1 #00 pc 0000000000000550 waiter64 2 #01 pc 0000000000000568 waiter64 3 #02 pc 000000000000057c waiter64 4 #03 pc 0000000000000590 waiter64 5 #04 pc 00000000000a8e98 libc.so (__libc_init+88) 6