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Re: Zombies don't get enabled
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Re: Zombies don't get enabled


  • Subject: Re: Zombies don't get enabled
  • From: "Giovanni Donelli" <email@hidden>
  • Date: Thu, 5 Jul 2007 21:28:18 +0200

I was using 5... because the venerable Aaron Hillegass said so in
http://www.mactech.com/articles/mactech/Vol.21/21.04/DebuggingBugs/index.html

Anyway I have now set CFZombieLevel to 65553 and the app crashes.

However the stack is contains only:
0 objc_msgSend

That's all, not very usable. Any idea on how having a better backtrace?

Thanks,
Giovanni


On 7/5/07, Sean McBride <email@hidden> wrote:

On 7/5/07 7:49 PM, Giovanni Donelli said:

>Dear Folks,    I am debugging my app that has some sporadic crashes. it
>sounded like a good idea to use Zombies to track the double release of an
>object.
>
>I look at different tutorials but I haven't figured out how to enable
>zombies in xcode...
>
>I pretty much followed what this tutorial said:
>http://www.mactech.com/articles/mactech/Vol.21/21.04/Debuggi
ngBugs/index.html
>
>- I enabled NSZombieEnabled = YES, in the xcode's executable target, and
>also set CFZombieLevel = 5

Why 5?

>Still don't get Zombies exceptions when I run this:
>
>
>
>@implementation Controller
>
>
>- (void)awakeFromNib
>
>{
>
>    NSLog(@"Zombies = %s", getenv("NSZombieEnabled") ); // I verified
this
>is set to YES
>
>     NSMutableString *string = [[NSMutableString alloc] initWithString:
>@"ciao"];
>
>    [string release];
>
>     NSMutableString *anotherString = [NSMutableString
stringWithFormat:@"I'm
>new!"];
>
>    NSLog(@"string = %@", string);

Being toll-free-bridged, NSZombie does not help with NSString.  You need
CFZombie, and 5 is not the value you want.  See:
<http://developer.apple.com/technotes/tn2004/tn2124.html#SECCF>


-- ____________________________________________________________ Sean McBride, B. Eng email@hidden Rogue Research www.rogue-research.com Mac Software Developer Montréal, Québec, Canada



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  • Follow-Ups:
    • Re: Zombies don't get enabled
      • From: "Timothy J. Wood" <email@hidden>
References: 
 >Zombies don't get enabled (From: "Giovanni Donelli" <email@hidden>)
 >Re: Zombies don't get enabled (From: "Sean McBride" <email@hidden>)

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