These are hooks and utility functions for a little command-line debugger that can be used to analyze your bytecode while it is running.
To activate it, set your LEOContext's PreInstructionProc to LEODebuggerPreInstructionProc.
Set a breakpoint on the given instruction. This will cause execution to be interrupted and a debugger console to be shown that allows examining the current stack.
Use this function as the PreInstructionProc of your LEOContext to activate the debugger.
Remove a breakpoint set using LEODebuggerAddBreakpoint().