Paper/Spigot-Server-Patches/0330-Entity-add-to-world-fixes.patch
Aikar 05466e3b47
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Bukkit Changes:
d2834556 SPIGOT-4219: Event for PigZombies angering.

CraftBukkit Changes:
a9c796f1 SPIGOT-4184: Fix furnaces not matching Vanilla smelt or animations
195f071e SPIGOT-4219: Event for PigZombies angering.
5e3082c7 SPIGOT-4230: Improve legacy block types
2018-08-05 19:46:43 -04:00

88 lines
4.1 KiB
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From 65f1544c78789ea0348d7059d8d6f82f130155e4 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 3 Aug 2018 22:47:46 -0400
Subject: [PATCH] Entity add to world fixes
1) Chunk Registration might kill an entity, don't add it to the world if it did!
2) By default, entities are added to the world per slice iteration.
This opens risk of the slices being manipulated during chunk add if an
EntityAddToWorldEvent spawns an entity into this chunk.
Fix this by differing entity add to world for all entities at the same time
3) If a duplicate entity is attempted to add to the world of an entity, and
the original entity is dead, overwrite it as the logic does for unloaod queued entities.
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index e510940ab3..db8fbc006d 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -902,6 +902,7 @@ public class Chunk implements IChunkAccess {
this.world.b(this.tileEntities.values());
List[] aentityslice = this.entitySlices; // Spigot
int i = aentityslice.length;
+ List<Entity> toAdd = new java.util.ArrayList<>(32); // Paper
for (int j = 0; j < i; ++j) {
List entityslice = aentityslice[j]; // Spigot
@@ -948,10 +949,12 @@ public class Chunk implements IChunkAccess {
thisChunk.put(entity.uniqueID, entity);
}
}
- // Paper end
- this.world.a((Collection) entityslice);
+ //this.world.a((Collection) entityslice); // Move down, add all entities at same time
+ toAdd.addAll(entityslice);
+ // Paper end
}
+ this.world.addChunkEntities(toAdd); // Paper - add all at same time to avoid entities adding to world modifying slice state
// CraftBukkit start
org.bukkit.Server server = this.world.getServer();
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index b0053e5e63..004c3ec474 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -1069,6 +1069,7 @@ public abstract class World implements GeneratorAccess, IIBlockAccess, AutoClose
}
this.getChunkAt(i, j).a(entity);
+ if (entity.dead) return false; // Paper - don't add dead entities, chunk registration may of killed it
this.entityList.add(entity);
this.b(entity);
return true;
@@ -2463,6 +2464,7 @@ public abstract class World implements GeneratorAccess, IIBlockAccess, AutoClose
return i;
}
+ public void addChunkEntities(Collection<Entity> collection) { a(collection); } // Paper - OBFHELPER
public void a(Collection<Entity> collection) {
org.spigotmc.AsyncCatcher.catchOp( "entity world add"); // Spigot
// CraftBukkit start
@@ -2472,7 +2474,7 @@ public abstract class World implements GeneratorAccess, IIBlockAccess, AutoClose
while (iterator.hasNext()) {
Entity entity = (Entity) iterator.next();
- if (entity == null) {
+ if (entity == null || entity.dead || entity.valid) { // Paper - prevent adding already added or dead entities
continue;
}
this.entityList.add(entity);
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 7a9f28421b..6412715b78 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -992,7 +992,7 @@ public class WorldServer extends World implements IAsyncTaskHandler {
if (this.entitiesByUUID.containsKey(uuid)) {
Entity entity1 = (Entity) this.entitiesByUUID.get(uuid);
- if (this.g.contains(entity1)) {
+ if (this.g.contains(entity1) || entity1.dead) { // Paper - if dupe is dead, overwrite
this.g.remove(entity1);
} else {
if (!(entity instanceof EntityHuman)) {
--
2.18.0