Ensure double alignment when deserializing.

src/objects-debug.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/disasm.h"
 #include "src/disassembler.h"
 #include "src/heap/objects-visiting.h"
 #include "src/jsregexp.h"
@@ skipping 29 matching lines @@
 
 
 void HeapObject::HeapObjectVerify() {
   InstanceType instance_type = map()->instance_type();
 
   if (instance_type < FIRST_NONSTRING_TYPE) {
     String::cast(this)->StringVerify();
     return;
   }
 
+  // TODO(yangguo): Use this check once crbug/436911 has been fixed.
+  //  DCHECK(!NeedsToEnsureDoubleAlignment() ||
+  //         IsAligned(OffsetFrom(address()), kDoubleAlignment));
+
   switch (instance_type) {
     case SYMBOL_TYPE:
       Symbol::cast(this)->SymbolVerify();
       break;
     case MAP_TYPE:
       Map::cast(this)->MapVerify();
       break;
     case HEAP_NUMBER_TYPE:
     case MUTABLE_HEAP_NUMBER_TYPE:
       HeapNumber::cast(this)->HeapNumberVerify();
@@ skipping 1198 matching lines @@
     while (map != heap->roots_array_start()[i++]) {
       CHECK_LT(i, Heap::kStrongRootListLength);
     }
   }
 }
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal