JdkInternalMiscUnsafeAccessTestBoolean.java revision 12290:8953c0318163 
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 *
29 * @modules java.base/jdk.internal.misc:+open
30 * @run testng/othervm -Diters=100   -Xint                   compiler.unsafe.JdkInternalMiscUnsafeAccessTestBoolean
31 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestBoolean
32 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  compiler.unsafe.JdkInternalMiscUnsafeAccessTestBoolean
33 * @run testng/othervm -Diters=20000                         compiler.unsafe.JdkInternalMiscUnsafeAccessTestBoolean
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 JdkInternalMiscUnsafeAccessTestBoolean {
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 = JdkInternalMiscUnsafeAccessTestBoolean.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 = JdkInternalMiscUnsafeAccessTestBoolean.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(boolean[].class);
85        int ascale = UNSAFE.arrayIndexScale(boolean[].class);
86        ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
87    }
88
89    static boolean static_v;
90
91    boolean v;
92
93    @Test
94    public void testFieldInstance() {
95        JdkInternalMiscUnsafeAccessTestBoolean t = new JdkInternalMiscUnsafeAccessTestBoolean();
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        boolean[] array = new boolean[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
119    static void testAccess(Object base, long offset) {
120        // Plain
121        {
122            UNSAFE.putBoolean(base, offset, true);
123            boolean x = UNSAFE.getBoolean(base, offset);
124            assertEquals(x, true, "set boolean value");
125        }
126
127        // Volatile
128        {
129            UNSAFE.putBooleanVolatile(base, offset, false);
130            boolean x = UNSAFE.getBooleanVolatile(base, offset);
131            assertEquals(x, false, "putVolatile boolean value");
132        }
133
134
135        // Lazy
136        {
137            UNSAFE.putBooleanRelease(base, offset, true);
138            boolean x = UNSAFE.getBooleanAcquire(base, offset);
139            assertEquals(x, true, "putRelease boolean value");
140        }
141
142        // Opaque
143        {
144            UNSAFE.putBooleanOpaque(base, offset, false);
145            boolean x = UNSAFE.getBooleanOpaque(base, offset);
146            assertEquals(x, false, "putOpaque boolean value");
147        }
148
149
150        UNSAFE.putBoolean(base, offset, true);
151
152        // Compare
153        {
154            boolean r = UNSAFE.compareAndSwapBoolean(base, offset, true, false);
155            assertEquals(r, true, "success compareAndSwap boolean");
156            boolean x = UNSAFE.getBoolean(base, offset);
157            assertEquals(x, false, "success compareAndSwap boolean value");
158        }
159
160        {
161            boolean r = UNSAFE.compareAndSwapBoolean(base, offset, true, false);
162            assertEquals(r, false, "failing compareAndSwap boolean");
163            boolean x = UNSAFE.getBoolean(base, offset);
164            assertEquals(x, false, "failing compareAndSwap boolean value");
165        }
166
167        // Advanced compare
168        {
169            boolean r = UNSAFE.compareAndExchangeBooleanVolatile(base, offset, false, true);
170            assertEquals(r, false, "success compareAndExchangeVolatile boolean");
171            boolean x = UNSAFE.getBoolean(base, offset);
172            assertEquals(x, true, "success compareAndExchangeVolatile boolean value");
173        }
174
175        {
176            boolean r = UNSAFE.compareAndExchangeBooleanVolatile(base, offset, false, false);
177            assertEquals(r, true, "failing compareAndExchangeVolatile boolean");
178            boolean x = UNSAFE.getBoolean(base, offset);
179            assertEquals(x, true, "failing compareAndExchangeVolatile boolean value");
180        }
181
182        {
183            boolean r = UNSAFE.compareAndExchangeBooleanAcquire(base, offset, true, false);
184            assertEquals(r, true, "success compareAndExchangeAcquire boolean");
185            boolean x = UNSAFE.getBoolean(base, offset);
186            assertEquals(x, false, "success compareAndExchangeAcquire boolean value");
187        }
188
189        {
190            boolean r = UNSAFE.compareAndExchangeBooleanAcquire(base, offset, true, false);
191            assertEquals(r, false, "failing compareAndExchangeAcquire boolean");
192            boolean x = UNSAFE.getBoolean(base, offset);
193            assertEquals(x, false, "failing compareAndExchangeAcquire boolean value");
194        }
195
196        {
197            boolean r = UNSAFE.compareAndExchangeBooleanRelease(base, offset, false, true);
198            assertEquals(r, false, "success compareAndExchangeRelease boolean");
199            boolean x = UNSAFE.getBoolean(base, offset);
200            assertEquals(x, true, "success compareAndExchangeRelease boolean value");
201        }
202
203        {
204            boolean r = UNSAFE.compareAndExchangeBooleanRelease(base, offset, false, false);
205            assertEquals(r, true, "failing compareAndExchangeRelease boolean");
206            boolean x = UNSAFE.getBoolean(base, offset);
207            assertEquals(x, true, "failing compareAndExchangeRelease boolean value");
208        }
209
210        {
211            boolean success = false;
212            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
213                success = UNSAFE.weakCompareAndSwapBoolean(base, offset, true, false);
214            }
215            assertEquals(success, true, "weakCompareAndSwap boolean");
216            boolean x = UNSAFE.getBoolean(base, offset);
217            assertEquals(x, false, "weakCompareAndSwap boolean value");
218        }
219
220        {
221            boolean success = false;
222            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
223                success = UNSAFE.weakCompareAndSwapBooleanAcquire(base, offset, false, true);
224            }
225            assertEquals(success, true, "weakCompareAndSwapAcquire boolean");
226            boolean x = UNSAFE.getBoolean(base, offset);
227            assertEquals(x, true, "weakCompareAndSwapAcquire boolean");
228        }
229
230        {
231            boolean success = false;
232            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
233                success = UNSAFE.weakCompareAndSwapBooleanRelease(base, offset, true, false);
234            }
235            assertEquals(success, true, "weakCompareAndSwapRelease boolean");
236            boolean x = UNSAFE.getBoolean(base, offset);
237            assertEquals(x, false, "weakCompareAndSwapRelease boolean");
238        }
239
240        {
241            boolean success = false;
242            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
243                success = UNSAFE.weakCompareAndSwapBooleanVolatile(base, offset, false, true);
244            }
245            assertEquals(success, true, "weakCompareAndSwapVolatile boolean");
246            boolean x = UNSAFE.getBoolean(base, offset);
247            assertEquals(x, true, "weakCompareAndSwapVolatile boolean");
248        }
249
250        UNSAFE.putBoolean(base, offset, false);
251
252        // Compare set and get
253        {
254            boolean o = UNSAFE.getAndSetBoolean(base, offset, true);
255            assertEquals(o, false, "getAndSet boolean");
256            boolean x = UNSAFE.getBoolean(base, offset);
257            assertEquals(x, true, "getAndSet boolean value");
258        }
259
260    }
261
262}
263
264