expose run_wasm host function to wasm

[pannous]

There is an interesting suggestion for WASI to add an
API to instantiate a module from wasm bytes: WebAssembly/WASI#477

Since wasmer is often ahead of the curve, would you consider exposing a private experimental function
run_wasm(buffer, length) which allows for modules to dynamically run (tiny) other modules, within the same security context?

Use cases would be plugins for wasm programs, compilers running inside wasm etc…

The c function header might look like this:

__attribute__((import_module("wasi_private"), import_name("run_wasm")))  
extern long run_wasm(uint8* buffer, size_t buffer_length)

[ptitSeb]

@theduke would this be part of WASIX?

[theduke]

WASIX already supports spawning threads and even processes.

Allowing to spawn with just a raw Wasm module is the logical next step.
We definitely want that in WASIX.

Of course if it makes it into WASI we will also want to add support there.

[pannous]

Thanks, we will use https://docs.rs/wasix/latest/wasix/fn.proc_spawn.html as intermediate solution!

{ saving binary and then call proc_spawn("wasmer",0,"funclet.wasm" … ) or something. }

[theduke]

Note that this will not work with a .wasm file at the moment!

That is something that needs to be implemented.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

Feel free to reopen the issue if it has been closed by mistake.