1 /*
2 * Copyright (c) 2016, 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 /*
26 * @test
27 * @bug 8150465
28 * @summary Unsafe methods to produce uninitialized arrays
29 * @modules java.base/jdk.internal.misc
30 * @run main/othervm -ea -Diters=200 -Xint AllocateUninitializedArray
31 * @run main/othervm -ea -Diters=30000 -XX:TieredStopAtLevel=1 AllocateUninitializedArray
32 * @run main/othervm -ea -Diters=30000 -XX:TieredStopAtLevel=4 AllocateUninitializedArray
33 */
34 import java.lang.reflect.Field;
35 import java.lang.reflect.Array;
36 import java.util.concurrent.Callable;
37
38 public class AllocateUninitializedArray {
39 static final int ITERS = Integer.getInteger("iters", 1);
40 static final jdk.internal.misc.Unsafe UNSAFE;
41
42 static {
43 try {
44 Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe");
45 f.setAccessible(true);
46 UNSAFE = (jdk.internal.misc.Unsafe) f.get(null);
47 } catch (Exception e) {
48 throw new RuntimeException("Unable to get Unsafe instance.", e);
49 }
50 }
51
52 public static void main(String... args) throws Exception {
53 testIAE(AllConstants::testObject);
54 testIAE(LengthIsConstant::testObject);
55 testIAE(ClassIsConstant::testObject);
56 testIAE(NothingIsConstant::testObject);
57
58 testIAE(AllConstants::testArray);
59 testIAE(LengthIsConstant::testArray);
60 testIAE(ClassIsConstant::testArray);
61 testIAE(NothingIsConstant::testArray);
62
63 testIAE(AllConstants::testNull);
64 testIAE(LengthIsConstant::testNull);
65 testIAE(ClassIsConstant::testNull);
66 testIAE(NothingIsConstant::testNull);
67
68 testOK(boolean[].class, 10, AllConstants::testBoolean);
69 testOK(byte[].class, 10, AllConstants::testByte);
70 testOK(short[].class, 10, AllConstants::testShort);
71 testOK(char[].class, 10, AllConstants::testChar);
72 testOK(int[].class, 10, AllConstants::testInt);
73 testOK(float[].class, 10, AllConstants::testFloat);
74 testOK(long[].class, 10, AllConstants::testLong);
75 testOK(double[].class, 10, AllConstants::testDouble);
76
77 testOK(boolean[].class, 10, LengthIsConstant::testBoolean);
78 testOK(byte[].class, 10, LengthIsConstant::testByte);
79 testOK(short[].class, 10, LengthIsConstant::testShort);
80 testOK(char[].class, 10, LengthIsConstant::testChar);
81 testOK(int[].class, 10, LengthIsConstant::testInt);
82 testOK(float[].class, 10, LengthIsConstant::testFloat);
83 testOK(long[].class, 10, LengthIsConstant::testLong);
84 testOK(double[].class, 10, LengthIsConstant::testDouble);
85
86 testOK(boolean[].class, 10, ClassIsConstant::testBoolean);
87 testOK(byte[].class, 10, ClassIsConstant::testByte);
88 testOK(short[].class, 10, ClassIsConstant::testShort);
89 testOK(char[].class, 10, ClassIsConstant::testChar);
90 testOK(int[].class, 10, ClassIsConstant::testInt);
91 testOK(float[].class, 10, ClassIsConstant::testFloat);
92 testOK(long[].class, 10, ClassIsConstant::testLong);
93 testOK(double[].class, 10, ClassIsConstant::testDouble);
94
95 testOK(boolean[].class, 10, NothingIsConstant::testBoolean);
96 testOK(byte[].class, 10, NothingIsConstant::testByte);
97 testOK(short[].class, 10, NothingIsConstant::testShort);
98 testOK(char[].class, 10, NothingIsConstant::testChar);
99 testOK(int[].class, 10, NothingIsConstant::testInt);
100 testOK(float[].class, 10, NothingIsConstant::testFloat);
101 testOK(long[].class, 10, NothingIsConstant::testLong);
102 testOK(double[].class, 10, NothingIsConstant::testDouble);
103 }
104
105 public static void testOK(Class<?> expectClass, int expectLen, Callable<Object> test) throws Exception {
106 for (int c = 0; c < ITERS; c++) {
107 Object res = test.call();
108 Class<?> actualClass = res.getClass();
109 if (!actualClass.equals(expectClass)) {
110 throw new IllegalStateException("Wrong class: expected = " + expectClass + ", but got " + actualClass);
111 }
112 int actualLen = Array.getLength(res);
113 if (actualLen != expectLen) {
114 throw new IllegalStateException("Wrong length: expected = " + expectLen + ", but got " + actualLen);
115 }
116 }
117 }
118
119 static volatile Object sink;
120
121 public static void testIAE(Callable<Object> test) throws Exception {
122 for (int c = 0; c < ITERS; c++) {
123 try {
124 sink = test.call();
125 throw new IllegalStateException("Expected IAE");
126 } catch (IllegalArgumentException iae) {
127 // expected
128 }
129 }
130 }
131
132 static volatile int sampleLenNeg = -1;
133 static volatile int sampleLenZero = 0;
134 static volatile int sampleLen = 10;
135
136
137 static volatile Class<?> classBoolean = boolean.class;
138 static volatile Class<?> classByte = byte.class;
139 static volatile Class<?> classShort = short.class;
140 static volatile Class<?> classChar = char.class;
141 static volatile Class<?> classInt = int.class;
142 static volatile Class<?> classFloat = float.class;
143 static volatile Class<?> classLong = long.class;
144 static volatile Class<?> classDouble = double.class;
145 static volatile Class<?> classObject = Object.class;
146 static volatile Class<?> classArray = Object[].class;
147 static volatile Class<?> classNull = null;
148
149 static class AllConstants {
150 static Object testBoolean() { return UNSAFE.allocateUninitializedArray(boolean.class, 10); }
151 static Object testByte() { return UNSAFE.allocateUninitializedArray(byte.class, 10); }
152 static Object testShort() { return UNSAFE.allocateUninitializedArray(short.class, 10); }
153 static Object testChar() { return UNSAFE.allocateUninitializedArray(char.class, 10); }
154 static Object testInt() { return UNSAFE.allocateUninitializedArray(int.class, 10); }
155 static Object testFloat() { return UNSAFE.allocateUninitializedArray(float.class, 10); }
156 static Object testLong() { return UNSAFE.allocateUninitializedArray(long.class, 10); }
157 static Object testDouble() { return UNSAFE.allocateUninitializedArray(double.class, 10); }
158 static Object testObject() { return UNSAFE.allocateUninitializedArray(Object.class, 10); }
159 static Object testArray() { return UNSAFE.allocateUninitializedArray(Object[].class, 10); }
160 static Object testNull() { return UNSAFE.allocateUninitializedArray(null, 10); }
161 static Object testZero() { return UNSAFE.allocateUninitializedArray(int.class, 0); }
162 static Object testNeg() { return UNSAFE.allocateUninitializedArray(int.class, -1); }
163 }
164
165 static class ClassIsConstant {
166 static Object testBoolean() { return UNSAFE.allocateUninitializedArray(boolean.class, sampleLen); }
167 static Object testByte() { return UNSAFE.allocateUninitializedArray(byte.class, sampleLen); }
168 static Object testShort() { return UNSAFE.allocateUninitializedArray(short.class, sampleLen); }
169 static Object testChar() { return UNSAFE.allocateUninitializedArray(char.class, sampleLen); }
170 static Object testInt() { return UNSAFE.allocateUninitializedArray(int.class, sampleLen); }
171 static Object testFloat() { return UNSAFE.allocateUninitializedArray(float.class, sampleLen); }
172 static Object testLong() { return UNSAFE.allocateUninitializedArray(long.class, sampleLen); }
173 static Object testDouble() { return UNSAFE.allocateUninitializedArray(double.class, sampleLen); }
174 static Object testObject() { return UNSAFE.allocateUninitializedArray(Object.class, sampleLen); }
175 static Object testArray() { return UNSAFE.allocateUninitializedArray(Object[].class, sampleLen); }
176 static Object testNull() { return UNSAFE.allocateUninitializedArray(null, sampleLen); }
177 static Object testZero() { return UNSAFE.allocateUninitializedArray(int.class, sampleLenZero); }
178 static Object testNeg() { return UNSAFE.allocateUninitializedArray(int.class, sampleLenNeg); }
179 }
180
181 static class LengthIsConstant {
182 static Object testBoolean() { return UNSAFE.allocateUninitializedArray(classBoolean, 10); }
183 static Object testByte() { return UNSAFE.allocateUninitializedArray(classByte, 10); }
184 static Object testShort() { return UNSAFE.allocateUninitializedArray(classShort, 10); }
185 static Object testChar() { return UNSAFE.allocateUninitializedArray(classChar, 10); }
186 static Object testInt() { return UNSAFE.allocateUninitializedArray(classInt, 10); }
187 static Object testFloat() { return UNSAFE.allocateUninitializedArray(classFloat, 10); }
188 static Object testLong() { return UNSAFE.allocateUninitializedArray(classLong, 10); }
189 static Object testDouble() { return UNSAFE.allocateUninitializedArray(classDouble, 10); }
190 static Object testObject() { return UNSAFE.allocateUninitializedArray(classObject, 10); }
191 static Object testArray() { return UNSAFE.allocateUninitializedArray(classArray, 10); }
192 static Object testNull() { return UNSAFE.allocateUninitializedArray(classNull, 10); }
193 static Object testZero() { return UNSAFE.allocateUninitializedArray(classInt, 0); }
194 static Object testNeg() { return UNSAFE.allocateUninitializedArray(classInt, -1); }
195 }
196
197 static class NothingIsConstant {
198 static Object testBoolean() { return UNSAFE.allocateUninitializedArray(classBoolean, sampleLen); }
199 static Object testByte() { return UNSAFE.allocateUninitializedArray(classByte, sampleLen); }
200 static Object testShort() { return UNSAFE.allocateUninitializedArray(classShort, sampleLen); }
201 static Object testChar() { return UNSAFE.allocateUninitializedArray(classChar, sampleLen); }
202 static Object testInt() { return UNSAFE.allocateUninitializedArray(classInt, sampleLen); }
203 static Object testFloat() { return UNSAFE.allocateUninitializedArray(classFloat, sampleLen); }
204 static Object testLong() { return UNSAFE.allocateUninitializedArray(classLong, sampleLen); }
205 static Object testDouble() { return UNSAFE.allocateUninitializedArray(classDouble, sampleLen); }
206 static Object testObject() { return UNSAFE.allocateUninitializedArray(classObject, sampleLen); }
207 static Object testArray() { return UNSAFE.allocateUninitializedArray(classArray, sampleLen); }
208 static Object testNull() { return UNSAFE.allocateUninitializedArray(classNull, sampleLen); }
209 static Object testZero() { return UNSAFE.allocateUninitializedArray(classInt, sampleLenZero); }
210 static Object testNeg() { return UNSAFE.allocateUninitializedArray(classInt, sampleLenNeg); }
211 }
212 }
213