r0 = shmget$private(0x0, 0x4000, 0x5400185b, &(0x7f0000ffc000/0x4000)=nil)
shmat(r0, &(0x7f0000400000/0xc00000)=nil, 0x4000)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./file1\x00', 0x882c2, 0x0)
mmap(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x0, 0x1f012, r1, 0x0)