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annotate third_party/luajit/src/lj_load.c @ 212:84826b3c655b

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[MrJuneJune] Forgot to add assets.
author MrJuneJune <me@mrjunejune.com>
date Sun, 15 Feb 2026 21:38:36 -0800
parents 94705b5986b3
children
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rev   line source
178
94705b5986b3 [ThirdParty] Added WRK and luajit for load testing.
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1 /*
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2 ** Load and dump code.
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3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
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4 */
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5
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6 #include <errno.h>
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7 #include <stdio.h>
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8
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9 #define lj_load_c
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10 #define LUA_CORE
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11
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12 #include "lua.h"
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13 #include "lauxlib.h"
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14
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15 #include "lj_obj.h"
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16 #include "lj_gc.h"
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17 #include "lj_err.h"
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18 #include "lj_buf.h"
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19 #include "lj_func.h"
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20 #include "lj_frame.h"
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21 #include "lj_vm.h"
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22 #include "lj_lex.h"
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23 #include "lj_bcdump.h"
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24 #include "lj_parse.h"
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25
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26 /* -- Load Lua source code and bytecode ----------------------------------- */
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27
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28 static TValue *cpparser(lua_State *L, lua_CFunction dummy, void *ud)
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29 {
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30 LexState *ls = (LexState *)ud;
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31 GCproto *pt;
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32 GCfunc *fn;
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33 int bc;
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34 UNUSED(dummy);
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35 cframe_errfunc(L->cframe) = -1; /* Inherit error function. */
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36 bc = lj_lex_setup(L, ls);
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37 if (ls->mode && !strchr(ls->mode, bc ? 'b' : 't')) {
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38 setstrV(L, L->top++, lj_err_str(L, LJ_ERR_XMODE));
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39 lj_err_throw(L, LUA_ERRSYNTAX);
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40 }
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41 pt = bc ? lj_bcread(ls) : lj_parse(ls);
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42 fn = lj_func_newL_empty(L, pt, tabref(L->env));
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43 /* Don't combine above/below into one statement. */
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44 setfuncV(L, L->top++, fn);
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45 return NULL;
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46 }
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47
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48 LUA_API int lua_loadx(lua_State *L, lua_Reader reader, void *data,
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49 const char *chunkname, const char *mode)
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50 {
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51 LexState ls;
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52 int status;
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53 ls.rfunc = reader;
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54 ls.rdata = data;
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55 ls.chunkarg = chunkname ? chunkname : "?";
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56 ls.mode = mode;
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57 lj_buf_init(L, &ls.sb);
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58 status = lj_vm_cpcall(L, NULL, &ls, cpparser);
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59 lj_lex_cleanup(L, &ls);
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60 lj_gc_check(L);
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61 return status;
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62 }
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63
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64 LUA_API int lua_load(lua_State *L, lua_Reader reader, void *data,
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65 const char *chunkname)
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66 {
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67 return lua_loadx(L, reader, data, chunkname, NULL);
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68 }
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69
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70 typedef struct FileReaderCtx {
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71 FILE *fp;
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72 char buf[LUAL_BUFFERSIZE];
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73 } FileReaderCtx;
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74
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75 static const char *reader_file(lua_State *L, void *ud, size_t *size)
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76 {
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77 FileReaderCtx *ctx = (FileReaderCtx *)ud;
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78 UNUSED(L);
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79 if (feof(ctx->fp)) return NULL;
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80 *size = fread(ctx->buf, 1, sizeof(ctx->buf), ctx->fp);
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81 return *size > 0 ? ctx->buf : NULL;
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82 }
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83
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84 LUALIB_API int luaL_loadfilex(lua_State *L, const char *filename,
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85 const char *mode)
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86 {
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87 FileReaderCtx ctx;
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88 int status;
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89 const char *chunkname;
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90 if (filename) {
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91 ctx.fp = fopen(filename, "rb");
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92 if (ctx.fp == NULL) {
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93 lua_pushfstring(L, "cannot open %s: %s", filename, strerror(errno));
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94 return LUA_ERRFILE;
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95 }
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96 chunkname = lua_pushfstring(L, "@%s", filename);
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97 } else {
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98 ctx.fp = stdin;
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99 chunkname = "=stdin";
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100 }
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101 status = lua_loadx(L, reader_file, &ctx, chunkname, mode);
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102 if (ferror(ctx.fp)) {
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103 L->top -= filename ? 2 : 1;
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104 lua_pushfstring(L, "cannot read %s: %s", chunkname+1, strerror(errno));
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105 if (filename)
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106 fclose(ctx.fp);
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107 return LUA_ERRFILE;
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108 }
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109 if (filename) {
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110 L->top--;
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111 copyTV(L, L->top-1, L->top);
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112 fclose(ctx.fp);
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113 }
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114 return status;
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115 }
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116
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117 LUALIB_API int luaL_loadfile(lua_State *L, const char *filename)
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118 {
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119 return luaL_loadfilex(L, filename, NULL);
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120 }
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121
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122 typedef struct StringReaderCtx {
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123 const char *str;
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124 size_t size;
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125 } StringReaderCtx;
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126
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127 static const char *reader_string(lua_State *L, void *ud, size_t *size)
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128 {
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129 StringReaderCtx *ctx = (StringReaderCtx *)ud;
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130 UNUSED(L);
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131 if (ctx->size == 0) return NULL;
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132 *size = ctx->size;
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133 ctx->size = 0;
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134 return ctx->str;
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135 }
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136
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137 LUALIB_API int luaL_loadbufferx(lua_State *L, const char *buf, size_t size,
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138 const char *name, const char *mode)
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139 {
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140 StringReaderCtx ctx;
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141 ctx.str = buf;
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142 ctx.size = size;
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143 return lua_loadx(L, reader_string, &ctx, name, mode);
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144 }
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145
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146 LUALIB_API int luaL_loadbuffer(lua_State *L, const char *buf, size_t size,
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147 const char *name)
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148 {
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149 return luaL_loadbufferx(L, buf, size, name, NULL);
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150 }
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151
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152 LUALIB_API int luaL_loadstring(lua_State *L, const char *s)
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153 {
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154 return luaL_loadbuffer(L, s, strlen(s), s);
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155 }
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156
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157 /* -- Dump bytecode ------------------------------------------------------- */
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158
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159 LUA_API int lua_dump(lua_State *L, lua_Writer writer, void *data)
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160 {
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161 cTValue *o = L->top-1;
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162 lj_checkapi(L->top > L->base, "top slot empty");
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163 if (tvisfunc(o) && isluafunc(funcV(o)))
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164 return lj_bcwrite(L, funcproto(funcV(o)), writer, data, 0);
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165 else
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166 return 1;
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167 }
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168