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