Dwarf-Based Stack Walking Using eBPF

• go-profiler-notes

  14 3,481 1.5 Jupyter Notebook

  felixge's notes on the various go profiling methods that are available.

  

Thanks!

As @brancz mentioned, Delve uses DWARF unwind information to produce backtraces (they are stored in the .debug_frame section for Go).

You are right, Go enabled frame pointers for all architectures as of 1.17 [0]. This is enabled to allow profilers to work well, without having to use to techniques such as the one we describe in our post.

When it gets funny is that there's `gopclntab`, a 3rd option in Go to unwind stacks, used by `panic` and I believe other parts of the runtime. If you are interested in more details, Felix Geisendörfer's repo contains way more details [1]

[0]: https://go.dev/doc/go1.17

[1]: https://github.com/DataDog/go-profiler-notes/blob/main/stack...

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