void luaE_freethread (lua_State *L, lua_State *L1) {
luaF_close(L1, L1->stack); /* close all upvalues for this thread */
lua_assert(L1->openupval == NULL);
luai_userstatefree(L1);
freestack(L, L1);
luaM_freemem(L, fromstate(L1), state_size(lua_State));
}
LUA_API void lua_close (lua_State *L) {
#ifndef LUA_CROSS_COMPILER
int oldstate = platform_cpu_set_global_interrupts( PLATFORM_CPU_DISABLE );
lua_sethook( L, NULL, 0, 0 );
lua_crtstate = NULL;
lua_pushnil( L );
lua_rawseti( L, LUA_REGISTRYINDEX, LUA_INT_HANDLER_KEY );
elua_int_cleanup();
platform_cpu_set_global_interrupts( oldstate );
linenoise_cleanup( LINENOISE_ID_LUA );
#endif
L = G(L)->mainthread; /* only the main thread can be closed */
lua_lock(L);
luaF_close(L, L->stack); /* close all upvalues for this thread */
luaC_separateudata(L, 1); /* separate udata that have GC metamethods */
L->errfunc = 0; /* no error function during GC metamethods */
do { /* repeat until no more errors */
L->ci = L->base_ci;
L->base = L->top = L->ci->base;
L->nCcalls = L->baseCcalls = 0;
} while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
lua_assert(G(L)->tmudata == NULL);
luai_userstateclose(L);
close_state(L);
}
int vm_OP_RETURN(lua_State *L, int a, int b) {
TValue *base = L->base;
TValue *ra = base + a;
if (b != 0) L->top = ra+b-1;
if (L->openupval) luaF_close(L, base);
b = luaD_poscall(L, ra);
return PCRC;
}
static void close_state (lua_State *L) {
global_State *g = G(L);
luaF_close(L, L->stack); /* close all upvalues for this thread */
luaC_freeallobjects(L); /* collect all objects */
luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
luaZ_freebuffer(L, &g->buff);
freestack(L);
lua_assert(gettotalbytes(g) == sizeof(LG));
(*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0); /* free main block */
}
static void resetstack (lua_State *L, int status) {
L->ci = L->base_ci;
L->base = L->ci->base;
luaF_close(L, L->base); /* close eventual pending closures */
luaD_seterrorobj(L, status, L->base);
L->nCcalls = L->baseCcalls;
L->allowhook = 1;
restore_stack_limit(L);
L->errfunc = 0;
L->errorJmp = NULL;
}
static void close_state (lua_State *L) {
global_State *g = G(L);
luaF_close(L, L->stack); /* close all upvalues for this thread */
luaC_freeallobjects(L); /* collect all objects */
if (g->version) /* closing a fully built state? */
luai_userstateclose(L);
luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
freestack(L);
lua_assert(gettotalbytes(g) == sizeof(LG));
(*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0); /* free main block */
}
static void close_state (lua_State *L) {
global_State *g = G(L);
luaF_close(L, L->stack); /* close all upvalues for this thread */
luaC_freeall(L); /* collect all objects */
lua_assert(g->rootgc == obj2gco(L));
lua_assert(g->strt.nuse == 0);
luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *);
luaZ_freebuffer(L, &g->buff);
freestack(L, L);
lua_assert(g->totalbytes == sizeof(LG));
(*g->frealloc)(g->ud, fromstate(L), state_size(LG), 0);
}
int vm_OP_TAILCALL(lua_State *L, int a, int b) {
TValue *func = L->base + a;
Closure *cl;
CallInfo *ci;
StkId st, cur_func;
Proto *p;
int aux;
int tail_recur;
if (b != 0) L->top = func+b; /* else previous instruction set top */
/* current function index */
ci = L->ci;
cur_func = ci->func;
/* check for tail recursive call */
if(gcvalue(func) == gcvalue(cur_func)) {
cl = clvalue(func);
p = cl->l.p;
/* if is not a vararg function. */
tail_recur = !p->is_vararg;
L->savedpc = p->code;
} else {
tail_recur=0;
ci->savedpc = L->savedpc;
if (!ttisfunction(func)) /* `func' is not a function? */
func = luaD_tryfuncTM(L, func); /* check the `function' tag method */
cl = clvalue(func);
#ifndef NDEBUG
if(cl->l.isC) { /* can't tailcall into C functions. Causes problems with getfenv() */
luaD_precall(L, func, LUA_MULTRET);
vm_OP_RETURN(L, a, 0);
return PCRC;
}
#endif
}
/* clean up current frame to prepare to tailcall into next function. */
if (L->openupval) luaF_close(L, ci->base);
for (aux = 0; func+aux < L->top; aux++) /* move frame down */
setobjs2s(L, cur_func+aux, func+aux);
L->top = cur_func+aux;
/* JIT function calling it's self. */
if(tail_recur) {
for (st = L->top; st < ci->top; st++)
setnilvalue(st);
return PCRTAILRECUR;
}
L->base = cur_func; /* point base at new function to call. This is needed by luaD_precall. */
/* unwind stack back to luaD_precall */
return PCRTAILCALL;
}
LUA_API void lua_close (lua_State *L) {
lua_lock(L);
L = G(L)->mainthread; /* only the main thread can be closed */
luaF_close(L, L->stack); /* close all upvalues for this thread */
luaC_separateudata(L); /* separate udata that have GC metamethods */
L->errfunc = 0; /* no error function during GC metamethods */
do { /* repeat until no more errors */
L->ci = L->base_ci;
L->base = L->top = L->ci->base;
L->nCcalls = 0;
} while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
lua_assert(G(L)->tmudata == NULL);
close_state(L);
}
static void close_state (lua_State *L) {
luaF_close(L, L->stack); /* close all upvalues for this thread */
if (G(L)) { /* close global state */
luaC_sweep(L, 1); /* collect all elements */
lua_assert(G(L)->rootgc == NULL);
lua_assert(G(L)->rootudata == NULL);
luaS_freeall(L);
luaZ_freebuffer(L, &G(L)->buff);
}
freestack(L, L);
if (G(L)) {
lua_assert(G(L)->nblocks == sizeof(lua_State) + sizeof(global_State));
luaM_freelem(NULL, G(L));
}
freestate(NULL, L);
}
/* Note: upvalues are assumed to be after first two slots. */
static void push_LCL(lua_State *L, Proto *pt, Table *env)
{
Closure *cl;
int i, nup = pt->nups;
/* Adjust the number of stack slots to the number of upvalues. */
luaL_checkstack(L, nup, "too many upvalues");
lua_settop(L, 2+nup);
/* Create a closure from the subroutine prototype. */
cl = luaF_newLclosure(L, nup, env);
cl->l.p = pt;
/* Allocate new upvalues and close them. */
for (i = 0; i < nup; i++)
cl->l.upvals[i] = luaF_findupval(L, L->base + (2+i));
luaF_close(L, L->base + 2);
lua_settop(L, 2); /* Remove upvalues. */
setclvalue(L, L->top++, cl); /* Return closure on top of stack. */
luaC_checkGC(L);
}
void luaE_freethread (lua_State *L, lua_State *L1) {
luaF_close(L1, L1->stack); /* close all upvalues for this thread */
lua_assert(L1->openupval == NULL);
freestack(L, L1);
freestate(L, L1);
}
StkId luaV_execute (lua_State *L) {
LClosure *cl;
TObject *k;
const Instruction *pc;
callentry: /* entry point when calling new functions */
L->ci->u.l.pc = &pc;
if (L->hookmask & LUA_MASKCALL)
luaD_callhook(L, LUA_HOOKCALL, -1);
retentry: /* entry point when returning to old functions */
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;
k = cl->p->k;
/* main loop of interpreter */
for (;;) {
const Instruction i = *pc++;
StkId base, 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;
}
}
/* 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);
switch (GET_OPCODE(i)) {
case OP_MOVE: {
setobjs2s(ra, RB(i));
break;
}
case OP_LOADK: {
setobj2s(ra, KBx(i));
break;
}
case OP_LOADBOOL: {
setbvalue(ra, GETARG_B(i));
if (GETARG_C(i)) pc++; /* skip next instruction (if C) */
break;
}
case OP_LOADNIL: {
TObject *rb = RB(i);
do {
setnilvalue(rb--);
} while (rb >= ra);
break;
}
case OP_GETUPVAL: {
int b = GETARG_B(i);
setobj2s(ra, cl->upvals[b]->v);
break;
}
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;
}
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;
}
case OP_SETGLOBAL: {
lua_assert(ttisstring(KBx(i)) && ttistable(&cl->g));
luaV_settable(L, &cl->g, KBx(i), ra);
break;
}
case OP_SETUPVAL: {
int b = GETARG_B(i);
setobj(cl->upvals[b]->v, ra); /* write barrier */
break;
}
case OP_SETTABLE: {
luaV_settable(L, ra, RKB(i), RKC(i));
break;
}
case OP_NEWTABLE: {
int b = GETARG_B(i);
b = fb2int(b);
sethvalue(ra, luaH_new(L, b, GETARG_C(i)));
luaC_checkGC(L);
break;
}
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;
}
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;
}
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;
}
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;
}
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;
}
case OP_POW: {
Arith(L, ra, RKB(i), RKC(i), TM_POW);
break;
}
case OP_UNM: {
const TObject *rb = RB(i);
TObject temp;
if (tonumber(rb, &temp)) {
setnvalue(ra, -nvalue(rb));
}
else {
setnilvalue(&temp);
if (!call_binTM(L, RB(i), &temp, ra, TM_UNM))
luaG_aritherror(L, RB(i), &temp);
}
break;
}
case OP_NOT: {
int res = l_isfalse(RB(i)); /* next assignment may change this value */
setbvalue(ra, res);
break;
}
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;
}
case OP_JMP: {
dojump(pc, GETARG_sBx(i));
break;
}
case OP_EQ: {
if (equalobj(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
else dojump(pc, GETARG_sBx(*pc) + 1);
break;
}
case OP_LT: {
if (luaV_lessthan(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
else dojump(pc, GETARG_sBx(*pc) + 1);
break;
}
case OP_LE: {
if (luaV_lessequal(L, RKB(i), RKC(i)) != GETARG_A(i)) pc++;
else dojump(pc, GETARG_sBx(*pc) + 1);
break;
}
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);
}
break;
}
case OP_CALL:
case OP_TAILCALL: {
StkId firstResult;
int b = GETARG_B(i);
int nresults;
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;
}
/* 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);
}
else { /* tail call: put new frame in place of previous one */
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;
L->ci--; /* remove new frame */
L->base = L->ci->base;
}
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 */
}
else { /* yes: continue its execution */
int nresults;
lua_assert(ci->u.l.pc == &pc &&
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;
}
}
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 */
}
break;
}
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);
L->top = cb+3; /* func. + 2 args (state and index) */
luaD_call(L, cb, nvar);
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")));
}
dojump(pc, GETARG_sBx(i));
break;
}
case OP_SETLIST:
case OP_SETLISTO: {
int bc;
int n;
Table *h;
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;
}
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;
}
case OP_CLOSE: {
luaF_close(L, ra);
break;
}
case OP_CLOSURE: {
Proto *p;
Closure *ncl;
int nup, j;
p = cl->p->p[GETARG_Bx(i)];
nup = p->nups;
ncl = luaF_newLclosure(L, nup, &cl->g);
ncl->l.p = p;
for (j=0; j<nup; j++, pc++) {
if (GET_OPCODE(*pc) == OP_GETUPVAL)
ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];
else {
lua_assert(GET_OPCODE(*pc) == OP_MOVE);
ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));
}
}
setclvalue(ra, ncl);
luaC_checkGC(L);
break;
}
}
}
}
