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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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545 | 545 |
546 private: | 546 private: |
547 // Global (weak) handle to the deoptimizing code object. | 547 // Global (weak) handle to the deoptimizing code object. |
548 Handle<Code> code_; | 548 Handle<Code> code_; |
549 | 549 |
550 // Next pointer for linked list. | 550 // Next pointer for linked list. |
551 DeoptimizingCodeListNode* next_; | 551 DeoptimizingCodeListNode* next_; |
552 }; | 552 }; |
553 | 553 |
554 | 554 |
555 class SlotRef BASE_EMBEDDED { | |
556 public: | |
557 enum SlotRepresentation { | |
558 UNKNOWN, | |
559 TAGGED, | |
560 INT32, | |
561 DOUBLE, | |
562 LITERAL | |
563 }; | |
564 | |
565 SlotRef() | |
566 : addr_(NULL), representation_(UNKNOWN) { } | |
567 | |
568 SlotRef(Address addr, SlotRepresentation representation) | |
569 : addr_(addr), representation_(representation) { } | |
570 | |
571 explicit SlotRef(Object* literal) | |
572 : literal_(literal), representation_(LITERAL) { } | |
573 | |
574 Handle<Object> GetValue() { | |
575 switch (representation_) { | |
576 case TAGGED: | |
577 return Handle<Object>(Memory::Object_at(addr_)); | |
578 | |
579 case INT32: { | |
580 int value = Memory::int32_at(addr_); | |
581 if (Smi::IsValid(value)) { | |
582 return Handle<Object>(Smi::FromInt(value)); | |
583 } else { | |
584 return Isolate::Current()->factory()->NewNumberFromInt(value); | |
585 } | |
586 } | |
587 | |
588 case DOUBLE: { | |
589 double value = Memory::double_at(addr_); | |
590 return Isolate::Current()->factory()->NewNumber(value); | |
591 } | |
592 | |
593 case LITERAL: | |
594 return literal_; | |
595 | |
596 default: | |
597 UNREACHABLE(); | |
598 return Handle<Object>::null(); | |
599 } | |
600 } | |
601 | |
602 static void ComputeSlotMappingForArguments(JavaScriptFrame* frame, | |
603 int inlined_frame_index, | |
604 Vector<SlotRef>* args_slots); | |
605 | |
606 private: | |
607 Address addr_; | |
608 Handle<Object> literal_; | |
609 SlotRepresentation representation_; | |
610 | |
611 static Address SlotAddress(JavaScriptFrame* frame, int slot_index) { | |
612 if (slot_index >= 0) { | |
613 const int offset = JavaScriptFrameConstants::kLocal0Offset; | |
614 return frame->fp() + offset - (slot_index * kPointerSize); | |
615 } else { | |
616 const int offset = JavaScriptFrameConstants::kSavedRegistersOffset; | |
Kevin Millikin (Chromium)
2011/04/01 08:53:16
kSavedRegistersOffset is an archaic name. Maybe i
| |
617 return frame->fp() + offset - ((slot_index + 1) * kPointerSize); | |
618 } | |
619 } | |
620 | |
621 static SlotRef ComputeSlotForNextArgument(TranslationIterator* iterator, | |
622 DeoptimizationInputData* data, | |
623 JavaScriptFrame* frame); | |
624 }; | |
625 | |
626 | |
555 } } // namespace v8::internal | 627 } } // namespace v8::internal |
556 | 628 |
557 #endif // V8_DEOPTIMIZER_H_ | 629 #endif // V8_DEOPTIMIZER_H_ |
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