| // 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/isolate-inl.h" |
| #include "src/natives.h" |
| #include "src/snapshot.h" |
| #include "src/trig-table.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/code-stubs.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| NativesExternalStringResource::NativesExternalStringResource( |
| Bootstrapper* bootstrapper, |
| const char* source, |
| size_t length) |
| : data_(source), length_(length) { |
| if (bootstrapper->delete_these_non_arrays_on_tear_down_ == NULL) { |
| bootstrapper->delete_these_non_arrays_on_tear_down_ = new List<char*>(2); |
| } |
| // The resources are small objects and we only make a fixed number of |
| // them, but let's clean them up on exit for neatness. |
| bootstrapper->delete_these_non_arrays_on_tear_down_-> |
| Add(reinterpret_cast<char*>(this)); |
| } |
| |
| |
| Bootstrapper::Bootstrapper(Isolate* isolate) |
| : isolate_(isolate), |
| nesting_(0), |
| extensions_cache_(Script::TYPE_EXTENSION), |
| delete_these_non_arrays_on_tear_down_(NULL), |
| delete_these_arrays_on_tear_down_(NULL) { |
| } |
| |
| |
| Handle<String> Bootstrapper::NativesSourceLookup(int index) { |
| ASSERT(0 <= index && index < Natives::GetBuiltinsCount()); |
| Heap* heap = isolate_->heap(); |
| if (heap->natives_source_cache()->get(index)->IsUndefined()) { |
| // We can use external strings for the natives. |
| Vector<const char> source = Natives::GetRawScriptSource(index); |
| NativesExternalStringResource* resource = |
| new NativesExternalStringResource(this, |
| source.start(), |
| source.length()); |
| // We do not expect this to throw an exception. Change this if it does. |
| Handle<String> source_code = |
| isolate_->factory()->NewExternalStringFromAscii( |
| resource).ToHandleChecked(); |
| heap->natives_source_cache()->set(index, *source_code); |
| } |
| Handle<Object> cached_source(heap->natives_source_cache()->get(index), |
| isolate_); |
| return Handle<String>::cast(cached_source); |
| } |
| |
| |
| 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_; |
| delete gc_extension_; |
| delete externalize_string_extension_; |
| delete statistics_extension_; |
| delete trigger_failure_extension_; |
| } |
| |
| |
| char* Bootstrapper::AllocateAutoDeletedArray(int bytes) { |
| char* memory = new char[bytes]; |
| if (memory != NULL) { |
| if (delete_these_arrays_on_tear_down_ == NULL) { |
| delete_these_arrays_on_tear_down_ = new List<char*>(2); |
| } |
| delete_these_arrays_on_tear_down_->Add(memory); |
| } |
| return memory; |
| } |
| |
| |
| void Bootstrapper::TearDown() { |
| if (delete_these_non_arrays_on_tear_down_ != NULL) { |
| int len = delete_these_non_arrays_on_tear_down_->length(); |
| ASSERT(len < 24); // Don't use this mechanism for unbounded allocations. |
| for (int i = 0; i < len; i++) { |
| delete delete_these_non_arrays_on_tear_down_->at(i); |
| delete_these_non_arrays_on_tear_down_->at(i) = NULL; |
| } |
| delete delete_these_non_arrays_on_tear_down_; |
| delete_these_non_arrays_on_tear_down_ = NULL; |
| } |
| |
| if (delete_these_arrays_on_tear_down_ != NULL) { |
| int len = delete_these_arrays_on_tear_down_->length(); |
| ASSERT(len < 1000); // Don't use this mechanism for unbounded allocations. |
| for (int i = 0; i < len; i++) { |
| delete[] delete_these_arrays_on_tear_down_->at(i); |
| delete_these_arrays_on_tear_down_->at(i) = NULL; |
| } |
| delete delete_these_arrays_on_tear_down_; |
| delete_these_arrays_on_tear_down_ = NULL; |
| } |
| |
| extensions_cache_.Initialize(isolate_, false); // Yes, symmetrical |
| } |
| |
| |
| class Genesis BASE_EMBEDDED { |
| public: |
| Genesis(Isolate* isolate, |
| Handle<Object> global_object, |
| v8::Handle<v8::ObjectTemplate> global_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> GetStrictPoisonFunction(); |
| // Poison for sloppy generator function arguments/callee. |
| Handle<JSFunction> GetGeneratorPoisonFunction(); |
| |
| void CreateStrictModeFunctionMaps(Handle<JSFunction> empty); |
| |
| // Make the "arguments" and "caller" properties throw a TypeError on access. |
| void PoisonArgumentsAndCaller(Handle<Map> map); |
| |
| // Creates the global objects using the global 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<JSGlobalProxy> CreateNewGlobals( |
| v8::Handle<v8::ObjectTemplate> global_template, |
| Handle<Object> global_object, |
| Handle<GlobalObject>* global_proxy_out); |
| // 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> inner_global, |
| Handle<JSGlobalProxy> global_proxy); |
| // Similarly, we want to use the inner global that has been created by the |
| // templates passed through the API. The inner global from the snapshot is |
| // detached from the other objects in the snapshot. |
| void HookUpInnerGlobal(Handle<GlobalObject> inner_global); |
| // New context initialization. Used for creating a context from scratch. |
| void InitializeGlobal(Handle<GlobalObject> inner_global, |
| 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 InstallExperimentalBuiltinFunctionIds(); |
| void InstallExperimentalNativeFunctions(); |
| Handle<JSFunction> InstallInternalArray(Handle<JSBuiltinsObject> builtins, |
| 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(); |
| 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_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> CreateFunctionMap(FunctionMode function_mode); |
| |
| void SetFunctionInstanceDescriptor(Handle<Map> map, |
| FunctionMode function_mode); |
| void MakeFunctionInstancePrototypeWritable(); |
| |
| Handle<Map> CreateStrictFunctionMap( |
| FunctionMode function_mode, |
| Handle<JSFunction> empty_function); |
| |
| void SetStrictFunctionInstanceDescriptor(Handle<Map> map, |
| FunctionMode function_mode); |
| |
| static bool CompileBuiltin(Isolate* isolate, int index); |
| static bool CompileExperimentalBuiltin(Isolate* isolate, int index); |
| static bool CompileNative(Isolate* isolate, |
| Vector<const char> name, |
| Handle<String> source); |
| static bool CompileScriptCached(Isolate* isolate, |
| Vector<const char> name, |
| Handle<String> source, |
| SourceCodeCache* cache, |
| v8::Extension* extension, |
| Handle<Context> top_context, |
| bool use_runtime_context); |
| |
| 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> generator_poison_function; |
| |
| BootstrapperActive active_; |
| friend class Bootstrapper; |
| }; |
| |
| |
| void Bootstrapper::Iterate(ObjectVisitor* v) { |
| extensions_cache_.Iterate(v); |
| v->Synchronize(VisitorSynchronization::kExtensions); |
| } |
| |
| |
| Handle<Context> Bootstrapper::CreateEnvironment( |
| Handle<Object> global_object, |
| v8::Handle<v8::ObjectTemplate> global_template, |
| v8::ExtensionConfiguration* extensions) { |
| HandleScope scope(isolate_); |
| Genesis genesis(isolate_, global_object, global_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_to_map = Handle<Map>(object->map()); |
| Handle<Map> new_to_map = Map::Copy(old_to_map); |
| new_to_map->set_prototype(*proto); |
| object->set_map(*new_to_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()); |
| } |
| |
| |
| static Handle<JSFunction> InstallFunction(Handle<JSObject> target, |
| const char* name, |
| InstanceType type, |
| int instance_size, |
| MaybeHandle<JSObject> maybe_prototype, |
| Builtins::Name call) { |
| 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; |
| Handle<JSFunction> function = maybe_prototype.ToHandle(&prototype) |
| ? factory->NewFunction(internalized_name, call_code, prototype, |
| type, instance_size) |
| : factory->NewFunctionWithoutPrototype(internalized_name, call_code); |
| PropertyAttributes attributes; |
| if (target->IsJSBuiltinsObject()) { |
| attributes = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| } else { |
| attributes = DONT_ENUM; |
| } |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| target, internalized_name, function, attributes).Check(); |
| 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 attribs = static_cast<PropertyAttributes>( |
| DONT_ENUM | DONT_DELETE | READ_ONLY); |
| |
| Handle<AccessorInfo> length = |
| Accessors::FunctionLengthInfo(isolate(), attribs); |
| { // Add length. |
| CallbacksDescriptor d(Handle<Name>(Name::cast(length->name())), |
| length, attribs); |
| map->AppendDescriptor(&d); |
| } |
| Handle<AccessorInfo> name = |
| Accessors::FunctionNameInfo(isolate(), attribs); |
| { // Add name. |
| CallbacksDescriptor d(Handle<Name>(Name::cast(name->name())), |
| name, attribs); |
| map->AppendDescriptor(&d); |
| } |
| Handle<AccessorInfo> args = |
| Accessors::FunctionArgumentsInfo(isolate(), attribs); |
| { // Add arguments. |
| CallbacksDescriptor d(Handle<Name>(Name::cast(args->name())), |
| args, attribs); |
| map->AppendDescriptor(&d); |
| } |
| Handle<AccessorInfo> caller = |
| Accessors::FunctionCallerInfo(isolate(), attribs); |
| { // Add caller. |
| CallbacksDescriptor d(Handle<Name>(Name::cast(caller->name())), |
| caller, attribs); |
| map->AppendDescriptor(&d); |
| } |
| if (IsFunctionModeWithPrototype(function_mode)) { |
| if (function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE) { |
| attribs = static_cast<PropertyAttributes>(attribs & ~READ_ONLY); |
| } |
| Handle<AccessorInfo> prototype = |
| Accessors::FunctionPrototypeInfo(isolate(), attribs); |
| CallbacksDescriptor d(Handle<Name>(Name::cast(prototype->name())), |
| prototype, attribs); |
| map->AppendDescriptor(&d); |
| } |
| } |
| |
| |
| Handle<Map> Genesis::CreateFunctionMap(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 = |
| CreateFunctionMap(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 = |
| CreateFunctionMap(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_ = |
| CreateFunctionMap(FUNCTION_WITH_WRITEABLE_PROTOTYPE); |
| |
| Factory* factory = isolate->factory(); |
| |
| Handle<String> object_name = factory->Object_string(); |
| |
| { // --- O b j e c t --- |
| Handle<JSFunction> object_fun = factory->NewFunction(object_name); |
| Handle<Map> object_function_map = |
| factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize); |
| object_fun->set_initial_map(*object_function_map); |
| object_function_map->set_constructor(*object_fun); |
| object_function_map->set_unused_property_fields( |
| JSObject::kInitialGlobalObjectUnusedPropertiesCount); |
| |
| native_context()->set_object_function(*object_fun); |
| |
| // Allocate a new prototype for the object function. |
| Handle<JSObject> prototype = factory->NewJSObject( |
| isolate->object_function(), |
| TENURED); |
| |
| native_context()->set_initial_object_prototype(*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(*prototype); |
| Accessors::FunctionSetPrototype(object_fun, prototype); |
| } |
| |
| // Allocate the empty function as the prototype for function ECMAScript |
| // 262 15.3.4. |
| Handle<String> empty_string = |
| factory->InternalizeOneByteString(STATIC_ASCII_VECTOR("Empty")); |
| Handle<Code> code(isolate->builtins()->builtin(Builtins::kEmptyFunction)); |
| Handle<JSFunction> empty_function = factory->NewFunctionWithoutPrototype( |
| empty_string, code); |
| |
| // --- E m p t y --- |
| Handle<String> source = factory->NewStringFromStaticAscii("() {}"); |
| 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. |
| native_context()->sloppy_function_map()->set_prototype(*empty_function); |
| native_context()->sloppy_function_without_prototype_map()-> |
| set_prototype(*empty_function); |
| sloppy_function_map_writable_prototype_->set_prototype(*empty_function); |
| |
| // Allocate the function map first and then patch the prototype later |
| Handle<Map> empty_function_map = |
| CreateFunctionMap(FUNCTION_WITHOUT_PROTOTYPE); |
| empty_function_map->set_prototype( |
| native_context()->object_function()->prototype()); |
| empty_function->set_map(*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); |
| |
| Handle<AccessorPair> arguments(factory()->NewAccessorPair()); |
| Handle<AccessorPair> caller(factory()->NewAccessorPair()); |
| PropertyAttributes rw_attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE); |
| PropertyAttributes ro_attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| |
| // Add length. |
| if (function_mode == BOUND_FUNCTION) { |
| Handle<String> length_string = isolate()->factory()->length_string(); |
| FieldDescriptor d(length_string, 0, ro_attribs, Representation::Tagged()); |
| map->AppendDescriptor(&d); |
| } else { |
| ASSERT(function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE || |
| function_mode == FUNCTION_WITH_READONLY_PROTOTYPE || |
| function_mode == FUNCTION_WITHOUT_PROTOTYPE); |
| Handle<AccessorInfo> length = |
| Accessors::FunctionLengthInfo(isolate(), ro_attribs); |
| CallbacksDescriptor d(Handle<Name>(Name::cast(length->name())), |
| length, ro_attribs); |
| map->AppendDescriptor(&d); |
| } |
| Handle<AccessorInfo> name = |
| Accessors::FunctionNameInfo(isolate(), ro_attribs); |
| { // Add name. |
| CallbacksDescriptor d(Handle<Name>(Name::cast(name->name())), |
| name, ro_attribs); |
| map->AppendDescriptor(&d); |
| } |
| { // Add arguments. |
| CallbacksDescriptor d(factory()->arguments_string(), arguments, |
| rw_attribs); |
| map->AppendDescriptor(&d); |
| } |
| { // Add caller. |
| CallbacksDescriptor d(factory()->caller_string(), caller, rw_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); |
| CallbacksDescriptor d(Handle<Name>(Name::cast(prototype->name())), |
| prototype, attribs); |
| map->AppendDescriptor(&d); |
| } |
| } |
| |
| |
| // ECMAScript 5th Edition, 13.2.3 |
| Handle<JSFunction> Genesis::GetStrictPoisonFunction() { |
| if (strict_poison_function.is_null()) { |
| Handle<String> name = factory()->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("ThrowTypeError")); |
| Handle<Code> code(isolate()->builtins()->builtin( |
| Builtins::kStrictModePoisonPill)); |
| strict_poison_function = factory()->NewFunctionWithoutPrototype(name, code); |
| strict_poison_function->set_map(native_context()->sloppy_function_map()); |
| strict_poison_function->shared()->DontAdaptArguments(); |
| |
| JSObject::PreventExtensions(strict_poison_function).Assert(); |
| } |
| return strict_poison_function; |
| } |
| |
| |
| Handle<JSFunction> Genesis::GetGeneratorPoisonFunction() { |
| if (generator_poison_function.is_null()) { |
| Handle<String> name = factory()->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("ThrowTypeError")); |
| Handle<Code> code(isolate()->builtins()->builtin( |
| Builtins::kGeneratorPoisonPill)); |
| generator_poison_function = factory()->NewFunctionWithoutPrototype( |
| name, code); |
| generator_poison_function->set_map(native_context()->sloppy_function_map()); |
| generator_poison_function->shared()->DontAdaptArguments(); |
| |
| JSObject::PreventExtensions(generator_poison_function).Assert(); |
| } |
| return generator_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->set_prototype(*empty_function); |
| 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); |
| |
| // Complete the callbacks. |
| PoisonArgumentsAndCaller(strict_function_without_prototype_map); |
| PoisonArgumentsAndCaller(strict_function_map); |
| PoisonArgumentsAndCaller(strict_function_map_writable_prototype_); |
| PoisonArgumentsAndCaller(bound_function_map); |
| } |
| |
| |
| static void SetAccessors(Handle<Map> map, |
| Handle<String> name, |
| Handle<JSFunction> func) { |
| DescriptorArray* descs = map->instance_descriptors(); |
| int number = descs->SearchWithCache(*name, *map); |
| AccessorPair* accessors = AccessorPair::cast(descs->GetValue(number)); |
| accessors->set_getter(*func); |
| accessors->set_setter(*func); |
| } |
| |
| |
| 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); |
| CallbacksDescriptor descriptor(name, accessor_pair, attributes); |
| descriptors->Replace(idx, &descriptor); |
| } |
| |
| |
| void Genesis::PoisonArgumentsAndCaller(Handle<Map> map) { |
| SetAccessors(map, factory()->arguments_string(), GetStrictPoisonFunction()); |
| SetAccessors(map, factory()->caller_string(), GetStrictPoisonFunction()); |
| } |
| |
| |
| static void AddToWeakNativeContextList(Context* context) { |
| ASSERT(context->IsNativeContext()); |
| Heap* heap = context->GetIsolate()->heap(); |
| #ifdef DEBUG |
| { // NOLINT |
| ASSERT(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)) { |
| ASSERT(current != context); |
| } |
| } |
| #endif |
| context->set(Context::NEXT_CONTEXT_LINK, heap->native_contexts_list()); |
| 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<JSGlobalProxy> Genesis::CreateNewGlobals( |
| v8::Handle<v8::ObjectTemplate> global_template, |
| Handle<Object> global_object, |
| Handle<GlobalObject>* inner_global_out) { |
| // The argument global_template aka data is an ObjectTemplateInfo. |
| // It has a constructor pointer that points at global_constructor which is a |
| // FunctionTemplateInfo. |
| // The global_constructor is used to create or reinitialize the global_proxy. |
| // The global_constructor also has a prototype_template pointer that points at |
| // js_global_template which is an ObjectTemplateInfo. |
| // That in turn has a constructor pointer that points at |
| // js_global_constructor which is a FunctionTemplateInfo. |
| // js_global_constructor is used to make js_global_function |
| // js_global_function is used to make the new inner_global. |
| // |
| // --- G l o b a l --- |
| // Step 1: Create a fresh inner JSGlobalObject. |
| Handle<JSFunction> js_global_function; |
| Handle<ObjectTemplateInfo> js_global_template; |
| if (!global_template.IsEmpty()) { |
| // Get prototype template of the global_template. |
| Handle<ObjectTemplateInfo> data = |
| v8::Utils::OpenHandle(*global_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_template = |
| Handle<ObjectTemplateInfo>::cast(proto_template); |
| } |
| } |
| |
| if (js_global_template.is_null()) { |
| Handle<String> name = Handle<String>(heap()->empty_string()); |
| Handle<Code> code = Handle<Code>(isolate()->builtins()->builtin( |
| Builtins::kIllegal)); |
| js_global_function = factory()->NewFunction( |
| name, code, JS_GLOBAL_OBJECT_TYPE, JSGlobalObject::kSize); |
| // Change the constructor property of the prototype of the |
| // hidden global function to refer to the Object function. |
| Handle<JSObject> prototype = |
| Handle<JSObject>( |
| JSObject::cast(js_global_function->instance_prototype())); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| prototype, factory()->constructor_string(), |
| isolate()->object_function(), NONE).Check(); |
| } else { |
| Handle<FunctionTemplateInfo> js_global_constructor( |
| FunctionTemplateInfo::cast(js_global_template->constructor())); |
| js_global_function = |
| factory()->CreateApiFunction(js_global_constructor, |
| factory()->the_hole_value(), |
| factory()->InnerGlobalObject); |
| } |
| |
| js_global_function->initial_map()->set_is_hidden_prototype(); |
| js_global_function->initial_map()->set_dictionary_map(true); |
| Handle<GlobalObject> inner_global = |
| factory()->NewGlobalObject(js_global_function); |
| if (inner_global_out != NULL) { |
| *inner_global_out = inner_global; |
| } |
| |
| // Step 2: create or re-initialize the global proxy object. |
| Handle<JSFunction> global_proxy_function; |
| if (global_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_template); |
| Handle<FunctionTemplateInfo> global_constructor( |
| FunctionTemplateInfo::cast(data->constructor())); |
| global_proxy_function = |
| factory()->CreateApiFunction(global_constructor, |
| factory()->the_hole_value(), |
| factory()->OuterGlobalObject); |
| } |
| |
| Handle<String> global_name = factory()->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("global")); |
| 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. |
| |
| Handle<JSGlobalProxy> global_proxy; |
| if (global_object.location() != NULL) { |
| ASSERT(global_object->IsJSGlobalProxy()); |
| global_proxy = Handle<JSGlobalProxy>::cast(global_object); |
| factory()->ReinitializeJSGlobalProxy(global_proxy, global_proxy_function); |
| } else { |
| global_proxy = Handle<JSGlobalProxy>::cast( |
| factory()->NewJSObject(global_proxy_function, TENURED)); |
| global_proxy->set_hash(heap()->undefined_value()); |
| } |
| return global_proxy; |
| } |
| |
| |
| void Genesis::HookUpGlobalProxy(Handle<GlobalObject> inner_global, |
| Handle<JSGlobalProxy> global_proxy) { |
| // Set the native context for the global object. |
| inner_global->set_native_context(*native_context()); |
| inner_global->set_global_context(*native_context()); |
| inner_global->set_global_receiver(*global_proxy); |
| global_proxy->set_native_context(*native_context()); |
| native_context()->set_global_proxy(*global_proxy); |
| } |
| |
| |
| void Genesis::HookUpInnerGlobal(Handle<GlobalObject> inner_global) { |
| Handle<GlobalObject> inner_global_from_snapshot( |
| GlobalObject::cast(native_context()->extension())); |
| Handle<JSBuiltinsObject> builtins_global(native_context()->builtins()); |
| native_context()->set_extension(*inner_global); |
| native_context()->set_global_object(*inner_global); |
| native_context()->set_security_token(*inner_global); |
| static const PropertyAttributes attributes = |
| static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE); |
| Runtime::ForceSetObjectProperty(builtins_global, |
| factory()->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("global")), |
| inner_global, |
| attributes).Assert(); |
| // Set up the reference from the global object to the builtins object. |
| JSGlobalObject::cast(*inner_global)->set_builtins(*builtins_global); |
| TransferNamedProperties(inner_global_from_snapshot, inner_global); |
| TransferIndexedProperties(inner_global_from_snapshot, inner_global); |
| } |
| |
| |
| // This is only called if we are not using snapshots. The equivalent |
| // work in the snapshot case is done in HookUpInnerGlobal. |
| void Genesis::InitializeGlobal(Handle<GlobalObject> inner_global, |
| 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(*inner_global); |
| native_context()->set_global_object(*inner_global); |
| // Security setup: Set the security token of the global object to |
| // its the inner global. This makes the security check between two |
| // different contexts fail by default even in case of global |
| // object reinitialization. |
| native_context()->set_security_token(*inner_global); |
| |
| Isolate* isolate = inner_global->GetIsolate(); |
| Factory* factory = isolate->factory(); |
| Heap* heap = isolate->heap(); |
| |
| Handle<String> object_name = factory->Object_string(); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| inner_global, object_name, |
| isolate->object_function(), DONT_ENUM).Check(); |
| |
| 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() |
| ASSERT(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. |
| CallbacksDescriptor d( |
| Handle<Name>(Name::cast(array_length->name())), |
| array_length, attribs); |
| array_function->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); |
| } |
| |
| { // --- 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. |
| CallbacksDescriptor d(factory->length_string(), string_length, attribs); |
| string_map->AppendDescriptor(&d); |
| } |
| } |
| |
| { // --- 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); |
| |
| ASSERT(regexp_fun->has_initial_map()); |
| Handle<Map> initial_map(regexp_fun->initial_map()); |
| |
| ASSERT_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. |
| FieldDescriptor field(factory->source_string(), |
| JSRegExp::kSourceFieldIndex, |
| final, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&field); |
| } |
| { |
| // ECMA-262, section 15.10.7.2. |
| FieldDescriptor field(factory->global_string(), |
| JSRegExp::kGlobalFieldIndex, |
| final, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&field); |
| } |
| { |
| // ECMA-262, section 15.10.7.3. |
| FieldDescriptor field(factory->ignore_case_string(), |
| JSRegExp::kIgnoreCaseFieldIndex, |
| final, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&field); |
| } |
| { |
| // ECMA-262, section 15.10.7.4. |
| FieldDescriptor 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); |
| FieldDescriptor field(factory->last_index_string(), |
| JSRegExp::kLastIndexFieldIndex, |
| writable, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&field); |
| } |
| |
| initial_map->set_inobject_properties(5); |
| initial_map->set_pre_allocated_property_fields(5); |
| initial_map->set_unused_property_fields(0); |
| initial_map->set_instance_size( |
| initial_map->instance_size() + 5 * kPointerSize); |
| initial_map->set_visitor_id(StaticVisitorBase::GetVisitorId(*initial_map)); |
| |
| // RegExp prototype object is itself a RegExp. |
| Handle<Map> proto_map = Map::Copy(initial_map); |
| proto_map->set_prototype(native_context()->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. |
| initial_map->set_prototype(*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); |
| ASSERT(json_object->IsJSObject()); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| global, name, json_object, DONT_ENUM).Check(); |
| 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); |
| } |
| |
| // -- 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); |
| |
| { // --- arguments_boilerplate_ |
| // 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->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("Arguments")); |
| Handle<Code> code(isolate->builtins()->builtin(Builtins::kIllegal)); |
| |
| Handle<JSFunction> function = factory->NewFunctionWithoutPrototype( |
| arguments_string, code); |
| ASSERT(!function->has_initial_map()); |
| function->shared()->set_instance_class_name(*arguments_string); |
| function->shared()->set_expected_nof_properties(2); |
| function->set_prototype_or_initial_map( |
| native_context()->object_function()->prototype()); |
| Handle<JSObject> result = factory->NewJSObject(function); |
| |
| native_context()->set_sloppy_arguments_boilerplate(*result); |
| // Note: length must be added as the first property and |
| // callee must be added as the second property. |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| result, factory->length_string(), |
| factory->undefined_value(), DONT_ENUM, |
| Object::FORCE_TAGGED, FORCE_FIELD).Check(); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| result, factory->callee_string(), |
| factory->undefined_value(), DONT_ENUM, |
| Object::FORCE_TAGGED, FORCE_FIELD).Check(); |
| |
| #ifdef DEBUG |
| LookupResult lookup(isolate); |
| result->LookupOwn(factory->callee_string(), &lookup); |
| ASSERT(lookup.IsField()); |
| ASSERT(lookup.GetFieldIndex().property_index() == |
| Heap::kArgumentsCalleeIndex); |
| |
| result->LookupOwn(factory->length_string(), &lookup); |
| ASSERT(lookup.IsField()); |
| ASSERT(lookup.GetFieldIndex().property_index() == |
| Heap::kArgumentsLengthIndex); |
| |
| ASSERT(result->map()->inobject_properties() > Heap::kArgumentsCalleeIndex); |
| ASSERT(result->map()->inobject_properties() > Heap::kArgumentsLengthIndex); |
| |
| // Check the state of the object. |
| ASSERT(result->HasFastProperties()); |
| ASSERT(result->HasFastObjectElements()); |
| #endif |
| } |
| |
| { // --- aliased_arguments_boilerplate_ |
| // Set up a well-formed parameter map to make assertions happy. |
| Handle<FixedArray> elements = factory->NewFixedArray(2); |
| elements->set_map(heap->sloppy_arguments_elements_map()); |
| Handle<FixedArray> array; |
| array = factory->NewFixedArray(0); |
| elements->set(0, *array); |
| array = factory->NewFixedArray(0); |
| elements->set(1, *array); |
| |
| Handle<Map> old_map( |
| native_context()->sloppy_arguments_boilerplate()->map()); |
| Handle<Map> new_map = Map::Copy(old_map); |
| new_map->set_pre_allocated_property_fields(2); |
| Handle<JSObject> result = factory->NewJSObjectFromMap(new_map); |
| // Set elements kind after allocating the object because |
| // NewJSObjectFromMap assumes a fast elements map. |
| new_map->set_elements_kind(SLOPPY_ARGUMENTS_ELEMENTS); |
| result->set_elements(*elements); |
| ASSERT(result->HasSloppyArgumentsElements()); |
| native_context()->set_aliased_arguments_boilerplate(*result); |
| } |
| |
| { // --- strict mode arguments boilerplate |
| 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 = GetStrictPoisonFunction(); |
| |
| // 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 |
| FieldDescriptor d( |
| factory->length_string(), 0, DONT_ENUM, Representation::Tagged()); |
| map->AppendDescriptor(&d); |
| } |
| { // callee |
| CallbacksDescriptor d(factory->callee_string(), |
| callee, |
| attributes); |
| map->AppendDescriptor(&d); |
| } |
| { // caller |
| CallbacksDescriptor d(factory->caller_string(), |
| caller, |
| attributes); |
| map->AppendDescriptor(&d); |
| } |
| |
| map->set_function_with_prototype(true); |
| map->set_prototype(native_context()->object_function()->prototype()); |
| map->set_pre_allocated_property_fields(1); |
| map->set_inobject_properties(1); |
| |
| // Copy constructor from the sloppy arguments boilerplate. |
| map->set_constructor( |
| native_context()->sloppy_arguments_boilerplate()->map()->constructor()); |
| |
| // Allocate the arguments boilerplate object. |
| Handle<JSObject> result = factory->NewJSObjectFromMap(map); |
| native_context()->set_strict_arguments_boilerplate(*result); |
| |
| // Add length property only for strict mode boilerplate. |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| result, factory->length_string(), |
| factory->undefined_value(), DONT_ENUM).Check(); |
| |
| #ifdef DEBUG |
| LookupResult lookup(isolate); |
| result->LookupOwn(factory->length_string(), &lookup); |
| ASSERT(lookup.IsField()); |
| ASSERT(lookup.GetFieldIndex().property_index() == |
| Heap::kArgumentsLengthIndex); |
| |
| ASSERT(result->map()->inobject_properties() > Heap::kArgumentsLengthIndex); |
| |
| // Check the state of the object. |
| ASSERT(result->HasFastProperties()); |
| ASSERT(result->HasFastObjectElements()); |
| #endif |
| } |
| |
| { // --- 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_ASCII_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); |
| result->set_initial_map(*initial_map); |
| initial_map->set_constructor(*result); |
| *fun = result; |
| |
| ElementsKind external_kind = GetNextTransitionElementsKind(elements_kind); |
| *external_map = Map::AsElementsKind(initial_map, external_kind); |
| } |
| |
| |
| void Genesis::InitializeExperimentalGlobal() { |
| Handle<JSObject> global = Handle<JSObject>(native_context()->global_object()); |
| |
| // TODO(mstarzinger): Move this into Genesis::InitializeGlobal once we no |
| // longer need to live behind flags, so functions get added to the snapshot. |
| |
| if (FLAG_harmony_symbols) { |
| // --- 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); |
| } |
| |
| if (FLAG_harmony_collections) { |
| // -- M a p |
| InstallFunction(global, "Map", JS_MAP_TYPE, JSMap::kSize, |
| isolate()->initial_object_prototype(), Builtins::kIllegal); |
| // -- S e t |
| InstallFunction(global, "Set", JS_SET_TYPE, JSSet::kSize, |
| isolate()->initial_object_prototype(), Builtins::kIllegal); |
| { // -- S e t I t e r a t o r |
| Handle<JSObject> builtins(native_context()->builtins()); |
| 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<JSObject> builtins(native_context()->builtins()); |
| 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()); |
| } |
| } |
| |
| if (FLAG_harmony_generators) { |
| // Create generator meta-objects and install them on the builtins object. |
| Handle<JSObject> builtins(native_context()->builtins()); |
| Handle<JSObject> generator_object_prototype = |
| factory()->NewJSObject(isolate()->object_function(), TENURED); |
| Handle<JSFunction> generator_function_prototype = InstallFunction( |
| builtins, "GeneratorFunctionPrototype", JS_FUNCTION_TYPE, |
| JSFunction::kHeaderSize, generator_object_prototype, |
| Builtins::kIllegal); |
| InstallFunction(builtins, "GeneratorFunction", |
| JS_FUNCTION_TYPE, JSFunction::kSize, |
| generator_function_prototype, Builtins::kIllegal); |
| |
| // Create maps for generator functions and their prototypes. Store those |
| // maps in the native context. |
| Handle<Map> sloppy_function_map(native_context()->sloppy_function_map()); |
| Handle<Map> generator_function_map = Map::Copy(sloppy_function_map); |
| generator_function_map->set_prototype(*generator_function_prototype); |
| native_context()->set_sloppy_generator_function_map( |
| *generator_function_map); |
| |
| // The "arguments" and "caller" instance properties aren't specified, so |
| // technically we could leave them out. They make even less sense for |
| // generators than for functions. Still, the same argument that it makes |
| // sense to keep them around but poisoned in strict mode applies to |
| // generators as well. With poisoned accessors, naive callers can still |
| // iterate over the properties without accessing them. |
| // |
| // We can't use PoisonArgumentsAndCaller because that mutates accessor pairs |
| // in place, and the initial state of the generator function map shares the |
| // accessor pair with sloppy functions. Also the error message should be |
| // different. Also unhappily, we can't use the API accessors to implement |
| // poisoning, because API accessors present themselves as data properties, |
| // not accessor properties, and so getOwnPropertyDescriptor raises an |
| // exception as it tries to get the values. Sadness. |
| Handle<AccessorPair> poison_pair(factory()->NewAccessorPair()); |
| PropertyAttributes rw_attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE); |
| Handle<JSFunction> poison_function = GetGeneratorPoisonFunction(); |
| poison_pair->set_getter(*poison_function); |
| poison_pair->set_setter(*poison_function); |
| ReplaceAccessors(generator_function_map, factory()->arguments_string(), |
| rw_attribs, poison_pair); |
| ReplaceAccessors(generator_function_map, factory()->caller_string(), |
| rw_attribs, poison_pair); |
| |
| Handle<Map> strict_function_map(native_context()->strict_function_map()); |
| Handle<Map> strict_generator_function_map = Map::Copy(strict_function_map); |
| // "arguments" and "caller" already poisoned. |
| strict_generator_function_map->set_prototype(*generator_function_prototype); |
| native_context()->set_strict_generator_function_map( |
| *strict_generator_function_map); |
| |
| Handle<JSFunction> object_function(native_context()->object_function()); |
| Handle<Map> generator_object_prototype_map = Map::Create( |
| object_function, 0); |
| generator_object_prototype_map->set_prototype( |
| *generator_object_prototype); |
| native_context()->set_generator_object_prototype_map( |
| *generator_object_prototype_map); |
| } |
| |
| if (FLAG_harmony_collections || FLAG_harmony_generators) { |
| // Collection forEach uses an iterator result object. |
| // Generators return iteraror result objects. |
| |
| STATIC_ASSERT(JSGeneratorObject::kResultPropertyCount == 2); |
| Handle<JSFunction> object_function(native_context()->object_function()); |
| ASSERT(object_function->initial_map()->inobject_properties() == 0); |
| Handle<Map> iterator_result_map = Map::Create( |
| object_function, JSGeneratorObject::kResultPropertyCount); |
| ASSERT(iterator_result_map->inobject_properties() == |
| JSGeneratorObject::kResultPropertyCount); |
| Map::EnsureDescriptorSlack( |
| iterator_result_map, JSGeneratorObject::kResultPropertyCount); |
| |
| FieldDescriptor value_descr(isolate()->factory()->value_string(), |
| JSGeneratorObject::kResultValuePropertyIndex, |
| NONE, |
| Representation::Tagged()); |
| iterator_result_map->AppendDescriptor(&value_descr); |
| |
| FieldDescriptor done_descr(isolate()->factory()->done_string(), |
| JSGeneratorObject::kResultDonePropertyIndex, |
| NONE, |
| Representation::Tagged()); |
| iterator_result_map->AppendDescriptor(&done_descr); |
| |
| iterator_result_map->set_unused_property_fields(0); |
| ASSERT_EQ(JSGeneratorObject::kResultSize, |
| iterator_result_map->instance_size()); |
| native_context()->set_iterator_result_map(*iterator_result_map); |
| } |
| } |
| |
| |
| bool Genesis::CompileBuiltin(Isolate* isolate, int index) { |
| Vector<const char> name = Natives::GetScriptName(index); |
| Handle<String> source_code = |
| isolate->bootstrapper()->NativesSourceLookup(index); |
| return CompileNative(isolate, name, source_code); |
| } |
| |
| |
| bool Genesis::CompileExperimentalBuiltin(Isolate* isolate, int index) { |
| Vector<const char> name = ExperimentalNatives::GetScriptName(index); |
| Factory* factory = isolate->factory(); |
| Handle<String> source_code; |
| ASSIGN_RETURN_ON_EXCEPTION_VALUE( |
| isolate, source_code, |
| factory->NewStringFromAscii( |
| ExperimentalNatives::GetRawScriptSource(index)), |
| false); |
| return CompileNative(isolate, name, source_code); |
| } |
| |
| |
| bool Genesis::CompileNative(Isolate* isolate, |
| Vector<const char> name, |
| Handle<String> source) { |
| HandleScope scope(isolate); |
| 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()) return false; |
| |
| bool result = CompileScriptCached(isolate, |
| name, |
| source, |
| NULL, |
| NULL, |
| Handle<Context>(isolate->context()), |
| true); |
| ASSERT(isolate->has_pending_exception() != result); |
| if (!result) isolate->clear_pending_exception(); |
| return result; |
| } |
| |
| |
| bool Genesis::CompileScriptCached(Isolate* isolate, |
| Vector<const char> name, |
| Handle<String> source, |
| SourceCodeCache* cache, |
| v8::Extension* extension, |
| Handle<Context> top_context, |
| bool use_runtime_context) { |
| Factory* factory = isolate->factory(); |
| HandleScope scope(isolate); |
| Handle<SharedFunctionInfo> function_info; |
| |
| // If we can't find the function in the cache, we compile a new |
| // function and insert it into the cache. |
| if (cache == NULL || !cache->Lookup(name, &function_info)) { |
| ASSERT(source->IsOneByteRepresentation()); |
| Handle<String> script_name = |
| factory->NewStringFromUtf8(name).ToHandleChecked(); |
| function_info = Compiler::CompileScript( |
| source, |
| script_name, |
| 0, |
| 0, |
| false, |
| top_context, |
| extension, |
| NULL, |
| NO_CACHED_DATA, |
| use_runtime_context ? NATIVES_CODE : NOT_NATIVES_CODE); |
| if (function_info.is_null()) return false; |
| if (cache != NULL) 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. |
| ASSERT(top_context->IsNativeContext()); |
| Handle<Context> context = |
| Handle<Context>(use_runtime_context |
| ? Handle<Context>(top_context->runtime_context()) |
| : top_context); |
| 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 = |
| Handle<Object>(use_runtime_context |
| ? top_context->builtins() |
| : top_context->global_object(), |
| isolate); |
| return !Execution::Call( |
| isolate, fun, receiver, 0, NULL).is_null(); |
| } |
| |
| |
| #define INSTALL_NATIVE(Type, name, var) \ |
| Handle<String> var##_name = \ |
| factory()->InternalizeOneByteString(STATIC_ASCII_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, "GlobalEval", global_eval_fun); |
| INSTALL_NATIVE(JSFunction, "Instantiate", instantiate_fun); |
| INSTALL_NATIVE(JSFunction, "ConfigureTemplateInstance", |
| configure_instance_fun); |
| INSTALL_NATIVE(JSFunction, "GetStackTraceLine", get_stack_trace_line_fun); |
| INSTALL_NATIVE(JSObject, "functionCache", function_cache); |
| INSTALL_NATIVE(JSFunction, "ToCompletePropertyDescriptor", |
| to_complete_property_descriptor); |
| |
| INSTALL_NATIVE(JSFunction, "IsPromise", is_promise); |
| 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, "NotifyChange", observers_notify_change); |
| INSTALL_NATIVE(JSFunction, "EnqueueSpliceRecord", observers_enqueue_splice); |
| INSTALL_NATIVE(JSFunction, "BeginPerformSplice", |
| observers_begin_perform_splice); |
| INSTALL_NATIVE(JSFunction, "EndPerformSplice", |
| observers_end_perform_splice); |
| INSTALL_NATIVE(JSFunction, "NativeObjectObserve", |
| native_object_observe); |
| INSTALL_NATIVE(JSFunction, "NativeObjectGetNotifier", |
| native_object_get_notifier); |
| INSTALL_NATIVE(JSFunction, "NativeObjectNotifierPerformChange", |
| native_object_notifier_perform_change); |
| } |
| |
| |
| void Genesis::InstallExperimentalNativeFunctions() { |
| if (FLAG_harmony_proxies) { |
| INSTALL_NATIVE(JSFunction, "DerivedHasTrap", derived_has_trap); |
| INSTALL_NATIVE(JSFunction, "DerivedGetTrap", derived_get_trap); |
| INSTALL_NATIVE(JSFunction, "DerivedSetTrap", derived_set_trap); |
| INSTALL_NATIVE(JSFunction, "ProxyEnumerate", proxy_enumerate); |
| } |
| |
| if (FLAG_harmony_symbols) { |
| INSTALL_NATIVE(Symbol, "symbolIterator", iterator_symbol); |
| } |
| } |
| |
| #undef INSTALL_NATIVE |
| |
| |
| Handle<JSFunction> Genesis::InstallInternalArray( |
| Handle<JSBuiltinsObject> builtins, |
| 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( |
| builtins, 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); |
| initial_map->set_elements_kind(elements_kind); |
| array_function->set_initial_map(*initial_map); |
| |
| // 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. |
| CallbacksDescriptor d( |
| Handle<Name>(Name::cast(array_length->name())), array_length, attribs); |
| array_function->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_ASCII_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_context(*native_context()); |
| builtins->set_global_receiver(*builtins); |
| builtins->set_global_receiver(native_context()->global_proxy()); |
| |
| |
| // Set up the 'global' properties of the builtins object. The |
| // 'global' property that refers to the global object is the only |
| // way to get from code running in the builtins context to the |
| // global object. |
| static const PropertyAttributes attributes = |
| static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE); |
| Handle<String> global_string = |
| factory()->InternalizeOneByteString(STATIC_ASCII_VECTOR("global")); |
| Handle<Object> global_obj(native_context()->global_object(), isolate()); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| builtins, global_string, global_obj, attributes).Check(); |
| Handle<String> builtins_string = |
| factory()->InternalizeOneByteString(STATIC_ASCII_VECTOR("builtins")); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| builtins, builtins_string, builtins, attributes).Check(); |
| |
| // 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()); |
| ASSERT(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); |
| |
| { // -- 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); |
| native_context()->set_script_function(*script_fun); |
| |
| Handle<Map> script_map = Handle<Map>(script_fun->initial_map()); |
| Map::EnsureDescriptorSlack(script_map, 13); |
| |
| PropertyAttributes attribs = |
| static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); |
| |
| Handle<AccessorInfo> script_column = |
| Accessors::ScriptColumnOffsetInfo(isolate(), attribs); |
| { |
| CallbacksDescriptor d(Handle<Name>(Name::cast(script_column->name())), |
| script_column, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_id = |
| Accessors::ScriptIdInfo(isolate(), attribs); |
| { |
| CallbacksDescriptor d(Handle<Name>(Name::cast(script_id->name())), |
| script_id, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| |
| Handle<AccessorInfo> script_name = |
| Accessors::ScriptNameInfo(isolate(), attribs); |
| { |
| CallbacksDescriptor d(Handle<Name>(Name::cast(script_name->name())), |
| script_name, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_line = |
| Accessors::ScriptLineOffsetInfo(isolate(), attribs); |
| { |
| CallbacksDescriptor d(Handle<Name>(Name::cast(script_line->name())), |
| script_line, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_source = |
| Accessors::ScriptSourceInfo(isolate(), attribs); |
| { |
| CallbacksDescriptor d(Handle<Name>(Name::cast(script_source->name())), |
| script_source, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_type = |
| Accessors::ScriptTypeInfo(isolate(), attribs); |
| { |
| CallbacksDescriptor d(Handle<Name>(Name::cast(script_type->name())), |
| script_type, attribs); |
| script_map->AppendDescriptor(&d); |
| } |
| |
| Handle<AccessorInfo> script_compilation_type = |
| Accessors::ScriptCompilationTypeInfo(isolate(), attribs); |
| { |
| CallbacksDescriptor 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); |
| { |
| CallbacksDescriptor 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); |
| { |
| CallbacksDescriptor 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); |
| { |
| CallbacksDescriptor 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); |
| { |
| CallbacksDescriptor 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); |
| { |
| CallbacksDescriptor d( |
| Handle<Name>(Name::cast(script_eval_from_function_name->name())), |
| script_eval_from_function_name, 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); |
| 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. |
| { |
| Handle<JSFunction> array_function = |
| InstallInternalArray(builtins, "InternalArray", FAST_HOLEY_ELEMENTS); |
| native_context()->set_internal_array_function(*array_function); |
| } |
| |
| { |
| InstallInternalArray(builtins, "InternalPackedArray", FAST_ELEMENTS); |
| } |
| |
| if (FLAG_disable_native_files) { |
| PrintF("Warning: Running without installed natives!\n"); |
| return true; |
| } |
| |
| // Install natives. |
| for (int i = Natives::GetDebuggerCount(); |
| i < Natives::GetBuiltinsCount(); |
| i++) { |
| if (!CompileBuiltin(isolate(), i)) return false; |
| // TODO(ager): We really only need to install the JS builtin |
| // functions on the builtins object after compiling and running |
| // runtime.js. |
| if (!InstallJSBuiltins(builtins)) return false; |
| } |
| |
| InstallNativeFunctions(); |
| |
| // 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()); |
| ASSERT(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_class_string(); |
| Handle<JSFunction> function = |
| Handle<JSFunction>::cast(Object::GetProperty( |
| isolate()->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(); |
| ASSERT(call->is_compiled()); |
| |
| // Set the expected parameters for apply to 2; required by builtin. |
| apply->shared()->set_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->set_constructor(*array_constructor); |
| |
| // Set prototype on map. |
| initial_map->set_non_instance_prototype(false); |
| initial_map->set_prototype(*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()); |
| ASSERT(old != DescriptorArray::kNotFound); |
| CallbacksDescriptor desc(length, |
| handle(array_descriptors->GetValue(old), |
| isolate()), |
| array_descriptors->GetDetails(old).attributes()); |
| initial_map->AppendDescriptor(&desc); |
| } |
| { |
| FieldDescriptor index_field(factory()->index_string(), |
| JSRegExpResult::kIndexIndex, |
| NONE, |
| Representation::Tagged()); |
| initial_map->AppendDescriptor(&index_field); |
| } |
| |
| { |
| FieldDescriptor 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); |
| } |
| |
| #ifdef VERIFY_HEAP |
| builtins->ObjectVerify(); |
| #endif |
| |
| return true; |
| } |
| |
| |
| #define INSTALL_EXPERIMENTAL_NATIVE(i, flag, file) \ |
| if (FLAG_harmony_##flag && \ |
| strcmp(ExperimentalNatives::GetScriptName(i).start(), \ |
| "native " file) == 0) { \ |
| if (!CompileExperimentalBuiltin(isolate(), i)) return false; \ |
| } |
| |
| |
| bool Genesis::InstallExperimentalNatives() { |
| for (int i = ExperimentalNatives::GetDebuggerCount(); |
| i < ExperimentalNatives::GetBuiltinsCount(); |
| i++) { |
| INSTALL_EXPERIMENTAL_NATIVE(i, symbols, "symbol.js") |
| INSTALL_EXPERIMENTAL_NATIVE(i, proxies, "proxy.js") |
| INSTALL_EXPERIMENTAL_NATIVE(i, collections, "collection.js") |
| INSTALL_EXPERIMENTAL_NATIVE(i, collections, "collection-iterator.js") |
| INSTALL_EXPERIMENTAL_NATIVE(i, generators, "generator.js") |
| INSTALL_EXPERIMENTAL_NATIVE(i, iteration, "array-iterator.js") |
| INSTALL_EXPERIMENTAL_NATIVE(i, strings, "harmony-string.js") |
| INSTALL_EXPERIMENTAL_NATIVE(i, arrays, "harmony-array.js") |
| INSTALL_EXPERIMENTAL_NATIVE(i, maths, "harmony-math.js") |
| } |
| |
| InstallExperimentalNativeFunctions(); |
| InstallExperimentalBuiltinFunctionIds(); |
| return true; |
| } |
| |
| |
| 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()); |
| } |
| ASSERT_EQ(".prototype", period_pos); |
| Vector<const char> property(holder_expr, |
| static_cast<int>(period_pos - holder_expr)); |
| Handle<String> property_string = factory->InternalizeUtf8String(property); |
| ASSERT(!property_string.is_null()); |
| Handle<JSFunction> function = Handle<JSFunction>::cast( |
| Object::GetProperty(global, property_string).ToHandleChecked()); |
| return Handle<JSObject>(JSObject::cast(function->prototype())); |
| } |
| |
| |
| 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()); |
| #define INSTALL_BUILTIN_ID(holder_expr, fun_name, name) \ |
| { \ |
| Handle<JSObject> holder = ResolveBuiltinIdHolder( \ |
| native_context(), #holder_expr); \ |
| BuiltinFunctionId id = k##name; \ |
| InstallBuiltinFunctionId(holder, #fun_name, id); \ |
| } |
| FUNCTIONS_WITH_ID_LIST(INSTALL_BUILTIN_ID) |
| #undef INSTALL_BUILTIN_ID |
| } |
| |
| |
| void Genesis::InstallExperimentalBuiltinFunctionIds() { |
| HandleScope scope(isolate()); |
| if (FLAG_harmony_maths) { |
| Handle<JSObject> holder = ResolveBuiltinIdHolder(native_context(), "Math"); |
| InstallBuiltinFunctionId(holder, "clz32", kMathClz32); |
| } |
| } |
| |
| |
| // 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(); |
| Factory* factory = isolate->factory(); |
| HandleScope scope(isolate); |
| Handle<JSGlobalObject> global(JSGlobalObject::cast( |
| native_context->global_object())); |
| // 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 = |
| factory->InternalizeUtf8String(FLAG_expose_natives_as); |
| RETURN_ON_EXCEPTION_VALUE( |
| isolate, |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| global, natives, Handle<JSObject>(global->builtins()), DONT_ENUM), |
| false); |
| } |
| |
| Handle<Object> Error = Object::GetProperty( |
| isolate, global, "Error").ToHandleChecked(); |
| if (Error->IsJSObject()) { |
| Handle<String> name = factory->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("stackTraceLimit")); |
| Handle<Smi> stack_trace_limit( |
| Smi::FromInt(FLAG_stack_trace_limit), isolate); |
| RETURN_ON_EXCEPTION_VALUE( |
| isolate, |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| Handle<JSObject>::cast(Error), name, stack_trace_limit, 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); |
| Handle<Object> global_proxy(debug_context->global_proxy(), isolate); |
| RETURN_ON_EXCEPTION_VALUE( |
| isolate, |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| global, debug_string, global_proxy, DONT_ENUM), |
| false); |
| } |
| 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), false); |
| 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_.Lookup(extension, Hash(extension), true)->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; |
| } |
| ASSERT(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. |
| Handle<String> source_code = |
| isolate->factory()->NewExternalStringFromAscii( |
| extension->source()).ToHandleChecked(); |
| bool result = CompileScriptCached(isolate, |
| CStrVector(extension->name()), |
| source_code, |
| isolate->bootstrapper()->extensions_cache(), |
| extension, |
| Handle<Context>(isolate->context()), |
| false); |
| ASSERT(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. |
| 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); |
| if (!Compiler::EnsureCompiled(function, CLEAR_EXCEPTION)) { |
| return false; |
| } |
| builtins->set_javascript_builtin_code(id, function->shared()->code()); |
| } |
| return true; |
| } |
| |
| |
| bool Genesis::ConfigureGlobalObjects( |
| v8::Handle<v8::ObjectTemplate> global_proxy_template) { |
| Handle<JSObject> global_proxy( |
| JSObject::cast(native_context()->global_proxy())); |
| Handle<JSObject> inner_global( |
| JSObject::cast(native_context()->global_object())); |
| |
| if (!global_proxy_template.IsEmpty()) { |
| // Configure the global proxy object. |
| Handle<ObjectTemplateInfo> proxy_data = |
| v8::Utils::OpenHandle(*global_proxy_template); |
| if (!ConfigureApiObject(global_proxy, proxy_data)) return false; |
| |
| // Configure the inner global object. |
| Handle<FunctionTemplateInfo> proxy_constructor( |
| FunctionTemplateInfo::cast(proxy_data->constructor())); |
| if (!proxy_constructor->prototype_template()->IsUndefined()) { |
| Handle<ObjectTemplateInfo> inner_data( |
| ObjectTemplateInfo::cast(proxy_constructor->prototype_template())); |
| if (!ConfigureApiObject(inner_global, inner_data)) return false; |
| } |
| } |
| |
| SetObjectPrototype(global_proxy, inner_global); |
| |
| native_context()->set_initial_array_prototype( |
| JSArray::cast(native_context()->array_function()->prototype())); |
| |
| return true; |
| } |
| |
| |
| bool Genesis::ConfigureApiObject(Handle<JSObject> object, |
| Handle<ObjectTemplateInfo> object_template) { |
| ASSERT(!object_template.is_null()); |
| ASSERT(FunctionTemplateInfo::cast(object_template->constructor()) |
| ->IsTemplateFor(object->map()));; |
| |
| MaybeHandle<JSObject> maybe_obj = |
| Execution::InstantiateObject(object_template); |
| Handle<JSObject> obj; |
| if (!maybe_obj.ToHandle(&obj)) { |
| ASSERT(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 (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 FIELD: { |
| HandleScope inner(isolate()); |
| Handle<Name> key = Handle<Name>(descs->GetKey(i)); |
| FieldIndex index = FieldIndex::ForDescriptor(from->map(), i); |
| ASSERT(!descs->GetDetails(i).representation().IsDouble()); |
| Handle<Object> value = Handle<Object>(from->RawFastPropertyAt(index), |
| isolate()); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| to, key, value, details.attributes()).Check(); |
| break; |
| } |
| case CONSTANT: { |
| HandleScope inner(isolate()); |
| Handle<Name> key = Handle<Name>(descs->GetKey(i)); |
| Handle<Object> constant(descs->GetConstant(i), isolate()); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| to, key, constant, details.attributes()).Check(); |
| break; |
| } |
| case CALLBACKS: { |
| LookupResult result(isolate()); |
| Handle<Name> key(Name::cast(descs->GetKey(i)), isolate()); |
| to->LookupOwn(key, &result); |
| // If the property is already there we skip it |
| if (result.IsFound()) continue; |
| HandleScope inner(isolate()); |
| ASSERT(!to->HasFastProperties()); |
| // Add to dictionary. |
| Handle<Object> callbacks(descs->GetCallbacksObject(i), isolate()); |
| PropertyDetails d = PropertyDetails( |
| details.attributes(), CALLBACKS, i + 1); |
| JSObject::SetNormalizedProperty(to, key, callbacks, d); |
| break; |
| } |
| case NORMAL: |
| // Do not occur since the from object has fast properties. |
| case HANDLER: |
| case INTERCEPTOR: |
| case NONEXISTENT: |
| // No element in instance descriptors have proxy or interceptor type. |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } 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)) { |
| ASSERT(raw_key->IsName()); |
| // If the property is already there we skip it. |
| LookupResult result(isolate()); |
| Handle<Name> key(Name::cast(raw_key)); |
| to->LookupOwn(key, &result); |
| if (result.IsFound()) continue; |
| // Set the property. |
| Handle<Object> value = Handle<Object>(properties->ValueAt(i), |
| isolate()); |
| ASSERT(!value->IsCell()); |
| if (value->IsPropertyCell()) { |
| value = Handle<Object>(PropertyCell::cast(*value)->value(), |
| isolate()); |
| } |
| PropertyDetails details = properties->DetailsAt(i); |
| JSObject::SetOwnPropertyIgnoreAttributes( |
| to, key, value, details.attributes()).Check(); |
| } |
| } |
| } |
| } |
| |
| |
| 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()); |
| |
| ASSERT(!from->IsJSArray()); |
| ASSERT(!to->IsJSArray()); |
| |
| TransferNamedProperties(from, to); |
| TransferIndexedProperties(from, to); |
| |
| // Transfer the prototype (new map is needed). |
| Handle<Map> old_to_map = Handle<Map>(to->map()); |
| Handle<Map> new_to_map = Map::Copy(old_to_map); |
| new_to_map->set_prototype(from->map()->prototype()); |
| to->set_map(*new_to_map); |
| } |
| |
| |
| 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. |
| ASSERT(!sloppy_function_map_writable_prototype_.is_null()); |
| ASSERT(!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) { |
| if (isolate->serializer_enabled()) { |
| // Disable tracking double fields because heap numbers treated as |
| // immutable by the serializer. |
| FLAG_track_double_fields = false; |
| } |
| } |
| |
| ~NoTrackDoubleFieldsForSerializerScope() { |
| FLAG_track_double_fields = flag_; |
| } |
| |
| private: |
| bool flag_; |
| }; |
| |
| |
| Genesis::Genesis(Isolate* isolate, |
| Handle<Object> global_object, |
| v8::Handle<v8::ObjectTemplate> global_template, |
| v8::ExtensionConfiguration* extensions) |
| : isolate_(isolate), |
| active_(isolate->bootstrapper()) { |
| NoTrackDoubleFieldsForSerializerScope disable_scope(isolate); |
| result_ = Handle<Context>::null(); |
| // If V8 cannot be initialized, just return. |
| if (!V8::Initialize(NULL)) return; |
| |
| // 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()) return; |
| |
| // We can only de-serialize a context if the isolate was initialized from |
| // a snapshot. Otherwise we have to build the context from scratch. |
| if (isolate->initialized_from_snapshot()) { |
| native_context_ = Snapshot::NewContextFromSnapshot(isolate); |
| } else { |
| native_context_ = Handle<Context>(); |
| } |
| |
| if (!native_context().is_null()) { |
| AddToWeakNativeContextList(*native_context()); |
| isolate->set_context(*native_context()); |
| isolate->counters()->contexts_created_by_snapshot()->Increment(); |
| Handle<GlobalObject> inner_global; |
| Handle<JSGlobalProxy> global_proxy = |
| CreateNewGlobals(global_template, |
| global_object, |
| &inner_global); |
| |
| HookUpGlobalProxy(inner_global, global_proxy); |
| HookUpInnerGlobal(inner_global); |
| native_context()->builtins()->set_global_receiver( |
| native_context()->global_proxy()); |
| |
| if (!ConfigureGlobalObjects(global_template)) return; |
| } else { |
| // We get here if there was no context snapshot. |
| CreateRoots(); |
| Handle<JSFunction> empty_function = CreateEmptyFunction(isolate); |
| CreateStrictModeFunctionMaps(empty_function); |
| Handle<GlobalObject> inner_global; |
| Handle<JSGlobalProxy> global_proxy = |
| CreateNewGlobals(global_template, global_object, &inner_global); |
| HookUpGlobalProxy(inner_global, global_proxy); |
| InitializeGlobal(inner_global, empty_function); |
| InstallJSFunctionResultCaches(); |
| InitializeNormalizedMapCaches(); |
| if (!InstallNatives()) return; |
| |
| MakeFunctionInstancePrototypeWritable(); |
| |
| if (!ConfigureGlobalObjects(global_template)) return; |
| isolate->counters()->contexts_created_from_scratch()->Increment(); |
| } |
| |
| // Initialize experimental globals and install experimental natives. |
| InitializeExperimentalGlobal(); |
| if (!InstallExperimentalNatives()) return; |
| |
| // We can't (de-)serialize typed arrays currently, but we are lucky: The state |
| // of the random number generator needs no initialization during snapshot |
| // creation time and we don't need trigonometric functions then. |
| if (!isolate->serializer_enabled()) { |
| // Initially seed the per-context random number generator using the |
| // per-isolate random number generator. |
| const int num_elems = 2; |
| const int num_bytes = num_elems * sizeof(uint32_t); |
| uint32_t* state = reinterpret_cast<uint32_t*>(malloc(num_bytes)); |
| |
| do { |
| isolate->random_number_generator()->NextBytes(state, num_bytes); |
| } while (state[0] == 0 || state[1] == 0); |
| |
| v8::Local<v8::ArrayBuffer> buffer = v8::ArrayBuffer::New( |
| reinterpret_cast<v8::Isolate*>(isolate), state, num_bytes); |
| Utils::OpenHandle(*buffer)->set_should_be_freed(true); |
| v8::Local<v8::Uint32Array> ta = v8::Uint32Array::New(buffer, 0, num_elems); |
| Handle<JSBuiltinsObject> builtins(native_context()->builtins()); |
| Runtime::ForceSetObjectProperty(builtins, |
| factory()->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("rngstate")), |
| Utils::OpenHandle(*ta), |
| NONE).Assert(); |
| |
| // Initialize trigonometric lookup tables and constants. |
| const int table_num_bytes = TrigonometricLookupTable::table_num_bytes(); |
| v8::Local<v8::ArrayBuffer> sin_buffer = v8::ArrayBuffer::New( |
| reinterpret_cast<v8::Isolate*>(isolate), |
| TrigonometricLookupTable::sin_table(), table_num_bytes); |
| v8::Local<v8::ArrayBuffer> cos_buffer = v8::ArrayBuffer::New( |
| reinterpret_cast<v8::Isolate*>(isolate), |
| TrigonometricLookupTable::cos_x_interval_table(), table_num_bytes); |
| v8::Local<v8::Float64Array> sin_table = v8::Float64Array::New( |
| sin_buffer, 0, TrigonometricLookupTable::table_size()); |
| v8::Local<v8::Float64Array> cos_table = v8::Float64Array::New( |
| cos_buffer, 0, TrigonometricLookupTable::table_size()); |
| |
| Runtime::ForceSetObjectProperty(builtins, |
| factory()->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("kSinTable")), |
| Utils::OpenHandle(*sin_table), |
| NONE).Assert(); |
| Runtime::ForceSetObjectProperty( |
| builtins, |
| factory()->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("kCosXIntervalTable")), |
| Utils::OpenHandle(*cos_table), |
| NONE).Assert(); |
| Runtime::ForceSetObjectProperty( |
| builtins, |
| factory()->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("kSamples")), |
| factory()->NewHeapNumber( |
| TrigonometricLookupTable::samples()), |
| NONE).Assert(); |
| Runtime::ForceSetObjectProperty( |
| builtins, |
| factory()->InternalizeOneByteString( |
| STATIC_ASCII_VECTOR("kIndexConvert")), |
| factory()->NewHeapNumber( |
| TrigonometricLookupTable::samples_over_pi_half()), |
| NONE).Assert(); |
| } |
| |
| 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() { |
| ASSERT(!IsActive()); |
| } |
| |
| } } // namespace v8::internal |