diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/pkg/runtime/panic.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/pkg/runtime/panic.c b/src/pkg/runtime/panic.c index 120f7706e7..5692c537a0 100644 --- a/src/pkg/runtime/panic.c +++ b/src/pkg/runtime/panic.c @@ -175,10 +175,19 @@ runtime·deferreturn(uintptr arg0, ...) argp = (byte*)&arg0; if(d->argp != argp) return; + + // Moving arguments around. + // Do not allow preemption here, because the garbage collector + // won't know the form of the arguments until the jmpdefer can + // flip the PC over to fn. + m->locks++; runtime·memmove(argp, d->args, d->siz); fn = d->fn; popdefer(); freedefer(d); + m->locks--; + if(m->locks == 0 && g->preempt) + g->stackguard0 = StackPreempt; runtime·jmpdefer(fn, argp); } |