test/hotspot/jtreg/vmTestbase/nsk/jvmti/AttachOnDemand/attach021/attach021Target.java

/*
 * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package nsk.jvmti.AttachOnDemand.attach021;

import nsk.share.ClassUnloader;
import nsk.share.aod.TargetApplicationWaitingAgents;

public class attach021Target extends TargetApplicationWaitingAgents {

    /*
     * native methods should be registered by the test agent
     */
    private static native boolean setTagFor(Object obj);

    private static native void shutdownAgent();

    private boolean createTaggedObject() {
        Object object = new Object();

        log.display("Setting tag for " + object);

        if (!setTagFor(object)) {
            setStatusFailed("Error during object tagging");
            return false;
        }

        return true;
    }

    protected void targetApplicationActions() throws Throwable {
        try {
            if (createTaggedObject()) {
                log.display("Provoking GC");
                ClassUnloader.eatMemory();
            }
        } finally {
            shutdownAgent();
        }
    }

    public static void main(final String[] args) {
        new attach021Target().runTargetApplication(args);
    }
}