// the instrumentation is OS specific, but only amd64 and arm64 are
// supported in the runtime. See src/runtime/libfuzzer*.
//
// If you update this constraint, also update internal/platform.FuzzInstrumented.
//
//go:build !((darwin || linux || windows || freebsd) && (amd64 || arm64))

package fuzz

// TODO(#48504): re-enable on platforms where instrumentation works.

	switch goos {
	case "darwin", "freebsd", "linux", "windows":
		return true
	default:
		return false
	}
}

// FuzzInstrumented reports whether fuzzing on goos/goarch uses coverage
// instrumentation. (FuzzInstrumented implies FuzzSupported.)
func FuzzInstrumented(goos, goarch string) bool {
	switch goarch {
	case "amd64", "arm64":
		// TODO(#14565): support more architectures.
		return FuzzSupported(goos, goarch)

			if !strings.Contains(out, tc.expectedError) {
				t.Errorf("exited without expected error %q; got\n%s", tc.expectedError, out)
			}
		})
	}
}

// libFuzzerSupported is a copy of the function internal/platform.FuzzInstrumented,
// because the internal package can't be used here.
func libFuzzerSupported(goos, goarch string) bool {
	switch goarch {
	case "amd64", "arm64":
		// TODO(#14565): support more architectures.
		switch goos {

	add("fuzz", sysCondition("-fuzz", platform.FuzzSupported, false))
	add("fuzz-instrumented", sysCondition("-fuzz with instrumentation", platform.FuzzInstrumented, false))
	add("git", lazyBool("the 'git' executable exists and provides the standard CLI", hasWorkingGit))
	add("GODEBUG", script.PrefixCondition("GODEBUG contains <suffix>", hasGodebug))

// instrumentation is added. 'go test -fuzz' still works without coverage,
// but it generates random inputs without guidance, so it's much less effective.
func fuzzInstrumentFlags() []string {
	if !platform.FuzzInstrumented(cfg.Goos, cfg.Goarch) {
		return nil
	}
	return []string{"-d=libfuzzer"}
}

func instrumentInit() {
	if !cfg.BuildRace && !cfg.BuildMSan && !cfg.BuildASan {
		return
	}