test/jdk/jdk/jfr/startupargs/TestRetransform.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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package jdk.jfr.startupargs;

import jdk.jfr.Event;
import jdk.jfr.EventType;
import jdk.jfr.Recording;
import jdk.test.lib.Asserts;
import jdk.test.lib.jfr.Events;
import jdk.test.lib.jfr.SimpleEvent;

/*
 * @test
 * @key jfr
 * @library /test/lib
 * @run main/othervm -XX:FlightRecorderOptions=retransform=false jdk.jfr.startupargs.TestRetransform
 * @run main/othervm -XX:FlightRecorderOptions=retransform=true jdk.jfr.startupargs.TestRetransform
 */
public class TestRetransform {
    private static class TestEvent extends Event {
    }
    public static void main(String[] args) throws Exception {
        EventType type = EventType.getEventType(TestEvent.class);
        if (type.isEnabled()) {
            Asserts.fail("Expected event to be disabled before recording start");
        }
        Recording r = new Recording();
        r.start();
        if (!type.isEnabled()) {
            Asserts.fail("Expected event to be enabled during recording");
        }
        TestEvent testEvent = new TestEvent();
        testEvent.commit();
        loadEventClassDuringRecording();
        r.stop();
        if (type.isEnabled()) {
            Asserts.fail("Expected event to be disabled after recording stopped");
        }
        Events.hasEvent(r, SimpleEvent.class.getName());
        Events.hasEvent(r, TestEvent.class.getName());
    }

    // Classes that are loaded during a recording
    // should get instrumentation on class load
    private static void loadEventClassDuringRecording() {
        SimpleEvent event = new SimpleEvent();
        event.commit();
    }

}