src/v8/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/api.h"
#include "src/base/ieee754.h"
#include "src/code-stubs.h"
#include "src/compiler.h"
#include "src/debug/debug.h"
#include "src/extensions/externalize-string-extension.h"
#include "src/extensions/free-buffer-extension.h"
#include "src/extensions/gc-extension.h"
#include "src/extensions/ignition-statistics-extension.h"
#include "src/extensions/statistics-extension.h"
#include "src/extensions/trigger-failure-extension.h"
#include "src/heap/heap.h"
#include "src/isolate-inl.h"
#include "src/objects/js-regexp.h"
#include "src/snapshot/natives.h"
#include "src/snapshot/snapshot.h"
#include "src/wasm/wasm-js.h"

#if V8_INTL_SUPPORT
#include "src/objects/intl-objects.h"
#endif  // V8_INTL_SUPPORT

#if V8_OS_STARBOARD
#include "src/poems.h"
#endif

namespace v8 {
namespace internal {

void SourceCodeCache::Initialize(Isolate* isolate, bool create_heap_objects) {
  cache_ = create_heap_objects ? isolate->heap()->empty_fixed_array() : nullptr;
}

bool SourceCodeCache::Lookup(Vector<const char> name,
                             Handle<SharedFunctionInfo>* handle) {
  for (int i = 0; i < cache_->length(); i += 2) {
    SeqOneByteString* str = SeqOneByteString::cast(cache_->get(i));
    if (str->IsUtf8EqualTo(name)) {
      *handle = Handle<SharedFunctionInfo>(
          SharedFunctionInfo::cast(cache_->get(i + 1)));
      return true;
    }
  }
  return false;
}

void SourceCodeCache::Add(Vector<const char> name,
                          Handle<SharedFunctionInfo> shared) {
  Isolate* isolate = shared->GetIsolate();
  Factory* factory = isolate->factory();
  HandleScope scope(isolate);
  int length = cache_->length();
  Handle<FixedArray> new_array = factory->NewFixedArray(length + 2, TENURED);
  cache_->CopyTo(0, *new_array, 0, cache_->length());
  cache_ = *new_array;
  Handle<String> str =
      factory->NewStringFromOneByte(Vector<const uint8_t>::cast(name), TENURED)
          .ToHandleChecked();
  DCHECK(!str.is_null());
  cache_->set(length, *str);
  cache_->set(length + 1, *shared);
  Script::cast(shared->script())->set_type(type_);
}

Bootstrapper::Bootstrapper(Isolate* isolate)
    : isolate_(isolate),
      nesting_(0),
      extensions_cache_(Script::TYPE_EXTENSION) {}

Handle<String> Bootstrapper::GetNativeSource(NativeType type, int index) {
  NativesExternalStringResource* resource =
      new NativesExternalStringResource(type, index);
  Handle<ExternalOneByteString> source_code =
      isolate_->factory()->NewNativeSourceString(resource);
  isolate_->heap()->RegisterExternalString(*source_code);
  DCHECK(source_code->is_short());
  return source_code;
}

void Bootstrapper::Initialize(bool create_heap_objects) {
  extensions_cache_.Initialize(isolate_, create_heap_objects);
}


static const char* GCFunctionName() {
  bool flag_given =
      FLAG_expose_gc_as != nullptr && strlen(FLAG_expose_gc_as) != 0;
  return flag_given ? FLAG_expose_gc_as : "gc";
}

v8::Extension* Bootstrapper::free_buffer_extension_ = nullptr;
v8::Extension* Bootstrapper::gc_extension_ = nullptr;
v8::Extension* Bootstrapper::externalize_string_extension_ = nullptr;
v8::Extension* Bootstrapper::statistics_extension_ = nullptr;
v8::Extension* Bootstrapper::trigger_failure_extension_ = nullptr;
v8::Extension* Bootstrapper::ignition_statistics_extension_ = nullptr;

void Bootstrapper::InitializeOncePerProcess() {
  free_buffer_extension_ = new FreeBufferExtension;
  v8::RegisterExtension(free_buffer_extension_);
  gc_extension_ = new GCExtension(GCFunctionName());
  v8::RegisterExtension(gc_extension_);
  externalize_string_extension_ = new ExternalizeStringExtension;
  v8::RegisterExtension(externalize_string_extension_);
  statistics_extension_ = new StatisticsExtension;
  v8::RegisterExtension(statistics_extension_);
  trigger_failure_extension_ = new TriggerFailureExtension;
  v8::RegisterExtension(trigger_failure_extension_);
  ignition_statistics_extension_ = new IgnitionStatisticsExtension;
  v8::RegisterExtension(ignition_statistics_extension_);
}


void Bootstrapper::TearDownExtensions() {
  delete free_buffer_extension_;
  free_buffer_extension_ = nullptr;
  delete gc_extension_;
  gc_extension_ = nullptr;
  delete externalize_string_extension_;
  externalize_string_extension_ = nullptr;
  delete statistics_extension_;
  statistics_extension_ = nullptr;
  delete trigger_failure_extension_;
  trigger_failure_extension_ = nullptr;
  delete ignition_statistics_extension_;
  ignition_statistics_extension_ = nullptr;
}

void Bootstrapper::TearDown() {
  extensions_cache_.Initialize(isolate_, false);  // Yes, symmetrical
}


class Genesis BASE_EMBEDDED {
 public:
  Genesis(Isolate* isolate, MaybeHandle<JSGlobalProxy> maybe_global_proxy,
          v8::Local<v8::ObjectTemplate> global_proxy_template,
          size_t context_snapshot_index,
          v8::DeserializeEmbedderFieldsCallback embedder_fields_deserializer,
          GlobalContextType context_type);
  Genesis(Isolate* isolate, MaybeHandle<JSGlobalProxy> maybe_global_proxy,
          v8::Local<v8::ObjectTemplate> global_proxy_template);
  ~Genesis() { }

  Isolate* isolate() const { return isolate_; }
  Factory* factory() const { return isolate_->factory(); }
  Builtins* builtins() const { return isolate_->builtins(); }
  Heap* heap() const { return isolate_->heap(); }

  Handle<Context> result() { return result_; }

  Handle<JSGlobalProxy> global_proxy() { return global_proxy_; }

 private:
  Handle<Context> native_context() { return native_context_; }

  // Creates some basic objects. Used for creating a context from scratch.
  void CreateRoots();
  // Creates the empty function.  Used for creating a context from scratch.
  Handle<JSFunction> CreateEmptyFunction(Isolate* isolate);
  // Returns the %ThrowTypeError% intrinsic function.
  // See ES#sec-%throwtypeerror% for details.
  Handle<JSFunction> GetThrowTypeErrorIntrinsic();

  void CreateSloppyModeFunctionMaps(Handle<JSFunction> empty);
  void CreateStrictModeFunctionMaps(Handle<JSFunction> empty);
  void CreateObjectFunction(Handle<JSFunction> empty);
  void CreateIteratorMaps(Handle<JSFunction> empty);
  void CreateAsyncIteratorMaps(Handle<JSFunction> empty);
  void CreateAsyncFunctionMaps(Handle<JSFunction> empty);
  void CreateJSProxyMaps();

  // Make the "arguments" and "caller" properties throw a TypeError on access.
  void AddRestrictedFunctionProperties(Handle<JSFunction> empty);

  // Creates the global objects using the global proxy and the template passed
  // in through the API.  We call this regardless of whether we are building a
  // context from scratch or using a deserialized one from the partial snapshot
  // but in the latter case we don't use the objects it produces directly, as
  // we have to use the deserialized ones that are linked together with the
  // rest of the context snapshot. At the end we link the global proxy and the
  // context to each other.
  Handle<JSGlobalObject> CreateNewGlobals(
      v8::Local<v8::ObjectTemplate> global_proxy_template,
      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<JSGlobalObject> global_object);
  // Hooks the given global proxy into the context in the case we do not
  // replace the global object from the deserialized native context.
  void HookUpGlobalProxy(Handle<JSGlobalProxy> global_proxy);
  // The native context has a ScriptContextTable that store declarative bindings
  // made in script scopes.  Add a "this" binding to that table pointing to the
  // global proxy.
  void InstallGlobalThisBinding();
  // New context initialization.  Used for creating a context from scratch.
  void InitializeGlobal(Handle<JSGlobalObject> global_object,
                        Handle<JSFunction> empty_function,
                        GlobalContextType context_type);
  void InitializeExperimentalGlobal();
  // Depending on the situation, expose and/or get rid of the utils object.
  void ConfigureUtilsObject(GlobalContextType context_type);

#define DECLARE_FEATURE_INITIALIZATION(id, descr) \
  void InitializeGlobal_##id();

  HARMONY_INPROGRESS(DECLARE_FEATURE_INITIALIZATION)
  HARMONY_STAGED(DECLARE_FEATURE_INITIALIZATION)
  HARMONY_SHIPPING(DECLARE_FEATURE_INITIALIZATION)
#undef DECLARE_FEATURE_INITIALIZATION

  enum ArrayBufferKind {
    ARRAY_BUFFER,
    SHARED_ARRAY_BUFFER,
  };
  Handle<JSFunction> CreateArrayBuffer(Handle<String> name,
                                       ArrayBufferKind array_buffer_kind);
  Handle<JSFunction> InstallInternalArray(Handle<JSObject> target,
                                          const char* name,
                                          ElementsKind elements_kind);
  bool InstallNatives(GlobalContextType context_type);

  Handle<JSFunction> InstallTypedArray(const char* name,
                                       ElementsKind elements_kind);
  bool InstallExtraNatives();
  bool InstallExperimentalExtraNatives();
  bool InstallDebuggerNatives();
  void InstallBuiltinFunctionIds();
  void InstallExperimentalBuiltinFunctionIds();
  void InitializeNormalizedMapCaches();

  enum ExtensionTraversalState {
    UNVISITED, VISITED, INSTALLED
  };

  class ExtensionStates {
   public:
    ExtensionStates();
    ExtensionTraversalState get_state(RegisteredExtension* extension);
    void set_state(RegisteredExtension* extension,
                   ExtensionTraversalState state);
   private:
    base::HashMap map_;
    DISALLOW_COPY_AND_ASSIGN(ExtensionStates);
  };

  // Used both for deserialized and from-scratch contexts to add the extensions
  // provided.
  static bool InstallExtensions(Handle<Context> native_context,
                                v8::ExtensionConfiguration* extensions);
  static bool InstallAutoExtensions(Isolate* isolate,
                                    ExtensionStates* extension_states);
  static bool InstallRequestedExtensions(Isolate* isolate,
                                         v8::ExtensionConfiguration* extensions,
                                         ExtensionStates* extension_states);
  static bool InstallExtension(Isolate* isolate,
                               const char* name,
                               ExtensionStates* extension_states);
  static bool InstallExtension(Isolate* isolate,
                               v8::RegisteredExtension* current,
                               ExtensionStates* extension_states);
  static bool InstallSpecialObjects(Handle<Context> native_context);
  bool ConfigureApiObject(Handle<JSObject> object,
                          Handle<ObjectTemplateInfo> object_template);
  bool ConfigureGlobalObjects(
      v8::Local<v8::ObjectTemplate> global_proxy_template);

  // Migrates all properties from the 'from' object to the 'to'
  // object and overrides the prototype in 'to' with the one from
  // 'from'.
  void TransferObject(Handle<JSObject> from, Handle<JSObject> to);
  void TransferNamedProperties(Handle<JSObject> from, Handle<JSObject> to);
  void TransferIndexedProperties(Handle<JSObject> from, Handle<JSObject> to);

  static bool CallUtilsFunction(Isolate* isolate, const char* name);

  static bool CompileExtension(Isolate* isolate, v8::Extension* extension);

  Isolate* isolate_;
  Handle<Context> result_;
  Handle<Context> native_context_;
  Handle<JSGlobalProxy> global_proxy_;

  // Temporary function maps needed only during bootstrapping.
  Handle<Map> strict_function_with_home_object_map_;
  Handle<Map> strict_function_with_name_and_home_object_map_;

  // %ThrowTypeError%. See ES#sec-%throwtypeerror% for details.
  Handle<JSFunction> restricted_properties_thrower_;

  BootstrapperActive active_;
  friend class Bootstrapper;
};

void Bootstrapper::Iterate(RootVisitor* v) {
  extensions_cache_.Iterate(v);
  v->Synchronize(VisitorSynchronization::kExtensions);
}

Handle<Context> Bootstrapper::CreateEnvironment(
    MaybeHandle<JSGlobalProxy> maybe_global_proxy,
    v8::Local<v8::ObjectTemplate> global_proxy_template,
    v8::ExtensionConfiguration* extensions, size_t context_snapshot_index,
    v8::DeserializeEmbedderFieldsCallback embedder_fields_deserializer,
    GlobalContextType context_type) {
  HandleScope scope(isolate_);
  Handle<Context> env;
  {
    Genesis genesis(isolate_, maybe_global_proxy, global_proxy_template,
                    context_snapshot_index, embedder_fields_deserializer,
                    context_type);
    env = genesis.result();
    if (env.is_null() || !InstallExtensions(env, extensions)) {
      return Handle<Context>();
    }
  }
  // Log all maps created during bootstrapping.
  if (FLAG_trace_maps) LOG(isolate_, LogMaps());
  return scope.CloseAndEscape(env);
}

Handle<JSGlobalProxy> Bootstrapper::NewRemoteContext(
    MaybeHandle<JSGlobalProxy> maybe_global_proxy,
    v8::Local<v8::ObjectTemplate> global_proxy_template) {
  HandleScope scope(isolate_);
  Handle<JSGlobalProxy> global_proxy;
  {
    Genesis genesis(isolate_, maybe_global_proxy, global_proxy_template);
    global_proxy = genesis.global_proxy();
    if (global_proxy.is_null()) return Handle<JSGlobalProxy>();
  }
  // Log all maps created during bootstrapping.
  if (FLAG_trace_maps) LOG(isolate_, LogMaps());
  return scope.CloseAndEscape(global_proxy);
}

void Bootstrapper::DetachGlobal(Handle<Context> env) {
  Isolate* isolate = env->GetIsolate();
  isolate->counters()->errors_thrown_per_context()->AddSample(
      env->GetErrorsThrown());

  Heap* heap = isolate->heap();
  Handle<JSGlobalProxy> global_proxy(JSGlobalProxy::cast(env->global_proxy()));
  global_proxy->set_native_context(heap->null_value());
  JSObject::ForceSetPrototype(global_proxy, isolate->factory()->null_value());
  global_proxy->map()->SetConstructor(heap->null_value());
  if (FLAG_track_detached_contexts) {
    env->GetIsolate()->AddDetachedContext(env);
  }
}

namespace {

// Non-construct case.
V8_NOINLINE Handle<SharedFunctionInfo> SimpleCreateSharedFunctionInfo(
    Isolate* isolate, Builtins::Name builtin_id, Handle<String> name, int len) {
  Handle<Code> code = isolate->builtins()->builtin_handle(builtin_id);
  const bool kNotConstructor = false;
  Handle<SharedFunctionInfo> shared = isolate->factory()->NewSharedFunctionInfo(
      name, code, kNotConstructor, kNormalFunction, builtin_id);
  shared->set_internal_formal_parameter_count(len);
  shared->set_length(len);
  return shared;
}

// Construct case.
V8_NOINLINE Handle<SharedFunctionInfo> SimpleCreateSharedFunctionInfo(
    Isolate* isolate, Builtins::Name builtin_id, Handle<String> name,
    Handle<String> instance_class_name, int len) {
  Handle<Code> code = isolate->builtins()->builtin_handle(builtin_id);
  const bool kIsConstructor = true;
  Handle<SharedFunctionInfo> shared = isolate->factory()->NewSharedFunctionInfo(
      name, code, kIsConstructor, kNormalFunction, builtin_id);
  shared->SetConstructStub(*BUILTIN_CODE(isolate, JSBuiltinsConstructStub));
  shared->set_instance_class_name(*instance_class_name);
  shared->set_internal_formal_parameter_count(len);
  shared->set_length(len);
  return shared;
}

V8_NOINLINE void InstallFunction(Handle<JSObject> target,
                                 Handle<Name> property_name,
                                 Handle<JSFunction> function,
                                 Handle<String> function_name,
                                 PropertyAttributes attributes = DONT_ENUM) {
  JSObject::AddProperty(target, property_name, function, attributes);
  if (target->IsJSGlobalObject()) {
    function->shared()->set_instance_class_name(*function_name);
  }
}

V8_NOINLINE void InstallFunction(Handle<JSObject> target,
                                 Handle<JSFunction> function, Handle<Name> name,
                                 PropertyAttributes attributes = DONT_ENUM) {
  Handle<String> name_string = Name::ToFunctionName(name).ToHandleChecked();
  InstallFunction(target, name, function, name_string, attributes);
}

V8_NOINLINE Handle<JSFunction> CreateFunction(
    Isolate* isolate, Handle<String> name, InstanceType type, int instance_size,
    int inobject_properties, MaybeHandle<Object> maybe_prototype,
    Builtins::Name builtin_id) {
  Handle<Code> code(isolate->builtins()->builtin(builtin_id));
  Handle<Object> prototype;
  Handle<JSFunction> result;

  if (maybe_prototype.ToHandle(&prototype)) {
    NewFunctionArgs args = NewFunctionArgs::ForBuiltinWithPrototype(
        name, code, prototype, type, instance_size, inobject_properties,
        builtin_id, IMMUTABLE);

    result = isolate->factory()->NewFunction(args);
    // Make the JSFunction's prototype object fast.
    JSObject::MakePrototypesFast(handle(result->prototype(), isolate),
                                 kStartAtReceiver, isolate);
  } else {
    NewFunctionArgs args = NewFunctionArgs::ForBuiltinWithoutPrototype(
        name, code, builtin_id, LanguageMode::kStrict);
    result = isolate->factory()->NewFunction(args);
  }

  // Make the resulting JSFunction object fast.
  JSObject::MakePrototypesFast(result, kStartAtReceiver, isolate);
  result->shared()->set_native(true);
  return result;
}

V8_NOINLINE Handle<JSFunction> InstallFunction(
    Handle<JSObject> target, Handle<Name> name, InstanceType type,
    int instance_size, int inobject_properties,
    MaybeHandle<Object> maybe_prototype, Builtins::Name call,
    PropertyAttributes attributes) {
  Handle<String> name_string = Name::ToFunctionName(name).ToHandleChecked();
  Handle<JSFunction> function =
      CreateFunction(target->GetIsolate(), name_string, type, instance_size,
                     inobject_properties, maybe_prototype, call);
  InstallFunction(target, name, function, name_string, attributes);
  return function;
}

V8_NOINLINE Handle<JSFunction> InstallFunction(
    Handle<JSObject> target, const char* name, InstanceType type,
    int instance_size, int inobject_properties,
    MaybeHandle<Object> maybe_prototype, Builtins::Name call) {
  Factory* const factory = target->GetIsolate()->factory();
  PropertyAttributes attributes = DONT_ENUM;
  return InstallFunction(target, factory->InternalizeUtf8String(name), type,
                         instance_size, inobject_properties, maybe_prototype,
                         call, attributes);
}

V8_NOINLINE Handle<JSFunction> SimpleCreateFunction(Isolate* isolate,
                                                    Handle<String> name,
                                                    Builtins::Name call,
                                                    int len, bool adapt) {
  Handle<JSFunction> fun =
      CreateFunction(isolate, name, JS_OBJECT_TYPE, JSObject::kHeaderSize, 0,
                     MaybeHandle<JSObject>(), call);
  if (adapt) {
    fun->shared()->set_internal_formal_parameter_count(len);
  } else {
    fun->shared()->DontAdaptArguments();
  }
  fun->shared()->set_length(len);
  return fun;
}

V8_NOINLINE Handle<JSFunction> SimpleInstallFunction(
    Handle<JSObject> base, Handle<Name> property_name,
    Handle<String> function_name, Builtins::Name call, int len, bool adapt,
    PropertyAttributes attrs = DONT_ENUM,
    BuiltinFunctionId id = kInvalidBuiltinFunctionId) {
  Handle<JSFunction> fun =
      SimpleCreateFunction(base->GetIsolate(), function_name, call, len, adapt);
  if (id != kInvalidBuiltinFunctionId) {
    fun->shared()->set_builtin_function_id(id);
  }
  InstallFunction(base, fun, property_name, attrs);
  return fun;
}

V8_NOINLINE Handle<JSFunction> SimpleInstallFunction(
    Handle<JSObject> base, Handle<String> name, Builtins::Name call, int len,
    bool adapt, PropertyAttributes attrs = DONT_ENUM,
    BuiltinFunctionId id = kInvalidBuiltinFunctionId) {
  return SimpleInstallFunction(base, name, name, call, len, adapt, attrs, id);
}

V8_NOINLINE Handle<JSFunction> SimpleInstallFunction(
    Handle<JSObject> base, Handle<Name> property_name,
    const char* function_name, Builtins::Name call, int len, bool adapt,
    PropertyAttributes attrs = DONT_ENUM,
    BuiltinFunctionId id = kInvalidBuiltinFunctionId) {
  Factory* const factory = base->GetIsolate()->factory();
  // Function name does not have to be internalized.
  return SimpleInstallFunction(
      base, property_name, factory->NewStringFromAsciiChecked(function_name),
      call, len, adapt, attrs, id);
}

V8_NOINLINE Handle<JSFunction> SimpleInstallFunction(
    Handle<JSObject> base, const char* name, Builtins::Name call, int len,
    bool adapt, PropertyAttributes attrs = DONT_ENUM,
    BuiltinFunctionId id = kInvalidBuiltinFunctionId) {
  Factory* const factory = base->GetIsolate()->factory();
  // Although function name does not have to be internalized the property name
  // will be internalized during property addition anyway, so do it here now.
  return SimpleInstallFunction(base, factory->InternalizeUtf8String(name), call,
                               len, adapt, attrs, id);
}

V8_NOINLINE Handle<JSFunction> SimpleInstallFunction(Handle<JSObject> base,
                                                     const char* name,
                                                     Builtins::Name call,
                                                     int len, bool adapt,
                                                     BuiltinFunctionId id) {
  return SimpleInstallFunction(base, name, call, len, adapt, DONT_ENUM, id);
}

V8_NOINLINE void SimpleInstallGetterSetter(Handle<JSObject> base,
                                           Handle<String> name,
                                           Builtins::Name call_getter,
                                           Builtins::Name call_setter,
                                           PropertyAttributes attribs) {
  Isolate* const isolate = base->GetIsolate();

  Handle<String> getter_name =
      Name::ToFunctionName(name, isolate->factory()->get_string())
          .ToHandleChecked();
  Handle<JSFunction> getter =
      SimpleCreateFunction(isolate, getter_name, call_getter, 0, true);

  Handle<String> setter_name =
      Name::ToFunctionName(name, isolate->factory()->set_string())
          .ToHandleChecked();
  Handle<JSFunction> setter =
      SimpleCreateFunction(isolate, setter_name, call_setter, 1, true);

  JSObject::DefineAccessor(base, name, getter, setter, attribs).Check();
}

V8_NOINLINE Handle<JSFunction> SimpleInstallGetter(Handle<JSObject> base,
                                                   Handle<Name> name,
                                                   Handle<Name> property_name,
                                                   Builtins::Name call,
                                                   bool adapt) {
  Isolate* const isolate = base->GetIsolate();

  Handle<String> getter_name =
      Name::ToFunctionName(name, isolate->factory()->get_string())
          .ToHandleChecked();
  Handle<JSFunction> getter =
      SimpleCreateFunction(isolate, getter_name, call, 0, adapt);

  Handle<Object> setter = isolate->factory()->undefined_value();

  JSObject::DefineAccessor(base, property_name, getter, setter, DONT_ENUM)
      .Check();

  return getter;
}

V8_NOINLINE Handle<JSFunction> SimpleInstallGetter(Handle<JSObject> base,
                                                   Handle<Name> name,
                                                   Builtins::Name call,
                                                   bool adapt) {
  return SimpleInstallGetter(base, name, name, call, adapt);
}

V8_NOINLINE Handle<JSFunction> SimpleInstallGetter(Handle<JSObject> base,
                                                   Handle<Name> name,
                                                   Builtins::Name call,
                                                   bool adapt,
                                                   BuiltinFunctionId id) {
  Handle<JSFunction> fun = SimpleInstallGetter(base, name, call, adapt);
  fun->shared()->set_builtin_function_id(id);
  return fun;
}

V8_NOINLINE void InstallConstant(Isolate* isolate, Handle<JSObject> holder,
                                 const char* name, Handle<Object> value) {
  JSObject::AddProperty(
      holder, isolate->factory()->NewStringFromAsciiChecked(name), value,
      static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
}

V8_NOINLINE void InstallSpeciesGetter(Handle<JSFunction> constructor) {
  Factory* factory = constructor->GetIsolate()->factory();
  // TODO(adamk): We should be able to share a SharedFunctionInfo
  // between all these JSFunctins.
  SimpleInstallGetter(constructor, factory->symbol_species_string(),
                      factory->species_symbol(), Builtins::kReturnReceiver,
                      true);
}

}  // namespace

Handle<JSFunction> Genesis::CreateEmptyFunction(Isolate* isolate) {
  Factory* factory = isolate->factory();

  // Allocate the function map first and then patch the prototype later.
  Handle<Map> empty_function_map = factory->CreateSloppyFunctionMap(
      FUNCTION_WITHOUT_PROTOTYPE, MaybeHandle<JSFunction>());
  empty_function_map->set_is_prototype_map(true);
  DCHECK(!empty_function_map->is_dictionary_map());

  // Allocate the empty function as the prototype for function according to
  // ES#sec-properties-of-the-function-prototype-object
  Handle<Code> code(BUILTIN_CODE(isolate, EmptyFunction));
  NewFunctionArgs args =
      NewFunctionArgs::ForBuiltin(factory->empty_string(), code,
                                  empty_function_map, Builtins::kEmptyFunction);
  Handle<JSFunction> empty_function = factory->NewFunction(args);

  // --- E m p t y ---
  Handle<String> source = factory->NewStringFromStaticChars("() {}");
  Handle<Script> script = factory->NewScript(source);
  script->set_type(Script::TYPE_NATIVE);
  Handle<FixedArray> infos = factory->NewFixedArray(2);
  script->set_shared_function_infos(*infos);
  empty_function->shared()->set_start_position(0);
  empty_function->shared()->set_end_position(source->length());
  empty_function->shared()->set_function_literal_id(1);
  empty_function->shared()->DontAdaptArguments();
  SharedFunctionInfo::SetScript(handle(empty_function->shared()), script);

  return empty_function;
}

void Genesis::CreateSloppyModeFunctionMaps(Handle<JSFunction> empty) {
  Factory* factory = isolate_->factory();
  Handle<Map> map;

  //
  // Allocate maps for sloppy functions without prototype.
  //
  map = factory->CreateSloppyFunctionMap(FUNCTION_WITHOUT_PROTOTYPE, empty);
  native_context()->set_sloppy_function_without_prototype_map(*map);

  //
  // Allocate maps for sloppy functions with readonly prototype.
  //
  map =
      factory->CreateSloppyFunctionMap(FUNCTION_WITH_READONLY_PROTOTYPE, empty);
  native_context()->set_sloppy_function_with_readonly_prototype_map(*map);

  //
  // Allocate maps for sloppy functions with writable prototype.
  //
  map = factory->CreateSloppyFunctionMap(FUNCTION_WITH_WRITEABLE_PROTOTYPE,
                                         empty);
  native_context()->set_sloppy_function_map(*map);

  map = factory->CreateSloppyFunctionMap(
      FUNCTION_WITH_NAME_AND_WRITEABLE_PROTOTYPE, empty);
  native_context()->set_sloppy_function_with_name_map(*map);
}

Handle<JSFunction> Genesis::GetThrowTypeErrorIntrinsic() {
  if (!restricted_properties_thrower_.is_null()) {
    return restricted_properties_thrower_;
  }
  Handle<String> name(factory()->empty_string());
  Handle<Code> code = BUILTIN_CODE(isolate(), StrictPoisonPillThrower);
  NewFunctionArgs args = NewFunctionArgs::ForBuiltinWithoutPrototype(
      name, code, Builtins::kStrictPoisonPillThrower, i::LanguageMode::kStrict);
  Handle<JSFunction> function = factory()->NewFunction(args);
  function->shared()->DontAdaptArguments();

  // %ThrowTypeError% must not have a name property.
  if (JSReceiver::DeleteProperty(function, factory()->name_string())
          .IsNothing()) {
    DCHECK(false);
  }

  // length needs to be non configurable.
  Handle<Object> value(Smi::FromInt(function->shared()->GetLength()),
                       isolate());
  JSObject::SetOwnPropertyIgnoreAttributes(
      function, factory()->length_string(), value,
      static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY))
      .Assert();

  if (JSObject::PreventExtensions(function, kThrowOnError).IsNothing()) {
    DCHECK(false);
  }

  JSObject::MigrateSlowToFast(function, 0, "Bootstrapping");

  restricted_properties_thrower_ = function;
  return function;
}

void Genesis::CreateStrictModeFunctionMaps(Handle<JSFunction> empty) {
  Factory* factory = isolate_->factory();
  Handle<Map> map;

  //
  // Allocate maps for strict functions without prototype.
  //
  map = factory->CreateStrictFunctionMap(FUNCTION_WITHOUT_PROTOTYPE, empty);
  native_context()->set_strict_function_without_prototype_map(*map);

  map = factory->CreateStrictFunctionMap(METHOD_WITH_NAME, empty);
  native_context()->set_method_with_name_map(*map);

  map = factory->CreateStrictFunctionMap(METHOD_WITH_HOME_OBJECT, empty);
  native_context()->set_method_with_home_object_map(*map);

  map =
      factory->CreateStrictFunctionMap(METHOD_WITH_NAME_AND_HOME_OBJECT, empty);
  native_context()->set_method_with_name_and_home_object_map(*map);

  //
  // Allocate maps for strict functions with writable prototype.
  //
  map = factory->CreateStrictFunctionMap(FUNCTION_WITH_WRITEABLE_PROTOTYPE,
                                         empty);
  native_context()->set_strict_function_map(*map);

  map = factory->CreateStrictFunctionMap(
      FUNCTION_WITH_NAME_AND_WRITEABLE_PROTOTYPE, empty);
  native_context()->set_strict_function_with_name_map(*map);

  strict_function_with_home_object_map_ = factory->CreateStrictFunctionMap(
      FUNCTION_WITH_HOME_OBJECT_AND_WRITEABLE_PROTOTYPE, empty);
  strict_function_with_name_and_home_object_map_ =
      factory->CreateStrictFunctionMap(
          FUNCTION_WITH_NAME_AND_HOME_OBJECT_AND_WRITEABLE_PROTOTYPE, empty);

  //
  // Allocate maps for strict functions with readonly prototype.
  //
  map =
      factory->CreateStrictFunctionMap(FUNCTION_WITH_READONLY_PROTOTYPE, empty);
  native_context()->set_strict_function_with_readonly_prototype_map(*map);

  //
  // Allocate map for class functions.
  //
  map = factory->CreateClassFunctionMap(empty);
  native_context()->set_class_function_map(*map);

  // Now that the strict mode function map is available, set up the
  // restricted "arguments" and "caller" getters.
  AddRestrictedFunctionProperties(empty);
}

void Genesis::CreateObjectFunction(Handle<JSFunction> empty_function) {
  Factory* factory = isolate_->factory();

  // --- O b j e c t ---
  int inobject_properties = JSObject::kInitialGlobalObjectUnusedPropertiesCount;
  int instance_size =
      JSObject::kHeaderSize + kPointerSize * inobject_properties;

  Handle<JSFunction> object_fun = CreateFunction(
      isolate_, factory->Object_string(), JS_OBJECT_TYPE, instance_size,
      inobject_properties, factory->null_value(), Builtins::kObjectConstructor);
  object_fun->shared()->set_length(1);
  object_fun->shared()->DontAdaptArguments();
  object_fun->shared()->SetConstructStub(
      *BUILTIN_CODE(isolate_, ObjectConstructor_ConstructStub));
  native_context()->set_object_function(*object_fun);

  {
    // Finish setting up Object function's initial map.
    Map* initial_map = object_fun->initial_map();
    initial_map->set_elements_kind(HOLEY_ELEMENTS);
  }

  // Allocate a new prototype for the object function.
  Handle<JSObject> object_function_prototype =
      factory->NewFunctionPrototype(object_fun);

  Handle<Map> map = Map::Copy(handle(object_function_prototype->map()),
                              "EmptyObjectPrototype");
  map->set_is_prototype_map(true);
  // Ban re-setting Object.prototype.__proto__ to prevent Proxy security bug
  map->set_is_immutable_proto(true);
  object_function_prototype->set_map(*map);

  // Complete setting up empty function.
  {
    Handle<Map> empty_function_map(empty_function->map(), isolate_);
    Map::SetPrototype(empty_function_map, object_function_prototype);
  }

  native_context()->set_initial_object_prototype(*object_function_prototype);
  JSFunction::SetPrototype(object_fun, object_function_prototype);

  {
    // Set up slow map for Object.create(null) instances without in-object
    // properties.
    Handle<Map> map(object_fun->initial_map(), isolate_);
    map = Map::CopyInitialMapNormalized(map);
    Map::SetPrototype(map, factory->null_value());
    native_context()->set_slow_object_with_null_prototype_map(*map);

    // Set up slow map for literals with too many properties.
    map = Map::Copy(map, "slow_object_with_object_prototype_map");
    Map::SetPrototype(map, object_function_prototype);
    native_context()->set_slow_object_with_object_prototype_map(*map);
  }
}

namespace {

Handle<Map> CreateNonConstructorMap(Handle<Map> source_map,
                                    Handle<JSObject> prototype,
                                    const char* reason) {
  Handle<Map> map = Map::Copy(source_map, reason);
  // Ensure the resulting map has prototype slot (it is necessary for storing
  // inital map even when the prototype property is not required).
  if (!map->has_prototype_slot()) {
    // Re-set the unused property fields after changing the instance size.
    // TODO(ulan): Do not change instance size after map creation.
    int unused_property_fields = map->UnusedPropertyFields();
    map->set_instance_size(map->instance_size() + kPointerSize);
    // The prototype slot shifts the in-object properties area by one slot.
    map->SetInObjectPropertiesStartInWords(
        map->GetInObjectPropertiesStartInWords() + 1);
    map->set_has_prototype_slot(true);
    map->SetInObjectUnusedPropertyFields(unused_property_fields);
  }
  map->set_is_constructor(false);
  Map::SetPrototype(map, prototype);
  return map;
}

}  // namespace

void Genesis::CreateIteratorMaps(Handle<JSFunction> empty) {
  // Create iterator-related meta-objects.
  Handle<JSObject> iterator_prototype =
      factory()->NewJSObject(isolate()->object_function(), TENURED);

  SimpleInstallFunction(iterator_prototype, factory()->iterator_symbol(),
                        "[Symbol.iterator]", Builtins::kReturnReceiver, 0,
                        true);
  native_context()->set_initial_iterator_prototype(*iterator_prototype);

  Handle<JSObject> generator_object_prototype =
      factory()->NewJSObject(isolate()->object_function(), TENURED);
  native_context()->set_initial_generator_prototype(
      *generator_object_prototype);
  JSObject::ForceSetPrototype(generator_object_prototype, iterator_prototype);
  Handle<JSObject> generator_function_prototype =
      factory()->NewJSObject(isolate()->object_function(), TENURED);
  JSObject::ForceSetPrototype(generator_function_prototype, empty);

  JSObject::AddProperty(
      generator_function_prototype, factory()->to_string_tag_symbol(),
      factory()->NewStringFromAsciiChecked("GeneratorFunction"),
      static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
  JSObject::AddProperty(generator_function_prototype,
                        factory()->prototype_string(),
                        generator_object_prototype,
                        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

  JSObject::AddProperty(generator_object_prototype,
                        factory()->constructor_string(),
                        generator_function_prototype,
                        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
  JSObject::AddProperty(generator_object_prototype,
                        factory()->to_string_tag_symbol(),
                        factory()->NewStringFromAsciiChecked("Generator"),
                        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
  SimpleInstallFunction(generator_object_prototype, "next",
                        Builtins::kGeneratorPrototypeNext, 1, false);
  SimpleInstallFunction(generator_object_prototype, "return",
                        Builtins::kGeneratorPrototypeReturn, 1, false);
  SimpleInstallFunction(generator_object_prototype, "throw",
                        Builtins::kGeneratorPrototypeThrow, 1, false);

  // Internal version of generator_prototype_next, flagged as non-native such
  // that it doesn't show up in Error traces.
  Handle<JSFunction> generator_next_internal =
      SimpleCreateFunction(isolate(), factory()->next_string(),
                           Builtins::kGeneratorPrototypeNext, 1, false);
  generator_next_internal->shared()->set_native(false);
  native_context()->set_generator_next_internal(*generator_next_internal);

  // Create maps for generator functions and their prototypes.  Store those
  // maps in the native context. The "prototype" property descriptor is
  // writable, non-enumerable, and non-configurable (as per ES6 draft
  // 04-14-15, section 25.2.4.3).
  // Generator functions do not have "caller" or "arguments" accessors.
  Handle<Map> map;
  map = CreateNonConstructorMap(isolate()->strict_function_map(),
                                generator_function_prototype,
                                "GeneratorFunction");
  native_context()->set_generator_function_map(*map);

  map = CreateNonConstructorMap(isolate()->strict_function_with_name_map(),
                                generator_function_prototype,
                                "GeneratorFunction with name");
  native_context()->set_generator_function_with_name_map(*map);

  map = CreateNonConstructorMap(strict_function_with_home_object_map_,
                                generator_function_prototype,
                                "GeneratorFunction with home object");
  native_context()->set_generator_function_with_home_object_map(*map);

  map = CreateNonConstructorMap(strict_function_with_name_and_home_object_map_,
                                generator_function_prototype,
                                "GeneratorFunction with name and home object");
  native_context()->set_generator_function_with_name_and_home_object_map(*map);

  Handle<JSFunction> object_function(native_context()->object_function());
  Handle<Map> generator_object_prototype_map = Map::Create(isolate(), 0);
  Map::SetPrototype(generator_object_prototype_map, generator_object_prototype);
  native_context()->set_generator_object_prototype_map(
      *generator_object_prototype_map);
}

void Genesis::CreateAsyncIteratorMaps(Handle<JSFunction> empty) {
  // %AsyncIteratorPrototype%
  // proposal-async-iteration/#sec-asynciteratorprototype
  Handle<JSObject> async_iterator_prototype =
      factory()->NewJSObject(isolate()->object_function(), TENURED);

  SimpleInstallFunction(
      async_iterator_prototype, factory()->async_iterator_symbol(),
      "[Symbol.asyncIterator]", Builtins::kReturnReceiver, 0, true);

  // %AsyncFromSyncIteratorPrototype%
  // proposal-async-iteration/#sec-%asyncfromsynciteratorprototype%-object
  Handle<JSObject> async_from_sync_iterator_prototype =
      factory()->NewJSObject(isolate()->object_function(), TENURED);
  SimpleInstallFunction(async_from_sync_iterator_prototype,
                        factory()->next_string(),
                        Builtins::kAsyncFromSyncIteratorPrototypeNext, 1, true);
  SimpleInstallFunction(
      async_from_sync_iterator_prototype, factory()->return_string(),
      Builtins::kAsyncFromSyncIteratorPrototypeReturn, 1, true);
  SimpleInstallFunction(
      async_from_sync_iterator_prototype, factory()->throw_string(),
      Builtins::kAsyncFromSyncIteratorPrototypeThrow, 1, true);

  JSObject::AddProperty(
      async_from_sync_iterator_prototype, factory()->to_string_tag_symbol(),
      factory()->NewStringFromAsciiChecked("Async-from-Sync Iterator"),
      static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

  JSObject::ForceSetPrototype(async_from_sync_iterator_prototype,
                              async_iterator_prototype);

  Handle<Map> async_from_sync_iterator_map = factory()->NewMap(
      JS_ASYNC_FROM_SYNC_ITERATOR_TYPE, JSAsyncFromSyncIterator::kSize);
  Map::SetPrototype(async_from_sync_iterator_map,
                    async_from_sync_iterator_prototype);
  native_context()->set_async_from_sync_iterator_map(
      *async_from_sync_iterator_map);

  // Async Generators
  Handle<String> AsyncGeneratorFunction_string =
      factory()->NewStringFromAsciiChecked("AsyncGeneratorFunction", TENURED);

  Handle<JSObject> async_generator_object_prototype =
      factory()->NewJSObject(isolate()->object_function(), TENURED);
  Handle<JSObject> async_generator_function_prototype =
      factory()->NewJSObject(isolate()->object_function(), TENURED);

  // %AsyncGenerator% / %AsyncGeneratorFunction%.prototype
  JSObject::ForceSetPrototype(async_generator_function_prototype, empty);

  // The value of AsyncGeneratorFunction.prototype.prototype is the
  //     %AsyncGeneratorPrototype% intrinsic object.
  // This property has the attributes
  //     { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }.
  JSObject::AddProperty(async_generator_function_prototype,
                        factory()->prototype_string(),
                        async_generator_object_prototype,
                        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
  JSObject::AddProperty(async_generator_function_prototype,
                        factory()->to_string_tag_symbol(),
                        AsyncGeneratorFunction_string,
                        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

  // %AsyncGeneratorPrototype%
  JSObject::ForceSetPrototype(async_generator_object_prototype,
                              async_iterator_prototype);
  native_context()->set_initial_async_generator_prototype(
      *async_generator_object_prototype);

  JSObject::AddProperty(async_generator_object_prototype,
                        factory()->to_string_tag_symbol(),
                        factory()->NewStringFromAsciiChecked("AsyncGenerator"),
                        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));
  SimpleInstallFunction(async_generator_object_prototype, "next",
                        Builtins::kAsyncGeneratorPrototypeNext, 1, false);
  SimpleInstallFunction(async_generator_object_prototype, "return",
                        Builtins::kAsyncGeneratorPrototypeReturn, 1, false);
  SimpleInstallFunction(async_generator_object_prototype, "throw",
                        Builtins::kAsyncGeneratorPrototypeThrow, 1, false);

  // Create maps for generator functions and their prototypes.  Store those
  // maps in the native context. The "prototype" property descriptor is
  // writable, non-enumerable, and non-configurable (as per ES6 draft
  // 04-14-15, section 25.2.4.3).
  // Async Generator functions do not have "caller" or "arguments" accessors.
  Handle<Map> map;
  map = CreateNonConstructorMap(isolate()->strict_function_map(),
                                async_generator_function_prototype,
                                "AsyncGeneratorFunction");
  native_context()->set_async_generator_function_map(*map);

  map = CreateNonConstructorMap(isolate()->strict_function_with_name_map(),
                                async_generator_function_prototype,
                                "AsyncGeneratorFunction with name");
  native_context()->set_async_generator_function_with_name_map(*map);

  map = CreateNonConstructorMap(strict_function_with_home_object_map_,
                                async_generator_function_prototype,
                                "AsyncGeneratorFunction with home object");
  native_context()->set_async_generator_function_with_home_object_map(*map);

  map = CreateNonConstructorMap(
      strict_function_with_name_and_home_object_map_,
      async_generator_function_prototype,
      "AsyncGeneratorFunction with name and home object");
  native_context()->set_async_generator_function_with_name_and_home_object_map(
      *map);

  Handle<JSFunction> object_function(native_context()->object_function());
  Handle<Map> async_generator_object_prototype_map = Map::Create(isolate(), 0);
  Map::SetPrototype(async_generator_object_prototype_map,
                    async_generator_object_prototype);
  native_context()->set_async_generator_object_prototype_map(
      *async_generator_object_prototype_map);
}

void Genesis::CreateAsyncFunctionMaps(Handle<JSFunction> empty) {
  // %AsyncFunctionPrototype% intrinsic
  Handle<JSObject> async_function_prototype =
      factory()->NewJSObject(isolate()->object_function(), TENURED);
  JSObject::ForceSetPrototype(async_function_prototype, empty);

  JSObject::AddProperty(async_function_prototype,
                        factory()->to_string_tag_symbol(),
                        factory()->NewStringFromAsciiChecked("AsyncFunction"),
                        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

  Handle<Map> map;
  map = CreateNonConstructorMap(
      isolate()->strict_function_without_prototype_map(),
      async_function_prototype, "AsyncFunction");
  native_context()->set_async_function_map(*map);

  map = CreateNonConstructorMap(isolate()->method_with_name_map(),
                                async_function_prototype,
                                "AsyncFunction with name");
  native_context()->set_async_function_with_name_map(*map);

  map = CreateNonConstructorMap(isolate()->method_with_home_object_map(),
                                async_function_prototype,
                                "AsyncFunction with home object");
  native_context()->set_async_function_with_home_object_map(*map);

  map = CreateNonConstructorMap(
      isolate()->method_with_name_and_home_object_map(),
      async_function_prototype, "AsyncFunction with name and home object");
  native_context()->set_async_function_with_name_and_home_object_map(*map);
}

void Genesis::CreateJSProxyMaps() {
  // Allocate maps for all Proxy types.
  // Next to the default proxy, we need maps indicating callable and
  // constructable proxies.
  Handle<Map> proxy_map = factory()->NewMap(JS_PROXY_TYPE, JSProxy::kSize,
                                            TERMINAL_FAST_ELEMENTS_KIND);
  proxy_map->set_is_dictionary_map(true);
  proxy_map->set_may_have_interesting_symbols(true);
  native_context()->set_proxy_map(*proxy_map);

  Handle<Map> proxy_callable_map = Map::Copy(proxy_map, "callable Proxy");
  proxy_callable_map->set_is_callable(true);
  native_context()->set_proxy_callable_map(*proxy_callable_map);
  proxy_callable_map->SetConstructor(native_context()->function_function());

  Handle<Map> proxy_constructor_map =
      Map::Copy(proxy_callable_map, "constructor Proxy");
  proxy_constructor_map->set_is_constructor(true);
  native_context()->set_proxy_constructor_map(*proxy_constructor_map);

  {
    Handle<Map> map =
        factory()->NewMap(JS_OBJECT_TYPE, JSProxyRevocableResult::kSize,
                          TERMINAL_FAST_ELEMENTS_KIND, 2);
    Map::EnsureDescriptorSlack(map, 2);

    {  // proxy
      Descriptor d = Descriptor::DataField(factory()->proxy_string(),
                                           JSProxyRevocableResult::kProxyIndex,
                                           NONE, Representation::Tagged());
      map->AppendDescriptor(&d);
    }
    {  // revoke
      Descriptor d = Descriptor::DataField(factory()->revoke_string(),
                                           JSProxyRevocableResult::kRevokeIndex,
                                           NONE, Representation::Tagged());
      map->AppendDescriptor(&d);
    }

    Map::SetPrototype(map, isolate()->initial_object_prototype());
    map->SetConstructor(native_context()->object_function());

    native_context()->set_proxy_revocable_result_map(*map);
  }
}

namespace {
void ReplaceAccessors(Handle<Map> map, Handle<String> name,
                      PropertyAttributes attributes,
                      Handle<AccessorPair> accessor_pair) {
  DescriptorArray* descriptors = map->instance_descriptors();
  int idx = descriptors->SearchWithCache(map->GetIsolate(), *name, *map);
  Descriptor d = Descriptor::AccessorConstant(name, accessor_pair, attributes);
  descriptors->Replace(idx, &d);
}
}  // namespace

void Genesis::AddRestrictedFunctionProperties(Handle<JSFunction> empty) {
  PropertyAttributes rw_attribs = static_cast<PropertyAttributes>(DONT_ENUM);
  Handle<JSFunction> thrower = GetThrowTypeErrorIntrinsic();
  Handle<AccessorPair> accessors = factory()->NewAccessorPair();
  accessors->set_getter(*thrower);
  accessors->set_setter(*thrower);

  Handle<Map> map(empty->map());
  ReplaceAccessors(map, factory()->arguments_string(), rw_attribs, accessors);
  ReplaceAccessors(map, factory()->caller_string(), rw_attribs, accessors);
}


static void AddToWeakNativeContextList(Context* context) {
  DCHECK(context->IsNativeContext());
  Isolate* isolate = context->GetIsolate();
  Heap* heap = isolate->heap();
#ifdef DEBUG
  { // NOLINT
    DCHECK(context->next_context_link()->IsUndefined(isolate));
    // Check that context is not in the list yet.
    for (Object* current = heap->native_contexts_list();
         !current->IsUndefined(isolate);
         current = Context::cast(current)->next_context_link()) {
      DCHECK(current != context);
    }
  }
#endif
  context->set(Context::NEXT_CONTEXT_LINK, heap->native_contexts_list(),
               UPDATE_WEAK_WRITE_BARRIER);
  heap->set_native_contexts_list(context);
}


void Genesis::CreateRoots() {
  // Allocate the native context FixedArray first and then patch the
  // closure and extension object later (we need the empty function
  // and the global object, but in order to create those, we need the
  // native context).
  native_context_ = factory()->NewNativeContext();
  AddToWeakNativeContextList(*native_context());
  isolate()->set_context(*native_context());

  // Allocate the message listeners object.
  {
    Handle<TemplateList> list = TemplateList::New(isolate(), 1);
    native_context()->set_message_listeners(*list);
  }
}


void Genesis::InstallGlobalThisBinding() {
  Handle<ScriptContextTable> script_contexts(
      native_context()->script_context_table());
  Handle<ScopeInfo> scope_info = ScopeInfo::CreateGlobalThisBinding(isolate());
  Handle<JSFunction> closure(native_context()->closure());
  Handle<Context> context = factory()->NewScriptContext(closure, scope_info);

  // Go ahead and hook it up while we're at it.
  int slot = scope_info->ReceiverContextSlotIndex();
  DCHECK_EQ(slot, Context::MIN_CONTEXT_SLOTS);
  context->set(slot, native_context()->global_proxy());

  Handle<ScriptContextTable> new_script_contexts =
      ScriptContextTable::Extend(script_contexts, context);
  native_context()->set_script_context_table(*new_script_contexts);
}


Handle<JSGlobalObject> Genesis::CreateNewGlobals(
    v8::Local<v8::ObjectTemplate> global_proxy_template,
    Handle<JSGlobalProxy> global_proxy) {
  // The argument global_proxy_template aka data is an ObjectTemplateInfo.
  // It has a constructor pointer that points at global_constructor which is a
  // FunctionTemplateInfo.
  // The global_proxy_constructor is used to (re)initialize the
  // global_proxy. The global_proxy_constructor also has a prototype_template
  // pointer that points at js_global_object_template which is an
  // ObjectTemplateInfo.
  // That in turn has a constructor pointer that points at
  // js_global_object_constructor which is a FunctionTemplateInfo.
  // js_global_object_constructor is used to make js_global_object_function
  // js_global_object_function is used to make the new global_object.
  //
  // --- G l o b a l ---
  // Step 1: Create a fresh JSGlobalObject.
  Handle<JSFunction> js_global_object_function;
  Handle<ObjectTemplateInfo> js_global_object_template;
  if (!global_proxy_template.IsEmpty()) {
    // Get prototype template of the global_proxy_template.
    Handle<ObjectTemplateInfo> data =
        v8::Utils::OpenHandle(*global_proxy_template);
    Handle<FunctionTemplateInfo> global_constructor =
        Handle<FunctionTemplateInfo>(
            FunctionTemplateInfo::cast(data->constructor()));
    Handle<Object> proto_template(global_constructor->prototype_template(),
                                  isolate());
    if (!proto_template->IsUndefined(isolate())) {
      js_global_object_template =
          Handle<ObjectTemplateInfo>::cast(proto_template);
    }
  }

  if (js_global_object_template.is_null()) {
    Handle<String> name(factory()->empty_string());
    Handle<Code> code = BUILTIN_CODE(isolate(), Illegal);
    Handle<JSObject> prototype =
        factory()->NewFunctionPrototype(isolate()->object_function());
    NewFunctionArgs args = NewFunctionArgs::ForBuiltinWithPrototype(
        name, code, prototype, JS_GLOBAL_OBJECT_TYPE, JSGlobalObject::kSize, 0,
        Builtins::kIllegal, MUTABLE);
    js_global_object_function = factory()->NewFunction(args);
#ifdef DEBUG
    LookupIterator it(prototype, factory()->constructor_string(),
                      LookupIterator::OWN_SKIP_INTERCEPTOR);
    Handle<Object> value = Object::GetProperty(&it).ToHandleChecked();
    DCHECK(it.IsFound());
    DCHECK_EQ(*isolate()->object_function(), *value);
#endif
  } else {
    Handle<FunctionTemplateInfo> js_global_object_constructor(
        FunctionTemplateInfo::cast(js_global_object_template->constructor()));
    js_global_object_function = ApiNatives::CreateApiFunction(
        isolate(), js_global_object_constructor, factory()->the_hole_value(),
        ApiNatives::GlobalObjectType);
  }

  js_global_object_function->initial_map()->set_is_prototype_map(true);
  js_global_object_function->initial_map()->set_is_dictionary_map(true);
  js_global_object_function->initial_map()->set_may_have_interesting_symbols(
      true);
  Handle<JSGlobalObject> global_object =
      factory()->NewJSGlobalObject(js_global_object_function);

  // Step 2: (re)initialize the global proxy object.
  Handle<JSFunction> global_proxy_function;
  if (global_proxy_template.IsEmpty()) {
    Handle<String> name(factory()->empty_string());
    Handle<Code> code = BUILTIN_CODE(isolate(), Illegal);
    NewFunctionArgs args = NewFunctionArgs::ForBuiltinWithPrototype(
        name, code, factory()->the_hole_value(), JS_GLOBAL_PROXY_TYPE,
        JSGlobalProxy::SizeWithEmbedderFields(0), 0, Builtins::kIllegal,
        MUTABLE);
    global_proxy_function = factory()->NewFunction(args);
  } else {
    Handle<ObjectTemplateInfo> data =
        v8::Utils::OpenHandle(*global_proxy_template);
    Handle<FunctionTemplateInfo> global_constructor(
            FunctionTemplateInfo::cast(data->constructor()));
    global_proxy_function = ApiNatives::CreateApiFunction(
        isolate(), global_constructor, factory()->the_hole_value(),
        ApiNatives::GlobalProxyType);
  }
  Handle<String> global_name = factory()->global_string();
  global_proxy_function->shared()->set_instance_class_name(*global_name);
  global_proxy_function->initial_map()->set_is_access_check_needed(true);
  global_proxy_function->initial_map()->set_has_hidden_prototype(true);
  global_proxy_function->initial_map()->set_may_have_interesting_symbols(true);
  native_context()->set_global_proxy_function(*global_proxy_function);

  // Set global_proxy.__proto__ to js_global after ConfigureGlobalObjects
  // Return the global proxy.

  factory()->ReinitializeJSGlobalProxy(global_proxy, global_proxy_function);

  // Set the native context for the global object.
  global_object->set_native_context(*native_context());
  global_object->set_global_proxy(*global_proxy);
  // Set the native context of the global proxy.
  global_proxy->set_native_context(*native_context());
  // Set the global proxy of the native context. If the native context has been
  // deserialized, the global proxy is already correctly set up by the
  // deserializer. Otherwise it's undefined.
  DCHECK(native_context()
             ->get(Context::GLOBAL_PROXY_INDEX)
             ->IsUndefined(isolate()) ||
         native_context()->global_proxy() == *global_proxy);
  native_context()->set_global_proxy(*global_proxy);

  return global_object;
}

void Genesis::HookUpGlobalProxy(Handle<JSGlobalProxy> global_proxy) {
  // Re-initialize the global proxy with the global proxy function from the
  // snapshot, and then set up the link to the native context.
  Handle<JSFunction> global_proxy_function(
      native_context()->global_proxy_function());
  factory()->ReinitializeJSGlobalProxy(global_proxy, global_proxy_function);
  Handle<JSObject> global_object(
      JSObject::cast(native_context()->global_object()));
  JSObject::ForceSetPrototype(global_proxy, global_object);
  global_proxy->set_native_context(*native_context());
  DCHECK(native_context()->global_proxy() == *global_proxy);
}

void Genesis::HookUpGlobalObject(Handle<JSGlobalObject> global_object) {
  Handle<JSGlobalObject> global_object_from_snapshot(
      JSGlobalObject::cast(native_context()->extension()));
  native_context()->set_extension(*global_object);
  native_context()->set_security_token(*global_object);

  TransferNamedProperties(global_object_from_snapshot, global_object);
  TransferIndexedProperties(global_object_from_snapshot, global_object);
}

static void InstallWithIntrinsicDefaultProto(Isolate* isolate,
                                             Handle<JSFunction> function,
                                             int context_index) {
  Handle<Smi> index(Smi::FromInt(context_index), isolate);
  JSObject::AddProperty(
      function, isolate->factory()->native_context_index_symbol(), index, NONE);
  isolate->native_context()->set(context_index, *function);
}

static void InstallError(Isolate* isolate, Handle<JSObject> global,
                         Handle<String> name, int context_index) {
  Factory* factory = isolate->factory();

  Handle<JSFunction> error_fun = InstallFunction(
      global, name, JS_ERROR_TYPE, JSObject::kHeaderSize, 0,
      factory->the_hole_value(), Builtins::kErrorConstructor, DONT_ENUM);
  error_fun->shared()->set_instance_class_name(*factory->Error_string());
  error_fun->shared()->DontAdaptArguments();
  error_fun->shared()->SetConstructStub(
      *BUILTIN_CODE(isolate, ErrorConstructor));
  error_fun->shared()->set_length(1);

  if (context_index == Context::ERROR_FUNCTION_INDEX) {
    SimpleInstallFunction(error_fun, "captureStackTrace",
                          Builtins::kErrorCaptureStackTrace, 2, false);
  }

  InstallWithIntrinsicDefaultProto(isolate, error_fun, context_index);

  {
    // Setup %XXXErrorPrototype%.
    Handle<JSObject> prototype(JSObject::cast(error_fun->instance_prototype()));

    JSObject::AddProperty(prototype, factory->name_string(), name, DONT_ENUM);
    JSObject::AddProperty(prototype, factory->message_string(),
                          factory->empty_string(), DONT_ENUM);

    if (context_index == Context::ERROR_FUNCTION_INDEX) {
      Handle<JSFunction> to_string_fun =
          SimpleInstallFunction(prototype, factory->toString_string(),
                                Builtins::kErrorPrototypeToString, 0, true);
      isolate->native_context()->set_error_to_string(*to_string_fun);
      isolate->native_context()->set_initial_error_prototype(*prototype);
    } else {
      DCHECK(isolate->native_context()->error_to_string()->IsJSFunction());

      InstallFunction(prototype, isolate->error_to_string(),
                      factory->toString_string(), DONT_ENUM);

      Handle<JSFunction> global_error = isolate->error_function();
      CHECK(JSReceiver::SetPrototype(error_fun, global_error, false,
                                     kThrowOnError)
                .FromMaybe(false));
      CHECK(JSReceiver::SetPrototype(prototype,
                                     handle(global_error->prototype(), isolate),
                                     false, kThrowOnError)
                .FromMaybe(false));
    }
  }

  Handle<Map> initial_map(error_fun->initial_map());
  Map::EnsureDescriptorSlack(initial_map, 1);

  {
    Handle<AccessorInfo> info = factory->error_stack_accessor();
    Descriptor d = Descriptor::AccessorConstant(handle(info->name(), isolate),
                                                info, DONT_ENUM);
    initial_map->AppendDescriptor(&d);
  }
}

namespace {

void InstallMakeError(Isolate* isolate, int builtin_id, int context_index) {
  Handle<Code> code(isolate->builtins()->builtin(builtin_id));
  NewFunctionArgs args = NewFunctionArgs::ForBuiltinWithPrototype(
      isolate->factory()->empty_string(), code,
      isolate->factory()->the_hole_value(), JS_OBJECT_TYPE,
      JSObject::kHeaderSize, 0, builtin_id, MUTABLE);

  Handle<JSFunction> function = isolate->factory()->NewFunction(args);
  function->shared()->DontAdaptArguments();
  isolate->native_context()->set(context_index, *function);
}

}  // namespace

// This is only called if we are not using snapshots.  The equivalent
// work in the snapshot case is done in HookUpGlobalObject.
void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
                               Handle<JSFunction> empty_function,
                               GlobalContextType context_type) {
  // --- N a t i v e   C o n t e x t ---
  // Use the empty function as closure (no scope info).
  native_context()->set_closure(*empty_function);
  native_context()->set_previous(nullptr);
  // Set extension and global object.
  native_context()->set_extension(*global_object);
  // Security setup: Set the security token of the native context to the global
  // object. This makes the security check between two different contexts fail
  // by default even in case of global object reinitialization.
  native_context()->set_security_token(*global_object);

  Isolate* isolate = global_object->GetIsolate();
  Factory* factory = isolate->factory();

  Handle<ScriptContextTable> script_context_table =
      factory->NewScriptContextTable();
  native_context()->set_script_context_table(*script_context_table);
  InstallGlobalThisBinding();

  {  // --- O b j e c t ---
    Handle<String> object_name = factory->Object_string();
    Handle<JSFunction> object_function = isolate->object_function();
    JSObject::AddProperty(global_object, object_name, object_function,
                          DONT_ENUM);

    SimpleInstallFunction(object_function, factory->assign_string(),
                          Builtins::kObjectAssign, 2, false);
    SimpleInstallFunction(object_function, "getOwnPropertyDescriptor",
                          Builtins::kObjectGetOwnPropertyDescriptor, 2, false);
    SimpleInstallFunction(object_function,
                          factory->getOwnPropertyDescriptors_string(),
                          Builtins::kObjectGetOwnPropertyDescriptors, 1, false);
    SimpleInstallFunction(object_function, "getOwnPropertyNames",
                          Builtins::kObjectGetOwnPropertyNames, 1, false);
    SimpleInstallFunction(object_function, "getOwnPropertySymbols",
                          Builtins::kObjectGetOwnPropertySymbols, 1, false);
    SimpleInstallFunction(object_function, "is",
                          Builtins::kObjectIs, 2, true);
    SimpleInstallFunction(object_function, "preventExtensions",
                          Builtins::kObjectPreventExtensions, 1, false);
    SimpleInstallFunction(object_function, "seal",
                          Builtins::kObjectSeal, 1, false);

    Handle<JSFunction> object_create =
        SimpleInstallFunction(object_function, factory->create_string(),
                              Builtins::kObjectCreate, 2, false);
    native_context()->set_object_create(*object_create);

    Handle<JSFunction> object_define_properties = SimpleInstallFunction(
        object_function, "defineProperties",
        Builtins::kObjectDefineProperties, 2, true);
    native_context()->set_object_define_properties(*object_define_properties);

    Handle<JSFunction> object_define_property = SimpleInstallFunction(
        object_function, factory->defineProperty_string(),
        Builtins::kObjectDefineProperty, 3, true);
    native_context()->set_object_define_property(*object_define_property);

    SimpleInstallFunction(object_function, "freeze", Builtins::kObjectFreeze, 1,
                          false);

    Handle<JSFunction> object_get_prototype_of = SimpleInstallFunction(
        object_function, "getPrototypeOf", Builtins::kObjectGetPrototypeOf,
        1, false);
    native_context()->set_object_get_prototype_of(*object_get_prototype_of);
    SimpleInstallFunction(object_function, "setPrototypeOf",
                          Builtins::kObjectSetPrototypeOf, 2, false);

    Handle<JSFunction> object_is_extensible = SimpleInstallFunction(
        object_function, "isExtensible", Builtins::kObjectIsExtensible,
        1, false);
    native_context()->set_object_is_extensible(*object_is_extensible);

    Handle<JSFunction> object_is_frozen = SimpleInstallFunction(
        object_function, "isFrozen", Builtins::kObjectIsFrozen, 1, false);
    native_context()->set_object_is_frozen(*object_is_frozen);

    Handle<JSFunction> object_is_sealed = SimpleInstallFunction(
        object_function, "isSealed", Builtins::kObjectIsSealed, 1, false);
    native_context()->set_object_is_sealed(*object_is_sealed);

    Handle<JSFunction> object_keys = SimpleInstallFunction(
        object_function, "keys", Builtins::kObjectKeys, 1, true);
    native_context()->set_object_keys(*object_keys);
    SimpleInstallFunction(object_function, factory->entries_string(),
                          Builtins::kObjectEntries, 1, true);
    SimpleInstallFunction(object_function, factory->values_string(),
                          Builtins::kObjectValues, 1, true);

    SimpleInstallFunction(isolate->initial_object_prototype(),
                          "__defineGetter__", Builtins::kObjectDefineGetter, 2,
                          true);
    SimpleInstallFunction(isolate->initial_object_prototype(),
                          "__defineSetter__", Builtins::kObjectDefineSetter, 2,
                          true);
    SimpleInstallFunction(isolate->initial_object_prototype(), "hasOwnProperty",
                          Builtins::kObjectPrototypeHasOwnProperty, 1, true);
    SimpleInstallFunction(isolate->initial_object_prototype(),
                          "__lookupGetter__", Builtins::kObjectLookupGetter, 1,
                          true);
    SimpleInstallFunction(isolate->initial_object_prototype(),
                          "__lookupSetter__", Builtins::kObjectLookupSetter, 1,
                          true);
    SimpleInstallFunction(isolate->initial_object_prototype(), "isPrototypeOf",
                          Builtins::kObjectPrototypeIsPrototypeOf, 1, true);
    SimpleInstallFunction(
        isolate->initial_object_prototype(), "propertyIsEnumerable",
        Builtins::kObjectPrototypePropertyIsEnumerable, 1, false);
    Handle<JSFunction> object_to_string = SimpleInstallFunction(
        isolate->initial_object_prototype(), factory->toString_string(),
        Builtins::kObjectPrototypeToString, 0, true);
    native_context()->set_object_to_string(*object_to_string);
    Handle<JSFunction> object_value_of = SimpleInstallFunction(
        isolate->initial_object_prototype(), "valueOf",
        Builtins::kObjectPrototypeValueOf, 0, true);
    native_context()->set_object_value_of(*object_value_of);

    SimpleInstallGetterSetter(isolate->initial_object_prototype(),
                              factory->proto_string(),
                              Builtins::kObjectPrototypeGetProto,
                              Builtins::kObjectPrototypeSetProto, DONT_ENUM);

    SimpleInstallFunction(isolate->initial_object_prototype(), "toLocaleString",
                          Builtins::kObjectPrototypeToLocaleString, 0, true);
  }

  Handle<JSObject> global(native_context()->global_object());

  {  // --- F u n c t i o n ---
    Handle<JSFunction> prototype = empty_function;
    Handle<JSFunction> function_fun = InstallFunction(
        global, "Function", JS_FUNCTION_TYPE, JSFunction::kSizeWithPrototype, 0,
        prototype, Builtins::kFunctionConstructor);
    // Function instances are sloppy by default.
    function_fun->set_prototype_or_initial_map(*isolate->sloppy_function_map());
    function_fun->shared()->DontAdaptArguments();
    function_fun->shared()->SetConstructStub(
        *BUILTIN_CODE(isolate, FunctionConstructor));
    function_fun->shared()->set_length(1);
    InstallWithIntrinsicDefaultProto(isolate, function_fun,
                                     Context::FUNCTION_FUNCTION_INDEX);

    // Setup the methods on the %FunctionPrototype%.
    JSObject::AddProperty(prototype, factory->constructor_string(),
                          function_fun, DONT_ENUM);
    SimpleInstallFunction(prototype, factory->apply_string(),
                          Builtins::kFunctionPrototypeApply, 2, false);
    SimpleInstallFunction(prototype, factory->bind_string(),
                          Builtins::kFastFunctionPrototypeBind, 1, false);
    SimpleInstallFunction(prototype, factory->call_string(),
                          Builtins::kFunctionPrototypeCall, 1, false);
    SimpleInstallFunction(prototype, factory->toString_string(),
                          Builtins::kFunctionPrototypeToString, 0, false);

    // Install the @@hasInstance function.
    Handle<JSFunction> has_instance = SimpleInstallFunction(
        prototype, factory->has_instance_symbol(), "[Symbol.hasInstance]",
        Builtins::kFunctionPrototypeHasInstance, 1, true,
        static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY),
        kFunctionHasInstance);
    native_context()->set_function_has_instance(*has_instance);

    // Complete setting up function maps.
    {
      isolate->sloppy_function_map()->SetConstructor(*function_fun);
      isolate->sloppy_function_with_name_map()->SetConstructor(*function_fun);
      isolate->sloppy_function_with_readonly_prototype_map()->SetConstructor(
          *function_fun);

      isolate->strict_function_map()->SetConstructor(*function_fun);
      isolate->strict_function_with_name_map()->SetConstructor(*function_fun);
      strict_function_with_home_object_map_->SetConstructor(*function_fun);
      strict_function_with_name_and_home_object_map_->SetConstructor(
          *function_fun);
      isolate->strict_function_with_readonly_prototype_map()->SetConstructor(
          *function_fun);

      isolate->class_function_map()->SetConstructor(*function_fun);
    }
  }

  {  // --- A s y n c F r o m S y n c I t e r a t o r
    Handle<SharedFunctionInfo> info = SimpleCreateSharedFunctionInfo(
        isolate, Builtins::kAsyncIteratorValueUnwrap, factory->empty_string(),
        1);
    native_context()->set_async_iterator_value_unwrap_shared_fun(*info);
  }

  {  // --- A s y n c G e n e r a t o r ---
    Handle<JSFunction> await_caught =
        SimpleCreateFunction(isolate, factory->empty_string(),
                             Builtins::kAsyncGeneratorAwaitCaught, 1, false);
    native_context()->set_async_generator_await_caught(*await_caught);

    Handle<JSFunction> await_uncaught =
        SimpleCreateFunction(isolate, factory->empty_string(),
                             Builtins::kAsyncGeneratorAwaitUncaught, 1, false);
    native_context()->set_async_generator_await_uncaught(*await_uncaught);

    Handle<SharedFunctionInfo> info = SimpleCreateSharedFunctionInfo(
        isolate, Builtins::kAsyncGeneratorAwaitResolveClosure,
        factory->empty_string(), 1);
    native_context()->set_async_generator_await_resolve_shared_fun(*info);

    info = SimpleCreateSharedFunctionInfo(
        isolate, Builtins::kAsyncGeneratorAwaitRejectClosure,
        factory->empty_string(), 1);
    native_context()->set_async_generator_await_reject_shared_fun(*info);

    info = SimpleCreateSharedFunctionInfo(
        isolate, Builtins::kAsyncGeneratorYieldResolveClosure,
        factory->empty_string(), 1);
    native_context()->set_async_generator_yield_resolve_shared_fun(*info);

    info = SimpleCreateSharedFunctionInfo(
        isolate, Builtins::kAsyncGeneratorReturnResolveClosure,
        factory->empty_string(), 1);
    native_context()->set_async_generator_return_resolve_shared_fun(*info);

    info = SimpleCreateSharedFunctionInfo(
        isolate, Builtins::kAsyncGeneratorReturnClosedResolveClosure,
        factory->empty_string(), 1);
    native_context()->set_async_generator_return_closed_resolve_shared_fun(
        *info);

    info = SimpleCreateSharedFunctionInfo(
        isolate, Builtins::kAsyncGeneratorReturnClosedRejectClosure,
        factory->empty_string(), 1);
    native_context()->set_async_generator_return_closed_reject_shared_fun(
        *info);
  }

  {  // --- A r r a y ---
    Handle<JSFunction> array_function = InstallFunction(
        global, "Array", JS_ARRAY_TYPE, JSArray::kSize, 0,
        isolate->initial_object_prototype(), Builtins::kArrayConstructor);
    array_function->shared()->DontAdaptArguments();
    array_function->shared()->set_builtin_function_id(kArrayConstructor);

    // This seems a bit hackish, but we need to make sure Array.length
    // is 1.
    array_function->shared()->set_length(1);

    Handle<Map> initial_map(array_function->initial_map());

    // This assert protects an optimization in
    // HGraphBuilder::JSArrayBuilder::EmitMapCode()
    DCHECK(initial_map->elements_kind() == GetInitialFastElementsKind());
    Map::EnsureDescriptorSlack(initial_map, 1);

    PropertyAttributes attribs = static_cast<PropertyAttributes>(
        DONT_ENUM | DONT_DELETE);

    {  // Add length.
      Descriptor d = Descriptor::AccessorConstant(
          factory->length_string(), factory->array_length_accessor(), attribs);
      initial_map->AppendDescriptor(&d);
    }

    InstallWithIntrinsicDefaultProto(isolate, array_function,
                                     Context::ARRAY_FUNCTION_INDEX);
    InstallSpeciesGetter(array_function);

    // Cache the array maps, needed by ArrayConstructorStub
    CacheInitialJSArrayMaps(native_context(), initial_map);
    ArrayConstructorStub array_constructor_stub(isolate);
    Handle<Code> code = array_constructor_stub.GetCode();
    array_function->shared()->SetConstructStub(*code);

    // Set up %ArrayPrototype%.
    // The %ArrayPrototype% has TERMINAL_FAST_ELEMENTS_KIND in order to ensure
    // that constant functions stay constant after turning prototype to setup
    // mode and back when constant field tracking is enabled.
    Handle<JSArray> proto =
        factory->NewJSArray(0, TERMINAL_FAST_ELEMENTS_KIND, TENURED);
    JSFunction::SetPrototype(array_function, proto);
    native_context()->set_initial_array_prototype(*proto);

    Handle<JSFunction> is_arraylike = SimpleInstallFunction(
        array_function, "isArray", Builtins::kArrayIsArray, 1, true);
    native_context()->set_is_arraylike(*is_arraylike);

    JSObject::AddProperty(proto, factory->constructor_string(), array_function,
                          DONT_ENUM);

    SimpleInstallFunction(proto, "concat", Builtins::kArrayConcat, 1, false);
    SimpleInstallFunction(proto, "find", Builtins::kArrayPrototypeFind, 1,
                          false);
    SimpleInstallFunction(proto, "findIndex",
                          Builtins::kArrayPrototypeFindIndex, 1, false);
    SimpleInstallFunction(proto, "pop", Builtins::kArrayPrototypePop, 0, false);
    SimpleInstallFunction(proto, "push", Builtins::kArrayPrototypePush, 1,
                          false);
    SimpleInstallFunction(proto, "shift", Builtins::kArrayPrototypeShift, 0,
                          false);
    SimpleInstallFunction(proto, "unshift", Builtins::kArrayUnshift, 1, false);
    if (FLAG_enable_experimental_builtins) {
      SimpleInstallFunction(proto, "slice", Builtins::kArrayPrototypeSlice, 2,
                            false);
    } else {
      SimpleInstallFunction(proto, "slice", Builtins::kArraySlice, 2, false);
    }
    SimpleInstallFunction(proto, "splice", Builtins::kArraySplice, 2, false);
    SimpleInstallFunction(proto, "includes", Builtins::kArrayIncludes, 1,
                          false);
    SimpleInstallFunction(proto, "indexOf", Builtins::kArrayIndexOf, 1, false);
    SimpleInstallFunction(proto, "keys", Builtins::kArrayPrototypeKeys, 0, true,
                          kArrayKeys);
    SimpleInstallFunction(proto, "entries", Builtins::kArrayPrototypeEntries, 0,
                          true, kArrayEntries);
    SimpleInstallFunction(proto, factory->iterator_symbol(), "values",
                          Builtins::kArrayPrototypeValues, 0, true, DONT_ENUM,
                          kArrayValues);
    SimpleInstallFunction(proto, "forEach", Builtins::kArrayForEach, 1, false);
    SimpleInstallFunction(proto, "filter", Builtins::kArrayFilter, 1, false);
    SimpleInstallFunction(proto, "map", Builtins::kArrayMap, 1, false);
    SimpleInstallFunction(proto, "every", Builtins::kArrayEvery, 1, false);
    SimpleInstallFunction(proto, "some", Builtins::kArraySome, 1, false);
    SimpleInstallFunction(proto, "reduce", Builtins::kArrayReduce, 1, false);
    SimpleInstallFunction(proto, "reduceRight", Builtins::kArrayReduceRight, 1,
                          false);
  }

  {  // --- A r r a y I t e r a t o r ---
    Handle<JSObject> iterator_prototype(
        native_context()->initial_iterator_prototype());

    Handle<JSObject> array_iterator_prototype =
        factory->NewJSObject(isolate->object_function(), TENURED);
    JSObject::ForceSetPrototype(array_iterator_prototype, iterator_prototype);

    JSObject::AddProperty(
        array_iterator_prototype, factory->to_string_tag_symbol(),
        factory->ArrayIterator_string(),
        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

    SimpleInstallFunction(array_iterator_prototype, "next",
                          Builtins::kArrayIteratorPrototypeNext, 0, true,
                          kArrayIteratorNext);

    Handle<JSFunction> array_iterator_function = CreateFunction(
        isolate, factory->ArrayIterator_string(),
        JS_FAST_ARRAY_VALUE_ITERATOR_TYPE, JSArrayIterator::kSize, 0,
        array_iterator_prototype, Builtins::kIllegal);
    array_iterator_function->shared()->set_native(false);
    array_iterator_function->shared()->set_instance_class_name(
        isolate->heap()->ArrayIterator_string());

    native_context()->set_initial_array_iterator_prototype(
        *array_iterator_prototype);
    native_context()->set_initial_array_iterator_prototype_map(
        array_iterator_prototype->map());

    Handle<Map> initial_map(array_iterator_function->initial_map(), isolate);

#define ARRAY_ITERATOR_LIST(V)                                              \
  V(TYPED_ARRAY, KEY, typed_array, key)                                     \
  V(FAST_ARRAY, KEY, fast_array, key)                                       \
  V(GENERIC_ARRAY, KEY, array, key)                                         \
  V(UINT8_ARRAY, KEY_VALUE, uint8_array, key_value)                         \
  V(INT8_ARRAY, KEY_VALUE, int8_array, key_value)                           \
  V(UINT16_ARRAY, KEY_VALUE, uint16_array, key_value)                       \
  V(INT16_ARRAY, KEY_VALUE, int16_array, key_value)                         \
  V(UINT32_ARRAY, KEY_VALUE, uint32_array, key_value)                       \
  V(INT32_ARRAY, KEY_VALUE, int32_array, key_value)                         \
  V(FLOAT32_ARRAY, KEY_VALUE, float32_array, key_value)                     \
  V(FLOAT64_ARRAY, KEY_VALUE, float64_array, key_value)                     \
  V(UINT8_CLAMPED_ARRAY, KEY_VALUE, uint8_clamped_array, key_value)         \
  V(FAST_SMI_ARRAY, KEY_VALUE, fast_smi_array, key_value)                   \
  V(FAST_HOLEY_SMI_ARRAY, KEY_VALUE, fast_holey_smi_array, key_value)       \
  V(FAST_ARRAY, KEY_VALUE, fast_array, key_value)                           \
  V(FAST_HOLEY_ARRAY, KEY_VALUE, fast_holey_array, key_value)               \
  V(FAST_DOUBLE_ARRAY, KEY_VALUE, fast_double_array, key_value)             \
  V(FAST_HOLEY_DOUBLE_ARRAY, KEY_VALUE, fast_holey_double_array, key_value) \
  V(GENERIC_ARRAY, KEY_VALUE, array, key_value)                             \
  V(UINT8_ARRAY, VALUE, uint8_array, value)                                 \
  V(INT8_ARRAY, VALUE, int8_array, value)                                   \
  V(UINT16_ARRAY, VALUE, uint16_array, value)                               \
  V(INT16_ARRAY, VALUE, int16_array, value)                                 \
  V(UINT32_ARRAY, VALUE, uint32_array, value)                               \
  V(INT32_ARRAY, VALUE, int32_array, value)                                 \
  V(FLOAT32_ARRAY, VALUE, float32_array, value)                             \
  V(FLOAT64_ARRAY, VALUE, float64_array, value)                             \
  V(UINT8_CLAMPED_ARRAY, VALUE, uint8_clamped_array, value)                 \
  V(FAST_SMI_ARRAY, VALUE, fast_smi_array, value)                           \
  V(FAST_HOLEY_SMI_ARRAY, VALUE, fast_holey_smi_array, value)               \
  V(FAST_ARRAY, VALUE, fast_array, value)                                   \
  V(FAST_HOLEY_ARRAY, VALUE, fast_holey_array, value)                       \
  V(FAST_DOUBLE_ARRAY, VALUE, fast_double_array, value)                     \
  V(FAST_HOLEY_DOUBLE_ARRAY, VALUE, fast_holey_double_array, value)         \
  V(GENERIC_ARRAY, VALUE, array, value)

#define CREATE_ARRAY_ITERATOR_MAP(PREFIX, SUFFIX, prefix, suffix)           \
  do {                                                                      \
    const InstanceType type = JS_##PREFIX##_##SUFFIX##_ITERATOR_TYPE;       \
    Handle<Map> map =                                                       \
        Map::Copy(initial_map, "JS_" #PREFIX "_" #SUFFIX "_ITERATOR_TYPE"); \
    map->set_instance_type(type);                                           \
    native_context()->set_##prefix##_##suffix##_iterator_map(*map);         \
  } while (0);

    ARRAY_ITERATOR_LIST(CREATE_ARRAY_ITERATOR_MAP)

#undef CREATE_ARRAY_ITERATOR_MAP
#undef ARRAY_ITERATOR_LIST
  }

  {  // --- N u m b e r ---
    Handle<JSFunction> number_fun = InstallFunction(
        global, "Number", JS_VALUE_TYPE, JSValue::kSize, 0,
        isolate->initial_object_prototype(), Builtins::kNumberConstructor);
    number_fun->shared()->set_builtin_function_id(kNumberConstructor);
    number_fun->shared()->DontAdaptArguments();
    number_fun->shared()->SetConstructStub(
        *BUILTIN_CODE(isolate, NumberConstructor_ConstructStub));
    number_fun->shared()->set_length(1);
    InstallWithIntrinsicDefaultProto(isolate, number_fun,
                                     Context::NUMBER_FUNCTION_INDEX);

    // Create the %NumberPrototype%
    Handle<JSValue> prototype =
        Handle<JSValue>::cast(factory->NewJSObject(number_fun, TENURED));
    prototype->set_value(Smi::kZero);
    JSFunction::SetPrototype(number_fun, prototype);

    // Install the "constructor" property on the {prototype}.
    JSObject::AddProperty(prototype, factory->constructor_string(), number_fun,
                          DONT_ENUM);

    // Install the Number.prototype methods.
    SimpleInstallFunction(prototype, "toExponential",
                          Builtins::kNumberPrototypeToExponential, 1, false);
    SimpleInstallFunction(prototype, "toFixed",
                          Builtins::kNumberPrototypeToFixed, 1, false);
    SimpleInstallFunction(prototype, "toPrecision",
                          Builtins::kNumberPrototypeToPrecision, 1, false);
    SimpleInstallFunction(prototype, "toString",
                          Builtins::kNumberPrototypeToString, 1, false);
    SimpleInstallFunction(prototype, "valueOf",
                          Builtins::kNumberPrototypeValueOf, 0, true);

    // Install Intl fallback functions.
    SimpleInstallFunction(prototype, "toLocaleString",
                          Builtins::kNumberPrototypeToLocaleString, 0, false);

    // Install the Number functions.
    SimpleInstallFunction(number_fun, "isFinite", Builtins::kNumberIsFinite, 1,
                          true);
    SimpleInstallFunction(number_fun, "isInteger", Builtins::kNumberIsInteger,
                          1, true);
    SimpleInstallFunction(number_fun, "isNaN", Builtins::kNumberIsNaN, 1, true);
    SimpleInstallFunction(number_fun, "isSafeInteger",
                          Builtins::kNumberIsSafeInteger, 1, true);

    // Install Number.parseFloat and Global.parseFloat.
    Handle<JSFunction> parse_float_fun = SimpleInstallFunction(
        number_fun, "parseFloat", Builtins::kNumberParseFloat, 1, true);
    JSObject::AddProperty(global_object,
                          factory->NewStringFromAsciiChecked("parseFloat"),
                          parse_float_fun, DONT_ENUM);

    // Install Number.parseInt and Global.parseInt.
    Handle<JSFunction> parse_int_fun = SimpleInstallFunction(
        number_fun, "parseInt", Builtins::kNumberParseInt, 2, true);
    JSObject::AddProperty(global_object,
                          factory->NewStringFromAsciiChecked("parseInt"),
                          parse_int_fun, DONT_ENUM);

    // Install Number constants
    double kMaxValue = 1.7976931348623157e+308;
    double kMinValue = 5e-324;

    double kMaxSafeInt = 9007199254740991;
    double kMinSafeInt = -9007199254740991;
    double kEPS = 2.220446049250313e-16;

    Handle<Object> infinity = factory->infinity_value();
    Handle<Object> nan = factory->nan_value();
    Handle<String> nan_name = factory->NewStringFromAsciiChecked("NaN");

    JSObject::AddProperty(
        number_fun, factory->NewStringFromAsciiChecked("MAX_VALUE"),
        factory->NewNumber(kMaxValue),
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
    JSObject::AddProperty(
        number_fun, factory->NewStringFromAsciiChecked("MIN_VALUE"),
        factory->NewNumber(kMinValue),
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
    JSObject::AddProperty(
        number_fun, nan_name, nan,
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
    JSObject::AddProperty(
        number_fun, factory->NewStringFromAsciiChecked("NEGATIVE_INFINITY"),
        factory->NewNumber(-V8_INFINITY),
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
    JSObject::AddProperty(
        number_fun, factory->NewStringFromAsciiChecked("POSITIVE_INFINITY"),
        infinity,
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
    JSObject::AddProperty(
        number_fun, factory->NewStringFromAsciiChecked("MAX_SAFE_INTEGER"),
        factory->NewNumber(kMaxSafeInt),
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
    JSObject::AddProperty(
        number_fun, factory->NewStringFromAsciiChecked("MIN_SAFE_INTEGER"),
        factory->NewNumber(kMinSafeInt),
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
    JSObject::AddProperty(
        number_fun, factory->NewStringFromAsciiChecked("EPSILON"),
        factory->NewNumber(kEPS),
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));

    JSObject::AddProperty(
        global, factory->NewStringFromAsciiChecked("Infinity"), infinity,
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
    JSObject::AddProperty(
        global, nan_name, nan,
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
    JSObject::AddProperty(
        global, factory->NewStringFromAsciiChecked("undefined"),
        factory->undefined_value(),
        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY));
  }

  {  // --- B o o l e a n ---
    Handle<JSFunction> boolean_fun = InstallFunction(
        global, "Boolean", JS_VALUE_TYPE, JSValue::kSize, 0,
        isolate->initial_object_prototype(), Builtins::kBooleanConstructor);
    boolean_fun->shared()->DontAdaptArguments();
    boolean_fun->shared()->SetConstructStub(
        *BUILTIN_CODE(isolate, BooleanConstructor_ConstructStub));
    boolean_fun->shared()->set_length(1);
    InstallWithIntrinsicDefaultProto(isolate, boolean_fun,
                                     Context::BOOLEAN_FUNCTION_INDEX);

    // Create the %BooleanPrototype%
    Handle<JSValue> prototype =
        Handle<JSValue>::cast(factory->NewJSObject(boolean_fun, TENURED));
    prototype->set_value(isolate->heap()->false_value());
    JSFunction::SetPrototype(boolean_fun, prototype);

    // Install the "constructor" property on the {prototype}.
    JSObject::AddProperty(prototype, factory->constructor_string(), boolean_fun,
                          DONT_ENUM);

    // Install the Boolean.prototype methods.
    SimpleInstallFunction(prototype, "toString",
                          Builtins::kBooleanPrototypeToString, 0, true);
    SimpleInstallFunction(prototype, "valueOf",
                          Builtins::kBooleanPrototypeValueOf, 0, true);
  }

  {  // --- S t r i n g ---
    Handle<JSFunction> string_fun = InstallFunction(
        global, "String", JS_VALUE_TYPE, JSValue::kSize, 0,
        isolate->initial_object_prototype(), Builtins::kStringConstructor);
    string_fun->shared()->set_builtin_function_id(kStringConstructor);
    string_fun->shared()->SetConstructStub(
        *BUILTIN_CODE(isolate, StringConstructor_ConstructStub));
    string_fun->shared()->DontAdaptArguments();
    string_fun->shared()->set_length(1);
    InstallWithIntrinsicDefaultProto(isolate, string_fun,
                                     Context::STRING_FUNCTION_INDEX);

    Handle<Map> string_map =
        Handle<Map>(native_context()->string_function()->initial_map());
    string_map->set_elements_kind(FAST_STRING_WRAPPER_ELEMENTS);
    Map::EnsureDescriptorSlack(string_map, 1);

    PropertyAttributes attribs = static_cast<PropertyAttributes>(
        DONT_ENUM | DONT_DELETE | READ_ONLY);

    {  // Add length.
      Descriptor d = Descriptor::AccessorConstant(
          factory->length_string(), factory->string_length_accessor(), attribs);
      string_map->AppendDescriptor(&d);
    }

    // Install the String.fromCharCode function.
    SimpleInstallFunction(string_fun, "fromCharCode",
                          Builtins::kStringFromCharCode, 1, false);

    // Install the String.fromCodePoint function.
    SimpleInstallFunction(string_fun, "fromCodePoint",
                          Builtins::kStringFromCodePoint, 1, false);

    // Install the String.raw function.
    SimpleInstallFunction(string_fun, "raw", Builtins::kStringRaw, 1, false);

    // Create the %StringPrototype%
    Handle<JSValue> prototype =
        Handle<JSValue>::cast(factory->NewJSObject(string_fun, TENURED));
    prototype->set_value(isolate->heap()->empty_string());
    JSFunction::SetPrototype(string_fun, prototype);
    native_context()->set_initial_string_prototype(*prototype);

    // Install the "constructor" property on the {prototype}.
    JSObject::AddProperty(prototype, factory->constructor_string(), string_fun,
                          DONT_ENUM);

    // Install the String.prototype methods.
    SimpleInstallFunction(prototype, "anchor", Builtins::kStringPrototypeAnchor,
                          1, true);
    SimpleInstallFunction(prototype, "big", Builtins::kStringPrototypeBig, 0,
                          true);
    SimpleInstallFunction(prototype, "blink", Builtins::kStringPrototypeBlink,
                          0, true);
    SimpleInstallFunction(prototype, "bold", Builtins::kStringPrototypeBold, 0,
                          true);
    SimpleInstallFunction(prototype, "charAt", Builtins::kStringPrototypeCharAt,
                          1, true);
    SimpleInstallFunction(prototype, "charCodeAt",
                          Builtins::kStringPrototypeCharCodeAt, 1, true);
    SimpleInstallFunction(prototype, "codePointAt",
                          Builtins::kStringPrototypeCodePointAt, 1, true);
    SimpleInstallFunction(prototype, "concat", Builtins::kStringPrototypeConcat,
                          1, false);
    SimpleInstallFunction(prototype, "endsWith",
                          Builtins::kStringPrototypeEndsWith, 1, false);
    SimpleInstallFunction(prototype, "fontcolor",
                          Builtins::kStringPrototypeFontcolor, 1, true);
    SimpleInstallFunction(prototype, "fontsize",
                          Builtins::kStringPrototypeFontsize, 1, true);
    SimpleInstallFunction(prototype, "fixed", Builtins::kStringPrototypeFixed,
                          0, true);
    SimpleInstallFunction(prototype, "includes",
                          Builtins::kStringPrototypeIncludes, 1, false);
    SimpleInstallFunction(prototype, "indexOf",
                          Builtins::kStringPrototypeIndexOf, 1, false);
    SimpleInstallFunction(prototype, "italics",
                          Builtins::kStringPrototypeItalics, 0, true);
    SimpleInstallFunction(prototype, "lastIndexOf",
                          Builtins::kStringPrototypeLastIndexOf, 1, false);
    SimpleInstallFunction(prototype, "link", Builtins::kStringPrototypeLink, 1,
                          true);
    SimpleInstallFunction(prototype, "localeCompare",
                          Builtins::kStringPrototypeLocaleCompare, 1, true);
    SimpleInstallFunction(prototype, "match", Builtins::kStringPrototypeMatch,
                          1, true);
#ifdef V8_INTL_SUPPORT
    SimpleInstallFunction(prototype, "normalize",
                          Builtins::kStringPrototypeNormalizeIntl, 0, false);
#else
    SimpleInstallFunction(prototype, "normalize",
                          Builtins::kStringPrototypeNormalize, 0, false);
#endif  // V8_INTL_SUPPORT
    SimpleInstallFunction(prototype, "padEnd", Builtins::kStringPrototypePadEnd,
                          1, false);
    SimpleInstallFunction(prototype, "padStart",
                          Builtins::kStringPrototypePadStart, 1, false);
    SimpleInstallFunction(prototype, "repeat", Builtins::kStringPrototypeRepeat,
                          1, true);
    SimpleInstallFunction(prototype, "replace",
                          Builtins::kStringPrototypeReplace, 2, true);
    SimpleInstallFunction(prototype, "search", Builtins::kStringPrototypeSearch,
                          1, true);
    SimpleInstallFunction(prototype, "slice", Builtins::kStringPrototypeSlice,
                          2, false);
    SimpleInstallFunction(prototype, "small", Builtins::kStringPrototypeSmall,
                          0, true);
    SimpleInstallFunction(prototype, "split", Builtins::kStringPrototypeSplit,
                          2, false);
    SimpleInstallFunction(prototype, "strike", Builtins::kStringPrototypeStrike,
                          0, true);
    SimpleInstallFunction(prototype, "sub", Builtins::kStringPrototypeSub, 0,
                          true);
    SimpleInstallFunction(prototype, "substr", Builtins::kStringPrototypeSubstr,
                          2, false);
    SimpleInstallFunction(prototype, "substring",
                          Builtins::kStringPrototypeSubstring, 2, false);
    SimpleInstallFunction(prototype, "sup", Builtins::kStringPrototypeSup, 0,
                          true);
    SimpleInstallFunction(prototype, "startsWith",
                          Builtins::kStringPrototypeStartsWith, 1, false);
    SimpleInstallFunction(prototype, "toString",
                          Builtins::kStringPrototypeToString, 0, true);
    SimpleInstallFunction(prototype, "trim", Builtins::kStringPrototypeTrim, 0,
                          false);
    SimpleInstallFunction(prototype, "trimLeft",
                          Builtins::kStringPrototypeTrimLeft, 0, false);
    SimpleInstallFunction(prototype, "trimRight",
                          Builtins::kStringPrototypeTrimRight, 0, false);
#ifdef V8_INTL_SUPPORT
    SimpleInstallFunction(prototype, "toLowerCase",
                          Builtins::kStringPrototypeToLowerCaseIntl, 0, true);
    SimpleInstallFunction(prototype, "toUpperCase",
                          Builtins::kStringPrototypeToUpperCaseIntl, 0, false);
#else
    SimpleInstallFunction(prototype, "toLocaleLowerCase",
                          Builtins::kStringPrototypeToLocaleLowerCase, 0,
                          false);
    SimpleInstallFunction(prototype, "toLocaleUpperCase",
                          Builtins::kStringPrototypeToLocaleUpperCase, 0,
                          false);
    SimpleInstallFunction(prototype, "toLowerCase",
                          Builtins::kStringPrototypeToLowerCase, 0, false);
    SimpleInstallFunction(prototype, "toUpperCase",
                          Builtins::kStringPrototypeToUpperCase, 0, false);
#endif
    SimpleInstallFunction(prototype, "valueOf",
                          Builtins::kStringPrototypeValueOf, 0, true);

    SimpleInstallFunction(prototype, factory->iterator_symbol(),
                          "[Symbol.iterator]",
                          Builtins::kStringPrototypeIterator, 0, true,
                          DONT_ENUM, kStringIterator);
  }

  {  // --- S t r i n g I t e r a t o r ---
    Handle<JSObject> iterator_prototype(
        native_context()->initial_iterator_prototype());

    Handle<JSObject> string_iterator_prototype =
        factory->NewJSObject(isolate->object_function(), TENURED);
    JSObject::ForceSetPrototype(string_iterator_prototype, iterator_prototype);

    JSObject::AddProperty(
        string_iterator_prototype, factory->to_string_tag_symbol(),
        factory->NewStringFromAsciiChecked("String Iterator"),
        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

    SimpleInstallFunction(string_iterator_prototype, "next",
                          Builtins::kStringIteratorPrototypeNext, 0, true,
                          kStringIteratorNext);

    Handle<JSFunction> string_iterator_function = CreateFunction(
        isolate, factory->NewStringFromAsciiChecked("StringIterator"),
        JS_STRING_ITERATOR_TYPE, JSStringIterator::kSize, 0,
        string_iterator_prototype, Builtins::kIllegal);
    string_iterator_function->shared()->set_native(false);
    native_context()->set_string_iterator_map(
        string_iterator_function->initial_map());
  }

  {  // --- S y m b o l ---
    Handle<JSFunction> symbol_fun = InstallFunction(
        global, "Symbol", JS_VALUE_TYPE, JSValue::kSize, 0,
        factory->the_hole_value(), Builtins::kSymbolConstructor);
    symbol_fun->shared()->set_builtin_function_id(kSymbolConstructor);
    symbol_fun->shared()->SetConstructStub(
        *BUILTIN_CODE(isolate, SymbolConstructor_ConstructStub));
    symbol_fun->shared()->set_length(0);
    symbol_fun->shared()->DontAdaptArguments();
    native_context()->set_symbol_function(*symbol_fun);

    // Install the Symbol.for and Symbol.keyFor functions.
    SimpleInstallFunction(symbol_fun, "for", Builtins::kSymbolFor, 1, false);
    SimpleInstallFunction(symbol_fun, "keyFor", Builtins::kSymbolKeyFor, 1,
                          false);

    // Install well-known symbols.
    InstallConstant(isolate, symbol_fun, "asyncIterator",
                    factory->async_iterator_symbol());
    InstallConstant(isolate, symbol_fun, "hasInstance",
                    factory->has_instance_symbol());
    InstallConstant(isolate, symbol_fun, "isConcatSpreadable",
                    factory->is_concat_spreadable_symbol());
    InstallConstant(isolate, symbol_fun, "iterator",
                    factory->iterator_symbol());
    InstallConstant(isolate, symbol_fun, "match", factory->match_symbol());
    InstallConstant(isolate, symbol_fun, "replace", factory->replace_symbol());
    InstallConstant(isolate, symbol_fun, "search", factory->search_symbol());
    InstallConstant(isolate, symbol_fun, "species", factory->species_symbol());
    InstallConstant(isolate, symbol_fun, "split", factory->split_symbol());
    InstallConstant(isolate, symbol_fun, "toPrimitive",
                    factory->to_primitive_symbol());
    InstallConstant(isolate, symbol_fun, "toStringTag",
                    factory->to_string_tag_symbol());
    InstallConstant(isolate, symbol_fun, "unscopables",
                    factory->unscopables_symbol());

    // Setup %SymbolPrototype%.
    Handle<JSObject> prototype(
        JSObject::cast(symbol_fun->instance_prototype()));

    // Install the @@toStringTag property on the {prototype}.
    JSObject::AddProperty(
        prototype, factory->to_string_tag_symbol(),
        factory->NewStringFromAsciiChecked("Symbol"),
        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

    // Install the Symbol.prototype methods.
    SimpleInstallFunction(prototype, "toString",
                          Builtins::kSymbolPrototypeToString, 0, true);
    SimpleInstallFunction(prototype, "valueOf",
                          Builtins::kSymbolPrototypeValueOf, 0, true);

    // Install the @@toPrimitive function.
    Handle<JSFunction> to_primitive = InstallFunction(
        prototype, factory->to_primitive_symbol(), JS_OBJECT_TYPE,
        JSObject::kHeaderSize, 0, MaybeHandle<JSObject>(),
        Builtins::kSymbolPrototypeToPrimitive,
        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

    // Set the expected parameters for @@toPrimitive to 1; required by builtin.
    to_primitive->shared()->set_internal_formal_parameter_count(1);

    // Set the length for the function to satisfy ECMA-262.
    to_primitive->shared()->set_length(1);
  }

  {  // --- D a t e ---
    Handle<JSFunction> date_fun =
        InstallFunction(global, "Date", JS_DATE_TYPE, JSDate::kSize, 0,
                        factory->the_hole_value(), Builtins::kDateConstructor);
    InstallWithIntrinsicDefaultProto(isolate, date_fun,
                                     Context::DATE_FUNCTION_INDEX);
    date_fun->shared()->SetConstructStub(
        *BUILTIN_CODE(isolate, DateConstructor_ConstructStub));
    date_fun->shared()->set_length(7);
    date_fun->shared()->DontAdaptArguments();

    // Install the Date.now, Date.parse and Date.UTC functions.
    SimpleInstallFunction(date_fun, "now", Builtins::kDateNow, 0, false);
    SimpleInstallFunction(date_fun, "parse", Builtins::kDateParse, 1, false);
    SimpleInstallFunction(date_fun, "UTC", Builtins::kDateUTC, 7, false);

    // Setup %DatePrototype%.
    Handle<JSObject> prototype(JSObject::cast(date_fun->instance_prototype()));

    // Install the Date.prototype methods.
    SimpleInstallFunction(prototype, "toString",
                          Builtins::kDatePrototypeToString, 0, false);
    SimpleInstallFunction(prototype, "toDateString",
                          Builtins::kDatePrototypeToDateString, 0, false);
    SimpleInstallFunction(prototype, "toTimeString",
                          Builtins::kDatePrototypeToTimeString, 0, false);
    SimpleInstallFunction(prototype, "toISOString",
                          Builtins::kDatePrototypeToISOString, 0, false);
    Handle<JSFunction> to_utc_string =
        SimpleInstallFunction(prototype, "toUTCString",
                              Builtins::kDatePrototypeToUTCString, 0, false);
    InstallFunction(prototype, to_utc_string,
                    factory->InternalizeUtf8String("toGMTString"), DONT_ENUM);
    SimpleInstallFunction(prototype, "getDate", Builtins::kDatePrototypeGetDate,
                          0, true);
    SimpleInstallFunction(prototype, "setDate", Builtins::kDatePrototypeSetDate,
                          1, false);
    SimpleInstallFunction(prototype, "getDay", Builtins::kDatePrototypeGetDay,
                          0, true);
    SimpleInstallFunction(prototype, "getFullYear",
                          Builtins::kDatePrototypeGetFullYear, 0, true);
    SimpleInstallFunction(prototype, "setFullYear",
                          Builtins::kDatePrototypeSetFullYear, 3, false);
    SimpleInstallFunction(prototype, "getHours",
                          Builtins::kDatePrototypeGetHours, 0, true);
    SimpleInstallFunction(prototype, "setHours",
                          Builtins::kDatePrototypeSetHours, 4, false);
    SimpleInstallFunction(prototype, "getMilliseconds",
                          Builtins::kDatePrototypeGetMilliseconds, 0, true);
    SimpleInstallFunction(prototype, "setMilliseconds",
                          Builtins::kDatePrototypeSetMilliseconds, 1, false);
    SimpleInstallFunction(prototype, "getMinutes",
                          Builtins::kDatePrototypeGetMinutes, 0, true);
    SimpleInstallFunction(prototype, "setMinutes",
                          Builtins::kDatePrototypeSetMinutes, 3, false);
    SimpleInstallFunction(prototype, "getMonth",
                          Builtins::kDatePrototypeGetMonth, 0, true);
    SimpleInstallFunction(prototype, "setMonth",
                          Builtins::kDatePrototypeSetMonth, 2, false);
    SimpleInstallFunction(prototype, "getSeconds",
                          Builtins::kDatePrototypeGetSeconds, 0, true);
    SimpleInstallFunction(prototype, "setSeconds",
                          Builtins::kDatePrototypeSetSeconds, 2, false);
    SimpleInstallFunction(prototype, "getTime", Builtins::kDatePrototypeGetTime,
                          0, true);
    SimpleInstallFunction(prototype, "setTime", Builtins::kDatePrototypeSetTime,
                          1, false);
    SimpleInstallFunction(prototype, "getTimezoneOffset",
                          Builtins::kDatePrototypeGetTimezoneOffset, 0, true);
    SimpleInstallFunction(prototype, "getUTCDate",
                          Builtins::kDatePrototypeGetUTCDate, 0, true);
    SimpleInstallFunction(prototype, "setUTCDate",
                          Builtins::kDatePrototypeSetUTCDate, 1, false);
    SimpleInstallFunction(prototype, "getUTCDay",
                          Builtins::kDatePrototypeGetUTCDay, 0, true);
    SimpleInstallFunction(prototype, "getUTCFullYear",
                          Builtins::kDatePrototypeGetUTCFullYear, 0, true);
    SimpleInstallFunction(prototype, "setUTCFullYear",
                          Builtins::kDatePrototypeSetUTCFullYear, 3, false);
    SimpleInstallFunction(prototype, "getUTCHours",
                          Builtins::kDatePrototypeGetUTCHours, 0, true);
    SimpleInstallFunction(prototype, "setUTCHours",
                          Builtins::kDatePrototypeSetUTCHours, 4, false);
    SimpleInstallFunction(prototype, "getUTCMilliseconds",
                          Builtins::kDatePrototypeGetUTCMilliseconds, 0, true);
    SimpleInstallFunction(prototype, "setUTCMilliseconds",
                          Builtins::kDatePrototypeSetUTCMilliseconds, 1, false);
    SimpleInstallFunction(prototype, "getUTCMinutes",
                          Builtins::kDatePrototypeGetUTCMinutes, 0, true);
    SimpleInstallFunction(prototype, "setUTCMinutes",
                          Builtins::kDatePrototypeSetUTCMinutes, 3, false);
    SimpleInstallFunction(prototype, "getUTCMonth",
                          Builtins::kDatePrototypeGetUTCMonth, 0, true);
    SimpleInstallFunction(prototype, "setUTCMonth",
                          Builtins::kDatePrototypeSetUTCMonth, 2, false);
    SimpleInstallFunction(prototype, "getUTCSeconds",
                          Builtins::kDatePrototypeGetUTCSeconds, 0, true);
    SimpleInstallFunction(prototype, "setUTCSeconds",
                          Builtins::kDatePrototypeSetUTCSeconds, 2, false);
    SimpleInstallFunction(prototype, "valueOf", Builtins::kDatePrototypeValueOf,
                          0, true);
    SimpleInstallFunction(prototype, "getYear", Builtins::kDatePrototypeGetYear,
                          0, true);
    SimpleInstallFunction(prototype, "setYear", Builtins::kDatePrototypeSetYear,
                          1, false);
    SimpleInstallFunction(prototype, "toJSON", Builtins::kDatePrototypeToJson,
                          1, false);

    // Install Intl fallback functions.
    SimpleInstallFunction(prototype, "toLocaleString",
                          Builtins::kDatePrototypeToString, 0, false);
    SimpleInstallFunction(prototype, "toLocaleDateString",
                          Builtins::kDatePrototypeToDateString, 0, false);
    SimpleInstallFunction(prototype, "toLocaleTimeString",
                          Builtins::kDatePrototypeToTimeString, 0, false);

    // Install the @@toPrimitive function.
    Handle<JSFunction> to_primitive = InstallFunction(
        prototype, factory->to_primitive_symbol(), JS_OBJECT_TYPE,
        JSObject::kHeaderSize, 0, MaybeHandle<JSObject>(),
        Builtins::kDatePrototypeToPrimitive,
        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

    // Set the expected parameters for @@toPrimitive to 1; required by builtin.
    to_primitive->shared()->set_internal_formal_parameter_count(1);

    // Set the length for the function to satisfy ECMA-262.
    to_primitive->shared()->set_length(1);
  }

  {
    Handle<SharedFunctionInfo> info = SimpleCreateSharedFunctionInfo(
        isolate, Builtins::kPromiseGetCapabilitiesExecutor,
        factory->empty_string(), factory->Object_string(), 2);
    native_context()->set_promise_get_capabilities_executor_shared_fun(*info);

    // %new_promise_capability(C, debugEvent)
    Handle<JSFunction> new_promise_capability =
        SimpleCreateFunction(isolate, factory->empty_string(),
                             Builtins::kNewPromiseCapability, 2, false);
    native_context()->set_new_promise_capability(*new_promise_capability);
  }

  {  // -- P r o m i s e
    Handle<JSFunction> promise_fun = InstallFunction(
        global, "Promise", JS_PROMISE_TYPE, JSPromise::kSizeWithEmbedderFields,
        0, factory->the_hole_value(), Builtins::kPromiseConstructor);
    InstallWithIntrinsicDefaultProto(isolate, promise_fun,
                                     Context::PROMISE_FUNCTION_INDEX);

    Handle<SharedFunctionInfo> shared(promise_fun->shared(), isolate);
    shared->SetConstructStub(*BUILTIN_CODE(isolate, JSBuiltinsConstructStub));
    shared->set_instance_class_name(isolate->heap()->Object_string());
    shared->set_internal_formal_parameter_count(1);
    shared->set_length(1);

    InstallSpeciesGetter(promise_fun);

    SimpleInstallFunction(promise_fun, "all", Builtins::kPromiseAll, 1, true);

    SimpleInstallFunction(promise_fun, "race", Builtins::kPromiseRace, 1, true);

    SimpleInstallFunction(promise_fun, "resolve",
                          Builtins::kPromiseResolveWrapper, 1, true);

    SimpleInstallFunction(promise_fun, "reject", Builtins::kPromiseReject, 1,
                          true);

    // Setup %PromisePrototype%.
    Handle<JSObject> prototype(
        JSObject::cast(promise_fun->instance_prototype()));

    // Install the @@toStringTag property on the {prototype}.
    JSObject::AddProperty(
        prototype, factory->to_string_tag_symbol(), factory->Promise_string(),
        static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY));

    Handle<JSFunction> promise_then =
        SimpleInstallFunction(prototype, isolate->factory()->then_string(),
                              Builtins::kPromisePrototypeThen, 2, true);
    native_context()->set_promise_then(*promise_then);

    Handle<JSFunction> promise_catch = SimpleInstallFunction(
        prototype, "catch", Builtins::kPromisePrototypeCatch, 1, true);
    native_context()->set_promise_catch(*promise_catch);

    // Force the Promise constructor to fast properties, so that we can use the
    // fast paths for various things like
    //
    //   x instanceof Promise
    //
    // etc. We should probably come up with a more principled approach once
    // the JavaScript builtins are gone.
    JSObject::MigrateSlowToFast(Handle<JSObject>::cast(promise_fun), 0,
                                "Bootstrapping");

    Handle<Map> prototype_map(prototype->map());
    Map::SetShouldBeFastPrototypeMap(prototype_map, true, isolate);

    // Store the initial Promise.prototype map. This is used in fast-path
    // checks. Do not alter the prototype after this point.
    native_context()->set_promise_prototype_map(*prototype_map);

    {  // Internal: PromiseInternalConstructor
       // Also exposed as extrasUtils.createPromise.
      Handle<JSFunction> function =
          SimpleCreateFunction(isolate, factory->empty_string(),
                               Builtins::kPromiseInternalConstructor, 1, true);
      function->shared()->set_native(false);
      native_context()->set_promise_internal_constructor(*function);
    }

    {  // Internal: IsPromise
      Handle<JSFunction> function = SimpleCreateFunction(
          isolate, factory->empty_string(), Builtins::kIsPromise, 1, false);
      native_context()->set_is_promise(*function);
    }

    {  // Internal: ResolvePromise
       // Also exposed as extrasUtils.resolvePromise.
      Handle<JSFunction> function = SimpleCreateFunction(
          isolate, factory->empty_string(), Builtins::kResolvePromise, 2, true);
      function->shared()->set_native(false);
      native_context()->set_promise_resolve(*function);
    }

    {  // Internal: PromiseHandle
      Handle<JSFunction> function =
          SimpleCreateFunction(isolate, factory->empty_string(),
                               Builtins::kPromiseHandleJS, 5, false);
      native_context()->set_promise_handle(*function);
    }

    {  // Internal: PromiseHandleReject
      Handle<JSFunction> function =
          SimpleCreateFunction(isolate, factory->empty_string(),
                               Builtins::kPromiseHandleReject, 3, false);
      native_context()->set_promise_handle_reject(*function);
    }

    {  // Internal: InternalPromiseReject
      Handle<JSFunction> function =
          SimpleCreateFunction(isolate, factory->empty_string(),
                               Builtins::kInternalPromiseReject, 3, true);
      function->shared()->set_native(false);
      native_context()->set_promise_internal_reject(*function);
    }

    {
      Handle<SharedFunctionInfo> info = SimpleCreateSharedFunctionInfo(
          isolate, Builtins::kPromiseResolveClosure, factory->empty_string(),
          1);
      native_context()->set_promise_resolve_shared_fun(*info);

      info = SimpleCreateSharedFunctionInfo(
          isolate, Builtins::kPromiseRejectClosure, factory->empty_string(), 1);
      native_context()->set_promise_reject_shared_fun(*info);
    }

    {
      Handle<SharedFunctionInfo> info = SimpleCreateSharedFunctionInfo(
          isolate, Builtins::kPromiseAllResolveElementClosure,
          factory->empty_string(), 1);
      native_context()->set_promise_all_resolve_element_shared_fun(*info);
    }

    // Force the Promise constructor to fast properties, so that we can use the
    // fast paths for various things like
    //
    //   x instanceof Promise
    //
    // etc. We should probably come up with a more principled approach once
    // the JavaScript builtins are gone.
    JSObject::MigrateSlowToFast(promise_fun, 0, "Bootstrapping");
  }

  {  // -- R e g E x p
    // Builtin functions for RegExp.prototype.
    Handle<JSFunction> regexp_fun = InstallFunction(
        global, "RegExp", JS_REGEXP_TYPE,
        JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize,
        JSRegExp::kInObjectFieldCount, factory->the_hole_value(),
        Builtins::kRegExpConstructor);
    InstallWithIntrinsicDefaultProto(isolate, regexp_fun,
                                     Context::REGEXP_FUNCTION_INDEX);

    Handle<SharedFunctionInfo> shared(regexp_fun->shared(), isolate);
    shared->SetConstructStub(*BUILTIN_CODE(isolate, JSBuiltinsConstructStub));
    shared->set_instance_class_name(isolate->heap()->RegExp_string());
    shared->set_internal_formal_parameter_count(2);
    shared->set_length(2);

    {
      // Setup %RegExpPrototype%.
      Handle<JSObject> prototype(
          JSObject::cast(regexp_fun->instance_prototype()));

      {
        Handle<JSFunction> fun = SimpleInstallFunction(
            prototype, factory->exec_string(), Builtins::kRegExpPrototypeExec,
            1, true, DONT_ENUM);
        native_context()->set_regexp_exec_function(*fun);
      }

      SimpleInstallGetter(prototype, factory->dotAll_string(),
                          Builtins::kRegExpPrototypeDotAllGetter, true);
      SimpleInstallGetter(prototype, factory->flags_string(),
                          Builtins::kRegExpPrototypeFlagsGetter, true);
      SimpleInstallGetter(prototype, factory->global_string(),
                          Builtins::kRegExpPrototypeGlobalGetter, true);
      SimpleInstallGetter(prototype, factory->ignoreCase_string(),
                          Builtins::kRegExpPrototypeIgnoreCaseGetter, true);
      SimpleInstallGetter(prototype, factory->multiline_string(),
                          Builtins::kRegExpPrototypeMultilineGetter, true);
      SimpleInstallGetter(prototype, factory->source_string(),
                          Builtins::kRegExpPrototypeSourceGetter, true);
      SimpleInstallGetter(prototype, factory->sticky_string(),
                          Builtins::kRegExpPrototypeStickyGetter, true);
      SimpleInstallGetter(prototype, factory->unicode_string(),
                          Builtins::kRegExpPrototypeUnicodeGetter, true);

      SimpleInstallFunction(prototype, "compile",
                            Builtins::kRegExpPrototypeCompile, 2, true,
                            DONT_ENUM);
      SimpleInstallFunction(prototype, factory->toString_string(),
                            Builtins::kRegExpPrototypeToString, 0, false,
                            DONT_ENUM);
      SimpleInstallFunction(prototype, "test", Builtins::kRegExpPrototypeTest,
                            1, true, DONT_ENUM);

      SimpleInstallFunction(prototype, factory->match_symbol(),
                            "[Symbol.match]", Builtins::kRegExpPrototypeMatch,
                            1, true);

      SimpleInstallFunction(prototype, factory->replace_symbol(),
                            "[Symbol.replace]",
                            Builtins::kRegExpPrototypeReplace, 2, false);

      SimpleInstallFunction(prototype, factory->search_symbol(),
                            "[Symbol.search]", Builtins::kRegExpPrototypeSearch,
                            1, true);

      SimpleInstallFunction(prototype, factory->split_symbol(),
                            "[Symbol.split]", Builtins::kRegExpPrototypeSplit,
                            2, false);

      Handle<Map> prototype_map(prototype->map());
      Map::SetShouldBeFastPrototypeMap(prototype_map, true, isolate);

      // Store the initial RegExp.prototype map. This is used in fast-path
      // checks. Do not alter the prototype after this point.
      native_context()->set_regexp_prototype_map(*prototype_map);
    }

    {
      // RegExp getters and setters.

      InstallSpeciesGetter(regexp_fun);

      // Static properties set by a successful match.

      const PropertyAttributes no_enum = DONT_ENUM;
      SimpleInstallGetterSetter(regexp_fun, factory->input_string(),
                                Builtins::kRegExpInputGetter,
                                Builtins::kRegExpInputSetter, no_enum);
      SimpleInstallGetterSetter(
          regexp_fun, factory->InternalizeUtf8String("$_"),
          Builtins::kRegExpInputGetter, Builtins::kRegExpInputSetter, no_enum);

      SimpleInstallGetterSetter(
          regexp_fun, factory->InternalizeUtf8String("lastMatch"),
          Builtins::kRegExpLastMatchGetter, Builtins::kEmptyFunction, no_enum);
      SimpleInstallGetterSetter(
          regexp_fun, factory->InternalizeUtf8String("$&"),
          Builtins::kRegExpLastMatchGetter, Builtins::kEmptyFunction, no_enum);

      SimpleInstallGetterSetter(
          regexp_fun, factory->InternalizeUtf8String("lastParen"),
          Builtins::kRegExpLastParenGetter, Builtins::kEmptyFunction, no_enum);
      SimpleInstallGetterSetter(
          regexp_fun, factory->InternalizeUtf8String("$+"),
          Builtins::kRegExpLastParenGetter, Builtins::kEmptyFunction, no_enum);

      SimpleInstallGetterSetter(regexp_fun,
                                factory->InternalizeUtf8String("leftContext"),
                                Builtins::kRegExpLeftContextGetter,
                                Builtins::kEmptyFunction, no_enum);
      SimpleInstallGetterSetter(regexp_fun,
                                factory->InternalizeUtf8String("$`"),
                                Builtins::kRegExpLeftContextGetter,
                                Builtins::kEmptyFunction, no_enum);

      SimpleInstallGetterSetter(regexp_fun,
                                factory->InternalizeUtf8String("rightContext"),
                                Builtins::kRegExpRightContextGetter,
                                Builtins::kEmptyFunction, no_enum);
      SimpleInstallGetterSetter(regexp_fun,
                                factory->InternalizeUtf8String("$'"),
                                Builtins::kRegExpRightContextGetter,
                                Builtins::kEmptyFunction, no_enum);

#define INSTALL_CAPTURE_GETTER(i)                         \
  SimpleInstallGetterSetter(                              \
      regexp_fun, factory->InternalizeUtf8String("$" #i), \
      Builtins::kRegExpCapture##i##Getter, Builtins::kEmptyFunction, no_enum)
      INSTALL_CAPTURE_GETTER(1);
      INSTALL_CAPTURE_GETTER(2);
      INSTALL_CAPTURE_GETTER(3);
      INSTALL_CAPTURE_GETTER(4);
      INSTALL_CAPTURE_GETTER(5);
      INSTALL_CAPTURE_GETTER(