我的 Mac OS X 应用程序随机崩溃，并且没有迹象表明我的代码中有错误。如何调试此类错误？我无法访问随机崩溃的用户计算机。
以下是崩溃日志的示例：
OS Version: Mac OS X 10.8 (12A269)
Report Version: 10
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000008fe00000
VM Regions Near 0x8fe00000:
MALLOC_SMALL 0000000082000000-0000000083800000 [ 24.0M] rw-/rwx SM=PRV
__TEXT 000000008fe05000-000000008fe38000 [ 204K] r-x/rwx SM=COW /usr/lib/dyld
Application Specific Information:
objc_msgSend() selector name: _absorbDeferredNeedsDisplayRegion
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libobjc.A.dylib 0x994d3c0b objc_msgSend + 27
1 com.apple.AppKit 0x9502985f -[_NSDisplayOperationStack exitDisplayOperationForWindow:] + 602
2 com.apple.AppKit 0x95181f8b -[NSView(NSLayerKitGlue) _drawViewBackingLayer:inContext:drawingHandler:] + 2523
3 com.apple.AppKit 0x951814fe -[NSView(NSLayerKitGlue) drawLayer:inContext:] + 167
4 com.apple.QuartzCore 0x91fe2b6a -[CALayer drawInContext:] + 136
5 com.apple.QuartzCore 0x920e0b5f backing_callback(CGContext*, void*) + 88
6 com.apple.QuartzCore 0x91fe1bbd CABackingStoreUpdate_ + 3241
7 com.apple.QuartzCore 0x91fe0943 CA::Layer::display_() + 1369
8 com.apple.QuartzCore 0x91fe03e4 -[CALayer _display] + 20
9 com.apple.QuartzCore 0x91fe03c5 CA::Layer::display() + 221
10 com.apple.QuartzCore 0x91fe02e3 -[CALayer display] + 20
11 com.apple.QuartzCore 0x91fe020b CA::Layer::display_if_needed(CA::Transaction*) + 673
12 com.apple.QuartzCore 0x91fdfa84 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 38
13 com.apple.QuartzCore 0x91fd4cfa CA::Context::commit_transaction(CA::Transaction*) + 338
14 com.apple.QuartzCore 0x91fd4a70 CA::Transaction::commit() + 362
15 com.apple.QuartzCore 0x91fd487d CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 67
16 com.apple.CoreFoundation 0x98c7b51e __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
17 com.apple.CoreFoundation 0x98c7b45d __CFRunLoopDoObservers + 381
18 com.apple.CoreFoundation 0x98c54d85 CFRunLoopRunSpecific + 405
19 com.apple.CoreFoundation 0x98c54bdb CFRunLoopRunInMode + 123
20 com.apple.HIToolbox 0x9a0ef8aa RunCurrentEventLoopInMode + 242
21 com.apple.HIToolbox 0x9a0ef619 ReceiveNextEventCommon + 374
22 com.apple.HIToolbox 0x9a0ef494 BlockUntilNextEventMatchingListInMode + 88
23 com.apple.AppKit 0x94fefa5a _DPSNextEvent + 724
24 com.apple.AppKit 0x94fef28c -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 119
25 com.apple.AppKit 0x94fe56dc -[NSApplication run] + 855
26 com.apple.AppKit 0x94f888e6 NSApplicationMain + 1053
Thread 1:: Dispatch queue: com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x95af69ae kevent + 10
1 libdispatch.dylib 0x94e00cc5 _dispatch_mgr_invoke + 993
2 libdispatch.dylib 0x94e007fd _dispatch_mgr_thread + 53
Thread 2:: com.apple.CFSocket.private
0 libsystem_kernel.dylib 0x95af5be6 __select + 10
1 com.apple.CoreFoundation 0x98c99320 __CFSocketManager + 1632
2 libsystem_c.dylib 0x9918b557 _pthread_start + 344
3 libsystem_c.dylib 0x99175cee thread_start + 34
Thread 3:
0 libsystem_kernel.dylib 0x95af37d2 mach_msg_trap + 10
1 libsystem_kernel.dylib 0x95af2cb0 mach_msg + 68
2 com.apple.CoreFoundation 0x98c4fcc9 __CFRunLoopServiceMachPort + 185
3 com.apple.CoreFoundation 0x98c556af __CFRunLoopRun + 1247
4 com.apple.CoreFoundation 0x98c54d6a CFRunLoopRunSpecific + 378
5 com.apple.CoreFoundation 0x98c54bdb CFRunLoopRunInMode + 123
6 com.apple.Foundation 0x97b2ca86 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 278
7 com.apple.Foundation 0x97abe8f0 -[NSRunLoop(NSRunLoop) run] + 76
8 [cut by author] 0x003de1dd +[HTTPServer bonjourThread] + 173
9 com.apple.Foundation 0x97b27318 -[NSThread main] + 45
10 com.apple.Foundation 0x97b2729b __NSThread__main__ + 1396
11 libsystem_c.dylib 0x9918b557 _pthread_start + 344
12 libsystem_c.dylib 0x99175cee thread_start + 34
Thread 4:: com.apple.NSURLConnectionLoader
0 libsystem_kernel.dylib 0x95af37d2 mach_msg_trap + 10
1 libsystem_kernel.dylib 0x95af2cb0 mach_msg + 68
2 com.apple.CoreFoundation 0x98c4fcc9 __CFRunLoopServiceMachPort + 185
3 com.apple.CoreFoundation 0x98c556af __CFRunLoopRun + 1247
4 com.apple.CoreFoundation 0x98c54d6a CFRunLoopRunSpecific + 378
5 com.apple.CoreFoundation 0x98c54bdb CFRunLoopRunInMode + 123
6 com.apple.Foundation 0x97ac329a +[NSURLConnection(Loader) _resourceLoadLoop:] + 395
7 com.apple.Foundation 0x97b27318 -[NSThread main] + 45
8 com.apple.Foundation 0x97b2729b __NSThread__main__ + 1396
9 libsystem_c.dylib 0x9918b557 _pthread_start + 344
10 libsystem_c.dylib 0x99175cee thread_start + 34
Thread 5:
0 libsystem_kernel.dylib 0x95af60ee __workq_kernreturn + 10
1 libsystem_c.dylib 0x9918e04c _pthread_workq_return + 45
2 libsystem_c.dylib 0x9918de19 _pthread_wqthread + 448
3 libsystem_c.dylib 0x99175cca start_wqthread + 30
Thread 6:
0 libsystem_kernel.dylib 0x95af60ee __workq_kernreturn + 10
1 libsystem_c.dylib 0x9918e04c _pthread_workq_return + 45
2 libsystem_c.dylib 0x9918de19 _pthread_wqthread + 448
3 libsystem_c.dylib 0x99175cca start_wqthread + 30
Thread 7:
0 libsystem_kernel.dylib 0x95af60ee __workq_kernreturn + 10
1 libsystem_c.dylib 0x9918e04c _pthread_workq_return + 45
2 libsystem_c.dylib 0x9918de19 _pthread_wqthread + 448
3 libsystem_c.dylib 0x99175cca start_wqthread + 30
Thread 8:
0 libsystem_kernel.dylib 0x95af60ee __workq_kernreturn + 10
1 libsystem_c.dylib 0x9918e04c _pthread_workq_return + 45
2 libsystem_c.dylib 0x9918de19 _pthread_wqthread + 448
3 libsystem_c.dylib 0x99175cca start_wqthread + 30
Thread 9:
0 libsystem_kernel.dylib 0x95af60ee __workq_kernreturn + 10
1 libsystem_c.dylib 0x9918e04c _pthread_workq_return + 45
2 libsystem_c.dylib 0x9918de19 _pthread_wqthread + 448
3 libsystem_c.dylib 0x99175cca start_wqthread + 30
Thread 10:
0 libsystem_kernel.dylib 0x95af60ee __workq_kernreturn + 10
1 libsystem_c.dylib 0x9918e04c _pthread_workq_return + 45
2 libsystem_c.dylib 0x9918de19 _pthread_wqthread + 448
3 libsystem_c.dylib 0x99175cca start_wqthread + 30
Thread 11:
0 libsystem_kernel.dylib 0x95af60ee __workq_kernreturn + 10
1 libsystem_c.dylib 0x9918e04c _pthread_workq_return + 45
2 libsystem_c.dylib 0x9918de19 _pthread_wqthread + 448
3 libsystem_c.dylib 0x99175cca start_wqthread + 30
Thread 0 crashed with X86 Thread State (32-bit):
eax: 0x818950b0 ebx: 0xac76a5d8 ecx: 0x9592966f edx: 0x90000000
edi: 0x8fe00000 esi: 0x00000000 ebp: 0xbfff8c88 esp: 0xbfff8c54
ss: 0x00000023 efl: 0x00010282 eip: 0x994d3c0b cs: 0x0000001b
ds: 0x00000023 es: 0x00000023 fs: 0x00000000 gs: 0x0000000f
cr2: 0x8fe00000
Logical CPU: 2