[Rcpp-devel] (Very) rare segfault

[Kevin Ushey]

The general prescription is:

1. Try running the code with `gctortue(TRUE)` on,
2. Try running with a debugger (gdb, lldb, valgrind),
3. Try running with sanitizers (see e.g. Dirk's docker containers:
https://github.com/eddelbuettel/docker-ubuntu-r)

This should help provide you (and/or us) enough information to diagnose the
problem.

Cheers,
Kevin


On Wed, Aug 20, 2014 at 10:38 AM, Gregor Kastner <gregor.kastner at wu.ac.at>
wrote:

> Dear all,
>
> during a large simulation study on around 300 cores, I have just noticed
> "strange" behavior of my package depending on Rcpp. "Strange" in the sense
> that on very rare occasions (around 1 in 100000 function calls
> through .Call), a NumericMatrix object created at C level and returned back
> to R as part of a list isn't available there, causing a "memory not mapped"
> segfault when trying to access it from R. The issue is not
> deterministically
> reproducible and, as mentioned, very rare. This makes narrowing down the
> bug
> a pain. I do know however that this problem does not appear in Rcpp 0.10.5
> but does appear in Rcpp 0.11.0. Maybe there is anyone out there who has
> experienced something similar or otherwise has a hunch where I should dig
> further.
>
> Thanks a ton in advance,
> Gregor
> _______________________________________________
> Rcpp-devel mailing list
> Rcpp-devel at lists.r-forge.r-project.org
> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.r-forge.r-project.org/pipermail/rcpp-devel/attachments/20140820/8492694e/attachment.html>