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e1c0033552
Paper/patches/server/0022-Remap-reflection-calls-in-plugins-using-internals.patch
Bjarne Koll e1c0033552
Updated Upstream (Bukkit/CraftBukkit) 
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
2b4b6d14 PR-1023: Convert InventoryView to interface

CraftBukkit Changes:
68603b1c1 Use expanded interaction ranges for traced interact events
eae9f760c PR-1414: Convert InventoryView to interface
ee9eafe67 Fix Implementation for DamageSource#isIndirect for internal custom causing entity
2024-06-16 17:23:42 +02:00

729 Zeilen
34 KiB
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Originalformat Blame Verlauf

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <nassim@njahnke.dev>
Date: Sun, 30 Oct 2022 23:47:26 +0100
Subject: [PATCH] Remap reflection calls in plugins using internals
Co-authored-by: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
diff --git a/build.gradle.kts b/build.gradle.kts
index 8350fc099b68918fb03a21b6a5047ceee72dcbb4..708448e071ddb5558658d3096b1d7ee2593ec8c5 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -47,6 +47,12 @@ dependencies {
testImplementation("org.junit-pioneer:junit-pioneer:2.2.0") // Paper - CartesianTest
implementation("net.neoforged:srgutils:1.0.9") // Paper - mappings handling
implementation("net.neoforged:AutoRenamingTool:2.0.3") // Paper - remap plugins
+ // Paper start - Remap reflection
+ val reflectionRewriterVersion = "0.0.1"
+ implementation("io.papermc:reflection-rewriter:$reflectionRewriterVersion")
+ implementation("io.papermc:reflection-rewriter-runtime:$reflectionRewriterVersion")
+ implementation("io.papermc:reflection-rewriter-proxy-generator:$reflectionRewriterVersion")
+ // Paper end - Remap reflection
}
paperweight {
diff --git a/src/main/java/io/papermc/paper/configuration/serializer/PacketClassSerializer.java b/src/main/java/io/papermc/paper/configuration/serializer/PacketClassSerializer.java
index 893ad5e7c2d32ccd64962d95d146bbd317c28ab8..3d73ea0e63c97b2b08e719b7be7af3894fb2d4e8 100644
--- a/src/main/java/io/papermc/paper/configuration/serializer/PacketClassSerializer.java
+++ b/src/main/java/io/papermc/paper/configuration/serializer/PacketClassSerializer.java
@@ -5,6 +5,7 @@ import com.google.common.collect.ImmutableBiMap;
import com.mojang.logging.LogUtils;
import io.leangen.geantyref.TypeToken;
import io.papermc.paper.configuration.serializer.collections.MapSerializer;
+import io.papermc.paper.util.MappingEnvironment;
import io.papermc.paper.util.ObfHelper;
import net.minecraft.network.protocol.Packet;
import org.checkerframework.checker.nullness.qual.Nullable;
@@ -69,7 +70,7 @@ public final class PacketClassSerializer extends ScalarSerializer<Class<? extend
@Override
protected @Nullable Object serialize(final Class<? extends Packet<?>> packetClass, final Predicate<Class<?>> typeSupported) {
final String name = packetClass.getName();
- @Nullable String mojName = ObfHelper.INSTANCE.mappingsByMojangName() == null ? name : MOJANG_TO_OBF.inverse().get(name); // if the mappings are null, running on moj-mapped server
+ @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
if (mojName == null && MOJANG_TO_OBF.containsKey(name)) {
mojName = name;
}
diff --git a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/BytecodeModifyingURLClassLoader.java b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/BytecodeModifyingURLClassLoader.java
new file mode 100644
index 0000000000000000000000000000000000000000..1240c061c121e8d5eb9add4e5e21955ee6df9368
--- /dev/null
+++ b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/BytecodeModifyingURLClassLoader.java
@@ -0,0 +1,187 @@
+package io.papermc.paper.plugin.entrypoint.classloader;
+
+import io.papermc.paper.pluginremap.reflect.ReflectionRemapper;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.net.JarURLConnection;
+import java.net.URI;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.security.CodeSigner;
+import java.security.CodeSource;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;
+import java.util.jar.Attributes;
+import java.util.jar.Manifest;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.ClassWriter;
+
+import static java.util.Objects.requireNonNullElse;
+
+public final class BytecodeModifyingURLClassLoader extends URLClassLoader {
+ static {
+ ClassLoader.registerAsParallelCapable();
+ }
+
+ private static final Object MISSING_MANIFEST = new Object();
+
+ private final Function<byte[], byte[]> modifier;
+ private final Map<String, Object> manifests = new ConcurrentHashMap<>();
+
+ public BytecodeModifyingURLClassLoader(
+ final URL[] urls,
+ final ClassLoader parent,
+ final Function<byte[], byte[]> modifier
+ ) {
+ super(urls, parent);
+ this.modifier = modifier;
+ }
+
+ public BytecodeModifyingURLClassLoader(
+ final URL[] urls,
+ final ClassLoader parent
+ ) {
+ this(urls, parent, bytes -> {
+ final ClassReader classReader = new ClassReader(bytes);
+ final ClassWriter classWriter = new ClassWriter(classReader, 0);
+ final ClassVisitor visitor = ReflectionRemapper.visitor(classWriter);
+ if (visitor == classWriter) {
+ return bytes;
+ }
+ classReader.accept(visitor, 0);
+ return classWriter.toByteArray();
+ });
+ }
+
+ @Override
+ protected Class<?> findClass(final String name) throws ClassNotFoundException {
+ final Class<?> result;
+ final String path = name.replace('.', '/').concat(".class");
+ final URL url = this.findResource(path);
+ if (url != null) {
+ try {
+ result = this.defineClass(name, url);
+ } catch (final IOException e) {
+ throw new ClassNotFoundException(name, e);
+ }
+ } else {
+ result = null;
+ }
+ if (result == null) {
+ throw new ClassNotFoundException(name);
+ }
+ return result;
+ }
+
+ private Class<?> defineClass(String name, URL url) throws IOException {
+ int i = name.lastIndexOf('.');
+ if (i != -1) {
+ String pkgname = name.substring(0, i);
+ // Check if package already loaded.
+ final @Nullable Manifest man = this.manifestFor(url);
+ final URL jarUrl = URI.create(jarName(url)).toURL();
+ if (this.getAndVerifyPackage(pkgname, man, jarUrl) == null) {
+ try {
+ if (man != null) {
+ this.definePackage(pkgname, man, jarUrl);
+ } else {
+ this.definePackage(pkgname, null, null, null, null, null, null, null);
+ }
+ } catch (IllegalArgumentException iae) {
+ // parallel-capable class loaders: re-verify in case of a
+ // race condition
+ if (this.getAndVerifyPackage(pkgname, man, jarUrl) == null) {
+ // Should never happen
+ throw new AssertionError("Cannot find package " +
+ pkgname);
+ }
+ }
+ }
+ }
+ final byte[] bytes;
+ try (final InputStream is = url.openStream()) {
+ bytes = is.readAllBytes();
+ }
+
+ final byte[] modified = this.modifier.apply(bytes);
+
+ final CodeSource cs = new CodeSource(url, (CodeSigner[]) null);
+ return this.defineClass(name, modified, 0, modified.length, cs);
+ }
+
+ private Package getAndVerifyPackage(
+ String pkgname,
+ Manifest man, URL url
+ ) {
+ Package pkg = getDefinedPackage(pkgname);
+ if (pkg != null) {
+ // Package found, so check package sealing.
+ if (pkg.isSealed()) {
+ // Verify that code source URL is the same.
+ if (!pkg.isSealed(url)) {
+ throw new SecurityException(
+ "sealing violation: package " + pkgname + " is sealed");
+ }
+ } else {
+ // Make sure we are not attempting to seal the package
+ // at this code source URL.
+ if ((man != null) && this.isSealed(pkgname, man)) {
+ throw new SecurityException(
+ "sealing violation: can't seal package " + pkgname +
+ ": already loaded");
+ }
+ }
+ }
+ return pkg;
+ }
+
+ private boolean isSealed(String name, Manifest man) {
+ Attributes attr = man.getAttributes(name.replace('.', '/').concat("/"));
+ String sealed = null;
+ if (attr != null) {
+ sealed = attr.getValue(Attributes.Name.SEALED);
+ }
+ if (sealed == null) {
+ if ((attr = man.getMainAttributes()) != null) {
+ sealed = attr.getValue(Attributes.Name.SEALED);
+ }
+ }
+ return "true".equalsIgnoreCase(sealed);
+ }
+
+ private @Nullable Manifest manifestFor(final URL url) throws IOException {
+ Manifest man = null;
+ if (url.getProtocol().equals("jar")) {
+ try {
+ final Object computedManifest = this.manifests.computeIfAbsent(jarName(url), $ -> {
+ try {
+ final Manifest m = ((JarURLConnection) url.openConnection()).getManifest();
+ return requireNonNullElse(m, MISSING_MANIFEST);
+ } catch (final IOException e) {
+ throw new UncheckedIOException(e);
+ }
+ });
+ if (computedManifest instanceof Manifest found) {
+ man = found;
+ }
+ } catch (final UncheckedIOException e) {
+ throw e.getCause();
+ } catch (final IllegalArgumentException e) {
+ throw new IOException(e);
+ }
+ }
+ return man;
+ }
+
+ private static String jarName(final URL sourceUrl) {
+ final int exclamationIdx = sourceUrl.getPath().lastIndexOf('!');
+ if (exclamationIdx != -1) {
+ return sourceUrl.getPath().substring(0, exclamationIdx);
+ }
+ throw new IllegalArgumentException("Could not find jar for URL " + sourceUrl);
+ }
+}
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
index f9a2c55a354c877749db3f92956de802ae575788..39182cdd17473da0123dc7172dce507eab29fedc 100644
--- a/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperClassloaderBytecodeModifier.java
+++ b/src/main/java/io/papermc/paper/plugin/entrypoint/classloader/PaperClassloaderBytecodeModifier.java
@@ -1,12 +1,17 @@
package io.papermc.paper.plugin.entrypoint.classloader;
import io.papermc.paper.plugin.configuration.PluginMeta;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassWriter;
// Stub, implement in future.
public class PaperClassloaderBytecodeModifier implements ClassloaderBytecodeModifier {
@Override
public byte[] modify(PluginMeta configuration, byte[] bytecode) {
- return bytecode;
+ ClassReader classReader = new ClassReader(bytecode);
+ ClassWriter classWriter = new ClassWriter(classReader, 0);
+ classReader.accept(io.papermc.paper.pluginremap.reflect.ReflectionRemapper.visitor(classWriter), 0);
+ return classWriter.toByteArray();
}
}
diff --git a/src/main/java/io/papermc/paper/plugin/loader/PaperClasspathBuilder.java b/src/main/java/io/papermc/paper/plugin/loader/PaperClasspathBuilder.java
index f576060c8fe872772bbafe2016fc9b83a3c095f1..f9d4b33050a6fe8c2dabe8e5eec075d95dc513e0 100644
--- a/src/main/java/io/papermc/paper/plugin/loader/PaperClasspathBuilder.java
+++ b/src/main/java/io/papermc/paper/plugin/loader/PaperClasspathBuilder.java
@@ -2,12 +2,12 @@ package io.papermc.paper.plugin.loader;
import io.papermc.paper.plugin.PluginInitializerManager;
import io.papermc.paper.plugin.bootstrap.PluginProviderContext;
+import io.papermc.paper.plugin.entrypoint.classloader.BytecodeModifyingURLClassLoader;
+import io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader;
import io.papermc.paper.plugin.loader.library.ClassPathLibrary;
import io.papermc.paper.plugin.loader.library.PaperLibraryStore;
-import io.papermc.paper.plugin.entrypoint.classloader.PaperPluginClassLoader;
import io.papermc.paper.plugin.provider.configuration.PaperPluginMeta;
-import org.jetbrains.annotations.NotNull;
-
+import io.papermc.paper.util.MappingEnvironment;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
@@ -17,6 +17,7 @@ import java.util.ArrayList;
import java.util.List;
import java.util.jar.JarFile;
import java.util.logging.Logger;
+import org.jetbrains.annotations.NotNull;
public class PaperClasspathBuilder implements PluginClasspathBuilder {
@@ -60,7 +61,10 @@ public class PaperClasspathBuilder implements PluginClasspathBuilder {
}
try {
- return new PaperPluginClassLoader(logger, source, jarFile, configuration, this.getClass().getClassLoader(), new URLClassLoader(urls, getClass().getClassLoader()));
+ final URLClassLoader libraryLoader = MappingEnvironment.DISABLE_PLUGIN_REWRITING
+ ? new URLClassLoader(urls, this.getClass().getClassLoader())
+ : new BytecodeModifyingURLClassLoader(urls, this.getClass().getClassLoader());
+ return new PaperPluginClassLoader(logger, source, jarFile, configuration, this.getClass().getClassLoader(), libraryLoader);
} catch (IOException exception) {
throw new RuntimeException(exception);
}
diff --git a/src/main/java/io/papermc/paper/plugin/provider/type/spigot/SpigotPluginProviderFactory.java b/src/main/java/io/papermc/paper/plugin/provider/type/spigot/SpigotPluginProviderFactory.java
index bdd9bc8a414719b9f1d6f01f90539ddb8603a878..fdb52ad85cfaa1d53aadcad72cec3d3c8c12c058 100644
--- a/src/main/java/io/papermc/paper/plugin/provider/type/spigot/SpigotPluginProviderFactory.java
+++ b/src/main/java/io/papermc/paper/plugin/provider/type/spigot/SpigotPluginProviderFactory.java
@@ -1,9 +1,12 @@
package io.papermc.paper.plugin.provider.type.spigot;
+import io.papermc.paper.plugin.entrypoint.classloader.BytecodeModifyingURLClassLoader;
import io.papermc.paper.plugin.provider.configuration.serializer.constraints.PluginConfigConstraints;
import io.papermc.paper.plugin.provider.type.PluginTypeFactory;
+import io.papermc.paper.util.MappingEnvironment;
import org.bukkit.plugin.InvalidDescriptionException;
import org.bukkit.plugin.PluginDescriptionFile;
+import org.bukkit.plugin.java.LibraryLoader;
import org.yaml.snakeyaml.error.YAMLException;
import java.io.IOException;
@@ -15,6 +18,12 @@ import java.util.jar.JarFile;
class SpigotPluginProviderFactory implements PluginTypeFactory<SpigotPluginProvider, PluginDescriptionFile> {
+ static {
+ if (!MappingEnvironment.DISABLE_PLUGIN_REWRITING) {
+ LibraryLoader.LIBRARY_LOADER_FACTORY = BytecodeModifyingURLClassLoader::new;
+ }
+ }
+
@Override
public SpigotPluginProvider build(JarFile file, PluginDescriptionFile configuration, Path source) throws InvalidDescriptionException {
// Copied from SimplePluginManager#loadPlugins
diff --git a/src/main/java/io/papermc/paper/pluginremap/reflect/PaperReflection.java b/src/main/java/io/papermc/paper/pluginremap/reflect/PaperReflection.java
new file mode 100644
index 0000000000000000000000000000000000000000..c653d1f5af8b407cfba715e6027dbb695046892a
--- /dev/null
+++ b/src/main/java/io/papermc/paper/pluginremap/reflect/PaperReflection.java
@@ -0,0 +1,212 @@
+package io.papermc.paper.pluginremap.reflect;
+
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.util.MappingEnvironment;
+import io.papermc.paper.util.ObfHelper;
+import io.papermc.reflectionrewriter.runtime.AbstractDefaultRulesReflectionProxy;
+import io.papermc.reflectionrewriter.runtime.DefineClassReflectionProxy;
+import java.lang.invoke.MethodHandles;
+import java.nio.ByteBuffer;
+import java.security.CodeSource;
+import java.security.ProtectionDomain;
+import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Collectors;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.framework.qual.DefaultQualifier;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassWriter;
+import org.slf4j.Logger;
+
+// todo proper inheritance handling
+@SuppressWarnings("unused")
+@DefaultQualifier(NonNull.class)
+public final class PaperReflection extends AbstractDefaultRulesReflectionProxy implements DefineClassReflectionProxy {
+ // concat to avoid being rewritten by shadow
+ private static final Logger LOGGER = LogUtils.getLogger();
+ private static final String CB_PACKAGE_PREFIX = "org.bukkit.".concat("craftbukkit.");
+ private static final String LEGACY_CB_PACKAGE_PREFIX = "org.bukkit.".concat("craftbukkit.") + MappingEnvironment.LEGACY_CB_VERSION + ".";
+
+ private final DefineClassReflectionProxy defineClassProxy;
+ private final Map<String, ObfHelper.ClassMapping> mappingsByMojangName;
+ private final Map<String, ObfHelper.ClassMapping> mappingsByObfName;
+ // Reflection does not care about method return values, so this map removes the return value descriptor from the key
+ private final Map<String, Map<String, String>> strippedMethodMappings;
+
+ PaperReflection() {
+ this.defineClassProxy = DefineClassReflectionProxy.create(PaperReflection::processClass);
+ if (!MappingEnvironment.hasMappings()) {
+ this.mappingsByMojangName = Map.of();
+ this.mappingsByObfName = Map.of();
+ this.strippedMethodMappings = Map.of();
+ return;
+ }
+ final ObfHelper obfHelper = ObfHelper.INSTANCE;
+ this.mappingsByMojangName = Objects.requireNonNull(obfHelper.mappingsByMojangName(), "mappingsByMojangName");
+ this.mappingsByObfName = Objects.requireNonNull(obfHelper.mappingsByObfName(), "mappingsByObfName");
+ this.strippedMethodMappings = this.mappingsByMojangName.entrySet().stream().collect(Collectors.toUnmodifiableMap(
+ Map.Entry::getKey,
+ entry -> entry.getValue().strippedMethods()
+ ));
+ }
+
+ @Override
+ protected String mapClassName(final String name) {
+ final ObfHelper.@Nullable ClassMapping mapping = this.mappingsByObfName.get(name);
+ return mapping != null ? mapping.mojangName() : removeCraftBukkitRelocation(name);
+ }
+
+ @Override
+ protected String mapDeclaredMethodName(final Class<?> clazz, final String name, final Class<?>... parameterTypes) {
+ final @Nullable Map<String, String> mapping = this.strippedMethodMappings.get(clazz.getName());
+ if (mapping == null) {
+ return name;
+ }
+ return mapping.getOrDefault(strippedMethodKey(name, parameterTypes), name);
+ }
+
+ @Override
+ protected String mapMethodName(final Class<?> clazz, final String name, final Class<?>... parameterTypes) {
+ final @Nullable String mapped = this.findMappedMethodName(clazz, name, parameterTypes);
+ return mapped != null ? mapped : name;
+ }
+
+ @Override
+ protected String mapDeclaredFieldName(final Class<?> clazz, final String name) {
+ final ObfHelper.@Nullable ClassMapping mapping = this.mappingsByMojangName.get(clazz.getName());
+ if (mapping == null) {
+ return name;
+ }
+ return mapping.fieldsByObf().getOrDefault(name, name);
+ }
+
+ @Override
+ protected String mapFieldName(final Class<?> clazz, final String name) {
+ final @Nullable String mapped = this.findMappedFieldName(clazz, name);
+ return mapped != null ? mapped : name;
+ }
+
+ private @Nullable String findMappedMethodName(final Class<?> clazz, final String name, final Class<?>... parameterTypes) {
+ final Map<String, String> map = this.strippedMethodMappings.get(clazz.getName());
+ @Nullable String mapped = null;
+ if (map != null) {
+ mapped = map.get(strippedMethodKey(name, parameterTypes));
+ if (mapped != null) {
+ return mapped;
+ }
+ }
+ // JVM checks super before interfaces
+ final Class<?> superClass = clazz.getSuperclass();
+ if (superClass != null) {
+ mapped = this.findMappedMethodName(superClass, name, parameterTypes);
+ }
+ if (mapped == null) {
+ for (final Class<?> i : clazz.getInterfaces()) {
+ mapped = this.findMappedMethodName(i, name, parameterTypes);
+ if (mapped != null) {
+ break;
+ }
+ }
+ }
+ return mapped;
+ }
+
+ private @Nullable String findMappedFieldName(final Class<?> clazz, final String name) {
+ final ObfHelper.ClassMapping mapping = this.mappingsByMojangName.get(clazz.getName());
+ @Nullable String mapped = null;
+ if (mapping != null) {
+ mapped = mapping.fieldsByObf().get(name);
+ if (mapped != null) {
+ return mapped;
+ }
+ }
+ // The JVM checks super before interfaces
+ final Class<?> superClass = clazz.getSuperclass();
+ if (superClass != null) {
+ mapped = this.findMappedFieldName(superClass, name);
+ }
+ if (mapped == null) {
+ for (final Class<?> i : clazz.getInterfaces()) {
+ mapped = this.findMappedFieldName(i, name);
+ if (mapped != null) {
+ break;
+ }
+ }
+ }
+ return mapped;
+ }
+
+ private static String strippedMethodKey(final String methodName, final Class<?>... parameterTypes) {
+ return methodName + parameterDescriptor(parameterTypes);
+ }
+
+ private static String parameterDescriptor(final Class<?>... parameterTypes) {
+ final StringBuilder builder = new StringBuilder();
+ builder.append('(');
+ for (final Class<?> parameterType : parameterTypes) {
+ builder.append(parameterType.descriptorString());
+ }
+ builder.append(')');
+ return builder.toString();
+ }
+
+ private static String removeCraftBukkitRelocation(final String name) {
+ if (MappingEnvironment.hasMappings()) {
+ // Relocation is applied in reobf, and when mappings are present they handle the relocation
+ return name;
+ }
+ if (name.startsWith(LEGACY_CB_PACKAGE_PREFIX)) {
+ return CB_PACKAGE_PREFIX + name.substring(LEGACY_CB_PACKAGE_PREFIX.length());
+ }
+ return name;
+ }
+
+ @Override
+ public Class<?> defineClass(final Object loader, final byte[] b, final int off, final int len) throws ClassFormatError {
+ return this.defineClassProxy.defineClass(loader, b, off, len);
+ }
+
+ @Override
+ public Class<?> defineClass(final Object loader, final String name, final byte[] b, final int off, final int len) throws ClassFormatError {
+ return this.defineClassProxy.defineClass(loader, name, b, off, len);
+ }
+
+ @Override
+ 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 {
+ return this.defineClassProxy.defineClass(loader, name, b, off, len, protectionDomain);
+ }
+
+ @Override
+ public Class<?> defineClass(final Object loader, final String name, final ByteBuffer b, final ProtectionDomain protectionDomain) throws ClassFormatError {
+ return this.defineClassProxy.defineClass(loader, name, b, protectionDomain);
+ }
+
+ @Override
+ public Class<?> defineClass(final Object secureLoader, final String name, final byte[] b, final int off, final int len, final CodeSource cs) {
+ return this.defineClassProxy.defineClass(secureLoader, name, b, off, len, cs);
+ }
+
+ @Override
+ public Class<?> defineClass(final Object secureLoader, final String name, final ByteBuffer b, final CodeSource cs) {
+ return this.defineClassProxy.defineClass(secureLoader, name, b, cs);
+ }
+
+ @Override
+ public Class<?> defineClass(final MethodHandles.Lookup lookup, final byte[] bytes) throws IllegalAccessException {
+ return this.defineClassProxy.defineClass(lookup, bytes);
+ }
+
+ // todo apply bytecode remap here as well
+ private static byte[] processClass(final byte[] bytes) {
+ try {
+ final ClassReader reader = new ClassReader(bytes);
+ final ClassWriter writer = new ClassWriter(reader, 0);
+ reader.accept(ReflectionRemapper.visitor(writer), 0);
+ return writer.toByteArray();
+ } catch (final Exception ex) {
+ LOGGER.warn("Failed to process class bytes", ex);
+ return bytes;
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/pluginremap/reflect/ReflectionRemapper.java b/src/main/java/io/papermc/paper/pluginremap/reflect/ReflectionRemapper.java
new file mode 100644
index 0000000000000000000000000000000000000000..5fa5868e82d1f00498d0c5771369e1718b2df4ee
--- /dev/null
+++ b/src/main/java/io/papermc/paper/pluginremap/reflect/ReflectionRemapper.java
@@ -0,0 +1,54 @@
+package io.papermc.paper.pluginremap.reflect;
+
+import io.papermc.asm.ClassInfoProvider;
+import io.papermc.asm.RewriteRuleVisitorFactory;
+import io.papermc.paper.util.MappingEnvironment;
+import io.papermc.reflectionrewriter.BaseReflectionRules;
+import io.papermc.reflectionrewriter.DefineClassRule;
+import io.papermc.reflectionrewriter.proxygenerator.ProxyGenerator;
+import java.lang.invoke.MethodHandles;
+import java.lang.reflect.Method;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.framework.qual.DefaultQualifier;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.Opcodes;
+
+@DefaultQualifier(NonNull.class)
+public final class ReflectionRemapper {
+ private static final String PAPER_REFLECTION_HOLDER = "io.papermc.paper.pluginremap.reflect.PaperReflectionHolder";
+ private static final String PAPER_REFLECTION_HOLDER_DESC = PAPER_REFLECTION_HOLDER.replace('.', '/');
+ private static final RewriteRuleVisitorFactory VISITOR_FACTORY = RewriteRuleVisitorFactory.create(
+ Opcodes.ASM9,
+ chain -> chain.then(new BaseReflectionRules(PAPER_REFLECTION_HOLDER).rules())
+ .then(DefineClassRule.create(PAPER_REFLECTION_HOLDER_DESC, true)),
+ ClassInfoProvider.basic()
+ );
+
+ static {
+ if (!MappingEnvironment.reobf()) {
+ setupProxy();
+ }
+ }
+
+ private ReflectionRemapper() {
+ }
+
+ public static ClassVisitor visitor(final ClassVisitor parent) {
+ if (MappingEnvironment.reobf()) {
+ return parent;
+ }
+ return VISITOR_FACTORY.createVisitor(parent);
+ }
+
+ private static void setupProxy() {
+ try {
+ final byte[] bytes = ProxyGenerator.generateProxy(PaperReflection.class, PAPER_REFLECTION_HOLDER_DESC);
+ final MethodHandles.Lookup lookup = MethodHandles.lookup();
+ final Class<?> generated = lookup.defineClass(bytes);
+ final Method init = generated.getDeclaredMethod("init", PaperReflection.class);
+ init.invoke(null, new PaperReflection());
+ } catch (final ReflectiveOperationException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/util/MappingEnvironment.java b/src/main/java/io/papermc/paper/util/MappingEnvironment.java
index 8e4229634d41a42b3d93948eebb77def7c0c72b1..4d57213c9917ea965bfe06a5d242e61422457ee2 100644
--- a/src/main/java/io/papermc/paper/util/MappingEnvironment.java
+++ b/src/main/java/io/papermc/paper/util/MappingEnvironment.java
@@ -10,6 +10,8 @@ import org.checkerframework.framework.qual.DefaultQualifier;
@DefaultQualifier(NonNull.class)
public final class MappingEnvironment {
+ public static final boolean DISABLE_PLUGIN_REWRITING = Boolean.getBoolean("paper.disable-plugin-rewriting");
+ public static final String LEGACY_CB_VERSION = "v1_20_R4";
private static final @Nullable String MAPPINGS_HASH = readMappingsHash();
private static final boolean REOBF = checkReobf();
diff --git a/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java b/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
index 242811578a786e3807a1a7019d472d5a68f87116..0b65fdf53124f3dd042b2363b1b8df8e1ca7de00 100644
--- a/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
+++ b/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
@@ -29,6 +29,9 @@ public enum StacktraceDeobfuscator {
});
public void deobfuscateThrowable(final Throwable throwable) {
+ if (!MappingEnvironment.reobf()) {
+ return;
+ }
if (GlobalConfiguration.get() != null && !GlobalConfiguration.get().logging.deobfuscateStacktraces) { // handle null as true
return;
}
@@ -44,6 +47,9 @@ public enum StacktraceDeobfuscator {
}
public StackTraceElement[] deobfuscateStacktrace(final StackTraceElement[] traceElements) {
+ if (!MappingEnvironment.reobf()) {
+ return traceElements;
+ }
if (GlobalConfiguration.get() != null && !GlobalConfiguration.get().logging.deobfuscateStacktraces) { // handle null as true
return traceElements;
}
diff --git a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
index 51452d8a8969a303be1be5851b251243a5944be3..8757d4de8a589355b83690d37d9e81ce3cc6ae32 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
@@ -86,36 +86,26 @@ public class Commodore {
private static final Map<String, RerouteMethodData> METHOD_REROUTE = Commodore.createReroutes(MethodRerouting.class);
// Paper start - Plugin rewrites
- private static final Map<String, String> SEARCH_AND_REMOVE = initReplacementsMap();
- private static Map<String, String> initReplacementsMap() {
- Map<String, String> getAndRemove = new HashMap<>();
- // Be wary of maven shade's relocations
-
- final java.util.jar.Manifest manifest = io.papermc.paper.util.JarManifests.manifest(Commodore.class);
- if (Boolean.getBoolean( "debug.rewriteForIde") && manifest != null)
- {
- // unversion incoming calls for pre-relocate debug work
- final String NMS_REVISION_PACKAGE = "v" + manifest.getMainAttributes().getValue("CraftBukkit-Package-Version") + "/";
-
- getAndRemove.put("org/bukkit/".concat("craftbukkit/" + NMS_REVISION_PACKAGE), NMS_REVISION_PACKAGE);
+ private static final String CB_PACKAGE_PREFIX = "org/bukkit/".concat("craftbukkit/");
+ private static final String LEGACY_CB_PACKAGE_PREFIX = CB_PACKAGE_PREFIX + io.papermc.paper.util.MappingEnvironment.LEGACY_CB_VERSION + "/";
+ private static String runtimeCbPkgPrefix() {
+ if (io.papermc.paper.util.MappingEnvironment.reobf()) {
+ return LEGACY_CB_PACKAGE_PREFIX;
}
-
- return getAndRemove;
+ return CB_PACKAGE_PREFIX;
}
@Nonnull
private static String getOriginalOrRewrite(@Nonnull String original)
{
- String rewrite = null;
- for ( Map.Entry<String, String> entry : SEARCH_AND_REMOVE.entrySet() )
- {
- if ( original.contains( entry.getKey() ) )
- {
- rewrite = original.replace( entry.getValue(), "" );
+ // Relocation is applied in reobf, and when mappings are present they handle the relocation
+ if (!io.papermc.paper.util.MappingEnvironment.reobf() && !io.papermc.paper.util.MappingEnvironment.hasMappings()) {
+ if (original.contains(LEGACY_CB_PACKAGE_PREFIX)) {
+ original = original.replace(LEGACY_CB_PACKAGE_PREFIX, CB_PACKAGE_PREFIX);
}
}
- return rewrite != null ? rewrite : original;
+ return original;
}
// Paper end - Plugin rewrites
@@ -186,7 +176,7 @@ public class Commodore {
ClassReader cr = new ClassReader(b);
ClassWriter cw = new ClassWriter(cr, 0);
- cr.accept(new ClassRemapper(new ClassVisitor(Opcodes.ASM9, cw) {
+ cr.accept(new ClassRemapper(new ClassVisitor(Opcodes.ASM9, io.papermc.paper.pluginremap.reflect.ReflectionRemapper.visitor(cw)) { // Paper
final Set<RerouteMethodData> rerouteMethodData = new HashSet<>();
String className;
boolean isInterface;
diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
index 297767f64c1a7c01cffd6d78e71b60746622f22e..d551c9d898d8b5128dfef84d206396c84072abe4 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
@@ -361,7 +361,7 @@ public final class CraftMagicNumbers implements UnsafeValues {
throw new InvalidPluginException("Plugin API version " + pdf.getAPIVersion() + " is lower than the minimum allowed version. Please update or replace it.");
}
- if (toCheck.isOlderThan(ApiVersion.FLATTENING)) {
+ if (!io.papermc.paper.util.MappingEnvironment.DISABLE_PLUGIN_REWRITING && toCheck.isOlderThan(ApiVersion.FLATTENING)) { // Paper
CraftLegacy.init();
}
@@ -376,6 +376,7 @@ public final class CraftMagicNumbers implements UnsafeValues {
@Override
public byte[] processClass(PluginDescriptionFile pdf, String path, byte[] clazz) {
+ if (io.papermc.paper.util.MappingEnvironment.DISABLE_PLUGIN_REWRITING) return clazz; // Paper
try {
clazz = Commodore.convert(clazz, pdf.getName(), ApiVersion.getOrCreateVersion(pdf.getAPIVersion()), ((CraftServer) Bukkit.getServer()).activeCompatibilities);
} catch (Exception ex) {
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