Search code examples
cmacrosgdb

How to debug a macro in GDB?

I am debugging a huge C source code, and it has many macro definition. currently there is a segmentation fault is occurring at a macro. I want to be able to debug macro, step in macro definition just like as a function. I tried that

./configure debugflags="-gdwarf-2 -g3"
make

but this is not working, make is failing. Without above option it compile correctly, but could not debug macro.

How can I debug macro?

Solution

  • You could convert the macro into a static inline function, e.g. from 

    #define max(a, b) (a) > (b) ? (a) : (b)

    to 

    static inline max(int a, int b)
{
    return a > b ? a : b;
}

    This lets the compiler create debugging information for the macro (now function).