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POHow to understand crash log on XCode 4
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  1. POHow to understand crash log on XCode 4
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    copied!<p>I am trying to debug the cause of my app to crash. From my trial I realized that somewhere, there were leaks and I am in the middle of figuring out. I knew it because when I tried debugging using this method <a href="http://www.friday.com/bbum/2010/10/17/when-is-a-leak-not-a-leak-using-heapshot-analysis-to-find-undesirable-memory-growth/" rel="nofollow">here</a>, it will crash eventually as it seems the memory leaks bulking up after some time.</p> <p>To find out the caused, I have now open the NSZombieEnabled to YES on XCode 4. But I didn't see anything. So now I turn to crash log. And here it is :</p> <pre><code>Thread 7 Crashed: 0 libsystem_kernel.dylib 0x31b71a1c __pthread_kill + 8 1 libsystem_c.dylib 0x35ceb3b4 pthread_kill + 52 2 libsystem_c.dylib 0x35ce3bf8 abort + 72 3 libsystem_c.dylib 0x35d1f024 free + 104 4 ImageIO 0x32ca35f0 ImageProviderReleaseInfoCallback + 56 5 CoreGraphics 0x31a05284 image_provider_finalize + 8 6 CoreFoundation 0x35aad288 _CFRelease + 160 7 CoreFoundation 0x35aad1ae CFRelease + 82 8 CoreGraphics 0x319fe150 CGImageProviderRelease + 4 9 CoreGraphics 0x31a00bac CGImageBlockSetRelease + 44 10 CoreGraphics 0x31a00b70 img_blocks_destroy + 8 11 CoreGraphics 0x319fdaae CGSImageDataUnlock + 26 12 libRIP.A.dylib 0x309eebae ripc_ReleaseImage + 374 13 libRIP.A.dylib 0x309ecc9c ripc_DrawImage + 536 14 CoreGraphics 0x319f9284 CGContextDelegateDrawImage + 44 15 CoreGraphics 0x319f9142 CGContextDrawImage + 250 16 myapp 0x000c6a28 0x45000 + 530984 17 myapp 0x000c6d6a 0x45000 + 531818 18 myapp 0x000c681c 0x45000 + 530460 19 myapp 0x000c3526 0x45000 + 517414 20 myapp 0x000c3796 0x45000 + 518038 21 Foundation 0x33486382 -[NSThread main] + 38 22 Foundation 0x334f85c6 __NSThread__main__ + 966 23 libsystem_c.dylib 0x35ceb30a _pthread_start + 242 24 libsystem_c.dylib 0x35cecbb4 thread_start + 0 </code></pre> <p>My question : is there any tips on how to read and understand this debug log? Maybe a link or book that cover how to debug all together. Thanks.</p>
 

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