perf_event_open(0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0)
r0 = openat$snapshot(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./file1\x00', 0x882c2, 0x0)
mmap(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x0, 0x1f012, r1, 0x0)
ioctl$SNAPSHOT_AVAIL_SWAP_SIZE(r0, 0x80083313, 0x0)