1 /*
   2  * Copyright (c) 2013, 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 ClassMetaspaceSizeInJmapHeap
  26  * @bug 8004924
  27  * @summary Checks that jmap -heap contains the flag ClassMetaspaceSize
  28  * @library /testlibrary
  29  * @run main/othervm -XX:ClassMetaspaceSize=50m ClassMetaspaceSizeInJmapHeap
  30  */
  31 
  32 import com.oracle.java.testlibrary.*;
  33 import java.nio.file.*;
  34 import java.io.File;
  35 import java.nio.charset.Charset;
  36 import java.util.List;
  37 
  38 public class ClassMetaspaceSizeInJmapHeap {
  39     public static void main(String[] args) throws Exception {
  40         String pid = Integer.toString(ProcessTools.getProcessId());
  41 
  42         JDKToolLauncher jmap = JDKToolLauncher.create("jmap")
  43                                               .addToolArg("-heap")
  44                                               .addToolArg(pid);
  45         ProcessBuilder pb = new ProcessBuilder(jmap.getCommand());
  46 
  47         File out = new File("ClassMetaspaceSizeInJmapHeap.stdout.txt");
  48         pb.redirectOutput(out);
  49 
  50         File err = new File("ClassMetaspaceSizeInJmapHeap.stderr.txt");
  51         pb.redirectError(err);
  52 
  53         run(pb);
  54 
  55         OutputAnalyzer output = new OutputAnalyzer(read(out));
  56         output.shouldContain("ClassMetaspaceSize = 52428800 (50.0MB)");
  57         out.delete();
  58     }
  59 
  60     private static void run(ProcessBuilder pb) throws Exception {
  61         Process p = pb.start();
  62         p.waitFor();
  63         int exitValue = p.exitValue();
  64         if (exitValue != 0) {
  65             throw new Exception("jmap -heap exited with error code: " + exitValue);
  66         }
  67     }
  68 
  69     private static String read(File f) throws Exception {
  70         Path p = f.toPath();
  71         List<String> lines = Files.readAllLines(p, Charset.defaultCharset());
  72 
  73         StringBuilder sb = new StringBuilder();
  74         for (String line : lines) {
  75             sb.append(line).append('\n');
  76         }
  77         return sb.toString();
  78     }
  79 }