[R-pkg-devel] Tracking down cause of UBSAN error

[James Lamb]

To add to Dirk's summary of the available options, you might find it useful
to borrow from the setup that we use to replicate CRAN's UBSAN checks on
GitHub Actions for {lightgbm}.

https://github.com/microsoft/LightGBM/blob/0c1c36cdbdf771a03c9ae0873eb28585e6c3d624/.github/workflows/r_package.yml#L162-L186

I was able to reproduce all of the specific issues in {lightgbm} that
showed up on CRAN's UBSAN checks with this setup, which uses the
rhub/rocker-gcc-san image. It should be easy enough to switch that to the
images from https://github.com/wch/r-debug if necessary.

Hope that it helps!

-James

On Thu, Oct 15, 2020 at 9:08 PM Dirk Eddelbuettel <edd using debian.org> wrote:

>
> Hugh,
>
> The different SAN/ASAB/UBSAN/... analysers depend critically on _exactly
> how_
> the instrumentation is setup.  That make the whole setup analysis a little
> brittle, and it is a real shame that neither CRAN nor some of the entities
> supposedly here in order to support R users and developers have managed to
> produced _standardized_ environments (using, say, Docker) to make this
> genuinely reproducible. So we all waste time chasing things over and over.
>
> Five or so years ago I wrote a first container for this; I believe the RHub
> one is a descendant of it. But I found reproducing errors so tricky that I
> set up an entire package just to provide 'true positives' for such tests of
> the testing framework:   http://cloud.r-project.org/package=sanitizers
> It helps validate that the setup (container, say) catches what it is
> supposed
> to catch--as this is (too) easy to get wrong.
>
> These days I think the contains within the (very well done and complete)
> "collection" of containers maintained by Winston might be your best bet:
>   https://github.com/wch/r-debug
> This is what I used last time I needed something like it.
>
> Hth, Dirk
>
> --
> https://dirk.eddelbuettel.com | @eddelbuettel | edd using debian.org
>
> ______________________________________________
> R-package-devel using r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-package-devel
>


-- 
James Lamb
GitHub <https://github.com/jameslamb> | Twitter
<https://twitter.com/_jameslamb> | LinkedIn
<https://www.linkedin.com/in/jameslamb1/>

	[[alternative HTML version deleted]]