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         String arch = System.getProperty("sun.arch.data.model");
  43         ProcessBuilder pb = new ProcessBuilder();
  44         pb.command(JDKToolFinder.getJDKTool("jmap"), "-J-d" + arch, "-heap", pid);
  45 
  46         File out = new File("ClassMetaspaceSizeInJmapHeap.stdout.txt");
  47         pb.redirectOutput(out);
  48 
  49         File err = new File("ClassMetaspaceSizeInJmapHeap.stderr.txt");
  50         pb.redirectError(err);
  51 
  52         run(pb);
  53 
  54         OutputAnalyzer output = new OutputAnalyzer(read(out));
  55         output.shouldContain("ClassMetaspaceSize = 52428800 (50.0MB)");
  56         out.delete();
  57     }
  58 
  59     private static void run(ProcessBuilder pb) throws Exception {
  60         Process p = pb.start();
  61         p.waitFor();
  62         int exitValue = p.exitValue();
  63         if (exitValue != 0) {
  64             throw new Exception("jmap -heap exited with error code: " + exitValue);
  65         }
  66     }
  67 
  68     private static String read(File f) throws Exception {
  69         Path p = f.toPath();
  70         List<String> lines = Files.readAllLines(p, Charset.defaultCharset());
  71 
  72         StringBuilder sb = new StringBuilder();
  73         for (String line : lines) {
  74             sb.append(line).append('\n');
  75         }
  76         return sb.toString();
  77     }
  78 }