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1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
2 // All Rights Reserved. | 2 // All Rights Reserved. |
3 // | 3 // |
4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
5 // modification, are permitted provided that the following conditions are | 5 // modification, are permitted provided that the following conditions are |
6 // met: | 6 // met: |
7 // | 7 // |
8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, |
9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. |
10 // | 10 // |
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580 return answer; | 580 return answer; |
581 } | 581 } |
582 | 582 |
583 void* address_; | 583 void* address_; |
584 }; | 584 }; |
585 | 585 |
586 | 586 |
587 // ----------------------------------------------------------------------------- | 587 // ----------------------------------------------------------------------------- |
588 // Position recording support | 588 // Position recording support |
589 | 589 |
590 enum PositionRecordingType { FORCED_POSITION, NORMAL_POSITION }; | 590 struct PositionState { |
| 591 PositionState() : current_position(RelocInfo::kNoPosition), |
| 592 written_position(RelocInfo::kNoPosition), |
| 593 current_statement_position(RelocInfo::kNoPosition), |
| 594 written_statement_position(RelocInfo::kNoPosition) {} |
| 595 |
| 596 int current_position; |
| 597 int written_position; |
| 598 |
| 599 int current_statement_position; |
| 600 int written_statement_position; |
| 601 }; |
| 602 |
591 | 603 |
592 class PositionsRecorder BASE_EMBEDDED { | 604 class PositionsRecorder BASE_EMBEDDED { |
593 public: | 605 public: |
594 explicit PositionsRecorder(Assembler* assembler) | 606 explicit PositionsRecorder(Assembler* assembler) |
595 : assembler_(assembler), | 607 : assembler_(assembler) {} |
596 current_position_(RelocInfo::kNoPosition), | |
597 current_position_recording_type_(NORMAL_POSITION), | |
598 written_position_(RelocInfo::kNoPosition), | |
599 current_statement_position_(RelocInfo::kNoPosition), | |
600 written_statement_position_(RelocInfo::kNoPosition) { } | |
601 | 608 |
602 // Set current position to pos. If recording_type is FORCED_POSITION then | 609 // Set current position to pos. |
603 // WriteRecordedPositions will write this position even if it is equal to | 610 void RecordPosition(int pos); |
604 // statement position previously written for another pc. | |
605 void RecordPosition(int pos, | |
606 PositionRecordingType recording_type = NORMAL_POSITION); | |
607 | 611 |
608 // Set current statement position to pos. | 612 // Set current statement position to pos. |
609 void RecordStatementPosition(int pos); | 613 void RecordStatementPosition(int pos); |
610 | 614 |
611 // Write recorded positions to relocation information. | 615 // Write recorded positions to relocation information. |
612 bool WriteRecordedPositions(); | 616 bool WriteRecordedPositions(); |
613 | 617 |
614 int current_position() const { return current_position_; } | 618 int current_position() const { return state_.current_position; } |
615 | 619 |
616 int current_statement_position() const { return current_statement_position_; } | 620 int current_statement_position() const { |
| 621 return state_.current_statement_position; |
| 622 } |
617 | 623 |
618 private: | 624 private: |
619 Assembler* assembler_; | 625 Assembler* assembler_; |
| 626 PositionState state_; |
620 | 627 |
621 int current_position_; | 628 friend class PreservePositionScope; |
622 PositionRecordingType current_position_recording_type_; | |
623 int written_position_; | |
624 | 629 |
625 int current_statement_position_; | 630 DISALLOW_COPY_AND_ASSIGN(PositionsRecorder); |
626 int written_statement_position_; | |
627 }; | 631 }; |
628 | 632 |
629 | 633 |
630 class PreserveStatementPositionScope BASE_EMBEDDED { | 634 class PreservePositionScope BASE_EMBEDDED { |
631 public: | 635 public: |
632 explicit PreserveStatementPositionScope(PositionsRecorder* positions_recorder) | 636 explicit PreservePositionScope(PositionsRecorder* positions_recorder) |
633 : positions_recorder_(positions_recorder), | 637 : positions_recorder_(positions_recorder), |
634 statement_position_(positions_recorder->current_statement_position()) {} | 638 saved_state_(positions_recorder->state_) {} |
635 | 639 |
636 ~PreserveStatementPositionScope() { | 640 ~PreservePositionScope() { |
637 if (statement_position_ != RelocInfo::kNoPosition) { | 641 positions_recorder_->state_ = saved_state_; |
638 positions_recorder_->RecordStatementPosition(statement_position_); | |
639 } | |
640 } | 642 } |
641 | 643 |
642 private: | 644 private: |
643 PositionsRecorder* positions_recorder_; | 645 PositionsRecorder* positions_recorder_; |
644 int statement_position_; | 646 const PositionState saved_state_; |
| 647 |
| 648 DISALLOW_COPY_AND_ASSIGN(PreservePositionScope); |
645 }; | 649 }; |
646 | 650 |
647 | 651 |
648 // ----------------------------------------------------------------------------- | 652 // ----------------------------------------------------------------------------- |
649 // Utility functions | 653 // Utility functions |
650 | 654 |
651 static inline bool is_intn(int x, int n) { | 655 static inline bool is_intn(int x, int n) { |
652 return -(1 << (n-1)) <= x && x < (1 << (n-1)); | 656 return -(1 << (n-1)) <= x && x < (1 << (n-1)); |
653 } | 657 } |
654 | 658 |
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678 unsigned int num_bits_set; | 682 unsigned int num_bits_set; |
679 for (num_bits_set = 0; x; x >>= 1) { | 683 for (num_bits_set = 0; x; x >>= 1) { |
680 num_bits_set += x & 1; | 684 num_bits_set += x & 1; |
681 } | 685 } |
682 return num_bits_set; | 686 return num_bits_set; |
683 } | 687 } |
684 | 688 |
685 } } // namespace v8::internal | 689 } } // namespace v8::internal |
686 | 690 |
687 #endif // V8_ASSEMBLER_H_ | 691 #endif // V8_ASSEMBLER_H_ |
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