geforkt von Mirrors/Paper
c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
51 Zeilen
3.2 KiB
Diff
51 Zeilen
3.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Sun, 18 Jun 2023 23:04:46 -0700
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Subject: [PATCH] Do not read tile entities in chunks that are positioned
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outside of the chunk
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The tile entities are not accessible and so should not be loaded.
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This can happen as a result of users moving regionfiles around,
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which would cause a crash on Folia but would appear to function
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fine on Paper.
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
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index 5e1a68e3a920aab10a459b9b54f6abd59e7855e0..d42585bccb03f8ee1be5e37cfbe8520af4cc5454 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
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@@ -303,6 +303,13 @@ public class ChunkSerializer {
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for (int k1 = 0; k1 < nbttaglist3.size(); ++k1) {
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CompoundTag nbttagcompound4 = nbttaglist3.getCompound(k1);
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+ // Paper start - do not read tile entities positioned outside the chunk
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+ BlockPos blockposition = BlockEntity.getPosFromTag(nbttagcompound4);
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+ if ((blockposition.getX() >> 4) != chunkPos.x || (blockposition.getZ() >> 4) != chunkPos.z) {
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+ LOGGER.warn("Tile entity serialized in chunk " + chunkPos + " in world '" + world.getWorld().getName() + "' positioned at " + blockposition + " is located outside of the chunk");
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+ continue;
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+ }
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+ // Paper end - do not read tile entities positioned outside the chunk
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((ChunkAccess) object1).setBlockEntityNbt(nbttagcompound4);
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}
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@@ -507,10 +514,19 @@ public class ChunkSerializer {
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CompoundTag nbttagcompound1 = nbttaglist1.getCompound(i);
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boolean flag = nbttagcompound1.getBoolean("keepPacked");
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+ // Paper start - do not read tile entities positioned outside the chunk
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+ BlockPos blockposition = BlockEntity.getPosFromTag(nbttagcompound1); // moved up
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+ ChunkPos chunkPos = chunk.getPos();
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+ if ((blockposition.getX() >> 4) != chunkPos.x || (blockposition.getZ() >> 4) != chunkPos.z) {
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+ LOGGER.warn("Tile entity serialized in chunk " + chunkPos + " in world '" + world.getWorld().getName() + "' positioned at " + blockposition + " is located outside of the chunk");
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+ continue;
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+ }
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+ // Paper end - do not read tile entities positioned outside the chunk
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+
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if (flag) {
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chunk.setBlockEntityNbt(nbttagcompound1);
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} else {
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- BlockPos blockposition = BlockEntity.getPosFromTag(nbttagcompound1);
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+ // Paper - do not read tile entities positioned outside the chunk; move up
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BlockEntity tileentity = BlockEntity.loadStatic(blockposition, chunk.getBlockState(blockposition), nbttagcompound1, world.registryAccess());
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if (tileentity != null) {
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