load msquic early to avoid interference with RemoteExecutor

[wfurt]

When msquic is loaded it will also initialize lttng. That calls wait and it can reap processes from RemoteExecutor and that will cause Assert in Process code. (long story and evidence is in #74795)

While the problem really lives in lttng there is no quick fix for that. To void the problem this change tries to load MsQuic early via static variable and that will initialize lttng before any tests actually start.

I wrote GetIsQuicSupported so we can do more there if needed. e.g. call some msquic API to load everything permanently. It is not needed at this point so I left it out.

I had test runs over nigh and I did not see any problems on system where it was failing before.
fixes #74795

[ghost]

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Issue Details

---

When msquic is loaded it will also initialize lttng. That calls wait and it can reap processes from RemoteExecutor and that will cause Assert in Process code. (long story and evidence is in #74795)

While the problem really lives in lttng there is no quick fix for that. To void the problem this change tries to load MsQuic early via static variable and that will initialize lttng before any tests actually start.

I wrote GetIsQuicSupported so we can do more there if needed. e.g. call some msquic API to load everything permanently. It is not needed at this point so I left it out.

I had test runs over nigh and I did not see any problems on system where it was failing before.
fixes #74795

Author:	wfurt
Assignees:	wfurt
Labels:	test-enhancement, area-System.Net.Quic
Milestone:	-

[jkotas]

Could you please re-enable disabled tests?

runtime/src/libraries/System.Net.Requests/tests/AssemblyInfo.cs

Line 8 in 360a6e0

[assembly: ActiveIssue("https://github.com/dotnet/runtime/issues/74795", typeof(PlatformDetection), nameof(PlatformDetection.IsMonoLinuxArm64))]

[jkotas]

LGTM otherwise

[wfurt]

Run tests in loop since yesterday and still looks good. macOS test failures are unrelated.

[wfurt]

/backport to release/7.0

[github-actions]

Started backporting to release/7.0: https://github.com/dotnet/runtime/actions/runs/3039384318