Wilderness: Beta of IDBG -- Installs debug code in sources

As I am just starting to explore Ruby Core -- I found a need to Follow 
the Code Execution Function
by Function,  primarily in 'eval.c'.
   Problem:  There are in excess of 350 functions in 'eval.c' alone.

So I have created a prototype program (Install DeBug:   idbg) automate 
the insertion of debug code
to produce debug version of production source, without changing the 
original.

This first release simply installs a block of code before the first 
executable line in Each Function.
The Code:
      #ifdef THOR_DBG
         if (debug_loaded) {
             fprintf(stdout, "rb_jump_context(...) at 108\n");
         }
     #endif

To turn-on reporting define THOR_DBG.  An example of the output is as 
follows:

ruby_x   - Modified 10-17-2005
Ruby 1.9.0  -  Integrated 'debug.c' and setup debug hooks in standard code!
ruby 1.9.0 (2005-10-14) [i686-linux]

Set Flags: debug_loaded = 1
Set Flags: ruby_debug_flag = 4

Ruby 1.9.0  -  Debug Flag = 0x00000004
Inner Class Defined
Outer Class Defined
rb_thread_wait_fd(...) at 12136
ruby_set_current_source(...) at 1252
rb_dvar_push(...) at 966
new_dvar(...) at 895
rb_dvar_push(...) at 966
new_dvar(...) at 895
...

Attached is 'idbg-0.1-beta.tar.gz' with the sources.  ONLY tested on 
FEDORA 3

Future Plans are to automatically dump the input parameters also.
Beyond that I assume that I will define tables or maps to build more
robust installs.  Input Welcome.

       chuck

-- 
GodFather -- 667 Neighbor of the Beast