SWI-Prolog -- debugging/0

Documentation
- Reference manual
  - Built-in Predicates
    - Debugging and Tracing Programs
      - trace/0
      - tracing/0
      - notrace/0
      - notrace/1
      - debug/0
      - nodebug/0
      - debugging/0
      - spy/1
      - nospy/1
      - nospyall/0
      - leash/1
      - visible/1
      - unknown/2
      - style_check/1
- Packages

Availability::- use_module(library(prolog_debug)).(can be autoloaded)

Source

Print debug status and spy points on current output stream. See also the Prolog flag debug.

Availability::- use_module(library(prolog_debug)).(can be autoloaded)

Source

[det]debugging

Report current status of the debugger.