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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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629 Top::context()->global_context()->arguments_boilerplate()->map(); | 629 Top::context()->global_context()->arguments_boilerplate()->map(); |
630 | 630 |
631 bool is_arguments_object_with_fast_elements = | 631 bool is_arguments_object_with_fast_elements = |
632 receiver->IsJSObject() | 632 receiver->IsJSObject() |
633 && JSObject::cast(receiver)->map() == arguments_map | 633 && JSObject::cast(receiver)->map() == arguments_map |
634 && JSObject::cast(receiver)->HasFastElements(); | 634 && JSObject::cast(receiver)->HasFastElements(); |
635 if (!is_arguments_object_with_fast_elements) { | 635 if (!is_arguments_object_with_fast_elements) { |
636 return CallJsBuiltin("ArraySlice", args); | 636 return CallJsBuiltin("ArraySlice", args); |
637 } | 637 } |
638 elms = FixedArray::cast(JSObject::cast(receiver)->elements()); | 638 elms = FixedArray::cast(JSObject::cast(receiver)->elements()); |
639 len = elms->length(); | 639 Object* len_obj = JSObject::cast(receiver) |
640 #ifdef DEBUG | 640 ->InObjectPropertyAt(Heap::arguments_length_index); |
641 // Arguments object by construction should have no holes, check it. | 641 if (!len_obj->IsSmi()) { |
642 if (FLAG_enable_slow_asserts) { | 642 return CallJsBuiltin("ArraySlice", args); |
643 for (int i = 0; i < len; i++) { | 643 } |
644 ASSERT(elms->get(i) != Heap::the_hole_value()); | 644 len = Smi::cast(len_obj)->value(); |
| 645 if (len > elms->length()) { |
| 646 return CallJsBuiltin("ArraySlice", args); |
| 647 } |
| 648 for (int i = 0; i < len; i++) { |
| 649 if (elms->get(i) == Heap::the_hole_value()) { |
| 650 return CallJsBuiltin("ArraySlice", args); |
645 } | 651 } |
646 } | 652 } |
647 #endif | |
648 } | 653 } |
649 ASSERT(len >= 0); | 654 ASSERT(len >= 0); |
650 int n_arguments = args.length() - 1; | 655 int n_arguments = args.length() - 1; |
651 | 656 |
652 // Note carefully choosen defaults---if argument is missing, | 657 // Note carefully choosen defaults---if argument is missing, |
653 // it's undefined which gets converted to 0 for relative_start | 658 // it's undefined which gets converted to 0 for relative_start |
654 // and to len for relative_end. | 659 // and to len for relative_end. |
655 int relative_start = 0; | 660 int relative_start = 0; |
656 int relative_end = len; | 661 int relative_end = len; |
657 if (n_arguments > 0) { | 662 if (n_arguments > 0) { |
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1597 if (entry->contains(pc)) { | 1602 if (entry->contains(pc)) { |
1598 return names_[i]; | 1603 return names_[i]; |
1599 } | 1604 } |
1600 } | 1605 } |
1601 } | 1606 } |
1602 return NULL; | 1607 return NULL; |
1603 } | 1608 } |
1604 | 1609 |
1605 | 1610 |
1606 } } // namespace v8::internal | 1611 } } // namespace v8::internal |
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