mirror of
https://github.com/rwinkhart/sys.git
synced 2026-08-29 13:26:45 -04:00
Anton Kuklin
e0c3b6e6ae
For golang/go#60409 Change-Id: I75a9732ee996f0aeb91599d80803f96ada468c27 GitHub-Last-Rev: c348b6194d9fbe92f4f912c66709b0af75810e99 GitHub-Pull-Request: golang/sys#164 Reviewed-on: https://go-review.googlesource.com/c/sys/+/502715 Auto-Submit: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Run-TryBot: Ian Lance Taylor <iant@google.com>
48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
// Copyright 2023 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build linux
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// +build linux
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package unix_test
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import (
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"testing"
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"golang.org/x/sys/unix"
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)
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func TestMremap(t *testing.T) {
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b, err := unix.Mmap(-1, 0, unix.Getpagesize(), unix.PROT_NONE, unix.MAP_ANON|unix.MAP_PRIVATE)
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if err != nil {
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t.Fatalf("Mmap: %v", err)
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}
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if err := unix.Mprotect(b, unix.PROT_READ|unix.PROT_WRITE); err != nil {
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t.Fatalf("Mprotect: %v", err)
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}
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b[0] = 42
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bNew, err := unix.Mremap(b, unix.Getpagesize()*2, unix.MREMAP_MAYMOVE)
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if err != nil {
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t.Fatalf("Mremap2: %v", err)
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}
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bNew[unix.Getpagesize()+1] = 84 // checks
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if bNew[0] != 42 {
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t.Fatal("first element value was changed")
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}
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if len(bNew) != unix.Getpagesize()*2 {
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t.Fatal("new memory len not equal to specified len")
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}
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if cap(bNew) != unix.Getpagesize()*2 {
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t.Fatal("new memory cap not equal to specified len")
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}
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_, err = unix.Mremap(b, unix.Getpagesize(), unix.MREMAP_FIXED)
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if err != unix.EINVAL {
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t.Fatalf("unix.MREMAP_FIXED should be forbidden")
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}
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}
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