C++ c++；pthreads-尝试锁定互斥对象以进行读取时崩溃_C++_Crash_Gdb_Pthreads_Mutex

C++ c++；pthreads-尝试锁定互斥对象以进行读取时崩溃

c++ gdb

C++ c++；pthreads-尝试锁定互斥对象以进行读取时崩溃,c++,crash,gdb,pthreads,mutex,C++,Crash,Gdb,Pthreads,Mutex,类LocalT具有实现读写互斥体的其他类的成员。在构造函数中初始化互斥体并使用pthread\u rwlock\u rdlock（&aMutex）用于读取锁。所以，看起来，使用互斥类就可以了。但当一些LocalT对象锁定其互斥体成员进行读取时，程序崩溃 CSerialize.cpp:2054行是MUTEX.lock_reading（）其他两个正在运行的线程： 1）在socketaccept（）处 2）在popen（）调用处的下一个可运行线程似乎是从管道执行或读取。但不知道什么是\uu er

类

LocalT

具有实现

读写互斥体的其他类的成员。在构造函数中初始化互斥体并使用pthread\u rwlock\u rdlock（&aMutex）用于读取锁。所以，看起来，使用互斥类就可以了。但当一些LocalT
对象锁定其互斥体成员进行读取时，程序崩溃
CSerialize.cpp:2054
行是MUTEX.lock_reading（）
其他两个正在运行的线程：
1） 在socketaccept（）处
2） 在popen（）
调用处的下一个可运行线程似乎是从管道执行或读取。但不知道什么是\uu error（）

Thread 1 (Thread 0x8614800 (LWP 100343)):
#0  0x4865b8f9 in __error () from /lib/libpthread.so.2
#1  0x4865a15a in pthread_testcancel () from /lib/libpthread.so.2
#2  0x486425bf in read () from /lib/libpthread.so.2
#3  0x08056340 in UT::execute_popen (command=@0x4865e6bc,
    ptr_output=0xbf2f7d30) at Utils.cpp:75

3） 所有其他线程都处于休眠状态
我不知道它为什么会坠毁？也许有人可以假设或建议
==编辑==
(gdb) bt
#0  0x4865a7db in pthread_testcancel () from /lib/libpthread.so.2
#1  0x48652412 in pthread_mutexattr_init () from /lib/libpthread.so.2
#2  0x489fd450 in ?? ()

Program terminated with signal 11, Segmentation fault.
[skiped]
#0  0x4865a7db in pthread_testcancel () from /lib/libpthread.so.2
[New Thread 0x8614800 (LWP 100343)]
[New Thread 0x8614600 (sleeping)]
[New Thread 0x8614400 (sleeping)]
[New Thread 0x8614200 (sleeping)]
[New Thread 0x8614000 (sleeping)]
[New Thread 0x80d4e00 (runnable)]
[New Thread 0x80d4c00 (sleeping)]
[New Thread 0x80d4a00 (LWP 100051)]
[New Thread 0x80d4000 (runnable)]
[New LWP 100802]

(gdb) info thread
* 10 LWP 100802  0x4865a7db in pthread_testcancel () from /lib/libpthread.so.2
  9 Thread 0x80d4000 (runnable)  0x486d7bd3 in accept () from /lib/libc.so.6 -- MAIN() THREAD
  8 Thread 0x80d4a00 (LWP 100051)  0x4865a79b in pthread_testcancel ()
   from /lib/libpthread.so.2 ( UNIDENTIFIED THREAD system()? ) 
  7 Thread 0x80d4c00 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (SIGNAL PROCESSOR THREAD)
  6 Thread 0x80d4e00 (runnable)  0x4864f11d in pthread_mutex_lock ()
   from /lib/libpthread.so.2 (MAINTENANCE THREAD)
  5 Thread 0x8614000 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 1)
  4 Thread 0x8614200 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 2 )
  3 Thread 0x8614400 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 3 )
  2 Thread 0x8614600 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 4)
  1 Thread 0x8614800 (LWP 100343)  0x4865b8f9 in __error ()
   from /lib/libpthread.so.2 ( popen() thread see below)

这里有一个系统（？）线程（我没有创建它，但程序总是有+1个线程）。它总是：
Thread 8 (Thread 0x80d4a00 (LWP 100051)):
#0  0x4865a79b in pthread_testcancel () from /lib/libpthread.so.2
#1  0x48652412 in pthread_mutexattr_init () from /lib/libpthread.so.2
#2  0x489fd450 in ?? ()

==EDIT2-bt根据请求==
(gdb) bt
#0  0x4865a7db in pthread_testcancel () from /lib/libpthread.so.2
#1  0x48652412 in pthread_mutexattr_init () from /lib/libpthread.so.2
#2  0x489fd450 in ?? ()

Program terminated with signal 11, Segmentation fault.
[skiped]
#0  0x4865a7db in pthread_testcancel () from /lib/libpthread.so.2
[New Thread 0x8614800 (LWP 100343)]
[New Thread 0x8614600 (sleeping)]
[New Thread 0x8614400 (sleeping)]
[New Thread 0x8614200 (sleeping)]
[New Thread 0x8614000 (sleeping)]
[New Thread 0x80d4e00 (runnable)]
[New Thread 0x80d4c00 (sleeping)]
[New Thread 0x80d4a00 (LWP 100051)]
[New Thread 0x80d4000 (runnable)]
[New LWP 100802]

(gdb) info thread
* 10 LWP 100802  0x4865a7db in pthread_testcancel () from /lib/libpthread.so.2
  9 Thread 0x80d4000 (runnable)  0x486d7bd3 in accept () from /lib/libc.so.6 -- MAIN() THREAD
  8 Thread 0x80d4a00 (LWP 100051)  0x4865a79b in pthread_testcancel ()
   from /lib/libpthread.so.2 ( UNIDENTIFIED THREAD system()? ) 
  7 Thread 0x80d4c00 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (SIGNAL PROCESSOR THREAD)
  6 Thread 0x80d4e00 (runnable)  0x4864f11d in pthread_mutex_lock ()
   from /lib/libpthread.so.2 (MAINTENANCE THREAD)
  5 Thread 0x8614000 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 1)
  4 Thread 0x8614200 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 2 )
  3 Thread 0x8614400 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 3 )
  2 Thread 0x8614600 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 4)
  1 Thread 0x8614800 (LWP 100343)  0x4865b8f9 in __error ()
   from /lib/libpthread.so.2 ( popen() thread see below)

奇怪的是。。。为什么？？（）

==EDIT3-加载核心时==
(gdb) bt
#0  0x4865a7db in pthread_testcancel () from /lib/libpthread.so.2
#1  0x48652412 in pthread_mutexattr_init () from /lib/libpthread.so.2
#2  0x489fd450 in ?? ()

Program terminated with signal 11, Segmentation fault.
[skiped]
#0  0x4865a7db in pthread_testcancel () from /lib/libpthread.so.2
[New Thread 0x8614800 (LWP 100343)]
[New Thread 0x8614600 (sleeping)]
[New Thread 0x8614400 (sleeping)]
[New Thread 0x8614200 (sleeping)]
[New Thread 0x8614000 (sleeping)]
[New Thread 0x80d4e00 (runnable)]
[New Thread 0x80d4c00 (sleeping)]
[New Thread 0x80d4a00 (LWP 100051)]
[New Thread 0x80d4000 (runnable)]
[New LWP 100802]

(gdb) info thread
* 10 LWP 100802  0x4865a7db in pthread_testcancel () from /lib/libpthread.so.2
  9 Thread 0x80d4000 (runnable)  0x486d7bd3 in accept () from /lib/libc.so.6 -- MAIN() THREAD
  8 Thread 0x80d4a00 (LWP 100051)  0x4865a79b in pthread_testcancel ()
   from /lib/libpthread.so.2 ( UNIDENTIFIED THREAD system()? ) 
  7 Thread 0x80d4c00 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (SIGNAL PROCESSOR THREAD)
  6 Thread 0x80d4e00 (runnable)  0x4864f11d in pthread_mutex_lock ()
   from /lib/libpthread.so.2 (MAINTENANCE THREAD)
  5 Thread 0x8614000 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 1)
  4 Thread 0x8614200 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 2 )
  3 Thread 0x8614400 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 3 )
  2 Thread 0x8614600 (sleeping)  0x48651cb6 in pthread_mutexattr_init ()
   from /lib/libpthread.so.2 (other mutex cond_wait - worker 4)
  1 Thread 0x8614800 (LWP 100343)  0x4865b8f9 in __error ()
   from /lib/libpthread.so.2 ( popen() thread see below)

我创建了：1个维护线程（序列化）、1个popen（）
线程、4个工作线程、1个主线程、1个信号线程=8个线程……
您称为系统线程的线程实际上是程序的主线程
第二，由于到目前为止您共享了信息，看起来您正在获取互斥锁，但从未释放过它。这会导致不稳定状态（某些参数的值错误），从而导致崩溃。我相信您也会观察到间歇性挂起
当它崩溃时，您能否共享回溯
 谢谢你的回答。1） 否，主线程处于accept（）
状态。可能它的信号线程位于sigwait（）
state2）我将尝试搜索使用此互斥锁的代码，但是。。。似乎没有，我总是专注于。。。3） 添加+一些附加信息。请执行info threads
，这将向您显示所有线程。如果我上面提到的关于不放弃锁的内容是真的，您将看到一堆线程在等待该互斥锁。“睡线”是工人。它们必须处于等待状态。正在等待来自主线程的信号。似乎您在这里遇到了更大的问题。似乎有很多线程试图在同一个互斥体上执行pthread\u mutexattr\u init（）
？难道不应该只有主线程才这样做吗？将此调用移动到main（）
函数