116 lines
3.7 KiB
Java
116 lines
3.7 KiB
Java
/*
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* This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html.
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*
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* This file is a derivative of code released under the terms listed below.
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*
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*/
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/*
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*
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* Copyright (c) 2009-2012,
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*
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* Adam Fuchs <afuchs@cs.umd.edu>
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* Avik Chaudhuri <avik@cs.umd.edu>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The names of the contributors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*
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*/
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package org.scandroid.prefixtransfer;
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import com.ibm.wala.dataflow.graph.AbstractMeetOperator;
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import com.ibm.wala.dataflow.graph.ITransferFunctionProvider;
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import com.ibm.wala.fixpoint.UnaryOperator;
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public class PrefixTransferFunctionProvider implements ITransferFunctionProvider<InstanceKeySite, PrefixVariable> {
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public PrefixTransferFunctionProvider()
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{}
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@Override
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public UnaryOperator<PrefixVariable> getEdgeTransferFunction(
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InstanceKeySite src, InstanceKeySite dst) {
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return null;
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}
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@Override
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public AbstractMeetOperator<PrefixVariable> getMeetOperator() {
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return new AbstractMeetOperator<PrefixVariable>()
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{
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@Override
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public boolean equals(Object o) {
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return o != null && o.toString().equals(toString());
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}
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@Override
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public byte evaluate(PrefixVariable lhs, PrefixVariable[] rhs) {
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// System.out.println("Evaluating meet");
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boolean changed = false;
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for (final PrefixVariable rhsTPV : rhs) {
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changed = lhs.updateAll(rhsTPV) || changed;
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}
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return (changed ? (byte) 1 : (byte) 0);
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}
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@Override
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public int hashCode() {
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return toString().hashCode();
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}
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@Override
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public String toString() {
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return "TaintPropagationVariable union";
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}
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};
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}
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@Override
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public UnaryOperator<PrefixVariable> getNodeTransferFunction(InstanceKeySite node) {
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return new PrefixTransferFunction(node);
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}
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@Override
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public boolean hasEdgeTransferFunctions() {
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return false;
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}
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@Override
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public boolean hasNodeTransferFunctions() {
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return true;
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}
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}
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