--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/sun/misc/CopyMemory.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,220 @@
+/*
+ * Copyright (c) 2007, 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 6565543
+ * @summary Minimal test for unsafe.copyMemory() and unsafe.setMemory()
+ * @modules java.base/sun.nio.ch
+ * jdk.unsupported
+ * @key randomness
+ */
+
+import java.util.*;
+import java.lang.reflect.*;
+import java.nio.*;
+
+import sun.misc.Unsafe;
+
+import sun.nio.ch.DirectBuffer;
+
+public class CopyMemory {
+
+ private final static int BUFFER_SIZE = 1024;
+ private final static int N = 16 * 1024;
+
+ private final static int FILLER = 0x55;
+ private final static int FILLER2 = 0x33;
+
+ private final static Random random = new Random();
+
+ private static void set(byte[] b, int ofs, int len, int value) {
+ for (int i = 0; i < len; i++) {
+ b[ofs + i] = (byte)value;
+ }
+ }
+
+ private static void check(byte[] b, int ofs, int len, int value) {
+ for (int i = 0; i < len; i++) {
+ int r = b[ofs + i] & 0xff;
+ if (r != value) {
+ throw new RuntimeException("mismatch");
+ }
+ }
+ }
+
+ private static void set(Unsafe unsafe, long addr, int ofs, int len, int value) {
+ for (int i = 0; i < len; i++) {
+ unsafe.putByte(null, addr + ofs + i, (byte)value);
+ }
+ }
+
+ private static void check(Unsafe unsafe, long addr, int ofs, int len, int value) {
+ for (int i = 0; i < len; i++) {
+ int r = unsafe.getByte(null, addr + ofs + i) & 0xff;
+ if (r != value) {
+ throw new RuntimeException("mismatch");
+ }
+ }
+ }
+
+ private static final List<ByteBuffer> buffers = new ArrayList<ByteBuffer>();
+
+ private static long getMemory(int n) {
+ ByteBuffer b = ByteBuffer.allocateDirect(n);
+ if (b instanceof DirectBuffer == false) {
+ throw new RuntimeException("Not a direct buffer");
+ }
+ buffers.add(b); // make sure the buffer does not get GCed
+ return ((DirectBuffer)b).address();
+ }
+
+ private static void testSetByteArray(Unsafe unsafe) throws Exception {
+ System.out.println("Testing setMemory() for byte[]...");
+ byte[] b = new byte[BUFFER_SIZE];
+ for (int i = 0; i < N; i++) {
+ set(b, 0, BUFFER_SIZE, FILLER);
+ int ofs = random.nextInt(BUFFER_SIZE / 2);
+ int len = random.nextInt(BUFFER_SIZE / 2);
+ int val = random.nextInt(256);
+ unsafe.setMemory(b, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs, len, (byte)val);
+ check(b, 0, ofs - 1, FILLER);
+ check(b, ofs, len, val);
+ check(b, ofs + len, BUFFER_SIZE - (ofs + len), FILLER);
+ }
+ }
+
+ private static void testSetRawMemory(Unsafe unsafe) throws Exception {
+ System.out.println("Testing setMemory() for raw memory...");
+ long b = getMemory(BUFFER_SIZE);
+ for (int i = 0; i < N; i++) {
+ set(unsafe, b, 0, BUFFER_SIZE, FILLER);
+ int ofs = random.nextInt(BUFFER_SIZE / 2);
+ int len = random.nextInt(BUFFER_SIZE / 2);
+ int val = random.nextInt(256);
+ unsafe.setMemory(null, b + ofs, len, (byte)val);
+ check(unsafe, b, 0, ofs - 1, FILLER);
+ check(unsafe, b, ofs, len, val);
+ check(unsafe, b, ofs + len, BUFFER_SIZE - (ofs + len), FILLER);
+ }
+ }
+
+ private static void testCopyByteArrayToByteArray(Unsafe unsafe) throws Exception {
+ System.out.println("Testing copyMemory() for byte[] to byte[]...");
+ byte[] b1 = new byte[BUFFER_SIZE];
+ byte[] b2 = new byte[BUFFER_SIZE];
+ for (int i = 0; i < N; i++) {
+ set(b1, 0, BUFFER_SIZE, FILLER);
+ set(b2, 0, BUFFER_SIZE, FILLER2);
+ int ofs = random.nextInt(BUFFER_SIZE / 2);
+ int len = random.nextInt(BUFFER_SIZE / 2);
+ int val = random.nextInt(256);
+ set(b1, ofs, len, val);
+ int ofs2 = random.nextInt(BUFFER_SIZE / 2);
+ unsafe.copyMemory(b1, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs,
+ b2, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs2, len);
+ check(b2, 0, ofs2 - 1, FILLER2);
+ check(b2, ofs2, len, val);
+ check(b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2);
+ }
+ }
+
+ private static void testCopyByteArrayToRawMemory(Unsafe unsafe) throws Exception {
+ System.out.println("Testing copyMemory() for byte[] to raw memory...");
+ byte[] b1 = new byte[BUFFER_SIZE];
+ long b2 = getMemory(BUFFER_SIZE);
+ for (int i = 0; i < N; i++) {
+ set(b1, 0, BUFFER_SIZE, FILLER);
+ set(unsafe, b2, 0, BUFFER_SIZE, FILLER2);
+ int ofs = random.nextInt(BUFFER_SIZE / 2);
+ int len = random.nextInt(BUFFER_SIZE / 2);
+ int val = random.nextInt(256);
+ set(b1, ofs, len, val);
+ int ofs2 = random.nextInt(BUFFER_SIZE / 2);
+ unsafe.copyMemory(b1, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs,
+ null, b2 + ofs2, len);
+ check(unsafe, b2, 0, ofs2 - 1, FILLER2);
+ check(unsafe, b2, ofs2, len, val);
+ check(unsafe, b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2);
+ }
+ }
+
+ private static void testCopyRawMemoryToByteArray(Unsafe unsafe) throws Exception {
+ System.out.println("Testing copyMemory() for raw memory to byte[]...");
+ long b1 = getMemory(BUFFER_SIZE);
+ byte[] b2 = new byte[BUFFER_SIZE];
+ for (int i = 0; i < N; i++) {
+ set(unsafe, b1, 0, BUFFER_SIZE, FILLER);
+ set(b2, 0, BUFFER_SIZE, FILLER2);
+ int ofs = random.nextInt(BUFFER_SIZE / 2);
+ int len = random.nextInt(BUFFER_SIZE / 2);
+ int val = random.nextInt(256);
+ set(unsafe, b1, ofs, len, val);
+ int ofs2 = random.nextInt(BUFFER_SIZE / 2);
+ unsafe.copyMemory(null, b1 + ofs,
+ b2, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs2, len);
+ check(b2, 0, ofs2 - 1, FILLER2);
+ check(b2, ofs2, len, val);
+ check(b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2);
+ }
+ }
+
+ private static void testCopyRawMemoryToRawMemory(Unsafe unsafe) throws Exception {
+ System.out.println("Testing copyMemory() for raw memory to raw memory...");
+ long b1 = getMemory(BUFFER_SIZE);
+ long b2 = getMemory(BUFFER_SIZE);
+ for (int i = 0; i < N; i++) {
+ set(unsafe, b1, 0, BUFFER_SIZE, FILLER);
+ set(unsafe, b2, 0, BUFFER_SIZE, FILLER2);
+ int ofs = random.nextInt(BUFFER_SIZE / 2);
+ int len = random.nextInt(BUFFER_SIZE / 2);
+ int val = random.nextInt(256);
+ set(unsafe, b1, ofs, len, val);
+ int ofs2 = random.nextInt(BUFFER_SIZE / 2);
+ unsafe.copyMemory(null, b1 + ofs,
+ null, b2 + ofs2, len);
+ check(unsafe, b2, 0, ofs2 - 1, FILLER2);
+ check(unsafe, b2, ofs2, len, val);
+ check(unsafe, b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2);
+ }
+ }
+
+ private static Unsafe getUnsafe() throws Exception {
+ Field f = Unsafe.class.getDeclaredField("theUnsafe");
+ f.setAccessible(true);
+ return (Unsafe)f.get(null);
+ }
+
+ public static void main(String[] args) throws Exception {
+ Unsafe unsafe = getUnsafe();
+
+ testSetByteArray(unsafe);
+ testSetRawMemory(unsafe);
+ testCopyByteArrayToByteArray(unsafe);
+ testCopyByteArrayToRawMemory(unsafe);
+ testCopyRawMemoryToByteArray(unsafe);
+ testCopyRawMemoryToRawMemory(unsafe);
+
+ System.out.println("OK");
+ }
+
+}