206 lines
8.3 KiB
Java
Executable File
206 lines
8.3 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 java.io.IOException;
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import java.io.PrintWriter;
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import java.net.URL;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.Set;
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import com.ibm.wala.cast.ipa.callgraph.StandardFunctionTargetSelector;
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import com.ibm.wala.cast.ir.translator.TranslatorToCAst;
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import com.ibm.wala.cast.ir.translator.TranslatorToCAst.Error;
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import com.ibm.wala.cast.js.loader.JavaScriptLoader;
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import com.ibm.wala.cast.js.loader.JavaScriptLoaderFactory;
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import com.ibm.wala.cast.js.translator.JSAstTranslator;
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import com.ibm.wala.cast.js.translator.JavaScriptTranslatorFactory;
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import com.ibm.wala.cast.js.types.JavaScriptMethods;
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import com.ibm.wala.cast.js.types.JavaScriptTypes;
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import com.ibm.wala.cast.loader.AstMethod.DebuggingInformation;
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import com.ibm.wala.cast.tree.CAstEntity;
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import com.ibm.wala.cast.tree.CAstNode;
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import com.ibm.wala.cast.tree.impl.CAstImpl;
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import com.ibm.wala.cast.tree.rewrite.CAstRewriterFactory;
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import com.ibm.wala.cast.tree.visit.CAstVisitor;
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import com.ibm.wala.cast.types.AstMethodReference;
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import com.ibm.wala.cast.util.CAstPrinter;
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import com.ibm.wala.cfg.AbstractCFG;
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import com.ibm.wala.classLoader.ClassLoaderFactory;
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import com.ibm.wala.classLoader.IClass;
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import com.ibm.wala.classLoader.SourceURLModule;
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import com.ibm.wala.ipa.callgraph.AnalysisScope;
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import com.ibm.wala.ipa.callgraph.CGNode;
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import com.ibm.wala.ipa.callgraph.CallGraph;
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import com.ibm.wala.ipa.callgraph.Entrypoint;
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import com.ibm.wala.ipa.cha.ClassHierarchy;
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import com.ibm.wala.ipa.cha.ClassHierarchyException;
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import com.ibm.wala.ipa.cha.IClassHierarchy;
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import com.ibm.wala.ssa.SymbolTable;
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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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public class JSCallGraphUtil extends com.ibm.wala.cast.ipa.callgraph.CAstCallGraphUtil {
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private static final boolean DEBUG = false;
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/**
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* the translator factory to be used for analysis TODO: pass the factory where
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* needed instead of using a global?
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*/
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public static JavaScriptTranslatorFactory translatorFactory;
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/**
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* preprocessor to run generated CAst trees through, null if none
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*/
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public static CAstRewriterFactory preprocessor;
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/**
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* Set up the translator factory. This method should be called before invoking
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* {@link #makeLoaders()}.
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*/
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public static void setTranslatorFactory(JavaScriptTranslatorFactory translatorFactory) {
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JSCallGraphUtil.translatorFactory = translatorFactory;
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}
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public static JavaScriptTranslatorFactory getTranslatorFactory() {
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return translatorFactory;
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}
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public static void setPreprocessor(CAstRewriterFactory preprocessor) {
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JSCallGraphUtil.preprocessor = preprocessor;
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}
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public static JSAnalysisOptions makeOptions(AnalysisScope scope, IClassHierarchy cha, Iterable<Entrypoint> roots) {
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final JSAnalysisOptions options = new JSAnalysisOptions(scope, /*
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* AstIRFactory.
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* makeDefaultFactory
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* (keepIRs),
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*/roots);
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com.ibm.wala.ipa.callgraph.impl.Util.addDefaultSelectors(options, cha);
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options.setSelector(new StandardFunctionTargetSelector(cha, options.getMethodTargetSelector()));
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options.setUseConstantSpecificKeys(true);
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options.setUseStacksForLexicalScoping(true);
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return options;
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}
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public static JavaScriptLoaderFactory makeLoaders() {
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if (translatorFactory == null) {
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throw new IllegalStateException("com.ibm.wala.cast.js.ipa.callgraph.Util.setTranslatorFactory() must be invoked before makeLoaders()");
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}
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return new JavaScriptLoaderFactory(translatorFactory, preprocessor);
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}
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public static IClassHierarchy makeHierarchy(AnalysisScope scope, ClassLoaderFactory loaders) throws ClassHierarchyException {
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return ClassHierarchy.make(scope, loaders, JavaScriptLoader.JS);
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}
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public static Iterable<Entrypoint> makeScriptRoots(IClassHierarchy cha) {
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return new JavaScriptEntryPoints(cha, cha.getLoader(JavaScriptTypes.jsLoader));
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}
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/**
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* Get all the nodes in CG with name funName. If funName is of the form
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* <code>"ctor:nm"</code>, return nodes corresponding to constructor function
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* for <code>nm</code>. If funName is of the form <code>"suffix:nm"</code>,
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* return nodes corresponding to functions whose names end with
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* <code>nm</code>. Otherwise, return nodes for functions whose name matches
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* funName exactly.
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*/
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public static Collection<CGNode> getNodes(CallGraph CG, String funName) {
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boolean ctor = funName.startsWith("ctor:");
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boolean suffix = funName.startsWith("suffix:");
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if (ctor) {
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TypeReference TR = TypeReference.findOrCreate(JavaScriptTypes.jsLoader, TypeName.string2TypeName("L" + funName.substring(5)));
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MethodReference MR = JavaScriptMethods.makeCtorReference(TR);
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return CG.getNodes(MR);
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} else if (suffix) {
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Set<CGNode> nodes = new HashSet<CGNode>();
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String tail = funName.substring(7);
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for (CGNode n : CG) {
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if (n.getMethod().getReference().getDeclaringClass().getName().toString().endsWith(tail)) {
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nodes.add(n);
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}
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}
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return nodes;
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} else {
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TypeReference TR = TypeReference.findOrCreate(JavaScriptTypes.jsLoader, TypeName.string2TypeName("L" + funName));
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MethodReference MR = AstMethodReference.fnReference(TR);
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return CG.getNodes(MR);
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}
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}
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/**
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* @param cha
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* @param cl
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* @param fileName
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* @param url
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* @return The set of class names that where defined in the CHA as a result
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* loading process.
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* @throws IOException
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*/
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public static Set<String> loadAdditionalFile(IClassHierarchy cha, JavaScriptLoader cl, String fileName, URL url)
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throws IOException {
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try {
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SourceURLModule M = new SourceURLModule(url);
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TranslatorToCAst toCAst = getTranslatorFactory().make(new CAstImpl(), M);
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final Set<String> names = new HashSet<String>();
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JSAstTranslator toIR = new JSAstTranslator(cl) {
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@Override
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protected void defineFunction(CAstEntity N, WalkContext definingContext, AbstractCFG cfg, SymbolTable symtab,
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boolean hasCatchBlock, TypeReference[][] caughtTypes, boolean hasMonitorOp, AstLexicalInformation LI,
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DebuggingInformation debugInfo) {
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String fnName = "L" + composeEntityName(definingContext, N);
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names.add(fnName);
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super.defineFunction(N, definingContext, cfg, symtab, hasCatchBlock, caughtTypes, hasMonitorOp, LI, debugInfo);
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}
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@Override
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protected void leaveFunctionStmt(CAstNode n, WalkContext c, CAstVisitor<WalkContext> visitor) {
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CAstEntity fn = (CAstEntity) n.getChild(0).getValue();
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Scope cs = c.currentScope();
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if (!cs.contains(fn.getName())
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|| cs.lookup(fn.getName()).getDefiningScope().getEntity().getKind() == CAstEntity.SCRIPT_ENTITY) {
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int result = processFunctionExpr(n, c);
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assignValue(n, c, cs.lookup(fn.getName()), fn.getName(), result);
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} else {
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super.leaveFunctionStmt(n, c, visitor);
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}
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}
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};
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CAstEntity tree;
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try {
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tree = toCAst.translateToCAst();
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if (DEBUG) {
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CAstPrinter.printTo(tree, new PrintWriter(System.err));
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}
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toIR.translate(tree, M);
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for (String name : names) {
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IClass fcls = cl.lookupClass(name, cha);
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cha.addClass(fcls);
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}
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return names;
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} catch (Error e) {
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return Collections.emptySet();
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}
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} catch (RuntimeException e) {
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return Collections.emptySet();
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}
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}
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}
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