undefect. CWE-407 — 63 sites patched across 27 ecosystems
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
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test/jdk/sun/misc/CopyMemory.java
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test/jdk/sun/misc/CopyMemory.java
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/*
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* Copyright (c) 2007, 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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/* @test
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* @bug 6565543
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* @summary Minimal test for unsafe.copyMemory() and unsafe.setMemory()
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* @modules java.base/sun.nio.ch
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* jdk.unsupported
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* @key randomness
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*/
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import java.util.*;
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import java.lang.reflect.*;
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import java.nio.*;
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import sun.misc.Unsafe;
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import sun.nio.ch.DirectBuffer;
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public class CopyMemory {
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private final static int BUFFER_SIZE = 1024;
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private final static int N = 16 * 1024;
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private final static int FILLER = 0x55;
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private final static int FILLER2 = 0x33;
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private final static Random random = new Random();
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private static void set(byte[] b, int ofs, int len, int value) {
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for (int i = 0; i < len; i++) {
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b[ofs + i] = (byte)value;
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}
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}
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private static void check(byte[] b, int ofs, int len, int value) {
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for (int i = 0; i < len; i++) {
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int r = b[ofs + i] & 0xff;
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if (r != value) {
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throw new RuntimeException("mismatch");
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}
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}
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}
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private static void set(Unsafe unsafe, long addr, int ofs, int len, int value) {
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for (int i = 0; i < len; i++) {
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unsafe.putByte(null, addr + ofs + i, (byte)value);
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}
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}
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private static void check(Unsafe unsafe, long addr, int ofs, int len, int value) {
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for (int i = 0; i < len; i++) {
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int r = unsafe.getByte(null, addr + ofs + i) & 0xff;
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if (r != value) {
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throw new RuntimeException("mismatch");
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}
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}
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}
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private static final List<ByteBuffer> buffers = new ArrayList<ByteBuffer>();
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private static long getMemory(int n) {
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ByteBuffer b = ByteBuffer.allocateDirect(n);
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if (b instanceof DirectBuffer == false) {
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throw new RuntimeException("Not a direct buffer");
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}
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buffers.add(b); // make sure the buffer does not get GCed
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return ((DirectBuffer)b).address();
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}
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private static void testSetByteArray(Unsafe unsafe) throws Exception {
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System.out.println("Testing setMemory() for byte[]...");
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byte[] b = new byte[BUFFER_SIZE];
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for (int i = 0; i < N; i++) {
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set(b, 0, BUFFER_SIZE, FILLER);
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int ofs = random.nextInt(BUFFER_SIZE / 2);
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int len = random.nextInt(BUFFER_SIZE / 2);
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int val = random.nextInt(256);
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unsafe.setMemory(b, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs, len, (byte)val);
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check(b, 0, ofs - 1, FILLER);
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check(b, ofs, len, val);
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check(b, ofs + len, BUFFER_SIZE - (ofs + len), FILLER);
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}
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}
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private static void testSetRawMemory(Unsafe unsafe) throws Exception {
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System.out.println("Testing setMemory() for raw memory...");
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long b = getMemory(BUFFER_SIZE);
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for (int i = 0; i < N; i++) {
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set(unsafe, b, 0, BUFFER_SIZE, FILLER);
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int ofs = random.nextInt(BUFFER_SIZE / 2);
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int len = random.nextInt(BUFFER_SIZE / 2);
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int val = random.nextInt(256);
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unsafe.setMemory(null, b + ofs, len, (byte)val);
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check(unsafe, b, 0, ofs - 1, FILLER);
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check(unsafe, b, ofs, len, val);
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check(unsafe, b, ofs + len, BUFFER_SIZE - (ofs + len), FILLER);
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}
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}
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private static void testCopyByteArrayToByteArray(Unsafe unsafe) throws Exception {
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System.out.println("Testing copyMemory() for byte[] to byte[]...");
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byte[] b1 = new byte[BUFFER_SIZE];
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byte[] b2 = new byte[BUFFER_SIZE];
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for (int i = 0; i < N; i++) {
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set(b1, 0, BUFFER_SIZE, FILLER);
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set(b2, 0, BUFFER_SIZE, FILLER2);
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int ofs = random.nextInt(BUFFER_SIZE / 2);
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int len = random.nextInt(BUFFER_SIZE / 2);
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int val = random.nextInt(256);
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set(b1, ofs, len, val);
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int ofs2 = random.nextInt(BUFFER_SIZE / 2);
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unsafe.copyMemory(b1, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs,
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b2, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs2, len);
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check(b2, 0, ofs2 - 1, FILLER2);
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check(b2, ofs2, len, val);
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check(b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2);
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}
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}
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private static void testCopyByteArrayToRawMemory(Unsafe unsafe) throws Exception {
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System.out.println("Testing copyMemory() for byte[] to raw memory...");
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byte[] b1 = new byte[BUFFER_SIZE];
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long b2 = getMemory(BUFFER_SIZE);
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for (int i = 0; i < N; i++) {
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set(b1, 0, BUFFER_SIZE, FILLER);
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set(unsafe, b2, 0, BUFFER_SIZE, FILLER2);
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int ofs = random.nextInt(BUFFER_SIZE / 2);
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int len = random.nextInt(BUFFER_SIZE / 2);
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int val = random.nextInt(256);
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set(b1, ofs, len, val);
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int ofs2 = random.nextInt(BUFFER_SIZE / 2);
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unsafe.copyMemory(b1, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs,
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null, b2 + ofs2, len);
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check(unsafe, b2, 0, ofs2 - 1, FILLER2);
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check(unsafe, b2, ofs2, len, val);
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check(unsafe, b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2);
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}
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}
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private static void testCopyRawMemoryToByteArray(Unsafe unsafe) throws Exception {
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System.out.println("Testing copyMemory() for raw memory to byte[]...");
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long b1 = getMemory(BUFFER_SIZE);
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byte[] b2 = new byte[BUFFER_SIZE];
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for (int i = 0; i < N; i++) {
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set(unsafe, b1, 0, BUFFER_SIZE, FILLER);
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set(b2, 0, BUFFER_SIZE, FILLER2);
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int ofs = random.nextInt(BUFFER_SIZE / 2);
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int len = random.nextInt(BUFFER_SIZE / 2);
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int val = random.nextInt(256);
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set(unsafe, b1, ofs, len, val);
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int ofs2 = random.nextInt(BUFFER_SIZE / 2);
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unsafe.copyMemory(null, b1 + ofs,
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b2, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs2, len);
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check(b2, 0, ofs2 - 1, FILLER2);
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check(b2, ofs2, len, val);
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check(b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2);
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}
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}
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private static void testCopyRawMemoryToRawMemory(Unsafe unsafe) throws Exception {
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System.out.println("Testing copyMemory() for raw memory to raw memory...");
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long b1 = getMemory(BUFFER_SIZE);
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long b2 = getMemory(BUFFER_SIZE);
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for (int i = 0; i < N; i++) {
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set(unsafe, b1, 0, BUFFER_SIZE, FILLER);
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set(unsafe, b2, 0, BUFFER_SIZE, FILLER2);
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int ofs = random.nextInt(BUFFER_SIZE / 2);
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int len = random.nextInt(BUFFER_SIZE / 2);
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int val = random.nextInt(256);
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set(unsafe, b1, ofs, len, val);
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int ofs2 = random.nextInt(BUFFER_SIZE / 2);
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unsafe.copyMemory(null, b1 + ofs,
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null, b2 + ofs2, len);
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check(unsafe, b2, 0, ofs2 - 1, FILLER2);
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check(unsafe, b2, ofs2, len, val);
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check(unsafe, b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2);
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}
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}
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private static Unsafe getUnsafe() throws Exception {
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Field f = Unsafe.class.getDeclaredField("theUnsafe");
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f.setAccessible(true);
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return (Unsafe)f.get(null);
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}
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public static void main(String[] args) throws Exception {
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Unsafe unsafe = getUnsafe();
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testSetByteArray(unsafe);
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testSetRawMemory(unsafe);
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testCopyByteArrayToByteArray(unsafe);
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testCopyByteArrayToRawMemory(unsafe);
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testCopyRawMemoryToByteArray(unsafe);
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testCopyRawMemoryToRawMemory(unsafe);
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System.out.println("OK");
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}
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}
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