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https://github.com/PaperMC/Paper.git
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88 lines
4.1 KiB
Diff
88 lines
4.1 KiB
Diff
From c2f6872c419c0bab2865724c87b1badc9ee59ef5 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Fri, 3 Aug 2018 22:47:46 -0400
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Subject: [PATCH] Entity add to world fixes
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1) Chunk Registration might kill an entity, don't add it to the world if it did!
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2) By default, entities are added to the world per slice iteration.
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This opens risk of the slices being manipulated during chunk add if an
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EntityAddToWorldEvent spawns an entity into this chunk.
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Fix this by differing entity add to world for all entities at the same time
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3) If a duplicate entity is attempted to add to the world of an entity, and
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the original entity is dead, overwrite it as the logic does for unloaod queued entities.
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diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
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index bd31a7dcab..8b80830933 100644
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--- a/src/main/java/net/minecraft/server/Chunk.java
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+++ b/src/main/java/net/minecraft/server/Chunk.java
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@@ -901,6 +901,7 @@ public class Chunk implements IChunkAccess {
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this.world.b(this.tileEntities.values());
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List[] aentityslice = this.entitySlices; // Spigot
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int i = aentityslice.length;
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+ List<Entity> toAdd = new java.util.ArrayList<>(32); // Paper
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for (int j = 0; j < i; ++j) {
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List entityslice = aentityslice[j]; // Spigot
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@@ -948,10 +949,12 @@ public class Chunk implements IChunkAccess {
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thisChunk.put(entity.uniqueID, entity);
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}
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}
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- // Paper end
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- this.world.a((Collection) entityslice);
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+ //this.world.a((Collection) entityslice); // Move down, add all entities at same time
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+ toAdd.addAll(entityslice);
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+ // Paper end
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}
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+ this.world.addChunkEntities(toAdd); // Paper - add all at same time to avoid entities adding to world modifying slice state
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// CraftBukkit start
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org.bukkit.Server server = this.world.getServer();
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diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
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index b0053e5e63..004c3ec474 100644
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--- a/src/main/java/net/minecraft/server/World.java
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+++ b/src/main/java/net/minecraft/server/World.java
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@@ -1069,6 +1069,7 @@ public abstract class World implements GeneratorAccess, IIBlockAccess, AutoClose
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}
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this.getChunkAt(i, j).a(entity);
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+ if (entity.dead) return false; // Paper - don't add dead entities, chunk registration may of killed it
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this.entityList.add(entity);
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this.b(entity);
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return true;
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@@ -2463,6 +2464,7 @@ public abstract class World implements GeneratorAccess, IIBlockAccess, AutoClose
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return i;
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}
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+ public void addChunkEntities(Collection<Entity> collection) { a(collection); } // Paper - OBFHELPER
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public void a(Collection<Entity> collection) {
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org.spigotmc.AsyncCatcher.catchOp( "entity world add"); // Spigot
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// CraftBukkit start
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@@ -2472,7 +2474,7 @@ public abstract class World implements GeneratorAccess, IIBlockAccess, AutoClose
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while (iterator.hasNext()) {
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Entity entity = (Entity) iterator.next();
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- if (entity == null) {
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+ if (entity == null || entity.dead || entity.valid) { // Paper - prevent adding already added or dead entities
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continue;
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}
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this.entityList.add(entity);
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diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
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index 6b5b2c8258..f5911fbf08 100644
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--- a/src/main/java/net/minecraft/server/WorldServer.java
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+++ b/src/main/java/net/minecraft/server/WorldServer.java
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@@ -992,7 +992,7 @@ public class WorldServer extends World implements IAsyncTaskHandler {
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if (this.entitiesByUUID.containsKey(uuid)) {
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Entity entity1 = (Entity) this.entitiesByUUID.get(uuid);
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- if (this.g.contains(entity1)) {
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+ if (this.g.contains(entity1) || entity1.dead) { // Paper - if dupe is dead, overwrite
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this.g.remove(entity1);
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} else {
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if (!(entity instanceof EntityHuman)) {
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--
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2.18.0
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