1/* 2 * Copyright (c) 2015, 2017, 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 float 28 * 29 * @modules java.base/jdk.internal.misc:+open 30 * @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat 31 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat 32 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat 33 * @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat 34 */ 35 36package compiler.unsafe; 37 38import org.testng.annotations.Test; 39 40import java.lang.reflect.Field; 41 42import static org.testng.Assert.*; 43 44public class JdkInternalMiscUnsafeAccessTestFloat { 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 = JdkInternalMiscUnsafeAccessTestFloat.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 = JdkInternalMiscUnsafeAccessTestFloat.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(float[].class); 85 int ascale = UNSAFE.arrayIndexScale(float[].class); 86 ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); 87 } 88 89 static float static_v; 90 91 float v; 92 93 @Test 94 public void testFieldInstance() { 95 JdkInternalMiscUnsafeAccessTestFloat t = new JdkInternalMiscUnsafeAccessTestFloat(); 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 float[] array = new float[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.putFloat(base, offset, 1.0f); 152 float x = UNSAFE.getFloat(base, offset); 153 assertEquals(x, 1.0f, "set float value"); 154 } 155 156 // Volatile 157 { 158 UNSAFE.putFloatVolatile(base, offset, 2.0f); 159 float x = UNSAFE.getFloatVolatile(base, offset); 160 assertEquals(x, 2.0f, "putVolatile float value"); 161 } 162 163 164 // Lazy 165 { 166 UNSAFE.putFloatRelease(base, offset, 1.0f); 167 float x = UNSAFE.getFloatAcquire(base, offset); 168 assertEquals(x, 1.0f, "putRelease float value"); 169 } 170 171 // Opaque 172 { 173 UNSAFE.putFloatOpaque(base, offset, 2.0f); 174 float x = UNSAFE.getFloatOpaque(base, offset); 175 assertEquals(x, 2.0f, "putOpaque float value"); 176 } 177 178 179 UNSAFE.putFloat(base, offset, 1.0f); 180 181 // Compare 182 { 183 boolean r = UNSAFE.compareAndSetFloat(base, offset, 1.0f, 2.0f); 184 assertEquals(r, true, "success compareAndSet float"); 185 float x = UNSAFE.getFloat(base, offset); 186 assertEquals(x, 2.0f, "success compareAndSet float value"); 187 } 188 189 { 190 boolean r = UNSAFE.compareAndSetFloat(base, offset, 1.0f, 3.0f); 191 assertEquals(r, false, "failing compareAndSet float"); 192 float x = UNSAFE.getFloat(base, offset); 193 assertEquals(x, 2.0f, "failing compareAndSet float value"); 194 } 195 196 // Advanced compare 197 { 198 float r = UNSAFE.compareAndExchangeFloat(base, offset, 2.0f, 1.0f); 199 assertEquals(r, 2.0f, "success compareAndExchange float"); 200 float x = UNSAFE.getFloat(base, offset); 201 assertEquals(x, 1.0f, "success compareAndExchange float value"); 202 } 203 204 { 205 float r = UNSAFE.compareAndExchangeFloat(base, offset, 2.0f, 3.0f); 206 assertEquals(r, 1.0f, "failing compareAndExchange float"); 207 float x = UNSAFE.getFloat(base, offset); 208 assertEquals(x, 1.0f, "failing compareAndExchange float value"); 209 } 210 211 { 212 float r = UNSAFE.compareAndExchangeFloatAcquire(base, offset, 1.0f, 2.0f); 213 assertEquals(r, 1.0f, "success compareAndExchangeAcquire float"); 214 float x = UNSAFE.getFloat(base, offset); 215 assertEquals(x, 2.0f, "success compareAndExchangeAcquire float value"); 216 } 217 218 { 219 float r = UNSAFE.compareAndExchangeFloatAcquire(base, offset, 1.0f, 3.0f); 220 assertEquals(r, 2.0f, "failing compareAndExchangeAcquire float"); 221 float x = UNSAFE.getFloat(base, offset); 222 assertEquals(x, 2.0f, "failing compareAndExchangeAcquire float value"); 223 } 224 225 { 226 float r = UNSAFE.compareAndExchangeFloatRelease(base, offset, 2.0f, 1.0f); 227 assertEquals(r, 2.0f, "success compareAndExchangeRelease float"); 228 float x = UNSAFE.getFloat(base, offset); 229 assertEquals(x, 1.0f, "success compareAndExchangeRelease float value"); 230 } 231 232 { 233 float r = UNSAFE.compareAndExchangeFloatRelease(base, offset, 2.0f, 3.0f); 234 assertEquals(r, 1.0f, "failing compareAndExchangeRelease float"); 235 float x = UNSAFE.getFloat(base, offset); 236 assertEquals(x, 1.0f, "failing compareAndExchangeRelease float value"); 237 } 238 239 { 240 boolean success = false; 241 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 242 success = UNSAFE.weakCompareAndSetFloatPlain(base, offset, 1.0f, 2.0f); 243 } 244 assertEquals(success, true, "weakCompareAndSetPlain float"); 245 float x = UNSAFE.getFloat(base, offset); 246 assertEquals(x, 2.0f, "weakCompareAndSetPlain float value"); 247 } 248 249 { 250 boolean success = false; 251 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 252 success = UNSAFE.weakCompareAndSetFloatAcquire(base, offset, 2.0f, 1.0f); 253 } 254 assertEquals(success, true, "weakCompareAndSetAcquire float"); 255 float x = UNSAFE.getFloat(base, offset); 256 assertEquals(x, 1.0f, "weakCompareAndSetAcquire float"); 257 } 258 259 { 260 boolean success = false; 261 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 262 success = UNSAFE.weakCompareAndSetFloatRelease(base, offset, 1.0f, 2.0f); 263 } 264 assertEquals(success, true, "weakCompareAndSetRelease float"); 265 float x = UNSAFE.getFloat(base, offset); 266 assertEquals(x, 2.0f, "weakCompareAndSetRelease float"); 267 } 268 269 { 270 boolean success = false; 271 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { 272 success = UNSAFE.weakCompareAndSetFloat(base, offset, 2.0f, 1.0f); 273 } 274 assertEquals(success, true, "weakCompareAndSet float"); 275 float x = UNSAFE.getFloat(base, offset); 276 assertEquals(x, 1.0f, "weakCompareAndSet float"); 277 } 278 279 UNSAFE.putFloat(base, offset, 2.0f); 280 281 // Compare set and get 282 { 283 float o = UNSAFE.getAndSetFloat(base, offset, 1.0f); 284 assertEquals(o, 2.0f, "getAndSet float"); 285 float x = UNSAFE.getFloat(base, offset); 286 assertEquals(x, 1.0f, "getAndSet float value"); 287 } 288 289 UNSAFE.putFloat(base, offset, 1.0f); 290 291 // get and add, add and get 292 { 293 float o = UNSAFE.getAndAddFloat(base, offset, 2.0f); 294 assertEquals(o, 1.0f, "getAndAdd float"); 295 float x = UNSAFE.getFloat(base, offset); 296 assertEquals(x, (float)(1.0f + 2.0f), "getAndAdd float"); 297 } 298 } 299 300 static void testAccess(long address) { 301 // Plain 302 { 303 UNSAFE.putFloat(address, 1.0f); 304 float x = UNSAFE.getFloat(address); 305 assertEquals(x, 1.0f, "set float value"); 306 } 307 } 308} 309