On Oct 22, 2008, at 1:15 PM, John Zorko wrote:
I've found a few leaks in my app using Instruments, and it works well, but i've this message that appears in the console window when I run the app under XCode, and i'm not sure how to find the cause:2008-10-22 13:06:57.998 Magnatune[1956:dc23] *** _NSAutoreleaseNoPool(): Object 0x17d6f0 of class NSCFData autoreleased with no pool in place - just leaking Stack: (0x306d242b 0x3066f2c7 0x3066f293 0x3067d159 0x3067cfbf 0x3067cf9d 0x3e21 0x306abbd3 0x306714fd 0x306ea311 0x10a59 0x3486e530 0x347e6bac 0x34881920 0x30269cb9 0x30269367 0x3486c7d0 0x34870d38 0x34825880 0x3144a825)... I think it might have something to do with my Core Audio code, as this only happens once I start playing audio, but again, i'm not sure how to use the information supplied in the message to determine where the leak is in the code. Can anyone illuminate me?
One of two reasons, most likely:(1) You have done something in main() before passing control to the AppKit (NSApplicationMain()) and without creating an autorelease pool.
(2) You are doing something in a thread that does not have a runloop and have not created an autorelease pool.
I'm betting (2). In particular, if you have a Core Audio callback being triggered in a secondary thread and you are using Objective-C in that callback, there may not be a pool in place.
Do this in your callback:
{
NSAutoreleasePool *p = [[NSAutoreleasePool alloc] init];
... do your callback thing here ...
[p drain];
return ... whatever you need to return ...;
b.bum
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