space_bitmap.cc revision 700a402244a1a423da4f3ba8032459f4b65fa18f
1b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier/* 2b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * Copyright (C) 2008 The Android Open Source Project 3b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * 4b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * Licensed under the Apache License, Version 2.0 (the "License"); 5b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * you may not use this file except in compliance with the License. 6b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * You may obtain a copy of the License at 7b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * 8b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * http://www.apache.org/licenses/LICENSE-2.0 9b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * 10b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * Unless required by applicable law or agreed to in writing, software 11b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * distributed under the License is distributed on an "AS IS" BASIS, 12b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * See the License for the specific language governing permissions and 14b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier * limitations under the License. 15b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier */ 16b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 172dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers#include "space_bitmap-inl.h" 18b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 19b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartiernamespace art { 201d54e73444e017d3a65234e0f193846f3e27472bIan Rogersnamespace gc { 211d54e73444e017d3a65234e0f193846f3e27472bIan Rogersnamespace accounting { 22b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 23a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 2473d1e17b3afc7d5e56184f90bf819dc64956448aMathieu Chartiersize_t SpaceBitmap<kAlignment>::ComputeBitmapSize(uint64_t capacity) { 2573d1e17b3afc7d5e56184f90bf819dc64956448aMathieu Chartier const uint64_t kBytesCoveredPerWord = kAlignment * kBitsPerWord; 2673d1e17b3afc7d5e56184f90bf819dc64956448aMathieu Chartier return (RoundUp(capacity, kBytesCoveredPerWord) / kBytesCoveredPerWord) * kWordSize; 2773d1e17b3afc7d5e56184f90bf819dc64956448aMathieu Chartier} 2873d1e17b3afc7d5e56184f90bf819dc64956448aMathieu Chartier 2973d1e17b3afc7d5e56184f90bf819dc64956448aMathieu Chartiertemplate<size_t kAlignment> 30a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu ChartierSpaceBitmap<kAlignment>* SpaceBitmap<kAlignment>::CreateFromMemMap( 31a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier const std::string& name, MemMap* mem_map, byte* heap_begin, size_t heap_capacity) { 3231e8925781c2302f1d1a9b39e216ba415bfe0d7eMathieu Chartier CHECK(mem_map != nullptr); 33cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe uword* bitmap_begin = reinterpret_cast<uword*>(mem_map->Begin()); 3473d1e17b3afc7d5e56184f90bf819dc64956448aMathieu Chartier const size_t bitmap_size = ComputeBitmapSize(heap_capacity); 3531e8925781c2302f1d1a9b39e216ba415bfe0d7eMathieu Chartier return new SpaceBitmap(name, mem_map, bitmap_begin, bitmap_size, heap_begin); 3631e8925781c2302f1d1a9b39e216ba415bfe0d7eMathieu Chartier} 3731e8925781c2302f1d1a9b39e216ba415bfe0d7eMathieu Chartier 38a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 39bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu ChartierSpaceBitmap<kAlignment>::SpaceBitmap(const std::string& name, MemMap* mem_map, uword* bitmap_begin, 40bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier size_t bitmap_size, const void* heap_begin) 41bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier : mem_map_(mem_map), bitmap_begin_(bitmap_begin), bitmap_size_(bitmap_size), 42bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier heap_begin_(reinterpret_cast<uintptr_t>(heap_begin)), 43bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier name_(name) { 44bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier CHECK(bitmap_begin_ != nullptr); 45bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier CHECK_NE(bitmap_size, 0U); 46bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier} 47bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier 48bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartiertemplate<size_t kAlignment> 49a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu ChartierSpaceBitmap<kAlignment>* SpaceBitmap<kAlignment>::Create( 50a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier const std::string& name, byte* heap_begin, size_t heap_capacity) { 51b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier // Round up since heap_capacity is not necessarily a multiple of kAlignment * kBitsPerWord. 5273d1e17b3afc7d5e56184f90bf819dc64956448aMathieu Chartier const size_t bitmap_size = ComputeBitmapSize(heap_capacity); 538d31bbd3d6536de12bc20e3d29cfe03fe848f9daIan Rogers std::string error_msg; 54700a402244a1a423da4f3ba8032459f4b65fa18fIan Rogers std::unique_ptr<MemMap> mem_map(MemMap::MapAnonymous(name.c_str(), nullptr, bitmap_size, 55ef7d42fca18c16fbaf103822ad16f23246e2905dIan Rogers PROT_READ | PROT_WRITE, false, &error_msg)); 568d31bbd3d6536de12bc20e3d29cfe03fe848f9daIan Rogers if (UNLIKELY(mem_map.get() == nullptr)) { 578d31bbd3d6536de12bc20e3d29cfe03fe848f9daIan Rogers LOG(ERROR) << "Failed to allocate bitmap " << name << ": " << error_msg; 58bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier return nullptr; 59b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 6031e8925781c2302f1d1a9b39e216ba415bfe0d7eMathieu Chartier return CreateFromMemMap(name, mem_map.release(), heap_begin, heap_capacity); 61b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier} 62b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 63a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 64a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiervoid SpaceBitmap<kAlignment>::SetHeapLimit(uintptr_t new_end) { 65dcf8d7283bd51714f3faa55b631ae4103dc98b51Mathieu Chartier DCHECK(IsAligned<kBitsPerWord * kAlignment>(new_end)); 66dcf8d7283bd51714f3faa55b631ae4103dc98b51Mathieu Chartier size_t new_size = OffsetToIndex(new_end - heap_begin_) * kWordSize; 67cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier if (new_size < bitmap_size_) { 68cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier bitmap_size_ = new_size; 69cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier } 70cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier // Not sure if doing this trim is necessary, since nothing past the end of the heap capacity 71cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier // should be marked. 72cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier} 73cc236d74772dda5a4161d9bc5f497fd3d956eb87Mathieu Chartier 74a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 75a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiervoid SpaceBitmap<kAlignment>::Clear() { 76b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (bitmap_begin_ != NULL) { 7731e8925781c2302f1d1a9b39e216ba415bfe0d7eMathieu Chartier // This returns the memory to the system. Successive page faults will return zeroed memory. 78b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier int result = madvise(bitmap_begin_, bitmap_size_, MADV_DONTNEED); 79b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (result == -1) { 807469ebf3888b8037421cb6834f37f946646265ecMathieu Chartier PLOG(FATAL) << "madvise failed"; 81b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 82b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 83b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier} 84b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 85a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 86bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartiervoid SpaceBitmap<kAlignment>::CopyFrom(SpaceBitmap* source_bitmap) { 87357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier DCHECK_EQ(Size(), source_bitmap->Size()); 88357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier std::copy(source_bitmap->Begin(), source_bitmap->Begin() + source_bitmap->Size() / kWordSize, Begin()); 89357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier} 90357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier 91a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 92bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartiervoid SpaceBitmap<kAlignment>::Walk(ObjectCallback* callback, void* arg) { 93b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier CHECK(bitmap_begin_ != NULL); 94b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier CHECK(callback != NULL); 95357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier 96357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier uintptr_t end = OffsetToIndex(HeapLimit() - heap_begin_ - 1); 97cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe uword* bitmap_begin = bitmap_begin_; 98b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier for (uintptr_t i = 0; i <= end; ++i) { 99cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe uword w = bitmap_begin[i]; 100357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier if (w != 0) { 101b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier uintptr_t ptr_base = IndexToOffset(i) + heap_begin_; 102357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier do { 103cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe const size_t shift = CTZ(w); 1042dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Object* obj = reinterpret_cast<mirror::Object*>(ptr_base + shift * kAlignment); 105b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier (*callback)(obj, arg); 106cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe w ^= (static_cast<uword>(1)) << shift; 107357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } while (w != 0); 108b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 109b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 110b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier} 111b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 112a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 113a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiervoid SpaceBitmap<kAlignment>::SweepWalk(const SpaceBitmap<kAlignment>& live_bitmap, 114bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier const SpaceBitmap<kAlignment>& mark_bitmap, 115bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier uintptr_t sweep_begin, uintptr_t sweep_end, 116bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier SpaceBitmap::SweepCallback* callback, void* arg) { 117bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier CHECK(live_bitmap.bitmap_begin_ != nullptr); 118bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier CHECK(mark_bitmap.bitmap_begin_ != nullptr); 119b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier CHECK_EQ(live_bitmap.heap_begin_, mark_bitmap.heap_begin_); 120b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier CHECK_EQ(live_bitmap.bitmap_size_, mark_bitmap.bitmap_size_); 121b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier CHECK(callback != NULL); 122b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier CHECK_LE(sweep_begin, sweep_end); 123b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier CHECK_GE(sweep_begin, live_bitmap.heap_begin_); 124357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier 125357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier if (sweep_end <= sweep_begin) { 126b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier return; 127b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 128357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier 1292dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers // TODO: rewrite the callbacks to accept a std::vector<mirror::Object*> rather than a mirror::Object**? 130357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier const size_t buffer_size = kWordSize * kBitsPerWord; 1312dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Object* pointer_buf[buffer_size]; 1322dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Object** pb = &pointer_buf[0]; 133b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier size_t start = OffsetToIndex(sweep_begin - live_bitmap.heap_begin_); 134357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier size_t end = OffsetToIndex(sweep_end - live_bitmap.heap_begin_ - 1); 135357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier CHECK_LT(end, live_bitmap.Size() / kWordSize); 136cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe uword* live = live_bitmap.bitmap_begin_; 137cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe uword* mark = mark_bitmap.bitmap_begin_; 138b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier for (size_t i = start; i <= end; i++) { 139cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe uword garbage = live[i] & ~mark[i]; 140b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (UNLIKELY(garbage != 0)) { 141b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier uintptr_t ptr_base = IndexToOffset(i) + live_bitmap.heap_begin_; 142357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier do { 143cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe const size_t shift = CTZ(garbage); 144cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe garbage ^= (static_cast<uword>(1)) << shift; 1452dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers *pb++ = reinterpret_cast<mirror::Object*>(ptr_base + shift * kAlignment); 146357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier } while (garbage != 0); 147b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier // Make sure that there are always enough slots available for an 148b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier // entire word of one bits. 149357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier if (pb >= &pointer_buf[buffer_size - kBitsPerWord]) { 150b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier (*callback)(pb - &pointer_buf[0], &pointer_buf[0], arg); 151b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier pb = &pointer_buf[0]; 152b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 153b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 154b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 155b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (pb > &pointer_buf[0]) { 156b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier (*callback)(pb - &pointer_buf[0], &pointer_buf[0], arg); 157b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 158b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier} 159b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 160a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 161a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiervoid SpaceBitmap<kAlignment>::WalkInstanceFields(SpaceBitmap<kAlignment>* visited, 162a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier ObjectCallback* callback, mirror::Object* obj, 163a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier mirror::Class* klass, void* arg) 164b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 165b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier // Visit fields of parent classes first. 1662dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Class* super = klass->GetSuperClass(); 167b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (super != NULL) { 168b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier WalkInstanceFields(visited, callback, obj, super, arg); 169b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 170b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier // Walk instance fields 171ea46f950e7a51585db293cd7f047de190a482414Brian Carlstrom mirror::ObjectArray<mirror::ArtField>* fields = klass->GetIFields(); 172b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (fields != NULL) { 173b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier for (int32_t i = 0; i < fields->GetLength(); i++) { 174ea46f950e7a51585db293cd7f047de190a482414Brian Carlstrom mirror::ArtField* field = fields->Get(i); 175b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier FieldHelper fh(field); 17666f19258f9728d4ffe026074d8fd429d639802faMathieu Chartier if (!fh.IsPrimitiveType()) { 1772dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Object* value = field->GetObj(obj); 178b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (value != NULL) { 179b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier WalkFieldsInOrder(visited, callback, value, arg); 180b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 181b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 182b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 183b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 184b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier} 185b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 186a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 187a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiervoid SpaceBitmap<kAlignment>::WalkFieldsInOrder(SpaceBitmap<kAlignment>* visited, 188bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier ObjectCallback* callback, mirror::Object* obj, 189bbd695c71e0bf518f582e84524e1cdeb3de3896cMathieu Chartier void* arg) { 190b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (visited->Test(obj)) { 191b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier return; 192b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 193b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier // visit the object itself 194b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier (*callback)(obj, arg); 195b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier visited->Set(obj); 196b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier // Walk instance fields of all objects 1972dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Class* klass = obj->GetClass(); 198b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier WalkInstanceFields(visited, callback, obj, klass, arg); 199b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier // Walk static fields of a Class 200b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (obj->IsClass()) { 201ea46f950e7a51585db293cd7f047de190a482414Brian Carlstrom mirror::ObjectArray<mirror::ArtField>* fields = klass->GetSFields(); 202b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (fields != NULL) { 203b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier for (int32_t i = 0; i < fields->GetLength(); i++) { 204ea46f950e7a51585db293cd7f047de190a482414Brian Carlstrom mirror::ArtField* field = fields->Get(i); 205b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier FieldHelper fh(field); 20666f19258f9728d4ffe026074d8fd429d639802faMathieu Chartier if (!fh.IsPrimitiveType()) { 2072dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Object* value = field->GetObj(NULL); 208b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (value != NULL) { 209b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier WalkFieldsInOrder(visited, callback, value, arg); 210b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 211b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 212b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 213b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 214b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } else if (obj->IsObjectArray()) { 215b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier // Walk elements of an object array 2162dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::ObjectArray<mirror::Object>* obj_array = obj->AsObjectArray<mirror::Object>(); 217b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier int32_t length = obj_array->GetLength(); 218b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier for (int32_t i = 0; i < length; i++) { 2192dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Object* value = obj_array->Get(i); 220b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (value != NULL) { 221b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier WalkFieldsInOrder(visited, callback, value, arg); 222b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 223b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 224b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 225b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier} 226b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 227a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate<size_t kAlignment> 228a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiervoid SpaceBitmap<kAlignment>::InOrderWalk(ObjectCallback* callback, void* arg) { 229700a402244a1a423da4f3ba8032459f4b65fa18fIan Rogers std::unique_ptr<SpaceBitmap<kAlignment>> visited( 230a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier Create("bitmap for in-order walk", reinterpret_cast<byte*>(heap_begin_), 231a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier IndexToOffset(bitmap_size_ / kWordSize))); 232a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier CHECK(bitmap_begin_ != nullptr); 233a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier CHECK(callback != nullptr); 234357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier uintptr_t end = Size() / kWordSize; 235357e9be24c17a6bc2ae9fb53f25c73503116101dMathieu Chartier for (uintptr_t i = 0; i < end; ++i) { 236cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe // Need uint for unsigned shift. 237cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe uword w = bitmap_begin_[i]; 238b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier if (UNLIKELY(w != 0)) { 239b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier uintptr_t ptr_base = IndexToOffset(i) + heap_begin_; 240b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier while (w != 0) { 241cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe const size_t shift = CTZ(w); 2422dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers mirror::Object* obj = reinterpret_cast<mirror::Object*>(ptr_base + shift * kAlignment); 243b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier WalkFieldsInOrder(visited.get(), callback, obj, arg); 244cb8aea4bd5e77857c713edeb62bffcb1f7f06a39Andreas Gampe w ^= (static_cast<uword>(1)) << shift; 245b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 246b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 247b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier } 248b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier} 249b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier 250a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate class SpaceBitmap<kObjectAlignment>; 251a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartiertemplate class SpaceBitmap<kPageSize>; 252a8e8f9c0a8e259a807d7b99a148d14104c24209dMathieu Chartier 2531d54e73444e017d3a65234e0f193846f3e27472bIan Rogers} // namespace accounting 2541d54e73444e017d3a65234e0f193846f3e27472bIan Rogers} // namespace gc 255b062fdd4cb097fbae69b4bcb479c34d83ecab8caMathieu Chartier} // namespace art 256