DWARF support

[Ben Gamari]

Artem Pelenitsyn <a.pelenitsyn at gmail.com> writes:

> Another question would be where do I read about Haskell-native stack
> unwinder. The issue and MR Ben referenced have descriptions, but the MR
> didn't touch anything inside `docs` which is a bit scary. Are there any
> good recourses to dive into it besides the source code in the MR?
>
Indeed the user's guide documentation surrounding info table provenance
should be updated to note this new capability.

There is a long Note in compiler/GHC/Driver/GenerateCgIPEStub.hs which
describes the implementation. As far as the interface is concerned, it's
quite straightforward:

* One can call GHC.Stack.CloneStack.cloneMyStack, which returns a
  "frozen" copy of the calling context's stack
* One can then call GHC.Stack.CloneStack.decode to decode the stack into
  a list of frames.

Did you have any particular questions?

Cheers,

- Ben

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