Initial SslStream stress app work

[eiriktsarpalis]

Adds the changes initially created for the corefx repo in dotnet/corefx#42560

Adds a console application for stress testing the SslStream class. The work somewhat imitates the setup that we already have in the http stress app: the app will open a fixed number of concurrent connections and run the stress scenaria for a fixed time period per connection (defaults at 2 minutes).

Unlike http2 there are no multiplexing concerns here, so the potential for stress tests seems less interesting. I've only included a single scenario for the moment: sending and echoing back of random data with basic integrity checks, using randomized permutations of Write, WriteAsync, WriteByte and Flush methods. I haven't been able to reproduce failures so far, though I haven't run the app for extensive periods of time yet.

[eiriktsarpalis]

NB I can't request reviews from https://github.com/orgs/dotnet/teams/ncl yet, so I'm adding some of you manually. cc @maryamariyan

[davidsh]

Adds the changes initially created for the corefx repo in dotnet/corefx#42560

Does this PR incorporate the existing feedback/changes from the corefx repo PR which was already reviewed?

[davidsh]

/azp run corefx-outerloop

[azure-pipelines]

No pipelines are associated with this pull request.

[davidsh]

/azp list

[azure-pipelines]

CI/CD Pipelines for this repository:

• runtime-installer
• runtime-libraries
• runtime-coreclr
• runtime-coreclr outerloop
• runtime-coreclr crossgen2
• runtime-libraries outerloop
• runtime-libraries outerloop-windows
• runtime-libraries outerloop-linux
• runtime-libraries outerloop-osx

[davidsh]

/azp runtime-libraries outerloop

[azure-pipelines]

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[davidsh]

/azp run runtime-libraries outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[eiriktsarpalis]

Does this PR incorporate the existing feedback/changes from the corefx repo PR which was already reviewed?

Mostly yes, with the only outstanding issue being this one. I've been thinking about this, and my conclusion is that I'd prefer it if we didn't reference other test code, at least not until we're not validating the stress projects in CI. Moving forward I would like to consolidate the stress projects into a single solution which are built as part of CI. @stephentoub thoughts?

[eiriktsarpalis]

/azp run runtime-libraries outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[jkotas]

FYI: We are discouraging creating PR branches in the dotnet/runtime repo. Could you please create the branch in your fork next time?

https://github.com/dotnet/consolidation/blob/master/Documentation/issues-pr-management.md#what-will-be-dotnetruntimes-branch-policy

[eiriktsarpalis]

@jkotas The branches have been pushed to the main repo deliberately, as it's the only way I can debug the stress pipelines with the changes. I will make sure they are cleaned up as soon as the PRs are merged.

[eiriktsarpalis]

/azp list

[azure-pipelines]

CI/CD Pipelines for this repository:

• stress-http-linux
• runtime-installer
• runtime-libraries
• runtime-coreclr
• runtime-coreclr outerloop
• runtime-coreclr crossgen2
• runtime-libraries outerloop
• runtime-libraries outerloop-windows
• runtime-libraries outerloop-linux
• runtime-libraries outerloop-osx

[eiriktsarpalis]

/azp list

[azure-pipelines]

CI/CD Pipelines for this repository:

• coreclr-gc-longrunning
• runtime-libraries stress-http-windows
• runtime-libraries stress-http-linux
• runtime-installer
• runtime-libraries
• runtime-coreclr
• runtime-coreclr outerloop
• runtime-coreclr crossgen2
• runtime-libraries outerloop
• runtime-libraries outerloop-windows
• runtime-libraries outerloop-linux
• runtime-libraries outerloop-osx

[eiriktsarpalis]

/azp run runtime-libraries stress-http-windows

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[eiriktsarpalis]

Closing and re-creating as the publication of the repo has caused issues in my personal fork.

[eiriktsarpalis]

Replaced by #290