undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.

test/jdk/java/util/concurrent/forkjoin/AsyncShutdownNowInvokeAny.java

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+/*
+ * Copyright (c) 2020, 2021, 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
+ * @run testng AsyncShutdownNowInvokeAny
+ * @summary A variant of AsyncShutdownNow useful for race bug hunting
+ */
+
+// TODO: reorganize all of the AsyncShutdown tests
+
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.Future;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+import org.testng.annotations.AfterClass;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+import static org.testng.Assert.*;
+
+public class AsyncShutdownNowInvokeAny {
+
+    // long running interruptible task
+    private static final Callable<Void> SLEEP_FOR_A_DAY = () -> {
+        Thread.sleep(86400_000);
+        return null;
+    };
+
+    private ScheduledExecutorService scheduledExecutor;
+
+    @BeforeClass
+    public void setup() {
+        scheduledExecutor = Executors.newScheduledThreadPool(1);
+    }
+
+    @AfterClass
+    public void teardown() {
+        scheduledExecutor.shutdown();
+    }
+
+    /**
+     * Schedule the given executor service to be shutdown abruptly after the given
+     * delay, in seconds.
+     */
+    private void scheduleShutdownNow(ExecutorService executor, int delayInSeconds) {
+        scheduledExecutor.schedule(() -> {
+            executor.shutdownNow();
+            return null;
+        }, delayInSeconds, TimeUnit.SECONDS);
+    }
+
+    /**
+     * Test shutdownNow with thread blocked in invokeAny.
+     */
+    @Test
+    public void testInvokeAny() throws Exception {
+        final int reps = 4;
+        for (int rep = 1; rep < reps; rep++) {
+            ExecutorService pool = new ForkJoinPool(1);
+            scheduleShutdownNow(pool, 5);
+            try {
+                try {
+                    // execute long running tasks
+                    pool.invokeAny(List.of(SLEEP_FOR_A_DAY, SLEEP_FOR_A_DAY));
+                    assertTrue(false);
+                } catch (ExecutionException | RejectedExecutionException e) {
+                    // expected
+                }
+            } finally {
+                pool.shutdown();
+            }
+        }
+    }
+}