1/*
2 * Copyright (c) 2012, 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 7132378
27 * @summary Race in FutureTask if used with explicit set ( not Runnable )
28 * @author Chris Hegarty
29 */
30
31import java.util.concurrent.Callable;
32import java.util.concurrent.FutureTask;
33
34public class ExplicitSet {
35
36    static void realMain(String[] args) throws Throwable {
37        for (int i = 1; i <= 10000; i++) {
38            //System.out.print(".");
39            test();
40        }
41    }
42
43    static void test() throws Throwable {
44        final SettableTask task = new SettableTask();
45
46        Thread thread = new Thread() { public void run() {
47            try {
48                check(task.get() != null);
49            } catch (Exception e) { unexpected(e); }
50        }};
51        thread.start();
52
53        task.set(Boolean.TRUE);
54        thread.join(5000);
55    }
56
57    static class SettableTask extends FutureTask<Boolean> {
58        SettableTask() {
59            super(new Callable<Boolean>() {
60                    public Boolean call() {
61                        fail("The task should never be run!");
62                        return null;
63                    };
64                });
65        }
66
67        @Override
68        public void set(Boolean b) {
69            super.set(b);
70        }
71    }
72
73    //--------------------- Infrastructure ---------------------------
74    static volatile int passed = 0, failed = 0;
75    static void pass() {passed++;}
76    static void fail() {failed++; Thread.dumpStack();}
77    static void fail(String msg) {System.out.println(msg); fail();}
78    static void unexpected(Throwable t) {failed++; t.printStackTrace();}
79    static void check(boolean cond) {if (cond) pass(); else fail();}
80    static void equal(Object x, Object y) {
81        if (x == null ? y == null : x.equals(y)) pass();
82        else fail(x + " not equal to " + y);}
83    public static void main(String[] args) throws Throwable {
84        try {realMain(args);} catch (Throwable t) {unexpected(t);}
85        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
86        if (failed > 0) throw new AssertionError("Some tests failed");}
87}
88