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-rw-r--r--patches/unapplied/server/0716-Warn-on-plugins-accessing-faraway-chunks.patch105
1 files changed, 105 insertions, 0 deletions
diff --git a/patches/unapplied/server/0716-Warn-on-plugins-accessing-faraway-chunks.patch b/patches/unapplied/server/0716-Warn-on-plugins-accessing-faraway-chunks.patch
new file mode 100644
index 0000000000..990dd560c1
--- /dev/null
+++ b/patches/unapplied/server/0716-Warn-on-plugins-accessing-faraway-chunks.patch
@@ -0,0 +1,105 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Owen1212055 <[email protected]>
+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 9afc0eaaca5ab7b6445d90ce53e31a6ae76f8848..f0c2187a92de633a1d4cc7e71ff62cbe30ce8774 100644
+--- a/src/main/java/net/minecraft/world/level/Level.java
++++ b/src/main/java/net/minecraft/world/level/Level.java
+@@ -337,7 +337,7 @@ 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 33735897ec3800754ba690ca215d3d11d746f728..b0e57ca463a3c7cb1be8920a899c9afc7c871f4b 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,