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8278139: G1: Refactor G1BlockOffsetTablePart::block_at_or_preceding

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Reviewed-by: sjohanss, mli
This commit is contained in:
Albert Mingkun Yang 2021-12-03 10:58:14 +00:00
parent e4774e68e3
commit dda8f26ce0
1 changed files with 3 additions and 5 deletions
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8
src/hotspot/share/gc/g1/g1BlockOffsetTable.inline.hpp
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@ -119,20 +119,18 @@ inline HeapWord* G1BlockOffsetTablePart::block_at_or_preceding(const void* addr)
size_t index = _bot->index_for(addr);
HeapWord* q = _bot->address_for_index(index);
uint offset = _bot->offset_array(index); // Extend u_char to uint.
while (offset >= BOTConstants::N_words) {
// The excess of the offset from N_words indicates a power of Base
// to go back by.
size_t n_cards_back = BOTConstants::entry_to_cards_back(offset);
q -= (BOTConstants::N_words * n_cards_back);
index -= n_cards_back;
offset = _bot->offset_array(index);
}
assert(offset < BOTConstants::N_words, "offset too large");
q -= offset;
return q;
HeapWord* q = _bot->address_for_index(index);
return q - offset;
}
inline HeapWord* G1BlockOffsetTablePart::forward_to_block_containing_addr(HeapWord* q, HeapWord* n,