bt
#0  0x28153f7f in _pthread_cond_wait () from /usr/lib/libc_r.so.5
#1  0x2815407e in pthread_cond_wait () from /usr/lib/libc_r.so.5
#2  0x08069a7b in ast_cond_wait (cond=0x2, t=0x281586b4)
    at include/asterisk/lock.h:626
#3  0x2814750e in _thread_start () from /usr/lib/libc_r.so.5
#4  0xbf6df000 in ?? ()
(gdb) bt full
#0  0x28153f7f in _pthread_cond_wait () from /usr/lib/libc_r.so.5
No symbol table info available.
#1  0x2815407e in pthread_cond_wait () from /usr/lib/libc_r.so.5
No symbol table info available.
#2  0x08069a7b in ast_cond_wait (cond=0x2, t=0x281586b4)
    at include/asterisk/lock.h:626
No locals.
#3  0x2814750e in _thread_start () from /usr/lib/libc_r.so.5
No symbol table info available.
#4  0xbf6df000 in ?? ()
No symbol table info available.
(gdb) thread apply all bt

Thread 1 (process 95985):
#0  0x28153f7f in _pthread_cond_wait () from /usr/lib/libc_r.so.5
#1  0x2815407e in pthread_cond_wait () from /usr/lib/libc_r.so.5
#2  0x08069a7b in ast_cond_wait (cond=0x2, t=0x281586b4)
    at include/asterisk/lock.h:626
#3  0x2814750e in _thread_start () from /usr/lib/libc_r.so.5
#4  0xbf6df000 in ?? ()
(gdb)