1 /*
2 * Copyright (c) 1997, 2024, 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 #include "precompiled.hpp"
25 #include "oops/arrayOop.hpp"
26 #include "oops/oop.inline.hpp"
27 #include "unittest.hpp"
28 #include "utilities/globalDefinitions.hpp"
29
30 static bool check_max_length_overflow(BasicType type) {
31 julong length = arrayOopDesc::max_array_length(type);
32 julong bytes_per_element = type2aelembytes(type);
33 julong bytes = length * bytes_per_element
34 + arrayOopDesc::base_offset_in_bytes(type);
35 return (julong) (size_t) bytes == bytes;
36 }
37
38 TEST_VM(arrayOopDesc, boolean) {
39 ASSERT_PRED1(check_max_length_overflow, T_BOOLEAN);
40 }
41
42 TEST_VM(arrayOopDesc, char) {
43 ASSERT_PRED1(check_max_length_overflow, T_CHAR);
44 }
45
46 TEST_VM(arrayOopDesc, float) {
47 ASSERT_PRED1(check_max_length_overflow, T_FLOAT);
48 }
49
50 TEST_VM(arrayOopDesc, double) {
51 ASSERT_PRED1(check_max_length_overflow, T_DOUBLE);
52 }
53
54 TEST_VM(arrayOopDesc, byte) {
55 ASSERT_PRED1(check_max_length_overflow, T_BYTE);
56 }
57
58 TEST_VM(arrayOopDesc, short) {
59 ASSERT_PRED1(check_max_length_overflow, T_SHORT);
60 }
61
62 TEST_VM(arrayOopDesc, int) {
63 ASSERT_PRED1(check_max_length_overflow, T_INT);
64 }
65
66 TEST_VM(arrayOopDesc, long) {
67 ASSERT_PRED1(check_max_length_overflow, T_LONG);
68 }
69
70 TEST_VM(arrayOopDesc, object) {
71 ASSERT_PRED1(check_max_length_overflow, T_OBJECT);
72 }
73
74 TEST_VM(arrayOopDesc, array) {
75 ASSERT_PRED1(check_max_length_overflow, T_ARRAY);
76 }
77
78 TEST_VM(arrayOopDesc, narrowOop) {
79 ASSERT_PRED1(check_max_length_overflow, T_NARROWOOP);
80 }
81 // T_VOID and T_ADDRESS are not supported by max_array_length()
82
83 TEST_VM(arrayOopDesc, base_offset) {
84 #ifdef _LP64
85 if (UseCompressedClassPointers) {
86 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BOOLEAN), 16);
87 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BYTE), 16);
88 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_SHORT), 16);
89 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_CHAR), 16);
90 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_INT), 16);
91 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_FLOAT), 16);
92 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_LONG), 16);
93 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_DOUBLE), 16);
94 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 16);
95 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 16);
96 } else {
97 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BOOLEAN), 20);
98 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BYTE), 20);
99 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_SHORT), 20);
100 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_CHAR), 20);
101 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_INT), 20);
102 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_FLOAT), 20);
103 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_LONG), 24);
104 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_DOUBLE), 24);
105 if (UseCompressedOops) {
106 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 20);
107 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 20);
108 } else {
109 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 24);
110 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 24);
111 }
112 }
113 #else
114 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BOOLEAN), 12);
115 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_BYTE), 12);
116 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_SHORT), 12);
117 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_CHAR), 12);
118 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_INT), 12);
119 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_FLOAT), 12);
120 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_LONG), 16);
121 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_DOUBLE), 16);
122 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_OBJECT), 12);
123 EXPECT_EQ(arrayOopDesc::base_offset_in_bytes(T_ARRAY), 12);
124 #endif
125 }