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Upstream has released updates that appear to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing Bukkit Changes: 716b4fce Revert SnakeYAML upgrade ca6f8942 Update to Minecraft 1.18-rc3 57e7e952 #683: Add Player#showDemoScreen CraftBukkit Changes: c98abfb0 Update to Minecraft 1.18-rc3 9b258501 #960: Add Player#showDemoScreen d9542247 Produce remapped jars after bootstrap jar 99f3ddde SPIGOT-6808: Fix RegionAccessor#getBiome Spigot Changes: b7a4222e Update to Minecraft 1.18-rc3
92 lines
4.4 KiB
Diff
92 lines
4.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Fri, 29 May 2020 20:29:02 -0400
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Subject: [PATCH] Synchronize PalettedContainer instead of ReentrantLock
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Mojang has flaws in their logic about chunks being concurrently
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wrote to. So we constantly see crashes around multiple threads writing.
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Additionally, java has optimized synchronization so well that its
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in many times faster than trying to manage read wrote locks for low
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contention situations.
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And this is extremely a low contention situation.
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diff --git a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
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index 71fbb476ad081424cc8807c01818f332887ae366..ec285516c2c403b65b2446f20b187628539d96a6 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
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@@ -34,15 +34,15 @@ public class PalettedContainer<T> implements PaletteResize<T> {
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private final ThreadingDetector threadingDetector = new ThreadingDetector("PalettedContainer");
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public void acquire() {
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- this.threadingDetector.checkAndLock();
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+ // this.threadingDetector.checkAndLock(); // Paper - disable this - use proper synchronization
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}
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public void release() {
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- this.threadingDetector.checkAndUnlock();
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+ // this.threadingDetector.checkAndUnlock(); // Paper - disable this
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}
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public static <T> Codec<PalettedContainer<T>> codec(IdMap<T> idList, Codec<T> entryCodec, PalettedContainer.Strategy provider, T object) {
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- return RecordCodecBuilder.create((instance) -> {
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+ return RecordCodecBuilder.<DiscData<T>>create((instance) -> { // Paper - decompile fixes
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return instance.group(entryCodec.mapResult(ExtraCodecs.orElsePartial(object)).listOf().fieldOf("palette").forGetter(PalettedContainer.DiscData::paletteEntries), Codec.LONG_STREAM.optionalFieldOf("data").forGetter(PalettedContainer.DiscData::storage)).apply(instance, PalettedContainer.DiscData::new);
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}).comapFlatMap((serialized) -> {
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return read(idList, provider, serialized);
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@@ -84,7 +84,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
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return data2.palette.idFor(object);
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}
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- public T getAndSet(int x, int y, int z, T value) {
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+ public synchronized T getAndSet(int x, int y, int z, T value) { // Paper - synchronize
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this.acquire();
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Object var5;
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@@ -107,7 +107,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
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return this.data.palette.valueFor(j);
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}
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- public void set(int x, int y, int z, T value) {
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+ public synchronized void set(int x, int y, int z, T value) { // Paper - synchronize
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this.acquire();
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try {
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@@ -141,7 +141,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
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});
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}
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- public void read(FriendlyByteBuf buf) {
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+ public synchronized void read(FriendlyByteBuf buf) { // Paper - synchronize
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this.acquire();
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try {
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@@ -156,7 +156,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
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}
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- public void write(FriendlyByteBuf buf) {
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+ public synchronized void write(FriendlyByteBuf buf) { // Paper - synchronize
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this.acquire();
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try {
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@@ -167,7 +167,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
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}
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- private static <T> DataResult<PalettedContainer<T>> read(IdMap<T> idList, PalettedContainer.Strategy provider, PalettedContainer.DiscData<T> serialized) {
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+ private static synchronized <T> DataResult<PalettedContainer<T>> read(IdMap<T> idList, PalettedContainer.Strategy provider, PalettedContainer.DiscData<T> serialized) { // Paper - synchronize
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List<T> list = serialized.paletteEntries();
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int i = provider.size();
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int j = provider.calculateBitsForSerialization(idList, list.size());
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@@ -206,7 +206,7 @@ public class PalettedContainer<T> implements PaletteResize<T> {
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return DataResult.success(new PalettedContainer<>(idList, provider, configuration, bitStorage, list));
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}
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- private PalettedContainer.DiscData<T> write(IdMap<T> idList, PalettedContainer.Strategy provider) {
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+ private synchronized PalettedContainer.DiscData<T> write(IdMap<T> idList, PalettedContainer.Strategy provider) { // Paper - synchronize
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this.acquire();
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PalettedContainer.DiscData var12;
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