133 lines
4.7 KiB
Java
133 lines
4.7 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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* Galois, Inc. (Aaron Tomb <atomb@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.spec;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.HashSet;
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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.InstanceKeyElement;
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import org.scandroid.flow.InflowAnalysis;
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import org.scandroid.flow.types.FlowType;
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import org.scandroid.flow.types.ParameterFlow;
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import org.scandroid.util.CGAnalysisContext;
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import com.ibm.wala.classLoader.IMethod;
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import com.ibm.wala.dataflow.IFDS.ISupergraph;
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import com.ibm.wala.ipa.callgraph.CGNode;
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import com.ibm.wala.ipa.callgraph.CallGraph;
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import com.ibm.wala.ipa.callgraph.propagation.InstanceKey;
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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.ipa.cfg.BasicBlockInContext;
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import com.ibm.wala.ssa.ISSABasicBlock;
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import com.ibm.wala.ssa.SSAInvokeInstruction;
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import com.ibm.wala.util.collections.HashSetFactory;
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/**
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* CallArgSourceSpecs represent sources that are arguments to another function.
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*
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* For example, if code you analyze invokes a function {@code foo(Object obj)}
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* and foo <em>writes</em> to the argument, then {@code obj} would be a source.
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*
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*/
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public class CallArgSourceSpec extends SourceSpec {
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final String name = "CallArgSource";
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public CallArgSourceSpec(MethodNamePattern name, int[] args) {
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namePattern = name;
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argNums = args;
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}
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@Override
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public <E extends ISSABasicBlock> void addDomainElements(
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CGAnalysisContext<E> ctx,
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Map<BasicBlockInContext<E>, Map<FlowType<E>, Set<CodeElement>>> taintMap,
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IMethod target, BasicBlockInContext<E> block,
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SSAInvokeInstruction invInst, int[] newArgNums,
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ISupergraph<BasicBlockInContext<E>, CGNode> graph,
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PointerAnalysis<InstanceKey> pa, CallGraph cg) {
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for (int newArgNum : newArgNums) {
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for (FlowType<E> ft : getFlowType(block)) {
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// a collection of a LocalElement for this argument's SSA value,
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// along with a set of InstanceKeyElements for each instance
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// that this SSA value might point to
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final int ssaVal = invInst.getUse(newArgNum);
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final CGNode node = block.getNode();
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Set<CodeElement> valueElements = CodeElement.valueElements(ssaVal);
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PointerKey pk = pa.getHeapModel().getPointerKeyForLocal(node, ssaVal);
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for (InstanceKey ik : pa.getPointsToSet(pk)) {
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valueElements.add(new InstanceKeyElement(ik));
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}
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InflowAnalysis.addDomainElements(taintMap, block, ft,
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valueElements);
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}
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}
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}
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public <E extends ISSABasicBlock> Collection<FlowType<E>> getFlowType(
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BasicBlockInContext<E> block) {
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HashSet<FlowType<E>> flowSet = HashSetFactory.make();
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for (int i : argNums) {
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flowSet.add(new ParameterFlow<>(block, i, true));
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}
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return flowSet;
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}
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@Override
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public String toString() {
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return String.format("CallArgSourceSpec(%s, %s)", namePattern, Arrays.toString(argNums));
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}
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}
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