J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* @test |
| 25 | * @bug 6565543 |
| 26 | * @summary Minimal test for unsafe.copyMemory() and unsafe.setMemory() |
| 27 | */ |
| 28 | |
| 29 | import java.util.*; |
| 30 | import java.lang.reflect.*; |
| 31 | import java.nio.*; |
| 32 | |
| 33 | import sun.misc.Unsafe; |
| 34 | |
| 35 | import sun.nio.ch.DirectBuffer; |
| 36 | |
| 37 | public class CopyMemory { |
| 38 | |
| 39 | private final static int BUFFER_SIZE = 1024; |
| 40 | private final static int N = 16 * 1024; |
| 41 | |
| 42 | private final static int FILLER = 0x55; |
| 43 | private final static int FILLER2 = 0x33; |
| 44 | |
| 45 | private final static Random random = new Random(); |
| 46 | |
| 47 | private static void set(byte[] b, int ofs, int len, int value) { |
| 48 | for (int i = 0; i < len; i++) { |
| 49 | b[ofs + i] = (byte)value; |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | private static void check(byte[] b, int ofs, int len, int value) { |
| 54 | for (int i = 0; i < len; i++) { |
| 55 | int r = b[ofs + i] & 0xff; |
| 56 | if (r != value) { |
| 57 | throw new RuntimeException("mismatch"); |
| 58 | } |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | private static void set(Unsafe unsafe, long addr, int ofs, int len, int value) { |
| 63 | for (int i = 0; i < len; i++) { |
| 64 | unsafe.putByte(null, addr + ofs + i, (byte)value); |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | private static void check(Unsafe unsafe, long addr, int ofs, int len, int value) { |
| 69 | for (int i = 0; i < len; i++) { |
| 70 | int r = unsafe.getByte(null, addr + ofs + i) & 0xff; |
| 71 | if (r != value) { |
| 72 | throw new RuntimeException("mismatch"); |
| 73 | } |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | private static final List<ByteBuffer> buffers = new ArrayList<ByteBuffer>(); |
| 78 | |
| 79 | private static long getMemory(int n) { |
| 80 | ByteBuffer b = ByteBuffer.allocateDirect(n); |
| 81 | if (b instanceof DirectBuffer == false) { |
| 82 | throw new RuntimeException("Not a direct buffer"); |
| 83 | } |
| 84 | buffers.add(b); // make sure the buffer does not get GCed |
| 85 | return ((DirectBuffer)b).address(); |
| 86 | } |
| 87 | |
| 88 | private static void testSetByteArray(Unsafe unsafe) throws Exception { |
| 89 | System.out.println("Testing setMemory() for byte[]..."); |
| 90 | byte[] b = new byte[BUFFER_SIZE]; |
| 91 | for (int i = 0; i < N; i++) { |
| 92 | set(b, 0, BUFFER_SIZE, FILLER); |
| 93 | int ofs = random.nextInt(BUFFER_SIZE / 2); |
| 94 | int len = random.nextInt(BUFFER_SIZE / 2); |
| 95 | int val = random.nextInt(256); |
| 96 | unsafe.setMemory(b, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs, len, (byte)val); |
| 97 | check(b, 0, ofs - 1, FILLER); |
| 98 | check(b, ofs, len, val); |
| 99 | check(b, ofs + len, BUFFER_SIZE - (ofs + len), FILLER); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | private static void testSetRawMemory(Unsafe unsafe) throws Exception { |
| 104 | System.out.println("Testing setMemory() for raw memory..."); |
| 105 | long b = getMemory(BUFFER_SIZE); |
| 106 | for (int i = 0; i < N; i++) { |
| 107 | set(unsafe, b, 0, BUFFER_SIZE, FILLER); |
| 108 | int ofs = random.nextInt(BUFFER_SIZE / 2); |
| 109 | int len = random.nextInt(BUFFER_SIZE / 2); |
| 110 | int val = random.nextInt(256); |
| 111 | unsafe.setMemory(null, b + ofs, len, (byte)val); |
| 112 | check(unsafe, b, 0, ofs - 1, FILLER); |
| 113 | check(unsafe, b, ofs, len, val); |
| 114 | check(unsafe, b, ofs + len, BUFFER_SIZE - (ofs + len), FILLER); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | private static void testCopyByteArrayToByteArray(Unsafe unsafe) throws Exception { |
| 119 | System.out.println("Testing copyMemory() for byte[] to byte[]..."); |
| 120 | byte[] b1 = new byte[BUFFER_SIZE]; |
| 121 | byte[] b2 = new byte[BUFFER_SIZE]; |
| 122 | for (int i = 0; i < N; i++) { |
| 123 | set(b1, 0, BUFFER_SIZE, FILLER); |
| 124 | set(b2, 0, BUFFER_SIZE, FILLER2); |
| 125 | int ofs = random.nextInt(BUFFER_SIZE / 2); |
| 126 | int len = random.nextInt(BUFFER_SIZE / 2); |
| 127 | int val = random.nextInt(256); |
| 128 | set(b1, ofs, len, val); |
| 129 | int ofs2 = random.nextInt(BUFFER_SIZE / 2); |
| 130 | unsafe.copyMemory(b1, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs, |
| 131 | b2, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs2, len); |
| 132 | check(b2, 0, ofs2 - 1, FILLER2); |
| 133 | check(b2, ofs2, len, val); |
| 134 | check(b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | private static void testCopyByteArrayToRawMemory(Unsafe unsafe) throws Exception { |
| 139 | System.out.println("Testing copyMemory() for byte[] to raw memory..."); |
| 140 | byte[] b1 = new byte[BUFFER_SIZE]; |
| 141 | long b2 = getMemory(BUFFER_SIZE); |
| 142 | for (int i = 0; i < N; i++) { |
| 143 | set(b1, 0, BUFFER_SIZE, FILLER); |
| 144 | set(unsafe, b2, 0, BUFFER_SIZE, FILLER2); |
| 145 | int ofs = random.nextInt(BUFFER_SIZE / 2); |
| 146 | int len = random.nextInt(BUFFER_SIZE / 2); |
| 147 | int val = random.nextInt(256); |
| 148 | set(b1, ofs, len, val); |
| 149 | int ofs2 = random.nextInt(BUFFER_SIZE / 2); |
| 150 | unsafe.copyMemory(b1, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs, |
| 151 | null, b2 + ofs2, len); |
| 152 | check(unsafe, b2, 0, ofs2 - 1, FILLER2); |
| 153 | check(unsafe, b2, ofs2, len, val); |
| 154 | check(unsafe, b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | private static void testCopyRawMemoryToByteArray(Unsafe unsafe) throws Exception { |
| 159 | System.out.println("Testing copyMemory() for raw memory to byte[]..."); |
| 160 | long b1 = getMemory(BUFFER_SIZE); |
| 161 | byte[] b2 = new byte[BUFFER_SIZE]; |
| 162 | for (int i = 0; i < N; i++) { |
| 163 | set(unsafe, b1, 0, BUFFER_SIZE, FILLER); |
| 164 | set(b2, 0, BUFFER_SIZE, FILLER2); |
| 165 | int ofs = random.nextInt(BUFFER_SIZE / 2); |
| 166 | int len = random.nextInt(BUFFER_SIZE / 2); |
| 167 | int val = random.nextInt(256); |
| 168 | set(unsafe, b1, ofs, len, val); |
| 169 | int ofs2 = random.nextInt(BUFFER_SIZE / 2); |
| 170 | unsafe.copyMemory(null, b1 + ofs, |
| 171 | b2, Unsafe.ARRAY_BYTE_BASE_OFFSET + ofs2, len); |
| 172 | check(b2, 0, ofs2 - 1, FILLER2); |
| 173 | check(b2, ofs2, len, val); |
| 174 | check(b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | private static void testCopyRawMemoryToRawMemory(Unsafe unsafe) throws Exception { |
| 179 | System.out.println("Testing copyMemory() for raw memory to raw memory..."); |
| 180 | long b1 = getMemory(BUFFER_SIZE); |
| 181 | long b2 = getMemory(BUFFER_SIZE); |
| 182 | for (int i = 0; i < N; i++) { |
| 183 | set(unsafe, b1, 0, BUFFER_SIZE, FILLER); |
| 184 | set(unsafe, b2, 0, BUFFER_SIZE, FILLER2); |
| 185 | int ofs = random.nextInt(BUFFER_SIZE / 2); |
| 186 | int len = random.nextInt(BUFFER_SIZE / 2); |
| 187 | int val = random.nextInt(256); |
| 188 | set(unsafe, b1, ofs, len, val); |
| 189 | int ofs2 = random.nextInt(BUFFER_SIZE / 2); |
| 190 | unsafe.copyMemory(null, b1 + ofs, |
| 191 | null, b2 + ofs2, len); |
| 192 | check(unsafe, b2, 0, ofs2 - 1, FILLER2); |
| 193 | check(unsafe, b2, ofs2, len, val); |
| 194 | check(unsafe, b2, ofs2 + len, BUFFER_SIZE - (ofs2 + len), FILLER2); |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | private static Unsafe getUnsafe() throws Exception { |
| 199 | Field f = Unsafe.class.getDeclaredField("theUnsafe"); |
| 200 | f.setAccessible(true); |
| 201 | return (Unsafe)f.get(null); |
| 202 | } |
| 203 | |
| 204 | public static void main(String[] args) throws Exception { |
| 205 | Unsafe unsafe = getUnsafe(); |
| 206 | |
| 207 | testSetByteArray(unsafe); |
| 208 | testSetRawMemory(unsafe); |
| 209 | testCopyByteArrayToByteArray(unsafe); |
| 210 | testCopyByteArrayToRawMemory(unsafe); |
| 211 | testCopyRawMemoryToByteArray(unsafe); |
| 212 | testCopyRawMemoryToRawMemory(unsafe); |
| 213 | |
| 214 | System.out.println("OK"); |
| 215 | } |
| 216 | |
| 217 | } |