134 lines
4.4 KiB
Java
134 lines
4.4 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.Map;
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import java.util.Set;
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import org.scandroid.domain.CodeElement;
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import org.scandroid.domain.DomainElement;
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import org.scandroid.domain.IFDSTaintDomain;
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import org.scandroid.domain.InstanceKeyElement;
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import org.scandroid.domain.LocalElement;
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import com.ibm.wala.dataflow.IFDS.IUnaryFlowFunction;
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import com.ibm.wala.ipa.callgraph.CGNode;
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import com.ibm.wala.ipa.callgraph.propagation.InstanceKey;
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import com.ibm.wala.ipa.callgraph.propagation.LocalPointerKey;
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import com.ibm.wala.ipa.callgraph.propagation.PointerAnalysis;
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import com.ibm.wala.ipa.callgraph.propagation.PointerKey;
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import com.ibm.wala.ssa.ISSABasicBlock;
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import com.ibm.wala.util.collections.HashMapFactory;
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import com.ibm.wala.util.collections.HashSetFactory;
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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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/**
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* Propagates heap information from InstanceKeys to the LocalElements that point
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* to those keys
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*
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* @author acfoltzer
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*
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* @param <E>
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*/
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public class GlobalReturnToNodeFunction<E extends ISSABasicBlock> implements
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IUnaryFlowFunction {
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private final IFDSTaintDomain<E> domain;
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private final Map<InstanceKey, Set<CodeElement>> ikMap;
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public GlobalReturnToNodeFunction(IFDSTaintDomain<E> domain,
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PointerAnalysis<InstanceKey> pa, CGNode node) {
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this.domain = domain;
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this.ikMap = HashMapFactory.make();
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for (PointerKey pk : pa.getPointerKeys()) {
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if (!(pk instanceof LocalPointerKey)) {
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continue;
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}
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LocalPointerKey lpk = (LocalPointerKey) pk;
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if (!lpk.getNode().equals(node)) {
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continue;
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}
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for (InstanceKey ik : pa.getPointsToSet(lpk)) {
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Set<CodeElement> elts = ikMap.get(ik);
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if (null == elts) {
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elts = HashSetFactory.make();
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ikMap.put(ik, elts);
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}
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elts.add(new LocalElement(lpk.getValueNumber()));
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}
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}
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}
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@Override
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public IntSet getTargets(int d) {
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MutableSparseIntSet set = MutableSparseIntSet.makeEmpty();
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if (0 == d) {
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set.add(d);
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} else {
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DomainElement de = domain.getMappedObject(d);
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if (de.codeElement instanceof InstanceKeyElement) {
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InstanceKey ik = ((InstanceKeyElement) de.codeElement)
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.getInstanceKey();
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Set<CodeElement> elts = ikMap.get(ik);
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if (null != elts) {
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for (CodeElement elt : elts) {
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set.add(domain.getMappedIndex(new DomainElement(elt,
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de.taintSource)));
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}
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}
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} else {
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}
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}
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return set;
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}
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}
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