diff options
author | Sadaf Ebrahimi <sadafebrahimi@google.com> | 2024-03-18 16:14:43 +0000 |
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committer | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2024-03-18 16:14:43 +0000 |
commit | b956aa205b341677038bd599a78bc8173b7b4bad (patch) | |
tree | 864c52fff91ada9d6a095df9ed49786356575bf6 /src/proguard/obfuscate/MemberObfuscator.java | |
parent | ff9c0adb6dd6dc100776b29aca8bf7e8a8cf4969 (diff) | |
parent | 517437ecee41d115457a744f14c6aa0ed5006027 (diff) | |
download | proguard-main.tar.gz |
Diffstat (limited to 'src/proguard/obfuscate/MemberObfuscator.java')
-rw-r--r-- | src/proguard/obfuscate/MemberObfuscator.java | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/src/proguard/obfuscate/MemberObfuscator.java b/src/proguard/obfuscate/MemberObfuscator.java deleted file mode 100644 index b5211ac..0000000 --- a/src/proguard/obfuscate/MemberObfuscator.java +++ /dev/null @@ -1,229 +0,0 @@ -/* - * 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.obfuscate; - -import proguard.classfile.*; -import proguard.classfile.util.*; -import proguard.classfile.visitor.MemberVisitor; - -import java.util.*; - -/** - * This MemberVisitor obfuscates all class members that it visits. - * It uses names from the given name factory. At the same time, it avoids names - * from the given descriptor map. - * <p> - * The class members must have been linked before applying this visitor. - * - * @see MethodLinker - * - * @author Eric Lafortune - */ -public class MemberObfuscator -extends SimplifiedVisitor -implements MemberVisitor -{ - private final boolean allowAggressiveOverloading; - private final NameFactory nameFactory; - private final Map descriptorMap; - - - /** - * Creates a new MemberObfuscator. - * @param allowAggressiveOverloading a flag that specifies whether class - * members can be overloaded aggressively. - * @param nameFactory the factory that can produce - * obfuscated member names. - * @param descriptorMap the map of descriptors to - * [new name - old name] maps. - */ - public MemberObfuscator(boolean allowAggressiveOverloading, - NameFactory nameFactory, - Map descriptorMap) - { - this.allowAggressiveOverloading = allowAggressiveOverloading; - this.nameFactory = nameFactory; - this.descriptorMap = descriptorMap; - } - - - // Implementations for MemberVisitor. - - public void visitAnyMember(Clazz clazz, Member member) - { - // Special cases: <clinit> and <init> are always kept unchanged. - // We can ignore them here. - String name = member.getName(clazz); - if (ClassUtil.isInitializer(name)) - { - return; - } - - // Get the member's descriptor. - String descriptor = member.getDescriptor(clazz); - - // Check whether we're allowed to do aggressive overloading - if (!allowAggressiveOverloading) - { - // Trim the return argument from the descriptor if not. - // Works for fields and methods alike. - descriptor = descriptor.substring(0, descriptor.indexOf(')')+1); - } - - // Get the name map, creating a new one if necessary. - Map nameMap = retrieveNameMap(descriptorMap, descriptor); - - // Get the member's new name. - String newName = newMemberName(member); - - // Assign a new one, if necessary. - if (newName == null) - { - // Find an acceptable new name. - nameFactory.reset(); - - do - { - newName = nameFactory.nextName(); - } - while (nameMap.containsKey(newName)); - - // Remember not to use the new name again in this name space. - nameMap.put(newName, name); - - // Assign the new name. - setNewMemberName(member, newName); - } - } - - - // Small utility methods. - - /** - * Gets the name map, based on the given map and a given descriptor. - * A new empty map is created if necessary. - * @param descriptorMap the map of descriptors to [new name - old name] maps. - * @param descriptor the class member descriptor. - * @return the corresponding name map. - */ - static Map retrieveNameMap(Map descriptorMap, String descriptor) - { - // See if we can find the nested map with this descriptor key. - Map nameMap = (Map)descriptorMap.get(descriptor); - - // Create a new one if not. - if (nameMap == null) - { - nameMap = new HashMap(); - descriptorMap.put(descriptor, nameMap); - } - - return nameMap; - } - - - /** - * Assigns a fixed new name to the given class member. - * @param member the class member. - * @param name the new name. - */ - static void setFixedNewMemberName(Member member, String name) - { - VisitorAccepter lastVisitorAccepter = MethodLinker.lastVisitorAccepter(member); - - if (!(lastVisitorAccepter instanceof LibraryMember) && - !(lastVisitorAccepter instanceof MyFixedName)) - { - lastVisitorAccepter.setVisitorInfo(new MyFixedName(name)); - } - else - { - lastVisitorAccepter.setVisitorInfo(name); - } - } - - - /** - * Assigns a new name to the given class member. - * @param member the class member. - * @param name the new name. - */ - static void setNewMemberName(Member member, String name) - { - MethodLinker.lastVisitorAccepter(member).setVisitorInfo(name); - } - - - /** - * Returns whether the new name of the given class member is fixed. - * @param member the class member. - * @return whether its new name is fixed. - */ - static boolean hasFixedNewMemberName(Member member) - { - VisitorAccepter lastVisitorAccepter = MethodLinker.lastVisitorAccepter(member); - - return lastVisitorAccepter instanceof LibraryMember || - lastVisitorAccepter instanceof MyFixedName; - } - - - /** - * Retrieves the new name of the given class member. - * @param member the class member. - * @return the class member's new name, or <code>null</code> if it doesn't - * have one yet. - */ - static String newMemberName(Member member) - { - return (String)MethodLinker.lastVisitorAccepter(member).getVisitorInfo(); - } - - - /** - * This VisitorAccepter can be used to wrap a name string, to indicate that - * the name is fixed. - */ - private static class MyFixedName implements VisitorAccepter - { - private String newName; - - - public MyFixedName(String newName) - { - this.newName = newName; - } - - - // Implementations for VisitorAccepter. - - public Object getVisitorInfo() - { - return newName; - } - - - public void setVisitorInfo(Object visitorInfo) - { - newName = (String)visitorInfo; - } - } -} |