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  * @library /testlibrary /../../test/lib
  30  * @build Basic
  31  * @run main/othervm -Xint Basic
  32  * @run main/othervm -Xint -XX:+UseCondCardMark Basic
  33  * @run main/othervm -XX:TieredStopAtLevel=1 Basic
  34  * @run main/othervm -XX:TieredStopAtLevel=1 -XX:+UseCondCardMark Basic
  35  * @run main/othervm -XX:TieredStopAtLevel=4 Basic
  36  * @run main/othervm -XX:TieredStopAtLevel=4 -XX:+UseCondCardMark Basic
  37  * @run main/othervm -XX:-TieredCompilation Basic
  38  * @run main/othervm -XX:-TieredCompilation -XX:+UseCondCardMark Basic
  39 */
  40 public class Basic {
  41 
  42     static volatile MyObject sink;
  43 
  44     public static void main(String args[]) {
  45         final int COUNT = 10000000;
  46         for (int c = 0; c < COUNT; c++) {
  47              MyObject o = new MyObject();
  48              o.x = c;
  49              doStore(o);
  50         }
  51 
  52         if (sink.x != COUNT-1) {
  53              throw new IllegalStateException("Failed");
  54         }
  55     }
  56 
  57     public static void doStore(MyObject o) {
  58         sink = o;
  59     }
  60 
  61     static class MyObject {
  62         int x;
  63     }
  64 
  65 }