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fix rounding issue with huge size allocations

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daanx 2024-12-24 17:07:11 -08:00
parent d862e57955
commit 1e1a12bf3c
3 changed files with 12 additions and 14 deletions
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5
include/mimalloc/internal.h
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@ -706,9 +706,10 @@ static inline bool mi_page_is_huge(const mi_page_t* page) {
(mi_memkind_is_os(page->memid.memkind) && page->memid.mem.os.base < (void*)page));
}
static inline mi_page_queue_t* mi_page_queue(const mi_heap_t* heap, size_t size) {
return &((mi_heap_t*)heap)->pages[_mi_bin(size)];
mi_page_queue_t* const pq = &((mi_heap_t*)heap)->pages[_mi_bin(size)];
if (size <= MI_LARGE_MAX_OBJ_SIZE) { mi_assert_internal(pq->block_size <= MI_LARGE_MAX_OBJ_SIZE); }
return pq;
}

2
include/mimalloc/types.h
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@ -328,7 +328,7 @@ typedef struct mi_page_s {
// (Except for large pages since huge objects are allocated in 4MiB chunks)
#define MI_SMALL_MAX_OBJ_SIZE ((MI_SMALL_PAGE_SIZE-MI_PAGE_INFO_SIZE)/8) // < 8 KiB
#define MI_MEDIUM_MAX_OBJ_SIZE ((MI_MEDIUM_PAGE_SIZE-MI_PAGE_INFO_SIZE)/8) // < 64 KiB
#define MI_LARGE_MAX_OBJ_SIZE ((MI_LARGE_PAGE_SIZE-MI_PAGE_INFO_SIZE)/4) // < 512 KiB
#define MI_LARGE_MAX_OBJ_SIZE (MI_LARGE_PAGE_SIZE/4) // <= 512 KiB // note: this must be a nice power of 2 or we get rounding issues with _mi_bin
#define MI_LARGE_MAX_OBJ_WSIZE (MI_LARGE_MAX_OBJ_SIZE/MI_SIZE_SIZE)