--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/nio/channels/FileChannel/directio/PreadDirect.java Tue Oct 17 16:51:11 2017 -0700
@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) 2017, 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
+ * @bug 8164900
+ * @summary Test positional read method of FileChannel with DirectIO
+ * (use -Dseed=X to set PRNG seed)
+ * @library .. /test/lib
+ * @build jdk.test.lib.RandomFactory
+ * DirectIOTest
+ * @run main/othervm PreadDirect
+ * @key randomness
+ */
+
+import java.io.*;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.channels.*;
+import java.nio.file.Files;
+import java.nio.file.FileStore;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import java.util.Random;
+import com.sun.nio.file.ExtendedOpenOption;
+
+import jdk.test.lib.RandomFactory;
+
+/**
+ * Testing FileChannel's positional read method.
+ */
+
+public class PreadDirect {
+
+ private static PrintStream err = System.err;
+
+ private static Random generator = RandomFactory.getRandom();
+
+ private static int charsPerGroup = -1;
+
+ private static int alignment = -1;
+
+ public static void main(String[] args) throws Exception {
+ if (initTests()) {
+ genericTest();
+ testNotAlignedChannelPosition();
+ testNegativeChannelPosition();
+ }
+ }
+
+ private static boolean initTests() throws Exception {
+ Path p = DirectIOTest.createTempFile();
+ if (!DirectIOTest.isDirectIOSupportedByFS(p)) {
+ Files.delete(p);
+ return false;
+ }
+ try {
+ FileStore fs = Files.getFileStore(p);
+ alignment = (int)fs.getBlockSize();
+ charsPerGroup = alignment;
+ } finally {
+ Files.delete(p);
+ }
+ return true;
+ }
+
+ private static void testNegativeChannelPosition() throws Exception {
+ Path p = DirectIOTest.createTempFile();
+
+ try (OutputStream fos = Files.newOutputStream(p)) {
+ fos.write(new byte[charsPerGroup]);
+ }
+
+ try (FileChannel fc = FileChannel.open(p,
+ StandardOpenOption.DELETE_ON_CLOSE, ExtendedOpenOption.DIRECT)) {
+ try {
+ fc.read(ByteBuffer.allocate(charsPerGroup), -1L);
+ throw new RuntimeException("Expected exception not thrown");
+ } catch(IllegalArgumentException e) {
+ // Correct result
+ }
+ }
+ }
+
+ private static void testNotAlignedChannelPosition() throws Exception {
+ Path p = DirectIOTest.createTempFile();
+
+ try (OutputStream fos = Files.newOutputStream(p)) {
+ fos.write(new byte[charsPerGroup]);
+ }
+
+ try (FileChannel fc = FileChannel.open(p,
+ StandardOpenOption.DELETE_ON_CLOSE, ExtendedOpenOption.DIRECT)) {
+ long pos = charsPerGroup - 1;
+ try {
+ fc.read(ByteBuffer.allocate(charsPerGroup), pos);
+ throw new RuntimeException("Expected exception not thrown");
+ } catch(IOException e) {
+ if (!e.getMessage().contains("Channel position (" + pos
+ + ") is not a multiple of the block size (" + alignment + ")"))
+ throw new RuntimeException("Read test failed");
+ }
+ }
+ }
+
+ private static void genericTest() throws Exception {
+ StringBuffer sb = new StringBuffer();
+ sb.setLength(2);
+
+ Path p = DirectIOTest.createTempFile();
+
+ initTestFile(p);
+
+ try (FileChannel fc = FileChannel.open(p,
+ StandardOpenOption.DELETE_ON_CLOSE, ExtendedOpenOption.DIRECT)) {
+ ByteBuffer block =
+ ByteBuffer.allocateDirect(charsPerGroup + alignment - 1)
+ .alignedSlice(alignment);
+ for (int x = 0; x < 100; x++) {
+ block.clear();
+ long offset = generator.nextInt(100) * charsPerGroup;
+ long expectedResult = offset / charsPerGroup;
+ offset = expectedResult * charsPerGroup;
+
+ long originalPosition = fc.position();
+
+ int read = fc.read(block, offset);
+ if (read != charsPerGroup)
+ throw new Exception("Read failed");
+
+ long newPosition = fc.position();
+
+ for (int i = 0; i < 2; i++) {
+ byte aByte = block.get(i);
+ sb.setCharAt(i, (char)aByte);
+ }
+ int result = Integer.parseInt(sb.toString());
+ if (result != expectedResult) {
+ err.println("I expected "+ expectedResult);
+ err.println("I got "+ result);
+ throw new Exception("Read test failed");
+ }
+
+ // Ensure that file pointer position has not changed
+ if (originalPosition != newPosition)
+ throw new Exception("File position modified");
+ }
+ }
+ }
+
+ private static void initTestFile(Path p) throws Exception {
+ try (OutputStream fos = Files.newOutputStream(p)) {
+ try (BufferedWriter awriter
+ = new BufferedWriter(new OutputStreamWriter(fos, "8859_1"))) {
+
+ for (int i = 0; i < 100; i++) {
+ String number = new Integer(i).toString();
+ for (int h = 0; h < 2 - number.length(); h++)
+ awriter.write("0");
+ awriter.write(""+i);
+ for (int j = 0; j < (charsPerGroup - 2); j++)
+ awriter.write("0");
+ }
+ awriter.flush();
+ }
+ }
+ }
+}