bb-tools/proguard4.7/src/proguard/Initializer.java
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2011 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard;
import proguard.classfile.ClassPool;
import proguard.classfile.attribute.visitor.AllAttributeVisitor;
import proguard.classfile.constant.visitor.*;
import proguard.classfile.instruction.visitor.AllInstructionVisitor;
import proguard.classfile.util.*;
import proguard.classfile.visitor.*;
import proguard.util.*;
import java.io.IOException;
import java.util.*;
/**
* This class initializes class pools.
*
* @author Eric Lafortune
*/
public class Initializer
{
private final Configuration configuration;
/**
* Creates a new Initializer to initialize classes according to the given
* configuration.
*/
public Initializer(Configuration configuration)
{
this.configuration = configuration;
}
/**
* Initializes the classes in the given program class pool and library class
* pool, performs some basic checks, and shrinks the library class pool.
*/
public void execute(ClassPool programClassPool,
ClassPool libraryClassPool) throws IOException
{
int originalLibraryClassPoolSize = libraryClassPool.size();
// Perform a basic check on the keep options in the configuration.
WarningPrinter keepClassMemberNotePrinter = new WarningPrinter(System.out, configuration.note);
new KeepClassMemberChecker(keepClassMemberNotePrinter).checkClassSpecifications(configuration.keep);
// Construct a reduced library class pool with only those library
// classes whose hierarchies are referenced by the program classes.
// We can't do this if we later have to come up with the obfuscated
// class member names that are globally unique.
ClassPool reducedLibraryClassPool = configuration.useUniqueClassMemberNames ?
null : new ClassPool();
WarningPrinter classReferenceWarningPrinter = new WarningPrinter(System.err, configuration.warn);
WarningPrinter dependencyWarningPrinter = new WarningPrinter(System.err, configuration.warn);
// Initialize the superclass hierarchies for program classes.
programClassPool.classesAccept(
new ClassSuperHierarchyInitializer(programClassPool,
libraryClassPool,
classReferenceWarningPrinter,
null));
// Initialize the superclass hierarchy of all library classes, without
// warnings.
libraryClassPool.classesAccept(
new ClassSuperHierarchyInitializer(programClassPool,
libraryClassPool,
null,
dependencyWarningPrinter));
// Initialize the class references of program class members and
// attributes. Note that all superclass hierarchies have to be
// initialized for this purpose.
WarningPrinter memberReferenceWarningPrinter = new WarningPrinter(System.err, configuration.warn);
programClassPool.classesAccept(
new ClassReferenceInitializer(programClassPool,
libraryClassPool,
classReferenceWarningPrinter,
memberReferenceWarningPrinter,
null));
if (reducedLibraryClassPool != null)
{
// Collect the library classes that are directly referenced by
// program classes, without introspection.
programClassPool.classesAccept(
new ReferencedClassVisitor(
new LibraryClassFilter(
new ClassPoolFiller(reducedLibraryClassPool))));
// Reinitialize the superclass hierarchies of referenced library
// classes, this time with warnings.
reducedLibraryClassPool.classesAccept(
new ClassSuperHierarchyInitializer(programClassPool,
libraryClassPool,
classReferenceWarningPrinter,
null));
}
// Initialize the Class.forName references.
WarningPrinter dynamicClassReferenceNotePrinter = new WarningPrinter(System.out, configuration.note);
WarningPrinter classForNameNotePrinter = new WarningPrinter(System.out, configuration.note);
programClassPool.classesAccept(
new AllMethodVisitor(
new AllAttributeVisitor(
new AllInstructionVisitor(
new DynamicClassReferenceInitializer(programClassPool,
libraryClassPool,
dynamicClassReferenceNotePrinter,
null,
classForNameNotePrinter,
createClassNoteExceptionMatcher(configuration.keep))))));
// Initialize the Class.get[Declared]{Field,Method} references.
WarningPrinter getMemberNotePrinter = new WarningPrinter(System.out, configuration.note);
programClassPool.classesAccept(
new AllMethodVisitor(
new AllAttributeVisitor(
new AllInstructionVisitor(
new DynamicMemberReferenceInitializer(programClassPool,
libraryClassPool,
getMemberNotePrinter,
createClassMemberNoteExceptionMatcher(configuration.keep, true),
createClassMemberNoteExceptionMatcher(configuration.keep, false))))));
// Initialize other string constant references, if requested.
if (configuration.adaptClassStrings != null)
{
programClassPool.classesAccept(
new ClassNameFilter(configuration.adaptClassStrings,
new AllConstantVisitor(
new StringReferenceInitializer(programClassPool,
libraryClassPool))));
}
// Print various notes, if specified.
WarningPrinter fullyQualifiedClassNameNotePrinter = new WarningPrinter(System.out, configuration.note);
WarningPrinter descriptorKeepNotePrinter = new WarningPrinter(System.out, configuration.note);
new FullyQualifiedClassNameChecker(programClassPool,
libraryClassPool,
fullyQualifiedClassNameNotePrinter).checkClassSpecifications(configuration.keep);
new DescriptorKeepChecker(programClassPool,
libraryClassPool,
descriptorKeepNotePrinter).checkClassSpecifications(configuration.keep);
// Initialize the class references of library class members.
if (reducedLibraryClassPool != null)
{
// Collect the library classes that are referenced by program
// classes, directly or indirectly, with or without introspection.
programClassPool.classesAccept(
new ReferencedClassVisitor(
new LibraryClassFilter(
new ClassHierarchyTraveler(true, true, true, false,
new LibraryClassFilter(
new ClassPoolFiller(reducedLibraryClassPool))))));
// Initialize the class references of referenced library
// classes, without warnings.
reducedLibraryClassPool.classesAccept(
new ClassReferenceInitializer(programClassPool,
libraryClassPool,
null,
null,
dependencyWarningPrinter));
// Reset the library class pool.
libraryClassPool.clear();
// Copy the library classes that are referenced directly by program
// classes and the library classes that are referenced by referenced
// library classes.
reducedLibraryClassPool.classesAccept(
new MultiClassVisitor(new ClassVisitor[]
{
new ClassHierarchyTraveler(true, true, true, false,
new LibraryClassFilter(
new ClassPoolFiller(libraryClassPool))),
new ReferencedClassVisitor(
new LibraryClassFilter(
new ClassHierarchyTraveler(true, true, true, false,
new LibraryClassFilter(
new ClassPoolFiller(libraryClassPool)))))
}));
}
else
{
// Initialize the class references of all library class members.
libraryClassPool.classesAccept(
new ClassReferenceInitializer(programClassPool,
libraryClassPool,
null,
null,
dependencyWarningPrinter));
}
// Initialize the subclass hierarchies.
programClassPool.classesAccept(new ClassSubHierarchyInitializer());
libraryClassPool.classesAccept(new ClassSubHierarchyInitializer());
// Share strings between the classes, to reduce heap memory usage.
programClassPool.classesAccept(new StringSharer());
libraryClassPool.classesAccept(new StringSharer());
// Print out a summary of the notes, if necessary.
int fullyQualifiedNoteCount = fullyQualifiedClassNameNotePrinter.getWarningCount();
if (fullyQualifiedNoteCount > 0)
{
System.out.println("Note: there were " + fullyQualifiedNoteCount +
" references to unknown classes.");
System.out.println(" You should check your configuration for typos.");
}
int descriptorNoteCount = descriptorKeepNotePrinter.getWarningCount();
if (descriptorNoteCount > 0)
{
System.out.println("Note: there were " + descriptorNoteCount +
" unkept descriptor classes in kept class members.");
System.out.println(" You should consider explicitly keeping the mentioned classes");
System.out.println(" (using '-keep').");
}
int dynamicClassReferenceNoteCount = dynamicClassReferenceNotePrinter.getWarningCount();
if (dynamicClassReferenceNoteCount > 0)
{
System.out.println("Note: there were " + dynamicClassReferenceNoteCount +
" unresolved dynamic references to classes or interfaces.");
System.err.println(" You should check if you need to specify additional program jars.");
}
int classForNameNoteCount = classForNameNotePrinter.getWarningCount();
if (classForNameNoteCount > 0)
{
System.out.println("Note: there were " + classForNameNoteCount +
" class casts of dynamically created class instances.");
System.out.println(" You might consider explicitly keeping the mentioned classes and/or");
System.out.println(" their implementations (using '-keep').");
}
int getmemberNoteCount = getMemberNotePrinter.getWarningCount();
if (getmemberNoteCount > 0)
{
System.out.println("Note: there were " + getmemberNoteCount +
" accesses to class members by means of introspection.");
System.out.println(" You should consider explicitly keeping the mentioned class members");
System.out.println(" (using '-keep' or '-keepclassmembers').");
}
// Print out a summary of the warnings, if necessary.
int classReferenceWarningCount = classReferenceWarningPrinter.getWarningCount();
if (classReferenceWarningCount > 0)
{
System.err.println("Warning: there were " + classReferenceWarningCount +
" unresolved references to classes or interfaces.");
System.err.println(" You may need to specify additional library jars (using '-libraryjars').");
if (configuration.skipNonPublicLibraryClasses)
{
System.err.println(" You may also have to remove the option '-skipnonpubliclibraryclasses'.");
}
}
int dependencyWarningCount = dependencyWarningPrinter.getWarningCount();
if (dependencyWarningCount > 0)
{
System.err.println("Warning: there were " + dependencyWarningCount +
" instances of library classes depending on program classes.");
System.err.println(" You must avoid such dependencies, since the program classes will");
System.err.println(" be processed, while the library classes will remain unchanged.");
}
int memberReferenceWarningCount = memberReferenceWarningPrinter.getWarningCount();
if (memberReferenceWarningCount > 0)
{
System.err.println("Warning: there were " + memberReferenceWarningCount +
" unresolved references to program class members.");
System.err.println(" Your input classes appear to be inconsistent.");
System.err.println(" You may need to recompile them and try again.");
System.err.println(" Alternatively, you may have to specify the option ");
System.err.println(" '-dontskipnonpubliclibraryclassmembers'.");
if (configuration.skipNonPublicLibraryClasses)
{
System.err.println(" You may also have to remove the option '-skipnonpubliclibraryclasses'.");
}
}
if ((classReferenceWarningCount > 0 ||
dependencyWarningCount > 0 ||
memberReferenceWarningCount > 0) &&
!configuration.ignoreWarnings)
{
throw new IOException("Please correct the above warnings first.");
}
if ((configuration.note == null ||
!configuration.note.isEmpty()) &&
(configuration.warn != null &&
configuration.warn.isEmpty() ||
configuration.ignoreWarnings))
{
System.out.println("Note: You're ignoring all warnings!");
}
// Discard unused library classes.
if (configuration.verbose)
{
System.out.println("Ignoring unused library classes...");
System.out.println(" Original number of library classes: " + originalLibraryClassPoolSize);
System.out.println(" Final number of library classes: " + libraryClassPool.size());
}
}
/**
* Extracts a list of exceptions of classes for which not to print notes,
* from the keep configuration.
*/
private StringMatcher createClassNoteExceptionMatcher(List noteExceptions)
{
if (noteExceptions != null)
{
List noteExceptionNames = new ArrayList(noteExceptions.size());
for (int index = 0; index < noteExceptions.size(); index++)
{
KeepClassSpecification keepClassSpecification = (KeepClassSpecification)noteExceptions.get(index);
if (keepClassSpecification.markClasses)
{
// If the class itself is being kept, it's ok.
String className = keepClassSpecification.className;
if (className != null)
{
noteExceptionNames.add(className);
}
// If all of its extensions are being kept, it's ok too.
String extendsClassName = keepClassSpecification.extendsClassName;
if (extendsClassName != null)
{
noteExceptionNames.add(extendsClassName);
}
}
}
if (noteExceptionNames.size() > 0)
{
return new ListParser(new ClassNameParser()).parse(noteExceptionNames);
}
}
return null;
}
/**
* Extracts a list of exceptions of field or method names for which not to
* print notes, from the keep configuration.
*/
private StringMatcher createClassMemberNoteExceptionMatcher(List noteExceptions,
boolean isField)
{
if (noteExceptions != null)
{
List noteExceptionNames = new ArrayList();
for (int index = 0; index < noteExceptions.size(); index++)
{
KeepClassSpecification keepClassSpecification = (KeepClassSpecification)noteExceptions.get(index);
List memberSpecifications = isField ?
keepClassSpecification.fieldSpecifications :
keepClassSpecification.methodSpecifications;
if (memberSpecifications != null)
{
for (int index2 = 0; index2 < memberSpecifications.size(); index2++)
{
MemberSpecification memberSpecification =
(MemberSpecification)memberSpecifications.get(index2);
String memberName = memberSpecification.name;
if (memberName != null)
{
noteExceptionNames.add(memberName);
}
}
}
}
if (noteExceptionNames.size() > 0)
{
return new ListParser(new ClassNameParser()).parse(noteExceptionNames);
}
}
return null;
}
}