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papermc/Spigot-Server-Patches/0354-Optimize-and-Fix-ExpiringMap-Issues.patch
Shane Freeder ea855e2b46 Updated Upstream (Bukkit/CraftBukkit/Spigot) 
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Developers!: You will need to clean up your work/Minecraft/1.13.2 folder
for this

Also, restore a patch that was dropped in the last upstream

Bukkit Changes:
279eeab3 Fix command description not being set
96e2bb18 Remove debug print from SyntheticEventTest

CraftBukkit Changes:
d3ed1516 Fix dangerously threaded beacons
217a293d Don't relocate joptsimple to allow --help to work.
1be05a21 Prepare for imminent Java 12 release
a49270b2 Mappings Update
5259d80c SPIGOT-4669: Fix PlayerTeleportEvent coordinates for relative teleports

Spigot Changes:
e6eb36f2 Rebuild patches
2019-03-20 01:55:16 +00:00

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From 370fdd742cc646eda4300fc51556ad3a03aacfb1 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 16 Sep 2018 00:00:16 -0400
Subject: [PATCH] Optimize and Fix ExpiringMap Issues
computeIfAbsent would leak as the entry was never
registered into the ttl map, as well as some other
methods were at risk, so they were added.
This also synchronizes all access make the map thread safe.
This also redesigns cleaning to not run on every
manipulation, and instead to run clean
once per tick per active expiring map.
diff --git a/src/main/java/net/minecraft/server/ChunkGeneratorAbstract.java b/src/main/java/net/minecraft/server/ChunkGeneratorAbstract.java
index a23768441..835a2aae4 100644
--- a/src/main/java/net/minecraft/server/ChunkGeneratorAbstract.java
+++ b/src/main/java/net/minecraft/server/ChunkGeneratorAbstract.java
@@ -142,13 +142,13 @@ public abstract class ChunkGeneratorAbstract<C extends GeneratorSettings> implem
public Long2ObjectMap<StructureStart> getStructureStartCache(StructureGenerator<? extends WorldGenFeatureConfiguration> structuregenerator) {
return (Long2ObjectMap) this.d.computeIfAbsent(structuregenerator, (structuregenerator1) -> {
- return Long2ObjectMaps.synchronize(new ExpiringMap<>(8192, 10000));
+ return new ExpiringMap<>(8192, 10000); // Paper - already synchronized
});
}
public Long2ObjectMap<LongSet> getStructureCache(StructureGenerator<? extends WorldGenFeatureConfiguration> structuregenerator) {
return (Long2ObjectMap) this.e.computeIfAbsent(structuregenerator, (structuregenerator1) -> {
- return Long2ObjectMaps.synchronize(new ExpiringMap<>(8192, 10000));
+ return new ExpiringMap<>(8192, 10000); // Paper - already synchronized
});
}
diff --git a/src/main/java/net/minecraft/server/ExpiringMap.java b/src/main/java/net/minecraft/server/ExpiringMap.java
index bd3636479..bf6095137 100644
--- a/src/main/java/net/minecraft/server/ExpiringMap.java
+++ b/src/main/java/net/minecraft/server/ExpiringMap.java
@@ -2,87 +2,211 @@ package net.minecraft.server;
import it.unimi.dsi.fastutil.longs.Long2LongLinkedOpenHashMap;
import it.unimi.dsi.fastutil.longs.Long2LongMap;
+import it.unimi.dsi.fastutil.longs.Long2ObjectMaps;
import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
-import it.unimi.dsi.fastutil.longs.Long2LongMap.Entry;
import it.unimi.dsi.fastutil.objects.ObjectCollection;
import it.unimi.dsi.fastutil.objects.ObjectIterator;
import java.util.Map;
+import java.util.function.BiFunction;
+import java.util.function.Function;
import java.util.function.LongFunction;
-public class ExpiringMap<T> extends Long2ObjectOpenHashMap<T> {
-
+public class ExpiringMap<T> extends Long2ObjectMaps.SynchronizedMap<T> { // paper - synchronize accesss
private final int a;
- private final Long2LongMap b = new Long2LongLinkedOpenHashMap();
+ private final Long2LongMap ttl = new Long2LongLinkedOpenHashMap(); // Paper
+ private static final boolean DEBUG_EXPIRING_MAP = Boolean.getBoolean("debug.expiringmap");
public ExpiringMap(int i, int j) {
- super(i);
+ super(new Long2ObjectOpenHashMap<>(i)); // Paper
this.a = j;
}
+ // Paper start
+ private void setAccess(long i) { a(i); } // Paper - OBFHELPER
private void a(long i) {
- long j = SystemUtils.getMonotonicMillis();
+ synchronized (this.sync) {
+ long j = System.currentTimeMillis(); // Paper
+ this.ttl.put(i, j);
+ if (!registered) {
+ registered = true;
+ MinecraftServer.getServer().expiringMaps.add(this);
+ }
+ }
+ }
- this.b.put(i, j);
- // CraftBukkit start
- cleanup();
+ @Override
+ public T compute(long l, BiFunction<? super Long, ? super T, ? extends T> biFunction) {
+ setAccess(l);
+ return super.compute(l, biFunction);
}
- public void cleanup() {
- long j = SystemUtils.getMonotonicMillis();
- // CraftBukkit end
- ObjectIterator objectiterator = this.b.long2LongEntrySet().iterator();
+ @Override
+ public T putIfAbsent(long l, T t) {
+ setAccess(l);
+ return super.putIfAbsent(l, t);
+ }
- while (objectiterator.hasNext()) {
- Long2LongMap.Entry entry = (Long2LongMap.Entry) objectiterator.next(); // CraftBukkit - decompile error
- T t0 = super.get(entry.getLongKey());
+ @Override
+ public T computeIfPresent(long l, BiFunction<? super Long, ? super T, ? extends T> biFunction) {
+ setAccess(l);
+ return super.computeIfPresent(l, biFunction);
+ }
- if (j - entry.getLongValue() <= (long) this.a) {
- break;
- }
+ @Override
+ public T computeIfAbsent(long l, LongFunction<? extends T> longFunction) {
+ setAccess(l);
+ return super.computeIfAbsent(l, longFunction);
+ }
- if (t0 != null && this.a(t0)) {
- super.remove(entry.getLongKey());
- objectiterator.remove();
- }
+
+ @Override
+ public boolean replace(long l, T t, T v1) {
+ setAccess(l);
+ return super.replace(l, t, v1);
+ }
+
+ @Override
+ public T replace(long l, T t) {
+ setAccess(l);
+ return super.replace(l, t);
+ }
+
+ @Override
+ public T putIfAbsent(Long aLong, T t) {
+ setAccess(aLong);
+ return super.putIfAbsent(aLong, t);
+ }
+
+ @Override
+ public boolean replace(Long aLong, T t, T v1) {
+ setAccess(aLong);
+ return super.replace(aLong, t, v1);
+ }
+
+ @Override
+ public T replace(Long aLong, T t) {
+ setAccess(aLong);
+ return super.replace(aLong, t);
+ }
+
+ @Override
+ public T computeIfAbsent(Long aLong, Function<? super Long, ? extends T> function) {
+ setAccess(aLong);
+ return super.computeIfAbsent(aLong, function);
+ }
+
+ @Override
+ public T computeIfPresent(Long aLong, BiFunction<? super Long, ? super T, ? extends T> biFunction) {
+ setAccess(aLong);
+ return super.computeIfPresent(aLong, biFunction);
+ }
+
+ @Override
+ public T compute(Long aLong, BiFunction<? super Long, ? super T, ? extends T> biFunction) {
+ setAccess(aLong);
+ return super.compute(aLong, biFunction);
+ }
+
+ @Override
+ public void clear() {
+ synchronized (this.sync) {
+ ttl.clear();
+ super.clear();
}
+ }
+ private boolean registered = false;
+
+ // Break clean to its own method to be ticked
+ boolean clean() {
+ synchronized (this.sync) {
+ long now = System.currentTimeMillis();
+ ObjectIterator<Long2LongMap.Entry> objectiterator = this.ttl.long2LongEntrySet().iterator(); // Paper
+
+ while (objectiterator.hasNext()) {
+ Long2LongMap.Entry entry = objectiterator.next(); // Paper
+ T object = super.get(entry.getLongKey()); // Paper
+ if (now - entry.getLongValue() <= (long) this.a) {
+ break;
+ }
+
+ if (object != null && this.a(object)) {
+ super.remove(entry.getLongKey());
+ objectiterator.remove();
+ }
+ }
+ int ttlSize = this.ttl.size();
+ int thisSize = this.size();
+ if (ttlSize < thisSize) {
+ if (DEBUG_EXPIRING_MAP) {
+ MinecraftServer.LOGGER.warn("WARNING: ExpiringMap desync (ttl:" + ttlSize + " < actual:" + thisSize + ")");
+ }
+ try {
+ for (Entry<T> entry : this.long2ObjectEntrySet()) {
+ ttl.putIfAbsent(entry.getLongKey(), now);
+ }
+ } catch (Exception ignored) {
+ } // Ignore any como's
+ } else if (ttlSize > this.size()) {
+ if (DEBUG_EXPIRING_MAP) {
+ MinecraftServer.LOGGER.warn("WARNING: ExpiringMap desync (ttl:" + ttlSize + " > actual:" + thisSize + ")");
+ }
+ try {
+ this.ttl.long2LongEntrySet().removeIf(entry -> !this.containsKey(entry.getLongKey()));
+ } catch (Exception ignored) {
+ } // Ignore any como's
+ }
+ if (isEmpty()) {
+ registered = false;
+ return true;
+ }
+ return false;
+ }
+ // Paper end
}
- protected boolean a(T t0) {
+ protected boolean a(T var1) {
return true;
}
- public T put(long i, T t0) {
+ public T put(long i, T object) {
this.a(i);
- return super.put(i, t0);
+ return (T)super.put(i, object);
}
- public T put(Long olong, T t0) {
+ public T put(Long olong, T object) {
this.a(olong);
- return super.put(olong, t0);
+ return (T)super.put(olong, object);
}
public T get(long i) {
- this.a(i);
- return super.get(i);
+ // Paper start - don't setAccess unless a hit
+ T t = super.get(i);
+ if (t != null) {
+ this.setAccess(i);
+ }
+ return t;
+ // Paper end
}
- public void putAll(Map<? extends Long, ? extends T> map) {
+ public void putAll(Map<? extends Long, ? extends T> var1) {
throw new RuntimeException("Not implemented");
}
- public T remove(long i) {
+ public T remove(long var1) {
throw new RuntimeException("Not implemented");
}
- public T remove(Object object) {
+ public T remove(Object var1) {
throw new RuntimeException("Not implemented");
}
+ // Paper start
+ /*
// CraftBukkit start
@Override
public T computeIfAbsent(long l, LongFunction<? extends T> lf) {
- this.b.put(l, SystemUtils.getMonotonicMillis());
+ this.ttl.put(l, SystemUtils.getMonotonicMillis()); // Paper
return super.computeIfAbsent(l, lf);
}
@@ -92,4 +216,5 @@ public class ExpiringMap<T> extends Long2ObjectOpenHashMap<T> {
return super.values();
}
// CraftBukkit end
+ */ // Paper end
}
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 38c0201ac..ae271a57f 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -150,6 +150,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
public int autosavePeriod;
public File bukkitDataPackFolder;
public CommandDispatcher vanillaCommandDispatcher;
+ public List<ExpiringMap> expiringMaps = java.util.Collections.synchronizedList(new java.util.ArrayList<>()); // Paper
// CraftBukkit end
// Spigot start
public static final int TPS = 20;
@@ -995,6 +996,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
this.methodProfiler.exit();
org.spigotmc.WatchdogThread.tick(); // Spigot
PaperLightingQueue.processQueue(startTime); // Paper
+ expiringMaps.removeIf(ExpiringMap::clean); // Paper
this.slackActivityAccountant.tickEnded(l); // Spigot
co.aikar.timings.TimingsManager.FULL_SERVER_TICK.stopTiming(); // Paper
}
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java
index 4cca65666..9c917370a 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java
@@ -144,7 +144,7 @@ public class CustomChunkGenerator extends InternalChunkGenerator<GeneratorSettin
@Override
public Long2ObjectMap<StructureStart> getStructureStartCache(StructureGenerator<? extends WorldGenFeatureConfiguration> structuregenerator) {
return (Long2ObjectMap) this.structureStartCache.computeIfAbsent(structuregenerator, (s) -> {
- return Long2ObjectMaps.synchronize(new ExpiringMap(8192, 10000));
+ return new ExpiringMap(8192, 10000); // Paper - already synchronized
});
}
@@ -154,7 +154,7 @@ public class CustomChunkGenerator extends InternalChunkGenerator<GeneratorSettin
@Override
public Long2ObjectMap<LongSet> getStructureCache(StructureGenerator<? extends WorldGenFeatureConfiguration> structuregenerator) {
return (Long2ObjectMap) this.structureCache.computeIfAbsent(structuregenerator, (s) -> {
- return Long2ObjectMaps.synchronize(new ExpiringMap(8192, 10000));
+ return new ExpiringMap(8192, 10000); // Paper - already synchronized
});
}
--
2.21.0
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