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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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4141 // Check if this is an element. | 4141 // Check if this is an element. |
4142 uint32_t index; | 4142 uint32_t index; |
4143 bool is_element = name->AsArrayIndex(&index); | 4143 bool is_element = name->AsArrayIndex(&index); |
4144 | 4144 |
4145 // Special case for elements if any of the flags are true. | 4145 // Special case for elements if any of the flags are true. |
4146 // If elements are in fast case we always implicitly assume that: | 4146 // If elements are in fast case we always implicitly assume that: |
4147 // DONT_DELETE: false, DONT_ENUM: false, READ_ONLY: false. | 4147 // DONT_DELETE: false, DONT_ENUM: false, READ_ONLY: false. |
4148 if (((unchecked & (DONT_DELETE | DONT_ENUM | READ_ONLY)) != 0) && | 4148 if (((unchecked & (DONT_DELETE | DONT_ENUM | READ_ONLY)) != 0) && |
4149 is_element) { | 4149 is_element) { |
4150 // Normalize the elements to enable attributes on the property. | 4150 // Normalize the elements to enable attributes on the property. |
4151 js_object->NormalizeElements(); | 4151 NormalizeElements(js_object); |
4152 NumberDictionary* dictionary = js_object->element_dictionary(); | 4152 Handle<NumberDictionary> dictionary(js_object->element_dictionary()); |
4153 // Make sure that we never go back to fast case. | 4153 // Make sure that we never go back to fast case. |
4154 dictionary->set_requires_slow_elements(); | 4154 dictionary->set_requires_slow_elements(); |
4155 PropertyDetails details = PropertyDetails(attr, NORMAL); | 4155 PropertyDetails details = PropertyDetails(attr, NORMAL); |
4156 dictionary->Set(index, *obj_value, details); | 4156 NumberDictionarySet(dictionary, index, obj_value, details); |
4157 } | 4157 } |
4158 | 4158 |
4159 LookupResult result; | 4159 LookupResult result; |
4160 js_object->LocalLookupRealNamedProperty(*name, &result); | 4160 js_object->LocalLookupRealNamedProperty(*name, &result); |
4161 | 4161 |
4162 // Take special care when attributes are different and there is already | 4162 // Take special care when attributes are different and there is already |
4163 // a property. For simplicity we normalize the property which enables us | 4163 // a property. For simplicity we normalize the property which enables us |
4164 // to not worry about changing the instance_descriptor and creating a new | 4164 // to not worry about changing the instance_descriptor and creating a new |
4165 // map. The current version of SetObjectProperty does not handle attributes | 4165 // map. The current version of SetObjectProperty does not handle attributes |
4166 // correctly in the case where a property is a field and is reset with | 4166 // correctly in the case where a property is a field and is reset with |
4167 // new attributes. | 4167 // new attributes. |
4168 if (result.IsProperty() && attr != result.GetAttributes()) { | 4168 if (result.IsProperty() && attr != result.GetAttributes()) { |
4169 // New attributes - normalize to avoid writing to instance descriptor | 4169 // New attributes - normalize to avoid writing to instance descriptor |
4170 js_object->NormalizeProperties(CLEAR_INOBJECT_PROPERTIES, 0); | 4170 NormalizeProperties(js_object, CLEAR_INOBJECT_PROPERTIES, 0); |
4171 // Use IgnoreAttributes version since a readonly property may be | 4171 // Use IgnoreAttributes version since a readonly property may be |
4172 // overridden and SetProperty does not allow this. | 4172 // overridden and SetProperty does not allow this. |
4173 return js_object->IgnoreAttributesAndSetLocalProperty(*name, | 4173 return js_object->IgnoreAttributesAndSetLocalProperty(*name, |
4174 *obj_value, | 4174 *obj_value, |
4175 attr); | 4175 attr); |
4176 } | 4176 } |
4177 | 4177 |
4178 return Runtime::SetObjectProperty(js_object, name, obj_value, attr); | 4178 return Runtime::SetObjectProperty(js_object, name, obj_value, attr); |
4179 } | 4179 } |
4180 | 4180 |
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4757 } | 4757 } |
4758 | 4758 |
4759 | 4759 |
4760 static Object* Runtime_ToSlowProperties(Arguments args) { | 4760 static Object* Runtime_ToSlowProperties(Arguments args) { |
4761 HandleScope scope; | 4761 HandleScope scope; |
4762 | 4762 |
4763 ASSERT(args.length() == 1); | 4763 ASSERT(args.length() == 1); |
4764 Handle<Object> object = args.at<Object>(0); | 4764 Handle<Object> object = args.at<Object>(0); |
4765 if (object->IsJSObject()) { | 4765 if (object->IsJSObject()) { |
4766 Handle<JSObject> js_object = Handle<JSObject>::cast(object); | 4766 Handle<JSObject> js_object = Handle<JSObject>::cast(object); |
4767 js_object->NormalizeProperties(CLEAR_INOBJECT_PROPERTIES, 0); | 4767 NormalizeProperties(js_object, CLEAR_INOBJECT_PROPERTIES, 0); |
4768 } | 4768 } |
4769 return *object; | 4769 return *object; |
4770 } | 4770 } |
4771 | 4771 |
4772 | 4772 |
4773 static Object* Runtime_ToBool(Arguments args) { | 4773 static Object* Runtime_ToBool(Arguments args) { |
4774 NoHandleAllocation ha; | 4774 NoHandleAllocation ha; |
4775 ASSERT(args.length() == 1); | 4775 ASSERT(args.length() == 1); |
4776 | 4776 |
4777 return args[0]->ToBoolean(); | 4777 return args[0]->ToBoolean(); |
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10741 } else { | 10741 } else { |
10742 // Handle last resort GC and make sure to allow future allocations | 10742 // Handle last resort GC and make sure to allow future allocations |
10743 // to grow the heap without causing GCs (if possible). | 10743 // to grow the heap without causing GCs (if possible). |
10744 Counters::gc_last_resort_from_js.Increment(); | 10744 Counters::gc_last_resort_from_js.Increment(); |
10745 Heap::CollectAllGarbage(false); | 10745 Heap::CollectAllGarbage(false); |
10746 } | 10746 } |
10747 } | 10747 } |
10748 | 10748 |
10749 | 10749 |
10750 } } // namespace v8::internal | 10750 } } // namespace v8::internal |
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