ios - NO_CRASH_STACK + 0 [Xcode 10.1] 崩溃

Question

我的应用程序遇到错误，影响了近 80% 的活跃用户。

好像和线程有关系

`com.twitter.crashlytics.ios.MachExceptionServer`

但我一直无法追踪它，最糟糕的是我什至不知道这个崩溃何时发生，我的猜测是当应用程序在 DidFinishLaunchingWithOptions 方法中启动时发生。 :/

希望你能帮助我，我对崩溃跟踪这件事很陌生。

这是崩溃日志。

Incident Identifier: F627A1C2-A28A-4200-8920-1F77D3C0855C
CrashReporter Key:   88dbf413f263228712a90868f4c08e9d59a715f8
Hardware Model:      iPhone10,4
Process:             <APP_NAME> [1285]
Path:                /private/var/containers/Bundle/Application/XXXXXXXXXXXXXXXXX/<APP_NAME>.app/<APP_NAME>
Identifier:          xxx.xxxxxxxx.<APP_NAME>
Version:             34 (4.0.0)
AppStoreTools:       10B63
AppVariant:          1:iPhone10,4:12
Code Type:           ARM-64 (Native)
Role:                Non UI
Parent Process:      launchd [1]
Coalition:           xxx.xxxxxx.xxxxxx [677]


Date/Time:           2018-12-16 16:41:34.1689 -0600
Launch Time:         2018-12-16 15:52:00.9225 -0600
OS Version:          iPhone OS 12.1 (16B92)
Baseband Version:    2.01.07
Report Version:      104

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000f262e3bc0
VM Region Info: 0xf262e3bc0 is not in any region.  Bytes after previous region: 53790784449  
      REGION TYPE                      START - END             [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      MALLOC_NANO            0000000280000000-00000002a0000000 [512.0M] rw-/rwx SM=PRV  
--->  
      UNUSED SPACE AT END

Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [1285]
Triggered by Thread:  10

Thread 0 name:
Thread 0:
0   libsystem_kernel.dylib          0x0000000203c3bed0 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x0000000203c3b3a8 mach_msg + 72 (mach_msg.c:103)
2   CoreFoundation                  0x000000020403fbc4 __CFRunLoopServiceMachPort + 236 (CFRunLoop.c:2615)
3   CoreFoundation                  0x000000020403aa60 __CFRunLoopRun + 1396 (CFRunLoop.c:2971)
4   CoreFoundation                  0x000000020403a1cc CFRunLoopRunSpecific + 436 (CFRunLoop.c:3247)
5   GraphicsServices                0x00000002062b1584 GSEventRunModal + 100 (GSEvent.c:2245)
6   UIKitCore                       0x000000023127d054 UIApplicationMain + 212 (UIApplication.m:4347)
7   <APP_NAME>                          0x0000000104ae4548 main + 17736 (AppDelegate.swift:22)
8   libdyld.dylib                   0x0000000203afabb4 start + 4

Thread 1 name:
Thread 1:
0   libsystem_kernel.dylib          0x0000000203c3bed0 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x0000000203c3b3a8 mach_msg + 72 (mach_msg.c:103)
2   CoreFoundation                  0x000000020403fbc4 __CFRunLoopServiceMachPort + 236 (CFRunLoop.c:2615)
3   CoreFoundation                  0x000000020403aa60 __CFRunLoopRun + 1396 (CFRunLoop.c:2971)
4   CoreFoundation                  0x000000020403a1cc CFRunLoopRunSpecific + 436 (CFRunLoop.c:3247)
5   Foundation                      0x0000000204a2f404 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 300 (NSRunLoop.m:367)
6   Foundation                      0x0000000204a2f2b0 -[NSRunLoop(NSRunLoop) runUntilDate:] + 148 (NSRunLoop.m:411)
7   UIKitCore                       0x000000023136a808 -[UIEventFetcher threadMain] + 136 (UIEventFetcher.m:603)
8   Foundation                      0x0000000204b621ac __NSThread__start__ + 1040 (NSThread.m:1175)
9   libsystem_pthread.dylib         0x0000000203ccb2ac _pthread_body + 128 (pthread.c:857)
10  libsystem_pthread.dylib         0x0000000203ccb20c _pthread_start + 48 (pthread.c:884)
11  libsystem_pthread.dylib         0x0000000203ccecf4 thread_start + 4

Thread 2 name:  com.twitter.crashlytics.ios.MachExceptionServer
Thread 2:
0   libsystem_kernel.dylib          0x0000000203c3bed0 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x0000000203c3b3a8 mach_msg + 72
2   <APP_NAME>                          0x0000000104f0c490 CLSMachExceptionServer + 952
3   libsystem_pthread.dylib         0x0000000203ccb2ac _pthread_body + 128
4   libsystem_pthread.dylib         0x0000000203ccb20c _pthread_start + 48
5   libsystem_pthread.dylib         0x0000000203ccecf4 thread_start + 4

Thread 3 name:
Thread 3:
0   libsystem_kernel.dylib          0x0000000203c3bed0 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x0000000203c3b3a8 mach_msg + 72 (mach_msg.c:103)
2   CoreFoundation                  0x000000020403fbc4 __CFRunLoopServiceMachPort + 236 (CFRunLoop.c:2615)
3   CoreFoundation                  0x000000020403aa60 __CFRunLoopRun + 1396 (CFRunLoop.c:2971)
4   CoreFoundation                  0x000000020403a1cc CFRunLoopRunSpecific + 436 (CFRunLoop.c:3247)
5   CFNetwork                       0x000000020465b834 -[__CoreSchedulingSetRunnable runForever] + 212 (CoreSchedulingSet.mm:1365)
6   Foundation                      0x0000000204b621ac __NSThread__start__ + 1040 (NSThread.m:1175)
7   libsystem_pthread.dylib         0x0000000203ccb2ac _pthread_body + 128 (pthread.c:857)
8   libsystem_pthread.dylib         0x0000000203ccb20c _pthread_start + 48 (pthread.c:884)
9   libsystem_pthread.dylib         0x0000000203ccecf4 thread_start + 4

Thread 4:
0   libsystem_pthread.dylib         0x0000000203ccece8 start_wqthread + 0

Thread 5:
0   libsystem_pthread.dylib         0x0000000203ccece8 start_wqthread + 0

Thread 6:
0   libsystem_pthread.dylib         0x0000000203ccece8 start_wqthread + 0

Thread 7:
0   libsystem_pthread.dylib         0x0000000203ccece8 start_wqthread + 0

Thread 8 name:
Thread 8:
0   libsystem_malloc.dylib          0x0000000203c80c74 nanov2_allocate_from_block$VARIANT$armv81 + 220
1   libsystem_malloc.dylib          0x0000000203c80040 nanov2_allocate$VARIANT$armv81 + 140
2   libsystem_malloc.dylib          0x0000000203c80040 nanov2_allocate$VARIANT$armv81 + 140
3   libsystem_malloc.dylib          0x0000000203c80540 nanov2_calloc$VARIANT$armv81 + 136
4   libsystem_malloc.dylib          0x0000000203c8db74 malloc_zone_calloc + 140 (malloc.c:1475)
5   libsystem_malloc.dylib          0x0000000203c8e3fc calloc + 40 (malloc.c:1731)
6   libobjc.A.dylib                 0x0000000203290554 class_createInstance + 72 (objc-runtime-new.mm:0)
7   libdispatch.dylib               0x0000000203ae9ad8 _os_object_alloc_realized + 40 (object.m:55)
8   libdispatch.dylib               0x0000000203ae3af4 dispatch_data_create_concat$VARIANT$armv81 + 164 (data.c:118)
9   CFNetwork                       0x00000002048b8ffc invocation function for block in ConnectionProtocolReadInner(nw_protocol*, unsigned int, unsigned int, bool, long long, void (dispatch_data_s*, CFStreamError) block_pointer, void (nw_frame_array_s*, CFStreamError) block_pointer) + 152 (ConnectionProtocol.cpp:771)
10  libnetwork.dylib                0x00000002050d3474 nw_frame_array_foreach + 48 (frame_internal.h:999)
11  CFNetwork                       0x00000002048b64ac ConnectionProtocolReadInner(nw_protocol*, unsigned int, unsigned int, bool, long long, void (dispatch_data_s*, CFStreamError) block_pointer, void (nw_frame_array_s*, CFStreamError) block_pointer) + 408 (ConnectionProtocol.cpp:755)
12  CFNetwork                       0x00000002048b6264 ConnectionProtocolServiceReads(nw_protocol*) + 380 (ConnectionProtocol.cpp:658)
13  CFNetwork                       0x00000002048b7270 ConnectionProtocolInputAvailable(nw_protocol*, nw_protocol*) + 64 (ConnectionProtocol.cpp:964)
14  libboringssl.dylib              0x0000000204f34ac8 nw_boringssl_read + 532 (protocol_boringssl.m:1177)
15  libboringssl.dylib              0x0000000204f362a4 nw_protocol_boringssl_input_available + 120 (protocol_boringssl.m:1218)
16  libusrtcp.dylib                 0x00000002053d8e9c nw_protocol_tcp_wake_read + 484 (protocol_tcp.c:269)
17  libusrtcp.dylib                 0x00000002053c9774 nw_protocol_tcp_input_flush + 100 (user_north.c:40)
18  libnetwork.dylib                0x0000000205167474 nw_channel_add_input_frames + 4184 (channel.c:1096)
19  libnetwork.dylib                0x00000002051663b8 nw_channel_update_input_source + 136 (channel.c:1138)
20  libnetwork.dylib                0x0000000205165c08 __nw_channel_create_block_invoke.21 + 52 (channel.c:1960)
21  libdispatch.dylib               0x0000000203aea484 _dispatch_client_callout + 16 (object.m:511)
22  libdispatch.dylib               0x0000000203ac0e14 _dispatch_continuation_pop$VARIANT$armv81 + 404 (inline_internal.h:2441)
23  libdispatch.dylib               0x0000000203ad0ab4 _dispatch_source_invoke$VARIANT$armv81 + 1704 (source.c:568)
24  libdispatch.dylib               0x0000000203ac6d70 _dispatch_workloop_invoke$VARIANT$armv81 + 1892 (inline_internal.h:2482)
25  libdispatch.dylib               0x0000000203acdf14 _dispatch_workloop_worker_thread + 584 (queue.c:5889)
26  libsystem_pthread.dylib         0x0000000203ccc0dc _pthread_wqthread + 312 (pthread.c:2363)
27  libsystem_pthread.dylib         0x0000000203ccecec start_wqthread + 4

Thread 9:
0   libsystem_pthread.dylib         0x0000000203ccece8 start_wqthread + 0

Thread 10 name:
Thread 10 Crashed:
0   libobjc.A.dylib                 0x0000000203298d70 objc_msgSend + 16
1   CoreData                        0x0000000206c17754 -[_PFArray dealloc] + 100 (_PFArray.m:379)
2   libobjc.A.dylib                 0x000000020329b38c (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 676 (NSObject.mm:1605)
3   libdispatch.dylib               0x0000000203aea464 _dispatch_last_resort_autorelease_pool_pop + 40 (object.m:488)
4   libdispatch.dylib               0x0000000203accddc _dispatch_root_queue_drain + 1080 (queue.c:6049)
5   libdispatch.dylib               0x0000000203acd35c _dispatch_worker_thread2 + 116 (queue.c:6072)
6   libsystem_pthread.dylib         0x0000000203ccc17c _pthread_wqthread + 472 (pthread.c:2353)
7   libsystem_pthread.dylib         0x0000000203ccecec start_wqthread + 4

Thread 11:
0   libsystem_pthread.dylib         0x0000000203ccece8 start_wqthread + 0

Thread 10 crashed with ARM Thread State (64-bit):
    x0: 0x0000000280283bb0   x1: 0x00000002317c19b4   x2: 0x0000000000000001   x3: 0x0000000203c8019c
    x4: 0x000000014a514400   x5: 0x0000000000000012   x6: 0x000000023b9c4000   x7: 0x000000016b77e538
    x8: 0x0000000281685080   x9: 0x0000000000000000  x10: 0x0000000148860a00  x11: 0x0000002f0000003f
   x12: 0x0000000148860d40  x13: 0x0000a69f262e3bb0  x14: 0x000000000000004c  x15: 0x0000000080000000
   x16: 0x0000000f262e3bb0  x17: 0x0000000206c0f138  x18: 0x0000000000000000  x19: 0x0000000282fc8b70
   x20: 0x00000002317c19b4  x21: 0x000000000000000c  x22: 0x0000000000000020  x23: 0x0000000000000015
   x24: 0x0000000000000010  x25: 0x0000000000000000  x26: 0x0000000000000000  x27: 0x0000000000000000
   x28: 0x000000016b77f0e0   fp: 0x000000016b77ea80   lr: 0x0000000206c17754
    sp: 0x000000016b77ea40   pc: 0x0000000203298d70 cpsr: 0x20000000

应用程序委托(delegate)

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {

        GeoBasedManager.instance.setCountry()
        FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
        NotificationManager.shared.retrievePushNotifications()
        FirebaseApp.configure()
        SwiftDate.defaultRegion = Region.local
        DropDown.startListeningToKeyboard()

return true

Answer 1

线程 com.twitter.crashlytics.ios.MachExceptionServer 是 Crashlytics 报告机制的一部分。它出现在 Crashlytics 生成的每份报告中，并且与您的问题无关。

根据您的报告，Triggered by Thread: 10 表示哪个线程出现故障。由此，我们可以看到您已经获得了看起来像是经典的过度发布。

Thread 10 name:
Thread 10 Crashed:
0   libobjc.A.dylib                 0x0000000203298d70 objc_msgSend + 16
1   CoreData                        0x0000000206c17754 -[_PFArray dealloc] + 100 (_PFArray.m:379)
2   libobjc.A.dylib                 0x000000020329b38c (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 676 (NSObject.mm:1605)
3   libdispatch.dylib               0x0000000203aea464 _dispatch_last_resort_autorelease_pool_pop + 40 (object.m:488)
4   libdispatch.dylib               0x0000000203accddc _dispatch_root_queue_drain + 1080 (queue.c:6049)
5   libdispatch.dylib               0x0000000203acd35c _dispatch_worker_thread2 + 116 (queue.c:6072)
6   libsystem_pthread.dylib         0x0000000203ccc17c _pthread_wqthread + 472 (pthread.c:2353)
7   libsystem_pthread.dylib         0x0000000203ccecec start_wqthread + 4

从第 2 帧和第 3 帧中，您可以看到系统正在清理自动释放的对象，看起来像是内部调度队列。其中有一个对象已经被释放，但现在又被释放。

此类错误可能会以各种不同的崩溃形式表现出来。它们可能很难调试。正如您所看到的，很难确定实际的过度释放发生在哪里。幸运的是，Apple 提供了一些可以提供帮助的工具。查看 Instruments 的僵尸功能。祝你好运!