PaperMC/patches/server/0044-Ensure-commands-are-not-ran-async.patch
Jason Penilla 0fa2a949ae
Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
8503c3c9 #621: Add HumanEntity#getItemInUse and Material#getSlipperiness
248deb09 #622: Add methods to check if item is the breed item for an entity
2ce691d8 Clarify Player#breakBlock only works for blocks in the same world
5dcdd48e SPIGOT-6514: Small Dripleaf block data is missing half property
cc9610b7 #619: Add Player#breakBlock()
862bc475 Fix bad merge of SPIGOT-6502 fix
989bb0c1 Downgrade SnakeYAML due to issues with comments parsing
1dff62ae Fix inverted visual fire docs

CraftBukkit Changes:
40caacc8 SPIGOT-6526: World entities are not populated when plugin onEnable is called
c9a92ad0 SPIGOT-6536: Marker position not set on spawn
20d3e57c #855: Add HumanEntity#getItemInUse and Material#getSlipperiness
d9c69b44 SPIGOT-6529: Fix BundleMeta#setItems
8bd43be5 SPIGOT-6535: PlayerGameModeChangeEvent event incorrectly reports old gamemode
4ece3ff3 #856: Add methods to check if item is the breed item for an entity
dd4bec5f Add additional validation to Player#breakBlock
bc835ae6 SPIGOT-6532: Fix Entity#setGlowing
384e116e Restore 1.16.5 behaviour of InventoryDragEvent being called even when a single item is 'dragged' to its own slot
b42e708c Fix new map colors rendering as transparent
cfe7fecf SPIGOT-6524: Inventory desync when InventoryClickEvent is cancelled
eeae1b19 SPIGOT-6522: ItemStack on cursor is always AIR
7490724d Fix missing PlayerEditBookEvent
06875f76 SPIGOT-6513: Placing ItemStack in Inventory causes InventoryAction.NOTHING
27835bde SPIGOT-6519: Fix end gateway teleports
4ac634ad SPIGOT-6515: "Un-waterlogging" throws UnsupportedOperationException in some cases
da425fa2 SPIGOT-6518: Anvils falling onto dripstone can sometimes crash server
50530da9 SPIGOT-6514: Small Dripleaf block data is missing half property
6fdecf20 #853: Implement Player#breakBlock()
4db9c49f SPIGOT-6510: Bukkit#createMap throws NullPointerException
89e2b127 SPIGOT-6517: Spider jockey crash on dripstone
cbf2f678 SPIGOT-6508: Rename conflicted getServer
74575d48 SPIGOT-6506: Fix crash with custom inventories
a3df386f Fix NPE with Entity.getNearbyEntities
d747f8ed Fix NPE with World.getNearbyEntities
4d2c7800 Fix second usage of worldGenSettings just in case
5182f923 SPIGOT-6504: Fix generating fresh worlds

Spigot Changes:
66f9d3c1 Rebuild patches
191e4971 Rebuild patches
a09c0bb6 Restore Spigot experience merging
2021-06-12 22:13:07 -07:00

118 lines
6.4 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 3 Mar 2016 01:17:12 -0600
Subject: [PATCH] Ensure commands are not ran async
Plugins calling Player.chat("/foo") or Server.dispatchCommand() could
trigger the server to execute a command while on another thread.
These commands would then process EXPECTING to be on the main thread, leaving to
very hard to trace concurrency issues.
This change will synchronize the command execution back to the main thread, causing a
big slowdown in execution but throwing an exception at same time to raise awareness
that it is happening so that plugin authors can fix their code to stop executing commands async.
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index c58f8cf20822439098648265917801509dda1a72..a6d1ce8fd971e8de720e01eaba4ee6c5872c39db 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -1859,6 +1859,29 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
}
if (!async && s.startsWith("/")) {
+ // Paper Start
+ if (!org.spigotmc.AsyncCatcher.shuttingDown && !org.bukkit.Bukkit.isPrimaryThread()) {
+ final String fCommandLine = s;
+ MinecraftServer.LOGGER.log(org.apache.logging.log4j.Level.ERROR, "Command Dispatched Async: " + fCommandLine);
+ MinecraftServer.LOGGER.log(org.apache.logging.log4j.Level.ERROR, "Please notify author of plugin causing this execution to fix this bug! see: http://bit.ly/1oSiM6C", new Throwable());
+ Waitable wait = new Waitable() {
+ @Override
+ protected Object evaluate() {
+ chat(fCommandLine, false);
+ return null;
+ }
+ };
+ server.processQueue.add(wait);
+ try {
+ wait.get();
+ return;
+ } catch (InterruptedException e) {
+ Thread.currentThread().interrupt(); // This is proper habit for java. If we aren't handling it, pass it on!
+ } catch (Exception e) {
+ throw new RuntimeException("Exception processing chat command", e.getCause());
+ }
+ }
+ // Paper End
this.handleCommand(s);
} else if (this.player.getChatVisibility() == ChatVisiblity.SYSTEM) {
// Do nothing, this is coming from a plugin
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 4612557dfe8c81e6a9b6f11dc1c8d40eaa1337ec..452904333ce232855d61ff7d12cb8a5595ebb3f8 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -762,6 +762,28 @@ public final class CraftServer implements Server {
Validate.notNull(commandLine, "CommandLine cannot be null");
org.spigotmc.AsyncCatcher.catchOp("command dispatch"); // Spigot
+ // Paper Start
+ if (!org.spigotmc.AsyncCatcher.shuttingDown && !Bukkit.isPrimaryThread()) {
+ final CommandSender fSender = sender;
+ final String fCommandLine = commandLine;
+ Bukkit.getLogger().log(Level.SEVERE, "Command Dispatched Async: " + commandLine);
+ Bukkit.getLogger().log(Level.SEVERE, "Please notify author of plugin causing this execution to fix this bug! see: http://bit.ly/1oSiM6C", new Throwable());
+ org.bukkit.craftbukkit.util.Waitable<Boolean> wait = new org.bukkit.craftbukkit.util.Waitable<Boolean>() {
+ @Override
+ protected Boolean evaluate() {
+ return dispatchCommand(fSender, fCommandLine);
+ }
+ };
+ net.minecraft.server.MinecraftServer.getServer().processQueue.add(wait);
+ try {
+ return wait.get();
+ } catch (InterruptedException e) {
+ Thread.currentThread().interrupt(); // This is proper habit for java. If we aren't handling it, pass it on!
+ } catch (Exception e) {
+ throw new RuntimeException("Exception processing dispatch command", e.getCause());
+ }
+ }
+ // Paper End
if (this.commandMap.dispatch(sender, commandLine)) {
return true;
}
diff --git a/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java b/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java
index 19c44daaa407b7c1c7a7ffe56fef8c8814c6d5b2..6a073a9dc44d93eba296a0e18a9c7be8a7881725 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java
@@ -13,6 +13,7 @@ public class ServerShutdownThread extends Thread {
public void run() {
try {
org.spigotmc.AsyncCatcher.enabled = false; // Spigot
+ org.spigotmc.AsyncCatcher.shuttingDown = true; // Paper
this.server.close();
} finally {
try {
diff --git a/src/main/java/org/spigotmc/AsyncCatcher.java b/src/main/java/org/spigotmc/AsyncCatcher.java
index bbf0d9d9c44fe8d7add2f978994ec129420814c7..7a23b56752f6733ee626a8b1e4c3b78591855c4e 100644
--- a/src/main/java/org/spigotmc/AsyncCatcher.java
+++ b/src/main/java/org/spigotmc/AsyncCatcher.java
@@ -6,6 +6,7 @@ public class AsyncCatcher
{
public static boolean enabled = true;
+ public static boolean shuttingDown = false; // Paper
public static void catchOp(String reason)
{
diff --git a/src/main/java/org/spigotmc/RestartCommand.java b/src/main/java/org/spigotmc/RestartCommand.java
index 882e93ad4471e3688f2fcfb1e6f16926786ee5e7..94d8ba376cd1f024b244654cac9bb62bb19e3060 100644
--- a/src/main/java/org/spigotmc/RestartCommand.java
+++ b/src/main/java/org/spigotmc/RestartCommand.java
@@ -43,6 +43,7 @@ public class RestartCommand extends Command
private static void restart(final String restartScript)
{
AsyncCatcher.enabled = false; // Disable async catcher incase it interferes with us
+ org.spigotmc.AsyncCatcher.shuttingDown = true; // Paper
try
{
String[] split = restartScript.split( " " );