95 lines
3.5 KiB
Java
95 lines
3.5 KiB
Java
/*
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* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8137121 8137230
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* @summary (fc) Infinite loop FileChannel.truncate
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* @library /test/lib
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* @build jdk.test.lib.Utils
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* @run main/othervm/timeout=300 LoopingTruncate
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*/
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import java.nio.ByteBuffer;
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import java.nio.channels.FileChannel;
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import java.nio.channels.ClosedByInterruptException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import static java.nio.file.StandardOpenOption.*;
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import java.util.concurrent.TimeUnit;
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import static jdk.test.lib.Utils.adjustTimeout;
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public class LoopingTruncate {
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// (int)FATEFUL_SIZE == -3 == IOStatus.INTERRUPTED
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static long FATEFUL_SIZE = 0x1FFFFFFFDL;
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// At least 20 seconds
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static long TIMEOUT = adjustTimeout(20_000);
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public static void main(String[] args) throws Throwable {
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Path path = Files.createTempFile("LoopingTruncate.tmp", null);
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try (FileChannel fc = FileChannel.open(path, CREATE, WRITE)) {
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fc.position(FATEFUL_SIZE + 1L);
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System.out.println(" Writing large file...");
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long t0 = System.nanoTime();
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fc.write(ByteBuffer.wrap(new byte[] {0}));
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long t1 = System.nanoTime();
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System.out.printf(" Wrote large file in %d ns (%d ms) %n",
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t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));
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Thread th = new Thread(() -> {
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try {
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System.out.println(" Truncating large file...");
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long t2 = System.nanoTime();
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fc.truncate(FATEFUL_SIZE);
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long t3 = System.nanoTime();
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System.out.printf(" Truncated large file in %d ns (%d ms) %n",
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t3 - t2, TimeUnit.NANOSECONDS.toMillis(t3 - t2));
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} catch (ClosedByInterruptException ignore) {
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} catch (Exception e) {
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throw new RuntimeException(e);
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}});
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th.start();
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th.join(TIMEOUT);
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if (th.isAlive()) {
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System.err.println("=== Stack trace of the guilty thread:");
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for (StackTraceElement el : th.getStackTrace()) {
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System.err.println("\t" + el);
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}
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System.err.println("===");
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th.interrupt();
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th.join();
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throw new RuntimeException("Failed to complete on time");
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}
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} finally {
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Files.deleteIfExists(path);
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}
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System.out.println("Test succeeded.");
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System.out.flush();
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}
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}
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