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 68551947f5b7d3471f15bd74ccd86519ab34c1c1..a0b0614ac7d2009db5c6c10ab4a5f09dd447c635 100644
--- a/src/main/java/net/minecraft/server/players/OldUsersConverter.java
+++ b/src/main/java/net/minecraft/server/players/OldUsersConverter.java
@@ -356,7 +356,11 @@ public class OldUsersConverter {
                         try {
                             root = NbtIo.readCompressed(new java.io.FileInputStream(file5), NbtAccounter.unlimitedHeap());
                         } catch (Exception exception) {
-                            io.papermc.paper.util.TraceUtil.printStackTrace(exception); // Paper
+                            // Paper start
+                            io.papermc.paper.util.StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(exception);
+                            exception.printStackTrace();
+                            com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception);
+                            // Paper end
                         }
 
                         if (root != null) {
@@ -369,7 +373,11 @@ public class OldUsersConverter {
                             try {
                                 NbtIo.writeCompressed(root, new java.io.FileOutputStream(file2));
                             } catch (Exception exception) {
-                                io.papermc.paper.util.TraceUtil.printStackTrace(exception); // Paper
+                                // Paper start
+                                io.papermc.paper.util.StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(exception);
+                                exception.printStackTrace();
+                                com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception);
+                                // Paper end
                             }
                        }
                         // 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 8183c26b4a5ad169a53702b8c45fd05cda934e80..36dec6cd78a0990ba3c09a4a748c259ef5c0a2ff 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
@@ -117,6 +117,7 @@ public class VillageSiege implements CustomSpawner {
                 entityzombie.finalizeSpawn(world, world.getCurrentDifficultyAt(entityzombie.blockPosition()), MobSpawnType.EVENT, (SpawnGroupData) 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 68436413645e0e33f22cdee0ea101ca01b343d75..4f5ff6849e0ea7a4f2491e0dbede7699554239dc 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -733,6 +733,7 @@ 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 com.destroystokyo.paper.event.server.ServerExceptionEvent(new com.destroystokyo.paper.exception.ServerInternalException(msg, throwable))); // Paper - ServerExceptionEvent
             entity.discard(org.bukkit.event.entity.EntityRemoveEvent.Cause.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 6a80479554f0c860a8dd6baa1a6506858fca83e3..6324689f52363f19501143c1649f0885684cb796 100644
--- a/src/main/java/net/minecraft/world/level/NaturalSpawner.java
+++ b/src/main/java/net/minecraft/world/level/NaturalSpawner.java
@@ -274,6 +274,7 @@ 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;
@@ -362,6 +363,7 @@ 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 7bfe757b605f4e5a16b28214ac3b497e738b45b5..fb953b2172c322e8abf5aa50060adbc00fe92832 100644
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
@@ -466,8 +466,13 @@ public class LevelChunk extends ChunkAccess {
         BlockState iblockdata = this.getBlockState(blockposition);
 
         if (!iblockdata.hasBlockEntity()) {
-            LevelChunk.LOGGER.warn("Trying to set block entity {} at position {}, but state {} does not allow it", new Object[]{blockEntity, blockposition, iblockdata});
-            new Exception().printStackTrace(); // CraftBukkit
+            // Paper start - ServerExceptionEvent
+            com.destroystokyo.paper.exception.ServerInternalException e = new com.destroystokyo.paper.exception.ServerInternalException(
+                "Trying to set block entity %s at position %s, but state %s does not allow it".formatted(blockEntity, blockposition, iblockdata)
+            );
+            e.printStackTrace();
+            com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(e);
+            // Paper end - ServerExceptionEvent
         } else {
             BlockState iblockdata1 = blockEntity.getBlockState();
 
@@ -951,6 +956,7 @@ 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 com.destroystokyo.paper.exception.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 15f273aa592828719de6e092d79a407dc8652dfe..b24e8255ab18eb5b2e4968aa62aa3d72ef33f0eb 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
@@ -296,6 +296,7 @@ public class RegionFile implements AutoCloseable {
                     return true;
                 }
             } catch (IOException ioexception) {
+                com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(ioexception); // Paper - ServerExceptionEvent
                 return false;
             }
         }
@@ -377,6 +378,7 @@ 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 a3ccc2da0927cc49e5fcfbd863e648ad0f25cc0d..dc7872afbdd06eb976bee6aee56a40b44084c24a 100644
--- a/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
+++ b/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
@@ -436,6 +436,8 @@ 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;
@@ -443,7 +445,7 @@ 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)
             }
