On 1/14/09 2:33 PM, Greg Parker said: >On Jan 14, 2009, at 11:18 AM, Jeff Johnson wrote: >> On Jan 14, 2009, at 1:04 PM, John Nairn wrote: >>> I occasionally get difficult-to-debug crashes where that last thing >>> in the crash log is a message being sent, which ends up being a >>> message sent to an object that has been released (I think it is >>> objc_msg, but I am not looking at a crash log now). These happen >>> much more often in Leopard than in Tiger. >>> >>> Since I have many messages going to many objects, it can take me a >>> long time to track these problems down (in one case several weeks). >>> I am fairly certain it is not a notification message because I also >>> remove objects as observers before they are deallocated. Is there a >>> debugging tool that can provide more information about what message >>> was sent to what object at the time of the crash? >> >> See the following for a good tutorial: >> >> http://www.sealiesoftware.com/blog/archive/2008/09/22/ >objc_explain_So_you_crashed_in_objc_msgSend.html > >That will help you extract info from the crash log itself.
Not to hijack this thread, but... anyone know what objc_msgSend_fixup is? Recently I've seen a lot of these types of crashes in my (64bit, GC) app. Thread 0 Crashed: 0 libobjc.A.dylib 0x00007fff809bbcf2 _objc_fixupMessageRef + 39 1 libobjc.A.dylib 0x00007fff809bdc7f objc_msgSend_fixup + 119 2 com.apple.CoreFoundation 0x00007fff82b798b7 __CFMachPortPerform + 119 3 com.apple.CoreFoundation 0x00007fff82b9b3ac CFRunLoopRunSpecific + 3516 4 com.apple.HIToolbox 0x00007fff80548da2 RunCurrentEventLoopInMode + 278 5 com.apple.HIToolbox 0x00007fff80548bd8 ReceiveNextEventCommon + 322 6 com.apple.HIToolbox 0x00007fff80548a83 BlockUntilNextEventMatchingListInMode + 79 7 com.apple.AppKit 0x00007fff80da93b0 _DPSNextEvent + 603 8 com.apple.AppKit 0x00007fff80da8cf1 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 136 9 com.apple.AppKit 0x00007fff80da2a84 -[NSApplication run] + 455 10 com.apple.AppKit 0x00007fff80d6f83c NSApplicationMain + 373 -- ____________________________________________________________ Sean McBride, B. Eng s...@rogue-research.com Rogue Research www.rogue-research.com Mac Software Developer Montréal, Québec, Canada _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
