8025852: Remove unnecessary setters in collector policy classes
Summary: Use instance variables directly within the collector policy classes and remove unused setters.
Reviewed-by: tschatzl, jcoomes
/*
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* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
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* 2 along with this work; if not, write to the Free Software Foundation,
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#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1CARDCOUNTS_HPP
#define SHARE_VM_GC_IMPLEMENTATION_G1_G1CARDCOUNTS_HPP
#include "memory/allocation.hpp"
#include "runtime/virtualspace.hpp"
#include "utilities/globalDefinitions.hpp"
class CardTableModRefBS;
class G1CollectedHeap;
class HeapRegion;
// Table to track the number of times a card has been refined. Once
// a card has been refined a certain number of times, it is
// considered 'hot' and its refinement is delayed by inserting the
// card into the hot card cache. The card will then be refined when
// it is evicted from the hot card cache, or when the hot card cache
// is 'drained' during the next evacuation pause.
class G1CardCounts: public CHeapObj<mtGC> {
G1CollectedHeap* _g1h;
// The table of counts
jubyte* _card_counts;
// Max capacity of the reserved space for the counts table
size_t _reserved_max_card_num;
// Max capacity of the committed space for the counts table
size_t _committed_max_card_num;
// Size of committed space for the counts table
size_t _committed_size;
// CardTable bottom.
const jbyte* _ct_bot;
// Barrier set
CardTableModRefBS* _ct_bs;
// The virtual memory backing the counts table
VirtualSpace _card_counts_storage;
// Returns true if the card counts table has been reserved.
bool has_reserved_count_table() { return _card_counts != NULL; }
// Returns true if the card counts table has been reserved and committed.
bool has_count_table() {
return has_reserved_count_table() && _committed_max_card_num > 0;
}
size_t ptr_2_card_num(const jbyte* card_ptr) {
assert(card_ptr >= _ct_bot,
err_msg("Invalid card pointer: "
"card_ptr: " PTR_FORMAT ", "
"_ct_bot: " PTR_FORMAT,
card_ptr, _ct_bot));
size_t card_num = pointer_delta(card_ptr, _ct_bot, sizeof(jbyte));
assert(card_num >= 0 && card_num < _committed_max_card_num,
err_msg("card pointer out of range: " PTR_FORMAT, card_ptr));
return card_num;
}
jbyte* card_num_2_ptr(size_t card_num) {
assert(card_num >= 0 && card_num < _committed_max_card_num,
err_msg("card num out of range: "SIZE_FORMAT, card_num));
return (jbyte*) (_ct_bot + card_num);
}
// Helper routine.
// Returns the number of cards that can be counted by the given committed
// table size, with a maximum of the number of cards spanned by the max
// capacity of the heap.
size_t committed_to_card_num(size_t committed_size) {
return MIN2(_reserved_max_card_num, committed_size / sizeof(jbyte));
}
// Clear the counts table for the given (exclusive) index range.
void clear_range(size_t from_card_num, size_t to_card_num);
public:
G1CardCounts(G1CollectedHeap* g1h);
~G1CardCounts();
void initialize();
// Resize the committed space for the card counts table in
// response to a resize of the committed space for the heap.
void resize(size_t heap_capacity);
// Increments the refinement count for the given card.
// Returns the pre-increment count value.
uint add_card_count(jbyte* card_ptr);
// Returns true if the given count is high enough to be considered
// 'hot'; false otherwise.
bool is_hot(uint count);
// Clears the card counts for the cards spanned by the region
void clear_region(HeapRegion* hr);
// Clear the entire card counts table during GC.
// Updates the policy stats with the duration.
void clear_all();
};
#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1CARDCOUNTS_HPP