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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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9368 return this; | 9368 return this; |
9369 } | 9369 } |
9370 | 9370 |
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) { |
rossberg
2012/11/14 10:19:26
Add a comment to objects.h that this can cause GC
adamk
2012/11/14 15:56:25
Done.
| |
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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