private ArrayList<AnnotationElem> handleAnnotationElement(
AnnotationElement ae, List<? extends EncodedValue> evList) {
ArrayList<AnnotationElem> aelemList = new ArrayList<AnnotationElem>();
for (EncodedValue ev : evList) {
int type = ev.getValueType();
AnnotationElem elem = null;
Debug.printDbg("encoded value type: ", type);
switch (type) {
case 0x00: // BYTE
{
ByteEncodedValue v = (ByteEncodedValue) ev;
elem = new AnnotationIntElem(v.getValue(), 'B', ae.getName());
break;
}
case 0x02: // SHORT
{
ShortEncodedValue v = (ShortEncodedValue) ev;
elem = new AnnotationIntElem(v.getValue(), 'S', ae.getName());
break;
}
case 0x03: // CHAR
{
CharEncodedValue v = (CharEncodedValue) ev;
elem = new AnnotationIntElem(v.getValue(), 'C', ae.getName());
break;
}
case 0x04: // INT
{
IntEncodedValue v = (IntEncodedValue) ev;
elem = new AnnotationIntElem(v.getValue(), 'I', ae.getName());
break;
}
case 0x06: // LONG
{
LongEncodedValue v = (LongEncodedValue) ev;
elem = new AnnotationLongElem(v.getValue(), 'J', ae.getName());
break;
}
case 0x10: // FLOAT
{
FloatEncodedValue v = (FloatEncodedValue) ev;
elem = new AnnotationFloatElem(v.getValue(), 'F', ae.getName());
break;
}
case 0x11: // DOUBLE
{
DoubleEncodedValue v = (DoubleEncodedValue) ev;
elem = new AnnotationDoubleElem(v.getValue(), 'D', ae.getName());
break;
}
case 0x17: // STRING
{
StringEncodedValue v = (StringEncodedValue) ev;
elem = new AnnotationStringElem(v.getValue(), 's', ae.getName());
Debug.printDbg("value for string: ", v.getValue());
break;
}
case 0x18: // TYPE
{
TypeEncodedValue v = (TypeEncodedValue) ev;
elem = new AnnotationClassElem(DexType.toSootAT(v.getValue()), 'c', ae.getName());
break;
}
case 0x19: // FIELD (Dalvik specific?)
{
FieldEncodedValue v = (FieldEncodedValue) ev;
FieldReference fr = v.getValue();
String fieldSig = "";
fieldSig += DexType.toSootAT(fr.getDefiningClass()) + ": ";
fieldSig += DexType.toSootAT(fr.getType()) + " ";
fieldSig += fr.getName();
Debug.printDbg("FIELD: ", fieldSig);
elem = new AnnotationStringElem(fieldSig, 'f', ae.getName());
break;
}
case 0x1a: // METHOD (Dalvik specific?)
{
MethodEncodedValue v = (MethodEncodedValue) ev;
MethodReference mr = v.getValue();
String className = DexType.toSootICAT(mr.getDefiningClass());
String returnType = DexType.toSootAT(mr.getReturnType());
String methodName = mr.getName();
String parameters = "";
for (CharSequence p : mr.getParameterTypes()) {
parameters += DexType.toSootAT(p.toString());
}
String mSig = className + " |" + methodName + " |" + parameters + " |" + returnType;
elem = new AnnotationStringElem(mSig, 'M', ae.getName());
break;
}
case 0x1b: // ENUM : Warning -> encoding Dalvik specific!
{
EnumEncodedValue v = (EnumEncodedValue) ev;
FieldReference fr = v.getValue();
elem =
new AnnotationEnumElem(
DexType.toSootAT(fr.getType()).toString(), fr.getName(), 'e', ae.getName());
break;
}
case 0x1c: // ARRAY
{
ArrayEncodedValue v = (ArrayEncodedValue) ev;
ArrayList<AnnotationElem> l = handleAnnotationElement(ae, v.getValue());
if (l != null) elem = new AnnotationArrayElem(l, '[', ae.getName());
break;
}
case 0x1d: // ANNOTATION
{
AnnotationEncodedValue v = (AnnotationEncodedValue) ev;
AnnotationTag t = new AnnotationTag(DexType.toSootAT(v.getType()).toString());
for (AnnotationElement newElem : v.getElements()) {
List<EncodedValue> l = new ArrayList<EncodedValue>();
l.add(newElem.getValue());
List<AnnotationElem> aList = handleAnnotationElement(newElem, l);
if (aList != null) for (AnnotationElem e : aList) t.addElem(e);
}
elem = new AnnotationAnnotationElem(t, '@', ae.getName());
break;
}
case 0x1e: // NULL (Dalvik specific?)
{
elem = new AnnotationStringElem(null, 'N', ae.getName());
break;
}
case 0x1f: // BOOLEAN
{
BooleanEncodedValue v = (BooleanEncodedValue) ev;
elem = new AnnotationBooleanElem(v.getValue(), 'Z', ae.getName());
break;
}
default:
{
throw new RuntimeException("Unknown annotation element 0x" + Integer.toHexString(type));
}
} // switch (type)
if (elem != null) aelemList.add(elem);
} // for (EncodedValue)
return aelemList;
}
private static boolean internalAggregate(
StmtBody body, Map<ValueBox, Zone> boxToZone, boolean onlyStackVars) {
LocalUses localUses;
LocalDefs localDefs;
ExceptionalUnitGraph graph;
boolean hadAggregation = false;
Chain<Unit> units = body.getUnits();
graph = new ExceptionalUnitGraph(body);
localDefs = new SmartLocalDefs(graph, new SimpleLiveLocals(graph));
localUses = new SimpleLocalUses(graph, localDefs);
List<Unit> unitList = new PseudoTopologicalOrderer<Unit>().newList(graph, false);
for (Unit u : unitList) {
if (!(u instanceof AssignStmt)) continue;
AssignStmt s = (AssignStmt) u;
Value lhs = s.getLeftOp();
if (!(lhs instanceof Local)) continue;
Local lhsLocal = (Local) lhs;
if (onlyStackVars && !lhsLocal.getName().startsWith("$")) continue;
List<UnitValueBoxPair> lu = localUses.getUsesOf(s);
if (lu.size() != 1) continue;
UnitValueBoxPair usepair = lu.get(0);
Unit use = usepair.unit;
ValueBox useBox = usepair.valueBox;
List<Unit> ld = localDefs.getDefsOfAt(lhsLocal, use);
if (ld.size() != 1) continue;
// Check to make sure aggregation pair in the same zone
if (boxToZone.get(s.getRightOpBox()) != boxToZone.get(usepair.valueBox)) {
continue;
}
/* we need to check the path between def and use */
/* to see if there are any intervening re-defs of RHS */
/* in fact, we should check that this path is unique. */
/* if the RHS uses only locals, then we know what
to do; if RHS has a method invocation f(a, b,
c) or field access, we must ban field writes, other method
calls and (as usual) writes to a, b, c. */
boolean cantAggr = false;
boolean propagatingInvokeExpr = false;
boolean propagatingFieldRef = false;
boolean propagatingArrayRef = false;
ArrayList<FieldRef> fieldRefList = new ArrayList<FieldRef>();
LinkedList<Value> localsUsed = new LinkedList<Value>();
for (ValueBox vb : s.getUseBoxes()) {
Value v = vb.getValue();
if (v instanceof Local) localsUsed.add(v);
else if (v instanceof InvokeExpr) propagatingInvokeExpr = true;
else if (v instanceof ArrayRef) propagatingArrayRef = true;
else if (v instanceof FieldRef) {
propagatingFieldRef = true;
fieldRefList.add((FieldRef) v);
}
}
// look for a path from s to use in graph.
// only look in an extended basic block, though.
List<Unit> path = graph.getExtendedBasicBlockPathBetween(s, use);
if (path == null) continue;
Iterator<Unit> pathIt = path.iterator();
// skip s.
if (pathIt.hasNext()) pathIt.next();
while (pathIt.hasNext() && !cantAggr) {
Stmt between = (Stmt) (pathIt.next());
if (between != use) {
// Check for killing definitions
for (ValueBox vb : between.getDefBoxes()) {
Value v = vb.getValue();
if (localsUsed.contains(v)) {
cantAggr = true;
break;
}
if (propagatingInvokeExpr || propagatingFieldRef || propagatingArrayRef) {
if (v instanceof FieldRef) {
if (propagatingInvokeExpr) {
cantAggr = true;
break;
} else if (propagatingFieldRef) {
// Can't aggregate a field access if passing a definition of a field
// with the same name, because they might be aliased
for (FieldRef fieldRef : fieldRefList) {
if (((FieldRef) v).getField() == fieldRef.getField()) {
cantAggr = true;
break;
}
}
}
} else if (v instanceof ArrayRef) {
if (propagatingInvokeExpr) {
// Cannot aggregate an invoke expr past an array write
cantAggr = true;
break;
} else if (propagatingArrayRef) {
// cannot aggregate an array read past a write
// this is somewhat conservative
// (if types differ they may not be aliased)
cantAggr = true;
break;
}
}
}
}
// Make sure not propagating past a {enter,exit}Monitor
if (propagatingInvokeExpr && between instanceof MonitorStmt) cantAggr = true;
}
// Check for intervening side effects due to method calls
if (propagatingInvokeExpr || propagatingFieldRef || propagatingArrayRef) {
for (final ValueBox box : between.getUseBoxes()) {
if (between == use && box == useBox) {
// Reached use point, stop looking for
// side effects
break;
}
Value v = box.getValue();
if (v instanceof InvokeExpr
|| (propagatingInvokeExpr && (v instanceof FieldRef || v instanceof ArrayRef))) {
cantAggr = true;
break;
}
}
}
}
// we give up: can't aggregate.
if (cantAggr) {
continue;
}
/* assuming that the d-u chains are correct, */
/* we need not check the actual contents of ld */
Value aggregatee = s.getRightOp();
if (usepair.valueBox.canContainValue(aggregatee)) {
boolean wasSimpleCopy = isSimpleCopy(usepair.unit);
usepair.valueBox.setValue(aggregatee);
units.remove(s);
hadAggregation = true;
// clean up the tags. If s was not a simple copy, the new statement should get
// the tags of s.
// OK, this fix was wrong. The condition should not be
// "If s was not a simple copy", but rather "If usepair.unit
// was a simple copy". This way, when there's a load of a constant
// followed by an invoke, the invoke gets the tags.
if (wasSimpleCopy) {
// usepair.unit.removeAllTags();
usepair.unit.addAllTagsOf(s);
}
} else {
/*
if(Options.v().verbose())
{
G.v().out.println("[debug] failed aggregation");
G.v().out.println("[debug] tried to put "+aggregatee+
" into "+usepair.stmt +
": in particular, "+usepair.valueBox);
G.v().out.println("[debug] aggregatee instanceof Expr: "
+(aggregatee instanceof Expr));
}*/
}
}
return hadAggregation;
}
/**
* Converts method and method parameters annotations from Dexlib to Jimple
*
* @param h
* @param method
*/
void handleMethodAnnotation(Host h, Method method) {
Set<? extends Annotation> aSet = method.getAnnotations();
if (!(aSet == null || aSet.isEmpty())) {
List<Tag> tags = handleAnnotation(aSet, null);
if (tags != null)
for (Tag t : tags)
if (t != null) {
h.addTag(t);
Debug.printDbg("add method annotation: ", t);
}
}
ArrayList<String> parameterNames = new ArrayList<String>();
boolean addParameterNames = false;
for (MethodParameter p : method.getParameters()) {
String name = p.getName();
parameterNames.add(name);
if (name != null) addParameterNames = true;
}
if (addParameterNames) {
h.addTag(new ParamNamesTag(parameterNames));
}
// Is there any parameter annotation?
boolean doParam = false;
List<? extends MethodParameter> parameters = method.getParameters();
for (MethodParameter p : parameters) {
Debug.printDbg("parameter ", p, " annotations: ", p.getAnnotations());
if (p.getAnnotations().size() > 0) {
doParam = true;
break;
}
}
if (doParam) {
VisibilityParameterAnnotationTag tag =
new VisibilityParameterAnnotationTag(
parameters.size(), AnnotationConstants.RUNTIME_VISIBLE);
for (MethodParameter p : parameters) {
List<Tag> tags = handleAnnotation(p.getAnnotations(), null);
// If we have no tag for this parameter, add a placeholder
// so that we keep the order intact.
if (tags == null) {
tag.addVisibilityAnnotation(null);
continue;
}
VisibilityAnnotationTag paramVat =
new VisibilityAnnotationTag(AnnotationConstants.RUNTIME_VISIBLE);
tag.addVisibilityAnnotation(paramVat);
for (Tag t : tags) {
if (t == null) continue;
AnnotationTag vat = null;
if (!(t instanceof VisibilityAnnotationTag)) {
if (t instanceof DeprecatedTag) {
vat = new AnnotationTag("Ljava/lang/Deprecated;");
} else if (t instanceof SignatureTag) {
SignatureTag sig = (SignatureTag) t;
ArrayList<AnnotationElem> sigElements = new ArrayList<AnnotationElem>();
for (String s : SootToDexUtils.splitSignature(sig.getSignature()))
sigElements.add(new AnnotationStringElem(s, 's', "value"));
AnnotationElem elem = new AnnotationArrayElem(sigElements, 's', "value");
vat = new AnnotationTag("Ldalvik/annotation/Signature;", Collections.singleton(elem));
} else {
throw new RuntimeException(
"error: unhandled tag for parameter annotation in method " + h + " (" + t + ").");
}
} else {
vat = ((VisibilityAnnotationTag) t).getAnnotations().get(0);
}
Debug.printDbg("add parameter annotation: ", t);
paramVat.addAnnotation(vat);
}
}
if (tag.getVisibilityAnnotations().size() > 0) h.addTag(tag);
}
}