Fix ComWrappers interaction with the IReferenceTracker interface #45624
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Convert Managed Object Wrapper (MOW) GC Handle from HNDTYPE_STRONG
to HNDTYPE_REFCOUNTED.
Add new CreateObjectFlags value to indicate aggregation during
CreateObject scenario. This isn't reflected in the managed
.NET 5 API surface area.
In the ReferenceTracker scenario the ref count may never reach 0 so
the MOW destructor needs to handle that case. The previous expectation
for a null in the destructor was based on the STRONG handle logic.
During aggregation scenarios involving ReferenceTracker, ownership
of the inner is now the responsibility of the runtime.
AaronRobinsonMSFT
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jkoritzinsky
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Dec 7, 2020
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// Auto-generated message 69e114c which was merged 12/7 removed the intermediate src/coreclr/src/ folder. This PR needs to be updated as it touches files in that directory which causes conflicts. To update your commits you can use this bash script: https://gist.github.com/ViktorHofer/6d24f62abdcddb518b4966ead5ef3783. Feel free to use the comment section of the gist to improve the script for others. |
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Issues: microsoft/CsWinRT#413, microsoft/microsoft-ui-xaml#3719
A fundamental flaw was discovered during consumption of the
ComWrappersAPI (introduced .NET 5) in WinUI 3.0 scenarios. This was related to COM Aggregation and how C#/WinRT generated interop code.Additional E2E testing has been added in this PR. The scenario was also manually validated on a local build against the official XAML/Jupiter runtime using hand crafted interop code. A private build of coreclr was then shared with the C#/WinRT team for validation.
.NET 5 servicing: #45622
API Follow-ups: #44446
/cc @davidwrighton @elinor-fung @jkoritzinsky