| /* |
| * Copyright (c) 2007, 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 6523756 |
| * @summary Race task submission against shutdownNow |
| * @author Martin Buchholz |
| */ |
| |
| // For extra chances to detect shutdownNow vs. execute races, |
| // crank up the iterations to, say 1<<22 and |
| // add a call to Thread.yield() before the call to t.start() |
| // in ThreadPoolExecutor.addWorker. |
| |
| import java.util.*; |
| import java.util.concurrent.*; |
| |
| public class ShutdownNowExecuteRace { |
| static volatile boolean quit = false; |
| static volatile ThreadPoolExecutor pool = null; |
| |
| final static Runnable sleeper = new Runnable() { public void run() { |
| final long ONE_HOUR = 1000L * 60L * 60L; |
| try { Thread.sleep(ONE_HOUR); } |
| catch (InterruptedException ie) {} |
| catch (Throwable t) { unexpected(t); }}}; |
| |
| static void realMain(String[] args) throws Throwable { |
| final int iterations = 1 << 8; |
| Thread thread = new Thread() { public void run() { |
| while (! quit) { |
| ThreadPoolExecutor pool = ShutdownNowExecuteRace.pool; |
| if (pool != null) |
| try { pool.execute(sleeper); } |
| catch (RejectedExecutionException e) {/* OK */} |
| catch (Throwable t) { unexpected(t); }}}}; |
| thread.start(); |
| for (int i = 0; i < iterations; i++) { |
| pool = new ThreadPoolExecutor( |
| 10, 10, 3L, TimeUnit.DAYS, |
| new ArrayBlockingQueue<Runnable>(10)); |
| pool.shutdownNow(); |
| check(pool.awaitTermination(3L, TimeUnit.MINUTES)); |
| } |
| quit = true; |
| thread.join(); |
| } |
| |
| //--------------------- 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");} |
| private static abstract class Fun {abstract void f() throws Throwable;} |
| static void THROWS(Class<? extends Throwable> k, Fun... fs) { |
| for (Fun f : fs) |
| try { f.f(); fail("Expected " + k.getName() + " not thrown"); } |
| catch (Throwable t) { |
| if (k.isAssignableFrom(t.getClass())) pass(); |
| else unexpected(t);}} |
| private static abstract class CheckedThread extends Thread { |
| abstract void realRun() throws Throwable; |
| public void run() { |
| try {realRun();} catch (Throwable t) {unexpected(t);}}} |
| } |