r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000340)='/proc/tty/ldiscs\x00', 0x0, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000000))
r1 = getpid()
r2 = pidfd_open(r1, 0x0)
pidfd_getfd(r2, r0, 0x0)