120 lines
3.8 KiB
Java
120 lines
3.8 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.ipa.callgraph.propagation.cfa;
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import com.ibm.wala.classLoader.CallSiteReference;
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import com.ibm.wala.classLoader.IMethod;
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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.ContextItem;
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import com.ibm.wala.ipa.callgraph.ContextKey;
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import com.ibm.wala.ipa.callgraph.ContextSelector;
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import com.ibm.wala.ipa.callgraph.impl.Everywhere;
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import com.ibm.wala.ipa.callgraph.propagation.InstanceKey;
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import com.ibm.wala.util.intset.IntSet;
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public abstract class CallStringContextSelector implements ContextSelector {
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public static final ContextKey CALL_STRING = new ContextKey() {
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@Override
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public String toString() {
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return "CALL_STRING_KEY";
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}
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};
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public static class CallStringContextPair implements Context {
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private final CallString cs;
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private final Context base;
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public CallStringContextPair(CallString cs, Context base) {
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this.cs = cs;
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this.base = base;
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}
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@Override
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public boolean equals(Object o) {
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return (o instanceof CallStringContextPair) && ((CallStringContextPair) o).cs.equals(cs)
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&& ((CallStringContextPair) o).base.equals(base);
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}
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@Override
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public String toString() {
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return "CallStringContextPair: " + cs.toString() + ":" + base.toString();
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}
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@Override
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public int hashCode() {
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return cs.hashCode() * base.hashCode();
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}
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@Override
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public ContextItem get(ContextKey name) {
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if (CALL_STRING.equals(name)) {
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return cs;
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} else {
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return base.get(name);
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}
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}
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public Context getBaseContext() {
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return base;
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}
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public CallString getCallString() {
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return cs;
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}
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}
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protected final ContextSelector base;
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public CallStringContextSelector(ContextSelector base) {
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this.base = base;
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}
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protected abstract int getLength(CGNode caller, CallSiteReference site, IMethod target);
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protected CallString getCallString(CGNode caller, CallSiteReference site, IMethod target) {
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int length = getLength(caller, site, target);
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if (length > 0) {
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if (caller.getContext().get(CALL_STRING) != null) {
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return new CallString(site, caller.getMethod(), length, (CallString) caller.getContext().get(CALL_STRING));
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} else {
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return new CallString(site, caller.getMethod());
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}
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} else {
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return null;
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}
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}
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/*
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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, com.ibm.wala.ipa.callgraph.propagation.InstanceKey)
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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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Context baseContext = base.getCalleeTarget(caller, site, callee, receiver);
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CallString cs = getCallString(caller, site, callee);
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if (cs == null) {
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return baseContext;
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} else if (baseContext == Everywhere.EVERYWHERE) {
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return new CallStringContext(cs);
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} else {
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return new CallStringContextPair(cs, baseContext);
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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 base.getRelevantParameters(caller, site);
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}
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}
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