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package btf
// datasecResolveWorkaround ensures that certain vars in a Datasec are added
// to a Spec before the Datasec. This avoids a bug in kernel BTF validation.
//
// See https://lore.kernel.org/bpf/20230302123440.1193507-1-lmb@isovalent.com/
func datasecResolveWorkaround(b *Builder, ds *Datasec) error {
for _, vsi := range ds.Vars {
v, ok := vsi.Type.(*Var)
if !ok {
continue
}
switch v.Type.(type) {
case *Typedef, *Volatile, *Const, *Restrict, *TypeTag:
// NB: We must never call Add on a Datasec, otherwise we risk
// infinite recursion.
_, err := b.Add(v.Type)
if err != nil {
return err
}
}
}
return nil
}
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