Paper/CraftBukkit-Patches/0066-Guard-entity-list.patch

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From 284f5650477cb3ccaedd228fbaa6439e8a8e8bd9 Mon Sep 17 00:00:00 2001
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From: Ammar Askar <ammar@ammaraskar.com>
Date: Sat, 3 Aug 2013 21:42:00 +0500
Subject: [PATCH] Guard entity list
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index ba1c1ca..c03e274 100644
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--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
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@@ -29,7 +29,25 @@ import org.bukkit.event.weather.ThunderChangeEvent;
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public abstract class World implements IBlockAccess {
public boolean d;
- public List entityList = new ArrayList();
+ public List entityList = new ArrayList() { // Spigot start - guard entity list from removals
+ @Override
+ public Object remove(int index) {
+ guard();
+ return super.remove(index);
+ }
+
+ @Override
+ public boolean remove(Object o) {
+ guard();
+ return super.remove(o);
+ }
+
+ private void guard() {
+ if (guardEntityList) {
+ throw new java.util.ConcurrentModificationException();
+ }
+ }
+ }; // Spigot end
protected List f = new ArrayList();
public Set tileEntityList = new HashSet(); // CraftBukkit - ArrayList -> HashSet
private List a = new ArrayList();
@@ -74,6 +92,7 @@ public abstract class World implements IBlockAccess {
int[] H;
public boolean isStatic;
// Spigot start
+ private boolean guardEntityList = false;
protected final gnu.trove.map.hash.TLongShortHashMap chunkTickList;
protected float growthOdds = 100;
protected float modifiedOdds = 100;
@@ -1285,6 +1304,7 @@ public abstract class World implements IBlockAccess {
org.spigotmc.ActivationRange.activateEntities(this); // Spigot
timings.entityTick.startTiming(); // Spigot
+ guardEntityList = true; // Spigot
for (i = 0; i < this.entityList.size(); ++i) {
entity = (Entity) this.entityList.get(i);
@@ -1332,12 +1352,15 @@ public abstract class World implements IBlockAccess {
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this.getChunkAt(j, k).b(entity);
}
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+ guardEntityList = false; // Spigot
this.entityList.remove(i--);
+ guardEntityList = true; // Spigot
this.b(entity);
}
this.methodProfiler.b();
}
+ guardEntityList = false; // Spigot
timings.entityTick.stopTiming(); // Spigot
this.methodProfiler.c("tileEntities");
--
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1.8.1.2
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