1 /* 2 * Copyright (c) 2008, 2016, 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 /* 26 * @test 27 * @bug 6772683 28 * @summary Thread.isInterrupted() fails to return true on multiprocessor PC 29 * @run main/othervm InterruptedTest 100 30 */ 31 32 public class InterruptedTest { 33 34 public static void main(String[] args) throws Exception { 35 /* The value of the threshold determines for how many seconds 36 * the main thread must wait for the worker thread. On highly 37 * loaded systems it can take a while until the worker thread 38 * obtains CPU time and is able to check if it was interrupted 39 * by the main thread. The higher the threshold the likelier 40 * the worker thread can check if it was interrupted (that is 41 * required for successul test execution). 42 */ 43 int threshold = 100; 44 45 if (args.length != 1) { 46 System.out.println("Incorrect number of arguments"); 47 System.exit(1); 48 } 49 50 try { 51 threshold = Integer.parseInt(args[0]); 52 } catch (NumberFormatException e) { 53 System.out.println("Invalid argument format"); 54 System.exit(1); 55 } 56 57 if (threshold < 1) { 58 System.out.println("Threshold must be at least 1"); 59 System.exit(1); 60 } 61 62 Thread workerThread = new Thread("worker") { 63 public void run() { 64 System.out.println("Worker thread: running..."); 65 while (!Thread.currentThread().isInterrupted()) { 66 } 67 System.out.println("Worker thread: bye"); 68 } 69 }; 70 System.out.println("Main thread: starts a worker thread..."); 71 workerThread.start(); 72 System.out.println("Main thread: waits 5 seconds after starting the worker thread"); 73 workerThread.join(5000); // Wait 5 sec to let run() method to be compiled 74 75 int ntries = 0; 76 while (workerThread.isAlive() && ntries < threshold) { 77 System.out.println("Main thread: interrupts the worker thread..."); 78 workerThread.interrupt(); 79 if (workerThread.isInterrupted()) { 80 System.out.println("Main thread: worker thread is interrupted"); 81 } 82 ntries++; 83 System.out.println("Main thread: waits 1 second for the worker thread to die..."); 84 workerThread.join(1000); // Wait 1 sec and try again 85 } 86 87 if (ntries == threshold) { 88 System.out.println("Main thread: the worker thread did not die after " + 89 ntries + " seconds have elapsed"); 90 System.exit(97); 91 } 92 93 System.out.println("Main thread: bye"); 94 } 95 }