From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Minecrell Date: Thu, 21 Sep 2017 19:41:20 +0200 Subject: [PATCH] Add workaround for plugins modifying the parent of the plugin logger Essentials uses a custom logger name ("Essentials") instead of the plugin logger. Log messages are redirected to the plugin logger by setting the parent of the "Essentials" logger to the plugin logger. With our changes, the plugin logger is now also called "Essentials", resulting in an infinite loop. Make sure plugins can't change the parent of the plugin logger to avoid this. diff --git a/src/main/java/com/destroystokyo/paper/utils/PaperPluginLogger.java b/src/main/java/com/destroystokyo/paper/utils/PaperPluginLogger.java new file mode 100644 index 0000000000000000000000000000000000000000..76f2cb9cd99cad2a9484eab2becd8c36f1dd91b3 --- /dev/null +++ b/src/main/java/com/destroystokyo/paper/utils/PaperPluginLogger.java @@ -0,0 +1,41 @@ +package com.destroystokyo.paper.utils; + +import org.bukkit.plugin.PluginDescriptionFile; + +import java.util.logging.Level; +import java.util.logging.LogManager; +import java.util.logging.Logger; +import org.jetbrains.annotations.NotNull; + +/** + * Prevents plugins (e.g. Essentials) from changing the parent of the plugin logger. + */ +public class PaperPluginLogger extends Logger { + + @NotNull + public static Logger getLogger(@NotNull PluginDescriptionFile description) { + Logger logger = new PaperPluginLogger(description); + if (!LogManager.getLogManager().addLogger(logger)) { + // Disable this if it's going to happen across reloads anyways... + //logger.log(Level.WARNING, "Could not insert plugin logger - one was already found: {}", LogManager.getLogManager().getLogger(this.getName())); + logger = LogManager.getLogManager().getLogger(description.getPrefix() != null ? description.getPrefix() : description.getName()); + } + + return logger; + } + + private PaperPluginLogger(@NotNull PluginDescriptionFile description) { + super(description.getPrefix() != null ? description.getPrefix() : description.getName(), null); + } + + @Override + public void setParent(@NotNull Logger parent) { + if (getParent() != null) { + warning("Ignoring attempt to change parent of plugin logger"); + } else { + this.log(Level.FINE, "Setting plugin logger parent to {0}", parent); + super.setParent(parent); + } + } + +} diff --git a/src/main/java/org/bukkit/plugin/java/JavaPlugin.java b/src/main/java/org/bukkit/plugin/java/JavaPlugin.java index f99d60ae4003f953b5680a997e9e43e63c035b0c..c943bd801b54519ba6cf5d45aec593d7b7438f99 100644 --- a/src/main/java/org/bukkit/plugin/java/JavaPlugin.java +++ b/src/main/java/org/bukkit/plugin/java/JavaPlugin.java @@ -43,7 +43,7 @@ public abstract class JavaPlugin extends PluginBase { private boolean naggable = true; private FileConfiguration newConfig = null; private File configFile = null; - private Logger logger = null; // Paper - PluginLogger -> Logger + Logger logger = null; // Paper - PluginLogger -> Logger, package-private public JavaPlugin() { final ClassLoader classLoader = this.getClass().getClassLoader(); @@ -277,8 +277,11 @@ public abstract class JavaPlugin extends PluginBase { this.dataFolder = dataFolder; this.classLoader = classLoader; this.configFile = new File(dataFolder, "config.yml"); - // Paper - Handle plugin prefix in implementation - this.logger = Logger.getLogger(description.getPrefix() != null ? description.getPrefix() : description.getName()); + // Paper start + if (this.logger == null) { + this.logger = com.destroystokyo.paper.utils.PaperPluginLogger.getLogger(this.description); + } + // Paper end } /** diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java index 657243776c8a2abb5a57e5c407212a8387d649eb..4fa5f7140ea97e1b6a63808b59115bfb1a85cb32 100644 --- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java +++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java @@ -44,6 +44,7 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot private JavaPlugin pluginInit; private IllegalStateException pluginState; private final Set seenIllegalAccess = Collections.newSetFromMap(new ConcurrentHashMap<>()); + private java.util.logging.Logger logger; // Paper - add field static { ClassLoader.registerAsParallelCapable(); @@ -62,6 +63,8 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot this.url = file.toURI().toURL(); this.libraryLoader = libraryLoader; + this.logger = com.destroystokyo.paper.utils.PaperPluginLogger.getLogger(description); // Paper - Register logger early + try { Class jarClass; try { @@ -229,6 +232,7 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot pluginState = new IllegalStateException("Initial initialization"); this.pluginInit = javaPlugin; + javaPlugin.logger = this.logger; // Paper - set logger javaPlugin.init(loader, loader.server, description, dataFolder, file, this); } }