58239 2011-04-11 09:04:10 -0700 REGRESSION (WebKit2): Deadlock clicking Flash plugin 2011-04-11 14:27:57 -0700 1 1 1 Unclassified WebKit Plug-ins 528+ (Nightly build) PC Windows 7 RESOLVED FIXED http://frostyschristmastreefarm.com/ InRadar, PlatformOnly, Regression P2 Normal --- 53211 1 aroben webkit-unassigned andersca jhoneycutt webkit.review.bot oldest_to_newest 383195 0 aroben 2011-04-11 09:04:10 -0700 To reproduce: 1. Go to http://frostyschristmastreefarm.com/ 2. Click on the "PB" icon in the Flash audio player near the top of the page The UI process and web process deadlock. 383196 1 aroben 2011-04-11 09:04:23 -0700 <rdar://problem/8769302> 383197 2 aroben 2011-04-11 09:05:03 -0700 See bug 51351 comment 0 for a description of how the deadlock occurs. 383199 3 aroben 2011-04-11 09:08:27 -0700 As described in bug 51351 comment 4, we're planning to fix this by making the web process spin a run loop when waiting for a reply to any synchronous message. Bug 51351 and bug 51352 represent future improvements which would allow us to only spin a run loop in certain situations (and thus hopefully reduce chances of bugs due to reentrancy issues). 383223 4 aroben 2011-04-11 09:45:23 -0700 I'm currently hoping that we can get away with only dispatching messages to web process windows that are descendants of UI process windows. And hopefully we can get away with only dispatching sent (as opposed to posted) messages. 383225 5 aroben 2011-04-11 09:46:51 -0700 It looks like that is too restrictive. It causes deadlocks when going to cuteoverload.com and clicking on the "YouTube" button in a video. It looks like Flash creates some top-level windows, even for windowless plugins. Maybe we need to process messages for them, too. 383231 6 aroben 2011-04-11 09:56:18 -0700 Delivering sent messages to top-level windows in the web process seems to fix the cuteoverload.com deadlock. (We are not delivering messages to the RunLoop window, which is good.) 383471 7 89076 aroben 2011-04-11 13:52:42 -0700 Created attachment 89076 Dispatch sent messages to windows owned by the web process when waiting a sync CoreIPC reply 383479 8 webkit.review.bot 2011-04-11 13:54:43 -0700 Attachment 89076 did not pass style-queue: Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebCore/page/PageGroup.cpp', u'Sour..." exit_code: 1 Source/WebKit2/Platform/RunLoop.h:47: Code inside a namespace should not be indented. [whitespace/indent] [4] Total errors found: 1 in 13 files If any of these errors are false positives, please file a bug against check-webkit-style. 383480 9 89076 aroben 2011-04-11 13:55:14 -0700 Comment on attachment 89076 Dispatch sent messages to windows owned by the web process when waiting a sync CoreIPC reply Whoa, the WebCore parts of this patch should not be there! 383481 10 89079 aroben 2011-04-11 13:55:51 -0700 Created attachment 89079 Dispatch sent messages to windows owned by the web process when waiting a sync CoreIPC reply 383490 11 webkit.review.bot 2011-04-11 13:58:57 -0700 Attachment 89079 did not pass style-queue: Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebKit2/ChangeLog', u'Source/WebKit..." exit_code: 1 Source/WebKit2/Platform/RunLoop.h:47: Code inside a namespace should not be indented. [whitespace/indent] [4] Total errors found: 1 in 11 files If any of these errors are false positives, please file a bug against check-webkit-style. 383496 12 89079 andersca 2011-04-11 14:03:51 -0700 Comment on attachment 89079 Dispatch sent messages to windows owned by the web process when waiting a sync CoreIPC reply View in context: https://bugs.webkit.org/attachment.cgi?id=89079&action=review > Source/WebKit2/Platform/CoreIPC/Connection.cpp:56 > + bool waitWhileDispatchingSentMessages(double absoluteTime, const Vector<HWND>& windowsToReceiveMessages) This should be made more clear that it's window messages that are being dispatched. 383512 13 89079 aroben 2011-04-11 14:16:21 -0700 Comment on attachment 89079 Dispatch sent messages to windows owned by the web process when waiting a sync CoreIPC reply View in context: https://bugs.webkit.org/attachment.cgi?id=89079&action=review >> Source/WebKit2/Platform/CoreIPC/Connection.cpp:56 >> + bool waitWhileDispatchingSentMessages(double absoluteTime, const Vector<HWND>& windowsToReceiveMessages) > > This should be made more clear that it's window messages that are being dispatched. Renamed to waitWhileDispatchingSentWin32Messages. 383519 14 aroben 2011-04-11 14:26:49 -0700 Committed r83498: <http://trac.webkit.org/changeset/83498> 383523 15 aroben 2011-04-11 14:27:25 -0700 *** Bug 53211 has been marked as a duplicate of this bug. *** 383525 16 aroben 2011-04-11 14:27:57 -0700 *** Bug 53209 has been marked as a duplicate of this bug. *** 89076 2011-04-11 13:52:42 -0700 2011-04-11 13:55:47 -0700 Dispatch sent messages to windows owned by the web process when waiting a sync CoreIPC reply bug-58239-20110411165240.patch text/plain 18209 aroben U3VidmVyc2lvbiBSZXZpc2lvbjogODM0MzYKZGlmZiAtLWdpdCBhL1NvdXJjZS9XZWJDb3JlL3Bh Z2UvUGFnZUdyb3VwLmNwcCBiL1NvdXJjZS9XZWJDb3JlL3BhZ2UvUGFnZUdyb3VwLmNwcAppbmRl eCAzMjY4MWY4N2VlMjgyNTc2NDAzZjRlYzg4NjRkNzNlY2Y3OGIxMzhlLi5jNTNmNzcxMmU1MzQy MjE1ZDgwNmYzYTQwNGIzMDZlMGMyNjQ0YTkyIDEwMDY0NAotLS0gYS9Tb3VyY2UvV2ViQ29yZS9w YWdlL1BhZ2VHcm91cC5jcHAKKysrIGIvU291cmNlL1dlYkNvcmUvcGFnZS9QYWdlR3JvdXAuY3Bw 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