当通过 Xcode 或命令行运行我的测试套件时，我注意到测试会无缘无故地挂起。我不知道为什么测试会突然挂起。测试基本上将永远挂起，或者直到我停止它。我有大约 19 个应该运行的冗长测试，但它到达第 3 或第 4 或第 5 次测试，然后它只是随机停止。
顺便说一句，当我单独运行每个测试时，它们都会在执行单独测试时完全运行。
我希望测试只是出错，或者整个套件会爆炸，但这不会发生，而是我得到了一个永远持续的测试运行。请帮忙！我非常愿意为您提供日志，但不幸的是，我所拥有的只是对调试无用的仪器日志。
**编辑* * 这是评论中要求的示例：
Analysis of sampling instruments (pid 49112) every 1 millisecond
Process: instruments [49112]
Path: /Applications/Xcode.app/Contents/Developer/usr/bin/instruments
Load Address: 0x10ab3c000
Identifier: instruments
Version: $[MARKETING_VERSION] (51168)
Code Type: X86-64 (Native)
Parent Process: sh [47591]
Date/Time: 2013-12-03 15:24:05.120 -0800
OS Version: Mac OS X 10.8.5 (12F45)
Report Version: 7
Call graph:
9132 Thread_10178874 DispatchQueue_1: com.apple.main-thread (serial)
+ 9132 start (in libdyld.dylib) + 1 [0x7fff870e87e1]
+ 9132 ??? (in instruments) load address 0x10ab3c000 + 0x4736 [0x10ab40736]
+ 9132 ??? (in instruments) load address 0x10ab3c000 + 0x41a8 [0x10ab401a8]
+ 9132 -[NSRunLoop(NSRunLoop) runUntilDate:] (in Foundation) + 78 [0x7fff8209a69b]
+ 9132 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] (in Foundation) + 268 [0x7fff8209a7ee]
+ 9132 CFRunLoopRunSpecific (in CoreFoundation) + 290 [0x7fff83a670e2]
+ 9125 __CFRunLoopRun (in CoreFoundation) + 1078 [0x7fff83a67916]
+ ! 9125 __CFRunLoopServiceMachPort (in CoreFoundation) + 195 [0x7fff83a62233]
+ ! 9125 mach_msg (in libsystem_kernel.dylib) + 70 [0x7fff8a51dc42]
+ ! 9125 mach_msg_trap (in libsystem_kernel.dylib) + 10 [0x7fff8a51e686]
+ 4 __CFRunLoopRun (in CoreFoundation) + 1529 [0x7fff83a67ad9]
+ ! 3 __CFRunLoopDoTimer (in CoreFoundation) + 557 [0x7fff83a8231d]
+ ! : 3 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (in CoreFoundation) + 20 [0x7fff83a82804]
+ ! : 2 __NSFireTimer (in Foundation) + 96 [0x7fff82073463]
+ ! : | 1 -[XRTrace _runTimerTickFireMethod:] (in InstrumentsPlugIn) + 103 [0x10ab7829b]
+ ! : | + 1 -[__NSDictionaryM setObject:forKey:] (in CoreFoundation) + 359 [0x7fff83b54697]
+ ! : | + 1 calloc (in libsystem_c.dylib) + 0 [0x7fff8c083bf4]
+ ! : | 1 -[XRTrace _runTimerTickFireMethod:] (in InstrumentsPlugIn) + 172 [0x10ab782e0]
+ ! : | 1 -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation) + 64 [0x7fff820487b6]
+ ! : | 1 _CFXNotificationPost (in CoreFoundation) + 2554 [0x7fff83a77eda]
+ ! : | 1 -[XRInstrument _tick:] (in InstrumentsPlugIn) + 26 [0x10ab7831e]
+ ! : | 1 -[XRInstrument requiresTickNotification] (in InstrumentsPlugIn) + 1 [0x10ab9c823]
+ ! : 1 __NSFireTimer (in Foundation) + 135 [0x7fff8207348a]
+ ! : 1 _CFAutoreleasePoolPop (in CoreFoundation) + 34 [0x7fff83a62d72]
+ ! : 1 (anonymous namespace)::AutoreleasePoolPage::pop(void*) (in libobjc.A.dylib) + 464 [0x7fff858b0230]
+ ! : 1 -[__NSDictionaryM dealloc] (in CoreFoundation) + 286 [0x7fff83b554ee]
+ ! : 1 object_dispose (in libobjc.A.dylib) + 22 [0x7fff858affa0]
+ ! : 1 objc_destructInstance (in libobjc.A.dylib) + 121 [0x7fff858af940]
+ ! : 1 objc_clear_deallocating (in libobjc.A.dylib) + 151 [0x7fff858af9ee]
+ ! : 1 arr_clear_deallocating (in libobjc.A.dylib) + 31 [0x7fff858c60c4]
+ ! : 1 weak_entry_for_referent(weak_table_t*, objc_object*) (in libobjc.A.dylib) + 235 [0x7fff858c5f98]
+ ! 1 __CFRunLoopDoTimer (in CoreFoundation) + 501 [0x7fff83a822e5]
+ ! 1 mk_timer_arm (in libsystem_kernel.dylib) + 10 [0x7fff8a51e7b2]
+ 1 __CFRunLoopRun (in CoreFoundation) + 891 [0x7fff83a6785b]
+ ! 1 __CFRunLoopServiceMachPort (in CoreFoundation) + 195 [0x7fff83a62233]
+ ! 1 mach_msg (in libsystem_kernel.dylib) + 70 [0x7fff8a51dc42]
+ ! 1 mach_msg_trap (in libsystem_kernel.dylib) + 10 [0x7fff8a51e686]
+ 1 __CFRunLoopRun (in CoreFoundation) + 1186 [0x7fff83a67982]
+ ! 1 __CFRunLoopDoObservers (in CoreFoundation) + 48 [0x7fff83a8c240]
+ 1 __CFRunLoopRun (in CoreFoundation) + 1400 [0x7fff83a67a58]
+ 1 CFArrayAppendValue (in CoreFoundation) + 91 [0x7fff83a40e6b]
+ 1 -[__NSArrayM insertObject:atIndex:] (in CoreFoundation) + 728 [0x7fff83a76438]
+ 1 __bzero (in libsystem_c.dylib) + 0 [0x7fff8c0571a3]
9132 Thread_10178896 DispatchQueue_2: com.apple.libdispatch-manager (serial)
+ 9132 _dispatch_mgr_thread (in libdispatch.dylib) + 54 [0x7fff843019ee]
+ 9128 _dispatch_mgr_invoke (in libdispatch.dylib) + 883 [0x7fff84301dea]
+ ! 9128 kevent (in libsystem_kernel.dylib) + 10 [0x7fff8a520d16]
+ 3 _dispatch_mgr_invoke (in libdispatch.dylib) + 885 [0x7fff84301dec]
+ 1 _dispatch_mgr_invoke (in libdispatch.dylib) + 144 [0x7fff84301b07]
+ 1 _dispatch_run_timers (in libdispatch.dylib) + 306 [0x7fff84301f71]
+ 1 _dispatch_wakeup (in libdispatch.dylib) + 106 [0x7fff842ffeb3]
9132 Thread_10178898 DispatchQueue_184: parsing queue (serial)
+ 9132 start_wqthread (in libsystem_c.dylib) + 13 [0x7fff8c057191]
+ 9132 _pthread_wqthread (in libsystem_c.dylib) + 404 [0x7fff8c06ccdb]
+ 9132 _dispatch_worker_thread2 (in libdispatch.dylib) + 249 [0x7fff843001c3]
+ 9132 _dispatch_queue_invoke (in libdispatch.dylib) + 52 [0x7fff843002f1]
+ 9132 _dispatch_queue_drain (in libdispatch.dylib) + 235 [0x7fff8430047f]
+ 9132 _dispatch_client_callout (in libdispatch.dylib) + 8 [0x7fff842ff0b6]
+ 9132 _dispatch_call_block_and_release (in libdispatch.dylib) + 15 [0x7fff84302f01]
+ 9132 __43-[DTXMessageParser initWithMessageHandler:]_block_invoke (in DTXConnectionServices) + 35 [0x10b13fb36]
+ 9132 -[DTXMessageParser parseMessage] (in DTXConnectionServices) + 51 [0x10b13fd79]
+ 9132 -[DTXMessageParser waitForMoreData:incrementalBuffer:] (in DTXConnectionServices) + 87 [0x10b14012a]
+ 9132 _dispatch_semaphore_wait_slow (in libdispatch.dylib) + 241 [0x7fff84302486]
+ 9132 semaphore_wait_trap (in libsystem_kernel.dylib) + 10 [0x7fff8a51e6c2]
9132 Thread_10178984: com.apple.CFSocket.private
+ 9132 thread_start (in libsystem_c.dylib) + 13 [0x7fff8c0571a1]
+ 9132 _pthread_start (in libsystem_c.dylib) + 327 [0x7fff8c06a772]
+ 9132 __CFSocketManager (in CoreFoundation) + 1302 [0x7fff83aa6f46]
+ 9132 __select (in libsystem_kernel.dylib) + 10 [0x7fff8a520322]
9132 Thread_10179054
+ 9132 start_wqthread (in libsystem_c.dylib) + 13 [0x7fff8c057191]
+ 9132 _pthread_wqthread (in libsystem_c.dylib) + 412 [0x7fff8c06cce3]
+ 9132 _pthread_workq_return (in libsystem_c.dylib) + 25 [0x7fff8c06cf1c]
+ 9132 __workq_kernreturn (in libsystem_kernel.dylib) + 10 [0x7fff8a5206d6]
9131 Thread_10184560
+ 9131 start_wqthread (in libsystem_c.dylib) + 13 [0x7fff8c057191]
+ 9131 _pthread_wqthread (in libsystem_c.dylib) + 412 [0x7fff8c06cce3]
+ 9131 _pthread_workq_return (in libsystem_c.dylib) + 25 [0x7fff8c06cf1c]
+ 9131 __workq_kernreturn (in libsystem_kernel.dylib) + 10 [0x7fff8a5206d6]
1 Thread_10184560 DispatchQueue_9: com.apple.root.high-overcommit-priority (concurrent)
1 start_wqthread (in libsystem_c.dylib) + 13 [0x7fff8c057191]
1 _pthread_wqthread (in libsystem_c.dylib) + 404 [0x7fff8c06ccdb]
1 _dispatch_worker_thread2 (in libdispatch.dylib) + 249 [0x7fff843001c3]
1 _dispatch_queue_invoke (in libdispatch.dylib) + 72 [0x7fff84300305]
1 _dispatch_source_invoke (in libdispatch.dylib) + 460 [0x7fff843011b4]
1 _dispatch_client_callout (in libdispatch.dylib) + 8 [0x7fff842ff0b6]
1 __CFRunLoopTimeoutCancel (in CoreFoundation) + 18 [0x7fff83ab4cf2]
1 CFRelease (in CoreFoundation) + 175 [0x7fff83a3b28f]
Total number in stack (recursive counted multiple, when >=5):
Sort by top of stack, same collapsed (when >= 5):
__workq_kernreturn (in libsystem_kernel.dylib) 18263
__select (in libsystem_kernel.dylib) 9132
semaphore_wait_trap (in libsystem_kernel.dylib) 9132
kevent (in libsystem_kernel.dylib) 9128
mach_msg_trap (in libsystem_kernel.dylib) 9126