[modules] Basic support of exports

src/runtime/runtime-scopes.cc

Index: src/runtime/runtime-scopes.cc
diff --git a/src/runtime/runtime-scopes.cc b/src/runtime/runtime-scopes.cc
index c80ec91b539686f53e9c3cb55ad4da53138c0ea1..c0b7efe1dca13d53843a6a3d5423764817baf381 100644
--- a/src/runtime/runtime-scopes.cc
+++ b/src/runtime/runtime-scopes.cc
@@ -699,6 +699,19 @@ RUNTIME_FUNCTION(Runtime_PushWithContext) {
   return *context;
 }
 
+RUNTIME_FUNCTION(Runtime_PushModuleContext) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(3, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSModule, module, 0);
+  CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 1);
+  CONVERT_ARG_HANDLE_CHECKED(ScopeInfo, scope_info, 2);
+  DCHECK(function->context() == isolate->context());
+
+  Handle<Context> context =
+      isolate->factory()->NewModuleContext(module, function, scope_info);
+  isolate->set_context(*context);
+  return *context;
+}
 
 RUNTIME_FUNCTION(Runtime_PushCatchContext) {
   HandleScope scope(isolate);