Re: Tracking down a Zombie

FROM : Adam R. Maxwell
DATE : Fri Aug 11 22:42:16 2006

On Aug 11, 2006, at 13:31, Kenneth Wieschhoff wrote:

> I've done a fair amount of reading and searching for a solution for 
> this and various solutions I've tried haven't yielded any results.
>
> Given the following stack crawl:
>
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_INVALID_ADDRESS at address: 0x084b730a
> 0x907bbdb8 in CFRelease ()
> (gdb) bt
> #0  0x907bbdb8 in CFRelease ()
> #1  0x907d2300 in __CFDictionaryDeallocate ()
> #2  0x907bbf34 in _CFRelease ()
> #3  0x907bbf34 in _CFRelease ()
>
>
> I assume I'm double releasing something but turning on the NSZombie 
> debugging code hasn't yielded any good results.
>
> Is there a how-to on tracking this down?


You could try CFZombieLevel = 65553.  I see occasional crashes in the 
system frameworks when using this, though.  Apple has a tech note on 
debugging <http://developer.apple.com/technotes/tn2004/tn2124.html> 
that's referenced in this thread <http://www.cocoabuilder.com/archive/
message/cocoa/2006/7/12/167390>.

-- Adam