122 lines
5.4 KiB
Java
Executable File
122 lines
5.4 KiB
Java
Executable File
/******************************************************************************
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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 com.ibm.wala.cast.ipa.callgraph.OneLevelForLexicalAccessFunctions;
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import com.ibm.wala.ipa.callgraph.AnalysisCache;
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import com.ibm.wala.ipa.callgraph.AnalysisScope;
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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.impl.ContextInsensitiveSelector;
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import com.ibm.wala.ipa.callgraph.impl.DelegatingContextSelector;
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import com.ibm.wala.ipa.callgraph.propagation.SSAContextInterpreter;
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import com.ibm.wala.ipa.callgraph.propagation.cfa.DelegatingSSAContextInterpreter;
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import com.ibm.wala.ipa.callgraph.propagation.cfa.ZeroXInstanceKeys;
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import com.ibm.wala.ipa.callgraph.propagation.cfa.nCFAContextSelector;
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import com.ibm.wala.ipa.cha.IClassHierarchy;
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/**
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* 0-x-CFA Call graph builder, optimized to not disambiguate instances of
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* "uninteresting" types
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*/
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public class JSZeroOrOneXCFABuilder extends JSCFABuilder {
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private static final boolean USE_OBJECT_SENSITIVITY = false;
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public JSZeroOrOneXCFABuilder(IClassHierarchy cha, JSAnalysisOptions options, AnalysisCache cache,
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ContextSelector appContextSelector, SSAContextInterpreter appContextInterpreter, int instancePolicy, boolean doOneCFA) {
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super(cha, options, cache);
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SSAContextInterpreter contextInterpreter = setupSSAContextInterpreter(cha, options, cache, appContextInterpreter);
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setupMethodTargetSelector(cha, options);
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setupContextSelector(options, appContextSelector, doOneCFA);
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setInstanceKeys(new JavaScriptScopeMappingInstanceKeys(cha, this, new JavaScriptConstructorInstanceKeys(new ZeroXInstanceKeys(
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options, cha, contextInterpreter, instancePolicy))));
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}
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private void setupContextSelector(JSAnalysisOptions options, ContextSelector appContextSelector, boolean doOneCFA) {
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// baseline selector
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ContextSelector def = new ContextInsensitiveSelector();
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ContextSelector contextSelector = appContextSelector == null ? def : new DelegatingContextSelector(appContextSelector, def);
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// JavaScriptConstructorContextSelector ensures at least a 0-1-CFA (i.e.,
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// Andersen's-style) heap abstraction. This level of heap abstraction is
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// _necessary_ for correctness (we rely on it when handling lexical scoping)
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contextSelector = new JavaScriptConstructorContextSelector(contextSelector);
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//contextSelector = new OneLevelForLexicalAccessFunctions(contextSelector);
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if (USE_OBJECT_SENSITIVITY) {
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contextSelector = new ObjectSensitivityContextSelector(contextSelector);
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}
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if (options.handleCallApply()) {
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contextSelector = new JavaScriptFunctionApplyContextSelector(contextSelector);
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}
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if (doOneCFA) {
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contextSelector = new nCFAContextSelector(1, contextSelector);
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}
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setContextSelector(contextSelector);
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}
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private void setupMethodTargetSelector(IClassHierarchy cha, JSAnalysisOptions options) {
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MethodTargetSelector targetSelector = new JavaScriptConstructTargetSelector(cha, options
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.getMethodTargetSelector());
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if (options.handleCallApply()) {
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targetSelector = new JavaScriptFunctionApplyTargetSelector(new JavaScriptFunctionDotCallTargetSelector(targetSelector));
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}
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if (options.useLoadFileTargetSelector()) {
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targetSelector = new LoadFileTargetSelector(targetSelector, this);
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}
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options.setSelector(targetSelector);
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}
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private SSAContextInterpreter setupSSAContextInterpreter(IClassHierarchy cha, JSAnalysisOptions options, AnalysisCache cache,
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SSAContextInterpreter appContextInterpreter) {
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SSAContextInterpreter contextInterpreter = makeDefaultContextInterpreters(appContextInterpreter, options, cha);
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if (options.handleCallApply()) {
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contextInterpreter = new DelegatingSSAContextInterpreter(new JavaScriptFunctionApplyContextInterpreter(options, cache),
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contextInterpreter);
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}
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setContextInterpreter(contextInterpreter);
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return contextInterpreter;
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}
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/**
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* @param options
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* options that govern call graph construction
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* @param cha
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* governing class hierarchy
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* @param cl
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* classloader that can find DOMO resources
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* @param scope
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* representation of the analysis scope
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* @param xmlFiles
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* set of Strings that are names of XML files holding bypass logic
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* specifications.
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* @return a 0-1-Opt-CFA Call Graph Builder.
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*/
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public static JSCFABuilder make(JSAnalysisOptions options, AnalysisCache cache, IClassHierarchy cha, ClassLoader cl,
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AnalysisScope scope, String[] xmlFiles, byte instancePolicy, boolean doOneCFA) {
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com.ibm.wala.ipa.callgraph.impl.Util.addDefaultSelectors(options, cha);
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for (int i = 0; i < xmlFiles.length; i++) {
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com.ibm.wala.ipa.callgraph.impl.Util.addBypassLogic(options, scope, cl, xmlFiles[i], cha);
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}
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return new JSZeroOrOneXCFABuilder(cha, options, cache, null, null, instancePolicy, doOneCFA);
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}
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}
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