Add the concept of a V8 extras exports object

src/bootstrapper.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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/code-stubs.h"
@@ skipping 183 matching lines @@
                          Handle<JSGlobalProxy> global_proxy);
   // Similarly, we want to use the global that has been created by the templates
   // passed through the API.  The global from the snapshot is detached from the
   // other objects in the snapshot.
   void HookUpGlobalObject(Handle<GlobalObject> global_object,
                           Handle<FixedArray> outdated_contexts);
   // New context initialization.  Used for creating a context from scratch.
   void InitializeGlobal(Handle<GlobalObject> global_object,
                         Handle<JSFunction> empty_function);
   void InitializeExperimentalGlobal();
+  void InitializeExtrasExportsObject();
   // Installs the contents of the native .js files on the global objects.
   // Used for creating a context from scratch.
   void InstallNativeFunctions();
   void InstallExperimentalNativeFunctions();
   // Typed arrays are not serializable and have to initialized afterwards.
   void InitializeBuiltinTypedArrays();
 
 #define DECLARE_FEATURE_INITIALIZATION(id, descr) \
   void InstallNativeFunctions_##id();             \
   void InitializeGlobal_##id();
@@ skipping 1220 matching lines @@
 void Genesis::InitializeExperimentalGlobal() {
 #define FEATURE_INITIALIZE_GLOBAL(id, descr) InitializeGlobal_##id();
 
   HARMONY_INPROGRESS(FEATURE_INITIALIZE_GLOBAL)
   HARMONY_STAGED(FEATURE_INITIALIZE_GLOBAL)
   HARMONY_SHIPPING(FEATURE_INITIALIZE_GLOBAL)
 #undef FEATURE_INITIALIZE_GLOBAL
 }
 
 
+void Genesis::InitializeExtrasExportsObject() {
+  Handle<JSObject> exports =
+      factory()->NewJSObject(isolate()->object_function(), TENURED);
+
+  native_context()->set_extras_exports_object(*exports);
+
+  Handle<JSBuiltinsObject> builtins(native_context()->builtins());
+  Handle<String> exports_string =
+      factory()->InternalizeOneByteString(STATIC_CHAR_VECTOR("extrasExports"));
+  Runtime::SetObjectProperty(isolate(), builtins, exports_string, exports,
+                             STRICT).Assert();
+}
+
+
 bool Genesis::CompileBuiltin(Isolate* isolate, int index) {
   Vector<const char> name = Natives::GetScriptName(index);
   Handle<String> source_code =
       isolate->bootstrapper()->SourceLookup<Natives>(index);
   return CompileNative(isolate, name, source_code);
 }
 
 
 bool Genesis::CompileExperimentalBuiltin(Isolate* isolate, int index) {
   Vector<const char> name = ExperimentalNatives::GetScriptName(index);
@@ skipping 1501 matching lines @@
 
     if (!ConfigureGlobalObjects(global_proxy_template)) return;
     isolate->counters()->contexts_created_from_scratch()->Increment();
   }
 
   // Install experimental and extra natives. Do not include them into the
   // snapshot as we should be able to turn them off at runtime. Re-installing
   // them after they have already been deserialized would also fail.
   if (!isolate->serializer_enabled()) {
     InitializeExperimentalGlobal();
+    InitializeExtrasExportsObject();
     if (!InstallExperimentalNatives()) return;
     if (!InstallExtraNatives()) return;
   }
 
   // The serializer cannot serialize typed arrays. Reset those typed arrays
   // for each new context.
   InitializeBuiltinTypedArrays();
 
   result_ = native_context();
 }
@@ skipping 21 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 } }  // namespace v8::internal