Re: Debugging: do CFZombieLevel and objc_exception_throw() work for you?

FROM : Chris Suter
DATE : Tue Jul 11 23:07:03 2006

On 12/07/2006, at 5:55 AM, Scott Ellsworth wrote:

> I tried the same thing with an NSString, and with CFZombieLevel (1, 
> 19, 5, and a few other values based on the tech note), and all I 
> got were bad access exceptions.


Just thought I'd point out that I think the numbers you used don't 
look quite right. The tech. note doesn't define what 5 would do; the 
table in the note uses bit numbers. From my understanding of the 
note, you'll get a crash for most settings of CFZombieLevel except 
for 8 (never free memory used to hold CF objects) and under certain 
circumstances 2 (when scribbling deallocated CF memory, don't 
scirbble object  header (CFRuntimeBase)). I guess you'll get similar 
results to NSZombieEnabled by setting CFZombieLevel to 9 (although 
obviously you'll get a crash rather than an exception thrown, but 
that's just as good).

- Chris