(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.