Purpur/patches/api/0001-Pufferfish-API-Changes.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Kevin Raneri <kevin.raneri@gmail.com>
Date: Tue, 9 Nov 2021 14:01:56 -0500
Subject: [PATCH] Pufferfish API Changes

Pufferfish
Copyright (C) 2022 Pufferfish Studios LLC

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

diff --git a/build.gradle.kts b/build.gradle.kts
index 571534b42cd9c33d6a7bb6fe3bf3a28e33f8e5de..5ceaca1bd75335f85b4876a394ea8c2643cda694 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -66,6 +66,7 @@ dependencies {
     apiAndDocs("net.kyori:adventure-text-logger-slf4j")
     api("org.apache.logging.log4j:log4j-api:$log4jVersion")
     api("org.slf4j:slf4j-api:$slf4jVersion")
+    api("io.sentry:sentry:5.4.0") // Pufferfish
 
     implementation("org.ow2.asm:asm:9.7.1")
     implementation("org.ow2.asm:asm-commons:9.7.1")
@@ -150,6 +151,13 @@ val generateApiVersioningFile by tasks.registering {
     }
 }
 
+// Pufferfish Start
+tasks.withType<JavaCompile> {
+    val compilerArgs = options.compilerArgs
+    compilerArgs.add("--add-modules=jdk.incubator.vector")
+}
+// Pufferfish End
+
 tasks.jar {
     from(generateApiVersioningFile.map { it.outputs.files.singleFile }) {
         into("META-INF/maven/${project.group}/${project.name}")
diff --git a/src/main/java/gg/pufferfish/pufferfish/sentry/SentryContext.java b/src/main/java/gg/pufferfish/pufferfish/sentry/SentryContext.java
new file mode 100644
index 0000000000000000000000000000000000000000..10310fdd53de28efb8a8250f6d3b0c8eb08fb68a
--- /dev/null
+++ b/src/main/java/gg/pufferfish/pufferfish/sentry/SentryContext.java
@@ -0,0 +1,161 @@
+package gg.pufferfish.pufferfish.sentry;
+
+import com.google.gson.Gson;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.Map;
+import java.util.TreeMap;
+import org.apache.logging.log4j.ThreadContext;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Event;
+import org.bukkit.event.player.PlayerEvent;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.RegisteredListener;
+import org.jetbrains.annotations.Nullable;
+
+public class SentryContext {
+	
+	private static final Gson GSON = new Gson();
+	
+	public static void setPluginContext(@Nullable Plugin plugin) {
+		if (plugin != null) {
+			ThreadContext.put("pufferfishsentry_pluginname", plugin.getName());
+			ThreadContext.put("pufferfishsentry_pluginversion", plugin.getDescription().getVersion());
+		}
+	}
+	
+	public static void removePluginContext() {
+		ThreadContext.remove("pufferfishsentry_pluginname");
+		ThreadContext.remove("pufferfishsentry_pluginversion");
+	}
+	
+	public static void setSenderContext(@Nullable CommandSender sender) {
+		if (sender != null) {
+			ThreadContext.put("pufferfishsentry_playername", sender.getName());
+			if (sender instanceof Player player) {
+				ThreadContext.put("pufferfishsentry_playerid", player.getUniqueId().toString());
+			}
+		}
+	}
+	
+	public static void removeSenderContext() {
+		ThreadContext.remove("pufferfishsentry_playername");
+		ThreadContext.remove("pufferfishsentry_playerid");
+	}
+	
+	public static void setEventContext(Event event, RegisteredListener registration) {
+		setPluginContext(registration.getPlugin());
+		
+		try {
+			// Find the player that was involved with this event
+			Player player = null;
+			if (event instanceof PlayerEvent) {
+				player = ((PlayerEvent) event).getPlayer();
+			} else {
+				Class<? extends Event> eventClass = event.getClass();
+				
+				Field playerField = null;
+				
+				for (Field field : eventClass.getDeclaredFields()) {
+					if (field.getType().equals(Player.class)) {
+						playerField = field;
+						break;
+					}
+				}
+				
+				if (playerField != null) {
+					playerField.setAccessible(true);
+					player = (Player) playerField.get(event);
+				}
+			}
+			
+			if (player != null) {
+				setSenderContext(player);
+			}
+		} catch (Exception e) {} // We can't really safely log exceptions.
+		
+		ThreadContext.put("pufferfishsentry_eventdata", GSON.toJson(serializeFields(event)));
+	}
+	
+	public static void removeEventContext() {
+		removePluginContext();
+		removeSenderContext();
+		ThreadContext.remove("pufferfishsentry_eventdata");
+	}
+	
+	private static Map<String, String> serializeFields(Object object) {
+		Map<String, String> fields = new TreeMap<>();
+		fields.put("_class", object.getClass().getName());
+		for (Field declaredField : object.getClass().getDeclaredFields()) {
+			try {
+				if (Modifier.isStatic(declaredField.getModifiers())) {
+					continue;
+				}
+				
+				String fieldName = declaredField.getName();
+				if (fieldName.equals("handlers")) {
+					continue;
+				}
+				declaredField.setAccessible(true);
+				Object value = declaredField.get(object);
+				if (value != null) {
+					fields.put(fieldName, value.toString());
+				} else {
+					fields.put(fieldName, "<null>");
+				}
+			} catch (Exception e) {} // We can't really safely log exceptions.
+		}
+		return fields;
+	}
+	
+	public static class State {
+		
+		private Plugin plugin;
+		private Command command;
+		private String commandLine;
+		private Event event;
+		private RegisteredListener registeredListener;
+		
+		public Plugin getPlugin() {
+			return plugin;
+		}
+		
+		public void setPlugin(Plugin plugin) {
+			this.plugin = plugin;
+		}
+		
+		public Command getCommand() {
+			return command;
+		}
+		
+		public void setCommand(Command command) {
+			this.command = command;
+		}
+		
+		public String getCommandLine() {
+			return commandLine;
+		}
+		
+		public void setCommandLine(String commandLine) {
+			this.commandLine = commandLine;
+		}
+		
+		public Event getEvent() {
+			return event;
+		}
+		
+		public void setEvent(Event event) {
+			this.event = event;
+		}
+		
+		public RegisteredListener getRegisteredListener() {
+			return registeredListener;
+		}
+		
+		public void setRegisteredListener(RegisteredListener registeredListener) {
+			this.registeredListener = registeredListener;
+		}
+	}
+}
diff --git a/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java
new file mode 100644
index 0000000000000000000000000000000000000000..3441cdad70da1bd523c5933b1a914688718c2657
--- /dev/null
+++ b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDChecker.java
@@ -0,0 +1,40 @@
+package gg.pufferfish.pufferfish.simd;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.IntVector;
+import jdk.incubator.vector.VectorSpecies;
+
+/**
+ * Basically, java is annoying and we have to push this out to its own class.
+ */
+@Deprecated
+public class SIMDChecker {
+	
+	@Deprecated
+	public static boolean canEnable(Logger logger) {
+		try {
+			if (SIMDDetection.getJavaVersion() < 17 || SIMDDetection.getJavaVersion() > 21) {
+				return false;
+			} else {
+				SIMDDetection.testRun = true;
+				
+				VectorSpecies<Integer> ISPEC = IntVector.SPECIES_PREFERRED;
+				VectorSpecies<Float> FSPEC = FloatVector.SPECIES_PREFERRED;
+				
+				logger.log(Level.INFO, "Max SIMD vector size on this system is " + ISPEC.vectorBitSize() + " bits (int)");
+				logger.log(Level.INFO, "Max SIMD vector size on this system is " + FSPEC.vectorBitSize() + " bits (float)");
+				
+				if (ISPEC.elementSize() < 2 || FSPEC.elementSize() < 2) {
+					logger.log(Level.WARNING, "SIMD is not properly supported on this system!");
+					return false;
+				}
+
+				return true;
+			}
+		} catch (NoClassDefFoundError | Exception ignored) {} // Basically, we don't do anything. This lets us detect if it's not functional and disable it.
+		return false;
+	}
+	
+}
diff --git a/src/main/java/gg/pufferfish/pufferfish/simd/SIMDDetection.java b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDDetection.java
new file mode 100644
index 0000000000000000000000000000000000000000..a84889d3e9cfc4d7ab5f867820a6484c6070711b
--- /dev/null
+++ b/src/main/java/gg/pufferfish/pufferfish/simd/SIMDDetection.java
@@ -0,0 +1,35 @@
+package gg.pufferfish.pufferfish.simd;
+
+import java.util.logging.Logger;
+
+@Deprecated
+public class SIMDDetection {
+	
+	public static boolean isEnabled = false;
+	public static boolean versionLimited = false;
+	public static boolean testRun = false;
+	
+	@Deprecated
+	public static boolean canEnable(Logger logger) {
+		try {
+			return SIMDChecker.canEnable(logger);
+		} catch (NoClassDefFoundError | Exception ignored) {
+			return false;
+		}
+	}
+	
+	@Deprecated
+	public static int getJavaVersion() {
+		// https://stackoverflow.com/a/2591122
+		String version = System.getProperty("java.version");
+		if(version.startsWith("1.")) {
+			version = version.substring(2, 3);
+		} else {
+			int dot = version.indexOf(".");
+			if(dot != -1) { version = version.substring(0, dot); }
+		}
+		version = version.split("-")[0]; // Azul is stupid
+		return Integer.parseInt(version);
+	}
+	
+}
diff --git a/src/main/java/gg/pufferfish/pufferfish/simd/VectorMapPalette.java b/src/main/java/gg/pufferfish/pufferfish/simd/VectorMapPalette.java
new file mode 100644
index 0000000000000000000000000000000000000000..ae2464920c9412ac90b819a540ee58be0741465f
--- /dev/null
+++ b/src/main/java/gg/pufferfish/pufferfish/simd/VectorMapPalette.java
@@ -0,0 +1,83 @@
+package gg.pufferfish.pufferfish.simd;
+
+import java.awt.Color;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.IntVector;
+import jdk.incubator.vector.VectorMask;
+import jdk.incubator.vector.VectorSpecies;
+import org.bukkit.map.MapPalette;
+
+@Deprecated
+public class VectorMapPalette {
+	
+	private static final VectorSpecies<Integer> I_SPEC = IntVector.SPECIES_PREFERRED;
+	private static final VectorSpecies<Float> F_SPEC = FloatVector.SPECIES_PREFERRED;
+	
+	@Deprecated
+	public static void matchColorVectorized(int[] in, byte[] out) {
+		int speciesLength = I_SPEC.length();
+		int i;
+		for (i = 0; i < in.length - speciesLength; i += speciesLength) {
+			float[] redsArr = new float[speciesLength];
+			float[] bluesArr = new float[speciesLength];
+			float[] greensArr = new float[speciesLength];
+			int[] alphasArr = new int[speciesLength];
+			
+			for (int j = 0; j < speciesLength; j++) {
+				alphasArr[j] = (in[i + j] >> 24) & 0xFF;
+				redsArr[j] = (in[i + j] >> 16) & 0xFF;
+				greensArr[j] = (in[i + j] >> 8) & 0xFF;
+				bluesArr[j] = (in[i + j] >> 0) & 0xFF;
+			}
+			
+			IntVector alphas = IntVector.fromArray(I_SPEC, alphasArr, 0);
+			FloatVector reds = FloatVector.fromArray(F_SPEC, redsArr, 0);
+			FloatVector greens = FloatVector.fromArray(F_SPEC, greensArr, 0);
+			FloatVector blues = FloatVector.fromArray(F_SPEC, bluesArr, 0);
+			IntVector resultIndex = IntVector.zero(I_SPEC);
+			VectorMask<Integer> modificationMask = VectorMask.fromLong(I_SPEC, 0xffffffff);
+			
+			modificationMask = modificationMask.and(alphas.lt(128).not());
+			FloatVector bestDistances = FloatVector.broadcast(F_SPEC, Float.MAX_VALUE);
+			
+			for (int c = 4; c < MapPalette.colors.length; c++) {
+				// We're using 32-bit floats here because it's 2x faster and nobody will know the difference.
+				// For correctness, the original algorithm uses 64-bit floats instead. Completely unnecessary.
+				FloatVector compReds = FloatVector.broadcast(F_SPEC, MapPalette.colors[c].getRed());
+				FloatVector compGreens = FloatVector.broadcast(F_SPEC, MapPalette.colors[c].getGreen());
+				FloatVector compBlues = FloatVector.broadcast(F_SPEC, MapPalette.colors[c].getBlue());
+				
+				FloatVector rMean = reds.add(compReds).div(2.0f);
+				FloatVector rDiff = reds.sub(compReds);
+				FloatVector gDiff = greens.sub(compGreens);
+				FloatVector bDiff = blues.sub(compBlues);
+				
+				FloatVector weightR = rMean.div(256.0f).add(2);
+				FloatVector weightG = FloatVector.broadcast(F_SPEC, 4.0f);
+				FloatVector weightB = FloatVector.broadcast(F_SPEC, 255.0f).sub(rMean).div(256.0f).add(2.0f);
+				
+				FloatVector distance = weightR.mul(rDiff).mul(rDiff).add(weightG.mul(gDiff).mul(gDiff)).add(weightB.mul(bDiff).mul(bDiff));
+				
+				// Now we compare to the best distance we've found.
+				// This mask contains a "1" if better, and a "0" otherwise.
+				VectorMask<Float> bestDistanceMask = distance.lt(bestDistances);
+				bestDistances = bestDistances.blend(distance, bestDistanceMask); // Update the best distances
+				
+				// Update the result array
+				// We also AND with the modification mask because we don't want to interfere if the alpha value isn't large enough.
+				resultIndex = resultIndex.blend(c, bestDistanceMask.cast(I_SPEC).and(modificationMask)); // Update the results
+			}
+			
+			for (int j = 0; j < speciesLength; j++) {
+				int index = resultIndex.lane(j);
+				out[i + j] = (byte) (index < 128 ? index : -129 + (index - 127));
+			}
+		}
+		
+		// For the final ones, fall back to the regular method
+		for (; i < in.length; i++) {
+			out[i] = MapPalette.matchColor(new Color(in[i], true));
+		}
+	}
+	
+}
diff --git a/src/main/java/org/bukkit/map/MapPalette.java b/src/main/java/org/bukkit/map/MapPalette.java
index 6995f9cc08d162e3adcd3a28f6bfa6d329661999..b9edb96fc5bac8793477657dbb45ccf98ab17f27 100644
--- a/src/main/java/org/bukkit/map/MapPalette.java
+++ b/src/main/java/org/bukkit/map/MapPalette.java
@@ -1,6 +1,7 @@
 package org.bukkit.map;
 
 import com.google.common.base.Preconditions;
+import gg.pufferfish.pufferfish.simd.SIMDDetection; // Pufferfish
 import java.awt.Color;
 import java.awt.Graphics2D;
 import java.awt.Image;
@@ -45,7 +46,7 @@ public final class MapPalette {
     }
 
     @NotNull
-    static final Color[] colors = {
+    public static final Color[] colors = { // Pufferfish - public access
         c(0, 0, 0, 0), c(0, 0, 0, 0), c(0, 0, 0, 0), c(0, 0, 0, 0),
         c(89, 125, 39), c(109, 153, 48), c(127, 178, 56), c(67, 94, 29),
         c(174, 164, 115), c(213, 201, 140), c(247, 233, 163), c(130, 123, 86),
@@ -216,9 +217,15 @@ public final class MapPalette {
         temp.getRGB(0, 0, temp.getWidth(), temp.getHeight(), pixels, 0, temp.getWidth());
 
         byte[] result = new byte[temp.getWidth() * temp.getHeight()];
+        // Pufferfish start
+        if (!SIMDDetection.isEnabled) {
         for (int i = 0; i < pixels.length; i++) {
             result[i] = matchColor(new Color(pixels[i], true));
         }
+        } else {
+            gg.pufferfish.pufferfish.simd.VectorMapPalette.matchColorVectorized(pixels, result);
+        }
+        // Pufferfish end
         return result;
     }
 
diff --git a/src/main/java/org/bukkit/plugin/SimplePluginManager.java b/src/main/java/org/bukkit/plugin/SimplePluginManager.java
index 001465eedafa51ac027a4db51cba6223edfe1171..2e6d62c4f3687e299c34e876c503b400e13be05a 100644
--- a/src/main/java/org/bukkit/plugin/SimplePluginManager.java
+++ b/src/main/java/org/bukkit/plugin/SimplePluginManager.java
@@ -597,7 +597,9 @@ public final class SimplePluginManager implements PluginManager {
 
     // Paper start
     private void handlePluginException(String msg, Throwable ex, Plugin plugin) {
+        gg.pufferfish.pufferfish.sentry.SentryContext.setPluginContext(plugin); // Pufferfish
         server.getLogger().log(Level.SEVERE, msg, ex);
+        gg.pufferfish.pufferfish.sentry.SentryContext.removePluginContext(); // Pufferfish
         callEvent(new com.destroystokyo.paper.event.server.ServerExceptionEvent(new com.destroystokyo.paper.exception.ServerPluginEnableDisableException(msg, ex, plugin)));
     }
     // Paper end
@@ -667,9 +669,11 @@ public final class SimplePluginManager implements PluginManager {
                             ));
                 }
             } catch (Throwable ex) {
+                gg.pufferfish.pufferfish.sentry.SentryContext.setEventContext(event, registration); // Pufferfish
                 // Paper start - error reporting
                 String msg = "Could not pass event " + event.getEventName() + " to " + registration.getPlugin().getDescription().getFullName();
                 server.getLogger().log(Level.SEVERE, msg, ex);
+                gg.pufferfish.pufferfish.sentry.SentryContext.removeEventContext(); // Pufferfish
                 if (!(event instanceof com.destroystokyo.paper.event.server.ServerExceptionEvent)) { // We don't want to cause an endless event loop
                     callEvent(new com.destroystokyo.paper.event.server.ServerExceptionEvent(new com.destroystokyo.paper.exception.ServerEventException(msg, ex, registration.getPlugin(), registration.getListener(), event)));
                 }
diff --git a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
index b412aaf08901d169ac9fc89b36f9d6ccb95c53d3..45a9ca8969f635d20cc44c062fda85bbccd8f8ff 100644
--- a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
+++ b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
@@ -336,7 +336,13 @@ public final class JavaPluginLoader implements PluginLoader {
             try {
                 jPlugin.setEnabled(true);
             } catch (Throwable ex) {
+                gg.pufferfish.pufferfish.sentry.SentryContext.setPluginContext(plugin); // Pufferfish
                 server.getLogger().log(Level.SEVERE, "Error occurred while enabling " + plugin.getDescription().getFullName() + " (Is it up to date?)", ex);
+                gg.pufferfish.pufferfish.sentry.SentryContext.removePluginContext(); // Pufferfish
+                // Paper start - Disable plugins that fail to load
+                this.server.getPluginManager().disablePlugin(jPlugin);
+                return;
+                // Paper end
             }
 
             // Perhaps abort here, rather than continue going, but as it stands,
@@ -361,7 +367,9 @@ public final class JavaPluginLoader implements PluginLoader {
             try {
                 jPlugin.setEnabled(false);
             } catch (Throwable ex) {
+                gg.pufferfish.pufferfish.sentry.SentryContext.setPluginContext(plugin); // Pufferfish
                 server.getLogger().log(Level.SEVERE, "Error occurred while disabling " + plugin.getDescription().getFullName() + " (Is it up to date?)", ex);
+                gg.pufferfish.pufferfish.sentry.SentryContext.removePluginContext(); // Pufferfish
             }
 
             if (cloader instanceof PluginClassLoader) {
diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
index 7e4f7cb2afbc145e532285c793573ad107bc3033..12449e18180d604e9cbbc744da74a8b222a18e1f 100644
--- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
+++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
@@ -50,6 +50,8 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
     private io.papermc.paper.plugin.provider.classloader.PluginClassLoaderGroup classLoaderGroup; // Paper
     public io.papermc.paper.plugin.provider.entrypoint.DependencyContext dependencyContext; // Paper
 
+    private boolean closed = false; // Pufferfish
+
     static {
         ClassLoader.registerAsParallelCapable();
     }
@@ -197,6 +199,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
         throw new ClassNotFoundException(name);
     }
 
+    public boolean _airplane_hasClass(@NotNull String name) { return this.classes.containsKey(name); } // Pufferfish
     @Override
     protected Class<?> findClass(String name) throws ClassNotFoundException {
         if (name.startsWith("org.bukkit.") || name.startsWith("net.minecraft.")) {
@@ -204,7 +207,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
         }
         Class<?> result = classes.get(name);
 
-        if (result == null) {
+        if (result == null && !this.closed) { // Pufferfish
             String path = name.replace('.', '/').concat(".class");
             JarEntry entry = jar.getJarEntry(path);
 
@@ -251,6 +254,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
             this.setClass(name, result); // Paper
         }
 
+        if (result == null) throw new ClassNotFoundException(name); // Pufferfish
         return result;
     }
 
@@ -265,6 +269,7 @@ public final class PluginClassLoader extends URLClassLoader implements io.paperm
             // Paper end
             super.close();
         } finally {
+            this.closed = true; // Pufferfish
             jar.close();
         }
     }