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Avoid stack resizes while recording calls to vararg functions.

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FUNCV might have been recorded twice (with ill effects).
This commit is contained in:
Mike Pall 2010-12-08 19:11:58 +01:00
parent 6a04591b7b
commit d0b283e596
1 changed files with 5 additions and 2 deletions
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7
src/lj_dispatch.c
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@ -388,9 +388,12 @@ void LJ_FASTCALL lj_dispatch_ins(lua_State *L, const BCIns *pc)
static int call_init(lua_State *L, GCfunc *fn) static int call_init(lua_State *L, GCfunc *fn)
{ {
if (isluafunc(fn)) { if (isluafunc(fn)) {
int numparams = funcproto(fn)->numparams; GCproto *pt = funcproto(fn);
int numparams = pt->numparams;
int gotparams = (int)(L->top - L->base); int gotparams = (int)(L->top - L->base);
lj_state_checkstack(L, (MSize)numparams); int need = pt->framesize;
if ((pt->flags & PROTO_IS_VARARG)) need += 1+gotparams;
lj_state_checkstack(L, (MSize)need);
numparams -= gotparams; numparams -= gotparams;
return numparams >= 0 ? numparams : 0; return numparams >= 0 ? numparams : 0;
} else { } else {