1 /*
   2  * Copyright (c) 2003, 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     4929401
  27  * @summary ThreadMXBean.getThreadCpuTime() throws IllegalArgumentException
  28  *          if id <= 0 and returns -1 if the thread doesn't exist.
  29  * @author  Mandy Chung
  30  *
  31  * @modules java.management
  32  * @run main InvalidThreadID
  33  */
  34 
  35 import java.lang.management.ThreadMXBean;
  36 import java.lang.management.ManagementFactory;
  37 
  38 public class InvalidThreadID {
  39 
  40     public static void main(String argv[]) {
  41 
  42         ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
  43         int cnt = 0;
  44         long [] idArr = {0, -1, -2, (Long.MIN_VALUE + 1), Long.MIN_VALUE};
  45 
  46         if (mbean.isThreadCpuTimeSupported()) {
  47             for (int i = 0; i < idArr.length; i++) {
  48                 try {
  49                     mbean.getThreadCpuTime(idArr[i]);
  50                     System.out.println("Test failed. IllegalArgumentException" +
  51                         " expected for ID = " + idArr[i]);
  52                 } catch (IllegalArgumentException iae) {
  53                     cnt++;
  54                 }
  55             }
  56             if (cnt != idArr.length) {
  57                 throw new RuntimeException("Unexpected number of " +
  58                     "IllegalArgumentException = " + cnt +
  59                     " expected = " + idArr.length);
  60             }
  61 
  62             // CPU time for a non-existence thread
  63             long time = mbean.getThreadCpuTime(999999);
  64             if (time < 0 && time != -1) {
  65                 throw new RuntimeException("Cpu time for thread 999999" +
  66                     " is invalid = " + time + " expected to be -1.");
  67             }
  68         }
  69         System.out.println("Test passed.");
  70     }
  71 }