Function alloc_self_profile_query_strings_inner 

fn alloc_self_profile_query_strings_inner<'tcx, C>(
    tcx: TyCtxt<'tcx>,
    query: &'tcx QueryVTable<'tcx, C>,
    string_cache: &mut QueryKeyStringCache,
)
where
    C: QueryCache,
    C::Key: Debug + Clone,

Allocate the self-profiling query strings for a single query cache. This method is called from alloc_self_profile_query_strings which knows all the queries via macro magic.