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comparison src/share/vm/gc_implementation/g1/heapRegion.hpp @ 6254:a2f7274eb6ef

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7114678: G1: various small fixes, code cleanup, and refactoring Summary: Various cleanups as a prelude to introducing iterators for HeapRegions. Reviewed-by: johnc, brutisso
author tonyp
date Thu, 19 Jul 2012 15:15:54 -0700
parents 8a2e5a6a19a4
children da91efe96a93
comparison
equal deleted inserted replaced
6253:db823a892a55 6254:a2f7274eb6ef
53 class HeapRegionSetBase; 53 class HeapRegionSetBase;
54 54
55 #define HR_FORMAT "%u:(%s)["PTR_FORMAT","PTR_FORMAT","PTR_FORMAT"]" 55 #define HR_FORMAT "%u:(%s)["PTR_FORMAT","PTR_FORMAT","PTR_FORMAT"]"
56 #define HR_FORMAT_PARAMS(_hr_) \ 56 #define HR_FORMAT_PARAMS(_hr_) \
57 (_hr_)->hrs_index(), \ 57 (_hr_)->hrs_index(), \
58 (_hr_)->is_survivor() ? "S" : (_hr_)->is_young() ? "E" : "-", \ 58 (_hr_)->is_survivor() ? "S" : (_hr_)->is_young() ? "E" : \
59 (_hr_)->startsHumongous() ? "HS" : \
60 (_hr_)->continuesHumongous() ? "HC" : \
61 !(_hr_)->is_empty() ? "O" : "F", \
59 (_hr_)->bottom(), (_hr_)->top(), (_hr_)->end() 62 (_hr_)->bottom(), (_hr_)->top(), (_hr_)->end()
60 63
61 // sentinel value for hrs_index 64 // sentinel value for hrs_index
62 #define G1_NULL_HRS_INDEX ((uint) -1) 65 #define G1_NULL_HRS_INDEX ((uint) -1)
63 66
171 void set_end(HeapWord* value); 174 void set_end(HeapWord* value);
172 175
173 virtual HeapWord* saved_mark_word() const; 176 virtual HeapWord* saved_mark_word() const;
174 virtual void set_saved_mark(); 177 virtual void set_saved_mark();
175 void reset_gc_time_stamp() { _gc_time_stamp = 0; } 178 void reset_gc_time_stamp() { _gc_time_stamp = 0; }
179 unsigned get_gc_time_stamp() { return _gc_time_stamp; }
176 180
177 // See the comment above in the declaration of _pre_dummy_top for an 181 // See the comment above in the declaration of _pre_dummy_top for an
178 // explanation of what it is. 182 // explanation of what it is.
179 void set_pre_dummy_top(HeapWord* pre_dummy_top) { 183 void set_pre_dummy_top(HeapWord* pre_dummy_top) {
180 assert(is_in(pre_dummy_top) && pre_dummy_top <= top(), "pre-condition"); 184 assert(is_in(pre_dummy_top) && pre_dummy_top <= top(), "pre-condition");
435 bool startsHumongous() const { return _humongous_type == StartsHumongous; } 439 bool startsHumongous() const { return _humongous_type == StartsHumongous; }
436 bool continuesHumongous() const { return _humongous_type == ContinuesHumongous; } 440 bool continuesHumongous() const { return _humongous_type == ContinuesHumongous; }
437 // For a humongous region, region in which it starts. 441 // For a humongous region, region in which it starts.
438 HeapRegion* humongous_start_region() const { 442 HeapRegion* humongous_start_region() const {
439 return _humongous_start_region; 443 return _humongous_start_region;
444 }
445
446 // Return the number of distinct regions that are covered by this region:
447 // 1 if the region is not humongous, >= 1 if the region is humongous.
448 uint region_num() const {
449 if (!isHumongous()) {
450 return 1U;
451 } else {
452 assert(startsHumongous(), "doesn't make sense on HC regions");
453 assert(capacity() % HeapRegion::GrainBytes == 0, "sanity");
454 return (uint) (capacity() >> HeapRegion::LogOfHRGrainBytes);
455 }
456 }
457
458 // Return the index + 1 of the last HC regions that's associated
459 // with this HS region.
460 uint last_hc_index() const {
461 assert(startsHumongous(), "don't call this otherwise");
462 return hrs_index() + region_num();
440 } 463 }
441 464
442 // Same as Space::is_in_reserved, but will use the original size of the region. 465 // Same as Space::is_in_reserved, but will use the original size of the region.
443 // The original size is different only for start humongous regions. They get 466 // The original size is different only for start humongous regions. They get
444 // their _end set up to be the end of the last continues region of the 467 // their _end set up to be the end of the last continues region of the
620 // Returns "false" iff no object in the region was allocated when the 643 // Returns "false" iff no object in the region was allocated when the
621 // last mark phase ended. 644 // last mark phase ended.
622 bool is_marked() { return _prev_top_at_mark_start != bottom(); } 645 bool is_marked() { return _prev_top_at_mark_start != bottom(); }
623 646
624 void reset_during_compaction() { 647 void reset_during_compaction() {
625 guarantee( isHumongous() && startsHumongous(), 648 assert(isHumongous() && startsHumongous(),
626 "should only be called for humongous regions"); 649 "should only be called for starts humongous regions");
627 650
628 zero_marked_bytes(); 651 zero_marked_bytes();
629 init_top_at_mark_start(); 652 init_top_at_mark_start();
630 } 653 }
631 654
772 795
773 #define HeapRegion_OOP_SINCE_SAVE_MARKS_DECL(OopClosureType, nv_suffix) \ 796 #define HeapRegion_OOP_SINCE_SAVE_MARKS_DECL(OopClosureType, nv_suffix) \
774 virtual void oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl); 797 virtual void oop_since_save_marks_iterate##nv_suffix(OopClosureType* cl);
775 SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(HeapRegion_OOP_SINCE_SAVE_MARKS_DECL) 798 SPECIALIZED_SINCE_SAVE_MARKS_CLOSURES(HeapRegion_OOP_SINCE_SAVE_MARKS_DECL)
776 799
777 CompactibleSpace* next_compaction_space() const; 800 virtual CompactibleSpace* next_compaction_space() const;
778 801
779 virtual void reset_after_compaction(); 802 virtual void reset_after_compaction();
780 803
781 void print() const; 804 void print() const;
782 void print_on(outputStream* st) const; 805 void print_on(outputStream* st) const;