soot.jimple.spark.pag.FieldRefNode Maven / Gradle / Ivy
package soot.jimple.spark.pag;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2002 Ondrej Lhotak
* %%
* This program 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 program 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 General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
/**
* Represents a field reference node (Red) in the pointer assignment graph.
*
* @author Ondrej Lhotak
*/
public class FieldRefNode extends ValNode {
/** Returns the base of this field reference. */
public VarNode getBase() {
return base;
}
public Node getReplacement() {
if (replacement == this) {
if (base.replacement == base) {
return this;
}
Node baseRep = base.getReplacement();
FieldRefNode newRep = pag.makeFieldRefNode((VarNode) baseRep, field);
newRep.mergeWith(this);
return replacement = newRep.getReplacement();
} else {
return replacement = replacement.getReplacement();
}
}
/** Returns the field of this field reference. */
public SparkField getField() {
return field;
}
public String toString() {
return "FieldRefNode " + getNumber() + " " + base + "." + field;
}
/* End of public methods. */
FieldRefNode(PAG pag, VarNode base, SparkField field) {
super(pag, null);
if (field == null) {
throw new RuntimeException("null field");
}
this.base = base;
this.field = field;
base.addField(this, field);
pag.getFieldRefNodeNumberer().add(this);
}
/* End of package methods. */
protected VarNode base;
protected SparkField field;
}