(gdb) bt full
#0  0x28b87537 in pthread_testcancel () from /lib/libpthread.so.2
No symbol table info available.
#1  0x28b7fec8 in pthread_mutexattr_init () from /lib/libpthread.so.2
No symbol table info available.
#2  0x29055450 in ?? ()
No symbol table info available.
(gdb)