Re: Debugging hints
Re: Debugging hints
- Subject: Re: Debugging hints
- From: Mike Abdullah <email@hidden>
- Date: Thu, 22 Dec 2011 13:39:24 +0000
Did you actually write this app to be dual-mode, or are you under the impression that turning off garbage collection will magically fix things?
Going by the stack trace, this is a classic zombie. Use Instruments to find the bug.
On 22 Dec 2011, at 10:48, Martin Hewitson wrote:
> Dear list,
>
> I have a very complex document based app. If I run the app compiled with garbage collection support, then I can open and close document windows without problems. With garbage collected disabled, opening and closing the document windows results in crashes. Clearly I have a memory management issue. My problem is that the crash report doesn't help me. Running in Xcode, the debugger drops out in NSApplicationMain with the following back trace:
>
> #0 0x00007fff91380398 in objc_msgSend_vtable14 ()
> No symbol table info available.
> #1 0x00007fff8ce33110 in CFRelease ()
> No symbol table info available.
> #2 0x00007fff8ce5b5f0 in -[__NSArrayM dealloc] ()
> No symbol table info available.
> #3 0x00007fff8bb06dd2 in -[NSObjectController _dealloc] ()
> No symbol table info available.
> #4 0x00007fff8b8fb6a4 in -[NSArrayController _dealloc] ()
> No symbol table info available.
> #5 0x00007fff8b9aa1bc in -[NSController dealloc] ()
> No symbol table info available.
> #6 0x00007fff8b8a34d5 in -[_NSBindingInfo dealloc] ()
> No symbol table info available.
> #7 0x00007fff8ce33110 in CFRelease ()
> No symbol table info available.
> #8 0x00007fff8ce5b5f0 in -[__NSArrayM dealloc] ()
> No symbol table info available.
> #9 0x00007fff8b838e7d in -[NSBinder _dealloc] ()
> No symbol table info available.
> #10 0x00007fff8b838e1e in -[NSBinder dealloc] ()
> No symbol table info available.
> #11 0x00007fff9138403c in (anonymous namespace)::AutoreleasePoolPage::pop ()
> No symbol table info available.
> #12 0x00007fff8ce5bf75 in _CFAutoreleasePoolPop ()
> No symbol table info available.
> #13 0x00007fff8ce634e4 in __CFRunLoopRun ()
> No symbol table info available.
> #14 0x00007fff8ce62ae6 in CFRunLoopRunSpecific ()
> No symbol table info available.
> #15 0x00007fff88bcd3d3 in RunCurrentEventLoopInMode ()
> No symbol table info available.
> #16 0x00007fff88bd463d in ReceiveNextEventCommon ()
> No symbol table info available.
> #17 0x00007fff88bd44ca in BlockUntilNextEventMatchingListInMode ()
> No symbol table info available.
> #18 0x00007fff8b6363f1 in _DPSNextEvent ()
> No symbol table info available.
> #19 0x00007fff8b635cf5 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] ()
> No symbol table info available.
> #20 0x00007fff8b63262d in -[NSApplication run] ()
> No symbol table info available.
> #21 0x00007fff8b8b180c in NSApplicationMain ()
>
>
> Can anyone offer any hints or suggestions as to how I can better go about finding this memory problem?
>
> (By the way, the reason I want to switch off the garbage collector is that I get intermittent crashes to do with the garbage collector queue; googling revealed that others have seen these crashes and the consensus seemed to be, switch off garbage collection. In any case, I don't like the fact that I can't switch off garbage collection due to what must be a bug somewhere.)
>
>
> Best wishes,
>
> Martin
>
>
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Martin Hewitson
> Albert-Einstein-Institut
> Max-Planck-Institut fuer
> Gravitationsphysik und Universitaet Hannover
> Callinstr. 38, 30167 Hannover, Germany
> Tel: +49-511-762-17121, Fax: +49-511-762-5861
> E-Mail: email@hidden
> WWW: http://www.aei.mpg.de/~hewitson
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
>
>
>
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