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.
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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
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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  * @run driver TestCardTablePageCommits
38  */
39 public class TestCardTablePageCommits {
main(String args[])40     public static void main(String args[]) throws Exception {
41         // The test is run with a small heap to make sure all pages in the card
42         // table gets committed. Need 8 MB heap to trigger the bug on SPARC
43         // because of 8kB pages, assume 4 KB pages for all other CPUs.
44         String Xmx = Platform.isSparc() ? "-Xmx8m" : "-Xmx4m";
45 
46         String[] opts = {Xmx, "-XX:NativeMemoryTracking=detail", "-XX:+UseParallelGC", "-version"};
47         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(opts);
48         OutputAnalyzer output = new OutputAnalyzer(pb.start());
49         output.shouldHaveExitValue(0);
50     }
51 }
52