AuroraMiddleware/mimalloc
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don't align to sizes greater than than the allocation size

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daan 2019-09-07 12:01:54 -07:00
parent b241910810
commit 0aec6d9302
1 changed files with 2 additions and 1 deletions
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src/alloc-aligned.c
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@ -18,8 +18,9 @@ static void* mi_heap_malloc_zero_aligned_at(mi_heap_t* heap, size_t size, size_t
// note: we don't require `size > offset`, we just guarantee that // note: we don't require `size > offset`, we just guarantee that
// the address at offset is aligned regardless of the allocated size. // the address at offset is aligned regardless of the allocated size.
mi_assert(alignment > 0 && alignment % sizeof(uintptr_t) == 0); mi_assert(alignment > 0 && alignment % sizeof(uintptr_t) == 0);
if (alignment <= sizeof(uintptr_t)) return _mi_heap_malloc_zero(heap,size,zero);
if (mi_unlikely(size > PTRDIFF_MAX)) return NULL; // we don't allocate more than PTRDIFF_MAX (see <https://sourceware.org/ml/libc-announce/2019/msg00001.html>) if (mi_unlikely(size > PTRDIFF_MAX)) return NULL; // we don't allocate more than PTRDIFF_MAX (see <https://sourceware.org/ml/libc-announce/2019/msg00001.html>)
// note: we require that alignment is smaller than `size`
if (mi_unlikely(alignment <= sizeof(uintptr_t) || alignment >= size)) return _mi_heap_malloc_zero(heap,size,zero);
// try if there is a current small block with just the right alignment // try if there is a current small block with just the right alignment
if (size <= MI_SMALL_SIZE_MAX) { if (size <= MI_SMALL_SIZE_MAX) {