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https://github.com/openharmony/ark_js_runtime.git
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xiongluo
ae86ac820b
1. Trigger GC before huge space and sparse expanding. 2. Avoid triggering concurrent mark twice. 3. Add unittest to check huge objects can be allocated frequently. Signed-off-by: xiongluo <xiongluo@huawei.com>
128 lines
4.2 KiB
C++
128 lines
4.2 KiB
C++
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ecmascript/mem/space-inl.h"
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#include "ecmascript/ecma_vm.h"
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#include "ecmascript/mem/heap.h"
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#include "ecmascript/mem/heap_region_allocator.h"
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#include "ecmascript/mem/mem_controller.h"
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#include "ecmascript/mem/region-inl.h"
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#include "ecmascript/mem/remembered_set.h"
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namespace panda::ecmascript {
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Space::Space(Heap *heap, MemSpaceType spaceType, size_t initialCapacity, size_t maximumCapacity)
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: heap_(heap),
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vm_(heap_->GetEcmaVM()),
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thread_(vm_->GetJSThread()),
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heapRegionAllocator_(vm_->GetHeapRegionAllocator()),
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spaceType_(spaceType),
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initialCapacity_(initialCapacity),
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maximumCapacity_(maximumCapacity),
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committedSize_(0)
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{
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}
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void Space::Destroy()
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{
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ReclaimRegions();
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}
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void Space::ReclaimRegions()
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{
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EnumerateRegions([this](Region *current) { ClearAndFreeRegion(current); });
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regionList_.Clear();
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committedSize_ = 0;
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}
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void Space::ClearAndFreeRegion(Region *region)
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{
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LOG_ECMA_MEM(DEBUG) << "Clear region from:" << region << " to " << ToSpaceTypeName(spaceType_);
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region->SetSpace(nullptr);
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region->DeleteMarkBitmap();
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region->DeleteCrossRegionRememberedSet();
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region->DeleteOldToNewRememberedSet();
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DecrementCommitted(region->GetCapacity());
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DecrementObjectSize(region->GetSize());
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if (spaceType_ == MemSpaceType::OLD_SPACE || spaceType_ == MemSpaceType::NON_MOVABLE ||
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spaceType_ == MemSpaceType::MACHINE_CODE_SPACE) {
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region->DestroySet();
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}
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heapRegionAllocator_->FreeRegion(region);
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}
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bool Space::ContainObject(TaggedObject *object) const
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{
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Region *region = Region::ObjectAddressToRange(object);
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return region->GetSpace() == this;
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}
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HugeObjectSpace::HugeObjectSpace(Heap *heap, size_t initialCapacity, size_t maximumCapacity)
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: Space(heap, MemSpaceType::HUGE_OBJECT_SPACE, initialCapacity, maximumCapacity)
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{
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}
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uintptr_t HugeObjectSpace::Allocate(size_t objectSize)
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{
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if (committedSize_ >= maximumCapacity_) {
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LOG_ECMA_MEM(INFO) << "Committed size " << committedSize_ << " of huge object space is too big.";
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return 0;
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}
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// Check whether it is necessary to trigger Old GC before expanding or OOM risk.
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heap_->CheckAndTriggerOldGC();
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size_t alignedSize = AlignUp(objectSize + sizeof(Region), PANDA_POOL_ALIGNMENT_IN_BYTES);
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if (UNLIKELY(alignedSize > MAX_HUGE_OBJECT_SIZE)) {
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LOG_ECMA_MEM(FATAL) << "The size is too big for this allocator. Return nullptr.";
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return 0;
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}
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Region *region = heapRegionAllocator_->AllocateAlignedRegion(this, alignedSize);
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region->SetFlag(RegionFlags::IS_HUGE_OBJECT);
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AddRegion(region);
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return region->GetBegin();
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}
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void HugeObjectSpace::Sweeping()
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{
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Region *currentRegion = GetRegionList().GetFirst();
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while (currentRegion != nullptr) {
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Region *next = currentRegion->GetNext();
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auto markBitmap = currentRegion->GetMarkBitmap();
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ASSERT(markBitmap != nullptr);
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bool isMarked = false;
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markBitmap->IterateOverMarkedChunks([&isMarked]([[maybe_unused]] void *mem) { isMarked = true; });
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if (!isMarked) {
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GetRegionList().RemoveNode(currentRegion);
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ClearAndFreeRegion(currentRegion);
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}
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currentRegion = next;
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}
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}
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size_t HugeObjectSpace::GetHeapObjectSize() const
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{
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return committedSize_;
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}
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void HugeObjectSpace::IterateOverObjects(const std::function<void(TaggedObject *object)> &objectVisitor) const
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{
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EnumerateRegions([&](Region *region) {
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uintptr_t curPtr = region->GetBegin();
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objectVisitor(reinterpret_cast<TaggedObject *>(curPtr));
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});
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}
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} // namespace panda::ecmascript
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