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
24 namespace art {
25 namespace mirror {
26
27 GcRoot<Class> Field::static_class_;
28 GcRoot<Class> Field::array_class_;
29
SetClass(Class * klass)30 void 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
ResetClass()36 void Field::ResetClass() {
37 CHECK(!static_class_.IsNull());
38 static_class_ = GcRoot<Class>(nullptr);
39 }
40
SetArrayClass(Class * klass)41 void 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
ResetArrayClass()47 void Field::ResetArrayClass() {
48 CHECK(!array_class_.IsNull());
49 array_class_ = GcRoot<Class>(nullptr);
50 }
51
VisitRoots(RootVisitor * visitor)52 void Field::VisitRoots(RootVisitor* visitor) {
53 static_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
54 array_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
55 }
56
GetArtField()57 ArtField* 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->GetSFields()[0];
65 } else {
66 DCHECK_EQ(GetDexFieldIndex(), 1U);
67 return &declaring_class->GetSFields()[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