1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8143628 27 * @summary Test unsafe access for int 28 * @modules java.base/jdk.internal.misc 29 * @run testng/othervm -Diters=100 -Xint JdkInternalMiscUnsafeAccessTestInt 30 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 JdkInternalMiscUnsafeAccessTestInt 31 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation JdkInternalMiscUnsafeAccessTestInt 32 * @run testng/othervm -Diters=20000 JdkInternalMiscUnsafeAccessTestInt 33 */ 34 35 import org.testng.annotations.Test; 36 37 import java.lang.reflect.Field; 38 39 import static org.testng.Assert.*; 40 41 public class JdkInternalMiscUnsafeAccessTestInt { 42 static final int ITERS = Integer.getInteger("iters", 1); 43 static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10); 44 45 static final jdk.internal.misc.Unsafe UNSAFE; 46 47 static final long V_OFFSET; 48 49 static final Object STATIC_V_BASE; 50 51 static final long STATIC_V_OFFSET; 52 53 static int ARRAY_OFFSET; 54 55 static int ARRAY_SHIFT; 56 57 static { 58 try { 59 Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe"); 60 f.setAccessible(true); 61 UNSAFE = (jdk.internal.misc.Unsafe) f.get(null); 62 } catch (Exception e) { 63 throw new RuntimeException("Unable to get Unsafe instance.", e); 64 } 65 66 try { 67 Field staticVField = JdkInternalMiscUnsafeAccessTestInt.class.getDeclaredField("static_v"); 68 STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField); 69 STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField); 70 } catch (Exception e) { 71 throw new RuntimeException(e); 72 } 73 74 try { 75 Field vField = JdkInternalMiscUnsafeAccessTestInt.class.getDeclaredField("v"); 76 V_OFFSET = UNSAFE.objectFieldOffset(vField); 77 } catch (Exception e) { 78 throw new RuntimeException(e); 79 } 80 81 ARRAY_OFFSET = UNSAFE.arrayBaseOffset(int[].class); 82 int ascale = UNSAFE.arrayIndexScale(int[].class); 83 ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); 84 } 85 86 static int static_v; 87 88 int v; 89 90 @Test 91 public void testFieldInstance() { 92 JdkInternalMiscUnsafeAccessTestInt t = new JdkInternalMiscUnsafeAccessTestInt(); 93 for (int c = 0; c < ITERS; c++) { 94 testAccess(t, V_OFFSET); 95 } 96 } 97 98 @Test 99 public void testFieldStatic() { 100 for (int c = 0; c < ITERS; c++) { 101 testAccess(STATIC_V_BASE, STATIC_V_OFFSET); 102 } 103 } 104 105 @Test 106 public void testArray() { 107 int[] array = new int[10]; 108 for (int c = 0; c < ITERS; c++) { 109 for (int i = 0; i < array.length; i++) { 110 testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET); 111 } 112 } 113 } 114 115 @Test 116 public void testArrayOffHeap() { 117 int size = 10; 118 long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); 119 try { 120 for (int c = 0; c < ITERS; c++) { 121 for (int i = 0; i < size; i++) { 122 testAccess(null, (((long) i) << ARRAY_SHIFT) + address); 123 } 124 } 125 } finally { 126 UNSAFE.freeMemory(address); 127 } 128 } 129 130 @Test 131 public void testArrayOffHeapDirect() { 132 int size = 10; 133 long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); 134 try { 135 for (int c = 0; c < ITERS; c++) { 136 for (int i = 0; i < size; i++) { 137 testAccess((((long) i) << ARRAY_SHIFT) + address); 138 } 139 } 140 } finally { 141 UNSAFE.freeMemory(address); 142 } 143 } 144 145 static void testAccess(Object base, long offset) { 146 // Plain 147 { 148 UNSAFE.putInt(base, offset, 0x01234567); 149 int x = UNSAFE.getInt(base, offset); 150 assertEquals(x, 0x01234567, "set int value"); 151 } 152 153 // Volatile 154 { 155 UNSAFE.putIntVolatile(base, offset, 0x89ABCDEF); 156 int x = UNSAFE.getIntVolatile(base, offset); 157 assertEquals(x, 0x89ABCDEF, "putVolatile int value"); 158 } 159 160 161 // Lazy 162 { 163 UNSAFE.putIntRelease(base, offset, 0x01234567); 164 int x = UNSAFE.getIntAcquire(base, offset); 165 assertEquals(x, 0x01234567, "putRelease int value"); 166 } 167 168 // Opaque 169 { 170 UNSAFE.putIntOpaque(base, offset, 0x89ABCDEF); 171 int x = UNSAFE.getIntOpaque(base, offset); 172 assertEquals(x, 0x89ABCDEF, "putOpaque int value"); 173 } 174 175 // Unaligned 176 { 177 UNSAFE.putIntUnaligned(base, offset, 0x89ABCDEF); 178 int x = UNSAFE.getIntUnaligned(base, offset); 179 assertEquals(x, 0x89ABCDEF, "putUnaligned int value"); 180 } 181 182 { 183 UNSAFE.putIntUnaligned(base, offset, 0x01234567, true); 184 int x = UNSAFE.getIntUnaligned(base, offset, true); 185 assertEquals(x, 0x01234567, "putUnaligned big endian int value"); 186 } 187 188 { 189 UNSAFE.putIntUnaligned(base, offset, 0x89ABCDEF, false); 190 int x = UNSAFE.getIntUnaligned(base, offset, false); 191 assertEquals(x, 0x89ABCDEF, "putUnaligned little endian int value"); 192 } 193 194 UNSAFE.putInt(base, offset, 0x01234567); 195 196 // Compare 197 { 198 boolean r = UNSAFE.compareAndSwapInt(base, offset, 0x01234567, 0x89ABCDEF); 199 assertEquals(r, true, "success compareAndSwap int"); 200 int x = UNSAFE.getInt(base, offset); 201 assertEquals(x, 0x89ABCDEF, "success compareAndSwap int value"); 202 } 203 204 { 205 boolean r = UNSAFE.compareAndSwapInt(base, offset, 0x01234567, 0xCAFEBABE); 206 assertEquals(r, false, "failing compareAndSwap int"); 207 int x = UNSAFE.getInt(base, offset); 208 assertEquals(x, 0x89ABCDEF, "failing compareAndSwap int value"); 209 } 210 211 // Advanced compare 212 { 213 int r = UNSAFE.compareAndExchangeIntVolatile(base, offset, 0x89ABCDEF, 0x01234567); 214 assertEquals(r, 0x89ABCDEF, "success compareAndExchangeVolatile int"); 215 int x = UNSAFE.getInt(base, offset); 216 assertEquals(x, 0x01234567, "success compareAndExchangeVolatile int value"); 217 } 218 219 { 220 int r = UNSAFE.compareAndExchangeIntVolatile(base, offset, 0x89ABCDEF, 0xCAFEBABE); 221 assertEquals(r, 0x01234567, "failing compareAndExchangeVolatile int"); 222 int x = UNSAFE.getInt(base, offset); 223 assertEquals(x, 0x01234567, "failing compareAndExchangeVolatile int value"); 224 } 225 226 { 227 int r = UNSAFE.compareAndExchangeIntAcquire(base, offset, 0x01234567, 0x89ABCDEF); 228 assertEquals(r, 0x01234567, "success compareAndExchangeAcquire int"); 229 int x = UNSAFE.getInt(base, offset); 230 assertEquals(x, 0x89ABCDEF, "success compareAndExchangeAcquire int value"); 231 } 232 233 { 234 int r = UNSAFE.compareAndExchangeIntAcquire(base, offset, 0x01234567, 0xCAFEBABE); 235 assertEquals(r, 0x89ABCDEF, "failing compareAndExchangeAcquire int"); 236 int x = UNSAFE.getInt(base, offset); 237 assertEquals(x, 0x89ABCDEF, "failing compareAndExchangeAcquire int value"); 238 } 239 240 { 241 int r = UNSAFE.compareAndExchangeIntRelease(base, offset, 0x89ABCDEF, 0x01234567); 242 assertEquals(r, 0x89ABCDEF, "success compareAndExchangeRelease int"); 243 int x = UNSAFE.getInt(base, offset); 244 assertEquals(x, 0x01234567, "success compareAndExchangeRelease int value"); 245 } 246 247 { 248 int r = UNSAFE.compareAndExchangeIntRelease(base, offset, 0x89ABCDEF, 0xCAFEBABE); 249 assertEquals(r, 0x01234567, "failing compareAndExchangeRelease int"); 250 int x = UNSAFE.getInt(base, offset); 251 assertEquals(x, 0x01234567, "failing compareAndExchangeRelease int value"); 252 } 253 254 { 255 boolean success = false; 256 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 257 success = UNSAFE.weakCompareAndSwapInt(base, offset, 0x01234567, 0x89ABCDEF); 258 } 259 assertEquals(success, true, "weakCompareAndSwap int"); 260 int x = UNSAFE.getInt(base, offset); 261 assertEquals(x, 0x89ABCDEF, "weakCompareAndSwap int value"); 262 } 263 264 { 265 boolean success = false; 266 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 267 success = UNSAFE.weakCompareAndSwapIntAcquire(base, offset, 0x89ABCDEF, 0x01234567); 268 } 269 assertEquals(success, true, "weakCompareAndSwapAcquire int"); 270 int x = UNSAFE.getInt(base, offset); 271 assertEquals(x, 0x01234567, "weakCompareAndSwapAcquire int"); 272 } 273 274 { 275 boolean success = false; 276 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 277 success = UNSAFE.weakCompareAndSwapIntRelease(base, offset, 0x01234567, 0x89ABCDEF); 278 } 279 assertEquals(success, true, "weakCompareAndSwapRelease int"); 280 int x = UNSAFE.getInt(base, offset); 281 assertEquals(x, 0x89ABCDEF, "weakCompareAndSwapRelease int"); 282 } 283 284 { 285 boolean success = false; 286 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 287 success = UNSAFE.weakCompareAndSwapIntVolatile(base, offset, 0x89ABCDEF, 0x01234567); 288 } 289 assertEquals(success, true, "weakCompareAndSwapVolatile int"); 290 int x = UNSAFE.getInt(base, offset); 291 assertEquals(x, 0x01234567, "weakCompareAndSwapVolatile int"); 292 } 293 294 UNSAFE.putInt(base, offset, 0x89ABCDEF); 295 296 // Compare set and get 297 { 298 int o = UNSAFE.getAndSetInt(base, offset, 0x01234567); 299 assertEquals(o, 0x89ABCDEF, "getAndSet int"); 300 int x = UNSAFE.getInt(base, offset); 301 assertEquals(x, 0x01234567, "getAndSet int value"); 302 } 303 304 UNSAFE.putInt(base, offset, 0x01234567); 305 306 // get and add, add and get 307 { 308 int o = UNSAFE.getAndAddInt(base, offset, 0x89ABCDEF); 309 assertEquals(o, 0x01234567, "getAndAdd int"); 310 int x = UNSAFE.getInt(base, offset); 311 assertEquals(x, (int)(0x01234567 + 0x89ABCDEF), "getAndAdd int"); 312 } 313 } 314 315 static void testAccess(long address) { 316 // Plain 317 { 318 UNSAFE.putInt(address, 0x01234567); 319 int x = UNSAFE.getInt(address); 320 assertEquals(x, 0x01234567, "set int value"); 321 } 322 } 323 } 324