--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/nio/channels/Selector/RacyDeregister.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2013, 2016, 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.
+ */
+
+/*
+ * Portions Copyright (c) 2012 IBM Corporation
+ */
+
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.Selector;
+import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.SocketChannel;
+
+/*
+ * @test
+ * @bug 6429204
+ * @summary SelectionKey.interestOps does not update interest set on Windows.
+ * @author Frank Ding
+ */
+public class RacyDeregister {
+
+ // FIXME: numOuterLoopIterations should be reverted to the hard-coded value
+ // 15 when JDK-8161083 is resolved as either a bug or a non-issue.
+ static final int numOuterLoopIterations =
+ System.getProperty("os.name").startsWith("Windows") ? 150 : 15;
+
+ static boolean notified;
+ static final Object selectorLock = new Object();
+ static final Object notifyLock = new Object();
+ /**
+ * null: not terminated
+ * true: passed
+ * false: failed
+ */
+ static volatile Boolean succTermination = null;
+
+ public static void main(String[] args) throws Exception {
+ InetAddress addr = InetAddress.getByName(null);
+ ServerSocketChannel sc = ServerSocketChannel.open();
+ sc.socket().bind(new InetSocketAddress(addr, 0));
+
+ SocketChannel.open(new InetSocketAddress(addr,
+ sc.socket().getLocalPort()));
+
+ SocketChannel accepted = sc.accept();
+ accepted.configureBlocking(false);
+
+ SocketChannel.open(new InetSocketAddress(addr,
+ sc.socket().getLocalPort()));
+ SocketChannel accepted2 = sc.accept();
+ accepted2.configureBlocking(false);
+
+ final Selector sel = Selector.open();
+ SelectionKey key2 = accepted2.register(sel, SelectionKey.OP_READ);
+ final SelectionKey[] key = new SelectionKey[]{
+ accepted.register(sel, SelectionKey.OP_READ)};
+
+
+ // thread that will be changing key[0].interestOps to OP_READ | OP_WRITE
+ new Thread() {
+
+ public void run() {
+ try {
+ for (int k = 0; k < numOuterLoopIterations; k++) {
+ for (int i = 0; i < 10000; i++) {
+ synchronized (notifyLock) {
+ synchronized (selectorLock) {
+ sel.wakeup();
+ key[0].interestOps(SelectionKey.OP_READ
+ | SelectionKey.OP_WRITE);
+ }
+ notified = false;
+ long beginTime = System.currentTimeMillis();
+ while (true) {
+ notifyLock.wait(5000);
+ if (notified) {
+ break;
+ }
+ long endTime = System.currentTimeMillis();
+ if (endTime - beginTime > 5000) {
+ for (int j = 0; j < 60; j++) {
+ Thread.sleep(1000);
+ if (notified) {
+ long t =
+ System.currentTimeMillis();
+ System.out.printf
+ ("Notified after %d ms%n",
+ t - beginTime);
+ break;
+ }
+ }
+ succTermination = false;
+ // wake up main thread doing select()
+ sel.wakeup();
+ return;
+ }
+ }
+ }
+ }
+ }
+ succTermination = true;
+ // wake up main thread doing select()
+ sel.wakeup();
+ } catch (Exception e) {
+ System.out.println(e);
+ succTermination = true;
+ // wake up main thread doing select()
+ sel.wakeup();
+ }
+ }
+ }.start();
+
+ // main thread will be doing registering/deregistering with the sel
+ while (true) {
+ sel.select();
+ if (Boolean.TRUE.equals(succTermination)) {
+ System.out.println("Test passed");
+ sel.close();
+ sc.close();
+ break;
+ } else if (Boolean.FALSE.equals(succTermination)) {
+ System.out.println("Failed to pass the test");
+ sel.close();
+ sc.close();
+ throw new RuntimeException("Failed to pass the test");
+ }
+ synchronized (selectorLock) {
+ }
+ if (sel.selectedKeys().contains(key[0]) && key[0].isWritable()) {
+ synchronized (notifyLock) {
+ notified = true;
+ notifyLock.notify();
+ key[0].cancel();
+ sel.selectNow();
+ key2 = accepted2.register(sel, SelectionKey.OP_READ);
+ key[0] = accepted.register(sel, SelectionKey.OP_READ);
+ }
+ }
+ key2.cancel();
+ sel.selectedKeys().clear();
+ }
+ }
+}