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Tweaks to make libthread tell Valgrind about its stack limits,

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so that Valgrind can detect stack overflow for me.
This commit is contained in:
rsc 2004-04-21 19:29:04 +00:00
parent cdd61ab0ae
commit a3785ca2cc
7 changed files with 60 additions and 8 deletions
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5
src/libthread/sched.c
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@ -166,14 +166,15 @@ Resched:
p = _threadgetproc();
//fprint(2, "p %p\n", p);
if((t = p->thread) != nil){
if((ulong)&p < (ulong)t->stk){ /* stack overflow */
fprint(2, "stack overflow %lux %lux\n", (ulong)&p, (ulong)t->stk);
if((ulong)&p < (ulong)t->stk+512){ /* stack overflow waiting to happen */
fprint(2, "stack overflow: stack at %lux, limit at %lux\n", (ulong)&p, (ulong)t->stk);
abort();
}
// _threaddebug(DBGSCHED, "pausing, state=%s set %p goto %p",
// psstate(t->state), &t->sched, &p->sched);
if(_setlabel(&t->sched)==0)
_gotolabel(&p->sched);
_threadstacklimit(t->stk);
return;
}else{
t = runthread(p);