a2466b3c23
This commit moves the shared signature registry out of `Store` and into `Engine`. This helps eliminate work that was performed whenever a `Module` was instantiated into a `Store`. Now a `Module` is registered with the shared signature registry upon creation, storing the mapping from the module's signature index space to the shared index space. This also refactors the "frame info" registry into a general purpose "module registry" that is used to look up trap information, signature information, and (soon) stack map information.
This is the wasmtime-runtime crate, which contains wasm runtime library
support, supporting the wasm ABI used by wasmtime-environ,
wasmtime-jit, and wasmtime-obj.
This crate does not make a host vs. target distinction; it is meant to be compiled for the target.
Most users will want to use the main wasmtime crate instead of using this
crate directly.