1 /*
   2  * Copyright (c) 2013, 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 /*
  25  * @test CompressedClassSpaceSizeInJmapHeap
  26  * @bug 8004924
  27  * @summary Checks that jmap -heap contains the flag CompressedClassSpaceSize
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:CompressedClassSpaceSize=50m CompressedClassSpaceSizeInJmapHeap
  32  */
  33 
  34 import jdk.test.lib.JDKToolLauncher;
  35 import jdk.test.lib.Platform;
  36 import jdk.test.lib.process.OutputAnalyzer;
  37 import jdk.test.lib.process.ProcessTools;
  38 import java.nio.file.*;
  39 import java.io.File;
  40 import java.nio.charset.Charset;
  41 import java.util.List;
  42 
  43 public class CompressedClassSpaceSizeInJmapHeap {
  44     // Note that on some platforms it may require root privileges to run this test.
  45     public static void main(String[] args) throws Exception {
  46         if (!Platform.is64bit()) {
  47             // Compressed Class Space is only available on 64-bit JVMs
  48             return;
  49         }
  50         if (!Platform.shouldSAAttach()) {
  51             System.out.println("SA attach not expected to work - test skipped.");
  52             return;
  53         }
  54 
  55         String pid = Long.toString(ProcessTools.getProcessId());
  56 
  57         JDKToolLauncher jmap = JDKToolLauncher.create("jhsdb")
  58                                               .addToolArg("jmap")
  59                                               .addToolArg("--heap")
  60                                               .addToolArg("--pid")
  61                                               .addToolArg(pid);
  62         ProcessBuilder pb = new ProcessBuilder(jmap.getCommand());
  63 
  64         File out = new File("CompressedClassSpaceSizeInJmapHeap.stdout.txt");
  65         pb.redirectOutput(out);
  66 
  67         File err = new File("CompressedClassSpaceSizeInJmapHeap.stderr.txt");
  68         pb.redirectError(err);
  69 
  70         run(pb);
  71 
  72         OutputAnalyzer output = new OutputAnalyzer(read(out));
  73         output.shouldContain("CompressedClassSpaceSize = 52428800 (50.0MB)");
  74         out.delete();
  75     }
  76 
  77     private static void run(ProcessBuilder pb) throws Exception {
  78         Process p = pb.start();
  79         p.waitFor();
  80         int exitValue = p.exitValue();
  81         if (exitValue != 0) {
  82             throw new Exception("jmap -heap exited with error code: " + exitValue);
  83         }
  84     }
  85 
  86     private static String read(File f) throws Exception {
  87         Path p = f.toPath();
  88         List<String> lines = Files.readAllLines(p, Charset.defaultCharset());
  89 
  90         StringBuilder sb = new StringBuilder();
  91         for (String line : lines) {
  92             sb.append(line).append('\n');
  93         }
  94         return sb.toString();
  95     }
  96 }