[release/8.0-staging] [debugger] Support step into a tail call#110440
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thaystg merged 1 commit intoDec 10, 2024
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Addressing Tom's and Mikelle's comments Removing unrelated change and adding enum Changing the comment.
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lgtm. we will take for consideration in 8.0.x
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Backport of #110334 to release/8.0-staging
/cc @thaystg
Customer Impact
#110441
A customer ships a compiler that uses tail calls and when their customers are debugging the app generated by this compiler and try to step into a tail call it behaves like a resume.
Regression
It works before .NET 6.
Testing
We manually tested using this internal test https://github.com/dotnet/runtime/blob/e99557baffbe864d624cc1c95c9cbf2eefae684f/src/tests/JIT/Regression/JitBlue/Runtime_39581/Runtime_39581.il and trying to step into the Callee.
Risk
Low risk, this will only affect the scenarios where we emit a tail call using the StoreTailCallArgs, which is not used a lot. As far as I understood it's impossible to generate it from a C# code, only F# and IL.