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Thread: QWebView crash (qt 4.7.2)

  1. 5th June 2012, 15:12 #1
    mentalmushroom's Avatar
    mentalmushroom
    mentalmushroom is offline Advanced user
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    Default Re: QWebView crash (qt 4.7.2)

    Today I noticed QWebView suddenly crashed while browsing. I post screenshots and copy of local variables.

    callstack.jpg

    The crash was in the setUpIterator function in TextBreakIteratorQt.cpp unit. Iterator.string is a bad pointer and memcmp crashed trying to compare it with another string of length 10.

    Local data:
    Qt Code: 
    1. -		iterator	{length=10 string=0x0898f8ec <Bad Ptr> }	WebCore::TextBreakIterator &
    2. +		QTextBoundaryFinder	{t=Line s="" chars=0x0898f8ec ...}	QTextBoundaryFinder
    3. 		length	10	int
    4. +		string	0x0898f8ec <Bad Ptr>	const wchar_t *
    5. 		iterator.length	10	int
    6. +		iterator.string	0x0898f8ec <Bad Ptr>	const wchar_t *
    7. 		length	10	int
    8. +		string	0x0736af6c "Adem Kiliç﷽﷽ꮫꮫꮫꮫﻮﻮ"	const wchar_t *
    9. 		type	Line	QTextBoundaryFinder::BoundaryType
    To copy to clipboard, switch view to plain text mode 

    Callstack:
    Qt Code: 
    1. msvcr90d.dll!cmpDWORD(const void * lhs=0x0736af6c, const void * rhs=0x0898f8ec)  + 0x1c bytes	C
    2.  	msvcr90d.dll!unaligned_memcmp(const unsigned char * bLHS=0x0736af76, const unsigned char * bRHS=0x0898f8f6, unsigned int siz=10)  + 0x4aa bytes	C
    3.  	msvcr90d.dll!memcmp(const void * lhs=0x0736af6c, const void * rhs=0x0898f8ec, unsigned int siz=10)  + 0x19c bytes	C
    4. >	QtWebKitd4.dll!WebCore::setUpIterator(WebCore::TextBreakIterator & iterator={...}, QTextBoundaryFinder::BoundaryType type=Line, const wchar_t * string=0x0736af6c, int length=10)  Line 59 + 0x3d bytes	C++
    5.  	QtWebKitd4.dll!WebCore::lineBreakIterator(const wchar_t * string=0x0736af6c, int length=10)  Line 89 + 0x14 bytes	C++
    6.  	QtWebKitd4.dll!WebCore::nextBreakablePosition(const wchar_t * str=0x0736af6c, int pos=5, int len=10, bool treatNoBreakSpaceAsBreak=false)  Line 120 + 0xd bytes	C++
    7.  	QtWebKitd4.dll!WebCore::isBreakable(const wchar_t * str=0x0736af6c, int pos=5, int len=10, int & nextBreakable=4, bool breakNBSP=false)  Line 33 + 0x16 bytes	C++
    8.  	QtWebKitd4.dll!WebCore::RenderBlock::findNextLineBreak(WebCore::BidiResolver<WebCore::InlineIterator,WebCore::BidiRun> & resolver={...}, bool firstLine=true, bool & isLineEmpty=false, bool & previousLineBrokeCleanly=false, WebCore::EClear * clear=0x005fbbc0)  Line 1600 + 0x3d bytes	C++
    9.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutInlineChildren(bool relayoutChildren=true, int & repaintTop=0, int & repaintBottom=0)  Line 671 + 0x33 bytes	C++
    10.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlock(bool relayoutChildren=true)  Line 745	C++
    11.  	QtWebKitd4.dll!WebCore::RenderBlock::layout()  Line 674	C++
    12.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox * child=0x08d8ec5c, WebCore::RenderBlock::MarginInfo & marginInfo={...}, int & previousFloatBottom=0, int & maxFloatBottom=0)  Line 1364	C++
    13.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChildren(bool relayoutChildren=true, int & maxFloatBottom=0)  Line 1304	C++
    14.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlock(bool relayoutChildren=true)  Line 749	C++
    15.  	QtWebKitd4.dll!WebCore::RenderBlock::layout()  Line 674	C++
    16.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox * child=0x075e9b98, WebCore::RenderBlock::MarginInfo & marginInfo={...}, int & previousFloatBottom=0, int & maxFloatBottom=4354)  Line 1364	C++
    17.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChildren(bool relayoutChildren=false, int & maxFloatBottom=4354)  Line 1304	C++
    18.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlock(bool relayoutChildren=false)  Line 749	C++
    19.  	QtWebKitd4.dll!WebCore::RenderBlock::layout()  Line 674	C++
    20.  	QtWebKitd4.dll!WebCore::RenderObject::layoutIfNeeded()  Line 518 + 0x26 bytes	C++
    21.  	QtWebKitd4.dll!WebCore::RenderBlock::insertFloatingObject(WebCore::RenderBox * o=0x087e3898)  Line 2343	C++
    22.  	QtWebKitd4.dll!WebCore::RenderBlock::handleFloatingChild(WebCore::RenderBox * child=0x087e3898, const WebCore::RenderBlock::MarginInfo & marginInfo={...})  Line 939	C++
    23.  	QtWebKitd4.dll!WebCore::RenderBlock::handleSpecialChild(WebCore::RenderBox * child=0x087e3898, const WebCore::RenderBlock::MarginInfo & marginInfo={...})  Line 921 + 0x27 bytes	C++
    24.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChildren(bool relayoutChildren=false, int & maxFloatBottom=0)  Line 1299 + 0x10 bytes	C++
    25.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlock(bool relayoutChildren=false)  Line 749	C++
    26.  	QtWebKitd4.dll!WebCore::RenderBlock::layout()  Line 674	C++
    27.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox * child=0x07300a08, WebCore::RenderBlock::MarginInfo & marginInfo={...}, int & previousFloatBottom=1068, int & maxFloatBottom=117)  Line 1364	C++
    28.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChildren(bool relayoutChildren=false, int & maxFloatBottom=117)  Line 1304	C++
    29.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlock(bool relayoutChildren=false)  Line 749	C++
    30.  	QtWebKitd4.dll!WebCore::RenderBlock::layout()  Line 674	C++
    31.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox * child=0x077d6118, WebCore::RenderBlock::MarginInfo & marginInfo={...}, int & previousFloatBottom=1068, int & maxFloatBottom=0)  Line 1364	C++
    32.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChildren(bool relayoutChildren=false, int & maxFloatBottom=0)  Line 1304	C++
    33.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlock(bool relayoutChildren=false)  Line 749	C++
    34.  	QtWebKitd4.dll!WebCore::RenderBlock::layout()  Line 674	C++
    35.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox * child=0x077d5fe0, WebCore::RenderBlock::MarginInfo & marginInfo={...}, int & previousFloatBottom=1068, int & maxFloatBottom=0)  Line 1364	C++
    36.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlockChildren(bool relayoutChildren=false, int & maxFloatBottom=0)  Line 1304	C++
    37.  	QtWebKitd4.dll!WebCore::RenderBlock::layoutBlock(bool relayoutChildren=false)  Line 749	C++
    38.  	QtWebKitd4.dll!WebCore::RenderBlock::layout()  Line 674	C++
    39.  	QtWebKitd4.dll!WebCore::RenderView::layout()  Line 125	C++
    40.  	QtWebKitd4.dll!WebCore::FrameView::layout(bool allowSubtree=true)  Line 720	C++
    41.  	QtWebKitd4.dll!WebCore::Document::updateLayout()  Line 1432	C++
    42.  	QtWebKitd4.dll!WebCore::Document::updateLayoutIgnorePendingStylesheets()  Line 1464	C++
    43.  	QtWebKitd4.dll!WebCore::Element::offsetWidth()  Line 346	C++
    44.  	QtWebKitd4.dll!WebCore::jsElementOffsetWidth(JSC::ExecState * exec=0x08240120, JSC::JSValue slotBase={...}, const JSC::Identifier & __formal={...})  Line 297 + 0x8 bytes	C++
    45.  	QtWebKitd4.dll!JSC::PropertySlot::getValue(JSC::ExecState * exec=0x08240120, const JSC::Identifier & propertyName={...})  Line 78 + 0x26 bytes	C++
    46.  	QtWebKitd4.dll!JSC::JSValue::get(JSC::ExecState * exec=0x08240120, const JSC::Identifier & propertyName={...}, JSC::PropertySlot & slot={...})  Line 630 + 0x14 bytes	C++
    47.  	QtWebKitd4.dll!cti_op_get_by_id(void * * args=0x005fcc28)  Line 1296	C++
    48.  	052e1344()	
    49.  	QtWebKitd4.dll!JSC::FunctionExecutable::generateJITCode(JSC::ExecState * exec=0x08240120, JSC::ScopeChainNode * scopeChainNode=0x0737f310)  Line 171	C++
    50.  	07380d64()	
    51.  	QtWebKitd4.dll!JSC::Interpreter::execute(JSC::FunctionExecutable * functionExecutable=0x08c748d0, JSC::ExecState * callFrame=0x0740b9a8, JSC::JSFunction * function=0x08049d80, JSC::JSObject * thisObj=0x080443c0, const JSC::ArgList & args={...}, JSC::ScopeChainNode * scopeChain=0x08e086b0, JSC::JSValue * exception=0x0737f310)  Line 687 + 0x31 bytes	C++
    52.  	QtWebKitd4.dll!JSC::JSFunction::call(JSC::ExecState * exec=0x0740b9a8, JSC::JSValue thisValue={...}, const JSC::ArgList & args={...})  Line 122 + 0x4e bytes	C++
    53.  	QtWebKitd4.dll!JSC::call(JSC::ExecState * exec=0x0740b9a8, JSC::JSValue functionObject={...}, JSC::CallType callType=CallTypeJS, const JSC::CallData & callData={...}, JSC::JSValue thisValue={...}, const JSC::ArgList & args={...})  Line 39 + 0x2b bytes	C++
    54.  	QtWebKitd4.dll!WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext * scriptExecutionContext=, WebCore::Event * event=)  Line 115 + 0xd3 bytes	C++
    55.  	QtWebKitd4.dll!WebCore::EventTarget::fireEventListeners(WebCore::Event * event=0x0770ec88, WebCore::EventTargetData * d=0x04346198, WTF::Vector<WebCore::RegisteredEventListener,1> & entry={...})  Line 316	C++
    56.  	QtWebKitd4.dll!WebCore::EventTarget::fireEventListeners(WebCore::Event * event=0x0770ec88)  Line 281	C++
    57.  	QtWebKitd4.dll!WebCore::Node::handleLocalEvents(WebCore::Event * event=0x0770ec88)  Line 2505	C++
    58.  	QtWebKitd4.dll!WebCore::Node::dispatchGenericEvent(WTF::PassRefPtr<WebCore::Event> prpEvent={...})  Line 2645	C++
    59.  	QtWebKitd4.dll!WebCore::Node::dispatchEvent(WTF::PassRefPtr<WebCore::Event> prpEvent={...})  Line 2567 + 0x1a bytes	C++
    60.  	QtWebKitd4.dll!WebCore::Document::finishedParsing()  Line 4289	C++
    61.  	QtWebKitd4.dll!WebCore::HTMLParser::finished()  Line 1667	C++
    62.  	QtWebKitd4.dll!WebCore::HTMLTokenizer::end()  Line 1879	C++
    63.  	QtWebKitd4.dll!WebCore::HTMLTokenizer::write(const WebCore::SegmentedString & str={...}, bool appendData=true)  Line 1822	C++
    64.  	QtWebKitd4.dll!WebCore::HTMLTokenizer::timerFired(WebCore::Timer<WebCore::HTMLTokenizer> * __formal=0x0732f8a8)  Line 1856 + 0x2b bytes	C++
    65.  	QtWebKitd4.dll!WebCore::Timer<WebCore::HTMLTokenizer>::fired()  Line 98 + 0x1f bytes	C++
    66.  	QtWebKitd4.dll!WebCore::ThreadTimers::sharedTimerFiredInternal()  Line 115	C++
    67.  	QtWebKitd4.dll!WebCore::ThreadTimers::sharedTimerFired()  Line 91	C++
    68.  	QtWebKitd4.dll!WebCore::SharedTimerQt::timerEvent(QTimerEvent * ev=0x005fd7d0)  Line 118	C++
    69.  	QtCored4.dll!QObject::event(QEvent * e=0x005fd7d0)  Line 1182	C++
    70.  	QtGuid4.dll!QApplicationPrivate::notify_helper(QObject * receiver=0x04095a50, QEvent * e=0x005fd7d0)  Line 4462 + 0x11 bytes	C++
    71.  	QtGuid4.dll!QApplication::notify(QObject * receiver=0x04095a50, QEvent * e=0x005fd7d0)  Line 3862 + 0x10 bytes	C++
    72.  	QtCored4.dll!QCoreApplication::notifyInternal(QObject * receiver=0x04095a50, QEvent * event=0x005fd7d0)  Line 731 + 0x15 bytes	C++
    73.  	QtCored4.dll!QCoreApplication::sendEvent(QObject * receiver=0x04095a50, QEvent * event=0x005fd7d0)  Line 215 + 0x39 bytes	C++
    74.  	QtCored4.dll!QEventDispatcherWin32::event(QEvent * e=0x086df3d8)  Line 1139 + 0x10 bytes	C++
    75.  	QtGuid4.dll!QApplicationPrivate::notify_helper(QObject * receiver=0x03953260, QEvent * e=0x086df3d8)  Line 4462 + 0x11 bytes	C++
    76.  	QtGuid4.dll!QApplication::notify(QObject * receiver=0x03953260, QEvent * e=0x086df3d8)  Line 3862 + 0x10 bytes	C++
    77.  	QtCored4.dll!QCoreApplication::notifyInternal(QObject * receiver=0x03953260, QEvent * event=0x086df3d8)  Line 731 + 0x15 bytes	C++
    78.  	QtCored4.dll!QCoreApplication::sendEvent(QObject * receiver=0x03953260, QEvent * event=0x086df3d8)  Line 215 + 0x39 bytes	C++
    79.  	...
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    Last edited by mentalmushroom; 5th June 2012 at 15:11.
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