diff options
author | alanb <none@none> | 2012-08-21 13:42:08 +0100 |
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committer | alanb <none@none> | 2012-08-21 13:42:08 +0100 |
commit | 460b307938c6a4fda4d4efa91418aea60621c84b (patch) | |
tree | 2df0ba2dfb80e33ceae2f2be9fa4c0c008111a7b /test/java/nio/channels | |
parent | e183168d431bc4ff2a1762de794e3f4cf769620a (diff) |
7132889: (se) AbstractSelectableChannel.register and configureBlocking not safe from asynchronous close
Reviewed-by: alanb
Contributed-by: Shirish Kuncolienkar <shirishk@linux.vnet.ibm.com>
Diffstat (limited to 'test/java/nio/channels')
-rw-r--r-- | test/java/nio/channels/SelectionKey/RacyRegister.java | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/test/java/nio/channels/SelectionKey/RacyRegister.java b/test/java/nio/channels/SelectionKey/RacyRegister.java new file mode 100644 index 000000000..d3df1024a --- /dev/null +++ b/test/java/nio/channels/SelectionKey/RacyRegister.java @@ -0,0 +1,71 @@ +/* + * Copyright (c) 2012, 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 7132889 + * @summary Test that register does not return a valid SelectionKey when + * invoked at around the time that the channel is closed + */ + +import java.nio.channels.*; +import java.util.concurrent.*; +import java.util.Random; +import java.io.IOException; + +public class RacyRegister { + + public static void main(String[] args) throws Exception { + ExecutorService pool = Executors.newFixedThreadPool(1); + try (Selector sel = Selector.open()) { + int count = 100; + while (count-- > 0) { + final SocketChannel sc = SocketChannel.open(); + sc.configureBlocking(false); + + // close channel asynchronously + Future<Void> result = pool.submit(new Callable<Void>() { + public Void call() throws IOException { + sc.close(); + return null; + } + }); + + // attempt to register channel with Selector + SelectionKey key = null; + try { + key = sc.register(sel, SelectionKey.OP_READ); + } catch (ClosedChannelException ignore) { + } + + // ensure close is done + result.get(); + + // if we have a key then it should be invalid + if (key != null && key.isValid()) + throw new RuntimeException("Key is valid"); + } + } finally { + pool.shutdown(); + } + } +} |