github.com/HACKERALERT/Picocrypt/src/external/sys@v0.0.0-20210609020157-e519952f829f/unix/mmap_unix_test.go (about)

     1  // Copyright 2014 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
     6  // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
     7  
     8  package unix_test
     9  
    10  import (
    11  	"runtime"
    12  	"testing"
    13  
    14  	"golang.org/x/sys/unix"
    15  )
    16  
    17  func TestMmap(t *testing.T) {
    18  	b, err := unix.Mmap(-1, 0, unix.Getpagesize(), unix.PROT_NONE, unix.MAP_ANON|unix.MAP_PRIVATE)
    19  	if err != nil {
    20  		t.Fatalf("Mmap: %v", err)
    21  	}
    22  	if err := unix.Mprotect(b, unix.PROT_READ|unix.PROT_WRITE); err != nil {
    23  		t.Fatalf("Mprotect: %v", err)
    24  	}
    25  
    26  	b[0] = 42
    27  
    28  	if runtime.GOOS == "aix" {
    29  		t.Skip("msync returns invalid argument for AIX, skipping msync test")
    30  	} else {
    31  		if err := unix.Msync(b, unix.MS_SYNC); err != nil {
    32  			t.Fatalf("Msync: %v", err)
    33  		}
    34  	}
    35  
    36  	if err := unix.Madvise(b, unix.MADV_DONTNEED); err != nil {
    37  		t.Fatalf("Madvise: %v", err)
    38  	}
    39  	if err := unix.Munmap(b); err != nil {
    40  		t.Fatalf("Munmap: %v", err)
    41  	}
    42  }