1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "field-inl.h"
18
19#include "class-inl.h"
20#include "dex_cache-inl.h"
21#include "object_array-inl.h"
22#include "object-inl.h"
23
24namespace art {
25namespace mirror {
26
27GcRoot<Class> Field::static_class_;
28GcRoot<Class> Field::array_class_;
29
30void Field::SetClass(Class* klass) {
31  CHECK(static_class_.IsNull()) << static_class_.Read() << " " << klass;
32  CHECK(klass != nullptr);
33  static_class_ = GcRoot<Class>(klass);
34}
35
36void Field::ResetClass() {
37  CHECK(!static_class_.IsNull());
38  static_class_ = GcRoot<Class>(nullptr);
39}
40
41void Field::SetArrayClass(Class* klass) {
42  CHECK(array_class_.IsNull()) << array_class_.Read() << " " << klass;
43  CHECK(klass != nullptr);
44  array_class_ = GcRoot<Class>(klass);
45}
46
47void Field::ResetArrayClass() {
48  CHECK(!array_class_.IsNull());
49  array_class_ = GcRoot<Class>(nullptr);
50}
51
52void Field::VisitRoots(RootVisitor* visitor) {
53  static_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
54  array_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
55}
56
57ArtField* Field::GetArtField() {
58  mirror::Class* declaring_class = GetDeclaringClass();
59  if (UNLIKELY(declaring_class->IsProxyClass())) {
60    DCHECK(IsStatic());
61    DCHECK_EQ(declaring_class->NumStaticFields(), 2U);
62    // 0 == Class[] interfaces; 1 == Class[][] throws;
63    if (GetDexFieldIndex() == 0) {
64      return &declaring_class->GetSFieldsPtr()->At(0);
65    } else {
66      DCHECK_EQ(GetDexFieldIndex(), 1U);
67      return &declaring_class->GetSFieldsPtr()->At(1);
68    }
69  }
70  mirror::DexCache* const dex_cache = declaring_class->GetDexCache();
71  ArtField* const art_field = dex_cache->GetResolvedField(GetDexFieldIndex(), sizeof(void*));
72  CHECK(art_field != nullptr);
73  CHECK_EQ(declaring_class, art_field->GetDeclaringClass());
74  return art_field;
75}
76
77}  // namespace mirror
78}  // namespace art
79