1b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/* 2b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ProGuard -- shrinking, optimization, obfuscation, and preverification 3b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * of Java bytecode. 4b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 59f606f95f03a75961498803e24bee6799a7c0885Ying Wang * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu) 6b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 7b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is free software; you can redistribute it and/or modify it 8b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * under the terms of the GNU General Public License as published by the Free 9b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Software Foundation; either version 2 of the License, or (at your option) 10b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * any later version. 11b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 12b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This program is distributed in the hope that it will be useful, but WITHOUT 13b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * more details. 16b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 17b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * You should have received a copy of the GNU General Public License along 18b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * with this program; if not, write to the Free Software Foundation, Inc., 19b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 21b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopackage proguard.optimize.info; 22b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 23b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.*; 249f606f95f03a75961498803e24bee6799a7c0885Ying Wangimport proguard.classfile.attribute.CodeAttribute; 25b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.constant.*; 26b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.constant.visitor.ConstantVisitor; 27b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.instruction.*; 28b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.instruction.visitor.InstructionVisitor; 29b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.util.SimplifiedVisitor; 30b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimport proguard.classfile.visitor.*; 31b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 32b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato/** 33b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * This InstructionVisitor marks the types of class accesses and class member 34b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * accesses of the methods whose instructions it visits. 35b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * 36b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * @author Eric Lafortune 37b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 38b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratopublic class AccessMethodMarker 39b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoextends SimplifiedVisitor 40b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onoratoimplements InstructionVisitor, 41b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ConstantVisitor, 42b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato ClassVisitor, 43b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato MemberVisitor 44b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato{ 45b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private Method invokingMethod; 46b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 47b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 48b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Implementations for InstructionVisitor. 49b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 50b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) {} 51b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 52b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 53b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction) 54b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 55b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato invokingMethod = method; 56b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 57b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato clazz.constantPoolEntryAccept(constantInstruction.constantIndex, this); 58b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 59b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 60b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 61b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Implementations for ConstantVisitor. 62b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 63b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitAnyConstant(Clazz clazz, Constant constant) {} 64b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 65b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 66b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitStringConstant(Clazz clazz, StringConstant stringConstant) 67b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 68b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Check the referenced class or class member, if any. 69b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato stringConstant.referencedClassAccept(this); 70b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato stringConstant.referencedMemberAccept(this); 71b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 72b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 73b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 74b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitAnyRefConstant(Clazz clazz, RefConstant refConstant) 75b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 76b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Check the referenced class. 77b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato clazz.constantPoolEntryAccept(refConstant.u2classIndex, this); 78b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 79b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Check the referenced class member itself. 80b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato refConstant.referencedClassAccept(this); 81b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato refConstant.referencedMemberAccept(this); 82b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 83b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 84b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 85b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitClassConstant(Clazz clazz, ClassConstant classConstant) 86b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 87b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Check the referenced class. 88b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato classConstant.referencedClassAccept(this); 89b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 90b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 91b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 92b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Implementations for ClassVisitor. 93b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 94b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitAnyClass(Clazz clazz) 95b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 96b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato int accessFlags = clazz.getAccessFlags(); 97b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 98b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if ((accessFlags & ClassConstants.INTERNAL_ACC_PUBLIC) == 0) 99b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 100b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato setAccessesPackageCode(invokingMethod); 101b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 102b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 103b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 104b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 105b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Implementations for MemberVisitor. 106b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 107b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public void visitAnyMember(Clazz clazz, Member member) 108b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 109b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato int accessFlags = member.getAccessFlags(); 110b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 111b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if ((accessFlags & ClassConstants.INTERNAL_ACC_PRIVATE) != 0) 112b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 113b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato setAccessesPrivateCode(invokingMethod); 114b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 115b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato else if ((accessFlags & ClassConstants.INTERNAL_ACC_PROTECTED) != 0) 116b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 117b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato setAccessesProtectedCode(invokingMethod); 118b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 119b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato else if ((accessFlags & ClassConstants.INTERNAL_ACC_PUBLIC) == 0) 120b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 121b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato setAccessesPackageCode(invokingMethod); 122b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 123b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 124b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 125b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 126b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato // Small utility methods. 127b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 128b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private static void setAccessesPrivateCode(Method method) 129b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 130b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); 131b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (info != null) 132b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 133b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato info.setAccessesPrivateCode(); 134b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 135b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 136b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 137b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 138b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 139b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns whether the given method accesses private class members. 140b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 141b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static boolean accessesPrivateCode(Method method) 142b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 143b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); 144b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return info == null || info.accessesPrivateCode(); 145b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 146b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 147b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 148b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private static void setAccessesPackageCode(Method method) 149b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 150b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); 151b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (info != null) 152b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 153b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato info.setAccessesPackageCode(); 154b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 155b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 156b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 157b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 158b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 159b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns whether the given method accesses package visible classes or class 160b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * members. 161b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 162b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static boolean accessesPackageCode(Method method) 163b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 164b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); 165b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return info == null || info.accessesPackageCode(); 166b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 167b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 168b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 169b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato private static void setAccessesProtectedCode(Method method) 170b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 171b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); 172b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato if (info != null) 173b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 174b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato info.setAccessesProtectedCode(); 175b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 176b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 177b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 178b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato 179b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato /** 180b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato * Returns whether the given method accesses protected class members. 181b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato */ 182b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato public static boolean accessesProtectedCode(Method method) 183b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato { 184b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); 185b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato return info == null || info.accessesProtectedCode(); 186b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato } 187b72c5c2e5482cf10117b2b25f642f7616b2326c3Joe Onorato} 188