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Java > Open Source Codes > soot > jimple > toolkits > annotation > liveness > LiveVarsTagger


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 2004 Jennifer Lhotak
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19
20 package soot.jimple.toolkits.annotation.liveness;
21
22 import soot.*;
23 import soot.toolkits.scalar.*;
24 import soot.toolkits.graph.*;
25 import soot.tagkit.*;
26 import java.util.*;
27 import soot.jimple.*;
28
29 public class LiveVarsTagger extends BodyTransformer {
30
31
32     public LiveVarsTagger(Singletons.Global g) {}
33     public static LiveVarsTagger v() { return G.v().soot_jimple_toolkits_annotation_liveness_LiveVarsTagger();}
34
35     protected void internalTransform(Body b, String JavaDoc phaseName, Map options){
36     
37         LiveLocals sll = new SimpleLiveLocals(new ExceptionalUnitGraph(b));
38
39         Iterator it = b.getUnits().iterator();
40         while (it.hasNext()){
41             Stmt s = (Stmt)it.next();
42             //System.out.println("stmt: "+s);
43 Iterator liveLocalsIt = sll.getLiveLocalsAfter(s).iterator();
44             while (liveLocalsIt.hasNext()){
45                 Value v = (Value)liveLocalsIt.next();
46                 s.addTag(new StringTag("Live Variable: "+v, "Live Variable"));
47
48                 Iterator usesIt = s.getUseBoxes().iterator();
49                 while (usesIt.hasNext()){
50                     ValueBox use = (ValueBox)usesIt.next();
51                     if (use.getValue().equals(v)){
52                         use.addTag(new ColorTag(ColorTag.GREEN, "Live Variable"));
53                     }
54                 }
55                 Iterator defsIt = s.getDefBoxes().iterator();
56                 while (defsIt.hasNext()){
57                     ValueBox def = (ValueBox)defsIt.next();
58                     if (def.getValue().equals(v)){
59                         def.addTag(new ColorTag(ColorTag.GREEN, "Live Variable"));
60                     }
61                 }
62             }
63         }
64     }
65 }
66
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