[Rd] Crash in R using embedded.

From: Dave Pugmire <dpugmire_at_gmail.com>
Date: Wed, 01 Feb 2012 10:24:23 -0500


Hi,
I'm new to R, and am trying to embed R into another application. I'm calling gev.fit() from the ismev package, and it is crashing somewhere inside it.
gdb is not catching it, and valgrind is not showing any memory corruption issues.
I suspect it's memory corruption, because it doesn't crash in exactly the same spot each time.
I'm running R 2.12.2 on a 64 bit linux (Ubuntu 10.04)

Also, before I make the gev.fit() call, I save out the R state using "save.image(....)", then load the image file into a standalone R on the console, and call gev.fit(), and it works fine. So, it's something to do with my app, and the R.

I'm looking for hints/ideas/tricks/etc for debugging this. I'm starting to put print statements into the R code, and into the C code in R (src/main/optim.c), but it hasn't shown me the source of the problem.

Thanks!

Here is the code I'm using to initialize:

putenv("R_HOME=/apps/R/install/lib64/R"); const char *R_argv[]= {"RInterfaceTest", "--gui=none", "--no-save", "--no-readline", "--silent"};
Rf_initialize_R(sizeof(R_argv)/sizeof(R_argv[0]), const_cast<char
**>(R_argv));

setup_Rmainloop();

ParseStatus status;
SEXP cmdSexp, cmdexpr = R_NilValue;
int error;
string rcommand = "f<-file(paste(tempdir(), \"/Routput.txt\", sep = \"\"), open=\"wt+\")\nsink(f)\n";

PROTECT(cmdSexp = allocVector(STRSXP, 1)); SET_STRING_ELT(cmdSexp, 0, mkChar(rcommand.c_str()));

cmdexpr = PROTECT(R_ParseVector(cmdSexp, -1, &status, R_NilValue)); for(int i = 0; i < length(cmdexpr); i++) {

     R_tryEval(VECTOR_ELT(cmdexpr, i),NULL,&error);  }
 UNPROTECT(2);         [[alternative HTML version deleted]]



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