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PaperMC/patches/server/0714-Warn-on-plugins-accessing-faraway-chunks.patch
2024-12-03 20:46:25 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
Date: Fri, 29 Jul 2022 12:35:19 -0400
Subject: [PATCH] Warn on plugins accessing faraway chunks
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index a1731f09e724794be90dbf47e1d463a10cdb3052..447e4c77b5cd90e744e014b66af5f0a9ebe9c2d8 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -338,7 +338,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
}
private static boolean isInWorldBoundsHorizontal(BlockPos pos) {
- return pos.getX() >= -30000000 && pos.getZ() >= -30000000 && pos.getX() < 30000000 && pos.getZ() < 30000000;
+ return pos.getX() >= -30000000 && pos.getZ() >= -30000000 && pos.getX() < 30000000 && pos.getZ() < 30000000; // Diff on change warnUnsafeChunk()
}
private static boolean isOutsideSpawnableHeight(int y) {
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 827cf8b2e241e49dac961b103f32546a04f8a2f9..5379931b2403566f54e4ecf0699229d636d2d38f 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -302,9 +302,24 @@ public class CraftWorld extends CraftRegionAccessor implements World {
public boolean setSpawnLocation(int x, int y, int z) {
return this.setSpawnLocation(x, y, z, 0.0F);
}
+ // Paper start
+ private static void warnUnsafeChunk(String reason, int x, int z) {
+ // if any chunk coord is outside of 30 million blocks
+ if (x > 1875000 || z > 1875000 || x < -1875000 || z < -1875000) {
+ Plugin plugin = io.papermc.paper.util.StackWalkerUtil.getFirstPluginCaller();
+ if (plugin != null) {
+ plugin.getLogger().warning("Plugin is %s at (%s, %s), this might cause issues.".formatted(reason, x, z));
+ }
+ if (net.minecraft.server.MinecraftServer.getServer().isDebugging()) {
+ io.papermc.paper.util.TraceUtil.dumpTraceForThread("Dangerous chunk retrieval");
+ }
+ }
+ }
+ // Paper end
@Override
public Chunk getChunkAt(int x, int z) {
+ warnUnsafeChunk("getting a faraway chunk", x, z); // Paper
net.minecraft.world.level.chunk.LevelChunk chunk = (net.minecraft.world.level.chunk.LevelChunk) this.world.getChunk(x, z, ChunkStatus.FULL, true);
return new CraftChunk(chunk);
}
@@ -400,6 +415,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
if (!unloadChunk0(x, z, false)) {
return false;
}
+ warnUnsafeChunk("regenerating a faraway chunk", x, z); // Paper
final long chunkKey = ChunkCoordIntPair.pair(x, z);
world.getChunkProvider().unloadQueue.remove(chunkKey);
@@ -473,6 +489,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public boolean loadChunk(int x, int z, boolean generate) {
org.spigotmc.AsyncCatcher.catchOp("chunk load"); // Spigot
+ warnUnsafeChunk("loading a faraway chunk", x, z); // Paper
ChunkAccess chunk = this.world.getChunkSource().getChunk(x, z, generate || isChunkGenerated(x, z) ? ChunkStatus.FULL : ChunkStatus.EMPTY, true); // Paper
// If generate = false, but the chunk already exists, we will get this back.
@@ -505,6 +522,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public boolean addPluginChunkTicket(int x, int z, Plugin plugin) {
+ warnUnsafeChunk("adding a faraway chunk ticket", x, z); // Paper
Preconditions.checkArgument(plugin != null, "null plugin");
Preconditions.checkArgument(plugin.isEnabled(), "plugin is not enabled");
@@ -605,6 +623,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public void setChunkForceLoaded(int x, int z, boolean forced) {
+ warnUnsafeChunk("forceloading a faraway chunk", x, z); // Paper
this.getHandle().setChunkForced(x, z, forced);
}
@@ -939,6 +958,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public int getHighestBlockYAt(int x, int z, org.bukkit.HeightMap heightMap) {
+ warnUnsafeChunk("getting a faraway chunk", x >> 4, z >> 4); // Paper
// Transient load for this tick
return this.world.getChunk(x >> 4, z >> 4).getHeight(CraftHeightMap.toNMS(heightMap), x, z);
}
@@ -2344,6 +2364,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
// Paper start
@Override
public void getChunkAtAsync(int x, int z, boolean gen, boolean urgent, @NotNull Consumer<? super Chunk> cb) {
+ warnUnsafeChunk("getting a faraway chunk async", x, z); // Paper
ca.spottedleaf.moonrise.common.util.ChunkSystem.scheduleChunkLoad(
this.getHandle(), x, z, gen, ChunkStatus.FULL, true,
urgent ? ca.spottedleaf.concurrentutil.util.Priority.HIGHER : ca.spottedleaf.concurrentutil.util.Priority.NORMAL,
@@ -2356,6 +2377,8 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public void getChunksAtAsync(int minX, int minZ, int maxX, int maxZ, boolean urgent, Runnable cb) {
+ warnUnsafeChunk("getting a faraway chunk async", minX, minZ); // Paper
+ warnUnsafeChunk("getting a faraway chunk async", maxX, maxZ); // Paper
this.getHandle().loadChunks(
minX, minZ, maxX, maxZ,
urgent ? ca.spottedleaf.concurrentutil.util.Priority.HIGHER : ca.spottedleaf.concurrentutil.util.Priority.NORMAL,