.
Thread 4 (process 8451):
#0  0xffffe405 in __kernel_vsyscall ()
#1  0xf797ff15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib32/libpthread.so.0
#2  0xf6ca8728 in ?? ()
#3  0xf5b8403c in ?? ()
#4  0xf5b8406c in ?? ()
#5  0xf59e22f8 in ?? ()
#6  0xf6ca85ff in ?? ()
#7  0xf5b840d4 in ?? ()
#8  0x00000004 in ?? ()
#9  0x00000008 in ?? ()
#10 0xf72f5e20 in ?? ()
#11 0xf5b8302c in ?? ()
#12 0xf5b83020 in ?? ()
#13 0xf59e2338 in ?? ()
#14 0xf6da1dd8 in ?? ()
#15 0xf5b84020 in ?? ()
#16 0xffffffff in ?? ()
#17 0x00000000 in ?? ()
.
Thread 3 (process 8452):
#0  0xffffe405 in __kernel_vsyscall ()
#1  0xf797ff15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib32/libpthread.so.0
#2  0xf6ca8728 in ?? ()
#3  0xf5b8410c in ?? ()
#4  0xf5b8413c in ?? ()
#5  0x00000000 in ?? ()
.
Thread 2 (process 8453):
#0  0xffffe405 in __kernel_vsyscall ()
#1  0xf7982175 in sem_wait@@GLIBC_2.1 () from /lib32/libpthread.so.0
#2  0xf6cb28d8 in ?? ()
#3  0xf5b86d70 in ?? ()
#4  0x00000000 in ?? ()
.
Thread 1 (process 8438):
#0  0xf7bac782 in ?? ()
#1  0x00000064 in ?? ()
#2  0x00000000 in ?? ()