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 short 28 * 29 * @modules java.base/jdk.internal.misc 30 * @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort 31 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort 32 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort 33 * @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort 34 */ 35 36 package compiler.unsafe; 37 38 import org.testng.annotations.Test; 39 40 import java.lang.reflect.Field; 41 42 import static org.testng.Assert.*; 43 44 public class JdkInternalMiscUnsafeAccessTestShort { 45 static final int ITERS = Integer.getInteger("iters", 1); 46 static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10); 47 48 static final jdk.internal.misc.Unsafe UNSAFE; 49 50 static final long V_OFFSET; 51 52 static final Object STATIC_V_BASE; 53 54 static final long STATIC_V_OFFSET; 55 56 static int ARRAY_OFFSET; 57 58 static int ARRAY_SHIFT; 59 60 static { 61 try { 62 Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe"); 63 f.setAccessible(true); 64 UNSAFE = (jdk.internal.misc.Unsafe) f.get(null); 65 } catch (Exception e) { 66 throw new RuntimeException("Unable to get Unsafe instance.", e); 67 } 68 69 try { 70 Field staticVField = JdkInternalMiscUnsafeAccessTestShort.class.getDeclaredField("static_v"); 71 STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField); 72 STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField); 73 } catch (Exception e) { 74 throw new RuntimeException(e); 75 } 76 77 try { 78 Field vField = JdkInternalMiscUnsafeAccessTestShort.class.getDeclaredField("v"); 79 V_OFFSET = UNSAFE.objectFieldOffset(vField); 80 } catch (Exception e) { 81 throw new RuntimeException(e); 82 } 83 84 ARRAY_OFFSET = UNSAFE.arrayBaseOffset(short[].class); 85 int ascale = UNSAFE.arrayIndexScale(short[].class); 86 ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); 87 } 88 89 static short static_v; 90 91 short v; 92 93 @Test 94 public void testFieldInstance() { 95 JdkInternalMiscUnsafeAccessTestShort t = new JdkInternalMiscUnsafeAccessTestShort(); 96 for (int c = 0; c < ITERS; c++) { 97 testAccess(t, V_OFFSET); 98 } 99 } 100 101 @Test 102 public void testFieldStatic() { 103 for (int c = 0; c < ITERS; c++) { 104 testAccess(STATIC_V_BASE, STATIC_V_OFFSET); 105 } 106 } 107 108 @Test 109 public void testArray() { 110 short[] array = new short[10]; 111 for (int c = 0; c < ITERS; c++) { 112 for (int i = 0; i < array.length; i++) { 113 testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET); 114 } 115 } 116 } 117 118 @Test 119 public void testArrayOffHeap() { 120 int size = 10; 121 long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); 122 try { 123 for (int c = 0; c < ITERS; c++) { 124 for (int i = 0; i < size; i++) { 125 testAccess(null, (((long) i) << ARRAY_SHIFT) + address); 126 } 127 } 128 } finally { 129 UNSAFE.freeMemory(address); 130 } 131 } 132 133 @Test 134 public void testArrayOffHeapDirect() { 135 int size = 10; 136 long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); 137 try { 138 for (int c = 0; c < ITERS; c++) { 139 for (int i = 0; i < size; i++) { 140 testAccess((((long) i) << ARRAY_SHIFT) + address); 141 } 142 } 143 } finally { 144 UNSAFE.freeMemory(address); 145 } 146 } 147 148 static void testAccess(Object base, long offset) { 149 // Plain 150 { 151 UNSAFE.putShort(base, offset, (short)0x0123); 152 short x = UNSAFE.getShort(base, offset); 153 assertEquals(x, (short)0x0123, "set short value"); 154 } 155 156 // Volatile 157 { 158 UNSAFE.putShortVolatile(base, offset, (short)0x4567); 159 short x = UNSAFE.getShortVolatile(base, offset); 160 assertEquals(x, (short)0x4567, "putVolatile short value"); 161 } 162 163 164 // Lazy 165 { 166 UNSAFE.putShortRelease(base, offset, (short)0x0123); 167 short x = UNSAFE.getShortAcquire(base, offset); 168 assertEquals(x, (short)0x0123, "putRelease short value"); 169 } 170 171 // Opaque 172 { 173 UNSAFE.putShortOpaque(base, offset, (short)0x4567); 174 short x = UNSAFE.getShortOpaque(base, offset); 175 assertEquals(x, (short)0x4567, "putOpaque short value"); 176 } 177 178 // Unaligned 179 { 180 UNSAFE.putShortUnaligned(base, offset, (short)0x4567); 181 short x = UNSAFE.getShortUnaligned(base, offset); 182 assertEquals(x, (short)0x4567, "putUnaligned short value"); 183 } 184 185 { 186 UNSAFE.putShortUnaligned(base, offset, (short)0x0123, true); 187 short x = UNSAFE.getShortUnaligned(base, offset, true); 188 assertEquals(x, (short)0x0123, "putUnaligned big endian short value"); 189 } 190 191 { 192 UNSAFE.putShortUnaligned(base, offset, (short)0x4567, false); 193 short x = UNSAFE.getShortUnaligned(base, offset, false); 194 assertEquals(x, (short)0x4567, "putUnaligned little endian short value"); 195 } 196 197 UNSAFE.putShort(base, offset, (short)0x0123); 198 199 // Compare 200 { 201 boolean r = UNSAFE.compareAndSwapShort(base, offset, (short)0x0123, (short)0x4567); 202 assertEquals(r, true, "success compareAndSwap short"); 203 short x = UNSAFE.getShort(base, offset); 204 assertEquals(x, (short)0x4567, "success compareAndSwap short value"); 205 } 206 207 { 208 boolean r = UNSAFE.compareAndSwapShort(base, offset, (short)0x0123, (short)0x89AB); 209 assertEquals(r, false, "failing compareAndSwap short"); 210 short x = UNSAFE.getShort(base, offset); 211 assertEquals(x, (short)0x4567, "failing compareAndSwap short value"); 212 } 213 214 // Advanced compare 215 { 216 short r = UNSAFE.compareAndExchangeShortVolatile(base, offset, (short)0x4567, (short)0x0123); 217 assertEquals(r, (short)0x4567, "success compareAndExchangeVolatile short"); 218 short x = UNSAFE.getShort(base, offset); 219 assertEquals(x, (short)0x0123, "success compareAndExchangeVolatile short value"); 220 } 221 222 { 223 short r = UNSAFE.compareAndExchangeShortVolatile(base, offset, (short)0x4567, (short)0x89AB); 224 assertEquals(r, (short)0x0123, "failing compareAndExchangeVolatile short"); 225 short x = UNSAFE.getShort(base, offset); 226 assertEquals(x, (short)0x0123, "failing compareAndExchangeVolatile short value"); 227 } 228 229 { 230 short r = UNSAFE.compareAndExchangeShortAcquire(base, offset, (short)0x0123, (short)0x4567); 231 assertEquals(r, (short)0x0123, "success compareAndExchangeAcquire short"); 232 short x = UNSAFE.getShort(base, offset); 233 assertEquals(x, (short)0x4567, "success compareAndExchangeAcquire short value"); 234 } 235 236 { 237 short r = UNSAFE.compareAndExchangeShortAcquire(base, offset, (short)0x0123, (short)0x89AB); 238 assertEquals(r, (short)0x4567, "failing compareAndExchangeAcquire short"); 239 short x = UNSAFE.getShort(base, offset); 240 assertEquals(x, (short)0x4567, "failing compareAndExchangeAcquire short value"); 241 } 242 243 { 244 short r = UNSAFE.compareAndExchangeShortRelease(base, offset, (short)0x4567, (short)0x0123); 245 assertEquals(r, (short)0x4567, "success compareAndExchangeRelease short"); 246 short x = UNSAFE.getShort(base, offset); 247 assertEquals(x, (short)0x0123, "success compareAndExchangeRelease short value"); 248 } 249 250 { 251 short r = UNSAFE.compareAndExchangeShortRelease(base, offset, (short)0x4567, (short)0x89AB); 252 assertEquals(r, (short)0x0123, "failing compareAndExchangeRelease short"); 253 short x = UNSAFE.getShort(base, offset); 254 assertEquals(x, (short)0x0123, "failing compareAndExchangeRelease short value"); 255 } 256 257 { 258 boolean success = false; 259 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 260 success = UNSAFE.weakCompareAndSwapShort(base, offset, (short)0x0123, (short)0x4567); 261 } 262 assertEquals(success, true, "weakCompareAndSwap short"); 263 short x = UNSAFE.getShort(base, offset); 264 assertEquals(x, (short)0x4567, "weakCompareAndSwap short value"); 265 } 266 267 { 268 boolean success = false; 269 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 270 success = UNSAFE.weakCompareAndSwapShortAcquire(base, offset, (short)0x4567, (short)0x0123); 271 } 272 assertEquals(success, true, "weakCompareAndSwapAcquire short"); 273 short x = UNSAFE.getShort(base, offset); 274 assertEquals(x, (short)0x0123, "weakCompareAndSwapAcquire short"); 275 } 276 277 { 278 boolean success = false; 279 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 280 success = UNSAFE.weakCompareAndSwapShortRelease(base, offset, (short)0x0123, (short)0x4567); 281 } 282 assertEquals(success, true, "weakCompareAndSwapRelease short"); 283 short x = UNSAFE.getShort(base, offset); 284 assertEquals(x, (short)0x4567, "weakCompareAndSwapRelease short"); 285 } 286 287 { 288 boolean success = false; 289 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 290 success = UNSAFE.weakCompareAndSwapShortVolatile(base, offset, (short)0x4567, (short)0x0123); 291 } 292 assertEquals(success, true, "weakCompareAndSwapVolatile short"); 293 short x = UNSAFE.getShort(base, offset); 294 assertEquals(x, (short)0x0123, "weakCompareAndSwapVolatile short"); 295 } 296 297 UNSAFE.putShort(base, offset, (short)0x4567); 298 299 // Compare set and get 300 { 301 short o = UNSAFE.getAndSetShort(base, offset, (short)0x0123); 302 assertEquals(o, (short)0x4567, "getAndSet short"); 303 short x = UNSAFE.getShort(base, offset); 304 assertEquals(x, (short)0x0123, "getAndSet short value"); 305 } 306 307 UNSAFE.putShort(base, offset, (short)0x0123); 308 309 // get and add, add and get 310 { 311 short o = UNSAFE.getAndAddShort(base, offset, (short)0x4567); 312 assertEquals(o, (short)0x0123, "getAndAdd short"); 313 short x = UNSAFE.getShort(base, offset); 314 assertEquals(x, (short)((short)0x0123 + (short)0x4567), "getAndAdd short"); 315 } 316 } 317 318 static void testAccess(long address) { 319 // Plain 320 { 321 UNSAFE.putShort(address, (short)0x0123); 322 short x = UNSAFE.getShort(address); 323 assertEquals(x, (short)0x0123, "set short value"); 324 } 325 } 326 } 327