--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/util/concurrent/ThreadPoolExecutor/ShutdownNowExecuteRace.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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);}}}
+}