Attach

attach {pid}

Break if

break {breakpoint} if {condition}

Clear / Delete BreakPoint

clear
clear {func name}
clear {line number}
clear {binary:line number}
clear {binary:func name}
delete {breakpoint}

Disable BreakPoint

disable
disable {breakpoint}
disable display {display number}
disable mem {memory area}

Enable BreakPoint

enable
enable {breakpoint}
enable once {breakpoint}
enable delete {breakpoint}
enable display {display number}
enable mem {memory area}

Commands

execute command at breakpoint

commands {breakpoint}
{cmds} ...
end

Summary

break foo if x > 0
  commands
    silent
    printf "x is %d\n", x
    cont
  end