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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 33c3cc405c67d536c8a3038b83fd470fda10680e..ab1aaf53f9a897982c93b754b8dbe8b6f4812f21 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -34,7 +34,6 @@ dependencies {
implementation("org.ow2.asm:asm-commons:9.7")
implementation("org.spongepowered:configurate-yaml:4.2.0-SNAPSHOT") // Paper - config files
implementation("commons-lang:commons-lang:2.6")
- implementation("net.fabricmc:mapping-io:0.5.0") // Paper - needed to read mappings for stacktrace deobfuscation
runtimeOnly("com.lmax:disruptor:3.4.4") // Paper
runtimeOnly("org.apache.maven:maven-resolver-provider:3.9.6")
@@ -48,6 +47,12 @@ dependencies {
testImplementation("org.junit-pioneer:junit-pioneer:2.2.0") // Paper - CartesianTest
implementation("net.neoforged:AutoRenamingTool:2.0.3") // Paper - remap plugins
implementation("net.neoforged:srgutils:1.0.9") // Paper - remap plugins - bump transitive of ART
+ // 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/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/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..450d20a7a43868c06c43a9da07345e47786c75d4 100644
--- a/src/main/java/io/papermc/paper/util/MappingEnvironment.java
+++ b/src/main/java/io/papermc/paper/util/MappingEnvironment.java
@@ -10,6 +10,7 @@ import org.checkerframework.framework.qual.DefaultQualifier;
@DefaultQualifier(NonNull.class)
public final class MappingEnvironment {
+ public static final String LEGACY_CB_VERSION = "v1_20_R3";
private static final @Nullable String MAPPINGS_HASH = readMappingsHash();
private static final boolean REOBF = checkReobf();
diff --git a/src/main/java/io/papermc/paper/util/ObfHelper.java b/src/main/java/io/papermc/paper/util/ObfHelper.java
index 3f03d5efcd95e3adb76dc4292b3d2c420fdc58af..9eecb96cb7ec6d6a157ed2c5637e05138c3f55b9 100644
--- a/src/main/java/io/papermc/paper/util/ObfHelper.java
+++ b/src/main/java/io/papermc/paper/util/ObfHelper.java
@@ -2,19 +2,13 @@ package io.papermc.paper.util;
import java.io.IOException;
import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
-import java.util.function.Function;
import java.util.stream.Collectors;
-import net.fabricmc.mappingio.MappingReader;
-import net.fabricmc.mappingio.format.MappingFormat;
-import net.fabricmc.mappingio.tree.MappingTree;
-import net.fabricmc.mappingio.tree.MemoryMappingTree;
+import net.neoforged.srgutils.IMappingFile;
import org.checkerframework.checker.nullness.qual.NonNull;
import org.checkerframework.checker.nullness.qual.Nullable;
import org.checkerframework.framework.qual.DefaultQualifier;
@@ -23,9 +17,6 @@ import org.checkerframework.framework.qual.DefaultQualifier;
public enum ObfHelper {
INSTANCE;
- public static final String MOJANG_PLUS_YARN_NAMESPACE = "mojang+yarn";
- public static final String SPIGOT_NAMESPACE = "spigot";
-
private final @Nullable Map<String, ClassMapping> mappingsByObfName;
private final @Nullable Map<String, ClassMapping> mappingsByMojangName;
@@ -93,55 +84,73 @@ public enum ObfHelper {
return null;
}
try (final InputStream mappingsInputStream = MappingEnvironment.mappingsStream()) {
- final MemoryMappingTree tree = new MemoryMappingTree();
- MappingReader.read(new InputStreamReader(mappingsInputStream, StandardCharsets.UTF_8), MappingFormat.TINY_2_FILE, tree);
+ final IMappingFile mappings = IMappingFile.load(mappingsInputStream); // Mappings are mojang->spigot
final Set<ClassMapping> classes = new HashSet<>();
final StringPool pool = new StringPool();
- for (final MappingTree.ClassMapping cls : tree.getClasses()) {
+ for (final IMappingFile.IClass cls : mappings.getClasses()) {
final Map<String, String> methods = new HashMap<>();
+ final Map<String, String> fields = new HashMap<>();
+ final Map<String, String> strippedMethods = new HashMap<>();
- for (final MappingTree.MethodMapping methodMapping : cls.getMethods()) {
+ for (final IMappingFile.IMethod methodMapping : cls.getMethods()) {
methods.put(
pool.string(methodKey(
- Objects.requireNonNull(methodMapping.getName(SPIGOT_NAMESPACE)),
- Objects.requireNonNull(methodMapping.getDesc(SPIGOT_NAMESPACE))
+ Objects.requireNonNull(methodMapping.getMapped()),
+ Objects.requireNonNull(methodMapping.getMappedDescriptor())
)),
- pool.string(Objects.requireNonNull(methodMapping.getName(MOJANG_PLUS_YARN_NAMESPACE)))
+ pool.string(Objects.requireNonNull(methodMapping.getOriginal()))
+ );
+
+ strippedMethods.put(
+ pool.string(pool.string(strippedMethodKey(
+ methodMapping.getMapped(),
+ methodMapping.getDescriptor()
+ ))),
+ pool.string(methodMapping.getOriginal())
+ );
+ }
+ for (final IMappingFile.IField field : cls.getFields()) {
+ fields.put(
+ pool.string(field.getMapped()),
+ pool.string(field.getOriginal())
);
}
final ClassMapping map = new ClassMapping(
- Objects.requireNonNull(cls.getName(SPIGOT_NAMESPACE)).replace('/', '.'),
- Objects.requireNonNull(cls.getName(MOJANG_PLUS_YARN_NAMESPACE)).replace('/', '.'),
- Map.copyOf(methods)
+ Objects.requireNonNull(cls.getMapped()).replace('/', '.'),
+ Objects.requireNonNull(cls.getOriginal()).replace('/', '.'),
+ Map.copyOf(methods),
+ Map.copyOf(fields),
+ Map.copyOf(strippedMethods)
);
classes.add(map);
}
return Set.copyOf(classes);
} catch (final IOException ex) {
- System.err.println("Failed to load mappings for stacktrace deobfuscation.");
+ System.err.println("Failed to load mappings.");
ex.printStackTrace();
return null;
}
}
- public static String methodKey(final String obfName, final String obfDescriptor) {
- return obfName + obfDescriptor;
+ public static String strippedMethodKey(final String methodName, final String methodDescriptor) {
+ final String methodKey = methodKey(methodName, methodDescriptor);
+ final int returnDescriptorEnd = methodKey.indexOf(')');
+ return methodKey.substring(0, returnDescriptorEnd + 1);
}
- private static final class StringPool {
- private final Map<String, String> pool = new HashMap<>();
-
- public String string(final String string) {
- return this.pool.computeIfAbsent(string, Function.identity());
- }
+ public static String methodKey(final String methodName, final String methodDescriptor) {
+ return methodName + methodDescriptor;
}
public record ClassMapping(
String obfName,
String mojangName,
- Map<String, String> methodsByObf
+ Map<String, String> methodsByObf,
+ Map<String, String> fieldsByObf,
+ // obf name with mapped desc to mapped name. return value is excluded from desc as reflection doesn't use it
+ Map<String, String> strippedMethods
) {}
}
diff --git a/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java b/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
index eb910d4abf91488fa7cf1f5d47e0ee916c47f512..0b65fdf53124f3dd042b2363b1b8df8e1ca7de00 100644
--- a/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
+++ b/src/main/java/io/papermc/paper/util/StacktraceDeobfuscator.java
@@ -1,12 +1,11 @@
package io.papermc.paper.util;
import io.papermc.paper.configuration.GlobalConfiguration;
-import it.unimi.dsi.fastutil.ints.IntArrayList;
-import it.unimi.dsi.fastutil.ints.IntList;
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
-import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import org.checkerframework.checker.nullness.qual.NonNull;
@@ -22,14 +21,17 @@ import org.objectweb.asm.Opcodes;
public enum StacktraceDeobfuscator {
INSTANCE;
- private final Map<Class<?>, Map<String, IntList>> lineMapCache = Collections.synchronizedMap(new LinkedHashMap<>(128, 0.75f, true) {
+ private final Map<Class<?>, Int2ObjectMap<String>> lineMapCache = Collections.synchronizedMap(new LinkedHashMap<>(128, 0.75f, true) {
@Override
- protected boolean removeEldestEntry(final Map.Entry<Class<?>, Map<String, IntList>> eldest) {
+ protected boolean removeEldestEntry(final Map.Entry<Class<?>, Int2ObjectMap<String>> eldest) {
return this.size() > 127;
}
});
public void deobfuscateThrowable(final Throwable throwable) {
+ if (!MappingEnvironment.reobf()) {
+ return;
+ }
if (GlobalConfiguration.get() != null && !GlobalConfiguration.get().logging.deobfuscateStacktraces) { // handle null as true
return;
}
@@ -45,6 +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;
}
@@ -89,18 +94,7 @@ public enum StacktraceDeobfuscator {
}
private @Nullable String determineMethodForLine(final Class<?> clazz, final int lineNumber) {
- final Map<String, IntList> lineMap = this.lineMapCache.computeIfAbsent(clazz, StacktraceDeobfuscator::buildLineMap);
- for (final var entry : lineMap.entrySet()) {
- final String methodKey = entry.getKey();
- final IntList lines = entry.getValue();
- for (int i = 0, linesSize = lines.size(); i < linesSize; i++) {
- final int num = lines.getInt(i);
- if (num == lineNumber) {
- return methodKey;
- }
- }
- }
- return null;
+ return this.lineMapCache.computeIfAbsent(clazz, StacktraceDeobfuscator::buildLineMap).get(lineNumber);
}
private static String sourceFileName(final String fullClassName) {
@@ -112,34 +106,27 @@ public enum StacktraceDeobfuscator {
return rootClassName + ".java";
}
- private static Map<String, IntList> buildLineMap(final Class<?> key) {
- final Map<String, IntList> lineMap = new HashMap<>();
+ private static Int2ObjectMap<String> buildLineMap(final Class<?> key) {
+ final StringPool pool = new StringPool();
+ final Int2ObjectMap<String> lineMap = new Int2ObjectOpenHashMap<>();
final class LineCollectingMethodVisitor extends MethodVisitor {
- private final IntList lines = new IntArrayList();
private final String name;
private final String descriptor;
- LineCollectingMethodVisitor(String name, String descriptor) {
+ LineCollectingMethodVisitor(final String name, final String descriptor) {
super(Opcodes.ASM9);
this.name = name;
this.descriptor = descriptor;
}
@Override
- public void visitLineNumber(int line, Label start) {
- super.visitLineNumber(line, start);
- this.lines.add(line);
- }
-
- @Override
- public void visitEnd() {
- super.visitEnd();
- lineMap.put(ObfHelper.methodKey(this.name, this.descriptor), this.lines);
+ public void visitLineNumber(final int line, final Label start) {
+ lineMap.put(line, pool.string(ObfHelper.methodKey(this.name, this.descriptor)));
}
}
final ClassVisitor classVisitor = new ClassVisitor(Opcodes.ASM9) {
@Override
- public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
+ public MethodVisitor visitMethod(final int access, final String name, final String descriptor, final String signature, final String[] exceptions) {
return new LineCollectingMethodVisitor(name, descriptor);
}
};
diff --git a/src/main/java/io/papermc/paper/util/StringPool.java b/src/main/java/io/papermc/paper/util/StringPool.java
new file mode 100644
index 0000000000000000000000000000000000000000..c0a486cb46ff30353c3ff09567891cd36238eeb4
--- /dev/null
+++ b/src/main/java/io/papermc/paper/util/StringPool.java
@@ -0,0 +1,34 @@
+package io.papermc.paper.util;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.framework.qual.DefaultQualifier;
+
+/**
+ * De-duplicates {@link String} instances without using {@link String#intern()}.
+ *
+ * <p>Interning may not be desired as we may want to use the heap for our pool,
+ * so it can be garbage collected as normal, etc.</p>
+ *
+ * <p>Additionally, interning can be slow due to the potentially large size of the
+ * pool (as it is shared for the entire JVM), and because most JVMs implement
+ * it using JNI.</p>
+ */
+@DefaultQualifier(NonNull.class)
+public final class StringPool {
+ private final Map<String, String> pool;
+
+ public StringPool() {
+ this(new HashMap<>());
+ }
+
+ public StringPool(final Map<String, String> map) {
+ this.pool = map;
+ }
+
+ public String string(final String string) {
+ return this.pool.computeIfAbsent(string, Function.identity());
+ }
+}
diff --git a/src/main/java/net/minecraft/world/level/redstone/CollectingNeighborUpdater.java b/src/main/java/net/minecraft/world/level/redstone/CollectingNeighborUpdater.java
index 457a963ee6ebd3cf5c3831f6660e3850335af49f..61744d8fde3ba98585cf261fc09f0acc042b67b8 100644
--- a/src/main/java/net/minecraft/world/level/redstone/CollectingNeighborUpdater.java
+++ b/src/main/java/net/minecraft/world/level/redstone/CollectingNeighborUpdater.java
@@ -128,7 +128,7 @@ public class CollectingNeighborUpdater implements NeighborUpdater {
}
}
- interface NeighborUpdates {
+ public interface NeighborUpdates { // Paper - TODO make package-private again (it is just made public for testing LambdaMetafactory remapping)
boolean runNext(Level world);
}
diff --git a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
index 072153a601eb257bd36bba24f356d4eb085e3636..432ad62a82573901673d654b06e87b62369bea7a 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
@@ -65,36 +65,20 @@ 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);
- }
-
- return getAndRemove;
- }
+ 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 + "/";
@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
@@ -167,7 +151,7 @@ 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;
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