Question

我收到了针对上述问题的Crashlytics崩溃报告。

似乎这个问题与CFNetwork有关，但我不直接称之为。但是，我确实使用了似乎引用它的可达性类。

任何人都可以帮助阐明我应该从哪里开始寻找这个吗？

我附上相关日志。

Thread : Crashed: com.apple.root.default-priority
0  libsystem_platform.dylib       0x3accd810 _os_lock_corruption_abort + 18446744073709552000
1  libsystem_platform.dylib       0x3accd80f _OSSpinLockLockSlow$VARIANT$mp + 102
2  CFNetwork                      0x2fec857b CoreStreamBase::_streamSetEventAndScheduleDelivery(unsigned long, unsigned char) + 30
3  CFNetwork                      0x2fec6f85 CoreStreamBase::_streamInterface_Open() + 108
4  CFNetwork                      0x2feeb56b HTTPReadStream::startRequest(CFStreamError*) + 858
5  CFNetwork                      0x2feeae95 HTTPReadStream::_streamImpl_Open(CFStreamError*, unsigned char*) + 416
6  CFNetwork                      0x2ff23933 non-virtual thunk to HTTPReadStream::_streamImpl_Open(CFStreamError*, unsigned char*) + 10
7  CFNetwork                      0x2fec6f45 CoreStreamBase::_streamInterface_Open() + 44
8  CFNetwork                      0x2ff12c39 ___ZL24executionContextSchedulePvP11__CFRunLoopPK10__CFString_block_invoke + 448
9  libdispatch.dylib              0x3ab8ed7b _dispatch_call_block_and_release + 10
10 libdispatch.dylib              0x3ab95da5 _dispatch_root_queue_drain + 220
11 libdispatch.dylib              0x3ab95f8d _dispatch_worker_thread2 + 56
12 libsystem_pthread.dylib        0x3acd0dbf _pthread_wqthread + 298


Thread : com.apple.main-thread
0  libobjc.A.dylib                0x3a6a6b22 objc_msgSend + 1
1  CoreFoundation                 0x3020ff33 -[__NSDictionaryM objectForKey:] + 70
2  Foundation                     0x30c2a85b -[NSDateFormatter setDateFormat:] + 82
3  AppTest00001                   0x00098c73 -[AppDelegate checkSubs] (AppDelegate.m:342)
4  AppTest00001                   0x0009785b -[AppDelegate application:didFinishLaunchingWithOptions:] (AppDelegate.m:102)
5  UIKit                          0x32ab4cb7 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 274
6  UIKit                          0x32ab4707 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1390
7  UIKit                          0x32aaed13 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 714
8  UIKit                          0x32a496a7 -[UIApplication handleEvent:withNewEvent:] + 3130
9  UIKit                          0x32a489a9 -[UIApplication sendEvent:] + 72
10 UIKit                          0x32aae4fd _UIApplicationHandleEvent + 664
11 GraphicsServices               0x34f2870d _PurpleEventCallback + 608
12 GraphicsServices               0x34f282f7 PurpleEventCallback + 34
13 CoreFoundation                 0x3029d9e7 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 34
14 CoreFoundation                 0x3029d983 __CFRunLoopDoSource1 + 346
15 CoreFoundation                 0x3029c157 __CFRunLoopRun + 1398
16 CoreFoundation                 0x30206ce7 CFRunLoopRunSpecific + 522
17 CoreFoundation                 0x30206acb CFRunLoopRunInMode + 106
18 UIKit                          0x32aad799 -[UIApplication _run] + 760
19 UIKit                          0x32aa8a41 UIApplicationMain + 1136
20 AppTest00001                   0x0009cd3f main (main.m:16)

主题：com.apple.CFURLCACHE_work_queue 0 libsystem_kernel.dylib
  0x3ac588fc pread + 20 1 libsqlite3.dylib 0x3a94e5bd   sqlite3_snprintf + 8252 2 libsqlite3.dylib 0x3a961b0d   sqlite3_finalize + 11428 3 libsqlite3.dylib 0x3a961629   sqlite3_finalize + 10176 4 libsqlite3.dylib 0x3a960f9d   sqlite3_finalize + 8500 5 libsqlite3.dylib 0x3a960299   sqlite3_finalize + 5168 6 libsqlite3.dylib 0x3a95d183   sqlite3_exec + 55702 7 libsqlite3.dylib 0x3a95cf99   sqlite3_exec + 55212 8 libsqlite3.dylib 0x3a959c0f   sqlite3_exec + 42018 9 libsqlite3.dylib 0x3a953853   sqlite3_exec + 16486 10 libsqlite3.dylib 0x3a950f9d   sqlite3_exec + 6064 11 libsqlite3.dylib 0x3a950797   sqlite3_exec + 4010 12 libsqlite3.dylib 0x3a9500fb   sqlite3_exec + 2318 13 libsqlite3.dylib 0x3a94fe4d   sqlite3_exec + 1632 14 libsqlite3.dylib 0x3a94f927   sqlite3_exec + 314 15 CFNetwork 0x2fecb797   __CFURLCache :: OpenDatabase（）+ 246 16 CFNetwork 0x2ff08edd __CFURLCache :: ProcessCacheTasks0（bool）+ 448 17 CFNetwork
  0x2ff08c21 __CFURLCache :: ProcessCacheTasks（bool）+ 36 18 CFNetwork
  0x2ff08ab7 __CFURLCache :: _ CFURLCacheTimerCallback0（）+ 626 19   CFNetwork 0x2ff08839   __CFURLCache :: _ CFURLCacheTimerCallback（void *）+ 32 20 CFNetwork 0x2ff0c339   ___ZN12__CFURLCache29SignalWorkerTaskToPerformWorkEv_block_invoke + 12 21 libdispatch.dylib 0x3ab8ed7b   _dispatch_call_block_and_release + 10 22 libdispatch.dylib 0x3ab95297 _dispatch_queue_drain $ VARIANT $ mp + 374 23 libdispatch.dylib   0x3ab9509b _dispatch_queue_invoke $ VARIANT $ mp + 42 24 libdispatch.dylib   0x3ab95d15 _dispatch_root_queue_drain + 76 25 libdispatch.dylib
  0x3ab95f8d _dispatch_worker_thread2 + 56 26 libsystem_pthread.dylib
  0x3acd0dbf _pthread_wqthread + 298

Thread : com.apple.NSURLConnectionLoader (com.apple.root.default-overcommit-priority)
0  libsystem_kernel.dylib         0x3ac69fa8 __psynch_mutexwait + 24
1  libsystem_pthread.dylib        0x3acd0f0f _pthread_mutex_lock + 306
2  CFNetwork                      0x2ff12ea7 PACEntryStreamCallback(__CoreReadStream*, unsigned long, void*) + 70
3  CFNetwork                      0x2fec8831 CoreReadStreamClient::coreStreamEventsAvailable(unsigned long) + 36
4  CFNetwork                      0x2ff6f173 CoreStreamBase::_callClientNow(CoreStreamClient*) + 42
5  CFNetwork                      0x2ff6f193 ___ZN14CoreStreamBase34_streamSetEventAndScheduleDeliveryEmh_block_invoke + 22
6  CFNetwork                      0x2ff7031f ___ZNK17CoreSchedulingSet13_performAsyncEPKcU13block_pointerFvvE_block_invoke + 18
7  CoreFoundation                 0x30206719 CFArrayApplyFunction + 36
8  CFNetwork                      0x2fed6c3d RunloopBlockContext::perform() + 164
9  CFNetwork                      0x2fed6b0d MultiplexerSource::perform() + 220
10 CFNetwork                      0x2fed69a1 MultiplexerSource::_perform(void*) + 48
11 CoreFoundation                 0x3029e18b __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 14
12 CoreFoundation                 0x3029d65b __CFRunLoopDoSources0 + 206
13 CoreFoundation                 0x3029be4f __CFRunLoopRun + 622
14 CoreFoundation                 0x30206ce7 CFRunLoopRunSpecific + 522
15 CoreFoundation                 0x30206acb CFRunLoopRunInMode + 106
16 Foundation                     0x30c40497 +[NSURLConnection(Loader) _resourceLoadLoop:] + 318
17 Foundation                     0x30cb5e27 __NSThread__main__ + 1062
18 libsystem_pthread.dylib        0x3acd2c1d _pthread_body + 140
19 libsystem_pthread.dylib        0x3acd2b8f _pthread_start + 102

Answer 1

IIRC，_ os_lock_corruption_abort通常是由访问其数据已被其他数据覆盖的锁引起的（假设您没有做任何会导致某处缓冲区溢出的事情）可能是由僵尸继续接收方法调用引起的在它完全释放和解除分配后。

可达性使用NSURLConnection来确定在设备的连接状态发生变化后（例如，在连接到Wi-Fi网络或漫游到蜂窝范围之后），您指定的URL是否可访问，因此NSURLConnection中的任何错误都将显示在可达性API也是如此。

现在我不知道为什么NSURLConnection有一个僵尸问题，但我自己也注意到了，在网络堆栈的随机部分中有几十个崩溃的独特回溯，每一个都指向数据在NSURLConnection对象消失后到达套接字，最常见的是在处理代理PAC文件时JavaScriptCore崩溃。这是不可能的，因为除了NSURLConnection本身保留自己及其委托之外，我们也没有在不取消它们的情况下释放任何连接对象。然而，我仍然看到了崩溃。

为了解决这个问题，我正在添加代码，以便在释放它们之前积极地保持我们的NSURLConnection对象超过一段时间。显然，对于与可达性相关的请求，你必须通过调用指定的NSURLConnection初始化器来实现（显然这是一个选项）。

我的一般建议是忽略这一点，除非你看到很多崩溃，因为调情是一种严重的痛苦。话虽如此，如果你看到很多崩溃，可能值得采用类似的方法。

希望有所帮助。

iOS Crash CFNetwork CoreStreamBase :: _ streamSetEventAndScheduleDelivery（unsigned long，unsigned char）

1 个答案: