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