1 /*
   2  * Copyright (c) 2014, 2019, 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 package gc;
  25 
  26 import jdk.test.lib.process.ProcessTools;
  27 import jdk.test.lib.process.OutputAnalyzer;
  28 import jdk.test.lib.Platform;
  29 
  30 /*
  31  * @test TestCardTablePageCommits
  32  * @key gc
  33  * @bug 8059066
  34  * @summary Tests that the card table does not commit the same page twice
  35  * @requires vm.gc.Parallel
  36  * @library /test/lib
  37  * @modules java.base/jdk.internal.misc
  38  * @run driver gc.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         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  48             Xmx,
  49             "-XX:NativeMemoryTracking=detail",
  50             "-XX:+UseParallelGC",
  51             "-version");
  52         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  53         output.shouldHaveExitValue(0);
  54     }
  55 }