There are many packages around that use .C and .Call interfaces with
really huge objects and still are pretty stable. The error is most
likely in your own C code and it most likely to be connected to memory
allocation/deallocation or array indexing, but without having the code
here no one will be able to help further.
Oleg
Sole Acha, Xavi wrote:
> Dear R listers,
>
>
>
> I have developed a C function to be executed from R through the ".C"
> interface. After doing dyn.load, the function executes properly and I get the
> results. However, after executing my function, R seems to get unstable and
> crashes (giving a segmentation fault and exiting) whenever I try to do
> ANYTHING with a relatively large object (creating a new one or even just
> writing the name of an existing one).
>
>
>
> I use R 2.4.0 under a Linux machine with 1 GB RAM. Below there is an example
> of execution, so you can get an idea of what is happening:
>
>
>
> --------------------
>
> dyn.load("my_C_module.so");
>
> res <- .C("my_C_function",.....); #The function executes fine and res is ok
>
> dyn.unload("my_C_module.so") #I know this isn't strictly necessary
>
>
>
> #Here R is still running, but when I execute:
>
>
>
> m <- matrix(0,1000,100); #I try to create a new object and R crashes
>
>
>
> *** caught segfault ***
>
> address 0x10, cause 'memory not mapped'
>
>
>
> Traceback:
>
> 1: matrix(0, 1000, 100)
>
>
>
> Possible actions:
>
> 1: abort (with core dump)
>
> 2: normal R exit
>
> 3: exit R without saving workspace
>
> 4: exit R saving workspace
>
> --------------------
>
>
>
> Although I tell R to abort and give me the core dump, it doesn't succeed in
> doing so.
>
>
>
> I would be grateful if anyone could tell me what could be the problem with my
> C function that makes R behave this way?
>
>
>
> Thank you very much in advance, and apologies for this long email.
>
>
>
> Xavier Solé.
>
>
>
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> ------------------------------------------------------------------------
>
> ______________________________________________
> R-devel@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
--
Dr Oleg Sklyar * EBI/EMBL, Cambridge CB10 1SD, England * +44-1223-494466
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