pub fn config_wire_fingerprint() -> StringExpand description
detcore_model::config::config_wire_fingerprint, extended with the
revision of Detcore’s global RPC (crate::tool_global::GLOBAL_RPC_REVISION).
A runtime that embeds Detcore (SaBRe’s plugin, the LiteInst runtime that
in-guest-trap also loads, DBT’s) sends GlobalRequests to its coordinator
as positional bincode and decodes the GlobalResponses. Both enums live
in this crate, outside the sources the configuration’s fingerprint hashes,
so a variant one build had and the other lacked went unnoticed: a newer
runtime’s request failed to decode in the middle of a run, and an older
runtime never sent it (and so, for one, kept the host’s inotify rename
cookies). Every such runtime compares this fingerprint with its
coordinator’s before it decodes anything, so the pair is refused by name.
The revision stands for the enums’ source, which, unlike the
configuration’s, is not embedded: these runtimes are loaded into the guest,
where every byte they grow by moves the guest’s own mappings.