Finding the execution location of a instruction

iftiuk · 04-06-2004, 04:59 PM

Suppose I have a file myfile.c and in it at line 70 I have a printf statement and another at line 50 and another at somewhere else may be in a different file. Now whenever these printf are executed is there any way to know from which file and from what line these were issued? Did I make sense?

Mara · 04-06-2004, 05:08 PM

Moved: This thread is more suitable in Programming and has been moved accordingly to help your thread/question get the exposure it deserves.

It is possible to know it. But how would you like to use it? If you'd like to write a different code for a different place it was executed from it's not easy, but for debigging purposes it's very easy (in gdb there's 'bt' option that shows you a trace of functions run before the current one).

deiussum · 04-06-2004, 09:15 PM

You might also be looking for the predefined macros __FILE__ and __LINE__.

For instance:

Code:

#include <stdio.h>

int main()
{

    printf("%s %i\n", __FILE__, __LINE__);
    return 0;
}

iftiuk · 04-07-2004, 07:54 AM

Thank you. I did not realize we had these macros in C.