1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 import org.objectweb.asm.*; 18 import org.objectweb.asm.tree.*; 19 import java.io.*; 20 import java.util.*; 21 22 public class Asm { 23 /* 24 25 Overall class access flags: 26 27 0x0001 | // public 28 0x0010 | // final 29 0x0020 | // super 30 0x0200 | // interface 31 0x0400 | // abstract 32 0x1000 | // synthetic 33 0x2000 | // annotation 34 0x4000 ; // enum 35 36 */ 37 38 public final static int INTERFACE_DEFINED_BITS = 39 0x0001 | // public, may be set. 40 0x0010 | // final, must not be set. 41 0x0020 | // super, must not be set. 42 0x0200 | // interface, must be set. 43 0x0400 | // abstract, must be set. 44 0x1000 | // synthetic, may be set. 45 0x2000 | // annotation, may be set (annotation implies interface) 46 0x4000 ; // enum, must not be set. 47 48 public final static int CLASS_DEFINED_BITS = 49 0x0001 | // public, may be set. 50 0x0010 | // final, may be set. 51 0x0020 | // super, may be set. 52 0x0200 | // interface, must not be set. 53 0x0400 | // abstract, may be set. 54 0x1000 | // synthetic, may be set. 55 0x2000 | // annotation, must not be set. 56 0x4000 ; // enum, may be set. 57 58 public final static int FIELD_DEFINED_BITS = 59 0x0001 | // public 60 0x0002 | // private 61 0x0004 | // protected 62 0x0008 | // static 63 0x0010 | // final 64 0x0040 | // volatile 65 0x0080 | // transient 66 0x1000 | // synthetic 67 0x4000 ; // enum 68 69 public final static int METHOD_DEFINED_BITS = 70 0x0001 | // public 71 0x0002 | // private 72 0x0004 | // protected 73 0x0008 | // static 74 0x0010 | // final 75 0x0020 | // synchronized 76 0x0040 | // bridge 77 0x0080 | // varargs 78 0x0100 | // native 79 0x0400 | // abstract 80 0x0800 | // strictfp 81 0x1000 ; // synthetic 82 83 public static void main(String args[]) throws Exception { 84 modify("Inf"); 85 modify("NonInf"); 86 } 87 88 private static void modify(String clazz) throws Exception { 89 ClassNode classNode = new ClassNode(); 90 ClassReader cr = new ClassReader(clazz); 91 cr.accept(classNode, 0); 92 93 modify(classNode); 94 95 ClassWriter cw = new ClassWriter(0); 96 classNode.accept(cw); 97 byte[] b = cw.toByteArray(); 98 OutputStream out = new FileOutputStream(clazz + ".out"); 99 out.write(b, 0, b.length); 100 out.close(); 101 } 102 103 private static void modify(ClassNode classNode) throws Exception { 104 int classFlagsOr = 0xFFFF; 105 // Check whether classNode is an interface or class. 106 if ((classNode.access & Opcodes.ACC_INTERFACE) == 0) { 107 classFlagsOr ^= CLASS_DEFINED_BITS; 108 } else { 109 classFlagsOr ^= INTERFACE_DEFINED_BITS; 110 } 111 classNode.access |= classFlagsOr; 112 113 // Fields. 114 int fieldFlagsOr = 0xFFFF ^ FIELD_DEFINED_BITS; 115 for (FieldNode fieldNode : (List<FieldNode>)classNode.fields) { 116 fieldNode.access |= fieldFlagsOr; 117 } 118 119 // Methods. 120 int methodFlagsOr = 0xFFFF ^ METHOD_DEFINED_BITS; 121 for (MethodNode methodNode :(List<MethodNode>) classNode.methods) { 122 methodNode.access |= methodFlagsOr; 123 } 124 } 125 } 126
