Add an API to create a detached global object

src/factory.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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 1199 matching lines @@
                     arg2);                                                    \
   }
 DEFINE_ERROR(Error, error)
 DEFINE_ERROR(EvalError, eval_error)
 DEFINE_ERROR(RangeError, range_error)
 DEFINE_ERROR(ReferenceError, reference_error)
 DEFINE_ERROR(SyntaxError, syntax_error)
 DEFINE_ERROR(TypeError, type_error)
 #undef DEFINE_ERROR
 
-
 Handle<JSFunction> Factory::NewFunction(Handle<Map> map,
                                         Handle<SharedFunctionInfo> info,
-                                        Handle<Context> context,
+                                        Handle<Object> context_or_undefined,
                                         PretenureFlag pretenure) {
   AllocationSpace space = pretenure == TENURED ? OLD_SPACE : NEW_SPACE;
   Handle<JSFunction> function = New<JSFunction>(map, space);
+  DCHECK(context_or_undefined->IsContext() ||
+         context_or_undefined->IsUndefined(isolate()));
 
   function->initialize_properties();
   function->initialize_elements();
   function->set_shared(*info);
   function->set_code(info->code());
-  function->set_context(*context);
+  function->set_context(*context_or_undefined);
   function->set_prototype_or_initial_map(*the_hole_value());
   function->set_literals(LiteralsArray::cast(*empty_literals_array()));
   function->set_next_function_link(*undefined_value(), SKIP_WRITE_BARRIER);
   isolate()->heap()->InitializeJSObjectBody(*function, *map, JSFunction::kSize);
   return function;
 }
 
 
 Handle<JSFunction> Factory::NewFunction(Handle<Map> map,
                                         Handle<String> name,
@@ skipping 112 matching lines @@
     Handle<Context> context,
     PretenureFlag pretenure) {
   int map_index =
       Context::FunctionMapIndex(info->language_mode(), info->kind());
   Handle<Map> initial_map(Map::cast(context->native_context()->get(map_index)));
 
   return NewFunctionFromSharedFunctionInfo(initial_map, info, context,
                                            pretenure);
 }
 
-
 Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
     Handle<Map> initial_map, Handle<SharedFunctionInfo> info,
-    Handle<Context> context, PretenureFlag pretenure) {
+    Handle<Object> context_or_undefined, PretenureFlag pretenure) {
   DCHECK_EQ(JS_FUNCTION_TYPE, initial_map->instance_type());
   Handle<JSFunction> result =
-      NewFunction(initial_map, info, context, pretenure);
+      NewFunction(initial_map, info, context_or_undefined, pretenure);
 
   if (info->ic_age() != isolate()->heap()->global_ic_age()) {
     info->ResetForNewContext(isolate()->heap()->global_ic_age());
   }
 
-  // Give compiler a chance to pre-initialize.
-  Compiler::PostInstantiation(result, pretenure);
+  if (context_or_undefined->IsContext()) {
+    // Give compiler a chance to pre-initialize.
+    Compiler::PostInstantiation(result, pretenure);
+  }
 
   return result;
 }
 
 
 Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
   Handle<FixedArray> array = NewFixedArray(length, TENURED);
   array->set_map_no_write_barrier(*scope_info_map());
   Handle<ScopeInfo> scope_info = Handle<ScopeInfo>::cast(array);
   return scope_info;
@@ skipping 988 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8