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de04cbced5
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: f29cb801 Separate checkstyle-suppressions file is not required 86f99bbe SPIGOT-7540, PR-946: Add ServerTickManager API d4119585 SPIGOT-6903, PR-945: Add BlockData#getMapColor b7a2ed41 SPIGOT-7530, PR-947: Add Player#removeResourcePack 9dd56255 SPIGOT-7527, PR-944: Add WindCharge#explode() 994a6163 Attempt upgrade of resolver libraries CraftBukkit Changes: b3b43a6ad Add Checkstyle check for unused imports 13fb3358e SPIGOT-7544: Scoreboard#getEntries() doesn't get entries but class names 3dda99c06 SPIGOT-7540, PR-1312: Add ServerTickManager API 2ab4508c0 SPIGOT-6903, PR-1311: Add BlockData#getMapColor 1dbdbbed4 PR-1238: Remove unnecessary sign ticking 659728d2a MC-264285, SPIGOT-7439, PR-1237: Fix unbreakable flint and steel is completely consumed while igniting creeper e37e29ce0 Increase outdated build delay c00438b39 SPIGOT-7530, PR-1313: Add Player#removeResourcePack 492dd80ce SPIGOT-7527, PR-1310: Add WindCharge#explode() e11fbb9d7 Upgrade MySQL driver 9f3a0bd2a Attempt upgrade of resolver libraries 60d16d7ca PR-1306: Centralize Bukkit and Minecraft entity conversion Spigot Changes: 06d602e7 Rebuild patches
70 lines
3.6 KiB
Diff
70 lines
3.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Mon, 6 Jul 2020 18:36:41 -0400
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Subject: [PATCH] Fix Concurrency issue in ShufflingList
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if multiple threads from worldgen sort at same time, it will crash.
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So make a copy of the list for sorting purposes.
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diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/GateBehavior.java b/src/main/java/net/minecraft/world/entity/ai/behavior/GateBehavior.java
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index 419eadbe31b86b7192fd7a63268d547705e7c7ce..b45c4f50705f80163d44d9e588f86a5770f5be38 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/behavior/GateBehavior.java
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+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/GateBehavior.java
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@@ -17,7 +17,7 @@ public class GateBehavior<E extends LivingEntity> implements BehaviorControl<E>
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private final Set<MemoryModuleType<?>> exitErasedMemories;
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private final GateBehavior.OrderPolicy orderPolicy;
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private final GateBehavior.RunningPolicy runningPolicy;
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- private final ShufflingList<BehaviorControl<? super E>> behaviors = new ShufflingList<>();
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+ private final ShufflingList<BehaviorControl<? super E>> behaviors = new ShufflingList<>(false); // Paper - don't use a clone
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private Behavior.Status status = Behavior.Status.STOPPED;
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public GateBehavior(Map<MemoryModuleType<?>, MemoryStatus> requiredMemoryState, Set<MemoryModuleType<?>> memoriesToForgetWhenStopped, GateBehavior.OrderPolicy order, GateBehavior.RunningPolicy runMode, List<Pair<? extends BehaviorControl<? super E>, Integer>> tasks) {
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diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java b/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java
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index 9fb20cd00568aeea25284ea0e80fe52cb1c3eede..731ef21dbbd25d6924717de42f4569a9b5935643 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java
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+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/ShufflingList.java
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@@ -16,12 +16,25 @@ import net.minecraft.util.RandomSource;
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public class ShufflingList<U> implements Iterable<U> {
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protected final List<ShufflingList.WeightedEntry<U>> entries;
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private final RandomSource random = RandomSource.create();
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+ private final boolean isUnsafe; // Paper
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public ShufflingList() {
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+ // Paper start
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+ this(true);
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+ }
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+ public ShufflingList(boolean isUnsafe) {
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+ this.isUnsafe = isUnsafe;
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+ // Paper end
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this.entries = Lists.newArrayList();
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}
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private ShufflingList(List<ShufflingList.WeightedEntry<U>> list) {
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+ // Paper start
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+ this(list, true);
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+ }
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+ private ShufflingList(List<ShufflingList.WeightedEntry<U>> list, boolean isUnsafe) {
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+ this.isUnsafe = isUnsafe;
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+ // Paper end
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this.entries = Lists.newArrayList(list);
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}
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@@ -37,11 +50,12 @@ public class ShufflingList<U> implements Iterable<U> {
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}
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public ShufflingList<U> shuffle() {
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- this.entries.forEach((entry) -> {
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- entry.setRandom(this.random.nextFloat());
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- });
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- this.entries.sort(Comparator.comparingDouble(ShufflingList.WeightedEntry::getRandWeight));
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- return this;
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+ // Paper start - make concurrent safe, work off a clone of the list
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+ List<ShufflingList.WeightedEntry<U>> list = this.isUnsafe ? Lists.newArrayList(this.entries) : this.entries;
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+ list.forEach(entry -> entry.setRandom(this.random.nextFloat()));
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+ list.sort(Comparator.comparingDouble(ShufflingList.WeightedEntry::getRandWeight));
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+ return this.isUnsafe ? new ShufflingList<>(list, this.isUnsafe) : this;
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+ // Paper end
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}
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public Stream<U> stream() {
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