Hi John,
Le 13/02/2025 à 15:17, John Clarke a écrit :
Hey folks,
I've been developing an Rcpp package on my Mac and testing on Mac and
Windows. I also have been testing on linux-latest with the standard
Github action which runs the CMD check. These passed without any problem
until I implemented a test suite (testthat) and increased the test
coverage to include additional calls. It turns out that the two main
functions (and maybe others) that I wrote cause a segfault on Ubuntu
builds. Several versions on Linux are tested and all fail.
It appears to be related to Rcpp so I'm wondering if you've encountered
this before and how I might go about finding a solution. I can reproduce
the error on a local docker image consistently, but... I don't have the
debugging tools I"m used to on MacOS via VS Code to help me step through
when the error occurs. And I suspect it has to do with a mismatched
library version because the tests pass fine on Windows and MacOS. So not
sure if debugging would help much.
Is there a known configuration/compiling issue/fix that I could try?
You can see some techniques e.g. here
https://github.com/wch/r-debug/blob/master/debugging-r.md
In short, if you already have a docker image, you can compile you code
there with "-g -O0" options and run it in:
R -d gdb
(gdb) run
<run your R/Rcpp (test)code. An error will bring you back to gdb where
you can check relevant frames, parameters, cals and so on.>
Hoping it helps,
Best,
Serguei.
Apart from installing a full fledged instance of Ubuntu with VS Code and
debugger, is there a way I can get closer to finding out what the issue is?
Clip from the failed R error messages when I call
shg$runSimFromFixedValues(N, 0, 0, 1940):
*** caught segfault ***
address (nil), cause 'memory not mapped'
Traceback:
1: .External(list(name = "CppMethod__invoke_notvoid", address =
<pointer: 0x55efab6ef710>, dll = list(name = "Rcpp", path = "/usr/
local/lib/R/site-library/Rcpp/libs/Rcpp.so", dynamicLookup =
TRUE, handle = <pointer: 0x55efa9b64b30>, info = <pointer:
0x55efaa89aaa0>, forceSymbols = FALSE), numParameters = -1L),
<pointer: 0x55efae9ae1f0>, <pointer: 0x55efaf2399d0>, .pointer, ...)
2: shg$runSimFromFixedValues(N, 0, 0, 1940)
Thanks,
-John
John Clarke | Senior Technical Advisor |
Cornerstone Systems Northwest | john.cla...@cornerstonenw.com
<mailto:john.cla...@cornerstonenw.com>
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