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Fixed alignment handling in mem.Dynamic_Arena.

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This commit is contained in:
Barinzaya
2026-06-24 00:50:52 -04:00
parent 5647a1b2fc
commit 583a397e1d
1 changed files with 9 additions and 5 deletions
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14
core/mem/allocators.odin
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@@ -1806,11 +1806,14 @@ dynamic_arena_alloc_bytes_non_zeroed :: proc(a: ^Dynamic_Arena, size: int, align
}
return memory, err
}
n := align_formula(size, max(a.minimum_alignment, alignment))
actual_alignment := max(a.minimum_alignment, alignment)
n := align_formula(size, actual_alignment)
if n > a.block_size {
return nil, .Invalid_Argument
}
if a.bytes_left < n {
memory := align_forward(a.current_pos, uintptr(actual_alignment))
margin := int(uintptr(memory) - uintptr(a.current_pos))
if a.bytes_left < margin + n {
err := _dynamic_arena_cycle_new_block(a, alignment, loc)
if err != nil {
return nil, err
@@ -1818,10 +1821,11 @@ dynamic_arena_alloc_bytes_non_zeroed :: proc(a: ^Dynamic_Arena, size: int, align
if a.current_block == nil {
return nil, .Out_Of_Memory
}
margin = 0
memory = a.current_pos
}
memory := a.current_pos
a.current_pos = ([^]byte)(a.current_pos)[n:]
a.bytes_left -= n
a.current_pos = ([^]byte)(memory)[n:]
a.bytes_left -= margin + n
result := ([^]byte)(memory)[:size]
// ensure_poisoned(result)
// sanitizer.address_unpoison(result)