mlock(&(0x7f0000872000/0x2000)=nil, 0x2000)
munmap(&(0x7f0000875000/0x4000)=nil, 0x4000)
mbind(&(0x7f0000873000/0x3000)=nil, 0x3000, 0x1, 0x0, 0x0, 0x2)