mirror of
https://github.com/openharmony/ark_js_runtime.git
synced 2026-08-27 10:41:15 -04:00
dingwen
f55d1a781f
Description:Before serializing, cache all global const and builtins objects in a map. When serialzing object taggged field, firstly searching the field object in the map, if exist, record the index. Then when deserializing, we can quickly find the object by index. ISSUE:https://gitee.com/openharmony/ark_js_runtime/issues/I5CA56 Signed-off-by: dingwen <dingwen6@huawei.com> Change-Id: I935cc445d50a1e5854b88a7d01445aaa87da2cbc
91 lines
3.3 KiB
C++
91 lines
3.3 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/snapshot/mem/snapshot_env.h"
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#include "ecmascript/ecma_vm.h"
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#include "ecmascript/global_env.h"
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namespace panda::ecmascript {
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void SnapshotEnv::Initialize()
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{
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#if ECMASCRIPT_ENABLE_SNAPSHOT
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InitGlobalConst();
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InitGlobalEnv();
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#endif
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}
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void SnapshotEnv::InitGlobalConst()
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{
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auto globalConst = const_cast<GlobalEnvConstants *>(vm_->GetJSThread()->GlobalConstants());
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size_t constantCount = globalConst->GetConstantCount();
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for (size_t index = 0; index < constantCount; index++) {
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JSTaggedValue objectValue = globalConst->GetGlobalConstantObject(index);
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if (objectValue.IsHeapObject() && !objectValue.IsString()) {
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TaggedObject *object = objectValue.GetTaggedObject();
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object->GetClass()->SetGlobalConstOrBuiltinsObject(true);
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objectVector_.emplace_back(ToUintPtr(object));
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}
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}
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}
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void SnapshotEnv::InitGlobalEnv()
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{
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auto globalEnv = vm_->GetGlobalEnv();
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CQueue<TaggedObject *> objectQueue;
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std::set<TaggedObject *> objectSet;
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objectQueue.emplace(*globalEnv);
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objectSet.emplace(*globalEnv);
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while (!objectQueue.empty()) {
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auto taggedObject = objectQueue.front();
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if (taggedObject == nullptr) {
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break;
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}
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taggedObject->GetClass()->SetGlobalConstOrBuiltinsObject(true);
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objectVector_.emplace_back(ToUintPtr(taggedObject));
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objectQueue.pop();
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HandleObjectField(taggedObject, &objectQueue, &objectSet);
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}
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}
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void SnapshotEnv::HandleObjectField(TaggedObject *objectHeader, CQueue<TaggedObject *> *objectQueue,
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std::set<TaggedObject *> *objectSet)
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{
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auto visitor = [objectQueue, objectSet]([[maybe_unused]]TaggedObject *root, ObjectSlot start, ObjectSlot end,
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[[maybe_unused]]bool isNative) {
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for (ObjectSlot slot = start; slot < end; slot++) {
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auto fieldAddr = reinterpret_cast<JSTaggedType *>(slot.SlotAddress());
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JSTaggedValue fieldValue(*fieldAddr);
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if (fieldValue.IsHeapObject() && !fieldValue.IsWeak() && !fieldValue.IsString()
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&& objectSet->find(fieldValue.GetTaggedObject()) == objectSet->end()) {
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auto object = fieldValue.GetTaggedObject();
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objectQueue->emplace(object);
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objectSet->emplace(object);
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}
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}
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};
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objXRay_.VisitObjectBody<VisitType::OLD_GC_VISIT>(objectHeader, objectHeader->GetClass(), visitor);
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}
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void SnapshotEnv::Iterate(const RootVisitor &v)
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{
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uint64_t length = objectVector_.size();
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for (uint64_t i = 0; i < length; i++) {
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v(Root::ROOT_VM, ObjectSlot(reinterpret_cast<uintptr_t>(&(objectVector_.data()[i]))));
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}
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}
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} // namespace panda::ecmascript
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