Examples with ThisRef soot.jimple.ThisRef used on opensource projects

Example 11 with ThisRef

use of soot.jimple.ThisRef in project soot by Sable.

the class Util method emptyBody.

/**
 * Remove all statements except from IdentityStatements for parameters.
 * Return default value (null or zero or nothing depending on the return
 * type).
 *
 * @param jBody
 */
public static void emptyBody(Body jBody) {
    // identity statements
    List<Unit> idStmts = new ArrayList<Unit>();
    List<Local> idLocals = new ArrayList<Local>();
    for (Unit u : jBody.getUnits()) {
        if (u instanceof IdentityStmt) {
            IdentityStmt i = (IdentityStmt) u;
            if (i.getRightOp() instanceof ParameterRef || i.getRightOp() instanceof ThisRef) {
                idStmts.add(u);
                idLocals.add((Local) i.getLeftOp());
            }
        }
    }
    jBody.getUnits().clear();
    jBody.getLocals().clear();
    jBody.getTraps().clear();
    final LocalGenerator lg = new LocalGenerator(jBody);
    for (Unit u : idStmts) jBody.getUnits().add(u);
    for (Local l : idLocals) jBody.getLocals().add(l);
    Type rType = jBody.getMethod().getReturnType();
    jBody.getUnits().add(Jimple.v().newNopStmt());
    if (rType instanceof VoidType) {
        jBody.getUnits().add(Jimple.v().newReturnVoidStmt());
    } else {
        Type t = jBody.getMethod().getReturnType();
        Local l = lg.generateLocal(t);
        AssignStmt ass = null;
        if (t instanceof RefType || t instanceof ArrayType) {
            ass = Jimple.v().newAssignStmt(l, NullConstant.v());
        } else if (t instanceof LongType) {
            ass = Jimple.v().newAssignStmt(l, LongConstant.v(0));
        } else if (t instanceof FloatType) {
            ass = Jimple.v().newAssignStmt(l, FloatConstant.v(0.0f));
        } else if (t instanceof IntType) {
            ass = Jimple.v().newAssignStmt(l, IntConstant.v(0));
        } else if (t instanceof DoubleType) {
            ass = Jimple.v().newAssignStmt(l, DoubleConstant.v(0));
        } else if (t instanceof BooleanType || t instanceof ByteType || t instanceof CharType || t instanceof ShortType) {
            ass = Jimple.v().newAssignStmt(l, IntConstant.v(0));
        } else {
            throw new RuntimeException("error: return type unknown: " + t + " class: " + t.getClass());
        }
        jBody.getUnits().add(ass);
        jBody.getUnits().add(Jimple.v().newReturnStmt(l));
    }
}

Example 12 with ThisRef

use of soot.jimple.ThisRef in project soot by Sable.

the class BuildIntermediateAppClasses method internalTransform.

protected void internalTransform(String phaseName, Map<String, String> options) {
    if (output) {
        out.println("Building Intermediate Classes...");
    }
    BodyBuilder.retrieveAllBodies();
    // iterate through application classes, build intermediate classes
    Iterator<SootClass> it = Scene.v().getApplicationClasses().snapshotIterator();
    while (it.hasNext()) {
        List<SootMethod> initMethodsToRewrite = new ArrayList<>();
        Map<String, SootMethod> methodsToAdd = new HashMap<>();
        SootClass sc = it.next();
        SootClass originalSuperclass = sc.getSuperclass();
        if (output) {
            out.println("Processing " + sc.getName() + " with super " + originalSuperclass.getName());
        }
        Iterator<SootMethod> methodIterator = sc.methodIterator();
        while (methodIterator.hasNext()) {
            SootMethod method = methodIterator.next();
            if (!method.isConcrete()) {
                continue;
            }
            try {
                method.getActiveBody();
            } catch (Exception e) {
                if (method.retrieveActiveBody() == null)
                    throw new RuntimeException(method.getSignature() + " has no body. This was not expected dude.");
            }
            String subSig = method.getSubSignature();
            if (subSig.equals("void main(java.lang.String[])") && method.isPublic() && method.isStatic()) {
                // skip the main method - it needs to be named 'main'
                continue;
            } else if (subSig.indexOf("init>(") > 0) {
                if (subSig.startsWith("void <init>(")) {
                    initMethodsToRewrite.add(method);
                }
                // skip constructors, just add for rewriting at the end
                continue;
            } else {
                Scene.v().releaseActiveHierarchy();
                findAccessibleInSuperClassesBySubSig(sc, subSig).ifPresent(m -> methodsToAdd.put(subSig, m));
            }
        }
        if (methodsToAdd.size() > 0) {
            final String fullName = ClassRenamer.v().getNewName(ClassRenamer.getPackageName(sc.getName()), null);
            if (output) {
                out.println("\tBuilding " + fullName);
            }
            // make non-final soot class
            SootClass mediatingClass = new SootClass(fullName, sc.getModifiers() & (~Modifier.FINAL));
            Main.IntermediateAppClasses.add(mediatingClass);
            mediatingClass.setSuperclass(originalSuperclass);
            Scene.v().addClass(mediatingClass);
            mediatingClass.setApplicationClass();
            mediatingClass.setInScene(true);
            ThisRef thisRef = new ThisRef(mediatingClass.getType());
            for (String subSig : methodsToAdd.keySet()) {
                SootMethod originalSuperclassMethod = methodsToAdd.get(subSig);
                List<Type> paramTypes = originalSuperclassMethod.getParameterTypes();
                Type returnType = originalSuperclassMethod.getReturnType();
                List<SootClass> exceptions = originalSuperclassMethod.getExceptions();
                int modifiers = originalSuperclassMethod.getModifiers() & ~Modifier.ABSTRACT & ~Modifier.NATIVE;
                SootMethod newMethod;
                {
                    // build new junk method to call original method
                    String newMethodName = MethodRenamer.v().getNewName();
                    newMethod = Scene.v().makeSootMethod(newMethodName, paramTypes, returnType, modifiers, exceptions);
                    mediatingClass.addMethod(newMethod);
                    Body body = Jimple.v().newBody(newMethod);
                    newMethod.setActiveBody(body);
                    Chain<Local> locals = body.getLocals();
                    PatchingChain<Unit> units = body.getUnits();
                    BodyBuilder.buildThisLocal(units, thisRef, locals);
                    BodyBuilder.buildParameterLocals(units, locals, paramTypes);
                    if (returnType instanceof VoidType) {
                        units.add(Jimple.v().newReturnVoidStmt());
                    } else if (returnType instanceof PrimType) {
                        units.add(Jimple.v().newReturnStmt(IntConstant.v(0)));
                    } else {
                        units.add(Jimple.v().newReturnStmt(NullConstant.v()));
                    }
                    newmethods++;
                }
                // end build new junk method to call original method
                {
                    // build copy of old method
                    newMethod = Scene.v().makeSootMethod(originalSuperclassMethod.getName(), paramTypes, returnType, modifiers, exceptions);
                    mediatingClass.addMethod(newMethod);
                    Body body = Jimple.v().newBody(newMethod);
                    newMethod.setActiveBody(body);
                    Chain<Local> locals = body.getLocals();
                    PatchingChain<Unit> units = body.getUnits();
                    Local ths = BodyBuilder.buildThisLocal(units, thisRef, locals);
                    List<Local> args = BodyBuilder.buildParameterLocals(units, locals, paramTypes);
                    SootMethodRef superclassMethodRef = originalSuperclassMethod.makeRef();
                    if (returnType instanceof VoidType) {
                        units.add(Jimple.v().newInvokeStmt(Jimple.v().newSpecialInvokeExpr(ths, superclassMethodRef, args)));
                        units.add(Jimple.v().newReturnVoidStmt());
                    } else {
                        Local loc = Jimple.v().newLocal("retValue", returnType);
                        body.getLocals().add(loc);
                        units.add(Jimple.v().newAssignStmt(loc, Jimple.v().newSpecialInvokeExpr(ths, superclassMethodRef, args)));
                        units.add(Jimple.v().newReturnStmt(loc));
                    }
                    newmethods++;
                }
            // end build copy of old method
            }
            sc.setSuperclass(mediatingClass);
            // rewrite class init methods to call the proper superclass inits
            int i = initMethodsToRewrite.size();
            while (i-- > 0) {
                SootMethod im = initMethodsToRewrite.remove(i);
                Body b = im.getActiveBody();
                Local thisLocal = b.getThisLocal();
                Iterator<Unit> uIt = b.getUnits().snapshotIterator();
                while (uIt.hasNext()) {
                    for (ValueBox valueBox : uIt.next().getUseBoxes()) {
                        Value v = valueBox.getValue();
                        if (v instanceof SpecialInvokeExpr) {
                            SpecialInvokeExpr sie = (SpecialInvokeExpr) v;
                            SootMethodRef smr = sie.getMethodRef();
                            if (sie.getBase().equivTo(thisLocal) && smr.declaringClass().getName().equals(originalSuperclass.getName()) && smr.getSubSignature().getString().startsWith("void " + constructorName)) {
                                SootMethod newSuperInit;
                                if (!mediatingClass.declaresMethod(constructorName, smr.parameterTypes())) {
                                    List<Type> paramTypes = smr.parameterTypes();
                                    newSuperInit = Scene.v().makeSootMethod(constructorName, paramTypes, smr.returnType());
                                    mediatingClass.addMethod(newSuperInit);
                                    JimpleBody body = Jimple.v().newBody(newSuperInit);
                                    newSuperInit.setActiveBody(body);
                                    PatchingChain<Unit> initUnits = body.getUnits();
                                    Collection<Local> locals = body.getLocals();
                                    Local ths = BodyBuilder.buildThisLocal(initUnits, thisRef, locals);
                                    List<Local> args = BodyBuilder.buildParameterLocals(initUnits, locals, paramTypes);
                                    initUnits.add(Jimple.v().newInvokeStmt(Jimple.v().newSpecialInvokeExpr(ths, smr, args)));
                                    initUnits.add(Jimple.v().newReturnVoidStmt());
                                } else {
                                    newSuperInit = mediatingClass.getMethod(constructorName, smr.parameterTypes());
                                }
                                sie.setMethodRef(newSuperInit.makeRef());
                            }
                        }
                    }
                }
            }
        // end of rewrite class init methods to call the proper superclass inits
        }
    }
    newclasses = Main.IntermediateAppClasses.size();
    Scene.v().releaseActiveHierarchy();
    Scene.v().getActiveHierarchy();
    Scene.v().setFastHierarchy(new FastHierarchy());
}