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Upstream has released updates that appears 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: b999860d SPIGOT-2304: Add LootGenerateEvent CraftBukkit Changes:77fd87e4SPIGOT-2304: Implement LootGenerateEventa1a705eeSPIGOT-5566: Doused campfires & fires should call EntityChangeBlockEvent41712eddSPIGOT-5707: PersistentDataHolder not Persistent on API dropped Item
62 lines
2.6 KiB
Diff
62 lines
2.6 KiB
Diff
From 49584133dc28884b641698f3b8996b0b1d60642c Mon Sep 17 00:00:00 2001
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From: Trigary <trigary0@gmail.com>
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Date: Wed, 15 Apr 2020 01:24:55 -0400
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Subject: [PATCH] Make JavaPluginLoader thread-safe
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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 8ff228ced..ba2c5c6ee 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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@@ -52,6 +52,8 @@ public final class JavaPluginLoader implements PluginLoader {
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final Server server;
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private final Pattern[] fileFilters = new Pattern[]{Pattern.compile("\\.jar$")};
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private final Map<String, Class<?>> classes = new ConcurrentHashMap<String, Class<?>>();
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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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private final List<PluginClassLoader> loaders = new CopyOnWriteArrayList<PluginClassLoader>();
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/**
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@@ -191,7 +193,19 @@ public final class JavaPluginLoader implements PluginLoader {
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@Nullable
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Class<?> getClassByName(final String name) {
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+ // Paper start - make MT safe
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Class<?> cachedClass = classes.get(name);
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+ if (cachedClass != null) {
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+ return cachedClass;
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+ }
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+ java.util.concurrent.locks.ReentrantReadWriteLock lock;
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+ synchronized (classLoadLock) {
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+ lock = classLoadLock.computeIfAbsent(name, (x) -> new java.util.concurrent.locks.ReentrantReadWriteLock());
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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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+ cachedClass = classes.get(name);
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+ // Paper end
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if (cachedClass != null) {
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return cachedClass;
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@@ -205,6 +219,19 @@ public final class JavaPluginLoader implements PluginLoader {
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}
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}
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}
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+ // Paper start - make MT safe
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+ } finally {
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+ synchronized (classLoadLock) {
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+ lock.writeLock().unlock();
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+ if (classLoadLockCount.get(name) == 1) {
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+ classLoadLock.remove(name);
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+ classLoadLockCount.remove(name);
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+ } else {
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+ classLoadLockCount.compute(name, (x, prev) -> prev - 1);
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+ }
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+ }
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+ }
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+ // Paper end
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return null;
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}
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--
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2.26.2
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