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b31089a929
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: d264e972 #591: Add option for a consumer before spawning an item 1c537fce #590: Add spawn and transform reasons for piglin zombification. CraftBukkit Changes: ee5006d1 #810: Add option for a consumer before spawning an item f6a39d3c #809: Add spawn and transform reasons for piglin zombification. 0c24068a Organise imports Spigot Changes: bff52619 Organise imports
54 lines
3.1 KiB
Diff
54 lines
3.1 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: Sat, 11 Jul 2020 03:54:28 -0400
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Subject: [PATCH] Thread Safe Vanilla Command permission checking
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Datapacks check this on load and are built concurrently. This was breaking them badly due
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to race conditions.
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Plus, .canUse we want to be safe for async anyways.
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diff --git a/src/main/java/com/mojang/brigadier/tree/CommandNode.java b/src/main/java/com/mojang/brigadier/tree/CommandNode.java
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index 6976da79b20280fcd72dcfb8b48e2eb73257faf2..d9c47f3fc18266df3be1f564c01dfc3e26941380 100644
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--- a/src/main/java/com/mojang/brigadier/tree/CommandNode.java
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+++ b/src/main/java/com/mojang/brigadier/tree/CommandNode.java
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@@ -75,10 +75,10 @@ public abstract class CommandNode<S> implements Comparable<CommandNode<S>> {
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public synchronized boolean canUse(final S source) {
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if (source instanceof CommandListenerWrapper) {
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try {
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- ((CommandListenerWrapper) source).currentCommand = this;
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+ ((CommandListenerWrapper) source).currentCommand.set(this); // Paper
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return requirement.test(source);
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} finally {
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- ((CommandListenerWrapper) source).currentCommand = null;
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+ ((CommandListenerWrapper) source).currentCommand.set(null); // Paper
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}
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}
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// CraftBukkit end
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diff --git a/src/main/java/net/minecraft/server/CommandListenerWrapper.java b/src/main/java/net/minecraft/server/CommandListenerWrapper.java
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index efe2391f1648f4f83e9b77fdc6d9d81653cf65b3..31543b38a7c46d93333c5f96fdb718b0a7a087b2 100644
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--- a/src/main/java/net/minecraft/server/CommandListenerWrapper.java
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+++ b/src/main/java/net/minecraft/server/CommandListenerWrapper.java
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@@ -34,7 +34,7 @@ public class CommandListenerWrapper implements ICompletionProvider, com.destroys
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private final ResultConsumer<CommandListenerWrapper> l;
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private final ArgumentAnchor.Anchor m;
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private final Vec2F n;
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- public volatile CommandNode currentCommand; // CraftBukkit
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+ public ThreadLocal<CommandNode> currentCommand = new ThreadLocal<>(); // CraftBukkit // Paper
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public CommandListenerWrapper(ICommandListener icommandlistener, Vec3D vec3d, Vec2F vec2f, WorldServer worldserver, int i, String s, IChatBaseComponent ichatbasecomponent, MinecraftServer minecraftserver, @Nullable Entity entity) {
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this(icommandlistener, vec3d, vec2f, worldserver, i, s, ichatbasecomponent, minecraftserver, entity, false, (commandcontext, flag, j) -> {
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@@ -151,9 +151,11 @@ public class CommandListenerWrapper implements ICompletionProvider, com.destroys
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@Override
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public boolean hasPermission(int i) {
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// CraftBukkit start
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- CommandNode currentCommand = this.currentCommand;
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+ // Paper start - fix concurrency issue
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+ CommandNode currentCommand = this.currentCommand.get();
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if (currentCommand != null) {
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return hasPermission(i, org.bukkit.craftbukkit.command.VanillaCommandWrapper.getPermission(currentCommand));
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+ // Paper end
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}
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// CraftBukkit end
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