1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8035897
  27  * @summary FD_SETSIZE should be set on macosx
  28  * @run main/othervm AnotherSelectFdsLimit 1023
  29  * @run main/othervm AnotherSelectFdsLimit 1024
  30  * @run main/othervm AnotherSelectFdsLimit 1025
  31  * @run main/othervm AnotherSelectFdsLimit 1600
  32  */
  33 
  34 import java.io.IOException;
  35 import java.net.ServerSocket;
  36 import java.net.SocketTimeoutException;
  37 import java.util.ArrayList;
  38 import java.util.List;
  39 
  40 public class AnotherSelectFdsLimit {
  41     static final int DEFAULT_FDS_TO_USE = 1600;
  42 
  43     public static void main(String [] args) throws Exception {
  44         if (!System.getProperty("os.name").contains("OS X")) {
  45             System.out.println("Test only run on MAC. Exiting.");
  46             return;
  47         }
  48 
  49         int fdsToUse = DEFAULT_FDS_TO_USE;
  50         if (args.length == 1)
  51             fdsToUse = Integer.parseInt(args[0]);
  52 
  53         System.out.println("Using " + fdsToUse + " fds.");
  54 
  55         List<Thread> threads = new ArrayList<>();
  56         for (int i=0; i<fdsToUse; i++)
  57             threads.add(new WorkerThread());
  58 
  59         for (Thread t : threads)
  60             t.start();
  61 
  62         for (Thread t : threads)
  63             t.join();
  64     }
  65 
  66     static class WorkerThread extends Thread {
  67         public void run() {
  68             try (ServerSocket ss = new ServerSocket(0)) {
  69                 ss.setSoTimeout(2000);
  70                 ss.accept();
  71             } catch (SocketTimeoutException x) {
  72                 // expected
  73             } catch (IOException x) {
  74                 throw new java.io.UncheckedIOException(x);
  75             }
  76         }
  77     }
  78 }