183 lines
5.7 KiB
Java
183 lines
5.7 KiB
Java
/******************************************************************************
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* Copyright (c) 2009 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.loader;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.io.PrintWriter;
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import java.util.Iterator;
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import java.util.LinkedHashSet;
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import java.util.List;
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import java.util.Set;
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import com.ibm.wala.cast.ir.translator.TranslatorToCAst;
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import com.ibm.wala.cast.ir.translator.TranslatorToIR;
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import com.ibm.wala.cast.tree.CAst;
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import com.ibm.wala.cast.tree.CAstEntity;
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import com.ibm.wala.cast.tree.impl.CAstImpl;
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import com.ibm.wala.cast.util.CAstPrinter;
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import com.ibm.wala.classLoader.IClassLoader;
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import com.ibm.wala.classLoader.Module;
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import com.ibm.wala.classLoader.ModuleEntry;
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import com.ibm.wala.classLoader.SourceFileModule;
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import com.ibm.wala.classLoader.SourceModule;
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import com.ibm.wala.ipa.cha.IClassHierarchy;
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import com.ibm.wala.types.TypeName;
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import com.ibm.wala.util.collections.Pair;
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import com.ibm.wala.util.io.TemporaryFile;
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import com.ibm.wala.util.warnings.Warning;
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/**
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* abstract class loader that performs CAst and IR generation for relevant
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* entities in a list of {@link Module}s. Subclasses provide the CAst / IR
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* translators appropriate for the language.
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*
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*/
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public abstract class CAstAbstractModuleLoader extends CAstAbstractLoader {
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private static final boolean DEBUG = false;
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public CAstAbstractModuleLoader(IClassHierarchy cha, IClassLoader parent) {
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super(cha, parent);
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}
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public CAstAbstractModuleLoader(IClassHierarchy cha) {
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this(cha, null);
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}
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/**
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* create the appropriate CAst translator for the language and source module
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*/
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protected abstract TranslatorToCAst getTranslatorToCAst(CAst ast, ModuleEntry M) throws IOException;
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/**
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* should IR be generated for entity?
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*/
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protected abstract boolean shouldTranslate(CAstEntity entity);
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/**
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* create the appropriate IR translator for the language
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*/
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protected abstract TranslatorToIR initTranslator();
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protected File getLocalFile(SourceModule M) throws IOException {
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if (M instanceof SourceFileModule) {
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return ((SourceFileModule) M).getFile();
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} else {
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File f = File.createTempFile("module", ".txt");
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f.deleteOnExit();
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TemporaryFile.streamToFile(f, M.getInputStream());
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return f;
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}
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}
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/**
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* subclasses should override to perform actions after CAst and IR have been
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* generated. by default, do nothing
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*/
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protected void finishTranslation() {
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}
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@Override
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public void init(final List<Module> modules) {
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final CAst ast = new CAstImpl();
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// convert everything to CAst
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final Set<Pair<CAstEntity, ModuleEntry>> topLevelEntities = new LinkedHashSet<>();
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for (Module module : modules) {
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translateModuleToCAst(module, ast, topLevelEntities);
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}
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// generate IR as needed
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final TranslatorToIR xlatorToIR = initTranslator();
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for (Pair<CAstEntity, ModuleEntry> p : topLevelEntities) {
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if (shouldTranslate(p.fst)) {
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xlatorToIR.translate(p.fst, p.snd);
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}
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}
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if (DEBUG) {
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for (TypeName tn : types.keySet()) {
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try {
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System.err.println(("found type " + tn + " : " + types.get(tn) + " < " + types.get(tn).getSuperclass()));
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} catch (Exception e) {
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System.err.println(e);
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}
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}
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}
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finishTranslation();
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}
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/**
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* translate moduleEntry to CAst and store result in topLevelEntities
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*
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* @param ast
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* @param topLevelEntities
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*/
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private void translateModuleEntryToCAst(ModuleEntry moduleEntry, CAst ast, Set<Pair<CAstEntity, ModuleEntry>> topLevelEntities) {
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try {
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if (moduleEntry.isModuleFile()) {
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// nested module
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translateModuleToCAst(moduleEntry.asModule(), ast, topLevelEntities);
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} else {
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TranslatorToCAst xlatorToCAst = getTranslatorToCAst(ast, moduleEntry);
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CAstEntity fileEntity = null;
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try {
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fileEntity = xlatorToCAst.translateToCAst();
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if (DEBUG) {
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CAstPrinter.printTo(fileEntity, new PrintWriter(System.err));
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}
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topLevelEntities.add(Pair.make(fileEntity, moduleEntry));
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} catch (TranslatorToCAst.Error e) {
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addMessage(moduleEntry, e.warning);
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}
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}
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} catch (final IOException e) {
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addMessage(moduleEntry, new Warning(Warning.SEVERE) {
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@Override
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public String getMsg() {
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return "I/O issue: " + e.getMessage();
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}
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});
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} catch (final RuntimeException e) {
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final ByteArrayOutputStream s = new ByteArrayOutputStream();
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PrintStream ps = new PrintStream(s);
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e.printStackTrace(ps);
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addMessage(moduleEntry, new Warning(Warning.SEVERE) {
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@Override
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public String getMsg() {
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return "Parsing issue: " + new String(s.toByteArray());
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}
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});
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}
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}
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/**
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* translate all relevant entities in the module to CAst, storing the results
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* in topLevelEntities
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*/
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private void translateModuleToCAst(Module module, CAst ast, Set<Pair<CAstEntity, ModuleEntry>> topLevelEntities) {
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for (Iterator<? extends ModuleEntry> mes = module.getEntries(); mes.hasNext();) {
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translateModuleEntryToCAst(mes.next(), ast, topLevelEntities);
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}
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}
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}
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