DWARF support

[Artem Pelenitsyn]

Thanks everyone! A blog post would be awesome, indeed.

Ben, I didn't have anything particular in mind, just curious about possibly
more ergonomic alternatives to profiling builds for getting this sort of
information. (Motivation similar to Richard's, I think.)

On Fri, Nov 19, 2021, 1:57 AM Sven Tennie <sven.tennie at gmail.com> wrote:

> Am Fr., 19. Nov. 2021 um 01:09 Uhr schrieb Ben Gamari <
> ben at smart-cactus.org>:
>
>> 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.
>>
>
> Hey Ben, Hey Artem, Hey all,
>
> Thanks for bringing this up! I'll add some documentation to the user's
> guide and will likely write a blog post covering the "material" from notes
> in a more approachable way.
>
> Two details to note regarding the IPE based backtrace mechanism:
>
> - It's based on return frames on the STG stack. So, it doesn't work for
> trivial programs. A return frame is produced when the scrutinee of a case
> expression is evaluated.
> The test [1] shows a working example.
>
> - To get backtraces containing references in libraries, those have to be
> compiled with `-finfo-table-map`, too.
>
> Now that I've got the attention of many GHC-Devs: A big Thank-You! goes to
> Ben and Matthew that were always reachable and always very helpful during
> the whole development process of this feature!
>
> Best regards,
>
> Sven
>
> [1] -
> https://gitlab.haskell.org/ghc/ghc/-/blob/aed98ddaf72cc38fb570d8415cac5de9d8888818/testsuite/tests/rts/decodeMyStack.hs
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/ghc-devs/attachments/20211119/b3b92d8d/attachment.html>