util.BytecodeChecker.java Source code

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Here is the source code for util.BytecodeChecker.java

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/*
 * Copyright (C) 2015, Charles University in Prague.
 *
 * 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 util;

import org.objectweb.asm.*;
import org.objectweb.asm.tree.*;
import org.objectweb.asm.tree.analysis.*;

public class BytecodeChecker {
    public static void main(String[] args) {
        String className = args[0];
        String methodName = args[1];

        try {
            ClassReader cr = new ClassReader(className);
            ClassNode cn = new ClassNode();
            cr.accept(cn, 0);

            for (int i = 0; i < cn.methods.size(); i++) {
                MethodNode mn = (MethodNode) cn.methods.get(i);

                if (mn.name.equals(methodName)) {
                    System.out.println("METHOD CODE");
                    System.out.println("===========");

                    for (int j = 0; j < mn.instructions.size(); j++) {
                        AbstractInsnNode insn = mn.instructions.get(j);
                        System.out.println(String.valueOf(j + 1) + ":" + insn);
                    }

                    System.out.println("ANALYSIS");
                    System.out.println("========");

                    Analyzer bca = new Analyzer(new SimpleVerifier());
                    bca.analyze(className.replace('.', '/'), mn);
                }
            }
        } catch (Exception ex) {
            System.out.println(ex.getMessage());
            ex.printStackTrace();
        }
    }
}