#0  0xb7874129 in __gnu_cxx::__exchange_and_add ()
   from /usr/lib/libstdc++.so.6
#1  0x0809393d in ?? ()
#2  0x0805d934 in ?? ()
#3  0x080d96e3 in ?? ()
#4  0x0811518d in ?? ()
#5  0x0811a7ae in ?? ()
#6  0x0808474f in ?? ()
#7  0x08085501 in ?? ()
#8  0x080c1ba7 in ?? ()
#9  0x080c16ce in ?? ()
#10 0x080c18da in ?? ()
#11 0x0807aef3 in ?? ()
#12 0x0807b0c3 in ?? ()
#13 0xb765c050 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#14 0x0804d681 in ?? ()