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126 lines
3.7 KiB
126 lines
3.7 KiB
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import org.objectweb.asm.*;
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import org.objectweb.asm.tree.*;
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import java.io.*;
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import java.util.*;
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public class Asm {
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/*
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Overall class access flags:
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0x0001 | // public
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0x0010 | // final
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0x0020 | // super
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0x0200 | // interface
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0x0400 | // abstract
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0x1000 | // synthetic
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0x2000 | // annotation
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0x4000 ; // enum
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*/
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public final static int INTERFACE_DEFINED_BITS =
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0x0001 | // public, may be set.
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0x0010 | // final, must not be set.
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0x0020 | // super, must not be set.
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0x0200 | // interface, must be set.
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0x0400 | // abstract, must be set.
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0x1000 | // synthetic, may be set.
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0x2000 | // annotation, may be set (annotation implies interface)
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0x4000 ; // enum, must not be set.
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public final static int CLASS_DEFINED_BITS =
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0x0001 | // public, may be set.
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0x0010 | // final, may be set.
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0x0020 | // super, may be set.
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0x0200 | // interface, must not be set.
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0x0400 | // abstract, may be set.
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0x1000 | // synthetic, may be set.
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0x2000 | // annotation, must not be set.
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0x4000 ; // enum, may be set.
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public final static int FIELD_DEFINED_BITS =
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0x0001 | // public
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0x0002 | // private
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0x0004 | // protected
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0x0008 | // static
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0x0010 | // final
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0x0040 | // volatile
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0x0080 | // transient
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0x1000 | // synthetic
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0x4000 ; // enum
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public final static int METHOD_DEFINED_BITS =
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0x0001 | // public
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0x0002 | // private
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0x0004 | // protected
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0x0008 | // static
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0x0010 | // final
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0x0020 | // synchronized
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0x0040 | // bridge
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0x0080 | // varargs
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0x0100 | // native
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0x0400 | // abstract
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0x0800 | // strictfp
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0x1000 ; // synthetic
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public static void main(String args[]) throws Exception {
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modify("Inf");
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modify("NonInf");
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}
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private static void modify(String clazz) throws Exception {
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ClassNode classNode = new ClassNode();
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ClassReader cr = new ClassReader(clazz);
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cr.accept(classNode, 0);
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modify(classNode);
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ClassWriter cw = new ClassWriter(0);
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classNode.accept(cw);
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byte[] b = cw.toByteArray();
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OutputStream out = new FileOutputStream(clazz + ".out");
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out.write(b, 0, b.length);
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out.close();
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}
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private static void modify(ClassNode classNode) throws Exception {
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int classFlagsOr = 0xFFFF;
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// Check whether classNode is an interface or class.
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if ((classNode.access & Opcodes.ACC_INTERFACE) == 0) {
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classFlagsOr ^= CLASS_DEFINED_BITS;
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} else {
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classFlagsOr ^= INTERFACE_DEFINED_BITS;
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}
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classNode.access |= classFlagsOr;
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// Fields.
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int fieldFlagsOr = 0xFFFF ^ FIELD_DEFINED_BITS;
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for (FieldNode fieldNode : (List<FieldNode>)classNode.fields) {
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fieldNode.access |= fieldFlagsOr;
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}
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// Methods.
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int methodFlagsOr = 0xFFFF ^ METHOD_DEFINED_BITS;
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for (MethodNode methodNode :(List<MethodNode>) classNode.methods) {
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methodNode.access |= methodFlagsOr;
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}
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}
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}
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