[builtins] Add receiver to builtin exit frames

src/messages.cc

 // Copyright 2011 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/messages.h"
 
 #include "src/api.h"
 #include "src/execution.h"
 #include "src/isolate-inl.h"
 #include "src/keys.h"
@@ skipping 336 matching lines @@
 bool CallSite::IsEval() {
   if (!IsJavaScript()) return false;
   Handle<Object> script(fun_->shared()->script(), isolate_);
   return script->IsScript() &&
          Handle<Script>::cast(script)->compilation_type() ==
              Script::COMPILATION_TYPE_EVAL;
 }
 
 
 bool CallSite::IsConstructor() {
+  // Builtin exit frames mark constructors by passing a special symbol as the
+  // receiver.
+  Object* ctor_symbol = isolate_->heap()->call_site_constructor_symbol();
+  if (*receiver_ == ctor_symbol) return true;
   if (!IsJavaScript() || !receiver_->IsJSObject()) return false;
   Handle<Object> constructor =
       JSReceiver::GetDataProperty(Handle<JSObject>::cast(receiver_),
                                   isolate_->factory()->constructor_string());
   return constructor.is_identical_to(fun_);
 }
 
 
 Handle<String> MessageTemplate::FormatMessage(Isolate* isolate,
                                               int template_index,
@@ skipping 72 matching lines @@
       builder.AppendCharacter(*c);
     }
   }
 
   return builder.Finish();
 }
 
 
 }  // namespace internal
 }  // namespace v8