prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000000))
r0 = getpgrp(0x0)
r1 = getpid()
rt_tgsigqueueinfo(r0, r1, 0x0, &(0x7f0000000180)={0x0, 0x0, 0xf9ffffff})