Question

我有点卡住了，需要解决这个问题，因为我的一个应用程序出现了随机崩溃，无法永远复制。这是崩溃日志之一：

Incident Identifier: 59865612-9F00-44EA-9474-2BF607AD662E
CrashReporter Key:   bea17b7f4237e78a13ce60449d694621d0f16a44
Hardware Model:      iPhone2,1
Process:         APPNAME [82]
Path:            /var/mobile/Applications/ACE9A1A2-F1BE-43E0-9775-1291723D4C4A/APPNAME.app/APPNAME
Identifier:      APPNAME
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2011-05-21 19:10:27.893 +0100
OS Version:      iPhone OS 4.3.3 (8J2)
Report Version:  104

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00000009
Crashed Thread:  0

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libobjc.A.dylib                 0x33b24c98 objc_msgSend + 16
1   Foundation                      0x344507b4 __NSFireTimer + 112
2   CoreFoundation                  0x3039ca40 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 8
3   CoreFoundation                  0x3039eec4 __CFRunLoopDoTimer + 844
4   CoreFoundation                  0x3039f83e __CFRunLoopRun + 1082
5   CoreFoundation                  0x3032febc CFRunLoopRunSpecific + 224
6   CoreFoundation                  0x3032fdc4 CFRunLoopRunInMode + 52
7   GraphicsServices                0x3448e418 0x3448a000 + 17432
8   GraphicsServices                0x3448e4c4 0x3448a000 + 17604
9   UIKit                           0x33f3cd62 -[UIApplication _run] + 398
10  UIKit                           0x33f3a800 UIApplicationMain + 664
11  APPNAME                         0x00002d88 0x1000 + 7560
12  APPNAME                         0x00002d3c 0x1000 + 7484

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0   libsystem_kernel.dylib          0x36100fbc kevent + 24
1   libdispatch.dylib               0x33d0b032 _dispatch_mgr_invoke + 706
2   libdispatch.dylib               0x33d0c03a _dispatch_queue_invoke + 86
3   libdispatch.dylib               0x33d0b5ea _dispatch_worker_thread2 + 186
4   libsystem_c.dylib               0x33e0a58a _pthread_wqthread + 258
5   libsystem_c.dylib               0x33e0abbc start_wqthread + 0

Thread 2 name:  WebThread
Thread 2:
0   libsystem_kernel.dylib          0x360fdc00 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x360fd758 mach_msg + 44
2   CoreFoundation                  0x3039d2b8 __CFRunLoopServiceMachPort + 88
3   CoreFoundation                  0x3039f562 __CFRunLoopRun + 350
4   CoreFoundation                  0x3032febc CFRunLoopRunSpecific + 224
5   CoreFoundation                  0x3032fdc4 CFRunLoopRunInMode + 52
6   WebCore                         0x34c2627e RunWebThread(void*) + 382
7   libsystem_c.dylib               0x33e0930a _pthread_start + 242
8   libsystem_c.dylib               0x33e0abb4 thread_start + 0

Thread 3:
0   libsystem_kernel.dylib          0x360fdc00 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x360fd758 mach_msg + 44
2   CoreFoundation                  0x3039d2b8 __CFRunLoopServiceMachPort + 88
3   CoreFoundation                  0x3039f562 __CFRunLoopRun + 350
4   CoreFoundation                  0x3032febc CFRunLoopRunSpecific + 224
5   CoreFoundation                  0x3032fdc4 CFRunLoopRunInMode + 52
6   Foundation                      0x343ea7f6 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 206
7   Foundation                      0x343dd382 -[NSThread main] + 38
8   Foundation                      0x3444f5c6 __NSThread__main__ + 966
9   libsystem_c.dylib               0x33e0930a _pthread_start + 242
10  libsystem_c.dylib               0x33e0abb4 thread_start + 0

Thread 4 name:  com.apple.CFSocket.private
Thread 4:
0   libsystem_kernel.dylib          0x360ffc60 __select + 20
1   CoreFoundation                  0x303a28f2 __CFSocketManager + 582
2   libsystem_c.dylib               0x33e0930a _pthread_start + 242
3   libsystem_c.dylib               0x33e0abb4 thread_start + 0

Thread 5:
0   libsystem_kernel.dylib          0x361003ec __workq_kernreturn + 8
1   libsystem_c.dylib               0x33e0a6d8 _pthread_wqthread + 592
2   libsystem_c.dylib               0x33e0abbc start_wqthread + 0

Thread 6:
0   libsystem_kernel.dylib          0x361003ec __workq_kernreturn + 8
1   libsystem_c.dylib               0x33e0a6d8 _pthread_wqthread + 592
2   libsystem_c.dylib               0x33e0abbc start_wqthread + 0

Thread 7:
0   libsystem_kernel.dylib          0x361003ec __workq_kernreturn + 8
1   libsystem_c.dylib               0x33e0a6d8 _pthread_wqthread + 592
2   libsystem_c.dylib               0x33e0abbc start_wqthread + 0

Thread 8:
0   libsystem_kernel.dylib          0x361003ec __workq_kernreturn + 8
1   libsystem_c.dylib               0x33e0a6d8 _pthread_wqthread + 592
2   libsystem_c.dylib               0x33e0abbc start_wqthread + 0

Thread 0 crashed with ARM Thread State:
r0: 0x04246810    r1: 0x33738814      r2: 0x042b3704      r3: 0x00000000
r4: 0x00000001    r5: 0x00000001      r6: 0x00259330      r7: 0x2fdfeb30
r8: 0x002593d0    r9: 0x00000000     r10: 0x04241720     r11: 0x00000000
ip: 0x3fa3f4e8    sp: 0x2fdfea60      lr: 0x349077bb      pc: 0x33dfcc98
  cpsr: 0x280f0030

有人可以就可能的原因提出建议吗？

谢谢！

Answer 1

看起来你有一个计时器触发并尝试向已经被释放的对象发送消息。

Answer 2

Keyline在这里是：Exception Type: EXC_BAD_ACCESS (SIGBUS)

当您尝试访问之前已发布的对象时，会发生这种情况。因为，您试图访问计时器回调中的对象，所以可能发生的事情是，当计时器响应对象时，相关对象已被释放。

您可以启用NSZombie environment variable。

来跟踪对象

Answer 3

当您创建NSTimer时，如果要调用的对象消失，请务必保留ref然后使其无效。像这样：

[self.bugZapTimer invalidate];
self.bugZapTimer = [NSTimer timerWithTimeInterval: 0.1
                                           target: self
                                         selector: @selector(bugZapTimer:)
                                         userInfo: NULL
                                          repeats: FALSE];
[[NSRunLoop currentRunLoop] addTimer:self.bugZapTimer forMode: NSDefaultRunLoopMode];

然后，在你的dealloc方法中你必须这样做：

[self.bugZapTimer invalidate];
self.bugZapTimer = nil;

是什么导致了这个iPhone崩溃日志？

3 个答案: