8739 2006-05-04 13:30:14 -0700 Crash in RenderTableSection::paint due to manipulating DOM on resize 2006-05-15 01:34:30 -0700 1 1 1 Unclassified WebKit DOM 420+ Mac OS X 10.4 RESOLVED FIXED http://dgl.cx/dump/2005/04/safari-crash.html or http://dgl.cx/dump/2006/05/safari-crash-on-load.html InRadar P1 Normal --- 1 dgl webkit-unassigned c.petersen87 darin mitz oldest_to_newest 41267 0 dgl 2006-05-04 13:30:14 -0700 See referenced URLs. Safari from 1.3 up to latest nightly webkit build crash on the above URLs which maniuplate the DOM on resize. This test case was developed from a real application. 41271 1 8113 mitz 2006-05-04 13:47:33 -0700 Created attachment 8113 Backtrace 42138 2 8272 mitz 2006-05-12 15:05:37 -0700 Created attachment 8272 Patch, including change log and manual test 42140 3 8272 eric 2006-05-12 15:21:29 -0700 Comment on attachment 8272 Patch, including change log and manual test Darin shoudl take a look at this. This is great news though! This is the same backtrace as our most common (yet non-reproducible) crasher! 42154 4 8272 darin 2006-05-12 20:51:38 -0700 Comment on attachment 8272 Patch, including change log and manual test I'm not sure this is the best fix. What code is relying on a layout having been done? Why doesn't that code trigger a layout if it's pending? An explicit layout here seems to just cover over the real problem. 42159 5 mitz 2006-05-13 01:02:35 -0700 (In reply to comment #4) > IWhat code is relying on a layout having been > done? The painting code is invoked by -[WebHTMLView _recursiveDisplayAllDirtyWithLockFocus:visRect:] after it calls -[WebHTMLView _web_layoutIfNeededRecursive:testDirtyRect:]. > Why doesn't that code trigger a layout if it's pending? Calling _web_layoutIfNeededRecursive:testDirtyRect: is doing just that. > An explicit > layout here seems to just cover over the real problem. I think "the real problem" here is that there is a method that promises to do layout but fails to deliver. That method is -[WebHTMLView layoutToMinimumPageWidth:maximumPageWidth:adjustingViewSize:], and the proposed patch ensures that it will always do what it says it does. 42162 6 hyatt 2006-05-13 01:45:04 -0700 layoutToMinimumPageWidth calls layout though (through the forceLayout functions). Then it sends the resize event (which may schedule another layout). I guess I need a better understanding of why forceLayout didn't deliver. 42164 7 mitz 2006-05-13 01:53:03 -0700 (In reply to comment #6) > layoutToMinimumPageWidth calls layout though (through the forceLayout > functions). Then it sends the resize event (which may schedule another > layout). I guess I need a better understanding of why forceLayout didn't > deliver. As you said, it schedules another layout, but that doesn't happen until it's too late, since _recursiveDisplayAllDirtyWithLockFocus:visRect proceeds with painting right after it asks for layout. I really don't see what the mystery is :-\ 42165 8 mitz 2006-05-13 01:55:38 -0700 Perhaps I should clarify that the objects that don't have layout are those added by the resize event handler. 42166 9 hyatt 2006-05-13 01:59:01 -0700 Ah, ok, yes, that was the clarification I needed. With your patch, though, we do one layout, resize, and then do another layout. Couldn't we do the resize check at the top of the function, and then just let the remaining code do the single layout? 42169 10 mitz 2006-05-13 03:25:30 -0700 (In reply to comment #9) > With your patch, though, we do one layout, resize, and then do another layout. > Couldn't we do the resize check at the top of the function, and then just let > the remaining code do the single layout? So we talked about this on IRC. It's true that this fix add a layout, but only in the resize-handler-that-manupulates-the-DOM case. If you want to do just one layout, you need to go deep into Frame::forceLayoutWithPageWidthRange and separate it into a function that sets the width and marks as needing layout (which you will call into before sending the resize event) and a function that forces layout (possibly twice for printing?) (which you will call into after sending the resize event). I'm not sure it's worth it. 42196 11 8272 darin 2006-05-13 08:46:41 -0700 Comment on attachment 8272 Patch, including change log and manual test OK. With the new explanation I think this is an acceptable way to fix the bug. The change log is not good, though. prepare-ChangeLog used the wrong class name! 42335 12 darin 2006-05-14 21:32:56 -0700 Committed revision 14371. 42354 13 eric 2006-05-15 01:34:30 -0700 I'm hopeful this fixed: <rdar://problem/4018768> unrepro but oft-reported Safari crash in khtml::RenderTableSection::paint 8113 2006-05-04 13:47:33 -0700 2006-05-04 13:47:33 -0700 Backtrace 8739 backtrace.txt text/plain 5822 mitz MCAgIGNvbS5hcHBsZS5XZWJDb3JlICAgICAgICAJMHgwMWEwYTBjYyBXZWJDb3JlOjpSZW5kZXJU YWJsZVNlY3Rpb246OnBhaW50KFdlYkNvcmU6OlJlbmRlck9iamVjdDo6UGFpbnRJbmZvJiwgaW50 LCBpbnQpICsgMzA4IChSZW5kZXJUYWJsZVNlY3Rpb24uY3BwOjYzMCkKMSAgIGNvbS5hcHBsZS5X ZWJDb3JlICAgICAgICAJMHgwMWEwODA0YyBXZWJDb3JlOjpSZW5kZXJUYWJsZTo6cGFpbnQoV2Vi Q29yZTo6UmVuZGVyT2JqZWN0OjpQYWludEluZm8mLCBpbnQsIGludCkgKyAxMDA0IChSZW5kZXJU YWJsZS5jcHA6Mzk4KQoyICAgY29tLmFwcGxlLldlYkNvcmUgICAgICAgIAkweDAxOTdiNTEwIFdl YkNvcmU6OlJlbmRlckJsb2NrOjpwYWludENoaWxkcmVuKFdlYkNvcmU6OlJlbmRlck9iamVjdDo6 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