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BinaryPolicy.java
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191 lines (169 loc) · 6.75 KB
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package guideforce.policy;
import guideforce.regions.SpecialRegion;
import guideforce.types.Monad;
import soot.SootMethodRef;
import soot.VoidType;
import soot.jimple.AnyNewExpr;
import soot.jimple.StringConstant;
import guideforce.interproc.CallingContext;
import guideforce.interproc.Location;
import guideforce.policy.AbstractDomain.Finitary;
import guideforce.policy.automata.Automaton;
import guideforce.policy.automata.AutomatonAbstractDomain;
import guideforce.regions.AllocationSiteRegion;
import guideforce.regions.MonoidRegion;
import guideforce.regions.Region;
import javax.annotation.Nonnull;
import java.util.List;
public class BinaryPolicy implements Policy {
private final AutomatonAbstractDomain abstractDomain;
public BinaryPolicy() {
Automaton a = new Automaton();
a.addAlphabetSymbol(Token.U);
a.addAlphabetSymbol(Token.T);
a.addState("U");
a.addState("T");
a.addEdge("U", "U", Token.U);
a.addEdge("U", "T", Token.T);
a.addEdge("T", "T", Token.U);
a.addEdge("T", "T", Token.T);
a.setInitialState("U");
a.addFinalState("U");
this.abstractDomain = new AutomatonAbstractDomain(a);
}
@Override
public AbstractDomain getAbstractDomain() {
return this.abstractDomain;
}
@Override
public Region getRegion(CallingContext ctx, Location location, StringConstant c) {
return new MonoidRegion(abstractDomain, abstractDomain.read(Token.U));
}
@Override
public Region getRegion(CallingContext ctx, Location location, AnyNewExpr expr) {
return new AllocationSiteRegion(expr, ctx, location);
}
@Override
public Intrinsic getIntrinsicMethod(SootMethodRef method) {
// TODO: Write specific tests for all cases.
switch (method.getSignature()) {
case "<java.lang.String: void <init>()>":
return new Intrinsic() {
@Nonnull
@Override
public Monad<Region> getReturnType(Region region, List<Region> argumentTypes) {
Region regionU = new MonoidRegion(abstractDomain, abstractDomain.read(Token.U));
return Monad.pure(abstractDomain, regionU);
}
@Nonnull
@Override
public Monad<Region> getExceptionalType(Region region, List<Region> argumentTypes) {
return Monad.empty(abstractDomain);
}
};
case "<java.lang.String: void <init>(java.lang.String)>":
return new Intrinsic() {
@Nonnull
@Override
public Monad<Region> getReturnType(Region region, List<Region> refinedArgs) {
assert refinedArgs.size() == 1;
return Monad.pure(abstractDomain, refinedArgs.get(0));
}
@Nonnull
@Override
public Monad<Region> getExceptionalType(Region region, List<Region> argumentTypes) {
return Monad.empty(abstractDomain);
}
};
case "<java.lang.String: java.lang.String concat(java.lang.String)>":
case "<java.lang.String: java.lang.String valueOf(java.lang.String)>":
return new Intrinsic() {
@Nonnull
@Override
public Monad<Region> getReturnType(Region region, List<Region> refinedArgs) {
assert refinedArgs.size() == 1;
return Monad.pure(abstractDomain, region).join(Monad.pure(abstractDomain, refinedArgs.get(0)));
}
@Nonnull
@Override
public Monad<Region> getExceptionalType(Region region, List<Region> argumentTypes) {
return Monad.empty(abstractDomain);
}
};
case "<java.lang.String: java.lang.String replace(char,char)>":
case "<java.lang.String: java.lang.String substring(int)>":
case "<java.lang.String: java.lang.String substring(int,int)>":
case "<java.lang.String: java.lang.String toLowerCase()>":
case "<java.lang.String: java.lang.String toLowerCase(java.util.Locale)>":
case "<java.lang.String: java.lang.String toUpperCase()>":
case "<java.lang.String: java.lang.String toUpperCase(java.util.Locale)>":
case "<java.lang.Object: java.lang.String toString()>":
case "<java.lang.String: java.lang.String toString()>":
return new Intrinsic() {
@Nonnull
@Override
public Monad<Region> getReturnType(Region region, List<Region> argumentTypes) {
return Monad.pure(abstractDomain, region);
}
@Nonnull
@Override
public Monad<Region> getExceptionalType(Region region, List<Region> argumentTypes) {
return Monad.empty(abstractDomain);
}
};
case "<ourlib.nonapp.TaintAPI: void outputString(java.lang.String)>":
return new Intrinsic() {
@Nonnull
@Override
public Monad<Region> getReturnType(Region region, List<Region> refinedArgs) {
assert method.getReturnType().equals(VoidType.v());
return Monad.pure(abstractDomain, (Region) SpecialRegion.BASETYPE_REGION)
.then(getEffect(region, refinedArgs));
}
@Nonnull
@Override
public Monad<Region> getExceptionalType(Region region, List<Region> argumentTypes) {
return Monad.empty(abstractDomain);
}
@Nonnull
public Finitary getEffect(Region region, List<Region> argumentTypes) {
// outputString has exactly the effects that are included in the regions of its
// argument.
assert (argumentTypes.size() == 1);
Region arg1 = argumentTypes.get(0);
Finitary effect = abstractDomain.oneFinitary();
// argument is atomic, so this loop will be taken exactly once
if (arg1 instanceof MonoidRegion) {
effect = ((MonoidRegion) arg1).asFinitary();
}
return effect;
}
};
//case "<java.net.URLDecoder: java.lang.String decode(java.lang.String,java.lang.String)>":
case "<ourlib.nonapp.TaintAPI: java.lang.String getTaintedString()>":
return new Intrinsic() {
@Nonnull
@Override
public Monad<Region> getReturnType(Region region, List<Region> argumentTypes) {
Region regionT = new MonoidRegion(abstractDomain, abstractDomain.read(Token.T));
return Monad.pure(abstractDomain, regionT)
.then(getEffect(region, argumentTypes));
}
@Nonnull
@Override
public Monad<Region> getExceptionalType(Region region, List<Region> argumentTypes) {
return Monad.empty(abstractDomain);
}
@Nonnull
public Finitary getEffect(Region region, List<Region> argumentTypes) {
return abstractDomain.oneFinitary();
}
};
default:
return null;
}
}
public enum Token {
U, T
}
}