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 #ifndef ART_RUNTIME_MIRROR_FIELD_INL_H_
18 #define ART_RUNTIME_MIRROR_FIELD_INL_H_
19
20 #include "field.h"
21
22 #include "art_field-inl.h"
23 #include "mirror/dex_cache-inl.h"
24 #include "runtime-inl.h"
25
26 namespace art {
27
28 namespace mirror {
29
30 template <bool kTransactionActive>
CreateFromArtField(Thread * self,ArtField * field,bool force_resolve)31 inline mirror::Field* Field::CreateFromArtField(Thread* self, ArtField* field,
32 bool force_resolve) {
33 StackHandleScope<2> hs(self);
34 // Try to resolve type before allocating since this is a thread suspension point.
35 Handle<mirror::Class> type = hs.NewHandle(field->GetType<true>());
36
37 if (type.Get() == nullptr) {
38 if (force_resolve) {
39 if (kIsDebugBuild) {
40 self->AssertPendingException();
41 }
42 return nullptr;
43 } else {
44 // Can't resolve, clear the exception if it isn't OOME and continue with a null type.
45 mirror::Throwable* exception = self->GetException();
46 if (exception->GetClass()->DescriptorEquals("Ljava/lang/OutOfMemoryError;")) {
47 return nullptr;
48 }
49 self->ClearException();
50 }
51 }
52 auto ret = hs.NewHandle(static_cast<Field*>(StaticClass()->AllocObject(self)));
53 if (UNLIKELY(ret.Get() == nullptr)) {
54 self->AssertPendingOOMException();
55 return nullptr;
56 }
57 const auto pointer_size = kTransactionActive ?
58 Runtime::Current()->GetClassLinker()->GetImagePointerSize() : sizeof(void*);
59 auto dex_field_index = field->GetDexFieldIndex();
60 auto* resolved_field = field->GetDexCache()->GetResolvedField(dex_field_index, pointer_size);
61 if (field->GetDeclaringClass()->IsProxyClass()) {
62 DCHECK(field->IsStatic());
63 DCHECK_LT(dex_field_index, 2U);
64 // The two static fields (interfaces, throws) of all proxy classes
65 // share the same dex file indices 0 and 1. So, we can't resolve
66 // them in the dex cache.
67 } else {
68 if (resolved_field != nullptr) {
69 DCHECK_EQ(resolved_field, field);
70 } else {
71 // We rely on the field being resolved so that we can back to the ArtField
72 // (i.e. FromReflectedMethod).
73 field->GetDexCache()->SetResolvedField(dex_field_index, field, pointer_size);
74 }
75 }
76 ret->SetType<kTransactionActive>(type.Get());
77 ret->SetDeclaringClass<kTransactionActive>(field->GetDeclaringClass());
78 ret->SetAccessFlags<kTransactionActive>(field->GetAccessFlags());
79 ret->SetDexFieldIndex<kTransactionActive>(dex_field_index);
80 ret->SetOffset<kTransactionActive>(field->GetOffset().Int32Value());
81 return ret.Get();
82 }
83
84 } // namespace mirror
85 } // namespace art
86
87 #endif // ART_RUNTIME_MIRROR_FIELD_INL_H_
88