[heap] Remove LocalStoreBuffer and add slots in parallel

src/heap/mark-compact.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_MARK_COMPACT_H_
 #define V8_HEAP_MARK_COMPACT_H_
 
 #include "src/base/bits.h"
 #include "src/heap/spaces.h"
 #include "src/heap/store-buffer.h"
 
 namespace v8 {
 namespace internal {
 
 // Callback function, returns whether an object is alive. The heap size
 // of the object is returned in size. It optionally updates the offset
 // to the first live object in the page (only used for old and map objects).
 typedef bool (*IsAliveFunction)(HeapObject* obj, int* size, int* offset);
 
 // Callback function to mark an object in a given heap.
 typedef void (*MarkObjectFunction)(Heap* heap, HeapObject* object);
 
 // Forward declarations.
 class CodeFlusher;
 class MarkCompactCollector;
 class MarkingVisitor;
 class RootMarkingVisitor;
-class LocalSlotsBuffer;
 
 class Marking : public AllStatic {
  public:
   INLINE(static MarkBit MarkBitFrom(Address addr)) {
     MemoryChunk* p = MemoryChunk::FromAddress(addr);
     return p->markbits()->MarkBitFromIndex(p->AddressToMarkbitIndex(addr));
   }
 
   INLINE(static MarkBit MarkBitFrom(HeapObject* obj)) {
     return MarkBitFrom(reinterpret_cast<Address>(obj));
@@ skipping 441 matching lines @@
   void RecordCodeEntrySlot(HeapObject* host, Address slot, Code* target);
   void RecordCodeTargetPatch(Address pc, Code* target);
   INLINE(void RecordSlot(HeapObject* object, Object** slot, Object* target));
   INLINE(void ForceRecordSlot(HeapObject* object, Object** slot,
                               Object* target));
 
   void UpdateSlots(SlotsBuffer* buffer);
   void UpdateSlotsRecordedIn(SlotsBuffer* buffer);
 
   void MigrateObject(HeapObject* dst, HeapObject* src, int size,
-                     AllocationSpace to_old_space,
-                     LocalSlotsBuffer* old_to_old_slots,
-                     LocalSlotsBuffer* old_to_new_slots);
+                     AllocationSpace to_old_space);
 
   void InvalidateCode(Code* code);
 
   void ClearMarkbits();
 
   bool is_compacting() const { return compacting_; }
 
   MarkingParity marking_parity() { return marking_parity_; }
 
   // Concurrent and parallel sweeping support. If required_freed_bytes was set
@@ skipping 301 matching lines @@
   void ReleaseEvacuationCandidates();
 
   // Starts sweeping of a space by contributing on the main thread and setting
   // up other pages for sweeping.
   void StartSweepSpace(PagedSpace* space);
 
   // Finalizes the parallel sweeping phase. Marks all the pages that were
   // swept in parallel.
   void ParallelSweepSpacesComplete();
 
-  // Updates store buffer and slot buffer for a pointer in a migrating object.
-  void RecordMigratedSlot(Object* value, Address slot,
-                          LocalSlotsBuffer* old_to_old_slots,
-                          LocalSlotsBuffer* old_to_new_slots);
-
 #ifdef DEBUG
   friend class MarkObjectVisitor;
   static void VisitObject(HeapObject* obj);
 
   friend class UnmarkObjectVisitor;
   static void UnmarkObject(HeapObject* obj);
 #endif
 
   Heap* heap_;
   base::VirtualMemory* marking_deque_memory_;
@@ skipping 46 matching lines @@
  private:
   MarkCompactCollector* collector_;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_MARK_COMPACT_H_