Re: Source code for a particular instruction

Hi, 

U guys miss understood my question.  I want with out using any
decompiler(they use reverse enginnering I guess).  I have source code
and bytecode I want to know for a specific instruction in the
instruction list the corresponding source code. For example we can
know the line number of a instruction in the source code by using
LinenumberTable. Can we get exact position in the line which has
produced the instruction.

For example

if( (a!=0 && b> 40) || (b!=a && c==d) && (c>=78 || d<40))
    //*   8   14:iload_1         
    //*   9   15:ifeq            24
    //*  10   18:iload_2         
    //*  11   19:bipush          40
    //*  12   21:icmpgt          48
    //*  13   24:iload_2         
    //*  14   25:iload_1         
    //*  15   26:icmpeq          59
    //*  16   29:iload_3         
    //*  17   30:iload           4
    //*  18   32:icmpne          59
    //*  19   35:iload_3         
    //*  20   36:bipush          78
    //*  21   38:icmpge          48
    //*  22   41:iload           4
    //*  23   43:bipush          40
    //*  24   45:icmpge          59    

instructions
    //*  10   18:iload_2         
    //*  11   19:bipush          40
    //*  12   21:icmpgt          48

are being generated for b > 40. How can I say this from bytecode is
there any facility in BCEL to tell the offset in the line for specific
instruction.

thanks inadvance

Bye

On Tue, 9 Nov 2004 14:52:05 +1300, Nick Hynes <[email protected]> wrote:
> Try using DJ java decompiler. It's free, and works well.
> 
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> |||-----Original Message-----
> |||From: Rags [mailto:[email protected]]
> |||Sent: Tuesday, 9 November 2004 12:24 p.m.
> |||To: [email protected]
> |||Subject: Source code for a particular instruction
> |||
> |||
> |||Hi,
> 
> 
> |||
> |||  How to get source code from bytecode?. I tried
> |||Utility.codeToString(...) but
> |||it only gives in JVM instructions. I want source code for specific
> |||instruction(s) in the  byte code. Is there any facility to do that
> |||without
> |||reverse engineering whole bytecode?.
> |||
> |||Thanx in advance.
> |||
> |||Bye
> |||
> |||
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-- 
===========================
Raghu Lingampally
M.tech(cse), II year
IIT Kanpur
India
Ph: 0512-2597653 (After 9pm)
http://www.cse.iitk.ac.in/users/raghul
===========================