[heap] RecordWrites iterates black object to ensure marking progress.

src/heap/heap.cc

 // 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.
 
 #include "src/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/scopeinfo.h"
 #include "src/base/bits.h"
@@ skipping 1090 matching lines @@
 
   DCHECK(array->map() != fixed_cow_array_map());
   Object** dst_objects = array->data_start() + dst_index;
   MemMove(dst_objects, array->data_start() + src_index, len * kPointerSize);
   if (!InNewSpace(array)) {
     for (int i = 0; i < len; i++) {
       RecordWrite(array, array->OffsetOfElementAt(dst_index + i),
                   dst_objects[i]);
     }
   }
-  incremental_marking()->RecordWrites(array);
+  incremental_marking()->IterateBlackObject(array);
 }
 
 
 #ifdef VERIFY_HEAP
 // Helper class for verifying the string table.
 class StringTableVerifier : public ObjectVisitor {
  public:
   void VisitPointers(Object** start, Object** end) override {
     // Visit all HeapObject pointers in [start, end).
     for (Object** p = start; p < end; p++) {
@@ skipping 3579 matching lines @@
   IteratePromotedObjectsVisitor visitor(this, target, record_slots, callback);
   target->IterateBody(target->map()->instance_type(), size, &visitor);
 
   // When black allocations is on, we have to visit not already marked black
   // objects (in new space) promoted to black pages to keep their references
   // alive.
   // TODO(hpayer): Implement a special promotion visitor that incorporates
   // regular visiting and IteratePromotedObjectPointers.
   if (!was_marked_black) {
     if (incremental_marking()->black_allocation()) {
-      Map* map = target->map();
-      IncrementalMarking::MarkObject(this, map);
+      IncrementalMarking::MarkObject(this, target->map());
+      incremental_marking()->IterateBlackObject(target);
     }
-    incremental_marking()->IterateBlackObject(target);
   }
 }
 
 
 void Heap::IterateRoots(ObjectVisitor* v, VisitMode mode) {
   IterateStrongRoots(v, mode);
   IterateWeakRoots(v, mode);
 }
 
 
@@ skipping 1688 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8