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8189871: Refactor GC barriers to use declarative semantics

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Reviewed-by: pliden, rkennke, coleenp, dholmes, kbarrett, stefank
This commit is contained in:
Erik Österlund 2017-11-20 13:07:44 +01:00
parent 63122ba705
commit 3e5e2f03b1
45 changed files with 3458 additions and 806 deletions
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25
src/hotspot/share/gc/shared/cardTableModRefBS.hpp
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@ -26,7 +26,6 @@
#define SHARE_VM_GC_SHARED_CARDTABLEMODREFBS_HPP
#include "gc/shared/modRefBarrierSet.hpp"
#include "oops/oop.hpp"
#include "utilities/align.hpp"
// This kind of "BarrierSet" allows a "CollectedHeap" to detect and
@ -181,14 +180,6 @@ class CardTableModRefBS: public ModRefBarrierSet {
CardTableModRefBS(MemRegion whole_heap, const BarrierSet::FakeRtti& fake_rtti);
~CardTableModRefBS();
// Record a reference update. Note that these versions are precise!
// The scanning code has to handle the fact that the write barrier may be
// either precise or imprecise. We make non-virtual inline variants of
// these functions here for performance.
void write_ref_field_work(oop obj, size_t offset, oop newVal);
virtual void write_ref_field_work(void* field, oop newVal, bool release);
protected:
void write_region_work(MemRegion mr) {
dirty_MemRegion(mr);
@ -206,9 +197,12 @@ class CardTableModRefBS: public ModRefBarrierSet {
// *** Card-table-barrier-specific things.
template <class T> inline void inline_write_ref_field_pre(T* field, oop newVal) {}
template <class T> inline void inline_write_ref_field(T* field, oop newVal, bool release);
// Record a reference update. Note that these versions are precise!
// The scanning code has to handle the fact that the write barrier may be
// either precise or imprecise. We make non-virtual inline variants of
// these functions here for performance.
template <DecoratorSet decorators, typename T>
void write_ref_field_post(T* field, oop newVal);
// These are used by G1, when it uses the card table as a temporary data
// structure for card claiming.
@ -319,6 +313,9 @@ class CardTableModRefBS: public ModRefBarrierSet {
void verify_region(MemRegion mr, jbyte val, bool val_equals) PRODUCT_RETURN;
void verify_not_dirty_region(MemRegion mr) PRODUCT_RETURN;
void verify_dirty_region(MemRegion mr) PRODUCT_RETURN;
template <DecoratorSet decorators, typename BarrierSetT = CardTableModRefBS>
class AccessBarrier: public ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT> {};
};
template<>
@ -326,5 +323,9 @@ struct BarrierSet::GetName<CardTableModRefBS> {
static const BarrierSet::Name value = BarrierSet::CardTableModRef;
};
template<>
struct BarrierSet::GetType<BarrierSet::CardTableModRef> {
typedef CardTableModRefBS type;
};
#endif // SHARE_VM_GC_SHARED_CARDTABLEMODREFBS_HPP