From 6c1ab7da376ae7f78a075dda5c5be0dabce20931 Mon Sep 17 00:00:00 2001 From: pixel Date: Fri, 27 Jul 2007 10:05:52 +0000 Subject: Upgrading to Lua-5.1.2 --- lib/lua/src/lvm.c | 829 ++++++++++++++++++++++++++---------------------------- 1 file changed, 397 insertions(+), 432 deletions(-) (limited to 'lib/lua/src/lvm.c') diff --git a/lib/lua/src/lvm.c b/lib/lua/src/lvm.c index 5103140..52f65e6 100644 --- a/lib/lua/src/lvm.c +++ b/lib/lua/src/lvm.c @@ -1,18 +1,16 @@ /* -** $Id: lvm.c,v 1.10 2007-07-25 16:54:32 pixel Exp $ +** $Id: lvm.c,v 1.11 2007-07-27 10:05:54 pixel Exp $ ** Lua virtual machine ** See Copyright Notice in lua.h */ -#include +#include #include #include -/* needed only when `lua_number2str' uses `sprintf' */ -#include - #define lvm_c +#define LUA_CORE #include "lua.h" @@ -30,17 +28,11 @@ -/* function to convert a lua_Number to a string */ -#ifndef lua_number2str -#define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n)) -#endif - - /* limit for table tag-method chains (to avoid loops) */ #define MAXTAGLOOP 100 -const TObject *luaV_tonumber (const TObject *obj, TObject *n) { +const TValue *luaV_tonumber (const TValue *obj, TValue *n) { lua_Number num; if (ttisnumber(obj)) return obj; if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) { @@ -53,149 +45,105 @@ const TObject *luaV_tonumber (const TObject *obj, TObject *n) { int luaV_tostring (lua_State *L, StkId obj) { -#if 0 if (!ttisnumber(obj)) return 0; else { - char s[32]; /* 16 digits, sign, point and \0 (+ some extra...) */ - lua_number2str(s, nvalue(obj)); - setsvalue2s(obj, luaS_new(L, s)); + char s[LUAI_MAXNUMBER2STR]; + lua_Number n = nvalue(obj); + lua_number2str(s, n); + setsvalue2s(L, obj, luaS_new(L, s)); return 1; } -#else - if (ttisnumber(obj)) { - char s[32]; /* 16 digits, sign, point and \0 (+ some extra...) */ - lua_number2str(s, nvalue(obj)); - setsvalue2s(obj, luaS_new(L, s)); - return 1; - } else if (ttisboolean(obj)) { - if (bvalue(obj)) - setsvalue2s(obj, luaS_new(L, "(true)")) - else - setsvalue2s(obj, luaS_new(L, "(false)")); - return 1; - } else if (ttisnil(obj)) { - setsvalue(obj, luaS_new(L, "(nil)")); - return 1; - } else { - return 0; - } -#endif } -static void traceexec (lua_State *L) { +static void traceexec (lua_State *L, const Instruction *pc) { lu_byte mask = L->hookmask; - if (mask & LUA_MASKCOUNT) { /* instruction-hook set? */ + const Instruction *oldpc = L->savedpc; + L->savedpc = pc; + if (mask > LUA_MASKLINE) { /* instruction-hook set? */ if (L->hookcount == 0) { resethookcount(L); luaD_callhook(L, LUA_HOOKCOUNT, -1); - return; } } if (mask & LUA_MASKLINE) { - CallInfo *ci = L->ci; - Proto *p = ci_func(ci)->l.p; - int newline = getline(p, pcRel(*ci->u.l.pc, p)); - if (!L->hookinit) { - luaG_inithooks(L); - return; - } - lua_assert(ci->state & CI_HASFRAME); - if (pcRel(*ci->u.l.pc, p) == 0) /* tracing may be starting now? */ - ci->u.l.savedpc = *ci->u.l.pc; /* initialize `savedpc' */ - /* calls linehook when enters a new line or jumps back (loop) */ - if (*ci->u.l.pc <= ci->u.l.savedpc || - newline != getline(p, pcRel(ci->u.l.savedpc, p))) { + Proto *p = ci_func(L->ci)->l.p; + int npc = pcRel(pc, p); + int newline = getline(p, npc); + /* call linehook when enter a new function, when jump back (loop), + or when enter a new line */ + if (npc == 0 || pc <= oldpc || newline != getline(p, pcRel(oldpc, p))) luaD_callhook(L, LUA_HOOKLINE, newline); - ci = L->ci; /* previous call may reallocate `ci' */ - } - ci->u.l.savedpc = *ci->u.l.pc; } } -static void callTMres (lua_State *L, const TObject *f, - const TObject *p1, const TObject *p2) { - setobj2s(L->top, f); /* push function */ - setobj2s(L->top+1, p1); /* 1st argument */ - setobj2s(L->top+2, p2); /* 2nd argument */ - luaD_checkstack(L, 3); /* cannot check before (could invalidate p1, p2) */ +static void callTMres (lua_State *L, StkId res, const TValue *f, + const TValue *p1, const TValue *p2) { + ptrdiff_t result = savestack(L, res); + setobj2s(L, L->top, f); /* push function */ + setobj2s(L, L->top+1, p1); /* 1st argument */ + setobj2s(L, L->top+2, p2); /* 2nd argument */ + luaD_checkstack(L, 3); L->top += 3; luaD_call(L, L->top - 3, 1); - L->top--; /* result will be in L->top */ + res = restorestack(L, result); + L->top--; + setobjs2s(L, res, L->top); } -static void callTM (lua_State *L, const TObject *f, - const TObject *p1, const TObject *p2, const TObject *p3) { - setobj2s(L->top, f); /* push function */ - setobj2s(L->top+1, p1); /* 1st argument */ - setobj2s(L->top+2, p2); /* 2nd argument */ - setobj2s(L->top+3, p3); /* 3th argument */ - luaD_checkstack(L, 4); /* cannot check before (could invalidate p1...p3) */ +static void callTM (lua_State *L, const TValue *f, const TValue *p1, + const TValue *p2, const TValue *p3) { + setobj2s(L, L->top, f); /* push function */ + setobj2s(L, L->top+1, p1); /* 1st argument */ + setobj2s(L, L->top+2, p2); /* 2nd argument */ + setobj2s(L, L->top+3, p3); /* 3th argument */ + luaD_checkstack(L, 4); L->top += 4; luaD_call(L, L->top - 4, 0); } -static const TObject *luaV_index (lua_State *L, const TObject *t, - TObject *key, int loop) { - const TObject *tm = fasttm(L, hvalue(t)->metatable, TM_INDEX); - if (tm == NULL) return &luaO_nilobject; /* no TM */ - if (ttisfunction(tm)) { - callTMres(L, tm, t, key); - return L->top; - } - else return luaV_gettable(L, tm, key, loop); -} - -static const TObject *luaV_getnotable (lua_State *L, const TObject *t, - TObject *key, int loop) { - const TObject *tm = luaT_gettmbyobj(L, t, TM_INDEX); - if (ttisnil(tm)) - luaG_typeerror(L, t, "index"); - if (ttisfunction(tm)) { - callTMres(L, tm, t, key); - return L->top; - } - else return luaV_gettable(L, tm, key, loop); -} - - -/* -** Function to index a table. -** Receives the table at `t' and the key at `key'. -** leaves the result at `res'. -*/ -const TObject *luaV_gettable (lua_State *L, const TObject *t, TObject *key, - int loop) { - if (loop > MAXTAGLOOP) - luaG_runerror(L, "loop in gettable"); - if (ttistable(t)) { /* `t' is a table? */ - Table *h = hvalue(t); - const TObject *v = luaH_get(h, key); /* do a primitive get */ - if (!ttisnil(v)) return v; - else return luaV_index(L, t, key, loop+1); +void luaV_gettable (lua_State *L, const TValue *t, TValue *key, StkId val) { + int loop; + for (loop = 0; loop < MAXTAGLOOP; loop++) { + const TValue *tm; + if (ttistable(t)) { /* `t' is a table? */ + Table *h = hvalue(t); + const TValue *res = luaH_get(h, key); /* do a primitive get */ + if (!ttisnil(res) || /* result is no nil? */ + (tm = fasttm(L, h->metatable, TM_INDEX)) == NULL) { /* or no TM? */ + setobj2s(L, val, res); + return; + } + /* else will try the tag method */ + } + else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_INDEX))) + luaG_typeerror(L, t, "index"); + if (ttisfunction(tm)) { + callTMres(L, val, tm, t, key); + return; + } + t = tm; /* else repeat with `tm' */ } - else return luaV_getnotable(L, t, key, loop+1); + luaG_runerror(L, "loop in gettable"); } -/* -** Receives table at `t', key at `key' and value at `val'. -*/ -void luaV_settable (lua_State *L, const TObject *t, TObject *key, StkId val) { - const TObject *tm; - int loop = 0; - do { +void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) { + int loop; + for (loop = 0; loop < MAXTAGLOOP; loop++) { + const TValue *tm; if (ttistable(t)) { /* `t' is a table? */ Table *h = hvalue(t); - TObject *oldval = luaH_set(L, h, key); /* do a primitive set */ + TValue *oldval = luaH_set(L, h, key); /* do a primitive set */ if (!ttisnil(oldval) || /* result is no nil? */ (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */ - setobj2t(oldval, val); /* write barrier */ + setobj2t(L, oldval, val); + luaC_barriert(L, h, val); return; } /* else will try the tag method */ @@ -207,29 +155,26 @@ void luaV_settable (lua_State *L, const TObject *t, TObject *key, StkId val) { return; } t = tm; /* else repeat with `tm' */ - } while (++loop <= MAXTAGLOOP); + } luaG_runerror(L, "loop in settable"); } -static int call_binTM (lua_State *L, const TObject *p1, const TObject *p2, +static int call_binTM (lua_State *L, const TValue *p1, const TValue *p2, StkId res, TMS event) { - ptrdiff_t result = savestack(L, res); - const TObject *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */ + const TValue *tm = luaT_gettmbyobj(L, p1, event); /* try first operand */ if (ttisnil(tm)) tm = luaT_gettmbyobj(L, p2, event); /* try second operand */ - if (!ttisfunction(tm)) return 0; - callTMres(L, tm, p1, p2); - res = restorestack(L, result); /* previous call may change stack */ - setobjs2s(res, L->top); + if (ttisnil(tm)) return 0; + callTMres(L, res, tm, p1, p2); return 1; } -static const TObject *get_compTM (lua_State *L, Table *mt1, Table *mt2, +static const TValue *get_compTM (lua_State *L, Table *mt1, Table *mt2, TMS event) { - const TObject *tm1 = fasttm(L, mt1, event); - const TObject *tm2; + const TValue *tm1 = fasttm(L, mt1, event); + const TValue *tm2; if (tm1 == NULL) return NULL; /* no metamethod */ if (mt1 == mt2) return tm1; /* same metatables => same metamethods */ tm2 = fasttm(L, mt2, event); @@ -240,20 +185,20 @@ static const TObject *get_compTM (lua_State *L, Table *mt1, Table *mt2, } -static int call_orderTM (lua_State *L, const TObject *p1, const TObject *p2, +static int call_orderTM (lua_State *L, const TValue *p1, const TValue *p2, TMS event) { - const TObject *tm1 = luaT_gettmbyobj(L, p1, event); - const TObject *tm2; + const TValue *tm1 = luaT_gettmbyobj(L, p1, event); + const TValue *tm2; if (ttisnil(tm1)) return -1; /* no metamethod? */ tm2 = luaT_gettmbyobj(L, p2, event); if (!luaO_rawequalObj(tm1, tm2)) /* different metamethods? */ return -1; - callTMres(L, tm1, p1, p2); + callTMres(L, L->top, tm1, p1, p2); return !l_isfalse(L->top); } -static int luaV_strcmp (const TString *ls, const TString *rs) { +static int l_strcmp (const TString *ls, const TString *rs) { const char *l = getstr(ls); size_t ll = ls->tsv.len; const char *r = getstr(rs); @@ -275,28 +220,28 @@ static int luaV_strcmp (const TString *ls, const TString *rs) { } -int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r) { +int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) { int res; if (ttype(l) != ttype(r)) return luaG_ordererror(L, l, r); else if (ttisnumber(l)) - return nvalue(l) < nvalue(r); + return luai_numlt(nvalue(l), nvalue(r)); else if (ttisstring(l)) - return luaV_strcmp(tsvalue(l), tsvalue(r)) < 0; + return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0; else if ((res = call_orderTM(L, l, r, TM_LT)) != -1) return res; return luaG_ordererror(L, l, r); } -static int luaV_lessequal (lua_State *L, const TObject *l, const TObject *r) { +static int lessequal (lua_State *L, const TValue *l, const TValue *r) { int res; if (ttype(l) != ttype(r)) return luaG_ordererror(L, l, r); else if (ttisnumber(l)) - return nvalue(l) <= nvalue(r); + return luai_numle(nvalue(l), nvalue(r)); else if (ttisstring(l)) - return luaV_strcmp(tsvalue(l), tsvalue(r)) <= 0; + return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0; else if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */ return res; else if ((res = call_orderTM(L, r, l, TM_LT)) != -1) /* else try `lt' */ @@ -305,17 +250,17 @@ static int luaV_lessequal (lua_State *L, const TObject *l, const TObject *r) { } -int luaV_equalval (lua_State *L, const TObject *t1, const TObject *t2) { - const TObject *tm; +int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2) { + const TValue *tm; lua_assert(ttype(t1) == ttype(t2)); switch (ttype(t1)) { case LUA_TNIL: return 1; - case LUA_TNUMBER: return nvalue(t1) == nvalue(t2); + case LUA_TNUMBER: return luai_numeq(nvalue(t1), nvalue(t2)); case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2); /* true must be 1 !! */ case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2); case LUA_TUSERDATA: { if (uvalue(t1) == uvalue(t2)) return 1; - tm = get_compTM(L, uvalue(t1)->uv.metatable, uvalue(t2)->uv.metatable, + tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable, TM_EQ); break; /* will try TM */ } @@ -327,7 +272,7 @@ int luaV_equalval (lua_State *L, const TObject *t1, const TObject *t2) { default: return gcvalue(t1) == gcvalue(t2); } if (tm == NULL) return 0; /* no TM? */ - callTMres(L, tm, t1, t2); /* call TM */ + callTMres(L, L->top, tm, t1, t2); /* call TM */ return !l_isfalse(L->top); } @@ -336,28 +281,30 @@ void luaV_concat (lua_State *L, int total, int last) { do { StkId top = L->base + last + 1; int n = 2; /* number of elements handled in this pass (at least 2) */ - if (!tostring(L, top-2) || !tostring(L, top-1)) { + if (!(ttisstring(top-2) || ttisnumber(top-2)) || !tostring(L, top-1)) { if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT)) luaG_concaterror(L, top-2, top-1); - } else if (tsvalue(top-1)->tsv.len > 0) { /* if len=0, do nothing */ + } else if (tsvalue(top-1)->len == 0) /* second op is empty? */ + (void)tostring(L, top - 2); /* result is first op (as string) */ + else { /* at least two string values; get as many as possible */ - size_t tl = tsvalue(top-1)->tsv.len; + size_t tl = tsvalue(top-1)->len; char *buffer; int i; /* collect total length */ for (n = 1; n < total && tostring(L, top-n-1); n++) { - size_t l = tsvalue(top-n-1)->tsv.len; + size_t l = tsvalue(top-n-1)->len; if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow"); tl += l; } buffer = luaZ_openspace(L, &G(L)->buff, tl); tl = 0; for (i=n; i>0; i--) { /* concat all strings */ - size_t l = tsvalue(top-i)->tsv.len; + size_t l = tsvalue(top-i)->len; memcpy(buffer+tl, svalue(top-i), l); tl += l; } - setsvalue2s(top-n, luaS_newlstr(L, buffer, tl)); + setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl)); } total -= n-1; /* got `n' strings to create 1 new */ last -= n-1; @@ -365,27 +312,21 @@ void luaV_concat (lua_State *L, int total, int last) { } -static void Arith (lua_State *L, StkId ra, - const TObject *rb, const TObject *rc, TMS op) { - TObject tempb, tempc; - const TObject *b, *c; +static void Arith (lua_State *L, StkId ra, const TValue *rb, + const TValue *rc, TMS op) { + TValue tempb, tempc; + const TValue *b, *c; if ((b = luaV_tonumber(rb, &tempb)) != NULL && (c = luaV_tonumber(rc, &tempc)) != NULL) { + lua_Number nb = nvalue(b), nc = nvalue(c); switch (op) { - case TM_ADD: setnvalue(ra, nvalue(b) + nvalue(c)); break; - case TM_SUB: setnvalue(ra, nvalue(b) - nvalue(c)); break; - case TM_MUL: setnvalue(ra, nvalue(b) * nvalue(c)); break; - case TM_DIV: setnvalue(ra, nvalue(b) / nvalue(c)); break; - case TM_POW: { - const TObject *f = luaH_getstr(hvalue(gt(L)), G(L)->tmname[TM_POW]); - ptrdiff_t res = savestack(L, ra); - if (!ttisfunction(f)) - luaG_runerror(L, "`__pow' (`^' operator) is not a function"); - callTMres(L, f, b, c); - ra = restorestack(L, res); /* previous call may change stack */ - setobjs2s(ra, L->top); - break; - } + case TM_ADD: setnvalue(ra, luai_numadd(nb, nc)); break; + case TM_SUB: setnvalue(ra, luai_numsub(nb, nc)); break; + case TM_MUL: setnvalue(ra, luai_nummul(nb, nc)); break; + case TM_DIV: setnvalue(ra, luai_numdiv(nb, nc)); break; + case TM_MOD: setnvalue(ra, luai_nummod(nb, nc)); break; + case TM_POW: setnvalue(ra, luai_numpow(nb, nc)); break; + case TM_UNM: setnvalue(ra, luai_numunm(nb)); break; default: lua_assert(0); break; } } @@ -399,384 +340,387 @@ static void Arith (lua_State *L, StkId ra, ** some macros for common tasks in `luaV_execute' */ -#define runtime_check(L, c) { if (!(c)) return 0; } +#define runtime_check(L, c) { if (!(c)) break; } #define RA(i) (base+GETARG_A(i)) /* to be used after possible stack reallocation */ -#define XRA(i) (L->base+GETARG_A(i)) -#define RB(i) (base+GETARG_B(i)) -#define RKB(i) ((GETARG_B(i) < MAXSTACK) ? RB(i) : k+GETARG_B(i)-MAXSTACK) -#define RC(i) (base+GETARG_C(i)) -#define RKC(i) ((GETARG_C(i) < MAXSTACK) ? RC(i) : k+GETARG_C(i)-MAXSTACK) -#define KBx(i) (k+GETARG_Bx(i)) +#define RB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgR, base+GETARG_B(i)) +#define RC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgR, base+GETARG_C(i)) +#define RKB(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, \ + ISK(GETARG_B(i)) ? k+INDEXK(GETARG_B(i)) : base+GETARG_B(i)) +#define RKC(i) check_exp(getCMode(GET_OPCODE(i)) == OpArgK, \ + ISK(GETARG_C(i)) ? k+INDEXK(GETARG_C(i)) : base+GETARG_C(i)) +#define KBx(i) check_exp(getBMode(GET_OPCODE(i)) == OpArgK, k+GETARG_Bx(i)) + + +#define dojump(L,pc,i) {(pc) += (i); luai_threadyield(L);} -#define dojump(pc, i) ((pc) += (i)) +#define Protect(x) { L->savedpc = pc; {x;}; base = L->base; } -StkId luaV_execute (lua_State *L) { +#define arith_op(op,tm) { \ + TValue *rb = RKB(i); \ + TValue *rc = RKC(i); \ + if (ttisnumber(rb) && ttisnumber(rc)) { \ + lua_Number nb = nvalue(rb), nc = nvalue(rc); \ + setnvalue(ra, op(nb, nc)); \ + } \ + else \ + Protect(Arith(L, ra, rb, rc, tm)); \ + } + + + +void luaV_execute (lua_State *L, int nexeccalls) { LClosure *cl; - TObject *k; + StkId base; + TValue *k; const Instruction *pc; - callentry: /* entry point when calling new functions */ - if (L->hookmask & LUA_MASKCALL) { - L->ci->u.l.pc = &pc; - luaD_callhook(L, LUA_HOOKCALL, -1); - } - retentry: /* entry point when returning to old functions */ - L->ci->u.l.pc = &pc; - lua_assert(L->ci->state == CI_SAVEDPC || - L->ci->state == (CI_SAVEDPC | CI_CALLING)); - L->ci->state = CI_HASFRAME; /* activate frame */ - pc = L->ci->u.l.savedpc; - cl = &clvalue(L->base - 1)->l; + reentry: /* entry point */ + lua_assert(isLua(L->ci)); + pc = L->savedpc; + cl = &clvalue(L->ci->func)->l; + base = L->base; k = cl->p->k; /* main loop of interpreter */ for (;;) { const Instruction i = *pc++; - StkId base, ra; + StkId ra; if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) && (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) { - traceexec(L); - if (L->ci->state & CI_YIELD) { /* did hook yield? */ - L->ci->u.l.savedpc = pc - 1; - L->ci->state = CI_YIELD | CI_SAVEDPC; - return NULL; - } - if (L->ci->state & CI_BREAK) { /* did hook break? */ - L->ci->state &= ~CI_BREAK; - luaG_runerror(L, "breaking"); + traceexec(L, pc); + if (L->status == LUA_YIELD) { /* did hook yield? */ + L->savedpc = pc - 1; + return; } + base = L->base; + } + if (L->do_break) { + L->do_break = 0; + luaG_runerror(L, "breaking"); } /* warning!! several calls may realloc the stack and invalidate `ra' */ - base = L->base; ra = RA(i); - lua_assert(L->ci->state & CI_HASFRAME); - lua_assert(base == L->ci->base); - lua_assert(L->top <= L->stack + L->stacksize && L->top >= base); - lua_assert(L->top == L->ci->top || - GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL || - GET_OPCODE(i) == OP_RETURN || GET_OPCODE(i) == OP_SETLISTO); + lua_assert(base == L->base && L->base == L->ci->base); + lua_assert(base <= L->top && L->top <= L->stack + L->stacksize); + lua_assert(L->top == L->ci->top || luaG_checkopenop(i)); switch (GET_OPCODE(i)) { case OP_MOVE: { - setobjs2s(ra, RB(i)); - break; + setobjs2s(L, ra, RB(i)); + continue; } case OP_LOADK: { - setobj2s(ra, KBx(i)); - break; + setobj2s(L, ra, KBx(i)); + continue; } case OP_LOADBOOL: { setbvalue(ra, GETARG_B(i)); if (GETARG_C(i)) pc++; /* skip next instruction (if C) */ - break; + continue; } case OP_LOADNIL: { - TObject *rb = RB(i); + TValue *rb = RB(i); do { setnilvalue(rb--); } while (rb >= ra); - break; + continue; } case OP_GETUPVAL: { int b = GETARG_B(i); - setobj2s(ra, cl->upvals[b]->v); - break; + setobj2s(L, ra, cl->upvals[b]->v); + continue; } case OP_GETGLOBAL: { - TObject *rb = KBx(i); - const TObject *v; - lua_assert(ttisstring(rb) && ttistable(&cl->g)); - v = luaH_getstr(hvalue(&cl->g), tsvalue(rb)); - if (!ttisnil(v)) { setobj2s(ra, v); } - else - setobj2s(XRA(i), luaV_index(L, &cl->g, rb, 0)); - break; + TValue g; + TValue *rb = KBx(i); + sethvalue(L, &g, cl->env); + lua_assert(ttisstring(rb)); + Protect(luaV_gettable(L, &g, rb, ra)); + continue; } case OP_GETTABLE: { - StkId rb = RB(i); - TObject *rc = RKC(i); - if (ttistable(rb)) { - const TObject *v = luaH_get(hvalue(rb), rc); - if (!ttisnil(v)) { setobj2s(ra, v); } - else - setobj2s(XRA(i), luaV_index(L, rb, rc, 0)); - } - else - setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0)); - break; + Protect(luaV_gettable(L, RB(i), RKC(i), ra)); + continue; } case OP_SETGLOBAL: { - lua_assert(ttisstring(KBx(i)) && ttistable(&cl->g)); - luaV_settable(L, &cl->g, KBx(i), ra); - break; + TValue g; + sethvalue(L, &g, cl->env); + lua_assert(ttisstring(KBx(i))); + Protect(luaV_settable(L, &g, KBx(i), ra)); + continue; } case OP_SETUPVAL: { - int b = GETARG_B(i); - setobj(cl->upvals[b]->v, ra); /* write barrier */ - break; + UpVal *uv = cl->upvals[GETARG_B(i)]; + setobj(L, uv->v, ra); + luaC_barrier(L, uv, ra); + continue; } case OP_SETTABLE: { - luaV_settable(L, ra, RKB(i), RKC(i)); - break; + Protect(luaV_settable(L, ra, RKB(i), RKC(i))); + continue; } case OP_NEWTABLE: { int b = GETARG_B(i); - b = fb2int(b); - sethvalue(ra, luaH_new(L, b, GETARG_C(i))); - luaC_checkGC(L); - break; + int c = GETARG_C(i); + sethvalue(L, ra, luaH_new(L, luaO_fb2int(b), luaO_fb2int(c))); + Protect(luaC_checkGC(L)); + continue; } case OP_SELF: { StkId rb = RB(i); - TObject *rc = RKC(i); - runtime_check(L, ttisstring(rc)); - setobjs2s(ra+1, rb); - if (ttistable(rb)) { - const TObject *v = luaH_getstr(hvalue(rb), tsvalue(rc)); - if (!ttisnil(v)) { setobj2s(ra, v); } - else - setobj2s(XRA(i), luaV_index(L, rb, rc, 0)); - } - else - setobj2s(XRA(i), luaV_getnotable(L, rb, rc, 0)); - break; + setobjs2s(L, ra+1, rb); + Protect(luaV_gettable(L, rb, RKC(i), ra)); + continue; } case OP_ADD: { - TObject *rb = RKB(i); - TObject *rc = RKC(i); - if (ttisnumber(rb) && ttisnumber(rc)) { - setnvalue(ra, nvalue(rb) + nvalue(rc)); - } - else - Arith(L, ra, rb, rc, TM_ADD); - break; + arith_op(luai_numadd, TM_ADD); + continue; } case OP_SUB: { - TObject *rb = RKB(i); - TObject *rc = RKC(i); - if (ttisnumber(rb) && ttisnumber(rc)) { - setnvalue(ra, nvalue(rb) - nvalue(rc)); - } - else - Arith(L, ra, rb, rc, TM_SUB); - break; + arith_op(luai_numsub, TM_SUB); + continue; } case OP_MUL: { - TObject *rb = RKB(i); - TObject *rc = RKC(i); - if (ttisnumber(rb) && ttisnumber(rc)) { - setnvalue(ra, nvalue(rb) * nvalue(rc)); - } - else - Arith(L, ra, rb, rc, TM_MUL); - break; + arith_op(luai_nummul, TM_MUL); + continue; } case OP_DIV: { - TObject *rb = RKB(i); - TObject *rc = RKC(i); - if (ttisnumber(rb) && ttisnumber(rc)) { - setnvalue(ra, nvalue(rb) / nvalue(rc)); - } - else - Arith(L, ra, rb, rc, TM_DIV); - break; + arith_op(luai_numdiv, TM_DIV); + continue; + } + case OP_MOD: { + arith_op(luai_nummod, TM_MOD); + continue; } case OP_POW: { - Arith(L, ra, RKB(i), RKC(i), TM_POW); - break; + arith_op(luai_numpow, TM_POW); + continue; } case OP_UNM: { - const TObject *rb = RB(i); - TObject temp; - if (tonumber(rb, &temp)) { - setnvalue(ra, -nvalue(rb)); + TValue *rb = RB(i); + if (ttisnumber(rb)) { + lua_Number nb = nvalue(rb); + setnvalue(ra, luai_numunm(nb)); } else { - setnilvalue(&temp); - if (!call_binTM(L, RB(i), &temp, ra, TM_UNM)) - luaG_aritherror(L, RB(i), &temp); + Protect(Arith(L, ra, rb, rb, TM_UNM)); } - break; + continue; } case OP_NOT: { int res = l_isfalse(RB(i)); /* next assignment may change this value */ setbvalue(ra, res); - break; + continue; + } + case OP_LEN: { + const TValue *rb = RB(i); + switch (ttype(rb)) { + case LUA_TTABLE: { + setnvalue(ra, cast_num(luaH_getn(hvalue(rb)))); + break; + } + case LUA_TSTRING: { + setnvalue(ra, cast_num(tsvalue(rb)->len)); + break; + } + default: { /* try metamethod */ + Protect( + if (!call_binTM(L, rb, luaO_nilobject, ra, TM_LEN)) + luaG_typeerror(L, rb, "get length of"); + ) + } + } + continue; } case OP_CONCAT: { int b = GETARG_B(i); int c = GETARG_C(i); - luaV_concat(L, c-b+1, c); /* may change `base' (and `ra') */ - base = L->base; - setobjs2s(RA(i), base+b); - luaC_checkGC(L); - break; + Protect(luaV_concat(L, c-b+1, c); luaC_checkGC(L)); + setobjs2s(L, RA(i), base+b); + continue; } case OP_JMP: { - dojump(pc, GETARG_sBx(i)); - break; + dojump(L, pc, GETARG_sBx(i)); + continue; } case OP_EQ: { - if (equalobj(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++; - else dojump(pc, GETARG_sBx(*pc) + 1); - break; + TValue *rb = RKB(i); + TValue *rc = RKC(i); + Protect( + if (equalobj(L, rb, rc) == GETARG_A(i)) + dojump(L, pc, GETARG_sBx(*pc)); + ) + pc++; + continue; } case OP_LT: { - if (luaV_lessthan(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++; - else dojump(pc, GETARG_sBx(*pc) + 1); - break; + Protect( + if (luaV_lessthan(L, RKB(i), RKC(i)) == GETARG_A(i)) + dojump(L, pc, GETARG_sBx(*pc)); + ) + pc++; + continue; } case OP_LE: { - if (luaV_lessequal(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++; - else dojump(pc, GETARG_sBx(*pc) + 1); - break; + Protect( + if (lessequal(L, RKB(i), RKC(i)) == GETARG_A(i)) + dojump(L, pc, GETARG_sBx(*pc)); + ) + pc++; + continue; } case OP_TEST: { - TObject *rb = RB(i); - if (l_isfalse(rb) == GETARG_C(i)) pc++; - else { - setobjs2s(ra, rb); - dojump(pc, GETARG_sBx(*pc) + 1); + if (l_isfalse(ra) != GETARG_C(i)) + dojump(L, pc, GETARG_sBx(*pc)); + pc++; + continue; + } + case OP_TESTSET: { + TValue *rb = RB(i); + if (l_isfalse(rb) != GETARG_C(i)) { + setobjs2s(L, ra, rb); + dojump(L, pc, GETARG_sBx(*pc)); } - break; + pc++; + continue; } - case OP_CALL: - case OP_TAILCALL: { - StkId firstResult; + case OP_CALL: { int b = GETARG_B(i); - int nresults; + int nresults = GETARG_C(i) - 1; if (b != 0) L->top = ra+b; /* else previous instruction set top */ - nresults = GETARG_C(i) - 1; - firstResult = luaD_precall(L, ra); - if (firstResult) { - if (firstResult > L->top) { /* yield? */ - lua_assert(L->ci->state == (CI_C | CI_YIELD)); - (L->ci - 1)->u.l.savedpc = pc; - (L->ci - 1)->state = CI_SAVEDPC; - return NULL; + L->savedpc = pc; + switch (luaD_precall(L, ra, nresults)) { + case PCRLUA: { + nexeccalls++; + goto reentry; /* restart luaV_execute over new Lua function */ } - /* it was a C function (`precall' called it); adjust results */ - luaD_poscall(L, nresults, firstResult); - if (nresults >= 0) L->top = L->ci->top; - } - else { /* it is a Lua function */ - if (GET_OPCODE(i) == OP_CALL) { /* regular call? */ - (L->ci-1)->u.l.savedpc = pc; /* save `pc' to return later */ - (L->ci-1)->state = (CI_SAVEDPC | CI_CALLING); + case PCRC: { + /* it was a C function (`precall' called it); adjust results */ + if (nresults >= 0) L->top = L->ci->top; + base = L->base; + continue; } - else { /* tail call: put new frame in place of previous one */ + default: { + return; /* yield */ + } + } + } + case OP_TAILCALL: { + int b = GETARG_B(i); + if (b != 0) L->top = ra+b; /* else previous instruction set top */ + L->savedpc = pc; + lua_assert(GETARG_C(i) - 1 == LUA_MULTRET); + switch (luaD_precall(L, ra, LUA_MULTRET)) { + case PCRLUA: { + /* tail call: put new frame in place of previous one */ + CallInfo *ci = L->ci - 1; /* previous frame */ int aux; - base = (L->ci - 1)->base; /* `luaD_precall' may change the stack */ - ra = RA(i); - if (L->openupval) luaF_close(L, base); - for (aux = 0; ra+aux < L->top; aux++) /* move frame down */ - setobjs2s(base+aux-1, ra+aux); - (L->ci - 1)->top = L->top = base+aux; /* correct top */ - lua_assert(L->ci->state & CI_SAVEDPC); - (L->ci - 1)->u.l.savedpc = L->ci->u.l.savedpc; - (L->ci - 1)->u.l.tailcalls++; /* one more call lost */ - (L->ci - 1)->state = CI_SAVEDPC; + StkId func = ci->func; + StkId pfunc = (ci+1)->func; /* previous function index */ + if (L->openupval) luaF_close(L, ci->base); + L->base = ci->base = ci->func + ((ci+1)->base - pfunc); + for (aux = 0; pfunc+aux < L->top; aux++) /* move frame down */ + setobjs2s(L, func+aux, pfunc+aux); + ci->top = L->top = func+aux; /* correct top */ + lua_assert(L->top == L->base + clvalue(func)->l.p->maxstacksize); + ci->savedpc = L->savedpc; + ci->tailcalls++; /* one more call lost */ L->ci--; /* remove new frame */ - L->base = L->ci->base; + goto reentry; + } + case PCRC: { /* it was a C function (`precall' called it) */ + base = L->base; + continue; + } + default: { + return; /* yield */ } - goto callentry; } - break; } case OP_RETURN: { - CallInfo *ci = L->ci - 1; /* previous function frame */ int b = GETARG_B(i); if (b != 0) L->top = ra+b-1; - lua_assert(L->ci->state & CI_HASFRAME); if (L->openupval) luaF_close(L, base); - L->ci->state = CI_SAVEDPC; /* deactivate current function */ - L->ci->u.l.savedpc = pc; - /* previous function was running `here'? */ - if (!(ci->state & CI_CALLING)) { - lua_assert((ci->state & CI_C) || ci->u.l.pc != &pc); - return ra; /* no: return */ - } + L->savedpc = pc; + b = luaD_poscall(L, ra); + if (--nexeccalls == 0) /* was previous function running `here'? */ + return; /* no: return */ else { /* yes: continue its execution */ - int nresults; - lua_assert(ttisfunction(ci->base - 1) && (ci->state & CI_SAVEDPC)); - lua_assert(GET_OPCODE(*(ci->u.l.savedpc - 1)) == OP_CALL); - nresults = GETARG_C(*(ci->u.l.savedpc - 1)) - 1; - luaD_poscall(L, nresults, ra); - if (nresults >= 0) L->top = L->ci->top; - goto retentry; + if (b) L->top = L->ci->top; + lua_assert(isLua(L->ci)); + lua_assert(GET_OPCODE(*((L->ci)->savedpc - 1)) == OP_CALL); + goto reentry; } } case OP_FORLOOP: { - lua_Number step, idx, limit; - const TObject *plimit = ra+1; - const TObject *pstep = ra+2; - if (!ttisnumber(ra)) - luaG_runerror(L, "`for' initial value must be a number"); - if (!tonumber(plimit, ra+1)) - luaG_runerror(L, "`for' limit must be a number"); - if (!tonumber(pstep, ra+2)) - luaG_runerror(L, "`for' step must be a number"); - step = nvalue(pstep); - idx = nvalue(ra) + step; /* increment index */ - limit = nvalue(plimit); - if (step > 0 ? idx <= limit : idx >= limit) { - dojump(pc, GETARG_sBx(i)); /* jump back */ - chgnvalue(ra, idx); /* update index */ + lua_Number step = nvalue(ra+2); + lua_Number idx = luai_numadd(nvalue(ra), step); /* increment index */ + lua_Number limit = nvalue(ra+1); + if (luai_numlt(0, step) ? luai_numle(idx, limit) + : luai_numle(limit, idx)) { + dojump(L, pc, GETARG_sBx(i)); /* jump back */ + setnvalue(ra, idx); /* update internal index... */ + setnvalue(ra+3, idx); /* ...and external index */ } - break; + continue; + } + case OP_FORPREP: { + const TValue *init = ra; + const TValue *plimit = ra+1; + const TValue *pstep = ra+2; + L->savedpc = pc; /* next steps may throw errors */ + if (!tonumber(init, ra)) + luaG_runerror(L, LUA_QL("for") " initial value must be a number"); + else if (!tonumber(plimit, ra+1)) + luaG_runerror(L, LUA_QL("for") " limit must be a number"); + else if (!tonumber(pstep, ra+2)) + luaG_runerror(L, LUA_QL("for") " step must be a number"); + setnvalue(ra, luai_numsub(nvalue(ra), nvalue(pstep))); + dojump(L, pc, GETARG_sBx(i)); + continue; } case OP_TFORLOOP: { - int nvar = GETARG_C(i) + 1; - StkId cb = ra + nvar + 2; /* call base */ - setobjs2s(cb, ra); - setobjs2s(cb+1, ra+1); - setobjs2s(cb+2, ra+2); + StkId cb = ra + 3; /* call base */ + setobjs2s(L, cb+2, ra+2); + setobjs2s(L, cb+1, ra+1); + setobjs2s(L, cb, ra); L->top = cb+3; /* func. + 2 args (state and index) */ - luaD_call(L, cb, nvar); + Protect(luaD_call(L, cb, GETARG_C(i))); L->top = L->ci->top; - ra = XRA(i) + 2; /* final position of first result */ - cb = ra + nvar; - do { /* move results to proper positions */ - nvar--; - setobjs2s(ra+nvar, cb+nvar); - } while (nvar > 0); - if (ttisnil(ra)) /* break loop? */ - pc++; /* skip jump (break loop) */ - else - dojump(pc, GETARG_sBx(*pc) + 1); /* jump back */ - break; - } - case OP_TFORPREP: { /* for compatibility only */ - if (ttistable(ra)) { - setobjs2s(ra+1, ra); - setobj2s(ra, luaH_getstr(hvalue(gt(L)), luaS_new(L, "next"))); + cb = RA(i) + 3; /* previous call may change the stack */ + if (!ttisnil(cb)) { /* continue loop? */ + setobjs2s(L, cb-1, cb); /* save control variable */ + dojump(L, pc, GETARG_sBx(*pc)); /* jump back */ } - dojump(pc, GETARG_sBx(i)); - break; + pc++; + continue; } - case OP_SETLIST: - case OP_SETLISTO: { - int bc; - int n; + case OP_SETLIST: { + int n = GETARG_B(i); + int c = GETARG_C(i); + int last; Table *h; + if (n == 0) { + n = cast_int(L->top - ra) - 1; + L->top = L->ci->top; + } + if (c == 0) c = cast_int(*pc++); runtime_check(L, ttistable(ra)); h = hvalue(ra); - bc = GETARG_Bx(i); - if (GET_OPCODE(i) == OP_SETLIST) - n = (bc&(LFIELDS_PER_FLUSH-1)) + 1; - else { - n = L->top - ra - 1; - L->top = L->ci->top; + last = ((c-1)*LFIELDS_PER_FLUSH) + n; + if (last > h->sizearray) /* needs more space? */ + luaH_resizearray(L, h, last); /* pre-alloc it at once */ + for (; n > 0; n--) { + TValue *val = ra+n; + setobj2t(L, luaH_setnum(L, h, last--), val); + luaC_barriert(L, h, val); } - bc &= ~(LFIELDS_PER_FLUSH-1); /* bc = bc - bc%FPF */ - for (; n > 0; n--) - setobj2t(luaH_setnum(L, h, bc+n), ra+n); /* write barrier */ - break; + continue; } case OP_CLOSE: { luaF_close(L, ra); - break; + continue; } case OP_CLOSURE: { Proto *p; @@ -784,7 +728,7 @@ StkId luaV_execute (lua_State *L) { int nup, j; p = cl->p->p[GETARG_Bx(i)]; nup = p->nups; - ncl = luaF_newLclosure(L, nup, &cl->g); + ncl = luaF_newLclosure(L, nup, cl->env); ncl->l.p = p; for (j=0; jl.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc)); } } - setclvalue(ra, ncl); - luaC_checkGC(L); - break; + setclvalue(L, ra, ncl); + Protect(luaC_checkGC(L)); + continue; + } + case OP_VARARG: { + int b = GETARG_B(i) - 1; + int j; + CallInfo *ci = L->ci; + int n = cast_int(ci->base - ci->func) - cl->p->numparams - 1; + if (b == LUA_MULTRET) { + Protect(luaD_checkstack(L, n)); + ra = RA(i); /* previous call may change the stack */ + b = n; + L->top = ra + n; + } + for (j = 0; j < b; j++) { + if (j < n) { + setobjs2s(L, ra + j, ci->base - n + j); + } + else { + setnilvalue(ra + j); + } + } + continue; } } } -- cgit v1.2.3