Arm64 support for dotnet profiler

[edgarkz]

Hello,

It appears that the .NET profiler does not currently support the arm64 architecture:

[2025-01-08 16:05:52.138 | info | PId: 1 | TId: 1] .NET Profiler is explicitly enabled. [2025-01-08 16:05:52.138 | warning | PId: 1 | TId: 1] Profiler is deactivated because it runs on an unsupported architecture.

The relevant code can be found here:
https://github.com/DataDog/dd-trace-dotnet/blob/dc6b7c186cfee88e4c73f530e5e934ceb57d2918/profiler/src/ProfilerEngine/Datadog.Profiler.Native/DllMain.cpp#L142

Additionally, there’s a 2-year-old issue in the Datadog repository tracking this limitation:
DataDog/dd-trace-dotnet#3063

Could we please update the documentation to clearly indicate the current state of support and make it more visible that only the amd64 architecture is supported at this time?

Thank you!

[Lymah123]

Hi, can an external contributor work on this issue? If yes, I'd like to give it a try.

[korniltsev]

@Lymah123
The docs contributions are welcome and appreciated.
The arm64 support contributions should probably (depending on amount and types of changes) happen in datadog upstream repo. I suggest you reach datadog's issue before you intend to work on this.