712792 - Shutdown hang with nsBuiltinDecoderStateMachine::StopAudioThread

Status: NEW

(Core :: Audio/Video: Playback, defect)

Description

[:Felipe Gomes (needinfo for replies!)]

Attachment: Minidump

Webm video had stopped working on this session: the video progress would show as loaded, but pressing play would not work. This was true both for a webm video embedded in youtube's page, or for standalone webm file loaded on a tab.
Then I tried to quit Firefox and it stuck hung on shutdown eating 63% of the CPU.
I attached MSVC2010 and one of the threads had the following stack:

 	xul.dll!nsThread::ProcessNextEvent(bool mayWait=true, bool * result=0x30a5f653)  Line 596 + 0x4 bytes	C++
 	xul.dll!NS_ProcessNextEvent_P(nsIThread * thread=0x090e9860, bool mayWait=true)  Line 245 + 0xd bytes	C++
 	xul.dll!nsThread::Shutdown()  Line 502 + 0xa bytes	C++
 	xul.dll!nsBuiltinDecoderStateMachine::StopAudioThread()  Line 1185	C++
 	xul.dll!nsBuiltinDecoderStateMachine::DecodeSeek()  Line 1459	C++
 	xul.dll!nsBuiltinDecoderStateMachine::DecodeThreadRun()  Line 442 + 0x6 bytes	C++
 	xul.dll!nsRunnableMethodImpl<void (__thiscall nsBuiltinDecoder::*)(void),1>::Run()  Line 346	C++
 	xul.dll!nsThread::ProcessNextEvent(bool mayWait=true, bool * result=0x090e9801)  Line 666	C++
 	xul.dll!nsThreadStartupEvent::Run()  Line 221 + 0x8 bytes	C++
 	nspr4.dll!_PR_NativeRunThread(void * arg=)  Line 448	C
 	msvcr80.dll!_getptd_noexit()  Line 633 + 0x7 bytes	C
 	nspr4.dll!pr_root(void * arg=0x0996b5c0)  Line 122 + 0xd bytes	C
 	msvcr80.dll!_callthreadstartex()  Line 348 + 0x6 bytes	C
 	msvcr80.dll!_threadstartex(void * ptd=0x1003ad08)  Line 326 + 0x5 bytes	C
 	kernel32.dll!@BaseThreadInitThunk@12()  + 0x12 bytes	
 	ntdll.dll!___RtlUserThreadStart@8()  + 0x27 bytes	
 	ntdll.dll!__RtlUserThreadStart@8()  + 0x1b bytes	


This seems very similar to bug 687709 but since that is about StopDecodeThread and this is StopAudioThread I'm filing them separately. Feel free to mark as dup.

I got both a minidump (attached), an xperf -on latency output (50mb), and a minidump with heap (727mb) if that would help.

Xperf didn't provide much insight AFAICT, lots of unknown symbols and the typical thread starvation signs (GetCurrentThread etc.): http://i.imgur.com/TJVgI.png

Comment 1

[Matthew Gregan [:kinetik]]

What page/video did this happen with, and do you have a way to reproduce it?

Comment 2

[Wayne Mery (:wsmwk)]

Felipe ?