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8237858: PlainSocketImpl.socketAccept() handles EINTR incorrectly
PlainSocketImpl.socketAccept() handles EINTR incorrectly Reviewed-by: alanb, dfuchs, martin
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Vyom Tewari
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Jul 17, 2020
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/* | ||
* Copyright (c) 2020, 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. | ||
*/ | ||
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public class NativeThread { | ||
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public static final int SIGPIPE; | ||
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static { | ||
SIGPIPE = getSIGPIPE(); | ||
} | ||
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public static native long getID(); | ||
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public static native int signal(long threadId, int sig); | ||
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private static native int getSIGPIPE(); | ||
} |
153 changes: 153 additions & 0 deletions
153
test/jdk/java/net/Socket/SocketAcceptInterruptTest.java
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/* | ||
* Copyright (c) 2020, 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. | ||
*/ | ||
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/** | ||
* @test | ||
* @bug 8237858 | ||
* @summary PlainSocketImpl.socketAccept() handles EINTR incorrectly | ||
* @requires (os.family != "windows") | ||
* @compile NativeThread.java | ||
* @run main/othervm/native -Djdk.net.usePlainSocketImpl=true SocketAcceptInterruptTest 0 | ||
* @run main/othervm/native -Djdk.net.usePlainSocketImpl=true SocketAcceptInterruptTest 5000 | ||
* @run main/othervm/native SocketAcceptInterruptTest 0 | ||
* @run main/othervm/native SocketAcceptInterruptTest 5000 | ||
*/ | ||
import java.io.IOException; | ||
import java.io.InputStream; | ||
import java.io.OutputStream; | ||
import java.net.InetAddress; | ||
import java.net.ServerSocket; | ||
import java.net.*; | ||
import java.util.concurrent.Callable; | ||
import java.util.concurrent.ExecutorService; | ||
import java.util.concurrent.Executors; | ||
import java.util.concurrent.Future; | ||
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public class SocketAcceptInterruptTest { | ||
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public static void main(String[] args) throws Exception { | ||
System.loadLibrary("NativeThread"); | ||
InetAddress loopback = InetAddress.getLoopbackAddress(); | ||
ExecutorService executor = Executors.newFixedThreadPool(1); | ||
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try ( ServerSocket ss = new ServerSocket(0, 50, loopback);) { | ||
Server server = new Server(ss, Integer.parseInt(args[0])); | ||
Future<Result> future = executor.submit(server); | ||
long threadId = server.getID(); | ||
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sendSignal(threadId, ss); | ||
sleep(100); | ||
// In failing case server socket will be closed, so we do need to check first | ||
if (!ss.isClosed()) { | ||
// After sending SIGPIPE, create client socket and connect to server | ||
try ( Socket s = new Socket(loopback, ss.getLocalPort()); InputStream in = s.getInputStream();) { | ||
in.read(); // reading one byte is enought for test. | ||
} | ||
} | ||
Result result = future.get(); | ||
if (result.status == Result.FAIL) { | ||
throw result.exception; | ||
} | ||
} finally { | ||
executor.shutdown(); | ||
} | ||
System.out.println("OK!"); | ||
} | ||
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private static void sendSignal(long threadId, ServerSocket ss) { | ||
System.out.println("Sending SIGPIPE to ServerSocket thread."); | ||
int count = 0; | ||
while (!ss.isClosed() && count++ < 20) { | ||
sleep(10); | ||
if (NativeThread.signal(threadId, NativeThread.SIGPIPE) != 0) { | ||
throw new RuntimeException("Failed to interrupt the server thread."); | ||
} | ||
} | ||
} | ||
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private static void sleep(long time) { | ||
try { | ||
Thread.sleep(time); | ||
} catch (InterruptedException e) { | ||
// ignore the exception. | ||
} | ||
} | ||
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static class Server implements Callable<Result> { | ||
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private volatile long threadId; | ||
private final ServerSocket serverSocket; | ||
private final int timeout; | ||
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public Server(ServerSocket ss, int timeout) { | ||
serverSocket = ss; | ||
this.timeout = timeout; | ||
} | ||
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@Override | ||
public Result call() { | ||
try { | ||
threadId = NativeThread.getID(); | ||
serverSocket.setSoTimeout(timeout); | ||
try ( Socket socket = serverSocket.accept(); | ||
OutputStream outputStream = socket.getOutputStream();) { | ||
outputStream.write("Hello!".getBytes()); | ||
return new Result(Result.SUCCESS, null); | ||
} | ||
} catch (IOException e) { | ||
close(); | ||
return new Result(Result.FAIL, e); | ||
} | ||
} | ||
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long getID() { | ||
while (threadId == 0) { | ||
sleep(5); | ||
} | ||
return threadId; | ||
} | ||
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private void close() { | ||
if (!serverSocket.isClosed()) { | ||
try { | ||
serverSocket.close(); | ||
} catch (IOException ex) { | ||
// ignore the exception | ||
} | ||
} | ||
} | ||
} | ||
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static class Result { | ||
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static final int SUCCESS = 0; | ||
static final int FAIL = 1; | ||
final int status; | ||
final Exception exception; | ||
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public Result(int status, Exception ex) { | ||
this.status = status; | ||
exception = ex; | ||
} | ||
} | ||
} |
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