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/*
 * Copyright 2003-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.codehaus.groovy.ant;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.taskdefs.MatchingTask;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Label;
import org.objectweb.asm.tree.AbstractInsnNode;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.MethodNode;
import org.objectweb.asm.tree.analysis.Analyzer;
import org.objectweb.asm.tree.analysis.Frame;
import org.objectweb.asm.tree.analysis.SimpleVerifier;
import org.objectweb.asm.util.CheckClassAdapter;
import org.objectweb.asm.util.TraceMethodVisitor;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.List;

/**
 * Verify Class files. This task can take the following
 * arguments:
 * 
    *
  • dir *
* When this task executes, it will recursively scan the dir and * look for class files to verify. */ public class VerifyClass extends MatchingTask { private String topDir = null; private boolean verbose = false; public VerifyClass() { } public void execute() throws BuildException { if (topDir == null) throw new BuildException("no dir attribute is set"); File top = new File(topDir); if (!top.exists()) throw new BuildException("the directory " + top + " does not exist"); log("top dir is " + top); int fails = execute(top); if (fails == 0) { log("no bytecode problems found"); } else { log("found " + fails + " failing classes"); } } public void setDir(String dir) throws BuildException { topDir = dir; } public void setVerbose(boolean v) { verbose = v; } private int execute(File dir) { int fails = 0; File[] files = dir.listFiles(); for (int i = 0; i < files.length; i++) { File f = files[i]; if (f.isDirectory()) { fails += execute(f); } else if (f.getName().endsWith(".class")) { try { boolean ok = readClass(f.getCanonicalPath()); if (!ok) fails++; } catch (IOException ioe) { log(ioe.getMessage()); throw new BuildException(ioe); } } } return fails; } private boolean readClass(String clazz) throws IOException { ClassReader cr = new ClassReader(new FileInputStream(clazz)); ClassNode ca = new ClassNode() { public void visitEnd() { //accept(cv); } }; cr.accept(new CheckClassAdapter(ca), ClassWriter.COMPUTE_MAXS); boolean failed = false; List methods = ca.methods; for (int i = 0; i < methods.size(); ++i) { MethodNode method = (MethodNode) methods.get(i); if (method.instructions.size() > 0) { Analyzer a = new Analyzer(new SimpleVerifier()); try { a.analyze(ca.name, method); continue; } catch (Exception e) { e.printStackTrace(); } final Frame[] frames = a.getFrames(); if (!failed) { failed = true; log("verifying of class " + clazz + " failed"); } if (verbose) log(method.name + method.desc); TraceMethodVisitor mv = new TraceMethodVisitor(null); /*= new TraceMethodVisitor(null) { public void visitMaxs(int maxStack, int maxLocals) { StringBuffer buffer = new StringBuffer(); for (int i = 0; i < text.size(); ++i) { String s = frames[i] == null ? "null" : frames[i].toString(); while (s.length() < maxStack + maxLocals + 1) { s += " "; } buffer.append(Integer.toString(i + 100000).substring(1)); buffer.append(" "); buffer.append(s); buffer.append(" : "); buffer.append(text.get(i)); } if (verbose) log(buffer.toString()); } };*/ for (int j = 0; j < method.instructions.size(); ++j) { Object insn = method.instructions.get(j); if (insn instanceof AbstractInsnNode) { ((AbstractInsnNode) insn).accept(mv); } else { mv.visitLabel((Label) insn); } } mv.visitMaxs(method.maxStack, method.maxLocals); } } return !failed; } }




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