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8292607: Remove unused dirty and dirty_card_range_after_reset in CardTable

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Reviewed-by: tschatzl
This commit is contained in:
Albert Mingkun Yang 2022-08-19 08:43:20 +00:00
parent 7d18ebd870
commit 63a126aa2d
2 changed files with 0 additions and 46 deletions
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38
src/hotspot/share/gc/shared/cardTable.cpp
View File

@ -379,44 +379,6 @@ void CardTable::clear(MemRegion mr) {
}
}
void CardTable::dirty(MemRegion mr) {
CardValue* first = byte_for(mr.start());
CardValue* last = byte_after(mr.last());
memset(first, dirty_card, last-first);
}
MemRegion CardTable::dirty_card_range_after_reset(MemRegion mr,
bool reset,
int reset_val) {
for (int i = 0; i < _cur_covered_regions; i++) {
MemRegion mri = mr.intersection(_covered[i]);
if (!mri.is_empty()) {
CardValue* cur_entry, *next_entry, *limit;
for (cur_entry = byte_for(mri.start()), limit = byte_for(mri.last());
cur_entry <= limit;
cur_entry = next_entry) {
next_entry = cur_entry + 1;
if (*cur_entry == dirty_card) {
size_t dirty_cards;
// Accumulate maximal dirty card range, starting at cur_entry
for (dirty_cards = 1;
next_entry <= limit && *next_entry == dirty_card;
dirty_cards++, next_entry++);
MemRegion cur_cards(addr_for(cur_entry),
dirty_cards * _card_size_in_words);
if (reset) {
for (size_t i = 0; i < dirty_cards; i++) {
cur_entry[i] = reset_val;
}
}
return cur_cards;
}
}
}
}
return MemRegion(mr.end(), mr.end());
}
uintx CardTable::ct_max_alignment_constraint() {
// Calculate maximum alignment using GCCardSizeInBytes as card_size hasn't been set yet
return GCCardSizeInBytes * os::vm_page_size();

8
src/hotspot/share/gc/shared/cardTable.hpp
View File

@ -173,7 +173,6 @@ public:
virtual void invalidate(MemRegion mr);
void clear(MemRegion mr);
void dirty(MemRegion mr);
// Provide read-only access to the card table array.
const CardValue* byte_for_const(const void* p) const {
@ -220,13 +219,6 @@ public:
static uintx ct_max_alignment_constraint();
// Return the MemRegion corresponding to the first maximal run
// of dirty cards lying completely within MemRegion mr.
// If reset is "true", then sets those card table entries to the given
// value.
MemRegion dirty_card_range_after_reset(MemRegion mr, bool reset,
int reset_val);
static uint card_shift() {
return _card_shift;
}