Corpus for waitid$P_PIDFD:

Coverage	Program
567	waitid$P_PIDFD
556	getpid-pidfd_open-waitid$P_PIDFD
476	waitid$P_PIDFD
63	getpid-pidfd_open-waitid$P_PIDFD
26	getrusage-waitid$P_PIDFD
24	syz_open_dev$vcsn-waitid$P_PIDFD
24	waitid$P_PIDFD-waitid$P_PIDFD