124 lines
4.6 KiB
Java
124 lines
4.6 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.ipa.callgraph;
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import java.util.Set;
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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.IClassLoader;
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import com.ibm.wala.classLoader.IMethod;
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import com.ibm.wala.classLoader.Language;
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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.propagation.InstanceKey;
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import com.ibm.wala.ipa.cha.IClassHierarchy;
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import com.ibm.wala.types.ClassLoaderReference;
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import com.ibm.wala.types.Descriptor;
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import com.ibm.wala.types.MethodReference;
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import com.ibm.wala.types.TypeName;
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import com.ibm.wala.types.TypeReference;
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import com.ibm.wala.util.collections.HashSetFactory;
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import com.ibm.wala.util.debug.Assertions;
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import com.ibm.wala.util.intset.IntSet;
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import com.ibm.wala.util.strings.Atom;
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public class MiscellaneousHacksContextSelector implements ContextSelector {
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private final Set<MethodReference> methodsToSpecialize;
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private final ContextSelector specialPolicy;
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private final ContextSelector basePolicy;
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public MiscellaneousHacksContextSelector(ContextSelector special, ContextSelector base, IClassHierarchy cha,
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String[][] descriptors) {
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basePolicy = base;
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specialPolicy = special;
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methodsToSpecialize = HashSetFactory.make();
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for (String[] descr : descriptors) {
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switch (descr.length) {
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// loader name, loader language, classname, method name, method descr
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case 5: {
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ClassLoaderReference clr = cha.getScope().getLoader(Atom.findOrCreateUnicodeAtom(descr[0]));
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IClassLoader loader = cha.getLoader(clr);
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MethodReference ref =
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MethodReference.findOrCreate(
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TypeReference.findOrCreate(clr, TypeName.string2TypeName(descr[2])),
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Atom.findOrCreateUnicodeAtom(descr[3]),
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Descriptor.findOrCreateUTF8(loader.getLanguage(), descr[4]));
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if (cha.resolveMethod(ref) != null) {
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methodsToSpecialize.add(cha.resolveMethod(ref).getReference());
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} else {
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methodsToSpecialize.add(ref);
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}
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break;
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}
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// classname, method name, method descr
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case 3: {
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MethodReference ref = MethodReference.findOrCreate(TypeReference.findOrCreate(ClassLoaderReference.Application, TypeName.string2TypeName(descr[0])), Atom
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.findOrCreateUnicodeAtom(descr[1]), Descriptor.findOrCreateUTF8(Language.JAVA, descr[2]));
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methodsToSpecialize.add(cha.resolveMethod(ref).getReference());
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break;
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}
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// loader name, classname, meaning all methods of that class
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case 2: {
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IClass klass = cha.lookupClass(TypeReference.findOrCreate(new ClassLoaderReference(Atom.findOrCreateUnicodeAtom(descr[0]),
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ClassLoaderReference.Java, null), TypeName.string2TypeName(descr[1])));
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for (IMethod M : klass.getDeclaredMethods()) {
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methodsToSpecialize.add(M.getReference());
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}
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break;
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}
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// classname, meaning all methods of that class
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case 1: {
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IClass klass = cha.lookupClass(TypeReference.findOrCreate(ClassLoaderReference.Application, TypeName.string2TypeName(descr[0])));
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for (IMethod M : klass.getDeclaredMethods()) {
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methodsToSpecialize.add(M.getReference());
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}
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break;
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}
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default:
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Assertions.UNREACHABLE();
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}
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}
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System.err.println(("hacking context selector for methods " + methodsToSpecialize));
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}
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@Override
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public Context getCalleeTarget(CGNode caller, CallSiteReference site, IMethod callee, InstanceKey[] receiver) {
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if (methodsToSpecialize.contains(site.getDeclaredTarget()) || methodsToSpecialize.contains(callee.getReference())) {
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return specialPolicy.getCalleeTarget(caller, site, callee, receiver);
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} else {
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return basePolicy.getCalleeTarget(caller, site, callee, receiver);
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}
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}
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@Override
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public IntSet getRelevantParameters(CGNode caller, CallSiteReference site) {
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return specialPolicy.getRelevantParameters(caller, site).union(basePolicy.getRelevantParameters(caller, site));
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}
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}
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