1 /**
2 * Copyright (c) 2023-2024 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 #ifndef PANDA_RUNTIME_MEM_GC_G1_CARD_HANDLER_H
16 #define PANDA_RUNTIME_MEM_GC_G1_CARD_HANDLER_H
17
18 #include "runtime/include/object_header.h"
19 #include "runtime/mem/gc/card_table.h"
20 #include "runtime/mem/gc/gc_barrier_set.h"
21 #include "runtime/mem/rem_set-inl.h"
22 #include "runtime/mem/gc/g1/g1-object-pointer-handlers.h"
23 #include "runtime/mem/object-references-iterator-inl.h"
24
25 namespace ark::mem {
26 class Region;
27
28 template <typename LanguageConfig>
29 class CardHandler {
30 public:
CardHandler(CardTable * cardTable,size_t regionSizeBits,const std::atomic_bool & deferCards)31 explicit CardHandler(CardTable *cardTable, size_t regionSizeBits, const std::atomic_bool &deferCards)
32 : cardTable_(cardTable), regionSizeBits_(regionSizeBits), deferCards_(deferCards)
33 {
34 }
35
36 bool Handle(CardTable::CardPtr cardPtr);
37
38 private:
39 CardTable *cardTable_;
40 size_t regionSizeBits_;
41 const std::atomic_bool &deferCards_;
42 };
43
44 template <typename LanguageConfig>
45 class RegionRemsetBuilder {
46 public:
RegionRemsetBuilder(Region * fromRegion,void * startAddress,void * endAddress,size_t regionSizeBits,const std::atomic_bool & deferCards,bool * result)47 RegionRemsetBuilder(Region *fromRegion, void *startAddress, void *endAddress, size_t regionSizeBits,
48 const std::atomic_bool &deferCards, bool *result)
49 : objectPointerHandler_(fromRegion, regionSizeBits, deferCards),
50 startAddress_(startAddress),
51 endAddress_(endAddress),
52 result_(result)
53 {
54 }
55
operator()56 bool operator()(void *mem) const
57 {
58 auto *obj = static_cast<ObjectHeader *>(mem);
59 if (obj->ClassAddr<BaseClass>() != nullptr) {
60 // Class may be null when we are visiting a card and at the same time a new non-movable
61 // object is allocated in the memory region covered by the card.
62 *result_ = ObjectIterator<LanguageConfig::LANG_TYPE>::template Iterate<true>(obj, &objectPointerHandler_,
63 startAddress_, endAddress_);
64 return *result_;
65 }
66 return true;
67 }
68
69 private:
70 RemsetObjectPointerHandler objectPointerHandler_;
71 void *startAddress_;
72 void *endAddress_;
73 bool *result_;
74 };
75
76 template <typename LanguageConfig>
Handle(CardTable::CardPtr cardPtr)77 bool CardHandler<LanguageConfig>::Handle(CardTable::CardPtr cardPtr)
78 {
79 bool result = true;
80 auto *startAddress = ToVoidPtr(cardTable_->GetCardStartAddress(cardPtr));
81 LOG(DEBUG, GC) << "HandleCard card: " << cardTable_->GetMemoryRange(cardPtr);
82 ASSERT_PRINT(IsHeapSpace(PoolManager::GetMmapMemPool()->GetSpaceTypeForAddr(startAddress)),
83 "Invalid space type for the " << startAddress);
84 auto *region = AddrToRegion(startAddress);
85 ASSERT(region != nullptr);
86 ASSERT_PRINT(region->GetLiveBitmap() != nullptr, "Region " << region << " GetLiveBitmap() == nullptr");
87 auto *endAddress = ToVoidPtr(cardTable_->GetCardEndAddress(cardPtr));
88 RegionRemsetBuilder<LanguageConfig> remsetBuilder(region, startAddress, endAddress, regionSizeBits_, deferCards_,
89 &result);
90 if (region->HasFlag(RegionFlag::IS_LARGE_OBJECT)) {
91 region->GetLiveBitmap()->CallForMarkedChunkInHumongousRegion<true>(ToVoidPtr(region->Begin()), remsetBuilder);
92 } else {
93 region->GetLiveBitmap()->IterateOverMarkedChunkInRangeInterruptible<true>(startAddress, endAddress,
94 remsetBuilder);
95 }
96 return result;
97 }
98 } // namespace ark::mem
99
100 #endif
101