123 lines
4.0 KiB
Java
123 lines
4.0 KiB
Java
/*
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* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package nsk.jvmti.GetObjectMonitorUsage;
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import java.io.PrintStream;
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public class objmonusage003 {
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final static int JCK_STATUS_BASE = 95;
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final static int NUMBER_OF_THREADS = 16;
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final static int WAIT_TIME = 100;
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volatile static boolean waiterInLockCheck = false;
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static {
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try {
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System.loadLibrary("objmonusage003");
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} catch (UnsatisfiedLinkError ule) {
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System.err.println("Could not load objmonusage003 library");
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System.err.println("java.library.path:"
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+ System.getProperty("java.library.path"));
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throw ule;
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}
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}
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static Object lockStart = new Object();
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static Object lockCheck = new Object();
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native static int getRes();
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native static void check(Object obj, Thread owner,
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int entryCount, int waiterCount);
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public static void main(String args[]) {
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args = nsk.share.jvmti.JVMTITest.commonInit(args);
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// produce JCK-like exit status.
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System.exit(run(args, System.out) + JCK_STATUS_BASE);
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}
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public static int run(String args[], PrintStream out) {
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check(lockCheck, null, 0, 0);
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synchronized (lockCheck) {
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check(lockCheck, Thread.currentThread(), 1, 0);
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}
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WaiterThread thr[] = new WaiterThread[NUMBER_OF_THREADS];
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for (int i = 0; i < NUMBER_OF_THREADS; i++) {
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thr[i] = new WaiterThread();
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synchronized (lockStart) {
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thr[i].start();
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try {
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lockStart.wait();
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} catch (InterruptedException e) {
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throw new Error("Unexpected " + e);
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}
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}
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synchronized (lockCheck) {
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while (!waiterInLockCheck) {
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try {
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lockCheck.wait(WAIT_TIME);
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} catch (InterruptedException e) {
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throw new Error("Unexpected " + e);
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}
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}
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waiterInLockCheck = false;
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}
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check(lockCheck, null, 0, i + 1);
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}
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synchronized (lockCheck) {
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lockCheck.notifyAll();
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}
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for (int i = 0; i < NUMBER_OF_THREADS; i++) {
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try {
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thr[i].join();
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} catch (InterruptedException e) {
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throw new Error("Unexpected " + e);
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}
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}
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check(lockCheck, null, 0, 0);
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return getRes();
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}
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static class WaiterThread extends Thread {
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public synchronized void run() {
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synchronized (lockStart) {
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lockStart.notify();
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}
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synchronized (lockCheck) {
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try {
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waiterInLockCheck = true;
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lockCheck.wait();
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} catch (InterruptedException e) {
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throw new Error("Unexpected " + e);
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}
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}
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}
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}
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}
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