Re: SootField referencing in a method body

[Ondrej Lhotak <olhotak@sable.mcgill.ca>]

On Wed, Nov 05, 2003 at 05:31:52PM +0100, Emil Slusanschi wrote:
> Hi,
> 
> I am using a SceneTransformer to create a new Method (from an old one 
> through a clone() ) and a new global Field (at the moment it's just a 

By global field, do you mean a static field?

> double). Then I am modifying the new/cloned Method with a 
> BodyTransformer and I try to save a result, another double, in that 
> global Field I defined in the SceneTransformer. The problem is, I cannot 
> seem to get a Value from a SootField no matter what. And for a 
> newAssignStmt I need one. I also tried with newInstanceFieldRef but how 
> can I get a statement out of that? What I want is to have a global Field 
> = method local. I guess that you got it by now that I have a problem 

So you want a Jimple statement like:
C.f = l;

(or if it's a non-static field, l1.f = l;).

You need to do:
Jimple.v().newAssignStmt(
    Jimple.v().newStaticFieldRef(f),
    l
);
where f is a SootField and l is a Local.

If it's a non-static field, you want:
Jimple.v().newAssignStmt(
    Jimple.v().newInstanceFieldRef(l1, f),
    l
);
where l1 and l are Locals and f is a SootField.

Ondrej

> with the call-by-value that Java uses :) and that I need to return to a 
> method more than the original return value, and I would like to avoid 
> using an Array(new return Type) with the old return value plus the new 
> stuff that I create through the transformations that I am doing in the 
> BodyTransformer. I hope I have been clear enough and if anybody has an 
> ideea of how can I achieve what I want, I would be very grateful. And if 
> you have a better idea of doing what I described, that would be even 
> better...
> 
> Cheers,
> 
> Emil
> 
> PS. And by the way, Soot is a really good piece of work ;-)
> 
>