1 /* 2 * Copyright (c) 2004, 2015, 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 26 * @bug 5011189 8004928 27 * @summary Unit test for java.lang.management.CompilationMXBean 28 * 29 * @modules java.management 30 * @run main/othervm -Xcomp -Xbatch Basic 31 */ 32 import java.lang.management.*; 33 34 public class Basic { 35 36 public static void main(String args[]) { 37 CompilationMXBean mb = ManagementFactory.getCompilationMXBean(); 38 if (mb == null) { 39 System.out.println("The virtual machine doesn't have a compilation system"); 40 return; 41 } 42 43 // Exercise getName() method 44 System.out.println(mb.getName()); 45 46 // If compilation time monitoring isn't supported then we are done 47 if (!mb.isCompilationTimeMonitoringSupported()) { 48 System.out.println("Compilation time monitoring not supported."); 49 return; 50 } 51 52 // Exercise getTotalCompilationTime(); 53 long time; 54 55 // If the compiler has already done some work then we are done 56 time = mb.getTotalCompilationTime(); 57 if (time > 0) { 58 printCompilationTime(time); 59 return; 60 } 61 62 // Now the hard bit - we do random work on the assumption 63 // that the compiler will be used. 64 65 System.out.println("Doing random work..."); 66 67 java.util.Locale.getAvailableLocales(); 68 java.security.Security.getProviders(); 69 java.nio.channels.spi.SelectorProvider.provider(); 70 71 time = mb.getTotalCompilationTime(); 72 if (time > 0) { 73 printCompilationTime(time); 74 } else { 75 throw new RuntimeException("getTimeCompilionTime returns 0"); 76 } 77 } 78 79 static void printCompilationTime(long time) { 80 System.out.println("Total compilation time: " + time + " ms"); 81 } 82 }