4.15. Using the textual debugger

If you are modifying the core of the programming environment or working without the environment you may need to use the textual debugger. After attaching the aborted process to the debugger using the shell command attach, these commands are available:

Command	Description
attach: n	attach the process with object reference number n
detach	detach the debugged process
step[:n]	execute (n) non trivial bytecodes *
stepi[:n]	execute (n) bytecodes
next[:n]	execute (n) non trivial bytecodes in the current activation
nexti[:n]	execute (n) bytecodes in the current activation
finish	finish executing the current activation
cont	continue execution
trace	print out a stack trace of the process
show	display the current activation
show: n	go to and display the nth activation on the stack
status	display the status of the debugged process
up[: n]	go up (n) activation(s)
upLex	go up to the lexical enclosing scope of this activation
down[: n]	go down (n) activation(s)
lookup: <name>	lookup the given name in the context of the current activation

* A bytecode is trivial if it is a push of a literal or a send to a slot residing in the lexical scope of the current activation.