Thread: pthreads - hanging process - gdb output

Got a hanging process (with code posted in http://cboard.cprogramming.com/showthread.php?t=51261).

attached to process pid and got the following backtrace:

Code:

(gdb) bt
#0  0x40188a35 in pthread_getconcurrency () from /lib/i686/libpthread.so.0
#1  0x40187db8 in pthread_create () from /lib/i686/libpthread.so.0
#2  0x4018a210 in sem_unlink () from /lib/i686/libpthread.so.0
#3  0x40186d77 in pthread_mutex_lock () from /lib/i686/libpthread.so.0
#4  0x420993d5 in adjtime () from /lib/i686/libc.so.6
#5  0x4209829e in localtime_r () from /lib/i686/libc.so.6
#6  0x420dfa86 in vsyslog () from /lib/i686/libc.so.6
#7  0x420df9af in syslog () from /lib/i686/libc.so.6
#8  0x08066312 in ouch ()
#9  0x4018b7ce in __pthread_clock_settime () from /lib/i686/libpthread.so.0
#10 0x42028518 in killpg () from /lib/i686/libc.so.6
#11 0x080660bc in main ()
#12 0x42015967 in __libc_start_main () from /lib/i686/libc.so.6
(gdb)

the ouch function is my signal handling function for INT, TERM and HUP signals.

Does anyone think this is a problem because I'm not limiting the number of threads? It's getting a lot of connections .

Could this be caused by PTHREAD_THREADS_MAX being reached ?

Does PTHREAD_THREADS_MAX apply if I'm detaching the threads with pthread_detach ?

Any suggestions to control short term until I get a thread pool up and running ?

Hang on - I just noticed it's in the syslog functions . Is syslog thread-safe I'm calling it in the signal handling function and in the main thread at the same time.

Cheers,

Chris