| /* |
| * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nashorn.internal.tools.nasgen; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import jdk.internal.org.objectweb.asm.ClassReader; |
| import jdk.internal.org.objectweb.asm.ClassWriter; |
| import jdk.internal.org.objectweb.asm.util.CheckClassAdapter; |
| |
| /** |
| * Main class for the "nasgen" tool. |
| * |
| */ |
| public class Main { |
| private static final boolean DEBUG = Boolean.getBoolean("nasgen.debug"); |
| |
| private interface ErrorReporter { |
| public void error(String msg); |
| } |
| |
| /** |
| * Public entry point for Nasgen if invoked from command line. Nasgen takes three arguments |
| * in order: input directory, package list, output directory |
| * |
| * @param args argument vector |
| */ |
| public static void main(final String[] args) { |
| final ErrorReporter reporter = new ErrorReporter() { |
| @Override |
| public void error(final String msg) { |
| Main.error(msg, 1); |
| } |
| }; |
| if (args.length == 3) { |
| processAll(args[0], args[1], args[2], reporter); |
| } else { |
| error("Usage: nasgen <input-dir> <package-list> <output-dir>", 1); |
| } |
| } |
| |
| private static void processAll(final String in, final String pkgList, final String out, final ErrorReporter reporter) { |
| final File inDir = new File(in); |
| if (!inDir.exists() || !inDir.isDirectory()) { |
| reporter.error(in + " does not exist or not a directory"); |
| return; |
| } |
| |
| final File outDir = new File(out); |
| if (!outDir.exists() || !outDir.isDirectory()) { |
| reporter.error(out + " does not exist or not a directory"); |
| return; |
| } |
| |
| final String[] packages = pkgList.split(":"); |
| for (String pkg : packages) { |
| pkg = pkg.replace('.', File.separatorChar); |
| final File dir = new File(inDir, pkg); |
| final File[] classes = dir.listFiles(); |
| for (final File clazz : classes) { |
| if (clazz.isFile() && clazz.getName().endsWith(".class")) { |
| if (! process(clazz, new File(outDir, pkg), reporter)) { |
| return; |
| } |
| } |
| } |
| } |
| } |
| |
| private static boolean process(final File inFile, final File outDir, final ErrorReporter reporter) { |
| try { |
| byte[] buf = new byte[(int)inFile.length()]; |
| |
| try (FileInputStream fin = new FileInputStream(inFile)) { |
| fin.read(buf); |
| } |
| |
| final ScriptClassInfo sci = ClassGenerator.getScriptClassInfo(buf); |
| |
| if (sci != null) { |
| try { |
| sci.verify(); |
| } catch (final Exception e) { |
| reporter.error(e.getMessage()); |
| return false; |
| } |
| |
| // create necessary output package dir |
| outDir.mkdirs(); |
| |
| // instrument @ScriptClass |
| final ClassWriter writer = ClassGenerator.makeClassWriter(); |
| final ClassReader reader = new ClassReader(buf); |
| final ScriptClassInstrumentor inst = new ScriptClassInstrumentor(writer, sci); |
| reader.accept(inst, 0); |
| //noinspection UnusedAssignment |
| |
| // write instrumented class |
| try (FileOutputStream fos = new FileOutputStream(new File(outDir, inFile.getName()))) { |
| buf = writer.toByteArray(); |
| if (DEBUG) { |
| verify(buf); |
| } |
| fos.write(buf); |
| } |
| |
| // simple class name without package prefix |
| String simpleName = inFile.getName(); |
| simpleName = simpleName.substring(0, simpleName.indexOf(".class")); |
| |
| if (sci.isPrototypeNeeded()) { |
| // generate prototype class |
| final PrototypeGenerator protGen = new PrototypeGenerator(sci); |
| buf = protGen.getClassBytes(); |
| if (DEBUG) { |
| verify(buf); |
| } |
| try (FileOutputStream fos = new FileOutputStream(new File(outDir, simpleName + StringConstants.PROTOTYPE_SUFFIX + ".class"))) { |
| fos.write(buf); |
| } |
| } |
| |
| if (sci.isConstructorNeeded()) { |
| // generate constructor class |
| final ConstructorGenerator consGen = new ConstructorGenerator(sci); |
| buf = consGen.getClassBytes(); |
| if (DEBUG) { |
| verify(buf); |
| } |
| try (FileOutputStream fos = new FileOutputStream(new File(outDir, simpleName + StringConstants.CONSTRUCTOR_SUFFIX + ".class"))) { |
| fos.write(buf); |
| } |
| } |
| } |
| return true; |
| } catch (final IOException | RuntimeException e) { |
| if (DEBUG) { |
| e.printStackTrace(System.err); |
| } |
| reporter.error(e.getMessage()); |
| |
| return false; |
| } |
| } |
| |
| private static void verify(final byte[] buf) { |
| final ClassReader cr = new ClassReader(buf); |
| CheckClassAdapter.verify(cr, false, new PrintWriter(System.err)); |
| } |
| |
| private static void error(final String msg, final int exitCode) { |
| System.err.println(msg); |
| System.exit(exitCode); |
| } |
| } |