Function dr_get_client_path 

pub unsafe extern "C" fn dr_get_client_path(
    client_id: client_id_t,
) -> *const c_char

Returns the client library name and path that were originally specified to load the library. If the resulting string is longer than #MAXIMUM_PATH it will be truncated. \p client_id is the client ID passed to a client’s dr_client_main() function.