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 Object
28 *
29 * @modules java.base/jdk.internal.misc:+open
30 * @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestObject
31 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestObject
32 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestObject
33 * @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestObject
34 */
35
36 package compiler.unsafe;
37
38 import org.testng.annotations.Test;
39
40 import java.lang.reflect.Field;
41
42 import static org.testng.Assert.*;
43
44 public class JdkInternalMiscUnsafeAccessTestObject {
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 = JdkInternalMiscUnsafeAccessTestObject.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 = JdkInternalMiscUnsafeAccessTestObject.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(Object[].class);
85 int ascale = UNSAFE.arrayIndexScale(Object[].class);
86 ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
87 }
88
89 static Object static_v;
90
91 Object v;
92
93 @Test
94 public void testFieldInstance() {
95 JdkInternalMiscUnsafeAccessTestObject t = new JdkInternalMiscUnsafeAccessTestObject();
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 Object[] array = new Object[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.putReference(base, offset, "foo");
123 Object x = UNSAFE.getReference(base, offset);
124 assertEquals(x, "foo", "set Object value");
125 }
126
127 // Volatile
128 {
129 UNSAFE.putReferenceVolatile(base, offset, "bar");
130 Object x = UNSAFE.getReferenceVolatile(base, offset);
131 assertEquals(x, "bar", "putVolatile Object value");
132 }
133
134
135 // Lazy
136 {
137 UNSAFE.putReferenceRelease(base, offset, "foo");
138 Object x = UNSAFE.getReferenceAcquire(base, offset);
139 assertEquals(x, "foo", "putRelease Object value");
140 }
141
142 // Opaque
143 {
144 UNSAFE.putReferenceOpaque(base, offset, "bar");
145 Object x = UNSAFE.getReferenceOpaque(base, offset);
146 assertEquals(x, "bar", "putOpaque Object value");
147 }
148
149
150 UNSAFE.putReference(base, offset, "foo");
151
152 // Compare
153 {
154 boolean r = UNSAFE.compareAndSetReference(base, offset, "foo", "bar");
155 assertEquals(r, true, "success compareAndSet Object");
156 Object x = UNSAFE.getReference(base, offset);
157 assertEquals(x, "bar", "success compareAndSet Object value");
158 }
159
160 {
161 boolean r = UNSAFE.compareAndSetReference(base, offset, "foo", "baz");
162 assertEquals(r, false, "failing compareAndSet Object");
163 Object x = UNSAFE.getReference(base, offset);
164 assertEquals(x, "bar", "failing compareAndSet Object value");
165 }
166
167 // Advanced compare
168 {
169 Object r = UNSAFE.compareAndExchangeReference(base, offset, "bar", "foo");
170 assertEquals(r, "bar", "success compareAndExchange Object");
171 Object x = UNSAFE.getReference(base, offset);
172 assertEquals(x, "foo", "success compareAndExchange Object value");
173 }
174
175 {
176 Object r = UNSAFE.compareAndExchangeReference(base, offset, "bar", "baz");
177 assertEquals(r, "foo", "failing compareAndExchange Object");
178 Object x = UNSAFE.getReference(base, offset);
179 assertEquals(x, "foo", "failing compareAndExchange Object value");
180 }
181
182 {
183 Object r = UNSAFE.compareAndExchangeReferenceAcquire(base, offset, "foo", "bar");
184 assertEquals(r, "foo", "success compareAndExchangeAcquire Object");
185 Object x = UNSAFE.getReference(base, offset);
186 assertEquals(x, "bar", "success compareAndExchangeAcquire Object value");
187 }
188
189 {
190 Object r = UNSAFE.compareAndExchangeReferenceAcquire(base, offset, "foo", "baz");
191 assertEquals(r, "bar", "failing compareAndExchangeAcquire Object");
192 Object x = UNSAFE.getReference(base, offset);
193 assertEquals(x, "bar", "failing compareAndExchangeAcquire Object value");
194 }
195
196 {
197 Object r = UNSAFE.compareAndExchangeReferenceRelease(base, offset, "bar", "foo");
198 assertEquals(r, "bar", "success compareAndExchangeRelease Object");
199 Object x = UNSAFE.getReference(base, offset);
200 assertEquals(x, "foo", "success compareAndExchangeRelease Object value");
201 }
202
203 {
204 Object r = UNSAFE.compareAndExchangeReferenceRelease(base, offset, "bar", "baz");
205 assertEquals(r, "foo", "failing compareAndExchangeRelease Object");
206 Object x = UNSAFE.getReference(base, offset);
207 assertEquals(x, "foo", "failing compareAndExchangeRelease Object value");
208 }
209
210 {
211 boolean success = false;
212 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
213 success = UNSAFE.weakCompareAndSetReferencePlain(base, offset, "foo", "bar");
214 }
215 assertEquals(success, true, "weakCompareAndSetPlain Object");
216 Object x = UNSAFE.getReference(base, offset);
217 assertEquals(x, "bar", "weakCompareAndSetPlain Object value");
218 }
219
220 {
221 boolean success = false;
222 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
223 success = UNSAFE.weakCompareAndSetReferenceAcquire(base, offset, "bar", "foo");
224 }
225 assertEquals(success, true, "weakCompareAndSetAcquire Object");
226 Object x = UNSAFE.getReference(base, offset);
227 assertEquals(x, "foo", "weakCompareAndSetAcquire Object");
228 }
229
230 {
231 boolean success = false;
232 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
233 success = UNSAFE.weakCompareAndSetReferenceRelease(base, offset, "foo", "bar");
234 }
235 assertEquals(success, true, "weakCompareAndSetRelease Object");
236 Object x = UNSAFE.getReference(base, offset);
237 assertEquals(x, "bar", "weakCompareAndSetRelease Object");
238 }
239
240 {
241 boolean success = false;
242 for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
243 success = UNSAFE.weakCompareAndSetReference(base, offset, "bar", "foo");
244 }
245 assertEquals(success, true, "weakCompareAndSet Object");
246 Object x = UNSAFE.getReference(base, offset);
247 assertEquals(x, "foo", "weakCompareAndSet Object");
248 }
249
250 UNSAFE.putReference(base, offset, "bar");
251
252 // Compare set and get
253 {
254 Object o = UNSAFE.getAndSetReference(base, offset, "foo");
255 assertEquals(o, "bar", "getAndSet Object");
256 Object x = UNSAFE.getReference(base, offset);
257 assertEquals(x, "foo", "getAndSet Object value");
258 }
259
260 }
261
262 }