37303 2010-04-08 18:31:40 -0700 [Qt] Application crash on exit if NPPlugin is loaded 2010-07-01 00:55:18 -0700 1 1 1 Unclassified WebKit WebKit Qt 528+ (Nightly build) S60 Hardware S60 3rd edition CLOSED FIXED Qt P1 Critical --- 35784 1 david.leong abhinav.mithal abhinav.mithal commit-queue hausmann laszlo.gombos maheshk webkit.review.bot zalan oldest_to_newest 210527 0 52930 david.leong 2010-04-08 18:31:40 -0700 Created attachment 52930 fix to check for null pointer Qt-Symbian applications which use Qtwebkit and load Netscape plugins currently crashes on exit. The crash has been narrowed down to: void PluginView::platformDestroy() { QWebPageClient* client = m_parentFrame->view()->hostWindow()->platformPageClient(); if (qobject_cast<QGraphicsWebView*>(client->pluginParent())) // Crashes here delete static_cast<PluginContainerSymbian*>(platformPluginWidget())->proxy(); else delete platformPluginWidget(); } The crash is caused by a NULL client*. qobject_cast causes an exception as it requires a valid QObject pointer to access underlying Qtmetadata. 210544 1 52932 david.leong 2010-04-08 19:38:24 -0700 Created attachment 52932 Alternative patch The plugin view in symbian can only be of a type PluginContainerSymbian. The proxy object is initialized to NULL or a QGraphicsProxyWidget*. There is no harm deleting NULLs, so there is no need to do the qobject_cast. If the platform widget pointer is not null, it should be safe to delete both the proxy and the widget itself. 210546 2 webkit.review.bot 2010-04-08 19:39:23 -0700 Attachment 52932 did not pass style-queue: Failed to run "WebKitTools/Scripts/check-webkit-style" exit_code: 1 WebCore/plugins/symbian/PluginViewSymbian.cpp:417: Missing space before ( in if( [whitespace/parens] [5] Total errors found: 1 in 2 files If any of these errors are false positives, please file a bug against check-webkit-style. 210687 3 52932 hausmann 2010-04-09 05:07:41 -0700 Comment on attachment 52932 Alternative patch > + if( PlatformPluginWidget() ) { This is not going to compile because of the uppercase P. 210688 4 hausmann 2010-04-09 05:13:14 -0700 Committed r57333: <http://trac.webkit.org/changeset/57333> 210689 5 hausmann 2010-04-09 05:18:36 -0700 (In reply to comment #0) > Created an attachment (id=52930) [details] > fix to check for null pointer Cherry-picked r51006 into qtwebkit-4.6 with commit 14feb62c96ffe2c37e3e2fdac4e370fdbc76ef62 210711 6 hausmann 2010-04-09 07:16:37 -0700 Revision r57333 cherry-picked into qtwebkit-2.0 with commit e3b79791d73b624eceebbfbbfd6d6752a532b390 210826 7 david.leong 2010-04-09 11:40:22 -0700 (In reply to comment #3) > (From update of attachment 52932 [details]) > > > + if( PlatformPluginWidget() ) { > > This is not going to compile because of the uppercase P. Thanks! Good catch. Funny enough RVCT still compiles and works on the device. I think we are leaking the container now with the landed patch. Both the proxy and the container are new'ed but the if fix will only delete the proxy. This leaks the container. Will submit an updated fix once i test out a window'ed plugin to make sure it is working. 210985 8 53005 david.leong 2010-04-09 15:46:20 -0700 Created attachment 53005 Patch Updated alternative patch. It will now properly delete the proxy and the container objects. 211678 9 david.leong 2010-04-12 11:28:28 -0700 Tested the code with window'ed and windowless plugins. For window'ed plugins the current fix will leak the container. Updated the patch with Simon's comment for review. 211679 10 53005 david.leong 2010-04-12 11:29:52 -0700 Comment on attachment 53005 Patch Fixes memory leak. 211684 11 zalan 2010-04-12 11:35:54 -0700 changing on behalf of David 211752 12 53191 david.leong 2010-04-12 16:26:48 -0700 Created attachment 53191 SVN up'ed to latest webkit to fix auto check errors 211924 13 52930 hausmann 2010-04-13 06:50:17 -0700 Comment on attachment 52930 fix to check for null pointer Clearing review as this attachment has been landed 211926 14 hausmann 2010-04-13 06:53:15 -0700 As a side note: Due to the use of QGraphicsProxyWidget this is going to be horribly slow on Symbian and generally mobile platforms. Hopefully the flash plugin on the other side will default to windowless painting, otherwise this isn't going to be actually usable. 215272 15 53191 laszlo.gombos 2010-04-21 06:11:48 -0700 Comment on attachment 53191 SVN up'ed to latest webkit to fix auto check errors Marking it to cq+ for landing. 215631 16 53191 commit-queue 2010-04-21 18:30:10 -0700 Comment on attachment 53191 SVN up'ed to latest webkit to fix auto check errors Clearing flags on attachment: 53191 Committed r58035: <http://trac.webkit.org/changeset/58035> 215633 17 commit-queue 2010-04-21 18:30:17 -0700 All reviewed patches have been landed. Closing bug. 216959 18 hausmann 2010-04-26 03:17:10 -0700 Revision r58035 cherry-picked into qtwebkit-2.0 with commit 7513c8718ac700b5fa7f58cb459f76fadd526df3 244430 19 laszlo.gombos 2010-06-29 12:36:11 -0700 Reopening for a potential double-deallocation case when a page is destroyed which had a plugin loaded. It seems that the container is deleted twice, once with delete container->proxy(); and then by calling delete container. Abhinav promised to have a patch. 244612 20 laszlo.gombos 2010-06-29 20:47:34 -0700 Fix committed to trunk as http://trac.webkit.org/changeset/62159. We should seriously consider this patch for the 4.6 and 2.0 branches as well. 245085 21 maheshk 2010-06-30 21:35:21 -0700 *** Bug 41366 has been marked as a duplicate of this bug. *** 245167 22 hausmann 2010-07-01 00:48:12 -0700 <cherry-pick-for-backport: r62159> 245172 23 hausmann 2010-07-01 00:55:02 -0700 Revision r62159 cherry-picked into qtwebkit-2.0 with commit 5bddb0b27458a4ac655ca9527393b41a729d3717 52930 2010-04-08 18:31:40 -0700 2010-06-29 12:38:12 -0700 fix to check for null pointer crash.patch text/plain 1358 david.leong SW5kZXg6IFdlYkNvcmUvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIFdlYkNvcmUvQ2hhbmdlTG9n CShyZXZpc2lvbiA1NzMxMikKKysrIFdlYkNvcmUvQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBA IC0xLDMgKzEsMTYgQEAKKzIwMTAtMDQtMDggIERhdmlkIExlb25nICA8ZGF2aWQubGVvbmdAbm9r aWEuY29tPgorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAg IFN5bWJpYW4gYXBwcyBjcmFzaCBvbiBleGl0IGR1ZSB0byBhIGJhZCBxT2JqZWN0X2Nhc3QuCisg 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