Subj : pthread_mutex_lock throws an exception on receiving signal 15
To   : comp.programming.threads
From : pankaj-startup
Date : Wed Sep 21 2005 03:08 am

When my C++ multithreaded application receives a signal 15, it results
into a core dump.
When application receives signal 15, some thread/code throws exception
(i could not find exact location of this code, even using gdb). This
exception is catched in main thread. On catch, when application tries
to log a message in log file, it tries to acquire a mutex by callling
pthread_mutex_lock. But this call (pthread_mutex_lock(m_mutex)) throws
another exception which is never being catched & results into core
dump.


What are thr possible causes to make pthread_mutex_lock throw
exception?
As per my knowledge, gdb doesn't show status of all threds, am i rt? I
tried using 'info threads'.

following is gdb backtrace:
#0  0xd0059790 in pthread_kill () from
/usr/lib/libpthreads.a(shr_xpg5.o)
#1  0xd0058da0 in _p_raise () from /usr/lib/libpthreads.a(shr_xpg5.o)
#2  0xd01d8e88 in raise () from /usr/lib/libc.a(shr.o)
#3  0xd01e7854 in abort () from /usr/lib/libc.a(shr.o)
#4  0xd09c192c in std::myabort () from /usr/lib/libC.a(ansi_32.o)
#5  0xd09bfe48 in std::terminate () from /usr/lib/libC.a(ansi_32.o)
#6  0xd09c1120 in terminate () from /usr/lib/libC.a(ansi_32.o)
#7  0x100c4e60 in __Invoke__Destructor ()
#8  0x100c49c4 in __DoThrow ()
#9  0x10135710 in PthreadMutex::lock ()

Note: PthreadMutex is a wrapper aroung pthread_mutex_t

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