25055 2009-04-06 01:15:54 -0700 Maximum sized canvas hangs/crashes Safari 2014-04-04 01:17:05 -0700 1 1 1 Unclassified WebKit Canvas 528+ (Nightly build) Mac OS X 10.5 RESOLVED WORKSFORME P1 Normal --- 1 eric webkit-unassigned krit mbelshe mdelaney7 oldest_to_newest 116585 0 eric 2009-04-06 01:15:54 -0700 Maximum sized canvas hangs/crashes Safari I was trying to create a test case for bug 23212 and in doing so, I ended up finding a related bug in our handling of large canvas sizes. When running the attached test case, the following in spewed to the console: Mon Apr 6 01:05:51 DumpRenderTree[2296] <Error>: CGBitmapContextCreateImage: failed to allocate 1073741824 bytes. Mon Apr 6 01:05:51 DumpRenderTree[2296] <Error>: CGImageCreate: invalid image provider: NULL. Mon Apr 6 01:05:51 DumpRenderTree[2296] <Error>: CGImageSourceGetStatusAtIndex image source parameter is nil Mon Apr 6 01:05:51 DumpRenderTree[2296] <Error>: CGImageSourceGetStatusAtIndex image source parameter is nil Mostly from under the BitmapImage::paint() method call. Safari then hangs at 100% CPU (indefinitely, as far as I can tell) under: 940 -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] 940 -[NSView _drawRect:clip:] 940 -[NSScroller drawRect:] 940 -[NSScroller drawKnobSlotInRect:highlight:] 940 -[NSScroller _old_drawKnobSlotInRect:highlight:] 940 Draw3PartImage 940 _NSTileImageWithOperation 940 NSRectFillUsingOperation 940 CGContextFillRect 940 CGContextFillRects 940 ripc_DrawRects 940 ripc_Render 940 ripc_GetColor 940 ripl_Create 940 __spin_lock 940 __spin_lock Probably CG has just been made unhappy at that point. ;) P1 because this seems to be a reproducible hang/crash. 116586 1 29270 eric 2009-04-06 01:18:01 -0700 Created attachment 29270 hang report 116587 2 29271 eric 2009-04-06 01:19:02 -0700 Created attachment 29271 max-canvas-size test, which causes hang 29270 2009-04-06 01:18:01 -0700 2009-04-06 01:18:01 -0700 hang report HangReport.txt text/plain 6259 eric 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