| /* |
| * Copyright (C) 2015 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_TABLE_INL_H_ |
| #define ART_RUNTIME_CLASS_TABLE_INL_H_ |
| |
| #include "class_table.h" |
| |
| #include "gc_root-inl.h" |
| #include "oat_file.h" |
| |
| namespace art { |
| |
| template<class Visitor> |
| void ClassTable::VisitRoots(Visitor& visitor) { |
| ReaderMutexLock mu(Thread::Current(), lock_); |
| for (ClassSet& class_set : classes_) { |
| for (TableSlot& table_slot : class_set) { |
| table_slot.VisitRoot(visitor); |
| } |
| } |
| for (GcRoot<mirror::Object>& root : strong_roots_) { |
| visitor.VisitRoot(root.AddressWithoutBarrier()); |
| } |
| for (const OatFile* oat_file : oat_files_) { |
| for (GcRoot<mirror::Object>& root : oat_file->GetBssGcRoots()) { |
| visitor.VisitRootIfNonNull(root.AddressWithoutBarrier()); |
| } |
| } |
| } |
| |
| template<class Visitor> |
| void ClassTable::VisitRoots(const Visitor& visitor) { |
| ReaderMutexLock mu(Thread::Current(), lock_); |
| for (ClassSet& class_set : classes_) { |
| for (TableSlot& table_slot : class_set) { |
| table_slot.VisitRoot(visitor); |
| } |
| } |
| for (GcRoot<mirror::Object>& root : strong_roots_) { |
| visitor.VisitRoot(root.AddressWithoutBarrier()); |
| } |
| for (const OatFile* oat_file : oat_files_) { |
| for (GcRoot<mirror::Object>& root : oat_file->GetBssGcRoots()) { |
| visitor.VisitRootIfNonNull(root.AddressWithoutBarrier()); |
| } |
| } |
| } |
| |
| template <typename Visitor, ReadBarrierOption kReadBarrierOption> |
| bool ClassTable::Visit(Visitor& visitor) { |
| ReaderMutexLock mu(Thread::Current(), lock_); |
| for (ClassSet& class_set : classes_) { |
| for (TableSlot& table_slot : class_set) { |
| if (!visitor(table_slot.Read<kReadBarrierOption>())) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| template <typename Visitor, ReadBarrierOption kReadBarrierOption> |
| bool ClassTable::Visit(const Visitor& visitor) { |
| ReaderMutexLock mu(Thread::Current(), lock_); |
| for (ClassSet& class_set : classes_) { |
| for (TableSlot& table_slot : class_set) { |
| if (!visitor(table_slot.Read<kReadBarrierOption>())) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| template<ReadBarrierOption kReadBarrierOption> |
| inline mirror::Class* ClassTable::TableSlot::Read() const { |
| const uint32_t before = data_.load(std::memory_order_relaxed); |
| ObjPtr<mirror::Class> const before_ptr(ExtractPtr(before)); |
| ObjPtr<mirror::Class> const after_ptr( |
| GcRoot<mirror::Class>(before_ptr).Read<kReadBarrierOption>()); |
| if (kReadBarrierOption != kWithoutReadBarrier && before_ptr != after_ptr) { |
| // If another thread raced and updated the reference, do not store the read barrier updated |
| // one. |
| data_.CompareAndSetStrongRelease(before, Encode(after_ptr, MaskHash(before))); |
| } |
| return after_ptr.Ptr(); |
| } |
| |
| template<typename Visitor> |
| inline void ClassTable::TableSlot::VisitRoot(const Visitor& visitor) const { |
| const uint32_t before = data_.load(std::memory_order_relaxed); |
| ObjPtr<mirror::Class> before_ptr(ExtractPtr(before)); |
| GcRoot<mirror::Class> root(before_ptr); |
| visitor.VisitRoot(root.AddressWithoutBarrier()); |
| ObjPtr<mirror::Class> after_ptr(root.Read<kWithoutReadBarrier>()); |
| if (before_ptr != after_ptr) { |
| // If another thread raced and updated the reference, do not store the read barrier updated |
| // one. |
| data_.CompareAndSetStrongRelease(before, Encode(after_ptr, MaskHash(before))); |
| } |
| } |
| |
| inline ObjPtr<mirror::Class> ClassTable::TableSlot::ExtractPtr(uint32_t data) { |
| return reinterpret_cast<mirror::Class*>(data & ~kHashMask); |
| } |
| |
| inline uint32_t ClassTable::TableSlot::Encode(ObjPtr<mirror::Class> klass, uint32_t hash_bits) { |
| DCHECK_LE(hash_bits, kHashMask); |
| return reinterpret_cast<uintptr_t>(klass.Ptr()) | hash_bits; |
| } |
| |
| inline ClassTable::TableSlot::TableSlot(ObjPtr<mirror::Class> klass, uint32_t descriptor_hash) |
| : data_(Encode(klass, MaskHash(descriptor_hash))) { |
| if (kIsDebugBuild) { |
| std::string temp; |
| const uint32_t hash = ComputeModifiedUtf8Hash(klass->GetDescriptor(&temp)); |
| CHECK_EQ(descriptor_hash, hash); |
| } |
| } |
| |
| template <typename Filter> |
| inline void ClassTable::RemoveStrongRoots(const Filter& filter) { |
| WriterMutexLock mu(Thread::Current(), lock_); |
| strong_roots_.erase(std::remove_if(strong_roots_.begin(), strong_roots_.end(), filter), |
| strong_roots_.end()); |
| } |
| |
| } // namespace art |
| |
| #endif // ART_RUNTIME_CLASS_TABLE_INL_H_ |