[heap] Black allocation.

src/heap/remembered-set.cc

 // Copyright 2016 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.
 
 #include "src/heap/remembered-set.h"
 #include "src/heap/heap-inl.h"
 #include "src/heap/heap.h"
 #include "src/heap/mark-compact.h"
 #include "src/heap/slot-set.h"
 #include "src/heap/spaces.h"
@@ skipping 24 matching lines @@
   Iterate(heap, [heap](Address addr) {
     HeapObject* obj =
         heap->mark_compact_collector()->FindBlackObjectBySlotSlow(addr);
     if (obj == nullptr) {
       // The slot is in dead object.
       MemoryChunk* chunk = MemoryChunk::FromAnyPointerAddress(heap, addr);
       AllocationSpace owner = chunk->owner()->identity();
       // The old to old remembered set should not have dead slots.
       CHECK_NE(direction, OLD_TO_OLD);
       // The old to new remembered set is allowed to have slots in dead
-      // objects only in map and large object space because these spaces cannot
-      // have raw untaged pointers.
+      // objects only in map and large object space because these space
+      // cannot have raw untagged pointers.
       CHECK(owner == MAP_SPACE || owner == LO_SPACE);
     } else {
       int offset = static_cast<int>(addr - obj->address());
       CHECK(obj->IsValidSlot(offset));
     }
     return KEEP_SLOT;
   });
 }
 
 template <PointerDirection direction>
@@ skipping 10 matching lines @@
          heap->mark_compact_collector()->IsSlotInLiveObject(
              reinterpret_cast<Address>(slot));
 }
 
 template void RememberedSet<OLD_TO_NEW>::ClearInvalidSlots(Heap* heap);
 template void RememberedSet<OLD_TO_NEW>::VerifyValidSlots(Heap* heap);
 template void RememberedSet<OLD_TO_OLD>::VerifyValidSlots(Heap* heap);
 
 }  // namespace internal
 }  // namespace v8