Ruby attach to process

bin/gdb_wrapper

@@ -13,15 +13,15 @@ options = OpenStruct.new(
 opts = OptionParser.new do |opts|
   # TODO need some banner
   opts.banner = <<EOB
-Some usefull banner.
+Some useful banner.
 EOB
 
   opts.on("--pid PID", "pid of process you want to attach to for debugging") do |pid|
     options.pid = pid
   end
 
-  opts.on("--sdk-path SDK_PATH", "path to ruby interpreter") do |sdk_path|
-    options.sdk_path = sdk_path
+  opts.on("--ruby-path SDK_PATH", "path to ruby interpreter") do |ruby_path|
+    options.ruby_path = ruby_path
   end
 
   opts.on("--uid UID", "uid which this process should set after executing gdb attach") do |uid|
@@ -40,8 +40,8 @@ unless options.pid
   exit 1
 end
 
-unless options.sdk_path
-  $stderr.puts "You must specify SDK_PATH of ruby interpreter"
+unless options.ruby_path
+  $stderr.puts "You must specify RUBY_PATH of ruby interpreter"
   exit 1
 end
 
@@ -61,27 +61,34 @@ gems_to_include = '["' + options.gems_to_include * '", "' + '"]'
 
 commands_list = []
 
-def commands_list.add_command(command)
-  self << "-ex \"#{command}\""
+def commands_list.<<(command)
+  self.push "-ex \"#{command}\""
 end
 
-path_to_debugger_loader = File.expand_path(File.dirname(__FILE__)) + "/../lib/ruby-debug-ide/attach/debugger_loader"
+path_to_debugger_loader = File.expand_path(File.dirname(__FILE__)) + '/../lib/ruby-debug-ide/attach/debugger_loader'
 
-# rb_finish: wait while execution comes to the next line (this is essential!)
-commands_list.add_command("call rb_eval_string_protect(\\\"set_trace_func lambda{|event, file, line, id, binding, classname| if /line/ =~ event; sleep 0; set_trace_func(nil); end}\\\", (int *)0)")
-commands_list.add_command("tbreak rb_f_sleep")
-commands_list.add_command("cont")
+# rb_finish: wait while execution comes to the next line.
+# This is essential because we could interrupt process in a middle
+# of some evaluations (e.g., system call)
+commands_list << "call rb_eval_string_protect(\\\"set_trace_func lambda{|event, file, line, id, binding, classname| if /line/ =~ event; sleep 0; set_trace_func(nil); end}\\\", (int *)0)"
+commands_list << "tbreak rb_f_sleep"
+commands_list << "cont"
 
 # evalr: loading debugger into the process
 evalr = "call rb_eval_string_protect(%s, (int *)0)"
-commands_list.add_command("#{evalr}" % ["(\\\"require '#{path_to_debugger_loader}'; load_debugger(#{gems_to_include.gsub("\"", "'")}, #{argv.gsub("\"", "'")})\\\")"])
+commands_list << ("#{evalr}" % ["(\\\"require '#{path_to_debugger_loader}'; load_debugger(#{gems_to_include.gsub("\"", "'")}, #{argv.gsub("\"", "'")})\\\")"])
 
 # q: exit gdb and continue process execution with debugger
-commands_list.add_command("q")
+commands_list << "q"
 
-cmd = "gdb #{options.sdk_path} #{options.pid} -nh -nx -batch #{commands_list.join(" ")}"
+cmd = "gdb #{options.ruby_path} #{options.pid} -nh -nx -batch #{commands_list.join(" ")}"
 
-$stderr.puts "Fast Debugger "
+options.gems_to_include.each do |gem_path|
+  $LOAD_PATH.unshift(gem_path) unless $LOAD_PATH.include?(gem_path)
+end
+
+require 'ruby-debug-ide/greeter'
+Debugger::print_greeting_msg(nil, nil)
 $stderr.puts "Running command #{cmd}"
 
 `#{cmd}` or raise "GDB failed. Aborting."

bin/rdebug-ide

@@ -99,9 +99,11 @@ if ARGV.empty? && !options.attach_mode
   exit(1)
 end
 
-unless options.attach_mode
-  # save script name
+# save script name
+if !options.attach_mode
   Debugger::PROG_SCRIPT = ARGV.shift
+else
+  Debugger::PROG_SCRIPT = $0
 end
 
 if options.dispatcher_port != -1
@@ -135,8 +137,11 @@ Debugger.value_as_nested_element = options.value_as_nested_element || options.rm
 if options.attach_mode
   Debugger::MultiProcess::pre_child(options)
 
+  # This will trigger `setup_tracepoints` and `prepare_context` (which is private in debase)
+  # without any actual excessive code execution.
   if Debugger::FRONT_END == "debase"
-    Debugger.enable_trace_points
+    EMPTY_TEMPLATE = File.expand_path(File.dirname(__FILE__)) + '/../lib/ruby-debug-ide/attach/empty_file.rb'
+    Debugger.debug_load(EMPTY_TEMPLATE)
   end
 else
   Debugger.debug_program(options)

lib/ruby-debug-ide.rb

@@ -10,10 +10,10 @@
   Debugger::FRONT_END = "debase"
 end
 
-require_relative 'ruby-debug-ide/version'
-require_relative 'ruby-debug-ide/xml_printer'
-require_relative 'ruby-debug-ide/ide_processor'
-require_relative 'ruby-debug-ide/event_processor'
+require 'ruby-debug-ide/greeter'
+require 'ruby-debug-ide/xml_printer'
+require 'ruby-debug-ide/ide_processor'
+require 'ruby-debug-ide/event_processor'
 
 module Debugger
 
@@ -137,23 +137,6 @@ def start_control(host, port, notify_dispatcher)
       end
     end
 
-    def print_greeting_msg(host, port)
-      base_gem_name = if defined?(JRUBY_VERSION) || RUBY_VERSION < '1.9.0'
-        'ruby-debug-base'
-      elsif RUBY_VERSION < '2.0.0'
-        'ruby-debug-base19x'
-      else
-        'debase'
-      end
-
-      file_filtering_support = if Command.file_filter_supported?
-       'supported'
-      else
-       'not supported'
-      end
-      $stderr.printf "Fast Debugger (ruby-debug-ide #{IDE_VERSION}, #{base_gem_name} #{VERSION}, file filtering is #{file_filtering_support}) listens on #{host}:#{port}\n"
-    end
-
     private
 
 

lib/ruby-debug-ide/attach/debugger_loader.rb

@@ -1,8 +1,8 @@
 def load_debugger(gems_to_include, new_argv)
-  path_to_rdebug = File.expand_path(File.dirname(__FILE__)) + "/../../../bin/rdebug-ide"
+  path_to_rdebug = File.expand_path(File.dirname(__FILE__)) + '/../../../bin/rdebug-ide'
 
   old_argv = ARGV.clone
-  ARGV.reject {|x| true}
+  ARGV.clear
   new_argv.each do |x|
     ARGV << x
   end
@@ -13,7 +13,7 @@ def load_debugger(gems_to_include, new_argv)
 
   load path_to_rdebug
 
-  ARGV.reject {|x| true}
+  ARGV.clear
   old_argv.each do |x|
     ARGV << x
   end

lib/ruby-debug-ide/greeter.rb

@@ -0,0 +1,40 @@
+if RUBY_VERSION < '2.0' || defined?(JRUBY_VERSION)
+  require 'ruby-debug-base'
+else
+  require 'debase'
+end
+
+require 'ruby-debug-ide/version'
+require 'ruby-debug-ide/ide_processor'
+
+module Debugger
+
+  class << self
+    def print_greeting_msg(host, port)
+      base_gem_name = if defined?(JRUBY_VERSION) || RUBY_VERSION < '1.9.0'
+                        'ruby-debug-base'
+                      elsif RUBY_VERSION < '2.0.0'
+                        'ruby-debug-base19x'
+                      else
+                        'debase'
+                      end
+
+      file_filtering_support = if Command.file_filter_supported?
+                                 'supported'
+                               else
+                                 'not supported'
+                               end
+
+      if host && port
+        listens_on = " listens on #{host}:#{port}\n"
+      else
+        listens_on = "\n"
+      end
+
+      msg = "Fast Debugger (ruby-debug-ide #{IDE_VERSION}, #{base_gem_name} #{VERSION}, file filtering is #{file_filtering_support})" + listens_on
+
+      $stderr.printf msg
+    end
+  end
+
+end

lib/ruby-debug-ide/ide_processor.rb

@@ -1,5 +1,5 @@
-require_relative 'interface'
-require_relative 'command'
+require 'ruby-debug-ide/interface'
+require 'ruby-debug-ide/command'
 
 module Debugger
   class IdeCommandProcessor

ruby-debug-ide.gemspec

@@ -36,7 +36,7 @@ EOF
   spec.platform = Gem::Platform::RUBY
   spec.require_path = "lib"
   spec.bindir = "bin"
-  spec.executables = ["rdebug-ide"]
+  spec.executables = ["rdebug-ide", "gdb_wrapper"]
   spec.files = FILES
 
   spec.extensions << "ext/mkrf_conf.rb" unless ENV['NO_EXT']