35798 2010-03-05 10:48:10 -0800 Crash due to infinite recursion when viewing composited video on Windows 2010-03-05 13:05:41 -0800 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) PC All RESOLVED FIXED InRadar P2 Normal --- 1 cmarrin cmarrin simon.fraser webkit.review.bot oldest_to_newest 196547 0 cmarrin 2010-03-05 10:48:10 -0800 Playing any video on Windows with HW compositing enabled will crash due to infinite recursion. Here's the top of the stack: WebKit.dll!WebCore::MediaPlayerPrivate::notifySyncRequired(const WebCore::GraphicsLayer * __formal=0x0b955bd0) Line 866 + 0xb bytes C++ WebKit.dll!WebCore::GraphicsLayerCACF::notifySyncRequired() Line 94 + 0x31 bytes C++ WebKit.dll!WebCore::MediaPlayerPrivate::notifySyncRequired(const WebCore::GraphicsLayer * __formal=0x0b955bd0) Line 869 C++ WebKit.dll!WebCore::GraphicsLayerCACF::notifySyncRequired() Line 94 + 0x31 bytes C++ WebKit.dll!WebCore::MediaPlayerPrivate::notifySyncRequired(const WebCore::GraphicsLayer * __formal=0x0b955bd0) Line 869 C++ Proposed solution: 1. Make WKCACFLayer be a base class, with a virtual drawInContext() method 2. Subclass WKCACFLayer for GraphicsLayer (equivalent of WebLayer) 3. Subclass WKCACFLayer for the root, to allow the root layer to communicate with the WKCACFLayerRenderer. 4. Eliminate the notifySyncRequired callbacks. 196572 1 50109 cmarrin 2010-03-05 11:59:28 -0800 Created attachment 50109 Patch 196573 2 webkit.review.bot 2010-03-05 12:01:28 -0800 Attachment 50109 did not pass style-queue: Failed to run "WebKitTools/Scripts/check-webkit-style" exit_code: 1 WebCore/platform/graphics/win/GraphicsLayerCACF.cpp:120: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] [3] Total errors found: 1 in 13 files If any of these errors are false positives, please file a bug against check-webkit-style. 196574 3 50109 simon.fraser 2010-03-05 12:10:30 -0800 Comment on attachment 50109 Patch > Index: WebCore/platform/graphics/win/GraphicsLayerCACF.cpp > =================================================================== > +class WebLayer : public WKCACFLayer { > +private: > + GraphicsLayerCACF* m_owner; > +}; Could WebLayer get away with having pointer to the base class (GraphicsLayer?). No point making it too incestuous with GraphicsLayerCACF if you can avoid it. This this a great improvement to these classes! 196585 4 simon.fraser 2010-03-05 12:35:38 -0800 <rdar://problem/7706319> 196603 5 cmarrin 2010-03-05 13:05:41 -0800 Fixed in http://trac.webkit.org/changeset/55592 50109 2010-03-05 11:59:28 -0800 2010-03-05 12:10:30 -0800 Patch 35798.patch text/plain 26151 cmarrin SW5kZXg6IFdlYkNvcmUvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIFdlYkNvcmUvQ2hhbmdlTG9n CShyZXZpc2lvbiA1NTU5MSkKKysrIFdlYkNvcmUvQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBA IC0xLDMgKzEsNjMgQEAKKzIwMTAtMDMtMDUgIENocmlzIE1hcnJpbiAgPGNtYXJyaW5AYXBwbGUu Y29tPgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIEZp eGVkIGluZmluaXRlIHJlY3Vyc2lvbiBvZiBjb21wb3NpdGVkIHZpZGVvIG9uIFdpbmRvd3MKKyAg ICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTM1Nzk4CisgICAg ICAgIAorICAgICAgICBEdWUgdG8gYSBjaGFuZ2UgaW4gdGhlIHdheSB3ZSBnZXQgdGhlIHBsYXRm 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