.
Thread 3 (process 20853):
#0  0xb7f4a430 in __kernel_vsyscall ()
#1  0xb763a075 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb69ef0ef in ?? ()
#3  0xb6b0711d in ?? ()
#4  0xb69ef4ff in ?? ()
#5  0xb763650f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#6  0xb759e7ee in clone () from /lib/tls/i686/cmov/libc.so.6
.
Thread 2 (process 20854):
#0  0xb7f4a430 in __kernel_vsyscall ()
#1  0xb763a075 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb69ef0ef in ?? ()
#3  0xb6b0711d in ?? ()
#4  0xb69ef4ff in ?? ()
#5  0xb763650f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#6  0xb759e7ee in clone () from /lib/tls/i686/cmov/libc.so.6
.
Thread 1 (process 20847):
#0  0xb7179594 in ?? ()