| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "mod_union_table.h" |
| |
| #include <memory> |
| |
| #include "base/stl_util.h" |
| #include "bitmap-inl.h" |
| #include "card_table-inl.h" |
| #include "gc/accounting/space_bitmap-inl.h" |
| #include "gc/heap.h" |
| #include "gc/space/image_space.h" |
| #include "gc/space/space.h" |
| #include "mirror/object-inl.h" |
| #include "space_bitmap-inl.h" |
| #include "thread-inl.h" |
| |
| namespace art { |
| namespace gc { |
| namespace accounting { |
| |
| class ModUnionAddToCardSetVisitor { |
| public: |
| explicit ModUnionAddToCardSetVisitor(ModUnionTable::CardSet* const cleared_cards) |
| : cleared_cards_(cleared_cards) {} |
| |
| inline void operator()(uint8_t* card, |
| uint8_t expected_value, |
| uint8_t new_value ATTRIBUTE_UNUSED) const { |
| if (expected_value == CardTable::kCardDirty) { |
| cleared_cards_->insert(card); |
| } |
| } |
| |
| private: |
| ModUnionTable::CardSet* const cleared_cards_; |
| }; |
| |
| class ModUnionAddToCardBitmapVisitor { |
| public: |
| ModUnionAddToCardBitmapVisitor(ModUnionTable::CardBitmap* bitmap, CardTable* card_table) |
| : bitmap_(bitmap), card_table_(card_table) {} |
| |
| inline void operator()(uint8_t* card, |
| uint8_t expected_value, |
| uint8_t new_value ATTRIBUTE_UNUSED) const { |
| if (expected_value == CardTable::kCardDirty) { |
| // We want the address the card represents, not the address of the card. |
| bitmap_->Set(reinterpret_cast<uintptr_t>(card_table_->AddrFromCard(card))); |
| } |
| } |
| |
| private: |
| ModUnionTable::CardBitmap* const bitmap_; |
| CardTable* const card_table_; |
| }; |
| |
| class ModUnionAddToCardVectorVisitor { |
| public: |
| explicit ModUnionAddToCardVectorVisitor(std::vector<uint8_t*>* cleared_cards) |
| : cleared_cards_(cleared_cards) { |
| } |
| |
| void operator()(uint8_t* card, uint8_t expected_card, uint8_t new_card ATTRIBUTE_UNUSED) const { |
| if (expected_card == CardTable::kCardDirty) { |
| cleared_cards_->push_back(card); |
| } |
| } |
| |
| private: |
| std::vector<uint8_t*>* const cleared_cards_; |
| }; |
| |
| class ModUnionUpdateObjectReferencesVisitor { |
| public: |
| ModUnionUpdateObjectReferencesVisitor(MarkObjectVisitor* visitor, |
| space::ContinuousSpace* from_space, |
| space::ContinuousSpace* immune_space, |
| bool* contains_reference_to_other_space) |
| : visitor_(visitor), |
| from_space_(from_space), |
| immune_space_(immune_space), |
| contains_reference_to_other_space_(contains_reference_to_other_space) {} |
| |
| // Extra parameters are required since we use this same visitor signature for checking objects. |
| void operator()(mirror::Object* obj, MemberOffset offset, bool is_static ATTRIBUTE_UNUSED) const |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| MarkReference(obj->GetFieldObjectReferenceAddr(offset)); |
| } |
| |
| void VisitRootIfNonNull(mirror::CompressedReference<mirror::Object>* root) const |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| VisitRoot(root); |
| } |
| |
| void VisitRoot(mirror::CompressedReference<mirror::Object>* root) const |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| MarkReference(root); |
| } |
| |
| private: |
| template<bool kPoisonReferences> |
| void MarkReference(mirror::ObjectReference<kPoisonReferences, mirror::Object>* obj_ptr) const |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| // Only add the reference if it is non null and fits our criteria. |
| mirror::Object* ref = obj_ptr->AsMirrorPtr(); |
| if (ref != nullptr && !from_space_->HasAddress(ref) && !immune_space_->HasAddress(ref)) { |
| *contains_reference_to_other_space_ = true; |
| mirror::Object* new_object = visitor_->MarkObject(ref); |
| if (ref != new_object) { |
| obj_ptr->Assign(new_object); |
| } |
| } |
| } |
| |
| MarkObjectVisitor* const visitor_; |
| // Space which we are scanning |
| space::ContinuousSpace* const from_space_; |
| space::ContinuousSpace* const immune_space_; |
| // Set if we have any references to another space. |
| bool* const contains_reference_to_other_space_; |
| }; |
| |
| class ModUnionScanImageRootVisitor { |
| public: |
| // Immune space is any other space which we don't care about references to. Currently this is |
| // the image space in the case of the zygote mod union table. |
| ModUnionScanImageRootVisitor(MarkObjectVisitor* visitor, |
| space::ContinuousSpace* from_space, |
| space::ContinuousSpace* immune_space, |
| bool* contains_reference_to_other_space) |
| : visitor_(visitor), |
| from_space_(from_space), |
| immune_space_(immune_space), |
| contains_reference_to_other_space_(contains_reference_to_other_space) {} |
| |
| void operator()(mirror::Object* root) const |
| REQUIRES(Locks::heap_bitmap_lock_) |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| DCHECK(root != nullptr); |
| ModUnionUpdateObjectReferencesVisitor ref_visitor(visitor_, |
| from_space_, |
| immune_space_, |
| contains_reference_to_other_space_); |
| root->VisitReferences(ref_visitor, VoidFunctor()); |
| } |
| |
| private: |
| MarkObjectVisitor* const visitor_; |
| // Space which we are scanning |
| space::ContinuousSpace* const from_space_; |
| space::ContinuousSpace* const immune_space_; |
| // Set if we have any references to another space. |
| bool* const contains_reference_to_other_space_; |
| }; |
| |
| void ModUnionTableReferenceCache::ClearCards() { |
| CardTable* card_table = GetHeap()->GetCardTable(); |
| ModUnionAddToCardSetVisitor visitor(&cleared_cards_); |
| // Clear dirty cards in the this space and update the corresponding mod-union bits. |
| card_table->ModifyCardsAtomic(space_->Begin(), space_->End(), AgeCardVisitor(), visitor); |
| } |
| |
| void ModUnionTableReferenceCache::ClearTable() { |
| cleared_cards_.clear(); |
| references_.clear(); |
| } |
| |
| class AddToReferenceArrayVisitor { |
| public: |
| AddToReferenceArrayVisitor(ModUnionTableReferenceCache* mod_union_table, |
| MarkObjectVisitor* visitor, |
| std::vector<mirror::HeapReference<mirror::Object>*>* references, |
| bool* has_target_reference) |
| : mod_union_table_(mod_union_table), |
| visitor_(visitor), |
| references_(references), |
| has_target_reference_(has_target_reference) {} |
| |
| // Extra parameters are required since we use this same visitor signature for checking objects. |
| void operator()(mirror::Object* obj, MemberOffset offset, bool is_static ATTRIBUTE_UNUSED) const |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| mirror::HeapReference<mirror::Object>* ref_ptr = obj->GetFieldObjectReferenceAddr(offset); |
| mirror::Object* ref = ref_ptr->AsMirrorPtr(); |
| // Only add the reference if it is non null and fits our criteria. |
| if (ref != nullptr && mod_union_table_->ShouldAddReference(ref)) { |
| // Push the adddress of the reference. |
| references_->push_back(ref_ptr); |
| } |
| } |
| |
| void VisitRootIfNonNull(mirror::CompressedReference<mirror::Object>* root) const |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (!root->IsNull()) { |
| VisitRoot(root); |
| } |
| } |
| |
| void VisitRoot(mirror::CompressedReference<mirror::Object>* root) const |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (mod_union_table_->ShouldAddReference(root->AsMirrorPtr())) { |
| *has_target_reference_ = true; |
| // TODO: Add MarkCompressedReference callback here. |
| mirror::Object* old_ref = root->AsMirrorPtr(); |
| mirror::Object* new_ref = visitor_->MarkObject(old_ref); |
| if (old_ref != new_ref) { |
| root->Assign(new_ref); |
| } |
| } |
| } |
| |
| private: |
| ModUnionTableReferenceCache* const mod_union_table_; |
| MarkObjectVisitor* const visitor_; |
| std::vector<mirror::HeapReference<mirror::Object>*>* const references_; |
| bool* const has_target_reference_; |
| }; |
| |
| class ModUnionReferenceVisitor { |
| public: |
| ModUnionReferenceVisitor(ModUnionTableReferenceCache* const mod_union_table, |
| MarkObjectVisitor* visitor, |
| std::vector<mirror::HeapReference<mirror::Object>*>* references, |
| bool* has_target_reference) |
| : mod_union_table_(mod_union_table), |
| visitor_(visitor), |
| references_(references), |
| has_target_reference_(has_target_reference) {} |
| |
| void operator()(mirror::Object* obj) const |
| REQUIRES_SHARED(Locks::heap_bitmap_lock_, Locks::mutator_lock_) { |
| // We don't have an early exit since we use the visitor pattern, an early |
| // exit should significantly speed this up. |
| AddToReferenceArrayVisitor visitor(mod_union_table_, |
| visitor_, |
| references_, |
| has_target_reference_); |
| obj->VisitReferences(visitor, VoidFunctor()); |
| } |
| |
| private: |
| ModUnionTableReferenceCache* const mod_union_table_; |
| MarkObjectVisitor* const visitor_; |
| std::vector<mirror::HeapReference<mirror::Object>*>* const references_; |
| bool* const has_target_reference_; |
| }; |
| |
| class CheckReferenceVisitor { |
| public: |
| CheckReferenceVisitor(ModUnionTableReferenceCache* mod_union_table, |
| const std::set<mirror::Object*>& references) |
| : mod_union_table_(mod_union_table), |
| references_(references) {} |
| |
| // Extra parameters are required since we use this same visitor signature for checking objects. |
| void operator()(mirror::Object* obj, MemberOffset offset, bool is_static ATTRIBUTE_UNUSED) const |
| REQUIRES_SHARED(Locks::heap_bitmap_lock_, Locks::mutator_lock_) { |
| mirror::Object* ref = obj->GetFieldObject<mirror::Object>(offset); |
| if (ref != nullptr && |
| mod_union_table_->ShouldAddReference(ref) && |
| references_.find(ref) == references_.end()) { |
| Heap* heap = mod_union_table_->GetHeap(); |
| space::ContinuousSpace* from_space = heap->FindContinuousSpaceFromObject(obj, false); |
| space::ContinuousSpace* to_space = heap->FindContinuousSpaceFromObject(ref, false); |
| LOG(INFO) << "Object " << reinterpret_cast<const void*>(obj) << "(" << obj->PrettyTypeOf() |
| << ")" << "References " |
| << reinterpret_cast<const void*>(ref) << "(" << mirror::Object::PrettyTypeOf(ref) |
| << ") without being in mod-union table"; |
| LOG(INFO) << "FromSpace " << from_space->GetName() << " type " |
| << from_space->GetGcRetentionPolicy(); |
| LOG(INFO) << "ToSpace " << to_space->GetName() << " type " |
| << to_space->GetGcRetentionPolicy(); |
| heap->DumpSpaces(LOG_STREAM(INFO)); |
| LOG(FATAL) << "FATAL ERROR"; |
| } |
| } |
| |
| void VisitRootIfNonNull(mirror::CompressedReference<mirror::Object>* root) const |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| if (kIsDebugBuild && !root->IsNull()) { |
| VisitRoot(root); |
| } |
| } |
| |
| void VisitRoot(mirror::CompressedReference<mirror::Object>* root) const |
| REQUIRES_SHARED(Locks::mutator_lock_) { |
| DCHECK(!mod_union_table_->ShouldAddReference(root->AsMirrorPtr())); |
| } |
| |
| private: |
| ModUnionTableReferenceCache* const mod_union_table_; |
| const std::set<mirror::Object*>& references_; |
| }; |
| |
| class ModUnionCheckReferences { |
| public: |
| ModUnionCheckReferences(ModUnionTableReferenceCache* mod_union_table, |
| const std::set<mirror::Object*>& references) |
| REQUIRES(Locks::heap_bitmap_lock_) |
| : mod_union_table_(mod_union_table), references_(references) {} |
| |
| void operator()(mirror::Object* obj) const NO_THREAD_SAFETY_ANALYSIS { |
| Locks::heap_bitmap_lock_->AssertSharedHeld(Thread::Current()); |
| CheckReferenceVisitor visitor(mod_union_table_, references_); |
| obj->VisitReferences(visitor, VoidFunctor()); |
| } |
| |
| private: |
| ModUnionTableReferenceCache* const mod_union_table_; |
| const std::set<mirror::Object*>& references_; |
| }; |
| |
| class EmptyMarkObjectVisitor : public MarkObjectVisitor { |
| public: |
| mirror::Object* MarkObject(mirror::Object* obj) OVERRIDE {return obj;} |
| void MarkHeapReference(mirror::HeapReference<mirror::Object>*) OVERRIDE {} |
| }; |
| |
| void ModUnionTable::FilterCards() { |
| EmptyMarkObjectVisitor visitor; |
| // Use empty visitor since filtering is automatically done by UpdateAndMarkReferences. |
| UpdateAndMarkReferences(&visitor); |
| } |
| |
| void ModUnionTableReferenceCache::Verify() { |
| // Start by checking that everything in the mod union table is marked. |
| for (const auto& ref_pair : references_) { |
| for (mirror::HeapReference<mirror::Object>* ref : ref_pair.second) { |
| CHECK(heap_->IsLiveObjectLocked(ref->AsMirrorPtr())); |
| } |
| } |
| |
| // Check the references of each clean card which is also in the mod union table. |
| CardTable* card_table = heap_->GetCardTable(); |
| ContinuousSpaceBitmap* live_bitmap = space_->GetLiveBitmap(); |
| for (const auto& ref_pair : references_) { |
| const uint8_t* card = ref_pair.first; |
| if (*card == CardTable::kCardClean) { |
| std::set<mirror::Object*> reference_set; |
| for (mirror::HeapReference<mirror::Object>* obj_ptr : ref_pair.second) { |
| reference_set.insert(obj_ptr->AsMirrorPtr()); |
| } |
| ModUnionCheckReferences visitor(this, reference_set); |
| uintptr_t start = reinterpret_cast<uintptr_t>(card_table->AddrFromCard(card)); |
| live_bitmap->VisitMarkedRange(start, start + CardTable::kCardSize, visitor); |
| } |
| } |
| } |
| |
| void ModUnionTableReferenceCache::Dump(std::ostream& os) { |
| CardTable* card_table = heap_->GetCardTable(); |
| os << "ModUnionTable cleared cards: ["; |
| for (uint8_t* card_addr : cleared_cards_) { |
| uintptr_t start = reinterpret_cast<uintptr_t>(card_table->AddrFromCard(card_addr)); |
| uintptr_t end = start + CardTable::kCardSize; |
| os << reinterpret_cast<void*>(start) << "-" << reinterpret_cast<void*>(end) << ","; |
| } |
| os << "]\nModUnionTable references: ["; |
| for (const auto& ref_pair : references_) { |
| const uint8_t* card_addr = ref_pair.first; |
| uintptr_t start = reinterpret_cast<uintptr_t>(card_table->AddrFromCard(card_addr)); |
| uintptr_t end = start + CardTable::kCardSize; |
| os << reinterpret_cast<void*>(start) << "-" << reinterpret_cast<void*>(end) << "->{"; |
| for (mirror::HeapReference<mirror::Object>* ref : ref_pair.second) { |
| os << reinterpret_cast<const void*>(ref->AsMirrorPtr()) << ","; |
| } |
| os << "},"; |
| } |
| } |
| |
| void ModUnionTableReferenceCache::VisitObjects(ObjectCallback* callback, void* arg) { |
| CardTable* const card_table = heap_->GetCardTable(); |
| ContinuousSpaceBitmap* live_bitmap = space_->GetLiveBitmap(); |
| for (uint8_t* card : cleared_cards_) { |
| uintptr_t start = reinterpret_cast<uintptr_t>(card_table->AddrFromCard(card)); |
| uintptr_t end = start + CardTable::kCardSize; |
| live_bitmap->VisitMarkedRange(start, |
| end, |
| [this, callback, arg](mirror::Object* obj) { |
| callback(obj, arg); |
| }); |
| } |
| // This may visit the same card twice, TODO avoid this. |
| for (const auto& pair : references_) { |
| const uint8_t* card = pair.first; |
| uintptr_t start = reinterpret_cast<uintptr_t>(card_table->AddrFromCard(card)); |
| uintptr_t end = start + CardTable::kCardSize; |
| live_bitmap->VisitMarkedRange(start, |
| end, |
| [this, callback, arg](mirror::Object* obj) { |
| callback(obj, arg); |
| }); |
| } |
| } |
| |
| void ModUnionTableReferenceCache::UpdateAndMarkReferences(MarkObjectVisitor* visitor) { |
| CardTable* const card_table = heap_->GetCardTable(); |
| std::vector<mirror::HeapReference<mirror::Object>*> cards_references; |
| // If has_target_reference is true then there was a GcRoot compressed reference which wasn't |
| // added. In this case we need to keep the card dirty. |
| // We don't know if the GcRoot addresses will remain constant, for example, classloaders have a |
| // hash set of GcRoot which may be resized or modified. |
| bool has_target_reference; |
| ModUnionReferenceVisitor add_visitor(this, visitor, &cards_references, &has_target_reference); |
| CardSet new_cleared_cards; |
| for (uint8_t* card : cleared_cards_) { |
| // Clear and re-compute alloc space references associated with this card. |
| cards_references.clear(); |
| has_target_reference = false; |
| uintptr_t start = reinterpret_cast<uintptr_t>(card_table->AddrFromCard(card)); |
| uintptr_t end = start + CardTable::kCardSize; |
| space::ContinuousSpace* space = |
| heap_->FindContinuousSpaceFromObject(reinterpret_cast<mirror::Object*>(start), false); |
| DCHECK(space != nullptr); |
| ContinuousSpaceBitmap* live_bitmap = space->GetLiveBitmap(); |
| live_bitmap->VisitMarkedRange(start, end, add_visitor); |
| // Update the corresponding references for the card. |
| auto found = references_.find(card); |
| if (found == references_.end()) { |
| // Don't add card for an empty reference array. |
| if (!cards_references.empty()) { |
| references_.Put(card, cards_references); |
| } |
| } else { |
| if (cards_references.empty()) { |
| references_.erase(found); |
| } else { |
| found->second = cards_references; |
| } |
| } |
| if (has_target_reference) { |
| // Keep this card for next time since it contains a GcRoot which matches the |
| // ShouldAddReference criteria. This usually occurs for class loaders. |
| new_cleared_cards.insert(card); |
| } |
| } |
| cleared_cards_ = std::move(new_cleared_cards); |
| size_t count = 0; |
| for (auto it = references_.begin(); it != references_.end();) { |
| std::vector<mirror::HeapReference<mirror::Object>*>& references = it->second; |
| // Since there is no card mark for setting a reference to null, we check each reference. |
| // If all of the references of a card are null then we can remove that card. This is racy |
| // with the mutators, but handled by rescanning dirty cards. |
| bool all_null = true; |
| for (mirror::HeapReference<mirror::Object>* obj_ptr : references) { |
| if (obj_ptr->AsMirrorPtr() != nullptr) { |
| all_null = false; |
| visitor->MarkHeapReference(obj_ptr); |
| } |
| } |
| count += references.size(); |
| if (!all_null) { |
| ++it; |
| } else { |
| // All null references, erase the array from the set. |
| it = references_.erase(it); |
| } |
| } |
| if (VLOG_IS_ON(heap)) { |
| VLOG(gc) << "Marked " << count << " references in mod union table"; |
| } |
| } |
| |
| ModUnionTableCardCache::ModUnionTableCardCache(const std::string& name, |
| Heap* heap, |
| space::ContinuousSpace* space) |
| : ModUnionTable(name, heap, space) { |
| // Normally here we could use End() instead of Limit(), but for testing we may want to have a |
| // mod-union table for a space which can still grow. |
| if (!space->IsImageSpace()) { |
| CHECK_ALIGNED(reinterpret_cast<uintptr_t>(space->Limit()), CardTable::kCardSize); |
| } |
| card_bitmap_.reset(CardBitmap::Create( |
| "mod union bitmap", reinterpret_cast<uintptr_t>(space->Begin()), |
| RoundUp(reinterpret_cast<uintptr_t>(space->Limit()), CardTable::kCardSize))); |
| } |
| |
| class CardBitVisitor { |
| public: |
| CardBitVisitor(MarkObjectVisitor* visitor, |
| space::ContinuousSpace* space, |
| space::ContinuousSpace* immune_space, |
| ModUnionTable::CardBitmap* card_bitmap) |
| : visitor_(visitor), |
| space_(space), |
| immune_space_(immune_space), |
| bitmap_(space->GetLiveBitmap()), |
| card_bitmap_(card_bitmap) { |
| DCHECK(immune_space_ != nullptr); |
| } |
| |
| void operator()(size_t bit_index) const { |
| const uintptr_t start = card_bitmap_->AddrFromBitIndex(bit_index); |
| DCHECK(space_->HasAddress(reinterpret_cast<mirror::Object*>(start))) |
| << start << " " << *space_; |
| bool reference_to_other_space = false; |
| ModUnionScanImageRootVisitor scan_visitor(visitor_, space_, immune_space_, |
| &reference_to_other_space); |
| bitmap_->VisitMarkedRange(start, start + CardTable::kCardSize, scan_visitor); |
| if (!reference_to_other_space) { |
| // No non null reference to another space, clear the bit. |
| card_bitmap_->ClearBit(bit_index); |
| } |
| } |
| |
| private: |
| MarkObjectVisitor* const visitor_; |
| space::ContinuousSpace* const space_; |
| space::ContinuousSpace* const immune_space_; |
| ContinuousSpaceBitmap* const bitmap_; |
| ModUnionTable::CardBitmap* const card_bitmap_; |
| }; |
| |
| void ModUnionTableCardCache::ClearCards() { |
| CardTable* const card_table = GetHeap()->GetCardTable(); |
| ModUnionAddToCardBitmapVisitor visitor(card_bitmap_.get(), card_table); |
| // Clear dirty cards in the this space and update the corresponding mod-union bits. |
| card_table->ModifyCardsAtomic(space_->Begin(), space_->End(), AgeCardVisitor(), visitor); |
| } |
| |
| void ModUnionTableCardCache::ClearTable() { |
| card_bitmap_->Bitmap::Clear(); |
| } |
| |
| // Mark all references to the alloc space(s). |
| void ModUnionTableCardCache::UpdateAndMarkReferences(MarkObjectVisitor* visitor) { |
| // TODO: Needs better support for multi-images? b/26317072 |
| space::ImageSpace* image_space = |
| heap_->GetBootImageSpaces().empty() ? nullptr : heap_->GetBootImageSpaces()[0]; |
| // If we don't have an image space, just pass in space_ as the immune space. Pass in the same |
| // space_ instead of image_space to avoid a null check in ModUnionUpdateObjectReferencesVisitor. |
| CardBitVisitor bit_visitor(visitor, space_, image_space != nullptr ? image_space : space_, |
| card_bitmap_.get()); |
| card_bitmap_->VisitSetBits( |
| 0, RoundUp(space_->Size(), CardTable::kCardSize) / CardTable::kCardSize, bit_visitor); |
| } |
| |
| void ModUnionTableCardCache::VisitObjects(ObjectCallback* callback, void* arg) { |
| card_bitmap_->VisitSetBits( |
| 0, |
| RoundUp(space_->Size(), CardTable::kCardSize) / CardTable::kCardSize, |
| [this, callback, arg](size_t bit_index) { |
| const uintptr_t start = card_bitmap_->AddrFromBitIndex(bit_index); |
| DCHECK(space_->HasAddress(reinterpret_cast<mirror::Object*>(start))) |
| << start << " " << *space_; |
| space_->GetLiveBitmap()->VisitMarkedRange(start, |
| start + CardTable::kCardSize, |
| [this, callback, arg](mirror::Object* obj) { |
| callback(obj, arg); |
| }); |
| }); |
| } |
| |
| void ModUnionTableCardCache::Dump(std::ostream& os) { |
| os << "ModUnionTable dirty cards: ["; |
| // TODO: Find cleaner way of doing this. |
| for (uint8_t* addr = space_->Begin(); addr < AlignUp(space_->End(), CardTable::kCardSize); |
| addr += CardTable::kCardSize) { |
| if (card_bitmap_->Test(reinterpret_cast<uintptr_t>(addr))) { |
| os << reinterpret_cast<void*>(addr) << "-" |
| << reinterpret_cast<void*>(addr + CardTable::kCardSize) << "\n"; |
| } |
| } |
| os << "]"; |
| } |
| |
| void ModUnionTableCardCache::SetCards() { |
| // Only clean up to the end since there cannot be any objects past the End() of the space. |
| for (uint8_t* addr = space_->Begin(); addr < AlignUp(space_->End(), CardTable::kCardSize); |
| addr += CardTable::kCardSize) { |
| card_bitmap_->Set(reinterpret_cast<uintptr_t>(addr)); |
| } |
| } |
| |
| bool ModUnionTableCardCache::ContainsCardFor(uintptr_t addr) { |
| return card_bitmap_->Test(addr); |
| } |
| |
| void ModUnionTableReferenceCache::SetCards() { |
| for (uint8_t* addr = space_->Begin(); addr < AlignUp(space_->End(), CardTable::kCardSize); |
| addr += CardTable::kCardSize) { |
| cleared_cards_.insert(heap_->GetCardTable()->CardFromAddr(reinterpret_cast<void*>(addr))); |
| } |
| } |
| |
| bool ModUnionTableReferenceCache::ContainsCardFor(uintptr_t addr) { |
| auto* card_ptr = heap_->GetCardTable()->CardFromAddr(reinterpret_cast<void*>(addr)); |
| return cleared_cards_.find(card_ptr) != cleared_cards_.end() || |
| references_.find(card_ptr) != references_.end(); |
| } |
| |
| } // namespace accounting |
| } // namespace gc |
| } // namespace art |
