soot.jimple.toolkits.callgraph.ClinitElimAnalysis Maven / Gradle / Ivy
/* Soot - a J*va Optimization Framework
* Copyright (C) 2003 Jennifer Lhotak
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
package soot.jimple.toolkits.callgraph;
import soot.*;
import java.util.*;
import soot.jimple.*;
import soot.toolkits.graph.*;
import soot.toolkits.scalar.*;
public class ClinitElimAnalysis extends ForwardFlowAnalysis {
private UnitGraph g;
public ClinitElimAnalysis(UnitGraph g) {
super(g);
this.g = g;
doAnalysis();
}
public void merge(Object in1, Object in2, Object out) {
FlowSet inSet1 = (FlowSet) in1;
FlowSet inSet2 = (FlowSet) in2;
FlowSet outSet = (FlowSet) out;
inSet1.intersection(inSet2, outSet);
}
public void copy(Object src, Object dest) {
FlowSet srcIn = (FlowSet) src;
FlowSet destOut = (FlowSet) dest;
srcIn.copy(destOut);
}
// out(s) = in(s) intersect { target methods of s where edge kind is clinit}
protected void flowThrough(Object inVal, Object stmt, Object outVal) {
FlowSet in = (FlowSet) inVal;
FlowSet out = (FlowSet) outVal;
Stmt s = (Stmt) stmt;
in.copy(out);
CallGraph cg = Scene.v().getCallGraph();
Iterator edges = cg.edgesOutOf(s);
while (edges.hasNext()){
Edge e = (Edge)edges.next();
if (e.isClinit()) {
out.add(e.tgt());
}
}
}
protected Object entryInitialFlow(){
return new ArraySparseSet();
}
protected Object newInitialFlow(){
ArraySparseSet set = new ArraySparseSet();
CallGraph cg = Scene.v().getCallGraph();
Iterator mIt = cg.edgesOutOf(g.getBody().getMethod());
while (mIt.hasNext()){
Edge edge = (Edge)mIt.next();
if (edge.isClinit()){
set.add(edge.tgt());
}
}
return set;
}
}