8336339: (se) SelectionKey.interestOps(int) should not throw ClosedSelectorException

Reviewed-by: jpai, bpb
This commit is contained in:
Alan Bateman 2024-07-23 05:13:49 +00:00
parent 22914e0774
commit 9f03f68755
8 changed files with 136 additions and 34 deletions
src/java.base
linux/classes/sun/nio/ch
macosx/classes/sun/nio/ch
share/classes
unix/classes/sun/nio/ch
windows/classes/sun/nio/ch
test/jdk/java/nio/channels/Selector

@ -26,7 +26,6 @@
package sun.nio.ch;
import java.io.IOException;
import java.nio.channels.ClosedSelectorException;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.spi.SelectorProvider;
@ -92,11 +91,6 @@ class EPollSelectorImpl extends SelectorImpl {
EPoll.ctl(epfd, EPOLL_CTL_ADD, eventfd.efd(), EPOLLIN);
}
private void ensureOpen() {
if (!isOpen())
throw new ClosedSelectorException();
}
@Override
protected int doSelect(Consumer<SelectionKey> action, long timeout)
throws IOException
@ -243,7 +237,6 @@ class EPollSelectorImpl extends SelectorImpl {
@Override
public void setEventOps(SelectionKeyImpl ski) {
ensureOpen();
synchronized (updateLock) {
updateKeys.addLast(ski);
}

@ -26,7 +26,6 @@
package sun.nio.ch;
import java.io.IOException;
import java.nio.channels.ClosedSelectorException;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.spi.SelectorProvider;
@ -97,11 +96,6 @@ class KQueueSelectorImpl extends SelectorImpl {
KQueue.register(kqfd, fd0, EVFILT_READ, EV_ADD);
}
private void ensureOpen() {
if (!isOpen())
throw new ClosedSelectorException();
}
@Override
protected int doSelect(Consumer<SelectionKey> action, long timeout)
throws IOException
@ -285,7 +279,6 @@ class KQueueSelectorImpl extends SelectorImpl {
@Override
public void setEventOps(SelectionKeyImpl ski) {
ensureOpen();
synchronized (updateLock) {
updateKeys.addLast(ski);
}

@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2024, 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
@ -137,6 +137,8 @@ public abstract class AbstractSelectableChannel
void removeKey(SelectionKey k) { // package-private
synchronized (keyLock) {
if (keys == null)
return;
for (int i = 0; i < keys.length; i++)
if (keys[i] == k) {
keys[i] = null;
@ -233,7 +235,7 @@ public abstract class AbstractSelectableChannel
k.interestOps(ops);
} else {
// New registration
k = ((AbstractSelector)sel).register(this, ops, att);
k = ((AbstractSelector) sel).register(this, ops, att);
addKey(k);
}
return k;

@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2024, 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
@ -188,11 +188,11 @@ public abstract class SelectorImpl
// Deregister channels
Iterator<SelectionKey> i = keys.iterator();
while (i.hasNext()) {
SelectionKeyImpl ski = (SelectionKeyImpl)i.next();
SelectionKeyImpl ski = (SelectionKeyImpl) i.next();
deregister(ski);
SelectableChannel selch = ski.channel();
if (!selch.isOpen() && !selch.isRegistered())
((SelChImpl)selch).kill();
((SelChImpl) selch).kill();
selectedKeys.remove(ski);
i.remove();
}
@ -221,13 +221,14 @@ public abstract class SelectorImpl
keys.add(k);
try {
k.interestOps(ops);
} catch (ClosedSelectorException e) {
} catch (CancelledKeyException e) {
// key observed and cancelled. Okay to return a cancelled key.
}
if (!isOpen()) {
assert ch.keyFor(this) == null;
keys.remove(k);
k.cancel();
throw e;
} catch (CancelledKeyException e) {
// key observed and cancelled. Okay to return a cancelled key.
throw new ClosedSelectorException();
}
return k;
}
@ -277,7 +278,7 @@ public abstract class SelectorImpl
SelectableChannel ch = ski.channel();
if (!ch.isOpen() && !ch.isRegistered())
((SelChImpl)ch).kill();
((SelChImpl) ch).kill();
}
}
}

@ -231,7 +231,6 @@ class PollSelectorImpl extends SelectorImpl {
@Override
public void setEventOps(SelectionKeyImpl ski) {
ensureOpen();
synchronized (updateLock) {
updateKeys.addLast(ski);
}

@ -28,7 +28,6 @@ package sun.nio.ch;
import java.io.FileDescriptor;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedSelectorException;
import java.nio.channels.Pipe;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
@ -89,11 +88,6 @@ class WEPollSelectorImpl extends SelectorImpl {
WEPoll.ctl(eph, EPOLL_CTL_ADD, fd0Val, WEPoll.EPOLLIN);
}
private void ensureOpen() {
if (!isOpen())
throw new ClosedSelectorException();
}
@Override
protected int doSelect(Consumer<SelectionKey> action, long timeout)
throws IOException
@ -228,7 +222,6 @@ class WEPollSelectorImpl extends SelectorImpl {
@Override
public void setEventOps(SelectionKeyImpl ski) {
ensureOpen();
synchronized (updateLock) {
updateKeys.addLast(ski);
}

@ -1,5 +1,5 @@
/*
* Copyright (c) 2002, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2002, 2024, 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
@ -606,7 +606,6 @@ class WindowsSelectorImpl extends SelectorImpl {
@Override
public void setEventOps(SelectionKeyImpl ski) {
ensureOpen();
synchronized (updateLock) {
updateKeys.addLast(ski);
}

@ -0,0 +1,122 @@
/*
* Copyright (c) 2024, 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 8336339
* @summary Race registration and selection key updates with Selector.close
* @run junit RaceUpdatesAndClose
*/
import java.nio.channels.CancelledKeyException;
import java.nio.channels.ClosedSelectorException;
import java.nio.channels.DatagramChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Phaser;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.RepeatedTest;
class RaceUpdatesAndClose {
private static ExecutorService executor;
@BeforeAll
static void setup() throws Exception {
executor = Executors.newFixedThreadPool(2);
}
@AfterAll
static void finish() {
executor.shutdown();
}
/**
* Race SelectableChannel.register and Selector.close.
*/
@RepeatedTest(100)
void raceRegisterAndClose() throws Exception {
try (Selector sel = Selector.open();
DatagramChannel dc = DatagramChannel.open()) {
dc.configureBlocking(false);
Phaser phaser = new Phaser(2);
// register
var task1 = executor.submit(() -> {
phaser.arriveAndAwaitAdvance();
try {
dc.register(sel, SelectionKey.OP_READ);
} catch (ClosedSelectorException e) { }
return null;
});
// close selector
var task2 = executor.submit(() -> {
phaser.arriveAndAwaitAdvance();
sel.close();
return null;
});
task1.get();
task2.get();
}
}
/**
* Race SelectionKey.interestOps and Selector.close.
*/
@RepeatedTest(100)
void raceInterestOpsAndClose() throws Exception {
try (Selector sel = Selector.open();
DatagramChannel dc = DatagramChannel.open()) {
dc.configureBlocking(false);
SelectionKey key = dc.register(sel, SelectionKey.OP_READ);
Phaser phaser = new Phaser(2);
// interestOps
var task1 = executor.submit(() -> {
phaser.arriveAndAwaitAdvance();
try {
key.interestOps(0);
} catch (CancelledKeyException e) { }
});
// close selector
var task2 = executor.submit(() -> {
phaser.arriveAndAwaitAdvance();
sel.close();
return null;
});
task1.get();
task2.get();
}
}
}