01a13871de
Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
97 Zeilen
5.3 KiB
Diff
97 Zeilen
5.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
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Date: Fri, 29 Jul 2022 12:35:19 -0400
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Subject: [PATCH] Warn on plugins accessing faraway chunks
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diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
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index 01cbff44c8b53458362cf849910cdff0a6da27e2..d89471935b2b5888cb5d1f6829ae479003451fda 100644
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--- a/src/main/java/net/minecraft/world/level/Level.java
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+++ b/src/main/java/net/minecraft/world/level/Level.java
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@@ -417,7 +417,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
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}
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private static boolean isInWorldBoundsHorizontal(BlockPos pos) {
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- return pos.getX() >= -30000000 && pos.getZ() >= -30000000 && pos.getX() < 30000000 && pos.getZ() < 30000000;
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+ return pos.getX() >= -30000000 && pos.getZ() >= -30000000 && pos.getX() < 30000000 && pos.getZ() < 30000000; // Dif on change
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}
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private static boolean isOutsideSpawnableHeight(int y) {
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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index 53f780bb47979e728e0212f8159bf9d440ea32b0..72ed25022d5ea1074304be3c72b23882b8f0f88a 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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@@ -313,9 +313,24 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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public boolean setSpawnLocation(int x, int y, int z) {
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return this.setSpawnLocation(x, y, z, 0.0F);
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}
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+ // Paper start
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+ private static void warnUnsafeChunk(String reason, int x, int z) {
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+ // if any chunk coord is outside of 30 million blocks
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+ if (x > 1875000 || z > 1875000 || x < -1875000 || z < -1875000) {
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+ Plugin plugin = io.papermc.paper.util.StackWalkerUtil.getFirstPluginCaller();
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+ if (plugin != null) {
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+ plugin.getLogger().warning("Plugin is %s at (%s, %s), this might cause issues.".formatted(reason, x, z));
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+ }
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+ if (net.minecraft.server.MinecraftServer.getServer().isDebugging()) {
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+ io.papermc.paper.util.TraceUtil.dumpTraceForThread("Dangerous chunk retrieval");
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+ }
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+ }
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+ }
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+ // Paper end
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@Override
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public Chunk getChunkAt(int x, int z) {
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+ warnUnsafeChunk("getting a faraway chunk", x, z); // Paper
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// Paper start - add ticket to hold chunk for a little while longer if plugin accesses it
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net.minecraft.world.level.chunk.LevelChunk chunk = world.getChunkSource().getChunkAtIfLoadedImmediately(x, z);
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if (chunk == null) {
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@@ -420,6 +435,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public boolean regenerateChunk(int x, int z) {
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org.spigotmc.AsyncCatcher.catchOp("chunk regenerate"); // Spigot
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+ warnUnsafeChunk("regenerating a faraway chunk", x, z); // Paper
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// Paper start - implement regenerateChunk method
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final ServerLevel serverLevel = this.world;
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final net.minecraft.server.level.ServerChunkCache serverChunkCache = serverLevel.getChunkSource();
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@@ -516,6 +532,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public boolean loadChunk(int x, int z, boolean generate) {
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org.spigotmc.AsyncCatcher.catchOp("chunk load"); // Spigot
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+ warnUnsafeChunk("loading a faraway chunk", x, z); // Paper
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// Paper start - Optimize this method
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ChunkPos chunkPos = new ChunkPos(x, z);
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ChunkAccess immediate = world.getChunkSource().getChunkAtIfLoadedImmediately(x, z); // Paper
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@@ -580,6 +597,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public boolean addPluginChunkTicket(int x, int z, Plugin plugin) {
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+ warnUnsafeChunk("adding a faraway chunk ticket", x, z); // Paper
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Preconditions.checkArgument(plugin != null, "null plugin");
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Preconditions.checkArgument(plugin.isEnabled(), "plugin is not enabled");
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@@ -648,6 +666,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public void setChunkForceLoaded(int x, int z, boolean forced) {
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+ warnUnsafeChunk("forceloading a faraway chunk", x, z); // Paper
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this.getHandle().setChunkForced(x, z, forced);
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}
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@@ -959,6 +978,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public int getHighestBlockYAt(int x, int z, org.bukkit.HeightMap heightMap) {
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+ warnUnsafeChunk("getting a faraway chunk", x >> 4, z >> 4); // Paper
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// Transient load for this tick
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return this.world.getChunk(x >> 4, z >> 4).getHeight(CraftHeightMap.toNMS(heightMap), x, z);
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}
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@@ -2315,6 +2335,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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// Spigot end
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// Paper start
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public java.util.concurrent.CompletableFuture<Chunk> getChunkAtAsync(int x, int z, boolean gen, boolean urgent) {
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+ warnUnsafeChunk("getting a faraway chunk async", x, z); // Paper
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if (Bukkit.isPrimaryThread()) {
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net.minecraft.world.level.chunk.LevelChunk immediate = this.world.getChunkSource().getChunkAtIfLoadedImmediately(x, z);
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if (immediate != null) {
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