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Side by Side Diff: src/heap/spaces.h

Issue 2356713002: Version 5.5.228.1 (cherry-pick) (Closed)
Patch Set: Created 4 years, 3 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef V8_HEAP_SPACES_H_ 5 #ifndef V8_HEAP_SPACES_H_
6 #define V8_HEAP_SPACES_H_ 6 #define V8_HEAP_SPACES_H_
7 7
8 #include <list> 8 #include <list>
9 #include <memory> 9 #include <memory>
10 #include <unordered_set> 10 #include <unordered_set>
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456 inline SlotSet* old_to_new_slots() { return old_to_new_slots_; } 456 inline SlotSet* old_to_new_slots() { return old_to_new_slots_; }
457 inline SlotSet* old_to_old_slots() { return old_to_old_slots_; } 457 inline SlotSet* old_to_old_slots() { return old_to_old_slots_; }
458 inline TypedSlotSet* typed_old_to_new_slots() { 458 inline TypedSlotSet* typed_old_to_new_slots() {
459 return typed_old_to_new_slots_; 459 return typed_old_to_new_slots_;
460 } 460 }
461 inline TypedSlotSet* typed_old_to_old_slots() { 461 inline TypedSlotSet* typed_old_to_old_slots() {
462 return typed_old_to_old_slots_; 462 return typed_old_to_old_slots_;
463 } 463 }
464 inline LocalArrayBufferTracker* local_tracker() { return local_tracker_; } 464 inline LocalArrayBufferTracker* local_tracker() { return local_tracker_; }
465 465
466 V8_EXPORT_PRIVATE void AllocateOldToNewSlots(); 466 void AllocateOldToNewSlots();
467 void ReleaseOldToNewSlots(); 467 void ReleaseOldToNewSlots();
468 void AllocateOldToOldSlots(); 468 void AllocateOldToOldSlots();
469 void ReleaseOldToOldSlots(); 469 void ReleaseOldToOldSlots();
470 void AllocateTypedOldToNewSlots(); 470 void AllocateTypedOldToNewSlots();
471 void ReleaseTypedOldToNewSlots(); 471 void ReleaseTypedOldToNewSlots();
472 void AllocateTypedOldToOldSlots(); 472 void AllocateTypedOldToOldSlots();
473 void ReleaseTypedOldToOldSlots(); 473 void ReleaseTypedOldToOldSlots();
474 void AllocateLocalTracker(); 474 void AllocateLocalTracker();
475 void ReleaseLocalTracker(); 475 void ReleaseLocalTracker();
476 476
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1423 1423
1424 1424
1425 // ----------------------------------------------------------------------------- 1425 // -----------------------------------------------------------------------------
1426 // Interface for heap object iterator to be implemented by all object space 1426 // Interface for heap object iterator to be implemented by all object space
1427 // object iterators. 1427 // object iterators.
1428 // 1428 //
1429 // NOTE: The space specific object iterators also implements the own next() 1429 // NOTE: The space specific object iterators also implements the own next()
1430 // method which is used to avoid using virtual functions 1430 // method which is used to avoid using virtual functions
1431 // iterating a specific space. 1431 // iterating a specific space.
1432 1432
1433 class V8_EXPORT_PRIVATE ObjectIterator : public Malloced { 1433 class ObjectIterator : public Malloced {
1434 public: 1434 public:
1435 virtual ~ObjectIterator() {} 1435 virtual ~ObjectIterator() {}
1436 virtual HeapObject* Next() = 0; 1436 virtual HeapObject* Next() = 0;
1437 }; 1437 };
1438 1438
1439 template <class PAGE_TYPE> 1439 template <class PAGE_TYPE>
1440 class PageIteratorImpl 1440 class PageIteratorImpl
1441 : public std::iterator<std::forward_iterator_tag, PAGE_TYPE> { 1441 : public std::iterator<std::forward_iterator_tag, PAGE_TYPE> {
1442 public: 1442 public:
1443 explicit PageIteratorImpl(PAGE_TYPE* p) : p_(p) {} 1443 explicit PageIteratorImpl(PAGE_TYPE* p) : p_(p) {}
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1474 1474
1475 // ----------------------------------------------------------------------------- 1475 // -----------------------------------------------------------------------------
1476 // Heap object iterator in new/old/map spaces. 1476 // Heap object iterator in new/old/map spaces.
1477 // 1477 //
1478 // A HeapObjectIterator iterates objects from the bottom of the given space 1478 // A HeapObjectIterator iterates objects from the bottom of the given space
1479 // to its top or from the bottom of the given page to its top. 1479 // to its top or from the bottom of the given page to its top.
1480 // 1480 //
1481 // If objects are allocated in the page during iteration the iterator may 1481 // If objects are allocated in the page during iteration the iterator may
1482 // or may not iterate over those objects. The caller must create a new 1482 // or may not iterate over those objects. The caller must create a new
1483 // iterator in order to be sure to visit these new objects. 1483 // iterator in order to be sure to visit these new objects.
1484 class V8_EXPORT_PRIVATE HeapObjectIterator : public ObjectIterator { 1484 class HeapObjectIterator : public ObjectIterator {
1485 public: 1485 public:
1486 // Creates a new object iterator in a given space. 1486 // Creates a new object iterator in a given space.
1487 explicit HeapObjectIterator(PagedSpace* space); 1487 explicit HeapObjectIterator(PagedSpace* space);
1488 explicit HeapObjectIterator(Page* page); 1488 explicit HeapObjectIterator(Page* page);
1489 1489
1490 // Advance to the next object, skipping free spaces and other fillers and 1490 // Advance to the next object, skipping free spaces and other fillers and
1491 // skipping the special garbage section of which there is one per space. 1491 // skipping the special garbage section of which there is one per space.
1492 // Returns nullptr when the iteration has ended. 1492 // Returns nullptr when the iteration has ended.
1493 inline HeapObject* Next() override; 1493 inline HeapObject* Next() override;
1494 1494
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2942 PageIterator old_iterator_; 2942 PageIterator old_iterator_;
2943 PageIterator code_iterator_; 2943 PageIterator code_iterator_;
2944 PageIterator map_iterator_; 2944 PageIterator map_iterator_;
2945 LargePageIterator lo_iterator_; 2945 LargePageIterator lo_iterator_;
2946 }; 2946 };
2947 2947
2948 } // namespace internal 2948 } // namespace internal
2949 } // namespace v8 2949 } // namespace v8
2950 2950
2951 #endif // V8_HEAP_SPACES_H_ 2951 #endif // V8_HEAP_SPACES_H_
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