From: Tomas Pospisek's Mailing Lists <tpo2@...>
Date: 2007-05-25T04:44:53+09:00
Subject: Re: Ruby - Debugging

On Fri, 25 May 2007, How do I use the ruby default debugger? wrote:

> How do I use the ruby default debugger?

$ ruby -rdebug /tmp/some_ruby_program.rb
Debug.rb
Emacs support available.

/tmp/k.rb:1:puts "a"
(rdb:1) help
Debugger help v.-0.002b
Commands
   b[reak] [file:|class:]<line|method>
   b[reak] [class.]<line|method>
                              set breakpoint to some position
   wat[ch] <expression>       set watchpoint to some expression
   cat[ch] (<exception>|off)  set catchpoint to an exception
   b[reak]                    list breakpoints
   cat[ch]                    show catchpoint
   del[ete][ nnn]             delete some or all breakpoints
   disp[lay] <expression>     add expression into display expression list
   undisp[lay][ nnn]          delete one particular or all display expressions
   c[ont]                     run until program ends or hit breakpoint
   s[tep][ nnn]               step (into methods) one line or till line nnn
   n[ext][ nnn]               go over one line or till line nnn
   w[here]                    display frames
   f[rame]                    alias for where
   l[ist][ (-|nn-mm)]         list program, - lists backwards
                              nn-mm lists given lines
   up[ nn]                    move to higher frame
   down[ nn]                  move to lower frame
   fin[ish]                   return to outer frame
   tr[ace] (on|off)           set trace mode of current thread
   tr[ace] (on|off) all       set trace mode of all threads
   q[uit]                     exit from debugger
   v[ar] g[lobal]             show global variables
   v[ar] l[ocal]              show local variables
   v[ar] i[nstance] <object>  show instance variables of object
   v[ar] c[onst] <object>     show constants of object
   m[ethod] i[nstance] <obj>  show methods of object
   m[ethod] <class|module>    show instance methods of class or module
   th[read] l[ist]            list all threads
   th[read] c[ur[rent]]       show current thread
   th[read] [sw[itch]] <nnn>  switch thread context to nnn
   th[read] stop <nnn>        stop thread nnn
   th[read] resume <nnn>      resume thread nnn
   p expression               evaluate expression and print its value
   h[elp]                     print this help
   <everything else>          evaluate
(rdb:1)

--
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   Tomas Pospisek
   http://sourcepole.com -  Linux & Open Source Solutions
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