How to make gdb step-into operation in standard library C/C++ function?

Question

Recently I have faced an interesting problem. When I use gdb for code search, I can move inside any function which I defined, by step-into. But when I try to do it for standard C function (e.g printf() ) I see only binary form of source code.

How can I ask gdb to show human-readable source code? I am very interested in the work of standard functions.Thank you!

Depending on your system you need either to link the against debug-library or link against a library with debug symbols. — user6556709, Apr 03 '19 at 10:33
What is your OS? Installing libc debug symbols should be enough for what you want. — ks1322, Apr 03 '19 at 10:51
Since you're using Ubuntu, you likely already have debuginfo installed, but not the C library's source code. See https://stackoverflow.com/questions/48278881/gdb-complaining-about-missing-raise-c/48287761#48287761 for how to install that. — Mark Plotnick, Apr 04 '19 at 02:31

score 4 · Answer 1 · answered Apr 03 '19 at 10:37

4

You have to:

Install the debug versions of the standard C and C++ libraries
Tell the compiler to link against those versions

If you are on Linux and have GCC as your compiler, you can look up this post about how to do the second bullet above.

answered Apr 03 '19 at 10:37

P.W

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How to make gdb step-into operation in standard library C/C++ function?

1 Answers1