mirror of
https://github.com/PaperMC/Paper.git
synced 2024-09-12 15:08:27 +02:00
Upstream has released updates that appears 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: 93e39ce1 Clarify documentation regarding getMaterial with legacyName = true c3aeaea0 Improve dependency tracker 14c9d275 Add support for transitive depends in load access warning c8afe560 SPIGOT-5526: Add EntityEnterBlockEvent 6bb6f07d SPIGOT-5548: Show error that hints towards plugins misusing reflection ed75537d SPIGOT-5546: Fix bad depend access using wrong provider in message 4e4c0ee9 Fix buggy classloader warning triggering for all classes 89586a4c Print warning when loading classes from depends that have not been specified d4fe9680 Fix bug where disablePlugin could remove ConfigurationSerializable classes from other plugins 85e683b7 Add additional checkstyle checks 612fd8e1 Correct max page count in BookMeta docs fa8a9781 Correct max title length in BookMeta docs CraftBukkit Changes:ab13a117
SPIGOT-5550: Cancelled ProjectileLaunchEvent still plays sound for eggs44016b1d
SPIGOT-5538: Using javaw to run GUI prints input errore653ae76
SPIGOT-5526: Call EntityEnterBlockEvent for bees trying to enter hives6515ea49
SPIGOT-5537: Bee nests generated by growing trees near flower have no beesd82b3149
Remove unused CraftWorld.getId method10763a88
Change some block == AIR checks to isAir to catch CAVE_AIR Spigot Changes: f2c1cd15 Rebuild patches bcd458ad Reformat patches
444 lines
18 KiB
Diff
444 lines
18 KiB
Diff
From 756aea639de4f25d902ce0c2fc794d3d4d1265d3 Mon Sep 17 00:00:00 2001
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From: Techcable <Techcable@outlook.com>
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Date: Thu, 3 Mar 2016 13:20:33 -0700
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Subject: [PATCH] Use ASM for event executors.
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Uses method handles for private or static methods.
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diff --git a/pom.xml b/pom.xml
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index a540adef..5c25ff12 100644
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--- a/pom.xml
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+++ b/pom.xml
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@@ -128,6 +128,17 @@
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<version>7.3.1</version>
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<scope>test</scope>
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</dependency>
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+ <!-- ASM -->
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+ <dependency>
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+ <groupId>org.ow2.asm</groupId>
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+ <artifactId>asm</artifactId>
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+ <version>7.3.1</version>
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+ </dependency>
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+ <dependency>
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+ <groupId>org.ow2.asm</groupId>
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+ <artifactId>asm-commons</artifactId>
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+ <version>7.3.1</version>
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+ </dependency>
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</dependencies>
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<build>
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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
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new file mode 100644
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index 00000000..5b28e9b1
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/event/executor/MethodHandleEventExecutor.java
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@@ -0,0 +1,42 @@
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+package com.destroystokyo.paper.event.executor;
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+
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+import java.lang.invoke.MethodHandle;
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+import java.lang.invoke.MethodHandles;
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+import java.lang.reflect.Method;
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+
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+import com.destroystokyo.paper.util.SneakyThrow;
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+import org.bukkit.event.Event;
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+import org.bukkit.event.EventException;
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+import org.bukkit.event.Listener;
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+import org.bukkit.plugin.EventExecutor;
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+import org.jetbrains.annotations.NotNull;
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+
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+public class MethodHandleEventExecutor implements EventExecutor {
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+ private final Class<? extends Event> eventClass;
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+ private final MethodHandle handle;
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+
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+ public MethodHandleEventExecutor(@NotNull Class<? extends Event> eventClass, @NotNull MethodHandle handle) {
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+ this.eventClass = eventClass;
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+ this.handle = handle;
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+ }
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+
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+ public MethodHandleEventExecutor(@NotNull Class<? extends Event> eventClass, @NotNull Method m) {
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+ this.eventClass = eventClass;
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+ try {
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+ m.setAccessible(true);
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+ this.handle = MethodHandles.lookup().unreflect(m);
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+ } catch (IllegalAccessException e) {
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+ throw new AssertionError("Unable to set accessible", e);
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+ }
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+ }
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+
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+ @Override
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+ public void execute(@NotNull Listener listener, @NotNull Event event) throws EventException {
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+ if (!eventClass.isInstance(event)) return;
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+ try {
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+ handle.invoke(listener, event);
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+ } catch (Throwable t) {
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+ SneakyThrow.sneaky(t);
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+ }
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+ }
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+}
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diff --git a/src/main/java/com/destroystokyo/paper/event/executor/StaticMethodHandleEventExecutor.java b/src/main/java/com/destroystokyo/paper/event/executor/StaticMethodHandleEventExecutor.java
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new file mode 100644
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index 00000000..c8367242
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/event/executor/StaticMethodHandleEventExecutor.java
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@@ -0,0 +1,43 @@
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+package com.destroystokyo.paper.event.executor;
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+
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+import java.lang.invoke.MethodHandle;
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+import java.lang.invoke.MethodHandles;
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+import java.lang.reflect.Method;
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+import java.lang.reflect.Modifier;
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+
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+import com.destroystokyo.paper.util.SneakyThrow;
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+import com.google.common.base.Preconditions;
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+
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+import org.bukkit.Bukkit;
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+import org.bukkit.event.Event;
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+import org.bukkit.event.EventException;
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+import org.bukkit.event.Listener;
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+import org.bukkit.plugin.EventExecutor;
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+import org.jetbrains.annotations.NotNull;
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+
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+public class StaticMethodHandleEventExecutor implements EventExecutor {
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+ private final Class<? extends Event> eventClass;
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+ private final MethodHandle handle;
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+
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+ public StaticMethodHandleEventExecutor(@NotNull Class<? extends Event> eventClass, @NotNull Method m) {
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+ Preconditions.checkArgument(Modifier.isStatic(m.getModifiers()), "Not a static method: %s", m);
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+ Preconditions.checkArgument(eventClass != null, "eventClass is null");
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+ this.eventClass = eventClass;
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+ try {
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+ m.setAccessible(true);
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+ this.handle = MethodHandles.lookup().unreflect(m);
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+ } catch (IllegalAccessException e) {
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+ throw new AssertionError("Unable to set accessible", e);
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+ }
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+ }
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+
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+ @Override
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+ public void execute(@NotNull Listener listener, @NotNull Event event) throws EventException {
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+ if (!eventClass.isInstance(event)) return;
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+ try {
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+ handle.invoke(event);
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+ } catch (Throwable throwable) {
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+ SneakyThrow.sneaky(throwable);
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+ }
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+ }
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+}
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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
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new file mode 100644
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index 00000000..b6e7d8ee
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/event/executor/asm/ASMEventExecutorGenerator.java
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@@ -0,0 +1,47 @@
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+package com.destroystokyo.paper.event.executor.asm;
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+
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+import java.lang.reflect.Method;
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+import java.util.concurrent.atomic.AtomicInteger;
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+
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+import org.bukkit.plugin.EventExecutor;
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+import org.jetbrains.annotations.NotNull;
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+import org.objectweb.asm.ClassWriter;
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+import org.objectweb.asm.Type;
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+import org.objectweb.asm.commons.GeneratorAdapter;
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+
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+import static org.objectweb.asm.Opcodes.*;
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+
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+public class ASMEventExecutorGenerator {
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+ @NotNull
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+ public static byte[] generateEventExecutor(@NotNull Method m, @NotNull String name) {
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+ ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
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+ 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
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+ GeneratorAdapter methodGenerator = new GeneratorAdapter(writer.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null), ACC_PUBLIC, "<init>", "()V");
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+ methodGenerator.loadThis();
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+ methodGenerator.visitMethodInsn(INVOKESPECIAL, Type.getInternalName(Object.class), "<init>", "()V", false); // Invoke the super class (Object) constructor
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+ methodGenerator.returnValue();
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+ methodGenerator.endMethod();
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+ // Generate the execute method
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+ methodGenerator = new GeneratorAdapter(writer.visitMethod(ACC_PUBLIC, "execute", "(Lorg/bukkit/event/Listener;Lorg/bukkit/event/Event;)V", null, null), ACC_PUBLIC, "execute", "(Lorg/bukkit/event/Listener;Lorg/bukkit/event/Listener;)V");;
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+ methodGenerator.loadArg(0);
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+ methodGenerator.checkCast(Type.getType(m.getDeclaringClass()));
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+ methodGenerator.loadArg(1);
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+ methodGenerator.checkCast(Type.getType(m.getParameterTypes()[0]));
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+ methodGenerator.visitMethodInsn(m.getDeclaringClass().isInterface() ? INVOKEINTERFACE : INVOKEVIRTUAL, Type.getInternalName(m.getDeclaringClass()), m.getName(), Type.getMethodDescriptor(m), m.getDeclaringClass().isInterface());
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+ if (m.getReturnType() != void.class) {
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+ methodGenerator.pop();
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+ }
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+ methodGenerator.returnValue();
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+ methodGenerator.endMethod();
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+ writer.visitEnd();
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+ return writer.toByteArray();
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+ }
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+
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+ public static AtomicInteger NEXT_ID = new AtomicInteger(1);
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+ @NotNull
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+ public static String generateName() {
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+ int id = NEXT_ID.getAndIncrement();
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+ return "com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor" + id;
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+ }
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+}
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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
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new file mode 100644
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index 00000000..beed9e6e
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/event/executor/asm/ClassDefiner.java
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@@ -0,0 +1,35 @@
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+package com.destroystokyo.paper.event.executor.asm;
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+
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+import com.destroystokyo.paper.utils.UnsafeUtils;
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+import org.jetbrains.annotations.NotNull;
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+
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+public interface ClassDefiner {
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+
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+ /**
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+ * Returns if the defined classes can bypass access checks
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+ *
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+ * @return if classes bypass access checks
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+ */
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+ public default boolean isBypassAccessChecks() {
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+ return false;
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+ }
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+
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+ /**
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+ * Define a class
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+ *
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+ * @param parentLoader the parent classloader
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+ * @param name the name of the class
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+ * @param data the class data to load
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+ * @return the defined class
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+ * @throws ClassFormatError if the class data is invalid
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+ * @throws NullPointerException if any of the arguments are null
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+ */
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+ @NotNull
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+ public Class<?> defineClass(@NotNull ClassLoader parentLoader, @NotNull String name, @NotNull byte[] data);
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+
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+ @NotNull
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+ public static ClassDefiner getInstance() {
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+ return SafeClassDefiner.INSTANCE;
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+ }
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+
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+}
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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
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new file mode 100644
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index 00000000..ac99477e
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/event/executor/asm/SafeClassDefiner.java
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@@ -0,0 +1,66 @@
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+package com.destroystokyo.paper.event.executor.asm;
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+
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+import java.util.concurrent.ConcurrentHashMap;
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+import java.util.concurrent.ConcurrentMap;
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+
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+import com.google.common.base.Preconditions;
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+
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+import com.google.common.collect.MapMaker;
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+import org.jetbrains.annotations.NotNull;
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+import org.objectweb.asm.Type;
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+
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+public class SafeClassDefiner implements ClassDefiner {
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+ /* default */ static final SafeClassDefiner INSTANCE = new SafeClassDefiner();
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+
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+ private SafeClassDefiner() {}
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+
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+ private final ConcurrentMap<ClassLoader, GeneratedClassLoader> loaders = new MapMaker().weakKeys().makeMap();
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+
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+ @NotNull
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+ @Override
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+ public Class<?> defineClass(@NotNull ClassLoader parentLoader, @NotNull String name, @NotNull byte[] data) {
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+ GeneratedClassLoader loader = loaders.computeIfAbsent(parentLoader, GeneratedClassLoader::new);
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+ synchronized (loader.getClassLoadingLock(name)) {
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+ Preconditions.checkState(!loader.hasClass(name), "%s already defined", name);
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+ Class<?> c = loader.define(name, data);
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+ assert c.getName().equals(name);
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+ return c;
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+ }
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+ }
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+
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+ private static class GeneratedClassLoader extends ClassLoader {
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+ static {
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+ ClassLoader.registerAsParallelCapable();
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+ }
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+
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+ protected GeneratedClassLoader(@NotNull ClassLoader parent) {
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+ super(parent);
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+ }
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+
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+ private Class<?> define(@NotNull String name, byte[] data) {
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+ synchronized (getClassLoadingLock(name)) {
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+ assert !hasClass(name);
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+ Class<?> c = defineClass(name, data, 0, data.length);
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+ resolveClass(c);
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+ return c;
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+ }
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+ }
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+
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+ @Override
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+ @NotNull
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+ public Object getClassLoadingLock(@NotNull String name) {
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+ return super.getClassLoadingLock(name);
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+ }
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+
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+ public boolean hasClass(@NotNull String name) {
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+ synchronized (getClassLoadingLock(name)) {
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+ try {
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+ Class.forName(name);
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+ return true;
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+ } catch (ClassNotFoundException e) {
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+ return false;
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+ }
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+ }
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+ }
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+ }
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+}
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diff --git a/src/main/java/com/destroystokyo/paper/utils/UnsafeUtils.java b/src/main/java/com/destroystokyo/paper/utils/UnsafeUtils.java
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new file mode 100644
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index 00000000..72e48e8e
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/utils/UnsafeUtils.java
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@@ -0,0 +1,35 @@
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+package com.destroystokyo.paper.utils;
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+
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+import org.jetbrains.annotations.Nullable;
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+import sun.misc.Unsafe;
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+
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+import java.lang.reflect.Field;
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+
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+public class UnsafeUtils {
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+ private UnsafeUtils() {}
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+
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+ private static final Unsafe UNSAFE;
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+ static {
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+ Unsafe unsafe;
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+ try {
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+ Class c = Class.forName("sun.misc.Unsafe");
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+ Field f = c.getDeclaredField("theUnsafe");
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+ f.setAccessible(true);
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+ unsafe = (Unsafe) f.get(null);
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+ } catch (ClassNotFoundException | NoSuchFieldException | SecurityException e) {
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+ unsafe = null;
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+ } catch (IllegalAccessException e) {
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+ throw new AssertionError(e);
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+ }
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+ UNSAFE = unsafe;
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+ }
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+
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+ public static boolean isUnsafeSupported() {
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+ return UNSAFE != null;
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+ }
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+
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+ @Nullable
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+ public static Unsafe getUnsafe() {
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+ return UNSAFE;
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+ }
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+}
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diff --git a/src/main/java/org/bukkit/plugin/EventExecutor.java b/src/main/java/org/bukkit/plugin/EventExecutor.java
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index a850f078..9026e108 100644
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--- a/src/main/java/org/bukkit/plugin/EventExecutor.java
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+++ b/src/main/java/org/bukkit/plugin/EventExecutor.java
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@@ -5,9 +5,75 @@ import org.bukkit.event.EventException;
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import org.bukkit.event.Listener;
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import org.jetbrains.annotations.NotNull;
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+// Paper start
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+import java.lang.reflect.Method;
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+import java.lang.reflect.Modifier;
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+import java.util.concurrent.ConcurrentHashMap;
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+import java.util.concurrent.ConcurrentMap;
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+import java.util.function.Function;
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+
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+import com.destroystokyo.paper.event.executor.MethodHandleEventExecutor;
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+import com.destroystokyo.paper.event.executor.StaticMethodHandleEventExecutor;
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+import com.destroystokyo.paper.event.executor.asm.ASMEventExecutorGenerator;
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+import com.destroystokyo.paper.event.executor.asm.ClassDefiner;
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+import com.google.common.base.Preconditions;
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+// Paper end
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+
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/**
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* Interface which defines the class for event call backs to plugins
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*/
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public interface EventExecutor {
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public void execute(@NotNull Listener listener, @NotNull Event event) throws EventException;
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+
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+ // Paper start
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+ ConcurrentMap<Method, Class<? extends EventExecutor>> eventExecutorMap = new ConcurrentHashMap<Method, Class<? extends EventExecutor>>() {
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+ @NotNull
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+ @Override
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+ public Class<? extends EventExecutor> computeIfAbsent(@NotNull Method key, @NotNull Function<? super Method, ? extends Class<? extends EventExecutor>> mappingFunction) {
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+ Class<? extends EventExecutor> executorClass = get(key);
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+ if (executorClass != null)
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+ return executorClass;
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+
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+ //noinspection SynchronizationOnLocalVariableOrMethodParameter
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+ synchronized (key) {
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+ executorClass = get(key);
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+ if (executorClass != null)
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+ return executorClass;
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+
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+ return super.computeIfAbsent(key, mappingFunction);
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+ }
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+ }
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+ };
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+
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+ @NotNull
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+ public static EventExecutor create(@NotNull Method m, @NotNull Class<? extends Event> eventClass) {
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+ Preconditions.checkNotNull(m, "Null method");
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+ Preconditions.checkArgument(m.getParameterCount() != 0, "Incorrect number of arguments %s", m.getParameterCount());
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+ Preconditions.checkArgument(m.getParameterTypes()[0] == eventClass, "First parameter %s doesn't match event class %s", m.getParameterTypes()[0], eventClass);
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+ ClassDefiner definer = ClassDefiner.getInstance();
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+ if (Modifier.isStatic(m.getModifiers())) {
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+ return new StaticMethodHandleEventExecutor(eventClass, m);
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+ } else if (definer.isBypassAccessChecks() || Modifier.isPublic(m.getDeclaringClass().getModifiers()) && Modifier.isPublic(m.getModifiers())) {
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+ // get the existing generated EventExecutor class for the Method or generate one
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+ Class<? extends EventExecutor> executorClass = eventExecutorMap.computeIfAbsent(m, (__) -> {
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+ String name = ASMEventExecutorGenerator.generateName();
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+ byte[] classData = ASMEventExecutorGenerator.generateEventExecutor(m, name);
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+ return definer.defineClass(m.getDeclaringClass().getClassLoader(), name, classData).asSubclass(EventExecutor.class);
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+ });
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+
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+ try {
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+ EventExecutor asmExecutor = executorClass.newInstance();
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+ // Define a wrapper to conform to bukkit stupidity (passing in events that don't match and wrapper exception)
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+ return (listener, event) -> {
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+ if (!eventClass.isInstance(event)) return;
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+ asmExecutor.execute(listener, event);
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+ };
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+ } catch (InstantiationException | IllegalAccessException e) {
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+ throw new AssertionError("Unable to initialize generated event executor", e);
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+ }
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+ } else {
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+ return new MethodHandleEventExecutor(eventClass, m);
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+ }
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+ }
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+ // Paper end
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}
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diff --git a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
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index 5cc37eee..e72cbde4 100644
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--- a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
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+++ b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
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@@ -300,21 +300,7 @@ public final class JavaPluginLoader implements PluginLoader {
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}
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}
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- EventExecutor executor = new co.aikar.timings.TimedEventExecutor(new EventExecutor() { // Paper
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- @Override
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- public void execute(@NotNull Listener listener, @NotNull Event event) throws EventException { // Paper
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- try {
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- if (!eventClass.isAssignableFrom(event.getClass())) {
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- return;
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- }
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- method.invoke(listener, event);
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- } catch (InvocationTargetException ex) {
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- throw new EventException(ex.getCause());
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- } catch (Throwable t) {
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- throw new EventException(t);
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- }
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- }
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- }, plugin, method, eventClass); // Paper
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+ EventExecutor executor = new co.aikar.timings.TimedEventExecutor(EventExecutor.create(method, eventClass), plugin, method, eventClass); // Paper // Paper (Yes.) - Use factory method `EventExecutor.create()`
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if (false) { // Spigot - RL handles useTimings check now
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eventSet.add(new TimedRegisteredListener(listener, executor, eh.priority(), plugin, eh.ignoreCancelled()));
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} else {
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--
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2.25.0
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