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Fix buddy allocator assert

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The last address of "data" is not "cast(uintptr)raw_data(data)+cast(uintptr)size" but
"cast(uintptr)raw_data(data)+cast(uintptr)(size-1)".

The original assert would fail when for example the allocation size requested and the buddy allocator allignment were both 64.
This commit is contained in:
alessio98888
2025-08-16 19:50:06 +02:00
parent fb46413071
commit c6db3cc670
1 changed files with 1 additions and 1 deletions
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core/mem/allocators.odin
+1 -1
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@@ -2331,7 +2331,7 @@ buddy_allocator_alloc_bytes_non_zeroed :: proc(b: ^Buddy_Allocator, size: uint)
} }
found.is_free = false found.is_free = false
data := ([^]byte)(found)[b.alignment:][:size] data := ([^]byte)(found)[b.alignment:][:size]
assert(cast(uintptr)raw_data(data)+cast(uintptr)size < cast(uintptr)buddy_block_next(found), "Buddy_Allocator has made an allocation which overlaps a block header.") assert(cast(uintptr)raw_data(data)+cast(uintptr)(size-1) < cast(uintptr)buddy_block_next(found), "Buddy_Allocator has made an allocation which overlaps a block header.")
// ensure_poisoned(data) // ensure_poisoned(data)
// sanitizer.address_unpoison(data) // sanitizer.address_unpoison(data)
return data, nil return data, nil