1 /**
2 * Copyright (c) 2025 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 "libpandabase/utils/logger.h"
17 #include "runtime/mark_word.h"
18 #include "runtime/include/runtime.h"
19 #include "runtime/include/panda_vm.h"
20 #include "runtime/mem/gc/cmc-gc-adapter/cmc-gc-adapter.h"
21 #include "objects/ref_field.h"
22 #include "heap/heap_visitor.h"
23
24 namespace ark::mem::ets {
25
VisitVmRoots(const GCRootVisitor & visitor,PandaVM * vm)26 void VisitVmRoots(const GCRootVisitor &visitor, PandaVM *vm)
27 {
28 trace::ScopedTrace scopedTrace(__FUNCTION__);
29 RootManager<EtsLanguageConfig> rootManager(vm);
30 rootManager.VisitNonHeapRoots(visitor, VisitGCRootFlags::ACCESS_ROOT_ALL);
31 vm->VisitStringTable([&visitor](ObjectHeader *str) { visitor(GCRoot(RootType::STRING_TABLE, str)); },
32 VisitGCRootFlags::ACCESS_ROOT_ALL);
33 }
34
UpdateVmRoots(const GCRootUpdater & updater,PandaVM * vm)35 void UpdateVmRoots(const GCRootUpdater &updater, PandaVM *vm)
36 {
37 trace::ScopedTrace scopedTrace(__FUNCTION__);
38 RootManager<EtsLanguageConfig> rootManager(vm);
39 rootManager.UpdateRefsToMovedObjects(updater);
40 }
41
42 } // namespace ark::mem::ets
43
44 namespace panda {
45
GetPandaVM()46 static ark::PandaVM *GetPandaVM()
47 {
48 auto *runtime = ark::Runtime::GetCurrent();
49 if (runtime == nullptr) {
50 return nullptr;
51 }
52 return runtime->GetPandaVM();
53 }
54
VisitStaticRoots(const RefFieldVisitor & visitor)55 void VisitStaticRoots(const RefFieldVisitor &visitor)
56 {
57 ark::PandaVM *vm = GetPandaVM();
58 if (vm == nullptr) {
59 return;
60 }
61
62 ark::GCRootVisitor rootVisitor = [&visitor](const ark::mem::GCRoot &gcRoot) {
63 panda::RefField<> refField {reinterpret_cast<panda::BaseObject *>(gcRoot.GetObjectHeader())};
64 visitor(refField);
65 };
66 ark::mem::ets::VisitVmRoots(rootVisitor, vm);
67 }
68
UpdateStaticRoots(const RefFieldVisitor & visitor)69 void UpdateStaticRoots(const RefFieldVisitor &visitor)
70 {
71 ark::PandaVM *vm = GetPandaVM();
72 if (vm == nullptr) {
73 return;
74 }
75
76 ark::GCRootUpdater rootUpdater = [&visitor](ark::ObjectHeader **object) {
77 ark::ObjectHeader *prev = *object;
78 visitor(reinterpret_cast<RefField<> &>(*reinterpret_cast<BaseObject **>(object)));
79 return prev != *object;
80 };
81 ark::mem::ets::UpdateVmRoots(rootUpdater, vm);
82 }
83
SweepStaticRoots(const WeakRefFieldVisitor & visitor)84 void SweepStaticRoots(const WeakRefFieldVisitor &visitor)
85 {
86 ark::PandaVM *vm = GetPandaVM();
87 if (vm == nullptr) {
88 return;
89 }
90 vm->SweepVmRefs([&visitor](ark::ObjectHeader *object) -> ark::ObjectStatus {
91 // Provide the reference to a local variable.
92 // The object must be forwarded during UpdateStaticRoots.
93 // Here we need to know is the object alive or not.
94 bool alive = visitor(reinterpret_cast<RefField<> &>(*reinterpret_cast<BaseObject **>(&object)));
95 return alive ? ark::ObjectStatus::ALIVE_OBJECT : ark::ObjectStatus::DEAD_OBJECT;
96 });
97 }
98
99 } // namespace panda
100