1 /*
   2 * Copyright (c) 2014, 2016, 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 import jdk.test.lib.JDKToolFinder;
  25 import jdk.test.lib.process.ProcessTools;
  26 import jdk.test.lib.process.OutputAnalyzer;
  27 import jdk.test.lib.Platform;
  28 
  29 /*
  30  * @test TestCardTablePageCommits
  31  * @key gc
  32  * @bug 8059066
  33  * @summary Tests that the card table does not commit the same page twice
  34  * @requires vm.gc.Parallel
  35  * @library /test/lib
  36  * @modules java.base/jdk.internal.misc
  37  *          java.management
  38  * @run driver TestCardTablePageCommits
  39  */
  40 public class TestCardTablePageCommits {
  41     public static void main(String args[]) throws Exception {
  42         // The test is run with a small heap to make sure all pages in the card
  43         // table gets committed. Need 8 MB heap to trigger the bug on SPARC
  44         // because of 8kB pages, assume 4 KB pages for all other CPUs.
  45         String Xmx = Platform.isSparc() ? "-Xmx8m" : "-Xmx4m";
  46 
  47         String[] opts = {Xmx, "-XX:NativeMemoryTracking=detail", "-XX:+UseParallelGC", "-version"};
  48         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(opts);
  49         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  50         output.shouldHaveExitValue(0);
  51     }
  52 }