Fucntion 69 - debugging.

A process can load other process as debugged by set of corresponding bit by call to subfunction 7 of function 70.
A process can have only one debugger; one process can debug some others. The system notifies debugger on events occuring with debugged process. Messages are written to the buffer defined by subfunction 0. Format of a message: Message codes: When debugger terminates, all debugged processes are killed. If debugger does not want this, it must previously detach by subfunction 3.
All subfunctions are applicable only to processes/threads started from the current by function 58 or 70 with set debugging flag.
Debugging of multithreaded programs is not supported yet.
The full list of subfunctions: