feat(dotnet): add native AOT example

[maxbrunet]

Continuing with my enthusiasm for traditionally jitted languages moving to native compilation for better integration with containers

This a new feature added in .NET 7: https://learn.microsoft.com/en-us/dotnet/core/deploying/native-aot/

[maxbrunet]

Similarly to GraalVM (#17), symbolication does not currently work:

Debug info are not stripped by default on Linux: https://learn.microsoft.com/en-us/dotnet/core/deploying/native-aot/#native-debug-information

The feature is all new and the documentation around it appears light and I do not know my around the .NET documentation well enough. I am unable to confirm if the frame/stack pointer is preserved and if there is a build flag for it. DWARF unwinding does not help either.

[brancz]

The docs page does say

Limited diagnostic support (debugging and profiling).

To me this looks like there are just no debuginfos in this binary to symbolize. What does nm <binary> output?

At first sight I would say either framepointers are there or dwarf unwinding is working, as the memory addresses look roughly like they could be correct and have a stack depth higher than one. (not an explanation for Maxime or the rest of the maintainers, but anyone who may be reading who's unfamiliar: if the unwinding is broken in some way we typically see a very very high memory address and maximum 1-2 stack depth)

[maxbrunet]

nm output: https://gist.github.com/maxbrunet/207417f6fe17f037e8c684e6876b16fe

For anyone who wants to reproduce:

make -C dotnet build-aot
docker create --name dotnet-aot-example parca-demo:dotnet-aot
docker cp dotnet-aot-example:/bin/demo .
docker rm dotnet-aot-example
nm demo