1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.bcel.verifier;
20
21 import org.apache.bcel.classfile.JavaClass;
22 import org.apache.bcel.classfile.Utility;
23
24 /**
25 * The NativeVerifier class implements a main(String[] args) method that's roughly compatible to the one in the Verifier
26 * class, but that uses the JVM's internal verifier for its class file verification. This can be used for comparison
27 * runs between the JVM-internal verifier and JustIce.
28 */
29 public abstract class NativeVerifier {
30
31 /**
32 * Works only on the first argument.
33 */
34 public static void main(final String[] args) {
35 if (args.length != 1) {
36 System.out.println("Verifier front-end: need exactly one argument.");
37 System.exit(1);
38 }
39 final int dotclasspos = args[0].lastIndexOf(JavaClass.EXTENSION);
40 if (dotclasspos != -1) {
41 args[0] = args[0].substring(0, dotclasspos);
42 }
43 args[0] = Utility.pathToPackage(args[0]);
44 // System.out.println(args[0]);
45 try {
46 Class.forName(args[0]);
47 } catch (final ExceptionInInitializerError eiie) { // subclass of LinkageError!
48 System.out.println("NativeVerifier: ExceptionInInitializerError encountered on '" + args[0] + "'.");
49 System.out.println(eiie);
50 System.exit(1);
51 } catch (final LinkageError le) {
52 System.out.println("NativeVerifier: LinkageError encountered on '" + args[0] + "'.");
53 System.out.println(le);
54 System.exit(1);
55 } catch (final ClassNotFoundException cnfe) {
56 System.out.println("NativeVerifier: FILE NOT FOUND: '" + args[0] + "'.");
57 System.exit(1);
58 } catch (final Throwable t) { // OK to catch Throwable here as we call exit.
59 System.out.println("NativeVerifier: Unspecified verification error on '" + args[0] + "'.");
60 System.exit(1);
61 }
62 System.out.println("NativeVerifier: Class file '" + args[0] + "' seems to be okay.");
63 System.exit(0);
64 }
65
66 /**
67 * This class must not be instantiated.
68 */
69 private NativeVerifier() {
70 }
71 }