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Mark the padding bytes no access #1076

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Mark the padding bytes no access #1076

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10 changes: 10 additions & 0 deletions src/page.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1016,6 +1016,16 @@ void* _mi_malloc_generic(mi_heap_t* heap, size_t size, bool zero, size_t huge_al
p = _mi_page_malloc_zero(heap, page, size, zero);
mi_assert_internal(p != NULL);
}

#if MI_PADDING
mi_padding_t* const padding = (mi_padding_t*)((uint8_t*)p + mi_page_usable_block_size(page));
size_t delta = padding->delta;

uint8_t* fill = (uint8_t*)padding - delta;
const size_t maxpad = (delta > MI_MAX_ALIGN_SIZE ? MI_MAX_ALIGN_SIZE : delta);
mi_track_mem_noaccess(fill, maxpad + MI_PADDING_SIZE);
#endif

// move singleton pages to the full queue
if (page->reserved == page->used) {
mi_page_to_full(page, mi_page_queue_of(page));
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