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https://github.com/PaperMC/Paper.git
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ea0b63992c
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: 4727d326 Don't let Sign extend SignSide, mark API as experimental 9b29bdcc PR-845: Add preliminary support for multi sided signs CraftBukkit Changes: b346a5f6d PR-1170: Add preliminary support for multi sided signs 86c816189 Update SQLite version d9324b4bc Fix addition of custom smithing trim / transform recipes Spigot Changes: 7d7b241e Rebuild patches
171 lines
9.1 KiB
Diff
171 lines
9.1 KiB
Diff
From 0000000000000000000000000000000000000000 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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This also properly splits up the chat and command handling to reflect the server now
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having separate packets for both, and the client always using the correct packet. Text
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from a chat packet should never be parsed into a command, even if it starts with the `/`
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character.
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Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index 5291581c87b65be72f482b4da1fccd33fa053591..dae74cda3b9faa0c8aeecc6c7bc329950033f653 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -2042,7 +2042,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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return true;
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}
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- private static boolean isChatMessageIllegal(String message) {
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+ public static boolean isChatMessageIllegal(String message) { // Paper - private -> public
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for (int i = 0; i < message.length(); ++i) {
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if (!SharedConstants.isAllowedChatCharacter(message.charAt(i))) {
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return true;
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@@ -2059,7 +2059,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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}
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OutgoingChatMessage outgoing = OutgoingChatMessage.create(original);
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- if (!async && s.startsWith("/")) {
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+ if (false && !async && s.startsWith("/")) { // Paper - don't handle commands in chat logic
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this.handleCommand(s);
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} else if (this.player.getChatVisibility() == ChatVisiblity.SYSTEM) {
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// Do nothing, this is coming from a plugin
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@@ -2149,7 +2149,29 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
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}
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}
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- private void handleCommand(String s) {
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+ public void handleCommand(String s) { // Paper - private -> public
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+ // Paper Start
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+ if (!org.spigotmc.AsyncCatcher.shuttingDown && !org.bukkit.Bukkit.isPrimaryThread()) {
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+ LOGGER.error("Command Dispatched Async: " + s);
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+ LOGGER.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<Void> wait = new Waitable<>() {
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+ @Override
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+ protected Void evaluate() {
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+ ServerGamePacketListenerImpl.this.handleCommand(s);
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+ return null;
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+ }
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+ };
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+ server.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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co.aikar.timings.MinecraftTimings.playerCommandTimer.startTiming(); // Paper
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if ( org.spigotmc.SpigotConfig.logCommands ) // Spigot
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this.LOGGER.info(this.player.getScoreboardName() + " issued server command: " + s);
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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 77bfda008ca983ba5ba4b26510f629a9d743b73b..452171d26219f5169c707f17c56c46b928a84c60 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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@@ -855,6 +855,28 @@ 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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if (this.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/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
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index ada4dfb8e520eb2e383373771719f924b2062d1b..ce45e409ea3413cabb2e77c7013fa9b867817ad6 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
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@@ -512,7 +512,20 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
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public void chat(String msg) {
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if (this.getHandle().connection == null) return;
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- this.getHandle().connection.chat(msg, PlayerChatMessage.system(msg), false);
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+ // Paper start - improve chat handling
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+ if (ServerGamePacketListenerImpl.isChatMessageIllegal(msg)) {
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+ this.getHandle().connection.disconnect(Component.translatable("multiplayer.disconnect.illegal_characters"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_CHARACTERS);
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+ } else {
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+ if (msg.startsWith("/")) {
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+ this.getHandle().connection.handleCommand(msg);
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+ } else {
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+ final PlayerChatMessage playerChatMessage = PlayerChatMessage.system(msg).withResult(new net.minecraft.network.chat.ChatDecorator.ModernResult(Component.literal(msg), true, false));
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+ // TODO chat decorating
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+ // TODO text filtering
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+ this.getHandle().connection.chat(msg, playerChatMessage, false);
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+ }
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+ }
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+ // Paper end
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}
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@Override
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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 19c44daaa407b7c1c7a7ffe56fef8c8814c6d5b2..6a073a9dc44d93eba296a0e18a9c7be8a7881725 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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this.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 05e94702e42b8f5c35d2a112c486d57948a3acba..5409f230fdd53b70fc03c58177438534731ad4e6 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 882e93ad4471e3688f2fcfb1e6f16926786ee5e7..94d8ba376cd1f024b244654cac9bb62bb19e3060 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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