| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ART_RUNTIME_CLASS_LINKER_INL_H_ |
| #define ART_RUNTIME_CLASS_LINKER_INL_H_ |
| |
| #include "class_linker.h" |
| #include "gc/heap-inl.h" |
| #include "mirror/art_field.h" |
| #include "mirror/class_loader.h" |
| #include "mirror/dex_cache-inl.h" |
| #include "mirror/iftable.h" |
| #include "mirror/object_array.h" |
| #include "object_utils.h" |
| #include "handle_scope-inl.h" |
| |
| namespace art { |
| |
| inline bool ClassLinker::IsInBootClassPath(const char* descriptor) { |
| DexFile::ClassPathEntry pair = DexFile::FindInClassPath(descriptor, boot_class_path_); |
| return pair.second != nullptr; |
| } |
| |
| inline mirror::Class* ClassLinker::FindSystemClass(Thread* self, const char* descriptor) { |
| return FindClass(self, descriptor, NullHandle<mirror::ClassLoader>()); |
| } |
| |
| inline mirror::Class* ClassLinker::FindArrayClass(Thread* self, mirror::Class** element_class) { |
| for (size_t i = 0; i < kFindArrayCacheSize; ++i) { |
| // Read the cached array class once to avoid races with other threads setting it. |
| mirror::Class* array_class = ReadBarrier::BarrierForRoot<mirror::Class, kWithReadBarrier>( |
| &find_array_class_cache_[i]); |
| if (array_class != nullptr && array_class->GetComponentType() == *element_class) { |
| return array_class; |
| } |
| } |
| DCHECK(!(*element_class)->IsPrimitiveVoid()); |
| std::string descriptor = "[" + (*element_class)->GetDescriptor(); |
| StackHandleScope<2> hs(Thread::Current()); |
| Handle<mirror::ClassLoader> class_loader(hs.NewHandle((*element_class)->GetClassLoader())); |
| HandleWrapper<mirror::Class> h_element_class(hs.NewHandleWrapper(element_class)); |
| mirror::Class* array_class = FindClass(self, descriptor.c_str(), class_loader); |
| // Benign races in storing array class and incrementing index. |
| size_t victim_index = find_array_class_cache_next_victim_; |
| find_array_class_cache_[victim_index] = array_class; |
| find_array_class_cache_next_victim_ = (victim_index + 1) % kFindArrayCacheSize; |
| return array_class; |
| } |
| |
| inline mirror::String* ClassLinker::ResolveString(uint32_t string_idx, |
| mirror::ArtMethod* referrer) { |
| mirror::String* resolved_string = referrer->GetDexCacheStrings()->Get(string_idx); |
| if (UNLIKELY(resolved_string == NULL)) { |
| mirror::Class* declaring_class = referrer->GetDeclaringClass(); |
| StackHandleScope<1> hs(Thread::Current()); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(declaring_class->GetDexCache())); |
| const DexFile& dex_file = *dex_cache->GetDexFile(); |
| resolved_string = ResolveString(dex_file, string_idx, dex_cache); |
| if (resolved_string != nullptr) { |
| DCHECK_EQ(dex_cache->GetResolvedString(string_idx), resolved_string); |
| } |
| } |
| return resolved_string; |
| } |
| |
| inline mirror::Class* ClassLinker::ResolveType(uint16_t type_idx, |
| mirror::ArtMethod* referrer) { |
| mirror::Class* resolved_type = referrer->GetDexCacheResolvedTypes()->Get(type_idx); |
| if (UNLIKELY(resolved_type == nullptr)) { |
| mirror::Class* declaring_class = referrer->GetDeclaringClass(); |
| StackHandleScope<2> hs(Thread::Current()); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(declaring_class->GetDexCache())); |
| Handle<mirror::ClassLoader> class_loader(hs.NewHandle(declaring_class->GetClassLoader())); |
| const DexFile& dex_file = *dex_cache->GetDexFile(); |
| resolved_type = ResolveType(dex_file, type_idx, dex_cache, class_loader); |
| if (resolved_type != nullptr) { |
| DCHECK_EQ(dex_cache->GetResolvedType(type_idx), resolved_type); |
| } |
| } |
| return resolved_type; |
| } |
| |
| inline mirror::Class* ClassLinker::ResolveType(uint16_t type_idx, mirror::ArtField* referrer) { |
| mirror::Class* declaring_class = referrer->GetDeclaringClass(); |
| mirror::DexCache* dex_cache_ptr = declaring_class->GetDexCache(); |
| mirror::Class* resolved_type = dex_cache_ptr->GetResolvedType(type_idx); |
| if (UNLIKELY(resolved_type == NULL)) { |
| StackHandleScope<2> hs(Thread::Current()); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(dex_cache_ptr)); |
| Handle<mirror::ClassLoader> class_loader(hs.NewHandle(declaring_class->GetClassLoader())); |
| const DexFile& dex_file = *dex_cache->GetDexFile(); |
| resolved_type = ResolveType(dex_file, type_idx, dex_cache, class_loader); |
| if (resolved_type != nullptr) { |
| DCHECK_EQ(dex_cache->GetResolvedType(type_idx), resolved_type); |
| } |
| } |
| return resolved_type; |
| } |
| |
| inline mirror::ArtMethod* ClassLinker::GetResolvedMethod(uint32_t method_idx, |
| mirror::ArtMethod* referrer, |
| InvokeType type) { |
| mirror::ArtMethod* resolved_method = |
| referrer->GetDexCacheResolvedMethods()->Get(method_idx); |
| if (resolved_method == nullptr || resolved_method->IsRuntimeMethod()) { |
| return nullptr; |
| } |
| return resolved_method; |
| } |
| |
| inline mirror::ArtMethod* ClassLinker::ResolveMethod(Thread* self, uint32_t method_idx, |
| mirror::ArtMethod** referrer, |
| InvokeType type) { |
| mirror::ArtMethod* resolved_method = GetResolvedMethod(method_idx, *referrer, type); |
| if (LIKELY(resolved_method != nullptr)) { |
| return resolved_method; |
| } |
| mirror::Class* declaring_class = (*referrer)->GetDeclaringClass(); |
| StackHandleScope<3> hs(self); |
| Handle<mirror::DexCache> h_dex_cache(hs.NewHandle(declaring_class->GetDexCache())); |
| Handle<mirror::ClassLoader> h_class_loader(hs.NewHandle(declaring_class->GetClassLoader())); |
| HandleWrapper<mirror::ArtMethod> h_referrer(hs.NewHandleWrapper(referrer)); |
| const DexFile* dex_file = h_dex_cache->GetDexFile(); |
| resolved_method = ResolveMethod(*dex_file, method_idx, h_dex_cache, h_class_loader, h_referrer, |
| type); |
| if (resolved_method != nullptr) { |
| DCHECK_EQ(h_dex_cache->GetResolvedMethod(method_idx), resolved_method); |
| } |
| return resolved_method; |
| } |
| |
| inline mirror::ArtField* ClassLinker::GetResolvedField(uint32_t field_idx, |
| mirror::Class* field_declaring_class) { |
| return field_declaring_class->GetDexCache()->GetResolvedField(field_idx); |
| } |
| |
| inline mirror::ArtField* ClassLinker::ResolveField(uint32_t field_idx, mirror::ArtMethod* referrer, |
| bool is_static) { |
| mirror::Class* declaring_class = referrer->GetDeclaringClass(); |
| mirror::ArtField* resolved_field = GetResolvedField(field_idx, declaring_class); |
| if (UNLIKELY(resolved_field == NULL)) { |
| StackHandleScope<2> hs(Thread::Current()); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(declaring_class->GetDexCache())); |
| Handle<mirror::ClassLoader> class_loader(hs.NewHandle(declaring_class->GetClassLoader())); |
| const DexFile& dex_file = *dex_cache->GetDexFile(); |
| resolved_field = ResolveField(dex_file, field_idx, dex_cache, class_loader, is_static); |
| if (resolved_field != nullptr) { |
| DCHECK_EQ(dex_cache->GetResolvedField(field_idx), resolved_field); |
| } |
| } |
| return resolved_field; |
| } |
| |
| template <class T> |
| inline mirror::ObjectArray<T>* ClassLinker::AllocObjectArray(Thread* self, size_t length) { |
| return mirror::ObjectArray<T>::Alloc(self, GetClassRoot(kObjectArrayClass), length); |
| } |
| |
| inline mirror::ObjectArray<mirror::Class>* ClassLinker::AllocClassArray(Thread* self, |
| size_t length) { |
| return mirror::ObjectArray<mirror::Class>::Alloc(self, GetClassRoot(kClassArrayClass), length); |
| } |
| |
| inline mirror::ObjectArray<mirror::String>* ClassLinker::AllocStringArray(Thread* self, |
| size_t length) { |
| return mirror::ObjectArray<mirror::String>::Alloc(self, GetClassRoot(kJavaLangStringArrayClass), |
| length); |
| } |
| |
| inline mirror::ObjectArray<mirror::ArtMethod>* ClassLinker::AllocArtMethodArray(Thread* self, |
| size_t length) { |
| return mirror::ObjectArray<mirror::ArtMethod>::Alloc(self, |
| GetClassRoot(kJavaLangReflectArtMethodArrayClass), length); |
| } |
| |
| inline mirror::IfTable* ClassLinker::AllocIfTable(Thread* self, size_t ifcount) { |
| return down_cast<mirror::IfTable*>( |
| mirror::IfTable::Alloc(self, GetClassRoot(kObjectArrayClass), |
| ifcount * mirror::IfTable::kMax)); |
| } |
| |
| inline mirror::ObjectArray<mirror::ArtField>* ClassLinker::AllocArtFieldArray(Thread* self, |
| size_t length) { |
| gc::Heap* const heap = Runtime::Current()->GetHeap(); |
| // Can't have movable field arrays for mark compact since we need these arrays to always be valid |
| // so that we can do Object::VisitReferences in the case where the fields don't fit in the |
| // reference offsets word. |
| return mirror::ObjectArray<mirror::ArtField>::Alloc( |
| self, GetClassRoot(kJavaLangReflectArtFieldArrayClass), length, |
| kMoveFieldArrays ? heap->GetCurrentAllocator() : heap->GetCurrentNonMovingAllocator()); |
| } |
| |
| inline mirror::Class* ClassLinker::GetClassRoot(ClassRoot class_root) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| DCHECK(class_roots_ != NULL); |
| mirror::ObjectArray<mirror::Class>* class_roots = |
| ReadBarrier::BarrierForRoot<mirror::ObjectArray<mirror::Class>, kWithReadBarrier>( |
| &class_roots_); |
| mirror::Class* klass = class_roots->Get(class_root); |
| DCHECK(klass != NULL); |
| return klass; |
| } |
| |
| inline mirror::DexCache* ClassLinker::GetDexCache(size_t idx) { |
| dex_lock_.AssertSharedHeld(Thread::Current()); |
| DCHECK(idx < dex_caches_.size()); |
| return ReadBarrier::BarrierForRoot<mirror::DexCache, kWithReadBarrier>(&dex_caches_[idx]); |
| } |
| |
| } // namespace art |
| |
| #endif // ART_RUNTIME_CLASS_LINKER_INL_H_ |