1 files changed, 81 insertions, 0 deletions
diff --git a/misc/cgo/testsanitizers/msan_test.go b/misc/cgo/testsanitizers/msan_test.go
new file mode 100644
index 0000000..96397e0
--- /dev/null
+++ b/misc/cgo/testsanitizers/msan_test.go
@@ -0,0 +1,81 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package sanitizers_test
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestMSAN(t *testing.T) {
+	goos, err := goEnv("GOOS")
+	if err != nil {
+		t.Fatal(err)
+	}
+	goarch, err := goEnv("GOARCH")
+	if err != nil {
+		t.Fatal(err)
+	}
+	// The msan tests require support for the -msan option.
+	if !mSanSupported(goos, goarch) {
+		t.Skipf("skipping on %s/%s; -msan option is not supported.", goos, goarch)
+	}
+
+	t.Parallel()
+	// Overcommit is enabled by default on FreeBSD (vm.overcommit=0, see tuning(7)).
+	// Do not skip tests with stricter overcommit settings unless testing shows that FreeBSD has similar issues.
+	if goos == "linux" {
+		requireOvercommit(t)
+	}
+	config := configure("memory")
+	config.skipIfCSanitizerBroken(t)
+
+	mustRun(t, config.goCmd("build", "std"))
+
+	cases := []struct {
+		src         string
+		wantErr     bool
+		experiments []string
+	}{
+		{src: "msan.go"},
+		{src: "msan2.go"},
+		{src: "msan2_cmsan.go"},
+		{src: "msan3.go"},
+		{src: "msan4.go"},
+		{src: "msan5.go"},
+		{src: "msan6.go"},
+		{src: "msan7.go"},
+		{src: "msan8.go"},
+		{src: "msan_fail.go", wantErr: true},
+		// This may not always fail specifically due to MSAN. It may sometimes
+		// fail because of a fault. However, we don't care what kind of error we
+		// get here, just that we get an error. This is an MSAN test because without
+		// MSAN it would not fail deterministically.
+		{src: "arena_fail.go", wantErr: true, experiments: []string{"arenas"}},
+	}
+	for _, tc := range cases {
+		tc := tc
+		name := strings.TrimSuffix(tc.src, ".go")
+		t.Run(name, func(t *testing.T) {
+			t.Parallel()
+
+			dir := newTempDir(t)
+			defer dir.RemoveAll(t)
+
+			outPath := dir.Join(name)
+			mustRun(t, config.goCmdWithExperiments("build", []string{"-o", outPath, srcPath(tc.src)}, tc.experiments))
+
+			cmd := hangProneCmd(outPath)
+			if tc.wantErr {
+				out, err := cmd.CombinedOutput()
+				if err != nil {
+					return
+				}
+				t.Fatalf("%#q exited without error; want MSAN failure\n%s", strings.Join(cmd.Args, " "), out)
+			}
+			mustRun(t, cmd)
+		})
+	}
+}