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| author | rsc <devnull@localhost> | 2004-04-21 22:47:15 +0000 |
|---|---|---|
| committer | rsc <devnull@localhost> | 2004-04-21 22:47:15 +0000 |
| commit | fb36ed82ec7470efe4e334ddc054bcb4fa06ae9e (patch) | |
| tree | b01e82e380a5501ea80bcf4d5316252a2e300603 | |
| parent | 2b4b2ae19107f2c7e45ca6ab6f73c9c8a5fb84dd (diff) | |
| download | plan9port-fb36ed82ec7470efe4e334ddc054bcb4fa06ae9e.tar.gz plan9port-fb36ed82ec7470efe4e334ddc054bcb4fa06ae9e.tar.bz2 plan9port-fb36ed82ec7470efe4e334ddc054bcb4fa06ae9e.zip | |
how much stack do we need?
| -rw-r--r-- | src/libthread/sched.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/src/libthread/sched.c b/src/libthread/sched.c index 57d597ba..9ad7298b 100644 --- a/src/libthread/sched.c +++ b/src/libthread/sched.c @@ -157,6 +157,21 @@ relock: } void +needstack(int howmuch) +{ + Proc *p; + Thread *t; + + p = _threadgetproc(); + if(p == nil || (t=p->thread) == nil) + return; + if((ulong)&howmuch < (ulong)t->stk+howmuch){ /* stack overflow waiting to happen */ + fprint(2, "stack overflow: stack at 0x%lux, limit at 0x%lux, need 0x%lux\n", (ulong)&p, (ulong)t->stk, howmuch); + abort(); + } +} + +void _sched(void) { Proc *p; @@ -166,10 +181,7 @@ Resched: p = _threadgetproc(); //fprint(2, "p %p\n", p); if((t = p->thread) != nil){ - 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(); - } + needstack(512); // _threaddebug(DBGSCHED, "pausing, state=%s set %p goto %p", // psstate(t->state), &t->sched, &p->sched); if(_setlabel(&t->sched)==0) |