- Programs rarely work correctly the first time. Finding bugs
is called debugging, and a program that helps you find bugs is a
gawk has a built-in debugger that works very
similarly to the GNU Debugger, GDB.
- Debuggers let you step through your program one statement at a time,
examine and change variable and array values, and do a number of other
things that let you understand what your program is actually doing (as
opposed to what it is supposed to do).
- Like most debuggers, the
gawk debugger works in terms of stack
frames, and lets you set both breakpoints (stop at a point in the code)
and watchpoints (stop when a data value changes).
- The debugger command set is fairly complete, providing control over
breakpoints, execution, viewing and changing data, working with the stack,
getting information, and other tasks.
- If the GNU Readline library is available when
compiled, it is used by the debugger to provide command-line history
- Usually, the debugger does not not affect the
program being debugged, but occasionally it can.