[modules] Basic support of exports

src/runtime/runtime-scopes.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 <memory>
 
 #include "src/accessors.h"
 #include "src/arguments.h"
@@ skipping 199 matching lines @@
 }
 
 namespace {
 
 Object* DeclareEvalHelper(Isolate* isolate, Handle<String> name,
                           Handle<Object> value) {
   // Declarations are always made in a function, native, or script context, or
   // a declaration block scope. Since this is called from eval, the context
   // passed is the context of the caller, which may be some nested context and
   // not the declaration context.
+  // XXX module context???
   Handle<Context> context_arg(isolate->context(), isolate);
   Handle<Context> context(context_arg->declaration_context(), isolate);
 
   DCHECK(context->IsFunctionContext() || context->IsNativeContext() ||
          context->IsScriptContext() ||
          (context->IsBlockContext() && context->has_extension()));
 
   bool is_function = value->IsJSFunction();
   bool is_var = !is_function;
   DCHECK(!is_var || value->IsUndefined(isolate));
@@ skipping 462 matching lines @@
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, extension_object, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 1);
   Handle<Context> current(isolate->context());
   Handle<Context> context =
       isolate->factory()->NewWithContext(function, current, extension_object);
   isolate->set_context(*context);
   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);
   DCHECK_EQ(3, args.length());
   CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, thrown_object, 1);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 2);
   Handle<Context> current(isolate->context());
   Handle<Context> context = isolate->factory()->NewCatchContext(
       function, current, name, thrown_object);
@@ skipping 219 matching lines @@
 RUNTIME_FUNCTION(Runtime_StoreLookupSlot_Strict) {
   HandleScope scope(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
   RETURN_RESULT_OR_FAILURE(isolate, StoreLookupSlot(name, value, STRICT));
 }
 
 }  // namespace internal
 }  // namespace v8