117 lines
4.3 KiB
Java
117 lines
4.3 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.cast.js.ipa.callgraph;
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import java.util.Iterator;
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import com.ibm.wala.cast.ipa.callgraph.AstCFAPointerKeys;
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import com.ibm.wala.cast.ipa.callgraph.ReflectedFieldPointerKey;
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import com.ibm.wala.cast.js.loader.JavaScriptLoader;
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import com.ibm.wala.cast.js.types.JavaScriptTypes;
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import com.ibm.wala.classLoader.IClass;
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import com.ibm.wala.classLoader.IField;
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import com.ibm.wala.ipa.callgraph.AnalysisOptions;
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import com.ibm.wala.ipa.callgraph.IAnalysisCacheView;
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import com.ibm.wala.ipa.callgraph.propagation.ConcreteTypeKey;
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import com.ibm.wala.ipa.callgraph.propagation.ConstantKey;
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import com.ibm.wala.ipa.callgraph.propagation.InstanceKey;
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import com.ibm.wala.ipa.callgraph.propagation.PointerKey;
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import com.ibm.wala.ipa.cha.IClassHierarchy;
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import com.ibm.wala.types.TypeReference;
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import com.ibm.wala.util.collections.EmptyIterator;
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import com.ibm.wala.util.strings.Atom;
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/**
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* Common utilities for CFA-style call graph builders.
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*/
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public abstract class JSCFABuilder extends JSSSAPropagationCallGraphBuilder {
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public JSCFABuilder(IClassHierarchy cha, AnalysisOptions options, IAnalysisCacheView cache) {
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super(JavaScriptLoader.JS.getFakeRootMethod(cha, options, cache), options, cache, new AstCFAPointerKeys() {
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private boolean isBogusKey(InstanceKey K) {
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TypeReference t = K.getConcreteType().getReference();
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return t == JavaScriptTypes.Null || t == JavaScriptTypes.Undefined;
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}
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@Override
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public PointerKey getPointerKeyForObjectCatalog(InstanceKey I) {
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if (isBogusKey(I)) {
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return null;
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} else {
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return super.getPointerKeyForObjectCatalog(I);
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}
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}
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@Override
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public PointerKey getPointerKeyForInstanceField(InstanceKey I, IField f) {
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if (isBogusKey(I)) {
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return null;
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} else {
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return super.getPointerKeyForInstanceField(I, f);
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}
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}
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@Override
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public PointerKey getPointerKeyForArrayContents(InstanceKey I) {
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if (isBogusKey(I)) {
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return null;
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} else {
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return super.getPointerKeyForArrayContents(I);
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}
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}
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@Override
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public Iterator<PointerKey> getPointerKeysForReflectedFieldRead(InstanceKey I, InstanceKey F) {
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if (isBogusKey(I)) {
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return EmptyIterator.instance();
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} else {
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return super.getPointerKeysForReflectedFieldRead(I, F);
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}
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}
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@Override
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public Iterator<PointerKey> getPointerKeysForReflectedFieldWrite(InstanceKey I, InstanceKey F) {
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if (isBogusKey(I)) {
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return EmptyIterator.instance();
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} else {
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return super.getPointerKeysForReflectedFieldWrite(I, F);
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}
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}
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@Override
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protected PointerKey getInstanceFieldPointerKeyForConstant(InstanceKey I, ConstantKey<?> F) {
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Object v = F.getValue();
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String strVal = JSCallGraphUtil.simulateToStringForPropertyNames(v);
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// if we know the string representation of the constant, use it...
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if (strVal != null) {
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IField f = I.getConcreteType().getField(Atom.findOrCreateUnicodeAtom(strVal));
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return getPointerKeyForInstanceField(I, f);
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// ...otherwise it is some unknown string
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} else {
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return ReflectedFieldPointerKey.mapped(new ConcreteTypeKey(getFieldNameType(F)), I);
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}
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}
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/**
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* All values used as property names get implicitly converted to strings in JavaScript.
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* @see com.ibm.wala.cast.ipa.callgraph.DelegatingAstPointerKeys#getFieldNameType(com.ibm.wala.ipa.callgraph.propagation.InstanceKey)
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*/
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@Override
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protected IClass getFieldNameType(InstanceKey F) {
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return F.getConcreteType().getClassHierarchy().lookupClass(JavaScriptTypes.String);
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}
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});
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}
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}
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