Allow property indexes to refer to slots inside the object header.

src/bootstrapper.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1066 matching lines @@
                                factory->undefined_value(), DONT_ENUM));
     CHECK_NOT_EMPTY_HANDLE(isolate,
                            JSObject::SetLocalPropertyIgnoreAttributes(
                                result, factory->callee_symbol(),
                                factory->undefined_value(), DONT_ENUM));
 
 #ifdef DEBUG
     LookupResult lookup(isolate);
     result->LocalLookup(heap->callee_symbol(), &lookup);
     ASSERT(lookup.IsField());
-    ASSERT(lookup.GetFieldIndex() == Heap::kArgumentsCalleeIndex);
+    ASSERT(lookup.GetFieldIndex().FieldIndex() == Heap::kArgumentsCalleeIndex);
 
     result->LocalLookup(heap->length_symbol(), &lookup);
     ASSERT(lookup.IsField());
-    ASSERT(lookup.GetFieldIndex() == Heap::kArgumentsLengthIndex);
+    ASSERT(lookup.GetFieldIndex().FieldIndex() == Heap::kArgumentsLengthIndex);
 
     ASSERT(result->map()->inobject_properties() > Heap::kArgumentsCalleeIndex);
     ASSERT(result->map()->inobject_properties() > Heap::kArgumentsLengthIndex);
 
     // Check the state of the object.
     ASSERT(result->HasFastProperties());
     ASSERT(result->HasFastObjectElements());
 #endif
   }
 
@@ skipping 77 matching lines @@
     // Add length property only for strict mode boilerplate.
     CHECK_NOT_EMPTY_HANDLE(isolate,
                            JSObject::SetLocalPropertyIgnoreAttributes(
                                result, factory->length_symbol(),
                                factory->undefined_value(), DONT_ENUM));
 
 #ifdef DEBUG
     LookupResult lookup(isolate);
     result->LocalLookup(heap->length_symbol(), &lookup);
     ASSERT(lookup.IsField());
-    ASSERT(lookup.GetFieldIndex() == Heap::kArgumentsLengthIndex);
+    ASSERT(lookup.GetFieldIndex().FieldIndex() == Heap::kArgumentsLengthIndex);
 
     ASSERT(result->map()->inobject_properties() > Heap::kArgumentsLengthIndex);
 
     // Check the state of the object.
     ASSERT(result->HasFastProperties());
     ASSERT(result->HasFastObjectElements());
 #endif
   }
 
   {  // --- context extension
@@ skipping 1209 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   ASSERT(!IsActive());
 }
 
 } }  // namespace v8::internal