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revise the segment map to only apply to OS allocated segments and reduce the .BSS footprint

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daanx 2024-06-02 14:46:59 -07:00
parent 5501f59f6c
commit a964322a21
4 changed files with 82 additions and 105 deletions
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4
src/arena.c
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@ -36,7 +36,7 @@ The arena allocation needs to be thread safe and we use an atomic bitmap to allo
typedef uintptr_t mi_block_info_t;
#define MI_ARENA_BLOCK_SIZE (MI_SEGMENT_SIZE) // 64MiB (must be at least MI_SEGMENT_ALIGN)
#define MI_ARENA_MIN_OBJ_SIZE (MI_ARENA_BLOCK_SIZE/2) // 32MiB
#define MI_MAX_ARENAS (255) // Limited as the reservation exponentially increases (and takes up .bss)
#define MI_MAX_ARENAS (132) // Limited as the reservation exponentially increases (and takes up .bss)
// A memory arena descriptor
typedef struct mi_arena_s {
@ -735,7 +735,7 @@ void _mi_arena_unsafe_destroy_all(mi_stats_t* stats) {
bool _mi_arena_contains(const void* p) {
const size_t max_arena = mi_atomic_load_relaxed(&mi_arena_count);
for (size_t i = 0; i < max_arena; i++) {
mi_arena_t* arena = mi_atomic_load_ptr_acquire(mi_arena_t, &mi_arenas[i]);
mi_arena_t* arena = mi_atomic_load_ptr_relaxed(mi_arena_t, &mi_arenas[i]);
if (arena != NULL && arena->start <= (const uint8_t*)p && arena->start + mi_arena_block_size(arena->block_count) > (const uint8_t*)p) {
return true;
}