A Quick GDB Tour

• GDB is the Gnu Debugger.
• A debugger allows you to inspect variables while code is executing.
• It is a standard tool.
• To use
  • Code must be compiled with a -g flag. (we do)
• run with gdb progname
• several commands
  • Break (b) - set a breakpoint
    • break line-number
    • break file:line-number
    • break function
    • break file:function
  • start - begin executing code
    • starti - starts, but breaks at first executable line.
  • continue (c) - run until next break point.
  • step (s) - execute until next source code line
  • next (n) - execute next source code line in this function.
  • Printing (p)
    • print varname
    • print * pointer
    • print pointer->field
  • list (l) - list code
    • list
    • list lineno
    • list function-name
  • quit
  • bt - back-trace
    • Shows where you are in a function call.
    • print pointer->field
• There are multiple GUI interfaces
  • Code::blocks
  • DDD
    •