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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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9371 | 9371 |
9372 void JSArray::Expand(int required_size) { | 9372 void JSArray::Expand(int required_size) { |
9373 GetIsolate()->factory()->SetElementsCapacityAndLength( | 9373 GetIsolate()->factory()->SetElementsCapacityAndLength( |
9374 Handle<JSArray>(this), required_size, required_size); | 9374 Handle<JSArray>(this), required_size, required_size); |
9375 } | 9375 } |
9376 | 9376 |
9377 | 9377 |
9378 MaybeObject* JSArray::SetElementsLength(Object* len) { | 9378 MaybeObject* JSArray::SetElementsLength(Object* len) { |
9379 // We should never end in here with a pixel or external array. | 9379 // We should never end in here with a pixel or external array. |
9380 ASSERT(AllowsSetElementsLength()); | 9380 ASSERT(AllowsSetElementsLength()); |
9381 return GetElementsAccessor()->SetLength(this, len); | 9381 if (!(FLAG_harmony_observation && map()->is_observed())) |
| 9382 return GetElementsAccessor()->SetLength(this, len); |
| 9383 |
| 9384 Isolate* isolate = GetIsolate(); |
| 9385 HandleScope scope(isolate); |
| 9386 Handle<JSArray> self(this); |
| 9387 List<Handle<String> > indices; |
| 9388 List<Handle<Object> > old_values; |
| 9389 Handle<Object> old_length_handle(self->length()); |
| 9390 Handle<Object> new_length_handle(len); |
| 9391 uint32_t old_length = 0; |
| 9392 CHECK(old_length_handle->ToArrayIndex(&old_length)); |
| 9393 uint32_t new_length = 0; |
| 9394 if (!new_length_handle->ToArrayIndex(&new_length)) |
| 9395 return Failure::InternalError(); |
| 9396 |
| 9397 // TODO(adamk): This loop can be very slow for arrays in dictionary mode. |
| 9398 // Find another way to iterate over arrays with dictionary elements. |
| 9399 for (uint32_t i = old_length - 1; i + 1 > new_length; --i) { |
| 9400 PropertyAttributes attributes = self->GetLocalElementAttribute(i); |
| 9401 if (attributes == ABSENT) continue; |
| 9402 // A non-configurable property will cause the truncation operation to |
| 9403 // stop at this index. |
| 9404 if (attributes == DONT_DELETE) break; |
| 9405 // TODO(adamk): Don't fetch the old value if it's an accessor. |
| 9406 old_values.Add(Object::GetElement(self, i)); |
| 9407 indices.Add(isolate->factory()->Uint32ToString(i)); |
| 9408 } |
| 9409 |
| 9410 MaybeObject* result = |
| 9411 self->GetElementsAccessor()->SetLength(*self, *new_length_handle); |
| 9412 Handle<Object> hresult; |
| 9413 if (!result->ToHandle(&hresult)) return result; |
| 9414 |
| 9415 CHECK(self->length()->ToArrayIndex(&new_length)); |
| 9416 if (old_length != new_length) { |
| 9417 for (int i = 0; i < indices.length(); ++i) { |
| 9418 JSObject::EnqueueChangeRecord( |
| 9419 self, "deleted", indices[i], old_values[i]); |
| 9420 } |
| 9421 JSObject::EnqueueChangeRecord( |
| 9422 self, "updated", isolate->factory()->length_symbol(), |
| 9423 old_length_handle); |
| 9424 } |
| 9425 return *hresult; |
9382 } | 9426 } |
9383 | 9427 |
9384 | 9428 |
9385 Map* Map::GetPrototypeTransition(Object* prototype) { | 9429 Map* Map::GetPrototypeTransition(Object* prototype) { |
9386 FixedArray* cache = GetPrototypeTransitions(); | 9430 FixedArray* cache = GetPrototypeTransitions(); |
9387 int number_of_transitions = NumberOfProtoTransitions(); | 9431 int number_of_transitions = NumberOfProtoTransitions(); |
9388 const int proto_offset = | 9432 const int proto_offset = |
9389 kProtoTransitionHeaderSize + kProtoTransitionPrototypeOffset; | 9433 kProtoTransitionHeaderSize + kProtoTransitionPrototypeOffset; |
9390 const int map_offset = kProtoTransitionHeaderSize + kProtoTransitionMapOffset; | 9434 const int map_offset = kProtoTransitionHeaderSize + kProtoTransitionMapOffset; |
9391 const int step = kProtoTransitionElementsPerEntry; | 9435 const int step = kProtoTransitionElementsPerEntry; |
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13859 set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER); | 13903 set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER); |
13860 set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER); | 13904 set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER); |
13861 set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER); | 13905 set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER); |
13862 set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER); | 13906 set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER); |
13863 set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER); | 13907 set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER); |
13864 set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER); | 13908 set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER); |
13865 set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER); | 13909 set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER); |
13866 } | 13910 } |
13867 | 13911 |
13868 } } // namespace v8::internal | 13912 } } // namespace v8::internal |
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