[Soot-list] Source line number info

[Guillaume Salagnac]

From: Ashok Sreenivas <ashoks at pune.tcs.co.in>
Subject: [Soot-list] Source line number info
Date: Thu, 21 Jul 2005 15:05:07 +0530 (IST)

> Hi
> 
> Is there any I can map back from SSA/shimple representation to
> line numbers etc. in the original Java source code? Of course,
> this is assuming that the class file was created through "javac
> -g" and that no transformations have been performed on the
> shimple representation.


Provided that soot.Main is called with the -keep-line-number switch, I
use something like this :

int getLineNumberForStatement(Stmt s)
{
    List tags = s.getTags();
    
    int ln=-1;
    Iterator it = tags.iterator();
    while(it.hasNext() && ln == -1 )
    {
        Tag tag = (Tag) it.next();
                                
        if (tag instanceof LineNumberTag )
        {
            byte[] value = tag.getValue();
            ln = ((value[0] & 0xff) << 8) | (value[1] & 0xff);
        } 
        else if (tag instanceof SourceLnPosTag)
        {
            ln = ((SourceLnPosTag) tag).startLn();
        }           
        else if (tag instanceof SourceLineNumberTag)
        {
            ln = ((SourceLineNumberTag) tag).getLineNumber();
    			
        }
    }
    
    return ln;
}
 


-Guillaume

-- 
Guillaume Salagnac
PhD Student, Laboratoire Vérimag, Grenoble, France.