奇怪的堆栈跟踪多次发生神秘的崩溃

Question

我在应用商店上线了这个应用，在 10 天内我遇到了超过 6000 次崩溃！我可以在 HockeyApp 上看到的堆栈跟踪非常神秘，根据 iOS 版本（5 或 6），我还获得了 2 个不同的堆栈跟踪，但我很确定它们都是相同的崩溃。 你怎么看待这件事？我应该在哪里寻找虫子？不用说我无法重现它。

iOS 6

Thread 0 Crashed:
0   libobjc.A.dylib                     0x3ae395d0 _objc_msgSend + 16
1   Foundation                          0x338bc4a1 __NSThreadPerformPerform + 461
2   CoreFoundation                      0x32f798f7 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
3   CoreFoundation                      0x32f791f3 __CFRunLoopDoSources0 + 363
4   CoreFoundation                      0x32f77f2f __CFRunLoopRun + 647
5   CoreFoundation                      0x32eeb23d _CFRunLoopRunSpecific + 357
6   CoreFoundation                      0x32eeb0c9 _CFRunLoopRunInMode + 105
7   GraphicsServices                    0x36aa633b _GSEventRunModal + 75
8   UIKit                               0x34e072b9 _UIApplicationMain + 1121
9   <REDACTED>                        0x00055943 main (main.m:16)

Exception Type:  SIGSEGV
Exception Codes: SEGV_ACCERR at 0x736f7477
Crashed Thread:  0

iOS 5：

Thread 0 Crashed:
0   libobjc.A.dylib                     0x338c8f78 _objc_msgSend + 16
1   CoreFoundation                      0x35c091fb -[NSObject performSelector:withObject:] + 43
2   Foundation                          0x350d9747 ___NSThreadPerformPerform + 351
3   CoreFoundation                      0x35c7ead3 ___CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
4   CoreFoundation                      0x35c7e335 ___CFRunLoopDoSources0 + 365
5   CoreFoundation                      0x35c7d045 ___CFRunLoopRun + 653
6   CoreFoundation                      0x35c004a5 _CFRunLoopRunSpecific + 301
7   CoreFoundation                      0x35c0036d _CFRunLoopRunInMode + 105
8   GraphicsServices                    0x3399b439 _GSEventRunModal + 137
9   UIKit                               0x333d8cd5 _UIApplicationMain + 1081
10  <REDACTED>                        0x0003f32b main (main.m:16)

Exception Type:  SIGSEGV
Exception Codes: SEGV_ACCERR at 0xf10d9e21
Crashed Thread:  0

我已经检查了对 performSelector:withObject: 的每个调用，我看不到任何无法识别的选择器被调用。错误在哪里？

更新 ** 还包括来自后台线程的堆栈跟踪

Thread 1:
0   libsystem_kernel.dylib              0x3568a3a8 _kevent + 24
1   libdispatch.dylib                   0x339bdbc9 __dispatch_mgr_wakeup + 1

Thread 2:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 3:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 4:
0   libsystem_kernel.dylib              0x3569a0d8 ___psynch_mutexwait + 24
1   WebCore                             0x3721d4ef __ZL17_WebTryThreadLockb + 215
2   WebCore                             0x3721d7f3 __ZL14WebRunLoopLockP19__CFRunLoopObservermPv + 31
3   CoreFoundation                      0x355f8b1b ___CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 19
4   CoreFoundation                      0x355f6d57 ___CFRunLoopDoObservers + 259
5   CoreFoundation                      0x355f701f ___CFRunLoopRun + 615
6   CoreFoundation                      0x3557a4a5 _CFRunLoopRunSpecific + 301
7   CoreFoundation                      0x3557a36d _CFRunLoopRunInMode + 105
8   WebCore                             0x372c0ca3 __ZL12RunWebThreadPv + 403
9   libsystem_c.dylib                   0x34843735 __pthread_start + 321

Thread 5:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 6:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 7:
0   libsystem_kernel.dylib              0x3568a004 _mach_msg_trap + 20
1   CoreFoundation                      0x355f83f3 ___CFRunLoopServiceMachPort + 127
2   CoreFoundation                      0x355f712b ___CFRunLoopRun + 883
3   CoreFoundation                      0x3557a4a5 _CFRunLoopRunSpecific + 301
4   CoreFoundation                      0x3557a36d _CFRunLoopRunInMode + 105
5   Foundation                          0x349bfbb9 +[NSURLConnection(Loader) _resourceLoadLoop:] + 309
6   Foundation                          0x349bfa81 -[NSThread main] + 73
7   Foundation                          0x34a53591 ___NSThread__main__ + 1049
8   libsystem_c.dylib                   0x34843735 __pthread_start + 321

Thread 8:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 9:
0   libsystem_kernel.dylib              0x3569a570 ___select + 20
1   libsystem_c.dylib                   0x34843735 __pthread_start + 321

Thread 10:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 11:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 12:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 13:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 14:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 15:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 16:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 17:
0   libsystem_kernel.dylib              0x3569acd4 ___workq_kernreturn + 8

Thread 0 crashed with ARM Thread State:
    r0: 0x10910cc0     r1: 0x322194f6     r2: 0x00482a7a     r3: 0x00000000 
    r4: 0xf10a6823     r5: 0x00481a7a     r6: 0x33102823     r7: 0x2fef2e54 
    r8: 0x00482a7a     r9: 0x0c88653d    r10: 0x3efac9b4    r11: 0x00000000 
    ip: 0x004a710c     sp: 0x2fef2e38     lr: 0x00315cf3     pc: 0x33242f78 
  cpsr: 0x20080030 

谢谢

已编辑：感谢 DDPerformDebugger.m，我终于解决了 崩溃是由客户提供的第三方框架引起的。 谢谢大家

Answer 1

您的应用中似乎存在内存和线程问题。应用正在尝试向已释放的对象发送消息（方法）。

两个堆栈跟踪都暗示了线程的使用。看起来您正在后台线程中做一些工作，然后向不再存在的对象（在主线程上？）发送消息。因此，检查后台线程的堆栈跟踪并查看它们在做什么可能会有所帮助。