| // Copyright 2014 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris |
| // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris |
| |
| package unix_test |
| |
| import ( |
| "runtime" |
| "testing" |
| |
| "golang.org/x/sys/unix" |
| ) |
| |
| func TestMmap(t *testing.T) { |
| mmapProt := unix.PROT_NONE |
| mprotectProt := unix.PROT_READ | unix.PROT_WRITE |
| // On NetBSD PAX mprotect prohibits setting protection bits |
| // missing from the original mmap call unless explicitly |
| // requested with PROT_MPROTECT. |
| if runtime.GOOS == "netbsd" { |
| // PROT_MPROTECT(x) is defined as ((x) << 3): |
| // https://github.com/NetBSD/src/blob/aba449a55bf91b44bc68f542edd9afa341962b89/sys/sys/mman.h#L73 |
| mmapProt = mprotectProt << 3 |
| } |
| b, err := unix.Mmap(-1, 0, unix.Getpagesize(), mmapProt, unix.MAP_ANON|unix.MAP_PRIVATE) |
| if err != nil { |
| t.Fatalf("Mmap: %v", err) |
| } |
| if err := unix.Mprotect(b, mprotectProt); err != nil { |
| t.Fatalf("Mprotect: %v", err) |
| } |
| |
| b[0] = 42 |
| |
| if runtime.GOOS == "aix" { |
| t.Skip("msync returns invalid argument for AIX, skipping msync test") |
| } else { |
| if err := unix.Msync(b, unix.MS_SYNC); err != nil { |
| t.Fatalf("Msync: %v", err) |
| } |
| } |
| |
| if err := unix.Madvise(b, unix.MADV_DONTNEED); err != nil { |
| t.Fatalf("Madvise: %v", err) |
| } |
| if err := unix.Munmap(b); err != nil { |
| t.Fatalf("Munmap: %v", err) |
| } |
| } |