Bug 55780 – REGRESSION (r79863): platform/win/plugins/draws-gradient.html crashing in WindowedPluginTest::staticWndProc on Windows 7 Release (WebKit2 Tests)

• Component: Plug-ins
• Status: RESOLVED DUPLICATE

[Jessie Berlin]

http://build.webkit.org/results/Windows%207%20Release%20(WebKit2%20Tests)/r80350%20(3727)/results.html

I am not yet sure when this started (it has be crashing for at least a day now), but it should probably be added to the WebKit2 Windows Skipped list for now (until it can be investigated further).

[Jessie Berlin]

Added to the skip list in http://trac.webkit.org/changeset/80363

[Jessie Berlin]

<rdar://problem/9087600>

[Adam Roben (:aroben)]

This is happening to platform/win/plugins/window-geometry-initialized-before-set-window.html now. This makes me think the previous test, draws-gradient.html, is the actual culprit.

http://build.webkit.org/results/Windows%207%20Release%20(WebKit2%20Tests)/r81444%20(4259)/platform/win/plugins/window-geometry-initialized-before-set-window-crash-log.txt

[Adam Roben (:aroben)]

I can't reproduce the crash.

[Adam Roben (:aroben)]

I think this crash indicates that we aren't calling NPP_SetWindow with a null HWND before destroying the plugin.

[Adam Roben (:aroben)]

In fact, draws-gradient.html is the only test that uses the WindowedPluginTest class, so it has to be the problem!

[Adam Roben (:aroben)]

Switched to skipping draws-gradient.html

Committed r81455: <http://trac.webkit.org/changeset/81455>

[Adam Roben (:aroben)]

I think the crash is due to bug 47009.

[Adam Roben (:aroben)]

My guess is that r79863, which made WebKitTestRunner force all tests to paint, made the crash start happening. But I'm still pretty sure the crash is ultimately due to bug 47009.

[Adam Roben (:aroben)]

Rolling out r79863 doesn't make the crash go away, so I guess that part of my theory is incorrect.

[Adam Roben (:aroben)]

Did not crash:
http://build.webkit.org/old-results/Windows%207%20Release%20(WebKit2%20Tests)/r79859%20%283524%29/results.html

Did crash:
http://build.webkit.org/old-results/Windows%207%20Release%20(WebKit2%20Tests)/r80175%20%283652%29/results.html

All test runs in between those exited early due to crashes in FrameView::paintOverhangAreas.

[Adam Roben (:aroben)]

(In reply to comment #10)
> Rolling out r79863 doesn't make the crash go away, so I guess that part of my theory is incorrect.

Whoops, I forgot to remove the WKViewSetIsInWindow(true) call that r79863 added. Removing that does make the crash go away (because the plugin is never started).

[Adam Roben (:aroben)]

This test crashes in Firefox, too.

[Adam Roben (:aroben)]

To reproduce in Firefox:

1. Copy npTestNetscapePlugin.dll to C:\Program Files\Mozilla Firefox\plugins
2. Open draws-gradient.html in Firefox
3. Reload

Here's the Firefox backtrace, for posterity:


>	npTestNetscapePlugin.dll!WindowedPluginTest::staticWndProc(HWND__ * hwnd=0x00180798, unsigned int message=24, unsigned int wParam=0, long lParam=0)  Line 66 + 0x1a bytes	C++
 	user32.dll!_InternalCallWinProc@20()  + 0x28 bytes	
 	user32.dll!_UserCallWinProcCheckWow@32()  + 0xb7 bytes	
 	user32.dll!_DispatchClientMessage@20()  + 0x4d bytes	
 	user32.dll!___fnDWORD@4()  + 0x24 bytes	
 	ntdll.dll!_KiUserCallbackDispatcher@12()  + 0x13 bytes	
 	user32.dll!_NtUserDestroyWindow@4()  + 0xc bytes	
 	xul.dll!mozilla::plugins::PPluginInstanceChild::OnCallReceived(const IPC::Message & __msg={...}, IPC::Message * & __reply=0x00000000)  Line 1865 + 0x12 bytes	C++
 	xul.dll!mozilla::plugins::PPluginModuleChild::OnCallReceived(const IPC::Message & __msg={...}, IPC::Message * & __reply=0x00000000)  Line 574 + 0xb bytes	C++
 	xul.dll!mozilla::ipc::RPCChannel::DispatchIncall(const IPC::Message & call={...})  Line 513	C++
 	xul.dll!mozilla::ipc::RPCChannel::Incall(const IPC::Message & call={...}, unsigned int stackDepth=0)  Line 499	C++
 	xul.dll!mozilla::ipc::RPCChannel::OnMaybeDequeueOne()  Line 429 + 0xf bytes	C++
 	xul.dll!MessageLoop::RunTask(Task * task=0x00000000)  Line 344	C++
 	xul.dll!MessageLoop::DeferOrRunPendingTask(const MessageLoop::PendingTask & pending_task={...})  Line 354	C++
 	xul.dll!MessageLoop::DoWork()  Line 451 + 0x7 bytes	C++
 	xul.dll!base::MessagePumpForUI::DoRunLoop()  Line 213 + 0x7 bytes	C++
 	xul.dll!base::MessagePumpWin::RunWithDispatcher(base::MessagePump::Delegate * delegate=0x00000000, base::MessagePumpWin::Dispatcher * dispatcher=0x0012f9d8)  Line 54	C++
 	xul.dll!base::MessagePumpWin::Run(base::MessagePump::Delegate * delegate=0x0012fe80)  Line 78 + 0xc bytes	C++
 	xul.dll!MessageLoop::RunInternal()  Line 219 + 0x9 bytes	C++
 	xul.dll!MessageLoop::RunHandler()  + 0x1d792f bytes	C++
 	xul.dll!MessageLoop::Run()  Line 177	C++
 	xul.dll!XRE_InitChildProcess(int aArgc=10, char * * aArgv=0x008153d0, GeckoProcessType aProcess=GeckoProcessType_Plugin)  Line 519	C++
 	plugin-container.exe!wmain(int argc=1, wchar_t * * argv=0x00801c00)  Line 128 + 0x33 bytes	C++
 	plugin-container.exe!__tmainCRTStartup()  Line 591 + 0x19 bytes	C
 	kernel32.dll!_BaseProcessStart@4()  + 0x23 bytes

[Adam Roben (:aroben)]

*** This bug has been marked as a duplicate of bug 47009 ***