JdkInternalMiscUnsafeAccessTestInt.java revision 12777:0a7b3b558838 
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 int
28 *
29 * @modules java.base/jdk.internal.misc:+open
30 * @run testng/othervm -Diters=100   -Xint                   compiler.unsafe.JdkInternalMiscUnsafeAccessTestInt
31 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestInt
32 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  compiler.unsafe.JdkInternalMiscUnsafeAccessTestInt
33 * @run testng/othervm -Diters=20000                         compiler.unsafe.JdkInternalMiscUnsafeAccessTestInt
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 JdkInternalMiscUnsafeAccessTestInt {
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 = JdkInternalMiscUnsafeAccessTestInt.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 = JdkInternalMiscUnsafeAccessTestInt.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(int[].class);
85        int ascale = UNSAFE.arrayIndexScale(int[].class);
86        ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
87    }
88
89    static int static_v;
90
91    int v;
92
93    @Test
94    public void testFieldInstance() {
95        JdkInternalMiscUnsafeAccessTestInt t = new JdkInternalMiscUnsafeAccessTestInt();
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        int[] array = new int[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.putInt(base, offset, 0x01234567);
152            int x = UNSAFE.getInt(base, offset);
153            assertEquals(x, 0x01234567, "set int value");
154        }
155
156        // Volatile
157        {
158            UNSAFE.putIntVolatile(base, offset, 0x89ABCDEF);
159            int x = UNSAFE.getIntVolatile(base, offset);
160            assertEquals(x, 0x89ABCDEF, "putVolatile int value");
161        }
162
163
164        // Lazy
165        {
166            UNSAFE.putIntRelease(base, offset, 0x01234567);
167            int x = UNSAFE.getIntAcquire(base, offset);
168            assertEquals(x, 0x01234567, "putRelease int value");
169        }
170
171        // Opaque
172        {
173            UNSAFE.putIntOpaque(base, offset, 0x89ABCDEF);
174            int x = UNSAFE.getIntOpaque(base, offset);
175            assertEquals(x, 0x89ABCDEF, "putOpaque int value");
176        }
177
178        // Unaligned
179        {
180            UNSAFE.putIntUnaligned(base, offset, 0x89ABCDEF);
181            int x = UNSAFE.getIntUnaligned(base, offset);
182            assertEquals(x, 0x89ABCDEF, "putUnaligned int value");
183        }
184
185        {
186            UNSAFE.putIntUnaligned(base, offset, 0x01234567, true);
187            int x = UNSAFE.getIntUnaligned(base, offset, true);
188            assertEquals(x, 0x01234567, "putUnaligned big endian int value");
189        }
190
191        {
192            UNSAFE.putIntUnaligned(base, offset, 0x89ABCDEF, false);
193            int x = UNSAFE.getIntUnaligned(base, offset, false);
194            assertEquals(x, 0x89ABCDEF, "putUnaligned little endian int value");
195        }
196
197        UNSAFE.putInt(base, offset, 0x01234567);
198
199        // Compare
200        {
201            boolean r = UNSAFE.compareAndSetInt(base, offset, 0x01234567, 0x89ABCDEF);
202            assertEquals(r, true, "success compareAndSet int");
203            int x = UNSAFE.getInt(base, offset);
204            assertEquals(x, 0x89ABCDEF, "success compareAndSet int value");
205        }
206
207        {
208            boolean r = UNSAFE.compareAndSetInt(base, offset, 0x01234567, 0xCAFEBABE);
209            assertEquals(r, false, "failing compareAndSet int");
210            int x = UNSAFE.getInt(base, offset);
211            assertEquals(x, 0x89ABCDEF, "failing compareAndSet int value");
212        }
213
214        // Advanced compare
215        {
216            int r = UNSAFE.compareAndExchangeInt(base, offset, 0x89ABCDEF, 0x01234567);
217            assertEquals(r, 0x89ABCDEF, "success compareAndExchange int");
218            int x = UNSAFE.getInt(base, offset);
219            assertEquals(x, 0x01234567, "success compareAndExchange int value");
220        }
221
222        {
223            int r = UNSAFE.compareAndExchangeInt(base, offset, 0x89ABCDEF, 0xCAFEBABE);
224            assertEquals(r, 0x01234567, "failing compareAndExchange int");
225            int x = UNSAFE.getInt(base, offset);
226            assertEquals(x, 0x01234567, "failing compareAndExchange int value");
227        }
228
229        {
230            int r = UNSAFE.compareAndExchangeIntAcquire(base, offset, 0x01234567, 0x89ABCDEF);
231            assertEquals(r, 0x01234567, "success compareAndExchangeAcquire int");
232            int x = UNSAFE.getInt(base, offset);
233            assertEquals(x, 0x89ABCDEF, "success compareAndExchangeAcquire int value");
234        }
235
236        {
237            int r = UNSAFE.compareAndExchangeIntAcquire(base, offset, 0x01234567, 0xCAFEBABE);
238            assertEquals(r, 0x89ABCDEF, "failing compareAndExchangeAcquire int");
239            int x = UNSAFE.getInt(base, offset);
240            assertEquals(x, 0x89ABCDEF, "failing compareAndExchangeAcquire int value");
241        }
242
243        {
244            int r = UNSAFE.compareAndExchangeIntRelease(base, offset, 0x89ABCDEF, 0x01234567);
245            assertEquals(r, 0x89ABCDEF, "success compareAndExchangeRelease int");
246            int x = UNSAFE.getInt(base, offset);
247            assertEquals(x, 0x01234567, "success compareAndExchangeRelease int value");
248        }
249
250        {
251            int r = UNSAFE.compareAndExchangeIntRelease(base, offset, 0x89ABCDEF, 0xCAFEBABE);
252            assertEquals(r, 0x01234567, "failing compareAndExchangeRelease int");
253            int x = UNSAFE.getInt(base, offset);
254            assertEquals(x, 0x01234567, "failing compareAndExchangeRelease int value");
255        }
256
257        {
258            boolean success = false;
259            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
260                success = UNSAFE.weakCompareAndSetIntPlain(base, offset, 0x01234567, 0x89ABCDEF);
261            }
262            assertEquals(success, true, "weakCompareAndSetPlain int");
263            int x = UNSAFE.getInt(base, offset);
264            assertEquals(x, 0x89ABCDEF, "weakCompareAndSetPlain int value");
265        }
266
267        {
268            boolean success = false;
269            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
270                success = UNSAFE.weakCompareAndSetIntAcquire(base, offset, 0x89ABCDEF, 0x01234567);
271            }
272            assertEquals(success, true, "weakCompareAndSetAcquire int");
273            int x = UNSAFE.getInt(base, offset);
274            assertEquals(x, 0x01234567, "weakCompareAndSetAcquire int");
275        }
276
277        {
278            boolean success = false;
279            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
280                success = UNSAFE.weakCompareAndSetIntRelease(base, offset, 0x01234567, 0x89ABCDEF);
281            }
282            assertEquals(success, true, "weakCompareAndSetRelease int");
283            int x = UNSAFE.getInt(base, offset);
284            assertEquals(x, 0x89ABCDEF, "weakCompareAndSetRelease int");
285        }
286
287        {
288            boolean success = false;
289            for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
290                success = UNSAFE.weakCompareAndSetInt(base, offset, 0x89ABCDEF, 0x01234567);
291            }
292            assertEquals(success, true, "weakCompareAndSet int");
293            int x = UNSAFE.getInt(base, offset);
294            assertEquals(x, 0x01234567, "weakCompareAndSet int");
295        }
296
297        UNSAFE.putInt(base, offset, 0x89ABCDEF);
298
299        // Compare set and get
300        {
301            int o = UNSAFE.getAndSetInt(base, offset, 0x01234567);
302            assertEquals(o, 0x89ABCDEF, "getAndSet int");
303            int x = UNSAFE.getInt(base, offset);
304            assertEquals(x, 0x01234567, "getAndSet int value");
305        }
306
307        UNSAFE.putInt(base, offset, 0x01234567);
308
309        // get and add, add and get
310        {
311            int o = UNSAFE.getAndAddInt(base, offset, 0x89ABCDEF);
312            assertEquals(o, 0x01234567, "getAndAdd int");
313            int x = UNSAFE.getInt(base, offset);
314            assertEquals(x, (int)(0x01234567 + 0x89ABCDEF), "getAndAdd int");
315        }
316    }
317
318    static void testAccess(long address) {
319        // Plain
320        {
321            UNSAFE.putInt(address, 0x01234567);
322            int x = UNSAFE.getInt(address);
323            assertEquals(x, 0x01234567, "set int value");
324        }
325    }
326}
327