1 /* 2 * Copyright (c) 2003, 2004, 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 * @run main InvalidThreadID 32 */ 33 34 import java.lang.management.ThreadMXBean; 35 import java.lang.management.ManagementFactory; 36 37 public class InvalidThreadID { 38 39 public static void main(String argv[]) { 40 41 ThreadMXBean mbean = ManagementFactory.getThreadMXBean(); 42 int cnt = 0; 43 long [] idArr = {0, -1, -2, (Long.MIN_VALUE + 1), Long.MIN_VALUE}; 44 45 if (mbean.isThreadCpuTimeSupported()) { 46 for (int i = 0; i < idArr.length; i++) { 47 try { 48 mbean.getThreadCpuTime(idArr[i]); 49 System.out.println("Test failed. IllegalArgumentException" + 50 " expected for ID = " + idArr[i]); 51 } catch (IllegalArgumentException iae) { 52 cnt++; 53 } 54 } 55 if (cnt != idArr.length) { 56 throw new RuntimeException("Unexpected number of " + 57 "IllegalArgumentException = " + cnt + 58 " expected = " + idArr.length); 59 } 60 61 // CPU time for a non-existence thread 62 long time = mbean.getThreadCpuTime(999999); 63 if (time < 0 && time != -1) { 64 throw new RuntimeException("Cpu time for thread 999999" + 65 " is invalid = " + time + " expected to be -1."); 66 } 67 } 68 System.out.println("Test passed."); 69 } 70 }