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Register the assembly/library resolvers at early stage - #21361

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Dongbo Wang (daxian-dbw) merged 3 commits into
PowerShell:masterfrom
daxian-dbw:register
Mar 21, 2024
Merged

Dongbo Wang (daxian-dbw) merged 3 commits into
PowerShell:masterfrom
daxian-dbw:register

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@daxian-dbw Dongbo Wang (daxian-dbw) commented Mar 21, 2024 •

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PR Summary

Fix #20740, Fix #21319

This is an unexpected regression caused by #18356, specifically this line of change in ExternalScriptInfo.
The native lib resolver and GAC assembly resolvers are registered within the static constructor of ClrFacade, and that change reduced the reference surface of ClrFacade, which caused them to not be registered when running pwsh -exe bypass -nop -c "ipmo pki".

The fix is to do the registration to an early stage. PowerShellAssemblyLoadContext.InitializeSingleton(string.Empty) is added to the static constructor of RunspaceBase, which will run as soon as anything in the startup code path references LocalRunspace or RunspaceBase. This is to make sure we register the resolvers before PowerShell is ready to run any scripts/cmdlets.

However, we still need to keep the singleton initialization in ClrFacade because ClrFacade can be used without a Runspace created, for example, by calling the type conversion methods in LanguagePrimitive. So, we attempt to do the singleton initialization at both places.

Many thanks to Patrick Meinecke (@SeeminglyScience) for the help in investigation and validation.

PR Checklist

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This PR has 14 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!


Quantification details

Label      : Extra Small
Size       : +11 -3
Percentile : 5.6%

Total files changed: 3

Change summary by file extension:
.cs : +3 -3
.ps1 : +8 -0

Change counts above are quantified counts, based on the PullRequestQuantifier customizations.

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LGTM!

@SteveL-MSFT Steve Lee (SteveL-MSFT) left a comment

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LGTM

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can you think of a way to tickle this to validate the throw behavior?I'm not sure it can be done easily without a hosting scenario, but I wonder if we should. This isn't blocking or imperative for this PR, but I wonder if it would be useful.

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James Truher (@JamesWTruher) It's easy to validate the throw-on-reentry behavior. The method PowerShellAssemblyLoadContextInitializer.SetPowerShellAssemblyLoadContext is intended to be called by a native host, but it can be called from within PowerShell too:

image

@daxian-dbw
Dongbo Wang (daxian-dbw) merged commit ad7278b into PowerShell:master Mar 21, 2024
@daxian-dbw
Dongbo Wang (daxian-dbw) deleted the register branch March 21, 2024 23:25
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microsoft-github-policy-service Bot commented Mar 21, 2024 •

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📣 Hey Dongbo Wang (@daxian-dbw), how did we do? We would love to hear your feedback with the link below! 🗣️

🔗 https://aka.ms/PSRepoFeedback

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Issue importing PKI module when using pwsh -command 7.4.0 Linux native shared libraries in module not loaded using the RID directory

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