topo_hdl_vasprintf
extern int topo_hdl_vasprintf(topo_hdl_t *, char **, const char *,
ret = topo_hdl_vasprintf(thp, str, fmt, ap);
return (topo_hdl_vasprintf(mod->tm_hdl, str, fmt, ap));
ret = topo_hdl_vasprintf(mod->tm_hdl, str, fmt, ap);