Supporting additional WASM runtime

[hardiksd]

Hi, I'm new here but exploring using crun on baremetal linux embedded system. Going through the build files I figure WASM is supported experimentally and few WASM runtime options are available.

I wanted to know what would be good place to look into adding one more wasm runtime. I'm specifically interested in adding WAMR and hoping it can be added as one additional option for WASM - https://github.com/bytecodealliance/wasm-micro-runtime

any pointers would be helpful.

[giuseppe]

we can add other runtimes, you can take a look at the existing ones for an idea of how it should be done.

The support for a specific handler must be specified at configure time ./configure so that it is not added by default.

Are you interested in working on it?

[flouthoc]

@hardiksd Have you looked at wasmtime (crun already has integration for wasmtime) ? or does wasmtime has higher footprint than wasm-micro-runtime ?

[hardiksd]

we can add other runtimes, you can take a look at the existing ones for an idea of how it should be done.

The support for a specific handler must be specified at configure time ./configure so that it is not added by default.

Are you interested in working on it?

Thanks. Yes, I can work and enable WAMR runtime. It has much smaller footprint compared to wasmtime. I went through old commit's to see how this can be done. So I should be able to work on it.

Thanks for the pointers.

[macko99]

@hardiksd do you have any progress with the work on adding wamr support?

[macko99]

Hello, I have created a PR with a preview of WAMR runtime implementation. It does work! It is not yet fully developed and needs some polishing but the WASM containers are executing.

The env vars are being passed and you can see the container logs. The memory footprint is much much lower than the one of Wasmedge. Simple wait containers use about 54% less memory due to the WAMR library being super lightweight!

It seems very promising!