What is a breakpoint?

[andreu at robot3.cps.unizar.es (Jorge Andreu García)]

Hello:

I am trying to check a program made by another colleague and I have
founded this code:

    procedure breakpoint;
   pragma import(C, breakpoint, "breakpoint");

      procedure Stack_check_Dump_usage;
   pragma import(C, Stack_check_Dump_usage, "Stack_check_Dump_usage");

I know they are C functions imported to ADA, but I do not know what the
C-functions do. Any of you know it or know where can I search
information.

Thanks:

JORGE