[modules] Basic support of exports

src/runtime/runtime-object.cc

 // Copyright 2014 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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/isolate-inl.h"
@@ skipping 910 matching lines @@
   bool success;
   LookupIterator it = LookupIterator::PropertyOrElement(
       isolate, o, key, &success, LookupIterator::OWN);
   if (!success) return isolate->heap()->exception();
   MAYBE_RETURN(
       JSReceiver::CreateDataProperty(&it, value, Object::THROW_ON_ERROR),
       isolate->heap()->exception());
   return *value;
 }
 
+RUNTIME_FUNCTION(Runtime_LoadModuleExport) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
+  Handle<JSModule> module(isolate->context()->module());
+  return *JSModule::LoadExport(module, name);
+}
+
+RUNTIME_FUNCTION(Runtime_StoreModuleExport) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 2);
+  CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
+  Handle<JSModule> module(isolate->context()->module());
+  JSModule::StoreExport(module, name, value);
+  return isolate->heap()->undefined_value();
+}
+
 }  // namespace internal
 }  // namespace v8