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cb896d4710
Upstream has released updates that appear 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: 146a7e4b SPIGOT-5345: Add automatic library support CraftBukkit Changes: b1064c69 Remove sisu annotation processor from jar 32e40866 SPIGOT-6189: Persistent data disappears when calling setFacingDirection on an item frame d189f78b # 827: Trigger vanilla dimension advancements in non-main worlds 5bbb4a65 Add plumbing for automatic library support Spigot Changes: 9fb885e8 Rebuild patches
87 lines
4.9 KiB
Diff
87 lines
4.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Mariell Hoversholm <proximyst@proximyst.com>
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Date: Mon, 27 Apr 2020 12:31:59 +0200
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Subject: [PATCH] Prioritise own classes where possible
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This adds the server property `Paper.DisableClassPrioritization` to disable
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prioritization of own classes for plugins' classloaders.
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This value is by default not present, and this will therefore break any
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plugins which abuse behaviour related to not using their own classes
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while still loading their own. This is often an issue with failing to
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relocate or shade properly, such as when shading plugin APIs like Vault.
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A plugin's classloader will first look in the same jar as it is loading
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in for a requested class, then load it. It does not re-use other
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plugins' classes if it has the chance to avoid doing so.
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If a class is not found in the same jar as it is loading for and it does
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find it elsewhere, it will still choose the class elsewhere. This is
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intended behaviour, as it will only prioritise classes it has in its own
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jar, no other plugins' classes will be prioritised in any other order
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than the one they were registered in.
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The patch in general terms just loads the class in the plugin's jar
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before it starts looking elsewhere for it.
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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 ce751577623eaad0f31e2eb7bf0842d1ab73e845..31793f46e5623729dfb4048e901f274082f57826 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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@@ -51,6 +51,7 @@ import org.yaml.snakeyaml.error.YAMLException;
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*/
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public final class JavaPluginLoader implements PluginLoader {
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final Server server;
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+ private static final boolean DISABLE_CLASS_PRIORITIZATION = Boolean.getBoolean("Paper.DisableClassPrioritization"); // Paper
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private final Pattern[] fileFilters = new Pattern[]{Pattern.compile("\\.jar$")};
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private final Map<String, java.util.concurrent.locks.ReentrantReadWriteLock> classLoadLock = new java.util.HashMap<String, java.util.concurrent.locks.ReentrantReadWriteLock>(); // Paper
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private final Map<String, Integer> classLoadLockCount = new java.util.HashMap<String, Integer>(); // Paper
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@@ -203,6 +204,11 @@ public final class JavaPluginLoader implements PluginLoader {
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@Nullable
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Class<?> getClassByName(final String name, boolean resolve, PluginDescriptionFile description) {
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+ // Paper start - prioritize self
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+ return getClassByName(name, resolve, description, null);
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+ }
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+ Class<?> getClassByName(final String name, boolean resolve, PluginDescriptionFile description, PluginClassLoader requester) {
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+ // Paper end
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// Paper start - make MT safe
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java.util.concurrent.locks.ReentrantReadWriteLock lock;
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synchronized (classLoadLock) {
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@@ -210,6 +216,13 @@ public final class JavaPluginLoader implements PluginLoader {
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classLoadLockCount.compute(name, (x, prev) -> prev != null ? prev + 1 : 1);
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}
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lock.writeLock().lock();try {
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+ // Paper start - prioritize self
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+ if (!DISABLE_CLASS_PRIORITIZATION && requester != null) {
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+ try {
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+ return requester.loadClass0(name, false, false, ((SimplePluginManager) server.getPluginManager()).isTransitiveDepend(description, requester.getDescription()));
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+ } catch (ClassNotFoundException cnfe) {}
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+ }
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+ // Paper end
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// Paper end
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for (PluginClassLoader loader : loaders) {
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try {
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diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
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index 22abd85da592c79e312928de596e5d552a45ef12..cfa408e560d85311b474562a6d3860363727eff0 100644
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--- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
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+++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
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@@ -33,7 +33,7 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot
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public JavaPlugin getPlugin() { return plugin; } // Spigot
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private final JavaPluginLoader loader;
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private final Map<String, Class<?>> classes = new ConcurrentHashMap<String, Class<?>>();
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- private final PluginDescriptionFile description;
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+ private final PluginDescriptionFile description; PluginDescriptionFile getDescription() { return description; } // Paper
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private final File dataFolder;
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private final File file;
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private final JarFile jar;
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@@ -117,7 +117,7 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot
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}
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if (checkGlobal) {
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- Class<?> result = loader.getClassByName(name, resolve, description);
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+ Class<?> result = loader.getClassByName(name, resolve, description, this); // Paper - prioritize self
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if (result != null) {
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PluginDescriptionFile provider = ((PluginClassLoader) result.getClassLoader()).description;
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