| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/bootstrapper.h" |
| |
| #include "src/accessors.h" |
| #include "src/api-natives.h" |
| #include "src/base/utils/random-number-generator.h" |
| #include "src/code-stubs.h" |
| #include "src/extensions/externalize-string-extension.h" |
| #include "src/extensions/free-buffer-extension.h" |
| #include "src/extensions/gc-extension.h" |
| #include "src/extensions/statistics-extension.h" |
| #include "src/extensions/trigger-failure-extension.h" |
| #include "src/snapshot/natives.h" |
| #include "src/snapshot/snapshot.h" |
| #include "third_party/fdlibm/fdlibm.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| Bootstrapper::Bootstrapper(Isolate* isolate) |
| : isolate_(isolate), |
| nesting_(0), |
| extensions_cache_(Script::TYPE_EXTENSION) {} |
| |
| |
| template <class Source> |
| inline FixedArray* GetCache(Heap* heap); |
| |
| |
| template <> |
| FixedArray* GetCache<Natives>(Heap* heap) { |
| return heap->natives_source_cache(); |
| } |
| |
| |
| template <> |
| FixedArray* GetCache<ExperimentalNatives>(Heap* heap) { |
| return heap->experimental_natives_source_cache(); |
| } |
| |
| |
| template <> |
| FixedArray* GetCache<ExtraNatives>(Heap* heap) { |
| return heap->extra_natives_source_cache(); |
| } |
| |
| |
| template <class Source> |
| Handle<String> Bootstrapper::SourceLookup(int index) { |
| DCHECK(0 <= index && index < Source::GetBuiltinsCount()); |
| Heap* heap = isolate_->heap(); |
| if (GetCache<Source>(heap)->get(index)->IsUndefined()) { |
| // We can use external strings for the natives. |
| Vector<const char> source = Source::GetScriptSource(index); |
| NativesExternalStringResource* resource = |
| new NativesExternalStringResource(source.start(), source.length()); |
| // We do not expect this to throw an exception. Change this if it does. |
| Handle<String> source_code = isolate_->factory() |
| ->NewExternalStringFromOneByte(resource) |
| .ToHandleChecked(); |
| // Mark this external string with a special map. |
| source_code->set_map(isolate_->heap()->native_source_string_map()); |
| GetCache<Source>(heap)->set(index, *source_code); |
| } |
| Handle<Object> cached_source(GetCache<Source>(heap)->get(index), isolate_); |
| return Handle<String>::cast(cached_source); |
| } |
| |
| |
| template Handle<String> Bootstrapper::SourceLookup<Natives>(int index); |
| template Handle<String> Bootstrapper::SourceLookup<ExperimentalNatives>( |
| int index); |
| template Handle<String> Bootstrapper::SourceLookup<ExtraNatives>(int index); |
| |
| |
| 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 != NULL && strlen(FLAG_expose_gc_as) != 0; |
| return flag_given ? FLAG_expose_gc_as : "gc"; |
| } |
| |
| |
| v8::Extension* Bootstrapper::free_buffer_extension_ = NULL; |
| v8::Extension* Bootstrapper::gc_extension_ = NULL; |
| v8::Extension* Bootstrapper::externalize_string_extension_ = NULL; |
| v8::Extension* Bootstrapper::statistics_extension_ = NULL; |
| v8::Extension* Bootstrapper::trigger_failure_extension_ = NULL; |
| |
| |
| 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_); |
| } |
| |
| |
| void Bootstrapper::TearDownExtensions() { |
| delete free_buffer_extension_; |
| free_buffer_extension_ = NULL; |
| delete gc_extension_; |
| gc_extension_ = NULL; |
| delete externalize_string_extension_; |
| externalize_string_extension_ = NULL; |
| delete statistics_extension_; |
| statistics_extension_ = NULL; |
| delete trigger_failure_extension_; |
| trigger_failure_extension_ = NULL; |
| } |
| |
| |
| void DeleteNativeSources(Object* maybe_array) { |
| if (maybe_array->IsFixedArray()) { |
| FixedArray* array = FixedArray::cast(maybe_array); |
| for (int i = 0; i < array->length(); i++) { |
| Object* natives_source = array->get(i); |
| if (!natives_source->IsUndefined()) { |
| const NativesExternalStringResource* resource = |
| reinterpret_cast<const NativesExternalStringResource*>( |
| ExternalOneByteString::cast(natives_source)->resource()); |
| delete resource; |
| } |
| } |
| } |
| } |
| |
| |
| void Bootstrapper::TearDown() { |
| DeleteNativeSources(isolate_->heap()->natives_source_cache()); |
| DeleteNativeSources(isolate_->heap()->experimental_natives_source_cache()); |
| DeleteNativeSources(isolate_->heap()->extra_natives_source_cache()); |
| extensions_cache_.Initialize(isolate_, false); // Yes, symmetrical |
| } |
| |
| |
| class Genesis BASE_EMBEDDED { |
| public: |
| Genesis(Isolate* isolate, |
| MaybeHandle<JSGlobalProxy> maybe_global_proxy, |
| v8::Handle<v8::ObjectTemplate> global_proxy_template, |
| v8::ExtensionConfiguration* extensions); |
| ~Genesis() { } |
| |
| Isolate* isolate() const { return isolate_; } |
| Factory* factory() const { return isolate_->factory(); } |
| Heap* heap() const { return isolate_->heap(); } |
| |
| Handle<Context> result() { return result_; } |
| |
| 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); |
| // Creates the ThrowTypeError function. ECMA 5th Ed. 13.2.3 |
| Handle<JSFunction> GetRestrictedFunctionPropertiesThrower(); |
| Handle<JSFunction> GetStrictArgumentsPoisonFunction(); |
| Handle<JSFunction> GetThrowTypeErrorIntrinsic(Builtins::Name builtin_name); |
| |
| void CreateStrictModeFunctionMaps(Handle<JSFunction> empty); |
| void CreateStrongModeFunctionMaps(Handle<JSFunction> empty); |
| |
| // Make the "arguments" and "caller" properties throw a TypeError on access. |
| void AddRestrictedFunctionProperties(Handle<Map> map); |
| |
| // 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 used the deserialized ones that are linked together with the |
| // rest of the context snapshot. |
| Handle<GlobalObject> CreateNewGlobals( |
| v8::Handle<v8::ObjectTemplate> global_proxy_template, |
| Handle<JSGlobalProxy> global_proxy); |
| // Hooks the given global proxy into the context. If the context was created |
| // by deserialization then this will unhook the global proxy that was |
| // deserialized, leaving the GC to pick it up. |
| void HookUpGlobalProxy(Handle<GlobalObject> global_object, |
| Handle<JSGlobalProxy> global_proxy); |
| // Similarly, we want to use the global that has been created by the templates |
| // passed through the API. The global from the snapshot is detached from the |
| // other objects in the snapshot. |
| void HookUpGlobalObject(Handle<GlobalObject> global_object, |
| Handle<FixedArray> outdated_contexts); |
| // New context initialization. Used for creating a context from scratch. |
| void InitializeGlobal(Handle<GlobalObject> global_object, |
| Handle<JSFunction> empty_function); |
| void InitializeExperimentalGlobal(); |
| // Installs the contents of the native .js files on the global objects. |
| // Used for creating a context from scratch. |
| void InstallNativeFunctions(); |
| void InstallExperimentalNativeFunctions(); |
| // Typed arrays are not serializable and have to initialized afterwards. |
| void InitializeBuiltinTypedArrays(); |
| |
| #define DECLARE_FEATURE_INITIALIZATION(id, descr) \ |
| void InstallNativeFunctions_##id(); \ |
| void InitializeGlobal_##id(); |
| |
| HARMONY_INPROGRESS(DECLARE_FEATURE_INITIALIZATION) |
| HARMONY_STAGED(DECLARE_FEATURE_INITIALIZATION) |
| HARMONY_SHIPPING(DECLARE_FEATURE_INITIALIZATION) |
| #undef DECLARE_FEATURE_INITIALIZATION |
| |
| Handle<JSFunction> InstallInternalArray(Handle<JSObject> target, |
| const char* name, |
| ElementsKind elements_kind); |
| bool InstallNatives(); |
| |
| void InstallTypedArray( |
| const char* name, |
| ElementsKind elements_kind, |
| Handle<JSFunction>* fun, |
| Handle<Map>* external_map); |
| bool InstallExperimentalNatives(); |
| bool InstallExtraNatives(); |
| void InstallBuiltinFunctionIds(); |
| void InstallJSFunctionResultCaches(); |
| void InitializeNormalizedMapCaches(); |
| |
| enum ExtensionTraversalState { |
| UNVISITED, VISITED, INSTALLED |
| }; |
| |
| class ExtensionStates { |
| public: |
| ExtensionStates(); |
| ExtensionTraversalState get_state(RegisteredExtension* extension); |
| void set_state(RegisteredExtension* extension, |
| ExtensionTraversalState state); |
| private: |
| 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 InstallJSBuiltins(Handle<JSBuiltinsObject> builtins); |
| bool ConfigureApiObject(Handle<JSObject> object, |
| Handle<ObjectTemplateInfo> object_template); |
| bool ConfigureGlobalObjects( |
| v8::Handle<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); |
| |
| enum FunctionMode { |
| // With prototype. |
| FUNCTION_WITH_WRITEABLE_PROTOTYPE, |
| FUNCTION_WITH_READONLY_PROTOTYPE, |
| // Without prototype. |
| FUNCTION_WITHOUT_PROTOTYPE, |
| BOUND_FUNCTION |
| }; |
| |
| static bool IsFunctionModeWithPrototype(FunctionMode function_mode) { |
| return (function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE || |
| function_mode == FUNCTION_WITH_READONLY_PROTOTYPE); |
| } |
| |
| Handle<Map> CreateSloppyFunctionMap(FunctionMode function_mode); |
| |
| void SetFunctionInstanceDescriptor(Handle<Map> map, |
| FunctionMode function_mode); |
| void MakeFunctionInstancePrototypeWritable(); |
| |
| Handle<Map> CreateStrictFunctionMap(FunctionMode function_mode, |
| Handle<JSFunction> empty_function); |
| Handle<Map> CreateStrongFunctionMap(Handle<JSFunction> empty_function, |
| bool is_constructor); |
| |
| |
| void SetStrictFunctionInstanceDescriptor(Handle<Map> map, |
| FunctionMode function_mode); |
| void SetStrongFunctionInstanceDescriptor(Handle<Map> map); |
| |
| static bool CompileBuiltin(Isolate* isolate, int index); |
| static bool CompileExperimentalBuiltin(Isolate* isolate, int index); |
| static bool CompileExtraBuiltin(Isolate* isolate, int index); |
| static bool CompileNative(Isolate* isolate, Vector<const char> name, |
| Handle<String> source, int argc, |
| Handle<Object> argv[]); |
| |
| 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_; |
| |
| // Function maps. Function maps are created initially with a read only |
| // prototype for the processing of JS builtins. Later the function maps are |
| // replaced in order to make prototype writable. These are the final, writable |
| // prototype, maps. |
| Handle<Map> sloppy_function_map_writable_prototype_; |
| Handle<Map> strict_function_map_writable_prototype_; |
| Handle<JSFunction> strict_poison_function_; |
| Handle<JSFunction> restricted_function_properties_thrower_; |
| |
| BootstrapperActive active_; |
| friend class Bootstrapper; |
| }; |
| |
| |
| void Bootstrapper::Iterate(ObjectVisitor* v) { |
| extensions_cache_.Iterate(v); |
| v->Synchronize(VisitorSynchronization::kExtensions); |
| } |
| |
| |
| Handle<Context> Bootstrapper::CreateEnvironment( |
| MaybeHandle<JSGlobalProxy> maybe_global_proxy, |
| v8::Handle<v8::ObjectTemplate> global_proxy_template, |
| v8::ExtensionConfiguration* extensions) { |
| HandleScope scope(isolate_); |
| Genesis genesis( |
| isolate_, maybe_global_proxy, global_proxy_template, extensions); |
| Handle<Context> env = genesis.result(); |
| if (env.is_null() || !InstallExtensions(env, extensions)) { |
| return Handle<Context>(); |
| } |
| return scope.CloseAndEscape(env); |
| } |
| |
| |
| static void SetObjectPrototype(Handle<JSObject> object, Handle<Object> proto) { |
| // object.__proto__ = proto; |
| Handle<Map> old_map = Handle<Map>(object->map()); |
| Handle<Map> new_map = Map::Copy(old_map, "SetObjectPrototype"); |
| Map::SetPrototype(new_map, proto, FAST_PROTOTYPE); |
| JSObject::MigrateToMap(object, new_map); |
| } |
| |
| |
| void Bootstrapper::DetachGlobal(Handle<Context> env) { |
| Factory* factory = env->GetIsolate()->factory(); |
| Handle<JSGlobalProxy> global_proxy(JSGlobalProxy::cast(env->global_proxy())); |
| global_proxy->set_native_context(*factory->null_value()); |
| SetObjectPrototype(global_proxy, factory->null_value()); |
| global_proxy->map()->SetConstructor(*factory->null_value()); |
| if (FLAG_track_detached_contexts) { |
| env->GetIsolate()->AddDetachedContext(env); |
| } |
| } |
| |
| |
| static Handle<JSFunction> InstallFunction(Handle<JSObject> target, |
| const char* name, InstanceType type, |
| int instance_size, |
| MaybeHandle<JSObject> maybe_prototype, |
| Builtins::Name call, |
| bool strict_function_map = false) { |
| Isolate* isolate = target->GetIsolate(); |
| Factory* factory = isolate->factory(); |
| Handle<String> internalized_name = factory->InternalizeUtf8String(name); |
| Handle<Code> call_code = Handle<Code>(isolate->builtins()->builtin(call)); |
| Handle<JSObject> prototype; |
| static const bool kReadOnlyPrototype = false; |
| static const bool kInstallConstructor = false; |
| Handle<JSFunction> function = |
| maybe_prototype.ToHandle(&prototype) |
| ? factory->NewFunction(internalized_name, call_code, prototype, type, |
| instance_size, kReadOnlyPrototype, |
| kInstallConstructor, strict_function_map) |
| : factory->NewFunctionWithoutPrototype(internalized_name, call_code, |
| strict_function_map); |
| PropertyAttributes attributes; |
| if (target->IsJSBuiltinsObject()) { |
| attributes = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| } else { |
| attributes = DONT_ENUM; |
| } |
| JSObject::AddProperty(target, internalized_name, function, attributes); |
| if (target->IsJSGlobalObject()) { |
| function->shared()->set_instance_class_name(*internalized_name); |
| } |
| function->shared()->set_native(true); |
| return function; |
| } |
| |
| |
| void Genesis::SetFunctionInstanceDescriptor(Handle<Map> map, |
| FunctionMode function_mode) { |
| int size = IsFunctionModeWithPrototype(function_mode) ? 5 : 4; |
| Map::EnsureDescriptorSlack(map, size); |
| |
| PropertyAttributes ro_attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| PropertyAttributes roc_attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY); |
| |
| Handle<AccessorInfo> length = |
| Accessors::FunctionLengthInfo(isolate(), roc_attribs); |
| { // Add length. |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(length->name())), |
| length, roc_attribs); |
| map->AppendDescriptor(&d); |
| } |
| Handle<AccessorInfo> name = |
| Accessors::FunctionNameInfo(isolate(), ro_attribs); |
| { // Add name. |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(name->name())), name, |
| roc_attribs); |
| map->AppendDescriptor(&d); |
| } |
| Handle<AccessorInfo> args = |
| Accessors::FunctionArgumentsInfo(isolate(), ro_attribs); |
| { // Add arguments. |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(args->name())), args, |
| ro_attribs); |
| map->AppendDescriptor(&d); |
| } |
| Handle<AccessorInfo> caller = |
| Accessors::FunctionCallerInfo(isolate(), ro_attribs); |
| { // Add caller. |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(caller->name())), |
| caller, ro_attribs); |
| map->AppendDescriptor(&d); |
| } |
| if (IsFunctionModeWithPrototype(function_mode)) { |
| if (function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE) { |
| ro_attribs = static_cast<PropertyAttributes>(ro_attribs & ~READ_ONLY); |
| } |
| Handle<AccessorInfo> prototype = |
| Accessors::FunctionPrototypeInfo(isolate(), ro_attribs); |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(prototype->name())), |
| prototype, ro_attribs); |
| map->AppendDescriptor(&d); |
| } |
| } |
| |
| |
| Handle<Map> Genesis::CreateSloppyFunctionMap(FunctionMode function_mode) { |
| Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize); |
| SetFunctionInstanceDescriptor(map, function_mode); |
| map->set_function_with_prototype(IsFunctionModeWithPrototype(function_mode)); |
| return map; |
| } |
| |
| |
| Handle<JSFunction> Genesis::CreateEmptyFunction(Isolate* isolate) { |
| // Allocate the map for function instances. Maps are allocated first and their |
| // prototypes patched later, once empty function is created. |
| |
| // Functions with this map will not have a 'prototype' property, and |
| // can not be used as constructors. |
| Handle<Map> function_without_prototype_map = |
| CreateSloppyFunctionMap(FUNCTION_WITHOUT_PROTOTYPE); |
| native_context()->set_sloppy_function_without_prototype_map( |
| *function_without_prototype_map); |
| |
| // Allocate the function map. This map is temporary, used only for processing |
| // of builtins. |
| // Later the map is replaced with writable prototype map, allocated below. |
| Handle<Map> function_map = |
| CreateSloppyFunctionMap(FUNCTION_WITH_READONLY_PROTOTYPE); |
| native_context()->set_sloppy_function_map(*function_map); |
| native_context()->set_sloppy_function_with_readonly_prototype_map( |
| *function_map); |
| |
| // The final map for functions. Writeable prototype. |
| // This map is installed in MakeFunctionInstancePrototypeWritable. |
| sloppy_function_map_writable_prototype_ = |
| CreateSloppyFunctionMap(FUNCTION_WITH_WRITEABLE_PROTOTYPE); |
| Factory* factory = isolate->factory(); |
| |
| Handle<String> object_name = factory->Object_string(); |
| |
| Handle<JSObject> object_function_prototype; |
| |
| { // --- O b j e c t --- |
| Handle<JSFunction> object_fun = factory->NewFunction(object_name); |
| int unused = JSObject::kInitialGlobalObjectUnusedPropertiesCount; |
| int instance_size = JSObject::kHeaderSize + kPointerSize * unused; |
| Handle<Map> object_function_map = |
| factory->NewMap(JS_OBJECT_TYPE, instance_size); |
| object_function_map->set_inobject_properties(unused); |
| JSFunction::SetInitialMap(object_fun, object_function_map, |
| isolate->factory()->null_value()); |
| object_function_map->set_unused_property_fields(unused); |
| |
| native_context()->set_object_function(*object_fun); |
| |
| // Allocate a new prototype for the object function. |
| object_function_prototype = |
| factory->NewJSObject(isolate->object_function(), TENURED); |
| Handle<Map> map = Map::Copy(handle(object_function_prototype->map()), |
| "EmptyObjectPrototype"); |
| map->set_is_prototype_map(true); |
| object_function_prototype->set_map(*map); |
| |
| native_context()->set_initial_object_prototype(*object_function_prototype); |
| // For bootstrapping set the array prototype to be the same as the object |
| // prototype, otherwise the missing initial_array_prototype will cause |
| // assertions during startup. |
| native_context()->set_initial_array_prototype(*object_function_prototype); |
| Accessors::FunctionSetPrototype(object_fun, object_function_prototype) |
| .Assert(); |
| |
| // Allocate initial strong object map. |
| Handle<Map> strong_object_map = |
| Map::Copy(Handle<Map>(object_fun->initial_map()), "EmptyStrongObject"); |
| strong_object_map->set_is_strong(); |
| native_context()->set_js_object_strong_map(*strong_object_map); |
| } |
| |
| // Allocate the empty function as the prototype for function - ES6 19.2.3 |
| Handle<Code> code(isolate->builtins()->builtin(Builtins::kEmptyFunction)); |
| Handle<JSFunction> empty_function = |
| factory->NewFunctionWithoutPrototype(factory->empty_string(), code); |
| |
| // Allocate the function map first and then patch the prototype later |
| Handle<Map> empty_function_map = |
| CreateSloppyFunctionMap(FUNCTION_WITHOUT_PROTOTYPE); |
| DCHECK(!empty_function_map->is_dictionary_map()); |
| Map::SetPrototype(empty_function_map, object_function_prototype); |
| empty_function_map->set_is_prototype_map(true); |
| |
| empty_function->set_map(*empty_function_map); |
| |
| // --- E m p t y --- |
| Handle<String> source = factory->NewStringFromStaticChars("() {}"); |
| Handle<Script> script = factory->NewScript(source); |
| script->set_type(Smi::FromInt(Script::TYPE_NATIVE)); |
| empty_function->shared()->set_script(*script); |
| empty_function->shared()->set_start_position(0); |
| empty_function->shared()->set_end_position(source->length()); |
| empty_function->shared()->DontAdaptArguments(); |
| |
| // Set prototypes for the function maps. |
| Handle<Map> sloppy_function_map(native_context()->sloppy_function_map(), |
| isolate); |
| Handle<Map> sloppy_function_without_prototype_map( |
| native_context()->sloppy_function_without_prototype_map(), isolate); |
| Map::SetPrototype(sloppy_function_map, empty_function); |
| Map::SetPrototype(sloppy_function_without_prototype_map, empty_function); |
| Map::SetPrototype(sloppy_function_map_writable_prototype_, empty_function); |
| |
| // ES6 draft 03-17-2015, section 8.2.2 step 12 |
| AddRestrictedFunctionProperties(empty_function_map); |
| |
| return empty_function; |
| } |
| |
| |
| void Genesis::SetStrictFunctionInstanceDescriptor(Handle<Map> map, |
| FunctionMode function_mode) { |
| int size = IsFunctionModeWithPrototype(function_mode) ? 5 : 4; |
| Map::EnsureDescriptorSlack(map, size); |
| |
| PropertyAttributes rw_attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE); |
| PropertyAttributes ro_attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| PropertyAttributes roc_attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY); |
| |
| // Add length. |
| if (function_mode == BOUND_FUNCTION) { |
| Handle<String> length_string = isolate()->factory()->length_string(); |
| DataDescriptor d(length_string, 0, ro_attribs, Representation::Tagged()); |
| map->AppendDescriptor(&d); |
| } else { |
| DCHECK(function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE || |
| function_mode == FUNCTION_WITH_READONLY_PROTOTYPE || |
| function_mode == FUNCTION_WITHOUT_PROTOTYPE); |
| Handle<AccessorInfo> length = |
| Accessors::FunctionLengthInfo(isolate(), roc_attribs); |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(length->name())), |
| length, roc_attribs); |
| map->AppendDescriptor(&d); |
| } |
| Handle<AccessorInfo> name = |
| Accessors::FunctionNameInfo(isolate(), roc_attribs); |
| { // Add name. |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(name->name())), name, |
| roc_attribs); |
| map->AppendDescriptor(&d); |
| } |
| if (IsFunctionModeWithPrototype(function_mode)) { |
| // Add prototype. |
| PropertyAttributes attribs = |
| function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE ? rw_attribs |
| : ro_attribs; |
| Handle<AccessorInfo> prototype = |
| Accessors::FunctionPrototypeInfo(isolate(), attribs); |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(prototype->name())), |
| prototype, attribs); |
| map->AppendDescriptor(&d); |
| } |
| } |
| |
| |
| void Genesis::SetStrongFunctionInstanceDescriptor(Handle<Map> map) { |
| Map::EnsureDescriptorSlack(map, 2); |
| |
| PropertyAttributes ro_attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| |
| Handle<AccessorInfo> length = |
| Accessors::FunctionLengthInfo(isolate(), ro_attribs); |
| { // Add length. |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(length->name())), |
| length, ro_attribs); |
| map->AppendDescriptor(&d); |
| } |
| Handle<AccessorInfo> name = |
| Accessors::FunctionNameInfo(isolate(), ro_attribs); |
| { // Add name. |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(name->name())), name, |
| ro_attribs); |
| map->AppendDescriptor(&d); |
| } |
| } |
| |
| |
| // Creates the %ThrowTypeError% function. |
| Handle<JSFunction> Genesis::GetThrowTypeErrorIntrinsic( |
| Builtins::Name builtin_name) { |
| Handle<String> name = |
| factory()->InternalizeOneByteString(STATIC_CHAR_VECTOR("ThrowTypeError")); |
| Handle<Code> code(isolate()->builtins()->builtin(builtin_name)); |
| Handle<JSFunction> function = |
| factory()->NewFunctionWithoutPrototype(name, code); |
| function->set_map(native_context()->sloppy_function_map()); |
| function->shared()->DontAdaptArguments(); |
| |
| // %ThrowTypeError% must not have a name property. |
| JSReceiver::DeleteProperty(function, factory()->name_string()).Assert(); |
| |
| // length needs to be non configurable. |
| Handle<Object> value(Smi::FromInt(function->shared()->length()), isolate()); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| function, factory()->length_string(), value, |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY)) |
| .Assert(); |
| |
| JSObject::PreventExtensions(function).Assert(); |
| |
| return function; |
| } |
| |
| |
| // ECMAScript 5th Edition, 13.2.3 |
| Handle<JSFunction> Genesis::GetRestrictedFunctionPropertiesThrower() { |
| if (restricted_function_properties_thrower_.is_null()) { |
| restricted_function_properties_thrower_ = GetThrowTypeErrorIntrinsic( |
| Builtins::kRestrictedFunctionPropertiesThrower); |
| } |
| return restricted_function_properties_thrower_; |
| } |
| |
| |
| Handle<JSFunction> Genesis::GetStrictArgumentsPoisonFunction() { |
| if (strict_poison_function_.is_null()) { |
| strict_poison_function_ = GetThrowTypeErrorIntrinsic( |
| Builtins::kRestrictedStrictArgumentsPropertiesThrower); |
| } |
| return strict_poison_function_; |
| } |
| |
| |
| Handle<Map> Genesis::CreateStrictFunctionMap( |
| FunctionMode function_mode, Handle<JSFunction> empty_function) { |
| Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize); |
| SetStrictFunctionInstanceDescriptor(map, function_mode); |
| map->set_function_with_prototype(IsFunctionModeWithPrototype(function_mode)); |
| Map::SetPrototype(map, empty_function); |
| return map; |
| } |
| |
| |
| Handle<Map> Genesis::CreateStrongFunctionMap( |
| Handle<JSFunction> empty_function, bool is_constructor) { |
| Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize); |
| SetStrongFunctionInstanceDescriptor(map); |
| map->set_function_with_prototype(is_constructor); |
| Map::SetPrototype(map, empty_function); |
| map->set_is_extensible(is_constructor); |
| map->set_is_strong(); |
| return map; |
| } |
| |
| |
| void Genesis::CreateStrictModeFunctionMaps(Handle<JSFunction> empty) { |
| // Allocate map for the prototype-less strict mode instances. |
| Handle<Map> strict_function_without_prototype_map = |
| CreateStrictFunctionMap(FUNCTION_WITHOUT_PROTOTYPE, empty); |
| native_context()->set_strict_function_without_prototype_map( |
| *strict_function_without_prototype_map); |
| |
| // Allocate map for the strict mode functions. This map is temporary, used |
| // only for processing of builtins. |
| // Later the map is replaced with writable prototype map, allocated below. |
| Handle<Map> strict_function_map = |
| CreateStrictFunctionMap(FUNCTION_WITH_READONLY_PROTOTYPE, empty); |
| native_context()->set_strict_function_map(*strict_function_map); |
| |
| // The final map for the strict mode functions. Writeable prototype. |
| // This map is installed in MakeFunctionInstancePrototypeWritable. |
| strict_function_map_writable_prototype_ = |
| CreateStrictFunctionMap(FUNCTION_WITH_WRITEABLE_PROTOTYPE, empty); |
| |
| // Special map for bound functions. |
| Handle<Map> bound_function_map = |
| CreateStrictFunctionMap(BOUND_FUNCTION, empty); |
| native_context()->set_bound_function_map(*bound_function_map); |
| } |
| |
| |
| void Genesis::CreateStrongModeFunctionMaps(Handle<JSFunction> empty) { |
| // Allocate map for strong mode instances, which never have prototypes. |
| Handle<Map> strong_function_map = CreateStrongFunctionMap(empty, false); |
| native_context()->set_strong_function_map(*strong_function_map); |
| // Constructors do, though. |
| Handle<Map> strong_constructor_map = CreateStrongFunctionMap(empty, true); |
| native_context()->set_strong_constructor_map(*strong_constructor_map); |
| } |
| |
| |
| static void ReplaceAccessors(Handle<Map> map, |
| Handle<String> name, |
| PropertyAttributes attributes, |
| Handle<AccessorPair> accessor_pair) { |
| DescriptorArray* descriptors = map->instance_descriptors(); |
| int idx = descriptors->SearchWithCache(*name, *map); |
| AccessorConstantDescriptor descriptor(name, accessor_pair, attributes); |
| descriptors->Replace(idx, &descriptor); |
| } |
| |
| |
| void Genesis::AddRestrictedFunctionProperties(Handle<Map> map) { |
| PropertyAttributes rw_attribs = static_cast<PropertyAttributes>(DONT_ENUM); |
| Handle<JSFunction> thrower = GetRestrictedFunctionPropertiesThrower(); |
| Handle<AccessorPair> accessors = factory()->NewAccessorPair(); |
| accessors->set_getter(*thrower); |
| accessors->set_setter(*thrower); |
| |
| ReplaceAccessors(map, factory()->arguments_string(), rw_attribs, accessors); |
| ReplaceAccessors(map, factory()->caller_string(), rw_attribs, accessors); |
| } |
| |
| |
| static void AddToWeakNativeContextList(Context* context) { |
| DCHECK(context->IsNativeContext()); |
| Heap* heap = context->GetIsolate()->heap(); |
| #ifdef DEBUG |
| { // NOLINT |
| DCHECK(context->get(Context::NEXT_CONTEXT_LINK)->IsUndefined()); |
| // Check that context is not in the list yet. |
| for (Object* current = heap->native_contexts_list(); |
| !current->IsUndefined(); |
| current = Context::cast(current)->get(Context::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. |
| { |
| v8::NeanderArray listeners(isolate()); |
| native_context()->set_message_listeners(*listeners.value()); |
| } |
| } |
| |
| |
| Handle<GlobalObject> Genesis::CreateNewGlobals( |
| v8::Handle<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()) { |
| js_global_object_template = |
| Handle<ObjectTemplateInfo>::cast(proto_template); |
| } |
| } |
| |
| if (js_global_object_template.is_null()) { |
| Handle<String> name = Handle<String>(heap()->empty_string()); |
| Handle<Code> code = Handle<Code>(isolate()->builtins()->builtin( |
| Builtins::kIllegal)); |
| Handle<JSObject> prototype = |
| factory()->NewFunctionPrototype(isolate()->object_function()); |
| js_global_object_function = factory()->NewFunction( |
| name, code, prototype, JS_GLOBAL_OBJECT_TYPE, JSGlobalObject::kSize); |
| #ifdef DEBUG |
| LookupIterator it(prototype, factory()->constructor_string(), |
| LookupIterator::OWN_SKIP_INTERCEPTOR); |
| Handle<Object> value = JSReceiver::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_hidden_prototype(); |
| js_global_object_function->initial_map()->set_dictionary_map(true); |
| Handle<GlobalObject> global_object = |
| factory()->NewGlobalObject(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 = Handle<String>(heap()->empty_string()); |
| Handle<Code> code = Handle<Code>(isolate()->builtins()->builtin( |
| Builtins::kIllegal)); |
| global_proxy_function = factory()->NewFunction( |
| name, code, JS_GLOBAL_PROXY_TYPE, JSGlobalProxy::kSize); |
| } 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); |
| |
| // Set global_proxy.__proto__ to js_global after ConfigureGlobalObjects |
| // Return the global proxy. |
| |
| factory()->ReinitializeJSGlobalProxy(global_proxy, global_proxy_function); |
| return global_object; |
| } |
| |
| |
| void Genesis::HookUpGlobalProxy(Handle<GlobalObject> global_object, |
| Handle<JSGlobalProxy> global_proxy) { |
| // Set the native context for the global object. |
| global_object->set_native_context(*native_context()); |
| global_object->set_global_proxy(*global_proxy); |
| global_proxy->set_native_context(*native_context()); |
| // If we deserialized the context, the global proxy is already |
| // correctly set up. Otherwise it's undefined. |
| DCHECK(native_context()->get(Context::GLOBAL_PROXY_INDEX)->IsUndefined() || |
| native_context()->global_proxy() == *global_proxy); |
| native_context()->set_global_proxy(*global_proxy); |
| } |
| |
| |
| void Genesis::HookUpGlobalObject(Handle<GlobalObject> global_object, |
| Handle<FixedArray> outdated_contexts) { |
| Handle<GlobalObject> global_object_from_snapshot( |
| GlobalObject::cast(native_context()->extension())); |
| Handle<JSBuiltinsObject> builtins_global(native_context()->builtins()); |
| native_context()->set_extension(*global_object); |
| native_context()->set_security_token(*global_object); |
| |
| // Replace outdated global objects in deserialized contexts. |
| for (int i = 0; i < outdated_contexts->length(); ++i) { |
| Context* context = Context::cast(outdated_contexts->get(i)); |
| // Assert that there is only one native context. |
| DCHECK(!context->IsNativeContext() || context == *native_context()); |
| DCHECK_EQ(context->global_object(), *global_object_from_snapshot); |
| context->set_global_object(*global_object); |
| } |
| |
| static const PropertyAttributes attributes = |
| static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE); |
| Runtime::DefineObjectProperty(builtins_global, factory()->global_string(), |
| global_object, attributes).Assert(); |
| // Set up the reference from the global object to the builtins object. |
| JSGlobalObject::cast(*global_object)->set_builtins(*builtins_global); |
| TransferNamedProperties(global_object_from_snapshot, global_object); |
| TransferIndexedProperties(global_object_from_snapshot, global_object); |
| } |
| |
| |
| // 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<GlobalObject> global_object, |
| Handle<JSFunction> empty_function) { |
| // --- 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(NULL); |
| // Set extension and global object. |
| native_context()->set_extension(*global_object); |
| native_context()->set_global_object(*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(); |
| Heap* heap = isolate->heap(); |
| |
| Handle<ScriptContextTable> script_context_table = |
| factory->NewScriptContextTable(); |
| native_context()->set_script_context_table(*script_context_table); |
| |
| Handle<String> object_name = factory->Object_string(); |
| JSObject::AddProperty( |
| global_object, object_name, isolate->object_function(), DONT_ENUM); |
| |
| Handle<JSObject> global(native_context()->global_object()); |
| |
| // Install global Function object |
| InstallFunction(global, "Function", JS_FUNCTION_TYPE, JSFunction::kSize, |
| empty_function, Builtins::kIllegal); |
| |
| { // --- A r r a y --- |
| Handle<JSFunction> array_function = |
| InstallFunction(global, "Array", JS_ARRAY_TYPE, JSArray::kSize, |
| isolate->initial_object_prototype(), |
| Builtins::kArrayCode); |
| array_function->shared()->DontAdaptArguments(); |
| array_function->shared()->set_function_data(Smi::FromInt(kArrayCode)); |
| |
| // 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); |
| |
| Handle<AccessorInfo> array_length = |
| Accessors::ArrayLengthInfo(isolate, attribs); |
| { // Add length. |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(array_length->name())), array_length, |
| attribs); |
| initial_map->AppendDescriptor(&d); |
| } |
| |
| // array_function is used internally. JS code creating array object should |
| // search for the 'Array' property on the global object and use that one |
| // as the constructor. 'Array' property on a global object can be |
| // overwritten by JS code. |
| native_context()->set_array_function(*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()->set_construct_stub(*code); |
| |
| Handle<Map> initial_strong_map = |
| Map::Copy(initial_map, "SetInstancePrototype"); |
| initial_strong_map->set_is_strong(); |
| CacheInitialJSArrayMaps(native_context(), initial_strong_map); |
| } |
| |
| { // --- N u m b e r --- |
| Handle<JSFunction> number_fun = |
| InstallFunction(global, "Number", JS_VALUE_TYPE, JSValue::kSize, |
| isolate->initial_object_prototype(), |
| Builtins::kIllegal); |
| native_context()->set_number_function(*number_fun); |
| } |
| |
| { // --- B o o l e a n --- |
| Handle<JSFunction> boolean_fun = |
| InstallFunction(global, "Boolean", JS_VALUE_TYPE, JSValue::kSize, |
| isolate->initial_object_prototype(), |
| Builtins::kIllegal); |
| native_context()->set_boolean_function(*boolean_fun); |
| } |
| |
| { // --- S t r i n g --- |
| Handle<JSFunction> string_fun = |
| InstallFunction(global, "String", JS_VALUE_TYPE, JSValue::kSize, |
| isolate->initial_object_prototype(), |
| Builtins::kIllegal); |
| string_fun->shared()->set_construct_stub( |
| isolate->builtins()->builtin(Builtins::kStringConstructCode)); |
| native_context()->set_string_function(*string_fun); |
| |
| Handle<Map> string_map = |
| Handle<Map>(native_context()->string_function()->initial_map()); |
| Map::EnsureDescriptorSlack(string_map, 1); |
| |
| PropertyAttributes attribs = static_cast<PropertyAttributes>( |
| DONT_ENUM | DONT_DELETE | READ_ONLY); |
| Handle<AccessorInfo> string_length( |
| Accessors::StringLengthInfo(isolate, attribs)); |
| |
| { // Add length. |
| AccessorConstantDescriptor d(factory->length_string(), string_length, |
| attribs); |
| string_map->AppendDescriptor(&d); |
| } |
| } |
| |
| { |
| // --- S y m b o l --- |
| Handle<JSFunction> symbol_fun = InstallFunction( |
| global, "Symbol", JS_VALUE_TYPE, JSValue::kSize, |
| isolate->initial_object_prototype(), Builtins::kIllegal); |
| native_context()->set_symbol_function(*symbol_fun); |
| } |
| |
| { // --- D a t e --- |
| // Builtin functions for Date.prototype. |
| Handle<JSFunction> date_fun = |
| InstallFunction(global, "Date", JS_DATE_TYPE, JSDate::kSize, |
| isolate->initial_object_prototype(), |
| Builtins::kIllegal); |
| |
| native_context()->set_date_function(*date_fun); |
| } |
| |
| |
| { // -- R e g E x p |
| // Builtin functions for RegExp.prototype. |
| Handle<JSFunction> regexp_fun = |
| InstallFunction(global, "RegExp", JS_REGEXP_TYPE, JSRegExp::kSize, |
| isolate->initial_object_prototype(), |
| Builtins::kIllegal); |
| native_context()->set_regexp_function(*regexp_fun); |
| |
| DCHECK(regexp_fun->has_initial_map()); |
| Handle<Map> initial_map(regexp_fun->initial_map()); |
| |
| DCHECK_EQ(0, initial_map->inobject_properties()); |
| |
| PropertyAttributes final = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| Map::EnsureDescriptorSlack(initial_map, 5); |
| |
| { |
| // ECMA-262, section 15.10.7.1. |
| DataDescriptor field(factory->source_string(), |
| JSRegExp::kSourceFieldIndex, final, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&field); |
| } |
| { |
| // ECMA-262, section 15.10.7.2. |
| DataDescriptor field(factory->global_string(), |
| JSRegExp::kGlobalFieldIndex, final, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&field); |
| } |
| { |
| // ECMA-262, section 15.10.7.3. |
| DataDescriptor field(factory->ignore_case_string(), |
| JSRegExp::kIgnoreCaseFieldIndex, final, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&field); |
| } |
| { |
| // ECMA-262, section 15.10.7.4. |
| DataDescriptor field(factory->multiline_string(), |
| JSRegExp::kMultilineFieldIndex, final, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&field); |
| } |
| { |
| // ECMA-262, section 15.10.7.5. |
| PropertyAttributes writable = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE); |
| DataDescriptor field(factory->last_index_string(), |
| JSRegExp::kLastIndexFieldIndex, writable, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&field); |
| } |
| |
| static const int num_fields = JSRegExp::kInObjectFieldCount; |
| initial_map->set_inobject_properties(num_fields); |
| initial_map->set_pre_allocated_property_fields(num_fields); |
| initial_map->set_unused_property_fields(0); |
| initial_map->set_instance_size(initial_map->instance_size() + |
| num_fields * kPointerSize); |
| |
| // RegExp prototype object is itself a RegExp. |
| Handle<Map> proto_map = Map::Copy(initial_map, "RegExpPrototype"); |
| DCHECK(proto_map->prototype() == *isolate->initial_object_prototype()); |
| Handle<JSObject> proto = factory->NewJSObjectFromMap(proto_map); |
| proto->InObjectPropertyAtPut(JSRegExp::kSourceFieldIndex, |
| heap->query_colon_string()); |
| proto->InObjectPropertyAtPut(JSRegExp::kGlobalFieldIndex, |
| heap->false_value()); |
| proto->InObjectPropertyAtPut(JSRegExp::kIgnoreCaseFieldIndex, |
| heap->false_value()); |
| proto->InObjectPropertyAtPut(JSRegExp::kMultilineFieldIndex, |
| heap->false_value()); |
| proto->InObjectPropertyAtPut(JSRegExp::kLastIndexFieldIndex, |
| Smi::FromInt(0), |
| SKIP_WRITE_BARRIER); // It's a Smi. |
| proto_map->set_is_prototype_map(true); |
| Map::SetPrototype(initial_map, proto); |
| factory->SetRegExpIrregexpData(Handle<JSRegExp>::cast(proto), |
| JSRegExp::IRREGEXP, factory->empty_string(), |
| JSRegExp::Flags(0), 0); |
| } |
| |
| { // -- J S O N |
| Handle<String> name = factory->InternalizeUtf8String("JSON"); |
| Handle<JSFunction> cons = factory->NewFunction(name); |
| JSFunction::SetInstancePrototype(cons, |
| Handle<Object>(native_context()->initial_object_prototype(), isolate)); |
| cons->SetInstanceClassName(*name); |
| Handle<JSObject> json_object = factory->NewJSObject(cons, TENURED); |
| DCHECK(json_object->IsJSObject()); |
| JSObject::AddProperty(global, name, json_object, DONT_ENUM); |
| native_context()->set_json_object(*json_object); |
| } |
| |
| { // -- A r r a y B u f f e r |
| Handle<JSFunction> array_buffer_fun = |
| InstallFunction( |
| global, "ArrayBuffer", JS_ARRAY_BUFFER_TYPE, |
| JSArrayBuffer::kSizeWithInternalFields, |
| isolate->initial_object_prototype(), |
| Builtins::kIllegal); |
| native_context()->set_array_buffer_fun(*array_buffer_fun); |
| } |
| |
| { // -- T y p e d A r r a y s |
| #define INSTALL_TYPED_ARRAY(Type, type, TYPE, ctype, size) \ |
| { \ |
| Handle<JSFunction> fun; \ |
| Handle<Map> external_map; \ |
| InstallTypedArray(#Type "Array", \ |
| TYPE##_ELEMENTS, \ |
| &fun, \ |
| &external_map); \ |
| native_context()->set_##type##_array_fun(*fun); \ |
| native_context()->set_##type##_array_external_map(*external_map); \ |
| } |
| TYPED_ARRAYS(INSTALL_TYPED_ARRAY) |
| #undef INSTALL_TYPED_ARRAY |
| |
| Handle<JSFunction> data_view_fun = |
| InstallFunction( |
| global, "DataView", JS_DATA_VIEW_TYPE, |
| JSDataView::kSizeWithInternalFields, |
| isolate->initial_object_prototype(), |
| Builtins::kIllegal); |
| native_context()->set_data_view_fun(*data_view_fun); |
| } |
| |
| { // -- M a p |
| Handle<JSFunction> js_map_fun = InstallFunction( |
| global, "Map", JS_MAP_TYPE, JSMap::kSize, |
| isolate->initial_object_prototype(), Builtins::kIllegal); |
| native_context()->set_js_map_map(js_map_fun->initial_map()); |
| } |
| |
| { // -- S e t |
| Handle<JSFunction> js_set_fun = InstallFunction( |
| global, "Set", JS_SET_TYPE, JSSet::kSize, |
| isolate->initial_object_prototype(), Builtins::kIllegal); |
| native_context()->set_js_set_map(js_set_fun->initial_map()); |
| } |
| |
| { // Set up the iterator result object |
| STATIC_ASSERT(JSGeneratorObject::kResultPropertyCount == 2); |
| Handle<JSFunction> object_function(native_context()->object_function()); |
| Handle<Map> iterator_result_map = |
| Map::Create(isolate, JSGeneratorObject::kResultPropertyCount); |
| DCHECK_EQ(JSGeneratorObject::kResultSize, |
| iterator_result_map->instance_size()); |
| DCHECK_EQ(JSGeneratorObject::kResultPropertyCount, |
| iterator_result_map->inobject_properties()); |
| Map::EnsureDescriptorSlack(iterator_result_map, |
| JSGeneratorObject::kResultPropertyCount); |
| |
| DataDescriptor value_descr(factory->value_string(), |
| JSGeneratorObject::kResultValuePropertyIndex, |
| NONE, Representation::Tagged()); |
| iterator_result_map->AppendDescriptor(&value_descr); |
| |
| DataDescriptor done_descr(factory->done_string(), |
| JSGeneratorObject::kResultDonePropertyIndex, NONE, |
| Representation::Tagged()); |
| iterator_result_map->AppendDescriptor(&done_descr); |
| |
| iterator_result_map->set_unused_property_fields(0); |
| iterator_result_map->set_pre_allocated_property_fields( |
| JSGeneratorObject::kResultPropertyCount); |
| DCHECK_EQ(JSGeneratorObject::kResultSize, |
| iterator_result_map->instance_size()); |
| native_context()->set_iterator_result_map(*iterator_result_map); |
| } |
| |
| // -- W e a k M a p |
| InstallFunction(global, "WeakMap", JS_WEAK_MAP_TYPE, JSWeakMap::kSize, |
| isolate->initial_object_prototype(), Builtins::kIllegal); |
| // -- W e a k S e t |
| InstallFunction(global, "WeakSet", JS_WEAK_SET_TYPE, JSWeakSet::kSize, |
| isolate->initial_object_prototype(), Builtins::kIllegal); |
| |
| { // --- sloppy arguments map |
| // Make sure we can recognize argument objects at runtime. |
| // This is done by introducing an anonymous function with |
| // class_name equals 'Arguments'. |
| Handle<String> arguments_string = factory->Arguments_string(); |
| Handle<Code> code(isolate->builtins()->builtin(Builtins::kIllegal)); |
| Handle<JSFunction> function = factory->NewFunctionWithoutPrototype( |
| arguments_string, code); |
| function->shared()->set_instance_class_name(*arguments_string); |
| |
| Handle<Map> map = |
| factory->NewMap(JS_OBJECT_TYPE, Heap::kSloppyArgumentsObjectSize); |
| // Create the descriptor array for the arguments object. |
| Map::EnsureDescriptorSlack(map, 2); |
| |
| { // length |
| DataDescriptor d(factory->length_string(), Heap::kArgumentsLengthIndex, |
| DONT_ENUM, Representation::Tagged()); |
| map->AppendDescriptor(&d); |
| } |
| { // callee |
| DataDescriptor d(factory->callee_string(), Heap::kArgumentsCalleeIndex, |
| DONT_ENUM, Representation::Tagged()); |
| map->AppendDescriptor(&d); |
| } |
| // @@iterator method is added later. |
| |
| map->set_function_with_prototype(true); |
| map->set_pre_allocated_property_fields(2); |
| map->set_inobject_properties(2); |
| native_context()->set_sloppy_arguments_map(*map); |
| |
| DCHECK(!function->has_initial_map()); |
| JSFunction::SetInitialMap(function, map, |
| isolate->initial_object_prototype()); |
| |
| DCHECK(map->inobject_properties() > Heap::kArgumentsCalleeIndex); |
| DCHECK(map->inobject_properties() > Heap::kArgumentsLengthIndex); |
| DCHECK(!map->is_dictionary_map()); |
| DCHECK(IsFastObjectElementsKind(map->elements_kind())); |
| } |
| |
| { // --- aliased arguments map |
| Handle<Map> map = |
| Map::Copy(isolate->sloppy_arguments_map(), "AliasedArguments"); |
| map->set_elements_kind(SLOPPY_ARGUMENTS_ELEMENTS); |
| DCHECK_EQ(2, map->pre_allocated_property_fields()); |
| native_context()->set_aliased_arguments_map(*map); |
| } |
| |
| { // --- strict mode arguments map |
| const PropertyAttributes attributes = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| |
| // Create the ThrowTypeError functions. |
| Handle<AccessorPair> callee = factory->NewAccessorPair(); |
| Handle<AccessorPair> caller = factory->NewAccessorPair(); |
| |
| Handle<JSFunction> poison = GetStrictArgumentsPoisonFunction(); |
| |
| // Install the ThrowTypeError functions. |
| callee->set_getter(*poison); |
| callee->set_setter(*poison); |
| caller->set_getter(*poison); |
| caller->set_setter(*poison); |
| |
| // Create the map. Allocate one in-object field for length. |
| Handle<Map> map = factory->NewMap(JS_OBJECT_TYPE, |
| Heap::kStrictArgumentsObjectSize); |
| // Create the descriptor array for the arguments object. |
| Map::EnsureDescriptorSlack(map, 3); |
| |
| { // length |
| DataDescriptor d(factory->length_string(), Heap::kArgumentsLengthIndex, |
| DONT_ENUM, Representation::Tagged()); |
| map->AppendDescriptor(&d); |
| } |
| { // callee |
| AccessorConstantDescriptor d(factory->callee_string(), callee, |
| attributes); |
| map->AppendDescriptor(&d); |
| } |
| { // caller |
| AccessorConstantDescriptor d(factory->caller_string(), caller, |
| attributes); |
| map->AppendDescriptor(&d); |
| } |
| // @@iterator method is added later. |
| |
| map->set_function_with_prototype(true); |
| DCHECK_EQ(native_context()->object_function()->prototype(), |
| *isolate->initial_object_prototype()); |
| Map::SetPrototype(map, isolate->initial_object_prototype()); |
| map->set_pre_allocated_property_fields(1); |
| map->set_inobject_properties(1); |
| |
| // Copy constructor from the sloppy arguments boilerplate. |
| map->SetConstructor( |
| native_context()->sloppy_arguments_map()->GetConstructor()); |
| |
| native_context()->set_strict_arguments_map(*map); |
| |
| DCHECK(map->inobject_properties() > Heap::kArgumentsLengthIndex); |
| DCHECK(!map->is_dictionary_map()); |
| DCHECK(IsFastObjectElementsKind(map->elements_kind())); |
| } |
| |
| { // --- context extension |
| // Create a function for the context extension objects. |
| Handle<Code> code = Handle<Code>( |
| isolate->builtins()->builtin(Builtins::kIllegal)); |
| Handle<JSFunction> context_extension_fun = factory->NewFunction( |
| factory->empty_string(), code, JS_CONTEXT_EXTENSION_OBJECT_TYPE, |
| JSObject::kHeaderSize); |
| |
| Handle<String> name = factory->InternalizeOneByteString( |
| STATIC_CHAR_VECTOR("context_extension")); |
| context_extension_fun->shared()->set_instance_class_name(*name); |
| native_context()->set_context_extension_function(*context_extension_fun); |
| } |
| |
| |
| { |
| // Set up the call-as-function delegate. |
| Handle<Code> code = |
| Handle<Code>(isolate->builtins()->builtin( |
| Builtins::kHandleApiCallAsFunction)); |
| Handle<JSFunction> delegate = factory->NewFunction( |
| factory->empty_string(), code, JS_OBJECT_TYPE, JSObject::kHeaderSize); |
| native_context()->set_call_as_function_delegate(*delegate); |
| delegate->shared()->DontAdaptArguments(); |
| } |
| |
| { |
| // Set up the call-as-constructor delegate. |
| Handle<Code> code = |
| Handle<Code>(isolate->builtins()->builtin( |
| Builtins::kHandleApiCallAsConstructor)); |
| Handle<JSFunction> delegate = factory->NewFunction( |
| factory->empty_string(), code, JS_OBJECT_TYPE, JSObject::kHeaderSize); |
| native_context()->set_call_as_constructor_delegate(*delegate); |
| delegate->shared()->DontAdaptArguments(); |
| } |
| |
| // Initialize the embedder data slot. |
| Handle<FixedArray> embedder_data = factory->NewFixedArray(3); |
| native_context()->set_embedder_data(*embedder_data); |
| } |
| |
| |
| void Genesis::InstallTypedArray( |
| const char* name, |
| ElementsKind elements_kind, |
| Handle<JSFunction>* fun, |
| Handle<Map>* external_map) { |
| Handle<JSObject> global = Handle<JSObject>(native_context()->global_object()); |
| Handle<JSFunction> result = InstallFunction( |
| global, name, JS_TYPED_ARRAY_TYPE, JSTypedArray::kSize, |
| isolate()->initial_object_prototype(), Builtins::kIllegal); |
| |
| Handle<Map> initial_map = isolate()->factory()->NewMap( |
| JS_TYPED_ARRAY_TYPE, |
| JSTypedArray::kSizeWithInternalFields, |
| elements_kind); |
| JSFunction::SetInitialMap(result, initial_map, |
| handle(initial_map->prototype(), isolate())); |
| *fun = result; |
| |
| ElementsKind external_kind = GetNextTransitionElementsKind(elements_kind); |
| *external_map = Map::AsElementsKind(initial_map, external_kind); |
| } |
| |
| |
| void Genesis::InitializeExperimentalGlobal() { |
| #define FEATURE_INITIALIZE_GLOBAL(id, descr) InitializeGlobal_##id(); |
| |
| HARMONY_INPROGRESS(FEATURE_INITIALIZE_GLOBAL) |
| HARMONY_STAGED(FEATURE_INITIALIZE_GLOBAL) |
| HARMONY_SHIPPING(FEATURE_INITIALIZE_GLOBAL) |
| #undef FEATURE_INITIALIZE_GLOBAL |
| } |
| |
| |
| bool Genesis::CompileBuiltin(Isolate* isolate, int index) { |
| Vector<const char> name = Natives::GetScriptName(index); |
| Handle<String> source_code = |
| isolate->bootstrapper()->SourceLookup<Natives>(index); |
| Handle<Object> global = isolate->global_object(); |
| Handle<Object> utils = isolate->natives_utils_object(); |
| Handle<Object> args[] = {global, utils}; |
| return CompileNative(isolate, name, source_code, arraysize(args), args); |
| } |
| |
| |
| bool Genesis::CompileExperimentalBuiltin(Isolate* isolate, int index) { |
| HandleScope scope(isolate); |
| Vector<const char> name = ExperimentalNatives::GetScriptName(index); |
| Handle<String> source_code = |
| isolate->bootstrapper()->SourceLookup<ExperimentalNatives>(index); |
| Handle<Object> global = isolate->global_object(); |
| Handle<Object> utils = isolate->natives_utils_object(); |
| Handle<Object> args[] = {global, utils}; |
| return CompileNative(isolate, name, source_code, arraysize(args), args); |
| } |
| |
| |
| bool Genesis::CompileExtraBuiltin(Isolate* isolate, int index) { |
| HandleScope scope(isolate); |
| Vector<const char> name = ExtraNatives::GetScriptName(index); |
| Handle<String> source_code = |
| isolate->bootstrapper()->SourceLookup<ExtraNatives>(index); |
| Handle<Object> global = isolate->global_object(); |
| Handle<Object> exports = isolate->extras_exports_object(); |
| Handle<Object> args[] = {global, exports}; |
| return CompileNative(isolate, name, source_code, arraysize(args), args); |
| } |
| |
| |
| bool Genesis::CompileNative(Isolate* isolate, Vector<const char> name, |
| Handle<String> source, int argc, |
| Handle<Object> argv[]) { |
| SuppressDebug compiling_natives(isolate->debug()); |
| // During genesis, the boilerplate for stack overflow won't work until the |
| // environment has been at least partially initialized. Add a stack check |
| // before entering JS code to catch overflow early. |
| StackLimitCheck check(isolate); |
| if (check.HasOverflowed()) { |
| isolate->StackOverflow(); |
| return false; |
| } |
| |
| Handle<Context> context(isolate->context()); |
| |
| Handle<String> script_name = |
| isolate->factory()->NewStringFromUtf8(name).ToHandleChecked(); |
| Handle<SharedFunctionInfo> function_info = Compiler::CompileScript( |
| source, script_name, 0, 0, ScriptOriginOptions(), Handle<Object>(), |
| context, NULL, NULL, ScriptCompiler::kNoCompileOptions, NATIVES_CODE, |
| false); |
| if (function_info.is_null()) return false; |
| |
| DCHECK(context->IsNativeContext()); |
| |
| Handle<Context> runtime_context(context->runtime_context()); |
| Handle<JSBuiltinsObject> receiver(context->builtins()); |
| Handle<JSFunction> fun = |
| isolate->factory()->NewFunctionFromSharedFunctionInfo(function_info, |
| runtime_context); |
| |
| // For non-extension scripts, run script to get the function wrapper. |
| Handle<Object> wrapper; |
| if (!Execution::Call(isolate, fun, receiver, 0, NULL).ToHandle(&wrapper)) { |
| return false; |
| } |
| // Then run the function wrapper. |
| return !Execution::Call(isolate, Handle<JSFunction>::cast(wrapper), receiver, |
| argc, argv).is_null(); |
| } |
| |
| |
| bool Genesis::CallUtilsFunction(Isolate* isolate, const char* name) { |
| Handle<JSObject> utils = |
| Handle<JSObject>::cast(isolate->natives_utils_object()); |
| Handle<String> name_string = |
| isolate->factory()->NewStringFromAsciiChecked(name); |
| Handle<Object> fun = JSObject::GetDataProperty(utils, name_string); |
| Handle<Object> receiver = isolate->factory()->undefined_value(); |
| Handle<Object> args[] = {utils}; |
| return !Execution::Call(isolate, fun, receiver, 1, args).is_null(); |
| } |
| |
| |
| bool Genesis::CompileExtension(Isolate* isolate, v8::Extension* extension) { |
| Factory* factory = isolate->factory(); |
| HandleScope scope(isolate); |
| Handle<SharedFunctionInfo> function_info; |
| |
| Handle<String> source = |
| isolate->factory() |
| ->NewExternalStringFromOneByte(extension->source()) |
| .ToHandleChecked(); |
| DCHECK(source->IsOneByteRepresentation()); |
| |
| // If we can't find the function in the cache, we compile a new |
| // function and insert it into the cache. |
| Vector<const char> name = CStrVector(extension->name()); |
| SourceCodeCache* cache = isolate->bootstrapper()->extensions_cache(); |
| Handle<Context> context(isolate->context()); |
| DCHECK(context->IsNativeContext()); |
| |
| if (!cache->Lookup(name, &function_info)) { |
| Handle<String> script_name = |
| factory->NewStringFromUtf8(name).ToHandleChecked(); |
| function_info = Compiler::CompileScript( |
| source, script_name, 0, 0, ScriptOriginOptions(), Handle<Object>(), |
| context, extension, NULL, ScriptCompiler::kNoCompileOptions, |
| NOT_NATIVES_CODE, false); |
| if (function_info.is_null()) return false; |
| cache->Add(name, function_info); |
| } |
| |
| // Set up the function context. Conceptually, we should clone the |
| // function before overwriting the context but since we're in a |
| // single-threaded environment it is not strictly necessary. |
| Handle<JSFunction> fun = |
| factory->NewFunctionFromSharedFunctionInfo(function_info, context); |
| |
| // Call function using either the runtime object or the global |
| // object as the receiver. Provide no parameters. |
| Handle<Object> receiver = isolate->global_object(); |
| return !Execution::Call(isolate, fun, receiver, 0, NULL).is_null(); |
| } |
| |
| |
| static Handle<JSObject> ResolveBuiltinIdHolder(Handle<Context> native_context, |
| const char* holder_expr) { |
| Isolate* isolate = native_context->GetIsolate(); |
| Factory* factory = isolate->factory(); |
| Handle<GlobalObject> global(native_context->global_object()); |
| const char* period_pos = strchr(holder_expr, '.'); |
| if (period_pos == NULL) { |
| return Handle<JSObject>::cast( |
| Object::GetPropertyOrElement( |
| global, factory->InternalizeUtf8String(holder_expr)) |
| .ToHandleChecked()); |
| } |
| const char* inner = period_pos + 1; |
| DCHECK(!strchr(inner, '.')); |
| Vector<const char> property(holder_expr, |
| static_cast<int>(period_pos - holder_expr)); |
| Handle<String> property_string = factory->InternalizeUtf8String(property); |
| DCHECK(!property_string.is_null()); |
| Handle<JSObject> object = Handle<JSObject>::cast( |
| Object::GetProperty(global, property_string).ToHandleChecked()); |
| if (strcmp("prototype", inner) == 0) { |
| Handle<JSFunction> function = Handle<JSFunction>::cast(object); |
| return Handle<JSObject>(JSObject::cast(function->prototype())); |
| } |
| Handle<String> inner_string = factory->InternalizeUtf8String(inner); |
| DCHECK(!inner_string.is_null()); |
| Handle<Object> value = |
| Object::GetProperty(object, inner_string).ToHandleChecked(); |
| return Handle<JSObject>::cast(value); |
| } |
| |
| |
| #define INSTALL_NATIVE(Type, name, var) \ |
| Handle<String> var##_name = \ |
| factory()->InternalizeOneByteString(STATIC_CHAR_VECTOR(name)); \ |
| Handle<Object> var##_native = \ |
| Object::GetProperty(handle(native_context()->builtins()), var##_name) \ |
| .ToHandleChecked(); \ |
| native_context()->set_##var(Type::cast(*var##_native)); |
| |
| |
| void Genesis::InstallNativeFunctions() { |
| HandleScope scope(isolate()); |
| INSTALL_NATIVE(JSFunction, "$createDate", create_date_fun); |
| |
| INSTALL_NATIVE(JSFunction, "$toNumber", to_number_fun); |
| INSTALL_NATIVE(JSFunction, "$toString", to_string_fun); |
| INSTALL_NATIVE(JSFunction, "$toDetailString", to_detail_string_fun); |
| INSTALL_NATIVE(JSFunction, "$toObject", to_object_fun); |
| INSTALL_NATIVE(JSFunction, "$toInteger", to_integer_fun); |
| INSTALL_NATIVE(JSFunction, "$toUint32", to_uint32_fun); |
| INSTALL_NATIVE(JSFunction, "$toInt32", to_int32_fun); |
| INSTALL_NATIVE(JSFunction, "$toLength", to_length_fun); |
| |
| INSTALL_NATIVE(JSFunction, "$globalEval", global_eval_fun); |
| INSTALL_NATIVE(JSFunction, "$getStackTraceLine", get_stack_trace_line_fun); |
| INSTALL_NATIVE(JSFunction, "$toCompletePropertyDescriptor", |
| to_complete_property_descriptor); |
| |
| INSTALL_NATIVE(Symbol, "$promiseStatus", promise_status); |
| INSTALL_NATIVE(Symbol, "$promiseValue", promise_value); |
| INSTALL_NATIVE(JSFunction, "$promiseCreate", promise_create); |
| INSTALL_NATIVE(JSFunction, "$promiseResolve", promise_resolve); |
| INSTALL_NATIVE(JSFunction, "$promiseReject", promise_reject); |
| INSTALL_NATIVE(JSFunction, "$promiseChain", promise_chain); |
| INSTALL_NATIVE(JSFunction, "$promiseCatch", promise_catch); |
| INSTALL_NATIVE(JSFunction, "$promiseThen", promise_then); |
| |
| INSTALL_NATIVE(JSFunction, "$observeNotifyChange", observers_notify_change); |
| INSTALL_NATIVE(JSFunction, "$observeEnqueueSpliceRecord", |
| observers_enqueue_splice); |
| INSTALL_NATIVE(JSFunction, "$observeBeginPerformSplice", |
| observers_begin_perform_splice); |
| INSTALL_NATIVE(JSFunction, "$observeEndPerformSplice", |
| observers_end_perform_splice); |
| INSTALL_NATIVE(JSFunction, "$observeNativeObjectObserve", |
| native_object_observe); |
| INSTALL_NATIVE(JSFunction, "$observeNativeObjectGetNotifier", |
| native_object_get_notifier); |
| INSTALL_NATIVE(JSFunction, "$observeNativeObjectNotifierPerformChange", |
| native_object_notifier_perform_change); |
| INSTALL_NATIVE(JSFunction, "$arrayValues", array_values_iterator); |
| INSTALL_NATIVE(JSFunction, "$mapFromArray", map_from_array); |
| INSTALL_NATIVE(JSFunction, "$setFromArray", set_from_array); |
| } |
| |
| |
| void Genesis::InstallExperimentalNativeFunctions() { |
| if (FLAG_harmony_proxies) { |
| INSTALL_NATIVE(JSFunction, "$proxyDerivedHasTrap", derived_has_trap); |
| INSTALL_NATIVE(JSFunction, "$proxyDerivedGetTrap", derived_get_trap); |
| INSTALL_NATIVE(JSFunction, "$proxyDerivedSetTrap", derived_set_trap); |
| INSTALL_NATIVE(JSFunction, "$proxyEnumerate", proxy_enumerate); |
| } |
| |
| #define INSTALL_NATIVE_FUNCTIONS_FOR(id, descr) InstallNativeFunctions_##id(); |
| HARMONY_INPROGRESS(INSTALL_NATIVE_FUNCTIONS_FOR) |
| HARMONY_STAGED(INSTALL_NATIVE_FUNCTIONS_FOR) |
| HARMONY_SHIPPING(INSTALL_NATIVE_FUNCTIONS_FOR) |
| #undef INSTALL_NATIVE_FUNCTIONS_FOR |
| } |
| |
| |
| template <typename Data> |
| Data* SetBuiltinTypedArray(Isolate* isolate, Handle<JSBuiltinsObject> builtins, |
| ExternalArrayType type, Data* data, |
| size_t num_elements, const char* name) { |
| size_t byte_length = num_elements * sizeof(*data); |
| Handle<JSArrayBuffer> buffer = isolate->factory()->NewJSArrayBuffer(); |
| bool is_external = data != nullptr; |
| if (!is_external) { |
| data = reinterpret_cast<Data*>( |
| isolate->array_buffer_allocator()->Allocate(byte_length)); |
| } |
| Runtime::SetupArrayBuffer(isolate, buffer, is_external, data, byte_length); |
| |
| Handle<JSTypedArray> typed_array = |
| isolate->factory()->NewJSTypedArray(type, buffer, 0, num_elements); |
| Handle<String> name_string = isolate->factory()->InternalizeUtf8String(name); |
| // Reset property cell type before (re)initializing. |
| JSBuiltinsObject::InvalidatePropertyCell(builtins, name_string); |
| JSObject::SetOwnPropertyIgnoreAttributes(builtins, name_string, typed_array, |
| DONT_DELETE).Assert(); |
| return data; |
| } |
| |
| |
| void Genesis::InitializeBuiltinTypedArrays() { |
| Handle<JSBuiltinsObject> builtins(native_context()->builtins()); |
| { // Initially seed the per-context random number generator using the |
| // per-isolate random number generator. |
| const size_t num_elements = 2; |
| const size_t num_bytes = num_elements * sizeof(uint32_t); |
| uint32_t* state = SetBuiltinTypedArray<uint32_t>(isolate(), builtins, |
| kExternalUint32Array, NULL, |
| num_elements, "rngstate"); |
| do { |
| isolate()->random_number_generator()->NextBytes(state, num_bytes); |
| } while (state[0] == 0 || state[1] == 0); |
| } |
| |
| { // Initialize trigonometric lookup tables and constants. |
| const size_t num_elements = arraysize(fdlibm::MathConstants::constants); |
| double* data = const_cast<double*>(fdlibm::MathConstants::constants); |
| SetBuiltinTypedArray<double>(isolate(), builtins, kExternalFloat64Array, |
| data, num_elements, "kMath"); |
| } |
| |
| { // Initialize a result array for rempio2 calculation |
| const size_t num_elements = 2; |
| double* data = |
| SetBuiltinTypedArray<double>(isolate(), builtins, kExternalFloat64Array, |
| NULL, num_elements, "rempio2result"); |
| for (size_t i = 0; i < num_elements; i++) data[i] = 0; |
| } |
| } |
| |
| |
| #define EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(id) \ |
| void Genesis::InstallNativeFunctions_##id() {} |
| |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_modules) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_arrays) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_array_includes) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_classes) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_object_literals) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_regexps) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_arrow_functions) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_tostring) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_sloppy) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_unicode) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_unicode_regexps) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_computed_property_names) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_rest_parameters) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_reflect) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_spreadcalls) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_destructuring) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_object) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_spread_arrays) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_sharedarraybuffer) |
| EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_default_parameters) |
| |
| |
| void Genesis::InstallNativeFunctions_harmony_proxies() { |
| if (FLAG_harmony_proxies) { |
| INSTALL_NATIVE(JSFunction, "$proxyDerivedHasTrap", derived_has_trap); |
| INSTALL_NATIVE(JSFunction, "$proxyDerivedGetTrap", derived_get_trap); |
| INSTALL_NATIVE(JSFunction, "$proxyDerivedSetTrap", derived_set_trap); |
| INSTALL_NATIVE(JSFunction, "$proxyEnumerate", proxy_enumerate); |
| } |
| } |
| |
| #undef INSTALL_NATIVE |
| |
| #define EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(id) \ |
| void Genesis::InitializeGlobal_##id() {} |
| |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_modules) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_arrays) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_array_includes) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_classes) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_object_literals) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_arrow_functions) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_proxies) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_unicode) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_computed_property_names) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_rest_parameters) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_spreadcalls) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_destructuring) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_object) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_spread_arrays) |
| EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_default_parameters) |
| |
| void Genesis::InitializeGlobal_harmony_regexps() { |
| Handle<JSObject> builtins(native_context()->builtins()); |
| |
| Handle<HeapObject> flag(FLAG_harmony_regexps ? heap()->true_value() |
| : heap()->false_value()); |
| Runtime::SetObjectProperty(isolate(), builtins, |
| factory()->harmony_regexps_string(), flag, |
| STRICT).Assert(); |
| } |
| |
| |
| void Genesis::InitializeGlobal_harmony_unicode_regexps() { |
| Handle<JSObject> builtins(native_context()->builtins()); |
| |
| Handle<HeapObject> flag(FLAG_harmony_unicode_regexps ? heap()->true_value() |
| : heap()->false_value()); |
| Runtime::SetObjectProperty(isolate(), builtins, |
| factory()->harmony_unicode_regexps_string(), flag, |
| STRICT).Assert(); |
| } |
| |
| |
| void Genesis::InitializeGlobal_harmony_reflect() { |
| Handle<JSObject> builtins(native_context()->builtins()); |
| // Install references to functions of the Reflect object |
| if (FLAG_harmony_reflect || FLAG_harmony_spreadcalls) { |
| Handle<JSFunction> apply = InstallFunction( |
| builtins, "$reflectApply", JS_OBJECT_TYPE, JSObject::kHeaderSize, |
| MaybeHandle<JSObject>(), Builtins::kReflectApply); |
| Handle<JSFunction> construct = InstallFunction( |
| builtins, "$reflectConstruct", JS_OBJECT_TYPE, JSObject::kHeaderSize, |
| MaybeHandle<JSObject>(), Builtins::kReflectConstruct); |
| apply->shared()->set_internal_formal_parameter_count(3); |
| apply->shared()->set_length(3); |
| |
| construct->shared()->set_internal_formal_parameter_count(3); |
| construct->shared()->set_length(2); |
| } |
| |
| if (!FLAG_harmony_reflect) return; |
| Handle<JSGlobalObject> global(JSGlobalObject::cast( |
| native_context()->global_object())); |
| Handle<String> reflect_string = |
| factory()->NewStringFromStaticChars("Reflect"); |
| Handle<Object> reflect = |
| factory()->NewJSObject(isolate()->object_function(), TENURED); |
| JSObject::AddProperty(global, reflect_string, reflect, DONT_ENUM); |
| } |
| |
| |
| void Genesis::InitializeGlobal_harmony_tostring() { |
| Handle<JSObject> builtins(native_context()->builtins()); |
| |
| Handle<HeapObject> flag(FLAG_harmony_tostring ? heap()->true_value() |
| : heap()->false_value()); |
| Runtime::SetObjectProperty(isolate(), builtins, |
| factory()->harmony_tostring_string(), flag, |
| STRICT).Assert(); |
| } |
| |
| |
| void Genesis::InitializeGlobal_harmony_sharedarraybuffer() { |
| if (!FLAG_harmony_sharedarraybuffer) return; |
| |
| Handle<JSGlobalObject> global( |
| JSGlobalObject::cast(native_context()->global_object())); |
| |
| Handle<JSFunction> shared_array_buffer_fun = InstallFunction( |
| global, "SharedArrayBuffer", JS_ARRAY_BUFFER_TYPE, |
| JSArrayBuffer::kSizeWithInternalFields, |
| isolate()->initial_object_prototype(), Builtins::kIllegal); |
| native_context()->set_shared_array_buffer_fun(*shared_array_buffer_fun); |
| } |
| |
| |
| Handle<JSFunction> Genesis::InstallInternalArray(Handle<JSObject> target, |
| const char* name, |
| ElementsKind elements_kind) { |
| // --- I n t e r n a l A r r a y --- |
| // An array constructor on the builtins object that works like |
| // the public Array constructor, except that its prototype |
| // doesn't inherit from Object.prototype. |
| // To be used only for internal work by builtins. Instances |
| // must not be leaked to user code. |
| Handle<JSObject> prototype = |
| factory()->NewJSObject(isolate()->object_function(), TENURED); |
| Handle<JSFunction> array_function = |
| InstallFunction(target, name, JS_ARRAY_TYPE, JSArray::kSize, prototype, |
| Builtins::kInternalArrayCode); |
| |
| InternalArrayConstructorStub internal_array_constructor_stub(isolate()); |
| Handle<Code> code = internal_array_constructor_stub.GetCode(); |
| array_function->shared()->set_construct_stub(*code); |
| array_function->shared()->DontAdaptArguments(); |
| |
| Handle<Map> original_map(array_function->initial_map()); |
| Handle<Map> initial_map = Map::Copy(original_map, "InternalArray"); |
| initial_map->set_elements_kind(elements_kind); |
| JSFunction::SetInitialMap(array_function, initial_map, prototype); |
| |
| // Make "length" magic on instances. |
| Map::EnsureDescriptorSlack(initial_map, 1); |
| |
| PropertyAttributes attribs = static_cast<PropertyAttributes>( |
| DONT_ENUM | DONT_DELETE); |
| |
| Handle<AccessorInfo> array_length = |
| Accessors::ArrayLengthInfo(isolate(), attribs); |
| { // Add length. |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(array_length->name())), |
| array_length, attribs); |
| initial_map->AppendDescriptor(&d); |
| } |
| |
| return array_function; |
| } |
| |
| |
| bool Genesis::InstallNatives() { |
| HandleScope scope(isolate()); |
| |
| // Create a function for the builtins object. Allocate space for the |
| // JavaScript builtins, a reference to the builtins object |
| // (itself) and a reference to the native_context directly in the object. |
| Handle<Code> code = Handle<Code>( |
| isolate()->builtins()->builtin(Builtins::kIllegal)); |
| Handle<JSFunction> builtins_fun = factory()->NewFunction( |
| factory()->empty_string(), code, JS_BUILTINS_OBJECT_TYPE, |
| JSBuiltinsObject::kSize); |
| |
| Handle<String> name = |
| factory()->InternalizeOneByteString(STATIC_CHAR_VECTOR("builtins")); |
| builtins_fun->shared()->set_instance_class_name(*name); |
| builtins_fun->initial_map()->set_dictionary_map(true); |
| builtins_fun->initial_map()->set_prototype(heap()->null_value()); |
| |
| // Allocate the builtins object. |
| Handle<JSBuiltinsObject> builtins = |
| Handle<JSBuiltinsObject>::cast(factory()->NewGlobalObject(builtins_fun)); |
| builtins->set_builtins(*builtins); |
| builtins->set_native_context(*native_context()); |
| builtins->set_global_proxy(native_context()->global_proxy()); |
| |
| |
| // Set up the 'builtin' property, which refers to the js builtins object. |
| static const PropertyAttributes attributes = |
| static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE); |
| Handle<String> builtins_string = |
| factory()->InternalizeOneByteString(STATIC_CHAR_VECTOR("builtins")); |
| JSObject::AddProperty(builtins, builtins_string, builtins, attributes); |
| |
| // Set up the reference from the global object to the builtins object. |
| JSGlobalObject::cast(native_context()->global_object())-> |
| set_builtins(*builtins); |
| |
| // Create a bridge function that has context in the native context. |
| Handle<JSFunction> bridge = factory()->NewFunction(factory()->empty_string()); |
| DCHECK(bridge->context() == *isolate()->native_context()); |
| |
| // Allocate the builtins context. |
| Handle<Context> context = |
| factory()->NewFunctionContext(Context::MIN_CONTEXT_SLOTS, bridge); |
| context->set_global_object(*builtins); // override builtins global object |
| |
| native_context()->set_runtime_context(*context); |
| |
| // Set up the utils object as shared container between native scripts. |
| Handle<JSObject> utils = factory()->NewJSObject(isolate()->object_function()); |
| JSObject::NormalizeProperties(utils, CLEAR_INOBJECT_PROPERTIES, 16, |
| "utils container for native scripts"); |
| native_context()->set_natives_utils_object(*utils); |
| |
| Handle<JSObject> extras_exports = |
| factory()->NewJSObject(isolate()->object_function()); |
| JSObject::NormalizeProperties(extras_exports, CLEAR_INOBJECT_PROPERTIES, 2, |
| "container to export to extra natives"); |
| native_context()->set_extras_exports_object(*extras_exports); |
| |
| if (FLAG_expose_natives_as != NULL) { |
| Handle<String> utils_key = factory()->NewStringFromAsciiChecked("utils"); |
| JSObject::AddProperty(builtins, utils_key, utils, NONE); |
| } |
| |
| { // -- S c r i p t |
| // Builtin functions for Script. |
| Handle<JSFunction> script_fun = InstallFunction( |
| builtins, "Script", JS_VALUE_TYPE, JSValue::kSize, |
| isolate()->initial_object_prototype(), Builtins::kIllegal); |
| Handle<JSObject> prototype = |
| factory()->NewJSObject(isolate()->object_function(), TENURED); |
| Accessors::FunctionSetPrototype(script_fun, prototype).Assert(); |
| native_context()->set_script_function(*script_fun); |
| |
| Handle<Map> script_map = Handle<Map>(script_fun->initial_map()); |
| Map::EnsureDescriptorSlack(script_map, 15); |
| |
| PropertyAttributes attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| |
| Handle<AccessorInfo> script_column = |
| Accessors::ScriptColumnOffsetInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_column->name())), script_column, |
| attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_id = |
| Accessors::ScriptIdInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d(Handle<Name>(Name::cast(script_id->name())), |
| script_id, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| |
| Handle<AccessorInfo> script_name = |
| Accessors::ScriptNameInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_name->name())), script_name, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_line = |
| Accessors::ScriptLineOffsetInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_line->name())), script_line, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_source = |
| Accessors::ScriptSourceInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_source->name())), script_source, |
| attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_type = |
| Accessors::ScriptTypeInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_type->name())), script_type, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_compilation_type = |
| Accessors::ScriptCompilationTypeInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_compilation_type->name())), |
| script_compilation_type, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_line_ends = |
| Accessors::ScriptLineEndsInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_line_ends->name())), script_line_ends, |
| attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_context_data = |
| Accessors::ScriptContextDataInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_context_data->name())), |
| script_context_data, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_eval_from_script = |
| Accessors::ScriptEvalFromScriptInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_eval_from_script->name())), |
| script_eval_from_script, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_eval_from_script_position = |
| Accessors::ScriptEvalFromScriptPositionInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_eval_from_script_position->name())), |
| script_eval_from_script_position, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_eval_from_function_name = |
| Accessors::ScriptEvalFromFunctionNameInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_eval_from_function_name->name())), |
| script_eval_from_function_name, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_source_url = |
| Accessors::ScriptSourceUrlInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_source_url->name())), |
| script_source_url, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_source_mapping_url = |
| Accessors::ScriptSourceMappingUrlInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_source_mapping_url->name())), |
| script_source_mapping_url, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_is_embedder_debug_script = |
| Accessors::ScriptIsEmbedderDebugScriptInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d( |
| Handle<Name>(Name::cast(script_is_embedder_debug_script->name())), |
| script_is_embedder_debug_script, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| // Allocate the empty script. |
| Handle<Script> script = factory()->NewScript(factory()->empty_string()); |
| script->set_type(Smi::FromInt(Script::TYPE_NATIVE)); |
| heap()->public_set_empty_script(*script); |
| } |
| { |
| // Builtin function for OpaqueReference -- a JSValue-based object, |
| // that keeps its field isolated from JavaScript code. It may store |
| // objects, that JavaScript code may not access. |
| Handle<JSFunction> opaque_reference_fun = InstallFunction( |
| builtins, "OpaqueReference", JS_VALUE_TYPE, JSValue::kSize, |
| isolate()->initial_object_prototype(), Builtins::kIllegal); |
| Handle<JSObject> prototype = |
| factory()->NewJSObject(isolate()->object_function(), TENURED); |
| Accessors::FunctionSetPrototype(opaque_reference_fun, prototype).Assert(); |
| native_context()->set_opaque_reference_function(*opaque_reference_fun); |
| } |
| |
| // InternalArrays should not use Smi-Only array optimizations. There are too |
| // many places in the C++ runtime code (e.g. RegEx) that assume that |
| // elements in InternalArrays can be set to non-Smi values without going |
| // through a common bottleneck that would make the SMI_ONLY -> FAST_ELEMENT |
| // transition easy to trap. Moreover, they rarely are smi-only. |
| { |
| HandleScope scope(isolate()); |
| Handle<JSObject> utils = |
| Handle<JSObject>::cast(isolate()->natives_utils_object()); |
| Handle<JSFunction> array_function = |
| InstallInternalArray(utils, "InternalArray", FAST_HOLEY_ELEMENTS); |
| native_context()->set_internal_array_function(*array_function); |
| InstallInternalArray(utils, "InternalPackedArray", FAST_ELEMENTS); |
| } |
| |
| { // -- S e t I t e r a t o r |
| Handle<JSFunction> set_iterator_function = InstallFunction( |
| builtins, "SetIterator", JS_SET_ITERATOR_TYPE, JSSetIterator::kSize, |
| isolate()->initial_object_prototype(), Builtins::kIllegal); |
| native_context()->set_set_iterator_map( |
| set_iterator_function->initial_map()); |
| } |
| |
| { // -- M a p I t e r a t o r |
| Handle<JSFunction> map_iterator_function = InstallFunction( |
| builtins, "MapIterator", JS_MAP_ITERATOR_TYPE, JSMapIterator::kSize, |
| isolate()->initial_object_prototype(), Builtins::kIllegal); |
| native_context()->set_map_iterator_map( |
| map_iterator_function->initial_map()); |
| } |
| |
| { |
| // Create generator meta-objects and install them on the builtins object. |
| Handle<JSObject> builtins(native_context()->builtins()); |
| Handle<JSObject> iterator_prototype = |
| factory()->NewJSObject(isolate()->object_function(), TENURED); |
| Handle<JSObject> generator_object_prototype = |
| factory()->NewJSObject(isolate()->object_function(), TENURED); |
| Handle<JSObject> generator_function_prototype = |
| factory()->NewJSObject(isolate()->object_function(), TENURED); |
| SetObjectPrototype(generator_object_prototype, iterator_prototype); |
| JSObject::AddProperty( |
| builtins, factory()->InternalizeUtf8String("$iteratorPrototype"), |
| iterator_prototype, |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY)); |
| JSObject::AddProperty( |
| builtins, |
| factory()->InternalizeUtf8String("GeneratorFunctionPrototype"), |
| generator_function_prototype, |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY)); |
| |
| JSObject::AddProperty( |
| generator_function_prototype, |
| factory()->InternalizeUtf8String("prototype"), |
| generator_object_prototype, |
| static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); |
| |
| static const bool kUseStrictFunctionMap = true; |
| InstallFunction(builtins, "GeneratorFunction", JS_FUNCTION_TYPE, |
| JSFunction::kSize, generator_function_prototype, |
| Builtins::kIllegal, kUseStrictFunctionMap); |
| |
| // 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). |
| Handle<Map> strict_function_map(strict_function_map_writable_prototype_); |
| // Generator functions do not have "caller" or "arguments" accessors. |
| Handle<Map> sloppy_generator_function_map = |
| Map::Copy(strict_function_map, "SloppyGeneratorFunction"); |
| Map::SetPrototype(sloppy_generator_function_map, |
| generator_function_prototype); |
| native_context()->set_sloppy_generator_function_map( |
| *sloppy_generator_function_map); |
| |
| Handle<Map> strict_generator_function_map = |
| Map::Copy(strict_function_map, "StrictGeneratorFunction"); |
| Map::SetPrototype(strict_generator_function_map, |
| generator_function_prototype); |
| native_context()->set_strict_generator_function_map( |
| *strict_generator_function_map); |
| |
| Handle<Map> strong_function_map(native_context()->strong_function_map()); |
| Handle<Map> strong_generator_function_map = |
| Map::Copy(strong_function_map, "StrongGeneratorFunction"); |
| Map::SetPrototype(strong_generator_function_map, |
| generator_function_prototype); |
| native_context()->set_strong_generator_function_map( |
| *strong_generator_function_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); |
| } |
| |
| if (FLAG_disable_native_files) { |
| PrintF("Warning: Running without installed natives!\n"); |
| return true; |
| } |
| |
| // Install public symbols. |
| { |
| static const PropertyAttributes attributes = |
| static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE); |
| #define INSTALL_PUBLIC_SYMBOL(name, varname, description) \ |
| Handle<String> varname = factory()->NewStringFromStaticChars(#varname); \ |
| JSObject::AddProperty(builtins, varname, factory()->name(), attributes); |
| PUBLIC_SYMBOL_LIST(INSTALL_PUBLIC_SYMBOL) |
| #undef INSTALL_PUBLIC_SYMBOL |
| } |
| |
| int i = Natives::GetDebuggerCount(); |
| if (!CompileBuiltin(isolate(), i)) return false; |
| if (!InstallJSBuiltins(builtins)) return false; |
| |
| for (++i; i < Natives::GetBuiltinsCount(); ++i) { |
| if (!CompileBuiltin(isolate(), i)) return false; |
| } |
| |
| if (!CallUtilsFunction(isolate(), "PostNatives")) return false; |
| |
| InstallNativeFunctions(); |
| |
| auto function_cache = |
| ObjectHashTable::New(isolate(), ApiNatives::kInitialFunctionCacheSize); |
| native_context()->set_function_cache(*function_cache); |
| |
| // Store the map for the string prototype after the natives has been compiled |
| // and the String function has been set up. |
| Handle<JSFunction> string_function(native_context()->string_function()); |
| DCHECK(JSObject::cast( |
| string_function->initial_map()->prototype())->HasFastProperties()); |
| native_context()->set_string_function_prototype_map( |
| HeapObject::cast(string_function->initial_map()->prototype())->map()); |
| |
| // Install Function.prototype.call and apply. |
| { |
| Handle<String> key = factory()->Function_string(); |
| Handle<JSFunction> function = |
| Handle<JSFunction>::cast(Object::GetProperty( |
| handle(native_context()->global_object()), key).ToHandleChecked()); |
| Handle<JSObject> proto = |
| Handle<JSObject>(JSObject::cast(function->instance_prototype())); |
| |
| // Install the call and the apply functions. |
| Handle<JSFunction> call = |
| InstallFunction(proto, "call", JS_OBJECT_TYPE, JSObject::kHeaderSize, |
| MaybeHandle<JSObject>(), Builtins::kFunctionCall); |
| Handle<JSFunction> apply = |
| InstallFunction(proto, "apply", JS_OBJECT_TYPE, JSObject::kHeaderSize, |
| MaybeHandle<JSObject>(), Builtins::kFunctionApply); |
| |
| // Make sure that Function.prototype.call appears to be compiled. |
| // The code will never be called, but inline caching for call will |
| // only work if it appears to be compiled. |
| call->shared()->DontAdaptArguments(); |
| DCHECK(call->is_compiled()); |
| |
| // Set the expected parameters for apply to 2; required by builtin. |
| apply->shared()->set_internal_formal_parameter_count(2); |
| |
| // Set the lengths for the functions to satisfy ECMA-262. |
| call->shared()->set_length(1); |
| apply->shared()->set_length(2); |
| } |
| |
| InstallBuiltinFunctionIds(); |
| |
| // Create a constructor for RegExp results (a variant of Array that |
| // predefines the two properties index and match). |
| { |
| // RegExpResult initial map. |
| |
| // Find global.Array.prototype to inherit from. |
| Handle<JSFunction> array_constructor(native_context()->array_function()); |
| Handle<JSObject> array_prototype( |
| JSObject::cast(array_constructor->instance_prototype())); |
| |
| // Add initial map. |
| Handle<Map> initial_map = |
| factory()->NewMap(JS_ARRAY_TYPE, JSRegExpResult::kSize); |
| initial_map->SetConstructor(*array_constructor); |
| |
| // Set prototype on map. |
| initial_map->set_non_instance_prototype(false); |
| Map::SetPrototype(initial_map, array_prototype); |
| |
| // Update map with length accessor from Array and add "index" and "input". |
| Map::EnsureDescriptorSlack(initial_map, 3); |
| |
| { |
| JSFunction* array_function = native_context()->array_function(); |
| Handle<DescriptorArray> array_descriptors( |
| array_function->initial_map()->instance_descriptors()); |
| Handle<String> length = factory()->length_string(); |
| int old = array_descriptors->SearchWithCache( |
| *length, array_function->initial_map()); |
| DCHECK(old != DescriptorArray::kNotFound); |
| AccessorConstantDescriptor desc( |
| length, handle(array_descriptors->GetValue(old), isolate()), |
| array_descriptors->GetDetails(old).attributes()); |
| initial_map->AppendDescriptor(&desc); |
| } |
| { |
| DataDescriptor index_field(factory()->index_string(), |
| JSRegExpResult::kIndexIndex, NONE, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&index_field); |
| } |
| |
| { |
| DataDescriptor input_field(factory()->input_string(), |
| JSRegExpResult::kInputIndex, NONE, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&input_field); |
| } |
| |
| initial_map->set_inobject_properties(2); |
| initial_map->set_pre_allocated_property_fields(2); |
| initial_map->set_unused_property_fields(0); |
| |
| native_context()->set_regexp_result_map(*initial_map); |
| } |
| |
| // Add @@iterator method to the arguments object maps. |
| { |
| PropertyAttributes attribs = DONT_ENUM; |
| Handle<AccessorInfo> arguments_iterator = |
| Accessors::ArgumentsIteratorInfo(isolate(), attribs); |
| { |
| AccessorConstantDescriptor d(factory()->iterator_symbol(), |
| arguments_iterator, attribs); |
| Handle<Map> map(native_context()->sloppy_arguments_map()); |
| Map::EnsureDescriptorSlack(map, 1); |
| map->AppendDescriptor(&d); |
| } |
| { |
| AccessorConstantDescriptor d(factory()->iterator_symbol(), |
| arguments_iterator, attribs); |
| Handle<Map> map(native_context()->aliased_arguments_map()); |
| Map::EnsureDescriptorSlack(map, 1); |
| map->AppendDescriptor(&d); |
| } |
| { |
| AccessorConstantDescriptor d(factory()->iterator_symbol(), |
| arguments_iterator, attribs); |
| Handle<Map> map(native_context()->strict_arguments_map()); |
| Map::EnsureDescriptorSlack(map, 1); |
| map->AppendDescriptor(&d); |
| } |
| } |
| |
| #ifdef VERIFY_HEAP |
| if (FLAG_verify_heap) { |
| builtins->ObjectVerify(); |
| } |
| #endif |
| |
| return true; |
| } |
| |
| |
| bool Genesis::InstallExperimentalNatives() { |
| static const char* harmony_arrays_natives[] = { |
| "native harmony-array.js", "native harmony-typedarray.js", nullptr}; |
| static const char* harmony_array_includes_natives[] = { |
| "native harmony-array-includes.js", nullptr}; |
| static const char* harmony_proxies_natives[] = {"native proxy.js", nullptr}; |
| static const char* harmony_classes_natives[] = {nullptr}; |
| static const char* harmony_modules_natives[] = {nullptr}; |
| static const char* harmony_object_literals_natives[] = {nullptr}; |
| static const char* harmony_regexps_natives[] = {"native harmony-regexp.js", |
| nullptr}; |
| static const char* harmony_arrow_functions_natives[] = {nullptr}; |
| static const char* harmony_tostring_natives[] = {"native harmony-tostring.js", |
| nullptr}; |
| static const char* harmony_sloppy_natives[] = {nullptr}; |
| static const char* harmony_unicode_natives[] = {nullptr}; |
| static const char* harmony_unicode_regexps_natives[] = {nullptr}; |
| static const char* harmony_computed_property_names_natives[] = {nullptr}; |
| static const char* harmony_rest_parameters_natives[] = {nullptr}; |
| static const char* harmony_reflect_natives[] = {"native harmony-reflect.js", |
| nullptr}; |
| static const char* harmony_spreadcalls_natives[] = { |
| "native harmony-spread.js", nullptr}; |
| static const char* harmony_destructuring_natives[] = {nullptr}; |
| static const char* harmony_object_natives[] = {"native harmony-object.js", |
| NULL}; |
| static const char* harmony_spread_arrays_natives[] = {nullptr}; |
| static const char* harmony_sharedarraybuffer_natives[] = { |
| "native harmony-sharedarraybuffer.js", NULL}; |
| static const char* harmony_default_parameters_natives[] = {nullptr}; |
| |
| for (int i = ExperimentalNatives::GetDebuggerCount(); |
| i < ExperimentalNatives::GetBuiltinsCount(); i++) { |
| #define INSTALL_EXPERIMENTAL_NATIVES(id, desc) \ |
| if (FLAG_##id) { \ |
| for (size_t j = 0; id##_natives[j] != NULL; j++) { \ |
| Vector<const char> script_name = ExperimentalNatives::GetScriptName(i); \ |
| if (strncmp(script_name.start(), id##_natives[j], \ |
| script_name.length()) == 0) { \ |
| if (!CompileExperimentalBuiltin(isolate(), i)) return false; \ |
| } \ |
| } \ |
| } |
| HARMONY_INPROGRESS(INSTALL_EXPERIMENTAL_NATIVES); |
| HARMONY_STAGED(INSTALL_EXPERIMENTAL_NATIVES); |
| HARMONY_SHIPPING(INSTALL_EXPERIMENTAL_NATIVES); |
| #undef INSTALL_EXPERIMENTAL_NATIVES |
| } |
| |
| CallUtilsFunction(isolate(), "PostExperimentals"); |
| |
| InstallExperimentalNativeFunctions(); |
| return true; |
| } |
| |
| |
| bool Genesis::InstallExtraNatives() { |
| for (int i = ExtraNatives::GetDebuggerCount(); |
| i < ExtraNatives::GetBuiltinsCount(); i++) { |
| if (!CompileExtraBuiltin(isolate(), i)) return false; |
| } |
| |
| return true; |
| } |
| |
| |
| static void InstallBuiltinFunctionId(Handle<JSObject> holder, |
| const char* function_name, |
| BuiltinFunctionId id) { |
| Isolate* isolate = holder->GetIsolate(); |
| Handle<Object> function_object = |
| Object::GetProperty(isolate, holder, function_name).ToHandleChecked(); |
| Handle<JSFunction> function = Handle<JSFunction>::cast(function_object); |
| function->shared()->set_function_data(Smi::FromInt(id)); |
| } |
| |
| |
| void Genesis::InstallBuiltinFunctionIds() { |
| HandleScope scope(isolate()); |
| struct BuiltinFunctionIds { |
| const char* holder_expr; |
| const char* fun_name; |
| BuiltinFunctionId id; |
| }; |
| |
| #define INSTALL_BUILTIN_ID(holder_expr, fun_name, name) \ |
| { #holder_expr, #fun_name, k##name } \ |
| , |
| const BuiltinFunctionIds builtins[] = { |
| FUNCTIONS_WITH_ID_LIST(INSTALL_BUILTIN_ID)}; |
| #undef INSTALL_BUILTIN_ID |
| |
| for (const BuiltinFunctionIds& builtin : builtins) { |
| Handle<JSObject> holder = |
| ResolveBuiltinIdHolder(native_context(), builtin.holder_expr); |
| InstallBuiltinFunctionId(holder, builtin.fun_name, builtin.id); |
| } |
| } |
| |
| |
| // Do not forget to update macros.py with named constant |
| // of cache id. |
| #define JSFUNCTION_RESULT_CACHE_LIST(F) \ |
| F(16, native_context()->regexp_function()) |
| |
| |
| static FixedArray* CreateCache(int size, Handle<JSFunction> factory_function) { |
| Factory* factory = factory_function->GetIsolate()->factory(); |
| // Caches are supposed to live for a long time, allocate in old space. |
| int array_size = JSFunctionResultCache::kEntriesIndex + 2 * size; |
| // Cannot use cast as object is not fully initialized yet. |
| JSFunctionResultCache* cache = reinterpret_cast<JSFunctionResultCache*>( |
| *factory->NewFixedArrayWithHoles(array_size, TENURED)); |
| cache->set(JSFunctionResultCache::kFactoryIndex, *factory_function); |
| cache->MakeZeroSize(); |
| return cache; |
| } |
| |
| |
| void Genesis::InstallJSFunctionResultCaches() { |
| const int kNumberOfCaches = 0 + |
| #define F(size, func) + 1 |
| JSFUNCTION_RESULT_CACHE_LIST(F) |
| #undef F |
| ; |
| |
| Handle<FixedArray> caches = |
| factory()->NewFixedArray(kNumberOfCaches, TENURED); |
| |
| int index = 0; |
| |
| #define F(size, func) do { \ |
| FixedArray* cache = CreateCache((size), Handle<JSFunction>(func)); \ |
| caches->set(index++, cache); \ |
| } while (false) |
| |
| JSFUNCTION_RESULT_CACHE_LIST(F); |
| |
| #undef F |
| |
| native_context()->set_jsfunction_result_caches(*caches); |
| } |
| |
| |
| void Genesis::InitializeNormalizedMapCaches() { |
| Handle<NormalizedMapCache> cache = NormalizedMapCache::New(isolate()); |
| native_context()->set_normalized_map_cache(*cache); |
| } |
| |
| |
| bool Bootstrapper::InstallExtensions(Handle<Context> native_context, |
| v8::ExtensionConfiguration* extensions) { |
| BootstrapperActive active(this); |
| SaveContext saved_context(isolate_); |
| isolate_->set_context(*native_context); |
| return Genesis::InstallExtensions(native_context, extensions) && |
| Genesis::InstallSpecialObjects(native_context); |
| } |
| |
| |
| bool Genesis::InstallSpecialObjects(Handle<Context> native_context) { |
| Isolate* isolate = native_context->GetIsolate(); |
| // Don't install extensions into the snapshot. |
| if (isolate->serializer_enabled()) return true; |
| |
| Factory* factory = isolate->factory(); |
| HandleScope scope(isolate); |
| Handle<JSGlobalObject> global(JSGlobalObject::cast( |
| native_context->global_object())); |
| |
| Handle<JSObject> Error = Handle<JSObject>::cast( |
| Object::GetProperty(isolate, global, "Error").ToHandleChecked()); |
| Handle<String> name = |
| factory->InternalizeOneByteString(STATIC_CHAR_VECTOR("stackTraceLimit")); |
| Handle<Smi> stack_trace_limit(Smi::FromInt(FLAG_stack_trace_limit), isolate); |
| JSObject::AddProperty(Error, name, stack_trace_limit, NONE); |
| |
| // By now the utils object is useless and can be removed. |
| native_context->set_natives_utils_object(*factory->undefined_value()); |
| |
| // Expose the natives in global if a name for it is specified. |
| if (FLAG_expose_natives_as != NULL && strlen(FLAG_expose_natives_as) != 0) { |
| Handle<String> natives_key = |
| factory->InternalizeUtf8String(FLAG_expose_natives_as); |
| uint32_t dummy_index; |
| if (natives_key->AsArrayIndex(&dummy_index)) return true; |
| Handle<JSBuiltinsObject> natives(global->builtins()); |
| JSObject::AddProperty(global, natives_key, natives, DONT_ENUM); |
| } |
| |
| // Expose the stack trace symbol to native JS. |
| RETURN_ON_EXCEPTION_VALUE(isolate, |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| handle(native_context->builtins(), isolate), |
| factory->InternalizeOneByteString( |
| STATIC_CHAR_VECTOR("$stackTraceSymbol")), |
| factory->stack_trace_symbol(), NONE), |
| false); |
| |
| // Expose the debug global object in global if a name for it is specified. |
| if (FLAG_expose_debug_as != NULL && strlen(FLAG_expose_debug_as) != 0) { |
| // If loading fails we just bail out without installing the |
| // debugger but without tanking the whole context. |
| Debug* debug = isolate->debug(); |
| if (!debug->Load()) return true; |
| Handle<Context> debug_context = debug->debug_context(); |
| // Set the security token for the debugger context to the same as |
| // the shell native context to allow calling between these (otherwise |
| // exposing debug global object doesn't make much sense). |
| debug_context->set_security_token(native_context->security_token()); |
| Handle<String> debug_string = |
| factory->InternalizeUtf8String(FLAG_expose_debug_as); |
| uint32_t index; |
| if (debug_string->AsArrayIndex(&index)) return true; |
| Handle<Object> global_proxy(debug_context->global_proxy(), isolate); |
| JSObject::AddProperty(global, debug_string, global_proxy, DONT_ENUM); |
| } |
| return true; |
| } |
| |
| |
| static uint32_t Hash(RegisteredExtension* extension) { |
| return v8::internal::ComputePointerHash(extension); |
| } |
| |
| |
| Genesis::ExtensionStates::ExtensionStates() : map_(HashMap::PointersMatch, 8) {} |
| |
| Genesis::ExtensionTraversalState Genesis::ExtensionStates::get_state( |
| RegisteredExtension* extension) { |
| i::HashMap::Entry* entry = map_.Lookup(extension, Hash(extension)); |
| if (entry == NULL) { |
| return UNVISITED; |
| } |
| return static_cast<ExtensionTraversalState>( |
| reinterpret_cast<intptr_t>(entry->value)); |
| } |
| |
| void Genesis::ExtensionStates::set_state(RegisteredExtension* extension, |
| ExtensionTraversalState state) { |
| map_.LookupOrInsert(extension, Hash(extension))->value = |
| reinterpret_cast<void*>(static_cast<intptr_t>(state)); |
| } |
| |
| |
| bool Genesis::InstallExtensions(Handle<Context> native_context, |
| v8::ExtensionConfiguration* extensions) { |
| Isolate* isolate = native_context->GetIsolate(); |
| ExtensionStates extension_states; // All extensions have state UNVISITED. |
| return InstallAutoExtensions(isolate, &extension_states) && |
| (!FLAG_expose_free_buffer || |
| InstallExtension(isolate, "v8/free-buffer", &extension_states)) && |
| (!FLAG_expose_gc || |
| InstallExtension(isolate, "v8/gc", &extension_states)) && |
| (!FLAG_expose_externalize_string || |
| InstallExtension(isolate, "v8/externalize", &extension_states)) && |
| (!FLAG_track_gc_object_stats || |
| InstallExtension(isolate, "v8/statistics", &extension_states)) && |
| (!FLAG_expose_trigger_failure || |
| InstallExtension(isolate, "v8/trigger-failure", &extension_states)) && |
| InstallRequestedExtensions(isolate, extensions, &extension_states); |
| } |
| |
| |
| bool Genesis::InstallAutoExtensions(Isolate* isolate, |
| ExtensionStates* extension_states) { |
| for (v8::RegisteredExtension* it = v8::RegisteredExtension::first_extension(); |
| it != NULL; |
| it = it->next()) { |
| if (it->extension()->auto_enable() && |
| !InstallExtension(isolate, it, extension_states)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| |
| bool Genesis::InstallRequestedExtensions(Isolate* isolate, |
| v8::ExtensionConfiguration* extensions, |
| ExtensionStates* extension_states) { |
| for (const char** it = extensions->begin(); it != extensions->end(); ++it) { |
| if (!InstallExtension(isolate, *it, extension_states)) return false; |
| } |
| return true; |
| } |
| |
| |
| // Installs a named extension. This methods is unoptimized and does |
| // not scale well if we want to support a large number of extensions. |
| bool Genesis::InstallExtension(Isolate* isolate, |
| const char* name, |
| ExtensionStates* extension_states) { |
| for (v8::RegisteredExtension* it = v8::RegisteredExtension::first_extension(); |
| it != NULL; |
| it = it->next()) { |
| if (strcmp(name, it->extension()->name()) == 0) { |
| return InstallExtension(isolate, it, extension_states); |
| } |
| } |
| return Utils::ApiCheck(false, |
| "v8::Context::New()", |
| "Cannot find required extension"); |
| } |
| |
| |
| bool Genesis::InstallExtension(Isolate* isolate, |
| v8::RegisteredExtension* current, |
| ExtensionStates* extension_states) { |
| HandleScope scope(isolate); |
| |
| if (extension_states->get_state(current) == INSTALLED) return true; |
| // The current node has already been visited so there must be a |
| // cycle in the dependency graph; fail. |
| if (!Utils::ApiCheck(extension_states->get_state(current) != VISITED, |
| "v8::Context::New()", |
| "Circular extension dependency")) { |
| return false; |
| } |
| DCHECK(extension_states->get_state(current) == UNVISITED); |
| extension_states->set_state(current, VISITED); |
| v8::Extension* extension = current->extension(); |
| // Install the extension's dependencies |
| for (int i = 0; i < extension->dependency_count(); i++) { |
| if (!InstallExtension(isolate, |
| extension->dependencies()[i], |
| extension_states)) { |
| return false; |
| } |
| } |
| // We do not expect this to throw an exception. Change this if it does. |
| bool result = CompileExtension(isolate, extension); |
| DCHECK(isolate->has_pending_exception() != result); |
| if (!result) { |
| // We print out the name of the extension that fail to install. |
| // When an error is thrown during bootstrapping we automatically print |
| // the line number at which this happened to the console in the isolate |
| // error throwing functionality. |
| base::OS::PrintError("Error installing extension '%s'.\n", |
| current->extension()->name()); |
| isolate->clear_pending_exception(); |
| } |
| extension_states->set_state(current, INSTALLED); |
| isolate->NotifyExtensionInstalled(); |
| return result; |
| } |
| |
| |
| bool Genesis::InstallJSBuiltins(Handle<JSBuiltinsObject> builtins) { |
| HandleScope scope(isolate()); |
| for (int i = 0; i < Builtins::NumberOfJavaScriptBuiltins(); i++) { |
| Builtins::JavaScript id = static_cast<Builtins::JavaScript>(i); |
| Handle<Object> function_object = Object::GetProperty( |
| isolate(), builtins, Builtins::GetName(id)).ToHandleChecked(); |
| Handle<JSFunction> function = Handle<JSFunction>::cast(function_object); |
| builtins->set_javascript_builtin(id, *function); |
| } |
| return true; |
| } |
| |
| |
| bool Genesis::ConfigureGlobalObjects( |
| v8::Handle<v8::ObjectTemplate> global_proxy_template) { |
| Handle<JSObject> global_proxy( |
| JSObject::cast(native_context()->global_proxy())); |
| Handle<JSObject> global_object( |
| JSObject::cast(native_context()->global_object())); |
| |
| if (!global_proxy_template.IsEmpty()) { |
| // Configure the global proxy object. |
| Handle<ObjectTemplateInfo> global_proxy_data = |
| v8::Utils::OpenHandle(*global_proxy_template); |
| if (!ConfigureApiObject(global_proxy, global_proxy_data)) return false; |
| |
| // Configure the global object. |
| Handle<FunctionTemplateInfo> proxy_constructor( |
| FunctionTemplateInfo::cast(global_proxy_data->constructor())); |
| if (!proxy_constructor->prototype_template()->IsUndefined()) { |
| Handle<ObjectTemplateInfo> global_object_data( |
| ObjectTemplateInfo::cast(proxy_constructor->prototype_template())); |
| if (!ConfigureApiObject(global_object, global_object_data)) return false; |
| } |
| } |
| |
| SetObjectPrototype(global_proxy, global_object); |
| |
| native_context()->set_initial_array_prototype( |
| JSArray::cast(native_context()->array_function()->prototype())); |
| native_context()->set_array_buffer_map( |
| native_context()->array_buffer_fun()->initial_map()); |
| |
| return true; |
| } |
| |
| |
| bool Genesis::ConfigureApiObject(Handle<JSObject> object, |
| Handle<ObjectTemplateInfo> object_template) { |
| DCHECK(!object_template.is_null()); |
| DCHECK(FunctionTemplateInfo::cast(object_template->constructor()) |
| ->IsTemplateFor(object->map()));; |
| |
| MaybeHandle<JSObject> maybe_obj = |
| ApiNatives::InstantiateObject(object_template); |
| Handle<JSObject> obj; |
| if (!maybe_obj.ToHandle(&obj)) { |
| DCHECK(isolate()->has_pending_exception()); |
| isolate()->clear_pending_exception(); |
| return false; |
| } |
| TransferObject(obj, object); |
| return true; |
| } |
| |
| |
| void Genesis::TransferNamedProperties(Handle<JSObject> from, |
| Handle<JSObject> to) { |
| // If JSObject::AddProperty asserts due to already existing property, |
| // it is likely due to both global objects sharing property name(s). |
| // Merging those two global objects is impossible. |
| // The global template must not create properties that already exist |
| // in the snapshotted global object. |
| if (from->HasFastProperties()) { |
| Handle<DescriptorArray> descs = |
| Handle<DescriptorArray>(from->map()->instance_descriptors()); |
| for (int i = 0; i < from->map()->NumberOfOwnDescriptors(); i++) { |
| PropertyDetails details = descs->GetDetails(i); |
| switch (details.type()) { |
| case DATA: { |
| HandleScope inner(isolate()); |
| Handle<Name> key = Handle<Name>(descs->GetKey(i)); |
| FieldIndex index = FieldIndex::ForDescriptor(from->map(), i); |
| DCHECK(!descs->GetDetails(i).representation().IsDouble()); |
| Handle<Object> value = Handle<Object>(from->RawFastPropertyAt(index), |
| isolate()); |
| JSObject::AddProperty(to, key, value, details.attributes()); |
| break; |
| } |
| case DATA_CONSTANT: { |
| HandleScope inner(isolate()); |
| Handle<Name> key = Handle<Name>(descs->GetKey(i)); |
| Handle<Object> constant(descs->GetConstant(i), isolate()); |
| JSObject::AddProperty(to, key, constant, details.attributes()); |
| break; |
| } |
| case ACCESSOR: |
| UNREACHABLE(); |
| case ACCESSOR_CONSTANT: { |
| Handle<Name> key(descs->GetKey(i)); |
| LookupIterator it(to, key, LookupIterator::OWN_SKIP_INTERCEPTOR); |
| CHECK_NE(LookupIterator::ACCESS_CHECK, it.state()); |
| // If the property is already there we skip it |
| if (it.IsFound()) continue; |
| HandleScope inner(isolate()); |
| DCHECK(!to->HasFastProperties()); |
| // Add to dictionary. |
| Handle<Object> callbacks(descs->GetCallbacksObject(i), isolate()); |
| PropertyDetails d(details.attributes(), ACCESSOR_CONSTANT, i + 1, |
| PropertyCellType::kMutable); |
| JSObject::SetNormalizedProperty(to, key, callbacks, d); |
| break; |
| } |
| } |
| } |
| } else if (from->IsGlobalObject()) { |
| Handle<GlobalDictionary> properties = |
| Handle<GlobalDictionary>(from->global_dictionary()); |
| int capacity = properties->Capacity(); |
| for (int i = 0; i < capacity; i++) { |
| Object* raw_key(properties->KeyAt(i)); |
| if (properties->IsKey(raw_key)) { |
| DCHECK(raw_key->IsName()); |
| // If the property is already there we skip it. |
| Handle<Name> key(Name::cast(raw_key)); |
| LookupIterator it(to, key, LookupIterator::OWN_SKIP_INTERCEPTOR); |
| CHECK_NE(LookupIterator::ACCESS_CHECK, it.state()); |
| if (it.IsFound()) continue; |
| // Set the property. |
| Handle<Object> value = |
| Handle<Object>(properties->ValueAt(i), isolate()); |
| DCHECK(value->IsPropertyCell()); |
| value = handle(PropertyCell::cast(*value)->value(), isolate()); |
| if (value->IsTheHole()) continue; |
| PropertyDetails details = properties->DetailsAt(i); |
| DCHECK_EQ(kData, details.kind()); |
| JSObject::AddProperty(to, key, value, details.attributes()); |
| } |
| } |
| } else { |
| Handle<NameDictionary> properties = |
| Handle<NameDictionary>(from->property_dictionary()); |
| int capacity = properties->Capacity(); |
| for (int i = 0; i < capacity; i++) { |
| Object* raw_key(properties->KeyAt(i)); |
| if (properties->IsKey(raw_key)) { |
| DCHECK(raw_key->IsName()); |
| // If the property is already there we skip it. |
| Handle<Name> key(Name::cast(raw_key)); |
| LookupIterator it(to, key, LookupIterator::OWN_SKIP_INTERCEPTOR); |
| CHECK_NE(LookupIterator::ACCESS_CHECK, it.state()); |
| if (it.IsFound()) continue; |
| // Set the property. |
| Handle<Object> value = Handle<Object>(properties->ValueAt(i), |
| isolate()); |
| DCHECK(!value->IsCell()); |
| DCHECK(!value->IsTheHole()); |
| PropertyDetails details = properties->DetailsAt(i); |
| DCHECK_EQ(kData, details.kind()); |
| JSObject::AddProperty(to, key, value, details.attributes()); |
| } |
| } |
| } |
| } |
| |
| |
| void Genesis::TransferIndexedProperties(Handle<JSObject> from, |
| Handle<JSObject> to) { |
| // Cloning the elements array is sufficient. |
| Handle<FixedArray> from_elements = |
| Handle<FixedArray>(FixedArray::cast(from->elements())); |
| Handle<FixedArray> to_elements = factory()->CopyFixedArray(from_elements); |
| to->set_elements(*to_elements); |
| } |
| |
| |
| void Genesis::TransferObject(Handle<JSObject> from, Handle<JSObject> to) { |
| HandleScope outer(isolate()); |
| |
| DCHECK(!from->IsJSArray()); |
| DCHECK(!to->IsJSArray()); |
| |
| TransferNamedProperties(from, to); |
| TransferIndexedProperties(from, to); |
| |
| // Transfer the prototype (new map is needed). |
| Handle<Object> proto(from->map()->prototype(), isolate()); |
| SetObjectPrototype(to, proto); |
| } |
| |
| |
| void Genesis::MakeFunctionInstancePrototypeWritable() { |
| // The maps with writable prototype are created in CreateEmptyFunction |
| // and CreateStrictModeFunctionMaps respectively. Initially the maps are |
| // created with read-only prototype for JS builtins processing. |
| DCHECK(!sloppy_function_map_writable_prototype_.is_null()); |
| DCHECK(!strict_function_map_writable_prototype_.is_null()); |
| |
| // Replace function instance maps to make prototype writable. |
| native_context()->set_sloppy_function_map( |
| *sloppy_function_map_writable_prototype_); |
| native_context()->set_strict_function_map( |
| *strict_function_map_writable_prototype_); |
| } |
| |
| |
| class NoTrackDoubleFieldsForSerializerScope { |
| public: |
| explicit NoTrackDoubleFieldsForSerializerScope(Isolate* isolate) |
| : flag_(FLAG_track_double_fields), enabled_(false) { |
| if (isolate->serializer_enabled()) { |
| // Disable tracking double fields because heap numbers treated as |
| // immutable by the serializer. |
| FLAG_track_double_fields = false; |
| enabled_ = true; |
| } |
| } |
| |
| ~NoTrackDoubleFieldsForSerializerScope() { |
| if (enabled_) { |
| FLAG_track_double_fields = flag_; |
| } |
| } |
| |
| private: |
| bool flag_; |
| bool enabled_; |
| }; |
| |
| |
| Genesis::Genesis(Isolate* isolate, |
| MaybeHandle<JSGlobalProxy> maybe_global_proxy, |
| v8::Handle<v8::ObjectTemplate> global_proxy_template, |
| v8::ExtensionConfiguration* extensions) |
| : isolate_(isolate), |
| active_(isolate->bootstrapper()) { |
| NoTrackDoubleFieldsForSerializerScope disable_scope(isolate); |
| result_ = Handle<Context>::null(); |
| // Before creating the roots we must save the context and restore it |
| // on all function exits. |
| SaveContext saved_context(isolate); |
| |
| // During genesis, the boilerplate for stack overflow won't work until the |
| // environment has been at least partially initialized. Add a stack check |
| // before entering JS code to catch overflow early. |
| StackLimitCheck check(isolate); |
| if (check.HasOverflowed()) { |
| isolate->StackOverflow(); |
| return; |
| } |
| |
| // The deserializer needs to hook up references to the global proxy. |
| // Create an uninitialized global proxy now if we don't have one |
| // and initialize it later in CreateNewGlobals. |
| Handle<JSGlobalProxy> global_proxy; |
| if (!maybe_global_proxy.ToHandle(&global_proxy)) { |
| global_proxy = isolate->factory()->NewUninitializedJSGlobalProxy(); |
| } |
| |
| // We can only de-serialize a context if the isolate was initialized from |
| // a snapshot. Otherwise we have to build the context from scratch. |
| // Also create a context from scratch to expose natives, if required by flag. |
| Handle<FixedArray> outdated_contexts; |
| if (!isolate->initialized_from_snapshot() || |
| !Snapshot::NewContextFromSnapshot(isolate, global_proxy, |
| &outdated_contexts) |
| .ToHandle(&native_context_)) { |
| native_context_ = Handle<Context>(); |
| } |
| |
| if (!native_context().is_null()) { |
| AddToWeakNativeContextList(*native_context()); |
| isolate->set_context(*native_context()); |
| isolate->counters()->contexts_created_by_snapshot()->Increment(); |
| #if TRACE_MAPS |
| if (FLAG_trace_maps) { |
| Handle<JSFunction> object_fun = isolate->object_function(); |
| PrintF("[TraceMap: InitialMap map= %p SFI= %d_Object ]\n", |
| reinterpret_cast<void*>(object_fun->initial_map()), |
| object_fun->shared()->unique_id()); |
| Map::TraceAllTransitions(object_fun->initial_map()); |
| } |
| #endif |
| Handle<GlobalObject> global_object = |
| CreateNewGlobals(global_proxy_template, global_proxy); |
| |
| HookUpGlobalProxy(global_object, global_proxy); |
| HookUpGlobalObject(global_object, outdated_contexts); |
| native_context()->builtins()->set_global_proxy( |
| native_context()->global_proxy()); |
| |
| if (!ConfigureGlobalObjects(global_proxy_template)) return; |
| } else { |
| // We get here if there was no context snapshot. |
| CreateRoots(); |
| Handle<JSFunction> empty_function = CreateEmptyFunction(isolate); |
| CreateStrictModeFunctionMaps(empty_function); |
| CreateStrongModeFunctionMaps(empty_function); |
| Handle<GlobalObject> global_object = |
| CreateNewGlobals(global_proxy_template, global_proxy); |
| HookUpGlobalProxy(global_object, global_proxy); |
| InitializeGlobal(global_object, empty_function); |
| InstallJSFunctionResultCaches(); |
| InitializeNormalizedMapCaches(); |
| if (!InstallNatives()) return; |
| |
| MakeFunctionInstancePrototypeWritable(); |
| |
| if (!ConfigureGlobalObjects(global_proxy_template)) return; |
| isolate->counters()->contexts_created_from_scratch()->Increment(); |
| } |
| |
| // Install experimental and extra natives. Do not include them into the |
| // snapshot as we should be able to turn them off at runtime. Re-installing |
| // them after they have already been deserialized would also fail. |
| if (!isolate->serializer_enabled()) { |
| InitializeExperimentalGlobal(); |
| if (!InstallExperimentalNatives()) return; |
| if (!InstallExtraNatives()) return; |
| } |
| |
| // The serializer cannot serialize typed arrays. Reset those typed arrays |
| // for each new context. |
| InitializeBuiltinTypedArrays(); |
| |
| result_ = native_context(); |
| } |
| |
| |
| // Support for thread preemption. |
| |
| // Reserve space for statics needing saving and restoring. |
| int Bootstrapper::ArchiveSpacePerThread() { |
| return sizeof(NestingCounterType); |
| } |
| |
| |
| // Archive statics that are thread-local. |
| char* Bootstrapper::ArchiveState(char* to) { |
| *reinterpret_cast<NestingCounterType*>(to) = nesting_; |
| nesting_ = 0; |
| return to + sizeof(NestingCounterType); |
| } |
| |
| |
| // Restore statics that are thread-local. |
| char* Bootstrapper::RestoreState(char* from) { |
| nesting_ = *reinterpret_cast<NestingCounterType*>(from); |
| return from + sizeof(NestingCounterType); |
| } |
| |
| |
| // Called when the top-level V8 mutex is destroyed. |
| void Bootstrapper::FreeThreadResources() { |
| DCHECK(!IsActive()); |
| } |
| |
| } } // namespace v8::internal |