1/*
2 * Copyright (c) 2018, 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/oop.inline.hpp"
26#include "unittest.hpp"
27#include "utilities/globalDefinitions.hpp"
28
29static char memory[32];
30
31oop fake_object() {
32 return cast_to_oop(memory);
33}
34
35template <typename T>
36T* fake_field_addr() {
37 return reinterpret_cast<T*>(&memory[16]);
38}
39
40TEST_VM(oopDesc, field_offset_oop) {
41 // Fake object
42 oop obj = fake_object();
43
44 // Fake oop field
45 oop* oop_field_addr = fake_field_addr<oop>();
46
47 // Check offset
48 size_t oop_offset = obj->field_offset(oop_field_addr);
49 ASSERT_EQ(16u, oop_offset);
50}
51
52TEST_VM(oopDesc, field_offset_narrowOop) {
53 // Fake object
54 oop obj = fake_object();
55
56 // Fake narrowOop field
57 narrowOop* narrowOop_field_addr = fake_field_addr<narrowOop>();
58
59 size_t narrowOop_offset = obj->field_offset(narrowOop_field_addr);
60 ASSERT_EQ(16u, narrowOop_offset);
61}
62
63TEST_VM(oopDesc, field_offset_primitive) {
64 // Fake object
65 oop obj = fake_object();
66
67 // Fake primitive field
68 char* char_field_addr = fake_field_addr<char>();
69
70 size_t char_offset = obj->field_offset(char_field_addr);
71 ASSERT_EQ(16u, char_offset);
72}
73