[Rcpp-devel] Rcpp Module Errors

[Andrew Redd]

Jonas,
Thank you.  This exactly solved the problem.  I'm not sure if this
`Module('yada','test')$bla()` causing a segmentation fault or not is a bug
or user error.  I'll leave that for Dirk and Romain to figure out.  For now
I'll chalk it up to a user error.  Thanks for figuring this out.

-Andrew

On Tue, Jun 21, 2011 at 10:37 PM, Jonas Rauch <jonas.rauch at googlemail.com>wrote:

> I had the same problem before I realized that when a Module is loaded as
> part of a package (instead of manually loading the shared lib) you don't
> need the whole
> > Module('yada','test')$ ...
> just try
> >bla()
>
> The exposed classes and functions are automatically made available in the
> namespace of the package
>
> > library(test)
> Loading required package: Rcpp
> > test::
> test::bar               test::bla2              test::rcpp_hello_world
> test::bla               test::foo               test::World
> test::bla1              test::hello
>
> Regards,
> Jonas
>
>
>
>
> On Wed, Jun 22, 2011 at 12:51 AM, Andrew Redd <amredd at gmail.com> wrote:
>
>> I apologize if this has been covered.  I've looked and see a couple of
>> post relating to this issue, but I'm not sure if it was ever solved. The
>> example modules appear to not work, at least for me.  On a related note I
>> can't get my modules to run either, but If I can figure out how to run the
>> examples I think I can get mine running.
>>
>> R> sessionInfo()
>> R version 2.13.0 (2011-04-13)
>> Platform: x86_64-pc-linux-gnu (64-bit)
>>
>> locale:
>>  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
>>  [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
>>  [5] LC_MONETARY=C              LC_MESSAGES=en_US.UTF-8
>>  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
>>  [9] LC_ADDRESS=C               LC_TELEPHONE=C
>> [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
>>
>> attached base packages:
>> [1] stats     graphics  grDevices utils     datasets  methods   base
>>
>> other attached packages:
>> [1] Rcpp_0.9.4
>>
>> To install the package skeleton:
>> $ r -lRcpp -e"Rcpp.package.skeleton(\"test\",module=T)"
>> Attaching package: 'utils'
>>
>> The following object(s) are masked from 'package:Rcpp':
>>
>>     .DollarNames, prompt
>>
>> Creating directories ...
>> Creating DESCRIPTION ...
>> Creating NAMESPACE ...
>> Creating Read-and-delete-me ...
>> Saving functions and data ...
>> Making help files ...
>> Done.
>> Further steps are described in './test/Read-and-delete-me'.
>>
>> Adding Rcpp settings
>>  >> added RcppModules: yada
>>  >> added Depends: Rcpp
>>  >> added LinkingTo: Rcpp
>>  >> added useDynLib directive to NAMESPACE
>>  >> added Makevars file with Rcpp settings
>>  >> added Makevars.win file with Rcpp settings
>>  >> added example header file using Rcpp classes
>>  >> added example src file using Rcpp classes
>>  >> added example R file calling the C++ example
>>  >> added Rd file for rcpp_hello_world
>>  >> copied the example module
>>
>> build
>> $ R CMD build test
>> <<output omitted>>
>>
>> and check with an error.
>> $R CMD check test_1.0.tar.gz
>> <<output omitted>>
>> * checking whether the name space can be loaded with stated dependencies
>> ... WARNING
>> Error: .onLoad failed in loadNamespace() for 'test', details:
>>   call: value[[3L]](cond)
>>   error: failed to load module yada from package test
>> Execution halted
>>
>> <<output omitted>>
>>
>> According to Dirk's June 15th post on the issue I include require("methods",
>> character=TRUE, quietly=TRUE) in the .onLoad function, now checks ok but
>> when trying things out I get a segmentation fault.
>> $ R -q --vanilla
>> R> library(test)
>> Loading required package: Rcpp
>> R> Module('yada','test')$bla()
>>
>>  *** caught segfault ***
>> address 0x90, cause 'memory not mapped'
>>
>> Traceback:
>>  1: .Call(symbol)
>>  2: Module(module, mustStart = TRUE)
>>  3: .getModulePointer(x)
>>  4: Module("yada", "test")$bla
>>
>> Possible actions:
>> 1: abort (with core dump, if enabled)
>> 2: normal R exit
>> 3: exit R without saving workspace
>> 4: exit R saving workspace
>> Selection:
>>
>> So questions are:
>>     1) is anyone else getting this error?
>>     2) does anyone know how to fix it?
>>
>> Thanks,
>> Andrew
>>
>>
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>>
>>
>
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