113 lines
4.5 KiB
Diff
113 lines
4.5 KiB
Diff
From c9297fde1beff53e303bb09caf0bb4b20c6792ce Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sun, 16 Sep 2018 00:00:16 -0400
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Subject: [PATCH] Fix major memory leaks in ExpiringMap
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computeIfAbsent would leak as the entry
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was never registered into the ttl map
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This fixes that ,as well as redesigns cleaning to
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not run on every manipulation, and instead to run clean
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once per tick per expiring map.
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diff --git a/src/main/java/net/minecraft/server/ExpiringMap.java b/src/main/java/net/minecraft/server/ExpiringMap.java
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index 4006f5a69c..5345b97241 100644
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--- a/src/main/java/net/minecraft/server/ExpiringMap.java
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+++ b/src/main/java/net/minecraft/server/ExpiringMap.java
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@@ -6,25 +6,44 @@ import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
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import it.unimi.dsi.fastutil.longs.Long2LongMap.Entry;
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import it.unimi.dsi.fastutil.objects.ObjectIterator;
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import java.util.Map;
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+import java.util.function.LongFunction;
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public class ExpiringMap<T> extends Long2ObjectOpenHashMap<T> {
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private final int a;
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- private final Long2LongMap b = new Long2LongLinkedOpenHashMap();
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+ private final Long2LongMap ttl = new Long2LongLinkedOpenHashMap(); // Paper
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public ExpiringMap(int i, int j) {
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super(i);
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this.a = j;
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}
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- private void a(long i) {
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- long j = SystemUtils.b();
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- this.b.put(i, j);
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- ObjectIterator objectiterator = this.b.long2LongEntrySet().iterator();
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+ // Paper start
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+ private synchronized void setAccess(long i) { a(i); } // Paper - OBFHELPER
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+ private synchronized void a(long i) {
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+ long j = System.currentTimeMillis(); // Paper
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+ this.ttl.put(i, j);
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+ if (!registered) {
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+ registered = true;
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+ MinecraftServer.getServer().expiringMaps.add(this);
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+ }
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+ }
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+
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+ @Override
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+ public synchronized T computeIfAbsent(long l, LongFunction<? extends T> longFunction) {
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+ setAccess(l);
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+ return super.computeIfAbsent(l, longFunction);
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+ }
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+ private boolean registered = false;
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+
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+ // Break clean to its own method to be ticked
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+ synchronized boolean clean() {
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+ long now = System.currentTimeMillis();
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+ ObjectIterator<Long2LongMap.Entry> objectiterator = this.ttl.long2LongEntrySet().iterator(); // Paper
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while(objectiterator.hasNext()) {
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- Entry entry = (Entry)objectiterator.next();
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- Object object = super.get(entry.getLongKey());
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- if (j - entry.getLongValue() <= (long)this.a) {
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+ Long2LongMap.Entry entry = objectiterator.next(); // Paper
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+ T object = super.get(entry.getLongKey()); // Paper
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+ if (now - entry.getLongValue() <= (long)this.a) {
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break;
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}
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@@ -33,7 +52,18 @@ public class ExpiringMap<T> extends Long2ObjectOpenHashMap<T> {
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objectiterator.remove();
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}
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}
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-
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+ if (this.ttl.size() != this.size) {
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+ MinecraftServer.LOGGER.error("WARNING: ExpiringMap desync - Memory leak risk!");
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+ for (Entry<T> entry : this.entries) {
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+ ttl.putIfAbsent(entry.getLongKey(), now);
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+ }
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+ }
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+ if (isEmpty()) {
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+ registered = false;
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+ return true;
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+ }
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+ return false;
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+ // Paper end
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}
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protected boolean a(T var1) {
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index 80e8b023cf..70a609efcc 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -155,6 +155,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
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public int autosavePeriod;
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public File bukkitDataPackFolder;
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public CommandDispatcher vanillaCommandDispatcher;
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+ public List<ExpiringMap> expiringMaps = java.util.Collections.synchronizedList(new java.util.ArrayList<>()); // PAper
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// CraftBukkit end
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// Spigot start
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public static final int TPS = 20;
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@@ -995,6 +996,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
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this.methodProfiler.e();
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org.spigotmc.WatchdogThread.tick(); // Spigot
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PaperLightingQueue.processQueue(startTime); // Paper
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+ expiringMaps.removeIf(ExpiringMap::clean); // Paper
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this.slackActivityAccountant.tickEnded(l); // Spigot
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co.aikar.timings.TimingsManager.FULL_SERVER_TICK.stopTiming(); // Paper
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}
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--
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2.19.0
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