mirror of
https://github.com/PaperMC/Paper.git
synced 2024-08-22 20:33:30 +02:00
353 lines
14 KiB
Diff
353 lines
14 KiB
Diff
From 7e35c9c03a1fe023e8da7de1718f60e00298c6b5 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 methods.
|
|
|
|
diff --git a/pom.xml b/pom.xml
|
|
index 0b615b4..1ad108e 100644
|
|
--- a/pom.xml
|
|
+++ b/pom.xml
|
|
@@ -112,6 +112,12 @@
|
|
<version>1.3</version>
|
|
<scope>test</scope>
|
|
</dependency>
|
|
+ <!-- ASM -->
|
|
+ <dependency>
|
|
+ <groupId>org.ow2.asm</groupId>
|
|
+ <artifactId>asm-all</artifactId>
|
|
+ <version>5.0.4</version>
|
|
+ </dependency>
|
|
</dependencies>
|
|
|
|
<build>
|
|
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 0000000..9ff99e3
|
|
--- /dev/null
|
|
+++ b/src/main/java/com/destroystokyo/paper/event/executor/MethodHandleEventExecutor.java
|
|
@@ -0,0 +1,40 @@
|
|
+package com.destroystokyo.paper.event.executor;
|
|
+
|
|
+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;
|
|
+
|
|
+public class MethodHandleEventExecutor implements EventExecutor {
|
|
+ private final Class<? extends Event> eventClass;
|
|
+ private final MethodHandle handle;
|
|
+
|
|
+ public MethodHandleEventExecutor(Class<? extends Event> eventClass, MethodHandle handle) {
|
|
+ this.eventClass = eventClass;
|
|
+ this.handle = handle;
|
|
+ }
|
|
+
|
|
+ public MethodHandleEventExecutor(Class<? extends Event> eventClass, Method m) {
|
|
+ this.eventClass = eventClass;
|
|
+ try {
|
|
+ m.setAccessible(true);
|
|
+ this.handle = MethodHandles.lookup().unreflect(m);
|
|
+ } catch (IllegalAccessException e) {
|
|
+ throw new AssertionError("Unable to set accessible", e);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void execute(Listener listener, Event event) throws EventException {
|
|
+ if (!eventClass.isInstance(event)) return;
|
|
+ try {
|
|
+ handle.invoke(listener, event);
|
|
+ } catch (Throwable t) {
|
|
+ throw new EventException(t);
|
|
+ }
|
|
+ }
|
|
+}
|
|
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 0000000..45c2330
|
|
--- /dev/null
|
|
+++ b/src/main/java/com/destroystokyo/paper/event/executor/asm/ASMEventExecutorGenerator.java
|
|
@@ -0,0 +1,44 @@
|
|
+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.objectweb.asm.ClassWriter;
|
|
+import org.objectweb.asm.Type;
|
|
+import org.objectweb.asm.commons.GeneratorAdapter;
|
|
+
|
|
+import static org.objectweb.asm.Opcodes.*;
|
|
+
|
|
+public class ASMEventExecutorGenerator {
|
|
+ public static byte[] generateEventExecutor(Method m, String name) {
|
|
+ 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)});
|
|
+ // 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", "(Lorg/bukkit/event/Listener;Lorg/bukkit/event/Event;)V", null, null), ACC_PUBLIC, "execute", "(Lorg/bukkit/event/Listener;Lorg/bukkit/event/Listener;)V");;
|
|
+ methodGenerator.loadArg(0);
|
|
+ methodGenerator.checkCast(Type.getType(m.getDeclaringClass()));
|
|
+ methodGenerator.loadArg(1);
|
|
+ methodGenerator.checkCast(Type.getType(m.getParameterTypes()[0]));
|
|
+ methodGenerator.visitMethodInsn(INVOKEVIRTUAL, Type.getInternalName(m.getDeclaringClass()), m.getName(), Type.getMethodDescriptor(m), m.getDeclaringClass().isInterface());
|
|
+ if (m.getReturnType() != void.class) {
|
|
+ methodGenerator.pop();
|
|
+ }
|
|
+ methodGenerator.returnValue();
|
|
+ methodGenerator.endMethod();
|
|
+ writer.visitEnd();
|
|
+ return writer.toByteArray();
|
|
+ }
|
|
+
|
|
+ public static AtomicInteger NEXT_ID = new AtomicInteger(1);
|
|
+ public static String generateName() {
|
|
+ int id = NEXT_ID.getAndIncrement();
|
|
+ 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 0000000..6941d9f
|
|
--- /dev/null
|
|
+++ b/src/main/java/com/destroystokyo/paper/event/executor/asm/ClassDefiner.java
|
|
@@ -0,0 +1,32 @@
|
|
+package com.destroystokyo.paper.event.executor.asm;
|
|
+
|
|
+import com.destroystokyo.paper.utils.UnsafeUtils;
|
|
+
|
|
+public interface ClassDefiner {
|
|
+
|
|
+ /**
|
|
+ * Returns if the defined classes can bypass access checks
|
|
+ *
|
|
+ * @return if classes bypass access checks
|
|
+ */
|
|
+ public default boolean isBypassAccessChecks() {
|
|
+ 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
|
|
+ */
|
|
+ public Class<?> defineClass(ClassLoader parentLoader, String name, byte[] data);
|
|
+
|
|
+ public static ClassDefiner getInstance() {
|
|
+ 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 0000000..776a9a0
|
|
--- /dev/null
|
|
+++ b/src/main/java/com/destroystokyo/paper/event/executor/asm/SafeClassDefiner.java
|
|
@@ -0,0 +1,62 @@
|
|
+package com.destroystokyo.paper.event.executor.asm;
|
|
+
|
|
+import java.util.concurrent.ConcurrentHashMap;
|
|
+import java.util.concurrent.ConcurrentMap;
|
|
+
|
|
+import com.google.common.base.Preconditions;
|
|
+
|
|
+import org.objectweb.asm.Type;
|
|
+
|
|
+public class SafeClassDefiner implements ClassDefiner {
|
|
+ /* default */ static final SafeClassDefiner INSTANCE = new SafeClassDefiner();
|
|
+
|
|
+ private SafeClassDefiner() {}
|
|
+
|
|
+ private final ConcurrentMap<ClassLoader, GeneratedClassLoader> loaders = new ConcurrentHashMap<>();
|
|
+
|
|
+ @Override
|
|
+ public Class<?> defineClass(ClassLoader parentLoader, String name, byte[] data) {
|
|
+ GeneratedClassLoader loader = loaders.computeIfAbsent(parentLoader, GeneratedClassLoader::new);
|
|
+ synchronized (loader.getClassLoadingLock(name)) {
|
|
+ Preconditions.checkState(!loader.hasClass(name), "%s already defined", name);
|
|
+ Class<?> c = loader.define(name, data);
|
|
+ assert c.getName().equals(name);
|
|
+ return c;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ private static class GeneratedClassLoader extends ClassLoader {
|
|
+ static {
|
|
+ ClassLoader.registerAsParallelCapable();
|
|
+ }
|
|
+
|
|
+ protected GeneratedClassLoader(ClassLoader parent) {
|
|
+ super(parent);
|
|
+ }
|
|
+
|
|
+ private Class<?> define(String name, byte[] data) {
|
|
+ synchronized (getClassLoadingLock(name)) {
|
|
+ assert !hasClass(name);
|
|
+ Class<?> c = defineClass(name, data, 0, data.length);
|
|
+ resolveClass(c);
|
|
+ return c;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public Object getClassLoadingLock(String name) {
|
|
+ return super.getClassLoadingLock(name);
|
|
+ }
|
|
+
|
|
+ public boolean hasClass(String name) {
|
|
+ synchronized (getClassLoadingLock(name)) {
|
|
+ try {
|
|
+ Class.forName(name);
|
|
+ return true;
|
|
+ } catch (ClassNotFoundException e) {
|
|
+ return false;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/com/destroystokyo/paper/utils/UnsafeUtils.java b/src/main/java/com/destroystokyo/paper/utils/UnsafeUtils.java
|
|
new file mode 100644
|
|
index 0000000..62acbf8
|
|
--- /dev/null
|
|
+++ b/src/main/java/com/destroystokyo/paper/utils/UnsafeUtils.java
|
|
@@ -0,0 +1,33 @@
|
|
+package com.destroystokyo.paper.utils;
|
|
+
|
|
+import sun.misc.Unsafe;
|
|
+
|
|
+import java.lang.reflect.Field;
|
|
+
|
|
+public class UnsafeUtils {
|
|
+ private UnsafeUtils() {}
|
|
+
|
|
+ private static final Unsafe UNSAFE;
|
|
+ static {
|
|
+ Unsafe unsafe;
|
|
+ try {
|
|
+ Class c = Class.forName("sun.misc.Unsafe");
|
|
+ Field f = c.getDeclaredField("theUnsafe");
|
|
+ f.setAccessible(true);
|
|
+ unsafe = (Unsafe) f.get(null);
|
|
+ } catch (ClassNotFoundException | NoSuchFieldException | SecurityException e) {
|
|
+ unsafe = null;
|
|
+ } catch (IllegalAccessException e) {
|
|
+ throw new AssertionError(e);
|
|
+ }
|
|
+ UNSAFE = unsafe;
|
|
+ }
|
|
+
|
|
+ public static boolean isUnsafeSupported() {
|
|
+ return UNSAFE != null;
|
|
+ }
|
|
+
|
|
+ public static Unsafe getUnsafe() {
|
|
+ return UNSAFE;
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/org/bukkit/plugin/EventExecutor.java b/src/main/java/org/bukkit/plugin/EventExecutor.java
|
|
index 3b2c99e..7b92ce0 100644
|
|
--- a/src/main/java/org/bukkit/plugin/EventExecutor.java
|
|
+++ b/src/main/java/org/bukkit/plugin/EventExecutor.java
|
|
@@ -4,9 +4,53 @@ import org.bukkit.event.Event;
|
|
import org.bukkit.event.EventException;
|
|
import org.bukkit.event.Listener;
|
|
|
|
+// Paper start
|
|
+import java.lang.reflect.Method;
|
|
+import java.lang.reflect.Modifier;
|
|
+
|
|
+import com.destroystokyo.paper.event.executor.MethodHandleEventExecutor;
|
|
+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(Listener listener, Event event) throws EventException;
|
|
+
|
|
+ // Paper start
|
|
+ public static EventExecutor create(Method m, 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);
|
|
+ Preconditions.checkArgument(!Modifier.isStatic(m.getModifiers()), "Static method %s", m.getName());
|
|
+ ClassDefiner definer = ClassDefiner.getInstance();
|
|
+ if (definer.isBypassAccessChecks() || Modifier.isPublic(m.getDeclaringClass().getModifiers()) && Modifier.isPublic(m.getModifiers())) {
|
|
+ String name = ASMEventExecutorGenerator.generateName();
|
|
+ byte[] classData = ASMEventExecutorGenerator.generateEventExecutor(m, name);
|
|
+ Class<? extends EventExecutor> c = definer.defineClass(m.getDeclaringClass().getClassLoader(), name, classData).asSubclass(EventExecutor.class);
|
|
+ try {
|
|
+ EventExecutor asmExecutor = c.newInstance();
|
|
+ // Define a wrapper to conform to bukkit stupidity (passing in events that don't match and wrapper exception)
|
|
+ return new EventExecutor() {
|
|
+ @Override
|
|
+ public void execute(Listener listener, Event event) throws EventException {
|
|
+ if (!eventClass.isInstance(event)) return;
|
|
+ try {
|
|
+ asmExecutor.execute(listener, event);
|
|
+ } catch (Exception e) {
|
|
+ throw new EventException(e);
|
|
+ }
|
|
+ }
|
|
+ };
|
|
+ } catch (InstantiationException | IllegalAccessException e) {
|
|
+ throw new AssertionError("Unable to initialize generated event executor", e);
|
|
+ }
|
|
+ } else {
|
|
+ return new MethodHandleEventExecutor(eventClass, m);
|
|
+ }
|
|
+ }
|
|
+ // Paper end
|
|
}
|
|
diff --git a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
|
|
index 93a43dd..7229b25 100644
|
|
--- a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
|
|
+++ b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
|
|
@@ -291,20 +291,7 @@ public final class JavaPluginLoader implements PluginLoader {
|
|
}
|
|
}
|
|
|
|
- EventExecutor executor = new co.aikar.timings.TimedEventExecutor(new EventExecutor() { // Spigot
|
|
- public void execute(Listener listener, Event event) throws EventException {
|
|
- try {
|
|
- if (!eventClass.isAssignableFrom(event.getClass())) {
|
|
- return;
|
|
- }
|
|
- method.invoke(listener, event);
|
|
- } catch (InvocationTargetException ex) {
|
|
- throw new EventException(ex.getCause());
|
|
- } catch (Throwable t) {
|
|
- throw new EventException(t);
|
|
- }
|
|
- }
|
|
- }, plugin, method, eventClass); // Spigot
|
|
+ EventExecutor executor = new co.aikar.timings.TimedEventExecutor(EventExecutor.create(method, eventClass), plugin, method, eventClass); // Spigot // Paper - Use factory method `EventExecutor.create()`
|
|
if (false) { // Spigot - RL handles useTimings check now
|
|
eventSet.add(new TimedRegisteredListener(listener, executor, eh.priority(), plugin, eh.ignoreCancelled()));
|
|
} else {
|
|
--
|
|
2.7.2
|
|
|