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Paper/patches/server/0022-Remap-reflection-calls-in-plugins-using-internals.patch
MiniDigger | Martin d8b66dd93d fix: move to jline-terminal-ffm on java 22+ and fall back to jni on 21, fixes #10405 
ffm requires 1) native access allowed (the jdk cracks down on undocumented native access in 22) and 2) reverting the default console back to java.base, so the internal jline doesnt take over
2024-11-18 17:01:08 +01:00

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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 24f3d0c96fe9d70b1a7cf528e09ebfc4366577ed..7aee6d9849f0a9c64db0368d2faa03c0633a72a4 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -62,6 +62,12 @@ 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 = "0.0.3"
+ 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..0e734c07dbe82ba4c319a237f9e79b08b57b997f 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
@@ -7,6 +7,6 @@ public class PaperClassloaderBytecodeModifier implements ClassloaderBytecodeModi
@Override
public byte[] modify(PluginMeta configuration, byte[] bytecode) {
- return bytecode;
+ return io.papermc.paper.pluginremap.reflect.ReflectionRemapper.processClass(bytecode);
}
}
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..f871a329eb52da077f58d0ceaaabd3349f84cad0 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_REMAPPING
+ ? 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..1bf0fa1530b8e5f94d726d0313b7a00f675b500c 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_REMAPPING) {
+ 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..92bc8e4933ff13764fa2ac7f3729216332e202c9
--- /dev/null
+++ b/src/main/java/io/papermc/paper/pluginremap/reflect/PaperReflection.java
@@ -0,0 +1,211 @@
+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.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<?> @Nullable ... 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<?> @Nullable ... 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<?> @Nullable ... 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<?> @Nullable ... parameterTypes) {
+ return methodName + parameterDescriptor(parameterTypes);
+ }
+
+ private static String parameterDescriptor(final Class<?> @Nullable ... parameterTypes) {
+ if (parameterTypes == null) {
+ // Null parameterTypes is treated as an empty array
+ return "()";
+ }
+ 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 {
+ return ReflectionRemapper.processClass(bytes);
+ } 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..a3045afbc0cc057e99189b909367b21cf6a9e03f
--- /dev/null
+++ b/src/main/java/io/papermc/paper/pluginremap/reflect/ReflectionRemapper.java
@@ -0,0 +1,66 @@
+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.ClassReader;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.ClassWriter;
+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() || MappingEnvironment.DISABLE_PLUGIN_REMAPPING) {
+ return parent;
+ }
+ return VISITOR_FACTORY.createVisitor(parent);
+ }
+
+ public static byte[] processClass(final byte[] bytes) {
+ if (MappingEnvironment.DISABLE_PLUGIN_REMAPPING) {
+ return bytes;
+ }
+ final ClassReader classReader = new ClassReader(bytes);
+ final ClassWriter classWriter = new ClassWriter(classReader, 0);
+ classReader.accept(ReflectionRemapper.visitor(classWriter), 0);
+ return classWriter.toByteArray();
+ }
+
+ 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..4477944f632a6b3936960ee80f9d898d3b7eed19 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_REMAPPING = Boolean.getBoolean("paper.disablePluginRemapping");
+ public static final String LEGACY_CB_VERSION = "v1_21_R2";
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 7d2d5c4ee244e7118a4c38628e2e69c79b11b98d..371d31266a532e59c49dbb106e354296b119fa5e 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
@@ -131,36 +131,26 @@ public class Commodore {
}
// 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
@@ -245,6 +235,7 @@ public class Commodore {
visitor = new LimitedClassRemapper(cw, new SimpleRemapper(Commodore.ENUM_RENAMES));
}
+ visitor = io.papermc.paper.pluginremap.reflect.ReflectionRemapper.visitor(visitor); // Paper
cr.accept(new ClassRemapper(new ClassVisitor(Opcodes.ASM9, visitor) {
final Set<RerouteMethodData> rerouteMethodData = new HashSet<>();
String className;
diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
index 3c9cdb8c67d2704caac6488a6216d8c9c8a009ef..ab4dd5a86ccd8e9878abf95417bb05ceb91dd19c 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
@@ -75,6 +75,7 @@ import org.bukkit.potion.PotionType;
@SuppressWarnings("deprecation")
public final class CraftMagicNumbers implements UnsafeValues {
public static final CraftMagicNumbers INSTANCE = new CraftMagicNumbers();
+ public static final boolean DISABLE_OLD_API_SUPPORT = Boolean.getBoolean("paper.disableOldApiSupport"); // Paper
private final Commodore commodore = new Commodore();
@@ -347,7 +348,7 @@ 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 (!DISABLE_OLD_API_SUPPORT && toCheck.isOlderThan(ApiVersion.FLATTENING)) { // Paper
CraftLegacy.init();
}
@@ -362,6 +363,12 @@ public final class CraftMagicNumbers implements UnsafeValues {
@Override
public byte[] processClass(PluginDescriptionFile pdf, String path, byte[] clazz) {
+ // Paper start
+ if (DISABLE_OLD_API_SUPPORT) {
+ // Make sure we still go through our reflection rewriting if needed
+ return io.papermc.paper.pluginremap.reflect.ReflectionRemapper.processClass(clazz);
+ }
+ // Paper end
try {
clazz = this.commodore.convert(clazz, pdf.getName(), ApiVersion.getOrCreateVersion(pdf.getAPIVersion()), ((CraftServer) Bukkit.getServer()).activeCompatibilities);
} catch (Exception ex) {
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