1 /* 2 * Copyright (c) 2016, 2017, 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 8165000 8172547 27 * @summary Verify no IOException on OS X for large timeout value in select() 28 * and that timeout does not occur too early on Windows. 29 * @requires (os.family == "mac" | os.family == "windows") 30 */ 31 import java.io.IOException; 32 import java.nio.channels.Selector; 33 34 public class SelectTimeout { 35 private static final long BIG_TIMEOUT = 100_000_001_000L; // 8165000 36 private static final long BIGGER_TIMEOUT = 850_000_000_000_000L; // 8172547 37 private static final long SLEEP_MILLIS = 10000; 38 39 private static volatile Exception theException; 40 private static volatile boolean isTimedOut; 41 42 public static void main(String[] args) 43 throws IOException, InterruptedException { 44 int failures = 0; 45 long[] timeouts = 46 new long[] {0, BIG_TIMEOUT/2, BIG_TIMEOUT - 1, BIG_TIMEOUT, 47 BIGGER_TIMEOUT}; 48 for (long t : timeouts) { 49 if (!test(t)) { 50 failures++; 51 } 52 } 53 if (failures > 0) { 54 throw new RuntimeException("Test failed!"); 55 } else { 56 System.out.println("Test succeeded"); 57 } 58 } 59 60 private static boolean test(final long timeout) 61 throws InterruptedException, IOException { 62 theException = null; 63 isTimedOut = false; 64 65 Selector selector = Selector.open(); 66 67 Thread t = new Thread(() -> { 68 try { 69 selector.select(timeout); 70 isTimedOut = true; 71 } catch (IOException ioe) { 72 theException = ioe; 73 } 74 }); 75 t.start(); 76 77 Thread.currentThread().join(SLEEP_MILLIS); 78 t.interrupt(); 79 80 if (theException == null) { 81 if (timeout > SLEEP_MILLIS && isTimedOut) { 82 System.err.printf("Test timed out early with timeout %d%n", 83 timeout); 84 return false; 85 } else { 86 System.out.printf("Test succeeded with timeout %d%n", timeout); 87 return true; 88 } 89 } else { 90 System.err.printf("Test failed with timeout %d%n", timeout); 91 theException.printStackTrace(); 92 return false; 93 } 94 } 95 }