From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Cryptite <cryptite@gmail.com>
Date: Sat, 2 Apr 2022 17:38:32 -0500
Subject: [PATCH] Debug sync chunk loads


diff --git a/src/main/java/com/destroystokyo/paper/PaperCommand.java b/src/main/java/com/destroystokyo/paper/PaperCommand.java
index d0c55497040158d959693ef2ddf3ff03bd6df05f..5925feafad214333529bace2178f233f589e1a6e 100644
--- a/src/main/java/com/destroystokyo/paper/PaperCommand.java
+++ b/src/main/java/com/destroystokyo/paper/PaperCommand.java
@@ -70,7 +70,7 @@ import java.util.stream.Collectors;
 
 public class PaperCommand extends Command {
     private static final String BASE_PERM = "bukkit.command.paper.";
-    private static final ImmutableSet<String> SUBCOMMANDS = ImmutableSet.<String>builder().add("heap", "entity", "reload", "version", "debug", "chunkinfo", "fixlight", "syncloadinfo", "dumpitem", "mobcaps", "playermobcaps").build();
+    private static final ImmutableSet<String> SUBCOMMANDS = ImmutableSet.<String>builder().add("heap", "entity", "reload", "version", "debug", "chunkinfo", "fixlight", "syncloadinfo", "dumpitem", "mobcaps", "playermobcaps", "debugsyncload").build(); // Slice
 
     public PaperCommand(String name) {
         super(name);
@@ -203,6 +203,12 @@ public class PaperCommand extends Command {
             case "syncloadinfo":
                 this.doSyncLoadInfo(sender, args);
                 break;
+            // Slice start
+            case "debugsyncload":
+                SyncLoadFinder.DEBUG = !SyncLoadFinder.DEBUG;
+                MinecraftServer.LOGGER.info("Debugging sync chunk loads now " + (SyncLoadFinder.DEBUG ? "ON" : "OFF"));
+                break;
+            // Slice end
             case "mobcaps":
                 this.printMobcaps(sender, args);
                 break;
diff --git a/src/main/java/com/destroystokyo/paper/io/SyncLoadFinder.java b/src/main/java/com/destroystokyo/paper/io/SyncLoadFinder.java
index d3e619655382e50e9ac9323ed942502d85c9599c..ff222a54a320eee467383a612f2ce17614b0fe2a 100644
--- a/src/main/java/com/destroystokyo/paper/io/SyncLoadFinder.java
+++ b/src/main/java/com/destroystokyo/paper/io/SyncLoadFinder.java
@@ -17,6 +17,8 @@ public class SyncLoadFinder {
 
     public static final boolean ENABLED = Boolean.getBoolean("paper.debug-sync-loads");
 
+    public static boolean DEBUG; // Slice
+
     private static final WeakHashMap<Level, Object2ObjectOpenHashMap<ThrowableWithEquals, SyncLoadInformation>> SYNC_LOADS = new WeakHashMap<>();
 
     private static final class SyncLoadInformation {
@@ -37,6 +39,13 @@ public class SyncLoadFinder {
 
         final ThrowableWithEquals stacktrace = new ThrowableWithEquals(Thread.currentThread().getStackTrace());
 
+        // Slice start
+        if (DEBUG) {
+            org.bukkit.Bukkit.getServer().getLogger().log(java.util.logging.Level.WARNING, "Sync chunk load at " + world.getWorld().getName() + " (" + chunkX + "," + chunkZ + ")");
+            Thread.dumpStack();
+        }
+        // Slice end
+
         SYNC_LOADS.compute(world, (final Level keyInMap, Object2ObjectOpenHashMap<ThrowableWithEquals, SyncLoadInformation> map) -> {
             if (map == null) {
                 map = new Object2ObjectOpenHashMap<>();