Adding printf to the starting of all functions in a file

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181

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+5 Q:

Adding printf to the starting of all functions in a file

I have some very large C files, having lots of functions. I need to trace the execution path at run time. There is no way I can trace it through debugging as its a hypervisor code currently running over qemu and doing a lot of binary translations.

Can anyone point me to some script in Perl or Python which can add a printf at the starting of all functions and the text could be something like "I am in < function name >"?

+20 A:

Just pass -finstrument-functions to gcc when compiling. See the gcc(1) man page for details.

Ignacio Vazquez-Abrams 2010-06-20 08:54:39

Perfect answer to the spirit of the question.

Noufal Ibrahim 2010-06-20 09:12:13

@Ignacio +1. Just to add, then entry code might look like:printf("Function details: %s\n", ____PRETTY_FUNCTION____); ____PRETTY_FUNCTION____ is predefined macro that provides a string containing function name + signature.

Fanatic23 2010-06-20 10:52:03

+2 A:

Here is a nice example of what you want.

Yousf 2010-06-20 10:01:19