如何解决EXEC_BAD_ACCESS（SIGSEGV）上的KERN_INVALID_ADDRESS（SIGSEGV）

Question

在我的Mac OSX雪豹和xcode 4.1和最后一个SDK上，我的应用程序崩溃在手机上，但是在我的手机上，它不会崩溃。

我得到这个错误，我启动我的应用程序，等待RSS饲料和2/3秒后坠毁： 谢谢您的帮助....

Date/Time:  2011-10-07 10:15:54.675 +0200 
OS Version:  iPhone OS 4.3.3 (8J2) 
Report Version: 104 

Exception Type: EXC_BAD_ACCESS (SIGSEGV) 
Exception Codes: KERN_INVALID_ADDRESS at 0x2040b743 
Crashed Thread: 6 

Thread 0 name: Dispatch queue: com.apple.main-thread 
Thread 0: 
0 libsystem_kernel.dylib   0x332a5c00 mach_msg_trap + 20 
1 libsystem_kernel.dylib   0x332a5758 mach_msg + 44 
2 CoreFoundation     0x329382b8 __CFRunLoopServiceMachPort + 88 
3 CoreFoundation     0x3293a562 __CFRunLoopRun + 350 
4 CoreFoundation     0x328caebc CFRunLoopRunSpecific + 224 
5 CoreFoundation     0x328cadc4 CFRunLoopRunInMode + 52 
6 GraphicsServices    0x33433418 GSEventRunModal + 108 
7 GraphicsServices    0x334334c4 GSEventRun + 56 
8 UIKit       0x32417d62 -[UIApplication _run] + 398 
9 UIKit       0x32415800 UIApplicationMain + 664 

Thread 1: 
0 libsystem_kernel.dylib   0x332a83ec __workq_kernreturn + 8 
1 libsystem_c.dylib    0x32c966d8 _pthread_wqthread + 592 
2 libsystem_c.dylib    0x32c96bbc start_wqthread + 0 

Thread 2 name: Dispatch queue: com.apple.libdispatch-manager 
Thread 2: 
0 libsystem_kernel.dylib   0x332a8fbc kevent + 24 
1 libdispatch.dylib    0x30205032 _dispatch_mgr_invoke + 706 
2 libdispatch.dylib    0x3020603a _dispatch_queue_invoke + 86 
3 libdispatch.dylib    0x302055ea _dispatch_worker_thread2 + 186 
4 libsystem_c.dylib    0x32c9658a _pthread_wqthread + 258 
5 libsystem_c.dylib    0x32c96bbc start_wqthread + 0 

Thread 3: 
0 libsystem_kernel.dylib   0x332a7d18 __semwait_signal + 24 
1 libsystem_c.dylib    0x32cbc860 _pthread_cond_wait + 756 
2 libsystem_c.dylib    0x32c63eb2 pthread_cond_wait + 26 
3 Foundation      0x33846904 -[NSCondition wait] + 164 
4 Cyntact.dylib     0x0019cebe 0x19c000 + 3774 
5 Foundation      0x33839382 -[NSThread main] + 38 
6 Foundation      0x338ab5c6 __NSThread__main__ + 966 
7 libsystem_c.dylib    0x32c9530a _pthread_start + 242 
8 libsystem_c.dylib    0x32c96bb4 thread_start + 0 

Thread 4 name: WebThread 
Thread 4: 
0 libsystem_kernel.dylib   0x332a5c00 mach_msg_trap + 20 
1 libsystem_kernel.dylib   0x332a5758 mach_msg + 44 
2 CoreFoundation     0x329382b8 __CFRunLoopServiceMachPort + 88 
3 CoreFoundation     0x3293a562 __CFRunLoopRun + 350 
4 CoreFoundation     0x328caebc CFRunLoopRunSpecific + 224 
5 CoreFoundation     0x328cadc4 CFRunLoopRunInMode + 52 
6 WebCore       0x3114b27e RunWebThread(void*) + 382 
7 libsystem_c.dylib    0x32c9530a _pthread_start + 242 
8 libsystem_c.dylib    0x32c96bb4 thread_start + 0 

Thread 5: 
0 libsystem_kernel.dylib   0x332a5c00 mach_msg_trap + 20 
1 libsystem_kernel.dylib   0x332a5758 mach_msg + 44 
2 CoreFoundation     0x329382b8 __CFRunLoopServiceMachPort + 88 
3 CoreFoundation     0x3293a562 __CFRunLoopRun + 350 
4 CoreFoundation     0x328caebc CFRunLoopRunSpecific + 224 
5 CoreFoundation     0x3290d6d2 CFRunLoopRun + 42 
6        0x0003f96a 0x1000 + 256362 
7 Foundation      0x33839382 -[NSThread main] + 38 
8 Foundation      0x338ab5c6 __NSThread__main__ + 966 
9 libsystem_c.dylib    0x32c9530a _pthread_start + 242 
10 libsystem_c.dylib    0x32c96bb4 thread_start + 0 

**Thread 6 Crashed: 
0 libobjc.A.dylib     0x32da1c98 objc_msgSend + 16 
1 CoreFoundation     0x328c519a CFRelease + 62 
2 CFNetwork      0x3563c378 HTTPMessage::~HTTPMessage() + 56 
3 CFNetwork      0x3563c336 HTTPMessage::~HTTPMessage() + 2 
4 CFNetwork      0x3563c262 CFClass::FinalizeObj(void const*) + 10 
5 CoreFoundation     0x328c5288 _CFRelease + 160 
6 CoreFoundation     0x328c51ae CFRelease + 82 
7 CFNetwork      0x3564ad52 HTTPReadFilter::~HTTPReadFilter() + 82 
8 CFNetwork      0x3564acf6 HTTPReadFilter::~HTTPReadFilter() + 2 
9 CFNetwork      0x3563c262 CFClass::FinalizeObj(void const*) + 10 
10 CoreFoundation     0x328c5288 _CFRelease + 160 
11 CoreFoundation     0x328c51ae CFRelease + 82 
12 CFNetwork      0x356ba7cc HTTPReadFilter::readStreamFinalize(__CFReadStream*) + 4 
13 CFNetwork      0x3564acea CFNetworkReadStream::httpStreamFinalize(__CFReadStream*, void*) + 10 
14 CoreFoundation     0x32940bd8 __CFStreamDeallocate + 120 
15 CoreFoundation     0x328c5288 _CFRelease + 160 
16 CoreFoundation     0x328c51ae CFRelease + 82 
17 CFNetwork      0x3564a7fc NetConnection::shutdownConnectionStreams() + 64 
18 CFNetwork      0x356b7b38 NetConnection::closeStreamsIfPossibleOrSignalThatThatNeedsToBeDonePrettyPlease() + 20 
19 CFNetwork      0x3568e018 NetConnection::doNotAllowMoreReqeusts() + 24 
20 CFNetwork      0x356c9324 UnauthConnectionArray::removeValueAtIndex(long) + 28 
21 CFNetwork      0x356c7ade HTTPConnectionCacheEntry::removeAllConnections() + 46 
22 CFNetwork      0x356c77ac HTTPConnectionCacheEntry::setHasBeenForgotten() + 20 
23 CFNetwork      0x356c78fc HTTPConnectionCacheDictionary::forgetCacheEntries() + 60 
24 CFNetwork      0x356c792c ConnectionCacheTLS::resetCacheForThisThread() + 12 
25 CFNetwork      0x35648aa0 ConnectionTimerTLS::_timerPurgeEntries(__CFRunLoopTimer*, void*) + 12 
26 CoreFoundation     0x32937a40 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 8 
27 CoreFoundation     0x32939ec4 __CFRunLoopDoTimer + 844 
28 CoreFoundation     0x3293a83e __CFRunLoopRun + 1082 
29 CoreFoundation     0x328caebc CFRunLoopRunSpecific + 224 
30 CoreFoundation     0x328cadc4 CFRunLoopRunInMode + 52 
31 Foundation      0x338467f6 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 206 
32 Foundation      0x33839382 -[NSThread main] + 38 
33 Foundation      0x338ab5c6 __NSThread__main__ + 966 
34 libsystem_c.dylib    0x32c9530a _pthread_start + 242 
35 libsystem_c.dylib    0x32c96bb4 thread_start + 0** 

Thread 7 name: com.apple.CFSocket.private 
Thread 7: 
0 libsystem_kernel.dylib   0x332a7c60 __select + 20 
1 CoreFoundation     0x3293d8f2 __CFSocketManager + 582 
2 libsystem_c.dylib    0x32c9530a _pthread_start + 242 
3 libsystem_c.dylib    0x32c96bb4 thread_start + 0 

Answer 1

EXC_BAD_ACCESS一般意味着你正在发送一个obj c消息到一个无效的内存地址。通常发生这种情况是因为您正在使用的对象已被释放，而您并不期待它（可能是HTTPMessage）。

**Thread 6 Crashed: 
0 libobjc.A.dylib     0x32da1c98 objc_msgSend + 16 
1 CoreFoundation     0x328c519a CFRelease + 62 
2 CFNetwork      0x3563c378 HTTPMessage::~HTTPMessage() + 56 

它在另一部手机上工作的原因可能只是自动释放的对象没有被同时释放。您应该检查您的保留/发布余额，并可以使用NSZombieEnabled获取更多信息。