Mercurial > hg > truffle
diff src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp @ 20337:1f1d373cd044
8038423: G1: Decommit memory within heap
Summary: Allow G1 to decommit memory of arbitrary regions within the heap and their associated auxiliary data structures card table, BOT, hot card cache, and mark bitmaps.
Reviewed-by: mgerdin, brutisso, jwilhelm
| author | tschatzl |
|---|---|
| date | Thu, 21 Aug 2014 11:47:10 +0200 |
| parents | e5035defa3c4 |
| children | c02ec279b062 |
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--- a/src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp Tue Aug 19 10:50:27 2014 +0200 +++ b/src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp Thu Aug 21 11:47:10 2014 +0200 @@ -25,6 +25,7 @@ #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP #define SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP +#include "gc_implementation/g1/g1RegionToSpaceMapper.hpp" #include "memory/cardTableModRefBS.hpp" #include "memory/memRegion.hpp" #include "oops/oop.inline.hpp" @@ -33,6 +34,7 @@ #if INCLUDE_ALL_GCS class DirtyCardQueueSet; +class G1SATBCardTableLoggingModRefBS; // This barrier is specialized to use a logging barrier to support // snapshot-at-the-beginning marking. @@ -126,18 +128,40 @@ jbyte val = _byte_map[card_index]; return (val & (clean_card_mask_val() | deferred_card_val())) == deferred_card_val(); } +}; +class G1SATBCardTableLoggingModRefBSChangedListener : public G1MappingChangedListener { + private: + G1SATBCardTableLoggingModRefBS* _card_table; + public: + G1SATBCardTableLoggingModRefBSChangedListener() : _card_table(NULL) { } + + void set_card_table(G1SATBCardTableLoggingModRefBS* card_table) { _card_table = card_table; } + + virtual void on_commit(uint start_idx, size_t num_regions); }; // Adds card-table logging to the post-barrier. // Usual invariant: all dirty cards are logged in the DirtyCardQueueSet. class G1SATBCardTableLoggingModRefBS: public G1SATBCardTableModRefBS { + friend class G1SATBCardTableLoggingModRefBSChangedListener; private: + G1SATBCardTableLoggingModRefBSChangedListener _listener; DirtyCardQueueSet& _dcqs; public: + static size_t compute_size(size_t mem_region_size_in_words) { + size_t number_of_slots = (mem_region_size_in_words / card_size_in_words); + return ReservedSpace::allocation_align_size_up(number_of_slots); + } + G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, int max_covered_regions); + virtual void initialize() { } + virtual void initialize(G1RegionToSpaceMapper* mapper); + + virtual void resize_covered_region(MemRegion new_region) { ShouldNotReachHere(); } + bool is_a(BarrierSet::Name bsn) { return bsn == BarrierSet::G1SATBCTLogging || G1SATBCardTableModRefBS::is_a(bsn); @@ -154,8 +178,6 @@ void write_region_work(MemRegion mr) { invalidate(mr); } void write_ref_array_work(MemRegion mr) { invalidate(mr); } - - };