[modules] Expand API to allow linking and use it in d8

src/objects.h

 // Copyright 2015 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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 7876 matching lines @@
   // on whether it's been instantiated.
   DECL_ACCESSORS(code, Object)
 
   DECL_ACCESSORS(exports, ObjectHashTable)
 
   // [[RequestedModules]]: Modules imported or re-exported by this module.
   // Corresponds 1-to-1 to the module specifier strings in
   // ModuleInfo::module_requests.
   DECL_ACCESSORS(requested_modules, FixedArray)
 
+  // [[Evaluated]]: Whether this module has been evaluated. Modules
+  // are only evaluated a single time.
+  DECL_BOOLEAN_ACCESSORS(evaluated)
+
+  // Storage for [[Evaluated]]
+  DECL_INT_ACCESSORS(flags)
+
   static void CreateExport(Handle<Module> module, Handle<String> name);
   static void StoreExport(Handle<Module> module, Handle<String> name,
                           Handle<Object> value);
   static Handle<Object> LoadExport(Handle<Module> module, Handle<String> name);
 
   static const int kCodeOffset = HeapObject::kHeaderSize;
   static const int kExportsOffset = kCodeOffset + kPointerSize;
   static const int kRequestedModulesOffset = kExportsOffset + kPointerSize;
-  static const int kSize = kRequestedModulesOffset + kPointerSize;
+  static const int kFlagsOffset = kRequestedModulesOffset + kPointerSize;
+  static const int kSize = kFlagsOffset + kPointerSize;
 
  private:
+  enum { kEvaluatedBit };
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(Module);
 };
 
 // JSBoundFunction describes a bound function exotic object.
 class JSBoundFunction : public JSObject {
  public:
   // [bound_target_function]: The wrapped function object.
   DECL_ACCESSORS(bound_target_function, JSReceiver)
 
   // [bound_this]: The value that is always passed as the this value when
@@ skipping 3404 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_