soot.jimple.validation.FieldRefValidator Maven / Gradle / Ivy
package soot.jimple.validation;
/*-
* #%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 java.util.List;
import soot.Body;
import soot.ResolutionFailedException;
import soot.SootField;
import soot.SootMethod;
import soot.Unit;
import soot.jimple.FieldRef;
import soot.jimple.InstanceFieldRef;
import soot.jimple.StaticFieldRef;
import soot.jimple.Stmt;
import soot.util.Chain;
import soot.validation.BodyValidator;
import soot.validation.UnitValidationException;
import soot.validation.ValidationException;
public enum FieldRefValidator implements BodyValidator {
INSTANCE;
public static FieldRefValidator v() {
return INSTANCE;
}
/**
* Checks the consistency of field references.
*/
@Override
public void validate(Body body, List exceptions) {
SootMethod method = body.getMethod();
if (method.isAbstract()) {
return;
}
Chain units = body.getUnits().getNonPatchingChain();
for (Unit unit : units) {
Stmt s = (Stmt) unit;
if (!s.containsFieldRef()) {
continue;
}
FieldRef fr = s.getFieldRef();
if (fr instanceof StaticFieldRef) {
StaticFieldRef v = (StaticFieldRef) fr;
try {
SootField field = v.getField();
if (field == null) {
exceptions.add(new UnitValidationException(unit, body, "Resolved field is null: " + fr.toString()));
} else if (!field.isStatic() && !field.isPhantom()) {
exceptions
.add(new UnitValidationException(unit, body, "Trying to get a static field which is non-static: " + v));
}
} catch (ResolutionFailedException e) {
exceptions.add(new UnitValidationException(unit, body, "Trying to get a static field which is non-static: " + v));
}
} else if (fr instanceof InstanceFieldRef) {
InstanceFieldRef v = (InstanceFieldRef) fr;
try {
SootField field = v.getField();
if (field == null) {
exceptions.add(new UnitValidationException(unit, body, "Resolved field is null: " + fr.toString()));
} else if (field.isStatic() && !field.isPhantom()) {
exceptions.add(new UnitValidationException(unit, body, "Trying to get an instance field which is static: " + v));
}
} catch (ResolutionFailedException e) {
exceptions.add(new UnitValidationException(unit, body, "Trying to get an instance field which is static: " + v));
}
} else {
throw new RuntimeException("unknown field ref");
}
}
}
@Override
public boolean isBasicValidator() {
return true;
}
}