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 boolean 28 * @modules java.base/jdk.internal.misc 29 * @run testng/othervm -Diters=100 -Xint JdkInternalMiscUnsafeAccessTestBoolean 30 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 JdkInternalMiscUnsafeAccessTestBoolean 31 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation JdkInternalMiscUnsafeAccessTestBoolean 32 * @run testng/othervm -Diters=20000 JdkInternalMiscUnsafeAccessTestBoolean 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 JdkInternalMiscUnsafeAccessTestBoolean { 42 static final int ITERS = Integer.getInteger("iters", 1); 43 44 static final jdk.internal.misc.Unsafe UNSAFE; 45 46 static final long V_OFFSET; 47 48 static final Object STATIC_V_BASE; 49 50 static final long STATIC_V_OFFSET; 51 52 static int ARRAY_OFFSET; 53 54 static int ARRAY_SHIFT; 55 56 static { 57 try { 58 Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe"); 59 f.setAccessible(true); 60 UNSAFE = (jdk.internal.misc.Unsafe) f.get(null); 61 } catch (Exception e) { 62 throw new RuntimeException("Unable to get Unsafe instance.", e); 63 } 64 65 try { 66 Field staticVField = JdkInternalMiscUnsafeAccessTestBoolean.class.getDeclaredField("static_v"); 67 STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField); 68 STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField); 69 } catch (Exception e) { 70 throw new RuntimeException(e); 71 } 72 73 try { 74 Field vField = JdkInternalMiscUnsafeAccessTestBoolean.class.getDeclaredField("v"); 75 V_OFFSET = UNSAFE.objectFieldOffset(vField); 76 } catch (Exception e) { 77 throw new RuntimeException(e); 78 } 79 80 ARRAY_OFFSET = UNSAFE.arrayBaseOffset(boolean[].class); 81 int ascale = UNSAFE.arrayIndexScale(boolean[].class); 82 ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); 83 } 84 85 static boolean static_v; 86 87 boolean v; 88 89 @Test 90 public void testFieldInstance() { 91 JdkInternalMiscUnsafeAccessTestBoolean t = new JdkInternalMiscUnsafeAccessTestBoolean(); 92 for (int c = 0; c < ITERS; c++) { 93 testAccess(t, V_OFFSET); 94 } 95 } 96 97 @Test 98 public void testFieldStatic() { 99 for (int c = 0; c < ITERS; c++) { 100 testAccess(STATIC_V_BASE, STATIC_V_OFFSET); 101 } 102 } 103 104 @Test 105 public void testArray() { 106 boolean[] array = new boolean[10]; 107 for (int c = 0; c < ITERS; c++) { 108 for (int i = 0; i < array.length; i++) { 109 testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET); 110 } 111 } 112 } 113 114 115 static void testAccess(Object base, long offset) { 116 // Plain 117 { 118 UNSAFE.putBoolean(base, offset, true); 119 boolean x = UNSAFE.getBoolean(base, offset); 120 assertEquals(x, true, "set boolean value"); 121 } 122 123 // Volatile 124 { 125 UNSAFE.putBooleanVolatile(base, offset, false); 126 boolean x = UNSAFE.getBooleanVolatile(base, offset); 127 assertEquals(x, false, "putVolatile boolean value"); 128 } 129 130 131 // Lazy 132 { 133 UNSAFE.putBooleanRelease(base, offset, true); 134 boolean x = UNSAFE.getBooleanAcquire(base, offset); 135 assertEquals(x, true, "putRelease boolean value"); 136 } 137 138 // Opaque 139 { 140 UNSAFE.putBooleanOpaque(base, offset, false); 141 boolean x = UNSAFE.getBooleanOpaque(base, offset); 142 assertEquals(x, false, "putOpaque boolean value"); 143 } 144 145 146 147 } 148 149 } 150 151