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9123221ccf
The libFuzzer generated binary by default writes failure input into the current directory. Set cmd.Dir to the temporary directory so it won't write to GOROOT when running the test. Change-Id: I3e4ce7e3f845be5c9f09511c36e7a9a396eafad2 Reviewed-on: https://go-review.googlesource.com/c/go/+/459556 Reviewed-by: Than McIntosh <thanm@google.com> Run-TryBot: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
// Copyright 2022 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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package sanitizers_test
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import (
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"strings"
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"testing"
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)
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func TestLibFuzzer(t *testing.T) {
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goos, err := goEnv("GOOS")
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if err != nil {
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t.Fatal(err)
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}
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goarch, err := goEnv("GOARCH")
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if err != nil {
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t.Fatal(err)
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}
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if !libFuzzerSupported(goos, goarch) {
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t.Skipf("skipping on %s/%s; libfuzzer option is not supported.", goos, goarch)
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}
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config := configure("fuzzer")
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config.skipIfCSanitizerBroken(t)
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cases := []struct {
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goSrc string
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cSrc string
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expectedError string
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}{
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{goSrc: "libfuzzer1.go", expectedError: "panic: found it"},
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{goSrc: "libfuzzer2.go", cSrc: "libfuzzer2.c", expectedError: "panic: found it"},
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}
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for _, tc := range cases {
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tc := tc
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name := strings.TrimSuffix(tc.goSrc, ".go")
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t.Run(name, func(t *testing.T) {
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t.Parallel()
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dir := newTempDir(t)
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defer dir.RemoveAll(t)
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// build Go code in libfuzzer mode to a c-archive
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outPath := dir.Join(name)
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archivePath := dir.Join(name + ".a")
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mustRun(t, config.goCmd("build", "-buildmode=c-archive", "-o", archivePath, srcPath(tc.goSrc)))
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// build C code (if any) and link with Go code
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cmd, err := cc(config.cFlags...)
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if err != nil {
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t.Fatalf("error running cc: %v", err)
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}
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cmd.Args = append(cmd.Args, config.ldFlags...)
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cmd.Args = append(cmd.Args, "-o", outPath, "-I", dir.Base())
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if tc.cSrc != "" {
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cmd.Args = append(cmd.Args, srcPath(tc.cSrc))
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}
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cmd.Args = append(cmd.Args, archivePath)
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mustRun(t, cmd)
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cmd = hangProneCmd(outPath)
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cmd.Dir = dir.Base()
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outb, err := cmd.CombinedOutput()
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out := string(outb)
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if err == nil {
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t.Fatalf("fuzzing succeeded unexpectedly; output:\n%s", out)
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}
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if !strings.Contains(out, tc.expectedError) {
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t.Errorf("exited without expected error %q; got\n%s", tc.expectedError, out)
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}
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})
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}
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}
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// libFuzzerSupported is a copy of the function internal/platform.FuzzInstrumented,
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// because the internal package can't be used here.
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func libFuzzerSupported(goos, goarch string) bool {
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switch goarch {
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case "amd64", "arm64":
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// TODO(#14565): support more architectures.
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switch goos {
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case "darwin", "freebsd", "linux", "windows":
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return true
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default:
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return false
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}
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default:
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return false
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}
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}
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