Paper/patches/server/0444-Fix-AdvancementDataPlayer-leak-due-from-quitting-ear.patch

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2021-06-14 12:42:08 +02:00
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
Rewrite chunk system (#8177) Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
2021-06-14 12:42:08 +02:00
Date: Mon, 13 Jul 2020 06:22:54 -0700
Subject: [PATCH] Fix AdvancementDataPlayer leak due from quitting early in
login
Move the criterion storage to the AdvancementDataPlayer object
itself, so the criterion object stores no references - and thus
needs no cleanup.
diff --git a/src/main/java/net/minecraft/advancements/critereon/SimpleCriterionTrigger.java b/src/main/java/net/minecraft/advancements/critereon/SimpleCriterionTrigger.java
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index 70d4467e8e4dd9be38a7bfe8494efb6e67e18b9a..4b0e967fac5adb54b2d26ee8f7a1ced259ad11db 100644
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--- a/src/main/java/net/minecraft/advancements/critereon/SimpleCriterionTrigger.java
+++ b/src/main/java/net/minecraft/advancements/critereon/SimpleCriterionTrigger.java
@@ -14,22 +14,24 @@ import net.minecraft.server.level.ServerPlayer;
import net.minecraft.world.level.storage.loot.LootContext;
public abstract class SimpleCriterionTrigger<T extends AbstractCriterionTriggerInstance> implements CriterionTrigger<T> {
- private final Map<PlayerAdvancements, Set<CriterionTrigger.Listener<T>>> players = Maps.newIdentityHashMap();
+ //private final Map<PlayerAdvancements, Set<CriterionTrigger.Listener<T>>> players = Maps.newIdentityHashMap(); // Paper - moved into AdvancementDataPlayer to fix memory leak
+
+ public SimpleCriterionTrigger() {}
@Override
public final void addPlayerListener(PlayerAdvancements manager, CriterionTrigger.Listener<T> conditions) {
- this.players.computeIfAbsent(manager, (managerx) -> {
+ manager.criterionData.computeIfAbsent(this, (managerx) -> { // Paper - fix AdvancementDataPlayer leak
return Sets.newHashSet();
}).add(conditions);
}
@Override
public final void removePlayerListener(PlayerAdvancements manager, CriterionTrigger.Listener<T> conditions) {
- Set<CriterionTrigger.Listener<T>> set = this.players.get(manager);
+ Set<CriterionTrigger.Listener<T>> set = (Set) manager.criterionData.get(this); // Paper - fix AdvancementDataPlayer leak
if (set != null) {
set.remove(conditions);
if (set.isEmpty()) {
- this.players.remove(manager);
+ manager.criterionData.remove(this); // Paper - fix AdvancementDataPlayer leak
}
}
@@ -37,7 +39,7 @@ public abstract class SimpleCriterionTrigger<T extends AbstractCriterionTriggerI
@Override
public final void removePlayerListeners(PlayerAdvancements tracker) {
- this.players.remove(tracker);
+ tracker.criterionData.remove(this); // Paper - fix AdvancementDataPlayer leak
}
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protected abstract T createInstance(JsonObject obj, ContextAwarePredicate playerPredicate, DeserializationContext predicateDeserializer);
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@@ -50,7 +52,7 @@ public abstract class SimpleCriterionTrigger<T extends AbstractCriterionTriggerI
protected void trigger(ServerPlayer player, Predicate<T> predicate) {
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PlayerAdvancements playerAdvancements = player.getAdvancements();
- Set<CriterionTrigger.Listener<T>> set = this.players.get(playerAdvancements);
+ Set<CriterionTrigger.Listener<T>> set = (Set) playerAdvancements.criterionData.get(this); // Paper - fix AdvancementDataPlayer leak
if (set != null && !set.isEmpty()) {
LootContext lootContext = EntityPredicate.createContext(player, player);
List<CriterionTrigger.Listener<T>> list = null;
diff --git a/src/main/java/net/minecraft/server/PlayerAdvancements.java b/src/main/java/net/minecraft/server/PlayerAdvancements.java
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index 100781852965e09c92aca34785673c5de51c7107..9034faaf7b169788abad01d3da9c65ad5ddc4b8b 100644
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--- a/src/main/java/net/minecraft/server/PlayerAdvancements.java
+++ b/src/main/java/net/minecraft/server/PlayerAdvancements.java
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@@ -62,6 +62,7 @@ public class PlayerAdvancements {
@Nullable
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private Advancement lastSelectedTab;
private boolean isFirstPacket = true;
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+ public final Map<net.minecraft.advancements.critereon.SimpleCriterionTrigger, Set<CriterionTrigger.Listener>> criterionData = new java.util.IdentityHashMap<>(); // Paper - fix advancement data player leakage
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public PlayerAdvancements(DataFixer dataFixer, PlayerList playerManager, ServerAdvancementManager advancementLoader, Path filePath, ServerPlayer owner) {
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this.dataFixer = dataFixer;