[cDAC] Move ARM64 Stackwalking to managed code #116717
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Pull Request Overview
This PR moves ARM64 stackwalking to managed code, updating the unwind logic in ARM64Context and introducing managed lookup tables for unwind codes.
- Calls to the native unwinding routine are replaced with an instance of ARM64Unwinder for improved managed integration.
- New lookup tables, UnwindCodeSizeTable and UnwindCodeInstructionCountTable, are added using modern C# 12 array initialization syntax.
Reviewed Changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Contracts/StackWalk/Context/ARM64Context.cs | Updated the Unwind method to use ARM64Unwinder and added a relevant using directive to support managed code logic. |
| src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Contracts/StackWalk/ARM64/LookupValues.cs | Introduced new lookup tables for unwind code sizes and instruction counts using modern C# 12 collection initialization syntax. |
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Tagging subscribers to this area: @steveisok, @dotnet/dotnet-diag |
This was referenced Jun 17, 2025
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am11
reviewed
Jun 18, 2025
...icrosoft.Diagnostics.DataContractReader.Contracts/Contracts/StackWalk/ARM64/ARM64Unwinder.cs
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am11
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Jun 20, 2025
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One nit, otherwise LGTM! 👍
cc @filipnavara managed stack unwinding! 💡
...t.Diagnostics.DataContractReader.Contracts/Contracts/StackWalk/Context/ARM64/LookupValues.cs
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davidwrighton
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Jun 20, 2025
This was referenced Jun 25, 2025
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Ports the ARM64 unwinder to managed code. The cDAC uses this managed version instead of deferring to the runtime native copy.
I'll remove the native linking in a follow-up PR.