(gdb) bt full
#0 0x2825f52b in pthread_testcancel () from /usr/lib/libpthread.so.2
No symbol table info available.
#1 0x2824cb75 in sigaction () from /usr/lib/libpthread.so.2
No symbol table info available.
#2 0x2824ce61 in sigaction () from /usr/lib/libpthread.so.2
No symbol table info available.
#3 0x2824d640 in sigaction () from /usr/lib/libpthread.so.2
No symbol table info available.
#4 0x2824d7ec in sigaction () from /usr/lib/libpthread.so.2
No symbol table info available.
#5 0x28257e3c in pthread_mutexattr_init () from /usr/lib/libpthread.so.2
No symbol table info available.
#6 0x2821d460 in ?? ()
No symbol table info available.