soot.dava.toolkits.base.AST.structuredAnalysis.CPVariable Maven / Gradle / Ivy
package soot.dava.toolkits.base.AST.structuredAnalysis;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 1997 - 2018 Raja Vallée-Rai and others
* %%
* 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%
*/
import soot.Local;
import soot.PrimType;
import soot.SootField;
import soot.dava.DavaFlowAnalysisException;
/*
* Needed since we want to track locals and SootFields (not FieldRefs)
*/
public class CPVariable {
private Local local;
private SootField field;
public CPVariable(SootField field) {
this.field = field;
this.local = null;
if (!(field.getType() instanceof PrimType)) {
throw new DavaFlowAnalysisException("Variables managed for CP should only be primitives");
}
}
public CPVariable(Local local) {
this.field = null;
this.local = local;
if (!(local.getType() instanceof PrimType)) {
throw new DavaFlowAnalysisException("Variables managed for CP should only be primitives");
}
}
public boolean containsLocal() {
return (local != null);
}
public boolean containsSootField() {
return (field != null);
}
public SootField getSootField() {
if (containsSootField()) {
return field;
} else {
throw new DavaFlowAnalysisException("getsootField invoked when variable is not a sootfield!!!");
}
}
public Local getLocal() {
if (containsLocal()) {
return local;
} else {
throw new DavaFlowAnalysisException("getLocal invoked when variable is not a local");
}
}
/*
* VERY IMPORTANT METHOD: invoked from ConstantPropagationTuple equals method which is invoked from the main merge
* intersection method of CPFlowSet
*/
public boolean equals(CPVariable var) {
// check they have the same type Local or SootField
if (this.containsLocal() && var.containsLocal()) {
// both locals and same name
if (this.getLocal().getName().equals(var.getLocal().getName())) {
return true;
}
}
if (this.containsSootField() && var.containsSootField()) {
// both SootFields check they have same name
if (this.getSootField().getName().equals(var.getSootField().getName())) {
return true;
}
}
return false;
}
public String toString() {
if (containsLocal()) {
return "Local: " + getLocal().getName();
} else if (containsSootField()) {
return "SootField: " + getSootField().getName();
} else {
return "UNKNOWN CONSTANT_PROPAGATION_VARIABLE";
}
}
}