static int setjitmode(lua_State *L, int mode)
{
int idx = 0;
if (L->base == L->top || tvisnil(L->base)) { /* jit.on/off/flush([nil]) */
mode |= LUAJIT_MODE_ENGINE;
} else {
/* jit.on/off/flush(func|proto, nil|true|false) */
if (tvisfunc(L->base) || tvisproto(L->base))
idx = 1;
else if (!tvistrue(L->base)) /* jit.on/off/flush(true, nil|true|false) */
goto err;
if (L->base+1 < L->top && tvisbool(L->base+1))
mode |= boolV(L->base+1) ? LUAJIT_MODE_ALLFUNC : LUAJIT_MODE_ALLSUBFUNC;
else
mode |= LUAJIT_MODE_FUNC;
}
if (luaJIT_setmode(L, idx, mode) != 1) {
err:
#if LJ_HASJIT
lj_err_arg(L, 1, LJ_ERR_NOLFUNC);
#else
lj_err_caller(L, LJ_ERR_NOJIT);
#endif
}
return 0;
}
GCfunc *lj_lib_checkfunc(lua_State *L, int narg)
{
TValue *o = L->base + narg-1;
if (!(o < L->top && tvisfunc(o)))
lj_err_argt(L, narg, LUA_TFUNCTION);
return funcV(o);
}
/* Handle ctype __index/__newindex metamethods. */
static int ffi_index_meta(lua_State *L, CTState *cts, CType *ct, MMS mm)
{
CTypeID id = ctype_typeid(cts, ct);
cTValue *tv = lj_ctype_meta(cts, id, mm);
TValue *base = L->base;
if (!tv) {
const char *s;
err_index:
s = strdata(lj_ctype_repr(L, id, NULL));
if (tvisstr(L->base+1))
lj_err_callerv(L, LJ_ERR_FFI_BADMEMBER, s, strVdata(L->base+1));
else
lj_err_callerv(L, LJ_ERR_FFI_BADIDX, s);
}
if (!tvisfunc(tv)) {
if (mm == MM_index) {
cTValue *o = lj_meta_tget(L, tv, base+1);
if (o) {
if (tvisnil(o)) goto err_index;
copyTV(L, L->top-1, o);
return 1;
}
} else {
TValue *o = lj_meta_tset(L, tv, base+1);
if (o) {
copyTV(L, o, base+2);
return 0;
}
}
tv = L->top-1;
}
return lj_meta_tailcall(L, tv);
}
LUA_API int lua_dump(lua_State *L, lua_Writer writer, void *data)
{
cTValue *o = L->top-1;
api_check(L, L->top > L->base);
if (tvisfunc(o) && isluafunc(funcV(o)))
return lj_bcwrite(L, funcproto(funcV(o)), writer, data, 0);
else
return 1;
}
/* Helper for calls. __call metamethod. */
void lj_meta_call(lua_State *L, TValue *func, TValue *top)
{
cTValue *mo = lj_meta_lookup(L, func, MM_call);
TValue *p;
if (!tvisfunc(mo))
lj_err_optype_call(L, func);
for (p = top; p > func; p--) copyTV(L, p, p-1);
copyTV(L, func, mo);
}
/* Return prototype of first argument (Lua function or prototype object) */
static GCproto *check_Lproto(lua_State *L, int nolua)
{
TValue *o = L->base;
if (L->top > o) {
if (tvisproto(o)) {
return protoV(o);
} else if (tvisfunc(o)) {
if (isluafunc(funcV(o)))
return funcproto(funcV(o));
else if (nolua)
return NULL;
}
}
lj_err_argt(L, 1, LUA_TFUNCTION);
return NULL; /* unreachable */
}
ptrdiff_t lj_vmevent_prepare(lua_State *L, VMEvent ev)
{
global_State *g = G(L);
GCstr *s = lj_str_newlit(L, LJ_VMEVENTS_REGKEY);
cTValue *tv = lj_tab_getstr(tabV(registry(L)), s);
if (tvistab(tv)) {
int hash = VMEVENT_HASH(ev);
tv = lj_tab_getint(tabV(tv), hash);
if (tv && tvisfunc(tv)) {
lj_state_checkstack(L, LUA_MINSTACK);
setfuncV(L, L->top++, funcV(tv));
return savestack(L, L->top);
}
}
g->vmevmask &= ~VMEVENT_MASK(ev); /* No handler: cache this fact. */
return 0;
}
/* Runtime error. */
LJ_NOINLINE void lj_err_run(lua_State *L)
{
ptrdiff_t ef = finderrfunc(L);
if (ef) {
TValue *errfunc = restorestack(L, ef);
TValue *top = L->top;
lj_trace_abort(G(L));
if (!tvisfunc(errfunc) || L->status == LUA_ERRERR) {
setstrV(L, top-1, lj_err_str(L, LJ_ERR_ERRERR));
lj_err_throw(L, LUA_ERRERR);
}
L->status = LUA_ERRERR;
copyTV(L, top, top-1);
copyTV(L, top-1, errfunc);
L->top = top+1;
lj_vm_call(L, top, 1+1); /* Stack: |errfunc|msg| -> |msg| */
}
lj_err_throw(L, LUA_ERRRUN);
}
static void jit_profile_callback(lua_State *L2, lua_State *L, int samples,
int vmstate)
{
TValue key;
cTValue *tv;
setlightudV(&key, (void *)&KEY_PROFILE_FUNC);
tv = lj_tab_get(L, tabV(registry(L)), &key);
if (tvisfunc(tv)) {
char vmst = (char)vmstate;
int status;
setfuncV(L2, L2->top++, funcV(tv));
setthreadV(L2, L2->top++, L);
setintV(L2->top++, samples);
setstrV(L2, L2->top++, lj_str_new(L2, &vmst, 1));
status = lua_pcall(L2, 3, 0, 0); /* callback(thread, samples, vmstate) */
if (status) {
if (G(L2)->panic) G(L2)->panic(L2);
exit(EXIT_FAILURE);
}
lj_trace_abort(G(L2));
}
}
/* Helper for TSET*. __newindex chain and metamethod. */
TValue *lj_meta_tset(lua_State *L, cTValue *o, cTValue *k)
{
TValue tmp;
int loop;
for (loop = 0; loop < LJ_MAX_IDXCHAIN; loop++) {
cTValue *mo;
if (LJ_LIKELY(tvistab(o))) {
GCtab *t = tabV(o);
cTValue *tv = lj_tab_get(L, t, k);
if (LJ_LIKELY(!tvisnil(tv))) {
t->nomm = 0; /* Invalidate negative metamethod cache. */
lj_gc_anybarriert(L, t);
return (TValue *)tv;
} else if (!(mo = lj_meta_fast(L, tabref(t->metatable), MM_newindex))) {
t->nomm = 0; /* Invalidate negative metamethod cache. */
lj_gc_anybarriert(L, t);
if (tv != niltv(L))
return (TValue *)tv;
if (tvisnil(k)) lj_err_msg(L, LJ_ERR_NILIDX);
else if (tvisint(k)) { setnumV(&tmp, (lua_Number)intV(k)); k = &tmp; }
else if (tvisnum(k) && tvisnan(k)) lj_err_msg(L, LJ_ERR_NANIDX);
return lj_tab_newkey(L, t, k);
}
} else if (tvisnil(mo = lj_meta_lookup(L, o, MM_newindex))) {
lj_err_optype(L, o, LJ_ERR_OPINDEX);
return NULL; /* unreachable */
}
if (tvisfunc(mo)) {
L->top = mmcall(L, lj_cont_nop, mo, o, k);
/* L->top+2 = v filled in by caller. */
return NULL; /* Trigger metamethod call. */
}
copyTV(L, &tmp, mo);
o = &tmp;
}
lj_err_msg(L, LJ_ERR_SETLOOP);
return NULL; /* unreachable */
}
/* Helper for TGET*. __index chain and metamethod. */
cTValue *lj_meta_tget(lua_State *L, cTValue *o, cTValue *k)
{
int loop;
for (loop = 0; loop < LJ_MAX_IDXCHAIN; loop++) {
cTValue *mo;
if (LJ_LIKELY(tvistab(o))) {
GCtab *t = tabV(o);
cTValue *tv = lj_tab_get(L, t, k);
if (!tvisnil(tv) ||
!(mo = lj_meta_fast(L, tabref(t->metatable), MM_index)))
return tv;
} else if (tvisnil(mo = lj_meta_lookup(L, o, MM_index))) {
lj_err_optype(L, o, LJ_ERR_OPINDEX);
return NULL; /* unreachable */
}
if (tvisfunc(mo)) {
L->top = mmcall(L, lj_cont_ra, mo, o, k);
return NULL; /* Trigger metamethod call. */
}
o = mo;
}
lj_err_msg(L, LJ_ERR_GETLOOP);
return NULL; /* unreachable */
}
/* Public API function: control the JIT engine. */
int luaJIT_setmode(lua_State *L, int idx, int mode)
{
global_State *g = G(L);
int mm = mode & LUAJIT_MODE_MASK;
lj_trace_abort(g); /* Abort recording on any state change. */
/* Avoid pulling the rug from under our own feet. */
if ((g->hookmask & HOOK_GC))
lj_err_caller(L, LJ_ERR_NOGCMM);
switch (mm) {
#if LJ_HASJIT
case LUAJIT_MODE_ENGINE:
if ((mode & LUAJIT_MODE_FLUSH)) {
lj_trace_flushall(L);
} else {
if (!(mode & LUAJIT_MODE_ON))
G2J(g)->flags &= ~(uint32_t)JIT_F_ON;
#if LJ_TARGET_X86ORX64
else if ((G2J(g)->flags & JIT_F_SSE2))
G2J(g)->flags |= (uint32_t)JIT_F_ON;
else
return 0; /* Don't turn on JIT compiler without SSE2 support. */
#else
else
G2J(g)->flags |= (uint32_t)JIT_F_ON;
#endif
lj_dispatch_update(g);
}
break;
case LUAJIT_MODE_FUNC:
case LUAJIT_MODE_ALLFUNC:
case LUAJIT_MODE_ALLSUBFUNC: {
cTValue *tv = idx == 0 ? frame_prev(L->base-1) :
idx > 0 ? L->base + (idx-1) : L->top + idx;
GCproto *pt;
if ((idx == 0 || tvisfunc(tv)) && isluafunc(&gcval(tv)->fn))
pt = funcproto(&gcval(tv)->fn); /* Cannot use funcV() for frame slot. */
else if (tvisproto(tv))
pt = protoV(tv);
else
return 0; /* Failed. */
if (mm != LUAJIT_MODE_ALLSUBFUNC)
setptmode(g, pt, mode);
if (mm != LUAJIT_MODE_FUNC)
setptmode_all(g, pt, mode);
break;
}
case LUAJIT_MODE_TRACE:
if (!(mode & LUAJIT_MODE_FLUSH))
return 0; /* Failed. */
lj_trace_flush(G2J(g), idx);
break;
#else
case LUAJIT_MODE_ENGINE:
case LUAJIT_MODE_FUNC:
case LUAJIT_MODE_ALLFUNC:
case LUAJIT_MODE_ALLSUBFUNC:
UNUSED(idx);
if ((mode & LUAJIT_MODE_ON))
return 0; /* Failed. */
break;
#endif
case LUAJIT_MODE_WRAPCFUNC:
if ((mode & LUAJIT_MODE_ON)) {
if (idx != 0) {
cTValue *tv = idx > 0 ? L->base + (idx-1) : L->top + idx;
if (tvislightud(tv))
g->wrapf = (lua_CFunction)lightudV(tv);
else
return 0; /* Failed. */
} else {
return 0; /* Failed. */
}
g->bc_cfunc_ext = BCINS_AD(BC_FUNCCW, 0, 0);
} else {
g->bc_cfunc_ext = BCINS_AD(BC_FUNCC, 0, 0);
}
break;
default:
return 0; /* Failed. */
}
