1669168 - Crash in [@ IPCError-browser | ShutDownKill | mozilla::ipc::MessageChannel::WaitForSyncNotify | mozilla::ipc::IProtocol::ChannelSend]

Status: RESOLVED WORKSFORME

(Core :: Graphics: WebRender, defect, P3)

Description

[Gabriele Svelto [:gsvelto] (PTO)]

Crash report: https://crash-stats.mozilla.org/report/index/ea48d1cc-cb72-485d-b48e-d227e0201004

Reason: EXCEPTION_BREAKPOINT

Top 10 frames of crashing thread:

0 ntdll.dll NtWaitForAlertByThreadId 
1 ntdll.dll RtlSleepConditionVariableSRW 
2 kernelbase.dll SleepConditionVariableSRW 
3 mozglue.dll mozilla::detail::ConditionVariableImpl::wait_for mozglue/misc/ConditionVariable_windows.cpp:58
4 xul.dll mozilla::ipc::MessageChannel::WaitForSyncNotify ipc/glue/WindowsMessageLoop.cpp:942
5 xul.dll mozilla::ipc::IProtocol::ChannelSend ipc/glue/ProtocolUtils.cpp:518
6 xul.dll mozilla::layers::PWebRenderBridgeChild::SendEnsureConnected ipc/ipdl/PWebRenderBridgeChild.cpp:73
7 xul.dll mozilla::layers::WebRenderLayerManager::Initialize gfx/layers/wr/WebRenderLayerManager.cpp:88
8 xul.dll std::_Func_impl_no_alloc<`lambda at /builds/worker/checkouts/gecko/dom/ipc/BrowserChild.cpp:2754:9', bool, mozilla::layers::LayerManager*>::_Do_call 
9 xul.dll mozilla::widget::PuppetWidget::CreateRemoteLayerManager widget/PuppetWidget.cpp:570

This appears to be an IPC deadlock. The content process whose stack can be seen above is waiting for a reply to its PWebRenderBridge.EnsureConnected() call which is synchronous, but the main process already sent the content process a shutdown message so is unlikely to reply to that message anymore. The content process is thus stuck waiting and doesn't see the shutdown message and thus the main process kills it after 20 seconds of inactivity.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Closing because no crashes reported for 12 weeks.