jdk/test/demo/jvmti/hprof/MonitorTest.java

/*
 * Copyright (c) 2004, 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.
 *
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/* @test
 * @bug 5012882
 * @summary Test jvmti hprof
 *
 * @compile -g ../Context.java ../DemoRun.java
 * @build MonitorTest
 * @run main MonitorTest Context 25 200 1000
 */

/* To create monitor contention, increase the default configuration.
 *   Hprof seems to have historically not output anything unless certain
 *   limits have been reached on the total contention time.
 */

public class MonitorTest {

    public static void main(String args[]) throws Exception {
        DemoRun hprof;

        /* Run JVMTI hprof agent with monitor=y */
        hprof = new DemoRun("hprof", "monitor=y");
        hprof.runit(args[0]);

        /* Make sure patterns in output look ok */
        if (hprof.output_contains("ERROR")) {
            throw new RuntimeException("Test failed - ERROR seen in output");
        }

        /* Must be a pass. */
        System.out.println("Test passed - cleanly terminated");
    }
}