framepop002.java

/*
 * Copyright (c) 2003, 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.FramePop;

import java.io.PrintStream;

public class framepop002 {

    final static int JCK_STATUS_BASE = 95;
    final static int THREADS_LIMIT = 20;
    final static int NESTING_DEPTH = 100;
    final static String TEST_THREAD_NAME_BASE = "Test Thread #";

    static {
        try {
            System.loadLibrary("framepop002");
        } catch (UnsatisfiedLinkError ule) {
            System.err.println("Could not load framepop002 library");
            System.err.println("java.library.path:"
                + System.getProperty("java.library.path"));
            throw ule;
        }
    }

    native static void getReady();
    native static int check();

    public static void main(String args[]) {
        args = nsk.share.jvmti.JVMTITest.commonInit(args);

        // produce JCK-like exit status.
        System.exit(run(args, System.out) + JCK_STATUS_BASE);
    }

    public static int run(String args[], PrintStream out) {
        TestThread[] t = new TestThread[THREADS_LIMIT];
        getReady();
        for (int i = 0; i < THREADS_LIMIT; i++) {
            t[i] = new TestThread(TEST_THREAD_NAME_BASE + i);
            t[i].start();
        }
        for (int i = 0; i < THREADS_LIMIT; i++) {
            try {
                t[i].join();
            } catch (InterruptedException e) {
                throw new Error("Unexpected: " + e);
            }
        }
        return check();
    }

    static class TestThread extends Thread {
        int nestingCount = 0;

        // Constructor
        TestThread(String name) {
            super(name);
        }

        public void run() {
            if (nestingCount < NESTING_DEPTH) {
                nestingCount++;
                run();
            }
        }
    }
}