build: wasip1 is broken on wasmer runtime

[johanbrandhorst]

This is a tracking issue for issues surrounding the use of the new wasip1 GOOS target on the wasmer Wasm runtime. We currently do not have a wasmer runner, but manual testing against the wasmer runtime has already yielded some results, namely, it is known that it exhibits a problem similar to wasmtime when it comes to opening directories (see #59583 (comment)).

This issue should not be considered done until we have a working wasmer runner and all tests are either passing or we have documented the failures which we cannot reasonably fix.

Currently known failing tests:

Package	Test name	Error	Test log	Fixed
archive/tar	TestReader	open testdata/gnu.tar: Bad file number	Full log

[gopherbot]

Change https://go.dev/cl/493755 mentions this issue: all: add wasmer wasip1 runner

[gopherbot]

Change https://go.dev/cl/493775 mentions this issue: misc/wasm: add wasmer to wasip1 script

[johanbrandhorst]

The runner has been added and once the builders have been redeployed I will run a test run to see what errors we hit.

[gopherbot]

Change https://go.dev/cl/495077 mentions this issue: misc/wasm: test commit

[johanbrandhorst]

The first runner test result against the wasmer runtime is in, and it seems that it's refusing to do any file opens, instead erroring with Bad file number on practically all attempts. More investigation will be necessary. I have updated the table at the top.

[jakebailey]

I'm sure you are aware of this, but if you're looking to just check the current status of the runners, the build dashboard does contain links to the most recent builds per commit (wasip1 is all the way on the right), and should be a more convenient way to look up the current failures than CLs like CL 495077 that need the trybots run. That's how I've been watching things, at least.

[johanbrandhorst]

Haha, I didn't actually know that it'd run our broken runners against tip, thanks! I'm still using the CLs to add extra debugging in some cases (like CL 491855) so I'll probably keep them around for myself anyway :).

[gopherbot]

Change https://go.dev/cl/498616 mentions this issue: misc/wasm: set PATH variable in exec