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Save the scheduling state even predawn.

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This permits cgo callbacks to work when run in init code.
Otherwise cgocallback switches to the wrong stack address.

R=rsc
CC=golang-dev
https://golang.org/cl/1123043
This commit is contained in:
Ian Lance Taylor 2010-05-06 22:07:03 -07:00
parent 6d7583d5fd
commit e1b47159ab
1 changed files with 4 additions and 4 deletions
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8
src/pkg/runtime/proc.c
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@ -551,15 +551,15 @@ void
·entersyscall(void) ·entersyscall(void)
{ {
lock(&sched); lock(&sched);
// Leave SP around for gc and traceback.
// Do before notewakeup so that gc
// never sees Gsyscall with wrong stack.
gosave(&g->sched);
if(sched.predawn) { if(sched.predawn) {
unlock(&sched); unlock(&sched);
return; return;
} }
g->status = Gsyscall; g->status = Gsyscall;
// Leave SP around for gc and traceback.
// Do before notewakeup so that gc
// never sees Gsyscall with wrong stack.
gosave(&g->sched);
sched.mcpu--; sched.mcpu--;
sched.msyscall++; sched.msyscall++;
if(sched.gwait != 0) if(sched.gwait != 0)