| /* |
| * Copyright (c) 2013, 2016, 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 jdk.internal.vm.annotation.Contended; |
| |
| /* |
| * @test |
| * @bug 8015272 |
| * @summary \@Contended within the same group to use the same oop map |
| * |
| * @modules java.base/jdk.internal.vm.annotation |
| * @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; |
| } |
| |
| } |
| |