Introduce extras export 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 1449 matching lines @@
   return CompileNative(isolate, name, source_code, arraysize(args), args);
 }
 
 
 bool Genesis::CompileExtraBuiltin(Isolate* isolate, int index) {
   HandleScope scope(isolate);
   Vector<const char> name = ExtraNatives::GetScriptName(index);
   Handle<String> source_code =
       isolate->bootstrapper()->SourceLookup<ExtraNatives>(index);
   Handle<Object> global = isolate->global_object();
-  Handle<Object> exports = isolate->builtin_exports_object();
+  Handle<Object> exports = isolate->extras_exports_object();
   Handle<Object> args[] = {global, exports};
   return CompileNative(isolate, name, source_code, arraysize(args), args);
 }
 
 
 bool Genesis::CompileNative(Isolate* isolate, Vector<const char> name,
                             Handle<String> source, int argc,
                             Handle<Object> argv[]) {
   SuppressDebug compiling_natives(isolate->debug());
   // During genesis, the boilerplate for stack overflow won't work until the
@@ skipping 430 matching lines @@
 
   native_context()->set_runtime_context(*context);
 
   // Set up shared object to set up cross references between native scripts.
   // "shared" is used for cross references between native scripts that are part
   // of the snapshot. "builtin_exports" is used for experimental natives.
   Handle<JSObject> shared =
       factory()->NewJSObject(isolate()->object_function());
   JSObject::NormalizeProperties(shared, CLEAR_INOBJECT_PROPERTIES, 16,
                                 "container to share between native scripts");
+
   Handle<JSObject> builtin_exports =
       factory()->NewJSObject(isolate()->object_function());
   JSObject::NormalizeProperties(builtin_exports, CLEAR_INOBJECT_PROPERTIES, 16,
                                 "container to export to experimental natives");
   native_context()->set_builtin_exports_object(*builtin_exports);
 
+  Handle<JSObject> extras_exports =
+      factory()->NewJSObject(isolate()->object_function());
+  JSObject::NormalizeProperties(extras_exports, CLEAR_INOBJECT_PROPERTIES, 2,
+                                "container to export to extra natives");
+  native_context()->set_extras_exports_object(*extras_exports);
+
   if (FLAG_expose_natives_as != NULL) {
     Handle<String> shared_key = factory()->NewStringFromAsciiChecked("shared");
     JSObject::AddProperty(builtins, shared_key, shared, NONE);
   }
 
   {  // -- S c r i p t
     // Builtin functions for Script.
     Handle<JSFunction> script_fun = InstallFunction(
         builtins, "Script", JS_VALUE_TYPE, JSValue::kSize,
         isolate()->initial_object_prototype(), Builtins::kIllegal);
@@ skipping 1093 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 } }  // namespace v8::internal