Bug 90065 – [Qt] segmentation fault with pluginEnabled option

• Component: WebKit Qt
• Status: RESOLVED INVALID

[C.H.]

I have 'segmenation fault' with the next url http://ecommerce.aheadworks.com/magento-extensions/iphone-theme.html

when I disabled pluginEnabled option 


- Window XP
- qt 4.8.1
- QWebSettings::PluginsEnabled
- qtwebkit version: 

This is a snapshot of the Qt port of WebKit from                                                                                                             
                                                                                                                                                             
        git://gitorious.org/qtwebkit/qtwebkit.git                                                                                                            
                                                                                                                                                             
and has the sha1 checksum                                                                                                                                    
                                                                                                                                                             
        52a11cec052aa40d3bbc06861be1177b649b4a99                                                                                                             
                                                    

look attach - test.tar.gz for test application

[C.H.]

Created attachment 149732 [details]
test application

[C.H.]

Created attachment 149733 [details]
error screenshoot

[C.H.]

I have "segmentation fault" in qtcreator debugger and the next :

LEVEL  FUNCTION                     FILE              LINE           

0	_mm_andnot_si128	emmintrin.h	1239	0x516572
1	comp_func_SourceOver_sse2	qdrawhelper_sse2.cpp	152	0x516572
2	BlendSrcGeneric<(SpanMethod)0>::process	qdrawhelper.cpp	3581	0xbb7dbf
3	handleSpans<BlendSrcGeneric<(SpanMethod)0> >	qdrawhelper.cpp	3527	0xb6cf43
4	blend_src_generic<(SpanMethod)0>	qdrawhelper.cpp	3599	0x6e75a5
5	qt_gradient_quint32	qdrawhelper.cpp	6955	0x6d83ef
6	gray_convert_glyph	qgrayraster.c	1756	0x6f3d2c
7	gray_raster_render	qgrayraster.c	1862	0x6f404b
8	QRasterPaintEnginePrivate::rasterize	qpaintengine_raster.cpp	3834	0x6cfbcd
9	QRasterPaintEnginePrivate::rasterize	qpaintengine_raster.cpp	3760	0x6cf92a
10	QRasterPaintEngine::fill	qpaintengine_raster.cpp	1753	0x6c7fe1
11	QPainter::fillPath	qpainter.cpp	3406	0x65730b
12	WebCore::GraphicsContext::fillPath(WebCore::Path const&)	D:\QtSDK\Desktop\Qt\4.8.1\mingw\lib\QtWebKitd4.dll	0	0xae1da5b
13	WebCore::CanvasRenderingContext2D::fill()	D:\QtSDK\Desktop\Qt\4.8.1\mingw\lib\QtWebKitd4.dll	0	0xace5a77
14	WebCore::JSCanvasRenderingContext2D::getConstructor(JSC::ExecState*, JSC::JSGlobalObject*)	D:\QtSDK\Desktop\Qt\4.8.1\mingw\lib\QtWebKitd4.dll	0	0xaab4830
15	??		0	0x10eb0de5
16	JSC::JITCode::execute(JSC::RegisterFile*, JSC::ExecState*, JSC::JSGlobalData*)	D:\QtSDK\Desktop\Qt\4.8.1\mingw\lib\QtWebKitd4.dll	0	0xb3b8c96
17	JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::ScopeChainNode*, JSC::JSObject*)	D:\QtSDK\Desktop\Qt\4.8.1\mingw\lib\QtWebKitd4.dll	0	0xb2a1d95
18	JSC::evaluate(JSC::ExecState*, JSC::ScopeChainNode*, JSC::SourceCode const&, JSC::JSValue)	D:\QtSDK\Desktop\Qt\4.8.1\mingw\lib\QtWebKitd4.dll	0	0xb28ce7f
19	_NPN_Evaluate	D:\QtSDK\Desktop\Qt\4.8.1\mingw\lib\QtWebKitd4.dll	0	0xb05bd26
20	npswf32!Flash_DisableLocalSecurity	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12bd5afe
21	??		0	0x11803440
22	??	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12ad58c8
23	??		0	0x179d10ae
24	??		0	0x144212c5
25	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12cc439c
26	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12c80296
27	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12cc439c
28	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12cc439c
29	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12cc439c
30	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12cc439c
31	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12c9b196
32	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12c1c22b
33	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12c1b8ef
34	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12c1bbff
35	npswf32!native_ShockwaveFlash_TCallLabel	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12c1bc90
36	??	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12b73fba
37	npswf32!Flash_DisableLocalSecurity	C:\WINDOWS\system32\macromed\Flash\NPSWF32.dll	0	0x12bd8f68
38	??		0	0x12fee000
39	??		0

[C.H.]

I think trouble with [B]Long polling[/B]

http://en.wikipedia.org/wiki/Long_polling#Long_polling
http://en.wikipedia.org/wiki/Comet_(programming)#Ajax_with_long_polling

[c0d3r]

QtWebKit v4.7.4 and v4.9.2 also affected (Windows 7 x86).

[c0d3r]

I think, it's stack alignment for sse2 instructions bug (see https://bugreports.qt-project.org/browse/QTBUG-19886 and http://sourceforge.net/tracker/?func=detail&atid=102435&aid=2967395&group_id=2435).
Now I trying to build Qt without sse2.

[c0d3r]

QtGui4.dll without sse2 instructions solves problem.
P.S.: worng platorm in bug report.

[Jocelyn Turcotte]

=== Bulk closing of Qt bugs ===

If you believe that this bug report is still relevant for a non-Qt port of webkit.org, please re-open it and remove [Qt] from the summary.

If you believe that this is still an important QtWebKit bug, please fill a new report at https://bugreports.qt-project.org and add a link to this issue. See http://qt-project.org/wiki/ReportingBugsInQt for additional guidelines.