Paper/patches/server/0060-Add-exception-reporting-event.patch

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..f699ce18ca044f813e194ef2786b7ea853ea86e7
--- /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/players/OldUsersConverter.java b/src/main/java/net/minecraft/server/players/OldUsersConverter.java
index 8d06e8d286da2573e40794adab695ff77e5afd86..b3c6e76105ee26a79a84a203935530f859460652 100644
--- a/src/main/java/net/minecraft/server/players/OldUsersConverter.java
+++ b/src/main/java/net/minecraft/server/players/OldUsersConverter.java
@@ -1,5 +1,6 @@
 package net.minecraft.server.players;
 
+import com.destroystokyo.paper.exception.ServerInternalException;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.common.io.Files;
@@ -357,6 +358,7 @@ public class OldUsersConverter {
                             root = NbtIo.readCompressed(new java.io.FileInputStream(file5), NbtAccounter.unlimitedHeap());
                         } catch (Exception exception) {
                             exception.printStackTrace();
+                            ServerInternalException.reportInternalException(exception); // Paper - ServerExceptionEvent
                         }
 
                         if (root != null) {
@@ -370,6 +372,7 @@ public class OldUsersConverter {
                                 NbtIo.writeCompressed(root, new java.io.FileOutputStream(file2));
                             } catch (Exception exception) {
                                 exception.printStackTrace();
+                                ServerInternalException.reportInternalException(exception); // Paper - ServerExceptionEvent
                             }
                        }
                         // CraftBukkit end
diff --git a/src/main/java/net/minecraft/world/entity/ai/village/VillageSiege.java b/src/main/java/net/minecraft/world/entity/ai/village/VillageSiege.java
index c6fb4c33d7ea52b88d8fc0d90748cbab7387c565..2b5b2869589991be37a4f128faabbff50e661470 100644
--- a/src/main/java/net/minecraft/world/entity/ai/village/VillageSiege.java
+++ b/src/main/java/net/minecraft/world/entity/ai/village/VillageSiege.java
@@ -118,6 +118,7 @@ public class VillageSiege implements CustomSpawner {
                 entityzombie.finalizeSpawn(world, world.getCurrentDifficultyAt(entityzombie.blockPosition()), MobSpawnType.EVENT, (SpawnGroupData) null, (CompoundTag) null);
             } catch (Exception exception) {
                 VillageSiege.LOGGER.warn("Failed to create zombie for village siege at {}", vec3d, exception);
+                com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception); // Paper - ServerExceptionEvent
                 return;
             }
 
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 19f1be39c5e245c7e999ade36e53bff8d011dedb..0023f4f4572261e38136d3629cc35679454294f5 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -1,5 +1,10 @@
 package net.minecraft.world.level;
 
+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;
@@ -741,6 +746,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
             // Paper start - Prevent block entity and entity crashes
             final String msg = String.format("Entity threw exception at %s:%s,%s,%s", entity.level().getWorld().getName(), entity.getX(), entity.getY(), entity.getZ());
             MinecraftServer.LOGGER.error(msg, throwable);
+            getCraftServer().getPluginManager().callEvent(new ServerExceptionEvent(new ServerInternalException(msg, throwable))); // Paper - ServerExceptionEvent
             entity.discard();
             // Paper end - Prevent block entity and entity crashes
         }
diff --git a/src/main/java/net/minecraft/world/level/NaturalSpawner.java b/src/main/java/net/minecraft/world/level/NaturalSpawner.java
index 5d65baba605dd83e5f74d526aeda36d8ede8c014..604766a286d00bb4b40c20482376fe80651beabe 100644
--- a/src/main/java/net/minecraft/world/level/NaturalSpawner.java
+++ b/src/main/java/net/minecraft/world/level/NaturalSpawner.java
@@ -291,6 +291,7 @@ public final class NaturalSpawner {
             NaturalSpawner.LOGGER.warn("Can't spawn entity of type: {}", BuiltInRegistries.ENTITY_TYPE.getKey(type));
         } catch (Exception exception) {
             NaturalSpawner.LOGGER.warn("Failed to create mob", exception);
+            com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception); // Paper - ServerExceptionEvent
         }
 
         return null;
@@ -404,6 +405,7 @@ public final class NaturalSpawner {
                                     entity = biomesettingsmobs_c.type.create(world.getLevel());
                                 } catch (Exception exception) {
                                     NaturalSpawner.LOGGER.warn("Failed to create mob", exception);
+                                    com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception); // Paper - ServerExceptionEvent
                                     continue;
                                 }
 
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
index ae62ef9bad1774cc6aecb686660ef19244bd1365..54aed742984809601d64f22ccf5db2d68b3831a2 100644
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
@@ -1,6 +1,7 @@
 package net.minecraft.world.level.chunk;
 
 import com.google.common.collect.ImmutableList;
+import com.destroystokyo.paper.exception.ServerInternalException;
 import com.google.common.collect.Maps;
 import com.google.common.collect.UnmodifiableIterator;
 import com.mojang.logging.LogUtils;
@@ -581,10 +582,16 @@ public class LevelChunk extends ChunkAccess {
 
             // CraftBukkit start
         } else {
-            System.out.println("Attempted to place a tile entity (" + blockEntity + ") at " + blockEntity.getBlockPos().getX() + "," + blockEntity.getBlockPos().getY() + "," + blockEntity.getBlockPos().getZ()
-                + " (" + this.getBlockState(blockposition) + ") where there was no entity tile!");
-            System.out.println("Chunk coordinates: " + (this.chunkPos.x * 16) + "," + (this.chunkPos.z * 16));
-            new Exception().printStackTrace();
+            // Paper start - ServerExceptionEvent
+            ServerInternalException e = new ServerInternalException(
+                "Attempted to place a tile entity (" + blockEntity + ") at " + blockEntity.getBlockPos().getX() + ","
+                    + blockEntity.getBlockPos().getY() + "," + blockEntity.getBlockPos().getZ()
+                    + " (" + getBlockState(blockposition) + ") where there was no entity tile!\n" +
+                    "Chunk coordinates: " + (this.chunkPos.x * 16) + "," + (this.chunkPos.z * 16) +
+                    "\nWorld: " + level.getLevel().dimension().location());
+            e.printStackTrace();
+            ServerInternalException.reportInternalException(e);
+            // Paper end - ServerExceptionEvent
             // CraftBukkit end
         }
     }
@@ -1162,6 +1169,7 @@ public class LevelChunk extends ChunkAccess {
                         // Paper start - Prevent block entity and entity crashes
                         final String msg = String.format("BlockEntity threw exception at %s:%s,%s,%s", LevelChunk.this.getLevel().getWorld().getName(), this.getPos().getX(), this.getPos().getY(), this.getPos().getZ());
                         net.minecraft.server.MinecraftServer.LOGGER.error(msg, throwable);
+                        net.minecraft.world.level.chunk.LevelChunk.this.level.getCraftServer().getPluginManager().callEvent(new com.destroystokyo.paper.event.server.ServerExceptionEvent(new ServerInternalException(msg, throwable))); // Paper - ServerExceptionEvent
                         LevelChunk.this.removeBlockEntity(this.getPos());
                         // Paper end - Prevent block entity and entity crashes
                         // Spigot start
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
index 5103081e8469dd5a393595eae00c6f6c9d0a5028..9623a7bac79af37016ba5a5b37d4ef0b3dcb7312 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
@@ -275,6 +275,7 @@ public class RegionFile implements AutoCloseable {
                     return true;
                 }
             } catch (IOException ioexception) {
+                com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(ioexception); // Paper - ServerExceptionEvent
                 return false;
             }
         }
@@ -356,6 +357,7 @@ public class RegionFile implements AutoCloseable {
             ((java.nio.Buffer) buf).position(5); // CraftBukkit - decompile error
             filechannel.write(buf);
         } catch (Throwable throwable) {
+            com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(throwable); // Paper - ServerExceptionEvent
             if (filechannel != null) {
                 try {
                     filechannel.close();
diff --git a/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java b/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
index bd1057681d0c7470c497b873ff18abf03a0a6a66..f39c836970572fe2e29e794a6af35332af8f7424 100644
--- a/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
+++ b/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
@@ -434,6 +434,8 @@ public class CraftScheduler implements BukkitScheduler {
                             msg,
                             throwable);
                     }
+                    org.bukkit.Bukkit.getServer().getPluginManager().callEvent(
+                        new com.destroystokyo.paper.event.server.ServerExceptionEvent(new com.destroystokyo.paper.exception.ServerSchedulerException(msg, throwable, task)));
                     // Paper end
                 } finally {
                     this.currentTask = null;
@@ -441,7 +443,7 @@ public class CraftScheduler implements BukkitScheduler {
                 this.parsePending();
             } else {
                 this.debugTail = this.debugTail.setNext(new CraftAsyncDebugger(currentTick + CraftScheduler.RECENT_TICKS, task.getOwner(), task.getTaskClass()));
-                this.executor.execute(task);
+                this.executor.execute(new com.destroystokyo.paper.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)
             }