Add CHECKs when updating pointers from the slots and store buffers

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/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
@@ skipping 2394 matching lines @@
     }
   }
 }
 
 
 void Heap::ScavengeObjectSlow(HeapObject** p, HeapObject* object) {
   SLOW_DCHECK(object->GetIsolate()->heap()->InFromSpace(object));
   MapWord first_word = object->map_word();
   SLOW_DCHECK(!first_word.IsForwardingAddress());
   Map* map = first_word.ToMap();
+  // TODO(jochen): Remove again after fixing http://crbug.com/452095
+  CHECK((*p)->IsHeapObject() == object->IsHeapObject());
   map->GetHeap()->DoScavengeObject(map, p, object);
 }
 
 
 void Heap::ConfigureInitialOldGenerationSize() {
   if (!old_generation_size_configured_ && tracer()->SurvivalEventsRecorded()) {
     old_generation_allocation_limit_ =
         Max(kMinimumOldGenerationAllocationLimit,
             static_cast<intptr_t>(
                 static_cast<double>(old_generation_allocation_limit_) *
@@ skipping 3965 matching lines @@
       static_cast<int>(object_sizes_last_time_[index]));
   CODE_AGE_LIST_COMPLETE(ADJUST_LAST_TIME_OBJECT_COUNT)
 #undef ADJUST_LAST_TIME_OBJECT_COUNT
 
   MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
   MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
   ClearObjectStats();
 }
 }
 }  // namespace v8::internal