155 lines
5.4 KiB
Java
155 lines
5.4 KiB
Java
/******************************************************************************
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* Copyright (c) 2002 - 2014 IBM Corporation.
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* All rights reserved. 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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* Contributors:
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* IBM Corporation - initial API and implementation
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*****************************************************************************/
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/**
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* This file is part of the Joana IFC project. It is developed at the
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* Programming Paradigms Group of the Karlsruhe Institute of Technology.
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*
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* For further details on licensing please read the information at
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* http://joana.ipd.kit.edu or contact the authors.
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*/
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package com.ibm.wala.ipa.callgraph.propagation.cfa;
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import java.util.Iterator;
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import com.ibm.wala.cfg.ControlFlowGraph;
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import com.ibm.wala.classLoader.CallSiteReference;
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import com.ibm.wala.classLoader.IClass;
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import com.ibm.wala.classLoader.NewSiteReference;
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import com.ibm.wala.classLoader.ShrikeCTMethod;
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import com.ibm.wala.classLoader.SyntheticMethod;
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import com.ibm.wala.ipa.callgraph.CGNode;
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import com.ibm.wala.ipa.callgraph.propagation.SSAContextInterpreter;
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import com.ibm.wala.ssa.DefUse;
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import com.ibm.wala.ssa.IR;
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import com.ibm.wala.ssa.ISSABasicBlock;
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import com.ibm.wala.ssa.SSAInstruction;
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import com.ibm.wala.types.FieldReference;
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import com.ibm.wala.util.collections.EmptyIterator;
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/**
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* This ContextInterpreter can be used when using another WALA frontend than the shrike frontend. WALA's standard ContextInterpreters, like
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* e.g. DefaultSSAInterpreter delegate to CodeScanner, which assumes, that the provided methods are instances of shrike classes.
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* When using these ContextInterpreter with another frontend than shrike, this leads to ClassCastExceptions. This class can be used to
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* work around this issue. It delegates to a given ContextInterpreter, if the CGNode's IMethod is a Shrike class.
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* Otherwise, it retrieves the required information from the CGNode's IR, which should always work.
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*
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* @author Martin Mohr <martin.mohr@kit.edu>
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*
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* This class is provided by the JOANA project (joana.ipd.kit.edu).
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*/
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public class FallbackContextInterpreter implements SSAContextInterpreter {
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private SSAContextInterpreter shrikeCI;
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public FallbackContextInterpreter(SSAContextInterpreter shrikeCI) {
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this.shrikeCI = shrikeCI;
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.propagation.rta.RTAContextInterpreter#iterateNewSites(com.ibm.wala.ipa.callgraph.CGNode)
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*/
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@Override
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public Iterator<NewSiteReference> iterateNewSites(CGNode node) {
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if (node.getMethod() instanceof SyntheticMethod || node.getMethod() instanceof ShrikeCTMethod) {
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return shrikeCI.iterateNewSites(node);
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} else {
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IR ir = getIR(node);
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if (ir == null) {
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return EmptyIterator.instance();
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} else {
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return ir.iterateNewSites();
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}
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}
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.propagation.rta.RTAContextInterpreter#iterateFieldsRead(com.ibm.wala.ipa.callgraph.CGNode)
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*/
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@Override
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public Iterator<FieldReference> iterateFieldsRead(CGNode node) {
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return shrikeCI.iterateFieldsRead(node);
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.propagation.rta.RTAContextInterpreter#iterateFieldsWritten(com.ibm.wala.ipa.callgraph.CGNode)
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*/
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@Override
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public Iterator<FieldReference> iterateFieldsWritten(CGNode node) {
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return shrikeCI.iterateFieldsWritten(node);
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.cha.CHAContextInterpreter#iterateCallSites(com.ibm.wala.ipa.callgraph.CGNode)
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*/
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@Override
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public Iterator<CallSiteReference> iterateCallSites(CGNode node) {
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if (node.getMethod() instanceof SyntheticMethod || node.getMethod() instanceof ShrikeCTMethod) {
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return shrikeCI.iterateCallSites(node);
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} else {
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IR ir = getIR(node);
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if (ir == null) {
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return EmptyIterator.instance();
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} else {
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return ir.iterateCallSites();
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}
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}
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.propagation.rta.RTAContextInterpreter#recordFactoryType(com.ibm.wala.ipa.callgraph.CGNode, com.ibm.wala.classLoader.IClass)
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*/
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@Override
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public boolean recordFactoryType(CGNode node, IClass klass) {
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return shrikeCI.recordFactoryType(node, klass);
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.cha.CHAContextInterpreter#understands(com.ibm.wala.ipa.callgraph.CGNode)
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*/
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@Override
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public boolean understands(CGNode node) {
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return true;
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.propagation.SSAContextInterpreter#getIR(com.ibm.wala.ipa.callgraph.CGNode)
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*/
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@Override
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public IR getIR(CGNode node) {
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return shrikeCI.getIR(node);
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.propagation.SSAContextInterpreter#getDU(com.ibm.wala.ipa.callgraph.CGNode)
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*/
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@Override
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public DefUse getDU(CGNode node) {
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return shrikeCI.getDU(node);
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.propagation.SSAContextInterpreter#getNumberOfStatements(com.ibm.wala.ipa.callgraph.CGNode)
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*/
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@Override
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public int getNumberOfStatements(CGNode node) {
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return shrikeCI.getNumberOfStatements(node);
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.propagation.SSAContextInterpreter#getCFG(com.ibm.wala.ipa.callgraph.CGNode)
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*/
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@Override
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public ControlFlowGraph<SSAInstruction, ISSABasicBlock> getCFG(CGNode n) {
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return shrikeCI.getCFG(n);
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}
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} |