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 CraftBukkit Changes: 17543ecf SPIGOT-5035: Error Using Virtual Merchant GUI 0fc6922b SPIGOT-5028: Villager#setVillagerExperience() doesn't work bdbdbe44 SPIGOT-5024: Fox error - Unknown target reason
123 lines
6.1 KiB
Diff
123 lines
6.1 KiB
Diff
From 6a087e34d6de6c85b1da8acad49c09f3b8179057 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Thu, 3 Mar 2016 01:17:12 -0600
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Subject: [PATCH] Ensure commands are not ran async
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Plugins calling Player.chat("/foo") or Server.dispatchCommand() could
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trigger the server to execute a command while on another thread.
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These commands would then process EXPECTING to be on the main thread, leaving to
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very hard to trace concurrency issues.
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This change will synchronize the command execution back to the main thread, causing a
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big slowdown in execution but throwing an exception at same time to raise awareness
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that it is happening so that plugin authors can fix their code to stop executing commands async.
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diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
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index d20037bd00..def713f495 100644
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--- a/src/main/java/net/minecraft/server/PlayerConnection.java
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+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
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@@ -1582,6 +1582,29 @@ public class PlayerConnection implements PacketListenerPlayIn {
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}
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if (!async && s.startsWith("/")) {
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+ // Paper Start
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+ if (!org.spigotmc.AsyncCatcher.shuttingDown && !org.bukkit.Bukkit.isPrimaryThread()) {
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+ final String fCommandLine = s;
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+ MinecraftServer.LOGGER.log(org.apache.logging.log4j.Level.ERROR, "Command Dispatched Async: " + fCommandLine);
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+ 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());
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+ Waitable wait = new Waitable() {
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+ @Override
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+ protected Object evaluate() {
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+ chat(fCommandLine, false);
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+ return null;
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+ }
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+ };
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+ minecraftServer.processQueue.add(wait);
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+ try {
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+ wait.get();
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+ return;
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+ } catch (InterruptedException e) {
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+ Thread.currentThread().interrupt(); // This is proper habit for java. If we aren't handling it, pass it on!
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+ } catch (Exception e) {
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+ throw new RuntimeException("Exception processing chat command", e.getCause());
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+ }
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+ }
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+ // Paper End
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this.handleCommand(s);
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} else if (this.player.getChatFlags() == EnumChatVisibility.SYSTEM) {
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// Do nothing, this is coming from a plugin
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index d37f4cdf4a..6c595a4c84 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -704,6 +704,29 @@ public final class CraftServer implements Server {
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Validate.notNull(commandLine, "CommandLine cannot be null");
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org.spigotmc.AsyncCatcher.catchOp( "command dispatch" ); // Spigot
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+ // Paper Start
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+ if (!org.spigotmc.AsyncCatcher.shuttingDown && !Bukkit.isPrimaryThread()) {
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+ final CommandSender fSender = sender;
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+ final String fCommandLine = commandLine;
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+ Bukkit.getLogger().log(Level.SEVERE, "Command Dispatched Async: " + commandLine);
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+ Bukkit.getLogger().log(Level.SEVERE, "Please notify author of plugin causing this execution to fix this bug! see: http://bit.ly/1oSiM6C", new Throwable());
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+ org.bukkit.craftbukkit.util.Waitable<Boolean> wait = new org.bukkit.craftbukkit.util.Waitable<Boolean>() {
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+ @Override
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+ protected Boolean evaluate() {
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+ return dispatchCommand(fSender, fCommandLine);
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+ }
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+ };
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+ net.minecraft.server.MinecraftServer.getServer().processQueue.add(wait);
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+ try {
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+ return wait.get();
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+ } catch (InterruptedException e) {
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+ Thread.currentThread().interrupt(); // This is proper habit for java. If we aren't handling it, pass it on!
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+ } catch (Exception e) {
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+ throw new RuntimeException("Exception processing dispatch command", e.getCause());
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+ }
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+ }
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+ // Paper End
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+
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if (commandMap.dispatch(sender, commandLine)) {
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return true;
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java b/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java
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index ddef523ea8..70f8d42992 100644
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--- a/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java
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+++ b/src/main/java/org/bukkit/craftbukkit/util/ServerShutdownThread.java
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@@ -13,6 +13,7 @@ public class ServerShutdownThread extends Thread {
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public void run() {
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try {
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org.spigotmc.AsyncCatcher.enabled = false; // Spigot
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+ org.spigotmc.AsyncCatcher.shuttingDown = true; // Paper
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server.close();
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} finally {
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try {
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diff --git a/src/main/java/org/spigotmc/AsyncCatcher.java b/src/main/java/org/spigotmc/AsyncCatcher.java
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index aeed769725..9f7d2ef932 100644
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--- a/src/main/java/org/spigotmc/AsyncCatcher.java
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+++ b/src/main/java/org/spigotmc/AsyncCatcher.java
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@@ -6,6 +6,7 @@ public class AsyncCatcher
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{
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public static boolean enabled = true;
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+ public static boolean shuttingDown = false; // Paper
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public static void catchOp(String reason)
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{
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diff --git a/src/main/java/org/spigotmc/RestartCommand.java b/src/main/java/org/spigotmc/RestartCommand.java
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index e7b953ca31..ccea803f58 100644
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--- a/src/main/java/org/spigotmc/RestartCommand.java
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+++ b/src/main/java/org/spigotmc/RestartCommand.java
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@@ -43,6 +43,7 @@ public class RestartCommand extends Command
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private static void restart(final String restartScript)
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{
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AsyncCatcher.enabled = false; // Disable async catcher incase it interferes with us
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+ org.spigotmc.AsyncCatcher.shuttingDown = true; // Paper
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try
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{
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String[] split = restartScript.split( " " );
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--
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2.21.0
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