PaperMC/patches/server/0267-Hook-into-CB-plugin-rewrites.patch
Spottedleaf 01a13871de
Rewrite chunk system (#8177)
Patch documentation to come

Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.

The above list is not complete. The patch documentation will complete it.

New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.

Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.

The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 01:02:51 -07:00

184 lines
7.4 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach@zachbr.io>
Date: Wed, 3 Oct 2018 20:09:18 -0400
Subject: [PATCH] Hook into CB plugin rewrites
Allows us to do fun stuff like rewrite the OBC util fastutil location to
our own relocation. Also lets us rewrite NMS calls for when we're
debugging in an IDE pre-relocate.
diff --git a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
index a679133a3de51e26eb19932ece9ade292879aefd..89a32de0a3fbb7465b078b2aa1cc1d156a4a174d 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/Commodore.java
@@ -6,7 +6,9 @@ import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Enumeration;
+import java.util.HashMap;
import java.util.HashSet;
+import java.util.Map;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
@@ -20,10 +22,15 @@ import org.bukkit.plugin.AuthorNagException;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.FieldVisitor;
+import org.objectweb.asm.Handle;
+import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
+import javax.annotation.Nonnull;
+
/**
* This file is imported from Commodore.
*
@@ -46,6 +53,42 @@ public class Commodore
"org/bukkit/inventory/ItemStack (I)V setTypeId"
) );
+ // Paper start - Plugin rewrites
+ private static final Map<String, String> SEARCH_AND_REMOVE = initReplacementsMap();
+ private static final java.util.jar.Manifest manifest = io.papermc.paper.util.JarManifests.manifest(Commodore.class);
+ private static Map<String, String> initReplacementsMap()
+ {
+ Map<String, String> getAndRemove = new HashMap<>();
+ // Be wary of maven shade's relocations
+ getAndRemove.put( "org/bukkit/".concat( "craftbukkit/libs/it/unimi/dsi/fastutil/" ), "org/bukkit/".concat( "craftbukkit/libs/" ) ); // Remap fastutil to our location
+
+ if ( Boolean.getBoolean( "debug.rewriteForIde" ) && manifest != null)
+ {
+ // unversion incoming calls for pre-relocate debug work
+ final String NMS_REVISION_PACKAGE = "v" + manifest.getMainAttributes().getValue("CraftBukkit-Package-Version") + "/";
+
+ getAndRemove.put( "org/bukkit/".concat( "craftbukkit/" + NMS_REVISION_PACKAGE ), NMS_REVISION_PACKAGE );
+ }
+
+ return getAndRemove;
+ }
+
+ @Nonnull
+ private static String getOriginalOrRewrite(@Nonnull String original)
+ {
+ String rewrite = null;
+ for ( Map.Entry<String, String> entry : SEARCH_AND_REMOVE.entrySet() )
+ {
+ if ( original.contains( entry.getKey() ) )
+ {
+ rewrite = original.replace( entry.getValue(), "" );
+ }
+ }
+
+ return rewrite != null ? rewrite : original;
+ }
+ // Paper end
+
public static void main(String[] args)
{
OptionParser parser = new OptionParser();
@@ -130,15 +173,86 @@ public class Commodore
cr.accept( new ClassVisitor( Opcodes.ASM9, cw )
{
+ // Paper start - Rewrite plugins
+ @Override
+ public FieldVisitor visitField(int access, String name, String desc, String signature, Object value)
+ {
+ desc = getOriginalOrRewrite( desc );
+ if ( signature != null ) {
+ signature = getOriginalOrRewrite( signature );
+ }
+
+ return super.visitField( access, name, desc, signature, value) ;
+ }
+ // Paper end
+
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions)
{
return new MethodVisitor( api, super.visitMethod( access, name, desc, signature, exceptions ) )
{
+ // Paper start - Plugin rewrites
+ @Override
+ public void visitInvokeDynamicInsn(String name, String desc, Handle bootstrapMethodHandle, Object... bootstrapMethodArguments)
+ {
+ // Paper start - Rewrite plugins
+ name = getOriginalOrRewrite( name );
+ if ( desc != null )
+ {
+ desc = getOriginalOrRewrite( desc );
+ }
+ // Paper end
+
+ super.visitInvokeDynamicInsn( name, desc, bootstrapMethodHandle, bootstrapMethodArguments );
+ }
+
+ @Override
+ public void visitTypeInsn(int opcode, String type)
+ {
+ type = getOriginalOrRewrite( type );
+
+ super.visitTypeInsn( opcode, type );
+ }
+
+ @Override
+ public void visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack) {
+ for ( int i = 0; i < local.length; i++ )
+ {
+ if ( !( local[i] instanceof String ) ) { continue; }
+
+ local[i] = getOriginalOrRewrite( (String) local[i] );
+ }
+
+ for ( int i = 0; i < stack.length; i++ )
+ {
+ if ( !( stack[i] instanceof String ) ) { continue; }
+
+ stack[i] = getOriginalOrRewrite( (String) stack[i] );
+ }
+
+ super.visitFrame( type, nLocal, local, nStack, stack );
+ }
+
+ @Override
+ public void visitLocalVariable(String name, String descriptor, String signature, Label start, Label end, int index)
+ {
+ descriptor = getOriginalOrRewrite( descriptor );
+
+ super.visitLocalVariable( name, descriptor, signature, start, end, index );
+ }
+ // Paper end
@Override
public void visitFieldInsn(int opcode, String owner, String name, String desc)
{
+ // Paper start - Rewrite plugins
+ owner = getOriginalOrRewrite( owner );
+ if ( desc != null )
+ {
+ desc = getOriginalOrRewrite( desc );
+ }
+ // Paper end
+
if ( owner.equals( "org/bukkit/block/Biome" ) )
{
switch ( name )
@@ -306,6 +420,14 @@ public class Commodore
return;
}
+ // Paper start - Rewrite plugins
+ owner = getOriginalOrRewrite( owner) ;
+ if (desc != null)
+ {
+ desc = getOriginalOrRewrite(desc);
+ }
+ // Paper end
+
if ( modern )
{
if ( owner.equals( "org/bukkit/Material" ) )