[heap] fix crash during the scavenge of ArrayBuffer

src/heap/heap.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_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
@@ skipping 1233 matching lines @@
   // Iterates over all strong roots in the heap.
   void IterateStrongRoots(ObjectVisitor* v, VisitMode mode);
   // Iterates over entries in the smi roots list.  Only interesting to the
   // serializer/deserializer, since GC does not care about smis.
   void IterateSmiRoots(ObjectVisitor* v);
   // Iterates over all the other roots in the heap.
   void IterateWeakRoots(ObjectVisitor* v, VisitMode mode);
 
   // Iterate pointers to from semispace of new space found in memory interval
   // from start to end within |object|.
+  void IteratePointersToFromSpace(HeapObject* target, int size,

[Michael Starzinger, 2015/10/27 18:20:43]

Really? Between the comment that talks about "object", "start" and "end" and the
function with the signature containing arguments called "object", "start" and
"end" seemed like the best place to put this?

[fedor.indutny, 2015/10/27 18:22:42]

Gosh, this was an awful place to put the function indeed, but I think it should
be around this place anyway.

+                                  ObjectSlotCallback callback);
+
   void IterateAndMarkPointersToFromSpace(HeapObject* object, Address start,
                                          Address end, bool record_slots,
                                          ObjectSlotCallback callback);
 
   // ===========================================================================
   // Store buffer API. =========================================================
   // ===========================================================================
 
   // Write barrier support for address[offset] = o.
   INLINE(void RecordWrite(Address address, int offset));
@@ skipping 1467 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_H_