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 short
28 * @modules java.base/jdk.internal.misc
29 * @run testng/othervm -Diters=100 -Xint JdkInternalMiscUnsafeAccessTestShort
30 * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 JdkInternalMiscUnsafeAccessTestShort
31 * @run testng/othervm -Diters=20000 -XX:-TieredCompilation JdkInternalMiscUnsafeAccessTestShort
32 * @run testng/othervm -Diters=20000 JdkInternalMiscUnsafeAccessTestShort
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 JdkInternalMiscUnsafeAccessTestShort {
42 static final int ITERS = Integer.getInteger("iters", 1);
43
44 static final jdk.internal.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 = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe");
59 f.setAccessible(true);
60 UNSAFE = (jdk.internal.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 = JdkInternalMiscUnsafeAccessTestShort.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 = JdkInternalMiscUnsafeAccessTestShort.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(short[].class);
81 int ascale = UNSAFE.arrayIndexScale(short[].class);
82 ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
83 }
84
85 static short static_v;
86
87 short v;
88
89 @Test
90 public void testFieldInstance() {
91 JdkInternalMiscUnsafeAccessTestShort t = new JdkInternalMiscUnsafeAccessTestShort();
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 short[] array = new short[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.putShort(base, offset, (short)1);
148 short x = UNSAFE.getShort(base, offset);
149 assertEquals(x, (short)1, "set short value");
150 }
151
152 // Volatile
153 {
154 UNSAFE.putShortVolatile(base, offset, (short)2);
155 short x = UNSAFE.getShortVolatile(base, offset);
156 assertEquals(x, (short)2, "putVolatile short value");
157 }
158
159
160 // Lazy
161 {
162 UNSAFE.putShortRelease(base, offset, (short)1);
163 short x = UNSAFE.getShortAcquire(base, offset);
164 assertEquals(x, (short)1, "putRelease short value");
165 }
166
167 // Opaque
168 {
169 UNSAFE.putShortOpaque(base, offset, (short)2);
170 short x = UNSAFE.getShortOpaque(base, offset);
171 assertEquals(x, (short)2, "putOpaque short value");
172 }
173
174 // Unaligned
175 {
176 UNSAFE.putShortUnaligned(base, offset, (short)2);
177 short x = UNSAFE.getShortUnaligned(base, offset);
178 assertEquals(x, (short)2, "putUnaligned short value");
179 }
180
181 {
182 UNSAFE.putShortUnaligned(base, offset, (short)1, true);
183 short x = UNSAFE.getShortUnaligned(base, offset, true);
184 assertEquals(x, (short)1, "putUnaligned big endian short value");
185 }
186
187 {
188 UNSAFE.putShortUnaligned(base, offset, (short)2, false);
189 short x = UNSAFE.getShortUnaligned(base, offset, false);
190 assertEquals(x, (short)2, "putUnaligned little endian short value");
191 }
192
193
194 }
195
196 static void testAccess(long address) {
197 // Plain
198 {
199 UNSAFE.putShort(address, (short)1);
200 short x = UNSAFE.getShort(address);
201 assertEquals(x, (short)1, "set short value");
202 }
203 }
204 }
205
206