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/nio/channels/AsynchronousChannelGroup/Unbounded.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2008, 2013, 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 4607272 6842687
+ * @summary Unit test for AsynchronousChannelGroup
+ */
+
+import java.nio.ByteBuffer;
+import java.nio.channels.*;
+import java.net.*;
+import java.util.concurrent.*;
+import java.io.IOException;
+
+public class Unbounded {
+    // number of concurrent completion handlers
+    static final int CONCURRENCY_COUNT = 256;
+
+    // set to true if an I/O operation fails
+    static volatile boolean failed;
+
+    // set to true when the test is done
+    static volatile boolean finished;
+
+    public static void main(String[] args) throws Exception {
+        // create listener to accept connections
+        AsynchronousServerSocketChannel listener =
+            AsynchronousServerSocketChannel.open()
+                .bind(new InetSocketAddress(0));
+
+        // establish connections
+
+        AsynchronousSocketChannel[] clients = new AsynchronousSocketChannel[CONCURRENCY_COUNT];
+        AsynchronousSocketChannel[] peers = new AsynchronousSocketChannel[CONCURRENCY_COUNT];
+
+        int port = ((InetSocketAddress)(listener.getLocalAddress())).getPort();
+        SocketAddress sa = new InetSocketAddress(InetAddress.getLocalHost(), port);
+
+        for (int i=0; i<CONCURRENCY_COUNT; i++) {
+            clients[i] = AsynchronousSocketChannel.open();
+            Future<Void> result = clients[i].connect(sa);
+            peers[i] = listener.accept().get();
+            result.get();
+        }
+        System.out.println("All connection established.");
+
+        // the barrier where all threads (plus the main thread) wait
+        final CyclicBarrier barrier = new CyclicBarrier(CONCURRENCY_COUNT+1);
+
+        // initiate a read operation on each channel.
+        for (AsynchronousSocketChannel client: clients) {
+            ByteBuffer buf = ByteBuffer.allocateDirect(100);
+            client.read(buf, client,
+                new CompletionHandler<Integer,AsynchronousSocketChannel>() {
+                    public void completed(Integer bytesRead, AsynchronousSocketChannel ch) {
+                        try {
+                            ch.close();
+                            barrier.await();
+                        } catch (Exception x) {
+                            throw new AssertionError(x);
+                        }
+                    }
+                    public void failed(Throwable exc, AsynchronousSocketChannel ch) {
+                        failed = true;
+                        System.err.println("read failed: " + exc);
+                        completed(0, ch);
+                    }
+                });
+        }
+        System.out.println("All read operations outstanding.");
+
+        // write data to each of the accepted connections
+        for (AsynchronousSocketChannel peer: peers) {
+            peer.write(ByteBuffer.wrap("welcome".getBytes())).get();
+            peer.shutdownOutput();
+            peer.close();
+        }
+
+        // wait for all threads to reach the barrier
+        System.out.println("Waiting for all threads to reach barrier");
+        barrier.await();
+
+        // finish up
+        finished = true;
+        listener.close();
+        if (failed)
+            throw new RuntimeException("I/O operation failed, see log for details");
+    }
+}