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 * accompanied this code).

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package jdk.jfr.startupargs;

import jdk.jfr.Event;

import jdk.jfr.EventType;

import jdk.jfr.FlightRecorder;

import jdk.jfr.Name;

import jdk.jfr.Recording;

/**

 * @test

 * @summary Start a FlightRecording without any settings (not even default).

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

 * @run main/othervm jdk.jfr.startupargs.TestStartNoSettings

 *      -XX:StartFlightRecording=settings=none

 */

public class TestStartNoSettings {

    @Name("UserEvent")

    static class UserEvent extends Event {

    }

    public static void main(String[] a) throws Exception {

        boolean userEnabled = false;

        try (Recording r = new Recording()) {

            r.start();

            UserEvent e = new UserEvent();

            e.commit();

            for (EventType et : FlightRecorder.getFlightRecorder().getEventTypes()) {

                if (et.isEnabled()) {

                    if (!et.getName().equals("UserEvent")) {

                        throw new Exception("Only 'UserEvent' should be enabled");

                    }

                    userEnabled = true;

                }

            }

        }

        if (!userEnabled)  {

            throw new Exception("Expected 'UserEvent' to be enabled with -XX:StartFlightRecording=settings=none");

        }

    }

}