Ruby Debugger Primer

A disabled item is not forgotten, but has no effect until reenabled.
Use the “enable” command to have it take effect again.
–
List of disable subcommands:
–
disable breakpoints – Disable some breakpoints
disable display – Disable some display expressions when program stops

With no argument, edits file containing most recent line listed.
Editing targets can also be specified in this:
FILE:LINENUM, to edit at that line in that file,

A negative number indicates position from the other end. So
‘frame -1’ moves to the oldest frame, and ‘frame 0’ moves to
the newest frame.

Without an argument, the command prints the current stack
frame. Since the current position is redisplayed, it may trigger a
resyncronization if there is a front end also watching over
things.

If a thread number is given then we set the context for evaluating
expressions to that frame of that thread.

NOTE – to turn on autolist, use ‘set autolist’

Use the ‘source’ command in another debug session to restore them.

–
List of set subcommands:
–
set annotate – Set annotation level
set args – Set argument list to give program being debugged when it is started
set autoeval – Evaluate every unrecognized command
set autolist – Execute ‘list’ command on every breakpoint
set autoirb – Invoke IRB on every stop
set autoreload – Reload source code when changed
set basename – Report file basename only showing file names
set callstyle – Set how you want call parameters displayed
set debuggertesting – Used when testing the debugger
set forcestep – Make sure ‘next/step’ commands always move to a new line
set fullpath – Display full file names in frames
set history – Generic command for setting command history parameters
set keep-frame-bindings – Save frame binding on each call
set linetrace+ – Set line execution tracing to show different lines
set linetrace – Set line execution tracing
set listsize – Set number of source lines to list by default
set trace – Display stack trace when ‘eval’ raises exception
set width – Number of characters the debugger thinks are in a line

–
List of show subcommands:
–
show annotate – Show annotation level
show args – Show argument list to give program being debugged when it is started
show autoeval – Show if unrecognized command are evaluated
show autolist – Show if ‘list’ commands is run on breakpoints
show autoirb – Show if IRB is invoked on debugger stops
show autoreload – Show if source code is reloaded when changed
show basename – Show if basename used in reporting files
show callstyle – Show paramater style used showing call frames
show commands – Show the history of commands you typed
show forcestep – Show if sure ‘next/step’ forces move to a new line
show fullpath – Show if full file names are displayed in frames
show history – Generic command for showing command history parameters
show keep-frame-bindings – Save frame binding on each call
show linetrace – Show line execution tracing
show linetrace+ – Show if consecutive lines should be different are shown in tracing
show listsize – Show number of source lines to list by default
show port – Show server port
show post-mortem – Show whether we go into post-mortem debugging on an uncaught exception
show trace – Show if a stack trace is displayed when ‘eval’ raises exception
show version – Show what version of the debugger this is
show width – Show the number of characters the debugger thinks are in a line

th[read] stop stop thread nnn

th[read] resume resume thread nnn

th[read] [sw[itch]] switch thread context to nnn

th[read] [cur[rent]]show current thread

v[ar] c[onst]