On Sun, Nov 26, 2017 at 10:05 AM, Markus Trippelsdorf
<mar...@trippelsdorf.de> wrote:
> bootstrap-ubsan shows:
> gcc/hash-map.h:277:19: runtime error: member access within null pointer of
> type 'struct hash_map'
>
> Fix the issue by returning early.
> bootstrap-ubsan on X86_64 and ppc64le. Tested on ppc64le.
>
> OK for trunk?
Ok.
> gcc/
> * hash-map.h (gt_cleare_cache): Avoid UB.
>
> diff --git a/gcc/hash-map.h b/gcc/hash-map.h
> index 6b8365a9d0a6..e5630338491a 100644
> --- a/gcc/hash-map.h
> +++ b/gcc/hash-map.h
> @@ -274,6 +274,8 @@ template<typename K, typename V, typename H>
> static inline void
> gt_cleare_cache (hash_map<K, V, H> *h)
> {
> + if (!h)
> + return;
> gt_cleare_cache (&h->m_table);
> }
>
> --
> Markus
