我的应用程序有一些CFRunLoopServiceMachPort崩溃。我一直试图弄清楚这个的根本原因。
我在后台线程中有一些任务要避免主线程拥塞。我想这可能是其中的一部分。
说实话，我无法理解我的问题在哪里。
以下是我的崩溃日志：
CrashReporter Key: b221bb6de8d8fdef7ea28e06270c15e1f055a7c7
Hardware Model: iPhone10,6
Process: MyApp [447]
Path: /private/var/containers/Bundle/Application/A3EE5740-4D42-4A91-A193-0C0212092D5F/MyApp.app/MyApp
Identifier: com.MyApp.MyAppphotos
Version: 1 (2.0.3)
Code Type: ARM-64 (Native)
Role: Foreground
Parent Process: launchd [1]
Coalition: com.MyApp.MyAppphotos [545]
Date/Time: 2018-01-11 16:25:27.9335 -0300
Launch Time: 2018-01-11 16:24:22.4630 -0300
OS Version: iPhone OS 11.2.5 (15D5057a)
Baseband Version: 1.03.06
Report Version: 104
Exception Type: EXC_CRASH (SIGSEGV)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: MyApp [447]
Triggered by Thread: 0
Thread 0 name:
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x000000018257f568 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x000000018257f3e0 mach_msg + 72 (mach_msg.c:103)
2 CoreFoundation 0x0000000182a33108 __CFRunLoopServiceMachPort + 196 (CFRunLoop.c:2613)
3 CoreFoundation 0x0000000182a30cd4 __CFRunLoopRun + 1424 (CFRunLoop.c:2969)
4 CoreFoundation 0x0000000182950c58 CFRunLoopRunSpecific + 436 (CFRunLoop.c:3245)
5 GraphicsServices 0x00000001847faf84 GSEventRunModal + 100 (GSEvent.c:2245)
6 UIKit 0x000000018c0a6804 UIApplicationMain + 236 (UIApplication.m:3956)
7 MyApp 0x000000010095e0cc main + 172 (main.m:16)
8 libdyld.dylib 0x000000018247056c start + 4
Thread 1 name:
Thread 1:
0 libsystem_kernel.dylib 0x00000001825a17c4 kevent_id + 8
1 libdispatch.dylib 0x0000000182454e4c _dispatch_kq_poll + 208 (event_kevent.c:644)
2 libdispatch.dylib 0x000000018245583c _dispatch_event_loop_wait_for_ownership$VARIANT$armv81 + 432 (event_kevent.c:2009)
3 libdispatch.dylib 0x000000018244d098 _dispatch_sync_wait + 420 (queue.c:4197)
4 CoreData 0x00000001852ecb4c -[NSManagedObjectContext performBlockAndWait:] + 304 (NSManagedObjectContext.m:3714)
5 PhotoLibraryServices 0x00000001904da010 -[PLPhotoLibrary(MegaMocAdditions) _withDispatchGroup:synchronously:priority:name:shouldSave:performTransaction:completionHandler:] + 368 (PLPhotoLibrary+MegaMocAdditions.m:581)
6 PhotoLibraryServices 0x00000001904d9a24 -[PLPhotoLibrary(MegaMocAdditions) performBlockAndWait:] + 80 (PLPhotoLibrary+MegaMocAdditions.m:314)
7 Photos 0x0000000191208da0 +[PHAsset originalUniformTypeIdentifierForAsset:] + 196 (PHAsset.m:2605)
8 Photos 0x000000019116d760 -[PHInternalAssetResource _populateFromAsset:] + 176 (PHInternalAssetResource.m:84)
9 Photos 0x000000019116e714 -[PHInternalAssetResource initWithResourceType:fromAsset:managedAsset:] + 644 (PHInternalAssetResource.m:271)
10 Photos 0x000000019116ef90 +[PHInternalAssetResource resourceForType:fromAsset:managedAsset:] + 104 (PHInternalAssetResource.m:359)
11 Photos 0x00000001911633a8 __61+[PHAssetResource assetResourcesForAsset:includeDerivatives:]_block_invoke_3 + 48 (PHAssetResource.m:98)
12 Photos 0x000000019118ebe8 PHEnumerateAssetResourceTypes + 44 (PHAssetResourceUtilities.m:100)
13 Photos 0x0000000191163294 __61+[PHAssetResource assetResourcesForAsset:includeDerivatives:]_block_invoke + 640 (PHAssetResource.m:97)
14 PhotoLibraryServices 0x00000001904da110 __131-[PLPhotoLibrary(MegaMocAdditions) _withDispatchGroup:synchronously:priority:name:shouldSave:performTransaction:completionHandler:]_block_invoke + 128 (PLPhotoLibrary+MegaMocAdditions.m:476)
15 CoreData 0x00000001852ecc48 developerSubmittedBlockToNSManagedObjectContextPerform + 156 (NSManagedObjectContext.m:3593)
16 libdispatch.dylib 0x000000018240aa14 _dispatch_client_callout + 16 (object.m:502)
17 libdispatch.dylib 0x000000018244d5ec _dispatch_sync_invoke_and_complete_recurse + 64 (queue.c:3689)
18 libdispatch.dylib 0x000000018244d0f8 _dispatch_sync_wait + 516 (queue.c:4208)
19 CoreData 0x00000001852ecb4c -[NSManagedObjectContext performBlockAndWait:] + 304 (NSManagedObjectContext.m:3714)
20 PhotoLibraryServices 0x00000001904da010 -[PLPhotoLibrary(MegaMocAdditions) _withDispatchGroup:synchronously:priority:name:shouldSave:performTransaction:completionHandler:] + 368 (PLPhotoLibrary+MegaMocAdditions.m:581)
21 PhotoLibraryServices 0x00000001904d9a24 -[PLPhotoLibrary(MegaMocAdditions) performBlockAndWait:] + 80 (PLPhotoLibrary+MegaMocAdditions.m:314)
22 Photos 0x0000000191162fb4 +[PHAssetResource assetResourcesForAsset:includeDerivatives:] + 276 (PHAssetResource.m:75)
23 MyApp 0x000000010093ca58 -[SharedData updateMediaObjectsToVideoFromLivePhotos:] + 808 (SharedData.m:342)
24 MyApp 0x000000010093be30 __30-[SharedData albumsPopulated:]_block_invoke_2 + 60 (SharedData.m:265)
25 libdispatch.dylib 0x000000018240aa54 _dispatch_call_block_and_release + 24 (init.c:994)
26 libdispatch.dylib 0x000000018240aa14 _dispatch_client_callout + 16 (object.m:502)
27 libdispatch.dylib 0x0000000182446394 _dispatch_queue_override_invoke$VARIANT$armv81 + 700 (inline_internal.h:2500)
28 libdispatch.dylib 0x000000018244c2a4 _dispatch_root_queue_drain + 568 (inline_internal.h:2539)
29 libdispatch.dylib 0x000000018244c008 _dispatch_worker_thread3 + 112 (queue.c:6104)
30 libsystem_pthread.dylib 0x00000001826b306c _pthread_wqthread + 1268 (pthread.c:2286)
31 libsystem_pthread.dylib 0x00000001826b2b6c start_wqthread + 4
Thread 2 name:
Thread 2:
0 libsystem_kernel.dylib 0x000000018257f568 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x000000018257f3e0 mach_msg + 72 (mach_msg.c:103)
2 CoreFoundation 0x0000000182a33108 __CFRunLoopServiceMachPort + 196 (CFRunLoop.c:2613)
3 CoreFoundation 0x0000000182a30cd4 __CFRunLoopRun + 1424 (CFRunLoop.c:2969)
4 CoreFoundation 0x0000000182950c58 CFRunLoopRunSpecific + 436 (CFRunLoop.c:3245)
5 Foundation 0x0000000183385594 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304 (NSRunLoop.m:367)
6 Foundation 0x00000001833a49ac -[NSRunLoop(NSRunLoop) runUntilDate:] + 96 (NSRunLoop.m:411)
7 UIKit 0x000000018cc107d8 -[UIEventFetcher threadMain] + 136 (UIEventFetcher.m:437)
8 Foundation 0x00000001834870f4 __NSThread__start__ + 996 (NSThread.m:1181)
9 libsystem_pthread.dylib 0x00000001826b42b4 _pthread_body + 308 (pthread.c:740)
10 libsystem_pthread.dylib 0x00000001826b4180 _pthread_start + 312 (pthread.c:799)
11 libsystem_pthread.dylib 0x00000001826b2b74 thread_start + 4
Thread 3 name:
Thread 3:
0 libsystem_kernel.dylib 0x00000001825a17c4 kevent_id + 8
1 libdispatch.dylib 0x0000000182454e4c _dispatch_kq_poll + 208 (event_kevent.c:644)
2 libdispatch.dylib 0x000000018245583c _dispatch_event_loop_wait_for_ownership$VARIANT$armv81 + 432 (event_kevent.c:2009)
3 libdispatch.dylib 0x000000018244d098 _dispatch_sync_wait + 420 (queue.c:4197)
4 CoreData 0x00000001852ecb4c -[NSManagedObjectContext performBlockAndWait:] + 304 (NSManagedObjectContext.m:3714)
5 PhotoLibraryServices 0x00000001904da010 -[PLPhotoLibrary(MegaMocAdditions) _withDispatchGroup:synchronously:priority:name:shouldSave:performTransaction:completionHandler:] + 368 (PLPhotoLibrary+MegaMocAdditions.m:581)
6 PhotoLibraryServices 0x00000001904d9a24 -[PLPhotoLibrary(MegaMocAdditions) performBlockAndWait:] + 80 (PLPhotoLibrary+MegaMocAdditions.m:314)
7 Photos 0x0000000191162fb4 +[PHAssetResource assetResourcesForAsset:includeDerivatives:] + 276 (PHAssetResource.m:75)
8 MyApp 0x000000010093ca58 -[SharedData updateMediaObjectsToVideoFromLivePhotos:] + 808 (SharedData.m:342)
9 MyApp 0x000000010093be30 __30-[SharedData albumsPopulated:]_block_invoke_2 + 60 (SharedData.m:265)
10 libdispatch.dylib 0x000000018240aa54 _dispatch_call_block_and_release + 24 (init.c:994)
11 libdispatch.dylib 0x000000018240aa14 _dispatch_client_callout + 16 (object.m:502)
12 libdispatch.dylib 0x0000000182446394 _dispatch_queue_override_invoke$VARIANT$armv81 + 700 (inline_internal.h:2500)
13 libdispatch.dylib 0x000000018244c2a4 _dispatch_root_queue_drain + 568 (inline_internal.h:2539)
14 libdispatch.dylib 0x000000018244c008 _dispatch_worker_thread3 + 112 (queue.c:6104)
15 libsystem_pthread.dylib 0x00000001826b306c _pthread_wqthread + 1268 (pthread.c:2286)
16 libsystem_pthread.dylib 0x00000001826b2b6c start_wqthread + 4
Thread 4 name:
Thread 4:
0 libsystem_kernel.dylib 0x00000001825a17c4 kevent_id + 8
1 libdispatch.dylib 0x0000000182454e4c _dispatch_kq_poll + 208 (event_kevent.c:644)
2 libdispatch.dylib 0x000000018245583c _dispatch_event_loop_wait_for_ownership$VARIANT$armv81 + 432 (event_kevent.c:2009)
3 libdispatch.dylib 0x000000018244d098 _dispatch_sync_wait + 420 (queue.c:4197)
4 CoreData 0x00000001852ecb4c -[NSManagedObjectContext performBlockAndWait:] + 304 (NSManagedObjectContext.m:3714)
5 PhotoLibraryServices 0x00000001904da010 -[PLPhotoLibrary(MegaMocAdditions) _withDispatchGroup:synchronously:priority:name:shouldSave:performTransaction:completionHandler:] + 368 (PLPhotoLibrary+MegaMocAdditions.m:581)
6 PhotoLibraryServices 0x00000001904d9a24 -[PLPhotoLibrary(MegaMocAdditions) performBlockAndWait:] + 80 (PLPhotoLibrary+MegaMocAdditions.m:314)
7 Photos 0x0000000191162fb4 +[PHAssetResource assetResourcesForAsset:includeDerivatives:] + 276 (PHAssetResource.m:75)
8 MyApp 0x000000010093ca58 -[SharedData updateMediaObjectsToVideoFromLivePhotos:] + 808 (SharedData.m:342)
9 MyApp 0x000000010093be30 __30-[SharedData albumsPopulated:]_block_invoke_2 + 60 (SharedData.m:265)
10 libdispatch.dylib 0x000000018240aa54 _dispatch_call_block_and_release + 24 (init.c:994)
11 libdispatch.dylib 0x000000018240aa14 _dispatch_client_callout + 16 (object.m:502)
12 libdispatch.dylib 0x0000000182446394 _dispatch_queue_override_invoke$VARIANT$armv81 + 700 (inline_internal.h:2500)
13 libdispatch.dylib 0x000000018244c2a4 _dispatch_root_queue_drain + 568 (inline_internal.h:2539)
14 libdispatch.dylib 0x000000018244c008 _dispatch_worker_thread3 + 112 (queue.c:6104)
15 libsystem_pthread.dylib 0x00000001826b306c _pthread_wqthread + 1268 (pthread.c:2286)
16 libsystem_pthread.dylib 0x00000001826b2b6c start_wqthread + 4
Thread 5 name:
Thread 5:
0 libsystem_kernel.dylib 0x00000001825a17c4 kevent_id + 8
1 libdispatch.dylib 0x0000000182454e4c _dispatch_kq_poll + 208 (event_kevent.c:644)
2 libdispatch.dylib 0x000000018245583c _dispatch_event_loop_wait_for_ownership$VARIANT$armv81 + 432 (event_kevent.c:2009)
3 libdispatch.dylib 0x000000018244d098 _dispatch_sync_wait + 420 (queue.c:4197)
4 CoreData 0x00000001852ecb4c -[NSManagedObjectContext performBlockAndWait:] + 304 (NSManagedObjectContext.m:3714)
5 PhotoLibraryServices 0x00000001904da010 -[PLPhotoLibrary(MegaMocAdditions) _withDispatchGroup:synchronously:priority:name:shouldSave:performTransaction:completionHandler:] + 368 (PLPhotoLibrary+MegaMocAdditions.m:581)
6 PhotoLibraryServices 0x00000001904d9a24 -[PLPhotoLibrary(MegaMocAdditions) performBlockAndWait:] + 80 (PLPhotoLibrary+MegaMocAdditions.m:314)
7 Photos 0x0000000191162fb4 +[PHAssetResource assetResourcesForAsset:includeDerivatives:] + 276 (PHAssetResource.m:75)
8 MyApp 0x000000010093ca58 -[SharedData updateMediaObjectsToVideoFromLivePhotos:] + 808 (SharedData.m:342)
9 MyApp 0x000000010093be30 __30-[SharedData albumsPopulated:]_block_invoke_2 + 60 (SharedData.m:265)
10 libdispatch.dylib 0x000000018240aa54 _dispatch_call_block_and_release + 24 (init.c:994)
11 libdispatch.dylib 0x000000018240aa14 _dispatch_client_callout + 16 (object.m:502)
12 libdispatch.dylib 0x0000000182446394 _dispatch_queue_override_invoke$VARIANT$armv81 + 700 (inline_internal.h:2500)
13 libdispatch.dylib 0x000000018244c2a4 _dispatch_root_queue_drain + 568 (inline_internal.h:2539)
14 libdispatch.dylib 0x000000018244c008 _dispatch_worker_thread3 + 112 (queue.c:6104)
15 libsystem_pthread.dylib 0x00000001826b306c _pthread_wqthread + 1268 (pthread.c:2286)
16 libsystem_pthread.dylib 0x00000001826b2b6c start_wqthread + 4
Thread 6 name:
Thread 6:
0 libsystem_kernel.dylib 0x000000018257f568 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x000000018257f3e0 mach_msg + 72 (mach_msg.c:103)
2 CoreFoundation 0x0000000182a33108 __CFRunLoopServiceMachPort + 196 (CFRunLoop.c:2613)
3 CoreFoundation 0x0000000182a30cd4 __CFRunLoopRun + 1424 (CFRunLoop.c:2969)
4 CoreFoundation 0x0000000182950c58 CFRunLoopRunSpecific + 436 (CFRunLoop.c:3245)
5 CoreFoundation 0x000000018299fd54 CFRunLoopRun + 116 (CFRunLoop.c:3269)
6 CoreMotion 0x0000000187dbf0e8 CLMotionCore::runMotionThread(void*) + 952 (CLMotionCore.mm:316)
7 libsystem_pthread.dylib 0x00000001826b42b4 _pthread_body + 308 (pthread.c:740)
8 libsystem_pthread.dylib 0x00000001826b4180 _pthread_start + 312 (pthread.c:799)
9 libsystem_pthread.dylib 0x00000001826b2b74 thread_start + 4
Thread 7 name:
Thread 7:
0 libsystem_kernel.dylib 0x000000018257f568 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x000000018257f3e0 mach_msg + 72 (mach_msg.c:103)
2 MyApp 0x0000000100f6e2ec CLSMachExceptionServer + 100
3 libsystem_pthread.dylib 0x00000001826b42b4 _pthread_body + 308 (pthread.c:740)
4 libsystem_pthread.dylib 0x00000001826b4180 _pthread_start + 312 (pthread.c:799)
5 libsystem_pthread.dylib 0x00000001826b2b74 thread_start + 4
Thread 8 name:
Thread 8:
0 libsystem_kernel.dylib 0x00000001825a17c4 kevent_id + 8
1 libdispatch.dylib 0x0000000182454e4c _dispatch_kq_poll + 208 (event_kevent.c:644)
2 libdispatch.dylib 0x000000018245583c _dispatch_event_loop_wait_for_ownership$VARIANT$armv81 + 432 (event_kevent.c:2009)
3 libdispatch.dylib 0x000000018244d098 _dispatch_sync_wait + 420 (queue.c:4197)
4 CoreData 0x00000001852ecb4c -[NSManagedObjectContext performBlockAndWait:] + 304 (NSManagedObjectContext.m:3714)
5 PhotoLibraryServices 0x00000001904da010 -[PLPhotoLibrary(MegaMocAdditions) _withDispatchGroup:synchronously:priority:name:shouldSave:performTransaction:completionHandler:] + 368 (PLPhotoLibrary+MegaMocAdditions.m:581)
6 PhotoLibraryServices 0x00000001904d9a24 -[PLPhotoLibrary(MegaMocAdditions) performBlockAndWait:] + 80 (PLPhotoLibrary+MegaMocAdditions.m:314)
7 Photos 0x0000000191162fb4 +[PHAssetResource assetResourcesForAsset:includeDerivatives:] + 276 (PHAssetResource.m:75)
8 MyApp 0x000000010093ca58 -[SharedData updateMediaObjectsToVideoFromLivePhotos:] + 808 (SharedData.m:342)
9 MyApp 0x000000010093be30 __30-[SharedData albumsPopulated:]_block_invoke_2 + 60 (SharedData.m:265)
10 libdispatch.dylib 0x000000018240aa54 _dispatch_call_block_and_release + 24 (init.c:994)
11 libdispatch.dylib 0x000000018240aa14 _dispatch_client_callout + 16 (object.m:502)
12 libdispatch.dylib 0x0000000182446394 _dispatch_queue_override_invoke$VARIANT$armv81 + 700 (inline_internal.h:2500)
13 libdispatch.dylib 0x000000018244c2a4 _dispatch_root_queue_drain + 568 (inline_internal.h:2539)
14 libdispatch.dylib 0x000000018244c008 _dispatch_worker_thread3 + 112 (queue.c:6104)
15 libsystem_pthread.dylib 0x00000001826b306c _pthread_wqthread + 1268 (pthread.c:2286)
16 libsystem_pthread.dylib 0x00000001826b2b6c start_wqthread + 4
Thread 9 name:
Thread 9:
0 libsystem_kernel.dylib 0x00000001825817d0 stat + 8
1 CFNetwork 0x00000001831880ec DiskCookieStorage::syncStorageWithCompletionLocked(unsigned char, void () block_pointer) + 2200 (FilePath_Mac.h:53)
2 CFNetwork 0x0000000183181984 HTTPCookieStorage::syncStorageWithCompletion(unsigned char, void () block_pointer) + 140 (PrivateHTTPCookieStorage.h:99)
3 CFNetwork 0x0000000183181878 HTTPCookieStorage::_syncTimerFired(__CFRunLoopTimer*, void*) + 120 (HTTPCookieStorage.cpp:1177)
4 CoreFoundation 0x0000000182a33dc0 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 28 (CFRunLoop.c:1832)
5 CoreFoundation 0x0000000182a33ae4 __CFRunLoopDoTimer + 864 (CFRunLoop.c:2415)
6 CoreFoundation 0x0000000182a332e4 __CFRunLoopDoTimers + 248 (CFRunLoop.c:2562)
7 CoreFoundation 0x0000000182a30ecc __CFRunLoopRun + 1928 (CFRunLoop.c:3083)
8 CoreFoundation 0x0000000182950c58 CFRunLoopRunSpecific + 436 (CFRunLoop.c:3245)
9 CFNetwork 0x000000018323fb08 -[__CoreSchedulingSetRunnable runForever] + 780 (CoreSchedulingSet.mm:1364)
10 Foundation 0x00000001834870f4 __NSThread__start__ + 996 (NSThread.m:1181)
11 libsystem_pthread.dylib 0x00000001826b42b4 _pthread_body + 308 (pthread.c:740)
12 libsystem_pthread.dylib 0x00000001826b4180 _pthread_start + 312 (pthread.c:799)
13 libsystem_pthread.dylib 0x00000001826b2b74 thread_start + 4
Thread 0 crashed with ARM Thread State (64-bit):
x0: 0x0000000010004005 x1: 0x0000000007000806 x2: 0x0000000000000000 x3: 0x0000000000000c00
x4: 0x0000000000002103 x5: 0x00000000ffffffff x6: 0x0000000000000000 x7: 0x00000000001b4069
x8: 0x00000000fffffbbf x9: 0x0000000007000000 x10: 0x0000000007000100 x11: 0x0000000000000040
x12: 0xffffffffffffffff x13: 0x0000000000000001 x14: 0x005fb300005fb300 x15: 0x0000000000000000
x16: 0xffffffffffffffe1 x17: 0x00000000ffffffff x18: 0xfffffff01c4dd260 x19: 0x0000000000000000
x20: 0x00000000ffffffff x21: 0x0000000000002103 x22: 0x0000000000000c00 x23: 0x000000016f69ed18
x24: 0x0000000007000806 x25: 0x0000000000000000 x26: 0x0000000007000806 x27: 0x0000000000000c00
x28: 0x0000000000000001 fp: 0x000000016f69ec10 lr: 0x000000018257f3e0
sp: 0x000000016f69ebc0 pc: 0x000000018257f568 cpsr: 0x60000000
答案 0 :(得分：0)
似乎问题是多个嵌套枚举块被用来一次又一次地进行大量处理。改变整个逻辑和实施方法解决了这个问题。