123 lines
6.1 KiB
Diff
123 lines
6.1 KiB
Diff
From afe18ef667aa63c426197f85c3785aa7e2e36e46 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 b9e6a3275c..9a83e5fc0b 100644
|
|
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
|
|
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
|
|
@@ -1533,6 +1533,29 @@ 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 7b4af7a904..c6e6ae4fe7 100644
|
|
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
|
|
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
|
|
@@ -701,6 +701,29 @@ 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 a0cdd2317c..984df4083d 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 4b3aa85c97..e44c230165 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 f4e088c134..944151d140 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( " " );
|
|
--
|
|
2.21.0
|
|
|