1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef ECMASCRIPT_MEM_BARRIERS_H 17 #define ECMASCRIPT_MEM_BARRIERS_H 18 19 #include "ecmascript/common.h" 20 #include "ecmascript/js_tagged_value.h" 21 #include "ecmascript/mem/mark_word.h" 22 #include "ecmascript/mem/mem_common.h" 23 24 namespace panda::ecmascript { 25 class Region; 26 27 enum class WriteBarrierType : size_t { NORMAL, DESERIALIZE }; 28 29 class Barriers { 30 public: 31 template<class T> SetPrimitive(void * obj,size_t offset,T value)32 static inline void SetPrimitive(void *obj, size_t offset, T value) 33 { 34 auto *addr = reinterpret_cast<T *>(ToUintPtr(obj) + offset); 35 // NOLINTNEXTLINE(clang-analyzer-core.NullDereference) 36 *addr = value; 37 } 38 39 template<class T> AtomicSetPrimitive(volatile void * obj,size_t offset,T oldValue,T value)40 static inline T AtomicSetPrimitive(volatile void *obj, size_t offset, T oldValue, T value) 41 { 42 volatile auto atomicField = reinterpret_cast<volatile std::atomic<T> *>(ToUintPtr(obj) + offset); 43 std::atomic_compare_exchange_strong_explicit(atomicField, &oldValue, value, std::memory_order_release, 44 std::memory_order_relaxed); 45 return oldValue; 46 } 47 48 template<bool needWriteBarrier = true> 49 static void SetObject(const JSThread *thread, void *obj, size_t offset, JSTaggedType value); 50 51 static void SynchronizedSetClass(const JSThread *thread, void *obj, JSTaggedType value); 52 static void SynchronizedSetObject(const JSThread *thread, void *obj, size_t offset, JSTaggedType value, 53 bool isPrimitive = false); 54 55 template<class T> GetValue(const void * obj,size_t offset)56 static inline T GetValue(const void *obj, size_t offset) 57 { 58 auto *addr = reinterpret_cast<T *>(ToUintPtr(obj) + offset); 59 return *addr; 60 } 61 62 static void PUBLIC_API Update(const JSThread *thread, uintptr_t slotAddr, Region *objectRegion, 63 TaggedObject *value, Region *valueRegion, 64 WriteBarrierType writeType = WriteBarrierType::NORMAL); 65 static void PUBLIC_API UpdateWithoutEden(const JSThread *thread, uintptr_t slotAddr, Region *objectRegion, 66 TaggedObject *value, Region *valueRegion, 67 WriteBarrierType writeType = WriteBarrierType::NORMAL); 68 69 static void PUBLIC_API UpdateShared(const JSThread *thread, TaggedObject *value, Region *valueRegion); 70 }; 71 } // namespace panda::ecmascript 72 73 #endif // ECMASCRIPT_MEM_BARRIERS_H 74