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 * 30 * @run main/othervm compiler.c2.InterruptedTest 100 31 */ 32 33 package compiler.c2; 34 35 public class InterruptedTest { 36 37 public static void main(String[] args) throws Exception { 38 /* The value of the threshold determines for how many seconds 39 * the main thread must wait for the worker thread. On highly 40 * loaded systems it can take a while until the worker thread 41 * obtains CPU time and is able to check if it was interrupted 42 * by the main thread. The higher the threshold the likelier 43 * the worker thread can check if it was interrupted (that is 44 * required for successul test execution). 45 */ 46 int threshold = 100; 47 48 if (args.length != 1) { 49 System.out.println("Incorrect number of arguments"); 50 System.exit(1); 51 } 52 53 try { 54 threshold = Integer.parseInt(args[0]); 55 } catch (NumberFormatException e) { 56 System.out.println("Invalid argument format"); 57 System.exit(1); 58 } 59 60 if (threshold < 1) { 61 System.out.println("Threshold must be at least 1"); 62 System.exit(1); 63 } 64 65 Thread workerThread = new Thread("worker") { 66 public void run() { 67 System.out.println("Worker thread: running..."); 68 while (!Thread.currentThread().isInterrupted()) { 69 } 70 System.out.println("Worker thread: bye"); 71 } 72 }; 73 System.out.println("Main thread: starts a worker thread..."); 74 workerThread.start(); 75 System.out.println("Main thread: waits 5 seconds after starting the worker thread"); 76 workerThread.join(5000); // Wait 5 sec to let run() method to be compiled 77 78 int ntries = 0; 79 while (workerThread.isAlive() && ntries < threshold) { 80 System.out.println("Main thread: interrupts the worker thread..."); 81 workerThread.interrupt(); 82 if (workerThread.isInterrupted()) { 83 System.out.println("Main thread: worker thread is interrupted"); 84 } 85 ntries++; 86 System.out.println("Main thread: waits 1 second for the worker thread to die..."); 87 workerThread.join(1000); // Wait 1 sec and try again 88 } 89 90 if (ntries == threshold) { 91 System.out.println("Main thread: the worker thread did not die after " + 92 ntries + " seconds have elapsed"); 93 System.exit(97); 94 } 95 96 System.out.println("Main thread: bye"); 97 } 98 }