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 #include "ecmascript/mem/chunk.h" 17 18 #include "ecmascript/mem/heap.h" 19 20 namespace panda::ecmascript { Chunk(NativeAreaAllocator * allocator)21Chunk::Chunk(NativeAreaAllocator *allocator) : allocator_(allocator) {} 22 NewArea(size_t size)23Area *Chunk::NewArea(size_t size) 24 { 25 auto area = allocator_->AllocateArea(size); 26 if (area == nullptr) { 27 LOG_ECMA_MEM(FATAL) << "OOM Chunk : NewArea area is nullptr"; 28 UNREACHABLE(); 29 } 30 areaList_.AddNode(area); 31 currentArea_ = area; 32 return area; 33 } 34 Expand(size_t size)35uintptr_t Chunk::Expand(size_t size) 36 { 37 ASSERT(end_ - ptr_ < size); 38 39 Area *head = currentArea_; 40 size_t newSize; 41 if (head != nullptr) { 42 // NOLINTNEXTLINE(hicpp-signed-bitwise) 43 newSize = size + (head->GetSize() << 1); 44 } else { 45 newSize = sizeof(Area) + MEM_ALIGN + size; 46 } 47 48 if (newSize < MIN_CHUNK_AREA_SIZE) { 49 newSize = MIN_CHUNK_AREA_SIZE; 50 } else if (newSize > MAX_CHUNK_AREA_SIZE) { 51 size_t minNewSize = sizeof(Area) + MEM_ALIGN + size; 52 newSize = std::max(minNewSize, MAX_CHUNK_AREA_SIZE); 53 } 54 55 if (newSize > static_cast<size_t>(std::numeric_limits<int>::max())) { 56 LOG_ECMA_MEM(FATAL) << "OOM chunk : newSize is "<< newSize << ", size is " << size; 57 UNREACHABLE(); 58 } 59 60 Area *area = NewArea(newSize); 61 if (area == nullptr) { 62 LOG_ECMA_MEM(FATAL) << "OOM chunk : NewArea area is nullptr"; 63 UNREACHABLE(); 64 } 65 uintptr_t result = AlignUp(area->GetBegin(), MEM_ALIGN); 66 ptr_ = result + size; 67 end_ = area->GetEnd(); 68 return result; 69 } 70 ReleaseMemory()71void Chunk::ReleaseMemory() 72 { 73 while (!areaList_.IsEmpty()) { 74 Area *node = areaList_.PopBack(); 75 allocator_->FreeArea(node); 76 } 77 ptr_ = 0; 78 end_ = 0; 79 } 80 } // namespace panda::ecmascript 81