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 }