| Line | Branch | Decision | Exec | Source |
|---|---|---|---|---|
| 1 | /* | |||
| 2 | ** $Id: ldblib.c $ | |||
| 3 | ** Interface from Lua to its debug API | |||
| 4 | ** See Copyright Notice in lua.h | |||
| 5 | */ | |||
| 6 | ||||
| 7 | #define ldblib_c | |||
| 8 | #define LUA_LIB | |||
| 9 | ||||
| 10 | #include "lprefix.h" | |||
| 11 | ||||
| 12 | ||||
| 13 | #include <stdio.h> | |||
| 14 | #include <stdlib.h> | |||
| 15 | #include <string.h> | |||
| 16 | ||||
| 17 | #include "lua.h" | |||
| 18 | ||||
| 19 | #include "lauxlib.h" | |||
| 20 | #include "lualib.h" | |||
| 21 | ||||
| 22 | ||||
| 23 | /* | |||
| 24 | ** The hook table at registry[HOOKKEY] maps threads to their current | |||
| 25 | ** hook function. | |||
| 26 | */ | |||
| 27 | static const char *const HOOKKEY = "_HOOKKEY"; | |||
| 28 | ||||
| 29 | ||||
| 30 | /* | |||
| 31 | ** If L1 != L, L1 can be in any state, and therefore there are no | |||
| 32 | ** guarantees about its stack space; any push in L1 must be | |||
| 33 | ** checked. | |||
| 34 | */ | |||
| 35 | ✗ | static void checkstack (lua_State *L, lua_State *L1, int n) { | ||
| 36 | ✗ | if (l_unlikely(L != L1 && !lua_checkstack(L1, n))) | ||
| 37 | ✗ | luaL_error(L, "stack overflow"); | ||
| 38 | ✗ | } | ||
| 39 | ||||
| 40 | ||||
| 41 | ✗ | static int db_getregistry (lua_State *L) { | ||
| 42 | ✗ | lua_pushvalue(L, LUA_REGISTRYINDEX); | ||
| 43 | ✗ | return 1; | ||
| 44 | } | |||
| 45 | ||||
| 46 | ||||
| 47 | ✗ | static int db_getmetatable (lua_State *L) { | ||
| 48 | ✗ | luaL_checkany(L, 1); | ||
| 49 | ✗ | if (!lua_getmetatable(L, 1)) { | ||
| 50 | ✗ | lua_pushnil(L); /* no metatable */ | ||
| 51 | } | |||
| 52 | ✗ | return 1; | ||
| 53 | } | |||
| 54 | ||||
| 55 | ||||
| 56 | ✗ | static int db_setmetatable (lua_State *L) { | ||
| 57 | ✗ | int t = lua_type(L, 2); | ||
| 58 | ✗ | luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table"); | ||
| 59 | ✗ | lua_settop(L, 2); | ||
| 60 | ✗ | lua_setmetatable(L, 1); | ||
| 61 | ✗ | return 1; /* return 1st argument */ | ||
| 62 | } | |||
| 63 | ||||
| 64 | ||||
| 65 | ✗ | static int db_getuservalue (lua_State *L) { | ||
| 66 | ✗ | int n = (int)luaL_optinteger(L, 2, 1); | ||
| 67 | ✗ | if (lua_type(L, 1) != LUA_TUSERDATA) | ||
| 68 | ✗ | luaL_pushfail(L); | ||
| 69 | ✗ | else if (lua_getiuservalue(L, 1, n) != LUA_TNONE) { | ||
| 70 | ✗ | lua_pushboolean(L, 1); | ||
| 71 | ✗ | return 2; | ||
| 72 | } | |||
| 73 | ✗ | return 1; | ||
| 74 | } | |||
| 75 | ||||
| 76 | ||||
| 77 | ✗ | static int db_setuservalue (lua_State *L) { | ||
| 78 | ✗ | int n = (int)luaL_optinteger(L, 3, 1); | ||
| 79 | ✗ | luaL_checktype(L, 1, LUA_TUSERDATA); | ||
| 80 | ✗ | luaL_checkany(L, 2); | ||
| 81 | ✗ | lua_settop(L, 2); | ||
| 82 | ✗ | if (!lua_setiuservalue(L, 1, n)) | ||
| 83 | ✗ | luaL_pushfail(L); | ||
| 84 | ✗ | return 1; | ||
| 85 | } | |||
| 86 | ||||
| 87 | ||||
| 88 | /* | |||
| 89 | ** Auxiliary function used by several library functions: check for | |||
| 90 | ** an optional thread as function's first argument and set 'arg' with | |||
| 91 | ** 1 if this argument is present (so that functions can skip it to | |||
| 92 | ** access their other arguments) | |||
| 93 | */ | |||
| 94 | ✗ | static lua_State *getthread (lua_State *L, int *arg) { | ||
| 95 | ✗ | if (lua_isthread(L, 1)) { | ||
| 96 | ✗ | *arg = 1; | ||
| 97 | ✗ | return lua_tothread(L, 1); | ||
| 98 | } | |||
| 99 | else { | |||
| 100 | ✗ | *arg = 0; | ||
| 101 | ✗ | return L; /* function will operate over current thread */ | ||
| 102 | } | |||
| 103 | } | |||
| 104 | ||||
| 105 | ||||
| 106 | /* | |||
| 107 | ** Variations of 'lua_settable', used by 'db_getinfo' to put results | |||
| 108 | ** from 'lua_getinfo' into result table. Key is always a string; | |||
| 109 | ** value can be a string, an int, or a boolean. | |||
| 110 | */ | |||
| 111 | ✗ | static void settabss (lua_State *L, const char *k, const char *v) { | ||
| 112 | ✗ | lua_pushstring(L, v); | ||
| 113 | ✗ | lua_setfield(L, -2, k); | ||
| 114 | ✗ | } | ||
| 115 | ||||
| 116 | ✗ | static void settabsi (lua_State *L, const char *k, int v) { | ||
| 117 | ✗ | lua_pushinteger(L, v); | ||
| 118 | ✗ | lua_setfield(L, -2, k); | ||
| 119 | ✗ | } | ||
| 120 | ||||
| 121 | ✗ | static void settabsb (lua_State *L, const char *k, int v) { | ||
| 122 | ✗ | lua_pushboolean(L, v); | ||
| 123 | ✗ | lua_setfield(L, -2, k); | ||
| 124 | ✗ | } | ||
| 125 | ||||
| 126 | ||||
| 127 | /* | |||
| 128 | ** In function 'db_getinfo', the call to 'lua_getinfo' may push | |||
| 129 | ** results on the stack; later it creates the result table to put | |||
| 130 | ** these objects. Function 'treatstackoption' puts the result from | |||
| 131 | ** 'lua_getinfo' on top of the result table so that it can call | |||
| 132 | ** 'lua_setfield'. | |||
| 133 | */ | |||
| 134 | ✗ | static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) { | ||
| 135 | ✗ | if (L == L1) | ||
| 136 | ✗ | lua_rotate(L, -2, 1); /* exchange object and table */ | ||
| 137 | else | |||
| 138 | ✗ | lua_xmove(L1, L, 1); /* move object to the "main" stack */ | ||
| 139 | ✗ | lua_setfield(L, -2, fname); /* put object into table */ | ||
| 140 | ✗ | } | ||
| 141 | ||||
| 142 | ||||
| 143 | /* | |||
| 144 | ** Calls 'lua_getinfo' and collects all results in a new table. | |||
| 145 | ** L1 needs stack space for an optional input (function) plus | |||
| 146 | ** two optional outputs (function and line table) from function | |||
| 147 | ** 'lua_getinfo'. | |||
| 148 | */ | |||
| 149 | ✗ | static int db_getinfo (lua_State *L) { | ||
| 150 | lua_Debug ar; | |||
| 151 | int arg; | |||
| 152 | ✗ | lua_State *L1 = getthread(L, &arg); | ||
| 153 | ✗ | const char *options = luaL_optstring(L, arg+2, "flnSrtu"); | ||
| 154 | ✗ | checkstack(L, L1, 3); | ||
| 155 | ✗ | luaL_argcheck(L, options[0] != '>', arg + 2, "invalid option '>'"); | ||
| 156 | ✗ | if (lua_isfunction(L, arg + 1)) { /* info about a function? */ | ||
| 157 | ✗ | options = lua_pushfstring(L, ">%s", options); /* add '>' to 'options' */ | ||
| 158 | ✗ | lua_pushvalue(L, arg + 1); /* move function to 'L1' stack */ | ||
| 159 | ✗ | lua_xmove(L, L1, 1); | ||
| 160 | } | |||
| 161 | else { /* stack level */ | |||
| 162 | ✗ | if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) { | ||
| 163 | ✗ | luaL_pushfail(L); /* level out of range */ | ||
| 164 | ✗ | return 1; | ||
| 165 | } | |||
| 166 | } | |||
| 167 | ✗ | if (!lua_getinfo(L1, options, &ar)) | ||
| 168 | ✗ | return luaL_argerror(L, arg+2, "invalid option"); | ||
| 169 | ✗ | lua_newtable(L); /* table to collect results */ | ||
| 170 | ✗ | if (strchr(options, 'S')) { | ||
| 171 | ✗ | lua_pushlstring(L, ar.source, ar.srclen); | ||
| 172 | ✗ | lua_setfield(L, -2, "source"); | ||
| 173 | ✗ | settabss(L, "short_src", ar.short_src); | ||
| 174 | ✗ | settabsi(L, "linedefined", ar.linedefined); | ||
| 175 | ✗ | settabsi(L, "lastlinedefined", ar.lastlinedefined); | ||
| 176 | ✗ | settabss(L, "what", ar.what); | ||
| 177 | } | |||
| 178 | ✗ | if (strchr(options, 'l')) | ||
| 179 | ✗ | settabsi(L, "currentline", ar.currentline); | ||
| 180 | ✗ | if (strchr(options, 'u')) { | ||
| 181 | ✗ | settabsi(L, "nups", ar.nups); | ||
| 182 | ✗ | settabsi(L, "nparams", ar.nparams); | ||
| 183 | ✗ | settabsb(L, "isvararg", ar.isvararg); | ||
| 184 | } | |||
| 185 | ✗ | if (strchr(options, 'n')) { | ||
| 186 | ✗ | settabss(L, "name", ar.name); | ||
| 187 | ✗ | settabss(L, "namewhat", ar.namewhat); | ||
| 188 | } | |||
| 189 | ✗ | if (strchr(options, 'r')) { | ||
| 190 | ✗ | settabsi(L, "ftransfer", ar.ftransfer); | ||
| 191 | ✗ | settabsi(L, "ntransfer", ar.ntransfer); | ||
| 192 | } | |||
| 193 | ✗ | if (strchr(options, 't')) | ||
| 194 | ✗ | settabsb(L, "istailcall", ar.istailcall); | ||
| 195 | ✗ | if (strchr(options, 'L')) | ||
| 196 | ✗ | treatstackoption(L, L1, "activelines"); | ||
| 197 | ✗ | if (strchr(options, 'f')) | ||
| 198 | ✗ | treatstackoption(L, L1, "func"); | ||
| 199 | ✗ | return 1; /* return table */ | ||
| 200 | } | |||
| 201 | ||||
| 202 | ||||
| 203 | ✗ | static int db_getlocal (lua_State *L) { | ||
| 204 | int arg; | |||
| 205 | ✗ | lua_State *L1 = getthread(L, &arg); | ||
| 206 | ✗ | int nvar = (int)luaL_checkinteger(L, arg + 2); /* local-variable index */ | ||
| 207 | ✗ | if (lua_isfunction(L, arg + 1)) { /* function argument? */ | ||
| 208 | ✗ | lua_pushvalue(L, arg + 1); /* push function */ | ||
| 209 | ✗ | lua_pushstring(L, lua_getlocal(L, NULL, nvar)); /* push local name */ | ||
| 210 | ✗ | return 1; /* return only name (there is no value) */ | ||
| 211 | } | |||
| 212 | else { /* stack-level argument */ | |||
| 213 | lua_Debug ar; | |||
| 214 | const char *name; | |||
| 215 | ✗ | int level = (int)luaL_checkinteger(L, arg + 1); | ||
| 216 | ✗ | if (l_unlikely(!lua_getstack(L1, level, &ar))) /* out of range? */ | ||
| 217 | ✗ | return luaL_argerror(L, arg+1, "level out of range"); | ||
| 218 | ✗ | checkstack(L, L1, 1); | ||
| 219 | ✗ | name = lua_getlocal(L1, &ar, nvar); | ||
| 220 | ✗ | if (name) { | ||
| 221 | ✗ | lua_xmove(L1, L, 1); /* move local value */ | ||
| 222 | ✗ | lua_pushstring(L, name); /* push name */ | ||
| 223 | ✗ | lua_rotate(L, -2, 1); /* re-order */ | ||
| 224 | ✗ | return 2; | ||
| 225 | } | |||
| 226 | else { | |||
| 227 | ✗ | luaL_pushfail(L); /* no name (nor value) */ | ||
| 228 | ✗ | return 1; | ||
| 229 | } | |||
| 230 | } | |||
| 231 | } | |||
| 232 | ||||
| 233 | ||||
| 234 | ✗ | static int db_setlocal (lua_State *L) { | ||
| 235 | int arg; | |||
| 236 | const char *name; | |||
| 237 | ✗ | lua_State *L1 = getthread(L, &arg); | ||
| 238 | lua_Debug ar; | |||
| 239 | ✗ | int level = (int)luaL_checkinteger(L, arg + 1); | ||
| 240 | ✗ | int nvar = (int)luaL_checkinteger(L, arg + 2); | ||
| 241 | ✗ | if (l_unlikely(!lua_getstack(L1, level, &ar))) /* out of range? */ | ||
| 242 | ✗ | return luaL_argerror(L, arg+1, "level out of range"); | ||
| 243 | ✗ | luaL_checkany(L, arg+3); | ||
| 244 | ✗ | lua_settop(L, arg+3); | ||
| 245 | ✗ | checkstack(L, L1, 1); | ||
| 246 | ✗ | lua_xmove(L, L1, 1); | ||
| 247 | ✗ | name = lua_setlocal(L1, &ar, nvar); | ||
| 248 | ✗ | if (name == NULL) | ||
| 249 | ✗ | lua_pop(L1, 1); /* pop value (if not popped by 'lua_setlocal') */ | ||
| 250 | ✗ | lua_pushstring(L, name); | ||
| 251 | ✗ | return 1; | ||
| 252 | } | |||
| 253 | ||||
| 254 | ||||
| 255 | /* | |||
| 256 | ** get (if 'get' is true) or set an upvalue from a closure | |||
| 257 | */ | |||
| 258 | ✗ | static int auxupvalue (lua_State *L, int get) { | ||
| 259 | const char *name; | |||
| 260 | ✗ | int n = (int)luaL_checkinteger(L, 2); /* upvalue index */ | ||
| 261 | ✗ | luaL_checktype(L, 1, LUA_TFUNCTION); /* closure */ | ||
| 262 | ✗ | name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n); | ||
| 263 | ✗ | if (name == NULL) return 0; | ||
| 264 | ✗ | lua_pushstring(L, name); | ||
| 265 | ✗ | lua_insert(L, -(get+1)); /* no-op if get is false */ | ||
| 266 | ✗ | return get + 1; | ||
| 267 | } | |||
| 268 | ||||
| 269 | ||||
| 270 | ✗ | static int db_getupvalue (lua_State *L) { | ||
| 271 | ✗ | return auxupvalue(L, 1); | ||
| 272 | } | |||
| 273 | ||||
| 274 | ||||
| 275 | ✗ | static int db_setupvalue (lua_State *L) { | ||
| 276 | ✗ | luaL_checkany(L, 3); | ||
| 277 | ✗ | return auxupvalue(L, 0); | ||
| 278 | } | |||
| 279 | ||||
| 280 | ||||
| 281 | /* | |||
| 282 | ** Check whether a given upvalue from a given closure exists and | |||
| 283 | ** returns its index | |||
| 284 | */ | |||
| 285 | ✗ | static void *checkupval (lua_State *L, int argf, int argnup, int *pnup) { | ||
| 286 | void *id; | |||
| 287 | ✗ | int nup = (int)luaL_checkinteger(L, argnup); /* upvalue index */ | ||
| 288 | ✗ | luaL_checktype(L, argf, LUA_TFUNCTION); /* closure */ | ||
| 289 | ✗ | id = lua_upvalueid(L, argf, nup); | ||
| 290 | ✗ | if (pnup) { | ||
| 291 | ✗ | luaL_argcheck(L, id != NULL, argnup, "invalid upvalue index"); | ||
| 292 | ✗ | *pnup = nup; | ||
| 293 | } | |||
| 294 | ✗ | return id; | ||
| 295 | } | |||
| 296 | ||||
| 297 | ||||
| 298 | ✗ | static int db_upvalueid (lua_State *L) { | ||
| 299 | ✗ | void *id = checkupval(L, 1, 2, NULL); | ||
| 300 | ✗ | if (id != NULL) | ||
| 301 | ✗ | lua_pushlightuserdata(L, id); | ||
| 302 | else | |||
| 303 | ✗ | luaL_pushfail(L); | ||
| 304 | ✗ | return 1; | ||
| 305 | } | |||
| 306 | ||||
| 307 | ||||
| 308 | ✗ | static int db_upvaluejoin (lua_State *L) { | ||
| 309 | int n1, n2; | |||
| 310 | ✗ | checkupval(L, 1, 2, &n1); | ||
| 311 | ✗ | checkupval(L, 3, 4, &n2); | ||
| 312 | ✗ | luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected"); | ||
| 313 | ✗ | luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected"); | ||
| 314 | ✗ | lua_upvaluejoin(L, 1, n1, 3, n2); | ||
| 315 | ✗ | return 0; | ||
| 316 | } | |||
| 317 | ||||
| 318 | ||||
| 319 | /* | |||
| 320 | ** Call hook function registered at hook table for the current | |||
| 321 | ** thread (if there is one) | |||
| 322 | */ | |||
| 323 | ✗ | static void hookf (lua_State *L, lua_Debug *ar) { | ||
| 324 | static const char *const hooknames[] = | |||
| 325 | {"call", "return", "line", "count", "tail call"}; | |||
| 326 | ✗ | lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY); | ||
| 327 | ✗ | lua_pushthread(L); | ||
| 328 | ✗ | if (lua_rawget(L, -2) == LUA_TFUNCTION) { /* is there a hook function? */ | ||
| 329 | ✗ | lua_pushstring(L, hooknames[(int)ar->event]); /* push event name */ | ||
| 330 | ✗ | if (ar->currentline >= 0) | ||
| 331 | ✗ | lua_pushinteger(L, ar->currentline); /* push current line */ | ||
| 332 | ✗ | else lua_pushnil(L); | ||
| 333 | lua_assert(lua_getinfo(L, "lS", ar)); | |||
| 334 | ✗ | lua_call(L, 2, 0); /* call hook function */ | ||
| 335 | } | |||
| 336 | ✗ | } | ||
| 337 | ||||
| 338 | ||||
| 339 | /* | |||
| 340 | ** Convert a string mask (for 'sethook') into a bit mask | |||
| 341 | */ | |||
| 342 | ✗ | static int makemask (const char *smask, int count) { | ||
| 343 | ✗ | int mask = 0; | ||
| 344 | ✗ | if (strchr(smask, 'c')) mask |= LUA_MASKCALL; | ||
| 345 | ✗ | if (strchr(smask, 'r')) mask |= LUA_MASKRET; | ||
| 346 | ✗ | if (strchr(smask, 'l')) mask |= LUA_MASKLINE; | ||
| 347 | ✗ | if (count > 0) mask |= LUA_MASKCOUNT; | ||
| 348 | ✗ | return mask; | ||
| 349 | } | |||
| 350 | ||||
| 351 | ||||
| 352 | /* | |||
| 353 | ** Convert a bit mask (for 'gethook') into a string mask | |||
| 354 | */ | |||
| 355 | ✗ | static char *unmakemask (int mask, char *smask) { | ||
| 356 | ✗ | int i = 0; | ||
| 357 | ✗ | if (mask & LUA_MASKCALL) smask[i++] = 'c'; | ||
| 358 | ✗ | if (mask & LUA_MASKRET) smask[i++] = 'r'; | ||
| 359 | ✗ | if (mask & LUA_MASKLINE) smask[i++] = 'l'; | ||
| 360 | ✗ | smask[i] = '\0'; | ||
| 361 | ✗ | return smask; | ||
| 362 | } | |||
| 363 | ||||
| 364 | ||||
| 365 | ✗ | static int db_sethook (lua_State *L) { | ||
| 366 | int arg, mask, count; | |||
| 367 | lua_Hook func; | |||
| 368 | ✗ | lua_State *L1 = getthread(L, &arg); | ||
| 369 | ✗ | if (lua_isnoneornil(L, arg+1)) { /* no hook? */ | ||
| 370 | ✗ | lua_settop(L, arg+1); | ||
| 371 | ✗ | func = NULL; mask = 0; count = 0; /* turn off hooks */ | ||
| 372 | } | |||
| 373 | else { | |||
| 374 | ✗ | const char *smask = luaL_checkstring(L, arg+2); | ||
| 375 | ✗ | luaL_checktype(L, arg+1, LUA_TFUNCTION); | ||
| 376 | ✗ | count = (int)luaL_optinteger(L, arg + 3, 0); | ||
| 377 | ✗ | func = hookf; mask = makemask(smask, count); | ||
| 378 | } | |||
| 379 | ✗ | if (!luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY)) { | ||
| 380 | /* table just created; initialize it */ | |||
| 381 | ✗ | lua_pushliteral(L, "k"); | ||
| 382 | ✗ | lua_setfield(L, -2, "__mode"); /** hooktable.__mode = "k" */ | ||
| 383 | ✗ | lua_pushvalue(L, -1); | ||
| 384 | ✗ | lua_setmetatable(L, -2); /* metatable(hooktable) = hooktable */ | ||
| 385 | } | |||
| 386 | ✗ | checkstack(L, L1, 1); | ||
| 387 | ✗ | lua_pushthread(L1); lua_xmove(L1, L, 1); /* key (thread) */ | ||
| 388 | ✗ | lua_pushvalue(L, arg + 1); /* value (hook function) */ | ||
| 389 | ✗ | lua_rawset(L, -3); /* hooktable[L1] = new Lua hook */ | ||
| 390 | ✗ | lua_sethook(L1, func, mask, count); | ||
| 391 | ✗ | return 0; | ||
| 392 | } | |||
| 393 | ||||
| 394 | ||||
| 395 | ✗ | static int db_gethook (lua_State *L) { | ||
| 396 | int arg; | |||
| 397 | ✗ | lua_State *L1 = getthread(L, &arg); | ||
| 398 | char buff[5]; | |||
| 399 | ✗ | int mask = lua_gethookmask(L1); | ||
| 400 | ✗ | lua_Hook hook = lua_gethook(L1); | ||
| 401 | ✗ | if (hook == NULL) { /* no hook? */ | ||
| 402 | ✗ | luaL_pushfail(L); | ||
| 403 | ✗ | return 1; | ||
| 404 | } | |||
| 405 | ✗ | else if (hook != hookf) /* external hook? */ | ||
| 406 | ✗ | lua_pushliteral(L, "external hook"); | ||
| 407 | else { /* hook table must exist */ | |||
| 408 | ✗ | lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY); | ||
| 409 | ✗ | checkstack(L, L1, 1); | ||
| 410 | ✗ | lua_pushthread(L1); lua_xmove(L1, L, 1); | ||
| 411 | ✗ | lua_rawget(L, -2); /* 1st result = hooktable[L1] */ | ||
| 412 | ✗ | lua_remove(L, -2); /* remove hook table */ | ||
| 413 | } | |||
| 414 | ✗ | lua_pushstring(L, unmakemask(mask, buff)); /* 2nd result = mask */ | ||
| 415 | ✗ | lua_pushinteger(L, lua_gethookcount(L1)); /* 3rd result = count */ | ||
| 416 | ✗ | return 3; | ||
| 417 | } | |||
| 418 | ||||
| 419 | ||||
| 420 | ✗ | static int db_debug (lua_State *L) { | ||
| 421 | ✗ | for (;;) { | ||
| 422 | char buffer[250]; | |||
| 423 | ✗ | lua_writestringerror("%s", "lua_debug> "); | ||
| 424 | ✗ | if (fgets(buffer, sizeof(buffer), stdin) == NULL || | ||
| 425 | ✗ | strcmp(buffer, "cont\n") == 0) | ||
| 426 | ✗ | return 0; | ||
| 427 | ✗ | if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") || | ||
| 428 | ✗ | lua_pcall(L, 0, 0, 0)) | ||
| 429 | ✗ | lua_writestringerror("%s\n", luaL_tolstring(L, -1, NULL)); | ||
| 430 | ✗ | lua_settop(L, 0); /* remove eventual returns */ | ||
| 431 | } | |||
| 432 | } | |||
| 433 | ||||
| 434 | ||||
| 435 | ✗ | static int db_traceback (lua_State *L) { | ||
| 436 | int arg; | |||
| 437 | ✗ | lua_State *L1 = getthread(L, &arg); | ||
| 438 | ✗ | const char *msg = lua_tostring(L, arg + 1); | ||
| 439 | ✗ | if (msg == NULL && !lua_isnoneornil(L, arg + 1)) /* non-string 'msg'? */ | ||
| 440 | ✗ | lua_pushvalue(L, arg + 1); /* return it untouched */ | ||
| 441 | else { | |||
| 442 | ✗ | int level = (int)luaL_optinteger(L, arg + 2, (L == L1) ? 1 : 0); | ||
| 443 | ✗ | luaL_traceback(L, L1, msg, level); | ||
| 444 | } | |||
| 445 | ✗ | return 1; | ||
| 446 | } | |||
| 447 | ||||
| 448 | ||||
| 449 | ✗ | static int db_setcstacklimit (lua_State *L) { | ||
| 450 | ✗ | int limit = (int)luaL_checkinteger(L, 1); | ||
| 451 | ✗ | int res = lua_setcstacklimit(L, limit); | ||
| 452 | ✗ | lua_pushinteger(L, res); | ||
| 453 | ✗ | return 1; | ||
| 454 | } | |||
| 455 | ||||
| 456 | ||||
| 457 | static const luaL_Reg dblib[] = { | |||
| 458 | {"debug", db_debug}, | |||
| 459 | {"getuservalue", db_getuservalue}, | |||
| 460 | {"gethook", db_gethook}, | |||
| 461 | {"getinfo", db_getinfo}, | |||
| 462 | {"getlocal", db_getlocal}, | |||
| 463 | {"getregistry", db_getregistry}, | |||
| 464 | {"getmetatable", db_getmetatable}, | |||
| 465 | {"getupvalue", db_getupvalue}, | |||
| 466 | {"upvaluejoin", db_upvaluejoin}, | |||
| 467 | {"upvalueid", db_upvalueid}, | |||
| 468 | {"setuservalue", db_setuservalue}, | |||
| 469 | {"sethook", db_sethook}, | |||
| 470 | {"setlocal", db_setlocal}, | |||
| 471 | {"setmetatable", db_setmetatable}, | |||
| 472 | {"setupvalue", db_setupvalue}, | |||
| 473 | {"traceback", db_traceback}, | |||
| 474 | {"setcstacklimit", db_setcstacklimit}, | |||
| 475 | {NULL, NULL} | |||
| 476 | }; | |||
| 477 | ||||
| 478 | ||||
| 479 | ✗ | LUAMOD_API int luaopen_debug (lua_State *L) { | ||
| 480 | ✗ | luaL_newlib(L, dblib); | ||
| 481 | ✗ | return 1; | ||
| 482 | } | |||
| 483 | ||||
| 484 |