| /* |
| * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 7132378 |
| * @summary Race in FutureTask if used with explicit set ( not Runnable ) |
| * @author Chris Hegarty |
| */ |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.FutureTask; |
| |
| public class ExplicitSet { |
| |
| static void realMain(String[] args) throws Throwable { |
| for (int i = 1; i <= 10000; i++) { |
| //System.out.print("."); |
| test(); |
| } |
| } |
| |
| static void test() throws Throwable { |
| final SettableTask task = new SettableTask(); |
| |
| Thread thread = new Thread() { public void run() { |
| try { |
| check(task.get() != null); |
| } catch (Exception e) { unexpected(e); } |
| }}; |
| thread.start(); |
| |
| task.set(Boolean.TRUE); |
| thread.join(5000); |
| } |
| |
| static class SettableTask extends FutureTask<Boolean> { |
| SettableTask() { |
| super(new Callable<Boolean>() { |
| public Boolean call() { |
| fail("The task should never be run!"); |
| return null; |
| }; |
| }); |
| } |
| |
| @Override |
| public void set(Boolean b) { |
| super.set(b); |
| } |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| static volatile int passed = 0, failed = 0; |
| static void pass() {passed++;} |
| static void fail() {failed++; Thread.dumpStack();} |
| static void fail(String msg) {System.out.println(msg); fail();} |
| static void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| static void check(boolean cond) {if (cond) pass(); else fail();} |
| static void equal(Object x, Object y) { |
| if (x == null ? y == null : x.equals(y)) pass(); |
| else fail(x + " not equal to " + y);} |
| public static void main(String[] args) throws Throwable { |
| try {realMain(args);} catch (Throwable t) {unexpected(t);} |
| System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| if (failed > 0) throw new AssertionError("Some tests failed");} |
| } |