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improve free on macos

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This commit is contained in:
Daan 2025-02-05 20:55:21 -08:00
parent 1657bfb453
commit 515047b676
3 changed files with 26 additions and 17 deletions
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8
src/page-map.c
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@ -206,7 +206,7 @@ bool _mi_page_map_init(void) {
if (!mi_page_map_memid.initially_committed) {
_mi_os_commit(&_mi_page_map[0], os_page_size, NULL); // commit first part of the map
}
_mi_page_map[0] = (mi_page_t**)((uint8_t*)_mi_page_map + page_map_size); // we reserved 2 subs at the end already
_mi_page_map[0] = (mi_page_t**)((uint8_t*)_mi_page_map + page_map_size); // we reserved 2 sub maps at the end already
if (!mi_page_map_memid.initially_committed) {
_mi_os_commit(_mi_page_map[0], os_page_size, NULL); // only first OS page
}
@ -315,10 +315,10 @@ void _mi_page_map_unregister_range(void* start, size_t size) {
mi_page_map_set_range(NULL, idx, sub_idx, slice_count); // todo: avoid committing if not already committed?
}
// Return the empty page for the NULL pointer to match the behaviour of `_mi_ptr_page`
// Return NULL for invalid pointers
mi_page_t* _mi_safe_ptr_page(const void* p) {
if (p==NULL) return NULL;
if mi_unlikely(p >= mi_page_map_max_address) return NULL;
if (p == NULL) return (mi_page_t*)&_mi_page_empty; // to match `_mi_ptr_page` (see `mi_free` as well)
size_t sub_idx;
const size_t idx = _mi_page_map_index(p,&sub_idx);
if mi_unlikely(!mi_page_map_is_committed(idx,NULL)) return NULL;
@ -328,7 +328,7 @@ mi_page_t* _mi_safe_ptr_page(const void* p) {
}
mi_decl_nodiscard mi_decl_export bool mi_is_in_heap_region(const void* p) mi_attr_noexcept {
return (p != NULL && _mi_safe_ptr_page(p) != NULL);
return (_mi_safe_ptr_page(p) != NULL);
}
#endif