a, err := doDemangle(name[2:], options...)
		return a, adjustErr(err, 2)
	}

	if strings.HasPrefix(name, "___Z") {
		// clang extensions
		block := strings.LastIndex(name, "_block_invoke")
		if block == -1 {
			return nil, ErrNotMangledName
		}
		a, err := doDemangle(name[4:block], options...)
		if err != nil {
			return a, adjustErr(err, 4)
		}
		name = strings.TrimPrefix(name[block:], "_block_invoke")

	return fmt.Errorf("server response: %s", resp.Status)
}

// cpuProfileHandler is the Go pprof CPU profile handler URL.
const cpuProfileHandler = "/debug/pprof/profile"

// adjustURL applies the duration/timeout values and Go specific defaults.
func adjustURL(source string, duration, timeout time.Duration) (string, time.Duration) {
	u, err := url.Parse(source)
	if err != nil || (u.Host == "" && u.Scheme != "" && u.Scheme != "file") {

	}
	return profile, nil
}

// adjustURL validates if a profile source is a URL and returns an
// cleaned up URL and the timeout to use for retrieval over HTTP.
// If the source cannot be recognized as a URL it returns an empty string.
func adjustURL(source string, duration, timeout time.Duration) (string, time.Duration) {
	u, err := url.Parse(source)