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Bug 1744561, check that mESImpl is still non-null after dispatching a WorkerMainThreadRunnable (InitRunnable), r=jstutte

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Differential Revision: https://phabricator.services.mozilla.com/D133132
This commit is contained in:
Olli Pettay
2021-12-20 13:54:49 +00:00
parent a79c919754
commit cecb23dc24
1 changed files with 9 additions and 5 deletions
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14
dom/base/EventSource.cpp
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@@ -2038,13 +2038,17 @@ already_AddRefed<EventSource> EventSource::Constructor(
// In workers we have to keep the worker alive using a WorkerRef in order
// to dispatch messages correctly.
if (!eventSource->mESImpl->CreateWorkerRef(workerPrivate)) {
// Note, initRunnable->Dispatch may have cleared mESImpl.
if (!eventSource->mESImpl ||
!eventSource->mESImpl->CreateWorkerRef(workerPrivate)) {
// The worker is already shutting down. Let's return an already closed
// object, but marked as Connecting.
// mESImpl is nulled by this call such that EventSourceImpl is
// released before returning the object, otherwise
// it will set EventSource to a CLOSED state in its DTOR..
eventSource->mESImpl->Close();
if (eventSource->mESImpl) {
// mESImpl is nulled by this call such that EventSourceImpl is
// released before returning the object, otherwise
// it will set EventSource to a CLOSED state in its DTOR..
eventSource->mESImpl->Close();
}
eventSource->mReadyState = EventSourceImpl::CONNECTING;
return eventSource.forget();