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GNU Emacs has two debuggers, debug and edebug. The first is
built into the internals of Emacs and is always with you; the second
requires that you instrument a function before you can use it.
Both debuggers are described extensively in Debugging Lisp Programs in The GNU Emacs Lisp Reference Manual. In this chapter, I will walk through a short example of each.
| • debug | How to use the built-in debugger. | |
| • debug-on-entry | Start debugging when you call a function. | |
| • debug-on-quit | Start debugging when you quit with C-g. | |
| • edebug | How to use Edebug, a source level debugger. | |
| • Debugging Exercises |