[release/8.0-staging] Add runtime config parameter to force ijwhost to load assemblies in an isolated context#105436
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elinor-fung merged 2 commits intodotnet:release/8.0-stagingfrom Jul 29, 2024
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…n isolated context (dotnet#105337) * Add support for isolated load context in LoadInMemoryAssemblyInContext by passing -1 as loadContext * Have ijwhost check a runtime config parameter to determine if it should run in an isolated load context * Added test for ijwhost isolated load context runtime config option
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AaronRobinsonMSFT
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Jul 24, 2024
jeffschwMSFT
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lgtm. we will take for consideration in 8.0.x
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Backport of #105337 to release/8.0-staging
cc @mikeoliphant @AaronRobinsonMSFT
Customer Impact
Issue: #104480
When trying to load a second copy of a C++/CLI assembly that has already been loaded from a different location, the runtime ends up in an infinite loop calling into the
ijwhoststub for starting the runtime/loading the managed assembly. There is no workaround.Regression
We made a change to make C++/CLI assemblies always load in the default ALC - this was based on common user feedback / pain points and made the behaviour better match .NET Framework (that migration being the major use case). However, this ends up breaking the reported scenario where multiple copies of a C++/CLI assembly (same assembly name in metadata) are loaded from different locations.
Testing
Customer validated (and implemented). Automated tests added.
Risk
Low. This adds a configuration option the change the load behaviour. It does not change the default behaviour.