[release/11.0] Deduplicate "all managed object wrappers" mapping - #133291
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Tagging subscribers to this area: @dotnet/interop-contrib |
This was referenced Sep 5, 2026
AaronRobinsonMSFT
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Sep 8, 2026
JulieLeeMSFT
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Approved. Customer reported and regression.
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@jkoritzinsky, please check test failures. |
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/ba-g SSL test failures are unrelated (no SSL logic uses any COM logic). |
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Backport of #133260 to release/11.0
/cc @jkoritzinsky
Customer Impact
Ever increasing managed memory usage (memory leak) each time a managed object is passed to COM via ComWrappers, even when reusing the same COM instance. The only workaround is to turn off the "managed debugging" helper APIs.
Regression
Regressed in #113907
Testing
Local validation via SOS (the only direct exposure of the adjusted API)
Risk
Low, only affects an API exposed to SOS (no other consumers use it). As mentioned in the PR on main, the expected number of elements in the collection when deduplicated is 1 or 2 at most, so not using a hash-table is fine for the scenario (in particular the user-reported issue will have 1 item in the collection after the fix).
IMPORTANT: If this backport is for a servicing release, please verify that:
release/X.0-staging, notrelease/X.0.release/X.0(no-stagingsuffix).Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.
Keep in mind that we still need package authoring in .NET 8 and older versions.