1 /* 2 * Copyright (c) 2005, 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 4519200 27 * @summary Confirm a Thread.stop before start complies with the spec 28 * @author Pete Soper 29 * 30 * Confirm that a thread that had its stop method invoked before start 31 * does properly terminate with expected exception behavior. NOTE that 32 * arbitrary application threads could return from their run methods faster 33 * than the VM can throw an async exception. 34 */ 35 public class StopBeforeStart { 36 37 private static final int JOIN_TIMEOUT=10000; 38 39 private class MyThrowable extends Throwable { 40 } 41 42 private class Catcher implements Thread.UncaughtExceptionHandler { 43 private boolean nullaryStop; 44 private Throwable theThrowable; 45 private Throwable expectedThrowable; 46 private boolean exceptionThrown; 47 48 Catcher(boolean nullaryStop) { 49 this.nullaryStop = nullaryStop; 50 if (!nullaryStop) { 51 expectedThrowable = new MyThrowable(); 52 } 53 } 54 55 public void uncaughtException(Thread t, Throwable th) { 56 exceptionThrown = true; 57 theThrowable = th; 58 } 59 60 void check(String label) throws Throwable { 61 if (!exceptionThrown) { 62 throw new RuntimeException(label + 63 " test:" + " missing uncaught exception"); 64 } 65 66 if (nullaryStop) { 67 if (! (theThrowable instanceof ThreadDeath)) { 68 throw new RuntimeException(label + 69 " test:" + " expected ThreadDeath in uncaught handler"); 70 } 71 } else if (theThrowable != expectedThrowable) { 72 throw new RuntimeException(label + 73 " test:" + " wrong Throwable in uncaught handler"); 74 } 75 } 76 } 77 78 private class MyRunnable implements Runnable { 79 public void run() { 80 while(true) 81 ; 82 } 83 } 84 85 private class MyThread extends Thread { 86 public void run() { 87 while(true) 88 ; 89 } 90 } 91 92 93 public static void main(String args[]) throws Throwable { 94 (new StopBeforeStart()).doit(); 95 System.out.println("Test passed"); 96 } 97 98 private void doit() throws Throwable { 99 100 runit(false, new Thread(new MyRunnable()),"Thread"); 101 runit(true, new Thread(new MyRunnable()),"Thread"); 102 runit(false, new MyThread(),"Runnable"); 103 runit(true, new MyThread(),"Runnable"); 104 } 105 106 private void runit(boolean nullaryStop, Thread thread, 107 String type) throws Throwable { 108 109 Catcher c = new Catcher(nullaryStop); 110 thread.setUncaughtExceptionHandler(c); 111 112 if (nullaryStop) { 113 thread.stop(); 114 } else { 115 thread.stop(c.expectedThrowable); 116 } 117 118 thread.start(); 119 thread.join(JOIN_TIMEOUT); 120 121 if (thread.getState() != Thread.State.TERMINATED) { 122 123 thread.stop(); 124 125 // Under high load this could be a false positive 126 throw new RuntimeException(type + 127 " test:" + " app thread did not terminate"); 128 } 129 130 c.check(type); 131 } 132 } --- EOF ---