gcov coverage on template classes

[NW <new at sgenomics dot org>]

Hi,

I'm trying to calculate the coverage of some template classes using
gcov. However those methods which are not used, are marked as
non-executable in the gcov output. I assume this is because gcc is not
generating code for these methods.

The following example:

#include <vector>
#include <iostream>

using namespace std;

template<class _t>
class ReadIntensity {
public:
  enum Base_Type {
   base_a,base_c,base_g,base_t,base_invalid
  };

  ReadIntensity() : bases(base_count) {
  }

  /// No bounds checking!
  double getbase(_t position) const {
    return bases[position];
  }

  /// No bounds checking!
  void setbase(_t position,double value) {
    bases[position] = value;
  }

  const static int base_count = 4;
  vector<double> bases;
};

int main() {
  ReadIntensity<size_t> r;

  r.setbase(ReadIntensity<size_t>::base_a, 5.5);
  r.setbase(ReadIntensity<size_t>::base_t, 5.6);
  r.setbase(ReadIntensity<size_t>::base_g, 5.7);
  r.setbase(ReadIntensity<size_t>::base_c, 5.8);
}

compiled with:

g++ simple.cpp -coverage -fkeep-inline-functions -fno-default-inline -O0 -lgcov -o simple

generates the following output:

        -:    0:Source:simple.cpp
        -:    0:Graph:simple.gcno
        -:    0:Data:simple.gcda
        -:    0:Runs:1
        -:    0:Programs:1
        -:    1:#include <vector>
        -:    2:#include <iostream>
        -:    3:
        -:    4:using namespace std;
        -:    5:
        -:    6:template<class _t>
        1:    7:class ReadIntensity {
        -:    8:public:
        -:    9:  enum Base_Type {
        -:   10:   base_a,base_c,base_g,base_t,base_invalid
        -:   11:  };
        -:   12:
        1:   13:  ReadIntensity() : bases(base_count) {
        -:   14:  }
        -:   15:
        -:   16:  /// No bounds checking!
        -:   17:  double getbase(_t position) const {
        -:   18:    return bases[position];
        -:   19:  }
        -:   20:
        -:   21:  /// No bounds checking!
        4:   22:  void setbase(_t position,double value) {
        4:   23:    bases[position] = value;
        -:   24:  }
        -:   25:
        -:   26:  const static int base_count = 4;
        -:   27:  vector<double> bases;
        -:   28:};
        -:   29:
        1:   30:int main() {
        1:   31:  ReadIntensity<size_t> r;
        -:   32:
        1:   33:  r.setbase(ReadIntensity<size_t>::base_a, 5.5);
        1:   34:  r.setbase(ReadIntensity<size_t>::base_t, 5.6);
        1:   35:  r.setbase(ReadIntensity<size_t>::base_g, 5.7);
        1:   36:  r.setbase(ReadIntensity<size_t>::base_c, 5.8);
        -:   37:
        2:   38:}
        1:   39:/*EOF*/

Which shows getbase marked as non-executable.

Is there any way round this?

gcov version:

gcov (GCC) 4.2.3 (Ubuntu 4.2.3-2ubuntu7)