1 /*
2 * Copyright (c) 2014, 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 8058744
27 * @summary Invalid pattern-matching of address computations in raw unsafe
28 * @library /testlibrary
29 * @modules java.base/sun.misc
30 * java.management
31 * @run main/othervm -Xbatch UnsafeRaw
32 */
33
34 import com.oracle.java.testlibrary.Utils;
35 import java.util.Random;
36
37 public class UnsafeRaw {
38 public static class Tests {
39 public static int int_index(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
40 return unsafe.getInt(base + (index << 2));
41 }
42 public static int long_index(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
43 return unsafe.getInt(base + (index << 2));
44 }
45 public static int int_index_back_ashift(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
46 return unsafe.getInt(base + (index >> 2));
47 }
48 public static int int_index_back_lshift(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
49 return unsafe.getInt(base + (index >>> 2));
50 }
51 public static int long_index_back_ashift(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
52 return unsafe.getInt(base + (index >> 2));
53 }
54 public static int long_index_back_lshift(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
55 return unsafe.getInt(base + (index >>> 2));
56 }
57 public static int int_const_12345678_index(sun.misc.Unsafe unsafe, long base) throws Exception {
58 int idx4 = 0x12345678;
59 return unsafe.getInt(base + idx4);
60 }
61 public static int long_const_1234567890abcdef_index(sun.misc.Unsafe unsafe, long base) throws Exception {
62 long idx5 = 0x1234567890abcdefL;
63 return unsafe.getInt(base + idx5);
64 }
65 public static int int_index_mul(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
66 return unsafe.getInt(base + (index * 4));
67 }
68 public static int long_index_mul(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
69 return unsafe.getInt(base + (index * 4));
70 }
71 public static int int_index_mul_scale_16(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
72 return unsafe.getInt(base + (index * 16));
73 }
74 public static int long_index_mul_scale_16(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
75 return unsafe.getInt(base + (index * 16));
76 }
77 }
78
79 public static void main(String[] args) throws Exception {
80 sun.misc.Unsafe unsafe = Utils.getUnsafe();
81 final int array_size = 128;
82 final int element_size = 4;
83 final int magic = 0x12345678;
84
85 Random rnd = Utils.getRandomInstance();
86
87 long array = unsafe.allocateMemory(array_size * element_size); // 128 ints
88 long addr = array + array_size * element_size / 2; // something in the middle to work with
89 unsafe.putInt(addr, magic);
90 for (int j = 0; j < 100000; j++) {
91 if (Tests.int_index(unsafe, addr, 0) != magic) throw new Exception();
92 if (Tests.long_index(unsafe, addr, 0) != magic) throw new Exception();
93 if (Tests.int_index_mul(unsafe, addr, 0) != magic) throw new Exception();
94 if (Tests.long_index_mul(unsafe, addr, 0) != magic) throw new Exception();
95 {
96 long idx1 = rnd.nextLong();
97 long addr1 = addr - (idx1 << 2);
98 if (Tests.long_index(unsafe, addr1, idx1) != magic) throw new Exception();
99 }
100 {
101 long idx2 = rnd.nextLong();
102 long addr2 = addr - (idx2 >> 2);
103 if (Tests.long_index_back_ashift(unsafe, addr2, idx2) != magic) throw new Exception();
104 }
105 {
106 long idx3 = rnd.nextLong();
107 long addr3 = addr - (idx3 >>> 2);
108 if (Tests.long_index_back_lshift(unsafe, addr3, idx3) != magic) throw new Exception();
109 }
110 {
111 long idx4 = 0x12345678;
112 long addr4 = addr - idx4;
113 if (Tests.int_const_12345678_index(unsafe, addr4) != magic) throw new Exception();
114 }
115 {
116 long idx5 = 0x1234567890abcdefL;
117 long addr5 = addr - idx5;
118 if (Tests.long_const_1234567890abcdef_index(unsafe, addr5) != magic) throw new Exception();
119 }
120 {
121 int idx6 = rnd.nextInt();
122 long addr6 = addr - (idx6 >> 2);
123 if (Tests.int_index_back_ashift(unsafe, addr6, idx6) != magic) throw new Exception();
124 }
125 {
126 int idx7 = rnd.nextInt();
127 long addr7 = addr - (idx7 >>> 2);
128 if (Tests.int_index_back_lshift(unsafe, addr7, idx7) != magic) throw new Exception();
129 }
130 {
131 int idx8 = rnd.nextInt();
132 long addr8 = addr - (idx8 * 16);
133 if (Tests.int_index_mul_scale_16(unsafe, addr8, idx8) != magic) throw new Exception();
134 }
135 {
136 long idx9 = rnd.nextLong();
137 long addr9 = addr - (idx9 * 16);
138 if (Tests.long_index_mul_scale_16(unsafe, addr9, idx9) != magic) throw new Exception();
139 }
140 }
141 }
142 }