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specialize bitmap operations for common page sizes

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daanx 2024-12-07 16:26:07 -08:00
parent bf42759d97
commit d0c86f3f0e
3 changed files with 175 additions and 243 deletions
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8
src/page-map.c
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@ -55,14 +55,14 @@ static void mi_page_map_ensure_committed(size_t idx, size_t slice_count) {
const size_t commit_bit_idx_lo = idx / mi_page_map_entries_per_commit_bit;
const size_t commit_bit_idx_hi = (idx + slice_count - 1) / mi_page_map_entries_per_commit_bit;
for (size_t i = commit_bit_idx_lo; i <= commit_bit_idx_hi; i++) { // per bit to avoid crossing over bitmap chunks
if (mi_bitmap_is_xsetN(MI_BIT_CLEAR, &mi_page_map_commit, i, 1)) {
if (mi_bitmap_is_clearN(&mi_page_map_commit, i, 1)) {
// this may race, in which case we do multiple commits (which is ok)
bool is_zero;
uint8_t* const start = _mi_page_map + (i*mi_page_map_entries_per_commit_bit);
const size_t size = mi_page_map_entries_per_commit_bit;
_mi_os_commit(start, size, &is_zero, NULL);
_mi_os_commit(start, size, &is_zero, NULL);
if (!is_zero && !mi_page_map_memid.initially_zero) { _mi_memzero(start,size); }
mi_bitmap_xsetN(MI_BIT_SET, &mi_page_map_commit, i, 1, NULL);
mi_bitmap_set(&mi_page_map_commit, i);
}
}
#if MI_DEBUG > 0
@ -119,7 +119,7 @@ void _mi_page_map_unregister(mi_page_t* page) {
mi_decl_nodiscard mi_decl_export bool mi_is_in_heap_region(const void* p) mi_attr_noexcept {
uintptr_t idx = ((uintptr_t)p >> MI_ARENA_SLICE_SHIFT);
if (!mi_page_map_all_committed || mi_bitmap_is_xsetN(MI_BIT_SET, &mi_page_map_commit, idx/mi_page_map_entries_per_commit_bit, 1)) {
if (!mi_page_map_all_committed || mi_bitmap_is_setN(&mi_page_map_commit, idx/mi_page_map_entries_per_commit_bit, 1)) {
return (_mi_page_map[idx] != 0);
}
else {