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