| 1 | /* |
| 2 | ** $Id: ldebug.c,v 2.90 2012/08/16 17:34:28 roberto Exp $ |
| 3 | ** Debug Interface |
| 4 | ** See Copyright Notice in lua.h |
| 5 | */ |
| 6 | |
| 7 | |
| 8 | #include <stdarg.h> |
| 9 | #include <stddef.h> |
| 10 | #include <string.h> |
| 11 | |
| 12 | |
| 13 | #define ldebug_c |
| 14 | #define LUA_CORE |
| 15 | |
| 16 | #include "lua.h" |
| 17 | |
| 18 | #include "lapi.h" |
| 19 | #include "lcode.h" |
| 20 | #include "ldebug.h" |
| 21 | #include "ldo.h" |
| 22 | #include "lfunc.h" |
| 23 | #include "lobject.h" |
| 24 | #include "lopcodes.h" |
| 25 | #include "lstate.h" |
| 26 | #include "lstring.h" |
| 27 | #include "ltable.h" |
| 28 | #include "ltm.h" |
| 29 | #include "lvm.h" |
| 30 | |
| 31 | |
| 32 | |
| 33 | #define noLuaClosure(f) ((f) == NULL || (f)->c.tt == LUA_TCCL) |
| 34 | |
| 35 | |
| 36 | static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name); |
| 37 | |
| 38 | |
| 39 | static int currentpc (CallInfo *ci) { |
| 40 | lua_assert(isLua(ci)); |
| 41 | return pcRel(ci->u.l.savedpc, ci_func(ci)->p); |
| 42 | } |
| 43 | |
| 44 | |
| 45 | static int currentline (CallInfo *ci) { |
| 46 | return getfuncline(ci_func(ci)->p, currentpc(ci)); |
| 47 | } |
| 48 | |
| 49 | |
| 50 | /* |
| 51 | ** this function can be called asynchronous (e.g. during a signal) |
| 52 | */ |
| 53 | LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) { |
| 54 | if (func == NULL || mask == 0) { /* turn off hooks? */ |
| 55 | mask = 0; |
| 56 | func = NULL; |
| 57 | } |
| 58 | if (isLua(L->ci)) |
| 59 | L->oldpc = L->ci->u.l.savedpc; |
| 60 | L->hook = func; |
| 61 | L->basehookcount = count; |
| 62 | resethookcount(L); |
| 63 | L->hookmask = cast_byte(mask); |
| 64 | return 1; |
| 65 | } |
| 66 | |
| 67 | |
| 68 | LUA_API lua_Hook lua_gethook (lua_State *L) { |
| 69 | return L->hook; |
| 70 | } |
| 71 | |
| 72 | |
| 73 | LUA_API int lua_gethookmask (lua_State *L) { |
| 74 | return L->hookmask; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | LUA_API int lua_gethookcount (lua_State *L) { |
| 79 | return L->basehookcount; |
| 80 | } |
| 81 | |
| 82 | |
| 83 | LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) { |
| 84 | int status; |
| 85 | CallInfo *ci; |
| 86 | if (level < 0) return 0; /* invalid (negative) level */ |
| 87 | lua_lock(L); |
| 88 | for (ci = L->ci; level > 0 && ci != &L->base_ci; ci = ci->previous) |
| 89 | level--; |
| 90 | if (level == 0 && ci != &L->base_ci) { /* level found? */ |
| 91 | status = 1; |
| 92 | ar->i_ci = ci; |
| 93 | } |
| 94 | else status = 0; /* no such level */ |
| 95 | lua_unlock(L); |
| 96 | return status; |
| 97 | } |
| 98 | |
| 99 | |
| 100 | static const char *upvalname (Proto *p, int uv) { |
| 101 | TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name); |
| 102 | if (s == NULL) return "?"; |
| 103 | else return getstr(s); |
| 104 | } |
| 105 | |
| 106 | |
| 107 | static const char *findvararg (CallInfo *ci, int n, StkId *pos) { |
| 108 | int nparams = clLvalue(ci->func)->p->numparams; |
| 109 | if (n >= ci->u.l.base - ci->func - nparams) |
| 110 | return NULL; /* no such vararg */ |
| 111 | else { |
| 112 | *pos = ci->func + nparams + n; |
| 113 | return "(*vararg)"; /* generic name for any vararg */ |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | |
| 118 | static const char *findlocal (lua_State *L, CallInfo *ci, int n, |
| 119 | StkId *pos) { |
| 120 | const char *name = NULL; |
| 121 | StkId base; |
| 122 | if (isLua(ci)) { |
| 123 | if (n < 0) /* access to vararg values? */ |
| 124 | return findvararg(ci, -n, pos); |
| 125 | else { |
| 126 | base = ci->u.l.base; |
| 127 | name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci)); |
| 128 | } |
| 129 | } |
| 130 | else |
| 131 | base = ci->func + 1; |
| 132 | if (name == NULL) { /* no 'standard' name? */ |
| 133 | StkId limit = (ci == L->ci) ? L->top : ci->next->func; |
| 134 | if (limit - base >= n && n > 0) /* is 'n' inside 'ci' stack? */ |
| 135 | name = "(*temporary)"; /* generic name for any valid slot */ |
| 136 | else |
| 137 | return NULL; /* no name */ |
| 138 | } |
| 139 | *pos = base + (n - 1); |
| 140 | return name; |
| 141 | } |
| 142 | |
| 143 | |
| 144 | LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) { |
| 145 | const char *name; |
| 146 | lua_lock(L); |
| 147 | if (ar == NULL) { /* information about non-active function? */ |
| 148 | if (!isLfunction(L->top - 1)) /* not a Lua function? */ |
| 149 | name = NULL; |
| 150 | else /* consider live variables at function start (parameters) */ |
| 151 | name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0); |
| 152 | } |
| 153 | else { /* active function; get information through 'ar' */ |
| 154 | StkId pos = 0; /* to avoid warnings */ |
| 155 | name = findlocal(L, ar->i_ci, n, &pos); |
| 156 | if (name) { |
| 157 | setobj2s(L, L->top, pos); |
| 158 | api_incr_top(L); |
| 159 | } |
| 160 | } |
| 161 | lua_unlock(L); |
| 162 | return name; |
| 163 | } |
| 164 | |
| 165 | |
| 166 | LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) { |
| 167 | StkId pos = 0; /* to avoid warnings */ |
| 168 | const char *name = findlocal(L, ar->i_ci, n, &pos); |
| 169 | lua_lock(L); |
| 170 | if (name) |
| 171 | setobjs2s(L, pos, L->top - 1); |
| 172 | L->top--; /* pop value */ |
| 173 | lua_unlock(L); |
| 174 | return name; |
| 175 | } |
| 176 | |
| 177 | |
| 178 | static void funcinfo (lua_Debug *ar, Closure *cl) { |
| 179 | if (noLuaClosure(cl)) { |
| 180 | ar->source = "=[C]"; |
| 181 | ar->linedefined = -1; |
| 182 | ar->lastlinedefined = -1; |
| 183 | ar->what = "C"; |
| 184 | } |
| 185 | else { |
| 186 | Proto *p = cl->l.p; |
| 187 | ar->source = p->source ? getstr(p->source) : "=?"; |
| 188 | ar->linedefined = p->linedefined; |
| 189 | ar->lastlinedefined = p->lastlinedefined; |
| 190 | ar->what = (ar->linedefined == 0) ? "main" : "Lua"; |
| 191 | } |
| 192 | luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE); |
| 193 | } |
| 194 | |
| 195 | |
| 196 | static void collectvalidlines (lua_State *L, Closure *f) { |
| 197 | if (noLuaClosure(f)) { |
| 198 | setnilvalue(L->top); |
| 199 | api_incr_top(L); |
| 200 | } |
| 201 | else { |
| 202 | int i; |
| 203 | TValue v; |
| 204 | int *lineinfo = f->l.p->lineinfo; |
| 205 | Table *t = luaH_new(L); /* new table to store active lines */ |
| 206 | sethvalue(L, L->top, t); /* push it on stack */ |
| 207 | api_incr_top(L); |
| 208 | setbvalue(&v, 1); /* boolean 'true' to be the value of all indices */ |
| 209 | for (i = 0; i < f->l.p->sizelineinfo; i++) /* for all lines with code */ |
| 210 | luaH_setint(L, t, lineinfo[i], &v); /* table[line] = true */ |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | |
| 215 | static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar, |
| 216 | Closure *f, CallInfo *ci) { |
| 217 | int status = 1; |
| 218 | for (; *what; what++) { |
| 219 | switch (*what) { |
| 220 | case 'S': { |
| 221 | funcinfo(ar, f); |
| 222 | break; |
| 223 | } |
| 224 | case 'l': { |
| 225 | ar->currentline = (ci && isLua(ci)) ? currentline(ci) : -1; |
| 226 | break; |
| 227 | } |
| 228 | case 'u': { |
| 229 | ar->nups = (f == NULL) ? 0 : f->c.nupvalues; |
| 230 | if (noLuaClosure(f)) { |
| 231 | ar->isvararg = 1; |
| 232 | ar->nparams = 0; |
| 233 | } |
| 234 | else { |
| 235 | ar->isvararg = f->l.p->is_vararg; |
| 236 | ar->nparams = f->l.p->numparams; |
| 237 | } |
| 238 | break; |
| 239 | } |
| 240 | case 't': { |
| 241 | ar->istailcall = (ci) ? ci->callstatus & CIST_TAIL : 0; |
| 242 | break; |
| 243 | } |
| 244 | case 'n': { |
| 245 | /* calling function is a known Lua function? */ |
| 246 | if (ci && !(ci->callstatus & CIST_TAIL) && isLua(ci->previous)) |
| 247 | ar->namewhat = getfuncname(L, ci->previous, &ar->name); |
| 248 | else |
| 249 | ar->namewhat = NULL; |
| 250 | if (ar->namewhat == NULL) { |
| 251 | ar->namewhat = ""; /* not found */ |
| 252 | ar->name = NULL; |
| 253 | } |
| 254 | break; |
| 255 | } |
| 256 | case 'L': |
| 257 | case 'f': /* handled by lua_getinfo */ |
| 258 | break; |
| 259 | default: status = 0; /* invalid option */ |
| 260 | } |
| 261 | } |
| 262 | return status; |
| 263 | } |
| 264 | |
| 265 | |
| 266 | LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) { |
| 267 | int status; |
| 268 | Closure *cl; |
| 269 | CallInfo *ci; |
| 270 | StkId func; |
| 271 | lua_lock(L); |
| 272 | if (*what == '>') { |
| 273 | ci = NULL; |
| 274 | func = L->top - 1; |
| 275 | api_check(L, ttisfunction(func), "function expected"); |
| 276 | what++; /* skip the '>' */ |
| 277 | L->top--; /* pop function */ |
| 278 | } |
| 279 | else { |
| 280 | ci = ar->i_ci; |
| 281 | func = ci->func; |
| 282 | lua_assert(ttisfunction(ci->func)); |
| 283 | } |
| 284 | cl = ttisclosure(func) ? clvalue(func) : NULL; |
| 285 | status = auxgetinfo(L, what, ar, cl, ci); |
| 286 | if (strchr(what, 'f')) { |
| 287 | setobjs2s(L, L->top, func); |
| 288 | api_incr_top(L); |
| 289 | } |
| 290 | if (strchr(what, 'L')) |
| 291 | collectvalidlines(L, cl); |
| 292 | lua_unlock(L); |
| 293 | return status; |
| 294 | } |
| 295 | |
| 296 | |
| 297 | /* |
| 298 | ** {====================================================== |
| 299 | ** Symbolic Execution |
| 300 | ** ======================================================= |
| 301 | */ |
| 302 | |
| 303 | static const char *getobjname (Proto *p, int lastpc, int reg, |
| 304 | const char **name); |
| 305 | |
| 306 | |
| 307 | /* |
| 308 | ** find a "name" for the RK value 'c' |
| 309 | */ |
| 310 | static void kname (Proto *p, int pc, int c, const char **name) { |
| 311 | if (ISK(c)) { /* is 'c' a constant? */ |
| 312 | TValue *kvalue = &p->k[INDEXK(c)]; |
| 313 | if (ttisstring(kvalue)) { /* literal constant? */ |
| 314 | *name = svalue(kvalue); /* it is its own name */ |
| 315 | return; |
| 316 | } |
| 317 | /* else no reasonable name found */ |
| 318 | } |
| 319 | else { /* 'c' is a register */ |
| 320 | const char *what = getobjname(p, pc, c, name); /* search for 'c' */ |
| 321 | if (what && *what == 'c') { /* found a constant name? */ |
| 322 | return; /* 'name' already filled */ |
| 323 | } |
| 324 | /* else no reasonable name found */ |
| 325 | } |
| 326 | *name = "?"; /* no reasonable name found */ |
| 327 | } |
| 328 | |
| 329 | |
| 330 | /* |
| 331 | ** try to find last instruction before 'lastpc' that modified register 'reg' |
| 332 | */ |
| 333 | static int findsetreg (Proto *p, int lastpc, int reg) { |
| 334 | int pc; |
| 335 | int setreg = -1; /* keep last instruction that changed 'reg' */ |
| 336 | for (pc = 0; pc < lastpc; pc++) { |
| 337 | Instruction i = p->code[pc]; |
| 338 | OpCode op = GET_OPCODE(i); |
| 339 | int a = GETARG_A(i); |
| 340 | switch (op) { |
| 341 | case OP_LOADNIL: { |
| 342 | int b = GETARG_B(i); |
| 343 | if (a <= reg && reg <= a + b) /* set registers from 'a' to 'a+b' */ |
| 344 | setreg = pc; |
| 345 | break; |
| 346 | } |
| 347 | case OP_TFORCALL: { |
| 348 | if (reg >= a + 2) setreg = pc; /* affect all regs above its base */ |
| 349 | break; |
| 350 | } |
| 351 | case OP_CALL: |
| 352 | case OP_TAILCALL: { |
| 353 | if (reg >= a) setreg = pc; /* affect all registers above base */ |
| 354 | break; |
| 355 | } |
| 356 | case OP_JMP: { |
| 357 | int b = GETARG_sBx(i); |
| 358 | int dest = pc + 1 + b; |
| 359 | /* jump is forward and do not skip `lastpc'? */ |
| 360 | if (pc < dest && dest <= lastpc) |
| 361 | pc += b; /* do the jump */ |
| 362 | break; |
| 363 | } |
| 364 | case OP_TEST: { |
| 365 | if (reg == a) setreg = pc; /* jumped code can change 'a' */ |
| 366 | break; |
| 367 | } |
| 368 | default: |
| 369 | if (testAMode(op) && reg == a) /* any instruction that set A */ |
| 370 | setreg = pc; |
| 371 | break; |
| 372 | } |
| 373 | } |
| 374 | return setreg; |
| 375 | } |
| 376 | |
| 377 | |
| 378 | static const char *getobjname (Proto *p, int lastpc, int reg, |
| 379 | const char **name) { |
| 380 | int pc; |
| 381 | *name = luaF_getlocalname(p, reg + 1, lastpc); |
| 382 | if (*name) /* is a local? */ |
| 383 | return "local"; |
| 384 | /* else try symbolic execution */ |
| 385 | pc = findsetreg(p, lastpc, reg); |
| 386 | if (pc != -1) { /* could find instruction? */ |
| 387 | Instruction i = p->code[pc]; |
| 388 | OpCode op = GET_OPCODE(i); |
| 389 | switch (op) { |
| 390 | case OP_MOVE: { |
| 391 | int b = GETARG_B(i); /* move from 'b' to 'a' */ |
| 392 | if (b < GETARG_A(i)) |
| 393 | return getobjname(p, pc, b, name); /* get name for 'b' */ |
| 394 | break; |
| 395 | } |
| 396 | case OP_GETTABUP: |
| 397 | case OP_GETTABLE: { |
| 398 | int k = GETARG_C(i); /* key index */ |
| 399 | int t = GETARG_B(i); /* table index */ |
| 400 | const char *vn = (op == OP_GETTABLE) /* name of indexed variable */ |
| 401 | ? luaF_getlocalname(p, t + 1, pc) |
| 402 | : upvalname(p, t); |
| 403 | kname(p, pc, k, name); |
| 404 | return (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field"; |
| 405 | } |
| 406 | case OP_GETUPVAL: { |
| 407 | *name = upvalname(p, GETARG_B(i)); |
| 408 | return "upvalue"; |
| 409 | } |
| 410 | case OP_LOADK: |
| 411 | case OP_LOADKX: { |
| 412 | int b = (op == OP_LOADK) ? GETARG_Bx(i) |
| 413 | : GETARG_Ax(p->code[pc + 1]); |
| 414 | if (ttisstring(&p->k[b])) { |
| 415 | *name = svalue(&p->k[b]); |
| 416 | return "constant"; |
| 417 | } |
| 418 | break; |
| 419 | } |
| 420 | case OP_SELF: { |
| 421 | int k = GETARG_C(i); /* key index */ |
| 422 | kname(p, pc, k, name); |
| 423 | return "method"; |
| 424 | } |
| 425 | default: break; /* go through to return NULL */ |
| 426 | } |
| 427 | } |
| 428 | return NULL; /* could not find reasonable name */ |
| 429 | } |
| 430 | |
| 431 | |
| 432 | static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) { |
| 433 | TMS tm; |
| 434 | Proto *p = ci_func(ci)->p; /* calling function */ |
| 435 | int pc = currentpc(ci); /* calling instruction index */ |
| 436 | Instruction i = p->code[pc]; /* calling instruction */ |
| 437 | switch (GET_OPCODE(i)) { |
| 438 | case OP_CALL: |
| 439 | case OP_TAILCALL: /* get function name */ |
| 440 | return getobjname(p, pc, GETARG_A(i), name); |
| 441 | case OP_TFORCALL: { /* for iterator */ |
| 442 | *name = "for iterator"; |
| 443 | return "for iterator"; |
| 444 | } |
| 445 | /* all other instructions can call only through metamethods */ |
| 446 | case OP_SELF: |
| 447 | case OP_GETTABUP: |
| 448 | case OP_GETTABLE: tm = TM_INDEX; break; |
| 449 | case OP_SETTABUP: |
| 450 | case OP_SETTABLE: tm = TM_NEWINDEX; break; |
| 451 | case OP_EQ: tm = TM_EQ; break; |
| 452 | case OP_ADD: tm = TM_ADD; break; |
| 453 | case OP_SUB: tm = TM_SUB; break; |
| 454 | case OP_MUL: tm = TM_MUL; break; |
| 455 | case OP_DIV: tm = TM_DIV; break; |
| 456 | case OP_MOD: tm = TM_MOD; break; |
| 457 | case OP_POW: tm = TM_POW; break; |
| 458 | case OP_UNM: tm = TM_UNM; break; |
| 459 | case OP_LEN: tm = TM_LEN; break; |
| 460 | case OP_LT: tm = TM_LT; break; |
| 461 | case OP_LE: tm = TM_LE; break; |
| 462 | case OP_CONCAT: tm = TM_CONCAT; break; |
| 463 | default: |
| 464 | return NULL; /* else no useful name can be found */ |
| 465 | } |
| 466 | *name = getstr(G(L)->tmname[tm]); |
| 467 | return "metamethod"; |
| 468 | } |
| 469 | |
| 470 | /* }====================================================== */ |
| 471 | |
| 472 | |
| 473 | |
| 474 | /* |
| 475 | ** only ANSI way to check whether a pointer points to an array |
| 476 | ** (used only for error messages, so efficiency is not a big concern) |
| 477 | */ |
| 478 | static int isinstack (CallInfo *ci, const TValue *o) { |
| 479 | StkId p; |
| 480 | for (p = ci->u.l.base; p < ci->top; p++) |
| 481 | if (o == p) return 1; |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | |
| 486 | static const char *getupvalname (CallInfo *ci, const TValue *o, |
| 487 | const char **name) { |
| 488 | LClosure *c = ci_func(ci); |
| 489 | int i; |
| 490 | for (i = 0; i < c->nupvalues; i++) { |
| 491 | if (c->upvals[i]->v == o) { |
| 492 | *name = upvalname(c->p, i); |
| 493 | return "upvalue"; |
| 494 | } |
| 495 | } |
| 496 | return NULL; |
| 497 | } |
| 498 | |
| 499 | |
| 500 | l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) { |
| 501 | CallInfo *ci = L->ci; |
| 502 | const char *name = NULL; |
| 503 | const char *t = objtypename(o); |
| 504 | const char *kind = NULL; |
| 505 | if (isLua(ci)) { |
| 506 | kind = getupvalname(ci, o, &name); /* check whether 'o' is an upvalue */ |
| 507 | if (!kind && isinstack(ci, o)) /* no? try a register */ |
| 508 | kind = getobjname(ci_func(ci)->p, currentpc(ci), |
| 509 | cast_int(o - ci->u.l.base), &name); |
| 510 | } |
| 511 | if (kind) |
| 512 | luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)", |
| 513 | op, kind, name, t); |
| 514 | else |
| 515 | luaG_runerror(L, "attempt to %s a %s value", op, t); |
| 516 | } |
| 517 | |
| 518 | |
| 519 | l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2) { |
| 520 | if (ttisstring(p1) || ttisnumber(p1)) p1 = p2; |
| 521 | lua_assert(!ttisstring(p1) && !ttisnumber(p2)); |
| 522 | luaG_typeerror(L, p1, "concatenate"); |
| 523 | } |
| 524 | |
| 525 | |
| 526 | l_noret luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) { |
| 527 | TValue temp; |
| 528 | if (luaV_tonumber(p1, &temp) == NULL) |
| 529 | p2 = p1; /* first operand is wrong */ |
| 530 | luaG_typeerror(L, p2, "perform arithmetic on"); |
| 531 | } |
| 532 | |
| 533 | |
| 534 | l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) { |
| 535 | const char *t1 = objtypename(p1); |
| 536 | const char *t2 = objtypename(p2); |
| 537 | if (t1 == t2) |
| 538 | luaG_runerror(L, "attempt to compare two %s values", t1); |
| 539 | else |
| 540 | luaG_runerror(L, "attempt to compare %s with %s", t1, t2); |
| 541 | } |
| 542 | |
| 543 | |
| 544 | static void addinfo (lua_State *L, const char *msg) { |
| 545 | CallInfo *ci = L->ci; |
| 546 | if (isLua(ci)) { /* is Lua code? */ |
| 547 | char buff[LUA_IDSIZE]; /* add file:line information */ |
| 548 | int line = currentline(ci); |
| 549 | TString *src = ci_func(ci)->p->source; |
| 550 | if (src) |
| 551 | luaO_chunkid(buff, getstr(src), LUA_IDSIZE); |
| 552 | else { /* no source available; use "?" instead */ |
| 553 | buff[0] = '?'; buff[1] = '\0'; |
| 554 | } |
| 555 | luaO_pushfstring(L, "%s:%d: %s", buff, line, msg); |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | |
| 560 | l_noret luaG_errormsg (lua_State *L) { |
| 561 | if (L->errfunc != 0) { /* is there an error handling function? */ |
| 562 | StkId errfunc = restorestack(L, L->errfunc); |
| 563 | if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR); |
| 564 | setobjs2s(L, L->top, L->top - 1); /* move argument */ |
| 565 | setobjs2s(L, L->top - 1, errfunc); /* push function */ |
| 566 | L->top++; |
| 567 | luaD_call(L, L->top - 2, 1, 0); /* call it */ |
| 568 | } |
| 569 | luaD_throw(L, LUA_ERRRUN); |
| 570 | } |
| 571 | |
| 572 | |
| 573 | l_noret luaG_runerror (lua_State *L, const char *fmt, ...) { |
| 574 | va_list argp; |
| 575 | va_start(argp, fmt); |
| 576 | addinfo(L, luaO_pushvfstring(L, fmt, argp)); |
| 577 | va_end(argp); |
| 578 | luaG_errormsg(L); |
| 579 | } |
| 580 | |