218576 2020-11-04 11:20:29 -0800 Debug assertion in RenderTreeUpdater::GeneratedContent::updateQuotesUpTo 2021-04-07 07:48:06 -0700 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 rniwa rbuis bfulgham cgarcia changseok emilio esprehn+autocc ews-feeder ews-watchlist glenn koivisto kondapallykalyan pdr product-security rbuis rwlbuis simon.fraser svillar webkit-bug-importer zalan oldest_to_newest 1704528 0 rniwa 2020-11-04 11:20:29 -0800 e.g. ./rendering/updating/RenderTreeUpdaterGeneratedContent.cpp(69) : void WebCore::RenderTreeUpdater::GeneratedContent::updateQuotesUpTo(WebCore::RenderQuote *) 1 0x32cc632a9 WTFCrash 2 0x30e461b8b WTFCrashWithInfo(int, char const*, char const*, int) 3 0x312d57b17 WebCore::RenderTreeUpdater::GeneratedContent::updateQuotesUpTo(WebCore::RenderQuote*) 4 0x312d55f97 WebCore::RenderTreeUpdater::GeneratedContent::updatePseudoElement(WebCore::Element&, WTF::Optional<WebCore::Style::ElementUpdate> const&, WebCore::PseudoId) 5 0x312d559df WebCore::RenderTreeUpdater::updateAfterDescendants(WebCore::Element&, WebCore::Style::ElementUpdates const*) 6 0x312d55970 WebCore::RenderTreeUpdater::popParent() 7 0x312d54f00 WebCore::RenderTreeUpdater::popParentsToDepth(unsigned int) 8 0x312d54c58 WebCore::RenderTreeUpdater::updateRenderTree(WebCore::ContainerNode&) 9 0x312d543e3 WebCore::RenderTreeUpdater::commit(std::__1::unique_ptr<WebCore::Style::Update const, std::__1::default_delete<WebCore::Style::Update const> >) 10 0x31137af3d WebCore::Document::updateRenderTree(std::__1::unique_ptr<WebCore::Style::Update const, std::__1::default_delete<WebCore::Style::Update const> >) 11 0x31137b4ad WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType) 12 0x31137be40 WebCore::Document::updateStyleIfNeeded() 13 0x311382afb WebCore::Document::implicitClose() 14 0x311f4039b WebCore::FrameLoader::checkCallImplicitClose() 15 0x311f3fdfa WebCore::FrameLoader::checkCompleted() 16 0x311f3e1a7 WebCore::FrameLoader::finishedParsing() 17 0x311396e36 WebCore::Document::finishedParsing() 18 0x311abf9c8 WebCore::HTMLConstructionSite::finishedParsing() 19 0x311b054e7 WebCore::HTMLTreeBuilder::finished() 20 0x311ac6e68 WebCore::HTMLDocumentParser::end() 21 0x311ac4cd8 WebCore::HTMLDocumentParser::attemptToRunDeferredScriptsAndEnd() 22 0x311ac4a07 WebCore::HTMLDocumentParser::prepareToStopParsing() 23 0x311ac6ed2 WebCore::HTMLDocumentParser::attemptToEnd() 24 0x311ac6fa9 WebCore::HTMLDocumentParser::finish() 25 0x311ed9b82 WebCore::DocumentWriter::end() 26 0x311ed8b84 WebCore::DocumentLoader::finishedLoading() 27 0x311ed8581 WebCore::DocumentLoader::notifyFinished(WebCore::CachedResource&, WebCore::NetworkLoadMetrics const&) 28 0x31204c54a WebCore::CachedResource::checkNotify(WebCore::NetworkLoadMetrics const&) 29 0x3120480bc WebCore::CachedResource::finishLoading(WebCore::SharedBuffer*, WebCore::NetworkLoadMetrics const&) 30 0x3120495ac WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*, WebCore::NetworkLoadMetrics const&) 31 0x311fcfc44 WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) <rdar://problem/69565848> 1704531 1 413188 rniwa 2020-11-04 11:23:40 -0800 Created attachment 413188 Reduced test case 1705187 2 413417 rbuis 2020-11-06 03:51:40 -0800 Created attachment 413417 Patch 1705256 3 413417 koivisto 2020-11-06 08:41:11 -0800 Comment on attachment 413417 Patch Please include the test case. 1705495 4 rniwa 2020-11-06 19:47:29 -0800 There is no security implication here? If so, we should move this to non-security component and add a test. 1705520 5 koivisto 2020-11-06 22:35:18 -0800 No, I don't think there are security implications here. 1705526 6 rniwa 2020-11-07 00:00:52 -0800 Can we also add a test in that case? 1711348 7 rbuis 2020-12-02 09:01:34 -0800 I am not sure anymore the fix is correct, will look again soon. 1711932 8 rniwa 2020-12-03 19:16:48 -0800 (In reply to Rob Buis from comment #7) > I am not sure anymore the fix is correct, will look again soon. Ok. 1715883 9 rniwa 2020-12-18 20:01:19 -0800 (In reply to Rob Buis from comment #7) > I am not sure anymore the fix is correct, will look again soon. Any update on this? 1745284 10 rbuis 2021-03-30 13:43:03 -0700 (In reply to Ryosuke Niwa from comment #9) > (In reply to Rob Buis from comment #7) > > I am not sure anymore the fix is correct, will look again soon. > > Any update on this? Sorry for the delay! I finally found the root cause, when hitting splitDepth >= cMaxSplitDepth in RenderTreeBuilder::Inline::splitInlines, the tree re-ordering will ruin the existing RenderQuote order, making m_previousUpdatedQuote ordered *after* lastQuote. Possible solutions: - remove the ASSERT. - keep patch as-is. - clear m_previousUpdatedQuote if splitDepth >= cMaxSplitDepth is hit. - still update the RenderQuote if not found when starting looking from m_previousUpdatedQuote. I am not very familiar with the splitting, continuations or quote's though, thoughts? 1746011 11 424893 rbuis 2021-04-01 07:01:10 -0700 Created attachment 424893 Patch 1746457 12 425007 rbuis 2021-04-02 05:01:23 -0700 Created attachment 425007 Patch 1746719 13 425007 rniwa 2021-04-02 16:11:54 -0700 Comment on attachment 425007 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=425007&action=review > Source/WebCore/rendering/updating/RenderTreeUpdaterGeneratedContent.cpp:56 > + if (m_updater.m_builder.maxSplitDepthOccured()) { > + m_previousUpdatedQuote = nullptr; > + updateQuotesUpTo(nullptr); > + } else { > + updateQuotesUpTo(nullptr); > + m_previousUpdatedQuote = nullptr; Why are we re-ordering these? > Source/WebCore/rendering/updating/RenderTreeUpdaterGeneratedContent.cpp:173 > - if (m_updater.renderView().hasQuotesNeedingUpdate()) { > + if (m_updater.renderView().hasQuotesNeedingUpdate() && !m_updater.m_builder.maxSplitDepthOccured()) { What is this check out? 1747159 14 425007 zalan 2021-04-05 16:38:40 -0700 Comment on attachment 425007 Patch In this invalid state when the continuation link is broken pretty much all bets are off. Since we don't have a fully expressed tree (gap in the descendants) it's something that's hard to recover from (also this is a pathological case) I would just do something like this: diff --git a/Source/WebCore/rendering/updating/RenderTreeBuilder.h b/Source/WebCore/rendering/updating/RenderTreeBuilder.h index 34906eeaa60f..4da422c1b2d4 100644 --- a/Source/WebCore/rendering/updating/RenderTreeBuilder.h +++ b/Source/WebCore/rendering/updating/RenderTreeBuilder.h @@ -62,6 +62,8 @@ public: void createPlaceholderForFullScreen(RenderFullScreen&, std::unique_ptr<RenderStyle>, const LayoutRect&); #endif + bool hasBrokenContinuation() const { return m_hasBrokenContinuation; } + private: void attachInternal(RenderElement& parent, RenderPtr<RenderObject>, RenderObject* beforeChild); @@ -92,6 +94,8 @@ private: void reportVisuallyNonEmptyContent(const RenderElement& parent, const RenderObject& child); + void setHasBrokenContinuation() { m_hasBrokenContinuation = true; } + class FirstLetter; class List; class MultiColumn; @@ -150,6 +154,7 @@ private: #if ENABLE(FULLSCREEN_API) std::unique_ptr<FullScreen> m_fullScreenBuilder; #endif + bool m_hasBrokenContinuation { false }; }; } diff --git a/Source/WebCore/rendering/updating/RenderTreeBuilderInline.cpp b/Source/WebCore/rendering/updating/RenderTreeBuilderInline.cpp index 9ff8247a2bf8..35de076cb970 100644 --- a/Source/WebCore/rendering/updating/RenderTreeBuilderInline.cpp +++ b/Source/WebCore/rendering/updating/RenderTreeBuilderInline.cpp @@ -352,7 +352,8 @@ void RenderTreeBuilder::Inline::splitInlines(RenderInline& parent, RenderBlock* sibling->setNeedsLayoutAndPrefWidthsRecalc(); sibling = next; } - } + } else + m_builder.setHasBrokenContinuation(); // Keep walking up the chain. currentChild = current; diff --git a/Source/WebCore/rendering/updating/RenderTreeUpdaterGeneratedContent.cpp b/Source/WebCore/rendering/updating/RenderTreeUpdaterGeneratedContent.cpp index 62e7e2c77b2b..19b34a4726c9 100644 --- a/Source/WebCore/rendering/updating/RenderTreeUpdaterGeneratedContent.cpp +++ b/Source/WebCore/rendering/updating/RenderTreeUpdaterGeneratedContent.cpp @@ -66,7 +66,7 @@ void RenderTreeUpdater::GeneratedContent::updateQuotesUpTo(RenderQuote* lastQuot if (&quote == lastQuote) return; } - ASSERT(!lastQuote); + ASSERT(!lastQuote || m_updater.m_builder.hasBrokenContinuation()); } static bool elementIsTargetedByKeyframeEffectRequiringPseudoElement(const Element* element, PseudoId pseudoId) 1747490 15 425294 rbuis 2021-04-06 10:08:40 -0700 Created attachment 425294 Patch 1747545 16 425294 zalan 2021-04-06 11:32:16 -0700 Comment on attachment 425294 Patch Could you include a test case, please? 1747848 17 425382 rbuis 2021-04-07 04:37:37 -0700 Created attachment 425382 Patch 1747878 18 ews-feeder 2021-04-07 07:48:02 -0700 Committed r275606: <https://commits.webkit.org/r275606> All reviewed patches have been landed. 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