Problems with gcov

["Andrew Wall" <andrew dot j dot wall at ntlworld dot com>]

Hi,
I've asked on the comp.os.msdos.djgpp newsgroup about gcov and been refered
to you.
I'm using gpp/gcov from djgpp versions 3.4.1 on Windows XP.

I have written 'testctor.cpp' and 'testctor.bat' which produces the output
'testctor.cpp.gcov':
testctor.cpp: which is a small test program which has a static instance of a
class with both a constructor and a destructor.
===============
// Test constructors/destructors:
#include <iostream>
using namespace std;
class Test {
public:
	Test(void){
	cout<< "In Test ctor" << endl;
	}
	~Test(void){
	cout<< "In Test dtor" << endl;
	}
}T1;

void uncalled(void){
	cout<< "In uncalled" << endl;
}
int main(void){
// Test T2;
cout<< "In main" << endl;
return 0;
}
===============

Testctor.bat:
===============
gpp -o testctor.exe testctor.cpp -fprofile-arcs -ftest-coverage -lgcov
testctor.exe
gcov testctor.cpp
===============
which shows how I compiled the above source file, ran the resulting program
and ran gcov to produce a .gcov output.

testctor.cpp.gcov
===============
        -:    0:Source:testctor.cpp
        -:    0:Graph:testctor.gcno
        -:    0:Data:testctor.gcda
        -:    0:Runs:1
        -:    0:Programs:1
        -:    1:// Test constructors/destructors:
        -:    2:#include <iostream>
        -:    3:using namespace std;
        -:    4:class Test {
        -:    5:public:
function _ZN4TestC1Ev called 1 returned 100% blocks executed 100%
        1:    6:	Test(void){
        1:    7:	cout<< "In Test ctor" << endl;
        -:    8:	}
function _ZN4TestD1Ev called 0 returned 0% blocks executed 0%
    #####:    9:	~Test(void){
    #####:   10:	cout<< "In Test dtor" << endl;
        -:   11:	}
        1:   12:}T1;
        -:   13:
function _Z8uncalledv called 0 returned 0% blocks executed 0%
    #####:   14:void uncalled(void){
    #####:   15:	cout<< "In uncalled" << endl;
        -:   16:}
function main called 1 returned 100% blocks executed 100%
        1:   17:int main(void){
        -:   18:// Test T2;
        1:   19:cout<< "In main" << endl;
        1:   20:return 0;
function _Z41__static_initialization_and_destruction_0ii called 1 returned
100% blocks executed 76%
        2:   21:}
function _GLOBAL__I_T1 called 1 returned 100% blocks executed 100%
        2:   22:/*EOF*/
function _GLOBAL__D_T1 called 0 returned 0% blocks executed 0%
    #####:   23:/*EOF*/
===============
The problem I can see is that while gcov correcty reports that the function
'void uncalled(void)' is in fact not called, it incorrectly reports that the
destructor ~Test(void) is not called.
The run of the program demonstrates that the destructor _is_ called.

Can you give me any help with this?

Andrew Wall

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