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