gprof for shared libraries.

[Chanaka Nanayakkara]

i'm using soalaris 9 and g++ compiler.


I'm trying to get gprof information about a shared library.

So I wrote a small library like this,



*comp.cpp*



#include<iostream>


#include<string>


#include"comp.h"


using namespace std;





void detailsG(int age, string str)


{


   cout << "lib 1 ******************" << endl;


   int a = age;


   string s = str;


   cout <<"your name is "<< s;


   cout <<" and your age is " << a << "."<< endl;


   sayHelloG();


   cout <<"comp.cpp  detailsG"<<endl;


   cout << "lib 1 ******************" << endl;


}


void sayHelloG()


{


   cout << "lib 1 ******************" << endl;


   cout << "Hello dear.." <<endl;


   cout << "comp.cpp  sayHelloG" << endl;


   cout << "lib 1 ******************" << endl;


}



*comp.h*



#include<string.h>


#include<string>


using namespace std;




extern "C" {


   void detailsG(int, string);


   void sayHelloG();


}




Then I build the library like this,



g++ -pg -fPIC -I. -c comp.cpp

g++ -shared -pg -o libmitTest.so comp.o



Then I wrote a little program which uses that library.



#include "comp.h"


#include <iostream>





using namespace std;



                          int main () {





cout << "IN MAIN" << endl;





    sayHelloG();


    detailsG(22, "Gavinda");





cout << "AGAIN IN MAIN" << endl;


return 0;


}




I compiled it like this,

g++ -pg -L /export/home/chanaka/first/lib -lmitTest z.cpp -o z.out

export LD_PROFILE=libmitTest.so:z.out



after I run z.out file I got gmon.out file but its gprof output don't show
details about shared library functions. But I want to get details about
shared library functions. Could anyone please tell me the way to get details
about shaed library functions.



gprof  -b z.out gmon.out   produced a output like this,



bash-2.05$ gprof -b z.out gmon.out



granularity: each sample hit covers 4 byte(s) no time propagated



                                 called/total       parents

index  %time    self descendents  called+self    name           index

                                 called/total       children



               0.00        0.00       1/1           _start [19]

[2]      0.0    0.00        0.00       1         main [2]

               0.00        0.00       2/2           <external> [1]



-----------------------------------------------



               0.00        0.00       1/2           _GLOBAL__I_main [10]

               0.00        0.00       1/2           _GLOBAL__D_main [9]

[8]      0.0    0.00        0.00       2
_Z41__static_initialization_and_destruction_0ii
[8]



-----------------------------------------------



               0.00        0.00       1/1           __do_global_dtors_aux
[13]

[9]      0.0    0.00        0.00       1         _GLOBAL__D_main [9]

               0.00        0.00       1/2
_Z41__static_initialization_and_destruction_0ii
[8]



-----------------------------------------------



               0.00        0.00       1/1           __do_global_ctors_aux
[12]

[10]     0.0    0.00        0.00       1         _GLOBAL__I_main [10]

               0.00        0.00       1/2
_Z41__static_initialization_and_destruction_0ii
[8]



-----------------------------------------------









granularity: each sample hit covers 4 byte(s) no time accumulated



  %  cumulative    self              self    total

time   seconds   seconds    calls  ms/call  ms/call name

 0.0       0.00     0.00        2     0.00     0.00
_Z41__static_initialization_and_destruction_0ii
[8]

 0.0       0.00     0.00        1     0.00     0.00  _GLOBAL__D_main [9]

 0.0       0.00     0.00        1     0.00     0.00  _GLOBAL__I_main [10]

 0.0       0.00     0.00        1     0.00     0.00  main [2]





Index by function name



  [9] _GLOBAL__D_main       [8] _Z41__static_initia

 [10] _GLOBAL__I_main       [2] main





Object modules



1: z.out

bash-2.05$



in this output the line *"0.00        0.00       2/2           <external>
[1]"* shows details about shared library functions. But I want to get
individual details about each shared library function. what did i do wrong
here? or what is the correct way to get details about shared libraries?



Thanks for spending your valuable time for me.