diff options
author | Jeremy Allison <jra@samba.org> | 2009-10-17 10:36:33 -0700 |
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committer | Jeremy Allison <jra@samba.org> | 2009-10-17 10:36:33 -0700 |
commit | 7c51fa6d699a653cafa90df8e44911b576118ebd (patch) | |
tree | 543bf9ca698e03eff81104898b33e77f1abed319 /source3/lua-5.1.4/src/ldebug.c | |
parent | cc3a6770c77ec8fe1cd63bf4c682853c56201f0c (diff) | |
parent | 3e3214fd91471bca5b6c4d3782e922d252d588fb (diff) | |
download | samba-7c51fa6d699a653cafa90df8e44911b576118ebd.tar.gz samba-7c51fa6d699a653cafa90df8e44911b576118ebd.tar.bz2 samba-7c51fa6d699a653cafa90df8e44911b576118ebd.zip |
Merge branch 'master' of ssh://jra@git.samba.org/data/git/samba
Diffstat (limited to 'source3/lua-5.1.4/src/ldebug.c')
-rw-r--r-- | source3/lua-5.1.4/src/ldebug.c | 637 |
1 files changed, 0 insertions, 637 deletions
diff --git a/source3/lua-5.1.4/src/ldebug.c b/source3/lua-5.1.4/src/ldebug.c deleted file mode 100644 index 497d54980e..0000000000 --- a/source3/lua-5.1.4/src/ldebug.c +++ /dev/null @@ -1,637 +0,0 @@ -/* -** $Id: ldebug.c,v 2.29.1.6 2008/05/08 16:56:26 roberto Exp $ -** 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 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); -} |