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maintain pages set for arenas; improve arena load/unload

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daanx 2024-12-11 22:06:25 -08:00
parent aed76f2910
commit 94ce342ea9
6 changed files with 97 additions and 22 deletions
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11
src/page-map.c
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@ -15,6 +15,7 @@ static size_t mi_page_map_entries_per_commit_bit = MI_ARENA_SLICE_SIZE;
static void* mi_page_map_max_address = NULL;
static mi_memid_t mi_page_map_memid;
// (note: we need to initialize statically or otherwise C++ may run a default constructors after process initialization)
static mi_bitmap_t mi_page_map_commit = { MI_ATOMIC_VAR_INIT(MI_BITMAP_DEFAULT_CHUNK_COUNT), MI_ATOMIC_VAR_INIT(0),
{ 0 }, { {MI_ATOMIC_VAR_INIT(0)} }, {{{ MI_ATOMIC_VAR_INIT(0) }}} };
@ -84,7 +85,7 @@ static size_t mi_page_map_get_idx(mi_page_t* page, uint8_t** page_start, size_t*
*page_start = mi_page_area(page, &page_size);
if (page_size > MI_LARGE_PAGE_SIZE) { page_size = MI_LARGE_PAGE_SIZE - MI_ARENA_SLICE_SIZE; } // furthest interior pointer
*slice_count = mi_slice_count_of_size(page_size) + (((uint8_t*)*page_start - (uint8_t*)page)/MI_ARENA_SLICE_SIZE); // add for large aligned blocks
return ((uintptr_t)page >> MI_ARENA_SLICE_SHIFT);
return _mi_page_map_index(page);
}
@ -113,16 +114,20 @@ void _mi_page_map_register(mi_page_t* page) {
void _mi_page_map_unregister(mi_page_t* page) {
mi_assert_internal(_mi_page_map != NULL);
// get index and count
uint8_t* page_start;
size_t slice_count;
const size_t idx = mi_page_map_get_idx(page, &page_start, &slice_count);
// unset the offsets
_mi_memzero(_mi_page_map + idx, slice_count);
}
void _mi_page_map_unregister_range(void* start, size_t size) {
const size_t slice_count = _mi_divide_up(size, MI_ARENA_SLICE_SIZE);
const uintptr_t index = _mi_page_map_index(start);
mi_page_map_ensure_committed(index, slice_count); // we commit the range in total; todo: scan the commit bits and clear only those ranges?
_mi_memzero(&_mi_page_map[index], slice_count);
}
mi_decl_nodiscard mi_decl_export bool mi_is_in_heap_region(const void* p) mi_attr_noexcept {
// if mi_unlikely(_mi_page_map==NULL) { // happens on macOS during loading