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1// Copyright 2017 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 linux || (freebsd && amd64)
6
7package sanitizers_test
8
9import (
10	"internal/platform"
11	"internal/testenv"
12	"strings"
13	"testing"
14)
15
16func TestMSAN(t *testing.T) {
17	testenv.MustHaveGoBuild(t)
18	testenv.MustHaveCGO(t)
19	goos, err := goEnv("GOOS")
20	if err != nil {
21		t.Fatal(err)
22	}
23	goarch, err := goEnv("GOARCH")
24	if err != nil {
25		t.Fatal(err)
26	}
27	// The msan tests require support for the -msan option.
28	if !platform.MSanSupported(goos, goarch) {
29		t.Skipf("skipping on %s/%s; -msan option is not supported.", goos, goarch)
30	}
31
32	t.Parallel()
33	// Overcommit is enabled by default on FreeBSD (vm.overcommit=0, see tuning(7)).
34	// Do not skip tests with stricter overcommit settings unless testing shows that FreeBSD has similar issues.
35	if goos == "linux" {
36		requireOvercommit(t)
37	}
38	config := configure("memory")
39	config.skipIfCSanitizerBroken(t)
40
41	mustRun(t, config.goCmd("build", "std"))
42
43	cases := []struct {
44		src         string
45		wantErr     bool
46		experiments []string
47	}{
48		{src: "msan.go"},
49		{src: "msan2.go"},
50		{src: "msan2_cmsan.go"},
51		{src: "msan3.go"},
52		{src: "msan4.go"},
53		{src: "msan5.go"},
54		{src: "msan6.go"},
55		{src: "msan7.go"},
56		{src: "msan8.go"},
57		{src: "msan_fail.go", wantErr: true},
58		// This may not always fail specifically due to MSAN. It may sometimes
59		// fail because of a fault. However, we don't care what kind of error we
60		// get here, just that we get an error. This is an MSAN test because without
61		// MSAN it would not fail deterministically.
62		{src: "arena_fail.go", wantErr: true, experiments: []string{"arenas"}},
63	}
64	for _, tc := range cases {
65		tc := tc
66		name := strings.TrimSuffix(tc.src, ".go")
67		t.Run(name, func(t *testing.T) {
68			t.Parallel()
69
70			dir := newTempDir(t)
71			defer dir.RemoveAll(t)
72
73			outPath := dir.Join(name)
74			mustRun(t, config.goCmdWithExperiments("build", []string{"-o", outPath, srcPath(tc.src)}, tc.experiments))
75
76			cmd := hangProneCmd(outPath)
77			if tc.wantErr {
78				out, err := cmd.CombinedOutput()
79				if err != nil {
80					return
81				}
82				t.Fatalf("%#q exited without error; want MSAN failure\n%s", strings.Join(cmd.Args, " "), out)
83			}
84			mustRun(t, cmd)
85		})
86	}
87}
88