madvise(&(0x7f0000870000/0x4000)=nil, 0x4000, 0x17)
munmap(&(0x7f0000874000/0x1000)=nil, 0x1000)
mremap(&(0x7f0000871000/0x1000)=nil, 0x1000, 0x1000, 0x7, &(0x7f0000ffd000/0x1000)=nil)
mremap(&(0x7f0000ffd000/0x2000)=nil, 0x2000, 0x2000, 0x7, &(0x7f000086f000/0x2000)=nil)