444 Zeilen
21 KiB
Diff
444 Zeilen
21 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Nassim Jahnke <nassim@njahnke.dev>
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Date: Sun, 30 Oct 2022 23:47:26 +0100
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Subject: [PATCH] Remap reflection calls in plugins using internals
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Co-authored-by: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
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diff --git a/build.gradle.kts b/build.gradle.kts
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index 5ffd1d7c130e01a4a7516b361e48bfaf41d4f321..e9498f78cb6c0973a820f093ff7a31bef44ba27f 100644
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--- a/build.gradle.kts
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+++ b/build.gradle.kts
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@@ -47,6 +47,12 @@ dependencies {
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testImplementation("org.junit-pioneer:junit-pioneer:2.2.0") // Paper - CartesianTest
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implementation("net.neoforged:srgutils:1.0.9") // Paper - mappings handling
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implementation("net.neoforged:AutoRenamingTool:2.0.3") // Paper - remap plugins
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+ // Paper start - Remap reflection
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+ val reflectionRewriterVersion = "0.0.1"
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+ implementation("io.papermc:reflection-rewriter:$reflectionRewriterVersion")
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+ implementation("io.papermc:reflection-rewriter-runtime:$reflectionRewriterVersion")
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+ implementation("io.papermc:reflection-rewriter-proxy-generator:$reflectionRewriterVersion")
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+ // Paper end - Remap reflection
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}
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paperweight {
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diff --git a/src/main/java/io/papermc/paper/configuration/serializer/PacketClassSerializer.java b/src/main/java/io/papermc/paper/configuration/serializer/PacketClassSerializer.java
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index 893ad5e7c2d32ccd64962d95d146bbd317c28ab8..3d73ea0e63c97b2b08e719b7be7af3894fb2d4e8 100644
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--- a/src/main/java/io/papermc/paper/configuration/serializer/PacketClassSerializer.java
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+++ b/src/main/java/io/papermc/paper/configuration/serializer/PacketClassSerializer.java
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@@ -5,6 +5,7 @@ import com.google.common.collect.ImmutableBiMap;
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import com.mojang.logging.LogUtils;
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import io.leangen.geantyref.TypeToken;
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import io.papermc.paper.configuration.serializer.collections.MapSerializer;
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+import io.papermc.paper.util.MappingEnvironment;
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import io.papermc.paper.util.ObfHelper;
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import net.minecraft.network.protocol.Packet;
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import org.checkerframework.checker.nullness.qual.Nullable;
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@@ -69,7 +70,7 @@ public final class PacketClassSerializer extends ScalarSerializer<Class<? extend
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@Override
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protected @Nullable Object serialize(final Class<? extends Packet<?>> packetClass, final Predicate<Class<?>> typeSupported) {
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final String name = packetClass.getName();
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- @Nullable String mojName = ObfHelper.INSTANCE.mappingsByMojangName() == null ? name : MOJANG_TO_OBF.inverse().get(name); // if the mappings are null, running on moj-mapped server
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+ @Nullable String mojName = ObfHelper.INSTANCE.mappingsByMojangName() == null || !MappingEnvironment.reobf() ? name : MOJANG_TO_OBF.inverse().get(name); // if the mappings are null, running on moj-mapped server
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if (mojName == null && MOJANG_TO_OBF.containsKey(name)) {
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mojName = name;
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}
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diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperClassloaderBytecodeModifier.java b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperClassloaderBytecodeModifier.java
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index f9a2c55a354c877749db3f92956de802ae575788..39182cdd17473da0123dc7172dce507eab29fedc 100644
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--- a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperClassloaderBytecodeModifier.java
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+++ b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperClassloaderBytecodeModifier.java
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@@ -1,12 +1,17 @@
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package io.papermc.paper.plugin.entrypoint.classloader;
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import io.papermc.paper.plugin.configuration.PluginMeta;
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+import org.objectweb.asm.ClassReader;
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+import org.objectweb.asm.ClassWriter;
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// Stub, implement in future.
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public class PaperClassloaderBytecodeModifier implements ClassloaderBytecodeModifier {
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@Override
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public byte[] modify(PluginMeta configuration, byte[] bytecode) {
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- return bytecode;
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+ ClassReader classReader = new ClassReader(bytecode);
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+ ClassWriter classWriter = new ClassWriter(classReader, 0);
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+ classReader.accept(io.papermc.paper.pluginremap.reflect.ReflectionRemapper.visitor(classWriter), 0);
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+ return classWriter.toByteArray();
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}
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}
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diff --git a/src/main/java/io/papermc/paper/pluginremap/reflect/PaperReflection.java b/src/main/java/io/papermc/paper/pluginremap/reflect/PaperReflection.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..c653d1f5af8b407cfba715e6027dbb695046892a
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/pluginremap/reflect/PaperReflection.java
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@@ -0,0 +1,212 @@
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+package io.papermc.paper.pluginremap.reflect;
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+
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+import com.mojang.logging.LogUtils;
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+import io.papermc.paper.util.MappingEnvironment;
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+import io.papermc.paper.util.ObfHelper;
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+import io.papermc.reflectionrewriter.runtime.AbstractDefaultRulesReflectionProxy;
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+import io.papermc.reflectionrewriter.runtime.DefineClassReflectionProxy;
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+import java.lang.invoke.MethodHandles;
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+import java.nio.ByteBuffer;
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+import java.security.CodeSource;
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+import java.security.ProtectionDomain;
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+import java.util.Map;
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+import java.util.Objects;
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+import java.util.stream.Collectors;
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+import org.checkerframework.checker.nullness.qual.NonNull;
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+import org.checkerframework.checker.nullness.qual.Nullable;
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+import org.checkerframework.framework.qual.DefaultQualifier;
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+import org.objectweb.asm.ClassReader;
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+import org.objectweb.asm.ClassWriter;
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+import org.slf4j.Logger;
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+
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+// todo proper inheritance handling
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+@SuppressWarnings("unused")
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+@DefaultQualifier(NonNull.class)
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+public final class PaperReflection extends AbstractDefaultRulesReflectionProxy implements DefineClassReflectionProxy {
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+ // concat to avoid being rewritten by shadow
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+ private static final Logger LOGGER = LogUtils.getLogger();
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+ private static final String CB_PACKAGE_PREFIX = "org.bukkit.".concat("craftbukkit.");
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+ private static final String LEGACY_CB_PACKAGE_PREFIX = "org.bukkit.".concat("craftbukkit.") + MappingEnvironment.LEGACY_CB_VERSION + ".";
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+
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+ private final DefineClassReflectionProxy defineClassProxy;
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+ private final Map<String, ObfHelper.ClassMapping> mappingsByMojangName;
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+ private final Map<String, ObfHelper.ClassMapping> mappingsByObfName;
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+ // Reflection does not care about method return values, so this map removes the return value descriptor from the key
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+ private final Map<String, Map<String, String>> strippedMethodMappings;
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+
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+ PaperReflection() {
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+ this.defineClassProxy = DefineClassReflectionProxy.create(PaperReflection::processClass);
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+ if (!MappingEnvironment.hasMappings()) {
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+ this.mappingsByMojangName = Map.of();
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+ this.mappingsByObfName = Map.of();
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+ this.strippedMethodMappings = Map.of();
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+ return;
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+ }
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+ final ObfHelper obfHelper = ObfHelper.INSTANCE;
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+ this.mappingsByMojangName = Objects.requireNonNull(obfHelper.mappingsByMojangName(), "mappingsByMojangName");
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+ this.mappingsByObfName = Objects.requireNonNull(obfHelper.mappingsByObfName(), "mappingsByObfName");
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+ this.strippedMethodMappings = this.mappingsByMojangName.entrySet().stream().collect(Collectors.toUnmodifiableMap(
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+ Map.Entry::getKey,
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+ entry -> entry.getValue().strippedMethods()
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+ ));
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+ }
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+
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+ @Override
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+ protected String mapClassName(final String name) {
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+ final ObfHelper.@Nullable ClassMapping mapping = this.mappingsByObfName.get(name);
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+ return mapping != null ? mapping.mojangName() : removeCraftBukkitRelocation(name);
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+ }
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+
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+ @Override
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+ protected String mapDeclaredMethodName(final Class<?> clazz, final String name, final Class<?>... parameterTypes) {
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+ final @Nullable Map<String, String> mapping = this.strippedMethodMappings.get(clazz.getName());
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+ if (mapping == null) {
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+ return name;
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+ }
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+ return mapping.getOrDefault(strippedMethodKey(name, parameterTypes), name);
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+ }
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+
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+ @Override
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+ protected String mapMethodName(final Class<?> clazz, final String name, final Class<?>... parameterTypes) {
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+ final @Nullable String mapped = this.findMappedMethodName(clazz, name, parameterTypes);
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+ return mapped != null ? mapped : name;
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+ }
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+
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+ @Override
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+ protected String mapDeclaredFieldName(final Class<?> clazz, final String name) {
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+ final ObfHelper.@Nullable ClassMapping mapping = this.mappingsByMojangName.get(clazz.getName());
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+ if (mapping == null) {
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+ return name;
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+ }
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+ return mapping.fieldsByObf().getOrDefault(name, name);
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+ }
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+
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+ @Override
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+ protected String mapFieldName(final Class<?> clazz, final String name) {
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+ final @Nullable String mapped = this.findMappedFieldName(clazz, name);
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+ return mapped != null ? mapped : name;
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+ }
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+
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+ private @Nullable String findMappedMethodName(final Class<?> clazz, final String name, final Class<?>... parameterTypes) {
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+ final Map<String, String> map = this.strippedMethodMappings.get(clazz.getName());
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+ @Nullable String mapped = null;
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+ if (map != null) {
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+ mapped = map.get(strippedMethodKey(name, parameterTypes));
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+ if (mapped != null) {
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+ return mapped;
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+ }
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+ }
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+ // JVM checks super before interfaces
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+ final Class<?> superClass = clazz.getSuperclass();
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+ if (superClass != null) {
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+ mapped = this.findMappedMethodName(superClass, name, parameterTypes);
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+ }
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+ if (mapped == null) {
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+ for (final Class<?> i : clazz.getInterfaces()) {
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+ mapped = this.findMappedMethodName(i, name, parameterTypes);
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+ if (mapped != null) {
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+ break;
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+ }
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+ }
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+ }
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+ return mapped;
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+ }
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+
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+ private @Nullable String findMappedFieldName(final Class<?> clazz, final String name) {
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+ final ObfHelper.ClassMapping mapping = this.mappingsByMojangName.get(clazz.getName());
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+ @Nullable String mapped = null;
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+ if (mapping != null) {
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+ mapped = mapping.fieldsByObf().get(name);
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+ if (mapped != null) {
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+ return mapped;
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+ }
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+ }
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+ // The JVM checks super before interfaces
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+ final Class<?> superClass = clazz.getSuperclass();
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+ if (superClass != null) {
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+ mapped = this.findMappedFieldName(superClass, name);
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+ }
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+ if (mapped == null) {
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+ for (final Class<?> i : clazz.getInterfaces()) {
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+ mapped = this.findMappedFieldName(i, name);
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+ if (mapped != null) {
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+ break;
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+ }
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+ }
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+ }
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+ return mapped;
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+ }
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+
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+ private static String strippedMethodKey(final String methodName, final Class<?>... parameterTypes) {
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+ return methodName + parameterDescriptor(parameterTypes);
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+ }
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+
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+ private static String parameterDescriptor(final Class<?>... parameterTypes) {
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+ final StringBuilder builder = new StringBuilder();
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+ builder.append('(');
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+ for (final Class<?> parameterType : parameterTypes) {
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+ builder.append(parameterType.descriptorString());
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+ }
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+ builder.append(')');
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+ return builder.toString();
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+ }
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+
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+ private static String removeCraftBukkitRelocation(final String name) {
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+ if (MappingEnvironment.hasMappings()) {
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+ // Relocation is applied in reobf, and when mappings are present they handle the relocation
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+ return name;
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+ }
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+ if (name.startsWith(LEGACY_CB_PACKAGE_PREFIX)) {
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+ return CB_PACKAGE_PREFIX + name.substring(LEGACY_CB_PACKAGE_PREFIX.length());
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+ }
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+ return name;
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+ }
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+
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+ @Override
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+ public Class<?> defineClass(final Object loader, final byte[] b, final int off, final int len) throws ClassFormatError {
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+ return this.defineClassProxy.defineClass(loader, b, off, len);
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+ }
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+
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+ @Override
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+ public Class<?> defineClass(final Object loader, final String name, final byte[] b, final int off, final int len) throws ClassFormatError {
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+ return this.defineClassProxy.defineClass(loader, name, b, off, len);
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+ }
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+
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+ @Override
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+ public Class<?> defineClass(final Object loader, final @Nullable String name, final byte[] b, final int off, final int len, final @Nullable ProtectionDomain protectionDomain) throws ClassFormatError {
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+ return this.defineClassProxy.defineClass(loader, name, b, off, len, protectionDomain);
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+ }
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+
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+ @Override
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+ public Class<?> defineClass(final Object loader, final String name, final ByteBuffer b, final ProtectionDomain protectionDomain) throws ClassFormatError {
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+ return this.defineClassProxy.defineClass(loader, name, b, protectionDomain);
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+ }
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+
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+ @Override
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+ public Class<?> defineClass(final Object secureLoader, final String name, final byte[] b, final int off, final int len, final CodeSource cs) {
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+ return this.defineClassProxy.defineClass(secureLoader, name, b, off, len, cs);
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+ }
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+
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+ @Override
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+ public Class<?> defineClass(final Object secureLoader, final String name, final ByteBuffer b, final CodeSource cs) {
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+ return this.defineClassProxy.defineClass(secureLoader, name, b, cs);
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+ }
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+
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+ @Override
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+ public Class<?> defineClass(final MethodHandles.Lookup lookup, final byte[] bytes) throws IllegalAccessException {
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+ return this.defineClassProxy.defineClass(lookup, bytes);
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+ }
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+
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+ // todo apply bytecode remap here as well
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+ private static byte[] processClass(final byte[] bytes) {
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+ try {
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+ final ClassReader reader = new ClassReader(bytes);
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+ final ClassWriter writer = new ClassWriter(reader, 0);
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+ reader.accept(ReflectionRemapper.visitor(writer), 0);
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+ return writer.toByteArray();
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+ } catch (final Exception ex) {
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+ LOGGER.warn("Failed to process class bytes", ex);
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+ return bytes;
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+ }
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+ }
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+}
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diff --git a/src/main/java/io/papermc/paper/pluginremap/reflect/ReflectionRemapper.java b/src/main/java/io/papermc/paper/pluginremap/reflect/ReflectionRemapper.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..5fa5868e82d1f00498d0c5771369e1718b2df4ee
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/pluginremap/reflect/ReflectionRemapper.java
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@@ -0,0 +1,54 @@
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+package io.papermc.paper.pluginremap.reflect;
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+
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+import io.papermc.asm.ClassInfoProvider;
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+import io.papermc.asm.RewriteRuleVisitorFactory;
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+import io.papermc.paper.util.MappingEnvironment;
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+import io.papermc.reflectionrewriter.BaseReflectionRules;
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+import io.papermc.reflectionrewriter.DefineClassRule;
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+import io.papermc.reflectionrewriter.proxygenerator.ProxyGenerator;
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+import java.lang.invoke.MethodHandles;
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+import java.lang.reflect.Method;
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+import org.checkerframework.checker.nullness.qual.NonNull;
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+import org.checkerframework.framework.qual.DefaultQualifier;
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+import org.objectweb.asm.ClassVisitor;
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+import org.objectweb.asm.Opcodes;
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+
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+@DefaultQualifier(NonNull.class)
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+public final class ReflectionRemapper {
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+ private static final String PAPER_REFLECTION_HOLDER = "io.papermc.paper.pluginremap.reflect.PaperReflectionHolder";
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+ private static final String PAPER_REFLECTION_HOLDER_DESC = PAPER_REFLECTION_HOLDER.replace('.', '/');
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+ private static final RewriteRuleVisitorFactory VISITOR_FACTORY = RewriteRuleVisitorFactory.create(
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+ Opcodes.ASM9,
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+ chain -> chain.then(new BaseReflectionRules(PAPER_REFLECTION_HOLDER).rules())
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+ .then(DefineClassRule.create(PAPER_REFLECTION_HOLDER_DESC, true)),
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+ ClassInfoProvider.basic()
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+ );
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+
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+ static {
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+ if (!MappingEnvironment.reobf()) {
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+ setupProxy();
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+ }
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+ }
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+
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+ private ReflectionRemapper() {
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+ }
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+
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+ public static ClassVisitor visitor(final ClassVisitor parent) {
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+ if (MappingEnvironment.reobf()) {
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+ return parent;
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+ }
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+ return VISITOR_FACTORY.createVisitor(parent);
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+ }
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+
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+ private static void setupProxy() {
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+ try {
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+ final byte[] bytes = ProxyGenerator.generateProxy(PaperReflection.class, PAPER_REFLECTION_HOLDER_DESC);
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+ final MethodHandles.Lookup lookup = MethodHandles.lookup();
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+ final Class<?> generated = lookup.defineClass(bytes);
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+ final Method init = generated.getDeclaredMethod("init", PaperReflection.class);
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+ init.invoke(null, new PaperReflection());
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+ } catch (final ReflectiveOperationException ex) {
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+ throw new RuntimeException(ex);
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+ }
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+ }
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+}
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diff --git a/src/main/java/io/papermc/paper/util/MappingEnvironment.java b/src/main/java/io/papermc/paper/util/MappingEnvironment.java
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index 8e4229634d41a42b3d93948eebb77def7c0c72b1..38745299ea49f253a410e77557100903ecb472b0 100644
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--- a/src/main/java/io/papermc/paper/util/MappingEnvironment.java
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+++ b/src/main/java/io/papermc/paper/util/MappingEnvironment.java
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@@ -10,6 +10,7 @@ import org.checkerframework.framework.qual.DefaultQualifier;
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@DefaultQualifier(NonNull.class)
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public final class MappingEnvironment {
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+ public static final String LEGACY_CB_VERSION = "v1_20_R4";
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private static final @Nullable String MAPPINGS_HASH = readMappingsHash();
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private static final boolean REOBF = checkReobf();
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diff --git a/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java b/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
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index 242811578a786e3807a1a7019d472d5a68f87116..0b65fdf53124f3dd042b2363b1b8df8e1ca7de00 100644
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--- a/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
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+++ b/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
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@@ -29,6 +29,9 @@ public enum StacktraceDeobfuscator {
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});
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public void deobfuscateThrowable(final Throwable throwable) {
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+ if (!MappingEnvironment.reobf()) {
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+ return;
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+ }
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if (GlobalConfiguration.get() != null && !GlobalConfiguration.get().logging.deobfuscateStacktraces) { // handle null as true
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return;
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}
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@@ -44,6 +47,9 @@ public enum StacktraceDeobfuscator {
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}
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public StackTraceElement[] deobfuscateStacktrace(final StackTraceElement[] traceElements) {
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+ if (!MappingEnvironment.reobf()) {
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+ return traceElements;
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+ }
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if (GlobalConfiguration.get() != null && !GlobalConfiguration.get().logging.deobfuscateStacktraces) { // handle null as true
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return traceElements;
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
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index 8420a53672cfb0f060d9c85c445d200b6701f521..fc04bfcb8b5dfa6d093c8d75b2f20c502ef94a63 100644
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--- a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
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+++ b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
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@@ -76,36 +76,26 @@ public class Commodore {
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private static final Map<String, RerouteMethodData> FIELD_RENAME_METHOD_REROUTE = Commodore.createReroutes(FieldRename.class);
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// Paper start - Plugin rewrites
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- private static final Map<String, String> SEARCH_AND_REMOVE = initReplacementsMap();
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- private static Map<String, String> initReplacementsMap() {
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- Map<String, String> getAndRemove = new HashMap<>();
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- // Be wary of maven shade's relocations
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-
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- final java.util.jar.Manifest manifest = io.papermc.paper.util.JarManifests.manifest(Commodore.class);
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- if (Boolean.getBoolean( "debug.rewriteForIde") && manifest != null)
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- {
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- // unversion incoming calls for pre-relocate debug work
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- final String NMS_REVISION_PACKAGE = "v" + manifest.getMainAttributes().getValue("CraftBukkit-Package-Version") + "/";
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-
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- getAndRemove.put("org/bukkit/".concat("craftbukkit/" + NMS_REVISION_PACKAGE), NMS_REVISION_PACKAGE);
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+ private static final String CB_PACKAGE_PREFIX = "org/bukkit/".concat("craftbukkit/");
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+ private static final String LEGACY_CB_PACKAGE_PREFIX = CB_PACKAGE_PREFIX + io.papermc.paper.util.MappingEnvironment.LEGACY_CB_VERSION + "/";
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+ private static String runtimeCbPkgPrefix() {
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+ if (io.papermc.paper.util.MappingEnvironment.reobf()) {
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+ return LEGACY_CB_PACKAGE_PREFIX;
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}
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-
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- return getAndRemove;
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+ return CB_PACKAGE_PREFIX;
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}
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@Nonnull
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private static String getOriginalOrRewrite(@Nonnull String original)
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{
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- String rewrite = null;
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- for ( Map.Entry<String, String> entry : SEARCH_AND_REMOVE.entrySet() )
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- {
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- if ( original.contains( entry.getKey() ) )
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- {
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- rewrite = original.replace( entry.getValue(), "" );
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+ // Relocation is applied in reobf, and when mappings are present they handle the relocation
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+ if (!io.papermc.paper.util.MappingEnvironment.reobf() && !io.papermc.paper.util.MappingEnvironment.hasMappings()) {
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+ if (original.contains(LEGACY_CB_PACKAGE_PREFIX)) {
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+ original = original.replace(LEGACY_CB_PACKAGE_PREFIX, CB_PACKAGE_PREFIX);
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}
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}
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- return rewrite != null ? rewrite : original;
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+ return original;
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}
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// Paper end - Plugin rewrites
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@@ -176,7 +166,7 @@ public class Commodore {
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ClassReader cr = new ClassReader(b);
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ClassWriter cw = new ClassWriter(cr, 0);
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- cr.accept(new ClassRemapper(new ClassVisitor(Opcodes.ASM9, cw) {
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+ cr.accept(new ClassRemapper(new ClassVisitor(Opcodes.ASM9, io.papermc.paper.pluginremap.reflect.ReflectionRemapper.visitor(cw)) { // Paper
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final Set<RerouteMethodData> rerouteMethodData = new HashSet<>();
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String className;
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boolean isInterface;
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