From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Minecrell <minecrell@minecrell.net> 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 bb2e55e97bf887a28cac7d4f9a0a23960d22cf56..04fa3991f6ce4e9dad804f28fc6c947695857089 100644 --- a/src/main/java/org/bukkit/plugin/java/JavaPlugin.java +++ b/src/main/java/org/bukkit/plugin/java/JavaPlugin.java @@ -42,7 +42,7 @@ 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(); @@ -276,8 +276,11 @@ 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 13100c688bfccb826b3072aaa92901f8634cf9ab..b9766b9b47547c400ed075f1635bb1461cb5e860 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<String> 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 { @@ -222,6 +225,7 @@ 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); } }