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Get mapping reversal working

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TheKodeToad 2024-05-12 23:00:42 +01:00
parent 29abf83418
commit 361b9d62f3
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GPG key ID: 5E39D70B4C93C38E
7 changed files with 148 additions and 76 deletions
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8
src/main/java/io/github/moehreag/mojmap_patcher/MojMapPatcher.java
View file

@ -14,7 +14,13 @@ public class MojMapPatcher {
}
MojmapProvider.get(version).map(ProguardParser::read).ifPresent(s -> {
//s.getClassFields().keySet().forEach(System.out::println);
s.classFields().get("net.minecraft.client.Minecraft").forEach((s1, s2) -> System.out.println(s1 + " -> " + s2));
String mcObf = s.classes().get("net/minecraft/client/Minecraft");
s = s.reverse();
s.fields()
.entrySet()
.stream()
.filter(entry -> entry.getKey().owner().equals(mcObf))
.forEach(entry -> System.out.println(entry.getKey() + " -> " + entry.getValue()));
});
}
}

45
src/main/java/io/github/moehreag/mojmap_patcher/api/Mapper.java
View file

@ -1,8 +1,7 @@
package io.github.moehreag.mojmap_patcher.api;
import io.github.moehreag.mojmap_patcher.api.data.MappingData;
import io.github.moehreag.mojmap_patcher.api.data.Field;
import io.github.moehreag.mojmap_patcher.api.data.Method;
import io.github.moehreag.mojmap_patcher.api.data.Member;
import org.objectweb.asm.commons.Remapper;
import java.util.Collections;
@ -17,54 +16,18 @@ public class Mapper extends Remapper {
throw new UnsupportedOperationException("TODO");
}
public String mapClass(String name) {
return data.classes().getOrDefault(name, name);
}
private Optional<Method> mapMethodInternal(String owner, String name, String descriptor) {
for (Map.Entry<Method, Method> entry : data.classMethods().getOrDefault(owner, Collections.emptyMap()).entrySet()) {
Method from = entry.getKey();
Method to = entry.getValue();
if (from.name().equals(name) && from.descriptor().equals(descriptor)) {
return Optional.of(to);
}
}
return Optional.empty();
}
public Method mapMethod(String owner, String name, String descriptor) {
return mapMethodInternal(owner, name, descriptor).orElse(null);
}
private Optional<Field> mapFieldInternal(String owner, String name, String descriptor) {
for (Map.Entry<Field, Field> entry : data.classFields().getOrDefault(owner, Collections.emptyMap()).entrySet()) {
Field from = entry.getKey();
Field to = entry.getValue();
if (from.name().equals(name) && from.descriptor().equals(descriptor)) {
return Optional.of(to);
}
}
return Optional.empty();
}
public Field mapField(String owner, String name, String descriptor) {
return mapFieldInternal(owner, name, descriptor).orElse(null);
}
@Override
public String map(String internalName) {
return mapClass(internalName);
return data.classes().get(internalName);
}
@Override
public String mapMethodName(String owner, String name, String descriptor) {
return mapMethodInternal(owner, name, descriptor).map(Method::name).orElse(name);
return data.methods().get(new Member(owner, name, descriptor));
}
@Override
public String mapFieldName(String owner, String name, String descriptor) {
return mapFieldInternal(owner, name, descriptor).map(Field::name).orElse(name);
return data.fields().get(new Member(owner, name, descriptor));
}
}

4
src/main/java/io/github/moehreag/mojmap_patcher/api/data/Field.java
View file

@ -1,4 +0,0 @@
package io.github.moehreag.mojmap_patcher.api.data;
public record Field(String name, String descriptor) {
}

61
src/main/java/io/github/moehreag/mojmap_patcher/api/data/MappingData.java
View file

@ -1,17 +1,66 @@
package io.github.moehreag.mojmap_patcher.api.data;
import org.objectweb.asm.Type;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
public record MappingData(
// IntelliJank, stop putting 8 spaces >:(
Map<String, String> classes,
Map<String, Map<Method, Method>> classMethods,
Map<String, Map<Field, Field>> classFields
) {
public record MappingData(Map<String, String> classes, Map<Member, String> methods, Map<Member, String> fields) {
public MappingData() {
this(new HashMap<>(), new HashMap<>(), new HashMap<>());
}
public MappingData reverse() {
Map<String, String> classesReversed = new HashMap<>();
Map<Member, String> methodsReversed = new HashMap<>();
Map<Member, String> fieldsReversed = new HashMap<>();
for (Map.Entry<String, String> clazz : classes.entrySet())
classesReversed.put(clazz.getValue(), clazz.getValue());
for (Map.Entry<Member, String> method : methods.entrySet()) {
methodsReversed.put(
new Member(
classes.getOrDefault(method.getKey().owner(), method.getKey().owner()),
method.getValue(),
remapType(Type.getType(method.getKey().descriptor())).getDescriptor()
),
method.getKey().name()
);
}
for (Map.Entry<Member, String> field : fields.entrySet()) {
fieldsReversed.put(
new Member(
classes.getOrDefault(field.getKey().owner(), field.getKey().owner()),
field.getValue(),
remapType(Type.getType(field.getKey().descriptor())).getDescriptor()
),
field.getKey().name()
);
}
return new MappingData(classesReversed, methodsReversed, fieldsReversed);
}
private Type remapType(Type type) {
switch (type.getSort()) {
case Type.OBJECT:
return Type.getObjectType(classes.getOrDefault(type.getInternalName(), type.getInternalName()));
case Type.ARRAY:
return Type.getObjectType(
"[".repeat(type.getDimensions()) + remapType(type.getElementType()).getDescriptor()
);
case Type.METHOD:
return Type.getMethodType(
remapType(type.getReturnType()),
Arrays.stream(type.getArgumentTypes()).map(this::remapType).toArray(Type[]::new)
);
default:
return type;
}
}
}

4
src/main/java/io/github/moehreag/mojmap_patcher/api/data/Member.java Normal file
View file

@ -0,0 +1,4 @@
package io.github.moehreag.mojmap_patcher.api.data;
public record Member(String owner, String name, String descriptor) {
}

4
src/main/java/io/github/moehreag/mojmap_patcher/api/data/Method.java
View file

@ -1,4 +0,0 @@
package io.github.moehreag.mojmap_patcher.api.data;
public record Method(int startLine, int endLine, String returnType, String name, String descriptor) {
}

98
src/main/java/io/github/moehreag/mojmap_patcher/parser/ProguardParser.java
View file

@ -1,11 +1,14 @@
package io.github.moehreag.mojmap_patcher.parser;
import io.github.moehreag.mojmap_patcher.Constants;
import io.github.moehreag.mojmap_patcher.api.data.Field;
import io.github.moehreag.mojmap_patcher.api.data.Member;
import io.github.moehreag.mojmap_patcher.api.data.MappingData;
import io.github.moehreag.mojmap_patcher.api.data.Method;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;
public class ProguardParser {
@ -15,32 +18,87 @@ public class ProguardParser {
MappingData data = new MappingData();
String currentClass = null;
for (String line : lines) {
if (line.startsWith("#")) { // Filter out comments
if (line.contains("#")) {
line = line.substring(0, line.indexOf('#'));
}
line = line.trim();
if (line.isEmpty()) {
continue;
}
String[] mapping = line.split("->");
String deobf = mapping[0].trim();
String obf = mapping[1].trim();
if (line.startsWith(" ")) { // It's a field/method mapping
if (currentClass == null) {
throw new IllegalStateException("Field/Method mapping outside a class");
int arrowIndex = line.indexOf("->");
if (arrowIndex == -1) {
throw new IllegalStateException("Missing arrow in mapping");
}
if (Constants.METHOD_PATTERN.matcher(deobf).matches()) {
String[] method = deobf.split(":");
String[] descriptor = method[2].split(" ");
int bracket = descriptor[1].indexOf("(");
data.classMethods().computeIfAbsent(currentClass, s -> new HashMap<>()).put(new Method(Integer.parseInt(method[0]), Integer.parseInt(method[1]), obf, descriptor[1].substring(0, bracket), descriptor[1].substring(bracket + 1)),
new Method(Integer.parseInt(method[0]), Integer.parseInt(method[1]), descriptor[0], descriptor[1].substring(0, bracket), descriptor[1].substring(bracket + 1)));
String obf = line.substring(0, arrowIndex).trim();
String deobf = line.substring(arrowIndex + 2).trim();
if (line.endsWith(":")) {
deobf = deobf.substring(0, deobf.length() - 1);
currentClass = obf.replace('.', '/');
data.classes().put(currentClass, deobf.replace('.', '/'));
} else {
String[] field = deobf.split(" ");
data.classFields().computeIfAbsent(currentClass, s -> new HashMap<>()).put(new Field(field[1], obf), new Field(field[1], field[0]));
if (currentClass == null) {
throw new IllegalStateException("Member mapping specified before a class");
}
} else { // It's a class mapping
currentClass = deobf;
data.classes().put(obf, deobf);
int spaceIndex = obf.indexOf(' ');
if (spaceIndex == -1) {
throw new IllegalStateException("Missing member signature");
}
String type = obf.substring(0, spaceIndex);
String signature = obf.substring(spaceIndex + 1);
int colonIndex = type.lastIndexOf(':');
if (colonIndex != -1)
type = type.substring(colonIndex + 1);
if (signature.contains("(") && signature.endsWith(")")) {
// method
String name = signature.substring(0, signature.indexOf('('));
String args = signature.substring(signature.indexOf('(') + 1, signature.length() - 1);
StringBuilder descriptor = new StringBuilder();
descriptor.append('(');
if (!args.isEmpty()) {
for (String arg : args.split(",")) {
descriptor.append(convertType(arg));
}
}
descriptor.append(')');
descriptor.append(convertType(type));
data.methods().put(new Member(currentClass, name, descriptor.toString()), deobf);
} else
data.fields().put(new Member(currentClass, signature, convertType(type)), deobf);
}
}
return data;
}
private static String convertType(String type) {
int dimensions = 0;
while (type.endsWith("[]")) {
type = type.substring(0, type.length() - 2);
++dimensions;
}
String result = switch (type) {
case "void" -> "V";
case "boolean" -> "Z";
case "byte" -> "B";
case "short" -> "S";
case "int" -> "I";
case "long" -> "J";
case "float" -> "F";
case "double" -> "D";
case "char" -> "C";
default -> 'L' + type.replace('.', '/') + ';';
};
return "[".repeat(dimensions) + result;
}
}