1 /*
   2  * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @bug 8076987
  27  * @bug 8078438
  28  * @summary Verify UseCondCardMark works
  29  * @modules java.base/jdk.internal.misc
  30  * @run main/othervm -Xint Basic
  31  * @run main/othervm -Xint -XX:+UseCondCardMark Basic
  32  * @run main/othervm -XX:TieredStopAtLevel=1 Basic
  33  * @run main/othervm -XX:TieredStopAtLevel=1 -XX:+UseCondCardMark Basic
  34  * @run main/othervm -XX:TieredStopAtLevel=4 Basic
  35  * @run main/othervm -XX:TieredStopAtLevel=4 -XX:+UseCondCardMark Basic
  36  * @run main/othervm -XX:-TieredCompilation Basic
  37  * @run main/othervm -XX:-TieredCompilation -XX:+UseCondCardMark Basic
  38 */
  39 public class Basic {
  40 
  41     static volatile MyObject sink;
  42 
  43     public static void main(String args[]) {
  44         final int COUNT = 10000000;
  45         for (int c = 0; c < COUNT; c++) {
  46              MyObject o = new MyObject();
  47              o.x = c;
  48              doStore(o);
  49         }
  50 
  51         if (sink.x != COUNT-1) {
  52              throw new IllegalStateException("Failed");
  53         }
  54     }
  55 
  56     public static void doStore(MyObject o) {
  57         sink = o;
  58     }
  59 
  60     static class MyObject {
  61         int x;
  62     }
  63 
  64 }