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Paper/Spigot-Server-Patches/0056-Add-exception-reporting-event.patch
Aikar 9dc4d6448b
Numerous fixes to entity related changes 
While it wasn't really "broken" before, if plugins use NMS
(which they really should't be) and mess with entity management
themselves, and get it wrong, they could ultimately corrupt our
state expectations.

I've been unable to reproduce any issues locally, but these changes
are the result of me analyzing the code pretty deeply and seeing
about how to make it more durable to abnormal usage.

Any servers seeing oddities, please run with -Ddebug.entities=true
and send me any logs triggered.
2019-04-05 23:08:45 -04:00

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From 0f1c8615e262b38dcdde638ce67cf87eaa8175bb Mon Sep 17 00:00:00 2001
From: Joseph Hirschfeld <joe@ibj.io>
Date: Thu, 3 Mar 2016 03:15:41 -0600
Subject: [PATCH] Add exception reporting event
diff --git a/src/main/java/com/destroystokyo/paper/ServerSchedulerReportingWrapper.java b/src/main/java/com/destroystokyo/paper/ServerSchedulerReportingWrapper.java
new file mode 100644
index 0000000000..f699ce18ca
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/ServerSchedulerReportingWrapper.java
@@ -0,0 +1,38 @@
+package com.destroystokyo.paper;
+
+import com.google.common.base.Preconditions;
+import org.bukkit.craftbukkit.scheduler.CraftTask;
+import com.destroystokyo.paper.event.server.ServerExceptionEvent;
+import com.destroystokyo.paper.exception.ServerSchedulerException;
+
+/**
+ * Reporting wrapper to catch exceptions not natively
+ */
+public class ServerSchedulerReportingWrapper implements Runnable {
+
+ private final CraftTask internalTask;
+
+ public ServerSchedulerReportingWrapper(CraftTask internalTask) {
+ this.internalTask = Preconditions.checkNotNull(internalTask, "internalTask");
+ }
+
+ @Override
+ public void run() {
+ try {
+ internalTask.run();
+ } catch (RuntimeException e) {
+ internalTask.getOwner().getServer().getPluginManager().callEvent(
+ new ServerExceptionEvent(new ServerSchedulerException(e, internalTask))
+ );
+ throw e;
+ } catch (Throwable t) {
+ internalTask.getOwner().getServer().getPluginManager().callEvent(
+ new ServerExceptionEvent(new ServerSchedulerException(t, internalTask))
+ ); //Do not rethrow, since it is not permitted with Runnable#run
+ }
+ }
+
+ public CraftTask getInternalTask() {
+ return internalTask;
+ }
+}
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index cb56d067b9..67cd4af4f5 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -1,5 +1,6 @@
package net.minecraft.server;
+import com.destroystokyo.paper.exception.ServerInternalException;
import com.google.common.collect.Maps;
import com.google.common.collect.Queues;
import com.google.common.collect.Sets;
@@ -424,6 +425,7 @@ public class Chunk implements IChunkAccess {
return this.getBlockData(i, j, k).b(this.world, new BlockPosition(i, j, k));
}
+ public IBlockData getBlockData(BlockPosition blockposition) { return getType(blockposition); } // Paper
public IBlockData getType(BlockPosition blockposition) {
return this.getBlockData(blockposition.getX(), blockposition.getY(), blockposition.getZ());
}
@@ -820,10 +822,15 @@ public class Chunk implements IChunkAccess {
this.tileEntities.remove(blockposition);
// Paper end
} else {
- System.out.println("Attempted to place a tile entity (" + tileentity + ") at " + tileentity.position.getX() + "," + tileentity.position.getY() + "," + tileentity.position.getZ()
- + " (" + getType(blockposition) + ") where there was no entity tile!");
- System.out.println("Chunk coordinates: " + (this.locX * 16) + "," + (this.locZ * 16));
- new Exception().printStackTrace();
+ // Paper start
+ ServerInternalException e = new ServerInternalException(
+ "Attempted to place a tile entity (" + tileentity + ") at " + tileentity.position.getX() + ","
+ + tileentity.position.getY() + "," + tileentity.position.getZ()
+ + " (" + getBlockData(blockposition) + ") where there was no entity tile!\n" +
+ "Chunk coordinates: " + (this.locX * 16) + "," + (this.locZ * 16));
+ e.printStackTrace();
+ ServerInternalException.reportInternalException(e);
+ // Paper end
// CraftBukkit end
}
}
diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index c2ecc034e8..1ed7c7e2c9 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -13,6 +13,7 @@ import java.util.concurrent.CompletableFuture;
import java.util.function.BooleanSupplier;
import java.util.function.Consumer;
import javax.annotation.Nullable;
+import com.destroystokyo.paper.exception.ServerInternalException;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
@@ -209,9 +210,16 @@ public class ChunkProviderServer implements IChunkProvider {
ichunkaccess.setLastSaved(this.world.getTime());
this.chunkLoader.saveChunk(this.world, ichunkaccess, unloaded); // Spigot
} catch (IOException ioexception) {
- ChunkProviderServer.a.error("Couldn't save chunk", ioexception);
+ // Paper start
+ String msg = "Couldn\'t save chunk";
+ ChunkProviderServer.a.error(msg, ioexception);
+ ServerInternalException.reportInternalException(ioexception);
} catch (ExceptionWorldConflict exceptionworldconflict) {
- ChunkProviderServer.a.error("Couldn't save chunk; already in use by another instance of Minecraft?", exceptionworldconflict);
+ ChunkProviderServer.a.error("Couldn\'t save chunk; already in use by another instance of Minecraft?", exceptionworldconflict);
+ String msg = "Couldn\'t save chunk; already in use by another instance of Minecraft?";
+ ChunkProviderServer.a.error(msg, exceptionworldconflict);
+ ServerInternalException.reportInternalException(exceptionworldconflict);
+ // Paper end
}
}
diff --git a/src/main/java/net/minecraft/server/NameReferencingFileConverter.java b/src/main/java/net/minecraft/server/NameReferencingFileConverter.java
index 09ef8729d9..bf67dbf54a 100644
--- a/src/main/java/net/minecraft/server/NameReferencingFileConverter.java
+++ b/src/main/java/net/minecraft/server/NameReferencingFileConverter.java
@@ -1,5 +1,6 @@
package net.minecraft.server;
+import com.destroystokyo.paper.exception.ServerInternalException;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.io.Files;
@@ -354,6 +355,7 @@ public class NameReferencingFileConverter {
root = NBTCompressedStreamTools.a(new java.io.FileInputStream(file5));
} catch (Exception exception) {
exception.printStackTrace();
+ ServerInternalException.reportInternalException(exception); // Paper
}
if (root != null) {
@@ -367,6 +369,7 @@ public class NameReferencingFileConverter {
NBTCompressedStreamTools.a(root, new java.io.FileOutputStream(file2));
} catch (Exception exception) {
exception.printStackTrace();
+ ServerInternalException.reportInternalException(exception); // Paper
}
}
// CraftBukkit end
diff --git a/src/main/java/net/minecraft/server/RegionFile.java b/src/main/java/net/minecraft/server/RegionFile.java
index ab151a14d0..0f1c74dd33 100644
--- a/src/main/java/net/minecraft/server/RegionFile.java
+++ b/src/main/java/net/minecraft/server/RegionFile.java
@@ -1,5 +1,6 @@
package net.minecraft.server;
+import com.destroystokyo.paper.exception.ServerInternalException;
import com.google.common.collect.Lists;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
@@ -103,6 +104,7 @@ public class RegionFile {
}
} catch (IOException ioexception) {
ioexception.printStackTrace();
+ ServerInternalException.reportInternalException(ioexception); // Paper
}
}
@@ -275,6 +277,7 @@ public class RegionFile {
this.b(i, j, (int) (SystemUtils.getTimeMillis() / 1000L));
} catch (IOException ioexception) {
ioexception.printStackTrace();
+ ServerInternalException.reportInternalException(ioexception); // Paper
}
}
diff --git a/src/main/java/net/minecraft/server/RegionFileCache.java b/src/main/java/net/minecraft/server/RegionFileCache.java
index c5ca896919..e507a996f1 100644
--- a/src/main/java/net/minecraft/server/RegionFileCache.java
+++ b/src/main/java/net/minecraft/server/RegionFileCache.java
@@ -1,5 +1,6 @@
package net.minecraft.server;
+import com.destroystokyo.paper.exception.ServerInternalException;
import com.google.common.collect.Maps;
import java.io.DataInputStream;
import java.io.DataOutputStream;
@@ -71,6 +72,7 @@ public class RegionFileCache {
}
} catch (IOException ioexception) {
ioexception.printStackTrace();
+ ServerInternalException.reportInternalException(ioexception); // Paper
}
}
diff --git a/src/main/java/net/minecraft/server/SpawnerCreature.java b/src/main/java/net/minecraft/server/SpawnerCreature.java
index 6720a9648e..2aa0db5c22 100644
--- a/src/main/java/net/minecraft/server/SpawnerCreature.java
+++ b/src/main/java/net/minecraft/server/SpawnerCreature.java
@@ -10,6 +10,7 @@ import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
// CraftBukkit start
+import com.destroystokyo.paper.exception.ServerInternalException;
import org.bukkit.craftbukkit.util.LongHash;
import org.bukkit.craftbukkit.util.LongHashSet;
import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;
@@ -171,6 +172,7 @@ public final class SpawnerCreature {
entityinsentient = (EntityInsentient) biomebase_biomemeta.b.a((World) worldserver);
} catch (Exception exception) {
SpawnerCreature.a.warn("Failed to create mob", exception);
+ ServerInternalException.reportInternalException(exception); // Paper
return j1;
}
@@ -291,6 +293,7 @@ public final class SpawnerCreature {
entityinsentient = (EntityInsentient) biomebase_biomemeta.b.a(generatoraccess.getMinecraftWorld());
} catch (Exception exception) {
SpawnerCreature.a.warn("Failed to create mob", exception);
+ ServerInternalException.reportInternalException(exception); // Paper
continue;
}
diff --git a/src/main/java/net/minecraft/server/VillageSiege.java b/src/main/java/net/minecraft/server/VillageSiege.java
index 58122b18eb..0ac1fb53a4 100644
--- a/src/main/java/net/minecraft/server/VillageSiege.java
+++ b/src/main/java/net/minecraft/server/VillageSiege.java
@@ -1,5 +1,7 @@
package net.minecraft.server;
+import com.destroystokyo.paper.exception.ServerInternalException;
+
import java.util.Iterator;
import java.util.List;
import javax.annotation.Nullable;
@@ -136,6 +138,7 @@ public class VillageSiege {
entityzombie.prepare(this.a.getDamageScaler(new BlockPosition(entityzombie)), (GroupDataEntity) null, (NBTTagCompound) null);
} catch (Exception exception) {
exception.printStackTrace();
+ ServerInternalException.reportInternalException(exception); // Paper
return false;
}
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 09cf98ccdd..6e7c0c9da4 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -1,6 +1,8 @@
package net.minecraft.server;
import co.aikar.timings.Timings;
+import com.destroystokyo.paper.event.server.ServerExceptionEvent;
+import com.destroystokyo.paper.exception.ServerInternalException;
import com.google.common.base.MoreObjects;
import com.google.common.collect.Lists;
import it.unimi.dsi.fastutil.longs.LongSet;
@@ -1151,8 +1153,10 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
} catch (Throwable throwable1) {
entity.tickTimer.stopTiming();
// Paper start - Prevent tile entity and entity crashes
- System.err.println("Entity threw exception at " + entity.world.getWorld().getName() + ":" + entity.locX + "," + entity.locY + "," + entity.locZ);
+ String msg = "Entity threw exception at " + entity.world.getWorld().getName() + ":" + entity.locX + "," + entity.locY + "," + entity.locZ;
+ System.err.println(msg);
throwable1.printStackTrace();
+ getServer().getPluginManager().callEvent(new ServerExceptionEvent(new ServerInternalException(msg, throwable1)));
entity.dead = true;
continue;
// Paper end
@@ -1217,8 +1221,10 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
this.methodProfiler.exit();
} catch (Throwable throwable2) {
// Paper start - Prevent tile entity and entity crashes
- System.err.println("TileEntity threw exception at " + tileentity.world.getWorld().getName() + ":" + tileentity.position.getX() + "," + tileentity.position.getY() + "," + tileentity.position.getZ());
+ String msg = "TileEntity threw exception at " + tileentity.world.getWorld().getName() + ":" + tileentity.position.getX() + "," + tileentity.position.getY() + "," + tileentity.position.getZ();
+ System.err.println(msg);
throwable2.printStackTrace();
+ getServer().getPluginManager().callEvent(new ServerExceptionEvent(new ServerInternalException(msg, throwable2)));
tilesThisCycle--;
this.tileEntityListTick.remove(tileTickPosition--);
continue;
diff --git a/src/main/java/net/minecraft/server/WorldPersistentData.java b/src/main/java/net/minecraft/server/WorldPersistentData.java
index 478bf49976..8d51af2867 100644
--- a/src/main/java/net/minecraft/server/WorldPersistentData.java
+++ b/src/main/java/net/minecraft/server/WorldPersistentData.java
@@ -138,6 +138,7 @@ public class WorldPersistentData {
nbttagcompound = GameProfileSerializer.a(idatamanager.i(), DataFixTypes.SAVED_DATA, nbttagcompound1, j, i);
} catch (Throwable throwable1) {
+ com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(throwable1); // Paper
throwable = throwable1;
throw throwable1;
} finally {
diff --git a/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java b/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
index d75cc42e11..0e9d5fe3a7 100644
--- a/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
+++ b/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
@@ -17,6 +17,9 @@ import java.util.function.Consumer;
import java.util.logging.Level;
import co.aikar.timings.MinecraftTimings; // Paper
+import com.destroystokyo.paper.ServerSchedulerReportingWrapper;
+import com.destroystokyo.paper.event.server.ServerExceptionEvent;
+import com.destroystokyo.paper.exception.ServerSchedulerException;
import org.apache.commons.lang.Validate;
import org.bukkit.plugin.IllegalPluginAccessException;
import org.bukkit.plugin.Plugin;
@@ -391,20 +394,26 @@ public class CraftScheduler implements BukkitScheduler {
try {
task.run();
} catch (final Throwable throwable) {
+ // Paper start
+ String msg = String.format(
+ "Task #%s for %s generated an exception",
+ task.getTaskId(),
+ task.getOwner().getDescription().getFullName());
task.getOwner().getLogger().log(
Level.WARNING,
- String.format(
- "Task #%s for %s generated an exception",
- task.getTaskId(),
- task.getOwner().getDescription().getFullName()),
+ msg,
throwable);
+ task.getOwner().getServer().getPluginManager().callEvent(
+ new ServerExceptionEvent(new ServerSchedulerException(msg, throwable, task))
+ );
+ // Paper end
} finally {
currentTask = null;
}
parsePending();
} else {
debugTail = debugTail.setNext(new CraftAsyncDebugger(currentTick + RECENT_TICKS, task.getOwner(), task.getTaskClass()));
- executor.execute(task);
+ executor.execute(new ServerSchedulerReportingWrapper(task)); // Paper
// We don't need to parse pending
// (async tasks must live with race-conditions if they attempt to cancel between these few lines of code)
}
--
2.21.0
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