| debugging/0 | Report current status of the debugger. |
| exception_hook/4 | Trap exceptions and consider whether or not to start the tracer. |
| nospy/1 | Set/clear spy-points. |
| nospyall/0 | Set/clear spy-points. |
| notrap/1 | Install a trap on error(Formal, Context) exceptions that unify. |
| spy/1 | Set/clear spy-points. |
| trap/1 | Install a trap on error(Formal, Context) exceptions that unify. |