MADV_DONTDUMP
# ifdef MADV_DONTDUMP
SC_ALLOW_ARG(__NR_madvise, 2, MADV_DONTDUMP),
#if defined(MADV_DONTDUMP) && !defined(MAP_CONCEAL) && !defined(MAP_NOCORE)
(void)madvise(prekey, len, MADV_DONTDUMP);
if (madvise(sh.arena, sh.arena_size, MADV_DONTDUMP) < 0)
#if defined(MADV_DONTDUMP)