我正在开发一个音频播放器到Mac环境的端口。它在windows下运行良好,但在Mac上不行。当我用播放器播放音乐时,我遇到了一个不可预知的死锁,我能得到的唯一信息就是转储挂起进程的线程堆栈。这是我得到的调用堆栈:
Sampling process 1808 for 1 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling Python (pid 1808) every 1 millisecond
Call graph:
785 Thread_32664 DispatchQueue_1: com.apple.main-thread (serial)
785 0x1ea9
785 0x1f82
785 Py_Main
785 PyRun_SimpleFileExFlags
785 PyRun_FileExFlags
785 PyEval_EvalCode
785 PyEval_EvalCodeEx
785 PyEval_EvalFrameEx
785 time_sleep
785 select
785 select$DARWIN_EXTSN$NOCANCEL
785 Thread_32672 DispatchQueue_2: com.apple.libdispatch-manager (serial)
785 start_wqthread
785 _pthread_wqthread
785 _dispatch_worker_thread2
785 _dispatch_queue_invoke
785 _dispatch_mgr_invoke
785 kevent
785 Thread_32679
785 thread_start
785 _pthread_start
785 CAPThread::Entry(CAPThread*)
785 HP_IOThread::ThreadEntry(HP_IOThread*)
785 HP_IOThread::WorkLoop()
785 HP_IOThread::PerformIO(AudioTimeStamp const&, double)
785 IOA_Device::CallIOProcs(AudioTimeStamp const&, AudioTimeStamp const&, AudioTimeStamp const&)
785 HP_IOProc::Call(AudioTimeStamp const&, AudioTimeStamp const&, AudioBufferList const*, AudioTimeStamp const&, AudioBufferList*)
785 BASS_ChannelIsSliding
785 MPEnterCriticalRegion
785 TSWaitOnConditionTimedRelative
785 TSWaitOnCondition
785 pthread_cond_wait$UNIX2003
785 _pthread_cond_wait
785 __semwait_signal
785 Thread_32680
785 0xa4fffad
785 dict_repr
785 0x1307ccd
785 MPEnterCriticalRegion
785 TSWaitOnConditionTimedRelative
785 TSWaitOnCondition
785 pthread_cond_wait$UNIX2003
785 _pthread_cond_wait
785 __semwait_signal
785 Thread_32681
785 MPEnterCriticalRegion
785 TSWaitOnConditionTimedRelative
785 TSWaitOnCondition
785 pthread_cond_wait$UNIX2003
785 _pthread_cond_wait
785 __semwait_signal
785 Thread_36905
785 start_wqthread
785 _pthread_wqthread
785 __workq_kernreturn
Total number in stack (recursive counted multiple, when >=5):
Sort by top of stack, same collapsed (when >= 5):
__semwait_signal 2355
__workq_kernreturn 785
kevent 785
select$DARWIN_EXTSN$NOCANCEL 785
Sample analysis of process 1808 written to file /dev/stdout
我只能知道一些线程正在等待其他线程,但我不知道它们是什么锁,谁在等待。我的问题来了,如何在Mac环境下调试死锁?在
调试多线程应用程序本身就很困难。一个简单的(可能也是非常简单的)方法是将要抓取/阻止/释放事件的所有锁写入日志文件。没有什么特别是OSX,但我已经用它来解决类似的问题。在
相关问题 更多 >
编程相关推荐