run	Start debugged program.
break	Set breakpoint at specified location.
next	Step program, proceeding through subroutine calls.
list	List specified function or line.
print	Print value of expression EXP.
up	Select and print stack frame that called this one.
down	Select and print stack frame called by this one.
display	Print value of expression EXP each time the program stops.
undisplay	Cancel some expressions to be displayed when program stops.
backtrace	Print backtrace of all stack frames, or innermost COUNT frames.
step	Step program until it reaches a different source line.
continue	Continue program being debugged, after signal or breakpoint.
finish	Execute until selected stack frame returns.
watch	Set a watchpoint for an expression.
info breakpoints	Status of specified breakpoints (all user-settable breakpoints if no argument).
delete breakpoints	Delete all or some breakpoints or auto-display expressions.
whatis	Print data type of expression EXP.
target record-full	Log program while executing and replay execution from log.
reverse-next	Step program backward, proceeding through subroutine calls.
set var	Evaluate expression EXP and assign result to variable VAR.