diff options
Diffstat (limited to 'src/pkg/runtime/proc.c')
| -rw-r--r-- | src/pkg/runtime/proc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/pkg/runtime/proc.c b/src/pkg/runtime/proc.c index 2510a421a8..8584cb6f6a 100644 --- a/src/pkg/runtime/proc.c +++ b/src/pkg/runtime/proc.c @@ -498,6 +498,14 @@ runtime·stoptheworld(void) P *p; bool wait; + // If we hold a lock, then we won't be able to stop another M + // that is blocked trying to acquire the lock. + if(g->m->locks > 0) + runtime·throw("stoptheworld: holding locks"); + // There is no evidence that stoptheworld on g0 does not work, + // we just don't do it today. + if(g == g->m->g0) + runtime·throw("stoptheworld: on g0"); runtime·lock(&runtime·sched.lock); runtime·sched.stopwait = runtime·gomaxprocs; runtime·atomicstore((uint32*)&runtime·sched.gcwaiting, 1); |