misaligned-atomic-64

Default severity: error

On 32-bit ARM, x86, and MIPS targets, callers must ensure that 64-bit words passed to legacy sync/atomic functions are aligned to 8 bytes. Put the 64-bit atomic field first in its allocated struct, or use the typed atomic wrappers that arrange their own alignment.

This check is target-aware and remains silent when loading a 64-bit build.

Bad

type counters struct {
    ready uint32
    total uint64 // may be misaligned on a 32-bit target
}

Good

type counters struct {
  total uint64
  ready uint32
}