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January 2013

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[webkit-help] [squirrelfish-dev] JIT Optimize Property Access failed
by talking1239＠gmail.com 05 Mar '13

05 Mar '13

Hi I enable ENABLE_JIT_OPTIMIZE_PROPERTY_ACCESS feature and find that it will crash when go back the home page after run follow test case, I think it is caused by the optimize propery access, so anyone know that it is caused by the arch related code or jit Infrastructure code? and if i disable ENABLE_JIT_OPTIMIZE_PROPERTY_ACCESS feature, it will run correctly. Any help explaining this would be much appreciated! test case: var Origin = new Object(); function Init() { Origin.V = [150] } for ( var i = 20; i <= 160; i *= 2 ) { //Init(i); } Init(); Init(); Init(); Origin = null; Callstack: JAVASCRIPTCORE!const JSC::JSArray::`vftable' + 2 bytes JAVASCRIPTCORE!JSC::Heap::sweep() line 1104 + 14 bytes JAVASCRIPTCORE!JSC::Heap::collectAllGarbage() line 1306 WEBKIT!WebCore::collect(void * 0x00000000) line 47 WEBKIT!WebCore::GCController::gcTimerFired(WebCore::Timer<WebCore::GCController> * 0x06a905a0 {m_object=??? m_function=??? }) line 70 WEBKIT!WebCore::Timer<WebCore::PageCache>::fired() line 98 + 20 bytes WEBKIT!WebCore::ThreadTimers::sharedTimerFiredInternal() line 115 WEBKIT!WebCore::ThreadTimers::sharedTimerFired() line 91 -- BGs/Felix Shi -- BGs/Felix Shi

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[webkit-dev] [squirrelfish-dev][webkit-help]How to debug the Alignment Error in the JIT.
by talking1239＠gmail.com 27 Jan '13

27 Jan '13

Hi When I use my browser to load some web site, sometimes it will crash with the Alignment Error, and the callstack will pointe to the jit code. I don't know how to debug this issue? anyone can give me some suggestion for how to debug the alignment error of jit? How can I get the javascript code of last execution when system crash, where should I add the debug information? my platform is wince and cpu is SH4, and I get my webkit in 2011. Any help explaining this would be much appreciated! -- BGs/Felix Shi

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