我在 AppStore 中的应用程序中不断发生这些崩溃。 CrashReport 总是看起来像这样:
Incident Identifier: 986486D7-F013-4102-B9E3-84F923223914
CrashReporter Key: [TODO]
Hardware Model: iPhone4,1
Process: MyApp [57885]
Path: /Users/USER/MyApp.app/MyApp
Identifier: de.myapp.iphone
Version: 12475
Code Type: ARM
Parent Process: launchd [1]
Date/Time: 2012-12-20 15:48:53 +0000
OS Version: iPhone OS 6.0.1 (10A523)
Report Version: 104
Exception Type: SIGTRAP
Exception Codes: #0 at 0x3abd62be
Crashed Thread: 0
Thread 0 Crashed:
0 CoreFoundation 0x363582be CFRelease + 18
1 WebCore 0x383de395 WebCore::stopSharedTimer() + 33
2 WebCore 0x38433515 WebCore::TimerBase::~TimerBase() + 45
3 WebCore 0x3846003b WebCore::Document::~Document() + 2751
4 WebCore 0x3845f56d WebCore::HTMLDocument::~HTMLDocument() + 81
5 WebCore 0x384e9473 WebCore::JSNodeOwner::finalize(JSC::Handle<JSC::Unknown>, void*) + 79
6 JavaScriptCore 0x321e2067 JSC::WeakBlock::sweep() + 87
7 JavaScriptCore 0x321e22ad JSC::WeakSet::sweep() + 53
8 JavaScriptCore 0x3213d877 JSC::Heap::collect(JSC::Heap::SweepToggle) + 175
9 JavaScriptCore 0x3213cad9 JSC::DefaultGCActivityCallbackPlatformData::timerDidFire(__CFRunLoopTimer*, void*) + 145
10 CoreFoundation 0x363ec5df __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 15
11 CoreFoundation 0x363ec291 __CFRunLoopDoTimer + 273
12 CoreFoundation 0x363eaf01 __CFRunLoopRun + 1233
13 CoreFoundation 0x3635debd CFRunLoopRunSpecific + 357
14 CoreFoundation 0x3635dd49 CFRunLoopRunInMode + 105
15 GraphicsServices 0x3490e2eb GSEventRunModal + 75
16 UIKit 0x37b2b2f9 UIApplicationMain + 1121
17 MyApp 0x00003927 main (main.m:20)
Thread 5:
0 libsystem_kernel.dylib 0x3681feb4 mach_msg_trap + 20
1 CoreFoundation 0x363ec045 __CFRunLoopServiceMachPort + 129
2 CoreFoundation 0x363eada3 __CFRunLoopRun + 883
3 CoreFoundation 0x3635debd CFRunLoopRunSpecific + 357
4 CoreFoundation 0x3635dd49 CFRunLoopRunInMode + 105
5 Foundation 0x307f978f -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 255
6 Foundation 0x3089d05d -[NSRunLoop(NSRunLoop) run] + 81
7 MyApp 0x000c3225 +[AFURLConnectionOperation networkRequestThreadEntryPoint:] (AFURLConnectionOperation.m:157)
8 Foundation 0x308a667d __NSThread__main__ + 973
9 libsystem_c.dylib 0x33ab5311 _pthread_start + 309
Thread 6:
0 libsystem_kernel.dylib 0x3681feb4 mach_msg_trap + 20
1 CoreFoundation 0x363ec045 __CFRunLoopServiceMachPort + 129
2 CoreFoundation 0x363eada3 __CFRunLoopRun + 883
3 CoreFoundation 0x3635debd CFRunLoopRunSpecific + 357
4 CoreFoundation 0x3635dd49 CFRunLoopRunInMode + 105
5 Foundation 0x30822bcd +[NSURLConnection(Loader) _resourceLoadLoop:] + 309
6 Foundation 0x308a667d __NSThread__main__ + 973
7 libsystem_c.dylib 0x33ab5311 _pthread_start + 309
Thread 7:
0 libsystem_kernel.dylib 0x368300fc __psynch_mutexwait + 24
1 CFNetwork 0x3137647f __CFURLCache::ExecuteSQLSelectAndCreateResponse(__CFString const*, bool) + 179
2 CFNetwork 0x313763b1 __CFURLCache::LookupCachedURLResponse(__CFURLCacheNode*, bool) + 13
3 CFNetwork 0x31387893 __CFURLCache::CopyResponseForRequest(_CFURLRequest const*, bool) + 231
4 CFNetwork 0x313c2ee1 __CFURLCacheCopyResponseForRequestInternal(_CFURLCache const*, _CFURLRequest const*, unsigned char) + 33
5 CFNetwork 0x313fe8bd ___loaderEvent_StartLoad_block_invoke_0 + 45
6 CFNetwork 0x3141e657 ConnectionSession::withStorageSession(void ( block_pointer)(StorageSession const*)) const + 83
7 CFNetwork 0x313ff9d5 __withStorageSessionAsync_block_invoke_0 + 17
8 CFNetwork 0x313d3639 __withConnectionSessionAsync_block_invoke_0 + 17
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 8:
0 libsystem_kernel.dylib 0x368300fc __psynch_mutexwait + 24
1 CFNetwork 0x3137647f __CFURLCache::ExecuteSQLSelectAndCreateResponse(__CFString const*, bool) + 179
2 CFNetwork 0x313763b1 __CFURLCache::LookupCachedURLResponse(__CFURLCacheNode*, bool) + 13
3 CFNetwork 0x31387893 __CFURLCache::CopyResponseForRequest(_CFURLRequest const*, bool) + 231
4 CFNetwork 0x313c2ee1 __CFURLCacheCopyResponseForRequestInternal(_CFURLCache const*, _CFURLRequest const*, unsigned char) + 33
5 CFNetwork 0x313fe8bd ___loaderEvent_StartLoad_block_invoke_0 + 45
6 CFNetwork 0x3141e657 ConnectionSession::withStorageSession(void ( block_pointer)(StorageSession const*)) const + 83
7 CFNetwork 0x313ff9d5 __withStorageSessionAsync_block_invoke_0 + 17
8 CFNetwork 0x313d3639 __withConnectionSessionAsync_block_invoke_0 + 17
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 10:
0 libsystem_kernel.dylib 0x368300fc __psynch_mutexwait + 24
1 CFNetwork 0x3137647f __CFURLCache::ExecuteSQLSelectAndCreateResponse(__CFString const*, bool) + 179
2 CFNetwork 0x313763b1 __CFURLCache::LookupCachedURLResponse(__CFURLCacheNode*, bool) + 13
3 CFNetwork 0x31387893 __CFURLCache::CopyResponseForRequest(_CFURLRequest const*, bool) + 231
4 CFNetwork 0x313c2ee1 __CFURLCacheCopyResponseForRequestInternal(_CFURLCache const*, _CFURLRequest const*, unsigned char) + 33
5 CFNetwork 0x313fe8bd ___loaderEvent_StartLoad_block_invoke_0 + 45
6 CFNetwork 0x3141e657 ConnectionSession::withStorageSession(void ( block_pointer)(StorageSession const*)) const + 83
7 CFNetwork 0x313ff9d5 __withStorageSessionAsync_block_invoke_0 + 17
8 CFNetwork 0x313d3639 __withConnectionSessionAsync_block_invoke_0 + 17
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 13:
0 libsystem_kernel.dylib 0x3682239c pread + 20
1 libsqlite3.dylib 0x33978109 sqlite3_get_table + 125
2 libsqlite3.dylib 0x339772a7 sqlite3_get_table + 125
3 libsqlite3.dylib 0x33d25fb1 0x33cde000 + 294833
4 libsqlite3.dylib 0x33d13807 0x33cde000 + 219143
5 libsqlite3.dylib 0x33d0d49d 0x33cde000 + 193693
6 libsqlite3.dylib 0x3398648f sqlite3_step + 2143
7 CFNetwork 0x3138276b __CFURLCache::DoBulkLookupAndStoreBasedOnTime(__CFString const*) + 459
8 CFNetwork 0x313c4667 __ExecuteSQLSelectAndCreateResponse_block_invoke_0 + 35
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 17:
0 libsystem_kernel.dylib 0x3683008c __psynch_cvwait + 24
1 libsystem_c.dylib 0x33aadaa5 pthread_cond_timedwait + 45
2 JavaScriptCore 0x320d6c75 WTF::ThreadCondition::timedWait(WTF::Mutex&, double) + 109
3 JavaScriptCore 0x321e8557 JSC::BlockAllocator::blockFreeingThreadMain() + 83
4 JavaScriptCore 0x321fafab _ZN3WTFL19wtfThreadEntryPointEPv + 15
5 libsystem_c.dylib 0x33ab5311 _pthread_start + 309
Thread 18:
0 libsystem_kernel.dylib 0x3683008c __psynch_cvwait + 24
1 libsystem_c.dylib 0x33ab7f19 pthread_cond_wait + 41
2 JavaScriptCore 0x3217bf41 JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode) + 149
3 JavaScriptCore 0x3217be81 JSC::MarkStackThreadSharedData::markingThreadMain() + 145
4 JavaScriptCore 0x321fafab _ZN3WTFL19wtfThreadEntryPointEPv + 15
5 libsystem_c.dylib 0x33ab5311 _pthread_start + 309
Thread 22:
0 libsystem_kernel.dylib 0x368300fc __psynch_mutexwait + 24
1 CFNetwork 0x3137647f __CFURLCache::ExecuteSQLSelectAndCreateResponse(__CFString const*, bool) + 179
2 CFNetwork 0x313763b1 __CFURLCache::LookupCachedURLResponse(__CFURLCacheNode*, bool) + 13
3 CFNetwork 0x31387893 __CFURLCache::CopyResponseForRequest(_CFURLRequest const*, bool) + 231
4 CFNetwork 0x313c2ee1 __CFURLCacheCopyResponseForRequestInternal(_CFURLCache const*, _CFURLRequest const*, unsigned char) + 33
5 CFNetwork 0x313fe8bd ___loaderEvent_StartLoad_block_invoke_0 + 45
6 CFNetwork 0x3141e657 ConnectionSession::withStorageSession(void ( block_pointer)(StorageSession const*)) const + 83
7 CFNetwork 0x313ff9d5 __withStorageSessionAsync_block_invoke_0 + 17
8 CFNetwork 0x313d3639 __withConnectionSessionAsync_block_invoke_0 + 17
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 25:
0 libsystem_kernel.dylib 0x368300fc __psynch_mutexwait + 24
1 CFNetwork 0x3137647f __CFURLCache::ExecuteSQLSelectAndCreateResponse(__CFString const*, bool) + 179
2 CFNetwork 0x313763b1 __CFURLCache::LookupCachedURLResponse(__CFURLCacheNode*, bool) + 13
3 CFNetwork 0x31387893 __CFURLCache::CopyResponseForRequest(_CFURLRequest const*, bool) + 231
4 CFNetwork 0x313c2ee1 __CFURLCacheCopyResponseForRequestInternal(_CFURLCache const*, _CFURLRequest const*, unsigned char) + 33
5 CFNetwork 0x313fe8bd ___loaderEvent_StartLoad_block_invoke_0 + 45
6 CFNetwork 0x3141e657 ConnectionSession::withStorageSession(void ( block_pointer)(StorageSession const*)) const + 83
7 CFNetwork 0x313ff9d5 __withStorageSessionAsync_block_invoke_0 + 17
8 CFNetwork 0x313d3639 __withConnectionSessionAsync_block_invoke_0 + 17
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 43:
0 libsystem_kernel.dylib 0x3682239c pread + 20
1 libsqlite3.dylib 0x33978109 sqlite3_get_table + 125
2 libsqlite3.dylib 0x339772a7 sqlite3_get_table + 125
3 libsqlite3.dylib 0x33d25fb1 0x33cde000 + 294833
4 libsqlite3.dylib 0x33d13807 0x33cde000 + 219143
5 libsqlite3.dylib 0x33d0d49d 0x33cde000 + 193693
6 libsqlite3.dylib 0x3398648f sqlite3_step + 2143
7 CFNetwork 0x3138276b __CFURLCache::DoBulkLookupAndStoreBasedOnTime(__CFString const*) + 459
8 CFNetwork 0x313c4667 __ExecuteSQLSelectAndCreateResponse_block_invoke_0 + 35
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 44:
0 libsystem_kernel.dylib 0x368300fc __psynch_mutexwait + 24
1 CFNetwork 0x31382619 __CFURLCache::DoBulkLookupAndStoreBasedOnTime(__CFString const*) + 121
2 CFNetwork 0x313c4667 __ExecuteSQLSelectAndCreateResponse_block_invoke_0 + 35
3 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
4 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
5 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
6 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 47:
0 libsystem_kernel.dylib 0x368300fc __psynch_mutexwait + 24
1 CFNetwork 0x3137647f __CFURLCache::ExecuteSQLSelectAndCreateResponse(__CFString const*, bool) + 179
2 CFNetwork 0x313763b1 __CFURLCache::LookupCachedURLResponse(__CFURLCacheNode*, bool) + 13
3 CFNetwork 0x31387893 __CFURLCache::CopyResponseForRequest(_CFURLRequest const*, bool) + 231
4 CFNetwork 0x313c2ee1 __CFURLCacheCopyResponseForRequestInternal(_CFURLCache const*, _CFURLRequest const*, unsigned char) + 33
5 CFNetwork 0x313fe8bd ___loaderEvent_StartLoad_block_invoke_0 + 45
6 CFNetwork 0x3141e657 ConnectionSession::withStorageSession(void ( block_pointer)(StorageSession const*)) const + 83
7 CFNetwork 0x313ff9d5 __withStorageSessionAsync_block_invoke_0 + 17
8 CFNetwork 0x313d3639 __withConnectionSessionAsync_block_invoke_0 + 17
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 49:
0 libsystem_kernel.dylib 0x368300fc __psynch_mutexwait + 24
1 CFNetwork 0x3137647f __CFURLCache::ExecuteSQLSelectAndCreateResponse(__CFString const*, bool) + 179
2 CFNetwork 0x313763b1 __CFURLCache::LookupCachedURLResponse(__CFURLCacheNode*, bool) + 13
3 CFNetwork 0x31387893 __CFURLCache::CopyResponseForRequest(_CFURLRequest const*, bool) + 231
4 CFNetwork 0x313c2ee1 __CFURLCacheCopyResponseForRequestInternal(_CFURLCache const*, _CFURLRequest const*, unsigned char) + 33
5 CFNetwork 0x313fe8bd ___loaderEvent_StartLoad_block_invoke_0 + 45
6 CFNetwork 0x3141e657 ConnectionSession::withStorageSession(void ( block_pointer)(StorageSession const*)) const + 83
7 CFNetwork 0x313ff9d5 __withStorageSessionAsync_block_invoke_0 + 17
8 CFNetwork 0x313d3639 __withConnectionSessionAsync_block_invoke_0 + 17
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 50:
0 libsystem_kernel.dylib 0x368300fc __psynch_mutexwait + 24
1 CFNetwork 0x3137647f __CFURLCache::ExecuteSQLSelectAndCreateResponse(__CFString const*, bool) + 179
2 CFNetwork 0x313763b1 __CFURLCache::LookupCachedURLResponse(__CFURLCacheNode*, bool) + 13
3 CFNetwork 0x31387893 __CFURLCache::CopyResponseForRequest(_CFURLRequest const*, bool) + 231
4 CFNetwork 0x313c2ee1 __CFURLCacheCopyResponseForRequestInternal(_CFURLCache const*, _CFURLRequest const*, unsigned char) + 33
5 CFNetwork 0x313fe8bd ___loaderEvent_StartLoad_block_invoke_0 + 45
6 CFNetwork 0x3141e657 ConnectionSession::withStorageSession(void ( block_pointer)(StorageSession const*)) const + 83
7 CFNetwork 0x313ff9d5 __withStorageSessionAsync_block_invoke_0 + 17
8 CFNetwork 0x313d3639 __withConnectionSessionAsync_block_invoke_0 + 17
9 libdispatch.dylib 0x3807711f _dispatch_call_block_and_release + 11
10 libdispatch.dylib 0x3807b961 _dispatch_root_queue_drain + 253
11 libdispatch.dylib 0x3807bac1 _dispatch_worker_thread2 + 85
12 libsystem_c.dylib 0x33aaaa11 _pthread_wqthread + 361
Thread 51:
0 libsystem_kernel.dylib 0x36830d98 __workq_kernreturn + 8
1 libsystem_c.dylib 0x33aaaa16 _pthread_wqthread + 366
Thread 0 crashed with ARM Thread State:
r0: 0x00000000 r1: 0x5df80157 r2: 0x1ddd4000 r3: 0x38596026
r4: 0x3be2c86c r5: 0x00000000 r6: 0x00000000 r7: 0x2fd1be1c
r8: 0x00000000 r9: 0x00293498 r10: 0x00388800 r11: 0x04432d90
ip: 0x3bd68a50 sp: 0x2fd1bde8 lr: 0x368ba395 pc: 0x3abd62be
cpsr: 0x60000030
我基本上是在 UIViewController 中使用 AFJSONRequestOperation，它已被推送到 NavigationController 以获取显示其内容的 JSON。 是 AFNetworking 导致崩溃(在线程 5 中)吗？或者它可能是我的代码中的一个缺陷？我真的卡住了，而且这种情况经常发生。非常感谢任何帮助或问题!
最佳答案
根据崩溃，这不是线程 5 的问题；这是线程 0 中的问题。
Brian 在他的博文中添加了一些关于计时器如何在 webkit 中运行的背景信息。
http://brrian.tumblr.com/post/13951629341/how-webkits-event-model-works
有趣的是，问题操作系统是 6.0.1，而不是较新的 6.1 版本，也不是 7.x(截至撰写本文时)。
崩溃发生在 CFRelease 期间，这往往发生在资源已被释放时。我的建议是查看问题是否发生在任何较新的操作系统上，因为它听起来像是 WebKit 错误。 Webkit 是负责定时器的代码。
无论如何，定时器代码已经被重新处理: https://trac.webkit.org/changeset/143210
所以我认为最好的选择是查看最新的 iOS 或最新的 6.x (6.1) 是否有过此崩溃。
如果做不到这一点，假设您无法重现问题，因为您正在进行网络查询(和数据库查询)，当您的网络连接速度慢/不可靠时，计时器出现的经典方式。使用 Apple 的 Network Link Conditioner 来模拟这种情况。这可能会在 WebKit 中显示问题。
关于ios - 未知的崩溃原因(附有 CrashReport)SIGTRAP。 AF网络？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13988037/