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1 // Copyright 2006-2009 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2009 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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631 // if args[1] is a data property on args[0] | 631 // if args[1] is a data property on args[0] |
632 // [false, value, Writeable, Enumerable, Configurable] | 632 // [false, value, Writeable, Enumerable, Configurable] |
633 // if args[1] is an accessor on args[0] | 633 // if args[1] is an accessor on args[0] |
634 // [true, GetFunction, SetFunction, Enumerable, Configurable] | 634 // [true, GetFunction, SetFunction, Enumerable, Configurable] |
635 static Object* Runtime_GetOwnProperty(Arguments args) { | 635 static Object* Runtime_GetOwnProperty(Arguments args) { |
636 ASSERT(args.length() == 2); | 636 ASSERT(args.length() == 2); |
637 HandleScope scope; | 637 HandleScope scope; |
638 Handle<FixedArray> elms = Factory::NewFixedArray(DESCRIPTOR_SIZE); | 638 Handle<FixedArray> elms = Factory::NewFixedArray(DESCRIPTOR_SIZE); |
639 Handle<JSArray> desc = Factory::NewJSArrayWithElements(elms); | 639 Handle<JSArray> desc = Factory::NewJSArrayWithElements(elms); |
640 LookupResult result; | 640 LookupResult result; |
641 CONVERT_CHECKED(JSObject, obj, args[0]); | 641 CONVERT_ARG_CHECKED(JSObject, obj, 0); |
642 CONVERT_CHECKED(String, name, args[1]); | 642 CONVERT_ARG_CHECKED(String, name, 1); |
643 | 643 |
644 // This could be an element. | 644 // This could be an element. |
645 uint32_t index; | 645 uint32_t index; |
646 if (name->AsArrayIndex(&index)) { | 646 if (name->AsArrayIndex(&index)) { |
647 switch (obj->HasLocalElement(index)) { | 647 switch (obj->HasLocalElement(index)) { |
648 case JSObject::UNDEFINED_ELEMENT: | 648 case JSObject::UNDEFINED_ELEMENT: |
649 return Heap::undefined_value(); | 649 return Heap::undefined_value(); |
650 | 650 |
651 case JSObject::STRING_CHARACTER_ELEMENT: { | 651 case JSObject::STRING_CHARACTER_ELEMENT: { |
652 // Special handling of string objects according to ECMAScript 5 | 652 // Special handling of string objects according to ECMAScript 5 |
653 // 15.5.5.2. Note that this might be a string object with elements | 653 // 15.5.5.2. Note that this might be a string object with elements |
654 // other than the actual string value. This is covered by the | 654 // other than the actual string value. This is covered by the |
655 // subsequent cases. | 655 // subsequent cases. |
656 JSValue* js_value = JSValue::cast(obj); | 656 Handle<JSValue> js_value = Handle<JSValue>::cast(obj); |
657 String* str = String::cast(js_value->value()); | 657 Handle<String> str(String::cast(js_value->value())); |
| 658 Handle<String> substr = SubString(str, index, index+1, NOT_TENURED); |
| 659 |
658 elms->set(IS_ACCESSOR_INDEX, Heap::false_value()); | 660 elms->set(IS_ACCESSOR_INDEX, Heap::false_value()); |
659 elms->set(VALUE_INDEX, str->SubString(index, index+1)); | 661 elms->set(VALUE_INDEX, *substr); |
660 elms->set(WRITABLE_INDEX, Heap::false_value()); | 662 elms->set(WRITABLE_INDEX, Heap::false_value()); |
661 elms->set(ENUMERABLE_INDEX, Heap::false_value()); | 663 elms->set(ENUMERABLE_INDEX, Heap::false_value()); |
662 elms->set(CONFIGURABLE_INDEX, Heap::false_value()); | 664 elms->set(CONFIGURABLE_INDEX, Heap::false_value()); |
663 return *desc; | 665 return *desc; |
664 } | 666 } |
665 | 667 |
666 case JSObject::INTERCEPTED_ELEMENT: | 668 case JSObject::INTERCEPTED_ELEMENT: |
667 case JSObject::FAST_ELEMENT: | 669 case JSObject::FAST_ELEMENT: { |
668 elms->set(IS_ACCESSOR_INDEX, Heap::false_value()); | 670 elms->set(IS_ACCESSOR_INDEX, Heap::false_value()); |
669 elms->set(VALUE_INDEX, obj->GetElement(index)); | 671 Handle<Object> element = GetElement(Handle<Object>(obj), index); |
| 672 elms->set(VALUE_INDEX, *element); |
670 elms->set(WRITABLE_INDEX, Heap::true_value()); | 673 elms->set(WRITABLE_INDEX, Heap::true_value()); |
671 elms->set(ENUMERABLE_INDEX, Heap::true_value()); | 674 elms->set(ENUMERABLE_INDEX, Heap::true_value()); |
672 elms->set(CONFIGURABLE_INDEX, Heap::true_value()); | 675 elms->set(CONFIGURABLE_INDEX, Heap::true_value()); |
673 return *desc; | 676 return *desc; |
| 677 } |
674 | 678 |
675 case JSObject::DICTIONARY_ELEMENT: { | 679 case JSObject::DICTIONARY_ELEMENT: { |
676 NumberDictionary* dictionary = obj->element_dictionary(); | 680 NumberDictionary* dictionary = obj->element_dictionary(); |
677 int entry = dictionary->FindEntry(index); | 681 int entry = dictionary->FindEntry(index); |
678 ASSERT(entry != NumberDictionary::kNotFound); | 682 ASSERT(entry != NumberDictionary::kNotFound); |
679 PropertyDetails details = dictionary->DetailsAt(entry); | 683 PropertyDetails details = dictionary->DetailsAt(entry); |
680 switch (details.type()) { | 684 switch (details.type()) { |
681 case CALLBACKS: { | 685 case CALLBACKS: { |
682 // This is an accessor property with getter and/or setter. | 686 // This is an accessor property with getter and/or setter. |
683 FixedArray* callbacks = | 687 FixedArray* callbacks = |
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698 break; | 702 break; |
699 } | 703 } |
700 elms->set(ENUMERABLE_INDEX, Heap::ToBoolean(!details.IsDontEnum())); | 704 elms->set(ENUMERABLE_INDEX, Heap::ToBoolean(!details.IsDontEnum())); |
701 elms->set(CONFIGURABLE_INDEX, Heap::ToBoolean(!details.IsDontDelete())); | 705 elms->set(CONFIGURABLE_INDEX, Heap::ToBoolean(!details.IsDontDelete())); |
702 return *desc; | 706 return *desc; |
703 } | 707 } |
704 } | 708 } |
705 } | 709 } |
706 | 710 |
707 // Use recursive implementation to also traverse hidden prototypes | 711 // Use recursive implementation to also traverse hidden prototypes |
708 GetOwnPropertyImplementation(obj, name, &result); | 712 GetOwnPropertyImplementation(*obj, *name, &result); |
709 | 713 |
710 if (!result.IsProperty()) { | 714 if (!result.IsProperty()) { |
711 return Heap::undefined_value(); | 715 return Heap::undefined_value(); |
712 } | 716 } |
713 if (result.type() == CALLBACKS) { | 717 if (result.type() == CALLBACKS) { |
714 Object* structure = result.GetCallbackObject(); | 718 Object* structure = result.GetCallbackObject(); |
715 if (structure->IsProxy() || structure->IsAccessorInfo()) { | 719 if (structure->IsProxy() || structure->IsAccessorInfo()) { |
716 // Property that is internally implemented as a callback or | 720 // Property that is internally implemented as a callback or |
717 // an API defined callback. | 721 // an API defined callback. |
718 Object* value = obj->GetPropertyWithCallback( | 722 Object* value = obj->GetPropertyWithCallback( |
719 obj, structure, name, result.holder()); | 723 *obj, structure, *name, result.holder()); |
| 724 if (value->IsFailure()) return value; |
720 elms->set(IS_ACCESSOR_INDEX, Heap::false_value()); | 725 elms->set(IS_ACCESSOR_INDEX, Heap::false_value()); |
721 elms->set(VALUE_INDEX, value); | 726 elms->set(VALUE_INDEX, value); |
722 elms->set(WRITABLE_INDEX, Heap::ToBoolean(!result.IsReadOnly())); | 727 elms->set(WRITABLE_INDEX, Heap::ToBoolean(!result.IsReadOnly())); |
723 } else if (structure->IsFixedArray()) { | 728 } else if (structure->IsFixedArray()) { |
724 // __defineGetter__/__defineSetter__ callback. | 729 // __defineGetter__/__defineSetter__ callback. |
725 elms->set(IS_ACCESSOR_INDEX, Heap::true_value()); | 730 elms->set(IS_ACCESSOR_INDEX, Heap::true_value()); |
726 elms->set(GETTER_INDEX, FixedArray::cast(structure)->get(0)); | 731 elms->set(GETTER_INDEX, FixedArray::cast(structure)->get(0)); |
727 elms->set(SETTER_INDEX, FixedArray::cast(structure)->get(1)); | 732 elms->set(SETTER_INDEX, FixedArray::cast(structure)->get(1)); |
728 } else { | 733 } else { |
729 return Heap::undefined_value(); | 734 return Heap::undefined_value(); |
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7530 // If estimated number of elements is more than half of length, a | 7535 // If estimated number of elements is more than half of length, a |
7531 // fixed array (fast case) is more time and space-efficient than a | 7536 // fixed array (fast case) is more time and space-efficient than a |
7532 // dictionary. | 7537 // dictionary. |
7533 bool fast_case = (estimate_nof_elements * 2) >= result_length; | 7538 bool fast_case = (estimate_nof_elements * 2) >= result_length; |
7534 | 7539 |
7535 Handle<FixedArray> storage; | 7540 Handle<FixedArray> storage; |
7536 if (fast_case) { | 7541 if (fast_case) { |
7537 // The backing storage array must have non-existing elements to | 7542 // The backing storage array must have non-existing elements to |
7538 // preserve holes across concat operations. | 7543 // preserve holes across concat operations. |
7539 storage = Factory::NewFixedArrayWithHoles(result_length); | 7544 storage = Factory::NewFixedArrayWithHoles(result_length); |
7540 result->set_map(*Factory::GetFastElementsMap(Handle<Map>(result->map()))); | 7545 Handle<Map> fast_map = |
| 7546 Factory::GetFastElementsMap(Handle<Map>(result->map())); |
| 7547 result->set_map(*fast_map); |
7541 } else { | 7548 } else { |
7542 // TODO(126): move 25% pre-allocation logic into Dictionary::Allocate | 7549 // TODO(126): move 25% pre-allocation logic into Dictionary::Allocate |
7543 uint32_t at_least_space_for = estimate_nof_elements + | 7550 uint32_t at_least_space_for = estimate_nof_elements + |
7544 (estimate_nof_elements >> 2); | 7551 (estimate_nof_elements >> 2); |
7545 storage = Handle<FixedArray>::cast( | 7552 storage = Handle<FixedArray>::cast( |
7546 Factory::NewNumberDictionary(at_least_space_for)); | 7553 Factory::NewNumberDictionary(at_least_space_for)); |
7547 result->set_map(*Factory::GetSlowElementsMap(Handle<Map>(result->map()))); | 7554 Handle<Map> slow_map = |
| 7555 Factory::GetSlowElementsMap(Handle<Map>(result->map())); |
| 7556 result->set_map(*slow_map); |
7548 } | 7557 } |
7549 | 7558 |
7550 Handle<Object> len = Factory::NewNumber(static_cast<double>(result_length)); | 7559 Handle<Object> len = Factory::NewNumber(static_cast<double>(result_length)); |
7551 | 7560 |
7552 ArrayConcatVisitor visitor(storage, result_length, fast_case); | 7561 ArrayConcatVisitor visitor(storage, result_length, fast_case); |
7553 | 7562 |
7554 IterateArguments(arguments, &visitor); | 7563 IterateArguments(arguments, &visitor); |
7555 | 7564 |
7556 result->set_length(*len); | 7565 result->set_length(*len); |
7557 // Please note the storage might have changed in the visitor. | 7566 // Please note the storage might have changed in the visitor. |
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9072 static Handle<Context> CopyWithContextChain(Handle<Context> context_chain, | 9081 static Handle<Context> CopyWithContextChain(Handle<Context> context_chain, |
9073 Handle<Context> function_context) { | 9082 Handle<Context> function_context) { |
9074 // At the bottom of the chain. Return the function context to link to. | 9083 // At the bottom of the chain. Return the function context to link to. |
9075 if (context_chain->is_function_context()) { | 9084 if (context_chain->is_function_context()) { |
9076 return function_context; | 9085 return function_context; |
9077 } | 9086 } |
9078 | 9087 |
9079 // Recursively copy the with contexts. | 9088 // Recursively copy the with contexts. |
9080 Handle<Context> previous(context_chain->previous()); | 9089 Handle<Context> previous(context_chain->previous()); |
9081 Handle<JSObject> extension(JSObject::cast(context_chain->extension())); | 9090 Handle<JSObject> extension(JSObject::cast(context_chain->extension())); |
9082 return Factory::NewWithContext( | 9091 Handle<Context> context = CopyWithContextChain(function_context, previous); |
9083 CopyWithContextChain(function_context, previous), | 9092 return Factory::NewWithContext(context, |
9084 extension, | 9093 extension, |
9085 context_chain->IsCatchContext()); | 9094 context_chain->IsCatchContext()); |
9086 } | 9095 } |
9087 | 9096 |
9088 | 9097 |
9089 // Helper function to find or create the arguments object for | 9098 // Helper function to find or create the arguments object for |
9090 // Runtime_DebugEvaluate. | 9099 // Runtime_DebugEvaluate. |
9091 static Handle<Object> GetArgumentsObject(JavaScriptFrame* frame, | 9100 static Handle<Object> GetArgumentsObject(JavaScriptFrame* frame, |
9092 Handle<JSFunction> function, | 9101 Handle<JSFunction> function, |
9093 Handle<SerializedScopeInfo> scope_info, | 9102 Handle<SerializedScopeInfo> scope_info, |
9094 const ScopeInfo<>* sinfo, | 9103 const ScopeInfo<>* sinfo, |
9095 Handle<Context> function_context) { | 9104 Handle<Context> function_context) { |
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10204 } else { | 10213 } else { |
10205 // Handle last resort GC and make sure to allow future allocations | 10214 // Handle last resort GC and make sure to allow future allocations |
10206 // to grow the heap without causing GCs (if possible). | 10215 // to grow the heap without causing GCs (if possible). |
10207 Counters::gc_last_resort_from_js.Increment(); | 10216 Counters::gc_last_resort_from_js.Increment(); |
10208 Heap::CollectAllGarbage(false); | 10217 Heap::CollectAllGarbage(false); |
10209 } | 10218 } |
10210 } | 10219 } |
10211 | 10220 |
10212 | 10221 |
10213 } } // namespace v8::internal | 10222 } } // namespace v8::internal |
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