gccglibcbuffer-overflowgcc-warningfortify-source

how to debug "*** buffer overflow detected ***: program_name terminated" along with _FORTIFY_SOURCE=2

My program crashes with the message "*** buffer overflow detected ***: program_name terminated", and I suspect it may be related to the compiler option "_FORTIFY_SOURCE=2" that I use (source: difference between gcc -D_FORTIFY_SOURCE=1 and -D_FORTIFY_SOURCE=2).

In general, how to find the program point that generates such error?

Solution

  • In general, how to find the program point that generates such error?

    For this particular error, running the program under debugger will immediately tell you where the error happened.

    I can try it, my feeling is that ...

    You should try it and your feeling is wrong.

    P.S. Building your program with -fsanitize=address (if your compilation and runtime environment supports it) and running it may produce a more informative error message.