Open up more test for Miri

[tiif]

In the latest rustc nightly rustc 1.82.0-nightly (a7399ba69 2024-08-31), tokio API that requires epoll_wait can now run successfully in Miri. For reference, the tests that passed and were added to the Miri test suite can be found here: rust-lang/miri#3848. Is there any interest in opening up more tests to be run with Miri in tokio's CI?

[Darksonn]

Absolutely. Currently we only run tests inside src/ with miri, but if we can start to run tests/ too, that'd be great, as the majority of our tests are located there.

[tiif]

Thanks! :)

I'd like to work on this so I'd know sooner if anything ICE'd miri, or what syscall should be supported next. But I have never contributed to tokio yet, so I might request for more guidance along the way.

[Darksonn]

You're definitely welcome to reach out to me on zulip or discord for that.

[tiif]

I found an ICE rust-lang/miri#3858 on miri side, so the test that ICE'd might be skipped until the fix landed on nightly, or this change should only be approved after all fixes are landed on nightly.

[Darksonn]

It's of course nice to enable as many tests as possible, but I suspect going from zero to all tests would be difficult, so I am okay with PRs that enable miri only on some of the tests.