/*

 * Copyright (c) 2013, 2015, 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.

 */

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.lang.Class;

import java.lang.String;

import java.lang.System;

import java.lang.management.ManagementFactory;

import java.lang.management.RuntimeMXBean;

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.CyclicBarrier;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import java.lang.reflect.Field;

import java.lang.reflect.Modifier;

import sun.misc.Unsafe;

import sun.misc.Contended;

/*

 * @test

 * @bug     8015272

 * @summary \@Contended within the same group to use the same oop map

 *

 * @modules java.base/sun.misc

 * @run main/othervm -XX:-RestrictContended -XX:ContendedPaddingWidth=128 -Xmx128m OopMapsSameGroup

 */

public class OopMapsSameGroup {

    public static final int COUNT = 10000;

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

        Object o01 = new Object();

        Object o02 = new Object();

        Object o03 = new Object();

        Object o04 = new Object();

        R[] rs = new R[COUNT];

        for (int i = 0; i < COUNT; i++) {

           R r = new R();

           r.o01 = o01;

           r.o02 = o02;

           r.o03 = o03;

           r.o04 = o04;

           rs[i] = r;

        }

        System.gc();

        for (int i = 0; i < COUNT; i++) {

           R r = rs[i];

           if (r.o01 != o01) throw new Error("Test Error: o01");

           if (r.o02 != o02) throw new Error("Test Error: o02");

           if (r.o03 != o03) throw new Error("Test Error: o03");

           if (r.o04 != o04) throw new Error("Test Error: o04");

        }

    }

    public static class R {

        @Contended("group1")

        Object o01;

        @Contended("group1")

        Object o02;

        @Contended("group2")

        Object o03;

        @Contended("group2")

        Object o04;

    }

}