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Zero only needed part of memory when changing size categories

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Feoramund
2025-04-13 22:22:12 -04:00
parent 92fdb4d79a
commit 920487be04
1 changed files with 4 additions and 1 deletions
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5
base/runtime/heap_allocator_implementation.odin
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@@ -1846,8 +1846,11 @@ heap_resize :: proc "contextless" (old_ptr: rawptr, old_size: int, new_size: int
if new_category != old_category {
// A change in size category cannot be optimized.
new_ptr = heap_alloc(new_size, zero_memory)
new_ptr = heap_alloc(new_size, false)
intrinsics.mem_copy_non_overlapping(new_ptr, old_ptr, min(old_size, new_size))
if zero_memory && new_size > old_size {
intrinsics.mem_zero_volatile(rawptr(uintptr(new_ptr) + uintptr(old_size)), new_size - old_size)
}
heap_free(old_ptr)
heap_debug_cover(.Resize_Crossed_Size_Categories)
return