Bug 126878 – LayoutState and subtree layout code should use RenderElement.

• Component: Layout and Rendering
• Status: REOPENED

[Andreas Kling]

Layout never starts from RenderText.

[Andreas Kling]

Created attachment 221019 [details]
Patch

[WebKit Commit Bot]

Attachment 221019 [details] did not pass style-queue:

Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebCore/ChangeLog', u'Source/WebCore/page/FrameView.cpp', u'Source/WebCore/rendering/LayoutState.cpp', u'Source/WebCore/rendering/LayoutState.h', u'Source/WebCore/rendering/RenderView.cpp', u'Source/WebCore/rendering/RenderView.h', '--commit-queue']" exit_code: 1
ERROR: Source/WebCore/rendering/RenderView.cpp:1078:  Missing space before ( in while(  [whitespace/parens] [5]
Total errors found: 1 in 6 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Andreas Kling]

Created attachment 221022 [details]
Patch

[Antti Koivisto]

Comment on attachment 221022 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=221022&action=review

> Source/WebCore/rendering/RenderElement.cpp:1036
> +    if (!documentBeingDestroyed() && view().frameView().layoutRoot() == this) {
> +        ASSERT_NOT_REACHED();
> +        // This indicates a failure to layout the child, which is why
> +        // the layout root is still set to |this|. Make sure to clear it
> +        // since we are getting destroyed.
> +        view().frameView().clearLayoutRoot();
> +    }

Wonder if this could just be an assert.

[Andreas Kling]

Created attachment 244932 [details]
Patch for landing

[WebKit Commit Bot]

Comment on attachment 244932 [details]
Patch for landing

Clearing flags on attachment: 244932

Committed r178683: <http://trac.webkit.org/changeset/178683>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Joseph Pecoraro]

Looks like this may have caused a lot of crashes on the bots:
https://build.webkit.org/builders/Apple%20MountainLion%20Debug%20WK1%20%28Tests%29/builds/17391
https://build.webkit.org/results/Apple%20MountainLion%20Debug%20WK1%20(Tests)/r178685%20(17391)/results.html

> Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
> Exception Codes: KERN_INVALID_ADDRESS at 0x00000000bbadbeef
> 
> Application Specific Information:
> CRASHING TEST: scrollbars/scrollbar-selectors.html
> 
> Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
> 0   WTFCrash + 42 (Assertions.cpp:321)
> 1   WebCore::RenderElement::willBeDestroyed() + 193 (RenderElement.cpp:1075)
> 2   WebCore::RenderBoxModelObject::willBeDestroyed() + 184 (RenderBoxModelObject.cpp:205)
> 3   WebCore::RenderBlockFlow::willBeDestroyed() + 414 (RenderBlockFlow.cpp:176)
> 4   WebCore::RenderObject::destroy() + 66 (RenderObject.cpp:2001)
> 5   WebCore::RenderObject::destroyAndCleanupAnonymousWrappers() + 274 (RenderObject.cpp:1989)
> 6   WebCore::Style::detachRenderTree(WebCore::Element&, WebCore::Style::DetachType) + 197 (StyleResolveTree.cpp:700)
> 7   WebCore::Style::detachRenderTree(WebCore::Element&) + 26 (StyleResolveTree.cpp:1001)
> 8   WebCore::destroyRenderTreeIfNeeded(WebCore::Node&) + 94 (ContainerNode.cpp:100)
> 9   WebCore::ContainerNode::removeBetween(WebCore::Node*, WebCore::Node*, WebCore::Node&) + 134 (ContainerNode.cpp:588)
> 10  WebCore::ContainerNode::removeChild(WebCore::Node*, int&) + 593 (ContainerNode.cpp:559)
> 11  WebCore::ContainerNode::replaceChild(WTF::PassRefPtr<WebCore::Node>, WebCore::Node*, int&) + 429 (ContainerNode.cpp:416)
> 12  WebCore::Element::setOuterHTML(WTF::String const&, int&) + 302 (Element.cpp:2072)
> 13  WebCore::setJSElementOuterHTML(JSC::ExecState*, JSC::JSObject*, long long, long long) + 315 (JSElement.cpp:2362)
> 14  JSC::callCustomSetter(JSC::ExecState*, JSC::JSValue, JSC::JSObject*, JSC::JSValue, JSC::JSValue) + 162 (CustomGetterSetter.cpp:45)
> 15  JSC::JSObject::put(JSC::JSCell*, JSC::ExecState*, JSC::PropertyName, JSC::JSValue, JSC::PutPropertySlot&) + 1648 (JSObject.cpp:383)
> ...

Should I rollout?

[WebKit Commit Bot]

Re-opened since this is blocked by bug 140657

[Csaba Osztrogonác]

Comment on attachment 221022 [details]
Patch

Cleared Antti Koivisto's review+ from obsolete attachment 221022 [details] so that this bug does not appear in http://webkit.org/pending-commit.