1 /*
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   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.
  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
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  23 
  24 /*
  25  * @test CompressedClassSpaceSizeInJmapHeap
  26  * @bug 8004924
  27  * @summary Checks that jmap -heap contains the flag CompressedClassSpaceSize
  28  * @library /testlibrary
  29  * @modules java.base/sun.misc
  30  *          java.management
  31  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:CompressedClassSpaceSize=50m CompressedClassSpaceSizeInJmapHeap
  32  */
  33 
  34 import jdk.test.lib.*;
  35 import java.nio.file.*;
  36 import java.io.File;
  37 import java.nio.charset.Charset;
  38 import java.util.List;
  39 
  40 public class CompressedClassSpaceSizeInJmapHeap {
  41     // Note that on some platforms it may require root privileges to run this test.
  42     public static void main(String[] args) throws Exception {
  43         if (!Platform.is64bit()) {
  44             // Compressed Class Space is only available on 64-bit JVMs
  45             return;
  46         }
  47         if (!Platform.shouldSAAttach()) {
  48             System.out.println("SA attach not expected to work - test skipped.");
  49             return;
  50         }
  51 
  52         String pid = Integer.toString(ProcessTools.getProcessId());
  53 
  54         JDKToolLauncher jmap = JDKToolLauncher.create("jmap")
  55                                               .addToolArg("-heap")
  56                                               .addToolArg(pid);
  57         ProcessBuilder pb = new ProcessBuilder(jmap.getCommand());
  58 
  59         File out = new File("CompressedClassSpaceSizeInJmapHeap.stdout.txt");
  60         pb.redirectOutput(out);
  61 
  62         File err = new File("CompressedClassSpaceSizeInJmapHeap.stderr.txt");
  63         pb.redirectError(err);
  64 
  65         run(pb);
  66 
  67         OutputAnalyzer output = new OutputAnalyzer(read(out));
  68         output.shouldContain("CompressedClassSpaceSize = 52428800 (50.0MB)");
  69         out.delete();
  70     }
  71 
  72     private static void run(ProcessBuilder pb) throws Exception {
  73         Process p = pb.start();
  74         p.waitFor();
  75         int exitValue = p.exitValue();
  76         if (exitValue != 0) {
  77             throw new Exception("jmap -heap exited with error code: " + exitValue);
  78         }
  79     }
  80 
  81     private static String read(File f) throws Exception {
  82         Path p = f.toPath();
  83         List<String> lines = Files.readAllLines(p, Charset.defaultCharset());
  84 
  85         StringBuilder sb = new StringBuilder();
  86         for (String line : lines) {
  87             sb.append(line).append('\n');
  88         }
  89         return sb.toString();
  90     }
  91 }