mirror of
https://github.com/golang/sys.git
synced 2026-02-08 11:46:04 +03:00
3fead03e7d
Fixes golang/go#60409 Change-Id: I2d872a1a6fb63c27ab3753deff370e1c2f752bdd Reviewed-on: https://go-review.googlesource.com/c/sys/+/508397 Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> Reviewed-by: Benny Siegert <bsiegert@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
48 lines
1.2 KiB
Go
48 lines
1.2 KiB
Go
// Copyright 2023 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 linux || netbsd
|
|
// +build linux netbsd
|
|
|
|
package unix_test
|
|
|
|
import (
|
|
"testing"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
func TestMremap(t *testing.T) {
|
|
b, err := unix.Mmap(-1, 0, unix.Getpagesize(), unix.PROT_NONE, unix.MAP_ANON|unix.MAP_PRIVATE)
|
|
if err != nil {
|
|
t.Fatalf("Mmap: %v", err)
|
|
}
|
|
if err := unix.Mprotect(b, unix.PROT_READ|unix.PROT_WRITE); err != nil {
|
|
t.Fatalf("Mprotect: %v", err)
|
|
}
|
|
|
|
b[0] = 42
|
|
|
|
bNew, err := unix.Mremap(b, unix.Getpagesize()*2, unix.MremapMaymove)
|
|
if err != nil {
|
|
t.Fatalf("Mremap2: %v", err)
|
|
}
|
|
bNew[unix.Getpagesize()+1] = 84 // checks
|
|
|
|
if bNew[0] != 42 {
|
|
t.Fatal("first element value was changed")
|
|
}
|
|
if len(bNew) != unix.Getpagesize()*2 {
|
|
t.Fatal("new memory len not equal to specified len")
|
|
}
|
|
if cap(bNew) != unix.Getpagesize()*2 {
|
|
t.Fatal("new memory cap not equal to specified len")
|
|
}
|
|
|
|
_, err = unix.Mremap(b, unix.Getpagesize(), unix.MremapFixed)
|
|
if err != unix.EINVAL {
|
|
t.Fatalf("remapping to a fixed address; got %v, want %v", err, unix.EINVAL)
|
|
}
|
|
}
|