Bug 217730 – REGRESSION(r268423) SHOULD NEVER BE REACHED: GPUConnectionToWebProcess::didReceiveMessage(IPC::Connection &, IPC::Decoder &)

• Status: RESOLVED
• Resolution: FIXED
• Component: New Bugs

[Hector Lopez]

fast/mediastream/captureInGPUProcess.html

Test is a constant crash according to history on macOS and iOS Debug. First occurrence of a crash is at r268423 for iOS and has also been a flaky timeout. First occurrence of a crash on macOS is at r268431 but may be due to a lack of results from r268421.

History:

https://results.webkit.org/?suite=layout-tests&test=fast%2Fmediastream%2FcaptureInGPUProcess.html&platform=ios&platform=mac&style=debug

stderr log:

SHOULD NEVER BE REACHED
/Volumes/Data/slave/ios-simulator-14-debug/build/WebKitBuild/Debug-iphonesimulator/DerivedSources/WebKit2/GPUConnectionToWebProcessMessageReceiver.cpp(96) : virtual void WebKit::GPUConnectionToWebProcess::didReceiveMessage(IPC::Connection &, IPC::Decoder &)
1   0x11f1bbe89 WTFCrash
2   0x10d1cc10b WTFCrashWithInfo(int, char const*, char const*, int)
3   0x10d5e9725 WebKit::GPUConnectionToWebProcess::didReceiveMessage(IPC::Connection&, IPC::Decoder&)
4   0x10d24127f IPC::Connection::dispatchMessage(IPC::Decoder&)
5   0x10d241bd0 IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)
6   0x10d242260 IPC::Connection::dispatchOneIncomingMessage()
7   0x10d260cf8 IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_7::operator()()
8   0x10d260c0e WTF::Detail::CallableWrapper<IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_7, void>::call()
9   0x11f1e75a2 WTF::Function<void ()>::operator()() const
10  0x11f264f05 WTF::RunLoop::performWork()
11  0x11f269641 WTF::RunLoop::performWork(void*)
12  0x108ca3845 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
13  0x108ca373d __CFRunLoopDoSource0
14  0x108ca2c1f __CFRunLoopDoSources0
15  0x108c9d3f7 __CFRunLoopRun
16  0x108c9cb9e CFRunLoopRunSpecific
17  0x10868ce61 -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
18  0x10868d075 -[NSRunLoop(NSRunLoop) run]
19  0x10a5d0506 _xpc_objc_main
20  0x10a5d24aa xpc_main
21  0x10da66ad5 WebKit::XPCServiceMain(int, char const**)
22  0x10ef4fbdb WKXPCServiceMain
23  0x1084bdd62 main
24  0x10a264415 start
LEAK: 2 WebPageProxy

[Radar WebKit Bug Importer]

<rdar://problem/70308112>

[Chris Dumez]

It appears the IPC message that is not handled is RemoteAudioMediaStreamTrackRenderer::SetVolume. At first sight, I don't see a direct link to my change.

[Chris Dumez]

Ok. I think I know what's going on.

[Chris Dumez]

Created attachment 411380 [details]
Patch

[Peng Liu]

Comment on attachment 411380 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=411380&action=review

> Source/WebKit/ChangeLog:25
> +        good to have consistency between all kinds of receivers.

Good fix!

> Source/WebKit/Platform/IPC/Connection.cpp:1013
> +    // First check if there is a global message receiver and return it there is one.

Nit.
s/it there is one/it if there is one/

[Chris Dumez]

Created attachment 411384 [details]
Patch

[Geoffrey Garen]

Comment on attachment 411384 [details]
Patch

r=me

[EWS]

Committed r268500: <https://trac.webkit.org/changeset/268500>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 411384 [details].