Reload length of retained_maps array after GC.

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 5595 matching lines @@
   if (dep->IsDependentCode()) return DependentCode::cast(dep);
   return DependentCode::cast(empty_fixed_array());
 }
 
 
 void Heap::AddRetainedMap(Handle<Map> map) {
   if (FLAG_retain_maps_for_n_gc == 0) return;
   Handle<WeakCell> cell = Map::WeakCellForMap(map);
   Handle<ArrayList> array(retained_maps(), isolate());
   array = ArrayList::Add(
-      array, cell, handle(Smi::FromInt(FLAG_retain_maps_for_n_gc), isolate()));
+      array, cell, handle(Smi::FromInt(FLAG_retain_maps_for_n_gc), isolate()),
+      ArrayList::kReloadLengthAfterAllocation);
   if (*array != retained_maps()) {
     set_retained_maps(*array);
   }
 }
 
 
 void Heap::FatalProcessOutOfMemory(const char* location, bool take_snapshot) {
   v8::internal::V8::FatalProcessOutOfMemory(location, take_snapshot);
 }
 
@@ skipping 762 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