Question

I have something analogous to the following code snippets:

// file alpha.c
void function_A()
{
    int i;
    #include "code.h"
}

and

//file beta.c
void function_B()
{
    int i;
    #include "code.h"
}

and

// file code.h
for(i = 1;i < 10;i++)
{
    // do some stuff
    if (very_rare_event)
    {
        // do something else
    }
}

Yes, I am fully aware that its breaking all sorts of coding practices, but that’s another story (its all part of a very large, very complex, very old system and its not going to be changed any time soon).

My question is this: Is it possible to set a breakpoint within code.h at the “// do something else” point, in a way that you can specify whether it is the instance of being included from alpha.c or beta.c? And if so, how?

Answer 1

Put #defines in the main files:

// file alpha.c
#define BREAK_FOR_ME 'A'
void function_A()
{
    int i;
    #include "code.h"
}

// file beta.c
#define BREAK_FOR_ME 'B'
void function_B()
{
    int i;
    #include "code.h"
}

Then in code.h:

// file code.h
for(i = 1;i < 10;i++)
{
    // do some stuff
    if (very_rare_event)
    {

    #ifdef BREAK_FOR_ME
        switch (BREAK_FOR_ME)
        {
        case 'A':
            // set breakpoint here...
            break;

        case 'B':
            // or here...
            break;
        }
    #endif

        // do something else
    }
}