/* ** $Id: ltests.c $ ** Internal Module for Debugging of the Lua Implementation ** See Copyright Notice in lua.h */ #define ltests_c #define LUA_CORE #include "lprefix.h" #include #include #include #include #include #include "lua.h" #include "lapi.h" #include "lauxlib.h" #include "lcode.h" #include "lctype.h" #include "ldebug.h" #include "ldo.h" #include "lfunc.h" #include "lmem.h" #include "lopcodes.h" #include "lopnames.h" #include "lstate.h" #include "lstring.h" #include "ltable.h" #include "lualib.h" /* ** The whole module only makes sense with LUA_DEBUG on */ #if defined(LUA_DEBUG) void *l_Trick = 0; #define obj_at(L,k) s2v(L->ci->func.p + (k)) static int runC (lua_State *L, lua_State *L1, const char *pc); static void setnameval (lua_State *L, const char *name, int val) { lua_pushinteger(L, val); lua_setfield(L, -2, name); } static void pushobject (lua_State *L, const TValue *o) { setobj2s(L, L->top.p, o); api_incr_top(L); } static void badexit (const char *fmt, const char *s1, const char *s2) { fprintf(stderr, fmt, s1); if (s2) fprintf(stderr, "extra info: %s\n", s2); /* avoid assertion failures when exiting */ l_memcontrol.numblocks = l_memcontrol.total = 0; exit(EXIT_FAILURE); } static int tpanic (lua_State *L) { const char *msg = lua_tostring(L, -1); if (msg == NULL) msg = "error object is not a string"; return (badexit("PANIC: unprotected error in call to Lua API (%s)\n", msg, NULL), 0); /* do not return to Lua */ } /* ** Warning function for tests. First, it concatenates all parts of ** a warning in buffer 'buff'. Then, it has three modes: ** - 0.normal: messages starting with '#' are shown on standard output; ** - other messages abort the tests (they represent real warning ** conditions; the standard tests should not generate these conditions ** unexpectedly); ** - 1.allow: all messages are shown; ** - 2.store: all warnings go to the global '_WARN'; */ static void warnf (void *ud, const char *msg, int tocont) { lua_State *L = cast(lua_State *, ud); static char buff[200] = ""; /* should be enough for tests... */ static int onoff = 0; static int mode = 0; /* start in normal mode */ static int lasttocont = 0; if (!lasttocont && !tocont && *msg == '@') { /* control message? */ if (buff[0] != '\0') badexit("Control warning during warning: %s\naborting...\n", msg, buff); if (strcmp(msg, "@off") == 0) onoff = 0; else if (strcmp(msg, "@on") == 0) onoff = 1; else if (strcmp(msg, "@normal") == 0) mode = 0; else if (strcmp(msg, "@allow") == 0) mode = 1; else if (strcmp(msg, "@store") == 0) mode = 2; else badexit("Invalid control warning in test mode: %s\naborting...\n", msg, NULL); return; } lasttocont = tocont; if (strlen(msg) >= sizeof(buff) - strlen(buff)) badexit("warnf-buffer overflow (%s)\n", msg, buff); strcat(buff, msg); /* add new message to current warning */ if (!tocont) { /* message finished? */ lua_unlock(L); luaL_checkstack(L, 1, "warn stack space"); lua_getglobal(L, "_WARN"); if (!lua_toboolean(L, -1)) lua_pop(L, 1); /* ok, no previous unexpected warning */ else { badexit("Unhandled warning in store mode: %s\naborting...\n", lua_tostring(L, -1), buff); } lua_lock(L); switch (mode) { case 0: { /* normal */ if (buff[0] != '#' && onoff) /* unexpected warning? */ badexit("Unexpected warning in test mode: %s\naborting...\n", buff, NULL); } /* FALLTHROUGH */ case 1: { /* allow */ if (onoff) fprintf(stderr, "Lua warning: %s\n", buff); /* print warning */ break; } case 2: { /* store */ lua_unlock(L); luaL_checkstack(L, 1, "warn stack space"); lua_pushstring(L, buff); lua_setglobal(L, "_WARN"); /* assign message to global '_WARN' */ lua_lock(L); break; } } buff[0] = '\0'; /* prepare buffer for next warning */ } } /* ** {====================================================================== ** Controlled version for realloc. ** ======================================================================= */ #define MARK 0x55 /* 01010101 (a nice pattern) */ typedef union Header { LUAI_MAXALIGN; struct { size_t size; int type; } d; } Header; #if !defined(EXTERNMEMCHECK) /* full memory check */ #define MARKSIZE 16 /* size of marks after each block */ #define fillmem(mem,size) memset(mem, -MARK, size) #else /* external memory check: don't do it twice */ #define MARKSIZE 0 #define fillmem(mem,size) /* empty */ #endif Memcontrol l_memcontrol = {0, 0UL, 0UL, 0UL, 0UL, (~0UL), {0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL}}; static void freeblock (Memcontrol *mc, Header *block) { if (block) { size_t size = block->d.size; int i; for (i = 0; i < MARKSIZE; i++) /* check marks after block */ lua_assert(*(cast_charp(block + 1) + size + i) == MARK); mc->objcount[block->d.type]--; fillmem(block, sizeof(Header) + size + MARKSIZE); /* erase block */ free(block); /* actually free block */ mc->numblocks--; /* update counts */ mc->total -= size; } } void *debug_realloc (void *ud, void *b, size_t oldsize, size_t size) { Memcontrol *mc = cast(Memcontrol *, ud); Header *block = cast(Header *, b); int type; if (mc->memlimit == 0) { /* first time? */ char *limit = getenv("MEMLIMIT"); /* initialize memory limit */ mc->memlimit = limit ? strtoul(limit, NULL, 10) : ULONG_MAX; } if (block == NULL) { type = (oldsize < LUA_NUMTAGS) ? oldsize : 0; oldsize = 0; } else { block--; /* go to real header */ type = block->d.type; lua_assert(oldsize == block->d.size); } if (size == 0) { freeblock(mc, block); return NULL; } if (mc->failnext) { mc->failnext = 0; return NULL; /* fake a single memory allocation error */ } if (mc->countlimit != ~0UL && size != oldsize) { /* count limit in use? */ if (mc->countlimit == 0) return NULL; /* fake a memory allocation error */ mc->countlimit--; } if (size > oldsize && mc->total+size-oldsize > mc->memlimit) return NULL; /* fake a memory allocation error */ else { Header *newblock; int i; size_t commonsize = (oldsize < size) ? oldsize : size; size_t realsize = sizeof(Header) + size + MARKSIZE; if (realsize < size) return NULL; /* arithmetic overflow! */ newblock = cast(Header *, malloc(realsize)); /* alloc a new block */ if (newblock == NULL) return NULL; /* really out of memory? */ if (block) { memcpy(newblock + 1, block + 1, commonsize); /* copy old contents */ freeblock(mc, block); /* erase (and check) old copy */ } /* initialize new part of the block with something weird */ fillmem(cast_charp(newblock + 1) + commonsize, size - commonsize); /* initialize marks after block */ for (i = 0; i < MARKSIZE; i++) *(cast_charp(newblock + 1) + size + i) = MARK; newblock->d.size = size; newblock->d.type = type; mc->total += size; if (mc->total > mc->maxmem) mc->maxmem = mc->total; mc->numblocks++; mc->objcount[type]++; return newblock + 1; } } /* }====================================================================== */ /* ** {===================================================================== ** Functions to check memory consistency. ** Most of these checks are done through asserts, so this code does ** not make sense with asserts off. For this reason, it uses 'assert' ** directly, instead of 'lua_assert'. ** ====================================================================== */ #include /* ** Check GC invariants. For incremental mode, a black object cannot ** point to a white one. For generational mode, really old objects ** cannot point to young objects. Both old1 and touched2 objects ** cannot point to new objects (but can point to survivals). ** (Threads and open upvalues, despite being marked "really old", ** continue to be visited in all collections, and therefore can point to ** new objects. They, and only they, are old but gray.) */ static int testobjref1 (global_State *g, GCObject *f, GCObject *t) { if (isdead(g,t)) return 0; if (issweepphase(g)) return 1; /* no invariants */ else if (g->gckind == KGC_INC) return !(isblack(f) && iswhite(t)); /* basic incremental invariant */ else { /* generational mode */ if ((getage(f) == G_OLD && isblack(f)) && !isold(t)) return 0; if (((getage(f) == G_OLD1 || getage(f) == G_TOUCHED2) && isblack(f)) && getage(t) == G_NEW) return 0; return 1; } } static void printobj (global_State *g, GCObject *o) { printf("||%s(%p)-%c%c(%02X)||", ttypename(novariant(o->tt)), (void *)o, isdead(g,o) ? 'd' : isblack(o) ? 'b' : iswhite(o) ? 'w' : 'g', "ns01oTt"[getage(o)], o->marked); if (o->tt == LUA_VSHRSTR || o->tt == LUA_VLNGSTR) printf(" '%s'", getstr(gco2ts(o))); } void lua_printobj (lua_State *L, struct GCObject *o) { printobj(G(L), o); } static int testobjref (global_State *g, GCObject *f, GCObject *t) { int r1 = testobjref1(g, f, t); if (!r1) { printf("%d(%02X) - ", g->gcstate, g->currentwhite); printobj(g, f); printf(" -> "); printobj(g, t); printf("\n"); } return r1; } static void checkobjref (global_State *g, GCObject *f, GCObject *t) { assert(testobjref(g, f, t)); } /* ** Version where 't' can be NULL. In that case, it should not apply the ** macro 'obj2gco' over the object. ('t' may have several types, so this ** definition must be a macro.) Most checks need this version, because ** the check may run while an object is still being created. */ #define checkobjrefN(g,f,t) { if (t) checkobjref(g,f,obj2gco(t)); } static void checkvalref (global_State *g, GCObject *f, const TValue *t) { assert(!iscollectable(t) || (righttt(t) && testobjref(g, f, gcvalue(t)))); } static void checktable (global_State *g, Table *h) { unsigned int i; unsigned int asize = luaH_realasize(h); Node *n, *limit = gnode(h, sizenode(h)); GCObject *hgc = obj2gco(h); checkobjrefN(g, hgc, h->metatable); for (i = 0; i < asize; i++) checkvalref(g, hgc, &h->array[i]); for (n = gnode(h, 0); n < limit; n++) { if (!isempty(gval(n))) { TValue k; getnodekey(g->mainthread, &k, n); assert(!keyisnil(n)); checkvalref(g, hgc, &k); checkvalref(g, hgc, gval(n)); } } } static void checkudata (global_State *g, Udata *u) { int i; GCObject *hgc = obj2gco(u); checkobjrefN(g, hgc, u->metatable); for (i = 0; i < u->nuvalue; i++) checkvalref(g, hgc, &u->uv[i].uv); } static void checkproto (global_State *g, Proto *f) { int i; GCObject *fgc = obj2gco(f); checkobjrefN(g, fgc, f->source); for (i=0; isizek; i++) { if (iscollectable(f->k + i)) checkobjref(g, fgc, gcvalue(f->k + i)); } for (i=0; isizeupvalues; i++) checkobjrefN(g, fgc, f->upvalues[i].name); for (i=0; isizep; i++) checkobjrefN(g, fgc, f->p[i]); for (i=0; isizelocvars; i++) checkobjrefN(g, fgc, f->locvars[i].varname); } static void checkCclosure (global_State *g, CClosure *cl) { GCObject *clgc = obj2gco(cl); int i; for (i = 0; i < cl->nupvalues; i++) checkvalref(g, clgc, &cl->upvalue[i]); } static void checkLclosure (global_State *g, LClosure *cl) { GCObject *clgc = obj2gco(cl); int i; checkobjrefN(g, clgc, cl->p); for (i=0; inupvalues; i++) { UpVal *uv = cl->upvals[i]; if (uv) { checkobjrefN(g, clgc, uv); if (!upisopen(uv)) checkvalref(g, obj2gco(uv), uv->v.p); } } } static int lua_checkpc (CallInfo *ci) { if (!isLua(ci)) return 1; else { StkId f = ci->func.p; Proto *p = clLvalue(s2v(f))->p; return p->code <= ci->u.l.savedpc && ci->u.l.savedpc <= p->code + p->sizecode; } } static void checkstack (global_State *g, lua_State *L1) { StkId o; CallInfo *ci; UpVal *uv; assert(!isdead(g, L1)); if (L1->stack.p == NULL) { /* incomplete thread? */ assert(L1->openupval == NULL && L1->ci == NULL); return; } for (uv = L1->openupval; uv != NULL; uv = uv->u.open.next) assert(upisopen(uv)); /* must be open */ assert(L1->top.p <= L1->stack_last.p); assert(L1->tbclist.p <= L1->top.p); for (ci = L1->ci; ci != NULL; ci = ci->previous) { assert(ci->top.p <= L1->stack_last.p); assert(lua_checkpc(ci)); } for (o = L1->stack.p; o < L1->stack_last.p; o++) checkliveness(L1, s2v(o)); /* entire stack must have valid values */ } static void checkrefs (global_State *g, GCObject *o) { switch (o->tt) { case LUA_VUSERDATA: { checkudata(g, gco2u(o)); break; } case LUA_VUPVAL: { checkvalref(g, o, gco2upv(o)->v.p); break; } case LUA_VTABLE: { checktable(g, gco2t(o)); break; } case LUA_VTHREAD: { checkstack(g, gco2th(o)); break; } case LUA_VLCL: { checkLclosure(g, gco2lcl(o)); break; } case LUA_VCCL: { checkCclosure(g, gco2ccl(o)); break; } case LUA_VPROTO: { checkproto(g, gco2p(o)); break; } case LUA_VSHRSTR: case LUA_VLNGSTR: { assert(!isgray(o)); /* strings are never gray */ break; } default: assert(0); } } /* ** Check consistency of an object: ** - Dead objects can only happen in the 'allgc' list during a sweep ** phase (controlled by the caller through 'maybedead'). ** - During pause, all objects must be white. ** - In generational mode: ** * objects must be old enough for their lists ('listage'). ** * old objects cannot be white. ** * old objects must be black, except for 'touched1', 'old0', ** threads, and open upvalues. */ static void checkobject (global_State *g, GCObject *o, int maybedead, int listage) { if (isdead(g, o)) assert(maybedead); else { assert(g->gcstate != GCSpause || iswhite(o)); if (g->gckind == KGC_GEN) { /* generational mode? */ assert(getage(o) >= listage); assert(!iswhite(o) || !isold(o)); if (isold(o)) { assert(isblack(o) || getage(o) == G_TOUCHED1 || getage(o) == G_OLD0 || o->tt == LUA_VTHREAD || (o->tt == LUA_VUPVAL && upisopen(gco2upv(o)))); } } checkrefs(g, o); } } static lu_mem checkgraylist (global_State *g, GCObject *o) { int total = 0; /* count number of elements in the list */ cast_void(g); /* better to keep it if we need to print an object */ while (o) { assert(!!isgray(o) ^ (getage(o) == G_TOUCHED2)); assert(!testbit(o->marked, TESTBIT)); if (keepinvariant(g)) l_setbit(o->marked, TESTBIT); /* mark that object is in a gray list */ total++; switch (o->tt) { case LUA_VTABLE: o = gco2t(o)->gclist; break; case LUA_VLCL: o = gco2lcl(o)->gclist; break; case LUA_VCCL: o = gco2ccl(o)->gclist; break; case LUA_VTHREAD: o = gco2th(o)->gclist; break; case LUA_VPROTO: o = gco2p(o)->gclist; break; case LUA_VUSERDATA: assert(gco2u(o)->nuvalue > 0); o = gco2u(o)->gclist; break; default: assert(0); /* other objects cannot be in a gray list */ } } return total; } /* ** Check objects in gray lists. */ static lu_mem checkgrays (global_State *g) { int total = 0; /* count number of elements in all lists */ if (!keepinvariant(g)) return total; total += checkgraylist(g, g->gray); total += checkgraylist(g, g->grayagain); total += checkgraylist(g, g->weak); total += checkgraylist(g, g->allweak); total += checkgraylist(g, g->ephemeron); return total; } /* ** Check whether 'o' should be in a gray list. If so, increment ** 'count' and check its TESTBIT. (It must have been previously set by ** 'checkgraylist'.) */ static void incifingray (global_State *g, GCObject *o, lu_mem *count) { if (!keepinvariant(g)) return; /* gray lists not being kept in these phases */ if (o->tt == LUA_VUPVAL) { /* only open upvalues can be gray */ assert(!isgray(o) || upisopen(gco2upv(o))); return; /* upvalues are never in gray lists */ } /* these are the ones that must be in gray lists */ if (isgray(o) || getage(o) == G_TOUCHED2) { (*count)++; assert(testbit(o->marked, TESTBIT)); resetbit(o->marked, TESTBIT); /* prepare for next cycle */ } } static lu_mem checklist (global_State *g, int maybedead, int tof, GCObject *newl, GCObject *survival, GCObject *old, GCObject *reallyold) { GCObject *o; lu_mem total = 0; /* number of object that should be in gray lists */ for (o = newl; o != survival; o = o->next) { checkobject(g, o, maybedead, G_NEW); incifingray(g, o, &total); assert(!tof == !tofinalize(o)); } for (o = survival; o != old; o = o->next) { checkobject(g, o, 0, G_SURVIVAL); incifingray(g, o, &total); assert(!tof == !tofinalize(o)); } for (o = old; o != reallyold; o = o->next) { checkobject(g, o, 0, G_OLD1); incifingray(g, o, &total); assert(!tof == !tofinalize(o)); } for (o = reallyold; o != NULL; o = o->next) { checkobject(g, o, 0, G_OLD); incifingray(g, o, &total); assert(!tof == !tofinalize(o)); } return total; } int lua_checkmemory (lua_State *L) { global_State *g = G(L); GCObject *o; int maybedead; lu_mem totalin; /* total of objects that are in gray lists */ lu_mem totalshould; /* total of objects that should be in gray lists */ if (keepinvariant(g)) { assert(!iswhite(g->mainthread)); assert(!iswhite(gcvalue(&g->l_registry))); } assert(!isdead(g, gcvalue(&g->l_registry))); assert(g->sweepgc == NULL || issweepphase(g)); totalin = checkgrays(g); /* check 'fixedgc' list */ for (o = g->fixedgc; o != NULL; o = o->next) { assert(o->tt == LUA_VSHRSTR && isgray(o) && getage(o) == G_OLD); } /* check 'allgc' list */ maybedead = (GCSatomic < g->gcstate && g->gcstate <= GCSswpallgc); totalshould = checklist(g, maybedead, 0, g->allgc, g->survival, g->old1, g->reallyold); /* check 'finobj' list */ totalshould += checklist(g, 0, 1, g->finobj, g->finobjsur, g->finobjold1, g->finobjrold); /* check 'tobefnz' list */ for (o = g->tobefnz; o != NULL; o = o->next) { checkobject(g, o, 0, G_NEW); incifingray(g, o, &totalshould); assert(tofinalize(o)); assert(o->tt == LUA_VUSERDATA || o->tt == LUA_VTABLE); } if (keepinvariant(g)) assert(totalin == totalshould); return 0; } /* }====================================================== */ /* ** {====================================================== ** Disassembler ** ======================================================= */ static char *buildop (Proto *p, int pc, char *buff) { char *obuff = buff; Instruction i = p->code[pc]; OpCode o = GET_OPCODE(i); const char *name = opnames[o]; int line = luaG_getfuncline(p, pc); int lineinfo = (p->lineinfo != NULL) ? p->lineinfo[pc] : 0; if (lineinfo == ABSLINEINFO) buff += sprintf(buff, "(__"); else buff += sprintf(buff, "(%2d", lineinfo); buff += sprintf(buff, " - %4d) %4d - ", line, pc); switch (getOpMode(o)) { case iABC: sprintf(buff, "%-12s%4d %4d %4d%s", name, GETARG_A(i), GETARG_B(i), GETARG_C(i), GETARG_k(i) ? " (k)" : ""); break; case iABx: sprintf(buff, "%-12s%4d %4d", name, GETARG_A(i), GETARG_Bx(i)); break; case iAsBx: sprintf(buff, "%-12s%4d %4d", name, GETARG_A(i), GETARG_sBx(i)); break; case iAx: sprintf(buff, "%-12s%4d", name, GETARG_Ax(i)); break; case isJ: sprintf(buff, "%-12s%4d", name, GETARG_sJ(i)); break; } return obuff; } #if 0 void luaI_printcode (Proto *pt, int size) { int pc; for (pc=0; pcmaxstacksize); setnameval(L, "numparams", p->numparams); for (pc=0; pcsizecode; pc++) { char buff[100]; lua_pushinteger(L, pc+1); lua_pushstring(L, buildop(p, pc, buff)); lua_settable(L, -3); } return 1; } static int printcode (lua_State *L) { int pc; Proto *p; luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1, "Lua function expected"); p = getproto(obj_at(L, 1)); printf("maxstack: %d\n", p->maxstacksize); printf("numparams: %d\n", p->numparams); for (pc=0; pcsizecode; pc++) { char buff[100]; printf("%s\n", buildop(p, pc, buff)); } return 0; } static int listk (lua_State *L) { Proto *p; int i; luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1, "Lua function expected"); p = getproto(obj_at(L, 1)); lua_createtable(L, p->sizek, 0); for (i=0; isizek; i++) { pushobject(L, p->k+i); lua_rawseti(L, -2, i+1); } return 1; } static int listabslineinfo (lua_State *L) { Proto *p; int i; luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1, "Lua function expected"); p = getproto(obj_at(L, 1)); luaL_argcheck(L, p->abslineinfo != NULL, 1, "function has no debug info"); lua_createtable(L, 2 * p->sizeabslineinfo, 0); for (i=0; i < p->sizeabslineinfo; i++) { lua_pushinteger(L, p->abslineinfo[i].pc); lua_rawseti(L, -2, 2 * i + 1); lua_pushinteger(L, p->abslineinfo[i].line); lua_rawseti(L, -2, 2 * i + 2); } return 1; } static int listlocals (lua_State *L) { Proto *p; int pc = cast_int(luaL_checkinteger(L, 2)) - 1; int i = 0; const char *name; luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1, "Lua function expected"); p = getproto(obj_at(L, 1)); while ((name = luaF_getlocalname(p, ++i, pc)) != NULL) lua_pushstring(L, name); return i-1; } /* }====================================================== */ static void printstack (lua_State *L) { int i; int n = lua_gettop(L); printf("stack: >>\n"); for (i = 1; i <= n; i++) { printf("%3d: %s\n", i, luaL_tolstring(L, i, NULL)); lua_pop(L, 1); } printf("<<\n"); } static int get_limits (lua_State *L) { lua_createtable(L, 0, 6); setnameval(L, "IS32INT", LUAI_IS32INT); setnameval(L, "MAXARG_Ax", MAXARG_Ax); setnameval(L, "MAXARG_Bx", MAXARG_Bx); setnameval(L, "OFFSET_sBx", OFFSET_sBx); setnameval(L, "LFPF", LFIELDS_PER_FLUSH); setnameval(L, "NUM_OPCODES", NUM_OPCODES); return 1; } static int mem_query (lua_State *L) { if (lua_isnone(L, 1)) { lua_pushinteger(L, l_memcontrol.total); lua_pushinteger(L, l_memcontrol.numblocks); lua_pushinteger(L, l_memcontrol.maxmem); return 3; } else if (lua_isnumber(L, 1)) { unsigned long limit = cast(unsigned long, luaL_checkinteger(L, 1)); if (limit == 0) limit = ULONG_MAX; l_memcontrol.memlimit = limit; return 0; } else { const char *t = luaL_checkstring(L, 1); int i; for (i = LUA_NUMTAGS - 1; i >= 0; i--) { if (strcmp(t, ttypename(i)) == 0) { lua_pushinteger(L, l_memcontrol.objcount[i]); return 1; } } return luaL_error(L, "unknown type '%s'", t); } } static int alloc_count (lua_State *L) { if (lua_isnone(L, 1)) l_memcontrol.countlimit = ~0L; else l_memcontrol.countlimit = luaL_checkinteger(L, 1); return 0; } static int alloc_failnext (lua_State *L) { UNUSED(L); l_memcontrol.failnext = 1; return 0; } static int settrick (lua_State *L) { if (ttisnil(obj_at(L, 1))) l_Trick = NULL; else l_Trick = gcvalue(obj_at(L, 1)); return 0; } static int gc_color (lua_State *L) { TValue *o; luaL_checkany(L, 1); o = obj_at(L, 1); if (!iscollectable(o)) lua_pushstring(L, "no collectable"); else { GCObject *obj = gcvalue(o); lua_pushstring(L, isdead(G(L), obj) ? "dead" : iswhite(obj) ? "white" : isblack(obj) ? "black" : "gray"); } return 1; } static int gc_age (lua_State *L) { TValue *o; luaL_checkany(L, 1); o = obj_at(L, 1); if (!iscollectable(o)) lua_pushstring(L, "no collectable"); else { static const char *gennames[] = {"new", "survival", "old0", "old1", "old", "touched1", "touched2"}; GCObject *obj = gcvalue(o); lua_pushstring(L, gennames[getage(obj)]); } return 1; } static int gc_printobj (lua_State *L) { TValue *o; luaL_checkany(L, 1); o = obj_at(L, 1); if (!iscollectable(o)) printf("no collectable\n"); else { GCObject *obj = gcvalue(o); printobj(G(L), obj); printf("\n"); } return 0; } static int gc_state (lua_State *L) { static const char *statenames[] = { "propagate", "atomic", "enteratomic", "sweepallgc", "sweepfinobj", "sweeptobefnz", "sweepend", "callfin", "pause", ""}; static const int states[] = { GCSpropagate, GCSenteratomic, GCSatomic, GCSswpallgc, GCSswpfinobj, GCSswptobefnz, GCSswpend, GCScallfin, GCSpause, -1}; int option = states[luaL_checkoption(L, 1, "", statenames)]; if (option == -1) { lua_pushstring(L, statenames[G(L)->gcstate]); return 1; } else { global_State *g = G(L); if (G(L)->gckind == KGC_GEN) luaL_error(L, "cannot change states in generational mode"); lua_lock(L); if (option < g->gcstate) { /* must cross 'pause'? */ luaC_runtilstate(L, bitmask(GCSpause)); /* run until pause */ } luaC_runtilstate(L, bitmask(option)); lua_assert(G(L)->gcstate == option); lua_unlock(L); return 0; } } static int hash_query (lua_State *L) { if (lua_isnone(L, 2)) { luaL_argcheck(L, lua_type(L, 1) == LUA_TSTRING, 1, "string expected"); lua_pushinteger(L, tsvalue(obj_at(L, 1))->hash); } else { TValue *o = obj_at(L, 1); Table *t; luaL_checktype(L, 2, LUA_TTABLE); t = hvalue(obj_at(L, 2)); lua_pushinteger(L, luaH_mainposition(t, o) - t->node); } return 1; } static int stacklevel (lua_State *L) { unsigned long a = 0; lua_pushinteger(L, (L->top.p - L->stack.p)); lua_pushinteger(L, stacksize(L)); lua_pushinteger(L, L->nCcalls); lua_pushinteger(L, L->nci); lua_pushinteger(L, (unsigned long)&a); return 5; } static int table_query (lua_State *L) { const Table *t; int i = cast_int(luaL_optinteger(L, 2, -1)); unsigned int asize; luaL_checktype(L, 1, LUA_TTABLE); t = hvalue(obj_at(L, 1)); asize = luaH_realasize(t); if (i == -1) { lua_pushinteger(L, asize); lua_pushinteger(L, allocsizenode(t)); lua_pushinteger(L, isdummy(t) ? 0 : t->lastfree - t->node); lua_pushinteger(L, t->alimit); return 4; } else if ((unsigned int)i < asize) { lua_pushinteger(L, i); pushobject(L, &t->array[i]); lua_pushnil(L); } else if ((i -= asize) < sizenode(t)) { TValue k; getnodekey(L, &k, gnode(t, i)); if (!isempty(gval(gnode(t, i))) || ttisnil(&k) || ttisnumber(&k)) { pushobject(L, &k); } else lua_pushliteral(L, ""); pushobject(L, gval(gnode(t, i))); if (gnext(&t->node[i]) != 0) lua_pushinteger(L, gnext(&t->node[i])); else lua_pushnil(L); } return 3; } static int string_query (lua_State *L) { stringtable *tb = &G(L)->strt; int s = cast_int(luaL_optinteger(L, 1, 0)) - 1; if (s == -1) { lua_pushinteger(L ,tb->size); lua_pushinteger(L ,tb->nuse); return 2; } else if (s < tb->size) { TString *ts; int n = 0; for (ts = tb->hash[s]; ts != NULL; ts = ts->u.hnext) { setsvalue2s(L, L->top.p, ts); api_incr_top(L); n++; } return n; } else return 0; } static int tref (lua_State *L) { int level = lua_gettop(L); luaL_checkany(L, 1); lua_pushvalue(L, 1); lua_pushinteger(L, luaL_ref(L, LUA_REGISTRYINDEX)); cast_void(level); /* to avoid warnings */ lua_assert(lua_gettop(L) == level+1); /* +1 for result */ return 1; } static int getref (lua_State *L) { int level = lua_gettop(L); lua_rawgeti(L, LUA_REGISTRYINDEX, luaL_checkinteger(L, 1)); cast_void(level); /* to avoid warnings */ lua_assert(lua_gettop(L) == level+1); return 1; } static int unref (lua_State *L) { int level = lua_gettop(L); luaL_unref(L, LUA_REGISTRYINDEX, cast_int(luaL_checkinteger(L, 1))); cast_void(level); /* to avoid warnings */ lua_assert(lua_gettop(L) == level); return 0; } static int upvalue (lua_State *L) { int n = cast_int(luaL_checkinteger(L, 2)); luaL_checktype(L, 1, LUA_TFUNCTION); if (lua_isnone(L, 3)) { const char *name = lua_getupvalue(L, 1, n); if (name == NULL) return 0; lua_pushstring(L, name); return 2; } else { const char *name = lua_setupvalue(L, 1, n); lua_pushstring(L, name); return 1; } } static int newuserdata (lua_State *L) { size_t size = cast_sizet(luaL_optinteger(L, 1, 0)); int nuv = luaL_optinteger(L, 2, 0); char *p = cast_charp(lua_newuserdatauv(L, size, nuv)); while (size--) *p++ = '\0'; return 1; } static int pushuserdata (lua_State *L) { lua_Integer u = luaL_checkinteger(L, 1); lua_pushlightuserdata(L, cast_voidp(cast_sizet(u))); return 1; } static int udataval (lua_State *L) { lua_pushinteger(L, cast(long, lua_touserdata(L, 1))); return 1; } static int doonnewstack (lua_State *L) { lua_State *L1 = lua_newthread(L); size_t l; const char *s = luaL_checklstring(L, 1, &l); int status = luaL_loadbuffer(L1, s, l, s); if (status == LUA_OK) status = lua_pcall(L1, 0, 0, 0); lua_pushinteger(L, status); return 1; } static int s2d (lua_State *L) { lua_pushnumber(L, cast_num(*cast(const double *, luaL_checkstring(L, 1)))); return 1; } static int d2s (lua_State *L) { double d = cast(double, luaL_checknumber(L, 1)); lua_pushlstring(L, cast_charp(&d), sizeof(d)); return 1; } static int num2int (lua_State *L) { lua_pushinteger(L, lua_tointeger(L, 1)); return 1; } static int newstate (lua_State *L) { void *ud; lua_Alloc f = lua_getallocf(L, &ud); lua_State *L1 = lua_newstate(f, ud); if (L1) { lua_atpanic(L1, tpanic); lua_pushlightuserdata(L, L1); } else lua_pushnil(L); return 1; } static lua_State *getstate (lua_State *L) { lua_State *L1 = cast(lua_State *, lua_touserdata(L, 1)); luaL_argcheck(L, L1 != NULL, 1, "state expected"); return L1; } static int loadlib (lua_State *L) { static const luaL_Reg libs[] = { {LUA_GNAME, luaopen_base}, {"coroutine", luaopen_coroutine}, {"debug", luaopen_debug}, {"io", luaopen_io}, {"os", luaopen_os}, {"math", luaopen_math}, {"string", luaopen_string}, {"table", luaopen_table}, {"T", luaB_opentests}, {NULL, NULL} }; lua_State *L1 = getstate(L); int i; luaL_requiref(L1, "package", luaopen_package, 0); lua_assert(lua_type(L1, -1) == LUA_TTABLE); /* 'requiref' should not reload module already loaded... */ luaL_requiref(L1, "package", NULL, 1); /* seg. fault if it reloads */ /* ...but should return the same module */ lua_assert(lua_compare(L1, -1, -2, LUA_OPEQ)); luaL_getsubtable(L1, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE); for (i = 0; libs[i].name; i++) { lua_pushcfunction(L1, libs[i].func); lua_setfield(L1, -2, libs[i].name); } return 0; } static int closestate (lua_State *L) { lua_State *L1 = getstate(L); lua_close(L1); return 0; } static int doremote (lua_State *L) { lua_State *L1 = getstate(L); size_t lcode; const char *code = luaL_checklstring(L, 2, &lcode); int status; lua_settop(L1, 0); status = luaL_loadbuffer(L1, code, lcode, code); if (status == LUA_OK) status = lua_pcall(L1, 0, LUA_MULTRET, 0); if (status != LUA_OK) { lua_pushnil(L); lua_pushstring(L, lua_tostring(L1, -1)); lua_pushinteger(L, status); return 3; } else { int i = 0; while (!lua_isnone(L1, ++i)) lua_pushstring(L, lua_tostring(L1, i)); lua_pop(L1, i-1); return i-1; } } static int log2_aux (lua_State *L) { unsigned int x = (unsigned int)luaL_checkinteger(L, 1); lua_pushinteger(L, luaO_ceillog2(x)); return 1; } struct Aux { jmp_buf jb; const char *paniccode; lua_State *L; }; /* ** does a long-jump back to "main program". */ static int panicback (lua_State *L) { struct Aux *b; lua_checkstack(L, 1); /* open space for 'Aux' struct */ lua_getfield(L, LUA_REGISTRYINDEX, "_jmpbuf"); /* get 'Aux' struct */ b = (struct Aux *)lua_touserdata(L, -1); lua_pop(L, 1); /* remove 'Aux' struct */ runC(b->L, L, b->paniccode); /* run optional panic code */ longjmp(b->jb, 1); return 1; /* to avoid warnings */ } static int checkpanic (lua_State *L) { struct Aux b; void *ud; lua_State *L1; const char *code = luaL_checkstring(L, 1); lua_Alloc f = lua_getallocf(L, &ud); b.paniccode = luaL_optstring(L, 2, ""); b.L = L; L1 = lua_newstate(f, ud); /* create new state */ if (L1 == NULL) { /* error? */ lua_pushnil(L); return 1; } lua_atpanic(L1, panicback); /* set its panic function */ lua_pushlightuserdata(L1, &b); lua_setfield(L1, LUA_REGISTRYINDEX, "_jmpbuf"); /* store 'Aux' struct */ if (setjmp(b.jb) == 0) { /* set jump buffer */ runC(L, L1, code); /* run code unprotected */ lua_pushliteral(L, "no errors"); } else { /* error handling */ /* move error message to original state */ lua_pushstring(L, lua_tostring(L1, -1)); } lua_close(L1); return 1; } /* ** {==================================================================== ** function to test the API with C. It interprets a kind of assembler ** language with calls to the API, so the test can be driven by Lua code ** ===================================================================== */ static void sethookaux (lua_State *L, int mask, int count, const char *code); static const char *const delimits = " \t\n,;"; static void skip (const char **pc) { for (;;) { if (**pc != '\0' && strchr(delimits, **pc)) (*pc)++; else if (**pc == '#') { /* comment? */ while (**pc != '\n' && **pc != '\0') (*pc)++; /* until end-of-line */ } else break; } } static int getnum_aux (lua_State *L, lua_State *L1, const char **pc) { int res = 0; int sig = 1; skip(pc); if (**pc == '.') { res = cast_int(lua_tointeger(L1, -1)); lua_pop(L1, 1); (*pc)++; return res; } else if (**pc == '*') { res = lua_gettop(L1); (*pc)++; return res; } else if (**pc == '-') { sig = -1; (*pc)++; } if (!lisdigit(cast_uchar(**pc))) luaL_error(L, "number expected (%s)", *pc); while (lisdigit(cast_uchar(**pc))) res = res*10 + (*(*pc)++) - '0'; return sig*res; } static const char *getstring_aux (lua_State *L, char *buff, const char **pc) { int i = 0; skip(pc); if (**pc == '"' || **pc == '\'') { /* quoted string? */ int quote = *(*pc)++; while (**pc != quote) { if (**pc == '\0') luaL_error(L, "unfinished string in C script"); buff[i++] = *(*pc)++; } (*pc)++; } else { while (**pc != '\0' && !strchr(delimits, **pc)) buff[i++] = *(*pc)++; } buff[i] = '\0'; return buff; } static int getindex_aux (lua_State *L, lua_State *L1, const char **pc) { skip(pc); switch (*(*pc)++) { case 'R': return LUA_REGISTRYINDEX; case 'G': return luaL_error(L, "deprecated index 'G'"); case 'U': return lua_upvalueindex(getnum_aux(L, L1, pc)); default: (*pc)--; return getnum_aux(L, L1, pc); } } static const char *const statcodes[] = {"OK", "YIELD", "ERRRUN", "ERRSYNTAX", MEMERRMSG, "ERRGCMM", "ERRERR"}; /* ** Avoid these stat codes from being collected, to avoid possible ** memory error when pushing them. */ static void regcodes (lua_State *L) { unsigned int i; for (i = 0; i < sizeof(statcodes) / sizeof(statcodes[0]); i++) { lua_pushboolean(L, 1); lua_setfield(L, LUA_REGISTRYINDEX, statcodes[i]); } } #define EQ(s1) (strcmp(s1, inst) == 0) #define getnum (getnum_aux(L, L1, &pc)) #define getstring (getstring_aux(L, buff, &pc)) #define getindex (getindex_aux(L, L1, &pc)) static int testC (lua_State *L); static int Cfunck (lua_State *L, int status, lua_KContext ctx); /* ** arithmetic operation encoding for 'arith' instruction ** LUA_OPIDIV -> \ ** LUA_OPSHL -> < ** LUA_OPSHR -> > ** LUA_OPUNM -> _ ** LUA_OPBNOT -> ! */ static const char ops[] = "+-*%^/\\&|~<>_!"; static int runC (lua_State *L, lua_State *L1, const char *pc) { char buff[300]; int status = 0; if (pc == NULL) return luaL_error(L, "attempt to runC null script"); for (;;) { const char *inst = getstring; if EQ("") return 0; else if EQ("absindex") { lua_pushnumber(L1, lua_absindex(L1, getindex)); } else if EQ("append") { int t = getindex; int i = lua_rawlen(L1, t); lua_rawseti(L1, t, i + 1); } else if EQ("arith") { int op; skip(&pc); op = strchr(ops, *pc++) - ops; lua_arith(L1, op); } else if EQ("call") { int narg = getnum; int nres = getnum; lua_call(L1, narg, nres); } else if EQ("callk") { int narg = getnum; int nres = getnum; int i = getindex; lua_callk(L1, narg, nres, i, Cfunck); } else if EQ("checkstack") { int sz = getnum; const char *msg = getstring; if (*msg == '\0') msg = NULL; /* to test 'luaL_checkstack' with no message */ luaL_checkstack(L1, sz, msg); } else if EQ("rawcheckstack") { int sz = getnum; lua_pushboolean(L1, lua_checkstack(L1, sz)); } else if EQ("compare") { const char *opt = getstring; /* EQ, LT, or LE */ int op = (opt[0] == 'E') ? LUA_OPEQ : (opt[1] == 'T') ? LUA_OPLT : LUA_OPLE; int a = getindex; int b = getindex; lua_pushboolean(L1, lua_compare(L1, a, b, op)); } else if EQ("concat") { lua_concat(L1, getnum); } else if EQ("copy") { int f = getindex; lua_copy(L1, f, getindex); } else if EQ("func2num") { lua_CFunction func = lua_tocfunction(L1, getindex); lua_pushnumber(L1, cast_sizet(func)); } else if EQ("getfield") { int t = getindex; lua_getfield(L1, t, getstring); } else if EQ("getglobal") { lua_getglobal(L1, getstring); } else if EQ("getmetatable") { if (lua_getmetatable(L1, getindex) == 0) lua_pushnil(L1); } else if EQ("gettable") { lua_gettable(L1, getindex); } else if EQ("gettop") { lua_pushinteger(L1, lua_gettop(L1)); } else if EQ("gsub") { int a = getnum; int b = getnum; int c = getnum; luaL_gsub(L1, lua_tostring(L1, a), lua_tostring(L1, b), lua_tostring(L1, c)); } else if EQ("insert") { lua_insert(L1, getnum); } else if EQ("iscfunction") { lua_pushboolean(L1, lua_iscfunction(L1, getindex)); } else if EQ("isfunction") { lua_pushboolean(L1, lua_isfunction(L1, getindex)); } else if EQ("isnil") { lua_pushboolean(L1, lua_isnil(L1, getindex)); } else if EQ("isnull") { lua_pushboolean(L1, lua_isnone(L1, getindex)); } else if EQ("isnumber") { lua_pushboolean(L1, lua_isnumber(L1, getindex)); } else if EQ("isstring") { lua_pushboolean(L1, lua_isstring(L1, getindex)); } else if EQ("istable") { lua_pushboolean(L1, lua_istable(L1, getindex)); } else if EQ("isudataval") { lua_pushboolean(L1, lua_islightuserdata(L1, getindex)); } else if EQ("isuserdata") { lua_pushboolean(L1, lua_isuserdata(L1, getindex)); } else if EQ("len") { lua_len(L1, getindex); } else if EQ("Llen") { lua_pushinteger(L1, luaL_len(L1, getindex)); } else if EQ("loadfile") { luaL_loadfile(L1, luaL_checkstring(L1, getnum)); } else if EQ("loadstring") { const char *s = luaL_checkstring(L1, getnum); luaL_loadstring(L1, s); } else if EQ("newmetatable") { lua_pushboolean(L1, luaL_newmetatable(L1, getstring)); } else if EQ("newtable") { lua_newtable(L1); } else if EQ("newthread") { lua_newthread(L1); } else if EQ("resetthread") { lua_pushinteger(L1, lua_resetthread(L1)); /* deprecated */ } else if EQ("newuserdata") { lua_newuserdata(L1, getnum); } else if EQ("next") { lua_next(L1, -2); } else if EQ("objsize") { lua_pushinteger(L1, lua_rawlen(L1, getindex)); } else if EQ("pcall") { int narg = getnum; int nres = getnum; status = lua_pcall(L1, narg, nres, getnum); } else if EQ("pcallk") { int narg = getnum; int nres = getnum; int i = getindex; status = lua_pcallk(L1, narg, nres, 0, i, Cfunck); } else if EQ("pop") { lua_pop(L1, getnum); } else if EQ("printstack") { int n = getnum; if (n != 0) { printf("%s\n", luaL_tolstring(L1, n, NULL)); lua_pop(L1, 1); } else printstack(L1); } else if EQ("print") { const char *msg = getstring; printf("%s\n", msg); } else if EQ("warningC") { const char *msg = getstring; lua_warning(L1, msg, 1); } else if EQ("warning") { const char *msg = getstring; lua_warning(L1, msg, 0); } else if EQ("pushbool") { lua_pushboolean(L1, getnum); } else if EQ("pushcclosure") { lua_pushcclosure(L1, testC, getnum); } else if EQ("pushint") { lua_pushinteger(L1, getnum); } else if EQ("pushnil") { lua_pushnil(L1); } else if EQ("pushnum") { lua_pushnumber(L1, (lua_Number)getnum); } else if EQ("pushstatus") { lua_pushstring(L1, statcodes[status]); } else if EQ("pushstring") { lua_pushstring(L1, getstring); } else if EQ("pushupvalueindex") { lua_pushinteger(L1, lua_upvalueindex(getnum)); } else if EQ("pushvalue") { lua_pushvalue(L1, getindex); } else if EQ("pushfstringI") { lua_pushfstring(L1, lua_tostring(L, -2), (int)lua_tointeger(L, -1)); } else if EQ("pushfstringS") { lua_pushfstring(L1, lua_tostring(L, -2), lua_tostring(L, -1)); } else if EQ("pushfstringP") { lua_pushfstring(L1, lua_tostring(L, -2), lua_topointer(L, -1)); } else if EQ("rawget") { int t = getindex; lua_rawget(L1, t); } else if EQ("rawgeti") { int t = getindex; lua_rawgeti(L1, t, getnum); } else if EQ("rawgetp") { int t = getindex; lua_rawgetp(L1, t, cast_voidp(cast_sizet(getnum))); } else if EQ("rawset") { int t = getindex; lua_rawset(L1, t); } else if EQ("rawseti") { int t = getindex; lua_rawseti(L1, t, getnum); } else if EQ("rawsetp") { int t = getindex; lua_rawsetp(L1, t, cast_voidp(cast_sizet(getnum))); } else if EQ("remove") { lua_remove(L1, getnum); } else if EQ("replace") { lua_replace(L1, getindex); } else if EQ("resume") { int i = getindex; int nres; status = lua_resume(lua_tothread(L1, i), L, getnum, &nres); } else if EQ("return") { int n = getnum; if (L1 != L) { int i; for (i = 0; i < n; i++) { int idx = -(n - i); switch (lua_type(L1, idx)) { case LUA_TBOOLEAN: lua_pushboolean(L, lua_toboolean(L1, idx)); break; default: lua_pushstring(L, lua_tostring(L1, idx)); break; } } } return n; } else if EQ("rotate") { int i = getindex; lua_rotate(L1, i, getnum); } else if EQ("setfield") { int t = getindex; const char *s = getstring; lua_setfield(L1, t, s); } else if EQ("seti") { int t = getindex; lua_seti(L1, t, getnum); } else if EQ("setglobal") { const char *s = getstring; lua_setglobal(L1, s); } else if EQ("sethook") { int mask = getnum; int count = getnum; const char *s = getstring; sethookaux(L1, mask, count, s); } else if EQ("setmetatable") { int idx = getindex; lua_setmetatable(L1, idx); } else if EQ("settable") { lua_settable(L1, getindex); } else if EQ("settop") { lua_settop(L1, getnum); } else if EQ("testudata") { int i = getindex; lua_pushboolean(L1, luaL_testudata(L1, i, getstring) != NULL); } else if EQ("error") { lua_error(L1); } else if EQ("abort") { abort(); } else if EQ("throw") { #if defined(__cplusplus) static struct X { int x; } x; throw x; #else luaL_error(L1, "C++"); #endif break; } else if EQ("tobool") { lua_pushboolean(L1, lua_toboolean(L1, getindex)); } else if EQ("tocfunction") { lua_pushcfunction(L1, lua_tocfunction(L1, getindex)); } else if EQ("tointeger") { lua_pushinteger(L1, lua_tointeger(L1, getindex)); } else if EQ("tonumber") { lua_pushnumber(L1, lua_tonumber(L1, getindex)); } else if EQ("topointer") { lua_pushlightuserdata(L1, cast_voidp(lua_topointer(L1, getindex))); } else if EQ("touserdata") { lua_pushlightuserdata(L1, lua_touserdata(L1, getindex)); } else if EQ("tostring") { const char *s = lua_tostring(L1, getindex); const char *s1 = lua_pushstring(L1, s); cast_void(s1); /* to avoid warnings */ lua_longassert((s == NULL && s1 == NULL) || strcmp(s, s1) == 0); } else if EQ("Ltolstring") { luaL_tolstring(L1, getindex, NULL); } else if EQ("type") { lua_pushstring(L1, luaL_typename(L1, getnum)); } else if EQ("xmove") { int f = getindex; int t = getindex; lua_State *fs = (f == 0) ? L1 : lua_tothread(L1, f); lua_State *ts = (t == 0) ? L1 : lua_tothread(L1, t); int n = getnum; if (n == 0) n = lua_gettop(fs); lua_xmove(fs, ts, n); } else if EQ("isyieldable") { lua_pushboolean(L1, lua_isyieldable(lua_tothread(L1, getindex))); } else if EQ("yield") { return lua_yield(L1, getnum); } else if EQ("yieldk") { int nres = getnum; int i = getindex; return lua_yieldk(L1, nres, i, Cfunck); } else if EQ("toclose") { lua_toclose(L1, getnum); } else if EQ("closeslot") { lua_closeslot(L1, getnum); } else luaL_error(L, "unknown instruction %s", buff); } return 0; } static int testC (lua_State *L) { lua_State *L1; const char *pc; if (lua_isuserdata(L, 1)) { L1 = getstate(L); pc = luaL_checkstring(L, 2); } else if (lua_isthread(L, 1)) { L1 = lua_tothread(L, 1); pc = luaL_checkstring(L, 2); } else { L1 = L; pc = luaL_checkstring(L, 1); } return runC(L, L1, pc); } static int Cfunc (lua_State *L) { return runC(L, L, lua_tostring(L, lua_upvalueindex(1))); } static int Cfunck (lua_State *L, int status, lua_KContext ctx) { lua_pushstring(L, statcodes[status]); lua_setglobal(L, "status"); lua_pushinteger(L, ctx); lua_setglobal(L, "ctx"); return runC(L, L, lua_tostring(L, ctx)); } static int makeCfunc (lua_State *L) { luaL_checkstring(L, 1); lua_pushcclosure(L, Cfunc, lua_gettop(L)); return 1; } /* }====================================================== */ /* ** {====================================================== ** tests for C hooks ** ======================================================= */ /* ** C hook that runs the C script stored in registry.C_HOOK[L] */ static void Chook (lua_State *L, lua_Debug *ar) { const char *scpt; const char *const events [] = {"call", "ret", "line", "count", "tailcall"}; lua_getfield(L, LUA_REGISTRYINDEX, "C_HOOK"); lua_pushlightuserdata(L, L); lua_gettable(L, -2); /* get C_HOOK[L] (script saved by sethookaux) */ scpt = lua_tostring(L, -1); /* not very religious (string will be popped) */ lua_pop(L, 2); /* remove C_HOOK and script */ lua_pushstring(L, events[ar->event]); /* may be used by script */ lua_pushinteger(L, ar->currentline); /* may be used by script */ runC(L, L, scpt); /* run script from C_HOOK[L] */ } /* ** sets 'registry.C_HOOK[L] = scpt' and sets 'Chook' as a hook */ static void sethookaux (lua_State *L, int mask, int count, const char *scpt) { if (*scpt == '\0') { /* no script? */ lua_sethook(L, NULL, 0, 0); /* turn off hooks */ return; } lua_getfield(L, LUA_REGISTRYINDEX, "C_HOOK"); /* get C_HOOK table */ if (!lua_istable(L, -1)) { /* no hook table? */ lua_pop(L, 1); /* remove previous value */ lua_newtable(L); /* create new C_HOOK table */ lua_pushvalue(L, -1); lua_setfield(L, LUA_REGISTRYINDEX, "C_HOOK"); /* register it */ } lua_pushlightuserdata(L, L); lua_pushstring(L, scpt); lua_settable(L, -3); /* C_HOOK[L] = script */ lua_sethook(L, Chook, mask, count); } static int sethook (lua_State *L) { if (lua_isnoneornil(L, 1)) lua_sethook(L, NULL, 0, 0); /* turn off hooks */ else { const char *scpt = luaL_checkstring(L, 1); const char *smask = luaL_checkstring(L, 2); int count = cast_int(luaL_optinteger(L, 3, 0)); int mask = 0; if (strchr(smask, 'c')) mask |= LUA_MASKCALL; if (strchr(smask, 'r')) mask |= LUA_MASKRET; if (strchr(smask, 'l')) mask |= LUA_MASKLINE; if (count > 0) mask |= LUA_MASKCOUNT; sethookaux(L, mask, count, scpt); } return 0; } static int coresume (lua_State *L) { int status, nres; lua_State *co = lua_tothread(L, 1); luaL_argcheck(L, co, 1, "coroutine expected"); status = lua_resume(co, L, 0, &nres); if (status != LUA_OK && status != LUA_YIELD) { lua_pushboolean(L, 0); lua_insert(L, -2); return 2; /* return false + error message */ } else { lua_pushboolean(L, 1); return 1; } } /* }====================================================== */ static const struct luaL_Reg tests_funcs[] = { {"checkmemory", lua_checkmemory}, {"closestate", closestate}, {"d2s", d2s}, {"doonnewstack", doonnewstack}, {"doremote", doremote}, {"gccolor", gc_color}, {"gcage", gc_age}, {"gcstate", gc_state}, {"pobj", gc_printobj}, {"getref", getref}, {"hash", hash_query}, {"log2", log2_aux}, {"limits", get_limits}, {"listcode", listcode}, {"printcode", printcode}, {"listk", listk}, {"listabslineinfo", listabslineinfo}, {"listlocals", listlocals}, {"loadlib", loadlib}, {"checkpanic", checkpanic}, {"newstate", newstate}, {"newuserdata", newuserdata}, {"num2int", num2int}, {"pushuserdata", pushuserdata}, {"querystr", string_query}, {"querytab", table_query}, {"ref", tref}, {"resume", coresume}, {"s2d", s2d}, {"sethook", sethook}, {"stacklevel", stacklevel}, {"testC", testC}, {"makeCfunc", makeCfunc}, {"totalmem", mem_query}, {"alloccount", alloc_count}, {"allocfailnext", alloc_failnext}, {"trick", settrick}, {"udataval", udataval}, {"unref", unref}, {"upvalue", upvalue}, {NULL, NULL} }; static void checkfinalmem (void) { lua_assert(l_memcontrol.numblocks == 0); lua_assert(l_memcontrol.total == 0); } int luaB_opentests (lua_State *L) { void *ud; lua_Alloc f = lua_getallocf(L, &ud); lua_atpanic(L, &tpanic); lua_setwarnf(L, &warnf, L); lua_pushboolean(L, 0); lua_setglobal(L, "_WARN"); /* _WARN = false */ regcodes(L); atexit(checkfinalmem); lua_assert(f == debug_realloc && ud == cast_voidp(&l_memcontrol)); lua_setallocf(L, f, ud); /* exercise this function */ luaL_newlib(L, tests_funcs); return 1; } #endif