我看到我的iPod应用程序中几乎没有随机崩溃，所有崩溃报告中都有以下消息（尽管它们有不同的线程跟踪）。崩溃是不可重现的 - 它是随机发生的。
尝试取消引用垃圾指针
我还附上了一份样本崩溃报告。请建议如何调试此类问题。
崩溃报告：
CrashReporter Key：6e6f41fdb678cf746d1c4561b2d7bc2b3f6772ad 硬件型号：iPod4,1 过程：TestApplication [3154] 路径：/var/mobile/Applications/E5ED253B-A27A-4014-885A-030D19C7CB2C/TestApplication.app/TestApplication 标识符：com.domain.retail.TestApplication 版本：1.0.0 代码类型：ARM 父流程：launchd [1]
Date/Time: 2013-04-02 10:37:29.000 +0530
OS Version: iPhone OS 6.1.3 (10B329)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000cc
Crashed Thread: 10
Thread 0 name: Dispatch queue: com.domain.main-thread
Thread 0:
0 libsystem_kernel.dylib 0x3a7bceb4 mach_msg_trap + 20
1 CoreFoundation 0x32626040 0x3258f000 + 618560
2 CoreFoundation 0x32624d58 0x3258f000 + 613720
3 CoreFoundation 0x32597eb8 CFRunLoopRunSpecific + 352
4 CoreFoundation 0x32597d48 CFRunLoopRunInMode + 104
5 GraphicsServices 0x3614a2e8 GSEventRunModal + 72
6 UIKit 0x344ad300 UIApplicationMain + 1120
7 TestApplication 0x000a54d0 main + 44
Thread 1 name: Dispatch queue: com.domain.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x3a7bd648 kevent64 + 24
1 libdispatch.dylib 0x3a6e8df8 0x3a6e5000 + 15864
Thread 2 name: WebThread
Thread 2:
0 libsystem_kernel.dylib 0x3a7bceb4 mach_msg_trap + 20
1 CoreFoundation 0x32626040 0x3258f000 + 618560
2 CoreFoundation 0x32624da0 0x3258f000 + 613792
3 CoreFoundation 0x32597eb8 CFRunLoopRunSpecific + 352
4 CoreFoundation 0x32597d48 CFRunLoopRunInMode + 104
5 WebCore 0x38585500 0x3857b000 + 42240
6 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 3:
0 libsystem_kernel.dylib 0x3a7cd6a4 __semwait_signal + 24
1 Foundation 0x32f0ac60 0x32eb7000 + 343136
2 TestApplication 0x0031c9c0 -[KSCrashDeadlockMonitor runMonitor] + 244
3 Foundation 0x32f67e80 0x32eb7000 + 724608
4 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 4 name: KSCrash Exception Handler (Secondary)
Thread 4:
0 libsystem_kernel.dylib 0x3a7bceb4 mach_msg_trap + 20
1 TestApplication 0x00318b50 ksmachexc_i_handleExceptions + 124
2 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 5 name: KSCrash Exception Handler (Primary)
Thread 5:
Thread 6 name: com.domain.NSURLConnectionLoader
Thread 6:
0 libsystem_kernel.dylib 0x3a7bceb4 mach_msg_trap + 20
1 CoreFoundation 0x32626040 0x3258f000 + 618560
2 CoreFoundation 0x32624da0 0x3258f000 + 613792
3 CoreFoundation 0x32597eb8 CFRunLoopRunSpecific + 352
4 CoreFoundation 0x32597d48 CFRunLoopRunInMode + 104
5 Foundation 0x32ee43d0 0x32eb7000 + 185296
6 Foundation 0x32f67e80 0x32eb7000 + 724608
7 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 7 name: com.domain.CFSocket.private
Thread 7:
0 libsystem_kernel.dylib 0x3a7cd594 select$DARWIN_EXTSN + 20
1 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 8 name: JavaScriptCore::BlockFree
Thread 8:
0 libsystem_kernel.dylib 0x3a7cd08c __psynch_cvwait + 24
1 libsystem_c.dylib 0x3a71eaa0 pthread_cond_timedwait + 40
2 JavaScriptCore 0x36540c70 _ZN3WTF15ThreadCondition9timedWaitERNS_5MutexEd + 104
3 JavaScriptCore 0x36652550 0x364e5000 + 1496400
4 JavaScriptCore 0x36664fa8 0x364e5000 + 1572776
5 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 9:
0 libsystem_kernel.dylib 0x3a7cdd98 __workq_kernreturn + 8
1 libsystem_c.dylib 0x3a71ba10 0x3a715000 + 27152
Thread 10 name: Dispatch queue: com.domain.root.high-priority
Thread 10 Crashed:
0 libicucore.A.dylib 0x39e5e570 ucol_getVersion + 0
1 TextInput 0x37d741b0 _ZN2KB8WordTrie4loadERKNS_6StringE + 280
2 TextInput 0x37d6d698 0x37d35000 + 231064
3 TextInput 0x380de2f8 0x37d35000 + 3838712
4 TextInput 0x380de298 0x37d35000 + 3838616
5 TextInput 0x37d65170 _ZN14TIInputManager17load_dictionariesERKN2KB6StringES3_b + 20
6 TextInput 0x37d761c8 0x37d35000 + 266696
7 TextInput 0x37d75e08 0x37d35000 + 265736
8 UIKit 0x3454ffd0 0x34456000 + 1023952
9 UIKit 0x3454f018 0x34456000 + 1019928
10 UIKit 0x3454ec28 0x34456000 + 1018920
11 UIKit 0x3454d500 0x34456000 + 1012992
12 UIKit 0x3454d1f0 0x34456000 + 1012208
13 UIKit 0x345afa48 0x34456000 + 1415752
14 UIKit 0x345ac918 0x34456000 + 1403160
15 UIKit 0x345ac618 0x34456000 + 1402392
16 UIKit 0x345ab018 0x34456000 + 1396760
17 UIKit 0x345aae40 0x34456000 + 1396288
18 UIKit 0x345aa780 0x34456000 + 1394560
19 TestApplication 0x00155e90 -[TestApplicationRequestInfoController showScanAlertForErrorType:Barcode:] + 2380
20 TestApplication 0x00151c48 -[TestApplicationRequestInfoController showAlertForErrorType:Barcode:] + 72
21 TestApplication 0x001fe090 -[TestApplicationBOPISOrdersScanningController processFirstNonSerialNumberScan:] + 3788
22 TestApplication 0x0020dd38 -[TestApplicationScanController processScanInfo] + 3512
23 TestApplication 0x0020cf38 __39-[TestApplicationScanController startScanThread]_block_invoke + 44
24 libdispatch.dylib 0x3a6e7118 0x3a6e5000 + 8472
25 libdispatch.dylib 0x3a6f5258 0x3a6e5000 + 66136
26 libdispatch.dylib 0x3a6f53b8 0x3a6e5000 + 66488
27 libsystem_c.dylib 0x3a71ba10 0x3a715000 + 27152
Thread 11:
0 libsystem_kernel.dylib 0x3a7bceb4 mach_msg_trap + 20
1 CoreFoundation 0x32626040 0x3258f000 + 618560
2 CoreFoundation 0x32624da0 0x3258f000 + 613792
3 CoreFoundation 0x32597eb8 CFRunLoopRunSpecific + 352
4 CoreFoundation 0x32597d48 CFRunLoopRunInMode + 104
5 Foundation 0x32ebaf90 0x32eb7000 + 16272
6 Foundation 0x32ec3d50 0x32eb7000 + 52560
7 TestApplication 0x002cc288 -[CommStream runLoopThread:] + 704
8 Foundation 0x32f67e80 0x32eb7000 + 724608
9 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 12:
0 libsystem_kernel.dylib 0x3a7cd594 select$DARWIN_EXTSN + 20
1 Foundation 0x32f67e80 0x32eb7000 + 724608
2 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 13:
0 libsystem_kernel.dylib 0x3a7bceb4 mach_msg_trap + 20
1 CoreFoundation 0x32626040 0x3258f000 + 618560
2 CoreFoundation 0x32624da0 0x3258f000 + 613792
3 CoreFoundation 0x32597eb8 CFRunLoopRunSpecific + 352
4 CoreFoundation 0x32597d48 CFRunLoopRunInMode + 104
5 Foundation 0x32ebaf90 0x32eb7000 + 16272
6 Foundation 0x32ec3d50 0x32eb7000 + 52560
7 TestApplication 0x002cc288 -[CommStream runLoopThread:] + 704
8 Foundation 0x32f67e80 0x32eb7000 + 724608
9 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 14:
0 libsystem_kernel.dylib 0x3a7cd594 select$DARWIN_EXTSN + 20
1 Foundation 0x32f67e80 0x32eb7000 + 724608
2 libsystem_c.dylib 0x3a726310 0x3a715000 + 70416
Thread 15:
0 libsystem_kernel.dylib 0x3a7cdd98 __workq_kernreturn + 8
1 libsystem_c.dylib 0x3a71ba10 0x3a715000 + 27152
Thread 10 crashed with ARM Thread State:
r0: 0x00000000 r1: 0x05fe1320 r2: 0x00000001 r3: 0x00000001
r4: 0x03000000 r5: 0x07000000 r6: 0x05a1c000 r7: 0x05fe1394
r8: 0x05fe14d8 r9: 0x00000000 r10: 0x37d5f865 r11: 0x05fe14c8
ip: 0x3be8e2bc sp: 0x05fe1300 lr: 0x37d74427 pc: 0x39e5e570
cpsr: 0x20000030
CrashDoctor Diagnosis: Attempted to dereference garbage pointer 0xcc.
Originated at or in a subcall of -[TestApplicationRequestInfoController showScanAlertForErrorType:Barcode:]
答案 0 :(得分：1)
看一下主题10：
其中一个功能可能存在问题：
19 TestApplication 0x00155e90 -[TestApplicationRequestInfoController showScanAlertForErrorType:Barcode:] + 2380
20 TestApplication 0x00151c48 -[TestApplicationRequestInfoController showAlertForErrorType:Barcode:] + 72
21 TestApplication 0x001fe090 -[TestApplicationBOPISOrdersScanningController processFirstNonSerialNumberScan:] + 3788
22 TestApplication 0x0020dd38 -[TestApplicationScanController processScanInfo] + 3512
23 TestApplication 0x0020cf38 __39-[TestApplicationScanController startScanThread]_block_invoke + 44
仔细检查它们。或者在它们上面放置断点并重新运行程序，看看当程序通过这些函数时会发生什么。
希望这有帮助...只是一个初学者......
请记住，没有随机崩溃..这些崩溃是由于代码中的错误造成的。