Paper/Spigot-Server-Patches/0044-Ensure-commands-are-not-ran-async.patch
Shane Freeder b68b282439
Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Warning: this commit contains more mapping changes from upstream, As always, ensure that you
have working backups and test this build before deployment; Developers working on paper will,
yet again, need to delete their work/Minecraft/1.13.2 folder

Bukkit Changes:
7fca5fd4 SPIGOT-4558: Preserve user order in the face of copied defaults in configurations
15c9b1eb Ignore spurious slot IDs sent by client, e.g. in enchanting tables
5d2a10c5 SPIGOT-3747: Add API for force loaded chunks
d6dd2bb3 SPIGOT-3538: Add getHitBlockFace for ProjectileHitEvent
771db4aa SPIGOT-794: Call EntityPlaceEvent for Minecart placement
55462509 Add InventoryView#getSlotType
2f3ce5b6 Remove EntityTransformEvent and CustomItemTagContainer from draft API
f04ad7b6 Make ProjectileLaunchEvent extend EntitySpawnEvent
ccb85808 Define EntitySpawnEvent
b8cc3ebe Add PlayerItemDamageEvent
184a495d Ease ClassLoader Deadlocks Where Possible
11ac4728 Expand Boolean Prompt Values in Conversation API
aae62d51 Added getAllSessionData() to the Conversation API.
9290ff91 Add InventoryView#getInventory API
995e530f Add API to get / set base arrow damage

CraftBukkit Changes:
c4a67eed SPIGOT-4556: Fix plugins closing inventory during drop events
5be2ddcb Replace version constants with methods to prevent compiler inlining
a5b9c7b3 Use API method to create offset command completions
2bc7d1df SPIGOT-3747: Add API for force loaded chunks
a408f375 SPIGOT-3538: Add getHitBlockFace for ProjectileHitEvent
b54b9409 SPIGOT-2864: Make Arrow / Item setTicksLived behave like FallingBlock
79ded7a8 SPIGOT-1811: Death message not shown on respawn screen
b4a4f15d SPIGOT-943: InventoryCloseEvent called on death regardless of open inventory
0afed592 SPIGOT-794: Call EntityPlaceEvent for Minecart placement
2b2d084a Add InventoryView#getSlotType
01a9959a Do not use deprecated ItemSpawnEvent constructor
9642498d SPIGOT-4547: Call EntitySpawnEvent as general spawn fallback event
963f4a5f Add PlayerItemDamageEvent
63db0445 Add API to get / set base arrow damage
531c25d7 Add CraftMagicNumbers.MAPPINGS_VERSION for use by NMS plugins
d05c8b14 Mappings Update
bd36e200 SPIGOT-4551: Ignore invalid attribute modifier slots

Spigot Changes:
518206a1 Remove redundant trove depend
1959ad21 MC-11211,SPIGOT-4552: Fix placing double slabs at y = 255
29ab5e43 SPIGOT-3661: Allow arguments in restart-script
7cc46316 SPIGOT-852: Growth modifiers for beetroots, potatoes, carrots
82e117e1 Squelch "fatal: Resolve operation not in progress" message
0a1a68e7 Mappings Update & Patch Rebuild
2019-01-01 03:29:51 +00:00

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6.1 KiB
Diff

From 6fbda7d7dcd7dfc3d3bcc02e918bbe9bfdc277d3 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/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index 723fce204..f543532f8 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -1553,6 +1553,29 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {
}
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;
+ }
+ };
+ minecraftServer.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.getChatFlags() == EntityHuman.EnumChatVisibility.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 212e3cd4a..6700ce84c 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -699,6 +699,29 @@ 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 (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 a0cdd2317..984df4083 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java
@@ -14,6 +14,7 @@ public class ServerShutdownThread extends Thread {
public void run() {
try {
org.spigotmc.AsyncCatcher.enabled = false; // Spigot
+ org.spigotmc.AsyncCatcher.shuttingDown = true; // Paper
server.stop();
} catch (ExceptionWorldConflict ex) {
ex.printStackTrace();
diff --git a/src/main/java/org/spigotmc/AsyncCatcher.java b/src/main/java/org/spigotmc/AsyncCatcher.java
index 4b3aa85c9..e44c23016 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 f4e088c13..944151d14 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( " " );
--
2.20.1