schlather at math.uni-goettingen.de
2009-Jan-27 15:20 UTC
[Rd] uninitialised value in R (PR#13476)
Hi,
I get an "Conditional jump or move depends on uninitialised value(s)"
from valgrind when using 'solve' in combination with some simple
C-code. (I did not use other functions of R besides 'solve'.)
In detail: running
R --vanilla -d "valgrind --tool=memcheck --memcheck:leak-check=yes
--num-callers=20 "
and calling
.Call("XXX")
nd <- 3
solve(diag(nd) , as.vector(1:nd))
.Call("XXX")
gives the above valgrind message for the second call of "XXX".
Without "solve" in the middle, there is no message
from valgrind.
Best regards,
Martin
/////////////////////////////// C source file u.cc
#include "u.h"
SEXP XXX() {
SEXP ans;
PROTECT (ans = allocVector(INTSXP, 1));
INTEGER(ans)[0] = 1;
UNPROTECT(1);
return ans;
}
/////////////////////////////// header file u.h
#ifndef RFsimu_public_H
#define RFsimu_public_H 1
#include <R.h>
#include <Rinternals.h>
#include <Rmath.h>
#include <Rdefines.h>
extern "C" SEXP XXX();
#endif /* RF_simu_PUBLIC_H*/
--please do not edit the information below--
Version:
platform = i686-pc-linux-gnu
arch = i686
os = linux-gnu
system = i686, linux-gnu
status = Under development (unstable)
major = 2
minor = 9.0
year = 2009
month = 01
day = 13
svn rev = 47573
language = R
version.string = R version 2.9.0 Under development (unstable)
(2009-01-13 r47573)
Locale:
LC_CTYPE=en_GB.UTF-8;LC_NUMERIC=C;LC_TIME=en_GB.UTF-8;LC_COLLATE=en_GB.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_GB.UTF-8;LC_PAPER=en_GB.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_GB.UTF-8;LC_IDENTIFICATION=C
Search Path:
.GlobalEnv, package:stats, package:graphics, package:grDevices,
package:utils, package:datasets, package:methods, Autoloads, package:base
--
Prof. Dr. Martin Schlather
Institut f?r Mathematische Stochastik & Zentrum f?r Statistik
Georg-August-Universit?t G?ttingen
Goldschmidtstr. 7, 5.111
D -- 37077 G?ttingen
schlather at math.uni-goettingen.de
http://www.stochastik.math.uni-goettingen.de/~schlather
http://zfs.uni-goettingen.de/
phone: +49 (0)551 39 17 2131 fax : +49 (0)551 39 13 505
Hi Martin, I wasn't able to compile your files. Replacing "extern "C" SEXP XXX();" by "SEXP XXX();" solve the issue and I got no message from valgrind - I'm not sure this is what you really want to do though. I hope this might help. Cheers, Mathieu schlather at math.uni-goettingen.de a ?crit :> Hi, > > I get an "Conditional jump or move depends on uninitialised value(s)" > from valgrind when using 'solve' in combination with some simple > C-code. (I did not use other functions of R besides 'solve'.) > > In detail: running > > R --vanilla -d "valgrind --tool=memcheck --memcheck:leak-check=yes > --num-callers=20 " > > and calling > > .Call("XXX") > nd <- 3 > solve(diag(nd) , as.vector(1:nd)) > .Call("XXX") > > gives the above valgrind message for the second call of "XXX". > Without "solve" in the middle, there is no message > from valgrind. > > Best regards, > Martin > > > /////////////////////////////// C source file u.cc > #include "u.h" > > SEXP XXX() { > SEXP ans; > PROTECT (ans = allocVector(INTSXP, 1)); > INTEGER(ans)[0] = 1; > UNPROTECT(1); > return ans; > } > > > /////////////////////////////// header file u.h > #ifndef RFsimu_public_H > #define RFsimu_public_H 1 > > #include <R.h> > #include <Rinternals.h> > #include <Rmath.h> > #include <Rdefines.h> > > extern "C" SEXP XXX(); > > > #endif /* RF_simu_PUBLIC_H*/ > > > > > > > --please do not edit the information below-- > > Version: > platform = i686-pc-linux-gnu > arch = i686 > os = linux-gnu > system = i686, linux-gnu > status = Under development (unstable) > major = 2 > minor = 9.0 > year = 2009 > month = 01 > day = 13 > svn rev = 47573 > language = R > version.string = R version 2.9.0 Under development (unstable) > (2009-01-13 r47573) > > Locale: > LC_CTYPE=en_GB.UTF-8;LC_NUMERIC=C;LC_TIME=en_GB.UTF-8;LC_COLLATE=en_GB.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_GB.UTF-8;LC_PAPER=en_GB.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_GB.UTF-8;LC_IDENTIFICATION=C > > Search Path: > .GlobalEnv, package:stats, package:graphics, package:grDevices, > package:utils, package:datasets, package:methods, Autoloads, package:base > >-- Institute of Mathematics Ecole Polytechnique F?d?rale de Lausanne STAT-IMA-FSB-EPFL, Station 8 CH-1015 Lausanne Switzerland http://stat.epfl.ch/ Tel: + 41 (0)21 693 7907