author | ohair |
Tue, 25 May 2010 15:58:33 -0700 | |
changeset 5506 | 202f599c92aa |
parent 2057 | 3acf8e5e2ca0 |
child 7187 | 1ad8f3107d3b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2009, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* @test |
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* @bug 4607272 |
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* @summary Unit test for AsynchronousSocketChannel |
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* @run main/othervm -XX:+DisableExplicitGC -mx64m Leaky |
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*/ |
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import java.nio.ByteBuffer; |
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import java.nio.channels.*; |
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import java.net.*; |
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import java.util.concurrent.Future; |
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/** |
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* Heap buffers must be substituted with direct buffers when doing I/O. This |
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* test creates a scenario on Windows that challenges the per-thread buffer |
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* cache and quickly leads to an OutOfMemoryError if temporary buffers are |
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* not returned to the native heap. |
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*/ |
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public class Leaky { |
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static final int K = 1024; |
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static class Connection { |
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private final AsynchronousSocketChannel client; |
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private final SocketChannel peer; |
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private final ByteBuffer dst; |
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private Future<Integer> readResult; |
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Connection() throws Exception { |
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ServerSocketChannel ssc = |
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ServerSocketChannel.open().bind(new InetSocketAddress(0)); |
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InetAddress lh = InetAddress.getLocalHost(); |
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int port = ((InetSocketAddress)(ssc.getLocalAddress())).getPort(); |
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SocketAddress remote = new InetSocketAddress(lh, port); |
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client = AsynchronousSocketChannel.open(); |
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client.connect(remote).get(); |
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peer = ssc.accept(); |
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ssc.close(); |
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dst = ByteBuffer.allocate(K*K); |
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} |
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void startRead() { |
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dst.clear(); |
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readResult = client.read(dst); |
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} |
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void write() throws Exception { |
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peer.write(ByteBuffer.wrap("X".getBytes())); |
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} |
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void finishRead() throws Exception { |
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readResult.get(); |
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} |
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} |
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public static void main(String[] args) throws Exception { |
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final int CONNECTION_COUNT = 10; |
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Connection[] connections = new Connection[CONNECTION_COUNT]; |
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for (int i=0; i<CONNECTION_COUNT; i++) { |
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connections[i] = new Connection(); |
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} |
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for (int i=0; i<1024; i++) { |
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// initiate reads |
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for (Connection conn: connections) { |
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conn.startRead(); |
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} |
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// write data so that the read can complete |
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for (Connection conn: connections) { |
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conn.write(); |
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} |
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// complete read |
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for (Connection conn: connections) { |
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conn.finishRead(); |
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} |
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} |
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} |
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} |