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 CompressedClassSpaceSizeInJmapHeap 26 * @bug 8004924 27 * @summary Checks that jmap -heap contains the flag CompressedClassSpaceSize 28 * @library /testlibrary 29 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:CompressedClassSpaceSize=50m CompressedClassSpaceSizeInJmapHeap 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 CompressedClassSpaceSizeInJmapHeap { 39 public static void main(String[] args) throws Exception { 40 if (!Platform.is64bit()) { 41 // Compressed Class Space is only available on 64-bit JVMs 42 return; 43 } 44 45 String pid = Integer.toString(ProcessTools.getProcessId()); 46 47 JDKToolLauncher jmap = JDKToolLauncher.create("jmap") 48 .addToolArg("-heap") 49 .addToolArg(pid); 50 ProcessBuilder pb = new ProcessBuilder(jmap.getCommand()); 51 52 File out = new File("CompressedClassSpaceSizeInJmapHeap.stdout.txt"); 53 pb.redirectOutput(out); 54 55 File err = new File("CompressedClassSpaceSizeInJmapHeap.stderr.txt"); 56 pb.redirectError(err); 57 58 run(pb); 59 60 OutputAnalyzer output = new OutputAnalyzer(read(out)); 61 output.shouldContain("CompressedClassSpaceSize = 52428800 (50.0MB)"); 62 out.delete(); 63 } 64 65 private static void run(ProcessBuilder pb) throws Exception { 66 Process p = pb.start(); 67 p.waitFor(); 68 int exitValue = p.exitValue(); 69 if (exitValue != 0) { 70 throw new Exception("jmap -heap exited with error code: " + exitValue); 71 } 72 } 73 74 private static String read(File f) throws Exception { 75 Path p = f.toPath(); 76 List<String> lines = Files.readAllLines(p, Charset.defaultCharset()); 77 78 StringBuilder sb = new StringBuilder(); 79 for (String line : lines) { 80 sb.append(line).append('\n'); 81 } 82 return sb.toString(); 83 } 84 }