--- /dev/null 2018-06-20 11:01:03.657616567 -0700 +++ new/test/jdk/jdk/net/Sockets/rsocket/Socket/SoTimeout.java 2018-06-22 12:24:15.783671419 -0700 @@ -0,0 +1,100 @@ +/* + * Copyright (c) 1998, 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. + */ + +/* @test + * @bug 8195160 + * @summary Socket.setSoTimeout(T) can cause incorrect delay of T + * under green threads + * @requires (os.family == "linux") + * @library .. /test/lib + * @build RsocketTest + * @run main/othervm -Djava.net.preferIPv4Stack=true SoTimeout + */ + +/* + * This program depends a bit on the particular behaviour of the green + * threads scheduler to produce the problem, but given that the underlying + * bug a green threads bug, I think that's OK. + */ + +import java.net.*; +import jdk.net.Sockets; + +public class SoTimeout implements Runnable { + static ServerSocket serverSocket; + static long timeWritten; + static InetAddress addr; + static int port; + + public static void main(String[] args) throws Exception { + if (!RsocketTest.isRsocketAvailable()) + return; + + addr = InetAddress.getLocalHost(); + + serverSocket = Sockets.openRdmaServerSocket(); + addr = InetAddress.getLocalHost(); + serverSocket.bind(new InetSocketAddress(addr, 0)); + + port = serverSocket.getLocalPort(); + + byte[] b = new byte[12]; + Thread t = new Thread(new SoTimeout()); + t.start(); + + Socket s = serverSocket.accept(); + serverSocket.close(); + + // set a 5 second timeout on the socket + s.setSoTimeout(5000); + + s.getInputStream().read(b, 0, b.length); + s.close(); + + long waited = System.currentTimeMillis() - timeWritten; + + // this sequence should complete fairly quickly and if it + // takes something resembling the the SoTimeout value then + // we are probably incorrectly blocking and not waking up + if (waited > 2000) { + throw new Exception("shouldn't take " + waited + " to complete"); + } + } + + public void run() { + try { + byte[] b = new byte[12]; + Socket s = Sockets.openRdmaSocket(); + s.connect(new InetSocketAddress(addr, port)); + + Thread.yield(); + timeWritten = System.currentTimeMillis(); + s.getOutputStream().write(b, 0, 12); + s.close(); + } catch (Exception e) { + e.printStackTrace(); + throw new RuntimeException("Test Failed"); + } + } + +}