1 /* 2 * Copyright (c) 2015, 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 8137121 8137230 27 * @key intermittent 28 * @summary (fc) Infinite loop FileChannel.truncate 29 * @library /lib/testlibrary 30 * @build jdk.testlibrary.Utils 31 * @run main/othervm LoopingTruncate 32 */ 33 34 import java.nio.ByteBuffer; 35 import java.nio.channels.FileChannel; 36 import java.nio.channels.ClosedByInterruptException; 37 import java.nio.file.Files; 38 import java.nio.file.Path; 39 import static java.nio.file.StandardOpenOption.*; 40 import static jdk.testlibrary.Utils.adjustTimeout; 41 42 public class LoopingTruncate { 43 44 // (int)FATEFUL_SIZE == -3 == IOStatus.INTERRUPTED 45 static long FATEFUL_SIZE = 0x1FFFFFFFDL; 46 47 // At least 20 seconds 48 static long TIMEOUT = adjustTimeout(20_000); 49 50 public static void main(String[] args) throws Throwable { 51 Path path = Files.createTempFile("LoopingTruncate.tmp", null); 52 try (FileChannel fc = FileChannel.open(path, CREATE, WRITE)) { 53 fc.position(FATEFUL_SIZE + 1L); 54 fc.write(ByteBuffer.wrap(new byte[] {0})); 55 56 Thread th = new Thread(() -> { 57 try { 58 fc.truncate(FATEFUL_SIZE); 59 } catch (ClosedByInterruptException ignore) { 60 } catch (Exception e) { 61 throw new RuntimeException(e); 62 }}); 63 th.start(); 64 th.join(TIMEOUT); 65 66 if (th.isAlive()) { 67 System.err.println("=== Stack trace of the guilty thread:"); 68 for (StackTraceElement el : th.getStackTrace()) { 69 System.err.println("\t" + el); 70 } 71 System.err.println("==="); 72 73 th.interrupt(); 74 th.join(); 75 throw new RuntimeException("Failed to complete on time"); 76 } 77 } finally { 78 Files.deleteIfExists(path); 79 } 80 81 System.out.println("Test succeeded."); 82 System.out.flush(); 83 } 84 }