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mem: Poison unused memory more thoroughly

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Feoramund
2025-06-14 13:21:15 -04:00
parent ae96b276c1
commit 5798151a0e
1 changed files with 3 additions and 0 deletions
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core/mem/allocators.odin
+3
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@@ -1156,6 +1156,7 @@ stack_resize_bytes_non_zeroed :: proc(
data, err := stack_alloc_bytes_non_zeroed(s, size, alignment, loc) data, err := stack_alloc_bytes_non_zeroed(s, size, alignment, loc)
if err == nil { if err == nil {
runtime.copy(data, byte_slice(old_memory, old_size)) runtime.copy(data, byte_slice(old_memory, old_size))
sanitizer.address_poison(old_memory)
} }
return data, err return data, err
} }
@@ -1165,6 +1166,8 @@ stack_resize_bytes_non_zeroed :: proc(
s.curr_offset += diff // works for smaller sizes too s.curr_offset += diff // works for smaller sizes too
if diff > 0 { if diff > 0 {
zero(rawptr(curr_addr + uintptr(diff)), diff) zero(rawptr(curr_addr + uintptr(diff)), diff)
} else {
sanitizer.address_poison(old_data[size:])
} }
result := byte_slice(old_memory, size) result := byte_slice(old_memory, size)
ensure_poisoned(result) ensure_poisoned(result)