These might also be helpful: http://www.cocoadev.com/index.pl?DebuggingTechniques (in particular see the "Breaking on Exceptions" section where they talk about objc_exception_throw) http://chanson.livejournal.com/171198.html
Then, when you crash, bring up the Debugger (Cmd-Shift-Y). Sometimes you'll be able to go back a few steps into the method/line# in your code that caused the crash. On 2009-11-10, at 11:21 AM, Jens Alfke wrote: > > On Nov 10, 2009, at 5:37 AM, Ian Piper wrote: > >> Can anyone advise a good strategy for tracking down EXC_BAD_ACCESS crashes? >> I have an application that I can run quite happily two out of three times. >> Then it will crash with this error. By this I mean I can do Build and Run >> successively with no problems and then it will crash - no code or other >> changes. > > That exception just means the CPU dereferenced a pointer to an invalid memory > address; your average garden-variety crash. If you have earlier experience > debugging native code on any other platform, it'll come in handy. Run with > the debugger enabled and look at the backtrace when you crash. Find out what > variable contains the bad pointer. > > If the crash is within the function objc_msgsend, what's happened is that > something's called a method of an invalid (probably freed) object. There's a > whole FAQ somewhere on this, titled something like "So, You've Crashed In > objc_msgsend!". > > —Jens_______________________________________________ > > 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/hzc.lists%40gmail.com > > This email sent to hzc.li...@gmail.com _______________________________________________ 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
