140 lines
5.0 KiB
Java
140 lines
5.0 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002 - 2006 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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package com.ibm.wala.analysis.reflection;
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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.IMethod;
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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.Context;
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import com.ibm.wala.ipa.callgraph.ContextSelector;
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import com.ibm.wala.ipa.callgraph.MethodTargetSelector;
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import com.ibm.wala.ipa.callgraph.propagation.InstanceKey;
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import com.ibm.wala.ipa.cha.ClassHierarchy;
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import com.ibm.wala.util.warnings.WarningSet;
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/**
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* For synthetic methods marked as "Factories", we analyze in a context defined by the caller.
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*
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* @author sfink
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*/
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public class FactoryContextSelector implements ContextSelector {
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private final MethodTargetSelector methodTargetSelector;
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private final ClassHierarchy cha;
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/**
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* @param methodTargetSelector
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*/
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public FactoryContextSelector(ClassHierarchy cha, MethodTargetSelector methodTargetSelector) {
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this.cha = cha;
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this.methodTargetSelector = methodTargetSelector;
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.ContextSelector#getCalleeTarget(com.ibm.wala.ipa.callgraph.CGNode, com.ibm.wala.classLoader.CallSiteReference, com.ibm.wala.classLoader.IMethod)
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*/
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public Context getCalleeTarget(CGNode caller, CallSiteReference site, IMethod callee, InstanceKey receiver) {
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if (callee.isSynthetic()) {
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SyntheticMethod s = (SyntheticMethod) callee;
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if (s.isFactoryMethod()) {
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return new CallerSiteContext(caller, site);
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}
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}
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return null;
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.ContextSelector#mayUnderstand(com.ibm.wala.ipa.callgraph.CGNode, com.ibm.wala.classLoader.CallSiteReference, com.ibm.wala.classLoader.IMethod, com.ibm.wala.ipa.callgraph.propagation.InstanceKey)
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*/
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public boolean mayUnderstand(CGNode caller, CallSiteReference site, IMethod targetMethod, InstanceKey instance) {
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if (targetMethod.isSynthetic()) {
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SyntheticMethod s = (SyntheticMethod) targetMethod;
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if (s.isFactoryMethod()) {
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return true;
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}
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}
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return false;
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.ContextSelector#getBoundOnNumberOfTargets(com.ibm.wala.ipa.callgraph.CGNode, com.ibm.wala.classLoader.CallSiteReference, com.ibm.wala.classLoader.IMethod)
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*/
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public int getBoundOnNumberOfTargets(CGNode caller, CallSiteReference site, IMethod callee) {
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if (callee.isSynthetic()) {
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SyntheticMethod s = (SyntheticMethod) callee;
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if (s.isFactoryMethod()) {
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return 1;
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}
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}
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return -1;
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.rta.RTAContextInterpreter#setWarnings(com.ibm.wala.util.warnings.WarningSet)
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*/
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public void setWarnings(WarningSet newWarnings) {
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// this object is not bound to a WarningSet
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.ContextSelector#contextIsIrrelevant(com.ibm.wala.classLoader.CallSiteReference)
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*/
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public boolean contextIsIrrelevant(CGNode node, CallSiteReference site) {
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boolean result = methodTargetSelector.mightReturnSyntheticMethod(node,site);
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if (result) {
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IMethod callee = methodTargetSelector.getCalleeTarget(node, site, null);
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if (callee != null && callee.isSynthetic()) {
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SyntheticMethod s = (SyntheticMethod) callee;
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if (s.isFactoryMethod()) {
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return false;
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} else {
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return true;
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}
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} else {
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return true;
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}
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} else {
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return true;
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}
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}
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/* (non-Javadoc)
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* @see com.ibm.wala.ipa.callgraph.ContextSelector#contextIsIrrelevant(com.ibm.wala.types.MethodReference)
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*/
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public boolean allSitesDispatchIdentically(CGNode node, CallSiteReference site) {
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boolean result = methodTargetSelector.mightReturnSyntheticMethod(node,site);
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if (result) {
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IClass recv = cha.lookupClass(site.getDeclaredTarget().getDeclaringClass());
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if (recv == null) {
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return false;
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}
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IMethod callee = methodTargetSelector.getCalleeTarget(node, site, recv);
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if (callee != null && callee.isSynthetic()) {
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SyntheticMethod s = (SyntheticMethod) callee;
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if (s.isFactoryMethod()) {
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return false;
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} else {
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return true;
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}
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} else {
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return true;
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}
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} else {
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return true;
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}
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}
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}
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