| /* |
| * Copyright (c) 2013, 2018, 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 8203766 8205641 |
| * @summary SelectionKey.interestOps does not update interest set on Windows. |
| * @author Frank Ding |
| * @run main/timeout=1200 RacyDeregister |
| */ |
| public class RacyDeregister { |
| |
| // FIXME: NUM_OUTER_LOOP_ITERATIONS 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 NUM_OUTER_LOOP_ITERATIONS = |
| System.getProperty("os.name").startsWith("Windows") ? 150 : 15; |
| |
| // 90% of 1200 second timeout as milliseconds |
| static final int TIMEOUT_THRESHOLD_MILLIS = 1200*900; |
| |
| // Time at start of main(). |
| static long t0; |
| |
| 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 { |
| t0 = System.currentTimeMillis(); |
| |
| 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 < NUM_OUTER_LOOP_ITERATIONS; k++) { |
| System.out.format("outer loop %3d at %7d ms%n", k, |
| System.currentTimeMillis() - t0); |
| System.out.flush(); |
| 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.err.printf |
| ("Notified after %d ms%n", |
| t - beginTime); |
| System.err.flush(); |
| break; |
| } |
| } |
| succTermination = false; |
| // wake up main thread doing select() |
| sel.wakeup(); |
| return; |
| } |
| } |
| } |
| } |
| long t = System.currentTimeMillis(); |
| if (t - t0 > TIMEOUT_THRESHOLD_MILLIS) { |
| System.err.format |
| ("Timeout after %d outer loop iterations%n", k); |
| System.err.flush(); |
| 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); |
| System.out.flush(); |
| 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"); |
| System.out.flush(); |
| sel.close(); |
| sc.close(); |
| break; |
| } else if (Boolean.FALSE.equals(succTermination)) { |
| System.err.println("Failed to pass the test"); |
| System.err.flush(); |
| 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(); |
| } |
| } |
| } |