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path: root/lib/lua/src/ldebug.c
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Diffstat (limited to 'lib/lua/src/ldebug.c')
-rw-r--r--lib/lua/src/ldebug.c667
1 files changed, 0 insertions, 667 deletions
diff --git a/lib/lua/src/ldebug.c b/lib/lua/src/ldebug.c
deleted file mode 100644
index d579d94..0000000
--- a/lib/lua/src/ldebug.c
+++ /dev/null
@@ -1,667 +0,0 @@
-/*
-** Debug Interface
-** See Copyright Notice in lua.h
-*/
-
-
-#include <stdarg.h>
-#include <stddef.h>
-#include <string.h>
-
-
-#define ldebug_c
-#define LUA_CORE
-
-#include "lua.h"
-
-#include "lapi.h"
-#include "lcode.h"
-#include "ldebug.h"
-#include "ldo.h"
-#include "lfunc.h"
-#include "lobject.h"
-#include "lopcodes.h"
-#include "lstate.h"
-#include "lstring.h"
-#include "ltable.h"
-#include "ltm.h"
-#include "lvm.h"
-
-
-
-static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
-
-
-static int currentpc (lua_State *L, CallInfo *ci) {
- if (!isLua(ci)) return -1; /* function is not a Lua function? */
- if (ci == L->ci)
- ci->savedpc = L->savedpc;
- return pcRel(ci->savedpc, ci_func(ci)->l.p);
-}
-
-
-static int currentline (lua_State *L, CallInfo *ci) {
- int pc = currentpc(L, ci);
- if (pc < 0)
- return -1; /* only active lua functions have current-line information */
- else
- return getline(ci_func(ci)->l.p, pc);
-}
-
-
-/*
-** this function can be called asynchronous (e.g. during a signal)
-*/
-LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
- if (func == NULL || mask == 0) { /* turn off hooks? */
- mask = 0;
- func = NULL;
- }
- L->hook = func;
- L->basehookcount = count;
- resethookcount(L);
- L->hookmask = cast_byte(mask);
- return 1;
-}
-
-
-LUA_API lua_Hook lua_gethook (lua_State *L) {
- return L->hook;
-}
-
-
-LUA_API int lua_gethookmask (lua_State *L) {
- return L->hookmask;
-}
-
-
-LUA_API int lua_gethookcount (lua_State *L) {
- return L->basehookcount;
-}
-
-
-LUA_API lua_CallWrap lua_setcallwrap (lua_State *L, lua_CallWrap func) {
- lua_CallWrap old_func;
- lua_lock(L);
- old_func = L->callwrap;
- L->callwrap = func;
- lua_unlock(L);
- return old_func;
-}
-
-
-LUA_API lua_ThreadHook lua_setcreatehook (lua_State *L, lua_ThreadHook func) {
- lua_ThreadHook old_func;
- lua_lock(L);
- old_func = L->createhook;
- L->createhook = func;
- lua_unlock(L);
- return old_func;
-}
-
-
-LUA_API lua_ThreadHook lua_setdestroyhook (lua_State *L, lua_ThreadHook func) {
- lua_ThreadHook old_func;
- lua_lock(L);
- old_func = L->destroyhook;
- L->destroyhook = func;
- lua_unlock(L);
- return old_func;
-}
-
-
-LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
- int status;
- CallInfo *ci;
- lua_lock(L);
- for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {
- level--;
- if (f_isLua(ci)) /* Lua function? */
- level -= ci->tailcalls; /* skip lost tail calls */
- }
- if (level == 0 && ci > L->base_ci) { /* level found? */
- status = 1;
- ar->i_ci = cast_int(ci - L->base_ci);
- }
- else if (level < 0) { /* level is of a lost tail call? */
- status = 1;
- ar->i_ci = 0;
- }
- else status = 0; /* no such level */
- lua_unlock(L);
- return status;
-}
-
-
-static Proto *getluaproto (CallInfo *ci) {
- return (isLua(ci) ? ci_func(ci)->l.p : NULL);
-}
-
-
-static const char *findlocal (lua_State *L, CallInfo *ci, int n) {
- const char *name;
- Proto *fp = getluaproto(ci);
- if (fp && (name = luaF_getlocalname(fp, n, currentpc(L, ci))) != NULL)
- return name; /* is a local variable in a Lua function */
- else {
- StkId limit = (ci == L->ci) ? L->top : (ci+1)->func;
- if (limit - ci->base >= n && n > 0) /* is 'n' inside 'ci' stack? */
- return "(*temporary)";
- else
- return NULL;
- }
-}
-
-
-LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
- CallInfo *ci = L->base_ci + ar->i_ci;
- const char *name = findlocal(L, ci, n);
- lua_lock(L);
- if (name)
- luaA_pushobject(L, ci->base + (n - 1));
- lua_unlock(L);
- return name;
-}
-
-
-LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
- CallInfo *ci = L->base_ci + ar->i_ci;
- const char *name = findlocal(L, ci, n);
- lua_lock(L);
- if (name)
- setobjs2s(L, ci->base + (n - 1), L->top - 1);
- L->top--; /* pop value */
- lua_unlock(L);
- return name;
-}
-
-
-static void funcinfo (lua_Debug *ar, Closure *cl) {
- if (cl->c.isC) {
- ar->source = "=[C]";
- ar->linedefined = -1;
- ar->lastlinedefined = -1;
- ar->what = "C";
- }
- else {
- ar->source = getstr(cl->l.p->source);
- ar->linedefined = cl->l.p->linedefined;
- ar->lastlinedefined = cl->l.p->lastlinedefined;
- ar->what = (ar->linedefined == 0) ? "main" : "Lua";
- }
- luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
-}
-
-
-static void info_tailcall (lua_Debug *ar) {
- ar->name = ar->namewhat = "";
- ar->what = "tail";
- ar->lastlinedefined = ar->linedefined = ar->currentline = -1;
- ar->source = "=(tail call)";
- luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
- ar->nups = 0;
-}
-
-
-static void collectvalidlines (lua_State *L, Closure *f) {
- if (f == NULL || f->c.isC) {
- setnilvalue(L->top);
- }
- else {
- Table *t = luaH_new(L, 0, 0);
- int *lineinfo = f->l.p->lineinfo;
- int i;
- for (i=0; i<f->l.p->sizelineinfo; i++)
- setbvalue(luaH_setnum(L, t, lineinfo[i]), 1);
- sethvalue(L, L->top, t);
- }
- incr_top(L);
-}
-
-
-static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
- Closure *f, CallInfo *ci) {
- int status = 1;
- if (f == NULL) {
- info_tailcall(ar);
- return status;
- }
- for (; *what; what++) {
- switch (*what) {
- case 'S': {
- funcinfo(ar, f);
- break;
- }
- case 'l': {
- ar->currentline = (ci) ? currentline(L, ci) : -1;
- break;
- }
- case 'u': {
- ar->nups = f->c.nupvalues;
- break;
- }
- case 'n': {
- ar->namewhat = (ci) ? getfuncname(L, ci, &ar->name) : NULL;
- if (ar->namewhat == NULL) {
- ar->namewhat = ""; /* not found */
- ar->name = NULL;
- }
- break;
- }
- case 'L':
- case 'f': /* handled by lua_getinfo */
- break;
- default: status = 0; /* invalid option */
- }
- }
- return status;
-}
-
-
-LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
- int status;
- Closure *f = NULL;
- CallInfo *ci = NULL;
- lua_lock(L);
- if (*what == '>') {
- StkId func = L->top - 1;
- luai_apicheck(L, ttisfunction(func));
- what++; /* skip the '>' */
- f = clvalue(func);
- L->top--; /* pop function */
- }
- else if (ar->i_ci != 0) { /* no tail call? */
- ci = L->base_ci + ar->i_ci;
- lua_assert(ttisfunction(ci->func));
- f = clvalue(ci->func);
- }
- status = auxgetinfo(L, what, ar, f, ci);
- if (strchr(what, 'f')) {
- if (f == NULL) setnilvalue(L->top);
- else setclvalue(L, L->top, f);
- incr_top(L);
- }
- if (strchr(what, 'L'))
- collectvalidlines(L, f);
- lua_unlock(L);
- return status;
-}
-
-
-/*
-** {======================================================
-** Symbolic Execution and code checker
-** =======================================================
-*/
-
-#define check(x) if (!(x)) return 0;
-
-#define checkjump(pt,pc) check(0 <= pc && pc < pt->sizecode)
-
-#define checkreg(pt,reg) check((reg) < (pt)->maxstacksize)
-
-
-
-static int precheck (const Proto *pt) {
- check(pt->maxstacksize <= MAXSTACK);
- check(pt->numparams+(pt->is_vararg & VARARG_HASARG) <= pt->maxstacksize);
- check(!(pt->is_vararg & VARARG_NEEDSARG) ||
- (pt->is_vararg & VARARG_HASARG));
- check(pt->sizeupvalues <= pt->nups);
- check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);
- check(pt->sizecode > 0 && GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);
- return 1;
-}
-
-
-#define checkopenop(pt,pc) luaG_checkopenop((pt)->code[(pc)+1])
-
-int luaG_checkopenop (Instruction i) {
- switch (GET_OPCODE(i)) {
- case OP_CALL:
- case OP_TAILCALL:
- case OP_RETURN:
- case OP_SETLIST: {
- check(GETARG_B(i) == 0);
- return 1;
- }
- default: return 0; /* invalid instruction after an open call */
- }
-}
-
-
-static int checkArgMode (const Proto *pt, int r, enum OpArgMask mode) {
- switch (mode) {
- case OpArgN: check(r == 0); break;
- case OpArgU: break;
- case OpArgR: checkreg(pt, r); break;
- case OpArgK:
- check(ISK(r) ? INDEXK(r) < pt->sizek : r < pt->maxstacksize);
- break;
- }
- return 1;
-}
-
-
-static Instruction symbexec (const Proto *pt, int lastpc, int reg) {
- int pc;
- int last; /* stores position of last instruction that changed `reg' */
- last = pt->sizecode-1; /* points to final return (a `neutral' instruction) */
- check(precheck(pt));
- for (pc = 0; pc < lastpc; pc++) {
- Instruction i = pt->code[pc];
- OpCode op = GET_OPCODE(i);
- int a = GETARG_A(i);
- int b = 0;
- int c = 0;
- check(op < NUM_OPCODES);
- checkreg(pt, a);
- switch (getOpMode(op)) {
- case iABC: {
- b = GETARG_B(i);
- c = GETARG_C(i);
- check(checkArgMode(pt, b, getBMode(op)));
- check(checkArgMode(pt, c, getCMode(op)));
- break;
- }
- case iABx: {
- b = GETARG_Bx(i);
- if (getBMode(op) == OpArgK) check(b < pt->sizek);
- break;
- }
- case iAsBx: {
- b = GETARG_sBx(i);
- if (getBMode(op) == OpArgR) {
- int dest = pc+1+b;
- check(0 <= dest && dest < pt->sizecode);
- if (dest > 0) {
- int j;
- /* check that it does not jump to a setlist count; this
- is tricky, because the count from a previous setlist may
- have the same value of an invalid setlist; so, we must
- go all the way back to the first of them (if any) */
- for (j = 0; j < dest; j++) {
- Instruction d = pt->code[dest-1-j];
- if (!(GET_OPCODE(d) == OP_SETLIST && GETARG_C(d) == 0)) break;
- }
- /* if 'j' is even, previous value is not a setlist (even if
- it looks like one) */
- check((j&1) == 0);
- }
- }
- break;
- }
- }
- if (testAMode(op)) {
- if (a == reg) last = pc; /* change register `a' */
- }
- if (testTMode(op)) {
- check(pc+2 < pt->sizecode); /* check skip */
- check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);
- }
- switch (op) {
- case OP_LOADBOOL: {
- if (c == 1) { /* does it jump? */
- check(pc+2 < pt->sizecode); /* check its jump */
- check(GET_OPCODE(pt->code[pc+1]) != OP_SETLIST ||
- GETARG_C(pt->code[pc+1]) != 0);
- }
- break;
- }
- case OP_LOADNIL: {
- if (a <= reg && reg <= b)
- last = pc; /* set registers from `a' to `b' */
- break;
- }
- case OP_GETUPVAL:
- case OP_SETUPVAL: {
- check(b < pt->nups);
- break;
- }
- case OP_GETGLOBAL:
- case OP_SETGLOBAL: {
- check(ttisstring(&pt->k[b]));
- break;
- }
- case OP_SELF: {
- checkreg(pt, a+1);
- if (reg == a+1) last = pc;
- break;
- }
- case OP_CONCAT: {
- check(b < c); /* at least two operands */
- break;
- }
- case OP_TFORLOOP: {
- check(c >= 1); /* at least one result (control variable) */
- checkreg(pt, a+2+c); /* space for results */
- if (reg >= a+2) last = pc; /* affect all regs above its base */
- break;
- }
- case OP_FORLOOP:
- case OP_FORPREP:
- checkreg(pt, a+3);
- /* go through */
- case OP_JMP: {
- int dest = pc+1+b;
- /* not full check and jump is forward and do not skip `lastpc'? */
- if (reg != NO_REG && pc < dest && dest <= lastpc)
- pc += b; /* do the jump */
- break;
- }
- case OP_CALL:
- case OP_TAILCALL: {
- if (b != 0) {
- checkreg(pt, a+b-1);
- }
- c--; /* c = num. returns */
- if (c == LUA_MULTRET) {
- check(checkopenop(pt, pc));
- }
- else if (c != 0)
- checkreg(pt, a+c-1);
- if (reg >= a) last = pc; /* affect all registers above base */
- break;
- }
- case OP_RETURN: {
- b--; /* b = num. returns */
- if (b > 0) checkreg(pt, a+b-1);
- break;
- }
- case OP_SETLIST: {
- if (b > 0) checkreg(pt, a + b);
- if (c == 0) {
- pc++;
- check(pc < pt->sizecode - 1);
- }
- break;
- }
- case OP_CLOSURE: {
- int nup, j;
- check(b < pt->sizep);
- nup = pt->p[b]->nups;
- check(pc + nup < pt->sizecode);
- for (j = 1; j <= nup; j++) {
- OpCode op1 = GET_OPCODE(pt->code[pc + j]);
- check(op1 == OP_GETUPVAL || op1 == OP_MOVE);
- }
- if (reg != NO_REG) /* tracing? */
- pc += nup; /* do not 'execute' these pseudo-instructions */
- break;
- }
- case OP_VARARG: {
- check((pt->is_vararg & VARARG_ISVARARG) &&
- !(pt->is_vararg & VARARG_NEEDSARG));
- b--;
- if (b == LUA_MULTRET) check(checkopenop(pt, pc));
- checkreg(pt, a+b-1);
- break;
- }
- default: break;
- }
- }
- return pt->code[last];
-}
-
-#undef check
-#undef checkjump
-#undef checkreg
-
-/* }====================================================== */
-
-
-int luaG_checkcode (const Proto *pt) {
- return (symbexec(pt, pt->sizecode, NO_REG) != 0);
-}
-
-
-static const char *kname (Proto *p, int c) {
- if (ISK(c) && ttisstring(&p->k[INDEXK(c)]))
- return svalue(&p->k[INDEXK(c)]);
- else
- return "?";
-}
-
-
-static const char *getobjname (lua_State *L, CallInfo *ci, int stackpos,
- const char **name) {
- if (isLua(ci)) { /* a Lua function? */
- Proto *p = ci_func(ci)->l.p;
- int pc = currentpc(L, ci);
- Instruction i;
- *name = luaF_getlocalname(p, stackpos+1, pc);
- if (*name) /* is a local? */
- return "local";
- i = symbexec(p, pc, stackpos); /* try symbolic execution */
- lua_assert(pc != -1);
- switch (GET_OPCODE(i)) {
- case OP_GETGLOBAL: {
- int g = GETARG_Bx(i); /* global index */
- lua_assert(ttisstring(&p->k[g]));
- *name = svalue(&p->k[g]);
- return "global";
- }
- case OP_MOVE: {
- int a = GETARG_A(i);
- int b = GETARG_B(i); /* move from `b' to `a' */
- if (b < a)
- return getobjname(L, ci, b, name); /* get name for `b' */
- break;
- }
- case OP_GETTABLE: {
- int k = GETARG_C(i); /* key index */
- *name = kname(p, k);
- return "field";
- }
- case OP_GETUPVAL: {
- int u = GETARG_B(i); /* upvalue index */
- *name = p->upvalues ? getstr(p->upvalues[u]) : "?";
- return "upvalue";
- }
- case OP_SELF: {
- int k = GETARG_C(i); /* key index */
- *name = kname(p, k);
- return "method";
- }
- default: break;
- }
- }
- return NULL; /* no useful name found */
-}
-
-
-static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
- Instruction i;
- if ((isLua(ci) && ci->tailcalls > 0) || !isLua(ci - 1))
- return NULL; /* calling function is not Lua (or is unknown) */
- ci--; /* calling function */
- i = ci_func(ci)->l.p->code[currentpc(L, ci)];
- if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL ||
- GET_OPCODE(i) == OP_TFORLOOP)
- return getobjname(L, ci, GETARG_A(i), name);
- else
- return NULL; /* no useful name can be found */
-}
-
-
-/* only ANSI way to check whether a pointer points to an array */
-static int isinstack (CallInfo *ci, const TValue *o) {
- StkId p;
- for (p = ci->base; p < ci->top; p++)
- if (o == p) return 1;
- return 0;
-}
-
-
-void luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
- const char *name = NULL;
- const char *t = luaT_typenames[ttype(o)];
- const char *kind = (isinstack(L->ci, o)) ?
- getobjname(L, L->ci, cast_int(o - L->base), &name) :
- NULL;
- if (kind)
- luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
- op, kind, name, t);
- else
- luaG_runerror(L, "attempt to %s a %s value", op, t);
-}
-
-
-void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
- if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
- lua_assert(!ttisstring(p1) && !ttisnumber(p1));
- luaG_typeerror(L, p1, "concatenate");
-}
-
-
-void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
- TValue temp;
- if (luaV_tonumber(p1, &temp) == NULL)
- p2 = p1; /* first operand is wrong */
- luaG_typeerror(L, p2, "perform arithmetic on");
-}
-
-
-int luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
- const char *t1 = luaT_typenames[ttype(p1)];
- const char *t2 = luaT_typenames[ttype(p2)];
- if (t1[2] == t2[2])
- luaG_runerror(L, "attempt to compare two %s values", t1);
- else
- luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
- return 0;
-}
-
-
-static void addinfo (lua_State *L, const char *msg) {
- CallInfo *ci = L->ci;
- if (isLua(ci)) { /* is Lua code? */
- char buff[LUA_IDSIZE]; /* add file:line information */
- int line = currentline(L, ci);
- luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE);
- luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
- }
-}
-
-
-void luaG_errormsg (lua_State *L) {
- if (L->errfunc != 0) { /* is there an error handling function? */
- StkId errfunc = restorestack(L, L->errfunc);
- if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
- setobjs2s(L, L->top, L->top - 1); /* move argument */
- setobjs2s(L, L->top - 1, errfunc); /* push function */
- incr_top(L);
- luaD_call(L, L->top - 2, 1); /* call it */
- }
- luaD_throw(L, LUA_ERRRUN);
-}
-
-
-void luaG_runerror (lua_State *L, const char *fmt, ...) {
- va_list argp;
- va_start(argp, fmt);
- addinfo(L, luaO_pushvfstring(L, fmt, argp));
- va_end(argp);
- luaG_errormsg(L);
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 16:34:05 +0000