Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1 | // Copyright 2015 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/api-natives.h" |
| 6 | |
| 7 | #include "src/api.h" |
| 8 | #include "src/isolate-inl.h" |
| 9 | #include "src/lookup.h" |
| 10 | #include "src/messages.h" |
| 11 | |
| 12 | namespace v8 { |
| 13 | namespace internal { |
| 14 | |
| 15 | |
| 16 | namespace { |
| 17 | |
| 18 | MaybeHandle<JSObject> InstantiateObject(Isolate* isolate, |
| 19 | Handle<ObjectTemplateInfo> data); |
| 20 | |
| 21 | |
| 22 | MaybeHandle<JSFunction> InstantiateFunction(Isolate* isolate, |
| 23 | Handle<FunctionTemplateInfo> data, |
| 24 | Handle<Name> name = Handle<Name>()); |
| 25 | |
| 26 | |
| 27 | MaybeHandle<Object> Instantiate(Isolate* isolate, Handle<Object> data, |
| 28 | Handle<Name> name = Handle<Name>()) { |
| 29 | if (data->IsFunctionTemplateInfo()) { |
| 30 | return InstantiateFunction(isolate, |
| 31 | Handle<FunctionTemplateInfo>::cast(data), name); |
| 32 | } else if (data->IsObjectTemplateInfo()) { |
| 33 | return InstantiateObject(isolate, Handle<ObjectTemplateInfo>::cast(data)); |
| 34 | } else { |
| 35 | return data; |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | |
| 40 | MaybeHandle<Object> DefineAccessorProperty(Isolate* isolate, |
| 41 | Handle<JSObject> object, |
| 42 | Handle<Name> name, |
| 43 | Handle<Object> getter, |
| 44 | Handle<Object> setter, |
| 45 | PropertyAttributes attributes) { |
| 46 | if (!getter->IsUndefined()) { |
| 47 | ASSIGN_RETURN_ON_EXCEPTION( |
| 48 | isolate, getter, |
| 49 | InstantiateFunction(isolate, |
| 50 | Handle<FunctionTemplateInfo>::cast(getter)), |
| 51 | Object); |
| 52 | } |
| 53 | if (!setter->IsUndefined()) { |
| 54 | ASSIGN_RETURN_ON_EXCEPTION( |
| 55 | isolate, setter, |
| 56 | InstantiateFunction(isolate, |
| 57 | Handle<FunctionTemplateInfo>::cast(setter)), |
| 58 | Object); |
| 59 | } |
| 60 | RETURN_ON_EXCEPTION(isolate, JSObject::DefineAccessor(object, name, getter, |
| 61 | setter, attributes), |
| 62 | Object); |
| 63 | return object; |
| 64 | } |
| 65 | |
| 66 | |
| 67 | MaybeHandle<Object> DefineDataProperty(Isolate* isolate, |
| 68 | Handle<JSObject> object, |
| 69 | Handle<Name> name, |
| 70 | Handle<Object> prop_data, |
| 71 | PropertyAttributes attributes) { |
| 72 | Handle<Object> value; |
| 73 | ASSIGN_RETURN_ON_EXCEPTION(isolate, value, |
| 74 | Instantiate(isolate, prop_data, name), Object); |
| 75 | |
| 76 | LookupIterator it = LookupIterator::PropertyOrElement( |
| 77 | isolate, object, name, LookupIterator::OWN_SKIP_INTERCEPTOR); |
| 78 | |
| 79 | #ifdef DEBUG |
| 80 | Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it); |
| 81 | DCHECK(maybe.IsJust()); |
| 82 | if (it.IsFound()) { |
| 83 | THROW_NEW_ERROR( |
| 84 | isolate, |
| 85 | NewTypeError(MessageTemplate::kDuplicateTemplateProperty, name), |
| 86 | Object); |
| 87 | } |
| 88 | #endif |
| 89 | |
| 90 | MAYBE_RETURN_NULL( |
| 91 | Object::AddDataProperty(&it, value, attributes, Object::THROW_ON_ERROR, |
| 92 | Object::CERTAINLY_NOT_STORE_FROM_KEYED)); |
| 93 | return value; |
| 94 | } |
| 95 | |
| 96 | |
| 97 | void DisableAccessChecks(Isolate* isolate, Handle<JSObject> object) { |
| 98 | Handle<Map> old_map(object->map()); |
| 99 | // Copy map so it won't interfere constructor's initial map. |
| 100 | Handle<Map> new_map = Map::Copy(old_map, "DisableAccessChecks"); |
| 101 | new_map->set_is_access_check_needed(false); |
| 102 | JSObject::MigrateToMap(Handle<JSObject>::cast(object), new_map); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | void EnableAccessChecks(Isolate* isolate, Handle<JSObject> object) { |
| 107 | Handle<Map> old_map(object->map()); |
| 108 | // Copy map so it won't interfere constructor's initial map. |
| 109 | Handle<Map> new_map = Map::Copy(old_map, "EnableAccessChecks"); |
| 110 | new_map->set_is_access_check_needed(true); |
| 111 | JSObject::MigrateToMap(object, new_map); |
| 112 | } |
| 113 | |
| 114 | |
| 115 | class AccessCheckDisableScope { |
| 116 | public: |
| 117 | AccessCheckDisableScope(Isolate* isolate, Handle<JSObject> obj) |
| 118 | : isolate_(isolate), |
| 119 | disabled_(obj->map()->is_access_check_needed()), |
| 120 | obj_(obj) { |
| 121 | if (disabled_) { |
| 122 | DisableAccessChecks(isolate_, obj_); |
| 123 | } |
| 124 | } |
| 125 | ~AccessCheckDisableScope() { |
| 126 | if (disabled_) { |
| 127 | EnableAccessChecks(isolate_, obj_); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | private: |
| 132 | Isolate* isolate_; |
| 133 | const bool disabled_; |
| 134 | Handle<JSObject> obj_; |
| 135 | }; |
| 136 | |
| 137 | |
| 138 | Object* GetIntrinsic(Isolate* isolate, v8::Intrinsic intrinsic) { |
| 139 | Handle<Context> native_context = isolate->native_context(); |
| 140 | DCHECK(!native_context.is_null()); |
| 141 | switch (intrinsic) { |
| 142 | #define GET_INTRINSIC_VALUE(name, iname) \ |
| 143 | case v8::k##name: \ |
| 144 | return native_context->iname(); |
| 145 | V8_INTRINSICS_LIST(GET_INTRINSIC_VALUE) |
| 146 | #undef GET_INTRINSIC_VALUE |
| 147 | } |
| 148 | return nullptr; |
| 149 | } |
| 150 | |
| 151 | |
| 152 | MaybeHandle<JSObject> ConfigureInstance(Isolate* isolate, Handle<JSObject> obj, |
| 153 | Handle<TemplateInfo> data) { |
| 154 | auto property_list = handle(data->property_list(), isolate); |
| 155 | if (property_list->IsUndefined()) return obj; |
| 156 | // TODO(dcarney): just use a FixedArray here. |
| 157 | NeanderArray properties(property_list); |
| 158 | if (properties.length() == 0) return obj; |
| 159 | HandleScope scope(isolate); |
| 160 | // Disable access checks while instantiating the object. |
| 161 | AccessCheckDisableScope access_check_scope(isolate, obj); |
| 162 | |
| 163 | int i = 0; |
| 164 | for (int c = 0; c < data->number_of_properties(); c++) { |
| 165 | auto name = handle(Name::cast(properties.get(i++)), isolate); |
| 166 | auto bit = handle(properties.get(i++), isolate); |
| 167 | if (bit->IsSmi()) { |
| 168 | PropertyDetails details(Smi::cast(*bit)); |
| 169 | PropertyAttributes attributes = details.attributes(); |
| 170 | PropertyKind kind = details.kind(); |
| 171 | |
| 172 | if (kind == kData) { |
| 173 | auto prop_data = handle(properties.get(i++), isolate); |
| 174 | |
| 175 | RETURN_ON_EXCEPTION(isolate, DefineDataProperty(isolate, obj, name, |
| 176 | prop_data, attributes), |
| 177 | JSObject); |
| 178 | } else { |
| 179 | auto getter = handle(properties.get(i++), isolate); |
| 180 | auto setter = handle(properties.get(i++), isolate); |
| 181 | RETURN_ON_EXCEPTION(isolate, |
| 182 | DefineAccessorProperty(isolate, obj, name, getter, |
| 183 | setter, attributes), |
| 184 | JSObject); |
| 185 | } |
| 186 | } else { |
| 187 | // Intrinsic data property --- Get appropriate value from the current |
| 188 | // context. |
| 189 | PropertyDetails details(Smi::cast(properties.get(i++))); |
| 190 | PropertyAttributes attributes = details.attributes(); |
| 191 | DCHECK_EQ(kData, details.kind()); |
| 192 | |
| 193 | v8::Intrinsic intrinsic = |
| 194 | static_cast<v8::Intrinsic>(Smi::cast(properties.get(i++))->value()); |
| 195 | auto prop_data = handle(GetIntrinsic(isolate, intrinsic), isolate); |
| 196 | |
| 197 | RETURN_ON_EXCEPTION(isolate, DefineDataProperty(isolate, obj, name, |
| 198 | prop_data, attributes), |
| 199 | JSObject); |
| 200 | } |
| 201 | } |
| 202 | return obj; |
| 203 | } |
| 204 | |
| 205 | |
| 206 | MaybeHandle<JSObject> InstantiateObject(Isolate* isolate, |
| 207 | Handle<ObjectTemplateInfo> data) { |
| 208 | // Enter a new scope. Recursion could otherwise create a lot of handles. |
| 209 | HandleScope scope(isolate); |
| 210 | // Fast path. |
| 211 | Handle<JSObject> result; |
| 212 | auto info = Handle<ObjectTemplateInfo>::cast(data); |
| 213 | auto constructor = handle(info->constructor(), isolate); |
| 214 | Handle<JSFunction> cons; |
| 215 | if (constructor->IsUndefined()) { |
| 216 | cons = isolate->object_function(); |
| 217 | } else { |
| 218 | auto cons_templ = Handle<FunctionTemplateInfo>::cast(constructor); |
| 219 | ASSIGN_RETURN_ON_EXCEPTION( |
| 220 | isolate, cons, InstantiateFunction(isolate, cons_templ), JSFunction); |
| 221 | } |
| 222 | auto object = isolate->factory()->NewJSObject(cons); |
| 223 | ASSIGN_RETURN_ON_EXCEPTION( |
| 224 | isolate, result, ConfigureInstance(isolate, object, info), JSFunction); |
| 225 | // TODO(dcarney): is this necessary? |
| 226 | JSObject::MigrateSlowToFast(result, 0, "ApiNatives::InstantiateObject"); |
| 227 | return scope.CloseAndEscape(result); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | void CacheFunction(Isolate* isolate, Handle<Smi> serial_number, |
| 232 | Handle<JSFunction> function) { |
| 233 | auto cache = isolate->function_cache(); |
| 234 | auto new_cache = ObjectHashTable::Put(cache, serial_number, function); |
| 235 | isolate->native_context()->set_function_cache(*new_cache); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | void UncacheFunction(Isolate* isolate, Handle<Smi> serial_number) { |
| 240 | auto cache = isolate->function_cache(); |
| 241 | bool was_present = false; |
| 242 | auto new_cache = ObjectHashTable::Remove(cache, serial_number, &was_present); |
| 243 | DCHECK(was_present); |
| 244 | isolate->native_context()->set_function_cache(*new_cache); |
| 245 | } |
| 246 | |
| 247 | |
| 248 | MaybeHandle<JSFunction> InstantiateFunction(Isolate* isolate, |
| 249 | Handle<FunctionTemplateInfo> data, |
| 250 | Handle<Name> name) { |
| 251 | auto serial_number = handle(Smi::cast(data->serial_number()), isolate); |
| 252 | // Probe cache. |
| 253 | if (!data->do_not_cache()) { |
| 254 | auto cache = isolate->function_cache(); |
| 255 | Object* element = cache->Lookup(serial_number); |
| 256 | if (element->IsJSFunction()) { |
| 257 | return handle(JSFunction::cast(element), isolate); |
| 258 | } |
| 259 | } |
| 260 | // Enter a new scope. Recursion could otherwise create a lot of handles. |
| 261 | HandleScope scope(isolate); |
| 262 | Handle<JSObject> prototype; |
| 263 | if (!data->remove_prototype()) { |
| 264 | auto prototype_templ = handle(data->prototype_template(), isolate); |
| 265 | if (prototype_templ->IsUndefined()) { |
| 266 | prototype = isolate->factory()->NewJSObject(isolate->object_function()); |
| 267 | } else { |
| 268 | ASSIGN_RETURN_ON_EXCEPTION( |
| 269 | isolate, prototype, |
| 270 | InstantiateObject(isolate, |
| 271 | Handle<ObjectTemplateInfo>::cast(prototype_templ)), |
| 272 | JSFunction); |
| 273 | } |
| 274 | auto parent = handle(data->parent_template(), isolate); |
| 275 | if (!parent->IsUndefined()) { |
| 276 | Handle<JSFunction> parent_instance; |
| 277 | ASSIGN_RETURN_ON_EXCEPTION( |
| 278 | isolate, parent_instance, |
| 279 | InstantiateFunction(isolate, |
| 280 | Handle<FunctionTemplateInfo>::cast(parent)), |
| 281 | JSFunction); |
| 282 | // TODO(dcarney): decide what to do here. |
| 283 | Handle<Object> parent_prototype; |
| 284 | ASSIGN_RETURN_ON_EXCEPTION( |
| 285 | isolate, parent_prototype, |
| 286 | JSObject::GetProperty(parent_instance, |
| 287 | isolate->factory()->prototype_string()), |
| 288 | JSFunction); |
| 289 | MAYBE_RETURN(JSObject::SetPrototype(prototype, parent_prototype, false, |
| 290 | Object::THROW_ON_ERROR), |
| 291 | MaybeHandle<JSFunction>()); |
| 292 | } |
| 293 | } |
| 294 | auto function = ApiNatives::CreateApiFunction( |
| 295 | isolate, data, prototype, ApiNatives::JavaScriptObjectType); |
| 296 | if (!name.is_null() && name->IsString()) { |
| 297 | function->shared()->set_name(*name); |
| 298 | } |
| 299 | if (!data->do_not_cache()) { |
| 300 | // Cache the function. |
| 301 | CacheFunction(isolate, serial_number, function); |
| 302 | } |
| 303 | auto result = ConfigureInstance(isolate, function, data); |
| 304 | if (result.is_null()) { |
| 305 | // Uncache on error. |
| 306 | if (!data->do_not_cache()) { |
| 307 | UncacheFunction(isolate, serial_number); |
| 308 | } |
| 309 | return MaybeHandle<JSFunction>(); |
| 310 | } |
| 311 | return scope.CloseAndEscape(function); |
| 312 | } |
| 313 | |
| 314 | |
| 315 | class InvokeScope { |
| 316 | public: |
| 317 | explicit InvokeScope(Isolate* isolate) |
| 318 | : isolate_(isolate), save_context_(isolate) {} |
| 319 | ~InvokeScope() { |
| 320 | bool has_exception = isolate_->has_pending_exception(); |
| 321 | if (has_exception) { |
| 322 | isolate_->ReportPendingMessages(); |
| 323 | } else { |
| 324 | isolate_->clear_pending_message(); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | private: |
| 329 | Isolate* isolate_; |
| 330 | SaveContext save_context_; |
| 331 | }; |
| 332 | |
| 333 | |
| 334 | void AddPropertyToPropertyList(Isolate* isolate, Handle<TemplateInfo> templ, |
| 335 | int length, Handle<Object>* data) { |
| 336 | auto list = handle(templ->property_list(), isolate); |
| 337 | if (list->IsUndefined()) { |
| 338 | list = NeanderArray(isolate).value(); |
| 339 | templ->set_property_list(*list); |
| 340 | } |
| 341 | templ->set_number_of_properties(templ->number_of_properties() + 1); |
| 342 | NeanderArray array(list); |
| 343 | for (int i = 0; i < length; i++) { |
| 344 | Handle<Object> value = |
| 345 | data[i].is_null() |
| 346 | ? Handle<Object>::cast(isolate->factory()->undefined_value()) |
| 347 | : data[i]; |
| 348 | array.add(isolate, value); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | } // namespace |
| 353 | |
| 354 | |
| 355 | MaybeHandle<JSFunction> ApiNatives::InstantiateFunction( |
| 356 | Handle<FunctionTemplateInfo> data) { |
| 357 | Isolate* isolate = data->GetIsolate(); |
| 358 | InvokeScope invoke_scope(isolate); |
| 359 | return ::v8::internal::InstantiateFunction(isolate, data); |
| 360 | } |
| 361 | |
| 362 | |
| 363 | MaybeHandle<JSObject> ApiNatives::InstantiateObject( |
| 364 | Handle<ObjectTemplateInfo> data) { |
| 365 | Isolate* isolate = data->GetIsolate(); |
| 366 | InvokeScope invoke_scope(isolate); |
| 367 | return ::v8::internal::InstantiateObject(isolate, data); |
| 368 | } |
| 369 | |
| 370 | |
| 371 | MaybeHandle<FunctionTemplateInfo> ApiNatives::ConfigureInstance( |
| 372 | Isolate* isolate, Handle<FunctionTemplateInfo> desc, |
| 373 | Handle<JSObject> instance) { |
| 374 | // Configure the instance by adding the properties specified by the |
| 375 | // instance template. |
| 376 | if (desc->instance_template()->IsUndefined()) return desc; |
| 377 | InvokeScope invoke_scope(isolate); |
| 378 | Handle<ObjectTemplateInfo> instance_template( |
| 379 | ObjectTemplateInfo::cast(desc->instance_template()), isolate); |
| 380 | RETURN_ON_EXCEPTION(isolate, ::v8::internal::ConfigureInstance( |
| 381 | isolate, instance, instance_template), |
| 382 | FunctionTemplateInfo); |
| 383 | return desc; |
| 384 | } |
| 385 | |
| 386 | |
| 387 | void ApiNatives::AddDataProperty(Isolate* isolate, Handle<TemplateInfo> info, |
| 388 | Handle<Name> name, Handle<Object> value, |
| 389 | PropertyAttributes attributes) { |
| 390 | const int kSize = 3; |
| 391 | PropertyDetails details(attributes, DATA, 0, PropertyCellType::kNoCell); |
| 392 | auto details_handle = handle(details.AsSmi(), isolate); |
| 393 | Handle<Object> data[kSize] = {name, details_handle, value}; |
| 394 | AddPropertyToPropertyList(isolate, info, kSize, data); |
| 395 | } |
| 396 | |
| 397 | |
| 398 | void ApiNatives::AddDataProperty(Isolate* isolate, Handle<TemplateInfo> info, |
| 399 | Handle<Name> name, v8::Intrinsic intrinsic, |
| 400 | PropertyAttributes attributes) { |
| 401 | const int kSize = 4; |
| 402 | auto value = handle(Smi::FromInt(intrinsic), isolate); |
| 403 | auto intrinsic_marker = isolate->factory()->true_value(); |
| 404 | PropertyDetails details(attributes, DATA, 0, PropertyCellType::kNoCell); |
| 405 | auto details_handle = handle(details.AsSmi(), isolate); |
| 406 | Handle<Object> data[kSize] = {name, intrinsic_marker, details_handle, value}; |
| 407 | AddPropertyToPropertyList(isolate, info, kSize, data); |
| 408 | } |
| 409 | |
| 410 | |
| 411 | void ApiNatives::AddAccessorProperty(Isolate* isolate, |
| 412 | Handle<TemplateInfo> info, |
| 413 | Handle<Name> name, |
| 414 | Handle<FunctionTemplateInfo> getter, |
| 415 | Handle<FunctionTemplateInfo> setter, |
| 416 | PropertyAttributes attributes) { |
| 417 | const int kSize = 4; |
| 418 | PropertyDetails details(attributes, ACCESSOR, 0, PropertyCellType::kNoCell); |
| 419 | auto details_handle = handle(details.AsSmi(), isolate); |
| 420 | Handle<Object> data[kSize] = {name, details_handle, getter, setter}; |
| 421 | AddPropertyToPropertyList(isolate, info, kSize, data); |
| 422 | } |
| 423 | |
| 424 | |
| 425 | void ApiNatives::AddNativeDataProperty(Isolate* isolate, |
| 426 | Handle<TemplateInfo> info, |
| 427 | Handle<AccessorInfo> property) { |
| 428 | auto list = handle(info->property_accessors(), isolate); |
| 429 | if (list->IsUndefined()) { |
| 430 | list = NeanderArray(isolate).value(); |
| 431 | info->set_property_accessors(*list); |
| 432 | } |
| 433 | NeanderArray array(list); |
| 434 | array.add(isolate, property); |
| 435 | } |
| 436 | |
| 437 | |
| 438 | Handle<JSFunction> ApiNatives::CreateApiFunction( |
| 439 | Isolate* isolate, Handle<FunctionTemplateInfo> obj, |
| 440 | Handle<Object> prototype, ApiInstanceType instance_type) { |
| 441 | Handle<Code> code; |
| 442 | if (obj->call_code()->IsCallHandlerInfo() && |
| 443 | CallHandlerInfo::cast(obj->call_code())->fast_handler()->IsCode()) { |
| 444 | code = isolate->builtins()->HandleFastApiCall(); |
| 445 | } else { |
| 446 | code = isolate->builtins()->HandleApiCall(); |
| 447 | } |
| 448 | Handle<Code> construct_stub = |
| 449 | prototype.is_null() ? isolate->builtins()->ConstructedNonConstructable() |
| 450 | : isolate->builtins()->JSConstructStubApi(); |
| 451 | |
| 452 | obj->set_instantiated(true); |
| 453 | Handle<JSFunction> result; |
| 454 | if (obj->remove_prototype()) { |
| 455 | result = isolate->factory()->NewFunctionWithoutPrototype( |
| 456 | isolate->factory()->empty_string(), code); |
| 457 | } else { |
| 458 | int internal_field_count = 0; |
| 459 | if (!obj->instance_template()->IsUndefined()) { |
| 460 | Handle<ObjectTemplateInfo> instance_template = Handle<ObjectTemplateInfo>( |
| 461 | ObjectTemplateInfo::cast(obj->instance_template())); |
| 462 | internal_field_count = |
| 463 | Smi::cast(instance_template->internal_field_count())->value(); |
| 464 | } |
| 465 | |
| 466 | // TODO(svenpanne) Kill ApiInstanceType and refactor things by generalizing |
| 467 | // JSObject::GetHeaderSize. |
| 468 | int instance_size = kPointerSize * internal_field_count; |
| 469 | InstanceType type; |
| 470 | switch (instance_type) { |
| 471 | case JavaScriptObjectType: |
| 472 | type = JS_OBJECT_TYPE; |
| 473 | instance_size += JSObject::kHeaderSize; |
| 474 | break; |
| 475 | case GlobalObjectType: |
| 476 | type = JS_GLOBAL_OBJECT_TYPE; |
| 477 | instance_size += JSGlobalObject::kSize; |
| 478 | break; |
| 479 | case GlobalProxyType: |
| 480 | type = JS_GLOBAL_PROXY_TYPE; |
| 481 | instance_size += JSGlobalProxy::kSize; |
| 482 | break; |
| 483 | default: |
| 484 | UNREACHABLE(); |
| 485 | type = JS_OBJECT_TYPE; // Keep the compiler happy. |
| 486 | break; |
| 487 | } |
| 488 | |
| 489 | result = isolate->factory()->NewFunction( |
| 490 | isolate->factory()->empty_string(), code, prototype, type, |
| 491 | instance_size, obj->read_only_prototype(), true); |
| 492 | } |
| 493 | |
| 494 | result->shared()->set_length(obj->length()); |
| 495 | Handle<Object> class_name(obj->class_name(), isolate); |
| 496 | if (class_name->IsString()) { |
| 497 | result->shared()->set_instance_class_name(*class_name); |
| 498 | result->shared()->set_name(*class_name); |
| 499 | } |
| 500 | result->shared()->set_function_data(*obj); |
| 501 | result->shared()->set_construct_stub(*construct_stub); |
| 502 | result->shared()->DontAdaptArguments(); |
| 503 | |
| 504 | if (obj->remove_prototype()) { |
| 505 | DCHECK(result->shared()->IsApiFunction()); |
| 506 | DCHECK(!result->has_initial_map()); |
| 507 | DCHECK(!result->has_prototype()); |
| 508 | return result; |
| 509 | } |
| 510 | |
| 511 | #ifdef DEBUG |
| 512 | LookupIterator it(handle(JSObject::cast(result->prototype())), |
| 513 | isolate->factory()->constructor_string(), |
| 514 | LookupIterator::OWN_SKIP_INTERCEPTOR); |
| 515 | MaybeHandle<Object> maybe_prop = Object::GetProperty(&it); |
| 516 | DCHECK(it.IsFound()); |
| 517 | DCHECK(maybe_prop.ToHandleChecked().is_identical_to(result)); |
| 518 | #endif |
| 519 | |
| 520 | // Down from here is only valid for API functions that can be used as a |
| 521 | // constructor (don't set the "remove prototype" flag). |
| 522 | |
| 523 | Handle<Map> map(result->initial_map()); |
| 524 | |
| 525 | // Mark as undetectable if needed. |
| 526 | if (obj->undetectable()) { |
| 527 | map->set_is_undetectable(); |
| 528 | } |
| 529 | |
| 530 | // Mark as hidden for the __proto__ accessor if needed. |
| 531 | if (obj->hidden_prototype()) { |
| 532 | map->set_is_hidden_prototype(); |
| 533 | } |
| 534 | |
| 535 | // Mark as needs_access_check if needed. |
| 536 | if (obj->needs_access_check()) { |
| 537 | map->set_is_access_check_needed(true); |
| 538 | } |
| 539 | |
| 540 | // Set interceptor information in the map. |
| 541 | if (!obj->named_property_handler()->IsUndefined()) { |
| 542 | map->set_has_named_interceptor(); |
| 543 | } |
| 544 | if (!obj->indexed_property_handler()->IsUndefined()) { |
| 545 | map->set_has_indexed_interceptor(); |
| 546 | } |
| 547 | |
| 548 | // Mark instance as callable in the map. |
| 549 | if (!obj->instance_call_handler()->IsUndefined()) { |
| 550 | map->set_is_callable(); |
| 551 | map->set_is_constructor(); |
| 552 | } |
| 553 | |
| 554 | // Recursively copy parent instance templates' accessors, |
| 555 | // 'data' may be modified. |
| 556 | int max_number_of_additional_properties = 0; |
| 557 | int max_number_of_static_properties = 0; |
| 558 | FunctionTemplateInfo* info = *obj; |
| 559 | while (true) { |
| 560 | if (!info->instance_template()->IsUndefined()) { |
| 561 | Object* props = ObjectTemplateInfo::cast(info->instance_template()) |
| 562 | ->property_accessors(); |
| 563 | if (!props->IsUndefined()) { |
| 564 | Handle<Object> props_handle(props, isolate); |
| 565 | NeanderArray props_array(props_handle); |
| 566 | max_number_of_additional_properties += props_array.length(); |
| 567 | } |
| 568 | } |
| 569 | if (!info->property_accessors()->IsUndefined()) { |
| 570 | Object* props = info->property_accessors(); |
| 571 | if (!props->IsUndefined()) { |
| 572 | Handle<Object> props_handle(props, isolate); |
| 573 | NeanderArray props_array(props_handle); |
| 574 | max_number_of_static_properties += props_array.length(); |
| 575 | } |
| 576 | } |
| 577 | Object* parent = info->parent_template(); |
| 578 | if (parent->IsUndefined()) break; |
| 579 | info = FunctionTemplateInfo::cast(parent); |
| 580 | } |
| 581 | |
| 582 | Map::EnsureDescriptorSlack(map, max_number_of_additional_properties); |
| 583 | |
| 584 | // Use a temporary FixedArray to acculumate static accessors |
| 585 | int valid_descriptors = 0; |
| 586 | Handle<FixedArray> array; |
| 587 | if (max_number_of_static_properties > 0) { |
| 588 | array = isolate->factory()->NewFixedArray(max_number_of_static_properties); |
| 589 | } |
| 590 | |
| 591 | while (true) { |
| 592 | // Install instance descriptors |
| 593 | if (!obj->instance_template()->IsUndefined()) { |
| 594 | Handle<ObjectTemplateInfo> instance = Handle<ObjectTemplateInfo>( |
| 595 | ObjectTemplateInfo::cast(obj->instance_template()), isolate); |
| 596 | Handle<Object> props = |
| 597 | Handle<Object>(instance->property_accessors(), isolate); |
| 598 | if (!props->IsUndefined()) { |
| 599 | Map::AppendCallbackDescriptors(map, props); |
| 600 | } |
| 601 | } |
| 602 | // Accumulate static accessors |
| 603 | if (!obj->property_accessors()->IsUndefined()) { |
| 604 | Handle<Object> props = Handle<Object>(obj->property_accessors(), isolate); |
| 605 | valid_descriptors = |
| 606 | AccessorInfo::AppendUnique(props, array, valid_descriptors); |
| 607 | } |
| 608 | // Climb parent chain |
| 609 | Handle<Object> parent = Handle<Object>(obj->parent_template(), isolate); |
| 610 | if (parent->IsUndefined()) break; |
| 611 | obj = Handle<FunctionTemplateInfo>::cast(parent); |
| 612 | } |
| 613 | |
| 614 | // Install accumulated static accessors |
| 615 | for (int i = 0; i < valid_descriptors; i++) { |
| 616 | Handle<AccessorInfo> accessor(AccessorInfo::cast(array->get(i))); |
| 617 | JSObject::SetAccessor(result, accessor).Assert(); |
| 618 | } |
| 619 | |
| 620 | DCHECK(result->shared()->IsApiFunction()); |
| 621 | return result; |
| 622 | } |
| 623 | |
| 624 | } // namespace internal |
| 625 | } // namespace v8 |