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[Bug-cflow] pb with pointers and function address


From: THORE, Pascal
Subject: [Bug-cflow] pb with pointers and function address
Date: Tue, 11 Jul 2006 11:16:41 +0200


    Hi,

  I'm using gnucflow and i found a problem with pointers.
 

  Example1 :

        => with one function : function1

        void function1(void)
        {
         int *pt;


         pt = function1;
        }
 

        gnu cflow ouptut =>     function1() <void function1 (void) at 
essai.c:1> (R):
                                        function1() <void function1 (void) at 
essai.c:1> (recursive: see 1)

        There is no effective call to function1: fonction1's address is 
assigned to pointer pt.
        gnucflow can't see it's not a real call ?



        => with 2 functions : function1 and and unknow function 'function2' 
(just like any symbol)


                void function1(void)
                {
                 int *pt;


                 pt = function2;
                }


                gnu cflow ouptut =>     function1() <void function1 (void) at 
essai.c:1>:
  

                it's OK !


        => with function2's prototype :

                void function2(void);

                void function1(void)
                {
                 int *pt;
 

                 pt = function2;
                }

                gnu cflow ouptut =>     function1() <void function1 (void) at 
essai.c:3>:



                it's OK !


        => with function2's body :

                void function2(void)
                {
                 ;
                }

                void function1(void)
                {
                int *pt;


                 pt = function2;
                }


                gnu cflow ouptut =>     function1() <void function1 (void) at 
essai.c:6>:
                                                function2() <void function2 
(void) at essai.c:1>
        

                it's not OK !


    Best regards,

     Pascal THORE




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