| /* |
| * ProGuard -- shrinking, optimization, obfuscation, and preverification |
| * of Java bytecode. |
| * |
| * Copyright (c) 2002-2014 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.optimize.info; |
| |
| import proguard.classfile.*; |
| import proguard.classfile.attribute.CodeAttribute; |
| import proguard.classfile.constant.*; |
| import proguard.classfile.constant.visitor.ConstantVisitor; |
| import proguard.classfile.instruction.*; |
| import proguard.classfile.instruction.visitor.InstructionVisitor; |
| import proguard.classfile.util.SimplifiedVisitor; |
| import proguard.classfile.visitor.*; |
| |
| /** |
| * This InstructionVisitor marks the types of class accesses and class member |
| * accesses of the methods whose instructions it visits. |
| * |
| * @author Eric Lafortune |
| */ |
| public class AccessMethodMarker |
| extends SimplifiedVisitor |
| implements InstructionVisitor, |
| ConstantVisitor, |
| ClassVisitor, |
| MemberVisitor |
| { |
| private Method invokingMethod; |
| |
| |
| // Implementations for InstructionVisitor. |
| |
| public void visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) {} |
| |
| |
| public void visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction) |
| { |
| invokingMethod = method; |
| |
| clazz.constantPoolEntryAccept(constantInstruction.constantIndex, this); |
| } |
| |
| |
| // Implementations for ConstantVisitor. |
| |
| public void visitAnyConstant(Clazz clazz, Constant constant) {} |
| |
| |
| public void visitStringConstant(Clazz clazz, StringConstant stringConstant) |
| { |
| // Check the referenced class or class member, if any. |
| stringConstant.referencedClassAccept(this); |
| stringConstant.referencedMemberAccept(this); |
| } |
| |
| |
| public void visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant) |
| { |
| // Check the bootstrap method. |
| invokeDynamicConstant.bootstrapMethodHandleAccept(clazz, this); |
| } |
| |
| |
| public void visitMethodHandleConstant(Clazz clazz, MethodHandleConstant methodHandleConstant) |
| { |
| // Check the method reference. |
| clazz.constantPoolEntryAccept(methodHandleConstant.u2referenceIndex, this); |
| } |
| |
| |
| public void visitAnyRefConstant(Clazz clazz, RefConstant refConstant) |
| { |
| // Check the referenced class. |
| clazz.constantPoolEntryAccept(refConstant.u2classIndex, this); |
| |
| // Check the referenced class member itself. |
| refConstant.referencedClassAccept(this); |
| refConstant.referencedMemberAccept(this); |
| } |
| |
| |
| public void visitClassConstant(Clazz clazz, ClassConstant classConstant) |
| { |
| // Check the referenced class. |
| classConstant.referencedClassAccept(this); |
| } |
| |
| |
| // Implementations for ClassVisitor. |
| |
| public void visitAnyClass(Clazz clazz) |
| { |
| int accessFlags = clazz.getAccessFlags(); |
| |
| if ((accessFlags & ClassConstants.ACC_PUBLIC) == 0) |
| { |
| setAccessesPackageCode(invokingMethod); |
| } |
| } |
| |
| |
| // Implementations for MemberVisitor. |
| |
| public void visitAnyMember(Clazz clazz, Member member) |
| { |
| int accessFlags = member.getAccessFlags(); |
| |
| if ((accessFlags & ClassConstants.ACC_PRIVATE) != 0) |
| { |
| setAccessesPrivateCode(invokingMethod); |
| } |
| else if ((accessFlags & ClassConstants.ACC_PROTECTED) != 0) |
| { |
| setAccessesProtectedCode(invokingMethod); |
| } |
| else if ((accessFlags & ClassConstants.ACC_PUBLIC) == 0) |
| { |
| setAccessesPackageCode(invokingMethod); |
| } |
| } |
| |
| |
| // Small utility methods. |
| |
| private static void setAccessesPrivateCode(Method method) |
| { |
| MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); |
| if (info != null) |
| { |
| info.setAccessesPrivateCode(); |
| } |
| } |
| |
| |
| /** |
| * Returns whether the given method accesses private class members. |
| */ |
| public static boolean accessesPrivateCode(Method method) |
| { |
| MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); |
| return info == null || info.accessesPrivateCode(); |
| } |
| |
| |
| private static void setAccessesPackageCode(Method method) |
| { |
| MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); |
| if (info != null) |
| { |
| info.setAccessesPackageCode(); |
| } |
| } |
| |
| |
| /** |
| * Returns whether the given method accesses package visible classes or class |
| * members. |
| */ |
| public static boolean accessesPackageCode(Method method) |
| { |
| MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); |
| return info == null || info.accessesPackageCode(); |
| } |
| |
| |
| private static void setAccessesProtectedCode(Method method) |
| { |
| MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); |
| if (info != null) |
| { |
| info.setAccessesProtectedCode(); |
| } |
| } |
| |
| |
| /** |
| * Returns whether the given method accesses protected class members. |
| */ |
| public static boolean accessesProtectedCode(Method method) |
| { |
| MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); |
| return info == null || info.accessesProtectedCode(); |
| } |
| } |