r0 = getpid()
r1 = fork()
ptrace(0x10, r1)
ptrace(0x420f, r1)
getpgid(r0)
r2 = fork()
ptrace(0x4208, r2)
r3 = gettid()
wait4(r3, &(0x7f0000000000), 0x1, &(0x7f0000000040))
ptrace(0x4207, r1)