How to use ghc-heap-view of ghc-8.6

Takenobu Tani takenobu.hs at gmail.com
Sat Jul 7 05:34:20 UTC 2018


Hi Patrick, thanks.
I'll start digging from your great resource.

I'll try using ghc-heap-view on GHCi.
Interactive usage is also useful.

Thank you for your kind explanation,
Takenobu





2018-07-07 13:05 GMT+09:00 Patrick Dougherty <patrick.doc at ameritech.net>:

> Hello,
>
> This effort mostly just brought the core of this [1] library into GHC. The
> main function you will want to try is `getClosureData`,
> which takes any value and returns the heap representation. There are some
> tricky aspects about evaluation, but I will refer you to the comments about
> `Box`s in [1].
>
> As a shameless self-plug, I also wrote a bit about it. The first page is a
> brief intro to the heap, and the second is an example demonstrating how to
> track down a leaky accumulator. I also link to a few posts that sent me
> down this path.
>
> This doesn't implement all of the functionality of [1], but it pulls in
> enough that hopefully it should be a little more stable between GHC
> versions. Also, you should be able to recreate many of the functions by
> looking at the source of [1] on hackage.
>
> [1] http://hackage.haskell.org/package/ghc-heap-view-0.5.10/
> docs/GHC-HeapView.html
> [2] https://patrickdoc.github.io/heap-view.html
>
> Best,
> Patrick
>
> P.S. Sorry about using [1] so many times. Both libraries are called
> heap-view which makes it a little difficult to distinguish.
>
> On Friday, July 6, 2018 10:10 PM, Takenobu Tani <takenobu.hs at gmail.com>
> wrote:
>
>
> Dear devs,
>
> I'm interested in ghc-heap-view of ghc-8.6. [1]
> Is there a document on how to use the ghc-heap-view of ghc-8.6?
>
> [1]: https://ghc.haskell.org/trac/ghc/wiki/Status/GHC-8.6.1#
> Landedinmasterbranch
>
> Regards,
> Takenobu
>
>
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