ES6: Desugaring of instanceof to support @@hasInstance

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/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
@@ skipping 1143 matching lines @@
         JSObject::kHeaderSize, MaybeHandle<JSObject>(),
         Builtins::kFunctionHasInstance,
         static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY));
 
     // Set the expected parameters for @@hasInstance to 1; required by builtin.
     has_instance->shared()->set_internal_formal_parameter_count(1);
 
     // Set the length for the function to satisfy ECMA-262.
     has_instance->shared()->set_length(1);
 
+    // Install in the native context
+    native_context()->set_ordinary_has_instance(*has_instance);
+
     // Install the "constructor" property on the %FunctionPrototype%.
     JSObject::AddProperty(prototype, factory->constructor_string(),
                           function_fun, DONT_ENUM);
 
     sloppy_function_map_writable_prototype_->SetConstructor(*function_fun);
     strict_function_map_writable_prototype_->SetConstructor(*function_fun);
     native_context()->strong_function_map()->SetConstructor(*function_fun);
   }
 
   {  // --- A r r a y ---
@@ skipping 1308 matching lines @@
       JSGlobalObject::cast(native_context()->global_object()));
   Isolate* isolate = global->GetIsolate();
   Factory* factory = isolate->factory();
 
   Handle<JSFunction> object_function = isolate->object_function();
   SimpleInstallFunction(object_function,
                         factory->getOwnPropertyDescriptors_string(),
                         Builtins::kObjectGetOwnPropertyDescriptors, 1, false);
 }
 
+void Genesis::InitializeGlobal_harmony_instanceof() {

[rossberg, 2016/02/12 14:11:31]

Use the EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE macro, see lines 2324+

[mvstanton, 2016/02/18 02:12:17]

Done.

+  if (!FLAG_harmony_instanceof) return;
+}
+
 void Genesis::InstallJSProxyMaps() {
   // Allocate the different maps for all Proxy types.
   // Next to the default proxy, we need maps indicating callable and
   // constructable proxies.
 
   Handle<Map> proxy_function_map =
       Map::Copy(isolate()->sloppy_function_without_prototype_map(), "Proxy");
   proxy_function_map->set_is_constructor(true);
   native_context()->set_proxy_function_map(*proxy_function_map);
 
@@ skipping 467 matching lines @@
   static const char* harmony_destructuring_assignment_natives[] = {nullptr};
   static const char* harmony_object_observe_natives[] = {
       "native harmony-object-observe.js", nullptr};
   static const char* harmony_sharedarraybuffer_natives[] = {
       "native harmony-sharedarraybuffer.js", "native harmony-atomics.js", NULL};
   static const char* harmony_simd_natives[] = {"native harmony-simd.js",
                                                nullptr};
   static const char* harmony_do_expressions_natives[] = {nullptr};
   static const char* harmony_regexp_subclass_natives[] = {nullptr};
   static const char* harmony_regexp_lookbehind_natives[] = {nullptr};
+  static const char* harmony_instanceof_natives[] = {nullptr};
   static const char* harmony_regexp_property_natives[] = {nullptr};
   static const char* harmony_function_name_natives[] = {nullptr};
   static const char* harmony_function_sent_natives[] = {nullptr};
   static const char* promise_extra_natives[] = {"native promise-extra.js",
                                                 nullptr};
   static const char* harmony_object_values_entries_natives[] = {nullptr};
   static const char* harmony_object_own_property_descriptors_natives[] = {
       nullptr};
 
   for (int i = ExperimentalNatives::GetDebuggerCount();
@@ skipping 662 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8