1/*
2 * Copyright (c) 2011, 2017, 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#include "precompiled.hpp"
26#include "classfile/javaClasses.hpp"
27#include "classfile/systemDictionary.hpp"
28#include "gc/shared/collectedHeap.inline.hpp"
29#include "gc/shared/specialized_oop_closures.hpp"
30#include "memory/iterator.inline.hpp"
31#include "memory/oopFactory.hpp"
32#include "oops/instanceKlass.hpp"
33#include "oops/instanceMirrorKlass.hpp"
34#include "oops/instanceOop.hpp"
35#include "oops/oop.inline.hpp"
36#include "oops/symbol.hpp"
37#include "runtime/handles.inline.hpp"
38#include "utilities/macros.hpp"
39
40int InstanceMirrorKlass::_offset_of_static_fields = 0;
41
42int InstanceMirrorKlass::instance_size(Klass* k) {
43  if (k != NULL && k->is_instance_klass()) {
44    return align_object_size(size_helper() + InstanceKlass::cast(k)->static_field_size());
45  }
46  return size_helper();
47}
48
49instanceOop InstanceMirrorKlass::allocate_instance(Klass* k, TRAPS) {
50  // Query before forming handle.
51  int size = instance_size(k);
52  assert(size > 0, "total object size must be positive: %d", size);
53
54  // Since mirrors can be variable sized because of the static fields, store
55  // the size in the mirror itself.
56  return (instanceOop)CollectedHeap::class_allocate(this, size, CHECK_NULL);
57}
58
59int InstanceMirrorKlass::oop_size(oop obj) const {
60  return java_lang_Class::oop_size(obj);
61}
62
63int InstanceMirrorKlass::compute_static_oop_field_count(oop obj) {
64  Klass* k = java_lang_Class::as_Klass(obj);
65  if (k != NULL && k->is_instance_klass()) {
66    return InstanceKlass::cast(k)->static_oop_field_count();
67  }
68  return 0;
69}
70