90 lines
3.1 KiB
Java
90 lines
3.1 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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* Galois, Inc. (Aaron Tomb <atomb@galois.com>,
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* Rogan Creswick <creswick@galois.com>,
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* Adam Foltzer <acfoltzer@galois.com>)
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* Steve Suh <suhsteve@gmail.com>
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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.flow.functions;
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import java.util.Set;
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import org.scandroid.domain.DomainElement;
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import org.scandroid.domain.IFDSTaintDomain;
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import com.ibm.wala.dataflow.IFDS.IUnaryFlowFunction;
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import com.ibm.wala.ssa.ISSABasicBlock;
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import com.ibm.wala.util.intset.IntSet;
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import com.ibm.wala.util.intset.MutableSparseIntSet;
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import com.ibm.wala.util.intset.SparseIntSet;
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/**
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* A flow function which maps the zero fact to a set of new dataflow facts,
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* essentially introducing them from nothing. Identity for all other facts.
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*
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* @author acfoltzer
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*
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*/
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public class ConstantFlowFunction <E extends ISSABasicBlock> implements IUnaryFlowFunction {
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private final MutableSparseIntSet result;
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public ConstantFlowFunction(IFDSTaintDomain<E> domain, Set<DomainElement> elts) {
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result = MutableSparseIntSet.make(TaintTransferFunctions.ZERO_SET);
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for (DomainElement de : elts) {
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result.add(domain.getMappedIndex(de));
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}
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}
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/*
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* (non-Javadoc)
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*
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* @see com.ibm.wala.dataflow.IFDS.IUnaryFlowFunction#getTargets(int)
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*/
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@Override
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public IntSet getTargets(int d1) {
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return 0 == d1 ? result : SparseIntSet.singleton(d1);
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}
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}
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