13
0
geforkt von Mirrors/Paper
Paper/patches/api/0008-Use-ASM-for-event-executors.patch

382 Zeilen
17 KiB
Diff

2021-06-11 14:02:28 +02:00
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Techcable <Techcable@outlook.com>
Date: Thu, 3 Mar 2016 13:20:33 -0700
Subject: [PATCH] Use ASM for event executors.
Uses method handles for private or static methods.
diff --git a/build.gradle.kts b/build.gradle.kts
Updated Upstream (Bukkit/CraftBukkit) (#11501) 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: bb4e97c6 Add support for Java 23 bc6874dd Bump asm to 9.7.1 50e8a00b PR-1064: Add specific getTopInventory methods for InventoryView derivatives 758b0a0f SPIGOT-7911: Fix Location#isWorldLoaded() for re-loaded worlds 133a64a7 Improve Registry#getOrThrow messages be0f5957 PR-1058: Add tests for Minecraft registry <-> Bukkit fields d1b31df2 PR-1062: Clarify BeaconView documentation 3fab4384 PR-1060: Cache Material to BlockType and ItemType conversion 967a7301 SPIGOT-7906: Increase YAML nesting limit to 100 6ecf033d SPIGOT-7899: Smithing recipes don't require inputs CraftBukkit Changes: 0a7bd6c81 PR-1493: Improve reroute performance and add some tests 54941524c Add support for Java 23 f4d957fff SPIGOT-7915: Fix World#getKeepSpawnInMemory() using Spawn Radius rather than Spawn Chunk Radius ded183674 Fix HIDE_ENCHANTS flag in items without enchantments 308785a0a Bump asm to 9.7.1 and re-add ClassReader to ClassWriter 72ce823cd PR-1487: Add specific getTopInventory methods for InventoryView derivatives 11a5e840c SPIGOT-7907, PR-1484: Improve merchant recipe item matching behavior to more closely align with older versions 45b66f7e4 SPIGOT-7909: Always set HIDE_ENCHANTS flag to item if flag is set 963459791 Increase outdated build delay fc5b2d75f SPIGOT-7910: Fix launching breeze wind charge from API and improve dispenser launch API c7d6428f2 SPIGOT-7856, PR-1483: End platform not dropping items after replacing blocks 2a5572b52 SPIGOT-7780, PR-1482: Cannot edit chunks during unload event 527041ab5 SPIGOT-7902, PR-1477: Fix CraftMetaPotion#hasCustomEffects() does not check if customEffects (List) is empty 5529a1769 Implement base methods for tags 30fbdbaaf Improve Registry#getOrThrow messages 6b71a7322 PR-1475: Add tests for Minecraft registry <-> Bukkit fields 5f24c255c SPIGOT-7908: Mark junit-platform-suite-engine as test scope e4c92ef65 PR-1473: Change tests to use suites, to run tests in different environments and feature flags d25e1e722 PR-1481: Fix BeaconView#set[X]Effect(null) d69a05362 PR-1480: Fix PerMaterialTest#isEdible test running for legacy materials bb3284a89 PR-1479: Use custom #isBlock method in legacy init instead of the one in Material, since it relies on legacy being init 98c57cbbe SPIGOT-7904: Fix NPE for PlayerItemBreakEvent f35bae9ec Fix missing hasJukeboxPlayable 8a6f8b6d8 SPIGOT-7881: CTRL+Pick Block saves position data into item 7913b3be7 SPIGOT-7899: Smithing recipes don't require inputs
2024-10-21 00:06:54 +02:00
index 562f8ae2d9cd2a1238bde1e5cfbf546c4f56bd6e..65783c7a3711fa147a4e090a9715f7e218a312ac 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -47,6 +47,9 @@ dependencies {
apiAndDocs("net.kyori:adventure-text-serializer-legacy")
apiAndDocs("net.kyori:adventure-text-serializer-plain")
apiAndDocs("net.kyori:adventure-text-logger-slf4j")
+
Updated Upstream (Bukkit/CraftBukkit) (#11501) 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: bb4e97c6 Add support for Java 23 bc6874dd Bump asm to 9.7.1 50e8a00b PR-1064: Add specific getTopInventory methods for InventoryView derivatives 758b0a0f SPIGOT-7911: Fix Location#isWorldLoaded() for re-loaded worlds 133a64a7 Improve Registry#getOrThrow messages be0f5957 PR-1058: Add tests for Minecraft registry <-> Bukkit fields d1b31df2 PR-1062: Clarify BeaconView documentation 3fab4384 PR-1060: Cache Material to BlockType and ItemType conversion 967a7301 SPIGOT-7906: Increase YAML nesting limit to 100 6ecf033d SPIGOT-7899: Smithing recipes don't require inputs CraftBukkit Changes: 0a7bd6c81 PR-1493: Improve reroute performance and add some tests 54941524c Add support for Java 23 f4d957fff SPIGOT-7915: Fix World#getKeepSpawnInMemory() using Spawn Radius rather than Spawn Chunk Radius ded183674 Fix HIDE_ENCHANTS flag in items without enchantments 308785a0a Bump asm to 9.7.1 and re-add ClassReader to ClassWriter 72ce823cd PR-1487: Add specific getTopInventory methods for InventoryView derivatives 11a5e840c SPIGOT-7907, PR-1484: Improve merchant recipe item matching behavior to more closely align with older versions 45b66f7e4 SPIGOT-7909: Always set HIDE_ENCHANTS flag to item if flag is set 963459791 Increase outdated build delay fc5b2d75f SPIGOT-7910: Fix launching breeze wind charge from API and improve dispenser launch API c7d6428f2 SPIGOT-7856, PR-1483: End platform not dropping items after replacing blocks 2a5572b52 SPIGOT-7780, PR-1482: Cannot edit chunks during unload event 527041ab5 SPIGOT-7902, PR-1477: Fix CraftMetaPotion#hasCustomEffects() does not check if customEffects (List) is empty 5529a1769 Implement base methods for tags 30fbdbaaf Improve Registry#getOrThrow messages 6b71a7322 PR-1475: Add tests for Minecraft registry <-> Bukkit fields 5f24c255c SPIGOT-7908: Mark junit-platform-suite-engine as test scope e4c92ef65 PR-1473: Change tests to use suites, to run tests in different environments and feature flags d25e1e722 PR-1481: Fix BeaconView#set[X]Effect(null) d69a05362 PR-1480: Fix PerMaterialTest#isEdible test running for legacy materials bb3284a89 PR-1479: Use custom #isBlock method in legacy init instead of the one in Material, since it relies on legacy being init 98c57cbbe SPIGOT-7904: Fix NPE for PlayerItemBreakEvent f35bae9ec Fix missing hasJukeboxPlayable 8a6f8b6d8 SPIGOT-7881: CTRL+Pick Block saves position data into item 7913b3be7 SPIGOT-7899: Smithing recipes don't require inputs
2024-10-21 00:06:54 +02:00
+ implementation("org.ow2.asm:asm:9.7.1")
+ implementation("org.ow2.asm:asm-commons:9.7.1")
// Paper end
compileOnly("org.apache.maven:maven-resolver-provider:3.9.6")
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diff --git a/src/main/java/com/destroystokyo/paper/event/executor/MethodHandleEventExecutor.java b/src/main/java/com/destroystokyo/paper/event/executor/MethodHandleEventExecutor.java
new file mode 100644
index 0000000000000000000000000000000000000000..5a702481d28d90cb503faad0d9b9c3231bbff940
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--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/executor/MethodHandleEventExecutor.java
@@ -0,0 +1,46 @@
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+package com.destroystokyo.paper.event.executor;
+
+import com.destroystokyo.paper.util.SneakyThrow;
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+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.reflect.Method;
+import org.bukkit.event.Event;
+import org.bukkit.event.EventException;
+import org.bukkit.event.Listener;
+import org.bukkit.plugin.EventExecutor;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
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+
+@ApiStatus.Internal
+@NullMarked
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+public class MethodHandleEventExecutor implements EventExecutor {
+
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+ private final Class<? extends Event> eventClass;
+ private final MethodHandle handle;
+
+ public MethodHandleEventExecutor(final Class<? extends Event> eventClass, final MethodHandle handle) {
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+ this.eventClass = eventClass;
+ this.handle = handle;
+ }
+
+ public MethodHandleEventExecutor(final Class<? extends Event> eventClass, final Method m) {
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+ this.eventClass = eventClass;
+ try {
+ m.setAccessible(true);
+ this.handle = MethodHandles.lookup().unreflect(m);
+ } catch (final IllegalAccessException e) {
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+ throw new AssertionError("Unable to set accessible", e);
+ }
+ }
+
+ @Override
+ public void execute(final Listener listener, final Event event) throws EventException {
+ if (!this.eventClass.isInstance(event)) return;
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+ try {
+ this.handle.invoke(listener, event);
+ } catch (final Throwable t) {
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+ SneakyThrow.sneaky(t);
+ }
+ }
+}
diff --git a/src/main/java/com/destroystokyo/paper/event/executor/StaticMethodHandleEventExecutor.java b/src/main/java/com/destroystokyo/paper/event/executor/StaticMethodHandleEventExecutor.java
new file mode 100644
index 0000000000000000000000000000000000000000..bbdb5b472df116b71c459bdc6cc4b74267ea0f5e
2021-06-11 14:02:28 +02:00
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/executor/StaticMethodHandleEventExecutor.java
@@ -0,0 +1,44 @@
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+package com.destroystokyo.paper.event.executor;
+
+import com.destroystokyo.paper.util.SneakyThrow;
+import com.google.common.base.Preconditions;
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+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import org.bukkit.event.Event;
+import org.bukkit.event.EventException;
+import org.bukkit.event.Listener;
+import org.bukkit.plugin.EventExecutor;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
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+
+@ApiStatus.Internal
+@NullMarked
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+public class StaticMethodHandleEventExecutor implements EventExecutor {
+
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+ private final Class<? extends Event> eventClass;
+ private final MethodHandle handle;
+
+ public StaticMethodHandleEventExecutor(final Class<? extends Event> eventClass, final Method m) {
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+ Preconditions.checkArgument(Modifier.isStatic(m.getModifiers()), "Not a static method: %s", m);
+ Preconditions.checkArgument(eventClass != null, "eventClass is null");
+ this.eventClass = eventClass;
+ try {
+ m.setAccessible(true);
+ this.handle = MethodHandles.lookup().unreflect(m);
+ } catch (final IllegalAccessException e) {
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+ throw new AssertionError("Unable to set accessible", e);
+ }
+ }
+
+ @Override
+ public void execute(final Listener listener, final Event event) throws EventException {
+ if (!this.eventClass.isInstance(event)) return;
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+ try {
+ this.handle.invoke(event);
+ } catch (final Throwable throwable) {
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+ SneakyThrow.sneaky(throwable);
+ }
+ }
+}
diff --git a/src/main/java/com/destroystokyo/paper/event/executor/asm/ASMEventExecutorGenerator.java b/src/main/java/com/destroystokyo/paper/event/executor/asm/ASMEventExecutorGenerator.java
new file mode 100644
index 0000000000000000000000000000000000000000..abfcb6e8383ff311940d82afe4ff990649a082dc
2021-06-11 14:02:28 +02:00
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/executor/asm/ASMEventExecutorGenerator.java
@@ -0,0 +1,59 @@
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+package com.destroystokyo.paper.event.executor.asm;
+
+import java.lang.reflect.Method;
+import java.util.concurrent.atomic.AtomicInteger;
+import org.bukkit.plugin.EventExecutor;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
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+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.Type;
+import org.objectweb.asm.commons.GeneratorAdapter;
+
+import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
+import static org.objectweb.asm.Opcodes.INVOKEINTERFACE;
+import static org.objectweb.asm.Opcodes.INVOKESPECIAL;
+import static org.objectweb.asm.Opcodes.INVOKEVIRTUAL;
+import static org.objectweb.asm.Opcodes.V1_8;
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+
+@ApiStatus.Internal
+@NullMarked
+public final class ASMEventExecutorGenerator {
+
+ private static final String EXECUTE_DESCRIPTOR = "(Lorg/bukkit/event/Listener;Lorg/bukkit/event/Event;)V";
+
+ public static byte[] generateEventExecutor(final Method m, final String name) {
+ final ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
+ writer.visit(V1_8, ACC_PUBLIC, name.replace('.', '/'), null, Type.getInternalName(Object.class), new String[]{Type.getInternalName(EventExecutor.class)});
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+ // Generate constructor
+ GeneratorAdapter methodGenerator = new GeneratorAdapter(writer.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null), ACC_PUBLIC, "<init>", "()V");
+ methodGenerator.loadThis();
+ methodGenerator.visitMethodInsn(INVOKESPECIAL, Type.getInternalName(Object.class), "<init>", "()V", false); // Invoke the super class (Object) constructor
+ methodGenerator.returnValue();
+ methodGenerator.endMethod();
+ // Generate the execute method
+ methodGenerator = new GeneratorAdapter(writer.visitMethod(ACC_PUBLIC, "execute", EXECUTE_DESCRIPTOR, null, null), ACC_PUBLIC, "execute", EXECUTE_DESCRIPTOR);
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+ methodGenerator.loadArg(0);
+ methodGenerator.checkCast(Type.getType(m.getDeclaringClass()));
+ methodGenerator.loadArg(1);
+ methodGenerator.checkCast(Type.getType(m.getParameterTypes()[0]));
+ methodGenerator.visitMethodInsn(m.getDeclaringClass().isInterface() ? INVOKEINTERFACE : INVOKEVIRTUAL, Type.getInternalName(m.getDeclaringClass()), m.getName(), Type.getMethodDescriptor(m), m.getDeclaringClass().isInterface());
+ // The only purpose of this switch statement is to generate the correct pop instruction, should the event handler method return something other than void.
+ // Non-void event handlers will be unsupported in a future release.
+ switch (Type.getType(m.getReturnType()).getSize()) {
+ // case 0 is omitted because the only type that has size 0 is void - no pop instruction needed.
+ case 1 -> methodGenerator.pop(); // handles reference types and most primitives
+ case 2 -> methodGenerator.pop2(); // handles long and double
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+ }
+ methodGenerator.returnValue();
+ methodGenerator.endMethod();
+ writer.visitEnd();
+ return writer.toByteArray();
+ }
+
+ public static AtomicInteger NEXT_ID = new AtomicInteger(1);
+
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+ public static String generateName() {
+ final int id = NEXT_ID.getAndIncrement();
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+ return "com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor" + id;
+ }
+}
diff --git a/src/main/java/com/destroystokyo/paper/event/executor/asm/ClassDefiner.java b/src/main/java/com/destroystokyo/paper/event/executor/asm/ClassDefiner.java
new file mode 100644
index 0000000000000000000000000000000000000000..581561fbd32c81ab1774ba8f0b7f3cec9392d99a
2021-06-11 14:02:28 +02:00
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/executor/asm/ClassDefiner.java
@@ -0,0 +1,35 @@
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+package com.destroystokyo.paper.event.executor.asm;
+
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
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+
+@ApiStatus.Internal
+@NullMarked
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+public interface ClassDefiner {
+
+ /**
+ * Returns if the defined classes can bypass access checks
+ *
+ * @return if classes bypass access checks
+ */
+ default boolean isBypassAccessChecks() {
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+ return false;
+ }
+
+ /**
+ * Define a class
+ *
+ * @param parentLoader the parent classloader
+ * @param name the name of the class
+ * @param data the class data to load
+ * @return the defined class
+ * @throws ClassFormatError if the class data is invalid
+ * @throws NullPointerException if any of the arguments are null
+ */
+ Class<?> defineClass(ClassLoader parentLoader, String name, byte[] data);
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+
+ static ClassDefiner getInstance() {
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+ return SafeClassDefiner.INSTANCE;
+ }
+
+}
diff --git a/src/main/java/com/destroystokyo/paper/event/executor/asm/SafeClassDefiner.java b/src/main/java/com/destroystokyo/paper/event/executor/asm/SafeClassDefiner.java
new file mode 100644
index 0000000000000000000000000000000000000000..48bcc72293c2a31b6e2dd2dcd6a79d618c72a137
2021-06-11 14:02:28 +02:00
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/executor/asm/SafeClassDefiner.java
@@ -0,0 +1,66 @@
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+package com.destroystokyo.paper.event.executor.asm;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.MapMaker;
+import java.util.concurrent.ConcurrentMap;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
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+
+@ApiStatus.Internal
+@NullMarked
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+public class SafeClassDefiner implements ClassDefiner {
+
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+ /* default */ static final SafeClassDefiner INSTANCE = new SafeClassDefiner();
+
+ private SafeClassDefiner() {
+ }
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+
+ private final ConcurrentMap<ClassLoader, GeneratedClassLoader> loaders = new MapMaker().weakKeys().makeMap();
+
+ @Override
+ public Class<?> defineClass(final ClassLoader parentLoader, final String name, final byte[] data) {
+ final GeneratedClassLoader loader = this.loaders.computeIfAbsent(parentLoader, GeneratedClassLoader::new);
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+ synchronized (loader.getClassLoadingLock(name)) {
+ Preconditions.checkState(!loader.hasClass(name), "%s already defined", name);
+ final Class<?> c = loader.define(name, data);
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+ assert c.getName().equals(name);
+ return c;
+ }
+ }
+
+ private static class GeneratedClassLoader extends ClassLoader {
+
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+ static {
+ ClassLoader.registerAsParallelCapable();
+ }
+
+ protected GeneratedClassLoader(final ClassLoader parent) {
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+ super(parent);
+ }
+
+ private Class<?> define(final String name, final byte[] data) {
+ synchronized (this.getClassLoadingLock(name)) {
+ assert !this.hasClass(name);
+ final Class<?> c = this.defineClass(name, data, 0, data.length);
+ this.resolveClass(c);
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+ return c;
+ }
+ }
+
+ @Override
+ public Object getClassLoadingLock(final String name) {
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+ return super.getClassLoadingLock(name);
+ }
+
+ public boolean hasClass(final String name) {
+ synchronized (this.getClassLoadingLock(name)) {
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+ try {
+ Class.forName(name);
+ return true;
+ } catch (final ClassNotFoundException e) {
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+ return false;
+ }
+ }
+ }
+ }
+}
diff --git a/src/main/java/org/bukkit/plugin/EventExecutor.java b/src/main/java/org/bukkit/plugin/EventExecutor.java
index a850f0780de05463fc0d3f9e15ff7f19d88b2aed..9026e108ccd3a88aee1267ee275137befa646455 100644
--- a/src/main/java/org/bukkit/plugin/EventExecutor.java
+++ b/src/main/java/org/bukkit/plugin/EventExecutor.java
@@ -5,9 +5,75 @@ import org.bukkit.event.EventException;
import org.bukkit.event.Listener;
import org.jetbrains.annotations.NotNull;
+// Paper start
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.function.Function;
+
+import com.destroystokyo.paper.event.executor.MethodHandleEventExecutor;
+import com.destroystokyo.paper.event.executor.StaticMethodHandleEventExecutor;
+import com.destroystokyo.paper.event.executor.asm.ASMEventExecutorGenerator;
+import com.destroystokyo.paper.event.executor.asm.ClassDefiner;
+import com.google.common.base.Preconditions;
+// Paper end
+
/**
* Interface which defines the class for event call backs to plugins
*/
public interface EventExecutor {
public void execute(@NotNull Listener listener, @NotNull Event event) throws EventException;
+
+ // Paper start
+ ConcurrentMap<Method, Class<? extends EventExecutor>> eventExecutorMap = new ConcurrentHashMap<Method, Class<? extends EventExecutor>>() {
+ @NotNull
+ @Override
+ public Class<? extends EventExecutor> computeIfAbsent(@NotNull Method key, @NotNull Function<? super Method, ? extends Class<? extends EventExecutor>> mappingFunction) {
+ Class<? extends EventExecutor> executorClass = get(key);
+ if (executorClass != null)
+ return executorClass;
+
+ //noinspection SynchronizationOnLocalVariableOrMethodParameter
+ synchronized (key) {
+ executorClass = get(key);
+ if (executorClass != null)
+ return executorClass;
+
+ return super.computeIfAbsent(key, mappingFunction);
+ }
+ }
+ };
+
+ @NotNull
+ public static EventExecutor create(@NotNull Method m, @NotNull Class<? extends Event> eventClass) {
+ Preconditions.checkNotNull(m, "Null method");
+ Preconditions.checkArgument(m.getParameterCount() != 0, "Incorrect number of arguments %s", m.getParameterCount());
+ Preconditions.checkArgument(m.getParameterTypes()[0] == eventClass, "First parameter %s doesn't match event class %s", m.getParameterTypes()[0], eventClass);
+ ClassDefiner definer = ClassDefiner.getInstance();
+ if (Modifier.isStatic(m.getModifiers())) {
+ return new StaticMethodHandleEventExecutor(eventClass, m);
+ } else if (definer.isBypassAccessChecks() || Modifier.isPublic(m.getDeclaringClass().getModifiers()) && Modifier.isPublic(m.getModifiers())) {
+ // get the existing generated EventExecutor class for the Method or generate one
+ Class<? extends EventExecutor> executorClass = eventExecutorMap.computeIfAbsent(m, (__) -> {
+ String name = ASMEventExecutorGenerator.generateName();
+ byte[] classData = ASMEventExecutorGenerator.generateEventExecutor(m, name);
+ return definer.defineClass(m.getDeclaringClass().getClassLoader(), name, classData).asSubclass(EventExecutor.class);
+ });
+
+ try {
+ EventExecutor asmExecutor = executorClass.newInstance();
+ // Define a wrapper to conform to bukkit stupidity (passing in events that don't match and wrapper exception)
+ return (listener, event) -> {
+ if (!eventClass.isInstance(event)) return;
+ asmExecutor.execute(listener, event);
+ };
+ } catch (InstantiationException | IllegalAccessException e) {
+ throw new AssertionError("Unable to initialize generated event executor", e);
+ }
+ } else {
+ return new MethodHandleEventExecutor(eventClass, m);
+ }
+ }
+ // Paper end
}