Class: Debugger::TraceCommand

Inherits:
Command
  • Object
show all
Defined in:
lib/ruby-debug/commands/trace.rb

Overview

:nodoc:

Constant Summary

Constants inherited from Command

Command::DEF_OPTIONS

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Command

commands, #find, inherited, #initialize, load_commands, #match, method_missing, options, register_setting_get, register_setting_set, register_setting_var, settings, settings_map

Constructor Details

This class inherits a constructor from Debugger::Command

Class Method Details

.help(cmd) ⇒ Object 



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# File 'lib/ruby-debug/commands/trace.rb', line 48

def help(cmd)
  %{
    tr[ace] (on|off)\tset trace mode of current thread
    tr[ace] (on|off) all\tset trace mode of all threads
    tr[ace] var(iable) VARNAME [stop|nostop]\tset trace variable on VARNAME
  }
end

.help_command ⇒ Object 



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# File 'lib/ruby-debug/commands/trace.rb', line 44

def help_command
  'trace'
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/ruby-debug/commands/trace.rb', line 10

def execute
  if @match[1] =~ /on|off/
    onoff = 'on' == @match[1] 
    if @match[2]
      Debugger.current_context.tracing = onoff
      print "Tracing %s all threads.\n" % (onoff ? 'on' : 'off')
    else
      Debugger.tracing = onoff
      print "Tracing %s on current thread.\n"  % (onoff ? 'on' : 'off')
    end
  elsif @match[1] =~ /var(?:iable)?/
    varname=@match[2]
    if debug_eval("defined?(#{varname})")
      if @match[3] && @match[3] !~ /(:?no)?stop/
        errmsg("expecting 'stop' or 'nostop'; got %s\n" % @match[3])
      else
        dbg_cmd = if @match[3] && (@match[3] !~ /nostop/) 
                    'debugger' else '' end
      end
      eval("
       trace_var(:#{varname}) do |val|
          print \"traced variable #{varname} has value \#{val}\n\"
          #{dbg_cmd}
       end")
    else
      errmsg "#{varname} is not a global variable.\n"
    end
  else 
    errmsg("expecting 'on', 'off', 'var' or 'variable'; got: %s\n" %
           @match[1])
  end
end

#regexp ⇒ Object 



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# File 'lib/ruby-debug/commands/trace.rb', line 3

def regexp
  /^\s* tr(?:ace)? (?: \s+ (\S+))         # on |off | var(iable)
                   (?: \s+ (\S+))?        # (all | variable-name)?
                   (?: \s+ (\S+))? \s*    # (stop | nostop)? 
   $/ix
end