1 /*
 2  * Copyright (c) 1997, 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 #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 class arrayOopDescTest {
31  public:
32 
33   static int header_size_in_bytes() {
34     return arrayOopDesc::header_size_in_bytes();
35   }
36 };
37 
38 static bool check_max_length_overflow(BasicType type) {
39   julong length = arrayOopDesc::max_array_length(type);
40   julong bytes_per_element = type2aelembytes(type);
41   julong bytes = length * bytes_per_element
42           + arrayOopDescTest::header_size_in_bytes();
43   return (julong) (size_t) bytes == bytes;
44 }
45 
46 TEST_VM(arrayOopDesc, boolean) {
47   ASSERT_PRED1(check_max_length_overflow, T_BOOLEAN);
48 }
49 
50 TEST_VM(arrayOopDesc, char) {
51   ASSERT_PRED1(check_max_length_overflow, T_CHAR);
52 }
53 
54 TEST_VM(arrayOopDesc, float) {
55   ASSERT_PRED1(check_max_length_overflow, T_FLOAT);
56 }
57 
58 TEST_VM(arrayOopDesc, double) {
59   ASSERT_PRED1(check_max_length_overflow, T_DOUBLE);
60 }
61 
62 TEST_VM(arrayOopDesc, byte) {
63   ASSERT_PRED1(check_max_length_overflow, T_BYTE);
64 }
65 
66 TEST_VM(arrayOopDesc, short) {
67   ASSERT_PRED1(check_max_length_overflow, T_SHORT);
68 }
69 
70 TEST_VM(arrayOopDesc, int) {
71   ASSERT_PRED1(check_max_length_overflow, T_INT);
72 }
73 
74 TEST_VM(arrayOopDesc, long) {
75   ASSERT_PRED1(check_max_length_overflow, T_LONG);
76 }
77 
78 TEST_VM(arrayOopDesc, object) {
79   ASSERT_PRED1(check_max_length_overflow, T_OBJECT);
80 }
81 
82 TEST_VM(arrayOopDesc, array) {
83   ASSERT_PRED1(check_max_length_overflow, T_ARRAY);
84 }
85 
86 TEST_VM(arrayOopDesc, narrowOop) {
87   ASSERT_PRED1(check_max_length_overflow, T_NARROWOOP);
88 }
89 // T_VOID and T_ADDRESS are not supported by max_array_length()