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Cannot step into a Tail Call #110441

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thaystg opened this issue Dec 5, 2024 · 1 comment · Fixed by #110334
Closed

Cannot step into a Tail Call #110441

thaystg opened this issue Dec 5, 2024 · 1 comment · Fixed by #110334
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@thaystg
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area-Diagnostics-coreclr in-pr There is an active PR which will close this issue when it is merged
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8.0.x

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@thaystg
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thaystg commented Dec 5, 2024

Description

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 and it behaves like a resume.

Reproduction Steps

Get this code:
https://github.com/dotnet/runtime/blob/e99557baffbe864d624cc1c95c9cbf2eefae684f/src/tests/JIT/Regression/JitBlue/Runtime_39581/Runtime_39581.il
Add a breakpoint on line 94 and try to step into.

Expected behavior

Pause on line 60.

Actual behavior

Resume.

Regression?

It worked before .NET 6.

Known Workarounds

Remove the tailcall usage.

Configuration

.NET 8.

Other information

No response
@dotnet-issue-labeler dotnet-issue-labeler bot added the needs-area-label An area label is needed to ensure this gets routed to the appropriate area owners label Dec 5, 2024
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This was referenced Dec 5, 2024
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@dotnet-policy-service dotnet-policy-service bot added the in-pr There is an active PR which will close this issue when it is merged label Dec 5, 2024
@tommcdon tommcdon added area-Diagnostics-coreclr and removed needs-area-label An area label is needed to ensure this gets routed to the appropriate area owners untriaged New issue has not been triaged by the area owner labels Dec 5, 2024
@tommcdon tommcdon added this to the 8.0.x milestone Dec 5, 2024
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area-Diagnostics-coreclr in-pr There is an active PR which will close this issue when it is merged
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[debugger] Support step into a tail call dotnet/runtime
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@thaystg @tommcdon