1 /*
2 * Copyright (c) 2007, 2010, 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 6523756
27 * @summary Race task submission against shutdownNow
28 * @author Martin Buchholz
29 */
30
31 // For extra chances to detect shutdownNow vs. execute races,
32 // crank up the iterations to, say 1<<22 and
33 // add a call to Thread.yield() before the call to t.start()
34 // in ThreadPoolExecutor.addWorker.
35
36 import java.util.*;
37 import java.util.concurrent.*;
38
39 public class ShutdownNowExecuteRace {
40 static volatile boolean quit = false;
41 static volatile ThreadPoolExecutor pool = null;
42
43 static final Runnable sleeper = new Runnable() { public void run() {
44 final long ONE_HOUR = 1000L * 60L * 60L;
45 try { Thread.sleep(ONE_HOUR); }
46 catch (InterruptedException ie) {}
47 catch (Throwable t) { unexpected(t); }}};
48
49 static void realMain(String[] args) throws Throwable {
50 final int iterations = 1 << 8;
51 Thread thread = new Thread() { public void run() {
52 while (! quit) {
53 ThreadPoolExecutor pool = ShutdownNowExecuteRace.pool;
54 if (pool != null)
55 try { pool.execute(sleeper); }
56 catch (RejectedExecutionException e) {/* OK */}
57 catch (Throwable t) { unexpected(t); }}}};
58 thread.start();
59 for (int i = 0; i < iterations; i++) {
60 pool = new ThreadPoolExecutor(
61 10, 10, 3L, TimeUnit.DAYS,
62 new ArrayBlockingQueue<Runnable>(10));
63 pool.shutdownNow();
64 check(pool.awaitTermination(3L, TimeUnit.MINUTES));
65 }
66 quit = true;
67 thread.join();
68 }
69
70 //--------------------- Infrastructure ---------------------------
71 static volatile int passed = 0, failed = 0;
72 static void pass() {passed++;}
73 static void fail() {failed++; Thread.dumpStack();}
74 static void fail(String msg) {System.out.println(msg); fail();}
75 static void unexpected(Throwable t) {failed++; t.printStackTrace();}
76 static void check(boolean cond) {if (cond) pass(); else fail();}
77 static void equal(Object x, Object y) {
78 if (x == null ? y == null : x.equals(y)) pass();
79 else fail(x + " not equal to " + y);}
80 public static void main(String[] args) throws Throwable {
81 try {realMain(args);} catch (Throwable t) {unexpected(t);}
82 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
83 if (failed > 0) throw new AssertionError("Some tests failed");}
84 private abstract static class Fun {abstract void f() throws Throwable;}
85 static void THROWS(Class<? extends Throwable> k, Fun... fs) {
86 for (Fun f : fs)
87 try { f.f(); fail("Expected " + k.getName() + " not thrown"); }
88 catch (Throwable t) {
89 if (k.isAssignableFrom(t.getClass())) pass();
90 else unexpected(t);}}
91 private abstract static class CheckedThread extends Thread {
92 abstract void realRun() throws Throwable;
93 public void run() {
94 try {realRun();} catch (Throwable t) {unexpected(t);}}}
95 }