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Fix potential hang in UCLO redirection handling in hooks.

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Mike Pall 2010-03-10 22:13:23 +01:00
parent c56d791316
commit 4f19a15bd9
1 changed files with 7 additions and 9 deletions
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16
src/lj_dispatch.c
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@ -333,15 +333,13 @@ static void callhook(lua_State *L, int event, BCLine line)
static BCReg cur_topslot(GCproto *pt, const BCIns *pc, uint32_t nres)
{
BCIns ins = pc[-1];
for (;;) {
switch (bc_op(ins)) {
case BC_UCLO: ins = pc[bc_j(ins)]; break;
case BC_CALLM:
case BC_CALLMT: return bc_a(ins) + bc_c(ins) + nres-1+1;
case BC_RETM: return bc_a(ins) + bc_d(ins) + nres-1;
case BC_TSETM: return bc_a(ins) + nres-1;
default: return pt->framesize;
}
if (bc_op(ins) == BC_UCLO)
ins = pc[bc_j(ins)];
switch (bc_op(ins)) {
case BC_CALLM: case BC_CALLMT: return bc_a(ins) + bc_c(ins) + nres-1+1;
case BC_RETM: return bc_a(ins) + bc_d(ins) + nres-1;
case BC_TSETM: return bc_a(ins) + nres-1;
default: return pt->framesize;
}
}