1 /*
   2  * Copyright (c) 2013, 2018, 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
  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
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  23 
  24 /**
  25  * @test CompressedClassSpaceSizeInJmapHeap
  26  * @bug 8004924
  27  * @summary Checks that jmap -heap contains the flag CompressedClassSpaceSize
  28  * @requires vm.hasSAandCanAttach 
  29  * @requires vm.bits == 64 & vm.opt.final.UseCompressedOops == true
  30  * @library /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:CompressedClassSpaceSize=50m CompressedClassSpaceSizeInJmapHeap
  34  */
  35 
  36 import jdk.test.lib.JDKToolLauncher;
  37 import jdk.test.lib.Platform;
  38 import jdk.test.lib.process.OutputAnalyzer;
  39 import jdk.test.lib.process.ProcessTools;
  40 import java.nio.file.*;
  41 import java.io.File;
  42 import java.nio.charset.Charset;
  43 import java.util.List;
  44 
  45 public class CompressedClassSpaceSizeInJmapHeap {
  46     // Note that on some platforms it may require root privileges to run this test.
  47     public static void main(String[] args) throws Exception {
  48         if (!Platform.is64bit()) {
  49             // Compressed Class Space is only available on 64-bit JVMs
  50             return;
  51         }
  52 
  53         String pid = Long.toString(ProcessTools.getProcessId());
  54 
  55         JDKToolLauncher jmap = JDKToolLauncher.create("jhsdb")
  56                                               .addToolArg("jmap")
  57                                               .addToolArg("--heap")
  58                                               .addToolArg("--pid")
  59                                               .addToolArg(pid);
  60         ProcessBuilder pb = new ProcessBuilder(jmap.getCommand());
  61 
  62         File out = new File("CompressedClassSpaceSizeInJmapHeap.stdout.txt");
  63         pb.redirectOutput(out);
  64 
  65         File err = new File("CompressedClassSpaceSizeInJmapHeap.stderr.txt");
  66         pb.redirectError(err);
  67 
  68         run(pb);
  69 
  70         OutputAnalyzer output = new OutputAnalyzer(read(out));
  71         output.shouldContain("CompressedClassSpaceSize = 52428800 (50.0MB)");
  72         out.delete();
  73     }
  74 
  75     private static void run(ProcessBuilder pb) throws Exception {
  76         Process p = pb.start();
  77         p.waitFor();
  78         int exitValue = p.exitValue();
  79         if (exitValue != 0) {
  80             throw new Exception("jmap -heap exited with error code: " + exitValue);
  81         }
  82     }
  83 
  84     private static String read(File f) throws Exception {
  85         Path p = f.toPath();
  86         List<String> lines = Files.readAllLines(p, Charset.defaultCharset());
  87 
  88         StringBuilder sb = new StringBuilder();
  89         for (String line : lines) {
  90             sb.append(line).append('\n');
  91         }
  92         return sb.toString();
  93     }
  94 }