From 0000000000000000000000000000000000000000 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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/ServerSchedulerReportingWrapper.java
@@ -0,0 +0,0 @@
+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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -0,0 +0,0 @@
 package net.minecraft.server;
 
+import com.destroystokyo.paper.exception.ServerInternalException;
 import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
 import it.unimi.dsi.fastutil.longs.LongOpenHashSet;
@@ -0,0 +0,0 @@ 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.loc.x * 16) + "," + (this.loc.z * 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()
+                            + " (" + getType(blockposition) + ") where there was no entity tile!\n" +
+                            "Chunk coordinates: " + (this.loc.x * 16) + "," + (this.loc.z * 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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -0,0 +0,0 @@ import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
 import javax.annotation.Nullable;
+import com.destroystokyo.paper.exception.ServerInternalException;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 public class ChunkProviderServer extends IChunkProvider {
 
diff --git a/src/main/java/net/minecraft/server/NameReferencingFileConverter.java b/src/main/java/net/minecraft/server/NameReferencingFileConverter.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/NameReferencingFileConverter.java
+++ b/src/main/java/net/minecraft/server/NameReferencingFileConverter.java
@@ -0,0 +0,0 @@
 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;
@@ -0,0 +0,0 @@ public class NameReferencingFileConverter {
                             root = NBTCompressedStreamTools.a(new java.io.FileInputStream(file5));
                         } catch (Exception exception) {
                             exception.printStackTrace();
+                            ServerInternalException.reportInternalException(exception); // Paper
                         }
 
                         if (root != null) {
@@ -0,0 +0,0 @@ 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/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
+++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
@@ -0,0 +0,0 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
                 return true;
             } catch (Exception exception) {
                 PlayerChunkMap.LOGGER.error("Failed to save chunk {},{}", chunkcoordintpair.x, chunkcoordintpair.z, exception);
+                com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception); // Paper
                 return false;
             }
         }
diff --git a/src/main/java/net/minecraft/server/RegionFile.java b/src/main/java/net/minecraft/server/RegionFile.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/RegionFile.java
+++ b/src/main/java/net/minecraft/server/RegionFile.java
@@ -0,0 +0,0 @@ public class RegionFile implements AutoCloseable {
                     return true;
                 }
             } catch (IOException ioexception) {
+                com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(ioexception); // Paper
                 return false;
             }
         }
@@ -0,0 +0,0 @@ public class RegionFile implements AutoCloseable {
             filechannel.write(bytebuffer);
         } catch (Throwable throwable1) {
             throwable = throwable1;
+            com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(throwable); // Paper
             throw throwable1;
         } finally {
             if (filechannel != null) {
diff --git a/src/main/java/net/minecraft/server/SpawnerCreature.java b/src/main/java/net/minecraft/server/SpawnerCreature.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/SpawnerCreature.java
+++ b/src/main/java/net/minecraft/server/SpawnerCreature.java
@@ -0,0 +0,0 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
 // CraftBukkit start
+import com.destroystokyo.paper.exception.ServerInternalException;
 import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;
 // CraftBukkit end
 
@@ -0,0 +0,0 @@ public final class SpawnerCreature {
             }
         } catch (Exception exception) {
             SpawnerCreature.LOGGER.warn("Failed to create mob", exception);
+            ServerInternalException.reportInternalException(exception); // Paper
             return null;
         }
     }
@@ -0,0 +0,0 @@ public final class SpawnerCreature {
                                 entity = biomebase_biomemeta.c.a(generatoraccess.getMinecraftWorld());
                             } catch (Exception exception) {
                                 SpawnerCreature.LOGGER.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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/VillageSiege.java
+++ b/src/main/java/net/minecraft/server/VillageSiege.java
@@ -0,0 +0,0 @@
 package net.minecraft.server;
 
+import com.destroystokyo.paper.exception.ServerInternalException;
+
 import java.util.Iterator;
 import javax.annotation.Nullable;
 
@@ -0,0 +0,0 @@ public class VillageSiege implements MobSpawner {
                 entityzombie.prepare(worldserver, worldserver.getDamageScaler(entityzombie.getChunkCoordinates()), EnumMobSpawn.EVENT, (GroupDataEntity) null, (NBTTagCompound) null);
             } catch (Exception exception) {
                 exception.printStackTrace();
+                ServerInternalException.reportInternalException(exception); // Paper
                 return;
             }
 
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -0,0 +0,0 @@
 package net.minecraft.server;
 
+import co.aikar.timings.Timing;
+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 com.mojang.serialization.Codec;
 import java.io.IOException;
@@ -0,0 +0,0 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
                         gameprofilerfiller.exit();
                     } catch (Throwable throwable) {
                         // 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);
                         throwable.printStackTrace();
+                        getServer().getPluginManager().callEvent(new ServerExceptionEvent(new ServerInternalException(msg, throwable)));
+                        // Paper end
                         tilesThisCycle--;
                         this.tileEntityListTick.remove(tileTickPosition--);
                         continue;
@@ -0,0 +0,0 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
             consumer.accept(entity);
         } catch (Throwable throwable) {
             // 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);
             throwable.printStackTrace();
+            getServer().getPluginManager().callEvent(new ServerExceptionEvent(new ServerInternalException(msg, throwable)));
             entity.dead = true;
             return;
             // Paper end
diff --git a/src/main/java/net/minecraft/server/WorldPersistentData.java b/src/main/java/net/minecraft/server/WorldPersistentData.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/WorldPersistentData.java
+++ b/src/main/java/net/minecraft/server/WorldPersistentData.java
@@ -0,0 +0,0 @@ public class WorldPersistentData {
             nbttagcompound = GameProfileSerializer.a(this.c, DataFixTypes.SAVED_DATA, nbttagcompound1, j, i);
         } catch (Throwable throwable4) {
             throwable = throwable4;
+            com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(throwable); // Paper
             throw throwable4;
         } finally {
             if (pushbackinputstream != null) {
diff --git a/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java b/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
+++ b/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
@@ -0,0 +0,0 @@ import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Consumer;
 import java.util.logging.Level;
+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;
@@ -0,0 +0,0 @@ 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)
             }
