GHC Weekly News - 10/24/2014

Luite Stegeman stegeman at
Tue Oct 28 21:14:10 UTC 2014

>  - For the GHC 7.10 release, one of the major features we planned to
> try and merge was DWARF debugging information. This is actually a
> small component of larger ongoing work, including adding stack traces
> to Haskell executables. While, unfortunately, not all the work can be
> merged, we talked with Peter, and made a plan: our hope is to get
> Phab:D169 merged, which lays all the groundwork, followed by DWARF
> debugging information in the code generators. This will allow tools
> like `gdb` or other extensible debuggers to analyze C-- IR accurately
> for compiled executables.
>  Peter has written up a wiki page, available at SourceNotes,
> describing the design. We hope to land all the core infrastructure in
> Phab:D169 soon, followed by DWARF information for the Native Code
> Generator, all for 7.10.1

I'm currently working on some internal changes in GHCJS to prepare for GHC
7.10, support source maps [1] and make the optimizer more effective and
reliable (smaller/faster code!). So this change, retaining more source code
location information, would still be very useful, even if you don't manage
to land the whole NCG/Cmm part (GHCJS only uses STG).


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