package com.sun.org.apache.bcel.internal.verifier;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache BCEL" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache BCEL", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import com.sun.org.apache.bcel.internal.*;
import com.sun.org.apache.bcel.internal.classfile.*;
import com.sun.org.apache.bcel.internal.generic.*;
import com.sun.org.apache.bcel.internal.util.*;
import com.sun.org.apache.bcel.internal.verifier.statics.*;
import com.sun.org.apache.bcel.internal.verifier.structurals.*;
import com.sun.org.apache.bcel.internal.verifier.exc.*;
import com.sun.org.apache.bcel.internal.verifier.exc.Utility; // Ambigous if not declared explicitely.
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
/**
* A Verifier instance is there to verify a class file according to The Java Virtual
* Machine Specification, 2nd Edition.
*
* Pass-3b-verification includes pass-3a-verification;
* pass-3a-verification includes pass-2-verification;
* pass-2-verification includes pass-1-verification.
*
* A Verifier creates PassVerifier instances to perform the actual verification.
*
* @version $Id: Verifier.java,v 1.1.1.1 2001/10/29 20:00:31 jvanzyl Exp $
* @author <A HREF="http://www.inf.fu-berlin.de/~ehaase"/>Enver Haase</A>
* @see com.sun.org.apache.bcel.internal.verifier.PassVerifier
*/
public class Verifier{
/**
* The name of the class this verifier operates on.
*/
private final String classname;
/** A Pass1Verifier for this Verifier instance. */
private Pass1Verifier p1v;
/** A Pass2Verifier for this Verifier instance. */
private Pass2Verifier p2v;
/** The Pass3aVerifiers for this Verifier instance. Key: Interned string specifying the method number. */
private HashMap p3avs = new HashMap();
/** The Pass3bVerifiers for this Verifier instance. Key: Interned string specifying the method number. */
private HashMap p3bvs = new HashMap();
/** Returns the VerificationResult for the given pass. */
public VerificationResult doPass1(){
if (p1v == null){
p1v = new Pass1Verifier(this);
}
return p1v.verify();
}
/** Returns the VerificationResult for the given pass. */
public VerificationResult doPass2(){
if (p2v == null){
p2v = new Pass2Verifier(this);
}
return p2v.verify();
}
/** Returns the VerificationResult for the given pass. */
public VerificationResult doPass3a(int method_no){
String key = Integer.toString(method_no);
Pass3aVerifier p3av;
p3av = (Pass3aVerifier) (p3avs.get(key));
if (p3avs.get(key) == null){
p3av = new Pass3aVerifier(this, method_no);
p3avs.put(key, p3av);
}
return p3av.verify();
}
/** Returns the VerificationResult for the given pass. */
public VerificationResult doPass3b(int method_no){
String key = Integer.toString(method_no);
Pass3bVerifier p3bv;
p3bv = (Pass3bVerifier) (p3bvs.get(key));
if (p3bvs.get(key) == null){
p3bv = new Pass3bVerifier(this, method_no);
p3bvs.put(key, p3bv);
}
return p3bv.verify();
}
/**
* This class may not be no-args instantiated.
*/
private Verifier(){
classname = ""; // never executed anyway, make compiler happy.
}// not noargs-instantiable
/**
* Instantiation is done by the VerifierFactory.
*
* @see VerifierFactory
*/
Verifier(String fully_qualified_classname){
classname = fully_qualified_classname;
flush();
}
/**
* Returns the name of the class this verifier operates on.
* This is particularly interesting when this verifier was created
* recursively by another Verifier and you got a reference to this
* Verifier by the getVerifiers() method of the VerifierFactory.
* @see VerifierFactory
*/
public final String getClassName(){
return classname;
}
/**
* Forget everything known about the class file; that means, really
* start a new verification of a possibly different class file from
* BCEL's repository.
*
*/
public void flush(){
p1v = null;
p2v = null;
p3avs.clear();
p3bvs.clear();
}
/**
* This returns all the (warning) messages collected during verification.
* A prefix shows from which verifying pass a message originates.
*/
public String[] getMessages(){
ArrayList messages = new ArrayList();
if (p1v != null){
String[] p1m = p1v.getMessages();
for (int i=0; i<p1m.length; i++){
messages.add("Pass 1: "+p1m[i]);
}
}
if (p2v != null){
String[] p2m = p2v.getMessages();
for (int i=0; i<p2m.length; i++){
messages.add("Pass 2: "+p2m[i]);
}
}
Iterator p3as = p3avs.values().iterator();
while (p3as.hasNext()){
Pass3aVerifier pv = (Pass3aVerifier) p3as.next();
String[] p3am = pv.getMessages();
int meth = pv.getMethodNo();
for (int i=0; i<p3am.length; i++){
messages.add("Pass 3a, method "+meth+" ('"+Repository.lookupClass(classname).getMethods()[meth]+"'): "+p3am[i]);
}
}
Iterator p3bs = p3bvs.values().iterator();
while (p3bs.hasNext()){
Pass3bVerifier pv = (Pass3bVerifier) p3bs.next();
String[] p3bm = pv.getMessages();
int meth = pv.getMethodNo();
for (int i=0; i<p3bm.length; i++){
messages.add("Pass 3b, method "+meth+" ('"+Repository.lookupClass(classname).getMethods()[meth]+"'): "+p3bm[i]);
}
}
String[] ret = new String[messages.size()];
for (int i=0; i< messages.size(); i++){
ret[i] = (String) messages.get(i);
}
return ret;
}
/**
* Verifies class files.
* This is a simple demonstration of how the API of BCEL's
* class file verifier "JustIce" may be used.
* You should supply command-line arguments which are
* fully qualified namea of the classes to verify. These class files
* must be somewhere in your CLASSPATH (refer to Sun's
* documentation for questions about this) or you must have put the classes
* into the BCEL Repository yourself (via 'addClass(JavaClass)').
*/
public static void _main(String [] args){
System.out.println("JustIce by Enver Haase, (C) 2001. http://bcel.sourceforge.net\n");
for(int k=0; k < args.length; k++) {
if (args[k].endsWith(".class")){
int dotclasspos = args[k].lastIndexOf(".class");
if (dotclasspos != -1) args[k] = args[k].substring(0,dotclasspos);
}
args[k] = args[k].replace('/', '.');
System.out.println("Now verifiying: "+args[k]+"\n");
Verifier v = VerifierFactory.getVerifier(args[k]);
VerificationResult vr;
vr = v.doPass1();
System.out.println("Pass 1:\n"+vr);
vr = v.doPass2();
System.out.println("Pass 2:\n"+vr);
if (vr == VerificationResult.VR_OK){
JavaClass jc = Repository.lookupClass(args[k]);
for (int i=0; i<jc.getMethods().length; i++){
vr = v.doPass3a(i);
System.out.println("Pass 3a, method "+i+" ['"+jc.getMethods()[i]+"']:\n"+vr);
vr = v.doPass3b(i);
System.out.println("Pass 3b, method number "+i+" ['"+jc.getMethods()[i]+"']:\n"+vr);
}
}
System.out.println("Warnings:");
String[] warnings = v.getMessages();
if (warnings.length == 0) System.out.println("<none>");
for (int j=0; j<warnings.length; j++){
System.out.println(warnings[j]);
}
System.out.println("\n");
// avoid swapping.
v.flush();
Repository.clearCache();
System.gc();
}
}
}
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