As with the native runtime, we now catch all native panics when we
execute the wasm runtime. The panics inside the wasm runtime were
already catched before by the wasm executor automatically, but any panic
in the host functions could bring down the node. The recent switch to
execute the native counterpart of the host function in `sr-io`, makes
this change required. The native `sr-io` functions just `panic` when
something is not provided or any other error occured.
* Adds new wrapper traits for wasm executor
* Add new crate `substrate-wasm-interface`
Thew new crate holds types and traits for the communicating between the
wasm runtime and the host.
* Rewrite externals with new macro etc
* Fix vec initialization
* Make executor tests working
* Remove unused code + warnings
* Introduce `Pointer` and `WordSize` for working with wasm
* Fix tests and compilation
* Fix compilation
* Apply suggestions from code review
Co-Authored-By: Sergei Pepyakin <sergei@parity.io>
* Review feedback
* Remove unused conversions
* Make each host function its own struct
`HostFunctions` now just returns these function structs. Each function
can be executed by using one of the function structs. The inherent host
functions are now moved to the "normal" host functions.
* Remove byteorder
* Add floating point types
* Make pointer interface more safe
* Add type alias for wasm-interface Result
* More review comments
Bastian Köcher