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c892bb7ec2
OpenBSD apparently doesn't allow unmapping address space if part of the region is already unmapped.
This tweaks the test so that munmapping twice no longer happens.
Fixes golang/go#68181
Change-Id: I588255f5e10ec015dbb7188eac79cee6be570680
GitHub-Last-Rev: 2535abd892
GitHub-Pull-Request: golang/sys#199
Cq-Include-Trybots: luci.golang.try:go1.22-openbsd-amd64
Reviewed-on: https://go-review.googlesource.com/c/sys/+/595095
TryBot-Bypass: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
71 lines
1.9 KiB
Go
71 lines
1.9 KiB
Go
// Copyright 2014 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 aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
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package unix_test
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import (
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"runtime"
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"testing"
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"golang.org/x/sys/unix"
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)
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func TestMmap(t *testing.T) {
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mmapProt := unix.PROT_NONE
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mprotectProt := unix.PROT_READ | unix.PROT_WRITE
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// On NetBSD PAX mprotect prohibits setting protection bits
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// missing from the original mmap call unless explicitly
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// requested with PROT_MPROTECT.
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if runtime.GOOS == "netbsd" {
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// PROT_MPROTECT(x) is defined as ((x) << 3):
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// https://github.com/NetBSD/src/blob/aba449a55bf91b44bc68f542edd9afa341962b89/sys/sys/mman.h#L73
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mmapProt = mprotectProt << 3
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}
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b, err := unix.Mmap(-1, 0, unix.Getpagesize(), mmapProt, 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, mprotectProt); 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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if runtime.GOOS == "aix" {
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t.Skip("msync returns invalid argument for AIX, skipping msync test")
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} else {
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if err := unix.Msync(b, unix.MS_SYNC); err != nil {
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t.Fatalf("Msync: %v", err)
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}
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}
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if err := unix.Madvise(b, unix.MADV_DONTNEED); err != nil {
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t.Fatalf("Madvise: %v", err)
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}
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if err := unix.Munmap(b); err != nil {
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t.Fatalf("Munmap: %v", err)
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}
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}
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func TestMmapPtr(t *testing.T) {
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p, err := unix.MmapPtr(-1, 0, nil, uintptr(2*unix.Getpagesize()),
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unix.PROT_NONE, unix.MAP_ANON|unix.MAP_PRIVATE)
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if err != nil {
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t.Fatalf("MmapPtr: %v", err)
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}
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if _, err := unix.MmapPtr(-1, 0, p, uintptr(unix.Getpagesize()),
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unix.PROT_READ|unix.PROT_WRITE, unix.MAP_ANON|unix.MAP_PRIVATE|unix.MAP_FIXED); err != nil {
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t.Fatalf("MmapPtr: %v", err)
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}
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*(*byte)(p) = 42
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if err := unix.MunmapPtr(p, uintptr(2*unix.Getpagesize())); err != nil {
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t.Fatalf("MunmapPtr: %v", err)
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}
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}
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