1 // Copyright 2014 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "src/bootstrapper.h" 6 7 #include "src/accessors.h" 8 #include "src/api-natives.h" 9 #include "src/base/ieee754.h" 10 #include "src/code-stubs.h" 11 #include "src/compiler.h" 12 #include "src/extensions/externalize-string-extension.h" 13 #include "src/extensions/free-buffer-extension.h" 14 #include "src/extensions/gc-extension.h" 15 #include "src/extensions/ignition-statistics-extension.h" 16 #include "src/extensions/statistics-extension.h" 17 #include "src/extensions/trigger-failure-extension.h" 18 #include "src/heap/heap.h" 19 #include "src/isolate-inl.h" 20 #include "src/snapshot/natives.h" 21 #include "src/snapshot/snapshot.h" 22 #include "src/wasm/wasm-js.h" 23 24 namespace v8 { 25 namespace internal { 26 27 Bootstrapper::Bootstrapper(Isolate* isolate) 28 : isolate_(isolate), 29 nesting_(0), 30 extensions_cache_(Script::TYPE_EXTENSION) {} 31 32 template <class Source> 33 Handle<String> Bootstrapper::SourceLookup(int index) { 34 DCHECK(0 <= index && index < Source::GetBuiltinsCount()); 35 Heap* heap = isolate_->heap(); 36 if (Source::GetSourceCache(heap)->get(index)->IsUndefined(isolate_)) { 37 // We can use external strings for the natives. 38 Vector<const char> source = Source::GetScriptSource(index); 39 NativesExternalStringResource* resource = 40 new NativesExternalStringResource(source.start(), source.length()); 41 Handle<ExternalOneByteString> source_code = 42 isolate_->factory()->NewNativeSourceString(resource); 43 // Mark this external string with a special map. 44 DCHECK(source_code->is_short()); 45 Source::GetSourceCache(heap)->set(index, *source_code); 46 } 47 Handle<Object> cached_source(Source::GetSourceCache(heap)->get(index), 48 isolate_); 49 return Handle<String>::cast(cached_source); 50 } 51 52 53 template Handle<String> Bootstrapper::SourceLookup<Natives>(int index); 54 template Handle<String> Bootstrapper::SourceLookup<ExperimentalNatives>( 55 int index); 56 template Handle<String> Bootstrapper::SourceLookup<ExperimentalExtraNatives>( 57 int index); 58 template Handle<String> Bootstrapper::SourceLookup<ExtraNatives>(int index); 59 60 61 void Bootstrapper::Initialize(bool create_heap_objects) { 62 extensions_cache_.Initialize(isolate_, create_heap_objects); 63 } 64 65 66 static const char* GCFunctionName() { 67 bool flag_given = FLAG_expose_gc_as != NULL && strlen(FLAG_expose_gc_as) != 0; 68 return flag_given ? FLAG_expose_gc_as : "gc"; 69 } 70 71 72 v8::Extension* Bootstrapper::free_buffer_extension_ = NULL; 73 v8::Extension* Bootstrapper::gc_extension_ = NULL; 74 v8::Extension* Bootstrapper::externalize_string_extension_ = NULL; 75 v8::Extension* Bootstrapper::statistics_extension_ = NULL; 76 v8::Extension* Bootstrapper::trigger_failure_extension_ = NULL; 77 v8::Extension* Bootstrapper::ignition_statistics_extension_ = NULL; 78 79 void Bootstrapper::InitializeOncePerProcess() { 80 free_buffer_extension_ = new FreeBufferExtension; 81 v8::RegisterExtension(free_buffer_extension_); 82 gc_extension_ = new GCExtension(GCFunctionName()); 83 v8::RegisterExtension(gc_extension_); 84 externalize_string_extension_ = new ExternalizeStringExtension; 85 v8::RegisterExtension(externalize_string_extension_); 86 statistics_extension_ = new StatisticsExtension; 87 v8::RegisterExtension(statistics_extension_); 88 trigger_failure_extension_ = new TriggerFailureExtension; 89 v8::RegisterExtension(trigger_failure_extension_); 90 ignition_statistics_extension_ = new IgnitionStatisticsExtension; 91 v8::RegisterExtension(ignition_statistics_extension_); 92 } 93 94 95 void Bootstrapper::TearDownExtensions() { 96 delete free_buffer_extension_; 97 free_buffer_extension_ = NULL; 98 delete gc_extension_; 99 gc_extension_ = NULL; 100 delete externalize_string_extension_; 101 externalize_string_extension_ = NULL; 102 delete statistics_extension_; 103 statistics_extension_ = NULL; 104 delete trigger_failure_extension_; 105 trigger_failure_extension_ = NULL; 106 delete ignition_statistics_extension_; 107 ignition_statistics_extension_ = NULL; 108 } 109 110 111 void DeleteNativeSources(Object* maybe_array) { 112 if (maybe_array->IsFixedArray()) { 113 FixedArray* array = FixedArray::cast(maybe_array); 114 Isolate* isolate = array->GetIsolate(); 115 for (int i = 0; i < array->length(); i++) { 116 Object* natives_source = array->get(i); 117 if (!natives_source->IsUndefined(isolate)) { 118 const NativesExternalStringResource* resource = 119 reinterpret_cast<const NativesExternalStringResource*>( 120 ExternalOneByteString::cast(natives_source)->resource()); 121 delete resource; 122 } 123 } 124 } 125 } 126 127 128 void Bootstrapper::TearDown() { 129 DeleteNativeSources(Natives::GetSourceCache(isolate_->heap())); 130 DeleteNativeSources(ExperimentalNatives::GetSourceCache(isolate_->heap())); 131 DeleteNativeSources(ExtraNatives::GetSourceCache(isolate_->heap())); 132 DeleteNativeSources( 133 ExperimentalExtraNatives::GetSourceCache(isolate_->heap())); 134 135 extensions_cache_.Initialize(isolate_, false); // Yes, symmetrical 136 } 137 138 139 class Genesis BASE_EMBEDDED { 140 public: 141 Genesis(Isolate* isolate, MaybeHandle<JSGlobalProxy> maybe_global_proxy, 142 v8::Local<v8::ObjectTemplate> global_proxy_template, 143 v8::ExtensionConfiguration* extensions, size_t context_snapshot_index, 144 GlobalContextType context_type); 145 Genesis(Isolate* isolate, MaybeHandle<JSGlobalProxy> maybe_global_proxy, 146 v8::Local<v8::ObjectTemplate> global_proxy_template); 147 ~Genesis() { } 148 149 Isolate* isolate() const { return isolate_; } 150 Factory* factory() const { return isolate_->factory(); } 151 Heap* heap() const { return isolate_->heap(); } 152 153 Handle<Context> result() { return result_; } 154 155 Handle<JSGlobalProxy> global_proxy() { return global_proxy_; } 156 157 private: 158 Handle<Context> native_context() { return native_context_; } 159 160 // Creates some basic objects. Used for creating a context from scratch. 161 void CreateRoots(); 162 // Creates the empty function. Used for creating a context from scratch. 163 Handle<JSFunction> CreateEmptyFunction(Isolate* isolate); 164 // Creates the ThrowTypeError function. ECMA 5th Ed. 13.2.3 165 Handle<JSFunction> GetRestrictedFunctionPropertiesThrower(); 166 Handle<JSFunction> GetStrictArgumentsPoisonFunction(); 167 Handle<JSFunction> GetThrowTypeErrorIntrinsic(Builtins::Name builtin_name); 168 169 void CreateStrictModeFunctionMaps(Handle<JSFunction> empty); 170 void CreateIteratorMaps(Handle<JSFunction> empty); 171 void CreateAsyncFunctionMaps(Handle<JSFunction> empty); 172 void CreateJSProxyMaps(); 173 174 // Make the "arguments" and "caller" properties throw a TypeError on access. 175 void AddRestrictedFunctionProperties(Handle<JSFunction> empty); 176 177 // Creates the global objects using the global proxy and the template passed 178 // in through the API. We call this regardless of whether we are building a 179 // context from scratch or using a deserialized one from the partial snapshot 180 // but in the latter case we don't use the objects it produces directly, as 181 // we have to used the deserialized ones that are linked together with the 182 // rest of the context snapshot. 183 Handle<JSGlobalObject> CreateNewGlobals( 184 v8::Local<v8::ObjectTemplate> global_proxy_template, 185 Handle<JSGlobalProxy> global_proxy); 186 // Hooks the given global proxy into the context. If the context was created 187 // by deserialization then this will unhook the global proxy that was 188 // deserialized, leaving the GC to pick it up. 189 void HookUpGlobalProxy(Handle<JSGlobalObject> global_object, 190 Handle<JSGlobalProxy> global_proxy); 191 // Similarly, we want to use the global that has been created by the templates 192 // passed through the API. The global from the snapshot is detached from the 193 // other objects in the snapshot. 194 void HookUpGlobalObject(Handle<JSGlobalObject> global_object); 195 // The native context has a ScriptContextTable that store declarative bindings 196 // made in script scopes. Add a "this" binding to that table pointing to the 197 // global proxy. 198 void InstallGlobalThisBinding(); 199 // New context initialization. Used for creating a context from scratch. 200 void InitializeGlobal(Handle<JSGlobalObject> global_object, 201 Handle<JSFunction> empty_function, 202 GlobalContextType context_type); 203 void InitializeExperimentalGlobal(); 204 // Depending on the situation, expose and/or get rid of the utils object. 205 void ConfigureUtilsObject(GlobalContextType context_type); 206 207 #define DECLARE_FEATURE_INITIALIZATION(id, descr) \ 208 void InitializeGlobal_##id(); 209 210 HARMONY_INPROGRESS(DECLARE_FEATURE_INITIALIZATION) 211 HARMONY_STAGED(DECLARE_FEATURE_INITIALIZATION) 212 HARMONY_SHIPPING(DECLARE_FEATURE_INITIALIZATION) 213 #undef DECLARE_FEATURE_INITIALIZATION 214 215 Handle<JSFunction> InstallArrayBuffer(Handle<JSObject> target, 216 const char* name, Builtins::Name call, 217 BuiltinFunctionId id); 218 Handle<JSFunction> InstallInternalArray(Handle<JSObject> target, 219 const char* name, 220 ElementsKind elements_kind); 221 bool InstallNatives(GlobalContextType context_type); 222 223 void InstallTypedArray(const char* name, ElementsKind elements_kind, 224 Handle<JSFunction>* fun); 225 bool InstallExperimentalNatives(); 226 bool InstallExtraNatives(); 227 bool InstallExperimentalExtraNatives(); 228 bool InstallDebuggerNatives(); 229 void InstallBuiltinFunctionIds(); 230 void InstallExperimentalBuiltinFunctionIds(); 231 void InitializeNormalizedMapCaches(); 232 233 enum ExtensionTraversalState { 234 UNVISITED, VISITED, INSTALLED 235 }; 236 237 class ExtensionStates { 238 public: 239 ExtensionStates(); 240 ExtensionTraversalState get_state(RegisteredExtension* extension); 241 void set_state(RegisteredExtension* extension, 242 ExtensionTraversalState state); 243 private: 244 base::HashMap map_; 245 DISALLOW_COPY_AND_ASSIGN(ExtensionStates); 246 }; 247 248 // Used both for deserialized and from-scratch contexts to add the extensions 249 // provided. 250 static bool InstallExtensions(Handle<Context> native_context, 251 v8::ExtensionConfiguration* extensions); 252 static bool InstallAutoExtensions(Isolate* isolate, 253 ExtensionStates* extension_states); 254 static bool InstallRequestedExtensions(Isolate* isolate, 255 v8::ExtensionConfiguration* extensions, 256 ExtensionStates* extension_states); 257 static bool InstallExtension(Isolate* isolate, 258 const char* name, 259 ExtensionStates* extension_states); 260 static bool InstallExtension(Isolate* isolate, 261 v8::RegisteredExtension* current, 262 ExtensionStates* extension_states); 263 static bool InstallSpecialObjects(Handle<Context> native_context); 264 bool ConfigureApiObject(Handle<JSObject> object, 265 Handle<ObjectTemplateInfo> object_template); 266 bool ConfigureGlobalObjects( 267 v8::Local<v8::ObjectTemplate> global_proxy_template); 268 269 // Migrates all properties from the 'from' object to the 'to' 270 // object and overrides the prototype in 'to' with the one from 271 // 'from'. 272 void TransferObject(Handle<JSObject> from, Handle<JSObject> to); 273 void TransferNamedProperties(Handle<JSObject> from, Handle<JSObject> to); 274 void TransferIndexedProperties(Handle<JSObject> from, Handle<JSObject> to); 275 276 void MakeFunctionInstancePrototypeWritable(); 277 278 void SetStrictFunctionInstanceDescriptor(Handle<Map> map, 279 FunctionMode function_mode); 280 281 static bool CallUtilsFunction(Isolate* isolate, const char* name); 282 283 static bool CompileExtension(Isolate* isolate, v8::Extension* extension); 284 285 Isolate* isolate_; 286 Handle<Context> result_; 287 Handle<Context> native_context_; 288 Handle<JSGlobalProxy> global_proxy_; 289 290 // Function maps. Function maps are created initially with a read only 291 // prototype for the processing of JS builtins. Later the function maps are 292 // replaced in order to make prototype writable. These are the final, writable 293 // prototype, maps. 294 Handle<Map> sloppy_function_map_writable_prototype_; 295 Handle<Map> strict_function_map_writable_prototype_; 296 Handle<JSFunction> strict_poison_function_; 297 Handle<JSFunction> restricted_function_properties_thrower_; 298 299 BootstrapperActive active_; 300 friend class Bootstrapper; 301 }; 302 303 304 void Bootstrapper::Iterate(ObjectVisitor* v) { 305 extensions_cache_.Iterate(v); 306 v->Synchronize(VisitorSynchronization::kExtensions); 307 } 308 309 Handle<Context> Bootstrapper::CreateEnvironment( 310 MaybeHandle<JSGlobalProxy> maybe_global_proxy, 311 v8::Local<v8::ObjectTemplate> global_proxy_template, 312 v8::ExtensionConfiguration* extensions, size_t context_snapshot_index, 313 GlobalContextType context_type) { 314 HandleScope scope(isolate_); 315 Genesis genesis(isolate_, maybe_global_proxy, global_proxy_template, 316 extensions, context_snapshot_index, context_type); 317 Handle<Context> env = genesis.result(); 318 if (env.is_null() || !InstallExtensions(env, extensions)) { 319 return Handle<Context>(); 320 } 321 return scope.CloseAndEscape(env); 322 } 323 324 Handle<JSGlobalProxy> Bootstrapper::NewRemoteContext( 325 MaybeHandle<JSGlobalProxy> maybe_global_proxy, 326 v8::Local<v8::ObjectTemplate> global_proxy_template) { 327 HandleScope scope(isolate_); 328 Genesis genesis(isolate_, maybe_global_proxy, global_proxy_template); 329 Handle<JSGlobalProxy> global_proxy = genesis.global_proxy(); 330 if (global_proxy.is_null()) return Handle<JSGlobalProxy>(); 331 return scope.CloseAndEscape(global_proxy); 332 } 333 334 void Bootstrapper::DetachGlobal(Handle<Context> env) { 335 env->GetIsolate()->counters()->errors_thrown_per_context()->AddSample( 336 env->GetErrorsThrown()); 337 338 Factory* factory = env->GetIsolate()->factory(); 339 Handle<JSGlobalProxy> global_proxy(JSGlobalProxy::cast(env->global_proxy())); 340 global_proxy->set_native_context(*factory->null_value()); 341 JSObject::ForceSetPrototype(global_proxy, factory->null_value()); 342 global_proxy->map()->SetConstructor(*factory->null_value()); 343 if (FLAG_track_detached_contexts) { 344 env->GetIsolate()->AddDetachedContext(env); 345 } 346 } 347 348 namespace { 349 350 void InstallFunction(Handle<JSObject> target, Handle<Name> property_name, 351 Handle<JSFunction> function, Handle<String> function_name, 352 PropertyAttributes attributes = DONT_ENUM) { 353 JSObject::AddProperty(target, property_name, function, attributes); 354 if (target->IsJSGlobalObject()) { 355 function->shared()->set_instance_class_name(*function_name); 356 } 357 function->shared()->set_native(true); 358 } 359 360 void InstallFunction(Handle<JSObject> target, Handle<JSFunction> function, 361 Handle<Name> name, 362 PropertyAttributes attributes = DONT_ENUM) { 363 Handle<String> name_string = Name::ToFunctionName(name).ToHandleChecked(); 364 InstallFunction(target, name, function, name_string, attributes); 365 } 366 367 Handle<JSFunction> CreateFunction(Isolate* isolate, Handle<String> name, 368 InstanceType type, int instance_size, 369 MaybeHandle<JSObject> maybe_prototype, 370 Builtins::Name call, 371 bool strict_function_map = false) { 372 Factory* factory = isolate->factory(); 373 Handle<Code> call_code(isolate->builtins()->builtin(call)); 374 Handle<JSObject> prototype; 375 return maybe_prototype.ToHandle(&prototype) 376 ? factory->NewFunction(name, call_code, prototype, type, 377 instance_size, strict_function_map) 378 : factory->NewFunctionWithoutPrototype(name, call_code, 379 strict_function_map); 380 } 381 382 Handle<JSFunction> InstallFunction(Handle<JSObject> target, Handle<Name> name, 383 InstanceType type, int instance_size, 384 MaybeHandle<JSObject> maybe_prototype, 385 Builtins::Name call, 386 PropertyAttributes attributes, 387 bool strict_function_map = false) { 388 Handle<String> name_string = Name::ToFunctionName(name).ToHandleChecked(); 389 Handle<JSFunction> function = 390 CreateFunction(target->GetIsolate(), name_string, type, instance_size, 391 maybe_prototype, call, strict_function_map); 392 InstallFunction(target, name, function, name_string, attributes); 393 return function; 394 } 395 396 Handle<JSFunction> InstallFunction(Handle<JSObject> target, const char* name, 397 InstanceType type, int instance_size, 398 MaybeHandle<JSObject> maybe_prototype, 399 Builtins::Name call, 400 bool strict_function_map = false) { 401 Factory* const factory = target->GetIsolate()->factory(); 402 PropertyAttributes attributes = DONT_ENUM; 403 return InstallFunction(target, factory->InternalizeUtf8String(name), type, 404 instance_size, maybe_prototype, call, attributes, 405 strict_function_map); 406 } 407 408 Handle<JSFunction> SimpleCreateFunction(Isolate* isolate, Handle<String> name, 409 Builtins::Name call, int len, 410 bool adapt) { 411 Handle<JSFunction> fun = 412 CreateFunction(isolate, name, JS_OBJECT_TYPE, JSObject::kHeaderSize, 413 MaybeHandle<JSObject>(), call); 414 if (adapt) { 415 fun->shared()->set_internal_formal_parameter_count(len); 416 } else { 417 fun->shared()->DontAdaptArguments(); 418 } 419 fun->shared()->set_length(len); 420 return fun; 421 } 422 423 Handle<JSFunction> SimpleInstallFunction(Handle<JSObject> base, 424 Handle<String> name, 425 Builtins::Name call, int len, 426 bool adapt, 427 PropertyAttributes attrs = DONT_ENUM) { 428 Handle<JSFunction> fun = 429 SimpleCreateFunction(base->GetIsolate(), name, call, len, adapt); 430 InstallFunction(base, fun, name, attrs); 431 return fun; 432 } 433 434 Handle<JSFunction> SimpleInstallFunction(Handle<JSObject> base, 435 const char* name, Builtins::Name call, 436 int len, bool adapt, 437 PropertyAttributes attrs = DONT_ENUM) { 438 Factory* const factory = base->GetIsolate()->factory(); 439 return SimpleInstallFunction(base, factory->InternalizeUtf8String(name), call, 440 len, adapt, attrs); 441 } 442 443 Handle<JSFunction> SimpleInstallFunction(Handle<JSObject> base, 444 const char* name, Builtins::Name call, 445 int len, bool adapt, 446 BuiltinFunctionId id) { 447 Handle<JSFunction> fun = SimpleInstallFunction(base, name, call, len, adapt); 448 fun->shared()->set_builtin_function_id(id); 449 return fun; 450 } 451 452 void SimpleInstallGetterSetter(Handle<JSObject> base, Handle<String> name, 453 Builtins::Name call_getter, 454 Builtins::Name call_setter, 455 PropertyAttributes attribs) { 456 Isolate* const isolate = base->GetIsolate(); 457 458 Handle<String> getter_name = 459 Name::ToFunctionName(name, isolate->factory()->get_string()) 460 .ToHandleChecked(); 461 Handle<JSFunction> getter = 462 SimpleCreateFunction(isolate, getter_name, call_getter, 0, true); 463 getter->shared()->set_native(true); 464 465 Handle<String> setter_name = 466 Name::ToFunctionName(name, isolate->factory()->set_string()) 467 .ToHandleChecked(); 468 Handle<JSFunction> setter = 469 SimpleCreateFunction(isolate, setter_name, call_setter, 1, true); 470 setter->shared()->set_native(true); 471 472 JSObject::DefineAccessor(base, name, getter, setter, attribs).Check(); 473 } 474 475 Handle<JSFunction> SimpleInstallGetter(Handle<JSObject> base, 476 Handle<String> name, 477 Handle<Name> property_name, 478 Builtins::Name call, bool adapt) { 479 Isolate* const isolate = base->GetIsolate(); 480 481 Handle<String> getter_name = 482 Name::ToFunctionName(name, isolate->factory()->get_string()) 483 .ToHandleChecked(); 484 Handle<JSFunction> getter = 485 SimpleCreateFunction(isolate, getter_name, call, 0, adapt); 486 getter->shared()->set_native(true); 487 488 Handle<Object> setter = isolate->factory()->undefined_value(); 489 490 JSObject::DefineAccessor(base, property_name, getter, setter, DONT_ENUM) 491 .Check(); 492 493 return getter; 494 } 495 496 Handle<JSFunction> SimpleInstallGetter(Handle<JSObject> base, 497 Handle<String> name, Builtins::Name call, 498 bool adapt) { 499 return SimpleInstallGetter(base, name, name, call, adapt); 500 } 501 502 Handle<JSFunction> SimpleInstallGetter(Handle<JSObject> base, 503 Handle<String> name, Builtins::Name call, 504 bool adapt, BuiltinFunctionId id) { 505 Handle<JSFunction> fun = SimpleInstallGetter(base, name, call, adapt); 506 fun->shared()->set_builtin_function_id(id); 507 return fun; 508 } 509 510 } // namespace 511 512 Handle<JSFunction> Genesis::CreateEmptyFunction(Isolate* isolate) { 513 // Allocate the map for function instances. Maps are allocated first and their 514 // prototypes patched later, once empty function is created. 515 516 // Functions with this map will not have a 'prototype' property, and 517 // can not be used as constructors. 518 Handle<Map> function_without_prototype_map = 519 factory()->CreateSloppyFunctionMap(FUNCTION_WITHOUT_PROTOTYPE); 520 native_context()->set_sloppy_function_without_prototype_map( 521 *function_without_prototype_map); 522 523 // Allocate the function map. This map is temporary, used only for processing 524 // of builtins. 525 // Later the map is replaced with writable prototype map, allocated below. 526 Handle<Map> function_map = 527 factory()->CreateSloppyFunctionMap(FUNCTION_WITH_READONLY_PROTOTYPE); 528 native_context()->set_sloppy_function_map(*function_map); 529 native_context()->set_sloppy_function_with_readonly_prototype_map( 530 *function_map); 531 532 // The final map for functions. Writeable prototype. 533 // This map is installed in MakeFunctionInstancePrototypeWritable. 534 sloppy_function_map_writable_prototype_ = 535 factory()->CreateSloppyFunctionMap(FUNCTION_WITH_WRITEABLE_PROTOTYPE); 536 Factory* factory = isolate->factory(); 537 538 Handle<String> object_name = factory->Object_string(); 539 540 Handle<JSObject> object_function_prototype; 541 542 { // --- O b j e c t --- 543 Handle<JSFunction> object_fun = factory->NewFunction(object_name); 544 int unused = JSObject::kInitialGlobalObjectUnusedPropertiesCount; 545 int instance_size = JSObject::kHeaderSize + kPointerSize * unused; 546 Handle<Map> object_function_map = 547 factory->NewMap(JS_OBJECT_TYPE, instance_size); 548 object_function_map->SetInObjectProperties(unused); 549 JSFunction::SetInitialMap(object_fun, object_function_map, 550 isolate->factory()->null_value()); 551 object_function_map->set_unused_property_fields(unused); 552 553 native_context()->set_object_function(*object_fun); 554 555 // Allocate a new prototype for the object function. 556 object_function_prototype = 557 factory->NewJSObject(isolate->object_function(), TENURED); 558 Handle<Map> map = Map::Copy(handle(object_function_prototype->map()), 559 "EmptyObjectPrototype"); 560 map->set_is_prototype_map(true); 561 // Ban re-setting Object.prototype.__proto__ to prevent Proxy security bug 562 map->set_immutable_proto(true); 563 object_function_prototype->set_map(*map); 564 565 native_context()->set_initial_object_prototype(*object_function_prototype); 566 // For bootstrapping set the array prototype to be the same as the object 567 // prototype, otherwise the missing initial_array_prototype will cause 568 // assertions during startup. 569 native_context()->set_initial_array_prototype(*object_function_prototype); 570 Accessors::FunctionSetPrototype(object_fun, object_function_prototype) 571 .Assert(); 572 } 573 574 // Allocate the empty function as the prototype for function - ES6 19.2.3 575 Handle<Code> code(isolate->builtins()->EmptyFunction()); 576 Handle<JSFunction> empty_function = 577 factory->NewFunctionWithoutPrototype(factory->empty_string(), code); 578 579 // Allocate the function map first and then patch the prototype later 580 Handle<Map> empty_function_map = 581 factory->CreateSloppyFunctionMap(FUNCTION_WITHOUT_PROTOTYPE); 582 DCHECK(!empty_function_map->is_dictionary_map()); 583 Map::SetPrototype(empty_function_map, object_function_prototype); 584 empty_function_map->set_is_prototype_map(true); 585 586 empty_function->set_map(*empty_function_map); 587 588 // --- E m p t y --- 589 Handle<String> source = factory->NewStringFromStaticChars("() {}"); 590 Handle<Script> script = factory->NewScript(source); 591 script->set_type(Script::TYPE_NATIVE); 592 empty_function->shared()->set_start_position(0); 593 empty_function->shared()->set_end_position(source->length()); 594 empty_function->shared()->DontAdaptArguments(); 595 SharedFunctionInfo::SetScript(handle(empty_function->shared()), script); 596 597 // Set prototypes for the function maps. 598 Handle<Map> sloppy_function_map(native_context()->sloppy_function_map(), 599 isolate); 600 Handle<Map> sloppy_function_without_prototype_map( 601 native_context()->sloppy_function_without_prototype_map(), isolate); 602 Map::SetPrototype(sloppy_function_map, empty_function); 603 Map::SetPrototype(sloppy_function_without_prototype_map, empty_function); 604 Map::SetPrototype(sloppy_function_map_writable_prototype_, empty_function); 605 606 return empty_function; 607 } 608 609 610 // Creates the %ThrowTypeError% function. 611 Handle<JSFunction> Genesis::GetThrowTypeErrorIntrinsic( 612 Builtins::Name builtin_name) { 613 Handle<String> name = 614 factory()->InternalizeOneByteString(STATIC_CHAR_VECTOR("ThrowTypeError")); 615 Handle<Code> code(isolate()->builtins()->builtin(builtin_name)); 616 Handle<JSFunction> function = 617 factory()->NewFunctionWithoutPrototype(name, code, true); 618 function->shared()->DontAdaptArguments(); 619 620 // %ThrowTypeError% must not have a name property. 621 if (JSReceiver::DeleteProperty(function, factory()->name_string()) 622 .IsNothing()) { 623 DCHECK(false); 624 } 625 626 // length needs to be non configurable. 627 Handle<Object> value(Smi::FromInt(function->shared()->length()), isolate()); 628 JSObject::SetOwnPropertyIgnoreAttributes( 629 function, factory()->length_string(), value, 630 static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY)) 631 .Assert(); 632 633 if (JSObject::PreventExtensions(function, Object::THROW_ON_ERROR) 634 .IsNothing()) { 635 DCHECK(false); 636 } 637 638 return function; 639 } 640 641 642 // ECMAScript 5th Edition, 13.2.3 643 Handle<JSFunction> Genesis::GetRestrictedFunctionPropertiesThrower() { 644 if (restricted_function_properties_thrower_.is_null()) { 645 restricted_function_properties_thrower_ = GetThrowTypeErrorIntrinsic( 646 Builtins::kRestrictedFunctionPropertiesThrower); 647 } 648 return restricted_function_properties_thrower_; 649 } 650 651 652 Handle<JSFunction> Genesis::GetStrictArgumentsPoisonFunction() { 653 if (strict_poison_function_.is_null()) { 654 strict_poison_function_ = GetThrowTypeErrorIntrinsic( 655 Builtins::kRestrictedStrictArgumentsPropertiesThrower); 656 } 657 return strict_poison_function_; 658 } 659 660 661 void Genesis::CreateStrictModeFunctionMaps(Handle<JSFunction> empty) { 662 // Allocate map for the prototype-less strict mode instances. 663 Handle<Map> strict_function_without_prototype_map = 664 factory()->CreateStrictFunctionMap(FUNCTION_WITHOUT_PROTOTYPE, empty); 665 native_context()->set_strict_function_without_prototype_map( 666 *strict_function_without_prototype_map); 667 668 // Allocate map for the strict mode functions. This map is temporary, used 669 // only for processing of builtins. 670 // Later the map is replaced with writable prototype map, allocated below. 671 Handle<Map> strict_function_map = factory()->CreateStrictFunctionMap( 672 FUNCTION_WITH_READONLY_PROTOTYPE, empty); 673 native_context()->set_strict_function_map(*strict_function_map); 674 675 // The final map for the strict mode functions. Writeable prototype. 676 // This map is installed in MakeFunctionInstancePrototypeWritable. 677 strict_function_map_writable_prototype_ = factory()->CreateStrictFunctionMap( 678 FUNCTION_WITH_WRITEABLE_PROTOTYPE, empty); 679 680 // Now that the strict mode function map is available, set up the 681 // restricted "arguments" and "caller" getters. 682 AddRestrictedFunctionProperties(empty); 683 } 684 685 void Genesis::CreateIteratorMaps(Handle<JSFunction> empty) { 686 // Create iterator-related meta-objects. 687 Handle<JSObject> iterator_prototype = 688 factory()->NewJSObject(isolate()->object_function(), TENURED); 689 690 Handle<JSFunction> iterator_prototype_iterator = SimpleCreateFunction( 691 isolate(), factory()->NewStringFromAsciiChecked("[Symbol.iterator]"), 692 Builtins::kIteratorPrototypeIterator, 0, true); 693 iterator_prototype_iterator->shared()->set_native(true); 694 695 JSObject::AddProperty(iterator_prototype, factory()->iterator_symbol(), 696 iterator_prototype_iterator, DONT_ENUM); 697 native_context()->set_initial_iterator_prototype(*iterator_prototype); 698 699 Handle<JSObject> generator_object_prototype = 700 factory()->NewJSObject(isolate()->object_function(), TENURED); 701 native_context()->set_initial_generator_prototype( 702 *generator_object_prototype); 703 JSObject::ForceSetPrototype(generator_object_prototype, iterator_prototype); 704 Handle<JSObject> generator_function_prototype = 705 factory()->NewJSObject(isolate()->object_function(), TENURED); 706 JSObject::ForceSetPrototype(generator_function_prototype, empty); 707 708 JSObject::AddProperty( 709 generator_function_prototype, factory()->to_string_tag_symbol(), 710 factory()->NewStringFromAsciiChecked("GeneratorFunction"), 711 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 712 JSObject::AddProperty(generator_function_prototype, 713 factory()->prototype_string(), 714 generator_object_prototype, 715 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 716 717 JSObject::AddProperty(generator_object_prototype, 718 factory()->constructor_string(), 719 generator_function_prototype, 720 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 721 JSObject::AddProperty(generator_object_prototype, 722 factory()->to_string_tag_symbol(), 723 factory()->NewStringFromAsciiChecked("Generator"), 724 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 725 SimpleInstallFunction(generator_object_prototype, "next", 726 Builtins::kGeneratorPrototypeNext, 1, true); 727 SimpleInstallFunction(generator_object_prototype, "return", 728 Builtins::kGeneratorPrototypeReturn, 1, true); 729 SimpleInstallFunction(generator_object_prototype, "throw", 730 Builtins::kGeneratorPrototypeThrow, 1, true); 731 732 // Internal version of generator_prototype_next, flagged as non-native. 733 Handle<JSFunction> generator_next_internal = 734 SimpleCreateFunction(isolate(), factory()->next_string(), 735 Builtins::kGeneratorPrototypeNext, 1, true); 736 native_context()->set_generator_next_internal(*generator_next_internal); 737 738 // Create maps for generator functions and their prototypes. Store those 739 // maps in the native context. The "prototype" property descriptor is 740 // writable, non-enumerable, and non-configurable (as per ES6 draft 741 // 04-14-15, section 25.2.4.3). 742 Handle<Map> strict_function_map(strict_function_map_writable_prototype_); 743 // Generator functions do not have "caller" or "arguments" accessors. 744 Handle<Map> sloppy_generator_function_map = 745 Map::Copy(strict_function_map, "SloppyGeneratorFunction"); 746 sloppy_generator_function_map->set_is_constructor(false); 747 Map::SetPrototype(sloppy_generator_function_map, 748 generator_function_prototype); 749 native_context()->set_sloppy_generator_function_map( 750 *sloppy_generator_function_map); 751 752 Handle<Map> strict_generator_function_map = 753 Map::Copy(strict_function_map, "StrictGeneratorFunction"); 754 strict_generator_function_map->set_is_constructor(false); 755 Map::SetPrototype(strict_generator_function_map, 756 generator_function_prototype); 757 native_context()->set_strict_generator_function_map( 758 *strict_generator_function_map); 759 760 Handle<JSFunction> object_function(native_context()->object_function()); 761 Handle<Map> generator_object_prototype_map = Map::Create(isolate(), 0); 762 Map::SetPrototype(generator_object_prototype_map, generator_object_prototype); 763 native_context()->set_generator_object_prototype_map( 764 *generator_object_prototype_map); 765 } 766 767 void Genesis::CreateAsyncFunctionMaps(Handle<JSFunction> empty) { 768 // %AsyncFunctionPrototype% intrinsic 769 Handle<JSObject> async_function_prototype = 770 factory()->NewJSObject(isolate()->object_function(), TENURED); 771 JSObject::ForceSetPrototype(async_function_prototype, empty); 772 773 JSObject::AddProperty(async_function_prototype, 774 factory()->to_string_tag_symbol(), 775 factory()->NewStringFromAsciiChecked("AsyncFunction"), 776 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 777 778 Handle<Map> strict_function_map( 779 native_context()->strict_function_without_prototype_map()); 780 Handle<Map> sloppy_async_function_map = 781 Map::Copy(strict_function_map, "SloppyAsyncFunction"); 782 sloppy_async_function_map->set_is_constructor(false); 783 Map::SetPrototype(sloppy_async_function_map, async_function_prototype); 784 native_context()->set_sloppy_async_function_map(*sloppy_async_function_map); 785 786 Handle<Map> strict_async_function_map = 787 Map::Copy(strict_function_map, "StrictAsyncFunction"); 788 strict_async_function_map->set_is_constructor(false); 789 Map::SetPrototype(strict_async_function_map, async_function_prototype); 790 native_context()->set_strict_async_function_map(*strict_async_function_map); 791 } 792 793 void Genesis::CreateJSProxyMaps() { 794 // Allocate the different maps for all Proxy types. 795 // Next to the default proxy, we need maps indicating callable and 796 // constructable proxies. 797 Handle<Map> proxy_function_map = 798 Map::Copy(isolate()->sloppy_function_without_prototype_map(), "Proxy"); 799 proxy_function_map->set_is_constructor(true); 800 native_context()->set_proxy_function_map(*proxy_function_map); 801 802 Handle<Map> proxy_map = 803 factory()->NewMap(JS_PROXY_TYPE, JSProxy::kSize, FAST_ELEMENTS); 804 proxy_map->set_dictionary_map(true); 805 native_context()->set_proxy_map(*proxy_map); 806 807 Handle<Map> proxy_callable_map = Map::Copy(proxy_map, "callable Proxy"); 808 proxy_callable_map->set_is_callable(); 809 native_context()->set_proxy_callable_map(*proxy_callable_map); 810 proxy_callable_map->SetConstructor(native_context()->function_function()); 811 812 Handle<Map> proxy_constructor_map = 813 Map::Copy(proxy_callable_map, "constructor Proxy"); 814 proxy_constructor_map->set_is_constructor(true); 815 native_context()->set_proxy_constructor_map(*proxy_constructor_map); 816 } 817 818 static void ReplaceAccessors(Handle<Map> map, 819 Handle<String> name, 820 PropertyAttributes attributes, 821 Handle<AccessorPair> accessor_pair) { 822 DescriptorArray* descriptors = map->instance_descriptors(); 823 int idx = descriptors->SearchWithCache(map->GetIsolate(), *name, *map); 824 AccessorConstantDescriptor descriptor(name, accessor_pair, attributes); 825 descriptors->Replace(idx, &descriptor); 826 } 827 828 void Genesis::AddRestrictedFunctionProperties(Handle<JSFunction> empty) { 829 PropertyAttributes rw_attribs = static_cast<PropertyAttributes>(DONT_ENUM); 830 Handle<JSFunction> thrower = GetRestrictedFunctionPropertiesThrower(); 831 Handle<AccessorPair> accessors = factory()->NewAccessorPair(); 832 accessors->set_getter(*thrower); 833 accessors->set_setter(*thrower); 834 835 Handle<Map> map(empty->map()); 836 ReplaceAccessors(map, factory()->arguments_string(), rw_attribs, accessors); 837 ReplaceAccessors(map, factory()->caller_string(), rw_attribs, accessors); 838 } 839 840 841 static void AddToWeakNativeContextList(Context* context) { 842 DCHECK(context->IsNativeContext()); 843 Isolate* isolate = context->GetIsolate(); 844 Heap* heap = isolate->heap(); 845 #ifdef DEBUG 846 { // NOLINT 847 DCHECK(context->next_context_link()->IsUndefined(isolate)); 848 // Check that context is not in the list yet. 849 for (Object* current = heap->native_contexts_list(); 850 !current->IsUndefined(isolate); 851 current = Context::cast(current)->next_context_link()) { 852 DCHECK(current != context); 853 } 854 } 855 #endif 856 context->set(Context::NEXT_CONTEXT_LINK, heap->native_contexts_list(), 857 UPDATE_WEAK_WRITE_BARRIER); 858 heap->set_native_contexts_list(context); 859 } 860 861 862 void Genesis::CreateRoots() { 863 // Allocate the native context FixedArray first and then patch the 864 // closure and extension object later (we need the empty function 865 // and the global object, but in order to create those, we need the 866 // native context). 867 native_context_ = factory()->NewNativeContext(); 868 AddToWeakNativeContextList(*native_context()); 869 isolate()->set_context(*native_context()); 870 871 // Allocate the message listeners object. 872 { 873 Handle<TemplateList> list = TemplateList::New(isolate(), 1); 874 native_context()->set_message_listeners(*list); 875 } 876 } 877 878 879 void Genesis::InstallGlobalThisBinding() { 880 Handle<ScriptContextTable> script_contexts( 881 native_context()->script_context_table()); 882 Handle<ScopeInfo> scope_info = ScopeInfo::CreateGlobalThisBinding(isolate()); 883 Handle<JSFunction> closure(native_context()->closure()); 884 Handle<Context> context = factory()->NewScriptContext(closure, scope_info); 885 886 // Go ahead and hook it up while we're at it. 887 int slot = scope_info->ReceiverContextSlotIndex(); 888 DCHECK_EQ(slot, Context::MIN_CONTEXT_SLOTS); 889 context->set(slot, native_context()->global_proxy()); 890 891 Handle<ScriptContextTable> new_script_contexts = 892 ScriptContextTable::Extend(script_contexts, context); 893 native_context()->set_script_context_table(*new_script_contexts); 894 } 895 896 897 Handle<JSGlobalObject> Genesis::CreateNewGlobals( 898 v8::Local<v8::ObjectTemplate> global_proxy_template, 899 Handle<JSGlobalProxy> global_proxy) { 900 // The argument global_proxy_template aka data is an ObjectTemplateInfo. 901 // It has a constructor pointer that points at global_constructor which is a 902 // FunctionTemplateInfo. 903 // The global_proxy_constructor is used to (re)initialize the 904 // global_proxy. The global_proxy_constructor also has a prototype_template 905 // pointer that points at js_global_object_template which is an 906 // ObjectTemplateInfo. 907 // That in turn has a constructor pointer that points at 908 // js_global_object_constructor which is a FunctionTemplateInfo. 909 // js_global_object_constructor is used to make js_global_object_function 910 // js_global_object_function is used to make the new global_object. 911 // 912 // --- G l o b a l --- 913 // Step 1: Create a fresh JSGlobalObject. 914 Handle<JSFunction> js_global_object_function; 915 Handle<ObjectTemplateInfo> js_global_object_template; 916 if (!global_proxy_template.IsEmpty()) { 917 // Get prototype template of the global_proxy_template. 918 Handle<ObjectTemplateInfo> data = 919 v8::Utils::OpenHandle(*global_proxy_template); 920 Handle<FunctionTemplateInfo> global_constructor = 921 Handle<FunctionTemplateInfo>( 922 FunctionTemplateInfo::cast(data->constructor())); 923 Handle<Object> proto_template(global_constructor->prototype_template(), 924 isolate()); 925 if (!proto_template->IsUndefined(isolate())) { 926 js_global_object_template = 927 Handle<ObjectTemplateInfo>::cast(proto_template); 928 } 929 } 930 931 if (js_global_object_template.is_null()) { 932 Handle<String> name = Handle<String>(heap()->empty_string()); 933 Handle<Code> code = isolate()->builtins()->Illegal(); 934 Handle<JSObject> prototype = 935 factory()->NewFunctionPrototype(isolate()->object_function()); 936 js_global_object_function = factory()->NewFunction( 937 name, code, prototype, JS_GLOBAL_OBJECT_TYPE, JSGlobalObject::kSize); 938 #ifdef DEBUG 939 LookupIterator it(prototype, factory()->constructor_string(), 940 LookupIterator::OWN_SKIP_INTERCEPTOR); 941 Handle<Object> value = Object::GetProperty(&it).ToHandleChecked(); 942 DCHECK(it.IsFound()); 943 DCHECK_EQ(*isolate()->object_function(), *value); 944 #endif 945 } else { 946 Handle<FunctionTemplateInfo> js_global_object_constructor( 947 FunctionTemplateInfo::cast(js_global_object_template->constructor())); 948 js_global_object_function = ApiNatives::CreateApiFunction( 949 isolate(), js_global_object_constructor, factory()->the_hole_value(), 950 ApiNatives::GlobalObjectType); 951 } 952 953 js_global_object_function->initial_map()->set_is_prototype_map(true); 954 js_global_object_function->initial_map()->set_dictionary_map(true); 955 Handle<JSGlobalObject> global_object = 956 factory()->NewJSGlobalObject(js_global_object_function); 957 958 // Step 2: (re)initialize the global proxy object. 959 Handle<JSFunction> global_proxy_function; 960 if (global_proxy_template.IsEmpty()) { 961 Handle<String> name = Handle<String>(heap()->empty_string()); 962 Handle<Code> code = isolate()->builtins()->Illegal(); 963 global_proxy_function = 964 factory()->NewFunction(name, code, JS_GLOBAL_PROXY_TYPE, 965 JSGlobalProxy::SizeWithInternalFields(0)); 966 } else { 967 Handle<ObjectTemplateInfo> data = 968 v8::Utils::OpenHandle(*global_proxy_template); 969 Handle<FunctionTemplateInfo> global_constructor( 970 FunctionTemplateInfo::cast(data->constructor())); 971 global_proxy_function = ApiNatives::CreateApiFunction( 972 isolate(), global_constructor, factory()->the_hole_value(), 973 ApiNatives::GlobalProxyType); 974 } 975 Handle<String> global_name = factory()->global_string(); 976 global_proxy_function->shared()->set_instance_class_name(*global_name); 977 global_proxy_function->initial_map()->set_is_access_check_needed(true); 978 global_proxy_function->initial_map()->set_has_hidden_prototype(true); 979 980 // Set global_proxy.__proto__ to js_global after ConfigureGlobalObjects 981 // Return the global proxy. 982 983 factory()->ReinitializeJSGlobalProxy(global_proxy, global_proxy_function); 984 return global_object; 985 } 986 987 988 void Genesis::HookUpGlobalProxy(Handle<JSGlobalObject> global_object, 989 Handle<JSGlobalProxy> global_proxy) { 990 // Set the native context for the global object. 991 global_object->set_native_context(*native_context()); 992 global_object->set_global_proxy(*global_proxy); 993 global_proxy->set_native_context(*native_context()); 994 // If we deserialized the context, the global proxy is already 995 // correctly set up. Otherwise it's undefined. 996 DCHECK(native_context() 997 ->get(Context::GLOBAL_PROXY_INDEX) 998 ->IsUndefined(isolate()) || 999 native_context()->global_proxy() == *global_proxy); 1000 native_context()->set_global_proxy(*global_proxy); 1001 } 1002 1003 1004 void Genesis::HookUpGlobalObject(Handle<JSGlobalObject> global_object) { 1005 Handle<JSGlobalObject> global_object_from_snapshot( 1006 JSGlobalObject::cast(native_context()->extension())); 1007 native_context()->set_extension(*global_object); 1008 native_context()->set_security_token(*global_object); 1009 1010 TransferNamedProperties(global_object_from_snapshot, global_object); 1011 TransferIndexedProperties(global_object_from_snapshot, global_object); 1012 } 1013 1014 static void InstallWithIntrinsicDefaultProto(Isolate* isolate, 1015 Handle<JSFunction> function, 1016 int context_index) { 1017 Handle<Smi> index(Smi::FromInt(context_index), isolate); 1018 JSObject::AddProperty( 1019 function, isolate->factory()->native_context_index_symbol(), index, NONE); 1020 isolate->native_context()->set(context_index, *function); 1021 } 1022 1023 static void InstallError(Isolate* isolate, Handle<JSObject> global, 1024 Handle<String> name, int context_index) { 1025 Factory* factory = isolate->factory(); 1026 1027 Handle<JSFunction> error_fun = 1028 InstallFunction(global, name, JS_ERROR_TYPE, JSObject::kHeaderSize, 1029 isolate->initial_object_prototype(), 1030 Builtins::kErrorConstructor, DONT_ENUM); 1031 error_fun->shared()->set_instance_class_name(*factory->Error_string()); 1032 error_fun->shared()->DontAdaptArguments(); 1033 error_fun->shared()->set_construct_stub( 1034 *isolate->builtins()->ErrorConstructor()); 1035 error_fun->shared()->set_length(1); 1036 1037 if (context_index == Context::ERROR_FUNCTION_INDEX) { 1038 SimpleInstallFunction(error_fun, "captureStackTrace", 1039 Builtins::kErrorCaptureStackTrace, 2, false); 1040 } 1041 1042 InstallWithIntrinsicDefaultProto(isolate, error_fun, context_index); 1043 1044 { 1045 Handle<JSObject> prototype = 1046 factory->NewJSObject(isolate->object_function(), TENURED); 1047 1048 JSObject::AddProperty(prototype, factory->name_string(), name, DONT_ENUM); 1049 JSObject::AddProperty(prototype, factory->message_string(), 1050 factory->empty_string(), DONT_ENUM); 1051 JSObject::AddProperty(prototype, factory->constructor_string(), error_fun, 1052 DONT_ENUM); 1053 1054 if (context_index == Context::ERROR_FUNCTION_INDEX) { 1055 Handle<JSFunction> to_string_fun = 1056 SimpleInstallFunction(prototype, factory->toString_string(), 1057 Builtins::kErrorPrototypeToString, 0, true); 1058 isolate->native_context()->set_error_to_string(*to_string_fun); 1059 } else { 1060 DCHECK(isolate->native_context()->error_to_string()->IsJSFunction()); 1061 1062 InstallFunction(prototype, isolate->error_to_string(), 1063 factory->toString_string(), DONT_ENUM); 1064 1065 Handle<JSFunction> global_error = isolate->error_function(); 1066 CHECK(JSReceiver::SetPrototype(error_fun, global_error, false, 1067 Object::THROW_ON_ERROR) 1068 .FromMaybe(false)); 1069 CHECK(JSReceiver::SetPrototype(prototype, 1070 handle(global_error->prototype(), isolate), 1071 false, Object::THROW_ON_ERROR) 1072 .FromMaybe(false)); 1073 } 1074 1075 Accessors::FunctionSetPrototype(error_fun, prototype).Assert(); 1076 } 1077 1078 Handle<Map> initial_map(error_fun->initial_map()); 1079 Map::EnsureDescriptorSlack(initial_map, 1); 1080 1081 PropertyAttributes attribs = DONT_ENUM; 1082 Handle<AccessorInfo> error_stack = 1083 Accessors::ErrorStackInfo(isolate, attribs); 1084 { 1085 AccessorConstantDescriptor d(Handle<Name>(Name::cast(error_stack->name())), 1086 error_stack, attribs); 1087 initial_map->AppendDescriptor(&d); 1088 } 1089 } 1090 1091 static void InstallMakeError(Isolate* isolate, Handle<Code> code, 1092 int context_index) { 1093 Handle<JSFunction> function = 1094 isolate->factory()->NewFunction(isolate->factory()->empty_string(), code, 1095 JS_OBJECT_TYPE, JSObject::kHeaderSize); 1096 function->shared()->DontAdaptArguments(); 1097 isolate->native_context()->set(context_index, *function); 1098 } 1099 1100 // This is only called if we are not using snapshots. The equivalent 1101 // work in the snapshot case is done in HookUpGlobalObject. 1102 void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object, 1103 Handle<JSFunction> empty_function, 1104 GlobalContextType context_type) { 1105 // --- N a t i v e C o n t e x t --- 1106 // Use the empty function as closure (no scope info). 1107 native_context()->set_closure(*empty_function); 1108 native_context()->set_previous(NULL); 1109 // Set extension and global object. 1110 native_context()->set_extension(*global_object); 1111 // Security setup: Set the security token of the native context to the global 1112 // object. This makes the security check between two different contexts fail 1113 // by default even in case of global object reinitialization. 1114 native_context()->set_security_token(*global_object); 1115 1116 Isolate* isolate = global_object->GetIsolate(); 1117 Factory* factory = isolate->factory(); 1118 1119 Handle<ScriptContextTable> script_context_table = 1120 factory->NewScriptContextTable(); 1121 native_context()->set_script_context_table(*script_context_table); 1122 InstallGlobalThisBinding(); 1123 1124 { // --- O b j e c t --- 1125 Handle<String> object_name = factory->Object_string(); 1126 Handle<JSFunction> object_function = isolate->object_function(); 1127 JSObject::AddProperty(global_object, object_name, object_function, 1128 DONT_ENUM); 1129 1130 SimpleInstallFunction(object_function, factory->assign_string(), 1131 Builtins::kObjectAssign, 2, false); 1132 SimpleInstallFunction(object_function, factory->create_string(), 1133 Builtins::kObjectCreate, 2, true); 1134 SimpleInstallFunction(object_function, "getOwnPropertyDescriptor", 1135 Builtins::kObjectGetOwnPropertyDescriptor, 2, false); 1136 SimpleInstallFunction(object_function, 1137 factory->getOwnPropertyDescriptors_string(), 1138 Builtins::kObjectGetOwnPropertyDescriptors, 1, false); 1139 SimpleInstallFunction(object_function, "getOwnPropertyNames", 1140 Builtins::kObjectGetOwnPropertyNames, 1, false); 1141 SimpleInstallFunction(object_function, "getOwnPropertySymbols", 1142 Builtins::kObjectGetOwnPropertySymbols, 1, false); 1143 SimpleInstallFunction(object_function, "is", 1144 Builtins::kObjectIs, 2, true); 1145 SimpleInstallFunction(object_function, "preventExtensions", 1146 Builtins::kObjectPreventExtensions, 1, false); 1147 SimpleInstallFunction(object_function, "seal", 1148 Builtins::kObjectSeal, 1, false); 1149 1150 Handle<JSFunction> object_define_properties = SimpleInstallFunction( 1151 object_function, "defineProperties", 1152 Builtins::kObjectDefineProperties, 2, true); 1153 native_context()->set_object_define_properties(*object_define_properties); 1154 1155 Handle<JSFunction> object_define_property = SimpleInstallFunction( 1156 object_function, factory->defineProperty_string(), 1157 Builtins::kObjectDefineProperty, 3, true); 1158 native_context()->set_object_define_property(*object_define_property); 1159 1160 Handle<JSFunction> object_freeze = SimpleInstallFunction( 1161 object_function, "freeze", Builtins::kObjectFreeze, 1, false); 1162 native_context()->set_object_freeze(*object_freeze); 1163 1164 Handle<JSFunction> object_get_prototype_of = SimpleInstallFunction( 1165 object_function, "getPrototypeOf", Builtins::kObjectGetPrototypeOf, 1166 1, false); 1167 native_context()->set_object_get_prototype_of(*object_get_prototype_of); 1168 SimpleInstallFunction(object_function, "setPrototypeOf", 1169 Builtins::kObjectSetPrototypeOf, 2, false); 1170 1171 Handle<JSFunction> object_is_extensible = SimpleInstallFunction( 1172 object_function, "isExtensible", Builtins::kObjectIsExtensible, 1173 1, false); 1174 native_context()->set_object_is_extensible(*object_is_extensible); 1175 1176 Handle<JSFunction> object_is_frozen = SimpleInstallFunction( 1177 object_function, "isFrozen", Builtins::kObjectIsFrozen, 1, false); 1178 native_context()->set_object_is_frozen(*object_is_frozen); 1179 1180 Handle<JSFunction> object_is_sealed = SimpleInstallFunction( 1181 object_function, "isSealed", Builtins::kObjectIsSealed, 1, false); 1182 native_context()->set_object_is_sealed(*object_is_sealed); 1183 1184 Handle<JSFunction> object_keys = SimpleInstallFunction( 1185 object_function, "keys", Builtins::kObjectKeys, 1, false); 1186 native_context()->set_object_keys(*object_keys); 1187 SimpleInstallFunction(object_function, factory->entries_string(), 1188 Builtins::kObjectEntries, 1, false); 1189 SimpleInstallFunction(object_function, factory->values_string(), 1190 Builtins::kObjectValues, 1, false); 1191 1192 SimpleInstallFunction(isolate->initial_object_prototype(), 1193 "__defineGetter__", Builtins::kObjectDefineGetter, 2, 1194 true); 1195 SimpleInstallFunction(isolate->initial_object_prototype(), 1196 "__defineSetter__", Builtins::kObjectDefineSetter, 2, 1197 true); 1198 SimpleInstallFunction(isolate->initial_object_prototype(), "hasOwnProperty", 1199 Builtins::kObjectHasOwnProperty, 1, true); 1200 SimpleInstallFunction(isolate->initial_object_prototype(), 1201 "__lookupGetter__", Builtins::kObjectLookupGetter, 1, 1202 true); 1203 SimpleInstallFunction(isolate->initial_object_prototype(), 1204 "__lookupSetter__", Builtins::kObjectLookupSetter, 1, 1205 true); 1206 SimpleInstallFunction( 1207 isolate->initial_object_prototype(), "propertyIsEnumerable", 1208 Builtins::kObjectPrototypePropertyIsEnumerable, 1, false); 1209 1210 SimpleInstallGetterSetter(isolate->initial_object_prototype(), 1211 factory->proto_string(), 1212 Builtins::kObjectPrototypeGetProto, 1213 Builtins::kObjectPrototypeSetProto, DONT_ENUM); 1214 } 1215 1216 Handle<JSObject> global(native_context()->global_object()); 1217 1218 { // --- F u n c t i o n --- 1219 Handle<JSFunction> prototype = empty_function; 1220 Handle<JSFunction> function_fun = 1221 InstallFunction(global, "Function", JS_FUNCTION_TYPE, JSFunction::kSize, 1222 prototype, Builtins::kFunctionConstructor); 1223 function_fun->set_prototype_or_initial_map( 1224 *sloppy_function_map_writable_prototype_); 1225 function_fun->shared()->DontAdaptArguments(); 1226 function_fun->shared()->SetConstructStub( 1227 *isolate->builtins()->FunctionConstructor()); 1228 function_fun->shared()->set_length(1); 1229 InstallWithIntrinsicDefaultProto(isolate, function_fun, 1230 Context::FUNCTION_FUNCTION_INDEX); 1231 1232 // Setup the methods on the %FunctionPrototype%. 1233 SimpleInstallFunction(prototype, factory->apply_string(), 1234 Builtins::kFunctionPrototypeApply, 2, false); 1235 1236 if (FLAG_minimal) { 1237 SimpleInstallFunction(prototype, factory->bind_string(), 1238 Builtins::kFunctionPrototypeBind, 1, false); 1239 } else { 1240 FastFunctionBindStub bind_stub(isolate); 1241 Handle<JSFunction> bind_function = factory->NewFunctionWithoutPrototype( 1242 factory->bind_string(), bind_stub.GetCode(), false); 1243 bind_function->shared()->DontAdaptArguments(); 1244 bind_function->shared()->set_length(1); 1245 InstallFunction(prototype, bind_function, factory->bind_string(), 1246 DONT_ENUM); 1247 } 1248 1249 SimpleInstallFunction(prototype, factory->call_string(), 1250 Builtins::kFunctionPrototypeCall, 1, false); 1251 SimpleInstallFunction(prototype, factory->toString_string(), 1252 Builtins::kFunctionPrototypeToString, 0, false); 1253 1254 // Install the @@hasInstance function. 1255 Handle<JSFunction> has_instance = InstallFunction( 1256 prototype, factory->has_instance_symbol(), JS_OBJECT_TYPE, 1257 JSObject::kHeaderSize, MaybeHandle<JSObject>(), 1258 Builtins::kFunctionPrototypeHasInstance, 1259 static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY)); 1260 has_instance->shared()->set_builtin_function_id(kFunctionHasInstance); 1261 native_context()->set_function_has_instance(*has_instance); 1262 1263 // Set the expected parameters for @@hasInstance to 1; required by builtin. 1264 has_instance->shared()->set_internal_formal_parameter_count(1); 1265 1266 // Set the length for the function to satisfy ECMA-262. 1267 has_instance->shared()->set_length(1); 1268 1269 // Install the "constructor" property on the %FunctionPrototype%. 1270 JSObject::AddProperty(prototype, factory->constructor_string(), 1271 function_fun, DONT_ENUM); 1272 1273 sloppy_function_map_writable_prototype_->SetConstructor(*function_fun); 1274 strict_function_map_writable_prototype_->SetConstructor(*function_fun); 1275 } 1276 1277 { // --- A r r a y --- 1278 Handle<JSFunction> array_function = 1279 InstallFunction(global, "Array", JS_ARRAY_TYPE, JSArray::kSize, 1280 isolate->initial_object_prototype(), 1281 Builtins::kArrayCode); 1282 array_function->shared()->DontAdaptArguments(); 1283 array_function->shared()->set_builtin_function_id(kArrayCode); 1284 1285 // This seems a bit hackish, but we need to make sure Array.length 1286 // is 1. 1287 array_function->shared()->set_length(1); 1288 1289 Handle<Map> initial_map(array_function->initial_map()); 1290 1291 // This assert protects an optimization in 1292 // HGraphBuilder::JSArrayBuilder::EmitMapCode() 1293 DCHECK(initial_map->elements_kind() == GetInitialFastElementsKind()); 1294 Map::EnsureDescriptorSlack(initial_map, 1); 1295 1296 PropertyAttributes attribs = static_cast<PropertyAttributes>( 1297 DONT_ENUM | DONT_DELETE); 1298 1299 Handle<AccessorInfo> array_length = 1300 Accessors::ArrayLengthInfo(isolate, attribs); 1301 { // Add length. 1302 AccessorConstantDescriptor d( 1303 Handle<Name>(Name::cast(array_length->name())), array_length, 1304 attribs); 1305 initial_map->AppendDescriptor(&d); 1306 } 1307 1308 InstallWithIntrinsicDefaultProto(isolate, array_function, 1309 Context::ARRAY_FUNCTION_INDEX); 1310 1311 // Cache the array maps, needed by ArrayConstructorStub 1312 CacheInitialJSArrayMaps(native_context(), initial_map); 1313 ArrayConstructorStub array_constructor_stub(isolate); 1314 Handle<Code> code = array_constructor_stub.GetCode(); 1315 array_function->shared()->SetConstructStub(*code); 1316 1317 Handle<JSFunction> is_arraylike = SimpleInstallFunction( 1318 array_function, isolate->factory()->InternalizeUtf8String("isArray"), 1319 Builtins::kArrayIsArray, 1, true); 1320 native_context()->set_is_arraylike(*is_arraylike); 1321 } 1322 1323 { // --- A r r a y I t e r a t o r --- 1324 Handle<JSObject> iterator_prototype( 1325 native_context()->initial_iterator_prototype()); 1326 1327 Handle<JSObject> array_iterator_prototype = 1328 factory->NewJSObject(isolate->object_function(), TENURED); 1329 JSObject::ForceSetPrototype(array_iterator_prototype, iterator_prototype); 1330 1331 JSObject::AddProperty( 1332 array_iterator_prototype, factory->to_string_tag_symbol(), 1333 factory->ArrayIterator_string(), 1334 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 1335 1336 Handle<JSFunction> next = InstallFunction( 1337 array_iterator_prototype, "next", JS_OBJECT_TYPE, JSObject::kHeaderSize, 1338 MaybeHandle<JSObject>(), Builtins::kArrayIteratorPrototypeNext); 1339 next->shared()->set_builtin_function_id(kArrayIteratorNext); 1340 1341 // Set the expected parameters for %ArrayIteratorPrototype%.next to 0 (not 1342 // including the receiver), as required by the builtin. 1343 next->shared()->set_internal_formal_parameter_count(0); 1344 1345 // Set the length for the function to satisfy ECMA-262. 1346 next->shared()->set_length(0); 1347 1348 Handle<JSFunction> array_iterator_function = CreateFunction( 1349 isolate, factory->ArrayIterator_string(), 1350 JS_FAST_ARRAY_VALUE_ITERATOR_TYPE, JSArrayIterator::kSize, 1351 array_iterator_prototype, Builtins::kIllegal); 1352 array_iterator_function->shared()->set_instance_class_name( 1353 isolate->heap()->ArrayIterator_string()); 1354 1355 native_context()->set_initial_array_iterator_prototype( 1356 *array_iterator_prototype); 1357 native_context()->set_initial_array_iterator_prototype_map( 1358 array_iterator_prototype->map()); 1359 1360 Handle<Map> initial_map(array_iterator_function->initial_map(), isolate); 1361 1362 #define ARRAY_ITERATOR_LIST(V) \ 1363 V(TYPED_ARRAY, KEY, typed_array, key) \ 1364 V(FAST_ARRAY, KEY, fast_array, key) \ 1365 V(GENERIC_ARRAY, KEY, array, key) \ 1366 V(UINT8_ARRAY, KEY_VALUE, uint8_array, key_value) \ 1367 V(INT8_ARRAY, KEY_VALUE, int8_array, key_value) \ 1368 V(UINT16_ARRAY, KEY_VALUE, uint16_array, key_value) \ 1369 V(INT16_ARRAY, KEY_VALUE, int16_array, key_value) \ 1370 V(UINT32_ARRAY, KEY_VALUE, uint32_array, key_value) \ 1371 V(INT32_ARRAY, KEY_VALUE, int32_array, key_value) \ 1372 V(FLOAT32_ARRAY, KEY_VALUE, float32_array, key_value) \ 1373 V(FLOAT64_ARRAY, KEY_VALUE, float64_array, key_value) \ 1374 V(UINT8_CLAMPED_ARRAY, KEY_VALUE, uint8_clamped_array, key_value) \ 1375 V(FAST_SMI_ARRAY, KEY_VALUE, fast_smi_array, key_value) \ 1376 V(FAST_HOLEY_SMI_ARRAY, KEY_VALUE, fast_holey_smi_array, key_value) \ 1377 V(FAST_ARRAY, KEY_VALUE, fast_array, key_value) \ 1378 V(FAST_HOLEY_ARRAY, KEY_VALUE, fast_holey_array, key_value) \ 1379 V(FAST_DOUBLE_ARRAY, KEY_VALUE, fast_double_array, key_value) \ 1380 V(FAST_HOLEY_DOUBLE_ARRAY, KEY_VALUE, fast_holey_double_array, key_value) \ 1381 V(GENERIC_ARRAY, KEY_VALUE, array, key_value) \ 1382 V(UINT8_ARRAY, VALUE, uint8_array, value) \ 1383 V(INT8_ARRAY, VALUE, int8_array, value) \ 1384 V(UINT16_ARRAY, VALUE, uint16_array, value) \ 1385 V(INT16_ARRAY, VALUE, int16_array, value) \ 1386 V(UINT32_ARRAY, VALUE, uint32_array, value) \ 1387 V(INT32_ARRAY, VALUE, int32_array, value) \ 1388 V(FLOAT32_ARRAY, VALUE, float32_array, value) \ 1389 V(FLOAT64_ARRAY, VALUE, float64_array, value) \ 1390 V(UINT8_CLAMPED_ARRAY, VALUE, uint8_clamped_array, value) \ 1391 V(FAST_SMI_ARRAY, VALUE, fast_smi_array, value) \ 1392 V(FAST_HOLEY_SMI_ARRAY, VALUE, fast_holey_smi_array, value) \ 1393 V(FAST_ARRAY, VALUE, fast_array, value) \ 1394 V(FAST_HOLEY_ARRAY, VALUE, fast_holey_array, value) \ 1395 V(FAST_DOUBLE_ARRAY, VALUE, fast_double_array, value) \ 1396 V(FAST_HOLEY_DOUBLE_ARRAY, VALUE, fast_holey_double_array, value) \ 1397 V(GENERIC_ARRAY, VALUE, array, value) 1398 1399 #define CREATE_ARRAY_ITERATOR_MAP(PREFIX, SUFFIX, prefix, suffix) \ 1400 do { \ 1401 const InstanceType type = JS_##PREFIX##_##SUFFIX##_ITERATOR_TYPE; \ 1402 Handle<Map> map = \ 1403 Map::Copy(initial_map, "JS_" #PREFIX "_" #SUFFIX "_ITERATOR_TYPE"); \ 1404 map->set_instance_type(type); \ 1405 native_context()->set_##prefix##_##suffix##_iterator_map(*map); \ 1406 } while (0); 1407 1408 ARRAY_ITERATOR_LIST(CREATE_ARRAY_ITERATOR_MAP) 1409 1410 #undef CREATE_ARRAY_ITERATOR_MAP 1411 #undef ARRAY_ITERATOR_LIST 1412 } 1413 1414 { // --- N u m b e r --- 1415 Handle<JSFunction> number_fun = InstallFunction( 1416 global, "Number", JS_VALUE_TYPE, JSValue::kSize, 1417 isolate->initial_object_prototype(), Builtins::kNumberConstructor); 1418 number_fun->shared()->DontAdaptArguments(); 1419 number_fun->shared()->SetConstructStub( 1420 *isolate->builtins()->NumberConstructor_ConstructStub()); 1421 number_fun->shared()->set_length(1); 1422 InstallWithIntrinsicDefaultProto(isolate, number_fun, 1423 Context::NUMBER_FUNCTION_INDEX); 1424 1425 // Create the %NumberPrototype% 1426 Handle<JSValue> prototype = 1427 Handle<JSValue>::cast(factory->NewJSObject(number_fun, TENURED)); 1428 prototype->set_value(Smi::kZero); 1429 Accessors::FunctionSetPrototype(number_fun, prototype).Assert(); 1430 1431 // Install the "constructor" property on the {prototype}. 1432 JSObject::AddProperty(prototype, factory->constructor_string(), number_fun, 1433 DONT_ENUM); 1434 1435 // Install the Number.prototype methods. 1436 SimpleInstallFunction(prototype, "toExponential", 1437 Builtins::kNumberPrototypeToExponential, 1, false); 1438 SimpleInstallFunction(prototype, "toFixed", 1439 Builtins::kNumberPrototypeToFixed, 1, false); 1440 SimpleInstallFunction(prototype, "toPrecision", 1441 Builtins::kNumberPrototypeToPrecision, 1, false); 1442 SimpleInstallFunction(prototype, "toString", 1443 Builtins::kNumberPrototypeToString, 1, false); 1444 SimpleInstallFunction(prototype, "valueOf", 1445 Builtins::kNumberPrototypeValueOf, 0, true); 1446 1447 // Install i18n fallback functions. 1448 SimpleInstallFunction(prototype, "toLocaleString", 1449 Builtins::kNumberPrototypeToLocaleString, 0, false); 1450 1451 // Install the Number functions. 1452 SimpleInstallFunction(number_fun, "isFinite", Builtins::kNumberIsFinite, 1, 1453 true); 1454 SimpleInstallFunction(number_fun, "isInteger", Builtins::kNumberIsInteger, 1455 1, true); 1456 SimpleInstallFunction(number_fun, "isNaN", Builtins::kNumberIsNaN, 1, true); 1457 SimpleInstallFunction(number_fun, "isSafeInteger", 1458 Builtins::kNumberIsSafeInteger, 1, true); 1459 1460 // Install Number.parseFloat and Global.parseFloat. 1461 Handle<JSFunction> parse_float_fun = SimpleInstallFunction( 1462 number_fun, "parseFloat", Builtins::kNumberParseFloat, 1, true); 1463 JSObject::AddProperty(global_object, 1464 factory->NewStringFromAsciiChecked("parseFloat"), 1465 parse_float_fun, DONT_ENUM); 1466 1467 // Install Number.parseInt and Global.parseInt. 1468 Handle<JSFunction> parse_int_fun = SimpleInstallFunction( 1469 number_fun, "parseInt", Builtins::kNumberParseInt, 2, true); 1470 JSObject::AddProperty(global_object, 1471 factory->NewStringFromAsciiChecked("parseInt"), 1472 parse_int_fun, DONT_ENUM); 1473 } 1474 1475 { // --- B o o l e a n --- 1476 Handle<JSFunction> boolean_fun = 1477 InstallFunction(global, "Boolean", JS_VALUE_TYPE, JSValue::kSize, 1478 isolate->initial_object_prototype(), 1479 Builtins::kBooleanConstructor); 1480 boolean_fun->shared()->DontAdaptArguments(); 1481 boolean_fun->shared()->SetConstructStub( 1482 *isolate->builtins()->BooleanConstructor_ConstructStub()); 1483 boolean_fun->shared()->set_length(1); 1484 InstallWithIntrinsicDefaultProto(isolate, boolean_fun, 1485 Context::BOOLEAN_FUNCTION_INDEX); 1486 1487 // Create the %BooleanPrototype% 1488 Handle<JSValue> prototype = 1489 Handle<JSValue>::cast(factory->NewJSObject(boolean_fun, TENURED)); 1490 prototype->set_value(isolate->heap()->false_value()); 1491 Accessors::FunctionSetPrototype(boolean_fun, prototype).Assert(); 1492 1493 // Install the "constructor" property on the {prototype}. 1494 JSObject::AddProperty(prototype, factory->constructor_string(), boolean_fun, 1495 DONT_ENUM); 1496 1497 // Install the Boolean.prototype methods. 1498 SimpleInstallFunction(prototype, "toString", 1499 Builtins::kBooleanPrototypeToString, 0, true); 1500 SimpleInstallFunction(prototype, "valueOf", 1501 Builtins::kBooleanPrototypeValueOf, 0, true); 1502 } 1503 1504 { // --- S t r i n g --- 1505 Handle<JSFunction> string_fun = InstallFunction( 1506 global, "String", JS_VALUE_TYPE, JSValue::kSize, 1507 isolate->initial_object_prototype(), Builtins::kStringConstructor); 1508 string_fun->shared()->SetConstructStub( 1509 *isolate->builtins()->StringConstructor_ConstructStub()); 1510 string_fun->shared()->DontAdaptArguments(); 1511 string_fun->shared()->set_length(1); 1512 InstallWithIntrinsicDefaultProto(isolate, string_fun, 1513 Context::STRING_FUNCTION_INDEX); 1514 1515 Handle<Map> string_map = 1516 Handle<Map>(native_context()->string_function()->initial_map()); 1517 string_map->set_elements_kind(FAST_STRING_WRAPPER_ELEMENTS); 1518 Map::EnsureDescriptorSlack(string_map, 1); 1519 1520 PropertyAttributes attribs = static_cast<PropertyAttributes>( 1521 DONT_ENUM | DONT_DELETE | READ_ONLY); 1522 Handle<AccessorInfo> string_length( 1523 Accessors::StringLengthInfo(isolate, attribs)); 1524 1525 { // Add length. 1526 AccessorConstantDescriptor d(factory->length_string(), string_length, 1527 attribs); 1528 string_map->AppendDescriptor(&d); 1529 } 1530 1531 // Install the String.fromCharCode function. 1532 SimpleInstallFunction(string_fun, "fromCharCode", 1533 Builtins::kStringFromCharCode, 1, false); 1534 1535 // Install the String.fromCodePoint function. 1536 SimpleInstallFunction(string_fun, "fromCodePoint", 1537 Builtins::kStringFromCodePoint, 1, false); 1538 1539 // Create the %StringPrototype% 1540 Handle<JSValue> prototype = 1541 Handle<JSValue>::cast(factory->NewJSObject(string_fun, TENURED)); 1542 prototype->set_value(isolate->heap()->empty_string()); 1543 Accessors::FunctionSetPrototype(string_fun, prototype).Assert(); 1544 1545 // Install the "constructor" property on the {prototype}. 1546 JSObject::AddProperty(prototype, factory->constructor_string(), string_fun, 1547 DONT_ENUM); 1548 1549 // Install the String.prototype methods. 1550 SimpleInstallFunction(prototype, "charAt", Builtins::kStringPrototypeCharAt, 1551 1, true); 1552 SimpleInstallFunction(prototype, "charCodeAt", 1553 Builtins::kStringPrototypeCharCodeAt, 1, true); 1554 SimpleInstallFunction(prototype, "endsWith", 1555 Builtins::kStringPrototypeEndsWith, 1, false); 1556 SimpleInstallFunction(prototype, "includes", 1557 Builtins::kStringPrototypeIncludes, 1, false); 1558 SimpleInstallFunction(prototype, "indexOf", 1559 Builtins::kStringPrototypeIndexOf, 1, false); 1560 SimpleInstallFunction(prototype, "lastIndexOf", 1561 Builtins::kStringPrototypeLastIndexOf, 1, false); 1562 SimpleInstallFunction(prototype, "localeCompare", 1563 Builtins::kStringPrototypeLocaleCompare, 1, true); 1564 SimpleInstallFunction(prototype, "normalize", 1565 Builtins::kStringPrototypeNormalize, 0, false); 1566 SimpleInstallFunction(prototype, "substr", Builtins::kStringPrototypeSubstr, 1567 2, true); 1568 SimpleInstallFunction(prototype, "substring", 1569 Builtins::kStringPrototypeSubstring, 2, true); 1570 SimpleInstallFunction(prototype, "startsWith", 1571 Builtins::kStringPrototypeStartsWith, 1, false); 1572 SimpleInstallFunction(prototype, "toString", 1573 Builtins::kStringPrototypeToString, 0, true); 1574 SimpleInstallFunction(prototype, "trim", Builtins::kStringPrototypeTrim, 0, 1575 false); 1576 SimpleInstallFunction(prototype, "trimLeft", 1577 Builtins::kStringPrototypeTrimLeft, 0, false); 1578 SimpleInstallFunction(prototype, "trimRight", 1579 Builtins::kStringPrototypeTrimRight, 0, false); 1580 SimpleInstallFunction(prototype, "valueOf", 1581 Builtins::kStringPrototypeValueOf, 0, true); 1582 1583 Handle<JSFunction> iterator = SimpleCreateFunction( 1584 isolate, factory->NewStringFromAsciiChecked("[Symbol.iterator]"), 1585 Builtins::kStringPrototypeIterator, 0, true); 1586 iterator->shared()->set_native(true); 1587 iterator->shared()->set_builtin_function_id(kStringIterator); 1588 JSObject::AddProperty(prototype, factory->iterator_symbol(), iterator, 1589 static_cast<PropertyAttributes>(DONT_ENUM)); 1590 } 1591 1592 { // --- S t r i n g I t e r a t o r --- 1593 Handle<JSObject> iterator_prototype( 1594 native_context()->initial_iterator_prototype()); 1595 1596 Handle<JSObject> string_iterator_prototype = 1597 factory->NewJSObject(isolate->object_function(), TENURED); 1598 JSObject::ForceSetPrototype(string_iterator_prototype, iterator_prototype); 1599 1600 JSObject::AddProperty( 1601 string_iterator_prototype, factory->to_string_tag_symbol(), 1602 factory->NewStringFromAsciiChecked("String Iterator"), 1603 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 1604 1605 Handle<JSFunction> next = 1606 InstallFunction(string_iterator_prototype, "next", JS_OBJECT_TYPE, 1607 JSObject::kHeaderSize, MaybeHandle<JSObject>(), 1608 Builtins::kStringIteratorPrototypeNext); 1609 next->shared()->set_builtin_function_id(kStringIteratorNext); 1610 1611 // Set the expected parameters for %StringIteratorPrototype%.next to 0 (not 1612 // including the receiver), as required by the builtin. 1613 next->shared()->set_internal_formal_parameter_count(0); 1614 1615 // Set the length for the function to satisfy ECMA-262. 1616 next->shared()->set_length(0); 1617 1618 Handle<JSFunction> string_iterator_function = CreateFunction( 1619 isolate, factory->NewStringFromAsciiChecked("StringIterator"), 1620 JS_STRING_ITERATOR_TYPE, JSStringIterator::kSize, 1621 string_iterator_prototype, Builtins::kIllegal); 1622 native_context()->set_string_iterator_map( 1623 string_iterator_function->initial_map()); 1624 } 1625 1626 { 1627 // --- S y m b o l --- 1628 Handle<JSObject> prototype = 1629 factory->NewJSObject(isolate->object_function(), TENURED); 1630 Handle<JSFunction> symbol_fun = 1631 InstallFunction(global, "Symbol", JS_VALUE_TYPE, JSValue::kSize, 1632 prototype, Builtins::kSymbolConstructor); 1633 symbol_fun->shared()->SetConstructStub( 1634 *isolate->builtins()->SymbolConstructor_ConstructStub()); 1635 symbol_fun->shared()->set_length(0); 1636 symbol_fun->shared()->DontAdaptArguments(); 1637 native_context()->set_symbol_function(*symbol_fun); 1638 1639 // Install the @@toStringTag property on the {prototype}. 1640 JSObject::AddProperty( 1641 prototype, factory->to_string_tag_symbol(), 1642 factory->NewStringFromAsciiChecked("Symbol"), 1643 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 1644 1645 // Install the "constructor" property on the {prototype}. 1646 JSObject::AddProperty(prototype, factory->constructor_string(), symbol_fun, 1647 DONT_ENUM); 1648 1649 // Install the Symbol.prototype methods. 1650 SimpleInstallFunction(prototype, "toString", 1651 Builtins::kSymbolPrototypeToString, 0, true); 1652 SimpleInstallFunction(prototype, "valueOf", 1653 Builtins::kSymbolPrototypeValueOf, 0, true); 1654 1655 // Install the @@toPrimitive function. 1656 Handle<JSFunction> to_primitive = InstallFunction( 1657 prototype, factory->to_primitive_symbol(), JS_OBJECT_TYPE, 1658 JSObject::kHeaderSize, MaybeHandle<JSObject>(), 1659 Builtins::kSymbolPrototypeToPrimitive, 1660 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 1661 1662 // Set the expected parameters for @@toPrimitive to 1; required by builtin. 1663 to_primitive->shared()->set_internal_formal_parameter_count(1); 1664 1665 // Set the length for the function to satisfy ECMA-262. 1666 to_primitive->shared()->set_length(1); 1667 } 1668 1669 { // --- D a t e --- 1670 // Builtin functions for Date.prototype. 1671 Handle<JSObject> prototype = 1672 factory->NewJSObject(isolate->object_function(), TENURED); 1673 Handle<JSFunction> date_fun = 1674 InstallFunction(global, "Date", JS_DATE_TYPE, JSDate::kSize, prototype, 1675 Builtins::kDateConstructor); 1676 InstallWithIntrinsicDefaultProto(isolate, date_fun, 1677 Context::DATE_FUNCTION_INDEX); 1678 date_fun->shared()->SetConstructStub( 1679 *isolate->builtins()->DateConstructor_ConstructStub()); 1680 date_fun->shared()->set_length(7); 1681 date_fun->shared()->DontAdaptArguments(); 1682 1683 // Install the Date.now, Date.parse and Date.UTC functions. 1684 SimpleInstallFunction(date_fun, "now", Builtins::kDateNow, 0, false); 1685 SimpleInstallFunction(date_fun, "parse", Builtins::kDateParse, 1, false); 1686 SimpleInstallFunction(date_fun, "UTC", Builtins::kDateUTC, 7, false); 1687 1688 // Install the "constructor" property on the {prototype}. 1689 JSObject::AddProperty(prototype, factory->constructor_string(), date_fun, 1690 DONT_ENUM); 1691 1692 // Install the Date.prototype methods. 1693 SimpleInstallFunction(prototype, "toString", 1694 Builtins::kDatePrototypeToString, 0, false); 1695 SimpleInstallFunction(prototype, "toDateString", 1696 Builtins::kDatePrototypeToDateString, 0, false); 1697 SimpleInstallFunction(prototype, "toTimeString", 1698 Builtins::kDatePrototypeToTimeString, 0, false); 1699 SimpleInstallFunction(prototype, "toISOString", 1700 Builtins::kDatePrototypeToISOString, 0, false); 1701 Handle<JSFunction> to_utc_string = 1702 SimpleInstallFunction(prototype, "toUTCString", 1703 Builtins::kDatePrototypeToUTCString, 0, false); 1704 InstallFunction(prototype, to_utc_string, 1705 factory->InternalizeUtf8String("toGMTString"), DONT_ENUM); 1706 SimpleInstallFunction(prototype, "getDate", Builtins::kDatePrototypeGetDate, 1707 0, true); 1708 SimpleInstallFunction(prototype, "setDate", Builtins::kDatePrototypeSetDate, 1709 1, false); 1710 SimpleInstallFunction(prototype, "getDay", Builtins::kDatePrototypeGetDay, 1711 0, true); 1712 SimpleInstallFunction(prototype, "getFullYear", 1713 Builtins::kDatePrototypeGetFullYear, 0, true); 1714 SimpleInstallFunction(prototype, "setFullYear", 1715 Builtins::kDatePrototypeSetFullYear, 3, false); 1716 SimpleInstallFunction(prototype, "getHours", 1717 Builtins::kDatePrototypeGetHours, 0, true); 1718 SimpleInstallFunction(prototype, "setHours", 1719 Builtins::kDatePrototypeSetHours, 4, false); 1720 SimpleInstallFunction(prototype, "getMilliseconds", 1721 Builtins::kDatePrototypeGetMilliseconds, 0, true); 1722 SimpleInstallFunction(prototype, "setMilliseconds", 1723 Builtins::kDatePrototypeSetMilliseconds, 1, false); 1724 SimpleInstallFunction(prototype, "getMinutes", 1725 Builtins::kDatePrototypeGetMinutes, 0, true); 1726 SimpleInstallFunction(prototype, "setMinutes", 1727 Builtins::kDatePrototypeSetMinutes, 3, false); 1728 SimpleInstallFunction(prototype, "getMonth", 1729 Builtins::kDatePrototypeGetMonth, 0, true); 1730 SimpleInstallFunction(prototype, "setMonth", 1731 Builtins::kDatePrototypeSetMonth, 2, false); 1732 SimpleInstallFunction(prototype, "getSeconds", 1733 Builtins::kDatePrototypeGetSeconds, 0, true); 1734 SimpleInstallFunction(prototype, "setSeconds", 1735 Builtins::kDatePrototypeSetSeconds, 2, false); 1736 SimpleInstallFunction(prototype, "getTime", Builtins::kDatePrototypeGetTime, 1737 0, true); 1738 SimpleInstallFunction(prototype, "setTime", Builtins::kDatePrototypeSetTime, 1739 1, false); 1740 SimpleInstallFunction(prototype, "getTimezoneOffset", 1741 Builtins::kDatePrototypeGetTimezoneOffset, 0, true); 1742 SimpleInstallFunction(prototype, "getUTCDate", 1743 Builtins::kDatePrototypeGetUTCDate, 0, true); 1744 SimpleInstallFunction(prototype, "setUTCDate", 1745 Builtins::kDatePrototypeSetUTCDate, 1, false); 1746 SimpleInstallFunction(prototype, "getUTCDay", 1747 Builtins::kDatePrototypeGetUTCDay, 0, true); 1748 SimpleInstallFunction(prototype, "getUTCFullYear", 1749 Builtins::kDatePrototypeGetUTCFullYear, 0, true); 1750 SimpleInstallFunction(prototype, "setUTCFullYear", 1751 Builtins::kDatePrototypeSetUTCFullYear, 3, false); 1752 SimpleInstallFunction(prototype, "getUTCHours", 1753 Builtins::kDatePrototypeGetUTCHours, 0, true); 1754 SimpleInstallFunction(prototype, "setUTCHours", 1755 Builtins::kDatePrototypeSetUTCHours, 4, false); 1756 SimpleInstallFunction(prototype, "getUTCMilliseconds", 1757 Builtins::kDatePrototypeGetUTCMilliseconds, 0, true); 1758 SimpleInstallFunction(prototype, "setUTCMilliseconds", 1759 Builtins::kDatePrototypeSetUTCMilliseconds, 1, false); 1760 SimpleInstallFunction(prototype, "getUTCMinutes", 1761 Builtins::kDatePrototypeGetUTCMinutes, 0, true); 1762 SimpleInstallFunction(prototype, "setUTCMinutes", 1763 Builtins::kDatePrototypeSetUTCMinutes, 3, false); 1764 SimpleInstallFunction(prototype, "getUTCMonth", 1765 Builtins::kDatePrototypeGetUTCMonth, 0, true); 1766 SimpleInstallFunction(prototype, "setUTCMonth", 1767 Builtins::kDatePrototypeSetUTCMonth, 2, false); 1768 SimpleInstallFunction(prototype, "getUTCSeconds", 1769 Builtins::kDatePrototypeGetUTCSeconds, 0, true); 1770 SimpleInstallFunction(prototype, "setUTCSeconds", 1771 Builtins::kDatePrototypeSetUTCSeconds, 2, false); 1772 SimpleInstallFunction(prototype, "valueOf", Builtins::kDatePrototypeValueOf, 1773 0, false); 1774 SimpleInstallFunction(prototype, "getYear", Builtins::kDatePrototypeGetYear, 1775 0, true); 1776 SimpleInstallFunction(prototype, "setYear", Builtins::kDatePrototypeSetYear, 1777 1, false); 1778 SimpleInstallFunction(prototype, "toJSON", Builtins::kDatePrototypeToJson, 1779 1, false); 1780 1781 // Install i18n fallback functions. 1782 SimpleInstallFunction(prototype, "toLocaleString", 1783 Builtins::kDatePrototypeToString, 0, false); 1784 SimpleInstallFunction(prototype, "toLocaleDateString", 1785 Builtins::kDatePrototypeToDateString, 0, false); 1786 SimpleInstallFunction(prototype, "toLocaleTimeString", 1787 Builtins::kDatePrototypeToTimeString, 0, false); 1788 1789 // Install the @@toPrimitive function. 1790 Handle<JSFunction> to_primitive = InstallFunction( 1791 prototype, factory->to_primitive_symbol(), JS_OBJECT_TYPE, 1792 JSObject::kHeaderSize, MaybeHandle<JSObject>(), 1793 Builtins::kDatePrototypeToPrimitive, 1794 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 1795 1796 // Set the expected parameters for @@toPrimitive to 1; required by builtin. 1797 to_primitive->shared()->set_internal_formal_parameter_count(1); 1798 1799 // Set the length for the function to satisfy ECMA-262. 1800 to_primitive->shared()->set_length(1); 1801 } 1802 1803 { // -- R e g E x p 1804 // Builtin functions for RegExp.prototype. 1805 Handle<JSObject> prototype = 1806 factory->NewJSObject(isolate->object_function(), TENURED); 1807 Handle<JSFunction> regexp_fun = 1808 InstallFunction(global, "RegExp", JS_REGEXP_TYPE, JSRegExp::kSize, 1809 prototype, Builtins::kRegExpConstructor); 1810 InstallWithIntrinsicDefaultProto(isolate, regexp_fun, 1811 Context::REGEXP_FUNCTION_INDEX); 1812 1813 Handle<SharedFunctionInfo> shared(regexp_fun->shared(), isolate); 1814 shared->SetConstructStub(*isolate->builtins()->RegExpConstructor()); 1815 shared->set_instance_class_name(isolate->heap()->RegExp_string()); 1816 shared->DontAdaptArguments(); 1817 shared->set_length(2); 1818 1819 { 1820 // RegExp.prototype setup. 1821 1822 // Install the "constructor" property on the {prototype}. 1823 JSObject::AddProperty(prototype, factory->constructor_string(), 1824 regexp_fun, DONT_ENUM); 1825 1826 { 1827 Handle<JSFunction> fun = SimpleInstallFunction( 1828 prototype, factory->exec_string(), Builtins::kRegExpPrototypeExec, 1829 1, true, DONT_ENUM); 1830 native_context()->set_regexp_exec_function(*fun); 1831 } 1832 1833 SimpleInstallGetter(prototype, factory->flags_string(), 1834 Builtins::kRegExpPrototypeFlagsGetter, true); 1835 SimpleInstallGetter(prototype, factory->global_string(), 1836 Builtins::kRegExpPrototypeGlobalGetter, true); 1837 SimpleInstallGetter(prototype, factory->ignoreCase_string(), 1838 Builtins::kRegExpPrototypeIgnoreCaseGetter, true); 1839 SimpleInstallGetter(prototype, factory->multiline_string(), 1840 Builtins::kRegExpPrototypeMultilineGetter, true); 1841 SimpleInstallGetter(prototype, factory->source_string(), 1842 Builtins::kRegExpPrototypeSourceGetter, false); 1843 SimpleInstallGetter(prototype, factory->sticky_string(), 1844 Builtins::kRegExpPrototypeStickyGetter, true); 1845 SimpleInstallGetter(prototype, factory->unicode_string(), 1846 Builtins::kRegExpPrototypeUnicodeGetter, true); 1847 1848 SimpleInstallFunction(prototype, "compile", 1849 Builtins::kRegExpPrototypeCompile, 2, false, 1850 DONT_ENUM); 1851 SimpleInstallFunction(prototype, factory->toString_string(), 1852 Builtins::kRegExpPrototypeToString, 0, false, 1853 DONT_ENUM); 1854 SimpleInstallFunction(prototype, "test", Builtins::kRegExpPrototypeTest, 1855 1, true, DONT_ENUM); 1856 1857 { 1858 Handle<JSFunction> fun = SimpleCreateFunction( 1859 isolate, factory->InternalizeUtf8String("[Symbol.match]"), 1860 Builtins::kRegExpPrototypeMatch, 1, false); 1861 InstallFunction(prototype, fun, factory->match_symbol(), DONT_ENUM); 1862 } 1863 1864 { 1865 Handle<JSFunction> fun = SimpleCreateFunction( 1866 isolate, factory->InternalizeUtf8String("[Symbol.replace]"), 1867 Builtins::kRegExpPrototypeReplace, 2, true); 1868 InstallFunction(prototype, fun, factory->replace_symbol(), DONT_ENUM); 1869 } 1870 1871 { 1872 Handle<JSFunction> fun = SimpleCreateFunction( 1873 isolate, factory->InternalizeUtf8String("[Symbol.search]"), 1874 Builtins::kRegExpPrototypeSearch, 1, true); 1875 InstallFunction(prototype, fun, factory->search_symbol(), DONT_ENUM); 1876 } 1877 1878 { 1879 Handle<JSFunction> fun = SimpleCreateFunction( 1880 isolate, factory->InternalizeUtf8String("[Symbol.split]"), 1881 Builtins::kRegExpPrototypeSplit, 2, false); 1882 InstallFunction(prototype, fun, factory->split_symbol(), DONT_ENUM); 1883 } 1884 1885 // Store the initial RegExp.prototype map. This is used in fast-path 1886 // checks. Do not alter the prototype after this point. 1887 native_context()->set_regexp_prototype_map(prototype->map()); 1888 } 1889 1890 { 1891 // RegExp getters and setters. 1892 1893 SimpleInstallGetter(regexp_fun, 1894 factory->InternalizeUtf8String("[Symbol.species]"), 1895 factory->species_symbol(), 1896 Builtins::kRegExpPrototypeSpeciesGetter, false); 1897 1898 // Static properties set by a successful match. 1899 1900 const PropertyAttributes no_enum = DONT_ENUM; 1901 SimpleInstallGetterSetter(regexp_fun, factory->input_string(), 1902 Builtins::kRegExpInputGetter, 1903 Builtins::kRegExpInputSetter, no_enum); 1904 SimpleInstallGetterSetter( 1905 regexp_fun, factory->InternalizeUtf8String("$_"), 1906 Builtins::kRegExpInputGetter, Builtins::kRegExpInputSetter, no_enum); 1907 1908 SimpleInstallGetterSetter( 1909 regexp_fun, factory->InternalizeUtf8String("lastMatch"), 1910 Builtins::kRegExpLastMatchGetter, Builtins::kEmptyFunction, no_enum); 1911 SimpleInstallGetterSetter( 1912 regexp_fun, factory->InternalizeUtf8String("$&"), 1913 Builtins::kRegExpLastMatchGetter, Builtins::kEmptyFunction, no_enum); 1914 1915 SimpleInstallGetterSetter( 1916 regexp_fun, factory->InternalizeUtf8String("lastParen"), 1917 Builtins::kRegExpLastParenGetter, Builtins::kEmptyFunction, no_enum); 1918 SimpleInstallGetterSetter( 1919 regexp_fun, factory->InternalizeUtf8String("$+"), 1920 Builtins::kRegExpLastParenGetter, Builtins::kEmptyFunction, no_enum); 1921 1922 SimpleInstallGetterSetter(regexp_fun, 1923 factory->InternalizeUtf8String("leftContext"), 1924 Builtins::kRegExpLeftContextGetter, 1925 Builtins::kEmptyFunction, no_enum); 1926 SimpleInstallGetterSetter(regexp_fun, 1927 factory->InternalizeUtf8String("$`"), 1928 Builtins::kRegExpLeftContextGetter, 1929 Builtins::kEmptyFunction, no_enum); 1930 1931 SimpleInstallGetterSetter(regexp_fun, 1932 factory->InternalizeUtf8String("rightContext"), 1933 Builtins::kRegExpRightContextGetter, 1934 Builtins::kEmptyFunction, no_enum); 1935 SimpleInstallGetterSetter(regexp_fun, 1936 factory->InternalizeUtf8String("$'"), 1937 Builtins::kRegExpRightContextGetter, 1938 Builtins::kEmptyFunction, no_enum); 1939 1940 #define INSTALL_CAPTURE_GETTER(i) \ 1941 SimpleInstallGetterSetter( \ 1942 regexp_fun, factory->InternalizeUtf8String("$" #i), \ 1943 Builtins::kRegExpCapture##i##Getter, Builtins::kEmptyFunction, no_enum) 1944 INSTALL_CAPTURE_GETTER(1); 1945 INSTALL_CAPTURE_GETTER(2); 1946 INSTALL_CAPTURE_GETTER(3); 1947 INSTALL_CAPTURE_GETTER(4); 1948 INSTALL_CAPTURE_GETTER(5); 1949 INSTALL_CAPTURE_GETTER(6); 1950 INSTALL_CAPTURE_GETTER(7); 1951 INSTALL_CAPTURE_GETTER(8); 1952 INSTALL_CAPTURE_GETTER(9); 1953 #undef INSTALL_CAPTURE_GETTER 1954 } 1955 1956 DCHECK(regexp_fun->has_initial_map()); 1957 Handle<Map> initial_map(regexp_fun->initial_map()); 1958 1959 DCHECK_EQ(0, initial_map->GetInObjectProperties()); 1960 1961 Map::EnsureDescriptorSlack(initial_map, 1); 1962 1963 // ECMA-262, section 15.10.7.5. 1964 PropertyAttributes writable = 1965 static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE); 1966 DataDescriptor field(factory->lastIndex_string(), 1967 JSRegExp::kLastIndexFieldIndex, writable, 1968 Representation::Tagged()); 1969 initial_map->AppendDescriptor(&field); 1970 1971 static const int num_fields = JSRegExp::kInObjectFieldCount; 1972 initial_map->SetInObjectProperties(num_fields); 1973 initial_map->set_unused_property_fields(0); 1974 initial_map->set_instance_size(initial_map->instance_size() + 1975 num_fields * kPointerSize); 1976 1977 { // Internal: RegExpInternalMatch 1978 Handle<JSFunction> function = 1979 factory->NewFunction(isolate->factory()->empty_string(), 1980 isolate->builtins()->RegExpInternalMatch(), 1981 JS_OBJECT_TYPE, JSObject::kHeaderSize); 1982 function->shared()->set_internal_formal_parameter_count(2); 1983 function->shared()->set_length(2); 1984 function->shared()->set_native(true); 1985 native_context()->set(Context::REGEXP_INTERNAL_MATCH, *function); 1986 } 1987 1988 // Create the last match info. One for external use, and one for internal 1989 // use when we don't want to modify the externally visible match info. 1990 Handle<RegExpMatchInfo> last_match_info = factory->NewRegExpMatchInfo(); 1991 native_context()->set_regexp_last_match_info(*last_match_info); 1992 Handle<RegExpMatchInfo> internal_match_info = factory->NewRegExpMatchInfo(); 1993 native_context()->set_regexp_internal_match_info(*internal_match_info); 1994 } 1995 1996 { // -- E r r o r 1997 InstallError(isolate, global, factory->Error_string(), 1998 Context::ERROR_FUNCTION_INDEX); 1999 InstallMakeError(isolate, isolate->builtins()->MakeError(), 2000 Context::MAKE_ERROR_INDEX); 2001 } 2002 2003 { // -- E v a l E r r o r 2004 InstallError(isolate, global, factory->EvalError_string(), 2005 Context::EVAL_ERROR_FUNCTION_INDEX); 2006 } 2007 2008 { // -- R a n g e E r r o r 2009 InstallError(isolate, global, factory->RangeError_string(), 2010 Context::RANGE_ERROR_FUNCTION_INDEX); 2011 InstallMakeError(isolate, isolate->builtins()->MakeRangeError(), 2012 Context::MAKE_RANGE_ERROR_INDEX); 2013 } 2014 2015 { // -- R e f e r e n c e E r r o r 2016 InstallError(isolate, global, factory->ReferenceError_string(), 2017 Context::REFERENCE_ERROR_FUNCTION_INDEX); 2018 } 2019 2020 { // -- S y n t a x E r r o r 2021 InstallError(isolate, global, factory->SyntaxError_string(), 2022 Context::SYNTAX_ERROR_FUNCTION_INDEX); 2023 InstallMakeError(isolate, isolate->builtins()->MakeSyntaxError(), 2024 Context::MAKE_SYNTAX_ERROR_INDEX); 2025 } 2026 2027 { // -- T y p e E r r o r 2028 InstallError(isolate, global, factory->TypeError_string(), 2029 Context::TYPE_ERROR_FUNCTION_INDEX); 2030 InstallMakeError(isolate, isolate->builtins()->MakeTypeError(), 2031 Context::MAKE_TYPE_ERROR_INDEX); 2032 } 2033 2034 { // -- U R I E r r o r 2035 InstallError(isolate, global, factory->URIError_string(), 2036 Context::URI_ERROR_FUNCTION_INDEX); 2037 InstallMakeError(isolate, isolate->builtins()->MakeURIError(), 2038 Context::MAKE_URI_ERROR_INDEX); 2039 } 2040 2041 { // -- C o m p i l e E r r o r 2042 Handle<JSObject> dummy = factory->NewJSObject(isolate->object_function()); 2043 InstallError(isolate, dummy, factory->CompileError_string(), 2044 Context::WASM_COMPILE_ERROR_FUNCTION_INDEX); 2045 2046 // -- R u n t i m e E r r o r 2047 InstallError(isolate, dummy, factory->RuntimeError_string(), 2048 Context::WASM_RUNTIME_ERROR_FUNCTION_INDEX); 2049 } 2050 2051 // Initialize the embedder data slot. 2052 Handle<FixedArray> embedder_data = factory->NewFixedArray(3); 2053 native_context()->set_embedder_data(*embedder_data); 2054 2055 { // -- J S O N 2056 Handle<String> name = factory->InternalizeUtf8String("JSON"); 2057 Handle<JSFunction> cons = factory->NewFunction(name); 2058 JSFunction::SetInstancePrototype(cons, 2059 Handle<Object>(native_context()->initial_object_prototype(), isolate)); 2060 Handle<JSObject> json_object = factory->NewJSObject(cons, TENURED); 2061 DCHECK(json_object->IsJSObject()); 2062 JSObject::AddProperty(global, name, json_object, DONT_ENUM); 2063 SimpleInstallFunction(json_object, "parse", Builtins::kJsonParse, 2, false); 2064 SimpleInstallFunction(json_object, "stringify", Builtins::kJsonStringify, 3, 2065 true); 2066 JSObject::AddProperty( 2067 json_object, factory->to_string_tag_symbol(), 2068 factory->NewStringFromAsciiChecked("JSON"), 2069 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 2070 } 2071 2072 { // -- M a t h 2073 Handle<String> name = factory->InternalizeUtf8String("Math"); 2074 Handle<JSFunction> cons = factory->NewFunction(name); 2075 JSFunction::SetInstancePrototype( 2076 cons, 2077 Handle<Object>(native_context()->initial_object_prototype(), isolate)); 2078 Handle<JSObject> math = factory->NewJSObject(cons, TENURED); 2079 DCHECK(math->IsJSObject()); 2080 JSObject::AddProperty(global, name, math, DONT_ENUM); 2081 SimpleInstallFunction(math, "abs", Builtins::kMathAbs, 1, true); 2082 SimpleInstallFunction(math, "acos", Builtins::kMathAcos, 1, true); 2083 SimpleInstallFunction(math, "acosh", Builtins::kMathAcosh, 1, true); 2084 SimpleInstallFunction(math, "asin", Builtins::kMathAsin, 1, true); 2085 SimpleInstallFunction(math, "asinh", Builtins::kMathAsinh, 1, true); 2086 SimpleInstallFunction(math, "atan", Builtins::kMathAtan, 1, true); 2087 SimpleInstallFunction(math, "atanh", Builtins::kMathAtanh, 1, true); 2088 SimpleInstallFunction(math, "atan2", Builtins::kMathAtan2, 2, true); 2089 SimpleInstallFunction(math, "ceil", Builtins::kMathCeil, 1, true); 2090 SimpleInstallFunction(math, "cbrt", Builtins::kMathCbrt, 1, true); 2091 SimpleInstallFunction(math, "expm1", Builtins::kMathExpm1, 1, true); 2092 SimpleInstallFunction(math, "clz32", Builtins::kMathClz32, 1, true); 2093 SimpleInstallFunction(math, "cos", Builtins::kMathCos, 1, true); 2094 SimpleInstallFunction(math, "cosh", Builtins::kMathCosh, 1, true); 2095 SimpleInstallFunction(math, "exp", Builtins::kMathExp, 1, true); 2096 Handle<JSFunction> math_floor = 2097 SimpleInstallFunction(math, "floor", Builtins::kMathFloor, 1, true); 2098 native_context()->set_math_floor(*math_floor); 2099 SimpleInstallFunction(math, "fround", Builtins::kMathFround, 1, true); 2100 SimpleInstallFunction(math, "hypot", Builtins::kMathHypot, 2, false); 2101 SimpleInstallFunction(math, "imul", Builtins::kMathImul, 2, true); 2102 SimpleInstallFunction(math, "log", Builtins::kMathLog, 1, true); 2103 SimpleInstallFunction(math, "log1p", Builtins::kMathLog1p, 1, true); 2104 SimpleInstallFunction(math, "log2", Builtins::kMathLog2, 1, true); 2105 SimpleInstallFunction(math, "log10", Builtins::kMathLog10, 1, true); 2106 SimpleInstallFunction(math, "max", Builtins::kMathMax, 2, false); 2107 SimpleInstallFunction(math, "min", Builtins::kMathMin, 2, false); 2108 Handle<JSFunction> math_pow = 2109 SimpleInstallFunction(math, "pow", Builtins::kMathPow, 2, true); 2110 native_context()->set_math_pow(*math_pow); 2111 SimpleInstallFunction(math, "random", Builtins::kMathRandom, 0, true); 2112 SimpleInstallFunction(math, "round", Builtins::kMathRound, 1, true); 2113 SimpleInstallFunction(math, "sign", Builtins::kMathSign, 1, true); 2114 SimpleInstallFunction(math, "sin", Builtins::kMathSin, 1, true); 2115 SimpleInstallFunction(math, "sinh", Builtins::kMathSinh, 1, true); 2116 SimpleInstallFunction(math, "sqrt", Builtins::kMathSqrt, 1, true); 2117 SimpleInstallFunction(math, "tan", Builtins::kMathTan, 1, true); 2118 SimpleInstallFunction(math, "tanh", Builtins::kMathTanh, 1, true); 2119 SimpleInstallFunction(math, "trunc", Builtins::kMathTrunc, 1, true); 2120 2121 // Install math constants. 2122 double const kE = base::ieee754::exp(1.0); 2123 double const kPI = 3.1415926535897932; 2124 JSObject::AddProperty( 2125 math, factory->NewStringFromAsciiChecked("E"), factory->NewNumber(kE), 2126 static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY)); 2127 JSObject::AddProperty( 2128 math, factory->NewStringFromAsciiChecked("LN10"), 2129 factory->NewNumber(base::ieee754::log(10.0)), 2130 static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY)); 2131 JSObject::AddProperty( 2132 math, factory->NewStringFromAsciiChecked("LN2"), 2133 factory->NewNumber(base::ieee754::log(2.0)), 2134 static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY)); 2135 JSObject::AddProperty( 2136 math, factory->NewStringFromAsciiChecked("LOG10E"), 2137 factory->NewNumber(base::ieee754::log10(kE)), 2138 static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY)); 2139 JSObject::AddProperty( 2140 math, factory->NewStringFromAsciiChecked("LOG2E"), 2141 factory->NewNumber(base::ieee754::log2(kE)), 2142 static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY)); 2143 JSObject::AddProperty( 2144 math, factory->NewStringFromAsciiChecked("PI"), factory->NewNumber(kPI), 2145 static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY)); 2146 JSObject::AddProperty( 2147 math, factory->NewStringFromAsciiChecked("SQRT1_2"), 2148 factory->NewNumber(std::sqrt(0.5)), 2149 static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY)); 2150 JSObject::AddProperty( 2151 math, factory->NewStringFromAsciiChecked("SQRT2"), 2152 factory->NewNumber(std::sqrt(2.0)), 2153 static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY)); 2154 JSObject::AddProperty( 2155 math, factory->to_string_tag_symbol(), 2156 factory->NewStringFromAsciiChecked("Math"), 2157 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 2158 } 2159 2160 { // -- A r r a y B u f f e r 2161 Handle<JSFunction> array_buffer_fun = InstallArrayBuffer( 2162 global, "ArrayBuffer", Builtins::kArrayBufferPrototypeGetByteLength, 2163 BuiltinFunctionId::kArrayBufferByteLength); 2164 InstallWithIntrinsicDefaultProto(isolate, array_buffer_fun, 2165 Context::ARRAY_BUFFER_FUN_INDEX); 2166 } 2167 2168 { // -- T y p e d A r r a y 2169 Handle<JSObject> prototype = 2170 factory->NewJSObject(isolate->object_function(), TENURED); 2171 native_context()->set_typed_array_prototype(*prototype); 2172 2173 Handle<JSFunction> typed_array_fun = 2174 CreateFunction(isolate, factory->InternalizeUtf8String("TypedArray"), 2175 JS_TYPED_ARRAY_TYPE, JSTypedArray::kSize, prototype, 2176 Builtins::kIllegal); 2177 2178 // Install the "constructor" property on the {prototype}. 2179 JSObject::AddProperty(prototype, factory->constructor_string(), 2180 typed_array_fun, DONT_ENUM); 2181 native_context()->set_typed_array_function(*typed_array_fun); 2182 2183 // Install the "buffer", "byteOffset", "byteLength" and "length" 2184 // getters on the {prototype}. 2185 SimpleInstallGetter(prototype, factory->buffer_string(), 2186 Builtins::kTypedArrayPrototypeBuffer, false); 2187 SimpleInstallGetter(prototype, factory->byte_length_string(), 2188 Builtins::kTypedArrayPrototypeByteLength, true, 2189 kTypedArrayByteLength); 2190 SimpleInstallGetter(prototype, factory->byte_offset_string(), 2191 Builtins::kTypedArrayPrototypeByteOffset, true, 2192 kTypedArrayByteOffset); 2193 SimpleInstallGetter(prototype, factory->length_string(), 2194 Builtins::kTypedArrayPrototypeLength, true, 2195 kTypedArrayLength); 2196 2197 // Install "keys", "values" and "entries" methods on the {prototype}. 2198 Handle<JSFunction> entries = 2199 SimpleInstallFunction(prototype, factory->entries_string(), 2200 Builtins::kTypedArrayPrototypeEntries, 0, true); 2201 entries->shared()->set_builtin_function_id(kTypedArrayEntries); 2202 2203 Handle<JSFunction> keys = 2204 SimpleInstallFunction(prototype, factory->keys_string(), 2205 Builtins::kTypedArrayPrototypeKeys, 0, true); 2206 keys->shared()->set_builtin_function_id(kTypedArrayKeys); 2207 2208 Handle<JSFunction> values = 2209 SimpleInstallFunction(prototype, factory->values_string(), 2210 Builtins::kTypedArrayPrototypeValues, 0, true); 2211 values->shared()->set_builtin_function_id(kTypedArrayValues); 2212 JSObject::AddProperty(prototype, factory->iterator_symbol(), values, 2213 DONT_ENUM); 2214 } 2215 2216 { // -- T y p e d A r r a y s 2217 #define INSTALL_TYPED_ARRAY(Type, type, TYPE, ctype, size) \ 2218 { \ 2219 Handle<JSFunction> fun; \ 2220 InstallTypedArray(#Type "Array", TYPE##_ELEMENTS, &fun); \ 2221 InstallWithIntrinsicDefaultProto(isolate, fun, \ 2222 Context::TYPE##_ARRAY_FUN_INDEX); \ 2223 } 2224 TYPED_ARRAYS(INSTALL_TYPED_ARRAY) 2225 #undef INSTALL_TYPED_ARRAY 2226 } 2227 2228 { // -- D a t a V i e w 2229 Handle<JSObject> prototype = 2230 factory->NewJSObject(isolate->object_function(), TENURED); 2231 Handle<JSFunction> data_view_fun = 2232 InstallFunction(global, "DataView", JS_DATA_VIEW_TYPE, 2233 JSDataView::kSizeWithInternalFields, prototype, 2234 Builtins::kDataViewConstructor); 2235 InstallWithIntrinsicDefaultProto(isolate, data_view_fun, 2236 Context::DATA_VIEW_FUN_INDEX); 2237 data_view_fun->shared()->SetConstructStub( 2238 *isolate->builtins()->DataViewConstructor_ConstructStub()); 2239 data_view_fun->shared()->set_length(3); 2240 data_view_fun->shared()->DontAdaptArguments(); 2241 2242 // Install the @@toStringTag property on the {prototype}. 2243 JSObject::AddProperty( 2244 prototype, factory->to_string_tag_symbol(), 2245 factory->NewStringFromAsciiChecked("DataView"), 2246 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 2247 2248 // Install the "constructor" property on the {prototype}. 2249 JSObject::AddProperty(prototype, factory->constructor_string(), 2250 data_view_fun, DONT_ENUM); 2251 2252 // Install the "buffer", "byteOffset" and "byteLength" getters 2253 // on the {prototype}. 2254 SimpleInstallGetter(prototype, factory->buffer_string(), 2255 Builtins::kDataViewPrototypeGetBuffer, false, 2256 kDataViewBuffer); 2257 SimpleInstallGetter(prototype, factory->byte_length_string(), 2258 Builtins::kDataViewPrototypeGetByteLength, false, 2259 kDataViewByteLength); 2260 SimpleInstallGetter(prototype, factory->byte_offset_string(), 2261 Builtins::kDataViewPrototypeGetByteOffset, false, 2262 kDataViewByteOffset); 2263 2264 SimpleInstallFunction(prototype, "getInt8", 2265 Builtins::kDataViewPrototypeGetInt8, 1, false); 2266 SimpleInstallFunction(prototype, "setInt8", 2267 Builtins::kDataViewPrototypeSetInt8, 2, false); 2268 SimpleInstallFunction(prototype, "getUint8", 2269 Builtins::kDataViewPrototypeGetUint8, 1, false); 2270 SimpleInstallFunction(prototype, "setUint8", 2271 Builtins::kDataViewPrototypeSetUint8, 2, false); 2272 SimpleInstallFunction(prototype, "getInt16", 2273 Builtins::kDataViewPrototypeGetInt16, 1, false); 2274 SimpleInstallFunction(prototype, "setInt16", 2275 Builtins::kDataViewPrototypeSetInt16, 2, false); 2276 SimpleInstallFunction(prototype, "getUint16", 2277 Builtins::kDataViewPrototypeGetUint16, 1, false); 2278 SimpleInstallFunction(prototype, "setUint16", 2279 Builtins::kDataViewPrototypeSetUint16, 2, false); 2280 SimpleInstallFunction(prototype, "getInt32", 2281 Builtins::kDataViewPrototypeGetInt32, 1, false); 2282 SimpleInstallFunction(prototype, "setInt32", 2283 Builtins::kDataViewPrototypeSetInt32, 2, false); 2284 SimpleInstallFunction(prototype, "getUint32", 2285 Builtins::kDataViewPrototypeGetUint32, 1, false); 2286 SimpleInstallFunction(prototype, "setUint32", 2287 Builtins::kDataViewPrototypeSetUint32, 2, false); 2288 SimpleInstallFunction(prototype, "getFloat32", 2289 Builtins::kDataViewPrototypeGetFloat32, 1, false); 2290 SimpleInstallFunction(prototype, "setFloat32", 2291 Builtins::kDataViewPrototypeSetFloat32, 2, false); 2292 SimpleInstallFunction(prototype, "getFloat64", 2293 Builtins::kDataViewPrototypeGetFloat64, 1, false); 2294 SimpleInstallFunction(prototype, "setFloat64", 2295 Builtins::kDataViewPrototypeSetFloat64, 2, false); 2296 } 2297 2298 { // -- M a p 2299 Handle<JSFunction> js_map_fun = InstallFunction( 2300 global, "Map", JS_MAP_TYPE, JSMap::kSize, 2301 isolate->initial_object_prototype(), Builtins::kIllegal); 2302 InstallWithIntrinsicDefaultProto(isolate, js_map_fun, 2303 Context::JS_MAP_FUN_INDEX); 2304 } 2305 2306 { // -- S e t 2307 Handle<JSFunction> js_set_fun = InstallFunction( 2308 global, "Set", JS_SET_TYPE, JSSet::kSize, 2309 isolate->initial_object_prototype(), Builtins::kIllegal); 2310 InstallWithIntrinsicDefaultProto(isolate, js_set_fun, 2311 Context::JS_SET_FUN_INDEX); 2312 } 2313 2314 { // -- J S M o d u l e N a m e s p a c e 2315 Handle<Map> map = 2316 factory->NewMap(JS_MODULE_NAMESPACE_TYPE, JSModuleNamespace::kSize); 2317 Map::SetPrototype(map, isolate->factory()->null_value()); 2318 Map::EnsureDescriptorSlack(map, 2); 2319 native_context()->set_js_module_namespace_map(*map); 2320 2321 { // Install @@toStringTag. 2322 PropertyAttributes attribs = 2323 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY); 2324 DataConstantDescriptor d(factory->to_string_tag_symbol(), 2325 factory->NewStringFromAsciiChecked("Module"), 2326 attribs); 2327 map->AppendDescriptor(&d); 2328 } 2329 2330 { // Install @@iterator. 2331 Handle<JSFunction> iterator = SimpleCreateFunction( 2332 isolate, factory->NewStringFromAsciiChecked("[Symbol.iterator]"), 2333 Builtins::kModuleNamespaceIterator, 0, true); 2334 iterator->shared()->set_native(true); 2335 // TODO(neis): Is this really supposed to be writable? 2336 DataConstantDescriptor d(factory->iterator_symbol(), iterator, DONT_ENUM); 2337 map->AppendDescriptor(&d); 2338 } 2339 } 2340 2341 { // -- I t e r a t o r R e s u l t 2342 Handle<Map> map = 2343 factory->NewMap(JS_OBJECT_TYPE, JSIteratorResult::kSize); 2344 Map::SetPrototype(map, isolate->initial_object_prototype()); 2345 Map::EnsureDescriptorSlack(map, 2); 2346 2347 { // value 2348 DataDescriptor d(factory->value_string(), JSIteratorResult::kValueIndex, 2349 NONE, Representation::Tagged()); 2350 map->AppendDescriptor(&d); 2351 } 2352 2353 { // done 2354 DataDescriptor d(factory->done_string(), JSIteratorResult::kDoneIndex, 2355 NONE, Representation::Tagged()); 2356 map->AppendDescriptor(&d); 2357 } 2358 2359 map->SetConstructor(native_context()->object_function()); 2360 map->SetInObjectProperties(2); 2361 native_context()->set_iterator_result_map(*map); 2362 } 2363 2364 { // -- W e a k M a p 2365 Handle<JSFunction> js_weak_map_fun = InstallFunction( 2366 global, "WeakMap", JS_WEAK_MAP_TYPE, JSWeakMap::kSize, 2367 isolate->initial_object_prototype(), Builtins::kIllegal); 2368 InstallWithIntrinsicDefaultProto(isolate, js_weak_map_fun, 2369 Context::JS_WEAK_MAP_FUN_INDEX); 2370 } 2371 2372 { // -- W e a k S e t 2373 Handle<JSFunction> js_weak_set_fun = InstallFunction( 2374 global, "WeakSet", JS_WEAK_SET_TYPE, JSWeakSet::kSize, 2375 isolate->initial_object_prototype(), Builtins::kIllegal); 2376 InstallWithIntrinsicDefaultProto(isolate, js_weak_set_fun, 2377 Context::JS_WEAK_SET_FUN_INDEX); 2378 } 2379 2380 { // -- P r o x y 2381 CreateJSProxyMaps(); 2382 2383 Handle<String> name = factory->Proxy_string(); 2384 Handle<Code> code(isolate->builtins()->ProxyConstructor()); 2385 2386 Handle<JSFunction> proxy_function = 2387 factory->NewFunction(isolate->proxy_function_map(), 2388 factory->Proxy_string(), MaybeHandle<Code>(code)); 2389 2390 JSFunction::SetInitialMap( 2391 proxy_function, Handle<Map>(native_context()->proxy_map(), isolate), 2392 factory->null_value()); 2393 2394 proxy_function->shared()->SetConstructStub( 2395 *isolate->builtins()->ProxyConstructor_ConstructStub()); 2396 proxy_function->shared()->set_internal_formal_parameter_count(2); 2397 proxy_function->shared()->set_length(2); 2398 2399 native_context()->set_proxy_function(*proxy_function); 2400 InstallFunction(global, name, proxy_function, factory->Object_string()); 2401 } 2402 2403 { // -- R e f l e c t 2404 Handle<String> reflect_string = factory->InternalizeUtf8String("Reflect"); 2405 Handle<JSObject> reflect = 2406 factory->NewJSObject(isolate->object_function(), TENURED); 2407 JSObject::AddProperty(global, reflect_string, reflect, DONT_ENUM); 2408 2409 Handle<JSFunction> define_property = 2410 SimpleInstallFunction(reflect, factory->defineProperty_string(), 2411 Builtins::kReflectDefineProperty, 3, true); 2412 native_context()->set_reflect_define_property(*define_property); 2413 2414 Handle<JSFunction> delete_property = 2415 SimpleInstallFunction(reflect, factory->deleteProperty_string(), 2416 Builtins::kReflectDeleteProperty, 2, true); 2417 native_context()->set_reflect_delete_property(*delete_property); 2418 2419 Handle<JSFunction> apply = SimpleInstallFunction( 2420 reflect, factory->apply_string(), Builtins::kReflectApply, 3, false); 2421 native_context()->set_reflect_apply(*apply); 2422 2423 Handle<JSFunction> construct = 2424 SimpleInstallFunction(reflect, factory->construct_string(), 2425 Builtins::kReflectConstruct, 2, false); 2426 native_context()->set_reflect_construct(*construct); 2427 2428 SimpleInstallFunction(reflect, factory->get_string(), Builtins::kReflectGet, 2429 2, false); 2430 SimpleInstallFunction(reflect, factory->getOwnPropertyDescriptor_string(), 2431 Builtins::kReflectGetOwnPropertyDescriptor, 2, true); 2432 SimpleInstallFunction(reflect, factory->getPrototypeOf_string(), 2433 Builtins::kReflectGetPrototypeOf, 1, true); 2434 SimpleInstallFunction(reflect, factory->has_string(), Builtins::kReflectHas, 2435 2, true); 2436 SimpleInstallFunction(reflect, factory->isExtensible_string(), 2437 Builtins::kReflectIsExtensible, 1, true); 2438 SimpleInstallFunction(reflect, factory->ownKeys_string(), 2439 Builtins::kReflectOwnKeys, 1, true); 2440 SimpleInstallFunction(reflect, factory->preventExtensions_string(), 2441 Builtins::kReflectPreventExtensions, 1, true); 2442 SimpleInstallFunction(reflect, factory->set_string(), Builtins::kReflectSet, 2443 3, false); 2444 SimpleInstallFunction(reflect, factory->setPrototypeOf_string(), 2445 Builtins::kReflectSetPrototypeOf, 2, true); 2446 } 2447 2448 { // --- B o u n d F u n c t i o n 2449 Handle<Map> map = 2450 factory->NewMap(JS_BOUND_FUNCTION_TYPE, JSBoundFunction::kSize); 2451 map->set_is_callable(); 2452 Map::SetPrototype(map, empty_function); 2453 2454 PropertyAttributes roc_attribs = 2455 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY); 2456 Map::EnsureDescriptorSlack(map, 2); 2457 2458 Handle<AccessorInfo> bound_length = 2459 Accessors::BoundFunctionLengthInfo(isolate, roc_attribs); 2460 { // length 2461 AccessorConstantDescriptor d(factory->length_string(), bound_length, 2462 roc_attribs); 2463 map->AppendDescriptor(&d); 2464 } 2465 Handle<AccessorInfo> bound_name = 2466 Accessors::BoundFunctionNameInfo(isolate, roc_attribs); 2467 { // length 2468 AccessorConstantDescriptor d(factory->name_string(), bound_name, 2469 roc_attribs); 2470 map->AppendDescriptor(&d); 2471 } 2472 map->SetInObjectProperties(0); 2473 native_context()->set_bound_function_without_constructor_map(*map); 2474 2475 map = Map::Copy(map, "IsConstructor"); 2476 map->set_is_constructor(true); 2477 native_context()->set_bound_function_with_constructor_map(*map); 2478 } 2479 2480 { // --- sloppy arguments map 2481 // Make sure we can recognize argument objects at runtime. 2482 // This is done by introducing an anonymous function with 2483 // class_name equals 'Arguments'. 2484 Handle<String> arguments_string = factory->Arguments_string(); 2485 Handle<Code> code = isolate->builtins()->Illegal(); 2486 Handle<JSFunction> function = factory->NewFunctionWithoutPrototype( 2487 arguments_string, code); 2488 function->shared()->set_instance_class_name(*arguments_string); 2489 2490 Handle<Map> map = factory->NewMap( 2491 JS_ARGUMENTS_TYPE, JSSloppyArgumentsObject::kSize, FAST_ELEMENTS); 2492 // Create the descriptor array for the arguments object. 2493 Map::EnsureDescriptorSlack(map, 2); 2494 2495 { // length 2496 DataDescriptor d(factory->length_string(), 2497 JSSloppyArgumentsObject::kLengthIndex, DONT_ENUM, 2498 Representation::Tagged()); 2499 map->AppendDescriptor(&d); 2500 } 2501 { // callee 2502 DataDescriptor d(factory->callee_string(), 2503 JSSloppyArgumentsObject::kCalleeIndex, DONT_ENUM, 2504 Representation::Tagged()); 2505 map->AppendDescriptor(&d); 2506 } 2507 // @@iterator method is added later. 2508 2509 map->SetInObjectProperties(2); 2510 native_context()->set_sloppy_arguments_map(*map); 2511 2512 DCHECK(!function->has_initial_map()); 2513 JSFunction::SetInitialMap(function, map, 2514 isolate->initial_object_prototype()); 2515 2516 DCHECK(!map->is_dictionary_map()); 2517 DCHECK(IsFastObjectElementsKind(map->elements_kind())); 2518 } 2519 2520 { // --- fast and slow aliased arguments map 2521 Handle<Map> map = isolate->sloppy_arguments_map(); 2522 map = Map::Copy(map, "FastAliasedArguments"); 2523 map->set_elements_kind(FAST_SLOPPY_ARGUMENTS_ELEMENTS); 2524 DCHECK_EQ(2, map->GetInObjectProperties()); 2525 native_context()->set_fast_aliased_arguments_map(*map); 2526 2527 map = Map::Copy(map, "SlowAliasedArguments"); 2528 map->set_elements_kind(SLOW_SLOPPY_ARGUMENTS_ELEMENTS); 2529 DCHECK_EQ(2, map->GetInObjectProperties()); 2530 native_context()->set_slow_aliased_arguments_map(*map); 2531 } 2532 2533 { // --- strict mode arguments map 2534 const PropertyAttributes attributes = 2535 static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); 2536 2537 // Create the ThrowTypeError function. 2538 Handle<AccessorPair> callee = factory->NewAccessorPair(); 2539 2540 Handle<JSFunction> poison = GetStrictArgumentsPoisonFunction(); 2541 2542 // Install the ThrowTypeError function. 2543 callee->set_getter(*poison); 2544 callee->set_setter(*poison); 2545 2546 // Create the map. Allocate one in-object field for length. 2547 Handle<Map> map = factory->NewMap( 2548 JS_ARGUMENTS_TYPE, JSStrictArgumentsObject::kSize, FAST_ELEMENTS); 2549 // Create the descriptor array for the arguments object. 2550 Map::EnsureDescriptorSlack(map, 2); 2551 2552 { // length 2553 DataDescriptor d(factory->length_string(), 2554 JSStrictArgumentsObject::kLengthIndex, DONT_ENUM, 2555 Representation::Tagged()); 2556 map->AppendDescriptor(&d); 2557 } 2558 { // callee 2559 AccessorConstantDescriptor d(factory->callee_string(), callee, 2560 attributes); 2561 map->AppendDescriptor(&d); 2562 } 2563 // @@iterator method is added later. 2564 2565 DCHECK_EQ(native_context()->object_function()->prototype(), 2566 *isolate->initial_object_prototype()); 2567 Map::SetPrototype(map, isolate->initial_object_prototype()); 2568 map->SetInObjectProperties(1); 2569 2570 // Copy constructor from the sloppy arguments boilerplate. 2571 map->SetConstructor( 2572 native_context()->sloppy_arguments_map()->GetConstructor()); 2573 2574 native_context()->set_strict_arguments_map(*map); 2575 2576 DCHECK(!map->is_dictionary_map()); 2577 DCHECK(IsFastObjectElementsKind(map->elements_kind())); 2578 } 2579 2580 { // --- context extension 2581 // Create a function for the context extension objects. 2582 Handle<Code> code = isolate->builtins()->Illegal(); 2583 Handle<JSFunction> context_extension_fun = factory->NewFunction( 2584 factory->empty_string(), code, JS_CONTEXT_EXTENSION_OBJECT_TYPE, 2585 JSObject::kHeaderSize); 2586 2587 Handle<String> name = factory->InternalizeOneByteString( 2588 STATIC_CHAR_VECTOR("context_extension")); 2589 context_extension_fun->shared()->set_instance_class_name(*name); 2590 native_context()->set_context_extension_function(*context_extension_fun); 2591 } 2592 2593 2594 { 2595 // Set up the call-as-function delegate. 2596 Handle<Code> code = isolate->builtins()->HandleApiCallAsFunction(); 2597 Handle<JSFunction> delegate = factory->NewFunction( 2598 factory->empty_string(), code, JS_OBJECT_TYPE, JSObject::kHeaderSize); 2599 native_context()->set_call_as_function_delegate(*delegate); 2600 delegate->shared()->DontAdaptArguments(); 2601 } 2602 2603 { 2604 // Set up the call-as-constructor delegate. 2605 Handle<Code> code = isolate->builtins()->HandleApiCallAsConstructor(); 2606 Handle<JSFunction> delegate = factory->NewFunction( 2607 factory->empty_string(), code, JS_OBJECT_TYPE, JSObject::kHeaderSize); 2608 native_context()->set_call_as_constructor_delegate(*delegate); 2609 delegate->shared()->DontAdaptArguments(); 2610 } 2611 } // NOLINT(readability/fn_size) 2612 2613 void Genesis::InstallTypedArray(const char* name, ElementsKind elements_kind, 2614 Handle<JSFunction>* fun) { 2615 Handle<JSObject> global = Handle<JSObject>(native_context()->global_object()); 2616 2617 Handle<JSObject> typed_array_prototype = 2618 Handle<JSObject>(isolate()->typed_array_prototype()); 2619 Handle<JSFunction> typed_array_function = 2620 Handle<JSFunction>(isolate()->typed_array_function()); 2621 2622 Handle<JSObject> prototype = 2623 factory()->NewJSObject(isolate()->object_function(), TENURED); 2624 Handle<JSFunction> result = InstallFunction( 2625 global, name, JS_TYPED_ARRAY_TYPE, JSTypedArray::kSizeWithInternalFields, 2626 prototype, Builtins::kIllegal); 2627 result->initial_map()->set_elements_kind(elements_kind); 2628 2629 CHECK(JSObject::SetPrototype(result, typed_array_function, false, 2630 Object::DONT_THROW) 2631 .FromJust()); 2632 2633 CHECK(JSObject::SetPrototype(prototype, typed_array_prototype, false, 2634 Object::DONT_THROW) 2635 .FromJust()); 2636 *fun = result; 2637 } 2638 2639 2640 void Genesis::InitializeExperimentalGlobal() { 2641 #define FEATURE_INITIALIZE_GLOBAL(id, descr) InitializeGlobal_##id(); 2642 2643 HARMONY_INPROGRESS(FEATURE_INITIALIZE_GLOBAL) 2644 HARMONY_STAGED(FEATURE_INITIALIZE_GLOBAL) 2645 HARMONY_SHIPPING(FEATURE_INITIALIZE_GLOBAL) 2646 #undef FEATURE_INITIALIZE_GLOBAL 2647 } 2648 2649 2650 bool Bootstrapper::CompileBuiltin(Isolate* isolate, int index) { 2651 Vector<const char> name = Natives::GetScriptName(index); 2652 Handle<String> source_code = 2653 isolate->bootstrapper()->SourceLookup<Natives>(index); 2654 2655 // We pass in extras_utils so that builtin code can set it up for later use 2656 // by actual extras code, compiled with CompileExtraBuiltin. 2657 Handle<Object> global = isolate->global_object(); 2658 Handle<Object> utils = isolate->natives_utils_object(); 2659 Handle<Object> extras_utils = isolate->extras_utils_object(); 2660 Handle<Object> args[] = {global, utils, extras_utils}; 2661 2662 return Bootstrapper::CompileNative(isolate, name, source_code, 2663 arraysize(args), args, NATIVES_CODE); 2664 } 2665 2666 2667 bool Bootstrapper::CompileExperimentalBuiltin(Isolate* isolate, int index) { 2668 HandleScope scope(isolate); 2669 Vector<const char> name = ExperimentalNatives::GetScriptName(index); 2670 Handle<String> source_code = 2671 isolate->bootstrapper()->SourceLookup<ExperimentalNatives>(index); 2672 Handle<Object> global = isolate->global_object(); 2673 Handle<Object> utils = isolate->natives_utils_object(); 2674 Handle<Object> args[] = {global, utils}; 2675 return Bootstrapper::CompileNative(isolate, name, source_code, 2676 arraysize(args), args, NATIVES_CODE); 2677 } 2678 2679 2680 bool Bootstrapper::CompileExtraBuiltin(Isolate* isolate, int index) { 2681 HandleScope scope(isolate); 2682 Vector<const char> name = ExtraNatives::GetScriptName(index); 2683 Handle<String> source_code = 2684 isolate->bootstrapper()->SourceLookup<ExtraNatives>(index); 2685 Handle<Object> global = isolate->global_object(); 2686 Handle<Object> binding = isolate->extras_binding_object(); 2687 Handle<Object> extras_utils = isolate->extras_utils_object(); 2688 Handle<Object> args[] = {global, binding, extras_utils}; 2689 return Bootstrapper::CompileNative(isolate, name, source_code, 2690 arraysize(args), args, EXTENSION_CODE); 2691 } 2692 2693 2694 bool Bootstrapper::CompileExperimentalExtraBuiltin(Isolate* isolate, 2695 int index) { 2696 HandleScope scope(isolate); 2697 Vector<const char> name = ExperimentalExtraNatives::GetScriptName(index); 2698 Handle<String> source_code = 2699 isolate->bootstrapper()->SourceLookup<ExperimentalExtraNatives>(index); 2700 Handle<Object> global = isolate->global_object(); 2701 Handle<Object> binding = isolate->extras_binding_object(); 2702 Handle<Object> extras_utils = isolate->extras_utils_object(); 2703 Handle<Object> args[] = {global, binding, extras_utils}; 2704 return Bootstrapper::CompileNative(isolate, name, source_code, 2705 arraysize(args), args, EXTENSION_CODE); 2706 } 2707 2708 bool Bootstrapper::CompileNative(Isolate* isolate, Vector<const char> name, 2709 Handle<String> source, int argc, 2710 Handle<Object> argv[], 2711 NativesFlag natives_flag) { 2712 SuppressDebug compiling_natives(isolate->debug()); 2713 // During genesis, the boilerplate for stack overflow won't work until the 2714 // environment has been at least partially initialized. Add a stack check 2715 // before entering JS code to catch overflow early. 2716 StackLimitCheck check(isolate); 2717 if (check.JsHasOverflowed(1 * KB)) { 2718 isolate->StackOverflow(); 2719 return false; 2720 } 2721 2722 Handle<Context> context(isolate->context()); 2723 2724 Handle<String> script_name = 2725 isolate->factory()->NewStringFromUtf8(name).ToHandleChecked(); 2726 Handle<SharedFunctionInfo> function_info = 2727 Compiler::GetSharedFunctionInfoForScript( 2728 source, script_name, 0, 0, ScriptOriginOptions(), Handle<Object>(), 2729 context, NULL, NULL, ScriptCompiler::kNoCompileOptions, natives_flag, 2730 false); 2731 if (function_info.is_null()) return false; 2732 2733 DCHECK(context->IsNativeContext()); 2734 2735 Handle<JSFunction> fun = 2736 isolate->factory()->NewFunctionFromSharedFunctionInfo(function_info, 2737 context); 2738 Handle<Object> receiver = isolate->factory()->undefined_value(); 2739 2740 // For non-extension scripts, run script to get the function wrapper. 2741 Handle<Object> wrapper; 2742 if (!Execution::Call(isolate, fun, receiver, 0, NULL).ToHandle(&wrapper)) { 2743 return false; 2744 } 2745 // Then run the function wrapper. 2746 return !Execution::Call(isolate, Handle<JSFunction>::cast(wrapper), receiver, 2747 argc, argv).is_null(); 2748 } 2749 2750 2751 bool Genesis::CallUtilsFunction(Isolate* isolate, const char* name) { 2752 Handle<JSObject> utils = 2753 Handle<JSObject>::cast(isolate->natives_utils_object()); 2754 Handle<String> name_string = 2755 isolate->factory()->NewStringFromAsciiChecked(name); 2756 Handle<Object> fun = JSObject::GetDataProperty(utils, name_string); 2757 Handle<Object> receiver = isolate->factory()->undefined_value(); 2758 Handle<Object> args[] = {utils}; 2759 return !Execution::Call(isolate, fun, receiver, 1, args).is_null(); 2760 } 2761 2762 2763 bool Genesis::CompileExtension(Isolate* isolate, v8::Extension* extension) { 2764 Factory* factory = isolate->factory(); 2765 HandleScope scope(isolate); 2766 Handle<SharedFunctionInfo> function_info; 2767 2768 Handle<String> source = 2769 isolate->factory() 2770 ->NewExternalStringFromOneByte(extension->source()) 2771 .ToHandleChecked(); 2772 DCHECK(source->IsOneByteRepresentation()); 2773 2774 // If we can't find the function in the cache, we compile a new 2775 // function and insert it into the cache. 2776 Vector<const char> name = CStrVector(extension->name()); 2777 SourceCodeCache* cache = isolate->bootstrapper()->extensions_cache(); 2778 Handle<Context> context(isolate->context()); 2779 DCHECK(context->IsNativeContext()); 2780 2781 if (!cache->Lookup(name, &function_info)) { 2782 Handle<String> script_name = 2783 factory->NewStringFromUtf8(name).ToHandleChecked(); 2784 function_info = Compiler::GetSharedFunctionInfoForScript( 2785 source, script_name, 0, 0, ScriptOriginOptions(), Handle<Object>(), 2786 context, extension, NULL, ScriptCompiler::kNoCompileOptions, 2787 EXTENSION_CODE, false); 2788 if (function_info.is_null()) return false; 2789 cache->Add(name, function_info); 2790 } 2791 2792 // Set up the function context. Conceptually, we should clone the 2793 // function before overwriting the context but since we're in a 2794 // single-threaded environment it is not strictly necessary. 2795 Handle<JSFunction> fun = 2796 factory->NewFunctionFromSharedFunctionInfo(function_info, context); 2797 2798 // Call function using either the runtime object or the global 2799 // object as the receiver. Provide no parameters. 2800 Handle<Object> receiver = isolate->global_object(); 2801 return !Execution::Call(isolate, fun, receiver, 0, NULL).is_null(); 2802 } 2803 2804 2805 static Handle<JSObject> ResolveBuiltinIdHolder(Handle<Context> native_context, 2806 const char* holder_expr) { 2807 Isolate* isolate = native_context->GetIsolate(); 2808 Factory* factory = isolate->factory(); 2809 Handle<JSGlobalObject> global(native_context->global_object()); 2810 const char* period_pos = strchr(holder_expr, '.'); 2811 if (period_pos == NULL) { 2812 return Handle<JSObject>::cast( 2813 Object::GetPropertyOrElement( 2814 global, factory->InternalizeUtf8String(holder_expr)) 2815 .ToHandleChecked()); 2816 } 2817 const char* inner = period_pos + 1; 2818 DCHECK(!strchr(inner, '.')); 2819 Vector<const char> property(holder_expr, 2820 static_cast<int>(period_pos - holder_expr)); 2821 Handle<String> property_string = factory->InternalizeUtf8String(property); 2822 DCHECK(!property_string.is_null()); 2823 Handle<JSObject> object = Handle<JSObject>::cast( 2824 JSReceiver::GetProperty(global, property_string).ToHandleChecked()); 2825 if (strcmp("prototype", inner) == 0) { 2826 Handle<JSFunction> function = Handle<JSFunction>::cast(object); 2827 return Handle<JSObject>(JSObject::cast(function->prototype())); 2828 } 2829 Handle<String> inner_string = factory->InternalizeUtf8String(inner); 2830 DCHECK(!inner_string.is_null()); 2831 Handle<Object> value = 2832 JSReceiver::GetProperty(object, inner_string).ToHandleChecked(); 2833 return Handle<JSObject>::cast(value); 2834 } 2835 2836 void Genesis::ConfigureUtilsObject(GlobalContextType context_type) { 2837 switch (context_type) { 2838 // We still need the utils object to find debug functions. 2839 case DEBUG_CONTEXT: 2840 return; 2841 // Expose the natives in global if a valid name for it is specified. 2842 case FULL_CONTEXT: { 2843 // We still need the utils object after deserialization. 2844 if (isolate()->serializer_enabled()) return; 2845 if (FLAG_expose_natives_as == NULL) break; 2846 if (strlen(FLAG_expose_natives_as) == 0) break; 2847 HandleScope scope(isolate()); 2848 Handle<String> natives_key = 2849 factory()->InternalizeUtf8String(FLAG_expose_natives_as); 2850 uint32_t dummy_index; 2851 if (natives_key->AsArrayIndex(&dummy_index)) break; 2852 Handle<Object> utils = isolate()->natives_utils_object(); 2853 Handle<JSObject> global = isolate()->global_object(); 2854 JSObject::AddProperty(global, natives_key, utils, DONT_ENUM); 2855 break; 2856 } 2857 } 2858 2859 // The utils object can be removed for cases that reach this point. 2860 native_context()->set_natives_utils_object(heap()->undefined_value()); 2861 } 2862 2863 2864 void Bootstrapper::ExportFromRuntime(Isolate* isolate, 2865 Handle<JSObject> container) { 2866 Factory* factory = isolate->factory(); 2867 HandleScope scope(isolate); 2868 Handle<Context> native_context = isolate->native_context(); 2869 #define EXPORT_PRIVATE_SYMBOL(NAME) \ 2870 Handle<String> NAME##_name = factory->NewStringFromAsciiChecked(#NAME); \ 2871 JSObject::AddProperty(container, NAME##_name, factory->NAME(), NONE); 2872 PRIVATE_SYMBOL_LIST(EXPORT_PRIVATE_SYMBOL) 2873 #undef EXPORT_PRIVATE_SYMBOL 2874 2875 #define EXPORT_PUBLIC_SYMBOL(NAME, DESCRIPTION) \ 2876 Handle<String> NAME##_name = factory->NewStringFromAsciiChecked(#NAME); \ 2877 JSObject::AddProperty(container, NAME##_name, factory->NAME(), NONE); 2878 PUBLIC_SYMBOL_LIST(EXPORT_PUBLIC_SYMBOL) 2879 WELL_KNOWN_SYMBOL_LIST(EXPORT_PUBLIC_SYMBOL) 2880 #undef EXPORT_PUBLIC_SYMBOL 2881 2882 { 2883 Handle<JSFunction> to_string = InstallFunction( 2884 container, "object_to_string", JS_OBJECT_TYPE, JSObject::kHeaderSize, 2885 MaybeHandle<JSObject>(), Builtins::kObjectProtoToString); 2886 to_string->shared()->set_internal_formal_parameter_count(0); 2887 to_string->shared()->set_length(0); 2888 native_context->set_object_to_string(*to_string); 2889 } 2890 2891 Handle<JSObject> iterator_prototype( 2892 native_context->initial_iterator_prototype()); 2893 2894 JSObject::AddProperty(container, 2895 factory->InternalizeUtf8String("IteratorPrototype"), 2896 iterator_prototype, NONE); 2897 2898 { 2899 PrototypeIterator iter(native_context->sloppy_generator_function_map()); 2900 Handle<JSObject> generator_function_prototype(iter.GetCurrent<JSObject>()); 2901 2902 JSObject::AddProperty( 2903 container, factory->InternalizeUtf8String("GeneratorFunctionPrototype"), 2904 generator_function_prototype, NONE); 2905 2906 static const bool kUseStrictFunctionMap = true; 2907 Handle<JSFunction> generator_function_function = InstallFunction( 2908 container, "GeneratorFunction", JS_FUNCTION_TYPE, JSFunction::kSize, 2909 generator_function_prototype, Builtins::kGeneratorFunctionConstructor, 2910 kUseStrictFunctionMap); 2911 generator_function_function->set_prototype_or_initial_map( 2912 native_context->sloppy_generator_function_map()); 2913 generator_function_function->shared()->DontAdaptArguments(); 2914 generator_function_function->shared()->SetConstructStub( 2915 *isolate->builtins()->GeneratorFunctionConstructor()); 2916 generator_function_function->shared()->set_length(1); 2917 InstallWithIntrinsicDefaultProto( 2918 isolate, generator_function_function, 2919 Context::GENERATOR_FUNCTION_FUNCTION_INDEX); 2920 2921 JSObject::ForceSetPrototype(generator_function_function, 2922 isolate->function_function()); 2923 JSObject::AddProperty( 2924 generator_function_prototype, factory->constructor_string(), 2925 generator_function_function, 2926 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 2927 2928 native_context->sloppy_generator_function_map()->SetConstructor( 2929 *generator_function_function); 2930 native_context->strict_generator_function_map()->SetConstructor( 2931 *generator_function_function); 2932 } 2933 2934 { // -- F i x e d A r r a y I t e r a t o r 2935 int size = JSFixedArrayIterator::kHeaderSize + 2936 JSFixedArrayIterator::kInObjectPropertyCount * kPointerSize; 2937 Handle<Map> map = factory->NewMap(JS_FIXED_ARRAY_ITERATOR_TYPE, size); 2938 Map::SetPrototype(map, iterator_prototype); 2939 Map::EnsureDescriptorSlack(map, 2940 JSFixedArrayIterator::kInObjectPropertyCount); 2941 map->SetInObjectProperties(JSFixedArrayIterator::kInObjectPropertyCount); 2942 map->SetConstructor(native_context->object_function()); 2943 2944 { // next 2945 DataDescriptor d(factory->next_string(), JSFixedArrayIterator::kNextIndex, 2946 DONT_ENUM, Representation::Tagged()); 2947 map->AppendDescriptor(&d); 2948 } 2949 2950 native_context->set_fixed_array_iterator_map(*map); 2951 } 2952 2953 { // -- S e t I t e r a t o r 2954 Handle<JSObject> set_iterator_prototype = 2955 isolate->factory()->NewJSObject(isolate->object_function(), TENURED); 2956 JSObject::ForceSetPrototype(set_iterator_prototype, iterator_prototype); 2957 Handle<JSFunction> set_iterator_function = InstallFunction( 2958 container, "SetIterator", JS_SET_ITERATOR_TYPE, JSSetIterator::kSize, 2959 set_iterator_prototype, Builtins::kIllegal); 2960 native_context->set_set_iterator_map(set_iterator_function->initial_map()); 2961 } 2962 2963 { // -- M a p I t e r a t o r 2964 Handle<JSObject> map_iterator_prototype = 2965 isolate->factory()->NewJSObject(isolate->object_function(), TENURED); 2966 JSObject::ForceSetPrototype(map_iterator_prototype, iterator_prototype); 2967 Handle<JSFunction> map_iterator_function = InstallFunction( 2968 container, "MapIterator", JS_MAP_ITERATOR_TYPE, JSMapIterator::kSize, 2969 map_iterator_prototype, Builtins::kIllegal); 2970 native_context->set_map_iterator_map(map_iterator_function->initial_map()); 2971 } 2972 2973 { // -- S c r i p t 2974 // Builtin functions for Script. 2975 Handle<JSFunction> script_fun = InstallFunction( 2976 container, "Script", JS_VALUE_TYPE, JSValue::kSize, 2977 isolate->initial_object_prototype(), Builtins::kUnsupportedThrower); 2978 Handle<JSObject> prototype = 2979 factory->NewJSObject(isolate->object_function(), TENURED); 2980 Accessors::FunctionSetPrototype(script_fun, prototype).Assert(); 2981 native_context->set_script_function(*script_fun); 2982 2983 Handle<Map> script_map = Handle<Map>(script_fun->initial_map()); 2984 Map::EnsureDescriptorSlack(script_map, 15); 2985 2986 PropertyAttributes attribs = 2987 static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); 2988 2989 Handle<AccessorInfo> script_column = 2990 Accessors::ScriptColumnOffsetInfo(isolate, attribs); 2991 { 2992 AccessorConstantDescriptor d( 2993 Handle<Name>(Name::cast(script_column->name())), script_column, 2994 attribs); 2995 script_map->AppendDescriptor(&d); 2996 } 2997 2998 Handle<AccessorInfo> script_id = Accessors::ScriptIdInfo(isolate, attribs); 2999 { 3000 AccessorConstantDescriptor d(Handle<Name>(Name::cast(script_id->name())), 3001 script_id, attribs); 3002 script_map->AppendDescriptor(&d); 3003 } 3004 3005 3006 Handle<AccessorInfo> script_name = 3007 Accessors::ScriptNameInfo(isolate, attribs); 3008 { 3009 AccessorConstantDescriptor d( 3010 Handle<Name>(Name::cast(script_name->name())), script_name, attribs); 3011 script_map->AppendDescriptor(&d); 3012 } 3013 3014 Handle<AccessorInfo> script_line = 3015 Accessors::ScriptLineOffsetInfo(isolate, attribs); 3016 { 3017 AccessorConstantDescriptor d( 3018 Handle<Name>(Name::cast(script_line->name())), script_line, attribs); 3019 script_map->AppendDescriptor(&d); 3020 } 3021 3022 Handle<AccessorInfo> script_source = 3023 Accessors::ScriptSourceInfo(isolate, attribs); 3024 { 3025 AccessorConstantDescriptor d( 3026 Handle<Name>(Name::cast(script_source->name())), script_source, 3027 attribs); 3028 script_map->AppendDescriptor(&d); 3029 } 3030 3031 Handle<AccessorInfo> script_type = 3032 Accessors::ScriptTypeInfo(isolate, attribs); 3033 { 3034 AccessorConstantDescriptor d( 3035 Handle<Name>(Name::cast(script_type->name())), script_type, attribs); 3036 script_map->AppendDescriptor(&d); 3037 } 3038 3039 Handle<AccessorInfo> script_compilation_type = 3040 Accessors::ScriptCompilationTypeInfo(isolate, attribs); 3041 { 3042 AccessorConstantDescriptor d( 3043 Handle<Name>(Name::cast(script_compilation_type->name())), 3044 script_compilation_type, attribs); 3045 script_map->AppendDescriptor(&d); 3046 } 3047 3048 Handle<AccessorInfo> script_context_data = 3049 Accessors::ScriptContextDataInfo(isolate, attribs); 3050 { 3051 AccessorConstantDescriptor d( 3052 Handle<Name>(Name::cast(script_context_data->name())), 3053 script_context_data, attribs); 3054 script_map->AppendDescriptor(&d); 3055 } 3056 3057 Handle<AccessorInfo> script_eval_from_script = 3058 Accessors::ScriptEvalFromScriptInfo(isolate, attribs); 3059 { 3060 AccessorConstantDescriptor d( 3061 Handle<Name>(Name::cast(script_eval_from_script->name())), 3062 script_eval_from_script, attribs); 3063 script_map->AppendDescriptor(&d); 3064 } 3065 3066 Handle<AccessorInfo> script_eval_from_script_position = 3067 Accessors::ScriptEvalFromScriptPositionInfo(isolate, attribs); 3068 { 3069 AccessorConstantDescriptor d( 3070 Handle<Name>(Name::cast(script_eval_from_script_position->name())), 3071 script_eval_from_script_position, attribs); 3072 script_map->AppendDescriptor(&d); 3073 } 3074 3075 Handle<AccessorInfo> script_eval_from_function_name = 3076 Accessors::ScriptEvalFromFunctionNameInfo(isolate, attribs); 3077 { 3078 AccessorConstantDescriptor d( 3079 Handle<Name>(Name::cast(script_eval_from_function_name->name())), 3080 script_eval_from_function_name, attribs); 3081 script_map->AppendDescriptor(&d); 3082 } 3083 3084 Handle<AccessorInfo> script_source_url = 3085 Accessors::ScriptSourceUrlInfo(isolate, attribs); 3086 { 3087 AccessorConstantDescriptor d( 3088 Handle<Name>(Name::cast(script_source_url->name())), 3089 script_source_url, attribs); 3090 script_map->AppendDescriptor(&d); 3091 } 3092 3093 Handle<AccessorInfo> script_source_mapping_url = 3094 Accessors::ScriptSourceMappingUrlInfo(isolate, attribs); 3095 { 3096 AccessorConstantDescriptor d( 3097 Handle<Name>(Name::cast(script_source_mapping_url->name())), 3098 script_source_mapping_url, attribs); 3099 script_map->AppendDescriptor(&d); 3100 } 3101 3102 Handle<AccessorInfo> script_is_embedder_debug_script = 3103 Accessors::ScriptIsEmbedderDebugScriptInfo(isolate, attribs); 3104 { 3105 AccessorConstantDescriptor d( 3106 Handle<Name>(Name::cast(script_is_embedder_debug_script->name())), 3107 script_is_embedder_debug_script, attribs); 3108 script_map->AppendDescriptor(&d); 3109 } 3110 3111 { 3112 PrototypeIterator iter(native_context->sloppy_async_function_map()); 3113 Handle<JSObject> async_function_prototype(iter.GetCurrent<JSObject>()); 3114 3115 static const bool kUseStrictFunctionMap = true; 3116 Handle<JSFunction> async_function_constructor = InstallFunction( 3117 container, "AsyncFunction", JS_FUNCTION_TYPE, JSFunction::kSize, 3118 async_function_prototype, Builtins::kAsyncFunctionConstructor, 3119 kUseStrictFunctionMap); 3120 async_function_constructor->shared()->DontAdaptArguments(); 3121 async_function_constructor->shared()->SetConstructStub( 3122 *isolate->builtins()->AsyncFunctionConstructor()); 3123 async_function_constructor->shared()->set_length(1); 3124 InstallWithIntrinsicDefaultProto(isolate, async_function_constructor, 3125 Context::ASYNC_FUNCTION_FUNCTION_INDEX); 3126 JSObject::ForceSetPrototype(async_function_constructor, 3127 isolate->function_function()); 3128 3129 JSObject::AddProperty( 3130 async_function_prototype, factory->constructor_string(), 3131 async_function_constructor, 3132 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 3133 3134 JSFunction::SetPrototype(async_function_constructor, 3135 async_function_prototype); 3136 3137 Handle<JSFunction> async_function_next = 3138 SimpleInstallFunction(container, "AsyncFunctionNext", 3139 Builtins::kGeneratorPrototypeNext, 1, true); 3140 Handle<JSFunction> async_function_throw = 3141 SimpleInstallFunction(container, "AsyncFunctionThrow", 3142 Builtins::kGeneratorPrototypeThrow, 1, true); 3143 async_function_next->shared()->set_native(false); 3144 async_function_throw->shared()->set_native(false); 3145 } 3146 } 3147 3148 { // -- C a l l S i t e 3149 // Builtin functions for CallSite. 3150 3151 // CallSites are a special case; the constructor is for our private use 3152 // only, therefore we set it up as a builtin that throws. Internally, we use 3153 // CallSiteUtils::Construct to create CallSite objects. 3154 3155 Handle<JSFunction> callsite_fun = InstallFunction( 3156 container, "CallSite", JS_OBJECT_TYPE, JSObject::kHeaderSize, 3157 isolate->initial_object_prototype(), Builtins::kUnsupportedThrower); 3158 callsite_fun->shared()->DontAdaptArguments(); 3159 isolate->native_context()->set_callsite_function(*callsite_fun); 3160 3161 { 3162 Handle<JSObject> proto = 3163 factory->NewJSObject(isolate->object_function(), TENURED); 3164 JSObject::AddProperty(proto, factory->constructor_string(), callsite_fun, 3165 DONT_ENUM); 3166 3167 struct FunctionInfo { 3168 const char* name; 3169 Builtins::Name id; 3170 }; 3171 3172 FunctionInfo infos[] = { 3173 {"getColumnNumber", Builtins::kCallSitePrototypeGetColumnNumber}, 3174 {"getEvalOrigin", Builtins::kCallSitePrototypeGetEvalOrigin}, 3175 {"getFileName", Builtins::kCallSitePrototypeGetFileName}, 3176 {"getFunction", Builtins::kCallSitePrototypeGetFunction}, 3177 {"getFunctionName", Builtins::kCallSitePrototypeGetFunctionName}, 3178 {"getLineNumber", Builtins::kCallSitePrototypeGetLineNumber}, 3179 {"getMethodName", Builtins::kCallSitePrototypeGetMethodName}, 3180 {"getPosition", Builtins::kCallSitePrototypeGetPosition}, 3181 {"getScriptNameOrSourceURL", 3182 Builtins::kCallSitePrototypeGetScriptNameOrSourceURL}, 3183 {"getThis", Builtins::kCallSitePrototypeGetThis}, 3184 {"getTypeName", Builtins::kCallSitePrototypeGetTypeName}, 3185 {"isConstructor", Builtins::kCallSitePrototypeIsConstructor}, 3186 {"isEval", Builtins::kCallSitePrototypeIsEval}, 3187 {"isNative", Builtins::kCallSitePrototypeIsNative}, 3188 {"isToplevel", Builtins::kCallSitePrototypeIsToplevel}, 3189 {"toString", Builtins::kCallSitePrototypeToString}}; 3190 3191 PropertyAttributes attrs = 3192 static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); 3193 3194 Handle<JSFunction> fun; 3195 for (const FunctionInfo& info : infos) { 3196 SimpleInstallFunction(proto, info.name, info.id, 0, true, attrs); 3197 } 3198 3199 Accessors::FunctionSetPrototype(callsite_fun, proto).Assert(); 3200 } 3201 } 3202 } 3203 3204 3205 void Bootstrapper::ExportExperimentalFromRuntime(Isolate* isolate, 3206 Handle<JSObject> container) { 3207 HandleScope scope(isolate); 3208 3209 #ifdef V8_I18N_SUPPORT 3210 #define INITIALIZE_FLAG(FLAG) \ 3211 { \ 3212 Handle<String> name = \ 3213 isolate->factory()->NewStringFromAsciiChecked(#FLAG); \ 3214 JSObject::AddProperty(container, name, \ 3215 isolate->factory()->ToBoolean(FLAG), NONE); \ 3216 } 3217 3218 #undef INITIALIZE_FLAG 3219 #endif 3220 } 3221 3222 3223 #define EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(id) \ 3224 void Genesis::InitializeGlobal_##id() {} 3225 3226 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_do_expressions) 3227 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_regexp_lookbehind) 3228 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_regexp_named_captures) 3229 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_regexp_property) 3230 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_function_sent) 3231 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_tailcalls) 3232 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_string_padding) 3233 #ifdef V8_I18N_SUPPORT 3234 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(datetime_format_to_parts) 3235 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(icu_case_mapping) 3236 #endif 3237 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_async_await) 3238 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_restrictive_generators) 3239 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_trailing_commas) 3240 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_class_fields) 3241 3242 void InstallPublicSymbol(Factory* factory, Handle<Context> native_context, 3243 const char* name, Handle<Symbol> value) { 3244 Handle<JSGlobalObject> global( 3245 JSGlobalObject::cast(native_context->global_object())); 3246 Handle<String> symbol_string = factory->InternalizeUtf8String("Symbol"); 3247 Handle<JSObject> symbol = Handle<JSObject>::cast( 3248 JSObject::GetProperty(global, symbol_string).ToHandleChecked()); 3249 Handle<String> name_string = factory->InternalizeUtf8String(name); 3250 PropertyAttributes attributes = 3251 static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY); 3252 JSObject::AddProperty(symbol, name_string, value, attributes); 3253 } 3254 3255 3256 void Genesis::InitializeGlobal_harmony_sharedarraybuffer() { 3257 if (!FLAG_harmony_sharedarraybuffer) return; 3258 3259 Handle<JSGlobalObject> global(native_context()->global_object()); 3260 Isolate* isolate = global->GetIsolate(); 3261 Factory* factory = isolate->factory(); 3262 3263 Handle<JSFunction> shared_array_buffer_fun = 3264 InstallArrayBuffer(global, "SharedArrayBuffer", 3265 Builtins::kSharedArrayBufferPrototypeGetByteLength, 3266 BuiltinFunctionId::kSharedArrayBufferByteLength); 3267 native_context()->set_shared_array_buffer_fun(*shared_array_buffer_fun); 3268 3269 Handle<String> name = factory->InternalizeUtf8String("Atomics"); 3270 Handle<JSFunction> cons = factory->NewFunction(name); 3271 JSFunction::SetInstancePrototype( 3272 cons, 3273 Handle<Object>(native_context()->initial_object_prototype(), isolate)); 3274 Handle<JSObject> atomics_object = factory->NewJSObject(cons, TENURED); 3275 DCHECK(atomics_object->IsJSObject()); 3276 JSObject::AddProperty(global, name, atomics_object, DONT_ENUM); 3277 3278 SimpleInstallFunction(atomics_object, factory->InternalizeUtf8String("load"), 3279 Builtins::kAtomicsLoad, 2, true); 3280 SimpleInstallFunction(atomics_object, factory->InternalizeUtf8String("store"), 3281 Builtins::kAtomicsStore, 3, true); 3282 } 3283 3284 3285 void Genesis::InitializeGlobal_harmony_simd() { 3286 if (!FLAG_harmony_simd) return; 3287 3288 Handle<JSGlobalObject> global( 3289 JSGlobalObject::cast(native_context()->global_object())); 3290 Isolate* isolate = global->GetIsolate(); 3291 Factory* factory = isolate->factory(); 3292 3293 Handle<String> name = factory->InternalizeUtf8String("SIMD"); 3294 Handle<JSFunction> cons = factory->NewFunction(name); 3295 JSFunction::SetInstancePrototype( 3296 cons, 3297 Handle<Object>(native_context()->initial_object_prototype(), isolate)); 3298 cons->shared()->set_instance_class_name(*name); 3299 Handle<JSObject> simd_object = factory->NewJSObject(cons, TENURED); 3300 DCHECK(simd_object->IsJSObject()); 3301 JSObject::AddProperty(global, name, simd_object, DONT_ENUM); 3302 3303 // Install SIMD type functions. Set the instance class names since 3304 // InstallFunction only does this when we install on the JSGlobalObject. 3305 #define SIMD128_INSTALL_FUNCTION(TYPE, Type, type, lane_count, lane_type) \ 3306 Handle<JSFunction> type##_function = InstallFunction( \ 3307 simd_object, #Type, JS_VALUE_TYPE, JSValue::kSize, \ 3308 isolate->initial_object_prototype(), Builtins::kIllegal); \ 3309 native_context()->set_##type##_function(*type##_function); \ 3310 type##_function->shared()->set_instance_class_name(*factory->Type##_string()); 3311 SIMD128_TYPES(SIMD128_INSTALL_FUNCTION) 3312 #undef SIMD128_INSTALL_FUNCTION 3313 } 3314 3315 3316 void Genesis::InitializeGlobal_harmony_array_prototype_values() { 3317 if (!FLAG_harmony_array_prototype_values) return; 3318 Handle<JSFunction> array_constructor(native_context()->array_function()); 3319 Handle<JSObject> array_prototype( 3320 JSObject::cast(array_constructor->instance_prototype())); 3321 Handle<Object> values_iterator = 3322 JSObject::GetProperty(array_prototype, factory()->iterator_symbol()) 3323 .ToHandleChecked(); 3324 DCHECK(values_iterator->IsJSFunction()); 3325 JSObject::AddProperty(array_prototype, factory()->values_string(), 3326 values_iterator, DONT_ENUM); 3327 3328 Handle<Object> unscopables = 3329 JSObject::GetProperty(array_prototype, factory()->unscopables_symbol()) 3330 .ToHandleChecked(); 3331 DCHECK(unscopables->IsJSObject()); 3332 JSObject::AddProperty(Handle<JSObject>::cast(unscopables), 3333 factory()->values_string(), factory()->true_value(), 3334 NONE); 3335 } 3336 3337 Handle<JSFunction> Genesis::InstallArrayBuffer(Handle<JSObject> target, 3338 const char* name, 3339 Builtins::Name call, 3340 BuiltinFunctionId id) { 3341 // Create the %ArrayBufferPrototype% 3342 // Setup the {prototype} with the given {name} for @@toStringTag. 3343 Handle<JSObject> prototype = 3344 factory()->NewJSObject(isolate()->object_function(), TENURED); 3345 JSObject::AddProperty(prototype, factory()->to_string_tag_symbol(), 3346 factory()->NewStringFromAsciiChecked(name), 3347 static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY)); 3348 3349 // Allocate the constructor with the given {prototype}. 3350 Handle<JSFunction> array_buffer_fun = 3351 InstallFunction(target, name, JS_ARRAY_BUFFER_TYPE, 3352 JSArrayBuffer::kSizeWithInternalFields, prototype, 3353 Builtins::kArrayBufferConstructor); 3354 array_buffer_fun->shared()->SetConstructStub( 3355 *isolate()->builtins()->ArrayBufferConstructor_ConstructStub()); 3356 array_buffer_fun->shared()->DontAdaptArguments(); 3357 array_buffer_fun->shared()->set_length(1); 3358 3359 // Install the "constructor" property on the {prototype}. 3360 JSObject::AddProperty(prototype, factory()->constructor_string(), 3361 array_buffer_fun, DONT_ENUM); 3362 3363 SimpleInstallFunction(array_buffer_fun, factory()->isView_string(), 3364 Builtins::kArrayBufferIsView, 1, true); 3365 3366 // Install the "byteLength" getter on the {prototype}. 3367 SimpleInstallGetter(prototype, factory()->byte_length_string(), call, false, 3368 id); 3369 3370 return array_buffer_fun; 3371 } 3372 3373 3374 Handle<JSFunction> Genesis::InstallInternalArray(Handle<JSObject> target, 3375 const char* name, 3376 ElementsKind elements_kind) { 3377 // --- I n t e r n a l A r r a y --- 3378 // An array constructor on the builtins object that works like 3379 // the public Array constructor, except that its prototype 3380 // doesn't inherit from Object.prototype. 3381 // To be used only for internal work by builtins. Instances 3382 // must not be leaked to user code. 3383 Handle<JSObject> prototype = 3384 factory()->NewJSObject(isolate()->object_function(), TENURED); 3385 Handle<JSFunction> array_function = 3386 InstallFunction(target, name, JS_ARRAY_TYPE, JSArray::kSize, prototype, 3387 Builtins::kInternalArrayCode); 3388 3389 InternalArrayConstructorStub internal_array_constructor_stub(isolate()); 3390 Handle<Code> code = internal_array_constructor_stub.GetCode(); 3391 array_function->shared()->SetConstructStub(*code); 3392 array_function->shared()->DontAdaptArguments(); 3393 3394 Handle<Map> original_map(array_function->initial_map()); 3395 Handle<Map> initial_map = Map::Copy(original_map, "InternalArray"); 3396 initial_map->set_elements_kind(elements_kind); 3397 JSFunction::SetInitialMap(array_function, initial_map, prototype); 3398 3399 // Make "length" magic on instances. 3400 Map::EnsureDescriptorSlack(initial_map, 1); 3401 3402 PropertyAttributes attribs = static_cast<PropertyAttributes>( 3403 DONT_ENUM | DONT_DELETE); 3404 3405 Handle<AccessorInfo> array_length = 3406 Accessors::ArrayLengthInfo(isolate(), attribs); 3407 { // Add length. 3408 AccessorConstantDescriptor d(Handle<Name>(Name::cast(array_length->name())), 3409 array_length, attribs); 3410 initial_map->AppendDescriptor(&d); 3411 } 3412 3413 return array_function; 3414 } 3415 3416 bool Genesis::InstallNatives(GlobalContextType context_type) { 3417 HandleScope scope(isolate()); 3418 3419 // Set up the utils object as shared container between native scripts. 3420 Handle<JSObject> utils = factory()->NewJSObject(isolate()->object_function()); 3421 JSObject::NormalizeProperties(utils, CLEAR_INOBJECT_PROPERTIES, 16, 3422 "utils container for native scripts"); 3423 native_context()->set_natives_utils_object(*utils); 3424 3425 // Set up the extras utils object as a shared container between native 3426 // scripts and extras. (Extras consume things added there by native scripts.) 3427 Handle<JSObject> extras_utils = 3428 factory()->NewJSObject(isolate()->object_function()); 3429 native_context()->set_extras_utils_object(*extras_utils); 3430 3431 InstallInternalArray(extras_utils, "InternalPackedArray", FAST_ELEMENTS); 3432 3433 int builtin_index = Natives::GetDebuggerCount(); 3434 // Only run prologue.js and runtime.js at this point. 3435 DCHECK_EQ(builtin_index, Natives::GetIndex("prologue")); 3436 if (!Bootstrapper::CompileBuiltin(isolate(), builtin_index++)) return false; 3437 DCHECK_EQ(builtin_index, Natives::GetIndex("runtime")); 3438 if (!Bootstrapper::CompileBuiltin(isolate(), builtin_index++)) return false; 3439 3440 { 3441 // Builtin function for OpaqueReference -- a JSValue-based object, 3442 // that keeps its field isolated from JavaScript code. It may store 3443 // objects, that JavaScript code may not access. 3444 Handle<JSFunction> opaque_reference_fun = factory()->NewFunction( 3445 factory()->empty_string(), isolate()->builtins()->Illegal(), 3446 isolate()->initial_object_prototype(), JS_VALUE_TYPE, JSValue::kSize); 3447 Handle<JSObject> prototype = 3448 factory()->NewJSObject(isolate()->object_function(), TENURED); 3449 Accessors::FunctionSetPrototype(opaque_reference_fun, prototype).Assert(); 3450 native_context()->set_opaque_reference_function(*opaque_reference_fun); 3451 } 3452 3453 // InternalArrays should not use Smi-Only array optimizations. There are too 3454 // many places in the C++ runtime code (e.g. RegEx) that assume that 3455 // elements in InternalArrays can be set to non-Smi values without going 3456 // through a common bottleneck that would make the SMI_ONLY -> FAST_ELEMENT 3457 // transition easy to trap. Moreover, they rarely are smi-only. 3458 { 3459 HandleScope scope(isolate()); 3460 Handle<JSObject> utils = 3461 Handle<JSObject>::cast(isolate()->natives_utils_object()); 3462 Handle<JSFunction> array_function = 3463 InstallInternalArray(utils, "InternalArray", FAST_HOLEY_ELEMENTS); 3464 native_context()->set_internal_array_function(*array_function); 3465 InstallInternalArray(utils, "InternalPackedArray", FAST_ELEMENTS); 3466 } 3467 3468 // Run the rest of the native scripts. 3469 while (builtin_index < Natives::GetBuiltinsCount()) { 3470 if (!Bootstrapper::CompileBuiltin(isolate(), builtin_index++)) return false; 3471 } 3472 3473 if (!CallUtilsFunction(isolate(), "PostNatives")) return false; 3474 auto fast_template_instantiations_cache = isolate()->factory()->NewFixedArray( 3475 TemplateInfo::kFastTemplateInstantiationsCacheSize); 3476 native_context()->set_fast_template_instantiations_cache( 3477 *fast_template_instantiations_cache); 3478 3479 auto slow_template_instantiations_cache = UnseededNumberDictionary::New( 3480 isolate(), ApiNatives::kInitialFunctionCacheSize); 3481 native_context()->set_slow_template_instantiations_cache( 3482 *slow_template_instantiations_cache); 3483 3484 // Store the map for the %ObjectPrototype% after the natives has been compiled 3485 // and the Object function has been set up. 3486 Handle<JSFunction> object_function(native_context()->object_function()); 3487 DCHECK(JSObject::cast(object_function->initial_map()->prototype()) 3488 ->HasFastProperties()); 3489 native_context()->set_object_function_prototype_map( 3490 HeapObject::cast(object_function->initial_map()->prototype())->map()); 3491 3492 // Set up the map for Object.create(null) instances. 3493 Handle<Map> slow_object_with_null_prototype_map = 3494 Map::CopyInitialMap(handle(object_function->initial_map(), isolate())); 3495 slow_object_with_null_prototype_map->set_dictionary_map(true); 3496 Map::SetPrototype(slow_object_with_null_prototype_map, 3497 isolate()->factory()->null_value()); 3498 native_context()->set_slow_object_with_null_prototype_map( 3499 *slow_object_with_null_prototype_map); 3500 3501 // Store the map for the %StringPrototype% after the natives has been compiled 3502 // and the String function has been set up. 3503 Handle<JSFunction> string_function(native_context()->string_function()); 3504 DCHECK(JSObject::cast( 3505 string_function->initial_map()->prototype())->HasFastProperties()); 3506 native_context()->set_string_function_prototype_map( 3507 HeapObject::cast(string_function->initial_map()->prototype())->map()); 3508 3509 Handle<JSGlobalObject> global_object = 3510 handle(native_context()->global_object()); 3511 3512 // Install Global.decodeURI. 3513 SimpleInstallFunction(global_object, "decodeURI", Builtins::kGlobalDecodeURI, 3514 1, false, kGlobalDecodeURI); 3515 3516 // Install Global.decodeURIComponent. 3517 SimpleInstallFunction(global_object, "decodeURIComponent", 3518 Builtins::kGlobalDecodeURIComponent, 1, false, 3519 kGlobalDecodeURIComponent); 3520 3521 // Install Global.encodeURI. 3522 SimpleInstallFunction(global_object, "encodeURI", Builtins::kGlobalEncodeURI, 3523 1, false, kGlobalEncodeURI); 3524 3525 // Install Global.encodeURIComponent. 3526 SimpleInstallFunction(global_object, "encodeURIComponent", 3527 Builtins::kGlobalEncodeURIComponent, 1, false, 3528 kGlobalEncodeURIComponent); 3529 3530 // Install Global.escape. 3531 SimpleInstallFunction(global_object, "escape", Builtins::kGlobalEscape, 1, 3532 false, kGlobalEscape); 3533 3534 // Install Global.unescape. 3535 SimpleInstallFunction(global_object, "unescape", Builtins::kGlobalUnescape, 1, 3536 false, kGlobalUnescape); 3537 3538 // Install Global.eval. 3539 { 3540 Handle<JSFunction> eval = 3541 SimpleInstallFunction(global_object, factory()->eval_string(), 3542 Builtins::kGlobalEval, 1, false); 3543 native_context()->set_global_eval_fun(*eval); 3544 } 3545 3546 // Install Global.isFinite 3547 SimpleInstallFunction(global_object, "isFinite", Builtins::kGlobalIsFinite, 1, 3548 true, kGlobalIsFinite); 3549 3550 // Install Global.isNaN 3551 SimpleInstallFunction(global_object, "isNaN", Builtins::kGlobalIsNaN, 1, true, 3552 kGlobalIsNaN); 3553 3554 // Install Array.prototype.concat 3555 { 3556 Handle<JSFunction> array_constructor(native_context()->array_function()); 3557 Handle<JSObject> proto(JSObject::cast(array_constructor->prototype())); 3558 Handle<JSFunction> concat = 3559 InstallFunction(proto, "concat", JS_OBJECT_TYPE, JSObject::kHeaderSize, 3560 MaybeHandle<JSObject>(), Builtins::kArrayConcat); 3561 3562 // Make sure that Array.prototype.concat appears to be compiled. 3563 // The code will never be called, but inline caching for call will 3564 // only work if it appears to be compiled. 3565 concat->shared()->DontAdaptArguments(); 3566 DCHECK(concat->is_compiled()); 3567 // Set the lengths for the functions to satisfy ECMA-262. 3568 concat->shared()->set_length(1); 3569 } 3570 3571 // Install InternalArray.prototype.concat 3572 { 3573 Handle<JSFunction> array_constructor( 3574 native_context()->internal_array_function()); 3575 Handle<JSObject> proto(JSObject::cast(array_constructor->prototype())); 3576 Handle<JSFunction> concat = 3577 InstallFunction(proto, "concat", JS_OBJECT_TYPE, JSObject::kHeaderSize, 3578 MaybeHandle<JSObject>(), Builtins::kArrayConcat); 3579 3580 // Make sure that InternalArray.prototype.concat appears to be compiled. 3581 // The code will never be called, but inline caching for call will 3582 // only work if it appears to be compiled. 3583 concat->shared()->DontAdaptArguments(); 3584 DCHECK(concat->is_compiled()); 3585 // Set the lengths for the functions to satisfy ECMA-262. 3586 concat->shared()->set_length(1); 3587 } 3588 3589 // Set up the Promise constructor. 3590 { 3591 Handle<String> key = factory()->Promise_string(); 3592 Handle<JSFunction> function = Handle<JSFunction>::cast( 3593 JSReceiver::GetProperty(global_object, key).ToHandleChecked()); 3594 JSFunction::EnsureHasInitialMap(function); 3595 function->initial_map()->set_instance_type(JS_PROMISE_TYPE); 3596 function->shared()->SetConstructStub( 3597 *isolate()->builtins()->JSBuiltinsConstructStub()); 3598 InstallWithIntrinsicDefaultProto(isolate(), function, 3599 Context::PROMISE_FUNCTION_INDEX); 3600 3601 { 3602 Handle<Code> code = handle( 3603 isolate()->builtins()->builtin(Builtins::kPromiseResolveClosure), 3604 isolate()); 3605 Handle<SharedFunctionInfo> info = 3606 isolate()->factory()->NewSharedFunctionInfo(factory()->empty_string(), 3607 code, false); 3608 info->set_internal_formal_parameter_count(1); 3609 info->set_length(1); 3610 native_context()->set_promise_resolve_shared_fun(*info); 3611 3612 code = handle( 3613 isolate()->builtins()->builtin(Builtins::kPromiseRejectClosure), 3614 isolate()); 3615 info = isolate()->factory()->NewSharedFunctionInfo( 3616 factory()->empty_string(), code, false); 3617 info->set_internal_formal_parameter_count(2); 3618 info->set_length(1); 3619 native_context()->set_promise_reject_shared_fun(*info); 3620 } 3621 3622 Handle<JSFunction> create_resolving_functions = 3623 SimpleCreateFunction(isolate(), factory()->empty_string(), 3624 Builtins::kCreateResolvingFunctions, 2, false); 3625 native_context()->set_create_resolving_functions( 3626 *create_resolving_functions); 3627 } 3628 3629 InstallBuiltinFunctionIds(); 3630 3631 // Create a map for accessor property descriptors (a variant of JSObject 3632 // that predefines four properties get, set, configurable and enumerable). 3633 { 3634 // AccessorPropertyDescriptor initial map. 3635 Handle<Map> map = 3636 factory()->NewMap(JS_OBJECT_TYPE, JSAccessorPropertyDescriptor::kSize); 3637 // Create the descriptor array for the property descriptor object. 3638 Map::EnsureDescriptorSlack(map, 4); 3639 3640 { // get 3641 DataDescriptor d(factory()->get_string(), 3642 JSAccessorPropertyDescriptor::kGetIndex, NONE, 3643 Representation::Tagged()); 3644 map->AppendDescriptor(&d); 3645 } 3646 { // set 3647 DataDescriptor d(factory()->set_string(), 3648 JSAccessorPropertyDescriptor::kSetIndex, NONE, 3649 Representation::Tagged()); 3650 map->AppendDescriptor(&d); 3651 } 3652 { // enumerable 3653 DataDescriptor d(factory()->enumerable_string(), 3654 JSAccessorPropertyDescriptor::kEnumerableIndex, NONE, 3655 Representation::Tagged()); 3656 map->AppendDescriptor(&d); 3657 } 3658 { // configurable 3659 DataDescriptor d(factory()->configurable_string(), 3660 JSAccessorPropertyDescriptor::kConfigurableIndex, NONE, 3661 Representation::Tagged()); 3662 map->AppendDescriptor(&d); 3663 } 3664 3665 Map::SetPrototype(map, isolate()->initial_object_prototype()); 3666 map->SetConstructor(native_context()->object_function()); 3667 map->SetInObjectProperties(4); 3668 map->set_unused_property_fields(0); 3669 3670 native_context()->set_accessor_property_descriptor_map(*map); 3671 } 3672 3673 // Create a map for data property descriptors (a variant of JSObject 3674 // that predefines four properties value, writable, configurable and 3675 // enumerable). 3676 { 3677 // DataPropertyDescriptor initial map. 3678 Handle<Map> map = 3679 factory()->NewMap(JS_OBJECT_TYPE, JSDataPropertyDescriptor::kSize); 3680 // Create the descriptor array for the property descriptor object. 3681 Map::EnsureDescriptorSlack(map, 4); 3682 3683 { // value 3684 DataDescriptor d(factory()->value_string(), 3685 JSDataPropertyDescriptor::kValueIndex, NONE, 3686 Representation::Tagged()); 3687 map->AppendDescriptor(&d); 3688 } 3689 { // writable 3690 DataDescriptor d(factory()->writable_string(), 3691 JSDataPropertyDescriptor::kWritableIndex, NONE, 3692 Representation::Tagged()); 3693 map->AppendDescriptor(&d); 3694 } 3695 { // enumerable 3696 DataDescriptor d(factory()->enumerable_string(), 3697 JSDataPropertyDescriptor::kEnumerableIndex, NONE, 3698 Representation::Tagged()); 3699 map->AppendDescriptor(&d); 3700 } 3701 { // configurable 3702 DataDescriptor d(factory()->configurable_string(), 3703 JSDataPropertyDescriptor::kConfigurableIndex, NONE, 3704 Representation::Tagged()); 3705 map->AppendDescriptor(&d); 3706 } 3707 3708 Map::SetPrototype(map, isolate()->initial_object_prototype()); 3709 map->SetConstructor(native_context()->object_function()); 3710 map->SetInObjectProperties(4); 3711 map->set_unused_property_fields(0); 3712 3713 native_context()->set_data_property_descriptor_map(*map); 3714 } 3715 3716 // Create a constructor for RegExp results (a variant of Array that 3717 // predefines the two properties index and match). 3718 { 3719 // RegExpResult initial map. 3720 3721 // Find global.Array.prototype to inherit from. 3722 Handle<JSFunction> array_constructor(native_context()->array_function()); 3723 Handle<JSObject> array_prototype( 3724 JSObject::cast(array_constructor->instance_prototype())); 3725 3726 // Add initial map. 3727 Handle<Map> initial_map = 3728 factory()->NewMap(JS_ARRAY_TYPE, JSRegExpResult::kSize); 3729 initial_map->SetConstructor(*array_constructor); 3730 3731 // Set prototype on map. 3732 initial_map->set_non_instance_prototype(false); 3733 Map::SetPrototype(initial_map, array_prototype); 3734 3735 // Update map with length accessor from Array and add "index" and "input". 3736 Map::EnsureDescriptorSlack(initial_map, 3); 3737 3738 { 3739 JSFunction* array_function = native_context()->array_function(); 3740 Handle<DescriptorArray> array_descriptors( 3741 array_function->initial_map()->instance_descriptors()); 3742 Handle<String> length = factory()->length_string(); 3743 int old = array_descriptors->SearchWithCache( 3744 isolate(), *length, array_function->initial_map()); 3745 DCHECK(old != DescriptorArray::kNotFound); 3746 AccessorConstantDescriptor desc( 3747 length, handle(array_descriptors->GetValue(old), isolate()), 3748 array_descriptors->GetDetails(old).attributes()); 3749 initial_map->AppendDescriptor(&desc); 3750 } 3751 { 3752 DataDescriptor index_field(factory()->index_string(), 3753 JSRegExpResult::kIndexIndex, NONE, 3754 Representation::Tagged()); 3755 initial_map->AppendDescriptor(&index_field); 3756 } 3757 3758 { 3759 DataDescriptor input_field(factory()->input_string(), 3760 JSRegExpResult::kInputIndex, NONE, 3761 Representation::Tagged()); 3762 initial_map->AppendDescriptor(&input_field); 3763 } 3764 3765 initial_map->SetInObjectProperties(2); 3766 initial_map->set_unused_property_fields(0); 3767 3768 native_context()->set_regexp_result_map(*initial_map); 3769 } 3770 3771 // Add @@iterator method to the arguments object maps. 3772 { 3773 PropertyAttributes attribs = DONT_ENUM; 3774 Handle<AccessorInfo> arguments_iterator = 3775 Accessors::ArgumentsIteratorInfo(isolate(), attribs); 3776 { 3777 AccessorConstantDescriptor d(factory()->iterator_symbol(), 3778 arguments_iterator, attribs); 3779 Handle<Map> map(native_context()->sloppy_arguments_map()); 3780 Map::EnsureDescriptorSlack(map, 1); 3781 map->AppendDescriptor(&d); 3782 } 3783 { 3784 AccessorConstantDescriptor d(factory()->iterator_symbol(), 3785 arguments_iterator, attribs); 3786 Handle<Map> map(native_context()->fast_aliased_arguments_map()); 3787 Map::EnsureDescriptorSlack(map, 1); 3788 map->AppendDescriptor(&d); 3789 } 3790 { 3791 AccessorConstantDescriptor d(factory()->iterator_symbol(), 3792 arguments_iterator, attribs); 3793 Handle<Map> map(native_context()->slow_aliased_arguments_map()); 3794 Map::EnsureDescriptorSlack(map, 1); 3795 map->AppendDescriptor(&d); 3796 } 3797 { 3798 AccessorConstantDescriptor d(factory()->iterator_symbol(), 3799 arguments_iterator, attribs); 3800 Handle<Map> map(native_context()->strict_arguments_map()); 3801 Map::EnsureDescriptorSlack(map, 1); 3802 map->AppendDescriptor(&d); 3803 } 3804 } 3805 3806 return true; 3807 } 3808 3809 3810 bool Genesis::InstallExperimentalNatives() { 3811 static const char* harmony_tailcalls_natives[] = {nullptr}; 3812 static const char* harmony_sharedarraybuffer_natives[] = { 3813 "native harmony-atomics.js", NULL}; 3814 static const char* harmony_simd_natives[] = {"native harmony-simd.js", 3815 nullptr}; 3816 static const char* harmony_do_expressions_natives[] = {nullptr}; 3817 static const char* harmony_regexp_lookbehind_natives[] = {nullptr}; 3818 static const char* harmony_regexp_named_captures_natives[] = {nullptr}; 3819 static const char* harmony_regexp_property_natives[] = {nullptr}; 3820 static const char* harmony_function_sent_natives[] = {nullptr}; 3821 static const char* harmony_array_prototype_values_natives[] = {nullptr}; 3822 static const char* harmony_string_padding_natives[] = { 3823 "native harmony-string-padding.js", nullptr}; 3824 #ifdef V8_I18N_SUPPORT 3825 static const char* icu_case_mapping_natives[] = {"native icu-case-mapping.js", 3826 nullptr}; 3827 static const char* datetime_format_to_parts_natives[] = { 3828 "native datetime-format-to-parts.js", nullptr}; 3829 #endif 3830 static const char* harmony_async_await_natives[] = {nullptr}; 3831 static const char* harmony_restrictive_generators_natives[] = {nullptr}; 3832 static const char* harmony_trailing_commas_natives[] = {nullptr}; 3833 static const char* harmony_class_fields_natives[] = {nullptr}; 3834 3835 for (int i = ExperimentalNatives::GetDebuggerCount(); 3836 i < ExperimentalNatives::GetBuiltinsCount(); i++) { 3837 #define INSTALL_EXPERIMENTAL_NATIVES(id, desc) \ 3838 if (FLAG_##id) { \ 3839 for (size_t j = 0; id##_natives[j] != NULL; j++) { \ 3840 Vector<const char> script_name = ExperimentalNatives::GetScriptName(i); \ 3841 if (strncmp(script_name.start(), id##_natives[j], \ 3842 script_name.length()) == 0) { \ 3843 if (!Bootstrapper::CompileExperimentalBuiltin(isolate(), i)) { \ 3844 return false; \ 3845 } \ 3846 } \ 3847 } \ 3848 } 3849 HARMONY_INPROGRESS(INSTALL_EXPERIMENTAL_NATIVES); 3850 HARMONY_STAGED(INSTALL_EXPERIMENTAL_NATIVES); 3851 HARMONY_SHIPPING(INSTALL_EXPERIMENTAL_NATIVES); 3852 #undef INSTALL_EXPERIMENTAL_NATIVES 3853 } 3854 3855 if (!CallUtilsFunction(isolate(), "PostExperimentals")) return false; 3856 3857 InstallExperimentalBuiltinFunctionIds(); 3858 return true; 3859 } 3860 3861 3862 bool Genesis::InstallExtraNatives() { 3863 HandleScope scope(isolate()); 3864 3865 Handle<JSObject> extras_binding = 3866 factory()->NewJSObject(isolate()->object_function()); 3867 native_context()->set_extras_binding_object(*extras_binding); 3868 3869 for (int i = ExtraNatives::GetDebuggerCount(); 3870 i < ExtraNatives::GetBuiltinsCount(); i++) { 3871 if (!Bootstrapper::CompileExtraBuiltin(isolate(), i)) return false; 3872 } 3873 3874 return true; 3875 } 3876 3877 3878 bool Genesis::InstallExperimentalExtraNatives() { 3879 for (int i = ExperimentalExtraNatives::GetDebuggerCount(); 3880 i < ExperimentalExtraNatives::GetBuiltinsCount(); i++) { 3881 if (!Bootstrapper::CompileExperimentalExtraBuiltin(isolate(), i)) 3882 return false; 3883 } 3884 3885 return true; 3886 } 3887 3888 3889 bool Genesis::InstallDebuggerNatives() { 3890 for (int i = 0; i < Natives::GetDebuggerCount(); ++i) { 3891 if (!Bootstrapper::CompileBuiltin(isolate(), i)) return false; 3892 } 3893 return CallUtilsFunction(isolate(), "PostDebug"); 3894 } 3895 3896 3897 static void InstallBuiltinFunctionId(Handle<JSObject> holder, 3898 const char* function_name, 3899 BuiltinFunctionId id) { 3900 Isolate* isolate = holder->GetIsolate(); 3901 Handle<Object> function_object = 3902 JSReceiver::GetProperty(isolate, holder, function_name).ToHandleChecked(); 3903 Handle<JSFunction> function = Handle<JSFunction>::cast(function_object); 3904 function->shared()->set_builtin_function_id(id); 3905 } 3906 3907 3908 #define INSTALL_BUILTIN_ID(holder_expr, fun_name, name) \ 3909 { #holder_expr, #fun_name, k##name } \ 3910 , 3911 3912 3913 void Genesis::InstallBuiltinFunctionIds() { 3914 HandleScope scope(isolate()); 3915 struct BuiltinFunctionIds { 3916 const char* holder_expr; 3917 const char* fun_name; 3918 BuiltinFunctionId id; 3919 }; 3920 3921 const BuiltinFunctionIds builtins[] = { 3922 FUNCTIONS_WITH_ID_LIST(INSTALL_BUILTIN_ID)}; 3923 3924 for (const BuiltinFunctionIds& builtin : builtins) { 3925 Handle<JSObject> holder = 3926 ResolveBuiltinIdHolder(native_context(), builtin.holder_expr); 3927 InstallBuiltinFunctionId(holder, builtin.fun_name, builtin.id); 3928 } 3929 } 3930 3931 3932 void Genesis::InstallExperimentalBuiltinFunctionIds() { 3933 if (FLAG_harmony_sharedarraybuffer) { 3934 struct BuiltinFunctionIds { 3935 const char* holder_expr; 3936 const char* fun_name; 3937 BuiltinFunctionId id; 3938 }; 3939 3940 const BuiltinFunctionIds atomic_builtins[] = { 3941 ATOMIC_FUNCTIONS_WITH_ID_LIST(INSTALL_BUILTIN_ID)}; 3942 3943 for (const BuiltinFunctionIds& builtin : atomic_builtins) { 3944 Handle<JSObject> holder = 3945 ResolveBuiltinIdHolder(native_context(), builtin.holder_expr); 3946 InstallBuiltinFunctionId(holder, builtin.fun_name, builtin.id); 3947 } 3948 } 3949 } 3950 3951 3952 #undef INSTALL_BUILTIN_ID 3953 3954 3955 void Genesis::InitializeNormalizedMapCaches() { 3956 Handle<NormalizedMapCache> cache = NormalizedMapCache::New(isolate()); 3957 native_context()->set_normalized_map_cache(*cache); 3958 } 3959 3960 3961 bool Bootstrapper::InstallExtensions(Handle<Context> native_context, 3962 v8::ExtensionConfiguration* extensions) { 3963 BootstrapperActive active(this); 3964 SaveContext saved_context(isolate_); 3965 isolate_->set_context(*native_context); 3966 return Genesis::InstallExtensions(native_context, extensions) && 3967 Genesis::InstallSpecialObjects(native_context); 3968 } 3969 3970 3971 bool Genesis::InstallSpecialObjects(Handle<Context> native_context) { 3972 Isolate* isolate = native_context->GetIsolate(); 3973 // Don't install extensions into the snapshot. 3974 if (isolate->serializer_enabled()) return true; 3975 3976 Factory* factory = isolate->factory(); 3977 HandleScope scope(isolate); 3978 Handle<JSGlobalObject> global(JSGlobalObject::cast( 3979 native_context->global_object())); 3980 3981 Handle<JSObject> Error = isolate->error_function(); 3982 Handle<String> name = 3983 factory->InternalizeOneByteString(STATIC_CHAR_VECTOR("stackTraceLimit")); 3984 Handle<Smi> stack_trace_limit(Smi::FromInt(FLAG_stack_trace_limit), isolate); 3985 JSObject::AddProperty(Error, name, stack_trace_limit, NONE); 3986 3987 // Expose the debug global object in global if a name for it is specified. 3988 if (FLAG_expose_debug_as != NULL && strlen(FLAG_expose_debug_as) != 0) { 3989 // If loading fails we just bail out without installing the 3990 // debugger but without tanking the whole context. 3991 Debug* debug = isolate->debug(); 3992 if (!debug->Load()) return true; 3993 Handle<Context> debug_context = debug->debug_context(); 3994 // Set the security token for the debugger context to the same as 3995 // the shell native context to allow calling between these (otherwise 3996 // exposing debug global object doesn't make much sense). 3997 debug_context->set_security_token(native_context->security_token()); 3998 Handle<String> debug_string = 3999 factory->InternalizeUtf8String(FLAG_expose_debug_as); 4000 uint32_t index; 4001 if (debug_string->AsArrayIndex(&index)) return true; 4002 Handle<Object> global_proxy(debug_context->global_proxy(), isolate); 4003 JSObject::AddProperty(global, debug_string, global_proxy, DONT_ENUM); 4004 } 4005 4006 WasmJs::Install(isolate, global); 4007 4008 return true; 4009 } 4010 4011 4012 static uint32_t Hash(RegisteredExtension* extension) { 4013 return v8::internal::ComputePointerHash(extension); 4014 } 4015 4016 Genesis::ExtensionStates::ExtensionStates() : map_(8) {} 4017 4018 Genesis::ExtensionTraversalState Genesis::ExtensionStates::get_state( 4019 RegisteredExtension* extension) { 4020 base::HashMap::Entry* entry = map_.Lookup(extension, Hash(extension)); 4021 if (entry == NULL) { 4022 return UNVISITED; 4023 } 4024 return static_cast<ExtensionTraversalState>( 4025 reinterpret_cast<intptr_t>(entry->value)); 4026 } 4027 4028 void Genesis::ExtensionStates::set_state(RegisteredExtension* extension, 4029 ExtensionTraversalState state) { 4030 map_.LookupOrInsert(extension, Hash(extension))->value = 4031 reinterpret_cast<void*>(static_cast<intptr_t>(state)); 4032 } 4033 4034 4035 bool Genesis::InstallExtensions(Handle<Context> native_context, 4036 v8::ExtensionConfiguration* extensions) { 4037 Isolate* isolate = native_context->GetIsolate(); 4038 ExtensionStates extension_states; // All extensions have state UNVISITED. 4039 return InstallAutoExtensions(isolate, &extension_states) && 4040 (!FLAG_expose_free_buffer || 4041 InstallExtension(isolate, "v8/free-buffer", &extension_states)) && 4042 (!FLAG_expose_gc || 4043 InstallExtension(isolate, "v8/gc", &extension_states)) && 4044 (!FLAG_expose_externalize_string || 4045 InstallExtension(isolate, "v8/externalize", &extension_states)) && 4046 (!FLAG_gc_stats || 4047 InstallExtension(isolate, "v8/statistics", &extension_states)) && 4048 (!FLAG_expose_trigger_failure || 4049 InstallExtension(isolate, "v8/trigger-failure", &extension_states)) && 4050 (!FLAG_trace_ignition_dispatches || 4051 InstallExtension(isolate, "v8/ignition-statistics", 4052 &extension_states)) && 4053 InstallRequestedExtensions(isolate, extensions, &extension_states); 4054 } 4055 4056 4057 bool Genesis::InstallAutoExtensions(Isolate* isolate, 4058 ExtensionStates* extension_states) { 4059 for (v8::RegisteredExtension* it = v8::RegisteredExtension::first_extension(); 4060 it != NULL; 4061 it = it->next()) { 4062 if (it->extension()->auto_enable() && 4063 !InstallExtension(isolate, it, extension_states)) { 4064 return false; 4065 } 4066 } 4067 return true; 4068 } 4069 4070 4071 bool Genesis::InstallRequestedExtensions(Isolate* isolate, 4072 v8::ExtensionConfiguration* extensions, 4073 ExtensionStates* extension_states) { 4074 for (const char** it = extensions->begin(); it != extensions->end(); ++it) { 4075 if (!InstallExtension(isolate, *it, extension_states)) return false; 4076 } 4077 return true; 4078 } 4079 4080 4081 // Installs a named extension. This methods is unoptimized and does 4082 // not scale well if we want to support a large number of extensions. 4083 bool Genesis::InstallExtension(Isolate* isolate, 4084 const char* name, 4085 ExtensionStates* extension_states) { 4086 for (v8::RegisteredExtension* it = v8::RegisteredExtension::first_extension(); 4087 it != NULL; 4088 it = it->next()) { 4089 if (strcmp(name, it->extension()->name()) == 0) { 4090 return InstallExtension(isolate, it, extension_states); 4091 } 4092 } 4093 return Utils::ApiCheck(false, 4094 "v8::Context::New()", 4095 "Cannot find required extension"); 4096 } 4097 4098 4099 bool Genesis::InstallExtension(Isolate* isolate, 4100 v8::RegisteredExtension* current, 4101 ExtensionStates* extension_states) { 4102 HandleScope scope(isolate); 4103 4104 if (extension_states->get_state(current) == INSTALLED) return true; 4105 // The current node has already been visited so there must be a 4106 // cycle in the dependency graph; fail. 4107 if (!Utils::ApiCheck(extension_states->get_state(current) != VISITED, 4108 "v8::Context::New()", 4109 "Circular extension dependency")) { 4110 return false; 4111 } 4112 DCHECK(extension_states->get_state(current) == UNVISITED); 4113 extension_states->set_state(current, VISITED); 4114 v8::Extension* extension = current->extension(); 4115 // Install the extension's dependencies 4116 for (int i = 0; i < extension->dependency_count(); i++) { 4117 if (!InstallExtension(isolate, 4118 extension->dependencies()[i], 4119 extension_states)) { 4120 return false; 4121 } 4122 } 4123 // We do not expect this to throw an exception. Change this if it does. 4124 bool result = CompileExtension(isolate, extension); 4125 DCHECK(isolate->has_pending_exception() != result); 4126 if (!result) { 4127 // We print out the name of the extension that fail to install. 4128 // When an error is thrown during bootstrapping we automatically print 4129 // the line number at which this happened to the console in the isolate 4130 // error throwing functionality. 4131 base::OS::PrintError("Error installing extension '%s'.\n", 4132 current->extension()->name()); 4133 isolate->clear_pending_exception(); 4134 } 4135 extension_states->set_state(current, INSTALLED); 4136 isolate->NotifyExtensionInstalled(); 4137 return result; 4138 } 4139 4140 4141 bool Genesis::ConfigureGlobalObjects( 4142 v8::Local<v8::ObjectTemplate> global_proxy_template) { 4143 Handle<JSObject> global_proxy( 4144 JSObject::cast(native_context()->global_proxy())); 4145 Handle<JSObject> global_object( 4146 JSObject::cast(native_context()->global_object())); 4147 4148 if (!global_proxy_template.IsEmpty()) { 4149 // Configure the global proxy object. 4150 Handle<ObjectTemplateInfo> global_proxy_data = 4151 v8::Utils::OpenHandle(*global_proxy_template); 4152 if (!ConfigureApiObject(global_proxy, global_proxy_data)) return false; 4153 4154 // Configure the global object. 4155 Handle<FunctionTemplateInfo> proxy_constructor( 4156 FunctionTemplateInfo::cast(global_proxy_data->constructor())); 4157 if (!proxy_constructor->prototype_template()->IsUndefined(isolate())) { 4158 Handle<ObjectTemplateInfo> global_object_data( 4159 ObjectTemplateInfo::cast(proxy_constructor->prototype_template())); 4160 if (!ConfigureApiObject(global_object, global_object_data)) return false; 4161 } 4162 } 4163 4164 JSObject::ForceSetPrototype(global_proxy, global_object); 4165 4166 native_context()->set_initial_array_prototype( 4167 JSArray::cast(native_context()->array_function()->prototype())); 4168 native_context()->set_array_buffer_map( 4169 native_context()->array_buffer_fun()->initial_map()); 4170 native_context()->set_js_map_map( 4171 native_context()->js_map_fun()->initial_map()); 4172 native_context()->set_js_set_map( 4173 native_context()->js_set_fun()->initial_map()); 4174 4175 return true; 4176 } 4177 4178 4179 bool Genesis::ConfigureApiObject(Handle<JSObject> object, 4180 Handle<ObjectTemplateInfo> object_template) { 4181 DCHECK(!object_template.is_null()); 4182 DCHECK(FunctionTemplateInfo::cast(object_template->constructor()) 4183 ->IsTemplateFor(object->map()));; 4184 4185 MaybeHandle<JSObject> maybe_obj = 4186 ApiNatives::InstantiateObject(object_template); 4187 Handle<JSObject> obj; 4188 if (!maybe_obj.ToHandle(&obj)) { 4189 DCHECK(isolate()->has_pending_exception()); 4190 isolate()->clear_pending_exception(); 4191 return false; 4192 } 4193 TransferObject(obj, object); 4194 return true; 4195 } 4196 4197 4198 void Genesis::TransferNamedProperties(Handle<JSObject> from, 4199 Handle<JSObject> to) { 4200 // If JSObject::AddProperty asserts due to already existing property, 4201 // it is likely due to both global objects sharing property name(s). 4202 // Merging those two global objects is impossible. 4203 // The global template must not create properties that already exist 4204 // in the snapshotted global object. 4205 if (from->HasFastProperties()) { 4206 Handle<DescriptorArray> descs = 4207 Handle<DescriptorArray>(from->map()->instance_descriptors()); 4208 for (int i = 0; i < from->map()->NumberOfOwnDescriptors(); i++) { 4209 PropertyDetails details = descs->GetDetails(i); 4210 switch (details.type()) { 4211 case DATA: { 4212 HandleScope inner(isolate()); 4213 Handle<Name> key = Handle<Name>(descs->GetKey(i)); 4214 FieldIndex index = FieldIndex::ForDescriptor(from->map(), i); 4215 DCHECK(!descs->GetDetails(i).representation().IsDouble()); 4216 Handle<Object> value = Handle<Object>(from->RawFastPropertyAt(index), 4217 isolate()); 4218 JSObject::AddProperty(to, key, value, details.attributes()); 4219 break; 4220 } 4221 case DATA_CONSTANT: { 4222 HandleScope inner(isolate()); 4223 Handle<Name> key = Handle<Name>(descs->GetKey(i)); 4224 Handle<Object> constant(descs->GetConstant(i), isolate()); 4225 JSObject::AddProperty(to, key, constant, details.attributes()); 4226 break; 4227 } 4228 case ACCESSOR: 4229 UNREACHABLE(); 4230 case ACCESSOR_CONSTANT: { 4231 Handle<Name> key(descs->GetKey(i)); 4232 LookupIterator it(to, key, LookupIterator::OWN_SKIP_INTERCEPTOR); 4233 CHECK_NE(LookupIterator::ACCESS_CHECK, it.state()); 4234 // If the property is already there we skip it 4235 if (it.IsFound()) continue; 4236 HandleScope inner(isolate()); 4237 DCHECK(!to->HasFastProperties()); 4238 // Add to dictionary. 4239 Handle<Object> callbacks(descs->GetCallbacksObject(i), isolate()); 4240 PropertyDetails d(details.attributes(), ACCESSOR_CONSTANT, i + 1, 4241 PropertyCellType::kMutable); 4242 JSObject::SetNormalizedProperty(to, key, callbacks, d); 4243 break; 4244 } 4245 } 4246 } 4247 } else if (from->IsJSGlobalObject()) { 4248 Handle<GlobalDictionary> properties = 4249 Handle<GlobalDictionary>(from->global_dictionary()); 4250 int capacity = properties->Capacity(); 4251 for (int i = 0; i < capacity; i++) { 4252 Object* raw_key(properties->KeyAt(i)); 4253 if (properties->IsKey(isolate(), raw_key)) { 4254 DCHECK(raw_key->IsName()); 4255 // If the property is already there we skip it. 4256 Handle<Name> key(Name::cast(raw_key)); 4257 LookupIterator it(to, key, LookupIterator::OWN_SKIP_INTERCEPTOR); 4258 CHECK_NE(LookupIterator::ACCESS_CHECK, it.state()); 4259 if (it.IsFound()) continue; 4260 // Set the property. 4261 DCHECK(properties->ValueAt(i)->IsPropertyCell()); 4262 Handle<PropertyCell> cell(PropertyCell::cast(properties->ValueAt(i))); 4263 Handle<Object> value(cell->value(), isolate()); 4264 if (value->IsTheHole(isolate())) continue; 4265 PropertyDetails details = cell->property_details(); 4266 DCHECK_EQ(kData, details.kind()); 4267 JSObject::AddProperty(to, key, value, details.attributes()); 4268 } 4269 } 4270 } else { 4271 Handle<NameDictionary> properties = 4272 Handle<NameDictionary>(from->property_dictionary()); 4273 int capacity = properties->Capacity(); 4274 for (int i = 0; i < capacity; i++) { 4275 Object* raw_key(properties->KeyAt(i)); 4276 if (properties->IsKey(isolate(), raw_key)) { 4277 DCHECK(raw_key->IsName()); 4278 // If the property is already there we skip it. 4279 Handle<Name> key(Name::cast(raw_key)); 4280 LookupIterator it(to, key, LookupIterator::OWN_SKIP_INTERCEPTOR); 4281 CHECK_NE(LookupIterator::ACCESS_CHECK, it.state()); 4282 if (it.IsFound()) continue; 4283 // Set the property. 4284 Handle<Object> value = Handle<Object>(properties->ValueAt(i), 4285 isolate()); 4286 DCHECK(!value->IsCell()); 4287 DCHECK(!value->IsTheHole(isolate())); 4288 PropertyDetails details = properties->DetailsAt(i); 4289 DCHECK_EQ(kData, details.kind()); 4290 JSObject::AddProperty(to, key, value, details.attributes()); 4291 } 4292 } 4293 } 4294 } 4295 4296 4297 void Genesis::TransferIndexedProperties(Handle<JSObject> from, 4298 Handle<JSObject> to) { 4299 // Cloning the elements array is sufficient. 4300 Handle<FixedArray> from_elements = 4301 Handle<FixedArray>(FixedArray::cast(from->elements())); 4302 Handle<FixedArray> to_elements = factory()->CopyFixedArray(from_elements); 4303 to->set_elements(*to_elements); 4304 } 4305 4306 4307 void Genesis::TransferObject(Handle<JSObject> from, Handle<JSObject> to) { 4308 HandleScope outer(isolate()); 4309 4310 DCHECK(!from->IsJSArray()); 4311 DCHECK(!to->IsJSArray()); 4312 4313 TransferNamedProperties(from, to); 4314 TransferIndexedProperties(from, to); 4315 4316 // Transfer the prototype (new map is needed). 4317 Handle<Object> proto(from->map()->prototype(), isolate()); 4318 JSObject::ForceSetPrototype(to, proto); 4319 } 4320 4321 4322 void Genesis::MakeFunctionInstancePrototypeWritable() { 4323 // The maps with writable prototype are created in CreateEmptyFunction 4324 // and CreateStrictModeFunctionMaps respectively. Initially the maps are 4325 // created with read-only prototype for JS builtins processing. 4326 DCHECK(!sloppy_function_map_writable_prototype_.is_null()); 4327 DCHECK(!strict_function_map_writable_prototype_.is_null()); 4328 4329 // Replace function instance maps to make prototype writable. 4330 native_context()->set_sloppy_function_map( 4331 *sloppy_function_map_writable_prototype_); 4332 native_context()->set_strict_function_map( 4333 *strict_function_map_writable_prototype_); 4334 } 4335 4336 4337 class NoTrackDoubleFieldsForSerializerScope { 4338 public: 4339 explicit NoTrackDoubleFieldsForSerializerScope(Isolate* isolate) 4340 : flag_(FLAG_track_double_fields), enabled_(false) { 4341 if (isolate->serializer_enabled()) { 4342 // Disable tracking double fields because heap numbers treated as 4343 // immutable by the serializer. 4344 FLAG_track_double_fields = false; 4345 enabled_ = true; 4346 } 4347 } 4348 4349 ~NoTrackDoubleFieldsForSerializerScope() { 4350 if (enabled_) { 4351 FLAG_track_double_fields = flag_; 4352 } 4353 } 4354 4355 private: 4356 bool flag_; 4357 bool enabled_; 4358 }; 4359 4360 Genesis::Genesis(Isolate* isolate, 4361 MaybeHandle<JSGlobalProxy> maybe_global_proxy, 4362 v8::Local<v8::ObjectTemplate> global_proxy_template, 4363 v8::ExtensionConfiguration* extensions, 4364 size_t context_snapshot_index, GlobalContextType context_type) 4365 : isolate_(isolate), active_(isolate->bootstrapper()) { 4366 NoTrackDoubleFieldsForSerializerScope disable_scope(isolate); 4367 result_ = Handle<Context>::null(); 4368 global_proxy_ = Handle<JSGlobalProxy>::null(); 4369 4370 // Before creating the roots we must save the context and restore it 4371 // on all function exits. 4372 SaveContext saved_context(isolate); 4373 4374 // During genesis, the boilerplate for stack overflow won't work until the 4375 // environment has been at least partially initialized. Add a stack check 4376 // before entering JS code to catch overflow early. 4377 StackLimitCheck check(isolate); 4378 if (check.HasOverflowed()) { 4379 isolate->StackOverflow(); 4380 return; 4381 } 4382 4383 // The deserializer needs to hook up references to the global proxy. 4384 // Create an uninitialized global proxy now if we don't have one 4385 // and initialize it later in CreateNewGlobals. 4386 Handle<JSGlobalProxy> global_proxy; 4387 if (!maybe_global_proxy.ToHandle(&global_proxy)) { 4388 const int internal_field_count = 4389 !global_proxy_template.IsEmpty() 4390 ? global_proxy_template->InternalFieldCount() 4391 : 0; 4392 global_proxy = isolate->factory()->NewUninitializedJSGlobalProxy( 4393 JSGlobalProxy::SizeWithInternalFields(internal_field_count)); 4394 } 4395 4396 // We can only de-serialize a context if the isolate was initialized from 4397 // a snapshot. Otherwise we have to build the context from scratch. 4398 // Also create a context from scratch to expose natives, if required by flag. 4399 if (!isolate->initialized_from_snapshot() || 4400 !Snapshot::NewContextFromSnapshot(isolate, global_proxy, 4401 context_snapshot_index) 4402 .ToHandle(&native_context_)) { 4403 native_context_ = Handle<Context>(); 4404 } 4405 4406 if (!native_context().is_null()) { 4407 AddToWeakNativeContextList(*native_context()); 4408 isolate->set_context(*native_context()); 4409 isolate->counters()->contexts_created_by_snapshot()->Increment(); 4410 #if TRACE_MAPS 4411 if (FLAG_trace_maps) { 4412 Handle<JSFunction> object_fun = isolate->object_function(); 4413 PrintF("[TraceMap: InitialMap map= %p SFI= %d_Object ]\n", 4414 reinterpret_cast<void*>(object_fun->initial_map()), 4415 object_fun->shared()->unique_id()); 4416 Map::TraceAllTransitions(object_fun->initial_map()); 4417 } 4418 #endif 4419 Handle<JSGlobalObject> global_object = 4420 CreateNewGlobals(global_proxy_template, global_proxy); 4421 4422 HookUpGlobalProxy(global_object, global_proxy); 4423 HookUpGlobalObject(global_object); 4424 4425 if (!ConfigureGlobalObjects(global_proxy_template)) return; 4426 } else { 4427 // We get here if there was no context snapshot. 4428 CreateRoots(); 4429 Handle<JSFunction> empty_function = CreateEmptyFunction(isolate); 4430 CreateStrictModeFunctionMaps(empty_function); 4431 CreateIteratorMaps(empty_function); 4432 CreateAsyncFunctionMaps(empty_function); 4433 Handle<JSGlobalObject> global_object = 4434 CreateNewGlobals(global_proxy_template, global_proxy); 4435 HookUpGlobalProxy(global_object, global_proxy); 4436 InitializeGlobal(global_object, empty_function, context_type); 4437 InitializeNormalizedMapCaches(); 4438 4439 if (!InstallNatives(context_type)) return; 4440 4441 MakeFunctionInstancePrototypeWritable(); 4442 4443 if (!InstallExtraNatives()) return; 4444 if (!ConfigureGlobalObjects(global_proxy_template)) return; 4445 4446 isolate->counters()->contexts_created_from_scratch()->Increment(); 4447 // Re-initialize the counter because it got incremented during snapshot 4448 // creation. 4449 isolate->native_context()->set_errors_thrown(Smi::kZero); 4450 } 4451 4452 // Install experimental natives. Do not include them into the 4453 // snapshot as we should be able to turn them off at runtime. Re-installing 4454 // them after they have already been deserialized would also fail. 4455 if (context_type == FULL_CONTEXT) { 4456 if (!isolate->serializer_enabled()) { 4457 InitializeExperimentalGlobal(); 4458 if (!InstallExperimentalNatives()) return; 4459 4460 if (FLAG_experimental_extras) { 4461 if (!InstallExperimentalExtraNatives()) return; 4462 } 4463 } 4464 // The serializer cannot serialize typed arrays. Reset those typed arrays 4465 // for each new context. 4466 } else if (context_type == DEBUG_CONTEXT) { 4467 DCHECK(!isolate->serializer_enabled()); 4468 InitializeExperimentalGlobal(); 4469 if (!InstallDebuggerNatives()) return; 4470 } 4471 4472 ConfigureUtilsObject(context_type); 4473 4474 // Check that the script context table is empty except for the 'this' binding. 4475 // We do not need script contexts for native scripts. 4476 DCHECK_EQ(1, native_context()->script_context_table()->used()); 4477 4478 result_ = native_context(); 4479 } 4480 4481 Genesis::Genesis(Isolate* isolate, 4482 MaybeHandle<JSGlobalProxy> maybe_global_proxy, 4483 v8::Local<v8::ObjectTemplate> global_proxy_template) 4484 : isolate_(isolate), active_(isolate->bootstrapper()) { 4485 NoTrackDoubleFieldsForSerializerScope disable_scope(isolate); 4486 result_ = Handle<Context>::null(); 4487 global_proxy_ = Handle<JSGlobalProxy>::null(); 4488 4489 // Before creating the roots we must save the context and restore it 4490 // on all function exits. 4491 SaveContext saved_context(isolate); 4492 4493 // During genesis, the boilerplate for stack overflow won't work until the 4494 // environment has been at least partially initialized. Add a stack check 4495 // before entering JS code to catch overflow early. 4496 StackLimitCheck check(isolate); 4497 if (check.HasOverflowed()) { 4498 isolate->StackOverflow(); 4499 return; 4500 } 4501 4502 const int proxy_size = JSGlobalProxy::SizeWithInternalFields( 4503 global_proxy_template->InternalFieldCount()); 4504 4505 Handle<JSGlobalProxy> global_proxy; 4506 if (!maybe_global_proxy.ToHandle(&global_proxy)) { 4507 global_proxy = factory()->NewUninitializedJSGlobalProxy(proxy_size); 4508 } 4509 4510 // CreateNewGlobals. 4511 Handle<ObjectTemplateInfo> global_proxy_data = 4512 v8::Utils::OpenHandle(*global_proxy_template); 4513 Handle<FunctionTemplateInfo> global_constructor( 4514 FunctionTemplateInfo::cast(global_proxy_data->constructor())); 4515 Handle<SharedFunctionInfo> shared = 4516 FunctionTemplateInfo::GetOrCreateSharedFunctionInfo(isolate, 4517 global_constructor); 4518 Handle<Map> initial_map = 4519 factory()->CreateSloppyFunctionMap(FUNCTION_WITH_WRITEABLE_PROTOTYPE); 4520 Handle<JSFunction> global_proxy_function = 4521 isolate->factory()->NewFunctionFromSharedFunctionInfo( 4522 initial_map, shared, factory()->undefined_value()); 4523 DCHECK_EQ(global_proxy_data->internal_field_count(), 4524 global_proxy_template->InternalFieldCount()); 4525 Handle<Map> global_proxy_map = isolate->factory()->NewMap( 4526 JS_GLOBAL_PROXY_TYPE, proxy_size, FAST_HOLEY_SMI_ELEMENTS); 4527 JSFunction::SetInitialMap(global_proxy_function, global_proxy_map, 4528 factory()->null_value()); 4529 global_proxy_map->set_is_access_check_needed(true); 4530 global_proxy_map->set_is_callable(); 4531 global_proxy_map->set_is_constructor(true); 4532 global_proxy_map->set_has_hidden_prototype(true); 4533 4534 Handle<String> global_name = factory()->global_string(); 4535 global_proxy_function->shared()->set_instance_class_name(*global_name); 4536 factory()->ReinitializeJSGlobalProxy(global_proxy, global_proxy_function); 4537 4538 // HookUpGlobalProxy. 4539 global_proxy->set_native_context(heap()->null_value()); 4540 4541 // DetachGlobal. 4542 JSObject::ForceSetPrototype(global_proxy, factory()->null_value()); 4543 4544 global_proxy_ = global_proxy; 4545 } 4546 4547 // Support for thread preemption. 4548 4549 // Reserve space for statics needing saving and restoring. 4550 int Bootstrapper::ArchiveSpacePerThread() { 4551 return sizeof(NestingCounterType); 4552 } 4553 4554 4555 // Archive statics that are thread-local. 4556 char* Bootstrapper::ArchiveState(char* to) { 4557 *reinterpret_cast<NestingCounterType*>(to) = nesting_; 4558 nesting_ = 0; 4559 return to + sizeof(NestingCounterType); 4560 } 4561 4562 4563 // Restore statics that are thread-local. 4564 char* Bootstrapper::RestoreState(char* from) { 4565 nesting_ = *reinterpret_cast<NestingCounterType*>(from); 4566 return from + sizeof(NestingCounterType); 4567 } 4568 4569 4570 // Called when the top-level V8 mutex is destroyed. 4571 void Bootstrapper::FreeThreadResources() { 4572 DCHECK(!IsActive()); 4573 } 4574 4575 } // namespace internal 4576 } // namespace v8 4577
