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 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 }