119 lines
6.3 KiB
Diff
119 lines
6.3 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/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
|
|
index d34e91887cd73009bf852fb849e495a8affed7a9..c70e290405c7c5ba247c1d3cce286579260cc76d 100644
|
|
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
|
|
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
|
|
@@ -1700,6 +1700,29 @@ public class PlayerConnection implements PacketListenerPlayIn {
|
|
}
|
|
|
|
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() == 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 0b1bd76438a94f26728d416ab54fd67189e041a2..8117f9df377d797adb9f4a913709b7493c5c2ba1 100644
|
|
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
|
|
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
|
|
@@ -759,6 +759,29 @@ 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 ddef523ea8762c927f37f7d16d581e43367e8c6b..70f8d42992aa348ef7b2d03d22cdd59d7c73f0fe 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
|
|
server.close();
|
|
} finally {
|
|
try {
|
|
diff --git a/src/main/java/org/spigotmc/AsyncCatcher.java b/src/main/java/org/spigotmc/AsyncCatcher.java
|
|
index aeed7697254af17ffefe8e578353ad216e15f9f3..9f7d2ef932ab41cef5d3d0736d20a7c7e4a2c888 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 56445844c7f542dd74c166bb09abd79cc17e1e12..26795b22e3ebc9594af79f93506a3c217cb784e2 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( " " );
|