--- /dev/null 2018-01-17 03:57:16.098719894 -0500 +++ new/test/java/nio/channels/FileChannel/FileExtensionAndMap.java 2018-02-02 03:17:01.186317316 -0500 @@ -0,0 +1,203 @@ +/* + * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* @test + * @ignore This test has huge disk space requirements + * @bug 8168628 + * @summary Test extending files to very large sizes without hitting a SIGBUS + * @requires (os.family == "linux") + * @run main/othervm/timeout=600 -Xms4g -Xmx4g FileExtensionAndMap + * @run main/othervm/timeout=600 -Xms4g -Xmx4g FileExtensionAndMap true + */ + +import java.io.File; +import java.io.IOException; +import java.io.RandomAccessFile; +import java.nio.MappedByteBuffer; +import java.nio.channels.ClosedChannelException; +import java.nio.channels.FileChannel; +import java.nio.channels.FileChannel.MapMode; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.nio.file.StandardCopyOption; +import java.nio.file.StandardOpenOption; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.ForkJoinPool; +import java.util.concurrent.Semaphore; +import java.util.stream.IntStream; + +public class FileExtensionAndMap { + + private static final ExecutorService CACHED_EXECUTORSERVICE = + Executors.newCachedThreadPool(); + + private static final String TMPDIR = System.getProperty("test.dir", "."); + + private static boolean useRaf = false; + + public static void main(String args[]) throws Exception { + if (args.length > 2) { + throw new IllegalArgumentException + ("Arguments: [true|false [targetFolder]]"); + } + + String defaultFolder = TMPDIR + File.separator + "target"; + if (args.length > 0) { + useRaf = Boolean.valueOf(args[0]); + if (args.length > 1) { + defaultFolder = args[1]; + } + } + final String targetFolder = defaultFolder; + Path p = Paths.get(targetFolder); + boolean targetExists = Files.exists(p); + if (!targetExists) { + Files.createDirectory(p); + } + + System.out.printf("Using RandomAccessFile: %s; target folder: %s%n", + useRaf, targetFolder); + + ForkJoinPool fjPool = new ForkJoinPool(3); + fjPool.submit(() -> { + IntStream.range(0, 20).parallel().forEach((index) -> { + String fileName = "testBigFile_" + index + ".dat"; + Path source = null; + Path target = null; + try { + source = Paths.get(TMPDIR, fileName); + testCreateBigFile(source); + target = Paths.get(targetFolder, fileName); + testFileCopy(source, target); + } catch (Throwable th) { + System.err.println("Error copying file with fileName: " + + fileName + " : " + th.getMessage()); + th.printStackTrace(System.err); + } finally { + try { + if (source != null) { + Files.deleteIfExists(source); + } + } catch (Throwable ignored) { + } + try { + if (target != null) { + Files.deleteIfExists(target); + } + } catch (Throwable ignored) { + } + } + }); + }).join(); + + if (!targetExists) { + Files.delete(p); + } + } + + private static void testFileCopy(Path source, Path target) + throws IOException { + Files.copy(source, target, StandardCopyOption.REPLACE_EXISTING); + System.out.println("Finished copying file with fileName: " + + source.getFileName()); + } + + private static void testCreateBigFile(Path segmentFile) + throws IOException { + final Semaphore concurrencySemaphore = new Semaphore(5); + long fileSize = 3L * 1024L * 1024L * 1024L; + int blockSize = 10 * 1024 * 1024; + int loopCount = (int) Math.floorDiv(fileSize, blockSize); + + String fileName = segmentFile.getFileName().toString(); + if (useRaf) { + try (RandomAccessFile raf + = new RandomAccessFile(segmentFile.toFile(), "rw")) { + raf.setLength(fileSize); + try (FileChannel fc = raf.getChannel()) { + for (int i = 0; i < loopCount; i++) { + final long startPosition = 1L * blockSize * i; + concurrencySemaphore.acquireUninterruptibly(); + CACHED_EXECUTORSERVICE.submit(() -> { + writeTemplateData(fileName, fc, startPosition, + blockSize, concurrencySemaphore); + }); + } + } finally { + concurrencySemaphore.acquireUninterruptibly(5); + } + } + } else { + Path file = Files.createFile(segmentFile); + try (FileChannel fc = FileChannel.open(file, + StandardOpenOption.READ, StandardOpenOption.WRITE)) { + for (int i = 0; i < loopCount; i++) { + final long startPosition = 1L * blockSize * i; + concurrencySemaphore.acquireUninterruptibly(); + CACHED_EXECUTORSERVICE.submit(() -> { + writeTemplateData(fileName, fc, startPosition, + blockSize, concurrencySemaphore); + }); + } + } + } + } + + private static void writeTemplateData(String fileName, + FileChannel fc, long startPosition, int blockSize, + Semaphore concurrencySemaphore) { + try { + byte[] EMPTY_RECORD = new byte[blockSize / 256]; + + MappedByteBuffer mappedByteBuffer = fc.map(MapMode.READ_WRITE, + startPosition, blockSize); + IntStream.range(0, 256).forEach((recordIndex) -> { + try { + mappedByteBuffer.position((int) (recordIndex * + EMPTY_RECORD.length)); + mappedByteBuffer.put(EMPTY_RECORD, 0, EMPTY_RECORD.length); + } catch (Throwable th) { + System.err.println + ("Error in FileExtensionAndMap.writeTemplateData empty record for fileName: " + + fileName + ", startPosition: " + startPosition + ", recordIndex: " + + recordIndex + " : " + th.getMessage()); + th.printStackTrace(System.err); + } + }); + + mappedByteBuffer.force(); + } catch (Throwable th) { + if (!(th instanceof ClosedChannelException)) { + System.err.println + ("Error in FileExtensionAndMap.writeTemplateData empty record for fileName: " + + fileName + ", startPosition: " + startPosition + " : " + + th.getMessage()); + th.printStackTrace(System.err); + } + } finally { + concurrencySemaphore.release(); + } + } +}