PaperMC/patches/server/0051-Add-velocity-warnings.patch
Nassim Jahnke 789bc79280
Updated Upstream (Bukkit/CraftBukkit/Spigot) (#6457)
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:
c9a46ebf #653: Add World#spawn with randomizeData parameter
e49c2e3a Damageable should extend ItemMeta
01ff04f4 SPIGOT-5880, SPIGOT-5567: New ChunkGenerator API
ca5b4b1a SPIGOT-6697: Deprecate generateTree with BlockChangeDelegate as it does not handle tiles

CraftBukkit Changes:
7c8bbcbe SPIGOT-6716: Preserve the order of stored enchantments of enchanted books.
18027d02 #914: Add World#spawn with randomizeData parameter
3cad0316 SPIGOT-6714: Don't fire PlayerBucketEvent when empty
8c6d60cf Fix server crash with BlockPopulator when entities are at a negative chunk border
4f6bcc84 SPIGOT-5880, SPIGOT-5567: New ChunkGenerator API
78d5b35b SPIGOT-6697: Restore generateTree with BlockChangeDelegate behaviour
15792f0d Rebuild patch
c949675e SPIGOT-6713: Cancelling EntityTransformEvent Causes Deceased Slimes To Not Despawn
a955f15c Fix issues with new ChunkGenerator API
a0a37f41 SPIGOT-6630: Replacing an enchantment on an item creates a conflict error

Spigot Changes:
b166a49b Rebuild patches
3c1fc60a SPIGOT-6693: Composters only take in one item at custom hopper speeds
2021-08-25 09:59:26 +02:00

88 lines
4.9 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Joseph Hirschfeld <joe@ibj.io>
Date: Thu, 3 Mar 2016 02:48:12 -0600
Subject: [PATCH] Add velocity warnings
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 461251cc096e3e2efc52f7b5cc4de90dc5334a34..7c9e42e85e2ccc220d30d72f3f1c2c139e195bbb 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -278,6 +278,7 @@ public final class CraftServer implements Server {
public boolean ignoreVanillaPermissions = false;
private final List<CraftPlayer> playerView;
public int reloadCount;
+ public static Exception excessiveVelEx; // Paper - Velocity warnings
static {
ConfigurationSerialization.registerClass(CraftOfflinePlayer.class);
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index 118ba56a539471bded0cb42334576d5394aee4ab..7e50d589724c15ce30424cf1d82eb56e84acd28b 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -435,10 +435,40 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
public void setVelocity(Vector velocity) {
Preconditions.checkArgument(velocity != null, "velocity");
velocity.checkFinite();
+ // Paper start - Warn server owners when plugins try to set super high velocities
+ if (!(this instanceof org.bukkit.entity.Projectile) && isUnsafeVelocity(velocity)) {
+ CraftServer.excessiveVelEx = new Exception("Excessive velocity set detected: tried to set velocity of entity " + entity.getScoreboardName() + " id #" + getEntityId() + " to (" + velocity.getX() + "," + velocity.getY() + "," + velocity.getZ() + ").");
+ }
+ // Paper end
this.entity.setDeltaMovement(CraftVector.toNMS(velocity));
entity.hurtMarked = true;
}
+ // Paper start
+ /**
+ * Checks if the given velocity is not necessarily safe in all situations.
+ * This function returning true does not mean the velocity is dangerous or to be avoided, only that it may be
+ * a detriment to performance on the server.
+ *
+ * It is not to be used as a hard rule of any sort.
+ * Paper only uses it to warn server owners in watchdog crashes.
+ *
+ * @param vel incoming velocity to check
+ * @return if the velocity has the potential to be a performance detriment
+ */
+ private static boolean isUnsafeVelocity(Vector vel) {
+ final double x = vel.getX();
+ final double y = vel.getY();
+ final double z = vel.getZ();
+
+ if (x > 4 || x < -4 || y > 4 || y < -4 || z > 4 || z < -4) {
+ return true;
+ }
+
+ return false;
+ }
+ // Paper end
+
@Override
public double getHeight() {
return this.getHandle().getBbHeight();
diff --git a/src/main/java/org/spigotmc/WatchdogThread.java b/src/main/java/org/spigotmc/WatchdogThread.java
index d5863b0b06384b25eaa33572fa02649795463ed8..2693cc933d746e40d8a47d96c6cb6799f0a2472f 100644
--- a/src/main/java/org/spigotmc/WatchdogThread.java
+++ b/src/main/java/org/spigotmc/WatchdogThread.java
@@ -80,7 +80,19 @@ public class WatchdogThread extends Thread
log.log( Level.SEVERE, "During the run of the server, a physics stackoverflow was supressed" );
log.log( Level.SEVERE, "near " + net.minecraft.world.level.Level.lastPhysicsProblem );
}
- //
+ // Paper start - Warn in watchdog if an excessive velocity was ever set
+ if ( org.bukkit.craftbukkit.CraftServer.excessiveVelEx != null )
+ {
+ log.log( Level.SEVERE, "------------------------------" );
+ log.log( Level.SEVERE, "During the run of the server, a plugin set an excessive velocity on an entity" );
+ log.log( Level.SEVERE, "This may be the cause of the issue, or it may be entirely unrelated" );
+ log.log( Level.SEVERE, org.bukkit.craftbukkit.CraftServer.excessiveVelEx.getMessage());
+ for ( StackTraceElement stack : org.bukkit.craftbukkit.CraftServer.excessiveVelEx.getStackTrace() )
+ {
+ log.log( Level.SEVERE, "\t\t" + stack );
+ }
+ }
+ // Paper end
log.log( Level.SEVERE, "------------------------------" );
log.log( Level.SEVERE, "Server thread dump (Look for plugins here before reporting to Paper!):" ); // Paper
WatchdogThread.dumpThread( ManagementFactory.getThreadMXBean().getThreadInfo( MinecraftServer.getServer().serverThread.getId(), Integer.MAX_VALUE ), log );