papermc/Spigot-Server-Patches/0378-Fix-FileIOThread-concurrency-issues.patch
Aikar eb38e51ee0
Fix "prevent players from moving into unloaded chunks"
it used public method instead of private, and moved to world config

also improved the implementation to not use obfuscated stuff

Also removed the Fix Double chest conversion patch since its
fixed in other ways in vanilla
2018-10-23 21:13:58 -04:00

35 lines
1.7 KiB
Diff

From 7ac07ac07ac07ac07ac07ac07ac07ac07ac07ac0 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Wed, 3 Oct 2018 19:04:53 +0100
Subject: [PATCH] Fix FileIOThread concurrency issues
FileIOThread was using two volatile counters in order to track if
any pending work was in the queue, this causes potential concurrency
issues when this counter is updated from multiple threads, potentially
causing these counters to desync due to the unsafe volatile update
diff --git a/src/main/java/net/minecraft/server/FileIOThread.java b/src/main/java/net/minecraft/server/FileIOThread.java
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/FileIOThread.java
+++ b/src/main/java/net/minecraft/server/FileIOThread.java
@@ -9,7 +9,7 @@ import org.apache.logging.log4j.Logger;
public class FileIOThread implements Runnable {
private static final Logger a = LogManager.getLogger();
private static final FileIOThread b = new FileIOThread();
- private final List<IAsyncChunkSaver> c = Collections.synchronizedList(Lists.newArrayList());
+ private final List<IAsyncChunkSaver> c = Collections.synchronizedList(Lists.newArrayList()); private List<IAsyncChunkSaver> getThreadedIOQueue() { return c; } // Paper - OBFHELPER
private volatile long d;
private volatile long e;
private volatile boolean f;
@@ -72,7 +72,7 @@ public class FileIOThread implements Runnable {
public void b() throws InterruptedException {
this.f = true;
- while(this.d != this.e) {
+ while(!this.getThreadedIOQueue().isEmpty()) { // Paper - check actual list size
Thread.sleep(10L);
}
--
2.19.1