These commands move to a new stack frame and print the name of the
function and the values of its arguments in the style of a Lisp
function call:
— Debugger Command: up
Move up to the next higher frame. More recent function calls are
considered to be higher on the stack.
— Debugger Command: down
Move down to the next lower frame.
— Debugger Command: top
Move to the highest frame, that is, the frame where the debugger was
entered.
— Debugger Command: bottom
Move to the lowest frame.
— Debugger Command: frame [n]
Move to the frame with the specified number. Prompts for the number if not
supplied. The frame with number 0 is the frame where the debugger
was entered.