1 /*
2 * Copyright (C) 2017 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_CLASS_EXT_INL_H_
18 #define ART_RUNTIME_MIRROR_CLASS_EXT_INL_H_
19
20 #include "class_ext.h"
21
22 #include "array-inl.h"
23 #include "art_method-inl.h"
24 #include "base/enums.h"
25 #include "base/globals.h"
26 #include "handle_scope.h"
27 #include "jni/jni_internal.h"
28 #include "jni_id_type.h"
29 #include "mirror/array.h"
30 #include "mirror/object.h"
31 #include "object-inl.h"
32 #include "verify_object.h"
33 #include "well_known_classes.h"
34
35 namespace art {
36 namespace mirror {
37
38 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
EnsureJniIdsArrayPresent(MemberOffset off,size_t count)39 inline bool ClassExt::EnsureJniIdsArrayPresent(MemberOffset off, size_t count) {
40 ObjPtr<Object> existing(
41 GetFieldObject<Object, kVerifyFlags, kReadBarrierOption>(off));
42 if (!existing.IsNull()) {
43 return true;
44 }
45 Thread* self = Thread::Current();
46 StackHandleScope<2> hs(self);
47 Handle<ClassExt> h_this(hs.NewHandle(this));
48 MutableHandle<Object> new_arr(hs.NewHandle<Object>(nullptr));
49 if (UNLIKELY(Runtime::Current()->GetJniIdType() == JniIdType::kSwapablePointer)) {
50 new_arr.Assign(Runtime::Current()->GetJniIdManager()->GetPointerMarker());
51 } else {
52 new_arr.Assign(Runtime::Current()->GetClassLinker()->AllocPointerArray(self, count));
53 }
54 if (new_arr.IsNull()) {
55 // Fail.
56 self->AssertPendingOOMException();
57 return false;
58 }
59 bool set;
60 // Set the ext_data_ field using CAS semantics.
61 if (Runtime::Current()->IsActiveTransaction()) {
62 set = h_this->CasFieldObject<true>(
63 off, nullptr, new_arr.Get(), CASMode::kStrong, std::memory_order_seq_cst);
64 } else {
65 set = h_this->CasFieldObject<false>(
66 off, nullptr, new_arr.Get(), CASMode::kStrong, std::memory_order_seq_cst);
67 }
68 if (kIsDebugBuild) {
69 ObjPtr<Object> ret(
70 set ? new_arr.Get()
71 : h_this->GetFieldObject<PointerArray, kVerifyFlags, kReadBarrierOption>(off));
72 CHECK(!ret.IsNull());
73 }
74 return true;
75 }
76
77 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
EnsureJMethodIDsArrayPresent(size_t count)78 inline bool ClassExt::EnsureJMethodIDsArrayPresent(size_t count) {
79 return EnsureJniIdsArrayPresent<kVerifyFlags, kReadBarrierOption>(
80 MemberOffset(OFFSET_OF_OBJECT_MEMBER(ClassExt, jmethod_ids_)), count);
81 }
82 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
EnsureStaticJFieldIDsArrayPresent(size_t count)83 inline bool ClassExt::EnsureStaticJFieldIDsArrayPresent(size_t count) {
84 return EnsureJniIdsArrayPresent<kVerifyFlags, kReadBarrierOption>(
85 MemberOffset(OFFSET_OF_OBJECT_MEMBER(ClassExt, static_jfield_ids_)), count);
86 }
87 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
EnsureInstanceJFieldIDsArrayPresent(size_t count)88 inline bool ClassExt::EnsureInstanceJFieldIDsArrayPresent(size_t count) {
89 return EnsureJniIdsArrayPresent<kVerifyFlags, kReadBarrierOption>(
90 MemberOffset(OFFSET_OF_OBJECT_MEMBER(ClassExt, instance_jfield_ids_)), count);
91 }
92
93 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
GetInstanceJFieldIDs()94 inline ObjPtr<Object> ClassExt::GetInstanceJFieldIDs() {
95 return GetFieldObject<Object, kVerifyFlags, kReadBarrierOption>(
96 OFFSET_OF_OBJECT_MEMBER(ClassExt, instance_jfield_ids_));
97 }
98 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
HasInstanceFieldPointerIdMarker()99 inline bool ClassExt::HasInstanceFieldPointerIdMarker() {
100 ObjPtr<Object> arr(GetInstanceJFieldIDs<kVerifyFlags, kReadBarrierOption>());
101 return !arr.IsNull() && !arr->IsArrayInstance();
102 }
103 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
GetInstanceJFieldIDsPointerArray()104 inline ObjPtr<PointerArray> ClassExt::GetInstanceJFieldIDsPointerArray() {
105 DCHECK(!HasInstanceFieldPointerIdMarker());
106 return down_cast<PointerArray*>(GetInstanceJFieldIDs<kVerifyFlags, kReadBarrierOption>().Ptr());
107 }
108
109 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
GetStaticJFieldIDs()110 inline ObjPtr<Object> ClassExt::GetStaticJFieldIDs() {
111 return GetFieldObject<Object, kVerifyFlags, kReadBarrierOption>(
112 OFFSET_OF_OBJECT_MEMBER(ClassExt, static_jfield_ids_));
113 }
114 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
GetStaticJFieldIDsPointerArray()115 inline ObjPtr<PointerArray> ClassExt::GetStaticJFieldIDsPointerArray() {
116 DCHECK(!HasStaticFieldPointerIdMarker());
117 return down_cast<PointerArray*>(GetStaticJFieldIDs<kVerifyFlags, kReadBarrierOption>().Ptr());
118 }
119 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
HasStaticFieldPointerIdMarker()120 inline bool ClassExt::HasStaticFieldPointerIdMarker() {
121 ObjPtr<Object> arr(GetStaticJFieldIDs<kVerifyFlags, kReadBarrierOption>());
122 return !arr.IsNull() && !arr->IsArrayInstance();
123 }
124
125 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
GetObsoleteClass()126 inline ObjPtr<Class> ClassExt::GetObsoleteClass() {
127 return GetFieldObject<Class, kVerifyFlags, kReadBarrierOption>(
128 OFFSET_OF_OBJECT_MEMBER(ClassExt, obsolete_class_));
129 }
130
131 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
GetJMethodIDs()132 inline ObjPtr<Object> ClassExt::GetJMethodIDs() {
133 return GetFieldObject<Object, kVerifyFlags, kReadBarrierOption>(
134 OFFSET_OF_OBJECT_MEMBER(ClassExt, jmethod_ids_));
135 }
136 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
GetJMethodIDsPointerArray()137 inline ObjPtr<PointerArray> ClassExt::GetJMethodIDsPointerArray() {
138 DCHECK(!HasMethodPointerIdMarker());
139 return down_cast<PointerArray*>(GetJMethodIDs<kVerifyFlags, kReadBarrierOption>().Ptr());
140 }
141 template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption>
HasMethodPointerIdMarker()142 inline bool ClassExt::HasMethodPointerIdMarker() {
143 ObjPtr<Object> arr(GetJMethodIDs<kVerifyFlags, kReadBarrierOption>());
144 return !arr.IsNull() && !arr->IsArrayInstance();
145 }
146
GetErroneousStateError()147 inline ObjPtr<Throwable> ClassExt::GetErroneousStateError() {
148 return GetFieldObject<Throwable>(OFFSET_OF_OBJECT_MEMBER(ClassExt, erroneous_state_error_));
149 }
150
GetObsoleteDexCaches()151 inline ObjPtr<ObjectArray<DexCache>> ClassExt::GetObsoleteDexCaches() {
152 return GetFieldObject<ObjectArray<DexCache>>(
153 OFFSET_OF_OBJECT_MEMBER(ClassExt, obsolete_dex_caches_));
154 }
155
156 template<VerifyObjectFlags kVerifyFlags,
157 ReadBarrierOption kReadBarrierOption>
GetObsoleteMethods()158 inline ObjPtr<PointerArray> ClassExt::GetObsoleteMethods() {
159 return GetFieldObject<PointerArray, kVerifyFlags, kReadBarrierOption>(
160 OFFSET_OF_OBJECT_MEMBER(ClassExt, obsolete_methods_));
161 }
162
GetOriginalDexFile()163 inline ObjPtr<Object> ClassExt::GetOriginalDexFile() {
164 return GetFieldObject<Object>(OFFSET_OF_OBJECT_MEMBER(ClassExt, original_dex_file_));
165 }
166
167 template<ReadBarrierOption kReadBarrierOption, class Visitor>
VisitNativeRoots(Visitor & visitor,PointerSize pointer_size)168 void ClassExt::VisitNativeRoots(Visitor& visitor, PointerSize pointer_size) {
169 VisitMethods<kReadBarrierOption>([&](ArtMethod* method) {
170 method->VisitRoots<kReadBarrierOption>(visitor, pointer_size);
171 }, pointer_size);
172 }
173
174 template<ReadBarrierOption kReadBarrierOption, class Visitor>
VisitMethods(Visitor visitor,PointerSize pointer_size)175 void ClassExt::VisitMethods(Visitor visitor, PointerSize pointer_size) {
176 ObjPtr<PointerArray> arr(GetObsoleteMethods<kDefaultVerifyFlags, kReadBarrierOption>());
177 if (!arr.IsNull()) {
178 int32_t len = arr->GetLength();
179 for (int32_t i = 0; i < len; i++) {
180 ArtMethod* method = arr->GetElementPtrSize<ArtMethod*>(i, pointer_size);
181 if (method != nullptr) {
182 visitor(method);
183 }
184 }
185 }
186 }
187
188 template<ReadBarrierOption kReadBarrierOption, class Visitor>
VisitJMethodIDs(Visitor v)189 void ClassExt::VisitJMethodIDs(Visitor v) {
190 ObjPtr<Object> arr(GetJMethodIDs<kDefaultVerifyFlags, kReadBarrierOption>());
191 if (!arr.IsNull() && arr->IsArrayInstance()) {
192 ObjPtr<PointerArray> marr(down_cast<PointerArray*>(arr.Ptr()));
193 int32_t len = marr->GetLength();
194 for (int32_t i = 0; i < len; i++) {
195 jmethodID id = marr->GetElementPtrSize<jmethodID>(i, kRuntimePointerSize);
196 if (id != nullptr) {
197 v(id, i);
198 }
199 }
200 }
201 }
202 template<ReadBarrierOption kReadBarrierOption, class Visitor>
VisitJFieldIDs(Visitor v)203 void ClassExt::VisitJFieldIDs(Visitor v) {
204 ObjPtr<Object> sarr_obj(GetStaticJFieldIDs<kDefaultVerifyFlags, kReadBarrierOption>());
205 if (!sarr_obj.IsNull() && sarr_obj->IsArrayInstance()) {
206 ObjPtr<PointerArray> sarr(down_cast<PointerArray*>(sarr_obj->AsArray().Ptr()));
207 int32_t len = sarr->GetLength();
208 for (int32_t i = 0; i < len; i++) {
209 jfieldID id = sarr->GetElementPtrSize<jfieldID>(i, kRuntimePointerSize);
210 if (id != nullptr) {
211 v(id, i, true);
212 }
213 }
214 }
215 ObjPtr<PointerArray> iarr_obj(GetInstanceJFieldIDs<kDefaultVerifyFlags, kReadBarrierOption>());
216 if (!iarr_obj.IsNull() && iarr_obj->IsArrayInstance()) {
217 ObjPtr<PointerArray> iarr(down_cast<PointerArray*>(iarr_obj->AsArray().Ptr()));
218 int32_t len = iarr->GetLength();
219 for (int32_t i = 0; i < len; i++) {
220 jfieldID id = iarr->GetElementPtrSize<jfieldID>(i, kRuntimePointerSize);
221 if (id != nullptr) {
222 v(id, i, false);
223 }
224 }
225 }
226 }
227
228 } // namespace mirror
229 } // namespace art
230
231 #endif // ART_RUNTIME_MIRROR_CLASS_EXT_INL_H_
232