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 int
28 * @modules jdk.unsupported/sun.misc
29 * @run testng/othervm -Diters=100 -Xint SunMiscUnsafeAccessTestInt
30 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 SunMiscUnsafeAccessTestInt
31 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation SunMiscUnsafeAccessTestInt
32 * @run testng/othervm -Diters=20000 SunMiscUnsafeAccessTestInt
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 SunMiscUnsafeAccessTestInt {
42 static final int ITERS = Integer.getInteger("iters", 1);
43
44 static final sun.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 = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");
59 f.setAccessible(true);
60 UNSAFE = (sun.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 = SunMiscUnsafeAccessTestInt.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 = SunMiscUnsafeAccessTestInt.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(int[].class);
81 int ascale = UNSAFE.arrayIndexScale(int[].class);
82 ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
83 }
84
85 static int static_v;
86
87 int v;
88
89 @Test
90 public void testFieldInstance() {
91 SunMiscUnsafeAccessTestInt t = new SunMiscUnsafeAccessTestInt();
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 int[] array = new int[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 @Test
115 public void testArrayOffHeap() {
116 int size = 10;
117 long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
118 try {
119 for (int c = 0; c < ITERS; c++) {
120 for (int i = 0; i < size; i++) {
121 testAccess(null, (((long) i) << ARRAY_SHIFT) + address);
122 }
123 }
124 } finally {
125 UNSAFE.freeMemory(address);
126 }
127 }
128
129 @Test
130 public void testArrayOffHeapDirect() {
131 int size = 10;
132 long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
133 try {
134 for (int c = 0; c < ITERS; c++) {
135 for (int i = 0; i < size; i++) {
136 testAccess((((long) i) << ARRAY_SHIFT) + address);
137 }
138 }
139 } finally {
140 UNSAFE.freeMemory(address);
141 }
142 }
143
144 static void testAccess(Object base, long offset) {
145 // Plain
146 {
147 UNSAFE.putInt(base, offset, 1);
148 int x = UNSAFE.getInt(base, offset);
149 assertEquals(x, 1, "set int value");
150 }
151
152 // Volatile
153 {
154 UNSAFE.putIntVolatile(base, offset, 2);
155 int x = UNSAFE.getIntVolatile(base, offset);
156 assertEquals(x, 2, "putVolatile int value");
157 }
158
159 // Lazy
160 {
161 UNSAFE.putOrderedInt(base, offset, 1);
162 int x = UNSAFE.getIntVolatile(base, offset);
163 assertEquals(x, 1, "putRelease int value");
164 }
165
166
167
168
169 UNSAFE.putInt(base, offset, 1);
170
171 // Compare
172 {
173 boolean r = UNSAFE.compareAndSwapInt(base, offset, 1, 2);
174 assertEquals(r, true, "success compareAndSwap int");
175 int x = UNSAFE.getInt(base, offset);
176 assertEquals(x, 2, "success compareAndSwap int value");
177 }
178
179 {
180 boolean r = UNSAFE.compareAndSwapInt(base, offset, 1, 3);
181 assertEquals(r, false, "failing compareAndSwap int");
182 int x = UNSAFE.getInt(base, offset);
183 assertEquals(x, 2, "failing compareAndSwap int value");
184 }
185
186
187
188 // Compare set and get
189 {
190 int o = UNSAFE.getAndSetInt(base, offset, 1);
191 assertEquals(o, 2, "getAndSet int");
192 int x = UNSAFE.getInt(base, offset);
193 assertEquals(x, 1, "getAndSet int value");
194 }
195
196 UNSAFE.putInt(base, offset, 1);
197
198 // get and add, add and get
199 {
200 int o = UNSAFE.getAndAddInt(base, offset, 2);
201 assertEquals(o, 1, "getAndAdd int");
202 int x = UNSAFE.getInt(base, offset);
203 assertEquals(x, 1 + 2, "weakCompareAndSwapRelease int");
204 }
205 }
206
207 static void testAccess(long address) {
208 // Plain
209 {
210 UNSAFE.putInt(address, 1);
211 int x = UNSAFE.getInt(address);
212 assertEquals(x, 1, "set int value");
213 }
214 }
215 }
216
217