1 /*
2 * Copyright (c) 2021-2024 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/snapshot/mem/snapshot_env.h"
17 #include "ecmascript/js_tagged_value-inl.h"
18 #include "ecmascript/global_env.h"
19
20 namespace panda::ecmascript {
21
AddGlobalConstToMap()22 void SnapshotEnv::AddGlobalConstToMap()
23 {
24 auto globalConst = const_cast<GlobalEnvConstants *>(vm_->GetJSThread()->GlobalConstants());
25 for (size_t index = 0; index < globalConst->GetConstantCount(); index++) {
26 JSTaggedValue objectValue = globalConst->GetGlobalConstantObject(index);
27 if (objectValue.IsHeapObject() && !objectValue.IsString()) {
28 rootObjectMap_.emplace(objectValue.GetRawData(), index);
29 }
30 }
31 }
32
RelocateRootObjectAddr(uint32_t index)33 JSTaggedType SnapshotEnv::RelocateRootObjectAddr(uint32_t index)
34 {
35 auto globalConst = const_cast<GlobalEnvConstants *>(vm_->GetJSThread()->GlobalConstants());
36 size_t globalConstCount = globalConst->GetConstantCount();
37 if (index < globalConstCount) {
38 JSTaggedValue obj = globalConst->GetGlobalConstantObject(index);
39 if (obj.IsUndefined()) {
40 LOG_ECMA(FATAL) << "Relocate GlobalConstants Root undefined, index: " << index;
41 }
42 return obj.GetRawData();
43 }
44 JSHandle<JSTaggedValue> value = vm_->GetGlobalEnv()->GetNoLazyEnvObjectByIndex(index - globalConstCount);
45 if (value->IsUndefined()) {
46 LOG_ECMA(FATAL) << "Relocate GlobalEnv Root undefined, index: " << index
47 << ", globalConstCount:" << globalConstCount;
48 }
49 return value->GetRawData();
50 }
51
Iterate(RootVisitor & v,VMRootVisitType type)52 void SnapshotEnv::Iterate(RootVisitor &v, VMRootVisitType type)
53 {
54 if (type == VMRootVisitType::UPDATE_ROOT) {
55 // during update root, rootObjectMap_ key need update
56 std::unordered_map<JSTaggedType, uint32_t> rootObjectMap(rootObjectMap_.size());
57 for (auto &it : rootObjectMap_) {
58 auto objectAddr = it.first;
59 ObjectSlot slot(reinterpret_cast<uintptr_t>(&objectAddr));
60 v.VisitRoot(Root::ROOT_VM, slot);
61 rootObjectMap.emplace(slot.GetTaggedType(), it.second);
62 }
63 std::swap(rootObjectMap_, rootObjectMap);
64 rootObjectMap.clear();
65 } else {
66 for (auto &it : rootObjectMap_) {
67 ObjectSlot slot(reinterpret_cast<uintptr_t>(&it));
68 v.VisitRoot(Root::ROOT_VM, slot);
69 }
70 }
71 }
72 } // namespace panda::ecmascript
73
74