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