[heap] Reland concurrent store buffer processing.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index fd44ff2c97129d275da39f7b6667ff07e94fca68..1527228147ead5d29a2e61a33bbf066c24f3d719 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -439,7 +439,7 @@ void Heap::GarbageCollectionPrologue() {
   }
   CheckNewSpaceExpansionCriteria();
   UpdateNewSpaceAllocationCounter();
-  store_buffer()->MoveEntriesToRememberedSet();
+  store_buffer()->MoveAllEntriesToRememberedSet();
 }
 
 
@@ -5874,10 +5874,10 @@ void Heap::CheckHandleCount() {
 
 void Heap::ClearRecordedSlot(HeapObject* object, Object** slot) {
   if (!InNewSpace(object)) {
-    store_buffer()->MoveEntriesToRememberedSet();
     Address slot_addr = reinterpret_cast<Address>(slot);
     Page* page = Page::FromAddress(slot_addr);
     DCHECK_EQ(page->owner()->identity(), OLD_SPACE);
+    store_buffer()->MoveAllEntriesToRememberedSet();
     RememberedSet<OLD_TO_NEW>::Remove(page, slot_addr);
     RememberedSet<OLD_TO_OLD>::Remove(page, slot_addr);
   }
@@ -5886,8 +5886,8 @@ void Heap::ClearRecordedSlot(HeapObject* object, Object** slot) {
 void Heap::ClearRecordedSlotRange(Address start, Address end) {
   Page* page = Page::FromAddress(start);
   if (!page->InNewSpace()) {
-    store_buffer()->MoveEntriesToRememberedSet();
     DCHECK_EQ(page->owner()->identity(), OLD_SPACE);
+    store_buffer()->MoveAllEntriesToRememberedSet();
     RememberedSet<OLD_TO_NEW>::RemoveRange(page, start, end,
                                            SlotSet::PREFREE_EMPTY_BUCKETS);
     RememberedSet<OLD_TO_OLD>::RemoveRange(page, start, end,