entry); DUK__DUMPSZ(duk_litcache_entry); DUK__DUMPSZ(duk_ljstate); DUK__DUMPSZ(duk_fixedbuffer); DUK__DUMPSZ(duk_bitdecoder_ctx); DUK__DUMPSZ(duk_bitencoder_ctx); DUK__DUMPSZ(duk_token); DUK__DUMPSZ(duk_re_token); DUK__DUMPSZ(duk_lexer_point); DUK__DUMPSZ(duk_lexer_ctx); DUK__DUMPSZ(duk_compiler_instr); DUK__DUMPSZ(duk_compiler_func); DUK__DUMPSZ(duk_compiler_ctx); DUK__DUMPSZ(duk_re_matcher_ctx); DUK__DUMPSZ(duk_re_compiler_ctx); } DUK_LOCAL void duk__dump_type_limits(void) { DUK_D(DUK_DPRINT("limits")); /* basic types */ DUK__DUMPLM_SIGNED(INT8); DUK__DUMPLM_UNSIGNED(UINT8); DUK__DUMPLM_SIGNED(INT_FAST8); DUK__DUMPLM_UNSIGNED(UINT_FAST8); DUK__DUMPLM_SIGNED(INT_LEAST8); DUK__DUMPLM_UNSIGNED(UINT_LEAST8); DUK__DUMPLM_SIGNED(INT16); DUK__DUMPLM_UNSIGNED(UINT16); DUK__DUMPLM_SIGNED(INT_FAST16); DUK__DUMPLM_UNSIGNED(UINT_FAST16); DUK__DUMPLM_SIGNED(INT_LEAST16); DUK__DUMPLM_UNSIGNED(UINT_LEAST16); DUK__DUMPLM_SIGNED(INT32); DUK__DUMPLM_UNSIGNED(UINT32); DUK__DUMPLM_SIGNED(INT_FAST32); DUK__DUMPLM_UNSIGNED(UINT_FAST32); DUK__DUMPLM_SIGNED(INT_LEAST32); DUK__DUMPLM_UNSIGNED(UINT_LEAST32); #if defined(DUK_USE_64BIT_OPS) DUK__DUMPLM_SIGNED(INT64); DUK__DUMPLM_UNSIGNED(UINT64); DUK__DUMPLM_SIGNED(INT_FAST64); DUK__DUMPLM_UNSIGNED(UINT_FAST64); DUK__DUMPLM_SIGNED(INT_LEAST64); DUK__DUMPLM_UNSIGNED(UINT_LEAST64); #endif DUK__DUMPLM_SIGNED(INTPTR); DUK__DUMPLM_UNSIGNED(UINTPTR); DUK__DUMPLM_SIGNED(INTMAX); DUK__DUMPLM_UNSIGNED(UINTMAX); /* derived types */ DUK__DUMPLM_SIGNED(INT); DUK__DUMPLM_UNSIGNED(UINT); DUK__DUMPLM_SIGNED(INT_FAST); DUK__DUMPLM_UNSIGNED(UINT_FAST); DUK__DUMPLM_SIGNED(SMALL_INT); DUK__DUMPLM_UNSIGNED(SMALL_UINT); DUK__DUMPLM_SIGNED(SMALL_INT_FAST); DUK__DUMPLM_UNSIGNED(SMALL_UINT_FAST); } DUK_LOCAL void duk__dump_misc_options(void) { DUK_D(DUK_DPRINT("DUK_VERSION: %ld", (long) DUK_VERSION)); DUK_D(DUK_DPRINT("DUK_GIT_DESCRIBE: %s", DUK_GIT_DESCRIBE)); DUK_D(DUK_DPRINT("OS string: %s", DUK_USE_OS_STRING)); DUK_D(DUK_DPRINT("architecture string: %s", DUK_USE_ARCH_STRING)); DUK_D(DUK_DPRINT("compiler string: %s", DUK_USE_COMPILER_STRING)); DUK_D(DUK_DPRINT("debug level: %ld", (long) DUK_USE_DEBUG_LEVEL)); #if defined(DUK_USE_PACKED_TVAL) DUK_D(DUK_DPRINT("DUK_USE_PACKED_TVAL: yes")); #else DUK_D(DUK_DPRINT("DUK_USE_PACKED_TVAL: no")); #endif #if defined(DUK_USE_VARIADIC_MACROS) DUK_D(DUK_DPRINT("DUK_USE_VARIADIC_MACROS: yes")); #else DUK_D(DUK_DPRINT("DUK_USE_VARIADIC_MACROS: no")); #endif #if defined(DUK_USE_INTEGER_LE) DUK_D(DUK_DPRINT("integer endianness: little")); #elif defined(DUK_USE_INTEGER_ME) DUK_D(DUK_DPRINT("integer endianness: mixed")); #elif defined(DUK_USE_INTEGER_BE) DUK_D(DUK_DPRINT("integer endianness: big")); #else DUK_D(DUK_DPRINT("integer endianness: ???")); #endif #if defined(DUK_USE_DOUBLE_LE) DUK_D(DUK_DPRINT("IEEE double endianness: little")); #elif defined(DUK_USE_DOUBLE_ME) DUK_D(DUK_DPRINT("IEEE double endianness: mixed")); #elif defined(DUK_USE_DOUBLE_BE) DUK_D(DUK_DPRINT("IEEE double endianness: big")); #else DUK_D(DUK_DPRINT("IEEE double endianness: ???")); #endif } #endif /* DUK_USE_DEBUG */ DUK_INTERNAL duk_heap *duk_heap_alloc(duk_alloc_function alloc_func, duk_realloc_function realloc_func, duk_free_function free_func, void *heap_udata, duk_fatal_function fatal_func) { duk_heap *res = NULL; duk_uint32_t st_initsize; DUK_D(DUK_DPRINT("allocate heap")); /* * Random config sanity asserts */ DUK_ASSERT(DUK_USE_STRTAB_MINSIZE >= 64); DUK_ASSERT((DUK_HTYPE_STRING & 0x01U) == 0); DUK_ASSERT((DUK_HTYPE_BUFFER & 0x01U) == 0); DUK_ASSERT((DUK_HTYPE_OBJECT & 0x01U) == 1); /* DUK_HEAPHDR_IS_OBJECT() relies ont his. */ /* * Debug dump type sizes */ #if defined(DUK_USE_DEBUG) duk__dump_misc_options(); duk__dump_type_sizes(); duk__dump_type_limits(); #endif /* * If selftests enabled, run them as early as possible. */ #if defined(DUK_USE_SELF_TESTS) DUK_D(DUK_DPRINT("run self tests")); if (duk_selftest_run_tests(alloc_func, realloc_func, free_func, heap_udata) > 0) { fatal_func(heap_udata, "self test(s) failed"); } DUK_D(DUK_DPRINT("self tests passed")); #endif /* * Important assert-like checks that should be enabled even * when assertions are otherwise not enabled. */ #if defined(DUK_USE_EXEC_REGCONST_OPTIMIZE) /* Can't check sizeof() using preprocessor so explicit check. * This will be optimized away in practice; unfortunately a * warning is generated on some compilers as a result. */ #if defined(DUK_USE_PACKED_TVAL) if (sizeof(duk_tval) != 8) { #else if (sizeof(duk_tval) != 16) { #endif fatal_func(heap_udata, "sizeof(duk_tval) not 8 or 16, cannot use DUK_USE_EXEC_REGCONST_OPTIMIZE option"); } #endif /* DUK_USE_EXEC_REGCONST_OPTIMIZE */ /* * Computed values (e.g. INFINITY) */ #if defined(DUK_USE_COMPUTED_NAN) do { /* Workaround for some exotic platforms where NAN is missing * and the expression (0.0 / 0.0) does NOT result in a NaN. * Such platforms use the global 'duk_computed_nan' which must * be initialized at runtime. Use 'volatile' to ensure that * the compiler will actually do the computation and not try * to do constant folding which might result in the original * problem. */ volatile double dbl1 = 0.0; volatile double dbl2 = 0.0; duk_computed_nan = dbl1 / dbl2; } while (0); #endif #if defined(DUK_USE_COMPUTED_INFINITY) do { /* Similar workaround for INFINITY. */ volatile double dbl1 = 1.0; volatile double dbl2 = 0.0; duk_computed_infinity = dbl1 / dbl2; } while (0); #endif /* * Allocate heap struct * * Use a raw call, all macros expect the heap to be initialized */ #if defined(DUK_USE_INJECT_HEAP_ALLOC_ERROR) && (DUK_USE_INJECT_HEAP_ALLOC_ERROR == 1) goto failed; #endif DUK_D(DUK_DPRINT("alloc duk_heap object")); res = (duk_heap *) alloc_func(heap_udata, sizeof(duk_heap)); if (!res) { goto failed; } /* * Zero the struct, and start initializing roughly in order */ duk_memzero(res, sizeof(*res)); #if defined(DUK_USE_ASSERTIONS) res->heap_initializing = 1; #endif /* explicit NULL inits */ #if defined(DUK_USE_EXPLICIT_NULL_INIT) res->heap_udata = NULL; res->heap_allocated = NULL; #if defined(DUK_USE_REFERENCE_COUNTING) res->refzero_list = NULL; #endif #if defined(DUK_USE_FINALIZER_SUPPORT) res->finalize_list = NULL; #if defined(DUK_USE_ASSERTIONS) res->currently_finalizing = NULL; #endif #endif #if defined(DUK_USE_CACHE_ACTIVATION) res->activation_free = NULL; #endif #if defined(DUK_USE_CACHE_CATCHER) res->catcher_free = NULL; #endif res->heap_thread = NULL; res->curr_thread = NULL; res->heap_object = NULL; #if defined(DUK_USE_STRTAB_PTRCOMP) res->strtable16 = NULL; #else res->strtable = NULL; #endif #if defined(DUK_USE_ROM_STRINGS) /* no res->strs[] */ #else /* DUK_USE_ROM_STRINGS */ #if defined(DUK_USE_HEAPPTR16) /* res->strs16[] is zeroed and zero decodes to NULL, so no NULL inits. */ #else { duk_small_uint_t i; for (i = 0; i < DUK_HEAP_NUM_STRINGS; i++) { res->strs[i] = NULL; } } #endif #endif /* DUK_USE_ROM_STRINGS */ #if defined(DUK_USE_DEBUGGER_SUPPORT) res->dbg_read_cb = NULL; res->dbg_write_cb = NULL; res->dbg_peek_cb = NULL; res->dbg_read_flush_cb = NULL; res->dbg_write_flush_cb = NULL; res->dbg_request_cb = NULL; res->dbg_udata = NULL; res->dbg_pause_act = NULL; #endif #endif /* DUK_USE_EXPLICIT_NULL_INIT */ res->alloc_func = alloc_func; res->realloc_func = realloc_func; res->free_func = free_func; res->heap_udata = heap_udata; res->fatal_func = fatal_func; /* XXX: for now there's a pointer packing zero assumption, i.e. * NULL <=> compressed pointer 0. If this is removed, may need * to precompute e.g. null16 here. */ /* res->ms_trigger_counter == 0 -> now causes immediate GC; which is OK */ /* Prevent mark-and-sweep and finalizer execution until heap is completely * initialized. */ DUK_ASSERT(res->ms_prevent_count == 0); DUK_ASSERT(res->pf_prevent_count == 0); res->ms_prevent_count = 1; res->pf_prevent_count = 1; DUK_ASSERT(res->ms_running == 0); res->call_recursion_depth = 0; res->call_recursion_limit = DUK_USE_NATIVE_CALL_RECLIMIT; /* XXX: use the pointer as a seed for now: mix in time at least */ /* The casts through duk_uintptr_t is to avoid the following GCC warning: * * warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] * * This still generates a /Wp64 warning on VS2010 when compiling for x86. */ #if defined(DUK_USE_ROM_STRINGS) /* XXX: make a common DUK_USE_ option, and allow custom fixed seed? */ DUK_D(DUK_DPRINT("using rom strings, force heap hash_seed to fixed value 0x%08lx", (long) DUK__FIXED_HASH_SEED)); res->hash_seed = (duk_uint32_t) DUK__FIXED_HASH_SEED; #else /* DUK_USE_ROM_STRINGS */ res->hash_seed = (duk_uint32_t) (duk_uintptr_t) res; #if !defined(DUK_USE_STRHASH_DENSE) res->hash_seed ^= 5381; /* Bernstein hash init value is normally 5381; XOR it in in case pointer low bits are 0 */ #endif #endif /* DUK_USE_ROM_STRINGS */ #if defined(DUK_USE_EXPLICIT_NULL_INIT) res->lj.jmpbuf_ptr = NULL; #endif DUK_ASSERT(res->lj.type == DUK_LJ_TYPE_UNKNOWN); /* zero */ DUK_ASSERT(res->lj.iserror == 0); DUK_TVAL_SET_UNDEFINED(&res->lj.value1); DUK_TVAL_SET_UNDEFINED(&res->lj.value2); DUK_ASSERT_LJSTATE_UNSET(res); /* * Init stringtable: fixed variant */ st_initsize = DUK_USE_STRTAB_MINSIZE; #if defined(DUK_USE_STRTAB_PTRCOMP) res->strtable16 = (duk_uint16_t *) alloc_func(heap_udata, sizeof(duk_uint16_t) * st_initsize); if (res->strtable16 == NULL) { goto failed; } #else res->strtable = (duk_hstring **) alloc_func(heap_udata, sizeof(duk_hstring *) * st_initsize); if (res->strtable == NULL) { goto failed; } #endif res->st_size = st_initsize; res->st_mask = st_initsize - 1; #if (DUK_USE_STRTAB_MINSIZE != DUK_USE_STRTAB_MAXSIZE) DUK_ASSERT(res->st_count == 0); #endif #if defined(DUK_USE_STRTAB_PTRCOMP) /* zero assumption */ duk_memzero(res->strtable16, sizeof(duk_uint16_t) * st_initsize); #else #if defined(DUK_USE_EXPLICIT_NULL_INIT) { duk_uint32_t i; for (i = 0; i < st_initsize; i++) { res->strtable[i] = NULL; } } #else duk_memzero(res->strtable, sizeof(duk_hstring *) * st_initsize); #endif /* DUK_USE_EXPLICIT_NULL_INIT */ #endif /* DUK_USE_STRTAB_PTRCOMP */ /* * Init stringcache */ #if defined(DUK_USE_EXPLICIT_NULL_INIT) { duk_uint_t i; for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) { res->strcache[i].h = NULL; } } #endif /* * Init litcache */ #if defined(DUK_USE_LITCACHE_SIZE) DUK_ASSERT(DUK_USE_LITCACHE_SIZE > 0); DUK_ASSERT(DUK_IS_POWER_OF_TWO((duk_uint_t) DUK_USE_LITCACHE_SIZE)); #if defined(DUK_USE_EXPLICIT_NULL_INIT) { duk_uint_t i; for (i = 0; i < DUK_USE_LITCACHE_SIZE; i++) { res->litcache[i].addr = NULL; res->litcache[i].h = NULL; } } #endif #endif /* DUK_USE_LITCACHE_SIZE */ /* XXX: error handling is incomplete. It would be cleanest if * there was a setjmp catchpoint, so that all init code could * freely throw errors. If that were the case, the return code * passing here could be removed. */ /* * Init built-in strings */ #if defined(DUK_USE_INJECT_HEAP_ALLOC_ERROR) && (DUK_USE_INJECT_HEAP_ALLOC_ERROR == 2) goto failed; #endif DUK_D(DUK_DPRINT("heap init: initialize heap strings")); if (!duk__init_heap_strings(res)) { goto failed; } /* * Init the heap thread */ #if defined(DUK_USE_INJECT_HEAP_ALLOC_ERROR) && (DUK_USE_INJECT_HEAP_ALLOC_ERROR == 3) goto failed; #endif DUK_D(DUK_DPRINT("heap init: initialize heap thread")); if (!duk__init_heap_thread(res)) { goto failed; } /* * Init the heap object */ #if defined(DUK_USE_INJECT_HEAP_ALLOC_ERROR) && (DUK_USE_INJECT_HEAP_ALLOC_ERROR == 4) goto failed; #endif DUK_D(DUK_DPRINT("heap init: initialize heap object")); DUK_ASSERT(res->heap_thread != NULL); res->heap_object = duk_hobject_alloc_unchecked(res, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT)); if (res->heap_object == NULL) { goto failed; } DUK_HOBJECT_INCREF(res->heap_thread, res->heap_object); /* * Odds and ends depending on the heap thread */ #if !defined(DUK_USE_GET_RANDOM_DOUBLE) #if defined(DUK_USE_PREFER_SIZE) || !defined(DUK_USE_64BIT_OPS) res->rnd_state = (duk_uint32_t) duk_time_get_ecmascript_time(res->heap_thread); duk_util_tinyrandom_prepare_seed(res->heap_thread); #else res->rnd_state[0] = (duk_uint64_t) duk_time_get_ecmascript_time(res->heap_thread); DUK_ASSERT(res->rnd_state[1] == 0); /* Not filled here, filled in by seed preparation. */ #if 0 /* Manual test values matching misc/xoroshiro128plus_test.c. */ res->rnd_state[0] = DUK_U64_CONSTANT(0xdeadbeef12345678); res->rnd_state[1] = DUK_U64_CONSTANT(0xcafed00d12345678); #endif duk_util_tinyrandom_prepare_seed(res->heap_thread); /* Mix in heap pointer: this ensures that if two Duktape heaps are * created on the same millisecond, they get a different PRNG * sequence (unless e.g. virtual memory addresses cause also the * heap object pointer to be the same). */ { duk_uint64_t tmp_u64; tmp_u64 = 0; duk_memcpy((void *) &tmp_u64, (const void *) &res, (size_t) (sizeof(void *) >= sizeof(duk_uint64_t) ? sizeof(duk_uint64_t) : sizeof(void *))); res->rnd_state[1] ^= tmp_u64; } do { duk_small_uint_t i; for (i = 0; i < 10; i++) { /* Throw away a few initial random numbers just in * case. Probably unnecessary due to SplitMix64 * preparation. */ (void) duk_util_tinyrandom_get_double(res->heap_thread); } } while (0); #endif #endif /* * Allow finalizer and mark-and-sweep processing. */ DUK_D(DUK_DPRINT("heap init: allow finalizer/mark-and-sweep processing")); DUK_ASSERT(res->ms_prevent_count == 1); DUK_ASSERT(res->pf_prevent_count == 1); res->ms_prevent_count = 0; res->pf_prevent_count = 0; DUK_ASSERT(res->ms_running == 0); #if defined(DUK_USE_ASSERTIONS) res->heap_initializing = 0; #endif /* * All done. */ DUK_D(DUK_DPRINT("allocated heap: %p", (void *) res)); return res; failed: DUK_D(DUK_DPRINT("heap allocation failed")); if (res != NULL) { /* Assumes that allocated pointers and alloc funcs are valid * if res exists. */ DUK_ASSERT(res->ms_prevent_count == 1); DUK_ASSERT(res->pf_prevent_count == 1); DUK_ASSERT(res->ms_running == 0); if (res->heap_thread != NULL) { res->ms_prevent_count = 0; res->pf_prevent_count = 0; } #if defined(DUK_USE_ASSERTIONS) res->heap_initializing = 0; #endif DUK_ASSERT(res->alloc_func != NULL); DUK_ASSERT(res->realloc_func != NULL); DUK_ASSERT(res->free_func != NULL); duk_heap_free(res); } return NULL; } /* automatic undefs */ #undef DUK__DUMPLM_SIGNED #undef DUK__DUMPLM_SIGNED_RAW #undef DUK__DUMPLM_UNSIGNED #undef DUK__DUMPLM_UNSIGNED_RAW #undef DUK__DUMPSZ #undef DUK__FIXED_HASH_SEED /* * Finalizer handling. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_FINALIZER_SUPPORT) /* * Fake torture finalizer. */ #if defined(DUK_USE_FINALIZER_TORTURE) DUK_LOCAL duk_ret_t duk__fake_global_finalizer(duk_hthread *thr) { DUK_DD(DUK_DDPRINT("fake global torture finalizer executed")); /* Require a lot of stack to force a value stack grow/shrink. */ duk_require_stack(thr, 100000); /* Force a reallocation with pointer change for value stack * to maximize side effects. */ duk_hthread_valstack_torture_realloc(thr); /* Inner function call, error throw. */ duk_eval_string_noresult(thr, "(function dummy() {\n" " dummy.prototype = null; /* break reference loop */\n" " try {\n" " throw 'fake-finalizer-dummy-error';\n" " } catch (e) {\n" " void e;\n" " }\n" "})()"); /* The above creates garbage (e.g. a function instance). Because * the function/prototype reference loop is broken, it gets collected * immediately by DECREF. If Function.prototype has a _Finalizer * property (happens in some test cases), the garbage gets queued to * finalize_list. This still won't cause an infinite loop because * the torture finalizer is called once per finalize_list run and * the garbage gets handled in the same run. (If the garbage needs * mark-and-sweep collection, an infinite loop might ensue.) */ return 0; } DUK_LOCAL void duk__run_global_torture_finalizer(duk_hthread *thr) { DUK_ASSERT(thr != NULL); /* Avoid fake finalization when callstack limit is near. Otherwise * a callstack limit error will be created, then refzero'ed. The * +5 headroom is conservative. */ if (thr->heap->call_recursion_depth + 5 >= thr->heap->call_recursion_limit || thr->callstack_top + 5 >= DUK_USE_CALLSTACK_LIMIT) { DUK_D(DUK_DPRINT("skip global torture finalizer, too little headroom for call recursion or call stack size")); return; } /* Run fake finalizer. Avoid creating unnecessary garbage. */ duk_push_c_function(thr, duk__fake_global_finalizer, 0 /*nargs*/); (void) duk_pcall(thr, 0 /*nargs*/); duk_pop(thr); } #endif /* DUK_USE_FINALIZER_TORTURE */ /* * Process the finalize_list to completion. * * An object may be placed on finalize_list by either refcounting or * mark-and-sweep. The refcount of objects placed by refcounting will be * zero; the refcount of objects placed by mark-and-sweep is > 0. In both * cases the refcount is bumped by 1 artificially so that a REFZERO event * can never happen while an object is waiting for finalization. Without * this bump a REFZERO could now happen because user code may call * duk_push_heapptr() and then pop a value even when it's on finalize_list. * * List processing assumes refcounts are kept up-to-date at all times, so * that once the finalizer returns, a zero refcount is a reliable reason to * free the object immediately rather than place it back to the heap. This * is the case because we run outside of refzero_list processing so that * DECREF cascades are handled fully inline. * * For mark-and-sweep queued objects (had_zero_refcount false) the object * may be freed immediately if its refcount is zero after the finalizer call * (i.e. finalizer removed the reference loop for the object). If not, the * next mark-and-sweep will collect the object unless it has become reachable * (i.e. rescued) by that time and its refcount hasn't fallen to zero before * that. Mark-and-sweep detects these objects because their FINALIZED flag * is set. * * There's an inherent limitation for mark-and-sweep finalizer rescuing: an * object won't get refinalized if (1) it's rescued, but (2) becomes * unreachable before mark-and-sweep has had time to notice it. The next * mark-and-sweep round simply doesn't have any information of whether the * object has been unreachable the whole time or not (the only way to get * that information would be a mark-and-sweep pass for *every finalized * object*). This is awkward for the application because the mark-and-sweep * round is not generally visible or under full application control. * * For refcount queued objects (had_zero_refcount true) the object is either * immediately freed or rescued, and waiting for a mark-and-sweep round is not * necessary (or desirable); FINALIZED is cleared when a rescued object is * queued back to heap_allocated. The object is eligible for finalization * again (either via refcounting or mark-and-sweep) immediately after being * rescued. If a refcount finalized object is placed into an unreachable * reference loop by its finalizer, it will get collected by mark-and-sweep * and currently the finalizer will execute again. * * There's a special case where: * * - Mark-and-sweep queues an object to finalize_list for finalization. * - The finalizer is executed, FINALIZED is set, and object is queued * back to heap_allocated, waiting for a new mark-and-sweep round. * - The object's refcount drops to zero before mark-and-sweep has a * chance to run another round and make a rescue/free decision. * * This is now handled by refzero code: if an object has a finalizer but * FINALIZED is already set, the object is freed without finalizer processing. * The outcome is the same as if mark-and-sweep was executed at that point; * mark-and-sweep would also free the object without another finalizer run. * This could also be changed so that the refzero-triggered finalizer *IS* * executed: being refzero collected implies someone has operated on the * object so it hasn't been totally unreachable the whole time. This would * risk a finalizer loop however. */ DUK_INTERNAL void duk_heap_process_finalize_list(duk_heap *heap) { duk_heaphdr *curr; #if defined(DUK_USE_DEBUG) duk_size_t count = 0; #endif DUK_DDD(DUK_DDDPRINT("duk_heap_process_finalize_list: %p", (void *) heap)); if (heap->pf_prevent_count != 0) { DUK_DDD(DUK_DDDPRINT("skip finalize_list processing: pf_prevent_count != 0")); return; } /* Heap alloc prevents mark-and-sweep before heap_thread is ready. */ DUK_ASSERT(heap != NULL); DUK_ASSERT(heap->heap_thread != NULL); DUK_ASSERT(heap->heap_thread->valstack != NULL); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(heap->refzero_list == NULL); #endif DUK_ASSERT(heap->pf_prevent_count == 0); heap->pf_prevent_count = 1; /* Mark-and-sweep no longer needs to be prevented when running * finalizers: mark-and-sweep skips any rescue decisions if there * are any objects in finalize_list when mark-and-sweep is entered. * This protects finalized objects from incorrect rescue decisions * caused by finalize_list being a reachability root and only * partially processed. Freeing decisions are not postponed. */ /* When finalizer torture is enabled, make a fake finalizer call with * maximum side effects regardless of whether finalize_list is empty. */ #if defined(DUK_USE_FINALIZER_TORTURE) duk__run_global_torture_finalizer(heap->heap_thread); #endif /* Process finalize_list until it becomes empty. There's currently no * protection against a finalizer always creating more garbage. */ while ((curr = heap->finalize_list) != NULL) { #if defined(DUK_USE_REFERENCE_COUNTING) duk_bool_t queue_back; #endif DUK_DD(DUK_DDPRINT("processing finalize_list entry: %p -> %!iO", (void *) curr, curr)); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT); /* Only objects have finalizers. */ DUK_ASSERT(!DUK_HEAPHDR_HAS_REACHABLE(curr)); DUK_ASSERT(!DUK_HEAPHDR_HAS_TEMPROOT(curr)); DUK_ASSERT(DUK_HEAPHDR_HAS_FINALIZABLE(curr)); /* All objects on finalize_list will have this flag (except object being finalized right now). */ DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(curr)); /* Queueing code ensures. */ DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY(curr)); /* ROM objects never get freed (or finalized). */ #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(heap->currently_finalizing == NULL); heap->currently_finalizing = curr; #endif /* Clear FINALIZABLE for object being finalized, so that * duk_push_heapptr() can properly ignore the object. */ DUK_HEAPHDR_CLEAR_FINALIZABLE(curr); if (DUK_LIKELY(!heap->pf_skip_finalizers)) { /* Run the finalizer, duk_heap_run_finalizer() sets * and checks for FINALIZED to prevent the finalizer * from executing multiple times per finalization cycle. * (This safeguard shouldn't be actually needed anymore). */ #if defined(DUK_USE_REFERENCE_COUNTING) duk_bool_t had_zero_refcount; #endif /* The object's refcount is >0 throughout so it won't be * refzero processed prematurely. */ #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(curr) >= 1); had_zero_refcount = (DUK_HEAPHDR_GET_REFCOUNT(curr) == 1); /* Preincremented on finalize_list insert. */ #endif DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(curr)); duk_heap_run_finalizer(heap, (duk_hobject *) curr); /* must never longjmp */ DUK_ASSERT(DUK_HEAPHDR_HAS_FINALIZED(curr)); /* XXX: assert that object is still in finalize_list * when duk_push_heapptr() allows automatic rescue. */ #if defined(DUK_USE_REFERENCE_COUNTING) DUK_DD(DUK_DDPRINT("refcount after finalizer (includes bump): %ld", (long) DUK_HEAPHDR_GET_REFCOUNT(curr))); if (DUK_HEAPHDR_GET_REFCOUNT(curr) == 1) { /* Only artificial bump in refcount? */ #if defined(DUK_USE_DEBUG) if (had_zero_refcount) { DUK_DD(DUK_DDPRINT("finalized object's refcount is zero -> free immediately (refcount queued)")); } else { DUK_DD(DUK_DDPRINT("finalized object's refcount is zero -> free immediately (mark-and-sweep queued)")); } #endif queue_back = 0; } else #endif { #if defined(DUK_USE_REFERENCE_COUNTING) queue_back = 1; if (had_zero_refcount) { /* When finalization is triggered * by refzero and we queue the object * back, clear FINALIZED right away * so that the object can be refinalized * immediately if necessary. */ DUK_HEAPHDR_CLEAR_FINALIZED(curr); } #endif } } else { /* Used during heap destruction: don't actually run finalizers * because we're heading into forced finalization. Instead, * queue finalizable objects back to the heap_allocated list. */ DUK_D(DUK_DPRINT("skip finalizers flag set, queue object to heap_allocated without finalizing")); DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(curr)); #if defined(DUK_USE_REFERENCE_COUNTING) queue_back = 1; #endif } /* Dequeue object from finalize_list. Note that 'curr' may no * longer be finalize_list head because new objects may have * been queued to the list. As a result we can't optimize for * the single-linked heap case and must scan the list for * removal, typically the scan is very short however. */ DUK_HEAP_REMOVE_FROM_FINALIZE_LIST(heap, curr); /* Queue back to heap_allocated or free immediately. */ #if defined(DUK_USE_REFERENCE_COUNTING) if (queue_back) { /* FINALIZED is only cleared if object originally * queued for finalization by refcounting. For * mark-and-sweep FINALIZED is left set, so that * next mark-and-sweep round can make a rescue/free * decision. */ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(curr) >= 1); DUK_HEAPHDR_PREDEC_REFCOUNT(curr); /* Remove artificial refcount bump. */ DUK_HEAPHDR_CLEAR_FINALIZABLE(curr); DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap, curr); } else { /* No need to remove the refcount bump here. */ DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT); /* currently, always the case */ DUK_DD(DUK_DDPRINT("refcount finalize after finalizer call: %!O", curr)); duk_hobject_refcount_finalize_norz(heap, (duk_hobject *) curr); duk_free_hobject(heap, (duk_hobject *) curr); DUK_DD(DUK_DDPRINT("freed hobject after finalization: %p", (void *) curr)); } #else /* DUK_USE_REFERENCE_COUNTING */ DUK_HEAPHDR_CLEAR_FINALIZABLE(curr); DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap, curr); #endif /* DUK_USE_REFERENCE_COUNTING */ #if defined(DUK_USE_DEBUG) count++; #endif #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(heap->currently_finalizing != NULL); heap->currently_finalizing = NULL; #endif } /* finalize_list will always be processed completely. */ DUK_ASSERT(heap->finalize_list == NULL); #if 0 /* While NORZ macros are used above, this is unnecessary because the * only pending side effects are now finalizers, and finalize_list is * empty. */ DUK_REFZERO_CHECK_SLOW(heap->heap_thread); #endif /* Prevent count may be bumped while finalizers run, but should always * be reliably unbumped by the time we get here. */ DUK_ASSERT(heap->pf_prevent_count == 1); heap->pf_prevent_count = 0; #if defined(DUK_USE_DEBUG) DUK_DD(DUK_DDPRINT("duk_heap_process_finalize_list: %ld finalizers called", (long) count)); #endif } /* * Run an duk_hobject finalizer. Must never throw an uncaught error * (but may throw caught errors). * * There is no return value. Any return value or error thrown by * the finalizer is ignored (although errors are debug logged). * * Notes: * * - The finalizer thread 'top' assertions are there because it is * critical that strict stack policy is observed (i.e. no cruft * left on the finalizer stack). */ DUK_LOCAL duk_ret_t duk__finalize_helper(duk_hthread *thr, void *udata) { DUK_ASSERT(thr != NULL); DUK_UNREF(udata); DUK_DDD(DUK_DDDPRINT("protected finalization helper running")); /* [... obj] */ /* _Finalizer property is read without checking if the value is * callable or even exists. This is intentional, and handled * by throwing an error which is caught by the safe call wrapper. * * XXX: Finalizer lookup should traverse the prototype chain (to allow * inherited finalizers) but should not invoke accessors or proxy object * behavior. At the moment this lookup will invoke proxy behavior, so * caller must ensure that this function is not called if the target is * a Proxy. */ duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_INT_FINALIZER); /* -> [... obj finalizer] */ duk_dup_m2(thr); duk_push_boolean(thr, DUK_HEAP_HAS_FINALIZER_NORESCUE(thr->heap)); DUK_DDD(DUK_DDDPRINT("calling finalizer")); duk_call(thr, 2); /* [ ... obj finalizer obj heapDestruct ] -> [ ... obj retval ] */ DUK_DDD(DUK_DDDPRINT("finalizer returned successfully")); return 0; /* Note: we rely on duk_safe_call() to fix up the stack for the caller, * so we don't need to pop stuff here. There is no return value; * caller determines rescued status based on object refcount. */ } DUK_INTERNAL void duk_heap_run_finalizer(duk_heap *heap, duk_hobject *obj) { duk_hthread *thr; duk_ret_t rc; #if defined(DUK_USE_ASSERTIONS) duk_idx_t entry_top; #endif DUK_DD(DUK_DDPRINT("running duk_hobject finalizer for object: %p", (void *) obj)); DUK_ASSERT(heap != NULL); DUK_ASSERT(heap->heap_thread != NULL); thr = heap->heap_thread; DUK_ASSERT(obj != NULL); DUK_ASSERT_VALSTACK_SPACE(heap->heap_thread, 1); #if defined(DUK_USE_ASSERTIONS) entry_top = duk_get_top(thr); #endif /* * Get and call the finalizer. All of this must be wrapped * in a protected call, because even getting the finalizer * may trigger an error (getter may throw one, for instance). */ /* ROM objects could inherit a finalizer, but they are never deemed * unreachable by mark-and-sweep, and their refcount never falls to 0. */ DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)); /* Duktape 2.1: finalize_list never contains objects with FINALIZED * set, so no need to check here. */ DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) obj)); #if 0 if (DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) obj)) { DUK_D(DUK_DPRINT("object already finalized, avoid running finalizer twice: %!O", obj)); return; } #endif DUK_HEAPHDR_SET_FINALIZED((duk_heaphdr *) obj); /* ensure never re-entered until rescue cycle complete */ #if defined(DUK_USE_ES6_PROXY) if (DUK_HOBJECT_IS_PROXY(obj)) { /* This may happen if duk_set_finalizer() or Duktape.fin() is * called for a Proxy object. In such cases the fast finalizer * flag will be set on the Proxy, not the target, and neither * will be finalized. */ DUK_D(DUK_DPRINT("object is a Proxy, skip finalizer call")); return; } #endif /* DUK_USE_ES6_PROXY */ duk_push_hobject(thr, obj); /* this also increases refcount by one */ rc = duk_safe_call(thr, duk__finalize_helper, NULL /*udata*/, 0 /*nargs*/, 1 /*nrets*/); /* -> [... obj retval/error] */ DUK_ASSERT_TOP(thr, entry_top + 2); /* duk_safe_call discipline */ if (rc != DUK_EXEC_SUCCESS) { /* Note: we ask for one return value from duk_safe_call to get this * error debugging here. */ DUK_D(DUK_DPRINT("wrapped finalizer call failed for object %p (ignored); error: %!T", (void *) obj, (duk_tval *) duk_get_tval(thr, -1))); } duk_pop_2(thr); /* -> [...] */ DUK_ASSERT_TOP(thr, entry_top); } #else /* DUK_USE_FINALIZER_SUPPORT */ /* nothing */ #endif /* DUK_USE_FINALIZER_SUPPORT */ /* * String hash computation (interning). * * String hashing is performance critical because a string hash is computed * for all new strings which are candidates to be added to the string table. * However, strings actually added to the string table go through a codepoint * length calculation which dominates performance because it goes through * every byte of the input string (but only for strings added). * * The string hash algorithm should be fast, but on the other hand provide * good enough hashes to ensure both string table and object property table * hash tables work reasonably well (i.e., there aren't too many collisions * with real world inputs). Unless the hash is cryptographic, it's always * possible to craft inputs with maximal hash collisions. * * NOTE: The hash algorithms must match tools/dukutil.py:duk_heap_hashstring() * for ROM string support! */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_STRHASH_DENSE) /* Constants for duk_hashstring(). */ #define DUK__STRHASH_SHORTSTRING 4096L #define DUK__STRHASH_MEDIUMSTRING (256L * 1024L) #define DUK__STRHASH_BLOCKSIZE 256L DUK_INTERNAL duk_uint32_t duk_heap_hashstring(duk_heap *heap, const duk_uint8_t *str, duk_size_t len) { duk_uint32_t hash; /* Use Murmurhash2 directly for short strings, and use "block skipping" * for long strings: hash an initial part and then sample the rest of * the string with reasonably sized chunks. An initial offset for the * sampling is computed based on a hash of the initial part of the string; * this is done to (usually) avoid the case where all long strings have * certain offset ranges which are never sampled. * * Skip should depend on length and bound the total time to roughly * logarithmic. With current values: * * 1M string => 256 * 241 = 61696 bytes (0.06M) of hashing * 1G string => 256 * 16321 = 4178176 bytes (3.98M) of hashing * * XXX: It would be better to compute the skip offset more "smoothly" * instead of having a few boundary values. */ /* note: mixing len into seed improves hashing when skipping */ duk_uint32_t str_seed = heap->hash_seed ^ ((duk_uint32_t) len); if (len <= DUK__STRHASH_SHORTSTRING) { hash = duk_util_hashbytes(str, len, str_seed); } else { duk_size_t off; duk_size_t skip; if (len <= DUK__STRHASH_MEDIUMSTRING) { skip = (duk_size_t) (16 * DUK__STRHASH_BLOCKSIZE + DUK__STRHASH_BLOCKSIZE); } else { skip = (duk_size_t) (256 * DUK__STRHASH_BLOCKSIZE + DUK__STRHASH_BLOCKSIZE); } hash = duk_util_hashbytes(str, (duk_size_t) DUK__STRHASH_SHORTSTRING, str_seed); off = DUK__STRHASH_SHORTSTRING + (skip * (hash % 256)) / 256; /* XXX: inefficient loop */ while (off < len) { duk_size_t left = len - off; duk_size_t now = (duk_size_t) (left > DUK__STRHASH_BLOCKSIZE ? DUK__STRHASH_BLOCKSIZE : left); hash ^= duk_util_hashbytes(str + off, now, str_seed); off += skip; } } #if defined(DUK_USE_STRHASH16) /* Truncate to 16 bits here, so that a computed hash can be compared * against a hash stored in a 16-bit field. */ hash &= 0x0000ffffUL; #endif return hash; } #else /* DUK_USE_STRHASH_DENSE */ DUK_INTERNAL duk_uint32_t duk_heap_hashstring(duk_heap *heap, const duk_uint8_t *str, duk_size_t len) { duk_uint32_t hash; duk_size_t step; duk_size_t off; /* Slightly modified "Bernstein hash" from: * * http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx * * Modifications: string skipping and reverse direction similar to * Lua 5.1.5, and different hash initializer. * * The reverse direction ensures last byte it always included in the * hash which is a good default as changing parts of the string are * more often in the suffix than in the prefix. */ hash = heap->hash_seed ^ ((duk_uint32_t) len); /* Bernstein hash init value is normally 5381 */ step = (len >> DUK_USE_STRHASH_SKIP_SHIFT) + 1; for (off = len; off >= step; off -= step) { DUK_ASSERT(off >= 1); /* off >= step, and step >= 1 */ hash = (hash * 33) + str[off - 1]; } #if defined(DUK_USE_STRHASH16) /* Truncate to 16 bits here, so that a computed hash can be compared * against a hash stored in a 16-bit field. */ hash &= 0x0000ffffUL; #endif return hash; } #endif /* DUK_USE_STRHASH_DENSE */ /* automatic undefs */ #undef DUK__STRHASH_BLOCKSIZE #undef DUK__STRHASH_MEDIUMSTRING #undef DUK__STRHASH_SHORTSTRING /* * Mark-and-sweep garbage collection. */ /* #include duk_internal.h -> already included */ DUK_LOCAL_DECL void duk__mark_heaphdr(duk_heap *heap, duk_heaphdr *h); DUK_LOCAL_DECL void duk__mark_heaphdr_nonnull(duk_heap *heap, duk_heaphdr *h); DUK_LOCAL_DECL void duk__mark_tval(duk_heap *heap, duk_tval *tv); DUK_LOCAL_DECL void duk__mark_tvals(duk_heap *heap, duk_tval *tv, duk_idx_t count); /* * Marking functions for heap types: mark children recursively. */ DUK_LOCAL void duk__mark_hstring(duk_heap *heap, duk_hstring *h) { DUK_UNREF(heap); DUK_UNREF(h); DUK_DDD(DUK_DDDPRINT("duk__mark_hstring: %p", (void *) h)); DUK_ASSERT(h); DUK_HSTRING_ASSERT_VALID(h); /* nothing to process */ } DUK_LOCAL void duk__mark_hobject(duk_heap *heap, duk_hobject *h) { duk_uint_fast32_t i; DUK_DDD(DUK_DDDPRINT("duk__mark_hobject: %p", (void *) h)); DUK_ASSERT(h); DUK_HOBJECT_ASSERT_VALID(h); /* XXX: use advancing pointers instead of index macros -> faster and smaller? */ for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h); i++) { duk_hstring *key = DUK_HOBJECT_E_GET_KEY(heap, h, i); if (key == NULL) { continue; } duk__mark_heaphdr_nonnull(heap, (duk_heaphdr *) key); if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap, h, i)) { duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->a.get); duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->a.set); } else { duk__mark_tval(heap, &DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->v); } } for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(h); i++) { duk__mark_tval(heap, DUK_HOBJECT_A_GET_VALUE_PTR(heap, h, i)); } /* Hash part is a 'weak reference' and does not contribute. */ duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HOBJECT_GET_PROTOTYPE(heap, h)); /* Fast path for objects which don't have a subclass struct, or have a * subclass struct but nothing that needs marking in the subclass struct. */ if (DUK_HOBJECT_HAS_FASTREFS(h)) { DUK_ASSERT(DUK_HOBJECT_ALLOWS_FASTREFS(h)); return; } DUK_ASSERT(DUK_HOBJECT_PROHIBITS_FASTREFS(h)); /* XXX: reorg, more common first */ if (DUK_HOBJECT_IS_COMPFUNC(h)) { duk_hcompfunc *f = (duk_hcompfunc *) h; duk_tval *tv, *tv_end; duk_hobject **fn, **fn_end; DUK_HCOMPFUNC_ASSERT_VALID(f); /* 'data' is reachable through every compiled function which * contains a reference. */ duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HCOMPFUNC_GET_DATA(heap, f)); duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HCOMPFUNC_GET_LEXENV(heap, f)); duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HCOMPFUNC_GET_VARENV(heap, f)); if (DUK_HCOMPFUNC_GET_DATA(heap, f) != NULL) { tv = DUK_HCOMPFUNC_GET_CONSTS_BASE(heap, f); tv_end = DUK_HCOMPFUNC_GET_CONSTS_END(heap, f); while (tv < tv_end) { duk__mark_tval(heap, tv); tv++; } fn = DUK_HCOMPFUNC_GET_FUNCS_BASE(heap, f); fn_end = DUK_HCOMPFUNC_GET_FUNCS_END(heap, f); while (fn < fn_end) { duk__mark_heaphdr_nonnull(heap, (duk_heaphdr *) *fn); fn++; } } else { /* May happen in some out-of-memory corner cases. */ DUK_D(DUK_DPRINT("duk_hcompfunc 'data' is NULL, skipping marking")); } } else if (DUK_HOBJECT_IS_DECENV(h)) { duk_hdecenv *e = (duk_hdecenv *) h; DUK_HDECENV_ASSERT_VALID(e); duk__mark_heaphdr(heap, (duk_heaphdr *) e->thread); duk__mark_heaphdr(heap, (duk_heaphdr *) e->varmap); } else if (DUK_HOBJECT_IS_OBJENV(h)) { duk_hobjenv *e = (duk_hobjenv *) h; DUK_HOBJENV_ASSERT_VALID(e); duk__mark_heaphdr_nonnull(heap, (duk_heaphdr *) e->target); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) } else if (DUK_HOBJECT_IS_BUFOBJ(h)) { duk_hbufobj *b = (duk_hbufobj *) h; DUK_HBUFOBJ_ASSERT_VALID(b); duk__mark_heaphdr(heap, (duk_heaphdr *) b->buf); duk__mark_heaphdr(heap, (duk_heaphdr *) b->buf_prop); #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ } else if (DUK_HOBJECT_IS_BOUNDFUNC(h)) { duk_hboundfunc *f = (duk_hboundfunc *) (void *) h; DUK_HBOUNDFUNC_ASSERT_VALID(f); duk__mark_tval(heap, &f->target); duk__mark_tval(heap, &f->this_binding); duk__mark_tvals(heap, f->args, f->nargs); #if defined(DUK_USE_ES6_PROXY) } else if (DUK_HOBJECT_IS_PROXY(h)) { duk_hproxy *p = (duk_hproxy *) h; DUK_HPROXY_ASSERT_VALID(p); duk__mark_heaphdr_nonnull(heap, (duk_heaphdr *) p->target); duk__mark_heaphdr_nonnull(heap, (duk_heaphdr *) p->handler); #endif /* DUK_USE_ES6_PROXY */ } else if (DUK_HOBJECT_IS_THREAD(h)) { duk_hthread *t = (duk_hthread *) h; duk_activation *act; duk_tval *tv; DUK_HTHREAD_ASSERT_VALID(t); tv = t->valstack; while (tv < t->valstack_top) { duk__mark_tval(heap, tv); tv++; } for (act = t->callstack_curr; act != NULL; act = act->parent) { duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_ACT_GET_FUNC(act)); duk__mark_heaphdr(heap, (duk_heaphdr *) act->var_env); duk__mark_heaphdr(heap, (duk_heaphdr *) act->lex_env); #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) duk__mark_heaphdr(heap, (duk_heaphdr *) act->prev_caller); #endif #if 0 /* nothing now */ for (cat = act->cat; cat != NULL; cat = cat->parent) { } #endif } duk__mark_heaphdr(heap, (duk_heaphdr *) t->resumer); for (i = 0; i < DUK_NUM_BUILTINS; i++) { duk__mark_heaphdr(heap, (duk_heaphdr *) t->builtins[i]); } } else { /* We may come here if the object should have a FASTREFS flag * but it's missing for some reason. Assert for never getting * here; however, other than performance, this is harmless. */ DUK_D(DUK_DPRINT("missing FASTREFS flag for: %!iO", h)); DUK_ASSERT(0); } } /* Mark any duk_heaphdr type. Recursion tracking happens only here. */ DUK_LOCAL void duk__mark_heaphdr(duk_heap *heap, duk_heaphdr *h) { DUK_DDD(DUK_DDDPRINT("duk__mark_heaphdr %p, type %ld", (void *) h, (h != NULL ? (long) DUK_HEAPHDR_GET_TYPE(h) : (long) -1))); /* XXX: add non-null variant? */ if (h == NULL) { return; } DUK_HEAPHDR_ASSERT_VALID(h); DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY(h) || DUK_HEAPHDR_HAS_REACHABLE(h)); #if defined(DUK_USE_ASSERTIONS) && defined(DUK_USE_REFERENCE_COUNTING) if (!DUK_HEAPHDR_HAS_READONLY(h)) { h->h_assert_refcount++; /* Comparison refcount: bump even if already reachable. */ } #endif if (DUK_HEAPHDR_HAS_REACHABLE(h)) { DUK_DDD(DUK_DDDPRINT("already marked reachable, skip")); return; } #if defined(DUK_USE_ROM_OBJECTS) /* READONLY objects always have REACHABLE set, so the check above * will prevent READONLY objects from being marked here. */ DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY(h)); #endif DUK_HEAPHDR_SET_REACHABLE(h); if (heap->ms_recursion_depth >= DUK_USE_MARK_AND_SWEEP_RECLIMIT) { DUK_D(DUK_DPRINT("mark-and-sweep recursion limit reached, marking as temproot: %p", (void *) h)); DUK_HEAP_SET_MARKANDSWEEP_RECLIMIT_REACHED(heap); DUK_HEAPHDR_SET_TEMPROOT(h); return; } heap->ms_recursion_depth++; DUK_ASSERT(heap->ms_recursion_depth != 0); /* Wrap. */ switch (DUK_HEAPHDR_GET_TYPE(h)) { case DUK_HTYPE_STRING: duk__mark_hstring(heap, (duk_hstring *) h); break; case DUK_HTYPE_OBJECT: duk__mark_hobject(heap, (duk_hobject *) h); break; case DUK_HTYPE_BUFFER: /* nothing to mark */ break; default: DUK_D(DUK_DPRINT("attempt to mark heaphdr %p with invalid htype %ld", (void *) h, (long) DUK_HEAPHDR_GET_TYPE(h))); DUK_UNREACHABLE(); } DUK_ASSERT(heap->ms_recursion_depth > 0); heap->ms_recursion_depth--; } DUK_LOCAL void duk__mark_tval(duk_heap *heap, duk_tval *tv) { DUK_DDD(DUK_DDDPRINT("duk__mark_tval %p", (void *) tv)); if (tv == NULL) { return; } DUK_TVAL_ASSERT_VALID(tv); if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) { duk_heaphdr *h; h = DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(h != NULL); duk__mark_heaphdr_nonnull(heap, h); } } DUK_LOCAL void duk__mark_tvals(duk_heap *heap, duk_tval *tv, duk_idx_t count) { DUK_ASSERT(count == 0 || tv != NULL); while (count-- > 0) { DUK_TVAL_ASSERT_VALID(tv); if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) { duk_heaphdr *h; h = DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(h != NULL); duk__mark_heaphdr_nonnull(heap, h); } tv++; } } /* Mark any duk_heaphdr type, caller guarantees a non-NULL pointer. */ DUK_LOCAL void duk__mark_heaphdr_nonnull(duk_heap *heap, duk_heaphdr *h) { /* For now, just call the generic handler. Change when call sites * are changed too. */ duk__mark_heaphdr(heap, h); } /* * Mark the heap. */ DUK_LOCAL void duk__mark_roots_heap(duk_heap *heap) { duk_small_uint_t i; DUK_DD(DUK_DDPRINT("duk__mark_roots_heap: %p", (void *) heap)); duk__mark_heaphdr(heap, (duk_heaphdr *) heap->heap_thread); duk__mark_heaphdr(heap, (duk_heaphdr *) heap->heap_object); for (i = 0; i < DUK_HEAP_NUM_STRINGS; i++) { duk_hstring *h = DUK_HEAP_GET_STRING(heap, i); duk__mark_heaphdr(heap, (duk_heaphdr *) h); } duk__mark_tval(heap, &heap->lj.value1); duk__mark_tval(heap, &heap->lj.value2); #if defined(DUK_USE_DEBUGGER_SUPPORT) for (i = 0; i < heap->dbg_breakpoint_count; i++) { duk__mark_heaphdr(heap, (duk_heaphdr *) heap->dbg_breakpoints[i].filename); } #endif } /* * Mark unreachable, finalizable objects. * * Such objects will be moved aside and their finalizers run later. They * have to be treated as reachability roots for their properties etc to * remain allocated. This marking is only done for unreachable values which * would be swept later. * * Objects are first marked FINALIZABLE and only then marked as reachability * roots; otherwise circular references might be handled inconsistently. */ #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_LOCAL void duk__mark_finalizable(duk_heap *heap) { duk_heaphdr *hdr; duk_size_t count_finalizable = 0; DUK_DD(DUK_DDPRINT("duk__mark_finalizable: %p", (void *) heap)); DUK_ASSERT(heap->heap_thread != NULL); hdr = heap->heap_allocated; while (hdr != NULL) { /* A finalizer is looked up from the object and up its * prototype chain (which allows inherited finalizers). * The finalizer is checked for using a duk_hobject flag * which is kept in sync with the presence and callability * of a _Finalizer hidden symbol. */ if (!DUK_HEAPHDR_HAS_REACHABLE(hdr) && DUK_HEAPHDR_IS_OBJECT(hdr) && !DUK_HEAPHDR_HAS_FINALIZED(hdr) && DUK_HOBJECT_HAS_FINALIZER_FAST(heap, (duk_hobject *) hdr)) { /* heaphdr: * - is not reachable * - is an object * - is not a finalized object waiting for rescue/keep decision * - has a finalizer */ DUK_DD(DUK_DDPRINT("unreachable heap object will be " "finalized -> mark as finalizable " "and treat as a reachability root: %p", (void *) hdr)); DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY(hdr)); DUK_HEAPHDR_SET_FINALIZABLE(hdr); count_finalizable++; } hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr); } if (count_finalizable == 0) { return; } DUK_DD(DUK_DDPRINT("marked %ld heap objects as finalizable, now mark them reachable", (long) count_finalizable)); hdr = heap->heap_allocated; while (hdr != NULL) { if (DUK_HEAPHDR_HAS_FINALIZABLE(hdr)) { duk__mark_heaphdr_nonnull(heap, hdr); } hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr); } /* Caller will finish the marking process if we hit a recursion limit. */ } #endif /* DUK_USE_FINALIZER_SUPPORT */ /* * Mark objects on finalize_list. */ #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_LOCAL void duk__mark_finalize_list(duk_heap *heap) { duk_heaphdr *hdr; #if defined(DUK_USE_DEBUG) duk_size_t count_finalize_list = 0; #endif DUK_DD(DUK_DDPRINT("duk__mark_finalize_list: %p", (void *) heap)); hdr = heap->finalize_list; while (hdr != NULL) { duk__mark_heaphdr_nonnull(heap, hdr); hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr); #if defined(DUK_USE_DEBUG) count_finalize_list++; #endif } #if defined(DUK_USE_DEBUG) if (count_finalize_list > 0) { DUK_D(DUK_DPRINT("marked %ld objects on the finalize_list as reachable (previous finalizer run skipped)", (long) count_finalize_list)); } #endif } #endif /* DUK_USE_FINALIZER_SUPPORT */ /* * Fallback marking handler if recursion limit is reached. * * Iterates 'temproots' until recursion limit is no longer hit. Temproots * can be in heap_allocated or finalize_list; refzero_list is now always * empty for mark-and-sweep. A temproot may occur in finalize_list now if * there are objects on the finalize_list and user code creates a reference * from an object in heap_allocated to the object in finalize_list (which is * now allowed), and it happened to coincide with the recursion depth limit. * * This is a slow scan, but guarantees that we finish with a bounded C stack. * * Note that nodes may have been marked as temproots before this scan begun, * OR they may have been marked during the scan (as we process nodes * recursively also during the scan). This is intended behavior. */ #if defined(DUK_USE_DEBUG) DUK_LOCAL void duk__handle_temproot(duk_heap *heap, duk_heaphdr *hdr, duk_size_t *count) { #else DUK_LOCAL void duk__handle_temproot(duk_heap *heap, duk_heaphdr *hdr) { #endif DUK_ASSERT(hdr != NULL); if (!DUK_HEAPHDR_HAS_TEMPROOT(hdr)) { DUK_DDD(DUK_DDDPRINT("not a temp root: %p", (void *) hdr)); return; } DUK_DDD(DUK_DDDPRINT("found a temp root: %p", (void *) hdr)); DUK_HEAPHDR_CLEAR_TEMPROOT(hdr); DUK_HEAPHDR_CLEAR_REACHABLE(hdr); /* Done so that duk__mark_heaphdr() works correctly. */ #if defined(DUK_USE_ASSERTIONS) && defined(DUK_USE_REFERENCE_COUNTING) hdr->h_assert_refcount--; /* Same node visited twice. */ #endif duk__mark_heaphdr_nonnull(heap, hdr); #if defined(DUK_USE_DEBUG) (*count)++; #endif } DUK_LOCAL void duk__mark_temproots_by_heap_scan(duk_heap *heap) { duk_heaphdr *hdr; #if defined(DUK_USE_DEBUG) duk_size_t count; #endif DUK_DD(DUK_DDPRINT("duk__mark_temproots_by_heap_scan: %p", (void *) heap)); while (DUK_HEAP_HAS_MARKANDSWEEP_RECLIMIT_REACHED(heap)) { DUK_DD(DUK_DDPRINT("recursion limit reached, doing heap scan to continue from temproots")); #if defined(DUK_USE_DEBUG) count = 0; #endif DUK_HEAP_CLEAR_MARKANDSWEEP_RECLIMIT_REACHED(heap); hdr = heap->heap_allocated; while (hdr) { #if defined(DUK_USE_DEBUG) duk__handle_temproot(heap, hdr, &count); #else duk__handle_temproot(heap, hdr); #endif hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr); } #if defined(DUK_USE_FINALIZER_SUPPORT) hdr = heap->finalize_list; while (hdr) { #if defined(DUK_USE_DEBUG) duk__handle_temproot(heap, hdr, &count); #else duk__handle_temproot(heap, hdr); #endif hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr); } #endif #if defined(DUK_USE_DEBUG) DUK_DD(DUK_DDPRINT("temproot mark heap scan processed %ld temp roots", (long) count)); #endif } } /* * Finalize refcounts for heap elements just about to be freed. * This must be done for all objects before freeing to avoid any * stale pointer dereferences. * * Note that this must deduce the set of objects to be freed * identically to duk__sweep_heap(). */ #if defined(DUK_USE_REFERENCE_COUNTING) DUK_LOCAL void duk__finalize_refcounts(duk_heap *heap) { duk_heaphdr *hdr; DUK_ASSERT(heap->heap_thread != NULL); DUK_DD(DUK_DDPRINT("duk__finalize_refcounts: heap=%p", (void *) heap)); hdr = heap->heap_allocated; while (hdr) { if (!DUK_HEAPHDR_HAS_REACHABLE(hdr)) { /* * Unreachable object about to be swept. Finalize target refcounts * (objects which the unreachable object points to) without doing * refzero processing. Recursive decrefs are also prevented when * refzero processing is disabled. * * Value cannot be a finalizable object, as they have been made * temporarily reachable for this round. */ DUK_DDD(DUK_DDDPRINT("unreachable object, refcount finalize before sweeping: %p", (void *) hdr)); /* Finalize using heap->heap_thread; DECREF has a * suppress check for mark-and-sweep which is based * on heap->ms_running. */ duk_heaphdr_refcount_finalize_norz(heap, hdr); } hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr); } } #endif /* DUK_USE_REFERENCE_COUNTING */ /* * Clear (reachable) flags of finalize_list. * * We could mostly do in the sweep phase when we move objects from the * heap into the finalize_list. However, if a finalizer run is skipped * during a mark-and-sweep, the objects on the finalize_list will be marked * reachable during the next mark-and-sweep. Since they're already on the * finalize_list, no-one will be clearing their REACHABLE flag so we do it * here. (This now overlaps with the sweep handling in a harmless way.) */ #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_LOCAL void duk__clear_finalize_list_flags(duk_heap *heap) { duk_heaphdr *hdr; DUK_DD(DUK_DDPRINT("duk__clear_finalize_list_flags: %p", (void *) heap)); hdr = heap->finalize_list; while (hdr) { DUK_HEAPHDR_CLEAR_REACHABLE(hdr); #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(DUK_HEAPHDR_HAS_FINALIZABLE(hdr) || \ (heap->currently_finalizing == hdr)); #endif /* DUK_HEAPHDR_FLAG_FINALIZED may be set. */ DUK_ASSERT(!DUK_HEAPHDR_HAS_TEMPROOT(hdr)); hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr); } } #endif /* DUK_USE_FINALIZER_SUPPORT */ /* * Sweep stringtable. */ DUK_LOCAL void duk__sweep_stringtable(duk_heap *heap, duk_size_t *out_count_keep) { duk_hstring *h; duk_hstring *prev; duk_uint32_t i; #if defined(DUK_USE_DEBUG) duk_size_t count_free = 0; #endif duk_size_t count_keep = 0; DUK_DD(DUK_DDPRINT("duk__sweep_stringtable: %p", (void *) heap)); #if defined(DUK_USE_STRTAB_PTRCOMP) if (heap->strtable16 == NULL) { #else if (heap->strtable == NULL) { #endif goto done; } for (i = 0; i < heap->st_size; i++) { #if defined(DUK_USE_STRTAB_PTRCOMP) h = DUK_USE_HEAPPTR_DEC16(heap->heap_udata, heap->strtable16[i]); #else h = heap->strtable[i]; #endif prev = NULL; while (h != NULL) { duk_hstring *next; next = h->hdr.h_next; if (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h)) { DUK_HEAPHDR_CLEAR_REACHABLE((duk_heaphdr *) h); count_keep++; prev = h; } else { #if defined(DUK_USE_DEBUG) count_free++; #endif /* For pinned strings the refcount has been * bumped. We could unbump it here before * freeing, but that's actually not necessary * except for assertions. */ #if 0 if (DUK_HSTRING_HAS_PINNED_LITERAL(h)) { DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) > 0U); DUK_HSTRING_DECREF_NORZ(heap->heap_thread, h); DUK_HSTRING_CLEAR_PINNED_LITERAL(h); } #endif #if defined(DUK_USE_REFERENCE_COUNTING) /* Non-zero refcounts should not happen for unreachable strings, * because we refcount finalize all unreachable objects which * should have decreased unreachable string refcounts to zero * (even for cycles). However, pinned strings have a +1 bump. */ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) == DUK_HSTRING_HAS_PINNED_LITERAL(h) ? 1U : 0U); #endif /* Deal with weak references first. */ duk_heap_strcache_string_remove(heap, (duk_hstring *) h); /* Remove the string from the string table. */ duk_heap_strtable_unlink_prev(heap, (duk_hstring *) h, (duk_hstring *) prev); /* Free inner references (these exist e.g. when external * strings are enabled) and the struct itself. */ duk_free_hstring(heap, (duk_hstring *) h); /* Don't update 'prev'; it should be last string kept. */ } h = next; } } done: #if defined(DUK_USE_DEBUG) DUK_D(DUK_DPRINT("mark-and-sweep sweep stringtable: %ld freed, %ld kept", (long) count_free, (long) count_keep)); #endif *out_count_keep = count_keep; } /* * Sweep heap. */ DUK_LOCAL void duk__sweep_heap(duk_heap *heap, duk_small_uint_t flags, duk_size_t *out_count_keep) { duk_heaphdr *prev; /* last element that was left in the heap */ duk_heaphdr *curr; duk_heaphdr *next; #if defined(DUK_USE_DEBUG) duk_size_t count_free = 0; duk_size_t count_finalize = 0; duk_size_t count_rescue = 0; #endif duk_size_t count_keep = 0; DUK_DD(DUK_DDPRINT("duk__sweep_heap: %p", (void *) heap)); prev = NULL; curr = heap->heap_allocated; heap->heap_allocated = NULL; while (curr) { /* Strings and ROM objects are never placed on the heap allocated list. */ DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) != DUK_HTYPE_STRING); DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY(curr)); next = DUK_HEAPHDR_GET_NEXT(heap, curr); if (DUK_HEAPHDR_HAS_REACHABLE(curr)) { /* * Reachable object: * - If FINALIZABLE -> actually unreachable (but marked * artificially reachable), queue to finalize_list. * - If !FINALIZABLE but FINALIZED -> rescued after * finalizer execution. * - Otherwise just a normal, reachable object. * * Objects which are kept are queued to heap_allocated * tail (we're essentially filtering heap_allocated in * practice). */ #if defined(DUK_USE_FINALIZER_SUPPORT) if (DUK_UNLIKELY(DUK_HEAPHDR_HAS_FINALIZABLE(curr))) { DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(curr)); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT); DUK_DD(DUK_DDPRINT("sweep; reachable, finalizable --> move to finalize_list: %p", (void *) curr)); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_HEAPHDR_PREINC_REFCOUNT(curr); /* Bump refcount so that refzero never occurs when pending a finalizer call. */ #endif DUK_HEAP_INSERT_INTO_FINALIZE_LIST(heap, curr); #if defined(DUK_USE_DEBUG) count_finalize++; #endif } else #endif /* DUK_USE_FINALIZER_SUPPORT */ { if (DUK_UNLIKELY(DUK_HEAPHDR_HAS_FINALIZED(curr))) { DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(curr)); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT); if (flags & DUK_MS_FLAG_POSTPONE_RESCUE) { DUK_DD(DUK_DDPRINT("sweep; reachable, finalized, but postponing rescue decisions --> keep object (with FINALIZED set): %!iO", curr)); count_keep++; } else { DUK_DD(DUK_DDPRINT("sweep; reachable, finalized --> rescued after finalization: %p", (void *) curr)); #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_HEAPHDR_CLEAR_FINALIZED(curr); #endif #if defined(DUK_USE_DEBUG) count_rescue++; #endif } } else { DUK_DD(DUK_DDPRINT("sweep; reachable --> keep: %!iO", curr)); count_keep++; } if (prev != NULL) { DUK_ASSERT(heap->heap_allocated != NULL); DUK_HEAPHDR_SET_NEXT(heap, prev, curr); } else { DUK_ASSERT(heap->heap_allocated == NULL); heap->heap_allocated = curr; } #if defined(DUK_USE_DOUBLE_LINKED_HEAP) DUK_HEAPHDR_SET_PREV(heap, curr, prev); #endif DUK_HEAPHDR_ASSERT_LINKS(heap, prev); DUK_HEAPHDR_ASSERT_LINKS(heap, curr); prev = curr; } /* * Shrink check for value stacks here. We're inside * ms_prevent_count protection which prevents recursive * mark-and-sweep and refzero finalizers, so there are * no side effects that would affect the heap lists. */ if (DUK_HEAPHDR_IS_OBJECT(curr) && DUK_HOBJECT_IS_THREAD((duk_hobject *) curr)) { duk_hthread *thr_curr = (duk_hthread *) curr; DUK_DD(DUK_DDPRINT("value stack shrink check for thread: %!O", curr)); duk_valstack_shrink_check_nothrow(thr_curr, flags & DUK_MS_FLAG_EMERGENCY /*snug*/); } DUK_HEAPHDR_CLEAR_REACHABLE(curr); /* Keep FINALIZED if set, used if rescue decisions are postponed. */ /* Keep FINALIZABLE for objects on finalize_list. */ DUK_ASSERT(!DUK_HEAPHDR_HAS_REACHABLE(curr)); } else { /* * Unreachable object: * - If FINALIZED, object was finalized but not * rescued. This doesn't affect freeing. * - Otherwise normal unreachable object. * * There's no guard preventing a FINALIZED object * from being freed while finalizers execute: the * artificial finalize_list reachability roots can't * cause an incorrect free decision (but can cause * an incorrect rescue decision). */ #if defined(DUK_USE_REFERENCE_COUNTING) /* Non-zero refcounts should not happen because we refcount * finalize all unreachable objects which should cancel out * refcounts (even for cycles). */ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(curr) == 0); #endif DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(curr)); #if defined(DUK_USE_DEBUG) if (DUK_HEAPHDR_HAS_FINALIZED(curr)) { DUK_DD(DUK_DDPRINT("sweep; unreachable, finalized --> finalized object not rescued: %p", (void *) curr)); } else { DUK_DD(DUK_DDPRINT("sweep; not reachable --> free: %p", (void *) curr)); } #endif /* Note: object cannot be a finalizable unreachable object, as * they have been marked temporarily reachable for this round, * and are handled above. */ #if defined(DUK_USE_DEBUG) count_free++; #endif /* Weak refs should be handled here, but no weak refs for * any non-string objects exist right now. */ /* Free object and all auxiliary (non-heap) allocs. */ duk_heap_free_heaphdr_raw(heap, curr); } curr = next; } if (prev != NULL) { DUK_HEAPHDR_SET_NEXT(heap, prev, NULL); } DUK_HEAPHDR_ASSERT_LINKS(heap, prev); #if defined(DUK_USE_DEBUG) DUK_D(DUK_DPRINT("mark-and-sweep sweep objects (non-string): %ld freed, %ld kept, %ld rescued, %ld queued for finalization", (long) count_free, (long) count_keep, (long) count_rescue, (long) count_finalize)); #endif *out_count_keep = count_keep; } /* * Litcache helpers. */ #if defined(DUK_USE_LITCACHE_SIZE) DUK_LOCAL void duk__wipe_litcache(duk_heap *heap) { duk_uint_t i; duk_litcache_entry *e; e = heap->litcache; for (i = 0; i < DUK_USE_LITCACHE_SIZE; i++) { e->addr = NULL; /* e->h does not need to be invalidated: when e->addr is * NULL, e->h is considered garbage. */ e++; } } #endif /* DUK_USE_LITCACHE_SIZE */ /* * Object compaction. * * Compaction is assumed to never throw an error. */ DUK_LOCAL int duk__protected_compact_object(duk_hthread *thr, void *udata) { duk_hobject *obj; /* XXX: for threads, compact stacks? */ DUK_UNREF(udata); obj = duk_known_hobject(thr, -1); duk_hobject_compact_props(thr, obj); return 0; } #if defined(DUK_USE_DEBUG) DUK_LOCAL void duk__compact_object_list(duk_heap *heap, duk_hthread *thr, duk_heaphdr *start, duk_size_t *p_count_check, duk_size_t *p_count_compact, duk_size_t *p_count_bytes_saved) { #else DUK_LOCAL void duk__compact_object_list(duk_heap *heap, duk_hthread *thr, duk_heaphdr *start) { #endif duk_heaphdr *curr; #if defined(DUK_USE_DEBUG) duk_size_t old_size, new_size; #endif duk_hobject *obj; DUK_UNREF(heap); curr = start; while (curr) { DUK_DDD(DUK_DDDPRINT("mark-and-sweep compact: %p", (void *) curr)); if (DUK_HEAPHDR_GET_TYPE(curr) != DUK_HTYPE_OBJECT) { goto next; } obj = (duk_hobject *) curr; #if defined(DUK_USE_DEBUG) old_size = DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE(obj), DUK_HOBJECT_GET_ASIZE(obj), DUK_HOBJECT_GET_HSIZE(obj)); #endif DUK_DD(DUK_DDPRINT("compact object: %p", (void *) obj)); duk_push_hobject(thr, obj); /* XXX: disable error handlers for duration of compaction? */ duk_safe_call(thr, duk__protected_compact_object, NULL, 1, 0); #if defined(DUK_USE_DEBUG) new_size = DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE(obj), DUK_HOBJECT_GET_ASIZE(obj), DUK_HOBJECT_GET_HSIZE(obj)); #endif #if defined(DUK_USE_DEBUG) (*p_count_compact)++; (*p_count_bytes_saved) += (duk_size_t) (old_size - new_size); #endif next: curr = DUK_HEAPHDR_GET_NEXT(heap, curr); #if defined(DUK_USE_DEBUG) (*p_count_check)++; #endif } } DUK_LOCAL void duk__compact_objects(duk_heap *heap) { /* XXX: which lists should participate? to be finalized? */ #if defined(DUK_USE_DEBUG) duk_size_t count_check = 0; duk_size_t count_compact = 0; duk_size_t count_bytes_saved = 0; #endif DUK_DD(DUK_DDPRINT("duk__compact_objects: %p", (void *) heap)); DUK_ASSERT(heap->heap_thread != NULL); #if defined(DUK_USE_DEBUG) duk__compact_object_list(heap, heap->heap_thread, heap->heap_allocated, &count_check, &count_compact, &count_bytes_saved); #if defined(DUK_USE_FINALIZER_SUPPORT) duk__compact_object_list(heap, heap->heap_thread, heap->finalize_list, &count_check, &count_compact, &count_bytes_saved); #endif #else duk__compact_object_list(heap, heap->heap_thread, heap->heap_allocated); #if defined(DUK_USE_FINALIZER_SUPPORT) duk__compact_object_list(heap, heap->heap_thread, heap->finalize_list); #endif #endif #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(heap->refzero_list == NULL); /* Always handled to completion inline in DECREF. */ #endif #if defined(DUK_USE_DEBUG) DUK_D(DUK_DPRINT("mark-and-sweep compact objects: %ld checked, %ld compaction attempts, %ld bytes saved by compaction", (long) count_check, (long) count_compact, (long) count_bytes_saved)); #endif } /* * Assertion helpers. */ #if defined(DUK_USE_ASSERTIONS) typedef void (*duk__gc_heaphdr_assert)(duk_heap *heap, duk_heaphdr *h); typedef void (*duk__gc_hstring_assert)(duk_heap *heap, duk_hstring *h); DUK_LOCAL void duk__assert_walk_list(duk_heap *heap, duk_heaphdr *start, duk__gc_heaphdr_assert func) { duk_heaphdr *curr; for (curr = start; curr != NULL; curr = DUK_HEAPHDR_GET_NEXT(heap, curr)) { func(heap, curr); } } DUK_LOCAL void duk__assert_walk_strtable(duk_heap *heap, duk__gc_hstring_assert func) { duk_uint32_t i; for (i = 0; i < heap->st_size; i++) { duk_hstring *h; #if defined(DUK_USE_STRTAB_PTRCOMP) h = DUK_USE_HEAPPTR_DEC16(heap->heap_udata, heap->strtable16[i]); #else h = heap->strtable[i]; #endif while (h != NULL) { func(heap, h); h = h->hdr.h_next; } } } DUK_LOCAL void duk__assert_heaphdr_flags_cb(duk_heap *heap, duk_heaphdr *h) { DUK_UNREF(heap); DUK_ASSERT(!DUK_HEAPHDR_HAS_REACHABLE(h)); DUK_ASSERT(!DUK_HEAPHDR_HAS_TEMPROOT(h)); DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(h)); /* may have FINALIZED */ } DUK_LOCAL void duk__assert_heaphdr_flags(duk_heap *heap) { duk__assert_walk_list(heap, heap->heap_allocated, duk__assert_heaphdr_flags_cb); #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(heap->refzero_list == NULL); /* Always handled to completion inline in DECREF. */ #endif /* XXX: Assertions for finalize_list? */ } DUK_LOCAL void duk__assert_validity_cb1(duk_heap *heap, duk_heaphdr *h) { DUK_UNREF(heap); DUK_ASSERT(DUK_HEAPHDR_IS_OBJECT(h) || DUK_HEAPHDR_IS_BUFFER(h)); duk_heaphdr_assert_valid_subclassed(h); } DUK_LOCAL void duk__assert_validity_cb2(duk_heap *heap, duk_hstring *h) { DUK_UNREF(heap); DUK_ASSERT(DUK_HEAPHDR_IS_STRING((duk_heaphdr *) h)); duk_heaphdr_assert_valid_subclassed((duk_heaphdr *) h); } DUK_LOCAL void duk__assert_validity(duk_heap *heap) { duk__assert_walk_list(heap, heap->heap_allocated, duk__assert_validity_cb1); #if defined(DUK_USE_FINALIZER_SUPPORT) duk__assert_walk_list(heap, heap->finalize_list, duk__assert_validity_cb1); #endif #if defined(DUK_USE_REFERENCE_COUNTING) duk__assert_walk_list(heap, heap->refzero_list, duk__assert_validity_cb1); #endif duk__assert_walk_strtable(heap, duk__assert_validity_cb2); } #if defined(DUK_USE_REFERENCE_COUNTING) DUK_LOCAL void duk__assert_valid_refcounts_cb(duk_heap *heap, duk_heaphdr *h) { /* Cannot really assert much w.r.t. refcounts now. */ DUK_UNREF(heap); if (DUK_HEAPHDR_GET_REFCOUNT(h) == 0 && DUK_HEAPHDR_HAS_FINALIZED(h)) { /* An object may be in heap_allocated list with a zero * refcount if it has just been finalized and is waiting * to be collected by the next cycle. * (This doesn't currently happen however.) */ } else if (DUK_HEAPHDR_GET_REFCOUNT(h) == 0) { /* An object may be in heap_allocated list with a zero * refcount also if it is a temporary object created * during debugger paused state. It will get collected * by mark-and-sweep based on its reachability status * (presumably not reachable because refcount is 0). */ } DUK_ASSERT_DISABLE(DUK_HEAPHDR_GET_REFCOUNT(h) >= 0); /* Unsigned. */ } DUK_LOCAL void duk__assert_valid_refcounts(duk_heap *heap) { duk__assert_walk_list(heap, heap->heap_allocated, duk__assert_valid_refcounts_cb); } DUK_LOCAL void duk__clear_assert_refcounts_cb1(duk_heap *heap, duk_heaphdr *h) { DUK_UNREF(heap); h->h_assert_refcount = 0; } DUK_LOCAL void duk__clear_assert_refcounts_cb2(duk_heap *heap, duk_hstring *h) { DUK_UNREF(heap); ((duk_heaphdr *) h)->h_assert_refcount = 0; } DUK_LOCAL void duk__clear_assert_refcounts(duk_heap *heap) { duk__assert_walk_list(heap, heap->heap_allocated, duk__clear_assert_refcounts_cb1); #if defined(DUK_USE_FINALIZER_SUPPORT) duk__assert_walk_list(heap, heap->finalize_list, duk__clear_assert_refcounts_cb1); #endif #if defined(DUK_USE_REFERENCE_COUNTING) duk__assert_walk_list(heap, heap->refzero_list, duk__clear_assert_refcounts_cb1); #endif duk__assert_walk_strtable(heap, duk__clear_assert_refcounts_cb2); } DUK_LOCAL void duk__check_refcount_heaphdr(duk_heaphdr *hdr) { duk_bool_t count_ok; duk_size_t expect_refc; /* The refcount check only makes sense for reachable objects on * heap_allocated or string table, after the sweep phase. Prior to * sweep phase refcounts will include references that are not visible * via reachability roots. * * Because we're called after the sweep phase, all heap objects on * heap_allocated are reachable. REACHABLE flags have already been * cleared so we can't check them. */ /* ROM objects have intentionally incorrect refcount (1), but we won't * check them. */ DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY(hdr)); expect_refc = hdr->h_assert_refcount; if (DUK_HEAPHDR_IS_STRING(hdr) && DUK_HSTRING_HAS_PINNED_LITERAL((duk_hstring *) hdr)) { expect_refc++; } count_ok = ((duk_size_t) DUK_HEAPHDR_GET_REFCOUNT(hdr) == expect_refc); if (!count_ok) { DUK_D(DUK_DPRINT("refcount mismatch for: %p: header=%ld counted=%ld --> %!iO", (void *) hdr, (long) DUK_HEAPHDR_GET_REFCOUNT(hdr), (long) hdr->h_assert_refcount, hdr)); DUK_ASSERT(0); } } DUK_LOCAL void duk__check_assert_refcounts_cb1(duk_heap *heap, duk_heaphdr *h) { DUK_UNREF(heap); duk__check_refcount_heaphdr(h); } DUK_LOCAL void duk__check_assert_refcounts_cb2(duk_heap *heap, duk_hstring *h) { DUK_UNREF(heap); duk__check_refcount_heaphdr((duk_heaphdr *) h); } DUK_LOCAL void duk__check_assert_refcounts(duk_heap *heap) { duk__assert_walk_list(heap, heap->heap_allocated, duk__check_assert_refcounts_cb1); #if defined(DUK_USE_FINALIZER_SUPPORT) duk__assert_walk_list(heap, heap->finalize_list, duk__check_assert_refcounts_cb1); #endif /* XXX: Assert anything for refzero_list? */ duk__assert_walk_strtable(heap, duk__check_assert_refcounts_cb2); } #endif /* DUK_USE_REFERENCE_COUNTING */ #if defined(DUK_USE_LITCACHE_SIZE) DUK_LOCAL void duk__assert_litcache_nulls(duk_heap *heap) { duk_uint_t i; duk_litcache_entry *e; e = heap->litcache; for (i = 0; i < DUK_USE_LITCACHE_SIZE; i++) { /* Entry addresses were NULLed before mark-and-sweep, check * that they're still NULL afterwards to ensure no pointers * were recorded through any side effects. */ DUK_ASSERT(e->addr == NULL); } } #endif /* DUK_USE_LITCACHE_SIZE */ #endif /* DUK_USE_ASSERTIONS */ /* * Stats dump. */ #if defined(DUK_USE_DEBUG) DUK_LOCAL void duk__dump_stats(duk_heap *heap) { DUK_D(DUK_DPRINT("stats executor: opcodes=%ld, interrupt=%ld, throw=%ld", (long) heap->stats_exec_opcodes, (long) heap->stats_exec_interrupt, (long) heap->stats_exec_throw)); DUK_D(DUK_DPRINT("stats call: all=%ld, tailcall=%ld, ecmatoecma=%ld", (long) heap->stats_call_all, (long) heap->stats_call_tailcall, (long) heap->stats_call_ecmatoecma)); DUK_D(DUK_DPRINT("stats safecall: all=%ld, nothrow=%ld, throw=%ld", (long) heap->stats_safecall_all, (long) heap->stats_safecall_nothrow, (long) heap->stats_safecall_throw)); DUK_D(DUK_DPRINT("stats mark-and-sweep: try_count=%ld, skip_count=%ld, emergency_count=%ld", (long) heap->stats_ms_try_count, (long) heap->stats_ms_skip_count, (long) heap->stats_ms_emergency_count)); DUK_D(DUK_DPRINT("stats stringtable: intern_hit=%ld, intern_miss=%ld, " "resize_check=%ld, resize_grow=%ld, resize_shrink=%ld, " "litcache_hit=%ld, litcache_miss=%ld, litcache_pin=%ld", (long) heap->stats_strtab_intern_hit, (long) heap->stats_strtab_intern_miss, (long) heap->stats_strtab_resize_check, (long) heap->stats_strtab_resize_grow, (long) heap->stats_strtab_resize_shrink, (long) heap->stats_strtab_litcache_hit, (long) heap->stats_strtab_litcache_miss, (long) heap->stats_strtab_litcache_pin)); DUK_D(DUK_DPRINT("stats object: realloc_props=%ld, abandon_array=%ld", (long) heap->stats_object_realloc_props, (long) heap->stats_object_abandon_array)); DUK_D(DUK_DPRINT("stats getownpropdesc: count=%ld, hit=%ld, miss=%ld", (long) heap->stats_getownpropdesc_count, (long) heap->stats_getownpropdesc_hit, (long) heap->stats_getownpropdesc_miss)); DUK_D(DUK_DPRINT("stats getpropdesc: count=%ld, hit=%ld, miss=%ld", (long) heap->stats_getpropdesc_count, (long) heap->stats_getpropdesc_hit, (long) heap->stats_getpropdesc_miss)); DUK_D(DUK_DPRINT("stats getprop: all=%ld, arrayidx=%ld, bufobjidx=%ld, " "bufferidx=%ld, bufferlen=%ld, stringidx=%ld, stringlen=%ld, " "proxy=%ld, arguments=%ld", (long) heap->stats_getprop_all, (long) heap->stats_getprop_arrayidx, (long) heap->stats_getprop_bufobjidx, (long) heap->stats_getprop_bufferidx, (long) heap->stats_getprop_bufferlen, (long) heap->stats_getprop_stringidx, (long) heap->stats_getprop_stringlen, (long) heap->stats_getprop_proxy, (long) heap->stats_getprop_arguments)); DUK_D(DUK_DPRINT("stats putprop: all=%ld, arrayidx=%ld, bufobjidx=%ld, " "bufferidx=%ld, proxy=%ld", (long) heap->stats_putprop_all, (long) heap->stats_putprop_arrayidx, (long) heap->stats_putprop_bufobjidx, (long) heap->stats_putprop_bufferidx, (long) heap->stats_putprop_proxy)); DUK_D(DUK_DPRINT("stats getvar: all=%ld", (long) heap->stats_getvar_all)); DUK_D(DUK_DPRINT("stats putvar: all=%ld", (long) heap->stats_putvar_all)); DUK_D(DUK_DPRINT("stats envrec: delayedcreate=%ld, create=%ld, newenv=%ld, oldenv=%ld, pushclosure=%ld", (long) heap->stats_envrec_delayedcreate, (long) heap->stats_envrec_create, (long) heap->stats_envrec_newenv, (long) heap->stats_envrec_oldenv, (long) heap->stats_envrec_pushclosure)); } #endif /* DUK_USE_DEBUG */ /* * Main mark-and-sweep function. * * 'flags' represents the features requested by the caller. The current * heap->ms_base_flags is ORed automatically into the flags; the base flags * mask typically prevents certain mark-and-sweep operation to avoid trouble. */ DUK_INTERNAL void duk_heap_mark_and_sweep(duk_heap *heap, duk_small_uint_t flags) { duk_size_t count_keep_obj; duk_size_t count_keep_str; #if defined(DUK_USE_VOLUNTARY_GC) duk_size_t tmp; #endif DUK_STATS_INC(heap, stats_ms_try_count); #if defined(DUK_USE_DEBUG) if (flags & DUK_MS_FLAG_EMERGENCY) { DUK_STATS_INC(heap, stats_ms_emergency_count); } #endif /* If debugger is paused, garbage collection is disabled by default. * This is achieved by bumping ms_prevent_count when becoming paused. */ DUK_ASSERT(!DUK_HEAP_HAS_DEBUGGER_PAUSED(heap) || heap->ms_prevent_count > 0); /* Prevention/recursion check as soon as possible because we may * be called a number of times when voluntary mark-and-sweep is * pending. */ if (heap->ms_prevent_count != 0) { DUK_DD(DUK_DDPRINT("reject recursive mark-and-sweep")); DUK_STATS_INC(heap, stats_ms_skip_count); return; } DUK_ASSERT(heap->ms_running == 0); /* ms_prevent_count is bumped when ms_running is set */ /* Heap_thread is used during mark-and-sweep for refcount finalization * (it's also used for finalizer execution once mark-and-sweep is * complete). Heap allocation code ensures heap_thread is set and * properly initialized before setting ms_prevent_count to 0. */ DUK_ASSERT(heap->heap_thread != NULL); DUK_ASSERT(heap->heap_thread->valstack != NULL); DUK_D(DUK_DPRINT("garbage collect (mark-and-sweep) starting, requested flags: 0x%08lx, effective flags: 0x%08lx", (unsigned long) flags, (unsigned long) (flags | heap->ms_base_flags))); flags |= heap->ms_base_flags; #if defined(DUK_USE_FINALIZER_SUPPORT) if (heap->finalize_list != NULL) { flags |= DUK_MS_FLAG_POSTPONE_RESCUE; } #endif /* * Assertions before */ #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(heap->ms_prevent_count == 0); DUK_ASSERT(heap->ms_running == 0); DUK_ASSERT(!DUK_HEAP_HAS_DEBUGGER_PAUSED(heap)); DUK_ASSERT(!DUK_HEAP_HAS_MARKANDSWEEP_RECLIMIT_REACHED(heap)); DUK_ASSERT(heap->ms_recursion_depth == 0); duk__assert_heaphdr_flags(heap); duk__assert_validity(heap); #if defined(DUK_USE_REFERENCE_COUNTING) /* Note: heap->refzero_free_running may be true; a refcount * finalizer may trigger a mark-and-sweep. */ duk__assert_valid_refcounts(heap); #endif /* DUK_USE_REFERENCE_COUNTING */ #endif /* DUK_USE_ASSERTIONS */ /* * Begin */ DUK_ASSERT(heap->ms_prevent_count == 0); DUK_ASSERT(heap->ms_running == 0); heap->ms_prevent_count = 1; heap->ms_running = 1; /* * Free activation/catcher freelists on every mark-and-sweep for now. * This is an initial rough draft; ideally we'd keep count of the * freelist size and free only excess entries. */ DUK_D(DUK_DPRINT("freeing temporary freelists")); duk_heap_free_freelists(heap); /* * Mark roots, hoping that recursion limit is not normally hit. * If recursion limit is hit, run additional reachability rounds * starting from "temproots" until marking is complete. * * Marking happens in two phases: first we mark actual reachability * roots (and run "temproots" to complete the process). Then we * check which objects are unreachable and are finalizable; such * objects are marked as FINALIZABLE and marked as reachability * (and "temproots" is run again to complete the process). * * The heap finalize_list must also be marked as a reachability root. * There may be objects on the list from a previous round if the * previous run had finalizer skip flag. */ #if defined(DUK_USE_ASSERTIONS) && defined(DUK_USE_REFERENCE_COUNTING) duk__clear_assert_refcounts(heap); #endif #if defined(DUK_USE_LITCACHE_SIZE) duk__wipe_litcache(heap); #endif duk__mark_roots_heap(heap); /* Mark main reachability roots. */ #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(heap->refzero_list == NULL); /* Always handled to completion inline in DECREF. */ #endif duk__mark_temproots_by_heap_scan(heap); /* Temproots. */ #if defined(DUK_USE_FINALIZER_SUPPORT) duk__mark_finalizable(heap); /* Mark finalizable as reachability roots. */ duk__mark_finalize_list(heap); /* Mark finalizer work list as reachability roots. */ #endif duk__mark_temproots_by_heap_scan(heap); /* Temproots. */ /* * Sweep garbage and remove marking flags, and move objects with * finalizers to the finalizer work list. * * Objects to be swept need to get their refcounts finalized before * they are swept. In other words, their target object refcounts * need to be decreased. This has to be done before freeing any * objects to avoid decref'ing dangling pointers (which may happen * even without bugs, e.g. with reference loops) * * Because strings don't point to other heap objects, similar * finalization is not necessary for strings. */ /* XXX: more emergency behavior, e.g. find smaller hash sizes etc */ #if defined(DUK_USE_REFERENCE_COUNTING) duk__finalize_refcounts(heap); #endif duk__sweep_heap(heap, flags, &count_keep_obj); duk__sweep_stringtable(heap, &count_keep_str); #if defined(DUK_USE_ASSERTIONS) && defined(DUK_USE_REFERENCE_COUNTING) duk__check_assert_refcounts(heap); #endif #if defined(DUK_USE_REFERENCE_COUNTING) DUK_ASSERT(heap->refzero_list == NULL); /* Always handled to completion inline in DECREF. */ #endif #if defined(DUK_USE_FINALIZER_SUPPORT) duk__clear_finalize_list_flags(heap); #endif /* * Object compaction (emergency only). * * Object compaction is a separate step after sweeping, as there is * more free memory for it to work with. Also, currently compaction * may insert new objects into the heap allocated list and the string * table which we don't want to do during a sweep (the reachability * flags of such objects would be incorrect). The objects inserted * are currently: * * - a temporary duk_hbuffer for a new properties allocation * - if array part is abandoned, string keys are interned * * The object insertions go to the front of the list, so they do not * cause an infinite loop (they are not compacted). * * At present compaction is not allowed when mark-and-sweep runs * during error handling because it involves a duk_safe_call() * interfering with error state. */ if ((flags & DUK_MS_FLAG_EMERGENCY) && !(flags & DUK_MS_FLAG_NO_OBJECT_COMPACTION)) { if (heap->lj.type != DUK_LJ_TYPE_UNKNOWN) { DUK_D(DUK_DPRINT("lj.type (%ld) not DUK_LJ_TYPE_UNKNOWN, skip object compaction", (long) heap->lj.type)); } else { DUK_D(DUK_DPRINT("object compaction")); duk__compact_objects(heap); } } /* * String table resize check. * * This is mainly useful in emergency GC: if the string table load * factor is really low for some reason, we can shrink the string * table to a smaller size and free some memory in the process. * Only execute in emergency GC. String table has internal flags * to protect against recursive resizing if this mark-and-sweep pass * was triggered by a string table resize. */ if (flags & DUK_MS_FLAG_EMERGENCY) { DUK_D(DUK_DPRINT("stringtable resize check in emergency gc")); duk_heap_strtable_force_resize(heap); } /* * Finish */ DUK_ASSERT(heap->ms_prevent_count == 1); DUK_ASSERT(heap->ms_running == 1); heap->ms_prevent_count = 0; heap->ms_running = 0; /* * Assertions after */ #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(heap->ms_prevent_count == 0); DUK_ASSERT(!DUK_HEAP_HAS_MARKANDSWEEP_RECLIMIT_REACHED(heap)); DUK_ASSERT(heap->ms_recursion_depth == 0); duk__assert_heaphdr_flags(heap); duk__assert_validity(heap); #if defined(DUK_USE_REFERENCE_COUNTING) /* Note: heap->refzero_free_running may be true; a refcount * finalizer may trigger a mark-and-sweep. */ duk__assert_valid_refcounts(heap); #endif /* DUK_USE_REFERENCE_COUNTING */ #if defined(DUK_USE_LITCACHE_SIZE) duk__assert_litcache_nulls(heap); #endif /* DUK_USE_LITCACHE_SIZE */ #endif /* DUK_USE_ASSERTIONS */ /* * Reset trigger counter */ #if defined(DUK_USE_VOLUNTARY_GC) tmp = (count_keep_obj + count_keep_str) / 256; heap->ms_trigger_counter = (duk_int_t) ( (tmp * DUK_HEAP_MARK_AND_SWEEP_TRIGGER_MULT) + DUK_HEAP_MARK_AND_SWEEP_TRIGGER_ADD); DUK_D(DUK_DPRINT("garbage collect (mark-and-sweep) finished: %ld objects kept, %ld strings kept, trigger reset to %ld", (long) count_keep_obj, (long) count_keep_str, (long) heap->ms_trigger_counter)); #else DUK_D(DUK_DPRINT("garbage collect (mark-and-sweep) finished: %ld objects kept, %ld strings kept, no voluntary trigger", (long) count_keep_obj, (long) count_keep_str)); #endif /* * Stats dump */ #if defined(DUK_USE_DEBUG) duk__dump_stats(heap); #endif /* * Finalize objects in the finalization work list. Finalized * objects are queued back to heap_allocated with FINALIZED set. * * Since finalizers may cause arbitrary side effects, they are * prevented e.g. during string table and object property allocation * resizing using heap->pf_prevent_count. In this case the objects * remain in the finalization work list after mark-and-sweep exits * and they may be finalized on the next pass or any DECREF checking * for finalize_list. * * As of Duktape 2.1 finalization happens outside mark-and-sweep * protection. Mark-and-sweep is allowed while the finalize_list * is being processed, but no rescue decisions are done while the * process is on-going. This avoids incorrect rescue decisions * if an object is considered reachable (and thus rescued) because * of a reference via finalize_list (which is considered a reachability * root). When finalize_list is being processed, reachable objects * with FINALIZED set will just keep their FINALIZED flag for later * mark-and-sweep processing. * * This could also be handled (a bit better) by having a more refined * notion of reachability for rescue/free decisions. * * XXX: avoid finalizer execution when doing emergency GC? */ #if defined(DUK_USE_FINALIZER_SUPPORT) /* Attempt to process finalize_list, pf_prevent_count check * is inside the target. */ duk_heap_process_finalize_list(heap); #endif /* DUK_USE_FINALIZER_SUPPORT */ } /* * Memory allocation handling. */ /* #include duk_internal.h -> already included */ /* * Voluntary GC check */ #if defined(DUK_USE_VOLUNTARY_GC) DUK_LOCAL DUK_INLINE void duk__check_voluntary_gc(duk_heap *heap) { if (DUK_UNLIKELY(--(heap)->ms_trigger_counter < 0)) { #if defined(DUK_USE_DEBUG) if (heap->ms_prevent_count == 0) { DUK_D(DUK_DPRINT("triggering voluntary mark-and-sweep")); } else { DUK_DD(DUK_DDPRINT("gc blocked -> skip voluntary mark-and-sweep now")); } #endif /* Prevention checks in the call target handle cases where * voluntary GC is not allowed. The voluntary GC trigger * counter is only rewritten if mark-and-sweep actually runs. */ duk_heap_mark_and_sweep(heap, DUK_MS_FLAG_VOLUNTARY /*flags*/); } } #define DUK__VOLUNTARY_PERIODIC_GC(heap) do { duk__check_voluntary_gc((heap)); } while (0) #else #define DUK__VOLUNTARY_PERIODIC_GC(heap) /* no voluntary gc */ #endif /* DUK_USE_VOLUNTARY_GC */ /* * Allocate memory with garbage collection */ DUK_INTERNAL void *duk_heap_mem_alloc(duk_heap *heap, duk_size_t size) { void *res; duk_small_int_t i; DUK_ASSERT(heap != NULL); DUK_ASSERT_DISABLE(size >= 0); /* * Voluntary periodic GC (if enabled) */ DUK__VOLUNTARY_PERIODIC_GC(heap); /* * First attempt */ #if defined(DUK_USE_GC_TORTURE) /* Simulate alloc failure on every alloc, except when mark-and-sweep * is running. */ if (heap->ms_prevent_count == 0) { DUK_DDD(DUK_DDDPRINT("gc torture enabled, pretend that first alloc attempt fails")); res = NULL; DUK_UNREF(res); goto skip_attempt; } #endif res = heap->alloc_func(heap->heap_udata, size); if (DUK_LIKELY(res || size == 0)) { /* For zero size allocations NULL is allowed. */ return res; } #if defined(DUK_USE_GC_TORTURE) skip_attempt: #endif DUK_D(DUK_DPRINT("first alloc attempt failed, attempt to gc and retry")); #if 0 /* * Avoid a GC if GC is already running. This can happen at a late * stage in a GC when we try to e.g. resize the stringtable * or compact objects. * * NOTE: explicit handling isn't actually be needed: if the GC is * not allowed, duk_heap_mark_and_sweep() will reject it for every * attempt in the loop below, resulting in a NULL same as here. */ if (heap->ms_prevent_count != 0) { DUK_D(DUK_DPRINT("duk_heap_mem_alloc() failed, gc in progress (gc skipped), alloc size %ld", (long) size)); return NULL; } #endif /* * Retry with several GC attempts. Initial attempts are made without * emergency mode; later attempts use emergency mode which minimizes * memory allocations forcibly. */ for (i = 0; i < DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_LIMIT; i++) { duk_small_uint_t flags; flags = 0; if (i >= DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_EMERGENCY_LIMIT - 1) { flags |= DUK_MS_FLAG_EMERGENCY; } duk_heap_mark_and_sweep(heap, flags); res = heap->alloc_func(heap->heap_udata, size); if (res) { DUK_D(DUK_DPRINT("duk_heap_mem_alloc() succeeded after gc (pass %ld), alloc size %ld", (long) (i + 1), (long) size)); return res; } } DUK_D(DUK_DPRINT("duk_heap_mem_alloc() failed even after gc, alloc size %ld", (long) size)); return NULL; } DUK_INTERNAL void *duk_heap_mem_alloc_zeroed(duk_heap *heap, duk_size_t size) { void *res; DUK_ASSERT(heap != NULL); DUK_ASSERT_DISABLE(size >= 0); res = DUK_ALLOC(heap, size); if (DUK_LIKELY(res != NULL)) { duk_memzero(res, size); } return res; } DUK_INTERNAL void *duk_heap_mem_alloc_checked(duk_hthread *thr, duk_size_t size) { void *res; DUK_ASSERT(thr != NULL); res = duk_heap_mem_alloc(thr->heap, size); if (DUK_LIKELY(res != NULL || size == 0)) { return res; } DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return NULL;); } DUK_INTERNAL void *duk_heap_mem_alloc_checked_zeroed(duk_hthread *thr, duk_size_t size) { void *res; DUK_ASSERT(thr != NULL); res = duk_heap_mem_alloc_zeroed(thr->heap, size); if (DUK_LIKELY(res != NULL || size == 0)) { return res; } DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return NULL;); } /* * Reallocate memory with garbage collection */ DUK_INTERNAL void *duk_heap_mem_realloc(duk_heap *heap, void *ptr, duk_size_t newsize) { void *res; duk_small_int_t i; DUK_ASSERT(heap != NULL); /* ptr may be NULL */ DUK_ASSERT_DISABLE(newsize >= 0); /* * Voluntary periodic GC (if enabled) */ DUK__VOLUNTARY_PERIODIC_GC(heap); /* * First attempt */ #if defined(DUK_USE_GC_TORTURE) /* Simulate alloc failure on every realloc, except when mark-and-sweep * is running. */ if (heap->ms_prevent_count == 0) { DUK_DDD(DUK_DDDPRINT("gc torture enabled, pretend that first realloc attempt fails")); res = NULL; DUK_UNREF(res); goto skip_attempt; } #endif res = heap->realloc_func(heap->heap_udata, ptr, newsize); if (DUK_LIKELY(res || newsize == 0)) { /* For zero size allocations NULL is allowed. */ return res; } #if defined(DUK_USE_GC_TORTURE) skip_attempt: #endif DUK_D(DUK_DPRINT("first realloc attempt failed, attempt to gc and retry")); #if 0 /* * Avoid a GC if GC is already running. See duk_heap_mem_alloc(). */ if (heap->ms_prevent_count != 0) { DUK_D(DUK_DPRINT("duk_heap_mem_realloc() failed, gc in progress (gc skipped), alloc size %ld", (long) newsize)); return NULL; } #endif /* * Retry with several GC attempts. Initial attempts are made without * emergency mode; later attempts use emergency mode which minimizes * memory allocations forcibly. */ for (i = 0; i < DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_LIMIT; i++) { duk_small_uint_t flags; flags = 0; if (i >= DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_EMERGENCY_LIMIT - 1) { flags |= DUK_MS_FLAG_EMERGENCY; } duk_heap_mark_and_sweep(heap, flags); res = heap->realloc_func(heap->heap_udata, ptr, newsize); if (res || newsize == 0) { DUK_D(DUK_DPRINT("duk_heap_mem_realloc() succeeded after gc (pass %ld), alloc size %ld", (long) (i + 1), (long) newsize)); return res; } } DUK_D(DUK_DPRINT("duk_heap_mem_realloc() failed even after gc, alloc size %ld", (long) newsize)); return NULL; } /* * Reallocate memory with garbage collection, using a callback to provide * the current allocated pointer. This variant is used when a mark-and-sweep * (e.g. finalizers) might change the original pointer. */ DUK_INTERNAL void *duk_heap_mem_realloc_indirect(duk_heap *heap, duk_mem_getptr cb, void *ud, duk_size_t newsize) { void *res; duk_small_int_t i; DUK_ASSERT(heap != NULL); DUK_ASSERT_DISABLE(newsize >= 0); /* * Voluntary periodic GC (if enabled) */ DUK__VOLUNTARY_PERIODIC_GC(heap); /* * First attempt */ #if defined(DUK_USE_GC_TORTURE) /* Simulate alloc failure on every realloc, except when mark-and-sweep * is running. */ if (heap->ms_prevent_count == 0) { DUK_DDD(DUK_DDDPRINT("gc torture enabled, pretend that first indirect realloc attempt fails")); res = NULL; DUK_UNREF(res); goto skip_attempt; } #endif res = heap->realloc_func(heap->heap_udata, cb(heap, ud), newsize); if (DUK_LIKELY(res || newsize == 0)) { /* For zero size allocations NULL is allowed. */ return res; } #if defined(DUK_USE_GC_TORTURE) skip_attempt: #endif DUK_D(DUK_DPRINT("first indirect realloc attempt failed, attempt to gc and retry")); #if 0 /* * Avoid a GC if GC is already running. See duk_heap_mem_alloc(). */ if (heap->ms_prevent_count != 0) { DUK_D(DUK_DPRINT("duk_heap_mem_realloc_indirect() failed, gc in progress (gc skipped), alloc size %ld", (long) newsize)); return NULL; } #endif /* * Retry with several GC attempts. Initial attempts are made without * emergency mode; later attempts use emergency mode which minimizes * memory allocations forcibly. */ for (i = 0; i < DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_LIMIT; i++) { duk_small_uint_t flags; #if defined(DUK_USE_DEBUG) void *ptr_pre; void *ptr_post; #endif #if defined(DUK_USE_DEBUG) ptr_pre = cb(heap, ud); #endif flags = 0; if (i >= DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_EMERGENCY_LIMIT - 1) { flags |= DUK_MS_FLAG_EMERGENCY; } duk_heap_mark_and_sweep(heap, flags); #if defined(DUK_USE_DEBUG) ptr_post = cb(heap, ud); if (ptr_pre != ptr_post) { DUK_DD(DUK_DDPRINT("realloc base pointer changed by mark-and-sweep: %p -> %p", (void *) ptr_pre, (void *) ptr_post)); } #endif /* Note: key issue here is to re-lookup the base pointer on every attempt. * The pointer being reallocated may change after every mark-and-sweep. */ res = heap->realloc_func(heap->heap_udata, cb(heap, ud), newsize); if (res || newsize == 0) { DUK_D(DUK_DPRINT("duk_heap_mem_realloc_indirect() succeeded after gc (pass %ld), alloc size %ld", (long) (i + 1), (long) newsize)); return res; } } DUK_D(DUK_DPRINT("duk_heap_mem_realloc_indirect() failed even after gc, alloc size %ld", (long) newsize)); return NULL; } /* * Free memory */ DUK_INTERNAL void duk_heap_mem_free(duk_heap *heap, void *ptr) { DUK_ASSERT(heap != NULL); /* ptr may be NULL */ /* Must behave like a no-op with NULL and any pointer returned from * malloc/realloc with zero size. */ heap->free_func(heap->heap_udata, ptr); /* Never perform a GC (even voluntary) in a memory free, otherwise * all call sites doing frees would need to deal with the side effects. * No need to update voluntary GC counter either. */ } /* automatic undefs */ #undef DUK__VOLUNTARY_PERIODIC_GC /* * Support functions for duk_heap. */ /* #include duk_internal.h -> already included */ DUK_INTERNAL void duk_heap_insert_into_heap_allocated(duk_heap *heap, duk_heaphdr *hdr) { duk_heaphdr *root; DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(hdr) != DUK_HTYPE_STRING); root = heap->heap_allocated; #if defined(DUK_USE_DOUBLE_LINKED_HEAP) if (root != NULL) { DUK_ASSERT(DUK_HEAPHDR_GET_PREV(heap, root) == NULL); DUK_HEAPHDR_SET_PREV(heap, root, hdr); } DUK_HEAPHDR_SET_PREV(heap, hdr, NULL); #endif DUK_HEAPHDR_SET_NEXT(heap, hdr, root); DUK_HEAPHDR_ASSERT_LINKS(heap, hdr); DUK_HEAPHDR_ASSERT_LINKS(heap, root); heap->heap_allocated = hdr; } #if defined(DUK_USE_REFERENCE_COUNTING) DUK_INTERNAL void duk_heap_remove_from_heap_allocated(duk_heap *heap, duk_heaphdr *hdr) { duk_heaphdr *prev; duk_heaphdr *next; /* Strings are in string table. */ DUK_ASSERT(hdr != NULL); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(hdr) != DUK_HTYPE_STRING); /* Target 'hdr' must be in heap_allocated (not e.g. finalize_list). * If not, heap lists will become corrupted so assert early for it. */ #if defined(DUK_USE_ASSERTIONS) { duk_heaphdr *tmp; for (tmp = heap->heap_allocated; tmp != NULL; tmp = DUK_HEAPHDR_GET_NEXT(heap, tmp)) { if (tmp == hdr) { break; } } DUK_ASSERT(tmp == hdr); } #endif /* Read/write only once to minimize pointer compression calls. */ prev = DUK_HEAPHDR_GET_PREV(heap, hdr); next = DUK_HEAPHDR_GET_NEXT(heap, hdr); if (prev != NULL) { DUK_ASSERT(heap->heap_allocated != hdr); DUK_HEAPHDR_SET_NEXT(heap, prev, next); } else { DUK_ASSERT(heap->heap_allocated == hdr); heap->heap_allocated = next; } if (next != NULL) { DUK_HEAPHDR_SET_PREV(heap, next, prev); } else { ; } } #endif /* DUK_USE_REFERENCE_COUNTING */ #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_INTERNAL void duk_heap_insert_into_finalize_list(duk_heap *heap, duk_heaphdr *hdr) { duk_heaphdr *root; root = heap->finalize_list; #if defined(DUK_USE_DOUBLE_LINKED_HEAP) DUK_HEAPHDR_SET_PREV(heap, hdr, NULL); if (root != NULL) { DUK_ASSERT(DUK_HEAPHDR_GET_PREV(heap, root) == NULL); DUK_HEAPHDR_SET_PREV(heap, root, hdr); } #endif DUK_HEAPHDR_SET_NEXT(heap, hdr, root); DUK_HEAPHDR_ASSERT_LINKS(heap, hdr); DUK_HEAPHDR_ASSERT_LINKS(heap, root); heap->finalize_list = hdr; } #endif /* DUK_USE_FINALIZER_SUPPORT */ #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_INTERNAL void duk_heap_remove_from_finalize_list(duk_heap *heap, duk_heaphdr *hdr) { #if defined(DUK_USE_DOUBLE_LINKED_HEAP) duk_heaphdr *next; duk_heaphdr *prev; next = DUK_HEAPHDR_GET_NEXT(heap, hdr); prev = DUK_HEAPHDR_GET_PREV(heap, hdr); if (next != NULL) { DUK_ASSERT(DUK_HEAPHDR_GET_PREV(heap, next) == hdr); DUK_HEAPHDR_SET_PREV(heap, next, prev); } if (prev == NULL) { DUK_ASSERT(hdr == heap->finalize_list); heap->finalize_list = next; } else { DUK_ASSERT(hdr != heap->finalize_list); DUK_HEAPHDR_SET_NEXT(heap, prev, next); } #else duk_heaphdr *next; duk_heaphdr *curr; /* Random removal is expensive: we need to locate the previous element * because we don't have a 'prev' pointer. */ curr = heap->finalize_list; if (curr == hdr) { heap->finalize_list = DUK_HEAPHDR_GET_NEXT(heap, curr); } else { DUK_ASSERT(hdr != heap->finalize_list); for (;;) { DUK_ASSERT(curr != NULL); /* Caller responsibility. */ next = DUK_HEAPHDR_GET_NEXT(heap, curr); if (next == hdr) { next = DUK_HEAPHDR_GET_NEXT(heap, hdr); DUK_HEAPHDR_SET_NEXT(heap, curr, next); break; } } } #endif } #endif /* DUK_USE_FINALIZER_SUPPORT */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL duk_bool_t duk_heap_in_heap_allocated(duk_heap *heap, duk_heaphdr *ptr) { duk_heaphdr *curr; DUK_ASSERT(heap != NULL); for (curr = heap->heap_allocated; curr != NULL; curr = DUK_HEAPHDR_GET_NEXT(heap, curr)) { if (curr == ptr) { return 1; } } return 0; } #endif /* DUK_USE_ASSERTIONS */ #if defined(DUK_USE_INTERRUPT_COUNTER) DUK_INTERNAL void duk_heap_switch_thread(duk_heap *heap, duk_hthread *new_thr) { duk_hthread *curr_thr; DUK_ASSERT(heap != NULL); if (new_thr != NULL) { curr_thr = heap->curr_thread; if (curr_thr == NULL) { /* For initial entry use default value; zero forces an * interrupt before executing the first insturction. */ DUK_DD(DUK_DDPRINT("switch thread, initial entry, init default interrupt counter")); new_thr->interrupt_counter = 0; new_thr->interrupt_init = 0; } else { /* Copy interrupt counter/init value state to new thread (if any). * It's OK for new_thr to be the same as curr_thr. */ #if defined(DUK_USE_DEBUG) if (new_thr != curr_thr) { DUK_DD(DUK_DDPRINT("switch thread, not initial entry, copy interrupt counter")); } #endif new_thr->interrupt_counter = curr_thr->interrupt_counter; new_thr->interrupt_init = curr_thr->interrupt_init; } } else { DUK_DD(DUK_DDPRINT("switch thread, new thread is NULL, no interrupt counter changes")); } heap->curr_thread = new_thr; /* may be NULL */ } #endif /* DUK_USE_INTERRUPT_COUNTER */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL void duk_heap_assert_valid(duk_heap *heap) { DUK_ASSERT(heap != NULL); } #endif /* * Reference counting implementation. * * INCREF/DECREF, finalization and freeing of objects whose refcount reaches * zero (refzero). These operations are very performance sensitive, so * various small tricks are used in an attempt to maximize speed. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_REFERENCE_COUNTING) #if !defined(DUK_USE_DOUBLE_LINKED_HEAP) #error internal error, reference counting requires a double linked heap #endif /* * Heap object refcount finalization. * * When an object is about to be freed, all other objects it refers to must * be decref'd. Refcount finalization does NOT free the object or its inner * allocations (mark-and-sweep shares these helpers), it just manipulates * the refcounts. * * Note that any of the DECREFs may cause a refcount to drop to zero. If so, * the object won't be refzero processed inline, but will just be queued to * refzero_list and processed by an earlier caller working on refzero_list, * eliminating C recursion from even long refzero cascades. If refzero * finalization is triggered by mark-and-sweep, refzero conditions are ignored * (objects are not even queued to refzero_list) because mark-and-sweep deals * with them; refcounts are still updated so that they remain in sync with * actual references. */ DUK_LOCAL void duk__decref_tvals_norz(duk_hthread *thr, duk_tval *tv, duk_idx_t count) { DUK_ASSERT(count == 0 || tv != NULL); while (count-- > 0) { DUK_TVAL_DECREF_NORZ(thr, tv); tv++; } } DUK_INTERNAL void duk_hobject_refcount_finalize_norz(duk_heap *heap, duk_hobject *h) { duk_hthread *thr; duk_uint_fast32_t i; duk_uint_fast32_t n; duk_propvalue *p_val; duk_tval *p_tv; duk_hstring **p_key; duk_uint8_t *p_flag; duk_hobject *h_proto; DUK_ASSERT(heap != NULL); DUK_ASSERT(heap->heap_thread != NULL); DUK_ASSERT(h); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h) == DUK_HTYPE_OBJECT); thr = heap->heap_thread; DUK_ASSERT(thr != NULL); p_key = DUK_HOBJECT_E_GET_KEY_BASE(heap, h); p_val = DUK_HOBJECT_E_GET_VALUE_BASE(heap, h); p_flag = DUK_HOBJECT_E_GET_FLAGS_BASE(heap, h); n = DUK_HOBJECT_GET_ENEXT(h); while (n-- > 0) { duk_hstring *key; key = p_key[n]; if (DUK_UNLIKELY(key == NULL)) { continue; } DUK_HSTRING_DECREF_NORZ(thr, key); if (DUK_UNLIKELY(p_flag[n] & DUK_PROPDESC_FLAG_ACCESSOR)) { duk_hobject *h_getset; h_getset = p_val[n].a.get; DUK_ASSERT(h_getset == NULL || DUK_HEAPHDR_IS_OBJECT((duk_heaphdr *) h_getset)); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, h_getset); h_getset = p_val[n].a.set; DUK_ASSERT(h_getset == NULL || DUK_HEAPHDR_IS_OBJECT((duk_heaphdr *) h_getset)); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, h_getset); } else { duk_tval *tv_val; tv_val = &p_val[n].v; DUK_TVAL_DECREF_NORZ(thr, tv_val); } } p_tv = DUK_HOBJECT_A_GET_BASE(heap, h); n = DUK_HOBJECT_GET_ASIZE(h); while (n-- > 0) { duk_tval *tv_val; tv_val = p_tv + n; DUK_TVAL_DECREF_NORZ(thr, tv_val); } /* Hash part is a 'weak reference' and doesn't contribute to refcounts. */ h_proto = (duk_hobject *) DUK_HOBJECT_GET_PROTOTYPE(heap, h); DUK_ASSERT(h_proto == NULL || DUK_HEAPHDR_IS_OBJECT((duk_heaphdr *) h_proto)); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, h_proto); /* XXX: Object subclass tests are quite awkward at present, ideally * we should be able to switch-case here with a dense index (subtype * number or something). For now, fast path plain objects and arrays * and bit test the rest individually. */ if (DUK_HOBJECT_HAS_FASTREFS(h)) { /* Plain object or array, nothing more to do. While a * duk_harray has additional fields, none of them need * DECREF updates. */ DUK_ASSERT(DUK_HOBJECT_ALLOWS_FASTREFS(h)); return; } DUK_ASSERT(DUK_HOBJECT_PROHIBITS_FASTREFS(h)); /* Slow path: special object, start bit checks from most likely. */ /* XXX: reorg, more common first */ if (DUK_HOBJECT_IS_COMPFUNC(h)) { duk_hcompfunc *f = (duk_hcompfunc *) h; duk_tval *tv, *tv_end; duk_hobject **funcs, **funcs_end; DUK_HCOMPFUNC_ASSERT_VALID(f); if (DUK_LIKELY(DUK_HCOMPFUNC_GET_DATA(heap, f) != NULL)) { tv = DUK_HCOMPFUNC_GET_CONSTS_BASE(heap, f); tv_end = DUK_HCOMPFUNC_GET_CONSTS_END(heap, f); while (tv < tv_end) { DUK_TVAL_DECREF_NORZ(thr, tv); tv++; } funcs = DUK_HCOMPFUNC_GET_FUNCS_BASE(heap, f); funcs_end = DUK_HCOMPFUNC_GET_FUNCS_END(heap, f); while (funcs < funcs_end) { duk_hobject *h_func; h_func = *funcs; DUK_ASSERT(h_func != NULL); DUK_ASSERT(DUK_HEAPHDR_IS_OBJECT((duk_heaphdr *) h_func)); DUK_HCOMPFUNC_DECREF_NORZ(thr, (duk_hcompfunc *) h_func); funcs++; } } else { /* May happen in some out-of-memory corner cases. */ DUK_D(DUK_DPRINT("duk_hcompfunc 'data' is NULL, skipping decref")); } DUK_HEAPHDR_DECREF_ALLOWNULL(thr, (duk_heaphdr *) DUK_HCOMPFUNC_GET_LEXENV(heap, f)); DUK_HEAPHDR_DECREF_ALLOWNULL(thr, (duk_heaphdr *) DUK_HCOMPFUNC_GET_VARENV(heap, f)); DUK_HEAPHDR_DECREF_ALLOWNULL(thr, (duk_hbuffer *) DUK_HCOMPFUNC_GET_DATA(heap, f)); } else if (DUK_HOBJECT_IS_DECENV(h)) { duk_hdecenv *e = (duk_hdecenv *) h; DUK_HDECENV_ASSERT_VALID(e); DUK_HTHREAD_DECREF_NORZ_ALLOWNULL(thr, e->thread); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, e->varmap); } else if (DUK_HOBJECT_IS_OBJENV(h)) { duk_hobjenv *e = (duk_hobjenv *) h; DUK_HOBJENV_ASSERT_VALID(e); DUK_ASSERT(e->target != NULL); /* Required for object environments. */ DUK_HOBJECT_DECREF_NORZ(thr, e->target); #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) } else if (DUK_HOBJECT_IS_BUFOBJ(h)) { duk_hbufobj *b = (duk_hbufobj *) h; DUK_HBUFOBJ_ASSERT_VALID(b); DUK_HBUFFER_DECREF_NORZ_ALLOWNULL(thr, (duk_hbuffer *) b->buf); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, (duk_hobject *) b->buf_prop); #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ } else if (DUK_HOBJECT_IS_BOUNDFUNC(h)) { duk_hboundfunc *f = (duk_hboundfunc *) (void *) h; DUK_HBOUNDFUNC_ASSERT_VALID(f); DUK_TVAL_DECREF_NORZ(thr, &f->target); DUK_TVAL_DECREF_NORZ(thr, &f->this_binding); duk__decref_tvals_norz(thr, f->args, f->nargs); #if defined(DUK_USE_ES6_PROXY) } else if (DUK_HOBJECT_IS_PROXY(h)) { duk_hproxy *p = (duk_hproxy *) h; DUK_HPROXY_ASSERT_VALID(p); DUK_HOBJECT_DECREF_NORZ(thr, p->target); DUK_HOBJECT_DECREF_NORZ(thr, p->handler); #endif /* DUK_USE_ES6_PROXY */ } else if (DUK_HOBJECT_IS_THREAD(h)) { duk_hthread *t = (duk_hthread *) h; duk_activation *act; duk_tval *tv; DUK_HTHREAD_ASSERT_VALID(t); tv = t->valstack; while (tv < t->valstack_top) { DUK_TVAL_DECREF_NORZ(thr, tv); tv++; } for (act = t->callstack_curr; act != NULL; act = act->parent) { DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, (duk_hobject *) DUK_ACT_GET_FUNC(act)); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, (duk_hobject *) act->var_env); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, (duk_hobject *) act->lex_env); #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, (duk_hobject *) act->prev_caller); #endif #if 0 /* nothing now */ for (cat = act->cat; cat != NULL; cat = cat->parent) { } #endif } for (i = 0; i < DUK_NUM_BUILTINS; i++) { DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, (duk_hobject *) t->builtins[i]); } DUK_HTHREAD_DECREF_NORZ_ALLOWNULL(thr, (duk_hthread *) t->resumer); } else { /* We may come here if the object should have a FASTREFS flag * but it's missing for some reason. Assert for never getting * here; however, other than performance, this is harmless. */ DUK_D(DUK_DPRINT("missing FASTREFS flag for: %!iO", h)); DUK_ASSERT(0); } } DUK_INTERNAL void duk_heaphdr_refcount_finalize_norz(duk_heap *heap, duk_heaphdr *hdr) { DUK_ASSERT(heap != NULL); DUK_ASSERT(heap->heap_thread != NULL); DUK_ASSERT(hdr != NULL); if (DUK_HEAPHDR_IS_OBJECT(hdr)) { duk_hobject_refcount_finalize_norz(heap, (duk_hobject *) hdr); } /* DUK_HTYPE_BUFFER: nothing to finalize */ /* DUK_HTYPE_STRING: nothing to finalize */ } /* * Refzero processing for duk_hobject: queue a refzero'ed object to either * finalize_list or refzero_list and process the relevent list(s) if * necessary. * * Refzero_list is single linked, with only 'prev' pointers set and valid. * All 'next' pointers are intentionally left as garbage. This doesn't * matter because refzero_list is processed to completion before any other * code (like mark-and-sweep) might walk the list. * * In more detail: * * - On first insert refzero_list is NULL and the new object becomes the * first and only element on the list; duk__refcount_free_pending() is * called and it starts processing the list from the initial element, * i.e. the list tail. * * - As each object is refcount finalized, new objects may be queued to * refzero_list head. Their 'next' pointers are left as garbage, but * 'prev' points are set correctly, with the element at refzero_list * having a NULL 'prev' pointer. The fact that refzero_list is non-NULL * is used to reject (1) recursive duk__refcount_free_pending() and * (2) finalize_list processing calls. * * - When we're done with the current object, read its 'prev' pointer and * free the object. If 'prev' is NULL, we've reached head of list and are * done: set refzero_list to NULL and process pending finalizers. Otherwise * continue processing the list. * * A refzero cascade is free of side effects because it only involves * queueing more objects and freeing memory; finalizer execution is blocked * in the code path queueing objects to finalize_list. As a result the * initial refzero call (which triggers duk__refcount_free_pending()) must * check finalize_list so that finalizers are executed snappily. * * If finalize_list processing starts first, refzero may occur while we're * processing finalizers. That's fine: that particular refzero cascade is * handled to completion without side effects. Once the cascade is complete, * we'll run pending finalizers but notice that we're already doing that and * return. * * This could be expanded to allow incremental freeing: just bail out * early and resume at a future alloc/decref/refzero. However, if that * were done, the list structure would need to be kept consistent at all * times, mark-and-sweep would need to handle refzero_list, etc. */ DUK_LOCAL void duk__refcount_free_pending(duk_heap *heap) { duk_heaphdr *curr; #if defined(DUK_USE_DEBUG) duk_int_t count = 0; #endif DUK_ASSERT(heap != NULL); curr = heap->refzero_list; DUK_ASSERT(curr != NULL); DUK_ASSERT(DUK_HEAPHDR_GET_PREV(heap, curr) == NULL); /* We're called on initial insert only. */ /* curr->next is GARBAGE. */ do { duk_heaphdr *prev; DUK_DDD(DUK_DDDPRINT("refzero processing %p: %!O", (void *) curr, (duk_heaphdr *) curr)); #if defined(DUK_USE_DEBUG) count++; #endif DUK_ASSERT(curr != NULL); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT); /* currently, always the case */ /* FINALIZED may be set; don't care about flags here. */ /* Refcount finalize 'curr'. Refzero_list must be non-NULL * here to prevent recursive entry to duk__refcount_free_pending(). */ DUK_ASSERT(heap->refzero_list != NULL); duk_hobject_refcount_finalize_norz(heap, (duk_hobject *) curr); prev = DUK_HEAPHDR_GET_PREV(heap, curr); DUK_ASSERT((prev == NULL && heap->refzero_list == curr) || \ (prev != NULL && heap->refzero_list != curr)); /* prev->next is intentionally not updated and is garbage. */ duk_free_hobject(heap, (duk_hobject *) curr); /* Invalidates 'curr'. */ curr = prev; } while (curr != NULL); heap->refzero_list = NULL; DUK_DD(DUK_DDPRINT("refzero processed %ld objects", (long) count)); } DUK_LOCAL DUK_INLINE void duk__refcount_refzero_hobject(duk_heap *heap, duk_hobject *obj, duk_bool_t skip_free_pending) { duk_heaphdr *hdr; duk_heaphdr *root; DUK_ASSERT(heap != NULL); DUK_ASSERT(heap->heap_thread != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) obj) == DUK_HTYPE_OBJECT); hdr = (duk_heaphdr *) obj; /* Refzero'd objects must be in heap_allocated. They can't be in * finalize_list because all objects on finalize_list have an * artificial +1 refcount bump. */ #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(duk_heap_in_heap_allocated(heap, (duk_heaphdr *) obj)); #endif DUK_HEAP_REMOVE_FROM_HEAP_ALLOCATED(heap, hdr); #if defined(DUK_USE_FINALIZER_SUPPORT) /* This finalizer check MUST BE side effect free. It should also be * as fast as possible because it's applied to every object freed. */ if (DUK_UNLIKELY(DUK_HOBJECT_HAS_FINALIZER_FAST(heap, (duk_hobject *) hdr) != 0U)) { /* Special case: FINALIZED may be set if mark-and-sweep queued * object for finalization, the finalizer was executed (and * FINALIZED set), mark-and-sweep hasn't yet processed the * object again, but its refcount drops to zero. Free without * running the finalizer again. */ if (DUK_HEAPHDR_HAS_FINALIZED(hdr)) { DUK_D(DUK_DPRINT("refzero'd object has finalizer and FINALIZED is set -> free")); } else { /* Set FINALIZABLE flag so that all objects on finalize_list * will have it set and are thus detectable based on the * flag alone. */ DUK_HEAPHDR_SET_FINALIZABLE(hdr); DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(hdr)); #if defined(DUK_USE_REFERENCE_COUNTING) /* Bump refcount on finalize_list insert so that a * refzero can never occur when an object is waiting * for its finalizer call. Refzero might otherwise * now happen because we allow duk_push_heapptr() for * objects pending finalization. */ DUK_HEAPHDR_PREINC_REFCOUNT(hdr); #endif DUK_HEAP_INSERT_INTO_FINALIZE_LIST(heap, hdr); /* Process finalizers unless skipping is explicitly * requested (NORZ) or refzero_list is being processed * (avoids side effects during a refzero cascade). * If refzero_list is processed, the initial refzero * call will run pending finalizers when refzero_list * is done. */ if (!skip_free_pending && heap->refzero_list == NULL) { duk_heap_process_finalize_list(heap); } return; } } #endif /* DUK_USE_FINALIZER_SUPPORT */ /* No need to finalize, free object via refzero_list. */ root = heap->refzero_list; DUK_HEAPHDR_SET_PREV(heap, hdr, NULL); /* 'next' is left as GARBAGE. */ heap->refzero_list = hdr; if (root == NULL) { /* Object is now queued. Refzero_list was NULL so * no-one is currently processing it; do it here. * With refzero processing just doing a cascade of * free calls, we can process it directly even when * NORZ macros are used: there are no side effects. */ duk__refcount_free_pending(heap); DUK_ASSERT(heap->refzero_list == NULL); /* Process finalizers only after the entire cascade * is finished. In most cases there's nothing to * finalize, so fast path check to avoid a call. */ #if defined(DUK_USE_FINALIZER_SUPPORT) if (!skip_free_pending && DUK_UNLIKELY(heap->finalize_list != NULL)) { duk_heap_process_finalize_list(heap); } #endif } else { DUK_ASSERT(DUK_HEAPHDR_GET_PREV(heap, root) == NULL); DUK_HEAPHDR_SET_PREV(heap, root, hdr); /* Object is now queued. Because refzero_list was * non-NULL, it's already being processed by someone * in the C call stack, so we're done. */ } } #if defined(DUK_USE_FINALIZER_SUPPORT) DUK_INTERNAL DUK_ALWAYS_INLINE void duk_refzero_check_fast(duk_hthread *thr) { DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(thr->heap->refzero_list == NULL); /* Processed to completion inline. */ if (DUK_UNLIKELY(thr->heap->finalize_list != NULL)) { duk_heap_process_finalize_list(thr->heap); } } DUK_INTERNAL void duk_refzero_check_slow(duk_hthread *thr) { DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(thr->heap->refzero_list == NULL); /* Processed to completion inline. */ if (DUK_UNLIKELY(thr->heap->finalize_list != NULL)) { duk_heap_process_finalize_list(thr->heap); } } #endif /* DUK_USE_FINALIZER_SUPPORT */ /* * Refzero processing for duk_hstring. */ DUK_LOCAL DUK_INLINE void duk__refcount_refzero_hstring(duk_heap *heap, duk_hstring *str) { DUK_ASSERT(heap != NULL); DUK_ASSERT(heap->heap_thread != NULL); DUK_ASSERT(str != NULL); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) str) == DUK_HTYPE_STRING); duk_heap_strcache_string_remove(heap, str); duk_heap_strtable_unlink(heap, str); duk_free_hstring(heap, str); } /* * Refzero processing for duk_hbuffer. */ DUK_LOCAL DUK_INLINE void duk__refcount_refzero_hbuffer(duk_heap *heap, duk_hbuffer *buf) { DUK_ASSERT(heap != NULL); DUK_ASSERT(heap->heap_thread != NULL); DUK_ASSERT(buf != NULL); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) buf) == DUK_HTYPE_BUFFER); DUK_HEAP_REMOVE_FROM_HEAP_ALLOCATED(heap, (duk_heaphdr *) buf); duk_free_hbuffer(heap, buf); } /* * Incref and decref functions. * * Decref may trigger immediate refzero handling, which may free and finalize * an arbitrary number of objects (a "DECREF cascade"). * * Refzero handling is skipped entirely if (1) mark-and-sweep is running or * (2) execution is paused in the debugger. The objects are left in the heap, * and will be freed by mark-and-sweep or eventual heap destruction. * * This is necessary during mark-and-sweep because refcounts are also updated * during the sweep phase (otherwise objects referenced by a swept object * would have incorrect refcounts) which then calls here. This could be * avoided by using separate decref macros in mark-and-sweep; however, * mark-and-sweep also calls finalizers which would use the ordinary decref * macros anyway. * * We can't process refzeros (= free objects) when the debugger is running * as the debugger might make an object unreachable but still continue * inspecting it (or even cause it to be pushed back). So we must rely on * mark-and-sweep to collect them. * * The DUK__RZ_SUPPRESS_CHECK() condition is also used in heap destruction * when running finalizers for remaining objects: the flag prevents objects * from being moved around in heap linked lists while that's being done. * * The suppress condition is important to performance. */ #define DUK__RZ_SUPPRESS_ASSERT1() do { \ DUK_ASSERT(thr != NULL); \ DUK_ASSERT(thr->heap != NULL); \ /* When mark-and-sweep runs, heap_thread must exist. */ \ DUK_ASSERT(thr->heap->ms_running == 0 || thr->heap->heap_thread != NULL); \ /* In normal operation finalizers are executed with ms_running == 0 \ * so we should never see ms_running == 1 and thr != heap_thread. \ * In heap destruction finalizers are executed with ms_running != 0 \ * to e.g. prevent refzero; a special value ms_running == 2 is used \ * in that case so it can be distinguished from the normal runtime \ * case, and allows a stronger assertion here (GH-2030). \ */ \ DUK_ASSERT(!(thr->heap->ms_running == 1 && thr != thr->heap->heap_thread)); \ /* We may be called when the heap is initializing and we process \ * refzeros normally, but mark-and-sweep and finalizers are prevented \ * if that's the case. \ */ \ DUK_ASSERT(thr->heap->heap_initializing == 0 || thr->heap->ms_prevent_count > 0); \ DUK_ASSERT(thr->heap->heap_initializing == 0 || thr->heap->pf_prevent_count > 0); \ } while (0) #if defined(DUK_USE_DEBUGGER_SUPPORT) #define DUK__RZ_SUPPRESS_ASSERT2() do { \ /* When debugger is paused, ms_running is set. */ \ DUK_ASSERT(!DUK_HEAP_HAS_DEBUGGER_PAUSED(thr->heap) || thr->heap->ms_running != 0); \ } while (0) #define DUK__RZ_SUPPRESS_COND() (heap->ms_running != 0) #else #define DUK__RZ_SUPPRESS_ASSERT2() do { } while (0) #define DUK__RZ_SUPPRESS_COND() (heap->ms_running != 0) #endif /* DUK_USE_DEBUGGER_SUPPORT */ #define DUK__RZ_SUPPRESS_CHECK() do { \ DUK__RZ_SUPPRESS_ASSERT1(); \ DUK__RZ_SUPPRESS_ASSERT2(); \ if (DUK_UNLIKELY(DUK__RZ_SUPPRESS_COND())) { \ DUK_DDD(DUK_DDDPRINT("refzero handling suppressed (not even queued) when mark-and-sweep running, object: %p", (void *) h)); \ return; \ } \ } while (0) #define DUK__RZ_STRING() do { \ duk__refcount_refzero_hstring(heap, (duk_hstring *) h); \ } while (0) #define DUK__RZ_BUFFER() do { \ duk__refcount_refzero_hbuffer(heap, (duk_hbuffer *) h); \ } while (0) #define DUK__RZ_OBJECT() do { \ duk__refcount_refzero_hobject(heap, (duk_hobject *) h, skip_free_pending); \ } while (0) /* XXX: test the effect of inlining here vs. NOINLINE in refzero helpers */ #if defined(DUK_USE_FAST_REFCOUNT_DEFAULT) #define DUK__RZ_INLINE DUK_ALWAYS_INLINE #else #define DUK__RZ_INLINE /*nop*/ #endif DUK_LOCAL DUK__RZ_INLINE void duk__hstring_refzero_helper(duk_hthread *thr, duk_hstring *h) { duk_heap *heap; DUK_ASSERT(thr != NULL); DUK_ASSERT(h != NULL); heap = thr->heap; DUK__RZ_SUPPRESS_CHECK(); DUK__RZ_STRING(); } DUK_LOCAL DUK__RZ_INLINE void duk__hbuffer_refzero_helper(duk_hthread *thr, duk_hbuffer *h) { duk_heap *heap; DUK_ASSERT(thr != NULL); DUK_ASSERT(h != NULL); heap = thr->heap; DUK__RZ_SUPPRESS_CHECK(); DUK__RZ_BUFFER(); } DUK_LOCAL DUK__RZ_INLINE void duk__hobject_refzero_helper(duk_hthread *thr, duk_hobject *h, duk_bool_t skip_free_pending) { duk_heap *heap; DUK_ASSERT(thr != NULL); DUK_ASSERT(h != NULL); heap = thr->heap; DUK__RZ_SUPPRESS_CHECK(); DUK__RZ_OBJECT(); } DUK_LOCAL DUK__RZ_INLINE void duk__heaphdr_refzero_helper(duk_hthread *thr, duk_heaphdr *h, duk_bool_t skip_free_pending) { duk_heap *heap; duk_small_uint_t htype; DUK_ASSERT(thr != NULL); DUK_ASSERT(h != NULL); heap = thr->heap; htype = (duk_small_uint_t) DUK_HEAPHDR_GET_TYPE(h); DUK_DDD(DUK_DDDPRINT("ms_running=%ld, heap_thread=%p", (long) thr->heap->ms_running, thr->heap->heap_thread)); DUK__RZ_SUPPRESS_CHECK(); switch (htype) { case DUK_HTYPE_STRING: /* Strings have no internal references but do have "weak" * references in the string cache. Also note that strings * are not on the heap_allocated list like other heap * elements. */ DUK__RZ_STRING(); break; case DUK_HTYPE_OBJECT: /* Objects have internal references. Must finalize through * the "refzero" work list. */ DUK__RZ_OBJECT(); break; default: /* Buffers have no internal references. However, a dynamic * buffer has a separate allocation for the buffer. This is * freed by duk_heap_free_heaphdr_raw(). */ DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(h) == DUK_HTYPE_BUFFER); DUK__RZ_BUFFER(); break; } } DUK_INTERNAL DUK_NOINLINE void duk_heaphdr_refzero(duk_hthread *thr, duk_heaphdr *h) { duk__heaphdr_refzero_helper(thr, h, 0 /*skip_free_pending*/); } DUK_INTERNAL DUK_NOINLINE void duk_heaphdr_refzero_norz(duk_hthread *thr, duk_heaphdr *h) { duk__heaphdr_refzero_helper(thr, h, 1 /*skip_free_pending*/); } DUK_INTERNAL DUK_NOINLINE void duk_hstring_refzero(duk_hthread *thr, duk_hstring *h) { duk__hstring_refzero_helper(thr, h); } DUK_INTERNAL DUK_NOINLINE void duk_hbuffer_refzero(duk_hthread *thr, duk_hbuffer *h) { duk__hbuffer_refzero_helper(thr, h); } DUK_INTERNAL DUK_NOINLINE void duk_hobject_refzero(duk_hthread *thr, duk_hobject *h) { duk__hobject_refzero_helper(thr, h, 0 /*skip_free_pending*/); } DUK_INTERNAL DUK_NOINLINE void duk_hobject_refzero_norz(duk_hthread *thr, duk_hobject *h) { duk__hobject_refzero_helper(thr, h, 1 /*skip_free_pending*/); } #if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT) DUK_INTERNAL void duk_tval_incref(duk_tval *tv) { DUK_ASSERT(tv != NULL); if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) { duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h)); DUK_ASSERT_DISABLE(h->h_refcount >= 0); DUK_HEAPHDR_PREINC_REFCOUNT(h); DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(h) != 0); /* No wrapping. */ } } DUK_INTERNAL void duk_tval_decref(duk_hthread *thr, duk_tval *tv) { DUK_ASSERT(thr != NULL); DUK_ASSERT(tv != NULL); if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) { duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h)); DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(h) >= 1); #if 0 if (DUK_HEAPHDR_PREDEC_REFCOUNT(h) != 0) { return; } duk_heaphdr_refzero(thr, h); #else duk_heaphdr_decref(thr, h); #endif } } DUK_INTERNAL void duk_tval_decref_norz(duk_hthread *thr, duk_tval *tv) { DUK_ASSERT(thr != NULL); DUK_ASSERT(tv != NULL); if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) { duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h)); DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(h) >= 1); #if 0 if (DUK_HEAPHDR_PREDEC_REFCOUNT(h) != 0) { return; } duk_heaphdr_refzero_norz(thr, h); #else duk_heaphdr_decref_norz(thr, h); #endif } } #endif /* !DUK_USE_FAST_REFCOUNT_DEFAULT */ #define DUK__DECREF_ASSERTS() do { \ DUK_ASSERT(thr != NULL); \ DUK_ASSERT(thr->heap != NULL); \ DUK_ASSERT(h != NULL); \ DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID((duk_heaphdr *) h)); \ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) >= 1); \ } while (0) #if defined(DUK_USE_ROM_OBJECTS) #define DUK__INCREF_SHARED() do { \ if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) h)) { \ return; \ } \ DUK_HEAPHDR_PREINC_REFCOUNT((duk_heaphdr *) h); \ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) != 0); /* No wrapping. */ \ } while (0) #define DUK__DECREF_SHARED() do { \ if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) h)) { \ return; \ } \ if (DUK_HEAPHDR_PREDEC_REFCOUNT((duk_heaphdr *) h) != 0) { \ return; \ } \ } while (0) #else #define DUK__INCREF_SHARED() do { \ DUK_HEAPHDR_PREINC_REFCOUNT((duk_heaphdr *) h); \ DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) != 0); /* No wrapping. */ \ } while (0) #define DUK__DECREF_SHARED() do { \ if (DUK_HEAPHDR_PREDEC_REFCOUNT((duk_heaphdr *) h) != 0) { \ return; \ } \ } while (0) #endif #if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT) /* This will in practice be inlined because it's just an INC instructions * and a bit test + INC when ROM objects are enabled. */ DUK_INTERNAL void duk_heaphdr_incref(duk_heaphdr *h) { DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h)); DUK_ASSERT_DISABLE(DUK_HEAPHDR_GET_REFCOUNT(h) >= 0); DUK__INCREF_SHARED(); } DUK_INTERNAL void duk_heaphdr_decref(duk_hthread *thr, duk_heaphdr *h) { DUK__DECREF_ASSERTS(); DUK__DECREF_SHARED(); duk_heaphdr_refzero(thr, h); /* Forced mark-and-sweep when GC torture enabled; this could happen * on any DECREF (but not DECREF_NORZ). */ DUK_GC_TORTURE(thr->heap); } DUK_INTERNAL void duk_heaphdr_decref_norz(duk_hthread *thr, duk_heaphdr *h) { DUK__DECREF_ASSERTS(); DUK__DECREF_SHARED(); duk_heaphdr_refzero_norz(thr, h); } #endif /* !DUK_USE_FAST_REFCOUNT_DEFAULT */ #if 0 /* Not needed. */ DUK_INTERNAL void duk_hstring_decref(duk_hthread *thr, duk_hstring *h) { DUK__DECREF_ASSERTS(); DUK__DECREF_SHARED(); duk_hstring_refzero(thr, h); } DUK_INTERNAL void duk_hstring_decref_norz(duk_hthread *thr, duk_hstring *h) { DUK__DECREF_ASSERTS(); DUK__DECREF_SHARED(); duk_hstring_refzero_norz(thr, h); } DUK_INTERNAL void duk_hbuffer_decref(duk_hthread *thr, duk_hbuffer *h) { DUK__DECREF_ASSERTS(); DUK__DECREF_SHARED(); duk_hbuffer_refzero(thr, h); } DUK_INTERNAL void duk_hbuffer_decref_norz(duk_hthread *thr, duk_hbuffer *h) { DUK__DECREF_ASSERTS(); DUK__DECREF_SHARED(); duk_hbuffer_refzero_norz(thr, h); } DUK_INTERNAL void duk_hobject_decref(duk_hthread *thr, duk_hobject *h) { DUK__DECREF_ASSERTS(); DUK__DECREF_SHARED(); duk_hobject_refzero(thr, h); } DUK_INTERNAL void duk_hobject_decref_norz(duk_hthread *thr, duk_hobject *h) { DUK__DECREF_ASSERTS(); DUK__DECREF_SHARED(); duk_hobject_refzero_norz(thr, h); } #endif #else /* DUK_USE_REFERENCE_COUNTING */ /* no refcounting */ #endif /* DUK_USE_REFERENCE_COUNTING */ /* automatic undefs */ #undef DUK__DECREF_ASSERTS #undef DUK__DECREF_SHARED #undef DUK__INCREF_SHARED #undef DUK__RZ_BUFFER #undef DUK__RZ_INLINE #undef DUK__RZ_OBJECT #undef DUK__RZ_STRING #undef DUK__RZ_SUPPRESS_ASSERT1 #undef DUK__RZ_SUPPRESS_ASSERT2 #undef DUK__RZ_SUPPRESS_CHECK #undef DUK__RZ_SUPPRESS_COND /* * String cache. * * Provides a cache to optimize indexed string lookups. The cache keeps * track of (byte offset, char offset) states for a fixed number of strings. * Otherwise we'd need to scan from either end of the string, as we store * strings in (extended) UTF-8. */ /* #include duk_internal.h -> already included */ /* * Delete references to given hstring from the heap string cache. * * String cache references are 'weak': they are not counted towards * reference counts, nor serve as roots for mark-and-sweep. When an * object is about to be freed, such references need to be removed. */ DUK_INTERNAL void duk_heap_strcache_string_remove(duk_heap *heap, duk_hstring *h) { duk_uint_t i; for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) { duk_strcache_entry *c = heap->strcache + i; if (c->h == h) { DUK_DD(DUK_DDPRINT("deleting weak strcache reference to hstring %p from heap %p", (void *) h, (void *) heap)); c->h = NULL; /* XXX: the string shouldn't appear twice, but we now loop to the * end anyway; if fixed, add a looping assertion to ensure there * is no duplicate. */ } } } /* * String scanning helpers * * All bytes other than UTF-8 continuation bytes ([0x80,0xbf]) are * considered to contribute a character. This must match how string * character length is computed. */ DUK_LOCAL const duk_uint8_t *duk__scan_forwards(const duk_uint8_t *p, const duk_uint8_t *q, duk_uint_fast32_t n) { while (n > 0) { for (;;) { p++; if (p >= q) { return NULL; } if ((*p & 0xc0) != 0x80) { break; } } n--; } return p; } DUK_LOCAL const duk_uint8_t *duk__scan_backwards(const duk_uint8_t *p, const duk_uint8_t *q, duk_uint_fast32_t n) { while (n > 0) { for (;;) { p--; if (p < q) { return NULL; } if ((*p & 0xc0) != 0x80) { break; } } n--; } return p; } /* * Convert char offset to byte offset * * Avoid using the string cache if possible: for ASCII strings byte and * char offsets are equal and for short strings direct scanning may be * better than using the string cache (which may evict a more important * entry). * * Typing now assumes 32-bit string byte/char offsets (duk_uint_fast32_t). * Better typing might be to use duk_size_t. * * Caller should ensure 'char_offset' is within the string bounds [0,charlen] * (endpoint is inclusive). If this is not the case, no memory unsafe * behavior will happen but an error will be thrown. */ DUK_INTERNAL duk_uint_fast32_t duk_heap_strcache_offset_char2byte(duk_hthread *thr, duk_hstring *h, duk_uint_fast32_t char_offset) { duk_heap *heap; duk_strcache_entry *sce; duk_uint_fast32_t byte_offset; duk_uint_t i; duk_bool_t use_cache; duk_uint_fast32_t dist_start, dist_end, dist_sce; duk_uint_fast32_t char_length; const duk_uint8_t *p_start; const duk_uint8_t *p_end; const duk_uint8_t *p_found; /* * For ASCII strings, the answer is simple. */ if (DUK_LIKELY(DUK_HSTRING_IS_ASCII(h))) { return char_offset; } char_length = (duk_uint_fast32_t) DUK_HSTRING_GET_CHARLEN(h); DUK_ASSERT(char_offset <= char_length); if (DUK_LIKELY(DUK_HSTRING_IS_ASCII(h))) { /* Must recheck because the 'is ascii' flag may be set * lazily. Alternatively, we could just compare charlen * to bytelen. */ return char_offset; } /* * For non-ASCII strings, we need to scan forwards or backwards * from some starting point. The starting point may be the start * or end of the string, or some cached midpoint in the string * cache. * * For "short" strings we simply scan without checking or updating * the cache. For longer strings we check and update the cache as * necessary, inserting a new cache entry if none exists. */ DUK_DDD(DUK_DDDPRINT("non-ascii string %p, char_offset=%ld, clen=%ld, blen=%ld", (void *) h, (long) char_offset, (long) DUK_HSTRING_GET_CHARLEN(h), (long) DUK_HSTRING_GET_BYTELEN(h))); heap = thr->heap; sce = NULL; use_cache = (char_length > DUK_HEAP_STRINGCACHE_NOCACHE_LIMIT); if (use_cache) { #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) DUK_DDD(DUK_DDDPRINT("stringcache before char2byte (using cache):")); for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) { duk_strcache_entry *c = heap->strcache + i; DUK_DDD(DUK_DDDPRINT(" [%ld] -> h=%p, cidx=%ld, bidx=%ld", (long) i, (void *) c->h, (long) c->cidx, (long) c->bidx)); } #endif for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) { duk_strcache_entry *c = heap->strcache + i; if (c->h == h) { sce = c; break; } } } /* * Scan from shortest distance: * - start of string * - end of string * - cache entry (if exists) */ DUK_ASSERT(DUK_HSTRING_GET_CHARLEN(h) >= char_offset); dist_start = char_offset; dist_end = char_length - char_offset; dist_sce = 0; DUK_UNREF(dist_sce); /* initialize for debug prints, needed if sce==NULL */ p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h); p_end = (const duk_uint8_t *) (p_start + DUK_HSTRING_GET_BYTELEN(h)); p_found = NULL; if (sce) { if (char_offset >= sce->cidx) { dist_sce = char_offset - sce->cidx; if ((dist_sce <= dist_start) && (dist_sce <= dist_end)) { DUK_DDD(DUK_DDDPRINT("non-ascii string, use_cache=%ld, sce=%p:%ld:%ld, " "dist_start=%ld, dist_end=%ld, dist_sce=%ld => " "scan forwards from sce", (long) use_cache, (void *) (sce ? sce->h : NULL), (sce ? (long) sce->cidx : (long) -1), (sce ? (long) sce->bidx : (long) -1), (long) dist_start, (long) dist_end, (long) dist_sce)); p_found = duk__scan_forwards(p_start + sce->bidx, p_end, dist_sce); goto scan_done; } } else { dist_sce = sce->cidx - char_offset; if ((dist_sce <= dist_start) && (dist_sce <= dist_end)) { DUK_DDD(DUK_DDDPRINT("non-ascii string, use_cache=%ld, sce=%p:%ld:%ld, " "dist_start=%ld, dist_end=%ld, dist_sce=%ld => " "scan backwards from sce", (long) use_cache, (void *) (sce ? sce->h : NULL), (sce ? (long) sce->cidx : (long) -1), (sce ? (long) sce->bidx : (long) -1), (long) dist_start, (long) dist_end, (long) dist_sce)); p_found = duk__scan_backwards(p_start + sce->bidx, p_start, dist_sce); goto scan_done; } } } /* no sce, or sce scan not best */ if (dist_start <= dist_end) { DUK_DDD(DUK_DDDPRINT("non-ascii string, use_cache=%ld, sce=%p:%ld:%ld, " "dist_start=%ld, dist_end=%ld, dist_sce=%ld => " "scan forwards from string start", (long) use_cache, (void *) (sce ? sce->h : NULL), (sce ? (long) sce->cidx : (long) -1), (sce ? (long) sce->bidx : (long) -1), (long) dist_start, (long) dist_end, (long) dist_sce)); p_found = duk__scan_forwards(p_start, p_end, dist_start); } else { DUK_DDD(DUK_DDDPRINT("non-ascii string, use_cache=%ld, sce=%p:%ld:%ld, " "dist_start=%ld, dist_end=%ld, dist_sce=%ld => " "scan backwards from string end", (long) use_cache, (void *) (sce ? sce->h : NULL), (sce ? (long) sce->cidx : (long) -1), (sce ? (long) sce->bidx : (long) -1), (long) dist_start, (long) dist_end, (long) dist_sce)); p_found = duk__scan_backwards(p_end, p_start, dist_end); } scan_done: if (DUK_UNLIKELY(p_found == NULL)) { /* Scan error: this shouldn't normally happen; it could happen if * string is not valid UTF-8 data, and clen/blen are not consistent * with the scanning algorithm. */ goto scan_error; } DUK_ASSERT(p_found >= p_start); DUK_ASSERT(p_found <= p_end); /* may be equal */ byte_offset = (duk_uint32_t) (p_found - p_start); DUK_DDD(DUK_DDDPRINT("-> string %p, cidx %ld -> bidx %ld", (void *) h, (long) char_offset, (long) byte_offset)); /* * Update cache entry (allocating if necessary), and move the * cache entry to the first place (in an "LRU" policy). */ if (use_cache) { /* update entry, allocating if necessary */ if (!sce) { sce = heap->strcache + DUK_HEAP_STRCACHE_SIZE - 1; /* take last entry */ sce->h = h; } DUK_ASSERT(sce != NULL); sce->bidx = (duk_uint32_t) (p_found - p_start); sce->cidx = (duk_uint32_t) char_offset; /* LRU: move our entry to first */ if (sce > &heap->strcache[0]) { /* * A C * B A * C <- sce ==> B * D D */ duk_strcache_entry tmp; tmp = *sce; duk_memmove((void *) (&heap->strcache[1]), (const void *) (&heap->strcache[0]), (size_t) (((char *) sce) - ((char *) &heap->strcache[0]))); heap->strcache[0] = tmp; /* 'sce' points to the wrong entry here, but is no longer used */ } #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) DUK_DDD(DUK_DDDPRINT("stringcache after char2byte (using cache):")); for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) { duk_strcache_entry *c = heap->strcache + i; DUK_DDD(DUK_DDDPRINT(" [%ld] -> h=%p, cidx=%ld, bidx=%ld", (long) i, (void *) c->h, (long) c->cidx, (long) c->bidx)); } #endif } return byte_offset; scan_error: DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return 0;); } /* * Heap string table handling, string interning. */ /* #include duk_internal.h -> already included */ /* Resize checks not needed if minsize == maxsize, typical for low memory * targets. */ #define DUK__STRTAB_RESIZE_CHECK #if (DUK_USE_STRTAB_MINSIZE == DUK_USE_STRTAB_MAXSIZE) #undef DUK__STRTAB_RESIZE_CHECK #endif #if defined(DUK_USE_STRTAB_PTRCOMP) #define DUK__HEAPPTR_ENC16(heap,ptr) DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (ptr)) #define DUK__HEAPPTR_DEC16(heap,val) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (val)) #define DUK__GET_STRTABLE(heap) ((heap)->strtable16) #else #define DUK__HEAPPTR_ENC16(heap,ptr) (ptr) #define DUK__HEAPPTR_DEC16(heap,val) (val) #define DUK__GET_STRTABLE(heap) ((heap)->strtable) #endif #define DUK__STRTAB_U32_MAX_STRLEN 10 /* 4'294'967'295 */ /* * Debug dump stringtable. */ #if defined(DUK_USE_DEBUG) DUK_INTERNAL void duk_heap_strtable_dump(duk_heap *heap) { #if defined(DUK_USE_STRTAB_PTRCOMP) duk_uint16_t *strtable; #else duk_hstring **strtable; #endif duk_uint32_t i; duk_hstring *h; duk_size_t count_total = 0; duk_size_t count_chain; duk_size_t count_chain_min = DUK_SIZE_MAX; duk_size_t count_chain_max = 0; duk_size_t count_len[8]; /* chain lengths from 0 to 7 */ if (heap == NULL) { DUK_D(DUK_DPRINT("string table, heap=NULL")); return; } strtable = DUK__GET_STRTABLE(heap); if (strtable == NULL) { DUK_D(DUK_DPRINT("string table, strtab=NULL")); return; } duk_memzero((void *) count_len, sizeof(count_len)); for (i = 0; i < heap->st_size; i++) { h = DUK__HEAPPTR_DEC16(heap, strtable[i]); count_chain = 0; while (h != NULL) { count_chain++; h = h->hdr.h_next; } if (count_chain < sizeof(count_len) / sizeof(duk_size_t)) { count_len[count_chain]++; } count_chain_max = (count_chain > count_chain_max ? count_chain : count_chain_max); count_chain_min = (count_chain < count_chain_min ? count_chain : count_chain_min); count_total += count_chain; } DUK_D(DUK_DPRINT("string table, strtab=%p, count=%lu, chain min=%lu max=%lu avg=%lf: " "counts: %lu %lu %lu %lu %lu %lu %lu %lu ...", (void *) heap->strtable, (unsigned long) count_total, (unsigned long) count_chain_min, (unsigned long) count_chain_max, (double) count_total / (double) heap->st_size, (unsigned long) count_len[0], (unsigned long) count_len[1], (unsigned long) count_len[2], (unsigned long) count_len[3], (unsigned long) count_len[4], (unsigned long) count_len[5], (unsigned long) count_len[6], (unsigned long) count_len[7])); } #endif /* DUK_USE_DEBUG */ /* * Assertion helper to ensure strtable is populated correctly. */ #if defined(DUK_USE_ASSERTIONS) DUK_LOCAL void duk__strtable_assert_checks(duk_heap *heap) { #if defined(DUK_USE_STRTAB_PTRCOMP) duk_uint16_t *strtable; #else duk_hstring **strtable; #endif duk_uint32_t i; duk_hstring *h; duk_size_t count = 0; DUK_ASSERT(heap != NULL); strtable = DUK__GET_STRTABLE(heap); if (strtable != NULL) { DUK_ASSERT(heap->st_size != 0); DUK_ASSERT(heap->st_mask == heap->st_size - 1); for (i = 0; i < heap->st_size; i++) { h = DUK__HEAPPTR_DEC16(heap, strtable[i]); while (h != NULL) { DUK_ASSERT((DUK_HSTRING_GET_HASH(h) & heap->st_mask) == i); count++; h = h->hdr.h_next; } } } else { DUK_ASSERT(heap->st_size == 0); DUK_ASSERT(heap->st_mask == 0); } #if defined(DUK__STRTAB_RESIZE_CHECK) DUK_ASSERT(count == (duk_size_t) heap->st_count); #endif } #endif /* DUK_USE_ASSERTIONS */ /* * Allocate and initialize a duk_hstring. * * Returns a NULL if allocation or initialization fails for some reason. * * The string won't be inserted into the string table and isn't tracked in * any way (link pointers will be NULL). The caller must place the string * into the string table without any risk of a longjmp, otherwise the string * is leaked. */ DUK_LOCAL duk_hstring *duk__strtable_alloc_hstring(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen, duk_uint32_t strhash, const duk_uint8_t *extdata) { duk_hstring *res; const duk_uint8_t *data; #if !defined(DUK_USE_HSTRING_ARRIDX) duk_uarridx_t dummy; #endif DUK_ASSERT(heap != NULL); DUK_UNREF(extdata); #if defined(DUK_USE_STRLEN16) /* If blen <= 0xffffUL, clen is also guaranteed to be <= 0xffffUL. */ if (blen > 0xffffUL) { DUK_D(DUK_DPRINT("16-bit string blen/clen active and blen over 16 bits, reject intern")); goto alloc_error; } #endif /* XXX: Memzeroing the allocated structure is not really necessary * because we could just initialize all fields explicitly (almost * all fields are initialized explicitly anyway). */ #if defined(DUK_USE_HSTRING_EXTDATA) && defined(DUK_USE_EXTSTR_INTERN_CHECK) if (extdata) { res = (duk_hstring *) DUK_ALLOC(heap, sizeof(duk_hstring_external)); if (DUK_UNLIKELY(res == NULL)) { goto alloc_error; } duk_memzero(res, sizeof(duk_hstring_external)); #if defined(DUK_USE_EXPLICIT_NULL_INIT) DUK_HEAPHDR_STRING_INIT_NULLS(&res->hdr); #endif DUK_HEAPHDR_SET_TYPE_AND_FLAGS(&res->hdr, DUK_HTYPE_STRING, DUK_HSTRING_FLAG_EXTDATA); DUK_ASSERT(extdata[blen] == 0); /* Application responsibility. */ data = extdata; ((duk_hstring_external *) res)->extdata = extdata; } else #endif /* DUK_USE_HSTRING_EXTDATA && DUK_USE_EXTSTR_INTERN_CHECK */ { duk_uint8_t *data_tmp; /* NUL terminate for convenient C access */ DUK_ASSERT(sizeof(duk_hstring) + blen + 1 > blen); /* No wrap, limits ensure. */ res = (duk_hstring *) DUK_ALLOC(heap, sizeof(duk_hstring) + blen + 1); if (DUK_UNLIKELY(res == NULL)) { goto alloc_error; } duk_memzero(res, sizeof(duk_hstring)); #if defined(DUK_USE_EXPLICIT_NULL_INIT) DUK_HEAPHDR_STRING_INIT_NULLS(&res->hdr); #endif DUK_HEAPHDR_SET_TYPE_AND_FLAGS(&res->hdr, DUK_HTYPE_STRING, 0); data_tmp = (duk_uint8_t *) (res + 1); duk_memcpy(data_tmp, str, blen); data_tmp[blen] = (duk_uint8_t) 0; data = (const duk_uint8_t *) data_tmp; } DUK_HSTRING_SET_BYTELEN(res, blen); DUK_HSTRING_SET_HASH(res, strhash); DUK_ASSERT(!DUK_HSTRING_HAS_ARRIDX(res)); #if defined(DUK_USE_HSTRING_ARRIDX) res->arridx = duk_js_to_arrayindex_string(data, blen); if (res->arridx != DUK_HSTRING_NO_ARRAY_INDEX) { #else dummy = duk_js_to_arrayindex_string(data, blen); if (dummy != DUK_HSTRING_NO_ARRAY_INDEX) { #endif /* Array index strings cannot be symbol strings, * and they're always pure ASCII so blen == clen. */ DUK_HSTRING_SET_ARRIDX(res); DUK_HSTRING_SET_ASCII(res); DUK_ASSERT(duk_unicode_unvalidated_utf8_length(data, (duk_size_t) blen) == blen); } else { /* Because 'data' is NUL-terminated, we don't need a * blen > 0 check here. For NUL (0x00) the symbol * checks will be false. */ if (DUK_UNLIKELY(data[0] >= 0x80U)) { if (data[0] <= 0x81) { DUK_HSTRING_SET_SYMBOL(res); } else if (data[0] == 0x82U || data[0] == 0xffU) { DUK_HSTRING_SET_HIDDEN(res); DUK_HSTRING_SET_SYMBOL(res); } } /* Using an explicit 'ASCII' flag has larger footprint (one call site * only) but is quite useful for the case when there's no explicit * 'clen' in duk_hstring. * * The flag is set lazily for RAM strings. */ DUK_ASSERT(!DUK_HSTRING_HAS_ASCII(res)); #if defined(DUK_USE_HSTRING_LAZY_CLEN) /* Charlen initialized to 0, updated on-the-fly. */ #else duk_hstring_init_charlen(res); /* Also sets ASCII flag. */ #endif } DUK_DDD(DUK_DDDPRINT("interned string, hash=0x%08lx, blen=%ld, has_arridx=%ld, has_extdata=%ld", (unsigned long) DUK_HSTRING_GET_HASH(res), (long) DUK_HSTRING_GET_BYTELEN(res), (long) (DUK_HSTRING_HAS_ARRIDX(res) ? 1 : 0), (long) (DUK_HSTRING_HAS_EXTDATA(res) ? 1 : 0))); DUK_ASSERT(res != NULL); return res; alloc_error: return NULL; } /* * Grow strtable allocation in-place. */ #if defined(DUK__STRTAB_RESIZE_CHECK) DUK_LOCAL void duk__strtable_grow_inplace(duk_heap *heap) { duk_uint32_t new_st_size; duk_uint32_t old_st_size; duk_uint32_t i; duk_hstring *h; duk_hstring *next; duk_hstring *prev; #if defined(DUK_USE_STRTAB_PTRCOMP) duk_uint16_t *new_ptr; duk_uint16_t *new_ptr_high; #else duk_hstring **new_ptr; duk_hstring **new_ptr_high; #endif DUK_DD(DUK_DDPRINT("grow in-place: %lu -> %lu", (unsigned long) heap->st_size, (unsigned long) heap->st_size * 2)); DUK_ASSERT(heap != NULL); DUK_ASSERT(heap->st_resizing == 1); DUK_ASSERT(heap->st_size >= 2); DUK_ASSERT((heap->st_size & (heap->st_size - 1)) == 0); /* 2^N */ DUK_ASSERT(DUK__GET_STRTABLE(heap) != NULL); DUK_STATS_INC(heap, stats_strtab_resize_grow); new_st_size = heap->st_size << 1U; DUK_ASSERT(new_st_size > heap->st_size); /* No overflow. */ /* Reallocate the strtable first and then work in-place to rehash * strings. We don't need an indirect allocation here: even if GC * is triggered to satisfy the allocation, recursive strtable resize * is prevented by flags. This is also why we don't need to use * DUK_REALLOC_INDIRECT(). */ #if defined(DUK_USE_STRTAB_PTRCOMP) new_ptr = (duk_uint16_t *) DUK_REALLOC(heap, heap->strtable16, sizeof(duk_uint16_t) * new_st_size); #else new_ptr = (duk_hstring **) DUK_REALLOC(heap, heap->strtable, sizeof(duk_hstring *) * new_st_size); #endif if (DUK_UNLIKELY(new_ptr == NULL)) { /* If realloc fails we can continue normally: the string table * won't "fill up" although chains will gradually get longer. * When string insertions continue, we'll quite soon try again * with no special handling. */ DUK_D(DUK_DPRINT("string table grow failed, ignoring")); return; } #if defined(DUK_USE_STRTAB_PTRCOMP) heap->strtable16 = new_ptr; #else heap->strtable = new_ptr; #endif /* Rehash a single bucket into two separate ones. When we grow * by x2 the highest 'new' bit determines whether a string remains * in its old position (bit is 0) or goes to a new one (bit is 1). */ old_st_size = heap->st_size; new_ptr_high = new_ptr + old_st_size; for (i = 0; i < old_st_size; i++) { duk_hstring *new_root; duk_hstring *new_root_high; h = DUK__HEAPPTR_DEC16(heap, new_ptr[i]); new_root = h; new_root_high = NULL; prev = NULL; while (h != NULL) { duk_uint32_t mask; DUK_ASSERT((DUK_HSTRING_GET_HASH(h) & heap->st_mask) == i); next = h->hdr.h_next; /* Example: if previous size was 256, previous mask is 0xFF * and size is 0x100 which corresponds to the new bit that * comes into play. */ DUK_ASSERT(heap->st_mask == old_st_size - 1); mask = old_st_size; if (DUK_HSTRING_GET_HASH(h) & mask) { if (prev != NULL) { prev->hdr.h_next = h->hdr.h_next; } else { DUK_ASSERT(h == new_root); new_root = h->hdr.h_next; } h->hdr.h_next = new_root_high; new_root_high = h; } else { prev = h; } h = next; } new_ptr[i] = DUK__HEAPPTR_ENC16(heap, new_root); new_ptr_high[i] = DUK__HEAPPTR_ENC16(heap, new_root_high); } heap->st_size = new_st_size; heap->st_mask = new_st_size - 1; #if defined(DUK_USE_ASSERTIONS) duk__strtable_assert_checks(heap); #endif } #endif /* DUK__STRTAB_RESIZE_CHECK */ /* * Shrink strtable allocation in-place. */ #if defined(DUK__STRTAB_RESIZE_CHECK) DUK_LOCAL void duk__strtable_shrink_inplace(duk_heap *heap) { duk_uint32_t new_st_size; duk_uint32_t i; duk_hstring *h; duk_hstring *other; duk_hstring *root; #if defined(DUK_USE_STRTAB_PTRCOMP) duk_uint16_t *old_ptr; duk_uint16_t *old_ptr_high; duk_uint16_t *new_ptr; #else duk_hstring **old_ptr; duk_hstring **old_ptr_high; duk_hstring **new_ptr; #endif DUK_DD(DUK_DDPRINT("shrink in-place: %lu -> %lu", (unsigned long) heap->st_size, (unsigned long) heap->st_size / 2)); DUK_ASSERT(heap != NULL); DUK_ASSERT(heap->st_resizing == 1); DUK_ASSERT(heap->st_size >= 2); DUK_ASSERT((heap->st_size & (heap->st_size - 1)) == 0); /* 2^N */ DUK_ASSERT(DUK__GET_STRTABLE(heap) != NULL); DUK_STATS_INC(heap, stats_strtab_resize_shrink); new_st_size = heap->st_size >> 1U; /* Combine two buckets into a single one. When we shrink, one hash * bit (highest) disappears. */ old_ptr = DUK__GET_STRTABLE(heap); old_ptr_high = old_ptr + new_st_size; for (i = 0; i < new_st_size; i++) { h = DUK__HEAPPTR_DEC16(heap, old_ptr[i]); other = DUK__HEAPPTR_DEC16(heap, old_ptr_high[i]); if (h == NULL) { /* First chain is empty, so use second one as is. */ root = other; } else { /* Find end of first chain, and link in the second. */ root = h; while (h->hdr.h_next != NULL) { h = h->hdr.h_next; } h->hdr.h_next = other; } old_ptr[i] = DUK__HEAPPTR_ENC16(heap, root); } heap->st_size = new_st_size; heap->st_mask = new_st_size - 1; /* The strtable is now consistent and we can realloc safely. Even * if side effects cause string interning or removal the strtable * updates are safe. Recursive resize has been prevented by caller. * This is also why we don't need to use DUK_REALLOC_INDIRECT(). * * We assume a realloc() to a smaller size is guaranteed to succeed. * It would be relatively straightforward to handle the error by * essentially performing a "grow" step to recover. */ #if defined(DUK_USE_STRTAB_PTRCOMP) new_ptr = (duk_uint16_t *) DUK_REALLOC(heap, heap->strtable16, sizeof(duk_uint16_t) * new_st_size); DUK_ASSERT(new_ptr != NULL); heap->strtable16 = new_ptr; #else new_ptr = (duk_hstring **) DUK_REALLOC(heap, heap->strtable, sizeof(duk_hstring *) * new_st_size); DUK_ASSERT(new_ptr != NULL); heap->strtable = new_ptr; #endif #if defined(DUK_USE_ASSERTIONS) duk__strtable_assert_checks(heap); #endif } #endif /* DUK__STRTAB_RESIZE_CHECK */ /* * Grow/shrink check. */ #if defined(DUK__STRTAB_RESIZE_CHECK) DUK_LOCAL DUK_COLD DUK_NOINLINE void duk__strtable_resize_check(duk_heap *heap) { duk_uint32_t load_factor; /* fixed point */ DUK_ASSERT(heap != NULL); #if defined(DUK_USE_STRTAB_PTRCOMP) DUK_ASSERT(heap->strtable16 != NULL); #else DUK_ASSERT(heap->strtable != NULL); #endif DUK_STATS_INC(heap, stats_strtab_resize_check); /* Prevent recursive resizing. */ if (DUK_UNLIKELY(heap->st_resizing != 0U)) { DUK_D(DUK_DPRINT("prevent recursive strtable resize")); return; } heap->st_resizing = 1; DUK_ASSERT(heap->st_size >= 16U); DUK_ASSERT((heap->st_size >> 4U) >= 1); load_factor = heap->st_count / (heap->st_size >> 4U); DUK_DD(DUK_DDPRINT("resize check string table: size=%lu, count=%lu, load_factor=%lu (fixed point .4; float %lf)", (unsigned long) heap->st_size, (unsigned long) heap->st_count, (unsigned long) load_factor, (double) heap->st_count / (double) heap->st_size)); if (load_factor >= DUK_USE_STRTAB_GROW_LIMIT) { if (heap->st_size >= DUK_USE_STRTAB_MAXSIZE) { DUK_DD(DUK_DDPRINT("want to grow strtable (based on load factor) but already maximum size")); } else { DUK_D(DUK_DPRINT("grow string table: %lu -> %lu", (unsigned long) heap->st_size, (unsigned long) heap->st_size * 2)); #if defined(DUK_USE_DEBUG) duk_heap_strtable_dump(heap); #endif duk__strtable_grow_inplace(heap); } } else if (load_factor <= DUK_USE_STRTAB_SHRINK_LIMIT) { if (heap->st_size <= DUK_USE_STRTAB_MINSIZE) { DUK_DD(DUK_DDPRINT("want to shrink strtable (based on load factor) but already minimum size")); } else { DUK_D(DUK_DPRINT("shrink string table: %lu -> %lu", (unsigned long) heap->st_size, (unsigned long) heap->st_size / 2)); #if defined(DUK_USE_DEBUG) duk_heap_strtable_dump(heap); #endif duk__strtable_shrink_inplace(heap); } } else { DUK_DD(DUK_DDPRINT("no need for strtable resize")); } heap->st_resizing = 0; } #endif /* DUK__STRTAB_RESIZE_CHECK */ /* * Torture grow/shrink: unconditionally grow and shrink back. */ #if defined(DUK_USE_STRTAB_TORTURE) && defined(DUK__STRTAB_RESIZE_CHECK) DUK_LOCAL void duk__strtable_resize_torture(duk_heap *heap) { duk_uint32_t old_st_size; DUK_ASSERT(heap != NULL); old_st_size = heap->st_size; if (old_st_size >= DUK_USE_STRTAB_MAXSIZE) { return; } heap->st_resizing = 1; duk__strtable_grow_inplace(heap); if (heap->st_size > old_st_size) { duk__strtable_shrink_inplace(heap); } heap->st_resizing = 0; } #endif /* DUK_USE_STRTAB_TORTURE && DUK__STRTAB_RESIZE_CHECK */ /* * Raw intern; string already checked not to be present. */ DUK_LOCAL duk_hstring *duk__strtable_do_intern(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen, duk_uint32_t strhash) { duk_hstring *res; const duk_uint8_t *extdata; #if defined(DUK_USE_STRTAB_PTRCOMP) duk_uint16_t *slot; #else duk_hstring **slot; #endif DUK_DDD(DUK_DDDPRINT("do_intern: heap=%p, str=%p, blen=%lu, strhash=%lx, st_size=%lu, st_count=%lu, load=%lf", (void *) heap, (const void *) str, (unsigned long) blen, (unsigned long) strhash, (unsigned long) heap->st_size, (unsigned long) heap->st_count, (double) heap->st_count / (double) heap->st_size)); DUK_ASSERT(heap != NULL); /* Prevent any side effects on the string table and the caller provided * str/blen arguments while interning is in progress. For example, if * the caller provided str/blen from a dynamic buffer, a finalizer * might resize or modify that dynamic buffer, invalidating the call * arguments. * * While finalizers must be prevented, mark-and-sweep itself is fine. * Recursive string table resize is prevented explicitly here. */ heap->pf_prevent_count++; DUK_ASSERT(heap->pf_prevent_count != 0); /* Wrap. */ #if defined(DUK_USE_STRTAB_TORTURE) && defined(DUK__STRTAB_RESIZE_CHECK) duk__strtable_resize_torture(heap); #endif /* String table grow/shrink check. Because of chaining (and no * accumulation issues as with hash probe chains and DELETED * markers) there's never a mandatory need to resize right now. * Check for the resize only periodically, based on st_count * bit pattern. Because string table removal doesn't do a shrink * check, we do that also here. * * Do the resize and possible grow/shrink before the new duk_hstring * has been allocated. Otherwise we may trigger a GC when the result * duk_hstring is not yet strongly referenced. */ #if defined(DUK__STRTAB_RESIZE_CHECK) if (DUK_UNLIKELY((heap->st_count & DUK_USE_STRTAB_RESIZE_CHECK_MASK) == 0)) { duk__strtable_resize_check(heap); } #endif /* External string check (low memory optimization). */ #if defined(DUK_USE_HSTRING_EXTDATA) && defined(DUK_USE_EXTSTR_INTERN_CHECK) extdata = (const duk_uint8_t *) DUK_USE_EXTSTR_INTERN_CHECK(heap->heap_udata, (void *) DUK_LOSE_CONST(str), (duk_size_t) blen); #else extdata = (const duk_uint8_t *) NULL; #endif /* Allocate and initialize string, not yet linked. This may cause a * GC which may cause other strings to be interned and inserted into * the string table before we insert our string. Finalizer execution * is disabled intentionally to avoid a finalizer from e.g. resizing * a buffer used as a data area for 'str'. */ res = duk__strtable_alloc_hstring(heap, str, blen, strhash, extdata); /* Allow side effects again: GC must be avoided until duk_hstring * result (if successful) has been INCREF'd. */ DUK_ASSERT(heap->pf_prevent_count > 0); heap->pf_prevent_count--; /* Alloc error handling. */ if (DUK_UNLIKELY(res == NULL)) { #if defined(DUK_USE_HSTRING_EXTDATA) && defined(DUK_USE_EXTSTR_INTERN_CHECK) if (extdata != NULL) { DUK_USE_EXTSTR_FREE(heap->heap_udata, (const void *) extdata); } #endif return NULL; } /* Insert into string table. */ #if defined(DUK_USE_STRTAB_PTRCOMP) slot = heap->strtable16 + (strhash & heap->st_mask); #else slot = heap->strtable + (strhash & heap->st_mask); #endif DUK_ASSERT(res->hdr.h_next == NULL); /* This is the case now, but unnecessary zeroing/NULLing. */ res->hdr.h_next = DUK__HEAPPTR_DEC16(heap, *slot); *slot = DUK__HEAPPTR_ENC16(heap, res); /* Update string count only for successful inserts. */ #if defined(DUK__STRTAB_RESIZE_CHECK) heap->st_count++; #endif /* The duk_hstring is in the string table but is not yet strongly * reachable. Calling code MUST NOT make any allocations or other * side effects before the duk_hstring has been INCREF'd and made * reachable. */ return res; } /* * Intern a string from str/blen, returning either an existing duk_hstring * or adding a new one into the string table. The input string does -not- * need to be NUL terminated. * * The input 'str' argument may point to a Duktape managed data area such as * the data area of a dynamic buffer. It's crucial to avoid any side effects * that might affect the data area (e.g. resize the dynamic buffer, or write * to the buffer) before the string is fully interned. */ #if defined(DUK_USE_ROM_STRINGS) DUK_LOCAL duk_hstring *duk__strtab_romstring_lookup(duk_heap *heap, const duk_uint8_t *str, duk_size_t blen, duk_uint32_t strhash) { duk_size_t lookup_hash; duk_hstring *curr; DUK_ASSERT(heap != NULL); DUK_UNREF(heap); lookup_hash = (blen << 4); if (blen > 0) { lookup_hash += str[0]; } lookup_hash &= 0xff; curr = (duk_hstring *) DUK_LOSE_CONST(duk_rom_strings_lookup[lookup_hash]); while (curr != NULL) { /* Unsafe memcmp() because for zero blen, str may be NULL. */ if (strhash == DUK_HSTRING_GET_HASH(curr) && blen == DUK_HSTRING_GET_BYTELEN(curr) && duk_memcmp_unsafe((const void *) str, (const void *) DUK_HSTRING_GET_DATA(curr), blen) == 0) { DUK_DDD(DUK_DDDPRINT("intern check: rom string: %!O, computed hash 0x%08lx, rom hash 0x%08lx", curr, (unsigned long) strhash, (unsigned long) DUK_HSTRING_GET_HASH(curr))); return curr; } curr = curr->hdr.h_next; } return NULL; } #endif /* DUK_USE_ROM_STRINGS */ DUK_INTERNAL duk_hstring *duk_heap_strtable_intern(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen) { duk_uint32_t strhash; duk_hstring *h; DUK_DDD(DUK_DDDPRINT("intern check: heap=%p, str=%p, blen=%lu", (void *) heap, (const void *) str, (unsigned long) blen)); /* Preliminaries. */ /* XXX: maybe just require 'str != NULL' even for zero size? */ DUK_ASSERT(heap != NULL); DUK_ASSERT(blen == 0 || str != NULL); DUK_ASSERT(blen <= DUK_HSTRING_MAX_BYTELEN); /* Caller is responsible for ensuring this. */ strhash = duk_heap_hashstring(heap, str, (duk_size_t) blen); /* String table lookup. */ DUK_ASSERT(DUK__GET_STRTABLE(heap) != NULL); DUK_ASSERT(heap->st_size > 0); DUK_ASSERT(heap->st_size == heap->st_mask + 1); #if defined(DUK_USE_STRTAB_PTRCOMP) h = DUK__HEAPPTR_DEC16(heap, heap->strtable16[strhash & heap->st_mask]); #else h = heap->strtable[strhash & heap->st_mask]; #endif while (h != NULL) { if (DUK_HSTRING_GET_HASH(h) == strhash && DUK_HSTRING_GET_BYTELEN(h) == blen && duk_memcmp_unsafe((const void *) str, (const void *) DUK_HSTRING_GET_DATA(h), (size_t) blen) == 0) { /* Found existing entry. */ DUK_STATS_INC(heap, stats_strtab_intern_hit); return h; } h = h->hdr.h_next; } /* ROM table lookup. Because this lookup is slower, do it only after * RAM lookup. This works because no ROM string is ever interned into * the RAM string table. */ #if defined(DUK_USE_ROM_STRINGS) h = duk__strtab_romstring_lookup(heap, str, blen, strhash); if (h != NULL) { DUK_STATS_INC(heap, stats_strtab_intern_hit); return h; } #endif /* Not found in string table; insert. */ DUK_STATS_INC(heap, stats_strtab_intern_miss); h = duk__strtable_do_intern(heap, str, blen, strhash); return h; /* may be NULL */ } /* * Intern a string from u32. */ /* XXX: Could arrange some special handling because we know that the result * will have an arridx flag and an ASCII flag, won't need a clen check, etc. */ DUK_INTERNAL duk_hstring *duk_heap_strtable_intern_u32(duk_heap *heap, duk_uint32_t val) { duk_uint8_t buf[DUK__STRTAB_U32_MAX_STRLEN]; duk_uint8_t *p; DUK_ASSERT(heap != NULL); /* This is smaller and faster than a %lu sprintf. */ p = buf + sizeof(buf); do { p--; *p = duk_lc_digits[val % 10]; val = val / 10; } while (val != 0); /* For val == 0, emit exactly one '0'. */ DUK_ASSERT(p >= buf); return duk_heap_strtable_intern(heap, (const duk_uint8_t *) p, (duk_uint32_t) ((buf + sizeof(buf)) - p)); } /* * Checked convenience variants. * * XXX: Because the main use case is for the checked variants, make them the * main functionality and provide a safe variant separately (it is only needed * during heap init). The problem with that is that longjmp state and error * creation must already be possible to throw. */ DUK_INTERNAL duk_hstring *duk_heap_strtable_intern_checked(duk_hthread *thr, const duk_uint8_t *str, duk_uint32_t blen) { duk_hstring *res; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(blen == 0 || str != NULL); res = duk_heap_strtable_intern(thr->heap, str, blen); if (DUK_UNLIKELY(res == NULL)) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return NULL;); } return res; } #if defined(DUK_USE_LITCACHE_SIZE) DUK_LOCAL duk_uint_t duk__strtable_litcache_key(const duk_uint8_t *str, duk_uint32_t blen) { duk_uintptr_t key; DUK_ASSERT(DUK_USE_LITCACHE_SIZE > 0); DUK_ASSERT(DUK_IS_POWER_OF_TWO((duk_uint_t) DUK_USE_LITCACHE_SIZE)); key = (duk_uintptr_t) blen ^ (duk_uintptr_t) str; key &= (duk_uintptr_t) (DUK_USE_LITCACHE_SIZE - 1); /* Assumes size is power of 2. */ /* Due to masking, cast is in 32-bit range. */ DUK_ASSERT(key <= DUK_UINT_MAX); return (duk_uint_t) key; } DUK_INTERNAL duk_hstring *duk_heap_strtable_intern_literal_checked(duk_hthread *thr, const duk_uint8_t *str, duk_uint32_t blen) { duk_uint_t key; duk_litcache_entry *ent; duk_hstring *h; /* Fast path check: literal exists in literal cache. */ key = duk__strtable_litcache_key(str, blen); ent = thr->heap->litcache + key; if (ent->addr == str) { DUK_DD(DUK_DDPRINT("intern check for cached, pinned literal: str=%p, blen=%ld -> duk_hstring %!O", (const void *) str, (long) blen, (duk_heaphdr *) ent->h)); DUK_ASSERT(ent->h != NULL); DUK_ASSERT(DUK_HSTRING_HAS_PINNED_LITERAL(ent->h)); DUK_STATS_INC(thr->heap, stats_strtab_litcache_hit); return ent->h; } /* Intern and update (overwrite) cache entry. */ h = duk_heap_strtable_intern_checked(thr, str, blen); ent->addr = str; ent->h = h; DUK_STATS_INC(thr->heap, stats_strtab_litcache_miss); /* Pin the duk_hstring until the next mark-and-sweep. This means * litcache entries don't need to be invalidated until the next * mark-and-sweep as their target duk_hstring is not freed before * the mark-and-sweep happens. The pin remains even if the literal * cache entry is overwritten, and is still useful to avoid string * table traffic. */ if (!DUK_HSTRING_HAS_PINNED_LITERAL(h)) { DUK_DD(DUK_DDPRINT("pin duk_hstring because it is a literal: %!O", (duk_heaphdr *) h)); DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) h)); DUK_HSTRING_INCREF(thr, h); DUK_HSTRING_SET_PINNED_LITERAL(h); DUK_STATS_INC(thr->heap, stats_strtab_litcache_pin); } return h; } #endif /* DUK_USE_LITCACHE_SIZE */ DUK_INTERNAL duk_hstring *duk_heap_strtable_intern_u32_checked(duk_hthread *thr, duk_uint32_t val) { duk_hstring *res; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); res = duk_heap_strtable_intern_u32(thr->heap, val); if (DUK_UNLIKELY(res == NULL)) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return NULL;); } return res; } /* * Remove (unlink) a string from the string table. * * Just unlinks the duk_hstring, leaving link pointers as garbage. * Caller must free the string itself. */ #if defined(DUK_USE_REFERENCE_COUNTING) /* Unlink without a 'prev' pointer. */ DUK_INTERNAL void duk_heap_strtable_unlink(duk_heap *heap, duk_hstring *h) { #if defined(DUK_USE_STRTAB_PTRCOMP) duk_uint16_t *slot; #else duk_hstring **slot; #endif duk_hstring *other; duk_hstring *prev; DUK_DDD(DUK_DDDPRINT("remove: heap=%p, h=%p, blen=%lu, strhash=%lx", (void *) heap, (void *) h, (unsigned long) (h != NULL ? DUK_HSTRING_GET_BYTELEN(h) : 0), (unsigned long) (h != NULL ? DUK_HSTRING_GET_HASH(h) : 0))); DUK_ASSERT(heap != NULL); DUK_ASSERT(h != NULL); #if defined(DUK__STRTAB_RESIZE_CHECK) DUK_ASSERT(heap->st_count > 0); heap->st_count--; #endif #if defined(DUK_USE_STRTAB_PTRCOMP) slot = heap->strtable16 + (DUK_HSTRING_GET_HASH(h) & heap->st_mask); #else slot = heap->strtable + (DUK_HSTRING_GET_HASH(h) & heap->st_mask); #endif other = DUK__HEAPPTR_DEC16(heap, *slot); DUK_ASSERT(other != NULL); /* At least argument string is in the chain. */ prev = NULL; while (other != h) { prev = other; other = other->hdr.h_next; DUK_ASSERT(other != NULL); /* We'll eventually find 'h'. */ } if (prev != NULL) { /* Middle of list. */ prev->hdr.h_next = h->hdr.h_next; } else { /* Head of list. */ *slot = DUK__HEAPPTR_ENC16(heap, h->hdr.h_next); } /* There's no resize check on a string free. The next string * intern will do one. */ } #endif /* DUK_USE_REFERENCE_COUNTING */ /* Unlink with a 'prev' pointer. */ DUK_INTERNAL void duk_heap_strtable_unlink_prev(duk_heap *heap, duk_hstring *h, duk_hstring *prev) { #if defined(DUK_USE_STRTAB_PTRCOMP) duk_uint16_t *slot; #else duk_hstring **slot; #endif DUK_DDD(DUK_DDDPRINT("remove: heap=%p, prev=%p, h=%p, blen=%lu, strhash=%lx", (void *) heap, (void *) prev, (void *) h, (unsigned long) (h != NULL ? DUK_HSTRING_GET_BYTELEN(h) : 0), (unsigned long) (h != NULL ? DUK_HSTRING_GET_HASH(h) : 0))); DUK_ASSERT(heap != NULL); DUK_ASSERT(h != NULL); DUK_ASSERT(prev == NULL || prev->hdr.h_next == h); #if defined(DUK__STRTAB_RESIZE_CHECK) DUK_ASSERT(heap->st_count > 0); heap->st_count--; #endif if (prev != NULL) { /* Middle of list. */ prev->hdr.h_next = h->hdr.h_next; } else { /* Head of list. */ #if defined(DUK_USE_STRTAB_PTRCOMP) slot = heap->strtable16 + (DUK_HSTRING_GET_HASH(h) & heap->st_mask); #else slot = heap->strtable + (DUK_HSTRING_GET_HASH(h) & heap->st_mask); #endif DUK_ASSERT(DUK__HEAPPTR_DEC16(heap, *slot) == h); *slot = DUK__HEAPPTR_ENC16(heap, h->hdr.h_next); } } /* * Force string table resize check in mark-and-sweep. */ DUK_INTERNAL void duk_heap_strtable_force_resize(duk_heap *heap) { /* Does only one grow/shrink step if needed. The heap->st_resizing * flag protects against recursive resizing. */ DUK_ASSERT(heap != NULL); DUK_UNREF(heap); #if defined(DUK__STRTAB_RESIZE_CHECK) #if defined(DUK_USE_STRTAB_PTRCOMP) if (heap->strtable16 != NULL) { #else if (heap->strtable != NULL) { #endif duk__strtable_resize_check(heap); } #endif } /* * Free strings in the string table and the string table itself. */ DUK_INTERNAL void duk_heap_strtable_free(duk_heap *heap) { #if defined(DUK_USE_STRTAB_PTRCOMP) duk_uint16_t *strtable; duk_uint16_t *st; #else duk_hstring **strtable; duk_hstring **st; #endif duk_hstring *h; DUK_ASSERT(heap != NULL); #if defined(DUK_USE_ASSERTIONS) duk__strtable_assert_checks(heap); #endif /* Strtable can be NULL if heap init fails. However, in that case * heap->st_size is 0, so strtable == strtable_end and we skip the * loop without a special check. */ strtable = DUK__GET_STRTABLE(heap); st = strtable + heap->st_size; DUK_ASSERT(strtable != NULL || heap->st_size == 0); while (strtable != st) { --st; h = DUK__HEAPPTR_DEC16(heap, *st); while (h) { duk_hstring *h_next; h_next = h->hdr.h_next; /* Strings may have inner refs (extdata) in some cases. */ duk_free_hstring(heap, h); h = h_next; } } DUK_FREE(heap, strtable); } /* automatic undefs */ #undef DUK__GET_STRTABLE #undef DUK__HEAPPTR_DEC16 #undef DUK__HEAPPTR_ENC16 #undef DUK__STRTAB_U32_MAX_STRLEN /* * duk_heaphdr assertion helpers */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_ASSERTIONS) #if defined(DUK_USE_DOUBLE_LINKED_HEAP) DUK_INTERNAL void duk_heaphdr_assert_links(duk_heap *heap, duk_heaphdr *h) { DUK_UNREF(heap); if (h != NULL) { duk_heaphdr *h_prev, *h_next; h_prev = DUK_HEAPHDR_GET_PREV(heap, h); h_next = DUK_HEAPHDR_GET_NEXT(heap, h); DUK_ASSERT(h_prev == NULL || (DUK_HEAPHDR_GET_NEXT(heap, h_prev) == h)); DUK_ASSERT(h_next == NULL || (DUK_HEAPHDR_GET_PREV(heap, h_next) == h)); } } #else DUK_INTERNAL void duk_heaphdr_assert_links(duk_heap *heap, duk_heaphdr *h) { DUK_UNREF(heap); DUK_UNREF(h); } #endif DUK_INTERNAL void duk_heaphdr_assert_valid(duk_heaphdr *h) { DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h)); } /* Assert validity of a heaphdr, including all subclasses. */ DUK_INTERNAL void duk_heaphdr_assert_valid_subclassed(duk_heaphdr *h) { switch (DUK_HEAPHDR_GET_TYPE(h)) { case DUK_HTYPE_OBJECT: { duk_hobject *h_obj = (duk_hobject *) h; DUK_HOBJECT_ASSERT_VALID(h_obj); if (DUK_HOBJECT_IS_COMPFUNC(h_obj)) { DUK_HCOMPFUNC_ASSERT_VALID((duk_hcompfunc *) h_obj); } else if (DUK_HOBJECT_IS_NATFUNC(h_obj)) { DUK_HNATFUNC_ASSERT_VALID((duk_hnatfunc *) h_obj); } else if (DUK_HOBJECT_IS_DECENV(h_obj)) { DUK_HDECENV_ASSERT_VALID((duk_hdecenv *) h_obj); } else if (DUK_HOBJECT_IS_OBJENV(h_obj)) { DUK_HOBJENV_ASSERT_VALID((duk_hobjenv *) h_obj); } else if (DUK_HOBJECT_IS_BUFOBJ(h_obj)) { #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_HBUFOBJ_ASSERT_VALID((duk_hbufobj *) h_obj); #endif } else if (DUK_HOBJECT_IS_BOUNDFUNC(h_obj)) { DUK_HBOUNDFUNC_ASSERT_VALID((duk_hboundfunc *) h_obj); } else if (DUK_HOBJECT_IS_PROXY(h_obj)) { DUK_HPROXY_ASSERT_VALID((duk_hproxy *) h_obj); } else if (DUK_HOBJECT_IS_THREAD(h_obj)) { DUK_HTHREAD_ASSERT_VALID((duk_hthread *) h_obj); } else { /* Just a plain object. */ ; } break; } case DUK_HTYPE_STRING: { duk_hstring *h_str = (duk_hstring *) h; DUK_HSTRING_ASSERT_VALID(h_str); break; } case DUK_HTYPE_BUFFER: { duk_hbuffer *h_buf = (duk_hbuffer *) h; DUK_HBUFFER_ASSERT_VALID(h_buf); break; } default: { DUK_ASSERT(0); } } } #endif /* DUK_USE_ASSERTIONS */ /* * Hobject allocation. * * Provides primitive allocation functions for all object types (plain object, * compiled function, native function, thread). The object return is not yet * in "heap allocated" list and has a refcount of zero, so caller must careful. */ /* XXX: In most cases there's no need for plain allocation without pushing * to the value stack. Maybe rework contract? */ /* #include duk_internal.h -> already included */ /* * Helpers. */ DUK_LOCAL void duk__init_object_parts(duk_heap *heap, duk_uint_t hobject_flags, duk_hobject *obj) { DUK_ASSERT(obj != NULL); /* Zeroed by caller. */ obj->hdr.h_flags = hobject_flags | DUK_HTYPE_OBJECT; DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(&obj->hdr) == DUK_HTYPE_OBJECT); /* Assume zero shift. */ #if defined(DUK_USE_EXPLICIT_NULL_INIT) DUK_HOBJECT_SET_PROTOTYPE(heap, obj, NULL); DUK_HOBJECT_SET_PROPS(heap, obj, NULL); #endif #if defined(DUK_USE_HEAPPTR16) /* Zero encoded pointer is required to match NULL. */ DUK_HEAPHDR_SET_NEXT(heap, &obj->hdr, NULL); #if defined(DUK_USE_DOUBLE_LINKED_HEAP) DUK_HEAPHDR_SET_PREV(heap, &obj->hdr, NULL); #endif #endif DUK_HEAPHDR_ASSERT_LINKS(heap, &obj->hdr); DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap, &obj->hdr); /* obj->props is intentionally left as NULL, and duk_hobject_props.c must deal * with this properly. This is intentional: empty objects consume a minimum * amount of memory. Further, an initial allocation might fail and cause * 'obj' to "leak" (require a mark-and-sweep) since it is not reachable yet. */ } DUK_LOCAL void *duk__hobject_alloc_init(duk_hthread *thr, duk_uint_t hobject_flags, duk_size_t size) { void *res; res = (void *) DUK_ALLOC_CHECKED_ZEROED(thr, size); DUK_ASSERT(res != NULL); duk__init_object_parts(thr->heap, hobject_flags, (duk_hobject *) res); return res; } /* * Allocate an duk_hobject. * * The allocated object has no allocation for properties; the caller may * want to force a resize if a desired size is known. * * The allocated object has zero reference count and is not reachable. * The caller MUST make the object reachable and increase its reference * count before invoking any operation that might require memory allocation. */ DUK_INTERNAL duk_hobject *duk_hobject_alloc_unchecked(duk_heap *heap, duk_uint_t hobject_flags) { duk_hobject *res; DUK_ASSERT(heap != NULL); /* different memory layout, alloc size, and init */ DUK_ASSERT((hobject_flags & DUK_HOBJECT_FLAG_COMPFUNC) == 0); DUK_ASSERT((hobject_flags & DUK_HOBJECT_FLAG_NATFUNC) == 0); DUK_ASSERT((hobject_flags & DUK_HOBJECT_FLAG_BOUNDFUNC) == 0); res = (duk_hobject *) DUK_ALLOC_ZEROED(heap, sizeof(duk_hobject)); if (DUK_UNLIKELY(res == NULL)) { return NULL; } DUK_ASSERT(!DUK_HOBJECT_IS_THREAD(res)); duk__init_object_parts(heap, hobject_flags, res); DUK_ASSERT(!DUK_HOBJECT_IS_THREAD(res)); return res; } DUK_INTERNAL duk_hobject *duk_hobject_alloc(duk_hthread *thr, duk_uint_t hobject_flags) { duk_hobject *res; res = (duk_hobject *) duk__hobject_alloc_init(thr, hobject_flags, sizeof(duk_hobject)); return res; } DUK_INTERNAL duk_hcompfunc *duk_hcompfunc_alloc(duk_hthread *thr, duk_uint_t hobject_flags) { duk_hcompfunc *res; res = (duk_hcompfunc *) duk__hobject_alloc_init(thr, hobject_flags, sizeof(duk_hcompfunc)); #if defined(DUK_USE_EXPLICIT_NULL_INIT) #if defined(DUK_USE_HEAPPTR16) /* NULL pointer is required to encode to zero, so memset is enough. */ #else res->data = NULL; res->funcs = NULL; res->bytecode = NULL; #endif res->lex_env = NULL; res->var_env = NULL; #endif return res; } DUK_INTERNAL duk_hnatfunc *duk_hnatfunc_alloc(duk_hthread *thr, duk_uint_t hobject_flags) { duk_hnatfunc *res; res = (duk_hnatfunc *) duk__hobject_alloc_init(thr, hobject_flags, sizeof(duk_hnatfunc)); #if defined(DUK_USE_EXPLICIT_NULL_INIT) res->func = NULL; #endif return res; } DUK_INTERNAL duk_hboundfunc *duk_hboundfunc_alloc(duk_heap *heap, duk_uint_t hobject_flags) { duk_hboundfunc *res; res = (duk_hboundfunc *) DUK_ALLOC(heap, sizeof(duk_hboundfunc)); if (!res) { return NULL; } duk_memzero(res, sizeof(duk_hboundfunc)); duk__init_object_parts(heap, hobject_flags, &res->obj); DUK_TVAL_SET_UNDEFINED(&res->target); DUK_TVAL_SET_UNDEFINED(&res->this_binding); #if defined(DUK_USE_EXPLICIT_NULL_INIT) res->args = NULL; #endif return res; } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL duk_hbufobj *duk_hbufobj_alloc(duk_hthread *thr, duk_uint_t hobject_flags) { duk_hbufobj *res; res = (duk_hbufobj *) duk__hobject_alloc_init(thr, hobject_flags, sizeof(duk_hbufobj)); #if defined(DUK_USE_EXPLICIT_NULL_INIT) res->buf = NULL; res->buf_prop = NULL; #endif DUK_HBUFOBJ_ASSERT_VALID(res); return res; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* Allocate a new thread. * * Leaves the built-ins array uninitialized. The caller must either * initialize a new global context or share existing built-ins from * another thread. */ DUK_INTERNAL duk_hthread *duk_hthread_alloc_unchecked(duk_heap *heap, duk_uint_t hobject_flags) { duk_hthread *res; res = (duk_hthread *) DUK_ALLOC(heap, sizeof(duk_hthread)); if (DUK_UNLIKELY(res == NULL)) { return NULL; } duk_memzero(res, sizeof(duk_hthread)); duk__init_object_parts(heap, hobject_flags, &res->obj); #if defined(DUK_USE_EXPLICIT_NULL_INIT) res->ptr_curr_pc = NULL; res->heap = NULL; res->valstack = NULL; res->valstack_end = NULL; res->valstack_alloc_end = NULL; res->valstack_bottom = NULL; res->valstack_top = NULL; res->callstack_curr = NULL; res->resumer = NULL; res->compile_ctx = NULL, #if defined(DUK_USE_HEAPPTR16) res->strs16 = NULL; #else res->strs = NULL; #endif { duk_small_uint_t i; for (i = 0; i < DUK_NUM_BUILTINS; i++) { res->builtins[i] = NULL; } } #endif /* When nothing is running, API calls are in non-strict mode. */ DUK_ASSERT(res->strict == 0); res->heap = heap; /* XXX: Any reason not to merge duk_hthread_alloc.c here? */ return res; } DUK_INTERNAL duk_hthread *duk_hthread_alloc(duk_hthread *thr, duk_uint_t hobject_flags) { duk_hthread *res; res = duk_hthread_alloc_unchecked(thr->heap, hobject_flags); if (res == NULL) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return NULL;); } return res; } DUK_INTERNAL duk_harray *duk_harray_alloc(duk_hthread *thr, duk_uint_t hobject_flags) { duk_harray *res; res = (duk_harray *) duk__hobject_alloc_init(thr, hobject_flags, sizeof(duk_harray)); DUK_ASSERT(res->length == 0); return res; } DUK_INTERNAL duk_hdecenv *duk_hdecenv_alloc(duk_hthread *thr, duk_uint_t hobject_flags) { duk_hdecenv *res; res = (duk_hdecenv *) duk__hobject_alloc_init(thr, hobject_flags, sizeof(duk_hdecenv)); #if defined(DUK_USE_EXPLICIT_NULL_INIT) res->thread = NULL; res->varmap = NULL; #endif DUK_ASSERT(res->thread == NULL); DUK_ASSERT(res->varmap == NULL); DUK_ASSERT(res->regbase_byteoff == 0); return res; } DUK_INTERNAL duk_hobjenv *duk_hobjenv_alloc(duk_hthread *thr, duk_uint_t hobject_flags) { duk_hobjenv *res; res = (duk_hobjenv *) duk__hobject_alloc_init(thr, hobject_flags, sizeof(duk_hobjenv)); #if defined(DUK_USE_EXPLICIT_NULL_INIT) res->target = NULL; #endif DUK_ASSERT(res->target == NULL); return res; } DUK_INTERNAL duk_hproxy *duk_hproxy_alloc(duk_hthread *thr, duk_uint_t hobject_flags) { duk_hproxy *res; res = (duk_hproxy *) duk__hobject_alloc_init(thr, hobject_flags, sizeof(duk_hproxy)); /* Leave ->target and ->handler uninitialized, as caller will always * explicitly initialize them before any side effects are possible. */ return res; } /* * duk_hobject and subclass assertion helpers */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL void duk_hobject_assert_valid(duk_hobject *h) { DUK_ASSERT(h != NULL); DUK_ASSERT(!DUK_HOBJECT_IS_CALLABLE(h) || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_FUNCTION); DUK_ASSERT(!DUK_HOBJECT_IS_BUFOBJ(h) || (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAYBUFFER || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_DATAVIEW || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_INT8ARRAY || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_UINT8ARRAY || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_INT16ARRAY || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_UINT16ARRAY || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_INT32ARRAY || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_UINT32ARRAY || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_FLOAT32ARRAY || DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_FLOAT64ARRAY)); /* Object is an Array <=> object has exotic array behavior */ DUK_ASSERT((DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY && DUK_HOBJECT_HAS_EXOTIC_ARRAY(h)) || (DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_ARRAY && !DUK_HOBJECT_HAS_EXOTIC_ARRAY(h))); } DUK_INTERNAL void duk_harray_assert_valid(duk_harray *h) { DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HOBJECT_IS_ARRAY((duk_hobject *) h)); DUK_ASSERT(DUK_HOBJECT_HAS_EXOTIC_ARRAY((duk_hobject *) h)); } DUK_INTERNAL void duk_hboundfunc_assert_valid(duk_hboundfunc *h) { DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HOBJECT_IS_BOUNDFUNC((duk_hobject *) h)); DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(&h->target) || (DUK_TVAL_IS_OBJECT(&h->target) && DUK_HOBJECT_IS_CALLABLE(DUK_TVAL_GET_OBJECT(&h->target)))); DUK_ASSERT(!DUK_TVAL_IS_UNUSED(&h->this_binding)); DUK_ASSERT(h->nargs == 0 || h->args != NULL); } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_INTERNAL void duk_hbufobj_assert_valid(duk_hbufobj *h) { DUK_ASSERT(h != NULL); DUK_ASSERT(h->shift <= 3); DUK_ASSERT(h->elem_type <= DUK_HBUFOBJ_ELEM_MAX); DUK_ASSERT((h->shift == 0 && h->elem_type == DUK_HBUFOBJ_ELEM_UINT8) || (h->shift == 0 && h->elem_type == DUK_HBUFOBJ_ELEM_UINT8CLAMPED) || (h->shift == 0 && h->elem_type == DUK_HBUFOBJ_ELEM_INT8) || (h->shift == 1 && h->elem_type == DUK_HBUFOBJ_ELEM_UINT16) || (h->shift == 1 && h->elem_type == DUK_HBUFOBJ_ELEM_INT16) || (h->shift == 2 && h->elem_type == DUK_HBUFOBJ_ELEM_UINT32) || (h->shift == 2 && h->elem_type == DUK_HBUFOBJ_ELEM_INT32) || (h->shift == 2 && h->elem_type == DUK_HBUFOBJ_ELEM_FLOAT32) || (h->shift == 3 && h->elem_type == DUK_HBUFOBJ_ELEM_FLOAT64)); DUK_ASSERT(h->is_typedarray == 0 || h->is_typedarray == 1); DUK_ASSERT(DUK_HOBJECT_IS_BUFOBJ((duk_hobject *) h)); if (h->buf == NULL) { DUK_ASSERT(h->offset == 0); DUK_ASSERT(h->length == 0); } else { /* No assertions for offset or length; in particular, * it's OK for length to be longer than underlying * buffer. Just ensure they don't wrap when added. */ DUK_ASSERT(h->offset + h->length >= h->offset); } } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ DUK_INTERNAL void duk_hcompfunc_assert_valid(duk_hcompfunc *h) { DUK_ASSERT(h != NULL); } DUK_INTERNAL void duk_hnatfunc_assert_valid(duk_hnatfunc *h) { DUK_ASSERT(h != NULL); } DUK_INTERNAL void duk_hdecenv_assert_valid(duk_hdecenv *h) { DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HOBJECT_IS_DECENV((duk_hobject *) h)); DUK_ASSERT(h->thread == NULL || h->varmap != NULL); } DUK_INTERNAL void duk_hobjenv_assert_valid(duk_hobjenv *h) { DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HOBJECT_IS_OBJENV((duk_hobject *) h)); DUK_ASSERT(h->target != NULL); DUK_ASSERT(h->has_this == 0 || h->has_this == 1); } DUK_INTERNAL void duk_hproxy_assert_valid(duk_hproxy *h) { DUK_ASSERT(h != NULL); DUK_ASSERT(h->target != NULL); DUK_ASSERT(h->handler != NULL); DUK_ASSERT(DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ((duk_hobject *) h)); } DUK_INTERNAL void duk_hthread_assert_valid(duk_hthread *thr) { DUK_ASSERT(thr != NULL); DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) thr) == DUK_HTYPE_OBJECT); DUK_ASSERT(DUK_HOBJECT_IS_THREAD((duk_hobject *) thr)); DUK_ASSERT(thr->unused1 == 0); DUK_ASSERT(thr->unused2 == 0); } DUK_INTERNAL void duk_ctx_assert_valid(duk_hthread *thr) { DUK_ASSERT(thr != NULL); DUK_HTHREAD_ASSERT_VALID(thr); DUK_ASSERT(thr->valstack != NULL); DUK_ASSERT(thr->valstack_bottom != NULL); DUK_ASSERT(thr->valstack_top != NULL); DUK_ASSERT(thr->valstack_end != NULL); DUK_ASSERT(thr->valstack_alloc_end != NULL); DUK_ASSERT(thr->valstack_alloc_end >= thr->valstack); DUK_ASSERT(thr->valstack_end >= thr->valstack); DUK_ASSERT(thr->valstack_top >= thr->valstack); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT(thr->valstack_end >= thr->valstack_top); DUK_ASSERT(thr->valstack_alloc_end >= thr->valstack_end); } #endif /* DUK_USE_ASSERTIONS */ /* * Object enumeration support. * * Creates an internal enumeration state object to be used e.g. with for-in * enumeration. The state object contains a snapshot of target object keys * and internal control state for enumeration. Enumerator flags allow caller * to e.g. request internal/non-enumerable properties, and to enumerate only * "own" properties. * * Also creates the result value for e.g. Object.keys() based on the same * internal structure. * * This snapshot-based enumeration approach is used to simplify enumeration: * non-snapshot-based approaches are difficult to reconcile with mutating * the enumeration target, running multiple long-lived enumerators at the * same time, garbage collection details, etc. The downside is that the * enumerator object is memory inefficient especially for iterating arrays. */ /* #include duk_internal.h -> already included */ /* XXX: identify enumeration target with an object index (not top of stack) */ /* First enumerated key index in enumerator object, must match exactly the * number of control properties inserted to the enumerator. */ #define DUK__ENUM_START_INDEX 2 /* Current implementation suffices for ES2015 for now because there's no symbol * sorting, so commented out for now. */ /* * Helper to sort enumeration keys using a callback for pairwise duk_hstring * comparisons. The keys are in the enumeration object entry part, starting * from DUK__ENUM_START_INDEX, and the entry part is dense. Entry part values * are all "true", e.g. "1" -> true, "3" -> true, "foo" -> true, "2" -> true, * so it suffices to just switch keys without switching values. * * ES2015 [[OwnPropertyKeys]] enumeration order for ordinary objects: * (1) array indices in ascending order, * (2) non-array-index keys in insertion order, and * (3) symbols in insertion order. * http://www.ecma-international.org/ecma-262/6.0/#sec-ordinary-object-internal-methods-and-internal-slots-ownpropertykeys. * * This rule is applied to "own properties" at each inheritance level; * non-duplicate parent keys always follow child keys. For example, * an inherited array index will enumerate -after- a symbol in the * child. * * Insertion sort is used because (1) it's simple and compact, (2) works * in-place, (3) minimizes operations if data is already nearly sorted, * (4) doesn't reorder elements considered equal. * http://en.wikipedia.org/wiki/Insertion_sort */ /* Sort key, must hold array indices, "not array index" marker, and one more * higher value for symbols. */ #if !defined(DUK_USE_SYMBOL_BUILTIN) typedef duk_uint32_t duk__sort_key_t; #elif defined(DUK_USE_64BIT_OPS) typedef duk_uint64_t duk__sort_key_t; #else typedef duk_double_t duk__sort_key_t; #endif /* Get sort key for a duk_hstring. */ DUK_LOCAL duk__sort_key_t duk__hstring_sort_key(duk_hstring *x) { duk__sort_key_t val; /* For array indices [0,0xfffffffe] use the array index as is. * For strings, use 0xffffffff, the marker 'arridx' already in * duk_hstring. For symbols, any value above 0xffffffff works, * as long as it is the same for all symbols; currently just add * the masked flag field into the arridx temporary. */ DUK_ASSERT(x != NULL); DUK_ASSERT(!DUK_HSTRING_HAS_SYMBOL(x) || DUK_HSTRING_GET_ARRIDX_FAST(x) == DUK_HSTRING_NO_ARRAY_INDEX); val = (duk__sort_key_t) DUK_HSTRING_GET_ARRIDX_FAST(x); #if defined(DUK_USE_SYMBOL_BUILTIN) val = val + (duk__sort_key_t) (DUK_HEAPHDR_GET_FLAGS_RAW((duk_heaphdr *) x) & DUK_HSTRING_FLAG_SYMBOL); #endif return (duk__sort_key_t) val; } /* Insert element 'b' after element 'a'? */ DUK_LOCAL duk_bool_t duk__sort_compare_es6(duk_hstring *a, duk_hstring *b, duk__sort_key_t val_b) { duk__sort_key_t val_a; DUK_ASSERT(a != NULL); DUK_ASSERT(b != NULL); DUK_UNREF(b); /* Not actually needed now, val_b suffices. */ val_a = duk__hstring_sort_key(a); if (val_a > val_b) { return 0; } else { return 1; } } DUK_LOCAL void duk__sort_enum_keys_es6(duk_hthread *thr, duk_hobject *h_obj, duk_int_fast32_t idx_start, duk_int_fast32_t idx_end) { duk_hstring **keys; duk_int_fast32_t idx; DUK_ASSERT(h_obj != NULL); DUK_ASSERT(idx_start >= DUK__ENUM_START_INDEX); DUK_ASSERT(idx_end >= idx_start); DUK_UNREF(thr); if (idx_end <= idx_start + 1) { return; /* Zero or one element(s). */ } keys = DUK_HOBJECT_E_GET_KEY_BASE(thr->heap, h_obj); for (idx = idx_start + 1; idx < idx_end; idx++) { duk_hstring *h_curr; duk_int_fast32_t idx_insert; duk__sort_key_t val_curr; h_curr = keys[idx]; DUK_ASSERT(h_curr != NULL); /* Scan backwards for insertion place. This works very well * when the elements are nearly in order which is the common * (and optimized for) case. */ val_curr = duk__hstring_sort_key(h_curr); /* Remains same during scanning. */ for (idx_insert = idx - 1; idx_insert >= idx_start; idx_insert--) { duk_hstring *h_insert; h_insert = keys[idx_insert]; DUK_ASSERT(h_insert != NULL); if (duk__sort_compare_es6(h_insert, h_curr, val_curr)) { break; } } /* If we're out of indices, idx_insert == idx_start - 1 and idx_insert++ * brings us back to idx_start. */ idx_insert++; DUK_ASSERT(idx_insert >= 0 && idx_insert <= idx); /* .-- p_insert .-- p_curr * v v * | ... | insert | ... | curr */ /* This could also done when the keys are in order, i.e. * idx_insert == idx. The result would be an unnecessary * memmove() but we use an explicit check because the keys * are very often in order already. */ if (idx != idx_insert) { duk_memmove((void *) (keys + idx_insert + 1), (const void *) (keys + idx_insert), ((size_t) (idx - idx_insert) * sizeof(duk_hstring *))); keys[idx_insert] = h_curr; } } } /* * Create an internal enumerator object E, which has its keys ordered * to match desired enumeration ordering. Also initialize internal control * properties for enumeration. * * Note: if an array was used to hold enumeration keys instead, an array * scan would be needed to eliminate duplicates found in the prototype chain. */ DUK_LOCAL void duk__add_enum_key(duk_hthread *thr, duk_hstring *k) { /* 'k' may be unreachable on entry so must push without any * potential for GC. */ duk_push_hstring(thr, k); duk_push_true(thr); duk_put_prop(thr, -3); } DUK_LOCAL void duk__add_enum_key_stridx(duk_hthread *thr, duk_small_uint_t stridx) { duk__add_enum_key(thr, DUK_HTHREAD_GET_STRING(thr, stridx)); } DUK_INTERNAL void duk_hobject_enumerator_create(duk_hthread *thr, duk_small_uint_t enum_flags) { duk_hobject *enum_target; duk_hobject *curr; duk_hobject *res; #if defined(DUK_USE_ES6_PROXY) duk_hobject *h_proxy_target; duk_hobject *h_proxy_handler; duk_hobject *h_trap_result; #endif duk_uint_fast32_t i, len; /* used for array, stack, and entry indices */ duk_uint_fast32_t sort_start_index; DUK_ASSERT(thr != NULL); enum_target = duk_require_hobject(thr, -1); DUK_ASSERT(enum_target != NULL); duk_push_bare_object(thr); res = duk_known_hobject(thr, -1); /* [enum_target res] */ /* Target must be stored so that we can recheck whether or not * keys still exist when we enumerate. This is not done if the * enumeration result comes from a proxy trap as there is no * real object to check against. */ duk_push_hobject(thr, enum_target); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_INT_TARGET); /* Target is bare, plain put OK. */ /* Initialize index so that we skip internal control keys. */ duk_push_int(thr, DUK__ENUM_START_INDEX); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_INT_NEXT); /* Target is bare, plain put OK. */ /* * Proxy object handling */ #if defined(DUK_USE_ES6_PROXY) if (DUK_LIKELY((enum_flags & DUK_ENUM_NO_PROXY_BEHAVIOR) != 0)) { goto skip_proxy; } if (DUK_LIKELY(!duk_hobject_proxy_check(enum_target, &h_proxy_target, &h_proxy_handler))) { goto skip_proxy; } /* XXX: share code with Object.keys() Proxy handling */ /* In ES2015 for-in invoked the "enumerate" trap; in ES2016 "enumerate" * has been obsoleted and "ownKeys" is used instead. */ DUK_DDD(DUK_DDDPRINT("proxy enumeration")); duk_push_hobject(thr, h_proxy_handler); if (!duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_OWN_KEYS)) { /* No need to replace the 'enum_target' value in stack, only the * enum_target reference. This also ensures that the original * enum target is reachable, which keeps the proxy and the proxy * target reachable. We do need to replace the internal _Target. */ DUK_DDD(DUK_DDDPRINT("no ownKeys trap, enumerate proxy target instead")); DUK_DDD(DUK_DDDPRINT("h_proxy_target=%!O", (duk_heaphdr *) h_proxy_target)); enum_target = h_proxy_target; duk_push_hobject(thr, enum_target); /* -> [ ... enum_target res handler undefined target ] */ duk_put_prop_stridx_short(thr, -4, DUK_STRIDX_INT_TARGET); /* Target is bare, plain put OK. */ duk_pop_2(thr); /* -> [ ... enum_target res ] */ goto skip_proxy; } /* [ ... enum_target res handler trap ] */ duk_insert(thr, -2); duk_push_hobject(thr, h_proxy_target); /* -> [ ... enum_target res trap handler target ] */ duk_call_method(thr, 1 /*nargs*/); /* -> [ ... enum_target res trap_result ] */ h_trap_result = duk_require_hobject(thr, -1); DUK_UNREF(h_trap_result); duk_proxy_ownkeys_postprocess(thr, h_proxy_target, enum_flags); /* -> [ ... enum_target res trap_result keys_array ] */ /* Copy cleaned up trap result keys into the enumerator object. */ /* XXX: result is a dense array; could make use of that. */ DUK_ASSERT(duk_is_array(thr, -1)); len = (duk_uint_fast32_t) duk_get_length(thr, -1); for (i = 0; i < len; i++) { (void) duk_get_prop_index(thr, -1, (duk_uarridx_t) i); DUK_ASSERT(duk_is_string(thr, -1)); /* postprocess cleaned up */ /* [ ... enum_target res trap_result keys_array val ] */ duk_push_true(thr); /* [ ... enum_target res trap_result keys_array val true ] */ duk_put_prop(thr, -5); } /* [ ... enum_target res trap_result keys_array ] */ duk_pop_2(thr); duk_remove_m2(thr); /* [ ... res ] */ /* The internal _Target property is kept pointing to the original * enumeration target (the proxy object), so that the enumerator * 'next' operation can read property values if so requested. The * fact that the _Target is a proxy disables key existence check * during enumeration. */ DUK_DDD(DUK_DDDPRINT("proxy enumeration, final res: %!O", (duk_heaphdr *) res)); goto compact_and_return; skip_proxy: #endif /* DUK_USE_ES6_PROXY */ curr = enum_target; sort_start_index = DUK__ENUM_START_INDEX; DUK_ASSERT(DUK_HOBJECT_GET_ENEXT(res) == DUK__ENUM_START_INDEX); while (curr) { duk_uint_fast32_t sort_end_index; #if !defined(DUK_USE_PREFER_SIZE) duk_bool_t need_sort = 0; #endif duk_bool_t cond; /* Enumeration proceeds by inheritance level. Virtual * properties need to be handled specially, followed by * array part, and finally entry part. * * If there are array index keys in the entry part or any * other risk of the ES2015 [[OwnPropertyKeys]] order being * violated, need_sort is set and an explicit ES2015 sort is * done for the inheritance level. */ /* XXX: inheriting from proxy */ /* * Virtual properties. * * String and buffer indices are virtual and always enumerable, * 'length' is virtual and non-enumerable. Array and arguments * object props have special behavior but are concrete. * * String and buffer objects don't have an array part so as long * as virtual array index keys are enumerated first, we don't * need to set need_sort. */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) cond = DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(curr) || DUK_HOBJECT_IS_BUFOBJ(curr); #else cond = DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(curr); #endif cond = cond && !(enum_flags & DUK_ENUM_EXCLUDE_STRINGS); if (cond) { duk_bool_t have_length = 1; /* String and buffer enumeration behavior is identical now, * so use shared handler. */ if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(curr)) { duk_hstring *h_val; h_val = duk_hobject_get_internal_value_string(thr->heap, curr); DUK_ASSERT(h_val != NULL); /* string objects must not created without internal value */ len = (duk_uint_fast32_t) DUK_HSTRING_GET_CHARLEN(h_val); } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) else { duk_hbufobj *h_bufobj; DUK_ASSERT(DUK_HOBJECT_IS_BUFOBJ(curr)); h_bufobj = (duk_hbufobj *) curr; if (h_bufobj == NULL || !h_bufobj->is_typedarray) { /* Zero length seems like a good behavior for neutered buffers. * ArrayBuffer (non-view) and DataView don't have index properties * or .length property. */ len = 0; have_length = 0; } else { /* There's intentionally no check for * current underlying buffer length. */ len = (duk_uint_fast32_t) (h_bufobj->length >> h_bufobj->shift); } } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ for (i = 0; i < len; i++) { duk_hstring *k; /* This is a bit fragile: the string is not * reachable until it is pushed by the helper. */ k = duk_heap_strtable_intern_u32_checked(thr, (duk_uint32_t) i); DUK_ASSERT(k); duk__add_enum_key(thr, k); /* [enum_target res] */ } /* 'length' and other virtual properties are not * enumerable, but are included if non-enumerable * properties are requested. */ if (have_length && (enum_flags & DUK_ENUM_INCLUDE_NONENUMERABLE)) { duk__add_enum_key_stridx(thr, DUK_STRIDX_LENGTH); } } /* * Array part */ cond = !(enum_flags & DUK_ENUM_EXCLUDE_STRINGS); if (cond) { for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(curr); i++) { duk_hstring *k; duk_tval *tv; tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, curr, i); if (DUK_TVAL_IS_UNUSED(tv)) { continue; } k = duk_heap_strtable_intern_u32_checked(thr, (duk_uint32_t) i); /* Fragile reachability. */ DUK_ASSERT(k); duk__add_enum_key(thr, k); /* [enum_target res] */ } if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(curr)) { /* Array .length comes after numeric indices. */ if (enum_flags & DUK_ENUM_INCLUDE_NONENUMERABLE) { duk__add_enum_key_stridx(thr, DUK_STRIDX_LENGTH); } } } /* * Entries part */ for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(curr); i++) { duk_hstring *k; k = DUK_HOBJECT_E_GET_KEY(thr->heap, curr, i); if (!k) { continue; } if (!(enum_flags & DUK_ENUM_INCLUDE_NONENUMERABLE) && !DUK_HOBJECT_E_SLOT_IS_ENUMERABLE(thr->heap, curr, i)) { continue; } if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(k))) { if (!(enum_flags & DUK_ENUM_INCLUDE_HIDDEN) && DUK_HSTRING_HAS_HIDDEN(k)) { continue; } if (!(enum_flags & DUK_ENUM_INCLUDE_SYMBOLS)) { continue; } #if !defined(DUK_USE_PREFER_SIZE) need_sort = 1; #endif } else { DUK_ASSERT(!DUK_HSTRING_HAS_HIDDEN(k)); /* would also have symbol flag */ if (enum_flags & DUK_ENUM_EXCLUDE_STRINGS) { continue; } } if (DUK_HSTRING_HAS_ARRIDX(k)) { /* This in currently only possible if the * object has no array part: the array part * is exhaustive when it is present. */ #if !defined(DUK_USE_PREFER_SIZE) need_sort = 1; #endif } else { if (enum_flags & DUK_ENUM_ARRAY_INDICES_ONLY) { continue; } } DUK_ASSERT(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, curr, i) || !DUK_TVAL_IS_UNUSED(&DUK_HOBJECT_E_GET_VALUE_PTR(thr->heap, curr, i)->v)); duk__add_enum_key(thr, k); /* [enum_target res] */ } /* Sort enumerated keys according to ES2015 requirements for * the "inheritance level" just processed. This is far from * optimal, ES2015 semantics could be achieved more efficiently * by handling array index string keys (and symbol keys) * specially above in effect doing the sort inline. * * Skip the sort if array index sorting is requested because * we must consider all keys, also inherited, so an explicit * sort is done for the whole result after we're done with the * prototype chain. * * Also skip the sort if need_sort == 0, i.e. we know for * certain that the enumerated order is already correct. */ sort_end_index = DUK_HOBJECT_GET_ENEXT(res); if (!(enum_flags & DUK_ENUM_SORT_ARRAY_INDICES)) { #if defined(DUK_USE_PREFER_SIZE) duk__sort_enum_keys_es6(thr, res, (duk_int_fast32_t) sort_start_index, (duk_int_fast32_t) sort_end_index); #else if (need_sort) { DUK_DDD(DUK_DDDPRINT("need to sort")); duk__sort_enum_keys_es6(thr, res, (duk_int_fast32_t) sort_start_index, (duk_int_fast32_t) sort_end_index); } else { DUK_DDD(DUK_DDDPRINT("no need to sort")); } #endif } sort_start_index = sort_end_index; if (enum_flags & DUK_ENUM_OWN_PROPERTIES_ONLY) { break; } curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, curr); } /* [enum_target res] */ duk_remove_m2(thr); /* [res] */ if (enum_flags & DUK_ENUM_SORT_ARRAY_INDICES) { /* Some E5/E5.1 algorithms require that array indices are iterated * in a strictly ascending order. This is the case for e.g. * Array.prototype.forEach() and JSON.stringify() PropertyList * handling. The caller can request an explicit sort in these * cases. */ /* Sort to ES2015 order which works for pure array incides but * also for mixed keys. */ duk__sort_enum_keys_es6(thr, res, (duk_int_fast32_t) DUK__ENUM_START_INDEX, (duk_int_fast32_t) DUK_HOBJECT_GET_ENEXT(res)); } #if defined(DUK_USE_ES6_PROXY) compact_and_return: #endif /* compact; no need to seal because object is internal */ duk_hobject_compact_props(thr, res); DUK_DDD(DUK_DDDPRINT("created enumerator object: %!iT", (duk_tval *) duk_get_tval(thr, -1))); } /* * Returns non-zero if a key and/or value was enumerated, and: * * [enum] -> [key] (get_value == 0) * [enum] -> [key value] (get_value == 1) * * Returns zero without pushing anything on the stack otherwise. */ DUK_INTERNAL duk_bool_t duk_hobject_enumerator_next(duk_hthread *thr, duk_bool_t get_value) { duk_hobject *e; duk_hobject *enum_target; duk_hstring *res = NULL; duk_uint_fast32_t idx; duk_bool_t check_existence; DUK_ASSERT(thr != NULL); /* [... enum] */ e = duk_require_hobject(thr, -1); /* XXX use get tval ptr, more efficient */ duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_INT_NEXT); idx = (duk_uint_fast32_t) duk_require_uint(thr, -1); duk_pop(thr); DUK_DDD(DUK_DDDPRINT("enumeration: index is: %ld", (long) idx)); /* Enumeration keys are checked against the enumeration target (to see * that they still exist). In the proxy enumeration case _Target will * be the proxy, and checking key existence against the proxy is not * required (or sensible, as the keys may be fully virtual). */ duk_xget_owndataprop_stridx_short(thr, -1, DUK_STRIDX_INT_TARGET); enum_target = duk_require_hobject(thr, -1); DUK_ASSERT(enum_target != NULL); #if defined(DUK_USE_ES6_PROXY) check_existence = (!DUK_HOBJECT_IS_PROXY(enum_target)); #else check_existence = 1; #endif duk_pop(thr); /* still reachable */ DUK_DDD(DUK_DDDPRINT("getting next enum value, enum_target=%!iO, enumerator=%!iT", (duk_heaphdr *) enum_target, (duk_tval *) duk_get_tval(thr, -1))); /* no array part */ for (;;) { duk_hstring *k; if (idx >= DUK_HOBJECT_GET_ENEXT(e)) { DUK_DDD(DUK_DDDPRINT("enumeration: ran out of elements")); break; } /* we know these because enum objects are internally created */ k = DUK_HOBJECT_E_GET_KEY(thr->heap, e, idx); DUK_ASSERT(k != NULL); DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, e, idx)); DUK_ASSERT(!DUK_TVAL_IS_UNUSED(&DUK_HOBJECT_E_GET_VALUE(thr->heap, e, idx).v)); idx++; /* recheck that the property still exists */ if (check_existence && !duk_hobject_hasprop_raw(thr, enum_target, k)) { DUK_DDD(DUK_DDDPRINT("property deleted during enumeration, skip")); continue; } DUK_DDD(DUK_DDDPRINT("enumeration: found element, key: %!O", (duk_heaphdr *) k)); res = k; break; } DUK_DDD(DUK_DDDPRINT("enumeration: updating next index to %ld", (long) idx)); duk_push_u32(thr, (duk_uint32_t) idx); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_INT_NEXT); /* [... enum] */ if (res) { duk_push_hstring(thr, res); if (get_value) { duk_push_hobject(thr, enum_target); duk_dup_m2(thr); /* -> [... enum key enum_target key] */ duk_get_prop(thr, -2); /* -> [... enum key enum_target val] */ duk_remove_m2(thr); /* -> [... enum key val] */ duk_remove(thr, -3); /* -> [... key val] */ } else { duk_remove_m2(thr); /* -> [... key] */ } return 1; } else { duk_pop(thr); /* -> [...] */ return 0; } } /* * Get enumerated keys in an ECMAScript array. Matches Object.keys() behavior * described in E5 Section 15.2.3.14. */ DUK_INTERNAL duk_ret_t duk_hobject_get_enumerated_keys(duk_hthread *thr, duk_small_uint_t enum_flags) { duk_hobject *e; duk_hstring **keys; duk_tval *tv; duk_uint_fast32_t count; DUK_ASSERT(thr != NULL); DUK_ASSERT(duk_get_hobject(thr, -1) != NULL); /* Create a temporary enumerator to get the (non-duplicated) key list; * the enumerator state is initialized without being needed, but that * has little impact. */ duk_hobject_enumerator_create(thr, enum_flags); e = duk_known_hobject(thr, -1); /* [enum_target enum res] */ /* Create dense result array to exact size. */ DUK_ASSERT(DUK_HOBJECT_GET_ENEXT(e) >= DUK__ENUM_START_INDEX); count = (duk_uint32_t) (DUK_HOBJECT_GET_ENEXT(e) - DUK__ENUM_START_INDEX); /* XXX: uninit would be OK */ tv = duk_push_harray_with_size_outptr(thr, (duk_uint32_t) count); DUK_ASSERT(count == 0 || tv != NULL); DUK_ASSERT(!duk_is_bare_object(thr, -1)); /* Fill result array, no side effects. */ keys = DUK_HOBJECT_E_GET_KEY_BASE(thr->heap, e); keys += DUK__ENUM_START_INDEX; while (count-- > 0) { duk_hstring *k; k = *keys++; DUK_ASSERT(k != NULL); /* enumerator must have no keys deleted */ DUK_TVAL_SET_STRING(tv, k); tv++; DUK_HSTRING_INCREF(thr, k); } /* [enum_target enum res] */ duk_remove_m2(thr); /* [enum_target res] */ return 1; /* return 1 to allow callers to tail call */ } /* automatic undefs */ #undef DUK__ENUM_START_INDEX /* * Misc support functions */ /* #include duk_internal.h -> already included */ DUK_INTERNAL duk_bool_t duk_hobject_prototype_chain_contains(duk_hthread *thr, duk_hobject *h, duk_hobject *p, duk_bool_t ignore_loop) { duk_uint_t sanity; DUK_ASSERT(thr != NULL); /* False if the object is NULL or the prototype 'p' is NULL. * In particular, false if both are NULL (don't compare equal). */ if (h == NULL || p == NULL) { return 0; } sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY; do { if (h == p) { return 1; } if (sanity-- == 0) { if (ignore_loop) { break; } else { DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT); DUK_WO_NORETURN(return 0;); } } h = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h); } while (h); return 0; } DUK_INTERNAL void duk_hobject_set_prototype_updref(duk_hthread *thr, duk_hobject *h, duk_hobject *p) { #if defined(DUK_USE_REFERENCE_COUNTING) duk_hobject *tmp; DUK_ASSERT(h); tmp = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h); DUK_HOBJECT_SET_PROTOTYPE(thr->heap, h, p); DUK_HOBJECT_INCREF_ALLOWNULL(thr, p); /* avoid problems if p == h->prototype */ DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); #else DUK_ASSERT(h); DUK_UNREF(thr); DUK_HOBJECT_SET_PROTOTYPE(thr->heap, h, p); #endif } /* * Helpers for creating and querying pc2line debug data, which * converts a bytecode program counter to a source line number. * * The run-time pc2line data is bit-packed, and documented in: * * doc/function-objects.rst */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_PC2LINE) /* Generate pc2line data for an instruction sequence, leaving a buffer on stack top. */ DUK_INTERNAL void duk_hobject_pc2line_pack(duk_hthread *thr, duk_compiler_instr *instrs, duk_uint_fast32_t length) { duk_hbuffer_dynamic *h_buf; duk_bitencoder_ctx be_ctx_alloc; duk_bitencoder_ctx *be_ctx = &be_ctx_alloc; duk_uint32_t *hdr; duk_size_t new_size; duk_uint_fast32_t num_header_entries; duk_uint_fast32_t curr_offset; duk_int_fast32_t curr_line, next_line, diff_line; duk_uint_fast32_t curr_pc; duk_uint_fast32_t hdr_index; DUK_ASSERT(length <= DUK_COMPILER_MAX_BYTECODE_LENGTH); num_header_entries = (length + DUK_PC2LINE_SKIP - 1) / DUK_PC2LINE_SKIP; curr_offset = (duk_uint_fast32_t) (sizeof(duk_uint32_t) + num_header_entries * sizeof(duk_uint32_t) * 2); duk_push_dynamic_buffer(thr, (duk_size_t) curr_offset); h_buf = (duk_hbuffer_dynamic *) duk_known_hbuffer(thr, -1); DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(h_buf) && !DUK_HBUFFER_HAS_EXTERNAL(h_buf)); hdr = (duk_uint32_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, h_buf); DUK_ASSERT(hdr != NULL); hdr[0] = (duk_uint32_t) length; /* valid pc range is [0, length[ */ curr_pc = 0U; while (curr_pc < length) { new_size = (duk_size_t) (curr_offset + DUK_PC2LINE_MAX_DIFF_LENGTH); duk_hbuffer_resize(thr, h_buf, new_size); hdr = (duk_uint32_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, h_buf); DUK_ASSERT(hdr != NULL); DUK_ASSERT(curr_pc < length); hdr_index = 1 + (curr_pc / DUK_PC2LINE_SKIP) * 2; curr_line = (duk_int_fast32_t) instrs[curr_pc].line; hdr[hdr_index + 0] = (duk_uint32_t) curr_line; hdr[hdr_index + 1] = (duk_uint32_t) curr_offset; #if 0 DUK_DDD(DUK_DDDPRINT("hdr[%ld]: pc=%ld line=%ld offset=%ld", (long) (curr_pc / DUK_PC2LINE_SKIP), (long) curr_pc, (long) hdr[hdr_index + 0], (long) hdr[hdr_index + 1])); #endif duk_memzero(be_ctx, sizeof(*be_ctx)); be_ctx->data = ((duk_uint8_t *) hdr) + curr_offset; be_ctx->length = (duk_size_t) DUK_PC2LINE_MAX_DIFF_LENGTH; for (;;) { curr_pc++; if ( ((curr_pc % DUK_PC2LINE_SKIP) == 0) || /* end of diff run */ (curr_pc >= length) ) { /* end of bytecode */ break; } DUK_ASSERT(curr_pc < length); next_line = (duk_int32_t) instrs[curr_pc].line; diff_line = next_line - curr_line; #if 0 DUK_DDD(DUK_DDDPRINT("curr_line=%ld, next_line=%ld -> diff_line=%ld", (long) curr_line, (long) next_line, (long) diff_line)); #endif if (diff_line == 0) { /* 0 */ duk_be_encode(be_ctx, 0, 1); } else if (diff_line >= 1 && diff_line <= 4) { /* 1 0 <2 bits> */ duk_be_encode(be_ctx, (duk_uint32_t) ((0x02 << 2) + (diff_line - 1)), 4); } else if (diff_line >= -0x80 && diff_line <= 0x7f) { /* 1 1 0 <8 bits> */ DUK_ASSERT(diff_line + 0x80 >= 0 && diff_line + 0x80 <= 0xff); duk_be_encode(be_ctx, (duk_uint32_t) ((0x06 << 8) + (diff_line + 0x80)), 11); } else { /* 1 1 1 <32 bits> * Encode in two parts to avoid bitencode 24-bit limitation */ duk_be_encode(be_ctx, (duk_uint32_t) ((0x07 << 16) + ((next_line >> 16) & 0xffff)), 19); duk_be_encode(be_ctx, (duk_uint32_t) (next_line & 0xffff), 16); } curr_line = next_line; } duk_be_finish(be_ctx); DUK_ASSERT(!be_ctx->truncated); /* be_ctx->offset == length of encoded bitstream */ curr_offset += (duk_uint_fast32_t) be_ctx->offset; } /* compact */ new_size = (duk_size_t) curr_offset; duk_hbuffer_resize(thr, h_buf, new_size); (void) duk_to_fixed_buffer(thr, -1, NULL); DUK_DDD(DUK_DDDPRINT("final pc2line data: pc_limit=%ld, length=%ld, %lf bits/opcode --> %!ixT", (long) length, (long) new_size, (double) new_size * 8.0 / (double) length, (duk_tval *) duk_get_tval(thr, -1))); } /* PC is unsigned. If caller does PC arithmetic and gets a negative result, * it will map to a large PC which is out of bounds and causes a zero to be * returned. */ DUK_LOCAL duk_uint_fast32_t duk__hobject_pc2line_query_raw(duk_hthread *thr, duk_hbuffer_fixed *buf, duk_uint_fast32_t pc) { duk_bitdecoder_ctx bd_ctx_alloc; duk_bitdecoder_ctx *bd_ctx = &bd_ctx_alloc; duk_uint32_t *hdr; duk_uint_fast32_t start_offset; duk_uint_fast32_t pc_limit; duk_uint_fast32_t hdr_index; duk_uint_fast32_t pc_base; duk_uint_fast32_t n; duk_uint_fast32_t curr_line; DUK_ASSERT(buf != NULL); DUK_ASSERT(!DUK_HBUFFER_HAS_DYNAMIC((duk_hbuffer *) buf) && !DUK_HBUFFER_HAS_EXTERNAL((duk_hbuffer *) buf)); DUK_UNREF(thr); /* * Use the index in the header to find the right starting point */ hdr_index = pc / DUK_PC2LINE_SKIP; pc_base = hdr_index * DUK_PC2LINE_SKIP; n = pc - pc_base; if (DUK_HBUFFER_FIXED_GET_SIZE(buf) <= sizeof(duk_uint32_t)) { DUK_DD(DUK_DDPRINT("pc2line lookup failed: buffer is smaller than minimal header")); goto pc2line_error; } hdr = (duk_uint32_t *) (void *) DUK_HBUFFER_FIXED_GET_DATA_PTR(thr->heap, buf); pc_limit = hdr[0]; if (pc >= pc_limit) { /* Note: pc is unsigned and cannot be negative */ DUK_DD(DUK_DDPRINT("pc2line lookup failed: pc out of bounds (pc=%ld, limit=%ld)", (long) pc, (long) pc_limit)); goto pc2line_error; } curr_line = hdr[1 + hdr_index * 2]; start_offset = hdr[1 + hdr_index * 2 + 1]; if ((duk_size_t) start_offset > DUK_HBUFFER_FIXED_GET_SIZE(buf)) { DUK_DD(DUK_DDPRINT("pc2line lookup failed: start_offset out of bounds (start_offset=%ld, buffer_size=%ld)", (long) start_offset, (long) DUK_HBUFFER_GET_SIZE((duk_hbuffer *) buf))); goto pc2line_error; } /* * Iterate the bitstream (line diffs) until PC is reached */ duk_memzero(bd_ctx, sizeof(*bd_ctx)); bd_ctx->data = ((duk_uint8_t *) hdr) + start_offset; bd_ctx->length = (duk_size_t) (DUK_HBUFFER_FIXED_GET_SIZE(buf) - start_offset); #if 0 DUK_DDD(DUK_DDDPRINT("pc2line lookup: pc=%ld -> hdr_index=%ld, pc_base=%ld, n=%ld, start_offset=%ld", (long) pc, (long) hdr_index, (long) pc_base, (long) n, (long) start_offset)); #endif while (n > 0) { #if 0 DUK_DDD(DUK_DDDPRINT("lookup: n=%ld, curr_line=%ld", (long) n, (long) curr_line)); #endif if (duk_bd_decode_flag(bd_ctx)) { if (duk_bd_decode_flag(bd_ctx)) { if (duk_bd_decode_flag(bd_ctx)) { /* 1 1 1 <32 bits> */ duk_uint_fast32_t t; t = duk_bd_decode(bd_ctx, 16); /* workaround: max nbits = 24 now */ t = (t << 16) + duk_bd_decode(bd_ctx, 16); curr_line = t; } else { /* 1 1 0 <8 bits> */ duk_uint_fast32_t t; t = duk_bd_decode(bd_ctx, 8); curr_line = curr_line + t - 0x80; } } else { /* 1 0 <2 bits> */ duk_uint_fast32_t t; t = duk_bd_decode(bd_ctx, 2); curr_line = curr_line + t + 1; } } else { /* 0: no change */ } n--; } DUK_DDD(DUK_DDDPRINT("pc2line lookup result: pc %ld -> line %ld", (long) pc, (long) curr_line)); return curr_line; pc2line_error: DUK_D(DUK_DPRINT("pc2line conversion failed for pc=%ld", (long) pc)); return 0; } DUK_INTERNAL duk_uint_fast32_t duk_hobject_pc2line_query(duk_hthread *thr, duk_idx_t idx_func, duk_uint_fast32_t pc) { duk_hbuffer_fixed *pc2line; duk_uint_fast32_t line; /* XXX: now that pc2line is used by the debugger quite heavily in * checked execution, this should be optimized to avoid value stack * and perhaps also implement some form of pc2line caching (see * future work in debugger.rst). */ duk_xget_owndataprop_stridx_short(thr, idx_func, DUK_STRIDX_INT_PC2LINE); pc2line = (duk_hbuffer_fixed *) (void *) duk_get_hbuffer(thr, -1); if (pc2line != NULL) { DUK_ASSERT(!DUK_HBUFFER_HAS_DYNAMIC((duk_hbuffer *) pc2line) && !DUK_HBUFFER_HAS_EXTERNAL((duk_hbuffer *) pc2line)); line = duk__hobject_pc2line_query_raw(thr, pc2line, (duk_uint_fast32_t) pc); } else { line = 0; } duk_pop(thr); return line; } #endif /* DUK_USE_PC2LINE */ /* * duk_hobject property access functionality. * * This is very central functionality for size, performance, and compliance. * It is also rather intricate; see hobject-algorithms.rst for discussion on * the algorithms and memory-management.rst for discussion on refcounts and * side effect issues. * * Notes: * * - It might be tempting to assert "refcount nonzero" for objects * being operated on, but that's not always correct: objects with * a zero refcount may be operated on by the refcount implementation * (finalization) for instance. Hence, no refcount assertions are made. * * - Many operations (memory allocation, identifier operations, etc) * may cause arbitrary side effects (e.g. through GC and finalization). * These side effects may invalidate duk_tval pointers which point to * areas subject to reallocation (like value stack). Heap objects * themselves have stable pointers. Holding heap object pointers or * duk_tval copies is not problematic with respect to side effects; * care must be taken when holding and using argument duk_tval pointers. * * - If a finalizer is executed, it may operate on the the same object * we're currently dealing with. For instance, the finalizer might * delete a certain property which has already been looked up and * confirmed to exist. Ideally finalizers would be disabled if GC * happens during property access. At the moment property table realloc * disables finalizers, and all DECREFs may cause arbitrary changes so * handle DECREF carefully. * * - The order of operations for a DECREF matters. When DECREF is executed, * the entire object graph must be consistent; note that a refzero may * lead to a mark-and-sweep through a refcount finalizer. Use NORZ macros * and an explicit DUK_REFZERO_CHECK_xxx() if achieving correct order is hard. */ /* * XXX: array indices are mostly typed as duk_uint32_t here; duk_uarridx_t * might be more appropriate. */ /* #include duk_internal.h -> already included */ /* * Local defines */ #define DUK__NO_ARRAY_INDEX DUK_HSTRING_NO_ARRAY_INDEX /* Marker values for hash part. */ #define DUK__HASH_UNUSED DUK_HOBJECT_HASHIDX_UNUSED #define DUK__HASH_DELETED DUK_HOBJECT_HASHIDX_DELETED /* Valstack space that suffices for all local calls, excluding any recursion * into ECMAScript or Duktape/C calls (Proxy, getters, etc). */ #define DUK__VALSTACK_SPACE 10 /* Valstack space allocated especially for proxy lookup which does a * recursive property lookup. */ #define DUK__VALSTACK_PROXY_LOOKUP 20 /* * Local prototypes */ DUK_LOCAL_DECL duk_bool_t duk__check_arguments_map_for_get(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc); DUK_LOCAL_DECL void duk__check_arguments_map_for_put(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc, duk_bool_t throw_flag); DUK_LOCAL_DECL void duk__check_arguments_map_for_delete(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc); DUK_LOCAL_DECL duk_bool_t duk__handle_put_array_length_smaller(duk_hthread *thr, duk_hobject *obj, duk_uint32_t old_len, duk_uint32_t new_len, duk_bool_t force_flag, duk_uint32_t *out_result_len); DUK_LOCAL_DECL duk_bool_t duk__handle_put_array_length(duk_hthread *thr, duk_hobject *obj); DUK_LOCAL_DECL duk_bool_t duk__get_propdesc(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *out_desc, duk_small_uint_t flags); DUK_LOCAL_DECL duk_bool_t duk__get_own_propdesc_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_uint32_t arr_idx, duk_propdesc *out_desc, duk_small_uint_t flags); DUK_LOCAL_DECL void duk__abandon_array_part(duk_hthread *thr, duk_hobject *obj); DUK_LOCAL_DECL void duk__grow_props_for_array_item(duk_hthread *thr, duk_hobject *obj, duk_uint32_t highest_arr_idx); /* * Misc helpers */ /* Convert a duk_tval number (caller checks) to a 32-bit index. Returns * DUK__NO_ARRAY_INDEX if the number is not whole or not a valid array * index. */ /* XXX: for fastints, could use a variant which assumes a double duk_tval * (and doesn't need to check for fastint again). */ DUK_LOCAL duk_uint32_t duk__tval_number_to_arr_idx(duk_tval *tv) { duk_double_t dbl; duk_uint32_t idx; DUK_ASSERT(tv != NULL); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); /* -0 is accepted here as index 0 because ToString(-0) == "0" which is * in canonical form and thus an array index. */ dbl = DUK_TVAL_GET_NUMBER(tv); idx = (duk_uint32_t) dbl; if ((duk_double_t) idx == dbl) { /* Is whole and within 32 bit range. If the value happens to be 0xFFFFFFFF, * it's not a valid array index but will then match DUK__NO_ARRAY_INDEX. */ return idx; } return DUK__NO_ARRAY_INDEX; } #if defined(DUK_USE_FASTINT) /* Convert a duk_tval fastint (caller checks) to a 32-bit index. */ DUK_LOCAL duk_uint32_t duk__tval_fastint_to_arr_idx(duk_tval *tv) { duk_int64_t t; DUK_ASSERT(tv != NULL); DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv)); t = DUK_TVAL_GET_FASTINT(tv); if (((duk_uint64_t) t & ~DUK_U64_CONSTANT(0xffffffff)) != 0) { /* Catches >0x100000000 and negative values. */ return DUK__NO_ARRAY_INDEX; } /* If the value happens to be 0xFFFFFFFF, it's not a valid array index * but will then match DUK__NO_ARRAY_INDEX. */ return (duk_uint32_t) t; } #endif /* DUK_USE_FASTINT */ /* Convert a duk_tval on the value stack (in a trusted index we don't validate) * to a string or symbol using ES2015 ToPropertyKey(): * http://www.ecma-international.org/ecma-262/6.0/#sec-topropertykey. * * Also check if it's a valid array index and return that (or DUK__NO_ARRAY_INDEX * if not). */ DUK_LOCAL duk_uint32_t duk__to_property_key(duk_hthread *thr, duk_idx_t idx, duk_hstring **out_h) { duk_uint32_t arr_idx; duk_hstring *h; duk_tval *tv_dst; DUK_ASSERT(thr != NULL); DUK_ASSERT(out_h != NULL); DUK_ASSERT(duk_is_valid_index(thr, idx)); DUK_ASSERT(idx < 0); /* XXX: The revised ES2015 ToPropertyKey() handling (ES5.1 was just * ToString()) involves a ToPrimitive(), a symbol check, and finally * a ToString(). Figure out the best way to have a good fast path * but still be compliant and share code. */ tv_dst = DUK_GET_TVAL_NEGIDX(thr, idx); /* intentionally unvalidated */ if (DUK_TVAL_IS_STRING(tv_dst)) { /* Most important path: strings and plain symbols are used as * is. For symbols the array index check below is unnecessary * (they're never valid array indices) but checking that the * string is a symbol would make the plain string path slower * unnecessarily. */ h = DUK_TVAL_GET_STRING(tv_dst); } else { h = duk_to_property_key_hstring(thr, idx); } DUK_ASSERT(h != NULL); *out_h = h; arr_idx = DUK_HSTRING_GET_ARRIDX_FAST(h); return arr_idx; } DUK_LOCAL duk_uint32_t duk__push_tval_to_property_key(duk_hthread *thr, duk_tval *tv_key, duk_hstring **out_h) { duk_push_tval(thr, tv_key); /* XXX: could use an unsafe push here */ return duk__to_property_key(thr, -1, out_h); } /* String is an own (virtual) property of a plain buffer. */ DUK_LOCAL duk_bool_t duk__key_is_plain_buf_ownprop(duk_hthread *thr, duk_hbuffer *buf, duk_hstring *key, duk_uint32_t arr_idx) { DUK_UNREF(thr); /* Virtual index properties. Checking explicitly for * 'arr_idx != DUK__NO_ARRAY_INDEX' is not necessary * because DUK__NO_ARRAY_INDEXi is always larger than * maximum allowed buffer size. */ DUK_ASSERT(DUK__NO_ARRAY_INDEX >= DUK_HBUFFER_GET_SIZE(buf)); if (arr_idx < DUK_HBUFFER_GET_SIZE(buf)) { return 1; } /* Other virtual properties. */ return (key == DUK_HTHREAD_STRING_LENGTH(thr)); } /* * Helpers for managing property storage size */ /* Get default hash part size for a certain entry part size. */ #if defined(DUK_USE_HOBJECT_HASH_PART) DUK_LOCAL duk_uint32_t duk__get_default_h_size(duk_uint32_t e_size) { DUK_ASSERT(e_size <= DUK_HOBJECT_MAX_PROPERTIES); if (e_size >= DUK_USE_HOBJECT_HASH_PROP_LIMIT) { duk_uint32_t res; duk_uint32_t tmp; /* Hash size should be 2^N where N is chosen so that 2^N is * larger than e_size. Extra shifting is used to ensure hash * is relatively sparse. */ tmp = e_size; res = 2; /* Result will be 2 ** (N + 1). */ while (tmp >= 0x40) { tmp >>= 6; res <<= 6; } while (tmp != 0) { tmp >>= 1; res <<= 1; } DUK_ASSERT((DUK_HOBJECT_MAX_PROPERTIES << 2U) > DUK_HOBJECT_MAX_PROPERTIES); /* Won't wrap, even shifted by 2. */ DUK_ASSERT(res > e_size); return res; } else { return 0; } } #endif /* USE_PROP_HASH_PART */ /* Get minimum entry part growth for a certain size. */ DUK_LOCAL duk_uint32_t duk__get_min_grow_e(duk_uint32_t e_size) { duk_uint32_t res; res = (e_size + DUK_USE_HOBJECT_ENTRY_MINGROW_ADD) / DUK_USE_HOBJECT_ENTRY_MINGROW_DIVISOR; DUK_ASSERT(res >= 1); /* important for callers */ return res; } /* Get minimum array part growth for a certain size. */ DUK_LOCAL duk_uint32_t duk__get_min_grow_a(duk_uint32_t a_size) { duk_uint32_t res; res = (a_size + DUK_USE_HOBJECT_ARRAY_MINGROW_ADD) / DUK_USE_HOBJECT_ARRAY_MINGROW_DIVISOR; DUK_ASSERT(res >= 1); /* important for callers */ return res; } /* Count actually used entry part entries (non-NULL keys). */ DUK_LOCAL duk_uint32_t duk__count_used_e_keys(duk_hthread *thr, duk_hobject *obj) { duk_uint_fast32_t i; duk_uint_fast32_t n = 0; duk_hstring **e; DUK_ASSERT(obj != NULL); DUK_UNREF(thr); e = DUK_HOBJECT_E_GET_KEY_BASE(thr->heap, obj); for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) { if (*e++) { n++; } } return (duk_uint32_t) n; } /* Count actually used array part entries and array minimum size. * NOTE: 'out_min_size' can be computed much faster by starting from the * end and breaking out early when finding first used entry, but this is * not needed now. */ DUK_LOCAL void duk__compute_a_stats(duk_hthread *thr, duk_hobject *obj, duk_uint32_t *out_used, duk_uint32_t *out_min_size) { duk_uint_fast32_t i; duk_uint_fast32_t used = 0; duk_uint_fast32_t highest_idx = (duk_uint_fast32_t) -1; /* see below */ duk_tval *a; DUK_ASSERT(obj != NULL); DUK_ASSERT(out_used != NULL); DUK_ASSERT(out_min_size != NULL); DUK_UNREF(thr); a = DUK_HOBJECT_A_GET_BASE(thr->heap, obj); for (i = 0; i < DUK_HOBJECT_GET_ASIZE(obj); i++) { duk_tval *tv = a++; if (!DUK_TVAL_IS_UNUSED(tv)) { used++; highest_idx = i; } } /* Initial value for highest_idx is -1 coerced to unsigned. This * is a bit odd, but (highest_idx + 1) will then wrap to 0 below * for out_min_size as intended. */ *out_used = (duk_uint32_t) used; *out_min_size = (duk_uint32_t) (highest_idx + 1); /* 0 if no used entries */ } /* Check array density and indicate whether or not the array part should be abandoned. */ DUK_LOCAL duk_bool_t duk__abandon_array_density_check(duk_uint32_t a_used, duk_uint32_t a_size) { /* * Array abandon check; abandon if: * * new_used / new_size < limit * new_used < limit * new_size || limit is 3 bits fixed point * new_used < limit' / 8 * new_size || *8 * 8*new_used < limit' * new_size || :8 * new_used < limit' * (new_size / 8) * * Here, new_used = a_used, new_size = a_size. * * Note: some callers use approximate values for a_used and/or a_size * (e.g. dropping a '+1' term). This doesn't affect the usefulness * of the check, but may confuse debugging. */ return (a_used < DUK_USE_HOBJECT_ARRAY_ABANDON_LIMIT * (a_size >> 3)); } /* Fast check for extending array: check whether or not a slow density check is required. */ DUK_LOCAL duk_bool_t duk__abandon_array_slow_check_required(duk_uint32_t arr_idx, duk_uint32_t old_size) { /* * In a fast check we assume old_size equals old_used (i.e., existing * array is fully dense). * * Slow check if: * * (new_size - old_size) / old_size > limit * new_size - old_size > limit * old_size * new_size > (1 + limit) * old_size || limit' is 3 bits fixed point * new_size > (1 + (limit' / 8)) * old_size || * 8 * 8 * new_size > (8 + limit') * old_size || : 8 * new_size > (8 + limit') * (old_size / 8) * new_size > limit'' * (old_size / 8) || limit'' = 9 -> max 25% increase * arr_idx + 1 > limit'' * (old_size / 8) * * This check doesn't work well for small values, so old_size is rounded * up for the check (and the '+ 1' of arr_idx can be ignored in practice): * * arr_idx > limit'' * ((old_size + 7) / 8) */ return (arr_idx > DUK_USE_HOBJECT_ARRAY_FAST_RESIZE_LIMIT * ((old_size + 7) >> 3)); } DUK_LOCAL duk_bool_t duk__abandon_array_check(duk_hthread *thr, duk_uint32_t arr_idx, duk_hobject *obj) { duk_uint32_t min_size; duk_uint32_t old_used; duk_uint32_t old_size; if (!duk__abandon_array_slow_check_required(arr_idx, DUK_HOBJECT_GET_ASIZE(obj))) { DUK_DDD(DUK_DDDPRINT("=> fast resize is OK")); return 0; } duk__compute_a_stats(thr, obj, &old_used, &old_size); DUK_DDD(DUK_DDDPRINT("abandon check, array stats: old_used=%ld, old_size=%ld, arr_idx=%ld", (long) old_used, (long) old_size, (long) arr_idx)); min_size = arr_idx + 1; #if defined(DUK_USE_OBJSIZES16) if (min_size > DUK_UINT16_MAX) { goto do_abandon; } #endif DUK_UNREF(min_size); /* Note: intentionally use approximations to shave a few instructions: * a_used = old_used (accurate: old_used + 1) * a_size = arr_idx (accurate: arr_idx + 1) */ if (duk__abandon_array_density_check(old_used, arr_idx)) { DUK_DD(DUK_DDPRINT("write to new array entry beyond current length, " "decided to abandon array part (would become too sparse)")); /* Abandoning requires a props allocation resize and * 'rechecks' the valstack, invalidating any existing * valstack value pointers. */ goto do_abandon; } DUK_DDD(DUK_DDDPRINT("=> decided to keep array part")); return 0; do_abandon: duk__abandon_array_part(thr, obj); DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(obj)); return 1; } DUK_LOCAL duk_tval *duk__obtain_arridx_slot_slowpath(duk_hthread *thr, duk_uint32_t arr_idx, duk_hobject *obj) { /* * Array needs to grow, but we don't want it becoming too sparse. * If it were to become sparse, abandon array part, moving all * array entries into the entries part (for good). * * Since we don't keep track of actual density (used vs. size) of * the array part, we need to estimate somehow. The check is made * in two parts: * * - Check whether the resize need is small compared to the * current size (relatively); if so, resize without further * checking (essentially we assume that the original part is * "dense" so that the result would be dense enough). * * - Otherwise, compute the resize using an actual density * measurement based on counting the used array entries. */ DUK_DDD(DUK_DDDPRINT("write to new array requires array resize, decide whether to do a " "fast resize without abandon check (arr_idx=%ld, old_size=%ld)", (long) arr_idx, (long) DUK_HOBJECT_GET_ASIZE(obj))); if (DUK_UNLIKELY(duk__abandon_array_check(thr, arr_idx, obj) != 0)) { DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(obj)); return NULL; } DUK_DD(DUK_DDPRINT("write to new array entry beyond current length, " "decided to extend current allocation")); /* In principle it's possible to run out of memory extending the * array but with the allocation going through if we were to abandon * the array part and try again. In practice this should be rare * because abandoned arrays have a higher per-entry footprint. */ duk__grow_props_for_array_item(thr, obj, arr_idx); DUK_ASSERT(DUK_HOBJECT_HAS_ARRAY_PART(obj)); DUK_ASSERT(arr_idx < DUK_HOBJECT_GET_ASIZE(obj)); return DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, arr_idx); } DUK_LOCAL DUK_INLINE duk_tval *duk__obtain_arridx_slot(duk_hthread *thr, duk_uint32_t arr_idx, duk_hobject *obj) { if (DUK_LIKELY(arr_idx < DUK_HOBJECT_GET_ASIZE(obj))) { return DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, arr_idx); } else { return duk__obtain_arridx_slot_slowpath(thr, arr_idx, obj); } } /* * Proxy helpers */ #if defined(DUK_USE_ES6_PROXY) DUK_INTERNAL duk_bool_t duk_hobject_proxy_check(duk_hobject *obj, duk_hobject **out_target, duk_hobject **out_handler) { duk_hproxy *h_proxy; DUK_ASSERT(obj != NULL); DUK_ASSERT(out_target != NULL); DUK_ASSERT(out_handler != NULL); /* Caller doesn't need to check exotic proxy behavior (but does so for * some fast paths). */ if (DUK_LIKELY(!DUK_HOBJECT_IS_PROXY(obj))) { return 0; } h_proxy = (duk_hproxy *) obj; DUK_HPROXY_ASSERT_VALID(h_proxy); DUK_ASSERT(h_proxy->handler != NULL); DUK_ASSERT(h_proxy->target != NULL); *out_handler = h_proxy->handler; *out_target = h_proxy->target; return 1; } #endif /* DUK_USE_ES6_PROXY */ /* Get Proxy target object. If the argument is not a Proxy, return it as is. * If a Proxy is revoked, an error is thrown. */ #if defined(DUK_USE_ES6_PROXY) DUK_INTERNAL duk_hobject *duk_hobject_resolve_proxy_target(duk_hobject *obj) { DUK_ASSERT(obj != NULL); /* Resolve Proxy targets until Proxy chain ends. No explicit check for * a Proxy loop: user code cannot create such a loop (it would only be * possible by editing duk_hproxy references directly). */ while (DUK_HOBJECT_IS_PROXY(obj)) { duk_hproxy *h_proxy; h_proxy = (duk_hproxy *) obj; DUK_HPROXY_ASSERT_VALID(h_proxy); obj = h_proxy->target; DUK_ASSERT(obj != NULL); } DUK_ASSERT(obj != NULL); return obj; } #endif /* DUK_USE_ES6_PROXY */ #if defined(DUK_USE_ES6_PROXY) DUK_LOCAL duk_bool_t duk__proxy_check_prop(duk_hthread *thr, duk_hobject *obj, duk_small_uint_t stridx_trap, duk_tval *tv_key, duk_hobject **out_target) { duk_hobject *h_handler; DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(tv_key != NULL); DUK_ASSERT(out_target != NULL); if (!duk_hobject_proxy_check(obj, out_target, &h_handler)) { return 0; } DUK_ASSERT(*out_target != NULL); DUK_ASSERT(h_handler != NULL); /* XXX: At the moment Duktape accesses internal keys like _Finalizer using a * normal property set/get which would allow a proxy handler to interfere with * such behavior and to get access to internal key strings. This is not a problem * as such because internal key strings can be created in other ways too (e.g. * through buffers). The best fix is to change Duktape internal lookups to * skip proxy behavior. Until that, internal property accesses bypass the * proxy and are applied to the target (as if the handler did not exist). * This has some side effects, see test-bi-proxy-internal-keys.js. */ if (DUK_TVAL_IS_STRING(tv_key)) { duk_hstring *h_key = (duk_hstring *) DUK_TVAL_GET_STRING(tv_key); DUK_ASSERT(h_key != NULL); if (DUK_HSTRING_HAS_HIDDEN(h_key)) { /* Symbol accesses must go through proxy lookup in ES2015. * Hidden symbols behave like Duktape 1.x internal keys * and currently won't. */ DUK_DDD(DUK_DDDPRINT("hidden key, skip proxy handler and apply to target")); return 0; } } /* The handler is looked up with a normal property lookup; it may be an * accessor or the handler object itself may be a proxy object. If the * handler is a proxy, we need to extend the valstack as we make a * recursive proxy check without a function call in between (in fact * there is no limit to the potential recursion here). * * (For sanity, proxy creation rejects another proxy object as either * the handler or the target at the moment so recursive proxy cases * are not realized now.) */ /* XXX: C recursion limit if proxies are allowed as handler/target values */ duk_require_stack(thr, DUK__VALSTACK_PROXY_LOOKUP); duk_push_hobject(thr, h_handler); if (duk_get_prop_stridx_short(thr, -1, stridx_trap)) { /* -> [ ... handler trap ] */ duk_insert(thr, -2); /* -> [ ... trap handler ] */ /* stack prepped for func call: [ ... trap handler ] */ return 1; } else { duk_pop_2_unsafe(thr); return 0; } } #endif /* DUK_USE_ES6_PROXY */ /* * Reallocate property allocation, moving properties to the new allocation. * * Includes key compaction, rehashing, and can also optionally abandon * the array part, 'migrating' array entries into the beginning of the * new entry part. * * There is no support for in-place reallocation or just compacting keys * without resizing the property allocation. This is intentional to keep * code size minimal, but would be useful future work. * * The implementation is relatively straightforward, except for the array * abandonment process. Array abandonment requires that new string keys * are interned, which may trigger GC. All keys interned so far must be * reachable for GC at all times and correctly refcounted for; valstack is * used for that now. * * Also, a GC triggered during this reallocation process must not interfere * with the object being resized. This is currently controlled by preventing * finalizers (as they may affect ANY object) and object compaction in * mark-and-sweep. It would suffice to protect only this particular object * from compaction, however. DECREF refzero cascades are side effect free * and OK. * * Note: because we need to potentially resize the valstack (as part * of abandoning the array part), any tval pointers to the valstack * will become invalid after this call. */ DUK_INTERNAL void duk_hobject_realloc_props(duk_hthread *thr, duk_hobject *obj, duk_uint32_t new_e_size, duk_uint32_t new_a_size, duk_uint32_t new_h_size, duk_bool_t abandon_array) { duk_small_uint_t prev_ms_base_flags; duk_uint32_t new_alloc_size; duk_uint32_t new_e_size_adjusted; duk_uint8_t *new_p; duk_hstring **new_e_k; duk_propvalue *new_e_pv; duk_uint8_t *new_e_f; duk_tval *new_a; duk_uint32_t *new_h; duk_uint32_t new_e_next; duk_uint_fast32_t i; duk_size_t array_copy_size; #if defined(DUK_USE_ASSERTIONS) duk_bool_t prev_error_not_allowed; #endif DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(!abandon_array || new_a_size == 0); /* if abandon_array, new_a_size must be 0 */ DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL || (DUK_HOBJECT_GET_ESIZE(obj) == 0 && DUK_HOBJECT_GET_ASIZE(obj) == 0)); DUK_ASSERT(new_h_size == 0 || new_h_size >= new_e_size); /* required to guarantee success of rehashing, * intentionally use unadjusted new_e_size */ DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_STATS_INC(thr->heap, stats_object_realloc_props); /* * Pre resize assertions. */ #if defined(DUK_USE_ASSERTIONS) /* XXX: pre-checks (such as no duplicate keys) */ #endif /* * For property layout 1, tweak e_size to ensure that the whole entry * part (key + val + flags) is a suitable multiple for alignment * (platform specific). * * Property layout 2 does not require this tweaking and is preferred * on low RAM platforms requiring alignment. */ #if defined(DUK_USE_HOBJECT_LAYOUT_2) || defined(DUK_USE_HOBJECT_LAYOUT_3) DUK_DDD(DUK_DDDPRINT("using layout 2 or 3, no need to pad e_size: %ld", (long) new_e_size)); new_e_size_adjusted = new_e_size; #elif defined(DUK_USE_HOBJECT_LAYOUT_1) && (DUK_HOBJECT_ALIGN_TARGET == 1) DUK_DDD(DUK_DDDPRINT("using layout 1, but no need to pad e_size: %ld", (long) new_e_size)); new_e_size_adjusted = new_e_size; #elif defined(DUK_USE_HOBJECT_LAYOUT_1) && ((DUK_HOBJECT_ALIGN_TARGET == 4) || (DUK_HOBJECT_ALIGN_TARGET == 8)) new_e_size_adjusted = (new_e_size + (duk_uint32_t) DUK_HOBJECT_ALIGN_TARGET - 1U) & (~((duk_uint32_t) DUK_HOBJECT_ALIGN_TARGET - 1U)); DUK_DDD(DUK_DDDPRINT("using layout 1, and alignment target is %ld, adjusted e_size: %ld -> %ld", (long) DUK_HOBJECT_ALIGN_TARGET, (long) new_e_size, (long) new_e_size_adjusted)); DUK_ASSERT(new_e_size_adjusted >= new_e_size); #else #error invalid hobject layout defines #endif /* * Debug logging after adjustment. */ DUK_DDD(DUK_DDDPRINT("attempt to resize hobject %p props (%ld -> %ld bytes), from {p=%p,e_size=%ld,e_next=%ld,a_size=%ld,h_size=%ld} to " "{e_size=%ld,a_size=%ld,h_size=%ld}, abandon_array=%ld, unadjusted new_e_size=%ld", (void *) obj, (long) DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE(obj), DUK_HOBJECT_GET_ASIZE(obj), DUK_HOBJECT_GET_HSIZE(obj)), (long) DUK_HOBJECT_P_COMPUTE_SIZE(new_e_size_adjusted, new_a_size, new_h_size), (void *) DUK_HOBJECT_GET_PROPS(thr->heap, obj), (long) DUK_HOBJECT_GET_ESIZE(obj), (long) DUK_HOBJECT_GET_ENEXT(obj), (long) DUK_HOBJECT_GET_ASIZE(obj), (long) DUK_HOBJECT_GET_HSIZE(obj), (long) new_e_size_adjusted, (long) new_a_size, (long) new_h_size, (long) abandon_array, (long) new_e_size)); /* * Property count check. This is the only point where we ensure that * we don't get more (allocated) property space that we can handle. * There aren't hard limits as such, but some algorithms may fail * if we get too close to the 4G property limit. * * Since this works based on allocation size (not actually used size), * the limit is a bit approximate but good enough in practice. */ if (new_e_size_adjusted + new_a_size > DUK_HOBJECT_MAX_PROPERTIES) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return;); } #if defined(DUK_USE_OBJSIZES16) if (new_e_size_adjusted > DUK_UINT16_MAX || new_a_size > DUK_UINT16_MAX) { /* If caller gave us sizes larger than what we can store, * fail memory safely with an internal error rather than * truncating the sizes. */ DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return;); } #endif /* * Compute new alloc size and alloc new area. * * The new area is not tracked in the heap at all, so it's critical * we get to free/keep it in a controlled manner. */ #if defined(DUK_USE_ASSERTIONS) /* Whole path must be error throw free, but we may be called from * within error handling so can't assert for error_not_allowed == 0. */ prev_error_not_allowed = thr->heap->error_not_allowed; thr->heap->error_not_allowed = 1; #endif prev_ms_base_flags = thr->heap->ms_base_flags; thr->heap->ms_base_flags |= DUK_MS_FLAG_NO_OBJECT_COMPACTION; /* Avoid attempt to compact the current object (all objects really). */ thr->heap->pf_prevent_count++; /* Avoid finalizers. */ DUK_ASSERT(thr->heap->pf_prevent_count != 0); /* Wrap. */ new_alloc_size = DUK_HOBJECT_P_COMPUTE_SIZE(new_e_size_adjusted, new_a_size, new_h_size); DUK_DDD(DUK_DDDPRINT("new hobject allocation size is %ld", (long) new_alloc_size)); if (new_alloc_size == 0) { DUK_ASSERT(new_e_size_adjusted == 0); DUK_ASSERT(new_a_size == 0); DUK_ASSERT(new_h_size == 0); new_p = NULL; } else { /* Alloc may trigger mark-and-sweep but no compaction, and * cannot throw. */ #if 0 /* XXX: inject test */ if (1) { new_p = NULL; goto alloc_failed; } #endif new_p = (duk_uint8_t *) DUK_ALLOC(thr->heap, new_alloc_size); if (new_p == NULL) { /* NULL always indicates alloc failure because * new_alloc_size > 0. */ goto alloc_failed; } } /* Set up pointers to the new property area: this is hidden behind a macro * because it is memory layout specific. */ DUK_HOBJECT_P_SET_REALLOC_PTRS(new_p, new_e_k, new_e_pv, new_e_f, new_a, new_h, new_e_size_adjusted, new_a_size, new_h_size); DUK_UNREF(new_h); /* happens when hash part dropped */ new_e_next = 0; /* if new_p == NULL, all of these pointers are NULL */ DUK_ASSERT((new_p != NULL) || (new_e_k == NULL && new_e_pv == NULL && new_e_f == NULL && new_a == NULL && new_h == NULL)); DUK_DDD(DUK_DDDPRINT("new alloc size %ld, new_e_k=%p, new_e_pv=%p, new_e_f=%p, new_a=%p, new_h=%p", (long) new_alloc_size, (void *) new_e_k, (void *) new_e_pv, (void *) new_e_f, (void *) new_a, (void *) new_h)); /* * Migrate array part to start of entries if requested. * * Note: from an enumeration perspective the order of entry keys matters. * Array keys should appear wherever they appeared before the array abandon * operation. (This no longer matters much because keys are ES2015 sorted.) */ if (abandon_array) { /* Assuming new_a_size == 0, and that entry part contains * no conflicting keys, refcounts do not need to be adjusted for * the values, as they remain exactly the same. * * The keys, however, need to be interned, incref'd, and be * reachable for GC. Any intern attempt may trigger a GC and * claim any non-reachable strings, so every key must be reachable * at all times. Refcounts must be correct to satisfy refcount * assertions. * * A longjmp must not occur here, as the new_p allocation would * leak. Refcounts would come out correctly as the interned * strings are valstack tracked. */ DUK_ASSERT(new_a_size == 0); DUK_STATS_INC(thr->heap, stats_object_abandon_array); for (i = 0; i < DUK_HOBJECT_GET_ASIZE(obj); i++) { duk_tval *tv1; duk_tval *tv2; duk_hstring *key; DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL); tv1 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, i); if (DUK_TVAL_IS_UNUSED(tv1)) { continue; } DUK_ASSERT(new_p != NULL && new_e_k != NULL && new_e_pv != NULL && new_e_f != NULL); /* * Intern key via the valstack to ensure reachability behaves * properly. We must avoid longjmp's here so use non-checked * primitives. * * Note: duk_check_stack() potentially reallocs the valstack, * invalidating any duk_tval pointers to valstack. Callers * must be careful. */ #if 0 /* XXX: inject test */ if (1) { goto abandon_error; } #endif /* Never shrinks; auto-adds DUK_VALSTACK_INTERNAL_EXTRA, which * is generous. */ if (!duk_check_stack(thr, 1)) { goto abandon_error; } DUK_ASSERT_VALSTACK_SPACE(thr, 1); key = duk_heap_strtable_intern_u32(thr->heap, (duk_uint32_t) i); if (key == NULL) { goto abandon_error; } duk_push_hstring(thr, key); /* keep key reachable for GC etc; guaranteed not to fail */ /* Key is now reachable in the valstack, don't INCREF * the new allocation yet (we'll steal the refcounts * from the value stack once all keys are done). */ new_e_k[new_e_next] = key; tv2 = &new_e_pv[new_e_next].v; /* array entries are all plain values */ DUK_TVAL_SET_TVAL(tv2, tv1); new_e_f[new_e_next] = DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_ENUMERABLE | DUK_PROPDESC_FLAG_CONFIGURABLE; new_e_next++; /* Note: new_e_next matches pushed temp key count, and nothing can * fail above between the push and this point. */ } /* Steal refcounts from value stack. */ DUK_DDD(DUK_DDDPRINT("abandon array: pop %ld key temps from valstack", (long) new_e_next)); duk_pop_n_nodecref_unsafe(thr, (duk_idx_t) new_e_next); } /* * Copy keys and values in the entry part (compacting them at the same time). */ for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) { duk_hstring *key; DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL); key = DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i); if (key == NULL) { continue; } DUK_ASSERT(new_p != NULL && new_e_k != NULL && new_e_pv != NULL && new_e_f != NULL); new_e_k[new_e_next] = key; new_e_pv[new_e_next] = DUK_HOBJECT_E_GET_VALUE(thr->heap, obj, i); new_e_f[new_e_next] = DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, i); new_e_next++; } /* the entries [new_e_next, new_e_size_adjusted[ are left uninitialized on purpose (ok, not gc reachable) */ /* * Copy array elements to new array part. If the new array part is * larger, initialize the unused entries as UNUSED because they are * GC reachable. */ #if defined(DUK_USE_ASSERTIONS) /* Caller must have decref'd values above new_a_size (if that is necessary). */ if (!abandon_array) { for (i = new_a_size; i < DUK_HOBJECT_GET_ASIZE(obj); i++) { duk_tval *tv; tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, i); DUK_ASSERT(DUK_TVAL_IS_UNUSED(tv)); } } #endif if (new_a_size > DUK_HOBJECT_GET_ASIZE(obj)) { array_copy_size = sizeof(duk_tval) * DUK_HOBJECT_GET_ASIZE(obj); } else { array_copy_size = sizeof(duk_tval) * new_a_size; } DUK_ASSERT(new_a != NULL || array_copy_size == 0U); DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL || array_copy_size == 0U); DUK_ASSERT(DUK_HOBJECT_GET_ASIZE(obj) > 0 || array_copy_size == 0U); duk_memcpy_unsafe((void *) new_a, (const void *) DUK_HOBJECT_A_GET_BASE(thr->heap, obj), array_copy_size); for (i = DUK_HOBJECT_GET_ASIZE(obj); i < new_a_size; i++) { duk_tval *tv = &new_a[i]; DUK_TVAL_SET_UNUSED(tv); } /* * Rebuild the hash part always from scratch (guaranteed to finish * as long as caller gave consistent parameters). * * Any resize of hash part requires rehashing. In addition, by rehashing * get rid of any elements marked deleted (DUK__HASH_DELETED) which is critical * to ensuring the hash part never fills up. */ #if defined(DUK_USE_HOBJECT_HASH_PART) if (new_h_size == 0) { DUK_DDD(DUK_DDDPRINT("no hash part, no rehash")); } else { duk_uint32_t mask; DUK_ASSERT(new_h != NULL); /* fill new_h with u32 0xff = UNUSED */ DUK_ASSERT(new_h_size > 0); duk_memset(new_h, 0xff, sizeof(duk_uint32_t) * new_h_size); DUK_ASSERT(new_e_next <= new_h_size); /* equality not actually possible */ mask = new_h_size - 1; for (i = 0; i < new_e_next; i++) { duk_hstring *key = new_e_k[i]; duk_uint32_t j, step; DUK_ASSERT(key != NULL); j = DUK_HSTRING_GET_HASH(key) & mask; step = 1; /* Cache friendly but clustering prone. */ for (;;) { DUK_ASSERT(new_h[j] != DUK__HASH_DELETED); /* should never happen */ if (new_h[j] == DUK__HASH_UNUSED) { DUK_DDD(DUK_DDDPRINT("rebuild hit %ld -> %ld", (long) j, (long) i)); new_h[j] = (duk_uint32_t) i; break; } DUK_DDD(DUK_DDDPRINT("rebuild miss %ld, step %ld", (long) j, (long) step)); j = (j + step) & mask; /* Guaranteed to finish (hash is larger than #props). */ } } } #endif /* DUK_USE_HOBJECT_HASH_PART */ /* * Nice debug log. */ DUK_DD(DUK_DDPRINT("resized hobject %p props (%ld -> %ld bytes), from {p=%p,e_size=%ld,e_next=%ld,a_size=%ld,h_size=%ld} to " "{p=%p,e_size=%ld,e_next=%ld,a_size=%ld,h_size=%ld}, abandon_array=%ld, unadjusted new_e_size=%ld", (void *) obj, (long) DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE(obj), DUK_HOBJECT_GET_ASIZE(obj), DUK_HOBJECT_GET_HSIZE(obj)), (long) new_alloc_size, (void *) DUK_HOBJECT_GET_PROPS(thr->heap, obj), (long) DUK_HOBJECT_GET_ESIZE(obj), (long) DUK_HOBJECT_GET_ENEXT(obj), (long) DUK_HOBJECT_GET_ASIZE(obj), (long) DUK_HOBJECT_GET_HSIZE(obj), (void *) new_p, (long) new_e_size_adjusted, (long) new_e_next, (long) new_a_size, (long) new_h_size, (long) abandon_array, (long) new_e_size)); /* * All done, switch properties ('p') allocation to new one. */ DUK_FREE_CHECKED(thr, DUK_HOBJECT_GET_PROPS(thr->heap, obj)); /* NULL obj->p is OK */ DUK_HOBJECT_SET_PROPS(thr->heap, obj, new_p); DUK_HOBJECT_SET_ESIZE(obj, new_e_size_adjusted); DUK_HOBJECT_SET_ENEXT(obj, new_e_next); DUK_HOBJECT_SET_ASIZE(obj, new_a_size); DUK_HOBJECT_SET_HSIZE(obj, new_h_size); /* Clear array part flag only after switching. */ if (abandon_array) { DUK_HOBJECT_CLEAR_ARRAY_PART(obj); } DUK_DDD(DUK_DDDPRINT("resize result: %!O", (duk_heaphdr *) obj)); DUK_ASSERT(thr->heap->pf_prevent_count > 0); thr->heap->pf_prevent_count--; thr->heap->ms_base_flags = prev_ms_base_flags; #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(thr->heap->error_not_allowed == 1); thr->heap->error_not_allowed = prev_error_not_allowed; #endif /* * Post resize assertions. */ #if defined(DUK_USE_ASSERTIONS) /* XXX: post-checks (such as no duplicate keys) */ #endif return; /* * Abandon array failed. We don't need to DECREF anything * because the references in the new allocation are not * INCREF'd until abandon is complete. The string interned * keys are on the value stack and are handled normally by * unwind. */ abandon_error: alloc_failed: DUK_D(DUK_DPRINT("object property table resize failed")); DUK_FREE_CHECKED(thr, new_p); /* OK for NULL. */ thr->heap->pf_prevent_count--; thr->heap->ms_base_flags = prev_ms_base_flags; #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(thr->heap->error_not_allowed == 1); thr->heap->error_not_allowed = prev_error_not_allowed; #endif DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return;); } /* * Helpers to resize properties allocation on specific needs. */ DUK_INTERNAL void duk_hobject_resize_entrypart(duk_hthread *thr, duk_hobject *obj, duk_uint32_t new_e_size) { duk_uint32_t old_e_size; duk_uint32_t new_a_size; duk_uint32_t new_h_size; DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); old_e_size = DUK_HOBJECT_GET_ESIZE(obj); if (old_e_size > new_e_size) { new_e_size = old_e_size; } #if defined(DUK_USE_HOBJECT_HASH_PART) new_h_size = duk__get_default_h_size(new_e_size); #else new_h_size = 0; #endif new_a_size = DUK_HOBJECT_GET_ASIZE(obj); duk_hobject_realloc_props(thr, obj, new_e_size, new_a_size, new_h_size, 0); } /* Grow entry part allocation for one additional entry. */ DUK_LOCAL void duk__grow_props_for_new_entry_item(duk_hthread *thr, duk_hobject *obj) { duk_uint32_t old_e_used; /* actually used, non-NULL entries */ duk_uint32_t new_e_size_minimum; duk_uint32_t new_e_size; duk_uint32_t new_a_size; duk_uint32_t new_h_size; DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); /* Duktape 0.11.0 and prior tried to optimize the resize by not * counting the number of actually used keys prior to the resize. * This worked mostly well but also caused weird leak-like behavior * as in: test-bug-object-prop-alloc-unbounded.js. So, now we count * the keys explicitly to compute the new entry part size. */ old_e_used = duk__count_used_e_keys(thr, obj); new_e_size_minimum = old_e_used + 1; new_e_size = old_e_used + duk__get_min_grow_e(old_e_used); #if defined(DUK_USE_HOBJECT_HASH_PART) new_h_size = duk__get_default_h_size(new_e_size); #else new_h_size = 0; #endif new_a_size = DUK_HOBJECT_GET_ASIZE(obj); #if defined(DUK_USE_OBJSIZES16) if (new_e_size > DUK_UINT16_MAX) { new_e_size = DUK_UINT16_MAX; } if (new_h_size > DUK_UINT16_MAX) { new_h_size = DUK_UINT16_MAX; } if (new_a_size > DUK_UINT16_MAX) { new_a_size = DUK_UINT16_MAX; } #endif DUK_ASSERT(new_h_size == 0 || new_h_size >= new_e_size); if (!(new_e_size >= new_e_size_minimum)) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return;); } duk_hobject_realloc_props(thr, obj, new_e_size, new_a_size, new_h_size, 0); } /* Grow array part for a new highest array index. */ DUK_LOCAL void duk__grow_props_for_array_item(duk_hthread *thr, duk_hobject *obj, duk_uint32_t highest_arr_idx) { duk_uint32_t new_e_size; duk_uint32_t new_a_size; duk_uint32_t new_a_size_minimum; duk_uint32_t new_h_size; DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(highest_arr_idx >= DUK_HOBJECT_GET_ASIZE(obj)); new_e_size = DUK_HOBJECT_GET_ESIZE(obj); new_h_size = DUK_HOBJECT_GET_HSIZE(obj); new_a_size_minimum = highest_arr_idx + 1; new_a_size = highest_arr_idx + duk__get_min_grow_a(highest_arr_idx); DUK_ASSERT(new_a_size >= highest_arr_idx + 1); /* duk__get_min_grow_a() is always >= 1 */ #if defined(DUK_USE_OBJSIZES16) if (new_e_size > DUK_UINT16_MAX) { new_e_size = DUK_UINT16_MAX; } if (new_h_size > DUK_UINT16_MAX) { new_h_size = DUK_UINT16_MAX; } if (new_a_size > DUK_UINT16_MAX) { new_a_size = DUK_UINT16_MAX; } #endif if (!(new_a_size >= new_a_size_minimum)) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return;); } duk_hobject_realloc_props(thr, obj, new_e_size, new_a_size, new_h_size, 0); } /* Abandon array part, moving array entries into entries part. * This requires a props resize, which is a heavy operation. * We also compact the entries part while we're at it, although * this is not strictly required. */ DUK_LOCAL void duk__abandon_array_part(duk_hthread *thr, duk_hobject *obj) { duk_uint32_t new_e_size_minimum; duk_uint32_t new_e_size; duk_uint32_t new_a_size; duk_uint32_t new_h_size; duk_uint32_t e_used; /* actually used, non-NULL keys */ duk_uint32_t a_used; duk_uint32_t a_size; DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); e_used = duk__count_used_e_keys(thr, obj); duk__compute_a_stats(thr, obj, &a_used, &a_size); /* * Must guarantee all actually used array entries will fit into * new entry part. Add one growth step to ensure we don't run out * of space right away. */ new_e_size_minimum = e_used + a_used; new_e_size = new_e_size_minimum + duk__get_min_grow_e(new_e_size_minimum); new_a_size = 0; #if defined(DUK_USE_HOBJECT_HASH_PART) new_h_size = duk__get_default_h_size(new_e_size); #else new_h_size = 0; #endif #if defined(DUK_USE_OBJSIZES16) if (new_e_size > DUK_UINT16_MAX) { new_e_size = DUK_UINT16_MAX; } if (new_h_size > DUK_UINT16_MAX) { new_h_size = DUK_UINT16_MAX; } if (new_a_size > DUK_UINT16_MAX) { new_a_size = DUK_UINT16_MAX; } #endif if (!(new_e_size >= new_e_size_minimum)) { DUK_ERROR_ALLOC_FAILED(thr); DUK_WO_NORETURN(return;); } DUK_DD(DUK_DDPRINT("abandon array part for hobject %p, " "array stats before: e_used=%ld, a_used=%ld, a_size=%ld; " "resize to e_size=%ld, a_size=%ld, h_size=%ld", (void *) obj, (long) e_used, (long) a_used, (long) a_size, (long) new_e_size, (long) new_a_size, (long) new_h_size)); duk_hobject_realloc_props(thr, obj, new_e_size, new_a_size, new_h_size, 1); } /* * Compact an object. Minimizes allocation size for objects which are * not likely to be extended. This is useful for internal and non- * extensible objects, but can also be called for non-extensible objects. * May abandon the array part if it is computed to be too sparse. * * This call is relatively expensive, as it needs to scan both the * entries and the array part. * * The call may fail due to allocation error. */ DUK_INTERNAL void duk_hobject_compact_props(duk_hthread *thr, duk_hobject *obj) { duk_uint32_t e_size; /* currently used -> new size */ duk_uint32_t a_size; /* currently required */ duk_uint32_t a_used; /* actually used */ duk_uint32_t h_size; duk_bool_t abandon_array; DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); #if defined(DUK_USE_ROM_OBJECTS) if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) { DUK_DD(DUK_DDPRINT("ignore attempt to compact a rom object")); return; } #endif e_size = duk__count_used_e_keys(thr, obj); duk__compute_a_stats(thr, obj, &a_used, &a_size); DUK_DD(DUK_DDPRINT("compacting hobject, used e keys %ld, used a keys %ld, min a size %ld, " "resized array density would be: %ld/%ld = %lf", (long) e_size, (long) a_used, (long) a_size, (long) a_used, (long) a_size, (double) a_used / (double) a_size)); if (duk__abandon_array_density_check(a_used, a_size)) { DUK_DD(DUK_DDPRINT("decided to abandon array during compaction, a_used=%ld, a_size=%ld", (long) a_used, (long) a_size)); abandon_array = 1; e_size += a_used; a_size = 0; } else { DUK_DD(DUK_DDPRINT("decided to keep array during compaction")); abandon_array = 0; } #if defined(DUK_USE_HOBJECT_HASH_PART) if (e_size >= DUK_USE_HOBJECT_HASH_PROP_LIMIT) { h_size = duk__get_default_h_size(e_size); } else { h_size = 0; } #else h_size = 0; #endif DUK_DD(DUK_DDPRINT("compacting hobject -> new e_size %ld, new a_size=%ld, new h_size=%ld, abandon_array=%ld", (long) e_size, (long) a_size, (long) h_size, (long) abandon_array)); duk_hobject_realloc_props(thr, obj, e_size, a_size, h_size, abandon_array); } /* * Find an existing key from entry part either by linear scan or by * using the hash index (if it exists). * * Sets entry index (and possibly the hash index) to output variables, * which allows the caller to update the entry and hash entries in-place. * If entry is not found, both values are set to -1. If entry is found * but there is no hash part, h_idx is set to -1. */ DUK_INTERNAL duk_bool_t duk_hobject_find_entry(duk_heap *heap, duk_hobject *obj, duk_hstring *key, duk_int_t *e_idx, duk_int_t *h_idx) { DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT(e_idx != NULL); DUK_ASSERT(h_idx != NULL); DUK_UNREF(heap); if (DUK_LIKELY(DUK_HOBJECT_GET_HSIZE(obj) == 0)) { /* Linear scan: more likely because most objects are small. * This is an important fast path. * * XXX: this might be worth inlining for property lookups. */ duk_uint_fast32_t i; duk_uint_fast32_t n; duk_hstring **h_keys_base; DUK_DDD(DUK_DDDPRINT("duk_hobject_find_entry() using linear scan for lookup")); h_keys_base = DUK_HOBJECT_E_GET_KEY_BASE(heap, obj); n = DUK_HOBJECT_GET_ENEXT(obj); for (i = 0; i < n; i++) { if (h_keys_base[i] == key) { *e_idx = (duk_int_t) i; *h_idx = -1; return 1; } } } #if defined(DUK_USE_HOBJECT_HASH_PART) else { /* hash lookup */ duk_uint32_t n; duk_uint32_t i, step; duk_uint32_t *h_base; duk_uint32_t mask; DUK_DDD(DUK_DDDPRINT("duk_hobject_find_entry() using hash part for lookup")); h_base = DUK_HOBJECT_H_GET_BASE(heap, obj); n = DUK_HOBJECT_GET_HSIZE(obj); mask = n - 1; i = DUK_HSTRING_GET_HASH(key) & mask; step = 1; /* Cache friendly but clustering prone. */ for (;;) { duk_uint32_t t; DUK_ASSERT_DISABLE(i >= 0); /* unsigned */ DUK_ASSERT(i < DUK_HOBJECT_GET_HSIZE(obj)); t = h_base[i]; DUK_ASSERT(t == DUK__HASH_UNUSED || t == DUK__HASH_DELETED || (t < DUK_HOBJECT_GET_ESIZE(obj))); /* t >= 0 always true, unsigned */ if (t == DUK__HASH_UNUSED) { break; } else if (t == DUK__HASH_DELETED) { DUK_DDD(DUK_DDDPRINT("lookup miss (deleted) i=%ld, t=%ld", (long) i, (long) t)); } else { DUK_ASSERT(t < DUK_HOBJECT_GET_ESIZE(obj)); if (DUK_HOBJECT_E_GET_KEY(heap, obj, t) == key) { DUK_DDD(DUK_DDDPRINT("lookup hit i=%ld, t=%ld -> key %p", (long) i, (long) t, (void *) key)); *e_idx = (duk_int_t) t; *h_idx = (duk_int_t) i; return 1; } DUK_DDD(DUK_DDDPRINT("lookup miss i=%ld, t=%ld", (long) i, (long) t)); } i = (i + step) & mask; /* Guaranteed to finish (hash is larger than #props). */ } } #endif /* DUK_USE_HOBJECT_HASH_PART */ /* Not found, leave e_idx and h_idx unset. */ return 0; } /* For internal use: get non-accessor entry value */ DUK_INTERNAL duk_tval *duk_hobject_find_entry_tval_ptr(duk_heap *heap, duk_hobject *obj, duk_hstring *key) { duk_int_t e_idx; duk_int_t h_idx; DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_UNREF(heap); if (duk_hobject_find_entry(heap, obj, key, &e_idx, &h_idx)) { DUK_ASSERT(e_idx >= 0); if (!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap, obj, e_idx)) { return DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(heap, obj, e_idx); } } return NULL; } DUK_INTERNAL duk_tval *duk_hobject_find_entry_tval_ptr_stridx(duk_heap *heap, duk_hobject *obj, duk_small_uint_t stridx) { return duk_hobject_find_entry_tval_ptr(heap, obj, DUK_HEAP_GET_STRING(heap, stridx)); } /* For internal use: get non-accessor entry value and attributes */ DUK_INTERNAL duk_tval *duk_hobject_find_entry_tval_ptr_and_attrs(duk_heap *heap, duk_hobject *obj, duk_hstring *key, duk_uint_t *out_attrs) { duk_int_t e_idx; duk_int_t h_idx; DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT(out_attrs != NULL); DUK_UNREF(heap); if (duk_hobject_find_entry(heap, obj, key, &e_idx, &h_idx)) { DUK_ASSERT(e_idx >= 0); if (!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap, obj, e_idx)) { *out_attrs = DUK_HOBJECT_E_GET_FLAGS(heap, obj, e_idx); return DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(heap, obj, e_idx); } } /* If not found, out_attrs is left unset. */ return NULL; } /* For internal use: get array part value */ DUK_INTERNAL duk_tval *duk_hobject_find_array_entry_tval_ptr(duk_heap *heap, duk_hobject *obj, duk_uarridx_t i) { duk_tval *tv; DUK_ASSERT(obj != NULL); DUK_UNREF(heap); if (!DUK_HOBJECT_HAS_ARRAY_PART(obj)) { return NULL; } if (i >= DUK_HOBJECT_GET_ASIZE(obj)) { return NULL; } tv = DUK_HOBJECT_A_GET_VALUE_PTR(heap, obj, i); return tv; } /* * Allocate and initialize a new entry, resizing the properties allocation * if necessary. Returns entry index (e_idx) or throws an error if alloc fails. * * Sets the key of the entry (increasing the key's refcount), and updates * the hash part if it exists. Caller must set value and flags, and update * the entry value refcount. A decref for the previous value is not necessary. */ DUK_LOCAL duk_int_t duk__hobject_alloc_entry_checked(duk_hthread *thr, duk_hobject *obj, duk_hstring *key) { duk_uint32_t idx; DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT(DUK_HOBJECT_GET_ENEXT(obj) <= DUK_HOBJECT_GET_ESIZE(obj)); #if defined(DUK_USE_ASSERTIONS) /* key must not already exist in entry part */ { duk_uint_fast32_t i; for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) { DUK_ASSERT(DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i) != key); } } #endif if (DUK_HOBJECT_GET_ENEXT(obj) >= DUK_HOBJECT_GET_ESIZE(obj)) { /* only need to guarantee 1 more slot, but allocation growth is in chunks */ DUK_DDD(DUK_DDDPRINT("entry part full, allocate space for one more entry")); duk__grow_props_for_new_entry_item(thr, obj); } DUK_ASSERT(DUK_HOBJECT_GET_ENEXT(obj) < DUK_HOBJECT_GET_ESIZE(obj)); idx = DUK_HOBJECT_POSTINC_ENEXT(obj); /* previous value is assumed to be garbage, so don't touch it */ DUK_HOBJECT_E_SET_KEY(thr->heap, obj, idx, key); DUK_HSTRING_INCREF(thr, key); #if defined(DUK_USE_HOBJECT_HASH_PART) if (DUK_UNLIKELY(DUK_HOBJECT_GET_HSIZE(obj) > 0)) { duk_uint32_t n, mask; duk_uint32_t i, step; duk_uint32_t *h_base = DUK_HOBJECT_H_GET_BASE(thr->heap, obj); n = DUK_HOBJECT_GET_HSIZE(obj); mask = n - 1; i = DUK_HSTRING_GET_HASH(key) & mask; step = 1; /* Cache friendly but clustering prone. */ for (;;) { duk_uint32_t t = h_base[i]; if (t == DUK__HASH_UNUSED || t == DUK__HASH_DELETED) { DUK_DDD(DUK_DDDPRINT("duk__hobject_alloc_entry_checked() inserted key into hash part, %ld -> %ld", (long) i, (long) idx)); DUK_ASSERT_DISABLE(i >= 0); /* unsigned */ DUK_ASSERT(i < DUK_HOBJECT_GET_HSIZE(obj)); DUK_ASSERT_DISABLE(idx >= 0); DUK_ASSERT(idx < DUK_HOBJECT_GET_ESIZE(obj)); h_base[i] = idx; break; } DUK_DDD(DUK_DDDPRINT("duk__hobject_alloc_entry_checked() miss %ld", (long) i)); i = (i + step) & mask; /* Guaranteed to finish (hash is larger than #props). */ } } #endif /* DUK_USE_HOBJECT_HASH_PART */ /* Note: we could return the hash index here too, but it's not * needed right now. */ DUK_ASSERT_DISABLE(idx >= 0); DUK_ASSERT(idx < DUK_HOBJECT_GET_ESIZE(obj)); DUK_ASSERT(idx < DUK_HOBJECT_GET_ENEXT(obj)); return (duk_int_t) idx; } /* * Object internal value * * Returned value is guaranteed to be reachable / incref'd, caller does not need * to incref OR decref. No proxies or accessors are invoked, no prototype walk. */ DUK_INTERNAL duk_tval *duk_hobject_get_internal_value_tval_ptr(duk_heap *heap, duk_hobject *obj) { return duk_hobject_find_entry_tval_ptr_stridx(heap, obj, DUK_STRIDX_INT_VALUE); } DUK_LOCAL duk_heaphdr *duk_hobject_get_internal_value_heaphdr(duk_heap *heap, duk_hobject *obj) { duk_tval *tv; DUK_ASSERT(heap != NULL); DUK_ASSERT(obj != NULL); tv = duk_hobject_get_internal_value_tval_ptr(heap, obj); if (tv != NULL) { duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv); DUK_ASSERT(h != NULL); return h; } return NULL; } DUK_INTERNAL duk_hstring *duk_hobject_get_internal_value_string(duk_heap *heap, duk_hobject *obj) { duk_hstring *h; h = (duk_hstring *) duk_hobject_get_internal_value_heaphdr(heap, obj); if (h != NULL) { DUK_ASSERT(DUK_HEAPHDR_IS_STRING((duk_heaphdr *) h)); } return h; } DUK_LOCAL duk_hobject *duk__hobject_get_entry_object_stridx(duk_heap *heap, duk_hobject *obj, duk_small_uint_t stridx) { duk_tval *tv; duk_hobject *h; tv = duk_hobject_find_entry_tval_ptr_stridx(heap, obj, stridx); if (tv != NULL && DUK_TVAL_IS_OBJECT(tv)) { h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); return h; } return NULL; } DUK_INTERNAL duk_harray *duk_hobject_get_formals(duk_hthread *thr, duk_hobject *obj) { duk_harray *h; h = (duk_harray *) duk__hobject_get_entry_object_stridx(thr->heap, obj, DUK_STRIDX_INT_FORMALS); if (h != NULL) { DUK_ASSERT(DUK_HOBJECT_IS_ARRAY((duk_hobject *) h)); DUK_ASSERT(h->length <= DUK_HOBJECT_GET_ASIZE((duk_hobject *) h)); } return h; } DUK_INTERNAL duk_hobject *duk_hobject_get_varmap(duk_hthread *thr, duk_hobject *obj) { duk_hobject *h; h = duk__hobject_get_entry_object_stridx(thr->heap, obj, DUK_STRIDX_INT_VARMAP); return h; } /* * Arguments handling helpers (argument map mainly). * * An arguments object has exotic behavior for some numeric indices. * Accesses may translate to identifier operations which may have * arbitrary side effects (potentially invalidating any duk_tval * pointers). */ /* Lookup 'key' from arguments internal 'map', perform a variable lookup * if mapped, and leave the result on top of stack (and return non-zero). * Used in E5 Section 10.6 algorithms [[Get]] and [[GetOwnProperty]]. */ DUK_LOCAL duk_bool_t duk__lookup_arguments_map(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc, duk_hobject **out_map, duk_hobject **out_varenv) { duk_hobject *map; duk_hobject *varenv; duk_bool_t rc; DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_DDD(DUK_DDDPRINT("arguments map lookup: thr=%p, obj=%p, key=%p, temp_desc=%p " "(obj -> %!O, key -> %!O)", (void *) thr, (void *) obj, (void *) key, (void *) temp_desc, (duk_heaphdr *) obj, (duk_heaphdr *) key)); if (!duk_hobject_get_own_propdesc(thr, obj, DUK_HTHREAD_STRING_INT_MAP(thr), temp_desc, DUK_GETDESC_FLAG_PUSH_VALUE)) { DUK_DDD(DUK_DDDPRINT("-> no 'map'")); return 0; } map = duk_require_hobject(thr, -1); DUK_ASSERT(map != NULL); duk_pop_unsafe(thr); /* map is reachable through obj */ if (!duk_hobject_get_own_propdesc(thr, map, key, temp_desc, DUK_GETDESC_FLAG_PUSH_VALUE)) { DUK_DDD(DUK_DDDPRINT("-> 'map' exists, but key not in map")); return 0; } /* [... varname] */ DUK_DDD(DUK_DDDPRINT("-> 'map' exists, and contains key, key is mapped to argument/variable binding %!T", (duk_tval *) duk_get_tval(thr, -1))); DUK_ASSERT(duk_is_string(thr, -1)); /* guaranteed when building arguments */ /* get varenv for varname (callee's declarative lexical environment) */ rc = duk_hobject_get_own_propdesc(thr, obj, DUK_HTHREAD_STRING_INT_VARENV(thr), temp_desc, DUK_GETDESC_FLAG_PUSH_VALUE); DUK_UNREF(rc); DUK_ASSERT(rc != 0); /* arguments MUST have an initialized lexical environment reference */ varenv = duk_require_hobject(thr, -1); DUK_ASSERT(varenv != NULL); duk_pop_unsafe(thr); /* varenv remains reachable through 'obj' */ DUK_DDD(DUK_DDDPRINT("arguments varenv is: %!dO", (duk_heaphdr *) varenv)); /* success: leave varname in stack */ *out_map = map; *out_varenv = varenv; return 1; /* [... varname] */ } /* Lookup 'key' from arguments internal 'map', and leave replacement value * on stack top if mapped (and return non-zero). * Used in E5 Section 10.6 algorithm for [[GetOwnProperty]] (used by [[Get]]). */ DUK_LOCAL duk_bool_t duk__check_arguments_map_for_get(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc) { duk_hobject *map; duk_hobject *varenv; duk_hstring *varname; DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); if (!duk__lookup_arguments_map(thr, obj, key, temp_desc, &map, &varenv)) { DUK_DDD(DUK_DDDPRINT("arguments: key not mapped, no exotic get behavior")); return 0; } /* [... varname] */ varname = duk_require_hstring(thr, -1); DUK_ASSERT(varname != NULL); duk_pop_unsafe(thr); /* varname is still reachable */ DUK_DDD(DUK_DDDPRINT("arguments object automatic getvar for a bound variable; " "key=%!O, varname=%!O", (duk_heaphdr *) key, (duk_heaphdr *) varname)); (void) duk_js_getvar_envrec(thr, varenv, varname, 1 /*throw*/); /* [... value this_binding] */ duk_pop_unsafe(thr); /* leave result on stack top */ return 1; } /* Lookup 'key' from arguments internal 'map', perform a variable write if mapped. * Used in E5 Section 10.6 algorithm for [[DefineOwnProperty]] (used by [[Put]]). * Assumes stack top contains 'put' value (which is NOT popped). */ DUK_LOCAL void duk__check_arguments_map_for_put(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc, duk_bool_t throw_flag) { duk_hobject *map; duk_hobject *varenv; duk_hstring *varname; DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); if (!duk__lookup_arguments_map(thr, obj, key, temp_desc, &map, &varenv)) { DUK_DDD(DUK_DDDPRINT("arguments: key not mapped, no exotic put behavior")); return; } /* [... put_value varname] */ varname = duk_require_hstring(thr, -1); DUK_ASSERT(varname != NULL); duk_pop_unsafe(thr); /* varname is still reachable */ DUK_DDD(DUK_DDDPRINT("arguments object automatic putvar for a bound variable; " "key=%!O, varname=%!O, value=%!T", (duk_heaphdr *) key, (duk_heaphdr *) varname, (duk_tval *) duk_require_tval(thr, -1))); /* [... put_value] */ /* * Note: although arguments object variable mappings are only established * for non-strict functions (and a call to a non-strict function created * the arguments object in question), an inner strict function may be doing * the actual property write. Hence the throw_flag applied here comes from * the property write call. */ duk_js_putvar_envrec(thr, varenv, varname, duk_require_tval(thr, -1), throw_flag); /* [... put_value] */ } /* Lookup 'key' from arguments internal 'map', delete mapping if found. * Used in E5 Section 10.6 algorithm for [[Delete]]. Note that the * variable/argument itself (where the map points) is not deleted. */ DUK_LOCAL void duk__check_arguments_map_for_delete(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc) { duk_hobject *map; DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); if (!duk_hobject_get_own_propdesc(thr, obj, DUK_HTHREAD_STRING_INT_MAP(thr), temp_desc, DUK_GETDESC_FLAG_PUSH_VALUE)) { DUK_DDD(DUK_DDDPRINT("arguments: key not mapped, no exotic delete behavior")); return; } map = duk_require_hobject(thr, -1); DUK_ASSERT(map != NULL); duk_pop_unsafe(thr); /* map is reachable through obj */ DUK_DDD(DUK_DDDPRINT("-> have 'map', delete key %!O from map (if exists)); ignore result", (duk_heaphdr *) key)); /* Note: no recursion issue, we can trust 'map' to behave */ DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_BEHAVIOR(map)); DUK_DDD(DUK_DDDPRINT("map before deletion: %!O", (duk_heaphdr *) map)); (void) duk_hobject_delprop_raw(thr, map, key, 0); /* ignore result */ DUK_DDD(DUK_DDDPRINT("map after deletion: %!O", (duk_heaphdr *) map)); } /* * ECMAScript compliant [[GetOwnProperty]](P), for internal use only. * * If property is found: * - Fills descriptor fields to 'out_desc' * - If DUK_GETDESC_FLAG_PUSH_VALUE is set, pushes a value related to the * property onto the stack ('undefined' for accessor properties). * - Returns non-zero * * If property is not found: * - 'out_desc' is left in untouched state (possibly garbage) * - Nothing is pushed onto the stack (not even with DUK_GETDESC_FLAG_PUSH_VALUE * set) * - Returns zero * * Notes: * * - Getting a property descriptor may cause an allocation (and hence * GC) to take place, hence reachability and refcount of all related * values matter. Reallocation of value stack, properties, etc may * invalidate many duk_tval pointers (concretely, those which reside * in memory areas subject to reallocation). However, heap object * pointers are never affected (heap objects have stable pointers). * * - The value of a plain property is always reachable and has a non-zero * reference count. * * - The value of a virtual property is not necessarily reachable from * elsewhere and may have a refcount of zero. Hence we push it onto * the valstack for the caller, which ensures it remains reachable * while it is needed. * * - There are no virtual accessor properties. Hence, all getters and * setters are always related to concretely stored properties, which * ensures that the get/set functions in the resulting descriptor are * reachable and have non-zero refcounts. Should there be virtual * accessor properties later, this would need to change. */ DUK_LOCAL duk_bool_t duk__get_own_propdesc_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_uint32_t arr_idx, duk_propdesc *out_desc, duk_small_uint_t flags) { duk_tval *tv; DUK_DDD(DUK_DDDPRINT("duk_hobject_get_own_propdesc: thr=%p, obj=%p, key=%p, out_desc=%p, flags=%lx, " "arr_idx=%ld (obj -> %!O, key -> %!O)", (void *) thr, (void *) obj, (void *) key, (void *) out_desc, (long) flags, (long) arr_idx, (duk_heaphdr *) obj, (duk_heaphdr *) key)); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT(out_desc != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_STATS_INC(thr->heap, stats_getownpropdesc_count); /* Each code path returning 1 (= found) must fill in all the output * descriptor fields. We don't do it beforehand because it'd be * unnecessary work if the property isn't found and would happen * multiple times for an inheritance chain. */ DUK_ASSERT_SET_GARBAGE(out_desc, sizeof(*out_desc)); #if 0 out_desc->flags = 0; out_desc->get = NULL; out_desc->set = NULL; out_desc->e_idx = -1; out_desc->h_idx = -1; out_desc->a_idx = -1; #endif /* * Try entries part first because it's the common case. * * Array part lookups are usually handled by the array fast path, and * are not usually inherited. Array and entry parts never contain the * same keys so the entry part vs. array part order doesn't matter. */ if (duk_hobject_find_entry(thr->heap, obj, key, &out_desc->e_idx, &out_desc->h_idx)) { duk_int_t e_idx = out_desc->e_idx; DUK_ASSERT(out_desc->e_idx >= 0); out_desc->a_idx = -1; out_desc->flags = DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, e_idx); out_desc->get = NULL; out_desc->set = NULL; if (DUK_UNLIKELY(out_desc->flags & DUK_PROPDESC_FLAG_ACCESSOR)) { DUK_DDD(DUK_DDDPRINT("-> found accessor property in entry part")); out_desc->get = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, obj, e_idx); out_desc->set = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, obj, e_idx); if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) { /* a dummy undefined value is pushed to make valstack * behavior uniform for caller */ duk_push_undefined(thr); } } else { DUK_DDD(DUK_DDDPRINT("-> found plain property in entry part")); tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, e_idx); if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) { duk_push_tval(thr, tv); } } goto prop_found; } /* * Try array part. */ if (DUK_HOBJECT_HAS_ARRAY_PART(obj) && arr_idx != DUK__NO_ARRAY_INDEX) { if (arr_idx < DUK_HOBJECT_GET_ASIZE(obj)) { tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, arr_idx); if (!DUK_TVAL_IS_UNUSED(tv)) { DUK_DDD(DUK_DDDPRINT("-> found in array part")); if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) { duk_push_tval(thr, tv); } /* implicit attributes */ out_desc->flags = DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_CONFIGURABLE | DUK_PROPDESC_FLAG_ENUMERABLE; out_desc->get = NULL; out_desc->set = NULL; out_desc->e_idx = -1; out_desc->h_idx = -1; out_desc->a_idx = (duk_int_t) arr_idx; /* XXX: limit 2G due to being signed */ goto prop_found; } } } DUK_DDD(DUK_DDDPRINT("-> not found as a concrete property")); /* * Not found as a concrete property, check for virtual properties. */ if (!DUK_HOBJECT_HAS_VIRTUAL_PROPERTIES(obj)) { /* Quick skip. */ goto prop_not_found; } if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)) { duk_harray *a; DUK_DDD(DUK_DDDPRINT("array object exotic property get for key: %!O, arr_idx: %ld", (duk_heaphdr *) key, (long) arr_idx)); a = (duk_harray *) obj; DUK_HARRAY_ASSERT_VALID(a); if (key == DUK_HTHREAD_STRING_LENGTH(thr)) { DUK_DDD(DUK_DDDPRINT("-> found, key is 'length', length exotic behavior")); if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) { duk_push_uint(thr, (duk_uint_t) a->length); } out_desc->flags = DUK_PROPDESC_FLAG_VIRTUAL; if (DUK_HARRAY_LENGTH_WRITABLE(a)) { out_desc->flags |= DUK_PROPDESC_FLAG_WRITABLE; } out_desc->get = NULL; out_desc->set = NULL; out_desc->e_idx = -1; out_desc->h_idx = -1; out_desc->a_idx = -1; DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj)); goto prop_found_noexotic; /* cannot be arguments exotic */ } } else if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(obj)) { DUK_DDD(DUK_DDDPRINT("string object exotic property get for key: %!O, arr_idx: %ld", (duk_heaphdr *) key, (long) arr_idx)); /* XXX: charlen; avoid multiple lookups? */ if (arr_idx != DUK__NO_ARRAY_INDEX) { duk_hstring *h_val; DUK_DDD(DUK_DDDPRINT("array index exists")); h_val = duk_hobject_get_internal_value_string(thr->heap, obj); DUK_ASSERT(h_val); if (arr_idx < DUK_HSTRING_GET_CHARLEN(h_val)) { DUK_DDD(DUK_DDDPRINT("-> found, array index inside string")); if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) { duk_push_hstring(thr, h_val); duk_substring(thr, -1, arr_idx, arr_idx + 1); /* [str] -> [substr] */ } out_desc->flags = DUK_PROPDESC_FLAG_ENUMERABLE | /* E5 Section 15.5.5.2 */ DUK_PROPDESC_FLAG_VIRTUAL; out_desc->get = NULL; out_desc->set = NULL; out_desc->e_idx = -1; out_desc->h_idx = -1; out_desc->a_idx = -1; DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj)); goto prop_found_noexotic; /* cannot be arguments exotic */ } else { /* index is above internal string length -> property is fully normal */ DUK_DDD(DUK_DDDPRINT("array index outside string -> normal property")); } } else if (key == DUK_HTHREAD_STRING_LENGTH(thr)) { duk_hstring *h_val; DUK_DDD(DUK_DDDPRINT("-> found, key is 'length', length exotic behavior")); h_val = duk_hobject_get_internal_value_string(thr->heap, obj); DUK_ASSERT(h_val != NULL); if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) { duk_push_uint(thr, (duk_uint_t) DUK_HSTRING_GET_CHARLEN(h_val)); } out_desc->flags = DUK_PROPDESC_FLAG_VIRTUAL; /* E5 Section 15.5.5.1 */ out_desc->get = NULL; out_desc->set = NULL; out_desc->e_idx = -1; out_desc->h_idx = -1; out_desc->a_idx = -1; DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj)); goto prop_found_noexotic; /* cannot be arguments exotic */ } } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) else if (DUK_HOBJECT_IS_BUFOBJ(obj)) { duk_hbufobj *h_bufobj; duk_uint_t byte_off; duk_small_uint_t elem_size; h_bufobj = (duk_hbufobj *) obj; DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); DUK_DDD(DUK_DDDPRINT("bufobj property get for key: %!O, arr_idx: %ld", (duk_heaphdr *) key, (long) arr_idx)); if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HBUFOBJ_HAS_VIRTUAL_INDICES(h_bufobj)) { DUK_DDD(DUK_DDDPRINT("array index exists")); /* Careful with wrapping: arr_idx upshift may easily wrap, whereas * length downshift won't. */ if (arr_idx < (h_bufobj->length >> h_bufobj->shift)) { byte_off = arr_idx << h_bufobj->shift; /* no wrap assuming h_bufobj->length is valid */ elem_size = (duk_small_uint_t) (1U << h_bufobj->shift); if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) { duk_uint8_t *data; if (h_bufobj->buf != NULL && DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h_bufobj, byte_off + elem_size)) { data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf) + h_bufobj->offset + byte_off; duk_hbufobj_push_validated_read(thr, h_bufobj, data, elem_size); } else { DUK_D(DUK_DPRINT("bufobj access out of underlying buffer, ignoring (read zero)")); duk_push_uint(thr, 0); } } out_desc->flags = DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_VIRTUAL; if (DUK_HOBJECT_GET_CLASS_NUMBER(obj) != DUK_HOBJECT_CLASS_ARRAYBUFFER) { /* ArrayBuffer indices are non-standard and are * non-enumerable to avoid their serialization. */ out_desc->flags |= DUK_PROPDESC_FLAG_ENUMERABLE; } out_desc->get = NULL; out_desc->set = NULL; out_desc->e_idx = -1; out_desc->h_idx = -1; out_desc->a_idx = -1; DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj)); goto prop_found_noexotic; /* cannot be e.g. arguments exotic, since exotic 'traits' are mutually exclusive */ } else { /* index is above internal buffer length -> property is fully normal */ DUK_DDD(DUK_DDDPRINT("array index outside buffer -> normal property")); } } else if (key == DUK_HTHREAD_STRING_LENGTH(thr) && DUK_HBUFOBJ_HAS_VIRTUAL_INDICES(h_bufobj)) { DUK_DDD(DUK_DDDPRINT("-> found, key is 'length', length exotic behavior")); if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) { /* Length in elements: take into account shift, but * intentionally don't check the underlying buffer here. */ duk_push_uint(thr, h_bufobj->length >> h_bufobj->shift); } out_desc->flags = DUK_PROPDESC_FLAG_VIRTUAL; out_desc->get = NULL; out_desc->set = NULL; out_desc->e_idx = -1; out_desc->h_idx = -1; out_desc->a_idx = -1; DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj)); goto prop_found_noexotic; /* cannot be arguments exotic */ } } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* Array properties have exotic behavior but they are concrete, * so no special handling here. * * Arguments exotic behavior (E5 Section 10.6, [[GetOwnProperty]] * is only relevant as a post-check implemented below; hence no * check here. */ /* * Not found as concrete or virtual. */ prop_not_found: DUK_DDD(DUK_DDDPRINT("-> not found (virtual, entry part, or array part)")); DUK_STATS_INC(thr->heap, stats_getownpropdesc_miss); return 0; /* * Found. * * Arguments object has exotic post-processing, see E5 Section 10.6, * description of [[GetOwnProperty]] variant for arguments. */ prop_found: DUK_DDD(DUK_DDDPRINT("-> property found, checking for arguments exotic post-behavior")); /* Notes: * - Only numbered indices are relevant, so arr_idx fast reject is good * (this is valid unless there are more than 4**32-1 arguments). * - Since variable lookup has no side effects, this can be skipped if * DUK_GETDESC_FLAG_PUSH_VALUE is not set. */ if (DUK_UNLIKELY(DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj) && arr_idx != DUK__NO_ARRAY_INDEX && (flags & DUK_GETDESC_FLAG_PUSH_VALUE))) { duk_propdesc temp_desc; /* Magically bound variable cannot be an accessor. However, * there may be an accessor property (or a plain property) in * place with magic behavior removed. This happens e.g. when * a magic property is redefined with defineProperty(). * Cannot assert for "not accessor" here. */ /* replaces top of stack with new value if necessary */ DUK_ASSERT((flags & DUK_GETDESC_FLAG_PUSH_VALUE) != 0); /* This can perform a variable lookup but only into a declarative * environment which has no side effects. */ if (duk__check_arguments_map_for_get(thr, obj, key, &temp_desc)) { DUK_DDD(DUK_DDDPRINT("-> arguments exotic behavior overrides result: %!T -> %!T", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); /* [... old_result result] -> [... result] */ duk_remove_m2(thr); } } prop_found_noexotic: DUK_STATS_INC(thr->heap, stats_getownpropdesc_hit); return 1; } DUK_INTERNAL duk_bool_t duk_hobject_get_own_propdesc(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *out_desc, duk_small_uint_t flags) { DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT(out_desc != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); return duk__get_own_propdesc_raw(thr, obj, key, DUK_HSTRING_GET_ARRIDX_SLOW(key), out_desc, flags); } /* * ECMAScript compliant [[GetProperty]](P), for internal use only. * * If property is found: * - Fills descriptor fields to 'out_desc' * - If DUK_GETDESC_FLAG_PUSH_VALUE is set, pushes a value related to the * property onto the stack ('undefined' for accessor properties). * - Returns non-zero * * If property is not found: * - 'out_desc' is left in untouched state (possibly garbage) * - Nothing is pushed onto the stack (not even with DUK_GETDESC_FLAG_PUSH_VALUE * set) * - Returns zero * * May cause arbitrary side effects and invalidate (most) duk_tval * pointers. */ DUK_LOCAL duk_bool_t duk__get_propdesc(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *out_desc, duk_small_uint_t flags) { duk_hobject *curr; duk_uint32_t arr_idx; duk_uint_t sanity; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT(out_desc != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_STATS_INC(thr->heap, stats_getpropdesc_count); arr_idx = DUK_HSTRING_GET_ARRIDX_FAST(key); DUK_DDD(DUK_DDDPRINT("duk__get_propdesc: thr=%p, obj=%p, key=%p, out_desc=%p, flags=%lx, " "arr_idx=%ld (obj -> %!O, key -> %!O)", (void *) thr, (void *) obj, (void *) key, (void *) out_desc, (long) flags, (long) arr_idx, (duk_heaphdr *) obj, (duk_heaphdr *) key)); curr = obj; DUK_ASSERT(curr != NULL); sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY; do { if (duk__get_own_propdesc_raw(thr, curr, key, arr_idx, out_desc, flags)) { /* stack contains value (if requested), 'out_desc' is set */ DUK_STATS_INC(thr->heap, stats_getpropdesc_hit); return 1; } /* not found in 'curr', next in prototype chain; impose max depth */ if (DUK_UNLIKELY(sanity-- == 0)) { if (flags & DUK_GETDESC_FLAG_IGNORE_PROTOLOOP) { /* treat like property not found */ break; } else { DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT); DUK_WO_NORETURN(return 0;); } } curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, curr); } while (curr != NULL); /* out_desc is left untouched (possibly garbage), caller must use return * value to determine whether out_desc can be looked up */ DUK_STATS_INC(thr->heap, stats_getpropdesc_miss); return 0; } /* * Shallow fast path checks for accessing array elements with numeric * indices. The goal is to try to avoid coercing an array index to an * (interned) string for the most common lookups, in particular, for * standard Array objects. * * Interning is avoided but only for a very narrow set of cases: * - Object has array part, index is within array allocation, and * value is not unused (= key exists) * - Object has no interfering exotic behavior (e.g. arguments or * string object exotic behaviors interfere, array exotic * behavior does not). * * Current shortcoming: if key does not exist (even if it is within * the array allocation range) a slow path lookup with interning is * always required. This can probably be fixed so that there is a * quick fast path for non-existent elements as well, at least for * standard Array objects. */ #if defined(DUK_USE_ARRAY_PROP_FASTPATH) DUK_LOCAL duk_tval *duk__getprop_shallow_fastpath_array_tval(duk_hthread *thr, duk_hobject *obj, duk_tval *tv_key) { duk_tval *tv; duk_uint32_t idx; DUK_UNREF(thr); if (!(DUK_HOBJECT_HAS_ARRAY_PART(obj) && !DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj) && !DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(obj) && !DUK_HOBJECT_IS_BUFOBJ(obj) && !DUK_HOBJECT_IS_PROXY(obj))) { /* Must have array part and no conflicting exotic behaviors. * Doesn't need to have array special behavior, e.g. Arguments * object has array part. */ return NULL; } /* Arrays never have other exotic behaviors. */ DUK_DDD(DUK_DDDPRINT("fast path attempt (no exotic string/arguments/buffer " "behavior, object has array part)")); #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_key)) { idx = duk__tval_fastint_to_arr_idx(tv_key); } else #endif if (DUK_TVAL_IS_DOUBLE(tv_key)) { idx = duk__tval_number_to_arr_idx(tv_key); } else { DUK_DDD(DUK_DDDPRINT("key is not a number")); return NULL; } /* If index is not valid, idx will be DUK__NO_ARRAY_INDEX which * is 0xffffffffUL. We don't need to check for that explicitly * because 0xffffffffUL will never be inside object 'a_size'. */ if (idx >= DUK_HOBJECT_GET_ASIZE(obj)) { DUK_DDD(DUK_DDDPRINT("key is not an array index or outside array part")); return NULL; } DUK_ASSERT(idx != 0xffffffffUL); DUK_ASSERT(idx != DUK__NO_ARRAY_INDEX); /* XXX: for array instances we could take a shortcut here and assume * Array.prototype doesn't contain an array index property. */ DUK_DDD(DUK_DDDPRINT("key is a valid array index and inside array part")); tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, idx); if (!DUK_TVAL_IS_UNUSED(tv)) { DUK_DDD(DUK_DDDPRINT("-> fast path successful")); return tv; } DUK_DDD(DUK_DDDPRINT("fast path attempt failed, fall back to slow path")); return NULL; } DUK_LOCAL duk_bool_t duk__putprop_shallow_fastpath_array_tval(duk_hthread *thr, duk_hobject *obj, duk_tval *tv_key, duk_tval *tv_val) { duk_tval *tv; duk_harray *a; duk_uint32_t idx; duk_uint32_t old_len, new_len; if (!(DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj) && DUK_HOBJECT_HAS_ARRAY_PART(obj) && DUK_HOBJECT_HAS_EXTENSIBLE(obj))) { return 0; } DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)); /* caller ensures */ a = (duk_harray *) obj; DUK_HARRAY_ASSERT_VALID(a); #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_key)) { idx = duk__tval_fastint_to_arr_idx(tv_key); } else #endif if (DUK_TVAL_IS_DOUBLE(tv_key)) { idx = duk__tval_number_to_arr_idx(tv_key); } else { DUK_DDD(DUK_DDDPRINT("key is not a number")); return 0; } /* If index is not valid, idx will be DUK__NO_ARRAY_INDEX which * is 0xffffffffUL. We don't need to check for that explicitly * because 0xffffffffUL will never be inside object 'a_size'. */ if (idx >= DUK_HOBJECT_GET_ASIZE(obj)) { /* for resizing of array part, use slow path */ return 0; } DUK_ASSERT(idx != 0xffffffffUL); DUK_ASSERT(idx != DUK__NO_ARRAY_INDEX); old_len = a->length; if (idx >= old_len) { DUK_DDD(DUK_DDDPRINT("write new array entry requires length update " "(arr_idx=%ld, old_len=%ld)", (long) idx, (long) old_len)); if (DUK_HARRAY_LENGTH_NONWRITABLE(a)) { /* The correct behavior here is either a silent error * or a TypeError, depending on strictness. Fall back * to the slow path to handle the situation. */ return 0; } new_len = idx + 1; ((duk_harray *) obj)->length = new_len; } tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, idx); DUK_TVAL_SET_TVAL_UPDREF(thr, tv, tv_val); /* side effects */ DUK_DDD(DUK_DDDPRINT("array fast path success for index %ld", (long) idx)); return 1; } #endif /* DUK_USE_ARRAY_PROP_FASTPATH */ /* * Fast path for bufobj getprop/putprop */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_LOCAL duk_bool_t duk__getprop_fastpath_bufobj_tval(duk_hthread *thr, duk_hobject *obj, duk_tval *tv_key) { duk_uint32_t idx; duk_hbufobj *h_bufobj; duk_uint_t byte_off; duk_small_uint_t elem_size; duk_uint8_t *data; if (!DUK_HOBJECT_IS_BUFOBJ(obj)) { return 0; } h_bufobj = (duk_hbufobj *) obj; if (!DUK_HBUFOBJ_HAS_VIRTUAL_INDICES(h_bufobj)) { return 0; } #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_key)) { idx = duk__tval_fastint_to_arr_idx(tv_key); } else #endif if (DUK_TVAL_IS_DOUBLE(tv_key)) { idx = duk__tval_number_to_arr_idx(tv_key); } else { return 0; } /* If index is not valid, idx will be DUK__NO_ARRAY_INDEX which * is 0xffffffffUL. We don't need to check for that explicitly * because 0xffffffffUL will never be inside bufobj length. */ /* Careful with wrapping (left shifting idx would be unsafe). */ if (idx >= (h_bufobj->length >> h_bufobj->shift)) { return 0; } DUK_ASSERT(idx != DUK__NO_ARRAY_INDEX); byte_off = idx << h_bufobj->shift; /* no wrap assuming h_bufobj->length is valid */ elem_size = (duk_small_uint_t) (1U << h_bufobj->shift); if (h_bufobj->buf != NULL && DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h_bufobj, byte_off + elem_size)) { data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf) + h_bufobj->offset + byte_off; duk_hbufobj_push_validated_read(thr, h_bufobj, data, elem_size); } else { DUK_D(DUK_DPRINT("bufobj access out of underlying buffer, ignoring (read zero)")); duk_push_uint(thr, 0); } return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) DUK_LOCAL duk_bool_t duk__putprop_fastpath_bufobj_tval(duk_hthread *thr, duk_hobject *obj, duk_tval *tv_key, duk_tval *tv_val) { duk_uint32_t idx; duk_hbufobj *h_bufobj; duk_uint_t byte_off; duk_small_uint_t elem_size; duk_uint8_t *data; if (!(DUK_HOBJECT_IS_BUFOBJ(obj) && DUK_TVAL_IS_NUMBER(tv_val))) { return 0; } DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)); /* caller ensures; rom objects are never bufobjs now */ h_bufobj = (duk_hbufobj *) obj; if (!DUK_HBUFOBJ_HAS_VIRTUAL_INDICES(h_bufobj)) { return 0; } #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_key)) { idx = duk__tval_fastint_to_arr_idx(tv_key); } else #endif if (DUK_TVAL_IS_DOUBLE(tv_key)) { idx = duk__tval_number_to_arr_idx(tv_key); } else { return 0; } /* If index is not valid, idx will be DUK__NO_ARRAY_INDEX which * is 0xffffffffUL. We don't need to check for that explicitly * because 0xffffffffUL will never be inside bufobj length. */ /* Careful with wrapping (left shifting idx would be unsafe). */ if (idx >= (h_bufobj->length >> h_bufobj->shift)) { return 0; } DUK_ASSERT(idx != DUK__NO_ARRAY_INDEX); byte_off = idx << h_bufobj->shift; /* no wrap assuming h_bufobj->length is valid */ elem_size = (duk_small_uint_t) (1U << h_bufobj->shift); /* Value is required to be a number in the fast path so there * are no side effects in write coercion. */ duk_push_tval(thr, tv_val); DUK_ASSERT(duk_is_number(thr, -1)); if (h_bufobj->buf != NULL && DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h_bufobj, byte_off + elem_size)) { data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf) + h_bufobj->offset + byte_off; duk_hbufobj_validated_write(thr, h_bufobj, data, elem_size); } else { DUK_D(DUK_DPRINT("bufobj access out of underlying buffer, ignoring (write skipped)")); } duk_pop_unsafe(thr); return 1; } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ /* * GETPROP: ECMAScript property read. */ DUK_INTERNAL duk_bool_t duk_hobject_getprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key) { duk_tval tv_obj_copy; duk_tval tv_key_copy; duk_hobject *curr = NULL; duk_hstring *key = NULL; duk_uint32_t arr_idx = DUK__NO_ARRAY_INDEX; duk_propdesc desc; duk_uint_t sanity; DUK_DDD(DUK_DDDPRINT("getprop: thr=%p, obj=%p, key=%p (obj -> %!T, key -> %!T)", (void *) thr, (void *) tv_obj, (void *) tv_key, (duk_tval *) tv_obj, (duk_tval *) tv_key)); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(tv_obj != NULL); DUK_ASSERT(tv_key != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_STATS_INC(thr->heap, stats_getprop_all); /* * Make a copy of tv_obj, tv_key, and tv_val to avoid any issues of * them being invalidated by a valstack resize. * * XXX: this is now an overkill for many fast paths. Rework this * to be faster (although switching to a valstack discipline might * be a better solution overall). */ DUK_TVAL_SET_TVAL(&tv_obj_copy, tv_obj); DUK_TVAL_SET_TVAL(&tv_key_copy, tv_key); tv_obj = &tv_obj_copy; tv_key = &tv_key_copy; /* * Coercion and fast path processing */ switch (DUK_TVAL_GET_TAG(tv_obj)) { case DUK_TAG_UNDEFINED: case DUK_TAG_NULL: { /* Note: unconditional throw */ DUK_DDD(DUK_DDDPRINT("base object is undefined or null -> reject")); #if defined(DUK_USE_PARANOID_ERRORS) DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE); #else DUK_ERROR_FMT2(thr, DUK_ERR_TYPE_ERROR, "cannot read property %s of %s", duk_push_string_tval_readable(thr, tv_key), duk_push_string_tval_readable(thr, tv_obj)); #endif DUK_WO_NORETURN(return 0;); break; } case DUK_TAG_BOOLEAN: { DUK_DDD(DUK_DDDPRINT("base object is a boolean, start lookup from boolean prototype")); curr = thr->builtins[DUK_BIDX_BOOLEAN_PROTOTYPE]; break; } case DUK_TAG_STRING: { duk_hstring *h = DUK_TVAL_GET_STRING(tv_obj); duk_int_t pop_count; if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { /* Symbols (ES2015 or hidden) don't have virtual properties. */ DUK_DDD(DUK_DDDPRINT("base object is a symbol, start lookup from symbol prototype")); curr = thr->builtins[DUK_BIDX_SYMBOL_PROTOTYPE]; break; } #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_key)) { arr_idx = duk__tval_fastint_to_arr_idx(tv_key); DUK_DDD(DUK_DDDPRINT("base object string, key is a fast-path fastint; arr_idx %ld", (long) arr_idx)); pop_count = 0; } else #endif if (DUK_TVAL_IS_NUMBER(tv_key)) { arr_idx = duk__tval_number_to_arr_idx(tv_key); DUK_DDD(DUK_DDDPRINT("base object string, key is a fast-path number; arr_idx %ld", (long) arr_idx)); pop_count = 0; } else { arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); DUK_DDD(DUK_DDDPRINT("base object string, key is a non-fast-path number; after " "coercion key is %!T, arr_idx %ld", (duk_tval *) duk_get_tval(thr, -1), (long) arr_idx)); pop_count = 1; } if (arr_idx != DUK__NO_ARRAY_INDEX && arr_idx < DUK_HSTRING_GET_CHARLEN(h)) { duk_pop_n_unsafe(thr, pop_count); duk_push_hstring(thr, h); duk_substring(thr, -1, arr_idx, arr_idx + 1); /* [str] -> [substr] */ DUK_STATS_INC(thr->heap, stats_getprop_stringidx); DUK_DDD(DUK_DDDPRINT("-> %!T (base is string, key is an index inside string length " "after coercion -> return char)", (duk_tval *) duk_get_tval(thr, -1))); return 1; } if (pop_count == 0) { /* This is a pretty awkward control flow, but we need to recheck the * key coercion here. */ arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); DUK_DDD(DUK_DDDPRINT("base object string, key is a non-fast-path number; after " "coercion key is %!T, arr_idx %ld", (duk_tval *) duk_get_tval(thr, -1), (long) arr_idx)); } if (key == DUK_HTHREAD_STRING_LENGTH(thr)) { duk_pop_unsafe(thr); /* [key] -> [] */ duk_push_uint(thr, (duk_uint_t) DUK_HSTRING_GET_CHARLEN(h)); /* [] -> [res] */ DUK_STATS_INC(thr->heap, stats_getprop_stringlen); DUK_DDD(DUK_DDDPRINT("-> %!T (base is string, key is 'length' after coercion -> " "return string length)", (duk_tval *) duk_get_tval(thr, -1))); return 1; } DUK_DDD(DUK_DDDPRINT("base object is a string, start lookup from string prototype")); curr = thr->builtins[DUK_BIDX_STRING_PROTOTYPE]; goto lookup; /* avoid double coercion */ } case DUK_TAG_OBJECT: { #if defined(DUK_USE_ARRAY_PROP_FASTPATH) duk_tval *tmp; #endif curr = DUK_TVAL_GET_OBJECT(tv_obj); DUK_ASSERT(curr != NULL); /* XXX: array .length fast path (important in e.g. loops)? */ #if defined(DUK_USE_ARRAY_PROP_FASTPATH) tmp = duk__getprop_shallow_fastpath_array_tval(thr, curr, tv_key); if (tmp) { duk_push_tval(thr, tmp); DUK_DDD(DUK_DDDPRINT("-> %!T (base is object, key is a number, array part " "fast path)", (duk_tval *) duk_get_tval(thr, -1))); DUK_STATS_INC(thr->heap, stats_getprop_arrayidx); return 1; } #endif #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) if (duk__getprop_fastpath_bufobj_tval(thr, curr, tv_key) != 0) { /* Read value pushed on stack. */ DUK_DDD(DUK_DDDPRINT("-> %!T (base is bufobj, key is a number, bufobj " "fast path)", (duk_tval *) duk_get_tval(thr, -1))); DUK_STATS_INC(thr->heap, stats_getprop_bufobjidx); return 1; } #endif #if defined(DUK_USE_ES6_PROXY) if (DUK_UNLIKELY(DUK_HOBJECT_IS_PROXY(curr))) { duk_hobject *h_target; if (duk__proxy_check_prop(thr, curr, DUK_STRIDX_GET, tv_key, &h_target)) { /* -> [ ... trap handler ] */ DUK_DDD(DUK_DDDPRINT("-> proxy object 'get' for key %!T", (duk_tval *) tv_key)); DUK_STATS_INC(thr->heap, stats_getprop_proxy); duk_push_hobject(thr, h_target); /* target */ duk_push_tval(thr, tv_key); /* P */ duk_push_tval(thr, tv_obj); /* Receiver: Proxy object */ duk_call_method(thr, 3 /*nargs*/); /* Target object must be checked for a conflicting * non-configurable property. */ arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); if (duk__get_own_propdesc_raw(thr, h_target, key, arr_idx, &desc, DUK_GETDESC_FLAG_PUSH_VALUE)) { duk_tval *tv_hook = duk_require_tval(thr, -3); /* value from hook */ duk_tval *tv_targ = duk_require_tval(thr, -1); /* value from target */ duk_bool_t datadesc_reject; duk_bool_t accdesc_reject; DUK_DDD(DUK_DDDPRINT("proxy 'get': target has matching property %!O, check for " "conflicting property; tv_hook=%!T, tv_targ=%!T, desc.flags=0x%08lx, " "desc.get=%p, desc.set=%p", (duk_heaphdr *) key, (duk_tval *) tv_hook, (duk_tval *) tv_targ, (unsigned long) desc.flags, (void *) desc.get, (void *) desc.set)); datadesc_reject = !(desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) && !(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !(desc.flags & DUK_PROPDESC_FLAG_WRITABLE) && !duk_js_samevalue(tv_hook, tv_targ); accdesc_reject = (desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) && !(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && (desc.get == NULL) && !DUK_TVAL_IS_UNDEFINED(tv_hook); if (datadesc_reject || accdesc_reject) { DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED); DUK_WO_NORETURN(return 0;); } duk_pop_2_unsafe(thr); } else { duk_pop_unsafe(thr); } return 1; /* return value */ } curr = h_target; /* resume lookup from target */ DUK_TVAL_SET_OBJECT(tv_obj, curr); } #endif /* DUK_USE_ES6_PROXY */ if (DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(curr)) { arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); DUK_STATS_INC(thr->heap, stats_getprop_arguments); if (duk__check_arguments_map_for_get(thr, curr, key, &desc)) { DUK_DDD(DUK_DDDPRINT("-> %!T (base is object with arguments exotic behavior, " "key matches magically bound property -> skip standard " "Get with replacement value)", (duk_tval *) duk_get_tval(thr, -1))); /* no need for 'caller' post-check, because 'key' must be an array index */ duk_remove_m2(thr); /* [key result] -> [result] */ return 1; } goto lookup; /* avoid double coercion */ } break; } /* Buffer has virtual properties similar to string, but indexed values * are numbers, not 1-byte buffers/strings which would perform badly. */ case DUK_TAG_BUFFER: { duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv_obj); duk_int_t pop_count; /* * Because buffer values are often looped over, a number fast path * is important. */ #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_key)) { arr_idx = duk__tval_fastint_to_arr_idx(tv_key); DUK_DDD(DUK_DDDPRINT("base object buffer, key is a fast-path fastint; arr_idx %ld", (long) arr_idx)); pop_count = 0; } else #endif if (DUK_TVAL_IS_NUMBER(tv_key)) { arr_idx = duk__tval_number_to_arr_idx(tv_key); DUK_DDD(DUK_DDDPRINT("base object buffer, key is a fast-path number; arr_idx %ld", (long) arr_idx)); pop_count = 0; } else { arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); DUK_DDD(DUK_DDDPRINT("base object buffer, key is a non-fast-path number; after " "coercion key is %!T, arr_idx %ld", (duk_tval *) duk_get_tval(thr, -1), (long) arr_idx)); pop_count = 1; } if (arr_idx != DUK__NO_ARRAY_INDEX && arr_idx < DUK_HBUFFER_GET_SIZE(h)) { duk_pop_n_unsafe(thr, pop_count); duk_push_uint(thr, ((duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h))[arr_idx]); DUK_STATS_INC(thr->heap, stats_getprop_bufferidx); DUK_DDD(DUK_DDDPRINT("-> %!T (base is buffer, key is an index inside buffer length " "after coercion -> return byte as number)", (duk_tval *) duk_get_tval(thr, -1))); return 1; } if (pop_count == 0) { /* This is a pretty awkward control flow, but we need to recheck the * key coercion here. */ arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); DUK_DDD(DUK_DDDPRINT("base object buffer, key is a non-fast-path number; after " "coercion key is %!T, arr_idx %ld", (duk_tval *) duk_get_tval(thr, -1), (long) arr_idx)); } if (key == DUK_HTHREAD_STRING_LENGTH(thr)) { duk_pop_unsafe(thr); /* [key] -> [] */ duk_push_uint(thr, (duk_uint_t) DUK_HBUFFER_GET_SIZE(h)); /* [] -> [res] */ DUK_STATS_INC(thr->heap, stats_getprop_bufferlen); DUK_DDD(DUK_DDDPRINT("-> %!T (base is buffer, key is 'length' " "after coercion -> return buffer length)", (duk_tval *) duk_get_tval(thr, -1))); return 1; } DUK_DDD(DUK_DDDPRINT("base object is a buffer, start lookup from Uint8Array prototype")); curr = thr->builtins[DUK_BIDX_UINT8ARRAY_PROTOTYPE]; goto lookup; /* avoid double coercion */ } case DUK_TAG_POINTER: { DUK_DDD(DUK_DDDPRINT("base object is a pointer, start lookup from pointer prototype")); curr = thr->builtins[DUK_BIDX_POINTER_PROTOTYPE]; break; } case DUK_TAG_LIGHTFUNC: { /* Lightfuncs inherit getter .name and .length from %NativeFunctionPrototype%. */ DUK_DDD(DUK_DDDPRINT("base object is a lightfunc, start lookup from function prototype")); curr = thr->builtins[DUK_BIDX_NATIVE_FUNCTION_PROTOTYPE]; break; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: { /* number */ DUK_DDD(DUK_DDDPRINT("base object is a number, start lookup from number prototype")); DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_obj)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_obj)); curr = thr->builtins[DUK_BIDX_NUMBER_PROTOTYPE]; break; } } /* key coercion (unless already coerced above) */ DUK_ASSERT(key == NULL); arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); /* * Property lookup */ lookup: /* [key] (coerced) */ DUK_ASSERT(curr != NULL); DUK_ASSERT(key != NULL); sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY; do { if (!duk__get_own_propdesc_raw(thr, curr, key, arr_idx, &desc, DUK_GETDESC_FLAG_PUSH_VALUE)) { goto next_in_chain; } if (desc.get != NULL) { /* accessor with defined getter */ DUK_ASSERT((desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) != 0); duk_pop_unsafe(thr); /* [key undefined] -> [key] */ duk_push_hobject(thr, desc.get); duk_push_tval(thr, tv_obj); /* note: original, uncoerced base */ #if defined(DUK_USE_NONSTD_GETTER_KEY_ARGUMENT) duk_dup_m3(thr); duk_call_method(thr, 1); /* [key getter this key] -> [key retval] */ #else duk_call_method(thr, 0); /* [key getter this] -> [key retval] */ #endif } else { /* [key value] or [key undefined] */ /* data property or accessor without getter */ DUK_ASSERT(((desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) == 0) || (desc.get == NULL)); /* if accessor without getter, return value is undefined */ DUK_ASSERT(((desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) == 0) || duk_is_undefined(thr, -1)); /* Note: for an accessor without getter, falling through to * check for "caller" exotic behavior is unnecessary as * "undefined" will never activate the behavior. But it does * no harm, so we'll do it anyway. */ } goto found; /* [key result] */ next_in_chain: /* XXX: option to pretend property doesn't exist if sanity limit is * hit might be useful. */ if (DUK_UNLIKELY(sanity-- == 0)) { DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT); DUK_WO_NORETURN(return 0;); } curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, curr); } while (curr != NULL); /* * Not found */ duk_to_undefined(thr, -1); /* [key] -> [undefined] (default value) */ DUK_DDD(DUK_DDDPRINT("-> %!T (not found)", (duk_tval *) duk_get_tval(thr, -1))); return 0; /* * Found; post-processing (Function and arguments objects) */ found: /* [key result] */ #if !defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) /* Special behavior for 'caller' property of (non-bound) function objects * and non-strict Arguments objects: if 'caller' -value- (!) is a strict * mode function, throw a TypeError (E5 Sections 15.3.5.4, 10.6). * Quite interestingly, a non-strict function with no formal arguments * will get an arguments object -without- special 'caller' behavior! * * The E5.1 spec is a bit ambiguous if this special behavior applies when * a bound function is the base value (not the 'caller' value): Section * 15.3.4.5 (describing bind()) states that [[Get]] for bound functions * matches that of Section 15.3.5.4 ([[Get]] for Function instances). * However, Section 13.3.5.4 has "NOTE: Function objects created using * Function.prototype.bind use the default [[Get]] internal method." * The current implementation assumes this means that bound functions * should not have the special [[Get]] behavior. * * The E5.1 spec is also a bit unclear if the TypeError throwing is * applied if the 'caller' value is a strict bound function. The * current implementation will throw even for both strict non-bound * and strict bound functions. * * See test-dev-strict-func-as-caller-prop-value.js for quite extensive * tests. * * This exotic behavior is disabled when the non-standard 'caller' property * is enabled, as it conflicts with the free use of 'caller'. */ if (key == DUK_HTHREAD_STRING_CALLER(thr) && DUK_TVAL_IS_OBJECT(tv_obj)) { duk_hobject *orig = DUK_TVAL_GET_OBJECT(tv_obj); DUK_ASSERT(orig != NULL); if (DUK_HOBJECT_IS_NONBOUND_FUNCTION(orig) || DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(orig)) { duk_hobject *h; /* XXX: The TypeError is currently not applied to bound * functions because the 'strict' flag is not copied by * bind(). This may or may not be correct, the specification * only refers to the value being a "strict mode Function * object" which is ambiguous. */ DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(orig)); h = duk_get_hobject(thr, -1); /* NULL if not an object */ if (h && DUK_HOBJECT_IS_FUNCTION(h) && DUK_HOBJECT_HAS_STRICT(h)) { /* XXX: sufficient to check 'strict', assert for 'is function' */ DUK_ERROR_TYPE(thr, DUK_STR_STRICT_CALLER_READ); DUK_WO_NORETURN(return 0;); } } } #endif /* !DUK_USE_NONSTD_FUNC_CALLER_PROPERTY */ duk_remove_m2(thr); /* [key result] -> [result] */ DUK_DDD(DUK_DDDPRINT("-> %!T (found)", (duk_tval *) duk_get_tval(thr, -1))); return 1; } /* * HASPROP: ECMAScript property existence check ("in" operator). * * Interestingly, the 'in' operator does not do any coercion of * the target object. */ DUK_INTERNAL duk_bool_t duk_hobject_hasprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key) { duk_tval tv_key_copy; duk_hobject *obj; duk_hstring *key; duk_uint32_t arr_idx; duk_bool_t rc; duk_propdesc desc; DUK_DDD(DUK_DDDPRINT("hasprop: thr=%p, obj=%p, key=%p (obj -> %!T, key -> %!T)", (void *) thr, (void *) tv_obj, (void *) tv_key, (duk_tval *) tv_obj, (duk_tval *) tv_key)); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(tv_obj != NULL); DUK_ASSERT(tv_key != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_TVAL_SET_TVAL(&tv_key_copy, tv_key); tv_key = &tv_key_copy; /* * The 'in' operator requires an object as its right hand side, * throwing a TypeError unconditionally if this is not the case. * * However, lightfuncs need to behave like fully fledged objects * here to be maximally transparent, so we need to handle them * here. Same goes for plain buffers which behave like ArrayBuffers. */ /* XXX: Refactor key coercion so that it's only called once. It can't * be trivially lifted here because the object must be type checked * first. */ if (DUK_TVAL_IS_OBJECT(tv_obj)) { obj = DUK_TVAL_GET_OBJECT(tv_obj); DUK_ASSERT(obj != NULL); arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); } else if (DUK_TVAL_IS_BUFFER(tv_obj)) { arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); if (duk__key_is_plain_buf_ownprop(thr, DUK_TVAL_GET_BUFFER(tv_obj), key, arr_idx)) { rc = 1; goto pop_and_return; } obj = thr->builtins[DUK_BIDX_UINT8ARRAY_PROTOTYPE]; } else if (DUK_TVAL_IS_LIGHTFUNC(tv_obj)) { arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); /* If not found, resume existence check from %NativeFunctionPrototype%. * We can just substitute the value in this case; nothing will * need the original base value (as would be the case with e.g. * setters/getters. */ obj = thr->builtins[DUK_BIDX_NATIVE_FUNCTION_PROTOTYPE]; } else { /* Note: unconditional throw */ DUK_DDD(DUK_DDDPRINT("base object is not an object -> reject")); DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE); DUK_WO_NORETURN(return 0;); } /* XXX: fast path for arrays? */ DUK_ASSERT(key != NULL); DUK_ASSERT(obj != NULL); DUK_UNREF(arr_idx); #if defined(DUK_USE_ES6_PROXY) if (DUK_UNLIKELY(DUK_HOBJECT_IS_PROXY(obj))) { duk_hobject *h_target; duk_bool_t tmp_bool; /* XXX: the key in 'key in obj' is string coerced before we're called * (which is the required behavior in E5/E5.1/E6) so the key is a string * here already. */ if (duk__proxy_check_prop(thr, obj, DUK_STRIDX_HAS, tv_key, &h_target)) { /* [ ... key trap handler ] */ DUK_DDD(DUK_DDDPRINT("-> proxy object 'has' for key %!T", (duk_tval *) tv_key)); duk_push_hobject(thr, h_target); /* target */ duk_push_tval(thr, tv_key); /* P */ duk_call_method(thr, 2 /*nargs*/); tmp_bool = duk_to_boolean_top_pop(thr); if (!tmp_bool) { /* Target object must be checked for a conflicting * non-configurable property. */ if (duk__get_own_propdesc_raw(thr, h_target, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */ DUK_DDD(DUK_DDDPRINT("proxy 'has': target has matching property %!O, check for " "conflicting property; desc.flags=0x%08lx, " "desc.get=%p, desc.set=%p", (duk_heaphdr *) key, (unsigned long) desc.flags, (void *) desc.get, (void *) desc.set)); /* XXX: Extensibility check for target uses IsExtensible(). If we * implemented the isExtensible trap and didn't reject proxies as * proxy targets, it should be respected here. */ if (!((desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && /* property is configurable and */ DUK_HOBJECT_HAS_EXTENSIBLE(h_target))) { /* ... target is extensible */ DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED); DUK_WO_NORETURN(return 0;); } } } duk_pop_unsafe(thr); /* [ key ] -> [] */ return tmp_bool; } obj = h_target; /* resume check from proxy target */ } #endif /* DUK_USE_ES6_PROXY */ /* XXX: inline into a prototype walking loop? */ rc = duk__get_propdesc(thr, obj, key, &desc, 0 /*flags*/); /* don't push value */ /* fall through */ pop_and_return: duk_pop_unsafe(thr); /* [ key ] -> [] */ return rc; } /* * HASPROP variant used internally. * * This primitive must never throw an error, callers rely on this. * In particular, don't throw an error for prototype loops; instead, * pretend like the property doesn't exist if a prototype sanity limit * is reached. * * Does not implement proxy behavior: if applied to a proxy object, * returns key existence on the proxy object itself. */ DUK_INTERNAL duk_bool_t duk_hobject_hasprop_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key) { duk_propdesc dummy; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); return duk__get_propdesc(thr, obj, key, &dummy, DUK_GETDESC_FLAG_IGNORE_PROTOLOOP); /* don't push value */ } /* * Helper: handle Array object 'length' write which automatically * deletes properties, see E5 Section 15.4.5.1, step 3. This is * quite tricky to get right. * * Used by duk_hobject_putprop(). */ /* Coerce a new .length candidate to a number and check that it's a valid * .length. */ DUK_LOCAL duk_uint32_t duk__to_new_array_length_checked(duk_hthread *thr, duk_tval *tv) { duk_uint32_t res; duk_double_t d; #if !defined(DUK_USE_PREFER_SIZE) #if defined(DUK_USE_FASTINT) /* When fastints are enabled, the most interesting case is assigning * a fastint to .length (e.g. arr.length = 0). */ if (DUK_TVAL_IS_FASTINT(tv)) { /* Very common case. */ duk_int64_t fi; fi = DUK_TVAL_GET_FASTINT(tv); if (fi < 0 || fi > DUK_I64_CONSTANT(0xffffffff)) { goto fail_range; } return (duk_uint32_t) fi; } #else /* DUK_USE_FASTINT */ /* When fastints are not enabled, the most interesting case is any * number. */ if (DUK_TVAL_IS_DOUBLE(tv)) { d = DUK_TVAL_GET_NUMBER(tv); } #endif /* DUK_USE_FASTINT */ else #endif /* !DUK_USE_PREFER_SIZE */ { /* In all other cases, and when doing a size optimized build, * fall back to the comprehensive handler. */ d = duk_js_tonumber(thr, tv); } /* Refuse to update an Array's 'length' to a value outside the * 32-bit range. Negative zero is accepted as zero. */ res = duk_double_to_uint32_t(d); if ((duk_double_t) res != d) { goto fail_range; } return res; fail_range: DUK_ERROR_RANGE(thr, DUK_STR_INVALID_ARRAY_LENGTH); DUK_WO_NORETURN(return 0;); } /* Delete elements required by a smaller length, taking into account * potentially non-configurable elements. Returns non-zero if all * elements could be deleted, and zero if all or some elements could * not be deleted. Also writes final "target length" to 'out_result_len'. * This is the length value that should go into the 'length' property * (must be set by the caller). Never throws an error. */ DUK_LOCAL duk_bool_t duk__handle_put_array_length_smaller(duk_hthread *thr, duk_hobject *obj, duk_uint32_t old_len, duk_uint32_t new_len, duk_bool_t force_flag, duk_uint32_t *out_result_len) { duk_uint32_t target_len; duk_uint_fast32_t i; duk_uint32_t arr_idx; duk_hstring *key; duk_tval *tv; duk_bool_t rc; DUK_DDD(DUK_DDDPRINT("new array length smaller than old (%ld -> %ld), " "probably need to remove elements", (long) old_len, (long) new_len)); /* * New length is smaller than old length, need to delete properties above * the new length. * * If array part exists, this is straightforward: array entries cannot * be non-configurable so this is guaranteed to work. * * If array part does not exist, array-indexed values are scattered * in the entry part, and some may not be configurable (preventing length * from becoming lower than their index + 1). To handle the algorithm * in E5 Section 15.4.5.1, step l correctly, we scan the entire property * set twice. */ DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(new_len < old_len); DUK_ASSERT(out_result_len != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_ASSERT(DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)); DUK_ASSERT(DUK_HOBJECT_IS_ARRAY(obj)); if (DUK_HOBJECT_HAS_ARRAY_PART(obj)) { /* * All defined array-indexed properties are in the array part * (we assume the array part is comprehensive), and all array * entries are writable, configurable, and enumerable. Thus, * nothing can prevent array entries from being deleted. */ DUK_DDD(DUK_DDDPRINT("have array part, easy case")); if (old_len < DUK_HOBJECT_GET_ASIZE(obj)) { /* XXX: assertion that entries >= old_len are already unused */ i = old_len; } else { i = DUK_HOBJECT_GET_ASIZE(obj); } DUK_ASSERT(i <= DUK_HOBJECT_GET_ASIZE(obj)); while (i > new_len) { i--; tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, i); DUK_TVAL_SET_UNUSED_UPDREF(thr, tv); /* side effects */ } *out_result_len = new_len; return 1; } else { /* * Entries part is a bit more complex. */ /* Stage 1: find highest preventing non-configurable entry (if any). * When forcing, ignore non-configurability. */ DUK_DDD(DUK_DDDPRINT("no array part, slow case")); DUK_DDD(DUK_DDDPRINT("array length write, no array part, stage 1: find target_len " "(highest preventing non-configurable entry (if any))")); target_len = new_len; if (force_flag) { DUK_DDD(DUK_DDDPRINT("array length write, no array part; force flag -> skip stage 1")); goto skip_stage1; } for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) { key = DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i); if (!key) { DUK_DDD(DUK_DDDPRINT("skip entry index %ld: null key", (long) i)); continue; } if (!DUK_HSTRING_HAS_ARRIDX(key)) { DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key not an array index", (long) i)); continue; } DUK_ASSERT(DUK_HSTRING_HAS_ARRIDX(key)); /* XXX: macro checks for array index flag, which is unnecessary here */ arr_idx = DUK_HSTRING_GET_ARRIDX_SLOW(key); DUK_ASSERT(arr_idx != DUK__NO_ARRAY_INDEX); DUK_ASSERT(arr_idx < old_len); /* consistency requires this */ if (arr_idx < new_len) { DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key is array index %ld, below new_len", (long) i, (long) arr_idx)); continue; } if (DUK_HOBJECT_E_SLOT_IS_CONFIGURABLE(thr->heap, obj, i)) { DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key is a relevant array index %ld, but configurable", (long) i, (long) arr_idx)); continue; } /* relevant array index is non-configurable, blocks write */ if (arr_idx >= target_len) { DUK_DDD(DUK_DDDPRINT("entry at index %ld has arr_idx %ld, is not configurable, " "update target_len %ld -> %ld", (long) i, (long) arr_idx, (long) target_len, (long) (arr_idx + 1))); target_len = arr_idx + 1; } } skip_stage1: /* stage 2: delete configurable entries above target length */ DUK_DDD(DUK_DDDPRINT("old_len=%ld, new_len=%ld, target_len=%ld", (long) old_len, (long) new_len, (long) target_len)); DUK_DDD(DUK_DDDPRINT("array length write, no array part, stage 2: remove " "entries >= target_len")); for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) { key = DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i); if (!key) { DUK_DDD(DUK_DDDPRINT("skip entry index %ld: null key", (long) i)); continue; } if (!DUK_HSTRING_HAS_ARRIDX(key)) { DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key not an array index", (long) i)); continue; } DUK_ASSERT(DUK_HSTRING_HAS_ARRIDX(key)); /* XXX: macro checks for array index flag, which is unnecessary here */ arr_idx = DUK_HSTRING_GET_ARRIDX_SLOW(key); DUK_ASSERT(arr_idx != DUK__NO_ARRAY_INDEX); DUK_ASSERT(arr_idx < old_len); /* consistency requires this */ if (arr_idx < target_len) { DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key is array index %ld, below target_len", (long) i, (long) arr_idx)); continue; } DUK_ASSERT(force_flag || DUK_HOBJECT_E_SLOT_IS_CONFIGURABLE(thr->heap, obj, i)); /* stage 1 guarantees */ DUK_DDD(DUK_DDDPRINT("delete entry index %ld: key is array index %ld", (long) i, (long) arr_idx)); /* * Slow delete, but we don't care as we're already in a very slow path. * The delete always succeeds: key has no exotic behavior, property * is configurable, and no resize occurs. */ rc = duk_hobject_delprop_raw(thr, obj, key, force_flag ? DUK_DELPROP_FLAG_FORCE : 0); DUK_UNREF(rc); DUK_ASSERT(rc != 0); } /* stage 3: update length (done by caller), decide return code */ DUK_DDD(DUK_DDDPRINT("array length write, no array part, stage 3: update length (done by caller)")); *out_result_len = target_len; if (target_len == new_len) { DUK_DDD(DUK_DDDPRINT("target_len matches new_len, return success")); return 1; } DUK_DDD(DUK_DDDPRINT("target_len does not match new_len (some entry prevented " "full length adjustment), return error")); return 0; } DUK_UNREACHABLE(); } /* XXX: is valstack top best place for argument? */ DUK_LOCAL duk_bool_t duk__handle_put_array_length(duk_hthread *thr, duk_hobject *obj) { duk_harray *a; duk_uint32_t old_len; duk_uint32_t new_len; duk_uint32_t result_len; duk_bool_t rc; DUK_DDD(DUK_DDDPRINT("handling a put operation to array 'length' exotic property, " "new val: %!T", (duk_tval *) duk_get_tval(thr, -1))); DUK_ASSERT(thr != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_ASSERT(DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)); DUK_ASSERT(DUK_HOBJECT_IS_ARRAY(obj)); a = (duk_harray *) obj; DUK_HARRAY_ASSERT_VALID(a); DUK_ASSERT(duk_is_valid_index(thr, -1)); /* * Get old and new length */ old_len = a->length; new_len = duk__to_new_array_length_checked(thr, DUK_GET_TVAL_NEGIDX(thr, -1)); DUK_DDD(DUK_DDDPRINT("old_len=%ld, new_len=%ld", (long) old_len, (long) new_len)); /* * Writability check */ if (DUK_HARRAY_LENGTH_NONWRITABLE(a)) { DUK_DDD(DUK_DDDPRINT("length is not writable, fail")); return 0; } /* * New length not lower than old length => no changes needed * (not even array allocation). */ if (new_len >= old_len) { DUK_DDD(DUK_DDDPRINT("new length is same or higher than old length, just update length, no deletions")); a->length = new_len; return 1; } DUK_DDD(DUK_DDDPRINT("new length is lower than old length, probably must delete entries")); /* * New length lower than old length => delete elements, then * update length. * * Note: even though a bunch of elements have been deleted, the 'desc' is * still valid as properties haven't been resized (and entries compacted). */ rc = duk__handle_put_array_length_smaller(thr, obj, old_len, new_len, 0 /*force_flag*/, &result_len); DUK_ASSERT(result_len >= new_len && result_len <= old_len); a->length = result_len; /* XXX: shrink array allocation or entries compaction here? */ return rc; } /* * PUTPROP: ECMAScript property write. * * Unlike ECMAScript primitive which returns nothing, returns 1 to indicate * success and 0 to indicate failure (assuming throw is not set). * * This is an extremely tricky function. Some examples: * * * Currently a decref may trigger a GC, which may compact an object's * property allocation. Consequently, any entry indices (e_idx) will * be potentially invalidated by a decref. * * * Exotic behaviors (strings, arrays, arguments object) require, * among other things: * * - Preprocessing before and postprocessing after an actual property * write. For example, array index write requires pre-checking the * array 'length' property for access control, and may require an * array 'length' update after the actual write has succeeded (but * not if it fails). * * - Deletion of multiple entries, as a result of array 'length' write. * * * Input values are taken as pointers which may point to the valstack. * If valstack is resized because of the put (this may happen at least * when the array part is abandoned), the pointers can be invalidated. * (We currently make a copy of all of the input values to avoid issues.) */ DUK_INTERNAL duk_bool_t duk_hobject_putprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key, duk_tval *tv_val, duk_bool_t throw_flag) { duk_tval tv_obj_copy; duk_tval tv_key_copy; duk_tval tv_val_copy; duk_hobject *orig = NULL; /* NULL if tv_obj is primitive */ duk_hobject *curr; duk_hstring *key = NULL; duk_propdesc desc; duk_tval *tv; duk_uint32_t arr_idx; duk_bool_t rc; duk_int_t e_idx; duk_uint_t sanity; duk_uint32_t new_array_length = 0; /* 0 = no update */ DUK_DDD(DUK_DDDPRINT("putprop: thr=%p, obj=%p, key=%p, val=%p, throw=%ld " "(obj -> %!T, key -> %!T, val -> %!T)", (void *) thr, (void *) tv_obj, (void *) tv_key, (void *) tv_val, (long) throw_flag, (duk_tval *) tv_obj, (duk_tval *) tv_key, (duk_tval *) tv_val)); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(tv_obj != NULL); DUK_ASSERT(tv_key != NULL); DUK_ASSERT(tv_val != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_STATS_INC(thr->heap, stats_putprop_all); /* * Make a copy of tv_obj, tv_key, and tv_val to avoid any issues of * them being invalidated by a valstack resize. * * XXX: this is an overkill for some paths, so optimize this later * (or maybe switch to a stack arguments model entirely). */ DUK_TVAL_SET_TVAL(&tv_obj_copy, tv_obj); DUK_TVAL_SET_TVAL(&tv_key_copy, tv_key); DUK_TVAL_SET_TVAL(&tv_val_copy, tv_val); tv_obj = &tv_obj_copy; tv_key = &tv_key_copy; tv_val = &tv_val_copy; /* * Coercion and fast path processing. */ switch (DUK_TVAL_GET_TAG(tv_obj)) { case DUK_TAG_UNDEFINED: case DUK_TAG_NULL: { /* Note: unconditional throw */ DUK_DDD(DUK_DDDPRINT("base object is undefined or null -> reject (object=%!iT)", (duk_tval *) tv_obj)); #if defined(DUK_USE_PARANOID_ERRORS) DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE); #else DUK_ERROR_FMT2(thr, DUK_ERR_TYPE_ERROR, "cannot write property %s of %s", duk_push_string_tval_readable(thr, tv_key), duk_push_string_tval_readable(thr, tv_obj)); #endif DUK_WO_NORETURN(return 0;); break; } case DUK_TAG_BOOLEAN: { DUK_DDD(DUK_DDDPRINT("base object is a boolean, start lookup from boolean prototype")); curr = thr->builtins[DUK_BIDX_BOOLEAN_PROTOTYPE]; break; } case DUK_TAG_STRING: { duk_hstring *h = DUK_TVAL_GET_STRING(tv_obj); /* * Note: currently no fast path for array index writes. * They won't be possible anyway as strings are immutable. */ DUK_ASSERT(key == NULL); arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { /* Symbols (ES2015 or hidden) don't have virtual properties. */ curr = thr->builtins[DUK_BIDX_SYMBOL_PROTOTYPE]; goto lookup; } if (key == DUK_HTHREAD_STRING_LENGTH(thr)) { goto fail_not_writable; } if (arr_idx != DUK__NO_ARRAY_INDEX && arr_idx < DUK_HSTRING_GET_CHARLEN(h)) { goto fail_not_writable; } DUK_DDD(DUK_DDDPRINT("base object is a string, start lookup from string prototype")); curr = thr->builtins[DUK_BIDX_STRING_PROTOTYPE]; goto lookup; /* avoid double coercion */ } case DUK_TAG_OBJECT: { orig = DUK_TVAL_GET_OBJECT(tv_obj); DUK_ASSERT(orig != NULL); #if defined(DUK_USE_ROM_OBJECTS) /* With this check in place fast paths won't need read-only * object checks. This is technically incorrect if there are * setters that cause no writes to ROM objects, but current * built-ins don't have such setters. */ if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) orig)) { DUK_DD(DUK_DDPRINT("attempt to putprop on read-only target object")); goto fail_not_writable_no_pop; /* Must avoid duk_pop() in exit path */ } #endif /* The fast path for array property put is not fully compliant: * If one places conflicting number-indexed properties into * Array.prototype (for example, a non-writable Array.prototype[7]) * the fast path will incorrectly ignore them. * * This fast path could be made compliant by falling through * to the slow path if the previous value was UNUSED. This would * also remove the need to check for extensibility. Right now a * non-extensible array is slower than an extensible one as far * as writes are concerned. * * The fast path behavior is documented in more detail here: * tests/ecmascript/test-misc-array-fast-write.js */ /* XXX: array .length? */ #if defined(DUK_USE_ARRAY_PROP_FASTPATH) if (duk__putprop_shallow_fastpath_array_tval(thr, orig, tv_key, tv_val) != 0) { DUK_DDD(DUK_DDDPRINT("array fast path success")); DUK_STATS_INC(thr->heap, stats_putprop_arrayidx); return 1; } #endif #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) if (duk__putprop_fastpath_bufobj_tval(thr, orig, tv_key, tv_val) != 0) { DUK_DDD(DUK_DDDPRINT("base is bufobj, key is a number, bufobj fast path")); DUK_STATS_INC(thr->heap, stats_putprop_bufobjidx); return 1; } #endif #if defined(DUK_USE_ES6_PROXY) if (DUK_UNLIKELY(DUK_HOBJECT_IS_PROXY(orig))) { duk_hobject *h_target; duk_bool_t tmp_bool; if (duk__proxy_check_prop(thr, orig, DUK_STRIDX_SET, tv_key, &h_target)) { /* -> [ ... trap handler ] */ DUK_DDD(DUK_DDDPRINT("-> proxy object 'set' for key %!T", (duk_tval *) tv_key)); DUK_STATS_INC(thr->heap, stats_putprop_proxy); duk_push_hobject(thr, h_target); /* target */ duk_push_tval(thr, tv_key); /* P */ duk_push_tval(thr, tv_val); /* V */ duk_push_tval(thr, tv_obj); /* Receiver: Proxy object */ duk_call_method(thr, 4 /*nargs*/); tmp_bool = duk_to_boolean_top_pop(thr); if (!tmp_bool) { goto fail_proxy_rejected; } /* Target object must be checked for a conflicting * non-configurable property. */ arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); if (duk__get_own_propdesc_raw(thr, h_target, key, arr_idx, &desc, DUK_GETDESC_FLAG_PUSH_VALUE)) { duk_tval *tv_targ = duk_require_tval(thr, -1); duk_bool_t datadesc_reject; duk_bool_t accdesc_reject; DUK_DDD(DUK_DDDPRINT("proxy 'set': target has matching property %!O, check for " "conflicting property; tv_val=%!T, tv_targ=%!T, desc.flags=0x%08lx, " "desc.get=%p, desc.set=%p", (duk_heaphdr *) key, (duk_tval *) tv_val, (duk_tval *) tv_targ, (unsigned long) desc.flags, (void *) desc.get, (void *) desc.set)); datadesc_reject = !(desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) && !(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !(desc.flags & DUK_PROPDESC_FLAG_WRITABLE) && !duk_js_samevalue(tv_val, tv_targ); accdesc_reject = (desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) && !(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && (desc.set == NULL); if (datadesc_reject || accdesc_reject) { DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED); DUK_WO_NORETURN(return 0;); } duk_pop_2_unsafe(thr); } else { duk_pop_unsafe(thr); } return 1; /* success */ } orig = h_target; /* resume write to target */ DUK_TVAL_SET_OBJECT(tv_obj, orig); } #endif /* DUK_USE_ES6_PROXY */ curr = orig; break; } case DUK_TAG_BUFFER: { duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv_obj); duk_int_t pop_count = 0; /* * Because buffer values may be looped over and read/written * from, an array index fast path is important. */ #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_key)) { arr_idx = duk__tval_fastint_to_arr_idx(tv_key); DUK_DDD(DUK_DDDPRINT("base object buffer, key is a fast-path fastint; arr_idx %ld", (long) arr_idx)); pop_count = 0; } else #endif if (DUK_TVAL_IS_NUMBER(tv_key)) { arr_idx = duk__tval_number_to_arr_idx(tv_key); DUK_DDD(DUK_DDDPRINT("base object buffer, key is a fast-path number; arr_idx %ld", (long) arr_idx)); pop_count = 0; } else { arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); DUK_DDD(DUK_DDDPRINT("base object buffer, key is a non-fast-path number; after " "coercion key is %!T, arr_idx %ld", (duk_tval *) duk_get_tval(thr, -1), (long) arr_idx)); pop_count = 1; } if (arr_idx != DUK__NO_ARRAY_INDEX && arr_idx < DUK_HBUFFER_GET_SIZE(h)) { duk_uint8_t *data; DUK_DDD(DUK_DDDPRINT("writing to buffer data at index %ld", (long) arr_idx)); data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h); /* XXX: duk_to_int() ensures we'll get 8 lowest bits as * as input is within duk_int_t range (capped outside it). */ #if defined(DUK_USE_FASTINT) /* Buffer writes are often integers. */ if (DUK_TVAL_IS_FASTINT(tv_val)) { data[arr_idx] = (duk_uint8_t) DUK_TVAL_GET_FASTINT_U32(tv_val); } else #endif { duk_push_tval(thr, tv_val); data[arr_idx] = (duk_uint8_t) duk_to_uint32(thr, -1); pop_count++; } duk_pop_n_unsafe(thr, pop_count); DUK_DDD(DUK_DDDPRINT("result: success (buffer data write)")); DUK_STATS_INC(thr->heap, stats_putprop_bufferidx); return 1; } if (pop_count == 0) { /* This is a pretty awkward control flow, but we need to recheck the * key coercion here. */ arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); DUK_DDD(DUK_DDDPRINT("base object buffer, key is a non-fast-path number; after " "coercion key is %!T, arr_idx %ld", (duk_tval *) duk_get_tval(thr, -1), (long) arr_idx)); } if (key == DUK_HTHREAD_STRING_LENGTH(thr)) { goto fail_not_writable; } DUK_DDD(DUK_DDDPRINT("base object is a buffer, start lookup from Uint8Array prototype")); curr = thr->builtins[DUK_BIDX_UINT8ARRAY_PROTOTYPE]; goto lookup; /* avoid double coercion */ } case DUK_TAG_POINTER: { DUK_DDD(DUK_DDDPRINT("base object is a pointer, start lookup from pointer prototype")); curr = thr->builtins[DUK_BIDX_POINTER_PROTOTYPE]; break; } case DUK_TAG_LIGHTFUNC: { /* Lightfuncs have no own properties and are considered non-extensible. * However, the write may be captured by an inherited setter which * means we can't stop the lookup here. */ DUK_DDD(DUK_DDDPRINT("base object is a lightfunc, start lookup from function prototype")); curr = thr->builtins[DUK_BIDX_NATIVE_FUNCTION_PROTOTYPE]; break; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: { /* number */ DUK_DDD(DUK_DDDPRINT("base object is a number, start lookup from number prototype")); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_obj)); curr = thr->builtins[DUK_BIDX_NUMBER_PROTOTYPE]; break; } } DUK_ASSERT(key == NULL); arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); lookup: /* * Check whether the property already exists in the prototype chain. * Note that the actual write goes into the original base object * (except if an accessor property captures the write). */ /* [key] */ DUK_ASSERT(curr != NULL); sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY; do { if (!duk__get_own_propdesc_raw(thr, curr, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */ goto next_in_chain; } if (desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) { /* * Found existing accessor property (own or inherited). * Call setter with 'this' set to orig, and value as the only argument. * Setter calls are OK even for ROM objects. * * Note: no exotic arguments object behavior, because [[Put]] never * calls [[DefineOwnProperty]] (E5 Section 8.12.5, step 5.b). */ duk_hobject *setter; DUK_DD(DUK_DDPRINT("put to an own or inherited accessor, calling setter")); setter = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, curr, desc.e_idx); if (!setter) { goto fail_no_setter; } duk_push_hobject(thr, setter); duk_push_tval(thr, tv_obj); /* note: original, uncoerced base */ duk_push_tval(thr, tv_val); /* [key setter this val] */ #if defined(DUK_USE_NONSTD_SETTER_KEY_ARGUMENT) duk_dup_m4(thr); duk_call_method(thr, 2); /* [key setter this val key] -> [key retval] */ #else duk_call_method(thr, 1); /* [key setter this val] -> [key retval] */ #endif duk_pop_unsafe(thr); /* ignore retval -> [key] */ goto success_no_arguments_exotic; } if (orig == NULL) { /* * Found existing own or inherited plain property, but original * base is a primitive value. */ DUK_DD(DUK_DDPRINT("attempt to create a new property in a primitive base object")); goto fail_base_primitive; } if (curr != orig) { /* * Found existing inherited plain property. * Do an access control check, and if OK, write * new property to 'orig'. */ if (!DUK_HOBJECT_HAS_EXTENSIBLE(orig)) { DUK_DD(DUK_DDPRINT("found existing inherited plain property, but original object is not extensible")); goto fail_not_extensible; } if (!(desc.flags & DUK_PROPDESC_FLAG_WRITABLE)) { DUK_DD(DUK_DDPRINT("found existing inherited plain property, original object is extensible, but inherited property is not writable")); goto fail_not_writable; } DUK_DD(DUK_DDPRINT("put to new property, object extensible, inherited property found and is writable")); goto create_new; } else { /* * Found existing own (non-inherited) plain property. * Do an access control check and update in place. */ if (!(desc.flags & DUK_PROPDESC_FLAG_WRITABLE)) { DUK_DD(DUK_DDPRINT("found existing own (non-inherited) plain property, but property is not writable")); goto fail_not_writable; } if (desc.flags & DUK_PROPDESC_FLAG_VIRTUAL) { DUK_DD(DUK_DDPRINT("found existing own (non-inherited) virtual property, property is writable")); if (DUK_HOBJECT_IS_ARRAY(curr)) { /* * Write to 'length' of an array is a very complex case * handled in a helper which updates both the array elements * and writes the new 'length'. The write may result in an * unconditional RangeError or a partial write (indicated * by a return code). * * Note: the helper has an unnecessary writability check * for 'length', we already know it is writable. */ DUK_ASSERT(key == DUK_HTHREAD_STRING_LENGTH(thr)); /* only virtual array property */ DUK_DDD(DUK_DDDPRINT("writing existing 'length' property to array exotic, invoke complex helper")); /* XXX: the helper currently assumes stack top contains new * 'length' value and the whole calling convention is not very * compatible with what we need. */ duk_push_tval(thr, tv_val); /* [key val] */ rc = duk__handle_put_array_length(thr, orig); duk_pop_unsafe(thr); /* [key val] -> [key] */ if (!rc) { goto fail_array_length_partial; } /* key is 'length', cannot match argument exotic behavior */ goto success_no_arguments_exotic; } #if defined(DUK_USE_BUFFEROBJECT_SUPPORT) else if (DUK_HOBJECT_IS_BUFOBJ(curr)) { duk_hbufobj *h_bufobj; duk_uint_t byte_off; duk_small_uint_t elem_size; h_bufobj = (duk_hbufobj *) curr; DUK_HBUFOBJ_ASSERT_VALID(h_bufobj); DUK_DD(DUK_DDPRINT("writable virtual property is in buffer object")); /* Careful with wrapping: arr_idx upshift may easily wrap, whereas * length downshift won't. */ if (arr_idx < (h_bufobj->length >> h_bufobj->shift) && DUK_HBUFOBJ_HAS_VIRTUAL_INDICES(h_bufobj)) { duk_uint8_t *data; DUK_DDD(DUK_DDDPRINT("writing to buffer data at index %ld", (long) arr_idx)); DUK_ASSERT(arr_idx != DUK__NO_ARRAY_INDEX); /* index/length check guarantees */ byte_off = arr_idx << h_bufobj->shift; /* no wrap assuming h_bufobj->length is valid */ elem_size = (duk_small_uint_t) (1U << h_bufobj->shift); /* Coerce to number before validating pointers etc so that the * number coercions in duk_hbufobj_validated_write() are * guaranteed to be side effect free and not invalidate the * pointer checks we do here. */ duk_push_tval(thr, tv_val); (void) duk_to_number_m1(thr); if (h_bufobj->buf != NULL && DUK_HBUFOBJ_VALID_BYTEOFFSET_EXCL(h_bufobj, byte_off + elem_size)) { data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf) + h_bufobj->offset + byte_off; duk_hbufobj_validated_write(thr, h_bufobj, data, elem_size); } else { DUK_D(DUK_DPRINT("bufobj access out of underlying buffer, ignoring (write skipped)")); } duk_pop_unsafe(thr); goto success_no_arguments_exotic; } } #endif /* DUK_USE_BUFFEROBJECT_SUPPORT */ DUK_D(DUK_DPRINT("should not happen, key %!O", key)); goto fail_internal; /* should not happen */ } DUK_DD(DUK_DDPRINT("put to existing own plain property, property is writable")); goto update_old; } DUK_UNREACHABLE(); next_in_chain: /* XXX: option to pretend property doesn't exist if sanity limit is * hit might be useful. */ if (DUK_UNLIKELY(sanity-- == 0)) { DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT); DUK_WO_NORETURN(return 0;); } curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, curr); } while (curr != NULL); /* * Property not found in prototype chain. */ DUK_DDD(DUK_DDDPRINT("property not found in prototype chain")); if (orig == NULL) { DUK_DD(DUK_DDPRINT("attempt to create a new property in a primitive base object")); goto fail_base_primitive; } if (!DUK_HOBJECT_HAS_EXTENSIBLE(orig)) { DUK_DD(DUK_DDPRINT("put to a new property (not found in prototype chain), but original object not extensible")); goto fail_not_extensible; } goto create_new; update_old: /* * Update an existing property of the base object. */ /* [key] */ DUK_DDD(DUK_DDDPRINT("update an existing property of the original object")); DUK_ASSERT(orig != NULL); #if defined(DUK_USE_ROM_OBJECTS) /* This should not happen because DUK_TAG_OBJECT case checks * for this already, but check just in case. */ if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) orig)) { goto fail_not_writable; } #endif /* Although there are writable virtual properties (e.g. plain buffer * and buffer object number indices), they are handled before we come * here. */ DUK_ASSERT((desc.flags & DUK_PROPDESC_FLAG_VIRTUAL) == 0); DUK_ASSERT(desc.a_idx >= 0 || desc.e_idx >= 0); /* Array own property .length is handled above. */ DUK_ASSERT(!(DUK_HOBJECT_IS_ARRAY(orig) && key == DUK_HTHREAD_STRING_LENGTH(thr))); if (desc.e_idx >= 0) { tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, orig, desc.e_idx); DUK_DDD(DUK_DDDPRINT("previous entry value: %!iT", (duk_tval *) tv)); DUK_TVAL_SET_TVAL_UPDREF(thr, tv, tv_val); /* side effects; e_idx may be invalidated */ /* don't touch property attributes or hash part */ DUK_DD(DUK_DDPRINT("put to an existing entry at index %ld -> new value %!iT", (long) desc.e_idx, (duk_tval *) tv)); } else { /* Note: array entries are always writable, so the writability check * above is pointless for them. The check could be avoided with some * refactoring but is probably not worth it. */ DUK_ASSERT(desc.a_idx >= 0); tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, orig, desc.a_idx); DUK_DDD(DUK_DDDPRINT("previous array value: %!iT", (duk_tval *) tv)); DUK_TVAL_SET_TVAL_UPDREF(thr, tv, tv_val); /* side effects; a_idx may be invalidated */ DUK_DD(DUK_DDPRINT("put to an existing array entry at index %ld -> new value %!iT", (long) desc.a_idx, (duk_tval *) tv)); } /* Regardless of whether property is found in entry or array part, * it may have arguments exotic behavior (array indices may reside * in entry part for abandoned / non-existent array parts). */ goto success_with_arguments_exotic; create_new: /* * Create a new property in the original object. * * Exotic properties need to be reconsidered here from a write * perspective (not just property attributes perspective). * However, the property does not exist in the object already, * so this limits the kind of exotic properties that apply. */ /* [key] */ DUK_DDD(DUK_DDDPRINT("create new property to original object")); DUK_ASSERT(orig != NULL); /* Array own property .length is handled above. */ DUK_ASSERT(!(DUK_HOBJECT_IS_ARRAY(orig) && key == DUK_HTHREAD_STRING_LENGTH(thr))); #if defined(DUK_USE_ROM_OBJECTS) /* This should not happen because DUK_TAG_OBJECT case checks * for this already, but check just in case. */ if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) orig)) { goto fail_not_writable; } #endif /* Not possible because array object 'length' is present * from its creation and cannot be deleted, and is thus * caught as an existing property above. */ DUK_ASSERT(!(DUK_HOBJECT_HAS_EXOTIC_ARRAY(orig) && key == DUK_HTHREAD_STRING_LENGTH(thr))); if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(orig) && arr_idx != DUK__NO_ARRAY_INDEX) { /* automatic length update */ duk_uint32_t old_len; duk_harray *a; a = (duk_harray *) orig; DUK_HARRAY_ASSERT_VALID(a); old_len = a->length; if (arr_idx >= old_len) { DUK_DDD(DUK_DDDPRINT("write new array entry requires length update " "(arr_idx=%ld, old_len=%ld)", (long) arr_idx, (long) old_len)); if (DUK_HARRAY_LENGTH_NONWRITABLE(a)) { DUK_DD(DUK_DDPRINT("attempt to extend array, but array 'length' is not writable")); goto fail_not_writable; } /* Note: actual update happens once write has been completed * without error below. The write should always succeed * from a specification viewpoint, but we may e.g. run out * of memory. It's safer in this order. */ DUK_ASSERT(arr_idx != 0xffffffffUL); new_array_length = arr_idx + 1; /* flag for later write */ } else { DUK_DDD(DUK_DDDPRINT("write new array entry does not require length update " "(arr_idx=%ld, old_len=%ld)", (long) arr_idx, (long) old_len)); } } /* write_to_array_part: */ /* * Write to array part? * * Note: array abandonding requires a property resize which uses * 'rechecks' valstack for temporaries and may cause any existing * valstack pointers to be invalidated. To protect against this, * tv_obj, tv_key, and tv_val are copies of the original inputs. */ if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_ARRAY_PART(orig)) { tv = duk__obtain_arridx_slot(thr, arr_idx, orig); if (tv == NULL) { DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(orig)); goto write_to_entry_part; } /* prev value must be unused, no decref */ DUK_ASSERT(DUK_TVAL_IS_UNUSED(tv)); DUK_TVAL_SET_TVAL(tv, tv_val); DUK_TVAL_INCREF(thr, tv); DUK_DD(DUK_DDPRINT("put to new array entry: %ld -> %!T", (long) arr_idx, (duk_tval *) tv)); /* Note: array part values are [[Writable]], [[Enumerable]], * and [[Configurable]] which matches the required attributes * here. */ goto entry_updated; } write_to_entry_part: /* * Write to entry part */ /* entry allocation updates hash part and increases the key * refcount; may need a props allocation resize but doesn't * 'recheck' the valstack. */ e_idx = duk__hobject_alloc_entry_checked(thr, orig, key); DUK_ASSERT(e_idx >= 0); tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, orig, e_idx); /* prev value can be garbage, no decref */ DUK_TVAL_SET_TVAL(tv, tv_val); DUK_TVAL_INCREF(thr, tv); DUK_HOBJECT_E_SET_FLAGS(thr->heap, orig, e_idx, DUK_PROPDESC_FLAGS_WEC); goto entry_updated; entry_updated: /* * Possible pending array length update, which must only be done * if the actual entry write succeeded. */ if (new_array_length > 0) { /* Note: zero works as a "no update" marker because the new length * can never be zero after a new property is written. */ DUK_ASSERT(DUK_HOBJECT_HAS_EXOTIC_ARRAY(orig)); DUK_DDD(DUK_DDDPRINT("write successful, pending array length update to: %ld", (long) new_array_length)); ((duk_harray *) orig)->length = new_array_length; } /* * Arguments exotic behavior not possible for new properties: all * magically bound properties are initially present in the arguments * object, and if they are deleted, the binding is also removed from * parameter map. */ goto success_no_arguments_exotic; success_with_arguments_exotic: /* * Arguments objects have exotic [[DefineOwnProperty]] which updates * the internal 'map' of arguments for writes to currently mapped * arguments. More conretely, writes to mapped arguments generate * a write to a bound variable. * * The [[Put]] algorithm invokes [[DefineOwnProperty]] for existing * data properties and new properties, but not for existing accessors. * Hence, in E5 Section 10.6 ([[DefinedOwnProperty]] algorithm), we * have a Desc with 'Value' (and possibly other properties too), and * we end up in step 5.b.i. */ if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(orig)) { /* Note: only numbered indices are relevant, so arr_idx fast reject * is good (this is valid unless there are more than 4**32-1 arguments). */ DUK_DDD(DUK_DDDPRINT("putprop successful, arguments exotic behavior needed")); /* Note: we can reuse 'desc' here */ /* XXX: top of stack must contain value, which helper doesn't touch, * rework to use tv_val directly? */ duk_push_tval(thr, tv_val); (void) duk__check_arguments_map_for_put(thr, orig, key, &desc, throw_flag); duk_pop_unsafe(thr); } /* fall thru */ success_no_arguments_exotic: /* shared exit path now */ DUK_DDD(DUK_DDDPRINT("result: success")); duk_pop_unsafe(thr); /* remove key */ return 1; #if defined(DUK_USE_ES6_PROXY) fail_proxy_rejected: DUK_DDD(DUK_DDDPRINT("result: error, proxy rejects")); if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED); DUK_WO_NORETURN(return 0;); } /* Note: no key on stack */ return 0; #endif fail_base_primitive: DUK_DDD(DUK_DDDPRINT("result: error, base primitive")); if (throw_flag) { #if defined(DUK_USE_PARANOID_ERRORS) DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE); #else DUK_ERROR_FMT2(thr, DUK_ERR_TYPE_ERROR, "cannot write property %s of %s", duk_push_string_tval_readable(thr, tv_key), duk_push_string_tval_readable(thr, tv_obj)); #endif DUK_WO_NORETURN(return 0;); } duk_pop_unsafe(thr); /* remove key */ return 0; fail_not_extensible: DUK_DDD(DUK_DDDPRINT("result: error, not extensible")); if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_EXTENSIBLE); DUK_WO_NORETURN(return 0;); } duk_pop_unsafe(thr); /* remove key */ return 0; fail_not_writable: DUK_DDD(DUK_DDDPRINT("result: error, not writable")); if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_WRITABLE); DUK_WO_NORETURN(return 0;); } duk_pop_unsafe(thr); /* remove key */ return 0; #if defined(DUK_USE_ROM_OBJECTS) fail_not_writable_no_pop: DUK_DDD(DUK_DDDPRINT("result: error, not writable")); if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_WRITABLE); DUK_WO_NORETURN(return 0;); } return 0; #endif fail_array_length_partial: DUK_DD(DUK_DDPRINT("result: error, array length write only partially successful")); if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE); DUK_WO_NORETURN(return 0;); } duk_pop_unsafe(thr); /* remove key */ return 0; fail_no_setter: DUK_DDD(DUK_DDDPRINT("result: error, accessor property without setter")); if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_SETTER_UNDEFINED); DUK_WO_NORETURN(return 0;); } duk_pop_unsafe(thr); /* remove key */ return 0; fail_internal: DUK_DDD(DUK_DDDPRINT("result: error, internal")); if (throw_flag) { DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return 0;); } duk_pop_unsafe(thr); /* remove key */ return 0; } /* * ECMAScript compliant [[Delete]](P, Throw). */ DUK_INTERNAL duk_bool_t duk_hobject_delprop_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_small_uint_t flags) { duk_propdesc desc; duk_tval *tv; duk_uint32_t arr_idx; duk_bool_t throw_flag; duk_bool_t force_flag; throw_flag = (flags & DUK_DELPROP_FLAG_THROW); force_flag = (flags & DUK_DELPROP_FLAG_FORCE); DUK_DDD(DUK_DDDPRINT("delprop_raw: thr=%p, obj=%p, key=%p, throw=%ld, force=%ld (obj -> %!O, key -> %!O)", (void *) thr, (void *) obj, (void *) key, (long) throw_flag, (long) force_flag, (duk_heaphdr *) obj, (duk_heaphdr *) key)); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); arr_idx = DUK_HSTRING_GET_ARRIDX_FAST(key); /* 0 = don't push current value */ if (!duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */ DUK_DDD(DUK_DDDPRINT("property not found, succeed always")); goto success; } #if defined(DUK_USE_ROM_OBJECTS) if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) { DUK_DD(DUK_DDPRINT("attempt to delprop on read-only target object")); goto fail_not_configurable; } #endif if ((desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) == 0 && !force_flag) { goto fail_not_configurable; } if (desc.a_idx < 0 && desc.e_idx < 0) { /* Currently there are no deletable virtual properties, but * with force_flag we might attempt to delete one. */ DUK_DD(DUK_DDPRINT("delete failed: property found, force flag, but virtual (and implicitly non-configurable)")); goto fail_virtual; } if (desc.a_idx >= 0) { DUK_ASSERT(desc.e_idx < 0); tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, desc.a_idx); DUK_TVAL_SET_UNUSED_UPDREF(thr, tv); /* side effects */ goto success; } else { DUK_ASSERT(desc.a_idx < 0); /* remove hash entry (no decref) */ #if defined(DUK_USE_HOBJECT_HASH_PART) if (desc.h_idx >= 0) { duk_uint32_t *h_base = DUK_HOBJECT_H_GET_BASE(thr->heap, obj); DUK_DDD(DUK_DDDPRINT("removing hash entry at h_idx %ld", (long) desc.h_idx)); DUK_ASSERT(DUK_HOBJECT_GET_HSIZE(obj) > 0); DUK_ASSERT((duk_uint32_t) desc.h_idx < DUK_HOBJECT_GET_HSIZE(obj)); h_base[desc.h_idx] = DUK__HASH_DELETED; } else { DUK_ASSERT(DUK_HOBJECT_GET_HSIZE(obj) == 0); } #else DUK_ASSERT(DUK_HOBJECT_GET_HSIZE(obj) == 0); #endif /* Remove value. This requires multiple writes so avoid side * effects via no-refzero macros so that e_idx is not * invalidated. */ DUK_DDD(DUK_DDDPRINT("before removing value, e_idx %ld, key %p, key at slot %p", (long) desc.e_idx, (void *) key, (void *) DUK_HOBJECT_E_GET_KEY(thr->heap, obj, desc.e_idx))); DUK_DDD(DUK_DDDPRINT("removing value at e_idx %ld", (long) desc.e_idx)); if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, desc.e_idx)) { duk_hobject *tmp; tmp = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, obj, desc.e_idx); DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, desc.e_idx, NULL); DUK_UNREF(tmp); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, tmp); tmp = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, obj, desc.e_idx); DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, desc.e_idx, NULL); DUK_UNREF(tmp); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, tmp); } else { tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, desc.e_idx); DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ(thr, tv); } #if 0 /* Not strictly necessary because if key == NULL, flag MUST be ignored. */ DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, desc.e_idx, 0); #endif /* Remove key. */ DUK_DDD(DUK_DDDPRINT("before removing key, e_idx %ld, key %p, key at slot %p", (long) desc.e_idx, (void *) key, (void *) DUK_HOBJECT_E_GET_KEY(thr->heap, obj, desc.e_idx))); DUK_DDD(DUK_DDDPRINT("removing key at e_idx %ld", (long) desc.e_idx)); DUK_ASSERT(key == DUK_HOBJECT_E_GET_KEY(thr->heap, obj, desc.e_idx)); DUK_HOBJECT_E_SET_KEY(thr->heap, obj, desc.e_idx, NULL); DUK_HSTRING_DECREF_NORZ(thr, key); /* Trigger refzero side effects only when we're done as a * finalizer might operate on the object and affect the * e_idx we're supposed to use. */ DUK_REFZERO_CHECK_SLOW(thr); goto success; } DUK_UNREACHABLE(); success: /* * Argument exotic [[Delete]] behavior (E5 Section 10.6) is * a post-check, keeping arguments internal 'map' in sync with * any successful deletes (note that property does not need to * exist for delete to 'succeed'). * * Delete key from 'map'. Since 'map' only contains array index * keys, we can use arr_idx for a fast skip. */ DUK_DDD(DUK_DDDPRINT("delete successful, check for arguments exotic behavior")); if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj)) { /* Note: only numbered indices are relevant, so arr_idx fast reject * is good (this is valid unless there are more than 4**32-1 arguments). */ DUK_DDD(DUK_DDDPRINT("delete successful, arguments exotic behavior needed")); /* Note: we can reuse 'desc' here */ (void) duk__check_arguments_map_for_delete(thr, obj, key, &desc); } DUK_DDD(DUK_DDDPRINT("delete successful")); return 1; fail_virtual: /* just use the same "not configurable" error message */ fail_not_configurable: DUK_DDD(DUK_DDDPRINT("delete failed: property found, not configurable")); if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE); DUK_WO_NORETURN(return 0;); } return 0; } /* * DELPROP: ECMAScript property deletion. */ DUK_INTERNAL duk_bool_t duk_hobject_delprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key, duk_bool_t throw_flag) { duk_hstring *key = NULL; #if defined(DUK_USE_ES6_PROXY) duk_propdesc desc; #endif duk_int_t entry_top; duk_uint32_t arr_idx = DUK__NO_ARRAY_INDEX; duk_bool_t rc; DUK_DDD(DUK_DDDPRINT("delprop: thr=%p, obj=%p, key=%p (obj -> %!T, key -> %!T)", (void *) thr, (void *) tv_obj, (void *) tv_key, (duk_tval *) tv_obj, (duk_tval *) tv_key)); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(tv_obj != NULL); DUK_ASSERT(tv_key != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); /* Storing the entry top is cheaper here to ensure stack is correct at exit, * as there are several paths out. */ entry_top = duk_get_top(thr); if (DUK_TVAL_IS_UNDEFINED(tv_obj) || DUK_TVAL_IS_NULL(tv_obj)) { DUK_DDD(DUK_DDDPRINT("base object is undefined or null -> reject")); goto fail_invalid_base_uncond; } duk_push_tval(thr, tv_obj); duk_push_tval(thr, tv_key); tv_obj = DUK_GET_TVAL_NEGIDX(thr, -2); if (DUK_TVAL_IS_OBJECT(tv_obj)) { duk_hobject *obj = DUK_TVAL_GET_OBJECT(tv_obj); DUK_ASSERT(obj != NULL); #if defined(DUK_USE_ES6_PROXY) if (DUK_UNLIKELY(DUK_HOBJECT_IS_PROXY(obj))) { duk_hobject *h_target; duk_bool_t tmp_bool; /* Note: proxy handling must happen before key is string coerced. */ if (duk__proxy_check_prop(thr, obj, DUK_STRIDX_DELETE_PROPERTY, tv_key, &h_target)) { /* -> [ ... obj key trap handler ] */ DUK_DDD(DUK_DDDPRINT("-> proxy object 'deleteProperty' for key %!T", (duk_tval *) tv_key)); duk_push_hobject(thr, h_target); /* target */ duk_dup_m4(thr); /* P */ duk_call_method(thr, 2 /*nargs*/); tmp_bool = duk_to_boolean_top_pop(thr); if (!tmp_bool) { goto fail_proxy_rejected; /* retval indicates delete failed */ } /* Target object must be checked for a conflicting * non-configurable property. */ tv_key = DUK_GET_TVAL_NEGIDX(thr, -1); arr_idx = duk__push_tval_to_property_key(thr, tv_key, &key); DUK_ASSERT(key != NULL); if (duk__get_own_propdesc_raw(thr, h_target, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */ duk_small_int_t desc_reject; DUK_DDD(DUK_DDDPRINT("proxy 'deleteProperty': target has matching property %!O, check for " "conflicting property; desc.flags=0x%08lx, " "desc.get=%p, desc.set=%p", (duk_heaphdr *) key, (unsigned long) desc.flags, (void *) desc.get, (void *) desc.set)); desc_reject = !(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE); if (desc_reject) { /* unconditional */ DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED); DUK_WO_NORETURN(return 0;); } } rc = 1; /* success */ goto done_rc; } obj = h_target; /* resume delete to target */ } #endif /* DUK_USE_ES6_PROXY */ arr_idx = duk__to_property_key(thr, -1, &key); DUK_ASSERT(key != NULL); rc = duk_hobject_delprop_raw(thr, obj, key, throw_flag ? DUK_DELPROP_FLAG_THROW : 0); goto done_rc; } else if (DUK_TVAL_IS_STRING(tv_obj)) { /* String has .length and array index virtual properties * which can't be deleted. No need for a symbol check; * no offending virtual symbols exist. */ /* XXX: unnecessary string coercion for array indices, * intentional to keep small. */ duk_hstring *h = DUK_TVAL_GET_STRING(tv_obj); DUK_ASSERT(h != NULL); arr_idx = duk__to_property_key(thr, -1, &key); DUK_ASSERT(key != NULL); if (key == DUK_HTHREAD_STRING_LENGTH(thr)) { goto fail_not_configurable; } if (arr_idx != DUK__NO_ARRAY_INDEX && arr_idx < DUK_HSTRING_GET_CHARLEN(h)) { goto fail_not_configurable; } } else if (DUK_TVAL_IS_BUFFER(tv_obj)) { /* XXX: unnecessary string coercion for array indices, * intentional to keep small; some overlap with string * handling. */ duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv_obj); DUK_ASSERT(h != NULL); arr_idx = duk__to_property_key(thr, -1, &key); DUK_ASSERT(key != NULL); if (key == DUK_HTHREAD_STRING_LENGTH(thr)) { goto fail_not_configurable; } if (arr_idx != DUK__NO_ARRAY_INDEX && arr_idx < DUK_HBUFFER_GET_SIZE(h)) { goto fail_not_configurable; } } else if (DUK_TVAL_IS_LIGHTFUNC(tv_obj)) { /* Lightfunc has no virtual properties since Duktape 2.2 * so success. Still must coerce key for side effects. */ arr_idx = duk__to_property_key(thr, -1, &key); DUK_ASSERT(key != NULL); DUK_UNREF(key); } /* non-object base, no offending virtual property */ rc = 1; goto done_rc; done_rc: duk_set_top_unsafe(thr, entry_top); return rc; fail_invalid_base_uncond: /* Note: unconditional throw */ DUK_ASSERT(duk_get_top(thr) == entry_top); #if defined(DUK_USE_PARANOID_ERRORS) DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE); #else DUK_ERROR_FMT2(thr, DUK_ERR_TYPE_ERROR, "cannot delete property %s of %s", duk_push_string_tval_readable(thr, tv_key), duk_push_string_tval_readable(thr, tv_obj)); #endif DUK_WO_NORETURN(return 0;); #if defined(DUK_USE_ES6_PROXY) fail_proxy_rejected: if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED); DUK_WO_NORETURN(return 0;); } duk_set_top_unsafe(thr, entry_top); return 0; #endif fail_not_configurable: if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE); DUK_WO_NORETURN(return 0;); } duk_set_top_unsafe(thr, entry_top); return 0; } /* * Internal helper to define a property with specific flags, ignoring * normal semantics such as extensibility, write protection etc. * Overwrites any existing value and attributes unless caller requests * that value only be updated if it doesn't already exists. * * Does not support: * - virtual properties (error if write attempted) * - getter/setter properties (error if write attempted) * - non-default (!= WEC) attributes for array entries (error if attempted) * - array abandoning: if array part exists, it is always extended * - array 'length' updating * * Stack: [... in_val] -> [] * * Used for e.g. built-in initialization and environment record * operations. */ DUK_INTERNAL void duk_hobject_define_property_internal(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_small_uint_t flags) { duk_propdesc desc; duk_uint32_t arr_idx; duk_int_t e_idx; duk_tval *tv1 = NULL; duk_tval *tv2 = NULL; duk_small_uint_t propflags = flags & DUK_PROPDESC_FLAGS_MASK; /* mask out flags not actually stored */ DUK_DDD(DUK_DDDPRINT("define new property (internal): thr=%p, obj=%!O, key=%!O, flags=0x%02lx, val=%!T", (void *) thr, (duk_heaphdr *) obj, (duk_heaphdr *) key, (unsigned long) flags, (duk_tval *) duk_get_tval(thr, -1))); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); DUK_ASSERT(duk_is_valid_index(thr, -1)); /* contains value */ arr_idx = DUK_HSTRING_GET_ARRIDX_SLOW(key); if (duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */ if (desc.e_idx >= 0) { if (flags & DUK_PROPDESC_FLAG_NO_OVERWRITE) { DUK_DDD(DUK_DDDPRINT("property already exists in the entry part -> skip as requested")); goto pop_exit; } DUK_DDD(DUK_DDDPRINT("property already exists in the entry part -> update value and attributes")); if (DUK_UNLIKELY(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, desc.e_idx))) { DUK_D(DUK_DPRINT("existing property is an accessor, not supported")); goto error_internal; } DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, desc.e_idx, propflags); tv1 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, desc.e_idx); } else if (desc.a_idx >= 0) { if (flags & DUK_PROPDESC_FLAG_NO_OVERWRITE) { DUK_DDD(DUK_DDDPRINT("property already exists in the array part -> skip as requested")); goto pop_exit; } DUK_DDD(DUK_DDDPRINT("property already exists in the array part -> update value (assert attributes)")); if (propflags != DUK_PROPDESC_FLAGS_WEC) { DUK_D(DUK_DPRINT("existing property in array part, but propflags not WEC (0x%02lx)", (unsigned long) propflags)); goto error_internal; } tv1 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, desc.a_idx); } else { if (flags & DUK_PROPDESC_FLAG_NO_OVERWRITE) { DUK_DDD(DUK_DDDPRINT("property already exists but is virtual -> skip as requested")); goto pop_exit; } if (key == DUK_HTHREAD_STRING_LENGTH(thr) && DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)) { duk_uint32_t new_len; #if defined(DUK_USE_DEBUG) duk_uint32_t prev_len; prev_len = ((duk_harray *) obj)->length; #endif new_len = duk__to_new_array_length_checked(thr, DUK_GET_TVAL_NEGIDX(thr, -1)); ((duk_harray *) obj)->length = new_len; DUK_DD(DUK_DDPRINT("internal define property for array .length: %ld -> %ld", (long) prev_len, (long) ((duk_harray *) obj)->length)); goto pop_exit; } DUK_DD(DUK_DDPRINT("property already exists but is virtual -> failure")); goto error_virtual; } goto write_value; } if (DUK_HOBJECT_HAS_ARRAY_PART(obj)) { if (arr_idx != DUK__NO_ARRAY_INDEX) { DUK_DDD(DUK_DDDPRINT("property does not exist, object has array part -> possibly extend array part and write value (assert attributes)")); DUK_ASSERT(propflags == DUK_PROPDESC_FLAGS_WEC); tv1 = duk__obtain_arridx_slot(thr, arr_idx, obj); if (tv1 == NULL) { DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(obj)); goto write_to_entry_part; } tv1 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, arr_idx); goto write_value; } } write_to_entry_part: DUK_DDD(DUK_DDDPRINT("property does not exist, object belongs in entry part -> allocate new entry and write value and attributes")); e_idx = duk__hobject_alloc_entry_checked(thr, obj, key); /* increases key refcount */ DUK_ASSERT(e_idx >= 0); DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, e_idx, propflags); tv1 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, e_idx); /* new entry: previous value is garbage; set to undefined to share write_value */ DUK_TVAL_SET_UNDEFINED(tv1); goto write_value; write_value: /* tv1 points to value storage */ tv2 = duk_require_tval(thr, -1); /* late lookup, avoid side effects */ DUK_DDD(DUK_DDDPRINT("writing/updating value: %!T -> %!T", (duk_tval *) tv1, (duk_tval *) tv2)); DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */ goto pop_exit; pop_exit: duk_pop_unsafe(thr); /* remove in_val */ return; error_virtual: /* share error message */ error_internal: DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return;); } /* * Fast path for defining array indexed values without interning the key. * This is used by e.g. code for Array prototype and traceback creation so * must avoid interning. */ DUK_INTERNAL void duk_hobject_define_property_internal_arridx(duk_hthread *thr, duk_hobject *obj, duk_uarridx_t arr_idx, duk_small_uint_t flags) { duk_hstring *key; duk_tval *tv1, *tv2; DUK_DDD(DUK_DDDPRINT("define new property (internal) arr_idx fast path: thr=%p, obj=%!O, " "arr_idx=%ld, flags=0x%02lx, val=%!T", (void *) thr, obj, (long) arr_idx, (unsigned long) flags, (duk_tval *) duk_get_tval(thr, -1))); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)); if (DUK_HOBJECT_HAS_ARRAY_PART(obj) && arr_idx != DUK__NO_ARRAY_INDEX && flags == DUK_PROPDESC_FLAGS_WEC) { DUK_ASSERT((flags & DUK_PROPDESC_FLAG_NO_OVERWRITE) == 0); /* covered by comparison */ DUK_DDD(DUK_DDDPRINT("define property to array part (property may or may not exist yet)")); tv1 = duk__obtain_arridx_slot(thr, arr_idx, obj); if (tv1 == NULL) { DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(obj)); goto write_slow; } tv2 = duk_require_tval(thr, -1); DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */ duk_pop_unsafe(thr); /* [ ...val ] -> [ ... ] */ return; } write_slow: DUK_DDD(DUK_DDDPRINT("define property fast path didn't work, use slow path")); key = duk_push_uint_to_hstring(thr, (duk_uint_t) arr_idx); DUK_ASSERT(key != NULL); duk_insert(thr, -2); /* [ ... val key ] -> [ ... key val ] */ duk_hobject_define_property_internal(thr, obj, key, flags); duk_pop_unsafe(thr); /* [ ... key ] -> [ ... ] */ } /* * Internal helpers for managing object 'length' */ DUK_INTERNAL duk_size_t duk_hobject_get_length(duk_hthread *thr, duk_hobject *obj) { duk_double_t val; DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(obj != NULL); /* Fast path for Arrays. */ if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)) { return ((duk_harray *) obj)->length; } /* Slow path, .length can be e.g. accessor, obj can be a Proxy, etc. */ duk_push_hobject(thr, obj); duk_push_hstring_stridx(thr, DUK_STRIDX_LENGTH); (void) duk_hobject_getprop(thr, DUK_GET_TVAL_NEGIDX(thr, -2), DUK_GET_TVAL_NEGIDX(thr, -1)); val = duk_to_number_m1(thr); duk_pop_3_unsafe(thr); /* This isn't part of ECMAScript semantics; return a value within * duk_size_t range, or 0 otherwise. */ if (val >= 0.0 && val <= (duk_double_t) DUK_SIZE_MAX) { return (duk_size_t) val; } return 0; } /* * Fast finalizer check for an object. Walks the prototype chain, checking * for finalizer presence using DUK_HOBJECT_FLAG_HAVE_FINALIZER which is kept * in sync with the actual property when setting/removing the finalizer. */ #if defined(DUK_USE_HEAPPTR16) DUK_INTERNAL duk_bool_t duk_hobject_has_finalizer_fast_raw(duk_heap *heap, duk_hobject *obj) { #else DUK_INTERNAL duk_bool_t duk_hobject_has_finalizer_fast_raw(duk_hobject *obj) { #endif duk_uint_t sanity; DUK_ASSERT(obj != NULL); sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY; do { if (DUK_UNLIKELY(DUK_HOBJECT_HAS_HAVE_FINALIZER(obj))) { return 1; } if (DUK_UNLIKELY(sanity-- == 0)) { DUK_D(DUK_DPRINT("prototype loop when checking for finalizer existence; returning false")); return 0; } #if defined(DUK_USE_HEAPPTR16) DUK_ASSERT(heap != NULL); obj = DUK_HOBJECT_GET_PROTOTYPE(heap, obj); #else obj = DUK_HOBJECT_GET_PROTOTYPE(NULL, obj); /* 'heap' arg ignored */ #endif } while (obj != NULL); return 0; } /* * Object.getOwnPropertyDescriptor() (E5 Sections 15.2.3.3, 8.10.4) * * [ ... key ] -> [ ... desc/undefined ] */ DUK_INTERNAL void duk_hobject_object_get_own_property_descriptor(duk_hthread *thr, duk_idx_t obj_idx) { duk_hobject *obj; duk_hstring *key; duk_propdesc pd; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); obj = duk_require_hobject_promote_mask(thr, obj_idx, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); key = duk_to_property_key_hstring(thr, -1); DUK_ASSERT(key != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); if (!duk_hobject_get_own_propdesc(thr, obj, key, &pd, DUK_GETDESC_FLAG_PUSH_VALUE)) { duk_push_undefined(thr); duk_remove_m2(thr); return; } duk_push_object(thr); /* [ ... key value desc ] */ if (DUK_PROPDESC_IS_ACCESSOR(&pd)) { /* If a setter/getter is missing (undefined), the descriptor must * still have the property present with the value 'undefined'. */ if (pd.get) { duk_push_hobject(thr, pd.get); } else { duk_push_undefined(thr); } duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_GET); if (pd.set) { duk_push_hobject(thr, pd.set); } else { duk_push_undefined(thr); } duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_SET); } else { duk_dup_m2(thr); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_VALUE); duk_push_boolean(thr, DUK_PROPDESC_IS_WRITABLE(&pd)); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_WRITABLE); } duk_push_boolean(thr, DUK_PROPDESC_IS_ENUMERABLE(&pd)); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_ENUMERABLE); duk_push_boolean(thr, DUK_PROPDESC_IS_CONFIGURABLE(&pd)); duk_put_prop_stridx_short(thr, -2, DUK_STRIDX_CONFIGURABLE); /* [ ... key value desc ] */ duk_replace(thr, -3); duk_pop_unsafe(thr); /* -> [ ... desc ] */ } /* * NormalizePropertyDescriptor() related helper. * * Internal helper which validates and normalizes a property descriptor * represented as an ECMAScript object (e.g. argument to defineProperty()). * The output of this conversion is a set of defprop_flags and possibly * some values pushed on the value stack to (1) ensure borrowed pointers * remain valid, and (2) avoid unnecessary pops for footprint reasons. * Caller must manage stack top carefully because the number of values * pushed depends on the input property descriptor. * * The original descriptor object must not be altered in the process. */ /* XXX: very basic optimization -> duk_get_prop_stridx_top */ DUK_INTERNAL void duk_hobject_prepare_property_descriptor(duk_hthread *thr, duk_idx_t idx_in, duk_uint_t *out_defprop_flags, duk_idx_t *out_idx_value, duk_hobject **out_getter, duk_hobject **out_setter) { duk_idx_t idx_value = -1; duk_hobject *getter = NULL; duk_hobject *setter = NULL; duk_bool_t is_data_desc = 0; duk_bool_t is_acc_desc = 0; duk_uint_t defprop_flags = 0; DUK_ASSERT(out_defprop_flags != NULL); DUK_ASSERT(out_idx_value != NULL); DUK_ASSERT(out_getter != NULL); DUK_ASSERT(out_setter != NULL); DUK_ASSERT(idx_in <= 0x7fffL); /* short variants would be OK, but not used to avoid shifts */ /* Must be an object, otherwise TypeError (E5.1 Section 8.10.5, step 1). */ idx_in = duk_require_normalize_index(thr, idx_in); (void) duk_require_hobject(thr, idx_in); /* The coercion order must match the ToPropertyDescriptor() algorithm * so that side effects in coercion happen in the correct order. * (This order also happens to be compatible with duk_def_prop(), * although it doesn't matter in practice.) */ if (duk_get_prop_stridx(thr, idx_in, DUK_STRIDX_VALUE)) { is_data_desc = 1; defprop_flags |= DUK_DEFPROP_HAVE_VALUE; idx_value = duk_get_top_index(thr); } if (duk_get_prop_stridx(thr, idx_in, DUK_STRIDX_WRITABLE)) { is_data_desc = 1; if (duk_to_boolean_top_pop(thr)) { defprop_flags |= DUK_DEFPROP_HAVE_WRITABLE | DUK_DEFPROP_WRITABLE; } else { defprop_flags |= DUK_DEFPROP_HAVE_WRITABLE; } } if (duk_get_prop_stridx(thr, idx_in, DUK_STRIDX_GET)) { duk_tval *tv = duk_require_tval(thr, -1); duk_hobject *h_get; if (DUK_TVAL_IS_UNDEFINED(tv)) { /* undefined is accepted */ DUK_ASSERT(getter == NULL); } else { /* NOTE: lightfuncs are coerced to full functions because * lightfuncs don't fit into a property value slot. This * has some side effects, see test-dev-lightfunc-accessor.js. */ h_get = duk_get_hobject_promote_lfunc(thr, -1); if (h_get == NULL || !DUK_HOBJECT_IS_CALLABLE(h_get)) { goto type_error; } getter = h_get; } is_acc_desc = 1; defprop_flags |= DUK_DEFPROP_HAVE_GETTER; } if (duk_get_prop_stridx(thr, idx_in, DUK_STRIDX_SET)) { duk_tval *tv = duk_require_tval(thr, -1); duk_hobject *h_set; if (DUK_TVAL_IS_UNDEFINED(tv)) { /* undefined is accepted */ DUK_ASSERT(setter == NULL); } else { /* NOTE: lightfuncs are coerced to full functions because * lightfuncs don't fit into a property value slot. This * has some side effects, see test-dev-lightfunc-accessor.js. */ h_set = duk_get_hobject_promote_lfunc(thr, -1); if (h_set == NULL || !DUK_HOBJECT_IS_CALLABLE(h_set)) { goto type_error; } setter = h_set; } is_acc_desc = 1; defprop_flags |= DUK_DEFPROP_HAVE_SETTER; } if (duk_get_prop_stridx(thr, idx_in, DUK_STRIDX_ENUMERABLE)) { if (duk_to_boolean_top_pop(thr)) { defprop_flags |= DUK_DEFPROP_HAVE_ENUMERABLE | DUK_DEFPROP_ENUMERABLE; } else { defprop_flags |= DUK_DEFPROP_HAVE_ENUMERABLE; } } if (duk_get_prop_stridx(thr, idx_in, DUK_STRIDX_CONFIGURABLE)) { if (duk_to_boolean_top_pop(thr)) { defprop_flags |= DUK_DEFPROP_HAVE_CONFIGURABLE | DUK_DEFPROP_CONFIGURABLE; } else { defprop_flags |= DUK_DEFPROP_HAVE_CONFIGURABLE; } } if (is_data_desc && is_acc_desc) { goto type_error; } *out_defprop_flags = defprop_flags; *out_idx_value = idx_value; *out_getter = getter; *out_setter = setter; /* [ ... [multiple values] ] */ return; type_error: DUK_ERROR_TYPE(thr, DUK_STR_INVALID_DESCRIPTOR); DUK_WO_NORETURN(return;); } /* * Object.defineProperty() related helper (E5 Section 15.2.3.6). * Also handles ES2015 Reflect.defineProperty(). * * Inlines all [[DefineOwnProperty]] exotic behaviors. * * Note: ECMAScript compliant [[DefineOwnProperty]](P, Desc, Throw) is not * implemented directly, but Object.defineProperty() serves its purpose. * We don't need the [[DefineOwnProperty]] internally and we don't have a * property descriptor with 'missing values' so it's easier to avoid it * entirely. * * Note: this is only called for actual objects, not primitive values. * This must support virtual properties for full objects (e.g. Strings) * but not for plain values (e.g. strings). Lightfuncs, even though * primitive in a sense, are treated like objects and accepted as target * values. */ /* XXX: this is a major target for size optimization */ DUK_INTERNAL duk_bool_t duk_hobject_define_property_helper(duk_hthread *thr, duk_uint_t defprop_flags, duk_hobject *obj, duk_hstring *key, duk_idx_t idx_value, duk_hobject *get, duk_hobject *set, duk_bool_t throw_flag) { duk_uint32_t arr_idx; duk_tval tv; duk_bool_t has_enumerable; duk_bool_t has_configurable; duk_bool_t has_writable; duk_bool_t has_value; duk_bool_t has_get; duk_bool_t has_set; duk_bool_t is_enumerable; duk_bool_t is_configurable; duk_bool_t is_writable; duk_bool_t force_flag; duk_small_uint_t new_flags; duk_propdesc curr; duk_uint32_t arridx_new_array_length; /* != 0 => post-update for array 'length' (used when key is an array index) */ duk_uint32_t arrlen_old_len; duk_uint32_t arrlen_new_len; duk_bool_t pending_write_protect; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT(key != NULL); /* idx_value may be < 0 (no value), set and get may be NULL */ DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); /* All the flags fit in 16 bits, so will fit into duk_bool_t. */ has_writable = (defprop_flags & DUK_DEFPROP_HAVE_WRITABLE); has_enumerable = (defprop_flags & DUK_DEFPROP_HAVE_ENUMERABLE); has_configurable = (defprop_flags & DUK_DEFPROP_HAVE_CONFIGURABLE); has_value = (defprop_flags & DUK_DEFPROP_HAVE_VALUE); has_get = (defprop_flags & DUK_DEFPROP_HAVE_GETTER); has_set = (defprop_flags & DUK_DEFPROP_HAVE_SETTER); is_writable = (defprop_flags & DUK_DEFPROP_WRITABLE); is_enumerable = (defprop_flags & DUK_DEFPROP_ENUMERABLE); is_configurable = (defprop_flags & DUK_DEFPROP_CONFIGURABLE); force_flag = (defprop_flags & DUK_DEFPROP_FORCE); arr_idx = DUK_HSTRING_GET_ARRIDX_SLOW(key); arridx_new_array_length = 0; pending_write_protect = 0; arrlen_old_len = 0; arrlen_new_len = 0; DUK_DDD(DUK_DDDPRINT("has_enumerable=%ld is_enumerable=%ld " "has_configurable=%ld is_configurable=%ld " "has_writable=%ld is_writable=%ld " "has_value=%ld value=%!T " "has_get=%ld get=%p=%!O " "has_set=%ld set=%p=%!O " "arr_idx=%ld throw_flag=!%ld", (long) has_enumerable, (long) is_enumerable, (long) has_configurable, (long) is_configurable, (long) has_writable, (long) is_writable, (long) has_value, (duk_tval *) (idx_value >= 0 ? duk_get_tval(thr, idx_value) : NULL), (long) has_get, (void *) get, (duk_heaphdr *) get, (long) has_set, (void *) set, (duk_heaphdr *) set, (long) arr_idx, (long) throw_flag)); /* * Array exotic behaviors can be implemented at this point. The local variables * are essentially a 'value copy' of the input descriptor (Desc), which is modified * by the Array [[DefineOwnProperty]] (E5 Section 15.4.5.1). */ if (!DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)) { goto skip_array_exotic; } if (key == DUK_HTHREAD_STRING_LENGTH(thr)) { duk_harray *a; /* E5 Section 15.4.5.1, step 3, steps a - i are implemented here, j - n at the end */ if (!has_value) { DUK_DDD(DUK_DDDPRINT("exotic array behavior for 'length', but no value in descriptor -> normal behavior")); goto skip_array_exotic; } DUK_DDD(DUK_DDDPRINT("exotic array behavior for 'length', value present in descriptor -> exotic behavior")); /* * Get old and new length */ a = (duk_harray *) obj; DUK_HARRAY_ASSERT_VALID(a); arrlen_old_len = a->length; DUK_ASSERT(idx_value >= 0); arrlen_new_len = duk__to_new_array_length_checked(thr, DUK_GET_TVAL_POSIDX(thr, idx_value)); duk_push_u32(thr, arrlen_new_len); duk_replace(thr, idx_value); /* step 3.e: replace 'Desc.[[Value]]' */ DUK_DDD(DUK_DDDPRINT("old_len=%ld, new_len=%ld", (long) arrlen_old_len, (long) arrlen_new_len)); if (arrlen_new_len >= arrlen_old_len) { /* standard behavior, step 3.f.i */ DUK_DDD(DUK_DDDPRINT("new length is same or higher as previous => standard behavior")); goto skip_array_exotic; } DUK_DDD(DUK_DDDPRINT("new length is smaller than previous => exotic post behavior")); /* XXX: consolidated algorithm step 15.f -> redundant? */ if (DUK_HARRAY_LENGTH_NONWRITABLE(a) && !force_flag) { /* Array .length is always non-configurable; if it's also * non-writable, don't allow it to be written. */ goto fail_not_configurable; } /* steps 3.h and 3.i */ if (has_writable && !is_writable) { DUK_DDD(DUK_DDDPRINT("desc writable is false, force it back to true, and flag pending write protect")); is_writable = 1; pending_write_protect = 1; } /* remaining actual steps are carried out if standard DefineOwnProperty succeeds */ } else if (arr_idx != DUK__NO_ARRAY_INDEX) { /* XXX: any chance of unifying this with the 'length' key handling? */ /* E5 Section 15.4.5.1, step 4 */ duk_uint32_t old_len; duk_harray *a; a = (duk_harray *) obj; DUK_HARRAY_ASSERT_VALID(a); old_len = a->length; if (arr_idx >= old_len) { DUK_DDD(DUK_DDDPRINT("defineProperty requires array length update " "(arr_idx=%ld, old_len=%ld)", (long) arr_idx, (long) old_len)); if (DUK_HARRAY_LENGTH_NONWRITABLE(a) && !force_flag) { /* Array .length is always non-configurable, so * if it's also non-writable, don't allow a value * write. With force flag allow writing. */ goto fail_not_configurable; } /* actual update happens once write has been completed without * error below. */ DUK_ASSERT(arr_idx != 0xffffffffUL); arridx_new_array_length = arr_idx + 1; } else { DUK_DDD(DUK_DDDPRINT("defineProperty does not require length update " "(arr_idx=%ld, old_len=%ld) -> standard behavior", (long) arr_idx, (long) old_len)); } } skip_array_exotic: /* XXX: There is currently no support for writing buffer object * indexed elements here. Attempt to do so will succeed and * write a concrete property into the buffer object. This should * be fixed at some point but because buffers are a custom feature * anyway, this is relatively unimportant. */ /* * Actual Object.defineProperty() default algorithm. */ /* * First check whether property exists; if not, simple case. This covers * steps 1-4. */ if (!duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &curr, DUK_GETDESC_FLAG_PUSH_VALUE)) { DUK_DDD(DUK_DDDPRINT("property does not exist")); if (!DUK_HOBJECT_HAS_EXTENSIBLE(obj) && !force_flag) { goto fail_not_extensible; } #if defined(DUK_USE_ROM_OBJECTS) /* ROM objects are never extensible but force flag may * allow us to come here anyway. */ DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj) || !DUK_HOBJECT_HAS_EXTENSIBLE(obj)); if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) { DUK_D(DUK_DPRINT("attempt to define property on a read-only target object")); goto fail_not_configurable; } #endif /* XXX: share final setting code for value and flags? difficult because * refcount code is different. Share entry allocation? But can't allocate * until array index checked. */ /* steps 4.a and 4.b are tricky */ if (has_set || has_get) { duk_int_t e_idx; DUK_DDD(DUK_DDDPRINT("create new accessor property")); DUK_ASSERT(has_set || set == NULL); DUK_ASSERT(has_get || get == NULL); DUK_ASSERT(!has_value); DUK_ASSERT(!has_writable); new_flags = DUK_PROPDESC_FLAG_ACCESSOR; /* defaults, E5 Section 8.6.1, Table 7 */ if (has_enumerable && is_enumerable) { new_flags |= DUK_PROPDESC_FLAG_ENUMERABLE; } if (has_configurable && is_configurable) { new_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE; } if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_ARRAY_PART(obj)) { DUK_DDD(DUK_DDDPRINT("accessor cannot go to array part, abandon array")); duk__abandon_array_part(thr, obj); } /* write to entry part */ e_idx = duk__hobject_alloc_entry_checked(thr, obj, key); DUK_ASSERT(e_idx >= 0); DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, e_idx, get); DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, e_idx, set); DUK_HOBJECT_INCREF_ALLOWNULL(thr, get); DUK_HOBJECT_INCREF_ALLOWNULL(thr, set); DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, e_idx, new_flags); goto success_exotics; } else { duk_int_t e_idx; duk_tval *tv2; DUK_DDD(DUK_DDDPRINT("create new data property")); DUK_ASSERT(!has_set); DUK_ASSERT(!has_get); new_flags = 0; /* defaults, E5 Section 8.6.1, Table 7 */ if (has_writable && is_writable) { new_flags |= DUK_PROPDESC_FLAG_WRITABLE; } if (has_enumerable && is_enumerable) { new_flags |= DUK_PROPDESC_FLAG_ENUMERABLE; } if (has_configurable && is_configurable) { new_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE; } if (has_value) { duk_tval *tv_tmp = duk_require_tval(thr, idx_value); DUK_TVAL_SET_TVAL(&tv, tv_tmp); } else { DUK_TVAL_SET_UNDEFINED(&tv); /* default value */ } if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_ARRAY_PART(obj)) { if (new_flags == DUK_PROPDESC_FLAGS_WEC) { DUK_DDD(DUK_DDDPRINT("new data property attributes match array defaults, attempt to write to array part")); tv2 = duk__obtain_arridx_slot(thr, arr_idx, obj); if (tv2 == NULL) { DUK_DDD(DUK_DDDPRINT("failed writing to array part, abandoned array")); } else { DUK_DDD(DUK_DDDPRINT("success in writing to array part")); DUK_ASSERT(DUK_HOBJECT_HAS_ARRAY_PART(obj)); DUK_ASSERT(DUK_TVAL_IS_UNUSED(tv2)); DUK_TVAL_SET_TVAL(tv2, &tv); DUK_TVAL_INCREF(thr, tv2); goto success_exotics; } } else { DUK_DDD(DUK_DDDPRINT("new data property cannot go to array part, abandon array")); duk__abandon_array_part(thr, obj); } /* fall through */ } /* write to entry part */ e_idx = duk__hobject_alloc_entry_checked(thr, obj, key); DUK_ASSERT(e_idx >= 0); tv2 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, e_idx); DUK_TVAL_SET_TVAL(tv2, &tv); DUK_TVAL_INCREF(thr, tv2); DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, e_idx, new_flags); goto success_exotics; } DUK_UNREACHABLE(); } /* we currently assume virtual properties are not configurable (as none of them are) */ DUK_ASSERT((curr.e_idx >= 0 || curr.a_idx >= 0) || !(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE)); /* [obj key desc value get set curr_value] */ /* * Property already exists. Steps 5-6 detect whether any changes need * to be made. */ if (has_enumerable) { if (is_enumerable) { if (!(curr.flags & DUK_PROPDESC_FLAG_ENUMERABLE)) { goto need_check; } } else { if (curr.flags & DUK_PROPDESC_FLAG_ENUMERABLE) { goto need_check; } } } if (has_configurable) { if (is_configurable) { if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE)) { goto need_check; } } else { if (curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) { goto need_check; } } } if (has_value) { duk_tval *tmp1; duk_tval *tmp2; /* attempt to change from accessor to data property */ if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) { goto need_check; } tmp1 = duk_require_tval(thr, -1); /* curr value */ tmp2 = duk_require_tval(thr, idx_value); /* new value */ if (!duk_js_samevalue(tmp1, tmp2)) { goto need_check; } } if (has_writable) { /* attempt to change from accessor to data property */ if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) { goto need_check; } if (is_writable) { if (!(curr.flags & DUK_PROPDESC_FLAG_WRITABLE)) { goto need_check; } } else { if (curr.flags & DUK_PROPDESC_FLAG_WRITABLE) { goto need_check; } } } if (has_set) { if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) { if (set != curr.set) { goto need_check; } } else { goto need_check; } } if (has_get) { if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) { if (get != curr.get) { goto need_check; } } else { goto need_check; } } /* property exists, either 'desc' is empty, or all values * match (SameValue) */ goto success_no_exotics; need_check: /* * Some change(s) need to be made. Steps 7-11. */ /* shared checks for all descriptor types */ if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) { if (has_configurable && is_configurable) { goto fail_not_configurable; } if (has_enumerable) { if (curr.flags & DUK_PROPDESC_FLAG_ENUMERABLE) { if (!is_enumerable) { goto fail_not_configurable; } } else { if (is_enumerable) { goto fail_not_configurable; } } } } /* Virtual properties don't have backing so they can't mostly be * edited. Some virtual properties are, however, writable: for * example, virtual index properties of buffer objects and Array * instance .length. These are not configurable so the checks * above mostly cover attempts to change them, except when the * duk_def_prop() call is used with DUK_DEFPROP_FORCE; even in * that case we can't forcibly change the property attributes * because they don't have concrete backing. */ /* XXX: for ROM objects too it'd be best if value modify was * allowed if the value matches SameValue. */ /* Reject attempt to change a read-only object. */ #if defined(DUK_USE_ROM_OBJECTS) if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) { DUK_DD(DUK_DDPRINT("attempt to define property on read-only target object")); goto fail_not_configurable; } #endif /* descriptor type specific checks */ if (has_set || has_get) { /* IsAccessorDescriptor(desc) == true */ DUK_ASSERT(!has_writable); DUK_ASSERT(!has_value); if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) { /* curr and desc are accessors */ if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) { if (has_set && set != curr.set) { goto fail_not_configurable; } if (has_get && get != curr.get) { goto fail_not_configurable; } } } else { duk_bool_t rc; duk_tval *tv1; /* curr is data, desc is accessor */ if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) { goto fail_not_configurable; } DUK_DDD(DUK_DDDPRINT("convert property to accessor property")); if (curr.a_idx >= 0) { DUK_DDD(DUK_DDDPRINT("property to convert is stored in an array entry, abandon array and re-lookup")); duk__abandon_array_part(thr, obj); duk_pop_unsafe(thr); /* remove old value */ rc = duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &curr, DUK_GETDESC_FLAG_PUSH_VALUE); DUK_UNREF(rc); DUK_ASSERT(rc != 0); DUK_ASSERT(curr.e_idx >= 0 && curr.a_idx < 0); } if (curr.e_idx < 0) { DUK_ASSERT(curr.a_idx < 0 && curr.e_idx < 0); goto fail_virtual; /* safeguard for virtual property */ } DUK_ASSERT(curr.e_idx >= 0); DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx)); tv1 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, curr.e_idx); DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ(thr, tv1); /* XXX: just decref */ DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, curr.e_idx, NULL); DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, curr.e_idx, NULL); DUK_HOBJECT_E_SLOT_CLEAR_WRITABLE(thr->heap, obj, curr.e_idx); DUK_HOBJECT_E_SLOT_SET_ACCESSOR(thr->heap, obj, curr.e_idx); DUK_DDD(DUK_DDDPRINT("flags after data->accessor conversion: 0x%02lx", (unsigned long) DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, curr.e_idx))); /* Update curr.flags; faster than a re-lookup. */ curr.flags &= ~DUK_PROPDESC_FLAG_WRITABLE; curr.flags |= DUK_PROPDESC_FLAG_ACCESSOR; } } else if (has_value || has_writable) { /* IsDataDescriptor(desc) == true */ DUK_ASSERT(!has_set); DUK_ASSERT(!has_get); if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) { duk_hobject *tmp; /* curr is accessor, desc is data */ if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) { goto fail_not_configurable; } /* curr is accessor -> cannot be in array part. */ DUK_ASSERT(curr.a_idx < 0); if (curr.e_idx < 0) { goto fail_virtual; /* safeguard; no virtual accessors now */ } DUK_DDD(DUK_DDDPRINT("convert property to data property")); DUK_ASSERT(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx)); tmp = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, obj, curr.e_idx); DUK_UNREF(tmp); DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, curr.e_idx, NULL); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, tmp); tmp = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, obj, curr.e_idx); DUK_UNREF(tmp); DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, curr.e_idx, NULL); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, tmp); DUK_TVAL_SET_UNDEFINED(DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, curr.e_idx)); DUK_HOBJECT_E_SLOT_CLEAR_WRITABLE(thr->heap, obj, curr.e_idx); DUK_HOBJECT_E_SLOT_CLEAR_ACCESSOR(thr->heap, obj, curr.e_idx); DUK_DDD(DUK_DDDPRINT("flags after accessor->data conversion: 0x%02lx", (unsigned long) DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, curr.e_idx))); /* Update curr.flags; faster than a re-lookup. */ curr.flags &= ~(DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_ACCESSOR); } else { /* curr and desc are data */ if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) { if (!(curr.flags & DUK_PROPDESC_FLAG_WRITABLE) && has_writable && is_writable) { goto fail_not_configurable; } /* Note: changing from writable to non-writable is OK */ if (!(curr.flags & DUK_PROPDESC_FLAG_WRITABLE) && has_value) { duk_tval *tmp1 = duk_require_tval(thr, -1); /* curr value */ duk_tval *tmp2 = duk_require_tval(thr, idx_value); /* new value */ if (!duk_js_samevalue(tmp1, tmp2)) { goto fail_not_configurable; } } } } } else { /* IsGenericDescriptor(desc) == true; this means in practice that 'desc' * only has [[Enumerable]] or [[Configurable]] flag updates, which are * allowed at this point. */ DUK_ASSERT(!has_value && !has_writable && !has_get && !has_set); } /* * Start doing property attributes updates. Steps 12-13. * * Start by computing new attribute flags without writing yet. * Property type conversion is done above if necessary. */ new_flags = curr.flags; if (has_enumerable) { if (is_enumerable) { new_flags |= DUK_PROPDESC_FLAG_ENUMERABLE; } else { new_flags &= ~DUK_PROPDESC_FLAG_ENUMERABLE; } } if (has_configurable) { if (is_configurable) { new_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE; } else { new_flags &= ~DUK_PROPDESC_FLAG_CONFIGURABLE; } } if (has_writable) { if (is_writable) { new_flags |= DUK_PROPDESC_FLAG_WRITABLE; } else { new_flags &= ~DUK_PROPDESC_FLAG_WRITABLE; } } /* XXX: write protect after flag? -> any chance of handling it here? */ DUK_DDD(DUK_DDDPRINT("new flags that we want to write: 0x%02lx", (unsigned long) new_flags)); /* * Check whether we need to abandon an array part (if it exists) */ if (curr.a_idx >= 0) { duk_bool_t rc; DUK_ASSERT(curr.e_idx < 0); if (new_flags == DUK_PROPDESC_FLAGS_WEC) { duk_tval *tv1, *tv2; DUK_DDD(DUK_DDDPRINT("array index, new property attributes match array defaults, update in-place")); DUK_ASSERT(curr.flags == DUK_PROPDESC_FLAGS_WEC); /* must have been, since in array part */ DUK_ASSERT(!has_set); DUK_ASSERT(!has_get); DUK_ASSERT(idx_value >= 0); /* must be: if attributes match and we get here the value must differ (otherwise no change) */ tv2 = duk_require_tval(thr, idx_value); tv1 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, curr.a_idx); DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects; may invalidate a_idx */ goto success_exotics; } DUK_DDD(DUK_DDDPRINT("array index, new property attributes do not match array defaults, abandon array and re-lookup")); duk__abandon_array_part(thr, obj); duk_pop_unsafe(thr); /* remove old value */ rc = duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &curr, DUK_GETDESC_FLAG_PUSH_VALUE); DUK_UNREF(rc); DUK_ASSERT(rc != 0); DUK_ASSERT(curr.e_idx >= 0 && curr.a_idx < 0); } DUK_DDD(DUK_DDDPRINT("updating existing property in entry part")); /* Array case is handled comprehensively above: either in entry * part or a virtual property. */ DUK_ASSERT(curr.a_idx < 0); DUK_DDD(DUK_DDDPRINT("update existing property attributes")); if (curr.e_idx >= 0) { DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, curr.e_idx, new_flags); } else { /* For Array .length the only allowed transition is for .length * to become non-writable. */ if (key == DUK_HTHREAD_STRING_LENGTH(thr) && DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)) { duk_harray *a; a = (duk_harray *) obj; DUK_DD(DUK_DDPRINT("Object.defineProperty() attribute update for duk_harray .length -> %02lx", (unsigned long) new_flags)); DUK_HARRAY_ASSERT_VALID(a); if ((new_flags & DUK_PROPDESC_FLAGS_EC) != (curr.flags & DUK_PROPDESC_FLAGS_EC)) { DUK_D(DUK_DPRINT("Object.defineProperty() attempt to change virtual array .length enumerable or configurable attribute, fail")); goto fail_virtual; } if (new_flags & DUK_PROPDESC_FLAG_WRITABLE) { DUK_HARRAY_SET_LENGTH_WRITABLE(a); } else { DUK_HARRAY_SET_LENGTH_NONWRITABLE(a); } } } if (has_set) { duk_hobject *tmp; /* Virtual properties are non-configurable but with a 'force' * flag we might come here so check explicitly for virtual. */ if (curr.e_idx < 0) { goto fail_virtual; } DUK_DDD(DUK_DDDPRINT("update existing property setter")); DUK_ASSERT(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx)); tmp = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, obj, curr.e_idx); DUK_UNREF(tmp); DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, curr.e_idx, set); DUK_HOBJECT_INCREF_ALLOWNULL(thr, set); DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); /* side effects; may invalidate e_idx */ } if (has_get) { duk_hobject *tmp; if (curr.e_idx < 0) { goto fail_virtual; } DUK_DDD(DUK_DDDPRINT("update existing property getter")); DUK_ASSERT(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx)); tmp = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, obj, curr.e_idx); DUK_UNREF(tmp); DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, curr.e_idx, get); DUK_HOBJECT_INCREF_ALLOWNULL(thr, get); DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); /* side effects; may invalidate e_idx */ } if (has_value) { duk_tval *tv1, *tv2; DUK_DDD(DUK_DDDPRINT("update existing property value")); if (curr.e_idx >= 0) { DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx)); tv2 = duk_require_tval(thr, idx_value); tv1 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, curr.e_idx); DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects; may invalidate e_idx */ } else { DUK_ASSERT(curr.a_idx < 0); /* array part case handled comprehensively previously */ DUK_DD(DUK_DDPRINT("Object.defineProperty(), value update for virtual property")); /* XXX: Uint8Array and other typed array virtual writes not currently * handled. */ if (key == DUK_HTHREAD_STRING_LENGTH(thr) && DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)) { duk_harray *a; a = (duk_harray *) obj; DUK_DD(DUK_DDPRINT("Object.defineProperty() value update for duk_harray .length -> %ld", (long) arrlen_new_len)); DUK_HARRAY_ASSERT_VALID(a); a->length = arrlen_new_len; } else { goto fail_virtual; /* should not happen */ } } } /* * Standard algorithm succeeded without errors, check for exotic post-behaviors. * * Arguments exotic behavior in E5 Section 10.6 occurs after the standard * [[DefineOwnProperty]] has completed successfully. * * Array exotic behavior in E5 Section 15.4.5.1 is implemented partly * prior to the default [[DefineOwnProperty]], but: * - for an array index key (e.g. "10") the final 'length' update occurs here * - for 'length' key the element deletion and 'length' update occurs here */ success_exotics: /* curr.a_idx or curr.e_idx may have been invalidated by side effects * above. */ /* [obj key desc value get set curr_value] */ if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)) { duk_harray *a; a = (duk_harray *) obj; DUK_HARRAY_ASSERT_VALID(a); if (arridx_new_array_length > 0) { /* * Note: zero works as a "no update" marker because the new length * can never be zero after a new property is written. */ /* E5 Section 15.4.5.1, steps 4.e.i - 4.e.ii */ DUK_DDD(DUK_DDDPRINT("defineProperty successful, pending array length update to: %ld", (long) arridx_new_array_length)); a->length = arridx_new_array_length; } if (key == DUK_HTHREAD_STRING_LENGTH(thr) && arrlen_new_len < arrlen_old_len) { /* * E5 Section 15.4.5.1, steps 3.k - 3.n. The order at the end combines * the error case 3.l.iii and the success case 3.m-3.n. */ /* XXX: investigate whether write protect can be handled above, if we * just update length here while ignoring its protected status */ duk_uint32_t result_len; duk_bool_t rc; DUK_DDD(DUK_DDDPRINT("defineProperty successful, key is 'length', exotic array behavior, " "doing array element deletion and length update")); rc = duk__handle_put_array_length_smaller(thr, obj, arrlen_old_len, arrlen_new_len, force_flag, &result_len); /* update length (curr points to length, and we assume it's still valid) */ DUK_ASSERT(result_len >= arrlen_new_len && result_len <= arrlen_old_len); a->length = result_len; if (pending_write_protect) { DUK_DDD(DUK_DDDPRINT("setting array length non-writable (pending writability update)")); DUK_HARRAY_SET_LENGTH_NONWRITABLE(a); } /* XXX: shrink array allocation or entries compaction here? */ if (!rc) { DUK_DD(DUK_DDPRINT("array length write only partially successful")); goto fail_not_configurable; } } } else if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj)) { duk_hobject *map; duk_hobject *varenv; DUK_ASSERT(arridx_new_array_length == 0); DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)); /* traits are separate; in particular, arguments not an array */ map = NULL; varenv = NULL; if (!duk__lookup_arguments_map(thr, obj, key, &curr, &map, &varenv)) { goto success_no_exotics; } DUK_ASSERT(map != NULL); DUK_ASSERT(varenv != NULL); /* [obj key desc value get set curr_value varname] */ if (has_set || has_get) { /* = IsAccessorDescriptor(Desc) */ DUK_DDD(DUK_DDDPRINT("defineProperty successful, key mapped to arguments 'map' " "changed to an accessor, delete arguments binding")); (void) duk_hobject_delprop_raw(thr, map, key, 0); /* ignore result */ } else { /* Note: this order matters (final value before deleting map entry must be done) */ DUK_DDD(DUK_DDDPRINT("defineProperty successful, key mapped to arguments 'map', " "check for value update / binding deletion")); if (has_value) { duk_hstring *varname; DUK_DDD(DUK_DDDPRINT("defineProperty successful, key mapped to arguments 'map', " "update bound value (variable/argument)")); varname = duk_require_hstring(thr, -1); DUK_ASSERT(varname != NULL); DUK_DDD(DUK_DDDPRINT("arguments object automatic putvar for a bound variable; " "key=%!O, varname=%!O, value=%!T", (duk_heaphdr *) key, (duk_heaphdr *) varname, (duk_tval *) duk_require_tval(thr, idx_value))); /* strict flag for putvar comes from our caller (currently: fixed) */ duk_js_putvar_envrec(thr, varenv, varname, duk_require_tval(thr, idx_value), 1 /*throw_flag*/); } if (has_writable && !is_writable) { DUK_DDD(DUK_DDDPRINT("defineProperty successful, key mapped to arguments 'map', " "changed to non-writable, delete arguments binding")); (void) duk_hobject_delprop_raw(thr, map, key, 0); /* ignore result */ } } /* 'varname' is in stack in this else branch, leaving an unbalanced stack below, * but this doesn't matter now. */ } success_no_exotics: /* Some code paths use NORZ macros for simplicity, ensure refzero * handling is completed. */ DUK_REFZERO_CHECK_SLOW(thr); return 1; fail_not_extensible: if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_EXTENSIBLE); DUK_WO_NORETURN(return 0;); } return 0; fail_virtual: /* just use the same "not configurable" error message" */ fail_not_configurable: if (throw_flag) { DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE); DUK_WO_NORETURN(return 0;); } return 0; } /* * Object.prototype.hasOwnProperty() and Object.prototype.propertyIsEnumerable(). */ DUK_INTERNAL duk_bool_t duk_hobject_object_ownprop_helper(duk_hthread *thr, duk_small_uint_t required_desc_flags) { duk_hstring *h_v; duk_hobject *h_obj; duk_propdesc desc; duk_bool_t ret; /* coercion order matters */ h_v = duk_to_hstring_acceptsymbol(thr, 0); DUK_ASSERT(h_v != NULL); h_obj = duk_push_this_coercible_to_object(thr); DUK_ASSERT(h_obj != NULL); ret = duk_hobject_get_own_propdesc(thr, h_obj, h_v, &desc, 0 /*flags*/); /* don't push value */ duk_push_boolean(thr, ret && ((desc.flags & required_desc_flags) == required_desc_flags)); return 1; } /* * Object.seal() and Object.freeze() (E5 Sections 15.2.3.8 and 15.2.3.9) * * Since the algorithms are similar, a helper provides both functions. * Freezing is essentially sealing + making plain properties non-writable. * * Note: virtual (non-concrete) properties which are non-configurable but * writable would pose some problems, but such properties do not currently * exist (all virtual properties are non-configurable and non-writable). * If they did exist, the non-configurability does NOT prevent them from * becoming non-writable. However, this change should be recorded somehow * so that it would turn up (e.g. when getting the property descriptor), * requiring some additional flags in the object. */ DUK_INTERNAL void duk_hobject_object_seal_freeze_helper(duk_hthread *thr, duk_hobject *obj, duk_bool_t is_freeze) { duk_uint_fast32_t i; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(obj != NULL); DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE); #if defined(DUK_USE_ROM_OBJECTS) if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) { DUK_DD(DUK_DDPRINT("attempt to seal/freeze a readonly object, reject")); DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE); DUK_WO_NORETURN(return;); } #endif /* * Abandon array part because all properties must become non-configurable. * Note that this is now done regardless of whether this is always the case * (skips check, but performance problem if caller would do this many times * for the same object; not likely). */ duk__abandon_array_part(thr, obj); DUK_ASSERT(DUK_HOBJECT_GET_ASIZE(obj) == 0); for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) { duk_uint8_t *fp; /* since duk__abandon_array_part() causes a resize, there should be no gaps in keys */ DUK_ASSERT(DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i) != NULL); /* avoid multiple computations of flags address; bypasses macros */ fp = DUK_HOBJECT_E_GET_FLAGS_PTR(thr->heap, obj, i); if (is_freeze && !((*fp) & DUK_PROPDESC_FLAG_ACCESSOR)) { *fp &= ~(DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_CONFIGURABLE); } else { *fp &= ~DUK_PROPDESC_FLAG_CONFIGURABLE; } } DUK_HOBJECT_CLEAR_EXTENSIBLE(obj); /* no need to compact since we already did that in duk__abandon_array_part() * (regardless of whether an array part existed or not. */ return; } /* * Object.isSealed() and Object.isFrozen() (E5 Sections 15.2.3.11, 15.2.3.13) * * Since the algorithms are similar, a helper provides both functions. * Freezing is essentially sealing + making plain properties non-writable. * * Note: all virtual (non-concrete) properties are currently non-configurable * and non-writable (and there are no accessor virtual properties), so they don't * need to be considered here now. */ DUK_INTERNAL duk_bool_t duk_hobject_object_is_sealed_frozen_helper(duk_hthread *thr, duk_hobject *obj, duk_bool_t is_frozen) { duk_uint_fast32_t i; DUK_ASSERT(obj != NULL); DUK_UNREF(thr); /* Note: no allocation pressure, no need to check refcounts etc */ /* must not be extensible */ if (DUK_HOBJECT_HAS_EXTENSIBLE(obj)) { return 0; } /* all virtual properties are non-configurable and non-writable */ /* entry part must not contain any configurable properties, or * writable properties (if is_frozen). */ for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) { duk_small_uint_t flags; if (!DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i)) { continue; } /* avoid multiple computations of flags address; bypasses macros */ flags = (duk_small_uint_t) DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, i); if (flags & DUK_PROPDESC_FLAG_CONFIGURABLE) { return 0; } if (is_frozen && !(flags & DUK_PROPDESC_FLAG_ACCESSOR) && (flags & DUK_PROPDESC_FLAG_WRITABLE)) { return 0; } } /* array part must not contain any non-unused properties, as they would * be configurable and writable. */ for (i = 0; i < DUK_HOBJECT_GET_ASIZE(obj); i++) { duk_tval *tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, i); if (!DUK_TVAL_IS_UNUSED(tv)) { return 0; } } return 1; } /* * Object.preventExtensions() and Object.isExtensible() (E5 Sections 15.2.3.10, 15.2.3.13) * * Not needed, implemented by macros DUK_HOBJECT_{HAS,CLEAR,SET}_EXTENSIBLE * and the Object built-in bindings. */ /* automatic undefs */ #undef DUK__HASH_DELETED #undef DUK__HASH_UNUSED #undef DUK__NO_ARRAY_INDEX #undef DUK__VALSTACK_PROXY_LOOKUP #undef DUK__VALSTACK_SPACE /* * duk_hstring assertion helpers. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL void duk_hstring_assert_valid(duk_hstring *h) { DUK_ASSERT(h != NULL); } #endif /* DUK_USE_ASSERTIONS */ /* * Misc support functions */ /* #include duk_internal.h -> already included */ /* * duk_hstring charCodeAt, with and without surrogate awareness */ DUK_INTERNAL duk_ucodepoint_t duk_hstring_char_code_at_raw(duk_hthread *thr, duk_hstring *h, duk_uint_t pos, duk_bool_t surrogate_aware) { duk_uint32_t boff; const duk_uint8_t *p, *p_start, *p_end; duk_ucodepoint_t cp1; duk_ucodepoint_t cp2; /* Caller must check character offset to be inside the string. */ DUK_ASSERT(thr != NULL); DUK_ASSERT(h != NULL); DUK_ASSERT_DISABLE(pos >= 0); /* unsigned */ DUK_ASSERT(pos < (duk_uint_t) DUK_HSTRING_GET_CHARLEN(h)); boff = (duk_uint32_t) duk_heap_strcache_offset_char2byte(thr, h, (duk_uint32_t) pos); DUK_DDD(DUK_DDDPRINT("charCodeAt: pos=%ld -> boff=%ld, str=%!O", (long) pos, (long) boff, (duk_heaphdr *) h)); DUK_ASSERT_DISABLE(boff >= 0); DUK_ASSERT(boff < DUK_HSTRING_GET_BYTELEN(h)); p_start = DUK_HSTRING_GET_DATA(h); p_end = p_start + DUK_HSTRING_GET_BYTELEN(h); p = p_start + boff; DUK_DDD(DUK_DDDPRINT("p_start=%p, p_end=%p, p=%p", (const void *) p_start, (const void *) p_end, (const void *) p)); /* For invalid UTF-8 (never happens for standard ECMAScript strings) * return U+FFFD replacement character. */ if (duk_unicode_decode_xutf8(thr, &p, p_start, p_end, &cp1)) { if (surrogate_aware && cp1 >= 0xd800UL && cp1 <= 0xdbffUL) { /* The decode helper is memory safe even if 'cp1' was * decoded at the end of the string and 'p' is no longer * within string memory range. */ cp2 = 0; /* If call fails, this is left untouched and won't match cp2 check. */ (void) duk_unicode_decode_xutf8(thr, &p, p_start, p_end, &cp2); if (cp2 >= 0xdc00UL && cp2 <= 0xdfffUL) { cp1 = (duk_ucodepoint_t) (((cp1 - 0xd800UL) << 10) + (cp2 - 0xdc00UL) + 0x10000UL); } } } else { cp1 = DUK_UNICODE_CP_REPLACEMENT_CHARACTER; } return cp1; } /* * duk_hstring charlen, when lazy charlen disabled */ #if !defined(DUK_USE_HSTRING_LAZY_CLEN) #if !defined(DUK_USE_HSTRING_CLEN) #error non-lazy duk_hstring charlen but DUK_USE_HSTRING_CLEN not set #endif DUK_INTERNAL void duk_hstring_init_charlen(duk_hstring *h) { duk_uint32_t clen; DUK_ASSERT(h != NULL); DUK_ASSERT(!DUK_HSTRING_HAS_ASCII(h)); DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) h)); clen = duk_unicode_unvalidated_utf8_length(DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h)); #if defined(DUK_USE_STRLEN16) DUK_ASSERT(clen <= 0xffffUL); /* Bytelength checked during interning. */ h->clen16 = (duk_uint16_t) clen; #else h->clen = (duk_uint32_t) clen; #endif if (DUK_LIKELY(clen == DUK_HSTRING_GET_BYTELEN(h))) { DUK_HSTRING_SET_ASCII(h); } } DUK_INTERNAL DUK_HOT duk_size_t duk_hstring_get_charlen(duk_hstring *h) { #if defined(DUK_USE_STRLEN16) return h->clen16; #else return h->clen; #endif } #endif /* !DUK_USE_HSTRING_LAZY_CLEN */ /* * duk_hstring charlen, when lazy charlen enabled */ #if defined(DUK_USE_HSTRING_LAZY_CLEN) #if defined(DUK_USE_HSTRING_CLEN) DUK_LOCAL DUK_COLD duk_size_t duk__hstring_get_charlen_slowpath(duk_hstring *h) { duk_size_t res; DUK_ASSERT(h->clen == 0); /* Checked by caller. */ #if defined(DUK_USE_ROM_STRINGS) /* ROM strings have precomputed clen, but if the computed clen is zero * we can still come here and can't write anything. */ if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) h)) { return 0; } #endif res = duk_unicode_unvalidated_utf8_length(DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h)); #if defined(DUK_USE_STRLEN16) DUK_ASSERT(res <= 0xffffUL); /* Bytelength checked during interning. */ h->clen16 = (duk_uint16_t) res; #else h->clen = (duk_uint32_t) res; #endif if (DUK_LIKELY(res == DUK_HSTRING_GET_BYTELEN(h))) { DUK_HSTRING_SET_ASCII(h); } return res; } #else /* DUK_USE_HSTRING_CLEN */ DUK_LOCAL duk_size_t duk__hstring_get_charlen_slowpath(duk_hstring *h) { if (DUK_LIKELY(DUK_HSTRING_HAS_ASCII(h))) { /* Most practical strings will go here. */ return DUK_HSTRING_GET_BYTELEN(h); } else { /* ASCII flag is lazy, so set it here. */ duk_size_t res; /* XXX: here we could use the strcache to speed up the * computation (matters for 'i < str.length' loops). */ res = duk_unicode_unvalidated_utf8_length(DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h)); #if defined(DUK_USE_ROM_STRINGS) if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) h)) { /* For ROM strings, can't write anything; ASCII flag * is preset so we don't need to update it. */ return res; } #endif if (DUK_LIKELY(res == DUK_HSTRING_GET_BYTELEN(h))) { DUK_HSTRING_SET_ASCII(h); } return res; } } #endif /* DUK_USE_HSTRING_CLEN */ #if defined(DUK_USE_HSTRING_CLEN) DUK_INTERNAL DUK_HOT duk_size_t duk_hstring_get_charlen(duk_hstring *h) { #if defined(DUK_USE_STRLEN16) if (DUK_LIKELY(h->clen16 != 0)) { return h->clen16; } #else if (DUK_LIKELY(h->clen != 0)) { return h->clen; } #endif return duk__hstring_get_charlen_slowpath(h); } #else /* DUK_USE_HSTRING_CLEN */ DUK_INTERNAL DUK_HOT duk_size_t duk_hstring_get_charlen(duk_hstring *h) { /* Always use slow path. */ return duk__hstring_get_charlen_slowpath(h); } #endif /* DUK_USE_HSTRING_CLEN */ #endif /* DUK_USE_HSTRING_LAZY_CLEN */ /* * Compare duk_hstring to an ASCII cstring. */ DUK_INTERNAL duk_bool_t duk_hstring_equals_ascii_cstring(duk_hstring *h, const char *cstr) { duk_size_t len; DUK_ASSERT(h != NULL); DUK_ASSERT(cstr != NULL); len = DUK_STRLEN(cstr); if (len != DUK_HSTRING_GET_BYTELEN(h)) { return 0; } if (duk_memcmp((const void *) cstr, (const void *) DUK_HSTRING_GET_DATA(h), len) == 0) { return 1; } return 0; } /* * duk_hthread allocation and freeing. */ /* #include duk_internal.h -> already included */ /* * Allocate initial stacks for a thread. Note that 'thr' must be reachable * as a garbage collection may be triggered by the allocation attempts. * Returns zero (without leaking memory) if init fails. */ DUK_INTERNAL duk_bool_t duk_hthread_init_stacks(duk_heap *heap, duk_hthread *thr) { duk_size_t alloc_size; duk_size_t i; DUK_ASSERT(heap != NULL); DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->valstack == NULL); DUK_ASSERT(thr->valstack_end == NULL); DUK_ASSERT(thr->valstack_alloc_end == NULL); DUK_ASSERT(thr->valstack_bottom == NULL); DUK_ASSERT(thr->valstack_top == NULL); DUK_ASSERT(thr->callstack_curr == NULL); /* valstack */ DUK_ASSERT(DUK_VALSTACK_API_ENTRY_MINIMUM <= DUK_VALSTACK_INITIAL_SIZE); alloc_size = sizeof(duk_tval) * DUK_VALSTACK_INITIAL_SIZE; thr->valstack = (duk_tval *) DUK_ALLOC(heap, alloc_size); if (!thr->valstack) { goto fail; } duk_memzero(thr->valstack, alloc_size); thr->valstack_end = thr->valstack + DUK_VALSTACK_API_ENTRY_MINIMUM; thr->valstack_alloc_end = thr->valstack + DUK_VALSTACK_INITIAL_SIZE; thr->valstack_bottom = thr->valstack; thr->valstack_top = thr->valstack; for (i = 0; i < DUK_VALSTACK_INITIAL_SIZE; i++) { DUK_TVAL_SET_UNDEFINED(&thr->valstack[i]); } return 1; fail: DUK_FREE(heap, thr->valstack); DUK_ASSERT(thr->callstack_curr == NULL); thr->valstack = NULL; return 0; } /* For indirect allocs. */ DUK_INTERNAL void *duk_hthread_get_valstack_ptr(duk_heap *heap, void *ud) { duk_hthread *thr = (duk_hthread *) ud; DUK_UNREF(heap); return (void *) thr->valstack; } /* * Initialize built-in objects. Current thread must have a valstack * and initialization errors may longjmp, so a setjmp() catch point * must exist. */ /* #include duk_internal.h -> already included */ /* * Encoding constants, must match genbuiltins.py */ #define DUK__PROP_FLAGS_BITS 3 #define DUK__LENGTH_PROP_BITS 3 #define DUK__NARGS_BITS 3 #define DUK__PROP_TYPE_BITS 3 #define DUK__NARGS_VARARGS_MARKER 0x07 #define DUK__PROP_TYPE_DOUBLE 0 #define DUK__PROP_TYPE_STRING 1 #define DUK__PROP_TYPE_STRIDX 2 #define DUK__PROP_TYPE_BUILTIN 3 #define DUK__PROP_TYPE_UNDEFINED 4 #define DUK__PROP_TYPE_BOOLEAN_TRUE 5 #define DUK__PROP_TYPE_BOOLEAN_FALSE 6 #define DUK__PROP_TYPE_ACCESSOR 7 /* * Create built-in objects by parsing an init bitstream generated * by genbuiltins.py. */ #if defined(DUK_USE_ROM_OBJECTS) #if defined(DUK_USE_ROM_GLOBAL_CLONE) || defined(DUK_USE_ROM_GLOBAL_INHERIT) DUK_LOCAL void duk__duplicate_ram_global_object(duk_hthread *thr) { duk_hobject *h_global; #if defined(DUK_USE_ROM_GLOBAL_CLONE) duk_hobject *h_oldglobal; duk_uint8_t *props; duk_size_t alloc_size; #endif duk_hobject *h_objenv; /* XXX: refactor into internal helper, duk_clone_hobject() */ #if defined(DUK_USE_ROM_GLOBAL_INHERIT) /* Inherit from ROM-based global object: less RAM usage, less transparent. */ h_global = duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_GLOBAL), DUK_BIDX_GLOBAL); DUK_ASSERT(h_global != NULL); #elif defined(DUK_USE_ROM_GLOBAL_CLONE) /* Clone the properties of the ROM-based global object to create a * fully RAM-based global object. Uses more memory than the inherit * model but more compliant. */ h_global = duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_GLOBAL), DUK_BIDX_OBJECT_PROTOTYPE); DUK_ASSERT(h_global != NULL); h_oldglobal = thr->builtins[DUK_BIDX_GLOBAL]; DUK_ASSERT(h_oldglobal != NULL); /* Copy the property table verbatim; this handles attributes etc. * For ROM objects it's not necessary (or possible) to update * refcounts so leave them as is. */ alloc_size = DUK_HOBJECT_P_ALLOC_SIZE(h_oldglobal); DUK_ASSERT(alloc_size > 0); props = DUK_ALLOC_CHECKED(thr, alloc_size); DUK_ASSERT(props != NULL); DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, h_oldglobal) != NULL); duk_memcpy((void *) props, (const void *) DUK_HOBJECT_GET_PROPS(thr->heap, h_oldglobal), alloc_size); /* XXX: keep property attributes or tweak them here? * Properties will now be non-configurable even when they're * normally configurable for the global object. */ DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, h_global) == NULL); DUK_HOBJECT_SET_PROPS(thr->heap, h_global, props); DUK_HOBJECT_SET_ESIZE(h_global, DUK_HOBJECT_GET_ESIZE(h_oldglobal)); DUK_HOBJECT_SET_ENEXT(h_global, DUK_HOBJECT_GET_ENEXT(h_oldglobal)); DUK_HOBJECT_SET_ASIZE(h_global, DUK_HOBJECT_GET_ASIZE(h_oldglobal)); DUK_HOBJECT_SET_HSIZE(h_global, DUK_HOBJECT_GET_HSIZE(h_oldglobal)); #else #error internal error in config defines #endif duk_hobject_compact_props(thr, h_global); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL); DUK_ASSERT(!DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE((duk_heaphdr *) thr->builtins[DUK_BIDX_GLOBAL])); /* no need to decref: ROM object */ thr->builtins[DUK_BIDX_GLOBAL] = h_global; DUK_HOBJECT_INCREF(thr, h_global); DUK_D(DUK_DPRINT("duplicated global object: %!O", h_global)); /* Create a fresh object environment for the global scope. This is * needed so that the global scope points to the newly created RAM-based * global object. */ h_objenv = (duk_hobject *) duk_hobjenv_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJENV)); DUK_ASSERT(h_objenv != NULL); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_objenv) == NULL); duk_push_hobject(thr, h_objenv); DUK_ASSERT(h_global != NULL); ((duk_hobjenv *) h_objenv)->target = h_global; DUK_HOBJECT_INCREF(thr, h_global); DUK_ASSERT(((duk_hobjenv *) h_objenv)->has_this == 0); DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL_ENV] != NULL); DUK_ASSERT(!DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE((duk_heaphdr *) thr->builtins[DUK_BIDX_GLOBAL_ENV])); /* no need to decref: ROM object */ thr->builtins[DUK_BIDX_GLOBAL_ENV] = h_objenv; DUK_HOBJECT_INCREF(thr, h_objenv); DUK_D(DUK_DPRINT("duplicated global env: %!O", h_objenv)); DUK_HOBJENV_ASSERT_VALID((duk_hobjenv *) h_objenv); duk_pop_2(thr); /* Pop global object and global env. */ } #endif /* DUK_USE_ROM_GLOBAL_CLONE || DUK_USE_ROM_GLOBAL_INHERIT */ DUK_INTERNAL void duk_hthread_create_builtin_objects(duk_hthread *thr) { /* Setup builtins from ROM objects. All heaps/threads will share * the same readonly objects. */ duk_small_uint_t i; for (i = 0; i < DUK_NUM_BUILTINS; i++) { duk_hobject *h; h = (duk_hobject *) DUK_LOSE_CONST(duk_rom_builtins_bidx[i]); DUK_ASSERT(h != NULL); thr->builtins[i] = h; } #if defined(DUK_USE_ROM_GLOBAL_CLONE) || defined(DUK_USE_ROM_GLOBAL_INHERIT) /* By default the global object is read-only which is often much * more of an issue than having read-only built-in objects (like * RegExp, Date, etc). Use a RAM-based copy of the global object * and the global environment object for convenience. */ duk__duplicate_ram_global_object(thr); #endif } #else /* DUK_USE_ROM_OBJECTS */ DUK_LOCAL void duk__push_stridx(duk_hthread *thr, duk_bitdecoder_ctx *bd) { duk_small_uint_t n; n = (duk_small_uint_t) duk_bd_decode_varuint(bd); DUK_ASSERT_DISABLE(n >= 0); /* unsigned */ DUK_ASSERT(n < DUK_HEAP_NUM_STRINGS); duk_push_hstring_stridx(thr, n); } DUK_LOCAL void duk__push_string(duk_hthread *thr, duk_bitdecoder_ctx *bd) { /* XXX: built-ins data could provide a maximum length that is * actually needed; bitpacked max length is now 256 bytes. */ duk_uint8_t tmp[DUK_BD_BITPACKED_STRING_MAXLEN]; duk_small_uint_t len; len = duk_bd_decode_bitpacked_string(bd, tmp); duk_push_lstring(thr, (const char *) tmp, (duk_size_t) len); } DUK_LOCAL void duk__push_stridx_or_string(duk_hthread *thr, duk_bitdecoder_ctx *bd) { duk_small_uint_t n; n = (duk_small_uint_t) duk_bd_decode_varuint(bd); if (n == 0) { duk__push_string(thr, bd); } else { n--; DUK_ASSERT(n < DUK_HEAP_NUM_STRINGS); duk_push_hstring_stridx(thr, n); } } DUK_LOCAL void duk__push_double(duk_hthread *thr, duk_bitdecoder_ctx *bd) { duk_double_union du; duk_small_uint_t i; for (i = 0; i < 8; i++) { /* Encoding endianness must match target memory layout, * build scripts and genbuiltins.py must ensure this. */ du.uc[i] = (duk_uint8_t) duk_bd_decode(bd, 8); } duk_push_number(thr, du.d); /* push operation normalizes NaNs */ } DUK_INTERNAL void duk_hthread_create_builtin_objects(duk_hthread *thr) { duk_bitdecoder_ctx bd_ctx; duk_bitdecoder_ctx *bd = &bd_ctx; /* convenience */ duk_hobject *h; duk_small_uint_t i, j; DUK_D(DUK_DPRINT("INITBUILTINS BEGIN: DUK_NUM_BUILTINS=%d, DUK_NUM_BUILTINS_ALL=%d", (int) DUK_NUM_BUILTINS, (int) DUK_NUM_ALL_BUILTINS)); duk_memzero(&bd_ctx, sizeof(bd_ctx)); bd->data = (const duk_uint8_t *) duk_builtins_data; bd->length = (duk_size_t) DUK_BUILTINS_DATA_LENGTH; /* * First create all built-in bare objects on the empty valstack. * * Built-ins in the index range [0,DUK_NUM_BUILTINS-1] have value * stack indices matching their eventual thr->builtins[] index. * * Built-ins in the index range [DUK_NUM_BUILTINS,DUK_NUM_ALL_BUILTINS] * will exist on the value stack during init but won't be placed * into thr->builtins[]. These are objects referenced in some way * from thr->builtins[] roots but which don't need to be indexed by * Duktape through thr->builtins[] (e.g. user custom objects). * * Internal prototypes will be incorrect (NULL) at this stage. */ duk_require_stack(thr, DUK_NUM_ALL_BUILTINS); DUK_DD(DUK_DDPRINT("create empty built-ins")); DUK_ASSERT_TOP(thr, 0); for (i = 0; i < DUK_NUM_ALL_BUILTINS; i++) { duk_small_uint_t class_num; duk_small_int_t len = -1; /* must be signed */ class_num = (duk_small_uint_t) duk_bd_decode_varuint(bd); len = (duk_small_int_t) duk_bd_decode_flagged_signed(bd, DUK__LENGTH_PROP_BITS, (duk_int32_t) -1 /*def_value*/); if (class_num == DUK_HOBJECT_CLASS_FUNCTION) { duk_small_uint_t natidx; duk_small_int_t c_nargs; /* must hold DUK_VARARGS */ duk_c_function c_func; duk_int16_t magic; DUK_DDD(DUK_DDDPRINT("len=%ld", (long) len)); DUK_ASSERT(len >= 0); natidx = (duk_small_uint_t) duk_bd_decode_varuint(bd); DUK_ASSERT(natidx != 0); c_func = duk_bi_native_functions[natidx]; DUK_ASSERT(c_func != NULL); c_nargs = (duk_small_int_t) duk_bd_decode_flagged_signed(bd, DUK__NARGS_BITS, len /*def_value*/); if (c_nargs == DUK__NARGS_VARARGS_MARKER) { c_nargs = DUK_VARARGS; } /* XXX: set magic directly here? (it could share the c_nargs arg) */ (void) duk_push_c_function_builtin(thr, c_func, c_nargs); h = duk_known_hobject(thr, -1); /* Currently all built-in native functions are strict. * duk_push_c_function() now sets strict flag, so * assert for it. */ DUK_ASSERT(DUK_HOBJECT_HAS_STRICT(h)); /* XXX: function properties */ duk__push_stridx_or_string(thr, bd); #if defined(DUK_USE_FUNC_NAME_PROPERTY) duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_C); #else duk_pop(thr); /* Not very ideal but good enough for now. */ #endif /* Almost all global level Function objects are constructable * but not all: Function.prototype is a non-constructable, * callable Function. */ if (duk_bd_decode_flag(bd)) { DUK_ASSERT(DUK_HOBJECT_HAS_CONSTRUCTABLE(h)); } else { DUK_HOBJECT_CLEAR_CONSTRUCTABLE(h); } /* Cast converts magic to 16-bit signed value */ magic = (duk_int16_t) duk_bd_decode_varuint(bd); ((duk_hnatfunc *) h)->magic = magic; } else if (class_num == DUK_HOBJECT_CLASS_ARRAY) { duk_push_array(thr); } else if (class_num == DUK_HOBJECT_CLASS_OBJENV) { duk_hobjenv *env; duk_hobject *global; DUK_ASSERT(i == DUK_BIDX_GLOBAL_ENV); DUK_ASSERT(DUK_BIDX_GLOBAL_ENV > DUK_BIDX_GLOBAL); env = duk_hobjenv_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJENV)); DUK_ASSERT(env->target == NULL); duk_push_hobject(thr, (duk_hobject *) env); global = duk_known_hobject(thr, DUK_BIDX_GLOBAL); DUK_ASSERT(global != NULL); env->target = global; DUK_HOBJECT_INCREF(thr, global); DUK_ASSERT(env->has_this == 0); DUK_HOBJENV_ASSERT_VALID(env); } else { DUK_ASSERT(class_num != DUK_HOBJECT_CLASS_DECENV); (void) duk_push_object_helper(thr, DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_EXTENSIBLE, -1); /* no prototype or class yet */ } h = duk_known_hobject(thr, -1); DUK_HOBJECT_SET_CLASS_NUMBER(h, class_num); if (i < DUK_NUM_BUILTINS) { thr->builtins[i] = h; DUK_HOBJECT_INCREF(thr, &h->hdr); } if (len >= 0) { /* In ES2015+ built-in function object .length property * has property attributes C (configurable only): * http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-standard-built-in-objects * * Array.prototype remains an Array instance in ES2015+ * and its length has attributes W (writable only). * Because .length is now virtual for duk_harray, it is * not encoded explicitly in init data. */ DUK_ASSERT(class_num != DUK_HOBJECT_CLASS_ARRAY); /* .length is virtual */ duk_push_int(thr, len); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_C); } /* enable exotic behaviors last */ if (class_num == DUK_HOBJECT_CLASS_ARRAY) { DUK_ASSERT(DUK_HOBJECT_HAS_EXOTIC_ARRAY(h)); /* set by duk_push_array() */ } if (class_num == DUK_HOBJECT_CLASS_STRING) { DUK_HOBJECT_SET_EXOTIC_STRINGOBJ(h); } /* some assertions */ DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h)); /* DUK_HOBJECT_FLAG_CONSTRUCTABLE varies */ DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(h)); DUK_ASSERT(!DUK_HOBJECT_HAS_COMPFUNC(h)); /* DUK_HOBJECT_FLAG_NATFUNC varies */ DUK_ASSERT(!DUK_HOBJECT_IS_THREAD(h)); DUK_ASSERT(!DUK_HOBJECT_IS_PROXY(h)); DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(h) || class_num == DUK_HOBJECT_CLASS_ARRAY); /* DUK_HOBJECT_FLAG_STRICT varies */ DUK_ASSERT(!DUK_HOBJECT_HAS_NATFUNC(h) || /* all native functions have NEWENV */ DUK_HOBJECT_HAS_NEWENV(h)); DUK_ASSERT(!DUK_HOBJECT_HAS_NAMEBINDING(h)); DUK_ASSERT(!DUK_HOBJECT_HAS_CREATEARGS(h)); /* DUK_HOBJECT_FLAG_EXOTIC_ARRAY varies */ /* DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ varies */ DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h)); DUK_DDD(DUK_DDDPRINT("created built-in %ld, class=%ld, length=%ld", (long) i, (long) class_num, (long) len)); } /* * Then decode the builtins init data (see genbuiltins.py) to * init objects. Internal prototypes are set at this stage, * with thr->builtins[] populated. */ DUK_DD(DUK_DDPRINT("initialize built-in object properties")); for (i = 0; i < DUK_NUM_ALL_BUILTINS; i++) { duk_small_uint_t t; duk_small_uint_t num; DUK_DDD(DUK_DDDPRINT("initializing built-in object at index %ld", (long) i)); h = duk_known_hobject(thr, (duk_idx_t) i); t = (duk_small_uint_t) duk_bd_decode_varuint(bd); if (t > 0) { t--; DUK_DDD(DUK_DDDPRINT("set internal prototype: built-in %ld", (long) t)); DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h, duk_known_hobject(thr, (duk_idx_t) t)); } else if (DUK_HOBJECT_IS_NATFUNC(h)) { /* Standard native built-ins cannot inherit from * %NativeFunctionPrototype%, they are required to * inherit from Function.prototype directly. */ DUK_ASSERT(thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE] != NULL); DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h, thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); } t = (duk_small_uint_t) duk_bd_decode_varuint(bd); if (t > 0) { /* 'prototype' property for all built-in objects (which have it) has attributes: * [[Writable]] = false, * [[Enumerable]] = false, * [[Configurable]] = false */ t--; DUK_DDD(DUK_DDDPRINT("set external prototype: built-in %ld", (long) t)); duk_dup(thr, (duk_idx_t) t); duk_xdef_prop_stridx(thr, (duk_idx_t) i, DUK_STRIDX_PROTOTYPE, DUK_PROPDESC_FLAGS_NONE); } t = (duk_small_uint_t) duk_bd_decode_varuint(bd); if (t > 0) { /* 'constructor' property for all built-in objects (which have it) has attributes: * [[Writable]] = true, * [[Enumerable]] = false, * [[Configurable]] = true */ t--; DUK_DDD(DUK_DDDPRINT("set external constructor: built-in %ld", (long) t)); duk_dup(thr, (duk_idx_t) t); duk_xdef_prop_stridx(thr, (duk_idx_t) i, DUK_STRIDX_CONSTRUCTOR, DUK_PROPDESC_FLAGS_WC); } /* normal valued properties */ num = (duk_small_uint_t) duk_bd_decode_varuint(bd); DUK_DDD(DUK_DDDPRINT("built-in object %ld, %ld normal valued properties", (long) i, (long) num)); for (j = 0; j < num; j++) { duk_small_uint_t defprop_flags; duk__push_stridx_or_string(thr, bd); /* * Property attribute defaults are defined in E5 Section 15 (first * few pages); there is a default for all properties and a special * default for 'length' properties. Variation from the defaults is * signaled using a single flag bit in the bitstream. */ defprop_flags = (duk_small_uint_t) duk_bd_decode_flagged(bd, DUK__PROP_FLAGS_BITS, (duk_uint32_t) DUK_PROPDESC_FLAGS_WC); defprop_flags |= DUK_DEFPROP_FORCE | DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_HAVE_WRITABLE | DUK_DEFPROP_HAVE_ENUMERABLE | DUK_DEFPROP_HAVE_CONFIGURABLE; /* Defaults for data properties. */ /* The writable, enumerable, configurable flags in prop_flags * match both duk_def_prop() and internal property flags. */ DUK_ASSERT(DUK_PROPDESC_FLAG_WRITABLE == DUK_DEFPROP_WRITABLE); DUK_ASSERT(DUK_PROPDESC_FLAG_ENUMERABLE == DUK_DEFPROP_ENUMERABLE); DUK_ASSERT(DUK_PROPDESC_FLAG_CONFIGURABLE == DUK_DEFPROP_CONFIGURABLE); t = (duk_small_uint_t) duk_bd_decode(bd, DUK__PROP_TYPE_BITS); DUK_DDD(DUK_DDDPRINT("built-in %ld, normal-valued property %ld, key %!T, flags 0x%02lx, type %ld", (long) i, (long) j, duk_get_tval(thr, -1), (unsigned long) defprop_flags, (long) t)); switch (t) { case DUK__PROP_TYPE_DOUBLE: { duk__push_double(thr, bd); break; } case DUK__PROP_TYPE_STRING: { duk__push_string(thr, bd); break; } case DUK__PROP_TYPE_STRIDX: { duk__push_stridx(thr, bd); break; } case DUK__PROP_TYPE_BUILTIN: { duk_small_uint_t bidx; bidx = (duk_small_uint_t) duk_bd_decode_varuint(bd); duk_dup(thr, (duk_idx_t) bidx); break; } case DUK__PROP_TYPE_UNDEFINED: { duk_push_undefined(thr); break; } case DUK__PROP_TYPE_BOOLEAN_TRUE: { duk_push_true(thr); break; } case DUK__PROP_TYPE_BOOLEAN_FALSE: { duk_push_false(thr); break; } case DUK__PROP_TYPE_ACCESSOR: { duk_small_uint_t natidx_getter = (duk_small_uint_t) duk_bd_decode_varuint(bd); duk_small_uint_t natidx_setter = (duk_small_uint_t) duk_bd_decode_varuint(bd); duk_small_uint_t accessor_magic = (duk_small_uint_t) duk_bd_decode_varuint(bd); duk_c_function c_func_getter; duk_c_function c_func_setter; DUK_DDD(DUK_DDDPRINT("built-in accessor property: objidx=%ld, key=%!T, getteridx=%ld, setteridx=%ld, flags=0x%04lx", (long) i, duk_get_tval(thr, -1), (long) natidx_getter, (long) natidx_setter, (unsigned long) defprop_flags)); c_func_getter = duk_bi_native_functions[natidx_getter]; if (c_func_getter != NULL) { duk_push_c_function_builtin_noconstruct(thr, c_func_getter, 0); /* always 0 args */ duk_set_magic(thr, -1, (duk_int_t) accessor_magic); defprop_flags |= DUK_DEFPROP_HAVE_GETTER; } c_func_setter = duk_bi_native_functions[natidx_setter]; if (c_func_setter != NULL) { duk_push_c_function_builtin_noconstruct(thr, c_func_setter, 1); /* always 1 arg */ duk_set_magic(thr, -1, (duk_int_t) accessor_magic); defprop_flags |= DUK_DEFPROP_HAVE_SETTER; } /* Writable flag doesn't make sense for an accessor. */ DUK_ASSERT((defprop_flags & DUK_PROPDESC_FLAG_WRITABLE) == 0); /* genbuiltins.py ensures */ defprop_flags &= ~(DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_HAVE_WRITABLE); defprop_flags |= DUK_DEFPROP_HAVE_ENUMERABLE | DUK_DEFPROP_HAVE_CONFIGURABLE; break; } default: { /* exhaustive */ DUK_UNREACHABLE(); } } duk_def_prop(thr, (duk_idx_t) i, defprop_flags); DUK_ASSERT_TOP(thr, DUK_NUM_ALL_BUILTINS); } /* native function properties */ num = (duk_small_uint_t) duk_bd_decode_varuint(bd); DUK_DDD(DUK_DDDPRINT("built-in object %ld, %ld function valued properties", (long) i, (long) num)); for (j = 0; j < num; j++) { duk_hstring *h_key; duk_small_uint_t natidx; duk_int_t c_nargs; /* must hold DUK_VARARGS */ duk_small_uint_t c_length; duk_int16_t magic; duk_c_function c_func; duk_hnatfunc *h_func; #if defined(DUK_USE_LIGHTFUNC_BUILTINS) duk_small_int_t lightfunc_eligible; #endif duk_small_uint_t defprop_flags; duk__push_stridx_or_string(thr, bd); h_key = duk_known_hstring(thr, -1); DUK_UNREF(h_key); natidx = (duk_small_uint_t) duk_bd_decode_varuint(bd); c_length = (duk_small_uint_t) duk_bd_decode(bd, DUK__LENGTH_PROP_BITS); c_nargs = (duk_int_t) duk_bd_decode_flagged(bd, DUK__NARGS_BITS, (duk_uint32_t) c_length /*def_value*/); if (c_nargs == DUK__NARGS_VARARGS_MARKER) { c_nargs = DUK_VARARGS; } c_func = duk_bi_native_functions[natidx]; DUK_DDD(DUK_DDDPRINT("built-in %ld, function-valued property %ld, key %!O, natidx %ld, length %ld, nargs %ld", (long) i, (long) j, (duk_heaphdr *) h_key, (long) natidx, (long) c_length, (c_nargs == DUK_VARARGS ? (long) -1 : (long) c_nargs))); /* Cast converts magic to 16-bit signed value */ magic = (duk_int16_t) duk_bd_decode_varuint(bd); #if defined(DUK_USE_LIGHTFUNC_BUILTINS) lightfunc_eligible = ((c_nargs >= DUK_LFUNC_NARGS_MIN && c_nargs <= DUK_LFUNC_NARGS_MAX) || (c_nargs == DUK_VARARGS)) && (c_length <= DUK_LFUNC_LENGTH_MAX) && (magic >= DUK_LFUNC_MAGIC_MIN && magic <= DUK_LFUNC_MAGIC_MAX); /* These functions have trouble working as lightfuncs. * Some of them have specific asserts and some may have * additional properties (e.g. 'require.id' may be written). */ if (c_func == duk_bi_global_object_eval) { lightfunc_eligible = 0; } #if defined(DUK_USE_COROUTINE_SUPPORT) if (c_func == duk_bi_thread_yield || c_func == duk_bi_thread_resume) { lightfunc_eligible = 0; } #endif if (c_func == duk_bi_function_prototype_call || c_func == duk_bi_function_prototype_apply || c_func == duk_bi_reflect_apply || c_func == duk_bi_reflect_construct) { lightfunc_eligible = 0; } if (lightfunc_eligible) { duk_tval tv_lfunc; duk_small_uint_t lf_nargs = (duk_small_uint_t) (c_nargs == DUK_VARARGS ? DUK_LFUNC_NARGS_VARARGS : c_nargs); duk_small_uint_t lf_flags = DUK_LFUNC_FLAGS_PACK(magic, c_length, lf_nargs); DUK_TVAL_SET_LIGHTFUNC(&tv_lfunc, c_func, lf_flags); duk_push_tval(thr, &tv_lfunc); DUK_D(DUK_DPRINT("built-in function eligible as light function: i=%d, j=%d c_length=%ld, c_nargs=%ld, magic=%ld -> %!iT", (int) i, (int) j, (long) c_length, (long) c_nargs, (long) magic, duk_get_tval(thr, -1))); goto lightfunc_skip; } DUK_D(DUK_DPRINT("built-in function NOT ELIGIBLE as light function: i=%d, j=%d c_length=%ld, c_nargs=%ld, magic=%ld", (int) i, (int) j, (long) c_length, (long) c_nargs, (long) magic)); #endif /* DUK_USE_LIGHTFUNC_BUILTINS */ /* [ (builtin objects) name ] */ duk_push_c_function_builtin_noconstruct(thr, c_func, c_nargs); h_func = duk_known_hnatfunc(thr, -1); DUK_UNREF(h_func); /* XXX: add into init data? */ /* Special call handling, not described in init data. */ if (c_func == duk_bi_global_object_eval || c_func == duk_bi_function_prototype_call || c_func == duk_bi_function_prototype_apply || c_func == duk_bi_reflect_apply || c_func == duk_bi_reflect_construct) { DUK_HOBJECT_SET_SPECIAL_CALL((duk_hobject *) h_func); } /* Currently all built-in native functions are strict. * This doesn't matter for many functions, but e.g. * String.prototype.charAt (and other string functions) * rely on being strict so that their 'this' binding is * not automatically coerced. */ DUK_HOBJECT_SET_STRICT((duk_hobject *) h_func); /* No built-in functions are constructable except the top * level ones (Number, etc). */ DUK_ASSERT(!DUK_HOBJECT_HAS_CONSTRUCTABLE((duk_hobject *) h_func)); /* XXX: any way to avoid decoding magic bit; there are quite * many function properties and relatively few with magic values. */ h_func->magic = magic; /* [ (builtin objects) name func ] */ duk_push_uint(thr, c_length); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_C); duk_dup_m2(thr); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_C); /* XXX: other properties of function instances; 'arguments', 'caller'. */ DUK_DD(DUK_DDPRINT("built-in object %ld, function property %ld -> %!T", (long) i, (long) j, (duk_tval *) duk_get_tval(thr, -1))); /* [ (builtin objects) name func ] */ /* * The default property attributes are correct for all * function valued properties of built-in objects now. */ #if defined(DUK_USE_LIGHTFUNC_BUILTINS) lightfunc_skip: #endif defprop_flags = (duk_small_uint_t) duk_bd_decode_flagged(bd, DUK__PROP_FLAGS_BITS, (duk_uint32_t) DUK_PROPDESC_FLAGS_WC); defprop_flags |= DUK_DEFPROP_FORCE | DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_HAVE_WRITABLE | DUK_DEFPROP_HAVE_ENUMERABLE | DUK_DEFPROP_HAVE_CONFIGURABLE; DUK_ASSERT(DUK_PROPDESC_FLAG_WRITABLE == DUK_DEFPROP_WRITABLE); DUK_ASSERT(DUK_PROPDESC_FLAG_ENUMERABLE == DUK_DEFPROP_ENUMERABLE); DUK_ASSERT(DUK_PROPDESC_FLAG_CONFIGURABLE == DUK_DEFPROP_CONFIGURABLE); duk_def_prop(thr, (duk_idx_t) i, defprop_flags); /* [ (builtin objects) ] */ } } /* * Special post-tweaks, for cases not covered by the init data format. * * - Set Date.prototype.toGMTString to Date.prototype.toUTCString. * toGMTString is required to have the same Function object as * toUTCString in E5 Section B.2.6. Note that while Smjs respects * this, V8 does not (the Function objects are distinct). * * - Make DoubleError non-extensible. * * - Add info about most important effective compile options to Duktape. * * - Possibly remove some properties (values or methods) which are not * desirable with current feature options but are not currently * conditional in init data. */ #if defined(DUK_USE_DATE_BUILTIN) duk_get_prop_stridx_short(thr, DUK_BIDX_DATE_PROTOTYPE, DUK_STRIDX_TO_UTC_STRING); duk_xdef_prop_stridx_short(thr, DUK_BIDX_DATE_PROTOTYPE, DUK_STRIDX_TO_GMT_STRING, DUK_PROPDESC_FLAGS_WC); #endif h = duk_known_hobject(thr, DUK_BIDX_DOUBLE_ERROR); DUK_HOBJECT_CLEAR_EXTENSIBLE(h); #if !defined(DUK_USE_ES6_OBJECT_PROTO_PROPERTY) DUK_DD(DUK_DDPRINT("delete Object.prototype.__proto__ built-in which is not enabled in features")); (void) duk_hobject_delprop_raw(thr, thr->builtins[DUK_BIDX_OBJECT_PROTOTYPE], DUK_HTHREAD_STRING___PROTO__(thr), DUK_DELPROP_FLAG_THROW); #endif #if !defined(DUK_USE_ES6_OBJECT_SETPROTOTYPEOF) DUK_DD(DUK_DDPRINT("delete Object.setPrototypeOf built-in which is not enabled in features")); (void) duk_hobject_delprop_raw(thr, thr->builtins[DUK_BIDX_OBJECT_CONSTRUCTOR], DUK_HTHREAD_STRING_SET_PROTOTYPE_OF(thr), DUK_DELPROP_FLAG_THROW); #endif /* XXX: relocate */ duk_push_string(thr, /* Endianness indicator */ #if defined(DUK_USE_INTEGER_LE) "l" #elif defined(DUK_USE_INTEGER_BE) "b" #elif defined(DUK_USE_INTEGER_ME) /* integer mixed endian not really used now */ "m" #else "?" #endif #if defined(DUK_USE_DOUBLE_LE) "l" #elif defined(DUK_USE_DOUBLE_BE) "b" #elif defined(DUK_USE_DOUBLE_ME) "m" #else "?" #endif " " /* Packed or unpacked tval */ #if defined(DUK_USE_PACKED_TVAL) "p" #else "u" #endif #if defined(DUK_USE_FASTINT) "f" #endif " " /* Low memory/performance options */ #if defined(DUK_USE_STRTAB_PTRCOMP) "s" #endif #if !defined(DUK_USE_HEAPPTR16) && !defined(DUK_DATAPTR16) && !defined(DUK_FUNCPTR16) "n" #endif #if defined(DUK_USE_HEAPPTR16) "h" #endif #if defined(DUK_USE_DATAPTR16) "d" #endif #if defined(DUK_USE_FUNCPTR16) "f" #endif #if defined(DUK_USE_REFCOUNT16) "R" #endif #if defined(DUK_USE_STRHASH16) "H" #endif #if defined(DUK_USE_STRLEN16) "S" #endif #if defined(DUK_USE_BUFLEN16) "B" #endif #if defined(DUK_USE_OBJSIZES16) "O" #endif #if defined(DUK_USE_LIGHTFUNC_BUILTINS) "L" #endif #if defined(DUK_USE_ROM_STRINGS) || defined(DUK_USE_ROM_OBJECTS) /* XXX: This won't be shown in practice now * because this code is not run when builtins * are in ROM. */ "Z" #endif #if defined(DUK_USE_LITCACHE_SIZE) "l" #endif " " /* Object property allocation layout */ #if defined(DUK_USE_HOBJECT_LAYOUT_1) "p1" #elif defined(DUK_USE_HOBJECT_LAYOUT_2) "p2" #elif defined(DUK_USE_HOBJECT_LAYOUT_3) "p3" #else "p?" #endif " " /* Alignment guarantee */ #if (DUK_USE_ALIGN_BY == 4) "a4" #elif (DUK_USE_ALIGN_BY == 8) "a8" #elif (DUK_USE_ALIGN_BY == 1) "a1" #else #error invalid DUK_USE_ALIGN_BY #endif " " /* Architecture, OS, and compiler strings */ DUK_USE_ARCH_STRING " " DUK_USE_OS_STRING " " DUK_USE_COMPILER_STRING); duk_xdef_prop_stridx_short(thr, DUK_BIDX_DUKTAPE, DUK_STRIDX_ENV, DUK_PROPDESC_FLAGS_WC); /* * Since built-ins are not often extended, compact them. */ DUK_DD(DUK_DDPRINT("compact built-ins")); for (i = 0; i < DUK_NUM_ALL_BUILTINS; i++) { duk_hobject_compact_props(thr, duk_known_hobject(thr, (duk_idx_t) i)); } DUK_D(DUK_DPRINT("INITBUILTINS END")); #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 1) for (i = 0; i < DUK_NUM_ALL_BUILTINS; i++) { DUK_DD(DUK_DDPRINT("built-in object %ld after initialization and compacting: %!@iO", (long) i, (duk_heaphdr *) duk_require_hobject(thr, (duk_idx_t) i))); } #endif /* * Pop built-ins from stack: they are now INCREF'd and * reachable from the builtins[] array or indirectly * through builtins[]. */ duk_set_top(thr, 0); DUK_ASSERT_TOP(thr, 0); } #endif /* DUK_USE_ROM_OBJECTS */ DUK_INTERNAL void duk_hthread_copy_builtin_objects(duk_hthread *thr_from, duk_hthread *thr_to) { duk_small_uint_t i; for (i = 0; i < DUK_NUM_BUILTINS; i++) { thr_to->builtins[i] = thr_from->builtins[i]; DUK_HOBJECT_INCREF_ALLOWNULL(thr_to, thr_to->builtins[i]); /* side effect free */ } } /* automatic undefs */ #undef DUK__LENGTH_PROP_BITS #undef DUK__NARGS_BITS #undef DUK__NARGS_VARARGS_MARKER #undef DUK__PROP_FLAGS_BITS #undef DUK__PROP_TYPE_ACCESSOR #undef DUK__PROP_TYPE_BITS #undef DUK__PROP_TYPE_BOOLEAN_FALSE #undef DUK__PROP_TYPE_BOOLEAN_TRUE #undef DUK__PROP_TYPE_BUILTIN #undef DUK__PROP_TYPE_DOUBLE #undef DUK__PROP_TYPE_STRIDX #undef DUK__PROP_TYPE_STRING #undef DUK__PROP_TYPE_UNDEFINED /* * Thread support. */ /* #include duk_internal.h -> already included */ DUK_INTERNAL void duk_hthread_terminate(duk_hthread *thr) { DUK_ASSERT(thr != NULL); while (thr->callstack_curr != NULL) { duk_hthread_activation_unwind_norz(thr); } thr->valstack_bottom = thr->valstack; duk_set_top(thr, 0); /* unwinds valstack, updating refcounts */ thr->state = DUK_HTHREAD_STATE_TERMINATED; /* Here we could remove references to built-ins, but it may not be * worth the effort because built-ins are quite likely to be shared * with another (unterminated) thread, and terminated threads are also * usually garbage collected quite quickly. * * We could also shrink the value stack here, but that also may not * be worth the effort for the same reason. */ DUK_REFZERO_CHECK_SLOW(thr); } #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_INTERNAL duk_uint_fast32_t duk_hthread_get_act_curr_pc(duk_hthread *thr, duk_activation *act) { duk_instr_t *bcode; DUK_ASSERT(thr != NULL); DUK_ASSERT(act != NULL); DUK_UNREF(thr); /* XXX: store 'bcode' pointer to activation for faster lookup? */ if (act->func && DUK_HOBJECT_IS_COMPFUNC(act->func)) { bcode = DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, (duk_hcompfunc *) (act->func)); return (duk_uint_fast32_t) (act->curr_pc - bcode); } return 0; } #endif /* DUK_USE_DEBUGGER_SUPPORT */ DUK_INTERNAL duk_uint_fast32_t duk_hthread_get_act_prev_pc(duk_hthread *thr, duk_activation *act) { duk_instr_t *bcode; duk_uint_fast32_t ret; DUK_ASSERT(thr != NULL); DUK_ASSERT(act != NULL); DUK_UNREF(thr); if (act->func && DUK_HOBJECT_IS_COMPFUNC(act->func)) { bcode = DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, (duk_hcompfunc *) (act->func)); ret = (duk_uint_fast32_t) (act->curr_pc - bcode); if (ret > 0) { ret--; } return ret; } return 0; } /* Write bytecode executor's curr_pc back to topmost activation (if any). */ DUK_INTERNAL void duk_hthread_sync_currpc(duk_hthread *thr) { duk_activation *act; DUK_ASSERT(thr != NULL); if (thr->ptr_curr_pc != NULL) { /* ptr_curr_pc != NULL only when bytecode executor is active. */ DUK_ASSERT(thr->callstack_top > 0); DUK_ASSERT(thr->callstack_curr != NULL); act = thr->callstack_curr; DUK_ASSERT(act != NULL); act->curr_pc = *thr->ptr_curr_pc; } } DUK_INTERNAL void duk_hthread_sync_and_null_currpc(duk_hthread *thr) { duk_activation *act; DUK_ASSERT(thr != NULL); if (thr->ptr_curr_pc != NULL) { /* ptr_curr_pc != NULL only when bytecode executor is active. */ DUK_ASSERT(thr->callstack_top > 0); DUK_ASSERT(thr->callstack_curr != NULL); act = thr->callstack_curr; DUK_ASSERT(act != NULL); act->curr_pc = *thr->ptr_curr_pc; thr->ptr_curr_pc = NULL; } } /* * Thread stack (mainly call stack) primitives: allocation of activations, * unwinding catchers and activations, etc. * * Value stack handling is a part of the API implementation. */ /* #include duk_internal.h -> already included */ /* Unwind the topmost catcher of the current activation (caller must check that * both exist) without side effects. */ DUK_INTERNAL void duk_hthread_catcher_unwind_norz(duk_hthread *thr, duk_activation *act) { duk_catcher *cat; DUK_ASSERT(thr != NULL); DUK_ASSERT(act != NULL); DUK_ASSERT(act->cat != NULL); /* caller must check */ cat = act->cat; DUK_ASSERT(cat != NULL); DUK_DDD(DUK_DDDPRINT("unwinding catch stack entry %p (lexenv check is done)", (void *) cat)); if (DUK_CAT_HAS_LEXENV_ACTIVE(cat)) { duk_hobject *env; env = act->lex_env; /* current lex_env of the activation (created for catcher) */ DUK_ASSERT(env != NULL); /* must be, since env was created when catcher was created */ act->lex_env = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, env); /* prototype is lex_env before catcher created */ DUK_HOBJECT_INCREF(thr, act->lex_env); DUK_HOBJECT_DECREF_NORZ(thr, env); /* There is no need to decref anything else than 'env': if 'env' * becomes unreachable, refzero will handle decref'ing its prototype. */ } act->cat = cat->parent; duk_hthread_catcher_free(thr, cat); } /* Same as above, but caller is certain no catcher-related lexenv may exist. */ DUK_INTERNAL void duk_hthread_catcher_unwind_nolexenv_norz(duk_hthread *thr, duk_activation *act) { duk_catcher *cat; DUK_ASSERT(thr != NULL); DUK_ASSERT(act != NULL); DUK_ASSERT(act->cat != NULL); /* caller must check */ cat = act->cat; DUK_ASSERT(cat != NULL); DUK_DDD(DUK_DDDPRINT("unwinding catch stack entry %p (lexenv check is not done)", (void *) cat)); DUK_ASSERT(!DUK_CAT_HAS_LEXENV_ACTIVE(cat)); act->cat = cat->parent; duk_hthread_catcher_free(thr, cat); } DUK_LOCAL #if defined(DUK_USE_CACHE_CATCHER) DUK_NOINLINE #endif duk_catcher *duk__hthread_catcher_alloc_slow(duk_hthread *thr) { duk_catcher *cat; cat = (duk_catcher *) DUK_ALLOC_CHECKED(thr, sizeof(duk_catcher)); DUK_ASSERT(cat != NULL); return cat; } #if defined(DUK_USE_CACHE_CATCHER) DUK_INTERNAL DUK_INLINE duk_catcher *duk_hthread_catcher_alloc(duk_hthread *thr) { duk_catcher *cat; DUK_ASSERT(thr != NULL); cat = thr->heap->catcher_free; if (DUK_LIKELY(cat != NULL)) { thr->heap->catcher_free = cat->parent; return cat; } return duk__hthread_catcher_alloc_slow(thr); } #else /* DUK_USE_CACHE_CATCHER */ DUK_INTERNAL duk_catcher *duk_hthread_catcher_alloc(duk_hthread *thr) { return duk__hthread_catcher_alloc_slow(thr); } #endif /* DUK_USE_CACHE_CATCHER */ DUK_INTERNAL void duk_hthread_catcher_free(duk_hthread *thr, duk_catcher *cat) { DUK_ASSERT(thr != NULL); DUK_ASSERT(cat != NULL); #if defined(DUK_USE_CACHE_CATCHER) /* Unconditional caching for now; freed in mark-and-sweep. */ cat->parent = thr->heap->catcher_free; thr->heap->catcher_free = cat; #else DUK_FREE_CHECKED(thr, (void *) cat); #endif } DUK_LOCAL #if defined(DUK_USE_CACHE_ACTIVATION) DUK_NOINLINE #endif duk_activation *duk__hthread_activation_alloc_slow(duk_hthread *thr) { duk_activation *act; act = (duk_activation *) DUK_ALLOC_CHECKED(thr, sizeof(duk_activation)); DUK_ASSERT(act != NULL); return act; } #if defined(DUK_USE_CACHE_ACTIVATION) DUK_INTERNAL DUK_INLINE duk_activation *duk_hthread_activation_alloc(duk_hthread *thr) { duk_activation *act; DUK_ASSERT(thr != NULL); act = thr->heap->activation_free; if (DUK_LIKELY(act != NULL)) { thr->heap->activation_free = act->parent; return act; } return duk__hthread_activation_alloc_slow(thr); } #else /* DUK_USE_CACHE_ACTIVATION */ DUK_INTERNAL duk_activation *duk_hthread_activation_alloc(duk_hthread *thr) { return duk__hthread_activation_alloc_slow(thr); } #endif /* DUK_USE_CACHE_ACTIVATION */ DUK_INTERNAL void duk_hthread_activation_free(duk_hthread *thr, duk_activation *act) { DUK_ASSERT(thr != NULL); DUK_ASSERT(act != NULL); #if defined(DUK_USE_CACHE_ACTIVATION) /* Unconditional caching for now; freed in mark-and-sweep. */ act->parent = thr->heap->activation_free; thr->heap->activation_free = act; #else DUK_FREE_CHECKED(thr, (void *) act); #endif } /* Internal helper: process the unwind for the topmost activation of a thread, * but leave the duk_activation in place for possible tailcall reuse. */ DUK_LOCAL void duk__activation_unwind_nofree_norz(duk_hthread *thr) { #if defined(DUK_USE_DEBUGGER_SUPPORT) duk_heap *heap; #endif duk_activation *act; duk_hobject *func; duk_hobject *tmp; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->callstack_curr != NULL); /* caller must check */ DUK_ASSERT(thr->callstack_top > 0); act = thr->callstack_curr; DUK_ASSERT(act != NULL); /* With lightfuncs, act 'func' may be NULL. */ /* With duk_activation records allocated separately, 'act' is a stable * pointer and not affected by side effects. */ #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) /* * Restore 'caller' property for non-strict callee functions. */ func = DUK_ACT_GET_FUNC(act); if (func != NULL && !DUK_HOBJECT_HAS_STRICT(func)) { duk_tval *tv_caller; duk_tval tv_tmp; duk_hobject *h_tmp; tv_caller = duk_hobject_find_entry_tval_ptr_stridx(thr->heap, func, DUK_STRIDX_CALLER); /* The act->prev_caller should only be set if the entry for 'caller' * exists (as it is only set in that case, and the property is not * configurable), but handle all the cases anyway. */ if (tv_caller) { DUK_TVAL_SET_TVAL(&tv_tmp, tv_caller); if (act->prev_caller) { /* Just transfer the refcount from act->prev_caller to tv_caller, * so no need for a refcount update. This is the expected case. */ DUK_TVAL_SET_OBJECT(tv_caller, act->prev_caller); act->prev_caller = NULL; } else { DUK_TVAL_SET_NULL(tv_caller); /* no incref needed */ DUK_ASSERT(act->prev_caller == NULL); } DUK_TVAL_DECREF_NORZ(thr, &tv_tmp); } else { h_tmp = act->prev_caller; if (h_tmp) { act->prev_caller = NULL; DUK_HOBJECT_DECREF_NORZ(thr, h_tmp); } } DUK_ASSERT(act->prev_caller == NULL); } #endif /* * Unwind debugger state. If we unwind while stepping * (for any step type), pause execution. This is the * only place explicitly handling a step out. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) heap = thr->heap; if (heap->dbg_pause_act == thr->callstack_curr) { if (heap->dbg_pause_flags & DUK_PAUSE_FLAG_FUNC_EXIT) { DUK_D(DUK_DPRINT("PAUSE TRIGGERED by function exit")); duk_debug_set_paused(heap); } else { DUK_D(DUK_DPRINT("unwound past dbg_pause_act, set to NULL")); heap->dbg_pause_act = NULL; /* avoid stale pointers */ } DUK_ASSERT(heap->dbg_pause_act == NULL); } #endif /* * Unwind catchers. * * Since there are no references in the catcher structure, * unwinding is quite simple. The only thing we need to * look out for is popping a possible lexical environment * established for an active catch clause. */ while (act->cat != NULL) { duk_hthread_catcher_unwind_norz(thr, act); } /* * Close environment record(s) if they exist. * * Only variable environments are closed. If lex_env != var_env, it * cannot currently contain any register bound declarations. * * Only environments created for a NEWENV function are closed. If an * environment is created for e.g. an eval call, it must not be closed. */ func = DUK_ACT_GET_FUNC(act); if (func != NULL && !DUK_HOBJECT_HAS_NEWENV(func)) { DUK_DDD(DUK_DDDPRINT("skip closing environments, envs not owned by this activation")); goto skip_env_close; } /* func is NULL for lightfunc */ /* Catch sites are required to clean up their environments * in FINALLY part before propagating, so this should * always hold here. */ DUK_ASSERT(act->lex_env == act->var_env); /* XXX: Closing the environment record copies values from registers * into the scope object. It's side effect free as such, but may * currently run out of memory which causes an error throw. This is * an actual sandboxing problem for error unwinds, and needs to be * fixed e.g. by preallocating the scope property slots. */ if (act->var_env != NULL) { DUK_DDD(DUK_DDDPRINT("closing var_env record %p -> %!O", (void *) act->var_env, (duk_heaphdr *) act->var_env)); duk_js_close_environment_record(thr, act->var_env); } skip_env_close: /* * Update preventcount */ if (act->flags & DUK_ACT_FLAG_PREVENT_YIELD) { DUK_ASSERT(thr->callstack_preventcount >= 1); thr->callstack_preventcount--; } /* * Reference count updates, using NORZ macros so we don't * need to handle side effects. * * duk_activation pointers like act->var_env are intentionally * left as garbage and not NULLed. Without side effects they * can't be used when the values are dangling/garbage. */ DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, act->var_env); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, act->lex_env); tmp = DUK_ACT_GET_FUNC(act); DUK_HOBJECT_DECREF_NORZ_ALLOWNULL(thr, tmp); DUK_UNREF(tmp); } /* Unwind topmost duk_activation of a thread, caller must ensure that an * activation exists. The call is side effect free, except that scope * closure may currently throw an out-of-memory error. */ DUK_INTERNAL void duk_hthread_activation_unwind_norz(duk_hthread *thr) { duk_activation *act; duk__activation_unwind_nofree_norz(thr); DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(thr->callstack_top > 0); act = thr->callstack_curr; thr->callstack_curr = act->parent; thr->callstack_top--; /* Ideally we'd restore value stack reserve here to caller's value. * This doesn't work for current unwind call sites however, because * the current (unwound) value stack top may be above the reserve. * Thus value stack reserve is restored by the call sites. */ /* XXX: inline for performance builds? */ duk_hthread_activation_free(thr, act); /* We could clear the book-keeping variables like retval_byteoff for * the topmost activation, but don't do so now as it's not necessary. */ } DUK_INTERNAL void duk_hthread_activation_unwind_reuse_norz(duk_hthread *thr) { duk__activation_unwind_nofree_norz(thr); } /* Get duk_activation for given callstack level or NULL if level is invalid * or deeper than the call stack. Level -1 refers to current activation, -2 * to its caller, etc. Starting from Duktape 2.2 finding the activation is * a linked list scan which gets more expensive the deeper the lookup is. */ DUK_INTERNAL duk_activation *duk_hthread_get_activation_for_level(duk_hthread *thr, duk_int_t level) { duk_activation *act; if (level >= 0) { return NULL; } act = thr->callstack_curr; for (;;) { if (act == NULL) { return act; } if (level == -1) { return act; } level++; act = act->parent; } /* never here */ } #if defined(DUK_USE_FINALIZER_TORTURE) DUK_INTERNAL void duk_hthread_valstack_torture_realloc(duk_hthread *thr) { duk_size_t alloc_size; duk_tval *new_ptr; duk_ptrdiff_t alloc_end_off; duk_ptrdiff_t end_off; duk_ptrdiff_t bottom_off; duk_ptrdiff_t top_off; if (thr->valstack == NULL) { DUK_D(DUK_DPRINT("skip valstack torture realloc, valstack is NULL")); return; } alloc_end_off = (duk_ptrdiff_t) ((duk_uint8_t *) thr->valstack_alloc_end - (duk_uint8_t *) thr->valstack); end_off = (duk_ptrdiff_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack); bottom_off = (duk_ptrdiff_t) ((duk_uint8_t *) thr->valstack_bottom - (duk_uint8_t *) thr->valstack); top_off = (duk_ptrdiff_t) ((duk_uint8_t *) thr->valstack_top - (duk_uint8_t *) thr->valstack); alloc_size = (duk_size_t) alloc_end_off; if (alloc_size == 0) { DUK_D(DUK_DPRINT("skip valstack torture realloc, alloc_size is zero")); return; } /* Use DUK_ALLOC_RAW() to avoid side effects. */ new_ptr = (duk_tval *) DUK_ALLOC_RAW(thr->heap, alloc_size); if (new_ptr != NULL) { duk_memcpy((void *) new_ptr, (const void *) thr->valstack, alloc_size); duk_memset((void *) thr->valstack, 0x55, alloc_size); DUK_FREE_CHECKED(thr, (void *) thr->valstack); thr->valstack = new_ptr; thr->valstack_alloc_end = (duk_tval *) ((duk_uint8_t *) new_ptr + alloc_end_off); thr->valstack_end = (duk_tval *) ((duk_uint8_t *) new_ptr + end_off); thr->valstack_bottom = (duk_tval *) ((duk_uint8_t *) new_ptr + bottom_off); thr->valstack_top = (duk_tval *) ((duk_uint8_t *) new_ptr + top_off); } else { DUK_D(DUK_DPRINT("failed to realloc valstack for torture, ignore")); } } #endif /* DUK_USE_FINALIZER_TORTURE */ /* * Shared helpers for arithmetic operations */ /* #include duk_internal.h -> already included */ /* ECMAScript modulus ('%') does not match IEEE 754 "remainder" operation * (implemented by remainder() in C99) but does seem to match ANSI C fmod(). * Compare E5 Section 11.5.3 and "man fmod". */ DUK_INTERNAL double duk_js_arith_mod(double d1, double d2) { #if defined(DUK_USE_POW_WORKAROUNDS) /* Specific fixes to common fmod() implementation issues: * - test-bug-mingw-math-issues.js */ if (DUK_ISINF(d2)) { if (DUK_ISINF(d1)) { return DUK_DOUBLE_NAN; } else { return d1; } } else if (d1 == 0.0) { /* d1 +/-0 is returned as is (preserving sign) except when * d2 is zero or NaN. */ if (d2 == 0.0 || DUK_ISNAN(d2)) { return DUK_DOUBLE_NAN; } else { return d1; } } #else /* Some ISO C assumptions. */ DUK_ASSERT(DUK_FMOD(1.0, DUK_DOUBLE_INFINITY) == 1.0); DUK_ASSERT(DUK_FMOD(-1.0, DUK_DOUBLE_INFINITY) == -1.0); DUK_ASSERT(DUK_FMOD(1.0, -DUK_DOUBLE_INFINITY) == 1.0); DUK_ASSERT(DUK_FMOD(-1.0, -DUK_DOUBLE_INFINITY) == -1.0); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(DUK_DOUBLE_INFINITY, DUK_DOUBLE_INFINITY))); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(DUK_DOUBLE_INFINITY, -DUK_DOUBLE_INFINITY))); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(-DUK_DOUBLE_INFINITY, DUK_DOUBLE_INFINITY))); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(-DUK_DOUBLE_INFINITY, -DUK_DOUBLE_INFINITY))); DUK_ASSERT(DUK_FMOD(0.0, 1.0) == 0.0 && DUK_SIGNBIT(DUK_FMOD(0.0, 1.0)) == 0); DUK_ASSERT(DUK_FMOD(-0.0, 1.0) == 0.0 && DUK_SIGNBIT(DUK_FMOD(-0.0, 1.0)) != 0); DUK_ASSERT(DUK_FMOD(0.0, DUK_DOUBLE_INFINITY) == 0.0 && DUK_SIGNBIT(DUK_FMOD(0.0, DUK_DOUBLE_INFINITY)) == 0); DUK_ASSERT(DUK_FMOD(-0.0, DUK_DOUBLE_INFINITY) == 0.0 && DUK_SIGNBIT(DUK_FMOD(-0.0, DUK_DOUBLE_INFINITY)) != 0); DUK_ASSERT(DUK_FMOD(0.0, -DUK_DOUBLE_INFINITY) == 0.0 && DUK_SIGNBIT(DUK_FMOD(0.0, DUK_DOUBLE_INFINITY)) == 0); DUK_ASSERT(DUK_FMOD(-0.0, -DUK_DOUBLE_INFINITY) == 0.0 && DUK_SIGNBIT(DUK_FMOD(-0.0, -DUK_DOUBLE_INFINITY)) != 0); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(0.0, 0.0))); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(-0.0, 0.0))); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(0.0, -0.0))); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(-0.0, -0.0))); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(0.0, DUK_DOUBLE_NAN))); DUK_ASSERT(DUK_ISNAN(DUK_FMOD(-0.0, DUK_DOUBLE_NAN))); #endif return (duk_double_t) DUK_FMOD((double) d1, (double) d2); } /* Shared helper for Math.pow() and exponentiation operator. */ DUK_INTERNAL double duk_js_arith_pow(double x, double y) { /* The ANSI C pow() semantics differ from ECMAScript. * * E.g. when x==1 and y is +/- infinite, the ECMAScript required * result is NaN, while at least Linux pow() returns 1. */ duk_small_int_t cx, cy, sx; DUK_UNREF(cx); DUK_UNREF(sx); cy = (duk_small_int_t) DUK_FPCLASSIFY(y); if (cy == DUK_FP_NAN) { goto ret_nan; } if (DUK_FABS(x) == 1.0 && cy == DUK_FP_INFINITE) { goto ret_nan; } #if defined(DUK_USE_POW_WORKAROUNDS) /* Specific fixes to common pow() implementation issues: * - test-bug-netbsd-math-pow.js: NetBSD 6.0 on x86 (at least) * - test-bug-mingw-math-issues.js */ cx = (duk_small_int_t) DUK_FPCLASSIFY(x); if (cx == DUK_FP_ZERO && y < 0.0) { sx = (duk_small_int_t) DUK_SIGNBIT(x); if (sx == 0) { /* Math.pow(+0,y) should be Infinity when y<0. NetBSD pow() * returns -Infinity instead when y is <0 and finite. The * if-clause also catches y == -Infinity (which works even * without the fix). */ return DUK_DOUBLE_INFINITY; } else { /* Math.pow(-0,y) where y<0 should be: * - -Infinity if y<0 and an odd integer * - Infinity if y<0 but not an odd integer * NetBSD pow() returns -Infinity for all finite y<0. The * if-clause also catches y == -Infinity (which works even * without the fix). */ /* fmod() return value has same sign as input (negative) so * the result here will be in the range ]-2,0], -1 indicates * odd. If x is -Infinity, NaN is returned and the odd check * always concludes "not odd" which results in desired outcome. */ double tmp = DUK_FMOD(y, 2); if (tmp == -1.0) { return -DUK_DOUBLE_INFINITY; } else { /* Not odd, or y == -Infinity */ return DUK_DOUBLE_INFINITY; } } } else if (cx == DUK_FP_NAN) { if (y == 0.0) { /* NaN ** +/- 0 should always be 1, but is NaN on * at least some Cygwin/MinGW versions. */ return 1.0; } } #else /* Some ISO C assumptions. */ DUK_ASSERT(DUK_POW(DUK_DOUBLE_NAN, 0.0) == 1.0); DUK_ASSERT(DUK_ISINF(DUK_POW(0.0, -1.0)) && DUK_SIGNBIT(DUK_POW(0.0, -1.0)) == 0); DUK_ASSERT(DUK_ISINF(DUK_POW(-0.0, -2.0)) && DUK_SIGNBIT(DUK_POW(-0.0, -2.0)) == 0); DUK_ASSERT(DUK_ISINF(DUK_POW(-0.0, -3.0)) && DUK_SIGNBIT(DUK_POW(-0.0, -3.0)) != 0); #endif return DUK_POW(x, y); ret_nan: return DUK_DOUBLE_NAN; } /* * Call handling. * * duk_handle_call_unprotected(): * * - Unprotected call to ECMAScript or Duktape/C function, from native * code or bytecode executor. * * - Also handles Ecma-to-Ecma calls which reuses a currently running * executor instance to avoid native recursion. Call setup is done * normally, but just before calling the bytecode executor a special * return code is used to indicate that a calling executor is reused. * * - Also handles tailcalls, i.e. reuse of current duk_activation. * * - Also handles setup for initial Duktape.Thread.resume(). * * duk_handle_safe_call(): * * - Protected C call within current activation. * * setjmp() and local variables have a nasty interaction, see execution.rst; * non-volatile locals modified after setjmp() call are not guaranteed to * keep their value and can cause compiler or compiler version specific * difficult to replicate issues. * * See 'execution.rst'. */ /* #include duk_internal.h -> already included */ /* XXX: heap->error_not_allowed for success path too? */ /* * Limit check helpers. */ /* Check native stack space if DUK_USE_NATIVE_STACK_CHECK() defined. */ DUK_INTERNAL void duk_native_stack_check(duk_hthread *thr) { #if defined(DUK_USE_NATIVE_STACK_CHECK) if (DUK_USE_NATIVE_STACK_CHECK() != 0) { DUK_ERROR_RANGE(thr, DUK_STR_NATIVE_STACK_LIMIT); } #else DUK_UNREF(thr); #endif } /* Allow headroom for calls during error augmentation (see GH-191). * We allow space for 10 additional recursions, with one extra * for, e.g. a print() call at the deepest level, and an extra * +1 for protected call wrapping. */ #define DUK__AUGMENT_CALL_RELAX_COUNT (10 + 2) /* Stack space required by call handling entry. */ #define DUK__CALL_HANDLING_REQUIRE_STACK 8 DUK_LOCAL DUK_NOINLINE void duk__call_c_recursion_limit_check_slowpath(duk_hthread *thr) { /* When augmenting an error, the effective limit is a bit higher. * Check for it only if the fast path check fails. */ #if defined(DUK_USE_AUGMENT_ERROR_THROW) || defined(DUK_USE_AUGMENT_ERROR_CREATE) if (thr->heap->augmenting_error) { if (thr->heap->call_recursion_depth < thr->heap->call_recursion_limit + DUK__AUGMENT_CALL_RELAX_COUNT) { DUK_D(DUK_DPRINT("C recursion limit reached but augmenting error and within relaxed limit")); return; } } #endif DUK_D(DUK_DPRINT("call prevented because C recursion limit reached")); DUK_ERROR_RANGE(thr, DUK_STR_NATIVE_STACK_LIMIT); DUK_WO_NORETURN(return;); } DUK_LOCAL DUK_ALWAYS_INLINE void duk__call_c_recursion_limit_check(duk_hthread *thr) { DUK_ASSERT(thr->heap->call_recursion_depth >= 0); DUK_ASSERT(thr->heap->call_recursion_depth <= thr->heap->call_recursion_limit); duk_native_stack_check(thr); /* This check is forcibly inlined because it's very cheap and almost * always passes. The slow path is forcibly noinline. */ if (DUK_LIKELY(thr->heap->call_recursion_depth < thr->heap->call_recursion_limit)) { return; } duk__call_c_recursion_limit_check_slowpath(thr); } DUK_LOCAL DUK_NOINLINE void duk__call_callstack_limit_check_slowpath(duk_hthread *thr) { /* When augmenting an error, the effective limit is a bit higher. * Check for it only if the fast path check fails. */ #if defined(DUK_USE_AUGMENT_ERROR_THROW) || defined(DUK_USE_AUGMENT_ERROR_CREATE) if (thr->heap->augmenting_error) { if (thr->callstack_top < DUK_USE_CALLSTACK_LIMIT + DUK__AUGMENT_CALL_RELAX_COUNT) { DUK_D(DUK_DPRINT("call stack limit reached but augmenting error and within relaxed limit")); return; } } #endif /* XXX: error message is a bit misleading: we reached a recursion * limit which is also essentially the same as a C callstack limit * (except perhaps with some relaxed threading assumptions). */ DUK_D(DUK_DPRINT("call prevented because call stack limit reached")); DUK_ERROR_RANGE(thr, DUK_STR_CALLSTACK_LIMIT); DUK_WO_NORETURN(return;); } DUK_LOCAL DUK_ALWAYS_INLINE void duk__call_callstack_limit_check(duk_hthread *thr) { /* This check is forcibly inlined because it's very cheap and almost * always passes. The slow path is forcibly noinline. */ if (DUK_LIKELY(thr->callstack_top < DUK_USE_CALLSTACK_LIMIT)) { return; } duk__call_callstack_limit_check_slowpath(thr); } /* * Interrupt counter fixup (for development only). */ #if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG) DUK_LOCAL void duk__interrupt_fixup(duk_hthread *thr, duk_hthread *entry_curr_thread) { /* Currently the bytecode executor and executor interrupt * instruction counts are off because we don't execute the * interrupt handler when we're about to exit from the initial * user call into Duktape. * * If we were to execute the interrupt handler here, the counts * would match. You can enable this block manually to check * that this is the case. */ DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); #if defined(DUK_USE_INTERRUPT_DEBUG_FIXUP) if (entry_curr_thread == NULL) { thr->interrupt_init = thr->interrupt_init - thr->interrupt_counter; thr->heap->inst_count_interrupt += thr->interrupt_init; DUK_DD(DUK_DDPRINT("debug test: updated interrupt count on exit to " "user code, instruction counts: executor=%ld, interrupt=%ld", (long) thr->heap->inst_count_exec, (long) thr->heap->inst_count_interrupt)); DUK_ASSERT(thr->heap->inst_count_exec == thr->heap->inst_count_interrupt); } #else DUK_UNREF(thr); DUK_UNREF(entry_curr_thread); #endif } #endif /* * Arguments object creation. * * Creating arguments objects involves many small details, see E5 Section * 10.6 for the specific requirements. Much of the arguments object exotic * behavior is implemented in duk_hobject_props.c, and is enabled by the * object flag DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS. */ DUK_LOCAL void duk__create_arguments_object(duk_hthread *thr, duk_hobject *func, duk_hobject *varenv, duk_idx_t idx_args) { duk_hobject *arg; /* 'arguments' */ duk_hobject *formals; /* formals for 'func' (may be NULL if func is a C function) */ duk_idx_t i_arg; duk_idx_t i_map; duk_idx_t i_mappednames; duk_idx_t i_formals; duk_idx_t i_argbase; duk_idx_t n_formals; duk_idx_t idx; duk_idx_t num_stack_args; duk_bool_t need_map; DUK_ASSERT(thr != NULL); DUK_ASSERT(func != NULL); DUK_ASSERT(DUK_HOBJECT_IS_NONBOUND_FUNCTION(func)); DUK_ASSERT(varenv != NULL); /* [ ... func this arg1(@idx_args) ... argN envobj ] * [ arg1(@idx_args) ... argN envobj ] (for tailcalls) */ need_map = 0; i_argbase = idx_args; num_stack_args = duk_get_top(thr) - i_argbase - 1; DUK_ASSERT(i_argbase >= 0); DUK_ASSERT(num_stack_args >= 0); formals = (duk_hobject *) duk_hobject_get_formals(thr, (duk_hobject *) func); if (formals) { n_formals = (duk_idx_t) ((duk_harray *) formals)->length; duk_push_hobject(thr, formals); } else { /* This shouldn't happen without tampering of internal * properties: if a function accesses 'arguments', _Formals * is kept. Check for the case anyway in case internal * properties have been modified manually. */ DUK_D(DUK_DPRINT("_Formals is undefined when creating arguments, use n_formals == 0")); n_formals = 0; duk_push_undefined(thr); } i_formals = duk_require_top_index(thr); DUK_ASSERT(n_formals >= 0); DUK_ASSERT(formals != NULL || n_formals == 0); DUK_DDD(DUK_DDDPRINT("func=%!O, formals=%!O, n_formals=%ld", (duk_heaphdr *) func, (duk_heaphdr *) formals, (long) n_formals)); /* [ ... formals ] */ /* * Create required objects: * - 'arguments' object: array-like, but not an array * - 'map' object: internal object, tied to 'arguments' (bare) * - 'mappedNames' object: temporary value used during construction (bare) */ arg = duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_FLAG_ARRAY_PART | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARGUMENTS), DUK_BIDX_OBJECT_PROTOTYPE); DUK_ASSERT(arg != NULL); (void) duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT), -1); /* no prototype */ (void) duk_push_object_helper(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_FLAG_FASTREFS | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT), -1); /* no prototype */ i_arg = duk_get_top(thr) - 3; i_map = i_arg + 1; i_mappednames = i_arg + 2; DUK_ASSERT(!duk_is_bare_object(thr, -3)); /* arguments */ DUK_ASSERT(duk_is_bare_object(thr, -2)); /* map */ DUK_ASSERT(duk_is_bare_object(thr, -1)); /* mappedNames */ /* [ ... formals arguments map mappedNames ] */ DUK_DDD(DUK_DDDPRINT("created arguments related objects: " "arguments at index %ld -> %!O " "map at index %ld -> %!O " "mappednames at index %ld -> %!O", (long) i_arg, (duk_heaphdr *) duk_get_hobject(thr, i_arg), (long) i_map, (duk_heaphdr *) duk_get_hobject(thr, i_map), (long) i_mappednames, (duk_heaphdr *) duk_get_hobject(thr, i_mappednames))); /* * Init arguments properties, map, etc. */ duk_push_int(thr, num_stack_args); duk_xdef_prop_stridx(thr, i_arg, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_WC); /* * Init argument related properties. */ /* step 11 */ idx = num_stack_args - 1; while (idx >= 0) { DUK_DDD(DUK_DDDPRINT("arg idx %ld, argbase=%ld, argidx=%ld", (long) idx, (long) i_argbase, (long) (i_argbase + idx))); DUK_DDD(DUK_DDDPRINT("define arguments[%ld]=arg", (long) idx)); duk_dup(thr, i_argbase + idx); duk_xdef_prop_index_wec(thr, i_arg, (duk_uarridx_t) idx); DUK_DDD(DUK_DDDPRINT("defined arguments[%ld]=arg", (long) idx)); /* step 11.c is relevant only if non-strict (checked in 11.c.ii) */ if (!DUK_HOBJECT_HAS_STRICT(func) && idx < n_formals) { DUK_ASSERT(formals != NULL); DUK_DDD(DUK_DDDPRINT("strict function, index within formals (%ld < %ld)", (long) idx, (long) n_formals)); duk_get_prop_index(thr, i_formals, (duk_uarridx_t) idx); DUK_ASSERT(duk_is_string(thr, -1)); duk_dup_top(thr); /* [ ... name name ] */ if (!duk_has_prop(thr, i_mappednames)) { /* steps 11.c.ii.1 - 11.c.ii.4, but our internal book-keeping * differs from the reference model */ /* [ ... name ] */ need_map = 1; DUK_DDD(DUK_DDDPRINT("set mappednames[%s]=%ld", (const char *) duk_get_string(thr, -1), (long) idx)); duk_dup_top(thr); /* name */ (void) duk_push_uint_to_hstring(thr, (duk_uint_t) idx); /* index */ duk_xdef_prop_wec(thr, i_mappednames); /* out of spec, must be configurable */ DUK_DDD(DUK_DDDPRINT("set map[%ld]=%s", (long) idx, duk_get_string(thr, -1))); duk_dup_top(thr); /* name */ duk_xdef_prop_index_wec(thr, i_map, (duk_uarridx_t) idx); /* out of spec, must be configurable */ } else { /* duk_has_prop() popped the second 'name' */ } /* [ ... name ] */ duk_pop(thr); /* pop 'name' */ } idx--; } DUK_DDD(DUK_DDDPRINT("actual arguments processed")); /* step 12 */ if (need_map) { DUK_DDD(DUK_DDDPRINT("adding 'map' and 'varenv' to arguments object")); /* should never happen for a strict callee */ DUK_ASSERT(!DUK_HOBJECT_HAS_STRICT(func)); duk_dup(thr, i_map); duk_xdef_prop_stridx(thr, i_arg, DUK_STRIDX_INT_MAP, DUK_PROPDESC_FLAGS_NONE); /* out of spec, don't care */ /* The variable environment for magic variable bindings needs to be * given by the caller and recorded in the arguments object. * * See E5 Section 10.6, the creation of setters/getters. * * The variable environment also provides access to the callee, so * an explicit (internal) callee property is not needed. */ duk_push_hobject(thr, varenv); duk_xdef_prop_stridx(thr, i_arg, DUK_STRIDX_INT_VARENV, DUK_PROPDESC_FLAGS_NONE); /* out of spec, don't care */ } /* steps 13-14 */ if (DUK_HOBJECT_HAS_STRICT(func)) { /* Callee/caller are throwers and are not deletable etc. They * could be implemented as virtual properties, but currently * there is no support for virtual properties which are accessors * (only plain virtual properties). This would not be difficult * to change in duk_hobject_props, but we can make the throwers * normal, concrete properties just as easily. * * Note that the specification requires that the *same* thrower * built-in object is used here! See E5 Section 10.6 main * algoritm, step 14, and Section 13.2.3 which describes the * thrower. See test case test-arguments-throwers.js. */ DUK_DDD(DUK_DDDPRINT("strict function, setting caller/callee to throwers")); /* In ES2017 .caller is no longer set at all. */ duk_xdef_prop_stridx_thrower(thr, i_arg, DUK_STRIDX_CALLEE); } else { DUK_DDD(DUK_DDDPRINT("non-strict function, setting callee to actual value")); duk_push_hobject(thr, func); duk_xdef_prop_stridx(thr, i_arg, DUK_STRIDX_CALLEE, DUK_PROPDESC_FLAGS_WC); } /* set exotic behavior only after we're done */ if (need_map) { /* Exotic behaviors are only enabled for arguments objects * which have a parameter map (see E5 Section 10.6 main * algorithm, step 12). * * In particular, a non-strict arguments object with no * mapped formals does *NOT* get exotic behavior, even * for e.g. "caller" property. This seems counterintuitive * but seems to be the case. */ /* cannot be strict (never mapped variables) */ DUK_ASSERT(!DUK_HOBJECT_HAS_STRICT(func)); DUK_DDD(DUK_DDDPRINT("enabling exotic behavior for arguments object")); DUK_HOBJECT_SET_EXOTIC_ARGUMENTS(arg); } else { DUK_DDD(DUK_DDDPRINT("not enabling exotic behavior for arguments object")); } DUK_DDD(DUK_DDDPRINT("final arguments related objects: " "arguments at index %ld -> %!O " "map at index %ld -> %!O " "mappednames at index %ld -> %!O", (long) i_arg, (duk_heaphdr *) duk_get_hobject(thr, i_arg), (long) i_map, (duk_heaphdr *) duk_get_hobject(thr, i_map), (long) i_mappednames, (duk_heaphdr *) duk_get_hobject(thr, i_mappednames))); /* [ args(n) envobj formals arguments map mappednames ] */ duk_pop_2(thr); duk_remove_m2(thr); /* [ args(n) envobj arguments ] */ } /* Helper for creating the arguments object and adding it to the env record * on top of the value stack. */ DUK_LOCAL void duk__handle_createargs_for_call(duk_hthread *thr, duk_hobject *func, duk_hobject *env, duk_idx_t idx_args) { DUK_DDD(DUK_DDDPRINT("creating arguments object for function call")); DUK_ASSERT(thr != NULL); DUK_ASSERT(func != NULL); DUK_ASSERT(env != NULL); DUK_ASSERT(DUK_HOBJECT_HAS_CREATEARGS(func)); /* [ ... arg1 ... argN envobj ] */ duk__create_arguments_object(thr, func, env, idx_args); /* [ ... arg1 ... argN envobj argobj ] */ duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LC_ARGUMENTS, DUK_HOBJECT_HAS_STRICT(func) ? DUK_PROPDESC_FLAGS_E : /* strict: non-deletable, non-writable */ DUK_PROPDESC_FLAGS_WE); /* non-strict: non-deletable, writable */ /* [ ... arg1 ... argN envobj ] */ } /* * Helpers for constructor call handling. * * There are two [[Construct]] operations in the specification: * * - E5 Section 13.2.2: for Function objects * - E5 Section 15.3.4.5.2: for "bound" Function objects * * The chain of bound functions is resolved in Section 15.3.4.5.2, * with arguments "piling up" until the [[Construct]] internal * method is called on the final, actual Function object. Note * that the "prototype" property is looked up *only* from the * final object, *before* calling the constructor. * * Since Duktape 2.2 bound functions are represented with the * duk_hboundfunc internal type, and bound function chains are * collapsed when a bound function is created. As a result, the * direct target of a duk_hboundfunc is always non-bound and the * this/argument lists have been resolved. * * When constructing new Array instances, an unnecessary object is * created and discarded now: the standard [[Construct]] creates an * object, and calls the Array constructor. The Array constructor * returns an Array instance, which is used as the result value for * the "new" operation; the object created before the Array constructor * call is discarded. * * This would be easy to fix, e.g. by knowing that the Array constructor * will always create a replacement object and skip creating the fallback * object in that case. */ /* Update default instance prototype for constructor call. */ DUK_LOCAL void duk__update_default_instance_proto(duk_hthread *thr, duk_idx_t idx_func) { duk_hobject *proto; duk_hobject *fallback; DUK_ASSERT(duk_is_constructable(thr, idx_func)); duk_get_prop_stridx_short(thr, idx_func, DUK_STRIDX_PROTOTYPE); proto = duk_get_hobject(thr, -1); if (proto == NULL) { DUK_DDD(DUK_DDDPRINT("constructor has no 'prototype' property, or value not an object " "-> leave standard Object prototype as fallback prototype")); } else { DUK_DDD(DUK_DDDPRINT("constructor has 'prototype' property with object value " "-> set fallback prototype to that value: %!iO", (duk_heaphdr *) proto)); /* Original fallback (default instance) is untouched when * resolving bound functions etc. */ fallback = duk_known_hobject(thr, idx_func + 1); DUK_ASSERT(fallback != NULL); DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, fallback, proto); } duk_pop(thr); } /* Postprocess: return value special handling, error augmentation. */ DUK_INTERNAL void duk_call_construct_postprocess(duk_hthread *thr, duk_small_uint_t proxy_invariant) { /* Use either fallback (default instance) or retval depending * on retval type. Needs to be called before unwind because * the default instance is read from the current (immutable) * 'this' binding. * * For Proxy 'construct' calls the return value must be an * Object (we accept object-like values like buffers and * lightfuncs too). If not, TypeError. */ if (duk_check_type_mask(thr, -1, DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_BUFFER | DUK_TYPE_MASK_LIGHTFUNC)) { DUK_DDD(DUK_DDDPRINT("replacement value")); } else { if (DUK_UNLIKELY(proxy_invariant != 0U)) { /* Proxy 'construct' return value invariant violated. */ DUK_ERROR_TYPE_INVALID_TRAP_RESULT(thr); DUK_WO_NORETURN(return;); } /* XXX: direct value stack access */ duk_pop(thr); duk_push_this(thr); } #if defined(DUK_USE_AUGMENT_ERROR_CREATE) /* Augment created errors upon creation, not when they are thrown or * rethrown. __FILE__ and __LINE__ are not desirable here; the call * stack reflects the caller which is correct. Skip topmost, unwound * activation when creating a traceback. If thr->ptr_curr_pc was != * NULL we'd need to sync the current PC so that the traceback comes * out right; however it is always synced here so just assert for it. */ DUK_ASSERT(thr->ptr_curr_pc == NULL); duk_err_augment_error_create(thr, thr, NULL, 0, DUK_AUGMENT_FLAG_NOBLAME_FILELINE | DUK_AUGMENT_FLAG_SKIP_ONE); #endif } /* * Helper for handling a bound function when a call is being made. * * Assumes that bound function chains have been "collapsed" so that either * the target is non-bound or there is one bound function that points to a * nonbound target. * * Prepends the bound arguments to the value stack (at idx_func + 2). * The 'this' binding is also updated if necessary (at idx_func + 1). * Note that for constructor calls the 'this' binding is never updated by * [[BoundThis]]. */ DUK_LOCAL void duk__handle_bound_chain_for_call(duk_hthread *thr, duk_idx_t idx_func, duk_bool_t is_constructor_call) { duk_tval *tv_func; duk_hobject *func; duk_idx_t len; DUK_ASSERT(thr != NULL); /* On entry, item at idx_func is a bound, non-lightweight function, * but we don't rely on that below. */ DUK_ASSERT(duk_get_top(thr) >= idx_func + 2); tv_func = duk_require_tval(thr, idx_func); DUK_ASSERT(tv_func != NULL); if (DUK_TVAL_IS_OBJECT(tv_func)) { func = DUK_TVAL_GET_OBJECT(tv_func); /* XXX: separate helper function, out of fast path? */ if (DUK_HOBJECT_HAS_BOUNDFUNC(func)) { duk_hboundfunc *h_bound; duk_tval *tv_args; duk_tval *tv_gap; h_bound = (duk_hboundfunc *) (void *) func; tv_args = h_bound->args; len = h_bound->nargs; DUK_ASSERT(len == 0 || tv_args != NULL); DUK_DDD(DUK_DDDPRINT("bound function encountered, ptr=%p: %!T", (void *) DUK_TVAL_GET_OBJECT(tv_func), tv_func)); /* [ ... func this arg1 ... argN ] */ if (is_constructor_call) { /* See: tests/ecmascript/test-spec-bound-constructor.js */ DUK_DDD(DUK_DDDPRINT("constructor call: don't update this binding")); } else { /* XXX: duk_replace_tval */ duk_push_tval(thr, &h_bound->this_binding); duk_replace(thr, idx_func + 1); /* idx_this = idx_func + 1 */ } /* [ ... func this arg1 ... argN ] */ duk_require_stack(thr, len); tv_gap = duk_reserve_gap(thr, idx_func + 2, len); duk_copy_tvals_incref(thr, tv_gap, tv_args, (duk_size_t) len); /* [ ... func this arg1 ... argN ] */ duk_push_tval(thr, &h_bound->target); duk_replace(thr, idx_func); /* replace in stack */ DUK_DDD(DUK_DDDPRINT("bound function handled, idx_func=%ld, curr func=%!T", (long) idx_func, duk_get_tval(thr, idx_func))); } } else if (DUK_TVAL_IS_LIGHTFUNC(tv_func)) { /* Lightweight function: never bound, so terminate. */ ; } else { /* Shouldn't happen, so ugly error is enough. */ DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return;); } DUK_ASSERT(duk_get_top(thr) >= idx_func + 2); DUK_DDD(DUK_DDDPRINT("final non-bound function is: %!T", duk_get_tval(thr, idx_func))); #if defined(DUK_USE_ASSERTIONS) tv_func = duk_require_tval(thr, idx_func); DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv_func) || DUK_TVAL_IS_OBJECT(tv_func)); if (DUK_TVAL_IS_OBJECT(tv_func)) { func = DUK_TVAL_GET_OBJECT(tv_func); DUK_ASSERT(func != NULL); DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(func)); DUK_ASSERT(DUK_HOBJECT_HAS_COMPFUNC(func) || DUK_HOBJECT_HAS_NATFUNC(func) || DUK_HOBJECT_IS_PROXY(func)); } #endif } /* * Helper for inline handling of .call(), .apply(), and .construct(). */ DUK_LOCAL duk_bool_t duk__handle_specialfuncs_for_call(duk_hthread *thr, duk_idx_t idx_func, duk_hobject *func, duk_small_uint_t *call_flags, duk_bool_t first) { #if defined(DUK_USE_ASSERTIONS) duk_c_function natfunc; #endif duk_tval *tv_args; DUK_ASSERT(func != NULL); DUK_ASSERT((*call_flags & DUK_CALL_FLAG_CONSTRUCT) == 0); /* Caller. */ #if defined(DUK_USE_ASSERTIONS) natfunc = ((duk_hnatfunc *) func)->func; DUK_ASSERT(natfunc != NULL); #endif /* On every round of function resolution at least target function and * 'this' binding are set. We can assume that here, and must guarantee * it on exit. Value stack reserve is extended for bound function and * .apply() unpacking so we don't need to extend it here when we need a * few slots. */ DUK_ASSERT(duk_get_top(thr) >= idx_func + 2); /* Handle native 'eval' specially. A direct eval check is only made * for the first resolution attempt; e.g. a bound eval call is -not- * a direct eval call. */ if (DUK_UNLIKELY(((duk_hnatfunc *) func)->magic == 15)) { /* For now no special handling except for direct eval * detection. */ DUK_ASSERT(((duk_hnatfunc *) func)->func == duk_bi_global_object_eval); if (first && (*call_flags & DUK_CALL_FLAG_CALLED_AS_EVAL)) { *call_flags = (*call_flags & ~DUK_CALL_FLAG_CALLED_AS_EVAL) | DUK_CALL_FLAG_DIRECT_EVAL; } DUK_ASSERT(duk_get_top(thr) >= idx_func + 2); return 1; /* stop resolving */ } /* Handle special functions based on the DUK_HOBJECT_FLAG_SPECIAL_CALL * flag; their magic value is used for switch-case. * * NOTE: duk_unpack_array_like() reserves value stack space * for the result values (unlike most other value stack calls). */ switch (((duk_hnatfunc *) func)->magic) { case 0: { /* 0=Function.prototype.call() */ /* Value stack: * idx_func + 0: Function.prototype.call() [removed] * idx_func + 1: this binding for .call (target function) * idx_func + 2: 1st argument to .call, desired 'this' binding * idx_func + 3: 2nd argument to .call, desired 1st argument for ultimate target * ... * * Remove idx_func + 0 to get: * idx_func + 0: target function * idx_func + 1: this binding * idx_func + 2: call arguments * ... */ DUK_ASSERT(natfunc == duk_bi_function_prototype_call); duk_remove_unsafe(thr, idx_func); tv_args = thr->valstack_bottom + idx_func + 2; if (thr->valstack_top < tv_args) { DUK_ASSERT(tv_args <= thr->valstack_end); thr->valstack_top = tv_args; /* at least target function and 'this' binding present */ } break; } case 1: { /* 1=Function.prototype.apply() */ /* Value stack: * idx_func + 0: Function.prototype.apply() [removed] * idx_func + 1: this binding for .apply (target function) * idx_func + 2: 1st argument to .apply, desired 'this' binding * idx_func + 3: 2nd argument to .apply, argArray * [anything after this MUST be ignored] * * Remove idx_func + 0 and unpack the argArray to get: * idx_func + 0: target function * idx_func + 1: this binding * idx_func + 2: call arguments * ... */ DUK_ASSERT(natfunc == duk_bi_function_prototype_apply); duk_remove_unsafe(thr, idx_func); goto apply_shared; } #if defined(DUK_USE_REFLECT_BUILTIN) case 2: { /* 2=Reflect.apply() */ /* Value stack: * idx_func + 0: Reflect.apply() [removed] * idx_func + 1: this binding for .apply (ignored, usually Reflect) [removed] * idx_func + 2: 1st argument to .apply, target function * idx_func + 3: 2nd argument to .apply, desired 'this' binding * idx_func + 4: 3rd argument to .apply, argArray * [anything after this MUST be ignored] * * Remove idx_func + 0 and idx_func + 1, and unpack the argArray to get: * idx_func + 0: target function * idx_func + 1: this binding * idx_func + 2: call arguments * ... */ DUK_ASSERT(natfunc == duk_bi_reflect_apply); duk_remove_n_unsafe(thr, idx_func, 2); goto apply_shared; } case 3: { /* 3=Reflect.construct() */ /* Value stack: * idx_func + 0: Reflect.construct() [removed] * idx_func + 1: this binding for .construct (ignored, usually Reflect) [removed] * idx_func + 2: 1st argument to .construct, target function * idx_func + 3: 2nd argument to .construct, argArray * idx_func + 4: 3rd argument to .construct, newTarget * [anything after this MUST be ignored] * * Remove idx_func + 0 and idx_func + 1, unpack the argArray, * and insert default instance (prototype not yet updated), to get: * idx_func + 0: target function * idx_func + 1: this binding (default instance) * idx_func + 2: constructor call arguments * ... * * Call flags must be updated to reflect the fact that we're * now dealing with a constructor call, and e.g. the 'this' * binding cannot be overwritten if the target is bound. * * newTarget is checked but not yet passed onwards. */ duk_idx_t top; DUK_ASSERT(natfunc == duk_bi_reflect_construct); *call_flags |= DUK_CALL_FLAG_CONSTRUCT; duk_remove_n_unsafe(thr, idx_func, 2); top = duk_get_top(thr); if (!duk_is_constructable(thr, idx_func)) { /* Target constructability must be checked before * unpacking argArray (which may cause side effects). * Just return; caller will throw the error. */ duk_set_top_unsafe(thr, idx_func + 2); /* satisfy asserts */ break; } duk_push_object(thr); duk_insert(thr, idx_func + 1); /* default instance */ /* [ ... func default_instance argArray newTarget? ] */ top = duk_get_top(thr); if (top < idx_func + 3) { /* argArray is a mandatory argument for Reflect.construct(). */ DUK_ERROR_TYPE_INVALID_ARGS(thr); DUK_WO_NORETURN(return 0;); } if (top > idx_func + 3) { if (!duk_strict_equals(thr, idx_func, idx_func + 3)) { /* XXX: [[Construct]] newTarget currently unsupported */ DUK_ERROR_UNSUPPORTED(thr); DUK_WO_NORETURN(return 0;); } duk_set_top_unsafe(thr, idx_func + 3); /* remove any args beyond argArray */ } DUK_ASSERT(duk_get_top(thr) == idx_func + 3); DUK_ASSERT(duk_is_valid_index(thr, idx_func + 2)); (void) duk_unpack_array_like(thr, idx_func + 2); /* XXX: should also remove target to be symmetric with duk_pack()? */ duk_remove(thr, idx_func + 2); DUK_ASSERT(duk_get_top(thr) >= idx_func + 2); break; } #endif /* DUK_USE_REFLECT_BUILTIN */ default: { DUK_ASSERT(0); DUK_UNREACHABLE(); } } DUK_ASSERT(duk_get_top(thr) >= idx_func + 2); return 0; /* keep resolving */ apply_shared: tv_args = thr->valstack_bottom + idx_func + 2; if (thr->valstack_top <= tv_args) { DUK_ASSERT(tv_args <= thr->valstack_end); thr->valstack_top = tv_args; /* at least target func and 'this' binding present */ /* No need to check for argArray. */ } else { DUK_ASSERT(duk_get_top(thr) >= idx_func + 3); /* idx_func + 2 covered above */ if (thr->valstack_top > tv_args + 1) { duk_set_top_unsafe(thr, idx_func + 3); /* remove any args beyond argArray */ } DUK_ASSERT(duk_is_valid_index(thr, idx_func + 2)); if (!duk_is_callable(thr, idx_func)) { /* Avoid unpack side effects if the target isn't callable. * Calling code will throw the actual error. */ } else { (void) duk_unpack_array_like(thr, idx_func + 2); duk_remove(thr, idx_func + 2); } } DUK_ASSERT(duk_get_top(thr) >= idx_func + 2); return 0; /* keep resolving */ } /* * Helper for Proxy handling. */ #if defined(DUK_USE_ES6_PROXY) DUK_LOCAL void duk__handle_proxy_for_call(duk_hthread *thr, duk_idx_t idx_func, duk_hproxy *h_proxy, duk_small_uint_t *call_flags) { duk_bool_t rc; /* Value stack: * idx_func + 0: Proxy object * idx_func + 1: this binding for call * idx_func + 2: 1st argument for call * idx_func + 3: 2nd argument for call * ... * * If Proxy doesn't have a trap for the call ('apply' or 'construct'), * replace Proxy object with target object. * * If we're dealing with a normal call and the Proxy has an 'apply' * trap, manipulate value stack to: * * idx_func + 0: trap * idx_func + 1: Proxy's handler * idx_func + 2: Proxy's target * idx_func + 3: this binding for call (from idx_func + 1) * idx_func + 4: call arguments packed to an array * * If we're dealing with a constructor call and the Proxy has a * 'construct' trap, manipulate value stack to: * * idx_func + 0: trap * idx_func + 1: Proxy's handler * idx_func + 2: Proxy's target * idx_func + 3: call arguments packed to an array * idx_func + 4: newTarget == Proxy object here * * As we don't yet have proper newTarget support, the newTarget at * idx_func + 3 is just the original constructor being called, i.e. * the Proxy object (not the target). Note that the default instance * (original 'this' binding) is dropped and ignored. */ duk_push_hobject(thr, h_proxy->handler); rc = duk_get_prop_stridx_short(thr, -1, (*call_flags & DUK_CALL_FLAG_CONSTRUCT) ? DUK_STRIDX_CONSTRUCT : DUK_STRIDX_APPLY); if (rc == 0) { /* Not found, continue to target. If this is a construct * call, update default instance prototype using the Proxy, * not the target. */ if (*call_flags & DUK_CALL_FLAG_CONSTRUCT) { if (!(*call_flags & DUK_CALL_FLAG_DEFAULT_INSTANCE_UPDATED)) { *call_flags |= DUK_CALL_FLAG_DEFAULT_INSTANCE_UPDATED; duk__update_default_instance_proto(thr, idx_func); } } duk_pop_2(thr); duk_push_hobject(thr, h_proxy->target); duk_replace(thr, idx_func); return; } /* Here we must be careful not to replace idx_func while * h_proxy is still needed, otherwise h_proxy may become * dangling. This could be improved e.g. using a * duk_pack_slice() with a freeform slice. */ /* Here: * idx_func + 0: Proxy object * idx_func + 1: this binding for call * idx_func + 2: 1st argument for call * idx_func + 3: 2nd argument for call * ... * idx_func + N: handler * idx_func + N + 1: trap */ duk_insert(thr, idx_func + 1); duk_insert(thr, idx_func + 2); duk_push_hobject(thr, h_proxy->target); duk_insert(thr, idx_func + 3); duk_pack(thr, duk_get_top(thr) - (idx_func + 5)); DUK_ASSERT(!duk_is_bare_object(thr, -1)); /* Here: * idx_func + 0: Proxy object * idx_func + 1: trap * idx_func + 2: Proxy's handler * idx_func + 3: Proxy's target * idx_func + 4: this binding for call * idx_func + 5: arguments array */ DUK_ASSERT(duk_get_top(thr) == idx_func + 6); if (*call_flags & DUK_CALL_FLAG_CONSTRUCT) { *call_flags |= DUK_CALL_FLAG_CONSTRUCT_PROXY; /* Enable 'construct' trap return invariant check. */ *call_flags &= ~(DUK_CALL_FLAG_CONSTRUCT); /* Resume as non-constructor call to the trap. */ /* 'apply' args: target, thisArg, argArray * 'construct' args: target, argArray, newTarget */ duk_remove(thr, idx_func + 4); duk_push_hobject(thr, (duk_hobject *) h_proxy); } /* Finalize value stack layout by removing Proxy reference. */ duk_remove(thr, idx_func); h_proxy = NULL; /* invalidated */ DUK_ASSERT(duk_get_top(thr) == idx_func + 5); } #endif /* DUK_USE_ES6_PROXY */ /* * Helper for setting up var_env and lex_env of an activation, * assuming it does NOT have the DUK_HOBJECT_FLAG_NEWENV flag. */ DUK_LOCAL void duk__handle_oldenv_for_call(duk_hthread *thr, duk_hobject *func, duk_activation *act) { duk_hcompfunc *f; duk_hobject *h_lex; duk_hobject *h_var; DUK_ASSERT(thr != NULL); DUK_ASSERT(func != NULL); DUK_ASSERT(act != NULL); DUK_ASSERT(!DUK_HOBJECT_HAS_NEWENV(func)); DUK_ASSERT(!DUK_HOBJECT_HAS_CREATEARGS(func)); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(func)); DUK_UNREF(thr); f = (duk_hcompfunc *) func; h_lex = DUK_HCOMPFUNC_GET_LEXENV(thr->heap, f); h_var = DUK_HCOMPFUNC_GET_VARENV(thr->heap, f); DUK_ASSERT(h_lex != NULL); /* Always true for closures (not for templates) */ DUK_ASSERT(h_var != NULL); act->lex_env = h_lex; act->var_env = h_var; DUK_HOBJECT_INCREF(thr, h_lex); DUK_HOBJECT_INCREF(thr, h_var); } /* * Helper for updating callee 'caller' property. */ #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) DUK_LOCAL void duk__update_func_caller_prop(duk_hthread *thr, duk_hobject *func) { duk_tval *tv_caller; duk_hobject *h_tmp; duk_activation *act_callee; duk_activation *act_caller; DUK_ASSERT(thr != NULL); DUK_ASSERT(func != NULL); DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(func)); /* bound chain resolved */ DUK_ASSERT(thr->callstack_top >= 1); if (DUK_HOBJECT_HAS_STRICT(func)) { /* Strict functions don't get their 'caller' updated. */ return; } DUK_ASSERT(thr->callstack_top > 0); act_callee = thr->callstack_curr; DUK_ASSERT(act_callee != NULL); act_caller = (thr->callstack_top >= 2 ? act_callee->parent : NULL); /* XXX: check .caller writability? */ /* Backup 'caller' property and update its value. */ tv_caller = duk_hobject_find_entry_tval_ptr_stridx(thr->heap, func, DUK_STRIDX_CALLER); if (tv_caller) { /* If caller is global/eval code, 'caller' should be set to * 'null'. * * XXX: there is no exotic flag to infer this correctly now. * The NEWENV flag is used now which works as intended for * everything (global code, non-strict eval code, and functions) * except strict eval code. Bound functions are never an issue * because 'func' has been resolved to a non-bound function. */ if (act_caller != NULL) { /* act_caller->func may be NULL in some finalization cases, * just treat like we don't know the caller. */ if (act_caller->func && !DUK_HOBJECT_HAS_NEWENV(act_caller->func)) { /* Setting to NULL causes 'caller' to be set to * 'null' as desired. */ act_caller = NULL; } } if (DUK_TVAL_IS_OBJECT(tv_caller)) { h_tmp = DUK_TVAL_GET_OBJECT(tv_caller); DUK_ASSERT(h_tmp != NULL); act_callee->prev_caller = h_tmp; /* Previous value doesn't need refcount changes because its ownership * is transferred to prev_caller. */ if (act_caller != NULL) { DUK_ASSERT(act_caller->func != NULL); DUK_TVAL_SET_OBJECT(tv_caller, act_caller->func); DUK_TVAL_INCREF(thr, tv_caller); } else { DUK_TVAL_SET_NULL(tv_caller); /* no incref */ } } else { /* 'caller' must only take on 'null' or function value */ DUK_ASSERT(!DUK_TVAL_IS_HEAP_ALLOCATED(tv_caller)); DUK_ASSERT(act_callee->prev_caller == NULL); if (act_caller != NULL && act_caller->func) { /* Tolerate act_caller->func == NULL which happens in * some finalization cases; treat like unknown caller. */ DUK_TVAL_SET_OBJECT(tv_caller, act_caller->func); DUK_TVAL_INCREF(thr, tv_caller); } else { DUK_TVAL_SET_NULL(tv_caller); /* no incref */ } } } } #endif /* DUK_USE_NONSTD_FUNC_CALLER_PROPERTY */ /* * Shared helpers for resolving the final, non-bound target function of the * call and the effective 'this' binding. Resolves bound functions and * applies .call(), .apply(), and .construct() inline. * * Proxy traps are also handled inline so that if the target is a Proxy with * a 'call' or 'construct' trap, the trap handler is called with a modified * argument list. * * Once the bound function / .call() / .apply() / .construct() sequence has * been resolved, the value at idx_func + 1 may need coercion described in * E5 Section 10.4.3. * * A call that begins as a non-constructor call may be converted into a * constructor call during the resolution process if Reflect.construct() * is invoked. This is handled by updating the caller's call_flags. * * For global and eval code (E5 Sections 10.4.1 and 10.4.2), we assume * that the caller has provided the correct 'this' binding explicitly * when calling, i.e.: * * - global code: this=global object * - direct eval: this=copy from eval() caller's this binding * - other eval: this=global object * * The 'this' coercion may cause a recursive function call with arbitrary * side effects, because ToObject() may be called. */ DUK_LOCAL DUK_INLINE void duk__coerce_nonstrict_this_binding(duk_hthread *thr, duk_idx_t idx_this) { duk_tval *tv_this; duk_hobject *obj_global; tv_this = thr->valstack_bottom + idx_this; switch (DUK_TVAL_GET_TAG(tv_this)) { case DUK_TAG_OBJECT: DUK_DDD(DUK_DDDPRINT("this binding: non-strict, object -> use directly")); break; case DUK_TAG_UNDEFINED: case DUK_TAG_NULL: DUK_DDD(DUK_DDDPRINT("this binding: non-strict, undefined/null -> use global object")); obj_global = thr->builtins[DUK_BIDX_GLOBAL]; /* XXX: avoid this check somehow */ if (DUK_LIKELY(obj_global != NULL)) { DUK_ASSERT(!DUK_TVAL_IS_HEAP_ALLOCATED(tv_this)); /* no need to decref previous value */ DUK_TVAL_SET_OBJECT(tv_this, obj_global); DUK_HOBJECT_INCREF(thr, obj_global); } else { /* This may only happen if built-ins are being "torn down". * This behavior is out of specification scope. */ DUK_D(DUK_DPRINT("this binding: wanted to use global object, but it is NULL -> using undefined instead")); DUK_ASSERT(!DUK_TVAL_IS_HEAP_ALLOCATED(tv_this)); /* no need to decref previous value */ DUK_TVAL_SET_UNDEFINED(tv_this); /* nothing to incref */ } break; default: /* Plain buffers and lightfuncs are object coerced. Lightfuncs * very rarely come here however, because the call target would * need to be a non-strict non-lightfunc (lightfuncs are considered * strict) with an explicit lightfunc 'this' binding. */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_this)); DUK_DDD(DUK_DDDPRINT("this binding: non-strict, not object/undefined/null -> use ToObject(value)")); duk_to_object(thr, idx_this); /* may have side effects */ break; } } DUK_LOCAL DUK_ALWAYS_INLINE duk_bool_t duk__resolve_target_fastpath_check(duk_hthread *thr, duk_idx_t idx_func, duk_hobject **out_func, duk_small_uint_t call_flags) { #if defined(DUK_USE_PREFER_SIZE) DUK_UNREF(thr); DUK_UNREF(idx_func); DUK_UNREF(out_func); DUK_UNREF(call_flags); #else /* DUK_USE_PREFER_SIZE */ duk_tval *tv_func; duk_hobject *func; if (DUK_UNLIKELY(call_flags & DUK_CALL_FLAG_CONSTRUCT)) { return 0; } tv_func = DUK_GET_TVAL_POSIDX(thr, idx_func); DUK_ASSERT(tv_func != NULL); if (DUK_LIKELY(DUK_TVAL_IS_OBJECT(tv_func))) { func = DUK_TVAL_GET_OBJECT(tv_func); if (DUK_HOBJECT_IS_CALLABLE(func) && !DUK_HOBJECT_HAS_BOUNDFUNC(func) && !DUK_HOBJECT_HAS_SPECIAL_CALL(func)) { *out_func = func; if (DUK_HOBJECT_HAS_STRICT(func)) { /* Strict function: no 'this' coercion. */ return 1; } duk__coerce_nonstrict_this_binding(thr, idx_func + 1); return 1; } } else if (DUK_TVAL_IS_LIGHTFUNC(tv_func)) { *out_func = NULL; /* Lightfuncs are considered strict, so 'this' binding is * used as is. They're never bound, always constructable, * and never special functions. */ return 1; } #endif /* DUK_USE_PREFER_SIZE */ return 0; /* let slow path deal with it */ } DUK_LOCAL duk_hobject *duk__resolve_target_func_and_this_binding(duk_hthread *thr, duk_idx_t idx_func, duk_small_uint_t *call_flags) { duk_tval *tv_func; duk_hobject *func; duk_bool_t first; DUK_ASSERT(duk_get_top(thr) >= idx_func + 2); for (first = 1;; first = 0) { DUK_ASSERT(duk_get_top(thr) >= idx_func + 2); tv_func = DUK_GET_TVAL_POSIDX(thr, idx_func); DUK_ASSERT(tv_func != NULL); DUK_DD(DUK_DDPRINT("target func: %!iT", tv_func)); if (DUK_TVAL_IS_OBJECT(tv_func)) { func = DUK_TVAL_GET_OBJECT(tv_func); if (*call_flags & DUK_CALL_FLAG_CONSTRUCT) { if (DUK_UNLIKELY(!DUK_HOBJECT_HAS_CONSTRUCTABLE(func))) { goto not_constructable; } } else { if (DUK_UNLIKELY(!DUK_HOBJECT_IS_CALLABLE(func))) { goto not_callable; } } if (DUK_LIKELY(!DUK_HOBJECT_HAS_BOUNDFUNC(func) && !DUK_HOBJECT_HAS_SPECIAL_CALL(func) && !DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(func))) { /* Common case, so test for using a single bitfield test. * Break out to handle this coercion etc. */ break; } /* XXX: could set specialcall for boundfuncs too, simplify check above */ if (DUK_HOBJECT_HAS_BOUNDFUNC(func)) { DUK_ASSERT(!DUK_HOBJECT_HAS_SPECIAL_CALL(func)); DUK_ASSERT(!DUK_HOBJECT_IS_NATFUNC(func)); /* Callable/constructable flags are the same * for the bound function and its target, so * we don't need to check them here, we can * check them from the target only. */ duk__handle_bound_chain_for_call(thr, idx_func, *call_flags & DUK_CALL_FLAG_CONSTRUCT); DUK_ASSERT(DUK_TVAL_IS_OBJECT(duk_require_tval(thr, idx_func)) || DUK_TVAL_IS_LIGHTFUNC(duk_require_tval(thr, idx_func))); } else { DUK_ASSERT(DUK_HOBJECT_HAS_SPECIAL_CALL(func)); #if defined(DUK_USE_ES6_PROXY) if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(func)) { /* If no trap, resume processing from Proxy trap. * If trap exists, helper converts call into a trap * call; this may change a constructor call into a * normal (non-constructor) trap call. We must * continue processing even when a trap is found as * the trap may be bound. */ duk__handle_proxy_for_call(thr, idx_func, (duk_hproxy *) func, call_flags); } else #endif { DUK_ASSERT(DUK_HOBJECT_IS_NATFUNC(func)); DUK_ASSERT(DUK_HOBJECT_HAS_CALLABLE(func)); DUK_ASSERT(!DUK_HOBJECT_HAS_CONSTRUCTABLE(func)); /* Constructable check already done above. */ if (duk__handle_specialfuncs_for_call(thr, idx_func, func, call_flags, first) != 0) { /* Encountered native eval call, normal call * context. Break out, handle this coercion etc. */ break; } } } /* Retry loop. */ } else if (DUK_TVAL_IS_LIGHTFUNC(tv_func)) { /* Lightfuncs are: * - Always strict, so no 'this' coercion. * - Always callable. * - Always constructable. * - Never specialfuncs. */ func = NULL; goto finished; } else { goto not_callable; } } DUK_ASSERT(func != NULL); if (!DUK_HOBJECT_HAS_STRICT(func)) { /* Non-strict target needs 'this' coercion. * This has potential side effects invalidating * 'tv_func'. */ duk__coerce_nonstrict_this_binding(thr, idx_func + 1); } if (*call_flags & DUK_CALL_FLAG_CONSTRUCT) { if (!(*call_flags & DUK_CALL_FLAG_DEFAULT_INSTANCE_UPDATED)) { *call_flags |= DUK_CALL_FLAG_DEFAULT_INSTANCE_UPDATED; duk__update_default_instance_proto(thr, idx_func); } } finished: #if defined(DUK_USE_ASSERTIONS) { duk_tval *tv_tmp; tv_tmp = duk_get_tval(thr, idx_func); DUK_ASSERT(tv_tmp != NULL); DUK_ASSERT((DUK_TVAL_IS_OBJECT(tv_tmp) && DUK_HOBJECT_IS_CALLABLE(DUK_TVAL_GET_OBJECT(tv_tmp))) || DUK_TVAL_IS_LIGHTFUNC(tv_tmp)); DUK_ASSERT(func == NULL || !DUK_HOBJECT_HAS_BOUNDFUNC(func)); DUK_ASSERT(func == NULL || (DUK_HOBJECT_IS_COMPFUNC(func) || DUK_HOBJECT_IS_NATFUNC(func))); DUK_ASSERT(func == NULL || (DUK_HOBJECT_HAS_CONSTRUCTABLE(func) || (*call_flags & DUK_CALL_FLAG_CONSTRUCT) == 0)); } #endif return func; not_callable: DUK_ASSERT(tv_func != NULL); #if defined(DUK_USE_VERBOSE_ERRORS) /* GETPROPC delayed error handling: when target is not callable, * GETPROPC replaces idx_func+0 with a non-callable wrapper object * with a hidden Symbol to signify it's to be handled here. If * found, unwrap the original Error and throw it as is here. The * hidden Symbol is only checked as an own property, not inherited * (which would be dangerous). */ if (DUK_TVAL_IS_OBJECT(tv_func)) { duk_tval *tv_wrap = duk_hobject_find_entry_tval_ptr_stridx(thr->heap, DUK_TVAL_GET_OBJECT(tv_func), DUK_STRIDX_INT_TARGET); if (tv_wrap != NULL) { DUK_DD(DUK_DDPRINT("delayed error from GETPROPC: %!T", tv_wrap)); duk_push_tval(thr, tv_wrap); (void) duk_throw(thr); DUK_WO_NORETURN(return NULL;); } } #endif #if defined(DUK_USE_VERBOSE_ERRORS) #if defined(DUK_USE_PARANOID_ERRORS) DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "%s not callable", duk_get_type_name(thr, idx_func)); #else DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "%s not callable", duk_push_string_tval_readable(thr, tv_func)); #endif #else DUK_ERROR_TYPE(thr, DUK_STR_NOT_CALLABLE); #endif DUK_WO_NORETURN(return NULL;); not_constructable: /* For now GETPROPC delayed error not needed for constructor calls. */ #if defined(DUK_USE_VERBOSE_ERRORS) #if defined(DUK_USE_PARANOID_ERRORS) DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "%s not constructable", duk_get_type_name(thr, idx_func)); #else DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "%s not constructable", duk_push_string_tval_readable(thr, tv_func)); #endif #else DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONSTRUCTABLE); #endif DUK_WO_NORETURN(return NULL;); } /* * Manipulate value stack so that exactly 'num_stack_rets' return * values are at 'idx_retbase' in every case, assuming there are * 'rc' return values on top of stack. * * This is a bit tricky, because the called C function operates in * the same activation record and may have e.g. popped the stack * empty (below idx_retbase). */ DUK_LOCAL void duk__safe_call_adjust_valstack(duk_hthread *thr, duk_idx_t idx_retbase, duk_idx_t num_stack_rets, duk_idx_t num_actual_rets) { duk_idx_t idx_rcbase; DUK_ASSERT(thr != NULL); DUK_ASSERT(idx_retbase >= 0); DUK_ASSERT(num_stack_rets >= 0); DUK_ASSERT(num_actual_rets >= 0); idx_rcbase = duk_get_top(thr) - num_actual_rets; /* base of known return values */ if (DUK_UNLIKELY(idx_rcbase < 0)) { DUK_ERROR_TYPE(thr, DUK_STR_INVALID_CFUNC_RC); DUK_WO_NORETURN(return;); } DUK_DDD(DUK_DDDPRINT("adjust valstack after func call: " "num_stack_rets=%ld, num_actual_rets=%ld, stack_top=%ld, idx_retbase=%ld, idx_rcbase=%ld", (long) num_stack_rets, (long) num_actual_rets, (long) duk_get_top(thr), (long) idx_retbase, (long) idx_rcbase)); DUK_ASSERT(idx_rcbase >= 0); /* caller must check */ /* Space for num_stack_rets was reserved before the safe call. * Because value stack reserve cannot shrink except in call returns, * the reserve is still in place. Adjust valstack, carefully * ensuring we don't overstep the reserve. */ /* Match idx_rcbase with idx_retbase so that the return values * start at the correct index. */ if (idx_rcbase > idx_retbase) { duk_idx_t count = idx_rcbase - idx_retbase; DUK_DDD(DUK_DDDPRINT("elements at/after idx_retbase have enough to cover func retvals " "(idx_retbase=%ld, idx_rcbase=%ld)", (long) idx_retbase, (long) idx_rcbase)); /* Remove values between irc_rcbase (start of intended return * values) and idx_retbase to lower return values to idx_retbase. */ DUK_ASSERT(count > 0); duk_remove_n(thr, idx_retbase, count); /* may be NORZ */ } else { duk_idx_t count = idx_retbase - idx_rcbase; DUK_DDD(DUK_DDDPRINT("not enough elements at/after idx_retbase to cover func retvals " "(idx_retbase=%ld, idx_rcbase=%ld)", (long) idx_retbase, (long) idx_rcbase)); /* Insert 'undefined' at idx_rcbase (start of intended return * values) to lift return values to idx_retbase. */ DUK_ASSERT(count >= 0); DUK_ASSERT(thr->valstack_end - thr->valstack_top >= count); /* reserve cannot shrink */ duk_insert_undefined_n(thr, idx_rcbase, count); } /* Chop extra retvals away / extend with undefined. */ duk_set_top_unsafe(thr, idx_retbase + num_stack_rets); } /* * Activation setup for tailcalls and non-tailcalls. */ #if defined(DUK_USE_TAILCALL) DUK_LOCAL duk_small_uint_t duk__call_setup_act_attempt_tailcall(duk_hthread *thr, duk_small_uint_t call_flags, duk_idx_t idx_func, duk_hobject *func, duk_size_t entry_valstack_bottom_byteoff, duk_size_t entry_valstack_end_byteoff, duk_idx_t *out_nargs, duk_idx_t *out_nregs, duk_size_t *out_vs_min_bytes, duk_activation **out_act) { duk_activation *act; duk_tval *tv1, *tv2; duk_idx_t idx_args; duk_small_uint_t flags1, flags2; #if defined(DUK_USE_DEBUGGER_SUPPORT) duk_activation *prev_pause_act; #endif DUK_UNREF(entry_valstack_end_byteoff); /* Tailcall cannot be flagged to resume calls, and a * previous frame must exist. */ DUK_ASSERT(thr->callstack_top >= 1); act = thr->callstack_curr; DUK_ASSERT(act != NULL); *out_act = act; if (func == NULL || !DUK_HOBJECT_IS_COMPFUNC(func)) { DUK_DDD(DUK_DDDPRINT("tail call prevented by target not being ecma function")); return 0; } if (act->flags & DUK_ACT_FLAG_PREVENT_YIELD) { DUK_DDD(DUK_DDDPRINT("tail call prevented by current activation having DUK_ACT_FLAG_PREVENT_YIELD")); return 0; } /* Tailcall is only allowed if current and candidate * function have identical return value handling. There * are three possible return value handling cases: * 1. Normal function call, no special return value handling. * 2. Constructor call, return value replacement object check. * 3. Proxy 'construct' trap call, return value invariant check. */ flags1 = (duk_small_uint_t) ((act->flags & DUK_ACT_FLAG_CONSTRUCT) ? 1 : 0) #if defined(DUK_USE_ES6_PROXY) | (duk_small_uint_t) ((act->flags & DUK_ACT_FLAG_CONSTRUCT_PROXY) ? 2 : 0) #endif ; flags2 = (duk_small_uint_t) ((call_flags & DUK_CALL_FLAG_CONSTRUCT) ? 1 : 0) #if defined(DUK_USE_ES6_PROXY) | (duk_small_uint_t) ((call_flags & DUK_CALL_FLAG_CONSTRUCT_PROXY) ? 2 : 0); #endif ; if (flags1 != flags2) { DUK_DDD(DUK_DDDPRINT("tail call prevented by incompatible return value handling")); return 0; } DUK_ASSERT(((act->flags & DUK_ACT_FLAG_CONSTRUCT) && (call_flags & DUK_CALL_FLAG_CONSTRUCT)) || (!(act->flags & DUK_ACT_FLAG_CONSTRUCT) && !(call_flags & DUK_CALL_FLAG_CONSTRUCT))); DUK_ASSERT(((act->flags & DUK_ACT_FLAG_CONSTRUCT_PROXY) && (call_flags & DUK_CALL_FLAG_CONSTRUCT_PROXY)) || (!(act->flags & DUK_ACT_FLAG_CONSTRUCT_PROXY) && !(call_flags & DUK_CALL_FLAG_CONSTRUCT_PROXY))); if (DUK_HOBJECT_HAS_NOTAIL(func)) { /* See: test-bug-tailcall-preventyield-assert.c. */ DUK_DDD(DUK_DDDPRINT("tail call prevented by function having a notail flag")); return 0; } /* * Tailcall handling * * Although the callstack entry is reused, we need to explicitly unwind * the current activation (or simulate an unwind). In particular, the * current activation must be closed, otherwise something like * test-bug-reduce-judofyr.js results. Also catchers need to be unwound * because there may be non-error-catching label entries in valid tail calls. * * Special attention is needed for debugger and pause behavior when * reusing an activation. * - Disable StepOut processing for the activation unwind because * we reuse the activation, see: * https://github.com/svaarala/duktape/issues/1684. * - Disable line change pause flag permanently if act == dbg_pause_act * (if set) because it would no longer be relevant, see: * https://github.com/svaarala/duktape/issues/1726, * https://github.com/svaarala/duktape/issues/1786. * - Check for function entry (e.g. StepInto) pause flag here, because * the executor pause check won't trigger due to shared activation, see: * https://github.com/svaarala/duktape/issues/1726. */ DUK_DDD(DUK_DDDPRINT("is tail call, reusing activation at callstack top, at index %ld", (long) (thr->callstack_top - 1))); DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(func)); DUK_ASSERT(!DUK_HOBJECT_HAS_NATFUNC(func)); DUK_ASSERT(DUK_HOBJECT_HAS_COMPFUNC(func)); DUK_ASSERT((act->flags & DUK_ACT_FLAG_PREVENT_YIELD) == 0); DUK_ASSERT(call_flags & DUK_CALL_FLAG_ALLOW_ECMATOECMA); /* Unwind the topmost callstack entry before reusing it. This * also unwinds the catchers related to the topmost entry. */ DUK_ASSERT(thr->callstack_top > 0); DUK_ASSERT(thr->callstack_curr != NULL); #if defined(DUK_USE_DEBUGGER_SUPPORT) if (act == thr->heap->dbg_pause_act) { thr->heap->dbg_pause_flags &= ~DUK_PAUSE_FLAG_LINE_CHANGE; } prev_pause_act = thr->heap->dbg_pause_act; thr->heap->dbg_pause_act = NULL; if (thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_FUNC_ENTRY) { DUK_D(DUK_DPRINT("PAUSE TRIGGERED by function entry (tailcall)")); duk_debug_set_paused(thr->heap); } #endif duk_hthread_activation_unwind_reuse_norz(thr); #if defined(DUK_USE_DEBUGGER_SUPPORT) thr->heap->dbg_pause_act = prev_pause_act; #endif DUK_ASSERT(act == thr->callstack_curr); /* XXX: We could restore the caller's value stack reserve * here, as if we did an actual unwind-and-call. Without * the restoration, value stack reserve may remain higher * than would otherwise be possible until we return to a * non-tailcall. */ /* Then reuse the unwound activation. */ act->cat = NULL; act->var_env = NULL; act->lex_env = NULL; DUK_ASSERT(func != NULL); DUK_ASSERT(DUK_HOBJECT_HAS_COMPFUNC(func)); act->func = func; /* don't want an intermediate exposed state with func == NULL */ #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) act->prev_caller = NULL; #endif /* don't want an intermediate exposed state with invalid pc */ act->curr_pc = DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, (duk_hcompfunc *) func); #if defined(DUK_USE_DEBUGGER_SUPPORT) act->prev_line = 0; #endif DUK_TVAL_SET_OBJECT(&act->tv_func, func); /* borrowed, no refcount */ DUK_HOBJECT_INCREF(thr, func); act->flags = DUK_ACT_FLAG_TAILCALLED; if (DUK_HOBJECT_HAS_STRICT(func)) { act->flags |= DUK_ACT_FLAG_STRICT; } if (call_flags & DUK_CALL_FLAG_CONSTRUCT) { act->flags |= DUK_ACT_FLAG_CONSTRUCT; } #if defined(DUK_USE_ES6_PROXY) if (call_flags & DUK_CALL_FLAG_CONSTRUCT_PROXY) { act->flags |= DUK_ACT_FLAG_CONSTRUCT_PROXY; } #endif DUK_ASSERT(DUK_ACT_GET_FUNC(act) == func); /* already updated */ DUK_ASSERT(act->var_env == NULL); DUK_ASSERT(act->lex_env == NULL); act->bottom_byteoff = entry_valstack_bottom_byteoff; /* tail call -> reuse current "frame" */ #if 0 /* Topmost activation retval_byteoff is considered garbage, no need to init. */ act->retval_byteoff = 0; #endif /* Filled in when final reserve is known, dummy value doesn't matter * even in error unwind because reserve_byteoff is only used when * returning to -this- activation. */ act->reserve_byteoff = 0; /* * Manipulate valstack so that args are on the current bottom and the * previous caller's 'this' binding (which is the value preceding the * current bottom) is replaced with the new 'this' binding: * * [ ... this_old | (crud) func this_new arg1 ... argN ] * --> [ ... this_new | arg1 ... argN ] * * For tail calling to work properly, the valstack bottom must not grow * here; otherwise crud would accumulate on the valstack. */ tv1 = thr->valstack_bottom - 1; tv2 = thr->valstack_bottom + idx_func + 1; DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top); /* tv1 is -below- valstack_bottom */ DUK_ASSERT(tv2 >= thr->valstack_bottom && tv2 < thr->valstack_top); DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */ idx_args = idx_func + 2; duk_remove_n(thr, 0, idx_args); /* may be NORZ */ idx_func = 0; DUK_UNREF(idx_func); /* really 'not applicable' anymore, should not be referenced after this */ idx_args = 0; *out_nargs = ((duk_hcompfunc *) func)->nargs; *out_nregs = ((duk_hcompfunc *) func)->nregs; DUK_ASSERT(*out_nregs >= 0); DUK_ASSERT(*out_nregs >= *out_nargs); *out_vs_min_bytes = entry_valstack_bottom_byteoff + sizeof(duk_tval) * ((duk_size_t) *out_nregs + DUK_VALSTACK_INTERNAL_EXTRA); #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) #if defined(DUK_USE_TAILCALL) #error incorrect options: tail calls enabled with function caller property #endif /* XXX: This doesn't actually work properly for tail calls, so * tail calls are disabled when DUK_USE_NONSTD_FUNC_CALLER_PROPERTY * is in use. */ duk__update_func_caller_prop(thr, func); #endif /* [ ... this_new | arg1 ... argN ] */ return 1; } #endif /* DUK_USE_TAILCALL */ DUK_LOCAL void duk__call_setup_act_not_tailcall(duk_hthread *thr, duk_small_uint_t call_flags, duk_idx_t idx_func, duk_hobject *func, duk_size_t entry_valstack_bottom_byteoff, duk_size_t entry_valstack_end_byteoff, duk_idx_t *out_nargs, duk_idx_t *out_nregs, duk_size_t *out_vs_min_bytes, duk_activation **out_act) { duk_activation *act; duk_activation *new_act; DUK_UNREF(entry_valstack_end_byteoff); DUK_DDD(DUK_DDDPRINT("not a tail call, pushing a new activation to callstack, to index %ld", (long) (thr->callstack_top))); duk__call_callstack_limit_check(thr); new_act = duk_hthread_activation_alloc(thr); DUK_ASSERT(new_act != NULL); act = thr->callstack_curr; if (act != NULL) { /* * Update return value stack index of current activation (if any). * * Although it might seem this is not necessary (bytecode executor * does this for ECMAScript-to-ECMAScript calls; other calls are * handled here), this turns out to be necessary for handling yield * and resume. For them, an ECMAScript-to-native call happens, and * the ECMAScript call's retval_byteoff must be set for things to work. */ act->retval_byteoff = entry_valstack_bottom_byteoff + (duk_size_t) idx_func * sizeof(duk_tval); } new_act->parent = act; thr->callstack_curr = new_act; thr->callstack_top++; act = new_act; *out_act = act; DUK_ASSERT(thr->valstack_top > thr->valstack_bottom); /* at least effective 'this' */ DUK_ASSERT(func == NULL || !DUK_HOBJECT_HAS_BOUNDFUNC(func)); act->cat = NULL; act->flags = 0; if (call_flags & DUK_CALL_FLAG_CONSTRUCT) { act->flags |= DUK_ACT_FLAG_CONSTRUCT; } #if defined(DUK_USE_ES6_PROXY) if (call_flags & DUK_CALL_FLAG_CONSTRUCT_PROXY) { act->flags |= DUK_ACT_FLAG_CONSTRUCT_PROXY; } #endif if (call_flags & DUK_CALL_FLAG_DIRECT_EVAL) { act->flags |= DUK_ACT_FLAG_DIRECT_EVAL; } /* start of arguments: idx_func + 2. */ act->func = func; /* NULL for lightfunc */ if (DUK_LIKELY(func != NULL)) { DUK_TVAL_SET_OBJECT(&act->tv_func, func); /* borrowed, no refcount */ if (DUK_HOBJECT_HAS_STRICT(func)) { act->flags |= DUK_ACT_FLAG_STRICT; } if (DUK_HOBJECT_IS_COMPFUNC(func)) { *out_nargs = ((duk_hcompfunc *) func)->nargs; *out_nregs = ((duk_hcompfunc *) func)->nregs; DUK_ASSERT(*out_nregs >= 0); DUK_ASSERT(*out_nregs >= *out_nargs); *out_vs_min_bytes = entry_valstack_bottom_byteoff + sizeof(duk_tval) * ((duk_size_t) idx_func + 2U + (duk_size_t) *out_nregs + DUK_VALSTACK_INTERNAL_EXTRA); } else { /* True because of call target lookup checks. */ DUK_ASSERT(DUK_HOBJECT_IS_NATFUNC(func)); *out_nargs = ((duk_hnatfunc *) func)->nargs; *out_nregs = *out_nargs; if (*out_nargs >= 0) { *out_vs_min_bytes = entry_valstack_bottom_byteoff + sizeof(duk_tval) * ((duk_size_t) idx_func + 2U + (duk_size_t) *out_nregs + DUK_VALSTACK_API_ENTRY_MINIMUM + DUK_VALSTACK_INTERNAL_EXTRA); } else { /* Vararg function. */ duk_size_t valstack_top_byteoff = (duk_size_t) ((duk_uint8_t *) thr->valstack_top - ((duk_uint8_t *) thr->valstack)); *out_vs_min_bytes = valstack_top_byteoff + sizeof(duk_tval) * (DUK_VALSTACK_API_ENTRY_MINIMUM + DUK_VALSTACK_INTERNAL_EXTRA); } } } else { duk_small_uint_t lf_flags; duk_tval *tv_func; act->flags |= DUK_ACT_FLAG_STRICT; tv_func = DUK_GET_TVAL_POSIDX(thr, idx_func); DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv_func)); DUK_TVAL_SET_TVAL(&act->tv_func, tv_func); /* borrowed, no refcount */ lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv_func); *out_nargs = DUK_LFUNC_FLAGS_GET_NARGS(lf_flags); if (*out_nargs != DUK_LFUNC_NARGS_VARARGS) { *out_vs_min_bytes = entry_valstack_bottom_byteoff + sizeof(duk_tval) * ((duk_size_t) idx_func + 2U + (duk_size_t) *out_nargs + DUK_VALSTACK_API_ENTRY_MINIMUM + DUK_VALSTACK_INTERNAL_EXTRA); } else { duk_size_t valstack_top_byteoff = (duk_size_t) ((duk_uint8_t *) thr->valstack_top - ((duk_uint8_t *) thr->valstack)); *out_vs_min_bytes = valstack_top_byteoff + sizeof(duk_tval) * (DUK_VALSTACK_API_ENTRY_MINIMUM + DUK_VALSTACK_INTERNAL_EXTRA); *out_nargs = -1; /* vararg */ } *out_nregs = *out_nargs; } act->var_env = NULL; act->lex_env = NULL; #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) act->prev_caller = NULL; #endif act->curr_pc = NULL; #if defined(DUK_USE_DEBUGGER_SUPPORT) act->prev_line = 0; #endif act->bottom_byteoff = entry_valstack_bottom_byteoff + sizeof(duk_tval) * ((duk_size_t) idx_func + 2U); #if 0 act->retval_byteoff = 0; /* topmost activation retval_byteoff is considered garbage, no need to init */ #endif /* Filled in when final reserve is known, dummy value doesn't matter * even in error unwind because reserve_byteoff is only used when * returning to -this- activation. */ act->reserve_byteoff = 0; /* filled in by caller */ /* XXX: Is this INCREF necessary? 'func' is always a borrowed * reference reachable through the value stack? If changed, stack * unwind code also needs to be fixed to match. */ DUK_HOBJECT_INCREF_ALLOWNULL(thr, func); /* act->func */ #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) if (func) { duk__update_func_caller_prop(thr, func); } #endif } /* * Environment setup. */ DUK_LOCAL void duk__call_env_setup(duk_hthread *thr, duk_hobject *func, duk_activation *act, duk_idx_t idx_args) { duk_hobject *env; DUK_ASSERT(func == NULL || !DUK_HOBJECT_HAS_BOUNDFUNC(func)); /* bound function has already been resolved */ if (DUK_LIKELY(func != NULL)) { if (DUK_LIKELY(DUK_HOBJECT_HAS_NEWENV(func))) { DUK_STATS_INC(thr->heap, stats_envrec_newenv); if (DUK_LIKELY(!DUK_HOBJECT_HAS_CREATEARGS(func))) { /* Use a new environment but there's no 'arguments' object; * delayed environment initialization. This is the most * common case. */ DUK_ASSERT(act->lex_env == NULL); DUK_ASSERT(act->var_env == NULL); } else { /* Use a new environment and there's an 'arguments' object. * We need to initialize it right now. */ /* third arg: absolute index (to entire valstack) of bottom_byteoff of new activation */ env = duk_create_activation_environment_record(thr, func, act->bottom_byteoff); DUK_ASSERT(env != NULL); /* [ ... func this arg1 ... argN envobj ] */ DUK_ASSERT(DUK_HOBJECT_HAS_CREATEARGS(func)); duk__handle_createargs_for_call(thr, func, env, idx_args); /* [ ... func this arg1 ... argN envobj ] */ act->lex_env = env; act->var_env = env; DUK_HOBJECT_INCREF(thr, env); DUK_HOBJECT_INCREF(thr, env); /* XXX: incref by count (2) directly */ duk_pop(thr); } } else { /* Use existing env (e.g. for non-strict eval); cannot have * an own 'arguments' object (but can refer to an existing one). */ DUK_ASSERT(!DUK_HOBJECT_HAS_CREATEARGS(func)); DUK_STATS_INC(thr->heap, stats_envrec_oldenv); duk__handle_oldenv_for_call(thr, func, act); DUK_ASSERT(act->lex_env != NULL); DUK_ASSERT(act->var_env != NULL); } } else { /* Lightfuncs are always native functions and have "newenv". */ DUK_ASSERT(act->lex_env == NULL); DUK_ASSERT(act->var_env == NULL); DUK_STATS_INC(thr->heap, stats_envrec_newenv); } } /* * Misc shared helpers. */ /* Check thread state, update current thread. */ DUK_LOCAL void duk__call_thread_state_update(duk_hthread *thr) { DUK_ASSERT(thr != NULL); if (DUK_LIKELY(thr == thr->heap->curr_thread)) { if (DUK_UNLIKELY(thr->state != DUK_HTHREAD_STATE_RUNNING)) { /* Should actually never happen, but check anyway. */ goto thread_state_error; } } else { DUK_ASSERT(thr->heap->curr_thread == NULL || thr->heap->curr_thread->state == DUK_HTHREAD_STATE_RUNNING); if (DUK_UNLIKELY(thr->state != DUK_HTHREAD_STATE_INACTIVE)) { goto thread_state_error; } DUK_HEAP_SWITCH_THREAD(thr->heap, thr); thr->state = DUK_HTHREAD_STATE_RUNNING; /* Multiple threads may be simultaneously in the RUNNING * state, but not in the same "resume chain". */ } DUK_ASSERT(thr->heap->curr_thread == thr); DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING); return; thread_state_error: DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "invalid thread state (%ld)", (long) thr->state); DUK_WO_NORETURN(return;); } /* * Main unprotected call handler, handles: * * - All combinations of native/ECMAScript caller and native/ECMAScript * target. * * - Optimized ECMAScript-to-ECMAScript call where call handling only * sets up a new duk_activation but reuses an existing bytecode executor * (the caller) without native recursion. * * - Tailcalls, where an activation is reused without increasing call * stack (duk_activation) depth. * * - Setup for an initial Duktape.Thread.resume(). * * The call handler doesn't provide any protection guarantees, protected calls * must be implemented e.g. by wrapping the call in a duk_safe_call(). * Call setup may fail at any stage, even when the new activation is in * place; the only guarantee is that the state is consistent for unwinding. */ DUK_LOCAL duk_int_t duk__handle_call_raw(duk_hthread *thr, duk_idx_t idx_func, duk_small_uint_t call_flags) { #if defined(DUK_USE_ASSERTIONS) duk_activation *entry_act; duk_size_t entry_callstack_top; #endif duk_size_t entry_valstack_bottom_byteoff; duk_size_t entry_valstack_end_byteoff; duk_int_t entry_call_recursion_depth; duk_hthread *entry_curr_thread; duk_uint_fast8_t entry_thread_state; duk_instr_t **entry_ptr_curr_pc; duk_idx_t idx_args; duk_idx_t nargs; /* # argument registers target function wants (< 0 => "as is") */ duk_idx_t nregs; /* # total registers target function wants on entry (< 0 => "as is") */ duk_size_t vs_min_bytes; /* minimum value stack size (bytes) for handling call */ duk_hobject *func; /* 'func' on stack (borrowed reference) */ duk_activation *act; duk_ret_t rc; duk_small_uint_t use_tailcall; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); /* Asserts for heap->curr_thread omitted: it may be NULL, 'thr', or * any other thread (e.g. when heap thread is used to run finalizers). */ DUK_CTX_ASSERT_VALID(thr); DUK_ASSERT(duk_is_valid_index(thr, idx_func)); DUK_ASSERT(idx_func >= 0); DUK_STATS_INC(thr->heap, stats_call_all); /* If a tail call: * - an ECMAScript activation must be on top of the callstack * - there cannot be any catch stack entries that would catch * a return */ #if defined(DUK_USE_ASSERTIONS) if (call_flags & DUK_CALL_FLAG_TAILCALL) { duk_activation *tmp_act; duk_catcher *tmp_cat; DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr) != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr))); /* No entry in the catch stack which would actually catch a * throw can refer to the callstack entry being reused. * There *can* be catch stack entries referring to the current * callstack entry as long as they don't catch (e.g. label sites). */ tmp_act = thr->callstack_curr; for (tmp_cat = tmp_act->cat; tmp_cat != NULL; tmp_cat = tmp_cat->parent) { DUK_ASSERT(DUK_CAT_GET_TYPE(tmp_cat) == DUK_CAT_TYPE_LABEL); /* a non-catching entry */ } } #endif /* DUK_USE_ASSERTIONS */ /* * Store entry state. */ #if defined(DUK_USE_ASSERTIONS) entry_act = thr->callstack_curr; entry_callstack_top = thr->callstack_top; #endif entry_valstack_bottom_byteoff = (duk_size_t) ((duk_uint8_t *) thr->valstack_bottom - (duk_uint8_t *) thr->valstack); entry_valstack_end_byteoff = (duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack); entry_call_recursion_depth = thr->heap->call_recursion_depth; entry_curr_thread = thr->heap->curr_thread; /* may be NULL if first call */ entry_thread_state = thr->state; entry_ptr_curr_pc = thr->ptr_curr_pc; /* may be NULL */ /* If thr->ptr_curr_pc is set, sync curr_pc to act->pc. Then NULL * thr->ptr_curr_pc so that it's not accidentally used with an incorrect * activation when side effects occur. */ duk_hthread_sync_and_null_currpc(thr); DUK_ASSERT(thr->ptr_curr_pc == NULL); DUK_DD(DUK_DDPRINT("duk__handle_call_raw: thr=%p, idx_func=%ld, " "call_flags=0x%08lx (constructor=%ld), " "valstack_top=%ld, idx_func=%ld, idx_args=%ld, rec_depth=%ld/%ld, " "entry_valstack_bottom_byteoff=%ld, entry_valstack_end_byteoff=%ld, " "entry_call_recursion_depth=%ld, " "entry_curr_thread=%p, entry_thread_state=%ld", (void *) thr, (long) idx_func, (unsigned long) call_flags, (long) ((call_flags & DUK_CALL_FLAG_CONSTRUCT) != 0 ? 1 : 0), (long) duk_get_top(thr), (long) idx_func, (long) (idx_func + 2), (long) thr->heap->call_recursion_depth, (long) thr->heap->call_recursion_limit, (long) entry_valstack_bottom_byteoff, (long) entry_valstack_end_byteoff, (long) entry_call_recursion_depth, (void *) entry_curr_thread, (long) entry_thread_state)); /* * Thread state check and book-keeping. */ duk__call_thread_state_update(thr); /* * Increase call recursion depth as early as possible so that if we * enter a recursive call for any reason there's a backstop to native * recursion. This can happen e.g. for almost any property read * because it may cause a getter call or a Proxy trap (GC and finalizers * are not an issue because they are not recursive). If we end up * doing an Ecma-to-Ecma call, revert the increase. (See GH-2032.) * * For similar reasons, ensure there is a known value stack spare * even before we actually prepare the value stack for the target * function. If this isn't done, early recursion may consume the * value stack space. * * XXX: Should bump yield preventcount early, for the same reason. */ duk__call_c_recursion_limit_check(thr); thr->heap->call_recursion_depth++; duk_require_stack(thr, DUK__CALL_HANDLING_REQUIRE_STACK); /* * Resolve final target function; handle bound functions and special * functions like .call() and .apply(). Also figure out the effective * 'this' binding, which replaces the current value at idx_func + 1. */ if (DUK_LIKELY(duk__resolve_target_fastpath_check(thr, idx_func, &func, call_flags) != 0U)) { DUK_DDD(DUK_DDDPRINT("fast path target resolve")); } else { DUK_DDD(DUK_DDDPRINT("slow path target resolve")); func = duk__resolve_target_func_and_this_binding(thr, idx_func, &call_flags); } DUK_ASSERT(duk_get_top(thr) - idx_func >= 2); /* at least func and this present */ DUK_ASSERT(func == NULL || !DUK_HOBJECT_HAS_BOUNDFUNC(func)); DUK_ASSERT(func == NULL || (DUK_HOBJECT_IS_COMPFUNC(func) || DUK_HOBJECT_IS_NATFUNC(func))); /* [ ... func this arg1 ... argN ] */ /* * Setup a preliminary activation and figure out nargs/nregs and * value stack minimum size. * * Don't touch valstack_bottom or valstack_top yet so that Duktape API * calls work normally. * * Because 'act' is not zeroed, all fields must be filled in. */ /* Should not be necessary, but initialize to silence warnings. */ act = NULL; nargs = 0; nregs = 0; vs_min_bytes = 0; #if defined(DUK_USE_TAILCALL) use_tailcall = (call_flags & DUK_CALL_FLAG_TAILCALL); if (use_tailcall) { use_tailcall = duk__call_setup_act_attempt_tailcall(thr, call_flags, idx_func, func, entry_valstack_bottom_byteoff, entry_valstack_end_byteoff, &nargs, &nregs, &vs_min_bytes, &act); } #else DUK_ASSERT((call_flags & DUK_CALL_FLAG_TAILCALL) == 0); /* compiler ensures this */ use_tailcall = 0; #endif if (use_tailcall) { idx_args = 0; DUK_STATS_INC(thr->heap, stats_call_tailcall); } else { duk__call_setup_act_not_tailcall(thr, call_flags, idx_func, func, entry_valstack_bottom_byteoff, entry_valstack_end_byteoff, &nargs, &nregs, &vs_min_bytes, &act); idx_args = idx_func + 2; } /* After this point idx_func is no longer valid for tailcalls. */ DUK_ASSERT(act != NULL); /* [ ... func this arg1 ... argN ] */ /* * Environment record creation and 'arguments' object creation. * Named function expression name binding is handled by the * compiler; the compiled function's parent env will contain * the (immutable) binding already. * * This handling is now identical for C and ECMAScript functions. * C functions always have the 'NEWENV' flag set, so their * environment record initialization is delayed (which is good). * * Delayed creation (on demand) is handled in duk_js_var.c. */ duk__call_env_setup(thr, func, act, idx_args); /* [ ... func this arg1 ... argN ] */ /* * Setup value stack: clamp to 'nargs', fill up to 'nregs', * ensure value stack size matches target requirements, and * switch value stack bottom. Valstack top is kept. * * Value stack can only grow here. */ duk_valstack_grow_check_throw(thr, vs_min_bytes); act->reserve_byteoff = (duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack); if (use_tailcall) { DUK_ASSERT(nregs >= 0); DUK_ASSERT(nregs >= nargs); duk_set_top_and_wipe(thr, nregs, nargs); } else { if (nregs >= 0) { DUK_ASSERT(nregs >= nargs); duk_set_top_and_wipe(thr, idx_func + 2 + nregs, idx_func + 2 + nargs); } else { ; } thr->valstack_bottom = thr->valstack_bottom + idx_func + 2; } DUK_ASSERT(thr->valstack_bottom >= thr->valstack); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT(thr->valstack_end >= thr->valstack_top); /* * Make the actual call. For Ecma-to-Ecma calls detect that * setup is complete, then return with a status code that allows * the caller to reuse the running executor. */ if (func != NULL && DUK_HOBJECT_IS_COMPFUNC(func)) { /* * ECMAScript call. */ DUK_ASSERT(func != NULL); DUK_ASSERT(DUK_HOBJECT_HAS_COMPFUNC(func)); act->curr_pc = DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, (duk_hcompfunc *) func); if (call_flags & DUK_CALL_FLAG_ALLOW_ECMATOECMA) { DUK_DD(DUK_DDPRINT("avoid native call, use existing executor")); DUK_STATS_INC(thr->heap, stats_call_ecmatoecma); DUK_ASSERT((act->flags & DUK_ACT_FLAG_PREVENT_YIELD) == 0); DUK_REFZERO_CHECK_FAST(thr); DUK_ASSERT(thr->ptr_curr_pc == NULL); thr->heap->call_recursion_depth--; /* No recursion increase for this case. */ return 1; /* 1=reuse executor */ } DUK_ASSERT(use_tailcall == 0); /* duk_hthread_activation_unwind_norz() will decrease this on unwind */ DUK_ASSERT((act->flags & DUK_ACT_FLAG_PREVENT_YIELD) == 0); act->flags |= DUK_ACT_FLAG_PREVENT_YIELD; thr->callstack_preventcount++; /* [ ... func this | arg1 ... argN ] ('this' must precede new bottom) */ /* * Bytecode executor call. * * Execute bytecode, handling any recursive function calls and * thread resumptions. Returns when execution would return from * the entry level activation. When the executor returns, a * single return value is left on the stack top. * * The only possible longjmp() is an error (DUK_LJ_TYPE_THROW), * other types are handled internally by the executor. */ /* thr->ptr_curr_pc is set by bytecode executor early on entry */ DUK_ASSERT(thr->ptr_curr_pc == NULL); DUK_DDD(DUK_DDDPRINT("entering bytecode execution")); duk_js_execute_bytecode(thr); DUK_DDD(DUK_DDDPRINT("returned from bytecode execution")); } else { /* * Native call. */ DUK_ASSERT(func == NULL || ((duk_hnatfunc *) func)->func != NULL); DUK_ASSERT(use_tailcall == 0); /* [ ... func this | arg1 ... argN ] ('this' must precede new bottom) */ /* duk_hthread_activation_unwind_norz() will decrease this on unwind */ DUK_ASSERT((act->flags & DUK_ACT_FLAG_PREVENT_YIELD) == 0); act->flags |= DUK_ACT_FLAG_PREVENT_YIELD; thr->callstack_preventcount++; /* For native calls must be NULL so we don't sync back */ DUK_ASSERT(thr->ptr_curr_pc == NULL); /* XXX: native funcptr could come out of call setup. */ if (func) { rc = ((duk_hnatfunc *) func)->func(thr); } else { duk_tval *tv_func; duk_c_function funcptr; tv_func = &act->tv_func; DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv_func)); funcptr = DUK_TVAL_GET_LIGHTFUNC_FUNCPTR(tv_func); rc = funcptr(thr); } /* Automatic error throwing, retval check. */ if (rc == 0) { DUK_ASSERT(thr->valstack < thr->valstack_end); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top)); thr->valstack_top++; } else if (rc == 1) { ; } else if (rc < 0) { duk_error_throw_from_negative_rc(thr, rc); DUK_WO_NORETURN(return 0;); } else { DUK_ERROR_TYPE(thr, DUK_STR_INVALID_CFUNC_RC); DUK_WO_NORETURN(return 0;); } } DUK_ASSERT(thr->ptr_curr_pc == NULL); DUK_ASSERT(use_tailcall == 0); /* * Constructor call post processing. */ #if defined(DUK_USE_ES6_PROXY) if (call_flags & (DUK_CALL_FLAG_CONSTRUCT | DUK_CALL_FLAG_CONSTRUCT_PROXY)) { duk_call_construct_postprocess(thr, call_flags & DUK_CALL_FLAG_CONSTRUCT_PROXY); } #else if (call_flags & DUK_CALL_FLAG_CONSTRUCT) { duk_call_construct_postprocess(thr, 0); } #endif /* * Unwind, restore valstack bottom and other book-keeping. */ DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(thr->callstack_curr->parent == entry_act); DUK_ASSERT(thr->callstack_top == entry_callstack_top + 1); duk_hthread_activation_unwind_norz(thr); DUK_ASSERT(thr->callstack_curr == entry_act); DUK_ASSERT(thr->callstack_top == entry_callstack_top); thr->valstack_bottom = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + entry_valstack_bottom_byteoff); /* keep current valstack_top */ DUK_ASSERT(thr->valstack_bottom >= thr->valstack); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT(thr->valstack_end >= thr->valstack_top); DUK_ASSERT(thr->valstack_top - thr->valstack_bottom >= idx_func + 1); /* Return value handling. */ /* [ ... func this (crud) retval ] */ { duk_tval *tv_ret; duk_tval *tv_funret; tv_ret = thr->valstack_bottom + idx_func; tv_funret = thr->valstack_top - 1; #if defined(DUK_USE_FASTINT) /* Explicit check for fastint downgrade. */ DUK_TVAL_CHKFAST_INPLACE_FAST(tv_funret); #endif DUK_TVAL_SET_TVAL_UPDREF(thr, tv_ret, tv_funret); /* side effects */ } duk_set_top_unsafe(thr, idx_func + 1); /* [ ... retval ] */ /* Restore caller's value stack reserve (cannot fail). */ DUK_ASSERT((duk_uint8_t *) thr->valstack + entry_valstack_end_byteoff >= (duk_uint8_t *) thr->valstack_top); DUK_ASSERT((duk_uint8_t *) thr->valstack + entry_valstack_end_byteoff <= (duk_uint8_t *) thr->valstack_alloc_end); thr->valstack_end = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + entry_valstack_end_byteoff); /* XXX: Trial value stack shrink would be OK here, but we'd need * to prevent side effects of the potential realloc. */ /* Restore entry thread executor curr_pc stack frame pointer. */ thr->ptr_curr_pc = entry_ptr_curr_pc; DUK_HEAP_SWITCH_THREAD(thr->heap, entry_curr_thread); /* may be NULL */ thr->state = (duk_uint8_t) entry_thread_state; /* Disabled assert: triggered with some torture tests. */ #if 0 DUK_ASSERT((thr->state == DUK_HTHREAD_STATE_INACTIVE && thr->heap->curr_thread == NULL) || /* first call */ (thr->state == DUK_HTHREAD_STATE_INACTIVE && thr->heap->curr_thread != NULL) || /* other call */ (thr->state == DUK_HTHREAD_STATE_RUNNING && thr->heap->curr_thread == thr)); /* current thread */ #endif thr->heap->call_recursion_depth = entry_call_recursion_depth; /* If the debugger is active we need to force an interrupt so that * debugger breakpoints are rechecked. This is important for function * calls caused by side effects (e.g. when doing a DUK_OP_GETPROP), see * GH-303. Only needed for success path, error path always causes a * breakpoint recheck in the executor. It would be enough to set this * only when returning to an ECMAScript activation, but setting the flag * on every return should have no ill effect. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) if (duk_debug_is_attached(thr->heap)) { DUK_DD(DUK_DDPRINT("returning with debugger enabled, force interrupt")); DUK_ASSERT(thr->interrupt_counter <= thr->interrupt_init); thr->interrupt_init -= thr->interrupt_counter; thr->interrupt_counter = 0; thr->heap->dbg_force_restart = 1; } #endif #if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG) duk__interrupt_fixup(thr, entry_curr_thread); #endif /* Restored by success path. */ DUK_ASSERT(thr->heap->call_recursion_depth == entry_call_recursion_depth); DUK_ASSERT(thr->ptr_curr_pc == entry_ptr_curr_pc); DUK_ASSERT_LJSTATE_UNSET(thr->heap); DUK_REFZERO_CHECK_FAST(thr); return 0; /* 0=call handled inline */ } DUK_INTERNAL duk_int_t duk_handle_call_unprotected_nargs(duk_hthread *thr, duk_idx_t nargs, duk_small_uint_t call_flags) { duk_idx_t idx_func; DUK_ASSERT(duk_get_top(thr) >= nargs + 2); idx_func = duk_get_top(thr) - (nargs + 2); DUK_ASSERT(idx_func >= 0); return duk_handle_call_unprotected(thr, idx_func, call_flags); } DUK_INTERNAL duk_int_t duk_handle_call_unprotected(duk_hthread *thr, duk_idx_t idx_func, duk_small_uint_t call_flags) { DUK_ASSERT(duk_is_valid_index(thr, idx_func)); DUK_ASSERT(idx_func >= 0); return duk__handle_call_raw(thr, idx_func, call_flags); } /* * duk_handle_safe_call(): make a "C protected call" within the * current activation. * * The allowed thread states for making a call are the same as for * duk_handle_call_protected(). * * Even though this call is protected, errors are thrown for insane arguments * and may result in a fatal error unless there's another protected call which * catches such errors. * * The error handling path should be error free, even for out-of-memory * errors, to ensure safe sandboxing. (As of Duktape 2.2.0 this is not * yet the case for environment closing which may run out of memory, see * XXX notes below.) */ DUK_LOCAL void duk__handle_safe_call_inner(duk_hthread *thr, duk_safe_call_function func, void *udata, #if defined(DUK_USE_ASSERTIONS) duk_size_t entry_valstack_bottom_byteoff, duk_size_t entry_callstack_top, #endif duk_hthread *entry_curr_thread, duk_uint_fast8_t entry_thread_state, duk_idx_t idx_retbase, duk_idx_t num_stack_rets) { duk_ret_t rc; DUK_ASSERT(thr != NULL); DUK_CTX_ASSERT_VALID(thr); /* * Thread state check and book-keeping. */ duk__call_thread_state_update(thr); /* * Recursion limit check. */ duk__call_c_recursion_limit_check(thr); thr->heap->call_recursion_depth++; /* * Make the C call. */ rc = func(thr, udata); DUK_DDD(DUK_DDDPRINT("safe_call, func rc=%ld", (long) rc)); /* * Valstack manipulation for results. */ /* we're running inside the caller's activation, so no change in call/catch stack or valstack bottom */ DUK_ASSERT(thr->callstack_top == entry_callstack_top); DUK_ASSERT(thr->valstack_bottom >= thr->valstack); DUK_ASSERT((duk_size_t) ((duk_uint8_t *) thr->valstack_bottom - (duk_uint8_t *) thr->valstack) == entry_valstack_bottom_byteoff); DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom); DUK_ASSERT(thr->valstack_end >= thr->valstack_top); if (DUK_UNLIKELY(rc < 0)) { duk_error_throw_from_negative_rc(thr, rc); DUK_WO_NORETURN(return;); } DUK_ASSERT(rc >= 0); duk__safe_call_adjust_valstack(thr, idx_retbase, num_stack_rets, rc); /* throws for insane rc */ DUK_HEAP_SWITCH_THREAD(thr->heap, entry_curr_thread); /* may be NULL */ thr->state = (duk_uint8_t) entry_thread_state; } DUK_LOCAL void duk__handle_safe_call_error(duk_hthread *thr, duk_activation *entry_act, #if defined(DUK_USE_ASSERTIONS) duk_size_t entry_callstack_top, #endif duk_hthread *entry_curr_thread, duk_uint_fast8_t entry_thread_state, duk_idx_t idx_retbase, duk_idx_t num_stack_rets, duk_size_t entry_valstack_bottom_byteoff, duk_jmpbuf *old_jmpbuf_ptr) { DUK_ASSERT(thr != NULL); DUK_CTX_ASSERT_VALID(thr); /* * Error during call. The error value is at heap->lj.value1. * * The very first thing we do is restore the previous setjmp catcher. * This means that any error in error handling will propagate outwards * instead of causing a setjmp() re-entry above. */ DUK_DDD(DUK_DDDPRINT("error caught during protected duk_handle_safe_call()")); /* Other longjmp types are handled by executor before propagating * the error here. */ DUK_ASSERT(thr->heap->lj.type == DUK_LJ_TYPE_THROW); DUK_ASSERT_LJSTATE_SET(thr->heap); /* Either pointer may be NULL (at entry), so don't assert. */ thr->heap->lj.jmpbuf_ptr = old_jmpbuf_ptr; /* XXX: callstack unwind may now throw an error when closing * scopes; this is a sandboxing issue, described in: * https://github.com/svaarala/duktape/issues/476 */ /* XXX: "unwind to" primitive? */ DUK_ASSERT(thr->callstack_top >= entry_callstack_top); while (thr->callstack_curr != entry_act) { DUK_ASSERT(thr->callstack_curr != NULL); duk_hthread_activation_unwind_norz(thr); } DUK_ASSERT(thr->callstack_top == entry_callstack_top); /* Switch active thread before any side effects to avoid a * dangling curr_thread pointer. */ DUK_HEAP_SWITCH_THREAD(thr->heap, entry_curr_thread); /* may be NULL */ thr->state = (duk_uint8_t) entry_thread_state; DUK_ASSERT(thr->heap->curr_thread == entry_curr_thread); DUK_ASSERT(thr->state == entry_thread_state); /* Restore valstack bottom. */ thr->valstack_bottom = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + entry_valstack_bottom_byteoff); /* [ ... | (crud) ] */ /* XXX: ensure space in valstack (now relies on internal reserve)? */ duk_push_tval(thr, &thr->heap->lj.value1); /* [ ... | (crud) errobj ] */ DUK_ASSERT(duk_get_top(thr) >= 1); /* at least errobj must be on stack */ duk__safe_call_adjust_valstack(thr, idx_retbase, num_stack_rets, 1); /* 1 = num actual 'return values' */ /* [ ... | ] or [ ... | errobj (M * undefined)] where M = num_stack_rets - 1 */ /* Reset longjmp state. */ thr->heap->lj.type = DUK_LJ_TYPE_UNKNOWN; thr->heap->lj.iserror = 0; DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ(thr, &thr->heap->lj.value1); DUK_TVAL_SET_UNDEFINED_UPDREF_NORZ(thr, &thr->heap->lj.value2); /* Error handling complete, remove side effect protections. Caller * will process pending finalizers. */ #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(thr->heap->error_not_allowed == 1); thr->heap->error_not_allowed = 0; #endif DUK_ASSERT(thr->heap->pf_prevent_count > 0); thr->heap->pf_prevent_count--; DUK_DD(DUK_DDPRINT("safe call error handled, pf_prevent_count updated to %ld", (long) thr->heap->pf_prevent_count)); /* thr->ptr_curr_pc is restored by * duk__handle_safe_call_shared_unwind() which is also used for * success path. */ } DUK_LOCAL void duk__handle_safe_call_shared_unwind(duk_hthread *thr, duk_idx_t idx_retbase, duk_idx_t num_stack_rets, #if defined(DUK_USE_ASSERTIONS) duk_size_t entry_callstack_top, #endif duk_int_t entry_call_recursion_depth, duk_hthread *entry_curr_thread, duk_instr_t **entry_ptr_curr_pc) { DUK_ASSERT(thr != NULL); DUK_CTX_ASSERT_VALID(thr); DUK_UNREF(idx_retbase); DUK_UNREF(num_stack_rets); DUK_UNREF(entry_curr_thread); DUK_ASSERT(thr->callstack_top == entry_callstack_top); /* Restore entry thread executor curr_pc stack frame pointer. * XXX: would be enough to do in error path only, should nest * cleanly in success path. */ thr->ptr_curr_pc = entry_ptr_curr_pc; thr->heap->call_recursion_depth = entry_call_recursion_depth; /* stack discipline consistency check */ DUK_ASSERT(duk_get_top(thr) == idx_retbase + num_stack_rets); /* A debugger forced interrupt check is not needed here, as * problematic safe calls are not caused by side effects. */ #if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG) duk__interrupt_fixup(thr, entry_curr_thread); #endif } DUK_INTERNAL duk_int_t duk_handle_safe_call(duk_hthread *thr, duk_safe_call_function func, void *udata, duk_idx_t num_stack_args, duk_idx_t num_stack_rets) { duk_activation *entry_act; duk_size_t entry_valstack_bottom_byteoff; #if defined(DUK_USE_ASSERTIONS) duk_size_t entry_valstack_end_byteoff; duk_size_t entry_callstack_top; duk_size_t entry_callstack_preventcount; #endif duk_int_t entry_call_recursion_depth; duk_hthread *entry_curr_thread; duk_uint_fast8_t entry_thread_state; duk_instr_t **entry_ptr_curr_pc; duk_jmpbuf *old_jmpbuf_ptr = NULL; duk_jmpbuf our_jmpbuf; duk_idx_t idx_retbase; duk_int_t retval; DUK_ASSERT(thr != NULL); DUK_ASSERT(duk_get_top(thr) >= num_stack_args); /* Caller ensures. */ DUK_STATS_INC(thr->heap, stats_safecall_all); /* Value stack reserve handling: safe call assumes caller has reserved * space for nrets (assuming optimal unwind processing). Value stack * reserve is not stored/restored as for normal calls because a safe * call conceptually happens in the same activation. */ /* Careful with indices like '-x'; if 'x' is zero, it refers to bottom */ entry_act = thr->callstack_curr; entry_valstack_bottom_byteoff = (duk_size_t) ((duk_uint8_t *) thr->valstack_bottom - (duk_uint8_t *) thr->valstack); #if defined(DUK_USE_ASSERTIONS) entry_valstack_end_byteoff = (duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack); entry_callstack_top = thr->callstack_top; entry_callstack_preventcount = thr->callstack_preventcount; #endif entry_call_recursion_depth = thr->heap->call_recursion_depth; entry_curr_thread = thr->heap->curr_thread; /* may be NULL if first call */ entry_thread_state = thr->state; entry_ptr_curr_pc = thr->ptr_curr_pc; /* may be NULL */ idx_retbase = duk_get_top(thr) - num_stack_args; /* not a valid stack index if num_stack_args == 0 */ DUK_ASSERT(idx_retbase >= 0); DUK_ASSERT((duk_idx_t) (thr->valstack_top - thr->valstack_bottom) >= num_stack_args); /* Caller ensures. */ DUK_ASSERT((duk_idx_t) (thr->valstack_end - (thr->valstack_bottom + idx_retbase)) >= num_stack_rets); /* Caller ensures. */ /* Cannot portably debug print a function pointer, hence 'func' not printed! */ DUK_DD(DUK_DDPRINT("duk_handle_safe_call: thr=%p, num_stack_args=%ld, num_stack_rets=%ld, " "valstack_top=%ld, idx_retbase=%ld, rec_depth=%ld/%ld, " "entry_act=%p, entry_valstack_bottom_byteoff=%ld, entry_call_recursion_depth=%ld, " "entry_curr_thread=%p, entry_thread_state=%ld", (void *) thr, (long) num_stack_args, (long) num_stack_rets, (long) duk_get_top(thr), (long) idx_retbase, (long) thr->heap->call_recursion_depth, (long) thr->heap->call_recursion_limit, (void *) entry_act, (long) entry_valstack_bottom_byteoff, (long) entry_call_recursion_depth, (void *) entry_curr_thread, (long) entry_thread_state)); /* Setjmp catchpoint setup. */ old_jmpbuf_ptr = thr->heap->lj.jmpbuf_ptr; thr->heap->lj.jmpbuf_ptr = &our_jmpbuf; /* Prevent yields for the duration of the safe call. This only * matters if the executor makes safe calls to functions that * yield, this doesn't currently happen. */ thr->callstack_preventcount++; #if defined(DUK_USE_CPP_EXCEPTIONS) try { #else DUK_ASSERT(thr->heap->lj.jmpbuf_ptr == &our_jmpbuf); if (DUK_SETJMP(our_jmpbuf.jb) == 0) { /* Success path. */ #endif DUK_DDD(DUK_DDDPRINT("safe_call setjmp catchpoint setup complete")); duk__handle_safe_call_inner(thr, func, udata, #if defined(DUK_USE_ASSERTIONS) entry_valstack_bottom_byteoff, entry_callstack_top, #endif entry_curr_thread, entry_thread_state, idx_retbase, num_stack_rets); DUK_STATS_INC(thr->heap, stats_safecall_nothrow); /* Either pointer may be NULL (at entry), so don't assert */ thr->heap->lj.jmpbuf_ptr = old_jmpbuf_ptr; /* If calls happen inside the safe call, these are restored by * whatever calls are made. Reserve cannot decrease. */ DUK_ASSERT(thr->callstack_curr == entry_act); DUK_ASSERT((duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack) >= entry_valstack_end_byteoff); retval = DUK_EXEC_SUCCESS; #if defined(DUK_USE_CPP_EXCEPTIONS) } catch (duk_internal_exception &exc) { DUK_UNREF(exc); #else } else { /* Error path. */ #endif DUK_ASSERT((duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack) >= entry_valstack_end_byteoff); DUK_STATS_INC(thr->heap, stats_safecall_throw); duk__handle_safe_call_error(thr, entry_act, #if defined(DUK_USE_ASSERTIONS) entry_callstack_top, #endif entry_curr_thread, entry_thread_state, idx_retbase, num_stack_rets, entry_valstack_bottom_byteoff, old_jmpbuf_ptr); retval = DUK_EXEC_ERROR; } #if defined(DUK_USE_CPP_EXCEPTIONS) catch (duk_fatal_exception &exc) { DUK_D(DUK_DPRINT("rethrow duk_fatal_exception")); throw; } catch (std::exception &exc) { const char *what = exc.what(); DUK_ASSERT((duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack) >= entry_valstack_end_byteoff); DUK_STATS_INC(thr->heap, stats_safecall_throw); if (!what) { what = "unknown"; } DUK_D(DUK_DPRINT("unexpected c++ std::exception (perhaps thrown by user code)")); try { DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "caught invalid c++ std::exception '%s' (perhaps thrown by user code)", what); DUK_WO_NORETURN(return 0;); } catch (duk_internal_exception exc) { DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ std::exception")); DUK_UNREF(exc); duk__handle_safe_call_error(thr, entry_act, #if defined(DUK_USE_ASSERTIONS) entry_callstack_top, #endif entry_curr_thread, entry_thread_state, idx_retbase, num_stack_rets, entry_valstack_bottom_byteoff, old_jmpbuf_ptr); retval = DUK_EXEC_ERROR; } } catch (...) { DUK_D(DUK_DPRINT("unexpected c++ exception (perhaps thrown by user code)")); DUK_ASSERT((duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack) >= entry_valstack_end_byteoff); DUK_STATS_INC(thr->heap, stats_safecall_throw); try { DUK_ERROR_TYPE(thr, "caught invalid c++ exception (perhaps thrown by user code)"); DUK_WO_NORETURN(return 0;); } catch (duk_internal_exception exc) { DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ exception")); DUK_UNREF(exc); duk__handle_safe_call_error(thr, entry_act, #if defined(DUK_USE_ASSERTIONS) entry_callstack_top, #endif entry_curr_thread, entry_thread_state, idx_retbase, num_stack_rets, entry_valstack_bottom_byteoff, old_jmpbuf_ptr); retval = DUK_EXEC_ERROR; } } #endif DUK_ASSERT(thr->heap->lj.jmpbuf_ptr == old_jmpbuf_ptr); /* success/error path both do this */ DUK_ASSERT_LJSTATE_UNSET(thr->heap); DUK_ASSERT((duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack) >= entry_valstack_end_byteoff); duk__handle_safe_call_shared_unwind(thr, idx_retbase, num_stack_rets, #if defined(DUK_USE_ASSERTIONS) entry_callstack_top, #endif entry_call_recursion_depth, entry_curr_thread, entry_ptr_curr_pc); /* Restore preventcount. */ thr->callstack_preventcount--; DUK_ASSERT(thr->callstack_preventcount == entry_callstack_preventcount); /* Final asserts. */ DUK_ASSERT(thr->callstack_curr == entry_act); DUK_ASSERT((duk_size_t) ((duk_uint8_t *) thr->valstack_bottom - (duk_uint8_t *) thr->valstack) == entry_valstack_bottom_byteoff); DUK_ASSERT((duk_size_t) ((duk_uint8_t *) thr->valstack_end - (duk_uint8_t *) thr->valstack) >= entry_valstack_end_byteoff); DUK_ASSERT(thr->callstack_top == entry_callstack_top); DUK_ASSERT(thr->heap->call_recursion_depth == entry_call_recursion_depth); DUK_ASSERT(thr->heap->curr_thread == entry_curr_thread); DUK_ASSERT(thr->state == entry_thread_state); DUK_ASSERT(thr->ptr_curr_pc == entry_ptr_curr_pc); DUK_ASSERT(duk_get_top(thr) == idx_retbase + num_stack_rets); DUK_ASSERT_LJSTATE_UNSET(thr->heap); /* Pending side effects. */ DUK_REFZERO_CHECK_FAST(thr); return retval; } /* * Property-based call (foo.noSuch()) error setup: replace target function * on stack top with a hidden Symbol tagged non-callable wrapper object * holding the error. The error gets thrown in call handling at the * proper spot to follow ECMAScript semantics. */ #if defined(DUK_USE_VERBOSE_ERRORS) DUK_INTERNAL DUK_NOINLINE DUK_COLD void duk_call_setup_propcall_error(duk_hthread *thr, duk_tval *tv_base, duk_tval *tv_key) { const char *str_targ, *str_key, *str_base; duk_idx_t entry_top; entry_top = duk_get_top(thr); /* [ target ] */ /* Must stabilize pointers first. tv_targ is already on stack top. */ duk_push_tval(thr, tv_base); duk_push_tval(thr, tv_key); DUK_GC_TORTURE(thr->heap); duk_push_bare_object(thr); /* [ target base key {} ] */ /* We only push a wrapped error, replacing the call target (at * idx_func) with the error to ensure side effects come out * correctly: * - Property read * - Call argument evaluation * - Callability check and error thrown * * A hidden Symbol on the wrapper object pushed above is used by * call handling to figure out the error is to be thrown as is. * It is CRITICAL that the hidden Symbol can never occur on a * user visible object that may get thrown. */ #if defined(DUK_USE_PARANOID_ERRORS) str_targ = duk_get_type_name(thr, -4); str_key = duk_get_type_name(thr, -2); str_base = duk_get_type_name(thr, -3); duk_push_error_object(thr, DUK_ERR_TYPE_ERROR | DUK_ERRCODE_FLAG_NOBLAME_FILELINE, "%s not callable (property %s of %s)", str_targ, str_key, str_base); duk_xdef_prop_stridx(thr, -2, DUK_STRIDX_INT_TARGET, DUK_PROPDESC_FLAGS_NONE); /* Marker property, reuse _Target. */ /* [ target base key { _Target: error } ] */ duk_replace(thr, entry_top - 1); #else str_targ = duk_push_string_readable(thr, -4); str_key = duk_push_string_readable(thr, -3); str_base = duk_push_string_readable(thr, -5); duk_push_error_object(thr, DUK_ERR_TYPE_ERROR | DUK_ERRCODE_FLAG_NOBLAME_FILELINE, "%s not callable (property %s of %s)", str_targ, str_key, str_base); /* [ target base key {} str_targ str_key str_base error ] */ duk_xdef_prop_stridx(thr, -5, DUK_STRIDX_INT_TARGET, DUK_PROPDESC_FLAGS_NONE); /* Marker property, reuse _Target. */ /* [ target base key { _Target: error } str_targ str_key str_base ] */ duk_swap(thr, -4, entry_top - 1); /* [ { _Target: error } base key target str_targ str_key str_base ] */ #endif /* [ { _Target: error } */ duk_set_top(thr, entry_top); /* [ { _Target: error } */ DUK_ASSERT(!duk_is_callable(thr, -1)); /* Critical so that call handling will throw the error. */ } #endif /* DUK_USE_VERBOSE_ERRORS */ /* automatic undefs */ #undef DUK__AUGMENT_CALL_RELAX_COUNT #undef DUK__CALL_HANDLING_REQUIRE_STACK /* * ECMAScript compiler. * * Parses an input string and generates a function template result. * Compilation may happen in multiple contexts (global code, eval * code, function code). * * The parser uses a traditional top-down recursive parsing for the * statement level, and an operator precedence based top-down approach * for the expression level. The attempt is to minimize the C stack * depth. Bytecode is generated directly without an intermediate * representation (tree), at the cost of needing two (and sometimes * three) passes over each function. * * The top-down recursive parser functions are named "duk__parse_XXX". * * Recursion limits are in key functions to prevent arbitrary C recursion: * function body parsing, statement parsing, and expression parsing. * * See doc/compiler.rst for discussion on the design. * * A few typing notes: * * - duk_regconst_t: signed, highest bit set (< 0) means constant, * some call sites use -1 for "none" (equivalent to constant 0x7fffffff) * - PC values: duk_int_t, negative values used as markers */ /* #include duk_internal.h -> already included */ /* If highest bit of a register number is set, it refers to a constant instead. * When interpreted as a signed value, this means const values are always * negative (when interpreted as two's complement). For example DUK__ISREG_TEMP() * uses this approach to avoid an explicit DUK__ISREG() check (the condition is * logically "'x' is a register AND 'x' >= temp_first"). */ #define DUK__CONST_MARKER DUK_REGCONST_CONST_MARKER #define DUK__REMOVECONST(x) ((x) & ~DUK__CONST_MARKER) #define DUK__ISREG(x) ((x) >= 0) #define DUK__ISCONST(x) ((x) < 0) #define DUK__ISREG_TEMP(comp_ctx,x) ((duk_int32_t) (x) >= (duk_int32_t) ((comp_ctx)->curr_func.temp_first)) /* Check for x >= temp_first && x >= 0 by comparing as signed. */ #define DUK__ISREG_NOTTEMP(comp_ctx,x) ((duk_uint32_t) (x) < (duk_uint32_t) ((comp_ctx)->curr_func.temp_first)) /* Check for x >= 0 && x < temp_first by interpreting as unsigned. */ #define DUK__GETTEMP(comp_ctx) ((comp_ctx)->curr_func.temp_next) #define DUK__SETTEMP(comp_ctx,x) ((comp_ctx)->curr_func.temp_next = (x)) /* dangerous: must only lower (temp_max not updated) */ #define DUK__SETTEMP_CHECKMAX(comp_ctx,x) duk__settemp_checkmax((comp_ctx),(x)) #define DUK__ALLOCTEMP(comp_ctx) duk__alloctemp((comp_ctx)) #define DUK__ALLOCTEMPS(comp_ctx,count) duk__alloctemps((comp_ctx),(count)) /* Init value set size for array and object literals. */ #define DUK__MAX_ARRAY_INIT_VALUES 20 #define DUK__MAX_OBJECT_INIT_PAIRS 10 /* XXX: hack, remove when const lookup is not O(n) */ #define DUK__GETCONST_MAX_CONSTS_CHECK 256 /* These limits are based on bytecode limits. Max temps is limited * by duk_hcompfunc nargs/nregs fields being 16 bits. */ #define DUK__MAX_CONSTS DUK_BC_BC_MAX #define DUK__MAX_FUNCS DUK_BC_BC_MAX #define DUK__MAX_TEMPS 0xffffL /* Initial bytecode size allocation. */ #if defined(DUK_USE_PREFER_SIZE) #define DUK__BC_INITIAL_INSTS 16 #else #define DUK__BC_INITIAL_INSTS 256 #endif #define DUK__RECURSION_INCREASE(comp_ctx,thr) do { \ DUK_DDD(DUK_DDDPRINT("RECURSION INCREASE: %s:%ld", (const char *) DUK_FILE_MACRO, (long) DUK_LINE_MACRO)); \ duk__comp_recursion_increase((comp_ctx)); \ } while (0) #define DUK__RECURSION_DECREASE(comp_ctx,thr) do { \ DUK_DDD(DUK_DDDPRINT("RECURSION DECREASE: %s:%ld", (const char *) DUK_FILE_MACRO, (long) DUK_LINE_MACRO)); \ duk__comp_recursion_decrease((comp_ctx)); \ } while (0) /* Value stack slot limits: these are quite approximate right now, and * because they overlap in control flow, some could be eliminated. */ #define DUK__COMPILE_ENTRY_SLOTS 8 #define DUK__FUNCTION_INIT_REQUIRE_SLOTS 16 #define DUK__FUNCTION_BODY_REQUIRE_SLOTS 16 #define DUK__PARSE_STATEMENTS_SLOTS 16 #define DUK__PARSE_EXPR_SLOTS 16 /* Temporary structure used to pass a stack allocated region through * duk_safe_call(). */ typedef struct { duk_small_uint_t flags; duk_compiler_ctx comp_ctx_alloc; duk_lexer_point lex_pt_alloc; } duk__compiler_stkstate; /* * Prototypes */ /* lexing */ DUK_LOCAL_DECL void duk__advance_helper(duk_compiler_ctx *comp_ctx, duk_small_int_t expect); DUK_LOCAL_DECL void duk__advance_expect(duk_compiler_ctx *comp_ctx, duk_small_int_t expect); DUK_LOCAL_DECL void duk__advance(duk_compiler_ctx *ctx); /* function helpers */ DUK_LOCAL_DECL void duk__init_func_valstack_slots(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL void duk__reset_func_for_pass2(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL void duk__init_varmap_and_prologue_for_pass2(duk_compiler_ctx *comp_ctx, duk_regconst_t *out_stmt_value_reg); DUK_LOCAL_DECL void duk__convert_to_func_template(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL duk_int_t duk__cleanup_varmap(duk_compiler_ctx *comp_ctx); /* code emission */ DUK_LOCAL_DECL duk_int_t duk__get_current_pc(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL duk_compiler_instr *duk__get_instr_ptr(duk_compiler_ctx *comp_ctx, duk_int_t pc); DUK_LOCAL_DECL void duk__emit(duk_compiler_ctx *comp_ctx, duk_instr_t ins); DUK_LOCAL_DECL void duk__emit_op_only(duk_compiler_ctx *comp_ctx, duk_small_uint_t op); DUK_LOCAL_DECL void duk__emit_a_b_c(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t b, duk_regconst_t c); DUK_LOCAL_DECL void duk__emit_a_b(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t b); DUK_LOCAL_DECL void duk__emit_b_c(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t b, duk_regconst_t c); #if 0 /* unused */ DUK_LOCAL_DECL void duk__emit_a(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a); DUK_LOCAL_DECL void duk__emit_b(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t b); #endif DUK_LOCAL_DECL void duk__emit_a_bc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t bc); DUK_LOCAL_DECL void duk__emit_bc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op, duk_regconst_t bc); DUK_LOCAL_DECL void duk__emit_abc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op, duk_regconst_t abc); DUK_LOCAL_DECL void duk__emit_load_int32(duk_compiler_ctx *comp_ctx, duk_regconst_t reg, duk_int32_t val); DUK_LOCAL_DECL void duk__emit_load_int32_noshuffle(duk_compiler_ctx *comp_ctx, duk_regconst_t reg, duk_int32_t val); DUK_LOCAL_DECL void duk__emit_jump(duk_compiler_ctx *comp_ctx, duk_int_t target_pc); DUK_LOCAL_DECL duk_int_t duk__emit_jump_empty(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL void duk__insert_jump_entry(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc); DUK_LOCAL_DECL void duk__patch_jump(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc, duk_int_t target_pc); DUK_LOCAL_DECL void duk__patch_jump_here(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc); DUK_LOCAL_DECL void duk__patch_trycatch(duk_compiler_ctx *comp_ctx, duk_int_t ldconst_pc, duk_int_t trycatch_pc, duk_regconst_t reg_catch, duk_regconst_t const_varname, duk_small_uint_t flags); DUK_LOCAL_DECL void duk__emit_if_false_skip(duk_compiler_ctx *comp_ctx, duk_regconst_t regconst); DUK_LOCAL_DECL void duk__emit_if_true_skip(duk_compiler_ctx *comp_ctx, duk_regconst_t regconst); DUK_LOCAL_DECL void duk__emit_invalid(duk_compiler_ctx *comp_ctx); /* ivalue/ispec helpers */ DUK_LOCAL_DECL void duk__ivalue_regconst(duk_ivalue *x, duk_regconst_t regconst); DUK_LOCAL_DECL void duk__ivalue_plain_fromstack(duk_compiler_ctx *comp_ctx, duk_ivalue *x); DUK_LOCAL_DECL void duk__ivalue_var_fromstack(duk_compiler_ctx *comp_ctx, duk_ivalue *x); DUK_LOCAL_DECL void duk__ivalue_var_hstring(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_hstring *h); DUK_LOCAL_DECL void duk__copy_ispec(duk_compiler_ctx *comp_ctx, duk_ispec *src, duk_ispec *dst); DUK_LOCAL_DECL void duk__copy_ivalue(duk_compiler_ctx *comp_ctx, duk_ivalue *src, duk_ivalue *dst); DUK_LOCAL_DECL duk_regconst_t duk__alloctemps(duk_compiler_ctx *comp_ctx, duk_small_int_t num); DUK_LOCAL_DECL duk_regconst_t duk__alloctemp(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL void duk__settemp_checkmax(duk_compiler_ctx *comp_ctx, duk_regconst_t temp_next); DUK_LOCAL_DECL duk_regconst_t duk__getconst(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL duk_regconst_t duk__ispec_toregconst_raw(duk_compiler_ctx *comp_ctx, duk_ispec *x, duk_regconst_t forced_reg, duk_small_uint_t flags); DUK_LOCAL_DECL void duk__ispec_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ispec *x, duk_regconst_t forced_reg); DUK_LOCAL_DECL void duk__ivalue_toplain_raw(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_regconst_t forced_reg); DUK_LOCAL_DECL void duk__ivalue_toplain(duk_compiler_ctx *comp_ctx, duk_ivalue *x); DUK_LOCAL_DECL void duk__ivalue_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *x); DUK_LOCAL_DECL duk_regconst_t duk__ivalue_toregconst_raw(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_regconst_t forced_reg, duk_small_uint_t flags); DUK_LOCAL_DECL duk_regconst_t duk__ivalue_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *x); #if 0 /* unused */ DUK_LOCAL_DECL duk_regconst_t duk__ivalue_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *x); #endif DUK_LOCAL_DECL void duk__ivalue_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_int_t forced_reg); DUK_LOCAL_DECL duk_regconst_t duk__ivalue_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *x); DUK_LOCAL_DECL duk_regconst_t duk__ivalue_totempconst(duk_compiler_ctx *comp_ctx, duk_ivalue *x); /* identifier handling */ DUK_LOCAL_DECL duk_regconst_t duk__lookup_active_register_binding(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL duk_bool_t duk__lookup_lhs(duk_compiler_ctx *ctx, duk_regconst_t *out_reg_varbind, duk_regconst_t *out_rc_varname); /* label handling */ DUK_LOCAL_DECL void duk__add_label(duk_compiler_ctx *comp_ctx, duk_hstring *h_label, duk_int_t pc_label, duk_int_t label_id); DUK_LOCAL_DECL void duk__update_label_flags(duk_compiler_ctx *comp_ctx, duk_int_t label_id, duk_small_uint_t flags); DUK_LOCAL_DECL void duk__lookup_active_label(duk_compiler_ctx *comp_ctx, duk_hstring *h_label, duk_bool_t is_break, duk_int_t *out_label_id, duk_int_t *out_label_catch_depth, duk_int_t *out_label_pc, duk_bool_t *out_is_closest); DUK_LOCAL_DECL void duk__reset_labels_to_length(duk_compiler_ctx *comp_ctx, duk_size_t len); /* top-down expression parser */ DUK_LOCAL_DECL void duk__expr_nud(duk_compiler_ctx *comp_ctx, duk_ivalue *res); DUK_LOCAL_DECL void duk__expr_led(duk_compiler_ctx *comp_ctx, duk_ivalue *left, duk_ivalue *res); DUK_LOCAL_DECL duk_small_uint_t duk__expr_lbp(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL duk_bool_t duk__expr_is_empty(duk_compiler_ctx *comp_ctx); /* exprtop is the top level variant which resets nud/led counts */ DUK_LOCAL_DECL void duk__expr(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); DUK_LOCAL_DECL void duk__exprtop(duk_compiler_ctx *ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); /* convenience helpers */ #if 0 /* unused */ DUK_LOCAL_DECL duk_regconst_t duk__expr_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); #endif #if 0 /* unused */ DUK_LOCAL_DECL duk_regconst_t duk__expr_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); #endif DUK_LOCAL_DECL void duk__expr_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags, duk_regconst_t forced_reg); DUK_LOCAL_DECL duk_regconst_t duk__expr_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); #if 0 /* unused */ DUK_LOCAL_DECL duk_regconst_t duk__expr_totempconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); #endif DUK_LOCAL_DECL void duk__expr_toplain(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); DUK_LOCAL_DECL void duk__expr_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); DUK_LOCAL_DECL duk_regconst_t duk__exprtop_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); #if 0 /* unused */ DUK_LOCAL_DECL duk_regconst_t duk__exprtop_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); #endif DUK_LOCAL_DECL void duk__exprtop_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags, duk_regconst_t forced_reg); DUK_LOCAL_DECL duk_regconst_t duk__exprtop_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); #if 0 /* unused */ DUK_LOCAL_DECL void duk__exprtop_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags); #endif /* expression parsing helpers */ DUK_LOCAL_DECL duk_int_t duk__parse_arguments(duk_compiler_ctx *comp_ctx, duk_ivalue *res); DUK_LOCAL_DECL void duk__nud_array_literal(duk_compiler_ctx *comp_ctx, duk_ivalue *res); DUK_LOCAL_DECL void duk__nud_object_literal(duk_compiler_ctx *comp_ctx, duk_ivalue *res); /* statement parsing */ DUK_LOCAL_DECL void duk__parse_var_decl(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t expr_flags, duk_regconst_t *out_reg_varbind, duk_regconst_t *out_rc_varname); DUK_LOCAL_DECL void duk__parse_var_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t expr_flags); DUK_LOCAL_DECL void duk__parse_for_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site); DUK_LOCAL_DECL void duk__parse_switch_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site); DUK_LOCAL_DECL void duk__parse_if_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res); DUK_LOCAL_DECL void duk__parse_do_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site); DUK_LOCAL_DECL void duk__parse_while_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site); DUK_LOCAL_DECL void duk__parse_break_or_continue_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res); DUK_LOCAL_DECL void duk__parse_return_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res); DUK_LOCAL_DECL void duk__parse_throw_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res); DUK_LOCAL_DECL void duk__parse_try_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res); DUK_LOCAL_DECL void duk__parse_with_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res); DUK_LOCAL_DECL void duk__parse_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_bool_t allow_source_elem); DUK_LOCAL_DECL duk_int_t duk__stmt_label_site(duk_compiler_ctx *comp_ctx, duk_int_t label_id); DUK_LOCAL_DECL void duk__parse_stmts(duk_compiler_ctx *comp_ctx, duk_bool_t allow_source_elem, duk_bool_t expect_eof, duk_bool_t regexp_after); DUK_LOCAL_DECL void duk__parse_func_body(duk_compiler_ctx *comp_ctx, duk_bool_t expect_eof, duk_bool_t implicit_return_value, duk_bool_t regexp_after, duk_small_int_t expect_token); DUK_LOCAL_DECL void duk__parse_func_formals(duk_compiler_ctx *comp_ctx); DUK_LOCAL_DECL void duk__parse_func_like_raw(duk_compiler_ctx *comp_ctx, duk_small_uint_t flags); DUK_LOCAL_DECL duk_int_t duk__parse_func_like_fnum(duk_compiler_ctx *comp_ctx, duk_small_uint_t flags); #define DUK__FUNC_FLAG_DECL (1 << 0) /* Parsing a function declaration. */ #define DUK__FUNC_FLAG_GETSET (1 << 1) /* Parsing an object literal getter/setter. */ #define DUK__FUNC_FLAG_METDEF (1 << 2) /* Parsing an object literal method definition shorthand. */ #define DUK__FUNC_FLAG_PUSHNAME_PASS1 (1 << 3) /* Push function name when creating template (first pass only). */ #define DUK__FUNC_FLAG_USE_PREVTOKEN (1 << 4) /* Use prev_token to start function parsing (workaround for object literal). */ /* * Parser control values for tokens. The token table is ordered by the * DUK_TOK_XXX defines. * * The binding powers are for lbp() use (i.e. for use in led() context). * Binding powers are positive for typing convenience, and bits at the * top should be reserved for flags. Binding power step must be higher * than 1 so that binding power "lbp - 1" can be used for right associative * operators. Currently a step of 2 is used (which frees one more bit for * flags). */ /* XXX: actually single step levels would work just fine, clean up */ /* binding power "levels" (see doc/compiler.rst) */ #define DUK__BP_INVALID 0 /* always terminates led() */ #define DUK__BP_EOF 2 #define DUK__BP_CLOSING 4 /* token closes expression, e.g. ')', ']' */ #define DUK__BP_FOR_EXPR DUK__BP_CLOSING /* bp to use when parsing a top level Expression */ #define DUK__BP_COMMA 6 #define DUK__BP_ASSIGNMENT 8 #define DUK__BP_CONDITIONAL 10 #define DUK__BP_LOR 12 #define DUK__BP_LAND 14 #define DUK__BP_BOR 16 #define DUK__BP_BXOR 18 #define DUK__BP_BAND 20 #define DUK__BP_EQUALITY 22 #define DUK__BP_RELATIONAL 24 #define DUK__BP_SHIFT 26 #define DUK__BP_ADDITIVE 28 #define DUK__BP_MULTIPLICATIVE 30 #define DUK__BP_EXPONENTIATION 32 #define DUK__BP_POSTFIX 34 #define DUK__BP_CALL 36 #define DUK__BP_MEMBER 38 #define DUK__TOKEN_LBP_BP_MASK 0x1f #define DUK__TOKEN_LBP_FLAG_NO_REGEXP (1 << 5) /* regexp literal must not follow this token */ #define DUK__TOKEN_LBP_FLAG_TERMINATES (1 << 6) /* terminates expression; e.g. post-increment/-decrement */ #define DUK__TOKEN_LBP_FLAG_UNUSED (1 << 7) /* unused */ #define DUK__TOKEN_LBP_GET_BP(x) ((duk_small_uint_t) (((x) & DUK__TOKEN_LBP_BP_MASK) * 2)) #define DUK__MK_LBP(bp) ((bp) >> 1) /* bp is assumed to be even */ #define DUK__MK_LBP_FLAGS(bp,flags) (((bp) >> 1) | (flags)) DUK_LOCAL const duk_uint8_t duk__token_lbp[] = { DUK__MK_LBP(DUK__BP_EOF), /* DUK_TOK_EOF */ DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_IDENTIFIER */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_BREAK */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CASE */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CATCH */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CONTINUE */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_DEBUGGER */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_DEFAULT */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_DELETE */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_DO */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_ELSE */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_FINALLY */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_FOR */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_FUNCTION */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_IF */ DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_IN */ DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_INSTANCEOF */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_NEW */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_RETURN */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_SWITCH */ DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_THIS */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_THROW */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_TRY */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_TYPEOF */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_VAR */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CONST */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_VOID */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_WHILE */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_WITH */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CLASS */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_ENUM */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_EXPORT */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_EXTENDS */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_IMPORT */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_SUPER */ DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_NULL */ DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_TRUE */ DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_FALSE */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_GET */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_SET */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_IMPLEMENTS */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_INTERFACE */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_LET */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_PACKAGE */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_PRIVATE */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_PROTECTED */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_PUBLIC */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_STATIC */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_YIELD */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_LCURLY */ DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_RCURLY */ DUK__MK_LBP(DUK__BP_MEMBER), /* DUK_TOK_LBRACKET */ DUK__MK_LBP_FLAGS(DUK__BP_CLOSING, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_RBRACKET */ DUK__MK_LBP(DUK__BP_CALL), /* DUK_TOK_LPAREN */ DUK__MK_LBP_FLAGS(DUK__BP_CLOSING, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_RPAREN */ DUK__MK_LBP(DUK__BP_MEMBER), /* DUK_TOK_PERIOD */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_SEMICOLON */ DUK__MK_LBP(DUK__BP_COMMA), /* DUK_TOK_COMMA */ DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_LT */ DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_GT */ DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_LE */ DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_GE */ DUK__MK_LBP(DUK__BP_EQUALITY), /* DUK_TOK_EQ */ DUK__MK_LBP(DUK__BP_EQUALITY), /* DUK_TOK_NEQ */ DUK__MK_LBP(DUK__BP_EQUALITY), /* DUK_TOK_SEQ */ DUK__MK_LBP(DUK__BP_EQUALITY), /* DUK_TOK_SNEQ */ DUK__MK_LBP(DUK__BP_ADDITIVE), /* DUK_TOK_ADD */ DUK__MK_LBP(DUK__BP_ADDITIVE), /* DUK_TOK_SUB */ DUK__MK_LBP(DUK__BP_MULTIPLICATIVE), /* DUK_TOK_MUL */ DUK__MK_LBP(DUK__BP_MULTIPLICATIVE), /* DUK_TOK_DIV */ DUK__MK_LBP(DUK__BP_MULTIPLICATIVE), /* DUK_TOK_MOD */ DUK__MK_LBP(DUK__BP_EXPONENTIATION), /* DUK_TOK_EXP */ DUK__MK_LBP_FLAGS(DUK__BP_POSTFIX, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_INCREMENT */ DUK__MK_LBP_FLAGS(DUK__BP_POSTFIX, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_DECREMENT */ DUK__MK_LBP(DUK__BP_SHIFT), /* DUK_TOK_ALSHIFT */ DUK__MK_LBP(DUK__BP_SHIFT), /* DUK_TOK_ARSHIFT */ DUK__MK_LBP(DUK__BP_SHIFT), /* DUK_TOK_RSHIFT */ DUK__MK_LBP(DUK__BP_BAND), /* DUK_TOK_BAND */ DUK__MK_LBP(DUK__BP_BOR), /* DUK_TOK_BOR */ DUK__MK_LBP(DUK__BP_BXOR), /* DUK_TOK_BXOR */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_LNOT */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_BNOT */ DUK__MK_LBP(DUK__BP_LAND), /* DUK_TOK_LAND */ DUK__MK_LBP(DUK__BP_LOR), /* DUK_TOK_LOR */ DUK__MK_LBP(DUK__BP_CONDITIONAL), /* DUK_TOK_QUESTION */ DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_COLON */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_EQUALSIGN */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_ADD_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_SUB_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_MUL_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_DIV_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_MOD_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_EXP_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_ALSHIFT_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_ARSHIFT_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_RSHIFT_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_BAND_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_BOR_EQ */ DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_BXOR_EQ */ DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_NUMBER */ DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_STRING */ DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_REGEXP */ }; /* * Misc helpers */ DUK_LOCAL void duk__comp_recursion_increase(duk_compiler_ctx *comp_ctx) { DUK_ASSERT(comp_ctx != NULL); DUK_ASSERT(comp_ctx->recursion_depth >= 0); if (comp_ctx->recursion_depth >= comp_ctx->recursion_limit) { DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_COMPILER_RECURSION_LIMIT); DUK_WO_NORETURN(return;); } comp_ctx->recursion_depth++; } DUK_LOCAL void duk__comp_recursion_decrease(duk_compiler_ctx *comp_ctx) { DUK_ASSERT(comp_ctx != NULL); DUK_ASSERT(comp_ctx->recursion_depth > 0); comp_ctx->recursion_depth--; } DUK_LOCAL duk_bool_t duk__hstring_is_eval_or_arguments(duk_compiler_ctx *comp_ctx, duk_hstring *h) { DUK_UNREF(comp_ctx); DUK_ASSERT(h != NULL); return DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(h); } DUK_LOCAL duk_bool_t duk__hstring_is_eval_or_arguments_in_strict_mode(duk_compiler_ctx *comp_ctx, duk_hstring *h) { DUK_ASSERT(h != NULL); return (comp_ctx->curr_func.is_strict && DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(h)); } /* * Parser duk__advance() token eating functions */ /* XXX: valstack handling is awkward. Add a valstack helper which * avoids dup():ing; valstack_copy(src, dst)? */ DUK_LOCAL void duk__advance_helper(duk_compiler_ctx *comp_ctx, duk_small_int_t expect) { duk_hthread *thr = comp_ctx->thr; duk_bool_t regexp; DUK_ASSERT_DISABLE(comp_ctx->curr_token.t >= 0); /* unsigned */ DUK_ASSERT(comp_ctx->curr_token.t <= DUK_TOK_MAXVAL); /* MAXVAL is inclusive */ /* * Use current token to decide whether a RegExp can follow. * * We can use either 't' or 't_nores'; the latter would not * recognize keywords. Some keywords can be followed by a * RegExp (e.g. "return"), so using 't' is better. This is * not trivial, see doc/compiler.rst. */ regexp = 1; if (duk__token_lbp[comp_ctx->curr_token.t] & DUK__TOKEN_LBP_FLAG_NO_REGEXP) { regexp = 0; } if (comp_ctx->curr_func.reject_regexp_in_adv) { comp_ctx->curr_func.reject_regexp_in_adv = 0; regexp = 0; } if (comp_ctx->curr_func.allow_regexp_in_adv) { comp_ctx->curr_func.allow_regexp_in_adv = 0; regexp = 1; } if (expect >= 0 && comp_ctx->curr_token.t != (duk_small_uint_t) expect) { DUK_D(DUK_DPRINT("parse error: expect=%ld, got=%ld", (long) expect, (long) comp_ctx->curr_token.t)); DUK_ERROR_SYNTAX(thr, DUK_STR_PARSE_ERROR); DUK_WO_NORETURN(return;); } /* make current token the previous; need to fiddle with valstack "backing store" */ duk_memcpy(&comp_ctx->prev_token, &comp_ctx->curr_token, sizeof(duk_token)); duk_copy(thr, comp_ctx->tok11_idx, comp_ctx->tok21_idx); duk_copy(thr, comp_ctx->tok12_idx, comp_ctx->tok22_idx); /* parse new token */ duk_lexer_parse_js_input_element(&comp_ctx->lex, &comp_ctx->curr_token, comp_ctx->curr_func.is_strict, regexp); DUK_DDD(DUK_DDDPRINT("advance: curr: tok=%ld/%ld,%ld,term=%ld,%!T,%!T " "prev: tok=%ld/%ld,%ld,term=%ld,%!T,%!T", (long) comp_ctx->curr_token.t, (long) comp_ctx->curr_token.t_nores, (long) comp_ctx->curr_token.start_line, (long) comp_ctx->curr_token.lineterm, (duk_tval *) duk_get_tval(thr, comp_ctx->tok11_idx), (duk_tval *) duk_get_tval(thr, comp_ctx->tok12_idx), (long) comp_ctx->prev_token.t, (long) comp_ctx->prev_token.t_nores, (long) comp_ctx->prev_token.start_line, (long) comp_ctx->prev_token.lineterm, (duk_tval *) duk_get_tval(thr, comp_ctx->tok21_idx), (duk_tval *) duk_get_tval(thr, comp_ctx->tok22_idx))); } /* advance, expecting current token to be a specific token; parse next token in regexp context */ DUK_LOCAL void duk__advance_expect(duk_compiler_ctx *comp_ctx, duk_small_int_t expect) { duk__advance_helper(comp_ctx, expect); } /* advance, whatever the current token is; parse next token in regexp context */ DUK_LOCAL void duk__advance(duk_compiler_ctx *comp_ctx) { duk__advance_helper(comp_ctx, -1); } /* * Helpers for duk_compiler_func. */ /* init function state: inits valstack allocations */ DUK_LOCAL void duk__init_func_valstack_slots(duk_compiler_ctx *comp_ctx) { duk_compiler_func *func = &comp_ctx->curr_func; duk_hthread *thr = comp_ctx->thr; duk_idx_t entry_top; entry_top = duk_get_top(thr); duk_memzero(func, sizeof(*func)); /* intentional overlap with earlier memzero */ #if defined(DUK_USE_EXPLICIT_NULL_INIT) func->h_name = NULL; func->h_consts = NULL; func->h_funcs = NULL; func->h_decls = NULL; func->h_labelnames = NULL; func->h_labelinfos = NULL; func->h_argnames = NULL; func->h_varmap = NULL; #endif duk_require_stack(thr, DUK__FUNCTION_INIT_REQUIRE_SLOTS); DUK_BW_INIT_PUSHBUF(thr, &func->bw_code, DUK__BC_INITIAL_INSTS * sizeof(duk_compiler_instr)); /* code_idx = entry_top + 0 */ duk_push_bare_array(thr); func->consts_idx = entry_top + 1; func->h_consts = DUK_GET_HOBJECT_POSIDX(thr, entry_top + 1); DUK_ASSERT(func->h_consts != NULL); duk_push_bare_array(thr); func->funcs_idx = entry_top + 2; func->h_funcs = DUK_GET_HOBJECT_POSIDX(thr, entry_top + 2); DUK_ASSERT(func->h_funcs != NULL); DUK_ASSERT(func->fnum_next == 0); duk_push_bare_array(thr); func->decls_idx = entry_top + 3; func->h_decls = DUK_GET_HOBJECT_POSIDX(thr, entry_top + 3); DUK_ASSERT(func->h_decls != NULL); duk_push_bare_array(thr); func->labelnames_idx = entry_top + 4; func->h_labelnames = DUK_GET_HOBJECT_POSIDX(thr, entry_top + 4); DUK_ASSERT(func->h_labelnames != NULL); duk_push_dynamic_buffer(thr, 0); func->labelinfos_idx = entry_top + 5; func->h_labelinfos = (duk_hbuffer_dynamic *) duk_known_hbuffer(thr, entry_top + 5); DUK_ASSERT(func->h_labelinfos != NULL); DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(func->h_labelinfos) && !DUK_HBUFFER_HAS_EXTERNAL(func->h_labelinfos)); duk_push_bare_array(thr); func->argnames_idx = entry_top + 6; func->h_argnames = DUK_GET_HOBJECT_POSIDX(thr, entry_top + 6); DUK_ASSERT(func->h_argnames != NULL); duk_push_bare_object(thr); func->varmap_idx = entry_top + 7; func->h_varmap = DUK_GET_HOBJECT_POSIDX(thr, entry_top + 7); DUK_ASSERT(func->h_varmap != NULL); } /* reset function state (prepare for pass 2) */ DUK_LOCAL void duk__reset_func_for_pass2(duk_compiler_ctx *comp_ctx) { duk_compiler_func *func = &comp_ctx->curr_func; duk_hthread *thr = comp_ctx->thr; /* reset bytecode buffer but keep current size; pass 2 will * require same amount or more. */ DUK_BW_RESET_SIZE(thr, &func->bw_code); duk_set_length(thr, func->consts_idx, 0); /* keep func->h_funcs; inner functions are not reparsed to avoid O(depth^2) parsing */ func->fnum_next = 0; /* duk_set_length(thr, func->funcs_idx, 0); */ duk_set_length(thr, func->labelnames_idx, 0); duk_hbuffer_reset(thr, func->h_labelinfos); /* keep func->h_argnames; it is fixed for all passes */ /* truncated in case pass 3 needed */ duk_push_bare_object(thr); duk_replace(thr, func->varmap_idx); func->h_varmap = DUK_GET_HOBJECT_POSIDX(thr, func->varmap_idx); DUK_ASSERT(func->h_varmap != NULL); } /* cleanup varmap from any null entries, compact it, etc; returns number * of final entries after cleanup. */ DUK_LOCAL duk_int_t duk__cleanup_varmap(duk_compiler_ctx *comp_ctx) { duk_hthread *thr = comp_ctx->thr; duk_hobject *h_varmap; duk_hstring *h_key; duk_tval *tv; duk_uint32_t i, e_next; duk_int_t ret; /* [ ... varmap ] */ h_varmap = DUK_GET_HOBJECT_NEGIDX(thr, -1); DUK_ASSERT(h_varmap != NULL); ret = 0; e_next = DUK_HOBJECT_GET_ENEXT(h_varmap); for (i = 0; i < e_next; i++) { h_key = DUK_HOBJECT_E_GET_KEY(thr->heap, h_varmap, i); if (!h_key) { continue; } DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, h_varmap, i)); /* The entries can either be register numbers or 'null' values. * Thus, no need to DECREF them and get side effects. DECREF'ing * the keys (strings) can cause memory to be freed but no side * effects as strings don't have finalizers. This is why we can * rely on the object properties not changing from underneath us. */ tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, h_varmap, i); if (!DUK_TVAL_IS_NUMBER(tv)) { DUK_ASSERT(!DUK_TVAL_IS_HEAP_ALLOCATED(tv)); DUK_HOBJECT_E_SET_KEY(thr->heap, h_varmap, i, NULL); DUK_HSTRING_DECREF(thr, h_key); /* when key is NULL, value is garbage so no need to set */ } else { ret++; } } duk_compact_m1(thr); return ret; } /* Convert duk_compiler_func into a function template, leaving the result * on top of stack. */ /* XXX: awkward and bloated asm -- use faster internal accesses */ DUK_LOCAL void duk__convert_to_func_template(duk_compiler_ctx *comp_ctx) { duk_compiler_func *func = &comp_ctx->curr_func; duk_hthread *thr = comp_ctx->thr; duk_hcompfunc *h_res; duk_hbuffer_fixed *h_data; duk_size_t consts_count; duk_size_t funcs_count; duk_size_t code_count; duk_size_t code_size; duk_size_t data_size; duk_size_t i; duk_tval *p_const; duk_hobject **p_func; duk_instr_t *p_instr; duk_compiler_instr *q_instr; duk_tval *tv; duk_bool_t keep_varmap; duk_bool_t keep_formals; #if !defined(DUK_USE_DEBUGGER_SUPPORT) duk_size_t formals_length; #endif DUK_DDD(DUK_DDDPRINT("converting duk_compiler_func to function/template")); /* * Push result object and init its flags */ /* Valstack should suffice here, required on function valstack init */ h_res = duk_push_hcompfunc(thr); DUK_ASSERT(h_res != NULL); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) h_res) == thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, (duk_hobject *) h_res, NULL); /* Function templates are "bare objects". */ if (func->is_function) { DUK_DDD(DUK_DDDPRINT("function -> set NEWENV")); DUK_HOBJECT_SET_NEWENV((duk_hobject *) h_res); if (!func->is_arguments_shadowed) { /* arguments object would be accessible; note that shadowing * bindings are arguments or function declarations, neither * of which are deletable, so this is safe. */ if (func->id_access_arguments || func->may_direct_eval) { DUK_DDD(DUK_DDDPRINT("function may access 'arguments' object directly or " "indirectly -> set CREATEARGS")); DUK_HOBJECT_SET_CREATEARGS((duk_hobject *) h_res); } } } else if (func->is_eval && func->is_strict) { DUK_DDD(DUK_DDDPRINT("strict eval code -> set NEWENV")); DUK_HOBJECT_SET_NEWENV((duk_hobject *) h_res); } else { /* non-strict eval: env is caller's env or global env (direct vs. indirect call) * global code: env is is global env */ DUK_DDD(DUK_DDDPRINT("non-strict eval code or global code -> no NEWENV")); DUK_ASSERT(!DUK_HOBJECT_HAS_NEWENV((duk_hobject *) h_res)); } #if defined(DUK_USE_FUNC_NAME_PROPERTY) if (func->is_function && func->is_namebinding && func->h_name != NULL) { /* Object literal set/get functions have a name (property * name) but must not have a lexical name binding, see * test-bug-getset-func-name.js. */ DUK_DDD(DUK_DDDPRINT("function expression with a name -> set NAMEBINDING")); DUK_HOBJECT_SET_NAMEBINDING((duk_hobject *) h_res); } #endif if (func->is_strict) { DUK_DDD(DUK_DDDPRINT("function is strict -> set STRICT")); DUK_HOBJECT_SET_STRICT((duk_hobject *) h_res); } if (func->is_notail) { DUK_DDD(DUK_DDDPRINT("function is notail -> set NOTAIL")); DUK_HOBJECT_SET_NOTAIL((duk_hobject *) h_res); } if (func->is_constructable) { DUK_DDD(DUK_DDDPRINT("function is constructable -> set CONSTRUCTABLE")); DUK_HOBJECT_SET_CONSTRUCTABLE((duk_hobject *) h_res); } /* * Build function fixed size 'data' buffer, which contains bytecode, * constants, and inner function references. * * During the building phase 'data' is reachable but incomplete. * Only incref's occur during building (no refzero or GC happens), * so the building process is atomic. */ consts_count = duk_hobject_get_length(thr, func->h_consts); funcs_count = duk_hobject_get_length(thr, func->h_funcs) / 3; code_count = DUK_BW_GET_SIZE(thr, &func->bw_code) / sizeof(duk_compiler_instr); code_size = code_count * sizeof(duk_instr_t); data_size = consts_count * sizeof(duk_tval) + funcs_count * sizeof(duk_hobject *) + code_size; DUK_DDD(DUK_DDDPRINT("consts_count=%ld, funcs_count=%ld, code_size=%ld -> " "data_size=%ld*%ld + %ld*%ld + %ld = %ld", (long) consts_count, (long) funcs_count, (long) code_size, (long) consts_count, (long) sizeof(duk_tval), (long) funcs_count, (long) sizeof(duk_hobject *), (long) code_size, (long) data_size)); duk_push_fixed_buffer_nozero(thr, data_size); h_data = (duk_hbuffer_fixed *) (void *) duk_known_hbuffer(thr, -1); DUK_HCOMPFUNC_SET_DATA(thr->heap, h_res, (duk_hbuffer *) h_data); DUK_HEAPHDR_INCREF(thr, h_data); p_const = (duk_tval *) (void *) DUK_HBUFFER_FIXED_GET_DATA_PTR(thr->heap, h_data); for (i = 0; i < consts_count; i++) { DUK_ASSERT(i <= DUK_UARRIDX_MAX); /* const limits */ tv = duk_hobject_find_array_entry_tval_ptr(thr->heap, func->h_consts, (duk_uarridx_t) i); DUK_ASSERT(tv != NULL); DUK_TVAL_SET_TVAL(p_const, tv); p_const++; DUK_TVAL_INCREF(thr, tv); /* may be a string constant */ DUK_DDD(DUK_DDDPRINT("constant: %!T", (duk_tval *) tv)); } p_func = (duk_hobject **) p_const; DUK_HCOMPFUNC_SET_FUNCS(thr->heap, h_res, p_func); for (i = 0; i < funcs_count; i++) { duk_hobject *h; DUK_ASSERT(i * 3 <= DUK_UARRIDX_MAX); /* func limits */ tv = duk_hobject_find_array_entry_tval_ptr(thr->heap, func->h_funcs, (duk_uarridx_t) (i * 3)); DUK_ASSERT(tv != NULL); DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv)); h = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(h)); *p_func++ = h; DUK_HOBJECT_INCREF(thr, h); DUK_DDD(DUK_DDDPRINT("inner function: %p -> %!iO", (void *) h, (duk_heaphdr *) h)); } p_instr = (duk_instr_t *) p_func; DUK_HCOMPFUNC_SET_BYTECODE(thr->heap, h_res, p_instr); /* copy bytecode instructions one at a time */ q_instr = (duk_compiler_instr *) (void *) DUK_BW_GET_BASEPTR(thr, &func->bw_code); for (i = 0; i < code_count; i++) { p_instr[i] = q_instr[i].ins; } /* Note: 'q_instr' is still used below */ DUK_ASSERT((duk_uint8_t *) (p_instr + code_count) == DUK_HBUFFER_FIXED_GET_DATA_PTR(thr->heap, h_data) + data_size); duk_pop(thr); /* 'data' (and everything in it) is reachable through h_res now */ /* * Init non-property result fields * * 'nregs' controls how large a register frame is allocated. * * 'nargs' controls how many formal arguments are written to registers: * r0, ... r(nargs-1). The remaining registers are initialized to * undefined. */ DUK_ASSERT(func->temp_max >= 0); h_res->nregs = (duk_uint16_t) func->temp_max; h_res->nargs = (duk_uint16_t) duk_hobject_get_length(thr, func->h_argnames); DUK_ASSERT(h_res->nregs >= h_res->nargs); /* pass2 allocation handles this */ #if defined(DUK_USE_DEBUGGER_SUPPORT) h_res->start_line = (duk_uint32_t) func->min_line; h_res->end_line = (duk_uint32_t) func->max_line; #endif /* * Init object properties * * Properties should be added in decreasing order of access frequency. * (Not very critical for function templates.) */ DUK_DDD(DUK_DDDPRINT("init function properties")); /* [ ... res ] */ /* _Varmap: omitted if function is guaranteed not to do a slow path * identifier access that might be caught by locally declared variables. * The varmap can also be omitted if it turns out empty of actual * register mappings after a cleanup. When debugging is enabled, we * always need the varmap to be able to lookup variables at any point. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_DD(DUK_DDPRINT("keeping _Varmap because debugger support is enabled")); keep_varmap = 1; #else if (func->id_access_slow_own || /* directly uses slow accesses that may match own variables */ func->id_access_arguments || /* accesses 'arguments' directly */ func->may_direct_eval || /* may indirectly slow access through a direct eval */ funcs_count > 0) { /* has inner functions which may slow access (XXX: this can be optimized by looking at the inner functions) */ DUK_DD(DUK_DDPRINT("keeping _Varmap because of direct eval, slow path access that may match local variables, or presence of inner functions")); keep_varmap = 1; } else { DUK_DD(DUK_DDPRINT("dropping _Varmap")); keep_varmap = 0; } #endif if (keep_varmap) { duk_int_t num_used; duk_dup(thr, func->varmap_idx); num_used = duk__cleanup_varmap(comp_ctx); DUK_DDD(DUK_DDDPRINT("cleaned up varmap: %!T (num_used=%ld)", (duk_tval *) duk_get_tval(thr, -1), (long) num_used)); if (num_used > 0) { duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_VARMAP, DUK_PROPDESC_FLAGS_NONE); } else { DUK_DD(DUK_DDPRINT("varmap is empty after cleanup -> no need to add")); duk_pop(thr); } } /* _Formals: omitted if function is guaranteed not to need a (non-strict) * arguments object, and _Formals.length matches nargs exactly. * * Non-arrow functions can't see an outer function's 'argument' binding * (because they have their own), but arrow functions can. When arrow * functions are added, this condition would need to be added: * inner_arrow_funcs_count > 0 inner arrow functions may access 'arguments' */ #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_DD(DUK_DDPRINT("keeping _Formals because debugger support is enabled")); keep_formals = 1; #else formals_length = duk_get_length(thr, func->argnames_idx); if (formals_length != (duk_size_t) h_res->nargs) { /* Nargs not enough for closure .length: keep _Formals regardless * of its length. Shouldn't happen in practice at the moment. */ DUK_DD(DUK_DDPRINT("keeping _Formals because _Formals.length != nargs")); keep_formals = 1; } else if ((func->id_access_arguments || func->may_direct_eval) && (formals_length > 0)) { /* Direct eval (may access 'arguments') or accesses 'arguments' * explicitly: keep _Formals unless it is zero length. */ DUK_DD(DUK_DDPRINT("keeping _Formals because of direct eval or explicit access to 'arguments', and _Formals.length != 0")); keep_formals = 1; } else { DUK_DD(DUK_DDPRINT("omitting _Formals, nargs matches _Formals.length, so no properties added")); keep_formals = 0; } #endif if (keep_formals) { duk_dup(thr, func->argnames_idx); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_FORMALS, DUK_PROPDESC_FLAGS_NONE); } /* name */ #if defined(DUK_USE_FUNC_NAME_PROPERTY) if (func->h_name) { duk_push_hstring(thr, func->h_name); DUK_DD(DUK_DDPRINT("setting function template .name to %!T", duk_get_tval(thr, -1))); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE); } #endif /* DUK_USE_FUNC_NAME_PROPERTY */ /* _Source */ #if defined(DUK_USE_NONSTD_FUNC_SOURCE_PROPERTY) if (0) { /* XXX: Currently function source code is not stored, as it is not * required by the standard. Source code should not be stored by * default (user should enable it explicitly), and the source should * probably be compressed with a trivial text compressor; average * compression of 20-30% is quite easy to achieve even with a trivial * compressor (RLE + backwards lookup). * * Debugging needs source code to be useful: sometimes input code is * not found in files as it may be generated and then eval()'d, given * by dynamic C code, etc. * * Other issues: * * - Need tokenizer indices for start and end to substring * - Always normalize function declaration part? * - If we keep _Formals, only need to store body */ /* * For global or eval code this is straightforward. For functions * created with the Function constructor we only get the source for * the body and must manufacture the "function ..." part. * * For instance, for constructed functions (v8): * * > a = new Function("foo", "bar", "print(foo)"); * [Function] * > a.toString() * 'function anonymous(foo,bar) {\nprint(foo)\n}' * * Similarly for e.g. getters (v8): * * > x = { get a(foo,bar) { print(foo); } } * { a: [Getter] } * > Object.getOwnPropertyDescriptor(x, 'a').get.toString() * 'function a(foo,bar) { print(foo); }' */ #if 0 duk_push_literal(thr, "XXX"); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_SOURCE, DUK_PROPDESC_FLAGS_NONE); #endif } #endif /* DUK_USE_NONSTD_FUNC_SOURCE_PROPERTY */ /* _Pc2line */ #if defined(DUK_USE_PC2LINE) if (1) { /* * Size-optimized pc->line mapping. */ DUK_ASSERT(code_count <= DUK_COMPILER_MAX_BYTECODE_LENGTH); duk_hobject_pc2line_pack(thr, q_instr, (duk_uint_fast32_t) code_count); /* -> pushes fixed buffer */ duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_PC2LINE, DUK_PROPDESC_FLAGS_NONE); /* XXX: if assertions enabled, walk through all valid PCs * and check line mapping. */ } #endif /* DUK_USE_PC2LINE */ /* fileName */ #if defined(DUK_USE_FUNC_FILENAME_PROPERTY) if (comp_ctx->h_filename) { /* * Source filename (or equivalent), for identifying thrown errors. */ duk_push_hstring(thr, comp_ctx->h_filename); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_NONE); } #endif DUK_DD(DUK_DDPRINT("converted function: %!ixT", (duk_tval *) duk_get_tval(thr, -1))); /* * Compact the function template. */ duk_compact_m1(thr); /* * Debug dumping */ #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) { duk_hcompfunc *h; duk_instr_t *p, *p_start, *p_end; h = (duk_hcompfunc *) duk_get_hobject(thr, -1); p_start = (duk_instr_t *) DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, h); p_end = (duk_instr_t *) DUK_HCOMPFUNC_GET_CODE_END(thr->heap, h); p = p_start; while (p < p_end) { DUK_DDD(DUK_DDDPRINT("BC %04ld: %!I ; 0x%08lx op=%ld (%!X) a=%ld b=%ld c=%ld", (long) (p - p_start), (duk_instr_t) (*p), (unsigned long) (*p), (long) DUK_DEC_OP(*p), (long) DUK_DEC_OP(*p), (long) DUK_DEC_A(*p), (long) DUK_DEC_B(*p), (long) DUK_DEC_C(*p))); p++; } } #endif } /* * Code emission helpers * * Some emission helpers understand the range of target and source reg/const * values and automatically emit shuffling code if necessary. This is the * case when the slot in question (A, B, C) is used in the standard way and * for opcodes the emission helpers explicitly understand (like DUK_OP_MPUTOBJ). * * The standard way is that: * - slot A is a target register * - slot B is a source register/constant * - slot C is a source register/constant * * If a slot is used in a non-standard way the caller must indicate this * somehow. If a slot is used as a target instead of a source (or vice * versa), this can be indicated with a flag to trigger proper shuffling * (e.g. DUK__EMIT_FLAG_B_IS_TARGET). If the value in the slot is not * register/const related at all, the caller must ensure that the raw value * fits into the corresponding slot so as to not trigger shuffling. The * caller must set a "no shuffle" flag to ensure compilation fails if * shuffling were to be triggered because of an internal error. * * For slots B and C the raw slot size is 9 bits but one bit is reserved for * the reg/const indicator. To use the full 9-bit range for a raw value, * shuffling must be disabled with the DUK__EMIT_FLAG_NO_SHUFFLE_{B,C} flag. * Shuffling is only done for A, B, and C slots, not the larger BC or ABC slots. * * There is call handling specific understanding in the A-B-C emitter to * convert call setup and call instructions into indirect ones if necessary. */ /* Code emission flags, passed in the 'opcode' field. Opcode + flags * fit into 16 bits for now, so use duk_small_uint_t. */ #define DUK__EMIT_FLAG_NO_SHUFFLE_A (1 << 8) #define DUK__EMIT_FLAG_NO_SHUFFLE_B (1 << 9) #define DUK__EMIT_FLAG_NO_SHUFFLE_C (1 << 10) #define DUK__EMIT_FLAG_A_IS_SOURCE (1 << 11) /* slot A is a source (default: target) */ #define DUK__EMIT_FLAG_B_IS_TARGET (1 << 12) /* slot B is a target (default: source) */ #define DUK__EMIT_FLAG_C_IS_TARGET (1 << 13) /* slot C is a target (default: source) */ #define DUK__EMIT_FLAG_BC_REGCONST (1 << 14) /* slots B and C are reg/const */ #define DUK__EMIT_FLAG_RESERVE_JUMPSLOT (1 << 15) /* reserve a jumpslot after instr before target spilling, used for NEXTENUM */ /* XXX: macro smaller than call? */ DUK_LOCAL duk_int_t duk__get_current_pc(duk_compiler_ctx *comp_ctx) { duk_compiler_func *func; func = &comp_ctx->curr_func; return (duk_int_t) (DUK_BW_GET_SIZE(comp_ctx->thr, &func->bw_code) / sizeof(duk_compiler_instr)); } DUK_LOCAL duk_compiler_instr *duk__get_instr_ptr(duk_compiler_ctx *comp_ctx, duk_int_t pc) { DUK_ASSERT(pc >= 0); DUK_ASSERT((duk_size_t) pc < (duk_size_t) (DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) / sizeof(duk_compiler_instr))); return ((duk_compiler_instr *) (void *) DUK_BW_GET_BASEPTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code)) + pc; } /* emit instruction; could return PC but that's not needed in the majority * of cases. */ DUK_LOCAL void duk__emit(duk_compiler_ctx *comp_ctx, duk_instr_t ins) { #if defined(DUK_USE_PC2LINE) duk_int_t line; #endif duk_compiler_instr *instr; DUK_DDD(DUK_DDDPRINT("duk__emit: 0x%08lx curr_token.start_line=%ld prev_token.start_line=%ld pc=%ld --> %!I", (unsigned long) ins, (long) comp_ctx->curr_token.start_line, (long) comp_ctx->prev_token.start_line, (long) duk__get_current_pc(comp_ctx), (duk_instr_t) ins)); instr = (duk_compiler_instr *) (void *) DUK_BW_ENSURE_GETPTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code, sizeof(duk_compiler_instr)); DUK_BW_ADD_PTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code, sizeof(duk_compiler_instr)); #if defined(DUK_USE_PC2LINE) /* The line number tracking is a bit inconsistent right now, which * affects debugger accuracy. Mostly call sites emit opcodes when * they have parsed a token (say a terminating semicolon) and called * duk__advance(). In this case the line number of the previous * token is the most accurate one (except in prologue where * prev_token.start_line is 0). This is probably not 100% correct * right now. */ /* approximation, close enough */ line = comp_ctx->prev_token.start_line; if (line == 0) { line = comp_ctx->curr_token.start_line; } #endif instr->ins = ins; #if defined(DUK_USE_PC2LINE) instr->line = (duk_uint32_t) line; #endif #if defined(DUK_USE_DEBUGGER_SUPPORT) if (line < comp_ctx->curr_func.min_line) { comp_ctx->curr_func.min_line = line; } if (line > comp_ctx->curr_func.max_line) { comp_ctx->curr_func.max_line = line; } #endif /* Limit checks for bytecode byte size and line number. */ if (DUK_UNLIKELY(DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) > DUK_USE_ESBC_MAX_BYTES)) { goto fail_bc_limit; } #if defined(DUK_USE_PC2LINE) && defined(DUK_USE_ESBC_LIMITS) #if defined(DUK_USE_BUFLEN16) /* Buffer length is bounded to 0xffff automatically, avoid compile warning. */ if (DUK_UNLIKELY(line > DUK_USE_ESBC_MAX_LINENUMBER)) { goto fail_bc_limit; } #else if (DUK_UNLIKELY(line > DUK_USE_ESBC_MAX_LINENUMBER)) { goto fail_bc_limit; } #endif #endif return; fail_bc_limit: DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_BYTECODE_LIMIT); DUK_WO_NORETURN(return;); } /* Update function min/max line from current token. Needed to improve * function line range information for debugging, so that e.g. opening * curly brace is covered by line range even when no opcodes are emitted * for the line containing the brace. */ DUK_LOCAL void duk__update_lineinfo_currtoken(duk_compiler_ctx *comp_ctx) { #if defined(DUK_USE_DEBUGGER_SUPPORT) duk_int_t line; line = comp_ctx->curr_token.start_line; if (line == 0) { return; } if (line < comp_ctx->curr_func.min_line) { comp_ctx->curr_func.min_line = line; } if (line > comp_ctx->curr_func.max_line) { comp_ctx->curr_func.max_line = line; } #else DUK_UNREF(comp_ctx); #endif } DUK_LOCAL void duk__emit_op_only(duk_compiler_ctx *comp_ctx, duk_small_uint_t op) { duk__emit(comp_ctx, DUK_ENC_OP_ABC(op, 0)); } /* Important main primitive. */ DUK_LOCAL void duk__emit_a_b_c(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t b, duk_regconst_t c) { duk_instr_t ins = 0; duk_int_t a_out = -1; duk_int_t b_out = -1; duk_int_t c_out = -1; duk_int_t tmp; duk_small_uint_t op = op_flags & 0xffU; DUK_DDD(DUK_DDDPRINT("emit: op_flags=%04lx, a=%ld, b=%ld, c=%ld", (unsigned long) op_flags, (long) a, (long) b, (long) c)); /* We could rely on max temp/const checks: if they don't exceed BC * limit, nothing here can either (just asserts would be enough). * Currently we check for the limits, which provides additional * protection against creating invalid bytecode due to compiler * bugs. */ DUK_ASSERT_DISABLE((op_flags & 0xff) >= DUK_BC_OP_MIN); /* unsigned */ DUK_ASSERT((op_flags & 0xff) <= DUK_BC_OP_MAX); DUK_ASSERT(DUK__ISREG(a)); DUK_ASSERT(b != -1); /* Not 'none'. */ DUK_ASSERT(c != -1); /* Not 'none'. */ /* Input shuffling happens before the actual operation, while output * shuffling happens afterwards. Output shuffling decisions are still * made at the same time to reduce branch clutter; output shuffle decisions * are recorded into X_out variables. */ /* Slot A: currently no support for reg/const. */ #if defined(DUK_USE_SHUFFLE_TORTURE) if (a <= DUK_BC_A_MAX && (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_A)) { #else if (a <= DUK_BC_A_MAX) { #endif ; } else if (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_A) { DUK_D(DUK_DPRINT("out of regs: 'a' (reg) needs shuffling but shuffle prohibited, a: %ld", (long) a)); goto error_outofregs; } else if (a <= DUK_BC_BC_MAX) { comp_ctx->curr_func.needs_shuffle = 1; tmp = comp_ctx->curr_func.shuffle1; if (op_flags & DUK__EMIT_FLAG_A_IS_SOURCE) { duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDREG, tmp, a)); } else { /* Output shuffle needed after main operation */ a_out = a; /* The DUK_OP_CSVAR output shuffle assumes shuffle registers are * consecutive. */ DUK_ASSERT((comp_ctx->curr_func.shuffle1 == 0 && comp_ctx->curr_func.shuffle2 == 0) || (comp_ctx->curr_func.shuffle2 == comp_ctx->curr_func.shuffle1 + 1)); if (op == DUK_OP_CSVAR) { /* For CSVAR the limit is one smaller because output shuffle * must be able to express 'a + 1' in BC. */ if (a + 1 > DUK_BC_BC_MAX) { goto error_outofregs; } } } a = tmp; } else { DUK_D(DUK_DPRINT("out of regs: 'a' (reg) needs shuffling but does not fit into BC, a: %ld", (long) a)); goto error_outofregs; } /* Slot B: reg/const support, mapped to bit 0 of opcode. */ if ((b & DUK__CONST_MARKER) != 0) { DUK_ASSERT((op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_B) == 0); DUK_ASSERT((op_flags & DUK__EMIT_FLAG_B_IS_TARGET) == 0); b = b & ~DUK__CONST_MARKER; #if defined(DUK_USE_SHUFFLE_TORTURE) if (0) { #else if (b <= 0xff) { #endif if (op_flags & DUK__EMIT_FLAG_BC_REGCONST) { /* Opcode follows B/C reg/const convention. */ DUK_ASSERT((op & 0x01) == 0); ins |= DUK_ENC_OP_A_B_C(0x01, 0, 0, 0); /* const flag for B */ } else { DUK_D(DUK_DPRINT("B is const, opcode is not B/C reg/const: %x", op_flags)); } } else if (b <= DUK_BC_BC_MAX) { comp_ctx->curr_func.needs_shuffle = 1; tmp = comp_ctx->curr_func.shuffle2; duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDCONST, tmp, b)); b = tmp; } else { DUK_D(DUK_DPRINT("out of regs: 'b' (const) needs shuffling but does not fit into BC, b: %ld", (long) b)); goto error_outofregs; } } else { #if defined(DUK_USE_SHUFFLE_TORTURE) if (b <= 0xff && (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_B)) { #else if (b <= 0xff) { #endif ; } else if (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_B) { if (b > DUK_BC_B_MAX) { /* Note: 0xff != DUK_BC_B_MAX */ DUK_D(DUK_DPRINT("out of regs: 'b' (reg) needs shuffling but shuffle prohibited, b: %ld", (long) b)); goto error_outofregs; } } else if (b <= DUK_BC_BC_MAX) { comp_ctx->curr_func.needs_shuffle = 1; tmp = comp_ctx->curr_func.shuffle2; if (op_flags & DUK__EMIT_FLAG_B_IS_TARGET) { /* Output shuffle needed after main operation */ b_out = b; } if (!(op_flags & DUK__EMIT_FLAG_B_IS_TARGET)) { if (op == DUK_OP_MPUTOBJ || op == DUK_OP_MPUTARR) { /* Special handling for MPUTOBJ/MPUTARR shuffling. * For each, slot B identifies the first register of a range * of registers, so normal shuffling won't work. Instead, * an indirect version of the opcode is used. */ DUK_ASSERT((op_flags & DUK__EMIT_FLAG_B_IS_TARGET) == 0); duk__emit_load_int32_noshuffle(comp_ctx, tmp, b); DUK_ASSERT(DUK_OP_MPUTOBJI == DUK_OP_MPUTOBJ + 1); DUK_ASSERT(DUK_OP_MPUTARRI == DUK_OP_MPUTARR + 1); op_flags++; /* indirect opcode follows direct */ } else { duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDREG, tmp, b)); } } b = tmp; } else { DUK_D(DUK_DPRINT("out of regs: 'b' (reg) needs shuffling but does not fit into BC, b: %ld", (long) b)); goto error_outofregs; } } /* Slot C: reg/const support, mapped to bit 1 of opcode. */ if ((c & DUK__CONST_MARKER) != 0) { DUK_ASSERT((op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_C) == 0); DUK_ASSERT((op_flags & DUK__EMIT_FLAG_C_IS_TARGET) == 0); c = c & ~DUK__CONST_MARKER; #if defined(DUK_USE_SHUFFLE_TORTURE) if (0) { #else if (c <= 0xff) { #endif if (op_flags & DUK__EMIT_FLAG_BC_REGCONST) { /* Opcode follows B/C reg/const convention. */ DUK_ASSERT((op & 0x02) == 0); ins |= DUK_ENC_OP_A_B_C(0x02, 0, 0, 0); /* const flag for C */ } else { DUK_D(DUK_DPRINT("C is const, opcode is not B/C reg/const: %x", op_flags)); } } else if (c <= DUK_BC_BC_MAX) { comp_ctx->curr_func.needs_shuffle = 1; tmp = comp_ctx->curr_func.shuffle3; duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDCONST, tmp, c)); c = tmp; } else { DUK_D(DUK_DPRINT("out of regs: 'c' (const) needs shuffling but does not fit into BC, c: %ld", (long) c)); goto error_outofregs; } } else { #if defined(DUK_USE_SHUFFLE_TORTURE) if (c <= 0xff && (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_C)) { #else if (c <= 0xff) { #endif ; } else if (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_C) { if (c > DUK_BC_C_MAX) { /* Note: 0xff != DUK_BC_C_MAX */ DUK_D(DUK_DPRINT("out of regs: 'c' (reg) needs shuffling but shuffle prohibited, c: %ld", (long) c)); goto error_outofregs; } } else if (c <= DUK_BC_BC_MAX) { comp_ctx->curr_func.needs_shuffle = 1; tmp = comp_ctx->curr_func.shuffle3; if (op_flags & DUK__EMIT_FLAG_C_IS_TARGET) { /* Output shuffle needed after main operation */ c_out = c; } else { duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDREG, tmp, c)); } c = tmp; } else { DUK_D(DUK_DPRINT("out of regs: 'c' (reg) needs shuffling but does not fit into BC, c: %ld", (long) c)); goto error_outofregs; } } /* Main operation */ DUK_ASSERT(a >= DUK_BC_A_MIN); DUK_ASSERT(a <= DUK_BC_A_MAX); DUK_ASSERT(b >= DUK_BC_B_MIN); DUK_ASSERT(b <= DUK_BC_B_MAX); DUK_ASSERT(c >= DUK_BC_C_MIN); DUK_ASSERT(c <= DUK_BC_C_MAX); ins |= DUK_ENC_OP_A_B_C(op_flags & 0xff, a, b, c); duk__emit(comp_ctx, ins); /* NEXTENUM needs a jump slot right after the main instruction. * When the JUMP is taken, output spilling is not needed so this * workaround is possible. The jump slot PC is exceptionally * plumbed through comp_ctx to minimize call sites. */ if (op_flags & DUK__EMIT_FLAG_RESERVE_JUMPSLOT) { comp_ctx->emit_jumpslot_pc = duk__get_current_pc(comp_ctx); duk__emit_abc(comp_ctx, DUK_OP_JUMP, 0); } /* Output shuffling: only one output register is realistically possible. * * (Zero would normally be an OK marker value: if the target register * was zero, it would never be shuffled. But with DUK_USE_SHUFFLE_TORTURE * this is no longer true, so use -1 as a marker instead.) */ if (a_out >= 0) { DUK_ASSERT(b_out < 0); DUK_ASSERT(c_out < 0); duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_STREG, a, a_out)); if (op == DUK_OP_CSVAR) { /* Special handling for CSVAR shuffling. The variable lookup * results in a pair in successive * registers so use two shuffle registers and two output * loads. (In practice this is dead code because temp/const * limit is reached first.) */ duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_STREG, a + 1, a_out + 1)); } } else if (b_out >= 0) { DUK_ASSERT(a_out < 0); DUK_ASSERT(c_out < 0); duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_STREG, b, b_out)); } else if (c_out >= 0) { DUK_ASSERT(b_out < 0); DUK_ASSERT(c_out < 0); duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_STREG, c, c_out)); } return; error_outofregs: DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_REG_LIMIT); DUK_WO_NORETURN(return;); } /* For many of the helpers below it'd be technically correct to add * "no shuffle" flags for parameters passed in as zero. For example, * duk__emit_a_b() should call duk__emit_a_b_c() with C set to 0, and * DUK__EMIT_FLAG_NO_SHUFFLE_C added to op_flags. However, since the * C value is 0, it'll never get shuffled so adding the flag is just * unnecessary additional code. This is unfortunately not true for * "shuffle torture" mode which needs special handling. */ DUK_LOCAL void duk__emit_a_b(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t b) { #if defined(DUK_USE_SHUFFLE_TORTURE) op_flags |= DUK__EMIT_FLAG_NO_SHUFFLE_C; #endif duk__emit_a_b_c(comp_ctx, op_flags, a, b, 0); } DUK_LOCAL void duk__emit_b_c(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t b, duk_regconst_t c) { #if defined(DUK_USE_SHUFFLE_TORTURE) op_flags |= DUK__EMIT_FLAG_NO_SHUFFLE_A; #endif duk__emit_a_b_c(comp_ctx, op_flags, 0, b, c); } #if 0 /* unused */ DUK_LOCAL void duk__emit_a(duk_compiler_ctx *comp_ctx, int op_flags, int a) { #if defined(DUK_USE_SHUFFLE_TORTURE) op_flags |= DUK__EMIT_FLAG_NO_SHUFFLE_B | DUK__EMIT_FLAG_NO_SHUFFLE_C; #endif duk__emit_a_b_c(comp_ctx, op_flags, a, 0, 0); } #endif #if 0 /* unused */ DUK_LOCAL void duk__emit_b(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t b) { #if defined(DUK_USE_SHUFFLE_TORTURE) op_flags |= DUK__EMIT_FLAG_NO_SHUFFLE_A | DUK__EMIT_FLAG_NO_SHUFFLE_C; #endif duk__emit_a_b_c(comp_ctx, op_flags, 0, b, 0); } #endif DUK_LOCAL void duk__emit_a_bc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t bc) { duk_instr_t ins; duk_int_t tmp; /* allow caller to give a const number with the DUK__CONST_MARKER */ DUK_ASSERT(bc != -1); /* Not 'none'. */ bc = bc & (~DUK__CONST_MARKER); DUK_ASSERT_DISABLE((op_flags & 0xff) >= DUK_BC_OP_MIN); /* unsigned */ DUK_ASSERT((op_flags & 0xff) <= DUK_BC_OP_MAX); DUK_ASSERT(bc >= DUK_BC_BC_MIN); DUK_ASSERT(bc <= DUK_BC_BC_MAX); DUK_ASSERT((bc & DUK__CONST_MARKER) == 0); if (bc <= DUK_BC_BC_MAX) { ; } else { /* No BC shuffling now. */ goto error_outofregs; } #if defined(DUK_USE_SHUFFLE_TORTURE) if (a <= DUK_BC_A_MAX && (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_A)) { #else if (a <= DUK_BC_A_MAX) { #endif ins = DUK_ENC_OP_A_BC(op_flags & 0xff, a, bc); duk__emit(comp_ctx, ins); } else if (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_A) { goto error_outofregs; } else if ((op_flags & 0xf0U) == DUK_OP_CALL0) { comp_ctx->curr_func.needs_shuffle = 1; tmp = comp_ctx->curr_func.shuffle1; duk__emit_load_int32_noshuffle(comp_ctx, tmp, a); op_flags |= DUK_BC_CALL_FLAG_INDIRECT; ins = DUK_ENC_OP_A_BC(op_flags & 0xff, tmp, bc); duk__emit(comp_ctx, ins); } else if (a <= DUK_BC_BC_MAX) { comp_ctx->curr_func.needs_shuffle = 1; tmp = comp_ctx->curr_func.shuffle1; ins = DUK_ENC_OP_A_BC(op_flags & 0xff, tmp, bc); if (op_flags & DUK__EMIT_FLAG_A_IS_SOURCE) { duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDREG, tmp, a)); duk__emit(comp_ctx, ins); } else { duk__emit(comp_ctx, ins); duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_STREG, tmp, a)); } } else { goto error_outofregs; } return; error_outofregs: DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_REG_LIMIT); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__emit_bc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op, duk_regconst_t bc) { #if defined(DUK_USE_SHUFFLE_TORTURE) op |= DUK__EMIT_FLAG_NO_SHUFFLE_A; #endif duk__emit_a_bc(comp_ctx, op, 0, bc); } DUK_LOCAL void duk__emit_abc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op, duk_regconst_t abc) { duk_instr_t ins; DUK_ASSERT_DISABLE(op >= DUK_BC_OP_MIN); /* unsigned */ DUK_ASSERT(op <= DUK_BC_OP_MAX); DUK_ASSERT_DISABLE(abc >= DUK_BC_ABC_MIN); /* unsigned */ DUK_ASSERT(abc <= DUK_BC_ABC_MAX); DUK_ASSERT((abc & DUK__CONST_MARKER) == 0); DUK_ASSERT(abc != -1); /* Not 'none'. */ if (abc <= DUK_BC_ABC_MAX) { ; } else { goto error_outofregs; } ins = DUK_ENC_OP_ABC(op, abc); DUK_DDD(DUK_DDDPRINT("duk__emit_abc: 0x%08lx line=%ld pc=%ld op=%ld (%!X) abc=%ld (%!I)", (unsigned long) ins, (long) comp_ctx->curr_token.start_line, (long) duk__get_current_pc(comp_ctx), (long) op, (long) op, (long) abc, (duk_instr_t) ins)); duk__emit(comp_ctx, ins); return; error_outofregs: DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_REG_LIMIT); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__emit_load_int32_raw(duk_compiler_ctx *comp_ctx, duk_regconst_t reg, duk_int32_t val, duk_small_uint_t op_flags) { /* XXX: Shuffling support could be implemented here so that LDINT+LDINTX * would only shuffle once (instead of twice). The current code works * though, and has a smaller compiler footprint. */ if ((val >= (duk_int32_t) DUK_BC_BC_MIN - (duk_int32_t) DUK_BC_LDINT_BIAS) && (val <= (duk_int32_t) DUK_BC_BC_MAX - (duk_int32_t) DUK_BC_LDINT_BIAS)) { DUK_DDD(DUK_DDDPRINT("emit LDINT to reg %ld for %ld", (long) reg, (long) val)); duk__emit_a_bc(comp_ctx, DUK_OP_LDINT | op_flags, reg, (duk_regconst_t) (val + (duk_int32_t) DUK_BC_LDINT_BIAS)); } else { duk_int32_t hi = val >> DUK_BC_LDINTX_SHIFT; duk_int32_t lo = val & ((((duk_int32_t) 1) << DUK_BC_LDINTX_SHIFT) - 1); DUK_ASSERT(lo >= 0); DUK_DDD(DUK_DDDPRINT("emit LDINT+LDINTX to reg %ld for %ld -> hi %ld, lo %ld", (long) reg, (long) val, (long) hi, (long) lo)); duk__emit_a_bc(comp_ctx, DUK_OP_LDINT | op_flags, reg, (duk_regconst_t) (hi + (duk_int32_t) DUK_BC_LDINT_BIAS)); duk__emit_a_bc(comp_ctx, DUK_OP_LDINTX | op_flags, reg, (duk_regconst_t) lo); } } DUK_LOCAL void duk__emit_load_int32(duk_compiler_ctx *comp_ctx, duk_regconst_t reg, duk_int32_t val) { duk__emit_load_int32_raw(comp_ctx, reg, val, 0 /*op_flags*/); } #if defined(DUK_USE_SHUFFLE_TORTURE) /* Used by duk__emit*() calls so that we don't shuffle the loadints that * are needed to handle indirect opcodes. */ DUK_LOCAL void duk__emit_load_int32_noshuffle(duk_compiler_ctx *comp_ctx, duk_regconst_t reg, duk_int32_t val) { duk__emit_load_int32_raw(comp_ctx, reg, val, DUK__EMIT_FLAG_NO_SHUFFLE_A /*op_flags*/); } #else DUK_LOCAL void duk__emit_load_int32_noshuffle(duk_compiler_ctx *comp_ctx, duk_regconst_t reg, duk_int32_t val) { /* When torture not enabled, can just use the same helper because * 'reg' won't get spilled. */ DUK_ASSERT(reg <= DUK_BC_A_MAX); duk__emit_load_int32(comp_ctx, reg, val); } #endif DUK_LOCAL void duk__emit_jump(duk_compiler_ctx *comp_ctx, duk_int_t target_pc) { duk_int_t curr_pc; duk_int_t offset; curr_pc = (duk_int_t) (DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) / sizeof(duk_compiler_instr)); offset = (duk_int_t) target_pc - (duk_int_t) curr_pc - 1; DUK_ASSERT(offset + DUK_BC_JUMP_BIAS >= DUK_BC_ABC_MIN); DUK_ASSERT(offset + DUK_BC_JUMP_BIAS <= DUK_BC_ABC_MAX); duk__emit_abc(comp_ctx, DUK_OP_JUMP, (duk_regconst_t) (offset + DUK_BC_JUMP_BIAS)); } DUK_LOCAL duk_int_t duk__emit_jump_empty(duk_compiler_ctx *comp_ctx) { duk_int_t ret; ret = duk__get_current_pc(comp_ctx); /* useful for patching jumps later */ duk__emit_op_only(comp_ctx, DUK_OP_JUMP); return ret; } /* Insert an empty jump in the middle of code emitted earlier. This is * currently needed for compiling for-in. */ DUK_LOCAL void duk__insert_jump_entry(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc) { #if defined(DUK_USE_PC2LINE) duk_int_t line; #endif duk_compiler_instr *instr; duk_size_t offset; DUK_ASSERT(jump_pc >= 0); offset = (duk_size_t) jump_pc * sizeof(duk_compiler_instr); instr = (duk_compiler_instr *) (void *) DUK_BW_INSERT_ENSURE_AREA(comp_ctx->thr, &comp_ctx->curr_func.bw_code, offset, sizeof(duk_compiler_instr)); #if defined(DUK_USE_PC2LINE) line = comp_ctx->curr_token.start_line; /* approximation, close enough */ #endif instr->ins = DUK_ENC_OP_ABC(DUK_OP_JUMP, 0); #if defined(DUK_USE_PC2LINE) instr->line = (duk_uint32_t) line; #endif DUK_BW_ADD_PTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code, sizeof(duk_compiler_instr)); if (DUK_UNLIKELY(DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) > DUK_USE_ESBC_MAX_BYTES)) { goto fail_bc_limit; } return; fail_bc_limit: DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_BYTECODE_LIMIT); DUK_WO_NORETURN(return;); } /* Does not assume that jump_pc contains a DUK_OP_JUMP previously; this is intentional * to allow e.g. an INVALID opcode be overwritten with a JUMP (label management uses this). */ DUK_LOCAL void duk__patch_jump(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc, duk_int_t target_pc) { duk_compiler_instr *instr; duk_int_t offset; /* allow negative PCs, behave as a no-op */ if (jump_pc < 0) { DUK_DDD(DUK_DDDPRINT("duk__patch_jump(): nop call, jump_pc=%ld (<0), target_pc=%ld", (long) jump_pc, (long) target_pc)); return; } DUK_ASSERT(jump_pc >= 0); /* XXX: range assert */ instr = duk__get_instr_ptr(comp_ctx, jump_pc); DUK_ASSERT(instr != NULL); /* XXX: range assert */ offset = target_pc - jump_pc - 1; instr->ins = DUK_ENC_OP_ABC(DUK_OP_JUMP, offset + DUK_BC_JUMP_BIAS); DUK_DDD(DUK_DDDPRINT("duk__patch_jump(): jump_pc=%ld, target_pc=%ld, offset=%ld", (long) jump_pc, (long) target_pc, (long) offset)); } DUK_LOCAL void duk__patch_jump_here(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc) { duk__patch_jump(comp_ctx, jump_pc, duk__get_current_pc(comp_ctx)); } DUK_LOCAL void duk__patch_trycatch(duk_compiler_ctx *comp_ctx, duk_int_t ldconst_pc, duk_int_t trycatch_pc, duk_regconst_t reg_catch, duk_regconst_t const_varname, duk_small_uint_t flags) { duk_compiler_instr *instr; DUK_ASSERT(DUK__ISREG(reg_catch)); instr = duk__get_instr_ptr(comp_ctx, ldconst_pc); DUK_ASSERT(DUK_DEC_OP(instr->ins) == DUK_OP_LDCONST); DUK_ASSERT(instr != NULL); if (const_varname & DUK__CONST_MARKER) { /* Have a catch variable. */ const_varname = const_varname & (~DUK__CONST_MARKER); if (reg_catch > DUK_BC_BC_MAX || const_varname > DUK_BC_BC_MAX) { /* Catch attempts to use out-of-range reg/const. Without this * check Duktape 0.12.0 could generate invalid code which caused * an assert failure on execution. This error is triggered e.g. * for functions with a lot of constants and a try-catch statement. * Shuffling or opcode semantics change is needed to fix the issue. * See: test-bug-trycatch-many-constants.js. */ DUK_D(DUK_DPRINT("failed to patch trycatch: flags=%ld, reg_catch=%ld, const_varname=%ld (0x%08lx)", (long) flags, (long) reg_catch, (long) const_varname, (long) const_varname)); DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_REG_LIMIT); DUK_WO_NORETURN(return;); } instr->ins |= DUK_ENC_OP_A_BC(0, 0, const_varname); } else { /* No catch variable, e.g. a try-finally; replace LDCONST with * NOP to avoid a bogus LDCONST. */ instr->ins = DUK_ENC_OP(DUK_OP_NOP); } instr = duk__get_instr_ptr(comp_ctx, trycatch_pc); DUK_ASSERT(instr != NULL); DUK_ASSERT_DISABLE(flags >= DUK_BC_A_MIN); DUK_ASSERT(flags <= DUK_BC_A_MAX); instr->ins = DUK_ENC_OP_A_BC(DUK_OP_TRYCATCH, flags, reg_catch); } DUK_LOCAL void duk__emit_if_false_skip(duk_compiler_ctx *comp_ctx, duk_regconst_t regconst) { duk_small_uint_t op; op = DUK__ISREG(regconst) ? DUK_OP_IFFALSE_R : DUK_OP_IFFALSE_C; duk__emit_bc(comp_ctx, op, regconst); /* helper will remove const flag */ } DUK_LOCAL void duk__emit_if_true_skip(duk_compiler_ctx *comp_ctx, duk_regconst_t regconst) { duk_small_uint_t op; op = DUK__ISREG(regconst) ? DUK_OP_IFTRUE_R : DUK_OP_IFTRUE_C; duk__emit_bc(comp_ctx, op, regconst); /* helper will remove const flag */ } DUK_LOCAL void duk__emit_invalid(duk_compiler_ctx *comp_ctx) { duk__emit_op_only(comp_ctx, DUK_OP_INVALID); } /* * Peephole optimizer for finished bytecode. * * Does not remove opcodes; currently only straightens out unconditional * jump chains which are generated by several control structures. */ DUK_LOCAL void duk__peephole_optimize_bytecode(duk_compiler_ctx *comp_ctx) { duk_compiler_instr *bc; duk_small_uint_t iter; duk_int_t i, n; duk_int_t count_opt; bc = (duk_compiler_instr *) (void *) DUK_BW_GET_BASEPTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code); #if defined(DUK_USE_BUFLEN16) /* No need to assert, buffer size maximum is 0xffff. */ #else DUK_ASSERT((duk_size_t) DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) / sizeof(duk_compiler_instr) <= (duk_size_t) DUK_INT_MAX); /* bytecode limits */ #endif n = (duk_int_t) (DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) / sizeof(duk_compiler_instr)); for (iter = 0; iter < DUK_COMPILER_PEEPHOLE_MAXITER; iter++) { count_opt = 0; for (i = 0; i < n; i++) { duk_instr_t ins; duk_int_t target_pc1; duk_int_t target_pc2; ins = bc[i].ins; if (DUK_DEC_OP(ins) != DUK_OP_JUMP) { continue; } target_pc1 = i + 1 + (duk_int_t) DUK_DEC_ABC(ins) - (duk_int_t) DUK_BC_JUMP_BIAS; DUK_DDD(DUK_DDDPRINT("consider jump at pc %ld; target_pc=%ld", (long) i, (long) target_pc1)); DUK_ASSERT(target_pc1 >= 0); DUK_ASSERT(target_pc1 < n); /* Note: if target_pc1 == i, we'll optimize a jump to itself. * This does not need to be checked for explicitly; the case * is rare and max iter breaks us out. */ ins = bc[target_pc1].ins; if (DUK_DEC_OP(ins) != DUK_OP_JUMP) { continue; } target_pc2 = target_pc1 + 1 + (duk_int_t) DUK_DEC_ABC(ins) - (duk_int_t) DUK_BC_JUMP_BIAS; DUK_DDD(DUK_DDDPRINT("optimizing jump at pc %ld; old target is %ld -> new target is %ld", (long) i, (long) target_pc1, (long) target_pc2)); bc[i].ins = DUK_ENC_OP_ABC(DUK_OP_JUMP, target_pc2 - (i + 1) + DUK_BC_JUMP_BIAS); count_opt++; } DUK_DD(DUK_DDPRINT("optimized %ld jumps on peephole round %ld", (long) count_opt, (long) (iter + 1))); if (count_opt == 0) { break; } } } /* * Intermediate value helpers */ /* Flags for intermediate value coercions. A flag for using a forced reg * is not needed, the forced_reg argument suffices and generates better * code (it is checked as it is used). */ /* XXX: DUK__IVAL_FLAG_REQUIRE_SHORT is passed but not currently implemented * by ispec/ivalue operations. */ #define DUK__IVAL_FLAG_ALLOW_CONST (1 << 0) /* allow a constant to be returned */ #define DUK__IVAL_FLAG_REQUIRE_TEMP (1 << 1) /* require a (mutable) temporary as a result (or a const if allowed) */ #define DUK__IVAL_FLAG_REQUIRE_SHORT (1 << 2) /* require a short (8-bit) reg/const which fits into bytecode B/C slot */ /* XXX: some code might benefit from DUK__SETTEMP_IFTEMP(thr,x) */ #if 0 /* enable manually for dumping */ #define DUK__DUMP_ISPEC(compctx,ispec) do { duk__dump_ispec((compctx), (ispec)); } while (0) #define DUK__DUMP_IVALUE(compctx,ivalue) do { duk__dump_ivalue((compctx), (ivalue)); } while (0) DUK_LOCAL void duk__dump_ispec(duk_compiler_ctx *comp_ctx, duk_ispec *x) { DUK_D(DUK_DPRINT("ispec dump: t=%ld regconst=0x%08lx, valstack_idx=%ld, value=%!T", (long) x->t, (unsigned long) x->regconst, (long) x->valstack_idx, duk_get_tval(comp_ctx->thr, x->valstack_idx))); } DUK_LOCAL void duk__dump_ivalue(duk_compiler_ctx *comp_ctx, duk_ivalue *x) { DUK_D(DUK_DPRINT("ivalue dump: t=%ld op=%ld " "x1={t=%ld regconst=0x%08lx valstack_idx=%ld value=%!T} " "x2={t=%ld regconst=0x%08lx valstack_idx=%ld value=%!T}", (long) x->t, (long) x->op, (long) x->x1.t, (unsigned long) x->x1.regconst, (long) x->x1.valstack_idx, duk_get_tval(comp_ctx->thr, x->x1.valstack_idx), (long) x->x2.t, (unsigned long) x->x2.regconst, (long) x->x2.valstack_idx, duk_get_tval(comp_ctx->thr, x->x2.valstack_idx))); } #else #define DUK__DUMP_ISPEC(comp_ctx,x) do {} while (0) #define DUK__DUMP_IVALUE(comp_ctx,x) do {} while (0) #endif DUK_LOCAL void duk__ivalue_regconst(duk_ivalue *x, duk_regconst_t regconst) { x->t = DUK_IVAL_PLAIN; x->x1.t = DUK_ISPEC_REGCONST; x->x1.regconst = regconst; } DUK_LOCAL void duk__ivalue_plain_fromstack(duk_compiler_ctx *comp_ctx, duk_ivalue *x) { x->t = DUK_IVAL_PLAIN; x->x1.t = DUK_ISPEC_VALUE; duk_replace(comp_ctx->thr, x->x1.valstack_idx); } DUK_LOCAL void duk__ivalue_var_fromstack(duk_compiler_ctx *comp_ctx, duk_ivalue *x) { x->t = DUK_IVAL_VAR; x->x1.t = DUK_ISPEC_VALUE; duk_replace(comp_ctx->thr, x->x1.valstack_idx); } DUK_LOCAL_DECL void duk__ivalue_var_hstring(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_hstring *h) { DUK_ASSERT(h != NULL); duk_push_hstring(comp_ctx->thr, h); duk__ivalue_var_fromstack(comp_ctx, x); } DUK_LOCAL void duk__copy_ispec(duk_compiler_ctx *comp_ctx, duk_ispec *src, duk_ispec *dst) { dst->t = src->t; dst->regconst = src->regconst; duk_copy(comp_ctx->thr, src->valstack_idx, dst->valstack_idx); } DUK_LOCAL void duk__copy_ivalue(duk_compiler_ctx *comp_ctx, duk_ivalue *src, duk_ivalue *dst) { dst->t = src->t; dst->op = src->op; dst->x1.t = src->x1.t; dst->x1.regconst = src->x1.regconst; dst->x2.t = src->x2.t; dst->x2.regconst = src->x2.regconst; duk_copy(comp_ctx->thr, src->x1.valstack_idx, dst->x1.valstack_idx); duk_copy(comp_ctx->thr, src->x2.valstack_idx, dst->x2.valstack_idx); } DUK_LOCAL duk_regconst_t duk__alloctemps(duk_compiler_ctx *comp_ctx, duk_small_int_t num) { duk_regconst_t res; res = comp_ctx->curr_func.temp_next; comp_ctx->curr_func.temp_next += num; if (comp_ctx->curr_func.temp_next > DUK__MAX_TEMPS) { /* == DUK__MAX_TEMPS is OK */ DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_TEMP_LIMIT); DUK_WO_NORETURN(return 0;); } /* maintain highest 'used' temporary, needed to figure out nregs of function */ if (comp_ctx->curr_func.temp_next > comp_ctx->curr_func.temp_max) { comp_ctx->curr_func.temp_max = comp_ctx->curr_func.temp_next; } return res; } DUK_LOCAL duk_regconst_t duk__alloctemp(duk_compiler_ctx *comp_ctx) { return duk__alloctemps(comp_ctx, 1); } DUK_LOCAL void duk__settemp_checkmax(duk_compiler_ctx *comp_ctx, duk_regconst_t temp_next) { comp_ctx->curr_func.temp_next = temp_next; if (temp_next > comp_ctx->curr_func.temp_max) { comp_ctx->curr_func.temp_max = temp_next; } } /* get const for value at valstack top */ DUK_LOCAL duk_regconst_t duk__getconst(duk_compiler_ctx *comp_ctx) { duk_hthread *thr = comp_ctx->thr; duk_compiler_func *f = &comp_ctx->curr_func; duk_tval *tv1; duk_int_t i, n, n_check; n = (duk_int_t) duk_get_length(thr, f->consts_idx); tv1 = DUK_GET_TVAL_NEGIDX(thr, -1); DUK_ASSERT(tv1 != NULL); #if defined(DUK_USE_FASTINT) /* Explicit check for fastint downgrade. */ DUK_TVAL_CHKFAST_INPLACE_SLOW(tv1); #endif /* Sanity workaround for handling functions with a large number of * constants at least somewhat reasonably. Otherwise checking whether * we already have the constant would grow very slow (as it is O(N^2)). */ n_check = (n > DUK__GETCONST_MAX_CONSTS_CHECK ? DUK__GETCONST_MAX_CONSTS_CHECK : n); for (i = 0; i < n_check; i++) { duk_tval *tv2 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, f->h_consts, i); /* Strict equality is NOT enough, because we cannot use the same * constant for e.g. +0 and -0. */ if (duk_js_samevalue(tv1, tv2)) { DUK_DDD(DUK_DDDPRINT("reused existing constant for %!T -> const index %ld", (duk_tval *) tv1, (long) i)); duk_pop(thr); return (duk_regconst_t) i | (duk_regconst_t) DUK__CONST_MARKER; } } if (n > DUK__MAX_CONSTS) { DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_CONST_LIMIT); DUK_WO_NORETURN(return 0;); } DUK_DDD(DUK_DDDPRINT("allocating new constant for %!T -> const index %ld", (duk_tval *) tv1, (long) n)); (void) duk_put_prop_index(thr, f->consts_idx, (duk_uarridx_t) n); /* invalidates tv1, tv2 */ return (duk_regconst_t) n | (duk_regconst_t) DUK__CONST_MARKER; } DUK_LOCAL duk_bool_t duk__const_needs_refcount(duk_compiler_ctx *comp_ctx, duk_regconst_t rc) { #if defined(DUK_USE_REFERENCE_COUNTING) duk_compiler_func *f = &comp_ctx->curr_func; duk_bool_t ret; DUK_ASSERT((rc & DUK__CONST_MARKER) == 0); /* caller removes const marker */ (void) duk_get_prop_index(comp_ctx->thr, f->consts_idx, (duk_uarridx_t) rc); ret = !duk_is_number(comp_ctx->thr, -1); /* now only number/string, so conservative check */ duk_pop(comp_ctx->thr); return ret; #else DUK_UNREF(comp_ctx); DUK_UNREF(rc); DUK_ASSERT((rc & DUK__CONST_MARKER) == 0); /* caller removes const marker */ return 0; #endif } /* Get the value represented by an duk_ispec to a register or constant. * The caller can control the result by indicating whether or not: * * (1) a constant is allowed (sometimes the caller needs the result to * be in a register) * * (2) a temporary register is required (usually when caller requires * the register to be safely mutable; normally either a bound * register or a temporary register are both OK) * * (3) a forced register target needs to be used * * Bytecode may be emitted to generate the necessary value. The return * value is either a register or a constant. */ DUK_LOCAL duk_regconst_t duk__ispec_toregconst_raw(duk_compiler_ctx *comp_ctx, duk_ispec *x, duk_regconst_t forced_reg, duk_small_uint_t flags) { duk_hthread *thr = comp_ctx->thr; DUK_DDD(DUK_DDDPRINT("duk__ispec_toregconst_raw(): x={%ld:%ld:%!T}, " "forced_reg=%ld, flags 0x%08lx: allow_const=%ld require_temp=%ld require_short=%ld", (long) x->t, (long) x->regconst, (duk_tval *) duk_get_tval(thr, x->valstack_idx), (long) forced_reg, (unsigned long) flags, (long) ((flags & DUK__IVAL_FLAG_ALLOW_CONST) ? 1 : 0), (long) ((flags & DUK__IVAL_FLAG_REQUIRE_TEMP) ? 1 : 0), (long) ((flags & DUK__IVAL_FLAG_REQUIRE_SHORT) ? 1 : 0))); switch (x->t) { case DUK_ISPEC_VALUE: { duk_tval *tv; tv = DUK_GET_TVAL_POSIDX(thr, x->valstack_idx); DUK_ASSERT(tv != NULL); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNDEFINED: { /* Note: although there is no 'undefined' literal, undefined * values can occur during compilation as a result of e.g. * the 'void' operator. */ duk_regconst_t dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx)); duk__emit_bc(comp_ctx, DUK_OP_LDUNDEF, dest); return dest; } case DUK_TAG_NULL: { duk_regconst_t dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx)); duk__emit_bc(comp_ctx, DUK_OP_LDNULL, dest); return dest; } case DUK_TAG_BOOLEAN: { duk_regconst_t dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx)); duk__emit_bc(comp_ctx, (DUK_TVAL_GET_BOOLEAN(tv) ? DUK_OP_LDTRUE : DUK_OP_LDFALSE), dest); return dest; } case DUK_TAG_POINTER: { DUK_UNREACHABLE(); break; } case DUK_TAG_STRING: { duk_hstring *h; duk_regconst_t dest; duk_regconst_t constidx; h = DUK_TVAL_GET_STRING(tv); DUK_UNREF(h); DUK_ASSERT(h != NULL); #if 0 /* XXX: to be implemented? */ /* Use special opcodes to load short strings */ if (DUK_HSTRING_GET_BYTELEN(h) <= 2) { /* Encode into a single opcode (18 bits can encode 1-2 bytes + length indicator) */ } else if (DUK_HSTRING_GET_BYTELEN(h) <= 6) { /* Encode into a double constant (53 bits can encode 6*8 = 48 bits + 3-bit length */ } #endif duk_dup(thr, x->valstack_idx); constidx = duk__getconst(comp_ctx); if (flags & DUK__IVAL_FLAG_ALLOW_CONST) { return constidx; } dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx)); duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, dest, constidx); return dest; } case DUK_TAG_OBJECT: { DUK_UNREACHABLE(); break; } case DUK_TAG_BUFFER: { DUK_UNREACHABLE(); break; } case DUK_TAG_LIGHTFUNC: { DUK_UNREACHABLE(); break; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: { /* number */ duk_regconst_t dest; duk_regconst_t constidx; duk_double_t dval; duk_int32_t ival; DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); dval = DUK_TVAL_GET_NUMBER(tv); if (!(flags & DUK__IVAL_FLAG_ALLOW_CONST)) { /* A number can be loaded either through a constant, using * LDINT, or using LDINT+LDINTX. LDINT is always a size win, * LDINT+LDINTX is not if the constant is used multiple times. * Currently always prefer LDINT+LDINTX over a double constant. */ if (duk_is_whole_get_int32_nonegzero(dval, &ival)) { dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx)); duk__emit_load_int32(comp_ctx, dest, ival); return dest; } } duk_dup(thr, x->valstack_idx); constidx = duk__getconst(comp_ctx); if (flags & DUK__IVAL_FLAG_ALLOW_CONST) { return constidx; } else { dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx)); duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, dest, constidx); return dest; } } } /* end switch */ goto fail_internal; /* never here */ } case DUK_ISPEC_REGCONST: { if (forced_reg >= 0) { if (DUK__ISCONST(x->regconst)) { duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, forced_reg, x->regconst); } else if (x->regconst != forced_reg) { duk__emit_a_bc(comp_ctx, DUK_OP_LDREG, forced_reg, x->regconst); } else { ; /* already in correct reg */ } return forced_reg; } DUK_ASSERT(forced_reg < 0); if (DUK__ISCONST(x->regconst)) { if (!(flags & DUK__IVAL_FLAG_ALLOW_CONST)) { duk_regconst_t dest = DUK__ALLOCTEMP(comp_ctx); duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, dest, x->regconst); return dest; } return x->regconst; } DUK_ASSERT(forced_reg < 0 && !DUK__ISCONST(x->regconst)); if ((flags & DUK__IVAL_FLAG_REQUIRE_TEMP) && !DUK__ISREG_TEMP(comp_ctx, x->regconst)) { duk_regconst_t dest = DUK__ALLOCTEMP(comp_ctx); duk__emit_a_bc(comp_ctx, DUK_OP_LDREG, dest, x->regconst); return dest; } return x->regconst; } default: { break; /* never here */ } } fail_internal: DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return 0;); } DUK_LOCAL void duk__ispec_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ispec *x, duk_regconst_t forced_reg) { DUK_ASSERT(forced_reg >= 0); (void) duk__ispec_toregconst_raw(comp_ctx, x, forced_reg, 0 /*flags*/); } /* Coerce an duk_ivalue to a 'plain' value by generating the necessary * arithmetic operations, property access, or variable access bytecode. * The duk_ivalue argument ('x') is converted into a plain value as a * side effect. */ DUK_LOCAL void duk__ivalue_toplain_raw(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_regconst_t forced_reg) { duk_hthread *thr = comp_ctx->thr; DUK_DDD(DUK_DDDPRINT("duk__ivalue_toplain_raw(): x={t=%ld,op=%ld,x1={%ld:%ld:%!T},x2={%ld:%ld:%!T}}, " "forced_reg=%ld", (long) x->t, (long) x->op, (long) x->x1.t, (long) x->x1.regconst, (duk_tval *) duk_get_tval(thr, x->x1.valstack_idx), (long) x->x2.t, (long) x->x2.regconst, (duk_tval *) duk_get_tval(thr, x->x2.valstack_idx), (long) forced_reg)); switch (x->t) { case DUK_IVAL_PLAIN: { return; } /* XXX: support unary arithmetic ivalues (useful?) */ case DUK_IVAL_ARITH: { duk_regconst_t arg1; duk_regconst_t arg2; duk_regconst_t dest; duk_tval *tv1; duk_tval *tv2; DUK_DDD(DUK_DDDPRINT("arith to plain conversion")); /* inline arithmetic check for constant values */ /* XXX: use the exactly same arithmetic function here as in executor */ if (x->x1.t == DUK_ISPEC_VALUE && x->x2.t == DUK_ISPEC_VALUE && x->t == DUK_IVAL_ARITH) { tv1 = DUK_GET_TVAL_POSIDX(thr, x->x1.valstack_idx); tv2 = DUK_GET_TVAL_POSIDX(thr, x->x2.valstack_idx); DUK_ASSERT(tv1 != NULL); DUK_ASSERT(tv2 != NULL); DUK_DDD(DUK_DDDPRINT("arith: tv1=%!T, tv2=%!T", (duk_tval *) tv1, (duk_tval *) tv2)); if (DUK_TVAL_IS_NUMBER(tv1) && DUK_TVAL_IS_NUMBER(tv2)) { duk_double_t d1 = DUK_TVAL_GET_NUMBER(tv1); duk_double_t d2 = DUK_TVAL_GET_NUMBER(tv2); duk_double_t d3; duk_bool_t accept_fold = 1; DUK_DDD(DUK_DDDPRINT("arith inline check: d1=%lf, d2=%lf, op=%ld", (double) d1, (double) d2, (long) x->op)); switch (x->op) { case DUK_OP_ADD: { d3 = d1 + d2; break; } case DUK_OP_SUB: { d3 = d1 - d2; break; } case DUK_OP_MUL: { d3 = d1 * d2; break; } case DUK_OP_DIV: { /* Division-by-zero is undefined * behavior, so rely on a helper. */ d3 = duk_double_div(d1, d2); break; } case DUK_OP_EXP: { d3 = (duk_double_t) duk_js_arith_pow((double) d1, (double) d2); break; } default: { d3 = 0.0; /* Won't be used, but silence MSVC /W4 warning. */ accept_fold = 0; break; } } if (accept_fold) { duk_double_union du; du.d = d3; DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du); d3 = du.d; x->t = DUK_IVAL_PLAIN; DUK_ASSERT(x->x1.t == DUK_ISPEC_VALUE); DUK_TVAL_SET_NUMBER(tv1, d3); /* old value is number: no refcount */ return; } } else if (x->op == DUK_OP_ADD && DUK_TVAL_IS_STRING(tv1) && DUK_TVAL_IS_STRING(tv2)) { /* Inline string concatenation. No need to check for * symbols, as all inputs are valid ECMAScript strings. */ duk_dup(thr, x->x1.valstack_idx); duk_dup(thr, x->x2.valstack_idx); duk_concat(thr, 2); duk_replace(thr, x->x1.valstack_idx); x->t = DUK_IVAL_PLAIN; DUK_ASSERT(x->x1.t == DUK_ISPEC_VALUE); return; } } arg1 = duk__ispec_toregconst_raw(comp_ctx, &x->x1, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_SHORT /*flags*/); arg2 = duk__ispec_toregconst_raw(comp_ctx, &x->x2, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_SHORT /*flags*/); /* If forced reg, use it as destination. Otherwise try to * use either coerced ispec if it is a temporary. */ if (forced_reg >= 0) { dest = forced_reg; } else if (DUK__ISREG_TEMP(comp_ctx, arg1)) { dest = arg1; } else if (DUK__ISREG_TEMP(comp_ctx, arg2)) { dest = arg2; } else { dest = DUK__ALLOCTEMP(comp_ctx); } DUK_ASSERT(DUK__ISREG(dest)); duk__emit_a_b_c(comp_ctx, x->op | DUK__EMIT_FLAG_BC_REGCONST, dest, arg1, arg2); duk__ivalue_regconst(x, dest); return; } case DUK_IVAL_PROP: { /* XXX: very similar to DUK_IVAL_ARITH - merge? */ duk_regconst_t arg1; duk_regconst_t arg2; duk_regconst_t dest; /* Need a short reg/const, does not have to be a mutable temp. */ arg1 = duk__ispec_toregconst_raw(comp_ctx, &x->x1, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_SHORT /*flags*/); arg2 = duk__ispec_toregconst_raw(comp_ctx, &x->x2, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_SHORT /*flags*/); /* Pick a destination register. If either base value or key * happens to be a temp value, reuse it as the destination. * * XXX: The temp must be a "mutable" one, i.e. such that no * other expression is using it anymore. Here this should be * the case because the value of a property access expression * is neither the base nor the key, but the lookup result. */ if (forced_reg >= 0) { dest = forced_reg; } else if (DUK__ISREG_TEMP(comp_ctx, arg1)) { dest = arg1; } else if (DUK__ISREG_TEMP(comp_ctx, arg2)) { dest = arg2; } else { dest = DUK__ALLOCTEMP(comp_ctx); } duk__emit_a_b_c(comp_ctx, DUK_OP_GETPROP | DUK__EMIT_FLAG_BC_REGCONST, dest, arg1, arg2); duk__ivalue_regconst(x, dest); return; } case DUK_IVAL_VAR: { /* x1 must be a string */ duk_regconst_t dest; duk_regconst_t reg_varbind; duk_regconst_t rc_varname; DUK_ASSERT(x->x1.t == DUK_ISPEC_VALUE); duk_dup(thr, x->x1.valstack_idx); if (duk__lookup_lhs(comp_ctx, ®_varbind, &rc_varname)) { duk__ivalue_regconst(x, reg_varbind); } else { dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx)); duk__emit_a_bc(comp_ctx, DUK_OP_GETVAR, dest, rc_varname); duk__ivalue_regconst(x, dest); } return; } case DUK_IVAL_NONE: default: { DUK_D(DUK_DPRINT("invalid ivalue type: %ld", (long) x->t)); break; } } DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return;); } /* evaluate to plain value, no forced register (temp/bound reg both ok) */ DUK_LOCAL void duk__ivalue_toplain(duk_compiler_ctx *comp_ctx, duk_ivalue *x) { duk__ivalue_toplain_raw(comp_ctx, x, -1 /*forced_reg*/); } /* evaluate to final form (e.g. coerce GETPROP to code), throw away temp */ DUK_LOCAL void duk__ivalue_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *x) { duk_regconst_t temp; /* If duk__ivalue_toplain_raw() allocates a temp, forget it and * restore next temp state. */ temp = DUK__GETTEMP(comp_ctx); duk__ivalue_toplain_raw(comp_ctx, x, -1 /*forced_reg*/); DUK__SETTEMP(comp_ctx, temp); } /* Coerce an duk_ivalue to a register or constant; result register may * be a temp or a bound register. * * The duk_ivalue argument ('x') is converted into a regconst as a * side effect. */ DUK_LOCAL duk_regconst_t duk__ivalue_toregconst_raw(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_regconst_t forced_reg, duk_small_uint_t flags) { duk_hthread *thr = comp_ctx->thr; duk_regconst_t reg; DUK_UNREF(thr); DUK_DDD(DUK_DDDPRINT("duk__ivalue_toregconst_raw(): x={t=%ld,op=%ld,x1={%ld:%ld:%!T},x2={%ld:%ld:%!T}}, " "forced_reg=%ld, flags 0x%08lx: allow_const=%ld require_temp=%ld require_short=%ld", (long) x->t, (long) x->op, (long) x->x1.t, (long) x->x1.regconst, (duk_tval *) duk_get_tval(thr, x->x1.valstack_idx), (long) x->x2.t, (long) x->x2.regconst, (duk_tval *) duk_get_tval(thr, x->x2.valstack_idx), (long) forced_reg, (unsigned long) flags, (long) ((flags & DUK__IVAL_FLAG_ALLOW_CONST) ? 1 : 0), (long) ((flags & DUK__IVAL_FLAG_REQUIRE_TEMP) ? 1 : 0), (long) ((flags & DUK__IVAL_FLAG_REQUIRE_SHORT) ? 1 : 0))); /* first coerce to a plain value */ duk__ivalue_toplain_raw(comp_ctx, x, forced_reg); DUK_ASSERT(x->t == DUK_IVAL_PLAIN); /* then to a register */ reg = duk__ispec_toregconst_raw(comp_ctx, &x->x1, forced_reg, flags); duk__ivalue_regconst(x, reg); return reg; } DUK_LOCAL duk_regconst_t duk__ivalue_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *x) { return duk__ivalue_toregconst_raw(comp_ctx, x, -1, 0 /*flags*/); } #if 0 /* unused */ DUK_LOCAL duk_regconst_t duk__ivalue_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *x) { return duk__ivalue_toregconst_raw(comp_ctx, x, -1, DUK__IVAL_FLAG_REQUIRE_TEMP /*flags*/); } #endif DUK_LOCAL void duk__ivalue_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_int_t forced_reg) { DUK_ASSERT(forced_reg >= 0); (void) duk__ivalue_toregconst_raw(comp_ctx, x, forced_reg, 0 /*flags*/); } DUK_LOCAL duk_regconst_t duk__ivalue_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *x) { return duk__ivalue_toregconst_raw(comp_ctx, x, -1, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/); } DUK_LOCAL duk_regconst_t duk__ivalue_totempconst(duk_compiler_ctx *comp_ctx, duk_ivalue *x) { return duk__ivalue_toregconst_raw(comp_ctx, x, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_TEMP /*flags*/); } /* The issues below can be solved with better flags */ /* XXX: many operations actually want toforcedtemp() -- brand new temp? */ /* XXX: need a toplain_ignore() which will only coerce a value to a temp * register if it might have a side effect. Side-effect free values do not * need to be coerced. */ /* * Identifier handling */ DUK_LOCAL duk_regconst_t duk__lookup_active_register_binding(duk_compiler_ctx *comp_ctx) { duk_hthread *thr = comp_ctx->thr; duk_hstring *h_varname; duk_regconst_t ret; DUK_DDD(DUK_DDDPRINT("resolving identifier reference to '%!T'", (duk_tval *) duk_get_tval(thr, -1))); /* * Special name handling */ h_varname = duk_known_hstring(thr, -1); if (h_varname == DUK_HTHREAD_STRING_LC_ARGUMENTS(thr)) { DUK_DDD(DUK_DDDPRINT("flagging function as accessing 'arguments'")); comp_ctx->curr_func.id_access_arguments = 1; } /* * Inside one or more 'with' statements fall back to slow path always. * (See e.g. test-stmt-with.js.) */ if (comp_ctx->curr_func.with_depth > 0) { DUK_DDD(DUK_DDDPRINT("identifier lookup inside a 'with' -> fall back to slow path")); goto slow_path_own; } /* * Any catch bindings ("catch (e)") also affect identifier binding. * * Currently, the varmap is modified for the duration of the catch * clause to ensure any identifier accesses with the catch variable * name will use slow path. */ duk_get_prop(thr, comp_ctx->curr_func.varmap_idx); if (duk_is_number(thr, -1)) { ret = duk_to_int(thr, -1); duk_pop(thr); } else { duk_pop(thr); if (comp_ctx->curr_func.catch_depth > 0 || comp_ctx->curr_func.with_depth > 0) { DUK_DDD(DUK_DDDPRINT("slow path access from inside a try-catch or with needs _Varmap")); goto slow_path_own; } else { /* In this case we're doing a variable lookup that doesn't * match our own variables, so _Varmap won't be needed at * run time. */ DUK_DDD(DUK_DDDPRINT("slow path access outside of try-catch and with, no need for _Varmap")); goto slow_path_notown; } } DUK_DDD(DUK_DDDPRINT("identifier lookup -> reg %ld", (long) ret)); return ret; slow_path_notown: DUK_DDD(DUK_DDDPRINT("identifier lookup -> slow path, not own variable")); comp_ctx->curr_func.id_access_slow = 1; return (duk_regconst_t) -1; slow_path_own: DUK_DDD(DUK_DDDPRINT("identifier lookup -> slow path, may be own variable")); comp_ctx->curr_func.id_access_slow = 1; comp_ctx->curr_func.id_access_slow_own = 1; return (duk_regconst_t) -1; } /* Lookup an identifier name in the current varmap, indicating whether the * identifier is register-bound and if not, allocating a constant for the * identifier name. Returns 1 if register-bound, 0 otherwise. Caller can * also check (out_reg_varbind >= 0) to check whether or not identifier is * register bound. The caller must NOT use out_rc_varname at all unless * return code is 0 or out_reg_varbind is < 0; this is becuase out_rc_varname * is unsigned and doesn't have a "unused" / none value. */ DUK_LOCAL duk_bool_t duk__lookup_lhs(duk_compiler_ctx *comp_ctx, duk_regconst_t *out_reg_varbind, duk_regconst_t *out_rc_varname) { duk_hthread *thr = comp_ctx->thr; duk_regconst_t reg_varbind; duk_regconst_t rc_varname; /* [ ... varname ] */ duk_dup_top(thr); reg_varbind = duk__lookup_active_register_binding(comp_ctx); if (reg_varbind >= 0) { *out_reg_varbind = reg_varbind; *out_rc_varname = 0; /* duk_regconst_t is unsigned, so use 0 as dummy value (ignored by caller) */ duk_pop(thr); return 1; } else { rc_varname = duk__getconst(comp_ctx); *out_reg_varbind = -1; *out_rc_varname = rc_varname; return 0; } } /* * Label handling * * Labels are initially added with flags prohibiting both break and continue. * When the statement type is finally uncovered (after potentially multiple * labels), all the labels are updated to allow/prohibit break and continue. */ DUK_LOCAL void duk__add_label(duk_compiler_ctx *comp_ctx, duk_hstring *h_label, duk_int_t pc_label, duk_int_t label_id) { duk_hthread *thr = comp_ctx->thr; duk_size_t n; duk_size_t new_size; duk_uint8_t *p; duk_labelinfo *li_start, *li; /* Duplicate (shadowing) labels are not allowed, except for the empty * labels (which are used as default labels for switch and iteration * statements). * * We could also allow shadowing of non-empty pending labels without any * other issues than breaking the required label shadowing requirements * of the E5 specification, see Section 12.12. */ p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, comp_ctx->curr_func.h_labelinfos); li_start = (duk_labelinfo *) (void *) p; li = (duk_labelinfo *) (void *) (p + DUK_HBUFFER_GET_SIZE(comp_ctx->curr_func.h_labelinfos)); n = (duk_size_t) (li - li_start); while (li > li_start) { li--; if (li->h_label == h_label && h_label != DUK_HTHREAD_STRING_EMPTY_STRING(thr)) { DUK_ERROR_SYNTAX(thr, DUK_STR_DUPLICATE_LABEL); DUK_WO_NORETURN(return;); } } duk_push_hstring(thr, h_label); DUK_ASSERT(n <= DUK_UARRIDX_MAX); /* label limits */ (void) duk_put_prop_index(thr, comp_ctx->curr_func.labelnames_idx, (duk_uarridx_t) n); new_size = (n + 1) * sizeof(duk_labelinfo); duk_hbuffer_resize(thr, comp_ctx->curr_func.h_labelinfos, new_size); /* XXX: slack handling, slow now */ /* relookup after possible realloc */ p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, comp_ctx->curr_func.h_labelinfos); li_start = (duk_labelinfo *) (void *) p; DUK_UNREF(li_start); /* silence scan-build warning */ li = (duk_labelinfo *) (void *) (p + DUK_HBUFFER_GET_SIZE(comp_ctx->curr_func.h_labelinfos)); li--; /* Labels can be used for iteration statements but also for other statements, * in particular a label can be used for a block statement. All cases of a * named label accept a 'break' so that flag is set here. Iteration statements * also allow 'continue', so that flag is updated when we figure out the * statement type. */ li->flags = DUK_LABEL_FLAG_ALLOW_BREAK; li->label_id = label_id; li->h_label = h_label; li->catch_depth = comp_ctx->curr_func.catch_depth; /* catch depth from current func */ li->pc_label = pc_label; DUK_DDD(DUK_DDDPRINT("registered label: flags=0x%08lx, id=%ld, name=%!O, catch_depth=%ld, pc_label=%ld", (unsigned long) li->flags, (long) li->label_id, (duk_heaphdr *) li->h_label, (long) li->catch_depth, (long) li->pc_label)); } /* Update all labels with matching label_id. */ DUK_LOCAL void duk__update_label_flags(duk_compiler_ctx *comp_ctx, duk_int_t label_id, duk_small_uint_t flags) { duk_uint8_t *p; duk_labelinfo *li_start, *li; p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(comp_ctx->thr->heap, comp_ctx->curr_func.h_labelinfos); li_start = (duk_labelinfo *) (void *) p; li = (duk_labelinfo *) (void *) (p + DUK_HBUFFER_GET_SIZE(comp_ctx->curr_func.h_labelinfos)); /* Match labels starting from latest; once label_id no longer matches, we can * safely exit without checking the rest of the labels (only the topmost labels * are ever updated). */ while (li > li_start) { li--; if (li->label_id != label_id) { break; } DUK_DDD(DUK_DDDPRINT("updating (overwriting) label flags for li=%p, label_id=%ld, flags=%ld", (void *) li, (long) label_id, (long) flags)); li->flags = flags; } } /* Lookup active label information. Break/continue distinction is necessary to handle switch * statement related labels correctly: a switch will only catch a 'break', not a 'continue'. * * An explicit label cannot appear multiple times in the active set, but empty labels (unlabelled * iteration and switch statements) can. A break will match the closest unlabelled or labelled * statement. A continue will match the closest unlabelled or labelled iteration statement. It is * a syntax error if a continue matches a labelled switch statement; because an explicit label cannot * be duplicated, the continue cannot match any valid label outside the switch. * * A side effect of these rules is that a LABEL statement related to a switch should never actually * catch a continue abrupt completion at run-time. Hence an INVALID opcode can be placed in the * continue slot of the switch's LABEL statement. */ /* XXX: awkward, especially the bunch of separate output values -> output struct? */ DUK_LOCAL void duk__lookup_active_label(duk_compiler_ctx *comp_ctx, duk_hstring *h_label, duk_bool_t is_break, duk_int_t *out_label_id, duk_int_t *out_label_catch_depth, duk_int_t *out_label_pc, duk_bool_t *out_is_closest) { duk_hthread *thr = comp_ctx->thr; duk_uint8_t *p; duk_labelinfo *li_start, *li_end, *li; duk_bool_t match = 0; DUK_DDD(DUK_DDDPRINT("looking up active label: label='%!O', is_break=%ld", (duk_heaphdr *) h_label, (long) is_break)); DUK_UNREF(thr); p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, comp_ctx->curr_func.h_labelinfos); li_start = (duk_labelinfo *) (void *) p; li_end = (duk_labelinfo *) (void *) (p + DUK_HBUFFER_GET_SIZE(comp_ctx->curr_func.h_labelinfos)); li = li_end; /* Match labels starting from latest label because there can be duplicate empty * labels in the label set. */ while (li > li_start) { li--; if (li->h_label != h_label) { DUK_DDD(DUK_DDDPRINT("labelinfo[%ld] ->'%!O' != %!O", (long) (li - li_start), (duk_heaphdr *) li->h_label, (duk_heaphdr *) h_label)); continue; } DUK_DDD(DUK_DDDPRINT("labelinfo[%ld] -> '%!O' label name matches (still need to check type)", (long) (li - li_start), (duk_heaphdr *) h_label)); /* currently all labels accept a break, so no explicit check for it now */ DUK_ASSERT(li->flags & DUK_LABEL_FLAG_ALLOW_BREAK); if (is_break) { /* break matches always */ match = 1; break; } else if (li->flags & DUK_LABEL_FLAG_ALLOW_CONTINUE) { /* iteration statements allow continue */ match = 1; break; } else { /* continue matched this label -- we can only continue if this is the empty * label, for which duplication is allowed, and thus there is hope of * finding a match deeper in the label stack. */ if (h_label != DUK_HTHREAD_STRING_EMPTY_STRING(thr)) { DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_LABEL); DUK_WO_NORETURN(return;); } else { DUK_DDD(DUK_DDDPRINT("continue matched an empty label which does not " "allow a continue -> continue lookup deeper in label stack")); } } } /* XXX: match flag is awkward, rework */ if (!match) { DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_LABEL); DUK_WO_NORETURN(return;); } DUK_DDD(DUK_DDDPRINT("label match: %!O -> label_id %ld, catch_depth=%ld, pc_label=%ld", (duk_heaphdr *) h_label, (long) li->label_id, (long) li->catch_depth, (long) li->pc_label)); *out_label_id = li->label_id; *out_label_catch_depth = li->catch_depth; *out_label_pc = li->pc_label; *out_is_closest = (li == li_end - 1); } DUK_LOCAL void duk__reset_labels_to_length(duk_compiler_ctx *comp_ctx, duk_size_t len) { duk_hthread *thr = comp_ctx->thr; duk_set_length(thr, comp_ctx->curr_func.labelnames_idx, len); duk_hbuffer_resize(thr, comp_ctx->curr_func.h_labelinfos, sizeof(duk_labelinfo) * len); } /* * Expression parsing: duk__expr_nud(), duk__expr_led(), duk__expr_lbp(), and helpers. * * - duk__expr_nud(): ("null denotation"): process prev_token as a "start" of an expression (e.g. literal) * - duk__expr_led(): ("left denotation"): process prev_token in the "middle" of an expression (e.g. operator) * - duk__expr_lbp(): ("left-binding power"): return left-binding power of curr_token */ /* object literal key tracking flags */ #define DUK__OBJ_LIT_KEY_PLAIN (1 << 0) /* key encountered as a plain property */ #define DUK__OBJ_LIT_KEY_GET (1 << 1) /* key encountered as a getter */ #define DUK__OBJ_LIT_KEY_SET (1 << 2) /* key encountered as a setter */ DUK_LOCAL void duk__nud_array_literal(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_hthread *thr = comp_ctx->thr; duk_regconst_t reg_obj; /* result reg */ duk_regconst_t reg_temp; /* temp reg */ duk_regconst_t temp_start; /* temp reg value for start of loop */ duk_small_uint_t max_init_values; /* max # of values initialized in one MPUTARR set */ duk_small_uint_t num_values; /* number of values in current MPUTARR set */ duk_uarridx_t curr_idx; /* current (next) array index */ duk_uarridx_t start_idx; /* start array index of current MPUTARR set */ duk_uarridx_t init_idx; /* last array index explicitly initialized, +1 */ duk_bool_t require_comma; /* next loop requires a comma */ #if !defined(DUK_USE_PREFER_SIZE) duk_int_t pc_newarr; duk_compiler_instr *instr; #endif /* DUK_TOK_LBRACKET already eaten, current token is right after that */ DUK_ASSERT(comp_ctx->prev_token.t == DUK_TOK_LBRACKET); max_init_values = DUK__MAX_ARRAY_INIT_VALUES; /* XXX: depend on available temps? */ reg_obj = DUK__ALLOCTEMP(comp_ctx); #if !defined(DUK_USE_PREFER_SIZE) pc_newarr = duk__get_current_pc(comp_ctx); #endif duk__emit_bc(comp_ctx, DUK_OP_NEWARR, reg_obj); /* XXX: patch initial size hint afterwards? */ temp_start = DUK__GETTEMP(comp_ctx); /* * Emit initializers in sets of maximum max_init_values. * Corner cases such as single value initializers do not have * special handling now. * * Elided elements must not be emitted as 'undefined' values, * because such values would be enumerable (which is incorrect). * Also note that trailing elisions must be reflected in the * length of the final array but cause no elements to be actually * inserted. */ curr_idx = 0; init_idx = 0; /* tracks maximum initialized index + 1 */ start_idx = 0; require_comma = 0; for (;;) { num_values = 0; DUK__SETTEMP(comp_ctx, temp_start); if (comp_ctx->curr_token.t == DUK_TOK_RBRACKET) { break; } for (;;) { if (comp_ctx->curr_token.t == DUK_TOK_RBRACKET) { /* the outer loop will recheck and exit */ break; } /* comma check */ if (require_comma) { if (comp_ctx->curr_token.t == DUK_TOK_COMMA) { /* comma after a value, expected */ duk__advance(comp_ctx); require_comma = 0; continue; } else { goto syntax_error; } } else { if (comp_ctx->curr_token.t == DUK_TOK_COMMA) { /* elision - flush */ curr_idx++; duk__advance(comp_ctx); /* if num_values > 0, MPUTARR emitted by outer loop after break */ break; } } /* else an array initializer element */ /* initial index */ if (num_values == 0) { start_idx = curr_idx; reg_temp = DUK__ALLOCTEMP(comp_ctx); duk__emit_load_int32(comp_ctx, reg_temp, (duk_int32_t) start_idx); } reg_temp = DUK__ALLOCTEMP(comp_ctx); /* alloc temp just in case, to update max temp */ DUK__SETTEMP(comp_ctx, reg_temp); duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp /*forced_reg*/); DUK__SETTEMP(comp_ctx, reg_temp + 1); num_values++; curr_idx++; require_comma = 1; if (num_values >= max_init_values) { /* MPUTARR emitted by outer loop */ break; } } if (num_values > 0) { /* - A is a source register (it's not a write target, but used * to identify the target object) but can be shuffled. * - B cannot be shuffled normally because it identifies a range * of registers, the emitter has special handling for this * (the "no shuffle" flag must not be set). * - C is a non-register number and cannot be shuffled, but * never needs to be. */ duk__emit_a_b_c(comp_ctx, DUK_OP_MPUTARR | DUK__EMIT_FLAG_NO_SHUFFLE_C | DUK__EMIT_FLAG_A_IS_SOURCE, reg_obj, temp_start, (duk_regconst_t) (num_values + 1)); init_idx = start_idx + num_values; /* num_values and temp_start reset at top of outer loop */ } } /* Update initil size for NEWARR, doesn't need to be exact and is * capped at A field limit. */ #if !defined(DUK_USE_PREFER_SIZE) instr = duk__get_instr_ptr(comp_ctx, pc_newarr); instr->ins |= DUK_ENC_OP_A(0, curr_idx > DUK_BC_A_MAX ? DUK_BC_A_MAX : curr_idx); #endif DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_RBRACKET); duk__advance(comp_ctx); DUK_DDD(DUK_DDDPRINT("array literal done, curridx=%ld, initidx=%ld", (long) curr_idx, (long) init_idx)); /* trailing elisions? */ if (curr_idx > init_idx) { /* yes, must set array length explicitly */ DUK_DDD(DUK_DDDPRINT("array literal has trailing elisions which affect its length")); reg_temp = DUK__ALLOCTEMP(comp_ctx); duk__emit_load_int32(comp_ctx, reg_temp, (duk_int_t) curr_idx); duk__emit_a_bc(comp_ctx, DUK_OP_SETALEN | DUK__EMIT_FLAG_A_IS_SOURCE, reg_obj, reg_temp); } DUK__SETTEMP(comp_ctx, temp_start); duk__ivalue_regconst(res, reg_obj); return; syntax_error: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_ARRAY_LITERAL); DUK_WO_NORETURN(return;); } typedef struct { duk_regconst_t reg_obj; duk_regconst_t temp_start; duk_small_uint_t num_pairs; duk_small_uint_t num_total_pairs; } duk__objlit_state; DUK_LOCAL void duk__objlit_flush_keys(duk_compiler_ctx *comp_ctx, duk__objlit_state *st) { if (st->num_pairs > 0) { /* - A is a source register (it's not a write target, but used * to identify the target object) but can be shuffled. * - B cannot be shuffled normally because it identifies a range * of registers, the emitter has special handling for this * (the "no shuffle" flag must not be set). * - C is a non-register number and cannot be shuffled, but * never needs to be. */ DUK_ASSERT(st->num_pairs > 0); duk__emit_a_b_c(comp_ctx, DUK_OP_MPUTOBJ | DUK__EMIT_FLAG_NO_SHUFFLE_C | DUK__EMIT_FLAG_A_IS_SOURCE, st->reg_obj, st->temp_start, (duk_regconst_t) (st->num_pairs * 2)); st->num_total_pairs += st->num_pairs; st->num_pairs = 0; } DUK__SETTEMP(comp_ctx, st->temp_start); } DUK_LOCAL duk_bool_t duk__objlit_load_key(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_token *tok, duk_regconst_t reg_temp) { if (tok->t_nores == DUK_TOK_IDENTIFIER || tok->t_nores == DUK_TOK_STRING) { /* same handling for identifiers and strings */ DUK_ASSERT(tok->str1 != NULL); duk_push_hstring(comp_ctx->thr, tok->str1); } else if (tok->t == DUK_TOK_NUMBER) { /* numbers can be loaded as numbers and coerced on the fly */ duk_push_number(comp_ctx->thr, tok->num); } else { return 1; /* error */ } duk__ivalue_plain_fromstack(comp_ctx, res); DUK__SETTEMP(comp_ctx, reg_temp + 1); duk__ivalue_toforcedreg(comp_ctx, res, reg_temp); DUK__SETTEMP(comp_ctx, reg_temp + 1); return 0; } DUK_LOCAL void duk__nud_object_literal(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_hthread *thr = comp_ctx->thr; duk__objlit_state st; duk_regconst_t reg_temp; /* temp reg */ duk_small_uint_t max_init_pairs; /* max # of key-value pairs initialized in one MPUTOBJ set */ duk_bool_t first; /* first value: comma must not precede the value */ duk_bool_t is_set, is_get; /* temps */ #if !defined(DUK_USE_PREFER_SIZE) duk_int_t pc_newobj; duk_compiler_instr *instr; #endif DUK_ASSERT(comp_ctx->prev_token.t == DUK_TOK_LCURLY); max_init_pairs = DUK__MAX_OBJECT_INIT_PAIRS; /* XXX: depend on available temps? */ st.reg_obj = DUK__ALLOCTEMP(comp_ctx); /* target object */ st.temp_start = DUK__GETTEMP(comp_ctx); /* start of MPUTOBJ argument list */ st.num_pairs = 0; /* number of key/value pairs emitted for current MPUTOBJ set */ st.num_total_pairs = 0; /* number of key/value pairs emitted overall */ #if !defined(DUK_USE_PREFER_SIZE) pc_newobj = duk__get_current_pc(comp_ctx); #endif duk__emit_bc(comp_ctx, DUK_OP_NEWOBJ, st.reg_obj); /* * Emit initializers in sets of maximum max_init_pairs keys. * Setter/getter is handled separately and terminates the * current set of initializer values. Corner cases such as * single value initializers do not have special handling now. */ first = 1; for (;;) { /* * ES5 and ES2015+ provide a lot of different PropertyDefinition * formats, see http://www.ecma-international.org/ecma-262/6.0/#sec-object-initializer. * * PropertyName can be IdentifierName (includes reserved words), a string * literal, or a number literal. Note that IdentifierName allows 'get' and * 'set' too, so we need to look ahead to the next token to distinguish: * * { get : 1 } * * and * * { get foo() { return 1 } } * { get get() { return 1 } } // 'get' as getter propertyname * * Finally, a trailing comma is allowed. * * Key name is coerced to string at compile time (and ends up as a * a string constant) even for numeric keys (e.g. "{1:'foo'}"). * These could be emitted using e.g. LDINT, but that seems hardly * worth the effort and would increase code size. */ DUK_DDD(DUK_DDDPRINT("object literal loop, curr_token->t = %ld", (long) comp_ctx->curr_token.t)); if (comp_ctx->curr_token.t == DUK_TOK_RCURLY) { break; } if (first) { first = 0; } else { if (comp_ctx->curr_token.t != DUK_TOK_COMMA) { goto syntax_error; } duk__advance(comp_ctx); if (comp_ctx->curr_token.t == DUK_TOK_RCURLY) { /* trailing comma followed by rcurly */ break; } } /* Advance to get one step of lookup. */ duk__advance(comp_ctx); /* Flush current MPUTOBJ if enough many pairs gathered. */ if (st.num_pairs >= max_init_pairs) { duk__objlit_flush_keys(comp_ctx, &st); DUK_ASSERT(st.num_pairs == 0); } /* Reset temp register state and reserve reg_temp and * reg_temp + 1 for handling the current property. */ DUK__SETTEMP(comp_ctx, st.temp_start + 2 * (duk_regconst_t) st.num_pairs); reg_temp = DUK__ALLOCTEMPS(comp_ctx, 2); /* NOTE: "get" and "set" are not officially ReservedWords and the lexer * currently treats them always like ordinary identifiers (DUK_TOK_GET * and DUK_TOK_SET are unused). They need to be detected based on the * identifier string content. */ is_get = (comp_ctx->prev_token.t == DUK_TOK_IDENTIFIER && comp_ctx->prev_token.str1 == DUK_HTHREAD_STRING_GET(thr)); is_set = (comp_ctx->prev_token.t == DUK_TOK_IDENTIFIER && comp_ctx->prev_token.str1 == DUK_HTHREAD_STRING_SET(thr)); if ((is_get || is_set) && comp_ctx->curr_token.t != DUK_TOK_COLON) { /* getter/setter */ duk_int_t fnum; duk__objlit_flush_keys(comp_ctx, &st); DUK_ASSERT(DUK__GETTEMP(comp_ctx) == st.temp_start); /* 2 regs are guaranteed to be allocated w.r.t. temp_max */ reg_temp = DUK__ALLOCTEMPS(comp_ctx, 2); if (duk__objlit_load_key(comp_ctx, res, &comp_ctx->curr_token, reg_temp) != 0) { goto syntax_error; } /* curr_token = get/set name */ fnum = duk__parse_func_like_fnum(comp_ctx, DUK__FUNC_FLAG_GETSET); duk__emit_a_bc(comp_ctx, DUK_OP_CLOSURE, st.temp_start + 1, (duk_regconst_t) fnum); /* Slot C is used in a non-standard fashion (range of regs), * emitter code has special handling for it (must not set the * "no shuffle" flag). */ duk__emit_a_bc(comp_ctx, (is_get ? DUK_OP_INITGET : DUK_OP_INITSET) | DUK__EMIT_FLAG_A_IS_SOURCE, st.reg_obj, st.temp_start); /* temp_start+0 = key, temp_start+1 = closure */ DUK_ASSERT(st.num_pairs == 0); /* temp state is reset on next loop */ #if defined(DUK_USE_ES6) } else if (comp_ctx->prev_token.t == DUK_TOK_IDENTIFIER && (comp_ctx->curr_token.t == DUK_TOK_COMMA || comp_ctx->curr_token.t == DUK_TOK_RCURLY)) { duk_bool_t load_rc; load_rc = duk__objlit_load_key(comp_ctx, res, &comp_ctx->prev_token, reg_temp); DUK_UNREF(load_rc); DUK_ASSERT(load_rc == 0); /* always succeeds because token is identifier */ duk__ivalue_var_hstring(comp_ctx, res, comp_ctx->prev_token.str1); DUK_ASSERT(DUK__GETTEMP(comp_ctx) == reg_temp + 1); duk__ivalue_toforcedreg(comp_ctx, res, reg_temp + 1); st.num_pairs++; } else if ((comp_ctx->prev_token.t == DUK_TOK_IDENTIFIER || comp_ctx->prev_token.t == DUK_TOK_STRING || comp_ctx->prev_token.t == DUK_TOK_NUMBER) && comp_ctx->curr_token.t == DUK_TOK_LPAREN) { duk_int_t fnum; /* Parsing-wise there's a small hickup here: the token parsing * state is one step too advanced for the function parse helper * compared to other cases. The current solution is an extra * flag to indicate whether function parsing should use the * current or the previous token to starting parsing from. */ if (duk__objlit_load_key(comp_ctx, res, &comp_ctx->prev_token, reg_temp) != 0) { goto syntax_error; } fnum = duk__parse_func_like_fnum(comp_ctx, DUK__FUNC_FLAG_USE_PREVTOKEN | DUK__FUNC_FLAG_METDEF); duk__emit_a_bc(comp_ctx, DUK_OP_CLOSURE, reg_temp + 1, (duk_regconst_t) fnum); st.num_pairs++; #endif /* DUK_USE_ES6 */ } else { #if defined(DUK_USE_ES6) if (comp_ctx->prev_token.t == DUK_TOK_LBRACKET) { /* ES2015 computed property name. Executor ToPropertyKey() * coerces the key at runtime. */ DUK__SETTEMP(comp_ctx, reg_temp); duk__expr_toforcedreg(comp_ctx, res, DUK__BP_FOR_EXPR, reg_temp); duk__advance_expect(comp_ctx, DUK_TOK_RBRACKET); /* XXX: If next token is '(' we're dealing with * the method shorthand with a computed name, * e.g. { [Symbol.for('foo')](a,b) {} }. This * form is not yet supported and causes a * SyntaxError on the DUK_TOK_COLON check below. */ } else #endif /* DUK_USE_ES6 */ { if (duk__objlit_load_key(comp_ctx, res, &comp_ctx->prev_token, reg_temp) != 0) { goto syntax_error; } } duk__advance_expect(comp_ctx, DUK_TOK_COLON); DUK__SETTEMP(comp_ctx, reg_temp + 1); duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp + 1 /*forced_reg*/); st.num_pairs++; } } /* property loop */ /* Flush remaining properties. */ duk__objlit_flush_keys(comp_ctx, &st); DUK_ASSERT(st.num_pairs == 0); DUK_ASSERT(DUK__GETTEMP(comp_ctx) == st.temp_start); /* Update initial size for NEWOBJ. The init size doesn't need to be * exact as the purpose is just to avoid object resizes in common * cases. The size is capped to field A limit, and will be too high * if the object literal contains duplicate keys (this is harmless but * increases memory traffic if the object is compacted later on). */ #if !defined(DUK_USE_PREFER_SIZE) instr = duk__get_instr_ptr(comp_ctx, pc_newobj); instr->ins |= DUK_ENC_OP_A(0, st.num_total_pairs > DUK_BC_A_MAX ? DUK_BC_A_MAX : st.num_total_pairs); #endif DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_RCURLY); duk__advance(comp_ctx); /* No RegExp after object literal. */ duk__ivalue_regconst(res, st.reg_obj); return; syntax_error: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_OBJECT_LITERAL); DUK_WO_NORETURN(return;); } /* Parse argument list. Arguments are written to temps starting from * "next temp". Returns number of arguments parsed. Expects left paren * to be already eaten, and eats the right paren before returning. */ DUK_LOCAL duk_int_t duk__parse_arguments(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_int_t nargs = 0; duk_regconst_t reg_temp; /* Note: expect that caller has already eaten the left paren */ DUK_DDD(DUK_DDDPRINT("start parsing arguments, prev_token.t=%ld, curr_token.t=%ld", (long) comp_ctx->prev_token.t, (long) comp_ctx->curr_token.t)); for (;;) { if (comp_ctx->curr_token.t == DUK_TOK_RPAREN) { break; } if (nargs > 0) { duk__advance_expect(comp_ctx, DUK_TOK_COMMA); } /* We want the argument expression value to go to "next temp" * without additional moves. That should almost always be the * case, but we double check after expression parsing. * * This is not the cleanest possible approach. */ reg_temp = DUK__ALLOCTEMP(comp_ctx); /* bump up "allocated" reg count, just in case */ DUK__SETTEMP(comp_ctx, reg_temp); /* binding power must be high enough to NOT allow comma expressions directly */ duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp); /* always allow 'in', coerce to 'tr' just in case */ DUK__SETTEMP(comp_ctx, reg_temp + 1); nargs++; DUK_DDD(DUK_DDDPRINT("argument #%ld written into reg %ld", (long) nargs, (long) reg_temp)); } /* eat the right paren */ duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); /* RegExp mode does not matter. */ DUK_DDD(DUK_DDDPRINT("end parsing arguments")); return nargs; } DUK_LOCAL duk_bool_t duk__expr_is_empty(duk_compiler_ctx *comp_ctx) { /* empty expressions can be detected conveniently with nud/led counts */ return (comp_ctx->curr_func.nud_count == 0) && (comp_ctx->curr_func.led_count == 0); } DUK_LOCAL void duk__expr_nud(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_hthread *thr = comp_ctx->thr; duk_token *tk; duk_regconst_t temp_at_entry; duk_small_uint_t tok; duk_uint32_t args; /* temp variable to pass constants and flags to shared code */ /* * ctx->prev_token token to process with duk__expr_nud() * ctx->curr_token updated by caller * * Note: the token in the switch below has already been eaten. */ temp_at_entry = DUK__GETTEMP(comp_ctx); comp_ctx->curr_func.nud_count++; tk = &comp_ctx->prev_token; tok = tk->t; res->t = DUK_IVAL_NONE; DUK_DDD(DUK_DDDPRINT("duk__expr_nud(), prev_token.t=%ld, allow_in=%ld, paren_level=%ld", (long) tk->t, (long) comp_ctx->curr_func.allow_in, (long) comp_ctx->curr_func.paren_level)); switch (tok) { /* PRIMARY EXPRESSIONS */ case DUK_TOK_THIS: { duk_regconst_t reg_temp; reg_temp = DUK__ALLOCTEMP(comp_ctx); duk__emit_bc(comp_ctx, DUK_OP_LDTHIS, reg_temp); duk__ivalue_regconst(res, reg_temp); return; } case DUK_TOK_IDENTIFIER: { duk__ivalue_var_hstring(comp_ctx, res, tk->str1); return; } case DUK_TOK_NULL: { duk_push_null(thr); goto plain_value; } case DUK_TOK_TRUE: { duk_push_true(thr); goto plain_value; } case DUK_TOK_FALSE: { duk_push_false(thr); goto plain_value; } case DUK_TOK_NUMBER: { duk_push_number(thr, tk->num); goto plain_value; } case DUK_TOK_STRING: { DUK_ASSERT(tk->str1 != NULL); duk_push_hstring(thr, tk->str1); goto plain_value; } case DUK_TOK_REGEXP: { #if defined(DUK_USE_REGEXP_SUPPORT) duk_regconst_t reg_temp; duk_regconst_t rc_re_bytecode; /* const */ duk_regconst_t rc_re_source; /* const */ DUK_ASSERT(tk->str1 != NULL); DUK_ASSERT(tk->str2 != NULL); DUK_DDD(DUK_DDDPRINT("emitting regexp op, str1=%!O, str2=%!O", (duk_heaphdr *) tk->str1, (duk_heaphdr *) tk->str2)); reg_temp = DUK__ALLOCTEMP(comp_ctx); duk_push_hstring(thr, tk->str1); duk_push_hstring(thr, tk->str2); /* [ ... pattern flags ] */ duk_regexp_compile(thr); /* [ ... escaped_source bytecode ] */ rc_re_bytecode = duk__getconst(comp_ctx); rc_re_source = duk__getconst(comp_ctx); duk__emit_a_b_c(comp_ctx, DUK_OP_REGEXP | DUK__EMIT_FLAG_BC_REGCONST, reg_temp /*a*/, rc_re_bytecode /*b*/, rc_re_source /*c*/); duk__ivalue_regconst(res, reg_temp); return; #else /* DUK_USE_REGEXP_SUPPORT */ goto syntax_error; #endif /* DUK_USE_REGEXP_SUPPORT */ } case DUK_TOK_LBRACKET: { DUK_DDD(DUK_DDDPRINT("parsing array literal")); duk__nud_array_literal(comp_ctx, res); return; } case DUK_TOK_LCURLY: { DUK_DDD(DUK_DDDPRINT("parsing object literal")); duk__nud_object_literal(comp_ctx, res); return; } case DUK_TOK_LPAREN: { duk_bool_t prev_allow_in; comp_ctx->curr_func.paren_level++; prev_allow_in = comp_ctx->curr_func.allow_in; comp_ctx->curr_func.allow_in = 1; /* reset 'allow_in' for parenthesized expression */ duk__expr(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); /* Expression, terminates at a ')' */ duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); /* No RegExp after parenthesized expression. */ comp_ctx->curr_func.allow_in = prev_allow_in; comp_ctx->curr_func.paren_level--; return; } /* MEMBER/NEW/CALL EXPRESSIONS */ case DUK_TOK_NEW: { /* * Parsing an expression starting with 'new' is tricky because * there are multiple possible productions deriving from * LeftHandSideExpression which begin with 'new'. * * We currently resort to one-token lookahead to distinguish the * cases. Hopefully this is correct. The binding power must be * such that parsing ends at an LPAREN (CallExpression) but not at * a PERIOD or LBRACKET (MemberExpression). * * See doc/compiler.rst for discussion on the parsing approach, * and testcases/test-dev-new.js for a bunch of documented tests. */ duk_regconst_t reg_target; duk_int_t nargs; DUK_DDD(DUK_DDDPRINT("begin parsing new expression")); reg_target = DUK__ALLOCTEMPS(comp_ctx, 2); #if defined(DUK_USE_ES6) if (comp_ctx->curr_token.t == DUK_TOK_PERIOD) { /* new.target */ DUK_DDD(DUK_DDDPRINT("new.target")); duk__advance(comp_ctx); if (comp_ctx->curr_token.t_nores != DUK_TOK_IDENTIFIER || !duk_hstring_equals_ascii_cstring(comp_ctx->curr_token.str1, "target")) { goto syntax_error_newtarget; } if (comp_ctx->curr_func.is_global) { goto syntax_error_newtarget; } duk__advance(comp_ctx); duk__emit_bc(comp_ctx, DUK_OP_NEWTARGET, reg_target); duk__ivalue_regconst(res, reg_target); return; } #endif /* DUK_USE_ES6 */ duk__expr_toforcedreg(comp_ctx, res, DUK__BP_CALL /*rbp_flags*/, reg_target /*forced_reg*/); duk__emit_bc(comp_ctx, DUK_OP_NEWOBJ, reg_target + 1); /* default instance */ DUK__SETTEMP(comp_ctx, reg_target + 2); /* XXX: 'new obj.noSuch()' doesn't use GETPROPC now which * makes the error message worse than for obj.noSuch(). */ if (comp_ctx->curr_token.t == DUK_TOK_LPAREN) { /* 'new' MemberExpression Arguments */ DUK_DDD(DUK_DDDPRINT("new expression has argument list")); duk__advance(comp_ctx); nargs = duk__parse_arguments(comp_ctx, res); /* parse args starting from "next temp", reg_target + 1 */ /* right paren eaten */ } else { /* 'new' MemberExpression */ DUK_DDD(DUK_DDDPRINT("new expression has no argument list")); nargs = 0; } duk__emit_a_bc(comp_ctx, DUK_OP_CALL0 | DUK_BC_CALL_FLAG_CONSTRUCT, nargs /*num_args*/, reg_target /*target*/); DUK_DDD(DUK_DDDPRINT("end parsing new expression")); duk__ivalue_regconst(res, reg_target); return; } /* FUNCTION EXPRESSIONS */ case DUK_TOK_FUNCTION: { /* Function expression. Note that any statement beginning with 'function' * is handled by the statement parser as a function declaration, or a * non-standard function expression/statement (or a SyntaxError). We only * handle actual function expressions (occurring inside an expression) here. * * O(depth^2) parse count for inner functions is handled by recording a * lexer offset on the first compilation pass, so that the function can * be efficiently skipped on the second pass. This is encapsulated into * duk__parse_func_like_fnum(). */ duk_regconst_t reg_temp; duk_int_t fnum; reg_temp = DUK__ALLOCTEMP(comp_ctx); /* curr_token follows 'function' */ fnum = duk__parse_func_like_fnum(comp_ctx, 0 /*flags*/); DUK_DDD(DUK_DDDPRINT("parsed inner function -> fnum %ld", (long) fnum)); duk__emit_a_bc(comp_ctx, DUK_OP_CLOSURE, reg_temp /*a*/, (duk_regconst_t) fnum /*bc*/); duk__ivalue_regconst(res, reg_temp); return; } /* UNARY EXPRESSIONS */ case DUK_TOK_DELETE: { /* Delete semantics are a bit tricky. The description in E5 specification * is kind of confusing, because it distinguishes between resolvability of * a reference (which is only known at runtime) seemingly at compile time * (= SyntaxError throwing). */ duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */ if (res->t == DUK_IVAL_VAR) { /* not allowed in strict mode, regardless of whether resolves; * in non-strict mode DELVAR handles both non-resolving and * resolving cases (the specification description is a bit confusing). */ duk_regconst_t reg_temp; duk_regconst_t reg_varbind; duk_regconst_t rc_varname; if (comp_ctx->curr_func.is_strict) { DUK_ERROR_SYNTAX(thr, DUK_STR_CANNOT_DELETE_IDENTIFIER); DUK_WO_NORETURN(return;); } DUK__SETTEMP(comp_ctx, temp_at_entry); reg_temp = DUK__ALLOCTEMP(comp_ctx); duk_dup(thr, res->x1.valstack_idx); if (duk__lookup_lhs(comp_ctx, ®_varbind, &rc_varname)) { /* register bound variables are non-configurable -> always false */ duk__emit_bc(comp_ctx, DUK_OP_LDFALSE, reg_temp); } else { duk_dup(thr, res->x1.valstack_idx); rc_varname = duk__getconst(comp_ctx); duk__emit_a_bc(comp_ctx, DUK_OP_DELVAR, reg_temp, rc_varname); } duk__ivalue_regconst(res, reg_temp); } else if (res->t == DUK_IVAL_PROP) { duk_regconst_t reg_temp; duk_regconst_t reg_obj; duk_regconst_t rc_key; DUK__SETTEMP(comp_ctx, temp_at_entry); reg_temp = DUK__ALLOCTEMP(comp_ctx); reg_obj = duk__ispec_toregconst_raw(comp_ctx, &res->x1, -1 /*forced_reg*/, 0 /*flags*/); /* don't allow const */ rc_key = duk__ispec_toregconst_raw(comp_ctx, &res->x2, -1 /*forced_reg*/, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/); duk__emit_a_b_c(comp_ctx, DUK_OP_DELPROP | DUK__EMIT_FLAG_BC_REGCONST, reg_temp, reg_obj, rc_key); duk__ivalue_regconst(res, reg_temp); } else { /* non-Reference deletion is always 'true', even in strict mode */ duk_push_true(thr); goto plain_value; } return; } case DUK_TOK_VOID: { duk__expr_toplain_ignore(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */ duk_push_undefined(thr); goto plain_value; } case DUK_TOK_TYPEOF: { /* 'typeof' must handle unresolvable references without throwing * a ReferenceError (E5 Section 11.4.3). Register mapped values * will never be unresolvable so special handling is only required * when an identifier is a "slow path" one. */ duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */ if (res->t == DUK_IVAL_VAR) { duk_regconst_t reg_varbind; duk_regconst_t rc_varname; duk_regconst_t reg_temp; duk_dup(thr, res->x1.valstack_idx); if (!duk__lookup_lhs(comp_ctx, ®_varbind, &rc_varname)) { DUK_DDD(DUK_DDDPRINT("typeof for an identifier name which could not be resolved " "at compile time, need to use special run-time handling")); reg_temp = DUK__ALLOCTEMP(comp_ctx); duk__emit_a_bc(comp_ctx, DUK_OP_TYPEOFID, reg_temp, rc_varname); duk__ivalue_regconst(res, reg_temp); return; } } args = DUK_OP_TYPEOF; goto unary; } case DUK_TOK_INCREMENT: { args = (DUK_OP_PREINCP << 8) + DUK_OP_PREINCR; goto preincdec; } case DUK_TOK_DECREMENT: { args = (DUK_OP_PREDECP << 8) + DUK_OP_PREDECR; goto preincdec; } case DUK_TOK_ADD: { /* unary plus */ duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */ if (res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_VALUE && duk_is_number(thr, res->x1.valstack_idx)) { /* unary plus of a number is identity */ return; } args = DUK_OP_UNP; goto unary; } case DUK_TOK_SUB: { /* unary minus */ duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */ if (res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_VALUE && duk_is_number(thr, res->x1.valstack_idx)) { /* this optimization is important to handle negative literals * (which are not directly provided by the lexical grammar) */ duk_tval *tv_num; duk_double_union du; tv_num = DUK_GET_TVAL_POSIDX(thr, res->x1.valstack_idx); DUK_ASSERT(tv_num != NULL); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_num)); du.d = DUK_TVAL_GET_NUMBER(tv_num); du.d = -du.d; DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du); DUK_TVAL_SET_NUMBER(tv_num, du.d); return; } args = DUK_OP_UNM; goto unary; } case DUK_TOK_BNOT: { duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */ args = DUK_OP_BNOT; goto unary; } case DUK_TOK_LNOT: { duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */ if (res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_VALUE) { /* Very minimal inlining to handle common idioms '!0' and '!1', * and also boolean arguments like '!false' and '!true'. */ duk_tval *tv_val; tv_val = DUK_GET_TVAL_POSIDX(thr, res->x1.valstack_idx); DUK_ASSERT(tv_val != NULL); if (DUK_TVAL_IS_NUMBER(tv_val)) { duk_double_t d; d = DUK_TVAL_GET_NUMBER(tv_val); if (d == 0.0) { /* Matches both +0 and -0 on purpose. */ DUK_DDD(DUK_DDDPRINT("inlined lnot: !0 -> true")); DUK_TVAL_SET_BOOLEAN_TRUE(tv_val); return; } else if (d == 1.0) { DUK_DDD(DUK_DDDPRINT("inlined lnot: !1 -> false")); DUK_TVAL_SET_BOOLEAN_FALSE(tv_val); return; } } else if (DUK_TVAL_IS_BOOLEAN(tv_val)) { duk_small_uint_t v; v = DUK_TVAL_GET_BOOLEAN(tv_val); DUK_DDD(DUK_DDDPRINT("inlined lnot boolean: %ld", (long) v)); DUK_ASSERT(v == 0 || v == 1); DUK_TVAL_SET_BOOLEAN(tv_val, v ^ 0x01); return; } } args = DUK_OP_LNOT; goto unary; } } /* end switch */ DUK_ERROR_SYNTAX(thr, DUK_STR_PARSE_ERROR); DUK_WO_NORETURN(return;); unary: { /* Unary opcodes use just the 'BC' register source because it * matches current shuffle limits, and maps cleanly to 16 high * bits of the opcode. */ duk_regconst_t reg_src, reg_res; reg_src = duk__ivalue_toregconst_raw(comp_ctx, res, -1 /*forced_reg*/, 0 /*flags*/); if (DUK__ISREG_TEMP(comp_ctx, reg_src)) { reg_res = reg_src; } else { reg_res = DUK__ALLOCTEMP(comp_ctx); } duk__emit_a_bc(comp_ctx, args, reg_res, reg_src); duk__ivalue_regconst(res, reg_res); return; } preincdec: { /* preincrement and predecrement */ duk_regconst_t reg_res; duk_small_uint_t args_op1 = args & 0xff; /* DUK_OP_PREINCR/DUK_OP_PREDECR */ duk_small_uint_t args_op2 = args >> 8; /* DUK_OP_PREINCP_RR/DUK_OP_PREDECP_RR */ /* Specific assumptions for opcode numbering. */ DUK_ASSERT(DUK_OP_PREINCR + 4 == DUK_OP_PREINCV); DUK_ASSERT(DUK_OP_PREDECR + 4 == DUK_OP_PREDECV); reg_res = DUK__ALLOCTEMP(comp_ctx); duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */ if (res->t == DUK_IVAL_VAR) { duk_hstring *h_varname; duk_regconst_t reg_varbind; duk_regconst_t rc_varname; h_varname = duk_known_hstring(thr, res->x1.valstack_idx); if (duk__hstring_is_eval_or_arguments_in_strict_mode(comp_ctx, h_varname)) { goto syntax_error; } duk_dup(thr, res->x1.valstack_idx); if (duk__lookup_lhs(comp_ctx, ®_varbind, &rc_varname)) { duk__emit_a_bc(comp_ctx, args_op1, /* e.g. DUK_OP_PREINCR */ reg_res, reg_varbind); } else { duk__emit_a_bc(comp_ctx, args_op1 + 4, /* e.g. DUK_OP_PREINCV */ reg_res, rc_varname); } DUK_DDD(DUK_DDDPRINT("preincdec to '%!O' -> reg_varbind=%ld, rc_varname=%ld", (duk_heaphdr *) h_varname, (long) reg_varbind, (long) rc_varname)); } else if (res->t == DUK_IVAL_PROP) { duk_regconst_t reg_obj; /* allocate to reg only (not const) */ duk_regconst_t rc_key; reg_obj = duk__ispec_toregconst_raw(comp_ctx, &res->x1, -1 /*forced_reg*/, 0 /*flags*/); /* don't allow const */ rc_key = duk__ispec_toregconst_raw(comp_ctx, &res->x2, -1 /*forced_reg*/, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/); duk__emit_a_b_c(comp_ctx, args_op2 | DUK__EMIT_FLAG_BC_REGCONST, /* e.g. DUK_OP_PREINCP */ reg_res, reg_obj, rc_key); } else { /* Technically return value is not needed because INVLHS will * unconditially throw a ReferenceError. Coercion is necessary * for proper semantics (consider ToNumber() called for an object). * Use DUK_OP_UNP with a dummy register to get ToNumber(). */ duk__ivalue_toforcedreg(comp_ctx, res, reg_res); duk__emit_bc(comp_ctx, DUK_OP_UNP, reg_res); /* for side effects, result ignored */ duk__emit_op_only(comp_ctx, DUK_OP_INVLHS); } DUK__SETTEMP(comp_ctx, reg_res + 1); duk__ivalue_regconst(res, reg_res); return; } plain_value: { /* Stack top contains plain value */ duk__ivalue_plain_fromstack(comp_ctx, res); return; } #if defined(DUK_USE_ES6) syntax_error_newtarget: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_NEWTARGET); DUK_WO_NORETURN(return;); #endif syntax_error: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_EXPRESSION); DUK_WO_NORETURN(return;); } /* XXX: add flag to indicate whether caller cares about return value; this * affects e.g. handling of assignment expressions. This change needs API * changes elsewhere too. */ DUK_LOCAL void duk__expr_led(duk_compiler_ctx *comp_ctx, duk_ivalue *left, duk_ivalue *res) { duk_hthread *thr = comp_ctx->thr; duk_token *tk; duk_small_uint_t tok; duk_uint32_t args; /* temp variable to pass constants and flags to shared code */ /* * ctx->prev_token token to process with duk__expr_led() * ctx->curr_token updated by caller */ comp_ctx->curr_func.led_count++; /* The token in the switch has already been eaten here */ tk = &comp_ctx->prev_token; tok = tk->t; DUK_DDD(DUK_DDDPRINT("duk__expr_led(), prev_token.t=%ld, allow_in=%ld, paren_level=%ld", (long) tk->t, (long) comp_ctx->curr_func.allow_in, (long) comp_ctx->curr_func.paren_level)); /* XXX: default priority for infix operators is duk__expr_lbp(tok) -> get it here? */ switch (tok) { /* PRIMARY EXPRESSIONS */ case DUK_TOK_PERIOD: { /* Property access expressions are critical for correct LHS ordering, * see comments in duk__expr()! * * A conservative approach would be to use duk__ivalue_totempconst() * for 'left'. However, allowing a reg-bound variable seems safe here * and is nice because "foo.bar" is a common expression. If the ivalue * is used in an expression a GETPROP will occur before any changes to * the base value can occur. If the ivalue is used as an assignment * LHS, the assignment code will ensure the base value is safe from * RHS mutation. */ /* XXX: This now coerces an identifier into a GETVAR to a temp, which * causes an extra LDREG in call setup. It's sufficient to coerce to a * unary ivalue? */ duk__ivalue_toplain(comp_ctx, left); /* NB: must accept reserved words as property name */ if (comp_ctx->curr_token.t_nores != DUK_TOK_IDENTIFIER) { DUK_ERROR_SYNTAX(thr, DUK_STR_EXPECTED_IDENTIFIER); DUK_WO_NORETURN(return;); } res->t = DUK_IVAL_PROP; duk__copy_ispec(comp_ctx, &left->x1, &res->x1); /* left.x1 -> res.x1 */ DUK_ASSERT(comp_ctx->curr_token.str1 != NULL); duk_push_hstring(thr, comp_ctx->curr_token.str1); duk_replace(thr, res->x2.valstack_idx); res->x2.t = DUK_ISPEC_VALUE; /* special RegExp literal handling after IdentifierName */ comp_ctx->curr_func.reject_regexp_in_adv = 1; duk__advance(comp_ctx); return; } case DUK_TOK_LBRACKET: { /* Property access expressions are critical for correct LHS ordering, * see comments in duk__expr()! */ /* XXX: optimize temp reg use */ /* XXX: similar coercion issue as in DUK_TOK_PERIOD */ /* XXX: coerce to regs? it might be better for enumeration use, where the * same PROP ivalue is used multiple times. Or perhaps coerce PROP further * there? */ /* XXX: for simple cases like x['y'] an unnecessary LDREG is * emitted for the base value; could avoid it if we knew that * the key expression is safe (e.g. just a single literal). */ /* The 'left' value must not be a register bound variable * because it may be mutated during the rest of the expression * and E5.1 Section 11.2.1 specifies the order of evaluation * so that the base value is evaluated first. * See: test-bug-nested-prop-mutate.js. */ duk__ivalue_totempconst(comp_ctx, left); duk__expr_toplain(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); /* Expression, ']' terminates */ duk__advance_expect(comp_ctx, DUK_TOK_RBRACKET); res->t = DUK_IVAL_PROP; duk__copy_ispec(comp_ctx, &res->x1, &res->x2); /* res.x1 -> res.x2 */ duk__copy_ispec(comp_ctx, &left->x1, &res->x1); /* left.x1 -> res.x1 */ return; } case DUK_TOK_LPAREN: { /* function call */ duk_regconst_t reg_cs = DUK__ALLOCTEMPS(comp_ctx, 2); duk_int_t nargs; duk_small_uint_t call_op = DUK_OP_CALL0; /* XXX: attempt to get the call result to "next temp" whenever * possible to avoid unnecessary register shuffles. */ /* * Setup call: target and 'this' binding. Three cases: * * 1. Identifier base (e.g. "foo()") * 2. Property base (e.g. "foo.bar()") * 3. Register base (e.g. "foo()()"; i.e. when a return value is a function) */ if (left->t == DUK_IVAL_VAR) { duk_hstring *h_varname; duk_regconst_t reg_varbind; duk_regconst_t rc_varname; DUK_DDD(DUK_DDDPRINT("function call with identifier base")); h_varname = duk_known_hstring(thr, left->x1.valstack_idx); if (h_varname == DUK_HTHREAD_STRING_EVAL(thr)) { /* Potential direct eval call detected, flag the CALL * so that a run-time "direct eval" check is made and * special behavior may be triggered. Note that this * does not prevent 'eval' from being register bound. */ DUK_DDD(DUK_DDDPRINT("function call with identifier 'eval' " "-> using EVALCALL, marking function " "as may_direct_eval")); call_op |= DUK_BC_CALL_FLAG_CALLED_AS_EVAL; comp_ctx->curr_func.may_direct_eval = 1; } duk_dup(thr, left->x1.valstack_idx); if (duk__lookup_lhs(comp_ctx, ®_varbind, &rc_varname)) { duk__emit_a_bc(comp_ctx, DUK_OP_CSREG | DUK__EMIT_FLAG_A_IS_SOURCE, reg_varbind, reg_cs + 0); } else { /* XXX: expand target register or constant field to * reduce shuffling. */ DUK_ASSERT(DUK__ISCONST(rc_varname)); duk__emit_a_b(comp_ctx, DUK_OP_CSVAR | DUK__EMIT_FLAG_BC_REGCONST, reg_cs + 0, rc_varname); } } else if (left->t == DUK_IVAL_PROP) { /* Call through a property lookup, E5 Section 11.2.3, step 6.a.i, * E5 Section 10.4.3. There used to be a separate CSPROP opcode * but a typical call setup took 3 opcodes (e.g. LDREG, LDCONST, * CSPROP) and the same can be achieved with ordinary loads. */ #if defined(DUK_USE_VERBOSE_ERRORS) duk_regconst_t reg_key; #endif DUK_DDD(DUK_DDDPRINT("function call with property base")); /* XXX: For Math.sin() this generates: LDCONST + LDREG + * GETPROPC + call. The LDREG is unnecessary because LDCONST * could be loaded directly into reg_cs + 1. This doesn't * happen now because a variable cannot be in left->x1 of a * DUK_IVAL_PROP. We could notice that left->x1 is a temp * and reuse, but it would still be in the wrong position * (reg_cs + 0 rather than reg_cs + 1). */ duk__ispec_toforcedreg(comp_ctx, &left->x1, reg_cs + 1); /* base */ #if defined(DUK_USE_VERBOSE_ERRORS) reg_key = duk__ispec_toregconst_raw(comp_ctx, &left->x2, -1, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/); duk__emit_a_b_c(comp_ctx, DUK_OP_GETPROPC | DUK__EMIT_FLAG_BC_REGCONST, reg_cs + 0, reg_cs + 1, reg_key); #else duk__ivalue_toforcedreg(comp_ctx, left, reg_cs + 0); /* base[key] */ #endif } else { DUK_DDD(DUK_DDDPRINT("function call with register base")); duk__ivalue_toforcedreg(comp_ctx, left, reg_cs + 0); #if 0 duk__emit_a_bc(comp_ctx, DUK_OP_CSREG | DUK__EMIT_FLAG_A_IS_SOURCE, reg_cs + 0, reg_cs + 0); /* in-place setup */ #endif /* Because of in-place setup, REGCS is equivalent to * just this LDUNDEF. */ duk__emit_bc(comp_ctx, DUK_OP_LDUNDEF, reg_cs + 1); } DUK__SETTEMP(comp_ctx, reg_cs + 2); nargs = duk__parse_arguments(comp_ctx, res); /* parse args starting from "next temp" */ /* Tailcalls are handled by back-patching the already emitted opcode * later in return statement parser. */ duk__emit_a_bc(comp_ctx, call_op, (duk_regconst_t) nargs /*numargs*/, reg_cs /*basereg*/); DUK__SETTEMP(comp_ctx, reg_cs + 1); /* result in csreg */ duk__ivalue_regconst(res, reg_cs); return; } /* POSTFIX EXPRESSION */ case DUK_TOK_INCREMENT: { args = (DUK_OP_POSTINCP_RR << 16) + (DUK_OP_POSTINCR << 8) + 0; goto postincdec; } case DUK_TOK_DECREMENT: { args = (DUK_OP_POSTDECP_RR << 16) + (DUK_OP_POSTDECR << 8) + 0; goto postincdec; } /* EXPONENTIATION EXPRESSION */ #if defined(DUK_USE_ES7_EXP_OPERATOR) case DUK_TOK_EXP: { args = (DUK_OP_EXP << 8) + DUK__BP_EXPONENTIATION - 1; /* UnaryExpression */ goto binary; } #endif /* MULTIPLICATIVE EXPRESSION */ case DUK_TOK_MUL: { args = (DUK_OP_MUL << 8) + DUK__BP_MULTIPLICATIVE; /* ExponentiationExpression */ goto binary; } case DUK_TOK_DIV: { args = (DUK_OP_DIV << 8) + DUK__BP_MULTIPLICATIVE; /* ExponentiationExpression */ goto binary; } case DUK_TOK_MOD: { args = (DUK_OP_MOD << 8) + DUK__BP_MULTIPLICATIVE; /* ExponentiationExpression */ goto binary; } /* ADDITIVE EXPRESSION */ case DUK_TOK_ADD: { args = (DUK_OP_ADD << 8) + DUK__BP_ADDITIVE; /* MultiplicativeExpression */ goto binary; } case DUK_TOK_SUB: { args = (DUK_OP_SUB << 8) + DUK__BP_ADDITIVE; /* MultiplicativeExpression */ goto binary; } /* SHIFT EXPRESSION */ case DUK_TOK_ALSHIFT: { /* << */ args = (DUK_OP_BASL << 8) + DUK__BP_SHIFT; goto binary; } case DUK_TOK_ARSHIFT: { /* >> */ args = (DUK_OP_BASR << 8) + DUK__BP_SHIFT; goto binary; } case DUK_TOK_RSHIFT: { /* >>> */ args = (DUK_OP_BLSR << 8) + DUK__BP_SHIFT; goto binary; } /* RELATIONAL EXPRESSION */ case DUK_TOK_LT: { /* < */ args = (DUK_OP_LT << 8) + DUK__BP_RELATIONAL; goto binary; } case DUK_TOK_GT: { args = (DUK_OP_GT << 8) + DUK__BP_RELATIONAL; goto binary; } case DUK_TOK_LE: { args = (DUK_OP_LE << 8) + DUK__BP_RELATIONAL; goto binary; } case DUK_TOK_GE: { args = (DUK_OP_GE << 8) + DUK__BP_RELATIONAL; goto binary; } case DUK_TOK_INSTANCEOF: { args = (DUK_OP_INSTOF << 8) + DUK__BP_RELATIONAL; goto binary; } case DUK_TOK_IN: { args = (DUK_OP_IN << 8) + DUK__BP_RELATIONAL; goto binary; } /* EQUALITY EXPRESSION */ case DUK_TOK_EQ: { args = (DUK_OP_EQ << 8) + DUK__BP_EQUALITY; goto binary; } case DUK_TOK_NEQ: { args = (DUK_OP_NEQ << 8) + DUK__BP_EQUALITY; goto binary; } case DUK_TOK_SEQ: { args = (DUK_OP_SEQ << 8) + DUK__BP_EQUALITY; goto binary; } case DUK_TOK_SNEQ: { args = (DUK_OP_SNEQ << 8) + DUK__BP_EQUALITY; goto binary; } /* BITWISE EXPRESSIONS */ case DUK_TOK_BAND: { args = (DUK_OP_BAND << 8) + DUK__BP_BAND; goto binary; } case DUK_TOK_BXOR: { args = (DUK_OP_BXOR << 8) + DUK__BP_BXOR; goto binary; } case DUK_TOK_BOR: { args = (DUK_OP_BOR << 8) + DUK__BP_BOR; goto binary; } /* LOGICAL EXPRESSIONS */ case DUK_TOK_LAND: { /* syntactically left-associative but parsed as right-associative */ args = (1 << 8) + DUK__BP_LAND - 1; goto binary_logical; } case DUK_TOK_LOR: { /* syntactically left-associative but parsed as right-associative */ args = (0 << 8) + DUK__BP_LOR - 1; goto binary_logical; } /* CONDITIONAL EXPRESSION */ case DUK_TOK_QUESTION: { /* XXX: common reg allocation need is to reuse a sub-expression's temp reg, * but only if it really is a temp. Nothing fancy here now. */ duk_regconst_t reg_temp; duk_int_t pc_jump1; duk_int_t pc_jump2; reg_temp = DUK__ALLOCTEMP(comp_ctx); duk__ivalue_toforcedreg(comp_ctx, left, reg_temp); duk__emit_if_true_skip(comp_ctx, reg_temp); pc_jump1 = duk__emit_jump_empty(comp_ctx); /* jump to false */ duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp /*forced_reg*/); /* AssignmentExpression */ duk__advance_expect(comp_ctx, DUK_TOK_COLON); pc_jump2 = duk__emit_jump_empty(comp_ctx); /* jump to end */ duk__patch_jump_here(comp_ctx, pc_jump1); duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp /*forced_reg*/); /* AssignmentExpression */ duk__patch_jump_here(comp_ctx, pc_jump2); DUK__SETTEMP(comp_ctx, reg_temp + 1); duk__ivalue_regconst(res, reg_temp); return; } /* ASSIGNMENT EXPRESSION */ case DUK_TOK_EQUALSIGN: { /* * Assignments are right associative, allows e.g. * a = 5; * a += b = 9; // same as a += (b = 9) * -> expression value 14, a = 14, b = 9 * * Right associativiness is reflected in the BP for recursion, * "-1" ensures assignment operations are allowed. * * XXX: just use DUK__BP_COMMA (i.e. no need for 2-step bp levels)? */ args = (DUK_OP_NONE << 8) + DUK__BP_ASSIGNMENT - 1; /* DUK_OP_NONE marks a 'plain' assignment */ goto assign; } case DUK_TOK_ADD_EQ: { /* right associative */ args = (DUK_OP_ADD << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } case DUK_TOK_SUB_EQ: { /* right associative */ args = (DUK_OP_SUB << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } case DUK_TOK_MUL_EQ: { /* right associative */ args = (DUK_OP_MUL << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } case DUK_TOK_DIV_EQ: { /* right associative */ args = (DUK_OP_DIV << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } case DUK_TOK_MOD_EQ: { /* right associative */ args = (DUK_OP_MOD << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } #if defined(DUK_USE_ES7_EXP_OPERATOR) case DUK_TOK_EXP_EQ: { /* right associative */ args = (DUK_OP_EXP << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } #endif case DUK_TOK_ALSHIFT_EQ: { /* right associative */ args = (DUK_OP_BASL << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } case DUK_TOK_ARSHIFT_EQ: { /* right associative */ args = (DUK_OP_BASR << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } case DUK_TOK_RSHIFT_EQ: { /* right associative */ args = (DUK_OP_BLSR << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } case DUK_TOK_BAND_EQ: { /* right associative */ args = (DUK_OP_BAND << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } case DUK_TOK_BOR_EQ: { /* right associative */ args = (DUK_OP_BOR << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } case DUK_TOK_BXOR_EQ: { /* right associative */ args = (DUK_OP_BXOR << 8) + DUK__BP_ASSIGNMENT - 1; goto assign; } /* COMMA */ case DUK_TOK_COMMA: { /* right associative */ duk__ivalue_toplain_ignore(comp_ctx, left); /* need side effects, not value */ duk__expr_toplain(comp_ctx, res, DUK__BP_COMMA - 1 /*rbp_flags*/); /* return 'res' (of right part) as our result */ return; } default: { break; } } DUK_D(DUK_DPRINT("parse error: unexpected token: %ld", (long) tok)); DUK_ERROR_SYNTAX(thr, DUK_STR_PARSE_ERROR); DUK_WO_NORETURN(return;); #if 0 /* XXX: shared handling for 'duk__expr_lhs'? */ if (comp_ctx->curr_func.paren_level == 0 && XXX) { comp_ctx->curr_func.duk__expr_lhs = 0; } #endif binary: /* * Shared handling of binary operations * * args = (opcode << 8) + rbp */ { duk__ivalue_toplain(comp_ctx, left); duk__expr_toplain(comp_ctx, res, args & 0xff /*rbp_flags*/); /* combine left->x1 and res->x1 (right->x1, really) -> (left->x1 OP res->x1) */ DUK_ASSERT(left->t == DUK_IVAL_PLAIN); DUK_ASSERT(res->t == DUK_IVAL_PLAIN); res->t = DUK_IVAL_ARITH; res->op = (args >> 8) & 0xff; res->x2.t = res->x1.t; res->x2.regconst = res->x1.regconst; duk_copy(thr, res->x1.valstack_idx, res->x2.valstack_idx); res->x1.t = left->x1.t; res->x1.regconst = left->x1.regconst; duk_copy(thr, left->x1.valstack_idx, res->x1.valstack_idx); DUK_DDD(DUK_DDDPRINT("binary op, res: t=%ld, x1.t=%ld, x1.regconst=0x%08lx, x2.t=%ld, x2.regconst=0x%08lx", (long) res->t, (long) res->x1.t, (unsigned long) res->x1.regconst, (long) res->x2.t, (unsigned long) res->x2.regconst)); return; } binary_logical: /* * Shared handling for logical AND and logical OR. * * args = (truthval << 8) + rbp * * Truthval determines when to skip right-hand-side. * For logical AND truthval=1, for logical OR truthval=0. * * See doc/compiler.rst for discussion on compiling logical * AND and OR expressions. The approach here is very simplistic, * generating extra jumps and multiple evaluations of truth values, * but generates code on-the-fly with only local back-patching. * * Both logical AND and OR are syntactically left-associated. * However, logical ANDs are compiled as right associative * expressions, i.e. "A && B && C" as "A && (B && C)", to allow * skip jumps to skip over the entire tail. Similarly for logical OR. */ { duk_regconst_t reg_temp; duk_int_t pc_jump; duk_small_uint_t args_truthval = args >> 8; duk_small_uint_t args_rbp = args & 0xff; /* XXX: unoptimal use of temps, resetting */ reg_temp = DUK__ALLOCTEMP(comp_ctx); duk__ivalue_toforcedreg(comp_ctx, left, reg_temp); DUK_ASSERT(DUK__ISREG(reg_temp)); duk__emit_bc(comp_ctx, (args_truthval ? DUK_OP_IFTRUE_R : DUK_OP_IFFALSE_R), reg_temp); /* skip jump conditionally */ pc_jump = duk__emit_jump_empty(comp_ctx); duk__expr_toforcedreg(comp_ctx, res, args_rbp /*rbp_flags*/, reg_temp /*forced_reg*/); duk__patch_jump_here(comp_ctx, pc_jump); duk__ivalue_regconst(res, reg_temp); return; } assign: /* * Shared assignment expression handling * * args = (opcode << 8) + rbp * * If 'opcode' is DUK_OP_NONE, plain assignment without arithmetic. * Syntactically valid left-hand-side forms which are not accepted as * left-hand-side values (e.g. as in "f() = 1") must NOT cause a * SyntaxError, but rather a run-time ReferenceError. * * When evaluating X = Y, the LHS (X) is conceptually evaluated * to a temporary first. The RHS is then evaluated. Finally, the * is applied to the initial value of RHS (not the value after * RHS evaluation), and written to X. Doing so concretely generates * inefficient code so we'd like to avoid the temporary when possible. * See: https://github.com/svaarala/duktape/pull/992. * * The expression value (final LHS value, written to RHS) is * conceptually copied into a fresh temporary so that it won't * change even if the LHS/RHS values change in outer expressions. * For example, it'd be generally incorrect for the expression value * to be the RHS register binding, unless there's a guarantee that it * won't change during further expression evaluation. Using the * temporary concretely produces inefficient bytecode, so we try to * avoid the extra temporary for some known-to-be-safe cases. * Currently the only safe case we detect is a "top level assignment", * for example "x = y + z;", where the assignment expression value is * ignored. * See: test-dev-assign-expr.js and test-bug-assign-mutate-gh381.js. */ { duk_small_uint_t args_op = args >> 8; duk_small_uint_t args_rbp = args & 0xff; duk_bool_t toplevel_assign; /* XXX: here we need to know if 'left' is left-hand-side compatible. * That information is no longer available from current expr parsing * state; it would need to be carried into the 'left' ivalue or by * some other means. */ /* A top-level assignment is e.g. "x = y;". For these it's safe * to use the RHS as-is as the expression value, even if the RHS * is a reg-bound identifier. The RHS ('res') is right associative * so it has consumed all other assignment level operations; the * only relevant lower binding power construct is comma operator * which will ignore the expression value provided here. Usually * the top level assignment expression value is ignored, but it * is relevant for e.g. eval code. */ toplevel_assign = (comp_ctx->curr_func.nud_count == 1 && /* one token before */ comp_ctx->curr_func.led_count == 1); /* one operator (= assign) */ DUK_DDD(DUK_DDDPRINT("assignment: nud_count=%ld, led_count=%ld, toplevel_assign=%ld", (long) comp_ctx->curr_func.nud_count, (long) comp_ctx->curr_func.led_count, (long) toplevel_assign)); if (left->t == DUK_IVAL_VAR) { duk_hstring *h_varname; duk_regconst_t reg_varbind; duk_regconst_t rc_varname; DUK_ASSERT(left->x1.t == DUK_ISPEC_VALUE); /* LHS is already side effect free */ h_varname = duk_known_hstring(thr, left->x1.valstack_idx); if (duk__hstring_is_eval_or_arguments_in_strict_mode(comp_ctx, h_varname)) { /* E5 Section 11.13.1 (and others for other assignments), step 4. */ goto syntax_error_lvalue; } duk_dup(thr, left->x1.valstack_idx); (void) duk__lookup_lhs(comp_ctx, ®_varbind, &rc_varname); if (args_op == DUK_OP_NONE) { duk__expr(comp_ctx, res, args_rbp /*rbp_flags*/); if (toplevel_assign) { /* Any 'res' will do. */ DUK_DDD(DUK_DDDPRINT("plain assignment, toplevel assign, use as is")); } else { /* 'res' must be a plain ivalue, and not register-bound variable. */ DUK_DDD(DUK_DDDPRINT("plain assignment, not toplevel assign, ensure not a reg-bound identifier")); if (res->t != DUK_IVAL_PLAIN || (res->x1.t == DUK_ISPEC_REGCONST && DUK__ISREG_NOTTEMP(comp_ctx, res->x1.regconst))) { duk__ivalue_totempconst(comp_ctx, res); } } } else { /* For X = Y we need to evaluate the pre-op * value of X before evaluating the RHS: the RHS * can change X, but when we do we must use * the pre-op value. */ duk_regconst_t reg_temp; reg_temp = DUK__ALLOCTEMP(comp_ctx); if (reg_varbind >= 0) { duk_regconst_t reg_res; duk_regconst_t reg_src; duk_int_t pc_temp_load; duk_int_t pc_before_rhs; duk_int_t pc_after_rhs; if (toplevel_assign) { /* 'reg_varbind' is the operation result and can also * become the expression value for top level assignments * such as: "var x; x += y;". */ DUK_DD(DUK_DDPRINT("= expression is top level, write directly to reg_varbind")); reg_res = reg_varbind; } else { /* Not safe to use 'reg_varbind' as assignment expression * value, so go through a temp. */ DUK_DD(DUK_DDPRINT("= expression is not top level, write to reg_temp")); reg_res = reg_temp; /* reg_res should be smallest possible */ reg_temp = DUK__ALLOCTEMP(comp_ctx); } /* Try to optimize X = Y for reg-bound * variables. Detect side-effect free RHS * narrowly by seeing whether it emits code. * If not, rewind the code emitter and overwrite * the unnecessary temp reg load. */ pc_temp_load = duk__get_current_pc(comp_ctx); duk__emit_a_bc(comp_ctx, DUK_OP_LDREG, reg_temp, reg_varbind); pc_before_rhs = duk__get_current_pc(comp_ctx); duk__expr_toregconst(comp_ctx, res, args_rbp /*rbp_flags*/); DUK_ASSERT(res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_REGCONST); pc_after_rhs = duk__get_current_pc(comp_ctx); DUK_DD(DUK_DDPRINT("pc_temp_load=%ld, pc_before_rhs=%ld, pc_after_rhs=%ld", (long) pc_temp_load, (long) pc_before_rhs, (long) pc_after_rhs)); if (pc_after_rhs == pc_before_rhs) { /* Note: if the reg_temp load generated shuffling * instructions, we may need to rewind more than * one instruction, so use explicit PC computation. */ DUK_DD(DUK_DDPRINT("rhs is side effect free, rewind and avoid unnecessary temp for reg-based =")); DUK_BW_ADD_PTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code, (pc_temp_load - pc_before_rhs) * (duk_int_t) sizeof(duk_compiler_instr)); reg_src = reg_varbind; } else { DUK_DD(DUK_DDPRINT("rhs evaluation emitted code, not sure if rhs is side effect free; use temp reg for LHS")); reg_src = reg_temp; } duk__emit_a_b_c(comp_ctx, args_op | DUK__EMIT_FLAG_BC_REGCONST, reg_res, reg_src, res->x1.regconst); res->x1.regconst = reg_res; /* Ensure compact use of temps. */ if (DUK__ISREG_TEMP(comp_ctx, reg_res)) { DUK__SETTEMP(comp_ctx, reg_res + 1); } } else { /* When LHS is not register bound, always go through a * temporary. No optimization for top level assignment. */ duk__emit_a_bc(comp_ctx, DUK_OP_GETVAR, reg_temp, rc_varname); duk__expr_toregconst(comp_ctx, res, args_rbp /*rbp_flags*/); DUK_ASSERT(res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_REGCONST); duk__emit_a_b_c(comp_ctx, args_op | DUK__EMIT_FLAG_BC_REGCONST, reg_temp, reg_temp, res->x1.regconst); res->x1.regconst = reg_temp; } DUK_ASSERT(res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_REGCONST); } /* At this point 'res' holds the potential expression value. * It can be basically any ivalue here, including a reg-bound * identifier (if code above deems it safe) or a unary/binary * operation. Operations must be resolved to a side effect free * plain value, and the side effects must happen exactly once. */ if (reg_varbind >= 0) { if (res->t != DUK_IVAL_PLAIN) { /* Resolve 'res' directly into the LHS binding, and use * that as the expression value if safe. If not safe, * resolve to a temp/const and copy to LHS. */ if (toplevel_assign) { duk__ivalue_toforcedreg(comp_ctx, res, (duk_int_t) reg_varbind); } else { duk__ivalue_totempconst(comp_ctx, res); duk__copy_ivalue(comp_ctx, res, left); /* use 'left' as a temp */ duk__ivalue_toforcedreg(comp_ctx, left, (duk_int_t) reg_varbind); } } else { /* Use 'res' as the expression value (it's side effect * free and may be a plain value, a register, or a * constant) and write it to the LHS binding too. */ duk__copy_ivalue(comp_ctx, res, left); /* use 'left' as a temp */ duk__ivalue_toforcedreg(comp_ctx, left, (duk_int_t) reg_varbind); } } else { /* Only a reg fits into 'A' so coerce 'res' into a register * for PUTVAR. * * XXX: here the current A/B/C split is suboptimal: we could * just use 9 bits for reg_res (and support constants) and 17 * instead of 18 bits for the varname const index. */ duk__ivalue_toreg(comp_ctx, res); duk__emit_a_bc(comp_ctx, DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE, res->x1.regconst, rc_varname); } /* 'res' contains expression value */ } else if (left->t == DUK_IVAL_PROP) { /* E5 Section 11.13.1 (and others) step 4 never matches for prop writes -> no check */ duk_regconst_t reg_obj; duk_regconst_t rc_key; duk_regconst_t rc_res; duk_regconst_t reg_temp; /* Property access expressions ('a[b]') are critical to correct * LHS evaluation ordering, see test-dev-assign-eval-order*.js. * We must make sure that the LHS target slot (base object and * key) don't change during RHS evaluation. The only concrete * problem is a register reference to a variable-bound register * (i.e., non-temp). Require temp regs for both key and base. * * Don't allow a constant for the object (even for a number * etc), as it goes into the 'A' field of the opcode. */ reg_obj = duk__ispec_toregconst_raw(comp_ctx, &left->x1, -1 /*forced_reg*/, DUK__IVAL_FLAG_REQUIRE_TEMP /*flags*/); rc_key = duk__ispec_toregconst_raw(comp_ctx, &left->x2, -1 /*forced_reg*/, DUK__IVAL_FLAG_REQUIRE_TEMP | DUK__IVAL_FLAG_ALLOW_CONST /*flags*/); /* Evaluate RHS only when LHS is safe. */ if (args_op == DUK_OP_NONE) { duk__expr_toregconst(comp_ctx, res, args_rbp /*rbp_flags*/); DUK_ASSERT(res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_REGCONST); rc_res = res->x1.regconst; } else { reg_temp = DUK__ALLOCTEMP(comp_ctx); duk__emit_a_b_c(comp_ctx, DUK_OP_GETPROP | DUK__EMIT_FLAG_BC_REGCONST, reg_temp, reg_obj, rc_key); duk__expr_toregconst(comp_ctx, res, args_rbp /*rbp_flags*/); DUK_ASSERT(res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_REGCONST); duk__emit_a_b_c(comp_ctx, args_op | DUK__EMIT_FLAG_BC_REGCONST, reg_temp, reg_temp, res->x1.regconst); rc_res = reg_temp; } duk__emit_a_b_c(comp_ctx, DUK_OP_PUTPROP | DUK__EMIT_FLAG_A_IS_SOURCE | DUK__EMIT_FLAG_BC_REGCONST, reg_obj, rc_key, rc_res); duk__ivalue_regconst(res, rc_res); } else { /* No support for lvalues returned from new or function call expressions. * However, these must NOT cause compile-time SyntaxErrors, but run-time * ReferenceErrors. Both left and right sides of the assignment must be * evaluated before throwing a ReferenceError. For instance: * * f() = g(); * * must result in f() being evaluated, then g() being evaluated, and * finally, a ReferenceError being thrown. See E5 Section 11.13.1. */ duk_regconst_t rc_res; /* First evaluate LHS fully to ensure all side effects are out. */ duk__ivalue_toplain_ignore(comp_ctx, left); /* Then evaluate RHS fully (its value becomes the expression value too). * Technically we'd need the side effect safety check here too, but because * we always throw using INVLHS the result doesn't matter. */ rc_res = duk__expr_toregconst(comp_ctx, res, args_rbp /*rbp_flags*/); duk__emit_op_only(comp_ctx, DUK_OP_INVLHS); duk__ivalue_regconst(res, rc_res); } return; } postincdec: { /* * Post-increment/decrement will return the original value as its * result value. However, even that value will be coerced using * ToNumber() which is quite awkward. Specific bytecode opcodes * are used to handle these semantics. * * Note that post increment/decrement has a "no LineTerminator here" * restriction. This is handled by duk__expr_lbp(), which forcibly terminates * the previous expression if a LineTerminator occurs before '++'/'--'. */ duk_regconst_t reg_res; duk_small_uint_t args_op1 = (args >> 8) & 0xff; /* DUK_OP_POSTINCR/DUK_OP_POSTDECR */ duk_small_uint_t args_op2 = args >> 16; /* DUK_OP_POSTINCP_RR/DUK_OP_POSTDECP_RR */ /* Specific assumptions for opcode numbering. */ DUK_ASSERT(DUK_OP_POSTINCR + 4 == DUK_OP_POSTINCV); DUK_ASSERT(DUK_OP_POSTDECR + 4 == DUK_OP_POSTDECV); reg_res = DUK__ALLOCTEMP(comp_ctx); if (left->t == DUK_IVAL_VAR) { duk_hstring *h_varname; duk_regconst_t reg_varbind; duk_regconst_t rc_varname; h_varname = duk_known_hstring(thr, left->x1.valstack_idx); if (duk__hstring_is_eval_or_arguments_in_strict_mode(comp_ctx, h_varname)) { goto syntax_error; } duk_dup(thr, left->x1.valstack_idx); if (duk__lookup_lhs(comp_ctx, ®_varbind, &rc_varname)) { duk__emit_a_bc(comp_ctx, args_op1, /* e.g. DUK_OP_POSTINCR */ reg_res, reg_varbind); } else { duk__emit_a_bc(comp_ctx, args_op1 + 4, /* e.g. DUK_OP_POSTINCV */ reg_res, rc_varname); } DUK_DDD(DUK_DDDPRINT("postincdec to '%!O' -> reg_varbind=%ld, rc_varname=%ld", (duk_heaphdr *) h_varname, (long) reg_varbind, (long) rc_varname)); } else if (left->t == DUK_IVAL_PROP) { duk_regconst_t reg_obj; /* allocate to reg only (not const) */ duk_regconst_t rc_key; reg_obj = duk__ispec_toregconst_raw(comp_ctx, &left->x1, -1 /*forced_reg*/, 0 /*flags*/); /* don't allow const */ rc_key = duk__ispec_toregconst_raw(comp_ctx, &left->x2, -1 /*forced_reg*/, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/); duk__emit_a_b_c(comp_ctx, args_op2 | DUK__EMIT_FLAG_BC_REGCONST, /* e.g. DUK_OP_POSTINCP */ reg_res, reg_obj, rc_key); } else { /* Technically return value is not needed because INVLHS will * unconditially throw a ReferenceError. Coercion is necessary * for proper semantics (consider ToNumber() called for an object). * Use DUK_OP_UNP with a dummy register to get ToNumber(). */ duk__ivalue_toforcedreg(comp_ctx, left, reg_res); duk__emit_bc(comp_ctx, DUK_OP_UNP, reg_res); /* for side effects, result ignored */ duk__emit_op_only(comp_ctx, DUK_OP_INVLHS); } DUK__SETTEMP(comp_ctx, reg_res + 1); duk__ivalue_regconst(res, reg_res); return; } syntax_error: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_EXPRESSION); DUK_WO_NORETURN(return;); syntax_error_lvalue: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_LVALUE); DUK_WO_NORETURN(return;); } DUK_LOCAL duk_small_uint_t duk__expr_lbp(duk_compiler_ctx *comp_ctx) { duk_small_uint_t tok = comp_ctx->curr_token.t; DUK_ASSERT_DISABLE(tok >= DUK_TOK_MINVAL); /* unsigned */ DUK_ASSERT(tok <= DUK_TOK_MAXVAL); DUK_ASSERT(sizeof(duk__token_lbp) == DUK_TOK_MAXVAL + 1); /* XXX: integrate support for this into led() instead? * Similar issue as post-increment/post-decrement. */ /* prevent duk__expr_led() by using a binding power less than anything valid */ if (tok == DUK_TOK_IN && !comp_ctx->curr_func.allow_in) { return 0; } if ((tok == DUK_TOK_DECREMENT || tok == DUK_TOK_INCREMENT) && (comp_ctx->curr_token.lineterm)) { /* '++' or '--' in a post-increment/decrement position, * and a LineTerminator occurs between the operator and * the preceding expression. Force the previous expr * to terminate, in effect treating e.g. "a,b\n++" as * "a,b;++" (= SyntaxError). */ return 0; } return DUK__TOKEN_LBP_GET_BP(duk__token_lbp[tok]); /* format is bit packed */ } /* * Expression parsing. * * Upon entry to 'expr' and its variants, 'curr_tok' is assumed to be the * first token of the expression. Upon exit, 'curr_tok' will be the first * token not part of the expression (e.g. semicolon terminating an expression * statement). */ #define DUK__EXPR_RBP_MASK 0xff #define DUK__EXPR_FLAG_REJECT_IN (1 << 8) /* reject 'in' token (used for for-in) */ #define DUK__EXPR_FLAG_ALLOW_EMPTY (1 << 9) /* allow empty expression */ #define DUK__EXPR_FLAG_REQUIRE_INIT (1 << 10) /* require initializer for var/const */ /* main expression parser function */ DUK_LOCAL void duk__expr(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk_hthread *thr = comp_ctx->thr; duk_ivalue tmp_alloc; /* 'res' is used for "left", and 'tmp' for "right" */ duk_ivalue *tmp = &tmp_alloc; duk_small_uint_t rbp; DUK__RECURSION_INCREASE(comp_ctx, thr); duk_require_stack(thr, DUK__PARSE_EXPR_SLOTS); /* filter out flags from exprtop rbp_flags here to save space */ rbp = rbp_flags & DUK__EXPR_RBP_MASK; DUK_DDD(DUK_DDDPRINT("duk__expr(), rbp_flags=%ld, rbp=%ld, allow_in=%ld, paren_level=%ld", (long) rbp_flags, (long) rbp, (long) comp_ctx->curr_func.allow_in, (long) comp_ctx->curr_func.paren_level)); duk_memzero(&tmp_alloc, sizeof(tmp_alloc)); tmp->x1.valstack_idx = duk_get_top(thr); tmp->x2.valstack_idx = tmp->x1.valstack_idx + 1; duk_push_undefined(thr); duk_push_undefined(thr); /* XXX: where to release temp regs in intermediate expressions? * e.g. 1+2+3 -> don't inflate temp register count when parsing this. * that particular expression temp regs can be forced here. */ /* XXX: increase ctx->expr_tokens here for every consumed token * (this would be a nice statistic)? */ if (comp_ctx->curr_token.t == DUK_TOK_SEMICOLON || comp_ctx->curr_token.t == DUK_TOK_RPAREN) { /* XXX: possibly incorrect handling of empty expression */ DUK_DDD(DUK_DDDPRINT("empty expression")); if (!(rbp_flags & DUK__EXPR_FLAG_ALLOW_EMPTY)) { DUK_ERROR_SYNTAX(thr, DUK_STR_EMPTY_EXPR_NOT_ALLOWED); DUK_WO_NORETURN(return;); } duk_push_undefined(thr); duk__ivalue_plain_fromstack(comp_ctx, res); goto cleanup; } duk__advance(comp_ctx); duk__expr_nud(comp_ctx, res); /* reuse 'res' as 'left' */ while (rbp < duk__expr_lbp(comp_ctx)) { duk__advance(comp_ctx); duk__expr_led(comp_ctx, res, tmp); duk__copy_ivalue(comp_ctx, tmp, res); /* tmp -> res */ } cleanup: /* final result is already in 'res' */ duk_pop_2(thr); DUK__RECURSION_DECREASE(comp_ctx, thr); } DUK_LOCAL void duk__exprtop(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk_hthread *thr = comp_ctx->thr; /* Note: these variables must reside in 'curr_func' instead of the global * context: when parsing function expressions, expression parsing is nested. */ comp_ctx->curr_func.nud_count = 0; comp_ctx->curr_func.led_count = 0; comp_ctx->curr_func.paren_level = 0; comp_ctx->curr_func.expr_lhs = 1; comp_ctx->curr_func.allow_in = (rbp_flags & DUK__EXPR_FLAG_REJECT_IN ? 0 : 1); duk__expr(comp_ctx, res, rbp_flags); if (!(rbp_flags & DUK__EXPR_FLAG_ALLOW_EMPTY) && duk__expr_is_empty(comp_ctx)) { DUK_ERROR_SYNTAX(thr, DUK_STR_EMPTY_EXPR_NOT_ALLOWED); DUK_WO_NORETURN(return;); } } /* A bunch of helpers (for size optimization) that combine duk__expr()/duk__exprtop() * and result conversions. * * Each helper needs at least 2-3 calls to make it worth while to wrap. */ #if 0 /* unused */ DUK_LOCAL duk_regconst_t duk__expr_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk__expr(comp_ctx, res, rbp_flags); return duk__ivalue_toreg(comp_ctx, res); } #endif #if 0 /* unused */ DUK_LOCAL duk_regconst_t duk__expr_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk__expr(comp_ctx, res, rbp_flags); return duk__ivalue_totemp(comp_ctx, res); } #endif DUK_LOCAL void duk__expr_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags, duk_regconst_t forced_reg) { DUK_ASSERT(forced_reg >= 0); duk__expr(comp_ctx, res, rbp_flags); duk__ivalue_toforcedreg(comp_ctx, res, forced_reg); } DUK_LOCAL duk_regconst_t duk__expr_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk__expr(comp_ctx, res, rbp_flags); return duk__ivalue_toregconst(comp_ctx, res); } #if 0 /* unused */ DUK_LOCAL duk_regconst_t duk__expr_totempconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk__expr(comp_ctx, res, rbp_flags); return duk__ivalue_totempconst(comp_ctx, res); } #endif DUK_LOCAL void duk__expr_toplain(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk__expr(comp_ctx, res, rbp_flags); duk__ivalue_toplain(comp_ctx, res); } DUK_LOCAL void duk__expr_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk__expr(comp_ctx, res, rbp_flags); duk__ivalue_toplain_ignore(comp_ctx, res); } DUK_LOCAL duk_regconst_t duk__exprtop_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk__exprtop(comp_ctx, res, rbp_flags); return duk__ivalue_toreg(comp_ctx, res); } #if 0 /* unused */ DUK_LOCAL duk_regconst_t duk__exprtop_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk__exprtop(comp_ctx, res, rbp_flags); return duk__ivalue_totemp(comp_ctx, res); } #endif DUK_LOCAL void duk__exprtop_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags, duk_regconst_t forced_reg) { DUK_ASSERT(forced_reg >= 0); duk__exprtop(comp_ctx, res, rbp_flags); duk__ivalue_toforcedreg(comp_ctx, res, forced_reg); } DUK_LOCAL duk_regconst_t duk__exprtop_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) { duk__exprtop(comp_ctx, res, rbp_flags); return duk__ivalue_toregconst(comp_ctx, res); } #if 0 /* unused */ DUK_LOCAL void duk__exprtop_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *res, int rbp_flags) { duk__exprtop(comp_ctx, res, rbp_flags); duk__ivalue_toplain_ignore(comp_ctx, res); } #endif /* * Parse an individual source element (top level statement) or a statement. * * Handles labeled statements automatically (peeling away labels before * parsing an expression that follows the label(s)). * * Upon entry, 'curr_tok' contains the first token of the statement (parsed * in "allow regexp literal" mode). Upon exit, 'curr_tok' contains the first * token following the statement (if the statement has a terminator, this is * the token after the terminator). */ #define DUK__HAS_VAL (1 << 0) /* stmt has non-empty value */ #define DUK__HAS_TERM (1 << 1) /* stmt has explicit/implicit semicolon terminator */ #define DUK__ALLOW_AUTO_SEMI_ALWAYS (1 << 2) /* allow automatic semicolon even without lineterm (compatibility) */ #define DUK__STILL_PROLOGUE (1 << 3) /* statement does not terminate directive prologue */ #define DUK__IS_TERMINAL (1 << 4) /* statement is guaranteed to be terminal (control doesn't flow to next statement) */ /* Parse a single variable declaration (e.g. "i" or "i=10"). A leading 'var' * has already been eaten. These is no return value in 'res', it is used only * as a temporary. * * When called from 'for-in' statement parser, the initializer expression must * not allow the 'in' token. The caller supply additional expression parsing * flags (like DUK__EXPR_FLAG_REJECT_IN) in 'expr_flags'. * * Finally, out_rc_varname and out_reg_varbind are updated to reflect where * the identifier is bound: * * If register bound: out_reg_varbind >= 0, out_rc_varname == 0 (ignore) * If not register bound: out_reg_varbind < 0, out_rc_varname >= 0 * * These allow the caller to use the variable for further assignment, e.g. * as is done in 'for-in' parsing. */ DUK_LOCAL void duk__parse_var_decl(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t expr_flags, duk_regconst_t *out_reg_varbind, duk_regconst_t *out_rc_varname) { duk_hthread *thr = comp_ctx->thr; duk_hstring *h_varname; duk_regconst_t reg_varbind; duk_regconst_t rc_varname; /* assume 'var' has been eaten */ /* Note: Identifier rejects reserved words */ if (comp_ctx->curr_token.t != DUK_TOK_IDENTIFIER) { goto syntax_error; } h_varname = comp_ctx->curr_token.str1; DUK_ASSERT(h_varname != NULL); /* strict mode restrictions (E5 Section 12.2.1) */ if (duk__hstring_is_eval_or_arguments_in_strict_mode(comp_ctx, h_varname)) { goto syntax_error; } /* register declarations in first pass */ if (comp_ctx->curr_func.in_scanning) { duk_uarridx_t n; DUK_DDD(DUK_DDDPRINT("register variable declaration %!O in pass 1", (duk_heaphdr *) h_varname)); n = (duk_uarridx_t) duk_get_length(thr, comp_ctx->curr_func.decls_idx); duk_push_hstring(thr, h_varname); duk_put_prop_index(thr, comp_ctx->curr_func.decls_idx, n); duk_push_int(thr, DUK_DECL_TYPE_VAR + (0 << 8)); duk_put_prop_index(thr, comp_ctx->curr_func.decls_idx, n + 1); } duk_push_hstring(thr, h_varname); /* push before advancing to keep reachable */ /* register binding lookup is based on varmap (even in first pass) */ duk_dup_top(thr); (void) duk__lookup_lhs(comp_ctx, ®_varbind, &rc_varname); duk__advance(comp_ctx); /* eat identifier */ if (comp_ctx->curr_token.t == DUK_TOK_EQUALSIGN) { duk__advance(comp_ctx); DUK_DDD(DUK_DDDPRINT("vardecl, assign to '%!O' -> reg_varbind=%ld, rc_varname=%ld", (duk_heaphdr *) h_varname, (long) reg_varbind, (long) rc_varname)); duk__exprtop(comp_ctx, res, DUK__BP_COMMA | expr_flags /*rbp_flags*/); /* AssignmentExpression */ if (reg_varbind >= 0) { duk__ivalue_toforcedreg(comp_ctx, res, reg_varbind); } else { duk_regconst_t reg_val; reg_val = duk__ivalue_toreg(comp_ctx, res); duk__emit_a_bc(comp_ctx, DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE, reg_val, rc_varname); } } else { if (expr_flags & DUK__EXPR_FLAG_REQUIRE_INIT) { /* Used for minimal 'const': initializer required. */ goto syntax_error; } } duk_pop(thr); /* pop varname */ *out_rc_varname = rc_varname; *out_reg_varbind = reg_varbind; return; syntax_error: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_VAR_DECLARATION); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__parse_var_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t expr_flags) { duk_regconst_t reg_varbind; duk_regconst_t rc_varname; duk__advance(comp_ctx); /* eat 'var' */ for (;;) { /* rc_varname and reg_varbind are ignored here */ duk__parse_var_decl(comp_ctx, res, 0 | expr_flags, ®_varbind, &rc_varname); if (comp_ctx->curr_token.t != DUK_TOK_COMMA) { break; } duk__advance(comp_ctx); } } DUK_LOCAL void duk__parse_for_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site) { duk_hthread *thr = comp_ctx->thr; duk_int_t pc_v34_lhs; /* start variant 3/4 left-hand-side code (L1 in doc/compiler.rst example) */ duk_regconst_t temp_reset; /* knock back "next temp" to this whenever possible */ duk_regconst_t reg_temps; /* preallocated temporaries (2) for variants 3 and 4 */ DUK_DDD(DUK_DDDPRINT("start parsing a for/for-in statement")); /* Two temporaries are preallocated here for variants 3 and 4 which need * registers which are never clobbered by expressions in the loop * (concretely: for the enumerator object and the next enumerated value). * Variants 1 and 2 "release" these temps. */ reg_temps = DUK__ALLOCTEMPS(comp_ctx, 2); temp_reset = DUK__GETTEMP(comp_ctx); /* * For/for-in main variants are: * * 1. for (ExpressionNoIn_opt; Expression_opt; Expression_opt) Statement * 2. for (var VariableDeclarationNoIn; Expression_opt; Expression_opt) Statement * 3. for (LeftHandSideExpression in Expression) Statement * 4. for (var VariableDeclarationNoIn in Expression) Statement * * Parsing these without arbitrary lookahead or backtracking is relatively * tricky but we manage to do so for now. * * See doc/compiler.rst for a detailed discussion of control flow * issues, evaluation order issues, etc. */ duk__advance(comp_ctx); /* eat 'for' */ duk__advance_expect(comp_ctx, DUK_TOK_LPAREN); DUK_DDD(DUK_DDDPRINT("detecting for/for-in loop variant, pc=%ld", (long) duk__get_current_pc(comp_ctx))); /* a label site has been emitted by duk__parse_stmt() automatically * (it will also emit the ENDLABEL). */ if (comp_ctx->curr_token.t == DUK_TOK_VAR) { /* * Variant 2 or 4 */ duk_regconst_t reg_varbind; /* variable binding register if register-bound (otherwise < 0) */ duk_regconst_t rc_varname; /* variable name reg/const, if variable not register-bound */ duk__advance(comp_ctx); /* eat 'var' */ duk__parse_var_decl(comp_ctx, res, DUK__EXPR_FLAG_REJECT_IN, ®_varbind, &rc_varname); DUK__SETTEMP(comp_ctx, temp_reset); if (comp_ctx->curr_token.t == DUK_TOK_IN) { /* * Variant 4 */ DUK_DDD(DUK_DDDPRINT("detected for variant 4: for (var VariableDeclarationNoIn in Expression) Statement")); pc_v34_lhs = duk__get_current_pc(comp_ctx); /* jump is inserted here */ if (reg_varbind >= 0) { duk__emit_a_bc(comp_ctx, DUK_OP_LDREG, reg_varbind, reg_temps + 0); } else { duk__emit_a_bc(comp_ctx, DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE, reg_temps + 0, rc_varname); } goto parse_3_or_4; } else { /* * Variant 2 */ DUK_DDD(DUK_DDDPRINT("detected for variant 2: for (var VariableDeclarationNoIn; Expression_opt; Expression_opt) Statement")); for (;;) { /* more initializers */ if (comp_ctx->curr_token.t != DUK_TOK_COMMA) { break; } DUK_DDD(DUK_DDDPRINT("variant 2 has another variable initializer")); duk__advance(comp_ctx); /* eat comma */ duk__parse_var_decl(comp_ctx, res, DUK__EXPR_FLAG_REJECT_IN, ®_varbind, &rc_varname); } goto parse_1_or_2; } } else { /* * Variant 1 or 3 */ pc_v34_lhs = duk__get_current_pc(comp_ctx); /* jump is inserted here (variant 3) */ /* Note that duk__exprtop() here can clobber any reg above current temp_next, * so any loop variables (e.g. enumerator) must be "preallocated". */ /* don't coerce yet to a plain value (variant 3 needs special handling) */ duk__exprtop(comp_ctx, res, DUK__BP_FOR_EXPR | DUK__EXPR_FLAG_REJECT_IN | DUK__EXPR_FLAG_ALLOW_EMPTY /*rbp_flags*/); /* Expression */ if (comp_ctx->curr_token.t == DUK_TOK_IN) { /* * Variant 3 */ /* XXX: need to determine LHS type, and check that it is LHS compatible */ DUK_DDD(DUK_DDDPRINT("detected for variant 3: for (LeftHandSideExpression in Expression) Statement")); if (duk__expr_is_empty(comp_ctx)) { goto syntax_error; /* LeftHandSideExpression does not allow empty expression */ } if (res->t == DUK_IVAL_VAR) { duk_regconst_t reg_varbind; duk_regconst_t rc_varname; duk_dup(thr, res->x1.valstack_idx); if (duk__lookup_lhs(comp_ctx, ®_varbind, &rc_varname)) { duk__emit_a_bc(comp_ctx, DUK_OP_LDREG, reg_varbind, reg_temps + 0); } else { duk__emit_a_bc(comp_ctx, DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE, reg_temps + 0, rc_varname); } } else if (res->t == DUK_IVAL_PROP) { /* Don't allow a constant for the object (even for a number etc), as * it goes into the 'A' field of the opcode. */ duk_regconst_t reg_obj; duk_regconst_t rc_key; reg_obj = duk__ispec_toregconst_raw(comp_ctx, &res->x1, -1 /*forced_reg*/, 0 /*flags*/); /* don't allow const */ rc_key = duk__ispec_toregconst_raw(comp_ctx, &res->x2, -1 /*forced_reg*/, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/); duk__emit_a_b_c(comp_ctx, DUK_OP_PUTPROP | DUK__EMIT_FLAG_A_IS_SOURCE | DUK__EMIT_FLAG_BC_REGCONST, reg_obj, rc_key, reg_temps + 0); } else { duk__ivalue_toplain_ignore(comp_ctx, res); /* just in case */ duk__emit_op_only(comp_ctx, DUK_OP_INVLHS); } goto parse_3_or_4; } else { /* * Variant 1 */ DUK_DDD(DUK_DDDPRINT("detected for variant 1: for (ExpressionNoIn_opt; Expression_opt; Expression_opt) Statement")); duk__ivalue_toplain_ignore(comp_ctx, res); goto parse_1_or_2; } } parse_1_or_2: /* * Parse variant 1 or 2. The first part expression (which differs * in the variants) has already been parsed and its code emitted. * * reg_temps + 0: unused * reg_temps + 1: unused */ { duk_regconst_t rc_cond; duk_int_t pc_l1, pc_l2, pc_l3, pc_l4; duk_int_t pc_jumpto_l3, pc_jumpto_l4; duk_bool_t expr_c_empty; DUK_DDD(DUK_DDDPRINT("shared code for parsing variants 1 and 2")); /* "release" preallocated temps since we won't need them */ temp_reset = reg_temps + 0; DUK__SETTEMP(comp_ctx, temp_reset); duk__advance_expect(comp_ctx, DUK_TOK_SEMICOLON); pc_l1 = duk__get_current_pc(comp_ctx); duk__exprtop(comp_ctx, res, DUK__BP_FOR_EXPR | DUK__EXPR_FLAG_ALLOW_EMPTY /*rbp_flags*/); /* Expression_opt */ if (duk__expr_is_empty(comp_ctx)) { /* no need to coerce */ pc_jumpto_l3 = duk__emit_jump_empty(comp_ctx); /* to body */ pc_jumpto_l4 = -1; /* omitted */ } else { rc_cond = duk__ivalue_toregconst(comp_ctx, res); duk__emit_if_false_skip(comp_ctx, rc_cond); pc_jumpto_l3 = duk__emit_jump_empty(comp_ctx); /* to body */ pc_jumpto_l4 = duk__emit_jump_empty(comp_ctx); /* to exit */ } DUK__SETTEMP(comp_ctx, temp_reset); duk__advance_expect(comp_ctx, DUK_TOK_SEMICOLON); pc_l2 = duk__get_current_pc(comp_ctx); duk__exprtop(comp_ctx, res, DUK__BP_FOR_EXPR | DUK__EXPR_FLAG_ALLOW_EMPTY /*rbp_flags*/); /* Expression_opt */ if (duk__expr_is_empty(comp_ctx)) { /* no need to coerce */ expr_c_empty = 1; /* JUMP L1 omitted */ } else { duk__ivalue_toplain_ignore(comp_ctx, res); expr_c_empty = 0; duk__emit_jump(comp_ctx, pc_l1); } DUK__SETTEMP(comp_ctx, temp_reset); comp_ctx->curr_func.allow_regexp_in_adv = 1; duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); /* Allow RegExp as part of next stmt. */ pc_l3 = duk__get_current_pc(comp_ctx); duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/); if (expr_c_empty) { duk__emit_jump(comp_ctx, pc_l1); } else { duk__emit_jump(comp_ctx, pc_l2); } /* temp reset is not necessary after duk__parse_stmt(), which already does it */ pc_l4 = duk__get_current_pc(comp_ctx); DUK_DDD(DUK_DDDPRINT("patching jumps: jumpto_l3: %ld->%ld, jumpto_l4: %ld->%ld, " "break: %ld->%ld, continue: %ld->%ld", (long) pc_jumpto_l3, (long) pc_l3, (long) pc_jumpto_l4, (long) pc_l4, (long) (pc_label_site + 1), (long) pc_l4, (long) (pc_label_site + 2), (long) pc_l2)); duk__patch_jump(comp_ctx, pc_jumpto_l3, pc_l3); duk__patch_jump(comp_ctx, pc_jumpto_l4, pc_l4); duk__patch_jump(comp_ctx, pc_label_site + 1, pc_l4); /* break jump */ duk__patch_jump(comp_ctx, pc_label_site + 2, expr_c_empty ? pc_l1 : pc_l2); /* continue jump */ } goto finished; parse_3_or_4: /* * Parse variant 3 or 4. * * For variant 3 (e.g. "for (A in C) D;") the code for A (except the * final property/variable write) has already been emitted. The first * instruction of that code is at pc_v34_lhs; a JUMP needs to be inserted * there to satisfy control flow needs. * * For variant 4, if the variable declaration had an initializer * (e.g. "for (var A = B in C) D;") the code for the assignment * (B) has already been emitted. * * Variables set before entering here: * * pc_v34_lhs: insert a "JUMP L2" here (see doc/compiler.rst example). * reg_temps + 0: iteration target value (written to LHS) * reg_temps + 1: enumerator object */ { duk_int_t pc_l1, pc_l2, pc_l3, pc_l4, pc_l5; duk_int_t pc_jumpto_l2, pc_jumpto_l3, pc_jumpto_l4, pc_jumpto_l5; duk_regconst_t reg_target; DUK_DDD(DUK_DDDPRINT("shared code for parsing variants 3 and 4, pc_v34_lhs=%ld", (long) pc_v34_lhs)); DUK__SETTEMP(comp_ctx, temp_reset); /* First we need to insert a jump in the middle of previously * emitted code to get the control flow right. No jumps can * cross the position where the jump is inserted. See doc/compiler.rst * for discussion on the intricacies of control flow and side effects * for variants 3 and 4. */ duk__insert_jump_entry(comp_ctx, pc_v34_lhs); pc_jumpto_l2 = pc_v34_lhs; /* inserted jump */ pc_l1 = pc_v34_lhs + 1; /* +1, right after inserted jump */ /* The code for writing reg_temps + 0 to the left hand side has already * been emitted. */ pc_jumpto_l3 = duk__emit_jump_empty(comp_ctx); /* -> loop body */ duk__advance(comp_ctx); /* eat 'in' */ /* Parse enumeration target and initialize enumerator. For 'null' and 'undefined', * INITENUM will creates a 'null' enumerator which works like an empty enumerator * (E5 Section 12.6.4, step 3). Note that INITENUM requires the value to be in a * register (constant not allowed). */ pc_l2 = duk__get_current_pc(comp_ctx); reg_target = duk__exprtop_toreg(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); /* Expression */ duk__emit_b_c(comp_ctx, DUK_OP_INITENUM | DUK__EMIT_FLAG_B_IS_TARGET, reg_temps + 1, reg_target); pc_jumpto_l4 = duk__emit_jump_empty(comp_ctx); DUK__SETTEMP(comp_ctx, temp_reset); comp_ctx->curr_func.allow_regexp_in_adv = 1; duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); /* Allow RegExp as part of next stmt. */ pc_l3 = duk__get_current_pc(comp_ctx); duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/); /* temp reset is not necessary after duk__parse_stmt(), which already does it */ /* NEXTENUM needs a jump slot right after the main opcode. * We need the code emitter to reserve the slot: if there's * target shuffling, the target shuffle opcodes must happen * after the jump slot (for NEXTENUM the shuffle opcodes are * not needed if the enum is finished). */ pc_l4 = duk__get_current_pc(comp_ctx); duk__emit_b_c(comp_ctx, DUK_OP_NEXTENUM | DUK__EMIT_FLAG_B_IS_TARGET | DUK__EMIT_FLAG_RESERVE_JUMPSLOT, reg_temps + 0, reg_temps + 1); pc_jumpto_l5 = comp_ctx->emit_jumpslot_pc; /* NEXTENUM jump slot: executed when enum finished */ duk__emit_jump(comp_ctx, pc_l1); /* jump to next loop, using reg_v34_iter as iterated value */ pc_l5 = duk__get_current_pc(comp_ctx); /* XXX: since the enumerator may be a memory expensive object, * perhaps clear it explicitly here? If so, break jump must * go through this clearing operation. */ DUK_DDD(DUK_DDDPRINT("patching jumps: jumpto_l2: %ld->%ld, jumpto_l3: %ld->%ld, " "jumpto_l4: %ld->%ld, jumpto_l5: %ld->%ld, " "break: %ld->%ld, continue: %ld->%ld", (long) pc_jumpto_l2, (long) pc_l2, (long) pc_jumpto_l3, (long) pc_l3, (long) pc_jumpto_l4, (long) pc_l4, (long) pc_jumpto_l5, (long) pc_l5, (long) (pc_label_site + 1), (long) pc_l5, (long) (pc_label_site + 2), (long) pc_l4)); duk__patch_jump(comp_ctx, pc_jumpto_l2, pc_l2); duk__patch_jump(comp_ctx, pc_jumpto_l3, pc_l3); duk__patch_jump(comp_ctx, pc_jumpto_l4, pc_l4); duk__patch_jump(comp_ctx, pc_jumpto_l5, pc_l5); duk__patch_jump(comp_ctx, pc_label_site + 1, pc_l5); /* break jump */ duk__patch_jump(comp_ctx, pc_label_site + 2, pc_l4); /* continue jump */ } goto finished; finished: DUK_DDD(DUK_DDDPRINT("end parsing a for/for-in statement")); return; syntax_error: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_FOR); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__parse_switch_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site) { duk_hthread *thr = comp_ctx->thr; duk_regconst_t temp_at_loop; duk_regconst_t rc_switch; /* reg/const for switch value */ duk_regconst_t rc_case; /* reg/const for case value */ duk_regconst_t reg_temp; /* general temp register */ duk_int_t pc_prevcase = -1; duk_int_t pc_prevstmt = -1; duk_int_t pc_default = -1; /* -1 == not set, -2 == pending (next statement list) */ /* Note: negative pc values are ignored when patching jumps, so no explicit checks needed */ /* * Switch is pretty complicated because of several conflicting concerns: * * - Want to generate code without an intermediate representation, * i.e., in one go * * - Case selectors are expressions, not values, and may thus e.g. throw * exceptions (which causes evaluation order concerns) * * - Evaluation semantics of case selectors and default clause need to be * carefully implemented to provide correct behavior even with case value * side effects * * - Fall through case and default clauses; avoiding dead JUMPs if case * ends with an unconditional jump (a break or a continue) * * - The same case value may occur multiple times, but evaluation rules * only process the first match before switching to a "propagation" mode * where case values are no longer evaluated * * See E5 Section 12.11. Also see doc/compiler.rst for compilation * discussion. */ duk__advance(comp_ctx); duk__advance_expect(comp_ctx, DUK_TOK_LPAREN); rc_switch = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); /* RegExp mode does not matter. */ duk__advance_expect(comp_ctx, DUK_TOK_LCURLY); DUK_DDD(DUK_DDDPRINT("switch value in register %ld", (long) rc_switch)); temp_at_loop = DUK__GETTEMP(comp_ctx); for (;;) { duk_int_t num_stmts; duk_small_uint_t tok; /* sufficient for keeping temp reg numbers in check */ DUK__SETTEMP(comp_ctx, temp_at_loop); if (comp_ctx->curr_token.t == DUK_TOK_RCURLY) { break; } /* * Parse a case or default clause. */ if (comp_ctx->curr_token.t == DUK_TOK_CASE) { /* * Case clause. * * Note: cannot use reg_case as a temp register (for SEQ target) * because it may be a constant. */ duk__patch_jump_here(comp_ctx, pc_prevcase); /* chain jumps for case * evaluation and checking */ duk__advance(comp_ctx); rc_case = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); duk__advance_expect(comp_ctx, DUK_TOK_COLON); reg_temp = DUK__ALLOCTEMP(comp_ctx); duk__emit_a_b_c(comp_ctx, DUK_OP_SEQ | DUK__EMIT_FLAG_BC_REGCONST, reg_temp, rc_switch, rc_case); duk__emit_if_true_skip(comp_ctx, reg_temp); /* jump to next case clause */ pc_prevcase = duk__emit_jump_empty(comp_ctx); /* no match, next case */ /* statements go here (if any) on next loop */ } else if (comp_ctx->curr_token.t == DUK_TOK_DEFAULT) { /* * Default clause. */ if (pc_default >= 0) { goto syntax_error; } duk__advance(comp_ctx); duk__advance_expect(comp_ctx, DUK_TOK_COLON); /* Fix for https://github.com/svaarala/duktape/issues/155: * If 'default' is first clause (detected by pc_prevcase < 0) * we need to ensure we stay in the matching chain. */ if (pc_prevcase < 0) { DUK_DD(DUK_DDPRINT("default clause is first, emit prevcase jump")); pc_prevcase = duk__emit_jump_empty(comp_ctx); } /* default clause matches next statement list (if any) */ pc_default = -2; } else { /* Code is not accepted before the first case/default clause */ goto syntax_error; } /* * Parse code after the clause. Possible terminators are * 'case', 'default', and '}'. * * Note that there may be no code at all, not even an empty statement, * between case clauses. This must be handled just like an empty statement * (omitting seemingly pointless JUMPs), to avoid situations like * test-bug-case-fallthrough.js. */ num_stmts = 0; if (pc_default == -2) { pc_default = duk__get_current_pc(comp_ctx); } /* Note: this is correct even for default clause statements: * they participate in 'fall-through' behavior even if the * default clause is in the middle. */ duk__patch_jump_here(comp_ctx, pc_prevstmt); /* chain jumps for 'fall-through' * after a case matches. */ for (;;) { tok = comp_ctx->curr_token.t; if (tok == DUK_TOK_CASE || tok == DUK_TOK_DEFAULT || tok == DUK_TOK_RCURLY) { break; } num_stmts++; duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/); } /* fall-through jump to next code of next case (backpatched) */ pc_prevstmt = duk__emit_jump_empty(comp_ctx); /* XXX: would be nice to omit this jump when the jump is not * reachable, at least in the obvious cases (such as the case * ending with a 'break'. * * Perhaps duk__parse_stmt() could provide some info on whether * the statement is a "dead end"? * * If implemented, just set pc_prevstmt to -1 when not needed. */ } DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_RCURLY); comp_ctx->curr_func.allow_regexp_in_adv = 1; duk__advance(comp_ctx); /* Allow RegExp as part of next stmt. */ /* default case control flow patchup; note that if pc_prevcase < 0 * (i.e. no case clauses), control enters default case automatically. */ if (pc_default >= 0) { /* default case exists: go there if no case matches */ duk__patch_jump(comp_ctx, pc_prevcase, pc_default); } else { /* default case does not exist, or no statements present * after default case: finish case evaluation */ duk__patch_jump_here(comp_ctx, pc_prevcase); } /* fall-through control flow patchup; note that pc_prevstmt may be * < 0 (i.e. no case clauses), in which case this is a no-op. */ duk__patch_jump_here(comp_ctx, pc_prevstmt); /* continue jump not patched, an INVALID opcode remains there */ duk__patch_jump_here(comp_ctx, pc_label_site + 1); /* break jump */ /* Note: 'fast' breaks will jump to pc_label_site + 1, which will * then jump here. The double jump will be eliminated by a * peephole pass, resulting in an optimal jump here. The label * site jumps will remain in bytecode and will waste code size. */ return; syntax_error: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_SWITCH); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__parse_if_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_regconst_t temp_reset; duk_regconst_t rc_cond; duk_int_t pc_jump_false; DUK_DDD(DUK_DDDPRINT("begin parsing if statement")); temp_reset = DUK__GETTEMP(comp_ctx); duk__advance(comp_ctx); /* eat 'if' */ duk__advance_expect(comp_ctx, DUK_TOK_LPAREN); rc_cond = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); duk__emit_if_true_skip(comp_ctx, rc_cond); pc_jump_false = duk__emit_jump_empty(comp_ctx); /* jump to end or else part */ DUK__SETTEMP(comp_ctx, temp_reset); comp_ctx->curr_func.allow_regexp_in_adv = 1; duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); /* Allow RegExp as part of next stmt. */ duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/); /* The 'else' ambiguity is resolved by 'else' binding to the innermost * construct, so greedy matching is correct here. */ if (comp_ctx->curr_token.t == DUK_TOK_ELSE) { duk_int_t pc_jump_end; DUK_DDD(DUK_DDDPRINT("if has else part")); duk__advance(comp_ctx); pc_jump_end = duk__emit_jump_empty(comp_ctx); /* jump from true part to end */ duk__patch_jump_here(comp_ctx, pc_jump_false); duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/); duk__patch_jump_here(comp_ctx, pc_jump_end); } else { DUK_DDD(DUK_DDDPRINT("if does not have else part")); duk__patch_jump_here(comp_ctx, pc_jump_false); } DUK_DDD(DUK_DDDPRINT("end parsing if statement")); } DUK_LOCAL void duk__parse_do_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site) { duk_regconst_t rc_cond; duk_int_t pc_start; DUK_DDD(DUK_DDDPRINT("begin parsing do statement")); duk__advance(comp_ctx); /* Eat 'do'; allow RegExp as part of next stmt. */ pc_start = duk__get_current_pc(comp_ctx); duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/); duk__patch_jump_here(comp_ctx, pc_label_site + 2); /* continue jump */ duk__advance_expect(comp_ctx, DUK_TOK_WHILE); duk__advance_expect(comp_ctx, DUK_TOK_LPAREN); rc_cond = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); duk__emit_if_false_skip(comp_ctx, rc_cond); duk__emit_jump(comp_ctx, pc_start); /* no need to reset temps, as we're finished emitting code */ comp_ctx->curr_func.allow_regexp_in_adv = 1; /* Allow RegExp as part of next stmt. */ duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); duk__patch_jump_here(comp_ctx, pc_label_site + 1); /* break jump */ DUK_DDD(DUK_DDDPRINT("end parsing do statement")); } DUK_LOCAL void duk__parse_while_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site) { duk_regconst_t temp_reset; duk_regconst_t rc_cond; duk_int_t pc_start; duk_int_t pc_jump_false; DUK_DDD(DUK_DDDPRINT("begin parsing while statement")); temp_reset = DUK__GETTEMP(comp_ctx); duk__advance(comp_ctx); /* eat 'while' */ duk__advance_expect(comp_ctx, DUK_TOK_LPAREN); pc_start = duk__get_current_pc(comp_ctx); duk__patch_jump_here(comp_ctx, pc_label_site + 2); /* continue jump */ rc_cond = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); duk__emit_if_true_skip(comp_ctx, rc_cond); pc_jump_false = duk__emit_jump_empty(comp_ctx); DUK__SETTEMP(comp_ctx, temp_reset); comp_ctx->curr_func.allow_regexp_in_adv = 1; duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); /* Allow RegExp as part of next stmt. */ duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/); duk__emit_jump(comp_ctx, pc_start); duk__patch_jump_here(comp_ctx, pc_jump_false); duk__patch_jump_here(comp_ctx, pc_label_site + 1); /* break jump */ DUK_DDD(DUK_DDDPRINT("end parsing while statement")); } DUK_LOCAL void duk__parse_break_or_continue_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_hthread *thr = comp_ctx->thr; duk_bool_t is_break = (comp_ctx->curr_token.t == DUK_TOK_BREAK); duk_int_t label_id; duk_int_t label_catch_depth; duk_int_t label_pc; /* points to LABEL; pc+1 = jump site for break; pc+2 = jump site for continue */ duk_bool_t label_is_closest; DUK_UNREF(res); duk__advance(comp_ctx); /* eat 'break' or 'continue' */ if (comp_ctx->curr_token.t == DUK_TOK_SEMICOLON || /* explicit semi follows */ comp_ctx->curr_token.lineterm || /* automatic semi will be inserted */ comp_ctx->curr_token.allow_auto_semi) { /* automatic semi will be inserted */ /* break/continue without label */ duk__lookup_active_label(comp_ctx, DUK_HTHREAD_STRING_EMPTY_STRING(thr), is_break, &label_id, &label_catch_depth, &label_pc, &label_is_closest); } else if (comp_ctx->curr_token.t == DUK_TOK_IDENTIFIER) { /* break/continue with label (label cannot be a reserved word, production is 'Identifier' */ DUK_ASSERT(comp_ctx->curr_token.str1 != NULL); duk__lookup_active_label(comp_ctx, comp_ctx->curr_token.str1, is_break, &label_id, &label_catch_depth, &label_pc, &label_is_closest); duk__advance(comp_ctx); } else { DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_BREAK_CONT_LABEL); DUK_WO_NORETURN(return;); } /* Use a fast break/continue when possible. A fast break/continue is * just a jump to the LABEL break/continue jump slot, which then jumps * to an appropriate place (for break, going through ENDLABEL correctly). * The peephole optimizer will optimize the jump to a direct one. */ if (label_catch_depth == comp_ctx->curr_func.catch_depth && label_is_closest) { DUK_DDD(DUK_DDDPRINT("break/continue: is_break=%ld, label_id=%ld, label_is_closest=%ld, " "label_catch_depth=%ld, catch_depth=%ld " "-> use fast variant (direct jump)", (long) is_break, (long) label_id, (long) label_is_closest, (long) label_catch_depth, (long) comp_ctx->curr_func.catch_depth)); duk__emit_jump(comp_ctx, label_pc + (is_break ? 1 : 2)); } else { DUK_DDD(DUK_DDDPRINT("break/continue: is_break=%ld, label_id=%ld, label_is_closest=%ld, " "label_catch_depth=%ld, catch_depth=%ld " "-> use slow variant (longjmp)", (long) is_break, (long) label_id, (long) label_is_closest, (long) label_catch_depth, (long) comp_ctx->curr_func.catch_depth)); duk__emit_bc(comp_ctx, is_break ? DUK_OP_BREAK : DUK_OP_CONTINUE, (duk_regconst_t) label_id); } } DUK_LOCAL void duk__parse_return_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_hthread *thr = comp_ctx->thr; duk_regconst_t rc_val; duk__advance(comp_ctx); /* eat 'return' */ /* A 'return' statement is only allowed inside an actual function body, * not as part of eval or global code. */ if (!comp_ctx->curr_func.is_function) { DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_RETURN); DUK_WO_NORETURN(return;); } if (comp_ctx->curr_token.t == DUK_TOK_SEMICOLON || /* explicit semi follows */ comp_ctx->curr_token.lineterm || /* automatic semi will be inserted */ comp_ctx->curr_token.allow_auto_semi) { /* automatic semi will be inserted */ DUK_DDD(DUK_DDDPRINT("empty return value -> undefined")); duk__emit_op_only(comp_ctx, DUK_OP_RETUNDEF); } else { duk_int_t pc_before_expr; duk_int_t pc_after_expr; DUK_DDD(DUK_DDDPRINT("return with a value")); DUK_UNREF(pc_before_expr); DUK_UNREF(pc_after_expr); pc_before_expr = duk__get_current_pc(comp_ctx); rc_val = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); pc_after_expr = duk__get_current_pc(comp_ctx); /* Tail call check: if last opcode emitted was CALL, and * the context allows it, add a tailcall flag to the CALL. * This doesn't guarantee that a tail call will be allowed at * runtime, so the RETURN must still be emitted. (Duktape * 0.10.0 avoided this and simulated a RETURN if a tail call * couldn't be used at runtime; but this didn't work * correctly with a thread yield/resume, see * test-bug-tailcall-thread-yield-resume.js for discussion.) * * In addition to the last opcode being CALL, we also need to * be sure that 'rc_val' is the result register of the CALL. * For instance, for the expression 'return 0, (function () * { return 1; }), 2' the last opcode emitted is CALL (no * bytecode is emitted for '2') but 'rc_val' indicates * constant '2'. Similarly if '2' is replaced by a register * bound variable, no opcodes are emitted but tail call would * be incorrect. * * This is tricky and easy to get wrong. It would be best to * track enough expression metadata to check that 'rc_val' came * from that last CALL instruction. We don't have that metadata * now, so we check that 'rc_val' is a temporary register result * (not a constant or a register bound variable). There should * be no way currently for 'rc_val' to be a temporary for an * expression following the CALL instruction without emitting * some opcodes following the CALL. This proxy check is used * below. * * See: test-bug-comma-expr-gh131.js. * * The non-standard 'caller' property disables tail calls * because they pose some special cases which haven't been * fixed yet. */ #if defined(DUK_USE_TAILCALL) if (comp_ctx->curr_func.catch_depth == 0 && /* no catchers */ pc_after_expr > pc_before_expr) { /* at least one opcode emitted */ duk_compiler_instr *instr; duk_instr_t ins; duk_small_uint_t op; instr = duk__get_instr_ptr(comp_ctx, pc_after_expr - 1); DUK_ASSERT(instr != NULL); ins = instr->ins; op = (duk_small_uint_t) DUK_DEC_OP(ins); if ((op & ~0x0fU) == DUK_OP_CALL0 && DUK__ISREG_TEMP(comp_ctx, rc_val) /* see above */) { DUK_DDD(DUK_DDDPRINT("return statement detected a tail call opportunity: " "catch depth is 0, duk__exprtop() emitted >= 1 instructions, " "and last instruction is a CALL " "-> change to TAILCALL")); ins |= DUK_ENC_OP(DUK_BC_CALL_FLAG_TAILCALL); instr->ins = ins; } } #endif /* DUK_USE_TAILCALL */ if (DUK__ISREG(rc_val)) { duk__emit_bc(comp_ctx, DUK_OP_RETREG, rc_val); } else { rc_val = DUK__REMOVECONST(rc_val); if (duk__const_needs_refcount(comp_ctx, rc_val)) { duk__emit_bc(comp_ctx, DUK_OP_RETCONST, rc_val); } else { duk__emit_bc(comp_ctx, DUK_OP_RETCONSTN, rc_val); } } } } DUK_LOCAL void duk__parse_throw_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_regconst_t reg_val; duk__advance(comp_ctx); /* eat 'throw' */ /* Unlike break/continue, throw statement does not allow an empty value. */ if (comp_ctx->curr_token.lineterm) { DUK_ERROR_SYNTAX(comp_ctx->thr, DUK_STR_INVALID_THROW); DUK_WO_NORETURN(return;); } reg_val = duk__exprtop_toreg(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); duk__emit_bc(comp_ctx, DUK_OP_THROW, reg_val); } DUK_LOCAL void duk__parse_try_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_hthread *thr = comp_ctx->thr; duk_regconst_t reg_catch; /* reg_catch+0 and reg_catch+1 are reserved for TRYCATCH */ duk_regconst_t rc_varname = 0; duk_small_uint_t trycatch_flags = 0; duk_int_t pc_ldconst = -1; duk_int_t pc_trycatch = -1; duk_int_t pc_catch = -1; duk_int_t pc_finally = -1; DUK_UNREF(res); /* * See the following documentation for discussion: * * doc/execution.rst: control flow details * * Try, catch, and finally "parts" are Blocks, not Statements, so * they must always be delimited by curly braces. This is unlike e.g. * the if statement, which accepts any Statement. This eliminates any * questions of matching parts of nested try statements. The Block * parsing is implemented inline here (instead of calling out). * * Finally part has a 'let scoped' variable, which requires a few kinks * here. */ comp_ctx->curr_func.catch_depth++; duk__advance(comp_ctx); /* eat 'try' */ reg_catch = DUK__ALLOCTEMPS(comp_ctx, 2); /* The target for this LDCONST may need output shuffling, but we assume * that 'pc_ldconst' will be the LDCONST that we can patch later. This * should be the case because there's no input shuffling. (If there's * no catch clause, this LDCONST will be replaced with a NOP.) */ pc_ldconst = duk__get_current_pc(comp_ctx); duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, reg_catch, 0 /*patched later*/); pc_trycatch = duk__get_current_pc(comp_ctx); duk__emit_invalid(comp_ctx); /* TRYCATCH, cannot emit now (not enough info) */ duk__emit_invalid(comp_ctx); /* jump for 'catch' case */ duk__emit_invalid(comp_ctx); /* jump for 'finally' case or end (if no finally) */ /* try part */ duk__advance_expect(comp_ctx, DUK_TOK_LCURLY); duk__parse_stmts(comp_ctx, 0 /*allow_source_elem*/, 0 /*expect_eof*/, 1 /*regexp_after*/); /* the DUK_TOK_RCURLY is eaten by duk__parse_stmts() */ duk__emit_op_only(comp_ctx, DUK_OP_ENDTRY); if (comp_ctx->curr_token.t == DUK_TOK_CATCH) { /* * The catch variable must be updated to reflect the new allocated * register for the duration of the catch clause. We need to store * and restore the original value for the varmap entry (if any). */ /* * Note: currently register bindings must be fixed for the entire * function. So, even though the catch variable is in a register * we know, we must use an explicit environment record and slow path * accesses to read/write the catch binding to make closures created * within the catch clause work correctly. This restriction should * be fixable (at least in common cases) later. * * See: test-bug-catch-binding-2.js. * * XXX: improve to get fast path access to most catch clauses. */ duk_hstring *h_var; duk_int_t varmap_value; /* for storing/restoring the varmap binding for catch variable */ DUK_DDD(DUK_DDDPRINT("stack top at start of catch clause: %ld", (long) duk_get_top(thr))); trycatch_flags |= DUK_BC_TRYCATCH_FLAG_HAVE_CATCH; pc_catch = duk__get_current_pc(comp_ctx); duk__advance(comp_ctx); duk__advance_expect(comp_ctx, DUK_TOK_LPAREN); if (comp_ctx->curr_token.t != DUK_TOK_IDENTIFIER) { /* Identifier, i.e. don't allow reserved words */ goto syntax_error; } h_var = comp_ctx->curr_token.str1; DUK_ASSERT(h_var != NULL); duk_push_hstring(thr, h_var); /* keep in on valstack, use borrowed ref below */ if (comp_ctx->curr_func.is_strict && ((h_var == DUK_HTHREAD_STRING_EVAL(thr)) || (h_var == DUK_HTHREAD_STRING_LC_ARGUMENTS(thr)))) { DUK_DDD(DUK_DDDPRINT("catch identifier 'eval' or 'arguments' in strict mode -> SyntaxError")); goto syntax_error; } duk_dup_top(thr); rc_varname = duk__getconst(comp_ctx); DUK_DDD(DUK_DDDPRINT("catch clause, rc_varname=0x%08lx (%ld)", (unsigned long) rc_varname, (long) rc_varname)); duk__advance(comp_ctx); duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); duk__advance_expect(comp_ctx, DUK_TOK_LCURLY); DUK_DDD(DUK_DDDPRINT("varmap before modifying for catch clause: %!iT", (duk_tval *) duk_get_tval(thr, comp_ctx->curr_func.varmap_idx))); duk_dup_top(thr); duk_get_prop(thr, comp_ctx->curr_func.varmap_idx); if (duk_is_undefined(thr, -1)) { varmap_value = -2; } else if (duk_is_null(thr, -1)) { varmap_value = -1; } else { DUK_ASSERT(duk_is_number(thr, -1)); varmap_value = duk_get_int(thr, -1); DUK_ASSERT(varmap_value >= 0); } duk_pop(thr); #if 0 /* It'd be nice to do something like this - but it doesn't * work for closures created inside the catch clause. */ duk_dup_top(thr); duk_push_int(thr, (duk_int_t) (reg_catch + 0)); duk_put_prop(thr, comp_ctx->curr_func.varmap_idx); #endif duk_dup_top(thr); duk_push_null(thr); duk_put_prop(thr, comp_ctx->curr_func.varmap_idx); duk__emit_a_bc(comp_ctx, DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE, reg_catch + 0 /*value*/, rc_varname /*varname*/); DUK_DDD(DUK_DDDPRINT("varmap before parsing catch clause: %!iT", (duk_tval *) duk_get_tval(thr, comp_ctx->curr_func.varmap_idx))); duk__parse_stmts(comp_ctx, 0 /*allow_source_elem*/, 0 /*expect_eof*/, 1 /*regexp_after*/); /* the DUK_TOK_RCURLY is eaten by duk__parse_stmts() */ if (varmap_value == -2) { /* not present */ duk_del_prop(thr, comp_ctx->curr_func.varmap_idx); } else { if (varmap_value == -1) { duk_push_null(thr); } else { DUK_ASSERT(varmap_value >= 0); duk_push_int(thr, varmap_value); } duk_put_prop(thr, comp_ctx->curr_func.varmap_idx); } /* varname is popped by above code */ DUK_DDD(DUK_DDDPRINT("varmap after restore catch clause: %!iT", (duk_tval *) duk_get_tval(thr, comp_ctx->curr_func.varmap_idx))); duk__emit_op_only(comp_ctx, DUK_OP_ENDCATCH); /* * XXX: for now, indicate that an expensive catch binding * declarative environment is always needed. If we don't * need it, we don't need the const_varname either. */ trycatch_flags |= DUK_BC_TRYCATCH_FLAG_CATCH_BINDING; DUK_DDD(DUK_DDDPRINT("stack top at end of catch clause: %ld", (long) duk_get_top(thr))); } if (comp_ctx->curr_token.t == DUK_TOK_FINALLY) { trycatch_flags |= DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY; pc_finally = duk__get_current_pc(comp_ctx); duk__advance(comp_ctx); duk__advance_expect(comp_ctx, DUK_TOK_LCURLY); duk__parse_stmts(comp_ctx, 0 /*allow_source_elem*/, 0 /*expect_eof*/, 1 /*regexp_after*/); /* the DUK_TOK_RCURLY is eaten by duk__parse_stmts() */ duk__emit_abc(comp_ctx, DUK_OP_ENDFIN, reg_catch); /* rethrow */ } if (!(trycatch_flags & DUK_BC_TRYCATCH_FLAG_HAVE_CATCH) && !(trycatch_flags & DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY)) { /* must have catch and/or finally */ goto syntax_error; } /* If there's no catch block, rc_varname will be 0 and duk__patch_trycatch() * will replace the LDCONST with a NOP. For any actual constant (including * constant 0) the DUK__CONST_MARKER flag will be set in rc_varname. */ duk__patch_trycatch(comp_ctx, pc_ldconst, pc_trycatch, reg_catch, rc_varname, trycatch_flags); if (trycatch_flags & DUK_BC_TRYCATCH_FLAG_HAVE_CATCH) { DUK_ASSERT(pc_catch >= 0); duk__patch_jump(comp_ctx, pc_trycatch + 1, pc_catch); } if (trycatch_flags & DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY) { DUK_ASSERT(pc_finally >= 0); duk__patch_jump(comp_ctx, pc_trycatch + 2, pc_finally); } else { /* without finally, the second jump slot is used to jump to end of stmt */ duk__patch_jump_here(comp_ctx, pc_trycatch + 2); } comp_ctx->curr_func.catch_depth--; return; syntax_error: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_TRY); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__parse_with_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) { duk_int_t pc_trycatch; duk_int_t pc_finished; duk_regconst_t reg_catch; duk_small_uint_t trycatch_flags; if (comp_ctx->curr_func.is_strict) { DUK_ERROR_SYNTAX(comp_ctx->thr, DUK_STR_WITH_IN_STRICT_MODE); DUK_WO_NORETURN(return;); } comp_ctx->curr_func.catch_depth++; duk__advance(comp_ctx); /* eat 'with' */ reg_catch = DUK__ALLOCTEMPS(comp_ctx, 2); duk__advance_expect(comp_ctx, DUK_TOK_LPAREN); duk__exprtop_toforcedreg(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/, reg_catch); comp_ctx->curr_func.allow_regexp_in_adv = 1; duk__advance_expect(comp_ctx, DUK_TOK_RPAREN); /* Allow RegExp as part of next stmt. */ pc_trycatch = duk__get_current_pc(comp_ctx); trycatch_flags = DUK_BC_TRYCATCH_FLAG_WITH_BINDING; duk__emit_a_bc(comp_ctx, DUK_OP_TRYCATCH | DUK__EMIT_FLAG_NO_SHUFFLE_A, (duk_regconst_t) trycatch_flags /*a*/, reg_catch /*bc*/); duk__emit_invalid(comp_ctx); /* catch jump */ duk__emit_invalid(comp_ctx); /* finished jump */ duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/); duk__emit_op_only(comp_ctx, DUK_OP_ENDTRY); pc_finished = duk__get_current_pc(comp_ctx); duk__patch_jump(comp_ctx, pc_trycatch + 2, pc_finished); comp_ctx->curr_func.catch_depth--; } DUK_LOCAL duk_int_t duk__stmt_label_site(duk_compiler_ctx *comp_ctx, duk_int_t label_id) { /* if a site already exists, nop: max one label site per statement */ if (label_id >= 0) { return label_id; } label_id = comp_ctx->curr_func.label_next++; DUK_DDD(DUK_DDDPRINT("allocated new label id for label site: %ld", (long) label_id)); duk__emit_bc(comp_ctx, DUK_OP_LABEL, (duk_regconst_t) label_id); duk__emit_invalid(comp_ctx); duk__emit_invalid(comp_ctx); return label_id; } /* Parse a single statement. * * Creates a label site (with an empty label) automatically for iteration * statements. Also "peels off" any label statements for explicit labels. */ DUK_LOCAL void duk__parse_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_bool_t allow_source_elem) { duk_hthread *thr = comp_ctx->thr; duk_bool_t dir_prol_at_entry; /* directive prologue status at entry */ duk_regconst_t temp_at_entry; duk_size_t labels_len_at_entry; duk_int_t pc_at_entry; /* assumed to also be PC of "LABEL" */ duk_int_t stmt_id; duk_small_uint_t stmt_flags = 0; duk_int_t label_id = -1; duk_small_uint_t tok; duk_bool_t test_func_decl; DUK__RECURSION_INCREASE(comp_ctx, thr); temp_at_entry = DUK__GETTEMP(comp_ctx); pc_at_entry = duk__get_current_pc(comp_ctx); labels_len_at_entry = duk_get_length(thr, comp_ctx->curr_func.labelnames_idx); stmt_id = comp_ctx->curr_func.stmt_next++; dir_prol_at_entry = comp_ctx->curr_func.in_directive_prologue; DUK_UNREF(stmt_id); DUK_DDD(DUK_DDDPRINT("parsing a statement, stmt_id=%ld, temp_at_entry=%ld, labels_len_at_entry=%ld, " "is_strict=%ld, in_directive_prologue=%ld, catch_depth=%ld", (long) stmt_id, (long) temp_at_entry, (long) labels_len_at_entry, (long) comp_ctx->curr_func.is_strict, (long) comp_ctx->curr_func.in_directive_prologue, (long) comp_ctx->curr_func.catch_depth)); /* The directive prologue flag is cleared by default so that it is * unset for any recursive statement parsing. It is only "revived" * if a directive is detected. (We could also make directives only * allowed if 'allow_source_elem' was true.) */ comp_ctx->curr_func.in_directive_prologue = 0; retry_parse: DUK_DDD(DUK_DDDPRINT("try stmt parse, stmt_id=%ld, label_id=%ld, allow_source_elem=%ld, catch_depth=%ld", (long) stmt_id, (long) label_id, (long) allow_source_elem, (long) comp_ctx->curr_func.catch_depth)); /* * Detect iteration statements; if encountered, establish an * empty label. */ tok = comp_ctx->curr_token.t; if (tok == DUK_TOK_FOR || tok == DUK_TOK_DO || tok == DUK_TOK_WHILE || tok == DUK_TOK_SWITCH) { DUK_DDD(DUK_DDDPRINT("iteration/switch statement -> add empty label")); label_id = duk__stmt_label_site(comp_ctx, label_id); duk__add_label(comp_ctx, DUK_HTHREAD_STRING_EMPTY_STRING(thr), pc_at_entry /*pc_label*/, label_id); } /* * Main switch for statement / source element type. */ switch (comp_ctx->curr_token.t) { case DUK_TOK_FUNCTION: { /* * Function declaration, function expression, or (non-standard) * function statement. * * The E5 specification only allows function declarations at * the top level (in "source elements"). An ExpressionStatement * is explicitly not allowed to begin with a "function" keyword * (E5 Section 12.4). Hence any non-error semantics for such * non-top-level statements are non-standard. Duktape semantics * for function statements are modelled after V8, see * test-dev-func-decl-outside-top.js. */ test_func_decl = allow_source_elem; #if defined(DUK_USE_NONSTD_FUNC_STMT) /* Lenient: allow function declarations outside top level in * non-strict mode but reject them in strict mode. */ test_func_decl = test_func_decl || !comp_ctx->curr_func.is_strict; #endif /* DUK_USE_NONSTD_FUNC_STMT */ /* Strict: never allow function declarations outside top level. */ if (test_func_decl) { /* FunctionDeclaration: not strictly a statement but handled as such. * * O(depth^2) parse count for inner functions is handled by recording a * lexer offset on the first compilation pass, so that the function can * be efficiently skipped on the second pass. This is encapsulated into * duk__parse_func_like_fnum(). */ duk_int_t fnum; #if defined(DUK_USE_ASSERTIONS) duk_idx_t top_before; #endif DUK_DDD(DUK_DDDPRINT("function declaration statement")); #if defined(DUK_USE_ASSERTIONS) top_before = duk_get_top(thr); #endif duk__advance(comp_ctx); /* eat 'function' */ fnum = duk__parse_func_like_fnum(comp_ctx, DUK__FUNC_FLAG_DECL | DUK__FUNC_FLAG_PUSHNAME_PASS1); /* The value stack convention here is a bit odd: the function * name is only pushed on pass 1 (in_scanning), and is needed * to process function declarations. */ if (comp_ctx->curr_func.in_scanning) { duk_uarridx_t n; #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(duk_get_top(thr) == top_before + 1); #endif DUK_DDD(DUK_DDDPRINT("register function declaration %!T in pass 1, fnum %ld", duk_get_tval(thr, -1), (long) fnum)); n = (duk_uarridx_t) duk_get_length(thr, comp_ctx->curr_func.decls_idx); /* funcname is at index -1 */ duk_put_prop_index(thr, comp_ctx->curr_func.decls_idx, n); duk_push_int(thr, (duk_int_t) (DUK_DECL_TYPE_FUNC + (fnum << 8))); duk_put_prop_index(thr, comp_ctx->curr_func.decls_idx, n + 1); } else { #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(duk_get_top(thr) == top_before); #endif } /* no statement value (unlike function expression) */ stmt_flags = 0; break; } else { DUK_ERROR_SYNTAX(thr, DUK_STR_FUNC_STMT_NOT_ALLOWED); DUK_WO_NORETURN(return;); } break; } case DUK_TOK_LCURLY: { DUK_DDD(DUK_DDDPRINT("block statement")); duk__advance(comp_ctx); duk__parse_stmts(comp_ctx, 0 /*allow_source_elem*/, 0 /*expect_eof*/, 1 /*regexp_after*/); /* the DUK_TOK_RCURLY is eaten by duk__parse_stmts() */ if (label_id >= 0) { duk__patch_jump_here(comp_ctx, pc_at_entry + 1); /* break jump */ } stmt_flags = 0; break; } case DUK_TOK_CONST: { DUK_DDD(DUK_DDDPRINT("constant declaration statement")); duk__parse_var_stmt(comp_ctx, res, DUK__EXPR_FLAG_REQUIRE_INIT /*expr_flags*/); stmt_flags = DUK__HAS_TERM; break; } case DUK_TOK_VAR: { DUK_DDD(DUK_DDDPRINT("variable declaration statement")); duk__parse_var_stmt(comp_ctx, res, 0 /*expr_flags*/); stmt_flags = DUK__HAS_TERM; break; } case DUK_TOK_SEMICOLON: { /* empty statement with an explicit semicolon */ DUK_DDD(DUK_DDDPRINT("empty statement")); stmt_flags = DUK__HAS_TERM; break; } case DUK_TOK_IF: { DUK_DDD(DUK_DDDPRINT("if statement")); duk__parse_if_stmt(comp_ctx, res); if (label_id >= 0) { duk__patch_jump_here(comp_ctx, pc_at_entry + 1); /* break jump */ } stmt_flags = 0; break; } case DUK_TOK_DO: { /* * Do-while statement is mostly trivial, but there is special * handling for automatic semicolon handling (triggered by the * DUK__ALLOW_AUTO_SEMI_ALWAYS) flag related to a bug filed at: * * https://bugs.ecmascript.org/show_bug.cgi?id=8 * * See doc/compiler.rst for details. */ DUK_DDD(DUK_DDDPRINT("do statement")); DUK_ASSERT(label_id >= 0); duk__update_label_flags(comp_ctx, label_id, DUK_LABEL_FLAG_ALLOW_BREAK | DUK_LABEL_FLAG_ALLOW_CONTINUE); duk__parse_do_stmt(comp_ctx, res, pc_at_entry); stmt_flags = DUK__HAS_TERM | DUK__ALLOW_AUTO_SEMI_ALWAYS; /* DUK__ALLOW_AUTO_SEMI_ALWAYS workaround */ break; } case DUK_TOK_WHILE: { DUK_DDD(DUK_DDDPRINT("while statement")); DUK_ASSERT(label_id >= 0); duk__update_label_flags(comp_ctx, label_id, DUK_LABEL_FLAG_ALLOW_BREAK | DUK_LABEL_FLAG_ALLOW_CONTINUE); duk__parse_while_stmt(comp_ctx, res, pc_at_entry); stmt_flags = 0; break; } case DUK_TOK_FOR: { /* * For/for-in statement is complicated to parse because * determining the statement type (three-part for vs. a * for-in) requires potential backtracking. * * See the helper for the messy stuff. */ DUK_DDD(DUK_DDDPRINT("for/for-in statement")); DUK_ASSERT(label_id >= 0); duk__update_label_flags(comp_ctx, label_id, DUK_LABEL_FLAG_ALLOW_BREAK | DUK_LABEL_FLAG_ALLOW_CONTINUE); duk__parse_for_stmt(comp_ctx, res, pc_at_entry); stmt_flags = 0; break; } case DUK_TOK_CONTINUE: case DUK_TOK_BREAK: { DUK_DDD(DUK_DDDPRINT("break/continue statement")); duk__parse_break_or_continue_stmt(comp_ctx, res); stmt_flags = DUK__HAS_TERM | DUK__IS_TERMINAL; break; } case DUK_TOK_RETURN: { DUK_DDD(DUK_DDDPRINT("return statement")); duk__parse_return_stmt(comp_ctx, res); stmt_flags = DUK__HAS_TERM | DUK__IS_TERMINAL; break; } case DUK_TOK_WITH: { DUK_DDD(DUK_DDDPRINT("with statement")); comp_ctx->curr_func.with_depth++; duk__parse_with_stmt(comp_ctx, res); if (label_id >= 0) { duk__patch_jump_here(comp_ctx, pc_at_entry + 1); /* break jump */ } comp_ctx->curr_func.with_depth--; stmt_flags = 0; break; } case DUK_TOK_SWITCH: { /* * The switch statement is pretty messy to compile. * See the helper for details. */ DUK_DDD(DUK_DDDPRINT("switch statement")); DUK_ASSERT(label_id >= 0); duk__update_label_flags(comp_ctx, label_id, DUK_LABEL_FLAG_ALLOW_BREAK); /* don't allow continue */ duk__parse_switch_stmt(comp_ctx, res, pc_at_entry); stmt_flags = 0; break; } case DUK_TOK_THROW: { DUK_DDD(DUK_DDDPRINT("throw statement")); duk__parse_throw_stmt(comp_ctx, res); stmt_flags = DUK__HAS_TERM | DUK__IS_TERMINAL; break; } case DUK_TOK_TRY: { DUK_DDD(DUK_DDDPRINT("try statement")); duk__parse_try_stmt(comp_ctx, res); stmt_flags = 0; break; } case DUK_TOK_DEBUGGER: { duk__advance(comp_ctx); #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_DDD(DUK_DDDPRINT("debugger statement: debugging enabled, emit debugger opcode")); duk__emit_op_only(comp_ctx, DUK_OP_DEBUGGER); #else DUK_DDD(DUK_DDDPRINT("debugger statement: ignored")); #endif stmt_flags = DUK__HAS_TERM; break; } default: { /* * Else, must be one of: * - ExpressionStatement, possibly a directive (String) * - LabelledStatement (Identifier followed by ':') * * Expressions beginning with 'function' keyword are covered by a case * above (such expressions are not allowed in standard E5 anyway). * Also expressions starting with '{' are interpreted as block * statements. See E5 Section 12.4. * * Directive detection is tricky; see E5 Section 14.1 on directive * prologue. A directive is an expression statement with a single * string literal and an explicit or automatic semicolon. Escape * characters are significant and no parens etc are allowed: * * 'use strict'; // valid 'use strict' directive * 'use\u0020strict'; // valid directive, not a 'use strict' directive * ('use strict'); // not a valid directive * * The expression is determined to consist of a single string literal * based on duk__expr_nud() and duk__expr_led() call counts. The string literal * of a 'use strict' directive is determined to lack any escapes based * num_escapes count from the lexer. Note that other directives may be * allowed to contain escapes, so a directive with escapes does not * terminate a directive prologue. * * We rely on the fact that the expression parser will not emit any * code for a single token expression. However, it will generate an * intermediate value which we will then successfully ignore. * * A similar approach is used for labels. */ duk_bool_t single_token; DUK_DDD(DUK_DDDPRINT("expression statement")); duk__exprtop(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); single_token = (comp_ctx->curr_func.nud_count == 1 && /* one token */ comp_ctx->curr_func.led_count == 0); /* no operators */ if (single_token && comp_ctx->prev_token.t == DUK_TOK_IDENTIFIER && comp_ctx->curr_token.t == DUK_TOK_COLON) { /* * Detected label */ duk_hstring *h_lab; /* expected ival */ DUK_ASSERT(res->t == DUK_IVAL_VAR); DUK_ASSERT(res->x1.t == DUK_ISPEC_VALUE); DUK_ASSERT(DUK_TVAL_IS_STRING(duk_get_tval(thr, res->x1.valstack_idx))); h_lab = comp_ctx->prev_token.str1; DUK_ASSERT(h_lab != NULL); DUK_DDD(DUK_DDDPRINT("explicit label site for label '%!O'", (duk_heaphdr *) h_lab)); duk__advance(comp_ctx); /* eat colon */ label_id = duk__stmt_label_site(comp_ctx, label_id); duk__add_label(comp_ctx, h_lab, pc_at_entry /*pc_label*/, label_id); /* a statement following a label cannot be a source element * (a function declaration). */ allow_source_elem = 0; DUK_DDD(DUK_DDDPRINT("label handled, retry statement parsing")); goto retry_parse; } stmt_flags = 0; if (dir_prol_at_entry && /* still in prologue */ single_token && /* single string token */ comp_ctx->prev_token.t == DUK_TOK_STRING) { /* * Detected a directive */ duk_hstring *h_dir; /* expected ival */ DUK_ASSERT(res->t == DUK_IVAL_PLAIN); DUK_ASSERT(res->x1.t == DUK_ISPEC_VALUE); DUK_ASSERT(DUK_TVAL_IS_STRING(duk_get_tval(thr, res->x1.valstack_idx))); h_dir = comp_ctx->prev_token.str1; DUK_ASSERT(h_dir != NULL); DUK_DDD(DUK_DDDPRINT("potential directive: %!O", h_dir)); stmt_flags |= DUK__STILL_PROLOGUE; /* Note: escaped characters differentiate directives */ if (comp_ctx->prev_token.num_escapes > 0) { DUK_DDD(DUK_DDDPRINT("directive contains escapes: valid directive " "but we ignore such directives")); } else { /* * The length comparisons are present to handle * strings like "use strict\u0000foo" as required. */ if (DUK_HSTRING_GET_BYTELEN(h_dir) == 10 && DUK_STRCMP((const char *) DUK_HSTRING_GET_DATA(h_dir), "use strict") == 0) { #if defined(DUK_USE_STRICT_DECL) DUK_DDD(DUK_DDDPRINT("use strict directive detected: strict flag %ld -> %ld", (long) comp_ctx->curr_func.is_strict, (long) 1)); comp_ctx->curr_func.is_strict = 1; #else DUK_DDD(DUK_DDDPRINT("use strict detected but strict declarations disabled, ignoring")); #endif } else if (DUK_HSTRING_GET_BYTELEN(h_dir) == 14 && DUK_STRCMP((const char *) DUK_HSTRING_GET_DATA(h_dir), "use duk notail") == 0) { DUK_DDD(DUK_DDDPRINT("use duk notail directive detected: notail flag %ld -> %ld", (long) comp_ctx->curr_func.is_notail, (long) 1)); comp_ctx->curr_func.is_notail = 1; } else { DUK_DD(DUK_DDPRINT("unknown directive: '%!O', ignoring but not terminating " "directive prologue", (duk_hobject *) h_dir)); } } } else { DUK_DDD(DUK_DDDPRINT("non-directive expression statement or no longer in prologue; " "prologue terminated if still active")); } stmt_flags |= DUK__HAS_VAL | DUK__HAS_TERM; } } /* end switch (tok) */ /* * Statement value handling. * * Global code and eval code has an implicit return value * which comes from the last statement with a value * (technically a non-"empty" continuation, which is * different from an empty statement). * * Since we don't know whether a later statement will * override the value of the current statement, we need * to coerce the statement value to a register allocated * for implicit return values. In other cases we need * to coerce the statement value to a plain value to get * any side effects out (consider e.g. "foo.bar;"). */ /* XXX: what about statements which leave a half-cooked value in 'res' * but have no stmt value? Any such statements? */ if (stmt_flags & DUK__HAS_VAL) { duk_regconst_t reg_stmt_value = comp_ctx->curr_func.reg_stmt_value; if (reg_stmt_value >= 0) { duk__ivalue_toforcedreg(comp_ctx, res, reg_stmt_value); } else { duk__ivalue_toplain_ignore(comp_ctx, res); } } else { ; } /* * Statement terminator check, including automatic semicolon * handling. After this step, 'curr_tok' should be the first * token after a possible statement terminator. */ if (stmt_flags & DUK__HAS_TERM) { if (comp_ctx->curr_token.t == DUK_TOK_SEMICOLON) { DUK_DDD(DUK_DDDPRINT("explicit semicolon terminates statement")); duk__advance(comp_ctx); } else { if (comp_ctx->curr_token.allow_auto_semi) { DUK_DDD(DUK_DDDPRINT("automatic semicolon terminates statement")); } else if (stmt_flags & DUK__ALLOW_AUTO_SEMI_ALWAYS) { /* XXX: make this lenience dependent on flags or strictness? */ DUK_DDD(DUK_DDDPRINT("automatic semicolon terminates statement (allowed for compatibility " "even though no lineterm present before next token)")); } else { DUK_ERROR_SYNTAX(thr, DUK_STR_UNTERMINATED_STMT); DUK_WO_NORETURN(return;); } } } else { DUK_DDD(DUK_DDDPRINT("statement has no terminator")); } /* * Directive prologue tracking. */ if (stmt_flags & DUK__STILL_PROLOGUE) { DUK_DDD(DUK_DDDPRINT("setting in_directive_prologue")); comp_ctx->curr_func.in_directive_prologue = 1; } /* * Cleanups (all statement parsing flows through here). * * Pop label site and reset labels. Reset 'next temp' to value at * entry to reuse temps. */ if (label_id >= 0) { duk__emit_bc(comp_ctx, DUK_OP_ENDLABEL, (duk_regconst_t) label_id); } DUK__SETTEMP(comp_ctx, temp_at_entry); duk__reset_labels_to_length(comp_ctx, labels_len_at_entry); /* XXX: return indication of "terminalness" (e.g. a 'throw' is terminal) */ DUK__RECURSION_DECREASE(comp_ctx, thr); } /* * Parse a statement list. * * Handles automatic semicolon insertion and implicit return value. * * Upon entry, 'curr_tok' should contain the first token of the first * statement (parsed in the "allow regexp literal" mode). Upon exit, * 'curr_tok' contains the token following the statement list terminator * (EOF or closing brace). */ DUK_LOCAL void duk__parse_stmts(duk_compiler_ctx *comp_ctx, duk_bool_t allow_source_elem, duk_bool_t expect_eof, duk_bool_t regexp_after) { duk_hthread *thr = comp_ctx->thr; duk_ivalue res_alloc; duk_ivalue *res = &res_alloc; /* Setup state. Initial ivalue is 'undefined'. */ duk_require_stack(thr, DUK__PARSE_STATEMENTS_SLOTS); /* XXX: 'res' setup can be moved to function body level; in fact, two 'res' * intermediate values suffice for parsing of each function. Nesting is needed * for nested functions (which may occur inside expressions). */ duk_memzero(&res_alloc, sizeof(res_alloc)); res->t = DUK_IVAL_PLAIN; res->x1.t = DUK_ISPEC_VALUE; res->x1.valstack_idx = duk_get_top(thr); res->x2.valstack_idx = res->x1.valstack_idx + 1; duk_push_undefined(thr); duk_push_undefined(thr); /* Parse statements until a closing token (EOF or '}') is found. */ for (;;) { /* Check whether statement list ends. */ if (expect_eof) { if (comp_ctx->curr_token.t == DUK_TOK_EOF) { break; } } else { if (comp_ctx->curr_token.t == DUK_TOK_RCURLY) { break; } } /* Check statement type based on the first token type. * * Note: expression parsing helpers expect 'curr_tok' to * contain the first token of the expression upon entry. */ DUK_DDD(DUK_DDDPRINT("TOKEN %ld (non-whitespace, non-comment)", (long) comp_ctx->curr_token.t)); duk__parse_stmt(comp_ctx, res, allow_source_elem); } /* RegExp is allowed / not allowed depending on context. For function * declarations RegExp is allowed because it follows a function * declaration statement and may appear as part of the next statement. * For function expressions RegExp is not allowed, and it's possible * to do something like '(function () {} / 123)'. */ if (regexp_after) { comp_ctx->curr_func.allow_regexp_in_adv = 1; } duk__advance(comp_ctx); /* Tear down state. */ duk_pop_2(thr); } /* * Declaration binding instantiation conceptually happens when calling a * function; for us it essentially means that function prologue. The * conceptual process is described in E5 Section 10.5. * * We need to keep track of all encountered identifiers to (1) create an * identifier-to-register map ("varmap"); and (2) detect duplicate * declarations. Identifiers which are not bound to registers still need * to be tracked for detecting duplicates. Currently such identifiers * are put into the varmap with a 'null' value, which is later cleaned up. * * To support functions with a large number of variable and function * declarations, registers are not allocated beyond a certain limit; * after that limit, variables and functions need slow path access. * Arguments are currently always register bound, which imposes a hard * (and relatively small) argument count limit. * * Some bindings in E5 are not configurable (= deletable) and almost all * are mutable (writable). Exceptions are: * * - The 'arguments' binding, established only if no shadowing argument * or function declaration exists. We handle 'arguments' creation * and binding through an explicit slow path environment record. * * - The "name" binding for a named function expression. This is also * handled through an explicit slow path environment record. */ /* XXX: add support for variables to not be register bound always, to * handle cases with a very large number of variables? */ DUK_LOCAL void duk__init_varmap_and_prologue_for_pass2(duk_compiler_ctx *comp_ctx, duk_regconst_t *out_stmt_value_reg) { duk_hthread *thr = comp_ctx->thr; duk_hstring *h_name; duk_bool_t configurable_bindings; duk_uarridx_t num_args; duk_uarridx_t num_decls; duk_regconst_t rc_name; duk_small_uint_t declvar_flags; duk_uarridx_t i; #if defined(DUK_USE_ASSERTIONS) duk_idx_t entry_top; #endif #if defined(DUK_USE_ASSERTIONS) entry_top = duk_get_top(thr); #endif /* * Preliminaries */ configurable_bindings = comp_ctx->curr_func.is_eval; DUK_DDD(DUK_DDDPRINT("configurable_bindings=%ld", (long) configurable_bindings)); /* varmap is already in comp_ctx->curr_func.varmap_idx */ /* * Function formal arguments, always bound to registers * (there's no support for shuffling them now). */ num_args = (duk_uarridx_t) duk_get_length(thr, comp_ctx->curr_func.argnames_idx); DUK_DDD(DUK_DDDPRINT("num_args=%ld", (long) num_args)); /* XXX: check num_args */ for (i = 0; i < num_args; i++) { duk_get_prop_index(thr, comp_ctx->curr_func.argnames_idx, i); h_name = duk_known_hstring(thr, -1); if (comp_ctx->curr_func.is_strict) { if (duk__hstring_is_eval_or_arguments(comp_ctx, h_name)) { DUK_DDD(DUK_DDDPRINT("arg named 'eval' or 'arguments' in strict mode -> SyntaxError")); goto error_argname; } duk_dup_top(thr); if (duk_has_prop(thr, comp_ctx->curr_func.varmap_idx)) { DUK_DDD(DUK_DDDPRINT("duplicate arg name in strict mode -> SyntaxError")); goto error_argname; } /* Ensure argument name is not a reserved word in current * (final) strictness. Formal argument parsing may not * catch reserved names if strictness changes during * parsing. * * We only need to do this in strict mode because non-strict * keyword are always detected in formal argument parsing. */ if (DUK_HSTRING_HAS_STRICT_RESERVED_WORD(h_name)) { goto error_argname; } } /* overwrite any previous binding of the same name; the effect is * that last argument of a certain name wins. */ /* only functions can have arguments */ DUK_ASSERT(comp_ctx->curr_func.is_function); duk_push_uarridx(thr, i); /* -> [ ... name index ] */ duk_put_prop(thr, comp_ctx->curr_func.varmap_idx); /* -> [ ... ] */ /* no code needs to be emitted, the regs already have values */ } /* use temp_next for tracking register allocations */ DUK__SETTEMP_CHECKMAX(comp_ctx, (duk_regconst_t) num_args); /* * After arguments, allocate special registers (like shuffling temps) */ if (out_stmt_value_reg) { *out_stmt_value_reg = DUK__ALLOCTEMP(comp_ctx); } if (comp_ctx->curr_func.needs_shuffle) { duk_regconst_t shuffle_base = DUK__ALLOCTEMPS(comp_ctx, 3); comp_ctx->curr_func.shuffle1 = shuffle_base; comp_ctx->curr_func.shuffle2 = shuffle_base + 1; comp_ctx->curr_func.shuffle3 = shuffle_base + 2; DUK_D(DUK_DPRINT("shuffle registers needed by function, allocated: %ld %ld %ld", (long) comp_ctx->curr_func.shuffle1, (long) comp_ctx->curr_func.shuffle2, (long) comp_ctx->curr_func.shuffle3)); } if (comp_ctx->curr_func.temp_next > 0x100) { DUK_D(DUK_DPRINT("not enough 8-bit regs: temp_next=%ld", (long) comp_ctx->curr_func.temp_next)); goto error_outofregs; } /* * Function declarations */ num_decls = (duk_uarridx_t) duk_get_length(thr, comp_ctx->curr_func.decls_idx); DUK_DDD(DUK_DDDPRINT("num_decls=%ld -> %!T", (long) num_decls, (duk_tval *) duk_get_tval(thr, comp_ctx->curr_func.decls_idx))); for (i = 0; i < num_decls; i += 2) { duk_int_t decl_type; duk_int_t fnum; duk_get_prop_index(thr, comp_ctx->curr_func.decls_idx, i + 1); /* decl type */ decl_type = duk_to_int(thr, -1); fnum = decl_type >> 8; /* XXX: macros */ decl_type = decl_type & 0xff; duk_pop(thr); if (decl_type != DUK_DECL_TYPE_FUNC) { continue; } duk_get_prop_index(thr, comp_ctx->curr_func.decls_idx, i); /* decl name */ /* XXX: spilling */ if (comp_ctx->curr_func.is_function) { duk_regconst_t reg_bind; duk_dup_top(thr); if (duk_has_prop(thr, comp_ctx->curr_func.varmap_idx)) { /* shadowed; update value */ duk_dup_top(thr); duk_get_prop(thr, comp_ctx->curr_func.varmap_idx); reg_bind = duk_to_int(thr, -1); /* [ ... name reg_bind ] */ duk__emit_a_bc(comp_ctx, DUK_OP_CLOSURE, reg_bind, (duk_regconst_t) fnum); } else { /* function: always register bound */ reg_bind = DUK__ALLOCTEMP(comp_ctx); duk__emit_a_bc(comp_ctx, DUK_OP_CLOSURE, reg_bind, (duk_regconst_t) fnum); duk_push_int(thr, (duk_int_t) reg_bind); } } else { /* Function declaration for global/eval code is emitted even * for duplicates, because of E5 Section 10.5, step 5.e of * E5.1 (special behavior for variable bound to global object). * * DECLVAR will not re-declare a variable as such, but will * update the binding value. */ duk_regconst_t reg_temp = DUK__ALLOCTEMP(comp_ctx); duk_dup_top(thr); rc_name = duk__getconst(comp_ctx); duk_push_null(thr); duk__emit_a_bc(comp_ctx, DUK_OP_CLOSURE, reg_temp, (duk_regconst_t) fnum); declvar_flags = DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_ENUMERABLE | DUK_BC_DECLVAR_FLAG_FUNC_DECL; if (configurable_bindings) { declvar_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE; } duk__emit_a_b_c(comp_ctx, DUK_OP_DECLVAR | DUK__EMIT_FLAG_NO_SHUFFLE_A | DUK__EMIT_FLAG_BC_REGCONST, (duk_regconst_t) declvar_flags /*flags*/, rc_name /*name*/, reg_temp /*value*/); DUK__SETTEMP(comp_ctx, reg_temp); /* forget temp */ } DUK_DDD(DUK_DDDPRINT("function declaration to varmap: %!T -> %!T", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); #if defined(DUK_USE_FASTINT) DUK_ASSERT(DUK_TVAL_IS_NULL(duk_get_tval(thr, -1)) || DUK_TVAL_IS_FASTINT(duk_get_tval(thr, -1))); #endif duk_put_prop(thr, comp_ctx->curr_func.varmap_idx); /* [ ... name reg/null ] -> [ ... ] */ } /* * 'arguments' binding is special; if a shadowing argument or * function declaration exists, an arguments object will * definitely not be needed, regardless of whether the identifier * 'arguments' is referenced inside the function body. */ if (duk_has_prop_stridx(thr, comp_ctx->curr_func.varmap_idx, DUK_STRIDX_LC_ARGUMENTS)) { DUK_DDD(DUK_DDDPRINT("'arguments' is shadowed by argument or function declaration " "-> arguments object creation can be skipped")); comp_ctx->curr_func.is_arguments_shadowed = 1; } /* * Variable declarations. * * Unlike function declarations, variable declaration values don't get * assigned on entry. If a binding of the same name already exists, just * ignore it silently. */ for (i = 0; i < num_decls; i += 2) { duk_int_t decl_type; duk_get_prop_index(thr, comp_ctx->curr_func.decls_idx, i + 1); /* decl type */ decl_type = duk_to_int(thr, -1); decl_type = decl_type & 0xff; duk_pop(thr); if (decl_type != DUK_DECL_TYPE_VAR) { continue; } duk_get_prop_index(thr, comp_ctx->curr_func.decls_idx, i); /* decl name */ if (duk_has_prop(thr, comp_ctx->curr_func.varmap_idx)) { /* shadowed, ignore */ } else { duk_get_prop_index(thr, comp_ctx->curr_func.decls_idx, i); /* decl name */ h_name = duk_known_hstring(thr, -1); if (h_name == DUK_HTHREAD_STRING_LC_ARGUMENTS(thr) && !comp_ctx->curr_func.is_arguments_shadowed) { /* E5 Section steps 7-8 */ DUK_DDD(DUK_DDDPRINT("'arguments' not shadowed by a function declaration, " "but appears as a variable declaration -> treat as " "a no-op for variable declaration purposes")); duk_pop(thr); continue; } /* XXX: spilling */ if (comp_ctx->curr_func.is_function) { duk_regconst_t reg_bind = DUK__ALLOCTEMP(comp_ctx); /* no need to init reg, it will be undefined on entry */ duk_push_int(thr, (duk_int_t) reg_bind); } else { duk_dup_top(thr); rc_name = duk__getconst(comp_ctx); duk_push_null(thr); declvar_flags = DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_ENUMERABLE; if (configurable_bindings) { declvar_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE; } duk__emit_a_b_c(comp_ctx, DUK_OP_DECLVAR | DUK__EMIT_FLAG_NO_SHUFFLE_A | DUK__EMIT_FLAG_BC_REGCONST, (duk_regconst_t) declvar_flags /*flags*/, rc_name /*name*/, 0 /*value*/); } duk_put_prop(thr, comp_ctx->curr_func.varmap_idx); /* [ ... name reg/null ] -> [ ... ] */ } } /* * Wrap up */ DUK_DDD(DUK_DDDPRINT("varmap: %!T, is_arguments_shadowed=%ld", (duk_tval *) duk_get_tval(thr, comp_ctx->curr_func.varmap_idx), (long) comp_ctx->curr_func.is_arguments_shadowed)); DUK_ASSERT_TOP(thr, entry_top); return; error_outofregs: DUK_ERROR_RANGE(thr, DUK_STR_REG_LIMIT); DUK_WO_NORETURN(return;); error_argname: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_ARG_NAME); DUK_WO_NORETURN(return;); } /* * Parse a function-body-like expression (FunctionBody or Program * in E5 grammar) using a two-pass parse. The productions appear * in the following contexts: * * - function expression * - function statement * - function declaration * - getter in object literal * - setter in object literal * - global code * - eval code * - Function constructor body * * This function only parses the statement list of the body; the argument * list and possible function name must be initialized by the caller. * For instance, for Function constructor, the argument names are originally * on the value stack. The parsing of statements ends either at an EOF or * a closing brace; this is controlled by an input flag. * * Note that there are many differences affecting parsing and even code * generation: * * - Global and eval code have an implicit return value generated * by the last statement; function code does not * * - Global code, eval code, and Function constructor body end in * an EOF, other bodies in a closing brace ('}') * * Upon entry, 'curr_tok' is ignored and the function will pull in the * first token on its own. Upon exit, 'curr_tok' is the terminating * token (EOF or closing brace). */ DUK_LOCAL void duk__parse_func_body(duk_compiler_ctx *comp_ctx, duk_bool_t expect_eof, duk_bool_t implicit_return_value, duk_bool_t regexp_after, duk_small_int_t expect_token) { duk_compiler_func *func; duk_hthread *thr; duk_regconst_t reg_stmt_value = -1; duk_lexer_point lex_pt; duk_regconst_t temp_first; duk_small_int_t compile_round = 1; DUK_ASSERT(comp_ctx != NULL); thr = comp_ctx->thr; DUK_ASSERT(thr != NULL); func = &comp_ctx->curr_func; DUK_ASSERT(func != NULL); DUK__RECURSION_INCREASE(comp_ctx, thr); duk_require_stack(thr, DUK__FUNCTION_BODY_REQUIRE_SLOTS); /* * Store lexer position for a later rewind */ DUK_LEXER_GETPOINT(&comp_ctx->lex, &lex_pt); /* * Program code (global and eval code) has an implicit return value * from the last statement value (e.g. eval("1; 2+3;") returns 3). * This is not the case with functions. If implicit statement return * value is requested, all statements are coerced to a register * allocated here, and used in the implicit return statement below. */ /* XXX: this is pointless here because pass 1 is throw-away */ if (implicit_return_value) { reg_stmt_value = DUK__ALLOCTEMP(comp_ctx); /* If an implicit return value is needed by caller, it must be * initialized to 'undefined' because we don't know whether any * non-empty (where "empty" is a continuation type, and different * from an empty statement) statements will be executed. * * However, since 1st pass is a throwaway one, no need to emit * it here. */ #if 0 duk__emit_bc(comp_ctx, DUK_OP_LDUNDEF, 0); #endif } /* * First pass. * * Gather variable/function declarations needed for second pass. * Code generated is dummy and discarded. */ func->in_directive_prologue = 1; func->in_scanning = 1; func->may_direct_eval = 0; func->id_access_arguments = 0; func->id_access_slow = 0; func->id_access_slow_own = 0; func->reg_stmt_value = reg_stmt_value; #if defined(DUK_USE_DEBUGGER_SUPPORT) func->min_line = DUK_INT_MAX; func->max_line = 0; #endif /* duk__parse_stmts() expects curr_tok to be set; parse in "allow * regexp literal" mode with current strictness. */ if (expect_token >= 0) { /* Eating a left curly; regexp mode is allowed by left curly * based on duk__token_lbp[] automatically. */ DUK_ASSERT(expect_token == DUK_TOK_LCURLY); duk__update_lineinfo_currtoken(comp_ctx); duk__advance_expect(comp_ctx, expect_token); } else { /* Need to set curr_token.t because lexing regexp mode depends on current * token type. Zero value causes "allow regexp" mode. */ comp_ctx->curr_token.t = 0; duk__advance(comp_ctx); } DUK_DDD(DUK_DDDPRINT("begin 1st pass")); duk__parse_stmts(comp_ctx, 1, /* allow source elements */ expect_eof, /* expect EOF instead of } */ regexp_after); /* regexp after */ DUK_DDD(DUK_DDDPRINT("end 1st pass")); /* * Second (and possibly third) pass. * * Generate actual code. In most cases the need for shuffle * registers is detected during pass 1, but in some corner cases * we'll only detect it during pass 2 and a third pass is then * needed (see GH-115). */ for (;;) { duk_bool_t needs_shuffle_before = comp_ctx->curr_func.needs_shuffle; compile_round++; /* * Rewind lexer. * * duk__parse_stmts() expects curr_tok to be set; parse in "allow regexp * literal" mode with current strictness. * * curr_token line number info should be initialized for pass 2 before * generating prologue, to ensure prologue bytecode gets nice line numbers. */ DUK_DDD(DUK_DDDPRINT("rewind lexer")); DUK_LEXER_SETPOINT(&comp_ctx->lex, &lex_pt); comp_ctx->curr_token.t = 0; /* this is needed for regexp mode */ comp_ctx->curr_token.start_line = 0; /* needed for line number tracking (becomes prev_token.start_line) */ duk__advance(comp_ctx); /* * Reset function state and perform register allocation, which creates * 'varmap' for second pass. Function prologue for variable declarations, * binding value initializations etc is emitted as a by-product. * * Strict mode restrictions for duplicate and invalid argument * names are checked here now that we know whether the function * is actually strict. See: test-dev-strict-mode-boundary.js. * * Inner functions are compiled during pass 1 and are not reset. */ duk__reset_func_for_pass2(comp_ctx); func->in_directive_prologue = 1; func->in_scanning = 0; /* must be able to emit code, alloc consts, etc. */ duk__init_varmap_and_prologue_for_pass2(comp_ctx, (implicit_return_value ? ®_stmt_value : NULL)); func->reg_stmt_value = reg_stmt_value; temp_first = DUK__GETTEMP(comp_ctx); func->temp_first = temp_first; func->temp_next = temp_first; func->stmt_next = 0; func->label_next = 0; /* XXX: init or assert catch depth etc -- all values */ func->id_access_arguments = 0; func->id_access_slow = 0; func->id_access_slow_own = 0; /* * Check function name validity now that we know strictness. * This only applies to function declarations and expressions, * not setter/getter name. * * See: test-dev-strict-mode-boundary.js */ if (func->is_function && !func->is_setget && func->h_name != NULL) { if (func->is_strict) { if (duk__hstring_is_eval_or_arguments(comp_ctx, func->h_name)) { DUK_DDD(DUK_DDDPRINT("func name is 'eval' or 'arguments' in strict mode")); goto error_funcname; } if (DUK_HSTRING_HAS_STRICT_RESERVED_WORD(func->h_name)) { DUK_DDD(DUK_DDDPRINT("func name is a reserved word in strict mode")); goto error_funcname; } } else { if (DUK_HSTRING_HAS_RESERVED_WORD(func->h_name) && !DUK_HSTRING_HAS_STRICT_RESERVED_WORD(func->h_name)) { DUK_DDD(DUK_DDDPRINT("func name is a reserved word in non-strict mode")); goto error_funcname; } } } /* * Second pass parsing. */ if (implicit_return_value) { /* Default implicit return value. */ duk__emit_bc(comp_ctx, DUK_OP_LDUNDEF, 0); } DUK_DDD(DUK_DDDPRINT("begin 2nd pass")); duk__parse_stmts(comp_ctx, 1, /* allow source elements */ expect_eof, /* expect EOF instead of } */ regexp_after); /* regexp after */ DUK_DDD(DUK_DDDPRINT("end 2nd pass")); duk__update_lineinfo_currtoken(comp_ctx); if (needs_shuffle_before == comp_ctx->curr_func.needs_shuffle) { /* Shuffle decision not changed. */ break; } if (compile_round >= 3) { /* Should never happen but avoid infinite loop just in case. */ DUK_D(DUK_DPRINT("more than 3 compile passes needed, should never happen")); DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return;); } DUK_D(DUK_DPRINT("need additional round to compile function, round now %d", (int) compile_round)); } /* * Emit a final RETURN. * * It would be nice to avoid emitting an unnecessary "return" opcode * if the current PC is not reachable. However, this cannot be reliably * detected; even if the previous instruction is an unconditional jump, * there may be a previous jump which jumps to current PC (which is the * case for iteration and conditional statements, for instance). */ /* XXX: request a "last statement is terminal" from duk__parse_stmt() and duk__parse_stmts(); * we could avoid the last RETURN if we could ensure there is no way to get here * (directly or via a jump) */ DUK_ASSERT(comp_ctx->curr_func.catch_depth == 0); if (reg_stmt_value >= 0) { DUK_ASSERT(DUK__ISREG(reg_stmt_value)); duk__emit_bc(comp_ctx, DUK_OP_RETREG, reg_stmt_value /*reg*/); } else { duk__emit_op_only(comp_ctx, DUK_OP_RETUNDEF); } /* * Peephole optimize JUMP chains. */ duk__peephole_optimize_bytecode(comp_ctx); /* * comp_ctx->curr_func is now ready to be converted into an actual * function template. */ DUK__RECURSION_DECREASE(comp_ctx, thr); return; error_funcname: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_FUNC_NAME); DUK_WO_NORETURN(return;); } /* * Parse a function-like expression: * * - function expression * - function declaration * - function statement (non-standard) * - setter/getter * * Adds the function to comp_ctx->curr_func function table and returns the * function number. * * On entry, curr_token points to: * * - the token after 'function' for function expression/declaration/statement * - the token after 'set' or 'get' for setter/getter */ /* Parse formals. */ DUK_LOCAL void duk__parse_func_formals(duk_compiler_ctx *comp_ctx) { duk_hthread *thr = comp_ctx->thr; duk_bool_t first = 1; duk_uarridx_t n; for (;;) { if (comp_ctx->curr_token.t == DUK_TOK_RPAREN) { break; } if (first) { /* no comma */ first = 0; } else { duk__advance_expect(comp_ctx, DUK_TOK_COMMA); } /* Note: when parsing a formal list in non-strict context, e.g. * "implements" is parsed as an identifier. When the function is * later detected to be strict, the argument list must be rechecked * against a larger set of reserved words (that of strict mode). * This is handled by duk__parse_func_body(). Here we recognize * whatever tokens are considered reserved in current strictness * (which is not always enough). */ if (comp_ctx->curr_token.t != DUK_TOK_IDENTIFIER) { DUK_ERROR_SYNTAX(thr, DUK_STR_EXPECTED_IDENTIFIER); DUK_WO_NORETURN(return;); } DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_IDENTIFIER); DUK_ASSERT(comp_ctx->curr_token.str1 != NULL); DUK_DDD(DUK_DDDPRINT("formal argument: %!O", (duk_heaphdr *) comp_ctx->curr_token.str1)); /* XXX: append primitive */ duk_push_hstring(thr, comp_ctx->curr_token.str1); n = (duk_uarridx_t) duk_get_length(thr, comp_ctx->curr_func.argnames_idx); duk_put_prop_index(thr, comp_ctx->curr_func.argnames_idx, n); duk__advance(comp_ctx); /* eat identifier */ } } /* Parse a function-like expression, assuming that 'comp_ctx->curr_func' is * correctly set up. Assumes that curr_token is just after 'function' (or * 'set'/'get' etc). */ DUK_LOCAL void duk__parse_func_like_raw(duk_compiler_ctx *comp_ctx, duk_small_uint_t flags) { duk_hthread *thr = comp_ctx->thr; duk_token *tok; duk_bool_t no_advance; DUK_ASSERT(comp_ctx->curr_func.num_formals == 0); DUK_ASSERT(comp_ctx->curr_func.is_function == 1); DUK_ASSERT(comp_ctx->curr_func.is_eval == 0); DUK_ASSERT(comp_ctx->curr_func.is_global == 0); DUK_ASSERT(comp_ctx->curr_func.is_setget == ((flags & DUK__FUNC_FLAG_GETSET) != 0)); duk__update_lineinfo_currtoken(comp_ctx); /* * Function name (if any) * * We don't check for prohibited names here, because we don't * yet know whether the function will be strict. Function body * parsing handles this retroactively. * * For function expressions and declarations function name must * be an Identifer (excludes reserved words). For setter/getter * it is a PropertyName which allows reserved words and also * strings and numbers (e.g. "{ get 1() { ... } }"). * * Function parsing may start either from prev_token or curr_token * (object literal method definition uses prev_token for example). * This is dealt with for the initial token. */ no_advance = (flags & DUK__FUNC_FLAG_USE_PREVTOKEN); if (no_advance) { tok = &comp_ctx->prev_token; } else { tok = &comp_ctx->curr_token; } if (flags & DUK__FUNC_FLAG_GETSET) { /* PropertyName -> IdentifierName | StringLiteral | NumericLiteral */ if (tok->t_nores == DUK_TOK_IDENTIFIER || tok->t == DUK_TOK_STRING) { duk_push_hstring(thr, tok->str1); /* keep in valstack */ } else if (tok->t == DUK_TOK_NUMBER) { duk_push_number(thr, tok->num); duk_to_string(thr, -1); } else { DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_GETSET_NAME); DUK_WO_NORETURN(return;); } comp_ctx->curr_func.h_name = duk_known_hstring(thr, -1); /* borrowed reference */ } else { /* Function name is an Identifier (not IdentifierName), but we get * the raw name (not recognizing keywords) here and perform the name * checks only after pass 1. */ if (tok->t_nores == DUK_TOK_IDENTIFIER) { duk_push_hstring(thr, tok->str1); /* keep in valstack */ comp_ctx->curr_func.h_name = duk_known_hstring(thr, -1); /* borrowed reference */ } else { /* valstack will be unbalanced, which is OK */ DUK_ASSERT((flags & DUK__FUNC_FLAG_GETSET) == 0); DUK_ASSERT(comp_ctx->curr_func.h_name == NULL); no_advance = 1; if (flags & DUK__FUNC_FLAG_DECL) { DUK_ERROR_SYNTAX(thr, DUK_STR_FUNC_NAME_REQUIRED); DUK_WO_NORETURN(return;); } } } DUK_DD(DUK_DDPRINT("function name: %!O", (duk_heaphdr *) comp_ctx->curr_func.h_name)); if (!no_advance) { duk__advance(comp_ctx); } /* * Formal argument list * * We don't check for prohibited names or for duplicate argument * names here, becase we don't yet know whether the function will * be strict. Function body parsing handles this retroactively. */ duk__advance_expect(comp_ctx, DUK_TOK_LPAREN); duk__parse_func_formals(comp_ctx); DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_RPAREN); duk__advance(comp_ctx); /* * Parse function body */ duk__parse_func_body(comp_ctx, 0, /* expect_eof */ 0, /* implicit_return_value */ flags & DUK__FUNC_FLAG_DECL, /* regexp_after */ DUK_TOK_LCURLY); /* expect_token */ /* * Convert duk_compiler_func to a function template and add it * to the parent function table. */ duk__convert_to_func_template(comp_ctx); /* -> [ ... func ] */ } /* Parse an inner function, adding the function template to the current function's * function table. Return a function number to be used by the outer function. * * Avoiding O(depth^2) inner function parsing is handled here. On the first pass, * compile and register the function normally into the 'funcs' array, also recording * a lexer point (offset/line) to the closing brace of the function. On the second * pass, skip the function and return the same 'fnum' as on the first pass by using * a running counter. * * An unfortunate side effect of this is that when parsing the inner function, almost * nothing is known of the outer function, i.e. the inner function's scope. We don't * need that information at the moment, but it would allow some optimizations if it * were used. */ DUK_LOCAL duk_int_t duk__parse_func_like_fnum(duk_compiler_ctx *comp_ctx, duk_small_uint_t flags) { duk_hthread *thr = comp_ctx->thr; duk_compiler_func old_func; duk_idx_t entry_top; duk_int_t fnum; /* * On second pass, skip the function. */ if (!comp_ctx->curr_func.in_scanning) { duk_lexer_point lex_pt; fnum = comp_ctx->curr_func.fnum_next++; duk_get_prop_index(thr, comp_ctx->curr_func.funcs_idx, (duk_uarridx_t) (fnum * 3 + 1)); lex_pt.offset = (duk_size_t) duk_to_uint(thr, -1); duk_pop(thr); duk_get_prop_index(thr, comp_ctx->curr_func.funcs_idx, (duk_uarridx_t) (fnum * 3 + 2)); lex_pt.line = duk_to_int(thr, -1); duk_pop(thr); DUK_DDD(DUK_DDDPRINT("second pass of an inner func, skip the function, reparse closing brace; lex offset=%ld, line=%ld", (long) lex_pt.offset, (long) lex_pt.line)); DUK_LEXER_SETPOINT(&comp_ctx->lex, &lex_pt); comp_ctx->curr_token.t = 0; /* this is needed for regexp mode */ comp_ctx->curr_token.start_line = 0; /* needed for line number tracking (becomes prev_token.start_line) */ duk__advance(comp_ctx); /* RegExp is not allowed after a function expression, e.g. in * (function () {} / 123). A RegExp *is* allowed after a * function declaration! */ if (flags & DUK__FUNC_FLAG_DECL) { comp_ctx->curr_func.allow_regexp_in_adv = 1; } duk__advance_expect(comp_ctx, DUK_TOK_RCURLY); return fnum; } /* * On first pass, perform actual parsing. Remember valstack top on entry * to restore it later, and switch to using a new function in comp_ctx. */ entry_top = duk_get_top(thr); DUK_DDD(DUK_DDDPRINT("before func: entry_top=%ld, curr_tok.start_offset=%ld", (long) entry_top, (long) comp_ctx->curr_token.start_offset)); duk_memcpy(&old_func, &comp_ctx->curr_func, sizeof(duk_compiler_func)); duk_memzero(&comp_ctx->curr_func, sizeof(duk_compiler_func)); duk__init_func_valstack_slots(comp_ctx); DUK_ASSERT(comp_ctx->curr_func.num_formals == 0); /* inherit initial strictness from parent */ comp_ctx->curr_func.is_strict = old_func.is_strict; /* XXX: It might be better to just store the flags into the curr_func * struct and use them as is without this flag interpretation step * here. */ DUK_ASSERT(comp_ctx->curr_func.is_notail == 0); comp_ctx->curr_func.is_function = 1; DUK_ASSERT(comp_ctx->curr_func.is_eval == 0); DUK_ASSERT(comp_ctx->curr_func.is_global == 0); comp_ctx->curr_func.is_setget = ((flags & DUK__FUNC_FLAG_GETSET) != 0); comp_ctx->curr_func.is_namebinding = !(flags & (DUK__FUNC_FLAG_GETSET | DUK__FUNC_FLAG_METDEF | DUK__FUNC_FLAG_DECL)); /* no name binding for: declarations, objlit getset, objlit method def */ comp_ctx->curr_func.is_constructable = !(flags & (DUK__FUNC_FLAG_GETSET | DUK__FUNC_FLAG_METDEF)); /* not constructable: objlit getset, objlit method def */ /* * Parse inner function */ duk__parse_func_like_raw(comp_ctx, flags); /* pushes function template */ /* prev_token.start_offset points to the closing brace here; when skipping * we're going to reparse the closing brace to ensure semicolon insertion * etc work as expected. */ DUK_DDD(DUK_DDDPRINT("after func: prev_tok.start_offset=%ld, curr_tok.start_offset=%ld", (long) comp_ctx->prev_token.start_offset, (long) comp_ctx->curr_token.start_offset)); DUK_ASSERT(comp_ctx->lex.input[comp_ctx->prev_token.start_offset] == (duk_uint8_t) DUK_ASC_RCURLY); /* XXX: append primitive */ DUK_ASSERT(duk_get_length(thr, old_func.funcs_idx) == (duk_size_t) (old_func.fnum_next * 3)); fnum = old_func.fnum_next++; if (fnum > DUK__MAX_FUNCS) { DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_FUNC_LIMIT); DUK_WO_NORETURN(return 0;); } /* array writes autoincrement length */ (void) duk_put_prop_index(thr, old_func.funcs_idx, (duk_uarridx_t) (fnum * 3)); duk_push_size_t(thr, comp_ctx->prev_token.start_offset); (void) duk_put_prop_index(thr, old_func.funcs_idx, (duk_uarridx_t) (fnum * 3 + 1)); duk_push_int(thr, comp_ctx->prev_token.start_line); (void) duk_put_prop_index(thr, old_func.funcs_idx, (duk_uarridx_t) (fnum * 3 + 2)); /* * Cleanup: restore original function, restore valstack state. * * Function declaration handling needs the function name to be pushed * on the value stack. */ if (flags & DUK__FUNC_FLAG_PUSHNAME_PASS1) { DUK_ASSERT(comp_ctx->curr_func.h_name != NULL); duk_push_hstring(thr, comp_ctx->curr_func.h_name); duk_replace(thr, entry_top); duk_set_top(thr, entry_top + 1); } else { duk_set_top(thr, entry_top); } duk_memcpy((void *) &comp_ctx->curr_func, (void *) &old_func, sizeof(duk_compiler_func)); return fnum; } /* * Compile input string into an executable function template without * arguments. * * The string is parsed as the "Program" production of ECMAScript E5. * Compilation context can be either global code or eval code (see E5 * Sections 14 and 15.1.2.1). * * Input stack: [ ... filename ] * Output stack: [ ... func_template ] */ /* XXX: source code property */ DUK_LOCAL duk_ret_t duk__js_compile_raw(duk_hthread *thr, void *udata) { duk_hstring *h_filename; duk__compiler_stkstate *comp_stk; duk_compiler_ctx *comp_ctx; duk_lexer_point *lex_pt; duk_compiler_func *func; duk_idx_t entry_top; duk_bool_t is_strict; duk_bool_t is_eval; duk_bool_t is_funcexpr; duk_small_uint_t flags; DUK_ASSERT(thr != NULL); DUK_ASSERT(udata != NULL); /* * Arguments check */ entry_top = duk_get_top(thr); DUK_ASSERT(entry_top >= 1); comp_stk = (duk__compiler_stkstate *) udata; comp_ctx = &comp_stk->comp_ctx_alloc; lex_pt = &comp_stk->lex_pt_alloc; DUK_ASSERT(comp_ctx != NULL); DUK_ASSERT(lex_pt != NULL); flags = comp_stk->flags; is_eval = (flags & DUK_COMPILE_EVAL ? 1 : 0); is_strict = (flags & DUK_COMPILE_STRICT ? 1 : 0); is_funcexpr = (flags & DUK_COMPILE_FUNCEXPR ? 1 : 0); h_filename = duk_get_hstring(thr, -1); /* may be undefined */ /* * Init compiler and lexer contexts */ func = &comp_ctx->curr_func; #if defined(DUK_USE_EXPLICIT_NULL_INIT) comp_ctx->thr = NULL; comp_ctx->h_filename = NULL; comp_ctx->prev_token.str1 = NULL; comp_ctx->prev_token.str2 = NULL; comp_ctx->curr_token.str1 = NULL; comp_ctx->curr_token.str2 = NULL; #endif duk_require_stack(thr, DUK__COMPILE_ENTRY_SLOTS); duk_push_dynamic_buffer(thr, 0); /* entry_top + 0 */ duk_push_undefined(thr); /* entry_top + 1 */ duk_push_undefined(thr); /* entry_top + 2 */ duk_push_undefined(thr); /* entry_top + 3 */ duk_push_undefined(thr); /* entry_top + 4 */ comp_ctx->thr = thr; comp_ctx->h_filename = h_filename; comp_ctx->tok11_idx = entry_top + 1; comp_ctx->tok12_idx = entry_top + 2; comp_ctx->tok21_idx = entry_top + 3; comp_ctx->tok22_idx = entry_top + 4; comp_ctx->recursion_limit = DUK_USE_COMPILER_RECLIMIT; /* comp_ctx->lex has been pre-initialized by caller: it has been * zeroed and input/input_length has been set. */ comp_ctx->lex.thr = thr; /* comp_ctx->lex.input and comp_ctx->lex.input_length filled by caller */ comp_ctx->lex.slot1_idx = comp_ctx->tok11_idx; comp_ctx->lex.slot2_idx = comp_ctx->tok12_idx; comp_ctx->lex.buf_idx = entry_top + 0; comp_ctx->lex.buf = (duk_hbuffer_dynamic *) duk_known_hbuffer(thr, entry_top + 0); DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(comp_ctx->lex.buf) && !DUK_HBUFFER_HAS_EXTERNAL(comp_ctx->lex.buf)); comp_ctx->lex.token_limit = DUK_COMPILER_TOKEN_LIMIT; lex_pt->offset = 0; lex_pt->line = 1; DUK_LEXER_SETPOINT(&comp_ctx->lex, lex_pt); /* fills window */ comp_ctx->curr_token.start_line = 0; /* needed for line number tracking (becomes prev_token.start_line) */ /* * Initialize function state for a zero-argument function */ duk__init_func_valstack_slots(comp_ctx); DUK_ASSERT(func->num_formals == 0); if (is_funcexpr) { /* Name will be filled from function expression, not by caller. * This case is used by Function constructor and duk_compile() * API with the DUK_COMPILE_FUNCTION option. */ DUK_ASSERT(func->h_name == NULL); } else { duk_push_hstring_stridx(thr, (is_eval ? DUK_STRIDX_EVAL : DUK_STRIDX_GLOBAL)); func->h_name = duk_get_hstring(thr, -1); } /* * Parse a function body or a function-like expression, depending * on flags. */ DUK_ASSERT(func->is_setget == 0); func->is_strict = (duk_uint8_t) is_strict; DUK_ASSERT(func->is_notail == 0); if (is_funcexpr) { func->is_function = 1; DUK_ASSERT(func->is_eval == 0); DUK_ASSERT(func->is_global == 0); func->is_namebinding = 1; func->is_constructable = 1; duk__advance(comp_ctx); /* init 'curr_token' */ duk__advance_expect(comp_ctx, DUK_TOK_FUNCTION); (void) duk__parse_func_like_raw(comp_ctx, 0 /*flags*/); } else { DUK_ASSERT(func->is_function == 0); DUK_ASSERT(is_eval == 0 || is_eval == 1); func->is_eval = (duk_uint8_t) is_eval; func->is_global = (duk_uint8_t) !is_eval; DUK_ASSERT(func->is_namebinding == 0); DUK_ASSERT(func->is_constructable == 0); duk__parse_func_body(comp_ctx, 1, /* expect_eof */ 1, /* implicit_return_value */ 1, /* regexp_after (does not matter) */ -1); /* expect_token */ } /* * Convert duk_compiler_func to a function template */ duk__convert_to_func_template(comp_ctx); /* * Wrapping duk_safe_call() will mangle the stack, just return stack top */ /* [ ... filename (temps) func ] */ return 1; } DUK_INTERNAL void duk_js_compile(duk_hthread *thr, const duk_uint8_t *src_buffer, duk_size_t src_length, duk_small_uint_t flags) { duk__compiler_stkstate comp_stk; duk_compiler_ctx *prev_ctx; duk_ret_t safe_rc; DUK_ASSERT(thr != NULL); DUK_ASSERT(src_buffer != NULL); /* preinitialize lexer state partially */ duk_memzero(&comp_stk, sizeof(comp_stk)); comp_stk.flags = flags; DUK_LEXER_INITCTX(&comp_stk.comp_ctx_alloc.lex); comp_stk.comp_ctx_alloc.lex.input = src_buffer; comp_stk.comp_ctx_alloc.lex.input_length = src_length; comp_stk.comp_ctx_alloc.lex.flags = flags; /* Forward flags directly for now. */ /* [ ... filename ] */ prev_ctx = thr->compile_ctx; thr->compile_ctx = &comp_stk.comp_ctx_alloc; /* for duk_error_augment.c */ safe_rc = duk_safe_call(thr, duk__js_compile_raw, (void *) &comp_stk /*udata*/, 1 /*nargs*/, 1 /*nrets*/); thr->compile_ctx = prev_ctx; /* must restore reliably before returning */ if (safe_rc != DUK_EXEC_SUCCESS) { DUK_D(DUK_DPRINT("compilation failed: %!T", duk_get_tval(thr, -1))); (void) duk_throw(thr); DUK_WO_NORETURN(return;); } /* [ ... template ] */ } /* automatic undefs */ #undef DUK__ALLOCTEMP #undef DUK__ALLOCTEMPS #undef DUK__ALLOW_AUTO_SEMI_ALWAYS #undef DUK__BC_INITIAL_INSTS #undef DUK__BP_ADDITIVE #undef DUK__BP_ASSIGNMENT #undef DUK__BP_BAND #undef DUK__BP_BOR #undef DUK__BP_BXOR #undef DUK__BP_CALL #undef DUK__BP_CLOSING #undef DUK__BP_COMMA #undef DUK__BP_CONDITIONAL #undef DUK__BP_EOF #undef DUK__BP_EQUALITY #undef DUK__BP_EXPONENTIATION #undef DUK__BP_FOR_EXPR #undef DUK__BP_INVALID #undef DUK__BP_LAND #undef DUK__BP_LOR #undef DUK__BP_MEMBER #undef DUK__BP_MULTIPLICATIVE #undef DUK__BP_POSTFIX #undef DUK__BP_RELATIONAL #undef DUK__BP_SHIFT #undef DUK__COMPILE_ENTRY_SLOTS #undef DUK__CONST_MARKER #undef DUK__DUMP_ISPEC #undef DUK__DUMP_IVALUE #undef DUK__EMIT_FLAG_A_IS_SOURCE #undef DUK__EMIT_FLAG_BC_REGCONST #undef DUK__EMIT_FLAG_B_IS_TARGET #undef DUK__EMIT_FLAG_C_IS_TARGET #undef DUK__EMIT_FLAG_NO_SHUFFLE_A #undef DUK__EMIT_FLAG_NO_SHUFFLE_B #undef DUK__EMIT_FLAG_NO_SHUFFLE_C #undef DUK__EMIT_FLAG_RESERVE_JUMPSLOT #undef DUK__EXPR_FLAG_ALLOW_EMPTY #undef DUK__EXPR_FLAG_REJECT_IN #undef DUK__EXPR_FLAG_REQUIRE_INIT #undef DUK__EXPR_RBP_MASK #undef DUK__FUNCTION_BODY_REQUIRE_SLOTS #undef DUK__FUNCTION_INIT_REQUIRE_SLOTS #undef DUK__FUNC_FLAG_DECL #undef DUK__FUNC_FLAG_GETSET #undef DUK__FUNC_FLAG_METDEF #undef DUK__FUNC_FLAG_PUSHNAME_PASS1 #undef DUK__FUNC_FLAG_USE_PREVTOKEN #undef DUK__GETCONST_MAX_CONSTS_CHECK #undef DUK__GETTEMP #undef DUK__HAS_TERM #undef DUK__HAS_VAL #undef DUK__ISCONST #undef DUK__ISREG #undef DUK__ISREG_NOTTEMP #undef DUK__ISREG_TEMP #undef DUK__IS_TERMINAL #undef DUK__IVAL_FLAG_ALLOW_CONST #undef DUK__IVAL_FLAG_REQUIRE_SHORT #undef DUK__IVAL_FLAG_REQUIRE_TEMP #undef DUK__MAX_ARRAY_INIT_VALUES #undef DUK__MAX_CONSTS #undef DUK__MAX_FUNCS #undef DUK__MAX_OBJECT_INIT_PAIRS #undef DUK__MAX_TEMPS #undef DUK__MK_LBP #undef DUK__MK_LBP_FLAGS #undef DUK__OBJ_LIT_KEY_GET #undef DUK__OBJ_LIT_KEY_PLAIN #undef DUK__OBJ_LIT_KEY_SET #undef DUK__PARSE_EXPR_SLOTS #undef DUK__PARSE_STATEMENTS_SLOTS #undef DUK__RECURSION_DECREASE #undef DUK__RECURSION_INCREASE #undef DUK__REMOVECONST #undef DUK__SETTEMP #undef DUK__SETTEMP_CHECKMAX #undef DUK__STILL_PROLOGUE #undef DUK__TOKEN_LBP_BP_MASK #undef DUK__TOKEN_LBP_FLAG_NO_REGEXP #undef DUK__TOKEN_LBP_FLAG_TERMINATES #undef DUK__TOKEN_LBP_FLAG_UNUSED #undef DUK__TOKEN_LBP_GET_BP /* * ECMAScript bytecode executor. */ /* #include duk_internal.h -> already included */ /* * Local declarations. */ DUK_LOCAL_DECL void duk__js_execute_bytecode_inner(duk_hthread *entry_thread, duk_activation *entry_act); /* * Misc helpers. */ /* Forced inline declaration, only applied for performance oriented build. */ #if defined(DUK_USE_EXEC_PREFER_SIZE) #define DUK__INLINE_PERF #define DUK__NOINLINE_PERF #else #define DUK__INLINE_PERF DUK_ALWAYS_INLINE #define DUK__NOINLINE_PERF DUK_NOINLINE #endif /* Replace value stack top to value at 'tv_ptr'. Optimize for * performance by only applying the net refcount change. */ #define DUK__REPLACE_TO_TVPTR(thr,tv_ptr) do { \ duk_hthread *duk__thr; \ duk_tval *duk__tvsrc; \ duk_tval *duk__tvdst; \ duk_tval duk__tvtmp; \ duk__thr = (thr); \ duk__tvsrc = DUK_GET_TVAL_NEGIDX(duk__thr, -1); \ duk__tvdst = (tv_ptr); \ DUK_TVAL_SET_TVAL(&duk__tvtmp, duk__tvdst); \ DUK_TVAL_SET_TVAL(duk__tvdst, duk__tvsrc); \ DUK_TVAL_SET_UNDEFINED(duk__tvsrc); /* value stack init policy */ \ duk__thr->valstack_top = duk__tvsrc; \ DUK_TVAL_DECREF(duk__thr, &duk__tvtmp); \ } while (0) /* XXX: candidate of being an internal shared API call */ #if 0 /* unused */ DUK_LOCAL void duk__push_tvals_incref_only(duk_hthread *thr, duk_tval *tv_src, duk_small_uint_fast_t count) { duk_tval *tv_dst; duk_size_t copy_size; duk_size_t i; tv_dst = thr->valstack_top; copy_size = sizeof(duk_tval) * count; duk_memcpy((void *) tv_dst, (const void *) tv_src, copy_size); for (i = 0; i < count; i++) { DUK_TVAL_INCREF(thr, tv_dst); tv_dst++; } thr->valstack_top = tv_dst; } #endif /* * Arithmetic, binary, and logical helpers. * * Note: there is no opcode for logical AND or logical OR; this is on * purpose, because the evalution order semantics for them make such * opcodes pretty pointless: short circuiting means they are most * comfortably implemented as jumps. However, a logical NOT opcode * is useful. * * Note: careful with duk_tval pointers here: they are potentially * invalidated by any DECREF and almost any API call. It's still * preferable to work without making a copy but that's not always * possible. */ DUK_LOCAL DUK__INLINE_PERF duk_double_t duk__compute_mod(duk_double_t d1, duk_double_t d2) { return (duk_double_t) duk_js_arith_mod((double) d1, (double) d2); } #if defined(DUK_USE_ES7_EXP_OPERATOR) DUK_LOCAL DUK__INLINE_PERF duk_double_t duk__compute_exp(duk_double_t d1, duk_double_t d2) { return (duk_double_t) duk_js_arith_pow((double) d1, (double) d2); } #endif DUK_LOCAL DUK__INLINE_PERF void duk__vm_arith_add(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_uint_fast_t idx_z) { /* * Addition operator is different from other arithmetic * operations in that it also provides string concatenation. * Hence it is implemented separately. * * There is a fast path for number addition. Other cases go * through potentially multiple coercions as described in the * E5 specification. It may be possible to reduce the number * of coercions, but this must be done carefully to preserve * the exact semantics. * * E5 Section 11.6.1. * * Custom types also have special behavior implemented here. */ duk_double_union du; DUK_ASSERT(thr != NULL); DUK_ASSERT(tv_x != NULL); /* may be reg or const */ DUK_ASSERT(tv_y != NULL); /* may be reg or const */ DUK_ASSERT_DISABLE(idx_z >= 0); /* unsigned */ DUK_ASSERT((duk_uint_t) idx_z < (duk_uint_t) duk_get_top(thr)); /* * Fast paths */ #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) { duk_int64_t v1, v2, v3; duk_int32_t v3_hi; duk_tval *tv_z; /* Input values are signed 48-bit so we can detect overflow * reliably from high bits or just a comparison. */ v1 = DUK_TVAL_GET_FASTINT(tv_x); v2 = DUK_TVAL_GET_FASTINT(tv_y); v3 = v1 + v2; v3_hi = (duk_int32_t) (v3 >> 32); if (DUK_LIKELY(v3_hi >= DUK_I64_CONSTANT(-0x8000) && v3_hi <= DUK_I64_CONSTANT(0x7fff))) { tv_z = thr->valstack_bottom + idx_z; DUK_TVAL_SET_FASTINT_UPDREF(thr, tv_z, v3); /* side effects */ return; } else { /* overflow, fall through */ ; } } #endif /* DUK_USE_FASTINT */ if (DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y)) { #if !defined(DUK_USE_EXEC_PREFER_SIZE) duk_tval *tv_z; #endif du.d = DUK_TVAL_GET_NUMBER(tv_x) + DUK_TVAL_GET_NUMBER(tv_y); #if defined(DUK_USE_EXEC_PREFER_SIZE) duk_push_number(thr, du.d); /* will NaN normalize result */ duk_replace(thr, (duk_idx_t) idx_z); #else /* DUK_USE_EXEC_PREFER_SIZE */ DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du); DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du)); tv_z = thr->valstack_bottom + idx_z; DUK_TVAL_SET_NUMBER_UPDREF(thr, tv_z, du.d); /* side effects */ #endif /* DUK_USE_EXEC_PREFER_SIZE */ return; } /* * Slow path: potentially requires function calls for coercion */ duk_push_tval(thr, tv_x); duk_push_tval(thr, tv_y); duk_to_primitive(thr, -2, DUK_HINT_NONE); /* side effects -> don't use tv_x, tv_y after */ duk_to_primitive(thr, -1, DUK_HINT_NONE); /* Since Duktape 2.x plain buffers are treated like ArrayBuffer. */ if (duk_is_string(thr, -2) || duk_is_string(thr, -1)) { /* Symbols shouldn't technically be handled here, but should * go into the default ToNumber() coercion path instead and * fail there with a TypeError. However, there's a ToString() * in duk_concat_2() which also fails with TypeError so no * explicit check is needed. */ duk_concat_2(thr); /* [... s1 s2] -> [... s1+s2] */ } else { duk_double_t d1, d2; d1 = duk_to_number_m2(thr); d2 = duk_to_number_m1(thr); DUK_ASSERT(duk_is_number(thr, -2)); DUK_ASSERT(duk_is_number(thr, -1)); DUK_ASSERT_DOUBLE_IS_NORMALIZED(d1); DUK_ASSERT_DOUBLE_IS_NORMALIZED(d2); du.d = d1 + d2; duk_pop_2_unsafe(thr); duk_push_number(thr, du.d); /* will NaN normalize result */ } duk_replace(thr, (duk_idx_t) idx_z); /* side effects */ } DUK_LOCAL DUK__INLINE_PERF void duk__vm_arith_binary_op(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_uint_fast_t idx_z, duk_small_uint_fast_t opcode) { /* * Arithmetic operations other than '+' have number-only semantics * and are implemented here. The separate switch-case here means a * "double dispatch" of the arithmetic opcode, but saves code space. * * E5 Sections 11.5, 11.5.1, 11.5.2, 11.5.3, 11.6, 11.6.1, 11.6.2, 11.6.3. */ duk_double_t d1, d2; duk_double_union du; duk_small_uint_fast_t opcode_shifted; #if defined(DUK_USE_FASTINT) || !defined(DUK_USE_EXEC_PREFER_SIZE) duk_tval *tv_z; #endif DUK_ASSERT(thr != NULL); DUK_ASSERT(tv_x != NULL); /* may be reg or const */ DUK_ASSERT(tv_y != NULL); /* may be reg or const */ DUK_ASSERT_DISABLE(idx_z >= 0); /* unsigned */ DUK_ASSERT((duk_uint_t) idx_z < (duk_uint_t) duk_get_top(thr)); opcode_shifted = opcode >> 2; /* Get base opcode without reg/const modifiers. */ #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) { duk_int64_t v1, v2, v3; duk_int32_t v3_hi; v1 = DUK_TVAL_GET_FASTINT(tv_x); v2 = DUK_TVAL_GET_FASTINT(tv_y); switch (opcode_shifted) { case DUK_OP_SUB >> 2: { v3 = v1 - v2; break; } case DUK_OP_MUL >> 2: { /* Must ensure result is 64-bit (no overflow); a * simple and sufficient fast path is to allow only * 32-bit inputs. Avoid zero inputs to avoid * negative zero issues (-1 * 0 = -0, for instance). */ if (v1 >= DUK_I64_CONSTANT(-0x80000000) && v1 <= DUK_I64_CONSTANT(0x7fffffff) && v1 != 0 && v2 >= DUK_I64_CONSTANT(-0x80000000) && v2 <= DUK_I64_CONSTANT(0x7fffffff) && v2 != 0) { v3 = v1 * v2; } else { goto skip_fastint; } break; } case DUK_OP_DIV >> 2: { /* Don't allow a zero divisor. Fast path check by * "verifying" with multiplication. Also avoid zero * dividend to avoid negative zero issues (0 / -1 = -0 * for instance). */ if (v1 == 0 || v2 == 0) { goto skip_fastint; } v3 = v1 / v2; if (v3 * v2 != v1) { goto skip_fastint; } break; } case DUK_OP_MOD >> 2: { /* Don't allow a zero divisor. Restrict both v1 and * v2 to positive values to avoid compiler specific * behavior. */ if (v1 < 1 || v2 < 1) { goto skip_fastint; } v3 = v1 % v2; DUK_ASSERT(v3 >= 0); DUK_ASSERT(v3 < v2); DUK_ASSERT(v1 - (v1 / v2) * v2 == v3); break; } default: { /* Possible with DUK_OP_EXP. */ goto skip_fastint; } } v3_hi = (duk_int32_t) (v3 >> 32); if (DUK_LIKELY(v3_hi >= DUK_I64_CONSTANT(-0x8000) && v3_hi <= DUK_I64_CONSTANT(0x7fff))) { tv_z = thr->valstack_bottom + idx_z; DUK_TVAL_SET_FASTINT_UPDREF(thr, tv_z, v3); /* side effects */ return; } /* fall through if overflow etc */ } skip_fastint: #endif /* DUK_USE_FASTINT */ if (DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y)) { /* fast path */ d1 = DUK_TVAL_GET_NUMBER(tv_x); d2 = DUK_TVAL_GET_NUMBER(tv_y); } else { duk_push_tval(thr, tv_x); duk_push_tval(thr, tv_y); d1 = duk_to_number_m2(thr); /* side effects */ d2 = duk_to_number_m1(thr); DUK_ASSERT(duk_is_number(thr, -2)); DUK_ASSERT(duk_is_number(thr, -1)); DUK_ASSERT_DOUBLE_IS_NORMALIZED(d1); DUK_ASSERT_DOUBLE_IS_NORMALIZED(d2); duk_pop_2_unsafe(thr); } switch (opcode_shifted) { case DUK_OP_SUB >> 2: { du.d = d1 - d2; break; } case DUK_OP_MUL >> 2: { du.d = d1 * d2; break; } case DUK_OP_DIV >> 2: { /* Division-by-zero is undefined behavior, so * rely on a helper. */ du.d = duk_double_div(d1, d2); break; } case DUK_OP_MOD >> 2: { du.d = duk__compute_mod(d1, d2); break; } #if defined(DUK_USE_ES7_EXP_OPERATOR) case DUK_OP_EXP >> 2: { du.d = duk__compute_exp(d1, d2); break; } #endif default: { DUK_UNREACHABLE(); du.d = DUK_DOUBLE_NAN; /* should not happen */ break; } } #if defined(DUK_USE_EXEC_PREFER_SIZE) duk_push_number(thr, du.d); /* will NaN normalize result */ duk_replace(thr, (duk_idx_t) idx_z); #else /* DUK_USE_EXEC_PREFER_SIZE */ /* important to use normalized NaN with 8-byte tagged types */ DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du); DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du)); tv_z = thr->valstack_bottom + idx_z; DUK_TVAL_SET_NUMBER_UPDREF(thr, tv_z, du.d); /* side effects */ #endif /* DUK_USE_EXEC_PREFER_SIZE */ } DUK_LOCAL DUK__INLINE_PERF void duk__vm_bitwise_binary_op(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_uint_fast_t idx_z, duk_small_uint_fast_t opcode) { /* * Binary bitwise operations use different coercions (ToInt32, ToUint32) * depending on the operation. We coerce the arguments first using * ToInt32(), and then cast to an 32-bit value if necessary. Note that * such casts must be correct even if there is no native 32-bit type * (e.g., duk_int32_t and duk_uint32_t are 64-bit). * * E5 Sections 11.10, 11.7.1, 11.7.2, 11.7.3 */ duk_int32_t i1, i2, i3; duk_uint32_t u1, u2, u3; #if defined(DUK_USE_FASTINT) duk_int64_t fi3; #else duk_double_t d3; #endif duk_small_uint_fast_t opcode_shifted; #if defined(DUK_USE_FASTINT) || !defined(DUK_USE_EXEC_PREFER_SIZE) duk_tval *tv_z; #endif DUK_ASSERT(thr != NULL); DUK_ASSERT(tv_x != NULL); /* may be reg or const */ DUK_ASSERT(tv_y != NULL); /* may be reg or const */ DUK_ASSERT_DISABLE(idx_z >= 0); /* unsigned */ DUK_ASSERT((duk_uint_t) idx_z < (duk_uint_t) duk_get_top(thr)); opcode_shifted = opcode >> 2; /* Get base opcode without reg/const modifiers. */ #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) { i1 = (duk_int32_t) DUK_TVAL_GET_FASTINT_I32(tv_x); i2 = (duk_int32_t) DUK_TVAL_GET_FASTINT_I32(tv_y); } else #endif /* DUK_USE_FASTINT */ { duk_push_tval(thr, tv_x); duk_push_tval(thr, tv_y); i1 = duk_to_int32(thr, -2); i2 = duk_to_int32(thr, -1); duk_pop_2_unsafe(thr); } switch (opcode_shifted) { case DUK_OP_BAND >> 2: { i3 = i1 & i2; break; } case DUK_OP_BOR >> 2: { i3 = i1 | i2; break; } case DUK_OP_BXOR >> 2: { i3 = i1 ^ i2; break; } case DUK_OP_BASL >> 2: { /* Signed shift, named "arithmetic" (asl) because the result * is signed, e.g. 4294967295 << 1 -> -2. Note that result * must be masked. */ u2 = ((duk_uint32_t) i2) & 0xffffffffUL; i3 = (duk_int32_t) (((duk_uint32_t) i1) << (u2 & 0x1fUL)); /* E5 Section 11.7.1, steps 7 and 8 */ i3 = i3 & ((duk_int32_t) 0xffffffffUL); /* Note: left shift, should mask */ break; } case DUK_OP_BASR >> 2: { /* signed shift */ u2 = ((duk_uint32_t) i2) & 0xffffffffUL; i3 = i1 >> (u2 & 0x1fUL); /* E5 Section 11.7.2, steps 7 and 8 */ break; } case DUK_OP_BLSR >> 2: { /* unsigned shift */ u1 = ((duk_uint32_t) i1) & 0xffffffffUL; u2 = ((duk_uint32_t) i2) & 0xffffffffUL; /* special result value handling */ u3 = u1 >> (u2 & 0x1fUL); /* E5 Section 11.7.2, steps 7 and 8 */ #if defined(DUK_USE_FASTINT) fi3 = (duk_int64_t) u3; goto fastint_result_set; #else d3 = (duk_double_t) u3; goto result_set; #endif } default: { DUK_UNREACHABLE(); i3 = 0; /* should not happen */ break; } } #if defined(DUK_USE_FASTINT) /* Result is always fastint compatible. */ /* XXX: Set 32-bit result (but must then handle signed and * unsigned results separately). */ fi3 = (duk_int64_t) i3; fastint_result_set: tv_z = thr->valstack_bottom + idx_z; DUK_TVAL_SET_FASTINT_UPDREF(thr, tv_z, fi3); /* side effects */ #else /* DUK_USE_FASTINT */ d3 = (duk_double_t) i3; result_set: DUK_ASSERT(!DUK_ISNAN(d3)); /* 'd3' is never NaN, so no need to normalize */ DUK_ASSERT_DOUBLE_IS_NORMALIZED(d3); /* always normalized */ #if defined(DUK_USE_EXEC_PREFER_SIZE) duk_push_number(thr, d3); /* would NaN normalize result, but unnecessary */ duk_replace(thr, (duk_idx_t) idx_z); #else /* DUK_USE_EXEC_PREFER_SIZE */ tv_z = thr->valstack_bottom + idx_z; DUK_TVAL_SET_NUMBER_UPDREF(thr, tv_z, d3); /* side effects */ #endif /* DUK_USE_EXEC_PREFER_SIZE */ #endif /* DUK_USE_FASTINT */ } /* In-place unary operation. */ DUK_LOCAL DUK__INLINE_PERF void duk__vm_arith_unary_op(duk_hthread *thr, duk_uint_fast_t idx_src, duk_uint_fast_t idx_dst, duk_small_uint_fast_t opcode) { /* * Arithmetic operations other than '+' have number-only semantics * and are implemented here. The separate switch-case here means a * "double dispatch" of the arithmetic opcode, but saves code space. * * E5 Sections 11.5, 11.5.1, 11.5.2, 11.5.3, 11.6, 11.6.1, 11.6.2, 11.6.3. */ duk_tval *tv; duk_double_t d1; duk_double_union du; DUK_ASSERT(thr != NULL); DUK_ASSERT(opcode == DUK_OP_UNM || opcode == DUK_OP_UNP); DUK_ASSERT_DISABLE(idx_src >= 0); DUK_ASSERT_DISABLE(idx_dst >= 0); tv = DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_src); #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv)) { duk_int64_t v1, v2; v1 = DUK_TVAL_GET_FASTINT(tv); if (opcode == DUK_OP_UNM) { /* The smallest fastint is no longer 48-bit when * negated. Positive zero becames negative zero * (cannot be represented) when negated. */ if (DUK_LIKELY(v1 != DUK_FASTINT_MIN && v1 != 0)) { v2 = -v1; tv = DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_dst); DUK_TVAL_SET_FASTINT_UPDREF(thr, tv, v2); return; } } else { /* ToNumber() for a fastint is a no-op. */ DUK_ASSERT(opcode == DUK_OP_UNP); v2 = v1; tv = DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_dst); DUK_TVAL_SET_FASTINT_UPDREF(thr, tv, v2); return; } /* fall through if overflow etc */ } #endif /* DUK_USE_FASTINT */ if (DUK_TVAL_IS_NUMBER(tv)) { d1 = DUK_TVAL_GET_NUMBER(tv); } else { d1 = duk_to_number_tval(thr, tv); /* side effects */ } if (opcode == DUK_OP_UNP) { /* ToNumber() for a double is a no-op, but unary plus is * used to force a fastint check so do that here. */ du.d = d1; DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du)); #if defined(DUK_USE_FASTINT) tv = DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_dst); DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF(thr, tv, du.d); /* always 'fast', i.e. inlined */ return; #endif } else { DUK_ASSERT(opcode == DUK_OP_UNM); du.d = -d1; DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du); /* mandatory if du.d is a NaN */ DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du)); } /* XXX: size optimize: push+replace? */ tv = DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_dst); DUK_TVAL_SET_NUMBER_UPDREF(thr, tv, du.d); } DUK_LOCAL DUK__INLINE_PERF void duk__vm_bitwise_not(duk_hthread *thr, duk_uint_fast_t idx_src, duk_uint_fast_t idx_dst) { /* * E5 Section 11.4.8 */ duk_tval *tv; duk_int32_t i1, i2; DUK_ASSERT(thr != NULL); DUK_ASSERT_DISABLE(idx_src >= 0); DUK_ASSERT_DISABLE(idx_dst >= 0); DUK_ASSERT((duk_uint_t) idx_src < (duk_uint_t) duk_get_top(thr)); DUK_ASSERT((duk_uint_t) idx_dst < (duk_uint_t) duk_get_top(thr)); tv = DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_src); #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv)) { i1 = (duk_int32_t) DUK_TVAL_GET_FASTINT_I32(tv); } else #endif /* DUK_USE_FASTINT */ { duk_push_tval(thr, tv); i1 = duk_to_int32(thr, -1); /* side effects */ duk_pop_unsafe(thr); } /* Result is always fastint compatible. */ i2 = ~i1; tv = DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_dst); DUK_TVAL_SET_I32_UPDREF(thr, tv, i2); /* side effects */ } DUK_LOCAL DUK__INLINE_PERF void duk__vm_logical_not(duk_hthread *thr, duk_uint_fast_t idx_src, duk_uint_fast_t idx_dst) { /* * E5 Section 11.4.9 */ duk_tval *tv; duk_bool_t res; DUK_ASSERT(thr != NULL); DUK_ASSERT_DISABLE(idx_src >= 0); DUK_ASSERT_DISABLE(idx_dst >= 0); DUK_ASSERT((duk_uint_t) idx_src < (duk_uint_t) duk_get_top(thr)); DUK_ASSERT((duk_uint_t) idx_dst < (duk_uint_t) duk_get_top(thr)); /* ToBoolean() does not require any operations with side effects so * we can do it efficiently. For footprint it would be better to use * duk_js_toboolean() and then push+replace to the result slot. */ tv = DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_src); res = duk_js_toboolean(tv); /* does not modify 'tv' */ DUK_ASSERT(res == 0 || res == 1); res ^= 1; tv = DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_dst); /* XXX: size optimize: push+replace? */ DUK_TVAL_SET_BOOLEAN_UPDREF(thr, tv, res); /* side effects */ } /* XXX: size optimized variant */ DUK_LOCAL DUK__INLINE_PERF void duk__prepost_incdec_reg_helper(duk_hthread *thr, duk_tval *tv_dst, duk_tval *tv_src, duk_small_uint_t op) { duk_double_t x, y, z; /* Two lowest bits of opcode are used to distinguish * variants. Bit 0 = inc(0)/dec(1), bit 1 = pre(0)/post(1). */ DUK_ASSERT((DUK_OP_PREINCR & 0x03) == 0x00); DUK_ASSERT((DUK_OP_PREDECR & 0x03) == 0x01); DUK_ASSERT((DUK_OP_POSTINCR & 0x03) == 0x02); DUK_ASSERT((DUK_OP_POSTDECR & 0x03) == 0x03); #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_src)) { duk_int64_t x_fi, y_fi, z_fi; x_fi = DUK_TVAL_GET_FASTINT(tv_src); if (op & 0x01) { if (DUK_UNLIKELY(x_fi == DUK_FASTINT_MIN)) { goto skip_fastint; } y_fi = x_fi - 1; } else { if (DUK_UNLIKELY(x_fi == DUK_FASTINT_MAX)) { goto skip_fastint; } y_fi = x_fi + 1; } DUK_TVAL_SET_FASTINT(tv_src, y_fi); /* no need for refcount update */ z_fi = (op & 0x02) ? x_fi : y_fi; DUK_TVAL_SET_FASTINT_UPDREF(thr, tv_dst, z_fi); /* side effects */ return; } skip_fastint: #endif if (DUK_TVAL_IS_NUMBER(tv_src)) { /* Fast path for the case where the register * is a number (e.g. loop counter). */ x = DUK_TVAL_GET_NUMBER(tv_src); if (op & 0x01) { y = x - 1.0; } else { y = x + 1.0; } DUK_TVAL_SET_NUMBER(tv_src, y); /* no need for refcount update */ } else { /* Preserve duk_tval pointer(s) across a potential valstack * resize by converting them into offsets temporarily. */ duk_idx_t bc; duk_size_t off_dst; off_dst = (duk_size_t) ((duk_uint8_t *) tv_dst - (duk_uint8_t *) thr->valstack_bottom); bc = (duk_idx_t) (tv_src - thr->valstack_bottom); /* XXX: pass index explicitly? */ tv_src = NULL; /* no longer referenced */ x = duk_to_number(thr, bc); if (op & 0x01) { y = x - 1.0; } else { y = x + 1.0; } duk_push_number(thr, y); duk_replace(thr, bc); tv_dst = (duk_tval *) (void *) (((duk_uint8_t *) thr->valstack_bottom) + off_dst); } z = (op & 0x02) ? x : y; DUK_TVAL_SET_NUMBER_UPDREF(thr, tv_dst, z); /* side effects */ } DUK_LOCAL DUK__INLINE_PERF void duk__prepost_incdec_var_helper(duk_hthread *thr, duk_small_uint_t idx_dst, duk_tval *tv_id, duk_small_uint_t op, duk_small_uint_t is_strict) { duk_activation *act; duk_double_t x, y; duk_hstring *name; /* XXX: The pre/post inc/dec for an identifier lookup is * missing the important fast path where the identifier * has a storage location e.g. in a scope object so that * it can be updated in-place. In particular, the case * where the identifier has a storage location AND the * previous value is a number should be optimized because * it's side effect free. */ /* Two lowest bits of opcode are used to distinguish * variants. Bit 0 = inc(0)/dec(1), bit 1 = pre(0)/post(1). */ DUK_ASSERT((DUK_OP_PREINCV & 0x03) == 0x00); DUK_ASSERT((DUK_OP_PREDECV & 0x03) == 0x01); DUK_ASSERT((DUK_OP_POSTINCV & 0x03) == 0x02); DUK_ASSERT((DUK_OP_POSTDECV & 0x03) == 0x03); DUK_ASSERT(DUK_TVAL_IS_STRING(tv_id)); name = DUK_TVAL_GET_STRING(tv_id); DUK_ASSERT(name != NULL); act = thr->callstack_curr; (void) duk_js_getvar_activation(thr, act, name, 1 /*throw*/); /* -> [ ... val this ] */ /* XXX: Fastint fast path would be useful here. Also fastints * now lose their fastint status in current handling which is * not intuitive. */ x = duk_to_number_m2(thr); if (op & 0x01) { y = x - 1.0; } else { y = x + 1.0; } /* [... x this] */ if (op & 0x02) { duk_push_number(thr, y); /* -> [ ... x this y ] */ DUK_ASSERT(act == thr->callstack_curr); duk_js_putvar_activation(thr, act, name, DUK_GET_TVAL_NEGIDX(thr, -1), is_strict); duk_pop_2_unsafe(thr); /* -> [ ... x ] */ } else { duk_pop_2_unsafe(thr); /* -> [ ... ] */ duk_push_number(thr, y); /* -> [ ... y ] */ DUK_ASSERT(act == thr->callstack_curr); duk_js_putvar_activation(thr, act, name, DUK_GET_TVAL_NEGIDX(thr, -1), is_strict); } #if defined(DUK_USE_EXEC_PREFER_SIZE) duk_replace(thr, (duk_idx_t) idx_dst); #else /* DUK_USE_EXEC_PREFER_SIZE */ DUK__REPLACE_TO_TVPTR(thr, DUK_GET_TVAL_POSIDX(thr, (duk_idx_t) idx_dst)); #endif /* DUK_USE_EXEC_PREFER_SIZE */ } /* * Longjmp and other control flow transfer for the bytecode executor. * * The longjmp handler can handle all longjmp types: error, yield, and * resume (pseudotypes are never actually thrown). * * Error policy for longjmp: should not ordinarily throw errors; if errors * occur (e.g. due to out-of-memory) they bubble outwards rather than being * handled recursively. */ #define DUK__LONGJMP_RESTART 0 /* state updated, restart bytecode execution */ #define DUK__LONGJMP_RETHROW 1 /* exit bytecode executor by rethrowing an error to caller */ #define DUK__RETHAND_RESTART 0 /* state updated, restart bytecode execution */ #define DUK__RETHAND_FINISHED 1 /* exit bytecode execution with return value */ /* XXX: optimize reconfig valstack operations so that resize, clamp, and setting * top are combined into one pass. */ /* Reconfigure value stack for return to an ECMAScript function at * callstack top (caller unwinds). */ DUK_LOCAL void duk__reconfig_valstack_ecma_return(duk_hthread *thr) { duk_activation *act; duk_hcompfunc *h_func; duk_idx_t clamp_top; DUK_ASSERT(thr != NULL); act = thr->callstack_curr; DUK_ASSERT(act != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(act) != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(act))); /* Clamp so that values at 'clamp_top' and above are wiped and won't * retain reachable garbage. Then extend to 'nregs' because we're * returning to an ECMAScript function. */ h_func = (duk_hcompfunc *) DUK_ACT_GET_FUNC(act); thr->valstack_bottom = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + act->bottom_byteoff); DUK_ASSERT(act->retval_byteoff >= act->bottom_byteoff); clamp_top = (duk_idx_t) ((act->retval_byteoff - act->bottom_byteoff + sizeof(duk_tval)) / sizeof(duk_tval)); /* +1 = one retval */ duk_set_top_and_wipe(thr, h_func->nregs, clamp_top); DUK_ASSERT((duk_uint8_t *) thr->valstack_end >= (duk_uint8_t *) thr->valstack + act->reserve_byteoff); thr->valstack_end = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + act->reserve_byteoff); /* XXX: a best effort shrink check would be OK here */ } /* Reconfigure value stack for an ECMAScript catcher. Use topmost catcher * in 'act'. */ DUK_LOCAL void duk__reconfig_valstack_ecma_catcher(duk_hthread *thr, duk_activation *act) { duk_catcher *cat; duk_hcompfunc *h_func; duk_size_t idx_bottom; duk_idx_t clamp_top; DUK_ASSERT(thr != NULL); DUK_ASSERT(act != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(act) != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(act))); cat = act->cat; DUK_ASSERT(cat != NULL); h_func = (duk_hcompfunc *) DUK_ACT_GET_FUNC(act); thr->valstack_bottom = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + act->bottom_byteoff); idx_bottom = (duk_size_t) (thr->valstack_bottom - thr->valstack); DUK_ASSERT(cat->idx_base >= idx_bottom); clamp_top = (duk_idx_t) (cat->idx_base - idx_bottom + 2); /* +2 = catcher value, catcher lj_type */ duk_set_top_and_wipe(thr, h_func->nregs, clamp_top); DUK_ASSERT((duk_uint8_t *) thr->valstack_end >= (duk_uint8_t *) thr->valstack + act->reserve_byteoff); thr->valstack_end = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + act->reserve_byteoff); /* XXX: a best effort shrink check would be OK here */ } /* Set catcher regs: idx_base+0 = value, idx_base+1 = lj_type. * No side effects. */ DUK_LOCAL void duk__set_catcher_regs_norz(duk_hthread *thr, duk_catcher *cat, duk_tval *tv_val_unstable, duk_small_uint_t lj_type) { duk_tval *tv1; DUK_ASSERT(thr != NULL); DUK_ASSERT(tv_val_unstable != NULL); tv1 = thr->valstack + cat->idx_base; DUK_ASSERT(tv1 < thr->valstack_top); DUK_TVAL_SET_TVAL_UPDREF_NORZ(thr, tv1, tv_val_unstable); tv1++; DUK_ASSERT(tv1 == thr->valstack + cat->idx_base + 1); DUK_ASSERT(tv1 < thr->valstack_top); DUK_TVAL_SET_U32_UPDREF_NORZ(thr, tv1, (duk_uint32_t) lj_type); } DUK_LOCAL void duk__handle_catch_part1(duk_hthread *thr, duk_tval *tv_val_unstable, duk_small_uint_t lj_type, volatile duk_bool_t *out_delayed_catch_setup) { duk_activation *act; duk_catcher *cat; DUK_ASSERT(thr != NULL); DUK_ASSERT(tv_val_unstable != NULL); act = thr->callstack_curr; DUK_ASSERT(act != NULL); DUK_DD(DUK_DDPRINT("handle catch, part 1; act=%!A, cat=%!C", act, act->cat)); DUK_ASSERT(act->cat != NULL); DUK_ASSERT(DUK_CAT_GET_TYPE(act->cat) == DUK_CAT_TYPE_TCF); /* The part1/part2 split could also be made here at the very top * of catch handling. Value stack would be reconfigured inside * part2's protection. Value stack reconfiguration should be free * of allocs, however. */ duk__set_catcher_regs_norz(thr, act->cat, tv_val_unstable, lj_type); DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr) != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr))); DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); duk__reconfig_valstack_ecma_catcher(thr, act); DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); cat = act->cat; DUK_ASSERT(cat != NULL); act->curr_pc = cat->pc_base + 0; /* +0 = catch */ /* * If the catch block has an automatic catch variable binding, * we need to create a lexical environment for it which requires * allocations. Move out of "error handling state" before the * allocations to avoid e.g. out-of-memory errors (leading to * GH-2022 or similar). */ if (DUK_CAT_HAS_CATCH_BINDING_ENABLED(cat)) { DUK_DDD(DUK_DDDPRINT("catcher has an automatic catch binding, handle in part 2")); *out_delayed_catch_setup = 1; } else { DUK_DDD(DUK_DDDPRINT("catcher has no catch binding")); } DUK_CAT_CLEAR_CATCH_ENABLED(cat); } DUK_LOCAL void duk__handle_catch_part2(duk_hthread *thr) { duk_activation *act; duk_catcher *cat; duk_hdecenv *new_env; DUK_ASSERT(thr != NULL); act = thr->callstack_curr; DUK_ASSERT(act != NULL); DUK_DD(DUK_DDPRINT("handle catch, part 2; act=%!A, cat=%!C", act, act->cat)); DUK_ASSERT(act->cat != NULL); cat = act->cat; DUK_ASSERT(cat != NULL); DUK_ASSERT(DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_TCF); DUK_ASSERT(DUK_CAT_HAS_CATCH_BINDING_ENABLED(cat)); DUK_ASSERT(thr->valstack + cat->idx_base < thr->valstack_top); /* * Create lexical environment for the catch clause, containing * a binding for the caught value. * * The binding is mutable (= writable) but not deletable. * Step 4 for the catch production in E5 Section 12.14; * no value is given for CreateMutableBinding 'D' argument, * which implies the binding is not deletable. */ if (act->lex_env == NULL) { DUK_ASSERT(act->var_env == NULL); DUK_DDD(DUK_DDDPRINT("delayed environment initialization")); duk_js_init_activation_environment_records_delayed(thr, act); DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); } DUK_ASSERT(act->lex_env != NULL); DUK_ASSERT(act->var_env != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(act) != NULL); new_env = duk_hdecenv_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV)); DUK_ASSERT(new_env != NULL); duk_push_hobject(thr, (duk_hobject *) new_env); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) new_env) == NULL); DUK_DDD(DUK_DDDPRINT("new_env allocated: %!iO", (duk_heaphdr *) new_env)); /* Note: currently the catch binding is handled without a register * binding because we don't support dynamic register bindings (they * must be fixed for an entire function). So, there is no need to * record regbases etc. */ /* [ ...env ] */ DUK_ASSERT(cat->h_varname != NULL); duk_push_hstring(thr, cat->h_varname); DUK_ASSERT(thr->valstack + cat->idx_base < thr->valstack_top); duk_push_tval(thr, thr->valstack + cat->idx_base); duk_xdef_prop(thr, -3, DUK_PROPDESC_FLAGS_W); /* writable, not configurable */ /* [ ... env ] */ DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); DUK_HOBJECT_SET_PROTOTYPE(thr->heap, (duk_hobject *) new_env, act->lex_env); act->lex_env = (duk_hobject *) new_env; DUK_HOBJECT_INCREF(thr, (duk_hobject *) new_env); /* reachable through activation */ /* Net refcount change to act->lex_env is 0: incref for new_env's * prototype, decref for act->lex_env overwrite. */ DUK_CAT_SET_LEXENV_ACTIVE(cat); duk_pop_unsafe(thr); DUK_DDD(DUK_DDDPRINT("new_env finished: %!iO", (duk_heaphdr *) new_env)); } DUK_LOCAL void duk__handle_finally(duk_hthread *thr, duk_tval *tv_val_unstable, duk_small_uint_t lj_type) { duk_activation *act; duk_catcher *cat; DUK_ASSERT(thr != NULL); DUK_ASSERT(tv_val_unstable != NULL); act = thr->callstack_curr; DUK_ASSERT(act != NULL); DUK_ASSERT(act->cat != NULL); DUK_ASSERT(DUK_CAT_GET_TYPE(act->cat) == DUK_CAT_TYPE_TCF); duk__set_catcher_regs_norz(thr, act->cat, tv_val_unstable, lj_type); DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr) != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr))); DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); duk__reconfig_valstack_ecma_catcher(thr, act); DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); cat = act->cat; DUK_ASSERT(cat != NULL); act->curr_pc = cat->pc_base + 1; /* +1 = finally */ DUK_CAT_CLEAR_FINALLY_ENABLED(cat); } DUK_LOCAL void duk__handle_label(duk_hthread *thr, duk_small_uint_t lj_type) { duk_activation *act; duk_catcher *cat; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->callstack_top >= 1); act = thr->callstack_curr; DUK_ASSERT(act != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(act) != NULL); DUK_ASSERT(DUK_HOBJECT_HAS_COMPFUNC(DUK_ACT_GET_FUNC(act))); /* +0 = break, +1 = continue */ cat = act->cat; DUK_ASSERT(cat != NULL); DUK_ASSERT(DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_LABEL); act->curr_pc = cat->pc_base + (lj_type == DUK_LJ_TYPE_CONTINUE ? 1 : 0); /* valstack should not need changes */ #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack_bottom) == (duk_size_t) ((duk_hcompfunc *) DUK_ACT_GET_FUNC(act))->nregs); #endif } /* Called for handling both a longjmp() with type DUK_LJ_TYPE_YIELD and * when a RETURN opcode terminates a thread and yields to the resumer. * Caller unwinds so that top of callstack is the activation we return to. */ #if defined(DUK_USE_COROUTINE_SUPPORT) DUK_LOCAL void duk__handle_yield(duk_hthread *thr, duk_hthread *resumer, duk_tval *tv_val_unstable) { duk_activation *act_resumer; duk_tval *tv1; DUK_ASSERT(thr != NULL); DUK_ASSERT(resumer != NULL); DUK_ASSERT(tv_val_unstable != NULL); act_resumer = resumer->callstack_curr; DUK_ASSERT(act_resumer != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(act_resumer) != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(act_resumer))); /* resume caller must be an ECMAScript func */ tv1 = (duk_tval *) (void *) ((duk_uint8_t *) resumer->valstack + act_resumer->retval_byteoff); /* return value from Duktape.Thread.resume() */ DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv_val_unstable); /* side effects */ /* XXX: avoid side effects */ duk__reconfig_valstack_ecma_return(resumer); /* caller must change active thread, and set thr->resumer to NULL */ } #endif /* DUK_USE_COROUTINE_SUPPORT */ DUK_LOCAL duk_small_uint_t duk__handle_longjmp(duk_hthread *thr, duk_activation *entry_act, volatile duk_bool_t *out_delayed_catch_setup) { duk_small_uint_t retval = DUK__LONGJMP_RESTART; DUK_ASSERT(thr != NULL); DUK_ASSERT(entry_act != NULL); /* 'thr' is the current thread, as no-one resumes except us and we * switch 'thr' in that case. */ DUK_ASSERT(thr == thr->heap->curr_thread); /* * (Re)try handling the longjmp. * * A longjmp handler may convert the longjmp to a different type and * "virtually" rethrow by goto'ing to 'check_longjmp'. Before the goto, * the following must be updated: * - the heap 'lj' state * - 'thr' must reflect the "throwing" thread */ check_longjmp: DUK_DD(DUK_DDPRINT("handling longjmp: type=%ld, value1=%!T, value2=%!T, iserror=%ld, top=%ld", (long) thr->heap->lj.type, (duk_tval *) &thr->heap->lj.value1, (duk_tval *) &thr->heap->lj.value2, (long) thr->heap->lj.iserror, (long) duk_get_top(thr))); switch (thr->heap->lj.type) { #if defined(DUK_USE_COROUTINE_SUPPORT) case DUK_LJ_TYPE_RESUME: { /* * Note: lj.value1 is 'value', lj.value2 is 'resumee'. * This differs from YIELD. */ duk_tval *tv; duk_tval *tv2; duk_hthread *resumee; /* duk_bi_duk_object_yield() and duk_bi_duk_object_resume() ensure all of these are met */ DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING); /* unchanged by Duktape.Thread.resume() */ DUK_ASSERT(thr->callstack_top >= 2); /* ECMAScript activation + Duktape.Thread.resume() activation */ DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(thr->callstack_curr->parent != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr) != NULL && DUK_HOBJECT_IS_NATFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr)) && ((duk_hnatfunc *) DUK_ACT_GET_FUNC(thr->callstack_curr))->func == duk_bi_thread_resume); tv = &thr->heap->lj.value2; /* resumee */ DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv)); DUK_ASSERT(DUK_TVAL_GET_OBJECT(tv) != NULL); DUK_ASSERT(DUK_HOBJECT_IS_THREAD(DUK_TVAL_GET_OBJECT(tv))); resumee = (duk_hthread *) DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(resumee != NULL); DUK_ASSERT(resumee->resumer == NULL); DUK_ASSERT(resumee->state == DUK_HTHREAD_STATE_INACTIVE || resumee->state == DUK_HTHREAD_STATE_YIELDED); /* checked by Duktape.Thread.resume() */ DUK_ASSERT(resumee->state != DUK_HTHREAD_STATE_YIELDED || resumee->callstack_top >= 2); /* YIELDED: ECMAScript activation + Duktape.Thread.yield() activation */ DUK_ASSERT(resumee->state != DUK_HTHREAD_STATE_YIELDED || (DUK_ACT_GET_FUNC(resumee->callstack_curr) != NULL && DUK_HOBJECT_IS_NATFUNC(DUK_ACT_GET_FUNC(resumee->callstack_curr)) && ((duk_hnatfunc *) DUK_ACT_GET_FUNC(resumee->callstack_curr))->func == duk_bi_thread_yield)); DUK_ASSERT(resumee->state != DUK_HTHREAD_STATE_INACTIVE || resumee->callstack_top == 0); /* INACTIVE: no activation, single function value on valstack */ if (thr->heap->lj.iserror) { /* * Throw the error in the resumed thread's context; the * error value is pushed onto the resumee valstack. * * Note: the callstack of the target may empty in this case * too (i.e. the target thread has never been resumed). The * value stack will contain the initial function in that case, * which we simply ignore. */ DUK_ASSERT(resumee->resumer == NULL); resumee->resumer = thr; DUK_HTHREAD_INCREF(thr, thr); resumee->state = DUK_HTHREAD_STATE_RUNNING; thr->state = DUK_HTHREAD_STATE_RESUMED; DUK_HEAP_SWITCH_THREAD(thr->heap, resumee); thr = resumee; thr->heap->lj.type = DUK_LJ_TYPE_THROW; /* thr->heap->lj.value1 is already the value to throw */ /* thr->heap->lj.value2 is 'thread', will be wiped out at the end */ DUK_ASSERT(thr->heap->lj.iserror); /* already set */ DUK_DD(DUK_DDPRINT("-> resume with an error, converted to a throw in the resumee, propagate")); goto check_longjmp; } else if (resumee->state == DUK_HTHREAD_STATE_YIELDED) { /* Unwind previous Duktape.Thread.yield() call. The * activation remaining must always be an ECMAScript * call now (yield() accepts calls from ECMAScript * only). */ duk_activation *act_resumee; DUK_ASSERT(resumee->callstack_top >= 2); act_resumee = resumee->callstack_curr; /* Duktape.Thread.yield() */ DUK_ASSERT(act_resumee != NULL); act_resumee = act_resumee->parent; /* ECMAScript call site for yield() */ DUK_ASSERT(act_resumee != NULL); tv = (duk_tval *) (void *) ((duk_uint8_t *) resumee->valstack + act_resumee->retval_byteoff); /* return value from Duktape.Thread.yield() */ DUK_ASSERT(tv >= resumee->valstack && tv < resumee->valstack_top); tv2 = &thr->heap->lj.value1; DUK_TVAL_SET_TVAL_UPDREF(thr, tv, tv2); /* side effects */ /* XXX: avoid side effects */ duk_hthread_activation_unwind_norz(resumee); /* unwind to 'yield' caller */ /* no need to unwind catch stack */ duk__reconfig_valstack_ecma_return(resumee); DUK_ASSERT(resumee->resumer == NULL); resumee->resumer = thr; DUK_HTHREAD_INCREF(thr, thr); resumee->state = DUK_HTHREAD_STATE_RUNNING; thr->state = DUK_HTHREAD_STATE_RESUMED; DUK_HEAP_SWITCH_THREAD(thr->heap, resumee); #if 0 thr = resumee; /* not needed, as we exit right away */ #endif DUK_DD(DUK_DDPRINT("-> resume with a value, restart execution in resumee")); retval = DUK__LONGJMP_RESTART; goto wipe_and_return; } else { /* Initial resume call. */ duk_small_uint_t call_flags; duk_int_t setup_rc; /* resumee: [... initial_func] (currently actually: [initial_func]) */ duk_push_undefined(resumee); tv = &thr->heap->lj.value1; duk_push_tval(resumee, tv); /* resumee: [... initial_func undefined(= this) resume_value ] */ call_flags = DUK_CALL_FLAG_ALLOW_ECMATOECMA; /* not tailcall, ecma-to-ecma (assumed to succeed) */ setup_rc = duk_handle_call_unprotected_nargs(resumee, 1 /*nargs*/, call_flags); if (setup_rc == 0) { /* This shouldn't happen; Duktape.Thread.resume() * should make sure of that. If it does happen * this internal error will propagate out of the * executor which can be quite misleading. */ DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return 0;); } DUK_ASSERT(resumee->resumer == NULL); resumee->resumer = thr; DUK_HTHREAD_INCREF(thr, thr); resumee->state = DUK_HTHREAD_STATE_RUNNING; thr->state = DUK_HTHREAD_STATE_RESUMED; DUK_HEAP_SWITCH_THREAD(thr->heap, resumee); #if 0 thr = resumee; /* not needed, as we exit right away */ #endif DUK_DD(DUK_DDPRINT("-> resume with a value, restart execution in resumee")); retval = DUK__LONGJMP_RESTART; goto wipe_and_return; } DUK_UNREACHABLE(); break; /* never here */ } case DUK_LJ_TYPE_YIELD: { /* * Currently only allowed only if yielding thread has only * ECMAScript activations (except for the Duktape.Thread.yield() * call at the callstack top) and none of them constructor * calls. * * This excludes the 'entry' thread which will always have * a preventcount > 0. */ duk_hthread *resumer; /* duk_bi_duk_object_yield() and duk_bi_duk_object_resume() ensure all of these are met */ #if 0 /* entry_thread not available for assert */ DUK_ASSERT(thr != entry_thread); /* Duktape.Thread.yield() should prevent */ #endif DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING); /* unchanged from Duktape.Thread.yield() */ DUK_ASSERT(thr->callstack_top >= 2); /* ECMAScript activation + Duktape.Thread.yield() activation */ DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(thr->callstack_curr->parent != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr) != NULL && DUK_HOBJECT_IS_NATFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr)) && ((duk_hnatfunc *) DUK_ACT_GET_FUNC(thr->callstack_curr))->func == duk_bi_thread_yield); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr->parent) != NULL && DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr->parent))); /* an ECMAScript function */ resumer = thr->resumer; DUK_ASSERT(resumer != NULL); DUK_ASSERT(resumer->state == DUK_HTHREAD_STATE_RESUMED); /* written by a previous RESUME handling */ DUK_ASSERT(resumer->callstack_top >= 2); /* ECMAScript activation + Duktape.Thread.resume() activation */ DUK_ASSERT(resumer->callstack_curr != NULL); DUK_ASSERT(resumer->callstack_curr->parent != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(resumer->callstack_curr) != NULL && DUK_HOBJECT_IS_NATFUNC(DUK_ACT_GET_FUNC(resumer->callstack_curr)) && ((duk_hnatfunc *) DUK_ACT_GET_FUNC(resumer->callstack_curr))->func == duk_bi_thread_resume); DUK_ASSERT(DUK_ACT_GET_FUNC(resumer->callstack_curr->parent) != NULL && DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(resumer->callstack_curr->parent))); /* an ECMAScript function */ if (thr->heap->lj.iserror) { thr->state = DUK_HTHREAD_STATE_YIELDED; thr->resumer = NULL; DUK_HTHREAD_DECREF_NORZ(thr, resumer); resumer->state = DUK_HTHREAD_STATE_RUNNING; DUK_HEAP_SWITCH_THREAD(thr->heap, resumer); thr = resumer; thr->heap->lj.type = DUK_LJ_TYPE_THROW; /* lj.value1 is already set */ DUK_ASSERT(thr->heap->lj.iserror); /* already set */ DUK_DD(DUK_DDPRINT("-> yield an error, converted to a throw in the resumer, propagate")); goto check_longjmp; } else { duk_hthread_activation_unwind_norz(resumer); duk__handle_yield(thr, resumer, &thr->heap->lj.value1); thr->state = DUK_HTHREAD_STATE_YIELDED; thr->resumer = NULL; DUK_HTHREAD_DECREF_NORZ(thr, resumer); resumer->state = DUK_HTHREAD_STATE_RUNNING; DUK_HEAP_SWITCH_THREAD(thr->heap, resumer); #if 0 thr = resumer; /* not needed, as we exit right away */ #endif DUK_DD(DUK_DDPRINT("-> yield a value, restart execution in resumer")); retval = DUK__LONGJMP_RESTART; goto wipe_and_return; } DUK_UNREACHABLE(); break; /* never here */ } #endif /* DUK_USE_COROUTINE_SUPPORT */ case DUK_LJ_TYPE_THROW: { /* * Three possible outcomes: * * A try or finally catcher is found => resume there. * (or) * * The error propagates to the bytecode executor entry * level (and we're in the entry thread) => rethrow * with a new longjmp(), after restoring the previous * catchpoint. * * The error is not caught in the current thread, so * the thread finishes with an error. This works like * a yielded error, except that the thread is finished * and can no longer be resumed. (There is always a * resumer in this case.) * * Note: until we hit the entry level, there can only be * ECMAScript activations. */ duk_activation *act; duk_catcher *cat; duk_hthread *resumer; for (;;) { act = thr->callstack_curr; if (act == NULL) { break; } for (;;) { cat = act->cat; if (cat == NULL) { break; } if (DUK_CAT_HAS_CATCH_ENABLED(cat)) { DUK_ASSERT(DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_TCF); DUK_DDD(DUK_DDDPRINT("before catch part 1: thr=%p, act=%p, cat=%p", (void *) thr, (void *) act, (void *) act->cat)); duk__handle_catch_part1(thr, &thr->heap->lj.value1, DUK_LJ_TYPE_THROW, out_delayed_catch_setup); DUK_DD(DUK_DDPRINT("-> throw caught by a 'catch' clause, restart execution")); retval = DUK__LONGJMP_RESTART; goto wipe_and_return; } if (DUK_CAT_HAS_FINALLY_ENABLED(cat)) { DUK_ASSERT(DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_TCF); DUK_ASSERT(!DUK_CAT_HAS_CATCH_ENABLED(cat)); duk__handle_finally(thr, &thr->heap->lj.value1, DUK_LJ_TYPE_THROW); DUK_DD(DUK_DDPRINT("-> throw caught by a 'finally' clause, restart execution")); retval = DUK__LONGJMP_RESTART; goto wipe_and_return; } duk_hthread_catcher_unwind_norz(thr, act); } if (act == entry_act) { /* Not caught by anything before entry level; rethrow and let the * final catcher finish unwinding (esp. value stack). */ DUK_D(DUK_DPRINT("-> throw propagated up to entry level, rethrow and exit bytecode executor")); retval = DUK__LONGJMP_RETHROW; goto just_return; } duk_hthread_activation_unwind_norz(thr); } DUK_DD(DUK_DDPRINT("-> throw not caught by current thread, yield error to resumer and recheck longjmp")); /* Not caught by current thread, thread terminates (yield error to resumer); * note that this may cause a cascade if the resumer terminates with an uncaught * exception etc (this is OK, but needs careful testing). */ DUK_ASSERT(thr->resumer != NULL); DUK_ASSERT(thr->resumer->callstack_top >= 2); /* ECMAScript activation + Duktape.Thread.resume() activation */ DUK_ASSERT(thr->resumer->callstack_curr != NULL); DUK_ASSERT(thr->resumer->callstack_curr->parent != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->resumer->callstack_curr->parent) != NULL && DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(thr->resumer->callstack_curr->parent))); /* an ECMAScript function */ resumer = thr->resumer; /* reset longjmp */ DUK_ASSERT(thr->heap->lj.type == DUK_LJ_TYPE_THROW); /* already set */ /* lj.value1 already set */ duk_hthread_terminate(thr); /* updates thread state, minimizes its allocations */ DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_TERMINATED); thr->resumer = NULL; DUK_HTHREAD_DECREF_NORZ(thr, resumer); resumer->state = DUK_HTHREAD_STATE_RUNNING; DUK_HEAP_SWITCH_THREAD(thr->heap, resumer); thr = resumer; goto check_longjmp; } case DUK_LJ_TYPE_BREAK: /* pseudotypes, not used in actual longjmps */ case DUK_LJ_TYPE_CONTINUE: case DUK_LJ_TYPE_RETURN: case DUK_LJ_TYPE_NORMAL: default: { /* should never happen, but be robust */ DUK_D(DUK_DPRINT("caught unknown longjmp type %ld, treat as internal error", (long) thr->heap->lj.type)); goto convert_to_internal_error; } } /* end switch */ DUK_UNREACHABLE(); wipe_and_return: DUK_DD(DUK_DDPRINT("handling longjmp done, wipe-and-return, top=%ld", (long) duk_get_top(thr))); thr->heap->lj.type = DUK_LJ_TYPE_UNKNOWN; thr->heap->lj.iserror = 0; DUK_TVAL_SET_UNDEFINED_UPDREF(thr, &thr->heap->lj.value1); /* side effects */ DUK_TVAL_SET_UNDEFINED_UPDREF(thr, &thr->heap->lj.value2); /* side effects */ DUK_GC_TORTURE(thr->heap); just_return: return retval; convert_to_internal_error: /* This could also be thrown internally (set the error, goto check_longjmp), * but it's better for internal errors to bubble outwards so that we won't * infinite loop in this catchpoint. */ DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return 0;); } /* Handle a BREAK/CONTINUE opcode. Avoid using longjmp() for BREAK/CONTINUE * handling because it has a measurable performance impact in ordinary * environments and an extreme impact in Emscripten (GH-342). */ DUK_LOCAL DUK__NOINLINE_PERF void duk__handle_break_or_continue(duk_hthread *thr, duk_uint_t label_id, duk_small_uint_t lj_type) { duk_activation *act; duk_catcher *cat; DUK_ASSERT(thr != NULL); /* Find a matching label catcher or 'finally' catcher in * the same function, unwinding catchers as we go. * * A label catcher must always exist and will match unless * a 'finally' captures the break/continue first. It is the * compiler's responsibility to ensure that labels are used * correctly. */ act = thr->callstack_curr; DUK_ASSERT(act != NULL); for (;;) { cat = act->cat; if (cat == NULL) { break; } DUK_DDD(DUK_DDDPRINT("considering catcher %p: type=%ld label=%ld", (void *) cat, (long) DUK_CAT_GET_TYPE(cat), (long) DUK_CAT_GET_LABEL(cat))); /* XXX: bit mask test; FINALLY <-> TCF, single bit mask would suffice? */ if (DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_TCF && DUK_CAT_HAS_FINALLY_ENABLED(cat)) { duk_tval tv_tmp; DUK_TVAL_SET_U32(&tv_tmp, (duk_uint32_t) label_id); duk__handle_finally(thr, &tv_tmp, lj_type); DUK_DD(DUK_DDPRINT("-> break/continue caught by 'finally', restart execution")); return; } if (DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_LABEL && (duk_uint_t) DUK_CAT_GET_LABEL(cat) == label_id) { duk__handle_label(thr, lj_type); DUK_DD(DUK_DDPRINT("-> break/continue caught by a label catcher (in the same function), restart execution")); return; } duk_hthread_catcher_unwind_norz(thr, act); } /* Should never happen, but be robust. */ DUK_D(DUK_DPRINT("-> break/continue not caught by anything in the current function (should never happen), throw internal error")); DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return;); } /* Handle a RETURN opcode. Avoid using longjmp() for return handling because * it has a measurable performance impact in ordinary environments and an extreme * impact in Emscripten (GH-342). Return value is on value stack top. */ DUK_LOCAL duk_small_uint_t duk__handle_return(duk_hthread *thr, duk_activation *entry_act) { duk_tval *tv1; duk_tval *tv2; #if defined(DUK_USE_COROUTINE_SUPPORT) duk_hthread *resumer; #endif duk_activation *act; duk_catcher *cat; /* We can directly access value stack here. */ DUK_ASSERT(thr != NULL); DUK_ASSERT(entry_act != NULL); DUK_ASSERT(thr->valstack_top - 1 >= thr->valstack_bottom); tv1 = thr->valstack_top - 1; DUK_TVAL_CHKFAST_INPLACE_FAST(tv1); /* fastint downgrade check for return values */ /* * Four possible outcomes: * * 1. A 'finally' in the same function catches the 'return'. * It may continue to propagate when 'finally' is finished, * or it may be neutralized by 'finally' (both handled by * ENDFIN). * * 2. The return happens at the entry level of the bytecode * executor, so return from the executor (in C stack). * * 3. There is a calling (ECMAScript) activation in the call * stack => return to it, in the same executor instance. * * 4. There is no calling activation, and the thread is * terminated. There is always a resumer in this case, * which gets the return value similarly to a 'yield' * (except that the current thread can no longer be * resumed). */ DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->callstack_top >= 1); act = thr->callstack_curr; DUK_ASSERT(act != NULL); for (;;) { cat = act->cat; if (cat == NULL) { break; } if (DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_TCF && DUK_CAT_HAS_FINALLY_ENABLED(cat)) { DUK_ASSERT(thr->valstack_top - 1 >= thr->valstack_bottom); duk__handle_finally(thr, thr->valstack_top - 1, DUK_LJ_TYPE_RETURN); DUK_DD(DUK_DDPRINT("-> return caught by 'finally', restart execution")); return DUK__RETHAND_RESTART; } duk_hthread_catcher_unwind_norz(thr, act); } if (act == entry_act) { /* Return to the bytecode executor caller who will unwind stacks * and handle constructor post-processing. * Return value is already on the stack top: [ ... retval ]. */ DUK_DDD(DUK_DDDPRINT("-> return propagated up to entry level, exit bytecode executor")); return DUK__RETHAND_FINISHED; } if (thr->callstack_top >= 2) { /* There is a caller; it MUST be an ECMAScript caller (otherwise it would * match entry_act check). */ DUK_DDD(DUK_DDDPRINT("return to ECMAScript caller, retval_byteoff=%ld, lj_value1=%!T", (long) (thr->callstack_curr->parent->retval_byteoff), (duk_tval *) &thr->heap->lj.value1)); DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(thr->callstack_curr->parent != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr->parent))); /* must be ECMAScript */ #if defined(DUK_USE_ES6_PROXY) if (thr->callstack_curr->flags & (DUK_ACT_FLAG_CONSTRUCT | DUK_ACT_FLAG_CONSTRUCT_PROXY)) { duk_call_construct_postprocess(thr, thr->callstack_curr->flags & DUK_ACT_FLAG_CONSTRUCT_PROXY); /* side effects */ } #else if (thr->callstack_curr->flags & DUK_ACT_FLAG_CONSTRUCT) { duk_call_construct_postprocess(thr, 0); /* side effects */ } #endif tv1 = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + thr->callstack_curr->parent->retval_byteoff); DUK_ASSERT(thr->valstack_top - 1 >= thr->valstack_bottom); tv2 = thr->valstack_top - 1; DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */ /* Catch stack unwind happens inline in callstack unwind. */ duk_hthread_activation_unwind_norz(thr); duk__reconfig_valstack_ecma_return(thr); DUK_DD(DUK_DDPRINT("-> return not intercepted, restart execution in caller")); return DUK__RETHAND_RESTART; } #if defined(DUK_USE_COROUTINE_SUPPORT) DUK_DD(DUK_DDPRINT("no calling activation, thread finishes (similar to yield)")); DUK_ASSERT(thr->resumer != NULL); DUK_ASSERT(thr->resumer->callstack_top >= 2); /* ECMAScript activation + Duktape.Thread.resume() activation */ DUK_ASSERT(thr->resumer->callstack_curr != NULL); DUK_ASSERT(thr->resumer->callstack_curr->parent != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->resumer->callstack_curr) != NULL && DUK_HOBJECT_IS_NATFUNC(DUK_ACT_GET_FUNC(thr->resumer->callstack_curr)) && ((duk_hnatfunc *) DUK_ACT_GET_FUNC(thr->resumer->callstack_curr))->func == duk_bi_thread_resume); /* Duktape.Thread.resume() */ DUK_ASSERT(DUK_ACT_GET_FUNC(thr->resumer->callstack_curr->parent) != NULL && DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(thr->resumer->callstack_curr->parent))); /* an ECMAScript function */ DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING); DUK_ASSERT(thr->resumer->state == DUK_HTHREAD_STATE_RESUMED); resumer = thr->resumer; /* Share yield longjmp handler. * * This sequence of steps is a bit fragile (see GH-1845): * - We need the return value from 'thr' (resumed thread) value stack. * The termination unwinds its value stack, losing the value. * - We need a refcounted reference for 'thr', which may only exist * in the caller value stack. We can't unwind or reconfigure the * caller's value stack without potentially freeing 'thr'. * * Current approach is to capture the 'thr' return value and store * a reference to 'thr' in the caller value stack temporarily. This * keeps 'thr' reachable until final yield/return handling which * removes the references atomatically. */ DUK_ASSERT(thr->valstack_top - 1 >= thr->valstack_bottom); duk_hthread_activation_unwind_norz(resumer); /* May remove last reference to 'thr', but is NORZ. */ duk_push_tval(resumer, thr->valstack_top - 1); /* Capture return value, side effect free. */ duk_push_hthread(resumer, thr); /* Make 'thr' reachable again, before side effects. */ duk_hthread_terminate(thr); /* Updates thread state, minimizes its allocations. */ thr->resumer = NULL; DUK_HTHREAD_DECREF(thr, resumer); DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_TERMINATED); resumer->state = DUK_HTHREAD_STATE_RUNNING; DUK_HEAP_SWITCH_THREAD(thr->heap, resumer); DUK_ASSERT(resumer->valstack_top - 2 >= resumer->valstack_bottom); duk__handle_yield(thr, resumer, resumer->valstack_top - 2); thr = NULL; /* 'thr' invalidated by call */ #if 0 thr = resumer; /* not needed */ #endif DUK_DD(DUK_DDPRINT("-> return not caught, thread terminated; handle like yield, restart execution in resumer")); return DUK__RETHAND_RESTART; #else /* Without coroutine support this case should never happen. */ DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return 0;); #endif } /* * Executor interrupt handling * * The handler is called whenever the interrupt countdown reaches zero * (or below). The handler must perform whatever checks are activated, * e.g. check for cumulative step count to impose an execution step * limit or check for breakpoints or other debugger interaction. * * When the actions are done, the handler must reinit the interrupt * init and counter values. The 'init' value must indicate how many * bytecode instructions are executed before the next interrupt. The * counter must interface with the bytecode executor loop. Concretely, * the new init value is normally one higher than the new counter value. * For instance, to execute exactly one bytecode instruction the init * value is set to 1 and the counter to 0. If an error is thrown by the * interrupt handler, the counters are set to the same value (e.g. both * to 0 to cause an interrupt when the next bytecode instruction is about * to be executed after error handling). * * Maintaining the init/counter value properly is important for accurate * behavior. For instance, executor step limit needs a cumulative step * count which is simply computed as a sum of 'init' values. This must * work accurately even when single stepping. */ #if defined(DUK_USE_INTERRUPT_COUNTER) #define DUK__INT_NOACTION 0 /* no specific action, resume normal execution */ #define DUK__INT_RESTART 1 /* must "goto restart_execution", e.g. breakpoints changed */ #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_LOCAL void duk__interrupt_handle_debugger(duk_hthread *thr, duk_bool_t *out_immediate, duk_small_uint_t *out_interrupt_retval) { duk_activation *act; duk_breakpoint *bp; duk_breakpoint **bp_active; duk_uint_fast32_t line = 0; duk_bool_t process_messages; duk_bool_t processed_messages = 0; DUK_ASSERT(thr->heap->dbg_processing == 0); /* don't re-enter e.g. during Eval */ act = thr->callstack_curr; DUK_ASSERT(act != NULL); /* It might seem that replacing 'thr->heap' with just 'heap' below * might be a good idea, but it increases code size slightly * (probably due to unnecessary spilling) at least on x64. */ /* * Single opcode step check */ if (thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_ONE_OPCODE_ACTIVE) { DUK_D(DUK_DPRINT("PAUSE TRIGGERED by one opcode step")); duk_debug_set_paused(thr->heap); } /* * Breakpoint and step state checks */ if (act->flags & DUK_ACT_FLAG_BREAKPOINT_ACTIVE || (thr->heap->dbg_pause_act == thr->callstack_curr)) { line = duk_debug_curr_line(thr); if (act->prev_line != line) { /* Stepped? Step out is handled by callstack unwind. */ if ((thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_LINE_CHANGE) && (thr->heap->dbg_pause_act == thr->callstack_curr) && (line != thr->heap->dbg_pause_startline)) { DUK_D(DUK_DPRINT("PAUSE TRIGGERED by line change, at line %ld", (long) line)); duk_debug_set_paused(thr->heap); } /* Check for breakpoints only on line transition. * Breakpoint is triggered when we enter the target * line from a different line, and the previous line * was within the same function. * * This condition is tricky: the condition used to be * that transition to -or across- the breakpoint line * triggered the breakpoint. This seems intuitively * better because it handles breakpoints on lines with * no emitted opcodes; but this leads to the issue * described in: https://github.com/svaarala/duktape/issues/263. */ bp_active = thr->heap->dbg_breakpoints_active; for (;;) { bp = *bp_active++; if (bp == NULL) { break; } DUK_ASSERT(bp->filename != NULL); if (act->prev_line != bp->line && line == bp->line) { DUK_D(DUK_DPRINT("PAUSE TRIGGERED by breakpoint at %!O:%ld", (duk_heaphdr *) bp->filename, (long) bp->line)); duk_debug_set_paused(thr->heap); } } } else { ; } act->prev_line = (duk_uint32_t) line; } /* * Rate limit check for sending status update or peeking into * the debug transport. Both can be expensive operations that * we don't want to do on every opcode. * * Making sure the interval remains reasonable on a wide variety * of targets and bytecode is difficult without a timestamp, so * we use a Date-provided timestamp for the rate limit check. * But since it's also expensive to get a timestamp, a bytecode * counter is used to rate limit getting timestamps. */ process_messages = 0; if (thr->heap->dbg_state_dirty || DUK_HEAP_HAS_DEBUGGER_PAUSED(thr->heap) || thr->heap->dbg_detaching) { /* Enter message processing loop for sending Status notifys and * to finish a pending detach. */ process_messages = 1; } /* XXX: remove heap->dbg_exec_counter, use heap->inst_count_interrupt instead? */ DUK_ASSERT(thr->interrupt_init >= 0); thr->heap->dbg_exec_counter += (duk_uint_t) thr->interrupt_init; if (thr->heap->dbg_exec_counter - thr->heap->dbg_last_counter >= DUK_HEAP_DBG_RATELIMIT_OPCODES) { /* Overflow of the execution counter is fine and doesn't break * anything here. */ duk_double_t now, diff_last; thr->heap->dbg_last_counter = thr->heap->dbg_exec_counter; now = duk_time_get_monotonic_time(thr); diff_last = now - thr->heap->dbg_last_time; if (diff_last < 0.0 || diff_last >= (duk_double_t) DUK_HEAP_DBG_RATELIMIT_MILLISECS) { /* Monotonic time should not experience time jumps, * but the provider may be missing and we're actually * using ECMAScript time. So, tolerate negative values * so that a time jump works reasonably. * * Same interval is now used for status sending and * peeking. */ thr->heap->dbg_last_time = now; thr->heap->dbg_state_dirty = 1; process_messages = 1; } } /* * Process messages and send status if necessary. * * If we're paused, we'll block for new messages. If we're not * paused, we'll process anything we can peek but won't block * for more. Detach (and re-attach) handling is all localized * to duk_debug_process_messages() too. * * Debugger writes outside the message loop may cause debugger * detach1 phase to run, after which dbg_read_cb == NULL and * dbg_detaching != 0. The message loop will finish the detach * by running detach2 phase, so enter the message loop also when * detaching. */ if (process_messages) { DUK_ASSERT(thr->heap->dbg_processing == 0); processed_messages = duk_debug_process_messages(thr, 0 /*no_block*/); DUK_ASSERT(thr->heap->dbg_processing == 0); } /* Continue checked execution if there are breakpoints or we're stepping. * Also use checked execution if paused flag is active - it shouldn't be * because the debug message loop shouldn't terminate if it was. Step out * is handled by callstack unwind and doesn't need checked execution. * Note that debugger may have detached due to error or explicit request * above, so we must recheck attach status. */ if (duk_debug_is_attached(thr->heap)) { DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); if (act->flags & DUK_ACT_FLAG_BREAKPOINT_ACTIVE || (thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_ONE_OPCODE) || ((thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_LINE_CHANGE) && thr->heap->dbg_pause_act == thr->callstack_curr) || DUK_HEAP_HAS_DEBUGGER_PAUSED(thr->heap)) { *out_immediate = 1; } /* If we processed any debug messages breakpoints may have * changed; restart execution to re-check active breakpoints. */ if (processed_messages) { DUK_D(DUK_DPRINT("processed debug messages, restart execution to recheck possibly changed breakpoints")); *out_interrupt_retval = DUK__INT_RESTART; } else { if (thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_ONE_OPCODE) { /* Set 'pause after one opcode' active only when we're * actually just about to execute code. */ thr->heap->dbg_pause_flags |= DUK_PAUSE_FLAG_ONE_OPCODE_ACTIVE; } } } else { DUK_D(DUK_DPRINT("debugger became detached, resume normal execution")); } } #endif /* DUK_USE_DEBUGGER_SUPPORT */ DUK_LOCAL DUK__NOINLINE_PERF DUK_COLD duk_small_uint_t duk__executor_interrupt(duk_hthread *thr) { duk_int_t ctr; duk_activation *act; duk_hcompfunc *fun; duk_bool_t immediate = 0; duk_small_uint_t retval; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->heap != NULL); DUK_ASSERT(thr->callstack_top > 0); #if defined(DUK_USE_DEBUG) thr->heap->inst_count_interrupt += thr->interrupt_init; DUK_DD(DUK_DDPRINT("execution interrupt, counter=%ld, init=%ld, " "instruction counts: executor=%ld, interrupt=%ld", (long) thr->interrupt_counter, (long) thr->interrupt_init, (long) thr->heap->inst_count_exec, (long) thr->heap->inst_count_interrupt)); #endif retval = DUK__INT_NOACTION; ctr = DUK_HTHREAD_INTCTR_DEFAULT; /* * Avoid nested calls. Concretely this happens during debugging, e.g. * when we eval() an expression. * * Also don't interrupt if we're currently doing debug processing * (which can be initiated outside the bytecode executor) as this * may cause the debugger to be called recursively. Check required * for correct operation of throw intercept and other "exotic" halting * scenarios. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) if (DUK_HEAP_HAS_INTERRUPT_RUNNING(thr->heap) || thr->heap->dbg_processing) { #else if (DUK_HEAP_HAS_INTERRUPT_RUNNING(thr->heap)) { #endif DUK_DD(DUK_DDPRINT("nested executor interrupt, ignoring")); /* Set a high interrupt counter; the original executor * interrupt invocation will rewrite before exiting. */ thr->interrupt_init = ctr; thr->interrupt_counter = ctr - 1; return DUK__INT_NOACTION; } DUK_HEAP_SET_INTERRUPT_RUNNING(thr->heap); act = thr->callstack_curr; DUK_ASSERT(act != NULL); fun = (duk_hcompfunc *) DUK_ACT_GET_FUNC(act); DUK_ASSERT(DUK_HOBJECT_HAS_COMPFUNC((duk_hobject *) fun)); DUK_UNREF(fun); #if defined(DUK_USE_EXEC_TIMEOUT_CHECK) /* * Execution timeout check */ if (DUK_USE_EXEC_TIMEOUT_CHECK(thr->heap->heap_udata)) { /* Keep throwing an error whenever we get here. The unusual values * are set this way because no instruction is ever executed, we just * throw an error until all try/catch/finally and other catchpoints * have been exhausted. Duktape/C code gets control at each protected * call but whenever it enters back into Duktape the RangeError gets * raised. User exec timeout check must consistently indicate a timeout * until we've fully bubbled out of Duktape. */ DUK_D(DUK_DPRINT("execution timeout, throwing a RangeError")); thr->interrupt_init = 0; thr->interrupt_counter = 0; DUK_HEAP_CLEAR_INTERRUPT_RUNNING(thr->heap); DUK_ERROR_RANGE(thr, "execution timeout"); DUK_WO_NORETURN(return 0;); } #endif /* DUK_USE_EXEC_TIMEOUT_CHECK */ #if defined(DUK_USE_DEBUGGER_SUPPORT) if (!thr->heap->dbg_processing && (thr->heap->dbg_read_cb != NULL || thr->heap->dbg_detaching)) { /* Avoid recursive re-entry; enter when we're attached or * detaching (to finish off the pending detach). */ duk__interrupt_handle_debugger(thr, &immediate, &retval); DUK_ASSERT(act == thr->callstack_curr); } #endif /* DUK_USE_DEBUGGER_SUPPORT */ /* * Update the interrupt counter */ if (immediate) { /* Cause an interrupt after executing one instruction. */ ctr = 1; } /* The counter value is one less than the init value: init value should * indicate how many instructions are executed before interrupt. To * execute 1 instruction (after interrupt handler return), counter must * be 0. */ DUK_ASSERT(ctr >= 1); thr->interrupt_init = ctr; thr->interrupt_counter = ctr - 1; DUK_HEAP_CLEAR_INTERRUPT_RUNNING(thr->heap); return retval; } #endif /* DUK_USE_INTERRUPT_COUNTER */ /* * Debugger handling for executor restart * * Check for breakpoints, stepping, etc, and figure out if we should execute * in checked or normal mode. Note that we can't do this when an activation * is created, because breakpoint status (and stepping status) may change * later, so we must recheck every time we're executing an activation. * This primitive should be side effect free to avoid changes during check. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) DUK_LOCAL void duk__executor_recheck_debugger(duk_hthread *thr, duk_activation *act, duk_hcompfunc *fun) { duk_heap *heap; duk_tval *tv_tmp; duk_hstring *filename; duk_small_uint_t bp_idx; duk_breakpoint **bp_active; DUK_ASSERT(thr != NULL); DUK_ASSERT(act != NULL); DUK_ASSERT(fun != NULL); heap = thr->heap; bp_active = heap->dbg_breakpoints_active; act->flags &= ~DUK_ACT_FLAG_BREAKPOINT_ACTIVE; tv_tmp = duk_hobject_find_entry_tval_ptr_stridx(thr->heap, (duk_hobject *) fun, DUK_STRIDX_FILE_NAME); if (tv_tmp && DUK_TVAL_IS_STRING(tv_tmp)) { filename = DUK_TVAL_GET_STRING(tv_tmp); /* Figure out all active breakpoints. A breakpoint is * considered active if the current function's fileName * matches the breakpoint's fileName, AND there is no * inner function that has matching line numbers * (otherwise a breakpoint would be triggered both * inside and outside of the inner function which would * be confusing). Example: * * function foo() { * print('foo'); * function bar() { <-. breakpoints in these * print('bar'); | lines should not affect * } <-' foo() execution * bar(); * } * * We need a few things that are only available when * debugger support is enabled: (1) a line range for * each function, and (2) access to the function * template to access the inner functions (and their * line ranges). * * It's important to have a narrow match for active * breakpoints so that we don't enter checked execution * when that's not necessary. For instance, if we're * running inside a certain function and there's * breakpoint outside in (after the call site), we * don't want to slow down execution of the function. */ for (bp_idx = 0; bp_idx < heap->dbg_breakpoint_count; bp_idx++) { duk_breakpoint *bp = heap->dbg_breakpoints + bp_idx; duk_hobject **funcs, **funcs_end; duk_hcompfunc *inner_fun; duk_bool_t bp_match; if (bp->filename == filename && bp->line >= fun->start_line && bp->line <= fun->end_line) { bp_match = 1; DUK_DD(DUK_DDPRINT("breakpoint filename and line match: " "%s:%ld vs. %s (line %ld vs. %ld-%ld)", DUK_HSTRING_GET_DATA(bp->filename), (long) bp->line, DUK_HSTRING_GET_DATA(filename), (long) bp->line, (long) fun->start_line, (long) fun->end_line)); funcs = DUK_HCOMPFUNC_GET_FUNCS_BASE(thr->heap, fun); funcs_end = DUK_HCOMPFUNC_GET_FUNCS_END(thr->heap, fun); while (funcs != funcs_end) { inner_fun = (duk_hcompfunc *) *funcs; DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC((duk_hobject *) inner_fun)); if (bp->line >= inner_fun->start_line && bp->line <= inner_fun->end_line) { DUK_DD(DUK_DDPRINT("inner function masks ('captures') breakpoint")); bp_match = 0; break; } funcs++; } if (bp_match) { /* No need to check for size of bp_active list, * it's always larger than maximum number of * breakpoints. */ act->flags |= DUK_ACT_FLAG_BREAKPOINT_ACTIVE; *bp_active = heap->dbg_breakpoints + bp_idx; bp_active++; } } } } *bp_active = NULL; /* terminate */ DUK_DD(DUK_DDPRINT("ACTIVE BREAKPOINTS: %ld", (long) (bp_active - thr->heap->dbg_breakpoints_active))); /* Force pause if we were doing "step into" in another activation. */ if ((thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_FUNC_ENTRY) && thr->heap->dbg_pause_act != thr->callstack_curr) { DUK_D(DUK_DPRINT("PAUSE TRIGGERED by function entry")); duk_debug_set_paused(thr->heap); } /* Force interrupt right away if we're paused or in "checked mode". * Step out is handled by callstack unwind. */ if ((act->flags & DUK_ACT_FLAG_BREAKPOINT_ACTIVE) || DUK_HEAP_HAS_DEBUGGER_PAUSED(thr->heap) || ((thr->heap->dbg_pause_flags & DUK_PAUSE_FLAG_LINE_CHANGE) && thr->heap->dbg_pause_act == thr->callstack_curr)) { /* We'll need to interrupt early so recompute the init * counter to reflect the number of bytecode instructions * executed so that step counts for e.g. debugger rate * limiting are accurate. */ DUK_ASSERT(thr->interrupt_counter <= thr->interrupt_init); thr->interrupt_init = thr->interrupt_init - thr->interrupt_counter; thr->interrupt_counter = 0; } } #endif /* DUK_USE_DEBUGGER_SUPPORT */ /* * Opcode handlers for opcodes with a lot of code and which are relatively * rare; NOINLINE to reduce amount of code in main bytecode dispatcher. */ DUK_LOCAL DUK__NOINLINE_PERF void duk__handle_op_initset_initget(duk_hthread *thr, duk_uint_fast32_t ins) { duk_bool_t is_set = (DUK_DEC_OP(ins) == DUK_OP_INITSET); duk_uint_fast_t idx; duk_uint_t defprop_flags; /* A -> object register (acts as a source) * BC -> BC+0 contains key, BC+1 closure (value) */ /* INITSET/INITGET are only used to initialize object literal keys. * There may be a previous propery in ES2015 because duplicate property * names are allowed. */ /* This could be made more optimal by accessing internals directly. */ idx = (duk_uint_fast_t) DUK_DEC_BC(ins); duk_dup(thr, (duk_idx_t) (idx + 0)); /* key */ duk_dup(thr, (duk_idx_t) (idx + 1)); /* getter/setter */ if (is_set) { defprop_flags = DUK_DEFPROP_HAVE_SETTER | DUK_DEFPROP_FORCE | DUK_DEFPROP_SET_ENUMERABLE | DUK_DEFPROP_SET_CONFIGURABLE; } else { defprop_flags = DUK_DEFPROP_HAVE_GETTER | DUK_DEFPROP_FORCE | DUK_DEFPROP_SET_ENUMERABLE | DUK_DEFPROP_SET_CONFIGURABLE; } duk_def_prop(thr, (duk_idx_t) DUK_DEC_A(ins), defprop_flags); } DUK_LOCAL DUK__NOINLINE_PERF void duk__handle_op_trycatch(duk_hthread *thr, duk_uint_fast32_t ins, duk_instr_t *curr_pc) { duk_activation *act; duk_catcher *cat; duk_tval *tv1; duk_small_uint_fast_t a; duk_small_uint_fast_t bc; /* A -> flags * BC -> reg_catch; base register for two registers used both during * trycatch setup and when catch is triggered * * If DUK_BC_TRYCATCH_FLAG_CATCH_BINDING set: * reg_catch + 0: catch binding variable name (string). * Automatic declarative environment is established for * the duration of the 'catch' clause. * * If DUK_BC_TRYCATCH_FLAG_WITH_BINDING set: * reg_catch + 0: with 'target value', which is coerced to * an object and then used as a bindind object for an * environment record. The binding is initialized here, for * the 'try' clause. * * Note that a TRYCATCH generated for a 'with' statement has no * catch or finally parts. */ /* XXX: TRYCATCH handling should be reworked to avoid creating * an explicit scope unless it is actually needed (e.g. function * instances or eval is executed inside the catch block). This * rework is not trivial because the compiler doesn't have an * intermediate representation. When the rework is done, the * opcode format can also be made more straightforward. */ /* XXX: side effect handling is quite awkward here */ DUK_DDD(DUK_DDDPRINT("TRYCATCH: reg_catch=%ld, have_catch=%ld, " "have_finally=%ld, catch_binding=%ld, with_binding=%ld (flags=0x%02lx)", (long) DUK_DEC_BC(ins), (long) (DUK_DEC_A(ins) & DUK_BC_TRYCATCH_FLAG_HAVE_CATCH ? 1 : 0), (long) (DUK_DEC_A(ins) & DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY ? 1 : 0), (long) (DUK_DEC_A(ins) & DUK_BC_TRYCATCH_FLAG_CATCH_BINDING ? 1 : 0), (long) (DUK_DEC_A(ins) & DUK_BC_TRYCATCH_FLAG_WITH_BINDING ? 1 : 0), (unsigned long) DUK_DEC_A(ins))); a = DUK_DEC_A(ins); bc = DUK_DEC_BC(ins); /* Registers 'bc' and 'bc + 1' are written in longjmp handling * and if their previous values (which are temporaries) become * unreachable -and- have a finalizer, there'll be a function * call during error handling which is not supported now (GH-287). * Ensure that both 'bc' and 'bc + 1' have primitive values to * guarantee no finalizer calls in error handling. Scrubbing also * ensures finalizers for the previous values run here rather than * later. Error handling related values are also written to 'bc' * and 'bc + 1' but those values never become unreachable during * error handling, so there's no side effect problem even if the * error value has a finalizer. */ duk_dup(thr, (duk_idx_t) bc); /* Stabilize value. */ duk_to_undefined(thr, (duk_idx_t) bc); duk_to_undefined(thr, (duk_idx_t) (bc + 1)); /* Allocate catcher and populate it. Doesn't have to * be fully atomic, but the catcher must be in a * consistent state if side effects (such as finalizer * calls) occur. */ cat = duk_hthread_catcher_alloc(thr); DUK_ASSERT(cat != NULL); cat->flags = DUK_CAT_TYPE_TCF; cat->h_varname = NULL; cat->pc_base = (duk_instr_t *) curr_pc; /* pre-incremented, points to first jump slot */ cat->idx_base = (duk_size_t) (thr->valstack_bottom - thr->valstack) + bc; act = thr->callstack_curr; DUK_ASSERT(act != NULL); cat->parent = act->cat; act->cat = cat; if (a & DUK_BC_TRYCATCH_FLAG_HAVE_CATCH) { cat->flags |= DUK_CAT_FLAG_CATCH_ENABLED; } if (a & DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY) { cat->flags |= DUK_CAT_FLAG_FINALLY_ENABLED; } if (a & DUK_BC_TRYCATCH_FLAG_CATCH_BINDING) { DUK_DDD(DUK_DDDPRINT("catch binding flag set to catcher")); cat->flags |= DUK_CAT_FLAG_CATCH_BINDING_ENABLED; tv1 = DUK_GET_TVAL_NEGIDX(thr, -1); DUK_ASSERT(DUK_TVAL_IS_STRING(tv1)); /* borrowed reference; although 'tv1' comes from a register, * its value was loaded using LDCONST so the constant will * also exist and be reachable. */ cat->h_varname = DUK_TVAL_GET_STRING(tv1); } else if (a & DUK_BC_TRYCATCH_FLAG_WITH_BINDING) { duk_hobjenv *env; duk_hobject *target; /* Delayed env initialization for activation (if needed). */ DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); if (act->lex_env == NULL) { DUK_DDD(DUK_DDDPRINT("delayed environment initialization")); DUK_ASSERT(act->var_env == NULL); duk_js_init_activation_environment_records_delayed(thr, act); DUK_ASSERT(act == thr->callstack_curr); DUK_UNREF(act); /* 'act' is no longer accessed, scanbuild fix */ } DUK_ASSERT(act->lex_env != NULL); DUK_ASSERT(act->var_env != NULL); /* Coerce 'with' target. */ target = duk_to_hobject(thr, -1); DUK_ASSERT(target != NULL); /* Create an object environment; it is not pushed * so avoid side effects very carefully until it is * referenced. */ env = duk_hobjenv_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJENV)); DUK_ASSERT(env != NULL); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) env) == NULL); env->target = target; /* always provideThis=true */ DUK_HOBJECT_INCREF(thr, target); env->has_this = 1; DUK_HOBJENV_ASSERT_VALID(env); DUK_DDD(DUK_DDDPRINT("environment for with binding: %!iO", env)); DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) env) == NULL); DUK_ASSERT(act->lex_env != NULL); DUK_HOBJECT_SET_PROTOTYPE(thr->heap, (duk_hobject *) env, act->lex_env); act->lex_env = (duk_hobject *) env; /* Now reachable. */ DUK_HOBJECT_INCREF(thr, (duk_hobject *) env); /* Net refcount change to act->lex_env is 0: incref for env's * prototype, decref for act->lex_env overwrite. */ /* Set catcher lex_env active (affects unwind) * only when the whole setup is complete. */ cat = act->cat; /* XXX: better to relookup? not mandatory because 'cat' is stable */ cat->flags |= DUK_CAT_FLAG_LEXENV_ACTIVE; } else { ; } DUK_DDD(DUK_DDDPRINT("TRYCATCH catcher: flags=0x%08lx, pc_base=%ld, " "idx_base=%ld, h_varname=%!O", (unsigned long) cat->flags, (long) cat->pc_base, (long) cat->idx_base, (duk_heaphdr *) cat->h_varname)); duk_pop_unsafe(thr); } DUK_LOCAL DUK__NOINLINE_PERF duk_instr_t *duk__handle_op_endtry(duk_hthread *thr, duk_uint_fast32_t ins) { duk_activation *act; duk_catcher *cat; duk_tval *tv1; duk_instr_t *pc_base; DUK_UNREF(ins); DUK_ASSERT(thr->callstack_top >= 1); act = thr->callstack_curr; DUK_ASSERT(act != NULL); cat = act->cat; DUK_ASSERT(cat != NULL); DUK_ASSERT(DUK_CAT_GET_TYPE(act->cat) == DUK_CAT_TYPE_TCF); DUK_DDD(DUK_DDDPRINT("ENDTRY: clearing catch active flag (regardless of whether it was set or not)")); DUK_CAT_CLEAR_CATCH_ENABLED(cat); pc_base = cat->pc_base; if (DUK_CAT_HAS_FINALLY_ENABLED(cat)) { DUK_DDD(DUK_DDDPRINT("ENDTRY: finally part is active, jump through 2nd jump slot with 'normal continuation'")); tv1 = thr->valstack + cat->idx_base; DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top); DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv1); /* side effects */ tv1 = NULL; tv1 = thr->valstack + cat->idx_base + 1; DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top); DUK_TVAL_SET_U32_UPDREF(thr, tv1, (duk_uint32_t) DUK_LJ_TYPE_NORMAL); /* side effects */ tv1 = NULL; DUK_CAT_CLEAR_FINALLY_ENABLED(cat); } else { DUK_DDD(DUK_DDDPRINT("ENDTRY: no finally part, dismantle catcher, jump through 2nd jump slot (to end of statement)")); duk_hthread_catcher_unwind_norz(thr, act); /* lexenv may be set for 'with' binding */ /* no need to unwind callstack */ } return pc_base + 1; /* new curr_pc value */ } DUK_LOCAL DUK__NOINLINE_PERF duk_instr_t *duk__handle_op_endcatch(duk_hthread *thr, duk_uint_fast32_t ins) { duk_activation *act; duk_catcher *cat; duk_tval *tv1; duk_instr_t *pc_base; DUK_UNREF(ins); DUK_ASSERT(thr->callstack_top >= 1); act = thr->callstack_curr; DUK_ASSERT(act != NULL); cat = act->cat; DUK_ASSERT(cat != NULL); DUK_ASSERT(!DUK_CAT_HAS_CATCH_ENABLED(cat)); /* cleared before entering catch part */ if (DUK_CAT_HAS_LEXENV_ACTIVE(cat)) { duk_hobject *prev_env; /* 'with' binding has no catch clause, so can't be here unless a normal try-catch */ DUK_ASSERT(DUK_CAT_HAS_CATCH_BINDING_ENABLED(cat)); DUK_ASSERT(act->lex_env != NULL); DUK_DDD(DUK_DDDPRINT("ENDCATCH: popping catcher part lexical environment")); prev_env = act->lex_env; DUK_ASSERT(prev_env != NULL); act->lex_env = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, prev_env); DUK_CAT_CLEAR_LEXENV_ACTIVE(cat); DUK_HOBJECT_INCREF(thr, act->lex_env); DUK_HOBJECT_DECREF(thr, prev_env); /* side effects */ DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); } pc_base = cat->pc_base; if (DUK_CAT_HAS_FINALLY_ENABLED(cat)) { DUK_DDD(DUK_DDDPRINT("ENDCATCH: finally part is active, jump through 2nd jump slot with 'normal continuation'")); tv1 = thr->valstack + cat->idx_base; DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top); DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv1); /* side effects */ tv1 = NULL; tv1 = thr->valstack + cat->idx_base + 1; DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top); DUK_TVAL_SET_U32_UPDREF(thr, tv1, (duk_uint32_t) DUK_LJ_TYPE_NORMAL); /* side effects */ tv1 = NULL; DUK_CAT_CLEAR_FINALLY_ENABLED(cat); } else { DUK_DDD(DUK_DDDPRINT("ENDCATCH: no finally part, dismantle catcher, jump through 2nd jump slot (to end of statement)")); duk_hthread_catcher_unwind_norz(thr, act); /* no need to unwind callstack */ } return pc_base + 1; /* new curr_pc value */ } DUK_LOCAL DUK__NOINLINE_PERF duk_small_uint_t duk__handle_op_endfin(duk_hthread *thr, duk_uint_fast32_t ins, duk_activation *entry_act) { duk_activation *act; duk_tval *tv1; duk_uint_t reg_catch; duk_small_uint_t cont_type; duk_small_uint_t ret_result; DUK_ASSERT(thr->ptr_curr_pc == NULL); DUK_ASSERT(thr->callstack_top >= 1); act = thr->callstack_curr; DUK_ASSERT(act != NULL); reg_catch = DUK_DEC_ABC(ins); /* CATCH flag may be enabled or disabled here; it may be enabled if * the statement has a catch block but the try block does not throw * an error. */ DUK_DDD(DUK_DDDPRINT("ENDFIN: completion value=%!T, type=%!T", (duk_tval *) (thr->valstack_bottom + reg_catch + 0), (duk_tval *) (thr->valstack_bottom + reg_catch + 1))); tv1 = thr->valstack_bottom + reg_catch + 1; /* type */ DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1)); #if defined(DUK_USE_FASTINT) DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv1)); cont_type = (duk_small_uint_t) DUK_TVAL_GET_FASTINT_U32(tv1); #else cont_type = (duk_small_uint_t) DUK_TVAL_GET_NUMBER(tv1); #endif tv1--; /* value */ switch (cont_type) { case DUK_LJ_TYPE_NORMAL: { DUK_DDD(DUK_DDDPRINT("ENDFIN: finally part finishing with 'normal' (non-abrupt) completion -> " "dismantle catcher, resume execution after ENDFIN")); duk_hthread_catcher_unwind_norz(thr, act); /* no need to unwind callstack */ return 0; /* restart execution */ } case DUK_LJ_TYPE_RETURN: { DUK_DDD(DUK_DDDPRINT("ENDFIN: finally part finishing with 'return' complation -> dismantle " "catcher, handle return, lj.value1=%!T", tv1)); /* Not necessary to unwind catch stack: return handling will * do it. The finally flag of 'cat' is no longer set. The * catch flag may be set, but it's not checked by return handling. */ duk_push_tval(thr, tv1); ret_result = duk__handle_return(thr, entry_act); if (ret_result == DUK__RETHAND_RESTART) { return 0; /* restart execution */ } DUK_ASSERT(ret_result == DUK__RETHAND_FINISHED); DUK_DDD(DUK_DDDPRINT("exiting executor after ENDFIN and RETURN (pseudo) longjmp type")); return 1; /* exit executor */ } case DUK_LJ_TYPE_BREAK: case DUK_LJ_TYPE_CONTINUE: { duk_uint_t label_id; duk_small_uint_t lj_type; /* Not necessary to unwind catch stack: break/continue * handling will do it. The finally flag of 'cat' is * no longer set. The catch flag may be set, but it's * not checked by break/continue handling. */ DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1)); #if defined(DUK_USE_FASTINT) DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv1)); label_id = (duk_small_uint_t) DUK_TVAL_GET_FASTINT_U32(tv1); #else label_id = (duk_small_uint_t) DUK_TVAL_GET_NUMBER(tv1); #endif lj_type = cont_type; duk__handle_break_or_continue(thr, label_id, lj_type); return 0; /* restart execution */ } default: { DUK_DDD(DUK_DDDPRINT("ENDFIN: finally part finishing with abrupt completion, lj_type=%ld -> " "dismantle catcher, re-throw error", (long) cont_type)); duk_err_setup_ljstate1(thr, (duk_small_uint_t) cont_type, tv1); /* No debugger Throw notify check on purpose (rethrow). */ DUK_ASSERT(thr->heap->lj.jmpbuf_ptr != NULL); /* always in executor */ duk_err_longjmp(thr); DUK_UNREACHABLE(); } } DUK_UNREACHABLE(); return 0; } DUK_LOCAL DUK__NOINLINE_PERF void duk__handle_op_initenum(duk_hthread *thr, duk_uint_fast32_t ins) { duk_small_uint_t b; duk_small_uint_t c; /* * Enumeration semantics come from for-in statement, E5 Section 12.6.4. * If called with 'null' or 'undefined', this opcode returns 'null' as * the enumerator, which is special cased in NEXTENUM. This simplifies * the compiler part */ /* B -> register for writing enumerator object * C -> value to be enumerated (register) */ b = DUK_DEC_B(ins); c = DUK_DEC_C(ins); if (duk_is_null_or_undefined(thr, (duk_idx_t) c)) { duk_push_null(thr); duk_replace(thr, (duk_idx_t) b); } else { duk_dup(thr, (duk_idx_t) c); duk_to_object(thr, -1); duk_hobject_enumerator_create(thr, 0 /*enum_flags*/); /* [ ... val ] --> [ ... enum ] */ duk_replace(thr, (duk_idx_t) b); } } DUK_LOCAL DUK__NOINLINE_PERF duk_small_uint_t duk__handle_op_nextenum(duk_hthread *thr, duk_uint_fast32_t ins) { duk_small_uint_t b; duk_small_uint_t c; duk_small_uint_t pc_skip = 0; /* * NEXTENUM checks whether the enumerator still has unenumerated * keys. If so, the next key is loaded to the target register * and the next instruction is skipped. Otherwise the next instruction * will be executed, jumping out of the enumeration loop. */ /* B -> target register for next key * C -> enum register */ b = DUK_DEC_B(ins); c = DUK_DEC_C(ins); DUK_DDD(DUK_DDDPRINT("NEXTENUM: b->%!T, c->%!T", (duk_tval *) duk_get_tval(thr, (duk_idx_t) b), (duk_tval *) duk_get_tval(thr, (duk_idx_t) c))); if (duk_is_object(thr, (duk_idx_t) c)) { /* XXX: assert 'c' is an enumerator */ duk_dup(thr, (duk_idx_t) c); if (duk_hobject_enumerator_next(thr, 0 /*get_value*/)) { /* [ ... enum ] -> [ ... next_key ] */ DUK_DDD(DUK_DDDPRINT("enum active, next key is %!T, skip jump slot ", (duk_tval *) duk_get_tval(thr, -1))); pc_skip = 1; } else { /* [ ... enum ] -> [ ... ] */ DUK_DDD(DUK_DDDPRINT("enum finished, execute jump slot")); DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top)); /* valstack policy */ thr->valstack_top++; } duk_replace(thr, (duk_idx_t) b); } else { /* 'null' enumerator case -> behave as with an empty enumerator */ DUK_ASSERT(duk_is_null(thr, (duk_idx_t) c)); DUK_DDD(DUK_DDDPRINT("enum is null, execute jump slot")); } return pc_skip; } /* * Call handling helpers. */ DUK_LOCAL duk_bool_t duk__executor_handle_call(duk_hthread *thr, duk_idx_t idx, duk_idx_t nargs, duk_small_uint_t call_flags) { duk_bool_t rc; duk_set_top_unsafe(thr, (duk_idx_t) (idx + nargs + 2)); /* [ ... func this arg1 ... argN ] */ /* Attempt an Ecma-to-Ecma call setup. If the call * target is (directly or indirectly) Reflect.construct(), * the call may change into a constructor call on the fly. */ rc = (duk_bool_t) duk_handle_call_unprotected(thr, idx, call_flags); if (rc != 0) { /* Ecma-to-ecma call possible, may or may not * be a tail call. Avoid C recursion by * reusing current executor instance. */ DUK_DDD(DUK_DDDPRINT("ecma-to-ecma call setup possible, restart execution")); /* curr_pc synced by duk_handle_call_unprotected() */ DUK_ASSERT(thr->ptr_curr_pc == NULL); return rc; } else { /* Call was handled inline. */ } DUK_ASSERT(thr->ptr_curr_pc != NULL); return rc; } /* * ECMAScript bytecode executor. * * Resume execution for the current thread from its current activation. * Returns when execution would return from the entry level activation, * leaving a single return value on top of the stack. Function calls * and thread resumptions are handled internally. If an error occurs, * a longjmp() with type DUK_LJ_TYPE_THROW is called on the entry level * setjmp() jmpbuf. * * ECMAScript function calls and coroutine resumptions are handled * internally (by the outer executor function) without recursive C calls. * Other function calls are handled using duk_handle_call(), increasing * C recursion depth. * * Abrupt completions (= long control tranfers) are handled either * directly by reconfiguring relevant stacks and restarting execution, * or via a longjmp. Longjmp-free handling is preferable for performance * (especially Emscripten performance), and is used for: break, continue, * and return. * * For more detailed notes, see doc/execution.rst. * * Also see doc/code-issues.rst for discussion of setjmp(), longjmp(), * and volatile. */ /* Presence of 'fun' is config based, there's a marginal performance * difference and the best option is architecture dependent. */ #if defined(DUK_USE_EXEC_FUN_LOCAL) #define DUK__FUN() fun #else #define DUK__FUN() ((duk_hcompfunc *) DUK_ACT_GET_FUNC((thr)->callstack_curr)) #endif /* Strict flag. */ #define DUK__STRICT() ((duk_small_uint_t) DUK_HOBJECT_HAS_STRICT((duk_hobject *) DUK__FUN())) /* Reg/const access macros: these are very footprint and performance sensitive * so modify with care. Arguments are sometimes evaluated multiple times which * is not ideal. */ #define DUK__REG(x) (*(thr->valstack_bottom + (x))) #define DUK__REGP(x) (thr->valstack_bottom + (x)) #define DUK__CONST(x) (*(consts + (x))) #define DUK__CONSTP(x) (consts + (x)) /* Reg/const access macros which take the 32-bit instruction and avoid an * explicit field decoding step by using shifts and masks. These must be * kept in sync with duk_js_bytecode.h. The shift/mask values are chosen * so that 'ins' can be shifted and masked and used as a -byte- offset * instead of a duk_tval offset which needs further shifting (which is an * issue on some, but not all, CPUs). */ #define DUK__RCBIT_B DUK_BC_REGCONST_B #define DUK__RCBIT_C DUK_BC_REGCONST_C #if defined(DUK_USE_EXEC_REGCONST_OPTIMIZE) #if defined(DUK_USE_PACKED_TVAL) #define DUK__TVAL_SHIFT 3 /* sizeof(duk_tval) == 8 */ #else #define DUK__TVAL_SHIFT 4 /* sizeof(duk_tval) == 16; not always the case so also asserted for */ #endif #define DUK__SHIFT_A (DUK_BC_SHIFT_A - DUK__TVAL_SHIFT) #define DUK__SHIFT_B (DUK_BC_SHIFT_B - DUK__TVAL_SHIFT) #define DUK__SHIFT_C (DUK_BC_SHIFT_C - DUK__TVAL_SHIFT) #define DUK__SHIFT_BC (DUK_BC_SHIFT_BC - DUK__TVAL_SHIFT) #define DUK__MASK_A (DUK_BC_UNSHIFTED_MASK_A << DUK__TVAL_SHIFT) #define DUK__MASK_B (DUK_BC_UNSHIFTED_MASK_B << DUK__TVAL_SHIFT) #define DUK__MASK_C (DUK_BC_UNSHIFTED_MASK_C << DUK__TVAL_SHIFT) #define DUK__MASK_BC (DUK_BC_UNSHIFTED_MASK_BC << DUK__TVAL_SHIFT) #define DUK__BYTEOFF_A(ins) (((ins) >> DUK__SHIFT_A) & DUK__MASK_A) #define DUK__BYTEOFF_B(ins) (((ins) >> DUK__SHIFT_B) & DUK__MASK_B) #define DUK__BYTEOFF_C(ins) (((ins) >> DUK__SHIFT_C) & DUK__MASK_C) #define DUK__BYTEOFF_BC(ins) (((ins) >> DUK__SHIFT_BC) & DUK__MASK_BC) #define DUK__REGP_A(ins) ((duk_tval *) (void *) ((duk_uint8_t *) thr->valstack_bottom + DUK__BYTEOFF_A((ins)))) #define DUK__REGP_B(ins) ((duk_tval *) (void *) ((duk_uint8_t *) thr->valstack_bottom + DUK__BYTEOFF_B((ins)))) #define DUK__REGP_C(ins) ((duk_tval *) (void *) ((duk_uint8_t *) thr->valstack_bottom + DUK__BYTEOFF_C((ins)))) #define DUK__REGP_BC(ins) ((duk_tval *) (void *) ((duk_uint8_t *) thr->valstack_bottom + DUK__BYTEOFF_BC((ins)))) #define DUK__CONSTP_A(ins) ((duk_tval *) (void *) ((duk_uint8_t *) consts + DUK__BYTEOFF_A((ins)))) #define DUK__CONSTP_B(ins) ((duk_tval *) (void *) ((duk_uint8_t *) consts + DUK__BYTEOFF_B((ins)))) #define DUK__CONSTP_C(ins) ((duk_tval *) (void *) ((duk_uint8_t *) consts + DUK__BYTEOFF_C((ins)))) #define DUK__CONSTP_BC(ins) ((duk_tval *) (void *) ((duk_uint8_t *) consts + DUK__BYTEOFF_BC((ins)))) #define DUK__REGCONSTP_B(ins) ((duk_tval *) (void *) ((duk_uint8_t *) (((ins) & DUK__RCBIT_B) ? consts : thr->valstack_bottom) + DUK__BYTEOFF_B((ins)))) #define DUK__REGCONSTP_C(ins) ((duk_tval *) (void *) ((duk_uint8_t *) (((ins) & DUK__RCBIT_C) ? consts : thr->valstack_bottom) + DUK__BYTEOFF_C((ins)))) #else /* DUK_USE_EXEC_REGCONST_OPTIMIZE */ /* Safe alternatives, no assumption about duk_tval size. */ #define DUK__REGP_A(ins) DUK__REGP(DUK_DEC_A((ins))) #define DUK__REGP_B(ins) DUK__REGP(DUK_DEC_B((ins))) #define DUK__REGP_C(ins) DUK__REGP(DUK_DEC_C((ins))) #define DUK__REGP_BC(ins) DUK__REGP(DUK_DEC_BC((ins))) #define DUK__CONSTP_A(ins) DUK__CONSTP(DUK_DEC_A((ins))) #define DUK__CONSTP_B(ins) DUK__CONSTP(DUK_DEC_B((ins))) #define DUK__CONSTP_C(ins) DUK__CONSTP(DUK_DEC_C((ins))) #define DUK__CONSTP_BC(ins) DUK__CONSTP(DUK_DEC_BC((ins))) #define DUK__REGCONSTP_B(ins) ((((ins) & DUK__RCBIT_B) ? consts : thr->valstack_bottom) + DUK_DEC_B((ins))) #define DUK__REGCONSTP_C(ins) ((((ins) & DUK__RCBIT_C) ? consts : thr->valstack_bottom) + DUK_DEC_C((ins))) #endif /* DUK_USE_EXEC_REGCONST_OPTIMIZE */ #if defined(DUK_USE_VERBOSE_EXECUTOR_ERRORS) #define DUK__INTERNAL_ERROR(msg) do { \ DUK_ERROR_ERROR(thr, (msg)); \ DUK_WO_NORETURN(return;); \ } while (0) #else #define DUK__INTERNAL_ERROR(msg) do { \ goto internal_error; \ } while (0) #endif #define DUK__SYNC_CURR_PC() do { \ duk_activation *duk__act; \ duk__act = thr->callstack_curr; \ duk__act->curr_pc = curr_pc; \ } while (0) #define DUK__SYNC_AND_NULL_CURR_PC() do { \ duk_activation *duk__act; \ duk__act = thr->callstack_curr; \ duk__act->curr_pc = curr_pc; \ thr->ptr_curr_pc = NULL; \ } while (0) #if defined(DUK_USE_EXEC_PREFER_SIZE) #define DUK__LOOKUP_INDIRECT(idx) do { \ (idx) = (duk_uint_fast_t) duk_get_uint(thr, (duk_idx_t) (idx)); \ } while (0) #elif defined(DUK_USE_FASTINT) #define DUK__LOOKUP_INDIRECT(idx) do { \ duk_tval *tv_ind; \ tv_ind = DUK__REGP((idx)); \ DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind)); \ DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv_ind)); /* compiler guarantees */ \ (idx) = (duk_uint_fast_t) DUK_TVAL_GET_FASTINT_U32(tv_ind); \ } while (0) #else #define DUK__LOOKUP_INDIRECT(idx) do { \ duk_tval *tv_ind; \ tv_ind = DUK__REGP(idx); \ DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind)); \ idx = (duk_uint_fast_t) DUK_TVAL_GET_NUMBER(tv_ind); \ } while (0) #endif DUK_LOCAL void duk__handle_executor_error(duk_heap *heap, duk_activation *entry_act, duk_int_t entry_call_recursion_depth, duk_jmpbuf *entry_jmpbuf_ptr, volatile duk_bool_t *out_delayed_catch_setup) { duk_small_uint_t lj_ret; /* Longjmp callers are required to sync-and-null thr->ptr_curr_pc * before longjmp. */ DUK_ASSERT(heap->curr_thread != NULL); DUK_ASSERT(heap->curr_thread->ptr_curr_pc == NULL); /* XXX: signalling the need to shrink check (only if unwound) */ /* Must be restored here to handle e.g. yields properly. */ heap->call_recursion_depth = entry_call_recursion_depth; /* Switch to caller's setjmp() catcher so that if an error occurs * during error handling, it is always propagated outwards instead * of causing an infinite loop in our own handler. */ heap->lj.jmpbuf_ptr = (duk_jmpbuf *) entry_jmpbuf_ptr; lj_ret = duk__handle_longjmp(heap->curr_thread, entry_act, out_delayed_catch_setup); /* Error handling complete, remove side effect protections. */ #if defined(DUK_USE_ASSERTIONS) DUK_ASSERT(heap->error_not_allowed == 1); heap->error_not_allowed = 0; #endif DUK_ASSERT(heap->pf_prevent_count > 0); heap->pf_prevent_count--; DUK_DD(DUK_DDPRINT("executor error handled, pf_prevent_count updated to %ld", (long) heap->pf_prevent_count)); if (lj_ret == DUK__LONGJMP_RESTART) { /* Restart bytecode execution, possibly with a changed thread. */ DUK_REFZERO_CHECK_SLOW(heap->curr_thread); } else { /* If an error is propagated, don't run refzero checks here. * The next catcher will deal with that. Pf_prevent_count * will be re-bumped by the longjmp. */ DUK_ASSERT(lj_ret == DUK__LONGJMP_RETHROW); /* Rethrow error to calling state. */ DUK_ASSERT(heap->lj.jmpbuf_ptr == entry_jmpbuf_ptr); /* Longjmp handling has restored jmpbuf_ptr. */ /* Thread may have changed, e.g. YIELD converted to THROW. */ duk_err_longjmp(heap->curr_thread); DUK_UNREACHABLE(); } } /* Outer executor with setjmp/longjmp handling. */ DUK_INTERNAL void duk_js_execute_bytecode(duk_hthread *exec_thr) { /* Entry level info. */ duk_hthread *entry_thread; duk_activation *entry_act; duk_int_t entry_call_recursion_depth; duk_jmpbuf *entry_jmpbuf_ptr; duk_jmpbuf our_jmpbuf; duk_heap *heap; volatile duk_bool_t delayed_catch_setup = 0; DUK_ASSERT(exec_thr != NULL); DUK_ASSERT(exec_thr->heap != NULL); DUK_ASSERT(exec_thr->heap->curr_thread != NULL); DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR((duk_heaphdr *) exec_thr); DUK_ASSERT(exec_thr->callstack_top >= 1); /* at least one activation, ours */ DUK_ASSERT(exec_thr->callstack_curr != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(exec_thr->callstack_curr) != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(exec_thr->callstack_curr))); DUK_GC_TORTURE(exec_thr->heap); entry_thread = exec_thr; heap = entry_thread->heap; entry_act = entry_thread->callstack_curr; DUK_ASSERT(entry_act != NULL); entry_call_recursion_depth = entry_thread->heap->call_recursion_depth; entry_jmpbuf_ptr = entry_thread->heap->lj.jmpbuf_ptr; /* * Note: we currently assume that the setjmp() catchpoint is * not re-entrant (longjmp() cannot be called more than once * for a single setjmp()). * * See doc/code-issues.rst for notes on variable assignment * before and after setjmp(). */ for (;;) { heap->lj.jmpbuf_ptr = &our_jmpbuf; DUK_ASSERT(heap->lj.jmpbuf_ptr != NULL); #if defined(DUK_USE_CPP_EXCEPTIONS) try { #else DUK_ASSERT(heap->lj.jmpbuf_ptr == &our_jmpbuf); if (DUK_SETJMP(our_jmpbuf.jb) == 0) { #endif DUK_DDD(DUK_DDDPRINT("after setjmp, delayed catch setup: %ld\n", (long) delayed_catch_setup)); if (DUK_UNLIKELY(delayed_catch_setup != 0)) { duk_hthread *thr = entry_thread->heap->curr_thread; delayed_catch_setup = 0; duk__handle_catch_part2(thr); DUK_ASSERT(delayed_catch_setup == 0); DUK_DDD(DUK_DDDPRINT("top after delayed catch setup: %ld", (long) duk_get_top(entry_thread))); } /* Execute bytecode until returned or longjmp(). */ duk__js_execute_bytecode_inner(entry_thread, entry_act); /* Successful return: restore jmpbuf and return to caller. */ heap->lj.jmpbuf_ptr = entry_jmpbuf_ptr; return; #if defined(DUK_USE_CPP_EXCEPTIONS) } catch (duk_internal_exception &exc) { #else } else { #endif #if defined(DUK_USE_CPP_EXCEPTIONS) DUK_UNREF(exc); #endif DUK_DDD(DUK_DDDPRINT("longjmp caught by bytecode executor")); DUK_STATS_INC(exec_thr->heap, stats_exec_throw); duk__handle_executor_error(heap, entry_act, entry_call_recursion_depth, entry_jmpbuf_ptr, &delayed_catch_setup); } #if defined(DUK_USE_CPP_EXCEPTIONS) catch (duk_fatal_exception &exc) { DUK_D(DUK_DPRINT("rethrow duk_fatal_exception")); throw; } catch (std::exception &exc) { const char *what = exc.what(); if (!what) { what = "unknown"; } DUK_D(DUK_DPRINT("unexpected c++ std::exception (perhaps thrown by user code)")); DUK_STATS_INC(exec_thr->heap, stats_exec_throw); try { DUK_ASSERT(heap->curr_thread != NULL); DUK_ERROR_FMT1(heap->curr_thread, DUK_ERR_TYPE_ERROR, "caught invalid c++ std::exception '%s' (perhaps thrown by user code)", what); DUK_WO_NORETURN(return;); } catch (duk_internal_exception exc) { DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ std::exception")); DUK_UNREF(exc); duk__handle_executor_error(heap, entry_act, entry_call_recursion_depth, entry_jmpbuf_ptr, &delayed_catch_setup); } } catch (...) { DUK_D(DUK_DPRINT("unexpected c++ exception (perhaps thrown by user code)")); DUK_STATS_INC(exec_thr->heap, stats_exec_throw); try { DUK_ASSERT(heap->curr_thread != NULL); DUK_ERROR_TYPE(heap->curr_thread, "caught invalid c++ exception (perhaps thrown by user code)"); DUK_WO_NORETURN(return;); } catch (duk_internal_exception exc) { DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ exception")); DUK_UNREF(exc); duk__handle_executor_error(heap, entry_act, entry_call_recursion_depth, entry_jmpbuf_ptr, &delayed_catch_setup); } } #endif } DUK_WO_NORETURN(return;); } /* Inner executor, performance critical. */ DUK_LOCAL DUK_NOINLINE DUK_HOT void duk__js_execute_bytecode_inner(duk_hthread *entry_thread, duk_activation *entry_act) { /* Current PC, accessed by other functions through thr->ptr_to_curr_pc. * Critical for performance. It would be safest to make this volatile, * but that eliminates performance benefits; aliasing guarantees * should be enough though. */ duk_instr_t *curr_pc; /* bytecode has a stable pointer */ /* Hot variables for interpretation. Critical for performance, * but must add sparingly to minimize register shuffling. */ duk_hthread *thr; /* stable */ duk_tval *consts; /* stable */ duk_uint_fast32_t ins; /* 'funcs' is quite rarely used, so no local for it */ #if defined(DUK_USE_EXEC_FUN_LOCAL) duk_hcompfunc *fun; #else /* 'fun' is quite rarely used, so no local for it */ #endif #if defined(DUK_USE_INTERRUPT_COUNTER) duk_int_t int_ctr; #endif #if defined(DUK_USE_ASSERTIONS) duk_size_t valstack_top_base; /* valstack top, should match before interpreting each op (no leftovers) */ #endif /* Optimized reg/const access macros assume sizeof(duk_tval) to be * either 8 or 16. Heap allocation checks this even without asserts * enabled now because it can't be autodetected in duk_config.h. */ #if 1 #if defined(DUK_USE_PACKED_TVAL) DUK_ASSERT(sizeof(duk_tval) == 8); #else DUK_ASSERT(sizeof(duk_tval) == 16); #endif #endif DUK_GC_TORTURE(entry_thread->heap); /* * Restart execution by reloading thread state. * * Note that 'thr' and any thread configuration may have changed, * so all local variables are suspect and we need to reinitialize. * * The number of local variables should be kept to a minimum: if * the variables are spilled, they will need to be loaded from * memory anyway. * * Any 'goto restart_execution;' code path in opcode dispatch must * ensure 'curr_pc' is synced back to act->curr_pc before the goto * takes place. * * The interpreter must be very careful with memory pointers, as * many pointers are not guaranteed to be 'stable' and may be * reallocated and relocated on-the-fly quite easily (e.g. by a * memory allocation or a property access). * * The following are assumed to have stable pointers: * - the current thread * - the current function * - the bytecode, constant table, inner function table of the * current function (as they are a part of the function allocation) * * The following are assumed to have semi-stable pointers: * - the current activation entry: stable as long as callstack * is not changed (reallocated by growing or shrinking), or * by any garbage collection invocation (through finalizers) * - Note in particular that ANY DECREF can invalidate the * activation pointer, so for the most part a fresh lookup * is required * * The following are not assumed to have stable pointers at all: * - the value stack (registers) of the current thread * * See execution.rst for discussion. */ restart_execution: /* Lookup current thread; use the stable 'entry_thread' for this to * avoid clobber warnings. Any valid, reachable 'thr' value would be * fine for this, so using 'entry_thread' is just to silence warnings. */ thr = entry_thread->heap->curr_thread; DUK_ASSERT(thr != NULL); DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(thr->callstack_curr != NULL); DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack_curr) != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(DUK_ACT_GET_FUNC(thr->callstack_curr))); DUK_GC_TORTURE(thr->heap); thr->ptr_curr_pc = &curr_pc; /* Relookup and initialize dispatch loop variables. Debugger check. */ { duk_activation *act; #if !defined(DUK_USE_EXEC_FUN_LOCAL) duk_hcompfunc *fun; #endif /* Assume interrupt init/counter are properly initialized here. */ /* Assume that thr->valstack_bottom has been set-up before getting here. */ act = thr->callstack_curr; DUK_ASSERT(act != NULL); fun = (duk_hcompfunc *) DUK_ACT_GET_FUNC(act); DUK_ASSERT(fun != NULL); DUK_ASSERT(thr->valstack_top - thr->valstack_bottom == fun->nregs); consts = DUK_HCOMPFUNC_GET_CONSTS_BASE(thr->heap, fun); DUK_ASSERT(consts != NULL); #if defined(DUK_USE_DEBUGGER_SUPPORT) if (DUK_UNLIKELY(duk_debug_is_attached(thr->heap) && !thr->heap->dbg_processing)) { duk__executor_recheck_debugger(thr, act, fun); DUK_ASSERT(act == thr->callstack_curr); DUK_ASSERT(act != NULL); } #endif /* DUK_USE_DEBUGGER_SUPPORT */ #if defined(DUK_USE_ASSERTIONS) valstack_top_base = (duk_size_t) (thr->valstack_top - thr->valstack); #endif /* Set up curr_pc for opcode dispatch. */ curr_pc = act->curr_pc; } DUK_DD(DUK_DDPRINT("restarting execution, thr %p, act idx %ld, fun %p," "consts %p, funcs %p, lev %ld, regbot %ld, regtop %ld, " "preventcount=%ld", (void *) thr, (long) (thr->callstack_top - 1), (void *) DUK__FUN(), (void *) DUK_HCOMPFUNC_GET_CONSTS_BASE(thr->heap, DUK__FUN()), (void *) DUK_HCOMPFUNC_GET_FUNCS_BASE(thr->heap, DUK__FUN()), (long) (thr->callstack_top - 1), (long) (thr->valstack_bottom - thr->valstack), (long) (thr->valstack_top - thr->valstack), (long) thr->callstack_preventcount)); /* Dispatch loop. */ for (;;) { duk_uint8_t op; DUK_ASSERT(thr->callstack_top >= 1); DUK_ASSERT(thr->valstack_top - thr->valstack_bottom == DUK__FUN()->nregs); DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack) == valstack_top_base); /* Executor interrupt counter check, used to implement breakpoints, * debugging interface, execution timeouts, etc. The counter is heap * specific but is maintained in the current thread to make the check * as fast as possible. The counter is copied back to the heap struct * whenever a thread switch occurs by the DUK_HEAP_SWITCH_THREAD() macro. */ #if defined(DUK_USE_INTERRUPT_COUNTER) int_ctr = thr->interrupt_counter; if (DUK_LIKELY(int_ctr > 0)) { thr->interrupt_counter = int_ctr - 1; } else { /* Trigger at zero or below */ duk_small_uint_t exec_int_ret; DUK_STATS_INC(thr->heap, stats_exec_interrupt); /* Write curr_pc back for the debugger. */ { duk_activation *act; DUK_ASSERT(thr->callstack_top > 0); act = thr->callstack_curr; DUK_ASSERT(act != NULL); act->curr_pc = (duk_instr_t *) curr_pc; } /* Forced restart caused by a function return; must recheck * debugger breakpoints before checking line transitions, * see GH-303. Restart and then handle interrupt_counter * zero again. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) if (thr->heap->dbg_force_restart) { DUK_DD(DUK_DDPRINT("dbg_force_restart flag forced restart execution")); /* GH-303 */ thr->heap->dbg_force_restart = 0; goto restart_execution; } #endif exec_int_ret = duk__executor_interrupt(thr); if (exec_int_ret == DUK__INT_RESTART) { /* curr_pc synced back above */ goto restart_execution; } } #endif /* DUK_USE_INTERRUPT_COUNTER */ #if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG) /* For cross-checking during development: ensure dispatch count * matches cumulative interrupt counter init value sums. */ thr->heap->inst_count_exec++; #endif #if defined(DUK_USE_ASSERTIONS) || defined(DUK_USE_DEBUG) { duk_activation *act; act = thr->callstack_curr; DUK_ASSERT(curr_pc >= DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, DUK__FUN())); DUK_ASSERT(curr_pc < DUK_HCOMPFUNC_GET_CODE_END(thr->heap, DUK__FUN())); DUK_UNREF(act); /* if debugging disabled */ DUK_DDD(DUK_DDDPRINT("executing bytecode: pc=%ld, ins=0x%08lx, op=%ld, valstack_top=%ld/%ld, nregs=%ld --> %!I", (long) (curr_pc - DUK_HCOMPFUNC_GET_CODE_BASE(thr->heap, DUK__FUN())), (unsigned long) *curr_pc, (long) DUK_DEC_OP(*curr_pc), (long) (thr->valstack_top - thr->valstack), (long) (thr->valstack_end - thr->valstack), (long) (DUK__FUN() ? DUK__FUN()->nregs : -1), (duk_instr_t) *curr_pc)); } #endif #if defined(DUK_USE_ASSERTIONS) /* Quite heavy assert: check valstack policy. Improper * shuffle instructions can write beyond valstack_top/end * so this check catches them in the act. */ { duk_tval *tv; tv = thr->valstack_top; while (tv != thr->valstack_end) { DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv)); tv++; } } #endif ins = *curr_pc++; DUK_STATS_INC(thr->heap, stats_exec_opcodes); /* Typing: use duk_small_(u)int_fast_t when decoding small * opcode fields (op, A, B, C, BC) which fit into 16 bits * and duk_(u)int_fast_t when decoding larger fields (e.g. * ABC). Use unsigned variant by default, signed when the * value is used in signed arithmetic. Using variable names * such as 'a', 'b', 'c', 'bc', etc makes it easier to spot * typing mismatches. */ /* Switch based on opcode. Cast to 8-bit unsigned value and * use a fully populated case clauses so that the compiler * will (at least usually) omit a bounds check. */ op = (duk_uint8_t) DUK_DEC_OP(ins); switch (op) { /* Some useful macros. These access inner executor variables * directly so they only apply within the executor. */ #if defined(DUK_USE_EXEC_PREFER_SIZE) #define DUK__REPLACE_TOP_A_BREAK() { goto replace_top_a; } #define DUK__REPLACE_TOP_BC_BREAK() { goto replace_top_bc; } #define DUK__REPLACE_BOOL_A_BREAK(bval) { \ duk_bool_t duk__bval; \ duk__bval = (bval); \ DUK_ASSERT(duk__bval == 0 || duk__bval == 1); \ duk_push_boolean(thr, duk__bval); \ DUK__REPLACE_TOP_A_BREAK(); \ } #else #define DUK__REPLACE_TOP_A_BREAK() { DUK__REPLACE_TO_TVPTR(thr, DUK__REGP_A(ins)); break; } #define DUK__REPLACE_TOP_BC_BREAK() { DUK__REPLACE_TO_TVPTR(thr, DUK__REGP_BC(ins)); break; } #define DUK__REPLACE_BOOL_A_BREAK(bval) { \ duk_bool_t duk__bval; \ duk_tval *duk__tvdst; \ duk__bval = (bval); \ DUK_ASSERT(duk__bval == 0 || duk__bval == 1); \ duk__tvdst = DUK__REGP_A(ins); \ DUK_TVAL_SET_BOOLEAN_UPDREF(thr, duk__tvdst, duk__bval); \ break; \ } #endif /* XXX: 12 + 12 bit variant might make sense too, for both reg and * const loads. */ /* For LDREG, STREG, LDCONST footprint optimized variants would just * duk_dup() + duk_replace(), but because they're used quite a lot * they're currently intentionally not size optimized. */ case DUK_OP_LDREG: { duk_tval *tv1, *tv2; tv1 = DUK__REGP_A(ins); tv2 = DUK__REGP_BC(ins); DUK_TVAL_SET_TVAL_UPDREF_FAST(thr, tv1, tv2); /* side effects */ break; } case DUK_OP_STREG: { duk_tval *tv1, *tv2; tv1 = DUK__REGP_A(ins); tv2 = DUK__REGP_BC(ins); DUK_TVAL_SET_TVAL_UPDREF_FAST(thr, tv2, tv1); /* side effects */ break; } case DUK_OP_LDCONST: { duk_tval *tv1, *tv2; tv1 = DUK__REGP_A(ins); tv2 = DUK__CONSTP_BC(ins); DUK_TVAL_SET_TVAL_UPDREF_FAST(thr, tv1, tv2); /* side effects */ break; } /* LDINT and LDINTX are intended to load an arbitrary signed * 32-bit value. Only an LDINT+LDINTX sequence is supported. * This also guarantees all values remain fastints. */ #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_LDINT: { duk_int32_t val; val = (duk_int32_t) DUK_DEC_BC(ins) - (duk_int32_t) DUK_BC_LDINT_BIAS; duk_push_int(thr, val); DUK__REPLACE_TOP_A_BREAK(); } case DUK_OP_LDINTX: { duk_int32_t val; val = (duk_int32_t) duk_get_int(thr, DUK_DEC_A(ins)); val = (val << DUK_BC_LDINTX_SHIFT) + (duk_int32_t) DUK_DEC_BC(ins); /* no bias */ duk_push_int(thr, val); DUK__REPLACE_TOP_A_BREAK(); } #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_LDINT: { duk_tval *tv1; duk_int32_t val; val = (duk_int32_t) DUK_DEC_BC(ins) - (duk_int32_t) DUK_BC_LDINT_BIAS; tv1 = DUK__REGP_A(ins); DUK_TVAL_SET_I32_UPDREF(thr, tv1, val); /* side effects */ break; } case DUK_OP_LDINTX: { duk_tval *tv1; duk_int32_t val; tv1 = DUK__REGP_A(ins); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1)); #if defined(DUK_USE_FASTINT) DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv1)); val = DUK_TVAL_GET_FASTINT_I32(tv1); #else /* XXX: fast double-to-int conversion, we know number is integer in [-0x80000000,0xffffffff]. */ val = (duk_int32_t) DUK_TVAL_GET_NUMBER(tv1); #endif val = (duk_int32_t) ((duk_uint32_t) val << DUK_BC_LDINTX_SHIFT) + (duk_int32_t) DUK_DEC_BC(ins); /* no bias */ DUK_TVAL_SET_I32_UPDREF(thr, tv1, val); /* side effects */ break; } #endif /* DUK_USE_EXEC_PREFER_SIZE */ #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_LDTHIS: { duk_push_this(thr); DUK__REPLACE_TOP_BC_BREAK(); } case DUK_OP_LDUNDEF: { duk_to_undefined(thr, (duk_idx_t) DUK_DEC_BC(ins)); break; } case DUK_OP_LDNULL: { duk_to_null(thr, (duk_idx_t) DUK_DEC_BC(ins)); break; } case DUK_OP_LDTRUE: { duk_push_true(thr); DUK__REPLACE_TOP_BC_BREAK(); } case DUK_OP_LDFALSE: { duk_push_false(thr); DUK__REPLACE_TOP_BC_BREAK(); } #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_LDTHIS: { /* Note: 'this' may be bound to any value, not just an object */ duk_tval *tv1, *tv2; tv1 = DUK__REGP_BC(ins); tv2 = thr->valstack_bottom - 1; /* 'this binding' is just under bottom */ DUK_ASSERT(tv2 >= thr->valstack); DUK_TVAL_SET_TVAL_UPDREF_FAST(thr, tv1, tv2); /* side effects */ break; } case DUK_OP_LDUNDEF: { duk_tval *tv1; tv1 = DUK__REGP_BC(ins); DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv1); /* side effects */ break; } case DUK_OP_LDNULL: { duk_tval *tv1; tv1 = DUK__REGP_BC(ins); DUK_TVAL_SET_NULL_UPDREF(thr, tv1); /* side effects */ break; } case DUK_OP_LDTRUE: { duk_tval *tv1; tv1 = DUK__REGP_BC(ins); DUK_TVAL_SET_BOOLEAN_UPDREF(thr, tv1, 1); /* side effects */ break; } case DUK_OP_LDFALSE: { duk_tval *tv1; tv1 = DUK__REGP_BC(ins); DUK_TVAL_SET_BOOLEAN_UPDREF(thr, tv1, 0); /* side effects */ break; } #endif /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_BNOT: { duk__vm_bitwise_not(thr, DUK_DEC_BC(ins), DUK_DEC_A(ins)); break; } case DUK_OP_LNOT: { duk__vm_logical_not(thr, DUK_DEC_BC(ins), DUK_DEC_A(ins)); break; } #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_UNM: case DUK_OP_UNP: { duk__vm_arith_unary_op(thr, DUK_DEC_BC(ins), DUK_DEC_A(ins), op); break; } #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_UNM: { duk__vm_arith_unary_op(thr, DUK_DEC_BC(ins), DUK_DEC_A(ins), DUK_OP_UNM); break; } case DUK_OP_UNP: { duk__vm_arith_unary_op(thr, DUK_DEC_BC(ins), DUK_DEC_A(ins), DUK_OP_UNP); break; } #endif /* DUK_USE_EXEC_PREFER_SIZE */ #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_TYPEOF: { duk_small_uint_t stridx; stridx = duk_js_typeof_stridx(DUK__REGP_BC(ins)); DUK_ASSERT_STRIDX_VALID(stridx); duk_push_hstring_stridx(thr, stridx); DUK__REPLACE_TOP_A_BREAK(); } #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_TYPEOF: { duk_tval *tv; duk_small_uint_t stridx; duk_hstring *h_str; tv = DUK__REGP_BC(ins); stridx = duk_js_typeof_stridx(tv); DUK_ASSERT_STRIDX_VALID(stridx); h_str = DUK_HTHREAD_GET_STRING(thr, stridx); tv = DUK__REGP_A(ins); DUK_TVAL_SET_STRING_UPDREF(thr, tv, h_str); break; } #endif /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_TYPEOFID: { duk_small_uint_t stridx; #if !defined(DUK_USE_EXEC_PREFER_SIZE) duk_hstring *h_str; #endif duk_activation *act; duk_hstring *name; duk_tval *tv; /* A -> target register * BC -> constant index of identifier name */ tv = DUK__CONSTP_BC(ins); DUK_ASSERT(DUK_TVAL_IS_STRING(tv)); name = DUK_TVAL_GET_STRING(tv); tv = NULL; /* lookup has side effects */ act = thr->callstack_curr; if (duk_js_getvar_activation(thr, act, name, 0 /*throw*/)) { /* -> [... val this] */ tv = DUK_GET_TVAL_NEGIDX(thr, -2); stridx = duk_js_typeof_stridx(tv); tv = NULL; /* no longer needed */ duk_pop_2_unsafe(thr); } else { /* unresolvable, no stack changes */ stridx = DUK_STRIDX_LC_UNDEFINED; } DUK_ASSERT_STRIDX_VALID(stridx); #if defined(DUK_USE_EXEC_PREFER_SIZE) duk_push_hstring_stridx(thr, stridx); DUK__REPLACE_TOP_A_BREAK(); #else /* DUK_USE_EXEC_PREFER_SIZE */ h_str = DUK_HTHREAD_GET_STRING(thr, stridx); tv = DUK__REGP_A(ins); DUK_TVAL_SET_STRING_UPDREF(thr, tv, h_str); break; #endif /* DUK_USE_EXEC_PREFER_SIZE */ } /* Equality: E5 Sections 11.9.1, 11.9.3 */ #define DUK__EQ_BODY(barg,carg) { \ duk_bool_t tmp; \ tmp = duk_js_equals(thr, (barg), (carg)); \ DUK_ASSERT(tmp == 0 || tmp == 1); \ DUK__REPLACE_BOOL_A_BREAK(tmp); \ } #define DUK__NEQ_BODY(barg,carg) { \ duk_bool_t tmp; \ tmp = duk_js_equals(thr, (barg), (carg)); \ DUK_ASSERT(tmp == 0 || tmp == 1); \ tmp ^= 1; \ DUK__REPLACE_BOOL_A_BREAK(tmp); \ } #define DUK__SEQ_BODY(barg,carg) { \ duk_bool_t tmp; \ tmp = duk_js_strict_equals((barg), (carg)); \ DUK_ASSERT(tmp == 0 || tmp == 1); \ DUK__REPLACE_BOOL_A_BREAK(tmp); \ } #define DUK__SNEQ_BODY(barg,carg) { \ duk_bool_t tmp; \ tmp = duk_js_strict_equals((barg), (carg)); \ DUK_ASSERT(tmp == 0 || tmp == 1); \ tmp ^= 1; \ DUK__REPLACE_BOOL_A_BREAK(tmp); \ } #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_EQ_RR: case DUK_OP_EQ_CR: case DUK_OP_EQ_RC: case DUK_OP_EQ_CC: DUK__EQ_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); case DUK_OP_NEQ_RR: case DUK_OP_NEQ_CR: case DUK_OP_NEQ_RC: case DUK_OP_NEQ_CC: DUK__NEQ_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); case DUK_OP_SEQ_RR: case DUK_OP_SEQ_CR: case DUK_OP_SEQ_RC: case DUK_OP_SEQ_CC: DUK__SEQ_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); case DUK_OP_SNEQ_RR: case DUK_OP_SNEQ_CR: case DUK_OP_SNEQ_RC: case DUK_OP_SNEQ_CC: DUK__SNEQ_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_EQ_RR: DUK__EQ_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_EQ_CR: DUK__EQ_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_EQ_RC: DUK__EQ_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_EQ_CC: DUK__EQ_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_NEQ_RR: DUK__NEQ_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_NEQ_CR: DUK__NEQ_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_NEQ_RC: DUK__NEQ_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_NEQ_CC: DUK__NEQ_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_SEQ_RR: DUK__SEQ_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_SEQ_CR: DUK__SEQ_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_SEQ_RC: DUK__SEQ_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_SEQ_CC: DUK__SEQ_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_SNEQ_RR: DUK__SNEQ_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_SNEQ_CR: DUK__SNEQ_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_SNEQ_RC: DUK__SNEQ_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_SNEQ_CC: DUK__SNEQ_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); #endif /* DUK_USE_EXEC_PREFER_SIZE */ #define DUK__COMPARE_BODY(arg1,arg2,flags) { \ duk_bool_t tmp; \ tmp = duk_js_compare_helper(thr, (arg1), (arg2), (flags)); \ DUK_ASSERT(tmp == 0 || tmp == 1); \ DUK__REPLACE_BOOL_A_BREAK(tmp); \ } #define DUK__GT_BODY(barg,carg) DUK__COMPARE_BODY((carg), (barg), 0) #define DUK__GE_BODY(barg,carg) DUK__COMPARE_BODY((barg), (carg), DUK_COMPARE_FLAG_EVAL_LEFT_FIRST | DUK_COMPARE_FLAG_NEGATE) #define DUK__LT_BODY(barg,carg) DUK__COMPARE_BODY((barg), (carg), DUK_COMPARE_FLAG_EVAL_LEFT_FIRST) #define DUK__LE_BODY(barg,carg) DUK__COMPARE_BODY((carg), (barg), DUK_COMPARE_FLAG_NEGATE) #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_GT_RR: case DUK_OP_GT_CR: case DUK_OP_GT_RC: case DUK_OP_GT_CC: DUK__GT_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); case DUK_OP_GE_RR: case DUK_OP_GE_CR: case DUK_OP_GE_RC: case DUK_OP_GE_CC: DUK__GE_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); case DUK_OP_LT_RR: case DUK_OP_LT_CR: case DUK_OP_LT_RC: case DUK_OP_LT_CC: DUK__LT_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); case DUK_OP_LE_RR: case DUK_OP_LE_CR: case DUK_OP_LE_RC: case DUK_OP_LE_CC: DUK__LE_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_GT_RR: DUK__GT_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_GT_CR: DUK__GT_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_GT_RC: DUK__GT_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_GT_CC: DUK__GT_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_GE_RR: DUK__GE_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_GE_CR: DUK__GE_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_GE_RC: DUK__GE_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_GE_CC: DUK__GE_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_LT_RR: DUK__LT_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_LT_CR: DUK__LT_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_LT_RC: DUK__LT_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_LT_CC: DUK__LT_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_LE_RR: DUK__LE_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_LE_CR: DUK__LE_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_LE_RC: DUK__LE_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_LE_CC: DUK__LE_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); #endif /* DUK_USE_EXEC_PREFER_SIZE */ /* No size optimized variant at present for IF. */ case DUK_OP_IFTRUE_R: { if (duk_js_toboolean(DUK__REGP_BC(ins)) != 0) { curr_pc++; } break; } case DUK_OP_IFTRUE_C: { if (duk_js_toboolean(DUK__CONSTP_BC(ins)) != 0) { curr_pc++; } break; } case DUK_OP_IFFALSE_R: { if (duk_js_toboolean(DUK__REGP_BC(ins)) == 0) { curr_pc++; } break; } case DUK_OP_IFFALSE_C: { if (duk_js_toboolean(DUK__CONSTP_BC(ins)) == 0) { curr_pc++; } break; } #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_ADD_RR: case DUK_OP_ADD_CR: case DUK_OP_ADD_RC: case DUK_OP_ADD_CC: { /* XXX: could leave value on stack top and goto replace_top_a; */ duk__vm_arith_add(thr, DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins), DUK_DEC_A(ins)); break; } #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_ADD_RR: { duk__vm_arith_add(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins)); break; } case DUK_OP_ADD_CR: { duk__vm_arith_add(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins)); break; } case DUK_OP_ADD_RC: { duk__vm_arith_add(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins)); break; } case DUK_OP_ADD_CC: { duk__vm_arith_add(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins)); break; } #endif /* DUK_USE_EXEC_PREFER_SIZE */ #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_SUB_RR: case DUK_OP_SUB_CR: case DUK_OP_SUB_RC: case DUK_OP_SUB_CC: case DUK_OP_MUL_RR: case DUK_OP_MUL_CR: case DUK_OP_MUL_RC: case DUK_OP_MUL_CC: case DUK_OP_DIV_RR: case DUK_OP_DIV_CR: case DUK_OP_DIV_RC: case DUK_OP_DIV_CC: case DUK_OP_MOD_RR: case DUK_OP_MOD_CR: case DUK_OP_MOD_RC: case DUK_OP_MOD_CC: #if defined(DUK_USE_ES7_EXP_OPERATOR) case DUK_OP_EXP_RR: case DUK_OP_EXP_CR: case DUK_OP_EXP_RC: case DUK_OP_EXP_CC: #endif /* DUK_USE_ES7_EXP_OPERATOR */ { /* XXX: could leave value on stack top and goto replace_top_a; */ duk__vm_arith_binary_op(thr, DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins), DUK_DEC_A(ins), op); break; } #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_SUB_RR: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_SUB); break; } case DUK_OP_SUB_CR: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_SUB); break; } case DUK_OP_SUB_RC: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_SUB); break; } case DUK_OP_SUB_CC: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_SUB); break; } case DUK_OP_MUL_RR: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_MUL); break; } case DUK_OP_MUL_CR: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_MUL); break; } case DUK_OP_MUL_RC: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_MUL); break; } case DUK_OP_MUL_CC: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_MUL); break; } case DUK_OP_DIV_RR: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_DIV); break; } case DUK_OP_DIV_CR: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_DIV); break; } case DUK_OP_DIV_RC: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_DIV); break; } case DUK_OP_DIV_CC: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_DIV); break; } case DUK_OP_MOD_RR: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_MOD); break; } case DUK_OP_MOD_CR: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_MOD); break; } case DUK_OP_MOD_RC: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_MOD); break; } case DUK_OP_MOD_CC: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_MOD); break; } #if defined(DUK_USE_ES7_EXP_OPERATOR) case DUK_OP_EXP_RR: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_EXP); break; } case DUK_OP_EXP_CR: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_EXP); break; } case DUK_OP_EXP_RC: { duk__vm_arith_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_EXP); break; } case DUK_OP_EXP_CC: { duk__vm_arith_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_EXP); break; } #endif /* DUK_USE_ES7_EXP_OPERATOR */ #endif /* DUK_USE_EXEC_PREFER_SIZE */ #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_BAND_RR: case DUK_OP_BAND_CR: case DUK_OP_BAND_RC: case DUK_OP_BAND_CC: case DUK_OP_BOR_RR: case DUK_OP_BOR_CR: case DUK_OP_BOR_RC: case DUK_OP_BOR_CC: case DUK_OP_BXOR_RR: case DUK_OP_BXOR_CR: case DUK_OP_BXOR_RC: case DUK_OP_BXOR_CC: case DUK_OP_BASL_RR: case DUK_OP_BASL_CR: case DUK_OP_BASL_RC: case DUK_OP_BASL_CC: case DUK_OP_BLSR_RR: case DUK_OP_BLSR_CR: case DUK_OP_BLSR_RC: case DUK_OP_BLSR_CC: case DUK_OP_BASR_RR: case DUK_OP_BASR_CR: case DUK_OP_BASR_RC: case DUK_OP_BASR_CC: { /* XXX: could leave value on stack top and goto replace_top_a; */ duk__vm_bitwise_binary_op(thr, DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins), DUK_DEC_A(ins), op); break; } #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_BAND_RR: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BAND); break; } case DUK_OP_BAND_CR: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BAND); break; } case DUK_OP_BAND_RC: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BAND); break; } case DUK_OP_BAND_CC: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BAND); break; } case DUK_OP_BOR_RR: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BOR); break; } case DUK_OP_BOR_CR: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BOR); break; } case DUK_OP_BOR_RC: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BOR); break; } case DUK_OP_BOR_CC: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BOR); break; } case DUK_OP_BXOR_RR: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BXOR); break; } case DUK_OP_BXOR_CR: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BXOR); break; } case DUK_OP_BXOR_RC: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BXOR); break; } case DUK_OP_BXOR_CC: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BXOR); break; } case DUK_OP_BASL_RR: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BASL); break; } case DUK_OP_BASL_CR: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BASL); break; } case DUK_OP_BASL_RC: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BASL); break; } case DUK_OP_BASL_CC: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BASL); break; } case DUK_OP_BLSR_RR: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BLSR); break; } case DUK_OP_BLSR_CR: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BLSR); break; } case DUK_OP_BLSR_RC: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BLSR); break; } case DUK_OP_BLSR_CC: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BLSR); break; } case DUK_OP_BASR_RR: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BASR); break; } case DUK_OP_BASR_CR: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__REGP_C(ins), DUK_DEC_A(ins), DUK_OP_BASR); break; } case DUK_OP_BASR_RC: { duk__vm_bitwise_binary_op(thr, DUK__REGP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BASR); break; } case DUK_OP_BASR_CC: { duk__vm_bitwise_binary_op(thr, DUK__CONSTP_B(ins), DUK__CONSTP_C(ins), DUK_DEC_A(ins), DUK_OP_BASR); break; } #endif /* DUK_USE_EXEC_PREFER_SIZE */ /* For INSTOF and IN, B is always a register. */ #define DUK__INSTOF_BODY(barg,carg) { \ duk_bool_t tmp; \ tmp = duk_js_instanceof(thr, (barg), (carg)); \ DUK_ASSERT(tmp == 0 || tmp == 1); \ DUK__REPLACE_BOOL_A_BREAK(tmp); \ } #define DUK__IN_BODY(barg,carg) { \ duk_bool_t tmp; \ tmp = duk_js_in(thr, (barg), (carg)); \ DUK_ASSERT(tmp == 0 || tmp == 1); \ DUK__REPLACE_BOOL_A_BREAK(tmp); \ } #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_INSTOF_RR: case DUK_OP_INSTOF_CR: case DUK_OP_INSTOF_RC: case DUK_OP_INSTOF_CC: DUK__INSTOF_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); case DUK_OP_IN_RR: case DUK_OP_IN_CR: case DUK_OP_IN_RC: case DUK_OP_IN_CC: DUK__IN_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_INSTOF_RR: DUK__INSTOF_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_INSTOF_CR: DUK__INSTOF_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_INSTOF_RC: DUK__INSTOF_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_INSTOF_CC: DUK__INSTOF_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_IN_RR: DUK__IN_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_IN_CR: DUK__IN_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_IN_RC: DUK__IN_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_IN_CC: DUK__IN_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); #endif /* DUK_USE_EXEC_PREFER_SIZE */ /* Pre/post inc/dec for register variables, important for loops. */ #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_PREINCR: case DUK_OP_PREDECR: case DUK_OP_POSTINCR: case DUK_OP_POSTDECR: { duk__prepost_incdec_reg_helper(thr, DUK__REGP_A(ins), DUK__REGP_BC(ins), op); break; } case DUK_OP_PREINCV: case DUK_OP_PREDECV: case DUK_OP_POSTINCV: case DUK_OP_POSTDECV: { duk__prepost_incdec_var_helper(thr, DUK_DEC_A(ins), DUK__CONSTP_BC(ins), op, DUK__STRICT()); break; } #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_PREINCR: { duk__prepost_incdec_reg_helper(thr, DUK__REGP_A(ins), DUK__REGP_BC(ins), DUK_OP_PREINCR); break; } case DUK_OP_PREDECR: { duk__prepost_incdec_reg_helper(thr, DUK__REGP_A(ins), DUK__REGP_BC(ins), DUK_OP_PREDECR); break; } case DUK_OP_POSTINCR: { duk__prepost_incdec_reg_helper(thr, DUK__REGP_A(ins), DUK__REGP_BC(ins), DUK_OP_POSTINCR); break; } case DUK_OP_POSTDECR: { duk__prepost_incdec_reg_helper(thr, DUK__REGP_A(ins), DUK__REGP_BC(ins), DUK_OP_POSTDECR); break; } case DUK_OP_PREINCV: { duk__prepost_incdec_var_helper(thr, DUK_DEC_A(ins), DUK__CONSTP_BC(ins), DUK_OP_PREINCV, DUK__STRICT()); break; } case DUK_OP_PREDECV: { duk__prepost_incdec_var_helper(thr, DUK_DEC_A(ins), DUK__CONSTP_BC(ins), DUK_OP_PREDECV, DUK__STRICT()); break; } case DUK_OP_POSTINCV: { duk__prepost_incdec_var_helper(thr, DUK_DEC_A(ins), DUK__CONSTP_BC(ins), DUK_OP_POSTINCV, DUK__STRICT()); break; } case DUK_OP_POSTDECV: { duk__prepost_incdec_var_helper(thr, DUK_DEC_A(ins), DUK__CONSTP_BC(ins), DUK_OP_POSTDECV, DUK__STRICT()); break; } #endif /* DUK_USE_EXEC_PREFER_SIZE */ /* XXX: Move to separate helper, optimize for perf/size separately. */ /* Preinc/predec for object properties. */ case DUK_OP_PREINCP_RR: case DUK_OP_PREINCP_CR: case DUK_OP_PREINCP_RC: case DUK_OP_PREINCP_CC: case DUK_OP_PREDECP_RR: case DUK_OP_PREDECP_CR: case DUK_OP_PREDECP_RC: case DUK_OP_PREDECP_CC: case DUK_OP_POSTINCP_RR: case DUK_OP_POSTINCP_CR: case DUK_OP_POSTINCP_RC: case DUK_OP_POSTINCP_CC: case DUK_OP_POSTDECP_RR: case DUK_OP_POSTDECP_CR: case DUK_OP_POSTDECP_RC: case DUK_OP_POSTDECP_CC: { duk_tval *tv_obj; duk_tval *tv_key; duk_tval *tv_val; duk_bool_t rc; duk_double_t x, y, z; #if !defined(DUK_USE_EXEC_PREFER_SIZE) duk_tval *tv_dst; #endif /* DUK_USE_EXEC_PREFER_SIZE */ /* A -> target reg * B -> object reg/const (may be const e.g. in "'foo'[1]") * C -> key reg/const */ /* Opcode bits 0-1 are used to distinguish reg/const variants. * Opcode bits 2-3 are used to distinguish inc/dec variants: * Bit 2 = inc(0)/dec(1), bit 3 = pre(0)/post(1). */ DUK_ASSERT((DUK_OP_PREINCP_RR & 0x0c) == 0x00); DUK_ASSERT((DUK_OP_PREDECP_RR & 0x0c) == 0x04); DUK_ASSERT((DUK_OP_POSTINCP_RR & 0x0c) == 0x08); DUK_ASSERT((DUK_OP_POSTDECP_RR & 0x0c) == 0x0c); tv_obj = DUK__REGCONSTP_B(ins); tv_key = DUK__REGCONSTP_C(ins); rc = duk_hobject_getprop(thr, tv_obj, tv_key); /* -> [val] */ DUK_UNREF(rc); /* ignore */ tv_obj = NULL; /* invalidated */ tv_key = NULL; /* invalidated */ /* XXX: Fastint fast path would be useful here. Also fastints * now lose their fastint status in current handling which is * not intuitive. */ x = duk_to_number_m1(thr); duk_pop_unsafe(thr); if (ins & DUK_BC_INCDECP_FLAG_DEC) { y = x - 1.0; } else { y = x + 1.0; } duk_push_number(thr, y); tv_val = DUK_GET_TVAL_NEGIDX(thr, -1); DUK_ASSERT(tv_val != NULL); tv_obj = DUK__REGCONSTP_B(ins); tv_key = DUK__REGCONSTP_C(ins); rc = duk_hobject_putprop(thr, tv_obj, tv_key, tv_val, DUK__STRICT()); DUK_UNREF(rc); /* ignore */ tv_obj = NULL; /* invalidated */ tv_key = NULL; /* invalidated */ duk_pop_unsafe(thr); z = (ins & DUK_BC_INCDECP_FLAG_POST) ? x : y; #if defined(DUK_USE_EXEC_PREFER_SIZE) duk_push_number(thr, z); DUK__REPLACE_TOP_A_BREAK(); #else tv_dst = DUK__REGP_A(ins); DUK_TVAL_SET_NUMBER_UPDREF(thr, tv_dst, z); break; #endif } /* XXX: GETPROP where object is 'this', GETPROPT? * Occurs relatively often in object oriented code. */ #define DUK__GETPROP_BODY(barg,carg) { \ /* A -> target reg \ * B -> object reg/const (may be const e.g. in "'foo'[1]") \ * C -> key reg/const \ */ \ (void) duk_hobject_getprop(thr, (barg), (carg)); \ DUK__REPLACE_TOP_A_BREAK(); \ } #define DUK__GETPROPC_BODY(barg,carg) { \ /* Same as GETPROP but callability check for property-based calls. */ \ duk_tval *tv__targ; \ (void) duk_hobject_getprop(thr, (barg), (carg)); \ DUK_GC_TORTURE(thr->heap); \ tv__targ = DUK_GET_TVAL_NEGIDX(thr, -1); \ if (DUK_UNLIKELY(!duk_is_callable_tval(thr, tv__targ))) { \ /* Here we intentionally re-evaluate the macro \ * arguments to deal with potentially changed \ * valstack base pointer! \ */ \ duk_call_setup_propcall_error(thr, (barg), (carg)); \ } \ DUK__REPLACE_TOP_A_BREAK(); \ } #define DUK__PUTPROP_BODY(aarg,barg,carg) { \ /* A -> object reg \ * B -> key reg/const \ * C -> value reg/const \ * \ * Note: intentional difference to register arrangement \ * of e.g. GETPROP; 'A' must contain a register-only value. \ */ \ (void) duk_hobject_putprop(thr, (aarg), (barg), (carg), DUK__STRICT()); \ break; \ } #define DUK__DELPROP_BODY(barg,carg) { \ /* A -> result reg \ * B -> object reg \ * C -> key reg/const \ */ \ duk_bool_t rc; \ rc = duk_hobject_delprop(thr, (barg), (carg), DUK__STRICT()); \ DUK_ASSERT(rc == 0 || rc == 1); \ DUK__REPLACE_BOOL_A_BREAK(rc); \ } #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_GETPROP_RR: case DUK_OP_GETPROP_CR: case DUK_OP_GETPROP_RC: case DUK_OP_GETPROP_CC: DUK__GETPROP_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); #if defined(DUK_USE_VERBOSE_ERRORS) case DUK_OP_GETPROPC_RR: case DUK_OP_GETPROPC_CR: case DUK_OP_GETPROPC_RC: case DUK_OP_GETPROPC_CC: DUK__GETPROPC_BODY(DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); #endif case DUK_OP_PUTPROP_RR: case DUK_OP_PUTPROP_CR: case DUK_OP_PUTPROP_RC: case DUK_OP_PUTPROP_CC: DUK__PUTPROP_BODY(DUK__REGP_A(ins), DUK__REGCONSTP_B(ins), DUK__REGCONSTP_C(ins)); case DUK_OP_DELPROP_RR: case DUK_OP_DELPROP_RC: /* B is always reg */ DUK__DELPROP_BODY(DUK__REGP_B(ins), DUK__REGCONSTP_C(ins)); #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_GETPROP_RR: DUK__GETPROP_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_GETPROP_CR: DUK__GETPROP_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_GETPROP_RC: DUK__GETPROP_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_GETPROP_CC: DUK__GETPROP_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); #if defined(DUK_USE_VERBOSE_ERRORS) case DUK_OP_GETPROPC_RR: DUK__GETPROPC_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_GETPROPC_CR: DUK__GETPROPC_BODY(DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_GETPROPC_RC: DUK__GETPROPC_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_GETPROPC_CC: DUK__GETPROPC_BODY(DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); #endif case DUK_OP_PUTPROP_RR: DUK__PUTPROP_BODY(DUK__REGP_A(ins), DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_PUTPROP_CR: DUK__PUTPROP_BODY(DUK__REGP_A(ins), DUK__CONSTP_B(ins), DUK__REGP_C(ins)); case DUK_OP_PUTPROP_RC: DUK__PUTPROP_BODY(DUK__REGP_A(ins), DUK__REGP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_PUTPROP_CC: DUK__PUTPROP_BODY(DUK__REGP_A(ins), DUK__CONSTP_B(ins), DUK__CONSTP_C(ins)); case DUK_OP_DELPROP_RR: /* B is always reg */ DUK__DELPROP_BODY(DUK__REGP_B(ins), DUK__REGP_C(ins)); case DUK_OP_DELPROP_RC: DUK__DELPROP_BODY(DUK__REGP_B(ins), DUK__CONSTP_C(ins)); #endif /* DUK_USE_EXEC_PREFER_SIZE */ /* No fast path for DECLVAR now, it's quite a rare instruction. */ case DUK_OP_DECLVAR_RR: case DUK_OP_DECLVAR_CR: case DUK_OP_DECLVAR_RC: case DUK_OP_DECLVAR_CC: { duk_activation *act; duk_small_uint_fast_t a = DUK_DEC_A(ins); duk_tval *tv1; duk_hstring *name; duk_small_uint_t prop_flags; duk_bool_t is_func_decl; tv1 = DUK__REGCONSTP_B(ins); DUK_ASSERT(DUK_TVAL_IS_STRING(tv1)); name = DUK_TVAL_GET_STRING(tv1); DUK_ASSERT(name != NULL); is_func_decl = ((a & DUK_BC_DECLVAR_FLAG_FUNC_DECL) != 0); /* XXX: declvar takes an duk_tval pointer, which is awkward and * should be reworked. */ /* Compiler is responsible for selecting property flags (configurability, * writability, etc). */ prop_flags = a & DUK_PROPDESC_FLAGS_MASK; if (is_func_decl) { duk_push_tval(thr, DUK__REGCONSTP_C(ins)); } else { DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top)); /* valstack policy */ thr->valstack_top++; } tv1 = DUK_GET_TVAL_NEGIDX(thr, -1); act = thr->callstack_curr; if (duk_js_declvar_activation(thr, act, name, tv1, prop_flags, is_func_decl)) { if (is_func_decl) { /* Already declared, update value. */ tv1 = DUK_GET_TVAL_NEGIDX(thr, -1); duk_js_putvar_activation(thr, act, name, tv1, DUK__STRICT()); } else { /* Already declared but no initializer value * (e.g. 'var xyz;'), no-op. */ } } duk_pop_unsafe(thr); break; } #if defined(DUK_USE_REGEXP_SUPPORT) /* The compiler should never emit DUK_OP_REGEXP if there is no * regexp support. */ case DUK_OP_REGEXP_RR: case DUK_OP_REGEXP_CR: case DUK_OP_REGEXP_RC: case DUK_OP_REGEXP_CC: { /* A -> target register * B -> bytecode (also contains flags) * C -> escaped source */ duk_push_tval(thr, DUK__REGCONSTP_C(ins)); duk_push_tval(thr, DUK__REGCONSTP_B(ins)); /* -> [ ... escaped_source bytecode ] */ duk_regexp_create_instance(thr); /* -> [ ... regexp_instance ] */ DUK__REPLACE_TOP_A_BREAK(); } #endif /* DUK_USE_REGEXP_SUPPORT */ /* XXX: 'c' is unused, use whole BC, etc. */ case DUK_OP_CSVAR_RR: case DUK_OP_CSVAR_CR: case DUK_OP_CSVAR_RC: case DUK_OP_CSVAR_CC: { /* The speciality of calling through a variable binding is that the * 'this' value may be provided by the variable lookup: E5 Section 6.b.i. * * The only (standard) case where the 'this' binding is non-null is when * (1) the variable is found in an object environment record, and * (2) that object environment record is a 'with' block. */ duk_activation *act; duk_uint_fast_t idx; duk_tval *tv1; duk_hstring *name; /* A -> target registers (A, A + 1) for call setup * B -> identifier name, usually constant but can be a register due to shuffling */ tv1 = DUK__REGCONSTP_B(ins); DUK_ASSERT(DUK_TVAL_IS_STRING(tv1)); name = DUK_TVAL_GET_STRING(tv1); DUK_ASSERT(name != NULL); act = thr->callstack_curr; (void) duk_js_getvar_activation(thr, act, name, 1 /*throw*/); /* -> [... val this] */ idx = (duk_uint_fast_t) DUK_DEC_A(ins); /* Could add direct value stack handling. */ duk_replace(thr, (duk_idx_t) (idx + 1)); /* 'this' binding */ duk_replace(thr, (duk_idx_t) idx); /* variable value (function, we hope, not checked here) */ break; } case DUK_OP_CLOSURE: { duk_activation *act; duk_hcompfunc *fun_act; duk_small_uint_fast_t bc = DUK_DEC_BC(ins); duk_hobject *fun_temp; /* A -> target reg * BC -> inner function index */ DUK_DDD(DUK_DDDPRINT("CLOSURE to target register %ld, fnum %ld (count %ld)", (long) DUK_DEC_A(ins), (long) DUK_DEC_BC(ins), (long) DUK_HCOMPFUNC_GET_FUNCS_COUNT(thr->heap, DUK__FUN()))); DUK_ASSERT_DISABLE(bc >= 0); /* unsigned */ DUK_ASSERT((duk_uint_t) bc < (duk_uint_t) DUK_HCOMPFUNC_GET_FUNCS_COUNT(thr->heap, DUK__FUN())); act = thr->callstack_curr; fun_act = (duk_hcompfunc *) DUK_ACT_GET_FUNC(act); fun_temp = DUK_HCOMPFUNC_GET_FUNCS_BASE(thr->heap, fun_act)[bc]; DUK_ASSERT(fun_temp != NULL); DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC(fun_temp)); DUK_DDD(DUK_DDDPRINT("CLOSURE: function template is: %p -> %!O", (void *) fun_temp, (duk_heaphdr *) fun_temp)); if (act->lex_env == NULL) { DUK_ASSERT(act->var_env == NULL); duk_js_init_activation_environment_records_delayed(thr, act); act = thr->callstack_curr; } DUK_ASSERT(act->lex_env != NULL); DUK_ASSERT(act->var_env != NULL); /* functions always have a NEWENV flag, i.e. they get a * new variable declaration environment, so only lex_env * matters here. */ duk_js_push_closure(thr, (duk_hcompfunc *) fun_temp, act->var_env, act->lex_env, 1 /*add_auto_proto*/); DUK__REPLACE_TOP_A_BREAK(); } case DUK_OP_GETVAR: { duk_activation *act; duk_tval *tv1; duk_hstring *name; tv1 = DUK__CONSTP_BC(ins); DUK_ASSERT(DUK_TVAL_IS_STRING(tv1)); name = DUK_TVAL_GET_STRING(tv1); DUK_ASSERT(name != NULL); act = thr->callstack_curr; DUK_ASSERT(act != NULL); (void) duk_js_getvar_activation(thr, act, name, 1 /*throw*/); /* -> [... val this] */ duk_pop_unsafe(thr); /* 'this' binding is not needed here */ DUK__REPLACE_TOP_A_BREAK(); } case DUK_OP_PUTVAR: { duk_activation *act; duk_tval *tv1; duk_hstring *name; tv1 = DUK__CONSTP_BC(ins); DUK_ASSERT(DUK_TVAL_IS_STRING(tv1)); name = DUK_TVAL_GET_STRING(tv1); DUK_ASSERT(name != NULL); /* XXX: putvar takes a duk_tval pointer, which is awkward and * should be reworked. */ tv1 = DUK__REGP_A(ins); /* val */ act = thr->callstack_curr; duk_js_putvar_activation(thr, act, name, tv1, DUK__STRICT()); break; } case DUK_OP_DELVAR: { duk_activation *act; duk_tval *tv1; duk_hstring *name; duk_bool_t rc; tv1 = DUK__CONSTP_BC(ins); DUK_ASSERT(DUK_TVAL_IS_STRING(tv1)); name = DUK_TVAL_GET_STRING(tv1); DUK_ASSERT(name != NULL); act = thr->callstack_curr; rc = duk_js_delvar_activation(thr, act, name); DUK__REPLACE_BOOL_A_BREAK(rc); } case DUK_OP_JUMP: { /* Note: without explicit cast to signed, MSVC will * apparently generate a large positive jump when the * bias-corrected value would normally be negative. */ curr_pc += (duk_int_fast_t) DUK_DEC_ABC(ins) - (duk_int_fast_t) DUK_BC_JUMP_BIAS; break; } #define DUK__RETURN_SHARED() do { \ duk_small_uint_t ret_result; \ /* duk__handle_return() is guaranteed never to throw, except \ * for potential out-of-memory situations which will then \ * propagate out of the executor longjmp handler. \ */ \ DUK_ASSERT(thr->ptr_curr_pc == NULL); \ ret_result = duk__handle_return(thr, entry_act); \ if (ret_result == DUK__RETHAND_RESTART) { \ goto restart_execution; \ } \ DUK_ASSERT(ret_result == DUK__RETHAND_FINISHED); \ return; \ } while (0) #if defined(DUK_USE_EXEC_PREFER_SIZE) case DUK_OP_RETREG: case DUK_OP_RETCONST: case DUK_OP_RETCONSTN: case DUK_OP_RETUNDEF: { /* BC -> return value reg/const */ DUK__SYNC_AND_NULL_CURR_PC(); if (op == DUK_OP_RETREG) { duk_push_tval(thr, DUK__REGP_BC(ins)); } else if (op == DUK_OP_RETUNDEF) { DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top)); /* valstack policy */ thr->valstack_top++; } else { DUK_ASSERT(op == DUK_OP_RETCONST || op == DUK_OP_RETCONSTN); duk_push_tval(thr, DUK__CONSTP_BC(ins)); } DUK__RETURN_SHARED(); } #else /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_RETREG: { duk_tval *tv; DUK__SYNC_AND_NULL_CURR_PC(); tv = DUK__REGP_BC(ins); DUK_TVAL_SET_TVAL(thr->valstack_top, tv); DUK_TVAL_INCREF(thr, tv); thr->valstack_top++; DUK__RETURN_SHARED(); } /* This will be unused without refcounting. */ case DUK_OP_RETCONST: { duk_tval *tv; DUK__SYNC_AND_NULL_CURR_PC(); tv = DUK__CONSTP_BC(ins); DUK_TVAL_SET_TVAL(thr->valstack_top, tv); DUK_TVAL_INCREF(thr, tv); thr->valstack_top++; DUK__RETURN_SHARED(); } case DUK_OP_RETCONSTN: { duk_tval *tv; DUK__SYNC_AND_NULL_CURR_PC(); tv = DUK__CONSTP_BC(ins); DUK_TVAL_SET_TVAL(thr->valstack_top, tv); #if defined(DUK_USE_REFERENCE_COUNTING) /* Without refcounting only RETCONSTN is used. */ DUK_ASSERT(!DUK_TVAL_IS_HEAP_ALLOCATED(tv)); /* no INCREF for this constant */ #endif thr->valstack_top++; DUK__RETURN_SHARED(); } case DUK_OP_RETUNDEF: { DUK__SYNC_AND_NULL_CURR_PC(); thr->valstack_top++; /* value at valstack top is already undefined by valstack policy */ DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top)); DUK__RETURN_SHARED(); } #endif /* DUK_USE_EXEC_PREFER_SIZE */ case DUK_OP_LABEL: { duk_activation *act; duk_catcher *cat; duk_small_uint_fast_t bc = DUK_DEC_BC(ins); /* Allocate catcher and populate it (must be atomic). */ cat = duk_hthread_catcher_alloc(thr); DUK_ASSERT(cat != NULL); cat->flags = (duk_uint32_t) (DUK_CAT_TYPE_LABEL | (bc << DUK_CAT_LABEL_SHIFT)); cat->pc_base = (duk_instr_t *) curr_pc; /* pre-incremented, points to first jump slot */ cat->idx_base = 0; /* unused for label */ cat->h_varname = NULL; act = thr->callstack_curr; DUK_ASSERT(act != NULL); cat->parent = act->cat; act->cat = cat; DUK_DDD(DUK_DDDPRINT("LABEL catcher: flags=0x%08lx, pc_base=%ld, " "idx_base=%ld, h_varname=%!O, label_id=%ld", (long) cat->flags, (long) cat->pc_base, (long) cat->idx_base, (duk_heaphdr *) cat->h_varname, (long) DUK_CAT_GET_LABEL(cat))); curr_pc += 2; /* skip jump slots */ break; } case DUK_OP_ENDLABEL: { duk_activation *act; #if (defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2)) || defined(DUK_USE_ASSERTIONS) duk_small_uint_fast_t bc = DUK_DEC_BC(ins); #endif #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) DUK_DDD(DUK_DDDPRINT("ENDLABEL %ld", (long) bc)); #endif act = thr->callstack_curr; DUK_ASSERT(act->cat != NULL); DUK_ASSERT(DUK_CAT_GET_TYPE(act->cat) == DUK_CAT_TYPE_LABEL); DUK_ASSERT((duk_uint_fast_t) DUK_CAT_GET_LABEL(act->cat) == bc); duk_hthread_catcher_unwind_nolexenv_norz(thr, act); /* no need to unwind callstack */ break; } case DUK_OP_BREAK: { duk_small_uint_fast_t bc = DUK_DEC_BC(ins); DUK__SYNC_AND_NULL_CURR_PC(); duk__handle_break_or_continue(thr, (duk_uint_t) bc, DUK_LJ_TYPE_BREAK); goto restart_execution; } case DUK_OP_CONTINUE: { duk_small_uint_fast_t bc = DUK_DEC_BC(ins); DUK__SYNC_AND_NULL_CURR_PC(); duk__handle_break_or_continue(thr, (duk_uint_t) bc, DUK_LJ_TYPE_CONTINUE); goto restart_execution; } /* XXX: move to helper, too large to be inline here */ case DUK_OP_TRYCATCH: { duk__handle_op_trycatch(thr, ins, curr_pc); curr_pc += 2; /* skip jump slots */ break; } case DUK_OP_ENDTRY: { curr_pc = duk__handle_op_endtry(thr, ins); break; } case DUK_OP_ENDCATCH: { duk__handle_op_endcatch(thr, ins); break; } case DUK_OP_ENDFIN: { /* Sync and NULL early. */ DUK__SYNC_AND_NULL_CURR_PC(); if (duk__handle_op_endfin(thr, ins, entry_act) != 0) { return; } /* Must restart because we NULLed out curr_pc. */ goto restart_execution; } case DUK_OP_THROW: { duk_small_uint_fast_t bc = DUK_DEC_BC(ins); /* Note: errors are augmented when they are created, not * when they are thrown. So, don't augment here, it would * break re-throwing for instance. */ /* Sync so that augmentation sees up-to-date activations, NULL * thr->ptr_curr_pc so that it's not used if side effects occur * in augmentation or longjmp handling. */ DUK__SYNC_AND_NULL_CURR_PC(); duk_dup(thr, (duk_idx_t) bc); DUK_DDD(DUK_DDDPRINT("THROW ERROR (BYTECODE): %!dT (before throw augment)", (duk_tval *) duk_get_tval(thr, -1))); #if defined(DUK_USE_AUGMENT_ERROR_THROW) duk_err_augment_error_throw(thr); DUK_DDD(DUK_DDDPRINT("THROW ERROR (BYTECODE): %!dT (after throw augment)", (duk_tval *) duk_get_tval(thr, -1))); #endif duk_err_setup_ljstate1(thr, DUK_LJ_TYPE_THROW, DUK_GET_TVAL_NEGIDX(thr, -1)); #if defined(DUK_USE_DEBUGGER_SUPPORT) duk_err_check_debugger_integration(thr); #endif DUK_ASSERT(thr->heap->lj.jmpbuf_ptr != NULL); /* always in executor */ duk_err_longjmp(thr); DUK_UNREACHABLE(); break; } case DUK_OP_CSREG: { /* * Assuming a register binds to a variable declared within this * function (a declarative binding), the 'this' for the call * setup is always 'undefined'. E5 Section 10.2.1.1.6. */ duk_small_uint_fast_t a = DUK_DEC_A(ins); duk_small_uint_fast_t bc = DUK_DEC_BC(ins); /* A -> register containing target function (not type checked here) * BC -> target registers (BC, BC + 1) for call setup */ #if defined(DUK_USE_PREFER_SIZE) duk_dup(thr, (duk_idx_t) a); duk_replace(thr, (duk_idx_t) bc); duk_to_undefined(thr, (duk_idx_t) (bc + 1)); #else duk_tval *tv1; duk_tval *tv2; duk_tval *tv3; duk_tval tv_tmp1; duk_tval tv_tmp2; tv1 = DUK__REGP(bc); tv2 = tv1 + 1; DUK_TVAL_SET_TVAL(&tv_tmp1, tv1); DUK_TVAL_SET_TVAL(&tv_tmp2, tv2); tv3 = DUK__REGP(a); DUK_TVAL_SET_TVAL(tv1, tv3); DUK_TVAL_INCREF(thr, tv1); /* no side effects */ DUK_TVAL_SET_UNDEFINED(tv2); /* no need for incref */ DUK_TVAL_DECREF(thr, &tv_tmp1); DUK_TVAL_DECREF(thr, &tv_tmp2); #endif break; } /* XXX: in some cases it's faster NOT to reuse the value * stack but rather copy the arguments on top of the stack * (mainly when the calling value stack is large and the value * stack resize would be large). */ case DUK_OP_CALL0: case DUK_OP_CALL1: case DUK_OP_CALL2: case DUK_OP_CALL3: case DUK_OP_CALL4: case DUK_OP_CALL5: case DUK_OP_CALL6: case DUK_OP_CALL7: { /* Opcode packs 4 flag bits: 1 for indirect, 3 map * 1:1 to three lowest call handling flags. * * A -> nargs or register with nargs (indirect) * BC -> base register for call (base -> func, base+1 -> this, base+2 -> arg1 ... base+2+N-1 -> argN) */ duk_idx_t nargs; duk_idx_t idx; duk_small_uint_t call_flags; #if !defined(DUK_USE_EXEC_FUN_LOCAL) duk_hcompfunc *fun; #endif DUK_ASSERT((DUK_OP_CALL0 & 0x0fU) == 0); DUK_ASSERT((ins & DUK_BC_CALL_FLAG_INDIRECT) == 0); nargs = (duk_idx_t) DUK_DEC_A(ins); call_flags = (ins & 0x07U) | DUK_CALL_FLAG_ALLOW_ECMATOECMA; idx = (duk_idx_t) DUK_DEC_BC(ins); if (duk__executor_handle_call(thr, idx, nargs, call_flags)) { /* curr_pc synced by duk_handle_call_unprotected() */ DUK_ASSERT(thr->ptr_curr_pc == NULL); goto restart_execution; } DUK_ASSERT(thr->ptr_curr_pc != NULL); /* duk_js_call.c is required to restore the stack reserve * so we only need to reset the top. */ #if !defined(DUK_USE_EXEC_FUN_LOCAL) fun = DUK__FUN(); #endif duk_set_top_unsafe(thr, (duk_idx_t) fun->nregs); /* No need to reinit setjmp() catchpoint, as call handling * will store and restore our state. * * When debugger is enabled, we need to recheck the activation * status after returning. This is now handled by call handling * and heap->dbg_force_restart. */ break; } case DUK_OP_CALL8: case DUK_OP_CALL9: case DUK_OP_CALL10: case DUK_OP_CALL11: case DUK_OP_CALL12: case DUK_OP_CALL13: case DUK_OP_CALL14: case DUK_OP_CALL15: { /* Indirect variant. */ duk_uint_fast_t nargs; duk_idx_t idx; duk_small_uint_t call_flags; #if !defined(DUK_USE_EXEC_FUN_LOCAL) duk_hcompfunc *fun; #endif DUK_ASSERT((DUK_OP_CALL0 & 0x0fU) == 0); DUK_ASSERT((ins & DUK_BC_CALL_FLAG_INDIRECT) != 0); nargs = (duk_uint_fast_t) DUK_DEC_A(ins); DUK__LOOKUP_INDIRECT(nargs); call_flags = (ins & 0x07U) | DUK_CALL_FLAG_ALLOW_ECMATOECMA; idx = (duk_idx_t) DUK_DEC_BC(ins); if (duk__executor_handle_call(thr, idx, (duk_idx_t) nargs, call_flags)) { DUK_ASSERT(thr->ptr_curr_pc == NULL); goto restart_execution; } DUK_ASSERT(thr->ptr_curr_pc != NULL); #if !defined(DUK_USE_EXEC_FUN_LOCAL) fun = DUK__FUN(); #endif duk_set_top_unsafe(thr, (duk_idx_t) fun->nregs); break; } case DUK_OP_NEWOBJ: { duk_push_object(thr); #if defined(DUK_USE_ASSERTIONS) { duk_hobject *h; h = duk_require_hobject(thr, -1); DUK_ASSERT(DUK_HOBJECT_GET_ESIZE(h) == 0); DUK_ASSERT(DUK_HOBJECT_GET_ENEXT(h) == 0); DUK_ASSERT(DUK_HOBJECT_GET_ASIZE(h) == 0); DUK_ASSERT(DUK_HOBJECT_GET_HSIZE(h) == 0); } #endif #if !defined(DUK_USE_PREFER_SIZE) /* XXX: could do a direct props realloc, but need hash size */ duk_hobject_resize_entrypart(thr, duk_known_hobject(thr, -1), DUK_DEC_A(ins)); #endif DUK__REPLACE_TOP_BC_BREAK(); } case DUK_OP_NEWARR: { duk_push_array(thr); #if defined(DUK_USE_ASSERTIONS) { duk_hobject *h; h = duk_require_hobject(thr, -1); DUK_ASSERT(DUK_HOBJECT_GET_ESIZE(h) == 0); DUK_ASSERT(DUK_HOBJECT_GET_ENEXT(h) == 0); DUK_ASSERT(DUK_HOBJECT_GET_ASIZE(h) == 0); DUK_ASSERT(DUK_HOBJECT_GET_HSIZE(h) == 0); DUK_ASSERT(DUK_HOBJECT_HAS_ARRAY_PART(h)); } #endif #if !defined(DUK_USE_PREFER_SIZE) duk_hobject_realloc_props(thr, duk_known_hobject(thr, -1), 0 /*new_e_size*/, DUK_DEC_A(ins) /*new_a_size*/, 0 /*new_h_size*/, 0 /*abandon_array*/); #if 0 duk_hobject_resize_arraypart(thr, duk_known_hobject(thr, -1), DUK_DEC_A(ins)); #endif #endif DUK__REPLACE_TOP_BC_BREAK(); } case DUK_OP_MPUTOBJ: case DUK_OP_MPUTOBJI: { duk_idx_t obj_idx; duk_uint_fast_t idx, idx_end; duk_small_uint_fast_t count; /* A -> register of target object * B -> first register of key/value pair list * or register containing first register number if indirect * C -> number of key/value pairs * 2 * (= number of value stack indices used starting from 'B') */ obj_idx = DUK_DEC_A(ins); DUK_ASSERT(duk_is_object(thr, obj_idx)); idx = (duk_uint_fast_t) DUK_DEC_B(ins); if (DUK_DEC_OP(ins) == DUK_OP_MPUTOBJI) { DUK__LOOKUP_INDIRECT(idx); } count = (duk_small_uint_fast_t) DUK_DEC_C(ins); DUK_ASSERT(count > 0); /* compiler guarantees */ idx_end = idx + count; #if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK) if (DUK_UNLIKELY(idx_end > (duk_uint_fast_t) duk_get_top(thr))) { /* XXX: use duk_is_valid_index() instead? */ /* XXX: improve check; check against nregs, not against top */ DUK__INTERNAL_ERROR("MPUTOBJ out of bounds"); } #endif /* Use 'force' flag to duk_def_prop() to ensure that any * inherited properties don't prevent the operation. * With ES2015 duplicate properties are allowed, so that we * must overwrite any previous data or accessor property. * * With ES2015 computed property names the literal keys * may be arbitrary values and need to be ToPropertyKey() * coerced at runtime. */ do { /* XXX: faster initialization (direct access or better primitives) */ duk_dup(thr, (duk_idx_t) idx); duk_dup(thr, (duk_idx_t) (idx + 1)); duk_def_prop(thr, obj_idx, DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_FORCE | DUK_DEFPROP_SET_WRITABLE | DUK_DEFPROP_SET_ENUMERABLE | DUK_DEFPROP_SET_CONFIGURABLE); idx += 2; } while (idx < idx_end); break; } case DUK_OP_INITSET: case DUK_OP_INITGET: { duk__handle_op_initset_initget(thr, ins); break; } case DUK_OP_MPUTARR: case DUK_OP_MPUTARRI: { duk_idx_t obj_idx; duk_uint_fast_t idx, idx_end; duk_small_uint_fast_t count; duk_tval *tv1; duk_uint32_t arr_idx; /* A -> register of target object * B -> first register of value data (start_index, value1, value2, ..., valueN) * or register containing first register number if indirect * C -> number of key/value pairs (N) */ obj_idx = DUK_DEC_A(ins); DUK_ASSERT(duk_is_object(thr, obj_idx)); idx = (duk_uint_fast_t) DUK_DEC_B(ins); if (DUK_DEC_OP(ins) == DUK_OP_MPUTARRI) { DUK__LOOKUP_INDIRECT(idx); } count = (duk_small_uint_fast_t) DUK_DEC_C(ins); DUK_ASSERT(count > 0 + 1); /* compiler guarantees */ idx_end = idx + count; #if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK) if (idx_end > (duk_uint_fast_t) duk_get_top(thr)) { /* XXX: use duk_is_valid_index() instead? */ /* XXX: improve check; check against nregs, not against top */ DUK__INTERNAL_ERROR("MPUTARR out of bounds"); } #endif tv1 = DUK__REGP(idx); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1)); #if defined(DUK_USE_FASTINT) DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv1)); arr_idx = (duk_uint32_t) DUK_TVAL_GET_FASTINT_U32(tv1); #else arr_idx = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv1); #endif idx++; do { /* duk_xdef_prop() will define an own property without any array * special behaviors. We'll need to set the array length explicitly * in the end. For arrays with elisions, the compiler will emit an * explicit SETALEN which will update the length. */ /* XXX: because we're dealing with 'own' properties of a fresh array, * the array initializer should just ensure that the array has a large * enough array part and write the values directly into array part, * and finally set 'length' manually in the end (as already happens now). */ duk_dup(thr, (duk_idx_t) idx); duk_xdef_prop_index_wec(thr, obj_idx, arr_idx); idx++; arr_idx++; } while (idx < idx_end); /* XXX: E5.1 Section 11.1.4 coerces the final length through * ToUint32() which is odd but happens now as a side effect of * 'arr_idx' type. */ duk_set_length(thr, obj_idx, (duk_size_t) (duk_uarridx_t) arr_idx); break; } case DUK_OP_SETALEN: { duk_tval *tv1; duk_hobject *h; duk_uint32_t len; tv1 = DUK__REGP_A(ins); DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv1)); h = DUK_TVAL_GET_OBJECT(tv1); DUK_ASSERT(DUK_HOBJECT_IS_ARRAY(h)); tv1 = DUK__REGP_BC(ins); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1)); #if defined(DUK_USE_FASTINT) DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv1)); len = (duk_uint32_t) DUK_TVAL_GET_FASTINT_U32(tv1); #else len = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv1); #endif ((duk_harray *) h)->length = len; break; } case DUK_OP_INITENUM: { duk__handle_op_initenum(thr, ins); break; } case DUK_OP_NEXTENUM: { curr_pc += duk__handle_op_nextenum(thr, ins); break; } case DUK_OP_INVLHS: { DUK_ERROR_REFERENCE(thr, DUK_STR_INVALID_LVALUE); DUK_WO_NORETURN(return;); break; } case DUK_OP_DEBUGGER: { /* Opcode only emitted by compiler when debugger * support is enabled. Ignore it silently without * debugger support, in case it has been loaded * from precompiled bytecode. */ #if defined(DUK_USE_DEBUGGER_SUPPORT) if (duk_debug_is_attached(thr->heap)) { DUK_D(DUK_DPRINT("DEBUGGER statement encountered, halt execution")); DUK__SYNC_AND_NULL_CURR_PC(); duk_debug_halt_execution(thr, 1 /*use_prev_pc*/); DUK_D(DUK_DPRINT("DEBUGGER statement finished, resume execution")); goto restart_execution; } else { DUK_D(DUK_DPRINT("DEBUGGER statement ignored, debugger not attached")); } #else DUK_D(DUK_DPRINT("DEBUGGER statement ignored, no debugger support")); #endif break; } case DUK_OP_NOP: { /* Nop, ignored, but ABC fields may carry a value e.g. * for indirect opcode handling. */ break; } case DUK_OP_INVALID: { DUK_ERROR_FMT1(thr, DUK_ERR_ERROR, "INVALID opcode (%ld)", (long) DUK_DEC_ABC(ins)); DUK_WO_NORETURN(return;); break; } #if defined(DUK_USE_ES6) case DUK_OP_NEWTARGET: { duk_push_new_target(thr); DUK__REPLACE_TOP_BC_BREAK(); } #endif /* DUK_USE_ES6 */ #if !defined(DUK_USE_EXEC_PREFER_SIZE) #if !defined(DUK_USE_ES7_EXP_OPERATOR) case DUK_OP_EXP_RR: case DUK_OP_EXP_CR: case DUK_OP_EXP_RC: case DUK_OP_EXP_CC: #endif #if !defined(DUK_USE_ES6) case DUK_OP_NEWTARGET: #endif #if !defined(DUK_USE_VERBOSE_ERRORS) case DUK_OP_GETPROPC_RR: case DUK_OP_GETPROPC_CR: case DUK_OP_GETPROPC_RC: case DUK_OP_GETPROPC_CC: #endif case DUK_OP_UNUSED207: case DUK_OP_UNUSED212: case DUK_OP_UNUSED213: case DUK_OP_UNUSED214: case DUK_OP_UNUSED215: case DUK_OP_UNUSED216: case DUK_OP_UNUSED217: case DUK_OP_UNUSED218: case DUK_OP_UNUSED219: case DUK_OP_UNUSED220: case DUK_OP_UNUSED221: case DUK_OP_UNUSED222: case DUK_OP_UNUSED223: case DUK_OP_UNUSED224: case DUK_OP_UNUSED225: case DUK_OP_UNUSED226: case DUK_OP_UNUSED227: case DUK_OP_UNUSED228: case DUK_OP_UNUSED229: case DUK_OP_UNUSED230: case DUK_OP_UNUSED231: case DUK_OP_UNUSED232: case DUK_OP_UNUSED233: case DUK_OP_UNUSED234: case DUK_OP_UNUSED235: case DUK_OP_UNUSED236: case DUK_OP_UNUSED237: case DUK_OP_UNUSED238: case DUK_OP_UNUSED239: case DUK_OP_UNUSED240: case DUK_OP_UNUSED241: case DUK_OP_UNUSED242: case DUK_OP_UNUSED243: case DUK_OP_UNUSED244: case DUK_OP_UNUSED245: case DUK_OP_UNUSED246: case DUK_OP_UNUSED247: case DUK_OP_UNUSED248: case DUK_OP_UNUSED249: case DUK_OP_UNUSED250: case DUK_OP_UNUSED251: case DUK_OP_UNUSED252: case DUK_OP_UNUSED253: case DUK_OP_UNUSED254: case DUK_OP_UNUSED255: /* Force all case clauses to map to an actual handler * so that the compiler can emit a jump without a bounds * check: the switch argument is a duk_uint8_t so that * the compiler may be able to figure it out. This is * a small detail and obviously compiler dependent. */ /* default: clause omitted on purpose */ #else /* DUK_USE_EXEC_PREFER_SIZE */ default: #endif /* DUK_USE_EXEC_PREFER_SIZE */ { /* Default case catches invalid/unsupported opcodes. */ DUK_D(DUK_DPRINT("invalid opcode: %ld - %!I", (long) op, ins)); DUK__INTERNAL_ERROR("invalid opcode"); break; } } /* end switch */ continue; /* Some shared exit paths for opcode handling below. These * are mostly useful to reduce code footprint when multiple * opcodes have a similar epilogue (like replacing stack top * with index 'a'). */ #if defined(DUK_USE_EXEC_PREFER_SIZE) replace_top_a: DUK__REPLACE_TO_TVPTR(thr, DUK__REGP_A(ins)); continue; replace_top_bc: DUK__REPLACE_TO_TVPTR(thr, DUK__REGP_BC(ins)); continue; #endif } DUK_WO_NORETURN(return;); #if !defined(DUK_USE_VERBOSE_EXECUTOR_ERRORS) internal_error: DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return;); #endif } /* automatic undefs */ #undef DUK__BYTEOFF_A #undef DUK__BYTEOFF_B #undef DUK__BYTEOFF_BC #undef DUK__BYTEOFF_C #undef DUK__COMPARE_BODY #undef DUK__CONST #undef DUK__CONSTP #undef DUK__CONSTP_A #undef DUK__CONSTP_B #undef DUK__CONSTP_BC #undef DUK__CONSTP_C #undef DUK__DELPROP_BODY #undef DUK__EQ_BODY #undef DUK__FUN #undef DUK__GETPROPC_BODY #undef DUK__GETPROP_BODY #undef DUK__GE_BODY #undef DUK__GT_BODY #undef DUK__INLINE_PERF #undef DUK__INSTOF_BODY #undef DUK__INTERNAL_ERROR #undef DUK__INT_NOACTION #undef DUK__INT_RESTART #undef DUK__IN_BODY #undef DUK__LE_BODY #undef DUK__LONGJMP_RESTART #undef DUK__LONGJMP_RETHROW #undef DUK__LOOKUP_INDIRECT #undef DUK__LT_BODY #undef DUK__MASK_A #undef DUK__MASK_B #undef DUK__MASK_BC #undef DUK__MASK_C #undef DUK__NEQ_BODY #undef DUK__NOINLINE_PERF #undef DUK__PUTPROP_BODY #undef DUK__RCBIT_B #undef DUK__RCBIT_C #undef DUK__REG #undef DUK__REGCONSTP_B #undef DUK__REGCONSTP_C #undef DUK__REGP #undef DUK__REGP_A #undef DUK__REGP_B #undef DUK__REGP_BC #undef DUK__REGP_C #undef DUK__REPLACE_BOOL_A_BREAK #undef DUK__REPLACE_TOP_A_BREAK #undef DUK__REPLACE_TOP_BC_BREAK #undef DUK__REPLACE_TO_TVPTR #undef DUK__RETHAND_FINISHED #undef DUK__RETHAND_RESTART #undef DUK__RETURN_SHARED #undef DUK__SEQ_BODY #undef DUK__SHIFT_A #undef DUK__SHIFT_B #undef DUK__SHIFT_BC #undef DUK__SHIFT_C #undef DUK__SNEQ_BODY #undef DUK__STRICT #undef DUK__SYNC_AND_NULL_CURR_PC #undef DUK__SYNC_CURR_PC #undef DUK__TVAL_SHIFT /* * ECMAScript specification algorithm and conversion helpers. * * These helpers encapsulate the primitive ECMAScript operation semantics, * and are used by the bytecode executor and the API (among other places). * Some primitives are only implemented as part of the API and have no * "internal" helper. This is the case when an internal helper would not * really be useful; e.g. the operation is rare, uses value stack heavily, * etc. * * The operation arguments depend on what is required to implement * the operation: * * - If an operation is simple and stateless, and has no side * effects, it won't take an duk_hthread argument and its * arguments may be duk_tval pointers (which are safe as long * as no side effects take place). * * - If complex coercions are required (e.g. a "ToNumber" coercion) * or errors may be thrown, the operation takes an duk_hthread * argument. This also implies that the operation may have * arbitrary side effects, invalidating any duk_tval pointers. * * - For operations with potential side effects, arguments can be * taken in several ways: * * a) as duk_tval pointers, which makes sense if the "common case" * can be resolved without side effects (e.g. coercion); the * arguments are pushed to the valstack for coercion if * necessary * * b) as duk_tval values * * c) implicitly on value stack top * * d) as indices to the value stack * * Future work: * * - Argument styles may not be the most sensible in every case now. * * - In-place coercions might be useful for several operations, if * in-place coercion is OK for the bytecode executor and the API. */ /* #include duk_internal.h -> already included */ /* * ToPrimitive() (E5 Section 9.1) * * ==> implemented in the API. */ /* * ToBoolean() (E5 Section 9.2) */ DUK_INTERNAL duk_bool_t duk_js_toboolean(duk_tval *tv) { switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNDEFINED: case DUK_TAG_NULL: return 0; case DUK_TAG_BOOLEAN: DUK_ASSERT(DUK_TVAL_GET_BOOLEAN(tv) == 0 || DUK_TVAL_GET_BOOLEAN(tv) == 1); return DUK_TVAL_GET_BOOLEAN(tv); case DUK_TAG_STRING: { /* Symbols ToBoolean() coerce to true, regardless of their * description. This happens with no explicit check because * of the symbol representation byte prefix. */ duk_hstring *h = DUK_TVAL_GET_STRING(tv); DUK_ASSERT(h != NULL); return (DUK_HSTRING_GET_BYTELEN(h) > 0 ? 1 : 0); } case DUK_TAG_OBJECT: { return 1; } case DUK_TAG_BUFFER: { /* Mimic Uint8Array semantics: objects coerce true, regardless * of buffer length (zero or not) or context. */ return 1; } case DUK_TAG_POINTER: { void *p = DUK_TVAL_GET_POINTER(tv); return (p != NULL ? 1 : 0); } case DUK_TAG_LIGHTFUNC: { return 1; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: if (DUK_TVAL_GET_FASTINT(tv) != 0) { return 1; } else { return 0; } #endif default: { /* number */ duk_double_t d; #if defined(DUK_USE_PREFER_SIZE) int c; #endif DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv)); d = DUK_TVAL_GET_DOUBLE(tv); #if defined(DUK_USE_PREFER_SIZE) c = DUK_FPCLASSIFY((double) d); if (c == DUK_FP_ZERO || c == DUK_FP_NAN) { return 0; } else { return 1; } #else DUK_ASSERT(duk_double_is_nan_or_zero(d) == 0 || duk_double_is_nan_or_zero(d) == 1); return duk_double_is_nan_or_zero(d) ^ 1; #endif } } DUK_UNREACHABLE(); } /* * ToNumber() (E5 Section 9.3) * * Value to convert must be on stack top, and is popped before exit. * * See: http://www.cs.indiana.edu/~burger/FP-Printing-PLDI96.pdf * http://www.cs.indiana.edu/~burger/fp/index.html * * Notes on the conversion: * * - There are specific requirements on the accuracy of the conversion * through a "Mathematical Value" (MV), so this conversion is not * trivial. * * - Quick rejects (e.g. based on first char) are difficult because * the grammar allows leading and trailing white space. * * - Quick reject based on string length is difficult even after * accounting for white space; there may be arbitrarily many * decimal digits. * * - Standard grammar allows decimal values ("123"), hex values * ("0x123") and infinities * * - Unlike source code literals, ToNumber() coerces empty strings * and strings with only whitespace to zero (not NaN). However, * while '' coerces to 0, '+' and '-' coerce to NaN. */ /* E5 Section 9.3.1 */ DUK_LOCAL duk_double_t duk__tonumber_string_raw(duk_hthread *thr) { duk_small_uint_t s2n_flags; duk_double_t d; DUK_ASSERT(duk_is_string(thr, -1)); /* Quite lenient, e.g. allow empty as zero, but don't allow trailing * garbage. */ s2n_flags = DUK_S2N_FLAG_TRIM_WHITE | DUK_S2N_FLAG_ALLOW_EXP | DUK_S2N_FLAG_ALLOW_PLUS | DUK_S2N_FLAG_ALLOW_MINUS | DUK_S2N_FLAG_ALLOW_INF | DUK_S2N_FLAG_ALLOW_FRAC | DUK_S2N_FLAG_ALLOW_NAKED_FRAC | DUK_S2N_FLAG_ALLOW_EMPTY_FRAC | DUK_S2N_FLAG_ALLOW_EMPTY_AS_ZERO | DUK_S2N_FLAG_ALLOW_LEADING_ZERO | DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT | DUK_S2N_FLAG_ALLOW_AUTO_OCT_INT | DUK_S2N_FLAG_ALLOW_AUTO_BIN_INT; duk_numconv_parse(thr, 10 /*radix*/, s2n_flags); #if defined(DUK_USE_PREFER_SIZE) d = duk_get_number(thr, -1); duk_pop_unsafe(thr); #else thr->valstack_top--; DUK_ASSERT(DUK_TVAL_IS_NUMBER(thr->valstack_top)); DUK_ASSERT(DUK_TVAL_IS_DOUBLE(thr->valstack_top)); /* no fastint conversion in numconv now */ DUK_ASSERT(!DUK_TVAL_NEEDS_REFCOUNT_UPDATE(thr->valstack_top)); d = DUK_TVAL_GET_DOUBLE(thr->valstack_top); /* assumes not a fastint */ DUK_TVAL_SET_UNDEFINED(thr->valstack_top); #endif return d; } DUK_INTERNAL duk_double_t duk_js_tonumber(duk_hthread *thr, duk_tval *tv) { DUK_ASSERT(thr != NULL); DUK_ASSERT(tv != NULL); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_UNDEFINED: { /* return a specific NaN (although not strictly necessary) */ duk_double_union du; DUK_DBLUNION_SET_NAN(&du); DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du)); return du.d; } case DUK_TAG_NULL: { /* +0.0 */ return 0.0; } case DUK_TAG_BOOLEAN: { if (DUK_TVAL_IS_BOOLEAN_TRUE(tv)) { return 1.0; } return 0.0; } case DUK_TAG_STRING: { /* For Symbols ToNumber() is always a TypeError. */ duk_hstring *h = DUK_TVAL_GET_STRING(tv); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) { DUK_ERROR_TYPE(thr, DUK_STR_CANNOT_NUMBER_COERCE_SYMBOL); DUK_WO_NORETURN(return 0.0;); } duk_push_hstring(thr, h); return duk__tonumber_string_raw(thr); } case DUK_TAG_BUFFER: /* plain buffer treated like object */ case DUK_TAG_OBJECT: { duk_double_t d; duk_push_tval(thr, tv); duk_to_primitive(thr, -1, DUK_HINT_NUMBER); /* 'tv' becomes invalid */ /* recursive call for a primitive value (guaranteed not to cause second * recursion). */ DUK_ASSERT(duk_get_tval(thr, -1) != NULL); d = duk_js_tonumber(thr, duk_get_tval(thr, -1)); duk_pop_unsafe(thr); return d; } case DUK_TAG_POINTER: { /* Coerce like boolean */ void *p = DUK_TVAL_GET_POINTER(tv); return (p != NULL ? 1.0 : 0.0); } case DUK_TAG_LIGHTFUNC: { /* +(function(){}) -> NaN */ return DUK_DOUBLE_NAN; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: return (duk_double_t) DUK_TVAL_GET_FASTINT(tv); #endif default: { /* number */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv)); DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv)); return DUK_TVAL_GET_DOUBLE(tv); } } DUK_UNREACHABLE(); } /* * ToInteger() (E5 Section 9.4) */ /* exposed, used by e.g. duk_bi_date.c */ DUK_INTERNAL duk_double_t duk_js_tointeger_number(duk_double_t x) { #if defined(DUK_USE_PREFER_SIZE) duk_small_int_t c = (duk_small_int_t) DUK_FPCLASSIFY(x); if (DUK_UNLIKELY(c == DUK_FP_NAN)) { return 0.0; } else if (DUK_UNLIKELY(c == DUK_FP_INFINITE)) { return x; } else { /* Finite, including neg/pos zero. Neg zero sign must be * preserved. */ return duk_double_trunc_towards_zero(x); } #else /* DUK_USE_PREFER_SIZE */ /* NaN and Infinity have the same exponent so it's a cheap * initial check for the rare path. */ if (DUK_UNLIKELY(duk_double_is_nan_or_inf(x) != 0U)) { if (duk_double_is_nan(x)) { return 0.0; } else { return x; } } else { return duk_double_trunc_towards_zero(x); } #endif /* DUK_USE_PREFER_SIZE */ } DUK_INTERNAL duk_double_t duk_js_tointeger(duk_hthread *thr, duk_tval *tv) { /* XXX: fastint */ duk_double_t d = duk_js_tonumber(thr, tv); /* invalidates tv */ return duk_js_tointeger_number(d); } /* * ToInt32(), ToUint32(), ToUint16() (E5 Sections 9.5, 9.6, 9.7) */ /* combined algorithm matching E5 Sections 9.5 and 9.6 */ DUK_LOCAL duk_double_t duk__toint32_touint32_helper(duk_double_t x, duk_bool_t is_toint32) { #if defined (DUK_USE_PREFER_SIZE) duk_small_int_t c; #endif #if defined (DUK_USE_PREFER_SIZE) c = (duk_small_int_t) DUK_FPCLASSIFY(x); if (c == DUK_FP_NAN || c == DUK_FP_ZERO || c == DUK_FP_INFINITE) { return 0.0; } #else if (duk_double_is_nan_zero_inf(x)) { return 0.0; } #endif /* x = sign(x) * floor(abs(x)), i.e. truncate towards zero, keep sign */ x = duk_double_trunc_towards_zero(x); /* NOTE: fmod(x) result sign is same as sign of x, which * differs from what Javascript wants (see Section 9.6). */ x = DUK_FMOD(x, DUK_DOUBLE_2TO32); /* -> x in ]-2**32, 2**32[ */ if (x < 0.0) { x += DUK_DOUBLE_2TO32; } DUK_ASSERT(x >= 0 && x < DUK_DOUBLE_2TO32); /* -> x in [0, 2**32[ */ if (is_toint32) { if (x >= DUK_DOUBLE_2TO31) { /* x in [2**31, 2**32[ */ x -= DUK_DOUBLE_2TO32; /* -> x in [-2**31,2**31[ */ } } return x; } DUK_INTERNAL duk_int32_t duk_js_toint32(duk_hthread *thr, duk_tval *tv) { duk_double_t d; #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv)) { return DUK_TVAL_GET_FASTINT_I32(tv); } #endif d = duk_js_tonumber(thr, tv); /* invalidates tv */ d = duk__toint32_touint32_helper(d, 1); DUK_ASSERT(DUK_FPCLASSIFY(d) == DUK_FP_ZERO || DUK_FPCLASSIFY(d) == DUK_FP_NORMAL); DUK_ASSERT(d >= -2147483648.0 && d <= 2147483647.0); /* [-0x80000000,0x7fffffff] */ DUK_ASSERT(d == ((duk_double_t) ((duk_int32_t) d))); /* whole, won't clip */ return (duk_int32_t) d; } DUK_INTERNAL duk_uint32_t duk_js_touint32(duk_hthread *thr, duk_tval *tv) { duk_double_t d; #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv)) { return DUK_TVAL_GET_FASTINT_U32(tv); } #endif d = duk_js_tonumber(thr, tv); /* invalidates tv */ d = duk__toint32_touint32_helper(d, 0); DUK_ASSERT(DUK_FPCLASSIFY(d) == DUK_FP_ZERO || DUK_FPCLASSIFY(d) == DUK_FP_NORMAL); DUK_ASSERT(d >= 0.0 && d <= 4294967295.0); /* [0x00000000, 0xffffffff] */ DUK_ASSERT(d == ((duk_double_t) ((duk_uint32_t) d))); /* whole, won't clip */ return (duk_uint32_t) d; } DUK_INTERNAL duk_uint16_t duk_js_touint16(duk_hthread *thr, duk_tval *tv) { /* should be a safe way to compute this */ return (duk_uint16_t) (duk_js_touint32(thr, tv) & 0x0000ffffU); } /* * ToString() (E5 Section 9.8) * ToObject() (E5 Section 9.9) * CheckObjectCoercible() (E5 Section 9.10) * IsCallable() (E5 Section 9.11) * * ==> implemented in the API. */ /* * Loose equality, strict equality, and SameValue (E5 Sections 11.9.1, 11.9.4, * 9.12). These have much in common so they can share some helpers. * * Future work notes: * * - Current implementation (and spec definition) has recursion; this should * be fixed if possible. * * - String-to-number coercion should be possible without going through the * value stack (and be more compact) if a shared helper is invoked. */ /* Note that this is the same operation for strict and loose equality: * - E5 Section 11.9.3, step 1.c (loose) * - E5 Section 11.9.6, step 4 (strict) */ DUK_LOCAL duk_bool_t duk__js_equals_number(duk_double_t x, duk_double_t y) { #if defined(DUK_USE_PARANOID_MATH) /* Straightforward algorithm, makes fewer compiler assumptions. */ duk_small_int_t cx = (duk_small_int_t) DUK_FPCLASSIFY(x); duk_small_int_t cy = (duk_small_int_t) DUK_FPCLASSIFY(y); if (cx == DUK_FP_NAN || cy == DUK_FP_NAN) { return 0; } if (cx == DUK_FP_ZERO && cy == DUK_FP_ZERO) { return 1; } if (x == y) { return 1; } return 0; #else /* DUK_USE_PARANOID_MATH */ /* Better equivalent algorithm. If the compiler is compliant, C and * ECMAScript semantics are identical for this particular comparison. * In particular, NaNs must never compare equal and zeroes must compare * equal regardless of sign. Could also use a macro, but this inlines * already nicely (no difference on gcc, for instance). */ if (x == y) { /* IEEE requires that NaNs compare false */ DUK_ASSERT(DUK_FPCLASSIFY(x) != DUK_FP_NAN); DUK_ASSERT(DUK_FPCLASSIFY(y) != DUK_FP_NAN); return 1; } else { /* IEEE requires that zeros compare the same regardless * of their signed, so if both x and y are zeroes, they * are caught above. */ DUK_ASSERT(!(DUK_FPCLASSIFY(x) == DUK_FP_ZERO && DUK_FPCLASSIFY(y) == DUK_FP_ZERO)); return 0; } #endif /* DUK_USE_PARANOID_MATH */ } DUK_LOCAL duk_bool_t duk__js_samevalue_number(duk_double_t x, duk_double_t y) { #if defined(DUK_USE_PARANOID_MATH) duk_small_int_t cx = (duk_small_int_t) DUK_FPCLASSIFY(x); duk_small_int_t cy = (duk_small_int_t) DUK_FPCLASSIFY(y); if (cx == DUK_FP_NAN && cy == DUK_FP_NAN) { /* SameValue(NaN, NaN) = true, regardless of NaN sign or extra bits */ return 1; } if (cx == DUK_FP_ZERO && cy == DUK_FP_ZERO) { /* Note: cannot assume that a non-zero return value of signbit() would * always be the same -- hence cannot (portably) use something like: * * signbit(x) == signbit(y) */ duk_small_int_t sx = DUK_SIGNBIT(x) ? 1 : 0; duk_small_int_t sy = DUK_SIGNBIT(y) ? 1 : 0; return (sx == sy); } /* normal comparison; known: * - both x and y are not NaNs (but one of them can be) * - both x and y are not zero (but one of them can be) * - x and y may be denormal or infinite */ return (x == y); #else /* DUK_USE_PARANOID_MATH */ duk_small_int_t cx = (duk_small_int_t) DUK_FPCLASSIFY(x); duk_small_int_t cy = (duk_small_int_t) DUK_FPCLASSIFY(y); if (x == y) { /* IEEE requires that NaNs compare false */ DUK_ASSERT(DUK_FPCLASSIFY(x) != DUK_FP_NAN); DUK_ASSERT(DUK_FPCLASSIFY(y) != DUK_FP_NAN); /* Using classification has smaller footprint than direct comparison. */ if (DUK_UNLIKELY(cx == DUK_FP_ZERO && cy == DUK_FP_ZERO)) { /* Note: cannot assume that a non-zero return value of signbit() would * always be the same -- hence cannot (portably) use something like: * * signbit(x) == signbit(y) */ return duk_double_same_sign(x, y); } return 1; } else { /* IEEE requires that zeros compare the same regardless * of their sign, so if both x and y are zeroes, they * are caught above. */ DUK_ASSERT(!(DUK_FPCLASSIFY(x) == DUK_FP_ZERO && DUK_FPCLASSIFY(y) == DUK_FP_ZERO)); /* Difference to non-strict/strict comparison is that NaNs compare * equal and signed zero signs matter. */ if (DUK_UNLIKELY(cx == DUK_FP_NAN && cy == DUK_FP_NAN)) { /* SameValue(NaN, NaN) = true, regardless of NaN sign or extra bits */ return 1; } return 0; } #endif /* DUK_USE_PARANOID_MATH */ } DUK_INTERNAL duk_bool_t duk_js_equals_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_uint_t flags) { duk_uint_t type_mask_x; duk_uint_t type_mask_y; /* If flags != 0 (strict or SameValue), thr can be NULL. For loose * equals comparison it must be != NULL. */ DUK_ASSERT(flags != 0 || thr != NULL); /* * Same type? * * Note: since number values have no explicit tag in the 8-byte * representation, need the awkward if + switch. */ #if defined(DUK_USE_FASTINT) if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) { if (DUK_TVAL_GET_FASTINT(tv_x) == DUK_TVAL_GET_FASTINT(tv_y)) { return 1; } else { return 0; } } else #endif if (DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y)) { duk_double_t d1, d2; /* Catches both doubles and cases where only one argument is * a fastint so can't assume a double. */ d1 = DUK_TVAL_GET_NUMBER(tv_x); d2 = DUK_TVAL_GET_NUMBER(tv_y); if (DUK_UNLIKELY((flags & DUK_EQUALS_FLAG_SAMEVALUE) != 0)) { /* SameValue */ return duk__js_samevalue_number(d1, d2); } else { /* equals and strict equals */ return duk__js_equals_number(d1, d2); } } else if (DUK_TVAL_GET_TAG(tv_x) == DUK_TVAL_GET_TAG(tv_y)) { switch (DUK_TVAL_GET_TAG(tv_x)) { case DUK_TAG_UNDEFINED: case DUK_TAG_NULL: { return 1; } case DUK_TAG_BOOLEAN: { return DUK_TVAL_GET_BOOLEAN(tv_x) == DUK_TVAL_GET_BOOLEAN(tv_y); } case DUK_TAG_POINTER: { return DUK_TVAL_GET_POINTER(tv_x) == DUK_TVAL_GET_POINTER(tv_y); } case DUK_TAG_STRING: case DUK_TAG_OBJECT: { /* Heap pointer comparison suffices for strings and objects. * Symbols compare equal if they have the same internal * representation; again heap pointer comparison suffices. */ return DUK_TVAL_GET_HEAPHDR(tv_x) == DUK_TVAL_GET_HEAPHDR(tv_y); } case DUK_TAG_BUFFER: { /* In Duktape 2.x plain buffers mimic Uint8Array objects * so always compare by heap pointer. In Duktape 1.x * strict comparison would compare heap pointers and * non-strict would compare contents. */ return DUK_TVAL_GET_HEAPHDR(tv_x) == DUK_TVAL_GET_HEAPHDR(tv_y); } case DUK_TAG_LIGHTFUNC: { /* At least 'magic' has a significant impact on function * identity. */ duk_small_uint_t lf_flags_x; duk_small_uint_t lf_flags_y; duk_c_function func_x; duk_c_function func_y; DUK_TVAL_GET_LIGHTFUNC(tv_x, func_x, lf_flags_x); DUK_TVAL_GET_LIGHTFUNC(tv_y, func_y, lf_flags_y); return ((func_x == func_y) && (lf_flags_x == lf_flags_y)) ? 1 : 0; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: { DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_x)); DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_y)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_x)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_y)); DUK_UNREACHABLE(); return 0; } } } if ((flags & (DUK_EQUALS_FLAG_STRICT | DUK_EQUALS_FLAG_SAMEVALUE)) != 0) { return 0; } DUK_ASSERT(flags == 0); /* non-strict equality from here on */ /* * Types are different; various cases for non-strict comparison * * Since comparison is symmetric, we use a "swap trick" to reduce * code size. */ type_mask_x = duk_get_type_mask_tval(tv_x); type_mask_y = duk_get_type_mask_tval(tv_y); /* Undefined/null are considered equal (e.g. "null == undefined" -> true). */ if ((type_mask_x & (DUK_TYPE_MASK_UNDEFINED | DUK_TYPE_MASK_NULL)) && (type_mask_y & (DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_UNDEFINED))) { return 1; } /* Number/string -> coerce string to number (e.g. "'1.5' == 1.5" -> true). */ if ((type_mask_x & DUK_TYPE_MASK_NUMBER) && (type_mask_y & DUK_TYPE_MASK_STRING)) { if (!DUK_TVAL_STRING_IS_SYMBOL(tv_y)) { duk_double_t d1, d2; d1 = DUK_TVAL_GET_NUMBER(tv_x); d2 = duk_to_number_tval(thr, tv_y); return duk__js_equals_number(d1, d2); } } if ((type_mask_x & DUK_TYPE_MASK_STRING) && (type_mask_y & DUK_TYPE_MASK_NUMBER)) { if (!DUK_TVAL_STRING_IS_SYMBOL(tv_x)) { duk_double_t d1, d2; d1 = DUK_TVAL_GET_NUMBER(tv_y); d2 = duk_to_number_tval(thr, tv_x); return duk__js_equals_number(d1, d2); } } /* Boolean/any -> coerce boolean to number and try again. If boolean is * compared to a pointer, the final comparison after coercion now always * yields false (as pointer vs. number compares to false), but this is * not special cased. * * ToNumber(bool) is +1.0 or 0.0. Tagged boolean value is always 0 or 1. */ if (type_mask_x & DUK_TYPE_MASK_BOOLEAN) { DUK_ASSERT(DUK_TVAL_GET_BOOLEAN(tv_x) == 0 || DUK_TVAL_GET_BOOLEAN(tv_x) == 1); duk_push_uint(thr, DUK_TVAL_GET_BOOLEAN(tv_x)); duk_push_tval(thr, tv_y); goto recursive_call; } if (type_mask_y & DUK_TYPE_MASK_BOOLEAN) { DUK_ASSERT(DUK_TVAL_GET_BOOLEAN(tv_y) == 0 || DUK_TVAL_GET_BOOLEAN(tv_y) == 1); duk_push_tval(thr, tv_x); duk_push_uint(thr, DUK_TVAL_GET_BOOLEAN(tv_y)); goto recursive_call; } /* String-number-symbol/object -> coerce object to primitive (apparently without hint), then try again. */ if ((type_mask_x & (DUK_TYPE_MASK_STRING | DUK_TYPE_MASK_NUMBER)) && (type_mask_y & DUK_TYPE_MASK_OBJECT)) { /* No symbol check needed because symbols and strings are accepted. */ duk_push_tval(thr, tv_x); duk_push_tval(thr, tv_y); duk_to_primitive(thr, -1, DUK_HINT_NONE); /* apparently no hint? */ goto recursive_call; } if ((type_mask_x & DUK_TYPE_MASK_OBJECT) && (type_mask_y & (DUK_TYPE_MASK_STRING | DUK_TYPE_MASK_NUMBER))) { /* No symbol check needed because symbols and strings are accepted. */ duk_push_tval(thr, tv_x); duk_push_tval(thr, tv_y); duk_to_primitive(thr, -2, DUK_HINT_NONE); /* apparently no hint? */ goto recursive_call; } /* Nothing worked -> not equal. */ return 0; recursive_call: /* Shared code path to call the helper again with arguments on stack top. */ { duk_bool_t rc; rc = duk_js_equals_helper(thr, DUK_GET_TVAL_NEGIDX(thr, -2), DUK_GET_TVAL_NEGIDX(thr, -1), 0 /*flags:nonstrict*/); duk_pop_2_unsafe(thr); return rc; } } /* * Comparisons (x >= y, x > y, x <= y, x < y) * * E5 Section 11.8.5: implement 'x < y' and then use negate and eval_left_first * flags to get the rest. */ /* XXX: this should probably just operate on the stack top, because it * needs to push stuff on the stack anyway... */ DUK_INTERNAL duk_small_int_t duk_js_data_compare(const duk_uint8_t *buf1, const duk_uint8_t *buf2, duk_size_t len1, duk_size_t len2) { duk_size_t prefix_len; duk_small_int_t rc; prefix_len = (len1 <= len2 ? len1 : len2); /* duk_memcmp() is guaranteed to return zero (equal) for zero length * inputs. */ rc = duk_memcmp_unsafe((const void *) buf1, (const void *) buf2, (size_t) prefix_len); if (rc < 0) { return -1; } else if (rc > 0) { return 1; } /* prefix matches, lengths matter now */ if (len1 < len2) { /* e.g. "x" < "xx" */ return -1; } else if (len1 > len2) { return 1; } return 0; } DUK_INTERNAL duk_small_int_t duk_js_string_compare(duk_hstring *h1, duk_hstring *h2) { /* * String comparison (E5 Section 11.8.5, step 4), which * needs to compare codepoint by codepoint. * * However, UTF-8 allows us to use strcmp directly: the shared * prefix will be encoded identically (UTF-8 has unique encoding) * and the first differing character can be compared with a simple * unsigned byte comparison (which strcmp does). * * This will not work properly for non-xutf-8 strings, but this * is not an issue for compliance. */ DUK_ASSERT(h1 != NULL); DUK_ASSERT(h2 != NULL); return duk_js_data_compare((const duk_uint8_t *) DUK_HSTRING_GET_DATA(h1), (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h2), (duk_size_t) DUK_HSTRING_GET_BYTELEN(h1), (duk_size_t) DUK_HSTRING_GET_BYTELEN(h2)); } #if 0 /* unused */ DUK_INTERNAL duk_small_int_t duk_js_buffer_compare(duk_heap *heap, duk_hbuffer *h1, duk_hbuffer *h2) { /* Similar to String comparison. */ DUK_ASSERT(h1 != NULL); DUK_ASSERT(h2 != NULL); DUK_UNREF(heap); return duk_js_data_compare((const duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(heap, h1), (const duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(heap, h2), (duk_size_t) DUK_HBUFFER_GET_SIZE(h1), (duk_size_t) DUK_HBUFFER_GET_SIZE(h2)); } #endif #if defined(DUK_USE_FASTINT) DUK_LOCAL duk_bool_t duk__compare_fastint(duk_bool_t retval, duk_int64_t v1, duk_int64_t v2) { DUK_ASSERT(retval == 0 || retval == 1); if (v1 < v2) { return retval ^ 1; } else { return retval; } } #endif #if defined(DUK_USE_PARANOID_MATH) DUK_LOCAL duk_bool_t duk__compare_number(duk_bool_t retval, duk_double_t d1, duk_double_t d2) { duk_small_int_t c1, s1, c2, s2; DUK_ASSERT(retval == 0 || retval == 1); c1 = (duk_small_int_t) DUK_FPCLASSIFY(d1); s1 = (duk_small_int_t) DUK_SIGNBIT(d1); c2 = (duk_small_int_t) DUK_FPCLASSIFY(d2); s2 = (duk_small_int_t) DUK_SIGNBIT(d2); if (c1 == DUK_FP_NAN || c2 == DUK_FP_NAN) { return 0; /* Always false, regardless of negation. */ } if (c1 == DUK_FP_ZERO && c2 == DUK_FP_ZERO) { /* For all combinations: +0 < +0, +0 < -0, -0 < +0, -0 < -0, * steps e, f, and g. */ return retval; /* false */ } if (d1 == d2) { return retval; /* false */ } if (c1 == DUK_FP_INFINITE && s1 == 0) { /* x == +Infinity */ return retval; /* false */ } if (c2 == DUK_FP_INFINITE && s2 == 0) { /* y == +Infinity */ return retval ^ 1; /* true */ } if (c2 == DUK_FP_INFINITE && s2 != 0) { /* y == -Infinity */ return retval; /* false */ } if (c1 == DUK_FP_INFINITE && s1 != 0) { /* x == -Infinity */ return retval ^ 1; /* true */ } if (d1 < d2) { return retval ^ 1; /* true */ } return retval; /* false */ } #else /* DUK_USE_PARANOID_MATH */ DUK_LOCAL duk_bool_t duk__compare_number(duk_bool_t retval, duk_double_t d1, duk_double_t d2) { /* This comparison tree relies doesn't match the exact steps in * E5 Section 11.8.5 but should produce the same results. The * steps rely on exact IEEE semantics for NaNs, etc. */ DUK_ASSERT(retval == 0 || retval == 1); if (d1 < d2) { /* In no case should both (d1 < d2) and (d2 < d1) be true. * It's possible that neither is true though, and that's * handled below. */ DUK_ASSERT(!(d2 < d1)); /* - d1 < d2, both d1/d2 are normals (not Infinity, not NaN) * - d2 is +Infinity, d1 != +Infinity and NaN * - d1 is -Infinity, d2 != -Infinity and NaN */ return retval ^ 1; } else { if (d2 < d1) { /* - !(d1 < d2), both d1/d2 are normals (not Infinity, not NaN) * - d1 is +Infinity, d2 != +Infinity and NaN * - d2 is -Infinity, d1 != -Infinity and NaN */ return retval; } else { /* - d1 and/or d2 is NaN * - d1 and d2 are both +/- 0 * - d1 == d2 (including infinities) */ if (duk_double_is_nan(d1) || duk_double_is_nan(d2)) { /* Note: undefined from Section 11.8.5 always * results in false return (see e.g. Section * 11.8.3) - hence special treatment here. */ return 0; /* zero regardless of negation */ } else { return retval; } } } } #endif /* DUK_USE_PARANOID_MATH */ DUK_INTERNAL duk_bool_t duk_js_compare_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_uint_t flags) { duk_double_t d1, d2; duk_small_int_t rc; duk_bool_t retval; DUK_ASSERT(DUK_COMPARE_FLAG_NEGATE == 1); /* Rely on this flag being lowest. */ retval = flags & DUK_COMPARE_FLAG_NEGATE; DUK_ASSERT(retval == 0 || retval == 1); /* Fast path for fastints */ #if defined(DUK_USE_FASTINT) if (DUK_LIKELY(DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y))) { return duk__compare_fastint(retval, DUK_TVAL_GET_FASTINT(tv_x), DUK_TVAL_GET_FASTINT(tv_y)); } #endif /* DUK_USE_FASTINT */ /* Fast path for numbers (one of which may be a fastint) */ #if !defined(DUK_USE_PREFER_SIZE) if (DUK_LIKELY(DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y))) { return duk__compare_number(retval, DUK_TVAL_GET_NUMBER(tv_x), DUK_TVAL_GET_NUMBER(tv_y)); } #endif /* Slow path */ duk_push_tval(thr, tv_x); duk_push_tval(thr, tv_y); if (flags & DUK_COMPARE_FLAG_EVAL_LEFT_FIRST) { duk_to_primitive(thr, -2, DUK_HINT_NUMBER); duk_to_primitive(thr, -1, DUK_HINT_NUMBER); } else { duk_to_primitive(thr, -1, DUK_HINT_NUMBER); duk_to_primitive(thr, -2, DUK_HINT_NUMBER); } /* Note: reuse variables */ tv_x = DUK_GET_TVAL_NEGIDX(thr, -2); tv_y = DUK_GET_TVAL_NEGIDX(thr, -1); if (DUK_TVAL_IS_STRING(tv_x) && DUK_TVAL_IS_STRING(tv_y)) { duk_hstring *h1 = DUK_TVAL_GET_STRING(tv_x); duk_hstring *h2 = DUK_TVAL_GET_STRING(tv_y); DUK_ASSERT(h1 != NULL); DUK_ASSERT(h2 != NULL); if (DUK_LIKELY(!DUK_HSTRING_HAS_SYMBOL(h1) && !DUK_HSTRING_HAS_SYMBOL(h2))) { rc = duk_js_string_compare(h1, h2); duk_pop_2_unsafe(thr); if (rc < 0) { return retval ^ 1; } else { return retval; } } /* One or both are Symbols: fall through to handle in the * generic path. Concretely, ToNumber() will fail. */ } /* Ordering should not matter (E5 Section 11.8.5, step 3.a). */ #if 0 if (flags & DUK_COMPARE_FLAG_EVAL_LEFT_FIRST) { d1 = duk_to_number_m2(thr); d2 = duk_to_number_m1(thr); } else { d2 = duk_to_number_m1(thr); d1 = duk_to_number_m2(thr); } #endif d1 = duk_to_number_m2(thr); d2 = duk_to_number_m1(thr); /* We want to duk_pop_2_unsafe(thr); because the values are numbers * no decref check is needed. */ #if defined(DUK_USE_PREFER_SIZE) duk_pop_2_nodecref_unsafe(thr); #else DUK_ASSERT(!DUK_TVAL_NEEDS_REFCOUNT_UPDATE(duk_get_tval(thr, -2))); DUK_ASSERT(!DUK_TVAL_NEEDS_REFCOUNT_UPDATE(duk_get_tval(thr, -1))); DUK_ASSERT(duk_get_top(thr) >= 2); thr->valstack_top -= 2; tv_x = thr->valstack_top; tv_y = tv_x + 1; DUK_TVAL_SET_UNDEFINED(tv_x); /* Value stack policy */ DUK_TVAL_SET_UNDEFINED(tv_y); #endif return duk__compare_number(retval, d1, d2); } /* * instanceof */ /* * ES2015 Section 7.3.19 describes the OrdinaryHasInstance() algorithm * which covers both bound and non-bound functions; in effect the algorithm * includes E5 Sections 11.8.6, 15.3.5.3, and 15.3.4.5.3. * * ES2015 Section 12.9.4 describes the instanceof operator which first * checks @@hasInstance well-known symbol and falls back to * OrdinaryHasInstance(). * * Limited Proxy support: don't support 'getPrototypeOf' trap but * continue lookup in Proxy target if the value is a Proxy. */ DUK_LOCAL duk_bool_t duk__js_instanceof_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_bool_t skip_sym_check) { duk_hobject *func; duk_hobject *val; duk_hobject *proto; duk_tval *tv; duk_bool_t skip_first; duk_uint_t sanity; /* * Get the values onto the stack first. It would be possible to cover * some normal cases without resorting to the value stack. * * The right hand side could be a light function (as they generally * behave like objects). Light functions never have a 'prototype' * property so E5.1 Section 15.3.5.3 step 3 always throws a TypeError. * Using duk_require_hobject() is thus correct (except for error msg). */ duk_push_tval(thr, tv_x); duk_push_tval(thr, tv_y); func = duk_require_hobject(thr, -1); DUK_ASSERT(func != NULL); #if defined(DUK_USE_SYMBOL_BUILTIN) /* * @@hasInstance check, ES2015 Section 12.9.4, Steps 2-4. */ if (!skip_sym_check) { if (duk_get_method_stridx(thr, -1, DUK_STRIDX_WELLKNOWN_SYMBOL_HAS_INSTANCE)) { /* [ ... lhs rhs func ] */ duk_insert(thr, -3); /* -> [ ... func lhs rhs ] */ duk_swap_top(thr, -2); /* -> [ ... func rhs(this) lhs ] */ duk_call_method(thr, 1); return duk_to_boolean_top_pop(thr); } } #else DUK_UNREF(skip_sym_check); #endif /* * For bound objects, [[HasInstance]] just calls the target function * [[HasInstance]]. If that is again a bound object, repeat until * we find a non-bound Function object. * * The bound function chain is now "collapsed" so there can be only * one bound function in the chain. */ if (!DUK_HOBJECT_IS_CALLABLE(func)) { /* * Note: of native ECMAScript objects, only Function instances * have a [[HasInstance]] internal property. Custom objects might * also have it, but not in current implementation. * * XXX: add a separate flag, DUK_HOBJECT_FLAG_ALLOW_INSTANCEOF? */ goto error_invalid_rval; } if (DUK_HOBJECT_HAS_BOUNDFUNC(func)) { duk_push_tval(thr, &((duk_hboundfunc *) (void *) func)->target); duk_replace(thr, -2); func = duk_require_hobject(thr, -1); /* lightfunc throws */ /* Rely on Function.prototype.bind() never creating bound * functions whose target is not proper. */ DUK_ASSERT(func != NULL); DUK_ASSERT(DUK_HOBJECT_IS_CALLABLE(func)); } /* * 'func' is now a non-bound object which supports [[HasInstance]] * (which here just means DUK_HOBJECT_FLAG_CALLABLE). Move on * to execute E5 Section 15.3.5.3. */ DUK_ASSERT(func != NULL); DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(func)); DUK_ASSERT(DUK_HOBJECT_IS_CALLABLE(func)); /* [ ... lval rval(func) ] */ /* For lightfuncs, buffers, and pointers start the comparison directly * from the virtual prototype object. */ skip_first = 0; tv = DUK_GET_TVAL_NEGIDX(thr, -2); switch (DUK_TVAL_GET_TAG(tv)) { case DUK_TAG_LIGHTFUNC: val = thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]; DUK_ASSERT(val != NULL); break; case DUK_TAG_BUFFER: val = thr->builtins[DUK_BIDX_UINT8ARRAY_PROTOTYPE]; DUK_ASSERT(val != NULL); break; case DUK_TAG_POINTER: val = thr->builtins[DUK_BIDX_POINTER_PROTOTYPE]; DUK_ASSERT(val != NULL); break; case DUK_TAG_OBJECT: skip_first = 1; /* Ignore object itself on first round. */ val = DUK_TVAL_GET_OBJECT(tv); DUK_ASSERT(val != NULL); break; default: goto pop2_and_false; } DUK_ASSERT(val != NULL); /* Loop doesn't actually rely on this. */ /* Look up .prototype of rval. Leave it on the value stack in case it * has been virtualized (e.g. getter, Proxy trap). */ duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_PROTOTYPE); /* -> [ ... lval rval rval.prototype ] */ #if defined(DUK_USE_VERBOSE_ERRORS) proto = duk_get_hobject(thr, -1); if (proto == NULL) { goto error_invalid_rval_noproto; } #else proto = duk_require_hobject(thr, -1); #endif sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY; do { /* * Note: prototype chain is followed BEFORE first comparison. This * means that the instanceof lval is never itself compared to the * rval.prototype property. This is apparently intentional, see E5 * Section 15.3.5.3, step 4.a. * * Also note: * * js> (function() {}) instanceof Function * true * js> Function instanceof Function * true * * For the latter, h_proto will be Function.prototype, which is the * built-in Function prototype. Because Function.[[Prototype]] is * also the built-in Function prototype, the result is true. */ if (!val) { goto pop3_and_false; } DUK_ASSERT(val != NULL); #if defined(DUK_USE_ES6_PROXY) val = duk_hobject_resolve_proxy_target(val); #endif if (skip_first) { skip_first = 0; } else if (val == proto) { goto pop3_and_true; } DUK_ASSERT(val != NULL); val = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, val); } while (--sanity > 0); if (DUK_UNLIKELY(sanity == 0)) { DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT); DUK_WO_NORETURN(return 0;); } DUK_UNREACHABLE(); pop2_and_false: duk_pop_2_unsafe(thr); return 0; pop3_and_false: duk_pop_3_unsafe(thr); return 0; pop3_and_true: duk_pop_3_unsafe(thr); return 1; error_invalid_rval: DUK_ERROR_TYPE(thr, DUK_STR_INVALID_INSTANCEOF_RVAL); DUK_WO_NORETURN(return 0;); #if defined(DUK_USE_VERBOSE_ERRORS) error_invalid_rval_noproto: DUK_ERROR_TYPE(thr, DUK_STR_INVALID_INSTANCEOF_RVAL_NOPROTO); DUK_WO_NORETURN(return 0;); #endif } #if defined(DUK_USE_SYMBOL_BUILTIN) DUK_INTERNAL duk_bool_t duk_js_instanceof_ordinary(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y) { return duk__js_instanceof_helper(thr, tv_x, tv_y, 1 /*skip_sym_check*/); } #endif DUK_INTERNAL duk_bool_t duk_js_instanceof(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y) { return duk__js_instanceof_helper(thr, tv_x, tv_y, 0 /*skip_sym_check*/); } /* * in */ /* * E5 Sections 11.8.7, 8.12.6. * * Basically just a property existence check using [[HasProperty]]. */ DUK_INTERNAL duk_bool_t duk_js_in(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y) { duk_bool_t retval; /* * Get the values onto the stack first. It would be possible to cover * some normal cases without resorting to the value stack (e.g. if * lval is already a string). */ /* XXX: The ES5/5.1/6 specifications require that the key in 'key in obj' * must be string coerced before the internal HasProperty() algorithm is * invoked. A fast path skipping coercion could be safely implemented for * numbers (as number-to-string coercion has no side effects). For ES2015 * proxy behavior, the trap 'key' argument must be in a string coerced * form (which is a shame). */ /* TypeError if rval is not an object or object like (e.g. lightfunc * or plain buffer). */ duk_push_tval(thr, tv_x); duk_push_tval(thr, tv_y); duk_require_type_mask(thr, -1, DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER); (void) duk_to_property_key_hstring(thr, -2); retval = duk_hobject_hasprop(thr, DUK_GET_TVAL_NEGIDX(thr, -1), DUK_GET_TVAL_NEGIDX(thr, -2)); duk_pop_2_unsafe(thr); return retval; } /* * typeof * * E5 Section 11.4.3. * * Very straightforward. The only question is what to return for our * non-standard tag / object types. * * There is an unfortunate string constant define naming problem with * typeof return values for e.g. "Object" and "object"; careful with * the built-in string defines. The LC_XXX defines are used for the * lowercase variants now. */ DUK_INTERNAL duk_small_uint_t duk_js_typeof_stridx(duk_tval *tv_x) { duk_small_uint_t stridx = 0; switch (DUK_TVAL_GET_TAG(tv_x)) { case DUK_TAG_UNDEFINED: { stridx = DUK_STRIDX_LC_UNDEFINED; break; } case DUK_TAG_NULL: { /* Note: not a typo, "object" is returned for a null value. */ stridx = DUK_STRIDX_LC_OBJECT; break; } case DUK_TAG_BOOLEAN: { stridx = DUK_STRIDX_LC_BOOLEAN; break; } case DUK_TAG_POINTER: { /* Implementation specific. */ stridx = DUK_STRIDX_LC_POINTER; break; } case DUK_TAG_STRING: { duk_hstring *str; /* All internal keys are identified as Symbols. */ str = DUK_TVAL_GET_STRING(tv_x); DUK_ASSERT(str != NULL); if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(str))) { stridx = DUK_STRIDX_LC_SYMBOL; } else { stridx = DUK_STRIDX_LC_STRING; } break; } case DUK_TAG_OBJECT: { duk_hobject *obj = DUK_TVAL_GET_OBJECT(tv_x); DUK_ASSERT(obj != NULL); if (DUK_HOBJECT_IS_CALLABLE(obj)) { stridx = DUK_STRIDX_LC_FUNCTION; } else { stridx = DUK_STRIDX_LC_OBJECT; } break; } case DUK_TAG_BUFFER: { /* Implementation specific. In Duktape 1.x this would be * 'buffer', in Duktape 2.x changed to 'object' because plain * buffers now mimic Uint8Array objects. */ stridx = DUK_STRIDX_LC_OBJECT; break; } case DUK_TAG_LIGHTFUNC: { stridx = DUK_STRIDX_LC_FUNCTION; break; } #if defined(DUK_USE_FASTINT) case DUK_TAG_FASTINT: #endif default: { /* number */ DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_x)); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_x)); stridx = DUK_STRIDX_LC_NUMBER; break; } } DUK_ASSERT_STRIDX_VALID(stridx); return stridx; } /* * Array index and length * * Array index: E5 Section 15.4 * Array length: E5 Section 15.4.5.1 steps 3.c - 3.d (array length write) */ /* Compure array index from string context, or return a "not array index" * indicator. */ DUK_INTERNAL duk_uarridx_t duk_js_to_arrayindex_string(const duk_uint8_t *str, duk_uint32_t blen) { duk_uarridx_t res; /* Only strings with byte length 1-10 can be 32-bit array indices. * Leading zeroes (except '0' alone), plus/minus signs are not allowed. * We could do a lot of prechecks here, but since most strings won't * start with any digits, it's simpler to just parse the number and * fail quickly. */ res = 0; if (blen == 0) { goto parse_fail; } do { duk_uarridx_t dig; dig = (duk_uarridx_t) (*str++) - DUK_ASC_0; if (dig <= 9U) { /* Careful overflow handling. When multiplying by 10: * - 0x19999998 x 10 = 0xfffffff0: no overflow, and adding * 0...9 is safe. * - 0x19999999 x 10 = 0xfffffffa: no overflow, adding * 0...5 is safe, 6...9 overflows. * - 0x1999999a x 10 = 0x100000004: always overflow. */ if (DUK_UNLIKELY(res >= 0x19999999UL)) { if (res >= 0x1999999aUL) { /* Always overflow. */ goto parse_fail; } DUK_ASSERT(res == 0x19999999UL); if (dig >= 6U) { goto parse_fail; } res = 0xfffffffaUL + dig; DUK_ASSERT(res >= 0xfffffffaUL); DUK_ASSERT_DISABLE(res <= 0xffffffffUL); /* range */ } else { res = res * 10U + dig; if (DUK_UNLIKELY(res == 0)) { /* If 'res' is 0, previous 'res' must * have been 0 and we scanned in a zero. * This is only allowed if blen == 1, * i.e. the exact string '0'. */ if (blen == (duk_uint32_t) 1) { return 0; } goto parse_fail; } } } else { /* Because 'dig' is unsigned, catches both values * above '9' and below '0'. */ goto parse_fail; } } while (--blen > 0); return res; parse_fail: return DUK_HSTRING_NO_ARRAY_INDEX; } #if !defined(DUK_USE_HSTRING_ARRIDX) /* Get array index for a string which is known to be an array index. This helper * is needed when duk_hstring doesn't concretely store the array index, but strings * are flagged as array indices at intern time. */ DUK_INTERNAL duk_uarridx_t duk_js_to_arrayindex_hstring_fast_known(duk_hstring *h) { const duk_uint8_t *p; duk_uarridx_t res; duk_uint8_t t; DUK_ASSERT(h != NULL); DUK_ASSERT(DUK_HSTRING_HAS_ARRIDX(h)); p = DUK_HSTRING_GET_DATA(h); res = 0; for (;;) { t = *p++; if (DUK_UNLIKELY(t == 0)) { /* Scanning to NUL is always safe for interned strings. */ break; } DUK_ASSERT(t >= (duk_uint8_t) DUK_ASC_0 && t <= (duk_uint8_t) DUK_ASC_9); res = res * 10U + (duk_uarridx_t) t - (duk_uarridx_t) DUK_ASC_0; } return res; } DUK_INTERNAL duk_uarridx_t duk_js_to_arrayindex_hstring_fast(duk_hstring *h) { DUK_ASSERT(h != NULL); if (!DUK_HSTRING_HAS_ARRIDX(h)) { return DUK_HSTRING_NO_ARRAY_INDEX; } return duk_js_to_arrayindex_hstring_fast_known(h); } #endif /* DUK_USE_HSTRING_ARRIDX */ /* * Identifier access and function closure handling. * * Provides the primitives for slow path identifier accesses: GETVAR, * PUTVAR, DELVAR, etc. The fast path, direct register accesses, should * be used for most identifier accesses. Consequently, these slow path * primitives should be optimized for maximum compactness. * * ECMAScript environment records (declarative and object) are represented * as internal objects with control keys. Environment records have a * parent record ("outer environment reference") which is represented by * the implicit prototype for technical reasons (in other words, it is a * convenient field). The prototype chain is not followed in the ordinary * sense for variable lookups. * * See identifier-handling.rst for more details on the identifier algorithms * and the internal representation. See function-objects.rst for details on * what function templates and instances are expected to look like. * * Care must be taken to avoid duk_tval pointer invalidation caused by * e.g. value stack or object resizing. * * TODO: properties for function instances could be initialized much more * efficiently by creating a property allocation for a certain size and * filling in keys and values directly (and INCREFing both with "bulk incref" * primitives. * * XXX: duk_hobject_getprop() and duk_hobject_putprop() calls are a bit * awkward (especially because they follow the prototype chain); rework * if "raw" own property helpers are added. */ /* #include duk_internal.h -> already included */ /* * Local result type for duk__get_identifier_reference() lookup. */ typedef struct { duk_hobject *env; duk_hobject *holder; /* for object-bound identifiers */ duk_tval *value; /* for register-bound and declarative env identifiers */ duk_uint_t attrs; /* property attributes for identifier (relevant if value != NULL) */ duk_bool_t has_this; /* for object-bound identifiers: provide 'this' binding */ } duk__id_lookup_result; /* * Create a new function object based on a "template function" which contains * compiled bytecode, constants, etc, but lacks a lexical environment. * * ECMAScript requires that each created closure is a separate object, with * its own set of editable properties. However, structured property values * (such as the formal arguments list and the variable map) are shared. * Also the bytecode, constants, and inner functions are shared. * * See E5 Section 13.2 for detailed requirements on the function objects; * there are no similar requirements for function "templates" which are an * implementation dependent internal feature. Also see function-objects.rst * for a discussion on the function instance properties provided by this * implementation. * * Notes: * * * Order of internal properties should match frequency of use, since the * properties will be linearly scanned on lookup (functions usually don't * have enough properties to warrant a hash part). * * * The created closure is independent of its template; they do share the * same 'data' buffer object, but the template object itself can be freed * even if the closure object remains reachable. */ DUK_LOCAL void duk__inc_data_inner_refcounts(duk_hthread *thr, duk_hcompfunc *f) { duk_tval *tv, *tv_end; duk_hobject **funcs, **funcs_end; DUK_UNREF(thr); /* If function creation fails due to out-of-memory, the data buffer * pointer may be NULL in some cases. That's actually possible for * GC code, but shouldn't be possible here because the incomplete * function will be unwound from the value stack and never instantiated. */ DUK_ASSERT(DUK_HCOMPFUNC_GET_DATA(thr->heap, f) != NULL); tv = DUK_HCOMPFUNC_GET_CONSTS_BASE(thr->heap, f); tv_end = DUK_HCOMPFUNC_GET_CONSTS_END(thr->heap, f); while (tv < tv_end) { DUK_TVAL_INCREF(thr, tv); tv++; } funcs = DUK_HCOMPFUNC_GET_FUNCS_BASE(thr->heap, f); funcs_end = DUK_HCOMPFUNC_GET_FUNCS_END(thr->heap, f); while (funcs < funcs_end) { DUK_HEAPHDR_INCREF(thr, (duk_heaphdr *) *funcs); funcs++; } } /* Push a new closure on the stack. * * Note: if fun_temp has NEWENV, i.e. a new lexical and variable declaration * is created when the function is called, only outer_lex_env matters * (outer_var_env is ignored and may or may not be same as outer_lex_env). */ DUK_LOCAL const duk_uint16_t duk__closure_copy_proplist[] = { /* order: most frequent to least frequent */ DUK_STRIDX_INT_VARMAP, DUK_STRIDX_INT_FORMALS, #if defined(DUK_USE_PC2LINE) DUK_STRIDX_INT_PC2LINE, #endif #if defined(DUK_USE_FUNC_FILENAME_PROPERTY) DUK_STRIDX_FILE_NAME, #endif #if defined(DUK_USE_NONSTD_FUNC_SOURCE_PROPERTY) DUK_STRIDX_INT_SOURCE #endif }; DUK_INTERNAL void duk_js_push_closure(duk_hthread *thr, duk_hcompfunc *fun_temp, duk_hobject *outer_var_env, duk_hobject *outer_lex_env, duk_bool_t add_auto_proto) { duk_hcompfunc *fun_clos; duk_harray *formals; duk_small_uint_t i; duk_uint_t len_value; DUK_ASSERT(fun_temp != NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_DATA(thr->heap, fun_temp) != NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_FUNCS(thr->heap, fun_temp) != NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_BYTECODE(thr->heap, fun_temp) != NULL); DUK_ASSERT(outer_var_env != NULL); DUK_ASSERT(outer_lex_env != NULL); DUK_UNREF(len_value); DUK_STATS_INC(thr->heap, stats_envrec_pushclosure); fun_clos = duk_push_hcompfunc(thr); DUK_ASSERT(fun_clos != NULL); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) fun_clos) == thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); duk_push_hobject(thr, &fun_temp->obj); /* -> [ ... closure template ] */ DUK_ASSERT(DUK_HOBJECT_IS_COMPFUNC((duk_hobject *) fun_clos)); DUK_ASSERT(DUK_HCOMPFUNC_GET_DATA(thr->heap, fun_clos) == NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_FUNCS(thr->heap, fun_clos) == NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_BYTECODE(thr->heap, fun_clos) == NULL); DUK_HCOMPFUNC_SET_DATA(thr->heap, fun_clos, DUK_HCOMPFUNC_GET_DATA(thr->heap, fun_temp)); DUK_HCOMPFUNC_SET_FUNCS(thr->heap, fun_clos, DUK_HCOMPFUNC_GET_FUNCS(thr->heap, fun_temp)); DUK_HCOMPFUNC_SET_BYTECODE(thr->heap, fun_clos, DUK_HCOMPFUNC_GET_BYTECODE(thr->heap, fun_temp)); /* Note: all references inside 'data' need to get their refcounts * upped too. This is the case because refcounts are decreased * through every function referencing 'data' independently. */ DUK_HBUFFER_INCREF(thr, DUK_HCOMPFUNC_GET_DATA(thr->heap, fun_clos)); duk__inc_data_inner_refcounts(thr, fun_temp); fun_clos->nregs = fun_temp->nregs; fun_clos->nargs = fun_temp->nargs; #if defined(DUK_USE_DEBUGGER_SUPPORT) fun_clos->start_line = fun_temp->start_line; fun_clos->end_line = fun_temp->end_line; #endif DUK_ASSERT(DUK_HCOMPFUNC_GET_DATA(thr->heap, fun_clos) != NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_FUNCS(thr->heap, fun_clos) != NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_BYTECODE(thr->heap, fun_clos) != NULL); /* XXX: Could also copy from template, but there's no way to have any * other value here now (used code has no access to the template). * Prototype is set by duk_push_hcompfunc(). */ DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, &fun_clos->obj) == thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); #if 0 DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, &fun_clos->obj, thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); #endif /* Copy duk_hobject flags as is from the template using a mask. * Leave out duk_heaphdr owned flags just in case (e.g. if there's * some GC flag or similar). Some flags can then be adjusted * separately if necessary. */ /* DUK_HEAPHDR_SET_FLAGS() masks changes to non-duk_heaphdr flags only. */ DUK_HEAPHDR_SET_FLAGS((duk_heaphdr *) fun_clos, DUK_HEAPHDR_GET_FLAGS_RAW((duk_heaphdr *) fun_temp)); DUK_DD(DUK_DDPRINT("fun_temp heaphdr flags: 0x%08lx, fun_clos heaphdr flags: 0x%08lx", (unsigned long) DUK_HEAPHDR_GET_FLAGS_RAW((duk_heaphdr *) fun_temp), (unsigned long) DUK_HEAPHDR_GET_FLAGS_RAW((duk_heaphdr *) fun_clos))); DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(&fun_clos->obj)); DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(&fun_clos->obj)); DUK_ASSERT(DUK_HOBJECT_HAS_COMPFUNC(&fun_clos->obj)); DUK_ASSERT(!DUK_HOBJECT_HAS_NATFUNC(&fun_clos->obj)); DUK_ASSERT(!DUK_HOBJECT_IS_THREAD(&fun_clos->obj)); /* DUK_HOBJECT_FLAG_ARRAY_PART: don't care */ /* DUK_HOBJECT_FLAG_NEWENV: handled below */ DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARRAY(&fun_clos->obj)); DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(&fun_clos->obj)); DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(&fun_clos->obj)); if (!DUK_HOBJECT_HAS_CONSTRUCTABLE(&fun_clos->obj)) { /* If the template is not constructable don't add an automatic * .prototype property. This is the case for e.g. ES2015 object * literal getters/setters and method definitions. */ add_auto_proto = 0; } /* * Setup environment record properties based on the template and * its flags. * * If DUK_HOBJECT_HAS_NEWENV(fun_temp) is true, the environment * records represent identifiers "outside" the function; the * "inner" environment records are created on demand. Otherwise, * the environment records are those that will be directly used * (e.g. for declarations). * * _Lexenv is always set; _Varenv defaults to _Lexenv if missing, * so _Varenv is only set if _Lexenv != _Varenv. * * This is relatively complex, see doc/identifier-handling.rst. */ if (DUK_HOBJECT_HAS_NEWENV(&fun_clos->obj)) { #if defined(DUK_USE_FUNC_NAME_PROPERTY) if (DUK_HOBJECT_HAS_NAMEBINDING(&fun_clos->obj)) { duk_hobject *proto; duk_hdecenv *new_env; /* * Named function expression, name needs to be bound * in an intermediate environment record. The "outer" * lexical/variable environment will thus be: * * a) { funcname: , __prototype: outer_lex_env } * b) { funcname: , __prototype: } (if outer_lex_env missing) */ if (outer_lex_env) { proto = outer_lex_env; } else { proto = thr->builtins[DUK_BIDX_GLOBAL_ENV]; } /* -> [ ... closure template env ] */ new_env = duk_hdecenv_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV)); DUK_ASSERT(new_env != NULL); duk_push_hobject(thr, (duk_hobject *) new_env); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) new_env) == NULL); DUK_HOBJECT_SET_PROTOTYPE(thr->heap, (duk_hobject *) new_env, proto); DUK_HOBJECT_INCREF_ALLOWNULL(thr, proto); DUK_ASSERT(new_env->thread == NULL); /* Closed. */ DUK_ASSERT(new_env->varmap == NULL); /* It's important that duk_xdef_prop() is a 'raw define' so that any * properties in an ancestor are never an issue (they should never be * e.g. non-writable, but just in case). * * Because template objects are not visible to user code, the case * where .name is missing shouldn't happen in practice. It it does, * the name 'undefined' gets bound and maps to the closure (which is * a bit odd, but safe). */ (void) duk_get_prop_stridx_short(thr, -2, DUK_STRIDX_NAME); /* -> [ ... closure template env funcname ] */ duk_dup_m4(thr); /* -> [ ... closure template env funcname closure ] */ duk_xdef_prop(thr, -3, DUK_PROPDESC_FLAGS_NONE); /* -> [ ... closure template env ] */ /* env[funcname] = closure */ /* [ ... closure template env ] */ DUK_HCOMPFUNC_SET_LEXENV(thr->heap, fun_clos, (duk_hobject *) new_env); DUK_HCOMPFUNC_SET_VARENV(thr->heap, fun_clos, (duk_hobject *) new_env); DUK_HOBJECT_INCREF(thr, (duk_hobject *) new_env); DUK_HOBJECT_INCREF(thr, (duk_hobject *) new_env); duk_pop_unsafe(thr); /* [ ... closure template ] */ } else #endif /* DUK_USE_FUNC_NAME_PROPERTY */ { /* * Other cases (function declaration, anonymous function expression, * strict direct eval code). The "outer" environment will be whatever * the caller gave us. */ DUK_HCOMPFUNC_SET_LEXENV(thr->heap, fun_clos, outer_lex_env); DUK_HCOMPFUNC_SET_VARENV(thr->heap, fun_clos, outer_lex_env); DUK_HOBJECT_INCREF(thr, outer_lex_env); DUK_HOBJECT_INCREF(thr, outer_lex_env); /* [ ... closure template ] */ } } else { /* * Function gets no new environment when called. This is the * case for global code, indirect eval code, and non-strict * direct eval code. There is no direct correspondence to the * E5 specification, as global/eval code is not exposed as a * function. */ DUK_ASSERT(!DUK_HOBJECT_HAS_NAMEBINDING(&fun_temp->obj)); DUK_HCOMPFUNC_SET_LEXENV(thr->heap, fun_clos, outer_lex_env); DUK_HCOMPFUNC_SET_VARENV(thr->heap, fun_clos, outer_var_env); DUK_HOBJECT_INCREF(thr, outer_lex_env); /* NULLs not allowed; asserted on entry */ DUK_HOBJECT_INCREF(thr, outer_var_env); } DUK_DDD(DUK_DDDPRINT("closure varenv -> %!ipO, lexenv -> %!ipO", (duk_heaphdr *) fun_clos->var_env, (duk_heaphdr *) fun_clos->lex_env)); /* Call handling assumes this for all callable closures. */ DUK_ASSERT(DUK_HCOMPFUNC_GET_LEXENV(thr->heap, fun_clos) != NULL); DUK_ASSERT(DUK_HCOMPFUNC_GET_VARENV(thr->heap, fun_clos) != NULL); /* * Copy some internal properties directly * * The properties will be non-writable and non-enumerable, but * configurable. * * Function templates are bare objects, so inheritance of internal * Symbols is not an issue here even when using ordinary property * reads. The function instance created is not bare, so internal * Symbols must be defined without inheritance checks. */ /* [ ... closure template ] */ DUK_DDD(DUK_DDDPRINT("copying properties: closure=%!iT, template=%!iT", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); for (i = 0; i < (duk_small_uint_t) (sizeof(duk__closure_copy_proplist) / sizeof(duk_uint16_t)); i++) { duk_small_int_t stridx = (duk_small_int_t) duk__closure_copy_proplist[i]; if (duk_xget_owndataprop_stridx_short(thr, -1, stridx)) { /* [ ... closure template val ] */ DUK_DDD(DUK_DDDPRINT("copying property, stridx=%ld -> found", (long) stridx)); duk_xdef_prop_stridx_short(thr, -3, stridx, DUK_PROPDESC_FLAGS_C); } else { DUK_DDD(DUK_DDDPRINT("copying property, stridx=%ld -> not found", (long) stridx)); duk_pop_unsafe(thr); } } /* * "length" maps to number of formals (E5 Section 13.2) for function * declarations/expressions (non-bound functions). Note that 'nargs' * is NOT necessarily equal to the number of arguments. Use length * of _Formals; if missing, assume nargs matches .length. */ /* [ ... closure template ] */ formals = duk_hobject_get_formals(thr, (duk_hobject *) fun_temp); if (formals) { len_value = (duk_uint_t) formals->length; DUK_DD(DUK_DDPRINT("closure length from _Formals -> %ld", (long) len_value)); } else { len_value = fun_temp->nargs; DUK_DD(DUK_DDPRINT("closure length defaulted from nargs -> %ld", (long) len_value)); } duk_push_uint(thr, len_value); /* [ ... closure template len_value ] */ duk_xdef_prop_stridx_short(thr, -3, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_C); /* * "prototype" is, by default, a fresh object with the "constructor" * property. * * Note that this creates a circular reference for every function * instance (closure) which prevents refcount-based collection of * function instances. * * XXX: Try to avoid creating the default prototype object, because * many functions are not used as constructors and the default * prototype is unnecessary. Perhaps it could be created on-demand * when it is first accessed? */ /* [ ... closure template ] */ if (add_auto_proto) { duk_push_object(thr); /* -> [ ... closure template newobj ] */ duk_dup_m3(thr); /* -> [ ... closure template newobj closure ] */ duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_CONSTRUCTOR, DUK_PROPDESC_FLAGS_WC); /* -> [ ... closure template newobj ] */ duk_compact(thr, -1); /* compact the prototype */ duk_xdef_prop_stridx_short(thr, -3, DUK_STRIDX_PROTOTYPE, DUK_PROPDESC_FLAGS_W); /* -> [ ... closure template ] */ } /* * "arguments" and "caller" must be mapped to throwers for strict * mode and bound functions (E5 Section 15.3.5). * * XXX: This is expensive to have for every strict function instance. * Try to implement as virtual properties or on-demand created properties. */ /* [ ... closure template ] */ if (DUK_HOBJECT_HAS_STRICT(&fun_clos->obj)) { duk_xdef_prop_stridx_thrower(thr, -2, DUK_STRIDX_CALLER); duk_xdef_prop_stridx_thrower(thr, -2, DUK_STRIDX_LC_ARGUMENTS); } else { #if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY) DUK_DDD(DUK_DDDPRINT("function is non-strict and non-standard 'caller' property in use, add initial 'null' value")); duk_push_null(thr); duk_xdef_prop_stridx_short(thr, -3, DUK_STRIDX_CALLER, DUK_PROPDESC_FLAGS_NONE); #else DUK_DDD(DUK_DDDPRINT("function is non-strict and non-standard 'caller' property not used")); #endif } /* * "name" used to be non-standard but is now defined by ES2015. * In ES2015/ES2016 the .name property is configurable. */ /* [ ... closure template ] */ #if defined(DUK_USE_FUNC_NAME_PROPERTY) /* XXX: Look for own property only; doesn't matter much because * templates are bare objects. */ if (duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_NAME)) { /* [ ... closure template name ] */ DUK_ASSERT(duk_is_string(thr, -1)); DUK_DD(DUK_DDPRINT("setting function instance name to %!T", duk_get_tval(thr, -1))); duk_xdef_prop_stridx_short(thr, -3, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_C); /* -> [ ... closure template ] */ } else { /* Anonymous functions don't have a .name in ES2015, so don't set * it on the instance either. The instance will then inherit * it from Function.prototype.name. */ DUK_DD(DUK_DDPRINT("not setting function instance .name")); duk_pop_unsafe(thr); } #endif /* * Compact the closure, in most cases no properties will be added later. * Also, without this the closures end up having unused property slots * (e.g. in Duktape 0.9.0, 8 slots would be allocated and only 7 used). * A better future solution would be to allocate the closure directly * to correct size (and setup the properties directly without going * through the API). */ duk_compact(thr, -2); /* * Some assertions (E5 Section 13.2). */ DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(&fun_clos->obj) == DUK_HOBJECT_CLASS_FUNCTION); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, &fun_clos->obj) == thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]); DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(&fun_clos->obj)); DUK_ASSERT(duk_has_prop_stridx(thr, -2, DUK_STRIDX_LENGTH) != 0); DUK_ASSERT(add_auto_proto == 0 || duk_has_prop_stridx(thr, -2, DUK_STRIDX_PROTOTYPE) != 0); /* May be missing .name */ DUK_ASSERT(!DUK_HOBJECT_HAS_STRICT(&fun_clos->obj) || duk_has_prop_stridx(thr, -2, DUK_STRIDX_CALLER) != 0); DUK_ASSERT(!DUK_HOBJECT_HAS_STRICT(&fun_clos->obj) || duk_has_prop_stridx(thr, -2, DUK_STRIDX_LC_ARGUMENTS) != 0); /* * Finish */ /* [ ... closure template ] */ DUK_DDD(DUK_DDDPRINT("created function instance: template=%!iT -> closure=%!iT", (duk_tval *) duk_get_tval(thr, -1), (duk_tval *) duk_get_tval(thr, -2))); duk_pop_unsafe(thr); /* [ ... closure ] */ } /* * Delayed activation environment record initialization (for functions * with NEWENV). * * The non-delayed initialization is handled by duk_handle_call(). */ DUK_LOCAL void duk__preallocate_env_entries(duk_hthread *thr, duk_hobject *varmap, duk_hobject *env) { duk_uint_fast32_t i; for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(varmap); i++) { duk_hstring *key; key = DUK_HOBJECT_E_GET_KEY(thr->heap, varmap, i); DUK_ASSERT(key != NULL); /* assume keys are compact in _Varmap */ DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, varmap, i)); /* assume plain values */ /* Predefine as 'undefined' to reserve a property slot. * This makes the unwind process (where register values * are copied to the env object) safe against throwing. * * XXX: This could be made much faster by creating the * property table directly. */ duk_push_undefined(thr); DUK_DDD(DUK_DDDPRINT("preallocate env entry for key %!O", key)); duk_hobject_define_property_internal(thr, env, key, DUK_PROPDESC_FLAGS_WE); } } /* shared helper */ DUK_INTERNAL duk_hobject *duk_create_activation_environment_record(duk_hthread *thr, duk_hobject *func, duk_size_t bottom_byteoff) { duk_hdecenv *env; duk_hobject *parent; duk_hcompfunc *f; DUK_ASSERT(thr != NULL); DUK_ASSERT(func != NULL); DUK_STATS_INC(thr->heap, stats_envrec_create); f = (duk_hcompfunc *) func; parent = DUK_HCOMPFUNC_GET_LEXENV(thr->heap, f); if (!parent) { parent = thr->builtins[DUK_BIDX_GLOBAL_ENV]; } env = duk_hdecenv_alloc(thr, DUK_HOBJECT_FLAG_EXTENSIBLE | DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV)); DUK_ASSERT(env != NULL); duk_push_hobject(thr, (duk_hobject *) env); DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) env) == NULL); DUK_HOBJECT_SET_PROTOTYPE(thr->heap, (duk_hobject *) env, parent); DUK_HOBJECT_INCREF_ALLOWNULL(thr, parent); /* parent env is the prototype */ /* open scope information, for compiled functions only */ DUK_ASSERT(env->thread == NULL); DUK_ASSERT(env->varmap == NULL); DUK_ASSERT(env->regbase_byteoff == 0); if (DUK_HOBJECT_IS_COMPFUNC(func)) { duk_hobject *varmap; varmap = duk_hobject_get_varmap(thr, func); if (varmap != NULL) { env->varmap = varmap; DUK_HOBJECT_INCREF(thr, varmap); env->thread = thr; DUK_HTHREAD_INCREF(thr, thr); env->regbase_byteoff = bottom_byteoff; /* Preallocate env property table to avoid potential * for out-of-memory on unwind when the env is closed. */ duk__preallocate_env_entries(thr, varmap, (duk_hobject *) env); } else { /* If function has no _Varmap, leave the environment closed. */ DUK_ASSERT(env->thread == NULL); DUK_ASSERT(env->varmap == NULL); DUK_ASSERT(env->regbase_byteoff == 0); } } return (duk_hobject *) env; } DUK_INTERNAL void duk_js_init_activation_environment_records_delayed(duk_hthread *thr, duk_activation *act) { duk_hobject *func; duk_hobject *env; DUK_ASSERT(thr != NULL); func = DUK_ACT_GET_FUNC(act); DUK_ASSERT(func != NULL); DUK_ASSERT(!DUK_HOBJECT_HAS_BOUNDFUNC(func)); /* bound functions are never in act 'func' */ /* * Delayed initialization only occurs for 'NEWENV' functions. */ DUK_ASSERT(DUK_HOBJECT_HAS_NEWENV(func)); DUK_ASSERT(act->lex_env == NULL); DUK_ASSERT(act->var_env == NULL); DUK_STATS_INC(thr->heap, stats_envrec_delayedcreate); env = duk_create_activation_environment_record(thr, func, act->bottom_byteoff); DUK_ASSERT(env != NULL); /* 'act' is a stable pointer, so still OK. */ DUK_DDD(DUK_DDDPRINT("created delayed fresh env: %!ipO", (duk_heaphdr *) env)); #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) { duk_hobject *p = env; while (p) { DUK_DDD(DUK_DDDPRINT(" -> %!ipO", (duk_heaphdr *) p)); p = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, p); } } #endif act->lex_env = env; act->var_env = env; DUK_HOBJECT_INCREF(thr, env); /* XXX: incref by count (here 2 times) */ DUK_HOBJECT_INCREF(thr, env); duk_pop_unsafe(thr); } /* * Closing environment records. * * The environment record MUST be closed with the thread where its activation * is; i.e. if 'env' is open, 'thr' must match env->thread, and the regbase * and varmap must still be valid. On entry, 'env' must be reachable. */ DUK_INTERNAL void duk_js_close_environment_record(duk_hthread *thr, duk_hobject *env) { duk_uint_fast32_t i; duk_hobject *varmap; duk_hstring *key; duk_tval *tv; duk_uint_t regnum; DUK_ASSERT(thr != NULL); DUK_ASSERT(env != NULL); if (DUK_UNLIKELY(!DUK_HOBJECT_IS_DECENV(env))) { DUK_DDD(DUK_DDDPRINT("env not a declarative record: %!iO", (duk_heaphdr *) env)); return; } varmap = ((duk_hdecenv *) env)->varmap; if (varmap == NULL) { DUK_DDD(DUK_DDDPRINT("env already closed: %!iO", (duk_heaphdr *) env)); return; } DUK_ASSERT(((duk_hdecenv *) env)->thread != NULL); DUK_HDECENV_ASSERT_VALID((duk_hdecenv *) env); DUK_DDD(DUK_DDDPRINT("closing env: %!iO", (duk_heaphdr *) env)); DUK_DDD(DUK_DDDPRINT("varmap: %!O", (duk_heaphdr *) varmap)); /* Env must be closed in the same thread as where it runs. */ DUK_ASSERT(((duk_hdecenv *) env)->thread == thr); /* XXX: additional conditions when to close variables? we don't want to do it * unless the environment may have "escaped" (referenced in a function closure). * With delayed environments, the existence is probably good enough of a check. */ /* Note: we rely on the _Varmap having a bunch of nice properties, like: * - being compacted and unmodified during this process * - not containing an array part * - having correct value types */ DUK_DDD(DUK_DDDPRINT("copying bound register values, %ld bound regs", (long) DUK_HOBJECT_GET_ENEXT(varmap))); /* Copy over current variable values from value stack to the * environment record. The scope object is empty but may * inherit from another scope which has conflicting names. */ /* XXX: Do this using a once allocated entry area, no side effects. * Hash part would need special treatment however (maybe copy, and * then realloc with hash part if large enough). */ for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(varmap); i++) { duk_size_t regbase_byteoff; key = DUK_HOBJECT_E_GET_KEY(thr->heap, varmap, i); DUK_ASSERT(key != NULL); /* assume keys are compact in _Varmap */ DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, varmap, i)); /* assume plain values */ tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, varmap, i); DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); DUK_ASSERT(DUK_TVAL_GET_NUMBER(tv) <= (duk_double_t) DUK_UINT32_MAX); /* limits */ #if defined(DUK_USE_FASTINT) DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv)); regnum = (duk_uint_t) DUK_TVAL_GET_FASTINT_U32(tv); #else regnum = (duk_uint_t) DUK_TVAL_GET_NUMBER(tv); #endif regbase_byteoff = ((duk_hdecenv *) env)->regbase_byteoff; DUK_ASSERT((duk_uint8_t *) thr->valstack + regbase_byteoff + sizeof(duk_tval) * regnum >= (duk_uint8_t *) thr->valstack); DUK_ASSERT((duk_uint8_t *) thr->valstack + regbase_byteoff + sizeof(duk_tval) * regnum < (duk_uint8_t *) thr->valstack_top); /* Write register value into env as named properties. * If property already exists, overwrites silently. * Property is writable, but not deletable (not configurable * in terms of property attributes). * * This property write must not throw because we're unwinding * and unwind code is not allowed to throw at present. The * call itself has no such guarantees, but we've preallocated * entries for each property when the env was created, so no * out-of-memory error should be possible. If this guarantee * is not provided, problems like GH-476 may happen. */ duk_push_tval(thr, (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + regbase_byteoff + sizeof(duk_tval) * regnum)); DUK_DDD(DUK_DDDPRINT("closing identifier %!O -> reg %ld, value %!T", (duk_heaphdr *) key, (long) regnum, (duk_tval *) duk_get_tval(thr, -1))); duk_hobject_define_property_internal(thr, env, key, DUK_PROPDESC_FLAGS_WE); } /* NULL atomically to avoid inconsistent state + side effects. */ DUK_HOBJECT_DECREF_NORZ(thr, ((duk_hdecenv *) env)->thread); DUK_HOBJECT_DECREF_NORZ(thr, ((duk_hdecenv *) env)->varmap); ((duk_hdecenv *) env)->thread = NULL; ((duk_hdecenv *) env)->varmap = NULL; DUK_DDD(DUK_DDDPRINT("env after closing: %!O", (duk_heaphdr *) env)); } /* * GETIDREF: a GetIdentifierReference-like helper. * * Provides a parent traversing lookup and a single level lookup * (for HasBinding). * * Instead of returning the value, returns a bunch of values allowing * the caller to read, write, or delete the binding. Value pointers * are duk_tval pointers which can be mutated directly as long as * refcounts are properly updated. Note that any operation which may * reallocate valstacks or compact objects may invalidate the returned * duk_tval (but not object) pointers, so caller must be very careful. * * If starting environment record 'env' is given, 'act' is ignored. * However, if 'env' is NULL, the caller may identify, in 'act', an * activation which hasn't had its declarative environment initialized * yet. The activation registers are then looked up, and its parent * traversed normally. * * The 'out' structure values are only valid if the function returns * success (non-zero). */ /* lookup name from an open declarative record's registers */ DUK_LOCAL duk_bool_t duk__getid_open_decl_env_regs(duk_hthread *thr, duk_hstring *name, duk_hdecenv *env, duk__id_lookup_result *out) { duk_tval *tv; duk_size_t reg_rel; DUK_ASSERT(thr != NULL); DUK_ASSERT(name != NULL); DUK_ASSERT(env != NULL); DUK_ASSERT(out != NULL); DUK_ASSERT(DUK_HOBJECT_IS_DECENV((duk_hobject *) env)); DUK_HDECENV_ASSERT_VALID(env); if (env->thread == NULL) { /* already closed */ return 0; } DUK_ASSERT(env->varmap != NULL); tv = duk_hobject_find_entry_tval_ptr(thr->heap, env->varmap, name); if (DUK_UNLIKELY(tv == NULL)) { return 0; } DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); DUK_ASSERT(DUK_TVAL_GET_NUMBER(tv) <= (duk_double_t) DUK_UINT32_MAX); /* limits */ #if defined(DUK_USE_FASTINT) DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv)); reg_rel = (duk_size_t) DUK_TVAL_GET_FASTINT_U32(tv); #else reg_rel = (duk_size_t) DUK_TVAL_GET_NUMBER(tv); #endif DUK_ASSERT_DISABLE(reg_rel >= 0); /* unsigned */ tv = (duk_tval *) (void *) ((duk_uint8_t *) env->thread->valstack + env->regbase_byteoff + sizeof(duk_tval) * reg_rel); DUK_ASSERT(tv >= env->thread->valstack && tv < env->thread->valstack_end); /* XXX: more accurate? */ out->value = tv; out->attrs = DUK_PROPDESC_FLAGS_W; /* registers are mutable, non-deletable */ out->env = (duk_hobject *) env; out->holder = NULL; out->has_this = 0; return 1; } /* lookup name from current activation record's functions' registers */ DUK_LOCAL duk_bool_t duk__getid_activation_regs(duk_hthread *thr, duk_hstring *name, duk_activation *act, duk__id_lookup_result *out) { duk_tval *tv; duk_hobject *func; duk_hobject *varmap; duk_size_t reg_rel; DUK_ASSERT(thr != NULL); DUK_ASSERT(name != NULL); DUK_ASSERT(act != NULL); DUK_ASSERT(out != NULL); func = DUK_ACT_GET_FUNC(act); DUK_ASSERT(func != NULL); DUK_ASSERT(DUK_HOBJECT_HAS_NEWENV(func)); if (!DUK_HOBJECT_IS_COMPFUNC(func)) { return 0; } /* XXX: move varmap to duk_hcompfunc struct field? */ varmap = duk_hobject_get_varmap(thr, func); if (!varmap) { return 0; } tv = duk_hobject_find_entry_tval_ptr(thr->heap, varmap, name); if (!tv) { return 0; } DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); reg_rel = (duk_size_t) DUK_TVAL_GET_NUMBER(tv); DUK_ASSERT_DISABLE(reg_rel >= 0); DUK_ASSERT(reg_rel < ((duk_hcompfunc *) func)->nregs); tv = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + act->bottom_byteoff); tv += reg_rel; out->value = tv; out->attrs = DUK_PROPDESC_FLAGS_W; /* registers are mutable, non-deletable */ out->env = NULL; out->holder = NULL; out->has_this = 0; return 1; } DUK_LOCAL duk_bool_t duk__get_identifier_reference(duk_hthread *thr, duk_hobject *env, duk_hstring *name, duk_activation *act, duk_bool_t parents, duk__id_lookup_result *out) { duk_tval *tv; duk_uint_t sanity; DUK_ASSERT(thr != NULL); DUK_ASSERT(env != NULL || act != NULL); DUK_ASSERT(name != NULL); DUK_ASSERT(out != NULL); DUK_ASSERT(!env || DUK_HOBJECT_IS_ENV(env)); DUK_ASSERT(!env || !DUK_HOBJECT_HAS_ARRAY_PART(env)); /* * Conceptually, we look for the identifier binding by starting from * 'env' and following to chain of environment records (represented * by the prototype chain). * * If 'env' is NULL, the current activation does not yet have an * allocated declarative environment record; this should be treated * exactly as if the environment record existed but had no bindings * other than register bindings. * * Note: we assume that with the DUK_HOBJECT_FLAG_NEWENV cleared * the environment will always be initialized immediately; hence * a NULL 'env' should only happen with the flag set. This is the * case for: (1) function calls, and (2) strict, direct eval calls. */ if (env == NULL && act != NULL) { duk_hobject *func; duk_hcompfunc *f; DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference: env is NULL, activation is non-NULL -> " "delayed env case, look up activation regs first")); /* * Try registers */ if (duk__getid_activation_regs(thr, name, act, out)) { DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference successful: " "name=%!O -> value=%!T, attrs=%ld, has_this=%ld, env=%!O, holder=%!O " "(found from register bindings when env=NULL)", (duk_heaphdr *) name, (duk_tval *) out->value, (long) out->attrs, (long) out->has_this, (duk_heaphdr *) out->env, (duk_heaphdr *) out->holder)); return 1; } DUK_DDD(DUK_DDDPRINT("not found in current activation regs")); /* * Not found in registers, proceed to the parent record. * Here we need to determine what the parent would be, * if 'env' was not NULL (i.e. same logic as when initializing * the record). * * Note that environment initialization is only deferred when * DUK_HOBJECT_HAS_NEWENV is set, and this only happens for: * - Function code * - Strict eval code * * We only need to check _Lexenv here; _Varenv exists only if it * differs from _Lexenv (and thus _Lexenv will also be present). */ if (!parents) { DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference failed, no parent traversal " "(not found from register bindings when env=NULL)")); goto fail_not_found; } func = DUK_ACT_GET_FUNC(act); DUK_ASSERT(func != NULL); DUK_ASSERT(DUK_HOBJECT_HAS_NEWENV(func)); f = (duk_hcompfunc *) func; env = DUK_HCOMPFUNC_GET_LEXENV(thr->heap, f); if (!env) { env = thr->builtins[DUK_BIDX_GLOBAL_ENV]; } DUK_DDD(DUK_DDDPRINT("continue lookup from env: %!iO", (duk_heaphdr *) env)); } /* * Prototype walking starting from 'env'. * * ('act' is not needed anywhere here.) */ sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY; while (env != NULL) { duk_small_uint_t cl; duk_uint_t attrs; DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference, name=%!O, considering env=%p -> %!iO", (duk_heaphdr *) name, (void *) env, (duk_heaphdr *) env)); DUK_ASSERT(env != NULL); DUK_ASSERT(DUK_HOBJECT_IS_ENV(env)); DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(env)); cl = DUK_HOBJECT_GET_CLASS_NUMBER(env); DUK_ASSERT(cl == DUK_HOBJECT_CLASS_OBJENV || cl == DUK_HOBJECT_CLASS_DECENV); if (cl == DUK_HOBJECT_CLASS_DECENV) { /* * Declarative environment record. * * Identifiers can never be stored in ancestors and are * always plain values, so we can use an internal helper * and access the value directly with an duk_tval ptr. * * A closed environment is only indicated by it missing * the "book-keeping" properties required for accessing * register-bound variables. */ DUK_HDECENV_ASSERT_VALID((duk_hdecenv *) env); if (duk__getid_open_decl_env_regs(thr, name, (duk_hdecenv *) env, out)) { DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference successful: " "name=%!O -> value=%!T, attrs=%ld, has_this=%ld, env=%!O, holder=%!O " "(declarative environment record, scope open, found in regs)", (duk_heaphdr *) name, (duk_tval *) out->value, (long) out->attrs, (long) out->has_this, (duk_heaphdr *) out->env, (duk_heaphdr *) out->holder)); return 1; } tv = duk_hobject_find_entry_tval_ptr_and_attrs(thr->heap, env, name, &attrs); if (tv) { out->value = tv; out->attrs = attrs; out->env = env; out->holder = env; out->has_this = 0; DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference successful: " "name=%!O -> value=%!T, attrs=%ld, has_this=%ld, env=%!O, holder=%!O " "(declarative environment record, found in properties)", (duk_heaphdr *) name, (duk_tval *) out->value, (long) out->attrs, (long) out->has_this, (duk_heaphdr *) out->env, (duk_heaphdr *) out->holder)); return 1; } } else { /* * Object environment record. * * Binding (target) object is an external, uncontrolled object. * Identifier may be bound in an ancestor property, and may be * an accessor. Target can also be a Proxy which we must support * here. */ /* XXX: we could save space by using _Target OR _This. If _Target, assume * this binding is undefined. If _This, assumes this binding is _This, and * target is also _This. One property would then be enough. */ duk_hobject *target; duk_bool_t found; DUK_ASSERT(cl == DUK_HOBJECT_CLASS_OBJENV); DUK_HOBJENV_ASSERT_VALID((duk_hobjenv *) env); target = ((duk_hobjenv *) env)->target; DUK_ASSERT(target != NULL); /* Target may be a Proxy or property may be an accessor, so we must * use an actual, Proxy-aware hasprop check here. * * out->holder is NOT set to the actual duk_hobject where the * property is found, but rather the object binding target object. */ #if defined(DUK_USE_ES6_PROXY) if (DUK_UNLIKELY(DUK_HOBJECT_IS_PROXY(target))) { duk_tval tv_name; duk_tval tv_target_tmp; DUK_ASSERT(name != NULL); DUK_TVAL_SET_STRING(&tv_name, name); DUK_TVAL_SET_OBJECT(&tv_target_tmp, target); found = duk_hobject_hasprop(thr, &tv_target_tmp, &tv_name); } else #endif /* DUK_USE_ES6_PROXY */ { /* XXX: duk_hobject_hasprop() would be correct for * non-Proxy objects too, but it is about ~20-25% * slower at present so separate code paths for * Proxy and non-Proxy now. */ found = duk_hobject_hasprop_raw(thr, target, name); } if (found) { out->value = NULL; /* can't get value, may be accessor */ out->attrs = 0; /* irrelevant when out->value == NULL */ out->env = env; out->holder = target; out->has_this = ((duk_hobjenv *) env)->has_this; DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference successful: " "name=%!O -> value=%!T, attrs=%ld, has_this=%ld, env=%!O, holder=%!O " "(object environment record)", (duk_heaphdr *) name, (duk_tval *) out->value, (long) out->attrs, (long) out->has_this, (duk_heaphdr *) out->env, (duk_heaphdr *) out->holder)); return 1; } } if (!parents) { DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference failed, no parent traversal " "(not found from first traversed env)")); goto fail_not_found; } if (DUK_UNLIKELY(sanity-- == 0)) { DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT); DUK_WO_NORETURN(return 0;); } env = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, env); } /* * Not found (even in global object) */ fail_not_found: return 0; } /* * HASVAR: check identifier binding from a given environment record * without traversing its parents. * * This primitive is not exposed to user code as such, but is used * internally for e.g. declaration binding instantiation. * * See E5 Sections: * 10.2.1.1.1 HasBinding(N) * 10.2.1.2.1 HasBinding(N) * * Note: strictness has no bearing on this check. Hence we don't take * a 'strict' parameter. */ #if 0 /*unused*/ DUK_INTERNAL duk_bool_t duk_js_hasvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name) { duk__id_lookup_result ref; duk_bool_t parents; DUK_DDD(DUK_DDDPRINT("hasvar: thr=%p, env=%p, name=%!O " "(env -> %!dO)", (void *) thr, (void *) env, (duk_heaphdr *) name, (duk_heaphdr *) env)); DUK_ASSERT(thr != NULL); DUK_ASSERT(env != NULL); DUK_ASSERT(name != NULL); DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(env); DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(name); DUK_ASSERT(DUK_HOBJECT_IS_ENV(env)); DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(env)); /* lookup results is ignored */ parents = 0; return duk__get_identifier_reference(thr, env, name, NULL, parents, &ref); } #endif /* * GETVAR * * See E5 Sections: * 11.1.2 Identifier Reference * 10.3.1 Identifier Resolution * 11.13.1 Simple Assignment [example of where the Reference is GetValue'd] * 8.7.1 GetValue (V) * 8.12.1 [[GetOwnProperty]] (P) * 8.12.2 [[GetProperty]] (P) * 8.12.3 [[Get]] (P) * * If 'throw' is true, always leaves two values on top of stack: [val this]. * * If 'throw' is false, returns 0 if identifier cannot be resolved, and the * stack will be unaffected in this case. If identifier is resolved, returns * 1 and leaves [val this] on top of stack. * * Note: the 'strict' flag of a reference returned by GetIdentifierReference * is ignored by GetValue. Hence we don't take a 'strict' parameter. * * The 'throw' flag is needed for implementing 'typeof' for an unreferenced * identifier. An unreference identifier in other contexts generates a * ReferenceError. */ DUK_LOCAL duk_bool_t duk__getvar_helper(duk_hthread *thr, duk_hobject *env, duk_activation *act, duk_hstring *name, duk_bool_t throw_flag) { duk__id_lookup_result ref; duk_tval tv_tmp_obj; duk_tval tv_tmp_key; duk_bool_t parents; DUK_DDD(DUK_DDDPRINT("getvar: thr=%p, env=%p, act=%p, name=%!O " "(env -> %!dO)", (void *) thr, (void *) env, (void *) act, (duk_heaphdr *) name, (duk_heaphdr *) env)); DUK_ASSERT(thr != NULL); DUK_ASSERT(name != NULL); /* env and act may be NULL */ DUK_STATS_INC(thr->heap, stats_getvar_all); DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(env); DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(name); parents = 1; /* follow parent chain */ if (duk__get_identifier_reference(thr, env, name, act, parents, &ref)) { if (ref.value) { duk_push_tval(thr, ref.value); duk_push_undefined(thr); } else { DUK_ASSERT(ref.holder != NULL); /* ref.holder is safe across the getprop call (even * with side effects) because 'env' is reachable and * ref.holder is a direct heap pointer. */ DUK_TVAL_SET_OBJECT(&tv_tmp_obj, ref.holder); DUK_TVAL_SET_STRING(&tv_tmp_key, name); (void) duk_hobject_getprop(thr, &tv_tmp_obj, &tv_tmp_key); /* [value] */ if (ref.has_this) { duk_push_hobject(thr, ref.holder); } else { duk_push_undefined(thr); } /* [value this] */ } return 1; } else { if (throw_flag) { DUK_ERROR_FMT1(thr, DUK_ERR_REFERENCE_ERROR, "identifier '%s' undefined", (const char *) DUK_HSTRING_GET_DATA(name)); DUK_WO_NORETURN(return 0;); } return 0; } } DUK_INTERNAL duk_bool_t duk_js_getvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name, duk_bool_t throw_flag) { return duk__getvar_helper(thr, env, NULL, name, throw_flag); } DUK_INTERNAL duk_bool_t duk_js_getvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name, duk_bool_t throw_flag) { DUK_ASSERT(act != NULL); return duk__getvar_helper(thr, act->lex_env, act, name, throw_flag); } /* * PUTVAR * * See E5 Sections: * 11.1.2 Identifier Reference * 10.3.1 Identifier Resolution * 11.13.1 Simple Assignment [example of where the Reference is PutValue'd] * 8.7.2 PutValue (V,W) [see especially step 3.b, undefined -> automatic global in non-strict mode] * 8.12.4 [[CanPut]] (P) * 8.12.5 [[Put]] (P) * * Note: may invalidate any valstack (or object) duk_tval pointers because * putting a value may reallocate any object or any valstack. Caller beware. */ DUK_LOCAL void duk__putvar_helper(duk_hthread *thr, duk_hobject *env, duk_activation *act, duk_hstring *name, duk_tval *val, duk_bool_t strict) { duk__id_lookup_result ref; duk_tval tv_tmp_obj; duk_tval tv_tmp_key; duk_bool_t parents; DUK_STATS_INC(thr->heap, stats_putvar_all); DUK_DDD(DUK_DDDPRINT("putvar: thr=%p, env=%p, act=%p, name=%!O, val=%p, strict=%ld " "(env -> %!dO, val -> %!T)", (void *) thr, (void *) env, (void *) act, (duk_heaphdr *) name, (void *) val, (long) strict, (duk_heaphdr *) env, (duk_tval *) val)); DUK_ASSERT(thr != NULL); DUK_ASSERT(name != NULL); DUK_ASSERT(val != NULL); /* env and act may be NULL */ DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(env); DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(name); DUK_ASSERT_REFCOUNT_NONZERO_TVAL(val); /* * In strict mode E5 protects 'eval' and 'arguments' from being * assigned to (or even declared anywhere). Attempt to do so * should result in a compile time SyntaxError. See the internal * design documentation for details. * * Thus, we should never come here, run-time, for strict code, * and name 'eval' or 'arguments'. */ DUK_ASSERT(!strict || (name != DUK_HTHREAD_STRING_EVAL(thr) && name != DUK_HTHREAD_STRING_LC_ARGUMENTS(thr))); /* * Lookup variable and update in-place if found. */ parents = 1; /* follow parent chain */ if (duk__get_identifier_reference(thr, env, name, act, parents, &ref)) { if (ref.value && (ref.attrs & DUK_PROPDESC_FLAG_WRITABLE)) { /* Update duk_tval in-place if pointer provided and the * property is writable. If the property is not writable * (immutable binding), use duk_hobject_putprop() which * will respect mutability. */ duk_tval *tv_val; tv_val = ref.value; DUK_ASSERT(tv_val != NULL); DUK_TVAL_SET_TVAL_UPDREF(thr, tv_val, val); /* side effects */ /* ref.value invalidated here */ } else { DUK_ASSERT(ref.holder != NULL); DUK_TVAL_SET_OBJECT(&tv_tmp_obj, ref.holder); DUK_TVAL_SET_STRING(&tv_tmp_key, name); (void) duk_hobject_putprop(thr, &tv_tmp_obj, &tv_tmp_key, val, strict); /* ref.value invalidated here */ } return; } /* * Not found: write to global object (non-strict) or ReferenceError * (strict); see E5 Section 8.7.2, step 3. */ if (strict) { DUK_DDD(DUK_DDDPRINT("identifier binding not found, strict => reference error")); DUK_ERROR_FMT1(thr, DUK_ERR_REFERENCE_ERROR, "identifier '%s' undefined", (const char *) DUK_HSTRING_GET_DATA(name)); DUK_WO_NORETURN(return;); } DUK_DDD(DUK_DDDPRINT("identifier binding not found, not strict => set to global")); DUK_TVAL_SET_OBJECT(&tv_tmp_obj, thr->builtins[DUK_BIDX_GLOBAL]); DUK_TVAL_SET_STRING(&tv_tmp_key, name); (void) duk_hobject_putprop(thr, &tv_tmp_obj, &tv_tmp_key, val, 0); /* 0 = no throw */ /* NB: 'val' may be invalidated here because put_value may realloc valstack, * caller beware. */ } DUK_INTERNAL void duk_js_putvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name, duk_tval *val, duk_bool_t strict) { duk__putvar_helper(thr, env, NULL, name, val, strict); } DUK_INTERNAL void duk_js_putvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name, duk_tval *val, duk_bool_t strict) { DUK_ASSERT(act != NULL); duk__putvar_helper(thr, act->lex_env, act, name, val, strict); } /* * DELVAR * * See E5 Sections: * 11.4.1 The delete operator * 10.2.1.1.5 DeleteBinding (N) [declarative environment record] * 10.2.1.2.5 DeleteBinding (N) [object environment record] * * Variable bindings established inside eval() are deletable (configurable), * other bindings are not, including variables declared in global level. * Registers are always non-deletable, and the deletion of other bindings * is controlled by the configurable flag. * * For strict mode code, the 'delete' operator should fail with a compile * time SyntaxError if applied to identifiers. Hence, no strict mode * run-time deletion of identifiers should ever happen. This function * should never be called from strict mode code! */ DUK_LOCAL duk_bool_t duk__delvar_helper(duk_hthread *thr, duk_hobject *env, duk_activation *act, duk_hstring *name) { duk__id_lookup_result ref; duk_bool_t parents; DUK_DDD(DUK_DDDPRINT("delvar: thr=%p, env=%p, act=%p, name=%!O " "(env -> %!dO)", (void *) thr, (void *) env, (void *) act, (duk_heaphdr *) name, (duk_heaphdr *) env)); DUK_ASSERT(thr != NULL); DUK_ASSERT(name != NULL); /* env and act may be NULL */ DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(name); parents = 1; /* follow parent chain */ if (duk__get_identifier_reference(thr, env, name, act, parents, &ref)) { if (ref.value && !(ref.attrs & DUK_PROPDESC_FLAG_CONFIGURABLE)) { /* Identifier found in registers (always non-deletable) * or declarative environment record and non-configurable. */ return 0; } DUK_ASSERT(ref.holder != NULL); return duk_hobject_delprop_raw(thr, ref.holder, name, 0); } /* * Not found (even in global object). * * In non-strict mode this is a silent SUCCESS (!), see E5 Section 11.4.1, * step 3.b. In strict mode this case is a compile time SyntaxError so * we should not come here. */ DUK_DDD(DUK_DDDPRINT("identifier to be deleted not found: name=%!O " "(treated as silent success)", (duk_heaphdr *) name)); return 1; } #if 0 /*unused*/ DUK_INTERNAL duk_bool_t duk_js_delvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name) { return duk__delvar_helper(thr, env, NULL, name); } #endif DUK_INTERNAL duk_bool_t duk_js_delvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name) { DUK_ASSERT(act != NULL); return duk__delvar_helper(thr, act->lex_env, act, name); } /* * DECLVAR * * See E5 Sections: * 10.4.3 Entering Function Code * 10.5 Declaration Binding Instantion * 12.2 Variable Statement * 11.1.2 Identifier Reference * 10.3.1 Identifier Resolution * * Variable declaration behavior is mainly discussed in Section 10.5, * and is not discussed in the execution semantics (Sections 11-13). * * Conceptually declarations happen when code (global, eval, function) * is entered, before any user code is executed. In practice, register- * bound identifiers are 'declared' automatically (by virtue of being * allocated to registers with the initial value 'undefined'). Other * identifiers are declared in the function prologue with this primitive. * * Since non-register bindings eventually back to an internal object's * properties, the 'prop_flags' argument is used to specify binding * type: * * - Immutable binding: set DUK_PROPDESC_FLAG_WRITABLE to false * - Non-deletable binding: set DUK_PROPDESC_FLAG_CONFIGURABLE to false * - The flag DUK_PROPDESC_FLAG_ENUMERABLE should be set, although it * doesn't really matter for internal objects * * All bindings are non-deletable mutable bindings except: * * - Declarations in eval code (mutable, deletable) * - 'arguments' binding in strict function code (immutable) * - Function name binding of a function expression (immutable) * * Declarations may go to declarative environment records (always * so for functions), but may also go to object environment records * (e.g. global code). The global object environment has special * behavior when re-declaring a function (but not a variable); see * E5.1 specification, Section 10.5, step 5.e. * * Declarations always go to the 'top-most' environment record, i.e. * we never check the record chain. It's not an error even if a * property (even an immutable or non-deletable one) of the same name * already exists. * * If a declared variable already exists, its value needs to be updated * (if possible). Returns 1 if a PUTVAR needs to be done by the caller; * otherwise returns 0. */ DUK_LOCAL duk_bool_t duk__declvar_helper(duk_hthread *thr, duk_hobject *env, duk_hstring *name, duk_tval *val, duk_small_uint_t prop_flags, duk_bool_t is_func_decl) { duk_hobject *holder; duk_bool_t parents; duk__id_lookup_result ref; duk_tval *tv; DUK_DDD(DUK_DDDPRINT("declvar: thr=%p, env=%p, name=%!O, val=%!T, prop_flags=0x%08lx, is_func_decl=%ld " "(env -> %!iO)", (void *) thr, (void *) env, (duk_heaphdr *) name, (duk_tval *) val, (unsigned long) prop_flags, (unsigned int) is_func_decl, (duk_heaphdr *) env)); DUK_ASSERT(thr != NULL); DUK_ASSERT(env != NULL); DUK_ASSERT(name != NULL); DUK_ASSERT(val != NULL); /* Note: in strict mode the compiler should reject explicit * declaration of 'eval' or 'arguments'. However, internal * bytecode may declare 'arguments' in the function prologue. * We don't bother checking (or asserting) for these now. */ /* Note: val is a stable duk_tval pointer. The caller makes * a value copy into its stack frame, so 'tv_val' is not subject * to side effects here. */ /* * Check whether already declared. * * We need to check whether the binding exists in the environment * without walking its parents. However, we still need to check * register-bound identifiers and the prototype chain of an object * environment target object. */ parents = 0; /* just check 'env' */ if (duk__get_identifier_reference(thr, env, name, NULL, parents, &ref)) { duk_int_t e_idx; duk_int_t h_idx; duk_small_uint_t flags; /* * Variable already declared, ignore re-declaration. * The only exception is the updated behavior of E5.1 for * global function declarations, E5.1 Section 10.5, step 5.e. * This behavior does not apply to global variable declarations. */ if (!(is_func_decl && env == thr->builtins[DUK_BIDX_GLOBAL_ENV])) { DUK_DDD(DUK_DDDPRINT("re-declare a binding, ignoring")); return 1; /* 1 -> needs a PUTVAR */ } /* * Special behavior in E5.1. * * Note that even though parents == 0, the conflicting property * may be an inherited property (currently our global object's * prototype is Object.prototype). Step 5.e first operates on * the existing property (which is potentially in an ancestor) * and then defines a new property in the global object (and * never modifies the ancestor). * * Also note that this logic would become even more complicated * if the conflicting property might be a virtual one. Object * prototype has no virtual properties, though. * * XXX: this is now very awkward, rework. */ DUK_DDD(DUK_DDDPRINT("re-declare a function binding in global object, " "updated E5.1 processing")); DUK_ASSERT(ref.holder != NULL); holder = ref.holder; /* holder will be set to the target object, not the actual object * where the property was found (see duk__get_identifier_reference()). */ DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(holder) == DUK_HOBJECT_CLASS_GLOBAL); DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARRAY(holder)); /* global object doesn't have array part */ /* XXX: use a helper for prototype traversal; no loop check here */ /* must be found: was found earlier, and cannot be inherited */ for (;;) { DUK_ASSERT(holder != NULL); if (duk_hobject_find_entry(thr->heap, holder, name, &e_idx, &h_idx)) { DUK_ASSERT(e_idx >= 0); break; } /* SCANBUILD: NULL pointer dereference, doesn't actually trigger, * asserted above. */ holder = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, holder); } DUK_ASSERT(holder != NULL); DUK_ASSERT(e_idx >= 0); /* SCANBUILD: scan-build produces a NULL pointer dereference warning * below; it never actually triggers because holder is actually never * NULL. */ /* ref.holder is global object, holder is the object with the * conflicting property. */ flags = DUK_HOBJECT_E_GET_FLAGS(thr->heap, holder, e_idx); if (!(flags & DUK_PROPDESC_FLAG_CONFIGURABLE)) { if (flags & DUK_PROPDESC_FLAG_ACCESSOR) { DUK_DDD(DUK_DDDPRINT("existing property is a non-configurable " "accessor -> reject")); goto fail_existing_attributes; } if (!((flags & DUK_PROPDESC_FLAG_WRITABLE) && (flags & DUK_PROPDESC_FLAG_ENUMERABLE))) { DUK_DDD(DUK_DDDPRINT("existing property is a non-configurable " "plain property which is not writable and " "enumerable -> reject")); goto fail_existing_attributes; } DUK_DDD(DUK_DDDPRINT("existing property is not configurable but " "is plain, enumerable, and writable -> " "allow redeclaration")); } if (holder == ref.holder) { /* XXX: if duk_hobject_define_property_internal() was updated * to handle a pre-existing accessor property, this would be * a simple call (like for the ancestor case). */ DUK_DDD(DUK_DDDPRINT("redefine, offending property in global object itself")); if (flags & DUK_PROPDESC_FLAG_ACCESSOR) { duk_hobject *tmp; tmp = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, holder, e_idx); DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, holder, e_idx, NULL); DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); DUK_UNREF(tmp); tmp = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, holder, e_idx); DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, holder, e_idx, NULL); DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); DUK_UNREF(tmp); } else { tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, holder, e_idx); DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); } /* Here val would be potentially invalid if we didn't make * a value copy at the caller. */ tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, holder, e_idx); DUK_TVAL_SET_TVAL(tv, val); DUK_TVAL_INCREF(thr, tv); DUK_HOBJECT_E_SET_FLAGS(thr->heap, holder, e_idx, prop_flags); DUK_DDD(DUK_DDDPRINT("updated global binding, final result: " "value -> %!T, prop_flags=0x%08lx", (duk_tval *) DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, holder, e_idx), (unsigned long) prop_flags)); } else { DUK_DDD(DUK_DDDPRINT("redefine, offending property in ancestor")); DUK_ASSERT(ref.holder == thr->builtins[DUK_BIDX_GLOBAL]); duk_push_tval(thr, val); duk_hobject_define_property_internal(thr, ref.holder, name, prop_flags); } return 0; } /* * Not found (in registers or record objects). Declare * to current variable environment. */ /* * Get holder object */ if (DUK_HOBJECT_IS_DECENV(env)) { DUK_HDECENV_ASSERT_VALID((duk_hdecenv *) env); holder = env; } else { DUK_HOBJENV_ASSERT_VALID((duk_hobjenv *) env); holder = ((duk_hobjenv *) env)->target; DUK_ASSERT(holder != NULL); } /* * Define new property * * Note: this may fail if the holder is not extensible. */ /* XXX: this is awkward as we use an internal method which doesn't handle * extensibility etc correctly. Basically we'd want to do a [[DefineOwnProperty]] * or Object.defineProperty() here. */ if (!DUK_HOBJECT_HAS_EXTENSIBLE(holder)) { goto fail_not_extensible; } duk_push_hobject(thr, holder); duk_push_hstring(thr, name); duk_push_tval(thr, val); duk_xdef_prop(thr, -3, prop_flags); /* [holder name val] -> [holder] */ duk_pop_unsafe(thr); return 0; fail_existing_attributes: fail_not_extensible: DUK_ERROR_TYPE(thr, "declaration failed"); DUK_WO_NORETURN(return 0;); } DUK_INTERNAL duk_bool_t duk_js_declvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name, duk_tval *val, duk_small_uint_t prop_flags, duk_bool_t is_func_decl) { duk_hobject *env; duk_tval tv_val_copy; DUK_ASSERT(act != NULL); /* * Make a value copy of the input val. This ensures that * side effects cannot invalidate the pointer. */ DUK_TVAL_SET_TVAL(&tv_val_copy, val); val = &tv_val_copy; /* * Delayed env creation check */ if (!act->var_env) { DUK_ASSERT(act->lex_env == NULL); duk_js_init_activation_environment_records_delayed(thr, act); /* 'act' is a stable pointer, so still OK. */ } DUK_ASSERT(act->lex_env != NULL); DUK_ASSERT(act->var_env != NULL); env = act->var_env; DUK_ASSERT(env != NULL); DUK_ASSERT(DUK_HOBJECT_IS_ENV(env)); return duk__declvar_helper(thr, env, name, val, prop_flags, is_func_decl); } /* * Lexer for source files, ToNumber() string conversions, RegExp expressions, * and JSON. * * Provides a stream of ECMAScript tokens from an UTF-8/CESU-8 buffer. The * caller can also rewind the token stream into a certain position which is * needed by the compiler part for multi-pass scanning. Tokens are * represented as duk_token structures, and contain line number information. * Token types are identified with DUK_TOK_* defines. * * Characters are decoded into a fixed size lookup window consisting of * decoded Unicode code points, with window positions past the end of the * input filled with an invalid codepoint (-1). The tokenizer can thus * perform multiple character lookups efficiently and with few sanity * checks (such as access outside the end of the input), which keeps the * tokenization code small at the cost of performance. * * Character data in tokens, such as identifier names and string literals, * is encoded into CESU-8 format on-the-fly while parsing the token in * question. The string data is made reachable to garbage collection by * placing the token-related values in value stack entries allocated for * this purpose by the caller. The characters exist in Unicode code point * form only in the fixed size lookup window, which keeps character data * expansion (of especially ASCII data) low. * * Token parsing supports the full range of Unicode characters as described * in the E5 specification. Parsing has been optimized for ASCII characters * because ordinary ECMAScript code consists almost entirely of ASCII * characters. Matching of complex Unicode codepoint sets (such as in the * IdentifierStart and IdentifierPart productions) is optimized for size, * and is done using a linear scan of a bit-packed list of ranges. This is * very slow, but should never be entered unless the source code actually * contains Unicode characters. * * ECMAScript tokenization is partially context sensitive. First, * additional future reserved words are recognized in strict mode (see E5 * Section 7.6.1.2). Second, a forward slash character ('/') can be * recognized either as starting a RegExp literal or as a division operator, * depending on context. The caller must provide necessary context flags * when requesting a new token. * * Future work: * * * Make line number tracking optional, as it consumes space. * * * Add a feature flag for disabling UTF-8 decoding of input, as most * source code is ASCII. Because of Unicode escapes written in ASCII, * this does not allow Unicode support to be removed from e.g. * duk_unicode_is_identifier_start() nor does it allow removal of CESU-8 * encoding of e.g. string literals. * * * Add a feature flag for disabling Unicode compliance of e.g. identifier * names. This allows for a build more than a kilobyte smaller, because * Unicode ranges needed by duk_unicode_is_identifier_start() and * duk_unicode_is_identifier_part() can be dropped. String literals * should still be allowed to contain escaped Unicode, so this still does * not allow removal of CESU-8 encoding of e.g. string literals. * * * Character lookup tables for codepoints above BMP could be stripped. * * * Strictly speaking, E5 specification requires that source code consists * of 16-bit code units, and if not, must be conceptually converted to * that format first. The current lexer processes Unicode code points * and allows characters outside the BMP. These should be converted to * surrogate pairs while reading the source characters into the window, * not after tokens have been formed (as is done now). However, the fix * is not trivial because two characters are decoded from one codepoint. * * * Optimize for speed as well as size. Large if-else ladders are (at * least potentially) slow. */ /* #include duk_internal.h -> already included */ /* * Various defines and file specific helper macros */ #define DUK__MAX_RE_DECESC_DIGITS 9 #define DUK__MAX_RE_QUANT_DIGITS 9 /* Does not allow e.g. 2**31-1, but one more would allow overflows of u32. */ /* whether to use macros or helper function depends on call count */ #define DUK__ISDIGIT(x) ((x) >= DUK_ASC_0 && (x) <= DUK_ASC_9) #define DUK__ISHEXDIGIT(x) duk__is_hex_digit((x)) #define DUK__ISOCTDIGIT(x) ((x) >= DUK_ASC_0 && (x) <= DUK_ASC_7) #define DUK__ISDIGIT03(x) ((x) >= DUK_ASC_0 && (x) <= DUK_ASC_3) #define DUK__ISDIGIT47(x) ((x) >= DUK_ASC_4 && (x) <= DUK_ASC_7) /* lexer character window helpers */ #define DUK__LOOKUP(lex_ctx,idx) ((lex_ctx)->window[(idx)].codepoint) #define DUK__ADVANCECHARS(lex_ctx,count) duk__advance_chars((lex_ctx), (count)) #define DUK__ADVANCEBYTES(lex_ctx,count) duk__advance_bytes((lex_ctx), (count)) #define DUK__INITBUFFER(lex_ctx) duk__initbuffer((lex_ctx)) #define DUK__APPENDBUFFER(lex_ctx,x) duk__appendbuffer((lex_ctx), (duk_codepoint_t) (x)) #define DUK__APPENDBUFFER_ASCII(lex_ctx,x) duk__appendbuffer_ascii((lex_ctx), (duk_codepoint_t) (x)) /* lookup shorthands (note: assume context variable is named 'lex_ctx') */ #define DUK__L0() DUK__LOOKUP(lex_ctx, 0) #define DUK__L1() DUK__LOOKUP(lex_ctx, 1) #define DUK__L2() DUK__LOOKUP(lex_ctx, 2) #define DUK__L3() DUK__LOOKUP(lex_ctx, 3) #define DUK__L4() DUK__LOOKUP(lex_ctx, 4) #define DUK__L5() DUK__LOOKUP(lex_ctx, 5) /* packed advance/token number macro used by multiple functions */ #define DUK__ADVTOK(advbytes,tok) ((((advbytes) * sizeof(duk_lexer_codepoint)) << 8) + (tok)) /* * Advance lookup window by N characters, filling in new characters as * necessary. After returning caller is guaranteed a character window of * at least DUK_LEXER_WINDOW_SIZE characters. * * The main function duk__advance_bytes() is called at least once per every * token so it has a major lexer/compiler performance impact. There are two * variants for the main duk__advance_bytes() algorithm: a sliding window * approach which is slightly faster at the cost of larger code footprint, * and a simple copying one. * * Decoding directly from the source string would be another lexing option. * But the lookup window based approach has the advantage of hiding the * source string and its encoding effectively which gives more flexibility * going forward to e.g. support chunked streaming of source from flash. * * Decodes UTF-8/CESU-8 leniently with support for code points from U+0000 to * U+10FFFF, causing an error if the input is unparseable. Leniency means: * * * Unicode code point validation is intentionally not performed, * except to check that the codepoint does not exceed 0x10ffff. * * * In particular, surrogate pairs are allowed and not combined, which * allows source files to represent all SourceCharacters with CESU-8. * Broken surrogate pairs are allowed, as ECMAScript does not mandate * their validation. * * * Allow non-shortest UTF-8 encodings. * * Leniency here causes few security concerns because all character data is * decoded into Unicode codepoints before lexer processing, and is then * re-encoded into CESU-8. The source can be parsed as strict UTF-8 with * a compiler option. However, ECMAScript source characters include -all- * 16-bit unsigned integer codepoints, so leniency seems to be appropriate. * * Note that codepoints above the BMP are not strictly SourceCharacters, * but the lexer still accepts them as such. Before ending up in a string * or an identifier name, codepoints above BMP are converted into surrogate * pairs and then CESU-8 encoded, resulting in 16-bit Unicode data as * expected by ECMAScript. * * An alternative approach to dealing with invalid or partial sequences * would be to skip them and replace them with e.g. the Unicode replacement * character U+FFFD. This has limited utility because a replacement character * will most likely cause a parse error, unless it occurs inside a string. * Further, ECMAScript source is typically pure ASCII. * * See: * * http://en.wikipedia.org/wiki/UTF-8 * http://en.wikipedia.org/wiki/CESU-8 * http://tools.ietf.org/html/rfc3629 * http://en.wikipedia.org/wiki/UTF-8#Invalid_byte_sequences * * Future work: * * * Reject other invalid Unicode sequences (see Wikipedia entry for examples) * in strict UTF-8 mode. * * * Size optimize. An attempt to use a 16-byte lookup table for the first * byte resulted in a code increase though. * * * Is checking against maximum 0x10ffff really useful? 4-byte encoding * imposes a certain limit anyway. * * * Support chunked streaming of source code. Can be implemented either * by streaming chunks of bytes or chunks of codepoints. */ #if defined(DUK_USE_LEXER_SLIDING_WINDOW) DUK_LOCAL void duk__fill_lexer_buffer(duk_lexer_ctx *lex_ctx, duk_small_uint_t start_offset_bytes) { duk_lexer_codepoint *cp, *cp_end; duk_ucodepoint_t x; duk_small_uint_t contlen; const duk_uint8_t *p, *p_end; #if defined(DUK_USE_STRICT_UTF8_SOURCE) duk_ucodepoint_t mincp; #endif duk_int_t input_line; /* Use temporaries and update lex_ctx only when finished. */ input_line = lex_ctx->input_line; p = lex_ctx->input + lex_ctx->input_offset; p_end = lex_ctx->input + lex_ctx->input_length; cp = (duk_lexer_codepoint *) (void *) ((duk_uint8_t *) lex_ctx->buffer + start_offset_bytes); cp_end = lex_ctx->buffer + DUK_LEXER_BUFFER_SIZE; for (; cp != cp_end; cp++) { cp->offset = (duk_size_t) (p - lex_ctx->input); cp->line = input_line; /* XXX: potential issue with signed pointers, p_end < p. */ if (DUK_UNLIKELY(p >= p_end)) { /* If input_offset were assigned a negative value, it would * result in a large positive value. Most likely it would be * larger than input_length and be caught here. In any case * no memory unsafe behavior would happen. */ cp->codepoint = -1; continue; } x = (duk_ucodepoint_t) (*p++); /* Fast path. */ if (DUK_LIKELY(x < 0x80UL)) { DUK_ASSERT(x != 0x2028UL && x != 0x2029UL); /* not LS/PS */ if (DUK_UNLIKELY(x <= 0x000dUL)) { if ((x == 0x000aUL) || ((x == 0x000dUL) && (p >= p_end || *p != 0x000aUL))) { /* lookup for 0x000a above assumes shortest encoding now */ /* E5 Section 7.3, treat the following as newlines: * LF * CR [not followed by LF] * LS * PS * * For CR LF, CR is ignored if it is followed by LF, and the LF will bump * the line number. */ input_line++; } } cp->codepoint = (duk_codepoint_t) x; continue; } /* Slow path. */ if (x < 0xc0UL) { /* 10xx xxxx -> invalid */ goto error_encoding; } else if (x < 0xe0UL) { /* 110x xxxx 10xx xxxx */ contlen = 1; #if defined(DUK_USE_STRICT_UTF8_SOURCE) mincp = 0x80UL; #endif x = x & 0x1fUL; } else if (x < 0xf0UL) { /* 1110 xxxx 10xx xxxx 10xx xxxx */ contlen = 2; #if defined(DUK_USE_STRICT_UTF8_SOURCE) mincp = 0x800UL; #endif x = x & 0x0fUL; } else if (x < 0xf8UL) { /* 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx */ contlen = 3; #if defined(DUK_USE_STRICT_UTF8_SOURCE) mincp = 0x10000UL; #endif x = x & 0x07UL; } else { /* no point in supporting encodings of 5 or more bytes */ goto error_encoding; } DUK_ASSERT(p_end >= p); if ((duk_size_t) contlen > (duk_size_t) (p_end - p)) { goto error_clipped; } while (contlen > 0) { duk_small_uint_t y; y = *p++; if ((y & 0xc0U) != 0x80U) { /* check that byte has the form 10xx xxxx */ goto error_encoding; } x = x << 6; x += y & 0x3fUL; contlen--; } /* check final character validity */ if (x > 0x10ffffUL) { goto error_encoding; } #if defined(DUK_USE_STRICT_UTF8_SOURCE) if (x < mincp || (x >= 0xd800UL && x <= 0xdfffUL) || x == 0xfffeUL) { goto error_encoding; } #endif DUK_ASSERT(x != 0x000aUL && x != 0x000dUL); if ((x == 0x2028UL) || (x == 0x2029UL)) { input_line++; } cp->codepoint = (duk_codepoint_t) x; } lex_ctx->input_offset = (duk_size_t) (p - lex_ctx->input); lex_ctx->input_line = input_line; return; error_clipped: /* clipped codepoint */ error_encoding: /* invalid codepoint encoding or codepoint */ lex_ctx->input_offset = (duk_size_t) (p - lex_ctx->input); lex_ctx->input_line = input_line; DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_SOURCE_DECODE_FAILED); DUK_WO_NORETURN(return;); } DUK_LOCAL void duk__advance_bytes(duk_lexer_ctx *lex_ctx, duk_small_uint_t count_bytes) { duk_small_uint_t used_bytes, avail_bytes; DUK_ASSERT_DISABLE(count_bytes >= 0); /* unsigned */ DUK_ASSERT(count_bytes <= (duk_small_uint_t) (DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint))); DUK_ASSERT(lex_ctx->window >= lex_ctx->buffer); DUK_ASSERT(lex_ctx->window < lex_ctx->buffer + DUK_LEXER_BUFFER_SIZE); DUK_ASSERT((duk_uint8_t *) lex_ctx->window + count_bytes <= (duk_uint8_t *) lex_ctx->buffer + DUK_LEXER_BUFFER_SIZE * sizeof(duk_lexer_codepoint)); /* Zero 'count' is also allowed to make call sites easier. * Arithmetic in bytes generates better code in GCC. */ lex_ctx->window = (duk_lexer_codepoint *) (void *) ((duk_uint8_t *) lex_ctx->window + count_bytes); /* avoid multiply */ used_bytes = (duk_small_uint_t) ((duk_uint8_t *) lex_ctx->window - (duk_uint8_t *) lex_ctx->buffer); avail_bytes = DUK_LEXER_BUFFER_SIZE * sizeof(duk_lexer_codepoint) - used_bytes; if (avail_bytes < (duk_small_uint_t) (DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint))) { /* Not enough data to provide a full window, so "scroll" window to * start of buffer and fill up the rest. */ duk_memmove((void *) lex_ctx->buffer, (const void *) lex_ctx->window, (size_t) avail_bytes); lex_ctx->window = lex_ctx->buffer; duk__fill_lexer_buffer(lex_ctx, avail_bytes); } } DUK_LOCAL void duk__init_lexer_window(duk_lexer_ctx *lex_ctx) { lex_ctx->window = lex_ctx->buffer; duk__fill_lexer_buffer(lex_ctx, 0); } #else /* DUK_USE_LEXER_SLIDING_WINDOW */ DUK_LOCAL duk_codepoint_t duk__read_char(duk_lexer_ctx *lex_ctx) { duk_ucodepoint_t x; duk_small_uint_t len; duk_small_uint_t i; const duk_uint8_t *p; #if defined(DUK_USE_STRICT_UTF8_SOURCE) duk_ucodepoint_t mincp; #endif duk_size_t input_offset; input_offset = lex_ctx->input_offset; if (DUK_UNLIKELY(input_offset >= lex_ctx->input_length)) { /* If input_offset were assigned a negative value, it would * result in a large positive value. Most likely it would be * larger than input_length and be caught here. In any case * no memory unsafe behavior would happen. */ return -1; } p = lex_ctx->input + input_offset; x = (duk_ucodepoint_t) (*p); if (DUK_LIKELY(x < 0x80UL)) { /* 0xxx xxxx -> fast path */ /* input offset tracking */ lex_ctx->input_offset++; DUK_ASSERT(x != 0x2028UL && x != 0x2029UL); /* not LS/PS */ if (DUK_UNLIKELY(x <= 0x000dUL)) { if ((x == 0x000aUL) || ((x == 0x000dUL) && (lex_ctx->input_offset >= lex_ctx->input_length || lex_ctx->input[lex_ctx->input_offset] != 0x000aUL))) { /* lookup for 0x000a above assumes shortest encoding now */ /* E5 Section 7.3, treat the following as newlines: * LF * CR [not followed by LF] * LS * PS * * For CR LF, CR is ignored if it is followed by LF, and the LF will bump * the line number. */ lex_ctx->input_line++; } } return (duk_codepoint_t) x; } /* Slow path. */ if (x < 0xc0UL) { /* 10xx xxxx -> invalid */ goto error_encoding; } else if (x < 0xe0UL) { /* 110x xxxx 10xx xxxx */ len = 2; #if defined(DUK_USE_STRICT_UTF8_SOURCE) mincp = 0x80UL; #endif x = x & 0x1fUL; } else if (x < 0xf0UL) { /* 1110 xxxx 10xx xxxx 10xx xxxx */ len = 3; #if defined(DUK_USE_STRICT_UTF8_SOURCE) mincp = 0x800UL; #endif x = x & 0x0fUL; } else if (x < 0xf8UL) { /* 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx */ len = 4; #if defined(DUK_USE_STRICT_UTF8_SOURCE) mincp = 0x10000UL; #endif x = x & 0x07UL; } else { /* no point in supporting encodings of 5 or more bytes */ goto error_encoding; } DUK_ASSERT(lex_ctx->input_length >= lex_ctx->input_offset); if ((duk_size_t) len > (duk_size_t) (lex_ctx->input_length - lex_ctx->input_offset)) { goto error_clipped; } p++; for (i = 1; i < len; i++) { duk_small_uint_t y; y = *p++; if ((y & 0xc0U) != 0x80U) { /* check that byte has the form 10xx xxxx */ goto error_encoding; } x = x << 6; x += y & 0x3fUL; } /* check final character validity */ if (x > 0x10ffffUL) { goto error_encoding; } #if defined(DUK_USE_STRICT_UTF8_SOURCE) if (x < mincp || (x >= 0xd800UL && x <= 0xdfffUL) || x == 0xfffeUL) { goto error_encoding; } #endif /* input offset tracking */ lex_ctx->input_offset += len; /* line tracking */ DUK_ASSERT(x != 0x000aUL && x != 0x000dUL); if ((x == 0x2028UL) || (x == 0x2029UL)) { lex_ctx->input_line++; } return (duk_codepoint_t) x; error_clipped: /* clipped codepoint */ error_encoding: /* invalid codepoint encoding or codepoint */ DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_SOURCE_DECODE_FAILED); DUK_WO_NORETURN(return 0;); } DUK_LOCAL void duk__advance_bytes(duk_lexer_ctx *lex_ctx, duk_small_uint_t count_bytes) { duk_small_uint_t keep_bytes; duk_lexer_codepoint *cp, *cp_end; DUK_ASSERT_DISABLE(count_bytes >= 0); /* unsigned */ DUK_ASSERT(count_bytes <= (duk_small_uint_t) (DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint))); /* Zero 'count' is also allowed to make call sites easier. */ keep_bytes = DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint) - count_bytes; duk_memmove((void *) lex_ctx->window, (const void *) ((duk_uint8_t *) lex_ctx->window + count_bytes), (size_t) keep_bytes); cp = (duk_lexer_codepoint *) ((duk_uint8_t *) lex_ctx->window + keep_bytes); cp_end = lex_ctx->window + DUK_LEXER_WINDOW_SIZE; for (; cp != cp_end; cp++) { cp->offset = lex_ctx->input_offset; cp->line = lex_ctx->input_line; cp->codepoint = duk__read_char(lex_ctx); } } DUK_LOCAL void duk__init_lexer_window(duk_lexer_ctx *lex_ctx) { /* Call with count == DUK_LEXER_WINDOW_SIZE to fill buffer initially. */ duk__advance_bytes(lex_ctx, DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint)); /* fill window */ } #endif /* DUK_USE_LEXER_SLIDING_WINDOW */ DUK_LOCAL void duk__advance_chars(duk_lexer_ctx *lex_ctx, duk_small_uint_t count_chars) { duk__advance_bytes(lex_ctx, count_chars * sizeof(duk_lexer_codepoint)); } /* * (Re)initialize the temporary byte buffer. May be called extra times * with little impact. */ DUK_LOCAL void duk__initbuffer(duk_lexer_ctx *lex_ctx) { /* Reuse buffer as is unless buffer has grown large. */ if (DUK_HBUFFER_DYNAMIC_GET_SIZE(lex_ctx->buf) < DUK_LEXER_TEMP_BUF_LIMIT) { /* Keep current size */ } else { duk_hbuffer_resize(lex_ctx->thr, lex_ctx->buf, DUK_LEXER_TEMP_BUF_LIMIT); } DUK_BW_INIT_WITHBUF(lex_ctx->thr, &lex_ctx->bw, lex_ctx->buf); } /* * Append a Unicode codepoint to the temporary byte buffer. Performs * CESU-8 surrogate pair encoding for codepoints above the BMP. * Existing surrogate pairs are allowed and also encoded into CESU-8. */ DUK_LOCAL void duk__appendbuffer(duk_lexer_ctx *lex_ctx, duk_codepoint_t x) { /* * Since character data is only generated by decoding the source or by * the compiler itself, we rely on the input codepoints being correct * and avoid a check here. * * Character data can also come here through decoding of Unicode * escapes ("\udead\ubeef") so all 16-but unsigned values can be * present, even when the source file itself is strict UTF-8. */ DUK_ASSERT(x >= 0 && x <= 0x10ffffL); DUK_BW_WRITE_ENSURE_CESU8(lex_ctx->thr, &lex_ctx->bw, (duk_ucodepoint_t) x); } DUK_LOCAL void duk__appendbuffer_ascii(duk_lexer_ctx *lex_ctx, duk_codepoint_t x) { /* ASCII characters can be emitted as a single byte without encoding * which matters for some fast paths. */ DUK_ASSERT(x >= 0 && x <= 0x7f); DUK_BW_WRITE_ENSURE_U8(lex_ctx->thr, &lex_ctx->bw, (duk_uint8_t) x); } /* * Intern the temporary byte buffer into a valstack slot * (in practice, slot1 or slot2). */ DUK_LOCAL duk_hstring *duk__internbuffer(duk_lexer_ctx *lex_ctx, duk_idx_t valstack_idx) { DUK_ASSERT(valstack_idx == lex_ctx->slot1_idx || valstack_idx == lex_ctx->slot2_idx); DUK_BW_PUSH_AS_STRING(lex_ctx->thr, &lex_ctx->bw); duk_replace(lex_ctx->thr, valstack_idx); return duk_known_hstring(lex_ctx->thr, valstack_idx); } /* * Init lexer context */ DUK_INTERNAL void duk_lexer_initctx(duk_lexer_ctx *lex_ctx) { DUK_ASSERT(lex_ctx != NULL); duk_memzero(lex_ctx, sizeof(*lex_ctx)); #if defined(DUK_USE_EXPLICIT_NULL_INIT) #if defined(DUK_USE_LEXER_SLIDING_WINDOW) lex_ctx->window = NULL; #endif lex_ctx->thr = NULL; lex_ctx->input = NULL; lex_ctx->buf = NULL; #endif } /* * Set lexer input position and reinitialize lookup window. */ DUK_INTERNAL void duk_lexer_getpoint(duk_lexer_ctx *lex_ctx, duk_lexer_point *pt) { pt->offset = lex_ctx->window[0].offset; pt->line = lex_ctx->window[0].line; } DUK_INTERNAL void duk_lexer_setpoint(duk_lexer_ctx *lex_ctx, duk_lexer_point *pt) { DUK_ASSERT_DISABLE(pt->offset >= 0); /* unsigned */ DUK_ASSERT(pt->line >= 1); lex_ctx->input_offset = pt->offset; lex_ctx->input_line = pt->line; duk__init_lexer_window(lex_ctx); } /* * Lexing helpers */ /* Numeric value of a hex digit (also covers octal and decimal digits) or * -1 if not a valid hex digit. */ DUK_LOCAL duk_codepoint_t duk__hexval_validate(duk_codepoint_t x) { duk_small_int_t t; /* Here 'x' is a Unicode codepoint */ if (DUK_LIKELY(x >= 0 && x <= 0xff)) { t = duk_hex_dectab[x]; if (DUK_LIKELY(t >= 0)) { return t; } } return -1; } /* Just a wrapper for call sites where 'x' is known to be valid so * we assert for it before decoding. */ DUK_LOCAL duk_codepoint_t duk__hexval(duk_codepoint_t x) { duk_codepoint_t ret; DUK_ASSERT((x >= DUK_ASC_0 && x <= DUK_ASC_9) || (x >= DUK_ASC_LC_A && x <= DUK_ASC_LC_F) || (x >= DUK_ASC_UC_A && x <= DUK_ASC_UC_F)); ret = duk__hexval_validate(x); DUK_ASSERT(ret >= 0 && ret <= 15); return ret; } /* having this as a separate function provided a size benefit */ DUK_LOCAL duk_bool_t duk__is_hex_digit(duk_codepoint_t x) { if (DUK_LIKELY(x >= 0 && x <= 0xff)) { return (duk_hex_dectab[x] >= 0); } return 0; } /* Parse a Unicode escape of the form \xHH, \uHHHH, or \u{H+}. Shared by * source and RegExp parsing. */ DUK_LOCAL duk_codepoint_t duk__lexer_parse_escape(duk_lexer_ctx *lex_ctx, duk_bool_t allow_es6) { duk_small_int_t digits; /* Initial value 2 or 4 for fixed length escapes, 0 for ES2015 \u{H+}. */ duk_codepoint_t escval; duk_codepoint_t x; duk_small_uint_t adv; DUK_ASSERT(DUK__L0() == DUK_ASC_BACKSLASH); /* caller responsibilities */ DUK_ASSERT(DUK__L1() == DUK_ASC_LC_X || DUK__L1() == DUK_ASC_LC_U); DUK_UNREF(allow_es6); adv = 2; digits = 2; if (DUK__L1() == DUK_ASC_LC_U) { digits = 4; #if defined(DUK_USE_ES6_UNICODE_ESCAPE) if (DUK__L2() == DUK_ASC_LCURLY && allow_es6) { digits = 0; adv = 3; } #endif } DUK__ADVANCECHARS(lex_ctx, adv); escval = 0; for (;;) { /* One of the escape forms: \xHH, \uHHHH, \u{H+}. * The 'digits' variable tracks parsing state and is * initialized to: * * \xHH 2 * \uHH 4 * \u{H+} 0 first time, updated to -1 to indicate * at least one digit has been parsed * * Octal parsing is handled separately because it can be * done with fixed lookahead and also has validation * rules which depend on the escape length (which is * variable). * * We don't need a specific check for x < 0 (end of * input) or duk_unicode_is_line_terminator(x) * because the 'dig' decode will fail and lead to a * SyntaxError. */ duk_codepoint_t dig; x = DUK__L0(); DUK__ADVANCECHARS(lex_ctx, 1); dig = duk__hexval_validate(x); if (digits > 0) { digits--; if (dig < 0) { goto fail_escape; } DUK_ASSERT(dig >= 0x00 && dig <= 0x0f); escval = (escval << 4) + dig; if (digits == 0) { DUK_ASSERT(escval >= 0 && escval <= 0xffffL); break; } } else { #if defined(DUK_USE_ES6_UNICODE_ESCAPE) DUK_ASSERT(digits == 0 /* first time */ || digits == -1 /* others */); if (dig >= 0) { DUK_ASSERT(dig >= 0x00 && dig <= 0x0f); escval = (escval << 4) + dig; if (escval > 0x10ffffL) { goto fail_escape; } } else if (x == DUK_ASC_RCURLY) { if (digits == 0) { /* Empty escape, \u{}. */ goto fail_escape; } DUK_ASSERT(escval >= 0 && escval <= 0x10ffffL); break; } else { goto fail_escape; } digits = -1; /* Indicate we have at least one digit. */ #else /* DUK_USE_ES6_UNICODE_ESCAPE */ DUK_ASSERT(0); /* Never happens if \u{H+} support disabled. */ #endif /* DUK_USE_ES6_UNICODE_ESCAPE */ } } return escval; fail_escape: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_ESCAPE); DUK_WO_NORETURN(return 0;); } /* Parse legacy octal escape of the form \N{1,3}, e.g. \0, \5, \0377. Maximum * allowed value is \0377 (U+00FF), longest match is used. Used for both string * RegExp octal escape parsing. Window[0] must be the slash '\' and the first * digit must already be validated to be in [0-9] by the caller. */ DUK_LOCAL duk_codepoint_t duk__lexer_parse_legacy_octal(duk_lexer_ctx *lex_ctx, duk_small_uint_t *out_adv, duk_bool_t reject_annex_b) { duk_codepoint_t cp; duk_small_uint_t lookup_idx; duk_small_uint_t adv; duk_codepoint_t tmp; DUK_ASSERT(out_adv != NULL); DUK_ASSERT(DUK__LOOKUP(lex_ctx, 0) == DUK_ASC_BACKSLASH); DUK_ASSERT(DUK__LOOKUP(lex_ctx, 1) >= DUK_ASC_0 && DUK__LOOKUP(lex_ctx, 1) <= DUK_ASC_9); cp = 0; tmp = 0; for (lookup_idx = 1; lookup_idx <= 3; lookup_idx++) { DUK_DDD(DUK_DDDPRINT("lookup_idx=%ld, cp=%ld", (long) lookup_idx, (long) cp)); tmp = DUK__LOOKUP(lex_ctx, lookup_idx); if (tmp < DUK_ASC_0 || tmp > DUK_ASC_7) { /* No more valid digits. */ break; } tmp = (cp << 3) + (tmp - DUK_ASC_0); if (tmp > 0xff) { /* Three digit octal escapes above \377 (= 0xff) * are not allowed. */ break; } cp = tmp; } DUK_DDD(DUK_DDDPRINT("final lookup_idx=%ld, cp=%ld", (long) lookup_idx, (long) cp)); adv = lookup_idx; if (lookup_idx == 1) { DUK_DDD(DUK_DDDPRINT("\\8 or \\9 -> treat as literal, accept in strict mode too")); DUK_ASSERT(tmp == DUK_ASC_8 || tmp == DUK_ASC_9); cp = tmp; adv++; /* correction to above, eat offending character */ } else if (lookup_idx == 2 && cp == 0) { /* Note: 'foo\0bar' is OK in strict mode, but 'foo\00bar' is not. * It won't be interpreted as 'foo\u{0}0bar' but as a SyntaxError. */ DUK_DDD(DUK_DDDPRINT("\\0 -> accept in strict mode too")); } else { /* This clause also handles non-shortest zero, e.g. \00. */ if (reject_annex_b) { DUK_DDD(DUK_DDDPRINT("non-zero octal literal %ld -> reject in strict-mode", (long) cp)); cp = -1; } else { DUK_DDD(DUK_DDDPRINT("non-zero octal literal %ld -> accepted", (long) cp)); DUK_ASSERT(cp >= 0 && cp <= 0xff); } } *out_adv = adv; DUK_ASSERT((cp >= 0 && cp <= 0xff) || (cp == -1 && reject_annex_b)); return cp; } /* XXX: move strict mode to lex_ctx? */ DUK_LOCAL void duk__lexer_parse_string_literal(duk_lexer_ctx *lex_ctx, duk_token *out_token, duk_small_int_t quote, duk_bool_t strict_mode) { duk_small_uint_t adv; for (adv = 1 /* initial quote */ ;;) { duk_codepoint_t x; DUK__ADVANCECHARS(lex_ctx, adv); /* eat opening quote on first loop */ x = DUK__L0(); adv = 1; if (x == quote) { DUK__ADVANCECHARS(lex_ctx, 1); /* eat closing quote */ break; } else if (x == '\\') { /* DUK__L0 -> '\' char * DUK__L1 ... DUK__L5 -> more lookup */ duk_small_int_t emitcp = -1; x = DUK__L1(); /* How much to advance before next loop. */ adv = 2; /* note: long live range */ switch (x) { case '\'': emitcp = 0x0027; break; case '"': emitcp = 0x0022; break; case '\\': emitcp = 0x005c; break; case 'b': emitcp = 0x0008; break; case 'f': emitcp = 0x000c; break; case 'n': emitcp = 0x000a; break; case 'r': emitcp = 0x000d; break; case 't': emitcp = 0x0009; break; case 'v': emitcp = 0x000b; break; case 'x': case 'u': { duk_codepoint_t esc_cp; esc_cp = duk__lexer_parse_escape(lex_ctx, 1 /*allow_es6*/); DUK__APPENDBUFFER(lex_ctx, esc_cp); adv = 0; break; } default: { if (duk_unicode_is_line_terminator(x)) { /* line continuation */ if (x == 0x000d && DUK__L2() == 0x000a) { /* CR LF again a special case */ adv = 3; /* line terminator, CR, LF */ } } else if (DUK__ISDIGIT(x)) { /* * Octal escape or zero escape: * \0 (lookahead not OctalDigit) * \1 ... \7 (lookahead not OctalDigit) * \ZeroToThree OctalDigit (lookahead not OctalDigit) * \FourToSeven OctalDigit (no lookahead restrictions) * \ZeroToThree OctalDigit OctalDigit (no lookahead restrictions) * * Zero escape is part of the standard syntax. Octal escapes are * defined in E5 Section B.1.2, and are only allowed in non-strict mode. * Any other productions starting with a decimal digit are invalid * but are in practice treated like identity escapes. * * Parse octal (up to 3 digits) from the lookup window. */ emitcp = duk__lexer_parse_legacy_octal(lex_ctx, &adv, strict_mode /*reject_annex_b*/); if (emitcp < 0) { goto fail_escape; } } else if (x < 0) { goto fail_unterminated; } else { /* escaped NonEscapeCharacter */ DUK__APPENDBUFFER(lex_ctx, x); } } /* end default clause */ } /* end switch */ /* Shared handling for single codepoint escapes. */ if (emitcp >= 0) { DUK__APPENDBUFFER(lex_ctx, emitcp); } /* Track number of escapes; count not really needed but directive * prologues need to detect whether there were any escapes or line * continuations or not. */ out_token->num_escapes++; } else if (x >= 0x20 && x <= 0x7f) { /* Fast path for ASCII case, avoids line terminator * check and CESU-8 encoding. */ DUK_ASSERT(x >= 0); DUK_ASSERT(!duk_unicode_is_line_terminator(x)); DUK_ASSERT(x != quote); DUK_ASSERT(x != DUK_ASC_BACKSLASH); DUK__APPENDBUFFER_ASCII(lex_ctx, x); } else if (x < 0 || duk_unicode_is_line_terminator(x)) { goto fail_unterminated; } else { /* Character which is part of the string but wasn't handled * by the fast path. */ DUK__APPENDBUFFER(lex_ctx, x); } } /* string parse loop */ return; fail_escape: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_ESCAPE); DUK_WO_NORETURN(return;); fail_unterminated: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_UNTERMINATED_STRING); DUK_WO_NORETURN(return;); } /* Skip to end-of-line (or end-of-file), used for single line comments. */ DUK_LOCAL void duk__lexer_skip_to_endofline(duk_lexer_ctx *lex_ctx) { for (;;) { duk_codepoint_t x; x = DUK__L0(); if (x < 0 || duk_unicode_is_line_terminator(x)) { break; } DUK__ADVANCECHARS(lex_ctx, 1); } } /* * Parse ECMAScript source InputElementDiv or InputElementRegExp * (E5 Section 7), skipping whitespace, comments, and line terminators. * * Possible results are: * (1) a token * (2) a line terminator (skipped) * (3) a comment (skipped) * (4) EOF * * White space is automatically skipped from the current position (but * not after the input element). If input has already ended, returns * DUK_TOK_EOF indefinitely. If a parse error occurs, uses an DUK_ERROR() * macro call (and hence a longjmp through current heap longjmp context). * Comments and line terminator tokens are automatically skipped. * * The input element being matched is determined by regexp_mode; if set, * parses a InputElementRegExp, otherwise a InputElementDiv. The * difference between these are handling of productions starting with a * forward slash. * * If strict_mode is set, recognizes additional future reserved words * specific to strict mode, and refuses to parse octal literals. * * The matching strategy below is to (currently) use a six character * lookup window to quickly determine which production is the -longest- * matching one, and then parse that. The top-level if-else clauses * match the first character, and the code blocks for each clause * handle -all- alternatives for that first character. ECMAScript * specification uses the "longest match wins" semantics, so the order * of the if-clauses matters. * * Misc notes: * * * ECMAScript numeric literals do not accept a sign character. * Consequently e.g. "-1.0" is parsed as two tokens: a negative * sign and a positive numeric literal. The compiler performs * the negation during compilation, so this has no adverse impact. * * * There is no token for "undefined": it is just a value available * from the global object (or simply established by doing a reference * to an undefined value). * * * Some contexts want Identifier tokens, which are IdentifierNames * excluding reserved words, while some contexts want IdentifierNames * directly. In the latter case e.g. "while" is interpreted as an * identifier name, not a DUK_TOK_WHILE token. The solution here is * to provide both token types: DUK_TOK_WHILE goes to 't' while * DUK_TOK_IDENTIFIER goes to 't_nores', and 'slot1' always contains * the identifier / keyword name. * * * Directive prologue needs to identify string literals such as * "use strict" and 'use strict', which are sensitive to line * continuations and escape sequences. For instance, "use\u0020strict" * is a valid directive but is distinct from "use strict". The solution * here is to decode escapes while tokenizing, but to keep track of the * number of escapes. Directive detection can then check that the * number of escapes is zero. * * * Multi-line comments with one or more internal LineTerminator are * treated like a line terminator to comply with automatic semicolon * insertion. */ DUK_INTERNAL void duk_lexer_parse_js_input_element(duk_lexer_ctx *lex_ctx, duk_token *out_token, duk_bool_t strict_mode, duk_bool_t regexp_mode) { duk_codepoint_t x; /* temporary, must be signed and 32-bit to hold Unicode code points */ duk_small_uint_t advtok = 0; /* (advance << 8) + token_type, updated at function end, * init is unnecessary but suppresses "may be used uninitialized" warnings. */ duk_bool_t got_lineterm = 0; /* got lineterm preceding non-whitespace, non-lineterm token */ if (++lex_ctx->token_count >= lex_ctx->token_limit) { goto fail_token_limit; } out_token->t = DUK_TOK_EOF; out_token->t_nores = DUK_TOK_INVALID; /* marker: copy t if not changed */ #if 0 /* not necessary to init, disabled for faster parsing */ out_token->num = DUK_DOUBLE_NAN; out_token->str1 = NULL; out_token->str2 = NULL; #endif out_token->num_escapes = 0; /* out_token->lineterm set by caller */ /* This would be nice, but parsing is faster without resetting the * value slots. The only side effect is that references to temporary * string values may linger until lexing is finished; they're then * freed normally. */ #if 0 duk_to_undefined(lex_ctx->thr, lex_ctx->slot1_idx); duk_to_undefined(lex_ctx->thr, lex_ctx->slot2_idx); #endif /* 'advtok' indicates how much to advance and which token id to assign * at the end. This shared functionality minimizes code size. All * code paths are required to set 'advtok' to some value, so no default * init value is used. Code paths calling DUK_ERROR() never return so * they don't need to set advtok. */ /* * Matching order: * * Punctuator first chars, also covers comments, regexps * LineTerminator * Identifier or reserved word, also covers null/true/false literals * NumericLiteral * StringLiteral * EOF * * The order does not matter as long as the longest match is * always correctly identified. There are order dependencies * in the clauses, so it's not trivial to convert to a switch. */ restart_lineupdate: out_token->start_line = lex_ctx->window[0].line; restart: out_token->start_offset = lex_ctx->window[0].offset; x = DUK__L0(); switch (x) { case DUK_ASC_SPACE: case DUK_ASC_HT: /* fast paths for space and tab */ DUK__ADVANCECHARS(lex_ctx, 1); goto restart; case DUK_ASC_LF: /* LF line terminator; CR LF and Unicode lineterms are handled in slow path */ DUK__ADVANCECHARS(lex_ctx, 1); got_lineterm = 1; goto restart_lineupdate; #if defined(DUK_USE_SHEBANG_COMMENTS) case DUK_ASC_HASH: /* '#' */ if (DUK__L1() == DUK_ASC_EXCLAMATION && lex_ctx->window[0].offset == 0 && (lex_ctx->flags & DUK_COMPILE_SHEBANG)) { /* "Shebang" comment ('#! ...') on first line. */ /* DUK__ADVANCECHARS(lex_ctx, 2) would be correct here, but not necessary */ duk__lexer_skip_to_endofline(lex_ctx); goto restart; /* line terminator will be handled on next round */ } goto fail_token; #endif /* DUK_USE_SHEBANG_COMMENTS */ case DUK_ASC_SLASH: /* '/' */ if (DUK__L1() == DUK_ASC_SLASH) { /* * E5 Section 7.4, allow SourceCharacter (which is any 16-bit * code point). */ /* DUK__ADVANCECHARS(lex_ctx, 2) would be correct here, but not necessary */ duk__lexer_skip_to_endofline(lex_ctx); goto restart; /* line terminator will be handled on next round */ } else if (DUK__L1() == DUK_ASC_STAR) { /* * E5 Section 7.4. If the multi-line comment contains a newline, * it is treated like a single line terminator for automatic * semicolon insertion. */ duk_bool_t last_asterisk = 0; DUK__ADVANCECHARS(lex_ctx, 2); for (;;) { x = DUK__L0(); if (x < 0) { goto fail_unterm_comment; } DUK__ADVANCECHARS(lex_ctx, 1); if (last_asterisk && x == DUK_ASC_SLASH) { break; } if (duk_unicode_is_line_terminator(x)) { got_lineterm = 1; } last_asterisk = (x == DUK_ASC_STAR); } goto restart_lineupdate; } else if (regexp_mode) { #if defined(DUK_USE_REGEXP_SUPPORT) /* * "/" followed by something in regexp mode. See E5 Section 7.8.5. * * RegExp parsing is a bit complex. First, the regexp body is delimited * by forward slashes, but the body may also contain forward slashes as * part of an escape sequence or inside a character class (delimited by * square brackets). A mini state machine is used to implement these. * * Further, an early (parse time) error must be thrown if the regexp * would cause a run-time error when used in the expression new RegExp(...). * Parsing here simply extracts the (candidate) regexp, and also accepts * invalid regular expressions (which are delimited properly). The caller * (compiler) must perform final validation and regexp compilation. * * RegExp first char may not be '/' (single line comment) or '*' (multi- * line comment). These have already been checked above, so there is no * need below for special handling of the first regexp character as in * the E5 productions. * * About unicode escapes within regexp literals: * * E5 Section 7.8.5 grammar does NOT accept \uHHHH escapes. * However, Section 6 states that regexps accept the escapes, * see paragraph starting with "In string literals...". * The regexp grammar, which sees the decoded regexp literal * (after lexical parsing) DOES have a \uHHHH unicode escape. * So, for instance: * * /\u1234/ * * should first be parsed by the lexical grammar as: * * '\' 'u' RegularExpressionBackslashSequence * '1' RegularExpressionNonTerminator * '2' RegularExpressionNonTerminator * '3' RegularExpressionNonTerminator * '4' RegularExpressionNonTerminator * * and the escape itself is then parsed by the regexp engine. * This is the current implementation. * * Minor spec inconsistency: * * E5 Section 7.8.5 RegularExpressionBackslashSequence is: * * \ RegularExpressionNonTerminator * * while Section A.1 RegularExpressionBackslashSequence is: * * \ NonTerminator * * The latter is not normative and a typo. * */ /* first, parse regexp body roughly */ duk_small_int_t state = 0; /* 0=base, 1=esc, 2=class, 3=class+esc */ DUK__INITBUFFER(lex_ctx); for (;;) { DUK__ADVANCECHARS(lex_ctx, 1); /* skip opening slash on first loop */ x = DUK__L0(); if (x < 0 || duk_unicode_is_line_terminator(x)) { goto fail_unterm_regexp; } x = DUK__L0(); /* re-read to avoid spill / fetch */ if (state == 0) { if (x == DUK_ASC_SLASH) { DUK__ADVANCECHARS(lex_ctx, 1); /* eat closing slash */ break; } else if (x == DUK_ASC_BACKSLASH) { state = 1; } else if (x == DUK_ASC_LBRACKET) { state = 2; } } else if (state == 1) { state = 0; } else if (state == 2) { if (x == DUK_ASC_RBRACKET) { state = 0; } else if (x == DUK_ASC_BACKSLASH) { state = 3; } } else { /* state == 3 */ state = 2; } DUK__APPENDBUFFER(lex_ctx, x); } out_token->str1 = duk__internbuffer(lex_ctx, lex_ctx->slot1_idx); /* second, parse flags */ DUK__INITBUFFER(lex_ctx); for (;;) { x = DUK__L0(); if (!duk_unicode_is_identifier_part(x)) { break; } x = DUK__L0(); /* re-read to avoid spill / fetch */ DUK__APPENDBUFFER(lex_ctx, x); DUK__ADVANCECHARS(lex_ctx, 1); } out_token->str2 = duk__internbuffer(lex_ctx, lex_ctx->slot2_idx); DUK__INITBUFFER(lex_ctx); /* free some memory */ /* validation of the regexp is caller's responsibility */ advtok = DUK__ADVTOK(0, DUK_TOK_REGEXP); #else /* DUK_USE_REGEXP_SUPPORT */ goto fail_regexp_support; #endif /* DUK_USE_REGEXP_SUPPORT */ } else if (DUK__L1() == DUK_ASC_EQUALS) { /* "/=" and not in regexp mode */ advtok = DUK__ADVTOK(2, DUK_TOK_DIV_EQ); } else { /* "/" and not in regexp mode */ advtok = DUK__ADVTOK(1, DUK_TOK_DIV); } break; case DUK_ASC_LCURLY: /* '{' */ advtok = DUK__ADVTOK(1, DUK_TOK_LCURLY); break; case DUK_ASC_RCURLY: /* '}' */ advtok = DUK__ADVTOK(1, DUK_TOK_RCURLY); break; case DUK_ASC_LPAREN: /* '(' */ advtok = DUK__ADVTOK(1, DUK_TOK_LPAREN); break; case DUK_ASC_RPAREN: /* ')' */ advtok = DUK__ADVTOK(1, DUK_TOK_RPAREN); break; case DUK_ASC_LBRACKET: /* '[' */ advtok = DUK__ADVTOK(1, DUK_TOK_LBRACKET); break; case DUK_ASC_RBRACKET: /* ']' */ advtok = DUK__ADVTOK(1, DUK_TOK_RBRACKET); break; case DUK_ASC_PERIOD: /* '.' */ if (DUK__ISDIGIT(DUK__L1())) { /* Period followed by a digit can only start DecimalLiteral * (handled in slow path). We could jump straight into the * DecimalLiteral handling but should avoid goto to inside * a block. */ goto slow_path; } advtok = DUK__ADVTOK(1, DUK_TOK_PERIOD); break; case DUK_ASC_SEMICOLON: /* ';' */ advtok = DUK__ADVTOK(1, DUK_TOK_SEMICOLON); break; case DUK_ASC_COMMA: /* ',' */ advtok = DUK__ADVTOK(1, DUK_TOK_COMMA); break; case DUK_ASC_LANGLE: /* '<' */ #if defined(DUK_USE_HTML_COMMENTS) if (DUK__L1() == DUK_ASC_EXCLAMATION && DUK__L2() == DUK_ASC_MINUS && DUK__L3() == DUK_ASC_MINUS) { /* * ES2015: B.1.3, handle "" SingleLineHTMLCloseComment * Only allowed: * - on new line * - preceded only by whitespace * - preceded by end of multiline comment and optional whitespace * * Since whitespace generates no tokens, and multiline comments * are treated as a line ending, consulting `got_lineterm` is * sufficient to test for these three options. */ /* DUK__ADVANCECHARS(lex_ctx, 3) would be correct here, but not necessary */ duk__lexer_skip_to_endofline(lex_ctx); goto restart; /* line terminator will be handled on next round */ } else #endif /* DUK_USE_HTML_COMMENTS */ if (DUK__L1() == DUK_ASC_MINUS) { advtok = DUK__ADVTOK(2, DUK_TOK_DECREMENT); } else if (DUK__L1() == DUK_ASC_EQUALS) { advtok = DUK__ADVTOK(2, DUK_TOK_SUB_EQ); } else { advtok = DUK__ADVTOK(1, DUK_TOK_SUB); } break; case DUK_ASC_STAR: /* '*' */ #if defined(DUK_USE_ES7_EXP_OPERATOR) if (DUK__L1() == DUK_ASC_STAR && DUK__L2() == DUK_ASC_EQUALS) { advtok = DUK__ADVTOK(3, DUK_TOK_EXP_EQ); } else if (DUK__L1() == DUK_ASC_STAR) { advtok = DUK__ADVTOK(2, DUK_TOK_EXP); } else #endif if (DUK__L1() == DUK_ASC_EQUALS) { advtok = DUK__ADVTOK(2, DUK_TOK_MUL_EQ); } else { advtok = DUK__ADVTOK(1, DUK_TOK_MUL); } break; case DUK_ASC_PERCENT: /* '%' */ if (DUK__L1() == DUK_ASC_EQUALS) { advtok = DUK__ADVTOK(2, DUK_TOK_MOD_EQ); } else { advtok = DUK__ADVTOK(1, DUK_TOK_MOD); } break; case DUK_ASC_AMP: /* '&' */ if (DUK__L1() == DUK_ASC_AMP) { advtok = DUK__ADVTOK(2, DUK_TOK_LAND); } else if (DUK__L1() == DUK_ASC_EQUALS) { advtok = DUK__ADVTOK(2, DUK_TOK_BAND_EQ); } else { advtok = DUK__ADVTOK(1, DUK_TOK_BAND); } break; case DUK_ASC_PIPE: /* '|' */ if (DUK__L1() == DUK_ASC_PIPE) { advtok = DUK__ADVTOK(2, DUK_TOK_LOR); } else if (DUK__L1() == DUK_ASC_EQUALS) { advtok = DUK__ADVTOK(2, DUK_TOK_BOR_EQ); } else { advtok = DUK__ADVTOK(1, DUK_TOK_BOR); } break; case DUK_ASC_CARET: /* '^' */ if (DUK__L1() == DUK_ASC_EQUALS) { advtok = DUK__ADVTOK(2, DUK_TOK_BXOR_EQ); } else { advtok = DUK__ADVTOK(1, DUK_TOK_BXOR); } break; case DUK_ASC_TILDE: /* '~' */ advtok = DUK__ADVTOK(1, DUK_TOK_BNOT); break; case DUK_ASC_QUESTION: /* '?' */ advtok = DUK__ADVTOK(1, DUK_TOK_QUESTION); break; case DUK_ASC_COLON: /* ':' */ advtok = DUK__ADVTOK(1, DUK_TOK_COLON); break; case DUK_ASC_DOUBLEQUOTE: /* '"' */ case DUK_ASC_SINGLEQUOTE: { /* '\'' */ DUK__INITBUFFER(lex_ctx); duk__lexer_parse_string_literal(lex_ctx, out_token, x /*quote*/, strict_mode); duk__internbuffer(lex_ctx, lex_ctx->slot1_idx); out_token->str1 = duk_known_hstring(lex_ctx->thr, lex_ctx->slot1_idx); DUK__INITBUFFER(lex_ctx); /* free some memory */ advtok = DUK__ADVTOK(0, DUK_TOK_STRING); break; } default: goto slow_path; } /* switch */ goto skip_slow_path; slow_path: if (duk_unicode_is_line_terminator(x)) { if (x == 0x000d && DUK__L1() == 0x000a) { /* * E5 Section 7.3: CR LF is detected as a single line terminator for * line numbers. Here we also detect it as a single line terminator * token. */ DUK__ADVANCECHARS(lex_ctx, 2); } else { DUK__ADVANCECHARS(lex_ctx, 1); } got_lineterm = 1; goto restart_lineupdate; } else if (duk_unicode_is_identifier_start(x) || x == DUK_ASC_BACKSLASH) { /* * Parse an identifier and then check whether it is: * - reserved word (keyword or other reserved word) * - "null" (NullLiteral) * - "true" (BooleanLiteral) * - "false" (BooleanLiteral) * - anything else => identifier * * This does not follow the E5 productions cleanly, but is * useful and compact. * * Note that identifiers may contain Unicode escapes, * see E5 Sections 6 and 7.6. They must be decoded first, * and the result checked against allowed characters. * The above if-clause accepts an identifier start and an * '\' character -- no other token can begin with a '\'. * * Note that "get" and "set" are not reserved words in E5 * specification so they are recognized as plain identifiers * (the tokens DUK_TOK_GET and DUK_TOK_SET are actually not * used now). The compiler needs to work around this. * * Strictly speaking, following ECMAScript longest match * specification, an invalid escape for the first character * should cause a syntax error. However, an invalid escape * for IdentifierParts should just terminate the identifier * early (longest match), and let the next tokenization * fail. For instance Rhino croaks with 'foo\z' when * parsing the identifier. This has little practical impact. */ duk_small_uint_t i, i_end; duk_bool_t first = 1; duk_hstring *str; DUK__INITBUFFER(lex_ctx); for (;;) { /* re-lookup first char on first loop */ if (DUK__L0() == DUK_ASC_BACKSLASH) { duk_codepoint_t esc_cp; if (DUK__L1() != DUK_ASC_LC_U) { goto fail_escape; } esc_cp = duk__lexer_parse_escape(lex_ctx, 1 /*allow_es6*/); DUK__APPENDBUFFER(lex_ctx, esc_cp); /* IdentifierStart is stricter than IdentifierPart, so if the first * character is escaped, must have a stricter check here. */ if (!(first ? duk_unicode_is_identifier_start(esc_cp) : duk_unicode_is_identifier_part(esc_cp))) { goto fail_escape; } /* Track number of escapes: necessary for proper keyword * detection. */ out_token->num_escapes++; } else { /* Note: first character is checked against this. But because * IdentifierPart includes all IdentifierStart characters, and * the first character (if unescaped) has already been checked * in the if condition, this is OK. */ if (!duk_unicode_is_identifier_part(DUK__L0())) { break; } DUK__APPENDBUFFER(lex_ctx, DUK__L0()); DUK__ADVANCECHARS(lex_ctx, 1); } first = 0; } out_token->str1 = duk__internbuffer(lex_ctx, lex_ctx->slot1_idx); str = out_token->str1; out_token->t_nores = DUK_TOK_IDENTIFIER; DUK__INITBUFFER(lex_ctx); /* free some memory */ /* * Interned identifier is compared against reserved words, which are * currently interned into the heap context. See genbuiltins.py. * * Note that an escape in the identifier disables recognition of * keywords; e.g. "\u0069f = 1;" is a valid statement (assigns to * identifier named "if"). This is not necessarily compliant, * see test-dec-escaped-char-in-keyword.js. * * Note: "get" and "set" are awkward. They are not officially * ReservedWords (and indeed e.g. "var set = 1;" is valid), and * must come out as DUK_TOK_IDENTIFIER. The compiler needs to * work around this a bit. */ /* XXX: optimize by adding the token numbers directly into the * always interned duk_hstring objects (there should be enough * flag bits free for that)? */ i_end = (strict_mode ? DUK_STRIDX_END_RESERVED : DUK_STRIDX_START_STRICT_RESERVED); advtok = DUK__ADVTOK(0, DUK_TOK_IDENTIFIER); if (out_token->num_escapes == 0) { for (i = DUK_STRIDX_START_RESERVED; i < i_end; i++) { DUK_ASSERT_DISABLE(i >= 0); /* unsigned */ DUK_ASSERT(i < DUK_HEAP_NUM_STRINGS); if (DUK_HTHREAD_GET_STRING(lex_ctx->thr, i) == str) { advtok = DUK__ADVTOK(0, DUK_STRIDX_TO_TOK(i)); break; } } } } else if (DUK__ISDIGIT(x) || (x == DUK_ASC_PERIOD)) { /* Note: decimal number may start with a period, but must be followed by a digit */ /* * Pre-parsing for decimal, hex, octal (both legacy and ES2015), * and binary literals, followed by an actual parser step * provided by numconv. * * Note: the leading sign character ('+' or '-') is -not- part of * the production in E5 grammar, and that the a DecimalLiteral * starting with a '0' must be followed by a non-digit. * * XXX: the two step parsing process is quite awkward, it would * be more straightforward to allow numconv to parse the longest * valid prefix (it already does that, it only needs to indicate * where the input ended). However, the lexer decodes characters * using a limited lookup window, so this is not a trivial change. */ /* XXX: because of the final check below (that the literal is not * followed by a digit), this could maybe be simplified, if we bail * out early from a leading zero (and if there are no periods etc). * Maybe too complex. */ duk_double_t val; duk_bool_t legacy_oct = 0; duk_small_int_t state; /* 0=before period/exp, * 1=after period, before exp * 2=after exp, allow '+' or '-' * 3=after exp and exp sign */ duk_small_uint_t s2n_flags; duk_codepoint_t y, z; duk_small_int_t s2n_radix = 10; duk_small_uint_t pre_adv = 0; DUK__INITBUFFER(lex_ctx); y = DUK__L1(); if (x == DUK_ASC_0) { z = DUK_LOWERCASE_CHAR_ASCII(y); pre_adv = 2; /* default for 0xNNN, 0oNNN, 0bNNN. */ if (z == DUK_ASC_LC_X) { s2n_radix = 16; } else if (z == DUK_ASC_LC_O) { s2n_radix = 8; } else if (z == DUK_ASC_LC_B) { s2n_radix = 2; } else { pre_adv = 0; if (DUK__ISDIGIT(y)) { if (strict_mode) { /* Reject octal like \07 but also octal-lookalike * decimal like \08 in strict mode. */ goto fail_number_literal; } else { /* Legacy OctalIntegerLiteral or octal-lookalice * decimal. Deciding between the two happens below * in digit scanning. */ DUK__APPENDBUFFER(lex_ctx, x); pre_adv = 1; legacy_oct = 1; s2n_radix = 8; /* tentative unless conflicting digits found */ } } } } DUK__ADVANCECHARS(lex_ctx, pre_adv); /* XXX: we could parse integers here directly, and fall back * to numconv only when encountering a fractional expression * or when an octal literal turned out to be decimal (0778 etc). */ state = 0; for (;;) { x = DUK__L0(); /* re-lookup curr char on first round */ if (DUK__ISDIGIT(x)) { /* Note: intentionally allow leading zeroes here, as the * actual parser will check for them. */ if (state == 0 && legacy_oct && (x == DUK_ASC_8 || x == DUK_ASC_9)) { /* Started out as an octal-lookalike * but interpreted as decimal, e.g. * '0779' -> 779. This also means * that fractions are allowed, e.g. * '0779.123' is allowed but '0777.123' * is not! */ s2n_radix = 10; } if (state == 2) { state = 3; } } else if (s2n_radix == 16 && DUK__ISHEXDIGIT(x)) { /* Note: 'e' and 'E' are also accepted here. */ ; } else if (x == DUK_ASC_PERIOD) { if (state >= 1 || s2n_radix != 10) { break; } else { state = 1; } } else if (x == DUK_ASC_LC_E || x == DUK_ASC_UC_E) { if (state >= 2 || s2n_radix != 10) { break; } else { state = 2; } } else if (x == DUK_ASC_MINUS || x == DUK_ASC_PLUS) { if (state != 2) { break; } else { state = 3; } } else { break; } DUK__APPENDBUFFER(lex_ctx, x); DUK__ADVANCECHARS(lex_ctx, 1); } /* XXX: better coercion */ (void) duk__internbuffer(lex_ctx, lex_ctx->slot1_idx); if (s2n_radix != 10) { /* For bases other than 10, integer only. */ s2n_flags = DUK_S2N_FLAG_ALLOW_LEADING_ZERO; } else { s2n_flags = DUK_S2N_FLAG_ALLOW_EXP | DUK_S2N_FLAG_ALLOW_FRAC | DUK_S2N_FLAG_ALLOW_NAKED_FRAC | DUK_S2N_FLAG_ALLOW_EMPTY_FRAC | DUK_S2N_FLAG_ALLOW_LEADING_ZERO; } duk_dup(lex_ctx->thr, lex_ctx->slot1_idx); duk_numconv_parse(lex_ctx->thr, s2n_radix, s2n_flags); val = duk_to_number_m1(lex_ctx->thr); if (DUK_ISNAN(val)) { goto fail_number_literal; } duk_replace(lex_ctx->thr, lex_ctx->slot1_idx); /* could also just pop? */ DUK__INITBUFFER(lex_ctx); /* free some memory */ /* Section 7.8.3 (note): NumericLiteral must be followed by something other than * IdentifierStart or DecimalDigit. */ if (DUK__ISDIGIT(DUK__L0()) || duk_unicode_is_identifier_start(DUK__L0())) { goto fail_number_literal; } out_token->num = val; advtok = DUK__ADVTOK(0, DUK_TOK_NUMBER); } else if (duk_unicode_is_whitespace(DUK__LOOKUP(lex_ctx, 0))) { DUK__ADVANCECHARS(lex_ctx, 1); goto restart; } else if (x < 0) { advtok = DUK__ADVTOK(0, DUK_TOK_EOF); } else { goto fail_token; } skip_slow_path: /* * Shared exit path */ DUK__ADVANCEBYTES(lex_ctx, advtok >> 8); out_token->t = advtok & 0xff; if (out_token->t_nores == DUK_TOK_INVALID) { out_token->t_nores = out_token->t; } out_token->lineterm = got_lineterm; /* Automatic semicolon insertion is allowed if a token is preceded * by line terminator(s), or terminates a statement list (right curly * or EOF). */ if (got_lineterm || out_token->t == DUK_TOK_RCURLY || out_token->t == DUK_TOK_EOF) { out_token->allow_auto_semi = 1; } else { out_token->allow_auto_semi = 0; } return; fail_token_limit: DUK_ERROR_RANGE(lex_ctx->thr, DUK_STR_TOKEN_LIMIT); DUK_WO_NORETURN(return;); fail_token: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_TOKEN); DUK_WO_NORETURN(return;); fail_number_literal: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_NUMBER_LITERAL); DUK_WO_NORETURN(return;); fail_escape: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_ESCAPE); DUK_WO_NORETURN(return;); fail_unterm_regexp: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_UNTERMINATED_REGEXP); DUK_WO_NORETURN(return;); fail_unterm_comment: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_UNTERMINATED_COMMENT); DUK_WO_NORETURN(return;); #if !defined(DUK_USE_REGEXP_SUPPORT) fail_regexp_support: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_REGEXP_SUPPORT_DISABLED); DUK_WO_NORETURN(return;); #endif } #if defined(DUK_USE_REGEXP_SUPPORT) /* * Parse a RegExp token. The grammar is described in E5 Section 15.10. * Terminal constructions (such as quantifiers) are parsed directly here. * * 0xffffffffU is used as a marker for "infinity" in quantifiers. Further, * DUK__MAX_RE_QUANT_DIGITS limits the maximum number of digits that * will be accepted for a quantifier. */ DUK_INTERNAL void duk_lexer_parse_re_token(duk_lexer_ctx *lex_ctx, duk_re_token *out_token) { duk_small_uint_t advtok = 0; /* init is unnecessary but suppresses "may be used uninitialized" warnings */ duk_codepoint_t x, y; if (++lex_ctx->token_count >= lex_ctx->token_limit) { goto fail_token_limit; } duk_memzero(out_token, sizeof(*out_token)); x = DUK__L0(); y = DUK__L1(); DUK_DDD(DUK_DDDPRINT("parsing regexp token, L0=%ld, L1=%ld", (long) x, (long) y)); switch (x) { case DUK_ASC_PIPE: { advtok = DUK__ADVTOK(1, DUK_RETOK_DISJUNCTION); break; } case DUK_ASC_CARET: { advtok = DUK__ADVTOK(1, DUK_RETOK_ASSERT_START); break; } case DUK_ASC_DOLLAR: { advtok = DUK__ADVTOK(1, DUK_RETOK_ASSERT_END); break; } case DUK_ASC_QUESTION: { out_token->qmin = 0; out_token->qmax = 1; if (y == DUK_ASC_QUESTION) { advtok = DUK__ADVTOK(2, DUK_RETOK_QUANTIFIER); out_token->greedy = 0; } else { advtok = DUK__ADVTOK(1, DUK_RETOK_QUANTIFIER); out_token->greedy = 1; } break; } case DUK_ASC_STAR: { out_token->qmin = 0; out_token->qmax = DUK_RE_QUANTIFIER_INFINITE; if (y == DUK_ASC_QUESTION) { advtok = DUK__ADVTOK(2, DUK_RETOK_QUANTIFIER); out_token->greedy = 0; } else { advtok = DUK__ADVTOK(1, DUK_RETOK_QUANTIFIER); out_token->greedy = 1; } break; } case DUK_ASC_PLUS: { out_token->qmin = 1; out_token->qmax = DUK_RE_QUANTIFIER_INFINITE; if (y == DUK_ASC_QUESTION) { advtok = DUK__ADVTOK(2, DUK_RETOK_QUANTIFIER); out_token->greedy = 0; } else { advtok = DUK__ADVTOK(1, DUK_RETOK_QUANTIFIER); out_token->greedy = 1; } break; } case DUK_ASC_LCURLY: { /* Production allows 'DecimalDigits', including leading zeroes */ duk_uint32_t val1 = 0; duk_uint32_t val2 = DUK_RE_QUANTIFIER_INFINITE; duk_small_int_t digits = 0; #if defined(DUK_USE_ES6_REGEXP_SYNTAX) duk_lexer_point lex_pt; #endif #if defined(DUK_USE_ES6_REGEXP_SYNTAX) /* Store lexer position, restoring if quantifier is invalid. */ DUK_LEXER_GETPOINT(lex_ctx, &lex_pt); #endif for (;;) { DUK__ADVANCECHARS(lex_ctx, 1); /* eat '{' on entry */ x = DUK__L0(); if (DUK__ISDIGIT(x)) { digits++; val1 = val1 * 10 + (duk_uint32_t) duk__hexval(x); } else if (x == DUK_ASC_COMMA) { if (digits > DUK__MAX_RE_QUANT_DIGITS) { goto invalid_quantifier; } if (val2 != DUK_RE_QUANTIFIER_INFINITE) { goto invalid_quantifier; } if (DUK__L1() == DUK_ASC_RCURLY) { /* form: { DecimalDigits , }, val1 = min count */ if (digits == 0) { goto invalid_quantifier; } out_token->qmin = val1; out_token->qmax = DUK_RE_QUANTIFIER_INFINITE; DUK__ADVANCECHARS(lex_ctx, 2); break; } val2 = val1; val1 = 0; digits = 0; /* not strictly necessary because of lookahead '}' above */ } else if (x == DUK_ASC_RCURLY) { if (digits > DUK__MAX_RE_QUANT_DIGITS) { goto invalid_quantifier; } if (digits == 0) { goto invalid_quantifier; } if (val2 != DUK_RE_QUANTIFIER_INFINITE) { /* val2 = min count, val1 = max count */ out_token->qmin = val2; out_token->qmax = val1; } else { /* val1 = count */ out_token->qmin = val1; out_token->qmax = val1; } DUK__ADVANCECHARS(lex_ctx, 1); break; } else { goto invalid_quantifier; } } if (DUK__L0() == DUK_ASC_QUESTION) { out_token->greedy = 0; DUK__ADVANCECHARS(lex_ctx, 1); } else { out_token->greedy = 1; } advtok = DUK__ADVTOK(0, DUK_RETOK_QUANTIFIER); break; invalid_quantifier: #if defined(DUK_USE_ES6_REGEXP_SYNTAX) /* Failed to match the quantifier, restore lexer and parse * opening brace as a literal. */ DUK_LEXER_SETPOINT(lex_ctx, &lex_pt); advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_CHAR); out_token->num = DUK_ASC_LCURLY; #else goto fail_quantifier; #endif break; } case DUK_ASC_PERIOD: { advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_PERIOD); break; } case DUK_ASC_BACKSLASH: { /* The E5.1 specification does not seem to allow IdentifierPart characters * to be used as identity escapes. Unfortunately this includes '$', which * cannot be escaped as '\$'; it needs to be escaped e.g. as '\u0024'. * Many other implementations (including V8 and Rhino, for instance) do * accept '\$' as a valid identity escape, which is quite pragmatic, and * ES2015 Annex B relaxes the rules to allow these (and other) real world forms. */ advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_CHAR); /* default: char escape (two chars) */ if (y == DUK_ASC_LC_B) { advtok = DUK__ADVTOK(2, DUK_RETOK_ASSERT_WORD_BOUNDARY); } else if (y == DUK_ASC_UC_B) { advtok = DUK__ADVTOK(2, DUK_RETOK_ASSERT_NOT_WORD_BOUNDARY); } else if (y == DUK_ASC_LC_F) { out_token->num = 0x000c; } else if (y == DUK_ASC_LC_N) { out_token->num = 0x000a; } else if (y == DUK_ASC_LC_T) { out_token->num = 0x0009; } else if (y == DUK_ASC_LC_R) { out_token->num = 0x000d; } else if (y == DUK_ASC_LC_V) { out_token->num = 0x000b; } else if (y == DUK_ASC_LC_C) { x = DUK__L2(); if ((x >= DUK_ASC_LC_A && x <= DUK_ASC_LC_Z) || (x >= DUK_ASC_UC_A && x <= DUK_ASC_UC_Z)) { out_token->num = (duk_uint32_t) (x % 32); advtok = DUK__ADVTOK(3, DUK_RETOK_ATOM_CHAR); } else { goto fail_escape; } } else if (y == DUK_ASC_LC_X || y == DUK_ASC_LC_U) { /* The token value is the Unicode codepoint without * it being decode into surrogate pair characters * here. The \u{H+} is only allowed in Unicode mode * which we don't support yet. */ out_token->num = (duk_uint32_t) duk__lexer_parse_escape(lex_ctx, 0 /*allow_es6*/); advtok = DUK__ADVTOK(0, DUK_RETOK_ATOM_CHAR); } else if (y == DUK_ASC_LC_D) { advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_DIGIT); } else if (y == DUK_ASC_UC_D) { advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_NOT_DIGIT); } else if (y == DUK_ASC_LC_S) { advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_WHITE); } else if (y == DUK_ASC_UC_S) { advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_NOT_WHITE); } else if (y == DUK_ASC_LC_W) { advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_WORD_CHAR); } else if (y == DUK_ASC_UC_W) { advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_NOT_WORD_CHAR); } else if (DUK__ISDIGIT(y)) { /* E5 Section 15.10.2.11 */ if (y == DUK_ASC_0) { if (DUK__ISDIGIT(DUK__L2())) { goto fail_escape; } out_token->num = 0x0000; advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_CHAR); } else { /* XXX: shared parsing? */ duk_uint32_t val = 0; duk_small_int_t i; for (i = 0; ; i++) { if (i >= DUK__MAX_RE_DECESC_DIGITS) { goto fail_escape; } DUK__ADVANCECHARS(lex_ctx, 1); /* eat backslash on entry */ x = DUK__L0(); if (!DUK__ISDIGIT(x)) { break; } val = val * 10 + (duk_uint32_t) duk__hexval(x); } /* DUK__L0() cannot be a digit, because the loop doesn't terminate if it is */ advtok = DUK__ADVTOK(0, DUK_RETOK_ATOM_BACKREFERENCE); out_token->num = val; } #if defined(DUK_USE_ES6_REGEXP_SYNTAX) } else if (y >= 0) { /* For ES2015 Annex B, accept any source character as identity * escape except 'c' which is used for control characters. * http://www.ecma-international.org/ecma-262/6.0/#sec-regular-expressions-patterns * Careful not to match end-of-buffer (<0) here. * This is not yet full ES2015 Annex B because cases above * (like hex escape) won't backtrack. */ DUK_ASSERT(y != DUK_ASC_LC_C); /* covered above */ #else /* DUK_USE_ES6_REGEXP_SYNTAX */ } else if ((y >= 0 && !duk_unicode_is_identifier_part(y)) || y == DUK_UNICODE_CP_ZWNJ || y == DUK_UNICODE_CP_ZWJ) { /* For ES5.1 identity escapes are not allowed for identifier * parts. This conflicts with a lot of real world code as this * doesn't e.g. allow escaping a dollar sign as /\$/, see * test-regexp-identity-escape-dollar.js. */ #endif /* DUK_USE_ES6_REGEXP_SYNTAX */ out_token->num = (duk_uint32_t) y; } else { goto fail_escape; } break; } case DUK_ASC_LPAREN: { /* XXX: naming is inconsistent: ATOM_END_GROUP ends an ASSERT_START_LOOKAHEAD */ if (y == DUK_ASC_QUESTION) { if (DUK__L2() == DUK_ASC_EQUALS) { /* (?= */ advtok = DUK__ADVTOK(3, DUK_RETOK_ASSERT_START_POS_LOOKAHEAD); } else if (DUK__L2() == DUK_ASC_EXCLAMATION) { /* (?! */ advtok = DUK__ADVTOK(3, DUK_RETOK_ASSERT_START_NEG_LOOKAHEAD); } else if (DUK__L2() == DUK_ASC_COLON) { /* (?: */ advtok = DUK__ADVTOK(3, DUK_RETOK_ATOM_START_NONCAPTURE_GROUP); } else { goto fail_group; } } else { /* ( */ advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_START_CAPTURE_GROUP); } break; } case DUK_ASC_RPAREN: { advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_END_GROUP); break; } case DUK_ASC_LBRACKET: { /* * To avoid creating a heavy intermediate value for the list of ranges, * only the start token ('[' or '[^') is parsed here. The regexp * compiler parses the ranges itself. */ /* XXX: with DUK_USE_ES6_REGEXP_SYNTAX we should allow left bracket * literal too, but it's not easy to parse without backtracking. */ advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_START_CHARCLASS); if (y == DUK_ASC_CARET) { advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_START_CHARCLASS_INVERTED); } break; } #if !defined(DUK_USE_ES6_REGEXP_SYNTAX) case DUK_ASC_RCURLY: case DUK_ASC_RBRACKET: { /* Although these could be parsed as PatternCharacters unambiguously (here), * E5 Section 15.10.1 grammar explicitly forbids these as PatternCharacters. */ goto fail_invalid_char; break; } #endif case -1: { /* EOF */ advtok = DUK__ADVTOK(0, DUK_TOK_EOF); break; } default: { /* PatternCharacter, all excluded characters are matched by cases above */ advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_CHAR); out_token->num = (duk_uint32_t) x; break; } } /* * Shared exit path */ DUK__ADVANCEBYTES(lex_ctx, advtok >> 8); out_token->t = advtok & 0xff; return; fail_token_limit: DUK_ERROR_RANGE(lex_ctx->thr, DUK_STR_TOKEN_LIMIT); DUK_WO_NORETURN(return;); fail_escape: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_REGEXP_ESCAPE); DUK_WO_NORETURN(return;); fail_group: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_REGEXP_GROUP); DUK_WO_NORETURN(return;); #if !defined(DUK_USE_ES6_REGEXP_SYNTAX) fail_invalid_char: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_REGEXP_CHARACTER); DUK_WO_NORETURN(return;); fail_quantifier: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_QUANTIFIER); DUK_WO_NORETURN(return;); #endif } /* * Special parser for character classes; calls callback for every * range parsed and returns the number of ranges present. */ /* XXX: this duplicates functionality in duk_regexp.c where a similar loop is * required anyway. We could use that BUT we need to update the regexp compiler * 'nranges' too. Work this out a bit more cleanly to save space. */ /* XXX: the handling of character range detection is a bit convoluted. * Try to simplify and make smaller. */ /* XXX: logic for handling character ranges is now incorrect, it will accept * e.g. [\d-z] whereas it should croak from it? SMJS accepts this too, though. * * Needs a read through and a lot of additional tests. */ DUK_LOCAL void duk__emit_u16_direct_ranges(duk_lexer_ctx *lex_ctx, duk_re_range_callback gen_range, void *userdata, const duk_uint16_t *ranges, duk_small_int_t num) { const duk_uint16_t *ranges_end; DUK_UNREF(lex_ctx); ranges_end = ranges + num; while (ranges < ranges_end) { /* mark range 'direct', bypass canonicalization (see Wiki) */ gen_range(userdata, (duk_codepoint_t) ranges[0], (duk_codepoint_t) ranges[1], 1); ranges += 2; } } DUK_INTERNAL void duk_lexer_parse_re_ranges(duk_lexer_ctx *lex_ctx, duk_re_range_callback gen_range, void *userdata) { duk_codepoint_t start = -1; duk_codepoint_t ch; duk_codepoint_t x; duk_bool_t dash = 0; duk_small_uint_t adv = 0; DUK_DD(DUK_DDPRINT("parsing regexp ranges")); for (;;) { DUK__ADVANCECHARS(lex_ctx, adv); adv = 1; x = DUK__L0(); ch = -1; /* not strictly necessary, but avoids "uninitialized variable" warnings */ DUK_UNREF(ch); if (x < 0) { goto fail_unterm_charclass; } else if (x == DUK_ASC_RBRACKET) { if (start >= 0) { gen_range(userdata, start, start, 0); } DUK__ADVANCECHARS(lex_ctx, 1); /* eat ']' before finishing */ break; } else if (x == DUK_ASC_MINUS) { if (start >= 0 && !dash && DUK__L1() != DUK_ASC_RBRACKET) { /* '-' as a range indicator */ dash = 1; continue; } else { /* '-' verbatim */ ch = x; } } else if (x == DUK_ASC_BACKSLASH) { /* * The escapes are same as outside a character class, except that \b has a * different meaning, and \B and backreferences are prohibited (see E5 * Section 15.10.2.19). However, it's difficult to share code because we * handle e.g. "\n" very differently: here we generate a single character * range for it. */ /* XXX: ES2015 surrogate pair handling. */ x = DUK__L1(); adv = 2; if (x == DUK_ASC_LC_B) { /* Note: '\b' in char class is different than outside (assertion), * '\B' is not allowed and is caught by the duk_unicode_is_identifier_part() * check below. */ ch = 0x0008; } else if (x == DUK_ASC_LC_F) { ch = 0x000c; } else if (x == DUK_ASC_LC_N) { ch = 0x000a; } else if (x == DUK_ASC_LC_T) { ch = 0x0009; } else if (x == DUK_ASC_LC_R) { ch = 0x000d; } else if (x == DUK_ASC_LC_V) { ch = 0x000b; } else if (x == DUK_ASC_LC_C) { x = DUK__L2(); adv = 3; if ((x >= DUK_ASC_LC_A && x <= DUK_ASC_LC_Z) || (x >= DUK_ASC_UC_A && x <= DUK_ASC_UC_Z)) { ch = (x % 32); } else { goto fail_escape; } } else if (x == DUK_ASC_LC_X || x == DUK_ASC_LC_U) { /* The \u{H+} form is only allowed in Unicode mode which * we don't support yet. */ ch = duk__lexer_parse_escape(lex_ctx, 0 /*allow_es6*/); adv = 0; } else if (x == DUK_ASC_LC_D) { duk__emit_u16_direct_ranges(lex_ctx, gen_range, userdata, duk_unicode_re_ranges_digit, sizeof(duk_unicode_re_ranges_digit) / sizeof(duk_uint16_t)); ch = -1; } else if (x == DUK_ASC_UC_D) { duk__emit_u16_direct_ranges(lex_ctx, gen_range, userdata, duk_unicode_re_ranges_not_digit, sizeof(duk_unicode_re_ranges_not_digit) / sizeof(duk_uint16_t)); ch = -1; } else if (x == DUK_ASC_LC_S) { duk__emit_u16_direct_ranges(lex_ctx, gen_range, userdata, duk_unicode_re_ranges_white, sizeof(duk_unicode_re_ranges_white) / sizeof(duk_uint16_t)); ch = -1; } else if (x == DUK_ASC_UC_S) { duk__emit_u16_direct_ranges(lex_ctx, gen_range, userdata, duk_unicode_re_ranges_not_white, sizeof(duk_unicode_re_ranges_not_white) / sizeof(duk_uint16_t)); ch = -1; } else if (x == DUK_ASC_LC_W) { duk__emit_u16_direct_ranges(lex_ctx, gen_range, userdata, duk_unicode_re_ranges_wordchar, sizeof(duk_unicode_re_ranges_wordchar) / sizeof(duk_uint16_t)); ch = -1; } else if (x == DUK_ASC_UC_W) { duk__emit_u16_direct_ranges(lex_ctx, gen_range, userdata, duk_unicode_re_ranges_not_wordchar, sizeof(duk_unicode_re_ranges_not_wordchar) / sizeof(duk_uint16_t)); ch = -1; } else if (DUK__ISDIGIT(x)) { /* DecimalEscape, only \0 is allowed, no leading * zeroes are allowed. * * ES2015 Annex B also allows (maximal match) legacy * octal escapes up to \377 and \8 and \9 are * accepted as literal '8' and '9', also in strict mode. */ #if defined(DUK_USE_ES6_REGEXP_SYNTAX) ch = duk__lexer_parse_legacy_octal(lex_ctx, &adv, 0 /*reject_annex_b*/); DUK_ASSERT(ch >= 0); /* no rejections */ #else if (x == DUK_ASC_0 && !DUK__ISDIGIT(DUK__L2())) { ch = 0x0000; } else { goto fail_escape; } #endif #if defined(DUK_USE_ES6_REGEXP_SYNTAX) } else if (x >= 0) { /* IdentityEscape: ES2015 Annex B allows almost all * source characters here. Match anything except * EOF here. */ ch = x; #else /* DUK_USE_ES6_REGEXP_SYNTAX */ } else if (!duk_unicode_is_identifier_part(x)) { /* IdentityEscape: ES5.1 doesn't allow identity escape * for identifier part characters, which conflicts with * some real world code. For example, it doesn't allow * /[\$]/ which is awkward. */ ch = x; #endif /* DUK_USE_ES6_REGEXP_SYNTAX */ } else { goto fail_escape; } } else { /* character represents itself */ ch = x; } /* ch is a literal character here or -1 if parsed entity was * an escape such as "\s". */ if (ch < 0) { /* multi-character sets not allowed as part of ranges, see * E5 Section 15.10.2.15, abstract operation CharacterRange. */ if (start >= 0) { if (dash) { goto fail_range; } else { gen_range(userdata, start, start, 0); start = -1; /* dash is already 0 */ } } } else { if (start >= 0) { if (dash) { if (start > ch) { goto fail_range; } gen_range(userdata, start, ch, 0); start = -1; dash = 0; } else { gen_range(userdata, start, start, 0); start = ch; /* dash is already 0 */ } } else { start = ch; } } } return; fail_escape: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_REGEXP_ESCAPE); DUK_WO_NORETURN(return;); fail_range: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_INVALID_RANGE); DUK_WO_NORETURN(return;); fail_unterm_charclass: DUK_ERROR_SYNTAX(lex_ctx->thr, DUK_STR_UNTERMINATED_CHARCLASS); DUK_WO_NORETURN(return;); } #endif /* DUK_USE_REGEXP_SUPPORT */ /* automatic undefs */ #undef DUK__ADVANCEBYTES #undef DUK__ADVANCECHARS #undef DUK__ADVTOK #undef DUK__APPENDBUFFER #undef DUK__APPENDBUFFER_ASCII #undef DUK__INITBUFFER #undef DUK__ISDIGIT #undef DUK__ISDIGIT03 #undef DUK__ISDIGIT47 #undef DUK__ISHEXDIGIT #undef DUK__ISOCTDIGIT #undef DUK__L0 #undef DUK__L1 #undef DUK__L2 #undef DUK__L3 #undef DUK__L4 #undef DUK__L5 #undef DUK__LOOKUP #undef DUK__MAX_RE_DECESC_DIGITS #undef DUK__MAX_RE_QUANT_DIGITS /* * Number-to-string and string-to-number conversions. * * Slow path number-to-string and string-to-number conversion is based on * a Dragon4 variant, with fast paths for small integers. Big integer * arithmetic is needed for guaranteeing that the conversion is correct * and uses a minimum number of digits. The big number arithmetic has a * fixed maximum size and does not require dynamic allocations. * * See: doc/number-conversion.rst. */ /* #include duk_internal.h -> already included */ #define DUK__IEEE_DOUBLE_EXP_BIAS 1023 #define DUK__IEEE_DOUBLE_EXP_MIN (-1022) /* biased exp == 0 -> denormal, exp -1022 */ #define DUK__DIGITCHAR(x) duk_lc_digits[(x)] /* * Tables generated with util/gennumdigits.py. * * duk__str2num_digits_for_radix indicates, for each radix, how many input * digits should be considered significant for string-to-number conversion. * The input is also padded to this many digits to give the Dragon4 * conversion enough (apparent) precision to work with. * * duk__str2num_exp_limits indicates, for each radix, the radix-specific * minimum/maximum exponent values (for a Dragon4 integer mantissa) * below and above which the number is guaranteed to underflow to zero * or overflow to Infinity. This allows parsing to keep bigint values * bounded. */ DUK_LOCAL const duk_uint8_t duk__str2num_digits_for_radix[] = { 69, 44, 35, 30, 27, 25, 23, 22, 20, 20, /* 2 to 11 */ 20, 19, 19, 18, 18, 17, 17, 17, 16, 16, /* 12 to 21 */ 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, /* 22 to 31 */ 14, 14, 14, 14, 14 /* 31 to 36 */ }; typedef struct { duk_int16_t upper; duk_int16_t lower; } duk__exp_limits; DUK_LOCAL const duk__exp_limits duk__str2num_exp_limits[] = { { 957, -1147 }, { 605, -725 }, { 479, -575 }, { 414, -496 }, { 372, -446 }, { 342, -411 }, { 321, -384 }, { 304, -364 }, { 291, -346 }, { 279, -334 }, { 268, -323 }, { 260, -312 }, { 252, -304 }, { 247, -296 }, { 240, -289 }, { 236, -283 }, { 231, -278 }, { 227, -273 }, { 223, -267 }, { 220, -263 }, { 216, -260 }, { 213, -256 }, { 210, -253 }, { 208, -249 }, { 205, -246 }, { 203, -244 }, { 201, -241 }, { 198, -239 }, { 196, -237 }, { 195, -234 }, { 193, -232 }, { 191, -230 }, { 190, -228 }, { 188, -226 }, { 187, -225 }, }; /* * Limited functionality bigint implementation. * * Restricted to non-negative numbers with less than 32 * DUK__BI_MAX_PARTS bits, * with the caller responsible for ensuring this is never exceeded. No memory * allocation (except stack) is needed for bigint computation. Operations * have been tailored for number conversion needs. * * Argument order is "assignment order", i.e. target first, then arguments: * x <- y * z --> duk__bi_mul(x, y, z); */ /* This upper value has been experimentally determined; debug build will check * bigint size with assertions. */ #define DUK__BI_MAX_PARTS 37 /* 37x32 = 1184 bits */ #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) #define DUK__BI_PRINT(name,x) duk__bi_print((name),(x)) #else #define DUK__BI_PRINT(name,x) #endif /* Current size is about 152 bytes. */ typedef struct { duk_small_int_t n; duk_uint32_t v[DUK__BI_MAX_PARTS]; /* low to high */ } duk__bigint; #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) DUK_LOCAL void duk__bi_print(const char *name, duk__bigint *x) { /* Overestimate required size; debug code so not critical to be tight. */ char buf[DUK__BI_MAX_PARTS * 9 + 64]; char *p = buf; duk_small_int_t i; /* No NUL term checks in this debug code. */ p += DUK_SPRINTF(p, "%p n=%ld", (void *) x, (long) x->n); if (x->n == 0) { p += DUK_SPRINTF(p, " 0"); } for (i = x->n - 1; i >= 0; i--) { p += DUK_SPRINTF(p, " %08lx", (unsigned long) x->v[i]); } DUK_DDD(DUK_DDDPRINT("%s: %s", (const char *) name, (const char *) buf)); } #endif #if defined(DUK_USE_ASSERTIONS) DUK_LOCAL duk_small_int_t duk__bi_is_valid(duk__bigint *x) { return (duk_small_int_t) ( ((x->n >= 0) && (x->n <= DUK__BI_MAX_PARTS)) /* is valid size */ && ((x->n == 0) || (x->v[x->n - 1] != 0)) /* is normalized */ ); } #endif DUK_LOCAL void duk__bi_normalize(duk__bigint *x) { duk_small_int_t i; for (i = x->n - 1; i >= 0; i--) { if (x->v[i] != 0) { break; } } /* Note: if 'x' is zero, x->n becomes 0 here */ x->n = i + 1; DUK_ASSERT(duk__bi_is_valid(x)); } /* x <- y */ DUK_LOCAL void duk__bi_copy(duk__bigint *x, duk__bigint *y) { duk_small_int_t n; n = y->n; x->n = n; /* No need to special case n == 0. */ duk_memcpy((void *) x->v, (const void *) y->v, (size_t) (sizeof(duk_uint32_t) * (size_t) n)); } DUK_LOCAL void duk__bi_set_small(duk__bigint *x, duk_uint32_t v) { if (v == 0U) { x->n = 0; } else { x->n = 1; x->v[0] = v; } DUK_ASSERT(duk__bi_is_valid(x)); } /* Return value: <0 <=> x < y * 0 <=> x == y * >0 <=> x > y */ DUK_LOCAL int duk__bi_compare(duk__bigint *x, duk__bigint *y) { duk_small_int_t i, nx, ny; duk_uint32_t tx, ty; DUK_ASSERT(duk__bi_is_valid(x)); DUK_ASSERT(duk__bi_is_valid(y)); nx = x->n; ny = y->n; if (nx > ny) { goto ret_gt; } if (nx < ny) { goto ret_lt; } for (i = nx - 1; i >= 0; i--) { tx = x->v[i]; ty = y->v[i]; if (tx > ty) { goto ret_gt; } if (tx < ty) { goto ret_lt; } } return 0; ret_gt: return 1; ret_lt: return -1; } /* x <- y + z */ #if defined(DUK_USE_64BIT_OPS) DUK_LOCAL void duk__bi_add(duk__bigint *x, duk__bigint *y, duk__bigint *z) { duk_uint64_t tmp; duk_small_int_t i, ny, nz; DUK_ASSERT(duk__bi_is_valid(y)); DUK_ASSERT(duk__bi_is_valid(z)); if (z->n > y->n) { duk__bigint *t; t = y; y = z; z = t; } DUK_ASSERT(y->n >= z->n); ny = y->n; nz = z->n; tmp = 0U; for (i = 0; i < ny; i++) { DUK_ASSERT(i < DUK__BI_MAX_PARTS); tmp += y->v[i]; if (i < nz) { tmp += z->v[i]; } x->v[i] = (duk_uint32_t) (tmp & 0xffffffffUL); tmp = tmp >> 32; } if (tmp != 0U) { DUK_ASSERT(i < DUK__BI_MAX_PARTS); x->v[i++] = (duk_uint32_t) tmp; } x->n = i; DUK_ASSERT(x->n <= DUK__BI_MAX_PARTS); /* no need to normalize */ DUK_ASSERT(duk__bi_is_valid(x)); } #else /* DUK_USE_64BIT_OPS */ DUK_LOCAL void duk__bi_add(duk__bigint *x, duk__bigint *y, duk__bigint *z) { duk_uint32_t carry, tmp1, tmp2; duk_small_int_t i, ny, nz; DUK_ASSERT(duk__bi_is_valid(y)); DUK_ASSERT(duk__bi_is_valid(z)); if (z->n > y->n) { duk__bigint *t; t = y; y = z; z = t; } DUK_ASSERT(y->n >= z->n); ny = y->n; nz = z->n; carry = 0U; for (i = 0; i < ny; i++) { /* Carry is detected based on wrapping which relies on exact 32-bit * types. */ DUK_ASSERT(i < DUK__BI_MAX_PARTS); tmp1 = y->v[i]; tmp2 = tmp1; if (i < nz) { tmp2 += z->v[i]; } /* Careful with carry condition: * - If carry not added: 0x12345678 + 0 + 0xffffffff = 0x12345677 (< 0x12345678) * - If carry added: 0x12345678 + 1 + 0xffffffff = 0x12345678 (== 0x12345678) */ if (carry) { tmp2++; carry = (tmp2 <= tmp1 ? 1U : 0U); } else { carry = (tmp2 < tmp1 ? 1U : 0U); } x->v[i] = tmp2; } if (carry) { DUK_ASSERT(i < DUK__BI_MAX_PARTS); DUK_ASSERT(carry == 1U); x->v[i++] = carry; } x->n = i; DUK_ASSERT(x->n <= DUK__BI_MAX_PARTS); /* no need to normalize */ DUK_ASSERT(duk__bi_is_valid(x)); } #endif /* DUK_USE_64BIT_OPS */ /* x <- y + z */ DUK_LOCAL void duk__bi_add_small(duk__bigint *x, duk__bigint *y, duk_uint32_t z) { duk__bigint tmp; DUK_ASSERT(duk__bi_is_valid(y)); /* XXX: this could be optimized; there is only one call site now though */ duk__bi_set_small(&tmp, z); duk__bi_add(x, y, &tmp); DUK_ASSERT(duk__bi_is_valid(x)); } #if 0 /* unused */ /* x <- x + y, use t as temp */ DUK_LOCAL void duk__bi_add_copy(duk__bigint *x, duk__bigint *y, duk__bigint *t) { duk__bi_add(t, x, y); duk__bi_copy(x, t); } #endif /* x <- y - z, require x >= y => z >= 0, i.e. y >= z */ #if defined(DUK_USE_64BIT_OPS) DUK_LOCAL void duk__bi_sub(duk__bigint *x, duk__bigint *y, duk__bigint *z) { duk_small_int_t i, ny, nz; duk_uint32_t ty, tz; duk_int64_t tmp; DUK_ASSERT(duk__bi_is_valid(y)); DUK_ASSERT(duk__bi_is_valid(z)); DUK_ASSERT(duk__bi_compare(y, z) >= 0); DUK_ASSERT(y->n >= z->n); ny = y->n; nz = z->n; tmp = 0; for (i = 0; i < ny; i++) { ty = y->v[i]; if (i < nz) { tz = z->v[i]; } else { tz = 0; } tmp = (duk_int64_t) ty - (duk_int64_t) tz + tmp; x->v[i] = (duk_uint32_t) ((duk_uint64_t) tmp & 0xffffffffUL); tmp = tmp >> 32; /* 0 or -1 */ } DUK_ASSERT(tmp == 0); x->n = i; duk__bi_normalize(x); /* need to normalize, may even cancel to 0 */ DUK_ASSERT(duk__bi_is_valid(x)); } #else DUK_LOCAL void duk__bi_sub(duk__bigint *x, duk__bigint *y, duk__bigint *z) { duk_small_int_t i, ny, nz; duk_uint32_t tmp1, tmp2, borrow; DUK_ASSERT(duk__bi_is_valid(y)); DUK_ASSERT(duk__bi_is_valid(z)); DUK_ASSERT(duk__bi_compare(y, z) >= 0); DUK_ASSERT(y->n >= z->n); ny = y->n; nz = z->n; borrow = 0U; for (i = 0; i < ny; i++) { /* Borrow is detected based on wrapping which relies on exact 32-bit * types. */ tmp1 = y->v[i]; tmp2 = tmp1; if (i < nz) { tmp2 -= z->v[i]; } /* Careful with borrow condition: * - If borrow not subtracted: 0x12345678 - 0 - 0xffffffff = 0x12345679 (> 0x12345678) * - If borrow subtracted: 0x12345678 - 1 - 0xffffffff = 0x12345678 (== 0x12345678) */ if (borrow) { tmp2--; borrow = (tmp2 >= tmp1 ? 1U : 0U); } else { borrow = (tmp2 > tmp1 ? 1U : 0U); } x->v[i] = tmp2; } DUK_ASSERT(borrow == 0U); x->n = i; duk__bi_normalize(x); /* need to normalize, may even cancel to 0 */ DUK_ASSERT(duk__bi_is_valid(x)); } #endif #if 0 /* unused */ /* x <- y - z */ DUK_LOCAL void duk__bi_sub_small(duk__bigint *x, duk__bigint *y, duk_uint32_t z) { duk__bigint tmp; DUK_ASSERT(duk__bi_is_valid(y)); /* XXX: this could be optimized */ duk__bi_set_small(&tmp, z); duk__bi_sub(x, y, &tmp); DUK_ASSERT(duk__bi_is_valid(x)); } #endif /* x <- x - y, use t as temp */ DUK_LOCAL void duk__bi_sub_copy(duk__bigint *x, duk__bigint *y, duk__bigint *t) { duk__bi_sub(t, x, y); duk__bi_copy(x, t); } /* x <- y * z */ DUK_LOCAL void duk__bi_mul(duk__bigint *x, duk__bigint *y, duk__bigint *z) { duk_small_int_t i, j, nx, nz; DUK_ASSERT(duk__bi_is_valid(y)); DUK_ASSERT(duk__bi_is_valid(z)); nx = y->n + z->n; /* max possible */ DUK_ASSERT(nx <= DUK__BI_MAX_PARTS); if (nx == 0) { /* Both inputs are zero; cases where only one is zero can go * through main algorithm. */ x->n = 0; return; } duk_memzero((void *) x->v, (size_t) (sizeof(duk_uint32_t) * (size_t) nx)); x->n = nx; nz = z->n; for (i = 0; i < y->n; i++) { #if defined(DUK_USE_64BIT_OPS) duk_uint64_t tmp = 0U; for (j = 0; j < nz; j++) { tmp += (duk_uint64_t) y->v[i] * (duk_uint64_t) z->v[j] + x->v[i+j]; x->v[i+j] = (duk_uint32_t) (tmp & 0xffffffffUL); tmp = tmp >> 32; } if (tmp > 0) { DUK_ASSERT(i + j < nx); DUK_ASSERT(i + j < DUK__BI_MAX_PARTS); DUK_ASSERT(x->v[i+j] == 0U); x->v[i+j] = (duk_uint32_t) tmp; } #else /* * Multiply + add + carry for 32-bit components using only 16x16->32 * multiplies and carry detection based on unsigned overflow. * * 1st mult, 32-bit: (A*2^16 + B) * 2nd mult, 32-bit: (C*2^16 + D) * 3rd add, 32-bit: E * 4th add, 32-bit: F * * (AC*2^16 + B) * (C*2^16 + D) + E + F * = AC*2^32 + AD*2^16 + BC*2^16 + BD + E + F * = AC*2^32 + (AD + BC)*2^16 + (BD + E + F) * = AC*2^32 + AD*2^16 + BC*2^16 + (BD + E + F) */ duk_uint32_t a, b, c, d, e, f; duk_uint32_t r, s, t; a = y->v[i]; b = a & 0xffffUL; a = a >> 16; f = 0; for (j = 0; j < nz; j++) { c = z->v[j]; d = c & 0xffffUL; c = c >> 16; e = x->v[i+j]; /* build result as: (r << 32) + s: start with (BD + E + F) */ r = 0; s = b * d; /* add E */ t = s + e; if (t < s) { r++; } /* carry */ s = t; /* add F */ t = s + f; if (t < s) { r++; } /* carry */ s = t; /* add BC*2^16 */ t = b * c; r += (t >> 16); t = s + ((t & 0xffffUL) << 16); if (t < s) { r++; } /* carry */ s = t; /* add AD*2^16 */ t = a * d; r += (t >> 16); t = s + ((t & 0xffffUL) << 16); if (t < s) { r++; } /* carry */ s = t; /* add AC*2^32 */ t = a * c; r += t; DUK_DDD(DUK_DDDPRINT("ab=%08lx cd=%08lx ef=%08lx -> rs=%08lx %08lx", (unsigned long) y->v[i], (unsigned long) z->v[j], (unsigned long) x->v[i+j], (unsigned long) r, (unsigned long) s)); x->v[i+j] = s; f = r; } if (f > 0U) { DUK_ASSERT(i + j < nx); DUK_ASSERT(i + j < DUK__BI_MAX_PARTS); DUK_ASSERT(x->v[i+j] == 0U); x->v[i+j] = (duk_uint32_t) f; } #endif /* DUK_USE_64BIT_OPS */ } duk__bi_normalize(x); DUK_ASSERT(duk__bi_is_valid(x)); } /* x <- y * z */ DUK_LOCAL void duk__bi_mul_small(duk__bigint *x, duk__bigint *y, duk_uint32_t z) { duk__bigint tmp; DUK_ASSERT(duk__bi_is_valid(y)); /* XXX: this could be optimized */ duk__bi_set_small(&tmp, z); duk__bi_mul(x, y, &tmp); DUK_ASSERT(duk__bi_is_valid(x)); } /* x <- x * y, use t as temp */ DUK_LOCAL void duk__bi_mul_copy(duk__bigint *x, duk__bigint *y, duk__bigint *t) { duk__bi_mul(t, x, y); duk__bi_copy(x, t); } /* x <- x * y, use t as temp */ DUK_LOCAL void duk__bi_mul_small_copy(duk__bigint *x, duk_uint32_t y, duk__bigint *t) { duk__bi_mul_small(t, x, y); duk__bi_copy(x, t); } DUK_LOCAL int duk__bi_is_even(duk__bigint *x) { DUK_ASSERT(duk__bi_is_valid(x)); return (x->n == 0) || ((x->v[0] & 0x01) == 0); } DUK_LOCAL int duk__bi_is_zero(duk__bigint *x) { DUK_ASSERT(duk__bi_is_valid(x)); return (x->n == 0); /* this is the case for normalized numbers */ } /* Bigint is 2^52. Used to detect normalized IEEE double mantissa values * which are at the lowest edge (next floating point value downwards has * a different exponent). The lowest mantissa has the form: * * 1000........000 (52 zeroes; only "hidden bit" is set) */ DUK_LOCAL duk_small_int_t duk__bi_is_2to52(duk__bigint *x) { DUK_ASSERT(duk__bi_is_valid(x)); return (duk_small_int_t) (x->n == 2) && (x->v[0] == 0U) && (x->v[1] == (1U << (52-32))); } /* x <- (1< 0); r = y % 32; duk_memzero((void *) x->v, sizeof(duk_uint32_t) * (size_t) n); x->n = n; x->v[n - 1] = (((duk_uint32_t) 1) << r); } /* x <- b^y; use t1 and t2 as temps */ DUK_LOCAL void duk__bi_exp_small(duk__bigint *x, duk_small_int_t b, duk_small_int_t y, duk__bigint *t1, duk__bigint *t2) { /* Fast path the binary case */ DUK_ASSERT(x != t1 && x != t2 && t1 != t2); /* distinct bignums, easy mistake to make */ DUK_ASSERT(b >= 0); DUK_ASSERT(y >= 0); if (b == 2) { duk__bi_twoexp(x, y); return; } /* http://en.wikipedia.org/wiki/Exponentiation_by_squaring */ DUK_DDD(DUK_DDDPRINT("exp_small: b=%ld, y=%ld", (long) b, (long) y)); duk__bi_set_small(x, 1); duk__bi_set_small(t1, (duk_uint32_t) b); for (;;) { /* Loop structure ensures that we don't compute t1^2 unnecessarily * on the final round, as that might create a bignum exceeding the * current DUK__BI_MAX_PARTS limit. */ if (y & 0x01) { duk__bi_mul_copy(x, t1, t2); } y = y >> 1; if (y == 0) { break; } duk__bi_mul_copy(t1, t1, t2); } DUK__BI_PRINT("exp_small result", x); } /* * A Dragon4 number-to-string variant, based on: * * Guy L. Steele Jr., Jon L. White: "How to Print Floating-Point Numbers * Accurately" * * Robert G. Burger, R. Kent Dybvig: "Printing Floating-Point Numbers * Quickly and Accurately" * * The current algorithm is based on Figure 1 of the Burger-Dybvig paper, * i.e. the base implementation without logarithm estimation speedups * (these would increase code footprint considerably). Fixed-format output * does not follow the suggestions in the paper; instead, we generate an * extra digit and round-with-carry. * * The same algorithm is used for number parsing (with b=10 and B=2) * by generating one extra digit and doing rounding manually. * * See doc/number-conversion.rst for limitations. */ /* Maximum number of digits generated. */ #define DUK__MAX_OUTPUT_DIGITS 1040 /* (Number.MAX_VALUE).toString(2).length == 1024, + slack */ /* Maximum number of characters in formatted value. */ #define DUK__MAX_FORMATTED_LENGTH 1040 /* (-Number.MAX_VALUE).toString(2).length == 1025, + slack */ /* Number and (minimum) size of bigints in the nc_ctx structure. */ #define DUK__NUMCONV_CTX_NUM_BIGINTS 7 #define DUK__NUMCONV_CTX_BIGINTS_SIZE (sizeof(duk__bigint) * DUK__NUMCONV_CTX_NUM_BIGINTS) typedef struct { /* Currently about 7*152 = 1064 bytes. The space for these * duk__bigints is used also as a temporary buffer for generating * the final string. This is a bit awkard; a union would be * more correct. */ duk__bigint f, r, s, mp, mm, t1, t2; duk_small_int_t is_s2n; /* if 1, doing a string-to-number; else doing a number-to-string */ duk_small_int_t is_fixed; /* if 1, doing a fixed format output (not free format) */ duk_small_int_t req_digits; /* requested number of output digits; 0 = free-format */ duk_small_int_t abs_pos; /* digit position is absolute, not relative */ duk_small_int_t e; /* exponent for 'f' */ duk_small_int_t b; /* input radix */ duk_small_int_t B; /* output radix */ duk_small_int_t k; /* see algorithm */ duk_small_int_t low_ok; /* see algorithm */ duk_small_int_t high_ok; /* see algorithm */ duk_small_int_t unequal_gaps; /* m+ != m- (very rarely) */ /* Buffer used for generated digits, values are in the range [0,B-1]. */ duk_uint8_t digits[DUK__MAX_OUTPUT_DIGITS]; duk_small_int_t count; /* digit count */ } duk__numconv_stringify_ctx; /* Note: computes with 'idx' in assertions, so caller beware. * 'idx' is preincremented, i.e. '1' on first call, because it * is more convenient for the caller. */ #define DUK__DRAGON4_OUTPUT_PREINC(nc_ctx,preinc_idx,x) do { \ DUK_ASSERT((preinc_idx) - 1 >= 0); \ DUK_ASSERT((preinc_idx) - 1 < DUK__MAX_OUTPUT_DIGITS); \ ((nc_ctx)->digits[(preinc_idx) - 1]) = (duk_uint8_t) (x); \ } while (0) DUK_LOCAL duk_size_t duk__dragon4_format_uint32(duk_uint8_t *buf, duk_uint32_t x, duk_small_int_t radix) { duk_uint8_t *p; duk_size_t len; duk_small_int_t dig; duk_uint32_t t; DUK_ASSERT(buf != NULL); DUK_ASSERT(radix >= 2 && radix <= 36); /* A 32-bit unsigned integer formats to at most 32 digits (the * worst case happens with radix == 2). Output the digits backwards, * and use a memmove() to get them in the right place. */ p = buf + 32; for (;;) { t = x / (duk_uint32_t) radix; dig = (duk_small_int_t) (x - t * (duk_uint32_t) radix); x = t; DUK_ASSERT(dig >= 0 && dig < 36); *(--p) = DUK__DIGITCHAR(dig); if (x == 0) { break; } } len = (duk_size_t) ((buf + 32) - p); duk_memmove((void *) buf, (const void *) p, (size_t) len); return len; } DUK_LOCAL void duk__dragon4_prepare(duk__numconv_stringify_ctx *nc_ctx) { duk_small_int_t lowest_mantissa; #if 1 /* Assume IEEE round-to-even, so that shorter encoding can be used * when round-to-even would produce correct result. By removing * this check (and having low_ok == high_ok == 0) the results would * still be accurate but in some cases longer than necessary. */ if (duk__bi_is_even(&nc_ctx->f)) { DUK_DDD(DUK_DDDPRINT("f is even")); nc_ctx->low_ok = 1; nc_ctx->high_ok = 1; } else { DUK_DDD(DUK_DDDPRINT("f is odd")); nc_ctx->low_ok = 0; nc_ctx->high_ok = 0; } #else /* Note: not honoring round-to-even should work but now generates incorrect * results. For instance, 1e23 serializes to "a000...", i.e. the first digit * equals the radix (10). Scaling stops one step too early in this case. * Don't know why this is the case, but since this code path is unused, it * doesn't matter. */ nc_ctx->low_ok = 0; nc_ctx->high_ok = 0; #endif /* For string-to-number, pretend we never have the lowest mantissa as there * is no natural "precision" for inputs. Having lowest_mantissa == 0, we'll * fall into the base cases for both e >= 0 and e < 0. */ if (nc_ctx->is_s2n) { lowest_mantissa = 0; } else { lowest_mantissa = duk__bi_is_2to52(&nc_ctx->f); } nc_ctx->unequal_gaps = 0; if (nc_ctx->e >= 0) { /* exponent non-negative (and thus not minimum exponent) */ if (lowest_mantissa) { /* (>= e 0) AND (= f (expt b (- p 1))) * * be <- (expt b e) == b^e * be1 <- (* be b) == (expt b (+ e 1)) == b^(e+1) * r <- (* f be1 2) == 2 * f * b^(e+1) [if b==2 -> f * b^(e+2)] * s <- (* b 2) [if b==2 -> 4] * m+ <- be1 == b^(e+1) * m- <- be == b^e * k <- 0 * B <- B * low_ok <- round * high_ok <- round */ DUK_DDD(DUK_DDDPRINT("non-negative exponent (not smallest exponent); " "lowest mantissa value for this exponent -> " "unequal gaps")); duk__bi_exp_small(&nc_ctx->mm, nc_ctx->b, nc_ctx->e, &nc_ctx->t1, &nc_ctx->t2); /* mm <- b^e */ duk__bi_mul_small(&nc_ctx->mp, &nc_ctx->mm, (duk_uint32_t) nc_ctx->b); /* mp <- b^(e+1) */ duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->f, 2); duk__bi_mul(&nc_ctx->r, &nc_ctx->t1, &nc_ctx->mp); /* r <- (2 * f) * b^(e+1) */ duk__bi_set_small(&nc_ctx->s, (duk_uint32_t) (nc_ctx->b * 2)); /* s <- 2 * b */ nc_ctx->unequal_gaps = 1; } else { /* (>= e 0) AND (not (= f (expt b (- p 1)))) * * be <- (expt b e) == b^e * r <- (* f be 2) == 2 * f * b^e [if b==2 -> f * b^(e+1)] * s <- 2 * m+ <- be == b^e * m- <- be == b^e * k <- 0 * B <- B * low_ok <- round * high_ok <- round */ DUK_DDD(DUK_DDDPRINT("non-negative exponent (not smallest exponent); " "not lowest mantissa for this exponent -> " "equal gaps")); duk__bi_exp_small(&nc_ctx->mm, nc_ctx->b, nc_ctx->e, &nc_ctx->t1, &nc_ctx->t2); /* mm <- b^e */ duk__bi_copy(&nc_ctx->mp, &nc_ctx->mm); /* mp <- b^e */ duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->f, 2); duk__bi_mul(&nc_ctx->r, &nc_ctx->t1, &nc_ctx->mp); /* r <- (2 * f) * b^e */ duk__bi_set_small(&nc_ctx->s, 2); /* s <- 2 */ } } else { /* When doing string-to-number, lowest_mantissa is always 0 so * the exponent check, while incorrect, won't matter. */ if (nc_ctx->e > DUK__IEEE_DOUBLE_EXP_MIN /*not minimum exponent*/ && lowest_mantissa /* lowest mantissa for this exponent*/) { /* r <- (* f b 2) [if b==2 -> (* f 4)] * s <- (* (expt b (- 1 e)) 2) == b^(1-e) * 2 [if b==2 -> b^(2-e)] * m+ <- b == 2 * m- <- 1 * k <- 0 * B <- B * low_ok <- round * high_ok <- round */ DUK_DDD(DUK_DDDPRINT("negative exponent; not minimum exponent and " "lowest mantissa for this exponent -> " "unequal gaps")); duk__bi_mul_small(&nc_ctx->r, &nc_ctx->f, (duk_uint32_t) (nc_ctx->b * 2)); /* r <- (2 * b) * f */ duk__bi_exp_small(&nc_ctx->t1, nc_ctx->b, 1 - nc_ctx->e, &nc_ctx->s, &nc_ctx->t2); /* NB: use 's' as temp on purpose */ duk__bi_mul_small(&nc_ctx->s, &nc_ctx->t1, 2); /* s <- b^(1-e) * 2 */ duk__bi_set_small(&nc_ctx->mp, 2); duk__bi_set_small(&nc_ctx->mm, 1); nc_ctx->unequal_gaps = 1; } else { /* r <- (* f 2) * s <- (* (expt b (- e)) 2) == b^(-e) * 2 [if b==2 -> b^(1-e)] * m+ <- 1 * m- <- 1 * k <- 0 * B <- B * low_ok <- round * high_ok <- round */ DUK_DDD(DUK_DDDPRINT("negative exponent; minimum exponent or not " "lowest mantissa for this exponent -> " "equal gaps")); duk__bi_mul_small(&nc_ctx->r, &nc_ctx->f, 2); /* r <- 2 * f */ duk__bi_exp_small(&nc_ctx->t1, nc_ctx->b, -nc_ctx->e, &nc_ctx->s, &nc_ctx->t2); /* NB: use 's' as temp on purpose */ duk__bi_mul_small(&nc_ctx->s, &nc_ctx->t1, 2); /* s <- b^(-e) * 2 */ duk__bi_set_small(&nc_ctx->mp, 1); duk__bi_set_small(&nc_ctx->mm, 1); } } } DUK_LOCAL void duk__dragon4_scale(duk__numconv_stringify_ctx *nc_ctx) { duk_small_int_t k = 0; /* This is essentially the 'scale' algorithm, with recursion removed. * Note that 'k' is either correct immediately, or will move in one * direction in the loop. There's no need to do the low/high checks * on every round (like the Scheme algorithm does). * * The scheme algorithm finds 'k' and updates 's' simultaneously, * while the logical algorithm finds 'k' with 's' having its initial * value, after which 's' is updated separately (see the Burger-Dybvig * paper, Section 3.1, steps 2 and 3). * * The case where m+ == m- (almost always) is optimized for, because * it reduces the bigint operations considerably and almost always * applies. The scale loop only needs to work with m+, so this works. */ /* XXX: this algorithm could be optimized quite a lot by using e.g. * a logarithm based estimator for 'k' and performing B^n multiplication * using a lookup table or using some bit-representation based exp * algorithm. Currently we just loop, with significant performance * impact for very large and very small numbers. */ DUK_DDD(DUK_DDDPRINT("scale: B=%ld, low_ok=%ld, high_ok=%ld", (long) nc_ctx->B, (long) nc_ctx->low_ok, (long) nc_ctx->high_ok)); DUK__BI_PRINT("r(init)", &nc_ctx->r); DUK__BI_PRINT("s(init)", &nc_ctx->s); DUK__BI_PRINT("mp(init)", &nc_ctx->mp); DUK__BI_PRINT("mm(init)", &nc_ctx->mm); for (;;) { DUK_DDD(DUK_DDDPRINT("scale loop (inc k), k=%ld", (long) k)); DUK__BI_PRINT("r", &nc_ctx->r); DUK__BI_PRINT("s", &nc_ctx->s); DUK__BI_PRINT("m+", &nc_ctx->mp); DUK__BI_PRINT("m-", &nc_ctx->mm); duk__bi_add(&nc_ctx->t1, &nc_ctx->r, &nc_ctx->mp); /* t1 = (+ r m+) */ if (duk__bi_compare(&nc_ctx->t1, &nc_ctx->s) >= (nc_ctx->high_ok ? 0 : 1)) { DUK_DDD(DUK_DDDPRINT("k is too low")); /* r <- r * s <- (* s B) * m+ <- m+ * m- <- m- * k <- (+ k 1) */ duk__bi_mul_small_copy(&nc_ctx->s, (duk_uint32_t) nc_ctx->B, &nc_ctx->t1); k++; } else { break; } } /* k > 0 -> k was too low, and cannot be too high */ if (k > 0) { goto skip_dec_k; } for (;;) { DUK_DDD(DUK_DDDPRINT("scale loop (dec k), k=%ld", (long) k)); DUK__BI_PRINT("r", &nc_ctx->r); DUK__BI_PRINT("s", &nc_ctx->s); DUK__BI_PRINT("m+", &nc_ctx->mp); DUK__BI_PRINT("m-", &nc_ctx->mm); duk__bi_add(&nc_ctx->t1, &nc_ctx->r, &nc_ctx->mp); /* t1 = (+ r m+) */ duk__bi_mul_small(&nc_ctx->t2, &nc_ctx->t1, (duk_uint32_t) nc_ctx->B); /* t2 = (* (+ r m+) B) */ if (duk__bi_compare(&nc_ctx->t2, &nc_ctx->s) <= (nc_ctx->high_ok ? -1 : 0)) { DUK_DDD(DUK_DDDPRINT("k is too high")); /* r <- (* r B) * s <- s * m+ <- (* m+ B) * m- <- (* m- B) * k <- (- k 1) */ duk__bi_mul_small_copy(&nc_ctx->r, (duk_uint32_t) nc_ctx->B, &nc_ctx->t1); duk__bi_mul_small_copy(&nc_ctx->mp, (duk_uint32_t) nc_ctx->B, &nc_ctx->t1); if (nc_ctx->unequal_gaps) { DUK_DDD(DUK_DDDPRINT("m+ != m- -> need to update m- too")); duk__bi_mul_small_copy(&nc_ctx->mm, (duk_uint32_t) nc_ctx->B, &nc_ctx->t1); } k--; } else { break; } } skip_dec_k: if (!nc_ctx->unequal_gaps) { DUK_DDD(DUK_DDDPRINT("equal gaps, copy m- from m+")); duk__bi_copy(&nc_ctx->mm, &nc_ctx->mp); /* mm <- mp */ } nc_ctx->k = k; DUK_DDD(DUK_DDDPRINT("final k: %ld", (long) k)); DUK__BI_PRINT("r(final)", &nc_ctx->r); DUK__BI_PRINT("s(final)", &nc_ctx->s); DUK__BI_PRINT("mp(final)", &nc_ctx->mp); DUK__BI_PRINT("mm(final)", &nc_ctx->mm); } DUK_LOCAL void duk__dragon4_generate(duk__numconv_stringify_ctx *nc_ctx) { duk_small_int_t tc1, tc2; /* terminating conditions */ duk_small_int_t d; /* current digit */ duk_small_int_t count = 0; /* digit count */ /* * Digit generation loop. * * Different termination conditions: * * 1. Free format output. Terminate when shortest accurate * representation found. * * 2. Fixed format output, with specific number of digits. * Ignore termination conditions, terminate when digits * generated. Caller requests an extra digit and rounds. * * 3. Fixed format output, with a specific absolute cut-off * position (e.g. 10 digits after decimal point). Note * that we always generate at least one digit, even if * the digit is below the cut-off point already. */ for (;;) { DUK_DDD(DUK_DDDPRINT("generate loop, count=%ld, k=%ld, B=%ld, low_ok=%ld, high_ok=%ld", (long) count, (long) nc_ctx->k, (long) nc_ctx->B, (long) nc_ctx->low_ok, (long) nc_ctx->high_ok)); DUK__BI_PRINT("r", &nc_ctx->r); DUK__BI_PRINT("s", &nc_ctx->s); DUK__BI_PRINT("m+", &nc_ctx->mp); DUK__BI_PRINT("m-", &nc_ctx->mm); /* (quotient-remainder (* r B) s) using a dummy subtraction loop */ duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->r, (duk_uint32_t) nc_ctx->B); /* t1 <- (* r B) */ d = 0; for (;;) { if (duk__bi_compare(&nc_ctx->t1, &nc_ctx->s) < 0) { break; } duk__bi_sub_copy(&nc_ctx->t1, &nc_ctx->s, &nc_ctx->t2); /* t1 <- t1 - s */ d++; } duk__bi_copy(&nc_ctx->r, &nc_ctx->t1); /* r <- (remainder (* r B) s) */ /* d <- (quotient (* r B) s) (in range 0...B-1) */ DUK_DDD(DUK_DDDPRINT("-> d(quot)=%ld", (long) d)); DUK__BI_PRINT("r(rem)", &nc_ctx->r); duk__bi_mul_small_copy(&nc_ctx->mp, (duk_uint32_t) nc_ctx->B, &nc_ctx->t2); /* m+ <- (* m+ B) */ duk__bi_mul_small_copy(&nc_ctx->mm, (duk_uint32_t) nc_ctx->B, &nc_ctx->t2); /* m- <- (* m- B) */ DUK__BI_PRINT("mp(upd)", &nc_ctx->mp); DUK__BI_PRINT("mm(upd)", &nc_ctx->mm); /* Terminating conditions. For fixed width output, we just ignore the * terminating conditions (and pretend that tc1 == tc2 == false). The * the current shortcut for fixed-format output is to generate a few * extra digits and use rounding (with carry) to finish the output. */ if (nc_ctx->is_fixed == 0) { /* free-form */ tc1 = (duk__bi_compare(&nc_ctx->r, &nc_ctx->mm) <= (nc_ctx->low_ok ? 0 : -1)); duk__bi_add(&nc_ctx->t1, &nc_ctx->r, &nc_ctx->mp); /* t1 <- (+ r m+) */ tc2 = (duk__bi_compare(&nc_ctx->t1, &nc_ctx->s) >= (nc_ctx->high_ok ? 0 : 1)); DUK_DDD(DUK_DDDPRINT("tc1=%ld, tc2=%ld", (long) tc1, (long) tc2)); } else { /* fixed-format */ tc1 = 0; tc2 = 0; } /* Count is incremented before DUK__DRAGON4_OUTPUT_PREINC() call * on purpose, which is taken into account by the macro. */ count++; if (tc1) { if (tc2) { /* tc1 = true, tc2 = true */ duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->r, 2); if (duk__bi_compare(&nc_ctx->t1, &nc_ctx->s) < 0) { /* (< (* r 2) s) */ DUK_DDD(DUK_DDDPRINT("tc1=true, tc2=true, 2r > s: output d --> %ld (k=%ld)", (long) d, (long) nc_ctx->k)); DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d); } else { DUK_DDD(DUK_DDDPRINT("tc1=true, tc2=true, 2r <= s: output d+1 --> %ld (k=%ld)", (long) (d + 1), (long) nc_ctx->k)); DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d + 1); } break; } else { /* tc1 = true, tc2 = false */ DUK_DDD(DUK_DDDPRINT("tc1=true, tc2=false: output d --> %ld (k=%ld)", (long) d, (long) nc_ctx->k)); DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d); break; } } else { if (tc2) { /* tc1 = false, tc2 = true */ DUK_DDD(DUK_DDDPRINT("tc1=false, tc2=true: output d+1 --> %ld (k=%ld)", (long) (d + 1), (long) nc_ctx->k)); DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d + 1); break; } else { /* tc1 = false, tc2 = false */ DUK_DDD(DUK_DDDPRINT("tc1=false, tc2=false: output d --> %ld (k=%ld)", (long) d, (long) nc_ctx->k)); DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d); /* r <- r (updated above: r <- (remainder (* r B) s) * s <- s * m+ <- m+ (updated above: m+ <- (* m+ B) * m- <- m- (updated above: m- <- (* m- B) * B, low_ok, high_ok are fixed */ /* fall through and continue for-loop */ } } /* fixed-format termination conditions */ if (nc_ctx->is_fixed) { if (nc_ctx->abs_pos) { int pos = nc_ctx->k - count + 1; /* count is already incremented, take into account */ DUK_DDD(DUK_DDDPRINT("fixed format, absolute: abs pos=%ld, k=%ld, count=%ld, req=%ld", (long) pos, (long) nc_ctx->k, (long) count, (long) nc_ctx->req_digits)); if (pos <= nc_ctx->req_digits) { DUK_DDD(DUK_DDDPRINT("digit position reached req_digits, end generate loop")); break; } } else { DUK_DDD(DUK_DDDPRINT("fixed format, relative: k=%ld, count=%ld, req=%ld", (long) nc_ctx->k, (long) count, (long) nc_ctx->req_digits)); if (count >= nc_ctx->req_digits) { DUK_DDD(DUK_DDDPRINT("digit count reached req_digits, end generate loop")); break; } } } } /* for */ nc_ctx->count = count; DUK_DDD(DUK_DDDPRINT("generate finished")); #if defined(DUK_USE_DEBUG_LEVEL) && (DUK_USE_DEBUG_LEVEL >= 2) { duk_uint8_t buf[2048]; duk_small_int_t i, t; duk_memzero(buf, sizeof(buf)); for (i = 0; i < nc_ctx->count; i++) { t = nc_ctx->digits[i]; if (t < 0 || t > 36) { buf[i] = (duk_uint8_t) '?'; } else { buf[i] = (duk_uint8_t) DUK__DIGITCHAR(t); } } DUK_DDD(DUK_DDDPRINT("-> generated digits; k=%ld, digits='%s'", (long) nc_ctx->k, (const char *) buf)); } #endif } /* Round up digits to a given position. If position is out-of-bounds, * does nothing. If carry propagates over the first digit, a '1' is * prepended to digits and 'k' will be updated. Return value indicates * whether carry propagated over the first digit. * * Note that nc_ctx->count is NOT updated based on the rounding position * (it is updated only if carry overflows over the first digit and an * extra digit is prepended). */ DUK_LOCAL duk_small_int_t duk__dragon4_fixed_format_round(duk__numconv_stringify_ctx *nc_ctx, duk_small_int_t round_idx) { duk_small_int_t t; duk_uint8_t *p; duk_uint8_t roundup_limit; duk_small_int_t ret = 0; /* * round_idx points to the digit which is considered for rounding; the * digit to its left is the final digit of the rounded value. If round_idx * is zero, rounding will be performed; the result will either be an empty * rounded value or if carry happens a '1' digit is generated. */ if (round_idx >= nc_ctx->count) { DUK_DDD(DUK_DDDPRINT("round_idx out of bounds (%ld >= %ld (count)) -> no rounding", (long) round_idx, (long) nc_ctx->count)); return 0; } else if (round_idx < 0) { DUK_DDD(DUK_DDDPRINT("round_idx out of bounds (%ld < 0) -> no rounding", (long) round_idx)); return 0; } /* * Round-up limit. * * For even values, divides evenly, e.g. 10 -> roundup_limit=5. * * For odd values, rounds up, e.g. 3 -> roundup_limit=2. * If radix is 3, 0/3 -> down, 1/3 -> down, 2/3 -> up. */ roundup_limit = (duk_uint8_t) ((nc_ctx->B + 1) / 2); p = &nc_ctx->digits[round_idx]; if (*p >= roundup_limit) { DUK_DDD(DUK_DDDPRINT("fixed-format rounding carry required")); /* carry */ for (;;) { *p = 0; if (p == &nc_ctx->digits[0]) { DUK_DDD(DUK_DDDPRINT("carry propagated to first digit -> special case handling")); duk_memmove((void *) (&nc_ctx->digits[1]), (const void *) (&nc_ctx->digits[0]), (size_t) (sizeof(char) * (size_t) nc_ctx->count)); nc_ctx->digits[0] = 1; /* don't increase 'count' */ nc_ctx->k++; /* position of highest digit changed */ nc_ctx->count++; /* number of digits changed */ ret = 1; break; } DUK_DDD(DUK_DDDPRINT("fixed-format rounding carry: B=%ld, roundup_limit=%ld, p=%p, digits=%p", (long) nc_ctx->B, (long) roundup_limit, (void *) p, (void *) nc_ctx->digits)); p--; t = *p; DUK_DDD(DUK_DDDPRINT("digit before carry: %ld", (long) t)); if (++t < nc_ctx->B) { DUK_DDD(DUK_DDDPRINT("rounding carry terminated")); *p = (duk_uint8_t) t; break; } DUK_DDD(DUK_DDDPRINT("wraps, carry to next digit")); } } return ret; } #define DUK__NO_EXP (65536) /* arbitrary marker, outside valid exp range */ DUK_LOCAL void duk__dragon4_convert_and_push(duk__numconv_stringify_ctx *nc_ctx, duk_hthread *thr, duk_small_int_t radix, duk_small_int_t digits, duk_small_uint_t flags, duk_small_int_t neg) { duk_small_int_t k; duk_small_int_t pos, pos_end; duk_small_int_t expt; duk_small_int_t dig; duk_uint8_t *q; duk_uint8_t *buf; /* * The string conversion here incorporates all the necessary ECMAScript * semantics without attempting to be generic. nc_ctx->digits contains * nc_ctx->count digits (>= 1), with the topmost digit's 'position' * indicated by nc_ctx->k as follows: * * digits="123" count=3 k=0 --> 0.123 * digits="123" count=3 k=1 --> 1.23 * digits="123" count=3 k=5 --> 12300 * digits="123" count=3 k=-1 --> 0.0123 * * Note that the identifier names used for format selection are different * in Burger-Dybvig paper and ECMAScript specification (quite confusingly * so, because e.g. 'k' has a totally different meaning in each). See * documentation for discussion. * * ECMAScript doesn't specify any specific behavior for format selection * (e.g. when to use exponent notation) for non-base-10 numbers. * * The bigint space in the context is reused for string output, as there * is more than enough space for that (>1kB at the moment), and we avoid * allocating even more stack. */ DUK_ASSERT(DUK__NUMCONV_CTX_BIGINTS_SIZE >= DUK__MAX_FORMATTED_LENGTH); DUK_ASSERT(nc_ctx->count >= 1); k = nc_ctx->k; buf = (duk_uint8_t *) &nc_ctx->f; /* XXX: union would be more correct */ q = buf; /* Exponent handling: if exponent format is used, record exponent value and * fake k such that one leading digit is generated (e.g. digits=123 -> "1.23"). * * toFixed() prevents exponent use; otherwise apply a set of criteria to * match the other API calls (toString(), toPrecision, etc). */ expt = DUK__NO_EXP; if (!nc_ctx->abs_pos /* toFixed() */) { if ((flags & DUK_N2S_FLAG_FORCE_EXP) || /* exponential notation forced */ ((flags & DUK_N2S_FLAG_NO_ZERO_PAD) && /* fixed precision and zero padding would be required */ (k - digits >= 1)) || /* (e.g. k=3, digits=2 -> "12X") */ ((k > 21 || k <= -6) && (radix == 10))) { /* toString() conditions */ DUK_DDD(DUK_DDDPRINT("use exponential notation: k=%ld -> expt=%ld", (long) k, (long) (k - 1))); expt = k - 1; /* e.g. 12.3 -> digits="123" k=2 -> 1.23e1 */ k = 1; /* generate mantissa with a single leading whole number digit */ } } if (neg) { *q++ = '-'; } /* Start position (inclusive) and end position (exclusive) */ pos = (k >= 1 ? k : 1); if (nc_ctx->is_fixed) { if (nc_ctx->abs_pos) { /* toFixed() */ pos_end = -digits; } else { pos_end = k - digits; } } else { pos_end = k - nc_ctx->count; } if (pos_end > 0) { pos_end = 0; } DUK_DDD(DUK_DDDPRINT("expt=%ld, k=%ld, count=%ld, pos=%ld, pos_end=%ld, is_fixed=%ld, " "digits=%ld, abs_pos=%ld", (long) expt, (long) k, (long) nc_ctx->count, (long) pos, (long) pos_end, (long) nc_ctx->is_fixed, (long) digits, (long) nc_ctx->abs_pos)); /* Digit generation */ while (pos > pos_end) { DUK_DDD(DUK_DDDPRINT("digit generation: pos=%ld, pos_end=%ld", (long) pos, (long) pos_end)); if (pos == 0) { *q++ = (duk_uint8_t) '.'; } if (pos > k) { *q++ = (duk_uint8_t) '0'; } else if (pos <= k - nc_ctx->count) { *q++ = (duk_uint8_t) '0'; } else { dig = nc_ctx->digits[k - pos]; DUK_ASSERT(dig >= 0 && dig < nc_ctx->B); *q++ = (duk_uint8_t) DUK__DIGITCHAR(dig); } pos--; } DUK_ASSERT(pos <= 1); /* Exponent */ if (expt != DUK__NO_EXP) { /* * Exponent notation for non-base-10 numbers isn't specified in ECMAScript * specification, as it never explicitly turns up: non-decimal numbers can * only be formatted with Number.prototype.toString([radix]) and for that, * behavior is not explicitly specified. * * Logical choices include formatting the exponent as decimal (e.g. binary * 100000 as 1e+5) or in current radix (e.g. binary 100000 as 1e+101). * The Dragon4 algorithm (in the original paper) prints the exponent value * in the target radix B. However, for radix values 15 and above, the * exponent separator 'e' is no longer easily parseable. Consider, for * instance, the number "1.faecee+1c". */ duk_size_t len; char expt_sign; *q++ = 'e'; if (expt >= 0) { expt_sign = '+'; } else { expt_sign = '-'; expt = -expt; } *q++ = (duk_uint8_t) expt_sign; len = duk__dragon4_format_uint32(q, (duk_uint32_t) expt, radix); q += len; } duk_push_lstring(thr, (const char *) buf, (size_t) (q - buf)); } /* * Conversion helpers */ DUK_LOCAL void duk__dragon4_double_to_ctx(duk__numconv_stringify_ctx *nc_ctx, duk_double_t x) { duk_double_union u; duk_uint32_t tmp; duk_small_int_t expt; /* * seeeeeee eeeeffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff * A B C D E F G H * * s sign bit * eee... exponent field * fff... fraction * * ieee value = 1.ffff... * 2^(e - 1023) (normal) * = 0.ffff... * 2^(-1022) (denormal) * * algorithm v = f * b^e */ DUK_DBLUNION_SET_DOUBLE(&u, x); nc_ctx->f.n = 2; tmp = DUK_DBLUNION_GET_LOW32(&u); nc_ctx->f.v[0] = tmp; tmp = DUK_DBLUNION_GET_HIGH32(&u); nc_ctx->f.v[1] = tmp & 0x000fffffUL; expt = (duk_small_int_t) ((tmp >> 20) & 0x07ffUL); if (expt == 0) { /* denormal */ expt = DUK__IEEE_DOUBLE_EXP_MIN - 52; duk__bi_normalize(&nc_ctx->f); } else { /* normal: implicit leading 1-bit */ nc_ctx->f.v[1] |= 0x00100000UL; expt = expt - DUK__IEEE_DOUBLE_EXP_BIAS - 52; DUK_ASSERT(duk__bi_is_valid(&nc_ctx->f)); /* true, because v[1] has at least one bit set */ } DUK_ASSERT(duk__bi_is_valid(&nc_ctx->f)); nc_ctx->e = expt; } DUK_LOCAL void duk__dragon4_ctx_to_double(duk__numconv_stringify_ctx *nc_ctx, duk_double_t *x) { duk_double_union u; duk_small_int_t expt; duk_small_int_t i; duk_small_int_t bitstart; duk_small_int_t bitround; duk_small_int_t bitidx; duk_small_int_t skip_round; duk_uint32_t t, v; DUK_ASSERT(nc_ctx->count == 53 + 1); /* Sometimes this assert is not true right now; it will be true after * rounding. See: test-bug-numconv-mantissa-assert.js. */ DUK_ASSERT_DISABLE(nc_ctx->digits[0] == 1); /* zero handled by caller */ /* Should not be required because the code below always sets both high * and low parts, but at least gcc-4.4.5 fails to deduce this correctly * (perhaps because the low part is set (seemingly) conditionally in a * loop), so this is here to avoid the bogus warning. */ duk_memzero((void *) &u, sizeof(u)); /* * Figure out how generated digits match up with the mantissa, * and then perform rounding. If mantissa overflows, need to * recompute the exponent (it is bumped and may overflow to * infinity). * * For normal numbers the leading '1' is hidden and ignored, * and the last bit is used for rounding: * * rounding pt * <--------52------->| * 1 x x x x ... x x x x|y ==> x x x x ... x x x x * * For denormals, the leading '1' is included in the number, * and the rounding point is different: * * rounding pt * <--52 or less--->| * 1 x x x x ... x x|x x y ==> 0 0 ... 1 x x ... x x * * The largest denormals will have a mantissa beginning with * a '1' (the explicit leading bit); smaller denormals will * have leading zero bits. * * If the exponent would become too high, the result becomes * Infinity. If the exponent is so small that the entire * mantissa becomes zero, the result becomes zero. * * Note: the Dragon4 'k' is off-by-one with respect to the IEEE * exponent. For instance, k==0 indicates that the leading '1' * digit is at the first binary fraction position (0.1xxx...); * the corresponding IEEE exponent would be -1. */ skip_round = 0; recheck_exp: expt = nc_ctx->k - 1; /* IEEE exp without bias */ if (expt > 1023) { /* Infinity */ bitstart = -255; /* needed for inf: causes mantissa to become zero, * and rounding to be skipped. */ expt = 2047; } else if (expt >= -1022) { /* normal */ bitstart = 1; /* skip leading digit */ expt += DUK__IEEE_DOUBLE_EXP_BIAS; DUK_ASSERT(expt >= 1 && expt <= 2046); } else { /* denormal or zero */ bitstart = 1023 + expt; /* expt==-1023 -> bitstart=0 (leading 1); * expt==-1024 -> bitstart=-1 (one left of leading 1), etc */ expt = 0; } bitround = bitstart + 52; DUK_DDD(DUK_DDDPRINT("ieee expt=%ld, bitstart=%ld, bitround=%ld", (long) expt, (long) bitstart, (long) bitround)); if (!skip_round) { if (duk__dragon4_fixed_format_round(nc_ctx, bitround)) { /* Corner case: see test-numconv-parse-mant-carry.js. We could * just bump the exponent and update bitstart, but it's more robust * to recompute (but avoid rounding twice). */ DUK_DDD(DUK_DDDPRINT("rounding caused exponent to be bumped, recheck exponent")); skip_round = 1; goto recheck_exp; } } /* * Create mantissa */ t = 0; for (i = 0; i < 52; i++) { bitidx = bitstart + 52 - 1 - i; if (bitidx >= nc_ctx->count) { v = 0; } else if (bitidx < 0) { v = 0; } else { v = nc_ctx->digits[bitidx]; } DUK_ASSERT(v == 0 || v == 1); t += v << (i % 32); if (i == 31) { /* low 32 bits is complete */ DUK_DBLUNION_SET_LOW32(&u, t); t = 0; } } /* t has high mantissa */ DUK_DDD(DUK_DDDPRINT("mantissa is complete: %08lx %08lx", (unsigned long) t, (unsigned long) DUK_DBLUNION_GET_LOW32(&u))); DUK_ASSERT(expt >= 0 && expt <= 0x7ffL); t += ((duk_uint32_t) expt) << 20; #if 0 /* caller handles sign change */ if (negative) { t |= 0x80000000U; } #endif DUK_DBLUNION_SET_HIGH32(&u, t); DUK_DDD(DUK_DDDPRINT("number is complete: %08lx %08lx", (unsigned long) DUK_DBLUNION_GET_HIGH32(&u), (unsigned long) DUK_DBLUNION_GET_LOW32(&u))); *x = DUK_DBLUNION_GET_DOUBLE(&u); } /* * Exposed number-to-string API * * Input: [ number ] * Output: [ string ] */ DUK_LOCAL DUK_NOINLINE void duk__numconv_stringify_raw(duk_hthread *thr, duk_small_int_t radix, duk_small_int_t digits, duk_small_uint_t flags) { duk_double_t x; duk_small_int_t c; duk_small_int_t neg; duk_uint32_t uval; duk__numconv_stringify_ctx nc_ctx_alloc; /* large context; around 2kB now */ duk__numconv_stringify_ctx *nc_ctx = &nc_ctx_alloc; x = (duk_double_t) duk_require_number(thr, -1); duk_pop(thr); /* * Handle special cases (NaN, infinity, zero). */ c = (duk_small_int_t) DUK_FPCLASSIFY(x); if (DUK_SIGNBIT((double) x)) { x = -x; neg = 1; } else { neg = 0; } /* NaN sign bit is platform specific with unpacked, un-normalized NaNs */ DUK_ASSERT(c == DUK_FP_NAN || DUK_SIGNBIT((double) x) == 0); if (c == DUK_FP_NAN) { duk_push_hstring_stridx(thr, DUK_STRIDX_NAN); return; } else if (c == DUK_FP_INFINITE) { if (neg) { /* -Infinity */ duk_push_hstring_stridx(thr, DUK_STRIDX_MINUS_INFINITY); } else { /* Infinity */ duk_push_hstring_stridx(thr, DUK_STRIDX_INFINITY); } return; } else if (c == DUK_FP_ZERO) { /* We can't shortcut zero here if it goes through special formatting * (such as forced exponential notation). */ ; } /* * Handle integers in 32-bit range (that is, [-(2**32-1),2**32-1]) * specially, as they're very likely for embedded programs. This * is now done for all radix values. We must be careful not to use * the fast path when special formatting (e.g. forced exponential) * is in force. * * XXX: could save space by supporting radix 10 only and using * sprintf "%lu" for the fast path and for exponent formatting. */ uval = duk_double_to_uint32_t(x); if (((double) uval) == x && /* integer number in range */ flags == 0) { /* no special formatting */ /* use bigint area as a temp */ duk_uint8_t *buf = (duk_uint8_t *) (&nc_ctx->f); duk_uint8_t *p = buf; DUK_ASSERT(DUK__NUMCONV_CTX_BIGINTS_SIZE >= 32 + 1); /* max size: radix=2 + sign */ if (neg && uval != 0) { /* no negative sign for zero */ *p++ = (duk_uint8_t) '-'; } p += duk__dragon4_format_uint32(p, uval, radix); duk_push_lstring(thr, (const char *) buf, (duk_size_t) (p - buf)); return; } /* * Dragon4 setup. * * Convert double from IEEE representation for conversion; * normal finite values have an implicit leading 1-bit. The * slow path algorithm doesn't handle zero, so zero is special * cased here but still creates a valid nc_ctx, and goes * through normal formatting in case special formatting has * been requested (e.g. forced exponential format: 0 -> "0e+0"). */ /* Would be nice to bulk clear the allocation, but the context * is 1-2 kilobytes and nothing should rely on it being zeroed. */ #if 0 duk_memzero((void *) nc_ctx, sizeof(*nc_ctx)); /* slow init, do only for slow path cases */ #endif nc_ctx->is_s2n = 0; nc_ctx->b = 2; nc_ctx->B = radix; nc_ctx->abs_pos = 0; if (flags & DUK_N2S_FLAG_FIXED_FORMAT) { nc_ctx->is_fixed = 1; if (flags & DUK_N2S_FLAG_FRACTION_DIGITS) { /* absolute req_digits; e.g. digits = 1 -> last digit is 0, * but add an extra digit for rounding. */ nc_ctx->abs_pos = 1; nc_ctx->req_digits = (-digits + 1) - 1; } else { nc_ctx->req_digits = digits + 1; } } else { nc_ctx->is_fixed = 0; nc_ctx->req_digits = 0; } if (c == DUK_FP_ZERO) { /* Zero special case: fake requested number of zero digits; ensure * no sign bit is printed. Relative and absolute fixed format * require separate handling. */ duk_small_int_t count; if (nc_ctx->is_fixed) { if (nc_ctx->abs_pos) { count = digits + 2; /* lead zero + 'digits' fractions + 1 for rounding */ } else { count = digits + 1; /* + 1 for rounding */ } } else { count = 1; } DUK_DDD(DUK_DDDPRINT("count=%ld", (long) count)); DUK_ASSERT(count >= 1); duk_memzero((void *) nc_ctx->digits, (size_t) count); nc_ctx->count = count; nc_ctx->k = 1; /* 0.000... */ neg = 0; goto zero_skip; } duk__dragon4_double_to_ctx(nc_ctx, x); /* -> sets 'f' and 'e' */ DUK__BI_PRINT("f", &nc_ctx->f); DUK_DDD(DUK_DDDPRINT("e=%ld", (long) nc_ctx->e)); /* * Dragon4 slow path digit generation. */ duk__dragon4_prepare(nc_ctx); /* setup many variables in nc_ctx */ DUK_DDD(DUK_DDDPRINT("after prepare:")); DUK__BI_PRINT("r", &nc_ctx->r); DUK__BI_PRINT("s", &nc_ctx->s); DUK__BI_PRINT("mp", &nc_ctx->mp); DUK__BI_PRINT("mm", &nc_ctx->mm); duk__dragon4_scale(nc_ctx); DUK_DDD(DUK_DDDPRINT("after scale; k=%ld", (long) nc_ctx->k)); DUK__BI_PRINT("r", &nc_ctx->r); DUK__BI_PRINT("s", &nc_ctx->s); DUK__BI_PRINT("mp", &nc_ctx->mp); DUK__BI_PRINT("mm", &nc_ctx->mm); duk__dragon4_generate(nc_ctx); /* * Convert and push final string. */ zero_skip: if (flags & DUK_N2S_FLAG_FIXED_FORMAT) { /* Perform fixed-format rounding. */ duk_small_int_t roundpos; if (flags & DUK_N2S_FLAG_FRACTION_DIGITS) { /* 'roundpos' is relative to nc_ctx->k and increases to the right * (opposite of how 'k' changes). */ roundpos = -digits; /* absolute position for digit considered for rounding */ roundpos = nc_ctx->k - roundpos; } else { roundpos = digits; } DUK_DDD(DUK_DDDPRINT("rounding: k=%ld, count=%ld, digits=%ld, roundpos=%ld", (long) nc_ctx->k, (long) nc_ctx->count, (long) digits, (long) roundpos)); (void) duk__dragon4_fixed_format_round(nc_ctx, roundpos); /* Note: 'count' is currently not adjusted by rounding (i.e. the * digits are not "chopped off". That shouldn't matter because * the digit position (absolute or relative) is passed on to the * convert-and-push function. */ } duk__dragon4_convert_and_push(nc_ctx, thr, radix, digits, flags, neg); } DUK_INTERNAL void duk_numconv_stringify(duk_hthread *thr, duk_small_int_t radix, duk_small_int_t digits, duk_small_uint_t flags) { duk_native_stack_check(thr); duk__numconv_stringify_raw(thr, radix, digits, flags); } /* * Exposed string-to-number API * * Input: [ string ] * Output: [ number ] * * If number parsing fails, a NaN is pushed as the result. If number parsing * fails due to an internal error, an InternalError is thrown. */ DUK_LOCAL DUK_NOINLINE void duk__numconv_parse_raw(duk_hthread *thr, duk_small_int_t radix, duk_small_uint_t flags) { duk__numconv_stringify_ctx nc_ctx_alloc; /* large context; around 2kB now */ duk__numconv_stringify_ctx *nc_ctx = &nc_ctx_alloc; duk_double_t res; duk_hstring *h_str; duk_int_t expt; duk_bool_t expt_neg; duk_small_int_t expt_adj; duk_small_int_t neg; duk_small_int_t dig; duk_small_int_t dig_whole; duk_small_int_t dig_lzero; duk_small_int_t dig_frac; duk_small_int_t dig_expt; duk_small_int_t dig_prec; const duk__exp_limits *explim; const duk_uint8_t *p; duk_small_int_t ch; DUK_DDD(DUK_DDDPRINT("parse number: %!T, radix=%ld, flags=0x%08lx", (duk_tval *) duk_get_tval(thr, -1), (long) radix, (unsigned long) flags)); DUK_ASSERT(radix >= 2 && radix <= 36); DUK_ASSERT(radix - 2 < (duk_small_int_t) sizeof(duk__str2num_digits_for_radix)); /* * Preliminaries: trim, sign, Infinity check * * We rely on the interned string having a NUL terminator, which will * cause a parse failure wherever it is encountered. As a result, we * don't need separate pointer checks. * * There is no special parsing for 'NaN' in the specification although * 'Infinity' (with an optional sign) is allowed in some contexts. * Some contexts allow plus/minus sign, while others only allow the * minus sign (like JSON.parse()). * * Automatic hex number detection (leading '0x' or '0X') and octal * number detection (leading '0' followed by at least one octal digit) * is done here too. * * Symbols are not explicitly rejected here (that's up to the caller). * If a symbol were passed here, it should ultimately safely fail * parsing due to a syntax error. */ if (flags & DUK_S2N_FLAG_TRIM_WHITE) { /* Leading / trailing whitespace is sometimes accepted and * sometimes not. After white space trimming, all valid input * characters are pure ASCII. */ duk_trim(thr, -1); } h_str = duk_require_hstring(thr, -1); DUK_ASSERT(h_str != NULL); p = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_str); neg = 0; ch = *p; if (ch == (duk_small_int_t) '+') { if ((flags & DUK_S2N_FLAG_ALLOW_PLUS) == 0) { DUK_DDD(DUK_DDDPRINT("parse failed: leading plus sign not allowed")); goto parse_fail; } p++; } else if (ch == (duk_small_int_t) '-') { if ((flags & DUK_S2N_FLAG_ALLOW_MINUS) == 0) { DUK_DDD(DUK_DDDPRINT("parse failed: leading minus sign not allowed")); goto parse_fail; } p++; neg = 1; } if ((flags & DUK_S2N_FLAG_ALLOW_INF) && DUK_STRNCMP((const char *) p, "Infinity", 8) == 0) { /* Don't check for Infinity unless the context allows it. * 'Infinity' is a valid integer literal in e.g. base-36: * * parseInt('Infinity', 36) * 1461559270678 */ if ((flags & DUK_S2N_FLAG_ALLOW_GARBAGE) == 0 && p[8] != DUK_ASC_NUL) { DUK_DDD(DUK_DDDPRINT("parse failed: trailing garbage after matching 'Infinity' not allowed")); goto parse_fail; } else { res = DUK_DOUBLE_INFINITY; goto negcheck_and_ret; } } ch = *p; if (ch == (duk_small_int_t) '0') { duk_small_int_t detect_radix = 0; ch = DUK_LOWERCASE_CHAR_ASCII(p[1]); /* 'x' or 'X' -> 'x' */ if ((flags & DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT) && ch == DUK_ASC_LC_X) { DUK_DDD(DUK_DDDPRINT("detected 0x/0X hex prefix, changing radix and preventing fractions and exponent")); detect_radix = 16; #if 0 } else if ((flags & DUK_S2N_FLAG_ALLOW_AUTO_LEGACY_OCT_INT) && (ch >= (duk_small_int_t) '0' && ch <= (duk_small_int_t) '9')) { DUK_DDD(DUK_DDDPRINT("detected 0n oct prefix, changing radix and preventing fractions and exponent")); detect_radix = 8; /* NOTE: if this legacy octal case is added back, it has * different flags and 'p' advance so this needs to be * reworked. */ flags |= DUK_S2N_FLAG_ALLOW_EMPTY_AS_ZERO; /* interpret e.g. '09' as '0', not NaN */ p += 1; #endif } else if ((flags & DUK_S2N_FLAG_ALLOW_AUTO_OCT_INT) && ch == DUK_ASC_LC_O) { DUK_DDD(DUK_DDDPRINT("detected 0o oct prefix, changing radix and preventing fractions and exponent")); detect_radix = 8; } else if ((flags & DUK_S2N_FLAG_ALLOW_AUTO_BIN_INT) && ch == DUK_ASC_LC_B) { DUK_DDD(DUK_DDDPRINT("detected 0b bin prefix, changing radix and preventing fractions and exponent")); detect_radix = 2; } if (detect_radix > 0) { radix = detect_radix; /* Clear empty as zero flag: interpret e.g. '0x' and '0xg' as a NaN (= parse error) */ flags &= ~(DUK_S2N_FLAG_ALLOW_EXP | DUK_S2N_FLAG_ALLOW_EMPTY_FRAC | DUK_S2N_FLAG_ALLOW_FRAC | DUK_S2N_FLAG_ALLOW_NAKED_FRAC | DUK_S2N_FLAG_ALLOW_EMPTY_AS_ZERO); flags |= DUK_S2N_FLAG_ALLOW_LEADING_ZERO; /* allow e.g. '0x0009' and '0b00010001' */ p += 2; } } /* * Scan number and setup for Dragon4. * * The fast path case is detected during setup: an integer which * can be converted without rounding, no net exponent. The fast * path could be implemented as a separate scan, but may not really * be worth it: the multiplications for building 'f' are not * expensive when 'f' is small. * * The significand ('f') must contain enough bits of (apparent) * accuracy, so that Dragon4 will generate enough binary output digits. * For decimal numbers, this means generating a 20-digit significand, * which should yield enough practical accuracy to parse IEEE doubles. * In fact, the ECMAScript specification explicitly allows an * implementation to treat digits beyond 20 as zeroes (and even * to round the 20th digit upwards). For non-decimal numbers, the * appropriate number of digits has been precomputed for comparable * accuracy. * * Digit counts: * * [ dig_lzero ] * | * .+-..---[ dig_prec ]----. * | || | * 0000123.456789012345678901234567890e+123456 * | | | | | | * `--+--' `------[ dig_frac ]-------' `-+--' * | | * [ dig_whole ] [ dig_expt ] * * dig_frac and dig_expt are -1 if not present * dig_lzero is only computed for whole number part * * Parsing state * * Parsing whole part dig_frac < 0 AND dig_expt < 0 * Parsing fraction part dig_frac >= 0 AND dig_expt < 0 * Parsing exponent part dig_expt >= 0 (dig_frac may be < 0 or >= 0) * * Note: in case we hit an implementation limit (like exponent range), * we should throw an error, NOT return NaN or Infinity. Even with * very large exponent (or significand) values the final result may be * finite, so NaN/Infinity would be incorrect. */ duk__bi_set_small(&nc_ctx->f, 0); dig_prec = 0; dig_lzero = 0; dig_whole = 0; dig_frac = -1; dig_expt = -1; expt = 0; expt_adj = 0; /* essentially tracks digit position of lowest 'f' digit */ expt_neg = 0; for (;;) { ch = *p++; DUK_DDD(DUK_DDDPRINT("parse digits: p=%p, ch='%c' (%ld), expt=%ld, expt_adj=%ld, " "dig_whole=%ld, dig_frac=%ld, dig_expt=%ld, dig_lzero=%ld, dig_prec=%ld", (const void *) p, (int) ((ch >= 0x20 && ch <= 0x7e) ? ch : '?'), (long) ch, (long) expt, (long) expt_adj, (long) dig_whole, (long) dig_frac, (long) dig_expt, (long) dig_lzero, (long) dig_prec)); DUK__BI_PRINT("f", &nc_ctx->f); /* Most common cases first. */ if (ch >= (duk_small_int_t) '0' && ch <= (duk_small_int_t) '9') { dig = (duk_small_int_t) ch - '0' + 0; } else if (ch == (duk_small_int_t) '.') { /* A leading digit is not required in some cases, e.g. accept ".123". * In other cases (JSON.parse()) a leading digit is required. This * is checked for after the loop. */ if (dig_frac >= 0 || dig_expt >= 0) { if (flags & DUK_S2N_FLAG_ALLOW_GARBAGE) { DUK_DDD(DUK_DDDPRINT("garbage termination (invalid period)")); break; } else { DUK_DDD(DUK_DDDPRINT("parse failed: period not allowed")); goto parse_fail; } } if ((flags & DUK_S2N_FLAG_ALLOW_FRAC) == 0) { /* Some contexts don't allow fractions at all; this can't be a * post-check because the state ('f' and expt) would be incorrect. */ if (flags & DUK_S2N_FLAG_ALLOW_GARBAGE) { DUK_DDD(DUK_DDDPRINT("garbage termination (invalid first period)")); break; } else { DUK_DDD(DUK_DDDPRINT("parse failed: fraction part not allowed")); } } DUK_DDD(DUK_DDDPRINT("start fraction part")); dig_frac = 0; continue; } else if (ch == (duk_small_int_t) 0) { DUK_DDD(DUK_DDDPRINT("NUL termination")); break; } else if ((flags & DUK_S2N_FLAG_ALLOW_EXP) && dig_expt < 0 && (ch == (duk_small_int_t) 'e' || ch == (duk_small_int_t) 'E')) { /* Note: we don't parse back exponent notation for anything else * than radix 10, so this is not an ambiguous check (e.g. hex * exponent values may have 'e' either as a significand digit * or as an exponent separator). * * If the exponent separator occurs twice, 'e' will be interpreted * as a digit (= 14) and will be rejected as an invalid decimal * digit. */ DUK_DDD(DUK_DDDPRINT("start exponent part")); /* Exponent without a sign or with a +/- sign is accepted * by all call sites (even JSON.parse()). */ ch = *p; if (ch == (duk_small_int_t) '-') { expt_neg = 1; p++; } else if (ch == (duk_small_int_t) '+') { p++; } dig_expt = 0; continue; } else if (ch >= (duk_small_int_t) 'a' && ch <= (duk_small_int_t) 'z') { dig = (duk_small_int_t) (ch - (duk_small_int_t) 'a' + 0x0a); } else if (ch >= (duk_small_int_t) 'A' && ch <= (duk_small_int_t) 'Z') { dig = (duk_small_int_t) (ch - (duk_small_int_t) 'A' + 0x0a); } else { dig = 255; /* triggers garbage digit check below */ } DUK_ASSERT((dig >= 0 && dig <= 35) || dig == 255); if (dig >= radix) { if (flags & DUK_S2N_FLAG_ALLOW_GARBAGE) { DUK_DDD(DUK_DDDPRINT("garbage termination")); break; } else { DUK_DDD(DUK_DDDPRINT("parse failed: trailing garbage or invalid digit")); goto parse_fail; } } if (dig_expt < 0) { /* whole or fraction digit */ if (dig_prec < duk__str2num_digits_for_radix[radix - 2]) { /* significant from precision perspective */ duk_small_int_t f_zero = duk__bi_is_zero(&nc_ctx->f); if (f_zero && dig == 0) { /* Leading zero is not counted towards precision digits; not * in the integer part, nor in the fraction part. */ if (dig_frac < 0) { dig_lzero++; } } else { /* XXX: join these ops (multiply-accumulate), but only if * code footprint decreases. */ duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->f, (duk_uint32_t) radix); duk__bi_add_small(&nc_ctx->f, &nc_ctx->t1, (duk_uint32_t) dig); dig_prec++; } } else { /* Ignore digits beyond a radix-specific limit, but note them * in expt_adj. */ expt_adj++; } if (dig_frac >= 0) { dig_frac++; expt_adj--; } else { dig_whole++; } } else { /* exponent digit */ DUK_ASSERT(radix == 10); expt = expt * radix + dig; if (expt > DUK_S2N_MAX_EXPONENT) { /* Impose a reasonable exponent limit, so that exp * doesn't need to get tracked using a bigint. */ DUK_DDD(DUK_DDDPRINT("parse failed: exponent too large")); goto parse_explimit_error; } dig_expt++; } } /* Leading zero. */ if (dig_lzero > 0 && dig_whole > 1) { if ((flags & DUK_S2N_FLAG_ALLOW_LEADING_ZERO) == 0) { DUK_DDD(DUK_DDDPRINT("parse failed: leading zeroes not allowed in integer part")); goto parse_fail; } } /* Validity checks for various fraction formats ("0.1", ".1", "1.", "."). */ if (dig_whole == 0) { if (dig_frac == 0) { /* "." is not accepted in any format */ DUK_DDD(DUK_DDDPRINT("parse failed: plain period without leading or trailing digits")); goto parse_fail; } else if (dig_frac > 0) { /* ".123" */ if ((flags & DUK_S2N_FLAG_ALLOW_NAKED_FRAC) == 0) { DUK_DDD(DUK_DDDPRINT("parse failed: fraction part not allowed without " "leading integer digit(s)")); goto parse_fail; } } else { /* Empty ("") is allowed in some formats (e.g. Number(''), as zero, * but it must not have a leading +/- sign (GH-2019). Note that * for Number(), h_str is already trimmed so we can check for zero * length and still get Number(' + ') == NaN. */ if ((flags & DUK_S2N_FLAG_ALLOW_EMPTY_AS_ZERO) == 0) { DUK_DDD(DUK_DDDPRINT("parse failed: empty string not allowed (as zero)")); goto parse_fail; } else if (DUK_HSTRING_GET_BYTELEN(h_str) != 0) { DUK_DDD(DUK_DDDPRINT("parse failed: no digits, but not empty (had a +/- sign)")); goto parse_fail; } } } else { if (dig_frac == 0) { /* "123." is allowed in some formats */ if ((flags & DUK_S2N_FLAG_ALLOW_EMPTY_FRAC) == 0) { DUK_DDD(DUK_DDDPRINT("parse failed: empty fractions")); goto parse_fail; } } else if (dig_frac > 0) { /* "123.456" */ ; } else { /* "123" */ ; } } /* Exponent without digits (e.g. "1e" or "1e+"). If trailing garbage is * allowed, ignore exponent part as garbage (= parse as "1", i.e. exp 0). */ if (dig_expt == 0) { if ((flags & DUK_S2N_FLAG_ALLOW_GARBAGE) == 0) { DUK_DDD(DUK_DDDPRINT("parse failed: empty exponent")); goto parse_fail; } DUK_ASSERT(expt == 0); } if (expt_neg) { expt = -expt; } DUK_DDD(DUK_DDDPRINT("expt=%ld, expt_adj=%ld, net exponent -> %ld", (long) expt, (long) expt_adj, (long) (expt + expt_adj))); expt += expt_adj; /* Fast path check. */ if (nc_ctx->f.n <= 1 && /* 32-bit value */ expt == 0 /* no net exponent */) { /* Fast path is triggered for no exponent and also for balanced exponent * and fraction parts, e.g. for "1.23e2" == "123". Remember to respect * zero sign. */ /* XXX: could accept numbers larger than 32 bits, e.g. up to 53 bits? */ DUK_DDD(DUK_DDDPRINT("fast path number parse")); if (nc_ctx->f.n == 1) { res = (double) nc_ctx->f.v[0]; } else { res = 0.0; } goto negcheck_and_ret; } /* Significand ('f') padding. */ while (dig_prec < duk__str2num_digits_for_radix[radix - 2]) { /* Pad significand with "virtual" zero digits so that Dragon4 will * have enough (apparent) precision to work with. */ DUK_DDD(DUK_DDDPRINT("dig_prec=%ld, pad significand with zero", (long) dig_prec)); duk__bi_mul_small_copy(&nc_ctx->f, (duk_uint32_t) radix, &nc_ctx->t1); DUK__BI_PRINT("f", &nc_ctx->f); expt--; dig_prec++; } DUK_DDD(DUK_DDDPRINT("final exponent: %ld", (long) expt)); /* Detect zero special case. */ if (nc_ctx->f.n == 0) { /* This may happen even after the fast path check, if exponent is * not balanced (e.g. "0e1"). Remember to respect zero sign. */ DUK_DDD(DUK_DDDPRINT("significand is zero")); res = 0.0; goto negcheck_and_ret; } /* Quick reject of too large or too small exponents. This check * would be incorrect for zero (e.g. "0e1000" is zero, not Infinity) * so zero check must be above. */ explim = &duk__str2num_exp_limits[radix - 2]; if (expt > explim->upper) { DUK_DDD(DUK_DDDPRINT("exponent too large -> infinite")); res = (duk_double_t) DUK_DOUBLE_INFINITY; goto negcheck_and_ret; } else if (expt < explim->lower) { DUK_DDD(DUK_DDDPRINT("exponent too small -> zero")); res = (duk_double_t) 0.0; goto negcheck_and_ret; } nc_ctx->is_s2n = 1; nc_ctx->e = expt; nc_ctx->b = radix; nc_ctx->B = 2; nc_ctx->is_fixed = 1; nc_ctx->abs_pos = 0; nc_ctx->req_digits = 53 + 1; DUK__BI_PRINT("f", &nc_ctx->f); DUK_DDD(DUK_DDDPRINT("e=%ld", (long) nc_ctx->e)); /* * Dragon4 slow path (binary) digit generation. * An extra digit is generated for rounding. */ duk__dragon4_prepare(nc_ctx); /* setup many variables in nc_ctx */ DUK_DDD(DUK_DDDPRINT("after prepare:")); DUK__BI_PRINT("r", &nc_ctx->r); DUK__BI_PRINT("s", &nc_ctx->s); DUK__BI_PRINT("mp", &nc_ctx->mp); DUK__BI_PRINT("mm", &nc_ctx->mm); duk__dragon4_scale(nc_ctx); DUK_DDD(DUK_DDDPRINT("after scale; k=%ld", (long) nc_ctx->k)); DUK__BI_PRINT("r", &nc_ctx->r); DUK__BI_PRINT("s", &nc_ctx->s); DUK__BI_PRINT("mp", &nc_ctx->mp); DUK__BI_PRINT("mm", &nc_ctx->mm); duk__dragon4_generate(nc_ctx); DUK_ASSERT(nc_ctx->count == 53 + 1); /* * Convert binary digits into an IEEE double. Need to handle * denormals and rounding correctly. * * Some call sites currently assume the result is always a * non-fastint double. If this is changed, check all call * sites. */ duk__dragon4_ctx_to_double(nc_ctx, &res); goto negcheck_and_ret; negcheck_and_ret: if (neg) { res = -res; } duk_pop(thr); duk_push_number(thr, (double) res); DUK_DDD(DUK_DDDPRINT("result: %!T", (duk_tval *) duk_get_tval(thr, -1))); return; parse_fail: DUK_DDD(DUK_DDDPRINT("parse failed")); duk_pop(thr); duk_push_nan(thr); return; parse_explimit_error: DUK_DDD(DUK_DDDPRINT("parse failed, internal error, can't return a value")); DUK_ERROR_RANGE(thr, "exponent too large"); DUK_WO_NORETURN(return;); } DUK_INTERNAL void duk_numconv_parse(duk_hthread *thr, duk_small_int_t radix, duk_small_uint_t flags) { duk_native_stack_check(thr); duk__numconv_parse_raw(thr, radix, flags); } /* automatic undefs */ #undef DUK__BI_MAX_PARTS #undef DUK__BI_PRINT #undef DUK__DIGITCHAR #undef DUK__DRAGON4_OUTPUT_PREINC #undef DUK__IEEE_DOUBLE_EXP_BIAS #undef DUK__IEEE_DOUBLE_EXP_MIN #undef DUK__MAX_FORMATTED_LENGTH #undef DUK__MAX_OUTPUT_DIGITS #undef DUK__NO_EXP #undef DUK__NUMCONV_CTX_BIGINTS_SIZE #undef DUK__NUMCONV_CTX_NUM_BIGINTS /* * Regexp compilation. * * See doc/regexp.rst for a discussion of the compilation approach and * current limitations. * * Regexp bytecode assumes jumps can be expressed with signed 32-bit * integers. Consequently the bytecode size must not exceed 0x7fffffffL. * The implementation casts duk_size_t (buffer size) to duk_(u)int32_t * in many places. Although this could be changed, the bytecode format * limit would still prevent regexps exceeding the signed 32-bit limit * from working. * * XXX: The implementation does not prevent bytecode from exceeding the * maximum supported size. This could be done by limiting the maximum * input string size (assuming an upper bound can be computed for number * of bytecode bytes emitted per input byte) or checking buffer maximum * size when emitting bytecode (slower). */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_REGEXP_SUPPORT) /* * Helper macros */ #define DUK__RE_INITIAL_BUFSIZE 64 #define DUK__RE_BUFLEN(re_ctx) \ DUK_BW_GET_SIZE(re_ctx->thr, &re_ctx->bw) /* * Disjunction struct: result of parsing a disjunction */ typedef struct { /* Number of characters that the atom matches (e.g. 3 for 'abc'), * -1 if atom is complex and number of matched characters either * varies or is not known. */ duk_int32_t charlen; #if 0 /* These are not needed to implement quantifier capture handling, * but might be needed at some point. */ /* re_ctx->captures at start and end of atom parsing. * Since 'captures' indicates highest capture number emitted * so far in a DUK_REOP_SAVE, the captures numbers saved by * the atom are: ]start_captures,end_captures]. */ duk_uint32_t start_captures; duk_uint32_t end_captures; #endif } duk__re_disjunction_info; /* * Encoding helpers * * Some of the typing is bytecode based, e.g. slice sizes are unsigned 32-bit * even though the buffer operations will use duk_size_t. */ /* XXX: the insert helpers should ensure that the bytecode result is not * larger than expected (or at least assert for it). Many things in the * bytecode, like skip offsets, won't work correctly if the bytecode is * larger than say 2G. */ DUK_LOCAL duk_uint32_t duk__encode_i32(duk_int32_t x) { if (x < 0) { return ((duk_uint32_t) (-x)) * 2 + 1; } else { return ((duk_uint32_t) x) * 2; } } /* XXX: return type should probably be duk_size_t, or explicit checks are needed for * maximum size. */ DUK_LOCAL duk_uint32_t duk__insert_u32(duk_re_compiler_ctx *re_ctx, duk_uint32_t offset, duk_uint32_t x) { duk_uint8_t buf[DUK_UNICODE_MAX_XUTF8_LENGTH]; duk_small_int_t len; len = duk_unicode_encode_xutf8((duk_ucodepoint_t) x, buf); DUK_ASSERT(len >= 0); DUK_BW_INSERT_ENSURE_BYTES(re_ctx->thr, &re_ctx->bw, offset, buf, (duk_size_t) len); return (duk_uint32_t) len; } DUK_LOCAL void duk__append_u32(duk_re_compiler_ctx *re_ctx, duk_uint32_t x) { DUK_BW_WRITE_ENSURE_XUTF8(re_ctx->thr, &re_ctx->bw, x); } DUK_LOCAL void duk__append_7bit(duk_re_compiler_ctx *re_ctx, duk_uint32_t x) { #if defined(DUK_USE_PREFER_SIZE) duk__append_u32(re_ctx, x); #else DUK_ASSERT(x <= 0x7fU); DUK_BW_WRITE_ENSURE_U8(re_ctx->thr, &re_ctx->bw, (duk_uint8_t) x); #endif } #if 0 DUK_LOCAL void duk__append_2bytes(duk_re_compiler_ctx *re_ctx, duk_uint8_t x, duk_uint8_t y) { DUK_BW_WRITE_ENSURE_U8_2(re_ctx->thr, &re_ctx->bw, x, y); } #endif DUK_LOCAL duk_uint32_t duk__insert_i32(duk_re_compiler_ctx *re_ctx, duk_uint32_t offset, duk_int32_t x) { return duk__insert_u32(re_ctx, offset, duk__encode_i32(x)); } DUK_LOCAL void duk__append_reop(duk_re_compiler_ctx *re_ctx, duk_uint32_t reop) { DUK_ASSERT(reop <= 0x7fU); (void) duk__append_7bit(re_ctx, reop); } #if 0 /* unused */ DUK_LOCAL void duk__append_i32(duk_re_compiler_ctx *re_ctx, duk_int32_t x) { duk__append_u32(re_ctx, duk__encode_i32(x)); } #endif /* special helper for emitting u16 lists (used for character ranges for built-in char classes) */ DUK_LOCAL void duk__append_u16_list(duk_re_compiler_ctx *re_ctx, const duk_uint16_t *values, duk_uint32_t count) { /* Call sites don't need the result length so it's not accumulated. */ while (count-- > 0) { duk__append_u32(re_ctx, (duk_uint32_t) (*values++)); } } DUK_LOCAL void duk__insert_slice(duk_re_compiler_ctx *re_ctx, duk_uint32_t offset, duk_uint32_t data_offset, duk_uint32_t data_length) { DUK_BW_INSERT_ENSURE_SLICE(re_ctx->thr, &re_ctx->bw, offset, data_offset, data_length); } DUK_LOCAL void duk__append_slice(duk_re_compiler_ctx *re_ctx, duk_uint32_t data_offset, duk_uint32_t data_length) { DUK_BW_WRITE_ENSURE_SLICE(re_ctx->thr, &re_ctx->bw, data_offset, data_length); } DUK_LOCAL void duk__remove_slice(duk_re_compiler_ctx *re_ctx, duk_uint32_t data_offset, duk_uint32_t data_length) { DUK_BW_REMOVE_ENSURE_SLICE(re_ctx->thr, &re_ctx->bw, data_offset, data_length); } /* * Insert a jump offset at 'offset' to complete an instruction * (the jump offset is always the last component of an instruction). * The 'skip' argument must be computed relative to 'offset', * -without- taking into account the skip field being inserted. * * ... A B C ins X Y Z ... (ins may be a JUMP, SPLIT1/SPLIT2, etc) * => ... A B C ins SKIP X Y Z * * Computing the final (adjusted) skip value, which is relative to the * first byte of the next instruction, is a bit tricky because of the * variable length UTF-8 encoding. See doc/regexp.rst for discussion. */ DUK_LOCAL duk_uint32_t duk__insert_jump_offset(duk_re_compiler_ctx *re_ctx, duk_uint32_t offset, duk_int32_t skip) { #if 0 /* Iterative solution. */ if (skip < 0) { duk_small_int_t len; /* two encoding attempts suffices */ len = duk_unicode_get_xutf8_length((duk_codepoint_t) duk__encode_i32(skip)); len = duk_unicode_get_xutf8_length((duk_codepoint_t) duk__encode_i32(skip - (duk_int32_t) len)); DUK_ASSERT(duk_unicode_get_xutf8_length(duk__encode_i32(skip - (duk_int32_t) len)) == len); /* no change */ skip -= (duk_int32_t) len; } #endif #if defined(DUK_USE_PREFER_SIZE) /* Closed form solution, this produces smallest code. * See re_neg_jump_offset (closed2). */ if (skip < 0) { skip--; if (skip < -0x3fL) { skip--; } if (skip < -0x3ffL) { skip--; } if (skip < -0x7fffL) { skip--; } if (skip < -0xfffffL) { skip--; } if (skip < -0x1ffffffL) { skip--; } if (skip < -0x3fffffffL) { skip--; } } #else /* DUK_USE_PREFER_SIZE */ /* Closed form solution, this produces fastest code. * See re_neg_jump_offset (closed1). */ if (skip < 0) { if (skip >= -0x3eL) { skip -= 1; } else if (skip >= -0x3fdL) { skip -= 2; } else if (skip >= -0x7ffcL) { skip -= 3; } else if (skip >= -0xffffbL) { skip -= 4; } else if (skip >= -0x1fffffaL) { skip -= 5; } else if (skip >= -0x3ffffff9L) { skip -= 6; } else { skip -= 7; } } #endif /* DUK_USE_PREFER_SIZE */ return duk__insert_i32(re_ctx, offset, skip); } DUK_LOCAL duk_uint32_t duk__append_jump_offset(duk_re_compiler_ctx *re_ctx, duk_int32_t skip) { return (duk_uint32_t) duk__insert_jump_offset(re_ctx, (duk_uint32_t) DUK__RE_BUFLEN(re_ctx), skip); } /* * duk_re_range_callback for generating character class ranges. * * When ignoreCase is false, the range is simply emitted as is. We don't, * for instance, eliminate duplicates or overlapping ranges in a character * class. * * When ignoreCase is true but the 'direct' flag is set, the caller knows * that the range canonicalizes to itself for case insensitive matching, * so the range is emitted as is. This is mainly useful for built-in ranges * like \W. * * Otherwise, when ignoreCase is true, the range needs to be normalized * through canonicalization. Unfortunately a canonicalized version of a * continuous range is not necessarily continuous (e.g. [x-{] is continuous * but [X-{] is not). As a result, a single input range may expand to a lot * of output ranges. The current algorithm creates the canonicalized ranges * footprint efficiently at the cost of compile time execution time; see * doc/regexp.rst for discussion, and some more details below. * * Note that the ctx->nranges is a context-wide temporary value. This is OK * because there cannot be multiple character classes being parsed * simultaneously. * * More detail on canonicalization: * * Conceptually, a range is canonicalized by scanning the entire range, * normalizing each codepoint by converting it to uppercase, and generating * a set of result ranges. * * Ideally a minimal set of output ranges would be emitted by merging all * possible ranges even if they're emitted out of sequence. Because the * input string is also case normalized during matching, some codepoints * never occur at runtime; these "don't care" codepoints can be included or * excluded from ranges when merging/optimizing ranges. * * The current algorithm does not do optimal range merging. Rather, output * codepoints are generated in sequence, and when the output codepoints are * continuous (CP, CP+1, CP+2, ...), they are merged locally into as large a * range as possible. A small canonicalization bitmap is used to reduce * actual codepoint canonicalizations which are quite slow at present. The * bitmap provides a "codepoint block is continuous with respect to * canonicalization" for N-codepoint blocks. This allows blocks to be * skipped quickly. * * There are a number of shortcomings and future work here: * * - Individual codepoint normalizations are slow because they involve * walking bit-packed rules without a lookup index. * * - The conceptual algorithm needs to canonicalize every codepoint in the * input range to figure out the output range(s). Even with the small * canonicalization bitmap the algorithm runs quite slowly for worst case * inputs. There are many data structure alternatives to improve this. * * - While the current algorithm generates maximal output ranges when the * output codepoints are emitted linearly, output ranges are not sorted or * merged otherwise. In the worst case a lot of ranges are emitted when * most of the ranges could be merged. In this process one could take * advantage of "don't care" codepoints, which are never matched against at * runtime due to canonicalization of input codepoints before comparison, * to merge otherwise discontinuous output ranges. * * - The runtime data structure is just a linear list of ranges to match * against. This can be quite slow if there are a lot of output ranges. * There are various ways to make matching against the ranges faster, * e.g. sorting the ranges and using a binary search; skip lists; tree * based representations; full or approximate codepoint bitmaps, etc. * * - Only BMP is supported, codepoints above BMP are assumed to canonicalize * to themselves. For now this is one place where we don't want to * support chars outside the BMP, because the exhaustive search would be * massively larger. It would be possible to support non-BMP with a * different algorithm, or perhaps doing case normalization only at match * time. */ DUK_LOCAL void duk__regexp_emit_range(duk_re_compiler_ctx *re_ctx, duk_codepoint_t r1, duk_codepoint_t r2) { DUK_ASSERT(r2 >= r1); duk__append_u32(re_ctx, (duk_uint32_t) r1); duk__append_u32(re_ctx, (duk_uint32_t) r2); re_ctx->nranges++; } #if defined(DUK_USE_REGEXP_CANON_BITMAP) /* Find next canonicalization discontinuity (conservative estimate) starting * from 'start', not exceeding 'end'. If continuity is fine up to 'end' * inclusive, returns end. Minimum possible return value is start. */ DUK_LOCAL duk_codepoint_t duk__re_canon_next_discontinuity(duk_codepoint_t start, duk_codepoint_t end) { duk_uint_t start_blk; duk_uint_t end_blk; duk_uint_t blk; duk_uint_t offset; duk_uint8_t mask; /* Inclusive block range. */ DUK_ASSERT(start >= 0); DUK_ASSERT(end >= 0); DUK_ASSERT(end >= start); start_blk = (duk_uint_t) (start >> DUK_CANON_BITMAP_BLKSHIFT); end_blk = (duk_uint_t) (end >> DUK_CANON_BITMAP_BLKSHIFT); for (blk = start_blk; blk <= end_blk; blk++) { offset = blk >> 3; mask = 1U << (blk & 0x07); if (offset >= sizeof(duk_unicode_re_canon_bitmap)) { /* Reached non-BMP range which is assumed continuous. */ return end; } DUK_ASSERT(offset < sizeof(duk_unicode_re_canon_bitmap)); if ((duk_unicode_re_canon_bitmap[offset] & mask) == 0) { /* Block is discontinuous, continuity is guaranteed * only up to end of previous block (+1 for exclusive * return value => start of current block). Start * block requires special handling. */ if (blk > start_blk) { return (duk_codepoint_t) (blk << DUK_CANON_BITMAP_BLKSHIFT); } else { return start; } } } DUK_ASSERT(blk == end_blk + 1); /* Reached end block which is continuous. */ return end; } #else /* DUK_USE_REGEXP_CANON_BITMAP */ DUK_LOCAL duk_codepoint_t duk__re_canon_next_discontinuity(duk_codepoint_t start, duk_codepoint_t end) { DUK_ASSERT(start >= 0); DUK_ASSERT(end >= 0); DUK_ASSERT(end >= start); if (start >= 0x10000) { /* Even without the bitmap, treat non-BMP as continuous. */ return end; } return start; } #endif /* DUK_USE_REGEXP_CANON_BITMAP */ DUK_LOCAL void duk__regexp_generate_ranges(void *userdata, duk_codepoint_t r1, duk_codepoint_t r2, duk_bool_t direct) { duk_re_compiler_ctx *re_ctx = (duk_re_compiler_ctx *) userdata; duk_codepoint_t r_start; duk_codepoint_t r_end; duk_codepoint_t i; duk_codepoint_t t; duk_codepoint_t r_disc; DUK_DD(DUK_DDPRINT("duk__regexp_generate_ranges(): re_ctx=%p, range=[%ld,%ld] direct=%ld", (void *) re_ctx, (long) r1, (long) r2, (long) direct)); DUK_ASSERT(r2 >= r1); /* SyntaxError for out of order range. */ if (direct || (re_ctx->re_flags & DUK_RE_FLAG_IGNORE_CASE) == 0) { DUK_DD(DUK_DDPRINT("direct or not case sensitive, emit range: [%ld,%ld]", (long) r1, (long) r2)); duk__regexp_emit_range(re_ctx, r1, r2); return; } DUK_DD(DUK_DDPRINT("case sensitive, process range: [%ld,%ld]", (long) r1, (long) r2)); r_start = duk_unicode_re_canonicalize_char(re_ctx->thr, r1); r_end = r_start; for (i = r1 + 1; i <= r2;) { /* Input codepoint space processed up to i-1, and * current range in r_{start,end} is up-to-date * (inclusive) and may either break or continue. */ r_disc = duk__re_canon_next_discontinuity(i, r2); DUK_ASSERT(r_disc >= i); DUK_ASSERT(r_disc <= r2); r_end += r_disc - i; /* May be zero. */ t = duk_unicode_re_canonicalize_char(re_ctx->thr, r_disc); if (t == r_end + 1) { /* Not actually a discontinuity, continue range * to r_disc and recheck. */ r_end = t; } else { duk__regexp_emit_range(re_ctx, r_start, r_end); r_start = t; r_end = t; } i = r_disc + 1; /* Guarantees progress. */ } duk__regexp_emit_range(re_ctx, r_start, r_end); #if 0 /* Exhaustive search, very slow. */ r_start = duk_unicode_re_canonicalize_char(re_ctx->thr, r1); r_end = r_start; for (i = r1 + 1; i <= r2; i++) { t = duk_unicode_re_canonicalize_char(re_ctx->thr, i); if (t == r_end + 1) { r_end = t; } else { DUK_DD(DUK_DDPRINT("canonicalized, emit range: [%ld,%ld]", (long) r_start, (long) r_end)); duk__append_u32(re_ctx, (duk_uint32_t) r_start); duk__append_u32(re_ctx, (duk_uint32_t) r_end); re_ctx->nranges++; r_start = t; r_end = t; } } DUK_DD(DUK_DDPRINT("canonicalized, emit range: [%ld,%ld]", (long) r_start, (long) r_end)); duk__append_u32(re_ctx, (duk_uint32_t) r_start); duk__append_u32(re_ctx, (duk_uint32_t) r_end); re_ctx->nranges++; #endif } /* * Parse regexp Disjunction. Most of regexp compilation happens here. * * Handles Disjunction, Alternative, and Term productions directly without * recursion. The only constructs requiring recursion are positive/negative * lookaheads, capturing parentheses, and non-capturing parentheses. * * The function determines whether the entire disjunction is a 'simple atom' * (see doc/regexp.rst discussion on 'simple quantifiers') and if so, * returns the atom character length which is needed by the caller to keep * track of its own atom character length. A disjunction with more than one * alternative is never considered a simple atom (although in some cases * that might be the case). * * Return value: simple atom character length or < 0 if not a simple atom. * Appends the bytecode for the disjunction matcher to the end of the temp * buffer. * * Regexp top level structure is: * * Disjunction = Term* * | Term* | Disjunction * * Term = Assertion * | Atom * | Atom Quantifier * * An empty Term sequence is a valid disjunction alternative (e.g. /|||c||/). * * Notes: * * * Tracking of the 'simple-ness' of the current atom vs. the entire * disjunction are separate matters. For instance, the disjunction * may be complex, but individual atoms may be simple. Furthermore, * simple quantifiers are used whenever possible, even if the * disjunction as a whole is complex. * * * The estimate of whether an atom is simple is conservative now, * and it would be possible to expand it. For instance, captures * cause the disjunction to be marked complex, even though captures * -can- be handled by simple quantifiers with some minor modifications. * * * Disjunction 'tainting' as 'complex' is handled at the end of the * main for loop collectively for atoms. Assertions, quantifiers, * and '|' tokens need to taint the result manually if necessary. * Assertions cannot add to result char length, only atoms (and * quantifiers) can; currently quantifiers will taint the result * as complex though. */ DUK_LOCAL const duk_uint16_t * const duk__re_range_lookup1[3] = { duk_unicode_re_ranges_digit, duk_unicode_re_ranges_white, duk_unicode_re_ranges_wordchar }; DUK_LOCAL const duk_uint8_t duk__re_range_lookup2[3] = { sizeof(duk_unicode_re_ranges_digit) / (2 * sizeof(duk_uint16_t)), sizeof(duk_unicode_re_ranges_white) / (2 * sizeof(duk_uint16_t)), sizeof(duk_unicode_re_ranges_wordchar) / (2 * sizeof(duk_uint16_t)) }; DUK_LOCAL void duk__append_range_atom_matcher(duk_re_compiler_ctx *re_ctx, duk_small_uint_t re_op, const duk_uint16_t *ranges, duk_small_uint_t count) { #if 0 DUK_ASSERT(re_op <= 0x7fUL); DUK_ASSERT(count <= 0x7fUL); duk__append_2bytes(re_ctx, (duk_uint8_t) re_op, (duk_uint8_t) count); #endif duk__append_reop(re_ctx, re_op); duk__append_7bit(re_ctx, count); duk__append_u16_list(re_ctx, ranges, count * 2); } DUK_LOCAL void duk__parse_disjunction(duk_re_compiler_ctx *re_ctx, duk_bool_t expect_eof, duk__re_disjunction_info *out_atom_info) { duk_int32_t atom_start_offset = -1; /* negative -> no atom matched on previous round */ duk_int32_t atom_char_length = 0; /* negative -> complex atom */ duk_uint32_t atom_start_captures = re_ctx->captures; /* value of re_ctx->captures at start of atom */ duk_int32_t unpatched_disjunction_split = -1; duk_int32_t unpatched_disjunction_jump = -1; duk_uint32_t entry_offset = (duk_uint32_t) DUK__RE_BUFLEN(re_ctx); duk_int32_t res_charlen = 0; /* -1 if disjunction is complex, char length if simple */ duk__re_disjunction_info tmp_disj; DUK_ASSERT(out_atom_info != NULL); duk_native_stack_check(re_ctx->thr); if (re_ctx->recursion_depth >= re_ctx->recursion_limit) { DUK_ERROR_RANGE(re_ctx->thr, DUK_STR_REGEXP_COMPILER_RECURSION_LIMIT); DUK_WO_NORETURN(return;); } re_ctx->recursion_depth++; #if 0 out_atom_info->start_captures = re_ctx->captures; #endif for (;;) { /* atom_char_length, atom_start_offset, atom_start_offset reflect the * atom matched on the previous loop. If a quantifier is encountered * on this loop, these are needed to handle the quantifier correctly. * new_atom_char_length etc are for the atom parsed on this round; * they're written to atom_char_length etc at the end of the round. */ duk_int32_t new_atom_char_length; /* char length of the atom parsed in this loop */ duk_int32_t new_atom_start_offset; /* bytecode start offset of the atom parsed in this loop * (allows quantifiers to copy the atom bytecode) */ duk_uint32_t new_atom_start_captures; /* re_ctx->captures at the start of the atom parsed in this loop */ duk_lexer_parse_re_token(&re_ctx->lex, &re_ctx->curr_token); DUK_DD(DUK_DDPRINT("re token: %ld (num=%ld, char=%c)", (long) re_ctx->curr_token.t, (long) re_ctx->curr_token.num, (re_ctx->curr_token.num >= 0x20 && re_ctx->curr_token.num <= 0x7e) ? (int) re_ctx->curr_token.num : (int) '?')); /* set by atom case clauses */ new_atom_start_offset = -1; new_atom_char_length = -1; new_atom_start_captures = re_ctx->captures; switch (re_ctx->curr_token.t) { case DUK_RETOK_DISJUNCTION: { /* * The handling here is a bit tricky. If a previous '|' has been processed, * we have a pending split1 and a pending jump (for a previous match). These * need to be back-patched carefully. See docs for a detailed example. */ /* patch pending jump and split */ if (unpatched_disjunction_jump >= 0) { duk_uint32_t offset; DUK_ASSERT(unpatched_disjunction_split >= 0); offset = (duk_uint32_t) unpatched_disjunction_jump; offset += duk__insert_jump_offset(re_ctx, offset, (duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - offset)); /* offset is now target of the pending split (right after jump) */ duk__insert_jump_offset(re_ctx, (duk_uint32_t) unpatched_disjunction_split, (duk_int32_t) offset - unpatched_disjunction_split); } /* add a new pending split to the beginning of the entire disjunction */ (void) duk__insert_u32(re_ctx, entry_offset, DUK_REOP_SPLIT1); /* prefer direct execution */ unpatched_disjunction_split = (duk_int32_t) (entry_offset + 1); /* +1 for opcode */ /* add a new pending match jump for latest finished alternative */ duk__append_reop(re_ctx, DUK_REOP_JUMP); unpatched_disjunction_jump = (duk_int32_t) DUK__RE_BUFLEN(re_ctx); /* 'taint' result as complex */ res_charlen = -1; break; } case DUK_RETOK_QUANTIFIER: { if (atom_start_offset < 0) { DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_INVALID_QUANTIFIER_NO_ATOM); DUK_WO_NORETURN(return;); } if (re_ctx->curr_token.qmin > re_ctx->curr_token.qmax) { DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_INVALID_QUANTIFIER_VALUES); DUK_WO_NORETURN(return;); } if (atom_char_length >= 0) { /* * Simple atom * * If atom_char_length is zero, we'll have unbounded execution time for e.g. * /()*x/.exec('x'). We can't just skip the match because it might have some * side effects (for instance, if we allowed captures in simple atoms, the * capture needs to happen). The simple solution below is to force the * quantifier to match at most once, since the additional matches have no effect. * * With a simple atom there can be no capture groups, so no captures need * to be reset. */ duk_int32_t atom_code_length; duk_uint32_t offset; duk_uint32_t qmin, qmax; qmin = re_ctx->curr_token.qmin; qmax = re_ctx->curr_token.qmax; if (atom_char_length == 0) { /* qmin and qmax will be 0 or 1 */ if (qmin > 1) { qmin = 1; } if (qmax > 1) { qmax = 1; } } duk__append_reop(re_ctx, DUK_REOP_MATCH); /* complete 'sub atom' */ atom_code_length = (duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - (duk_size_t) atom_start_offset); offset = (duk_uint32_t) atom_start_offset; if (re_ctx->curr_token.greedy) { offset += duk__insert_u32(re_ctx, offset, DUK_REOP_SQGREEDY); offset += duk__insert_u32(re_ctx, offset, qmin); offset += duk__insert_u32(re_ctx, offset, qmax); offset += duk__insert_u32(re_ctx, offset, (duk_uint32_t) atom_char_length); offset += duk__insert_jump_offset(re_ctx, offset, atom_code_length); } else { offset += duk__insert_u32(re_ctx, offset, DUK_REOP_SQMINIMAL); offset += duk__insert_u32(re_ctx, offset, qmin); offset += duk__insert_u32(re_ctx, offset, qmax); offset += duk__insert_jump_offset(re_ctx, offset, atom_code_length); } DUK_UNREF(offset); /* silence scan-build warning */ } else { /* * Complex atom * * The original code is used as a template, and removed at the end * (this differs from the handling of simple quantifiers). * * NOTE: there is no current solution for empty atoms in complex * quantifiers. This would need some sort of a 'progress' instruction. * * XXX: impose limit on maximum result size, i.e. atom_code_len * atom_copies? */ duk_int32_t atom_code_length; duk_uint32_t atom_copies; duk_uint32_t tmp_qmin, tmp_qmax; /* pre-check how many atom copies we're willing to make (atom_copies not needed below) */ atom_copies = (re_ctx->curr_token.qmax == DUK_RE_QUANTIFIER_INFINITE) ? re_ctx->curr_token.qmin : re_ctx->curr_token.qmax; if (atom_copies > DUK_RE_MAX_ATOM_COPIES) { DUK_ERROR_RANGE(re_ctx->thr, DUK_STR_QUANTIFIER_TOO_MANY_COPIES); DUK_WO_NORETURN(return;); } /* wipe the capture range made by the atom (if any) */ DUK_ASSERT(atom_start_captures <= re_ctx->captures); if (atom_start_captures != re_ctx->captures) { DUK_ASSERT(atom_start_captures < re_ctx->captures); DUK_DDD(DUK_DDDPRINT("must wipe ]atom_start_captures,re_ctx->captures]: ]%ld,%ld]", (long) atom_start_captures, (long) re_ctx->captures)); /* insert (DUK_REOP_WIPERANGE, start, count) in reverse order so the order ends up right */ duk__insert_u32(re_ctx, (duk_uint32_t) atom_start_offset, (re_ctx->captures - atom_start_captures) * 2U); duk__insert_u32(re_ctx, (duk_uint32_t) atom_start_offset, (atom_start_captures + 1) * 2); duk__insert_u32(re_ctx, (duk_uint32_t) atom_start_offset, DUK_REOP_WIPERANGE); } else { DUK_DDD(DUK_DDDPRINT("no need to wipe captures: atom_start_captures == re_ctx->captures == %ld", (long) atom_start_captures)); } atom_code_length = (duk_int32_t) DUK__RE_BUFLEN(re_ctx) - atom_start_offset; /* insert the required matches (qmin) by copying the atom */ tmp_qmin = re_ctx->curr_token.qmin; tmp_qmax = re_ctx->curr_token.qmax; while (tmp_qmin > 0) { duk__append_slice(re_ctx, (duk_uint32_t) atom_start_offset, (duk_uint32_t) atom_code_length); tmp_qmin--; if (tmp_qmax != DUK_RE_QUANTIFIER_INFINITE) { tmp_qmax--; } } DUK_ASSERT(tmp_qmin == 0); /* insert code for matching the remainder - infinite or finite */ if (tmp_qmax == DUK_RE_QUANTIFIER_INFINITE) { /* reuse last emitted atom for remaining 'infinite' quantifier */ if (re_ctx->curr_token.qmin == 0) { /* Special case: original qmin was zero so there is nothing * to repeat. Emit an atom copy but jump over it here. */ duk__append_reop(re_ctx, DUK_REOP_JUMP); duk__append_jump_offset(re_ctx, atom_code_length); duk__append_slice(re_ctx, (duk_uint32_t) atom_start_offset, (duk_uint32_t) atom_code_length); } if (re_ctx->curr_token.greedy) { duk__append_reop(re_ctx, DUK_REOP_SPLIT2); /* prefer jump */ } else { duk__append_reop(re_ctx, DUK_REOP_SPLIT1); /* prefer direct */ } duk__append_jump_offset(re_ctx, -atom_code_length - 1); /* -1 for opcode */ } else { /* * The remaining matches are emitted as sequence of SPLITs and atom * copies; the SPLITs skip the remaining copies and match the sequel. * This sequence needs to be emitted starting from the last copy * because the SPLITs are variable length due to the variable length * skip offset. This causes a lot of memory copying now. * * Example structure (greedy, match maximum # atoms): * * SPLIT1 LSEQ * (atom) * SPLIT1 LSEQ ; <- the byte length of this instruction is needed * (atom) ; to encode the above SPLIT1 correctly * ... * LSEQ: */ duk_uint32_t offset = (duk_uint32_t) DUK__RE_BUFLEN(re_ctx); while (tmp_qmax > 0) { duk__insert_slice(re_ctx, offset, (duk_uint32_t) atom_start_offset, (duk_uint32_t) atom_code_length); if (re_ctx->curr_token.greedy) { duk__insert_u32(re_ctx, offset, DUK_REOP_SPLIT1); /* prefer direct */ } else { duk__insert_u32(re_ctx, offset, DUK_REOP_SPLIT2); /* prefer jump */ } duk__insert_jump_offset(re_ctx, offset + 1, /* +1 for opcode */ (duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - (offset + 1))); tmp_qmax--; } } /* remove the original 'template' atom */ duk__remove_slice(re_ctx, (duk_uint32_t) atom_start_offset, (duk_uint32_t) atom_code_length); } /* 'taint' result as complex */ res_charlen = -1; break; } case DUK_RETOK_ASSERT_START: { duk__append_reop(re_ctx, DUK_REOP_ASSERT_START); break; } case DUK_RETOK_ASSERT_END: { duk__append_reop(re_ctx, DUK_REOP_ASSERT_END); break; } case DUK_RETOK_ASSERT_WORD_BOUNDARY: { duk__append_reop(re_ctx, DUK_REOP_ASSERT_WORD_BOUNDARY); break; } case DUK_RETOK_ASSERT_NOT_WORD_BOUNDARY: { duk__append_reop(re_ctx, DUK_REOP_ASSERT_NOT_WORD_BOUNDARY); break; } case DUK_RETOK_ASSERT_START_POS_LOOKAHEAD: case DUK_RETOK_ASSERT_START_NEG_LOOKAHEAD: { duk_uint32_t offset; duk_uint32_t opcode = (re_ctx->curr_token.t == DUK_RETOK_ASSERT_START_POS_LOOKAHEAD) ? DUK_REOP_LOOKPOS : DUK_REOP_LOOKNEG; offset = (duk_uint32_t) DUK__RE_BUFLEN(re_ctx); duk__parse_disjunction(re_ctx, 0, &tmp_disj); duk__append_reop(re_ctx, DUK_REOP_MATCH); (void) duk__insert_u32(re_ctx, offset, opcode); (void) duk__insert_jump_offset(re_ctx, offset + 1, /* +1 for opcode */ (duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - (offset + 1))); /* 'taint' result as complex -- this is conservative, * as lookaheads do not backtrack. */ res_charlen = -1; break; } case DUK_RETOK_ATOM_PERIOD: { new_atom_char_length = 1; new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx); duk__append_reop(re_ctx, DUK_REOP_PERIOD); break; } case DUK_RETOK_ATOM_CHAR: { /* Note: successive characters could be joined into string matches * but this is not trivial (consider e.g. '/xyz+/); see docs for * more discussion. * * No support for \u{H+} yet. While only BMP Unicode escapes are * supported for RegExps at present, 'ch' may still be a non-BMP * codepoint if it is decoded straight from source text UTF-8. * There's no non-BMP support yet so this is handled simply by * matching the non-BMP character (which is custom behavior). */ duk_uint32_t ch; new_atom_char_length = 1; new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx); duk__append_reop(re_ctx, DUK_REOP_CHAR); ch = re_ctx->curr_token.num; if (re_ctx->re_flags & DUK_RE_FLAG_IGNORE_CASE) { ch = (duk_uint32_t) duk_unicode_re_canonicalize_char(re_ctx->thr, (duk_codepoint_t) ch); } duk__append_u32(re_ctx, ch); break; } case DUK_RETOK_ATOM_DIGIT: case DUK_RETOK_ATOM_NOT_DIGIT: case DUK_RETOK_ATOM_WHITE: case DUK_RETOK_ATOM_NOT_WHITE: case DUK_RETOK_ATOM_WORD_CHAR: case DUK_RETOK_ATOM_NOT_WORD_CHAR: { duk_small_uint_t re_op; duk_small_uint_t idx; new_atom_char_length = 1; new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx); DUK_ASSERT((DUK_RETOK_ATOM_DIGIT & 0x01) != 0); DUK_ASSERT((DUK_RETOK_ATOM_WHITE & 0x01) != 0); DUK_ASSERT((DUK_RETOK_ATOM_WORD_CHAR & 0x01) != 0); DUK_ASSERT((DUK_RETOK_ATOM_NOT_DIGIT & 0x01) == 0); DUK_ASSERT((DUK_RETOK_ATOM_NOT_WHITE & 0x01) == 0); DUK_ASSERT((DUK_RETOK_ATOM_NOT_WORD_CHAR & 0x01) == 0); re_op = (re_ctx->curr_token.t & 0x01) ? DUK_REOP_RANGES : DUK_REOP_INVRANGES; DUK_ASSERT(DUK_RETOK_ATOM_WHITE == DUK_RETOK_ATOM_DIGIT + 2); DUK_ASSERT(DUK_RETOK_ATOM_WORD_CHAR == DUK_RETOK_ATOM_DIGIT + 4); idx = (duk_small_uint_t) ((re_ctx->curr_token.t - DUK_RETOK_ATOM_DIGIT) >> 1U); DUK_ASSERT(idx <= 2U); /* Assume continuous token numbers; also checks negative underflow. */ duk__append_range_atom_matcher(re_ctx, re_op, duk__re_range_lookup1[idx], duk__re_range_lookup2[idx]); break; } case DUK_RETOK_ATOM_BACKREFERENCE: { duk_uint32_t backref = (duk_uint32_t) re_ctx->curr_token.num; if (backref > re_ctx->highest_backref) { re_ctx->highest_backref = backref; } new_atom_char_length = -1; /* mark as complex */ new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx); duk__append_reop(re_ctx, DUK_REOP_BACKREFERENCE); duk__append_u32(re_ctx, backref); break; } case DUK_RETOK_ATOM_START_CAPTURE_GROUP: { duk_uint32_t cap; new_atom_char_length = -1; /* mark as complex (capture handling) */ new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx); cap = ++re_ctx->captures; duk__append_reop(re_ctx, DUK_REOP_SAVE); duk__append_u32(re_ctx, cap * 2); duk__parse_disjunction(re_ctx, 0, &tmp_disj); /* retval (sub-atom char length) unused, tainted as complex above */ duk__append_reop(re_ctx, DUK_REOP_SAVE); duk__append_u32(re_ctx, cap * 2 + 1); break; } case DUK_RETOK_ATOM_START_NONCAPTURE_GROUP: { new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx); duk__parse_disjunction(re_ctx, 0, &tmp_disj); new_atom_char_length = tmp_disj.charlen; break; } case DUK_RETOK_ATOM_START_CHARCLASS: case DUK_RETOK_ATOM_START_CHARCLASS_INVERTED: { /* * Range parsing is done with a special lexer function which calls * us for every range parsed. This is different from how rest of * the parsing works, but avoids a heavy, arbitrary size intermediate * value type to hold the ranges. * * Another complication is the handling of character ranges when * case insensitive matching is used (see docs for discussion). * The range handler callback given to the lexer takes care of this * as well. * * Note that duplicate ranges are not eliminated when parsing character * classes, so that canonicalization of * * [0-9a-fA-Fx-{] * * creates the result (note the duplicate ranges): * * [0-9A-FA-FX-Z{-{] * * where [x-{] is split as a result of canonicalization. The duplicate * ranges are not a semantics issue: they work correctly. */ duk_uint32_t offset; DUK_DD(DUK_DDPRINT("character class")); /* insert ranges instruction, range count patched in later */ new_atom_char_length = 1; new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx); duk__append_reop(re_ctx, (re_ctx->curr_token.t == DUK_RETOK_ATOM_START_CHARCLASS) ? DUK_REOP_RANGES : DUK_REOP_INVRANGES); offset = (duk_uint32_t) DUK__RE_BUFLEN(re_ctx); /* patch in range count later */ /* parse ranges until character class ends */ re_ctx->nranges = 0; /* note: ctx-wide temporary */ duk_lexer_parse_re_ranges(&re_ctx->lex, duk__regexp_generate_ranges, (void *) re_ctx); /* insert range count */ duk__insert_u32(re_ctx, offset, re_ctx->nranges); break; } case DUK_RETOK_ATOM_END_GROUP: { if (expect_eof) { DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_UNEXPECTED_CLOSING_PAREN); DUK_WO_NORETURN(return;); } goto done; } case DUK_RETOK_EOF: { if (!expect_eof) { DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_UNEXPECTED_END_OF_PATTERN); DUK_WO_NORETURN(return;); } goto done; } default: { DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_UNEXPECTED_REGEXP_TOKEN); DUK_WO_NORETURN(return;); } } /* a complex (new) atom taints the result */ if (new_atom_start_offset >= 0) { if (new_atom_char_length < 0) { res_charlen = -1; } else if (res_charlen >= 0) { /* only advance if not tainted */ res_charlen += new_atom_char_length; } } /* record previous atom info in case next token is a quantifier */ atom_start_offset = new_atom_start_offset; atom_char_length = new_atom_char_length; atom_start_captures = new_atom_start_captures; } done: /* finish up pending jump and split for last alternative */ if (unpatched_disjunction_jump >= 0) { duk_uint32_t offset; DUK_ASSERT(unpatched_disjunction_split >= 0); offset = (duk_uint32_t) unpatched_disjunction_jump; offset += duk__insert_jump_offset(re_ctx, offset, (duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - offset)); /* offset is now target of the pending split (right after jump) */ duk__insert_jump_offset(re_ctx, (duk_uint32_t) unpatched_disjunction_split, (duk_int32_t) offset - unpatched_disjunction_split); } #if 0 out_atom_info->end_captures = re_ctx->captures; #endif out_atom_info->charlen = res_charlen; DUK_DDD(DUK_DDDPRINT("parse disjunction finished: charlen=%ld", (long) out_atom_info->charlen)); re_ctx->recursion_depth--; } /* * Flags parsing (see E5 Section 15.10.4.1). */ DUK_LOCAL duk_uint32_t duk__parse_regexp_flags(duk_hthread *thr, duk_hstring *h) { const duk_uint8_t *p; const duk_uint8_t *p_end; duk_uint32_t flags = 0; p = DUK_HSTRING_GET_DATA(h); p_end = p + DUK_HSTRING_GET_BYTELEN(h); /* Note: can be safely scanned as bytes (undecoded) */ while (p < p_end) { duk_uint8_t c = *p++; switch (c) { case (duk_uint8_t) 'g': { if (flags & DUK_RE_FLAG_GLOBAL) { goto flags_error; } flags |= DUK_RE_FLAG_GLOBAL; break; } case (duk_uint8_t) 'i': { if (flags & DUK_RE_FLAG_IGNORE_CASE) { goto flags_error; } flags |= DUK_RE_FLAG_IGNORE_CASE; break; } case (duk_uint8_t) 'm': { if (flags & DUK_RE_FLAG_MULTILINE) { goto flags_error; } flags |= DUK_RE_FLAG_MULTILINE; break; } default: { goto flags_error; } } } return flags; flags_error: DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_REGEXP_FLAGS); DUK_WO_NORETURN(return 0U;); } /* * Create escaped RegExp source (E5 Section 15.10.3). * * The current approach is to special case the empty RegExp * ('' -> '(?:)') and otherwise replace unescaped '/' characters * with '\/' regardless of where they occur in the regexp. * * Note that normalization does not seem to be necessary for * RegExp literals (e.g. '/foo/') because to be acceptable as * a RegExp literal, the text between forward slashes must * already match the escaping requirements (e.g. must not contain * unescaped forward slashes or be empty). Escaping IS needed * for expressions like 'new Regexp("...", "")' however. * Currently, we re-escape in either case. * * Also note that we process the source here in UTF-8 encoded * form. This is correct, because any non-ASCII characters are * passed through without change. */ DUK_LOCAL void duk__create_escaped_source(duk_hthread *thr, int idx_pattern) { duk_hstring *h; const duk_uint8_t *p; duk_bufwriter_ctx bw_alloc; duk_bufwriter_ctx *bw; duk_uint8_t *q; duk_size_t i, n; duk_uint_fast8_t c_prev, c; h = duk_known_hstring(thr, idx_pattern); p = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h); n = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h); if (n == 0) { duk_push_literal(thr, "(?:)"); return; } bw = &bw_alloc; DUK_BW_INIT_PUSHBUF(thr, bw, n); q = DUK_BW_GET_PTR(thr, bw); c_prev = (duk_uint_fast8_t) 0; for (i = 0; i < n; i++) { c = p[i]; q = DUK_BW_ENSURE_RAW(thr, bw, 2, q); if (c == (duk_uint_fast8_t) '/' && c_prev != (duk_uint_fast8_t) '\\') { /* Unescaped '/' ANYWHERE in the regexp (in disjunction, * inside a character class, ...) => same escape works. */ *q++ = DUK_ASC_BACKSLASH; } *q++ = (duk_uint8_t) c; c_prev = c; } DUK_BW_SETPTR_AND_COMPACT(thr, bw, q); (void) duk_buffer_to_string(thr, -1); /* Safe if input is safe. */ /* [ ... escaped_source ] */ } /* * Exposed regexp compilation primitive. * * Sets up a regexp compilation context, and calls duk__parse_disjunction() to do the * actual parsing. Handles generation of the compiled regexp header and the * "boilerplate" capture of the matching substring (save 0 and 1). Also does some * global level regexp checks after recursive compilation has finished. * * An escaped version of the regexp source, suitable for use as a RegExp instance * 'source' property (see E5 Section 15.10.3), is also left on the stack. * * Input stack: [ pattern flags ] * Output stack: [ bytecode escaped_source ] (both as strings) */ DUK_INTERNAL void duk_regexp_compile(duk_hthread *thr) { duk_re_compiler_ctx re_ctx; duk_lexer_point lex_point; duk_hstring *h_pattern; duk_hstring *h_flags; duk__re_disjunction_info ign_disj; DUK_ASSERT(thr != NULL); /* * Args validation */ /* TypeError if fails */ h_pattern = duk_require_hstring_notsymbol(thr, -2); h_flags = duk_require_hstring_notsymbol(thr, -1); /* * Create normalized 'source' property (E5 Section 15.10.3). */ /* [ ... pattern flags ] */ duk__create_escaped_source(thr, -2); /* [ ... pattern flags escaped_source ] */ /* * Init compilation context */ /* [ ... pattern flags escaped_source buffer ] */ duk_memzero(&re_ctx, sizeof(re_ctx)); DUK_LEXER_INITCTX(&re_ctx.lex); /* duplicate zeroing, expect for (possible) NULL inits */ re_ctx.thr = thr; re_ctx.lex.thr = thr; re_ctx.lex.input = DUK_HSTRING_GET_DATA(h_pattern); re_ctx.lex.input_length = DUK_HSTRING_GET_BYTELEN(h_pattern); re_ctx.lex.token_limit = DUK_RE_COMPILE_TOKEN_LIMIT; re_ctx.recursion_limit = DUK_USE_REGEXP_COMPILER_RECLIMIT; re_ctx.re_flags = duk__parse_regexp_flags(thr, h_flags); DUK_BW_INIT_PUSHBUF(thr, &re_ctx.bw, DUK__RE_INITIAL_BUFSIZE); DUK_DD(DUK_DDPRINT("regexp compiler ctx initialized, flags=0x%08lx, recursion_limit=%ld", (unsigned long) re_ctx.re_flags, (long) re_ctx.recursion_limit)); /* * Init lexer */ lex_point.offset = 0; /* expensive init, just want to fill window */ lex_point.line = 1; DUK_LEXER_SETPOINT(&re_ctx.lex, &lex_point); /* * Compilation */ DUK_DD(DUK_DDPRINT("starting regexp compilation")); duk__append_reop(&re_ctx, DUK_REOP_SAVE); duk__append_7bit(&re_ctx, 0); duk__parse_disjunction(&re_ctx, 1 /*expect_eof*/, &ign_disj); duk__append_reop(&re_ctx, DUK_REOP_SAVE); duk__append_7bit(&re_ctx, 1); duk__append_reop(&re_ctx, DUK_REOP_MATCH); /* * Check for invalid backreferences; note that it is NOT an error * to back-reference a capture group which has not yet been introduced * in the pattern (as in /\1(foo)/); in fact, the backreference will * always match! It IS an error to back-reference a capture group * which will never be introduced in the pattern. Thus, we can check * for such references only after parsing is complete. */ if (re_ctx.highest_backref > re_ctx.captures) { DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_BACKREFS); DUK_WO_NORETURN(return;); } /* * Emit compiled regexp header: flags, ncaptures * (insertion order inverted on purpose) */ duk__insert_u32(&re_ctx, 0, (re_ctx.captures + 1) * 2); duk__insert_u32(&re_ctx, 0, re_ctx.re_flags); /* [ ... pattern flags escaped_source buffer ] */ DUK_BW_COMPACT(thr, &re_ctx.bw); (void) duk_buffer_to_string(thr, -1); /* Safe because flags is at most 7 bit. */ /* [ ... pattern flags escaped_source bytecode ] */ /* * Finalize stack */ duk_remove(thr, -4); /* -> [ ... flags escaped_source bytecode ] */ duk_remove(thr, -3); /* -> [ ... escaped_source bytecode ] */ DUK_DD(DUK_DDPRINT("regexp compilation successful, bytecode: %!T, escaped source: %!T", (duk_tval *) duk_get_tval(thr, -1), (duk_tval *) duk_get_tval(thr, -2))); } /* * Create a RegExp instance (E5 Section 15.10.7). * * Note: the output stack left by duk_regexp_compile() is directly compatible * with the input here. * * Input stack: [ escaped_source bytecode ] (both as strings) * Output stack: [ RegExp ] */ DUK_INTERNAL void duk_regexp_create_instance(duk_hthread *thr) { duk_hobject *h; /* [ ... escaped_source bytecode ] */ duk_push_object(thr); h = duk_known_hobject(thr, -1); duk_insert(thr, -3); /* [ ... regexp_object escaped_source bytecode ] */ DUK_HOBJECT_SET_CLASS_NUMBER(h, DUK_HOBJECT_CLASS_REGEXP); DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h, thr->builtins[DUK_BIDX_REGEXP_PROTOTYPE]); duk_xdef_prop_stridx_short(thr, -3, DUK_STRIDX_INT_BYTECODE, DUK_PROPDESC_FLAGS_NONE); /* [ ... regexp_object escaped_source ] */ /* In ES2015 .source, and the .global, .multiline, etc flags are * inherited getters. Store the escaped source as an internal * property for the getter. */ duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_INT_SOURCE, DUK_PROPDESC_FLAGS_NONE); /* [ ... regexp_object ] */ duk_push_int(thr, 0); duk_xdef_prop_stridx_short(thr, -2, DUK_STRIDX_LAST_INDEX, DUK_PROPDESC_FLAGS_W); /* [ ... regexp_object ] */ } #else /* DUK_USE_REGEXP_SUPPORT */ /* regexp support disabled */ #endif /* DUK_USE_REGEXP_SUPPORT */ /* automatic undefs */ #undef DUK__RE_BUFLEN #undef DUK__RE_INITIAL_BUFSIZE /* * Regexp executor. * * Safety: the ECMAScript executor should prevent user from reading and * replacing regexp bytecode. Even so, the executor must validate all * memory accesses etc. When an invalid access is detected (e.g. a 'save' * opcode to invalid, unallocated index) it should fail with an internal * error but not cause a segmentation fault. * * Notes: * * - Backtrack counts are limited to unsigned 32 bits but should * technically be duk_size_t for strings longer than 4G chars. * This also requires a regexp bytecode change. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_REGEXP_SUPPORT) /* * Helpers for UTF-8 handling * * For bytecode readers the duk_uint32_t and duk_int32_t types are correct * because they're used for more than just codepoints. */ DUK_LOCAL duk_uint32_t duk__bc_get_u32(duk_re_matcher_ctx *re_ctx, const duk_uint8_t **pc) { return (duk_uint32_t) duk_unicode_decode_xutf8_checked(re_ctx->thr, pc, re_ctx->bytecode, re_ctx->bytecode_end); } DUK_LOCAL duk_int32_t duk__bc_get_i32(duk_re_matcher_ctx *re_ctx, const duk_uint8_t **pc) { duk_uint32_t t; /* signed integer encoding needed to work with UTF-8 */ t = (duk_uint32_t) duk_unicode_decode_xutf8_checked(re_ctx->thr, pc, re_ctx->bytecode, re_ctx->bytecode_end); if (t & 1) { return -((duk_int32_t) (t >> 1)); } else { return (duk_int32_t) (t >> 1); } } DUK_LOCAL const duk_uint8_t *duk__utf8_backtrack(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end, duk_uint_fast32_t count) { const duk_uint8_t *p; /* Note: allow backtracking from p == ptr_end */ p = *ptr; if (p < ptr_start || p > ptr_end) { goto fail; } while (count > 0) { for (;;) { p--; if (p < ptr_start) { goto fail; } if ((*p & 0xc0) != 0x80) { /* utf-8 continuation bytes have the form 10xx xxxx */ break; } } count--; } *ptr = p; return p; fail: DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return NULL;); } DUK_LOCAL const duk_uint8_t *duk__utf8_advance(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end, duk_uint_fast32_t count) { const duk_uint8_t *p; p = *ptr; if (p < ptr_start || p >= ptr_end) { goto fail; } while (count > 0) { for (;;) { p++; /* Note: if encoding ends by hitting end of input, we don't check that * the encoding is valid, we just assume it is. */ if (p >= ptr_end || ((*p & 0xc0) != 0x80)) { /* utf-8 continuation bytes have the form 10xx xxxx */ break; } } count--; } *ptr = p; return p; fail: DUK_ERROR_INTERNAL(thr); DUK_WO_NORETURN(return NULL;); } /* * Helpers for dealing with the input string */ /* Get a (possibly canonicalized) input character from current sp. The input * itself is never modified, and captures always record non-canonicalized * characters even in case-insensitive matching. Return <0 if out of input. */ DUK_LOCAL duk_codepoint_t duk__inp_get_cp(duk_re_matcher_ctx *re_ctx, const duk_uint8_t **sp) { duk_codepoint_t res; if (*sp >= re_ctx->input_end) { return -1; } res = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(re_ctx->thr, sp, re_ctx->input, re_ctx->input_end); if (re_ctx->re_flags & DUK_RE_FLAG_IGNORE_CASE) { res = duk_unicode_re_canonicalize_char(re_ctx->thr, res); } return res; } DUK_LOCAL const duk_uint8_t *duk__inp_backtrack(duk_re_matcher_ctx *re_ctx, const duk_uint8_t **sp, duk_uint_fast32_t count) { return duk__utf8_backtrack(re_ctx->thr, sp, re_ctx->input, re_ctx->input_end, count); } /* Backtrack utf-8 input and return a (possibly canonicalized) input character. */ DUK_LOCAL duk_codepoint_t duk__inp_get_prev_cp(duk_re_matcher_ctx *re_ctx, const duk_uint8_t *sp) { /* note: caller 'sp' is intentionally not updated here */ (void) duk__inp_backtrack(re_ctx, &sp, (duk_uint_fast32_t) 1); return duk__inp_get_cp(re_ctx, &sp); } /* * Regexp recursive matching function. * * Returns 'sp' on successful match (points to character after last matched one), * NULL otherwise. * * The C recursion depth limit check is only performed in this function, this * suffices because the function is present in all true recursion required by * regexp execution. */ DUK_LOCAL const duk_uint8_t *duk__match_regexp(duk_re_matcher_ctx *re_ctx, const duk_uint8_t *pc, const duk_uint8_t *sp) { duk_native_stack_check(re_ctx->thr); if (re_ctx->recursion_depth >= re_ctx->recursion_limit) { DUK_ERROR_RANGE(re_ctx->thr, DUK_STR_REGEXP_EXECUTOR_RECURSION_LIMIT); DUK_WO_NORETURN(return NULL;); } re_ctx->recursion_depth++; for (;;) { duk_small_int_t op; if (re_ctx->steps_count >= re_ctx->steps_limit) { DUK_ERROR_RANGE(re_ctx->thr, DUK_STR_REGEXP_EXECUTOR_STEP_LIMIT); DUK_WO_NORETURN(return NULL;); } re_ctx->steps_count++; /* Opcodes are at most 7 bits now so they encode to one byte. If this * were not the case or 'pc' is invalid here (due to a bug etc) we'll * still fail safely through the switch default case. */ DUK_ASSERT(pc[0] <= 0x7fU); #if 0 op = (duk_small_int_t) duk__bc_get_u32(re_ctx, &pc); #endif op = *pc++; DUK_DDD(DUK_DDDPRINT("match: rec=%ld, steps=%ld, pc (after op)=%ld, sp=%ld, op=%ld", (long) re_ctx->recursion_depth, (long) re_ctx->steps_count, (long) (pc - re_ctx->bytecode), (long) (sp - re_ctx->input), (long) op)); switch (op) { case DUK_REOP_MATCH: { goto match; } case DUK_REOP_CHAR: { /* * Byte-based matching would be possible for case-sensitive * matching but not for case-insensitive matching. So, we * match by decoding the input and bytecode character normally. * * Bytecode characters are assumed to be already canonicalized. * Input characters are canonicalized automatically by * duk__inp_get_cp() if necessary. * * There is no opcode for matching multiple characters. The * regexp compiler has trouble joining strings efficiently * during compilation. See doc/regexp.rst for more discussion. */ duk_codepoint_t c1, c2; c1 = (duk_codepoint_t) duk__bc_get_u32(re_ctx, &pc); DUK_ASSERT(!(re_ctx->re_flags & DUK_RE_FLAG_IGNORE_CASE) || c1 == duk_unicode_re_canonicalize_char(re_ctx->thr, c1)); /* canonicalized by compiler */ c2 = duk__inp_get_cp(re_ctx, &sp); /* No need to check for c2 < 0 (end of input): because c1 >= 0, it * will fail the match below automatically and cause goto fail. */ #if 0 if (c2 < 0) { goto fail; } #endif DUK_ASSERT(c1 >= 0); DUK_DDD(DUK_DDDPRINT("char match, c1=%ld, c2=%ld", (long) c1, (long) c2)); if (c1 != c2) { goto fail; } break; } case DUK_REOP_PERIOD: { duk_codepoint_t c; c = duk__inp_get_cp(re_ctx, &sp); if (c < 0 || duk_unicode_is_line_terminator(c)) { /* E5 Sections 15.10.2.8, 7.3 */ goto fail; } break; } case DUK_REOP_RANGES: case DUK_REOP_INVRANGES: { duk_uint32_t n; duk_codepoint_t c; duk_small_int_t match; n = duk__bc_get_u32(re_ctx, &pc); c = duk__inp_get_cp(re_ctx, &sp); if (c < 0) { goto fail; } match = 0; while (n) { duk_codepoint_t r1, r2; r1 = (duk_codepoint_t) duk__bc_get_u32(re_ctx, &pc); r2 = (duk_codepoint_t) duk__bc_get_u32(re_ctx, &pc); DUK_DDD(DUK_DDDPRINT("matching ranges/invranges, n=%ld, r1=%ld, r2=%ld, c=%ld", (long) n, (long) r1, (long) r2, (long) c)); if (c >= r1 && c <= r2) { /* Note: don't bail out early, we must read all the ranges from * bytecode. Another option is to skip them efficiently after * breaking out of here. Prefer smallest code. */ match = 1; } n--; } if (op == DUK_REOP_RANGES) { if (!match) { goto fail; } } else { DUK_ASSERT(op == DUK_REOP_INVRANGES); if (match) { goto fail; } } break; } case DUK_REOP_ASSERT_START: { duk_codepoint_t c; if (sp <= re_ctx->input) { break; } if (!(re_ctx->re_flags & DUK_RE_FLAG_MULTILINE)) { goto fail; } c = duk__inp_get_prev_cp(re_ctx, sp); if (duk_unicode_is_line_terminator(c)) { /* E5 Sections 15.10.2.8, 7.3 */ break; } goto fail; } case DUK_REOP_ASSERT_END: { duk_codepoint_t c; const duk_uint8_t *tmp_sp; tmp_sp = sp; c = duk__inp_get_cp(re_ctx, &tmp_sp); if (c < 0) { break; } if (!(re_ctx->re_flags & DUK_RE_FLAG_MULTILINE)) { goto fail; } if (duk_unicode_is_line_terminator(c)) { /* E5 Sections 15.10.2.8, 7.3 */ break; } goto fail; } case DUK_REOP_ASSERT_WORD_BOUNDARY: case DUK_REOP_ASSERT_NOT_WORD_BOUNDARY: { /* * E5 Section 15.10.2.6. The previous and current character * should -not- be canonicalized as they are now. However, * canonicalization does not affect the result of IsWordChar() * (which depends on Unicode characters never canonicalizing * into ASCII characters) so this does not matter. */ duk_small_int_t w1, w2; if (sp <= re_ctx->input) { w1 = 0; /* not a wordchar */ } else { duk_codepoint_t c; c = duk__inp_get_prev_cp(re_ctx, sp); w1 = duk_unicode_re_is_wordchar(c); } if (sp >= re_ctx->input_end) { w2 = 0; /* not a wordchar */ } else { const duk_uint8_t *tmp_sp = sp; /* dummy so sp won't get updated */ duk_codepoint_t c; c = duk__inp_get_cp(re_ctx, &tmp_sp); w2 = duk_unicode_re_is_wordchar(c); } if (op == DUK_REOP_ASSERT_WORD_BOUNDARY) { if (w1 == w2) { goto fail; } } else { DUK_ASSERT(op == DUK_REOP_ASSERT_NOT_WORD_BOUNDARY); if (w1 != w2) { goto fail; } } break; } case DUK_REOP_JUMP: { duk_int32_t skip; skip = duk__bc_get_i32(re_ctx, &pc); pc += skip; break; } case DUK_REOP_SPLIT1: { /* split1: prefer direct execution (no jump) */ const duk_uint8_t *sub_sp; duk_int32_t skip; skip = duk__bc_get_i32(re_ctx, &pc); sub_sp = duk__match_regexp(re_ctx, pc, sp); if (sub_sp) { sp = sub_sp; goto match; } pc += skip; break; } case DUK_REOP_SPLIT2: { /* split2: prefer jump execution (not direct) */ const duk_uint8_t *sub_sp; duk_int32_t skip; skip = duk__bc_get_i32(re_ctx, &pc); sub_sp = duk__match_regexp(re_ctx, pc + skip, sp); if (sub_sp) { sp = sub_sp; goto match; } break; } case DUK_REOP_SQMINIMAL: { duk_uint32_t q, qmin, qmax; duk_int32_t skip; const duk_uint8_t *sub_sp; qmin = duk__bc_get_u32(re_ctx, &pc); qmax = duk__bc_get_u32(re_ctx, &pc); skip = duk__bc_get_i32(re_ctx, &pc); DUK_DDD(DUK_DDDPRINT("minimal quantifier, qmin=%lu, qmax=%lu, skip=%ld", (unsigned long) qmin, (unsigned long) qmax, (long) skip)); q = 0; while (q <= qmax) { if (q >= qmin) { sub_sp = duk__match_regexp(re_ctx, pc + skip, sp); if (sub_sp) { sp = sub_sp; goto match; } } sub_sp = duk__match_regexp(re_ctx, pc, sp); if (!sub_sp) { break; } sp = sub_sp; q++; } goto fail; } case DUK_REOP_SQGREEDY: { duk_uint32_t q, qmin, qmax, atomlen; duk_int32_t skip; const duk_uint8_t *sub_sp; qmin = duk__bc_get_u32(re_ctx, &pc); qmax = duk__bc_get_u32(re_ctx, &pc); atomlen = duk__bc_get_u32(re_ctx, &pc); skip = duk__bc_get_i32(re_ctx, &pc); DUK_DDD(DUK_DDDPRINT("greedy quantifier, qmin=%lu, qmax=%lu, atomlen=%lu, skip=%ld", (unsigned long) qmin, (unsigned long) qmax, (unsigned long) atomlen, (long) skip)); q = 0; while (q < qmax) { sub_sp = duk__match_regexp(re_ctx, pc, sp); if (!sub_sp) { break; } sp = sub_sp; q++; } while (q >= qmin) { sub_sp = duk__match_regexp(re_ctx, pc + skip, sp); if (sub_sp) { sp = sub_sp; goto match; } if (q == qmin) { break; } /* Note: if atom were to contain e.g. captures, we would need to * re-match the atom to get correct captures. Simply quantifiers * do not allow captures in their atom now, so this is not an issue. */ DUK_DDD(DUK_DDDPRINT("greedy quantifier, backtrack %ld characters (atomlen)", (long) atomlen)); sp = duk__inp_backtrack(re_ctx, &sp, (duk_uint_fast32_t) atomlen); q--; } goto fail; } case DUK_REOP_SAVE: { duk_uint32_t idx; const duk_uint8_t *old; const duk_uint8_t *sub_sp; idx = duk__bc_get_u32(re_ctx, &pc); if (idx >= re_ctx->nsaved) { /* idx is unsigned, < 0 check is not necessary */ DUK_D(DUK_DPRINT("internal error, regexp save index insane: idx=%ld", (long) idx)); goto internal_error; } old = re_ctx->saved[idx]; re_ctx->saved[idx] = sp; sub_sp = duk__match_regexp(re_ctx, pc, sp); if (sub_sp) { sp = sub_sp; goto match; } re_ctx->saved[idx] = old; goto fail; } case DUK_REOP_WIPERANGE: { /* Wipe capture range and save old values for backtracking. * * XXX: this typically happens with a relatively small idx_count. * It might be useful to handle cases where the count is small * (say <= 8) by saving the values in stack instead. This would * reduce memory churn and improve performance, at the cost of a * slightly higher code footprint. */ duk_uint32_t idx_start, idx_count; #if defined(DUK_USE_EXPLICIT_NULL_INIT) duk_uint32_t idx_end, idx; #endif duk_uint8_t **range_save; const duk_uint8_t *sub_sp; idx_start = duk__bc_get_u32(re_ctx, &pc); idx_count = duk__bc_get_u32(re_ctx, &pc); DUK_DDD(DUK_DDDPRINT("wipe saved range: start=%ld, count=%ld -> [%ld,%ld] (captures [%ld,%ld])", (long) idx_start, (long) idx_count, (long) idx_start, (long) (idx_start + idx_count - 1), (long) (idx_start / 2), (long) ((idx_start + idx_count - 1) / 2))); if (idx_start + idx_count > re_ctx->nsaved || idx_count == 0) { /* idx is unsigned, < 0 check is not necessary */ DUK_D(DUK_DPRINT("internal error, regexp wipe indices insane: idx_start=%ld, idx_count=%ld", (long) idx_start, (long) idx_count)); goto internal_error; } DUK_ASSERT(idx_count > 0); duk_require_stack(re_ctx->thr, 1); range_save = (duk_uint8_t **) duk_push_fixed_buffer_nozero(re_ctx->thr, sizeof(duk_uint8_t *) * idx_count); DUK_ASSERT(range_save != NULL); duk_memcpy(range_save, re_ctx->saved + idx_start, sizeof(duk_uint8_t *) * idx_count); #if defined(DUK_USE_EXPLICIT_NULL_INIT) idx_end = idx_start + idx_count; for (idx = idx_start; idx < idx_end; idx++) { re_ctx->saved[idx] = NULL; } #else duk_memzero((void *) (re_ctx->saved + idx_start), sizeof(duk_uint8_t *) * idx_count); #endif sub_sp = duk__match_regexp(re_ctx, pc, sp); if (sub_sp) { /* match: keep wiped/resaved values */ DUK_DDD(DUK_DDDPRINT("match: keep wiped/resaved values [%ld,%ld] (captures [%ld,%ld])", (long) idx_start, (long) (idx_start + idx_count - 1), (long) (idx_start / 2), (long) ((idx_start + idx_count - 1) / 2))); duk_pop_unsafe(re_ctx->thr); sp = sub_sp; goto match; } /* fail: restore saves */ DUK_DDD(DUK_DDDPRINT("fail: restore wiped/resaved values [%ld,%ld] (captures [%ld,%ld])", (long) idx_start, (long) (idx_start + idx_count - 1), (long) (idx_start / 2), (long) ((idx_start + idx_count - 1) / 2))); duk_memcpy((void *) (re_ctx->saved + idx_start), (const void *) range_save, sizeof(duk_uint8_t *) * idx_count); duk_pop_unsafe(re_ctx->thr); goto fail; } case DUK_REOP_LOOKPOS: case DUK_REOP_LOOKNEG: { /* * Needs a save of multiple saved[] entries depending on what range * may be overwritten. Because the regexp parser does no such analysis, * we currently save the entire saved array here. Lookaheads are thus * a bit expensive. Note that the saved array is not needed for just * the lookahead sub-match, but for the matching of the entire sequel. * * The temporary save buffer is pushed on to the valstack to handle * errors correctly. Each lookahead causes a C recursion and pushes * more stuff on the value stack. If the C recursion limit is less * than the value stack slack, there is no need to check the stack. * We do so regardless, just in case. */ duk_int32_t skip; duk_uint8_t **full_save; const duk_uint8_t *sub_sp; DUK_ASSERT(re_ctx->nsaved > 0); duk_require_stack(re_ctx->thr, 1); full_save = (duk_uint8_t **) duk_push_fixed_buffer_nozero(re_ctx->thr, sizeof(duk_uint8_t *) * re_ctx->nsaved); DUK_ASSERT(full_save != NULL); duk_memcpy(full_save, re_ctx->saved, sizeof(duk_uint8_t *) * re_ctx->nsaved); skip = duk__bc_get_i32(re_ctx, &pc); sub_sp = duk__match_regexp(re_ctx, pc, sp); if (op == DUK_REOP_LOOKPOS) { if (!sub_sp) { goto lookahead_fail; } } else { if (sub_sp) { goto lookahead_fail; } } sub_sp = duk__match_regexp(re_ctx, pc + skip, sp); if (sub_sp) { /* match: keep saves */ duk_pop_unsafe(re_ctx->thr); sp = sub_sp; goto match; } /* fall through */ lookahead_fail: /* fail: restore saves */ duk_memcpy((void *) re_ctx->saved, (const void *) full_save, sizeof(duk_uint8_t *) * re_ctx->nsaved); duk_pop_unsafe(re_ctx->thr); goto fail; } case DUK_REOP_BACKREFERENCE: { /* * Byte matching for back-references would be OK in case- * sensitive matching. In case-insensitive matching we need * to canonicalize characters, so back-reference matching needs * to be done with codepoints instead. So, we just decode * everything normally here, too. * * Note: back-reference index which is 0 or higher than * NCapturingParens (= number of capturing parens in the * -entire- regexp) is a compile time error. However, a * backreference referring to a valid capture which has * not matched anything always succeeds! See E5 Section * 15.10.2.9, step 5, sub-step 3. */ duk_uint32_t idx; const duk_uint8_t *p; idx = duk__bc_get_u32(re_ctx, &pc); idx = idx << 1; /* backref n -> saved indices [n*2, n*2+1] */ if (idx < 2 || idx + 1 >= re_ctx->nsaved) { /* regexp compiler should catch these */ DUK_D(DUK_DPRINT("internal error, backreference index insane")); goto internal_error; } if (!re_ctx->saved[idx] || !re_ctx->saved[idx+1]) { /* capture is 'undefined', always matches! */ DUK_DDD(DUK_DDDPRINT("backreference: saved[%ld,%ld] not complete, always match", (long) idx, (long) (idx + 1))); break; } DUK_DDD(DUK_DDDPRINT("backreference: match saved[%ld,%ld]", (long) idx, (long) (idx + 1))); p = re_ctx->saved[idx]; while (p < re_ctx->saved[idx+1]) { duk_codepoint_t c1, c2; /* Note: not necessary to check p against re_ctx->input_end: * the memory access is checked by duk__inp_get_cp(), while * valid compiled regexps cannot write a saved[] entry * which points to outside the string. */ c1 = duk__inp_get_cp(re_ctx, &p); DUK_ASSERT(c1 >= 0); c2 = duk__inp_get_cp(re_ctx, &sp); /* No need for an explicit c2 < 0 check: because c1 >= 0, * the comparison will always fail if c2 < 0. */ #if 0 if (c2 < 0) { goto fail; } #endif if (c1 != c2) { goto fail; } } break; } default: { DUK_D(DUK_DPRINT("internal error, regexp opcode error: %ld", (long) op)); goto internal_error; } } } match: re_ctx->recursion_depth--; return sp; fail: re_ctx->recursion_depth--; return NULL; internal_error: DUK_ERROR_INTERNAL(re_ctx->thr); DUK_WO_NORETURN(return NULL;); } /* * Exposed matcher function which provides the semantics of RegExp.prototype.exec(). * * RegExp.prototype.test() has the same semantics as exec() but does not return the * result object (which contains the matching string and capture groups). Currently * there is no separate test() helper, so a temporary result object is created and * discarded if test() is needed. This is intentional, to save code space. * * Input stack: [ ... re_obj input ] * Output stack: [ ... result ] */ DUK_LOCAL void duk__regexp_match_helper(duk_hthread *thr, duk_small_int_t force_global) { duk_re_matcher_ctx re_ctx; duk_hobject *h_regexp; duk_hstring *h_bytecode; duk_hstring *h_input; duk_uint8_t *p_buf; const duk_uint8_t *pc; const duk_uint8_t *sp; duk_small_int_t match = 0; duk_small_int_t global; duk_uint_fast32_t i; double d; duk_uint32_t char_offset; DUK_ASSERT(thr != NULL); DUK_DD(DUK_DDPRINT("regexp match: regexp=%!T, input=%!T", (duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1))); /* * Regexp instance check, bytecode check, input coercion. * * See E5 Section 15.10.6. */ /* TypeError if wrong; class check, see E5 Section 15.10.6 */ h_regexp = duk_require_hobject_with_class(thr, -2, DUK_HOBJECT_CLASS_REGEXP); DUK_ASSERT(h_regexp != NULL); DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(h_regexp) == DUK_HOBJECT_CLASS_REGEXP); DUK_UNREF(h_regexp); h_input = duk_to_hstring(thr, -1); DUK_ASSERT(h_input != NULL); duk_xget_owndataprop_stridx_short(thr, -2, DUK_STRIDX_INT_BYTECODE); /* [ ... re_obj input ] -> [ ... re_obj input bc ] */ h_bytecode = duk_require_hstring(thr, -1); /* no regexp instance should exist without a non-configurable bytecode property */ DUK_ASSERT(h_bytecode != NULL); /* * Basic context initialization. * * Some init values are read from the bytecode header * whose format is (UTF-8 codepoints): * * uint flags * uint nsaved (even, 2n+2 where n = num captures) */ /* [ ... re_obj input bc ] */ duk_memzero(&re_ctx, sizeof(re_ctx)); re_ctx.thr = thr; re_ctx.input = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input); re_ctx.input_end = re_ctx.input + DUK_HSTRING_GET_BYTELEN(h_input); re_ctx.bytecode = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_bytecode); re_ctx.bytecode_end = re_ctx.bytecode + DUK_HSTRING_GET_BYTELEN(h_bytecode); re_ctx.saved = NULL; re_ctx.recursion_limit = DUK_USE_REGEXP_EXECUTOR_RECLIMIT; re_ctx.steps_limit = DUK_RE_EXECUTE_STEPS_LIMIT; /* read header */ pc = re_ctx.bytecode; re_ctx.re_flags = duk__bc_get_u32(&re_ctx, &pc); re_ctx.nsaved = duk__bc_get_u32(&re_ctx, &pc); re_ctx.bytecode = pc; DUK_ASSERT(DUK_RE_FLAG_GLOBAL < 0x10000UL); /* must fit into duk_small_int_t */ global = (duk_small_int_t) (force_global | (duk_small_int_t) (re_ctx.re_flags & DUK_RE_FLAG_GLOBAL)); DUK_ASSERT(re_ctx.nsaved >= 2); DUK_ASSERT((re_ctx.nsaved % 2) == 0); p_buf = (duk_uint8_t *) duk_push_fixed_buffer(thr, sizeof(duk_uint8_t *) * re_ctx.nsaved); /* rely on zeroing */ DUK_UNREF(p_buf); re_ctx.saved = (const duk_uint8_t **) duk_get_buffer(thr, -1, NULL); DUK_ASSERT(re_ctx.saved != NULL); /* [ ... re_obj input bc saved_buf ] */ #if defined(DUK_USE_EXPLICIT_NULL_INIT) for (i = 0; i < re_ctx.nsaved; i++) { re_ctx.saved[i] = (duk_uint8_t *) NULL; } #elif defined(DUK_USE_ZERO_BUFFER_DATA) /* buffer is automatically zeroed */ #else duk_memzero((void *) p_buf, sizeof(duk_uint8_t *) * re_ctx.nsaved); #endif DUK_DDD(DUK_DDDPRINT("regexp ctx initialized, flags=0x%08lx, nsaved=%ld, recursion_limit=%ld, steps_limit=%ld", (unsigned long) re_ctx.re_flags, (long) re_ctx.nsaved, (long) re_ctx.recursion_limit, (long) re_ctx.steps_limit)); /* * Get starting character offset for match, and initialize 'sp' based on it. * * Note: lastIndex is non-configurable so it must be present (we check the * internal class of the object above, so we know it is). User code can set * its value to an arbitrary (garbage) value though; E5 requires that lastIndex * be coerced to a number before using. The code below works even if the * property is missing: the value will then be coerced to zero. * * Note: lastIndex may be outside Uint32 range even after ToInteger() coercion. * For instance, ToInteger(+Infinity) = +Infinity. We track the match offset * as an integer, but pre-check it to be inside the 32-bit range before the loop. * If not, the check in E5 Section 15.10.6.2, step 9.a applies. */ /* XXX: lastIndex handling produces a lot of asm */ /* [ ... re_obj input bc saved_buf ] */ duk_get_prop_stridx_short(thr, -4, DUK_STRIDX_LAST_INDEX); /* -> [ ... re_obj input bc saved_buf lastIndex ] */ (void) duk_to_int(thr, -1); /* ToInteger(lastIndex) */ d = duk_get_number(thr, -1); /* integer, but may be +/- Infinite, +/- zero (not NaN, though) */ duk_pop_nodecref_unsafe(thr); if (global) { if (d < 0.0 || d > (double) DUK_HSTRING_GET_CHARLEN(h_input)) { /* match fail */ char_offset = 0; /* not really necessary */ DUK_ASSERT(match == 0); goto match_over; } char_offset = (duk_uint32_t) d; } else { /* lastIndex must be ignored for non-global regexps, but get the * value for (theoretical) side effects. No side effects can * really occur, because lastIndex is a normal property and is * always non-configurable for RegExp instances. */ char_offset = (duk_uint32_t) 0; } DUK_ASSERT(char_offset <= DUK_HSTRING_GET_CHARLEN(h_input)); sp = re_ctx.input + duk_heap_strcache_offset_char2byte(thr, h_input, char_offset); /* * Match loop. * * Try matching at different offsets until match found or input exhausted. */ /* [ ... re_obj input bc saved_buf ] */ DUK_ASSERT(match == 0); for (;;) { /* char offset in [0, h_input->clen] (both ends inclusive), checked before entry */ DUK_ASSERT_DISABLE(char_offset >= 0); DUK_ASSERT(char_offset <= DUK_HSTRING_GET_CHARLEN(h_input)); /* Note: re_ctx.steps is intentionally not reset, it applies to the entire unanchored match */ DUK_ASSERT(re_ctx.recursion_depth == 0); DUK_DDD(DUK_DDDPRINT("attempt match at char offset %ld; %p [%p,%p]", (long) char_offset, (const void *) sp, (const void *) re_ctx.input, (const void *) re_ctx.input_end)); /* * Note: * * - duk__match_regexp() is required not to longjmp() in ordinary "non-match" * conditions; a longjmp() will terminate the entire matching process. * * - Clearing saved[] is not necessary because backtracking does it * * - Backtracking also rewinds re_ctx.recursion back to zero, unless an * internal/limit error occurs (which causes a longjmp()) * * - If we supported anchored matches, we would break out here * unconditionally; however, ECMAScript regexps don't have anchored * matches. It might make sense to implement a fast bail-out if * the regexp begins with '^' and sp is not 0: currently we'll just * run through the entire input string, trivially failing the match * at every non-zero offset. */ if (duk__match_regexp(&re_ctx, re_ctx.bytecode, sp) != NULL) { DUK_DDD(DUK_DDDPRINT("match at offset %ld", (long) char_offset)); match = 1; break; } /* advance by one character (code point) and one char_offset */ char_offset++; if (char_offset > DUK_HSTRING_GET_CHARLEN(h_input)) { /* * Note: * * - Intentionally attempt (empty) match at char_offset == k_input->clen * * - Negative char_offsets have been eliminated and char_offset is duk_uint32_t * -> no need or use for a negative check */ DUK_DDD(DUK_DDDPRINT("no match after trying all sp offsets")); break; } /* avoid calling at end of input, will DUK_ERROR (above check suffices to avoid this) */ (void) duk__utf8_advance(thr, &sp, re_ctx.input, re_ctx.input_end, (duk_uint_fast32_t) 1); } match_over: /* * Matching complete, create result array or return a 'null'. Update lastIndex * if necessary. See E5 Section 15.10.6.2. * * Because lastIndex is a character (not byte) offset, we need the character * length of the match which we conveniently get as a side effect of interning * the matching substring (0th index of result array). * * saved[0] start pointer (~ byte offset) of current match * saved[1] end pointer (~ byte offset) of current match (exclusive) * char_offset start character offset of current match (-> .index of result) * char_end_offset end character offset (computed below) */ /* [ ... re_obj input bc saved_buf ] */ if (match) { #if defined(DUK_USE_ASSERTIONS) duk_hobject *h_res; #endif duk_uint32_t char_end_offset = 0; DUK_DDD(DUK_DDDPRINT("regexp matches at char_offset %ld", (long) char_offset)); DUK_ASSERT(re_ctx.nsaved >= 2); /* must have start and end */ DUK_ASSERT((re_ctx.nsaved % 2) == 0); /* and even number */ /* XXX: Array size is known before and (2 * re_ctx.nsaved) but not taken * advantage of now. The array is not compacted either, as regexp match * objects are usually short lived. */ duk_push_array(thr); #if defined(DUK_USE_ASSERTIONS) h_res = duk_require_hobject(thr, -1); DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h_res)); DUK_ASSERT(DUK_HOBJECT_HAS_EXOTIC_ARRAY(h_res)); DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(h_res) == DUK_HOBJECT_CLASS_ARRAY); #endif /* [ ... re_obj input bc saved_buf res_obj ] */ duk_push_u32(thr, char_offset); duk_xdef_prop_stridx_short_wec(thr, -2, DUK_STRIDX_INDEX); duk_dup_m4(thr); duk_xdef_prop_stridx_short_wec(thr, -2, DUK_STRIDX_INPUT); for (i = 0; i < re_ctx.nsaved; i += 2) { /* Captures which are undefined have NULL pointers and are returned * as 'undefined'. The same is done when saved[] pointers are insane * (this should, of course, never happen in practice). */ if (re_ctx.saved[i] && re_ctx.saved[i + 1] && re_ctx.saved[i + 1] >= re_ctx.saved[i]) { duk_push_lstring(thr, (const char *) re_ctx.saved[i], (duk_size_t) (re_ctx.saved[i+1] - re_ctx.saved[i])); if (i == 0) { /* Assumes that saved[0] and saved[1] are always * set by regexp bytecode (if not, char_end_offset * will be zero). Also assumes clen reflects the * correct char length. */ char_end_offset = char_offset + (duk_uint32_t) duk_get_length(thr, -1); /* add charlen */ } } else { duk_push_undefined(thr); } /* [ ... re_obj input bc saved_buf res_obj val ] */ duk_put_prop_index(thr, -2, (duk_uarridx_t) (i / 2)); } /* [ ... re_obj input bc saved_buf res_obj ] */ /* NB: 'length' property is automatically updated by the array setup loop */ if (global) { /* global regexp: lastIndex updated on match */ duk_push_u32(thr, char_end_offset); duk_put_prop_stridx_short(thr, -6, DUK_STRIDX_LAST_INDEX); } else { /* non-global regexp: lastIndex never updated on match */ ; } } else { /* * No match, E5 Section 15.10.6.2, step 9.a.i - 9.a.ii apply, regardless * of 'global' flag of the RegExp. In particular, if lastIndex is invalid * initially, it is reset to zero. */ DUK_DDD(DUK_DDDPRINT("regexp does not match")); duk_push_null(thr); /* [ ... re_obj input bc saved_buf res_obj ] */ duk_push_int(thr, 0); duk_put_prop_stridx_short(thr, -6, DUK_STRIDX_LAST_INDEX); } /* [ ... re_obj input bc saved_buf res_obj ] */ duk_insert(thr, -5); /* [ ... res_obj re_obj input bc saved_buf ] */ duk_pop_n_unsafe(thr, 4); /* [ ... res_obj ] */ /* XXX: these last tricks are unnecessary if the function is made * a genuine native function. */ } DUK_INTERNAL void duk_regexp_match(duk_hthread *thr) { duk__regexp_match_helper(thr, 0 /*force_global*/); } /* This variant is needed by String.prototype.split(); it needs to perform * global-style matching on a cloned RegExp which is potentially non-global. */ DUK_INTERNAL void duk_regexp_match_force_global(duk_hthread *thr) { duk__regexp_match_helper(thr, 1 /*force_global*/); } #else /* DUK_USE_REGEXP_SUPPORT */ /* regexp support disabled */ #endif /* DUK_USE_REGEXP_SUPPORT */ /* * Self tests to ensure execution environment is sane. Intended to catch * compiler/platform problems which cannot be detected at compile time. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_SELF_TESTS) /* * Unions and structs for self tests */ typedef union { double d; duk_uint8_t x[8]; } duk__test_double_union; /* Self test failed. Expects a local variable 'error_count' to exist. */ #define DUK__FAILED(msg) do { \ DUK_D(DUK_DPRINT("self test failed: " #msg " at " DUK_FILE_MACRO ":" DUK_MACRO_STRINGIFY(DUK_LINE_MACRO))); \ error_count++; \ } while (0) #define DUK__DBLUNION_CMP_TRUE(a,b) do { \ if (duk_memcmp((const void *) (a), (const void *) (b), sizeof(duk__test_double_union)) != 0) { \ DUK__FAILED("double union compares false (expected true)"); \ } \ } while (0) #define DUK__DBLUNION_CMP_FALSE(a,b) do { \ if (duk_memcmp((const void *) (a), (const void *) (b), sizeof(duk__test_double_union)) == 0) { \ DUK__FAILED("double union compares true (expected false)"); \ } \ } while (0) typedef union { duk_uint32_t i; duk_uint8_t x[8]; } duk__test_u32_union; #if defined(DUK_USE_INTEGER_LE) #define DUK__U32_INIT(u, a, b, c, d) do { \ (u)->x[0] = (d); (u)->x[1] = (c); (u)->x[2] = (b); (u)->x[3] = (a); \ } while (0) #elif defined(DUK_USE_INTEGER_ME) #error integer mixed endian not supported now #elif defined(DUK_USE_INTEGER_BE) #define DUK__U32_INIT(u, a, b, c, d) do { \ (u)->x[0] = (a); (u)->x[1] = (b); (u)->x[2] = (c); (u)->x[3] = (d); \ } while (0) #else #error unknown integer endianness #endif #if defined(DUK_USE_DOUBLE_LE) #define DUK__DOUBLE_INIT(u, a, b, c, d, e, f, g, h) do { \ (u)->x[0] = (h); (u)->x[1] = (g); (u)->x[2] = (f); (u)->x[3] = (e); \ (u)->x[4] = (d); (u)->x[5] = (c); (u)->x[6] = (b); (u)->x[7] = (a); \ } while (0) #define DUK__DOUBLE_COMPARE(u, a, b, c, d, e, f, g, h) \ ((u)->x[0] == (h) && (u)->x[1] == (g) && (u)->x[2] == (f) && (u)->x[3] == (e) && \ (u)->x[4] == (d) && (u)->x[5] == (c) && (u)->x[6] == (b) && (u)->x[7] == (a)) #elif defined(DUK_USE_DOUBLE_ME) #define DUK__DOUBLE_INIT(u, a, b, c, d, e, f, g, h) do { \ (u)->x[0] = (d); (u)->x[1] = (c); (u)->x[2] = (b); (u)->x[3] = (a); \ (u)->x[4] = (h); (u)->x[5] = (g); (u)->x[6] = (f); (u)->x[7] = (e); \ } while (0) #define DUK__DOUBLE_COMPARE(u, a, b, c, d, e, f, g, h) \ ((u)->x[0] == (d) && (u)->x[1] == (c) && (u)->x[2] == (b) && (u)->x[3] == (a) && \ (u)->x[4] == (h) && (u)->x[5] == (g) && (u)->x[6] == (f) && (u)->x[7] == (e)) #elif defined(DUK_USE_DOUBLE_BE) #define DUK__DOUBLE_INIT(u, a, b, c, d, e, f, g, h) do { \ (u)->x[0] = (a); (u)->x[1] = (b); (u)->x[2] = (c); (u)->x[3] = (d); \ (u)->x[4] = (e); (u)->x[5] = (f); (u)->x[6] = (g); (u)->x[7] = (h); \ } while (0) #define DUK__DOUBLE_COMPARE(u, a, b, c, d, e, f, g, h) \ ((u)->x[0] == (a) && (u)->x[1] == (b) && (u)->x[2] == (c) && (u)->x[3] == (d) && \ (u)->x[4] == (e) && (u)->x[5] == (f) && (u)->x[6] == (g) && (u)->x[7] == (h)) #else #error unknown double endianness #endif /* * Various sanity checks for typing */ DUK_LOCAL duk_uint_t duk__selftest_types(void) { duk_uint_t error_count = 0; if (!(sizeof(duk_int8_t) == 1 && sizeof(duk_uint8_t) == 1 && sizeof(duk_int16_t) == 2 && sizeof(duk_uint16_t) == 2 && sizeof(duk_int32_t) == 4 && sizeof(duk_uint32_t) == 4)) { DUK__FAILED("duk_(u)int{8,16,32}_t size"); } #if defined(DUK_USE_64BIT_OPS) if (!(sizeof(duk_int64_t) == 8 && sizeof(duk_uint64_t) == 8)) { DUK__FAILED("duk_(u)int64_t size"); } #endif if (!(sizeof(duk_size_t) >= sizeof(duk_uint_t))) { /* Some internal code now assumes that all duk_uint_t values * can be expressed with a duk_size_t. */ DUK__FAILED("duk_size_t is smaller than duk_uint_t"); } if (!(sizeof(duk_int_t) >= 4)) { DUK__FAILED("duk_int_t is not 32 bits"); } return error_count; } /* * Packed tval sanity */ DUK_LOCAL duk_uint_t duk__selftest_packed_tval(void) { duk_uint_t error_count = 0; #if defined(DUK_USE_PACKED_TVAL) if (sizeof(void *) > 4) { DUK__FAILED("packed duk_tval in use but sizeof(void *) > 4"); } #endif return error_count; } /* * Two's complement arithmetic. */ DUK_LOCAL duk_uint_t duk__selftest_twos_complement(void) { duk_uint_t error_count = 0; volatile int test; test = -1; /* Note that byte order doesn't affect this test: all bytes in * 'test' will be 0xFF for two's complement. */ if (((volatile duk_uint8_t *) &test)[0] != (duk_uint8_t) 0xff) { DUK__FAILED("two's complement arithmetic"); } return error_count; } /* * Byte order. Important to self check, because on some exotic platforms * there is no actual detection but rather assumption based on platform * defines. */ DUK_LOCAL duk_uint_t duk__selftest_byte_order(void) { duk_uint_t error_count = 0; duk__test_u32_union u1; duk__test_double_union u2; /* * >>> struct.pack('>d', 102030405060).encode('hex') * '4237c17c6dc40000' */ DUK__U32_INIT(&u1, 0xde, 0xad, 0xbe, 0xef); DUK__DOUBLE_INIT(&u2, 0x42, 0x37, 0xc1, 0x7c, 0x6d, 0xc4, 0x00, 0x00); if (u1.i != (duk_uint32_t) 0xdeadbeefUL) { DUK__FAILED("duk_uint32_t byte order"); } if (u2.d != (double) 102030405060.0) { DUK__FAILED("double byte order"); } return error_count; } /* * DUK_BSWAP macros */ DUK_LOCAL duk_uint_t duk__selftest_bswap_macros(void) { duk_uint_t error_count = 0; volatile duk_uint32_t x32_input, x32_output; duk_uint32_t x32; volatile duk_uint16_t x16_input, x16_output; duk_uint16_t x16; duk_double_union du; duk_double_t du_diff; #if defined(DUK_BSWAP64) volatile duk_uint64_t x64_input, x64_output; duk_uint64_t x64; #endif /* Cover both compile time and runtime bswap operations, as these * may have different bugs. */ x16_input = 0xbeefUL; x16 = x16_input; x16 = DUK_BSWAP16(x16); x16_output = x16; if (x16_output != (duk_uint16_t) 0xefbeUL) { DUK__FAILED("DUK_BSWAP16"); } x16 = 0xbeefUL; x16 = DUK_BSWAP16(x16); if (x16 != (duk_uint16_t) 0xefbeUL) { DUK__FAILED("DUK_BSWAP16"); } x32_input = 0xdeadbeefUL; x32 = x32_input; x32 = DUK_BSWAP32(x32); x32_output = x32; if (x32_output != (duk_uint32_t) 0xefbeaddeUL) { DUK__FAILED("DUK_BSWAP32"); } x32 = 0xdeadbeefUL; x32 = DUK_BSWAP32(x32); if (x32 != (duk_uint32_t) 0xefbeaddeUL) { DUK__FAILED("DUK_BSWAP32"); } #if defined(DUK_BSWAP64) x64_input = DUK_U64_CONSTANT(0x8899aabbccddeeff); x64 = x64_input; x64 = DUK_BSWAP64(x64); x64_output = x64; if (x64_output != (duk_uint64_t) DUK_U64_CONSTANT(0xffeeddccbbaa9988)) { DUK__FAILED("DUK_BSWAP64"); } x64 = DUK_U64_CONSTANT(0x8899aabbccddeeff); x64 = DUK_BSWAP64(x64); if (x64 != (duk_uint64_t) DUK_U64_CONSTANT(0xffeeddccbbaa9988)) { DUK__FAILED("DUK_BSWAP64"); } #endif /* >>> struct.unpack('>d', '4000112233445566'.decode('hex')) * (2.008366013071895,) */ du.uc[0] = 0x40; du.uc[1] = 0x00; du.uc[2] = 0x11; du.uc[3] = 0x22; du.uc[4] = 0x33; du.uc[5] = 0x44; du.uc[6] = 0x55; du.uc[7] = 0x66; DUK_DBLUNION_DOUBLE_NTOH(&du); du_diff = du.d - 2.008366013071895; #if 0 DUK_D(DUK_DPRINT("du_diff: %lg\n", (double) du_diff)); #endif if (du_diff > 1e-15) { /* Allow very small lenience because some compilers won't parse * exact IEEE double constants (happened in matrix testing with * Linux gcc-4.8 -m32 at least). */ #if 0 DUK_D(DUK_DPRINT("Result of DUK_DBLUNION_DOUBLE_NTOH: %02x %02x %02x %02x %02x %02x %02x %02x\n", (unsigned int) du.uc[0], (unsigned int) du.uc[1], (unsigned int) du.uc[2], (unsigned int) du.uc[3], (unsigned int) du.uc[4], (unsigned int) du.uc[5], (unsigned int) du.uc[6], (unsigned int) du.uc[7])); #endif DUK__FAILED("DUK_DBLUNION_DOUBLE_NTOH"); } return error_count; } /* * Basic double / byte union memory layout. */ DUK_LOCAL duk_uint_t duk__selftest_double_union_size(void) { duk_uint_t error_count = 0; if (sizeof(duk__test_double_union) != 8) { DUK__FAILED("invalid union size"); } return error_count; } /* * Union aliasing, see misc/clang_aliasing.c. */ DUK_LOCAL duk_uint_t duk__selftest_double_aliasing(void) { /* This testcase fails when Emscripten-generated code runs on Firefox. * It's not an issue because the failure should only affect packed * duk_tval representation, which is not used with Emscripten. */ #if defined(DUK_USE_PACKED_TVAL) duk_uint_t error_count = 0; duk__test_double_union a, b; /* Test signaling NaN and alias assignment in all endianness combinations. */ /* little endian */ a.x[0] = 0x11; a.x[1] = 0x22; a.x[2] = 0x33; a.x[3] = 0x44; a.x[4] = 0x00; a.x[5] = 0x00; a.x[6] = 0xf1; a.x[7] = 0xff; b = a; DUK__DBLUNION_CMP_TRUE(&a, &b); /* big endian */ a.x[0] = 0xff; a.x[1] = 0xf1; a.x[2] = 0x00; a.x[3] = 0x00; a.x[4] = 0x44; a.x[5] = 0x33; a.x[6] = 0x22; a.x[7] = 0x11; b = a; DUK__DBLUNION_CMP_TRUE(&a, &b); /* mixed endian */ a.x[0] = 0x00; a.x[1] = 0x00; a.x[2] = 0xf1; a.x[3] = 0xff; a.x[4] = 0x11; a.x[5] = 0x22; a.x[6] = 0x33; a.x[7] = 0x44; b = a; DUK__DBLUNION_CMP_TRUE(&a, &b); return error_count; #else DUK_D(DUK_DPRINT("skip double aliasing self test when duk_tval is not packed")); return 0; #endif } /* * Zero sign, see misc/tcc_zerosign2.c. */ DUK_LOCAL duk_uint_t duk__selftest_double_zero_sign(void) { duk_uint_t error_count = 0; duk__test_double_union a, b; a.d = 0.0; b.d = -a.d; DUK__DBLUNION_CMP_FALSE(&a, &b); return error_count; } /* * Rounding mode: Duktape assumes round-to-nearest, check that this is true. * If we had C99 fenv.h we could check that fegetround() == FE_TONEAREST, * but we don't want to rely on that header; and even if we did, it's good * to ensure the rounding actually works. */ DUK_LOCAL duk_uint_t duk__selftest_double_rounding(void) { duk_uint_t error_count = 0; duk__test_double_union a, b, c; #if 0 /* Include and test manually; these trigger failures: */ fesetround(FE_UPWARD); fesetround(FE_DOWNWARD); fesetround(FE_TOWARDZERO); /* This is the default and passes. */ fesetround(FE_TONEAREST); #endif /* Rounding tests check that none of the other modes (round to * +Inf, round to -Inf, round to zero) can be active: * http://www.gnu.org/software/libc/manual/html_node/Rounding.html */ /* 1.0 + 2^(-53): result is midway between 1.0 and 1.0 + ulp. * Round to nearest: 1.0 * Round to +Inf: 1.0 + ulp * Round to -Inf: 1.0 * Round to zero: 1.0 * => Correct result eliminates round to +Inf. */ DUK__DOUBLE_INIT(&a, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); DUK__DOUBLE_INIT(&b, 0x3c, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); duk_memset((void *) &c, 0, sizeof(c)); c.d = a.d + b.d; if (!DUK__DOUBLE_COMPARE(&c, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)) { DUK_D(DUK_DPRINT("broken result (native endiannesss): %02x %02x %02x %02x %02x %02x %02x %02x", (unsigned int) c.x[0], (unsigned int) c.x[1], (unsigned int) c.x[2], (unsigned int) c.x[3], (unsigned int) c.x[4], (unsigned int) c.x[5], (unsigned int) c.x[6], (unsigned int) c.x[7])); DUK__FAILED("invalid result from 1.0 + 0.5ulp"); } /* (1.0 + ulp) + 2^(-53): result is midway between 1.0 + ulp and 1.0 + 2*ulp. * Round to nearest: 1.0 + 2*ulp (round to even mantissa) * Round to +Inf: 1.0 + 2*ulp * Round to -Inf: 1.0 + ulp * Round to zero: 1.0 + ulp * => Correct result eliminates round to -Inf and round to zero. */ DUK__DOUBLE_INIT(&a, 0x3f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01); DUK__DOUBLE_INIT(&b, 0x3c, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); duk_memset((void *) &c, 0, sizeof(c)); c.d = a.d + b.d; if (!DUK__DOUBLE_COMPARE(&c, 0x3f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02)) { DUK_D(DUK_DPRINT("broken result (native endiannesss): %02x %02x %02x %02x %02x %02x %02x %02x", (unsigned int) c.x[0], (unsigned int) c.x[1], (unsigned int) c.x[2], (unsigned int) c.x[3], (unsigned int) c.x[4], (unsigned int) c.x[5], (unsigned int) c.x[6], (unsigned int) c.x[7])); DUK__FAILED("invalid result from (1.0 + ulp) + 0.5ulp"); } /* Could do negative number testing too, but the tests above should * differentiate between IEEE 754 rounding modes. */ return error_count; } /* * fmod(): often a portability issue in embedded or bare platform targets. * Check for at least minimally correct behavior. Unlike some other math * functions (like cos()) Duktape relies on fmod() internally too. */ DUK_LOCAL duk_uint_t duk__selftest_fmod(void) { duk_uint_t error_count = 0; duk__test_double_union u1, u2; volatile duk_double_t t1, t2, t3; /* fmod() with integer argument and exponent 2^32 is used by e.g. * ToUint32() and some Duktape internals. */ u1.d = DUK_FMOD(10.0, 4294967296.0); u2.d = 10.0; DUK__DBLUNION_CMP_TRUE(&u1, &u2); u1.d = DUK_FMOD(4294967306.0, 4294967296.0); u2.d = 10.0; DUK__DBLUNION_CMP_TRUE(&u1, &u2); u1.d = DUK_FMOD(73014444042.0, 4294967296.0); u2.d = 10.0; DUK__DBLUNION_CMP_TRUE(&u1, &u2); /* 52-bit integer split into two parts: * >>> 0x1fedcba9876543 * 8987183256397123 * >>> float(0x1fedcba9876543) / float(2**53) * 0.9977777777777778 */ u1.d = DUK_FMOD(8987183256397123.0, 4294967296.0); u2.d = (duk_double_t) 0xa9876543UL; DUK__DBLUNION_CMP_TRUE(&u1, &u2); t1 = 8987183256397123.0; t2 = 4294967296.0; t3 = t1 / t2; u1.d = DUK_FLOOR(t3); u2.d = (duk_double_t) 0x1fedcbUL; DUK__DBLUNION_CMP_TRUE(&u1, &u2); /* C99 behavior is for fmod() result sign to mathc argument sign. */ u1.d = DUK_FMOD(-10.0, 4294967296.0); u2.d = -10.0; DUK__DBLUNION_CMP_TRUE(&u1, &u2); u1.d = DUK_FMOD(-4294967306.0, 4294967296.0); u2.d = -10.0; DUK__DBLUNION_CMP_TRUE(&u1, &u2); u1.d = DUK_FMOD(-73014444042.0, 4294967296.0); u2.d = -10.0; DUK__DBLUNION_CMP_TRUE(&u1, &u2); return error_count; } /* * Struct size/alignment if platform requires it * * There are some compiler specific struct padding pragmas etc in use, this * selftest ensures they're correctly detected and used. */ DUK_LOCAL duk_uint_t duk__selftest_struct_align(void) { duk_uint_t error_count = 0; #if (DUK_USE_ALIGN_BY == 4) if ((sizeof(duk_hbuffer_fixed) % 4) != 0) { DUK__FAILED("sizeof(duk_hbuffer_fixed) not aligned to 4"); } #elif (DUK_USE_ALIGN_BY == 8) if ((sizeof(duk_hbuffer_fixed) % 8) != 0) { DUK__FAILED("sizeof(duk_hbuffer_fixed) not aligned to 8"); } #elif (DUK_USE_ALIGN_BY == 1) /* no check */ #else #error invalid DUK_USE_ALIGN_BY #endif return error_count; } /* * 64-bit arithmetic * * There are some platforms/compilers where 64-bit types are available * but don't work correctly. Test for known cases. */ DUK_LOCAL duk_uint_t duk__selftest_64bit_arithmetic(void) { duk_uint_t error_count = 0; #if defined(DUK_USE_64BIT_OPS) volatile duk_int64_t i; volatile duk_double_t d; /* Catch a double-to-int64 cast issue encountered in practice. */ d = 2147483648.0; i = (duk_int64_t) d; if (i != DUK_I64_CONSTANT(0x80000000)) { DUK__FAILED("casting 2147483648.0 to duk_int64_t failed"); } #else /* nop */ #endif return error_count; } /* * Casting */ DUK_LOCAL duk_uint_t duk__selftest_cast_double_to_small_uint(void) { /* * https://github.com/svaarala/duktape/issues/127#issuecomment-77863473 */ duk_uint_t error_count = 0; duk_double_t d1, d2; duk_small_uint_t u; duk_double_t d1v, d2v; duk_small_uint_t uv; /* Test without volatiles */ d1 = 1.0; u = (duk_small_uint_t) d1; d2 = (duk_double_t) u; if (!(d1 == 1.0 && u == 1 && d2 == 1.0 && d1 == d2)) { DUK__FAILED("double to duk_small_uint_t cast failed"); } /* Same test with volatiles */ d1v = 1.0; uv = (duk_small_uint_t) d1v; d2v = (duk_double_t) uv; if (!(d1v == 1.0 && uv == 1 && d2v == 1.0 && d1v == d2v)) { DUK__FAILED("double to duk_small_uint_t cast failed"); } return error_count; } DUK_LOCAL duk_uint_t duk__selftest_cast_double_to_uint32(void) { /* * This test fails on an exotic ARM target; double-to-uint * cast is incorrectly clamped to -signed- int highest value. * * https://github.com/svaarala/duktape/issues/336 */ duk_uint_t error_count = 0; duk_double_t dv; duk_uint32_t uv; dv = 3735928559.0; /* 0xdeadbeef in decimal */ uv = (duk_uint32_t) dv; if (uv != 0xdeadbeefUL) { DUK__FAILED("double to duk_uint32_t cast failed"); } return error_count; } /* * Minimal test of user supplied allocation functions * * - Basic alloc + realloc + free cycle * * - Realloc to significantly larger size to (hopefully) trigger a * relocation and check that relocation copying works */ DUK_LOCAL duk_uint_t duk__selftest_alloc_funcs(duk_alloc_function alloc_func, duk_realloc_function realloc_func, duk_free_function free_func, void *udata) { duk_uint_t error_count = 0; void *ptr; void *new_ptr; duk_small_int_t i, j; unsigned char x; if (alloc_func == NULL || realloc_func == NULL || free_func == NULL) { return 0; } for (i = 1; i <= 256; i++) { ptr = alloc_func(udata, (duk_size_t) i); if (ptr == NULL) { DUK_D(DUK_DPRINT("alloc failed, ignore")); continue; /* alloc failed, ignore */ } for (j = 0; j < i; j++) { ((unsigned char *) ptr)[j] = (unsigned char) (0x80 + j); } new_ptr = realloc_func(udata, ptr, 1024); if (new_ptr == NULL) { DUK_D(DUK_DPRINT("realloc failed, ignore")); free_func(udata, ptr); continue; /* realloc failed, ignore */ } ptr = new_ptr; for (j = 0; j < i; j++) { x = ((unsigned char *) ptr)[j]; if (x != (unsigned char) (0x80 + j)) { DUK_D(DUK_DPRINT("byte at index %ld doesn't match after realloc: %02lx", (long) j, (unsigned long) x)); DUK__FAILED("byte compare after realloc"); break; } } free_func(udata, ptr); } return error_count; } /* * Self test main */ DUK_INTERNAL duk_uint_t duk_selftest_run_tests(duk_alloc_function alloc_func, duk_realloc_function realloc_func, duk_free_function free_func, void *udata) { duk_uint_t error_count = 0; DUK_D(DUK_DPRINT("self test starting")); error_count += duk__selftest_types(); error_count += duk__selftest_packed_tval(); error_count += duk__selftest_twos_complement(); error_count += duk__selftest_byte_order(); error_count += duk__selftest_bswap_macros(); error_count += duk__selftest_double_union_size(); error_count += duk__selftest_double_aliasing(); error_count += duk__selftest_double_zero_sign(); error_count += duk__selftest_double_rounding(); error_count += duk__selftest_fmod(); error_count += duk__selftest_struct_align(); error_count += duk__selftest_64bit_arithmetic(); error_count += duk__selftest_cast_double_to_small_uint(); error_count += duk__selftest_cast_double_to_uint32(); error_count += duk__selftest_alloc_funcs(alloc_func, realloc_func, free_func, udata); DUK_D(DUK_DPRINT("self test complete, total error count: %ld", (long) error_count)); return error_count; } #endif /* DUK_USE_SELF_TESTS */ /* automatic undefs */ #undef DUK__DBLUNION_CMP_FALSE #undef DUK__DBLUNION_CMP_TRUE #undef DUK__DOUBLE_COMPARE #undef DUK__DOUBLE_INIT #undef DUK__FAILED #undef DUK__U32_INIT /* #include duk_internal.h -> already included */ #if defined(DUK_USE_FASTINT) /* * Manually optimized double-to-fastint downgrade check. * * This check has a large impact on performance, especially for fastint * slow paths, so must be changed carefully. The code should probably be * optimized for the case where the result does not fit into a fastint, * to minimize the penalty for "slow path code" dealing with fractions etc. * * At least on one tested soft float ARM platform double-to-int64 coercion * is very slow (and sometimes produces incorrect results, see self tests). * This algorithm combines a fastint compatibility check and extracting the * integer value from an IEEE double for setting the tagged fastint. For * other platforms a more naive approach might be better. * * See doc/fastint.rst for details. */ DUK_INTERNAL DUK_ALWAYS_INLINE void duk_tval_set_number_chkfast_fast(duk_tval *tv, duk_double_t x) { duk_double_union du; duk_int64_t i; duk_small_int_t expt; duk_small_int_t shift; /* XXX: optimize for packed duk_tval directly? */ du.d = x; i = (duk_int64_t) DUK_DBLUNION_GET_INT64(&du); expt = (duk_small_int_t) ((i >> 52) & 0x07ff); shift = expt - 1023; if (shift >= 0 && shift <= 46) { /* exponents 1023 to 1069 */ duk_int64_t t; if (((DUK_I64_CONSTANT(0x000fffffffffffff) >> shift) & i) == 0) { t = i | DUK_I64_CONSTANT(0x0010000000000000); /* implicit leading one */ t = t & DUK_I64_CONSTANT(0x001fffffffffffff); t = t >> (52 - shift); if (i < 0) { t = -t; } DUK_TVAL_SET_FASTINT(tv, t); return; } } else if (shift == -1023) { /* exponent 0 */ if (i >= 0 && (i & DUK_I64_CONSTANT(0x000fffffffffffff)) == 0) { /* Note: reject negative zero. */ DUK_TVAL_SET_FASTINT(tv, (duk_int64_t) 0); return; } } else if (shift == 47) { /* exponent 1070 */ if (i < 0 && (i & DUK_I64_CONSTANT(0x000fffffffffffff)) == 0) { DUK_TVAL_SET_FASTINT(tv, (duk_int64_t) DUK_FASTINT_MIN); return; } } DUK_TVAL_SET_DOUBLE(tv, x); return; } DUK_INTERNAL DUK_NOINLINE void duk_tval_set_number_chkfast_slow(duk_tval *tv, duk_double_t x) { duk_tval_set_number_chkfast_fast(tv, x); } /* * Manually optimized number-to-double conversion */ #if defined(DUK_USE_FASTINT) && defined(DUK_USE_PACKED_TVAL) DUK_INTERNAL DUK_ALWAYS_INLINE duk_double_t duk_tval_get_number_packed(duk_tval *tv) { duk_double_union du; duk_uint64_t t; t = (duk_uint64_t) DUK_DBLUNION_GET_UINT64(tv); if ((t >> 48) != DUK_TAG_FASTINT) { return tv->d; } else if (t & DUK_U64_CONSTANT(0x0000800000000000)) { t = (duk_uint64_t) (-((duk_int64_t) t)); /* avoid unary minus on unsigned */ t = t & DUK_U64_CONSTANT(0x0000ffffffffffff); /* negative */ t |= DUK_U64_CONSTANT(0xc330000000000000); DUK_DBLUNION_SET_UINT64(&du, t); return du.d + 4503599627370496.0; /* 1 << 52 */ } else if (t != 0) { t &= DUK_U64_CONSTANT(0x0000ffffffffffff); /* positive */ t |= DUK_U64_CONSTANT(0x4330000000000000); DUK_DBLUNION_SET_UINT64(&du, t); return du.d - 4503599627370496.0; /* 1 << 52 */ } else { return 0.0; /* zero */ } } #endif /* DUK_USE_FASTINT && DUK_USE_PACKED_TVAL */ #if 0 /* unused */ #if defined(DUK_USE_FASTINT) && !defined(DUK_USE_PACKED_TVAL) DUK_INTERNAL DUK_ALWAYS_INLINE duk_double_t duk_tval_get_number_unpacked(duk_tval *tv) { duk_double_union du; duk_uint64_t t; DUK_ASSERT(tv->t == DUK_TAG_NUMBER || tv->t == DUK_TAG_FASTINT); if (tv->t == DUK_TAG_FASTINT) { if (tv->v.fi >= 0) { t = DUK_U64_CONSTANT(0x4330000000000000) | (duk_uint64_t) tv->v.fi; DUK_DBLUNION_SET_UINT64(&du, t); return du.d - 4503599627370496.0; /* 1 << 52 */ } else { t = DUK_U64_CONSTANT(0xc330000000000000) | (duk_uint64_t) (-tv->v.fi); DUK_DBLUNION_SET_UINT64(&du, t); return du.d + 4503599627370496.0; /* 1 << 52 */ } } else { return tv->v.d; } } #endif /* DUK_USE_FASTINT && DUK_USE_PACKED_TVAL */ #endif /* 0 */ #if defined(DUK_USE_FASTINT) && !defined(DUK_USE_PACKED_TVAL) DUK_INTERNAL DUK_ALWAYS_INLINE duk_double_t duk_tval_get_number_unpacked_fastint(duk_tval *tv) { duk_double_union du; duk_uint64_t t; DUK_ASSERT(tv->t == DUK_TAG_FASTINT); if (tv->v.fi >= 0) { t = DUK_U64_CONSTANT(0x4330000000000000) | (duk_uint64_t) tv->v.fi; DUK_DBLUNION_SET_UINT64(&du, t); return du.d - 4503599627370496.0; /* 1 << 52 */ } else { t = DUK_U64_CONSTANT(0xc330000000000000) | (duk_uint64_t) (-tv->v.fi); DUK_DBLUNION_SET_UINT64(&du, t); return du.d + 4503599627370496.0; /* 1 << 52 */ } } #endif /* DUK_USE_FASTINT && DUK_USE_PACKED_TVAL */ #endif /* DUK_USE_FASTINT */ /* * Assertion helpers. */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL void duk_tval_assert_valid(duk_tval *tv) { DUK_ASSERT(tv != NULL); } #endif /* * Unicode support tables automatically generated during build. */ /* #include duk_internal.h -> already included */ /* * Unicode tables containing ranges of Unicode characters in a * packed format. These tables are used to match non-ASCII * characters of complex productions by resorting to a linear * range-by-range comparison. This is very slow, but is expected * to be very rare in practical ECMAScript source code, and thus * compactness is most important. * * The tables are matched using uni_range_match() and the format * is described in tools/extract_chars.py. */ #if defined(DUK_USE_SOURCE_NONBMP) /* IdentifierStart production with ASCII excluded */ /* duk_unicode_ids_noa[] */ /* * Automatically generated by extract_chars.py, do not edit! */ const duk_uint8_t duk_unicode_ids_noa[1116] = { 249,176,176,80,111,7,47,15,47,254,11,197,191,0,72,2,15,115,66,19,50,7,2,34, 2,240,66,244,50,247,185,249,98,241,99,7,241,159,57,240,181,63,31,241,191, 21,18,245,50,15,1,24,27,35,15,2,2,240,239,15,244,156,15,10,241,26,21,6,240, 101,10,4,15,9,240,152,175,39,240,82,127,56,242,100,15,4,8,159,1,240,5,115, 19,240,98,98,4,52,15,2,14,18,47,0,27,9,85,19,240,98,98,18,18,31,17,50,15,5, 47,2,130,34,240,98,98,18,68,15,4,15,1,31,9,12,115,19,240,98,98,18,68,15,16, 18,47,1,15,3,2,84,34,52,18,2,20,20,36,191,8,15,38,114,34,240,114,240,4,15, 12,38,31,16,5,114,34,240,114,146,68,15,18,2,31,1,31,4,114,34,241,147,15,2, 6,41,47,10,86,240,36,240,130,130,3,111,44,242,2,29,111,44,18,2,66,240,130, 2,146,26,3,66,15,7,63,18,15,49,114,241,79,13,79,101,241,191,6,15,2,85,52,4, 24,37,205,15,3,241,98,6,3,241,178,255,224,63,35,54,32,35,63,25,35,63,17,35, 54,32,35,62,47,41,35,63,51,241,127,0,240,47,70,53,79,254,21,227,240,18,240, 166,243,180,168,194,63,0,240,47,0,240,47,0,194,47,1,242,79,21,5,15,53,244, 152,67,241,34,6,243,107,240,255,35,240,227,76,241,197,240,175,40,240,122, 242,95,68,15,79,241,255,3,111,41,240,238,27,241,207,12,241,79,27,43,241,67, 136,241,179,47,27,50,82,20,6,251,15,50,255,224,8,53,63,22,53,55,32,32,32, 47,15,63,37,38,32,66,38,67,53,92,98,38,246,96,224,240,44,245,112,80,57,32, 68,112,32,32,35,42,51,100,80,240,63,25,255,233,107,241,242,241,242,247,87, 52,29,241,98,6,3,242,136,15,2,240,122,98,98,98,98,98,98,98,111,66,15,254, 12,146,240,184,132,52,95,70,114,47,74,35,111,27,47,78,240,63,11,242,127,0, 255,224,244,255,240,0,138,143,60,255,240,4,14,47,2,255,227,127,243,95,30, 63,253,79,0,177,240,111,31,240,47,15,63,64,241,152,63,87,63,37,52,242,42, 34,35,47,7,240,255,36,240,15,34,243,5,64,33,207,12,191,7,240,191,13,143,31, 240,224,240,36,41,180,47,25,240,146,39,240,111,7,64,79,34,32,65,52,48,32, 240,162,58,130,213,53,53,166,38,47,27,43,159,99,240,255,255,0,26,150,223,7, 95,33,255,240,0,255,143,254,6,3,245,175,24,109,70,2,146,194,66,2,18,18,245, 207,19,255,224,93,240,79,48,63,38,241,171,246,100,47,119,241,111,10,127,10, 207,73,69,53,53,50,241,91,47,10,47,3,33,46,61,241,79,107,243,127,37,255, 223,13,79,33,242,31,16,239,14,111,22,191,14,63,20,87,36,241,207,142,240,79, 20,95,20,95,24,159,36,248,239,254,2,154,240,107,127,138,83,2,241,194,20,3, 240,123,240,122,240,255,51,240,50,27,240,107,240,175,56,242,135,31,50,15,1, 50,34,240,223,28,240,212,240,223,21,114,240,207,13,242,107,240,107,240,62, 240,47,96,243,159,41,242,62,242,62,241,79,254,13,15,13,176,159,6,248,207,7, 223,37,243,223,29,241,47,9,240,207,20,240,240,207,19,64,223,32,240,3,240, 112,32,241,95,2,47,9,244,102,32,35,46,41,143,31,241,135,49,63,6,38,33,36, 64,240,64,212,249,15,37,240,67,240,96,241,47,32,240,97,32,250,175,31,241, 179,241,111,32,240,96,242,223,27,224,243,159,11,253,127,28,246,111,48,241, 16,249,39,63,23,240,32,32,240,224,191,24,128,240,112,207,30,240,80,241,79, 41,255,152,47,21,240,48,242,63,14,246,38,33,47,22,240,112,240,181,33,47,16, 240,0,255,224,59,240,63,254,0,31,254,40,207,88,245,255,3,251,79,254,155,15, 254,50,31,254,236,95,254,19,159,255,0,16,173,255,225,43,143,15,246,63,14, 240,79,32,240,35,241,31,5,111,3,255,225,164,243,15,114,243,182,15,52,207, 50,18,15,14,255,240,0,110,169,255,225,229,255,240,1,64,31,254,1,31,35,47,3, 57,255,224,126,255,231,248,245,182,196,136,159,255,0,6,90,244,82,243,114, 19,3,19,50,178,2,98,243,18,51,114,98,240,194,50,66,4,98,255,224,70,63,9,47, 9,47,15,47,9,47,15,47,9,47,15,47,9,47,15,47,9,39,255,232,40,241,219,111,2, 15,254,6,95,28,255,228,8,251,95,45,243,72,15,254,58,131,47,11,33,32,48,41, 35,32,32,112,80,32,32,34,33,32,48,32,32,32,32,33,32,51,38,35,35,32,41,47,1, 98,36,47,1,255,240,0,3,143,255,0,149,201,241,191,254,242,124,252,227,255, 240,0,87,79,0,255,240,0,194,63,254,177,63,254,17,0, }; #else /* IdentifierStart production with ASCII and non-BMP excluded */ /* duk_unicode_ids_noabmp[] */ /* * Automatically generated by extract_chars.py, do not edit! */ const duk_uint8_t duk_unicode_ids_noabmp[625] = { 249,176,176,80,111,7,47,15,47,254,11,197,191,0,72,2,15,115,66,19,50,7,2,34, 2,240,66,244,50,247,185,249,98,241,99,7,241,159,57,240,181,63,31,241,191, 21,18,245,50,15,1,24,27,35,15,2,2,240,239,15,244,156,15,10,241,26,21,6,240, 101,10,4,15,9,240,152,175,39,240,82,127,56,242,100,15,4,8,159,1,240,5,115, 19,240,98,98,4,52,15,2,14,18,47,0,27,9,85,19,240,98,98,18,18,31,17,50,15,5, 47,2,130,34,240,98,98,18,68,15,4,15,1,31,9,12,115,19,240,98,98,18,68,15,16, 18,47,1,15,3,2,84,34,52,18,2,20,20,36,191,8,15,38,114,34,240,114,240,4,15, 12,38,31,16,5,114,34,240,114,146,68,15,18,2,31,1,31,4,114,34,241,147,15,2, 6,41,47,10,86,240,36,240,130,130,3,111,44,242,2,29,111,44,18,2,66,240,130, 2,146,26,3,66,15,7,63,18,15,49,114,241,79,13,79,101,241,191,6,15,2,85,52,4, 24,37,205,15,3,241,98,6,3,241,178,255,224,63,35,54,32,35,63,25,35,63,17,35, 54,32,35,62,47,41,35,63,51,241,127,0,240,47,70,53,79,254,21,227,240,18,240, 166,243,180,168,194,63,0,240,47,0,240,47,0,194,47,1,242,79,21,5,15,53,244, 152,67,241,34,6,243,107,240,255,35,240,227,76,241,197,240,175,40,240,122, 242,95,68,15,79,241,255,3,111,41,240,238,27,241,207,12,241,79,27,43,241,67, 136,241,179,47,27,50,82,20,6,251,15,50,255,224,8,53,63,22,53,55,32,32,32, 47,15,63,37,38,32,66,38,67,53,92,98,38,246,96,224,240,44,245,112,80,57,32, 68,112,32,32,35,42,51,100,80,240,63,25,255,233,107,241,242,241,242,247,87, 52,29,241,98,6,3,242,136,15,2,240,122,98,98,98,98,98,98,98,111,66,15,254, 12,146,240,184,132,52,95,70,114,47,74,35,111,27,47,78,240,63,11,242,127,0, 255,224,244,255,240,0,138,143,60,255,240,4,14,47,2,255,227,127,243,95,30, 63,253,79,0,177,240,111,31,240,47,15,63,64,241,152,63,87,63,37,52,242,42, 34,35,47,7,240,255,36,240,15,34,243,5,64,33,207,12,191,7,240,191,13,143,31, 240,224,240,36,41,180,47,25,240,146,39,240,111,7,64,79,34,32,65,52,48,32, 240,162,58,130,213,53,53,166,38,47,27,43,159,99,240,255,255,0,26,150,223,7, 95,33,255,240,0,255,143,254,6,3,245,175,24,109,70,2,146,194,66,2,18,18,245, 207,19,255,224,93,240,79,48,63,38,241,171,246,100,47,119,241,111,10,127,10, 207,73,69,53,53,50,0, }; #endif #if defined(DUK_USE_SOURCE_NONBMP) /* IdentifierStart production with Letter and ASCII excluded */ /* duk_unicode_ids_m_let_noa[] */ /* * Automatically generated by extract_chars.py, do not edit! */ const duk_uint8_t duk_unicode_ids_m_let_noa[42] = { 255,240,0,94,18,255,233,99,241,51,63,254,215,32,240,184,240,2,255,240,6,89, 249,255,240,4,148,79,37,255,224,192,9,15,120,79,255,0,15,30,245,240, }; #else /* IdentifierStart production with Letter, ASCII, and non-BMP excluded */ /* duk_unicode_ids_m_let_noabmp[] */ /* * Automatically generated by extract_chars.py, do not edit! */ const duk_uint8_t duk_unicode_ids_m_let_noabmp[24] = { 255,240,0,94,18,255,233,99,241,51,63,254,215,32,240,184,240,2,255,240,6,89, 249,0, }; #endif #if defined(DUK_USE_SOURCE_NONBMP) /* IdentifierPart production with IdentifierStart and ASCII excluded */ /* duk_unicode_idp_m_ids_noa[] */ /* * Automatically generated by extract_chars.py, do not edit! */ const duk_uint8_t duk_unicode_idp_m_ids_noa[576] = { 255,225,243,246,15,254,0,116,255,191,29,32,33,33,32,243,170,242,47,15,112, 245,118,53,49,35,57,240,144,241,15,11,244,218,240,25,241,56,160,240,163,40, 34,36,241,210,246,158,47,17,242,130,47,2,38,177,57,240,50,242,160,38,49,50, 160,177,57,240,0,50,242,160,36,81,50,64,240,107,64,194,242,160,39,34,34, 240,97,57,181,34,242,160,38,49,50,145,177,57,240,64,242,212,66,35,160,240, 9,240,36,242,182,34,35,129,193,57,240,50,242,160,38,34,35,129,193,57,240, 35,242,145,38,34,35,160,177,57,240,65,243,128,85,32,39,121,49,242,240,54, 215,41,244,144,56,197,57,243,1,121,192,32,32,81,242,63,4,33,106,47,20,160, 245,111,4,41,211,82,34,54,67,235,46,255,225,179,47,254,42,98,240,242,240, 241,241,1,243,47,16,160,57,241,50,57,245,209,241,64,246,139,91,185,247,41, 242,244,242,185,47,13,58,121,240,141,243,68,242,31,1,201,240,56,210,241,12, 57,241,237,242,47,4,153,121,246,130,47,5,80,112,50,251,143,42,36,255,225,0, 31,35,31,5,15,109,197,4,191,254,175,34,247,240,245,47,16,255,225,30,95,91, 31,255,0,100,121,159,55,5,159,18,31,66,31,254,0,64,64,80,240,148,244,161, 242,79,2,185,127,2,234,240,231,240,188,241,227,242,29,240,25,192,185,242, 29,208,145,57,241,50,242,64,34,49,97,32,241,180,97,253,231,33,57,255,240,3, 225,128,255,225,213,240,15,2,240,4,31,10,47,178,159,23,15,254,27,16,253,64, 248,116,255,224,25,159,254,68,178,33,99,241,162,80,249,113,255,225,49,57, 159,254,16,10,250,18,242,126,241,25,240,19,241,250,242,121,114,241,109,41, 97,241,224,210,242,45,147,73,244,75,112,249,43,105,115,242,145,38,49,50, 160,177,54,68,251,47,2,169,80,244,63,4,217,252,118,56,240,209,244,79,1,240, 25,244,60,153,244,94,89,254,78,249,121,253,150,54,64,240,233,241,166,35, 144,170,242,15,0,255,224,137,114,127,2,159,42,240,98,223,108,84,2,18,98,9, 159,34,66,18,73,159,254,3,211,255,240,3,165,217,247,132,242,214,240,185, 255,226,233,2,242,120,63,255,0,59,254,31,255,0,3,186,68,89,115,111,16,63, 134,47,254,71,223,34,255,224,244,242,117,242,41,15,0,15,8,66,239,254,68,70, 47,1,54,33,36,255,118,169,255,224,150,223,254,76,166,245,246,105,255,240, 192,105,175,224,0, }; #else /* IdentifierPart production with IdentifierStart, ASCII, and non-BMP excluded */ /* duk_unicode_idp_m_ids_noabmp[] */ /* * Automatically generated by extract_chars.py, do not edit! */ const duk_uint8_t duk_unicode_idp_m_ids_noabmp[358] = { 255,225,243,246,15,254,0,116,255,191,29,32,33,33,32,243,170,242,47,15,112, 245,118,53,49,35,57,240,144,241,15,11,244,218,240,25,241,56,160,240,163,40, 34,36,241,210,246,158,47,17,242,130,47,2,38,177,57,240,50,242,160,38,49,50, 160,177,57,240,0,50,242,160,36,81,50,64,240,107,64,194,242,160,39,34,34, 240,97,57,181,34,242,160,38,49,50,145,177,57,240,64,242,212,66,35,160,240, 9,240,36,242,182,34,35,129,193,57,240,50,242,160,38,34,35,129,193,57,240, 35,242,145,38,34,35,160,177,57,240,65,243,128,85,32,39,121,49,242,240,54, 215,41,244,144,56,197,57,243,1,121,192,32,32,81,242,63,4,33,106,47,20,160, 245,111,4,41,211,82,34,54,67,235,46,255,225,179,47,254,42,98,240,242,240, 241,241,1,243,47,16,160,57,241,50,57,245,209,241,64,246,139,91,185,247,41, 242,244,242,185,47,13,58,121,240,141,243,68,242,31,1,201,240,56,210,241,12, 57,241,237,242,47,4,153,121,246,130,47,5,80,112,50,251,143,42,36,255,225,0, 31,35,31,5,15,109,197,4,191,254,175,34,247,240,245,47,16,255,225,30,95,91, 31,255,0,100,121,159,55,5,159,18,31,66,31,254,0,64,64,80,240,148,244,161, 242,79,2,185,127,2,234,240,231,240,188,241,227,242,29,240,25,192,185,242, 29,208,145,57,241,50,242,64,34,49,97,32,241,180,97,253,231,33,57,255,240,3, 225,128,255,225,213,240,15,2,240,4,31,10,47,178,159,23,0, }; #endif /* * Case conversion tables generated using tools/extract_caseconv.py. */ /* duk_unicode_caseconv_uc[] */ /* duk_unicode_caseconv_lc[] */ /* * Automatically generated by extract_caseconv.py, do not edit! */ const duk_uint8_t duk_unicode_caseconv_uc[1411] = { 152,3,128,3,0,184,7,192,6,192,112,35,242,199,224,64,74,192,49,32,128,162, 128,108,65,1,189,129,254,131,3,173,3,136,6,7,98,7,34,68,15,12,14,140,72,30, 104,28,112,32,67,0,65,4,0,138,0,128,4,1,88,65,76,83,8,104,14,72,43,16,253, 28,189,6,39,240,39,224,24,114,12,16,132,16,248,0,248,64,129,241,1,241,128, 195,228,3,229,2,7,204,7,206,4,15,160,15,164,6,31,96,31,104,16,62,224,63, 116,8,125,200,127,32,32,251,176,254,208,33,247,129,255,128,67,239,67,253, 64,135,223,7,254,129,15,216,15,220,2,31,208,31,216,4,63,192,63,208,8,133, 192,133,128,129,38,129,37,177,162,195,2,192,5,229,160,2,20,9,170,220,4,232, 40,127,160,255,144,154,136,4,4,4,0,192,9,152,9,144,48,19,160,19,145,0,41, 96,41,69,192,94,128,94,65,128,193,128,193,2,1,161,1,160,6,3,104,3,102,8,7, 56,7,52,64,14,248,14,240,144,31,144,31,130,128,68,96,68,66,64,145,192,145, 130,129,184,129,184,2,3,217,3,216,24,8,194,8,192,68,18,44,18,40,216,38,16, 38,8,112,77,16,77,6,3,192,35,192,18,199,168,71,168,24,15,168,143,172,132, 44,104,44,103,6,89,2,89,0,200,179,176,179,172,21,50,13,50,1,122,104,26,104, 1,212,228,116,228,65,233,204,233,204,143,211,189,83,188,130,167,127,167, 126,11,79,35,79,32,10,158,94,158,88,85,61,173,61,160,97,192,107,64,107,1,0, 226,128,226,3,1,198,1,196,6,3,228,3,226,8,10,0,6,152,16,31,192,31,184,34, 199,50,199,32,65,128,196,0,195,130,1,185,1,184,4,4,205,79,84,8,0,192,143,0, 142,193,1,52,128,203,2,45,39,16,199,5,253,0,11,80,57,192,15,240,23,128,19, 16,4,144,23,240,5,48,24,0,36,48,25,32,25,16,25,80,31,96,25,144,25,128,25, 160,35,208,25,224,34,0,26,128,26,112,27,240,31,112,29,208,24,224,31,48,31, 16,37,2,198,240,37,18,198,208,37,34,199,0,37,48,24,16,37,64,24,96,37,144, 24,240,37,176,25,0,37,202,122,176,38,0,25,48,38,26,122,192,38,48,25,64,38, 90,120,208,38,128,25,112,38,178,198,32,38,202,122,208,39,18,198,224,39,32, 25,208,39,80,25,240,39,210,198,64,40,42,124,80,40,122,123,16,40,128,26,224, 40,144,36,64,40,192,36,80,41,32,27,112,41,218,123,32,41,234,123,0,52,80,57, 144,55,112,55,96,58,192,56,96,60,32,58,48,60,192,56,192,61,0,57,32,61,16, 57,128,61,80,58,96,61,96,58,0,61,112,60,240,63,0,57,160,63,16,58,16,63,32, 63,144,63,48,55,240,63,80,57,80,76,240,76,1,200,0,65,33,200,16,65,65,200, 32,65,225,200,80,66,33,200,96,66,161,200,112,70,33,200,138,100,161,215,154, 119,209,215,210,198,49,216,234,124,97,233,177,230,1,251,224,57,145,254,81, 254,194,20,226,19,34,24,66,24,50,198,18,198,2,198,80,35,162,198,96,35,226, 207,50,207,42,120,202,120,186,121,74,124,74,124,58,124,42,181,58,123,60, 192,27,240,2,152,2,152,10,76,5,120,0,156,3,225,0,37,1,134,1,200,96,115,32, 97,0,96,32,118,24,29,40,24,64,24,8,44,60,10,106,10,164,61,45,0,36,1,152, 143,75,192,10,128,97,3,211,16,2,184,24,80,244,204,0,178,6,20,61,53,0,32, 129,95,15,168,64,116,160,98,99,234,88,29,40,24,152,24,0,250,166,7,74,6,38, 6,2,62,173,129,210,129,137,129,161,15,192,67,225,0,115,35,240,48,248,72,28, 200,252,20,62,20,7,50,63,7,15,133,129,204,143,194,67,225,128,115,35,240, 176,248,104,28,200,252,52,62,28,7,50,63,15,15,135,129,204,143,196,67,225,0, 115,35,241,48,248,72,28,200,252,84,62,20,7,50,63,23,15,133,129,204,143,198, 67,225,128,115,35,241,176,248,104,28,200,252,116,62,28,7,50,63,31,15,135, 129,204,143,200,67,229,0,115,35,242,48,249,72,28,200,252,148,62,84,7,50,63, 39,15,149,129,204,143,202,67,229,128,115,35,242,176,249,104,28,200,252,180, 62,92,7,50,63,47,15,151,129,204,143,204,67,229,0,115,35,243,48,249,72,28, 200,252,212,62,84,7,50,63,55,15,149,129,204,143,206,67,229,128,115,35,243, 176,249,104,28,200,252,244,62,92,7,50,63,63,15,151,129,204,143,208,67,237, 0,115,35,244,48,251,72,28,200,253,20,62,212,7,50,63,71,15,181,129,204,143, 210,67,237,128,115,35,244,176,251,104,28,200,253,52,62,220,7,50,63,79,15, 183,129,204,143,212,67,237,0,115,35,245,48,251,72,28,200,253,84,62,212,7, 50,63,87,15,181,129,204,143,214,67,237,128,115,35,245,176,251,104,28,200, 253,116,62,220,7,50,63,95,15,183,129,204,143,217,67,247,64,115,35,246,112, 28,136,28,200,253,164,7,12,7,50,63,109,1,200,129,161,15,219,224,114,32,104, 64,115,35,247,144,28,136,28,200,254,20,63,148,7,50,63,135,1,203,129,204, 143,226,64,113,32,115,35,248,208,28,184,26,16,254,62,7,46,6,132,7,50,63, 153,1,203,129,204,143,233,96,115,32,97,0,96,3,250,120,28,200,24,64,24,8, 254,180,7,50,6,132,63,175,129,204,129,132,1,161,15,241,96,116,160,97,0,96, 3,252,120,29,40,24,64,24,8,255,36,7,66,6,38,63,205,1,210,129,161,15,243, 224,116,160,97,0,104,67,254,80,255,208,28,200,255,156,7,82,7,50,63,233,1, 199,129,204,143,251,64,117,32,104,67,254,248,29,72,26,16,28,200,255,228,7, 82,7,51,246,1,0,35,0,35,125,128,192,8,192,9,63,96,80,2,48,2,103,216,30,0, 140,0,140,0,147,246,9,128,35,0,35,0,38,125,130,192,10,96,10,159,96,208,2, 152,2,167,216,156,10,136,10,141,246,41,2,162,2,154,253,138,192,168,128,167, 127,98,208,42,112,42,55,216,188,10,136,10,122, }; const duk_uint8_t duk_unicode_caseconv_lc[706] = { 160,3,0,3,128,184,6,192,7,192,112,24,144,37,96,64,54,32,81,64,128,226,0, 235,65,129,199,1,230,130,3,145,3,177,34,7,70,7,134,36,15,244,13,236,24,32, 0,34,129,0,65,0,67,4,0,166,32,172,41,132,40,11,64,19,9,208,85,184,80,19, 240,19,248,12,57,32,33,160,172,114,244,67,244,24,248,64,248,0,129,241,129, 241,0,195,229,3,228,2,7,206,7,204,4,15,164,15,160,6,31,104,31,96,16,63,16, 63,0,32,126,96,126,64,64,253,64,253,0,129,251,129,251,0,67,247,67,238,0, 135,242,7,220,130,15,236,15,232,2,31,218,31,118,4,63,208,63,192,8,127,168, 125,232,16,255,192,251,192,33,255,161,247,192,68,44,4,46,4,9,45,137,52,13, 22,0,22,24,47,44,126,2,63,5,254,67,254,130,106,48,16,0,16,19,0,38,64,38,96, 192,78,64,78,132,0,165,0,165,151,1,121,1,122,6,3,4,3,6,8,6,128,6,132,24,13, 152,13,160,32,28,176,28,193,32,59,192,59,226,64,124,128,124,193,0,252,0, 252,148,2,34,2,35,18,4,140,4,142,20,13,192,13,196,16,30,192,30,200,192,70, 0,70,18,32,145,64,145,102,193,48,65,48,131,130,104,2,104,176,30,0,30,1,150, 61,64,61,66,192,125,100,125,68,33,99,57,99,64,50,200,2,200,22,69,157,101, 157,128,169,144,41,144,75,211,64,83,64,142,167,34,167,35,15,78,101,78,102, 126,157,230,157,232,21,59,245,59,248,90,121,10,121,16,84,242,212,242,226, 169,237,41,237,67,12,3,76,5,0,8,6,176,6,180,16,14,32,14,48,48,28,80,28,96, 64,126,224,127,0,139,28,139,28,193,6,3,14,3,16,8,6,224,6,228,21,61,80,19, 48,32,3,1,150,2,105,4,4,118,4,120,8,67,28,180,156,23,240,192,94,0,63,192, 96,64,148,192,97,128,149,0,99,128,119,64,99,192,150,64,100,0,150,192,100, 64,100,128,100,192,152,0,101,0,152,192,101,192,154,0,102,0,102,64,103,64, 156,128,103,192,157,64,105,192,106,0,107,128,162,0,109,192,164,128,124,64, 124,192,125,128,101,64,125,192,111,192,136,0,103,128,142,139,25,64,143,64, 102,128,143,139,25,128,144,192,96,0,145,0,162,64,145,64,163,0,221,128,221, 192,223,192,252,192,225,128,235,0,227,0,243,0,243,192,245,192,253,0,238,0, 254,64,252,129,48,1,51,199,167,128,55,199,239,7,236,199,243,7,240,199,251, 7,249,71,255,7,252,200,73,128,242,72,74,128,26,200,74,192,57,72,76,136,83, 136,96,200,97,11,24,11,24,75,24,128,154,203,24,199,95,75,25,0,159,75,27,64, 148,75,27,128,156,75,27,192,148,11,28,0,148,139,60,139,60,233,223,71,94, 105,226,233,227,41,227,64,153,105,234,192,151,41,235,0,152,105,235,64,155, 41,236,0,167,169,236,64,161,233,236,128,167,105,236,234,212,233,240,169, 240,233,241,41,229,41,241,64,160,169,241,135,99,128,128,152,64,13,32,96, 224, }; #if defined(DUK_USE_REGEXP_CANON_WORKAROUND) /* * Automatically generated by extract_caseconv.py, do not edit! */ const duk_uint16_t duk_unicode_re_canon_lookup[65536] = { 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27, 28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52, 53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77, 78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,65,66,67,68,69,70, 71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,123,124,125, 126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161, 162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179, 180,924,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197, 198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215, 216,217,218,219,220,221,222,223,192,193,194,195,196,197,198,199,200,201, 202,203,204,205,206,207,208,209,210,211,212,213,214,247,216,217,218,219, 220,221,222,376,256,256,258,258,260,260,262,262,264,264,266,266,268,268, 270,270,272,272,274,274,276,276,278,278,280,280,282,282,284,284,286,286, 288,288,290,290,292,292,294,294,296,296,298,298,300,300,302,302,304,305, 306,306,308,308,310,310,312,313,313,315,315,317,317,319,319,321,321,323, 323,325,325,327,327,329,330,330,332,332,334,334,336,336,338,338,340,340, 342,342,344,344,346,346,348,348,350,350,352,352,354,354,356,356,358,358, 360,360,362,362,364,364,366,366,368,368,370,370,372,372,374,374,376,377, 377,379,379,381,381,383,579,385,386,386,388,388,390,391,391,393,394,395, 395,397,398,399,400,401,401,403,404,502,406,407,408,408,573,411,412,413, 544,415,416,416,418,418,420,420,422,423,423,425,426,427,428,428,430,431, 431,433,434,435,435,437,437,439,440,440,442,443,444,444,446,503,448,449, 450,451,452,452,452,455,455,455,458,458,458,461,461,463,463,465,465,467, 467,469,469,471,471,473,473,475,475,398,478,478,480,480,482,482,484,484, 486,486,488,488,490,490,492,492,494,494,496,497,497,497,500,500,502,503, 504,504,506,506,508,508,510,510,512,512,514,514,516,516,518,518,520,520, 522,522,524,524,526,526,528,528,530,530,532,532,534,534,536,536,538,538, 540,540,542,542,544,545,546,546,548,548,550,550,552,552,554,554,556,556, 558,558,560,560,562,562,564,565,566,567,568,569,570,571,571,573,574,11390, 11391,577,577,579,580,581,582,582,584,584,586,586,588,588,590,590,11375, 11373,11376,385,390,597,393,394,600,399,602,400,42923L,605,606,607,403, 42924L,610,404,612,42893L,42922L,615,407,406,42926L,11362,42925L,621,622, 412,624,11374,413,627,628,415,630,631,632,633,634,635,636,11364,638,639, 422,641,42949L,425,644,645,646,42929L,430,580,433,434,581,653,654,655,656, 657,439,659,660,661,662,663,664,665,666,667,668,42930L,42928L,671,672,673, 674,675,676,677,678,679,680,681,682,683,684,685,686,687,688,689,690,691, 692,693,694,695,696,697,698,699,700,701,702,703,704,705,706,707,708,709, 710,711,712,713,714,715,716,717,718,719,720,721,722,723,724,725,726,727, 728,729,730,731,732,733,734,735,736,737,738,739,740,741,742,743,744,745, 746,747,748,749,750,751,752,753,754,755,756,757,758,759,760,761,762,763, 764,765,766,767,768,769,770,771,772,773,774,775,776,777,778,779,780,781, 782,783,784,785,786,787,788,789,790,791,792,793,794,795,796,797,798,799, 800,801,802,803,804,805,806,807,808,809,810,811,812,813,814,815,816,817, 818,819,820,821,822,823,824,825,826,827,828,829,830,831,832,833,834,835, 836,921,838,839,840,841,842,843,844,845,846,847,848,849,850,851,852,853, 854,855,856,857,858,859,860,861,862,863,864,865,866,867,868,869,870,871, 872,873,874,875,876,877,878,879,880,880,882,882,884,885,886,886,888,889, 890,1021,1022,1023,894,895,896,897,898,899,900,901,902,903,904,905,906,907, 908,909,910,911,912,913,914,915,916,917,918,919,920,921,922,923,924,925, 926,927,928,929,930,931,932,933,934,935,936,937,938,939,902,904,905,906, 944,913,914,915,916,917,918,919,920,921,922,923,924,925,926,927,928,929, 931,931,932,933,934,935,936,937,938,939,908,910,911,975,914,920,978,979, 980,934,928,975,984,984,986,986,988,988,990,990,992,992,994,994,996,996, 998,998,1000,1000,1002,1002,1004,1004,1006,1006,922,929,1017,895,1012,917, 1014,1015,1015,1017,1018,1018,1020,1021,1022,1023,1024,1025,1026,1027,1028, 1029,1030,1031,1032,1033,1034,1035,1036,1037,1038,1039,1040,1041,1042,1043, 1044,1045,1046,1047,1048,1049,1050,1051,1052,1053,1054,1055,1056,1057,1058, 1059,1060,1061,1062,1063,1064,1065,1066,1067,1068,1069,1070,1071,1040,1041, 1042,1043,1044,1045,1046,1047,1048,1049,1050,1051,1052,1053,1054,1055,1056, 1057,1058,1059,1060,1061,1062,1063,1064,1065,1066,1067,1068,1069,1070,1071, 1024,1025,1026,1027,1028,1029,1030,1031,1032,1033,1034,1035,1036,1037,1038, 1039,1120,1120,1122,1122,1124,1124,1126,1126,1128,1128,1130,1130,1132,1132, 1134,1134,1136,1136,1138,1138,1140,1140,1142,1142,1144,1144,1146,1146,1148, 1148,1150,1150,1152,1152,1154,1155,1156,1157,1158,1159,1160,1161,1162,1162, 1164,1164,1166,1166,1168,1168,1170,1170,1172,1172,1174,1174,1176,1176,1178, 1178,1180,1180,1182,1182,1184,1184,1186,1186,1188,1188,1190,1190,1192,1192, 1194,1194,1196,1196,1198,1198,1200,1200,1202,1202,1204,1204,1206,1206,1208, 1208,1210,1210,1212,1212,1214,1214,1216,1217,1217,1219,1219,1221,1221,1223, 1223,1225,1225,1227,1227,1229,1229,1216,1232,1232,1234,1234,1236,1236,1238, 1238,1240,1240,1242,1242,1244,1244,1246,1246,1248,1248,1250,1250,1252,1252, 1254,1254,1256,1256,1258,1258,1260,1260,1262,1262,1264,1264,1266,1266,1268, 1268,1270,1270,1272,1272,1274,1274,1276,1276,1278,1278,1280,1280,1282,1282, 1284,1284,1286,1286,1288,1288,1290,1290,1292,1292,1294,1294,1296,1296,1298, 1298,1300,1300,1302,1302,1304,1304,1306,1306,1308,1308,1310,1310,1312,1312, 1314,1314,1316,1316,1318,1318,1320,1320,1322,1322,1324,1324,1326,1326,1328, 1329,1330,1331,1332,1333,1334,1335,1336,1337,1338,1339,1340,1341,1342,1343, 1344,1345,1346,1347,1348,1349,1350,1351,1352,1353,1354,1355,1356,1357,1358, 1359,1360,1361,1362,1363,1364,1365,1366,1367,1368,1369,1370,1371,1372,1373, 1374,1375,1376,1329,1330,1331,1332,1333,1334,1335,1336,1337,1338,1339,1340, 1341,1342,1343,1344,1345,1346,1347,1348,1349,1350,1351,1352,1353,1354,1355, 1356,1357,1358,1359,1360,1361,1362,1363,1364,1365,1366,1415,1416,1417,1418, 1419,1420,1421,1422,1423,1424,1425,1426,1427,1428,1429,1430,1431,1432,1433, 1434,1435,1436,1437,1438,1439,1440,1441,1442,1443,1444,1445,1446,1447,1448, 1449,1450,1451,1452,1453,1454,1455,1456,1457,1458,1459,1460,1461,1462,1463, 1464,1465,1466,1467,1468,1469,1470,1471,1472,1473,1474,1475,1476,1477,1478, 1479,1480,1481,1482,1483,1484,1485,1486,1487,1488,1489,1490,1491,1492,1493, 1494,1495,1496,1497,1498,1499,1500,1501,1502,1503,1504,1505,1506,1507,1508, 1509,1510,1511,1512,1513,1514,1515,1516,1517,1518,1519,1520,1521,1522,1523, 1524,1525,1526,1527,1528,1529,1530,1531,1532,1533,1534,1535,1536,1537,1538, 1539,1540,1541,1542,1543,1544,1545,1546,1547,1548,1549,1550,1551,1552,1553, 1554,1555,1556,1557,1558,1559,1560,1561,1562,1563,1564,1565,1566,1567,1568, 1569,1570,1571,1572,1573,1574,1575,1576,1577,1578,1579,1580,1581,1582,1583, 1584,1585,1586,1587,1588,1589,1590,1591,1592,1593,1594,1595,1596,1597,1598, 1599,1600,1601,1602,1603,1604,1605,1606,1607,1608,1609,1610,1611,1612,1613, 1614,1615,1616,1617,1618,1619,1620,1621,1622,1623,1624,1625,1626,1627,1628, 1629,1630,1631,1632,1633,1634,1635,1636,1637,1638,1639,1640,1641,1642,1643, 1644,1645,1646,1647,1648,1649,1650,1651,1652,1653,1654,1655,1656,1657,1658, 1659,1660,1661,1662,1663,1664,1665,1666,1667,1668,1669,1670,1671,1672,1673, 1674,1675,1676,1677,1678,1679,1680,1681,1682,1683,1684,1685,1686,1687,1688, 1689,1690,1691,1692,1693,1694,1695,1696,1697,1698,1699,1700,1701,1702,1703, 1704,1705,1706,1707,1708,1709,1710,1711,1712,1713,1714,1715,1716,1717,1718, 1719,1720,1721,1722,1723,1724,1725,1726,1727,1728,1729,1730,1731,1732,1733, 1734,1735,1736,1737,1738,1739,1740,1741,1742,1743,1744,1745,1746,1747,1748, 1749,1750,1751,1752,1753,1754,1755,1756,1757,1758,1759,1760,1761,1762,1763, 1764,1765,1766,1767,1768,1769,1770,1771,1772,1773,1774,1775,1776,1777,1778, 1779,1780,1781,1782,1783,1784,1785,1786,1787,1788,1789,1790,1791,1792,1793, 1794,1795,1796,1797,1798,1799,1800,1801,1802,1803,1804,1805,1806,1807,1808, 1809,1810,1811,1812,1813,1814,1815,1816,1817,1818,1819,1820,1821,1822,1823, 1824,1825,1826,1827,1828,1829,1830,1831,1832,1833,1834,1835,1836,1837,1838, 1839,1840,1841,1842,1843,1844,1845,1846,1847,1848,1849,1850,1851,1852,1853, 1854,1855,1856,1857,1858,1859,1860,1861,1862,1863,1864,1865,1866,1867,1868, 1869,1870,1871,1872,1873,1874,1875,1876,1877,1878,1879,1880,1881,1882,1883, 1884,1885,1886,1887,1888,1889,1890,1891,1892,1893,1894,1895,1896,1897,1898, 1899,1900,1901,1902,1903,1904,1905,1906,1907,1908,1909,1910,1911,1912,1913, 1914,1915,1916,1917,1918,1919,1920,1921,1922,1923,1924,1925,1926,1927,1928, 1929,1930,1931,1932,1933,1934,1935,1936,1937,1938,1939,1940,1941,1942,1943, 1944,1945,1946,1947,1948,1949,1950,1951,1952,1953,1954,1955,1956,1957,1958, 1959,1960,1961,1962,1963,1964,1965,1966,1967,1968,1969,1970,1971,1972,1973, 1974,1975,1976,1977,1978,1979,1980,1981,1982,1983,1984,1985,1986,1987,1988, 1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003, 2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018, 2019,2020,2021,2022,2023,2024,2025,2026,2027,2028,2029,2030,2031,2032,2033, 2034,2035,2036,2037,2038,2039,2040,2041,2042,2043,2044,2045,2046,2047,2048, 2049,2050,2051,2052,2053,2054,2055,2056,2057,2058,2059,2060,2061,2062,2063, 2064,2065,2066,2067,2068,2069,2070,2071,2072,2073,2074,2075,2076,2077,2078, 2079,2080,2081,2082,2083,2084,2085,2086,2087,2088,2089,2090,2091,2092,2093, 2094,2095,2096,2097,2098,2099,2100,2101,2102,2103,2104,2105,2106,2107,2108, 2109,2110,2111,2112,2113,2114,2115,2116,2117,2118,2119,2120,2121,2122,2123, 2124,2125,2126,2127,2128,2129,2130,2131,2132,2133,2134,2135,2136,2137,2138, 2139,2140,2141,2142,2143,2144,2145,2146,2147,2148,2149,2150,2151,2152,2153, 2154,2155,2156,2157,2158,2159,2160,2161,2162,2163,2164,2165,2166,2167,2168, 2169,2170,2171,2172,2173,2174,2175,2176,2177,2178,2179,2180,2181,2182,2183, 2184,2185,2186,2187,2188,2189,2190,2191,2192,2193,2194,2195,2196,2197,2198, 2199,2200,2201,2202,2203,2204,2205,2206,2207,2208,2209,2210,2211,2212,2213, 2214,2215,2216,2217,2218,2219,2220,2221,2222,2223,2224,2225,2226,2227,2228, 2229,2230,2231,2232,2233,2234,2235,2236,2237,2238,2239,2240,2241,2242,2243, 2244,2245,2246,2247,2248,2249,2250,2251,2252,2253,2254,2255,2256,2257,2258, 2259,2260,2261,2262,2263,2264,2265,2266,2267,2268,2269,2270,2271,2272,2273, 2274,2275,2276,2277,2278,2279,2280,2281,2282,2283,2284,2285,2286,2287,2288, 2289,2290,2291,2292,2293,2294,2295,2296,2297,2298,2299,2300,2301,2302,2303, 2304,2305,2306,2307,2308,2309,2310,2311,2312,2313,2314,2315,2316,2317,2318, 2319,2320,2321,2322,2323,2324,2325,2326,2327,2328,2329,2330,2331,2332,2333, 2334,2335,2336,2337,2338,2339,2340,2341,2342,2343,2344,2345,2346,2347,2348, 2349,2350,2351,2352,2353,2354,2355,2356,2357,2358,2359,2360,2361,2362,2363, 2364,2365,2366,2367,2368,2369,2370,2371,2372,2373,2374,2375,2376,2377,2378, 2379,2380,2381,2382,2383,2384,2385,2386,2387,2388,2389,2390,2391,2392,2393, 2394,2395,2396,2397,2398,2399,2400,2401,2402,2403,2404,2405,2406,2407,2408, 2409,2410,2411,2412,2413,2414,2415,2416,2417,2418,2419,2420,2421,2422,2423, 2424,2425,2426,2427,2428,2429,2430,2431,2432,2433,2434,2435,2436,2437,2438, 2439,2440,2441,2442,2443,2444,2445,2446,2447,2448,2449,2450,2451,2452,2453, 2454,2455,2456,2457,2458,2459,2460,2461,2462,2463,2464,2465,2466,2467,2468, 2469,2470,2471,2472,2473,2474,2475,2476,2477,2478,2479,2480,2481,2482,2483, 2484,2485,2486,2487,2488,2489,2490,2491,2492,2493,2494,2495,2496,2497,2498, 2499,2500,2501,2502,2503,2504,2505,2506,2507,2508,2509,2510,2511,2512,2513, 2514,2515,2516,2517,2518,2519,2520,2521,2522,2523,2524,2525,2526,2527,2528, 2529,2530,2531,2532,2533,2534,2535,2536,2537,2538,2539,2540,2541,2542,2543, 2544,2545,2546,2547,2548,2549,2550,2551,2552,2553,2554,2555,2556,2557,2558, 2559,2560,2561,2562,2563,2564,2565,2566,2567,2568,2569,2570,2571,2572,2573, 2574,2575,2576,2577,2578,2579,2580,2581,2582,2583,2584,2585,2586,2587,2588, 2589,2590,2591,2592,2593,2594,2595,2596,2597,2598,2599,2600,2601,2602,2603, 2604,2605,2606,2607,2608,2609,2610,2611,2612,2613,2614,2615,2616,2617,2618, 2619,2620,2621,2622,2623,2624,2625,2626,2627,2628,2629,2630,2631,2632,2633, 2634,2635,2636,2637,2638,2639,2640,2641,2642,2643,2644,2645,2646,2647,2648, 2649,2650,2651,2652,2653,2654,2655,2656,2657,2658,2659,2660,2661,2662,2663, 2664,2665,2666,2667,2668,2669,2670,2671,2672,2673,2674,2675,2676,2677,2678, 2679,2680,2681,2682,2683,2684,2685,2686,2687,2688,2689,2690,2691,2692,2693, 2694,2695,2696,2697,2698,2699,2700,2701,2702,2703,2704,2705,2706,2707,2708, 2709,2710,2711,2712,2713,2714,2715,2716,2717,2718,2719,2720,2721,2722,2723, 2724,2725,2726,2727,2728,2729,2730,2731,2732,2733,2734,2735,2736,2737,2738, 2739,2740,2741,2742,2743,2744,2745,2746,2747,2748,2749,2750,2751,2752,2753, 2754,2755,2756,2757,2758,2759,2760,2761,2762,2763,2764,2765,2766,2767,2768, 2769,2770,2771,2772,2773,2774,2775,2776,2777,2778,2779,2780,2781,2782,2783, 2784,2785,2786,2787,2788,2789,2790,2791,2792,2793,2794,2795,2796,2797,2798, 2799,2800,2801,2802,2803,2804,2805,2806,2807,2808,2809,2810,2811,2812,2813, 2814,2815,2816,2817,2818,2819,2820,2821,2822,2823,2824,2825,2826,2827,2828, 2829,2830,2831,2832,2833,2834,2835,2836,2837,2838,2839,2840,2841,2842,2843, 2844,2845,2846,2847,2848,2849,2850,2851,2852,2853,2854,2855,2856,2857,2858, 2859,2860,2861,2862,2863,2864,2865,2866,2867,2868,2869,2870,2871,2872,2873, 2874,2875,2876,2877,2878,2879,2880,2881,2882,2883,2884,2885,2886,2887,2888, 2889,2890,2891,2892,2893,2894,2895,2896,2897,2898,2899,2900,2901,2902,2903, 2904,2905,2906,2907,2908,2909,2910,2911,2912,2913,2914,2915,2916,2917,2918, 2919,2920,2921,2922,2923,2924,2925,2926,2927,2928,2929,2930,2931,2932,2933, 2934,2935,2936,2937,2938,2939,2940,2941,2942,2943,2944,2945,2946,2947,2948, 2949,2950,2951,2952,2953,2954,2955,2956,2957,2958,2959,2960,2961,2962,2963, 2964,2965,2966,2967,2968,2969,2970,2971,2972,2973,2974,2975,2976,2977,2978, 2979,2980,2981,2982,2983,2984,2985,2986,2987,2988,2989,2990,2991,2992,2993, 2994,2995,2996,2997,2998,2999,3000,3001,3002,3003,3004,3005,3006,3007,3008, 3009,3010,3011,3012,3013,3014,3015,3016,3017,3018,3019,3020,3021,3022,3023, 3024,3025,3026,3027,3028,3029,3030,3031,3032,3033,3034,3035,3036,3037,3038, 3039,3040,3041,3042,3043,3044,3045,3046,3047,3048,3049,3050,3051,3052,3053, 3054,3055,3056,3057,3058,3059,3060,3061,3062,3063,3064,3065,3066,3067,3068, 3069,3070,3071,3072,3073,3074,3075,3076,3077,3078,3079,3080,3081,3082,3083, 3084,3085,3086,3087,3088,3089,3090,3091,3092,3093,3094,3095,3096,3097,3098, 3099,3100,3101,3102,3103,3104,3105,3106,3107,3108,3109,3110,3111,3112,3113, 3114,3115,3116,3117,3118,3119,3120,3121,3122,3123,3124,3125,3126,3127,3128, 3129,3130,3131,3132,3133,3134,3135,3136,3137,3138,3139,3140,3141,3142,3143, 3144,3145,3146,3147,3148,3149,3150,3151,3152,3153,3154,3155,3156,3157,3158, 3159,3160,3161,3162,3163,3164,3165,3166,3167,3168,3169,3170,3171,3172,3173, 3174,3175,3176,3177,3178,3179,3180,3181,3182,3183,3184,3185,3186,3187,3188, 3189,3190,3191,3192,3193,3194,3195,3196,3197,3198,3199,3200,3201,3202,3203, 3204,3205,3206,3207,3208,3209,3210,3211,3212,3213,3214,3215,3216,3217,3218, 3219,3220,3221,3222,3223,3224,3225,3226,3227,3228,3229,3230,3231,3232,3233, 3234,3235,3236,3237,3238,3239,3240,3241,3242,3243,3244,3245,3246,3247,3248, 3249,3250,3251,3252,3253,3254,3255,3256,3257,3258,3259,3260,3261,3262,3263, 3264,3265,3266,3267,3268,3269,3270,3271,3272,3273,3274,3275,3276,3277,3278, 3279,3280,3281,3282,3283,3284,3285,3286,3287,3288,3289,3290,3291,3292,3293, 3294,3295,3296,3297,3298,3299,3300,3301,3302,3303,3304,3305,3306,3307,3308, 3309,3310,3311,3312,3313,3314,3315,3316,3317,3318,3319,3320,3321,3322,3323, 3324,3325,3326,3327,3328,3329,3330,3331,3332,3333,3334,3335,3336,3337,3338, 3339,3340,3341,3342,3343,3344,3345,3346,3347,3348,3349,3350,3351,3352,3353, 3354,3355,3356,3357,3358,3359,3360,3361,3362,3363,3364,3365,3366,3367,3368, 3369,3370,3371,3372,3373,3374,3375,3376,3377,3378,3379,3380,3381,3382,3383, 3384,3385,3386,3387,3388,3389,3390,3391,3392,3393,3394,3395,3396,3397,3398, 3399,3400,3401,3402,3403,3404,3405,3406,3407,3408,3409,3410,3411,3412,3413, 3414,3415,3416,3417,3418,3419,3420,3421,3422,3423,3424,3425,3426,3427,3428, 3429,3430,3431,3432,3433,3434,3435,3436,3437,3438,3439,3440,3441,3442,3443, 3444,3445,3446,3447,3448,3449,3450,3451,3452,3453,3454,3455,3456,3457,3458, 3459,3460,3461,3462,3463,3464,3465,3466,3467,3468,3469,3470,3471,3472,3473, 3474,3475,3476,3477,3478,3479,3480,3481,3482,3483,3484,3485,3486,3487,3488, 3489,3490,3491,3492,3493,3494,3495,3496,3497,3498,3499,3500,3501,3502,3503, 3504,3505,3506,3507,3508,3509,3510,3511,3512,3513,3514,3515,3516,3517,3518, 3519,3520,3521,3522,3523,3524,3525,3526,3527,3528,3529,3530,3531,3532,3533, 3534,3535,3536,3537,3538,3539,3540,3541,3542,3543,3544,3545,3546,3547,3548, 3549,3550,3551,3552,3553,3554,3555,3556,3557,3558,3559,3560,3561,3562,3563, 3564,3565,3566,3567,3568,3569,3570,3571,3572,3573,3574,3575,3576,3577,3578, 3579,3580,3581,3582,3583,3584,3585,3586,3587,3588,3589,3590,3591,3592,3593, 3594,3595,3596,3597,3598,3599,3600,3601,3602,3603,3604,3605,3606,3607,3608, 3609,3610,3611,3612,3613,3614,3615,3616,3617,3618,3619,3620,3621,3622,3623, 3624,3625,3626,3627,3628,3629,3630,3631,3632,3633,3634,3635,3636,3637,3638, 3639,3640,3641,3642,3643,3644,3645,3646,3647,3648,3649,3650,3651,3652,3653, 3654,3655,3656,3657,3658,3659,3660,3661,3662,3663,3664,3665,3666,3667,3668, 3669,3670,3671,3672,3673,3674,3675,3676,3677,3678,3679,3680,3681,3682,3683, 3684,3685,3686,3687,3688,3689,3690,3691,3692,3693,3694,3695,3696,3697,3698, 3699,3700,3701,3702,3703,3704,3705,3706,3707,3708,3709,3710,3711,3712,3713, 3714,3715,3716,3717,3718,3719,3720,3721,3722,3723,3724,3725,3726,3727,3728, 3729,3730,3731,3732,3733,3734,3735,3736,3737,3738,3739,3740,3741,3742,3743, 3744,3745,3746,3747,3748,3749,3750,3751,3752,3753,3754,3755,3756,3757,3758, 3759,3760,3761,3762,3763,3764,3765,3766,3767,3768,3769,3770,3771,3772,3773, 3774,3775,3776,3777,3778,3779,3780,3781,3782,3783,3784,3785,3786,3787,3788, 3789,3790,3791,3792,3793,3794,3795,3796,3797,3798,3799,3800,3801,3802,3803, 3804,3805,3806,3807,3808,3809,3810,3811,3812,3813,3814,3815,3816,3817,3818, 3819,3820,3821,3822,3823,3824,3825,3826,3827,3828,3829,3830,3831,3832,3833, 3834,3835,3836,3837,3838,3839,3840,3841,3842,3843,3844,3845,3846,3847,3848, 3849,3850,3851,3852,3853,3854,3855,3856,3857,3858,3859,3860,3861,3862,3863, 3864,3865,3866,3867,3868,3869,3870,3871,3872,3873,3874,3875,3876,3877,3878, 3879,3880,3881,3882,3883,3884,3885,3886,3887,3888,3889,3890,3891,3892,3893, 3894,3895,3896,3897,3898,3899,3900,3901,3902,3903,3904,3905,3906,3907,3908, 3909,3910,3911,3912,3913,3914,3915,3916,3917,3918,3919,3920,3921,3922,3923, 3924,3925,3926,3927,3928,3929,3930,3931,3932,3933,3934,3935,3936,3937,3938, 3939,3940,3941,3942,3943,3944,3945,3946,3947,3948,3949,3950,3951,3952,3953, 3954,3955,3956,3957,3958,3959,3960,3961,3962,3963,3964,3965,3966,3967,3968, 3969,3970,3971,3972,3973,3974,3975,3976,3977,3978,3979,3980,3981,3982,3983, 3984,3985,3986,3987,3988,3989,3990,3991,3992,3993,3994,3995,3996,3997,3998, 3999,4000,4001,4002,4003,4004,4005,4006,4007,4008,4009,4010,4011,4012,4013, 4014,4015,4016,4017,4018,4019,4020,4021,4022,4023,4024,4025,4026,4027,4028, 4029,4030,4031,4032,4033,4034,4035,4036,4037,4038,4039,4040,4041,4042,4043, 4044,4045,4046,4047,4048,4049,4050,4051,4052,4053,4054,4055,4056,4057,4058, 4059,4060,4061,4062,4063,4064,4065,4066,4067,4068,4069,4070,4071,4072,4073, 4074,4075,4076,4077,4078,4079,4080,4081,4082,4083,4084,4085,4086,4087,4088, 4089,4090,4091,4092,4093,4094,4095,4096,4097,4098,4099,4100,4101,4102,4103, 4104,4105,4106,4107,4108,4109,4110,4111,4112,4113,4114,4115,4116,4117,4118, 4119,4120,4121,4122,4123,4124,4125,4126,4127,4128,4129,4130,4131,4132,4133, 4134,4135,4136,4137,4138,4139,4140,4141,4142,4143,4144,4145,4146,4147,4148, 4149,4150,4151,4152,4153,4154,4155,4156,4157,4158,4159,4160,4161,4162,4163, 4164,4165,4166,4167,4168,4169,4170,4171,4172,4173,4174,4175,4176,4177,4178, 4179,4180,4181,4182,4183,4184,4185,4186,4187,4188,4189,4190,4191,4192,4193, 4194,4195,4196,4197,4198,4199,4200,4201,4202,4203,4204,4205,4206,4207,4208, 4209,4210,4211,4212,4213,4214,4215,4216,4217,4218,4219,4220,4221,4222,4223, 4224,4225,4226,4227,4228,4229,4230,4231,4232,4233,4234,4235,4236,4237,4238, 4239,4240,4241,4242,4243,4244,4245,4246,4247,4248,4249,4250,4251,4252,4253, 4254,4255,4256,4257,4258,4259,4260,4261,4262,4263,4264,4265,4266,4267,4268, 4269,4270,4271,4272,4273,4274,4275,4276,4277,4278,4279,4280,4281,4282,4283, 4284,4285,4286,4287,4288,4289,4290,4291,4292,4293,4294,4295,4296,4297,4298, 4299,4300,4301,4302,4303,7312,7313,7314,7315,7316,7317,7318,7319,7320,7321, 7322,7323,7324,7325,7326,7327,7328,7329,7330,7331,7332,7333,7334,7335,7336, 7337,7338,7339,7340,7341,7342,7343,7344,7345,7346,7347,7348,7349,7350,7351, 7352,7353,7354,4347,4348,7357,7358,7359,4352,4353,4354,4355,4356,4357,4358, 4359,4360,4361,4362,4363,4364,4365,4366,4367,4368,4369,4370,4371,4372,4373, 4374,4375,4376,4377,4378,4379,4380,4381,4382,4383,4384,4385,4386,4387,4388, 4389,4390,4391,4392,4393,4394,4395,4396,4397,4398,4399,4400,4401,4402,4403, 4404,4405,4406,4407,4408,4409,4410,4411,4412,4413,4414,4415,4416,4417,4418, 4419,4420,4421,4422,4423,4424,4425,4426,4427,4428,4429,4430,4431,4432,4433, 4434,4435,4436,4437,4438,4439,4440,4441,4442,4443,4444,4445,4446,4447,4448, 4449,4450,4451,4452,4453,4454,4455,4456,4457,4458,4459,4460,4461,4462,4463, 4464,4465,4466,4467,4468,4469,4470,4471,4472,4473,4474,4475,4476,4477,4478, 4479,4480,4481,4482,4483,4484,4485,4486,4487,4488,4489,4490,4491,4492,4493, 4494,4495,4496,4497,4498,4499,4500,4501,4502,4503,4504,4505,4506,4507,4508, 4509,4510,4511,4512,4513,4514,4515,4516,4517,4518,4519,4520,4521,4522,4523, 4524,4525,4526,4527,4528,4529,4530,4531,4532,4533,4534,4535,4536,4537,4538, 4539,4540,4541,4542,4543,4544,4545,4546,4547,4548,4549,4550,4551,4552,4553, 4554,4555,4556,4557,4558,4559,4560,4561,4562,4563,4564,4565,4566,4567,4568, 4569,4570,4571,4572,4573,4574,4575,4576,4577,4578,4579,4580,4581,4582,4583, 4584,4585,4586,4587,4588,4589,4590,4591,4592,4593,4594,4595,4596,4597,4598, 4599,4600,4601,4602,4603,4604,4605,4606,4607,4608,4609,4610,4611,4612,4613, 4614,4615,4616,4617,4618,4619,4620,4621,4622,4623,4624,4625,4626,4627,4628, 4629,4630,4631,4632,4633,4634,4635,4636,4637,4638,4639,4640,4641,4642,4643, 4644,4645,4646,4647,4648,4649,4650,4651,4652,4653,4654,4655,4656,4657,4658, 4659,4660,4661,4662,4663,4664,4665,4666,4667,4668,4669,4670,4671,4672,4673, 4674,4675,4676,4677,4678,4679,4680,4681,4682,4683,4684,4685,4686,4687,4688, 4689,4690,4691,4692,4693,4694,4695,4696,4697,4698,4699,4700,4701,4702,4703, 4704,4705,4706,4707,4708,4709,4710,4711,4712,4713,4714,4715,4716,4717,4718, 4719,4720,4721,4722,4723,4724,4725,4726,4727,4728,4729,4730,4731,4732,4733, 4734,4735,4736,4737,4738,4739,4740,4741,4742,4743,4744,4745,4746,4747,4748, 4749,4750,4751,4752,4753,4754,4755,4756,4757,4758,4759,4760,4761,4762,4763, 4764,4765,4766,4767,4768,4769,4770,4771,4772,4773,4774,4775,4776,4777,4778, 4779,4780,4781,4782,4783,4784,4785,4786,4787,4788,4789,4790,4791,4792,4793, 4794,4795,4796,4797,4798,4799,4800,4801,4802,4803,4804,4805,4806,4807,4808, 4809,4810,4811,4812,4813,4814,4815,4816,4817,4818,4819,4820,4821,4822,4823, 4824,4825,4826,4827,4828,4829,4830,4831,4832,4833,4834,4835,4836,4837,4838, 4839,4840,4841,4842,4843,4844,4845,4846,4847,4848,4849,4850,4851,4852,4853, 4854,4855,4856,4857,4858,4859,4860,4861,4862,4863,4864,4865,4866,4867,4868, 4869,4870,4871,4872,4873,4874,4875,4876,4877,4878,4879,4880,4881,4882,4883, 4884,4885,4886,4887,4888,4889,4890,4891,4892,4893,4894,4895,4896,4897,4898, 4899,4900,4901,4902,4903,4904,4905,4906,4907,4908,4909,4910,4911,4912,4913, 4914,4915,4916,4917,4918,4919,4920,4921,4922,4923,4924,4925,4926,4927,4928, 4929,4930,4931,4932,4933,4934,4935,4936,4937,4938,4939,4940,4941,4942,4943, 4944,4945,4946,4947,4948,4949,4950,4951,4952,4953,4954,4955,4956,4957,4958, 4959,4960,4961,4962,4963,4964,4965,4966,4967,4968,4969,4970,4971,4972,4973, 4974,4975,4976,4977,4978,4979,4980,4981,4982,4983,4984,4985,4986,4987,4988, 4989,4990,4991,4992,4993,4994,4995,4996,4997,4998,4999,5000,5001,5002,5003, 5004,5005,5006,5007,5008,5009,5010,5011,5012,5013,5014,5015,5016,5017,5018, 5019,5020,5021,5022,5023,5024,5025,5026,5027,5028,5029,5030,5031,5032,5033, 5034,5035,5036,5037,5038,5039,5040,5041,5042,5043,5044,5045,5046,5047,5048, 5049,5050,5051,5052,5053,5054,5055,5056,5057,5058,5059,5060,5061,5062,5063, 5064,5065,5066,5067,5068,5069,5070,5071,5072,5073,5074,5075,5076,5077,5078, 5079,5080,5081,5082,5083,5084,5085,5086,5087,5088,5089,5090,5091,5092,5093, 5094,5095,5096,5097,5098,5099,5100,5101,5102,5103,5104,5105,5106,5107,5108, 5109,5110,5111,5104,5105,5106,5107,5108,5109,5118,5119,5120,5121,5122,5123, 5124,5125,5126,5127,5128,5129,5130,5131,5132,5133,5134,5135,5136,5137,5138, 5139,5140,5141,5142,5143,5144,5145,5146,5147,5148,5149,5150,5151,5152,5153, 5154,5155,5156,5157,5158,5159,5160,5161,5162,5163,5164,5165,5166,5167,5168, 5169,5170,5171,5172,5173,5174,5175,5176,5177,5178,5179,5180,5181,5182,5183, 5184,5185,5186,5187,5188,5189,5190,5191,5192,5193,5194,5195,5196,5197,5198, 5199,5200,5201,5202,5203,5204,5205,5206,5207,5208,5209,5210,5211,5212,5213, 5214,5215,5216,5217,5218,5219,5220,5221,5222,5223,5224,5225,5226,5227,5228, 5229,5230,5231,5232,5233,5234,5235,5236,5237,5238,5239,5240,5241,5242,5243, 5244,5245,5246,5247,5248,5249,5250,5251,5252,5253,5254,5255,5256,5257,5258, 5259,5260,5261,5262,5263,5264,5265,5266,5267,5268,5269,5270,5271,5272,5273, 5274,5275,5276,5277,5278,5279,5280,5281,5282,5283,5284,5285,5286,5287,5288, 5289,5290,5291,5292,5293,5294,5295,5296,5297,5298,5299,5300,5301,5302,5303, 5304,5305,5306,5307,5308,5309,5310,5311,5312,5313,5314,5315,5316,5317,5318, 5319,5320,5321,5322,5323,5324,5325,5326,5327,5328,5329,5330,5331,5332,5333, 5334,5335,5336,5337,5338,5339,5340,5341,5342,5343,5344,5345,5346,5347,5348, 5349,5350,5351,5352,5353,5354,5355,5356,5357,5358,5359,5360,5361,5362,5363, 5364,5365,5366,5367,5368,5369,5370,5371,5372,5373,5374,5375,5376,5377,5378, 5379,5380,5381,5382,5383,5384,5385,5386,5387,5388,5389,5390,5391,5392,5393, 5394,5395,5396,5397,5398,5399,5400,5401,5402,5403,5404,5405,5406,5407,5408, 5409,5410,5411,5412,5413,5414,5415,5416,5417,5418,5419,5420,5421,5422,5423, 5424,5425,5426,5427,5428,5429,5430,5431,5432,5433,5434,5435,5436,5437,5438, 5439,5440,5441,5442,5443,5444,5445,5446,5447,5448,5449,5450,5451,5452,5453, 5454,5455,5456,5457,5458,5459,5460,5461,5462,5463,5464,5465,5466,5467,5468, 5469,5470,5471,5472,5473,5474,5475,5476,5477,5478,5479,5480,5481,5482,5483, 5484,5485,5486,5487,5488,5489,5490,5491,5492,5493,5494,5495,5496,5497,5498, 5499,5500,5501,5502,5503,5504,5505,5506,5507,5508,5509,5510,5511,5512,5513, 5514,5515,5516,5517,5518,5519,5520,5521,5522,5523,5524,5525,5526,5527,5528, 5529,5530,5531,5532,5533,5534,5535,5536,5537,5538,5539,5540,5541,5542,5543, 5544,5545,5546,5547,5548,5549,5550,5551,5552,5553,5554,5555,5556,5557,5558, 5559,5560,5561,5562,5563,5564,5565,5566,5567,5568,5569,5570,5571,5572,5573, 5574,5575,5576,5577,5578,5579,5580,5581,5582,5583,5584,5585,5586,5587,5588, 5589,5590,5591,5592,5593,5594,5595,5596,5597,5598,5599,5600,5601,5602,5603, 5604,5605,5606,5607,5608,5609,5610,5611,5612,5613,5614,5615,5616,5617,5618, 5619,5620,5621,5622,5623,5624,5625,5626,5627,5628,5629,5630,5631,5632,5633, 5634,5635,5636,5637,5638,5639,5640,5641,5642,5643,5644,5645,5646,5647,5648, 5649,5650,5651,5652,5653,5654,5655,5656,5657,5658,5659,5660,5661,5662,5663, 5664,5665,5666,5667,5668,5669,5670,5671,5672,5673,5674,5675,5676,5677,5678, 5679,5680,5681,5682,5683,5684,5685,5686,5687,5688,5689,5690,5691,5692,5693, 5694,5695,5696,5697,5698,5699,5700,5701,5702,5703,5704,5705,5706,5707,5708, 5709,5710,5711,5712,5713,5714,5715,5716,5717,5718,5719,5720,5721,5722,5723, 5724,5725,5726,5727,5728,5729,5730,5731,5732,5733,5734,5735,5736,5737,5738, 5739,5740,5741,5742,5743,5744,5745,5746,5747,5748,5749,5750,5751,5752,5753, 5754,5755,5756,5757,5758,5759,5760,5761,5762,5763,5764,5765,5766,5767,5768, 5769,5770,5771,5772,5773,5774,5775,5776,5777,5778,5779,5780,5781,5782,5783, 5784,5785,5786,5787,5788,5789,5790,5791,5792,5793,5794,5795,5796,5797,5798, 5799,5800,5801,5802,5803,5804,5805,5806,5807,5808,5809,5810,5811,5812,5813, 5814,5815,5816,5817,5818,5819,5820,5821,5822,5823,5824,5825,5826,5827,5828, 5829,5830,5831,5832,5833,5834,5835,5836,5837,5838,5839,5840,5841,5842,5843, 5844,5845,5846,5847,5848,5849,5850,5851,5852,5853,5854,5855,5856,5857,5858, 5859,5860,5861,5862,5863,5864,5865,5866,5867,5868,5869,5870,5871,5872,5873, 5874,5875,5876,5877,5878,5879,5880,5881,5882,5883,5884,5885,5886,5887,5888, 5889,5890,5891,5892,5893,5894,5895,5896,5897,5898,5899,5900,5901,5902,5903, 5904,5905,5906,5907,5908,5909,5910,5911,5912,5913,5914,5915,5916,5917,5918, 5919,5920,5921,5922,5923,5924,5925,5926,5927,5928,5929,5930,5931,5932,5933, 5934,5935,5936,5937,5938,5939,5940,5941,5942,5943,5944,5945,5946,5947,5948, 5949,5950,5951,5952,5953,5954,5955,5956,5957,5958,5959,5960,5961,5962,5963, 5964,5965,5966,5967,5968,5969,5970,5971,5972,5973,5974,5975,5976,5977,5978, 5979,5980,5981,5982,5983,5984,5985,5986,5987,5988,5989,5990,5991,5992,5993, 5994,5995,5996,5997,5998,5999,6000,6001,6002,6003,6004,6005,6006,6007,6008, 6009,6010,6011,6012,6013,6014,6015,6016,6017,6018,6019,6020,6021,6022,6023, 6024,6025,6026,6027,6028,6029,6030,6031,6032,6033,6034,6035,6036,6037,6038, 6039,6040,6041,6042,6043,6044,6045,6046,6047,6048,6049,6050,6051,6052,6053, 6054,6055,6056,6057,6058,6059,6060,6061,6062,6063,6064,6065,6066,6067,6068, 6069,6070,6071,6072,6073,6074,6075,6076,6077,6078,6079,6080,6081,6082,6083, 6084,6085,6086,6087,6088,6089,6090,6091,6092,6093,6094,6095,6096,6097,6098, 6099,6100,6101,6102,6103,6104,6105,6106,6107,6108,6109,6110,6111,6112,6113, 6114,6115,6116,6117,6118,6119,6120,6121,6122,6123,6124,6125,6126,6127,6128, 6129,6130,6131,6132,6133,6134,6135,6136,6137,6138,6139,6140,6141,6142,6143, 6144,6145,6146,6147,6148,6149,6150,6151,6152,6153,6154,6155,6156,6157,6158, 6159,6160,6161,6162,6163,6164,6165,6166,6167,6168,6169,6170,6171,6172,6173, 6174,6175,6176,6177,6178,6179,6180,6181,6182,6183,6184,6185,6186,6187,6188, 6189,6190,6191,6192,6193,6194,6195,6196,6197,6198,6199,6200,6201,6202,6203, 6204,6205,6206,6207,6208,6209,6210,6211,6212,6213,6214,6215,6216,6217,6218, 6219,6220,6221,6222,6223,6224,6225,6226,6227,6228,6229,6230,6231,6232,6233, 6234,6235,6236,6237,6238,6239,6240,6241,6242,6243,6244,6245,6246,6247,6248, 6249,6250,6251,6252,6253,6254,6255,6256,6257,6258,6259,6260,6261,6262,6263, 6264,6265,6266,6267,6268,6269,6270,6271,6272,6273,6274,6275,6276,6277,6278, 6279,6280,6281,6282,6283,6284,6285,6286,6287,6288,6289,6290,6291,6292,6293, 6294,6295,6296,6297,6298,6299,6300,6301,6302,6303,6304,6305,6306,6307,6308, 6309,6310,6311,6312,6313,6314,6315,6316,6317,6318,6319,6320,6321,6322,6323, 6324,6325,6326,6327,6328,6329,6330,6331,6332,6333,6334,6335,6336,6337,6338, 6339,6340,6341,6342,6343,6344,6345,6346,6347,6348,6349,6350,6351,6352,6353, 6354,6355,6356,6357,6358,6359,6360,6361,6362,6363,6364,6365,6366,6367,6368, 6369,6370,6371,6372,6373,6374,6375,6376,6377,6378,6379,6380,6381,6382,6383, 6384,6385,6386,6387,6388,6389,6390,6391,6392,6393,6394,6395,6396,6397,6398, 6399,6400,6401,6402,6403,6404,6405,6406,6407,6408,6409,6410,6411,6412,6413, 6414,6415,6416,6417,6418,6419,6420,6421,6422,6423,6424,6425,6426,6427,6428, 6429,6430,6431,6432,6433,6434,6435,6436,6437,6438,6439,6440,6441,6442,6443, 6444,6445,6446,6447,6448,6449,6450,6451,6452,6453,6454,6455,6456,6457,6458, 6459,6460,6461,6462,6463,6464,6465,6466,6467,6468,6469,6470,6471,6472,6473, 6474,6475,6476,6477,6478,6479,6480,6481,6482,6483,6484,6485,6486,6487,6488, 6489,6490,6491,6492,6493,6494,6495,6496,6497,6498,6499,6500,6501,6502,6503, 6504,6505,6506,6507,6508,6509,6510,6511,6512,6513,6514,6515,6516,6517,6518, 6519,6520,6521,6522,6523,6524,6525,6526,6527,6528,6529,6530,6531,6532,6533, 6534,6535,6536,6537,6538,6539,6540,6541,6542,6543,6544,6545,6546,6547,6548, 6549,6550,6551,6552,6553,6554,6555,6556,6557,6558,6559,6560,6561,6562,6563, 6564,6565,6566,6567,6568,6569,6570,6571,6572,6573,6574,6575,6576,6577,6578, 6579,6580,6581,6582,6583,6584,6585,6586,6587,6588,6589,6590,6591,6592,6593, 6594,6595,6596,6597,6598,6599,6600,6601,6602,6603,6604,6605,6606,6607,6608, 6609,6610,6611,6612,6613,6614,6615,6616,6617,6618,6619,6620,6621,6622,6623, 6624,6625,6626,6627,6628,6629,6630,6631,6632,6633,6634,6635,6636,6637,6638, 6639,6640,6641,6642,6643,6644,6645,6646,6647,6648,6649,6650,6651,6652,6653, 6654,6655,6656,6657,6658,6659,6660,6661,6662,6663,6664,6665,6666,6667,6668, 6669,6670,6671,6672,6673,6674,6675,6676,6677,6678,6679,6680,6681,6682,6683, 6684,6685,6686,6687,6688,6689,6690,6691,6692,6693,6694,6695,6696,6697,6698, 6699,6700,6701,6702,6703,6704,6705,6706,6707,6708,6709,6710,6711,6712,6713, 6714,6715,6716,6717,6718,6719,6720,6721,6722,6723,6724,6725,6726,6727,6728, 6729,6730,6731,6732,6733,6734,6735,6736,6737,6738,6739,6740,6741,6742,6743, 6744,6745,6746,6747,6748,6749,6750,6751,6752,6753,6754,6755,6756,6757,6758, 6759,6760,6761,6762,6763,6764,6765,6766,6767,6768,6769,6770,6771,6772,6773, 6774,6775,6776,6777,6778,6779,6780,6781,6782,6783,6784,6785,6786,6787,6788, 6789,6790,6791,6792,6793,6794,6795,6796,6797,6798,6799,6800,6801,6802,6803, 6804,6805,6806,6807,6808,6809,6810,6811,6812,6813,6814,6815,6816,6817,6818, 6819,6820,6821,6822,6823,6824,6825,6826,6827,6828,6829,6830,6831,6832,6833, 6834,6835,6836,6837,6838,6839,6840,6841,6842,6843,6844,6845,6846,6847,6848, 6849,6850,6851,6852,6853,6854,6855,6856,6857,6858,6859,6860,6861,6862,6863, 6864,6865,6866,6867,6868,6869,6870,6871,6872,6873,6874,6875,6876,6877,6878, 6879,6880,6881,6882,6883,6884,6885,6886,6887,6888,6889,6890,6891,6892,6893, 6894,6895,6896,6897,6898,6899,6900,6901,6902,6903,6904,6905,6906,6907,6908, 6909,6910,6911,6912,6913,6914,6915,6916,6917,6918,6919,6920,6921,6922,6923, 6924,6925,6926,6927,6928,6929,6930,6931,6932,6933,6934,6935,6936,6937,6938, 6939,6940,6941,6942,6943,6944,6945,6946,6947,6948,6949,6950,6951,6952,6953, 6954,6955,6956,6957,6958,6959,6960,6961,6962,6963,6964,6965,6966,6967,6968, 6969,6970,6971,6972,6973,6974,6975,6976,6977,6978,6979,6980,6981,6982,6983, 6984,6985,6986,6987,6988,6989,6990,6991,6992,6993,6994,6995,6996,6997,6998, 6999,7000,7001,7002,7003,7004,7005,7006,7007,7008,7009,7010,7011,7012,7013, 7014,7015,7016,7017,7018,7019,7020,7021,7022,7023,7024,7025,7026,7027,7028, 7029,7030,7031,7032,7033,7034,7035,7036,7037,7038,7039,7040,7041,7042,7043, 7044,7045,7046,7047,7048,7049,7050,7051,7052,7053,7054,7055,7056,7057,7058, 7059,7060,7061,7062,7063,7064,7065,7066,7067,7068,7069,7070,7071,7072,7073, 7074,7075,7076,7077,7078,7079,7080,7081,7082,7083,7084,7085,7086,7087,7088, 7089,7090,7091,7092,7093,7094,7095,7096,7097,7098,7099,7100,7101,7102,7103, 7104,7105,7106,7107,7108,7109,7110,7111,7112,7113,7114,7115,7116,7117,7118, 7119,7120,7121,7122,7123,7124,7125,7126,7127,7128,7129,7130,7131,7132,7133, 7134,7135,7136,7137,7138,7139,7140,7141,7142,7143,7144,7145,7146,7147,7148, 7149,7150,7151,7152,7153,7154,7155,7156,7157,7158,7159,7160,7161,7162,7163, 7164,7165,7166,7167,7168,7169,7170,7171,7172,7173,7174,7175,7176,7177,7178, 7179,7180,7181,7182,7183,7184,7185,7186,7187,7188,7189,7190,7191,7192,7193, 7194,7195,7196,7197,7198,7199,7200,7201,7202,7203,7204,7205,7206,7207,7208, 7209,7210,7211,7212,7213,7214,7215,7216,7217,7218,7219,7220,7221,7222,7223, 7224,7225,7226,7227,7228,7229,7230,7231,7232,7233,7234,7235,7236,7237,7238, 7239,7240,7241,7242,7243,7244,7245,7246,7247,7248,7249,7250,7251,7252,7253, 7254,7255,7256,7257,7258,7259,7260,7261,7262,7263,7264,7265,7266,7267,7268, 7269,7270,7271,7272,7273,7274,7275,7276,7277,7278,7279,7280,7281,7282,7283, 7284,7285,7286,7287,7288,7289,7290,7291,7292,7293,7294,7295,1042,1044,1054, 1057,1058,1058,1066,1122,42570L,7305,7306,7307,7308,7309,7310,7311,7312, 7313,7314,7315,7316,7317,7318,7319,7320,7321,7322,7323,7324,7325,7326,7327, 7328,7329,7330,7331,7332,7333,7334,7335,7336,7337,7338,7339,7340,7341,7342, 7343,7344,7345,7346,7347,7348,7349,7350,7351,7352,7353,7354,7355,7356,7357, 7358,7359,7360,7361,7362,7363,7364,7365,7366,7367,7368,7369,7370,7371,7372, 7373,7374,7375,7376,7377,7378,7379,7380,7381,7382,7383,7384,7385,7386,7387, 7388,7389,7390,7391,7392,7393,7394,7395,7396,7397,7398,7399,7400,7401,7402, 7403,7404,7405,7406,7407,7408,7409,7410,7411,7412,7413,7414,7415,7416,7417, 7418,7419,7420,7421,7422,7423,7424,7425,7426,7427,7428,7429,7430,7431,7432, 7433,7434,7435,7436,7437,7438,7439,7440,7441,7442,7443,7444,7445,7446,7447, 7448,7449,7450,7451,7452,7453,7454,7455,7456,7457,7458,7459,7460,7461,7462, 7463,7464,7465,7466,7467,7468,7469,7470,7471,7472,7473,7474,7475,7476,7477, 7478,7479,7480,7481,7482,7483,7484,7485,7486,7487,7488,7489,7490,7491,7492, 7493,7494,7495,7496,7497,7498,7499,7500,7501,7502,7503,7504,7505,7506,7507, 7508,7509,7510,7511,7512,7513,7514,7515,7516,7517,7518,7519,7520,7521,7522, 7523,7524,7525,7526,7527,7528,7529,7530,7531,7532,7533,7534,7535,7536,7537, 7538,7539,7540,7541,7542,7543,7544,42877L,7546,7547,7548,11363,7550,7551, 7552,7553,7554,7555,7556,7557,7558,7559,7560,7561,7562,7563,7564,7565, 42950L,7567,7568,7569,7570,7571,7572,7573,7574,7575,7576,7577,7578,7579, 7580,7581,7582,7583,7584,7585,7586,7587,7588,7589,7590,7591,7592,7593,7594, 7595,7596,7597,7598,7599,7600,7601,7602,7603,7604,7605,7606,7607,7608,7609, 7610,7611,7612,7613,7614,7615,7616,7617,7618,7619,7620,7621,7622,7623,7624, 7625,7626,7627,7628,7629,7630,7631,7632,7633,7634,7635,7636,7637,7638,7639, 7640,7641,7642,7643,7644,7645,7646,7647,7648,7649,7650,7651,7652,7653,7654, 7655,7656,7657,7658,7659,7660,7661,7662,7663,7664,7665,7666,7667,7668,7669, 7670,7671,7672,7673,7674,7675,7676,7677,7678,7679,7680,7680,7682,7682,7684, 7684,7686,7686,7688,7688,7690,7690,7692,7692,7694,7694,7696,7696,7698,7698, 7700,7700,7702,7702,7704,7704,7706,7706,7708,7708,7710,7710,7712,7712,7714, 7714,7716,7716,7718,7718,7720,7720,7722,7722,7724,7724,7726,7726,7728,7728, 7730,7730,7732,7732,7734,7734,7736,7736,7738,7738,7740,7740,7742,7742,7744, 7744,7746,7746,7748,7748,7750,7750,7752,7752,7754,7754,7756,7756,7758,7758, 7760,7760,7762,7762,7764,7764,7766,7766,7768,7768,7770,7770,7772,7772,7774, 7774,7776,7776,7778,7778,7780,7780,7782,7782,7784,7784,7786,7786,7788,7788, 7790,7790,7792,7792,7794,7794,7796,7796,7798,7798,7800,7800,7802,7802,7804, 7804,7806,7806,7808,7808,7810,7810,7812,7812,7814,7814,7816,7816,7818,7818, 7820,7820,7822,7822,7824,7824,7826,7826,7828,7828,7830,7831,7832,7833,7834, 7776,7836,7837,7838,7839,7840,7840,7842,7842,7844,7844,7846,7846,7848,7848, 7850,7850,7852,7852,7854,7854,7856,7856,7858,7858,7860,7860,7862,7862,7864, 7864,7866,7866,7868,7868,7870,7870,7872,7872,7874,7874,7876,7876,7878,7878, 7880,7880,7882,7882,7884,7884,7886,7886,7888,7888,7890,7890,7892,7892,7894, 7894,7896,7896,7898,7898,7900,7900,7902,7902,7904,7904,7906,7906,7908,7908, 7910,7910,7912,7912,7914,7914,7916,7916,7918,7918,7920,7920,7922,7922,7924, 7924,7926,7926,7928,7928,7930,7930,7932,7932,7934,7934,7944,7945,7946,7947, 7948,7949,7950,7951,7944,7945,7946,7947,7948,7949,7950,7951,7960,7961,7962, 7963,7964,7965,7958,7959,7960,7961,7962,7963,7964,7965,7966,7967,7976,7977, 7978,7979,7980,7981,7982,7983,7976,7977,7978,7979,7980,7981,7982,7983,7992, 7993,7994,7995,7996,7997,7998,7999,7992,7993,7994,7995,7996,7997,7998,7999, 8008,8009,8010,8011,8012,8013,8006,8007,8008,8009,8010,8011,8012,8013,8014, 8015,8016,8025,8018,8027,8020,8029,8022,8031,8024,8025,8026,8027,8028,8029, 8030,8031,8040,8041,8042,8043,8044,8045,8046,8047,8040,8041,8042,8043,8044, 8045,8046,8047,8122,8123,8136,8137,8138,8139,8154,8155,8184,8185,8170,8171, 8186,8187,8062,8063,8064,8065,8066,8067,8068,8069,8070,8071,8072,8073,8074, 8075,8076,8077,8078,8079,8080,8081,8082,8083,8084,8085,8086,8087,8088,8089, 8090,8091,8092,8093,8094,8095,8096,8097,8098,8099,8100,8101,8102,8103,8104, 8105,8106,8107,8108,8109,8110,8111,8120,8121,8114,8115,8116,8117,8118,8119, 8120,8121,8122,8123,8124,8125,921,8127,8128,8129,8130,8131,8132,8133,8134, 8135,8136,8137,8138,8139,8140,8141,8142,8143,8152,8153,8146,8147,8148,8149, 8150,8151,8152,8153,8154,8155,8156,8157,8158,8159,8168,8169,8162,8163,8164, 8172,8166,8167,8168,8169,8170,8171,8172,8173,8174,8175,8176,8177,8178,8179, 8180,8181,8182,8183,8184,8185,8186,8187,8188,8189,8190,8191,8192,8193,8194, 8195,8196,8197,8198,8199,8200,8201,8202,8203,8204,8205,8206,8207,8208,8209, 8210,8211,8212,8213,8214,8215,8216,8217,8218,8219,8220,8221,8222,8223,8224, 8225,8226,8227,8228,8229,8230,8231,8232,8233,8234,8235,8236,8237,8238,8239, 8240,8241,8242,8243,8244,8245,8246,8247,8248,8249,8250,8251,8252,8253,8254, 8255,8256,8257,8258,8259,8260,8261,8262,8263,8264,8265,8266,8267,8268,8269, 8270,8271,8272,8273,8274,8275,8276,8277,8278,8279,8280,8281,8282,8283,8284, 8285,8286,8287,8288,8289,8290,8291,8292,8293,8294,8295,8296,8297,8298,8299, 8300,8301,8302,8303,8304,8305,8306,8307,8308,8309,8310,8311,8312,8313,8314, 8315,8316,8317,8318,8319,8320,8321,8322,8323,8324,8325,8326,8327,8328,8329, 8330,8331,8332,8333,8334,8335,8336,8337,8338,8339,8340,8341,8342,8343,8344, 8345,8346,8347,8348,8349,8350,8351,8352,8353,8354,8355,8356,8357,8358,8359, 8360,8361,8362,8363,8364,8365,8366,8367,8368,8369,8370,8371,8372,8373,8374, 8375,8376,8377,8378,8379,8380,8381,8382,8383,8384,8385,8386,8387,8388,8389, 8390,8391,8392,8393,8394,8395,8396,8397,8398,8399,8400,8401,8402,8403,8404, 8405,8406,8407,8408,8409,8410,8411,8412,8413,8414,8415,8416,8417,8418,8419, 8420,8421,8422,8423,8424,8425,8426,8427,8428,8429,8430,8431,8432,8433,8434, 8435,8436,8437,8438,8439,8440,8441,8442,8443,8444,8445,8446,8447,8448,8449, 8450,8451,8452,8453,8454,8455,8456,8457,8458,8459,8460,8461,8462,8463,8464, 8465,8466,8467,8468,8469,8470,8471,8472,8473,8474,8475,8476,8477,8478,8479, 8480,8481,8482,8483,8484,8485,8486,8487,8488,8489,8490,8491,8492,8493,8494, 8495,8496,8497,8498,8499,8500,8501,8502,8503,8504,8505,8506,8507,8508,8509, 8510,8511,8512,8513,8514,8515,8516,8517,8518,8519,8520,8521,8522,8523,8524, 8525,8498,8527,8528,8529,8530,8531,8532,8533,8534,8535,8536,8537,8538,8539, 8540,8541,8542,8543,8544,8545,8546,8547,8548,8549,8550,8551,8552,8553,8554, 8555,8556,8557,8558,8559,8544,8545,8546,8547,8548,8549,8550,8551,8552,8553, 8554,8555,8556,8557,8558,8559,8576,8577,8578,8579,8579,8581,8582,8583,8584, 8585,8586,8587,8588,8589,8590,8591,8592,8593,8594,8595,8596,8597,8598,8599, 8600,8601,8602,8603,8604,8605,8606,8607,8608,8609,8610,8611,8612,8613,8614, 8615,8616,8617,8618,8619,8620,8621,8622,8623,8624,8625,8626,8627,8628,8629, 8630,8631,8632,8633,8634,8635,8636,8637,8638,8639,8640,8641,8642,8643,8644, 8645,8646,8647,8648,8649,8650,8651,8652,8653,8654,8655,8656,8657,8658,8659, 8660,8661,8662,8663,8664,8665,8666,8667,8668,8669,8670,8671,8672,8673,8674, 8675,8676,8677,8678,8679,8680,8681,8682,8683,8684,8685,8686,8687,8688,8689, 8690,8691,8692,8693,8694,8695,8696,8697,8698,8699,8700,8701,8702,8703,8704, 8705,8706,8707,8708,8709,8710,8711,8712,8713,8714,8715,8716,8717,8718,8719, 8720,8721,8722,8723,8724,8725,8726,8727,8728,8729,8730,8731,8732,8733,8734, 8735,8736,8737,8738,8739,8740,8741,8742,8743,8744,8745,8746,8747,8748,8749, 8750,8751,8752,8753,8754,8755,8756,8757,8758,8759,8760,8761,8762,8763,8764, 8765,8766,8767,8768,8769,8770,8771,8772,8773,8774,8775,8776,8777,8778,8779, 8780,8781,8782,8783,8784,8785,8786,8787,8788,8789,8790,8791,8792,8793,8794, 8795,8796,8797,8798,8799,8800,8801,8802,8803,8804,8805,8806,8807,8808,8809, 8810,8811,8812,8813,8814,8815,8816,8817,8818,8819,8820,8821,8822,8823,8824, 8825,8826,8827,8828,8829,8830,8831,8832,8833,8834,8835,8836,8837,8838,8839, 8840,8841,8842,8843,8844,8845,8846,8847,8848,8849,8850,8851,8852,8853,8854, 8855,8856,8857,8858,8859,8860,8861,8862,8863,8864,8865,8866,8867,8868,8869, 8870,8871,8872,8873,8874,8875,8876,8877,8878,8879,8880,8881,8882,8883,8884, 8885,8886,8887,8888,8889,8890,8891,8892,8893,8894,8895,8896,8897,8898,8899, 8900,8901,8902,8903,8904,8905,8906,8907,8908,8909,8910,8911,8912,8913,8914, 8915,8916,8917,8918,8919,8920,8921,8922,8923,8924,8925,8926,8927,8928,8929, 8930,8931,8932,8933,8934,8935,8936,8937,8938,8939,8940,8941,8942,8943,8944, 8945,8946,8947,8948,8949,8950,8951,8952,8953,8954,8955,8956,8957,8958,8959, 8960,8961,8962,8963,8964,8965,8966,8967,8968,8969,8970,8971,8972,8973,8974, 8975,8976,8977,8978,8979,8980,8981,8982,8983,8984,8985,8986,8987,8988,8989, 8990,8991,8992,8993,8994,8995,8996,8997,8998,8999,9000,9001,9002,9003,9004, 9005,9006,9007,9008,9009,9010,9011,9012,9013,9014,9015,9016,9017,9018,9019, 9020,9021,9022,9023,9024,9025,9026,9027,9028,9029,9030,9031,9032,9033,9034, 9035,9036,9037,9038,9039,9040,9041,9042,9043,9044,9045,9046,9047,9048,9049, 9050,9051,9052,9053,9054,9055,9056,9057,9058,9059,9060,9061,9062,9063,9064, 9065,9066,9067,9068,9069,9070,9071,9072,9073,9074,9075,9076,9077,9078,9079, 9080,9081,9082,9083,9084,9085,9086,9087,9088,9089,9090,9091,9092,9093,9094, 9095,9096,9097,9098,9099,9100,9101,9102,9103,9104,9105,9106,9107,9108,9109, 9110,9111,9112,9113,9114,9115,9116,9117,9118,9119,9120,9121,9122,9123,9124, 9125,9126,9127,9128,9129,9130,9131,9132,9133,9134,9135,9136,9137,9138,9139, 9140,9141,9142,9143,9144,9145,9146,9147,9148,9149,9150,9151,9152,9153,9154, 9155,9156,9157,9158,9159,9160,9161,9162,9163,9164,9165,9166,9167,9168,9169, 9170,9171,9172,9173,9174,9175,9176,9177,9178,9179,9180,9181,9182,9183,9184, 9185,9186,9187,9188,9189,9190,9191,9192,9193,9194,9195,9196,9197,9198,9199, 9200,9201,9202,9203,9204,9205,9206,9207,9208,9209,9210,9211,9212,9213,9214, 9215,9216,9217,9218,9219,9220,9221,9222,9223,9224,9225,9226,9227,9228,9229, 9230,9231,9232,9233,9234,9235,9236,9237,9238,9239,9240,9241,9242,9243,9244, 9245,9246,9247,9248,9249,9250,9251,9252,9253,9254,9255,9256,9257,9258,9259, 9260,9261,9262,9263,9264,9265,9266,9267,9268,9269,9270,9271,9272,9273,9274, 9275,9276,9277,9278,9279,9280,9281,9282,9283,9284,9285,9286,9287,9288,9289, 9290,9291,9292,9293,9294,9295,9296,9297,9298,9299,9300,9301,9302,9303,9304, 9305,9306,9307,9308,9309,9310,9311,9312,9313,9314,9315,9316,9317,9318,9319, 9320,9321,9322,9323,9324,9325,9326,9327,9328,9329,9330,9331,9332,9333,9334, 9335,9336,9337,9338,9339,9340,9341,9342,9343,9344,9345,9346,9347,9348,9349, 9350,9351,9352,9353,9354,9355,9356,9357,9358,9359,9360,9361,9362,9363,9364, 9365,9366,9367,9368,9369,9370,9371,9372,9373,9374,9375,9376,9377,9378,9379, 9380,9381,9382,9383,9384,9385,9386,9387,9388,9389,9390,9391,9392,9393,9394, 9395,9396,9397,9398,9399,9400,9401,9402,9403,9404,9405,9406,9407,9408,9409, 9410,9411,9412,9413,9414,9415,9416,9417,9418,9419,9420,9421,9422,9423,9398, 9399,9400,9401,9402,9403,9404,9405,9406,9407,9408,9409,9410,9411,9412,9413, 9414,9415,9416,9417,9418,9419,9420,9421,9422,9423,9450,9451,9452,9453,9454, 9455,9456,9457,9458,9459,9460,9461,9462,9463,9464,9465,9466,9467,9468,9469, 9470,9471,9472,9473,9474,9475,9476,9477,9478,9479,9480,9481,9482,9483,9484, 9485,9486,9487,9488,9489,9490,9491,9492,9493,9494,9495,9496,9497,9498,9499, 9500,9501,9502,9503,9504,9505,9506,9507,9508,9509,9510,9511,9512,9513,9514, 9515,9516,9517,9518,9519,9520,9521,9522,9523,9524,9525,9526,9527,9528,9529, 9530,9531,9532,9533,9534,9535,9536,9537,9538,9539,9540,9541,9542,9543,9544, 9545,9546,9547,9548,9549,9550,9551,9552,9553,9554,9555,9556,9557,9558,9559, 9560,9561,9562,9563,9564,9565,9566,9567,9568,9569,9570,9571,9572,9573,9574, 9575,9576,9577,9578,9579,9580,9581,9582,9583,9584,9585,9586,9587,9588,9589, 9590,9591,9592,9593,9594,9595,9596,9597,9598,9599,9600,9601,9602,9603,9604, 9605,9606,9607,9608,9609,9610,9611,9612,9613,9614,9615,9616,9617,9618,9619, 9620,9621,9622,9623,9624,9625,9626,9627,9628,9629,9630,9631,9632,9633,9634, 9635,9636,9637,9638,9639,9640,9641,9642,9643,9644,9645,9646,9647,9648,9649, 9650,9651,9652,9653,9654,9655,9656,9657,9658,9659,9660,9661,9662,9663,9664, 9665,9666,9667,9668,9669,9670,9671,9672,9673,9674,9675,9676,9677,9678,9679, 9680,9681,9682,9683,9684,9685,9686,9687,9688,9689,9690,9691,9692,9693,9694, 9695,9696,9697,9698,9699,9700,9701,9702,9703,9704,9705,9706,9707,9708,9709, 9710,9711,9712,9713,9714,9715,9716,9717,9718,9719,9720,9721,9722,9723,9724, 9725,9726,9727,9728,9729,9730,9731,9732,9733,9734,9735,9736,9737,9738,9739, 9740,9741,9742,9743,9744,9745,9746,9747,9748,9749,9750,9751,9752,9753,9754, 9755,9756,9757,9758,9759,9760,9761,9762,9763,9764,9765,9766,9767,9768,9769, 9770,9771,9772,9773,9774,9775,9776,9777,9778,9779,9780,9781,9782,9783,9784, 9785,9786,9787,9788,9789,9790,9791,9792,9793,9794,9795,9796,9797,9798,9799, 9800,9801,9802,9803,9804,9805,9806,9807,9808,9809,9810,9811,9812,9813,9814, 9815,9816,9817,9818,9819,9820,9821,9822,9823,9824,9825,9826,9827,9828,9829, 9830,9831,9832,9833,9834,9835,9836,9837,9838,9839,9840,9841,9842,9843,9844, 9845,9846,9847,9848,9849,9850,9851,9852,9853,9854,9855,9856,9857,9858,9859, 9860,9861,9862,9863,9864,9865,9866,9867,9868,9869,9870,9871,9872,9873,9874, 9875,9876,9877,9878,9879,9880,9881,9882,9883,9884,9885,9886,9887,9888,9889, 9890,9891,9892,9893,9894,9895,9896,9897,9898,9899,9900,9901,9902,9903,9904, 9905,9906,9907,9908,9909,9910,9911,9912,9913,9914,9915,9916,9917,9918,9919, 9920,9921,9922,9923,9924,9925,9926,9927,9928,9929,9930,9931,9932,9933,9934, 9935,9936,9937,9938,9939,9940,9941,9942,9943,9944,9945,9946,9947,9948,9949, 9950,9951,9952,9953,9954,9955,9956,9957,9958,9959,9960,9961,9962,9963,9964, 9965,9966,9967,9968,9969,9970,9971,9972,9973,9974,9975,9976,9977,9978,9979, 9980,9981,9982,9983,9984,9985,9986,9987,9988,9989,9990,9991,9992,9993,9994, 9995,9996,9997,9998,9999,10000,10001,10002,10003,10004,10005,10006,10007, 10008,10009,10010,10011,10012,10013,10014,10015,10016,10017,10018,10019, 10020,10021,10022,10023,10024,10025,10026,10027,10028,10029,10030,10031, 10032,10033,10034,10035,10036,10037,10038,10039,10040,10041,10042,10043, 10044,10045,10046,10047,10048,10049,10050,10051,10052,10053,10054,10055, 10056,10057,10058,10059,10060,10061,10062,10063,10064,10065,10066,10067, 10068,10069,10070,10071,10072,10073,10074,10075,10076,10077,10078,10079, 10080,10081,10082,10083,10084,10085,10086,10087,10088,10089,10090,10091, 10092,10093,10094,10095,10096,10097,10098,10099,10100,10101,10102,10103, 10104,10105,10106,10107,10108,10109,10110,10111,10112,10113,10114,10115, 10116,10117,10118,10119,10120,10121,10122,10123,10124,10125,10126,10127, 10128,10129,10130,10131,10132,10133,10134,10135,10136,10137,10138,10139, 10140,10141,10142,10143,10144,10145,10146,10147,10148,10149,10150,10151, 10152,10153,10154,10155,10156,10157,10158,10159,10160,10161,10162,10163, 10164,10165,10166,10167,10168,10169,10170,10171,10172,10173,10174,10175, 10176,10177,10178,10179,10180,10181,10182,10183,10184,10185,10186,10187, 10188,10189,10190,10191,10192,10193,10194,10195,10196,10197,10198,10199, 10200,10201,10202,10203,10204,10205,10206,10207,10208,10209,10210,10211, 10212,10213,10214,10215,10216,10217,10218,10219,10220,10221,10222,10223, 10224,10225,10226,10227,10228,10229,10230,10231,10232,10233,10234,10235, 10236,10237,10238,10239,10240,10241,10242,10243,10244,10245,10246,10247, 10248,10249,10250,10251,10252,10253,10254,10255,10256,10257,10258,10259, 10260,10261,10262,10263,10264,10265,10266,10267,10268,10269,10270,10271, 10272,10273,10274,10275,10276,10277,10278,10279,10280,10281,10282,10283, 10284,10285,10286,10287,10288,10289,10290,10291,10292,10293,10294,10295, 10296,10297,10298,10299,10300,10301,10302,10303,10304,10305,10306,10307, 10308,10309,10310,10311,10312,10313,10314,10315,10316,10317,10318,10319, 10320,10321,10322,10323,10324,10325,10326,10327,10328,10329,10330,10331, 10332,10333,10334,10335,10336,10337,10338,10339,10340,10341,10342,10343, 10344,10345,10346,10347,10348,10349,10350,10351,10352,10353,10354,10355, 10356,10357,10358,10359,10360,10361,10362,10363,10364,10365,10366,10367, 10368,10369,10370,10371,10372,10373,10374,10375,10376,10377,10378,10379, 10380,10381,10382,10383,10384,10385,10386,10387,10388,10389,10390,10391, 10392,10393,10394,10395,10396,10397,10398,10399,10400,10401,10402,10403, 10404,10405,10406,10407,10408,10409,10410,10411,10412,10413,10414,10415, 10416,10417,10418,10419,10420,10421,10422,10423,10424,10425,10426,10427, 10428,10429,10430,10431,10432,10433,10434,10435,10436,10437,10438,10439, 10440,10441,10442,10443,10444,10445,10446,10447,10448,10449,10450,10451, 10452,10453,10454,10455,10456,10457,10458,10459,10460,10461,10462,10463, 10464,10465,10466,10467,10468,10469,10470,10471,10472,10473,10474,10475, 10476,10477,10478,10479,10480,10481,10482,10483,10484,10485,10486,10487, 10488,10489,10490,10491,10492,10493,10494,10495,10496,10497,10498,10499, 10500,10501,10502,10503,10504,10505,10506,10507,10508,10509,10510,10511, 10512,10513,10514,10515,10516,10517,10518,10519,10520,10521,10522,10523, 10524,10525,10526,10527,10528,10529,10530,10531,10532,10533,10534,10535, 10536,10537,10538,10539,10540,10541,10542,10543,10544,10545,10546,10547, 10548,10549,10550,10551,10552,10553,10554,10555,10556,10557,10558,10559, 10560,10561,10562,10563,10564,10565,10566,10567,10568,10569,10570,10571, 10572,10573,10574,10575,10576,10577,10578,10579,10580,10581,10582,10583, 10584,10585,10586,10587,10588,10589,10590,10591,10592,10593,10594,10595, 10596,10597,10598,10599,10600,10601,10602,10603,10604,10605,10606,10607, 10608,10609,10610,10611,10612,10613,10614,10615,10616,10617,10618,10619, 10620,10621,10622,10623,10624,10625,10626,10627,10628,10629,10630,10631, 10632,10633,10634,10635,10636,10637,10638,10639,10640,10641,10642,10643, 10644,10645,10646,10647,10648,10649,10650,10651,10652,10653,10654,10655, 10656,10657,10658,10659,10660,10661,10662,10663,10664,10665,10666,10667, 10668,10669,10670,10671,10672,10673,10674,10675,10676,10677,10678,10679, 10680,10681,10682,10683,10684,10685,10686,10687,10688,10689,10690,10691, 10692,10693,10694,10695,10696,10697,10698,10699,10700,10701,10702,10703, 10704,10705,10706,10707,10708,10709,10710,10711,10712,10713,10714,10715, 10716,10717,10718,10719,10720,10721,10722,10723,10724,10725,10726,10727, 10728,10729,10730,10731,10732,10733,10734,10735,10736,10737,10738,10739, 10740,10741,10742,10743,10744,10745,10746,10747,10748,10749,10750,10751, 10752,10753,10754,10755,10756,10757,10758,10759,10760,10761,10762,10763, 10764,10765,10766,10767,10768,10769,10770,10771,10772,10773,10774,10775, 10776,10777,10778,10779,10780,10781,10782,10783,10784,10785,10786,10787, 10788,10789,10790,10791,10792,10793,10794,10795,10796,10797,10798,10799, 10800,10801,10802,10803,10804,10805,10806,10807,10808,10809,10810,10811, 10812,10813,10814,10815,10816,10817,10818,10819,10820,10821,10822,10823, 10824,10825,10826,10827,10828,10829,10830,10831,10832,10833,10834,10835, 10836,10837,10838,10839,10840,10841,10842,10843,10844,10845,10846,10847, 10848,10849,10850,10851,10852,10853,10854,10855,10856,10857,10858,10859, 10860,10861,10862,10863,10864,10865,10866,10867,10868,10869,10870,10871, 10872,10873,10874,10875,10876,10877,10878,10879,10880,10881,10882,10883, 10884,10885,10886,10887,10888,10889,10890,10891,10892,10893,10894,10895, 10896,10897,10898,10899,10900,10901,10902,10903,10904,10905,10906,10907, 10908,10909,10910,10911,10912,10913,10914,10915,10916,10917,10918,10919, 10920,10921,10922,10923,10924,10925,10926,10927,10928,10929,10930,10931, 10932,10933,10934,10935,10936,10937,10938,10939,10940,10941,10942,10943, 10944,10945,10946,10947,10948,10949,10950,10951,10952,10953,10954,10955, 10956,10957,10958,10959,10960,10961,10962,10963,10964,10965,10966,10967, 10968,10969,10970,10971,10972,10973,10974,10975,10976,10977,10978,10979, 10980,10981,10982,10983,10984,10985,10986,10987,10988,10989,10990,10991, 10992,10993,10994,10995,10996,10997,10998,10999,11000,11001,11002,11003, 11004,11005,11006,11007,11008,11009,11010,11011,11012,11013,11014,11015, 11016,11017,11018,11019,11020,11021,11022,11023,11024,11025,11026,11027, 11028,11029,11030,11031,11032,11033,11034,11035,11036,11037,11038,11039, 11040,11041,11042,11043,11044,11045,11046,11047,11048,11049,11050,11051, 11052,11053,11054,11055,11056,11057,11058,11059,11060,11061,11062,11063, 11064,11065,11066,11067,11068,11069,11070,11071,11072,11073,11074,11075, 11076,11077,11078,11079,11080,11081,11082,11083,11084,11085,11086,11087, 11088,11089,11090,11091,11092,11093,11094,11095,11096,11097,11098,11099, 11100,11101,11102,11103,11104,11105,11106,11107,11108,11109,11110,11111, 11112,11113,11114,11115,11116,11117,11118,11119,11120,11121,11122,11123, 11124,11125,11126,11127,11128,11129,11130,11131,11132,11133,11134,11135, 11136,11137,11138,11139,11140,11141,11142,11143,11144,11145,11146,11147, 11148,11149,11150,11151,11152,11153,11154,11155,11156,11157,11158,11159, 11160,11161,11162,11163,11164,11165,11166,11167,11168,11169,11170,11171, 11172,11173,11174,11175,11176,11177,11178,11179,11180,11181,11182,11183, 11184,11185,11186,11187,11188,11189,11190,11191,11192,11193,11194,11195, 11196,11197,11198,11199,11200,11201,11202,11203,11204,11205,11206,11207, 11208,11209,11210,11211,11212,11213,11214,11215,11216,11217,11218,11219, 11220,11221,11222,11223,11224,11225,11226,11227,11228,11229,11230,11231, 11232,11233,11234,11235,11236,11237,11238,11239,11240,11241,11242,11243, 11244,11245,11246,11247,11248,11249,11250,11251,11252,11253,11254,11255, 11256,11257,11258,11259,11260,11261,11262,11263,11264,11265,11266,11267, 11268,11269,11270,11271,11272,11273,11274,11275,11276,11277,11278,11279, 11280,11281,11282,11283,11284,11285,11286,11287,11288,11289,11290,11291, 11292,11293,11294,11295,11296,11297,11298,11299,11300,11301,11302,11303, 11304,11305,11306,11307,11308,11309,11310,11311,11264,11265,11266,11267, 11268,11269,11270,11271,11272,11273,11274,11275,11276,11277,11278,11279, 11280,11281,11282,11283,11284,11285,11286,11287,11288,11289,11290,11291, 11292,11293,11294,11295,11296,11297,11298,11299,11300,11301,11302,11303, 11304,11305,11306,11307,11308,11309,11310,11359,11360,11360,11362,11363, 11364,570,574,11367,11367,11369,11369,11371,11371,11373,11374,11375,11376, 11377,11378,11378,11380,11381,11381,11383,11384,11385,11386,11387,11388, 11389,11390,11391,11392,11392,11394,11394,11396,11396,11398,11398,11400, 11400,11402,11402,11404,11404,11406,11406,11408,11408,11410,11410,11412, 11412,11414,11414,11416,11416,11418,11418,11420,11420,11422,11422,11424, 11424,11426,11426,11428,11428,11430,11430,11432,11432,11434,11434,11436, 11436,11438,11438,11440,11440,11442,11442,11444,11444,11446,11446,11448, 11448,11450,11450,11452,11452,11454,11454,11456,11456,11458,11458,11460, 11460,11462,11462,11464,11464,11466,11466,11468,11468,11470,11470,11472, 11472,11474,11474,11476,11476,11478,11478,11480,11480,11482,11482,11484, 11484,11486,11486,11488,11488,11490,11490,11492,11493,11494,11495,11496, 11497,11498,11499,11499,11501,11501,11503,11504,11505,11506,11506,11508, 11509,11510,11511,11512,11513,11514,11515,11516,11517,11518,11519,4256, 4257,4258,4259,4260,4261,4262,4263,4264,4265,4266,4267,4268,4269,4270,4271, 4272,4273,4274,4275,4276,4277,4278,4279,4280,4281,4282,4283,4284,4285,4286, 4287,4288,4289,4290,4291,4292,4293,11558,4295,11560,11561,11562,11563, 11564,4301,11566,11567,11568,11569,11570,11571,11572,11573,11574,11575, 11576,11577,11578,11579,11580,11581,11582,11583,11584,11585,11586,11587, 11588,11589,11590,11591,11592,11593,11594,11595,11596,11597,11598,11599, 11600,11601,11602,11603,11604,11605,11606,11607,11608,11609,11610,11611, 11612,11613,11614,11615,11616,11617,11618,11619,11620,11621,11622,11623, 11624,11625,11626,11627,11628,11629,11630,11631,11632,11633,11634,11635, 11636,11637,11638,11639,11640,11641,11642,11643,11644,11645,11646,11647, 11648,11649,11650,11651,11652,11653,11654,11655,11656,11657,11658,11659, 11660,11661,11662,11663,11664,11665,11666,11667,11668,11669,11670,11671, 11672,11673,11674,11675,11676,11677,11678,11679,11680,11681,11682,11683, 11684,11685,11686,11687,11688,11689,11690,11691,11692,11693,11694,11695, 11696,11697,11698,11699,11700,11701,11702,11703,11704,11705,11706,11707, 11708,11709,11710,11711,11712,11713,11714,11715,11716,11717,11718,11719, 11720,11721,11722,11723,11724,11725,11726,11727,11728,11729,11730,11731, 11732,11733,11734,11735,11736,11737,11738,11739,11740,11741,11742,11743, 11744,11745,11746,11747,11748,11749,11750,11751,11752,11753,11754,11755, 11756,11757,11758,11759,11760,11761,11762,11763,11764,11765,11766,11767, 11768,11769,11770,11771,11772,11773,11774,11775,11776,11777,11778,11779, 11780,11781,11782,11783,11784,11785,11786,11787,11788,11789,11790,11791, 11792,11793,11794,11795,11796,11797,11798,11799,11800,11801,11802,11803, 11804,11805,11806,11807,11808,11809,11810,11811,11812,11813,11814,11815, 11816,11817,11818,11819,11820,11821,11822,11823,11824,11825,11826,11827, 11828,11829,11830,11831,11832,11833,11834,11835,11836,11837,11838,11839, 11840,11841,11842,11843,11844,11845,11846,11847,11848,11849,11850,11851, 11852,11853,11854,11855,11856,11857,11858,11859,11860,11861,11862,11863, 11864,11865,11866,11867,11868,11869,11870,11871,11872,11873,11874,11875, 11876,11877,11878,11879,11880,11881,11882,11883,11884,11885,11886,11887, 11888,11889,11890,11891,11892,11893,11894,11895,11896,11897,11898,11899, 11900,11901,11902,11903,11904,11905,11906,11907,11908,11909,11910,11911, 11912,11913,11914,11915,11916,11917,11918,11919,11920,11921,11922,11923, 11924,11925,11926,11927,11928,11929,11930,11931,11932,11933,11934,11935, 11936,11937,11938,11939,11940,11941,11942,11943,11944,11945,11946,11947, 11948,11949,11950,11951,11952,11953,11954,11955,11956,11957,11958,11959, 11960,11961,11962,11963,11964,11965,11966,11967,11968,11969,11970,11971, 11972,11973,11974,11975,11976,11977,11978,11979,11980,11981,11982,11983, 11984,11985,11986,11987,11988,11989,11990,11991,11992,11993,11994,11995, 11996,11997,11998,11999,12000,12001,12002,12003,12004,12005,12006,12007, 12008,12009,12010,12011,12012,12013,12014,12015,12016,12017,12018,12019, 12020,12021,12022,12023,12024,12025,12026,12027,12028,12029,12030,12031, 12032,12033,12034,12035,12036,12037,12038,12039,12040,12041,12042,12043, 12044,12045,12046,12047,12048,12049,12050,12051,12052,12053,12054,12055, 12056,12057,12058,12059,12060,12061,12062,12063,12064,12065,12066,12067, 12068,12069,12070,12071,12072,12073,12074,12075,12076,12077,12078,12079, 12080,12081,12082,12083,12084,12085,12086,12087,12088,12089,12090,12091, 12092,12093,12094,12095,12096,12097,12098,12099,12100,12101,12102,12103, 12104,12105,12106,12107,12108,12109,12110,12111,12112,12113,12114,12115, 12116,12117,12118,12119,12120,12121,12122,12123,12124,12125,12126,12127, 12128,12129,12130,12131,12132,12133,12134,12135,12136,12137,12138,12139, 12140,12141,12142,12143,12144,12145,12146,12147,12148,12149,12150,12151, 12152,12153,12154,12155,12156,12157,12158,12159,12160,12161,12162,12163, 12164,12165,12166,12167,12168,12169,12170,12171,12172,12173,12174,12175, 12176,12177,12178,12179,12180,12181,12182,12183,12184,12185,12186,12187, 12188,12189,12190,12191,12192,12193,12194,12195,12196,12197,12198,12199, 12200,12201,12202,12203,12204,12205,12206,12207,12208,12209,12210,12211, 12212,12213,12214,12215,12216,12217,12218,12219,12220,12221,12222,12223, 12224,12225,12226,12227,12228,12229,12230,12231,12232,12233,12234,12235, 12236,12237,12238,12239,12240,12241,12242,12243,12244,12245,12246,12247, 12248,12249,12250,12251,12252,12253,12254,12255,12256,12257,12258,12259, 12260,12261,12262,12263,12264,12265,12266,12267,12268,12269,12270,12271, 12272,12273,12274,12275,12276,12277,12278,12279,12280,12281,12282,12283, 12284,12285,12286,12287,12288,12289,12290,12291,12292,12293,12294,12295, 12296,12297,12298,12299,12300,12301,12302,12303,12304,12305,12306,12307, 12308,12309,12310,12311,12312,12313,12314,12315,12316,12317,12318,12319, 12320,12321,12322,12323,12324,12325,12326,12327,12328,12329,12330,12331, 12332,12333,12334,12335,12336,12337,12338,12339,12340,12341,12342,12343, 12344,12345,12346,12347,12348,12349,12350,12351,12352,12353,12354,12355, 12356,12357,12358,12359,12360,12361,12362,12363,12364,12365,12366,12367, 12368,12369,12370,12371,12372,12373,12374,12375,12376,12377,12378,12379, 12380,12381,12382,12383,12384,12385,12386,12387,12388,12389,12390,12391, 12392,12393,12394,12395,12396,12397,12398,12399,12400,12401,12402,12403, 12404,12405,12406,12407,12408,12409,12410,12411,12412,12413,12414,12415, 12416,12417,12418,12419,12420,12421,12422,12423,12424,12425,12426,12427, 12428,12429,12430,12431,12432,12433,12434,12435,12436,12437,12438,12439, 12440,12441,12442,12443,12444,12445,12446,12447,12448,12449,12450,12451, 12452,12453,12454,12455,12456,12457,12458,12459,12460,12461,12462,12463, 12464,12465,12466,12467,12468,12469,12470,12471,12472,12473,12474,12475, 12476,12477,12478,12479,12480,12481,12482,12483,12484,12485,12486,12487, 12488,12489,12490,12491,12492,12493,12494,12495,12496,12497,12498,12499, 12500,12501,12502,12503,12504,12505,12506,12507,12508,12509,12510,12511, 12512,12513,12514,12515,12516,12517,12518,12519,12520,12521,12522,12523, 12524,12525,12526,12527,12528,12529,12530,12531,12532,12533,12534,12535, 12536,12537,12538,12539,12540,12541,12542,12543,12544,12545,12546,12547, 12548,12549,12550,12551,12552,12553,12554,12555,12556,12557,12558,12559, 12560,12561,12562,12563,12564,12565,12566,12567,12568,12569,12570,12571, 12572,12573,12574,12575,12576,12577,12578,12579,12580,12581,12582,12583, 12584,12585,12586,12587,12588,12589,12590,12591,12592,12593,12594,12595, 12596,12597,12598,12599,12600,12601,12602,12603,12604,12605,12606,12607, 12608,12609,12610,12611,12612,12613,12614,12615,12616,12617,12618,12619, 12620,12621,12622,12623,12624,12625,12626,12627,12628,12629,12630,12631, 12632,12633,12634,12635,12636,12637,12638,12639,12640,12641,12642,12643, 12644,12645,12646,12647,12648,12649,12650,12651,12652,12653,12654,12655, 12656,12657,12658,12659,12660,12661,12662,12663,12664,12665,12666,12667, 12668,12669,12670,12671,12672,12673,12674,12675,12676,12677,12678,12679, 12680,12681,12682,12683,12684,12685,12686,12687,12688,12689,12690,12691, 12692,12693,12694,12695,12696,12697,12698,12699,12700,12701,12702,12703, 12704,12705,12706,12707,12708,12709,12710,12711,12712,12713,12714,12715, 12716,12717,12718,12719,12720,12721,12722,12723,12724,12725,12726,12727, 12728,12729,12730,12731,12732,12733,12734,12735,12736,12737,12738,12739, 12740,12741,12742,12743,12744,12745,12746,12747,12748,12749,12750,12751, 12752,12753,12754,12755,12756,12757,12758,12759,12760,12761,12762,12763, 12764,12765,12766,12767,12768,12769,12770,12771,12772,12773,12774,12775, 12776,12777,12778,12779,12780,12781,12782,12783,12784,12785,12786,12787, 12788,12789,12790,12791,12792,12793,12794,12795,12796,12797,12798,12799, 12800,12801,12802,12803,12804,12805,12806,12807,12808,12809,12810,12811, 12812,12813,12814,12815,12816,12817,12818,12819,12820,12821,12822,12823, 12824,12825,12826,12827,12828,12829,12830,12831,12832,12833,12834,12835, 12836,12837,12838,12839,12840,12841,12842,12843,12844,12845,12846,12847, 12848,12849,12850,12851,12852,12853,12854,12855,12856,12857,12858,12859, 12860,12861,12862,12863,12864,12865,12866,12867,12868,12869,12870,12871, 12872,12873,12874,12875,12876,12877,12878,12879,12880,12881,12882,12883, 12884,12885,12886,12887,12888,12889,12890,12891,12892,12893,12894,12895, 12896,12897,12898,12899,12900,12901,12902,12903,12904,12905,12906,12907, 12908,12909,12910,12911,12912,12913,12914,12915,12916,12917,12918,12919, 12920,12921,12922,12923,12924,12925,12926,12927,12928,12929,12930,12931, 12932,12933,12934,12935,12936,12937,12938,12939,12940,12941,12942,12943, 12944,12945,12946,12947,12948,12949,12950,12951,12952,12953,12954,12955, 12956,12957,12958,12959,12960,12961,12962,12963,12964,12965,12966,12967, 12968,12969,12970,12971,12972,12973,12974,12975,12976,12977,12978,12979, 12980,12981,12982,12983,12984,12985,12986,12987,12988,12989,12990,12991, 12992,12993,12994,12995,12996,12997,12998,12999,13000,13001,13002,13003, 13004,13005,13006,13007,13008,13009,13010,13011,13012,13013,13014,13015, 13016,13017,13018,13019,13020,13021,13022,13023,13024,13025,13026,13027, 13028,13029,13030,13031,13032,13033,13034,13035,13036,13037,13038,13039, 13040,13041,13042,13043,13044,13045,13046,13047,13048,13049,13050,13051, 13052,13053,13054,13055,13056,13057,13058,13059,13060,13061,13062,13063, 13064,13065,13066,13067,13068,13069,13070,13071,13072,13073,13074,13075, 13076,13077,13078,13079,13080,13081,13082,13083,13084,13085,13086,13087, 13088,13089,13090,13091,13092,13093,13094,13095,13096,13097,13098,13099, 13100,13101,13102,13103,13104,13105,13106,13107,13108,13109,13110,13111, 13112,13113,13114,13115,13116,13117,13118,13119,13120,13121,13122,13123, 13124,13125,13126,13127,13128,13129,13130,13131,13132,13133,13134,13135, 13136,13137,13138,13139,13140,13141,13142,13143,13144,13145,13146,13147, 13148,13149,13150,13151,13152,13153,13154,13155,13156,13157,13158,13159, 13160,13161,13162,13163,13164,13165,13166,13167,13168,13169,13170,13171, 13172,13173,13174,13175,13176,13177,13178,13179,13180,13181,13182,13183, 13184,13185,13186,13187,13188,13189,13190,13191,13192,13193,13194,13195, 13196,13197,13198,13199,13200,13201,13202,13203,13204,13205,13206,13207, 13208,13209,13210,13211,13212,13213,13214,13215,13216,13217,13218,13219, 13220,13221,13222,13223,13224,13225,13226,13227,13228,13229,13230,13231, 13232,13233,13234,13235,13236,13237,13238,13239,13240,13241,13242,13243, 13244,13245,13246,13247,13248,13249,13250,13251,13252,13253,13254,13255, 13256,13257,13258,13259,13260,13261,13262,13263,13264,13265,13266,13267, 13268,13269,13270,13271,13272,13273,13274,13275,13276,13277,13278,13279, 13280,13281,13282,13283,13284,13285,13286,13287,13288,13289,13290,13291, 13292,13293,13294,13295,13296,13297,13298,13299,13300,13301,13302,13303, 13304,13305,13306,13307,13308,13309,13310,13311,13312,13313,13314,13315, 13316,13317,13318,13319,13320,13321,13322,13323,13324,13325,13326,13327, 13328,13329,13330,13331,13332,13333,13334,13335,13336,13337,13338,13339, 13340,13341,13342,13343,13344,13345,13346,13347,13348,13349,13350,13351, 13352,13353,13354,13355,13356,13357,13358,13359,13360,13361,13362,13363, 13364,13365,13366,13367,13368,13369,13370,13371,13372,13373,13374,13375, 13376,13377,13378,13379,13380,13381,13382,13383,13384,13385,13386,13387, 13388,13389,13390,13391,13392,13393,13394,13395,13396,13397,13398,13399, 13400,13401,13402,13403,13404,13405,13406,13407,13408,13409,13410,13411, 13412,13413,13414,13415,13416,13417,13418,13419,13420,13421,13422,13423, 13424,13425,13426,13427,13428,13429,13430,13431,13432,13433,13434,13435, 13436,13437,13438,13439,13440,13441,13442,13443,13444,13445,13446,13447, 13448,13449,13450,13451,13452,13453,13454,13455,13456,13457,13458,13459, 13460,13461,13462,13463,13464,13465,13466,13467,13468,13469,13470,13471, 13472,13473,13474,13475,13476,13477,13478,13479,13480,13481,13482,13483, 13484,13485,13486,13487,13488,13489,13490,13491,13492,13493,13494,13495, 13496,13497,13498,13499,13500,13501,13502,13503,13504,13505,13506,13507, 13508,13509,13510,13511,13512,13513,13514,13515,13516,13517,13518,13519, 13520,13521,13522,13523,13524,13525,13526,13527,13528,13529,13530,13531, 13532,13533,13534,13535,13536,13537,13538,13539,13540,13541,13542,13543, 13544,13545,13546,13547,13548,13549,13550,13551,13552,13553,13554,13555, 13556,13557,13558,13559,13560,13561,13562,13563,13564,13565,13566,13567, 13568,13569,13570,13571,13572,13573,13574,13575,13576,13577,13578,13579, 13580,13581,13582,13583,13584,13585,13586,13587,13588,13589,13590,13591, 13592,13593,13594,13595,13596,13597,13598,13599,13600,13601,13602,13603, 13604,13605,13606,13607,13608,13609,13610,13611,13612,13613,13614,13615, 13616,13617,13618,13619,13620,13621,13622,13623,13624,13625,13626,13627, 13628,13629,13630,13631,13632,13633,13634,13635,13636,13637,13638,13639, 13640,13641,13642,13643,13644,13645,13646,13647,13648,13649,13650,13651, 13652,13653,13654,13655,13656,13657,13658,13659,13660,13661,13662,13663, 13664,13665,13666,13667,13668,13669,13670,13671,13672,13673,13674,13675, 13676,13677,13678,13679,13680,13681,13682,13683,13684,13685,13686,13687, 13688,13689,13690,13691,13692,13693,13694,13695,13696,13697,13698,13699, 13700,13701,13702,13703,13704,13705,13706,13707,13708,13709,13710,13711, 13712,13713,13714,13715,13716,13717,13718,13719,13720,13721,13722,13723, 13724,13725,13726,13727,13728,13729,13730,13731,13732,13733,13734,13735, 13736,13737,13738,13739,13740,13741,13742,13743,13744,13745,13746,13747, 13748,13749,13750,13751,13752,13753,13754,13755,13756,13757,13758,13759, 13760,13761,13762,13763,13764,13765,13766,13767,13768,13769,13770,13771, 13772,13773,13774,13775,13776,13777,13778,13779,13780,13781,13782,13783, 13784,13785,13786,13787,13788,13789,13790,13791,13792,13793,13794,13795, 13796,13797,13798,13799,13800,13801,13802,13803,13804,13805,13806,13807, 13808,13809,13810,13811,13812,13813,13814,13815,13816,13817,13818,13819, 13820,13821,13822,13823,13824,13825,13826,13827,13828,13829,13830,13831, 13832,13833,13834,13835,13836,13837,13838,13839,13840,13841,13842,13843, 13844,13845,13846,13847,13848,13849,13850,13851,13852,13853,13854,13855, 13856,13857,13858,13859,13860,13861,13862,13863,13864,13865,13866,13867, 13868,13869,13870,13871,13872,13873,13874,13875,13876,13877,13878,13879, 13880,13881,13882,13883,13884,13885,13886,13887,13888,13889,13890,13891, 13892,13893,13894,13895,13896,13897,13898,13899,13900,13901,13902,13903, 13904,13905,13906,13907,13908,13909,13910,13911,13912,13913,13914,13915, 13916,13917,13918,13919,13920,13921,13922,13923,13924,13925,13926,13927, 13928,13929,13930,13931,13932,13933,13934,13935,13936,13937,13938,13939, 13940,13941,13942,13943,13944,13945,13946,13947,13948,13949,13950,13951, 13952,13953,13954,13955,13956,13957,13958,13959,13960,13961,13962,13963, 13964,13965,13966,13967,13968,13969,13970,13971,13972,13973,13974,13975, 13976,13977,13978,13979,13980,13981,13982,13983,13984,13985,13986,13987, 13988,13989,13990,13991,13992,13993,13994,13995,13996,13997,13998,13999, 14000,14001,14002,14003,14004,14005,14006,14007,14008,14009,14010,14011, 14012,14013,14014,14015,14016,14017,14018,14019,14020,14021,14022,14023, 14024,14025,14026,14027,14028,14029,14030,14031,14032,14033,14034,14035, 14036,14037,14038,14039,14040,14041,14042,14043,14044,14045,14046,14047, 14048,14049,14050,14051,14052,14053,14054,14055,14056,14057,14058,14059, 14060,14061,14062,14063,14064,14065,14066,14067,14068,14069,14070,14071, 14072,14073,14074,14075,14076,14077,14078,14079,14080,14081,14082,14083, 14084,14085,14086,14087,14088,14089,14090,14091,14092,14093,14094,14095, 14096,14097,14098,14099,14100,14101,14102,14103,14104,14105,14106,14107, 14108,14109,14110,14111,14112,14113,14114,14115,14116,14117,14118,14119, 14120,14121,14122,14123,14124,14125,14126,14127,14128,14129,14130,14131, 14132,14133,14134,14135,14136,14137,14138,14139,14140,14141,14142,14143, 14144,14145,14146,14147,14148,14149,14150,14151,14152,14153,14154,14155, 14156,14157,14158,14159,14160,14161,14162,14163,14164,14165,14166,14167, 14168,14169,14170,14171,14172,14173,14174,14175,14176,14177,14178,14179, 14180,14181,14182,14183,14184,14185,14186,14187,14188,14189,14190,14191, 14192,14193,14194,14195,14196,14197,14198,14199,14200,14201,14202,14203, 14204,14205,14206,14207,14208,14209,14210,14211,14212,14213,14214,14215, 14216,14217,14218,14219,14220,14221,14222,14223,14224,14225,14226,14227, 14228,14229,14230,14231,14232,14233,14234,14235,14236,14237,14238,14239, 14240,14241,14242,14243,14244,14245,14246,14247,14248,14249,14250,14251, 14252,14253,14254,14255,14256,14257,14258,14259,14260,14261,14262,14263, 14264,14265,14266,14267,14268,14269,14270,14271,14272,14273,14274,14275, 14276,14277,14278,14279,14280,14281,14282,14283,14284,14285,14286,14287, 14288,14289,14290,14291,14292,14293,14294,14295,14296,14297,14298,14299, 14300,14301,14302,14303,14304,14305,14306,14307,14308,14309,14310,14311, 14312,14313,14314,14315,14316,14317,14318,14319,14320,14321,14322,14323, 14324,14325,14326,14327,14328,14329,14330,14331,14332,14333,14334,14335, 14336,14337,14338,14339,14340,14341,14342,14343,14344,14345,14346,14347, 14348,14349,14350,14351,14352,14353,14354,14355,14356,14357,14358,14359, 14360,14361,14362,14363,14364,14365,14366,14367,14368,14369,14370,14371, 14372,14373,14374,14375,14376,14377,14378,14379,14380,14381,14382,14383, 14384,14385,14386,14387,14388,14389,14390,14391,14392,14393,14394,14395, 14396,14397,14398,14399,14400,14401,14402,14403,14404,14405,14406,14407, 14408,14409,14410,14411,14412,14413,14414,14415,14416,14417,14418,14419, 14420,14421,14422,14423,14424,14425,14426,14427,14428,14429,14430,14431, 14432,14433,14434,14435,14436,14437,14438,14439,14440,14441,14442,14443, 14444,14445,14446,14447,14448,14449,14450,14451,14452,14453,14454,14455, 14456,14457,14458,14459,14460,14461,14462,14463,14464,14465,14466,14467, 14468,14469,14470,14471,14472,14473,14474,14475,14476,14477,14478,14479, 14480,14481,14482,14483,14484,14485,14486,14487,14488,14489,14490,14491, 14492,14493,14494,14495,14496,14497,14498,14499,14500,14501,14502,14503, 14504,14505,14506,14507,14508,14509,14510,14511,14512,14513,14514,14515, 14516,14517,14518,14519,14520,14521,14522,14523,14524,14525,14526,14527, 14528,14529,14530,14531,14532,14533,14534,14535,14536,14537,14538,14539, 14540,14541,14542,14543,14544,14545,14546,14547,14548,14549,14550,14551, 14552,14553,14554,14555,14556,14557,14558,14559,14560,14561,14562,14563, 14564,14565,14566,14567,14568,14569,14570,14571,14572,14573,14574,14575, 14576,14577,14578,14579,14580,14581,14582,14583,14584,14585,14586,14587, 14588,14589,14590,14591,14592,14593,14594,14595,14596,14597,14598,14599, 14600,14601,14602,14603,14604,14605,14606,14607,14608,14609,14610,14611, 14612,14613,14614,14615,14616,14617,14618,14619,14620,14621,14622,14623, 14624,14625,14626,14627,14628,14629,14630,14631,14632,14633,14634,14635, 14636,14637,14638,14639,14640,14641,14642,14643,14644,14645,14646,14647, 14648,14649,14650,14651,14652,14653,14654,14655,14656,14657,14658,14659, 14660,14661,14662,14663,14664,14665,14666,14667,14668,14669,14670,14671, 14672,14673,14674,14675,14676,14677,14678,14679,14680,14681,14682,14683, 14684,14685,14686,14687,14688,14689,14690,14691,14692,14693,14694,14695, 14696,14697,14698,14699,14700,14701,14702,14703,14704,14705,14706,14707, 14708,14709,14710,14711,14712,14713,14714,14715,14716,14717,14718,14719, 14720,14721,14722,14723,14724,14725,14726,14727,14728,14729,14730,14731, 14732,14733,14734,14735,14736,14737,14738,14739,14740,14741,14742,14743, 14744,14745,14746,14747,14748,14749,14750,14751,14752,14753,14754,14755, 14756,14757,14758,14759,14760,14761,14762,14763,14764,14765,14766,14767, 14768,14769,14770,14771,14772,14773,14774,14775,14776,14777,14778,14779, 14780,14781,14782,14783,14784,14785,14786,14787,14788,14789,14790,14791, 14792,14793,14794,14795,14796,14797,14798,14799,14800,14801,14802,14803, 14804,14805,14806,14807,14808,14809,14810,14811,14812,14813,14814,14815, 14816,14817,14818,14819,14820,14821,14822,14823,14824,14825,14826,14827, 14828,14829,14830,14831,14832,14833,14834,14835,14836,14837,14838,14839, 14840,14841,14842,14843,14844,14845,14846,14847,14848,14849,14850,14851, 14852,14853,14854,14855,14856,14857,14858,14859,14860,14861,14862,14863, 14864,14865,14866,14867,14868,14869,14870,14871,14872,14873,14874,14875, 14876,14877,14878,14879,14880,14881,14882,14883,14884,14885,14886,14887, 14888,14889,14890,14891,14892,14893,14894,14895,14896,14897,14898,14899, 14900,14901,14902,14903,14904,14905,14906,14907,14908,14909,14910,14911, 14912,14913,14914,14915,14916,14917,14918,14919,14920,14921,14922,14923, 14924,14925,14926,14927,14928,14929,14930,14931,14932,14933,14934,14935, 14936,14937,14938,14939,14940,14941,14942,14943,14944,14945,14946,14947, 14948,14949,14950,14951,14952,14953,14954,14955,14956,14957,14958,14959, 14960,14961,14962,14963,14964,14965,14966,14967,14968,14969,14970,14971, 14972,14973,14974,14975,14976,14977,14978,14979,14980,14981,14982,14983, 14984,14985,14986,14987,14988,14989,14990,14991,14992,14993,14994,14995, 14996,14997,14998,14999,15000,15001,15002,15003,15004,15005,15006,15007, 15008,15009,15010,15011,15012,15013,15014,15015,15016,15017,15018,15019, 15020,15021,15022,15023,15024,15025,15026,15027,15028,15029,15030,15031, 15032,15033,15034,15035,15036,15037,15038,15039,15040,15041,15042,15043, 15044,15045,15046,15047,15048,15049,15050,15051,15052,15053,15054,15055, 15056,15057,15058,15059,15060,15061,15062,15063,15064,15065,15066,15067, 15068,15069,15070,15071,15072,15073,15074,15075,15076,15077,15078,15079, 15080,15081,15082,15083,15084,15085,15086,15087,15088,15089,15090,15091, 15092,15093,15094,15095,15096,15097,15098,15099,15100,15101,15102,15103, 15104,15105,15106,15107,15108,15109,15110,15111,15112,15113,15114,15115, 15116,15117,15118,15119,15120,15121,15122,15123,15124,15125,15126,15127, 15128,15129,15130,15131,15132,15133,15134,15135,15136,15137,15138,15139, 15140,15141,15142,15143,15144,15145,15146,15147,15148,15149,15150,15151, 15152,15153,15154,15155,15156,15157,15158,15159,15160,15161,15162,15163, 15164,15165,15166,15167,15168,15169,15170,15171,15172,15173,15174,15175, 15176,15177,15178,15179,15180,15181,15182,15183,15184,15185,15186,15187, 15188,15189,15190,15191,15192,15193,15194,15195,15196,15197,15198,15199, 15200,15201,15202,15203,15204,15205,15206,15207,15208,15209,15210,15211, 15212,15213,15214,15215,15216,15217,15218,15219,15220,15221,15222,15223, 15224,15225,15226,15227,15228,15229,15230,15231,15232,15233,15234,15235, 15236,15237,15238,15239,15240,15241,15242,15243,15244,15245,15246,15247, 15248,15249,15250,15251,15252,15253,15254,15255,15256,15257,15258,15259, 15260,15261,15262,15263,15264,15265,15266,15267,15268,15269,15270,15271, 15272,15273,15274,15275,15276,15277,15278,15279,15280,15281,15282,15283, 15284,15285,15286,15287,15288,15289,15290,15291,15292,15293,15294,15295, 15296,15297,15298,15299,15300,15301,15302,15303,15304,15305,15306,15307, 15308,15309,15310,15311,15312,15313,15314,15315,15316,15317,15318,15319, 15320,15321,15322,15323,15324,15325,15326,15327,15328,15329,15330,15331, 15332,15333,15334,15335,15336,15337,15338,15339,15340,15341,15342,15343, 15344,15345,15346,15347,15348,15349,15350,15351,15352,15353,15354,15355, 15356,15357,15358,15359,15360,15361,15362,15363,15364,15365,15366,15367, 15368,15369,15370,15371,15372,15373,15374,15375,15376,15377,15378,15379, 15380,15381,15382,15383,15384,15385,15386,15387,15388,15389,15390,15391, 15392,15393,15394,15395,15396,15397,15398,15399,15400,15401,15402,15403, 15404,15405,15406,15407,15408,15409,15410,15411,15412,15413,15414,15415, 15416,15417,15418,15419,15420,15421,15422,15423,15424,15425,15426,15427, 15428,15429,15430,15431,15432,15433,15434,15435,15436,15437,15438,15439, 15440,15441,15442,15443,15444,15445,15446,15447,15448,15449,15450,15451, 15452,15453,15454,15455,15456,15457,15458,15459,15460,15461,15462,15463, 15464,15465,15466,15467,15468,15469,15470,15471,15472,15473,15474,15475, 15476,15477,15478,15479,15480,15481,15482,15483,15484,15485,15486,15487, 15488,15489,15490,15491,15492,15493,15494,15495,15496,15497,15498,15499, 15500,15501,15502,15503,15504,15505,15506,15507,15508,15509,15510,15511, 15512,15513,15514,15515,15516,15517,15518,15519,15520,15521,15522,15523, 15524,15525,15526,15527,15528,15529,15530,15531,15532,15533,15534,15535, 15536,15537,15538,15539,15540,15541,15542,15543,15544,15545,15546,15547, 15548,15549,15550,15551,15552,15553,15554,15555,15556,15557,15558,15559, 15560,15561,15562,15563,15564,15565,15566,15567,15568,15569,15570,15571, 15572,15573,15574,15575,15576,15577,15578,15579,15580,15581,15582,15583, 15584,15585,15586,15587,15588,15589,15590,15591,15592,15593,15594,15595, 15596,15597,15598,15599,15600,15601,15602,15603,15604,15605,15606,15607, 15608,15609,15610,15611,15612,15613,15614,15615,15616,15617,15618,15619, 15620,15621,15622,15623,15624,15625,15626,15627,15628,15629,15630,15631, 15632,15633,15634,15635,15636,15637,15638,15639,15640,15641,15642,15643, 15644,15645,15646,15647,15648,15649,15650,15651,15652,15653,15654,15655, 15656,15657,15658,15659,15660,15661,15662,15663,15664,15665,15666,15667, 15668,15669,15670,15671,15672,15673,15674,15675,15676,15677,15678,15679, 15680,15681,15682,15683,15684,15685,15686,15687,15688,15689,15690,15691, 15692,15693,15694,15695,15696,15697,15698,15699,15700,15701,15702,15703, 15704,15705,15706,15707,15708,15709,15710,15711,15712,15713,15714,15715, 15716,15717,15718,15719,15720,15721,15722,15723,15724,15725,15726,15727, 15728,15729,15730,15731,15732,15733,15734,15735,15736,15737,15738,15739, 15740,15741,15742,15743,15744,15745,15746,15747,15748,15749,15750,15751, 15752,15753,15754,15755,15756,15757,15758,15759,15760,15761,15762,15763, 15764,15765,15766,15767,15768,15769,15770,15771,15772,15773,15774,15775, 15776,15777,15778,15779,15780,15781,15782,15783,15784,15785,15786,15787, 15788,15789,15790,15791,15792,15793,15794,15795,15796,15797,15798,15799, 15800,15801,15802,15803,15804,15805,15806,15807,15808,15809,15810,15811, 15812,15813,15814,15815,15816,15817,15818,15819,15820,15821,15822,15823, 15824,15825,15826,15827,15828,15829,15830,15831,15832,15833,15834,15835, 15836,15837,15838,15839,15840,15841,15842,15843,15844,15845,15846,15847, 15848,15849,15850,15851,15852,15853,15854,15855,15856,15857,15858,15859, 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17888,17889,17890,17891,17892,17893,17894,17895,17896,17897,17898,17899, 17900,17901,17902,17903,17904,17905,17906,17907,17908,17909,17910,17911, 17912,17913,17914,17915,17916,17917,17918,17919,17920,17921,17922,17923, 17924,17925,17926,17927,17928,17929,17930,17931,17932,17933,17934,17935, 17936,17937,17938,17939,17940,17941,17942,17943,17944,17945,17946,17947, 17948,17949,17950,17951,17952,17953,17954,17955,17956,17957,17958,17959, 17960,17961,17962,17963,17964,17965,17966,17967,17968,17969,17970,17971, 17972,17973,17974,17975,17976,17977,17978,17979,17980,17981,17982,17983, 17984,17985,17986,17987,17988,17989,17990,17991,17992,17993,17994,17995, 17996,17997,17998,17999,18000,18001,18002,18003,18004,18005,18006,18007, 18008,18009,18010,18011,18012,18013,18014,18015,18016,18017,18018,18019, 18020,18021,18022,18023,18024,18025,18026,18027,18028,18029,18030,18031, 18032,18033,18034,18035,18036,18037,18038,18039,18040,18041,18042,18043, 18044,18045,18046,18047,18048,18049,18050,18051,18052,18053,18054,18055, 18056,18057,18058,18059,18060,18061,18062,18063,18064,18065,18066,18067, 18068,18069,18070,18071,18072,18073,18074,18075,18076,18077,18078,18079, 18080,18081,18082,18083,18084,18085,18086,18087,18088,18089,18090,18091, 18092,18093,18094,18095,18096,18097,18098,18099,18100,18101,18102,18103, 18104,18105,18106,18107,18108,18109,18110,18111,18112,18113,18114,18115, 18116,18117,18118,18119,18120,18121,18122,18123,18124,18125,18126,18127, 18128,18129,18130,18131,18132,18133,18134,18135,18136,18137,18138,18139, 18140,18141,18142,18143,18144,18145,18146,18147,18148,18149,18150,18151, 18152,18153,18154,18155,18156,18157,18158,18159,18160,18161,18162,18163, 18164,18165,18166,18167,18168,18169,18170,18171,18172,18173,18174,18175, 18176,18177,18178,18179,18180,18181,18182,18183,18184,18185,18186,18187, 18188,18189,18190,18191,18192,18193,18194,18195,18196,18197,18198,18199, 18200,18201,18202,18203,18204,18205,18206,18207,18208,18209,18210,18211, 18212,18213,18214,18215,18216,18217,18218,18219,18220,18221,18222,18223, 18224,18225,18226,18227,18228,18229,18230,18231,18232,18233,18234,18235, 18236,18237,18238,18239,18240,18241,18242,18243,18244,18245,18246,18247, 18248,18249,18250,18251,18252,18253,18254,18255,18256,18257,18258,18259, 18260,18261,18262,18263,18264,18265,18266,18267,18268,18269,18270,18271, 18272,18273,18274,18275,18276,18277,18278,18279,18280,18281,18282,18283, 18284,18285,18286,18287,18288,18289,18290,18291,18292,18293,18294,18295, 18296,18297,18298,18299,18300,18301,18302,18303,18304,18305,18306,18307, 18308,18309,18310,18311,18312,18313,18314,18315,18316,18317,18318,18319, 18320,18321,18322,18323,18324,18325,18326,18327,18328,18329,18330,18331, 18332,18333,18334,18335,18336,18337,18338,18339,18340,18341,18342,18343, 18344,18345,18346,18347,18348,18349,18350,18351,18352,18353,18354,18355, 18356,18357,18358,18359,18360,18361,18362,18363,18364,18365,18366,18367, 18368,18369,18370,18371,18372,18373,18374,18375,18376,18377,18378,18379, 18380,18381,18382,18383,18384,18385,18386,18387,18388,18389,18390,18391, 18392,18393,18394,18395,18396,18397,18398,18399,18400,18401,18402,18403, 18404,18405,18406,18407,18408,18409,18410,18411,18412,18413,18414,18415, 18416,18417,18418,18419,18420,18421,18422,18423,18424,18425,18426,18427, 18428,18429,18430,18431,18432,18433,18434,18435,18436,18437,18438,18439, 18440,18441,18442,18443,18444,18445,18446,18447,18448,18449,18450,18451, 18452,18453,18454,18455,18456,18457,18458,18459,18460,18461,18462,18463, 18464,18465,18466,18467,18468,18469,18470,18471,18472,18473,18474,18475, 18476,18477,18478,18479,18480,18481,18482,18483,18484,18485,18486,18487, 18488,18489,18490,18491,18492,18493,18494,18495,18496,18497,18498,18499, 18500,18501,18502,18503,18504,18505,18506,18507,18508,18509,18510,18511, 18512,18513,18514,18515,18516,18517,18518,18519,18520,18521,18522,18523, 18524,18525,18526,18527,18528,18529,18530,18531,18532,18533,18534,18535, 18536,18537,18538,18539,18540,18541,18542,18543,18544,18545,18546,18547, 18548,18549,18550,18551,18552,18553,18554,18555,18556,18557,18558,18559, 18560,18561,18562,18563,18564,18565,18566,18567,18568,18569,18570,18571, 18572,18573,18574,18575,18576,18577,18578,18579,18580,18581,18582,18583, 18584,18585,18586,18587,18588,18589,18590,18591,18592,18593,18594,18595, 18596,18597,18598,18599,18600,18601,18602,18603,18604,18605,18606,18607, 18608,18609,18610,18611,18612,18613,18614,18615,18616,18617,18618,18619, 18620,18621,18622,18623,18624,18625,18626,18627,18628,18629,18630,18631, 18632,18633,18634,18635,18636,18637,18638,18639,18640,18641,18642,18643, 18644,18645,18646,18647,18648,18649,18650,18651,18652,18653,18654,18655, 18656,18657,18658,18659,18660,18661,18662,18663,18664,18665,18666,18667, 18668,18669,18670,18671,18672,18673,18674,18675,18676,18677,18678,18679, 18680,18681,18682,18683,18684,18685,18686,18687,18688,18689,18690,18691, 18692,18693,18694,18695,18696,18697,18698,18699,18700,18701,18702,18703, 18704,18705,18706,18707,18708,18709,18710,18711,18712,18713,18714,18715, 18716,18717,18718,18719,18720,18721,18722,18723,18724,18725,18726,18727, 18728,18729,18730,18731,18732,18733,18734,18735,18736,18737,18738,18739, 18740,18741,18742,18743,18744,18745,18746,18747,18748,18749,18750,18751, 18752,18753,18754,18755,18756,18757,18758,18759,18760,18761,18762,18763, 18764,18765,18766,18767,18768,18769,18770,18771,18772,18773,18774,18775, 18776,18777,18778,18779,18780,18781,18782,18783,18784,18785,18786,18787, 18788,18789,18790,18791,18792,18793,18794,18795,18796,18797,18798,18799, 18800,18801,18802,18803,18804,18805,18806,18807,18808,18809,18810,18811, 18812,18813,18814,18815,18816,18817,18818,18819,18820,18821,18822,18823, 18824,18825,18826,18827,18828,18829,18830,18831,18832,18833,18834,18835, 18836,18837,18838,18839,18840,18841,18842,18843,18844,18845,18846,18847, 18848,18849,18850,18851,18852,18853,18854,18855,18856,18857,18858,18859, 18860,18861,18862,18863,18864,18865,18866,18867,18868,18869,18870,18871, 18872,18873,18874,18875,18876,18877,18878,18879,18880,18881,18882,18883, 18884,18885,18886,18887,18888,18889,18890,18891,18892,18893,18894,18895, 18896,18897,18898,18899,18900,18901,18902,18903,18904,18905,18906,18907, 18908,18909,18910,18911,18912,18913,18914,18915,18916,18917,18918,18919, 18920,18921,18922,18923,18924,18925,18926,18927,18928,18929,18930,18931, 18932,18933,18934,18935,18936,18937,18938,18939,18940,18941,18942,18943, 18944,18945,18946,18947,18948,18949,18950,18951,18952,18953,18954,18955, 18956,18957,18958,18959,18960,18961,18962,18963,18964,18965,18966,18967, 18968,18969,18970,18971,18972,18973,18974,18975,18976,18977,18978,18979, 18980,18981,18982,18983,18984,18985,18986,18987,18988,18989,18990,18991, 18992,18993,18994,18995,18996,18997,18998,18999,19000,19001,19002,19003, 19004,19005,19006,19007,19008,19009,19010,19011,19012,19013,19014,19015, 19016,19017,19018,19019,19020,19021,19022,19023,19024,19025,19026,19027, 19028,19029,19030,19031,19032,19033,19034,19035,19036,19037,19038,19039, 19040,19041,19042,19043,19044,19045,19046,19047,19048,19049,19050,19051, 19052,19053,19054,19055,19056,19057,19058,19059,19060,19061,19062,19063, 19064,19065,19066,19067,19068,19069,19070,19071,19072,19073,19074,19075, 19076,19077,19078,19079,19080,19081,19082,19083,19084,19085,19086,19087, 19088,19089,19090,19091,19092,19093,19094,19095,19096,19097,19098,19099, 19100,19101,19102,19103,19104,19105,19106,19107,19108,19109,19110,19111, 19112,19113,19114,19115,19116,19117,19118,19119,19120,19121,19122,19123, 19124,19125,19126,19127,19128,19129,19130,19131,19132,19133,19134,19135, 19136,19137,19138,19139,19140,19141,19142,19143,19144,19145,19146,19147, 19148,19149,19150,19151,19152,19153,19154,19155,19156,19157,19158,19159, 19160,19161,19162,19163,19164,19165,19166,19167,19168,19169,19170,19171, 19172,19173,19174,19175,19176,19177,19178,19179,19180,19181,19182,19183, 19184,19185,19186,19187,19188,19189,19190,19191,19192,19193,19194,19195, 19196,19197,19198,19199,19200,19201,19202,19203,19204,19205,19206,19207, 19208,19209,19210,19211,19212,19213,19214,19215,19216,19217,19218,19219, 19220,19221,19222,19223,19224,19225,19226,19227,19228,19229,19230,19231, 19232,19233,19234,19235,19236,19237,19238,19239,19240,19241,19242,19243, 19244,19245,19246,19247,19248,19249,19250,19251,19252,19253,19254,19255, 19256,19257,19258,19259,19260,19261,19262,19263,19264,19265,19266,19267, 19268,19269,19270,19271,19272,19273,19274,19275,19276,19277,19278,19279, 19280,19281,19282,19283,19284,19285,19286,19287,19288,19289,19290,19291, 19292,19293,19294,19295,19296,19297,19298,19299,19300,19301,19302,19303, 19304,19305,19306,19307,19308,19309,19310,19311,19312,19313,19314,19315, 19316,19317,19318,19319,19320,19321,19322,19323,19324,19325,19326,19327, 19328,19329,19330,19331,19332,19333,19334,19335,19336,19337,19338,19339, 19340,19341,19342,19343,19344,19345,19346,19347,19348,19349,19350,19351, 19352,19353,19354,19355,19356,19357,19358,19359,19360,19361,19362,19363, 19364,19365,19366,19367,19368,19369,19370,19371,19372,19373,19374,19375, 19376,19377,19378,19379,19380,19381,19382,19383,19384,19385,19386,19387, 19388,19389,19390,19391,19392,19393,19394,19395,19396,19397,19398,19399, 19400,19401,19402,19403,19404,19405,19406,19407,19408,19409,19410,19411, 19412,19413,19414,19415,19416,19417,19418,19419,19420,19421,19422,19423, 19424,19425,19426,19427,19428,19429,19430,19431,19432,19433,19434,19435, 19436,19437,19438,19439,19440,19441,19442,19443,19444,19445,19446,19447, 19448,19449,19450,19451,19452,19453,19454,19455,19456,19457,19458,19459, 19460,19461,19462,19463,19464,19465,19466,19467,19468,19469,19470,19471, 19472,19473,19474,19475,19476,19477,19478,19479,19480,19481,19482,19483, 19484,19485,19486,19487,19488,19489,19490,19491,19492,19493,19494,19495, 19496,19497,19498,19499,19500,19501,19502,19503,19504,19505,19506,19507, 19508,19509,19510,19511,19512,19513,19514,19515,19516,19517,19518,19519, 19520,19521,19522,19523,19524,19525,19526,19527,19528,19529,19530,19531, 19532,19533,19534,19535,19536,19537,19538,19539,19540,19541,19542,19543, 19544,19545,19546,19547,19548,19549,19550,19551,19552,19553,19554,19555, 19556,19557,19558,19559,19560,19561,19562,19563,19564,19565,19566,19567, 19568,19569,19570,19571,19572,19573,19574,19575,19576,19577,19578,19579, 19580,19581,19582,19583,19584,19585,19586,19587,19588,19589,19590,19591, 19592,19593,19594,19595,19596,19597,19598,19599,19600,19601,19602,19603, 19604,19605,19606,19607,19608,19609,19610,19611,19612,19613,19614,19615, 19616,19617,19618,19619,19620,19621,19622,19623,19624,19625,19626,19627, 19628,19629,19630,19631,19632,19633,19634,19635,19636,19637,19638,19639, 19640,19641,19642,19643,19644,19645,19646,19647,19648,19649,19650,19651, 19652,19653,19654,19655,19656,19657,19658,19659,19660,19661,19662,19663, 19664,19665,19666,19667,19668,19669,19670,19671,19672,19673,19674,19675, 19676,19677,19678,19679,19680,19681,19682,19683,19684,19685,19686,19687, 19688,19689,19690,19691,19692,19693,19694,19695,19696,19697,19698,19699, 19700,19701,19702,19703,19704,19705,19706,19707,19708,19709,19710,19711, 19712,19713,19714,19715,19716,19717,19718,19719,19720,19721,19722,19723, 19724,19725,19726,19727,19728,19729,19730,19731,19732,19733,19734,19735, 19736,19737,19738,19739,19740,19741,19742,19743,19744,19745,19746,19747, 19748,19749,19750,19751,19752,19753,19754,19755,19756,19757,19758,19759, 19760,19761,19762,19763,19764,19765,19766,19767,19768,19769,19770,19771, 19772,19773,19774,19775,19776,19777,19778,19779,19780,19781,19782,19783, 19784,19785,19786,19787,19788,19789,19790,19791,19792,19793,19794,19795, 19796,19797,19798,19799,19800,19801,19802,19803,19804,19805,19806,19807, 19808,19809,19810,19811,19812,19813,19814,19815,19816,19817,19818,19819, 19820,19821,19822,19823,19824,19825,19826,19827,19828,19829,19830,19831, 19832,19833,19834,19835,19836,19837,19838,19839,19840,19841,19842,19843, 19844,19845,19846,19847,19848,19849,19850,19851,19852,19853,19854,19855, 19856,19857,19858,19859,19860,19861,19862,19863,19864,19865,19866,19867, 19868,19869,19870,19871,19872,19873,19874,19875,19876,19877,19878,19879, 19880,19881,19882,19883,19884,19885,19886,19887,19888,19889,19890,19891, 19892,19893,19894,19895,19896,19897,19898,19899,19900,19901,19902,19903, 19904,19905,19906,19907,19908,19909,19910,19911,19912,19913,19914,19915, 19916,19917,19918,19919,19920,19921,19922,19923,19924,19925,19926,19927, 19928,19929,19930,19931,19932,19933,19934,19935,19936,19937,19938,19939, 19940,19941,19942,19943,19944,19945,19946,19947,19948,19949,19950,19951, 19952,19953,19954,19955,19956,19957,19958,19959,19960,19961,19962,19963, 19964,19965,19966,19967,19968,19969,19970,19971,19972,19973,19974,19975, 19976,19977,19978,19979,19980,19981,19982,19983,19984,19985,19986,19987, 19988,19989,19990,19991,19992,19993,19994,19995,19996,19997,19998,19999, 20000,20001,20002,20003,20004,20005,20006,20007,20008,20009,20010,20011, 20012,20013,20014,20015,20016,20017,20018,20019,20020,20021,20022,20023, 20024,20025,20026,20027,20028,20029,20030,20031,20032,20033,20034,20035, 20036,20037,20038,20039,20040,20041,20042,20043,20044,20045,20046,20047, 20048,20049,20050,20051,20052,20053,20054,20055,20056,20057,20058,20059, 20060,20061,20062,20063,20064,20065,20066,20067,20068,20069,20070,20071, 20072,20073,20074,20075,20076,20077,20078,20079,20080,20081,20082,20083, 20084,20085,20086,20087,20088,20089,20090,20091,20092,20093,20094,20095, 20096,20097,20098,20099,20100,20101,20102,20103,20104,20105,20106,20107, 20108,20109,20110,20111,20112,20113,20114,20115,20116,20117,20118,20119, 20120,20121,20122,20123,20124,20125,20126,20127,20128,20129,20130,20131, 20132,20133,20134,20135,20136,20137,20138,20139,20140,20141,20142,20143, 20144,20145,20146,20147,20148,20149,20150,20151,20152,20153,20154,20155, 20156,20157,20158,20159,20160,20161,20162,20163,20164,20165,20166,20167, 20168,20169,20170,20171,20172,20173,20174,20175,20176,20177,20178,20179, 20180,20181,20182,20183,20184,20185,20186,20187,20188,20189,20190,20191, 20192,20193,20194,20195,20196,20197,20198,20199,20200,20201,20202,20203, 20204,20205,20206,20207,20208,20209,20210,20211,20212,20213,20214,20215, 20216,20217,20218,20219,20220,20221,20222,20223,20224,20225,20226,20227, 20228,20229,20230,20231,20232,20233,20234,20235,20236,20237,20238,20239, 20240,20241,20242,20243,20244,20245,20246,20247,20248,20249,20250,20251, 20252,20253,20254,20255,20256,20257,20258,20259,20260,20261,20262,20263, 20264,20265,20266,20267,20268,20269,20270,20271,20272,20273,20274,20275, 20276,20277,20278,20279,20280,20281,20282,20283,20284,20285,20286,20287, 20288,20289,20290,20291,20292,20293,20294,20295,20296,20297,20298,20299, 20300,20301,20302,20303,20304,20305,20306,20307,20308,20309,20310,20311, 20312,20313,20314,20315,20316,20317,20318,20319,20320,20321,20322,20323, 20324,20325,20326,20327,20328,20329,20330,20331,20332,20333,20334,20335, 20336,20337,20338,20339,20340,20341,20342,20343,20344,20345,20346,20347, 20348,20349,20350,20351,20352,20353,20354,20355,20356,20357,20358,20359, 20360,20361,20362,20363,20364,20365,20366,20367,20368,20369,20370,20371, 20372,20373,20374,20375,20376,20377,20378,20379,20380,20381,20382,20383, 20384,20385,20386,20387,20388,20389,20390,20391,20392,20393,20394,20395, 20396,20397,20398,20399,20400,20401,20402,20403,20404,20405,20406,20407, 20408,20409,20410,20411,20412,20413,20414,20415,20416,20417,20418,20419, 20420,20421,20422,20423,20424,20425,20426,20427,20428,20429,20430,20431, 20432,20433,20434,20435,20436,20437,20438,20439,20440,20441,20442,20443, 20444,20445,20446,20447,20448,20449,20450,20451,20452,20453,20454,20455, 20456,20457,20458,20459,20460,20461,20462,20463,20464,20465,20466,20467, 20468,20469,20470,20471,20472,20473,20474,20475,20476,20477,20478,20479, 20480,20481,20482,20483,20484,20485,20486,20487,20488,20489,20490,20491, 20492,20493,20494,20495,20496,20497,20498,20499,20500,20501,20502,20503, 20504,20505,20506,20507,20508,20509,20510,20511,20512,20513,20514,20515, 20516,20517,20518,20519,20520,20521,20522,20523,20524,20525,20526,20527, 20528,20529,20530,20531,20532,20533,20534,20535,20536,20537,20538,20539, 20540,20541,20542,20543,20544,20545,20546,20547,20548,20549,20550,20551, 20552,20553,20554,20555,20556,20557,20558,20559,20560,20561,20562,20563, 20564,20565,20566,20567,20568,20569,20570,20571,20572,20573,20574,20575, 20576,20577,20578,20579,20580,20581,20582,20583,20584,20585,20586,20587, 20588,20589,20590,20591,20592,20593,20594,20595,20596,20597,20598,20599, 20600,20601,20602,20603,20604,20605,20606,20607,20608,20609,20610,20611, 20612,20613,20614,20615,20616,20617,20618,20619,20620,20621,20622,20623, 20624,20625,20626,20627,20628,20629,20630,20631,20632,20633,20634,20635, 20636,20637,20638,20639,20640,20641,20642,20643,20644,20645,20646,20647, 20648,20649,20650,20651,20652,20653,20654,20655,20656,20657,20658,20659, 20660,20661,20662,20663,20664,20665,20666,20667,20668,20669,20670,20671, 20672,20673,20674,20675,20676,20677,20678,20679,20680,20681,20682,20683, 20684,20685,20686,20687,20688,20689,20690,20691,20692,20693,20694,20695, 20696,20697,20698,20699,20700,20701,20702,20703,20704,20705,20706,20707, 20708,20709,20710,20711,20712,20713,20714,20715,20716,20717,20718,20719, 20720,20721,20722,20723,20724,20725,20726,20727,20728,20729,20730,20731, 20732,20733,20734,20735,20736,20737,20738,20739,20740,20741,20742,20743, 20744,20745,20746,20747,20748,20749,20750,20751,20752,20753,20754,20755, 20756,20757,20758,20759,20760,20761,20762,20763,20764,20765,20766,20767, 20768,20769,20770,20771,20772,20773,20774,20775,20776,20777,20778,20779, 20780,20781,20782,20783,20784,20785,20786,20787,20788,20789,20790,20791, 20792,20793,20794,20795,20796,20797,20798,20799,20800,20801,20802,20803, 20804,20805,20806,20807,20808,20809,20810,20811,20812,20813,20814,20815, 20816,20817,20818,20819,20820,20821,20822,20823,20824,20825,20826,20827, 20828,20829,20830,20831,20832,20833,20834,20835,20836,20837,20838,20839, 20840,20841,20842,20843,20844,20845,20846,20847,20848,20849,20850,20851, 20852,20853,20854,20855,20856,20857,20858,20859,20860,20861,20862,20863, 20864,20865,20866,20867,20868,20869,20870,20871,20872,20873,20874,20875, 20876,20877,20878,20879,20880,20881,20882,20883,20884,20885,20886,20887, 20888,20889,20890,20891,20892,20893,20894,20895,20896,20897,20898,20899, 20900,20901,20902,20903,20904,20905,20906,20907,20908,20909,20910,20911, 20912,20913,20914,20915,20916,20917,20918,20919,20920,20921,20922,20923, 20924,20925,20926,20927,20928,20929,20930,20931,20932,20933,20934,20935, 20936,20937,20938,20939,20940,20941,20942,20943,20944,20945,20946,20947, 20948,20949,20950,20951,20952,20953,20954,20955,20956,20957,20958,20959, 20960,20961,20962,20963,20964,20965,20966,20967,20968,20969,20970,20971, 20972,20973,20974,20975,20976,20977,20978,20979,20980,20981,20982,20983, 20984,20985,20986,20987,20988,20989,20990,20991,20992,20993,20994,20995, 20996,20997,20998,20999,21000,21001,21002,21003,21004,21005,21006,21007, 21008,21009,21010,21011,21012,21013,21014,21015,21016,21017,21018,21019, 21020,21021,21022,21023,21024,21025,21026,21027,21028,21029,21030,21031, 21032,21033,21034,21035,21036,21037,21038,21039,21040,21041,21042,21043, 21044,21045,21046,21047,21048,21049,21050,21051,21052,21053,21054,21055, 21056,21057,21058,21059,21060,21061,21062,21063,21064,21065,21066,21067, 21068,21069,21070,21071,21072,21073,21074,21075,21076,21077,21078,21079, 21080,21081,21082,21083,21084,21085,21086,21087,21088,21089,21090,21091, 21092,21093,21094,21095,21096,21097,21098,21099,21100,21101,21102,21103, 21104,21105,21106,21107,21108,21109,21110,21111,21112,21113,21114,21115, 21116,21117,21118,21119,21120,21121,21122,21123,21124,21125,21126,21127, 21128,21129,21130,21131,21132,21133,21134,21135,21136,21137,21138,21139, 21140,21141,21142,21143,21144,21145,21146,21147,21148,21149,21150,21151, 21152,21153,21154,21155,21156,21157,21158,21159,21160,21161,21162,21163, 21164,21165,21166,21167,21168,21169,21170,21171,21172,21173,21174,21175, 21176,21177,21178,21179,21180,21181,21182,21183,21184,21185,21186,21187, 21188,21189,21190,21191,21192,21193,21194,21195,21196,21197,21198,21199, 21200,21201,21202,21203,21204,21205,21206,21207,21208,21209,21210,21211, 21212,21213,21214,21215,21216,21217,21218,21219,21220,21221,21222,21223, 21224,21225,21226,21227,21228,21229,21230,21231,21232,21233,21234,21235, 21236,21237,21238,21239,21240,21241,21242,21243,21244,21245,21246,21247, 21248,21249,21250,21251,21252,21253,21254,21255,21256,21257,21258,21259, 21260,21261,21262,21263,21264,21265,21266,21267,21268,21269,21270,21271, 21272,21273,21274,21275,21276,21277,21278,21279,21280,21281,21282,21283, 21284,21285,21286,21287,21288,21289,21290,21291,21292,21293,21294,21295, 21296,21297,21298,21299,21300,21301,21302,21303,21304,21305,21306,21307, 21308,21309,21310,21311,21312,21313,21314,21315,21316,21317,21318,21319, 21320,21321,21322,21323,21324,21325,21326,21327,21328,21329,21330,21331, 21332,21333,21334,21335,21336,21337,21338,21339,21340,21341,21342,21343, 21344,21345,21346,21347,21348,21349,21350,21351,21352,21353,21354,21355, 21356,21357,21358,21359,21360,21361,21362,21363,21364,21365,21366,21367, 21368,21369,21370,21371,21372,21373,21374,21375,21376,21377,21378,21379, 21380,21381,21382,21383,21384,21385,21386,21387,21388,21389,21390,21391, 21392,21393,21394,21395,21396,21397,21398,21399,21400,21401,21402,21403, 21404,21405,21406,21407,21408,21409,21410,21411,21412,21413,21414,21415, 21416,21417,21418,21419,21420,21421,21422,21423,21424,21425,21426,21427, 21428,21429,21430,21431,21432,21433,21434,21435,21436,21437,21438,21439, 21440,21441,21442,21443,21444,21445,21446,21447,21448,21449,21450,21451, 21452,21453,21454,21455,21456,21457,21458,21459,21460,21461,21462,21463, 21464,21465,21466,21467,21468,21469,21470,21471,21472,21473,21474,21475, 21476,21477,21478,21479,21480,21481,21482,21483,21484,21485,21486,21487, 21488,21489,21490,21491,21492,21493,21494,21495,21496,21497,21498,21499, 21500,21501,21502,21503,21504,21505,21506,21507,21508,21509,21510,21511, 21512,21513,21514,21515,21516,21517,21518,21519,21520,21521,21522,21523, 21524,21525,21526,21527,21528,21529,21530,21531,21532,21533,21534,21535, 21536,21537,21538,21539,21540,21541,21542,21543,21544,21545,21546,21547, 21548,21549,21550,21551,21552,21553,21554,21555,21556,21557,21558,21559, 21560,21561,21562,21563,21564,21565,21566,21567,21568,21569,21570,21571, 21572,21573,21574,21575,21576,21577,21578,21579,21580,21581,21582,21583, 21584,21585,21586,21587,21588,21589,21590,21591,21592,21593,21594,21595, 21596,21597,21598,21599,21600,21601,21602,21603,21604,21605,21606,21607, 21608,21609,21610,21611,21612,21613,21614,21615,21616,21617,21618,21619, 21620,21621,21622,21623,21624,21625,21626,21627,21628,21629,21630,21631, 21632,21633,21634,21635,21636,21637,21638,21639,21640,21641,21642,21643, 21644,21645,21646,21647,21648,21649,21650,21651,21652,21653,21654,21655, 21656,21657,21658,21659,21660,21661,21662,21663,21664,21665,21666,21667, 21668,21669,21670,21671,21672,21673,21674,21675,21676,21677,21678,21679, 21680,21681,21682,21683,21684,21685,21686,21687,21688,21689,21690,21691, 21692,21693,21694,21695,21696,21697,21698,21699,21700,21701,21702,21703, 21704,21705,21706,21707,21708,21709,21710,21711,21712,21713,21714,21715, 21716,21717,21718,21719,21720,21721,21722,21723,21724,21725,21726,21727, 21728,21729,21730,21731,21732,21733,21734,21735,21736,21737,21738,21739, 21740,21741,21742,21743,21744,21745,21746,21747,21748,21749,21750,21751, 21752,21753,21754,21755,21756,21757,21758,21759,21760,21761,21762,21763, 21764,21765,21766,21767,21768,21769,21770,21771,21772,21773,21774,21775, 21776,21777,21778,21779,21780,21781,21782,21783,21784,21785,21786,21787, 21788,21789,21790,21791,21792,21793,21794,21795,21796,21797,21798,21799, 21800,21801,21802,21803,21804,21805,21806,21807,21808,21809,21810,21811, 21812,21813,21814,21815,21816,21817,21818,21819,21820,21821,21822,21823, 21824,21825,21826,21827,21828,21829,21830,21831,21832,21833,21834,21835, 21836,21837,21838,21839,21840,21841,21842,21843,21844,21845,21846,21847, 21848,21849,21850,21851,21852,21853,21854,21855,21856,21857,21858,21859, 21860,21861,21862,21863,21864,21865,21866,21867,21868,21869,21870,21871, 21872,21873,21874,21875,21876,21877,21878,21879,21880,21881,21882,21883, 21884,21885,21886,21887,21888,21889,21890,21891,21892,21893,21894,21895, 21896,21897,21898,21899,21900,21901,21902,21903,21904,21905,21906,21907, 21908,21909,21910,21911,21912,21913,21914,21915,21916,21917,21918,21919, 21920,21921,21922,21923,21924,21925,21926,21927,21928,21929,21930,21931, 21932,21933,21934,21935,21936,21937,21938,21939,21940,21941,21942,21943, 21944,21945,21946,21947,21948,21949,21950,21951,21952,21953,21954,21955, 21956,21957,21958,21959,21960,21961,21962,21963,21964,21965,21966,21967, 21968,21969,21970,21971,21972,21973,21974,21975,21976,21977,21978,21979, 21980,21981,21982,21983,21984,21985,21986,21987,21988,21989,21990,21991, 21992,21993,21994,21995,21996,21997,21998,21999,22000,22001,22002,22003, 22004,22005,22006,22007,22008,22009,22010,22011,22012,22013,22014,22015, 22016,22017,22018,22019,22020,22021,22022,22023,22024,22025,22026,22027, 22028,22029,22030,22031,22032,22033,22034,22035,22036,22037,22038,22039, 22040,22041,22042,22043,22044,22045,22046,22047,22048,22049,22050,22051, 22052,22053,22054,22055,22056,22057,22058,22059,22060,22061,22062,22063, 22064,22065,22066,22067,22068,22069,22070,22071,22072,22073,22074,22075, 22076,22077,22078,22079,22080,22081,22082,22083,22084,22085,22086,22087, 22088,22089,22090,22091,22092,22093,22094,22095,22096,22097,22098,22099, 22100,22101,22102,22103,22104,22105,22106,22107,22108,22109,22110,22111, 22112,22113,22114,22115,22116,22117,22118,22119,22120,22121,22122,22123, 22124,22125,22126,22127,22128,22129,22130,22131,22132,22133,22134,22135, 22136,22137,22138,22139,22140,22141,22142,22143,22144,22145,22146,22147, 22148,22149,22150,22151,22152,22153,22154,22155,22156,22157,22158,22159, 22160,22161,22162,22163,22164,22165,22166,22167,22168,22169,22170,22171, 22172,22173,22174,22175,22176,22177,22178,22179,22180,22181,22182,22183, 22184,22185,22186,22187,22188,22189,22190,22191,22192,22193,22194,22195, 22196,22197,22198,22199,22200,22201,22202,22203,22204,22205,22206,22207, 22208,22209,22210,22211,22212,22213,22214,22215,22216,22217,22218,22219, 22220,22221,22222,22223,22224,22225,22226,22227,22228,22229,22230,22231, 22232,22233,22234,22235,22236,22237,22238,22239,22240,22241,22242,22243, 22244,22245,22246,22247,22248,22249,22250,22251,22252,22253,22254,22255, 22256,22257,22258,22259,22260,22261,22262,22263,22264,22265,22266,22267, 22268,22269,22270,22271,22272,22273,22274,22275,22276,22277,22278,22279, 22280,22281,22282,22283,22284,22285,22286,22287,22288,22289,22290,22291, 22292,22293,22294,22295,22296,22297,22298,22299,22300,22301,22302,22303, 22304,22305,22306,22307,22308,22309,22310,22311,22312,22313,22314,22315, 22316,22317,22318,22319,22320,22321,22322,22323,22324,22325,22326,22327, 22328,22329,22330,22331,22332,22333,22334,22335,22336,22337,22338,22339, 22340,22341,22342,22343,22344,22345,22346,22347,22348,22349,22350,22351, 22352,22353,22354,22355,22356,22357,22358,22359,22360,22361,22362,22363, 22364,22365,22366,22367,22368,22369,22370,22371,22372,22373,22374,22375, 22376,22377,22378,22379,22380,22381,22382,22383,22384,22385,22386,22387, 22388,22389,22390,22391,22392,22393,22394,22395,22396,22397,22398,22399, 22400,22401,22402,22403,22404,22405,22406,22407,22408,22409,22410,22411, 22412,22413,22414,22415,22416,22417,22418,22419,22420,22421,22422,22423, 22424,22425,22426,22427,22428,22429,22430,22431,22432,22433,22434,22435, 22436,22437,22438,22439,22440,22441,22442,22443,22444,22445,22446,22447, 22448,22449,22450,22451,22452,22453,22454,22455,22456,22457,22458,22459, 22460,22461,22462,22463,22464,22465,22466,22467,22468,22469,22470,22471, 22472,22473,22474,22475,22476,22477,22478,22479,22480,22481,22482,22483, 22484,22485,22486,22487,22488,22489,22490,22491,22492,22493,22494,22495, 22496,22497,22498,22499,22500,22501,22502,22503,22504,22505,22506,22507, 22508,22509,22510,22511,22512,22513,22514,22515,22516,22517,22518,22519, 22520,22521,22522,22523,22524,22525,22526,22527,22528,22529,22530,22531, 22532,22533,22534,22535,22536,22537,22538,22539,22540,22541,22542,22543, 22544,22545,22546,22547,22548,22549,22550,22551,22552,22553,22554,22555, 22556,22557,22558,22559,22560,22561,22562,22563,22564,22565,22566,22567, 22568,22569,22570,22571,22572,22573,22574,22575,22576,22577,22578,22579, 22580,22581,22582,22583,22584,22585,22586,22587,22588,22589,22590,22591, 22592,22593,22594,22595,22596,22597,22598,22599,22600,22601,22602,22603, 22604,22605,22606,22607,22608,22609,22610,22611,22612,22613,22614,22615, 22616,22617,22618,22619,22620,22621,22622,22623,22624,22625,22626,22627, 22628,22629,22630,22631,22632,22633,22634,22635,22636,22637,22638,22639, 22640,22641,22642,22643,22644,22645,22646,22647,22648,22649,22650,22651, 22652,22653,22654,22655,22656,22657,22658,22659,22660,22661,22662,22663, 22664,22665,22666,22667,22668,22669,22670,22671,22672,22673,22674,22675, 22676,22677,22678,22679,22680,22681,22682,22683,22684,22685,22686,22687, 22688,22689,22690,22691,22692,22693,22694,22695,22696,22697,22698,22699, 22700,22701,22702,22703,22704,22705,22706,22707,22708,22709,22710,22711, 22712,22713,22714,22715,22716,22717,22718,22719,22720,22721,22722,22723, 22724,22725,22726,22727,22728,22729,22730,22731,22732,22733,22734,22735, 22736,22737,22738,22739,22740,22741,22742,22743,22744,22745,22746,22747, 22748,22749,22750,22751,22752,22753,22754,22755,22756,22757,22758,22759, 22760,22761,22762,22763,22764,22765,22766,22767,22768,22769,22770,22771, 22772,22773,22774,22775,22776,22777,22778,22779,22780,22781,22782,22783, 22784,22785,22786,22787,22788,22789,22790,22791,22792,22793,22794,22795, 22796,22797,22798,22799,22800,22801,22802,22803,22804,22805,22806,22807, 22808,22809,22810,22811,22812,22813,22814,22815,22816,22817,22818,22819, 22820,22821,22822,22823,22824,22825,22826,22827,22828,22829,22830,22831, 22832,22833,22834,22835,22836,22837,22838,22839,22840,22841,22842,22843, 22844,22845,22846,22847,22848,22849,22850,22851,22852,22853,22854,22855, 22856,22857,22858,22859,22860,22861,22862,22863,22864,22865,22866,22867, 22868,22869,22870,22871,22872,22873,22874,22875,22876,22877,22878,22879, 22880,22881,22882,22883,22884,22885,22886,22887,22888,22889,22890,22891, 22892,22893,22894,22895,22896,22897,22898,22899,22900,22901,22902,22903, 22904,22905,22906,22907,22908,22909,22910,22911,22912,22913,22914,22915, 22916,22917,22918,22919,22920,22921,22922,22923,22924,22925,22926,22927, 22928,22929,22930,22931,22932,22933,22934,22935,22936,22937,22938,22939, 22940,22941,22942,22943,22944,22945,22946,22947,22948,22949,22950,22951, 22952,22953,22954,22955,22956,22957,22958,22959,22960,22961,22962,22963, 22964,22965,22966,22967,22968,22969,22970,22971,22972,22973,22974,22975, 22976,22977,22978,22979,22980,22981,22982,22983,22984,22985,22986,22987, 22988,22989,22990,22991,22992,22993,22994,22995,22996,22997,22998,22999, 23000,23001,23002,23003,23004,23005,23006,23007,23008,23009,23010,23011, 23012,23013,23014,23015,23016,23017,23018,23019,23020,23021,23022,23023, 23024,23025,23026,23027,23028,23029,23030,23031,23032,23033,23034,23035, 23036,23037,23038,23039,23040,23041,23042,23043,23044,23045,23046,23047, 23048,23049,23050,23051,23052,23053,23054,23055,23056,23057,23058,23059, 23060,23061,23062,23063,23064,23065,23066,23067,23068,23069,23070,23071, 23072,23073,23074,23075,23076,23077,23078,23079,23080,23081,23082,23083, 23084,23085,23086,23087,23088,23089,23090,23091,23092,23093,23094,23095, 23096,23097,23098,23099,23100,23101,23102,23103,23104,23105,23106,23107, 23108,23109,23110,23111,23112,23113,23114,23115,23116,23117,23118,23119, 23120,23121,23122,23123,23124,23125,23126,23127,23128,23129,23130,23131, 23132,23133,23134,23135,23136,23137,23138,23139,23140,23141,23142,23143, 23144,23145,23146,23147,23148,23149,23150,23151,23152,23153,23154,23155, 23156,23157,23158,23159,23160,23161,23162,23163,23164,23165,23166,23167, 23168,23169,23170,23171,23172,23173,23174,23175,23176,23177,23178,23179, 23180,23181,23182,23183,23184,23185,23186,23187,23188,23189,23190,23191, 23192,23193,23194,23195,23196,23197,23198,23199,23200,23201,23202,23203, 23204,23205,23206,23207,23208,23209,23210,23211,23212,23213,23214,23215, 23216,23217,23218,23219,23220,23221,23222,23223,23224,23225,23226,23227, 23228,23229,23230,23231,23232,23233,23234,23235,23236,23237,23238,23239, 23240,23241,23242,23243,23244,23245,23246,23247,23248,23249,23250,23251, 23252,23253,23254,23255,23256,23257,23258,23259,23260,23261,23262,23263, 23264,23265,23266,23267,23268,23269,23270,23271,23272,23273,23274,23275, 23276,23277,23278,23279,23280,23281,23282,23283,23284,23285,23286,23287, 23288,23289,23290,23291,23292,23293,23294,23295,23296,23297,23298,23299, 23300,23301,23302,23303,23304,23305,23306,23307,23308,23309,23310,23311, 23312,23313,23314,23315,23316,23317,23318,23319,23320,23321,23322,23323, 23324,23325,23326,23327,23328,23329,23330,23331,23332,23333,23334,23335, 23336,23337,23338,23339,23340,23341,23342,23343,23344,23345,23346,23347, 23348,23349,23350,23351,23352,23353,23354,23355,23356,23357,23358,23359, 23360,23361,23362,23363,23364,23365,23366,23367,23368,23369,23370,23371, 23372,23373,23374,23375,23376,23377,23378,23379,23380,23381,23382,23383, 23384,23385,23386,23387,23388,23389,23390,23391,23392,23393,23394,23395, 23396,23397,23398,23399,23400,23401,23402,23403,23404,23405,23406,23407, 23408,23409,23410,23411,23412,23413,23414,23415,23416,23417,23418,23419, 23420,23421,23422,23423,23424,23425,23426,23427,23428,23429,23430,23431, 23432,23433,23434,23435,23436,23437,23438,23439,23440,23441,23442,23443, 23444,23445,23446,23447,23448,23449,23450,23451,23452,23453,23454,23455, 23456,23457,23458,23459,23460,23461,23462,23463,23464,23465,23466,23467, 23468,23469,23470,23471,23472,23473,23474,23475,23476,23477,23478,23479, 23480,23481,23482,23483,23484,23485,23486,23487,23488,23489,23490,23491, 23492,23493,23494,23495,23496,23497,23498,23499,23500,23501,23502,23503, 23504,23505,23506,23507,23508,23509,23510,23511,23512,23513,23514,23515, 23516,23517,23518,23519,23520,23521,23522,23523,23524,23525,23526,23527, 23528,23529,23530,23531,23532,23533,23534,23535,23536,23537,23538,23539, 23540,23541,23542,23543,23544,23545,23546,23547,23548,23549,23550,23551, 23552,23553,23554,23555,23556,23557,23558,23559,23560,23561,23562,23563, 23564,23565,23566,23567,23568,23569,23570,23571,23572,23573,23574,23575, 23576,23577,23578,23579,23580,23581,23582,23583,23584,23585,23586,23587, 23588,23589,23590,23591,23592,23593,23594,23595,23596,23597,23598,23599, 23600,23601,23602,23603,23604,23605,23606,23607,23608,23609,23610,23611, 23612,23613,23614,23615,23616,23617,23618,23619,23620,23621,23622,23623, 23624,23625,23626,23627,23628,23629,23630,23631,23632,23633,23634,23635, 23636,23637,23638,23639,23640,23641,23642,23643,23644,23645,23646,23647, 23648,23649,23650,23651,23652,23653,23654,23655,23656,23657,23658,23659, 23660,23661,23662,23663,23664,23665,23666,23667,23668,23669,23670,23671, 23672,23673,23674,23675,23676,23677,23678,23679,23680,23681,23682,23683, 23684,23685,23686,23687,23688,23689,23690,23691,23692,23693,23694,23695, 23696,23697,23698,23699,23700,23701,23702,23703,23704,23705,23706,23707, 23708,23709,23710,23711,23712,23713,23714,23715,23716,23717,23718,23719, 23720,23721,23722,23723,23724,23725,23726,23727,23728,23729,23730,23731, 23732,23733,23734,23735,23736,23737,23738,23739,23740,23741,23742,23743, 23744,23745,23746,23747,23748,23749,23750,23751,23752,23753,23754,23755, 23756,23757,23758,23759,23760,23761,23762,23763,23764,23765,23766,23767, 23768,23769,23770,23771,23772,23773,23774,23775,23776,23777,23778,23779, 23780,23781,23782,23783,23784,23785,23786,23787,23788,23789,23790,23791, 23792,23793,23794,23795,23796,23797,23798,23799,23800,23801,23802,23803, 23804,23805,23806,23807,23808,23809,23810,23811,23812,23813,23814,23815, 23816,23817,23818,23819,23820,23821,23822,23823,23824,23825,23826,23827, 23828,23829,23830,23831,23832,23833,23834,23835,23836,23837,23838,23839, 23840,23841,23842,23843,23844,23845,23846,23847,23848,23849,23850,23851, 23852,23853,23854,23855,23856,23857,23858,23859,23860,23861,23862,23863, 23864,23865,23866,23867,23868,23869,23870,23871,23872,23873,23874,23875, 23876,23877,23878,23879,23880,23881,23882,23883,23884,23885,23886,23887, 23888,23889,23890,23891,23892,23893,23894,23895,23896,23897,23898,23899, 23900,23901,23902,23903,23904,23905,23906,23907,23908,23909,23910,23911, 23912,23913,23914,23915,23916,23917,23918,23919,23920,23921,23922,23923, 23924,23925,23926,23927,23928,23929,23930,23931,23932,23933,23934,23935, 23936,23937,23938,23939,23940,23941,23942,23943,23944,23945,23946,23947, 23948,23949,23950,23951,23952,23953,23954,23955,23956,23957,23958,23959, 23960,23961,23962,23963,23964,23965,23966,23967,23968,23969,23970,23971, 23972,23973,23974,23975,23976,23977,23978,23979,23980,23981,23982,23983, 23984,23985,23986,23987,23988,23989,23990,23991,23992,23993,23994,23995, 23996,23997,23998,23999,24000,24001,24002,24003,24004,24005,24006,24007, 24008,24009,24010,24011,24012,24013,24014,24015,24016,24017,24018,24019, 24020,24021,24022,24023,24024,24025,24026,24027,24028,24029,24030,24031, 24032,24033,24034,24035,24036,24037,24038,24039,24040,24041,24042,24043, 24044,24045,24046,24047,24048,24049,24050,24051,24052,24053,24054,24055, 24056,24057,24058,24059,24060,24061,24062,24063,24064,24065,24066,24067, 24068,24069,24070,24071,24072,24073,24074,24075,24076,24077,24078,24079, 24080,24081,24082,24083,24084,24085,24086,24087,24088,24089,24090,24091, 24092,24093,24094,24095,24096,24097,24098,24099,24100,24101,24102,24103, 24104,24105,24106,24107,24108,24109,24110,24111,24112,24113,24114,24115, 24116,24117,24118,24119,24120,24121,24122,24123,24124,24125,24126,24127, 24128,24129,24130,24131,24132,24133,24134,24135,24136,24137,24138,24139, 24140,24141,24142,24143,24144,24145,24146,24147,24148,24149,24150,24151, 24152,24153,24154,24155,24156,24157,24158,24159,24160,24161,24162,24163, 24164,24165,24166,24167,24168,24169,24170,24171,24172,24173,24174,24175, 24176,24177,24178,24179,24180,24181,24182,24183,24184,24185,24186,24187, 24188,24189,24190,24191,24192,24193,24194,24195,24196,24197,24198,24199, 24200,24201,24202,24203,24204,24205,24206,24207,24208,24209,24210,24211, 24212,24213,24214,24215,24216,24217,24218,24219,24220,24221,24222,24223, 24224,24225,24226,24227,24228,24229,24230,24231,24232,24233,24234,24235, 24236,24237,24238,24239,24240,24241,24242,24243,24244,24245,24246,24247, 24248,24249,24250,24251,24252,24253,24254,24255,24256,24257,24258,24259, 24260,24261,24262,24263,24264,24265,24266,24267,24268,24269,24270,24271, 24272,24273,24274,24275,24276,24277,24278,24279,24280,24281,24282,24283, 24284,24285,24286,24287,24288,24289,24290,24291,24292,24293,24294,24295, 24296,24297,24298,24299,24300,24301,24302,24303,24304,24305,24306,24307, 24308,24309,24310,24311,24312,24313,24314,24315,24316,24317,24318,24319, 24320,24321,24322,24323,24324,24325,24326,24327,24328,24329,24330,24331, 24332,24333,24334,24335,24336,24337,24338,24339,24340,24341,24342,24343, 24344,24345,24346,24347,24348,24349,24350,24351,24352,24353,24354,24355, 24356,24357,24358,24359,24360,24361,24362,24363,24364,24365,24366,24367, 24368,24369,24370,24371,24372,24373,24374,24375,24376,24377,24378,24379, 24380,24381,24382,24383,24384,24385,24386,24387,24388,24389,24390,24391, 24392,24393,24394,24395,24396,24397,24398,24399,24400,24401,24402,24403, 24404,24405,24406,24407,24408,24409,24410,24411,24412,24413,24414,24415, 24416,24417,24418,24419,24420,24421,24422,24423,24424,24425,24426,24427, 24428,24429,24430,24431,24432,24433,24434,24435,24436,24437,24438,24439, 24440,24441,24442,24443,24444,24445,24446,24447,24448,24449,24450,24451, 24452,24453,24454,24455,24456,24457,24458,24459,24460,24461,24462,24463, 24464,24465,24466,24467,24468,24469,24470,24471,24472,24473,24474,24475, 24476,24477,24478,24479,24480,24481,24482,24483,24484,24485,24486,24487, 24488,24489,24490,24491,24492,24493,24494,24495,24496,24497,24498,24499, 24500,24501,24502,24503,24504,24505,24506,24507,24508,24509,24510,24511, 24512,24513,24514,24515,24516,24517,24518,24519,24520,24521,24522,24523, 24524,24525,24526,24527,24528,24529,24530,24531,24532,24533,24534,24535, 24536,24537,24538,24539,24540,24541,24542,24543,24544,24545,24546,24547, 24548,24549,24550,24551,24552,24553,24554,24555,24556,24557,24558,24559, 24560,24561,24562,24563,24564,24565,24566,24567,24568,24569,24570,24571, 24572,24573,24574,24575,24576,24577,24578,24579,24580,24581,24582,24583, 24584,24585,24586,24587,24588,24589,24590,24591,24592,24593,24594,24595, 24596,24597,24598,24599,24600,24601,24602,24603,24604,24605,24606,24607, 24608,24609,24610,24611,24612,24613,24614,24615,24616,24617,24618,24619, 24620,24621,24622,24623,24624,24625,24626,24627,24628,24629,24630,24631, 24632,24633,24634,24635,24636,24637,24638,24639,24640,24641,24642,24643, 24644,24645,24646,24647,24648,24649,24650,24651,24652,24653,24654,24655, 24656,24657,24658,24659,24660,24661,24662,24663,24664,24665,24666,24667, 24668,24669,24670,24671,24672,24673,24674,24675,24676,24677,24678,24679, 24680,24681,24682,24683,24684,24685,24686,24687,24688,24689,24690,24691, 24692,24693,24694,24695,24696,24697,24698,24699,24700,24701,24702,24703, 24704,24705,24706,24707,24708,24709,24710,24711,24712,24713,24714,24715, 24716,24717,24718,24719,24720,24721,24722,24723,24724,24725,24726,24727, 24728,24729,24730,24731,24732,24733,24734,24735,24736,24737,24738,24739, 24740,24741,24742,24743,24744,24745,24746,24747,24748,24749,24750,24751, 24752,24753,24754,24755,24756,24757,24758,24759,24760,24761,24762,24763, 24764,24765,24766,24767,24768,24769,24770,24771,24772,24773,24774,24775, 24776,24777,24778,24779,24780,24781,24782,24783,24784,24785,24786,24787, 24788,24789,24790,24791,24792,24793,24794,24795,24796,24797,24798,24799, 24800,24801,24802,24803,24804,24805,24806,24807,24808,24809,24810,24811, 24812,24813,24814,24815,24816,24817,24818,24819,24820,24821,24822,24823, 24824,24825,24826,24827,24828,24829,24830,24831,24832,24833,24834,24835, 24836,24837,24838,24839,24840,24841,24842,24843,24844,24845,24846,24847, 24848,24849,24850,24851,24852,24853,24854,24855,24856,24857,24858,24859, 24860,24861,24862,24863,24864,24865,24866,24867,24868,24869,24870,24871, 24872,24873,24874,24875,24876,24877,24878,24879,24880,24881,24882,24883, 24884,24885,24886,24887,24888,24889,24890,24891,24892,24893,24894,24895, 24896,24897,24898,24899,24900,24901,24902,24903,24904,24905,24906,24907, 24908,24909,24910,24911,24912,24913,24914,24915,24916,24917,24918,24919, 24920,24921,24922,24923,24924,24925,24926,24927,24928,24929,24930,24931, 24932,24933,24934,24935,24936,24937,24938,24939,24940,24941,24942,24943, 24944,24945,24946,24947,24948,24949,24950,24951,24952,24953,24954,24955, 24956,24957,24958,24959,24960,24961,24962,24963,24964,24965,24966,24967, 24968,24969,24970,24971,24972,24973,24974,24975,24976,24977,24978,24979, 24980,24981,24982,24983,24984,24985,24986,24987,24988,24989,24990,24991, 24992,24993,24994,24995,24996,24997,24998,24999,25000,25001,25002,25003, 25004,25005,25006,25007,25008,25009,25010,25011,25012,25013,25014,25015, 25016,25017,25018,25019,25020,25021,25022,25023,25024,25025,25026,25027, 25028,25029,25030,25031,25032,25033,25034,25035,25036,25037,25038,25039, 25040,25041,25042,25043,25044,25045,25046,25047,25048,25049,25050,25051, 25052,25053,25054,25055,25056,25057,25058,25059,25060,25061,25062,25063, 25064,25065,25066,25067,25068,25069,25070,25071,25072,25073,25074,25075, 25076,25077,25078,25079,25080,25081,25082,25083,25084,25085,25086,25087, 25088,25089,25090,25091,25092,25093,25094,25095,25096,25097,25098,25099, 25100,25101,25102,25103,25104,25105,25106,25107,25108,25109,25110,25111, 25112,25113,25114,25115,25116,25117,25118,25119,25120,25121,25122,25123, 25124,25125,25126,25127,25128,25129,25130,25131,25132,25133,25134,25135, 25136,25137,25138,25139,25140,25141,25142,25143,25144,25145,25146,25147, 25148,25149,25150,25151,25152,25153,25154,25155,25156,25157,25158,25159, 25160,25161,25162,25163,25164,25165,25166,25167,25168,25169,25170,25171, 25172,25173,25174,25175,25176,25177,25178,25179,25180,25181,25182,25183, 25184,25185,25186,25187,25188,25189,25190,25191,25192,25193,25194,25195, 25196,25197,25198,25199,25200,25201,25202,25203,25204,25205,25206,25207, 25208,25209,25210,25211,25212,25213,25214,25215,25216,25217,25218,25219, 25220,25221,25222,25223,25224,25225,25226,25227,25228,25229,25230,25231, 25232,25233,25234,25235,25236,25237,25238,25239,25240,25241,25242,25243, 25244,25245,25246,25247,25248,25249,25250,25251,25252,25253,25254,25255, 25256,25257,25258,25259,25260,25261,25262,25263,25264,25265,25266,25267, 25268,25269,25270,25271,25272,25273,25274,25275,25276,25277,25278,25279, 25280,25281,25282,25283,25284,25285,25286,25287,25288,25289,25290,25291, 25292,25293,25294,25295,25296,25297,25298,25299,25300,25301,25302,25303, 25304,25305,25306,25307,25308,25309,25310,25311,25312,25313,25314,25315, 25316,25317,25318,25319,25320,25321,25322,25323,25324,25325,25326,25327, 25328,25329,25330,25331,25332,25333,25334,25335,25336,25337,25338,25339, 25340,25341,25342,25343,25344,25345,25346,25347,25348,25349,25350,25351, 25352,25353,25354,25355,25356,25357,25358,25359,25360,25361,25362,25363, 25364,25365,25366,25367,25368,25369,25370,25371,25372,25373,25374,25375, 25376,25377,25378,25379,25380,25381,25382,25383,25384,25385,25386,25387, 25388,25389,25390,25391,25392,25393,25394,25395,25396,25397,25398,25399, 25400,25401,25402,25403,25404,25405,25406,25407,25408,25409,25410,25411, 25412,25413,25414,25415,25416,25417,25418,25419,25420,25421,25422,25423, 25424,25425,25426,25427,25428,25429,25430,25431,25432,25433,25434,25435, 25436,25437,25438,25439,25440,25441,25442,25443,25444,25445,25446,25447, 25448,25449,25450,25451,25452,25453,25454,25455,25456,25457,25458,25459, 25460,25461,25462,25463,25464,25465,25466,25467,25468,25469,25470,25471, 25472,25473,25474,25475,25476,25477,25478,25479,25480,25481,25482,25483, 25484,25485,25486,25487,25488,25489,25490,25491,25492,25493,25494,25495, 25496,25497,25498,25499,25500,25501,25502,25503,25504,25505,25506,25507, 25508,25509,25510,25511,25512,25513,25514,25515,25516,25517,25518,25519, 25520,25521,25522,25523,25524,25525,25526,25527,25528,25529,25530,25531, 25532,25533,25534,25535,25536,25537,25538,25539,25540,25541,25542,25543, 25544,25545,25546,25547,25548,25549,25550,25551,25552,25553,25554,25555, 25556,25557,25558,25559,25560,25561,25562,25563,25564,25565,25566,25567, 25568,25569,25570,25571,25572,25573,25574,25575,25576,25577,25578,25579, 25580,25581,25582,25583,25584,25585,25586,25587,25588,25589,25590,25591, 25592,25593,25594,25595,25596,25597,25598,25599,25600,25601,25602,25603, 25604,25605,25606,25607,25608,25609,25610,25611,25612,25613,25614,25615, 25616,25617,25618,25619,25620,25621,25622,25623,25624,25625,25626,25627, 25628,25629,25630,25631,25632,25633,25634,25635,25636,25637,25638,25639, 25640,25641,25642,25643,25644,25645,25646,25647,25648,25649,25650,25651, 25652,25653,25654,25655,25656,25657,25658,25659,25660,25661,25662,25663, 25664,25665,25666,25667,25668,25669,25670,25671,25672,25673,25674,25675, 25676,25677,25678,25679,25680,25681,25682,25683,25684,25685,25686,25687, 25688,25689,25690,25691,25692,25693,25694,25695,25696,25697,25698,25699, 25700,25701,25702,25703,25704,25705,25706,25707,25708,25709,25710,25711, 25712,25713,25714,25715,25716,25717,25718,25719,25720,25721,25722,25723, 25724,25725,25726,25727,25728,25729,25730,25731,25732,25733,25734,25735, 25736,25737,25738,25739,25740,25741,25742,25743,25744,25745,25746,25747, 25748,25749,25750,25751,25752,25753,25754,25755,25756,25757,25758,25759, 25760,25761,25762,25763,25764,25765,25766,25767,25768,25769,25770,25771, 25772,25773,25774,25775,25776,25777,25778,25779,25780,25781,25782,25783, 25784,25785,25786,25787,25788,25789,25790,25791,25792,25793,25794,25795, 25796,25797,25798,25799,25800,25801,25802,25803,25804,25805,25806,25807, 25808,25809,25810,25811,25812,25813,25814,25815,25816,25817,25818,25819, 25820,25821,25822,25823,25824,25825,25826,25827,25828,25829,25830,25831, 25832,25833,25834,25835,25836,25837,25838,25839,25840,25841,25842,25843, 25844,25845,25846,25847,25848,25849,25850,25851,25852,25853,25854,25855, 25856,25857,25858,25859,25860,25861,25862,25863,25864,25865,25866,25867, 25868,25869,25870,25871,25872,25873,25874,25875,25876,25877,25878,25879, 25880,25881,25882,25883,25884,25885,25886,25887,25888,25889,25890,25891, 25892,25893,25894,25895,25896,25897,25898,25899,25900,25901,25902,25903, 25904,25905,25906,25907,25908,25909,25910,25911,25912,25913,25914,25915, 25916,25917,25918,25919,25920,25921,25922,25923,25924,25925,25926,25927, 25928,25929,25930,25931,25932,25933,25934,25935,25936,25937,25938,25939, 25940,25941,25942,25943,25944,25945,25946,25947,25948,25949,25950,25951, 25952,25953,25954,25955,25956,25957,25958,25959,25960,25961,25962,25963, 25964,25965,25966,25967,25968,25969,25970,25971,25972,25973,25974,25975, 25976,25977,25978,25979,25980,25981,25982,25983,25984,25985,25986,25987, 25988,25989,25990,25991,25992,25993,25994,25995,25996,25997,25998,25999, 26000,26001,26002,26003,26004,26005,26006,26007,26008,26009,26010,26011, 26012,26013,26014,26015,26016,26017,26018,26019,26020,26021,26022,26023, 26024,26025,26026,26027,26028,26029,26030,26031,26032,26033,26034,26035, 26036,26037,26038,26039,26040,26041,26042,26043,26044,26045,26046,26047, 26048,26049,26050,26051,26052,26053,26054,26055,26056,26057,26058,26059, 26060,26061,26062,26063,26064,26065,26066,26067,26068,26069,26070,26071, 26072,26073,26074,26075,26076,26077,26078,26079,26080,26081,26082,26083, 26084,26085,26086,26087,26088,26089,26090,26091,26092,26093,26094,26095, 26096,26097,26098,26099,26100,26101,26102,26103,26104,26105,26106,26107, 26108,26109,26110,26111,26112,26113,26114,26115,26116,26117,26118,26119, 26120,26121,26122,26123,26124,26125,26126,26127,26128,26129,26130,26131, 26132,26133,26134,26135,26136,26137,26138,26139,26140,26141,26142,26143, 26144,26145,26146,26147,26148,26149,26150,26151,26152,26153,26154,26155, 26156,26157,26158,26159,26160,26161,26162,26163,26164,26165,26166,26167, 26168,26169,26170,26171,26172,26173,26174,26175,26176,26177,26178,26179, 26180,26181,26182,26183,26184,26185,26186,26187,26188,26189,26190,26191, 26192,26193,26194,26195,26196,26197,26198,26199,26200,26201,26202,26203, 26204,26205,26206,26207,26208,26209,26210,26211,26212,26213,26214,26215, 26216,26217,26218,26219,26220,26221,26222,26223,26224,26225,26226,26227, 26228,26229,26230,26231,26232,26233,26234,26235,26236,26237,26238,26239, 26240,26241,26242,26243,26244,26245,26246,26247,26248,26249,26250,26251, 26252,26253,26254,26255,26256,26257,26258,26259,26260,26261,26262,26263, 26264,26265,26266,26267,26268,26269,26270,26271,26272,26273,26274,26275, 26276,26277,26278,26279,26280,26281,26282,26283,26284,26285,26286,26287, 26288,26289,26290,26291,26292,26293,26294,26295,26296,26297,26298,26299, 26300,26301,26302,26303,26304,26305,26306,26307,26308,26309,26310,26311, 26312,26313,26314,26315,26316,26317,26318,26319,26320,26321,26322,26323, 26324,26325,26326,26327,26328,26329,26330,26331,26332,26333,26334,26335, 26336,26337,26338,26339,26340,26341,26342,26343,26344,26345,26346,26347, 26348,26349,26350,26351,26352,26353,26354,26355,26356,26357,26358,26359, 26360,26361,26362,26363,26364,26365,26366,26367,26368,26369,26370,26371, 26372,26373,26374,26375,26376,26377,26378,26379,26380,26381,26382,26383, 26384,26385,26386,26387,26388,26389,26390,26391,26392,26393,26394,26395, 26396,26397,26398,26399,26400,26401,26402,26403,26404,26405,26406,26407, 26408,26409,26410,26411,26412,26413,26414,26415,26416,26417,26418,26419, 26420,26421,26422,26423,26424,26425,26426,26427,26428,26429,26430,26431, 26432,26433,26434,26435,26436,26437,26438,26439,26440,26441,26442,26443, 26444,26445,26446,26447,26448,26449,26450,26451,26452,26453,26454,26455, 26456,26457,26458,26459,26460,26461,26462,26463,26464,26465,26466,26467, 26468,26469,26470,26471,26472,26473,26474,26475,26476,26477,26478,26479, 26480,26481,26482,26483,26484,26485,26486,26487,26488,26489,26490,26491, 26492,26493,26494,26495,26496,26497,26498,26499,26500,26501,26502,26503, 26504,26505,26506,26507,26508,26509,26510,26511,26512,26513,26514,26515, 26516,26517,26518,26519,26520,26521,26522,26523,26524,26525,26526,26527, 26528,26529,26530,26531,26532,26533,26534,26535,26536,26537,26538,26539, 26540,26541,26542,26543,26544,26545,26546,26547,26548,26549,26550,26551, 26552,26553,26554,26555,26556,26557,26558,26559,26560,26561,26562,26563, 26564,26565,26566,26567,26568,26569,26570,26571,26572,26573,26574,26575, 26576,26577,26578,26579,26580,26581,26582,26583,26584,26585,26586,26587, 26588,26589,26590,26591,26592,26593,26594,26595,26596,26597,26598,26599, 26600,26601,26602,26603,26604,26605,26606,26607,26608,26609,26610,26611, 26612,26613,26614,26615,26616,26617,26618,26619,26620,26621,26622,26623, 26624,26625,26626,26627,26628,26629,26630,26631,26632,26633,26634,26635, 26636,26637,26638,26639,26640,26641,26642,26643,26644,26645,26646,26647, 26648,26649,26650,26651,26652,26653,26654,26655,26656,26657,26658,26659, 26660,26661,26662,26663,26664,26665,26666,26667,26668,26669,26670,26671, 26672,26673,26674,26675,26676,26677,26678,26679,26680,26681,26682,26683, 26684,26685,26686,26687,26688,26689,26690,26691,26692,26693,26694,26695, 26696,26697,26698,26699,26700,26701,26702,26703,26704,26705,26706,26707, 26708,26709,26710,26711,26712,26713,26714,26715,26716,26717,26718,26719, 26720,26721,26722,26723,26724,26725,26726,26727,26728,26729,26730,26731, 26732,26733,26734,26735,26736,26737,26738,26739,26740,26741,26742,26743, 26744,26745,26746,26747,26748,26749,26750,26751,26752,26753,26754,26755, 26756,26757,26758,26759,26760,26761,26762,26763,26764,26765,26766,26767, 26768,26769,26770,26771,26772,26773,26774,26775,26776,26777,26778,26779, 26780,26781,26782,26783,26784,26785,26786,26787,26788,26789,26790,26791, 26792,26793,26794,26795,26796,26797,26798,26799,26800,26801,26802,26803, 26804,26805,26806,26807,26808,26809,26810,26811,26812,26813,26814,26815, 26816,26817,26818,26819,26820,26821,26822,26823,26824,26825,26826,26827, 26828,26829,26830,26831,26832,26833,26834,26835,26836,26837,26838,26839, 26840,26841,26842,26843,26844,26845,26846,26847,26848,26849,26850,26851, 26852,26853,26854,26855,26856,26857,26858,26859,26860,26861,26862,26863, 26864,26865,26866,26867,26868,26869,26870,26871,26872,26873,26874,26875, 26876,26877,26878,26879,26880,26881,26882,26883,26884,26885,26886,26887, 26888,26889,26890,26891,26892,26893,26894,26895,26896,26897,26898,26899, 26900,26901,26902,26903,26904,26905,26906,26907,26908,26909,26910,26911, 26912,26913,26914,26915,26916,26917,26918,26919,26920,26921,26922,26923, 26924,26925,26926,26927,26928,26929,26930,26931,26932,26933,26934,26935, 26936,26937,26938,26939,26940,26941,26942,26943,26944,26945,26946,26947, 26948,26949,26950,26951,26952,26953,26954,26955,26956,26957,26958,26959, 26960,26961,26962,26963,26964,26965,26966,26967,26968,26969,26970,26971, 26972,26973,26974,26975,26976,26977,26978,26979,26980,26981,26982,26983, 26984,26985,26986,26987,26988,26989,26990,26991,26992,26993,26994,26995, 26996,26997,26998,26999,27000,27001,27002,27003,27004,27005,27006,27007, 27008,27009,27010,27011,27012,27013,27014,27015,27016,27017,27018,27019, 27020,27021,27022,27023,27024,27025,27026,27027,27028,27029,27030,27031, 27032,27033,27034,27035,27036,27037,27038,27039,27040,27041,27042,27043, 27044,27045,27046,27047,27048,27049,27050,27051,27052,27053,27054,27055, 27056,27057,27058,27059,27060,27061,27062,27063,27064,27065,27066,27067, 27068,27069,27070,27071,27072,27073,27074,27075,27076,27077,27078,27079, 27080,27081,27082,27083,27084,27085,27086,27087,27088,27089,27090,27091, 27092,27093,27094,27095,27096,27097,27098,27099,27100,27101,27102,27103, 27104,27105,27106,27107,27108,27109,27110,27111,27112,27113,27114,27115, 27116,27117,27118,27119,27120,27121,27122,27123,27124,27125,27126,27127, 27128,27129,27130,27131,27132,27133,27134,27135,27136,27137,27138,27139, 27140,27141,27142,27143,27144,27145,27146,27147,27148,27149,27150,27151, 27152,27153,27154,27155,27156,27157,27158,27159,27160,27161,27162,27163, 27164,27165,27166,27167,27168,27169,27170,27171,27172,27173,27174,27175, 27176,27177,27178,27179,27180,27181,27182,27183,27184,27185,27186,27187, 27188,27189,27190,27191,27192,27193,27194,27195,27196,27197,27198,27199, 27200,27201,27202,27203,27204,27205,27206,27207,27208,27209,27210,27211, 27212,27213,27214,27215,27216,27217,27218,27219,27220,27221,27222,27223, 27224,27225,27226,27227,27228,27229,27230,27231,27232,27233,27234,27235, 27236,27237,27238,27239,27240,27241,27242,27243,27244,27245,27246,27247, 27248,27249,27250,27251,27252,27253,27254,27255,27256,27257,27258,27259, 27260,27261,27262,27263,27264,27265,27266,27267,27268,27269,27270,27271, 27272,27273,27274,27275,27276,27277,27278,27279,27280,27281,27282,27283, 27284,27285,27286,27287,27288,27289,27290,27291,27292,27293,27294,27295, 27296,27297,27298,27299,27300,27301,27302,27303,27304,27305,27306,27307, 27308,27309,27310,27311,27312,27313,27314,27315,27316,27317,27318,27319, 27320,27321,27322,27323,27324,27325,27326,27327,27328,27329,27330,27331, 27332,27333,27334,27335,27336,27337,27338,27339,27340,27341,27342,27343, 27344,27345,27346,27347,27348,27349,27350,27351,27352,27353,27354,27355, 27356,27357,27358,27359,27360,27361,27362,27363,27364,27365,27366,27367, 27368,27369,27370,27371,27372,27373,27374,27375,27376,27377,27378,27379, 27380,27381,27382,27383,27384,27385,27386,27387,27388,27389,27390,27391, 27392,27393,27394,27395,27396,27397,27398,27399,27400,27401,27402,27403, 27404,27405,27406,27407,27408,27409,27410,27411,27412,27413,27414,27415, 27416,27417,27418,27419,27420,27421,27422,27423,27424,27425,27426,27427, 27428,27429,27430,27431,27432,27433,27434,27435,27436,27437,27438,27439, 27440,27441,27442,27443,27444,27445,27446,27447,27448,27449,27450,27451, 27452,27453,27454,27455,27456,27457,27458,27459,27460,27461,27462,27463, 27464,27465,27466,27467,27468,27469,27470,27471,27472,27473,27474,27475, 27476,27477,27478,27479,27480,27481,27482,27483,27484,27485,27486,27487, 27488,27489,27490,27491,27492,27493,27494,27495,27496,27497,27498,27499, 27500,27501,27502,27503,27504,27505,27506,27507,27508,27509,27510,27511, 27512,27513,27514,27515,27516,27517,27518,27519,27520,27521,27522,27523, 27524,27525,27526,27527,27528,27529,27530,27531,27532,27533,27534,27535, 27536,27537,27538,27539,27540,27541,27542,27543,27544,27545,27546,27547, 27548,27549,27550,27551,27552,27553,27554,27555,27556,27557,27558,27559, 27560,27561,27562,27563,27564,27565,27566,27567,27568,27569,27570,27571, 27572,27573,27574,27575,27576,27577,27578,27579,27580,27581,27582,27583, 27584,27585,27586,27587,27588,27589,27590,27591,27592,27593,27594,27595, 27596,27597,27598,27599,27600,27601,27602,27603,27604,27605,27606,27607, 27608,27609,27610,27611,27612,27613,27614,27615,27616,27617,27618,27619, 27620,27621,27622,27623,27624,27625,27626,27627,27628,27629,27630,27631, 27632,27633,27634,27635,27636,27637,27638,27639,27640,27641,27642,27643, 27644,27645,27646,27647,27648,27649,27650,27651,27652,27653,27654,27655, 27656,27657,27658,27659,27660,27661,27662,27663,27664,27665,27666,27667, 27668,27669,27670,27671,27672,27673,27674,27675,27676,27677,27678,27679, 27680,27681,27682,27683,27684,27685,27686,27687,27688,27689,27690,27691, 27692,27693,27694,27695,27696,27697,27698,27699,27700,27701,27702,27703, 27704,27705,27706,27707,27708,27709,27710,27711,27712,27713,27714,27715, 27716,27717,27718,27719,27720,27721,27722,27723,27724,27725,27726,27727, 27728,27729,27730,27731,27732,27733,27734,27735,27736,27737,27738,27739, 27740,27741,27742,27743,27744,27745,27746,27747,27748,27749,27750,27751, 27752,27753,27754,27755,27756,27757,27758,27759,27760,27761,27762,27763, 27764,27765,27766,27767,27768,27769,27770,27771,27772,27773,27774,27775, 27776,27777,27778,27779,27780,27781,27782,27783,27784,27785,27786,27787, 27788,27789,27790,27791,27792,27793,27794,27795,27796,27797,27798,27799, 27800,27801,27802,27803,27804,27805,27806,27807,27808,27809,27810,27811, 27812,27813,27814,27815,27816,27817,27818,27819,27820,27821,27822,27823, 27824,27825,27826,27827,27828,27829,27830,27831,27832,27833,27834,27835, 27836,27837,27838,27839,27840,27841,27842,27843,27844,27845,27846,27847, 27848,27849,27850,27851,27852,27853,27854,27855,27856,27857,27858,27859, 27860,27861,27862,27863,27864,27865,27866,27867,27868,27869,27870,27871, 27872,27873,27874,27875,27876,27877,27878,27879,27880,27881,27882,27883, 27884,27885,27886,27887,27888,27889,27890,27891,27892,27893,27894,27895, 27896,27897,27898,27899,27900,27901,27902,27903,27904,27905,27906,27907, 27908,27909,27910,27911,27912,27913,27914,27915,27916,27917,27918,27919, 27920,27921,27922,27923,27924,27925,27926,27927,27928,27929,27930,27931, 27932,27933,27934,27935,27936,27937,27938,27939,27940,27941,27942,27943, 27944,27945,27946,27947,27948,27949,27950,27951,27952,27953,27954,27955, 27956,27957,27958,27959,27960,27961,27962,27963,27964,27965,27966,27967, 27968,27969,27970,27971,27972,27973,27974,27975,27976,27977,27978,27979, 27980,27981,27982,27983,27984,27985,27986,27987,27988,27989,27990,27991, 27992,27993,27994,27995,27996,27997,27998,27999,28000,28001,28002,28003, 28004,28005,28006,28007,28008,28009,28010,28011,28012,28013,28014,28015, 28016,28017,28018,28019,28020,28021,28022,28023,28024,28025,28026,28027, 28028,28029,28030,28031,28032,28033,28034,28035,28036,28037,28038,28039, 28040,28041,28042,28043,28044,28045,28046,28047,28048,28049,28050,28051, 28052,28053,28054,28055,28056,28057,28058,28059,28060,28061,28062,28063, 28064,28065,28066,28067,28068,28069,28070,28071,28072,28073,28074,28075, 28076,28077,28078,28079,28080,28081,28082,28083,28084,28085,28086,28087, 28088,28089,28090,28091,28092,28093,28094,28095,28096,28097,28098,28099, 28100,28101,28102,28103,28104,28105,28106,28107,28108,28109,28110,28111, 28112,28113,28114,28115,28116,28117,28118,28119,28120,28121,28122,28123, 28124,28125,28126,28127,28128,28129,28130,28131,28132,28133,28134,28135, 28136,28137,28138,28139,28140,28141,28142,28143,28144,28145,28146,28147, 28148,28149,28150,28151,28152,28153,28154,28155,28156,28157,28158,28159, 28160,28161,28162,28163,28164,28165,28166,28167,28168,28169,28170,28171, 28172,28173,28174,28175,28176,28177,28178,28179,28180,28181,28182,28183, 28184,28185,28186,28187,28188,28189,28190,28191,28192,28193,28194,28195, 28196,28197,28198,28199,28200,28201,28202,28203,28204,28205,28206,28207, 28208,28209,28210,28211,28212,28213,28214,28215,28216,28217,28218,28219, 28220,28221,28222,28223,28224,28225,28226,28227,28228,28229,28230,28231, 28232,28233,28234,28235,28236,28237,28238,28239,28240,28241,28242,28243, 28244,28245,28246,28247,28248,28249,28250,28251,28252,28253,28254,28255, 28256,28257,28258,28259,28260,28261,28262,28263,28264,28265,28266,28267, 28268,28269,28270,28271,28272,28273,28274,28275,28276,28277,28278,28279, 28280,28281,28282,28283,28284,28285,28286,28287,28288,28289,28290,28291, 28292,28293,28294,28295,28296,28297,28298,28299,28300,28301,28302,28303, 28304,28305,28306,28307,28308,28309,28310,28311,28312,28313,28314,28315, 28316,28317,28318,28319,28320,28321,28322,28323,28324,28325,28326,28327, 28328,28329,28330,28331,28332,28333,28334,28335,28336,28337,28338,28339, 28340,28341,28342,28343,28344,28345,28346,28347,28348,28349,28350,28351, 28352,28353,28354,28355,28356,28357,28358,28359,28360,28361,28362,28363, 28364,28365,28366,28367,28368,28369,28370,28371,28372,28373,28374,28375, 28376,28377,28378,28379,28380,28381,28382,28383,28384,28385,28386,28387, 28388,28389,28390,28391,28392,28393,28394,28395,28396,28397,28398,28399, 28400,28401,28402,28403,28404,28405,28406,28407,28408,28409,28410,28411, 28412,28413,28414,28415,28416,28417,28418,28419,28420,28421,28422,28423, 28424,28425,28426,28427,28428,28429,28430,28431,28432,28433,28434,28435, 28436,28437,28438,28439,28440,28441,28442,28443,28444,28445,28446,28447, 28448,28449,28450,28451,28452,28453,28454,28455,28456,28457,28458,28459, 28460,28461,28462,28463,28464,28465,28466,28467,28468,28469,28470,28471, 28472,28473,28474,28475,28476,28477,28478,28479,28480,28481,28482,28483, 28484,28485,28486,28487,28488,28489,28490,28491,28492,28493,28494,28495, 28496,28497,28498,28499,28500,28501,28502,28503,28504,28505,28506,28507, 28508,28509,28510,28511,28512,28513,28514,28515,28516,28517,28518,28519, 28520,28521,28522,28523,28524,28525,28526,28527,28528,28529,28530,28531, 28532,28533,28534,28535,28536,28537,28538,28539,28540,28541,28542,28543, 28544,28545,28546,28547,28548,28549,28550,28551,28552,28553,28554,28555, 28556,28557,28558,28559,28560,28561,28562,28563,28564,28565,28566,28567, 28568,28569,28570,28571,28572,28573,28574,28575,28576,28577,28578,28579, 28580,28581,28582,28583,28584,28585,28586,28587,28588,28589,28590,28591, 28592,28593,28594,28595,28596,28597,28598,28599,28600,28601,28602,28603, 28604,28605,28606,28607,28608,28609,28610,28611,28612,28613,28614,28615, 28616,28617,28618,28619,28620,28621,28622,28623,28624,28625,28626,28627, 28628,28629,28630,28631,28632,28633,28634,28635,28636,28637,28638,28639, 28640,28641,28642,28643,28644,28645,28646,28647,28648,28649,28650,28651, 28652,28653,28654,28655,28656,28657,28658,28659,28660,28661,28662,28663, 28664,28665,28666,28667,28668,28669,28670,28671,28672,28673,28674,28675, 28676,28677,28678,28679,28680,28681,28682,28683,28684,28685,28686,28687, 28688,28689,28690,28691,28692,28693,28694,28695,28696,28697,28698,28699, 28700,28701,28702,28703,28704,28705,28706,28707,28708,28709,28710,28711, 28712,28713,28714,28715,28716,28717,28718,28719,28720,28721,28722,28723, 28724,28725,28726,28727,28728,28729,28730,28731,28732,28733,28734,28735, 28736,28737,28738,28739,28740,28741,28742,28743,28744,28745,28746,28747, 28748,28749,28750,28751,28752,28753,28754,28755,28756,28757,28758,28759, 28760,28761,28762,28763,28764,28765,28766,28767,28768,28769,28770,28771, 28772,28773,28774,28775,28776,28777,28778,28779,28780,28781,28782,28783, 28784,28785,28786,28787,28788,28789,28790,28791,28792,28793,28794,28795, 28796,28797,28798,28799,28800,28801,28802,28803,28804,28805,28806,28807, 28808,28809,28810,28811,28812,28813,28814,28815,28816,28817,28818,28819, 28820,28821,28822,28823,28824,28825,28826,28827,28828,28829,28830,28831, 28832,28833,28834,28835,28836,28837,28838,28839,28840,28841,28842,28843, 28844,28845,28846,28847,28848,28849,28850,28851,28852,28853,28854,28855, 28856,28857,28858,28859,28860,28861,28862,28863,28864,28865,28866,28867, 28868,28869,28870,28871,28872,28873,28874,28875,28876,28877,28878,28879, 28880,28881,28882,28883,28884,28885,28886,28887,28888,28889,28890,28891, 28892,28893,28894,28895,28896,28897,28898,28899,28900,28901,28902,28903, 28904,28905,28906,28907,28908,28909,28910,28911,28912,28913,28914,28915, 28916,28917,28918,28919,28920,28921,28922,28923,28924,28925,28926,28927, 28928,28929,28930,28931,28932,28933,28934,28935,28936,28937,28938,28939, 28940,28941,28942,28943,28944,28945,28946,28947,28948,28949,28950,28951, 28952,28953,28954,28955,28956,28957,28958,28959,28960,28961,28962,28963, 28964,28965,28966,28967,28968,28969,28970,28971,28972,28973,28974,28975, 28976,28977,28978,28979,28980,28981,28982,28983,28984,28985,28986,28987, 28988,28989,28990,28991,28992,28993,28994,28995,28996,28997,28998,28999, 29000,29001,29002,29003,29004,29005,29006,29007,29008,29009,29010,29011, 29012,29013,29014,29015,29016,29017,29018,29019,29020,29021,29022,29023, 29024,29025,29026,29027,29028,29029,29030,29031,29032,29033,29034,29035, 29036,29037,29038,29039,29040,29041,29042,29043,29044,29045,29046,29047, 29048,29049,29050,29051,29052,29053,29054,29055,29056,29057,29058,29059, 29060,29061,29062,29063,29064,29065,29066,29067,29068,29069,29070,29071, 29072,29073,29074,29075,29076,29077,29078,29079,29080,29081,29082,29083, 29084,29085,29086,29087,29088,29089,29090,29091,29092,29093,29094,29095, 29096,29097,29098,29099,29100,29101,29102,29103,29104,29105,29106,29107, 29108,29109,29110,29111,29112,29113,29114,29115,29116,29117,29118,29119, 29120,29121,29122,29123,29124,29125,29126,29127,29128,29129,29130,29131, 29132,29133,29134,29135,29136,29137,29138,29139,29140,29141,29142,29143, 29144,29145,29146,29147,29148,29149,29150,29151,29152,29153,29154,29155, 29156,29157,29158,29159,29160,29161,29162,29163,29164,29165,29166,29167, 29168,29169,29170,29171,29172,29173,29174,29175,29176,29177,29178,29179, 29180,29181,29182,29183,29184,29185,29186,29187,29188,29189,29190,29191, 29192,29193,29194,29195,29196,29197,29198,29199,29200,29201,29202,29203, 29204,29205,29206,29207,29208,29209,29210,29211,29212,29213,29214,29215, 29216,29217,29218,29219,29220,29221,29222,29223,29224,29225,29226,29227, 29228,29229,29230,29231,29232,29233,29234,29235,29236,29237,29238,29239, 29240,29241,29242,29243,29244,29245,29246,29247,29248,29249,29250,29251, 29252,29253,29254,29255,29256,29257,29258,29259,29260,29261,29262,29263, 29264,29265,29266,29267,29268,29269,29270,29271,29272,29273,29274,29275, 29276,29277,29278,29279,29280,29281,29282,29283,29284,29285,29286,29287, 29288,29289,29290,29291,29292,29293,29294,29295,29296,29297,29298,29299, 29300,29301,29302,29303,29304,29305,29306,29307,29308,29309,29310,29311, 29312,29313,29314,29315,29316,29317,29318,29319,29320,29321,29322,29323, 29324,29325,29326,29327,29328,29329,29330,29331,29332,29333,29334,29335, 29336,29337,29338,29339,29340,29341,29342,29343,29344,29345,29346,29347, 29348,29349,29350,29351,29352,29353,29354,29355,29356,29357,29358,29359, 29360,29361,29362,29363,29364,29365,29366,29367,29368,29369,29370,29371, 29372,29373,29374,29375,29376,29377,29378,29379,29380,29381,29382,29383, 29384,29385,29386,29387,29388,29389,29390,29391,29392,29393,29394,29395, 29396,29397,29398,29399,29400,29401,29402,29403,29404,29405,29406,29407, 29408,29409,29410,29411,29412,29413,29414,29415,29416,29417,29418,29419, 29420,29421,29422,29423,29424,29425,29426,29427,29428,29429,29430,29431, 29432,29433,29434,29435,29436,29437,29438,29439,29440,29441,29442,29443, 29444,29445,29446,29447,29448,29449,29450,29451,29452,29453,29454,29455, 29456,29457,29458,29459,29460,29461,29462,29463,29464,29465,29466,29467, 29468,29469,29470,29471,29472,29473,29474,29475,29476,29477,29478,29479, 29480,29481,29482,29483,29484,29485,29486,29487,29488,29489,29490,29491, 29492,29493,29494,29495,29496,29497,29498,29499,29500,29501,29502,29503, 29504,29505,29506,29507,29508,29509,29510,29511,29512,29513,29514,29515, 29516,29517,29518,29519,29520,29521,29522,29523,29524,29525,29526,29527, 29528,29529,29530,29531,29532,29533,29534,29535,29536,29537,29538,29539, 29540,29541,29542,29543,29544,29545,29546,29547,29548,29549,29550,29551, 29552,29553,29554,29555,29556,29557,29558,29559,29560,29561,29562,29563, 29564,29565,29566,29567,29568,29569,29570,29571,29572,29573,29574,29575, 29576,29577,29578,29579,29580,29581,29582,29583,29584,29585,29586,29587, 29588,29589,29590,29591,29592,29593,29594,29595,29596,29597,29598,29599, 29600,29601,29602,29603,29604,29605,29606,29607,29608,29609,29610,29611, 29612,29613,29614,29615,29616,29617,29618,29619,29620,29621,29622,29623, 29624,29625,29626,29627,29628,29629,29630,29631,29632,29633,29634,29635, 29636,29637,29638,29639,29640,29641,29642,29643,29644,29645,29646,29647, 29648,29649,29650,29651,29652,29653,29654,29655,29656,29657,29658,29659, 29660,29661,29662,29663,29664,29665,29666,29667,29668,29669,29670,29671, 29672,29673,29674,29675,29676,29677,29678,29679,29680,29681,29682,29683, 29684,29685,29686,29687,29688,29689,29690,29691,29692,29693,29694,29695, 29696,29697,29698,29699,29700,29701,29702,29703,29704,29705,29706,29707, 29708,29709,29710,29711,29712,29713,29714,29715,29716,29717,29718,29719, 29720,29721,29722,29723,29724,29725,29726,29727,29728,29729,29730,29731, 29732,29733,29734,29735,29736,29737,29738,29739,29740,29741,29742,29743, 29744,29745,29746,29747,29748,29749,29750,29751,29752,29753,29754,29755, 29756,29757,29758,29759,29760,29761,29762,29763,29764,29765,29766,29767, 29768,29769,29770,29771,29772,29773,29774,29775,29776,29777,29778,29779, 29780,29781,29782,29783,29784,29785,29786,29787,29788,29789,29790,29791, 29792,29793,29794,29795,29796,29797,29798,29799,29800,29801,29802,29803, 29804,29805,29806,29807,29808,29809,29810,29811,29812,29813,29814,29815, 29816,29817,29818,29819,29820,29821,29822,29823,29824,29825,29826,29827, 29828,29829,29830,29831,29832,29833,29834,29835,29836,29837,29838,29839, 29840,29841,29842,29843,29844,29845,29846,29847,29848,29849,29850,29851, 29852,29853,29854,29855,29856,29857,29858,29859,29860,29861,29862,29863, 29864,29865,29866,29867,29868,29869,29870,29871,29872,29873,29874,29875, 29876,29877,29878,29879,29880,29881,29882,29883,29884,29885,29886,29887, 29888,29889,29890,29891,29892,29893,29894,29895,29896,29897,29898,29899, 29900,29901,29902,29903,29904,29905,29906,29907,29908,29909,29910,29911, 29912,29913,29914,29915,29916,29917,29918,29919,29920,29921,29922,29923, 29924,29925,29926,29927,29928,29929,29930,29931,29932,29933,29934,29935, 29936,29937,29938,29939,29940,29941,29942,29943,29944,29945,29946,29947, 29948,29949,29950,29951,29952,29953,29954,29955,29956,29957,29958,29959, 29960,29961,29962,29963,29964,29965,29966,29967,29968,29969,29970,29971, 29972,29973,29974,29975,29976,29977,29978,29979,29980,29981,29982,29983, 29984,29985,29986,29987,29988,29989,29990,29991,29992,29993,29994,29995, 29996,29997,29998,29999,30000,30001,30002,30003,30004,30005,30006,30007, 30008,30009,30010,30011,30012,30013,30014,30015,30016,30017,30018,30019, 30020,30021,30022,30023,30024,30025,30026,30027,30028,30029,30030,30031, 30032,30033,30034,30035,30036,30037,30038,30039,30040,30041,30042,30043, 30044,30045,30046,30047,30048,30049,30050,30051,30052,30053,30054,30055, 30056,30057,30058,30059,30060,30061,30062,30063,30064,30065,30066,30067, 30068,30069,30070,30071,30072,30073,30074,30075,30076,30077,30078,30079, 30080,30081,30082,30083,30084,30085,30086,30087,30088,30089,30090,30091, 30092,30093,30094,30095,30096,30097,30098,30099,30100,30101,30102,30103, 30104,30105,30106,30107,30108,30109,30110,30111,30112,30113,30114,30115, 30116,30117,30118,30119,30120,30121,30122,30123,30124,30125,30126,30127, 30128,30129,30130,30131,30132,30133,30134,30135,30136,30137,30138,30139, 30140,30141,30142,30143,30144,30145,30146,30147,30148,30149,30150,30151, 30152,30153,30154,30155,30156,30157,30158,30159,30160,30161,30162,30163, 30164,30165,30166,30167,30168,30169,30170,30171,30172,30173,30174,30175, 30176,30177,30178,30179,30180,30181,30182,30183,30184,30185,30186,30187, 30188,30189,30190,30191,30192,30193,30194,30195,30196,30197,30198,30199, 30200,30201,30202,30203,30204,30205,30206,30207,30208,30209,30210,30211, 30212,30213,30214,30215,30216,30217,30218,30219,30220,30221,30222,30223, 30224,30225,30226,30227,30228,30229,30230,30231,30232,30233,30234,30235, 30236,30237,30238,30239,30240,30241,30242,30243,30244,30245,30246,30247, 30248,30249,30250,30251,30252,30253,30254,30255,30256,30257,30258,30259, 30260,30261,30262,30263,30264,30265,30266,30267,30268,30269,30270,30271, 30272,30273,30274,30275,30276,30277,30278,30279,30280,30281,30282,30283, 30284,30285,30286,30287,30288,30289,30290,30291,30292,30293,30294,30295, 30296,30297,30298,30299,30300,30301,30302,30303,30304,30305,30306,30307, 30308,30309,30310,30311,30312,30313,30314,30315,30316,30317,30318,30319, 30320,30321,30322,30323,30324,30325,30326,30327,30328,30329,30330,30331, 30332,30333,30334,30335,30336,30337,30338,30339,30340,30341,30342,30343, 30344,30345,30346,30347,30348,30349,30350,30351,30352,30353,30354,30355, 30356,30357,30358,30359,30360,30361,30362,30363,30364,30365,30366,30367, 30368,30369,30370,30371,30372,30373,30374,30375,30376,30377,30378,30379, 30380,30381,30382,30383,30384,30385,30386,30387,30388,30389,30390,30391, 30392,30393,30394,30395,30396,30397,30398,30399,30400,30401,30402,30403, 30404,30405,30406,30407,30408,30409,30410,30411,30412,30413,30414,30415, 30416,30417,30418,30419,30420,30421,30422,30423,30424,30425,30426,30427, 30428,30429,30430,30431,30432,30433,30434,30435,30436,30437,30438,30439, 30440,30441,30442,30443,30444,30445,30446,30447,30448,30449,30450,30451, 30452,30453,30454,30455,30456,30457,30458,30459,30460,30461,30462,30463, 30464,30465,30466,30467,30468,30469,30470,30471,30472,30473,30474,30475, 30476,30477,30478,30479,30480,30481,30482,30483,30484,30485,30486,30487, 30488,30489,30490,30491,30492,30493,30494,30495,30496,30497,30498,30499, 30500,30501,30502,30503,30504,30505,30506,30507,30508,30509,30510,30511, 30512,30513,30514,30515,30516,30517,30518,30519,30520,30521,30522,30523, 30524,30525,30526,30527,30528,30529,30530,30531,30532,30533,30534,30535, 30536,30537,30538,30539,30540,30541,30542,30543,30544,30545,30546,30547, 30548,30549,30550,30551,30552,30553,30554,30555,30556,30557,30558,30559, 30560,30561,30562,30563,30564,30565,30566,30567,30568,30569,30570,30571, 30572,30573,30574,30575,30576,30577,30578,30579,30580,30581,30582,30583, 30584,30585,30586,30587,30588,30589,30590,30591,30592,30593,30594,30595, 30596,30597,30598,30599,30600,30601,30602,30603,30604,30605,30606,30607, 30608,30609,30610,30611,30612,30613,30614,30615,30616,30617,30618,30619, 30620,30621,30622,30623,30624,30625,30626,30627,30628,30629,30630,30631, 30632,30633,30634,30635,30636,30637,30638,30639,30640,30641,30642,30643, 30644,30645,30646,30647,30648,30649,30650,30651,30652,30653,30654,30655, 30656,30657,30658,30659,30660,30661,30662,30663,30664,30665,30666,30667, 30668,30669,30670,30671,30672,30673,30674,30675,30676,30677,30678,30679, 30680,30681,30682,30683,30684,30685,30686,30687,30688,30689,30690,30691, 30692,30693,30694,30695,30696,30697,30698,30699,30700,30701,30702,30703, 30704,30705,30706,30707,30708,30709,30710,30711,30712,30713,30714,30715, 30716,30717,30718,30719,30720,30721,30722,30723,30724,30725,30726,30727, 30728,30729,30730,30731,30732,30733,30734,30735,30736,30737,30738,30739, 30740,30741,30742,30743,30744,30745,30746,30747,30748,30749,30750,30751, 30752,30753,30754,30755,30756,30757,30758,30759,30760,30761,30762,30763, 30764,30765,30766,30767,30768,30769,30770,30771,30772,30773,30774,30775, 30776,30777,30778,30779,30780,30781,30782,30783,30784,30785,30786,30787, 30788,30789,30790,30791,30792,30793,30794,30795,30796,30797,30798,30799, 30800,30801,30802,30803,30804,30805,30806,30807,30808,30809,30810,30811, 30812,30813,30814,30815,30816,30817,30818,30819,30820,30821,30822,30823, 30824,30825,30826,30827,30828,30829,30830,30831,30832,30833,30834,30835, 30836,30837,30838,30839,30840,30841,30842,30843,30844,30845,30846,30847, 30848,30849,30850,30851,30852,30853,30854,30855,30856,30857,30858,30859, 30860,30861,30862,30863,30864,30865,30866,30867,30868,30869,30870,30871, 30872,30873,30874,30875,30876,30877,30878,30879,30880,30881,30882,30883, 30884,30885,30886,30887,30888,30889,30890,30891,30892,30893,30894,30895, 30896,30897,30898,30899,30900,30901,30902,30903,30904,30905,30906,30907, 30908,30909,30910,30911,30912,30913,30914,30915,30916,30917,30918,30919, 30920,30921,30922,30923,30924,30925,30926,30927,30928,30929,30930,30931, 30932,30933,30934,30935,30936,30937,30938,30939,30940,30941,30942,30943, 30944,30945,30946,30947,30948,30949,30950,30951,30952,30953,30954,30955, 30956,30957,30958,30959,30960,30961,30962,30963,30964,30965,30966,30967, 30968,30969,30970,30971,30972,30973,30974,30975,30976,30977,30978,30979, 30980,30981,30982,30983,30984,30985,30986,30987,30988,30989,30990,30991, 30992,30993,30994,30995,30996,30997,30998,30999,31000,31001,31002,31003, 31004,31005,31006,31007,31008,31009,31010,31011,31012,31013,31014,31015, 31016,31017,31018,31019,31020,31021,31022,31023,31024,31025,31026,31027, 31028,31029,31030,31031,31032,31033,31034,31035,31036,31037,31038,31039, 31040,31041,31042,31043,31044,31045,31046,31047,31048,31049,31050,31051, 31052,31053,31054,31055,31056,31057,31058,31059,31060,31061,31062,31063, 31064,31065,31066,31067,31068,31069,31070,31071,31072,31073,31074,31075, 31076,31077,31078,31079,31080,31081,31082,31083,31084,31085,31086,31087, 31088,31089,31090,31091,31092,31093,31094,31095,31096,31097,31098,31099, 31100,31101,31102,31103,31104,31105,31106,31107,31108,31109,31110,31111, 31112,31113,31114,31115,31116,31117,31118,31119,31120,31121,31122,31123, 31124,31125,31126,31127,31128,31129,31130,31131,31132,31133,31134,31135, 31136,31137,31138,31139,31140,31141,31142,31143,31144,31145,31146,31147, 31148,31149,31150,31151,31152,31153,31154,31155,31156,31157,31158,31159, 31160,31161,31162,31163,31164,31165,31166,31167,31168,31169,31170,31171, 31172,31173,31174,31175,31176,31177,31178,31179,31180,31181,31182,31183, 31184,31185,31186,31187,31188,31189,31190,31191,31192,31193,31194,31195, 31196,31197,31198,31199,31200,31201,31202,31203,31204,31205,31206,31207, 31208,31209,31210,31211,31212,31213,31214,31215,31216,31217,31218,31219, 31220,31221,31222,31223,31224,31225,31226,31227,31228,31229,31230,31231, 31232,31233,31234,31235,31236,31237,31238,31239,31240,31241,31242,31243, 31244,31245,31246,31247,31248,31249,31250,31251,31252,31253,31254,31255, 31256,31257,31258,31259,31260,31261,31262,31263,31264,31265,31266,31267, 31268,31269,31270,31271,31272,31273,31274,31275,31276,31277,31278,31279, 31280,31281,31282,31283,31284,31285,31286,31287,31288,31289,31290,31291, 31292,31293,31294,31295,31296,31297,31298,31299,31300,31301,31302,31303, 31304,31305,31306,31307,31308,31309,31310,31311,31312,31313,31314,31315, 31316,31317,31318,31319,31320,31321,31322,31323,31324,31325,31326,31327, 31328,31329,31330,31331,31332,31333,31334,31335,31336,31337,31338,31339, 31340,31341,31342,31343,31344,31345,31346,31347,31348,31349,31350,31351, 31352,31353,31354,31355,31356,31357,31358,31359,31360,31361,31362,31363, 31364,31365,31366,31367,31368,31369,31370,31371,31372,31373,31374,31375, 31376,31377,31378,31379,31380,31381,31382,31383,31384,31385,31386,31387, 31388,31389,31390,31391,31392,31393,31394,31395,31396,31397,31398,31399, 31400,31401,31402,31403,31404,31405,31406,31407,31408,31409,31410,31411, 31412,31413,31414,31415,31416,31417,31418,31419,31420,31421,31422,31423, 31424,31425,31426,31427,31428,31429,31430,31431,31432,31433,31434,31435, 31436,31437,31438,31439,31440,31441,31442,31443,31444,31445,31446,31447, 31448,31449,31450,31451,31452,31453,31454,31455,31456,31457,31458,31459, 31460,31461,31462,31463,31464,31465,31466,31467,31468,31469,31470,31471, 31472,31473,31474,31475,31476,31477,31478,31479,31480,31481,31482,31483, 31484,31485,31486,31487,31488,31489,31490,31491,31492,31493,31494,31495, 31496,31497,31498,31499,31500,31501,31502,31503,31504,31505,31506,31507, 31508,31509,31510,31511,31512,31513,31514,31515,31516,31517,31518,31519, 31520,31521,31522,31523,31524,31525,31526,31527,31528,31529,31530,31531, 31532,31533,31534,31535,31536,31537,31538,31539,31540,31541,31542,31543, 31544,31545,31546,31547,31548,31549,31550,31551,31552,31553,31554,31555, 31556,31557,31558,31559,31560,31561,31562,31563,31564,31565,31566,31567, 31568,31569,31570,31571,31572,31573,31574,31575,31576,31577,31578,31579, 31580,31581,31582,31583,31584,31585,31586,31587,31588,31589,31590,31591, 31592,31593,31594,31595,31596,31597,31598,31599,31600,31601,31602,31603, 31604,31605,31606,31607,31608,31609,31610,31611,31612,31613,31614,31615, 31616,31617,31618,31619,31620,31621,31622,31623,31624,31625,31626,31627, 31628,31629,31630,31631,31632,31633,31634,31635,31636,31637,31638,31639, 31640,31641,31642,31643,31644,31645,31646,31647,31648,31649,31650,31651, 31652,31653,31654,31655,31656,31657,31658,31659,31660,31661,31662,31663, 31664,31665,31666,31667,31668,31669,31670,31671,31672,31673,31674,31675, 31676,31677,31678,31679,31680,31681,31682,31683,31684,31685,31686,31687, 31688,31689,31690,31691,31692,31693,31694,31695,31696,31697,31698,31699, 31700,31701,31702,31703,31704,31705,31706,31707,31708,31709,31710,31711, 31712,31713,31714,31715,31716,31717,31718,31719,31720,31721,31722,31723, 31724,31725,31726,31727,31728,31729,31730,31731,31732,31733,31734,31735, 31736,31737,31738,31739,31740,31741,31742,31743,31744,31745,31746,31747, 31748,31749,31750,31751,31752,31753,31754,31755,31756,31757,31758,31759, 31760,31761,31762,31763,31764,31765,31766,31767,31768,31769,31770,31771, 31772,31773,31774,31775,31776,31777,31778,31779,31780,31781,31782,31783, 31784,31785,31786,31787,31788,31789,31790,31791,31792,31793,31794,31795, 31796,31797,31798,31799,31800,31801,31802,31803,31804,31805,31806,31807, 31808,31809,31810,31811,31812,31813,31814,31815,31816,31817,31818,31819, 31820,31821,31822,31823,31824,31825,31826,31827,31828,31829,31830,31831, 31832,31833,31834,31835,31836,31837,31838,31839,31840,31841,31842,31843, 31844,31845,31846,31847,31848,31849,31850,31851,31852,31853,31854,31855, 31856,31857,31858,31859,31860,31861,31862,31863,31864,31865,31866,31867, 31868,31869,31870,31871,31872,31873,31874,31875,31876,31877,31878,31879, 31880,31881,31882,31883,31884,31885,31886,31887,31888,31889,31890,31891, 31892,31893,31894,31895,31896,31897,31898,31899,31900,31901,31902,31903, 31904,31905,31906,31907,31908,31909,31910,31911,31912,31913,31914,31915, 31916,31917,31918,31919,31920,31921,31922,31923,31924,31925,31926,31927, 31928,31929,31930,31931,31932,31933,31934,31935,31936,31937,31938,31939, 31940,31941,31942,31943,31944,31945,31946,31947,31948,31949,31950,31951, 31952,31953,31954,31955,31956,31957,31958,31959,31960,31961,31962,31963, 31964,31965,31966,31967,31968,31969,31970,31971,31972,31973,31974,31975, 31976,31977,31978,31979,31980,31981,31982,31983,31984,31985,31986,31987, 31988,31989,31990,31991,31992,31993,31994,31995,31996,31997,31998,31999, 32000,32001,32002,32003,32004,32005,32006,32007,32008,32009,32010,32011, 32012,32013,32014,32015,32016,32017,32018,32019,32020,32021,32022,32023, 32024,32025,32026,32027,32028,32029,32030,32031,32032,32033,32034,32035, 32036,32037,32038,32039,32040,32041,32042,32043,32044,32045,32046,32047, 32048,32049,32050,32051,32052,32053,32054,32055,32056,32057,32058,32059, 32060,32061,32062,32063,32064,32065,32066,32067,32068,32069,32070,32071, 32072,32073,32074,32075,32076,32077,32078,32079,32080,32081,32082,32083, 32084,32085,32086,32087,32088,32089,32090,32091,32092,32093,32094,32095, 32096,32097,32098,32099,32100,32101,32102,32103,32104,32105,32106,32107, 32108,32109,32110,32111,32112,32113,32114,32115,32116,32117,32118,32119, 32120,32121,32122,32123,32124,32125,32126,32127,32128,32129,32130,32131, 32132,32133,32134,32135,32136,32137,32138,32139,32140,32141,32142,32143, 32144,32145,32146,32147,32148,32149,32150,32151,32152,32153,32154,32155, 32156,32157,32158,32159,32160,32161,32162,32163,32164,32165,32166,32167, 32168,32169,32170,32171,32172,32173,32174,32175,32176,32177,32178,32179, 32180,32181,32182,32183,32184,32185,32186,32187,32188,32189,32190,32191, 32192,32193,32194,32195,32196,32197,32198,32199,32200,32201,32202,32203, 32204,32205,32206,32207,32208,32209,32210,32211,32212,32213,32214,32215, 32216,32217,32218,32219,32220,32221,32222,32223,32224,32225,32226,32227, 32228,32229,32230,32231,32232,32233,32234,32235,32236,32237,32238,32239, 32240,32241,32242,32243,32244,32245,32246,32247,32248,32249,32250,32251, 32252,32253,32254,32255,32256,32257,32258,32259,32260,32261,32262,32263, 32264,32265,32266,32267,32268,32269,32270,32271,32272,32273,32274,32275, 32276,32277,32278,32279,32280,32281,32282,32283,32284,32285,32286,32287, 32288,32289,32290,32291,32292,32293,32294,32295,32296,32297,32298,32299, 32300,32301,32302,32303,32304,32305,32306,32307,32308,32309,32310,32311, 32312,32313,32314,32315,32316,32317,32318,32319,32320,32321,32322,32323, 32324,32325,32326,32327,32328,32329,32330,32331,32332,32333,32334,32335, 32336,32337,32338,32339,32340,32341,32342,32343,32344,32345,32346,32347, 32348,32349,32350,32351,32352,32353,32354,32355,32356,32357,32358,32359, 32360,32361,32362,32363,32364,32365,32366,32367,32368,32369,32370,32371, 32372,32373,32374,32375,32376,32377,32378,32379,32380,32381,32382,32383, 32384,32385,32386,32387,32388,32389,32390,32391,32392,32393,32394,32395, 32396,32397,32398,32399,32400,32401,32402,32403,32404,32405,32406,32407, 32408,32409,32410,32411,32412,32413,32414,32415,32416,32417,32418,32419, 32420,32421,32422,32423,32424,32425,32426,32427,32428,32429,32430,32431, 32432,32433,32434,32435,32436,32437,32438,32439,32440,32441,32442,32443, 32444,32445,32446,32447,32448,32449,32450,32451,32452,32453,32454,32455, 32456,32457,32458,32459,32460,32461,32462,32463,32464,32465,32466,32467, 32468,32469,32470,32471,32472,32473,32474,32475,32476,32477,32478,32479, 32480,32481,32482,32483,32484,32485,32486,32487,32488,32489,32490,32491, 32492,32493,32494,32495,32496,32497,32498,32499,32500,32501,32502,32503, 32504,32505,32506,32507,32508,32509,32510,32511,32512,32513,32514,32515, 32516,32517,32518,32519,32520,32521,32522,32523,32524,32525,32526,32527, 32528,32529,32530,32531,32532,32533,32534,32535,32536,32537,32538,32539, 32540,32541,32542,32543,32544,32545,32546,32547,32548,32549,32550,32551, 32552,32553,32554,32555,32556,32557,32558,32559,32560,32561,32562,32563, 32564,32565,32566,32567,32568,32569,32570,32571,32572,32573,32574,32575, 32576,32577,32578,32579,32580,32581,32582,32583,32584,32585,32586,32587, 32588,32589,32590,32591,32592,32593,32594,32595,32596,32597,32598,32599, 32600,32601,32602,32603,32604,32605,32606,32607,32608,32609,32610,32611, 32612,32613,32614,32615,32616,32617,32618,32619,32620,32621,32622,32623, 32624,32625,32626,32627,32628,32629,32630,32631,32632,32633,32634,32635, 32636,32637,32638,32639,32640,32641,32642,32643,32644,32645,32646,32647, 32648,32649,32650,32651,32652,32653,32654,32655,32656,32657,32658,32659, 32660,32661,32662,32663,32664,32665,32666,32667,32668,32669,32670,32671, 32672,32673,32674,32675,32676,32677,32678,32679,32680,32681,32682,32683, 32684,32685,32686,32687,32688,32689,32690,32691,32692,32693,32694,32695, 32696,32697,32698,32699,32700,32701,32702,32703,32704,32705,32706,32707, 32708,32709,32710,32711,32712,32713,32714,32715,32716,32717,32718,32719, 32720,32721,32722,32723,32724,32725,32726,32727,32728,32729,32730,32731, 32732,32733,32734,32735,32736,32737,32738,32739,32740,32741,32742,32743, 32744,32745,32746,32747,32748,32749,32750,32751,32752,32753,32754,32755, 32756,32757,32758,32759,32760,32761,32762,32763,32764,32765,32766,32767, 32768L,32769L,32770L,32771L,32772L,32773L,32774L,32775L,32776L,32777L, 32778L,32779L,32780L,32781L,32782L,32783L,32784L,32785L,32786L,32787L, 32788L,32789L,32790L,32791L,32792L,32793L,32794L,32795L,32796L,32797L, 32798L,32799L,32800L,32801L,32802L,32803L,32804L,32805L,32806L,32807L, 32808L,32809L,32810L,32811L,32812L,32813L,32814L,32815L,32816L,32817L, 32818L,32819L,32820L,32821L,32822L,32823L,32824L,32825L,32826L,32827L, 32828L,32829L,32830L,32831L,32832L,32833L,32834L,32835L,32836L,32837L, 32838L,32839L,32840L,32841L,32842L,32843L,32844L,32845L,32846L,32847L, 32848L,32849L,32850L,32851L,32852L,32853L,32854L,32855L,32856L,32857L, 32858L,32859L,32860L,32861L,32862L,32863L,32864L,32865L,32866L,32867L, 32868L,32869L,32870L,32871L,32872L,32873L,32874L,32875L,32876L,32877L, 32878L,32879L,32880L,32881L,32882L,32883L,32884L,32885L,32886L,32887L, 32888L,32889L,32890L,32891L,32892L,32893L,32894L,32895L,32896L,32897L, 32898L,32899L,32900L,32901L,32902L,32903L,32904L,32905L,32906L,32907L, 32908L,32909L,32910L,32911L,32912L,32913L,32914L,32915L,32916L,32917L, 32918L,32919L,32920L,32921L,32922L,32923L,32924L,32925L,32926L,32927L, 32928L,32929L,32930L,32931L,32932L,32933L,32934L,32935L,32936L,32937L, 32938L,32939L,32940L,32941L,32942L,32943L,32944L,32945L,32946L,32947L, 32948L,32949L,32950L,32951L,32952L,32953L,32954L,32955L,32956L,32957L, 32958L,32959L,32960L,32961L,32962L,32963L,32964L,32965L,32966L,32967L, 32968L,32969L,32970L,32971L,32972L,32973L,32974L,32975L,32976L,32977L, 32978L,32979L,32980L,32981L,32982L,32983L,32984L,32985L,32986L,32987L, 32988L,32989L,32990L,32991L,32992L,32993L,32994L,32995L,32996L,32997L, 32998L,32999L,33000L,33001L,33002L,33003L,33004L,33005L,33006L,33007L, 33008L,33009L,33010L,33011L,33012L,33013L,33014L,33015L,33016L,33017L, 33018L,33019L,33020L,33021L,33022L,33023L,33024L,33025L,33026L,33027L, 33028L,33029L,33030L,33031L,33032L,33033L,33034L,33035L,33036L,33037L, 33038L,33039L,33040L,33041L,33042L,33043L,33044L,33045L,33046L,33047L, 33048L,33049L,33050L,33051L,33052L,33053L,33054L,33055L,33056L,33057L, 33058L,33059L,33060L,33061L,33062L,33063L,33064L,33065L,33066L,33067L, 33068L,33069L,33070L,33071L,33072L,33073L,33074L,33075L,33076L,33077L, 33078L,33079L,33080L,33081L,33082L,33083L,33084L,33085L,33086L,33087L, 33088L,33089L,33090L,33091L,33092L,33093L,33094L,33095L,33096L,33097L, 33098L,33099L,33100L,33101L,33102L,33103L,33104L,33105L,33106L,33107L, 33108L,33109L,33110L,33111L,33112L,33113L,33114L,33115L,33116L,33117L, 33118L,33119L,33120L,33121L,33122L,33123L,33124L,33125L,33126L,33127L, 33128L,33129L,33130L,33131L,33132L,33133L,33134L,33135L,33136L,33137L, 33138L,33139L,33140L,33141L,33142L,33143L,33144L,33145L,33146L,33147L, 33148L,33149L,33150L,33151L,33152L,33153L,33154L,33155L,33156L,33157L, 33158L,33159L,33160L,33161L,33162L,33163L,33164L,33165L,33166L,33167L, 33168L,33169L,33170L,33171L,33172L,33173L,33174L,33175L,33176L,33177L, 33178L,33179L,33180L,33181L,33182L,33183L,33184L,33185L,33186L,33187L, 33188L,33189L,33190L,33191L,33192L,33193L,33194L,33195L,33196L,33197L, 33198L,33199L,33200L,33201L,33202L,33203L,33204L,33205L,33206L,33207L, 33208L,33209L,33210L,33211L,33212L,33213L,33214L,33215L,33216L,33217L, 33218L,33219L,33220L,33221L,33222L,33223L,33224L,33225L,33226L,33227L, 33228L,33229L,33230L,33231L,33232L,33233L,33234L,33235L,33236L,33237L, 33238L,33239L,33240L,33241L,33242L,33243L,33244L,33245L,33246L,33247L, 33248L,33249L,33250L,33251L,33252L,33253L,33254L,33255L,33256L,33257L, 33258L,33259L,33260L,33261L,33262L,33263L,33264L,33265L,33266L,33267L, 33268L,33269L,33270L,33271L,33272L,33273L,33274L,33275L,33276L,33277L, 33278L,33279L,33280L,33281L,33282L,33283L,33284L,33285L,33286L,33287L, 33288L,33289L,33290L,33291L,33292L,33293L,33294L,33295L,33296L,33297L, 33298L,33299L,33300L,33301L,33302L,33303L,33304L,33305L,33306L,33307L, 33308L,33309L,33310L,33311L,33312L,33313L,33314L,33315L,33316L,33317L, 33318L,33319L,33320L,33321L,33322L,33323L,33324L,33325L,33326L,33327L, 33328L,33329L,33330L,33331L,33332L,33333L,33334L,33335L,33336L,33337L, 33338L,33339L,33340L,33341L,33342L,33343L,33344L,33345L,33346L,33347L, 33348L,33349L,33350L,33351L,33352L,33353L,33354L,33355L,33356L,33357L, 33358L,33359L,33360L,33361L,33362L,33363L,33364L,33365L,33366L,33367L, 33368L,33369L,33370L,33371L,33372L,33373L,33374L,33375L,33376L,33377L, 33378L,33379L,33380L,33381L,33382L,33383L,33384L,33385L,33386L,33387L, 33388L,33389L,33390L,33391L,33392L,33393L,33394L,33395L,33396L,33397L, 33398L,33399L,33400L,33401L,33402L,33403L,33404L,33405L,33406L,33407L, 33408L,33409L,33410L,33411L,33412L,33413L,33414L,33415L,33416L,33417L, 33418L,33419L,33420L,33421L,33422L,33423L,33424L,33425L,33426L,33427L, 33428L,33429L,33430L,33431L,33432L,33433L,33434L,33435L,33436L,33437L, 33438L,33439L,33440L,33441L,33442L,33443L,33444L,33445L,33446L,33447L, 33448L,33449L,33450L,33451L,33452L,33453L,33454L,33455L,33456L,33457L, 33458L,33459L,33460L,33461L,33462L,33463L,33464L,33465L,33466L,33467L, 33468L,33469L,33470L,33471L,33472L,33473L,33474L,33475L,33476L,33477L, 33478L,33479L,33480L,33481L,33482L,33483L,33484L,33485L,33486L,33487L, 33488L,33489L,33490L,33491L,33492L,33493L,33494L,33495L,33496L,33497L, 33498L,33499L,33500L,33501L,33502L,33503L,33504L,33505L,33506L,33507L, 33508L,33509L,33510L,33511L,33512L,33513L,33514L,33515L,33516L,33517L, 33518L,33519L,33520L,33521L,33522L,33523L,33524L,33525L,33526L,33527L, 33528L,33529L,33530L,33531L,33532L,33533L,33534L,33535L,33536L,33537L, 33538L,33539L,33540L,33541L,33542L,33543L,33544L,33545L,33546L,33547L, 33548L,33549L,33550L,33551L,33552L,33553L,33554L,33555L,33556L,33557L, 33558L,33559L,33560L,33561L,33562L,33563L,33564L,33565L,33566L,33567L, 33568L,33569L,33570L,33571L,33572L,33573L,33574L,33575L,33576L,33577L, 33578L,33579L,33580L,33581L,33582L,33583L,33584L,33585L,33586L,33587L, 33588L,33589L,33590L,33591L,33592L,33593L,33594L,33595L,33596L,33597L, 33598L,33599L,33600L,33601L,33602L,33603L,33604L,33605L,33606L,33607L, 33608L,33609L,33610L,33611L,33612L,33613L,33614L,33615L,33616L,33617L, 33618L,33619L,33620L,33621L,33622L,33623L,33624L,33625L,33626L,33627L, 33628L,33629L,33630L,33631L,33632L,33633L,33634L,33635L,33636L,33637L, 33638L,33639L,33640L,33641L,33642L,33643L,33644L,33645L,33646L,33647L, 33648L,33649L,33650L,33651L,33652L,33653L,33654L,33655L,33656L,33657L, 33658L,33659L,33660L,33661L,33662L,33663L,33664L,33665L,33666L,33667L, 33668L,33669L,33670L,33671L,33672L,33673L,33674L,33675L,33676L,33677L, 33678L,33679L,33680L,33681L,33682L,33683L,33684L,33685L,33686L,33687L, 33688L,33689L,33690L,33691L,33692L,33693L,33694L,33695L,33696L,33697L, 33698L,33699L,33700L,33701L,33702L,33703L,33704L,33705L,33706L,33707L, 33708L,33709L,33710L,33711L,33712L,33713L,33714L,33715L,33716L,33717L, 33718L,33719L,33720L,33721L,33722L,33723L,33724L,33725L,33726L,33727L, 33728L,33729L,33730L,33731L,33732L,33733L,33734L,33735L,33736L,33737L, 33738L,33739L,33740L,33741L,33742L,33743L,33744L,33745L,33746L,33747L, 33748L,33749L,33750L,33751L,33752L,33753L,33754L,33755L,33756L,33757L, 33758L,33759L,33760L,33761L,33762L,33763L,33764L,33765L,33766L,33767L, 33768L,33769L,33770L,33771L,33772L,33773L,33774L,33775L,33776L,33777L, 33778L,33779L,33780L,33781L,33782L,33783L,33784L,33785L,33786L,33787L, 33788L,33789L,33790L,33791L,33792L,33793L,33794L,33795L,33796L,33797L, 33798L,33799L,33800L,33801L,33802L,33803L,33804L,33805L,33806L,33807L, 33808L,33809L,33810L,33811L,33812L,33813L,33814L,33815L,33816L,33817L, 33818L,33819L,33820L,33821L,33822L,33823L,33824L,33825L,33826L,33827L, 33828L,33829L,33830L,33831L,33832L,33833L,33834L,33835L,33836L,33837L, 33838L,33839L,33840L,33841L,33842L,33843L,33844L,33845L,33846L,33847L, 33848L,33849L,33850L,33851L,33852L,33853L,33854L,33855L,33856L,33857L, 33858L,33859L,33860L,33861L,33862L,33863L,33864L,33865L,33866L,33867L, 33868L,33869L,33870L,33871L,33872L,33873L,33874L,33875L,33876L,33877L, 33878L,33879L,33880L,33881L,33882L,33883L,33884L,33885L,33886L,33887L, 33888L,33889L,33890L,33891L,33892L,33893L,33894L,33895L,33896L,33897L, 33898L,33899L,33900L,33901L,33902L,33903L,33904L,33905L,33906L,33907L, 33908L,33909L,33910L,33911L,33912L,33913L,33914L,33915L,33916L,33917L, 33918L,33919L,33920L,33921L,33922L,33923L,33924L,33925L,33926L,33927L, 33928L,33929L,33930L,33931L,33932L,33933L,33934L,33935L,33936L,33937L, 33938L,33939L,33940L,33941L,33942L,33943L,33944L,33945L,33946L,33947L, 33948L,33949L,33950L,33951L,33952L,33953L,33954L,33955L,33956L,33957L, 33958L,33959L,33960L,33961L,33962L,33963L,33964L,33965L,33966L,33967L, 33968L,33969L,33970L,33971L,33972L,33973L,33974L,33975L,33976L,33977L, 33978L,33979L,33980L,33981L,33982L,33983L,33984L,33985L,33986L,33987L, 33988L,33989L,33990L,33991L,33992L,33993L,33994L,33995L,33996L,33997L, 33998L,33999L,34000L,34001L,34002L,34003L,34004L,34005L,34006L,34007L, 34008L,34009L,34010L,34011L,34012L,34013L,34014L,34015L,34016L,34017L, 34018L,34019L,34020L,34021L,34022L,34023L,34024L,34025L,34026L,34027L, 34028L,34029L,34030L,34031L,34032L,34033L,34034L,34035L,34036L,34037L, 34038L,34039L,34040L,34041L,34042L,34043L,34044L,34045L,34046L,34047L, 34048L,34049L,34050L,34051L,34052L,34053L,34054L,34055L,34056L,34057L, 34058L,34059L,34060L,34061L,34062L,34063L,34064L,34065L,34066L,34067L, 34068L,34069L,34070L,34071L,34072L,34073L,34074L,34075L,34076L,34077L, 34078L,34079L,34080L,34081L,34082L,34083L,34084L,34085L,34086L,34087L, 34088L,34089L,34090L,34091L,34092L,34093L,34094L,34095L,34096L,34097L, 34098L,34099L,34100L,34101L,34102L,34103L,34104L,34105L,34106L,34107L, 34108L,34109L,34110L,34111L,34112L,34113L,34114L,34115L,34116L,34117L, 34118L,34119L,34120L,34121L,34122L,34123L,34124L,34125L,34126L,34127L, 34128L,34129L,34130L,34131L,34132L,34133L,34134L,34135L,34136L,34137L, 34138L,34139L,34140L,34141L,34142L,34143L,34144L,34145L,34146L,34147L, 34148L,34149L,34150L,34151L,34152L,34153L,34154L,34155L,34156L,34157L, 34158L,34159L,34160L,34161L,34162L,34163L,34164L,34165L,34166L,34167L, 34168L,34169L,34170L,34171L,34172L,34173L,34174L,34175L,34176L,34177L, 34178L,34179L,34180L,34181L,34182L,34183L,34184L,34185L,34186L,34187L, 34188L,34189L,34190L,34191L,34192L,34193L,34194L,34195L,34196L,34197L, 34198L,34199L,34200L,34201L,34202L,34203L,34204L,34205L,34206L,34207L, 34208L,34209L,34210L,34211L,34212L,34213L,34214L,34215L,34216L,34217L, 34218L,34219L,34220L,34221L,34222L,34223L,34224L,34225L,34226L,34227L, 34228L,34229L,34230L,34231L,34232L,34233L,34234L,34235L,34236L,34237L, 34238L,34239L,34240L,34241L,34242L,34243L,34244L,34245L,34246L,34247L, 34248L,34249L,34250L,34251L,34252L,34253L,34254L,34255L,34256L,34257L, 34258L,34259L,34260L,34261L,34262L,34263L,34264L,34265L,34266L,34267L, 34268L,34269L,34270L,34271L,34272L,34273L,34274L,34275L,34276L,34277L, 34278L,34279L,34280L,34281L,34282L,34283L,34284L,34285L,34286L,34287L, 34288L,34289L,34290L,34291L,34292L,34293L,34294L,34295L,34296L,34297L, 34298L,34299L,34300L,34301L,34302L,34303L,34304L,34305L,34306L,34307L, 34308L,34309L,34310L,34311L,34312L,34313L,34314L,34315L,34316L,34317L, 34318L,34319L,34320L,34321L,34322L,34323L,34324L,34325L,34326L,34327L, 34328L,34329L,34330L,34331L,34332L,34333L,34334L,34335L,34336L,34337L, 34338L,34339L,34340L,34341L,34342L,34343L,34344L,34345L,34346L,34347L, 34348L,34349L,34350L,34351L,34352L,34353L,34354L,34355L,34356L,34357L, 34358L,34359L,34360L,34361L,34362L,34363L,34364L,34365L,34366L,34367L, 34368L,34369L,34370L,34371L,34372L,34373L,34374L,34375L,34376L,34377L, 34378L,34379L,34380L,34381L,34382L,34383L,34384L,34385L,34386L,34387L, 34388L,34389L,34390L,34391L,34392L,34393L,34394L,34395L,34396L,34397L, 34398L,34399L,34400L,34401L,34402L,34403L,34404L,34405L,34406L,34407L, 34408L,34409L,34410L,34411L,34412L,34413L,34414L,34415L,34416L,34417L, 34418L,34419L,34420L,34421L,34422L,34423L,34424L,34425L,34426L,34427L, 34428L,34429L,34430L,34431L,34432L,34433L,34434L,34435L,34436L,34437L, 34438L,34439L,34440L,34441L,34442L,34443L,34444L,34445L,34446L,34447L, 34448L,34449L,34450L,34451L,34452L,34453L,34454L,34455L,34456L,34457L, 34458L,34459L,34460L,34461L,34462L,34463L,34464L,34465L,34466L,34467L, 34468L,34469L,34470L,34471L,34472L,34473L,34474L,34475L,34476L,34477L, 34478L,34479L,34480L,34481L,34482L,34483L,34484L,34485L,34486L,34487L, 34488L,34489L,34490L,34491L,34492L,34493L,34494L,34495L,34496L,34497L, 34498L,34499L,34500L,34501L,34502L,34503L,34504L,34505L,34506L,34507L, 34508L,34509L,34510L,34511L,34512L,34513L,34514L,34515L,34516L,34517L, 34518L,34519L,34520L,34521L,34522L,34523L,34524L,34525L,34526L,34527L, 34528L,34529L,34530L,34531L,34532L,34533L,34534L,34535L,34536L,34537L, 34538L,34539L,34540L,34541L,34542L,34543L,34544L,34545L,34546L,34547L, 34548L,34549L,34550L,34551L,34552L,34553L,34554L,34555L,34556L,34557L, 34558L,34559L,34560L,34561L,34562L,34563L,34564L,34565L,34566L,34567L, 34568L,34569L,34570L,34571L,34572L,34573L,34574L,34575L,34576L,34577L, 34578L,34579L,34580L,34581L,34582L,34583L,34584L,34585L,34586L,34587L, 34588L,34589L,34590L,34591L,34592L,34593L,34594L,34595L,34596L,34597L, 34598L,34599L,34600L,34601L,34602L,34603L,34604L,34605L,34606L,34607L, 34608L,34609L,34610L,34611L,34612L,34613L,34614L,34615L,34616L,34617L, 34618L,34619L,34620L,34621L,34622L,34623L,34624L,34625L,34626L,34627L, 34628L,34629L,34630L,34631L,34632L,34633L,34634L,34635L,34636L,34637L, 34638L,34639L,34640L,34641L,34642L,34643L,34644L,34645L,34646L,34647L, 34648L,34649L,34650L,34651L,34652L,34653L,34654L,34655L,34656L,34657L, 34658L,34659L,34660L,34661L,34662L,34663L,34664L,34665L,34666L,34667L, 34668L,34669L,34670L,34671L,34672L,34673L,34674L,34675L,34676L,34677L, 34678L,34679L,34680L,34681L,34682L,34683L,34684L,34685L,34686L,34687L, 34688L,34689L,34690L,34691L,34692L,34693L,34694L,34695L,34696L,34697L, 34698L,34699L,34700L,34701L,34702L,34703L,34704L,34705L,34706L,34707L, 34708L,34709L,34710L,34711L,34712L,34713L,34714L,34715L,34716L,34717L, 34718L,34719L,34720L,34721L,34722L,34723L,34724L,34725L,34726L,34727L, 34728L,34729L,34730L,34731L,34732L,34733L,34734L,34735L,34736L,34737L, 34738L,34739L,34740L,34741L,34742L,34743L,34744L,34745L,34746L,34747L, 34748L,34749L,34750L,34751L,34752L,34753L,34754L,34755L,34756L,34757L, 34758L,34759L,34760L,34761L,34762L,34763L,34764L,34765L,34766L,34767L, 34768L,34769L,34770L,34771L,34772L,34773L,34774L,34775L,34776L,34777L, 34778L,34779L,34780L,34781L,34782L,34783L,34784L,34785L,34786L,34787L, 34788L,34789L,34790L,34791L,34792L,34793L,34794L,34795L,34796L,34797L, 34798L,34799L,34800L,34801L,34802L,34803L,34804L,34805L,34806L,34807L, 34808L,34809L,34810L,34811L,34812L,34813L,34814L,34815L,34816L,34817L, 34818L,34819L,34820L,34821L,34822L,34823L,34824L,34825L,34826L,34827L, 34828L,34829L,34830L,34831L,34832L,34833L,34834L,34835L,34836L,34837L, 34838L,34839L,34840L,34841L,34842L,34843L,34844L,34845L,34846L,34847L, 34848L,34849L,34850L,34851L,34852L,34853L,34854L,34855L,34856L,34857L, 34858L,34859L,34860L,34861L,34862L,34863L,34864L,34865L,34866L,34867L, 34868L,34869L,34870L,34871L,34872L,34873L,34874L,34875L,34876L,34877L, 34878L,34879L,34880L,34881L,34882L,34883L,34884L,34885L,34886L,34887L, 34888L,34889L,34890L,34891L,34892L,34893L,34894L,34895L,34896L,34897L, 34898L,34899L,34900L,34901L,34902L,34903L,34904L,34905L,34906L,34907L, 34908L,34909L,34910L,34911L,34912L,34913L,34914L,34915L,34916L,34917L, 34918L,34919L,34920L,34921L,34922L,34923L,34924L,34925L,34926L,34927L, 34928L,34929L,34930L,34931L,34932L,34933L,34934L,34935L,34936L,34937L, 34938L,34939L,34940L,34941L,34942L,34943L,34944L,34945L,34946L,34947L, 34948L,34949L,34950L,34951L,34952L,34953L,34954L,34955L,34956L,34957L, 34958L,34959L,34960L,34961L,34962L,34963L,34964L,34965L,34966L,34967L, 34968L,34969L,34970L,34971L,34972L,34973L,34974L,34975L,34976L,34977L, 34978L,34979L,34980L,34981L,34982L,34983L,34984L,34985L,34986L,34987L, 34988L,34989L,34990L,34991L,34992L,34993L,34994L,34995L,34996L,34997L, 34998L,34999L,35000L,35001L,35002L,35003L,35004L,35005L,35006L,35007L, 35008L,35009L,35010L,35011L,35012L,35013L,35014L,35015L,35016L,35017L, 35018L,35019L,35020L,35021L,35022L,35023L,35024L,35025L,35026L,35027L, 35028L,35029L,35030L,35031L,35032L,35033L,35034L,35035L,35036L,35037L, 35038L,35039L,35040L,35041L,35042L,35043L,35044L,35045L,35046L,35047L, 35048L,35049L,35050L,35051L,35052L,35053L,35054L,35055L,35056L,35057L, 35058L,35059L,35060L,35061L,35062L,35063L,35064L,35065L,35066L,35067L, 35068L,35069L,35070L,35071L,35072L,35073L,35074L,35075L,35076L,35077L, 35078L,35079L,35080L,35081L,35082L,35083L,35084L,35085L,35086L,35087L, 35088L,35089L,35090L,35091L,35092L,35093L,35094L,35095L,35096L,35097L, 35098L,35099L,35100L,35101L,35102L,35103L,35104L,35105L,35106L,35107L, 35108L,35109L,35110L,35111L,35112L,35113L,35114L,35115L,35116L,35117L, 35118L,35119L,35120L,35121L,35122L,35123L,35124L,35125L,35126L,35127L, 35128L,35129L,35130L,35131L,35132L,35133L,35134L,35135L,35136L,35137L, 35138L,35139L,35140L,35141L,35142L,35143L,35144L,35145L,35146L,35147L, 35148L,35149L,35150L,35151L,35152L,35153L,35154L,35155L,35156L,35157L, 35158L,35159L,35160L,35161L,35162L,35163L,35164L,35165L,35166L,35167L, 35168L,35169L,35170L,35171L,35172L,35173L,35174L,35175L,35176L,35177L, 35178L,35179L,35180L,35181L,35182L,35183L,35184L,35185L,35186L,35187L, 35188L,35189L,35190L,35191L,35192L,35193L,35194L,35195L,35196L,35197L, 35198L,35199L,35200L,35201L,35202L,35203L,35204L,35205L,35206L,35207L, 35208L,35209L,35210L,35211L,35212L,35213L,35214L,35215L,35216L,35217L, 35218L,35219L,35220L,35221L,35222L,35223L,35224L,35225L,35226L,35227L, 35228L,35229L,35230L,35231L,35232L,35233L,35234L,35235L,35236L,35237L, 35238L,35239L,35240L,35241L,35242L,35243L,35244L,35245L,35246L,35247L, 35248L,35249L,35250L,35251L,35252L,35253L,35254L,35255L,35256L,35257L, 35258L,35259L,35260L,35261L,35262L,35263L,35264L,35265L,35266L,35267L, 35268L,35269L,35270L,35271L,35272L,35273L,35274L,35275L,35276L,35277L, 35278L,35279L,35280L,35281L,35282L,35283L,35284L,35285L,35286L,35287L, 35288L,35289L,35290L,35291L,35292L,35293L,35294L,35295L,35296L,35297L, 35298L,35299L,35300L,35301L,35302L,35303L,35304L,35305L,35306L,35307L, 35308L,35309L,35310L,35311L,35312L,35313L,35314L,35315L,35316L,35317L, 35318L,35319L,35320L,35321L,35322L,35323L,35324L,35325L,35326L,35327L, 35328L,35329L,35330L,35331L,35332L,35333L,35334L,35335L,35336L,35337L, 35338L,35339L,35340L,35341L,35342L,35343L,35344L,35345L,35346L,35347L, 35348L,35349L,35350L,35351L,35352L,35353L,35354L,35355L,35356L,35357L, 35358L,35359L,35360L,35361L,35362L,35363L,35364L,35365L,35366L,35367L, 35368L,35369L,35370L,35371L,35372L,35373L,35374L,35375L,35376L,35377L, 35378L,35379L,35380L,35381L,35382L,35383L,35384L,35385L,35386L,35387L, 35388L,35389L,35390L,35391L,35392L,35393L,35394L,35395L,35396L,35397L, 35398L,35399L,35400L,35401L,35402L,35403L,35404L,35405L,35406L,35407L, 35408L,35409L,35410L,35411L,35412L,35413L,35414L,35415L,35416L,35417L, 35418L,35419L,35420L,35421L,35422L,35423L,35424L,35425L,35426L,35427L, 35428L,35429L,35430L,35431L,35432L,35433L,35434L,35435L,35436L,35437L, 35438L,35439L,35440L,35441L,35442L,35443L,35444L,35445L,35446L,35447L, 35448L,35449L,35450L,35451L,35452L,35453L,35454L,35455L,35456L,35457L, 35458L,35459L,35460L,35461L,35462L,35463L,35464L,35465L,35466L,35467L, 35468L,35469L,35470L,35471L,35472L,35473L,35474L,35475L,35476L,35477L, 35478L,35479L,35480L,35481L,35482L,35483L,35484L,35485L,35486L,35487L, 35488L,35489L,35490L,35491L,35492L,35493L,35494L,35495L,35496L,35497L, 35498L,35499L,35500L,35501L,35502L,35503L,35504L,35505L,35506L,35507L, 35508L,35509L,35510L,35511L,35512L,35513L,35514L,35515L,35516L,35517L, 35518L,35519L,35520L,35521L,35522L,35523L,35524L,35525L,35526L,35527L, 35528L,35529L,35530L,35531L,35532L,35533L,35534L,35535L,35536L,35537L, 35538L,35539L,35540L,35541L,35542L,35543L,35544L,35545L,35546L,35547L, 35548L,35549L,35550L,35551L,35552L,35553L,35554L,35555L,35556L,35557L, 35558L,35559L,35560L,35561L,35562L,35563L,35564L,35565L,35566L,35567L, 35568L,35569L,35570L,35571L,35572L,35573L,35574L,35575L,35576L,35577L, 35578L,35579L,35580L,35581L,35582L,35583L,35584L,35585L,35586L,35587L, 35588L,35589L,35590L,35591L,35592L,35593L,35594L,35595L,35596L,35597L, 35598L,35599L,35600L,35601L,35602L,35603L,35604L,35605L,35606L,35607L, 35608L,35609L,35610L,35611L,35612L,35613L,35614L,35615L,35616L,35617L, 35618L,35619L,35620L,35621L,35622L,35623L,35624L,35625L,35626L,35627L, 35628L,35629L,35630L,35631L,35632L,35633L,35634L,35635L,35636L,35637L, 35638L,35639L,35640L,35641L,35642L,35643L,35644L,35645L,35646L,35647L, 35648L,35649L,35650L,35651L,35652L,35653L,35654L,35655L,35656L,35657L, 35658L,35659L,35660L,35661L,35662L,35663L,35664L,35665L,35666L,35667L, 35668L,35669L,35670L,35671L,35672L,35673L,35674L,35675L,35676L,35677L, 35678L,35679L,35680L,35681L,35682L,35683L,35684L,35685L,35686L,35687L, 35688L,35689L,35690L,35691L,35692L,35693L,35694L,35695L,35696L,35697L, 35698L,35699L,35700L,35701L,35702L,35703L,35704L,35705L,35706L,35707L, 35708L,35709L,35710L,35711L,35712L,35713L,35714L,35715L,35716L,35717L, 35718L,35719L,35720L,35721L,35722L,35723L,35724L,35725L,35726L,35727L, 35728L,35729L,35730L,35731L,35732L,35733L,35734L,35735L,35736L,35737L, 35738L,35739L,35740L,35741L,35742L,35743L,35744L,35745L,35746L,35747L, 35748L,35749L,35750L,35751L,35752L,35753L,35754L,35755L,35756L,35757L, 35758L,35759L,35760L,35761L,35762L,35763L,35764L,35765L,35766L,35767L, 35768L,35769L,35770L,35771L,35772L,35773L,35774L,35775L,35776L,35777L, 35778L,35779L,35780L,35781L,35782L,35783L,35784L,35785L,35786L,35787L, 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35928L,35929L,35930L,35931L,35932L,35933L,35934L,35935L,35936L,35937L, 35938L,35939L,35940L,35941L,35942L,35943L,35944L,35945L,35946L,35947L, 35948L,35949L,35950L,35951L,35952L,35953L,35954L,35955L,35956L,35957L, 35958L,35959L,35960L,35961L,35962L,35963L,35964L,35965L,35966L,35967L, 35968L,35969L,35970L,35971L,35972L,35973L,35974L,35975L,35976L,35977L, 35978L,35979L,35980L,35981L,35982L,35983L,35984L,35985L,35986L,35987L, 35988L,35989L,35990L,35991L,35992L,35993L,35994L,35995L,35996L,35997L, 35998L,35999L,36000L,36001L,36002L,36003L,36004L,36005L,36006L,36007L, 36008L,36009L,36010L,36011L,36012L,36013L,36014L,36015L,36016L,36017L, 36018L,36019L,36020L,36021L,36022L,36023L,36024L,36025L,36026L,36027L, 36028L,36029L,36030L,36031L,36032L,36033L,36034L,36035L,36036L,36037L, 36038L,36039L,36040L,36041L,36042L,36043L,36044L,36045L,36046L,36047L, 36048L,36049L,36050L,36051L,36052L,36053L,36054L,36055L,36056L,36057L, 36058L,36059L,36060L,36061L,36062L,36063L,36064L,36065L,36066L,36067L, 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36208L,36209L,36210L,36211L,36212L,36213L,36214L,36215L,36216L,36217L, 36218L,36219L,36220L,36221L,36222L,36223L,36224L,36225L,36226L,36227L, 36228L,36229L,36230L,36231L,36232L,36233L,36234L,36235L,36236L,36237L, 36238L,36239L,36240L,36241L,36242L,36243L,36244L,36245L,36246L,36247L, 36248L,36249L,36250L,36251L,36252L,36253L,36254L,36255L,36256L,36257L, 36258L,36259L,36260L,36261L,36262L,36263L,36264L,36265L,36266L,36267L, 36268L,36269L,36270L,36271L,36272L,36273L,36274L,36275L,36276L,36277L, 36278L,36279L,36280L,36281L,36282L,36283L,36284L,36285L,36286L,36287L, 36288L,36289L,36290L,36291L,36292L,36293L,36294L,36295L,36296L,36297L, 36298L,36299L,36300L,36301L,36302L,36303L,36304L,36305L,36306L,36307L, 36308L,36309L,36310L,36311L,36312L,36313L,36314L,36315L,36316L,36317L, 36318L,36319L,36320L,36321L,36322L,36323L,36324L,36325L,36326L,36327L, 36328L,36329L,36330L,36331L,36332L,36333L,36334L,36335L,36336L,36337L, 36338L,36339L,36340L,36341L,36342L,36343L,36344L,36345L,36346L,36347L, 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37328L,37329L,37330L,37331L,37332L,37333L,37334L,37335L,37336L,37337L, 37338L,37339L,37340L,37341L,37342L,37343L,37344L,37345L,37346L,37347L, 37348L,37349L,37350L,37351L,37352L,37353L,37354L,37355L,37356L,37357L, 37358L,37359L,37360L,37361L,37362L,37363L,37364L,37365L,37366L,37367L, 37368L,37369L,37370L,37371L,37372L,37373L,37374L,37375L,37376L,37377L, 37378L,37379L,37380L,37381L,37382L,37383L,37384L,37385L,37386L,37387L, 37388L,37389L,37390L,37391L,37392L,37393L,37394L,37395L,37396L,37397L, 37398L,37399L,37400L,37401L,37402L,37403L,37404L,37405L,37406L,37407L, 37408L,37409L,37410L,37411L,37412L,37413L,37414L,37415L,37416L,37417L, 37418L,37419L,37420L,37421L,37422L,37423L,37424L,37425L,37426L,37427L, 37428L,37429L,37430L,37431L,37432L,37433L,37434L,37435L,37436L,37437L, 37438L,37439L,37440L,37441L,37442L,37443L,37444L,37445L,37446L,37447L, 37448L,37449L,37450L,37451L,37452L,37453L,37454L,37455L,37456L,37457L, 37458L,37459L,37460L,37461L,37462L,37463L,37464L,37465L,37466L,37467L, 37468L,37469L,37470L,37471L,37472L,37473L,37474L,37475L,37476L,37477L, 37478L,37479L,37480L,37481L,37482L,37483L,37484L,37485L,37486L,37487L, 37488L,37489L,37490L,37491L,37492L,37493L,37494L,37495L,37496L,37497L, 37498L,37499L,37500L,37501L,37502L,37503L,37504L,37505L,37506L,37507L, 37508L,37509L,37510L,37511L,37512L,37513L,37514L,37515L,37516L,37517L, 37518L,37519L,37520L,37521L,37522L,37523L,37524L,37525L,37526L,37527L, 37528L,37529L,37530L,37531L,37532L,37533L,37534L,37535L,37536L,37537L, 37538L,37539L,37540L,37541L,37542L,37543L,37544L,37545L,37546L,37547L, 37548L,37549L,37550L,37551L,37552L,37553L,37554L,37555L,37556L,37557L, 37558L,37559L,37560L,37561L,37562L,37563L,37564L,37565L,37566L,37567L, 37568L,37569L,37570L,37571L,37572L,37573L,37574L,37575L,37576L,37577L, 37578L,37579L,37580L,37581L,37582L,37583L,37584L,37585L,37586L,37587L, 37588L,37589L,37590L,37591L,37592L,37593L,37594L,37595L,37596L,37597L, 37598L,37599L,37600L,37601L,37602L,37603L,37604L,37605L,37606L,37607L, 37608L,37609L,37610L,37611L,37612L,37613L,37614L,37615L,37616L,37617L, 37618L,37619L,37620L,37621L,37622L,37623L,37624L,37625L,37626L,37627L, 37628L,37629L,37630L,37631L,37632L,37633L,37634L,37635L,37636L,37637L, 37638L,37639L,37640L,37641L,37642L,37643L,37644L,37645L,37646L,37647L, 37648L,37649L,37650L,37651L,37652L,37653L,37654L,37655L,37656L,37657L, 37658L,37659L,37660L,37661L,37662L,37663L,37664L,37665L,37666L,37667L, 37668L,37669L,37670L,37671L,37672L,37673L,37674L,37675L,37676L,37677L, 37678L,37679L,37680L,37681L,37682L,37683L,37684L,37685L,37686L,37687L, 37688L,37689L,37690L,37691L,37692L,37693L,37694L,37695L,37696L,37697L, 37698L,37699L,37700L,37701L,37702L,37703L,37704L,37705L,37706L,37707L, 37708L,37709L,37710L,37711L,37712L,37713L,37714L,37715L,37716L,37717L, 37718L,37719L,37720L,37721L,37722L,37723L,37724L,37725L,37726L,37727L, 37728L,37729L,37730L,37731L,37732L,37733L,37734L,37735L,37736L,37737L, 37738L,37739L,37740L,37741L,37742L,37743L,37744L,37745L,37746L,37747L, 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37888L,37889L,37890L,37891L,37892L,37893L,37894L,37895L,37896L,37897L, 37898L,37899L,37900L,37901L,37902L,37903L,37904L,37905L,37906L,37907L, 37908L,37909L,37910L,37911L,37912L,37913L,37914L,37915L,37916L,37917L, 37918L,37919L,37920L,37921L,37922L,37923L,37924L,37925L,37926L,37927L, 37928L,37929L,37930L,37931L,37932L,37933L,37934L,37935L,37936L,37937L, 37938L,37939L,37940L,37941L,37942L,37943L,37944L,37945L,37946L,37947L, 37948L,37949L,37950L,37951L,37952L,37953L,37954L,37955L,37956L,37957L, 37958L,37959L,37960L,37961L,37962L,37963L,37964L,37965L,37966L,37967L, 37968L,37969L,37970L,37971L,37972L,37973L,37974L,37975L,37976L,37977L, 37978L,37979L,37980L,37981L,37982L,37983L,37984L,37985L,37986L,37987L, 37988L,37989L,37990L,37991L,37992L,37993L,37994L,37995L,37996L,37997L, 37998L,37999L,38000L,38001L,38002L,38003L,38004L,38005L,38006L,38007L, 38008L,38009L,38010L,38011L,38012L,38013L,38014L,38015L,38016L,38017L, 38018L,38019L,38020L,38021L,38022L,38023L,38024L,38025L,38026L,38027L, 38028L,38029L,38030L,38031L,38032L,38033L,38034L,38035L,38036L,38037L, 38038L,38039L,38040L,38041L,38042L,38043L,38044L,38045L,38046L,38047L, 38048L,38049L,38050L,38051L,38052L,38053L,38054L,38055L,38056L,38057L, 38058L,38059L,38060L,38061L,38062L,38063L,38064L,38065L,38066L,38067L, 38068L,38069L,38070L,38071L,38072L,38073L,38074L,38075L,38076L,38077L, 38078L,38079L,38080L,38081L,38082L,38083L,38084L,38085L,38086L,38087L, 38088L,38089L,38090L,38091L,38092L,38093L,38094L,38095L,38096L,38097L, 38098L,38099L,38100L,38101L,38102L,38103L,38104L,38105L,38106L,38107L, 38108L,38109L,38110L,38111L,38112L,38113L,38114L,38115L,38116L,38117L, 38118L,38119L,38120L,38121L,38122L,38123L,38124L,38125L,38126L,38127L, 38128L,38129L,38130L,38131L,38132L,38133L,38134L,38135L,38136L,38137L, 38138L,38139L,38140L,38141L,38142L,38143L,38144L,38145L,38146L,38147L, 38148L,38149L,38150L,38151L,38152L,38153L,38154L,38155L,38156L,38157L, 38158L,38159L,38160L,38161L,38162L,38163L,38164L,38165L,38166L,38167L, 38168L,38169L,38170L,38171L,38172L,38173L,38174L,38175L,38176L,38177L, 38178L,38179L,38180L,38181L,38182L,38183L,38184L,38185L,38186L,38187L, 38188L,38189L,38190L,38191L,38192L,38193L,38194L,38195L,38196L,38197L, 38198L,38199L,38200L,38201L,38202L,38203L,38204L,38205L,38206L,38207L, 38208L,38209L,38210L,38211L,38212L,38213L,38214L,38215L,38216L,38217L, 38218L,38219L,38220L,38221L,38222L,38223L,38224L,38225L,38226L,38227L, 38228L,38229L,38230L,38231L,38232L,38233L,38234L,38235L,38236L,38237L, 38238L,38239L,38240L,38241L,38242L,38243L,38244L,38245L,38246L,38247L, 38248L,38249L,38250L,38251L,38252L,38253L,38254L,38255L,38256L,38257L, 38258L,38259L,38260L,38261L,38262L,38263L,38264L,38265L,38266L,38267L, 38268L,38269L,38270L,38271L,38272L,38273L,38274L,38275L,38276L,38277L, 38278L,38279L,38280L,38281L,38282L,38283L,38284L,38285L,38286L,38287L, 38288L,38289L,38290L,38291L,38292L,38293L,38294L,38295L,38296L,38297L, 38298L,38299L,38300L,38301L,38302L,38303L,38304L,38305L,38306L,38307L, 38308L,38309L,38310L,38311L,38312L,38313L,38314L,38315L,38316L,38317L, 38318L,38319L,38320L,38321L,38322L,38323L,38324L,38325L,38326L,38327L, 38328L,38329L,38330L,38331L,38332L,38333L,38334L,38335L,38336L,38337L, 38338L,38339L,38340L,38341L,38342L,38343L,38344L,38345L,38346L,38347L, 38348L,38349L,38350L,38351L,38352L,38353L,38354L,38355L,38356L,38357L, 38358L,38359L,38360L,38361L,38362L,38363L,38364L,38365L,38366L,38367L, 38368L,38369L,38370L,38371L,38372L,38373L,38374L,38375L,38376L,38377L, 38378L,38379L,38380L,38381L,38382L,38383L,38384L,38385L,38386L,38387L, 38388L,38389L,38390L,38391L,38392L,38393L,38394L,38395L,38396L,38397L, 38398L,38399L,38400L,38401L,38402L,38403L,38404L,38405L,38406L,38407L, 38408L,38409L,38410L,38411L,38412L,38413L,38414L,38415L,38416L,38417L, 38418L,38419L,38420L,38421L,38422L,38423L,38424L,38425L,38426L,38427L, 38428L,38429L,38430L,38431L,38432L,38433L,38434L,38435L,38436L,38437L, 38438L,38439L,38440L,38441L,38442L,38443L,38444L,38445L,38446L,38447L, 38448L,38449L,38450L,38451L,38452L,38453L,38454L,38455L,38456L,38457L, 38458L,38459L,38460L,38461L,38462L,38463L,38464L,38465L,38466L,38467L, 38468L,38469L,38470L,38471L,38472L,38473L,38474L,38475L,38476L,38477L, 38478L,38479L,38480L,38481L,38482L,38483L,38484L,38485L,38486L,38487L, 38488L,38489L,38490L,38491L,38492L,38493L,38494L,38495L,38496L,38497L, 38498L,38499L,38500L,38501L,38502L,38503L,38504L,38505L,38506L,38507L, 38508L,38509L,38510L,38511L,38512L,38513L,38514L,38515L,38516L,38517L, 38518L,38519L,38520L,38521L,38522L,38523L,38524L,38525L,38526L,38527L, 38528L,38529L,38530L,38531L,38532L,38533L,38534L,38535L,38536L,38537L, 38538L,38539L,38540L,38541L,38542L,38543L,38544L,38545L,38546L,38547L, 38548L,38549L,38550L,38551L,38552L,38553L,38554L,38555L,38556L,38557L, 38558L,38559L,38560L,38561L,38562L,38563L,38564L,38565L,38566L,38567L, 38568L,38569L,38570L,38571L,38572L,38573L,38574L,38575L,38576L,38577L, 38578L,38579L,38580L,38581L,38582L,38583L,38584L,38585L,38586L,38587L, 38588L,38589L,38590L,38591L,38592L,38593L,38594L,38595L,38596L,38597L, 38598L,38599L,38600L,38601L,38602L,38603L,38604L,38605L,38606L,38607L, 38608L,38609L,38610L,38611L,38612L,38613L,38614L,38615L,38616L,38617L, 38618L,38619L,38620L,38621L,38622L,38623L,38624L,38625L,38626L,38627L, 38628L,38629L,38630L,38631L,38632L,38633L,38634L,38635L,38636L,38637L, 38638L,38639L,38640L,38641L,38642L,38643L,38644L,38645L,38646L,38647L, 38648L,38649L,38650L,38651L,38652L,38653L,38654L,38655L,38656L,38657L, 38658L,38659L,38660L,38661L,38662L,38663L,38664L,38665L,38666L,38667L, 38668L,38669L,38670L,38671L,38672L,38673L,38674L,38675L,38676L,38677L, 38678L,38679L,38680L,38681L,38682L,38683L,38684L,38685L,38686L,38687L, 38688L,38689L,38690L,38691L,38692L,38693L,38694L,38695L,38696L,38697L, 38698L,38699L,38700L,38701L,38702L,38703L,38704L,38705L,38706L,38707L, 38708L,38709L,38710L,38711L,38712L,38713L,38714L,38715L,38716L,38717L, 38718L,38719L,38720L,38721L,38722L,38723L,38724L,38725L,38726L,38727L, 38728L,38729L,38730L,38731L,38732L,38733L,38734L,38735L,38736L,38737L, 38738L,38739L,38740L,38741L,38742L,38743L,38744L,38745L,38746L,38747L, 38748L,38749L,38750L,38751L,38752L,38753L,38754L,38755L,38756L,38757L, 38758L,38759L,38760L,38761L,38762L,38763L,38764L,38765L,38766L,38767L, 38768L,38769L,38770L,38771L,38772L,38773L,38774L,38775L,38776L,38777L, 38778L,38779L,38780L,38781L,38782L,38783L,38784L,38785L,38786L,38787L, 38788L,38789L,38790L,38791L,38792L,38793L,38794L,38795L,38796L,38797L, 38798L,38799L,38800L,38801L,38802L,38803L,38804L,38805L,38806L,38807L, 38808L,38809L,38810L,38811L,38812L,38813L,38814L,38815L,38816L,38817L, 38818L,38819L,38820L,38821L,38822L,38823L,38824L,38825L,38826L,38827L, 38828L,38829L,38830L,38831L,38832L,38833L,38834L,38835L,38836L,38837L, 38838L,38839L,38840L,38841L,38842L,38843L,38844L,38845L,38846L,38847L, 38848L,38849L,38850L,38851L,38852L,38853L,38854L,38855L,38856L,38857L, 38858L,38859L,38860L,38861L,38862L,38863L,38864L,38865L,38866L,38867L, 38868L,38869L,38870L,38871L,38872L,38873L,38874L,38875L,38876L,38877L, 38878L,38879L,38880L,38881L,38882L,38883L,38884L,38885L,38886L,38887L, 38888L,38889L,38890L,38891L,38892L,38893L,38894L,38895L,38896L,38897L, 38898L,38899L,38900L,38901L,38902L,38903L,38904L,38905L,38906L,38907L, 38908L,38909L,38910L,38911L,38912L,38913L,38914L,38915L,38916L,38917L, 38918L,38919L,38920L,38921L,38922L,38923L,38924L,38925L,38926L,38927L, 38928L,38929L,38930L,38931L,38932L,38933L,38934L,38935L,38936L,38937L, 38938L,38939L,38940L,38941L,38942L,38943L,38944L,38945L,38946L,38947L, 38948L,38949L,38950L,38951L,38952L,38953L,38954L,38955L,38956L,38957L, 38958L,38959L,38960L,38961L,38962L,38963L,38964L,38965L,38966L,38967L, 38968L,38969L,38970L,38971L,38972L,38973L,38974L,38975L,38976L,38977L, 38978L,38979L,38980L,38981L,38982L,38983L,38984L,38985L,38986L,38987L, 38988L,38989L,38990L,38991L,38992L,38993L,38994L,38995L,38996L,38997L, 38998L,38999L,39000L,39001L,39002L,39003L,39004L,39005L,39006L,39007L, 39008L,39009L,39010L,39011L,39012L,39013L,39014L,39015L,39016L,39017L, 39018L,39019L,39020L,39021L,39022L,39023L,39024L,39025L,39026L,39027L, 39028L,39029L,39030L,39031L,39032L,39033L,39034L,39035L,39036L,39037L, 39038L,39039L,39040L,39041L,39042L,39043L,39044L,39045L,39046L,39047L, 39048L,39049L,39050L,39051L,39052L,39053L,39054L,39055L,39056L,39057L, 39058L,39059L,39060L,39061L,39062L,39063L,39064L,39065L,39066L,39067L, 39068L,39069L,39070L,39071L,39072L,39073L,39074L,39075L,39076L,39077L, 39078L,39079L,39080L,39081L,39082L,39083L,39084L,39085L,39086L,39087L, 39088L,39089L,39090L,39091L,39092L,39093L,39094L,39095L,39096L,39097L, 39098L,39099L,39100L,39101L,39102L,39103L,39104L,39105L,39106L,39107L, 39108L,39109L,39110L,39111L,39112L,39113L,39114L,39115L,39116L,39117L, 39118L,39119L,39120L,39121L,39122L,39123L,39124L,39125L,39126L,39127L, 39128L,39129L,39130L,39131L,39132L,39133L,39134L,39135L,39136L,39137L, 39138L,39139L,39140L,39141L,39142L,39143L,39144L,39145L,39146L,39147L, 39148L,39149L,39150L,39151L,39152L,39153L,39154L,39155L,39156L,39157L, 39158L,39159L,39160L,39161L,39162L,39163L,39164L,39165L,39166L,39167L, 39168L,39169L,39170L,39171L,39172L,39173L,39174L,39175L,39176L,39177L, 39178L,39179L,39180L,39181L,39182L,39183L,39184L,39185L,39186L,39187L, 39188L,39189L,39190L,39191L,39192L,39193L,39194L,39195L,39196L,39197L, 39198L,39199L,39200L,39201L,39202L,39203L,39204L,39205L,39206L,39207L, 39208L,39209L,39210L,39211L,39212L,39213L,39214L,39215L,39216L,39217L, 39218L,39219L,39220L,39221L,39222L,39223L,39224L,39225L,39226L,39227L, 39228L,39229L,39230L,39231L,39232L,39233L,39234L,39235L,39236L,39237L, 39238L,39239L,39240L,39241L,39242L,39243L,39244L,39245L,39246L,39247L, 39248L,39249L,39250L,39251L,39252L,39253L,39254L,39255L,39256L,39257L, 39258L,39259L,39260L,39261L,39262L,39263L,39264L,39265L,39266L,39267L, 39268L,39269L,39270L,39271L,39272L,39273L,39274L,39275L,39276L,39277L, 39278L,39279L,39280L,39281L,39282L,39283L,39284L,39285L,39286L,39287L, 39288L,39289L,39290L,39291L,39292L,39293L,39294L,39295L,39296L,39297L, 39298L,39299L,39300L,39301L,39302L,39303L,39304L,39305L,39306L,39307L, 39308L,39309L,39310L,39311L,39312L,39313L,39314L,39315L,39316L,39317L, 39318L,39319L,39320L,39321L,39322L,39323L,39324L,39325L,39326L,39327L, 39328L,39329L,39330L,39331L,39332L,39333L,39334L,39335L,39336L,39337L, 39338L,39339L,39340L,39341L,39342L,39343L,39344L,39345L,39346L,39347L, 39348L,39349L,39350L,39351L,39352L,39353L,39354L,39355L,39356L,39357L, 39358L,39359L,39360L,39361L,39362L,39363L,39364L,39365L,39366L,39367L, 39368L,39369L,39370L,39371L,39372L,39373L,39374L,39375L,39376L,39377L, 39378L,39379L,39380L,39381L,39382L,39383L,39384L,39385L,39386L,39387L, 39388L,39389L,39390L,39391L,39392L,39393L,39394L,39395L,39396L,39397L, 39398L,39399L,39400L,39401L,39402L,39403L,39404L,39405L,39406L,39407L, 39408L,39409L,39410L,39411L,39412L,39413L,39414L,39415L,39416L,39417L, 39418L,39419L,39420L,39421L,39422L,39423L,39424L,39425L,39426L,39427L, 39428L,39429L,39430L,39431L,39432L,39433L,39434L,39435L,39436L,39437L, 39438L,39439L,39440L,39441L,39442L,39443L,39444L,39445L,39446L,39447L, 39448L,39449L,39450L,39451L,39452L,39453L,39454L,39455L,39456L,39457L, 39458L,39459L,39460L,39461L,39462L,39463L,39464L,39465L,39466L,39467L, 39468L,39469L,39470L,39471L,39472L,39473L,39474L,39475L,39476L,39477L, 39478L,39479L,39480L,39481L,39482L,39483L,39484L,39485L,39486L,39487L, 39488L,39489L,39490L,39491L,39492L,39493L,39494L,39495L,39496L,39497L, 39498L,39499L,39500L,39501L,39502L,39503L,39504L,39505L,39506L,39507L, 39508L,39509L,39510L,39511L,39512L,39513L,39514L,39515L,39516L,39517L, 39518L,39519L,39520L,39521L,39522L,39523L,39524L,39525L,39526L,39527L, 39528L,39529L,39530L,39531L,39532L,39533L,39534L,39535L,39536L,39537L, 39538L,39539L,39540L,39541L,39542L,39543L,39544L,39545L,39546L,39547L, 39548L,39549L,39550L,39551L,39552L,39553L,39554L,39555L,39556L,39557L, 39558L,39559L,39560L,39561L,39562L,39563L,39564L,39565L,39566L,39567L, 39568L,39569L,39570L,39571L,39572L,39573L,39574L,39575L,39576L,39577L, 39578L,39579L,39580L,39581L,39582L,39583L,39584L,39585L,39586L,39587L, 39588L,39589L,39590L,39591L,39592L,39593L,39594L,39595L,39596L,39597L, 39598L,39599L,39600L,39601L,39602L,39603L,39604L,39605L,39606L,39607L, 39608L,39609L,39610L,39611L,39612L,39613L,39614L,39615L,39616L,39617L, 39618L,39619L,39620L,39621L,39622L,39623L,39624L,39625L,39626L,39627L, 39628L,39629L,39630L,39631L,39632L,39633L,39634L,39635L,39636L,39637L, 39638L,39639L,39640L,39641L,39642L,39643L,39644L,39645L,39646L,39647L, 39648L,39649L,39650L,39651L,39652L,39653L,39654L,39655L,39656L,39657L, 39658L,39659L,39660L,39661L,39662L,39663L,39664L,39665L,39666L,39667L, 39668L,39669L,39670L,39671L,39672L,39673L,39674L,39675L,39676L,39677L, 39678L,39679L,39680L,39681L,39682L,39683L,39684L,39685L,39686L,39687L, 39688L,39689L,39690L,39691L,39692L,39693L,39694L,39695L,39696L,39697L, 39698L,39699L,39700L,39701L,39702L,39703L,39704L,39705L,39706L,39707L, 39708L,39709L,39710L,39711L,39712L,39713L,39714L,39715L,39716L,39717L, 39718L,39719L,39720L,39721L,39722L,39723L,39724L,39725L,39726L,39727L, 39728L,39729L,39730L,39731L,39732L,39733L,39734L,39735L,39736L,39737L, 39738L,39739L,39740L,39741L,39742L,39743L,39744L,39745L,39746L,39747L, 39748L,39749L,39750L,39751L,39752L,39753L,39754L,39755L,39756L,39757L, 39758L,39759L,39760L,39761L,39762L,39763L,39764L,39765L,39766L,39767L, 39768L,39769L,39770L,39771L,39772L,39773L,39774L,39775L,39776L,39777L, 39778L,39779L,39780L,39781L,39782L,39783L,39784L,39785L,39786L,39787L, 39788L,39789L,39790L,39791L,39792L,39793L,39794L,39795L,39796L,39797L, 39798L,39799L,39800L,39801L,39802L,39803L,39804L,39805L,39806L,39807L, 39808L,39809L,39810L,39811L,39812L,39813L,39814L,39815L,39816L,39817L, 39818L,39819L,39820L,39821L,39822L,39823L,39824L,39825L,39826L,39827L, 39828L,39829L,39830L,39831L,39832L,39833L,39834L,39835L,39836L,39837L, 39838L,39839L,39840L,39841L,39842L,39843L,39844L,39845L,39846L,39847L, 39848L,39849L,39850L,39851L,39852L,39853L,39854L,39855L,39856L,39857L, 39858L,39859L,39860L,39861L,39862L,39863L,39864L,39865L,39866L,39867L, 39868L,39869L,39870L,39871L,39872L,39873L,39874L,39875L,39876L,39877L, 39878L,39879L,39880L,39881L,39882L,39883L,39884L,39885L,39886L,39887L, 39888L,39889L,39890L,39891L,39892L,39893L,39894L,39895L,39896L,39897L, 39898L,39899L,39900L,39901L,39902L,39903L,39904L,39905L,39906L,39907L, 39908L,39909L,39910L,39911L,39912L,39913L,39914L,39915L,39916L,39917L, 39918L,39919L,39920L,39921L,39922L,39923L,39924L,39925L,39926L,39927L, 39928L,39929L,39930L,39931L,39932L,39933L,39934L,39935L,39936L,39937L, 39938L,39939L,39940L,39941L,39942L,39943L,39944L,39945L,39946L,39947L, 39948L,39949L,39950L,39951L,39952L,39953L,39954L,39955L,39956L,39957L, 39958L,39959L,39960L,39961L,39962L,39963L,39964L,39965L,39966L,39967L, 39968L,39969L,39970L,39971L,39972L,39973L,39974L,39975L,39976L,39977L, 39978L,39979L,39980L,39981L,39982L,39983L,39984L,39985L,39986L,39987L, 39988L,39989L,39990L,39991L,39992L,39993L,39994L,39995L,39996L,39997L, 39998L,39999L,40000L,40001L,40002L,40003L,40004L,40005L,40006L,40007L, 40008L,40009L,40010L,40011L,40012L,40013L,40014L,40015L,40016L,40017L, 40018L,40019L,40020L,40021L,40022L,40023L,40024L,40025L,40026L,40027L, 40028L,40029L,40030L,40031L,40032L,40033L,40034L,40035L,40036L,40037L, 40038L,40039L,40040L,40041L,40042L,40043L,40044L,40045L,40046L,40047L, 40048L,40049L,40050L,40051L,40052L,40053L,40054L,40055L,40056L,40057L, 40058L,40059L,40060L,40061L,40062L,40063L,40064L,40065L,40066L,40067L, 40068L,40069L,40070L,40071L,40072L,40073L,40074L,40075L,40076L,40077L, 40078L,40079L,40080L,40081L,40082L,40083L,40084L,40085L,40086L,40087L, 40088L,40089L,40090L,40091L,40092L,40093L,40094L,40095L,40096L,40097L, 40098L,40099L,40100L,40101L,40102L,40103L,40104L,40105L,40106L,40107L, 40108L,40109L,40110L,40111L,40112L,40113L,40114L,40115L,40116L,40117L, 40118L,40119L,40120L,40121L,40122L,40123L,40124L,40125L,40126L,40127L, 40128L,40129L,40130L,40131L,40132L,40133L,40134L,40135L,40136L,40137L, 40138L,40139L,40140L,40141L,40142L,40143L,40144L,40145L,40146L,40147L, 40148L,40149L,40150L,40151L,40152L,40153L,40154L,40155L,40156L,40157L, 40158L,40159L,40160L,40161L,40162L,40163L,40164L,40165L,40166L,40167L, 40168L,40169L,40170L,40171L,40172L,40173L,40174L,40175L,40176L,40177L, 40178L,40179L,40180L,40181L,40182L,40183L,40184L,40185L,40186L,40187L, 40188L,40189L,40190L,40191L,40192L,40193L,40194L,40195L,40196L,40197L, 40198L,40199L,40200L,40201L,40202L,40203L,40204L,40205L,40206L,40207L, 40208L,40209L,40210L,40211L,40212L,40213L,40214L,40215L,40216L,40217L, 40218L,40219L,40220L,40221L,40222L,40223L,40224L,40225L,40226L,40227L, 40228L,40229L,40230L,40231L,40232L,40233L,40234L,40235L,40236L,40237L, 40238L,40239L,40240L,40241L,40242L,40243L,40244L,40245L,40246L,40247L, 40248L,40249L,40250L,40251L,40252L,40253L,40254L,40255L,40256L,40257L, 40258L,40259L,40260L,40261L,40262L,40263L,40264L,40265L,40266L,40267L, 40268L,40269L,40270L,40271L,40272L,40273L,40274L,40275L,40276L,40277L, 40278L,40279L,40280L,40281L,40282L,40283L,40284L,40285L,40286L,40287L, 40288L,40289L,40290L,40291L,40292L,40293L,40294L,40295L,40296L,40297L, 40298L,40299L,40300L,40301L,40302L,40303L,40304L,40305L,40306L,40307L, 40308L,40309L,40310L,40311L,40312L,40313L,40314L,40315L,40316L,40317L, 40318L,40319L,40320L,40321L,40322L,40323L,40324L,40325L,40326L,40327L, 40328L,40329L,40330L,40331L,40332L,40333L,40334L,40335L,40336L,40337L, 40338L,40339L,40340L,40341L,40342L,40343L,40344L,40345L,40346L,40347L, 40348L,40349L,40350L,40351L,40352L,40353L,40354L,40355L,40356L,40357L, 40358L,40359L,40360L,40361L,40362L,40363L,40364L,40365L,40366L,40367L, 40368L,40369L,40370L,40371L,40372L,40373L,40374L,40375L,40376L,40377L, 40378L,40379L,40380L,40381L,40382L,40383L,40384L,40385L,40386L,40387L, 40388L,40389L,40390L,40391L,40392L,40393L,40394L,40395L,40396L,40397L, 40398L,40399L,40400L,40401L,40402L,40403L,40404L,40405L,40406L,40407L, 40408L,40409L,40410L,40411L,40412L,40413L,40414L,40415L,40416L,40417L, 40418L,40419L,40420L,40421L,40422L,40423L,40424L,40425L,40426L,40427L, 40428L,40429L,40430L,40431L,40432L,40433L,40434L,40435L,40436L,40437L, 40438L,40439L,40440L,40441L,40442L,40443L,40444L,40445L,40446L,40447L, 40448L,40449L,40450L,40451L,40452L,40453L,40454L,40455L,40456L,40457L, 40458L,40459L,40460L,40461L,40462L,40463L,40464L,40465L,40466L,40467L, 40468L,40469L,40470L,40471L,40472L,40473L,40474L,40475L,40476L,40477L, 40478L,40479L,40480L,40481L,40482L,40483L,40484L,40485L,40486L,40487L, 40488L,40489L,40490L,40491L,40492L,40493L,40494L,40495L,40496L,40497L, 40498L,40499L,40500L,40501L,40502L,40503L,40504L,40505L,40506L,40507L, 40508L,40509L,40510L,40511L,40512L,40513L,40514L,40515L,40516L,40517L, 40518L,40519L,40520L,40521L,40522L,40523L,40524L,40525L,40526L,40527L, 40528L,40529L,40530L,40531L,40532L,40533L,40534L,40535L,40536L,40537L, 40538L,40539L,40540L,40541L,40542L,40543L,40544L,40545L,40546L,40547L, 40548L,40549L,40550L,40551L,40552L,40553L,40554L,40555L,40556L,40557L, 40558L,40559L,40560L,40561L,40562L,40563L,40564L,40565L,40566L,40567L, 40568L,40569L,40570L,40571L,40572L,40573L,40574L,40575L,40576L,40577L, 40578L,40579L,40580L,40581L,40582L,40583L,40584L,40585L,40586L,40587L, 40588L,40589L,40590L,40591L,40592L,40593L,40594L,40595L,40596L,40597L, 40598L,40599L,40600L,40601L,40602L,40603L,40604L,40605L,40606L,40607L, 40608L,40609L,40610L,40611L,40612L,40613L,40614L,40615L,40616L,40617L, 40618L,40619L,40620L,40621L,40622L,40623L,40624L,40625L,40626L,40627L, 40628L,40629L,40630L,40631L,40632L,40633L,40634L,40635L,40636L,40637L, 40638L,40639L,40640L,40641L,40642L,40643L,40644L,40645L,40646L,40647L, 40648L,40649L,40650L,40651L,40652L,40653L,40654L,40655L,40656L,40657L, 40658L,40659L,40660L,40661L,40662L,40663L,40664L,40665L,40666L,40667L, 40668L,40669L,40670L,40671L,40672L,40673L,40674L,40675L,40676L,40677L, 40678L,40679L,40680L,40681L,40682L,40683L,40684L,40685L,40686L,40687L, 40688L,40689L,40690L,40691L,40692L,40693L,40694L,40695L,40696L,40697L, 40698L,40699L,40700L,40701L,40702L,40703L,40704L,40705L,40706L,40707L, 40708L,40709L,40710L,40711L,40712L,40713L,40714L,40715L,40716L,40717L, 40718L,40719L,40720L,40721L,40722L,40723L,40724L,40725L,40726L,40727L, 40728L,40729L,40730L,40731L,40732L,40733L,40734L,40735L,40736L,40737L, 40738L,40739L,40740L,40741L,40742L,40743L,40744L,40745L,40746L,40747L, 40748L,40749L,40750L,40751L,40752L,40753L,40754L,40755L,40756L,40757L, 40758L,40759L,40760L,40761L,40762L,40763L,40764L,40765L,40766L,40767L, 40768L,40769L,40770L,40771L,40772L,40773L,40774L,40775L,40776L,40777L, 40778L,40779L,40780L,40781L,40782L,40783L,40784L,40785L,40786L,40787L, 40788L,40789L,40790L,40791L,40792L,40793L,40794L,40795L,40796L,40797L, 40798L,40799L,40800L,40801L,40802L,40803L,40804L,40805L,40806L,40807L, 40808L,40809L,40810L,40811L,40812L,40813L,40814L,40815L,40816L,40817L, 40818L,40819L,40820L,40821L,40822L,40823L,40824L,40825L,40826L,40827L, 40828L,40829L,40830L,40831L,40832L,40833L,40834L,40835L,40836L,40837L, 40838L,40839L,40840L,40841L,40842L,40843L,40844L,40845L,40846L,40847L, 40848L,40849L,40850L,40851L,40852L,40853L,40854L,40855L,40856L,40857L, 40858L,40859L,40860L,40861L,40862L,40863L,40864L,40865L,40866L,40867L, 40868L,40869L,40870L,40871L,40872L,40873L,40874L,40875L,40876L,40877L, 40878L,40879L,40880L,40881L,40882L,40883L,40884L,40885L,40886L,40887L, 40888L,40889L,40890L,40891L,40892L,40893L,40894L,40895L,40896L,40897L, 40898L,40899L,40900L,40901L,40902L,40903L,40904L,40905L,40906L,40907L, 40908L,40909L,40910L,40911L,40912L,40913L,40914L,40915L,40916L,40917L, 40918L,40919L,40920L,40921L,40922L,40923L,40924L,40925L,40926L,40927L, 40928L,40929L,40930L,40931L,40932L,40933L,40934L,40935L,40936L,40937L, 40938L,40939L,40940L,40941L,40942L,40943L,40944L,40945L,40946L,40947L, 40948L,40949L,40950L,40951L,40952L,40953L,40954L,40955L,40956L,40957L, 40958L,40959L,40960L,40961L,40962L,40963L,40964L,40965L,40966L,40967L, 40968L,40969L,40970L,40971L,40972L,40973L,40974L,40975L,40976L,40977L, 40978L,40979L,40980L,40981L,40982L,40983L,40984L,40985L,40986L,40987L, 40988L,40989L,40990L,40991L,40992L,40993L,40994L,40995L,40996L,40997L, 40998L,40999L,41000L,41001L,41002L,41003L,41004L,41005L,41006L,41007L, 41008L,41009L,41010L,41011L,41012L,41013L,41014L,41015L,41016L,41017L, 41018L,41019L,41020L,41021L,41022L,41023L,41024L,41025L,41026L,41027L, 41028L,41029L,41030L,41031L,41032L,41033L,41034L,41035L,41036L,41037L, 41038L,41039L,41040L,41041L,41042L,41043L,41044L,41045L,41046L,41047L, 41048L,41049L,41050L,41051L,41052L,41053L,41054L,41055L,41056L,41057L, 41058L,41059L,41060L,41061L,41062L,41063L,41064L,41065L,41066L,41067L, 41068L,41069L,41070L,41071L,41072L,41073L,41074L,41075L,41076L,41077L, 41078L,41079L,41080L,41081L,41082L,41083L,41084L,41085L,41086L,41087L, 41088L,41089L,41090L,41091L,41092L,41093L,41094L,41095L,41096L,41097L, 41098L,41099L,41100L,41101L,41102L,41103L,41104L,41105L,41106L,41107L, 41108L,41109L,41110L,41111L,41112L,41113L,41114L,41115L,41116L,41117L, 41118L,41119L,41120L,41121L,41122L,41123L,41124L,41125L,41126L,41127L, 41128L,41129L,41130L,41131L,41132L,41133L,41134L,41135L,41136L,41137L, 41138L,41139L,41140L,41141L,41142L,41143L,41144L,41145L,41146L,41147L, 41148L,41149L,41150L,41151L,41152L,41153L,41154L,41155L,41156L,41157L, 41158L,41159L,41160L,41161L,41162L,41163L,41164L,41165L,41166L,41167L, 41168L,41169L,41170L,41171L,41172L,41173L,41174L,41175L,41176L,41177L, 41178L,41179L,41180L,41181L,41182L,41183L,41184L,41185L,41186L,41187L, 41188L,41189L,41190L,41191L,41192L,41193L,41194L,41195L,41196L,41197L, 41198L,41199L,41200L,41201L,41202L,41203L,41204L,41205L,41206L,41207L, 41208L,41209L,41210L,41211L,41212L,41213L,41214L,41215L,41216L,41217L, 41218L,41219L,41220L,41221L,41222L,41223L,41224L,41225L,41226L,41227L, 41228L,41229L,41230L,41231L,41232L,41233L,41234L,41235L,41236L,41237L, 41238L,41239L,41240L,41241L,41242L,41243L,41244L,41245L,41246L,41247L, 41248L,41249L,41250L,41251L,41252L,41253L,41254L,41255L,41256L,41257L, 41258L,41259L,41260L,41261L,41262L,41263L,41264L,41265L,41266L,41267L, 41268L,41269L,41270L,41271L,41272L,41273L,41274L,41275L,41276L,41277L, 41278L,41279L,41280L,41281L,41282L,41283L,41284L,41285L,41286L,41287L, 41288L,41289L,41290L,41291L,41292L,41293L,41294L,41295L,41296L,41297L, 41298L,41299L,41300L,41301L,41302L,41303L,41304L,41305L,41306L,41307L, 41308L,41309L,41310L,41311L,41312L,41313L,41314L,41315L,41316L,41317L, 41318L,41319L,41320L,41321L,41322L,41323L,41324L,41325L,41326L,41327L, 41328L,41329L,41330L,41331L,41332L,41333L,41334L,41335L,41336L,41337L, 41338L,41339L,41340L,41341L,41342L,41343L,41344L,41345L,41346L,41347L, 41348L,41349L,41350L,41351L,41352L,41353L,41354L,41355L,41356L,41357L, 41358L,41359L,41360L,41361L,41362L,41363L,41364L,41365L,41366L,41367L, 41368L,41369L,41370L,41371L,41372L,41373L,41374L,41375L,41376L,41377L, 41378L,41379L,41380L,41381L,41382L,41383L,41384L,41385L,41386L,41387L, 41388L,41389L,41390L,41391L,41392L,41393L,41394L,41395L,41396L,41397L, 41398L,41399L,41400L,41401L,41402L,41403L,41404L,41405L,41406L,41407L, 41408L,41409L,41410L,41411L,41412L,41413L,41414L,41415L,41416L,41417L, 41418L,41419L,41420L,41421L,41422L,41423L,41424L,41425L,41426L,41427L, 41428L,41429L,41430L,41431L,41432L,41433L,41434L,41435L,41436L,41437L, 41438L,41439L,41440L,41441L,41442L,41443L,41444L,41445L,41446L,41447L, 41448L,41449L,41450L,41451L,41452L,41453L,41454L,41455L,41456L,41457L, 41458L,41459L,41460L,41461L,41462L,41463L,41464L,41465L,41466L,41467L, 41468L,41469L,41470L,41471L,41472L,41473L,41474L,41475L,41476L,41477L, 41478L,41479L,41480L,41481L,41482L,41483L,41484L,41485L,41486L,41487L, 41488L,41489L,41490L,41491L,41492L,41493L,41494L,41495L,41496L,41497L, 41498L,41499L,41500L,41501L,41502L,41503L,41504L,41505L,41506L,41507L, 41508L,41509L,41510L,41511L,41512L,41513L,41514L,41515L,41516L,41517L, 41518L,41519L,41520L,41521L,41522L,41523L,41524L,41525L,41526L,41527L, 41528L,41529L,41530L,41531L,41532L,41533L,41534L,41535L,41536L,41537L, 41538L,41539L,41540L,41541L,41542L,41543L,41544L,41545L,41546L,41547L, 41548L,41549L,41550L,41551L,41552L,41553L,41554L,41555L,41556L,41557L, 41558L,41559L,41560L,41561L,41562L,41563L,41564L,41565L,41566L,41567L, 41568L,41569L,41570L,41571L,41572L,41573L,41574L,41575L,41576L,41577L, 41578L,41579L,41580L,41581L,41582L,41583L,41584L,41585L,41586L,41587L, 41588L,41589L,41590L,41591L,41592L,41593L,41594L,41595L,41596L,41597L, 41598L,41599L,41600L,41601L,41602L,41603L,41604L,41605L,41606L,41607L, 41608L,41609L,41610L,41611L,41612L,41613L,41614L,41615L,41616L,41617L, 41618L,41619L,41620L,41621L,41622L,41623L,41624L,41625L,41626L,41627L, 41628L,41629L,41630L,41631L,41632L,41633L,41634L,41635L,41636L,41637L, 41638L,41639L,41640L,41641L,41642L,41643L,41644L,41645L,41646L,41647L, 41648L,41649L,41650L,41651L,41652L,41653L,41654L,41655L,41656L,41657L, 41658L,41659L,41660L,41661L,41662L,41663L,41664L,41665L,41666L,41667L, 41668L,41669L,41670L,41671L,41672L,41673L,41674L,41675L,41676L,41677L, 41678L,41679L,41680L,41681L,41682L,41683L,41684L,41685L,41686L,41687L, 41688L,41689L,41690L,41691L,41692L,41693L,41694L,41695L,41696L,41697L, 41698L,41699L,41700L,41701L,41702L,41703L,41704L,41705L,41706L,41707L, 41708L,41709L,41710L,41711L,41712L,41713L,41714L,41715L,41716L,41717L, 41718L,41719L,41720L,41721L,41722L,41723L,41724L,41725L,41726L,41727L, 41728L,41729L,41730L,41731L,41732L,41733L,41734L,41735L,41736L,41737L, 41738L,41739L,41740L,41741L,41742L,41743L,41744L,41745L,41746L,41747L, 41748L,41749L,41750L,41751L,41752L,41753L,41754L,41755L,41756L,41757L, 41758L,41759L,41760L,41761L,41762L,41763L,41764L,41765L,41766L,41767L, 41768L,41769L,41770L,41771L,41772L,41773L,41774L,41775L,41776L,41777L, 41778L,41779L,41780L,41781L,41782L,41783L,41784L,41785L,41786L,41787L, 41788L,41789L,41790L,41791L,41792L,41793L,41794L,41795L,41796L,41797L, 41798L,41799L,41800L,41801L,41802L,41803L,41804L,41805L,41806L,41807L, 41808L,41809L,41810L,41811L,41812L,41813L,41814L,41815L,41816L,41817L, 41818L,41819L,41820L,41821L,41822L,41823L,41824L,41825L,41826L,41827L, 41828L,41829L,41830L,41831L,41832L,41833L,41834L,41835L,41836L,41837L, 41838L,41839L,41840L,41841L,41842L,41843L,41844L,41845L,41846L,41847L, 41848L,41849L,41850L,41851L,41852L,41853L,41854L,41855L,41856L,41857L, 41858L,41859L,41860L,41861L,41862L,41863L,41864L,41865L,41866L,41867L, 41868L,41869L,41870L,41871L,41872L,41873L,41874L,41875L,41876L,41877L, 41878L,41879L,41880L,41881L,41882L,41883L,41884L,41885L,41886L,41887L, 41888L,41889L,41890L,41891L,41892L,41893L,41894L,41895L,41896L,41897L, 41898L,41899L,41900L,41901L,41902L,41903L,41904L,41905L,41906L,41907L, 41908L,41909L,41910L,41911L,41912L,41913L,41914L,41915L,41916L,41917L, 41918L,41919L,41920L,41921L,41922L,41923L,41924L,41925L,41926L,41927L, 41928L,41929L,41930L,41931L,41932L,41933L,41934L,41935L,41936L,41937L, 41938L,41939L,41940L,41941L,41942L,41943L,41944L,41945L,41946L,41947L, 41948L,41949L,41950L,41951L,41952L,41953L,41954L,41955L,41956L,41957L, 41958L,41959L,41960L,41961L,41962L,41963L,41964L,41965L,41966L,41967L, 41968L,41969L,41970L,41971L,41972L,41973L,41974L,41975L,41976L,41977L, 41978L,41979L,41980L,41981L,41982L,41983L,41984L,41985L,41986L,41987L, 41988L,41989L,41990L,41991L,41992L,41993L,41994L,41995L,41996L,41997L, 41998L,41999L,42000L,42001L,42002L,42003L,42004L,42005L,42006L,42007L, 42008L,42009L,42010L,42011L,42012L,42013L,42014L,42015L,42016L,42017L, 42018L,42019L,42020L,42021L,42022L,42023L,42024L,42025L,42026L,42027L, 42028L,42029L,42030L,42031L,42032L,42033L,42034L,42035L,42036L,42037L, 42038L,42039L,42040L,42041L,42042L,42043L,42044L,42045L,42046L,42047L, 42048L,42049L,42050L,42051L,42052L,42053L,42054L,42055L,42056L,42057L, 42058L,42059L,42060L,42061L,42062L,42063L,42064L,42065L,42066L,42067L, 42068L,42069L,42070L,42071L,42072L,42073L,42074L,42075L,42076L,42077L, 42078L,42079L,42080L,42081L,42082L,42083L,42084L,42085L,42086L,42087L, 42088L,42089L,42090L,42091L,42092L,42093L,42094L,42095L,42096L,42097L, 42098L,42099L,42100L,42101L,42102L,42103L,42104L,42105L,42106L,42107L, 42108L,42109L,42110L,42111L,42112L,42113L,42114L,42115L,42116L,42117L, 42118L,42119L,42120L,42121L,42122L,42123L,42124L,42125L,42126L,42127L, 42128L,42129L,42130L,42131L,42132L,42133L,42134L,42135L,42136L,42137L, 42138L,42139L,42140L,42141L,42142L,42143L,42144L,42145L,42146L,42147L, 42148L,42149L,42150L,42151L,42152L,42153L,42154L,42155L,42156L,42157L, 42158L,42159L,42160L,42161L,42162L,42163L,42164L,42165L,42166L,42167L, 42168L,42169L,42170L,42171L,42172L,42173L,42174L,42175L,42176L,42177L, 42178L,42179L,42180L,42181L,42182L,42183L,42184L,42185L,42186L,42187L, 42188L,42189L,42190L,42191L,42192L,42193L,42194L,42195L,42196L,42197L, 42198L,42199L,42200L,42201L,42202L,42203L,42204L,42205L,42206L,42207L, 42208L,42209L,42210L,42211L,42212L,42213L,42214L,42215L,42216L,42217L, 42218L,42219L,42220L,42221L,42222L,42223L,42224L,42225L,42226L,42227L, 42228L,42229L,42230L,42231L,42232L,42233L,42234L,42235L,42236L,42237L, 42238L,42239L,42240L,42241L,42242L,42243L,42244L,42245L,42246L,42247L, 42248L,42249L,42250L,42251L,42252L,42253L,42254L,42255L,42256L,42257L, 42258L,42259L,42260L,42261L,42262L,42263L,42264L,42265L,42266L,42267L, 42268L,42269L,42270L,42271L,42272L,42273L,42274L,42275L,42276L,42277L, 42278L,42279L,42280L,42281L,42282L,42283L,42284L,42285L,42286L,42287L, 42288L,42289L,42290L,42291L,42292L,42293L,42294L,42295L,42296L,42297L, 42298L,42299L,42300L,42301L,42302L,42303L,42304L,42305L,42306L,42307L, 42308L,42309L,42310L,42311L,42312L,42313L,42314L,42315L,42316L,42317L, 42318L,42319L,42320L,42321L,42322L,42323L,42324L,42325L,42326L,42327L, 42328L,42329L,42330L,42331L,42332L,42333L,42334L,42335L,42336L,42337L, 42338L,42339L,42340L,42341L,42342L,42343L,42344L,42345L,42346L,42347L, 42348L,42349L,42350L,42351L,42352L,42353L,42354L,42355L,42356L,42357L, 42358L,42359L,42360L,42361L,42362L,42363L,42364L,42365L,42366L,42367L, 42368L,42369L,42370L,42371L,42372L,42373L,42374L,42375L,42376L,42377L, 42378L,42379L,42380L,42381L,42382L,42383L,42384L,42385L,42386L,42387L, 42388L,42389L,42390L,42391L,42392L,42393L,42394L,42395L,42396L,42397L, 42398L,42399L,42400L,42401L,42402L,42403L,42404L,42405L,42406L,42407L, 42408L,42409L,42410L,42411L,42412L,42413L,42414L,42415L,42416L,42417L, 42418L,42419L,42420L,42421L,42422L,42423L,42424L,42425L,42426L,42427L, 42428L,42429L,42430L,42431L,42432L,42433L,42434L,42435L,42436L,42437L, 42438L,42439L,42440L,42441L,42442L,42443L,42444L,42445L,42446L,42447L, 42448L,42449L,42450L,42451L,42452L,42453L,42454L,42455L,42456L,42457L, 42458L,42459L,42460L,42461L,42462L,42463L,42464L,42465L,42466L,42467L, 42468L,42469L,42470L,42471L,42472L,42473L,42474L,42475L,42476L,42477L, 42478L,42479L,42480L,42481L,42482L,42483L,42484L,42485L,42486L,42487L, 42488L,42489L,42490L,42491L,42492L,42493L,42494L,42495L,42496L,42497L, 42498L,42499L,42500L,42501L,42502L,42503L,42504L,42505L,42506L,42507L, 42508L,42509L,42510L,42511L,42512L,42513L,42514L,42515L,42516L,42517L, 42518L,42519L,42520L,42521L,42522L,42523L,42524L,42525L,42526L,42527L, 42528L,42529L,42530L,42531L,42532L,42533L,42534L,42535L,42536L,42537L, 42538L,42539L,42540L,42541L,42542L,42543L,42544L,42545L,42546L,42547L, 42548L,42549L,42550L,42551L,42552L,42553L,42554L,42555L,42556L,42557L, 42558L,42559L,42560L,42560L,42562L,42562L,42564L,42564L,42566L,42566L, 42568L,42568L,42570L,42570L,42572L,42572L,42574L,42574L,42576L,42576L, 42578L,42578L,42580L,42580L,42582L,42582L,42584L,42584L,42586L,42586L, 42588L,42588L,42590L,42590L,42592L,42592L,42594L,42594L,42596L,42596L, 42598L,42598L,42600L,42600L,42602L,42602L,42604L,42604L,42606L,42607L, 42608L,42609L,42610L,42611L,42612L,42613L,42614L,42615L,42616L,42617L, 42618L,42619L,42620L,42621L,42622L,42623L,42624L,42624L,42626L,42626L, 42628L,42628L,42630L,42630L,42632L,42632L,42634L,42634L,42636L,42636L, 42638L,42638L,42640L,42640L,42642L,42642L,42644L,42644L,42646L,42646L, 42648L,42648L,42650L,42650L,42652L,42653L,42654L,42655L,42656L,42657L, 42658L,42659L,42660L,42661L,42662L,42663L,42664L,42665L,42666L,42667L, 42668L,42669L,42670L,42671L,42672L,42673L,42674L,42675L,42676L,42677L, 42678L,42679L,42680L,42681L,42682L,42683L,42684L,42685L,42686L,42687L, 42688L,42689L,42690L,42691L,42692L,42693L,42694L,42695L,42696L,42697L, 42698L,42699L,42700L,42701L,42702L,42703L,42704L,42705L,42706L,42707L, 42708L,42709L,42710L,42711L,42712L,42713L,42714L,42715L,42716L,42717L, 42718L,42719L,42720L,42721L,42722L,42723L,42724L,42725L,42726L,42727L, 42728L,42729L,42730L,42731L,42732L,42733L,42734L,42735L,42736L,42737L, 42738L,42739L,42740L,42741L,42742L,42743L,42744L,42745L,42746L,42747L, 42748L,42749L,42750L,42751L,42752L,42753L,42754L,42755L,42756L,42757L, 42758L,42759L,42760L,42761L,42762L,42763L,42764L,42765L,42766L,42767L, 42768L,42769L,42770L,42771L,42772L,42773L,42774L,42775L,42776L,42777L, 42778L,42779L,42780L,42781L,42782L,42783L,42784L,42785L,42786L,42786L, 42788L,42788L,42790L,42790L,42792L,42792L,42794L,42794L,42796L,42796L, 42798L,42798L,42800L,42801L,42802L,42802L,42804L,42804L,42806L,42806L, 42808L,42808L,42810L,42810L,42812L,42812L,42814L,42814L,42816L,42816L, 42818L,42818L,42820L,42820L,42822L,42822L,42824L,42824L,42826L,42826L, 42828L,42828L,42830L,42830L,42832L,42832L,42834L,42834L,42836L,42836L, 42838L,42838L,42840L,42840L,42842L,42842L,42844L,42844L,42846L,42846L, 42848L,42848L,42850L,42850L,42852L,42852L,42854L,42854L,42856L,42856L, 42858L,42858L,42860L,42860L,42862L,42862L,42864L,42865L,42866L,42867L, 42868L,42869L,42870L,42871L,42872L,42873L,42873L,42875L,42875L,42877L, 42878L,42878L,42880L,42880L,42882L,42882L,42884L,42884L,42886L,42886L, 42888L,42889L,42890L,42891L,42891L,42893L,42894L,42895L,42896L,42896L, 42898L,42898L,42948L,42901L,42902L,42902L,42904L,42904L,42906L,42906L, 42908L,42908L,42910L,42910L,42912L,42912L,42914L,42914L,42916L,42916L, 42918L,42918L,42920L,42920L,42922L,42923L,42924L,42925L,42926L,42927L, 42928L,42929L,42930L,42931L,42932L,42932L,42934L,42934L,42936L,42936L, 42938L,42938L,42940L,42940L,42942L,42942L,42944L,42945L,42946L,42946L, 42948L,42949L,42950L,42951L,42952L,42953L,42954L,42955L,42956L,42957L, 42958L,42959L,42960L,42961L,42962L,42963L,42964L,42965L,42966L,42967L, 42968L,42969L,42970L,42971L,42972L,42973L,42974L,42975L,42976L,42977L, 42978L,42979L,42980L,42981L,42982L,42983L,42984L,42985L,42986L,42987L, 42988L,42989L,42990L,42991L,42992L,42993L,42994L,42995L,42996L,42997L, 42998L,42999L,43000L,43001L,43002L,43003L,43004L,43005L,43006L,43007L, 43008L,43009L,43010L,43011L,43012L,43013L,43014L,43015L,43016L,43017L, 43018L,43019L,43020L,43021L,43022L,43023L,43024L,43025L,43026L,43027L, 43028L,43029L,43030L,43031L,43032L,43033L,43034L,43035L,43036L,43037L, 43038L,43039L,43040L,43041L,43042L,43043L,43044L,43045L,43046L,43047L, 43048L,43049L,43050L,43051L,43052L,43053L,43054L,43055L,43056L,43057L, 43058L,43059L,43060L,43061L,43062L,43063L,43064L,43065L,43066L,43067L, 43068L,43069L,43070L,43071L,43072L,43073L,43074L,43075L,43076L,43077L, 43078L,43079L,43080L,43081L,43082L,43083L,43084L,43085L,43086L,43087L, 43088L,43089L,43090L,43091L,43092L,43093L,43094L,43095L,43096L,43097L, 43098L,43099L,43100L,43101L,43102L,43103L,43104L,43105L,43106L,43107L, 43108L,43109L,43110L,43111L,43112L,43113L,43114L,43115L,43116L,43117L, 43118L,43119L,43120L,43121L,43122L,43123L,43124L,43125L,43126L,43127L, 43128L,43129L,43130L,43131L,43132L,43133L,43134L,43135L,43136L,43137L, 43138L,43139L,43140L,43141L,43142L,43143L,43144L,43145L,43146L,43147L, 43148L,43149L,43150L,43151L,43152L,43153L,43154L,43155L,43156L,43157L, 43158L,43159L,43160L,43161L,43162L,43163L,43164L,43165L,43166L,43167L, 43168L,43169L,43170L,43171L,43172L,43173L,43174L,43175L,43176L,43177L, 43178L,43179L,43180L,43181L,43182L,43183L,43184L,43185L,43186L,43187L, 43188L,43189L,43190L,43191L,43192L,43193L,43194L,43195L,43196L,43197L, 43198L,43199L,43200L,43201L,43202L,43203L,43204L,43205L,43206L,43207L, 43208L,43209L,43210L,43211L,43212L,43213L,43214L,43215L,43216L,43217L, 43218L,43219L,43220L,43221L,43222L,43223L,43224L,43225L,43226L,43227L, 43228L,43229L,43230L,43231L,43232L,43233L,43234L,43235L,43236L,43237L, 43238L,43239L,43240L,43241L,43242L,43243L,43244L,43245L,43246L,43247L, 43248L,43249L,43250L,43251L,43252L,43253L,43254L,43255L,43256L,43257L, 43258L,43259L,43260L,43261L,43262L,43263L,43264L,43265L,43266L,43267L, 43268L,43269L,43270L,43271L,43272L,43273L,43274L,43275L,43276L,43277L, 43278L,43279L,43280L,43281L,43282L,43283L,43284L,43285L,43286L,43287L, 43288L,43289L,43290L,43291L,43292L,43293L,43294L,43295L,43296L,43297L, 43298L,43299L,43300L,43301L,43302L,43303L,43304L,43305L,43306L,43307L, 43308L,43309L,43310L,43311L,43312L,43313L,43314L,43315L,43316L,43317L, 43318L,43319L,43320L,43321L,43322L,43323L,43324L,43325L,43326L,43327L, 43328L,43329L,43330L,43331L,43332L,43333L,43334L,43335L,43336L,43337L, 43338L,43339L,43340L,43341L,43342L,43343L,43344L,43345L,43346L,43347L, 43348L,43349L,43350L,43351L,43352L,43353L,43354L,43355L,43356L,43357L, 43358L,43359L,43360L,43361L,43362L,43363L,43364L,43365L,43366L,43367L, 43368L,43369L,43370L,43371L,43372L,43373L,43374L,43375L,43376L,43377L, 43378L,43379L,43380L,43381L,43382L,43383L,43384L,43385L,43386L,43387L, 43388L,43389L,43390L,43391L,43392L,43393L,43394L,43395L,43396L,43397L, 43398L,43399L,43400L,43401L,43402L,43403L,43404L,43405L,43406L,43407L, 43408L,43409L,43410L,43411L,43412L,43413L,43414L,43415L,43416L,43417L, 43418L,43419L,43420L,43421L,43422L,43423L,43424L,43425L,43426L,43427L, 43428L,43429L,43430L,43431L,43432L,43433L,43434L,43435L,43436L,43437L, 43438L,43439L,43440L,43441L,43442L,43443L,43444L,43445L,43446L,43447L, 43448L,43449L,43450L,43451L,43452L,43453L,43454L,43455L,43456L,43457L, 43458L,43459L,43460L,43461L,43462L,43463L,43464L,43465L,43466L,43467L, 43468L,43469L,43470L,43471L,43472L,43473L,43474L,43475L,43476L,43477L, 43478L,43479L,43480L,43481L,43482L,43483L,43484L,43485L,43486L,43487L, 43488L,43489L,43490L,43491L,43492L,43493L,43494L,43495L,43496L,43497L, 43498L,43499L,43500L,43501L,43502L,43503L,43504L,43505L,43506L,43507L, 43508L,43509L,43510L,43511L,43512L,43513L,43514L,43515L,43516L,43517L, 43518L,43519L,43520L,43521L,43522L,43523L,43524L,43525L,43526L,43527L, 43528L,43529L,43530L,43531L,43532L,43533L,43534L,43535L,43536L,43537L, 43538L,43539L,43540L,43541L,43542L,43543L,43544L,43545L,43546L,43547L, 43548L,43549L,43550L,43551L,43552L,43553L,43554L,43555L,43556L,43557L, 43558L,43559L,43560L,43561L,43562L,43563L,43564L,43565L,43566L,43567L, 43568L,43569L,43570L,43571L,43572L,43573L,43574L,43575L,43576L,43577L, 43578L,43579L,43580L,43581L,43582L,43583L,43584L,43585L,43586L,43587L, 43588L,43589L,43590L,43591L,43592L,43593L,43594L,43595L,43596L,43597L, 43598L,43599L,43600L,43601L,43602L,43603L,43604L,43605L,43606L,43607L, 43608L,43609L,43610L,43611L,43612L,43613L,43614L,43615L,43616L,43617L, 43618L,43619L,43620L,43621L,43622L,43623L,43624L,43625L,43626L,43627L, 43628L,43629L,43630L,43631L,43632L,43633L,43634L,43635L,43636L,43637L, 43638L,43639L,43640L,43641L,43642L,43643L,43644L,43645L,43646L,43647L, 43648L,43649L,43650L,43651L,43652L,43653L,43654L,43655L,43656L,43657L, 43658L,43659L,43660L,43661L,43662L,43663L,43664L,43665L,43666L,43667L, 43668L,43669L,43670L,43671L,43672L,43673L,43674L,43675L,43676L,43677L, 43678L,43679L,43680L,43681L,43682L,43683L,43684L,43685L,43686L,43687L, 43688L,43689L,43690L,43691L,43692L,43693L,43694L,43695L,43696L,43697L, 43698L,43699L,43700L,43701L,43702L,43703L,43704L,43705L,43706L,43707L, 43708L,43709L,43710L,43711L,43712L,43713L,43714L,43715L,43716L,43717L, 43718L,43719L,43720L,43721L,43722L,43723L,43724L,43725L,43726L,43727L, 43728L,43729L,43730L,43731L,43732L,43733L,43734L,43735L,43736L,43737L, 43738L,43739L,43740L,43741L,43742L,43743L,43744L,43745L,43746L,43747L, 43748L,43749L,43750L,43751L,43752L,43753L,43754L,43755L,43756L,43757L, 43758L,43759L,43760L,43761L,43762L,43763L,43764L,43765L,43766L,43767L, 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5040,5041,5042,5043,5044,5045,5046,5047,5048,5049,5050,5051,5052,5053,5054, 5055,5056,5057,5058,5059,5060,5061,5062,5063,5064,5065,5066,5067,5068,5069, 5070,5071,5072,5073,5074,5075,5076,5077,5078,5079,5080,5081,5082,5083,5084, 5085,5086,5087,5088,5089,5090,5091,5092,5093,5094,5095,5096,5097,5098,5099, 5100,5101,5102,5103,43968L,43969L,43970L,43971L,43972L,43973L,43974L, 43975L,43976L,43977L,43978L,43979L,43980L,43981L,43982L,43983L,43984L, 43985L,43986L,43987L,43988L,43989L,43990L,43991L,43992L,43993L,43994L, 43995L,43996L,43997L,43998L,43999L,44000L,44001L,44002L,44003L,44004L, 44005L,44006L,44007L,44008L,44009L,44010L,44011L,44012L,44013L,44014L, 44015L,44016L,44017L,44018L,44019L,44020L,44021L,44022L,44023L,44024L, 44025L,44026L,44027L,44028L,44029L,44030L,44031L,44032L,44033L,44034L, 44035L,44036L,44037L,44038L,44039L,44040L,44041L,44042L,44043L,44044L, 44045L,44046L,44047L,44048L,44049L,44050L,44051L,44052L,44053L,44054L, 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44195L,44196L,44197L,44198L,44199L,44200L,44201L,44202L,44203L,44204L, 44205L,44206L,44207L,44208L,44209L,44210L,44211L,44212L,44213L,44214L, 44215L,44216L,44217L,44218L,44219L,44220L,44221L,44222L,44223L,44224L, 44225L,44226L,44227L,44228L,44229L,44230L,44231L,44232L,44233L,44234L, 44235L,44236L,44237L,44238L,44239L,44240L,44241L,44242L,44243L,44244L, 44245L,44246L,44247L,44248L,44249L,44250L,44251L,44252L,44253L,44254L, 44255L,44256L,44257L,44258L,44259L,44260L,44261L,44262L,44263L,44264L, 44265L,44266L,44267L,44268L,44269L,44270L,44271L,44272L,44273L,44274L, 44275L,44276L,44277L,44278L,44279L,44280L,44281L,44282L,44283L,44284L, 44285L,44286L,44287L,44288L,44289L,44290L,44291L,44292L,44293L,44294L, 44295L,44296L,44297L,44298L,44299L,44300L,44301L,44302L,44303L,44304L, 44305L,44306L,44307L,44308L,44309L,44310L,44311L,44312L,44313L,44314L, 44315L,44316L,44317L,44318L,44319L,44320L,44321L,44322L,44323L,44324L, 44325L,44326L,44327L,44328L,44329L,44330L,44331L,44332L,44333L,44334L, 44335L,44336L,44337L,44338L,44339L,44340L,44341L,44342L,44343L,44344L, 44345L,44346L,44347L,44348L,44349L,44350L,44351L,44352L,44353L,44354L, 44355L,44356L,44357L,44358L,44359L,44360L,44361L,44362L,44363L,44364L, 44365L,44366L,44367L,44368L,44369L,44370L,44371L,44372L,44373L,44374L, 44375L,44376L,44377L,44378L,44379L,44380L,44381L,44382L,44383L,44384L, 44385L,44386L,44387L,44388L,44389L,44390L,44391L,44392L,44393L,44394L, 44395L,44396L,44397L,44398L,44399L,44400L,44401L,44402L,44403L,44404L, 44405L,44406L,44407L,44408L,44409L,44410L,44411L,44412L,44413L,44414L, 44415L,44416L,44417L,44418L,44419L,44420L,44421L,44422L,44423L,44424L, 44425L,44426L,44427L,44428L,44429L,44430L,44431L,44432L,44433L,44434L, 44435L,44436L,44437L,44438L,44439L,44440L,44441L,44442L,44443L,44444L, 44445L,44446L,44447L,44448L,44449L,44450L,44451L,44452L,44453L,44454L, 44455L,44456L,44457L,44458L,44459L,44460L,44461L,44462L,44463L,44464L, 44465L,44466L,44467L,44468L,44469L,44470L,44471L,44472L,44473L,44474L, 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44615L,44616L,44617L,44618L,44619L,44620L,44621L,44622L,44623L,44624L, 44625L,44626L,44627L,44628L,44629L,44630L,44631L,44632L,44633L,44634L, 44635L,44636L,44637L,44638L,44639L,44640L,44641L,44642L,44643L,44644L, 44645L,44646L,44647L,44648L,44649L,44650L,44651L,44652L,44653L,44654L, 44655L,44656L,44657L,44658L,44659L,44660L,44661L,44662L,44663L,44664L, 44665L,44666L,44667L,44668L,44669L,44670L,44671L,44672L,44673L,44674L, 44675L,44676L,44677L,44678L,44679L,44680L,44681L,44682L,44683L,44684L, 44685L,44686L,44687L,44688L,44689L,44690L,44691L,44692L,44693L,44694L, 44695L,44696L,44697L,44698L,44699L,44700L,44701L,44702L,44703L,44704L, 44705L,44706L,44707L,44708L,44709L,44710L,44711L,44712L,44713L,44714L, 44715L,44716L,44717L,44718L,44719L,44720L,44721L,44722L,44723L,44724L, 44725L,44726L,44727L,44728L,44729L,44730L,44731L,44732L,44733L,44734L, 44735L,44736L,44737L,44738L,44739L,44740L,44741L,44742L,44743L,44744L, 44745L,44746L,44747L,44748L,44749L,44750L,44751L,44752L,44753L,44754L, 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44895L,44896L,44897L,44898L,44899L,44900L,44901L,44902L,44903L,44904L, 44905L,44906L,44907L,44908L,44909L,44910L,44911L,44912L,44913L,44914L, 44915L,44916L,44917L,44918L,44919L,44920L,44921L,44922L,44923L,44924L, 44925L,44926L,44927L,44928L,44929L,44930L,44931L,44932L,44933L,44934L, 44935L,44936L,44937L,44938L,44939L,44940L,44941L,44942L,44943L,44944L, 44945L,44946L,44947L,44948L,44949L,44950L,44951L,44952L,44953L,44954L, 44955L,44956L,44957L,44958L,44959L,44960L,44961L,44962L,44963L,44964L, 44965L,44966L,44967L,44968L,44969L,44970L,44971L,44972L,44973L,44974L, 44975L,44976L,44977L,44978L,44979L,44980L,44981L,44982L,44983L,44984L, 44985L,44986L,44987L,44988L,44989L,44990L,44991L,44992L,44993L,44994L, 44995L,44996L,44997L,44998L,44999L,45000L,45001L,45002L,45003L,45004L, 45005L,45006L,45007L,45008L,45009L,45010L,45011L,45012L,45013L,45014L, 45015L,45016L,45017L,45018L,45019L,45020L,45021L,45022L,45023L,45024L, 45025L,45026L,45027L,45028L,45029L,45030L,45031L,45032L,45033L,45034L, 45035L,45036L,45037L,45038L,45039L,45040L,45041L,45042L,45043L,45044L, 45045L,45046L,45047L,45048L,45049L,45050L,45051L,45052L,45053L,45054L, 45055L,45056L,45057L,45058L,45059L,45060L,45061L,45062L,45063L,45064L, 45065L,45066L,45067L,45068L,45069L,45070L,45071L,45072L,45073L,45074L, 45075L,45076L,45077L,45078L,45079L,45080L,45081L,45082L,45083L,45084L, 45085L,45086L,45087L,45088L,45089L,45090L,45091L,45092L,45093L,45094L, 45095L,45096L,45097L,45098L,45099L,45100L,45101L,45102L,45103L,45104L, 45105L,45106L,45107L,45108L,45109L,45110L,45111L,45112L,45113L,45114L, 45115L,45116L,45117L,45118L,45119L,45120L,45121L,45122L,45123L,45124L, 45125L,45126L,45127L,45128L,45129L,45130L,45131L,45132L,45133L,45134L, 45135L,45136L,45137L,45138L,45139L,45140L,45141L,45142L,45143L,45144L, 45145L,45146L,45147L,45148L,45149L,45150L,45151L,45152L,45153L,45154L, 45155L,45156L,45157L,45158L,45159L,45160L,45161L,45162L,45163L,45164L, 45165L,45166L,45167L,45168L,45169L,45170L,45171L,45172L,45173L,45174L, 45175L,45176L,45177L,45178L,45179L,45180L,45181L,45182L,45183L,45184L, 45185L,45186L,45187L,45188L,45189L,45190L,45191L,45192L,45193L,45194L, 45195L,45196L,45197L,45198L,45199L,45200L,45201L,45202L,45203L,45204L, 45205L,45206L,45207L,45208L,45209L,45210L,45211L,45212L,45213L,45214L, 45215L,45216L,45217L,45218L,45219L,45220L,45221L,45222L,45223L,45224L, 45225L,45226L,45227L,45228L,45229L,45230L,45231L,45232L,45233L,45234L, 45235L,45236L,45237L,45238L,45239L,45240L,45241L,45242L,45243L,45244L, 45245L,45246L,45247L,45248L,45249L,45250L,45251L,45252L,45253L,45254L, 45255L,45256L,45257L,45258L,45259L,45260L,45261L,45262L,45263L,45264L, 45265L,45266L,45267L,45268L,45269L,45270L,45271L,45272L,45273L,45274L, 45275L,45276L,45277L,45278L,45279L,45280L,45281L,45282L,45283L,45284L, 45285L,45286L,45287L,45288L,45289L,45290L,45291L,45292L,45293L,45294L, 45295L,45296L,45297L,45298L,45299L,45300L,45301L,45302L,45303L,45304L, 45305L,45306L,45307L,45308L,45309L,45310L,45311L,45312L,45313L,45314L, 45315L,45316L,45317L,45318L,45319L,45320L,45321L,45322L,45323L,45324L, 45325L,45326L,45327L,45328L,45329L,45330L,45331L,45332L,45333L,45334L, 45335L,45336L,45337L,45338L,45339L,45340L,45341L,45342L,45343L,45344L, 45345L,45346L,45347L,45348L,45349L,45350L,45351L,45352L,45353L,45354L, 45355L,45356L,45357L,45358L,45359L,45360L,45361L,45362L,45363L,45364L, 45365L,45366L,45367L,45368L,45369L,45370L,45371L,45372L,45373L,45374L, 45375L,45376L,45377L,45378L,45379L,45380L,45381L,45382L,45383L,45384L, 45385L,45386L,45387L,45388L,45389L,45390L,45391L,45392L,45393L,45394L, 45395L,45396L,45397L,45398L,45399L,45400L,45401L,45402L,45403L,45404L, 45405L,45406L,45407L,45408L,45409L,45410L,45411L,45412L,45413L,45414L, 45415L,45416L,45417L,45418L,45419L,45420L,45421L,45422L,45423L,45424L, 45425L,45426L,45427L,45428L,45429L,45430L,45431L,45432L,45433L,45434L, 45435L,45436L,45437L,45438L,45439L,45440L,45441L,45442L,45443L,45444L, 45445L,45446L,45447L,45448L,45449L,45450L,45451L,45452L,45453L,45454L, 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45875L,45876L,45877L,45878L,45879L,45880L,45881L,45882L,45883L,45884L, 45885L,45886L,45887L,45888L,45889L,45890L,45891L,45892L,45893L,45894L, 45895L,45896L,45897L,45898L,45899L,45900L,45901L,45902L,45903L,45904L, 45905L,45906L,45907L,45908L,45909L,45910L,45911L,45912L,45913L,45914L, 45915L,45916L,45917L,45918L,45919L,45920L,45921L,45922L,45923L,45924L, 45925L,45926L,45927L,45928L,45929L,45930L,45931L,45932L,45933L,45934L, 45935L,45936L,45937L,45938L,45939L,45940L,45941L,45942L,45943L,45944L, 45945L,45946L,45947L,45948L,45949L,45950L,45951L,45952L,45953L,45954L, 45955L,45956L,45957L,45958L,45959L,45960L,45961L,45962L,45963L,45964L, 45965L,45966L,45967L,45968L,45969L,45970L,45971L,45972L,45973L,45974L, 45975L,45976L,45977L,45978L,45979L,45980L,45981L,45982L,45983L,45984L, 45985L,45986L,45987L,45988L,45989L,45990L,45991L,45992L,45993L,45994L, 45995L,45996L,45997L,45998L,45999L,46000L,46001L,46002L,46003L,46004L, 46005L,46006L,46007L,46008L,46009L,46010L,46011L,46012L,46013L,46014L, 46015L,46016L,46017L,46018L,46019L,46020L,46021L,46022L,46023L,46024L, 46025L,46026L,46027L,46028L,46029L,46030L,46031L,46032L,46033L,46034L, 46035L,46036L,46037L,46038L,46039L,46040L,46041L,46042L,46043L,46044L, 46045L,46046L,46047L,46048L,46049L,46050L,46051L,46052L,46053L,46054L, 46055L,46056L,46057L,46058L,46059L,46060L,46061L,46062L,46063L,46064L, 46065L,46066L,46067L,46068L,46069L,46070L,46071L,46072L,46073L,46074L, 46075L,46076L,46077L,46078L,46079L,46080L,46081L,46082L,46083L,46084L, 46085L,46086L,46087L,46088L,46089L,46090L,46091L,46092L,46093L,46094L, 46095L,46096L,46097L,46098L,46099L,46100L,46101L,46102L,46103L,46104L, 46105L,46106L,46107L,46108L,46109L,46110L,46111L,46112L,46113L,46114L, 46115L,46116L,46117L,46118L,46119L,46120L,46121L,46122L,46123L,46124L, 46125L,46126L,46127L,46128L,46129L,46130L,46131L,46132L,46133L,46134L, 46135L,46136L,46137L,46138L,46139L,46140L,46141L,46142L,46143L,46144L, 46145L,46146L,46147L,46148L,46149L,46150L,46151L,46152L,46153L,46154L, 46155L,46156L,46157L,46158L,46159L,46160L,46161L,46162L,46163L,46164L, 46165L,46166L,46167L,46168L,46169L,46170L,46171L,46172L,46173L,46174L, 46175L,46176L,46177L,46178L,46179L,46180L,46181L,46182L,46183L,46184L, 46185L,46186L,46187L,46188L,46189L,46190L,46191L,46192L,46193L,46194L, 46195L,46196L,46197L,46198L,46199L,46200L,46201L,46202L,46203L,46204L, 46205L,46206L,46207L,46208L,46209L,46210L,46211L,46212L,46213L,46214L, 46215L,46216L,46217L,46218L,46219L,46220L,46221L,46222L,46223L,46224L, 46225L,46226L,46227L,46228L,46229L,46230L,46231L,46232L,46233L,46234L, 46235L,46236L,46237L,46238L,46239L,46240L,46241L,46242L,46243L,46244L, 46245L,46246L,46247L,46248L,46249L,46250L,46251L,46252L,46253L,46254L, 46255L,46256L,46257L,46258L,46259L,46260L,46261L,46262L,46263L,46264L, 46265L,46266L,46267L,46268L,46269L,46270L,46271L,46272L,46273L,46274L, 46275L,46276L,46277L,46278L,46279L,46280L,46281L,46282L,46283L,46284L, 46285L,46286L,46287L,46288L,46289L,46290L,46291L,46292L,46293L,46294L, 46295L,46296L,46297L,46298L,46299L,46300L,46301L,46302L,46303L,46304L, 46305L,46306L,46307L,46308L,46309L,46310L,46311L,46312L,46313L,46314L, 46315L,46316L,46317L,46318L,46319L,46320L,46321L,46322L,46323L,46324L, 46325L,46326L,46327L,46328L,46329L,46330L,46331L,46332L,46333L,46334L, 46335L,46336L,46337L,46338L,46339L,46340L,46341L,46342L,46343L,46344L, 46345L,46346L,46347L,46348L,46349L,46350L,46351L,46352L,46353L,46354L, 46355L,46356L,46357L,46358L,46359L,46360L,46361L,46362L,46363L,46364L, 46365L,46366L,46367L,46368L,46369L,46370L,46371L,46372L,46373L,46374L, 46375L,46376L,46377L,46378L,46379L,46380L,46381L,46382L,46383L,46384L, 46385L,46386L,46387L,46388L,46389L,46390L,46391L,46392L,46393L,46394L, 46395L,46396L,46397L,46398L,46399L,46400L,46401L,46402L,46403L,46404L, 46405L,46406L,46407L,46408L,46409L,46410L,46411L,46412L,46413L,46414L, 46415L,46416L,46417L,46418L,46419L,46420L,46421L,46422L,46423L,46424L, 46425L,46426L,46427L,46428L,46429L,46430L,46431L,46432L,46433L,46434L, 46435L,46436L,46437L,46438L,46439L,46440L,46441L,46442L,46443L,46444L, 46445L,46446L,46447L,46448L,46449L,46450L,46451L,46452L,46453L,46454L, 46455L,46456L,46457L,46458L,46459L,46460L,46461L,46462L,46463L,46464L, 46465L,46466L,46467L,46468L,46469L,46470L,46471L,46472L,46473L,46474L, 46475L,46476L,46477L,46478L,46479L,46480L,46481L,46482L,46483L,46484L, 46485L,46486L,46487L,46488L,46489L,46490L,46491L,46492L,46493L,46494L, 46495L,46496L,46497L,46498L,46499L,46500L,46501L,46502L,46503L,46504L, 46505L,46506L,46507L,46508L,46509L,46510L,46511L,46512L,46513L,46514L, 46515L,46516L,46517L,46518L,46519L,46520L,46521L,46522L,46523L,46524L, 46525L,46526L,46527L,46528L,46529L,46530L,46531L,46532L,46533L,46534L, 46535L,46536L,46537L,46538L,46539L,46540L,46541L,46542L,46543L,46544L, 46545L,46546L,46547L,46548L,46549L,46550L,46551L,46552L,46553L,46554L, 46555L,46556L,46557L,46558L,46559L,46560L,46561L,46562L,46563L,46564L, 46565L,46566L,46567L,46568L,46569L,46570L,46571L,46572L,46573L,46574L, 46575L,46576L,46577L,46578L,46579L,46580L,46581L,46582L,46583L,46584L, 46585L,46586L,46587L,46588L,46589L,46590L,46591L,46592L,46593L,46594L, 46595L,46596L,46597L,46598L,46599L,46600L,46601L,46602L,46603L,46604L, 46605L,46606L,46607L,46608L,46609L,46610L,46611L,46612L,46613L,46614L, 46615L,46616L,46617L,46618L,46619L,46620L,46621L,46622L,46623L,46624L, 46625L,46626L,46627L,46628L,46629L,46630L,46631L,46632L,46633L,46634L, 46635L,46636L,46637L,46638L,46639L,46640L,46641L,46642L,46643L,46644L, 46645L,46646L,46647L,46648L,46649L,46650L,46651L,46652L,46653L,46654L, 46655L,46656L,46657L,46658L,46659L,46660L,46661L,46662L,46663L,46664L, 46665L,46666L,46667L,46668L,46669L,46670L,46671L,46672L,46673L,46674L, 46675L,46676L,46677L,46678L,46679L,46680L,46681L,46682L,46683L,46684L, 46685L,46686L,46687L,46688L,46689L,46690L,46691L,46692L,46693L,46694L, 46695L,46696L,46697L,46698L,46699L,46700L,46701L,46702L,46703L,46704L, 46705L,46706L,46707L,46708L,46709L,46710L,46711L,46712L,46713L,46714L, 46715L,46716L,46717L,46718L,46719L,46720L,46721L,46722L,46723L,46724L, 46725L,46726L,46727L,46728L,46729L,46730L,46731L,46732L,46733L,46734L, 46735L,46736L,46737L,46738L,46739L,46740L,46741L,46742L,46743L,46744L, 46745L,46746L,46747L,46748L,46749L,46750L,46751L,46752L,46753L,46754L, 46755L,46756L,46757L,46758L,46759L,46760L,46761L,46762L,46763L,46764L, 46765L,46766L,46767L,46768L,46769L,46770L,46771L,46772L,46773L,46774L, 46775L,46776L,46777L,46778L,46779L,46780L,46781L,46782L,46783L,46784L, 46785L,46786L,46787L,46788L,46789L,46790L,46791L,46792L,46793L,46794L, 46795L,46796L,46797L,46798L,46799L,46800L,46801L,46802L,46803L,46804L, 46805L,46806L,46807L,46808L,46809L,46810L,46811L,46812L,46813L,46814L, 46815L,46816L,46817L,46818L,46819L,46820L,46821L,46822L,46823L,46824L, 46825L,46826L,46827L,46828L,46829L,46830L,46831L,46832L,46833L,46834L, 46835L,46836L,46837L,46838L,46839L,46840L,46841L,46842L,46843L,46844L, 46845L,46846L,46847L,46848L,46849L,46850L,46851L,46852L,46853L,46854L, 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47275L,47276L,47277L,47278L,47279L,47280L,47281L,47282L,47283L,47284L, 47285L,47286L,47287L,47288L,47289L,47290L,47291L,47292L,47293L,47294L, 47295L,47296L,47297L,47298L,47299L,47300L,47301L,47302L,47303L,47304L, 47305L,47306L,47307L,47308L,47309L,47310L,47311L,47312L,47313L,47314L, 47315L,47316L,47317L,47318L,47319L,47320L,47321L,47322L,47323L,47324L, 47325L,47326L,47327L,47328L,47329L,47330L,47331L,47332L,47333L,47334L, 47335L,47336L,47337L,47338L,47339L,47340L,47341L,47342L,47343L,47344L, 47345L,47346L,47347L,47348L,47349L,47350L,47351L,47352L,47353L,47354L, 47355L,47356L,47357L,47358L,47359L,47360L,47361L,47362L,47363L,47364L, 47365L,47366L,47367L,47368L,47369L,47370L,47371L,47372L,47373L,47374L, 47375L,47376L,47377L,47378L,47379L,47380L,47381L,47382L,47383L,47384L, 47385L,47386L,47387L,47388L,47389L,47390L,47391L,47392L,47393L,47394L, 47395L,47396L,47397L,47398L,47399L,47400L,47401L,47402L,47403L,47404L, 47405L,47406L,47407L,47408L,47409L,47410L,47411L,47412L,47413L,47414L, 47415L,47416L,47417L,47418L,47419L,47420L,47421L,47422L,47423L,47424L, 47425L,47426L,47427L,47428L,47429L,47430L,47431L,47432L,47433L,47434L, 47435L,47436L,47437L,47438L,47439L,47440L,47441L,47442L,47443L,47444L, 47445L,47446L,47447L,47448L,47449L,47450L,47451L,47452L,47453L,47454L, 47455L,47456L,47457L,47458L,47459L,47460L,47461L,47462L,47463L,47464L, 47465L,47466L,47467L,47468L,47469L,47470L,47471L,47472L,47473L,47474L, 47475L,47476L,47477L,47478L,47479L,47480L,47481L,47482L,47483L,47484L, 47485L,47486L,47487L,47488L,47489L,47490L,47491L,47492L,47493L,47494L, 47495L,47496L,47497L,47498L,47499L,47500L,47501L,47502L,47503L,47504L, 47505L,47506L,47507L,47508L,47509L,47510L,47511L,47512L,47513L,47514L, 47515L,47516L,47517L,47518L,47519L,47520L,47521L,47522L,47523L,47524L, 47525L,47526L,47527L,47528L,47529L,47530L,47531L,47532L,47533L,47534L, 47535L,47536L,47537L,47538L,47539L,47540L,47541L,47542L,47543L,47544L, 47545L,47546L,47547L,47548L,47549L,47550L,47551L,47552L,47553L,47554L, 47555L,47556L,47557L,47558L,47559L,47560L,47561L,47562L,47563L,47564L, 47565L,47566L,47567L,47568L,47569L,47570L,47571L,47572L,47573L,47574L, 47575L,47576L,47577L,47578L,47579L,47580L,47581L,47582L,47583L,47584L, 47585L,47586L,47587L,47588L,47589L,47590L,47591L,47592L,47593L,47594L, 47595L,47596L,47597L,47598L,47599L,47600L,47601L,47602L,47603L,47604L, 47605L,47606L,47607L,47608L,47609L,47610L,47611L,47612L,47613L,47614L, 47615L,47616L,47617L,47618L,47619L,47620L,47621L,47622L,47623L,47624L, 47625L,47626L,47627L,47628L,47629L,47630L,47631L,47632L,47633L,47634L, 47635L,47636L,47637L,47638L,47639L,47640L,47641L,47642L,47643L,47644L, 47645L,47646L,47647L,47648L,47649L,47650L,47651L,47652L,47653L,47654L, 47655L,47656L,47657L,47658L,47659L,47660L,47661L,47662L,47663L,47664L, 47665L,47666L,47667L,47668L,47669L,47670L,47671L,47672L,47673L,47674L, 47675L,47676L,47677L,47678L,47679L,47680L,47681L,47682L,47683L,47684L, 47685L,47686L,47687L,47688L,47689L,47690L,47691L,47692L,47693L,47694L, 47695L,47696L,47697L,47698L,47699L,47700L,47701L,47702L,47703L,47704L, 47705L,47706L,47707L,47708L,47709L,47710L,47711L,47712L,47713L,47714L, 47715L,47716L,47717L,47718L,47719L,47720L,47721L,47722L,47723L,47724L, 47725L,47726L,47727L,47728L,47729L,47730L,47731L,47732L,47733L,47734L, 47735L,47736L,47737L,47738L,47739L,47740L,47741L,47742L,47743L,47744L, 47745L,47746L,47747L,47748L,47749L,47750L,47751L,47752L,47753L,47754L, 47755L,47756L,47757L,47758L,47759L,47760L,47761L,47762L,47763L,47764L, 47765L,47766L,47767L,47768L,47769L,47770L,47771L,47772L,47773L,47774L, 47775L,47776L,47777L,47778L,47779L,47780L,47781L,47782L,47783L,47784L, 47785L,47786L,47787L,47788L,47789L,47790L,47791L,47792L,47793L,47794L, 47795L,47796L,47797L,47798L,47799L,47800L,47801L,47802L,47803L,47804L, 47805L,47806L,47807L,47808L,47809L,47810L,47811L,47812L,47813L,47814L, 47815L,47816L,47817L,47818L,47819L,47820L,47821L,47822L,47823L,47824L, 47825L,47826L,47827L,47828L,47829L,47830L,47831L,47832L,47833L,47834L, 47835L,47836L,47837L,47838L,47839L,47840L,47841L,47842L,47843L,47844L, 47845L,47846L,47847L,47848L,47849L,47850L,47851L,47852L,47853L,47854L, 47855L,47856L,47857L,47858L,47859L,47860L,47861L,47862L,47863L,47864L, 47865L,47866L,47867L,47868L,47869L,47870L,47871L,47872L,47873L,47874L, 47875L,47876L,47877L,47878L,47879L,47880L,47881L,47882L,47883L,47884L, 47885L,47886L,47887L,47888L,47889L,47890L,47891L,47892L,47893L,47894L, 47895L,47896L,47897L,47898L,47899L,47900L,47901L,47902L,47903L,47904L, 47905L,47906L,47907L,47908L,47909L,47910L,47911L,47912L,47913L,47914L, 47915L,47916L,47917L,47918L,47919L,47920L,47921L,47922L,47923L,47924L, 47925L,47926L,47927L,47928L,47929L,47930L,47931L,47932L,47933L,47934L, 47935L,47936L,47937L,47938L,47939L,47940L,47941L,47942L,47943L,47944L, 47945L,47946L,47947L,47948L,47949L,47950L,47951L,47952L,47953L,47954L, 47955L,47956L,47957L,47958L,47959L,47960L,47961L,47962L,47963L,47964L, 47965L,47966L,47967L,47968L,47969L,47970L,47971L,47972L,47973L,47974L, 47975L,47976L,47977L,47978L,47979L,47980L,47981L,47982L,47983L,47984L, 47985L,47986L,47987L,47988L,47989L,47990L,47991L,47992L,47993L,47994L, 47995L,47996L,47997L,47998L,47999L,48000L,48001L,48002L,48003L,48004L, 48005L,48006L,48007L,48008L,48009L,48010L,48011L,48012L,48013L,48014L, 48015L,48016L,48017L,48018L,48019L,48020L,48021L,48022L,48023L,48024L, 48025L,48026L,48027L,48028L,48029L,48030L,48031L,48032L,48033L,48034L, 48035L,48036L,48037L,48038L,48039L,48040L,48041L,48042L,48043L,48044L, 48045L,48046L,48047L,48048L,48049L,48050L,48051L,48052L,48053L,48054L, 48055L,48056L,48057L,48058L,48059L,48060L,48061L,48062L,48063L,48064L, 48065L,48066L,48067L,48068L,48069L,48070L,48071L,48072L,48073L,48074L, 48075L,48076L,48077L,48078L,48079L,48080L,48081L,48082L,48083L,48084L, 48085L,48086L,48087L,48088L,48089L,48090L,48091L,48092L,48093L,48094L, 48095L,48096L,48097L,48098L,48099L,48100L,48101L,48102L,48103L,48104L, 48105L,48106L,48107L,48108L,48109L,48110L,48111L,48112L,48113L,48114L, 48115L,48116L,48117L,48118L,48119L,48120L,48121L,48122L,48123L,48124L, 48125L,48126L,48127L,48128L,48129L,48130L,48131L,48132L,48133L,48134L, 48135L,48136L,48137L,48138L,48139L,48140L,48141L,48142L,48143L,48144L, 48145L,48146L,48147L,48148L,48149L,48150L,48151L,48152L,48153L,48154L, 48155L,48156L,48157L,48158L,48159L,48160L,48161L,48162L,48163L,48164L, 48165L,48166L,48167L,48168L,48169L,48170L,48171L,48172L,48173L,48174L, 48175L,48176L,48177L,48178L,48179L,48180L,48181L,48182L,48183L,48184L, 48185L,48186L,48187L,48188L,48189L,48190L,48191L,48192L,48193L,48194L, 48195L,48196L,48197L,48198L,48199L,48200L,48201L,48202L,48203L,48204L, 48205L,48206L,48207L,48208L,48209L,48210L,48211L,48212L,48213L,48214L, 48215L,48216L,48217L,48218L,48219L,48220L,48221L,48222L,48223L,48224L, 48225L,48226L,48227L,48228L,48229L,48230L,48231L,48232L,48233L,48234L, 48235L,48236L,48237L,48238L,48239L,48240L,48241L,48242L,48243L,48244L, 48245L,48246L,48247L,48248L,48249L,48250L,48251L,48252L,48253L,48254L, 48255L,48256L,48257L,48258L,48259L,48260L,48261L,48262L,48263L,48264L, 48265L,48266L,48267L,48268L,48269L,48270L,48271L,48272L,48273L,48274L, 48275L,48276L,48277L,48278L,48279L,48280L,48281L,48282L,48283L,48284L, 48285L,48286L,48287L,48288L,48289L,48290L,48291L,48292L,48293L,48294L, 48295L,48296L,48297L,48298L,48299L,48300L,48301L,48302L,48303L,48304L, 48305L,48306L,48307L,48308L,48309L,48310L,48311L,48312L,48313L,48314L, 48315L,48316L,48317L,48318L,48319L,48320L,48321L,48322L,48323L,48324L, 48325L,48326L,48327L,48328L,48329L,48330L,48331L,48332L,48333L,48334L, 48335L,48336L,48337L,48338L,48339L,48340L,48341L,48342L,48343L,48344L, 48345L,48346L,48347L,48348L,48349L,48350L,48351L,48352L,48353L,48354L, 48355L,48356L,48357L,48358L,48359L,48360L,48361L,48362L,48363L,48364L, 48365L,48366L,48367L,48368L,48369L,48370L,48371L,48372L,48373L,48374L, 48375L,48376L,48377L,48378L,48379L,48380L,48381L,48382L,48383L,48384L, 48385L,48386L,48387L,48388L,48389L,48390L,48391L,48392L,48393L,48394L, 48395L,48396L,48397L,48398L,48399L,48400L,48401L,48402L,48403L,48404L, 48405L,48406L,48407L,48408L,48409L,48410L,48411L,48412L,48413L,48414L, 48415L,48416L,48417L,48418L,48419L,48420L,48421L,48422L,48423L,48424L, 48425L,48426L,48427L,48428L,48429L,48430L,48431L,48432L,48433L,48434L, 48435L,48436L,48437L,48438L,48439L,48440L,48441L,48442L,48443L,48444L, 48445L,48446L,48447L,48448L,48449L,48450L,48451L,48452L,48453L,48454L, 48455L,48456L,48457L,48458L,48459L,48460L,48461L,48462L,48463L,48464L, 48465L,48466L,48467L,48468L,48469L,48470L,48471L,48472L,48473L,48474L, 48475L,48476L,48477L,48478L,48479L,48480L,48481L,48482L,48483L,48484L, 48485L,48486L,48487L,48488L,48489L,48490L,48491L,48492L,48493L,48494L, 48495L,48496L,48497L,48498L,48499L,48500L,48501L,48502L,48503L,48504L, 48505L,48506L,48507L,48508L,48509L,48510L,48511L,48512L,48513L,48514L, 48515L,48516L,48517L,48518L,48519L,48520L,48521L,48522L,48523L,48524L, 48525L,48526L,48527L,48528L,48529L,48530L,48531L,48532L,48533L,48534L, 48535L,48536L,48537L,48538L,48539L,48540L,48541L,48542L,48543L,48544L, 48545L,48546L,48547L,48548L,48549L,48550L,48551L,48552L,48553L,48554L, 48555L,48556L,48557L,48558L,48559L,48560L,48561L,48562L,48563L,48564L, 48565L,48566L,48567L,48568L,48569L,48570L,48571L,48572L,48573L,48574L, 48575L,48576L,48577L,48578L,48579L,48580L,48581L,48582L,48583L,48584L, 48585L,48586L,48587L,48588L,48589L,48590L,48591L,48592L,48593L,48594L, 48595L,48596L,48597L,48598L,48599L,48600L,48601L,48602L,48603L,48604L, 48605L,48606L,48607L,48608L,48609L,48610L,48611L,48612L,48613L,48614L, 48615L,48616L,48617L,48618L,48619L,48620L,48621L,48622L,48623L,48624L, 48625L,48626L,48627L,48628L,48629L,48630L,48631L,48632L,48633L,48634L, 48635L,48636L,48637L,48638L,48639L,48640L,48641L,48642L,48643L,48644L, 48645L,48646L,48647L,48648L,48649L,48650L,48651L,48652L,48653L,48654L, 48655L,48656L,48657L,48658L,48659L,48660L,48661L,48662L,48663L,48664L, 48665L,48666L,48667L,48668L,48669L,48670L,48671L,48672L,48673L,48674L, 48675L,48676L,48677L,48678L,48679L,48680L,48681L,48682L,48683L,48684L, 48685L,48686L,48687L,48688L,48689L,48690L,48691L,48692L,48693L,48694L, 48695L,48696L,48697L,48698L,48699L,48700L,48701L,48702L,48703L,48704L, 48705L,48706L,48707L,48708L,48709L,48710L,48711L,48712L,48713L,48714L, 48715L,48716L,48717L,48718L,48719L,48720L,48721L,48722L,48723L,48724L, 48725L,48726L,48727L,48728L,48729L,48730L,48731L,48732L,48733L,48734L, 48735L,48736L,48737L,48738L,48739L,48740L,48741L,48742L,48743L,48744L, 48745L,48746L,48747L,48748L,48749L,48750L,48751L,48752L,48753L,48754L, 48755L,48756L,48757L,48758L,48759L,48760L,48761L,48762L,48763L,48764L, 48765L,48766L,48767L,48768L,48769L,48770L,48771L,48772L,48773L,48774L, 48775L,48776L,48777L,48778L,48779L,48780L,48781L,48782L,48783L,48784L, 48785L,48786L,48787L,48788L,48789L,48790L,48791L,48792L,48793L,48794L, 48795L,48796L,48797L,48798L,48799L,48800L,48801L,48802L,48803L,48804L, 48805L,48806L,48807L,48808L,48809L,48810L,48811L,48812L,48813L,48814L, 48815L,48816L,48817L,48818L,48819L,48820L,48821L,48822L,48823L,48824L, 48825L,48826L,48827L,48828L,48829L,48830L,48831L,48832L,48833L,48834L, 48835L,48836L,48837L,48838L,48839L,48840L,48841L,48842L,48843L,48844L, 48845L,48846L,48847L,48848L,48849L,48850L,48851L,48852L,48853L,48854L, 48855L,48856L,48857L,48858L,48859L,48860L,48861L,48862L,48863L,48864L, 48865L,48866L,48867L,48868L,48869L,48870L,48871L,48872L,48873L,48874L, 48875L,48876L,48877L,48878L,48879L,48880L,48881L,48882L,48883L,48884L, 48885L,48886L,48887L,48888L,48889L,48890L,48891L,48892L,48893L,48894L, 48895L,48896L,48897L,48898L,48899L,48900L,48901L,48902L,48903L,48904L, 48905L,48906L,48907L,48908L,48909L,48910L,48911L,48912L,48913L,48914L, 48915L,48916L,48917L,48918L,48919L,48920L,48921L,48922L,48923L,48924L, 48925L,48926L,48927L,48928L,48929L,48930L,48931L,48932L,48933L,48934L, 48935L,48936L,48937L,48938L,48939L,48940L,48941L,48942L,48943L,48944L, 48945L,48946L,48947L,48948L,48949L,48950L,48951L,48952L,48953L,48954L, 48955L,48956L,48957L,48958L,48959L,48960L,48961L,48962L,48963L,48964L, 48965L,48966L,48967L,48968L,48969L,48970L,48971L,48972L,48973L,48974L, 48975L,48976L,48977L,48978L,48979L,48980L,48981L,48982L,48983L,48984L, 48985L,48986L,48987L,48988L,48989L,48990L,48991L,48992L,48993L,48994L, 48995L,48996L,48997L,48998L,48999L,49000L,49001L,49002L,49003L,49004L, 49005L,49006L,49007L,49008L,49009L,49010L,49011L,49012L,49013L,49014L, 49015L,49016L,49017L,49018L,49019L,49020L,49021L,49022L,49023L,49024L, 49025L,49026L,49027L,49028L,49029L,49030L,49031L,49032L,49033L,49034L, 49035L,49036L,49037L,49038L,49039L,49040L,49041L,49042L,49043L,49044L, 49045L,49046L,49047L,49048L,49049L,49050L,49051L,49052L,49053L,49054L, 49055L,49056L,49057L,49058L,49059L,49060L,49061L,49062L,49063L,49064L, 49065L,49066L,49067L,49068L,49069L,49070L,49071L,49072L,49073L,49074L, 49075L,49076L,49077L,49078L,49079L,49080L,49081L,49082L,49083L,49084L, 49085L,49086L,49087L,49088L,49089L,49090L,49091L,49092L,49093L,49094L, 49095L,49096L,49097L,49098L,49099L,49100L,49101L,49102L,49103L,49104L, 49105L,49106L,49107L,49108L,49109L,49110L,49111L,49112L,49113L,49114L, 49115L,49116L,49117L,49118L,49119L,49120L,49121L,49122L,49123L,49124L, 49125L,49126L,49127L,49128L,49129L,49130L,49131L,49132L,49133L,49134L, 49135L,49136L,49137L,49138L,49139L,49140L,49141L,49142L,49143L,49144L, 49145L,49146L,49147L,49148L,49149L,49150L,49151L,49152L,49153L,49154L, 49155L,49156L,49157L,49158L,49159L,49160L,49161L,49162L,49163L,49164L, 49165L,49166L,49167L,49168L,49169L,49170L,49171L,49172L,49173L,49174L, 49175L,49176L,49177L,49178L,49179L,49180L,49181L,49182L,49183L,49184L, 49185L,49186L,49187L,49188L,49189L,49190L,49191L,49192L,49193L,49194L, 49195L,49196L,49197L,49198L,49199L,49200L,49201L,49202L,49203L,49204L, 49205L,49206L,49207L,49208L,49209L,49210L,49211L,49212L,49213L,49214L, 49215L,49216L,49217L,49218L,49219L,49220L,49221L,49222L,49223L,49224L, 49225L,49226L,49227L,49228L,49229L,49230L,49231L,49232L,49233L,49234L, 49235L,49236L,49237L,49238L,49239L,49240L,49241L,49242L,49243L,49244L, 49245L,49246L,49247L,49248L,49249L,49250L,49251L,49252L,49253L,49254L, 49255L,49256L,49257L,49258L,49259L,49260L,49261L,49262L,49263L,49264L, 49265L,49266L,49267L,49268L,49269L,49270L,49271L,49272L,49273L,49274L, 49275L,49276L,49277L,49278L,49279L,49280L,49281L,49282L,49283L,49284L, 49285L,49286L,49287L,49288L,49289L,49290L,49291L,49292L,49293L,49294L, 49295L,49296L,49297L,49298L,49299L,49300L,49301L,49302L,49303L,49304L, 49305L,49306L,49307L,49308L,49309L,49310L,49311L,49312L,49313L,49314L, 49315L,49316L,49317L,49318L,49319L,49320L,49321L,49322L,49323L,49324L, 49325L,49326L,49327L,49328L,49329L,49330L,49331L,49332L,49333L,49334L, 49335L,49336L,49337L,49338L,49339L,49340L,49341L,49342L,49343L,49344L, 49345L,49346L,49347L,49348L,49349L,49350L,49351L,49352L,49353L,49354L, 49355L,49356L,49357L,49358L,49359L,49360L,49361L,49362L,49363L,49364L, 49365L,49366L,49367L,49368L,49369L,49370L,49371L,49372L,49373L,49374L, 49375L,49376L,49377L,49378L,49379L,49380L,49381L,49382L,49383L,49384L, 49385L,49386L,49387L,49388L,49389L,49390L,49391L,49392L,49393L,49394L, 49395L,49396L,49397L,49398L,49399L,49400L,49401L,49402L,49403L,49404L, 49405L,49406L,49407L,49408L,49409L,49410L,49411L,49412L,49413L,49414L, 49415L,49416L,49417L,49418L,49419L,49420L,49421L,49422L,49423L,49424L, 49425L,49426L,49427L,49428L,49429L,49430L,49431L,49432L,49433L,49434L, 49435L,49436L,49437L,49438L,49439L,49440L,49441L,49442L,49443L,49444L, 49445L,49446L,49447L,49448L,49449L,49450L,49451L,49452L,49453L,49454L, 49455L,49456L,49457L,49458L,49459L,49460L,49461L,49462L,49463L,49464L, 49465L,49466L,49467L,49468L,49469L,49470L,49471L,49472L,49473L,49474L, 49475L,49476L,49477L,49478L,49479L,49480L,49481L,49482L,49483L,49484L, 49485L,49486L,49487L,49488L,49489L,49490L,49491L,49492L,49493L,49494L, 49495L,49496L,49497L,49498L,49499L,49500L,49501L,49502L,49503L,49504L, 49505L,49506L,49507L,49508L,49509L,49510L,49511L,49512L,49513L,49514L, 49515L,49516L,49517L,49518L,49519L,49520L,49521L,49522L,49523L,49524L, 49525L,49526L,49527L,49528L,49529L,49530L,49531L,49532L,49533L,49534L, 49535L,49536L,49537L,49538L,49539L,49540L,49541L,49542L,49543L,49544L, 49545L,49546L,49547L,49548L,49549L,49550L,49551L,49552L,49553L,49554L, 49555L,49556L,49557L,49558L,49559L,49560L,49561L,49562L,49563L,49564L, 49565L,49566L,49567L,49568L,49569L,49570L,49571L,49572L,49573L,49574L, 49575L,49576L,49577L,49578L,49579L,49580L,49581L,49582L,49583L,49584L, 49585L,49586L,49587L,49588L,49589L,49590L,49591L,49592L,49593L,49594L, 49595L,49596L,49597L,49598L,49599L,49600L,49601L,49602L,49603L,49604L, 49605L,49606L,49607L,49608L,49609L,49610L,49611L,49612L,49613L,49614L, 49615L,49616L,49617L,49618L,49619L,49620L,49621L,49622L,49623L,49624L, 49625L,49626L,49627L,49628L,49629L,49630L,49631L,49632L,49633L,49634L, 49635L,49636L,49637L,49638L,49639L,49640L,49641L,49642L,49643L,49644L, 49645L,49646L,49647L,49648L,49649L,49650L,49651L,49652L,49653L,49654L, 49655L,49656L,49657L,49658L,49659L,49660L,49661L,49662L,49663L,49664L, 49665L,49666L,49667L,49668L,49669L,49670L,49671L,49672L,49673L,49674L, 49675L,49676L,49677L,49678L,49679L,49680L,49681L,49682L,49683L,49684L, 49685L,49686L,49687L,49688L,49689L,49690L,49691L,49692L,49693L,49694L, 49695L,49696L,49697L,49698L,49699L,49700L,49701L,49702L,49703L,49704L, 49705L,49706L,49707L,49708L,49709L,49710L,49711L,49712L,49713L,49714L, 49715L,49716L,49717L,49718L,49719L,49720L,49721L,49722L,49723L,49724L, 49725L,49726L,49727L,49728L,49729L,49730L,49731L,49732L,49733L,49734L, 49735L,49736L,49737L,49738L,49739L,49740L,49741L,49742L,49743L,49744L, 49745L,49746L,49747L,49748L,49749L,49750L,49751L,49752L,49753L,49754L, 49755L,49756L,49757L,49758L,49759L,49760L,49761L,49762L,49763L,49764L, 49765L,49766L,49767L,49768L,49769L,49770L,49771L,49772L,49773L,49774L, 49775L,49776L,49777L,49778L,49779L,49780L,49781L,49782L,49783L,49784L, 49785L,49786L,49787L,49788L,49789L,49790L,49791L,49792L,49793L,49794L, 49795L,49796L,49797L,49798L,49799L,49800L,49801L,49802L,49803L,49804L, 49805L,49806L,49807L,49808L,49809L,49810L,49811L,49812L,49813L,49814L, 49815L,49816L,49817L,49818L,49819L,49820L,49821L,49822L,49823L,49824L, 49825L,49826L,49827L,49828L,49829L,49830L,49831L,49832L,49833L,49834L, 49835L,49836L,49837L,49838L,49839L,49840L,49841L,49842L,49843L,49844L, 49845L,49846L,49847L,49848L,49849L,49850L,49851L,49852L,49853L,49854L, 49855L,49856L,49857L,49858L,49859L,49860L,49861L,49862L,49863L,49864L, 49865L,49866L,49867L,49868L,49869L,49870L,49871L,49872L,49873L,49874L, 49875L,49876L,49877L,49878L,49879L,49880L,49881L,49882L,49883L,49884L, 49885L,49886L,49887L,49888L,49889L,49890L,49891L,49892L,49893L,49894L, 49895L,49896L,49897L,49898L,49899L,49900L,49901L,49902L,49903L,49904L, 49905L,49906L,49907L,49908L,49909L,49910L,49911L,49912L,49913L,49914L, 49915L,49916L,49917L,49918L,49919L,49920L,49921L,49922L,49923L,49924L, 49925L,49926L,49927L,49928L,49929L,49930L,49931L,49932L,49933L,49934L, 49935L,49936L,49937L,49938L,49939L,49940L,49941L,49942L,49943L,49944L, 49945L,49946L,49947L,49948L,49949L,49950L,49951L,49952L,49953L,49954L, 49955L,49956L,49957L,49958L,49959L,49960L,49961L,49962L,49963L,49964L, 49965L,49966L,49967L,49968L,49969L,49970L,49971L,49972L,49973L,49974L, 49975L,49976L,49977L,49978L,49979L,49980L,49981L,49982L,49983L,49984L, 49985L,49986L,49987L,49988L,49989L,49990L,49991L,49992L,49993L,49994L, 49995L,49996L,49997L,49998L,49999L,50000L,50001L,50002L,50003L,50004L, 50005L,50006L,50007L,50008L,50009L,50010L,50011L,50012L,50013L,50014L, 50015L,50016L,50017L,50018L,50019L,50020L,50021L,50022L,50023L,50024L, 50025L,50026L,50027L,50028L,50029L,50030L,50031L,50032L,50033L,50034L, 50035L,50036L,50037L,50038L,50039L,50040L,50041L,50042L,50043L,50044L, 50045L,50046L,50047L,50048L,50049L,50050L,50051L,50052L,50053L,50054L, 50055L,50056L,50057L,50058L,50059L,50060L,50061L,50062L,50063L,50064L, 50065L,50066L,50067L,50068L,50069L,50070L,50071L,50072L,50073L,50074L, 50075L,50076L,50077L,50078L,50079L,50080L,50081L,50082L,50083L,50084L, 50085L,50086L,50087L,50088L,50089L,50090L,50091L,50092L,50093L,50094L, 50095L,50096L,50097L,50098L,50099L,50100L,50101L,50102L,50103L,50104L, 50105L,50106L,50107L,50108L,50109L,50110L,50111L,50112L,50113L,50114L, 50115L,50116L,50117L,50118L,50119L,50120L,50121L,50122L,50123L,50124L, 50125L,50126L,50127L,50128L,50129L,50130L,50131L,50132L,50133L,50134L, 50135L,50136L,50137L,50138L,50139L,50140L,50141L,50142L,50143L,50144L, 50145L,50146L,50147L,50148L,50149L,50150L,50151L,50152L,50153L,50154L, 50155L,50156L,50157L,50158L,50159L,50160L,50161L,50162L,50163L,50164L, 50165L,50166L,50167L,50168L,50169L,50170L,50171L,50172L,50173L,50174L, 50175L,50176L,50177L,50178L,50179L,50180L,50181L,50182L,50183L,50184L, 50185L,50186L,50187L,50188L,50189L,50190L,50191L,50192L,50193L,50194L, 50195L,50196L,50197L,50198L,50199L,50200L,50201L,50202L,50203L,50204L, 50205L,50206L,50207L,50208L,50209L,50210L,50211L,50212L,50213L,50214L, 50215L,50216L,50217L,50218L,50219L,50220L,50221L,50222L,50223L,50224L, 50225L,50226L,50227L,50228L,50229L,50230L,50231L,50232L,50233L,50234L, 50235L,50236L,50237L,50238L,50239L,50240L,50241L,50242L,50243L,50244L, 50245L,50246L,50247L,50248L,50249L,50250L,50251L,50252L,50253L,50254L, 50255L,50256L,50257L,50258L,50259L,50260L,50261L,50262L,50263L,50264L, 50265L,50266L,50267L,50268L,50269L,50270L,50271L,50272L,50273L,50274L, 50275L,50276L,50277L,50278L,50279L,50280L,50281L,50282L,50283L,50284L, 50285L,50286L,50287L,50288L,50289L,50290L,50291L,50292L,50293L,50294L, 50295L,50296L,50297L,50298L,50299L,50300L,50301L,50302L,50303L,50304L, 50305L,50306L,50307L,50308L,50309L,50310L,50311L,50312L,50313L,50314L, 50315L,50316L,50317L,50318L,50319L,50320L,50321L,50322L,50323L,50324L, 50325L,50326L,50327L,50328L,50329L,50330L,50331L,50332L,50333L,50334L, 50335L,50336L,50337L,50338L,50339L,50340L,50341L,50342L,50343L,50344L, 50345L,50346L,50347L,50348L,50349L,50350L,50351L,50352L,50353L,50354L, 50355L,50356L,50357L,50358L,50359L,50360L,50361L,50362L,50363L,50364L, 50365L,50366L,50367L,50368L,50369L,50370L,50371L,50372L,50373L,50374L, 50375L,50376L,50377L,50378L,50379L,50380L,50381L,50382L,50383L,50384L, 50385L,50386L,50387L,50388L,50389L,50390L,50391L,50392L,50393L,50394L, 50395L,50396L,50397L,50398L,50399L,50400L,50401L,50402L,50403L,50404L, 50405L,50406L,50407L,50408L,50409L,50410L,50411L,50412L,50413L,50414L, 50415L,50416L,50417L,50418L,50419L,50420L,50421L,50422L,50423L,50424L, 50425L,50426L,50427L,50428L,50429L,50430L,50431L,50432L,50433L,50434L, 50435L,50436L,50437L,50438L,50439L,50440L,50441L,50442L,50443L,50444L, 50445L,50446L,50447L,50448L,50449L,50450L,50451L,50452L,50453L,50454L, 50455L,50456L,50457L,50458L,50459L,50460L,50461L,50462L,50463L,50464L, 50465L,50466L,50467L,50468L,50469L,50470L,50471L,50472L,50473L,50474L, 50475L,50476L,50477L,50478L,50479L,50480L,50481L,50482L,50483L,50484L, 50485L,50486L,50487L,50488L,50489L,50490L,50491L,50492L,50493L,50494L, 50495L,50496L,50497L,50498L,50499L,50500L,50501L,50502L,50503L,50504L, 50505L,50506L,50507L,50508L,50509L,50510L,50511L,50512L,50513L,50514L, 50515L,50516L,50517L,50518L,50519L,50520L,50521L,50522L,50523L,50524L, 50525L,50526L,50527L,50528L,50529L,50530L,50531L,50532L,50533L,50534L, 50535L,50536L,50537L,50538L,50539L,50540L,50541L,50542L,50543L,50544L, 50545L,50546L,50547L,50548L,50549L,50550L,50551L,50552L,50553L,50554L, 50555L,50556L,50557L,50558L,50559L,50560L,50561L,50562L,50563L,50564L, 50565L,50566L,50567L,50568L,50569L,50570L,50571L,50572L,50573L,50574L, 50575L,50576L,50577L,50578L,50579L,50580L,50581L,50582L,50583L,50584L, 50585L,50586L,50587L,50588L,50589L,50590L,50591L,50592L,50593L,50594L, 50595L,50596L,50597L,50598L,50599L,50600L,50601L,50602L,50603L,50604L, 50605L,50606L,50607L,50608L,50609L,50610L,50611L,50612L,50613L,50614L, 50615L,50616L,50617L,50618L,50619L,50620L,50621L,50622L,50623L,50624L, 50625L,50626L,50627L,50628L,50629L,50630L,50631L,50632L,50633L,50634L, 50635L,50636L,50637L,50638L,50639L,50640L,50641L,50642L,50643L,50644L, 50645L,50646L,50647L,50648L,50649L,50650L,50651L,50652L,50653L,50654L, 50655L,50656L,50657L,50658L,50659L,50660L,50661L,50662L,50663L,50664L, 50665L,50666L,50667L,50668L,50669L,50670L,50671L,50672L,50673L,50674L, 50675L,50676L,50677L,50678L,50679L,50680L,50681L,50682L,50683L,50684L, 50685L,50686L,50687L,50688L,50689L,50690L,50691L,50692L,50693L,50694L, 50695L,50696L,50697L,50698L,50699L,50700L,50701L,50702L,50703L,50704L, 50705L,50706L,50707L,50708L,50709L,50710L,50711L,50712L,50713L,50714L, 50715L,50716L,50717L,50718L,50719L,50720L,50721L,50722L,50723L,50724L, 50725L,50726L,50727L,50728L,50729L,50730L,50731L,50732L,50733L,50734L, 50735L,50736L,50737L,50738L,50739L,50740L,50741L,50742L,50743L,50744L, 50745L,50746L,50747L,50748L,50749L,50750L,50751L,50752L,50753L,50754L, 50755L,50756L,50757L,50758L,50759L,50760L,50761L,50762L,50763L,50764L, 50765L,50766L,50767L,50768L,50769L,50770L,50771L,50772L,50773L,50774L, 50775L,50776L,50777L,50778L,50779L,50780L,50781L,50782L,50783L,50784L, 50785L,50786L,50787L,50788L,50789L,50790L,50791L,50792L,50793L,50794L, 50795L,50796L,50797L,50798L,50799L,50800L,50801L,50802L,50803L,50804L, 50805L,50806L,50807L,50808L,50809L,50810L,50811L,50812L,50813L,50814L, 50815L,50816L,50817L,50818L,50819L,50820L,50821L,50822L,50823L,50824L, 50825L,50826L,50827L,50828L,50829L,50830L,50831L,50832L,50833L,50834L, 50835L,50836L,50837L,50838L,50839L,50840L,50841L,50842L,50843L,50844L, 50845L,50846L,50847L,50848L,50849L,50850L,50851L,50852L,50853L,50854L, 50855L,50856L,50857L,50858L,50859L,50860L,50861L,50862L,50863L,50864L, 50865L,50866L,50867L,50868L,50869L,50870L,50871L,50872L,50873L,50874L, 50875L,50876L,50877L,50878L,50879L,50880L,50881L,50882L,50883L,50884L, 50885L,50886L,50887L,50888L,50889L,50890L,50891L,50892L,50893L,50894L, 50895L,50896L,50897L,50898L,50899L,50900L,50901L,50902L,50903L,50904L, 50905L,50906L,50907L,50908L,50909L,50910L,50911L,50912L,50913L,50914L, 50915L,50916L,50917L,50918L,50919L,50920L,50921L,50922L,50923L,50924L, 50925L,50926L,50927L,50928L,50929L,50930L,50931L,50932L,50933L,50934L, 50935L,50936L,50937L,50938L,50939L,50940L,50941L,50942L,50943L,50944L, 50945L,50946L,50947L,50948L,50949L,50950L,50951L,50952L,50953L,50954L, 50955L,50956L,50957L,50958L,50959L,50960L,50961L,50962L,50963L,50964L, 50965L,50966L,50967L,50968L,50969L,50970L,50971L,50972L,50973L,50974L, 50975L,50976L,50977L,50978L,50979L,50980L,50981L,50982L,50983L,50984L, 50985L,50986L,50987L,50988L,50989L,50990L,50991L,50992L,50993L,50994L, 50995L,50996L,50997L,50998L,50999L,51000L,51001L,51002L,51003L,51004L, 51005L,51006L,51007L,51008L,51009L,51010L,51011L,51012L,51013L,51014L, 51015L,51016L,51017L,51018L,51019L,51020L,51021L,51022L,51023L,51024L, 51025L,51026L,51027L,51028L,51029L,51030L,51031L,51032L,51033L,51034L, 51035L,51036L,51037L,51038L,51039L,51040L,51041L,51042L,51043L,51044L, 51045L,51046L,51047L,51048L,51049L,51050L,51051L,51052L,51053L,51054L, 51055L,51056L,51057L,51058L,51059L,51060L,51061L,51062L,51063L,51064L, 51065L,51066L,51067L,51068L,51069L,51070L,51071L,51072L,51073L,51074L, 51075L,51076L,51077L,51078L,51079L,51080L,51081L,51082L,51083L,51084L, 51085L,51086L,51087L,51088L,51089L,51090L,51091L,51092L,51093L,51094L, 51095L,51096L,51097L,51098L,51099L,51100L,51101L,51102L,51103L,51104L, 51105L,51106L,51107L,51108L,51109L,51110L,51111L,51112L,51113L,51114L, 51115L,51116L,51117L,51118L,51119L,51120L,51121L,51122L,51123L,51124L, 51125L,51126L,51127L,51128L,51129L,51130L,51131L,51132L,51133L,51134L, 51135L,51136L,51137L,51138L,51139L,51140L,51141L,51142L,51143L,51144L, 51145L,51146L,51147L,51148L,51149L,51150L,51151L,51152L,51153L,51154L, 51155L,51156L,51157L,51158L,51159L,51160L,51161L,51162L,51163L,51164L, 51165L,51166L,51167L,51168L,51169L,51170L,51171L,51172L,51173L,51174L, 51175L,51176L,51177L,51178L,51179L,51180L,51181L,51182L,51183L,51184L, 51185L,51186L,51187L,51188L,51189L,51190L,51191L,51192L,51193L,51194L, 51195L,51196L,51197L,51198L,51199L,51200L,51201L,51202L,51203L,51204L, 51205L,51206L,51207L,51208L,51209L,51210L,51211L,51212L,51213L,51214L, 51215L,51216L,51217L,51218L,51219L,51220L,51221L,51222L,51223L,51224L, 51225L,51226L,51227L,51228L,51229L,51230L,51231L,51232L,51233L,51234L, 51235L,51236L,51237L,51238L,51239L,51240L,51241L,51242L,51243L,51244L, 51245L,51246L,51247L,51248L,51249L,51250L,51251L,51252L,51253L,51254L, 51255L,51256L,51257L,51258L,51259L,51260L,51261L,51262L,51263L,51264L, 51265L,51266L,51267L,51268L,51269L,51270L,51271L,51272L,51273L,51274L, 51275L,51276L,51277L,51278L,51279L,51280L,51281L,51282L,51283L,51284L, 51285L,51286L,51287L,51288L,51289L,51290L,51291L,51292L,51293L,51294L, 51295L,51296L,51297L,51298L,51299L,51300L,51301L,51302L,51303L,51304L, 51305L,51306L,51307L,51308L,51309L,51310L,51311L,51312L,51313L,51314L, 51315L,51316L,51317L,51318L,51319L,51320L,51321L,51322L,51323L,51324L, 51325L,51326L,51327L,51328L,51329L,51330L,51331L,51332L,51333L,51334L, 51335L,51336L,51337L,51338L,51339L,51340L,51341L,51342L,51343L,51344L, 51345L,51346L,51347L,51348L,51349L,51350L,51351L,51352L,51353L,51354L, 51355L,51356L,51357L,51358L,51359L,51360L,51361L,51362L,51363L,51364L, 51365L,51366L,51367L,51368L,51369L,51370L,51371L,51372L,51373L,51374L, 51375L,51376L,51377L,51378L,51379L,51380L,51381L,51382L,51383L,51384L, 51385L,51386L,51387L,51388L,51389L,51390L,51391L,51392L,51393L,51394L, 51395L,51396L,51397L,51398L,51399L,51400L,51401L,51402L,51403L,51404L, 51405L,51406L,51407L,51408L,51409L,51410L,51411L,51412L,51413L,51414L, 51415L,51416L,51417L,51418L,51419L,51420L,51421L,51422L,51423L,51424L, 51425L,51426L,51427L,51428L,51429L,51430L,51431L,51432L,51433L,51434L, 51435L,51436L,51437L,51438L,51439L,51440L,51441L,51442L,51443L,51444L, 51445L,51446L,51447L,51448L,51449L,51450L,51451L,51452L,51453L,51454L, 51455L,51456L,51457L,51458L,51459L,51460L,51461L,51462L,51463L,51464L, 51465L,51466L,51467L,51468L,51469L,51470L,51471L,51472L,51473L,51474L, 51475L,51476L,51477L,51478L,51479L,51480L,51481L,51482L,51483L,51484L, 51485L,51486L,51487L,51488L,51489L,51490L,51491L,51492L,51493L,51494L, 51495L,51496L,51497L,51498L,51499L,51500L,51501L,51502L,51503L,51504L, 51505L,51506L,51507L,51508L,51509L,51510L,51511L,51512L,51513L,51514L, 51515L,51516L,51517L,51518L,51519L,51520L,51521L,51522L,51523L,51524L, 51525L,51526L,51527L,51528L,51529L,51530L,51531L,51532L,51533L,51534L, 51535L,51536L,51537L,51538L,51539L,51540L,51541L,51542L,51543L,51544L, 51545L,51546L,51547L,51548L,51549L,51550L,51551L,51552L,51553L,51554L, 51555L,51556L,51557L,51558L,51559L,51560L,51561L,51562L,51563L,51564L, 51565L,51566L,51567L,51568L,51569L,51570L,51571L,51572L,51573L,51574L, 51575L,51576L,51577L,51578L,51579L,51580L,51581L,51582L,51583L,51584L, 51585L,51586L,51587L,51588L,51589L,51590L,51591L,51592L,51593L,51594L, 51595L,51596L,51597L,51598L,51599L,51600L,51601L,51602L,51603L,51604L, 51605L,51606L,51607L,51608L,51609L,51610L,51611L,51612L,51613L,51614L, 51615L,51616L,51617L,51618L,51619L,51620L,51621L,51622L,51623L,51624L, 51625L,51626L,51627L,51628L,51629L,51630L,51631L,51632L,51633L,51634L, 51635L,51636L,51637L,51638L,51639L,51640L,51641L,51642L,51643L,51644L, 51645L,51646L,51647L,51648L,51649L,51650L,51651L,51652L,51653L,51654L, 51655L,51656L,51657L,51658L,51659L,51660L,51661L,51662L,51663L,51664L, 51665L,51666L,51667L,51668L,51669L,51670L,51671L,51672L,51673L,51674L, 51675L,51676L,51677L,51678L,51679L,51680L,51681L,51682L,51683L,51684L, 51685L,51686L,51687L,51688L,51689L,51690L,51691L,51692L,51693L,51694L, 51695L,51696L,51697L,51698L,51699L,51700L,51701L,51702L,51703L,51704L, 51705L,51706L,51707L,51708L,51709L,51710L,51711L,51712L,51713L,51714L, 51715L,51716L,51717L,51718L,51719L,51720L,51721L,51722L,51723L,51724L, 51725L,51726L,51727L,51728L,51729L,51730L,51731L,51732L,51733L,51734L, 51735L,51736L,51737L,51738L,51739L,51740L,51741L,51742L,51743L,51744L, 51745L,51746L,51747L,51748L,51749L,51750L,51751L,51752L,51753L,51754L, 51755L,51756L,51757L,51758L,51759L,51760L,51761L,51762L,51763L,51764L, 51765L,51766L,51767L,51768L,51769L,51770L,51771L,51772L,51773L,51774L, 51775L,51776L,51777L,51778L,51779L,51780L,51781L,51782L,51783L,51784L, 51785L,51786L,51787L,51788L,51789L,51790L,51791L,51792L,51793L,51794L, 51795L,51796L,51797L,51798L,51799L,51800L,51801L,51802L,51803L,51804L, 51805L,51806L,51807L,51808L,51809L,51810L,51811L,51812L,51813L,51814L, 51815L,51816L,51817L,51818L,51819L,51820L,51821L,51822L,51823L,51824L, 51825L,51826L,51827L,51828L,51829L,51830L,51831L,51832L,51833L,51834L, 51835L,51836L,51837L,51838L,51839L,51840L,51841L,51842L,51843L,51844L, 51845L,51846L,51847L,51848L,51849L,51850L,51851L,51852L,51853L,51854L, 51855L,51856L,51857L,51858L,51859L,51860L,51861L,51862L,51863L,51864L, 51865L,51866L,51867L,51868L,51869L,51870L,51871L,51872L,51873L,51874L, 51875L,51876L,51877L,51878L,51879L,51880L,51881L,51882L,51883L,51884L, 51885L,51886L,51887L,51888L,51889L,51890L,51891L,51892L,51893L,51894L, 51895L,51896L,51897L,51898L,51899L,51900L,51901L,51902L,51903L,51904L, 51905L,51906L,51907L,51908L,51909L,51910L,51911L,51912L,51913L,51914L, 51915L,51916L,51917L,51918L,51919L,51920L,51921L,51922L,51923L,51924L, 51925L,51926L,51927L,51928L,51929L,51930L,51931L,51932L,51933L,51934L, 51935L,51936L,51937L,51938L,51939L,51940L,51941L,51942L,51943L,51944L, 51945L,51946L,51947L,51948L,51949L,51950L,51951L,51952L,51953L,51954L, 51955L,51956L,51957L,51958L,51959L,51960L,51961L,51962L,51963L,51964L, 51965L,51966L,51967L,51968L,51969L,51970L,51971L,51972L,51973L,51974L, 51975L,51976L,51977L,51978L,51979L,51980L,51981L,51982L,51983L,51984L, 51985L,51986L,51987L,51988L,51989L,51990L,51991L,51992L,51993L,51994L, 51995L,51996L,51997L,51998L,51999L,52000L,52001L,52002L,52003L,52004L, 52005L,52006L,52007L,52008L,52009L,52010L,52011L,52012L,52013L,52014L, 52015L,52016L,52017L,52018L,52019L,52020L,52021L,52022L,52023L,52024L, 52025L,52026L,52027L,52028L,52029L,52030L,52031L,52032L,52033L,52034L, 52035L,52036L,52037L,52038L,52039L,52040L,52041L,52042L,52043L,52044L, 52045L,52046L,52047L,52048L,52049L,52050L,52051L,52052L,52053L,52054L, 52055L,52056L,52057L,52058L,52059L,52060L,52061L,52062L,52063L,52064L, 52065L,52066L,52067L,52068L,52069L,52070L,52071L,52072L,52073L,52074L, 52075L,52076L,52077L,52078L,52079L,52080L,52081L,52082L,52083L,52084L, 52085L,52086L,52087L,52088L,52089L,52090L,52091L,52092L,52093L,52094L, 52095L,52096L,52097L,52098L,52099L,52100L,52101L,52102L,52103L,52104L, 52105L,52106L,52107L,52108L,52109L,52110L,52111L,52112L,52113L,52114L, 52115L,52116L,52117L,52118L,52119L,52120L,52121L,52122L,52123L,52124L, 52125L,52126L,52127L,52128L,52129L,52130L,52131L,52132L,52133L,52134L, 52135L,52136L,52137L,52138L,52139L,52140L,52141L,52142L,52143L,52144L, 52145L,52146L,52147L,52148L,52149L,52150L,52151L,52152L,52153L,52154L, 52155L,52156L,52157L,52158L,52159L,52160L,52161L,52162L,52163L,52164L, 52165L,52166L,52167L,52168L,52169L,52170L,52171L,52172L,52173L,52174L, 52175L,52176L,52177L,52178L,52179L,52180L,52181L,52182L,52183L,52184L, 52185L,52186L,52187L,52188L,52189L,52190L,52191L,52192L,52193L,52194L, 52195L,52196L,52197L,52198L,52199L,52200L,52201L,52202L,52203L,52204L, 52205L,52206L,52207L,52208L,52209L,52210L,52211L,52212L,52213L,52214L, 52215L,52216L,52217L,52218L,52219L,52220L,52221L,52222L,52223L,52224L, 52225L,52226L,52227L,52228L,52229L,52230L,52231L,52232L,52233L,52234L, 52235L,52236L,52237L,52238L,52239L,52240L,52241L,52242L,52243L,52244L, 52245L,52246L,52247L,52248L,52249L,52250L,52251L,52252L,52253L,52254L, 52255L,52256L,52257L,52258L,52259L,52260L,52261L,52262L,52263L,52264L, 52265L,52266L,52267L,52268L,52269L,52270L,52271L,52272L,52273L,52274L, 52275L,52276L,52277L,52278L,52279L,52280L,52281L,52282L,52283L,52284L, 52285L,52286L,52287L,52288L,52289L,52290L,52291L,52292L,52293L,52294L, 52295L,52296L,52297L,52298L,52299L,52300L,52301L,52302L,52303L,52304L, 52305L,52306L,52307L,52308L,52309L,52310L,52311L,52312L,52313L,52314L, 52315L,52316L,52317L,52318L,52319L,52320L,52321L,52322L,52323L,52324L, 52325L,52326L,52327L,52328L,52329L,52330L,52331L,52332L,52333L,52334L, 52335L,52336L,52337L,52338L,52339L,52340L,52341L,52342L,52343L,52344L, 52345L,52346L,52347L,52348L,52349L,52350L,52351L,52352L,52353L,52354L, 52355L,52356L,52357L,52358L,52359L,52360L,52361L,52362L,52363L,52364L, 52365L,52366L,52367L,52368L,52369L,52370L,52371L,52372L,52373L,52374L, 52375L,52376L,52377L,52378L,52379L,52380L,52381L,52382L,52383L,52384L, 52385L,52386L,52387L,52388L,52389L,52390L,52391L,52392L,52393L,52394L, 52395L,52396L,52397L,52398L,52399L,52400L,52401L,52402L,52403L,52404L, 52405L,52406L,52407L,52408L,52409L,52410L,52411L,52412L,52413L,52414L, 52415L,52416L,52417L,52418L,52419L,52420L,52421L,52422L,52423L,52424L, 52425L,52426L,52427L,52428L,52429L,52430L,52431L,52432L,52433L,52434L, 52435L,52436L,52437L,52438L,52439L,52440L,52441L,52442L,52443L,52444L, 52445L,52446L,52447L,52448L,52449L,52450L,52451L,52452L,52453L,52454L, 52455L,52456L,52457L,52458L,52459L,52460L,52461L,52462L,52463L,52464L, 52465L,52466L,52467L,52468L,52469L,52470L,52471L,52472L,52473L,52474L, 52475L,52476L,52477L,52478L,52479L,52480L,52481L,52482L,52483L,52484L, 52485L,52486L,52487L,52488L,52489L,52490L,52491L,52492L,52493L,52494L, 52495L,52496L,52497L,52498L,52499L,52500L,52501L,52502L,52503L,52504L, 52505L,52506L,52507L,52508L,52509L,52510L,52511L,52512L,52513L,52514L, 52515L,52516L,52517L,52518L,52519L,52520L,52521L,52522L,52523L,52524L, 52525L,52526L,52527L,52528L,52529L,52530L,52531L,52532L,52533L,52534L, 52535L,52536L,52537L,52538L,52539L,52540L,52541L,52542L,52543L,52544L, 52545L,52546L,52547L,52548L,52549L,52550L,52551L,52552L,52553L,52554L, 52555L,52556L,52557L,52558L,52559L,52560L,52561L,52562L,52563L,52564L, 52565L,52566L,52567L,52568L,52569L,52570L,52571L,52572L,52573L,52574L, 52575L,52576L,52577L,52578L,52579L,52580L,52581L,52582L,52583L,52584L, 52585L,52586L,52587L,52588L,52589L,52590L,52591L,52592L,52593L,52594L, 52595L,52596L,52597L,52598L,52599L,52600L,52601L,52602L,52603L,52604L, 52605L,52606L,52607L,52608L,52609L,52610L,52611L,52612L,52613L,52614L, 52615L,52616L,52617L,52618L,52619L,52620L,52621L,52622L,52623L,52624L, 52625L,52626L,52627L,52628L,52629L,52630L,52631L,52632L,52633L,52634L, 52635L,52636L,52637L,52638L,52639L,52640L,52641L,52642L,52643L,52644L, 52645L,52646L,52647L,52648L,52649L,52650L,52651L,52652L,52653L,52654L, 52655L,52656L,52657L,52658L,52659L,52660L,52661L,52662L,52663L,52664L, 52665L,52666L,52667L,52668L,52669L,52670L,52671L,52672L,52673L,52674L, 52675L,52676L,52677L,52678L,52679L,52680L,52681L,52682L,52683L,52684L, 52685L,52686L,52687L,52688L,52689L,52690L,52691L,52692L,52693L,52694L, 52695L,52696L,52697L,52698L,52699L,52700L,52701L,52702L,52703L,52704L, 52705L,52706L,52707L,52708L,52709L,52710L,52711L,52712L,52713L,52714L, 52715L,52716L,52717L,52718L,52719L,52720L,52721L,52722L,52723L,52724L, 52725L,52726L,52727L,52728L,52729L,52730L,52731L,52732L,52733L,52734L, 52735L,52736L,52737L,52738L,52739L,52740L,52741L,52742L,52743L,52744L, 52745L,52746L,52747L,52748L,52749L,52750L,52751L,52752L,52753L,52754L, 52755L,52756L,52757L,52758L,52759L,52760L,52761L,52762L,52763L,52764L, 52765L,52766L,52767L,52768L,52769L,52770L,52771L,52772L,52773L,52774L, 52775L,52776L,52777L,52778L,52779L,52780L,52781L,52782L,52783L,52784L, 52785L,52786L,52787L,52788L,52789L,52790L,52791L,52792L,52793L,52794L, 52795L,52796L,52797L,52798L,52799L,52800L,52801L,52802L,52803L,52804L, 52805L,52806L,52807L,52808L,52809L,52810L,52811L,52812L,52813L,52814L, 52815L,52816L,52817L,52818L,52819L,52820L,52821L,52822L,52823L,52824L, 52825L,52826L,52827L,52828L,52829L,52830L,52831L,52832L,52833L,52834L, 52835L,52836L,52837L,52838L,52839L,52840L,52841L,52842L,52843L,52844L, 52845L,52846L,52847L,52848L,52849L,52850L,52851L,52852L,52853L,52854L, 52855L,52856L,52857L,52858L,52859L,52860L,52861L,52862L,52863L,52864L, 52865L,52866L,52867L,52868L,52869L,52870L,52871L,52872L,52873L,52874L, 52875L,52876L,52877L,52878L,52879L,52880L,52881L,52882L,52883L,52884L, 52885L,52886L,52887L,52888L,52889L,52890L,52891L,52892L,52893L,52894L, 52895L,52896L,52897L,52898L,52899L,52900L,52901L,52902L,52903L,52904L, 52905L,52906L,52907L,52908L,52909L,52910L,52911L,52912L,52913L,52914L, 52915L,52916L,52917L,52918L,52919L,52920L,52921L,52922L,52923L,52924L, 52925L,52926L,52927L,52928L,52929L,52930L,52931L,52932L,52933L,52934L, 52935L,52936L,52937L,52938L,52939L,52940L,52941L,52942L,52943L,52944L, 52945L,52946L,52947L,52948L,52949L,52950L,52951L,52952L,52953L,52954L, 52955L,52956L,52957L,52958L,52959L,52960L,52961L,52962L,52963L,52964L, 52965L,52966L,52967L,52968L,52969L,52970L,52971L,52972L,52973L,52974L, 52975L,52976L,52977L,52978L,52979L,52980L,52981L,52982L,52983L,52984L, 52985L,52986L,52987L,52988L,52989L,52990L,52991L,52992L,52993L,52994L, 52995L,52996L,52997L,52998L,52999L,53000L,53001L,53002L,53003L,53004L, 53005L,53006L,53007L,53008L,53009L,53010L,53011L,53012L,53013L,53014L, 53015L,53016L,53017L,53018L,53019L,53020L,53021L,53022L,53023L,53024L, 53025L,53026L,53027L,53028L,53029L,53030L,53031L,53032L,53033L,53034L, 53035L,53036L,53037L,53038L,53039L,53040L,53041L,53042L,53043L,53044L, 53045L,53046L,53047L,53048L,53049L,53050L,53051L,53052L,53053L,53054L, 53055L,53056L,53057L,53058L,53059L,53060L,53061L,53062L,53063L,53064L, 53065L,53066L,53067L,53068L,53069L,53070L,53071L,53072L,53073L,53074L, 53075L,53076L,53077L,53078L,53079L,53080L,53081L,53082L,53083L,53084L, 53085L,53086L,53087L,53088L,53089L,53090L,53091L,53092L,53093L,53094L, 53095L,53096L,53097L,53098L,53099L,53100L,53101L,53102L,53103L,53104L, 53105L,53106L,53107L,53108L,53109L,53110L,53111L,53112L,53113L,53114L, 53115L,53116L,53117L,53118L,53119L,53120L,53121L,53122L,53123L,53124L, 53125L,53126L,53127L,53128L,53129L,53130L,53131L,53132L,53133L,53134L, 53135L,53136L,53137L,53138L,53139L,53140L,53141L,53142L,53143L,53144L, 53145L,53146L,53147L,53148L,53149L,53150L,53151L,53152L,53153L,53154L, 53155L,53156L,53157L,53158L,53159L,53160L,53161L,53162L,53163L,53164L, 53165L,53166L,53167L,53168L,53169L,53170L,53171L,53172L,53173L,53174L, 53175L,53176L,53177L,53178L,53179L,53180L,53181L,53182L,53183L,53184L, 53185L,53186L,53187L,53188L,53189L,53190L,53191L,53192L,53193L,53194L, 53195L,53196L,53197L,53198L,53199L,53200L,53201L,53202L,53203L,53204L, 53205L,53206L,53207L,53208L,53209L,53210L,53211L,53212L,53213L,53214L, 53215L,53216L,53217L,53218L,53219L,53220L,53221L,53222L,53223L,53224L, 53225L,53226L,53227L,53228L,53229L,53230L,53231L,53232L,53233L,53234L, 53235L,53236L,53237L,53238L,53239L,53240L,53241L,53242L,53243L,53244L, 53245L,53246L,53247L,53248L,53249L,53250L,53251L,53252L,53253L,53254L, 53255L,53256L,53257L,53258L,53259L,53260L,53261L,53262L,53263L,53264L, 53265L,53266L,53267L,53268L,53269L,53270L,53271L,53272L,53273L,53274L, 53275L,53276L,53277L,53278L,53279L,53280L,53281L,53282L,53283L,53284L, 53285L,53286L,53287L,53288L,53289L,53290L,53291L,53292L,53293L,53294L, 53295L,53296L,53297L,53298L,53299L,53300L,53301L,53302L,53303L,53304L, 53305L,53306L,53307L,53308L,53309L,53310L,53311L,53312L,53313L,53314L, 53315L,53316L,53317L,53318L,53319L,53320L,53321L,53322L,53323L,53324L, 53325L,53326L,53327L,53328L,53329L,53330L,53331L,53332L,53333L,53334L, 53335L,53336L,53337L,53338L,53339L,53340L,53341L,53342L,53343L,53344L, 53345L,53346L,53347L,53348L,53349L,53350L,53351L,53352L,53353L,53354L, 53355L,53356L,53357L,53358L,53359L,53360L,53361L,53362L,53363L,53364L, 53365L,53366L,53367L,53368L,53369L,53370L,53371L,53372L,53373L,53374L, 53375L,53376L,53377L,53378L,53379L,53380L,53381L,53382L,53383L,53384L, 53385L,53386L,53387L,53388L,53389L,53390L,53391L,53392L,53393L,53394L, 53395L,53396L,53397L,53398L,53399L,53400L,53401L,53402L,53403L,53404L, 53405L,53406L,53407L,53408L,53409L,53410L,53411L,53412L,53413L,53414L, 53415L,53416L,53417L,53418L,53419L,53420L,53421L,53422L,53423L,53424L, 53425L,53426L,53427L,53428L,53429L,53430L,53431L,53432L,53433L,53434L, 53435L,53436L,53437L,53438L,53439L,53440L,53441L,53442L,53443L,53444L, 53445L,53446L,53447L,53448L,53449L,53450L,53451L,53452L,53453L,53454L, 53455L,53456L,53457L,53458L,53459L,53460L,53461L,53462L,53463L,53464L, 53465L,53466L,53467L,53468L,53469L,53470L,53471L,53472L,53473L,53474L, 53475L,53476L,53477L,53478L,53479L,53480L,53481L,53482L,53483L,53484L, 53485L,53486L,53487L,53488L,53489L,53490L,53491L,53492L,53493L,53494L, 53495L,53496L,53497L,53498L,53499L,53500L,53501L,53502L,53503L,53504L, 53505L,53506L,53507L,53508L,53509L,53510L,53511L,53512L,53513L,53514L, 53515L,53516L,53517L,53518L,53519L,53520L,53521L,53522L,53523L,53524L, 53525L,53526L,53527L,53528L,53529L,53530L,53531L,53532L,53533L,53534L, 53535L,53536L,53537L,53538L,53539L,53540L,53541L,53542L,53543L,53544L, 53545L,53546L,53547L,53548L,53549L,53550L,53551L,53552L,53553L,53554L, 53555L,53556L,53557L,53558L,53559L,53560L,53561L,53562L,53563L,53564L, 53565L,53566L,53567L,53568L,53569L,53570L,53571L,53572L,53573L,53574L, 53575L,53576L,53577L,53578L,53579L,53580L,53581L,53582L,53583L,53584L, 53585L,53586L,53587L,53588L,53589L,53590L,53591L,53592L,53593L,53594L, 53595L,53596L,53597L,53598L,53599L,53600L,53601L,53602L,53603L,53604L, 53605L,53606L,53607L,53608L,53609L,53610L,53611L,53612L,53613L,53614L, 53615L,53616L,53617L,53618L,53619L,53620L,53621L,53622L,53623L,53624L, 53625L,53626L,53627L,53628L,53629L,53630L,53631L,53632L,53633L,53634L, 53635L,53636L,53637L,53638L,53639L,53640L,53641L,53642L,53643L,53644L, 53645L,53646L,53647L,53648L,53649L,53650L,53651L,53652L,53653L,53654L, 53655L,53656L,53657L,53658L,53659L,53660L,53661L,53662L,53663L,53664L, 53665L,53666L,53667L,53668L,53669L,53670L,53671L,53672L,53673L,53674L, 53675L,53676L,53677L,53678L,53679L,53680L,53681L,53682L,53683L,53684L, 53685L,53686L,53687L,53688L,53689L,53690L,53691L,53692L,53693L,53694L, 53695L,53696L,53697L,53698L,53699L,53700L,53701L,53702L,53703L,53704L, 53705L,53706L,53707L,53708L,53709L,53710L,53711L,53712L,53713L,53714L, 53715L,53716L,53717L,53718L,53719L,53720L,53721L,53722L,53723L,53724L, 53725L,53726L,53727L,53728L,53729L,53730L,53731L,53732L,53733L,53734L, 53735L,53736L,53737L,53738L,53739L,53740L,53741L,53742L,53743L,53744L, 53745L,53746L,53747L,53748L,53749L,53750L,53751L,53752L,53753L,53754L, 53755L,53756L,53757L,53758L,53759L,53760L,53761L,53762L,53763L,53764L, 53765L,53766L,53767L,53768L,53769L,53770L,53771L,53772L,53773L,53774L, 53775L,53776L,53777L,53778L,53779L,53780L,53781L,53782L,53783L,53784L, 53785L,53786L,53787L,53788L,53789L,53790L,53791L,53792L,53793L,53794L, 53795L,53796L,53797L,53798L,53799L,53800L,53801L,53802L,53803L,53804L, 53805L,53806L,53807L,53808L,53809L,53810L,53811L,53812L,53813L,53814L, 53815L,53816L,53817L,53818L,53819L,53820L,53821L,53822L,53823L,53824L, 53825L,53826L,53827L,53828L,53829L,53830L,53831L,53832L,53833L,53834L, 53835L,53836L,53837L,53838L,53839L,53840L,53841L,53842L,53843L,53844L, 53845L,53846L,53847L,53848L,53849L,53850L,53851L,53852L,53853L,53854L, 53855L,53856L,53857L,53858L,53859L,53860L,53861L,53862L,53863L,53864L, 53865L,53866L,53867L,53868L,53869L,53870L,53871L,53872L,53873L,53874L, 53875L,53876L,53877L,53878L,53879L,53880L,53881L,53882L,53883L,53884L, 53885L,53886L,53887L,53888L,53889L,53890L,53891L,53892L,53893L,53894L, 53895L,53896L,53897L,53898L,53899L,53900L,53901L,53902L,53903L,53904L, 53905L,53906L,53907L,53908L,53909L,53910L,53911L,53912L,53913L,53914L, 53915L,53916L,53917L,53918L,53919L,53920L,53921L,53922L,53923L,53924L, 53925L,53926L,53927L,53928L,53929L,53930L,53931L,53932L,53933L,53934L, 53935L,53936L,53937L,53938L,53939L,53940L,53941L,53942L,53943L,53944L, 53945L,53946L,53947L,53948L,53949L,53950L,53951L,53952L,53953L,53954L, 53955L,53956L,53957L,53958L,53959L,53960L,53961L,53962L,53963L,53964L, 53965L,53966L,53967L,53968L,53969L,53970L,53971L,53972L,53973L,53974L, 53975L,53976L,53977L,53978L,53979L,53980L,53981L,53982L,53983L,53984L, 53985L,53986L,53987L,53988L,53989L,53990L,53991L,53992L,53993L,53994L, 53995L,53996L,53997L,53998L,53999L,54000L,54001L,54002L,54003L,54004L, 54005L,54006L,54007L,54008L,54009L,54010L,54011L,54012L,54013L,54014L, 54015L,54016L,54017L,54018L,54019L,54020L,54021L,54022L,54023L,54024L, 54025L,54026L,54027L,54028L,54029L,54030L,54031L,54032L,54033L,54034L, 54035L,54036L,54037L,54038L,54039L,54040L,54041L,54042L,54043L,54044L, 54045L,54046L,54047L,54048L,54049L,54050L,54051L,54052L,54053L,54054L, 54055L,54056L,54057L,54058L,54059L,54060L,54061L,54062L,54063L,54064L, 54065L,54066L,54067L,54068L,54069L,54070L,54071L,54072L,54073L,54074L, 54075L,54076L,54077L,54078L,54079L,54080L,54081L,54082L,54083L,54084L, 54085L,54086L,54087L,54088L,54089L,54090L,54091L,54092L,54093L,54094L, 54095L,54096L,54097L,54098L,54099L,54100L,54101L,54102L,54103L,54104L, 54105L,54106L,54107L,54108L,54109L,54110L,54111L,54112L,54113L,54114L, 54115L,54116L,54117L,54118L,54119L,54120L,54121L,54122L,54123L,54124L, 54125L,54126L,54127L,54128L,54129L,54130L,54131L,54132L,54133L,54134L, 54135L,54136L,54137L,54138L,54139L,54140L,54141L,54142L,54143L,54144L, 54145L,54146L,54147L,54148L,54149L,54150L,54151L,54152L,54153L,54154L, 54155L,54156L,54157L,54158L,54159L,54160L,54161L,54162L,54163L,54164L, 54165L,54166L,54167L,54168L,54169L,54170L,54171L,54172L,54173L,54174L, 54175L,54176L,54177L,54178L,54179L,54180L,54181L,54182L,54183L,54184L, 54185L,54186L,54187L,54188L,54189L,54190L,54191L,54192L,54193L,54194L, 54195L,54196L,54197L,54198L,54199L,54200L,54201L,54202L,54203L,54204L, 54205L,54206L,54207L,54208L,54209L,54210L,54211L,54212L,54213L,54214L, 54215L,54216L,54217L,54218L,54219L,54220L,54221L,54222L,54223L,54224L, 54225L,54226L,54227L,54228L,54229L,54230L,54231L,54232L,54233L,54234L, 54235L,54236L,54237L,54238L,54239L,54240L,54241L,54242L,54243L,54244L, 54245L,54246L,54247L,54248L,54249L,54250L,54251L,54252L,54253L,54254L, 54255L,54256L,54257L,54258L,54259L,54260L,54261L,54262L,54263L,54264L, 54265L,54266L,54267L,54268L,54269L,54270L,54271L,54272L,54273L,54274L, 54275L,54276L,54277L,54278L,54279L,54280L,54281L,54282L,54283L,54284L, 54285L,54286L,54287L,54288L,54289L,54290L,54291L,54292L,54293L,54294L, 54295L,54296L,54297L,54298L,54299L,54300L,54301L,54302L,54303L,54304L, 54305L,54306L,54307L,54308L,54309L,54310L,54311L,54312L,54313L,54314L, 54315L,54316L,54317L,54318L,54319L,54320L,54321L,54322L,54323L,54324L, 54325L,54326L,54327L,54328L,54329L,54330L,54331L,54332L,54333L,54334L, 54335L,54336L,54337L,54338L,54339L,54340L,54341L,54342L,54343L,54344L, 54345L,54346L,54347L,54348L,54349L,54350L,54351L,54352L,54353L,54354L, 54355L,54356L,54357L,54358L,54359L,54360L,54361L,54362L,54363L,54364L, 54365L,54366L,54367L,54368L,54369L,54370L,54371L,54372L,54373L,54374L, 54375L,54376L,54377L,54378L,54379L,54380L,54381L,54382L,54383L,54384L, 54385L,54386L,54387L,54388L,54389L,54390L,54391L,54392L,54393L,54394L, 54395L,54396L,54397L,54398L,54399L,54400L,54401L,54402L,54403L,54404L, 54405L,54406L,54407L,54408L,54409L,54410L,54411L,54412L,54413L,54414L, 54415L,54416L,54417L,54418L,54419L,54420L,54421L,54422L,54423L,54424L, 54425L,54426L,54427L,54428L,54429L,54430L,54431L,54432L,54433L,54434L, 54435L,54436L,54437L,54438L,54439L,54440L,54441L,54442L,54443L,54444L, 54445L,54446L,54447L,54448L,54449L,54450L,54451L,54452L,54453L,54454L, 54455L,54456L,54457L,54458L,54459L,54460L,54461L,54462L,54463L,54464L, 54465L,54466L,54467L,54468L,54469L,54470L,54471L,54472L,54473L,54474L, 54475L,54476L,54477L,54478L,54479L,54480L,54481L,54482L,54483L,54484L, 54485L,54486L,54487L,54488L,54489L,54490L,54491L,54492L,54493L,54494L, 54495L,54496L,54497L,54498L,54499L,54500L,54501L,54502L,54503L,54504L, 54505L,54506L,54507L,54508L,54509L,54510L,54511L,54512L,54513L,54514L, 54515L,54516L,54517L,54518L,54519L,54520L,54521L,54522L,54523L,54524L, 54525L,54526L,54527L,54528L,54529L,54530L,54531L,54532L,54533L,54534L, 54535L,54536L,54537L,54538L,54539L,54540L,54541L,54542L,54543L,54544L, 54545L,54546L,54547L,54548L,54549L,54550L,54551L,54552L,54553L,54554L, 54555L,54556L,54557L,54558L,54559L,54560L,54561L,54562L,54563L,54564L, 54565L,54566L,54567L,54568L,54569L,54570L,54571L,54572L,54573L,54574L, 54575L,54576L,54577L,54578L,54579L,54580L,54581L,54582L,54583L,54584L, 54585L,54586L,54587L,54588L,54589L,54590L,54591L,54592L,54593L,54594L, 54595L,54596L,54597L,54598L,54599L,54600L,54601L,54602L,54603L,54604L, 54605L,54606L,54607L,54608L,54609L,54610L,54611L,54612L,54613L,54614L, 54615L,54616L,54617L,54618L,54619L,54620L,54621L,54622L,54623L,54624L, 54625L,54626L,54627L,54628L,54629L,54630L,54631L,54632L,54633L,54634L, 54635L,54636L,54637L,54638L,54639L,54640L,54641L,54642L,54643L,54644L, 54645L,54646L,54647L,54648L,54649L,54650L,54651L,54652L,54653L,54654L, 54655L,54656L,54657L,54658L,54659L,54660L,54661L,54662L,54663L,54664L, 54665L,54666L,54667L,54668L,54669L,54670L,54671L,54672L,54673L,54674L, 54675L,54676L,54677L,54678L,54679L,54680L,54681L,54682L,54683L,54684L, 54685L,54686L,54687L,54688L,54689L,54690L,54691L,54692L,54693L,54694L, 54695L,54696L,54697L,54698L,54699L,54700L,54701L,54702L,54703L,54704L, 54705L,54706L,54707L,54708L,54709L,54710L,54711L,54712L,54713L,54714L, 54715L,54716L,54717L,54718L,54719L,54720L,54721L,54722L,54723L,54724L, 54725L,54726L,54727L,54728L,54729L,54730L,54731L,54732L,54733L,54734L, 54735L,54736L,54737L,54738L,54739L,54740L,54741L,54742L,54743L,54744L, 54745L,54746L,54747L,54748L,54749L,54750L,54751L,54752L,54753L,54754L, 54755L,54756L,54757L,54758L,54759L,54760L,54761L,54762L,54763L,54764L, 54765L,54766L,54767L,54768L,54769L,54770L,54771L,54772L,54773L,54774L, 54775L,54776L,54777L,54778L,54779L,54780L,54781L,54782L,54783L,54784L, 54785L,54786L,54787L,54788L,54789L,54790L,54791L,54792L,54793L,54794L, 54795L,54796L,54797L,54798L,54799L,54800L,54801L,54802L,54803L,54804L, 54805L,54806L,54807L,54808L,54809L,54810L,54811L,54812L,54813L,54814L, 54815L,54816L,54817L,54818L,54819L,54820L,54821L,54822L,54823L,54824L, 54825L,54826L,54827L,54828L,54829L,54830L,54831L,54832L,54833L,54834L, 54835L,54836L,54837L,54838L,54839L,54840L,54841L,54842L,54843L,54844L, 54845L,54846L,54847L,54848L,54849L,54850L,54851L,54852L,54853L,54854L, 54855L,54856L,54857L,54858L,54859L,54860L,54861L,54862L,54863L,54864L, 54865L,54866L,54867L,54868L,54869L,54870L,54871L,54872L,54873L,54874L, 54875L,54876L,54877L,54878L,54879L,54880L,54881L,54882L,54883L,54884L, 54885L,54886L,54887L,54888L,54889L,54890L,54891L,54892L,54893L,54894L, 54895L,54896L,54897L,54898L,54899L,54900L,54901L,54902L,54903L,54904L, 54905L,54906L,54907L,54908L,54909L,54910L,54911L,54912L,54913L,54914L, 54915L,54916L,54917L,54918L,54919L,54920L,54921L,54922L,54923L,54924L, 54925L,54926L,54927L,54928L,54929L,54930L,54931L,54932L,54933L,54934L, 54935L,54936L,54937L,54938L,54939L,54940L,54941L,54942L,54943L,54944L, 54945L,54946L,54947L,54948L,54949L,54950L,54951L,54952L,54953L,54954L, 54955L,54956L,54957L,54958L,54959L,54960L,54961L,54962L,54963L,54964L, 54965L,54966L,54967L,54968L,54969L,54970L,54971L,54972L,54973L,54974L, 54975L,54976L,54977L,54978L,54979L,54980L,54981L,54982L,54983L,54984L, 54985L,54986L,54987L,54988L,54989L,54990L,54991L,54992L,54993L,54994L, 54995L,54996L,54997L,54998L,54999L,55000L,55001L,55002L,55003L,55004L, 55005L,55006L,55007L,55008L,55009L,55010L,55011L,55012L,55013L,55014L, 55015L,55016L,55017L,55018L,55019L,55020L,55021L,55022L,55023L,55024L, 55025L,55026L,55027L,55028L,55029L,55030L,55031L,55032L,55033L,55034L, 55035L,55036L,55037L,55038L,55039L,55040L,55041L,55042L,55043L,55044L, 55045L,55046L,55047L,55048L,55049L,55050L,55051L,55052L,55053L,55054L, 55055L,55056L,55057L,55058L,55059L,55060L,55061L,55062L,55063L,55064L, 55065L,55066L,55067L,55068L,55069L,55070L,55071L,55072L,55073L,55074L, 55075L,55076L,55077L,55078L,55079L,55080L,55081L,55082L,55083L,55084L, 55085L,55086L,55087L,55088L,55089L,55090L,55091L,55092L,55093L,55094L, 55095L,55096L,55097L,55098L,55099L,55100L,55101L,55102L,55103L,55104L, 55105L,55106L,55107L,55108L,55109L,55110L,55111L,55112L,55113L,55114L, 55115L,55116L,55117L,55118L,55119L,55120L,55121L,55122L,55123L,55124L, 55125L,55126L,55127L,55128L,55129L,55130L,55131L,55132L,55133L,55134L, 55135L,55136L,55137L,55138L,55139L,55140L,55141L,55142L,55143L,55144L, 55145L,55146L,55147L,55148L,55149L,55150L,55151L,55152L,55153L,55154L, 55155L,55156L,55157L,55158L,55159L,55160L,55161L,55162L,55163L,55164L, 55165L,55166L,55167L,55168L,55169L,55170L,55171L,55172L,55173L,55174L, 55175L,55176L,55177L,55178L,55179L,55180L,55181L,55182L,55183L,55184L, 55185L,55186L,55187L,55188L,55189L,55190L,55191L,55192L,55193L,55194L, 55195L,55196L,55197L,55198L,55199L,55200L,55201L,55202L,55203L,55204L, 55205L,55206L,55207L,55208L,55209L,55210L,55211L,55212L,55213L,55214L, 55215L,55216L,55217L,55218L,55219L,55220L,55221L,55222L,55223L,55224L, 55225L,55226L,55227L,55228L,55229L,55230L,55231L,55232L,55233L,55234L, 55235L,55236L,55237L,55238L,55239L,55240L,55241L,55242L,55243L,55244L, 55245L,55246L,55247L,55248L,55249L,55250L,55251L,55252L,55253L,55254L, 55255L,55256L,55257L,55258L,55259L,55260L,55261L,55262L,55263L,55264L, 55265L,55266L,55267L,55268L,55269L,55270L,55271L,55272L,55273L,55274L, 55275L,55276L,55277L,55278L,55279L,55280L,55281L,55282L,55283L,55284L, 55285L,55286L,55287L,55288L,55289L,55290L,55291L,55292L,55293L,55294L, 55295L,55296L,55297L,55298L,55299L,55300L,55301L,55302L,55303L,55304L, 55305L,55306L,55307L,55308L,55309L,55310L,55311L,55312L,55313L,55314L, 55315L,55316L,55317L,55318L,55319L,55320L,55321L,55322L,55323L,55324L, 55325L,55326L,55327L,55328L,55329L,55330L,55331L,55332L,55333L,55334L, 55335L,55336L,55337L,55338L,55339L,55340L,55341L,55342L,55343L,55344L, 55345L,55346L,55347L,55348L,55349L,55350L,55351L,55352L,55353L,55354L, 55355L,55356L,55357L,55358L,55359L,55360L,55361L,55362L,55363L,55364L, 55365L,55366L,55367L,55368L,55369L,55370L,55371L,55372L,55373L,55374L, 55375L,55376L,55377L,55378L,55379L,55380L,55381L,55382L,55383L,55384L, 55385L,55386L,55387L,55388L,55389L,55390L,55391L,55392L,55393L,55394L, 55395L,55396L,55397L,55398L,55399L,55400L,55401L,55402L,55403L,55404L, 55405L,55406L,55407L,55408L,55409L,55410L,55411L,55412L,55413L,55414L, 55415L,55416L,55417L,55418L,55419L,55420L,55421L,55422L,55423L,55424L, 55425L,55426L,55427L,55428L,55429L,55430L,55431L,55432L,55433L,55434L, 55435L,55436L,55437L,55438L,55439L,55440L,55441L,55442L,55443L,55444L, 55445L,55446L,55447L,55448L,55449L,55450L,55451L,55452L,55453L,55454L, 55455L,55456L,55457L,55458L,55459L,55460L,55461L,55462L,55463L,55464L, 55465L,55466L,55467L,55468L,55469L,55470L,55471L,55472L,55473L,55474L, 55475L,55476L,55477L,55478L,55479L,55480L,55481L,55482L,55483L,55484L, 55485L,55486L,55487L,55488L,55489L,55490L,55491L,55492L,55493L,55494L, 55495L,55496L,55497L,55498L,55499L,55500L,55501L,55502L,55503L,55504L, 55505L,55506L,55507L,55508L,55509L,55510L,55511L,55512L,55513L,55514L, 55515L,55516L,55517L,55518L,55519L,55520L,55521L,55522L,55523L,55524L, 55525L,55526L,55527L,55528L,55529L,55530L,55531L,55532L,55533L,55534L, 55535L,55536L,55537L,55538L,55539L,55540L,55541L,55542L,55543L,55544L, 55545L,55546L,55547L,55548L,55549L,55550L,55551L,55552L,55553L,55554L, 55555L,55556L,55557L,55558L,55559L,55560L,55561L,55562L,55563L,55564L, 55565L,55566L,55567L,55568L,55569L,55570L,55571L,55572L,55573L,55574L, 55575L,55576L,55577L,55578L,55579L,55580L,55581L,55582L,55583L,55584L, 55585L,55586L,55587L,55588L,55589L,55590L,55591L,55592L,55593L,55594L, 55595L,55596L,55597L,55598L,55599L,55600L,55601L,55602L,55603L,55604L, 55605L,55606L,55607L,55608L,55609L,55610L,55611L,55612L,55613L,55614L, 55615L,55616L,55617L,55618L,55619L,55620L,55621L,55622L,55623L,55624L, 55625L,55626L,55627L,55628L,55629L,55630L,55631L,55632L,55633L,55634L, 55635L,55636L,55637L,55638L,55639L,55640L,55641L,55642L,55643L,55644L, 55645L,55646L,55647L,55648L,55649L,55650L,55651L,55652L,55653L,55654L, 55655L,55656L,55657L,55658L,55659L,55660L,55661L,55662L,55663L,55664L, 55665L,55666L,55667L,55668L,55669L,55670L,55671L,55672L,55673L,55674L, 55675L,55676L,55677L,55678L,55679L,55680L,55681L,55682L,55683L,55684L, 55685L,55686L,55687L,55688L,55689L,55690L,55691L,55692L,55693L,55694L, 55695L,55696L,55697L,55698L,55699L,55700L,55701L,55702L,55703L,55704L, 55705L,55706L,55707L,55708L,55709L,55710L,55711L,55712L,55713L,55714L, 55715L,55716L,55717L,55718L,55719L,55720L,55721L,55722L,55723L,55724L, 55725L,55726L,55727L,55728L,55729L,55730L,55731L,55732L,55733L,55734L, 55735L,55736L,55737L,55738L,55739L,55740L,55741L,55742L,55743L,55744L, 55745L,55746L,55747L,55748L,55749L,55750L,55751L,55752L,55753L,55754L, 55755L,55756L,55757L,55758L,55759L,55760L,55761L,55762L,55763L,55764L, 55765L,55766L,55767L,55768L,55769L,55770L,55771L,55772L,55773L,55774L, 55775L,55776L,55777L,55778L,55779L,55780L,55781L,55782L,55783L,55784L, 55785L,55786L,55787L,55788L,55789L,55790L,55791L,55792L,55793L,55794L, 55795L,55796L,55797L,55798L,55799L,55800L,55801L,55802L,55803L,55804L, 55805L,55806L,55807L,55808L,55809L,55810L,55811L,55812L,55813L,55814L, 55815L,55816L,55817L,55818L,55819L,55820L,55821L,55822L,55823L,55824L, 55825L,55826L,55827L,55828L,55829L,55830L,55831L,55832L,55833L,55834L, 55835L,55836L,55837L,55838L,55839L,55840L,55841L,55842L,55843L,55844L, 55845L,55846L,55847L,55848L,55849L,55850L,55851L,55852L,55853L,55854L, 55855L,55856L,55857L,55858L,55859L,55860L,55861L,55862L,55863L,55864L, 55865L,55866L,55867L,55868L,55869L,55870L,55871L,55872L,55873L,55874L, 55875L,55876L,55877L,55878L,55879L,55880L,55881L,55882L,55883L,55884L, 55885L,55886L,55887L,55888L,55889L,55890L,55891L,55892L,55893L,55894L, 55895L,55896L,55897L,55898L,55899L,55900L,55901L,55902L,55903L,55904L, 55905L,55906L,55907L,55908L,55909L,55910L,55911L,55912L,55913L,55914L, 55915L,55916L,55917L,55918L,55919L,55920L,55921L,55922L,55923L,55924L, 55925L,55926L,55927L,55928L,55929L,55930L,55931L,55932L,55933L,55934L, 55935L,55936L,55937L,55938L,55939L,55940L,55941L,55942L,55943L,55944L, 55945L,55946L,55947L,55948L,55949L,55950L,55951L,55952L,55953L,55954L, 55955L,55956L,55957L,55958L,55959L,55960L,55961L,55962L,55963L,55964L, 55965L,55966L,55967L,55968L,55969L,55970L,55971L,55972L,55973L,55974L, 55975L,55976L,55977L,55978L,55979L,55980L,55981L,55982L,55983L,55984L, 55985L,55986L,55987L,55988L,55989L,55990L,55991L,55992L,55993L,55994L, 55995L,55996L,55997L,55998L,55999L,56000L,56001L,56002L,56003L,56004L, 56005L,56006L,56007L,56008L,56009L,56010L,56011L,56012L,56013L,56014L, 56015L,56016L,56017L,56018L,56019L,56020L,56021L,56022L,56023L,56024L, 56025L,56026L,56027L,56028L,56029L,56030L,56031L,56032L,56033L,56034L, 56035L,56036L,56037L,56038L,56039L,56040L,56041L,56042L,56043L,56044L, 56045L,56046L,56047L,56048L,56049L,56050L,56051L,56052L,56053L,56054L, 56055L,56056L,56057L,56058L,56059L,56060L,56061L,56062L,56063L,56064L, 56065L,56066L,56067L,56068L,56069L,56070L,56071L,56072L,56073L,56074L, 56075L,56076L,56077L,56078L,56079L,56080L,56081L,56082L,56083L,56084L, 56085L,56086L,56087L,56088L,56089L,56090L,56091L,56092L,56093L,56094L, 56095L,56096L,56097L,56098L,56099L,56100L,56101L,56102L,56103L,56104L, 56105L,56106L,56107L,56108L,56109L,56110L,56111L,56112L,56113L,56114L, 56115L,56116L,56117L,56118L,56119L,56120L,56121L,56122L,56123L,56124L, 56125L,56126L,56127L,56128L,56129L,56130L,56131L,56132L,56133L,56134L, 56135L,56136L,56137L,56138L,56139L,56140L,56141L,56142L,56143L,56144L, 56145L,56146L,56147L,56148L,56149L,56150L,56151L,56152L,56153L,56154L, 56155L,56156L,56157L,56158L,56159L,56160L,56161L,56162L,56163L,56164L, 56165L,56166L,56167L,56168L,56169L,56170L,56171L,56172L,56173L,56174L, 56175L,56176L,56177L,56178L,56179L,56180L,56181L,56182L,56183L,56184L, 56185L,56186L,56187L,56188L,56189L,56190L,56191L,56192L,56193L,56194L, 56195L,56196L,56197L,56198L,56199L,56200L,56201L,56202L,56203L,56204L, 56205L,56206L,56207L,56208L,56209L,56210L,56211L,56212L,56213L,56214L, 56215L,56216L,56217L,56218L,56219L,56220L,56221L,56222L,56223L,56224L, 56225L,56226L,56227L,56228L,56229L,56230L,56231L,56232L,56233L,56234L, 56235L,56236L,56237L,56238L,56239L,56240L,56241L,56242L,56243L,56244L, 56245L,56246L,56247L,56248L,56249L,56250L,56251L,56252L,56253L,56254L, 56255L,56256L,56257L,56258L,56259L,56260L,56261L,56262L,56263L,56264L, 56265L,56266L,56267L,56268L,56269L,56270L,56271L,56272L,56273L,56274L, 56275L,56276L,56277L,56278L,56279L,56280L,56281L,56282L,56283L,56284L, 56285L,56286L,56287L,56288L,56289L,56290L,56291L,56292L,56293L,56294L, 56295L,56296L,56297L,56298L,56299L,56300L,56301L,56302L,56303L,56304L, 56305L,56306L,56307L,56308L,56309L,56310L,56311L,56312L,56313L,56314L, 56315L,56316L,56317L,56318L,56319L,56320L,56321L,56322L,56323L,56324L, 56325L,56326L,56327L,56328L,56329L,56330L,56331L,56332L,56333L,56334L, 56335L,56336L,56337L,56338L,56339L,56340L,56341L,56342L,56343L,56344L, 56345L,56346L,56347L,56348L,56349L,56350L,56351L,56352L,56353L,56354L, 56355L,56356L,56357L,56358L,56359L,56360L,56361L,56362L,56363L,56364L, 56365L,56366L,56367L,56368L,56369L,56370L,56371L,56372L,56373L,56374L, 56375L,56376L,56377L,56378L,56379L,56380L,56381L,56382L,56383L,56384L, 56385L,56386L,56387L,56388L,56389L,56390L,56391L,56392L,56393L,56394L, 56395L,56396L,56397L,56398L,56399L,56400L,56401L,56402L,56403L,56404L, 56405L,56406L,56407L,56408L,56409L,56410L,56411L,56412L,56413L,56414L, 56415L,56416L,56417L,56418L,56419L,56420L,56421L,56422L,56423L,56424L, 56425L,56426L,56427L,56428L,56429L,56430L,56431L,56432L,56433L,56434L, 56435L,56436L,56437L,56438L,56439L,56440L,56441L,56442L,56443L,56444L, 56445L,56446L,56447L,56448L,56449L,56450L,56451L,56452L,56453L,56454L, 56455L,56456L,56457L,56458L,56459L,56460L,56461L,56462L,56463L,56464L, 56465L,56466L,56467L,56468L,56469L,56470L,56471L,56472L,56473L,56474L, 56475L,56476L,56477L,56478L,56479L,56480L,56481L,56482L,56483L,56484L, 56485L,56486L,56487L,56488L,56489L,56490L,56491L,56492L,56493L,56494L, 56495L,56496L,56497L,56498L,56499L,56500L,56501L,56502L,56503L,56504L, 56505L,56506L,56507L,56508L,56509L,56510L,56511L,56512L,56513L,56514L, 56515L,56516L,56517L,56518L,56519L,56520L,56521L,56522L,56523L,56524L, 56525L,56526L,56527L,56528L,56529L,56530L,56531L,56532L,56533L,56534L, 56535L,56536L,56537L,56538L,56539L,56540L,56541L,56542L,56543L,56544L, 56545L,56546L,56547L,56548L,56549L,56550L,56551L,56552L,56553L,56554L, 56555L,56556L,56557L,56558L,56559L,56560L,56561L,56562L,56563L,56564L, 56565L,56566L,56567L,56568L,56569L,56570L,56571L,56572L,56573L,56574L, 56575L,56576L,56577L,56578L,56579L,56580L,56581L,56582L,56583L,56584L, 56585L,56586L,56587L,56588L,56589L,56590L,56591L,56592L,56593L,56594L, 56595L,56596L,56597L,56598L,56599L,56600L,56601L,56602L,56603L,56604L, 56605L,56606L,56607L,56608L,56609L,56610L,56611L,56612L,56613L,56614L, 56615L,56616L,56617L,56618L,56619L,56620L,56621L,56622L,56623L,56624L, 56625L,56626L,56627L,56628L,56629L,56630L,56631L,56632L,56633L,56634L, 56635L,56636L,56637L,56638L,56639L,56640L,56641L,56642L,56643L,56644L, 56645L,56646L,56647L,56648L,56649L,56650L,56651L,56652L,56653L,56654L, 56655L,56656L,56657L,56658L,56659L,56660L,56661L,56662L,56663L,56664L, 56665L,56666L,56667L,56668L,56669L,56670L,56671L,56672L,56673L,56674L, 56675L,56676L,56677L,56678L,56679L,56680L,56681L,56682L,56683L,56684L, 56685L,56686L,56687L,56688L,56689L,56690L,56691L,56692L,56693L,56694L, 56695L,56696L,56697L,56698L,56699L,56700L,56701L,56702L,56703L,56704L, 56705L,56706L,56707L,56708L,56709L,56710L,56711L,56712L,56713L,56714L, 56715L,56716L,56717L,56718L,56719L,56720L,56721L,56722L,56723L,56724L, 56725L,56726L,56727L,56728L,56729L,56730L,56731L,56732L,56733L,56734L, 56735L,56736L,56737L,56738L,56739L,56740L,56741L,56742L,56743L,56744L, 56745L,56746L,56747L,56748L,56749L,56750L,56751L,56752L,56753L,56754L, 56755L,56756L,56757L,56758L,56759L,56760L,56761L,56762L,56763L,56764L, 56765L,56766L,56767L,56768L,56769L,56770L,56771L,56772L,56773L,56774L, 56775L,56776L,56777L,56778L,56779L,56780L,56781L,56782L,56783L,56784L, 56785L,56786L,56787L,56788L,56789L,56790L,56791L,56792L,56793L,56794L, 56795L,56796L,56797L,56798L,56799L,56800L,56801L,56802L,56803L,56804L, 56805L,56806L,56807L,56808L,56809L,56810L,56811L,56812L,56813L,56814L, 56815L,56816L,56817L,56818L,56819L,56820L,56821L,56822L,56823L,56824L, 56825L,56826L,56827L,56828L,56829L,56830L,56831L,56832L,56833L,56834L, 56835L,56836L,56837L,56838L,56839L,56840L,56841L,56842L,56843L,56844L, 56845L,56846L,56847L,56848L,56849L,56850L,56851L,56852L,56853L,56854L, 56855L,56856L,56857L,56858L,56859L,56860L,56861L,56862L,56863L,56864L, 56865L,56866L,56867L,56868L,56869L,56870L,56871L,56872L,56873L,56874L, 56875L,56876L,56877L,56878L,56879L,56880L,56881L,56882L,56883L,56884L, 56885L,56886L,56887L,56888L,56889L,56890L,56891L,56892L,56893L,56894L, 56895L,56896L,56897L,56898L,56899L,56900L,56901L,56902L,56903L,56904L, 56905L,56906L,56907L,56908L,56909L,56910L,56911L,56912L,56913L,56914L, 56915L,56916L,56917L,56918L,56919L,56920L,56921L,56922L,56923L,56924L, 56925L,56926L,56927L,56928L,56929L,56930L,56931L,56932L,56933L,56934L, 56935L,56936L,56937L,56938L,56939L,56940L,56941L,56942L,56943L,56944L, 56945L,56946L,56947L,56948L,56949L,56950L,56951L,56952L,56953L,56954L, 56955L,56956L,56957L,56958L,56959L,56960L,56961L,56962L,56963L,56964L, 56965L,56966L,56967L,56968L,56969L,56970L,56971L,56972L,56973L,56974L, 56975L,56976L,56977L,56978L,56979L,56980L,56981L,56982L,56983L,56984L, 56985L,56986L,56987L,56988L,56989L,56990L,56991L,56992L,56993L,56994L, 56995L,56996L,56997L,56998L,56999L,57000L,57001L,57002L,57003L,57004L, 57005L,57006L,57007L,57008L,57009L,57010L,57011L,57012L,57013L,57014L, 57015L,57016L,57017L,57018L,57019L,57020L,57021L,57022L,57023L,57024L, 57025L,57026L,57027L,57028L,57029L,57030L,57031L,57032L,57033L,57034L, 57035L,57036L,57037L,57038L,57039L,57040L,57041L,57042L,57043L,57044L, 57045L,57046L,57047L,57048L,57049L,57050L,57051L,57052L,57053L,57054L, 57055L,57056L,57057L,57058L,57059L,57060L,57061L,57062L,57063L,57064L, 57065L,57066L,57067L,57068L,57069L,57070L,57071L,57072L,57073L,57074L, 57075L,57076L,57077L,57078L,57079L,57080L,57081L,57082L,57083L,57084L, 57085L,57086L,57087L,57088L,57089L,57090L,57091L,57092L,57093L,57094L, 57095L,57096L,57097L,57098L,57099L,57100L,57101L,57102L,57103L,57104L, 57105L,57106L,57107L,57108L,57109L,57110L,57111L,57112L,57113L,57114L, 57115L,57116L,57117L,57118L,57119L,57120L,57121L,57122L,57123L,57124L, 57125L,57126L,57127L,57128L,57129L,57130L,57131L,57132L,57133L,57134L, 57135L,57136L,57137L,57138L,57139L,57140L,57141L,57142L,57143L,57144L, 57145L,57146L,57147L,57148L,57149L,57150L,57151L,57152L,57153L,57154L, 57155L,57156L,57157L,57158L,57159L,57160L,57161L,57162L,57163L,57164L, 57165L,57166L,57167L,57168L,57169L,57170L,57171L,57172L,57173L,57174L, 57175L,57176L,57177L,57178L,57179L,57180L,57181L,57182L,57183L,57184L, 57185L,57186L,57187L,57188L,57189L,57190L,57191L,57192L,57193L,57194L, 57195L,57196L,57197L,57198L,57199L,57200L,57201L,57202L,57203L,57204L, 57205L,57206L,57207L,57208L,57209L,57210L,57211L,57212L,57213L,57214L, 57215L,57216L,57217L,57218L,57219L,57220L,57221L,57222L,57223L,57224L, 57225L,57226L,57227L,57228L,57229L,57230L,57231L,57232L,57233L,57234L, 57235L,57236L,57237L,57238L,57239L,57240L,57241L,57242L,57243L,57244L, 57245L,57246L,57247L,57248L,57249L,57250L,57251L,57252L,57253L,57254L, 57255L,57256L,57257L,57258L,57259L,57260L,57261L,57262L,57263L,57264L, 57265L,57266L,57267L,57268L,57269L,57270L,57271L,57272L,57273L,57274L, 57275L,57276L,57277L,57278L,57279L,57280L,57281L,57282L,57283L,57284L, 57285L,57286L,57287L,57288L,57289L,57290L,57291L,57292L,57293L,57294L, 57295L,57296L,57297L,57298L,57299L,57300L,57301L,57302L,57303L,57304L, 57305L,57306L,57307L,57308L,57309L,57310L,57311L,57312L,57313L,57314L, 57315L,57316L,57317L,57318L,57319L,57320L,57321L,57322L,57323L,57324L, 57325L,57326L,57327L,57328L,57329L,57330L,57331L,57332L,57333L,57334L, 57335L,57336L,57337L,57338L,57339L,57340L,57341L,57342L,57343L,57344L, 57345L,57346L,57347L,57348L,57349L,57350L,57351L,57352L,57353L,57354L, 57355L,57356L,57357L,57358L,57359L,57360L,57361L,57362L,57363L,57364L, 57365L,57366L,57367L,57368L,57369L,57370L,57371L,57372L,57373L,57374L, 57375L,57376L,57377L,57378L,57379L,57380L,57381L,57382L,57383L,57384L, 57385L,57386L,57387L,57388L,57389L,57390L,57391L,57392L,57393L,57394L, 57395L,57396L,57397L,57398L,57399L,57400L,57401L,57402L,57403L,57404L, 57405L,57406L,57407L,57408L,57409L,57410L,57411L,57412L,57413L,57414L, 57415L,57416L,57417L,57418L,57419L,57420L,57421L,57422L,57423L,57424L, 57425L,57426L,57427L,57428L,57429L,57430L,57431L,57432L,57433L,57434L, 57435L,57436L,57437L,57438L,57439L,57440L,57441L,57442L,57443L,57444L, 57445L,57446L,57447L,57448L,57449L,57450L,57451L,57452L,57453L,57454L, 57455L,57456L,57457L,57458L,57459L,57460L,57461L,57462L,57463L,57464L, 57465L,57466L,57467L,57468L,57469L,57470L,57471L,57472L,57473L,57474L, 57475L,57476L,57477L,57478L,57479L,57480L,57481L,57482L,57483L,57484L, 57485L,57486L,57487L,57488L,57489L,57490L,57491L,57492L,57493L,57494L, 57495L,57496L,57497L,57498L,57499L,57500L,57501L,57502L,57503L,57504L, 57505L,57506L,57507L,57508L,57509L,57510L,57511L,57512L,57513L,57514L, 57515L,57516L,57517L,57518L,57519L,57520L,57521L,57522L,57523L,57524L, 57525L,57526L,57527L,57528L,57529L,57530L,57531L,57532L,57533L,57534L, 57535L,57536L,57537L,57538L,57539L,57540L,57541L,57542L,57543L,57544L, 57545L,57546L,57547L,57548L,57549L,57550L,57551L,57552L,57553L,57554L, 57555L,57556L,57557L,57558L,57559L,57560L,57561L,57562L,57563L,57564L, 57565L,57566L,57567L,57568L,57569L,57570L,57571L,57572L,57573L,57574L, 57575L,57576L,57577L,57578L,57579L,57580L,57581L,57582L,57583L,57584L, 57585L,57586L,57587L,57588L,57589L,57590L,57591L,57592L,57593L,57594L, 57595L,57596L,57597L,57598L,57599L,57600L,57601L,57602L,57603L,57604L, 57605L,57606L,57607L,57608L,57609L,57610L,57611L,57612L,57613L,57614L, 57615L,57616L,57617L,57618L,57619L,57620L,57621L,57622L,57623L,57624L, 57625L,57626L,57627L,57628L,57629L,57630L,57631L,57632L,57633L,57634L, 57635L,57636L,57637L,57638L,57639L,57640L,57641L,57642L,57643L,57644L, 57645L,57646L,57647L,57648L,57649L,57650L,57651L,57652L,57653L,57654L, 57655L,57656L,57657L,57658L,57659L,57660L,57661L,57662L,57663L,57664L, 57665L,57666L,57667L,57668L,57669L,57670L,57671L,57672L,57673L,57674L, 57675L,57676L,57677L,57678L,57679L,57680L,57681L,57682L,57683L,57684L, 57685L,57686L,57687L,57688L,57689L,57690L,57691L,57692L,57693L,57694L, 57695L,57696L,57697L,57698L,57699L,57700L,57701L,57702L,57703L,57704L, 57705L,57706L,57707L,57708L,57709L,57710L,57711L,57712L,57713L,57714L, 57715L,57716L,57717L,57718L,57719L,57720L,57721L,57722L,57723L,57724L, 57725L,57726L,57727L,57728L,57729L,57730L,57731L,57732L,57733L,57734L, 57735L,57736L,57737L,57738L,57739L,57740L,57741L,57742L,57743L,57744L, 57745L,57746L,57747L,57748L,57749L,57750L,57751L,57752L,57753L,57754L, 57755L,57756L,57757L,57758L,57759L,57760L,57761L,57762L,57763L,57764L, 57765L,57766L,57767L,57768L,57769L,57770L,57771L,57772L,57773L,57774L, 57775L,57776L,57777L,57778L,57779L,57780L,57781L,57782L,57783L,57784L, 57785L,57786L,57787L,57788L,57789L,57790L,57791L,57792L,57793L,57794L, 57795L,57796L,57797L,57798L,57799L,57800L,57801L,57802L,57803L,57804L, 57805L,57806L,57807L,57808L,57809L,57810L,57811L,57812L,57813L,57814L, 57815L,57816L,57817L,57818L,57819L,57820L,57821L,57822L,57823L,57824L, 57825L,57826L,57827L,57828L,57829L,57830L,57831L,57832L,57833L,57834L, 57835L,57836L,57837L,57838L,57839L,57840L,57841L,57842L,57843L,57844L, 57845L,57846L,57847L,57848L,57849L,57850L,57851L,57852L,57853L,57854L, 57855L,57856L,57857L,57858L,57859L,57860L,57861L,57862L,57863L,57864L, 57865L,57866L,57867L,57868L,57869L,57870L,57871L,57872L,57873L,57874L, 57875L,57876L,57877L,57878L,57879L,57880L,57881L,57882L,57883L,57884L, 57885L,57886L,57887L,57888L,57889L,57890L,57891L,57892L,57893L,57894L, 57895L,57896L,57897L,57898L,57899L,57900L,57901L,57902L,57903L,57904L, 57905L,57906L,57907L,57908L,57909L,57910L,57911L,57912L,57913L,57914L, 57915L,57916L,57917L,57918L,57919L,57920L,57921L,57922L,57923L,57924L, 57925L,57926L,57927L,57928L,57929L,57930L,57931L,57932L,57933L,57934L, 57935L,57936L,57937L,57938L,57939L,57940L,57941L,57942L,57943L,57944L, 57945L,57946L,57947L,57948L,57949L,57950L,57951L,57952L,57953L,57954L, 57955L,57956L,57957L,57958L,57959L,57960L,57961L,57962L,57963L,57964L, 57965L,57966L,57967L,57968L,57969L,57970L,57971L,57972L,57973L,57974L, 57975L,57976L,57977L,57978L,57979L,57980L,57981L,57982L,57983L,57984L, 57985L,57986L,57987L,57988L,57989L,57990L,57991L,57992L,57993L,57994L, 57995L,57996L,57997L,57998L,57999L,58000L,58001L,58002L,58003L,58004L, 58005L,58006L,58007L,58008L,58009L,58010L,58011L,58012L,58013L,58014L, 58015L,58016L,58017L,58018L,58019L,58020L,58021L,58022L,58023L,58024L, 58025L,58026L,58027L,58028L,58029L,58030L,58031L,58032L,58033L,58034L, 58035L,58036L,58037L,58038L,58039L,58040L,58041L,58042L,58043L,58044L, 58045L,58046L,58047L,58048L,58049L,58050L,58051L,58052L,58053L,58054L, 58055L,58056L,58057L,58058L,58059L,58060L,58061L,58062L,58063L,58064L, 58065L,58066L,58067L,58068L,58069L,58070L,58071L,58072L,58073L,58074L, 58075L,58076L,58077L,58078L,58079L,58080L,58081L,58082L,58083L,58084L, 58085L,58086L,58087L,58088L,58089L,58090L,58091L,58092L,58093L,58094L, 58095L,58096L,58097L,58098L,58099L,58100L,58101L,58102L,58103L,58104L, 58105L,58106L,58107L,58108L,58109L,58110L,58111L,58112L,58113L,58114L, 58115L,58116L,58117L,58118L,58119L,58120L,58121L,58122L,58123L,58124L, 58125L,58126L,58127L,58128L,58129L,58130L,58131L,58132L,58133L,58134L, 58135L,58136L,58137L,58138L,58139L,58140L,58141L,58142L,58143L,58144L, 58145L,58146L,58147L,58148L,58149L,58150L,58151L,58152L,58153L,58154L, 58155L,58156L,58157L,58158L,58159L,58160L,58161L,58162L,58163L,58164L, 58165L,58166L,58167L,58168L,58169L,58170L,58171L,58172L,58173L,58174L, 58175L,58176L,58177L,58178L,58179L,58180L,58181L,58182L,58183L,58184L, 58185L,58186L,58187L,58188L,58189L,58190L,58191L,58192L,58193L,58194L, 58195L,58196L,58197L,58198L,58199L,58200L,58201L,58202L,58203L,58204L, 58205L,58206L,58207L,58208L,58209L,58210L,58211L,58212L,58213L,58214L, 58215L,58216L,58217L,58218L,58219L,58220L,58221L,58222L,58223L,58224L, 58225L,58226L,58227L,58228L,58229L,58230L,58231L,58232L,58233L,58234L, 58235L,58236L,58237L,58238L,58239L,58240L,58241L,58242L,58243L,58244L, 58245L,58246L,58247L,58248L,58249L,58250L,58251L,58252L,58253L,58254L, 58255L,58256L,58257L,58258L,58259L,58260L,58261L,58262L,58263L,58264L, 58265L,58266L,58267L,58268L,58269L,58270L,58271L,58272L,58273L,58274L, 58275L,58276L,58277L,58278L,58279L,58280L,58281L,58282L,58283L,58284L, 58285L,58286L,58287L,58288L,58289L,58290L,58291L,58292L,58293L,58294L, 58295L,58296L,58297L,58298L,58299L,58300L,58301L,58302L,58303L,58304L, 58305L,58306L,58307L,58308L,58309L,58310L,58311L,58312L,58313L,58314L, 58315L,58316L,58317L,58318L,58319L,58320L,58321L,58322L,58323L,58324L, 58325L,58326L,58327L,58328L,58329L,58330L,58331L,58332L,58333L,58334L, 58335L,58336L,58337L,58338L,58339L,58340L,58341L,58342L,58343L,58344L, 58345L,58346L,58347L,58348L,58349L,58350L,58351L,58352L,58353L,58354L, 58355L,58356L,58357L,58358L,58359L,58360L,58361L,58362L,58363L,58364L, 58365L,58366L,58367L,58368L,58369L,58370L,58371L,58372L,58373L,58374L, 58375L,58376L,58377L,58378L,58379L,58380L,58381L,58382L,58383L,58384L, 58385L,58386L,58387L,58388L,58389L,58390L,58391L,58392L,58393L,58394L, 58395L,58396L,58397L,58398L,58399L,58400L,58401L,58402L,58403L,58404L, 58405L,58406L,58407L,58408L,58409L,58410L,58411L,58412L,58413L,58414L, 58415L,58416L,58417L,58418L,58419L,58420L,58421L,58422L,58423L,58424L, 58425L,58426L,58427L,58428L,58429L,58430L,58431L,58432L,58433L,58434L, 58435L,58436L,58437L,58438L,58439L,58440L,58441L,58442L,58443L,58444L, 58445L,58446L,58447L,58448L,58449L,58450L,58451L,58452L,58453L,58454L, 58455L,58456L,58457L,58458L,58459L,58460L,58461L,58462L,58463L,58464L, 58465L,58466L,58467L,58468L,58469L,58470L,58471L,58472L,58473L,58474L, 58475L,58476L,58477L,58478L,58479L,58480L,58481L,58482L,58483L,58484L, 58485L,58486L,58487L,58488L,58489L,58490L,58491L,58492L,58493L,58494L, 58495L,58496L,58497L,58498L,58499L,58500L,58501L,58502L,58503L,58504L, 58505L,58506L,58507L,58508L,58509L,58510L,58511L,58512L,58513L,58514L, 58515L,58516L,58517L,58518L,58519L,58520L,58521L,58522L,58523L,58524L, 58525L,58526L,58527L,58528L,58529L,58530L,58531L,58532L,58533L,58534L, 58535L,58536L,58537L,58538L,58539L,58540L,58541L,58542L,58543L,58544L, 58545L,58546L,58547L,58548L,58549L,58550L,58551L,58552L,58553L,58554L, 58555L,58556L,58557L,58558L,58559L,58560L,58561L,58562L,58563L,58564L, 58565L,58566L,58567L,58568L,58569L,58570L,58571L,58572L,58573L,58574L, 58575L,58576L,58577L,58578L,58579L,58580L,58581L,58582L,58583L,58584L, 58585L,58586L,58587L,58588L,58589L,58590L,58591L,58592L,58593L,58594L, 58595L,58596L,58597L,58598L,58599L,58600L,58601L,58602L,58603L,58604L, 58605L,58606L,58607L,58608L,58609L,58610L,58611L,58612L,58613L,58614L, 58615L,58616L,58617L,58618L,58619L,58620L,58621L,58622L,58623L,58624L, 58625L,58626L,58627L,58628L,58629L,58630L,58631L,58632L,58633L,58634L, 58635L,58636L,58637L,58638L,58639L,58640L,58641L,58642L,58643L,58644L, 58645L,58646L,58647L,58648L,58649L,58650L,58651L,58652L,58653L,58654L, 58655L,58656L,58657L,58658L,58659L,58660L,58661L,58662L,58663L,58664L, 58665L,58666L,58667L,58668L,58669L,58670L,58671L,58672L,58673L,58674L, 58675L,58676L,58677L,58678L,58679L,58680L,58681L,58682L,58683L,58684L, 58685L,58686L,58687L,58688L,58689L,58690L,58691L,58692L,58693L,58694L, 58695L,58696L,58697L,58698L,58699L,58700L,58701L,58702L,58703L,58704L, 58705L,58706L,58707L,58708L,58709L,58710L,58711L,58712L,58713L,58714L, 58715L,58716L,58717L,58718L,58719L,58720L,58721L,58722L,58723L,58724L, 58725L,58726L,58727L,58728L,58729L,58730L,58731L,58732L,58733L,58734L, 58735L,58736L,58737L,58738L,58739L,58740L,58741L,58742L,58743L,58744L, 58745L,58746L,58747L,58748L,58749L,58750L,58751L,58752L,58753L,58754L, 58755L,58756L,58757L,58758L,58759L,58760L,58761L,58762L,58763L,58764L, 58765L,58766L,58767L,58768L,58769L,58770L,58771L,58772L,58773L,58774L, 58775L,58776L,58777L,58778L,58779L,58780L,58781L,58782L,58783L,58784L, 58785L,58786L,58787L,58788L,58789L,58790L,58791L,58792L,58793L,58794L, 58795L,58796L,58797L,58798L,58799L,58800L,58801L,58802L,58803L,58804L, 58805L,58806L,58807L,58808L,58809L,58810L,58811L,58812L,58813L,58814L, 58815L,58816L,58817L,58818L,58819L,58820L,58821L,58822L,58823L,58824L, 58825L,58826L,58827L,58828L,58829L,58830L,58831L,58832L,58833L,58834L, 58835L,58836L,58837L,58838L,58839L,58840L,58841L,58842L,58843L,58844L, 58845L,58846L,58847L,58848L,58849L,58850L,58851L,58852L,58853L,58854L, 58855L,58856L,58857L,58858L,58859L,58860L,58861L,58862L,58863L,58864L, 58865L,58866L,58867L,58868L,58869L,58870L,58871L,58872L,58873L,58874L, 58875L,58876L,58877L,58878L,58879L,58880L,58881L,58882L,58883L,58884L, 58885L,58886L,58887L,58888L,58889L,58890L,58891L,58892L,58893L,58894L, 58895L,58896L,58897L,58898L,58899L,58900L,58901L,58902L,58903L,58904L, 58905L,58906L,58907L,58908L,58909L,58910L,58911L,58912L,58913L,58914L, 58915L,58916L,58917L,58918L,58919L,58920L,58921L,58922L,58923L,58924L, 58925L,58926L,58927L,58928L,58929L,58930L,58931L,58932L,58933L,58934L, 58935L,58936L,58937L,58938L,58939L,58940L,58941L,58942L,58943L,58944L, 58945L,58946L,58947L,58948L,58949L,58950L,58951L,58952L,58953L,58954L, 58955L,58956L,58957L,58958L,58959L,58960L,58961L,58962L,58963L,58964L, 58965L,58966L,58967L,58968L,58969L,58970L,58971L,58972L,58973L,58974L, 58975L,58976L,58977L,58978L,58979L,58980L,58981L,58982L,58983L,58984L, 58985L,58986L,58987L,58988L,58989L,58990L,58991L,58992L,58993L,58994L, 58995L,58996L,58997L,58998L,58999L,59000L,59001L,59002L,59003L,59004L, 59005L,59006L,59007L,59008L,59009L,59010L,59011L,59012L,59013L,59014L, 59015L,59016L,59017L,59018L,59019L,59020L,59021L,59022L,59023L,59024L, 59025L,59026L,59027L,59028L,59029L,59030L,59031L,59032L,59033L,59034L, 59035L,59036L,59037L,59038L,59039L,59040L,59041L,59042L,59043L,59044L, 59045L,59046L,59047L,59048L,59049L,59050L,59051L,59052L,59053L,59054L, 59055L,59056L,59057L,59058L,59059L,59060L,59061L,59062L,59063L,59064L, 59065L,59066L,59067L,59068L,59069L,59070L,59071L,59072L,59073L,59074L, 59075L,59076L,59077L,59078L,59079L,59080L,59081L,59082L,59083L,59084L, 59085L,59086L,59087L,59088L,59089L,59090L,59091L,59092L,59093L,59094L, 59095L,59096L,59097L,59098L,59099L,59100L,59101L,59102L,59103L,59104L, 59105L,59106L,59107L,59108L,59109L,59110L,59111L,59112L,59113L,59114L, 59115L,59116L,59117L,59118L,59119L,59120L,59121L,59122L,59123L,59124L, 59125L,59126L,59127L,59128L,59129L,59130L,59131L,59132L,59133L,59134L, 59135L,59136L,59137L,59138L,59139L,59140L,59141L,59142L,59143L,59144L, 59145L,59146L,59147L,59148L,59149L,59150L,59151L,59152L,59153L,59154L, 59155L,59156L,59157L,59158L,59159L,59160L,59161L,59162L,59163L,59164L, 59165L,59166L,59167L,59168L,59169L,59170L,59171L,59172L,59173L,59174L, 59175L,59176L,59177L,59178L,59179L,59180L,59181L,59182L,59183L,59184L, 59185L,59186L,59187L,59188L,59189L,59190L,59191L,59192L,59193L,59194L, 59195L,59196L,59197L,59198L,59199L,59200L,59201L,59202L,59203L,59204L, 59205L,59206L,59207L,59208L,59209L,59210L,59211L,59212L,59213L,59214L, 59215L,59216L,59217L,59218L,59219L,59220L,59221L,59222L,59223L,59224L, 59225L,59226L,59227L,59228L,59229L,59230L,59231L,59232L,59233L,59234L, 59235L,59236L,59237L,59238L,59239L,59240L,59241L,59242L,59243L,59244L, 59245L,59246L,59247L,59248L,59249L,59250L,59251L,59252L,59253L,59254L, 59255L,59256L,59257L,59258L,59259L,59260L,59261L,59262L,59263L,59264L, 59265L,59266L,59267L,59268L,59269L,59270L,59271L,59272L,59273L,59274L, 59275L,59276L,59277L,59278L,59279L,59280L,59281L,59282L,59283L,59284L, 59285L,59286L,59287L,59288L,59289L,59290L,59291L,59292L,59293L,59294L, 59295L,59296L,59297L,59298L,59299L,59300L,59301L,59302L,59303L,59304L, 59305L,59306L,59307L,59308L,59309L,59310L,59311L,59312L,59313L,59314L, 59315L,59316L,59317L,59318L,59319L,59320L,59321L,59322L,59323L,59324L, 59325L,59326L,59327L,59328L,59329L,59330L,59331L,59332L,59333L,59334L, 59335L,59336L,59337L,59338L,59339L,59340L,59341L,59342L,59343L,59344L, 59345L,59346L,59347L,59348L,59349L,59350L,59351L,59352L,59353L,59354L, 59355L,59356L,59357L,59358L,59359L,59360L,59361L,59362L,59363L,59364L, 59365L,59366L,59367L,59368L,59369L,59370L,59371L,59372L,59373L,59374L, 59375L,59376L,59377L,59378L,59379L,59380L,59381L,59382L,59383L,59384L, 59385L,59386L,59387L,59388L,59389L,59390L,59391L,59392L,59393L,59394L, 59395L,59396L,59397L,59398L,59399L,59400L,59401L,59402L,59403L,59404L, 59405L,59406L,59407L,59408L,59409L,59410L,59411L,59412L,59413L,59414L, 59415L,59416L,59417L,59418L,59419L,59420L,59421L,59422L,59423L,59424L, 59425L,59426L,59427L,59428L,59429L,59430L,59431L,59432L,59433L,59434L, 59435L,59436L,59437L,59438L,59439L,59440L,59441L,59442L,59443L,59444L, 59445L,59446L,59447L,59448L,59449L,59450L,59451L,59452L,59453L,59454L, 59455L,59456L,59457L,59458L,59459L,59460L,59461L,59462L,59463L,59464L, 59465L,59466L,59467L,59468L,59469L,59470L,59471L,59472L,59473L,59474L, 59475L,59476L,59477L,59478L,59479L,59480L,59481L,59482L,59483L,59484L, 59485L,59486L,59487L,59488L,59489L,59490L,59491L,59492L,59493L,59494L, 59495L,59496L,59497L,59498L,59499L,59500L,59501L,59502L,59503L,59504L, 59505L,59506L,59507L,59508L,59509L,59510L,59511L,59512L,59513L,59514L, 59515L,59516L,59517L,59518L,59519L,59520L,59521L,59522L,59523L,59524L, 59525L,59526L,59527L,59528L,59529L,59530L,59531L,59532L,59533L,59534L, 59535L,59536L,59537L,59538L,59539L,59540L,59541L,59542L,59543L,59544L, 59545L,59546L,59547L,59548L,59549L,59550L,59551L,59552L,59553L,59554L, 59555L,59556L,59557L,59558L,59559L,59560L,59561L,59562L,59563L,59564L, 59565L,59566L,59567L,59568L,59569L,59570L,59571L,59572L,59573L,59574L, 59575L,59576L,59577L,59578L,59579L,59580L,59581L,59582L,59583L,59584L, 59585L,59586L,59587L,59588L,59589L,59590L,59591L,59592L,59593L,59594L, 59595L,59596L,59597L,59598L,59599L,59600L,59601L,59602L,59603L,59604L, 59605L,59606L,59607L,59608L,59609L,59610L,59611L,59612L,59613L,59614L, 59615L,59616L,59617L,59618L,59619L,59620L,59621L,59622L,59623L,59624L, 59625L,59626L,59627L,59628L,59629L,59630L,59631L,59632L,59633L,59634L, 59635L,59636L,59637L,59638L,59639L,59640L,59641L,59642L,59643L,59644L, 59645L,59646L,59647L,59648L,59649L,59650L,59651L,59652L,59653L,59654L, 59655L,59656L,59657L,59658L,59659L,59660L,59661L,59662L,59663L,59664L, 59665L,59666L,59667L,59668L,59669L,59670L,59671L,59672L,59673L,59674L, 59675L,59676L,59677L,59678L,59679L,59680L,59681L,59682L,59683L,59684L, 59685L,59686L,59687L,59688L,59689L,59690L,59691L,59692L,59693L,59694L, 59695L,59696L,59697L,59698L,59699L,59700L,59701L,59702L,59703L,59704L, 59705L,59706L,59707L,59708L,59709L,59710L,59711L,59712L,59713L,59714L, 59715L,59716L,59717L,59718L,59719L,59720L,59721L,59722L,59723L,59724L, 59725L,59726L,59727L,59728L,59729L,59730L,59731L,59732L,59733L,59734L, 59735L,59736L,59737L,59738L,59739L,59740L,59741L,59742L,59743L,59744L, 59745L,59746L,59747L,59748L,59749L,59750L,59751L,59752L,59753L,59754L, 59755L,59756L,59757L,59758L,59759L,59760L,59761L,59762L,59763L,59764L, 59765L,59766L,59767L,59768L,59769L,59770L,59771L,59772L,59773L,59774L, 59775L,59776L,59777L,59778L,59779L,59780L,59781L,59782L,59783L,59784L, 59785L,59786L,59787L,59788L,59789L,59790L,59791L,59792L,59793L,59794L, 59795L,59796L,59797L,59798L,59799L,59800L,59801L,59802L,59803L,59804L, 59805L,59806L,59807L,59808L,59809L,59810L,59811L,59812L,59813L,59814L, 59815L,59816L,59817L,59818L,59819L,59820L,59821L,59822L,59823L,59824L, 59825L,59826L,59827L,59828L,59829L,59830L,59831L,59832L,59833L,59834L, 59835L,59836L,59837L,59838L,59839L,59840L,59841L,59842L,59843L,59844L, 59845L,59846L,59847L,59848L,59849L,59850L,59851L,59852L,59853L,59854L, 59855L,59856L,59857L,59858L,59859L,59860L,59861L,59862L,59863L,59864L, 59865L,59866L,59867L,59868L,59869L,59870L,59871L,59872L,59873L,59874L, 59875L,59876L,59877L,59878L,59879L,59880L,59881L,59882L,59883L,59884L, 59885L,59886L,59887L,59888L,59889L,59890L,59891L,59892L,59893L,59894L, 59895L,59896L,59897L,59898L,59899L,59900L,59901L,59902L,59903L,59904L, 59905L,59906L,59907L,59908L,59909L,59910L,59911L,59912L,59913L,59914L, 59915L,59916L,59917L,59918L,59919L,59920L,59921L,59922L,59923L,59924L, 59925L,59926L,59927L,59928L,59929L,59930L,59931L,59932L,59933L,59934L, 59935L,59936L,59937L,59938L,59939L,59940L,59941L,59942L,59943L,59944L, 59945L,59946L,59947L,59948L,59949L,59950L,59951L,59952L,59953L,59954L, 59955L,59956L,59957L,59958L,59959L,59960L,59961L,59962L,59963L,59964L, 59965L,59966L,59967L,59968L,59969L,59970L,59971L,59972L,59973L,59974L, 59975L,59976L,59977L,59978L,59979L,59980L,59981L,59982L,59983L,59984L, 59985L,59986L,59987L,59988L,59989L,59990L,59991L,59992L,59993L,59994L, 59995L,59996L,59997L,59998L,59999L,60000L,60001L,60002L,60003L,60004L, 60005L,60006L,60007L,60008L,60009L,60010L,60011L,60012L,60013L,60014L, 60015L,60016L,60017L,60018L,60019L,60020L,60021L,60022L,60023L,60024L, 60025L,60026L,60027L,60028L,60029L,60030L,60031L,60032L,60033L,60034L, 60035L,60036L,60037L,60038L,60039L,60040L,60041L,60042L,60043L,60044L, 60045L,60046L,60047L,60048L,60049L,60050L,60051L,60052L,60053L,60054L, 60055L,60056L,60057L,60058L,60059L,60060L,60061L,60062L,60063L,60064L, 60065L,60066L,60067L,60068L,60069L,60070L,60071L,60072L,60073L,60074L, 60075L,60076L,60077L,60078L,60079L,60080L,60081L,60082L,60083L,60084L, 60085L,60086L,60087L,60088L,60089L,60090L,60091L,60092L,60093L,60094L, 60095L,60096L,60097L,60098L,60099L,60100L,60101L,60102L,60103L,60104L, 60105L,60106L,60107L,60108L,60109L,60110L,60111L,60112L,60113L,60114L, 60115L,60116L,60117L,60118L,60119L,60120L,60121L,60122L,60123L,60124L, 60125L,60126L,60127L,60128L,60129L,60130L,60131L,60132L,60133L,60134L, 60135L,60136L,60137L,60138L,60139L,60140L,60141L,60142L,60143L,60144L, 60145L,60146L,60147L,60148L,60149L,60150L,60151L,60152L,60153L,60154L, 60155L,60156L,60157L,60158L,60159L,60160L,60161L,60162L,60163L,60164L, 60165L,60166L,60167L,60168L,60169L,60170L,60171L,60172L,60173L,60174L, 60175L,60176L,60177L,60178L,60179L,60180L,60181L,60182L,60183L,60184L, 60185L,60186L,60187L,60188L,60189L,60190L,60191L,60192L,60193L,60194L, 60195L,60196L,60197L,60198L,60199L,60200L,60201L,60202L,60203L,60204L, 60205L,60206L,60207L,60208L,60209L,60210L,60211L,60212L,60213L,60214L, 60215L,60216L,60217L,60218L,60219L,60220L,60221L,60222L,60223L,60224L, 60225L,60226L,60227L,60228L,60229L,60230L,60231L,60232L,60233L,60234L, 60235L,60236L,60237L,60238L,60239L,60240L,60241L,60242L,60243L,60244L, 60245L,60246L,60247L,60248L,60249L,60250L,60251L,60252L,60253L,60254L, 60255L,60256L,60257L,60258L,60259L,60260L,60261L,60262L,60263L,60264L, 60265L,60266L,60267L,60268L,60269L,60270L,60271L,60272L,60273L,60274L, 60275L,60276L,60277L,60278L,60279L,60280L,60281L,60282L,60283L,60284L, 60285L,60286L,60287L,60288L,60289L,60290L,60291L,60292L,60293L,60294L, 60295L,60296L,60297L,60298L,60299L,60300L,60301L,60302L,60303L,60304L, 60305L,60306L,60307L,60308L,60309L,60310L,60311L,60312L,60313L,60314L, 60315L,60316L,60317L,60318L,60319L,60320L,60321L,60322L,60323L,60324L, 60325L,60326L,60327L,60328L,60329L,60330L,60331L,60332L,60333L,60334L, 60335L,60336L,60337L,60338L,60339L,60340L,60341L,60342L,60343L,60344L, 60345L,60346L,60347L,60348L,60349L,60350L,60351L,60352L,60353L,60354L, 60355L,60356L,60357L,60358L,60359L,60360L,60361L,60362L,60363L,60364L, 60365L,60366L,60367L,60368L,60369L,60370L,60371L,60372L,60373L,60374L, 60375L,60376L,60377L,60378L,60379L,60380L,60381L,60382L,60383L,60384L, 60385L,60386L,60387L,60388L,60389L,60390L,60391L,60392L,60393L,60394L, 60395L,60396L,60397L,60398L,60399L,60400L,60401L,60402L,60403L,60404L, 60405L,60406L,60407L,60408L,60409L,60410L,60411L,60412L,60413L,60414L, 60415L,60416L,60417L,60418L,60419L,60420L,60421L,60422L,60423L,60424L, 60425L,60426L,60427L,60428L,60429L,60430L,60431L,60432L,60433L,60434L, 60435L,60436L,60437L,60438L,60439L,60440L,60441L,60442L,60443L,60444L, 60445L,60446L,60447L,60448L,60449L,60450L,60451L,60452L,60453L,60454L, 60455L,60456L,60457L,60458L,60459L,60460L,60461L,60462L,60463L,60464L, 60465L,60466L,60467L,60468L,60469L,60470L,60471L,60472L,60473L,60474L, 60475L,60476L,60477L,60478L,60479L,60480L,60481L,60482L,60483L,60484L, 60485L,60486L,60487L,60488L,60489L,60490L,60491L,60492L,60493L,60494L, 60495L,60496L,60497L,60498L,60499L,60500L,60501L,60502L,60503L,60504L, 60505L,60506L,60507L,60508L,60509L,60510L,60511L,60512L,60513L,60514L, 60515L,60516L,60517L,60518L,60519L,60520L,60521L,60522L,60523L,60524L, 60525L,60526L,60527L,60528L,60529L,60530L,60531L,60532L,60533L,60534L, 60535L,60536L,60537L,60538L,60539L,60540L,60541L,60542L,60543L,60544L, 60545L,60546L,60547L,60548L,60549L,60550L,60551L,60552L,60553L,60554L, 60555L,60556L,60557L,60558L,60559L,60560L,60561L,60562L,60563L,60564L, 60565L,60566L,60567L,60568L,60569L,60570L,60571L,60572L,60573L,60574L, 60575L,60576L,60577L,60578L,60579L,60580L,60581L,60582L,60583L,60584L, 60585L,60586L,60587L,60588L,60589L,60590L,60591L,60592L,60593L,60594L, 60595L,60596L,60597L,60598L,60599L,60600L,60601L,60602L,60603L,60604L, 60605L,60606L,60607L,60608L,60609L,60610L,60611L,60612L,60613L,60614L, 60615L,60616L,60617L,60618L,60619L,60620L,60621L,60622L,60623L,60624L, 60625L,60626L,60627L,60628L,60629L,60630L,60631L,60632L,60633L,60634L, 60635L,60636L,60637L,60638L,60639L,60640L,60641L,60642L,60643L,60644L, 60645L,60646L,60647L,60648L,60649L,60650L,60651L,60652L,60653L,60654L, 60655L,60656L,60657L,60658L,60659L,60660L,60661L,60662L,60663L,60664L, 60665L,60666L,60667L,60668L,60669L,60670L,60671L,60672L,60673L,60674L, 60675L,60676L,60677L,60678L,60679L,60680L,60681L,60682L,60683L,60684L, 60685L,60686L,60687L,60688L,60689L,60690L,60691L,60692L,60693L,60694L, 60695L,60696L,60697L,60698L,60699L,60700L,60701L,60702L,60703L,60704L, 60705L,60706L,60707L,60708L,60709L,60710L,60711L,60712L,60713L,60714L, 60715L,60716L,60717L,60718L,60719L,60720L,60721L,60722L,60723L,60724L, 60725L,60726L,60727L,60728L,60729L,60730L,60731L,60732L,60733L,60734L, 60735L,60736L,60737L,60738L,60739L,60740L,60741L,60742L,60743L,60744L, 60745L,60746L,60747L,60748L,60749L,60750L,60751L,60752L,60753L,60754L, 60755L,60756L,60757L,60758L,60759L,60760L,60761L,60762L,60763L,60764L, 60765L,60766L,60767L,60768L,60769L,60770L,60771L,60772L,60773L,60774L, 60775L,60776L,60777L,60778L,60779L,60780L,60781L,60782L,60783L,60784L, 60785L,60786L,60787L,60788L,60789L,60790L,60791L,60792L,60793L,60794L, 60795L,60796L,60797L,60798L,60799L,60800L,60801L,60802L,60803L,60804L, 60805L,60806L,60807L,60808L,60809L,60810L,60811L,60812L,60813L,60814L, 60815L,60816L,60817L,60818L,60819L,60820L,60821L,60822L,60823L,60824L, 60825L,60826L,60827L,60828L,60829L,60830L,60831L,60832L,60833L,60834L, 60835L,60836L,60837L,60838L,60839L,60840L,60841L,60842L,60843L,60844L, 60845L,60846L,60847L,60848L,60849L,60850L,60851L,60852L,60853L,60854L, 60855L,60856L,60857L,60858L,60859L,60860L,60861L,60862L,60863L,60864L, 60865L,60866L,60867L,60868L,60869L,60870L,60871L,60872L,60873L,60874L, 60875L,60876L,60877L,60878L,60879L,60880L,60881L,60882L,60883L,60884L, 60885L,60886L,60887L,60888L,60889L,60890L,60891L,60892L,60893L,60894L, 60895L,60896L,60897L,60898L,60899L,60900L,60901L,60902L,60903L,60904L, 60905L,60906L,60907L,60908L,60909L,60910L,60911L,60912L,60913L,60914L, 60915L,60916L,60917L,60918L,60919L,60920L,60921L,60922L,60923L,60924L, 60925L,60926L,60927L,60928L,60929L,60930L,60931L,60932L,60933L,60934L, 60935L,60936L,60937L,60938L,60939L,60940L,60941L,60942L,60943L,60944L, 60945L,60946L,60947L,60948L,60949L,60950L,60951L,60952L,60953L,60954L, 60955L,60956L,60957L,60958L,60959L,60960L,60961L,60962L,60963L,60964L, 60965L,60966L,60967L,60968L,60969L,60970L,60971L,60972L,60973L,60974L, 60975L,60976L,60977L,60978L,60979L,60980L,60981L,60982L,60983L,60984L, 60985L,60986L,60987L,60988L,60989L,60990L,60991L,60992L,60993L,60994L, 60995L,60996L,60997L,60998L,60999L,61000L,61001L,61002L,61003L,61004L, 61005L,61006L,61007L,61008L,61009L,61010L,61011L,61012L,61013L,61014L, 61015L,61016L,61017L,61018L,61019L,61020L,61021L,61022L,61023L,61024L, 61025L,61026L,61027L,61028L,61029L,61030L,61031L,61032L,61033L,61034L, 61035L,61036L,61037L,61038L,61039L,61040L,61041L,61042L,61043L,61044L, 61045L,61046L,61047L,61048L,61049L,61050L,61051L,61052L,61053L,61054L, 61055L,61056L,61057L,61058L,61059L,61060L,61061L,61062L,61063L,61064L, 61065L,61066L,61067L,61068L,61069L,61070L,61071L,61072L,61073L,61074L, 61075L,61076L,61077L,61078L,61079L,61080L,61081L,61082L,61083L,61084L, 61085L,61086L,61087L,61088L,61089L,61090L,61091L,61092L,61093L,61094L, 61095L,61096L,61097L,61098L,61099L,61100L,61101L,61102L,61103L,61104L, 61105L,61106L,61107L,61108L,61109L,61110L,61111L,61112L,61113L,61114L, 61115L,61116L,61117L,61118L,61119L,61120L,61121L,61122L,61123L,61124L, 61125L,61126L,61127L,61128L,61129L,61130L,61131L,61132L,61133L,61134L, 61135L,61136L,61137L,61138L,61139L,61140L,61141L,61142L,61143L,61144L, 61145L,61146L,61147L,61148L,61149L,61150L,61151L,61152L,61153L,61154L, 61155L,61156L,61157L,61158L,61159L,61160L,61161L,61162L,61163L,61164L, 61165L,61166L,61167L,61168L,61169L,61170L,61171L,61172L,61173L,61174L, 61175L,61176L,61177L,61178L,61179L,61180L,61181L,61182L,61183L,61184L, 61185L,61186L,61187L,61188L,61189L,61190L,61191L,61192L,61193L,61194L, 61195L,61196L,61197L,61198L,61199L,61200L,61201L,61202L,61203L,61204L, 61205L,61206L,61207L,61208L,61209L,61210L,61211L,61212L,61213L,61214L, 61215L,61216L,61217L,61218L,61219L,61220L,61221L,61222L,61223L,61224L, 61225L,61226L,61227L,61228L,61229L,61230L,61231L,61232L,61233L,61234L, 61235L,61236L,61237L,61238L,61239L,61240L,61241L,61242L,61243L,61244L, 61245L,61246L,61247L,61248L,61249L,61250L,61251L,61252L,61253L,61254L, 61255L,61256L,61257L,61258L,61259L,61260L,61261L,61262L,61263L,61264L, 61265L,61266L,61267L,61268L,61269L,61270L,61271L,61272L,61273L,61274L, 61275L,61276L,61277L,61278L,61279L,61280L,61281L,61282L,61283L,61284L, 61285L,61286L,61287L,61288L,61289L,61290L,61291L,61292L,61293L,61294L, 61295L,61296L,61297L,61298L,61299L,61300L,61301L,61302L,61303L,61304L, 61305L,61306L,61307L,61308L,61309L,61310L,61311L,61312L,61313L,61314L, 61315L,61316L,61317L,61318L,61319L,61320L,61321L,61322L,61323L,61324L, 61325L,61326L,61327L,61328L,61329L,61330L,61331L,61332L,61333L,61334L, 61335L,61336L,61337L,61338L,61339L,61340L,61341L,61342L,61343L,61344L, 61345L,61346L,61347L,61348L,61349L,61350L,61351L,61352L,61353L,61354L, 61355L,61356L,61357L,61358L,61359L,61360L,61361L,61362L,61363L,61364L, 61365L,61366L,61367L,61368L,61369L,61370L,61371L,61372L,61373L,61374L, 61375L,61376L,61377L,61378L,61379L,61380L,61381L,61382L,61383L,61384L, 61385L,61386L,61387L,61388L,61389L,61390L,61391L,61392L,61393L,61394L, 61395L,61396L,61397L,61398L,61399L,61400L,61401L,61402L,61403L,61404L, 61405L,61406L,61407L,61408L,61409L,61410L,61411L,61412L,61413L,61414L, 61415L,61416L,61417L,61418L,61419L,61420L,61421L,61422L,61423L,61424L, 61425L,61426L,61427L,61428L,61429L,61430L,61431L,61432L,61433L,61434L, 61435L,61436L,61437L,61438L,61439L,61440L,61441L,61442L,61443L,61444L, 61445L,61446L,61447L,61448L,61449L,61450L,61451L,61452L,61453L,61454L, 61455L,61456L,61457L,61458L,61459L,61460L,61461L,61462L,61463L,61464L, 61465L,61466L,61467L,61468L,61469L,61470L,61471L,61472L,61473L,61474L, 61475L,61476L,61477L,61478L,61479L,61480L,61481L,61482L,61483L,61484L, 61485L,61486L,61487L,61488L,61489L,61490L,61491L,61492L,61493L,61494L, 61495L,61496L,61497L,61498L,61499L,61500L,61501L,61502L,61503L,61504L, 61505L,61506L,61507L,61508L,61509L,61510L,61511L,61512L,61513L,61514L, 61515L,61516L,61517L,61518L,61519L,61520L,61521L,61522L,61523L,61524L, 61525L,61526L,61527L,61528L,61529L,61530L,61531L,61532L,61533L,61534L, 61535L,61536L,61537L,61538L,61539L,61540L,61541L,61542L,61543L,61544L, 61545L,61546L,61547L,61548L,61549L,61550L,61551L,61552L,61553L,61554L, 61555L,61556L,61557L,61558L,61559L,61560L,61561L,61562L,61563L,61564L, 61565L,61566L,61567L,61568L,61569L,61570L,61571L,61572L,61573L,61574L, 61575L,61576L,61577L,61578L,61579L,61580L,61581L,61582L,61583L,61584L, 61585L,61586L,61587L,61588L,61589L,61590L,61591L,61592L,61593L,61594L, 61595L,61596L,61597L,61598L,61599L,61600L,61601L,61602L,61603L,61604L, 61605L,61606L,61607L,61608L,61609L,61610L,61611L,61612L,61613L,61614L, 61615L,61616L,61617L,61618L,61619L,61620L,61621L,61622L,61623L,61624L, 61625L,61626L,61627L,61628L,61629L,61630L,61631L,61632L,61633L,61634L, 61635L,61636L,61637L,61638L,61639L,61640L,61641L,61642L,61643L,61644L, 61645L,61646L,61647L,61648L,61649L,61650L,61651L,61652L,61653L,61654L, 61655L,61656L,61657L,61658L,61659L,61660L,61661L,61662L,61663L,61664L, 61665L,61666L,61667L,61668L,61669L,61670L,61671L,61672L,61673L,61674L, 61675L,61676L,61677L,61678L,61679L,61680L,61681L,61682L,61683L,61684L, 61685L,61686L,61687L,61688L,61689L,61690L,61691L,61692L,61693L,61694L, 61695L,61696L,61697L,61698L,61699L,61700L,61701L,61702L,61703L,61704L, 61705L,61706L,61707L,61708L,61709L,61710L,61711L,61712L,61713L,61714L, 61715L,61716L,61717L,61718L,61719L,61720L,61721L,61722L,61723L,61724L, 61725L,61726L,61727L,61728L,61729L,61730L,61731L,61732L,61733L,61734L, 61735L,61736L,61737L,61738L,61739L,61740L,61741L,61742L,61743L,61744L, 61745L,61746L,61747L,61748L,61749L,61750L,61751L,61752L,61753L,61754L, 61755L,61756L,61757L,61758L,61759L,61760L,61761L,61762L,61763L,61764L, 61765L,61766L,61767L,61768L,61769L,61770L,61771L,61772L,61773L,61774L, 61775L,61776L,61777L,61778L,61779L,61780L,61781L,61782L,61783L,61784L, 61785L,61786L,61787L,61788L,61789L,61790L,61791L,61792L,61793L,61794L, 61795L,61796L,61797L,61798L,61799L,61800L,61801L,61802L,61803L,61804L, 61805L,61806L,61807L,61808L,61809L,61810L,61811L,61812L,61813L,61814L, 61815L,61816L,61817L,61818L,61819L,61820L,61821L,61822L,61823L,61824L, 61825L,61826L,61827L,61828L,61829L,61830L,61831L,61832L,61833L,61834L, 61835L,61836L,61837L,61838L,61839L,61840L,61841L,61842L,61843L,61844L, 61845L,61846L,61847L,61848L,61849L,61850L,61851L,61852L,61853L,61854L, 61855L,61856L,61857L,61858L,61859L,61860L,61861L,61862L,61863L,61864L, 61865L,61866L,61867L,61868L,61869L,61870L,61871L,61872L,61873L,61874L, 61875L,61876L,61877L,61878L,61879L,61880L,61881L,61882L,61883L,61884L, 61885L,61886L,61887L,61888L,61889L,61890L,61891L,61892L,61893L,61894L, 61895L,61896L,61897L,61898L,61899L,61900L,61901L,61902L,61903L,61904L, 61905L,61906L,61907L,61908L,61909L,61910L,61911L,61912L,61913L,61914L, 61915L,61916L,61917L,61918L,61919L,61920L,61921L,61922L,61923L,61924L, 61925L,61926L,61927L,61928L,61929L,61930L,61931L,61932L,61933L,61934L, 61935L,61936L,61937L,61938L,61939L,61940L,61941L,61942L,61943L,61944L, 61945L,61946L,61947L,61948L,61949L,61950L,61951L,61952L,61953L,61954L, 61955L,61956L,61957L,61958L,61959L,61960L,61961L,61962L,61963L,61964L, 61965L,61966L,61967L,61968L,61969L,61970L,61971L,61972L,61973L,61974L, 61975L,61976L,61977L,61978L,61979L,61980L,61981L,61982L,61983L,61984L, 61985L,61986L,61987L,61988L,61989L,61990L,61991L,61992L,61993L,61994L, 61995L,61996L,61997L,61998L,61999L,62000L,62001L,62002L,62003L,62004L, 62005L,62006L,62007L,62008L,62009L,62010L,62011L,62012L,62013L,62014L, 62015L,62016L,62017L,62018L,62019L,62020L,62021L,62022L,62023L,62024L, 62025L,62026L,62027L,62028L,62029L,62030L,62031L,62032L,62033L,62034L, 62035L,62036L,62037L,62038L,62039L,62040L,62041L,62042L,62043L,62044L, 62045L,62046L,62047L,62048L,62049L,62050L,62051L,62052L,62053L,62054L, 62055L,62056L,62057L,62058L,62059L,62060L,62061L,62062L,62063L,62064L, 62065L,62066L,62067L,62068L,62069L,62070L,62071L,62072L,62073L,62074L, 62075L,62076L,62077L,62078L,62079L,62080L,62081L,62082L,62083L,62084L, 62085L,62086L,62087L,62088L,62089L,62090L,62091L,62092L,62093L,62094L, 62095L,62096L,62097L,62098L,62099L,62100L,62101L,62102L,62103L,62104L, 62105L,62106L,62107L,62108L,62109L,62110L,62111L,62112L,62113L,62114L, 62115L,62116L,62117L,62118L,62119L,62120L,62121L,62122L,62123L,62124L, 62125L,62126L,62127L,62128L,62129L,62130L,62131L,62132L,62133L,62134L, 62135L,62136L,62137L,62138L,62139L,62140L,62141L,62142L,62143L,62144L, 62145L,62146L,62147L,62148L,62149L,62150L,62151L,62152L,62153L,62154L, 62155L,62156L,62157L,62158L,62159L,62160L,62161L,62162L,62163L,62164L, 62165L,62166L,62167L,62168L,62169L,62170L,62171L,62172L,62173L,62174L, 62175L,62176L,62177L,62178L,62179L,62180L,62181L,62182L,62183L,62184L, 62185L,62186L,62187L,62188L,62189L,62190L,62191L,62192L,62193L,62194L, 62195L,62196L,62197L,62198L,62199L,62200L,62201L,62202L,62203L,62204L, 62205L,62206L,62207L,62208L,62209L,62210L,62211L,62212L,62213L,62214L, 62215L,62216L,62217L,62218L,62219L,62220L,62221L,62222L,62223L,62224L, 62225L,62226L,62227L,62228L,62229L,62230L,62231L,62232L,62233L,62234L, 62235L,62236L,62237L,62238L,62239L,62240L,62241L,62242L,62243L,62244L, 62245L,62246L,62247L,62248L,62249L,62250L,62251L,62252L,62253L,62254L, 62255L,62256L,62257L,62258L,62259L,62260L,62261L,62262L,62263L,62264L, 62265L,62266L,62267L,62268L,62269L,62270L,62271L,62272L,62273L,62274L, 62275L,62276L,62277L,62278L,62279L,62280L,62281L,62282L,62283L,62284L, 62285L,62286L,62287L,62288L,62289L,62290L,62291L,62292L,62293L,62294L, 62295L,62296L,62297L,62298L,62299L,62300L,62301L,62302L,62303L,62304L, 62305L,62306L,62307L,62308L,62309L,62310L,62311L,62312L,62313L,62314L, 62315L,62316L,62317L,62318L,62319L,62320L,62321L,62322L,62323L,62324L, 62325L,62326L,62327L,62328L,62329L,62330L,62331L,62332L,62333L,62334L, 62335L,62336L,62337L,62338L,62339L,62340L,62341L,62342L,62343L,62344L, 62345L,62346L,62347L,62348L,62349L,62350L,62351L,62352L,62353L,62354L, 62355L,62356L,62357L,62358L,62359L,62360L,62361L,62362L,62363L,62364L, 62365L,62366L,62367L,62368L,62369L,62370L,62371L,62372L,62373L,62374L, 62375L,62376L,62377L,62378L,62379L,62380L,62381L,62382L,62383L,62384L, 62385L,62386L,62387L,62388L,62389L,62390L,62391L,62392L,62393L,62394L, 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62675L,62676L,62677L,62678L,62679L,62680L,62681L,62682L,62683L,62684L, 62685L,62686L,62687L,62688L,62689L,62690L,62691L,62692L,62693L,62694L, 62695L,62696L,62697L,62698L,62699L,62700L,62701L,62702L,62703L,62704L, 62705L,62706L,62707L,62708L,62709L,62710L,62711L,62712L,62713L,62714L, 62715L,62716L,62717L,62718L,62719L,62720L,62721L,62722L,62723L,62724L, 62725L,62726L,62727L,62728L,62729L,62730L,62731L,62732L,62733L,62734L, 62735L,62736L,62737L,62738L,62739L,62740L,62741L,62742L,62743L,62744L, 62745L,62746L,62747L,62748L,62749L,62750L,62751L,62752L,62753L,62754L, 62755L,62756L,62757L,62758L,62759L,62760L,62761L,62762L,62763L,62764L, 62765L,62766L,62767L,62768L,62769L,62770L,62771L,62772L,62773L,62774L, 62775L,62776L,62777L,62778L,62779L,62780L,62781L,62782L,62783L,62784L, 62785L,62786L,62787L,62788L,62789L,62790L,62791L,62792L,62793L,62794L, 62795L,62796L,62797L,62798L,62799L,62800L,62801L,62802L,62803L,62804L, 62805L,62806L,62807L,62808L,62809L,62810L,62811L,62812L,62813L,62814L, 62815L,62816L,62817L,62818L,62819L,62820L,62821L,62822L,62823L,62824L, 62825L,62826L,62827L,62828L,62829L,62830L,62831L,62832L,62833L,62834L, 62835L,62836L,62837L,62838L,62839L,62840L,62841L,62842L,62843L,62844L, 62845L,62846L,62847L,62848L,62849L,62850L,62851L,62852L,62853L,62854L, 62855L,62856L,62857L,62858L,62859L,62860L,62861L,62862L,62863L,62864L, 62865L,62866L,62867L,62868L,62869L,62870L,62871L,62872L,62873L,62874L, 62875L,62876L,62877L,62878L,62879L,62880L,62881L,62882L,62883L,62884L, 62885L,62886L,62887L,62888L,62889L,62890L,62891L,62892L,62893L,62894L, 62895L,62896L,62897L,62898L,62899L,62900L,62901L,62902L,62903L,62904L, 62905L,62906L,62907L,62908L,62909L,62910L,62911L,62912L,62913L,62914L, 62915L,62916L,62917L,62918L,62919L,62920L,62921L,62922L,62923L,62924L, 62925L,62926L,62927L,62928L,62929L,62930L,62931L,62932L,62933L,62934L, 62935L,62936L,62937L,62938L,62939L,62940L,62941L,62942L,62943L,62944L, 62945L,62946L,62947L,62948L,62949L,62950L,62951L,62952L,62953L,62954L, 62955L,62956L,62957L,62958L,62959L,62960L,62961L,62962L,62963L,62964L, 62965L,62966L,62967L,62968L,62969L,62970L,62971L,62972L,62973L,62974L, 62975L,62976L,62977L,62978L,62979L,62980L,62981L,62982L,62983L,62984L, 62985L,62986L,62987L,62988L,62989L,62990L,62991L,62992L,62993L,62994L, 62995L,62996L,62997L,62998L,62999L,63000L,63001L,63002L,63003L,63004L, 63005L,63006L,63007L,63008L,63009L,63010L,63011L,63012L,63013L,63014L, 63015L,63016L,63017L,63018L,63019L,63020L,63021L,63022L,63023L,63024L, 63025L,63026L,63027L,63028L,63029L,63030L,63031L,63032L,63033L,63034L, 63035L,63036L,63037L,63038L,63039L,63040L,63041L,63042L,63043L,63044L, 63045L,63046L,63047L,63048L,63049L,63050L,63051L,63052L,63053L,63054L, 63055L,63056L,63057L,63058L,63059L,63060L,63061L,63062L,63063L,63064L, 63065L,63066L,63067L,63068L,63069L,63070L,63071L,63072L,63073L,63074L, 63075L,63076L,63077L,63078L,63079L,63080L,63081L,63082L,63083L,63084L, 63085L,63086L,63087L,63088L,63089L,63090L,63091L,63092L,63093L,63094L, 63095L,63096L,63097L,63098L,63099L,63100L,63101L,63102L,63103L,63104L, 63105L,63106L,63107L,63108L,63109L,63110L,63111L,63112L,63113L,63114L, 63115L,63116L,63117L,63118L,63119L,63120L,63121L,63122L,63123L,63124L, 63125L,63126L,63127L,63128L,63129L,63130L,63131L,63132L,63133L,63134L, 63135L,63136L,63137L,63138L,63139L,63140L,63141L,63142L,63143L,63144L, 63145L,63146L,63147L,63148L,63149L,63150L,63151L,63152L,63153L,63154L, 63155L,63156L,63157L,63158L,63159L,63160L,63161L,63162L,63163L,63164L, 63165L,63166L,63167L,63168L,63169L,63170L,63171L,63172L,63173L,63174L, 63175L,63176L,63177L,63178L,63179L,63180L,63181L,63182L,63183L,63184L, 63185L,63186L,63187L,63188L,63189L,63190L,63191L,63192L,63193L,63194L, 63195L,63196L,63197L,63198L,63199L,63200L,63201L,63202L,63203L,63204L, 63205L,63206L,63207L,63208L,63209L,63210L,63211L,63212L,63213L,63214L, 63215L,63216L,63217L,63218L,63219L,63220L,63221L,63222L,63223L,63224L, 63225L,63226L,63227L,63228L,63229L,63230L,63231L,63232L,63233L,63234L, 63235L,63236L,63237L,63238L,63239L,63240L,63241L,63242L,63243L,63244L, 63245L,63246L,63247L,63248L,63249L,63250L,63251L,63252L,63253L,63254L, 63255L,63256L,63257L,63258L,63259L,63260L,63261L,63262L,63263L,63264L, 63265L,63266L,63267L,63268L,63269L,63270L,63271L,63272L,63273L,63274L, 63275L,63276L,63277L,63278L,63279L,63280L,63281L,63282L,63283L,63284L, 63285L,63286L,63287L,63288L,63289L,63290L,63291L,63292L,63293L,63294L, 63295L,63296L,63297L,63298L,63299L,63300L,63301L,63302L,63303L,63304L, 63305L,63306L,63307L,63308L,63309L,63310L,63311L,63312L,63313L,63314L, 63315L,63316L,63317L,63318L,63319L,63320L,63321L,63322L,63323L,63324L, 63325L,63326L,63327L,63328L,63329L,63330L,63331L,63332L,63333L,63334L, 63335L,63336L,63337L,63338L,63339L,63340L,63341L,63342L,63343L,63344L, 63345L,63346L,63347L,63348L,63349L,63350L,63351L,63352L,63353L,63354L, 63355L,63356L,63357L,63358L,63359L,63360L,63361L,63362L,63363L,63364L, 63365L,63366L,63367L,63368L,63369L,63370L,63371L,63372L,63373L,63374L, 63375L,63376L,63377L,63378L,63379L,63380L,63381L,63382L,63383L,63384L, 63385L,63386L,63387L,63388L,63389L,63390L,63391L,63392L,63393L,63394L, 63395L,63396L,63397L,63398L,63399L,63400L,63401L,63402L,63403L,63404L, 63405L,63406L,63407L,63408L,63409L,63410L,63411L,63412L,63413L,63414L, 63415L,63416L,63417L,63418L,63419L,63420L,63421L,63422L,63423L,63424L, 63425L,63426L,63427L,63428L,63429L,63430L,63431L,63432L,63433L,63434L, 63435L,63436L,63437L,63438L,63439L,63440L,63441L,63442L,63443L,63444L, 63445L,63446L,63447L,63448L,63449L,63450L,63451L,63452L,63453L,63454L, 63455L,63456L,63457L,63458L,63459L,63460L,63461L,63462L,63463L,63464L, 63465L,63466L,63467L,63468L,63469L,63470L,63471L,63472L,63473L,63474L, 63475L,63476L,63477L,63478L,63479L,63480L,63481L,63482L,63483L,63484L, 63485L,63486L,63487L,63488L,63489L,63490L,63491L,63492L,63493L,63494L, 63495L,63496L,63497L,63498L,63499L,63500L,63501L,63502L,63503L,63504L, 63505L,63506L,63507L,63508L,63509L,63510L,63511L,63512L,63513L,63514L, 63515L,63516L,63517L,63518L,63519L,63520L,63521L,63522L,63523L,63524L, 63525L,63526L,63527L,63528L,63529L,63530L,63531L,63532L,63533L,63534L, 63535L,63536L,63537L,63538L,63539L,63540L,63541L,63542L,63543L,63544L, 63545L,63546L,63547L,63548L,63549L,63550L,63551L,63552L,63553L,63554L, 63555L,63556L,63557L,63558L,63559L,63560L,63561L,63562L,63563L,63564L, 63565L,63566L,63567L,63568L,63569L,63570L,63571L,63572L,63573L,63574L, 63575L,63576L,63577L,63578L,63579L,63580L,63581L,63582L,63583L,63584L, 63585L,63586L,63587L,63588L,63589L,63590L,63591L,63592L,63593L,63594L, 63595L,63596L,63597L,63598L,63599L,63600L,63601L,63602L,63603L,63604L, 63605L,63606L,63607L,63608L,63609L,63610L,63611L,63612L,63613L,63614L, 63615L,63616L,63617L,63618L,63619L,63620L,63621L,63622L,63623L,63624L, 63625L,63626L,63627L,63628L,63629L,63630L,63631L,63632L,63633L,63634L, 63635L,63636L,63637L,63638L,63639L,63640L,63641L,63642L,63643L,63644L, 63645L,63646L,63647L,63648L,63649L,63650L,63651L,63652L,63653L,63654L, 63655L,63656L,63657L,63658L,63659L,63660L,63661L,63662L,63663L,63664L, 63665L,63666L,63667L,63668L,63669L,63670L,63671L,63672L,63673L,63674L, 63675L,63676L,63677L,63678L,63679L,63680L,63681L,63682L,63683L,63684L, 63685L,63686L,63687L,63688L,63689L,63690L,63691L,63692L,63693L,63694L, 63695L,63696L,63697L,63698L,63699L,63700L,63701L,63702L,63703L,63704L, 63705L,63706L,63707L,63708L,63709L,63710L,63711L,63712L,63713L,63714L, 63715L,63716L,63717L,63718L,63719L,63720L,63721L,63722L,63723L,63724L, 63725L,63726L,63727L,63728L,63729L,63730L,63731L,63732L,63733L,63734L, 63735L,63736L,63737L,63738L,63739L,63740L,63741L,63742L,63743L,63744L, 63745L,63746L,63747L,63748L,63749L,63750L,63751L,63752L,63753L,63754L, 63755L,63756L,63757L,63758L,63759L,63760L,63761L,63762L,63763L,63764L, 63765L,63766L,63767L,63768L,63769L,63770L,63771L,63772L,63773L,63774L, 63775L,63776L,63777L,63778L,63779L,63780L,63781L,63782L,63783L,63784L, 63785L,63786L,63787L,63788L,63789L,63790L,63791L,63792L,63793L,63794L, 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64075L,64076L,64077L,64078L,64079L,64080L,64081L,64082L,64083L,64084L, 64085L,64086L,64087L,64088L,64089L,64090L,64091L,64092L,64093L,64094L, 64095L,64096L,64097L,64098L,64099L,64100L,64101L,64102L,64103L,64104L, 64105L,64106L,64107L,64108L,64109L,64110L,64111L,64112L,64113L,64114L, 64115L,64116L,64117L,64118L,64119L,64120L,64121L,64122L,64123L,64124L, 64125L,64126L,64127L,64128L,64129L,64130L,64131L,64132L,64133L,64134L, 64135L,64136L,64137L,64138L,64139L,64140L,64141L,64142L,64143L,64144L, 64145L,64146L,64147L,64148L,64149L,64150L,64151L,64152L,64153L,64154L, 64155L,64156L,64157L,64158L,64159L,64160L,64161L,64162L,64163L,64164L, 64165L,64166L,64167L,64168L,64169L,64170L,64171L,64172L,64173L,64174L, 64175L,64176L,64177L,64178L,64179L,64180L,64181L,64182L,64183L,64184L, 64185L,64186L,64187L,64188L,64189L,64190L,64191L,64192L,64193L,64194L, 64195L,64196L,64197L,64198L,64199L,64200L,64201L,64202L,64203L,64204L, 64205L,64206L,64207L,64208L,64209L,64210L,64211L,64212L,64213L,64214L, 64215L,64216L,64217L,64218L,64219L,64220L,64221L,64222L,64223L,64224L, 64225L,64226L,64227L,64228L,64229L,64230L,64231L,64232L,64233L,64234L, 64235L,64236L,64237L,64238L,64239L,64240L,64241L,64242L,64243L,64244L, 64245L,64246L,64247L,64248L,64249L,64250L,64251L,64252L,64253L,64254L, 64255L,64256L,64257L,64258L,64259L,64260L,64261L,64262L,64263L,64264L, 64265L,64266L,64267L,64268L,64269L,64270L,64271L,64272L,64273L,64274L, 64275L,64276L,64277L,64278L,64279L,64280L,64281L,64282L,64283L,64284L, 64285L,64286L,64287L,64288L,64289L,64290L,64291L,64292L,64293L,64294L, 64295L,64296L,64297L,64298L,64299L,64300L,64301L,64302L,64303L,64304L, 64305L,64306L,64307L,64308L,64309L,64310L,64311L,64312L,64313L,64314L, 64315L,64316L,64317L,64318L,64319L,64320L,64321L,64322L,64323L,64324L, 64325L,64326L,64327L,64328L,64329L,64330L,64331L,64332L,64333L,64334L, 64335L,64336L,64337L,64338L,64339L,64340L,64341L,64342L,64343L,64344L, 64345L,64346L,64347L,64348L,64349L,64350L,64351L,64352L,64353L,64354L, 64355L,64356L,64357L,64358L,64359L,64360L,64361L,64362L,64363L,64364L, 64365L,64366L,64367L,64368L,64369L,64370L,64371L,64372L,64373L,64374L, 64375L,64376L,64377L,64378L,64379L,64380L,64381L,64382L,64383L,64384L, 64385L,64386L,64387L,64388L,64389L,64390L,64391L,64392L,64393L,64394L, 64395L,64396L,64397L,64398L,64399L,64400L,64401L,64402L,64403L,64404L, 64405L,64406L,64407L,64408L,64409L,64410L,64411L,64412L,64413L,64414L, 64415L,64416L,64417L,64418L,64419L,64420L,64421L,64422L,64423L,64424L, 64425L,64426L,64427L,64428L,64429L,64430L,64431L,64432L,64433L,64434L, 64435L,64436L,64437L,64438L,64439L,64440L,64441L,64442L,64443L,64444L, 64445L,64446L,64447L,64448L,64449L,64450L,64451L,64452L,64453L,64454L, 64455L,64456L,64457L,64458L,64459L,64460L,64461L,64462L,64463L,64464L, 64465L,64466L,64467L,64468L,64469L,64470L,64471L,64472L,64473L,64474L, 64475L,64476L,64477L,64478L,64479L,64480L,64481L,64482L,64483L,64484L, 64485L,64486L,64487L,64488L,64489L,64490L,64491L,64492L,64493L,64494L, 64495L,64496L,64497L,64498L,64499L,64500L,64501L,64502L,64503L,64504L, 64505L,64506L,64507L,64508L,64509L,64510L,64511L,64512L,64513L,64514L, 64515L,64516L,64517L,64518L,64519L,64520L,64521L,64522L,64523L,64524L, 64525L,64526L,64527L,64528L,64529L,64530L,64531L,64532L,64533L,64534L, 64535L,64536L,64537L,64538L,64539L,64540L,64541L,64542L,64543L,64544L, 64545L,64546L,64547L,64548L,64549L,64550L,64551L,64552L,64553L,64554L, 64555L,64556L,64557L,64558L,64559L,64560L,64561L,64562L,64563L,64564L, 64565L,64566L,64567L,64568L,64569L,64570L,64571L,64572L,64573L,64574L, 64575L,64576L,64577L,64578L,64579L,64580L,64581L,64582L,64583L,64584L, 64585L,64586L,64587L,64588L,64589L,64590L,64591L,64592L,64593L,64594L, 64595L,64596L,64597L,64598L,64599L,64600L,64601L,64602L,64603L,64604L, 64605L,64606L,64607L,64608L,64609L,64610L,64611L,64612L,64613L,64614L, 64615L,64616L,64617L,64618L,64619L,64620L,64621L,64622L,64623L,64624L, 64625L,64626L,64627L,64628L,64629L,64630L,64631L,64632L,64633L,64634L, 64635L,64636L,64637L,64638L,64639L,64640L,64641L,64642L,64643L,64644L, 64645L,64646L,64647L,64648L,64649L,64650L,64651L,64652L,64653L,64654L, 64655L,64656L,64657L,64658L,64659L,64660L,64661L,64662L,64663L,64664L, 64665L,64666L,64667L,64668L,64669L,64670L,64671L,64672L,64673L,64674L, 64675L,64676L,64677L,64678L,64679L,64680L,64681L,64682L,64683L,64684L, 64685L,64686L,64687L,64688L,64689L,64690L,64691L,64692L,64693L,64694L, 64695L,64696L,64697L,64698L,64699L,64700L,64701L,64702L,64703L,64704L, 64705L,64706L,64707L,64708L,64709L,64710L,64711L,64712L,64713L,64714L, 64715L,64716L,64717L,64718L,64719L,64720L,64721L,64722L,64723L,64724L, 64725L,64726L,64727L,64728L,64729L,64730L,64731L,64732L,64733L,64734L, 64735L,64736L,64737L,64738L,64739L,64740L,64741L,64742L,64743L,64744L, 64745L,64746L,64747L,64748L,64749L,64750L,64751L,64752L,64753L,64754L, 64755L,64756L,64757L,64758L,64759L,64760L,64761L,64762L,64763L,64764L, 64765L,64766L,64767L,64768L,64769L,64770L,64771L,64772L,64773L,64774L, 64775L,64776L,64777L,64778L,64779L,64780L,64781L,64782L,64783L,64784L, 64785L,64786L,64787L,64788L,64789L,64790L,64791L,64792L,64793L,64794L, 64795L,64796L,64797L,64798L,64799L,64800L,64801L,64802L,64803L,64804L, 64805L,64806L,64807L,64808L,64809L,64810L,64811L,64812L,64813L,64814L, 64815L,64816L,64817L,64818L,64819L,64820L,64821L,64822L,64823L,64824L, 64825L,64826L,64827L,64828L,64829L,64830L,64831L,64832L,64833L,64834L, 64835L,64836L,64837L,64838L,64839L,64840L,64841L,64842L,64843L,64844L, 64845L,64846L,64847L,64848L,64849L,64850L,64851L,64852L,64853L,64854L, 64855L,64856L,64857L,64858L,64859L,64860L,64861L,64862L,64863L,64864L, 64865L,64866L,64867L,64868L,64869L,64870L,64871L,64872L,64873L,64874L, 64875L,64876L,64877L,64878L,64879L,64880L,64881L,64882L,64883L,64884L, 64885L,64886L,64887L,64888L,64889L,64890L,64891L,64892L,64893L,64894L, 64895L,64896L,64897L,64898L,64899L,64900L,64901L,64902L,64903L,64904L, 64905L,64906L,64907L,64908L,64909L,64910L,64911L,64912L,64913L,64914L, 64915L,64916L,64917L,64918L,64919L,64920L,64921L,64922L,64923L,64924L, 64925L,64926L,64927L,64928L,64929L,64930L,64931L,64932L,64933L,64934L, 64935L,64936L,64937L,64938L,64939L,64940L,64941L,64942L,64943L,64944L, 64945L,64946L,64947L,64948L,64949L,64950L,64951L,64952L,64953L,64954L, 64955L,64956L,64957L,64958L,64959L,64960L,64961L,64962L,64963L,64964L, 64965L,64966L,64967L,64968L,64969L,64970L,64971L,64972L,64973L,64974L, 64975L,64976L,64977L,64978L,64979L,64980L,64981L,64982L,64983L,64984L, 64985L,64986L,64987L,64988L,64989L,64990L,64991L,64992L,64993L,64994L, 64995L,64996L,64997L,64998L,64999L,65000L,65001L,65002L,65003L,65004L, 65005L,65006L,65007L,65008L,65009L,65010L,65011L,65012L,65013L,65014L, 65015L,65016L,65017L,65018L,65019L,65020L,65021L,65022L,65023L,65024L, 65025L,65026L,65027L,65028L,65029L,65030L,65031L,65032L,65033L,65034L, 65035L,65036L,65037L,65038L,65039L,65040L,65041L,65042L,65043L,65044L, 65045L,65046L,65047L,65048L,65049L,65050L,65051L,65052L,65053L,65054L, 65055L,65056L,65057L,65058L,65059L,65060L,65061L,65062L,65063L,65064L, 65065L,65066L,65067L,65068L,65069L,65070L,65071L,65072L,65073L,65074L, 65075L,65076L,65077L,65078L,65079L,65080L,65081L,65082L,65083L,65084L, 65085L,65086L,65087L,65088L,65089L,65090L,65091L,65092L,65093L,65094L, 65095L,65096L,65097L,65098L,65099L,65100L,65101L,65102L,65103L,65104L, 65105L,65106L,65107L,65108L,65109L,65110L,65111L,65112L,65113L,65114L, 65115L,65116L,65117L,65118L,65119L,65120L,65121L,65122L,65123L,65124L, 65125L,65126L,65127L,65128L,65129L,65130L,65131L,65132L,65133L,65134L, 65135L,65136L,65137L,65138L,65139L,65140L,65141L,65142L,65143L,65144L, 65145L,65146L,65147L,65148L,65149L,65150L,65151L,65152L,65153L,65154L, 65155L,65156L,65157L,65158L,65159L,65160L,65161L,65162L,65163L,65164L, 65165L,65166L,65167L,65168L,65169L,65170L,65171L,65172L,65173L,65174L, 65175L,65176L,65177L,65178L,65179L,65180L,65181L,65182L,65183L,65184L, 65185L,65186L,65187L,65188L,65189L,65190L,65191L,65192L,65193L,65194L, 65195L,65196L,65197L,65198L,65199L,65200L,65201L,65202L,65203L,65204L, 65205L,65206L,65207L,65208L,65209L,65210L,65211L,65212L,65213L,65214L, 65215L,65216L,65217L,65218L,65219L,65220L,65221L,65222L,65223L,65224L, 65225L,65226L,65227L,65228L,65229L,65230L,65231L,65232L,65233L,65234L, 65235L,65236L,65237L,65238L,65239L,65240L,65241L,65242L,65243L,65244L, 65245L,65246L,65247L,65248L,65249L,65250L,65251L,65252L,65253L,65254L, 65255L,65256L,65257L,65258L,65259L,65260L,65261L,65262L,65263L,65264L, 65265L,65266L,65267L,65268L,65269L,65270L,65271L,65272L,65273L,65274L, 65275L,65276L,65277L,65278L,65279L,65280L,65281L,65282L,65283L,65284L, 65285L,65286L,65287L,65288L,65289L,65290L,65291L,65292L,65293L,65294L, 65295L,65296L,65297L,65298L,65299L,65300L,65301L,65302L,65303L,65304L, 65305L,65306L,65307L,65308L,65309L,65310L,65311L,65312L,65313L,65314L, 65315L,65316L,65317L,65318L,65319L,65320L,65321L,65322L,65323L,65324L, 65325L,65326L,65327L,65328L,65329L,65330L,65331L,65332L,65333L,65334L, 65335L,65336L,65337L,65338L,65339L,65340L,65341L,65342L,65343L,65344L, 65313L,65314L,65315L,65316L,65317L,65318L,65319L,65320L,65321L,65322L, 65323L,65324L,65325L,65326L,65327L,65328L,65329L,65330L,65331L,65332L, 65333L,65334L,65335L,65336L,65337L,65338L,65371L,65372L,65373L,65374L, 65375L,65376L,65377L,65378L,65379L,65380L,65381L,65382L,65383L,65384L, 65385L,65386L,65387L,65388L,65389L,65390L,65391L,65392L,65393L,65394L, 65395L,65396L,65397L,65398L,65399L,65400L,65401L,65402L,65403L,65404L, 65405L,65406L,65407L,65408L,65409L,65410L,65411L,65412L,65413L,65414L, 65415L,65416L,65417L,65418L,65419L,65420L,65421L,65422L,65423L,65424L, 65425L,65426L,65427L,65428L,65429L,65430L,65431L,65432L,65433L,65434L, 65435L,65436L,65437L,65438L,65439L,65440L,65441L,65442L,65443L,65444L, 65445L,65446L,65447L,65448L,65449L,65450L,65451L,65452L,65453L,65454L, 65455L,65456L,65457L,65458L,65459L,65460L,65461L,65462L,65463L,65464L, 65465L,65466L,65467L,65468L,65469L,65470L,65471L,65472L,65473L,65474L, 65475L,65476L,65477L,65478L,65479L,65480L,65481L,65482L,65483L,65484L, 65485L,65486L,65487L,65488L,65489L,65490L,65491L,65492L,65493L,65494L, 65495L,65496L,65497L,65498L,65499L,65500L,65501L,65502L,65503L,65504L, 65505L,65506L,65507L,65508L,65509L,65510L,65511L,65512L,65513L,65514L, 65515L,65516L,65517L,65518L,65519L,65520L,65521L,65522L,65523L,65524L, 65525L,65526L,65527L,65528L,65529L,65530L,65531L,65532L,65533L,65534L, 65535L, }; #endif #if defined(DUK_USE_REGEXP_CANON_BITMAP) /* * Automatically generated by extract_caseconv.py, do not edit! */ const duk_uint8_t duk_unicode_re_canon_bitmap[256] = { 23,0,224,19,1,228,255,255,255,255,255,255,255,255,255,255,63,254,255,127, 255,255,255,255,255,255,255,255,231,231,0,16,255,227,255,255,63,255,255, 255,255,255,255,255,1,252,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 227,129,255,255,255,147,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,251, }; #endif /* * Bitstream decoder. */ /* #include duk_internal.h -> already included */ /* Decode 'bits' bits from the input stream (bits must be 1...24). * When reading past bitstream end, zeroes are shifted in. The result * is signed to match duk_bd_decode_flagged. */ DUK_INTERNAL duk_uint32_t duk_bd_decode(duk_bitdecoder_ctx *ctx, duk_small_int_t bits) { duk_small_int_t shift; duk_uint32_t mask; duk_uint32_t tmp; /* Note: cannot read more than 24 bits without possibly shifting top bits out. * Fixable, but adds complexity. */ DUK_ASSERT(bits >= 1 && bits <= 24); while (ctx->currbits < bits) { #if 0 DUK_DDD(DUK_DDDPRINT("decode_bits: shift more data (bits=%ld, currbits=%ld)", (long) bits, (long) ctx->currbits)); #endif ctx->currval <<= 8; if (ctx->offset < ctx->length) { /* If ctx->offset >= ctx->length, we "shift zeroes in" * instead of croaking. */ ctx->currval |= ctx->data[ctx->offset++]; } ctx->currbits += 8; } #if 0 DUK_DDD(DUK_DDDPRINT("decode_bits: bits=%ld, currbits=%ld, currval=0x%08lx", (long) bits, (long) ctx->currbits, (unsigned long) ctx->currval)); #endif /* Extract 'top' bits of currval; note that the extracted bits do not need * to be cleared, we just ignore them on next round. */ shift = ctx->currbits - bits; mask = (((duk_uint32_t) 1U) << bits) - 1U; tmp = (ctx->currval >> shift) & mask; ctx->currbits = shift; /* remaining */ #if 0 DUK_DDD(DUK_DDDPRINT("decode_bits: %ld bits -> 0x%08lx (%ld), currbits=%ld, currval=0x%08lx", (long) bits, (unsigned long) tmp, (long) tmp, (long) ctx->currbits, (unsigned long) ctx->currval)); #endif return tmp; } DUK_INTERNAL duk_small_uint_t duk_bd_decode_flag(duk_bitdecoder_ctx *ctx) { return (duk_small_uint_t) duk_bd_decode(ctx, 1); } /* Decode a one-bit flag, and if set, decode a value of 'bits', otherwise return * default value. */ DUK_INTERNAL duk_uint32_t duk_bd_decode_flagged(duk_bitdecoder_ctx *ctx, duk_small_int_t bits, duk_uint32_t def_value) { if (duk_bd_decode_flag(ctx)) { return duk_bd_decode(ctx, bits); } else { return def_value; } } /* Signed variant, allows negative marker value. */ DUK_INTERNAL duk_int32_t duk_bd_decode_flagged_signed(duk_bitdecoder_ctx *ctx, duk_small_int_t bits, duk_int32_t def_value) { return (duk_int32_t) duk_bd_decode_flagged(ctx, bits, (duk_uint32_t) def_value); } /* Shared varint encoding. Match dukutil.py BitEncode.varuint(). */ DUK_INTERNAL duk_uint32_t duk_bd_decode_varuint(duk_bitdecoder_ctx *ctx) { duk_small_uint_t t; /* The bit encoding choices here are based on manual testing against * the actual varuints generated by genbuiltins.py. */ switch (duk_bd_decode(ctx, 2)) { case 0: return 0; /* [0,0] */ case 1: return duk_bd_decode(ctx, 2) + 1; /* [1,4] */ case 2: return duk_bd_decode(ctx, 5) + 5; /* [5,36] */ default: t = duk_bd_decode(ctx, 7); if (t == 0) { return duk_bd_decode(ctx, 20); } return (t - 1) + 37; /* [37,163] */ } } /* Decode a bit packed string from a custom format used by genbuiltins.py. * This function is here because it's used for both heap and thread inits. * Caller must supply the output buffer whose size is NOT checked! */ #define DUK__BITPACK_LETTER_LIMIT 26 #define DUK__BITPACK_LOOKUP1 26 #define DUK__BITPACK_LOOKUP2 27 #define DUK__BITPACK_SWITCH1 28 #define DUK__BITPACK_SWITCH 29 #define DUK__BITPACK_UNUSED1 30 #define DUK__BITPACK_EIGHTBIT 31 DUK_LOCAL const duk_uint8_t duk__bitpacked_lookup[16] = { DUK_ASC_0, DUK_ASC_1, DUK_ASC_2, DUK_ASC_3, DUK_ASC_4, DUK_ASC_5, DUK_ASC_6, DUK_ASC_7, DUK_ASC_8, DUK_ASC_9, DUK_ASC_UNDERSCORE, DUK_ASC_SPACE, 0x82, 0x80, DUK_ASC_DOUBLEQUOTE, DUK_ASC_LCURLY }; DUK_INTERNAL duk_small_uint_t duk_bd_decode_bitpacked_string(duk_bitdecoder_ctx *bd, duk_uint8_t *out) { duk_small_uint_t len; duk_small_uint_t mode; duk_small_uint_t t; duk_small_uint_t i; len = duk_bd_decode(bd, 5); if (len == 31) { len = duk_bd_decode(bd, 8); /* Support up to 256 bytes; rare. */ } mode = 32; /* 0 = uppercase, 32 = lowercase (= 'a' - 'A') */ for (i = 0; i < len; i++) { t = duk_bd_decode(bd, 5); if (t < DUK__BITPACK_LETTER_LIMIT) { t = t + DUK_ASC_UC_A + mode; } else if (t == DUK__BITPACK_LOOKUP1) { t = duk__bitpacked_lookup[duk_bd_decode(bd, 3)]; } else if (t == DUK__BITPACK_LOOKUP2) { t = duk__bitpacked_lookup[8 + duk_bd_decode(bd, 3)]; } else if (t == DUK__BITPACK_SWITCH1) { t = duk_bd_decode(bd, 5); DUK_ASSERT_DISABLE(t >= 0); /* unsigned */ DUK_ASSERT(t <= 25); t = t + DUK_ASC_UC_A + (mode ^ 32); } else if (t == DUK__BITPACK_SWITCH) { mode = mode ^ 32; t = duk_bd_decode(bd, 5); DUK_ASSERT_DISABLE(t >= 0); DUK_ASSERT(t <= 25); t = t + DUK_ASC_UC_A + mode; } else if (t == DUK__BITPACK_EIGHTBIT) { t = duk_bd_decode(bd, 8); } out[i] = (duk_uint8_t) t; } return len; } /* automatic undefs */ #undef DUK__BITPACK_EIGHTBIT #undef DUK__BITPACK_LETTER_LIMIT #undef DUK__BITPACK_LOOKUP1 #undef DUK__BITPACK_LOOKUP2 #undef DUK__BITPACK_SWITCH #undef DUK__BITPACK_SWITCH1 #undef DUK__BITPACK_UNUSED1 /* * Bitstream encoder. */ /* #include duk_internal.h -> already included */ DUK_INTERNAL void duk_be_encode(duk_bitencoder_ctx *ctx, duk_uint32_t data, duk_small_int_t bits) { duk_uint8_t tmp; DUK_ASSERT(ctx != NULL); DUK_ASSERT(ctx->currbits < 8); /* This limitation would be fixable but adds unnecessary complexity. */ DUK_ASSERT(bits >= 1 && bits <= 24); ctx->currval = (ctx->currval << bits) | data; ctx->currbits += bits; while (ctx->currbits >= 8) { if (ctx->offset < ctx->length) { tmp = (duk_uint8_t) ((ctx->currval >> (ctx->currbits - 8)) & 0xff); ctx->data[ctx->offset++] = tmp; } else { /* If buffer has been exhausted, truncate bitstream */ ctx->truncated = 1; } ctx->currbits -= 8; } } DUK_INTERNAL void duk_be_finish(duk_bitencoder_ctx *ctx) { duk_small_int_t npad; DUK_ASSERT(ctx != NULL); DUK_ASSERT(ctx->currbits < 8); npad = (duk_small_int_t) (8 - ctx->currbits); if (npad > 0) { duk_be_encode(ctx, 0, npad); } DUK_ASSERT(ctx->currbits == 0); } /* * Fast buffer writer with slack management. */ /* #include duk_internal.h -> already included */ /* XXX: Avoid duk_{memcmp,memmove}_unsafe() by imposing a minimum length of * >0 for the underlying dynamic buffer. */ /* * Macro support functions (use only macros in calling code) */ DUK_LOCAL void duk__bw_update_ptrs(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t curr_offset, duk_size_t new_length) { duk_uint8_t *p; DUK_ASSERT(thr != NULL); DUK_ASSERT(bw_ctx != NULL); DUK_UNREF(thr); /* 'p' might be NULL when the underlying buffer is zero size. If so, * the resulting pointers are not used unsafely. */ p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, bw_ctx->buf); DUK_ASSERT(p != NULL || (DUK_HBUFFER_DYNAMIC_GET_SIZE(bw_ctx->buf) == 0 && curr_offset == 0 && new_length == 0)); bw_ctx->p = p + curr_offset; bw_ctx->p_base = p; bw_ctx->p_limit = p + new_length; } DUK_INTERNAL void duk_bw_init(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_hbuffer_dynamic *h_buf) { DUK_ASSERT(thr != NULL); DUK_ASSERT(bw_ctx != NULL); DUK_ASSERT(h_buf != NULL); bw_ctx->buf = h_buf; duk__bw_update_ptrs(thr, bw_ctx, 0, DUK_HBUFFER_DYNAMIC_GET_SIZE(h_buf)); } DUK_INTERNAL void duk_bw_init_pushbuf(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t buf_size) { DUK_ASSERT(thr != NULL); DUK_ASSERT(bw_ctx != NULL); (void) duk_push_dynamic_buffer(thr, buf_size); bw_ctx->buf = (duk_hbuffer_dynamic *) duk_known_hbuffer(thr, -1); DUK_ASSERT(bw_ctx->buf != NULL); duk__bw_update_ptrs(thr, bw_ctx, 0, buf_size); } /* Resize target buffer for requested size. Called by the macro only when the * fast path test (= there is space) fails. */ DUK_INTERNAL duk_uint8_t *duk_bw_resize(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t sz) { duk_size_t curr_off; duk_size_t add_sz; duk_size_t new_sz; DUK_ASSERT(thr != NULL); DUK_ASSERT(bw_ctx != NULL); /* We could do this operation without caller updating bw_ctx->ptr, * but by writing it back here we can share code better. */ curr_off = (duk_size_t) (bw_ctx->p - bw_ctx->p_base); add_sz = (curr_off >> DUK_BW_SLACK_SHIFT) + DUK_BW_SLACK_ADD; new_sz = curr_off + sz + add_sz; if (DUK_UNLIKELY(new_sz < curr_off)) { /* overflow */ DUK_ERROR_RANGE(thr, DUK_STR_BUFFER_TOO_LONG); DUK_WO_NORETURN(return NULL;); } #if 0 /* for manual torture testing: tight allocation, useful with valgrind */ new_sz = curr_off + sz; #endif /* This is important to ensure dynamic buffer data pointer is not * NULL (which is possible if buffer size is zero), which in turn * causes portability issues with e.g. memmove() and memcpy(). */ DUK_ASSERT(new_sz >= 1); DUK_DD(DUK_DDPRINT("resize bufferwriter from %ld to %ld (add_sz=%ld)", (long) curr_off, (long) new_sz, (long) add_sz)); duk_hbuffer_resize(thr, bw_ctx->buf, new_sz); duk__bw_update_ptrs(thr, bw_ctx, curr_off, new_sz); return bw_ctx->p; } /* Make buffer compact, matching current written size. */ DUK_INTERNAL void duk_bw_compact(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx) { duk_size_t len; DUK_ASSERT(thr != NULL); DUK_ASSERT(bw_ctx != NULL); DUK_UNREF(thr); len = (duk_size_t) (bw_ctx->p - bw_ctx->p_base); duk_hbuffer_resize(thr, bw_ctx->buf, len); duk__bw_update_ptrs(thr, bw_ctx, len, len); } DUK_INTERNAL void duk_bw_write_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t src_off, duk_size_t len) { duk_uint8_t *p_base; DUK_ASSERT(thr != NULL); DUK_ASSERT(bw != NULL); DUK_ASSERT(src_off <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(src_off + len <= DUK_BW_GET_SIZE(thr, bw)); DUK_UNREF(thr); p_base = bw->p_base; duk_memcpy_unsafe((void *) bw->p, (const void *) (p_base + src_off), (size_t) len); bw->p += len; } DUK_INTERNAL void duk_bw_write_ensure_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t src_off, duk_size_t len) { DUK_ASSERT(thr != NULL); DUK_ASSERT(bw != NULL); DUK_ASSERT(src_off <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(src_off + len <= DUK_BW_GET_SIZE(thr, bw)); DUK_BW_ENSURE(thr, bw, len); duk_bw_write_raw_slice(thr, bw, src_off, len); } DUK_INTERNAL void duk_bw_insert_raw_bytes(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, const duk_uint8_t *buf, duk_size_t len) { duk_uint8_t *p_base; duk_size_t buf_sz, move_sz; DUK_ASSERT(thr != NULL); DUK_ASSERT(bw != NULL); DUK_ASSERT(dst_off <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(buf != NULL); DUK_UNREF(thr); p_base = bw->p_base; buf_sz = (duk_size_t) (bw->p - p_base); /* constrained by maximum buffer size */ move_sz = buf_sz - dst_off; DUK_ASSERT(p_base != NULL); /* buffer size is >= 1 */ duk_memmove_unsafe((void *) (p_base + dst_off + len), (const void *) (p_base + dst_off), (size_t) move_sz); duk_memcpy_unsafe((void *) (p_base + dst_off), (const void *) buf, (size_t) len); bw->p += len; } DUK_INTERNAL void duk_bw_insert_ensure_bytes(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, const duk_uint8_t *buf, duk_size_t len) { DUK_ASSERT(thr != NULL); DUK_ASSERT(bw != NULL); DUK_ASSERT(dst_off <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(buf != NULL); DUK_BW_ENSURE(thr, bw, len); duk_bw_insert_raw_bytes(thr, bw, dst_off, buf, len); } DUK_INTERNAL void duk_bw_insert_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, duk_size_t src_off, duk_size_t len) { duk_uint8_t *p_base; duk_size_t buf_sz, move_sz; DUK_ASSERT(thr != NULL); DUK_ASSERT(bw != NULL); DUK_ASSERT(dst_off <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(src_off <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(src_off + len <= DUK_BW_GET_SIZE(thr, bw)); DUK_UNREF(thr); p_base = bw->p_base; /* Don't support "straddled" source now. */ DUK_ASSERT(dst_off <= src_off || dst_off >= src_off + len); if (dst_off <= src_off) { /* Target is before source. Source offset is expressed as * a "before change" offset. Account for the memmove. */ src_off += len; } buf_sz = (duk_size_t) (bw->p - p_base); move_sz = buf_sz - dst_off; DUK_ASSERT(p_base != NULL); /* buffer size is >= 1 */ duk_memmove_unsafe((void *) (p_base + dst_off + len), (const void *) (p_base + dst_off), (size_t) move_sz); duk_memcpy_unsafe((void *) (p_base + dst_off), (const void *) (p_base + src_off), (size_t) len); bw->p += len; } DUK_INTERNAL void duk_bw_insert_ensure_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, duk_size_t src_off, duk_size_t len) { DUK_ASSERT(thr != NULL); DUK_ASSERT(bw != NULL); DUK_ASSERT(dst_off <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(src_off <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(src_off + len <= DUK_BW_GET_SIZE(thr, bw)); /* Don't support "straddled" source now. */ DUK_ASSERT(dst_off <= src_off || dst_off >= src_off + len); DUK_BW_ENSURE(thr, bw, len); duk_bw_insert_raw_slice(thr, bw, dst_off, src_off, len); } DUK_INTERNAL duk_uint8_t *duk_bw_insert_raw_area(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len) { duk_uint8_t *p_base, *p_dst, *p_src; duk_size_t buf_sz, move_sz; DUK_ASSERT(thr != NULL); DUK_ASSERT(bw != NULL); DUK_ASSERT(off <= DUK_BW_GET_SIZE(thr, bw)); DUK_UNREF(thr); p_base = bw->p_base; buf_sz = (duk_size_t) (bw->p - p_base); move_sz = buf_sz - off; p_dst = p_base + off + len; p_src = p_base + off; duk_memmove_unsafe((void *) p_dst, (const void *) p_src, (size_t) move_sz); return p_src; /* point to start of 'reserved area' */ } DUK_INTERNAL duk_uint8_t *duk_bw_insert_ensure_area(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len) { DUK_ASSERT(thr != NULL); DUK_ASSERT(bw != NULL); DUK_ASSERT(off <= DUK_BW_GET_SIZE(thr, bw)); DUK_BW_ENSURE(thr, bw, len); return duk_bw_insert_raw_area(thr, bw, off, len); } DUK_INTERNAL void duk_bw_remove_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len) { duk_size_t move_sz; duk_uint8_t *p_base; duk_uint8_t *p_src; duk_uint8_t *p_dst; DUK_ASSERT(thr != NULL); DUK_ASSERT(bw != NULL); DUK_ASSERT(off <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw)); DUK_ASSERT(off + len <= DUK_BW_GET_SIZE(thr, bw)); DUK_UNREF(thr); p_base = bw->p_base; p_dst = p_base + off; p_src = p_dst + len; move_sz = (duk_size_t) (bw->p - p_src); duk_memmove_unsafe((void *) p_dst, (const void *) p_src, (size_t) move_sz); bw->p -= len; } /* * Macro support functions for reading/writing raw data. * * These are done using mempcy to ensure they're valid even for unaligned * reads/writes on platforms where alignment counts. On x86 at least gcc * is able to compile these into a bswap+mov. "Always inline" is used to * ensure these macros compile to minimal code. * * Not really bufwriter related, but currently used together. */ DUK_INTERNAL DUK_ALWAYS_INLINE duk_uint16_t duk_raw_read_u16_be(duk_uint8_t **p) { union { duk_uint8_t b[2]; duk_uint16_t x; } u; duk_memcpy((void *) u.b, (const void *) (*p), (size_t) 2); u.x = DUK_NTOH16(u.x); *p += 2; return u.x; } DUK_INTERNAL DUK_ALWAYS_INLINE duk_uint32_t duk_raw_read_u32_be(duk_uint8_t **p) { union { duk_uint8_t b[4]; duk_uint32_t x; } u; duk_memcpy((void *) u.b, (const void *) (*p), (size_t) 4); u.x = DUK_NTOH32(u.x); *p += 4; return u.x; } DUK_INTERNAL DUK_ALWAYS_INLINE duk_double_t duk_raw_read_double_be(duk_uint8_t **p) { duk_double_union du; union { duk_uint8_t b[4]; duk_uint32_t x; } u; duk_memcpy((void *) u.b, (const void *) (*p), (size_t) 4); u.x = DUK_NTOH32(u.x); du.ui[DUK_DBL_IDX_UI0] = u.x; duk_memcpy((void *) u.b, (const void *) (*p + 4), (size_t) 4); u.x = DUK_NTOH32(u.x); du.ui[DUK_DBL_IDX_UI1] = u.x; *p += 8; return du.d; } DUK_INTERNAL DUK_ALWAYS_INLINE void duk_raw_write_u16_be(duk_uint8_t **p, duk_uint16_t val) { union { duk_uint8_t b[2]; duk_uint16_t x; } u; u.x = DUK_HTON16(val); duk_memcpy((void *) (*p), (const void *) u.b, (size_t) 2); *p += 2; } DUK_INTERNAL DUK_ALWAYS_INLINE void duk_raw_write_u32_be(duk_uint8_t **p, duk_uint32_t val) { union { duk_uint8_t b[4]; duk_uint32_t x; } u; u.x = DUK_HTON32(val); duk_memcpy((void *) (*p), (const void *) u.b, (size_t) 4); *p += 4; } DUK_INTERNAL DUK_ALWAYS_INLINE void duk_raw_write_double_be(duk_uint8_t **p, duk_double_t val) { duk_double_union du; union { duk_uint8_t b[4]; duk_uint32_t x; } u; du.d = val; u.x = du.ui[DUK_DBL_IDX_UI0]; u.x = DUK_HTON32(u.x); duk_memcpy((void *) (*p), (const void *) u.b, (size_t) 4); u.x = du.ui[DUK_DBL_IDX_UI1]; u.x = DUK_HTON32(u.x); duk_memcpy((void *) (*p + 4), (const void *) u.b, (size_t) 4); *p += 8; } /* * Assertion helpers */ #if defined(DUK_USE_ASSERTIONS) DUK_INTERNAL void duk_bw_assert_valid(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx) { DUK_UNREF(thr); DUK_ASSERT(bw_ctx != NULL); DUK_ASSERT(bw_ctx->buf != NULL); DUK_ASSERT((DUK_HBUFFER_DYNAMIC_GET_SIZE(bw_ctx->buf) == 0) || (bw_ctx->p != NULL && bw_ctx->p_base != NULL && bw_ctx->p_limit != NULL && bw_ctx->p_limit >= bw_ctx->p_base && bw_ctx->p >= bw_ctx->p_base && bw_ctx->p <= bw_ctx->p_limit)); } #endif /* * Cast helpers. * * C99+ coercion is challenging portability-wise because out-of-range casts * may invoke implementation defined or even undefined behavior. See e.g. * http://blog.frama-c.com/index.php?post/2013/10/09/Overflow-float-integer. * * Provide explicit cast helpers which try to avoid implementation defined * or undefined behavior. These helpers can then be simplified in the vast * majority of cases where the implementation defined or undefined behavior * is not problematic. */ /* #include duk_internal.h -> already included */ /* Portable double-to-integer cast which avoids undefined behavior and avoids * relying on fmin(), fmax(), or other intrinsics. Out-of-range results are * not assumed by caller, but here value is clamped, NaN converts to minval. */ #define DUK__DOUBLE_INT_CAST1(tname,minval,maxval) do { \ if (DUK_LIKELY(x >= (duk_double_t) (minval))) { \ DUK_ASSERT(!DUK_ISNAN(x)); \ if (DUK_LIKELY(x <= (duk_double_t) (maxval))) { \ return (tname) x; \ } else { \ return (tname) (maxval); \ } \ } else { \ /* NaN or below minval. Since we don't care about the result \ * for out-of-range values, just return the minimum value for \ * both. \ */ \ return (tname) (minval); \ } \ } while (0) /* Rely on specific NaN behavior for duk_double_{fmin,fmax}(): if either * argument is a NaN, return the second argument. This avoids a * NaN-to-integer cast which is undefined behavior. */ #define DUK__DOUBLE_INT_CAST2(tname,minval,maxval) do { \ return (tname) duk_double_fmin(duk_double_fmax(x, (duk_double_t) (minval)), (duk_double_t) (maxval)); \ } while (0) /* Another solution which doesn't need C99+ behavior for fmin() and fmax(). */ #define DUK__DOUBLE_INT_CAST3(tname,minval,maxval) do { \ if (DUK_ISNAN(x)) { \ /* 0 or any other value is fine. */ \ return (tname) 0; \ } else \ return (tname) DUK_FMIN(DUK_FMAX(x, (duk_double_t) (minval)), (duk_double_t) (maxval)); \ } \ } while (0) /* C99+ solution: relies on specific fmin() and fmax() behavior in C99: if * one argument is NaN but the other isn't, the non-NaN argument is returned. * Because the limits are non-NaN values, explicit NaN check is not needed. * This may not work on all legacy platforms, and also doesn't seem to inline * the fmin() and fmax() calls (unless one uses -ffast-math which we don't * support). */ #define DUK__DOUBLE_INT_CAST4(tname,minval,maxval) do { \ return (tname) DUK_FMIN(DUK_FMAX(x, (duk_double_t) (minval)), (duk_double_t) (maxval)); \ } while (0) DUK_INTERNAL duk_int_t duk_double_to_int_t(duk_double_t x) { #if defined(DUK_USE_ALLOW_UNDEFINED_BEHAVIOR) /* Real world solution: almost any practical platform will provide * an integer value without any guarantees what it is (which is fine). */ return (duk_int_t) x; #else DUK__DOUBLE_INT_CAST1(duk_int_t, DUK_INT_MIN, DUK_INT_MAX); #endif } DUK_INTERNAL duk_uint_t duk_double_to_uint_t(duk_double_t x) { #if defined(DUK_USE_ALLOW_UNDEFINED_BEHAVIOR) return (duk_uint_t) x; #else DUK__DOUBLE_INT_CAST1(duk_uint_t, DUK_UINT_MIN, DUK_UINT_MAX); #endif } DUK_INTERNAL duk_int32_t duk_double_to_int32_t(duk_double_t x) { #if defined(DUK_USE_ALLOW_UNDEFINED_BEHAVIOR) return (duk_int32_t) x; #else DUK__DOUBLE_INT_CAST1(duk_int32_t, DUK_INT32_MIN, DUK_INT32_MAX); #endif } DUK_INTERNAL duk_uint32_t duk_double_to_uint32_t(duk_double_t x) { #if defined(DUK_USE_ALLOW_UNDEFINED_BEHAVIOR) return (duk_uint32_t) x; #else DUK__DOUBLE_INT_CAST1(duk_uint32_t, DUK_UINT32_MIN, DUK_UINT32_MAX); #endif } /* Largest IEEE double that doesn't round to infinity in the default rounding * mode. The exact midpoint between (1 - 2^(-24)) * 2^128 and 2^128 rounds to * infinity, at least on x64. This number is one double unit below that * midpoint. See misc/float_cast.c. */ #define DUK__FLOAT_ROUND_LIMIT 340282356779733623858607532500980858880.0 /* Maximum IEEE float. Double-to-float conversion above this would be out of * range and thus technically undefined behavior. */ #define DUK__FLOAT_MAX 340282346638528859811704183484516925440.0 DUK_INTERNAL duk_float_t duk_double_to_float_t(duk_double_t x) { /* Even a double-to-float cast is technically undefined behavior if * the double is out-of-range. C99 Section 6.3.1.5: * * If the value being converted is in the range of values that can * be represented but cannot be represented exactly, the result is * either the nearest higher or nearest lower representable value, * chosen in an implementation-defined manner. If the value being * converted is outside the range of values that can be represented, * the behavior is undefined. */ #if defined(DUK_USE_ALLOW_UNDEFINED_BEHAVIOR) return (duk_float_t) x; #else duk_double_t t; t = DUK_FABS(x); DUK_ASSERT((DUK_ISNAN(x) && DUK_ISNAN(t)) || (!DUK_ISNAN(x) && !DUK_ISNAN(t))); if (DUK_LIKELY(t <= DUK__FLOAT_MAX)) { /* Standard in-range case, try to get here with a minimum * number of checks and branches. */ DUK_ASSERT(!DUK_ISNAN(x)); return (duk_float_t) x; } else if (t <= DUK__FLOAT_ROUND_LIMIT) { /* Out-of-range, but rounds to min/max float. */ DUK_ASSERT(!DUK_ISNAN(x)); if (x < 0.0) { return (duk_float_t) -DUK__FLOAT_MAX; } else { return (duk_float_t) DUK__FLOAT_MAX; } } else if (DUK_ISNAN(x)) { /* Assumes double NaN -> float NaN considered "in range". */ DUK_ASSERT(DUK_ISNAN(x)); return (duk_float_t) x; } else { /* Out-of-range, rounds to +/- Infinity. */ if (x < 0.0) { return (duk_float_t) -DUK_DOUBLE_INFINITY; } else { return (duk_float_t) DUK_DOUBLE_INFINITY; } } #endif } /* automatic undefs */ #undef DUK__DOUBLE_INT_CAST1 #undef DUK__DOUBLE_INT_CAST2 #undef DUK__DOUBLE_INT_CAST3 #undef DUK__DOUBLE_INT_CAST4 #undef DUK__FLOAT_MAX #undef DUK__FLOAT_ROUND_LIMIT /* * IEEE double helpers. */ /* #include duk_internal.h -> already included */ DUK_INTERNAL duk_bool_t duk_double_is_anyinf(duk_double_t x) { duk_double_union du; du.d = x; return DUK_DBLUNION_IS_ANYINF(&du); } DUK_INTERNAL duk_bool_t duk_double_is_posinf(duk_double_t x) { duk_double_union du; du.d = x; return DUK_DBLUNION_IS_POSINF(&du); } DUK_INTERNAL duk_bool_t duk_double_is_neginf(duk_double_t x) { duk_double_union du; du.d = x; return DUK_DBLUNION_IS_NEGINF(&du); } DUK_INTERNAL duk_bool_t duk_double_is_nan(duk_double_t x) { duk_double_union du; du.d = x; /* Assumes we're dealing with a Duktape internal NaN which is * NaN normalized if duk_tval requires it. */ DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du)); return DUK_DBLUNION_IS_NAN(&du); } DUK_INTERNAL duk_bool_t duk_double_is_nan_or_zero(duk_double_t x) { duk_double_union du; du.d = x; /* Assumes we're dealing with a Duktape internal NaN which is * NaN normalized if duk_tval requires it. */ DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du)); return DUK_DBLUNION_IS_NAN(&du) || DUK_DBLUNION_IS_ANYZERO(&du); } DUK_INTERNAL duk_bool_t duk_double_is_nan_or_inf(duk_double_t x) { duk_double_union du; du.d = x; /* If exponent is 0x7FF the argument is either a NaN or an * infinity. We don't need to check any other fields. */ #if defined(DUK_USE_64BIT_OPS) #if defined(DUK_USE_DOUBLE_ME) return (du.ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x000000007ff00000)) == DUK_U64_CONSTANT(0x000000007ff00000); #else return (du.ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x7ff0000000000000)) == DUK_U64_CONSTANT(0x7ff0000000000000); #endif #else return (du.ui[DUK_DBL_IDX_UI0] & 0x7ff00000UL) == 0x7ff00000UL; #endif } DUK_INTERNAL duk_bool_t duk_double_is_nan_zero_inf(duk_double_t x) { duk_double_union du; #if defined(DUK_USE_64BIT_OPS) duk_uint64_t t; #else duk_uint32_t t; #endif du.d = x; #if defined(DUK_USE_64BIT_OPS) #if defined(DUK_USE_DOUBLE_ME) t = du.ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x000000007ff00000); if (t == DUK_U64_CONSTANT(0x0000000000000000)) { t = du.ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x0000000080000000); return t == 0; } if (t == DUK_U64_CONSTANT(0x000000007ff00000)) { return 1; } #else t = du.ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x7ff0000000000000); if (t == DUK_U64_CONSTANT(0x0000000000000000)) { t = du.ull[DUK_DBL_IDX_ULL0] & DUK_U64_CONSTANT(0x8000000000000000); return t == 0; } if (t == DUK_U64_CONSTANT(0x7ff0000000000000)) { return 1; } #endif #else t = du.ui[DUK_DBL_IDX_UI0] & 0x7ff00000UL; if (t == 0x00000000UL) { return DUK_DBLUNION_IS_ANYZERO(&du); } if (t == 0x7ff00000UL) { return 1; } #endif return 0; } DUK_INTERNAL duk_small_uint_t duk_double_signbit(duk_double_t x) { duk_double_union du; du.d = x; return (duk_small_uint_t) DUK_DBLUNION_GET_SIGNBIT(&du); } DUK_INTERNAL duk_double_t duk_double_trunc_towards_zero(duk_double_t x) { /* XXX: optimize */ duk_small_uint_t s = duk_double_signbit(x); x = DUK_FLOOR(DUK_FABS(x)); /* truncate towards zero */ if (s) { x = -x; } return x; } DUK_INTERNAL duk_bool_t duk_double_same_sign(duk_double_t x, duk_double_t y) { duk_double_union du1; duk_double_union du2; du1.d = x; du2.d = y; return (((du1.ui[DUK_DBL_IDX_UI0] ^ du2.ui[DUK_DBL_IDX_UI0]) & 0x80000000UL) == 0); } DUK_INTERNAL duk_double_t duk_double_fmin(duk_double_t x, duk_double_t y) { /* Doesn't replicate fmin() behavior exactly: for fmin() if one * argument is a NaN, the other argument should be returned. * Duktape doesn't rely on this behavior so the replacement can * be simplified. */ return (x < y ? x : y); } DUK_INTERNAL duk_double_t duk_double_fmax(duk_double_t x, duk_double_t y) { /* Doesn't replicate fmax() behavior exactly: for fmax() if one * argument is a NaN, the other argument should be returned. * Duktape doesn't rely on this behavior so the replacement can * be simplified. */ return (x > y ? x : y); } DUK_INTERNAL duk_bool_t duk_double_is_finite(duk_double_t x) { return !duk_double_is_nan_or_inf(x); } DUK_INTERNAL duk_bool_t duk_double_is_integer(duk_double_t x) { if (duk_double_is_nan_or_inf(x)) { return 0; } else { return duk_js_tointeger_number(x) == x; } } DUK_INTERNAL duk_bool_t duk_double_is_safe_integer(duk_double_t x) { /* >>> 2**53-1 * 9007199254740991 */ return duk_double_is_integer(x) && DUK_FABS(x) <= 9007199254740991.0; } /* Check whether a duk_double_t is a whole number in the 32-bit range (reject * negative zero), and if so, return a duk_int32_t. * For compiler use: don't allow negative zero as it will cause trouble with * LDINT+LDINTX, positive zero is OK. */ DUK_INTERNAL duk_bool_t duk_is_whole_get_int32_nonegzero(duk_double_t x, duk_int32_t *ival) { duk_int32_t t; t = duk_double_to_int32_t(x); if (!((duk_double_t) t == x)) { return 0; } if (t == 0) { duk_double_union du; du.d = x; if (DUK_DBLUNION_HAS_SIGNBIT(&du)) { return 0; } } *ival = t; return 1; } /* Check whether a duk_double_t is a whole number in the 32-bit range, and if * so, return a duk_int32_t. */ DUK_INTERNAL duk_bool_t duk_is_whole_get_int32(duk_double_t x, duk_int32_t *ival) { duk_int32_t t; t = duk_double_to_int32_t(x); if (!((duk_double_t) t == x)) { return 0; } *ival = t; return 1; } /* Division: division by zero is undefined behavior (and may in fact trap) * so it needs special handling for portability. */ DUK_INTERNAL DUK_INLINE duk_double_t duk_double_div(duk_double_t x, duk_double_t y) { #if !defined(DUK_USE_ALLOW_UNDEFINED_BEHAVIOR) if (DUK_UNLIKELY(y == 0.0)) { /* In C99+ division by zero is undefined behavior so * avoid it entirely. Hopefully the compiler is * smart enough to avoid emitting any actual code * because almost all practical platforms behave as * expected. */ if (x > 0.0) { if (DUK_SIGNBIT(y)) { return -DUK_DOUBLE_INFINITY; } else { return DUK_DOUBLE_INFINITY; } } else if (x < 0.0) { if (DUK_SIGNBIT(y)) { return DUK_DOUBLE_INFINITY; } else { return -DUK_DOUBLE_INFINITY; } } else { /* +/- 0, NaN */ return DUK_DOUBLE_NAN; } } #endif return x / y; } /* * Hash function duk_util_hashbytes(). * * Currently, 32-bit MurmurHash2. * * Don't rely on specific hash values; hash function may be endianness * dependent, for instance. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_STRHASH_DENSE) /* 'magic' constants for Murmurhash2 */ #define DUK__MAGIC_M ((duk_uint32_t) 0x5bd1e995UL) #define DUK__MAGIC_R 24 DUK_INTERNAL duk_uint32_t duk_util_hashbytes(const duk_uint8_t *data, duk_size_t len, duk_uint32_t seed) { duk_uint32_t h = seed ^ ((duk_uint32_t) len); while (len >= 4) { /* Portability workaround is required for platforms without * unaligned access. The replacement code emulates little * endian access even on big endian architectures, which is * OK as long as it is consistent for a build. */ #if defined(DUK_USE_HASHBYTES_UNALIGNED_U32_ACCESS) duk_uint32_t k = *((const duk_uint32_t *) (const void *) data); #else duk_uint32_t k = ((duk_uint32_t) data[0]) | (((duk_uint32_t) data[1]) << 8) | (((duk_uint32_t) data[2]) << 16) | (((duk_uint32_t) data[3]) << 24); #endif k *= DUK__MAGIC_M; k ^= k >> DUK__MAGIC_R; k *= DUK__MAGIC_M; h *= DUK__MAGIC_M; h ^= k; data += 4; len -= 4; } switch (len) { case 3: h ^= data[2] << 16; case 2: h ^= data[1] << 8; case 1: h ^= data[0]; h *= DUK__MAGIC_M; } h ^= h >> 13; h *= DUK__MAGIC_M; h ^= h >> 15; return h; } #endif /* DUK_USE_STRHASH_DENSE */ /* automatic undefs */ #undef DUK__MAGIC_M #undef DUK__MAGIC_R /* * Memory utils. */ /* #include duk_internal.h -> already included */ #if defined(DUK_USE_ALLOW_UNDEFINED_BEHAVIOR) DUK_INTERNAL DUK_INLINE duk_small_int_t duk_memcmp_unsafe(const void *s1, const void *s2, duk_size_t len) { DUK_ASSERT(s1 != NULL || len == 0U); DUK_ASSERT(s2 != NULL || len == 0U); return DUK_MEMCMP(s1, s2, (size_t) len); } DUK_INTERNAL DUK_INLINE duk_small_int_t duk_memcmp(const void *s1, const void *s2, duk_size_t len) { DUK_ASSERT(s1 != NULL); DUK_ASSERT(s2 != NULL); return DUK_MEMCMP(s1, s2, (size_t) len); } #else /* DUK_USE_ALLOW_UNDEFINED_BEHAVIOR */ DUK_INTERNAL DUK_INLINE duk_small_int_t duk_memcmp_unsafe(const void *s1, const void *s2, duk_size_t len) { DUK_ASSERT(s1 != NULL || len == 0U); DUK_ASSERT(s2 != NULL || len == 0U); if (DUK_UNLIKELY(len == 0U)) { return 0; } DUK_ASSERT(s1 != NULL); DUK_ASSERT(s2 != NULL); return duk_memcmp(s1, s2, len); } DUK_INTERNAL DUK_INLINE duk_small_int_t duk_memcmp(const void *s1, const void *s2, duk_size_t len) { DUK_ASSERT(s1 != NULL); DUK_ASSERT(s2 != NULL); return DUK_MEMCMP(s1, s2, (size_t) len); } #endif /* DUK_USE_ALLOW_UNDEFINED_BEHAVIOR */ /* * A tiny random number generator used for Math.random() and other internals. * * Default algorithm is xoroshiro128+: http://xoroshiro.di.unimi.it/xoroshiro128plus.c * with SplitMix64 seed preparation: http://xorshift.di.unimi.it/splitmix64.c. * * Low memory targets and targets without 64-bit types use a slightly smaller * (but slower) algorithm by Adi Shamir: * http://www.woodmann.com/forum/archive/index.php/t-3100.html. * */ /* #include duk_internal.h -> already included */ #if !defined(DUK_USE_GET_RANDOM_DOUBLE) #if defined(DUK_USE_PREFER_SIZE) || !defined(DUK_USE_64BIT_OPS) #define DUK__RANDOM_SHAMIR3OP #else #define DUK__RANDOM_XOROSHIRO128PLUS #endif #if defined(DUK__RANDOM_SHAMIR3OP) #define DUK__UPDATE_RND(rnd) do { \ (rnd) += ((rnd) * (rnd)) | 0x05UL; \ (rnd) = ((rnd) & 0xffffffffUL); /* if duk_uint32_t is exactly 32 bits, this is a NOP */ \ } while (0) #define DUK__RND_BIT(rnd) ((rnd) >> 31) /* only use the highest bit */ DUK_INTERNAL void duk_util_tinyrandom_prepare_seed(duk_hthread *thr) { DUK_UNREF(thr); /* Nothing now. */ } DUK_INTERNAL duk_double_t duk_util_tinyrandom_get_double(duk_hthread *thr) { duk_double_t t; duk_small_int_t n; duk_uint32_t rnd; rnd = thr->heap->rnd_state; n = 53; /* enough to cover the whole mantissa */ t = 0.0; do { DUK__UPDATE_RND(rnd); t += DUK__RND_BIT(rnd); t /= 2.0; } while (--n); thr->heap->rnd_state = rnd; DUK_ASSERT(t >= (duk_double_t) 0.0); DUK_ASSERT(t < (duk_double_t) 1.0); return t; } #endif /* DUK__RANDOM_SHAMIR3OP */ #if defined(DUK__RANDOM_XOROSHIRO128PLUS) DUK_LOCAL DUK_ALWAYS_INLINE duk_uint64_t duk__rnd_splitmix64(duk_uint64_t *x) { duk_uint64_t z; z = (*x += DUK_U64_CONSTANT(0x9E3779B97F4A7C15)); z = (z ^ (z >> 30U)) * DUK_U64_CONSTANT(0xBF58476D1CE4E5B9); z = (z ^ (z >> 27U)) * DUK_U64_CONSTANT(0x94D049BB133111EB); return z ^ (z >> 31U); } DUK_LOCAL DUK_ALWAYS_INLINE duk_uint64_t duk__rnd_rotl(const duk_uint64_t x, duk_small_uint_t k) { return (x << k) | (x >> (64U - k)); } DUK_LOCAL DUK_ALWAYS_INLINE duk_uint64_t duk__xoroshiro128plus(duk_uint64_t *s) { duk_uint64_t s0; duk_uint64_t s1; duk_uint64_t res; s0 = s[0]; s1 = s[1]; res = s0 + s1; s1 ^= s0; s[0] = duk__rnd_rotl(s0, 55) ^ s1 ^ (s1 << 14U); s[1] = duk__rnd_rotl(s1, 36); return res; } DUK_INTERNAL void duk_util_tinyrandom_prepare_seed(duk_hthread *thr) { duk_small_uint_t i; duk_uint64_t x; /* Mix both halves of the initial seed with SplitMix64. The intent * is to ensure that very similar raw seeds (which is usually the case * because current seed is Date.now()) result in different xoroshiro128+ * seeds. */ x = thr->heap->rnd_state[0]; /* Only [0] is used as input here. */ for (i = 0; i < 64; i++) { thr->heap->rnd_state[i & 0x01] = duk__rnd_splitmix64(&x); /* Keep last 2 values. */ } } DUK_INTERNAL duk_double_t duk_util_tinyrandom_get_double(duk_hthread *thr) { duk_uint64_t v; duk_double_union du; /* For big and little endian the integer and IEEE double byte order * is the same so a direct assignment works. For mixed endian the * 32-bit parts must be swapped. */ v = (DUK_U64_CONSTANT(0x3ff) << 52U) | (duk__xoroshiro128plus((duk_uint64_t *) thr->heap->rnd_state) >> 12U); du.ull[0] = v; #if defined(DUK_USE_DOUBLE_ME) do { duk_uint32_t tmp; tmp = du.ui[0]; du.ui[0] = du.ui[1]; du.ui[1] = tmp; } while (0); #endif return du.d - 1.0; } #endif /* DUK__RANDOM_XOROSHIRO128PLUS */ #endif /* !DUK_USE_GET_RANDOM_DOUBLE */ /* automatic undefs */ #undef DUK__RANDOM_SHAMIR3OP #undef DUK__RANDOM_XOROSHIRO128PLUS #undef DUK__RND_BIT #undef DUK__UPDATE_RND #endif