/projects/netbeans-7.3/nbbuild/antsrc/org/netbeans/nbbuild/VerifyClassLinkage.java
Java | 367 lines | 250 code | 18 blank | 99 comment | 59 complexity | 6241e1d27ba8fc988df4ea20a7824aab MD5 | raw file
- /*
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
- *
- * Copyright 1997-2010 Oracle and/or its affiliates. All rights reserved.
- *
- * Oracle and Java are registered trademarks of Oracle and/or its affiliates.
- * Other names may be trademarks of their respective owners.
- *
- * The contents of this file are subject to the terms of either the GNU
- * General Public License Version 2 only ("GPL") or the Common
- * Development and Distribution License("CDDL") (collectively, the
- * "License"). You may not use this file except in compliance with the
- * License. You can obtain a copy of the License at
- * http://www.netbeans.org/cddl-gplv2.html
- * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
- * specific language governing permissions and limitations under the
- * License. When distributing the software, include this License Header
- * Notice in each file and include the License file at
- * nbbuild/licenses/CDDL-GPL-2-CP. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the GPL Version 2 section of the License file that
- * accompanied this code. If applicable, add the following below the
- * License Header, with the fields enclosed by brackets [] replaced by
- * your own identifying information:
- * "Portions Copyrighted [year] [name of copyright owner]"
- *
- * Contributor(s):
- *
- * The Original Software is NetBeans. The Initial Developer of the Original
- * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
- * Microsystems, Inc. All Rights Reserved.
- *
- * If you wish your version of this file to be governed by only the CDDL
- * or only the GPL Version 2, indicate your decision by adding
- * "[Contributor] elects to include this software in this distribution
- * under the [CDDL or GPL Version 2] license." If you do not indicate a
- * single choice of license, a recipient has the option to distribute
- * your version of this file under either the CDDL, the GPL Version 2 or
- * to extend the choice of license to its licensees as provided above.
- * However, if you add GPL Version 2 code and therefore, elected the GPL
- * Version 2 license, then the option applies only if the new code is
- * made subject to such option by the copyright holder.
- */
- package org.netbeans.nbbuild;
- import java.io.ByteArrayInputStream;
- import java.io.ByteArrayOutputStream;
- import java.io.DataInput;
- import java.io.DataInputStream;
- import java.io.File;
- import java.io.IOException;
- import java.io.InputStream;
- import java.util.Arrays;
- import java.util.Collections;
- import java.util.Enumeration;
- import java.util.HashMap;
- import java.util.HashSet;
- import java.util.Map;
- import java.util.Set;
- import java.util.TreeMap;
- import java.util.TreeSet;
- import java.util.concurrent.atomic.AtomicInteger;
- import java.util.jar.Attributes;
- import java.util.jar.JarEntry;
- import java.util.jar.JarFile;
- import java.util.jar.Manifest;
- import java.util.regex.Pattern;
- import org.apache.tools.ant.AntClassLoader;
- import org.apache.tools.ant.BuildException;
- import org.apache.tools.ant.Project;
- import org.apache.tools.ant.Task;
- import org.apache.tools.ant.types.Path;
- /**
- * Verifies linkage between classes in a JAR (typically a module).
- * @author Jesse Glick
- * @see "#71675"
- * @see <a href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html">Class file spec</a>
- */
- //-------------------------
- //jglick: when considering rewrites please check https://github.com/jenkinsci/constant-pool-scanner
- //-------------------------
- public class VerifyClassLinkage extends Task {
- public VerifyClassLinkage() {}
- /*
- private boolean verifyMainJar = true;
- private boolean verifyClassPathExtensions = true;
- public void setVerifyClassPathExtensions(boolean verifyClassPathExtensions) {
- this.verifyClassPathExtensions = verifyClassPathExtensions;
- }
- public void setVerifyMainJar(boolean verifyMainJar) {
- this.verifyMainJar = verifyMainJar;
- }
- */
- private File jar;
- private boolean failOnError = true;
- private boolean warnOnDefaultPackage = true;
- private Path classpath = new Path(getProject());
- private String ignores;
- private int maxWarnings = Integer.MAX_VALUE;
- /**
- * Intended static classpath for this JAR.
- * Any classes loaded in this JAR (and its Class-Path extensions)
- * must be linkable against this classpath plus the JAR (and extensions) itself.
- */
- public Path createClasspath() {
- return classpath.createPath();
- }
- /**
- * Specify the main JAR file.
- * Automatically searches in Class-Path extensions too.
- */
- public void setJar(File jar) {
- this.jar = jar;
- }
- /**
- * If true (default), halt build on error, rather than just
- * reporting a warning.
- */
- public void setFailOnError(boolean failOnError) {
- this.failOnError = failOnError;
- }
- /**
- * Sets the pattern for classes that are not verified.
- * Allows to skip linkage verification of some classes.
- */
- public void setIgnores(String ignores) {
- this.ignores = ignores;
- }
- /**
- * If true (default), warn if any classes are found in the default
- * package. Never halts the build even if {@link #setFailOnError} true.
- */
- public void setWarnOnDefaultPackage(boolean warnOnDefaultPackage) {
- this.warnOnDefaultPackage = warnOnDefaultPackage;
- }
- /**
- * Limit the number of warnings that will be generated in one task run.
- * If there are more warnings than this, they will not be reported.
- */
- public void setMaxWarnings(int maxWarnings) {
- if (maxWarnings <= 0) {
- throw new IllegalArgumentException();
- }
- this.maxWarnings = maxWarnings;
- }
- public @Override void execute() throws BuildException {
- if (jar == null) {
- throw new BuildException("Must specify a JAR file", getLocation());
- }
- try {
- // Map from class name (foo/Bar format) to true (found), false (not found), null (as yet unknown):
- Map<String,Boolean> loadable = new HashMap<String,Boolean>();
- Map<String,byte[]> classfiles = new TreeMap<String,byte[]>();
- JarFile jf = new JarFile(jar);
- try {
- read(jf, classfiles, new HashSet<File>(Collections.singleton(jar)), this, ignores);
- } finally {
- jf.close();
- }
- for (String clazz: classfiles.keySet()) {
- // All classes we define are obviously loadable:
- loadable.put(clazz, Boolean.TRUE);
- if (warnOnDefaultPackage && clazz.indexOf('.') == -1) {
- log("Warning: class '" + clazz + "' found in default package", Project.MSG_WARN);
- }
- }
- // XXX should use a load-nothing parent and require nbjdk.bootclasspath to be added explicitly to CP
- // otherwise e.g. libs.jsr223 dep can be removed from contrib/java.hints.scripting without warning if building on JDK 6
- ClassLoader loader = new AntClassLoader(ClassLoader.getSystemClassLoader().getParent(), getProject(), classpath, true);
- AtomicInteger max = new AtomicInteger(maxWarnings);
- for (Map.Entry<String, byte[]> entry: classfiles.entrySet()) {
- String clazz = entry.getKey();
- byte[] data = entry.getValue();
- verify(clazz, data, loadable, loader, max);
- if (max.get() < 0) {
- break;
- }
- }
- } catch (IOException e) {
- throw new BuildException("While verifying " + jar + " or its Class-Path extensions: " + e, e, getLocation());
- }
- }
- static void read(JarFile jf, Map<String, byte[]> classfiles, Set<File> alreadyRead, Task task, String ignores) throws IOException {
- File jar = new File(jf.getName());
- task.log("Reading " + jar, Project.MSG_VERBOSE);
- Pattern p = (ignores != null)? Pattern.compile(ignores): null;
- Enumeration<JarEntry> e = jf.entries();
- while (e.hasMoreElements()) {
- JarEntry entry = e.nextElement();
- String name = entry.getName();
- if (!name.endsWith(".class")) {
- continue;
- }
- String clazz = name.substring(0, name.length() - 6).replace('/', '.');
- if (p != null && p.matcher(clazz).matches()) {
- continue;
- }
- ByteArrayOutputStream baos = new ByteArrayOutputStream(Math.max((int) entry.getSize(), 0));
- InputStream is = jf.getInputStream(entry);
- try {
- byte[] buf = new byte[4096];
- int read;
- while ((read = is.read(buf)) != -1) {
- baos.write(buf, 0, read);
- }
- } finally {
- is.close();
- }
- classfiles.put(clazz, baos.toByteArray());
- }
- Manifest mf = jf.getManifest();
- if (mf != null) {
- String cp = mf.getMainAttributes().getValue(Attributes.Name.CLASS_PATH);
- if (cp != null) {
- String[] uris = cp.trim().split("[, ]+");
- for (int i = 0; i < uris.length; i++) {
- File otherJar = new File(jar.toURI().resolve(uris[i]));
- if (alreadyRead.add(otherJar)) {
- if (otherJar.isFile()) {
- JarFile otherJF = new JarFile(otherJar);
- try {
- read(otherJF, classfiles, alreadyRead, task, ignores);
- } finally {
- otherJF.close();
- }
- }
- } else {
- task.log("Already read " + jar, Project.MSG_VERBOSE);
- }
- }
- }
- }
- }
- private void verify(String clazz, byte[] data, Map<String,Boolean> loadable, ClassLoader loader, AtomicInteger maxWarn)
- throws IOException, BuildException {
- //log("Verifying linkage of " + clazz.replace('/', '.'), Project.MSG_DEBUG);
- Set<String> dependencies = dependencies(data);
- //System.err.println(clazz + " -> " + dependencies);
- for (String clazz2 : dependencies) {
- Boolean exists = loadable.get(clazz2);
- if (exists == null) {
- exists = loader.getResource(clazz2.replace('.', '/') + ".class") != null;
- loadable.put(clazz2, exists);
- }
- if (!exists) {
- String message = clazz + " cannot access " + clazz2;
- if (failOnError) {
- throw new BuildException(message, getLocation());
- } else if (maxWarn.getAndDecrement() > 0) {
- log("Warning: " + message, Project.MSG_WARN);
- } else {
- log("(additional warnings not reported)", Project.MSG_WARN);
- return;
- }
- } else {
- //log("Working reference to " + clazz2, Project.MSG_DEBUG);
- }
- }
- }
-
- private static void skip(DataInput input, int bytes) throws IOException {
- int skipped = input.skipBytes(bytes);
- if (skipped != bytes) {
- throw new IOException("Truncated class file");
- }
- }
- static Set<String> dependencies(byte[] data) throws IOException {
- Set<String> result = new TreeSet<String>();
- DataInput input = new DataInputStream(new ByteArrayInputStream(data));
- skip(input, 8); // magic, minor_version, major_version
- int size = input.readUnsignedShort() - 1; // constantPoolCount
- String[] utf8Strings = new String[size];
- boolean[] isClassName = new boolean[size];
- boolean[] isDescriptor = new boolean[size];
- for (int i = 0; i < size; i++) {
- byte tag = input.readByte();
- switch (tag) {
- case 1: // CONSTANT_Utf8
- utf8Strings[i] = input.readUTF();
- break;
- case 7: // CONSTANT_Class
- int index = input.readUnsignedShort() - 1;
- if (index >= size) {
- throw new IOException("@" + i + ": CONSTANT_Class_info.name_index " + index + " too big for size of pool " + size);
- }
- //log("Class reference at " + index, Project.MSG_DEBUG);
- isClassName[index] = true;
- break;
- case 3: // CONSTANT_Integer
- case 4: // CONSTANT_Float
- case 9: // CONSTANT_Fieldref
- case 10: // CONSTANT_Methodref
- case 11: // CONSTANT_InterfaceMethodref
- skip(input, 4);
- break;
- case 12: // CONSTANT_NameAndType
- skip(input, 2);
- index = input.readUnsignedShort() - 1;
- if (index >= size || index < 0) {
- throw new IOException("@" + i + ": CONSTANT_NameAndType_info.descriptor_index " + index + " too big for size of pool " + size);
- }
- isDescriptor[index] = true;
- break;
- case 8: // CONSTANT_String
- skip(input, 2);
- break;
- case 5: // CONSTANT_Long
- case 6: // CONSTANT_Double
- skip(input, 8);
- i++; // weirdness in spec
- break;
- default:
- throw new IOException("Unrecognized constant pool tag " + tag + " at index " + i +
- "; running UTF-8 strings: " + Arrays.asList(utf8Strings));
- }
- }
- //task.log("UTF-8 strings: " + Arrays.asList(utf8Strings), Project.MSG_DEBUG);
- for (int i = 0; i < size; i++) {
- String s = utf8Strings[i];
- if (isClassName[i]) {
- while (s.charAt(0) == '[') {
- // array type
- s = s.substring(1);
- }
- if (s.length() == 1) {
- // primitive
- continue;
- }
- String c;
- if (s.charAt(s.length() - 1) == ';' && s.charAt(0) == 'L') {
- // Uncommon but seems sometimes this happens.
- c = s.substring(1, s.length() - 1);
- } else {
- c = s;
- }
- result.add(c.replace('/', '.'));
- } else if (isDescriptor[i]) {
- int idx = 0;
- while ((idx = s.indexOf('L', idx)) != -1) {
- int semi = s.indexOf(';', idx);
- if (semi == -1) {
- throw new IOException("Invalid type or descriptor: " + s);
- }
- result.add(s.substring(idx + 1, semi).replace('/', '.'));
- idx = semi;
- }
- }
- }
- return result;
- }
- }