Questions on jvm interpreter

[Andrew Dinn]

Hi Saravanaraj,

> We are trying to alter the branch conditions taken by a java program at run
> time.
>
> For example if a Java code has conditions like this
>
> if( var == value1)
>     PATH1;
> else
>     PATH2;
>
> Lets say we want to it take PATH2 (even though var might be equal to
> value1). We might not change all branch statements in the class file and we
> can assume there is another source (say a text file) which contains what
> conditions needs to be changed.

JBoss project Byteman provides a relatively easy way to redefine 
behaviour of Java code at runtime. It allows you to specify 
modifications to the program as Java source code and performs all the 
necessary type-checking, linking and rewriting of the bytecode 
automatically. If you want to read about it or try it out everything you 
will need is available via the homepage

   http://www.jboss.org/byteman

If you have any questions about Byteman please post them to the User 
Forum (accessible from the home page) so that other users can benefit 
from the replies provided. Thanks.

regards,


Andrew Dinn
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