SunMiscUnsafeAccessTestInt.java revision 11707:ad7af1afda7a 
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 *
29 * @modules jdk.unsupported/sun.misc
30 * @run testng/othervm -Diters=100   -Xint                   compiler.unsafe.SunMiscUnsafeAccessTestInt
31 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.SunMiscUnsafeAccessTestInt
32 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  compiler.unsafe.SunMiscUnsafeAccessTestInt
33 * @run testng/othervm -Diters=20000                         compiler.unsafe.SunMiscUnsafeAccessTestInt
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 SunMiscUnsafeAccessTestInt {
45    static final int ITERS = Integer.getInteger("iters", 1);
46    static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10);
47
48    static final sun.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 = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");
63            f.setAccessible(true);
64            UNSAFE = (sun.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 = SunMiscUnsafeAccessTestInt.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 = SunMiscUnsafeAccessTestInt.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        SunMiscUnsafeAccessTestInt t = new SunMiscUnsafeAccessTestInt();
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        // Lazy
164        {
165            UNSAFE.putOrderedInt(base, offset, 0x01234567);
166            int x = UNSAFE.getIntVolatile(base, offset);
167            assertEquals(x, 0x01234567, "putRelease int value");
168        }
169
170
171
172        UNSAFE.putInt(base, offset, 0x01234567);
173
174        // Compare
175        {
176            boolean r = UNSAFE.compareAndSwapInt(base, offset, 0x01234567, 0x89ABCDEF);
177            assertEquals(r, true, "success compareAndSwap int");
178            int x = UNSAFE.getInt(base, offset);
179            assertEquals(x, 0x89ABCDEF, "success compareAndSwap int value");
180        }
181
182        {
183            boolean r = UNSAFE.compareAndSwapInt(base, offset, 0x01234567, 0xCAFEBABE);
184            assertEquals(r, false, "failing compareAndSwap int");
185            int x = UNSAFE.getInt(base, offset);
186            assertEquals(x, 0x89ABCDEF, "failing compareAndSwap int value");
187        }
188
189        UNSAFE.putInt(base, offset, 0x89ABCDEF);
190
191        // Compare set and get
192        {
193            int o = UNSAFE.getAndSetInt(base, offset, 0x01234567);
194            assertEquals(o, 0x89ABCDEF, "getAndSet int");
195            int x = UNSAFE.getInt(base, offset);
196            assertEquals(x, 0x01234567, "getAndSet int value");
197        }
198
199        UNSAFE.putInt(base, offset, 0x01234567);
200
201        // get and add, add and get
202        {
203            int o = UNSAFE.getAndAddInt(base, offset, 0x89ABCDEF);
204            assertEquals(o, 0x01234567, "getAndAdd int");
205            int x = UNSAFE.getInt(base, offset);
206            assertEquals(x, (int)(0x01234567 + 0x89ABCDEF), "getAndAdd int");
207        }
208    }
209
210    static void testAccess(long address) {
211        // Plain
212        {
213            UNSAFE.putInt(address, 0x01234567);
214            int x = UNSAFE.getInt(address);
215            assertEquals(x, 0x01234567, "set int value");
216        }
217    }
218}
219
220