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2320a9c158
When adding Mprotect to TestMmap in CL 56172, PROT_WRITE was implicitly assumed to also include PROT_READ. This is not necessarily true on all OSes and makes TestMmap crash on openbsd/386. As suggested my Mikio Hara fix it by also setting PROT_READ on the memory mapping. Fixes golang/go#21962 Change-Id: Ia789ab8b31f8dec0c3db23cc950ccdd4aab3db05 Reviewed-on: https://go-review.googlesource.com/65230 TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
36 lines
844 B
Go
36 lines
844 B
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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// +build darwin dragonfly freebsd linux netbsd openbsd solaris
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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 TestMmap(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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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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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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