diff options
Diffstat (limited to 'pkg/sentry/kernel/kernel.go')
| -rw-r--r-- | pkg/sentry/kernel/kernel.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/pkg/sentry/kernel/kernel.go b/pkg/sentry/kernel/kernel.go index 1ecf76b2b..2cdcdfc1f 100644 --- a/pkg/sentry/kernel/kernel.go +++ b/pkg/sentry/kernel/kernel.go @@ -1359,6 +1359,13 @@ func (k *Kernel) SendContainerSignal(cid string, info *arch.SignalInfo) error { // not have meaningful trace data. Rebuilding here ensures that we can do so // after tracing has been enabled. func (k *Kernel) RebuildTraceContexts() { + // We need to pause all task goroutines because Task.rebuildTraceContext() + // replaces Task.traceContext and Task.traceTask, which are + // task-goroutine-exclusive (i.e. the task goroutine assumes that it can + // access them without synchronization) for performance. + k.Pause() + defer k.Unpause() + k.extMu.Lock() defer k.extMu.Unlock() k.tasks.mu.RLock() |