[modules] Basic support of exports

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index 7908c6295ce082e5412f16f19d1a57ed2c9ff330..59be2b0f271b7be3379ed9d9d3378af76d4440d2 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -928,5 +928,23 @@ RUNTIME_FUNCTION(Runtime_CreateDataProperty) {
   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