Elliott Hughes | 2faa5f1 | 2012-01-30 14:42:07 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 16 | |
| 17 | #ifndef ART_SRC_MARK_SWEEP_H_ |
| 18 | #define ART_SRC_MARK_SWEEP_H_ |
| 19 | |
Mathieu Chartier | d8195f1 | 2012-10-05 12:21:28 -0700 | [diff] [blame] | 20 | #include "atomic_stack.h" |
Brian Carlstrom | 578bbdc | 2011-07-21 14:07:47 -0700 | [diff] [blame] | 21 | #include "macros.h" |
Elliott Hughes | 5e71b52 | 2011-10-20 13:12:32 -0700 | [diff] [blame] | 22 | #include "heap_bitmap.h" |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 23 | #include "object.h" |
Ian Rogers | 0cfe1fb | 2011-08-26 03:29:44 -0700 | [diff] [blame] | 24 | #include "offsets.h" |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 25 | |
| 26 | namespace art { |
| 27 | |
Mathieu Chartier | 858f1c5 | 2012-10-17 17:45:55 -0700 | [diff] [blame] | 28 | class Barrier; |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 29 | class CheckObjectVisitor; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 30 | class Class; |
Elliott Hughes | b3bd5f0 | 2012-03-08 21:05:27 -0800 | [diff] [blame] | 31 | class Heap; |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 32 | class MarkIfReachesAllocspaceVisitor; |
| 33 | class ModUnionClearCardVisitor; |
| 34 | class ModUnionVisitor; |
| 35 | class ModUnionTableBitmap; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 36 | class Object; |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 37 | class TimingLogger; |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 38 | class MarkStackChunk; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 39 | |
| 40 | class MarkSweep { |
| 41 | public: |
Mathieu Chartier | d8195f1 | 2012-10-05 12:21:28 -0700 | [diff] [blame] | 42 | explicit MarkSweep(ObjectStack* mark_stack); |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 43 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 44 | ~MarkSweep(); |
| 45 | |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 46 | // Initializes internal structures. |
Jesse Wilson | 078f9b0 | 2011-11-18 17:51:47 -0500 | [diff] [blame] | 47 | void Init(); |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 48 | |
Mathieu Chartier | 7469ebf | 2012-09-24 16:28:36 -0700 | [diff] [blame] | 49 | // Find the default mark bitmap. |
| 50 | void FindDefaultMarkBitmap(); |
| 51 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 52 | // Marks the root set at the start of a garbage collection. |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 53 | void MarkRoots() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 54 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 55 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 56 | |
Mathieu Chartier | 858f1c5 | 2012-10-17 17:45:55 -0700 | [diff] [blame] | 57 | void MarkNonThreadRoots() |
| 58 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 59 | |
Mathieu Chartier | 9ebae1f | 2012-10-15 17:38:16 -0700 | [diff] [blame] | 60 | void MarkConcurrentRoots(); |
| 61 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 62 | |
Mathieu Chartier | 858f1c5 | 2012-10-17 17:45:55 -0700 | [diff] [blame] | 63 | void MarkRootsCheckpoint(); |
| 64 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 65 | |
Mathieu Chartier | 262e5ff | 2012-06-01 17:35:38 -0700 | [diff] [blame] | 66 | // Verify that image roots point to only marked objects within the alloc space. |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 67 | void VerifyImageRoots() EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Mathieu Chartier | 262e5ff | 2012-06-01 17:35:38 -0700 | [diff] [blame] | 68 | |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 69 | // Builds a mark stack and recursively mark until it empties. |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 70 | void RecursiveMark(bool partial, TimingLogger& timings) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 71 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 72 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Mathieu Chartier | cc236d7 | 2012-07-20 10:29:05 -0700 | [diff] [blame] | 73 | |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 74 | // Copies mark bits from live bitmap of ZygoteSpace to mark bitmap for partial GCs. |
Mathieu Chartier | 2fde533 | 2012-09-14 14:51:54 -0700 | [diff] [blame] | 75 | void CopyMarkBits(ContinuousSpace* space); |
Mathieu Chartier | 7469ebf | 2012-09-24 16:28:36 -0700 | [diff] [blame] | 76 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 77 | |
| 78 | void BindLiveToMarkBitmap(ContinuousSpace* space) |
| 79 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 80 | |
| 81 | void UnBindBitmaps() |
| 82 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 83 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 84 | // Builds a mark stack with objects on dirty cards and recursively mark until it empties. |
| 85 | void RecursiveMarkDirtyObjects() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 86 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 87 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Mathieu Chartier | 262e5ff | 2012-06-01 17:35:38 -0700 | [diff] [blame] | 88 | |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 89 | // Recursive mark objects on specified cards. Updates finger. |
| 90 | void RecursiveMarkCards(CardTable* card_table, const std::vector<byte*>& cards, |
| 91 | TimingLogger& timings) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 92 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 93 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);; |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 94 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 95 | // Remarks the root set after completing the concurrent mark. |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 96 | void ReMarkRoots() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 97 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 98 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 99 | |
Mathieu Chartier | cc236d7 | 2012-07-20 10:29:05 -0700 | [diff] [blame] | 100 | Heap* GetHeap() { |
| 101 | return heap_; |
| 102 | } |
| 103 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 104 | void ProcessReferences(bool clear_soft_references) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 105 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 106 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 107 | ProcessReferences(&soft_reference_list_, clear_soft_references, |
| 108 | &weak_reference_list_, |
| 109 | &finalizer_reference_list_, |
| 110 | &phantom_reference_list_); |
| 111 | } |
| 112 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 113 | // Sweeps unmarked objects to complete the garbage collection. |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 114 | void Sweep(TimingLogger& timings, bool partial, bool swap_bitmaps) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 115 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 116 | |
Mathieu Chartier | e0f0cb3 | 2012-08-28 11:26:00 -0700 | [diff] [blame] | 117 | // Sweeps unmarked objects to complete the garbage collection. |
| 118 | void SweepLargeObjects(bool swap_bitmaps) |
| 119 | EXCLUSIVE_LOCKS_REQUIRED(GlobalSynchronization::heap_bitmap_lock_); |
| 120 | |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 121 | // Sweep only pointers within an array. WARNING: Trashes objects. |
Mathieu Chartier | d8195f1 | 2012-10-05 12:21:28 -0700 | [diff] [blame] | 122 | void SweepArray(TimingLogger& logger, ObjectStack* allocation_stack_, bool swap_bitmaps) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 123 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 124 | |
Elliott Hughes | adb460d | 2011-10-05 17:02:34 -0700 | [diff] [blame] | 125 | Object* GetClearedReferences() { |
| 126 | return cleared_reference_list_; |
| 127 | } |
| 128 | |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 129 | // Proxy for external access to ScanObject. |
| 130 | void ScanRoot(const Object* obj) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 131 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 132 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 133 | |
Mathieu Chartier | cc236d7 | 2012-07-20 10:29:05 -0700 | [diff] [blame] | 134 | // Blackens an object. |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 135 | void ScanObject(const Object* obj) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 136 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 137 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Mathieu Chartier | cc236d7 | 2012-07-20 10:29:05 -0700 | [diff] [blame] | 138 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 139 | template <typename MarkVisitor> |
| 140 | void ScanObjectVisit(const Object* obj, const MarkVisitor& visitor) |
| 141 | NO_THREAD_SAFETY_ANALYSIS { |
| 142 | DCHECK(obj != NULL); |
| 143 | if (kIsDebugBuild && !IsMarked(obj)) { |
| 144 | heap_->DumpSpaces(); |
| 145 | LOG(FATAL) << "Scanning unmarked object " << obj; |
| 146 | } |
| 147 | Class* klass = obj->GetClass(); |
| 148 | DCHECK(klass != NULL); |
| 149 | if (klass == java_lang_Class_) { |
| 150 | DCHECK_EQ(klass->GetClass(), java_lang_Class_); |
| 151 | if (kCountScannedTypes) { |
| 152 | ++class_count_; |
| 153 | } |
| 154 | VisitClassReferences(klass, obj, visitor); |
| 155 | } else if (klass->IsArrayClass()) { |
| 156 | if (kCountScannedTypes) { |
| 157 | ++array_count_; |
| 158 | } |
| 159 | visitor(obj, klass, Object::ClassOffset(), false); |
| 160 | if (klass->IsObjectArrayClass()) { |
| 161 | VisitObjectArrayReferences(obj->AsObjectArray<Object>(), visitor); |
| 162 | } |
| 163 | } else { |
| 164 | if (kCountScannedTypes) { |
| 165 | ++other_count_; |
| 166 | } |
| 167 | VisitOtherReferences(klass, obj, visitor); |
| 168 | if (klass->IsReferenceClass()) { |
| 169 | DelayReferenceReferent(const_cast<Object*>(obj)); |
| 170 | } |
| 171 | } |
| 172 | } |
| 173 | |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 174 | void SetFinger(Object* new_finger) { |
| 175 | finger_ = new_finger; |
| 176 | } |
| 177 | |
| 178 | void DisableFinger() { |
| 179 | SetFinger(reinterpret_cast<Object*>(~static_cast<uintptr_t>(0))); |
| 180 | } |
| 181 | |
| 182 | size_t GetFreedBytes() const { |
| 183 | return freed_bytes_; |
| 184 | } |
| 185 | |
| 186 | size_t GetFreedObjects() const { |
| 187 | return freed_objects_; |
| 188 | } |
| 189 | |
Mathieu Chartier | e0f0cb3 | 2012-08-28 11:26:00 -0700 | [diff] [blame] | 190 | // Everything inside the immune range is marked. |
| 191 | void SetImmuneRange(Object* begin, Object* end) { |
| 192 | immune_begin_ = begin; |
| 193 | immune_end_ = end; |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 194 | } |
| 195 | |
Mathieu Chartier | 7469ebf | 2012-09-24 16:28:36 -0700 | [diff] [blame] | 196 | void SweepSystemWeaks() |
| 197 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 198 | |
| 199 | // Only sweep the weaks which are inside of an allocation stack. |
| 200 | void SweepSystemWeaksArray(ObjectStack* allocations) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 201 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Mathieu Chartier | 357e9be | 2012-08-01 11:00:14 -0700 | [diff] [blame] | 202 | |
Mathieu Chartier | c7b83a0 | 2012-09-11 18:07:39 -0700 | [diff] [blame] | 203 | static bool VerifyIsLiveCallback(const Object* obj, void* arg) |
| 204 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 205 | |
| 206 | void VerifySystemWeaks() |
| 207 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 208 | |
| 209 | // Verify that an object is live, either in a live bitmap or in the allocation stack. |
| 210 | void VerifyIsLive(const Object* obj) |
| 211 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 212 | |
Mathieu Chartier | fd678be | 2012-08-30 14:50:54 -0700 | [diff] [blame] | 213 | template <typename Visitor> |
| 214 | static void VisitObjectReferences(const Object* obj, const Visitor& visitor) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 215 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, |
| 216 | Locks::mutator_lock_) { |
Mathieu Chartier | fd678be | 2012-08-30 14:50:54 -0700 | [diff] [blame] | 217 | DCHECK(obj != NULL); |
| 218 | DCHECK(obj->GetClass() != NULL); |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 219 | |
| 220 | Class* klass = obj->GetClass(); |
| 221 | DCHECK(klass != NULL); |
| 222 | if (klass == Class::GetJavaLangClass()) { |
| 223 | DCHECK_EQ(klass->GetClass(), Class::GetJavaLangClass()); |
| 224 | VisitClassReferences(klass, obj, visitor); |
Mathieu Chartier | fd678be | 2012-08-30 14:50:54 -0700 | [diff] [blame] | 225 | } else { |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 226 | if (klass->IsArrayClass()) { |
| 227 | visitor(obj, klass, Object::ClassOffset(), false); |
| 228 | if (klass->IsObjectArrayClass()) { |
| 229 | VisitObjectArrayReferences(obj->AsObjectArray<Object>(), visitor); |
| 230 | } |
| 231 | } else { |
| 232 | VisitOtherReferences(klass, obj, visitor); |
| 233 | } |
Mathieu Chartier | fd678be | 2012-08-30 14:50:54 -0700 | [diff] [blame] | 234 | } |
| 235 | } |
| 236 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 237 | static void MarkObjectCallback(const Object* root, void* arg) |
| 238 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 239 | |
| 240 | // Marks an object. |
| 241 | void MarkObject(const Object* obj) |
Mathieu Chartier | 858f1c5 | 2012-10-17 17:45:55 -0700 | [diff] [blame] | 242 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
| 243 | |
| 244 | Barrier& GetBarrier(); |
| 245 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 246 | private: |
| 247 | // Returns true if the object has its bit set in the mark bitmap. |
Mathieu Chartier | 7469ebf | 2012-09-24 16:28:36 -0700 | [diff] [blame] | 248 | bool IsMarked(const Object* object) const; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 249 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 250 | static bool IsMarkedCallback(const Object* object, void* arg) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 251 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Elliott Hughes | c33a32b | 2011-10-11 18:18:07 -0700 | [diff] [blame] | 252 | |
Mathieu Chartier | 7469ebf | 2012-09-24 16:28:36 -0700 | [diff] [blame] | 253 | static bool IsMarkedArrayCallback(const Object* object, void* arg) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 254 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Mathieu Chartier | 46a2363 | 2012-08-07 18:44:40 -0700 | [diff] [blame] | 255 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 256 | static void ReMarkObjectVisitor(const Object* root, void* arg) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 257 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Mathieu Chartier | 262e5ff | 2012-06-01 17:35:38 -0700 | [diff] [blame] | 258 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 259 | static void VerifyImageRootVisitor(Object* root, void* arg) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 260 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, |
| 261 | Locks::mutator_lock_); |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 262 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 263 | static void ScanDirtyCardCallback(Object* obj, void* arg) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 264 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 265 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Mathieu Chartier | 262e5ff | 2012-06-01 17:35:38 -0700 | [diff] [blame] | 266 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 267 | void MarkObjectNonNull(const Object* obj, bool check_finger) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 268 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 269 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 270 | bool MarkLargeObject(const Object* obj) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 271 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 272 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 273 | // Returns true if we need to add obj to a mark stack. |
| 274 | bool MarkObjectParallel(const Object* obj) NO_THREAD_SAFETY_ANALYSIS; |
| 275 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 276 | static void ScanBitmapCallback(Object* obj, void* finger, void* arg) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 277 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 278 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 279 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 280 | static void SweepCallback(size_t num_ptrs, Object** ptrs, void* arg) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 281 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 282 | |
Mathieu Chartier | cc236d7 | 2012-07-20 10:29:05 -0700 | [diff] [blame] | 283 | // Special sweep for zygote that just marks objects / dirties cards. |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 284 | static void ZygoteSweepCallback(size_t num_ptrs, Object** ptrs, void* arg) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 285 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Ian Rogers | 5d76c43 | 2011-10-31 21:42:49 -0700 | [diff] [blame] | 286 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 287 | void CheckReference(const Object* obj, const Object* ref, MemberOffset offset, bool is_static) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 288 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, Locks::mutator_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 289 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 290 | void CheckObject(const Object* obj) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 291 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, Locks::mutator_lock_); |
Ian Rogers | 5d76c43 | 2011-10-31 21:42:49 -0700 | [diff] [blame] | 292 | |
Mathieu Chartier | 6f1c949 | 2012-10-15 12:08:41 -0700 | [diff] [blame] | 293 | // Verify the roots of the heap and print out information related to any invalid roots. |
| 294 | // Called in MarkObject, so may we may not hold the mutator lock. |
| 295 | void VerifyRoots() |
| 296 | NO_THREAD_SAFETY_ANALYSIS; |
| 297 | |
| 298 | static void VerifyRootCallback(const Object* root, void* arg, size_t vreg, |
| 299 | const AbstractMethod* method); |
| 300 | |
| 301 | void VerifyRoot(const Object* root, size_t vreg, const AbstractMethod* method) |
| 302 | NO_THREAD_SAFETY_ANALYSIS; |
| 303 | |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 304 | template <typename Visitor> |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 305 | static void VisitInstanceFieldsReferences(const Class* klass, const Object* obj, |
| 306 | const Visitor& visitor) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 307 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, Locks::mutator_lock_) { |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 308 | DCHECK(obj != NULL); |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 309 | DCHECK(klass != NULL); |
| 310 | VisitFieldsReferences(obj, klass->GetReferenceInstanceOffsets(), false, visitor); |
| 311 | } |
Ian Rogers | 5d76c43 | 2011-10-31 21:42:49 -0700 | [diff] [blame] | 312 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 313 | // Visit the header, static field references, and interface pointers of a class object. |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 314 | template <typename Visitor> |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 315 | static void VisitClassReferences(const Class* klass, const Object* obj, |
| 316 | const Visitor& visitor) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 317 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, Locks::mutator_lock_) { |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 318 | VisitInstanceFieldsReferences(klass, obj, visitor); |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 319 | VisitStaticFieldsReferences(obj->AsClass(), visitor); |
| 320 | } |
Ian Rogers | 5d76c43 | 2011-10-31 21:42:49 -0700 | [diff] [blame] | 321 | |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 322 | template <typename Visitor> |
Mathieu Chartier | fd678be | 2012-08-30 14:50:54 -0700 | [diff] [blame] | 323 | static void VisitStaticFieldsReferences(const Class* klass, const Visitor& visitor) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 324 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, Locks::mutator_lock_) { |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 325 | DCHECK(klass != NULL); |
| 326 | VisitFieldsReferences(klass, klass->GetReferenceStaticOffsets(), true, visitor); |
| 327 | } |
Ian Rogers | 5d76c43 | 2011-10-31 21:42:49 -0700 | [diff] [blame] | 328 | |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 329 | template <typename Visitor> |
Mathieu Chartier | fd678be | 2012-08-30 14:50:54 -0700 | [diff] [blame] | 330 | static void VisitFieldsReferences(const Object* obj, uint32_t ref_offsets, bool is_static, |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 331 | const Visitor& visitor) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 332 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, |
| 333 | Locks::mutator_lock_) { |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 334 | if (ref_offsets != CLASS_WALK_SUPER) { |
| 335 | // Found a reference offset bitmap. Mark the specified offsets. |
| 336 | while (ref_offsets != 0) { |
| 337 | size_t right_shift = CLZ(ref_offsets); |
| 338 | MemberOffset field_offset = CLASS_OFFSET_FROM_CLZ(right_shift); |
| 339 | const Object* ref = obj->GetFieldObject<const Object*>(field_offset, false); |
| 340 | visitor(obj, ref, field_offset, is_static); |
| 341 | ref_offsets &= ~(CLASS_HIGH_BIT >> right_shift); |
| 342 | } |
| 343 | } else { |
| 344 | // There is no reference offset bitmap. In the non-static case, |
| 345 | // walk up the class inheritance hierarchy and find reference |
| 346 | // offsets the hard way. In the static case, just consider this |
| 347 | // class. |
| 348 | for (const Class* klass = is_static ? obj->AsClass() : obj->GetClass(); |
| 349 | klass != NULL; |
| 350 | klass = is_static ? NULL : klass->GetSuperClass()) { |
| 351 | size_t num_reference_fields = (is_static |
| 352 | ? klass->NumReferenceStaticFields() |
| 353 | : klass->NumReferenceInstanceFields()); |
| 354 | for (size_t i = 0; i < num_reference_fields; ++i) { |
| 355 | Field* field = (is_static |
| 356 | ? klass->GetStaticField(i) |
| 357 | : klass->GetInstanceField(i)); |
| 358 | MemberOffset field_offset = field->GetOffset(); |
| 359 | const Object* ref = obj->GetFieldObject<const Object*>(field_offset, false); |
| 360 | visitor(obj, ref, field_offset, is_static); |
| 361 | } |
| 362 | } |
| 363 | } |
| 364 | } |
Ian Rogers | 5d76c43 | 2011-10-31 21:42:49 -0700 | [diff] [blame] | 365 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 366 | // Visit all of the references in an object array. |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 367 | template <typename Visitor> |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 368 | static void VisitObjectArrayReferences(const ObjectArray<Object>* array, |
| 369 | const Visitor& visitor) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 370 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, Locks::mutator_lock_) { |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 371 | const int32_t length = array->GetLength(); |
| 372 | for (int32_t i = 0; i < length; ++i) { |
| 373 | const Object* element = array->GetWithoutChecks(i); |
| 374 | const size_t width = sizeof(Object*); |
| 375 | MemberOffset offset = MemberOffset(i * width + Array::DataOffset(width).Int32Value()); |
| 376 | visitor(array, element, offset, false); |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 377 | } |
| 378 | } |
Ian Rogers | 5d76c43 | 2011-10-31 21:42:49 -0700 | [diff] [blame] | 379 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 380 | // Visits the header and field references of a data object. |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 381 | template <typename Visitor> |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 382 | static void VisitOtherReferences(const Class* klass, const Object* obj, |
| 383 | const Visitor& visitor) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 384 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, Locks::mutator_lock_) { |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 385 | return VisitInstanceFieldsReferences(klass, obj, visitor); |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 386 | } |
Ian Rogers | 5d76c43 | 2011-10-31 21:42:49 -0700 | [diff] [blame] | 387 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 388 | // Blackens objects grayed during a garbage collection. |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 389 | void ScanGrayObjects() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 390 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 391 | |
| 392 | // Schedules an unmarked object for reference processing. |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 393 | void DelayReferenceReferent(Object* reference) |
Ian Rogers | 23435d0 | 2012-09-24 11:23:12 -0700 | [diff] [blame] | 394 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, Locks::mutator_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 395 | |
| 396 | // Recursively blackens objects on the mark stack. |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 397 | void ProcessMarkStack() |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 398 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 399 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 400 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 401 | void ProcessMarkStackParallel() |
| 402 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 403 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| 404 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 405 | void EnqueueFinalizerReferences(Object** ref) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 406 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 407 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 408 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 409 | void PreserveSomeSoftReferences(Object** ref) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 410 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 411 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 412 | |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 413 | void ClearWhiteReferences(Object** list) |
Ian Rogers | 23435d0 | 2012-09-24 11:23:12 -0700 | [diff] [blame] | 414 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, Locks::mutator_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 415 | |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 416 | void ProcessReferences(Object** soft_references, bool clear_soft_references, |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 417 | Object** weak_references, |
| 418 | Object** finalizer_references, |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 419 | Object** phantom_references) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 420 | EXCLUSIVE_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) |
| 421 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 422 | |
Mathieu Chartier | 7469ebf | 2012-09-24 16:28:36 -0700 | [diff] [blame] | 423 | void SweepJniWeakGlobals(Heap::IsMarkedTester is_marked, void* arg) |
Ian Rogers | b726dcb | 2012-09-05 08:57:23 -0700 | [diff] [blame] | 424 | SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_); |
Carl Shapiro | 58551df | 2011-07-24 03:09:51 -0700 | [diff] [blame] | 425 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 426 | // Whether or not we count how many of each type of object were scanned. |
| 427 | static const bool kCountScannedTypes = false; |
| 428 | |
Mathieu Chartier | b062fdd | 2012-07-03 09:51:48 -0700 | [diff] [blame] | 429 | // Current space, we check this space first to avoid searching for the appropriate space for an object. |
| 430 | SpaceBitmap* current_mark_bitmap_; |
| 431 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 432 | // Cache java.lang.Class for optimization. |
| 433 | Class* java_lang_Class_; |
| 434 | |
Mathieu Chartier | d8195f1 | 2012-10-05 12:21:28 -0700 | [diff] [blame] | 435 | ObjectStack* mark_stack_; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 436 | |
Elliott Hughes | b3bd5f0 | 2012-03-08 21:05:27 -0800 | [diff] [blame] | 437 | Heap* heap_; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 438 | |
| 439 | Object* finger_; |
| 440 | |
Mathieu Chartier | e0f0cb3 | 2012-08-28 11:26:00 -0700 | [diff] [blame] | 441 | // Immune range, every object inside the immune range is assumed to be marked. |
| 442 | Object* immune_begin_; |
| 443 | Object* immune_end_; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 444 | |
| 445 | Object* soft_reference_list_; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 446 | Object* weak_reference_list_; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 447 | Object* finalizer_reference_list_; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 448 | Object* phantom_reference_list_; |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 449 | Object* cleared_reference_list_; |
| 450 | |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 451 | AtomicInteger freed_bytes_; |
| 452 | AtomicInteger freed_objects_; |
| 453 | AtomicInteger class_count_; |
| 454 | AtomicInteger array_count_; |
| 455 | AtomicInteger other_count_; |
| 456 | AtomicInteger large_object_test_; |
| 457 | AtomicInteger large_object_mark_; |
| 458 | AtomicInteger classes_marked_; |
| 459 | AtomicInteger overhead_time_; |
| 460 | AtomicInteger work_chunks_created_; |
| 461 | AtomicInteger work_chunks_deleted_; |
Elliott Hughes | 352a424 | 2011-10-31 15:15:21 -0700 | [diff] [blame] | 462 | |
Mathieu Chartier | 858f1c5 | 2012-10-17 17:45:55 -0700 | [diff] [blame] | 463 | UniquePtr<Barrier> gc_barrier_; |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 464 | Mutex large_object_lock_; |
Mathieu Chartier | 858f1c5 | 2012-10-17 17:45:55 -0700 | [diff] [blame] | 465 | |
Mathieu Chartier | e6e0651 | 2012-06-26 15:00:26 -0700 | [diff] [blame] | 466 | friend class AddIfReachesAllocSpaceVisitor; // Used by mod-union table. |
Mathieu Chartier | cc236d7 | 2012-07-20 10:29:05 -0700 | [diff] [blame] | 467 | friend class CheckBitmapVisitor; |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 468 | friend class CheckObjectVisitor; |
Mathieu Chartier | cc236d7 | 2012-07-20 10:29:05 -0700 | [diff] [blame] | 469 | friend class CheckReferenceVisitor; |
Elliott Hughes | 410c0c8 | 2011-09-01 17:58:25 -0700 | [diff] [blame] | 470 | friend class InternTableEntryIsUnmarked; |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 471 | friend class MarkIfReachesAllocspaceVisitor; |
Mathieu Chartier | cc236d7 | 2012-07-20 10:29:05 -0700 | [diff] [blame] | 472 | friend class ModUnionCheckReferences; |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 473 | friend class ModUnionClearCardVisitor; |
Mathieu Chartier | e6e0651 | 2012-06-26 15:00:26 -0700 | [diff] [blame] | 474 | friend class ModUnionReferenceVisitor; |
Mathieu Chartier | b43b7d4 | 2012-06-19 13:15:09 -0700 | [diff] [blame] | 475 | friend class ModUnionVisitor; |
| 476 | friend class ModUnionTableBitmap; |
Mathieu Chartier | e6e0651 | 2012-06-26 15:00:26 -0700 | [diff] [blame] | 477 | friend class ModUnionTableReferenceCache; |
Mathieu Chartier | cc236d7 | 2012-07-20 10:29:05 -0700 | [diff] [blame] | 478 | friend class ModUnionScanImageRootVisitor; |
| 479 | friend class ScanBitmapVisitor; |
| 480 | friend class ScanImageRootVisitor; |
Mathieu Chartier | 02b6a78 | 2012-10-26 13:51:26 -0700 | [diff] [blame^] | 481 | friend class MarkStackChunk; |
| 482 | friend class FifoMarkStackChunk; |
Elliott Hughes | 410c0c8 | 2011-09-01 17:58:25 -0700 | [diff] [blame] | 483 | |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 484 | DISALLOW_COPY_AND_ASSIGN(MarkSweep); |
| 485 | }; |
| 486 | |
| 487 | } // namespace art |
| 488 | |
| 489 | #endif // ART_SRC_MARK_SWEEP_H_ |