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.
7 #include "src/arguments.h"
8 #include "src/bootstrapper.h"
9 #include "src/debug/debug.h"
10 #include "src/messages.h"
11 #include "src/runtime/runtime.h"
12 #include "src/runtime/runtime-utils.h"
18 MaybeHandle<Name> Runtime::ToName(Isolate* isolate, Handle<Object> key) {
20 return Handle<Name>::cast(key);
22 Handle<Object> converted;
23 ASSIGN_RETURN_ON_EXCEPTION(isolate, converted,
24 Execution::ToString(isolate, key), Name);
25 return Handle<Name>::cast(converted);
30 MaybeHandle<Object> Runtime::GetObjectProperty(Isolate* isolate,
31 Handle<Object> object,
33 LanguageMode language_mode) {
34 if (object->IsUndefined() || object->IsNull()) {
37 NewTypeError(MessageTemplate::kNonObjectPropertyLoad, key, object),
41 // Check if the given key is an array index.
43 if (key->ToArrayIndex(&index)) {
44 return Object::GetElement(isolate, object, index, language_mode);
47 // Convert the key to a name - possibly by calling back into JavaScript.
49 ASSIGN_RETURN_ON_EXCEPTION(isolate, name, ToName(isolate, key), Object);
51 // Check if the name is trivially convertible to an index and get
53 // TODO(verwaest): Make sure GetProperty(LookupIterator*) can handle this, and
54 // remove the special casing here.
55 if (name->AsArrayIndex(&index)) {
56 return Object::GetElement(isolate, object, index);
58 return Object::GetProperty(object, name, language_mode);
63 MaybeHandle<Object> Runtime::KeyedGetObjectProperty(
64 Isolate* isolate, Handle<Object> receiver_obj, Handle<Object> key_obj,
65 LanguageMode language_mode) {
66 // Fast cases for getting named properties of the receiver JSObject
69 // The global proxy objects has to be excluded since LookupOwn on
70 // the global proxy object can return a valid result even though the
71 // global proxy object never has properties. This is the case
72 // because the global proxy object forwards everything to its hidden
73 // prototype including own lookups.
75 // Additionally, we need to make sure that we do not cache results
76 // for objects that require access checks.
77 if (receiver_obj->IsJSObject()) {
78 if (!receiver_obj->IsJSGlobalProxy() &&
79 !receiver_obj->IsAccessCheckNeeded() && key_obj->IsName()) {
80 DisallowHeapAllocation no_allocation;
81 Handle<JSObject> receiver = Handle<JSObject>::cast(receiver_obj);
82 Handle<Name> key = Handle<Name>::cast(key_obj);
83 if (receiver->IsGlobalObject()) {
84 // Attempt dictionary lookup.
85 GlobalDictionary* dictionary = receiver->global_dictionary();
86 int entry = dictionary->FindEntry(key);
87 if (entry != GlobalDictionary::kNotFound) {
88 DCHECK(dictionary->ValueAt(entry)->IsPropertyCell());
89 PropertyCell* cell = PropertyCell::cast(dictionary->ValueAt(entry));
90 if (cell->property_details().type() == DATA) {
91 Object* value = cell->value();
92 if (!value->IsTheHole()) return Handle<Object>(value, isolate);
93 // If value is the hole (meaning, absent) do the general lookup.
96 } else if (!receiver->HasFastProperties()) {
97 // Attempt dictionary lookup.
98 NameDictionary* dictionary = receiver->property_dictionary();
99 int entry = dictionary->FindEntry(key);
100 if ((entry != NameDictionary::kNotFound) &&
101 (dictionary->DetailsAt(entry).type() == DATA)) {
102 Object* value = dictionary->ValueAt(entry);
103 return Handle<Object>(value, isolate);
106 } else if (key_obj->IsSmi()) {
107 // JSObject without a name key. If the key is a Smi, check for a
108 // definite out-of-bounds access to elements, which is a strong indicator
109 // that subsequent accesses will also call the runtime. Proactively
110 // transition elements to FAST_*_ELEMENTS to avoid excessive boxing of
111 // doubles for those future calls in the case that the elements would
112 // become FAST_DOUBLE_ELEMENTS.
113 Handle<JSObject> js_object = Handle<JSObject>::cast(receiver_obj);
114 ElementsKind elements_kind = js_object->GetElementsKind();
115 if (IsFastDoubleElementsKind(elements_kind)) {
116 if (Smi::cast(*key_obj)->value() >= js_object->elements()->length()) {
117 elements_kind = IsFastHoleyElementsKind(elements_kind)
118 ? FAST_HOLEY_ELEMENTS
120 JSObject::TransitionElementsKind(js_object, elements_kind);
123 DCHECK(IsFastSmiOrObjectElementsKind(elements_kind) ||
124 !IsFastElementsKind(elements_kind));
127 } else if (receiver_obj->IsString() && key_obj->IsSmi()) {
128 // Fast case for string indexing using [] with a smi index.
129 Handle<String> str = Handle<String>::cast(receiver_obj);
130 int index = Handle<Smi>::cast(key_obj)->value();
131 if (index >= 0 && index < str->length()) {
132 Factory* factory = isolate->factory();
133 return factory->LookupSingleCharacterStringFromCode(
134 String::Flatten(str)->Get(index));
138 // Fall back to GetObjectProperty.
139 return GetObjectProperty(isolate, receiver_obj, key_obj, language_mode);
143 MaybeHandle<Object> Runtime::DeleteObjectProperty(Isolate* isolate,
144 Handle<JSReceiver> receiver,
146 LanguageMode language_mode) {
147 // Check if the given key is an array index.
149 if (key->ToArrayIndex(&index)) {
150 return JSReceiver::DeleteElement(receiver, index, language_mode);
154 ASSIGN_RETURN_ON_EXCEPTION(isolate, name, ToName(isolate, key), Object);
156 return JSReceiver::DeletePropertyOrElement(receiver, name, language_mode);
160 MaybeHandle<Object> Runtime::SetObjectProperty(Isolate* isolate,
161 Handle<Object> object,
163 Handle<Object> value,
164 LanguageMode language_mode) {
165 if (object->IsUndefined() || object->IsNull()) {
168 NewTypeError(MessageTemplate::kNonObjectPropertyStore, key, object),
172 // Check if the given key is an array index.
174 if (key->ToArrayIndex(&index)) {
175 return Object::SetElement(isolate, object, index, value, language_mode);
179 ASSIGN_RETURN_ON_EXCEPTION(isolate, name, ToName(isolate, key), Object);
181 LookupIterator it = LookupIterator::PropertyOrElement(isolate, object, name);
182 return Object::SetProperty(&it, value, language_mode,
183 Object::MAY_BE_STORE_FROM_KEYED);
187 MaybeHandle<Object> Runtime::GetPrototype(Isolate* isolate,
188 Handle<Object> obj) {
189 // We don't expect access checks to be needed on JSProxy objects.
190 DCHECK(!obj->IsAccessCheckNeeded() || obj->IsJSObject());
191 PrototypeIterator iter(isolate, obj, PrototypeIterator::START_AT_RECEIVER);
193 if (PrototypeIterator::GetCurrent(iter)->IsAccessCheckNeeded() &&
195 Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter)))) {
196 return isolate->factory()->null_value();
198 iter.AdvanceIgnoringProxies();
199 if (PrototypeIterator::GetCurrent(iter)->IsJSProxy()) {
200 return PrototypeIterator::GetCurrent(iter);
202 } while (!iter.IsAtEnd(PrototypeIterator::END_AT_NON_HIDDEN));
203 return PrototypeIterator::GetCurrent(iter);
207 RUNTIME_FUNCTION(Runtime_GetPrototype) {
208 HandleScope scope(isolate);
209 DCHECK(args.length() == 1);
210 CONVERT_ARG_HANDLE_CHECKED(Object, obj, 0);
211 Handle<Object> result;
212 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
213 Runtime::GetPrototype(isolate, obj));
218 RUNTIME_FUNCTION(Runtime_InternalSetPrototype) {
219 HandleScope scope(isolate);
220 DCHECK(args.length() == 2);
221 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
222 CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1);
223 DCHECK(!obj->IsAccessCheckNeeded());
224 DCHECK(!obj->map()->is_observed());
225 Handle<Object> result;
226 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
227 isolate, result, JSObject::SetPrototype(obj, prototype, false));
232 RUNTIME_FUNCTION(Runtime_SetPrototype) {
233 HandleScope scope(isolate);
234 DCHECK(args.length() == 2);
235 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
236 CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1);
237 if (obj->IsAccessCheckNeeded() && !isolate->MayAccess(obj)) {
238 isolate->ReportFailedAccessCheck(obj);
239 RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
240 return isolate->heap()->undefined_value();
242 if (obj->map()->is_observed()) {
243 Handle<Object> old_value =
244 Object::GetPrototypeSkipHiddenPrototypes(isolate, obj);
245 Handle<Object> result;
246 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
247 isolate, result, JSObject::SetPrototype(obj, prototype, true));
249 Handle<Object> new_value =
250 Object::GetPrototypeSkipHiddenPrototypes(isolate, obj);
251 if (!new_value->SameValue(*old_value)) {
252 RETURN_FAILURE_ON_EXCEPTION(
253 isolate, JSObject::EnqueueChangeRecord(
254 obj, "setPrototype", isolate->factory()->proto_string(),
259 Handle<Object> result;
260 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
261 isolate, result, JSObject::SetPrototype(obj, prototype, true));
266 RUNTIME_FUNCTION(Runtime_IsInPrototypeChain) {
267 HandleScope shs(isolate);
268 DCHECK(args.length() == 2);
269 // See ECMA-262, section 15.3.5.3, page 88 (steps 5 - 8).
270 CONVERT_ARG_HANDLE_CHECKED(Object, O, 0);
271 CONVERT_ARG_HANDLE_CHECKED(Object, V, 1);
272 PrototypeIterator iter(isolate, V, PrototypeIterator::START_AT_RECEIVER);
274 iter.AdvanceIgnoringProxies();
275 if (iter.IsAtEnd()) return isolate->heap()->false_value();
276 if (iter.IsAtEnd(O)) return isolate->heap()->true_value();
281 // Enumerator used as indices into the array returned from GetOwnProperty
282 enum PropertyDescriptorIndices {
294 MUST_USE_RESULT static MaybeHandle<Object> GetOwnProperty(Isolate* isolate,
295 Handle<JSObject> obj,
297 Heap* heap = isolate->heap();
298 Factory* factory = isolate->factory();
300 PropertyAttributes attrs;
302 LookupIterator it = LookupIterator::PropertyOrElement(isolate, obj, name,
303 LookupIterator::HIDDEN);
304 Maybe<PropertyAttributes> maybe = JSObject::GetPropertyAttributes(&it);
306 if (!maybe.IsJust()) return MaybeHandle<Object>();
307 attrs = maybe.FromJust();
308 if (attrs == ABSENT) return factory->undefined_value();
310 DCHECK(!isolate->has_pending_exception());
311 Handle<FixedArray> elms = factory->NewFixedArray(DESCRIPTOR_SIZE);
312 elms->set(ENUMERABLE_INDEX, heap->ToBoolean((attrs & DONT_ENUM) == 0));
313 elms->set(CONFIGURABLE_INDEX, heap->ToBoolean((attrs & DONT_DELETE) == 0));
315 bool is_accessor_pair = it.state() == LookupIterator::ACCESSOR &&
316 it.GetAccessors()->IsAccessorPair();
317 elms->set(IS_ACCESSOR_INDEX, heap->ToBoolean(is_accessor_pair));
319 if (is_accessor_pair) {
320 Handle<AccessorPair> accessors =
321 Handle<AccessorPair>::cast(it.GetAccessors());
322 Handle<Object> getter(accessors->GetComponent(ACCESSOR_GETTER), isolate);
323 Handle<Object> setter(accessors->GetComponent(ACCESSOR_SETTER), isolate);
324 elms->set(GETTER_INDEX, *getter);
325 elms->set(SETTER_INDEX, *setter);
327 Handle<Object> value;
328 ASSIGN_RETURN_ON_EXCEPTION(isolate, value, Object::GetProperty(&it),
330 elms->set(WRITABLE_INDEX, heap->ToBoolean((attrs & READ_ONLY) == 0));
331 elms->set(VALUE_INDEX, *value);
334 return factory->NewJSArrayWithElements(elms);
338 // Returns an array with the property description:
339 // if args[1] is not a property on args[0]
341 // if args[1] is a data property on args[0]
342 // [false, value, Writeable, Enumerable, Configurable]
343 // if args[1] is an accessor on args[0]
344 // [true, GetFunction, SetFunction, Enumerable, Configurable]
345 RUNTIME_FUNCTION(Runtime_GetOwnProperty) {
346 HandleScope scope(isolate);
347 DCHECK(args.length() == 2);
348 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
349 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
350 Handle<Object> result;
351 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
352 GetOwnProperty(isolate, obj, name));
357 RUNTIME_FUNCTION(Runtime_PreventExtensions) {
358 HandleScope scope(isolate);
359 DCHECK(args.length() == 1);
360 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
361 Handle<Object> result;
362 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
363 JSObject::PreventExtensions(obj));
368 RUNTIME_FUNCTION(Runtime_IsExtensible) {
369 SealHandleScope shs(isolate);
370 DCHECK(args.length() == 1);
371 CONVERT_ARG_CHECKED(JSObject, obj, 0);
372 return isolate->heap()->ToBoolean(obj->IsExtensible());
376 RUNTIME_FUNCTION(Runtime_OptimizeObjectForAddingMultipleProperties) {
377 HandleScope scope(isolate);
378 DCHECK(args.length() == 2);
379 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
380 CONVERT_SMI_ARG_CHECKED(properties, 1);
381 // Conservative upper limit to prevent fuzz tests from going OOM.
382 RUNTIME_ASSERT(properties <= 100000);
383 if (object->HasFastProperties() && !object->IsJSGlobalProxy()) {
384 JSObject::NormalizeProperties(object, KEEP_INOBJECT_PROPERTIES, properties,
385 "OptimizeForAdding");
391 RUNTIME_FUNCTION(Runtime_ObjectFreeze) {
392 HandleScope scope(isolate);
393 DCHECK(args.length() == 1);
394 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
396 // %ObjectFreeze is a fast path and these cases are handled elsewhere.
397 RUNTIME_ASSERT(!object->HasSloppyArgumentsElements() &&
398 !object->map()->is_observed() && !object->IsJSProxy());
400 Handle<Object> result;
401 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, JSObject::Freeze(object));
406 RUNTIME_FUNCTION(Runtime_ObjectSeal) {
407 HandleScope scope(isolate);
408 DCHECK(args.length() == 1);
409 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
411 // %ObjectSeal is a fast path and these cases are handled elsewhere.
412 RUNTIME_ASSERT(!object->HasSloppyArgumentsElements() &&
413 !object->map()->is_observed() && !object->IsJSProxy());
415 Handle<Object> result;
416 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, JSObject::Seal(object));
421 RUNTIME_FUNCTION(Runtime_LoadGlobalViaContext) {
422 HandleScope scope(isolate);
423 DCHECK_EQ(1, args.length());
424 CONVERT_SMI_ARG_CHECKED(slot, 0);
426 // Go up context chain to the script context.
427 Handle<Context> script_context(isolate->context()->script_context(), isolate);
428 DCHECK(script_context->IsScriptContext());
429 DCHECK(script_context->get(slot)->IsPropertyCell());
431 // Lookup the named property on the global object.
432 Handle<ScopeInfo> scope_info(ScopeInfo::cast(script_context->extension()),
434 Handle<Name> name(scope_info->ContextSlotName(slot), isolate);
435 Handle<GlobalObject> global_object(script_context->global_object(), isolate);
436 LookupIterator it(global_object, name, LookupIterator::HIDDEN);
438 // Switch to fast mode only if there is a data property and it's not on
439 // a hidden prototype.
440 if (it.state() == LookupIterator::DATA &&
441 it.GetHolder<Object>().is_identical_to(global_object)) {
442 // Now update the cell in the script context.
443 Handle<PropertyCell> cell = it.GetPropertyCell();
444 script_context->set(slot, *cell);
446 // This is not a fast case, so keep this access in a slow mode.
447 // Store empty_property_cell here to release the outdated property cell.
448 script_context->set(slot, isolate->heap()->empty_property_cell());
451 Handle<Object> result;
452 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, Object::GetProperty(&it));
459 Object* StoreGlobalViaContext(Isolate* isolate, int slot, Handle<Object> value,
460 LanguageMode language_mode) {
461 // Go up context chain to the script context.
462 Handle<Context> script_context(isolate->context()->script_context(), isolate);
463 DCHECK(script_context->IsScriptContext());
464 DCHECK(script_context->get(slot)->IsPropertyCell());
466 // Lookup the named property on the global object.
467 Handle<ScopeInfo> scope_info(ScopeInfo::cast(script_context->extension()),
469 Handle<Name> name(scope_info->ContextSlotName(slot), isolate);
470 Handle<GlobalObject> global_object(script_context->global_object(), isolate);
471 LookupIterator it(global_object, name, LookupIterator::HIDDEN);
473 // Switch to fast mode only if there is a data property and it's not on
474 // a hidden prototype.
475 if (it.state() == LookupIterator::DATA &&
476 it.GetHolder<Object>().is_identical_to(global_object)) {
477 // Now update cell in the script context.
478 Handle<PropertyCell> cell = it.GetPropertyCell();
479 script_context->set(slot, *cell);
481 // This is not a fast case, so keep this access in a slow mode.
482 // Store empty_property_cell here to release the outdated property cell.
483 script_context->set(slot, isolate->heap()->empty_property_cell());
486 Handle<Object> result;
487 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
489 Object::SetProperty(&it, value, language_mode,
490 Object::CERTAINLY_NOT_STORE_FROM_KEYED));
497 RUNTIME_FUNCTION(Runtime_StoreGlobalViaContext_Sloppy) {
498 HandleScope scope(isolate);
499 DCHECK_EQ(2, args.length());
500 CONVERT_SMI_ARG_CHECKED(slot, 0);
501 CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
503 return StoreGlobalViaContext(isolate, slot, value, SLOPPY);
507 RUNTIME_FUNCTION(Runtime_StoreGlobalViaContext_Strict) {
508 HandleScope scope(isolate);
509 DCHECK_EQ(2, args.length());
510 CONVERT_SMI_ARG_CHECKED(slot, 0);
511 CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
513 return StoreGlobalViaContext(isolate, slot, value, STRICT);
517 RUNTIME_FUNCTION(Runtime_GetProperty) {
518 HandleScope scope(isolate);
519 DCHECK(args.length() == 2);
521 CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
522 CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
524 Handle<Object> result;
525 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
527 Runtime::GetObjectProperty(isolate, object, key, SLOPPY));
532 RUNTIME_FUNCTION(Runtime_GetPropertyStrong) {
533 HandleScope scope(isolate);
534 DCHECK(args.length() == 2);
536 CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
537 CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
539 Handle<Object> result;
540 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
542 Runtime::GetObjectProperty(isolate, object, key, STRONG));
547 // KeyedGetProperty is called from KeyedLoadIC::GenerateGeneric.
548 RUNTIME_FUNCTION(Runtime_KeyedGetProperty) {
549 HandleScope scope(isolate);
550 DCHECK(args.length() == 2);
552 CONVERT_ARG_HANDLE_CHECKED(Object, receiver_obj, 0);
553 CONVERT_ARG_HANDLE_CHECKED(Object, key_obj, 1);
555 Handle<Object> result;
556 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
558 Runtime::KeyedGetObjectProperty(isolate, receiver_obj, key_obj, SLOPPY));
563 RUNTIME_FUNCTION(Runtime_KeyedGetPropertyStrong) {
564 HandleScope scope(isolate);
565 DCHECK(args.length() == 2);
567 CONVERT_ARG_HANDLE_CHECKED(Object, receiver_obj, 0);
568 CONVERT_ARG_HANDLE_CHECKED(Object, key_obj, 1);
570 Handle<Object> result;
571 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
573 Runtime::KeyedGetObjectProperty(isolate, receiver_obj, key_obj, STRONG));
578 RUNTIME_FUNCTION(Runtime_AddNamedProperty) {
579 HandleScope scope(isolate);
580 RUNTIME_ASSERT(args.length() == 4);
582 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
583 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
584 CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
585 CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
589 DCHECK(!name->ToArrayIndex(&index));
590 LookupIterator it(object, name, LookupIterator::OWN_SKIP_INTERCEPTOR);
591 Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it);
592 if (!maybe.IsJust()) return isolate->heap()->exception();
593 RUNTIME_ASSERT(!it.IsFound());
596 Handle<Object> result;
597 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
599 JSObject::SetOwnPropertyIgnoreAttributes(object, name, value, attrs));
604 // Adds an element to an array.
605 // This is used to create an indexed data property into an array.
606 RUNTIME_FUNCTION(Runtime_AddElement) {
607 HandleScope scope(isolate);
608 RUNTIME_ASSERT(args.length() == 3);
610 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
611 CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
612 CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
615 CHECK(key->ToArrayIndex(&index));
618 LookupIterator it(isolate, object, index,
619 LookupIterator::OWN_SKIP_INTERCEPTOR);
620 Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it);
621 if (!maybe.IsJust()) return isolate->heap()->exception();
622 RUNTIME_ASSERT(!it.IsFound());
624 if (object->IsJSArray()) {
625 Handle<JSArray> array = Handle<JSArray>::cast(object);
626 RUNTIME_ASSERT(!JSArray::WouldChangeReadOnlyLength(array, index));
630 Handle<Object> result;
631 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
633 JSObject::SetOwnElementIgnoreAttributes(object, index, value, NONE));
638 RUNTIME_FUNCTION(Runtime_AppendElement) {
639 HandleScope scope(isolate);
640 RUNTIME_ASSERT(args.length() == 2);
642 CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
643 CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
646 CHECK(array->length()->ToArrayIndex(&index));
648 Handle<Object> result;
649 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
650 isolate, result, JSObject::AddDataElement(array, index, value, NONE));
651 JSObject::ValidateElements(array);
656 RUNTIME_FUNCTION(Runtime_SetProperty) {
657 HandleScope scope(isolate);
658 RUNTIME_ASSERT(args.length() == 4);
660 CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
661 CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
662 CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
663 CONVERT_LANGUAGE_MODE_ARG_CHECKED(language_mode_arg, 3);
664 LanguageMode language_mode = language_mode_arg;
666 Handle<Object> result;
667 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
669 Runtime::SetObjectProperty(isolate, object, key, value, language_mode));
674 RUNTIME_FUNCTION(Runtime_DeleteProperty) {
675 HandleScope scope(isolate);
676 DCHECK(args.length() == 3);
677 CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
678 CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
679 CONVERT_LANGUAGE_MODE_ARG_CHECKED(language_mode, 2);
680 Handle<Object> result;
681 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
683 Runtime::DeleteObjectProperty(isolate, receiver, key, language_mode));
688 static Object* HasOwnPropertyImplementation(Isolate* isolate,
689 Handle<JSObject> object,
691 Maybe<bool> maybe = JSReceiver::HasOwnProperty(object, key);
692 if (!maybe.IsJust()) return isolate->heap()->exception();
693 if (maybe.FromJust()) return isolate->heap()->true_value();
694 // Handle hidden prototypes. If there's a hidden prototype above this thing
695 // then we have to check it for properties, because they are supposed to
696 // look like they are on this object.
697 PrototypeIterator iter(isolate, object);
698 if (!iter.IsAtEnd() &&
699 Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter))
701 ->is_hidden_prototype()) {
702 // TODO(verwaest): The recursion is not necessary for keys that are array
703 // indices. Removing this.
704 return HasOwnPropertyImplementation(
705 isolate, Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter)),
708 RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
709 return isolate->heap()->false_value();
713 RUNTIME_FUNCTION(Runtime_HasOwnProperty) {
714 HandleScope scope(isolate);
715 DCHECK(args.length() == 2);
716 CONVERT_ARG_HANDLE_CHECKED(Object, object, 0)
717 CONVERT_ARG_HANDLE_CHECKED(Name, key, 1);
720 const bool key_is_array_index = key->AsArrayIndex(&index);
722 // Only JS objects can have properties.
723 if (object->IsJSObject()) {
724 Handle<JSObject> js_obj = Handle<JSObject>::cast(object);
725 // Fast case: either the key is a real named property or it is not
726 // an array index and there are no interceptors or hidden
728 Maybe<bool> maybe = Nothing<bool>();
729 if (key_is_array_index) {
730 maybe = JSObject::HasOwnElement(js_obj, index);
732 maybe = JSObject::HasRealNamedProperty(js_obj, key);
734 if (!maybe.IsJust()) return isolate->heap()->exception();
735 DCHECK(!isolate->has_pending_exception());
736 if (maybe.FromJust()) {
737 return isolate->heap()->true_value();
739 Map* map = js_obj->map();
740 if (!key_is_array_index && !map->has_named_interceptor() &&
741 !HeapObject::cast(map->prototype())->map()->is_hidden_prototype()) {
742 return isolate->heap()->false_value();
745 return HasOwnPropertyImplementation(isolate, Handle<JSObject>(js_obj),
747 } else if (object->IsString() && key_is_array_index) {
748 // Well, there is one exception: Handle [] on strings.
749 Handle<String> string = Handle<String>::cast(object);
750 if (index < static_cast<uint32_t>(string->length())) {
751 return isolate->heap()->true_value();
754 return isolate->heap()->false_value();
758 RUNTIME_FUNCTION(Runtime_HasProperty) {
759 HandleScope scope(isolate);
760 DCHECK(args.length() == 2);
761 CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
762 CONVERT_ARG_HANDLE_CHECKED(Name, key, 1);
764 Maybe<bool> maybe = JSReceiver::HasProperty(receiver, key);
765 if (!maybe.IsJust()) return isolate->heap()->exception();
766 return isolate->heap()->ToBoolean(maybe.FromJust());
770 RUNTIME_FUNCTION(Runtime_HasElement) {
771 HandleScope scope(isolate);
772 DCHECK(args.length() == 2);
773 CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
774 CONVERT_SMI_ARG_CHECKED(index, 1);
776 Maybe<bool> maybe = JSReceiver::HasElement(receiver, index);
777 if (!maybe.IsJust()) return isolate->heap()->exception();
778 return isolate->heap()->ToBoolean(maybe.FromJust());
782 RUNTIME_FUNCTION(Runtime_IsPropertyEnumerable) {
783 HandleScope scope(isolate);
784 DCHECK(args.length() == 2);
786 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
787 CONVERT_ARG_HANDLE_CHECKED(Name, key, 1);
789 Maybe<PropertyAttributes> maybe =
790 JSReceiver::GetOwnPropertyAttributes(object, key);
791 if (!maybe.IsJust()) return isolate->heap()->exception();
792 if (maybe.FromJust() == ABSENT) maybe = Just(DONT_ENUM);
793 return isolate->heap()->ToBoolean((maybe.FromJust() & DONT_ENUM) == 0);
797 // Returns either a FixedArray or, if the given object has an enum cache that
798 // contains all enumerable properties of the object and its prototypes have
799 // none, the map of the object. This is used to speed up the check for
800 // deletions during a for-in.
801 RUNTIME_FUNCTION(Runtime_GetPropertyNamesFast) {
802 SealHandleScope shs(isolate);
803 DCHECK(args.length() == 1);
805 CONVERT_ARG_CHECKED(JSReceiver, raw_object, 0);
807 if (raw_object->IsSimpleEnum()) return raw_object->map();
809 HandleScope scope(isolate);
810 Handle<JSReceiver> object(raw_object);
811 Handle<FixedArray> content;
812 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
814 JSReceiver::GetKeys(object, JSReceiver::INCLUDE_PROTOS));
816 // Test again, since cache may have been built by preceding call.
817 if (object->IsSimpleEnum()) return object->map();
823 // Return the names of the own named properties.
825 // args[1]: PropertyAttributes as int
826 RUNTIME_FUNCTION(Runtime_GetOwnPropertyNames) {
827 HandleScope scope(isolate);
828 DCHECK(args.length() == 2);
829 if (!args[0]->IsJSObject()) {
830 return isolate->heap()->undefined_value();
832 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
833 CONVERT_SMI_ARG_CHECKED(filter_value, 1);
834 PropertyAttributes filter = static_cast<PropertyAttributes>(filter_value);
836 // Find the number of own properties for each of the objects.
837 int total_property_count = 0;
838 for (PrototypeIterator iter(isolate, object,
839 PrototypeIterator::START_AT_RECEIVER);
840 !iter.IsAtEnd(PrototypeIterator::END_AT_NON_HIDDEN); iter.Advance()) {
841 Handle<JSObject> jsproto =
842 Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter));
843 total_property_count += jsproto->NumberOfOwnProperties(filter);
846 // Allocate an array with storage for all the property names.
847 Handle<FixedArray> names =
848 isolate->factory()->NewFixedArray(total_property_count);
850 // Get the property names.
851 int next_copy_index = 0;
852 int hidden_strings = 0;
853 Handle<Object> hidden_string = isolate->factory()->hidden_string();
854 for (PrototypeIterator iter(isolate, object,
855 PrototypeIterator::START_AT_RECEIVER);
856 !iter.IsAtEnd(PrototypeIterator::END_AT_NON_HIDDEN); iter.Advance()) {
857 Handle<JSObject> jsproto =
858 Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter));
859 int own = jsproto->GetOwnPropertyNames(*names, next_copy_index, filter);
860 // Names from hidden prototypes may already have been added
861 // for inherited function template instances. Count the duplicates
862 // and stub them out; the final copy pass at the end ignores holes.
863 for (int j = next_copy_index; j < next_copy_index + own; j++) {
864 Object* name_from_hidden_proto = names->get(j);
865 if (isolate->IsInternallyUsedPropertyName(name_from_hidden_proto)) {
868 for (int k = 0; k < next_copy_index; k++) {
869 Object* name = names->get(k);
870 if (name_from_hidden_proto == name) {
871 names->set(j, *hidden_string);
878 next_copy_index += own;
881 CHECK_EQ(total_property_count, next_copy_index);
883 if (object->IsAccessCheckNeeded() && !isolate->MayAccess(object)) {
884 for (int i = 0; i < total_property_count; i++) {
885 Handle<Name> name(Name::cast(names->get(i)));
886 if (name.is_identical_to(hidden_string)) continue;
887 LookupIterator it(object, name, LookupIterator::HIDDEN_SKIP_INTERCEPTOR);
888 if (!JSObject::AllCanRead(&it)) {
889 names->set(i, *hidden_string);
895 // Filter out name of hidden properties object and
896 // hidden prototype duplicates.
897 if (hidden_strings > 0) {
898 if (hidden_strings == total_property_count) {
899 names = isolate->factory()->empty_fixed_array();
902 for (i = 0; i < total_property_count; i++) {
903 Object* name = names->get(i);
904 if (name == *hidden_string) break;
907 for (; i < total_property_count; i++) {
908 Object* name = names->get(i);
909 if (name == *hidden_string) continue;
910 names->set(dest_pos++, name);
913 isolate->heap()->RightTrimFixedArray<Heap::CONCURRENT_TO_SWEEPER>(
914 *names, hidden_strings);
918 return *isolate->factory()->NewJSArrayWithElements(names);
922 // Return the names of the own indexed properties.
924 RUNTIME_FUNCTION(Runtime_GetOwnElementNames) {
925 HandleScope scope(isolate);
926 DCHECK(args.length() == 1);
927 if (!args[0]->IsJSObject()) {
928 return isolate->heap()->undefined_value();
930 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
932 int n = obj->NumberOfOwnElements(NONE);
933 Handle<FixedArray> names = isolate->factory()->NewFixedArray(n);
934 obj->GetOwnElementKeys(*names, NONE);
935 return *isolate->factory()->NewJSArrayWithElements(names);
939 // Return information on whether an object has a named or indexed interceptor.
941 RUNTIME_FUNCTION(Runtime_GetInterceptorInfo) {
942 HandleScope scope(isolate);
943 DCHECK(args.length() == 1);
944 if (!args[0]->IsJSObject()) {
945 return Smi::FromInt(0);
947 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
950 if (obj->HasNamedInterceptor()) result |= 2;
951 if (obj->HasIndexedInterceptor()) result |= 1;
953 return Smi::FromInt(result);
957 // Return property names from named interceptor.
959 RUNTIME_FUNCTION(Runtime_GetNamedInterceptorPropertyNames) {
960 HandleScope scope(isolate);
961 DCHECK(args.length() == 1);
962 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
964 if (obj->HasNamedInterceptor()) {
965 Handle<JSObject> result;
966 if (JSObject::GetKeysForNamedInterceptor(obj, obj).ToHandle(&result)) {
970 return isolate->heap()->undefined_value();
974 // Return element names from indexed interceptor.
976 RUNTIME_FUNCTION(Runtime_GetIndexedInterceptorElementNames) {
977 HandleScope scope(isolate);
978 DCHECK(args.length() == 1);
979 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
981 if (obj->HasIndexedInterceptor()) {
982 Handle<JSObject> result;
983 if (JSObject::GetKeysForIndexedInterceptor(obj, obj).ToHandle(&result)) {
987 return isolate->heap()->undefined_value();
991 RUNTIME_FUNCTION(Runtime_OwnKeys) {
992 HandleScope scope(isolate);
993 DCHECK(args.length() == 1);
994 CONVERT_ARG_CHECKED(JSObject, raw_object, 0);
995 Handle<JSObject> object(raw_object);
997 Handle<FixedArray> contents;
998 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
999 isolate, contents, JSReceiver::GetKeys(object, JSReceiver::OWN_ONLY));
1001 // Some fast paths through GetKeysInFixedArrayFor reuse a cached
1002 // property array and since the result is mutable we have to create
1003 // a fresh clone on each invocation.
1004 int length = contents->length();
1005 Handle<FixedArray> copy = isolate->factory()->NewFixedArray(length);
1006 for (int i = 0; i < length; i++) {
1007 Object* entry = contents->get(i);
1008 if (entry->IsString()) {
1009 copy->set(i, entry);
1011 DCHECK(entry->IsNumber());
1012 HandleScope scope(isolate);
1013 Handle<Object> entry_handle(entry, isolate);
1014 Handle<Object> entry_str =
1015 isolate->factory()->NumberToString(entry_handle);
1016 copy->set(i, *entry_str);
1019 return *isolate->factory()->NewJSArrayWithElements(copy);
1023 RUNTIME_FUNCTION(Runtime_ToFastProperties) {
1024 HandleScope scope(isolate);
1025 DCHECK(args.length() == 1);
1026 CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
1027 if (object->IsJSObject() && !object->IsGlobalObject()) {
1028 JSObject::MigrateSlowToFast(Handle<JSObject>::cast(object), 0,
1029 "RuntimeToFastProperties");
1035 RUNTIME_FUNCTION(Runtime_NewStringWrapper) {
1036 HandleScope scope(isolate);
1037 DCHECK(args.length() == 1);
1038 CONVERT_ARG_HANDLE_CHECKED(String, value, 0);
1039 return *Object::ToObject(isolate, value).ToHandleChecked();
1043 RUNTIME_FUNCTION(Runtime_AllocateHeapNumber) {
1044 HandleScope scope(isolate);
1045 DCHECK(args.length() == 0);
1046 return *isolate->factory()->NewHeapNumber(0);
1050 static Object* Runtime_NewObjectHelper(Isolate* isolate,
1051 Handle<Object> constructor,
1052 Handle<Object> original_constructor,
1053 Handle<AllocationSite> site) {
1054 // If the constructor isn't a proper function we throw a type error.
1055 if (!constructor->IsJSFunction()) {
1056 THROW_NEW_ERROR_RETURN_FAILURE(
1057 isolate, NewTypeError(MessageTemplate::kNotConstructor, constructor));
1060 Handle<JSFunction> function = Handle<JSFunction>::cast(constructor);
1062 CHECK(original_constructor->IsJSFunction());
1063 Handle<JSFunction> original_function =
1064 Handle<JSFunction>::cast(original_constructor);
1067 // If function should not have prototype, construction is not allowed. In this
1068 // case generated code bailouts here, since function has no initial_map.
1069 if (!function->should_have_prototype() && !function->shared()->bound()) {
1070 THROW_NEW_ERROR_RETURN_FAILURE(
1071 isolate, NewTypeError(MessageTemplate::kNotConstructor, constructor));
1074 Debug* debug = isolate->debug();
1075 // Handle stepping into constructors if step into is active.
1076 if (debug->StepInActive()) debug->HandleStepIn(function, true);
1078 if (function->has_initial_map()) {
1079 if (function->initial_map()->instance_type() == JS_FUNCTION_TYPE) {
1080 // The 'Function' function ignores the receiver object when
1081 // called using 'new' and creates a new JSFunction object that
1082 // is returned. The receiver object is only used for error
1083 // reporting if an error occurs when constructing the new
1084 // JSFunction. Factory::NewJSObject() should not be used to
1085 // allocate JSFunctions since it does not properly initialize
1086 // the shared part of the function. Since the receiver is
1087 // ignored anyway, we use the global object as the receiver
1088 // instead of a new JSFunction object. This way, errors are
1089 // reported the same way whether or not 'Function' is called
1091 return isolate->global_proxy();
1095 // The function should be compiled for the optimization hints to be
1097 Compiler::EnsureCompiled(function, CLEAR_EXCEPTION);
1099 Handle<JSObject> result;
1100 if (site.is_null()) {
1101 result = isolate->factory()->NewJSObject(function);
1103 result = isolate->factory()->NewJSObjectWithMemento(function, site);
1106 // Set up the prototoype using original function.
1107 // TODO(dslomov): instead of setting the __proto__,
1108 // use and cache the correct map.
1109 if (*original_function != *function) {
1110 if (original_function->has_instance_prototype()) {
1111 Handle<Object> prototype =
1112 handle(original_function->instance_prototype(), isolate);
1113 RETURN_FAILURE_ON_EXCEPTION(
1114 isolate, JSObject::SetPrototype(result, prototype, false));
1118 isolate->counters()->constructed_objects()->Increment();
1119 isolate->counters()->constructed_objects_runtime()->Increment();
1125 RUNTIME_FUNCTION(Runtime_NewObject) {
1126 HandleScope scope(isolate);
1127 DCHECK(args.length() == 2);
1128 CONVERT_ARG_HANDLE_CHECKED(Object, constructor, 0);
1129 CONVERT_ARG_HANDLE_CHECKED(Object, original_constructor, 1);
1130 return Runtime_NewObjectHelper(isolate, constructor, original_constructor,
1131 Handle<AllocationSite>::null());
1135 RUNTIME_FUNCTION(Runtime_NewObjectWithAllocationSite) {
1136 HandleScope scope(isolate);
1137 DCHECK(args.length() == 3);
1138 CONVERT_ARG_HANDLE_CHECKED(Object, original_constructor, 2);
1139 CONVERT_ARG_HANDLE_CHECKED(Object, constructor, 1);
1140 CONVERT_ARG_HANDLE_CHECKED(Object, feedback, 0);
1141 Handle<AllocationSite> site;
1142 if (feedback->IsAllocationSite()) {
1143 // The feedback can be an AllocationSite or undefined.
1144 site = Handle<AllocationSite>::cast(feedback);
1146 return Runtime_NewObjectHelper(isolate, constructor, original_constructor,
1151 RUNTIME_FUNCTION(Runtime_FinalizeInstanceSize) {
1152 HandleScope scope(isolate);
1153 DCHECK(args.length() == 1);
1155 CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
1156 function->CompleteInobjectSlackTracking();
1158 return isolate->heap()->undefined_value();
1162 RUNTIME_FUNCTION(Runtime_GlobalProxy) {
1163 SealHandleScope shs(isolate);
1164 DCHECK(args.length() == 1);
1165 CONVERT_ARG_CHECKED(JSFunction, function, 0);
1166 return function->context()->global_proxy();
1170 RUNTIME_FUNCTION(Runtime_LookupAccessor) {
1171 HandleScope scope(isolate);
1172 DCHECK(args.length() == 3);
1173 CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
1174 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
1175 CONVERT_SMI_ARG_CHECKED(flag, 2);
1176 AccessorComponent component = flag == 0 ? ACCESSOR_GETTER : ACCESSOR_SETTER;
1177 if (!receiver->IsJSObject()) return isolate->heap()->undefined_value();
1178 Handle<Object> result;
1179 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
1181 JSObject::GetAccessor(Handle<JSObject>::cast(receiver), name, component));
1186 RUNTIME_FUNCTION(Runtime_LoadMutableDouble) {
1187 HandleScope scope(isolate);
1188 DCHECK(args.length() == 2);
1189 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
1190 CONVERT_ARG_HANDLE_CHECKED(Smi, index, 1);
1191 RUNTIME_ASSERT((index->value() & 1) == 1);
1192 FieldIndex field_index =
1193 FieldIndex::ForLoadByFieldIndex(object->map(), index->value());
1194 if (field_index.is_inobject()) {
1195 RUNTIME_ASSERT(field_index.property_index() <
1196 object->map()->inobject_properties());
1198 RUNTIME_ASSERT(field_index.outobject_array_index() <
1199 object->properties()->length());
1201 return *JSObject::FastPropertyAt(object, Representation::Double(),
1206 RUNTIME_FUNCTION(Runtime_TryMigrateInstance) {
1207 HandleScope scope(isolate);
1208 DCHECK(args.length() == 1);
1209 CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
1210 if (!object->IsJSObject()) return Smi::FromInt(0);
1211 Handle<JSObject> js_object = Handle<JSObject>::cast(object);
1212 if (!js_object->map()->is_deprecated()) return Smi::FromInt(0);
1213 // This call must not cause lazy deopts, because it's called from deferred
1214 // code where we can't handle lazy deopts for lack of a suitable bailout
1215 // ID. So we just try migration and signal failure if necessary,
1216 // which will also trigger a deopt.
1217 if (!JSObject::TryMigrateInstance(js_object)) return Smi::FromInt(0);
1222 RUNTIME_FUNCTION(Runtime_IsJSGlobalProxy) {
1223 SealHandleScope shs(isolate);
1224 DCHECK(args.length() == 1);
1225 CONVERT_ARG_CHECKED(Object, obj, 0);
1226 return isolate->heap()->ToBoolean(obj->IsJSGlobalProxy());
1230 static bool IsValidAccessor(Handle<Object> obj) {
1231 return obj->IsUndefined() || obj->IsSpecFunction() || obj->IsNull();
1235 // Implements part of 8.12.9 DefineOwnProperty.
1236 // There are 3 cases that lead here:
1237 // Step 4b - define a new accessor property.
1238 // Steps 9c & 12 - replace an existing data property with an accessor property.
1239 // Step 12 - update an existing accessor property with an accessor or generic
1241 RUNTIME_FUNCTION(Runtime_DefineAccessorPropertyUnchecked) {
1242 HandleScope scope(isolate);
1243 DCHECK(args.length() == 5);
1244 CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
1245 RUNTIME_ASSERT(!obj->IsNull());
1246 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
1247 CONVERT_ARG_HANDLE_CHECKED(Object, getter, 2);
1248 RUNTIME_ASSERT(IsValidAccessor(getter));
1249 CONVERT_ARG_HANDLE_CHECKED(Object, setter, 3);
1250 RUNTIME_ASSERT(IsValidAccessor(setter));
1251 CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 4);
1253 RETURN_FAILURE_ON_EXCEPTION(
1254 isolate, JSObject::DefineAccessor(obj, name, getter, setter, attrs));
1255 return isolate->heap()->undefined_value();
1259 // Implements part of 8.12.9 DefineOwnProperty.
1260 // There are 3 cases that lead here:
1261 // Step 4a - define a new data property.
1262 // Steps 9b & 12 - replace an existing accessor property with a data property.
1263 // Step 12 - update an existing data property with a data or generic
1265 RUNTIME_FUNCTION(Runtime_DefineDataPropertyUnchecked) {
1266 HandleScope scope(isolate);
1267 DCHECK(args.length() == 4);
1268 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
1269 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
1270 CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
1271 CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
1273 LookupIterator it = LookupIterator::PropertyOrElement(isolate, object, name,
1274 LookupIterator::OWN);
1275 if (it.state() == LookupIterator::ACCESS_CHECK && !it.HasAccess()) {
1276 return isolate->heap()->undefined_value();
1279 Handle<Object> result;
1280 ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
1281 isolate, result, JSObject::DefineOwnPropertyIgnoreAttributes(
1282 &it, value, attrs, JSObject::DONT_FORCE_FIELD));
1288 // Return property without being observable by accessors or interceptors.
1289 RUNTIME_FUNCTION(Runtime_GetDataProperty) {
1290 HandleScope scope(isolate);
1291 DCHECK(args.length() == 2);
1292 CONVERT_ARG_HANDLE_CHECKED(JSReceiver, object, 0);
1293 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
1294 return *JSReceiver::GetDataProperty(object, name);
1298 RUNTIME_FUNCTION(Runtime_HasFastPackedElements) {
1299 SealHandleScope shs(isolate);
1300 DCHECK(args.length() == 1);
1301 CONVERT_ARG_CHECKED(HeapObject, obj, 0);
1302 return isolate->heap()->ToBoolean(
1303 IsFastPackedElementsKind(obj->map()->elements_kind()));
1307 RUNTIME_FUNCTION(Runtime_ValueOf) {
1308 SealHandleScope shs(isolate);
1309 DCHECK(args.length() == 1);
1310 CONVERT_ARG_CHECKED(Object, obj, 0);
1311 if (!obj->IsJSValue()) return obj;
1312 return JSValue::cast(obj)->value();
1316 RUNTIME_FUNCTION(Runtime_SetValueOf) {
1317 SealHandleScope shs(isolate);
1318 DCHECK(args.length() == 2);
1319 CONVERT_ARG_CHECKED(Object, obj, 0);
1320 CONVERT_ARG_CHECKED(Object, value, 1);
1321 if (!obj->IsJSValue()) return value;
1322 JSValue::cast(obj)->set_value(value);
1327 RUNTIME_FUNCTION(Runtime_JSValueGetValue) {
1328 SealHandleScope shs(isolate);
1329 DCHECK(args.length() == 1);
1330 CONVERT_ARG_CHECKED(JSValue, obj, 0);
1331 return JSValue::cast(obj)->value();
1335 RUNTIME_FUNCTION(Runtime_HeapObjectGetMap) {
1336 SealHandleScope shs(isolate);
1337 DCHECK(args.length() == 1);
1338 CONVERT_ARG_CHECKED(HeapObject, obj, 0);
1343 RUNTIME_FUNCTION(Runtime_MapGetInstanceType) {
1344 SealHandleScope shs(isolate);
1345 DCHECK(args.length() == 1);
1346 CONVERT_ARG_CHECKED(Map, map, 0);
1347 return Smi::FromInt(map->instance_type());
1351 RUNTIME_FUNCTION(Runtime_ObjectEquals) {
1352 SealHandleScope shs(isolate);
1353 DCHECK(args.length() == 2);
1354 CONVERT_ARG_CHECKED(Object, obj1, 0);
1355 CONVERT_ARG_CHECKED(Object, obj2, 1);
1356 return isolate->heap()->ToBoolean(obj1 == obj2);
1360 RUNTIME_FUNCTION(Runtime_IsObject) {
1361 SealHandleScope shs(isolate);
1362 DCHECK(args.length() == 1);
1363 CONVERT_ARG_CHECKED(Object, obj, 0);
1364 if (!obj->IsHeapObject()) return isolate->heap()->false_value();
1365 if (obj->IsNull()) return isolate->heap()->true_value();
1366 if (obj->IsUndetectableObject()) return isolate->heap()->false_value();
1367 Map* map = HeapObject::cast(obj)->map();
1368 bool is_non_callable_spec_object =
1369 map->instance_type() >= FIRST_NONCALLABLE_SPEC_OBJECT_TYPE &&
1370 map->instance_type() <= LAST_NONCALLABLE_SPEC_OBJECT_TYPE;
1371 return isolate->heap()->ToBoolean(is_non_callable_spec_object);
1375 RUNTIME_FUNCTION(Runtime_IsUndetectableObject) {
1376 SealHandleScope shs(isolate);
1377 DCHECK(args.length() == 1);
1378 CONVERT_ARG_CHECKED(Object, obj, 0);
1379 return isolate->heap()->ToBoolean(obj->IsUndetectableObject());
1383 RUNTIME_FUNCTION(Runtime_IsSpecObject) {
1384 SealHandleScope shs(isolate);
1385 DCHECK(args.length() == 1);
1386 CONVERT_ARG_CHECKED(Object, obj, 0);
1387 return isolate->heap()->ToBoolean(obj->IsSpecObject());
1391 RUNTIME_FUNCTION(Runtime_IsStrong) {
1392 SealHandleScope shs(isolate);
1393 DCHECK(args.length() == 1);
1394 CONVERT_ARG_CHECKED(Object, obj, 0);
1395 return isolate->heap()->ToBoolean(obj->IsJSReceiver() &&
1396 JSReceiver::cast(obj)->map()->is_strong());
1400 RUNTIME_FUNCTION(Runtime_ClassOf) {
1401 SealHandleScope shs(isolate);
1402 DCHECK(args.length() == 1);
1403 CONVERT_ARG_CHECKED(Object, obj, 0);
1404 if (!obj->IsJSReceiver()) return isolate->heap()->null_value();
1405 return JSReceiver::cast(obj)->class_name();
1409 RUNTIME_FUNCTION(Runtime_DefineGetterPropertyUnchecked) {
1410 HandleScope scope(isolate);
1411 DCHECK(args.length() == 4);
1412 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
1413 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
1414 CONVERT_ARG_HANDLE_CHECKED(JSFunction, getter, 2);
1415 CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
1417 RETURN_FAILURE_ON_EXCEPTION(
1419 JSObject::DefineAccessor(object, name, getter,
1420 isolate->factory()->null_value(), attrs));
1421 return isolate->heap()->undefined_value();
1425 RUNTIME_FUNCTION(Runtime_DefineSetterPropertyUnchecked) {
1426 HandleScope scope(isolate);
1427 DCHECK(args.length() == 4);
1428 CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
1429 CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
1430 CONVERT_ARG_HANDLE_CHECKED(JSFunction, setter, 2);
1431 CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
1433 RETURN_FAILURE_ON_EXCEPTION(
1435 JSObject::DefineAccessor(object, name, isolate->factory()->null_value(),
1437 return isolate->heap()->undefined_value();
1441 RUNTIME_FUNCTION(Runtime_ToObject) {
1442 HandleScope scope(isolate);
1443 DCHECK_EQ(1, args.length());
1444 CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
1445 Handle<JSReceiver> receiver;
1446 if (JSReceiver::ToObject(isolate, object).ToHandle(&receiver)) {
1449 THROW_NEW_ERROR_RETURN_FAILURE(
1450 isolate, NewTypeError(MessageTemplate::kUndefinedOrNullToObject));
1453 } // namespace internal