[webkit-help] DumpRenderTree.cpp, ASSERT during gTestRunner->makeWindowObject()

[Yannick Poirier]

Hello everyone,

I'm implementing DumpRenderTree.cpp, I've got my own WebKit port ( I'm not
using WebKit2).  I'm working on Linux x86_64, with JSC/JIT, rev127214
There is an ASSERT when I call 'gTestRunner->makeWindowObject()' , I don't
know what I'm doing wrong, maybe someone can give me a hint.

Basically I'm doing what other ports are doing.

/* WebCoreSupport/WebFrameLoaderClient implements
WebCore::FrameLoaderClient interface */
void
WebFrameLoaderClient::dispatchDidClearWindowObjectInWorld(DOMWrapperWorld*
world)
{
    SharedPtr<WebFrameLoadDelegate> frameLoaderDelegate =
m_webFrame->webView()->webFrameLoadDelegate();
    if (frameLoaderDelegate)
    {
        Frame* coreFrame = core(m_webFrame);
        ASSERT(coreFrame);

        if( world == mainThreadNormalWorld() )
        {
            JSGlobalContextRef context =
toGlobalRef(coreFrame->script()->globalObject(world)->globalExec());
            JSObjectRef windowObject =
toRef(coreFrame->script()->globalObject(world));
            ASSERT(windowObject);

            frameLoaderDelegate->didClearWindowObjectInWorld(m_webFrame,
context, windowObject);
        }
    }
}


/* In DumpRenderTree.cpp */
void FrameLoaderDelegate::didClearWindowObjectInWorld(WebFrame*,
JSContextRef context, JSObjectRef windowObject)
 {
        JSValueRef exception = 0;
        assert(gTestRunner);

        gTestRunner->makeWindowObject(context, windowObject, &exception);
        assert(!exception);
}

The backtrace is the following :

ASSERTION FAILED: from.isCell() &&
from.asCell()->JSCell::inherits(&WTF::RemovePointer<To>::Type::s_info)
WebKit/Source/JavaScriptCore/runtime/JSCell.h(361) : To
JSC::jsCast(JSC::JSValue) [with To = JSC::JSScope*]

p from
{u = {asInt64 = 140736154433152, ptr = 0x7fffb07df680, asBits =
{payload = -1333922176,
tag = 32767}}}

bt
#0  0x0000000000449821 in JSC::jsCast<JSC::JSScope*> (from=...)
    at /WebKit/Source/JavaScriptCore/runtime/JSCell.h:361
#1  0x0000000000448668 in JSC::Register::scope (this=0x7fffb07df890)
    at /WebKit/Source/JavaScriptCore/runtime/JSScope.h:162
#2  0x0000000000447534 in JSC::ExecState::scope (this=0x7fffb07df8a8)
    at /WebKit/Source/JavaScriptCore/interpreter/CallFrame.h:47
#3  0x0000000000448682 in JSC::ExecState::globalData (this=0x7fffb07df8a8)
    at /WebKit/Source/JavaScriptCore/runtime/JSScope.h:167
#4  0x0000000000449026 in JSC::APIEntryShim::APIEntryShim
(this=0x7fffffffd080, exec=0x7fffb07df8a8, registerThread=true)
    at /WebKit/Source/JavaScriptCore/API/APIShims.h:73
#5  0x000000000044b382 in JSObjectMake (ctx=0x7fffb07df8a8,
jsClass=0x107c7b0, data=0xfb2100)
    at /WebKit/Source/JavaScriptCore/API/JSObjectRef.cpp:79
#6  0x000000000042d561 in TestRunner::*makeWindowObject* (this=0xfb2100,
context=0x7fffb07df8a8, windowObject=0x7fffb07df680, exception=
    0x7fffffffd168) at /WebKit/Tools/DumpRenderTree/TestRunner.cpp:2258
#7  0x000000000043a963 in FrameLoadDelegate::didClearWindowObjectInWorld
(this=0xfb2010, context=0x7fffb07df8a8, windowObject=
    0x7fffb07df680) at
/WebKit/Tools/DumpRenderTree/inverto/DumpRenderTree.cpp:530
#8  0x00007ffff2f38ff5 in
WebFrameLoaderClient::dispatchDidClearWindowObjectInWorld (this=0xfba8d0,
world=0x1029160)
    at
/WebKit/Source/WebKit/inverto/WebCoreSupport/WebFrameLoaderClient.cpp:925
#9  0x00007ffff325e57d in WebCore::FrameLoader::*
dispatchDidClearWindowObjectInWorld* (this=0xfbb228, world=0x1029160)
    at /WebKit/Source/WebCore/loader/FrameLoader.cpp:3180
#10 0x00007ffff377307e in WebCore::ScriptController::initScript
(this=0xfbb668, world=0x1029160)
    at /WebKit/Source/WebCore/bindings/js/ScriptController.cpp:232
#11 0x00007ffff2f3aaf5 in WebCore::ScriptController::windowShell
(this=0xfbb668, world=0x1029160)
    at /WebKit/Source/WebCore/bindings/js/ScriptController.h:77
#12 0x00007ffff37729f5 in WebCore::ScriptController::evaluateInWorld
(this=0xfbb668, sourceCode=..., world=0x1029160)
    at /WebKit/Source/WebCore/bindings/js/ScriptController.cpp:134
#13 0x00007ffff3772c04 in WebCore::ScriptController::evaluate
(this=0xfbb668, sourceCode=...)
    at /WebKit/Source/WebCore/bindings/js/ScriptController.cpp:165
#14 0x00007ffff3c3f6ed in WebCore::ScriptElement::executeScript
(this=0x101e220, sourceCode=...)
    at /WebKit/Source/WebCore/dom/ScriptElement.cpp:301
#15 0x00007ffff317ceb6 in
WebCore::HTMLScriptRunner::executePendingScriptAndDispatchEvent
(this=0x1046e60, pendingScript=...)
    at /WebKit/Source/WebCore/html/parser/HTMLScriptRunner.cpp:139
#16 0x00007ffff317cd09 in
WebCore::HTMLScriptRunner::executeParsingBlockingScript (this=0x1046e60)
    at /WebKit/Source/WebCore/html/parser/HTMLScriptRunner.cpp:118
#17 0x00007ffff317d234 in
WebCore::HTMLScriptRunner::executeParsingBlockingScripts (this=0x1046e60)
    at /WebKit/Source/WebCore/html/parser/HTMLScriptRunner.cpp:190
#18 0x00007ffff317d3d2 in
WebCore::HTMLScriptRunner::executeScriptsWaitingForLoad (this=0x1046e60,
cachedScript=0x10a2de0)
    at /WebKit/Source/WebCore/html/parser/HTMLScriptRunner.cpp:199
#19 0x00007ffff3177dcb in WebCore::HTMLDocumentParser::notifyFinished
(this=0x1045ac0, cachedResource=0x10a2de0)
    at /WebKit/Source/WebCore/html/parser/HTMLDocumentParser.cpp:514
#20 0x00007ffff32aa41c in WebCore::CachedResource::checkNotify
(this=0x10a2de0)
    at /WebKit/Source/WebCore/loader/cache/CachedResource.cpp:248
#21 0x00007ffff32be191 in WebCore::CachedScript::data (this=0x10a2de0,
data=..., allDataReceived=true)
    at /WebKit/Source/WebCore/loader/cache/CachedScript.cpp:90
#22 0x00007ffff328664d in WebCore::SubresourceLoader::didFinishLoading
(this=0x10362e0, finishTime=0)
    at /WebKit/Source/WebCore/loader/SubresourceLoader.cpp:298
#23 0x00007ffff3282049 in WebCore::ResourceLoader::didFinishLoading
(this=0x10362e0, finishTime=0)
    at /WebKit/Source/WebCore/loader/ResourceLoader.cpp:441
#24 0x00007ffff399d7f6 in
WebCore::ResourceHandleManager::downloadTimerCallback (this=0x10334d0,
timer=0x10334d0)
    at
/WebKit/Source/WebCore/platform/network/inverto/ResourceHandleManager.cpp:425


I've compiled GTK port and tested DumpRenderTree, it works without any
problem.
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