ExplicitSet.java revision 6144
a747113422afaa29ce72d2c5ba7f0b7ea9ec2054Evan Hunt/*
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt *
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * This code is free software; you can redistribute it and/or modify it
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * under the terms of the GNU General Public License version 2 only, as
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * published by the Free Software Foundation.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt *
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * This code is distributed in the hope that it will be useful, but WITHOUT
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * version 2 for more details (a copy is included in the LICENSE file that
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * accompanied this code).
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt *
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * You should have received a copy of the GNU General Public License version
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ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt *
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * questions.
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt */
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt/*
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * @test
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * @bug 7132378
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * @summary Race in FutureTask if used with explicit set ( not Runnable )
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt * @author Chris Hegarty
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt */
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Huntimport java.util.concurrent.Callable;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Huntimport java.util.concurrent.FutureTask;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Huntpublic class ExplicitSet {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt static void realMain(String[] args) throws Throwable {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt for (int i = 1; i <= 10000; i++) {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt //System.out.print(".");
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt test();
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt }
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt }
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt static void test() throws Throwable {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt final SettableTask task = new SettableTask();
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt Thread thread = new Thread() { public void run() {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt try {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt check(task.get() != null);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt } catch (Exception e) { unexpected(e); }
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt }};
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt thread.start();
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt task.set(Boolean.TRUE);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt thread.join(5000);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt }
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt static class SettableTask extends FutureTask<Boolean> {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt SettableTask() {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt super(new Callable<Boolean>() {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt public Boolean call() {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt fail ("The task should never be run!");
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt return null;
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt };
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt });
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt }
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt @Override
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt public void set(Boolean b) {
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt super.set(b);
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt }
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt }
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt //--------------------- Infrastructure ---------------------------
ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt 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");}
}