Pass `args` to `run` instead of storing it in a field. This avoids the
need to clone it within `run`.
Also, change `args` from `Vec<String>` to `&[String]`, avoiding the need
for some vecs and clones.
Add functions to retrieve function definitions and static items from
all crates (local and external).
For external crates, add a query to retrieve the number of defs in a
foreign crate.
